From d4c1aad008faa32011e03ceec2a72f026c616a86 Mon Sep 17 00:00:00 2001 From: dingjsh <47954233@qq.com> Date: Thu, 11 Oct 2018 19:40:22 +0800 Subject: [PATCH 01/25] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E6=97=A5=E5=BF=97?= =?UTF-8?q?=E5=88=86=E6=9E=90=E5=B7=A5=E5=85=B7=20h2=E6=95=B0=E6=8D=AE?= =?UTF-8?q?=E5=BA=93=E7=9A=84=E4=BD=BF=E7=94=A8=E8=AF=B4=E6=98=8E=E3=80=82?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index d50ab14..f0de7a3 100644 --- a/README.md +++ b/README.md @@ -24,5 +24,10 @@ agent.exclude.class.regex.default=.*EnhancerByCGLIB.*;.*FastClassByCGLIB.* # 记录方法的耗时时是采用nanoTime,还是currentTimeMillis,nanoTime更准确，但是会耗时一些 agent.log.nano=true ``` - - + +## agent日志分析器使用 +agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分析工具，除了基础功能，对于有sql能力的同学，你可以直接使用[console](http://47.96.150.36:8080/console)登录后，直接写sql进行统计，你可以按自己想要的维度来进行处理。 +- JDBC URL: jdbc:h2:mem:~/h2test +- USer Name : sa +- Password : 空 +登录后，你就可以尽情的写sql了。 \ No newline at end of file From 965196d7696e4fda55215fa613cba446cc4014e7 Mon Sep 17 00:00:00 2001 From: dingjs Date: Wed, 6 May 2020 20:53:24 +0800 Subject: [PATCH 02/25] Update README.md --- README.md | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index f0de7a3..444b246 100644 --- a/README.md +++ b/README.md @@ -30,4 +30,7 @@ agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分 - JDBC URL: jdbc:h2:mem:~/h2test - USer Name : sa - Password : 空 -登录后，你就可以尽情的写sql了。 \ No newline at end of file +登录后，你就可以尽情的写sql了。 + +## 欢迎关注我的公众号 +![程序员阿水](https://ftp.bmp.ovh/imgs/2020/05/450fcb3d1a2fe4eb.jpg) From 8c9884d3a2faac1d3947c06b2d58da56d9b5c8c8 Mon Sep 17 00:00:00 2001 From: dingjs Date: Wed, 6 May 2020 20:53:55 +0800 Subject: [PATCH 03/25] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 444b246..7a47736 100644 --- a/README.md +++ b/README.md @@ -33,4 +33,5 @@ agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分 登录后，你就可以尽情的写sql了。 ## 欢迎关注我的公众号 +- 程序员阿水 ![程序员阿水](https://ftp.bmp.ovh/imgs/2020/05/450fcb3d1a2fe4eb.jpg) From e2fda3f1f11d39712f00be875c4f96fae4fa57a2 Mon Sep 17 00:00:00 2001 From: dingjs Date: Wed, 6 May 2020 20:54:50 +0800 Subject: [PATCH 04/25] Update README.md --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 7a47736..d08247e 100644 --- a/README.md +++ b/README.md @@ -34,4 +34,6 @@ agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分 ## 欢迎关注我的公众号 - 程序员阿水 + + ![程序员阿水](https://ftp.bmp.ovh/imgs/2020/05/450fcb3d1a2fe4eb.jpg) From 2e2ad7119641bf4f2503de1daf6869764eb72c4c Mon Sep 17 00:00:00 2001 From: bean <523084685@qq.com> Date: Wed, 13 May 2020 13:37:32 +0800 Subject: [PATCH 05/25] =?UTF-8?q?fix=20:bug:=20=E4=BF=AE=E5=A4=8D=E6=8B=BC?= =?UTF-8?q?=E5=86=99=E9=94=99=E8=AF=AF?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index d08247e..c50e7c7 100644 --- a/README.md +++ b/README.md @@ -3,7 +3,7 @@ javaagent是一个简单优雅的java agent,利用java自带的instrument特性+javassist字节码编辑技术，实现了无侵入的方法级性能监控。相比于NewRelic或者开源的[pinpoint](https://github.com/naver/pinpoint),以及阿里的[arthas](https://github.com/alibaba/arthas),本工具主打的是简单，我们只记录每个方法的执行次数和时间，并输出到json格式的日志文件中。基于javaagent的日志，你可以使用严丽同学开发的[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)进行分析查询，也可以使用[在线日志分析器](http://47.96.150.36:8080)，或者可以自己去写分析器，这样可以让你快速定位生产环境的性能瓶颈。 ## 集成 -java启动参数中就有jaaagent,你只需要在JAVA_OPTS中加入`-javaagent:/opt/javaagent/javaagent.jar=/opt/javaagent/agent.properties`就实现了方法级监控。其中`=`前指定的是jar包的路径，`=`后指定的是对agent的一些配置参数。 +java启动参数中就有javaagent,你只需要在JAVA_OPTS中加入`-javaagent:/opt/javaagent/javaagent.jar=/opt/javaagent/agent.properties`就实现了方法级监控。其中`=`前指定的是jar包的路径，`=`后指定的是对agent的一些配置参数。 ### agent.properties说明 ``` From 85162ee7f1438ae0a8508bdb885d2fa46d861cc3 Mon Sep 17 00:00:00 2001 From: dingjs Date: Fri, 2 Apr 2021 19:36:28 +0800 Subject: [PATCH 06/25] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index c50e7c7..ca64c49 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # Javaagent ## 概述 -javaagent是一个简单优雅的java agent,利用java自带的instrument特性+javassist字节码编辑技术，实现了无侵入的方法级性能监控。相比于NewRelic或者开源的[pinpoint](https://github.com/naver/pinpoint),以及阿里的[arthas](https://github.com/alibaba/arthas),本工具主打的是简单，我们只记录每个方法的执行次数和时间，并输出到json格式的日志文件中。基于javaagent的日志，你可以使用严丽同学开发的[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)进行分析查询，也可以使用[在线日志分析器](http://47.96.150.36:8080)，或者可以自己去写分析器，这样可以让你快速定位生产环境的性能瓶颈。 +javaagent是一个简单优雅的java agent,利用java自带的instrument特性+javassist字节码编辑技术，实现了无侵入的方法级性能监控。相比于NewRelic或者开源的[pinpoint](https://github.com/naver/pinpoint),以及阿里的[arthas](https://github.com/alibaba/arthas),本工具主打的是简单，我们只记录每个方法的执行次数和时间，并输出到json格式的日志文件中。基于javaagent的日志，你可以使用严丽同学开发的[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)进行分析查询，或者可以自己去写分析器，这样可以让你快速定位生产环境的性能瓶颈。 ## 集成 java启动参数中就有javaagent,你只需要在JAVA_OPTS中加入`-javaagent:/opt/javaagent/javaagent.jar=/opt/javaagent/agent.properties`就实现了方法级监控。其中`=`前指定的是jar包的路径，`=`后指定的是对agent的一些配置参数。 From ed0ed7dc6c3965d01e00a78f1dfb1ba82dd54002 Mon Sep 17 00:00:00 2001 From: dingjs Date: Thu, 29 Apr 2021 09:07:04 +0800 Subject: [PATCH 07/25] Update README.md --- README.md | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/README.md b/README.md index ca64c49..397c6cb 100644 --- a/README.md +++ b/README.md @@ -34,6 +34,5 @@ agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分 ## 欢迎关注我的公众号 - 程序员阿水 +![程序员阿水](https://user-images.githubusercontent.com/3361218/116490540-3ae6da80-a8ca-11eb-97b9-5b9f41dc7740.jpg) - -![程序员阿水](https://ftp.bmp.ovh/imgs/2020/05/450fcb3d1a2fe4eb.jpg) From ebd97903fe71d10cf6417c554b1f751fa97578a3 Mon Sep 17 00:00:00 2001 From: dingjs Date: Thu, 29 Apr 2021 09:07:30 +0800 Subject: [PATCH 08/25] Update README.md --- README.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 397c6cb..9cc5e4f 100644 --- a/README.md +++ b/README.md @@ -33,6 +33,7 @@ agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分 登录后，你就可以尽情的写sql了。 ## 欢迎关注我的公众号 -- 程序员阿水 +- 程序员阿水 + ![程序员阿水](https://user-images.githubusercontent.com/3361218/116490540-3ae6da80-a8ca-11eb-97b9-5b9f41dc7740.jpg) From bbfa87c1778c528964a5ac83b25cccd44a948899 Mon Sep 17 00:00:00 2001 From: dingjs Date: Thu, 29 Apr 2021 09:08:33 +0800 Subject: [PATCH 09/25] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 9cc5e4f..8736aa2 100644 --- a/README.md +++ b/README.md @@ -26,7 +26,7 @@ agent.log.nano=true ``` ## agent日志分析器使用 -agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分析工具，除了基础功能，对于有sql能力的同学，你可以直接使用[console](http://47.96.150.36:8080/console)登录后，直接写sql进行统计，你可以按自己想要的维度来进行处理。 +agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分析工具，除了基础功能，对于有sql能力的同学，你可以直接使用[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)自带的[console](http://XXXX/console)登录后，直接写sql进行统计，你可以按自己想要的维度来进行处理。 - JDBC URL: jdbc:h2:mem:~/h2test - USer Name : sa - Password : 空 From 34a7f59b6b3f9cac1d53822da0880ccc55ee06f5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Wed, 25 Aug 2021 10:46:56 +0800 Subject: [PATCH 10/25] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E4=BB=A3=E7=A0=81?= =?UTF-8?q?=E5=9D=8F=E5=91=B3=E9=81=93=EF=BC=8C=E5=88=A0=E9=99=A4=E6=97=A0?= =?UTF-8?q?=E7=94=A8=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- pom.xml | 2 +- src/com/wenshuo/agent/Agent.java | 8 +-- src/com/wenshuo/agent/AgentUtils.java | 62 +++++++++---------- src/com/wenshuo/agent/ConfigUtils.java | 29 ++++----- src/com/wenshuo/agent/ExecuteLogAnalyzer.java | 39 ------------ src/com/wenshuo/agent/NamedThreadFactory.java | 14 ----- src/com/wenshuo/agent/PojoDetector.java | 6 +- .../wenshuo/agent/log/ExecuteLogUtils.java | 56 ++++++++--------- .../agent/log/MethodExecuteJSONformatter.java | 29 ++++----- .../AgentLogClassFileTransformer.java | 10 +-- 10 files changed, 94 insertions(+), 161 deletions(-) delete mode 100644 src/com/wenshuo/agent/ExecuteLogAnalyzer.java diff --git a/pom.xml b/pom.xml index 6812957..4e771ad 100644 --- a/pom.xml +++ b/pom.xml @@ -4,7 +4,7 @@ com.wenshuo javaagent - 2.1.0 + 2.1.1 jar diff --git a/src/com/wenshuo/agent/Agent.java b/src/com/wenshuo/agent/Agent.java index f655005..1bfd12b 100644 --- a/src/com/wenshuo/agent/Agent.java +++ b/src/com/wenshuo/agent/Agent.java @@ -5,22 +5,18 @@ * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package com.wenshuo.agent; - -import java.io.IOException; import java.lang.instrument.Instrumentation; - import com.wenshuo.agent.log.ExecuteLogUtils; import com.wenshuo.agent.transformer.AgentLogClassFileTransformer; /** * Agent - * + * * @author dingjsh */ public class Agent { - public static void premain(String agentArs, Instrumentation inst) - throws IOException { + public static void premain(String agentArs, Instrumentation inst) { // 初始化配置 ConfigUtils.initProperties(agentArs); ExecuteLogUtils.init(); diff --git a/src/com/wenshuo/agent/AgentUtils.java b/src/com/wenshuo/agent/AgentUtils.java index 6ee752b..e133898 100644 --- a/src/com/wenshuo/agent/AgentUtils.java +++ b/src/com/wenshuo/agent/AgentUtils.java @@ -15,7 +15,7 @@ /** * AgentUtils - * + * * @author dingjsh * @time 2015-7-27下午05:26:24 */ @@ -25,7 +25,7 @@ public class AgentUtils { *

* Checks if a String is whitespace, empty ("") or null. *

- * + * * 
      * StringUtils.isBlank(null)      = true
      * StringUtils.isBlank("")        = true
@@ -33,9 +33,8 @@ public class AgentUtils {
      * StringUtils.isBlank("bob")     = false
      * StringUtils.isBlank("  bob  ") = false
      *
- * - * @param str - * the String to check, may be null + * + * @param str the String to check, may be null * @return true if the String is null, empty or whitespace * @since 2.0 */ @@ -45,7 +44,7 @@ public static boolean isBlank(String str) { return true; } for (int i = 0; i < strLen; i++) { - if ((Character.isWhitespace(str.charAt(i)) == false)) { + if (!Character.isWhitespace(str.charAt(i))) { return false; } } @@ -56,7 +55,7 @@ public static boolean isBlank(String str) { *

* Checks if a String is not empty (""), not null and not whitespace only. *

- * + * * 
      * StringUtils.isNotBlank(null)      = false
      * StringUtils.isNotBlank("")        = false
@@ -64,14 +63,13 @@ public static boolean isBlank(String str) {
      * StringUtils.isNotBlank("bob")     = true
      * StringUtils.isNotBlank("  bob  ") = true
      *
- * - * @param str - * the String to check, may be null + * + * @param str the String to check, may be null * @return true if the String is not empty and not null and not - * whitespace + * whitespace * @since 2.0 */ - public static boolean isNotBlank(String str) { + static boolean isNotBlank(String str) { return !isBlank(str); } @@ -80,11 +78,10 @@ public static boolean isNotBlank(String str) { *

* Equivalent to {@link InputStream#close()}, except any exceptions will be * ignored. This is typically used in finally blocks. - * - * @param input - * the InputStream to close, may be null or already closed + * + * @param input the InputStream to close, may be null or already closed */ - public static void closeQuietly(InputStream input) { + static void closeQuietly(InputStream input) { try { if (input != null) { input.close(); @@ -103,44 +100,45 @@ public static int copy(InputStream input, OutputStream output) return (int) count; } - public static long copyLarge(InputStream input, OutputStream output) + private static long copyLarge(InputStream input, OutputStream output) throws IOException { byte[] buffer = new byte[4096]; long count = 0; - int n = 0; + int n; while (-1 != (n = input.read(buffer))) { output.write(buffer, 0, n); count += n; } return count; } - + // read toByteArray //----------------------------------------------------------------------- + /** * Get the contents of an InputStream as a byte[]. *

* This method buffers the input internally, so there is no need to use a * BufferedInputStream. - * - * @param input the InputStream to read from + * + * @param input the InputStream to read from * @return the requested byte array * @throws NullPointerException if the input is null - * @throws IOException if an I/O error occurs + * @throws IOException if an I/O error occurs */ public static byte[] toByteArray(InputStream input) throws IOException { ByteArrayOutputStream output = new ByteArrayOutputStream(); copy(input, output); return output.toByteArray(); } - + /** * Unconditionally close a Writer. *

* Equivalent to {@link Writer#close()}, except any exceptions will be ignored. * This is typically used in finally blocks. * - * @param output the Writer to close, may be null or already closed + * @param output the Writer to close, may be null or already closed */ public static void closeQuietly(Writer output) { try { @@ -151,30 +149,30 @@ public static void closeQuietly(Writer output) { // ignore } } - + /** * Makes a directory, including any necessary but nonexistent parent * directories. If there already exists a file with specified name or * the directory cannot be created then an exception is thrown. * - * @param directory directory to create, must not be null + * @param directory directory to create, must not be null * @throws NullPointerException if the directory is null - * @throws IOException if the directory cannot be created + * @throws IOException if the directory cannot be created */ public static void forceMkdir(File directory) throws IOException { if (directory.exists()) { if (directory.isFile()) { String message = - "File " - + directory - + " exists and is " - + "not a directory. Unable to create directory."; + "File " + + directory + + " exists and is " + + "not a directory. Unable to create directory."; throw new IOException(message); } } else { if (!directory.mkdirs()) { String message = - "Unable to create directory " + directory; + "Unable to create directory " + directory; throw new IOException(message); } } diff --git a/src/com/wenshuo/agent/ConfigUtils.java b/src/com/wenshuo/agent/ConfigUtils.java index 5fd66ca..4de6036 100644 --- a/src/com/wenshuo/agent/ConfigUtils.java +++ b/src/com/wenshuo/agent/ConfigUtils.java @@ -11,7 +11,7 @@ /** * 获取配置信息
* ConfigUtils - * + * * @author dingjsh * @time 2015-7-27下午09:16:18 */ @@ -29,14 +29,14 @@ private ConfigUtils() { super(); } - public static void initProperties(String propertiesFileName) { + static void initProperties(String propertiesFileName) { props = getProperties(propertiesFileName); initExcluePackages(); initIncludePackages(); initExcludeClassRegexs(); } - public static String getProperty(String key) { + private static String getProperty(String key) { if (null != props && AgentUtils.isNotBlank(key)) { return props.getProperty(key); } @@ -76,10 +76,10 @@ private static void initExcluePackages() { String excludeDefault = getProperty(ConfigConsts.EXCLUDE_PACKAGE_DEFAULT); String excludes = getProperty(ConfigConsts.EXCLUDE_PACKAGE); excludePackages = new HashSet(); - if (null != excludeDefault && AgentUtils.isNotBlank(excludeDefault)) { + if (AgentUtils.isNotBlank(excludeDefault)) { excludePackages.addAll(Arrays.asList(excludeDefault.split(";"))); } - if (null != excludes && AgentUtils.isNotBlank(excludes)) { + if (AgentUtils.isNotBlank(excludes)) { excludePackages.addAll(Arrays.asList(excludes.split(";"))); } } @@ -93,7 +93,7 @@ private static void initIncludePackages() { if (null == includePackages) { String includes = getProperty(ConfigConsts.INCLUDE_PACKAGE); includePackages = new HashSet(); - if (null != includes && AgentUtils.isNotBlank(includes)) { + if (AgentUtils.isNotBlank(includes)) { includePackages.addAll(Arrays.asList(includes.split(";"))); } } @@ -119,11 +119,11 @@ private static void initExcludeClassRegexs() { if (null == excludeClassRegexs) { Set excludeClassRegexsTemp = new HashSet(); String defaultRegex = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX_DEFAULT); - if (null != defaultRegex && AgentUtils.isNotBlank(defaultRegex)) { + if (AgentUtils.isNotBlank(defaultRegex)) { excludeClassRegexsTemp.addAll(Arrays.asList(defaultRegex.split(";"))); } String excludeRegexStr = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX); - if (null != excludeRegexStr && AgentUtils.isNotBlank(excludeRegexStr)) { + if (AgentUtils.isNotBlank(excludeRegexStr)) { excludeClassRegexsTemp.addAll(Arrays.asList(excludeRegexStr.split(";"))); } excludeClassRegexs = excludeClassRegexsTemp; @@ -137,25 +137,26 @@ public static boolean isLogAvgExecuteTime() { /** * 是否开启pojo的监控 - * - * @return + * + * @return 是否开启pojo的监控 * @author dingjsh */ public static boolean isOpenPojoMonitor() { String value = getProperty(ConfigConsts.POJO_MONITOR_OPEN); return "true".equalsIgnoreCase(value); } - + /** * ConfigUtils + * + * @return 是否采用nanoTime来记录方法的执行时间 * @description 是否采用nanoTime来记录方法的执行时间 - * @return * @author dingjsh * @date 2018年5月25日 下午2:08:33 * @version 1.2.0 */ - public static boolean isUsingNanoTime(){ - String value = getProperty(ConfigConsts.LOG_TIME_NANO); + public static boolean isUsingNanoTime() { + String value = getProperty(ConfigConsts.LOG_TIME_NANO); return "true".equalsIgnoreCase(value); } } diff --git a/src/com/wenshuo/agent/ExecuteLogAnalyzer.java b/src/com/wenshuo/agent/ExecuteLogAnalyzer.java deleted file mode 100644 index 1d40630..0000000 --- a/src/com/wenshuo/agent/ExecuteLogAnalyzer.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * @(#)ExecuteLogAnalyzer.java 2015-8-3 上午09:15:41 - * javaagent - * Copyright 2015 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent; - -/** - * ExecuteLogAnalyzer,分析方法执行日志 - * - * @author dingjsh - * @time 2015-8-3上午09:15:41 - */ -public class ExecuteLogAnalyzer { - - /** - * 日志分析 - * @param logFileName 日志文件名 - * @param topExecuteCount 执行次数最多的top数 - * @param executeTimeThreshold 执行时间的阀值 - * @author dingjsh - * @time 2015-8-3上午09:18:18 - */ - public void analyze(String logFileName,int topExecuteCount,int executeTimeThreshold){ - - - - } - - - - public static void main(String[] args) { - - } - - - -} diff --git a/src/com/wenshuo/agent/NamedThreadFactory.java b/src/com/wenshuo/agent/NamedThreadFactory.java index 61c007d..6daceec 100644 --- a/src/com/wenshuo/agent/NamedThreadFactory.java +++ b/src/com/wenshuo/agent/NamedThreadFactory.java @@ -10,8 +10,6 @@ * @time 2016-5-19上午09:40:50 */ public class NamedThreadFactory implements ThreadFactory { - private static final AtomicInteger POOL_SEQ = new AtomicInteger(1); - private final AtomicInteger mThreadNum = new AtomicInteger(1); private final String mPrefix; @@ -20,14 +18,6 @@ public class NamedThreadFactory implements ThreadFactory { private final ThreadGroup mGroup; - public NamedThreadFactory() { - this("pool-" + POOL_SEQ.getAndIncrement(), false); - } - - public NamedThreadFactory(String prefix) { - this(prefix, false); - } - public NamedThreadFactory(String prefix, boolean daemon) { mPrefix = prefix + "-thread-"; mDaemon = daemon; @@ -42,8 +32,4 @@ public Thread newThread(Runnable runnable) { ret.setDaemon(mDaemon); return ret; } - - public ThreadGroup getThreadGroup() { - return mGroup; - } } \ No newline at end of file diff --git a/src/com/wenshuo/agent/PojoDetector.java b/src/com/wenshuo/agent/PojoDetector.java index ad471ca..48cf45c 100644 --- a/src/com/wenshuo/agent/PojoDetector.java +++ b/src/com/wenshuo/agent/PojoDetector.java @@ -20,11 +20,7 @@ * @time 2016-5-7下午04:18:14 */ public class PojoDetector { - -// private static final String[] ignoreMthods = new String[]{"toString","equals","hashCode","toJSONString"}; - - - + public static Set getPojoMethodNames(CtMethod[] methods){ Set pojoMethods = Collections.emptySet(); if(null != methods && methods.length>0){ diff --git a/src/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/com/wenshuo/agent/log/ExecuteLogUtils.java index 9b00887..0786543 100644 --- a/src/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -28,7 +28,7 @@ /** * ExecuteLogUtils - * + * * @author dingjsh * @time 2015-7-27下午05:57:01 */ @@ -40,11 +40,11 @@ public class ExecuteLogUtils { private static String logFileName = null; - private static long startTimemillis; + private static long startTimeMillis; private static ScheduledThreadPoolExecutor counterLogExecutor; - private static Map> exeuteCounterMap; + private static Map> executeCounterMap; private static final Object executeCounterLock = new Object(); @@ -82,53 +82,53 @@ public static synchronized void init() { } setNextDateStartTimeMillis(); initWriter(); - exeuteCounterMap = new ConcurrentHashMap>(); - startTimemillis = System.currentTimeMillis(); + executeCounterMap = new ConcurrentHashMap>(); + startTimeMillis = System.currentTimeMillis(); counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); inited = true; } - public static void log(String className, String methodName, long currentTimemillis, long executeTime) { + public static void log(String className, String methodName, long executeTime) { logExecuteCounter(className, methodName, executeTime); } /** * 输出方法执行记数日志 - * + * * @author dingjsh * @time 2015-7-28下午01:35:25 */ - public synchronized static void outputCounterLog() throws IOException { - Map> exeuteCounterMapInner = exeuteCounterMap; - exeuteCounterMap = new ConcurrentHashMap>(); - String startTime = foramteTimeMillis(startTimemillis); - String endTime = foramteTimeMillis(System.currentTimeMillis()); + synchronized static void outputCounterLog() throws IOException { + Map> executeCounterMapInner = executeCounterMap; + executeCounterMap = new ConcurrentHashMap>(); + String startTime = formatTimeMillis(startTimeMillis); + String endTime = formatTimeMillis(System.currentTimeMillis()); long byteLength = removeJSONArrayEndBracket(); if (0 == byteLength) { - writeLog("[",true, startTimemillis); + writeLog("[",true, startTimeMillis); } - Set>> entrySet = exeuteCounterMapInner.entrySet(); + Set>> entrySet = executeCounterMapInner.entrySet(); Iterator>> ite = entrySet.iterator(); int length = entrySet.size(); if (length > 0 && byteLength > 10) { // 说明文件不只是[],json数组中已经有内容 - writeLog(",", startTimemillis); + writeLog(",", startTimeMillis); } for (int index = 0; ite.hasNext(); index++) { Map.Entry> entry = ite.next(); String className = entry.getKey(); Map method2ExecuteMap = entry.getValue(); String methodExecuteJson = MethodExecuteJSONformatter.getMethodExecuteJSON(className, method2ExecuteMap, - startTime, endTime, isUsingNanoTime, logAvgExecuteTime); - writeLog(methodExecuteJson, startTimemillis); + startTime, endTime, isUsingNanoTime, logAvgExecuteTime); + writeLog(methodExecuteJson, startTimeMillis); if (index < length - 1) { - writeLog(",", true, startTimemillis); + writeLog(",", true, startTimeMillis); } } - writeLog("]", true,startTimemillis); + writeLog("]", true, startTimeMillis); flushLogAndClose(); - startTimemillis = System.currentTimeMillis(); + startTimeMillis = System.currentTimeMillis(); } private static void logExecuteCounter(String className, String methodName, long executeTime) { @@ -151,9 +151,9 @@ private static void logExecuteCounter(String className, String methodName, long } /** - * + * * ExecuteLogUtils - * + * * @description 获得class和它的调用次数映射关系，如果exeuteCounterMap中没有，则创建一个并放入 * @param className 类名 * @return class和它的调用次数映射关系 @@ -162,13 +162,13 @@ private static void logExecuteCounter(String className, String methodName, long * @version 1.2.0 */ private static Map getOrCreateClassExecutesMapping(String className) { - Map methodCounterMap = exeuteCounterMap.get(className); + Map methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { synchronized (executeCounterLock) { - methodCounterMap = exeuteCounterMap.get(className); + methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { methodCounterMap = new ConcurrentHashMap(); - exeuteCounterMap.put(className, methodCounterMap); + executeCounterMap.put(className, methodCounterMap); } } } @@ -230,7 +230,7 @@ private static void initWriter() { try { File logFile = getCounterLogFile(logFileName); counterLogWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(logFile, true), ENCODING), - BUFFER_SIZE); + BUFFER_SIZE); } catch (IOException e) { System.err.println(e); throw new RuntimeException("无法初始化【" + logFileName + "】,建议您检查磁盘空间，或者手动删除该日志文件"); @@ -243,7 +243,7 @@ private static File getCounterLogFile(String logFileName) throws IOException { int lastIndexOfDot = logFileName.lastIndexOf('.'); if (lastIndexOfDot > 0) { logFileName = logFileName.substring(0, lastIndexOfDot) + "." + logFileNameWithDate - + logFileName.substring(lastIndexOfDot); + + logFileName.substring(lastIndexOfDot); } else { logFileName = logFileName + "." + logFileNameWithDate + ".log"; } @@ -301,7 +301,7 @@ private static void setNextDateStartTimeMillis() { nextDayStartTimeMillis = startTime.getTime(); } - private static String foramteTimeMillis(long timeMillis) { + private static String formatTimeMillis(long timeMillis) { Date date = new Date(timeMillis); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(date); diff --git a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java index a35225a..a886f08 100644 --- a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java +++ b/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java @@ -1,49 +1,44 @@ package com.wenshuo.agent.log; -import java.util.Iterator; import java.util.Map; import java.util.concurrent.atomic.AtomicLong; /** - * * MethodExecuteJSONformatter - * - * @description 2.0.0 + * * @author dingjsh - * @date 2018年8月22日 下午8:07:01 * @version 2.0.0 + * @description 2.0.0 + * @date 2018年8月22日 下午8:07:01 */ class MethodExecuteJSONformatter { /** - * * MethodExecuteJSONformatter - * - * @description 将方法执行监控数据格式化为json string - * @param className 类名 + * + * @param className 类名 * @param method2ExecuteMap Map<方法名, AtomicLong[]> 数组第一个是执行次数，第二个是执行时间 - * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss - * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss + * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss + * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss * @return 格式化后的json string + * @description 将方法执行监控数据格式化为json string * @author dingjsh * @date 2018年8月22日 下午8:49:18 * @version 2.0.0 */ - public static String getMethodExecuteJSON(String className, Map method2ExecuteMap, - String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { + static String getMethodExecuteJSON(String className, Map method2ExecuteMap, + String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { StringBuilder json = new StringBuilder("{"); appendString(json, "class", className).append(","); appendString(json, "start", startTime).append(","); appendString(json, "end", endTime).append(","); appendKey(json, "methods").append("["); - Iterator> method2ExecuteIte = method2ExecuteMap.entrySet().iterator(); - while (method2ExecuteIte.hasNext()) { - Map.Entry methodEntry = method2ExecuteIte.next(); + for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { String methodName = methodEntry.getKey(); AtomicLong[] executeCounter = methodEntry.getValue(); long counter = executeCounter[0].longValue(); long timeInMillis - = isUsingNanoTime ? executeCounter[1].longValue() / 1000000 : executeCounter[1].longValue(); + = isUsingNanoTime ? executeCounter[1].longValue() / 1000000 : executeCounter[1].longValue(); json.append("{"); appendString(json, "name", methodName).append(","); appendLong(json, "counter", counter).append(","); diff --git a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java index 3eaf15d..23f54a9 100644 --- a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ b/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -40,7 +40,7 @@ public class AgentLogClassFileTransformer implements ClassFileTransformer { * byte[]) */ public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, - ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { + ProtectionDomain protectionDomain, byte[] classfileBuffer) { byte[] byteCode = classfileBuffer; className = className.replace('/', '.'); if (!isNeedLogExecuteInfo(className)) { @@ -56,7 +56,7 @@ public byte[] transform(ClassLoader loader, String className, Class classBein private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { try { ClassPool cp = ClassPool.getDefault(); - CtClass cc = null; + CtClass cc; try { cc = cp.get(className); } catch (NotFoundException e) { @@ -108,14 +108,14 @@ private void aopLog(String className, CtMethod m) throws CannotCompileException m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;"); m.insertAfter(LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() - + "\",java.lang.System.currentTimeMillis(),(long)dingjsh_javaagent_elapsedTime" + ");"); + + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); } /** * 是否需要记录执行信息 * - * @param className - * @return + * @param className 类名 + * @return 是否需要记录执行信息 * @author dingjsh * @time 2015-7-27下午06:11:02 */ From fc2e2bbc66726e53d0467f6470056b865e041b05 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Wed, 25 Aug 2021 14:29:55 +0800 Subject: [PATCH 11/25] fix typo --- src/com/wenshuo/agent/log/ExecuteLogUtils.java | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/com/wenshuo/agent/log/ExecuteLogUtils.java index 0786543..ac2851f 100644 --- a/src/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -56,7 +56,7 @@ public class ExecuteLogUtils { private static boolean logAvgExecuteTime = false; - private static boolean inited = false; + private static volatile boolean isInitialized = false; private ExecuteLogUtils() { super(); @@ -69,7 +69,7 @@ private ExecuteLogUtils() { * @time 2015-7-30上午10:47:58 */ public static synchronized void init() { - if (inited) { + if (isInitialized) { return; } logFileName = ConfigUtils.getLogFileName(); @@ -86,7 +86,7 @@ public static synchronized void init() { startTimeMillis = System.currentTimeMillis(); counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); - inited = true; + isInitialized = true; } public static void log(String className, String methodName, long executeTime) { From 0746419348a7b1527c9822e163cb332ae2b10f3d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Wed, 25 Aug 2021 14:58:57 +0800 Subject: [PATCH 12/25] =?UTF-8?q?=E5=B0=86synchonized=E5=92=8CAtomicLong?= =?UTF-8?q?=E7=9B=B4=E6=8E=A5=E6=94=B9=E4=B8=BA=E6=97=A0=E9=94=81=EF=BC=8C?= =?UTF-8?q?=E7=89=BA=E7=89=B2=E4=B8=80=E4=BA=9B=E7=BB=9F=E8=AE=A1=E6=95=B0?= =?UTF-8?q?=E6=8D=AE=E5=87=86=E7=A1=AE=E6=80=A7=E5=B8=A6=E6=9D=A5=E6=80=A7?= =?UTF-8?q?=E8=83=BD=E6=8F=90=E5=8D=87=E5=92=8C=E5=87=8F=E4=BD=8E=E5=86=85?= =?UTF-8?q?=E5=AD=98=E6=B6=88=E8=80=97?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../wenshuo/agent/log/ExecuteLogUtils.java | 50 ++++++++----------- .../agent/log/MethodExecuteJSONformatter.java | 14 +++--- 2 files changed, 28 insertions(+), 36 deletions(-) diff --git a/src/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/com/wenshuo/agent/log/ExecuteLogUtils.java index ac2851f..a5633c6 100644 --- a/src/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -20,7 +20,6 @@ import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; -import java.util.concurrent.atomic.AtomicLong; import com.wenshuo.agent.AgentUtils; import com.wenshuo.agent.ConfigUtils; @@ -44,7 +43,7 @@ public class ExecuteLogUtils { private static ScheduledThreadPoolExecutor counterLogExecutor; - private static Map> executeCounterMap; + private static ConcurrentHashMap> executeCounterMap; private static final Object executeCounterLock = new Object(); @@ -82,7 +81,7 @@ public static synchronized void init() { } setNextDateStartTimeMillis(); initWriter(); - executeCounterMap = new ConcurrentHashMap>(); + executeCounterMap = new ConcurrentHashMap>(); startTimeMillis = System.currentTimeMillis(); counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); @@ -99,26 +98,26 @@ public static void log(String className, String methodName, long executeTime) { * @author dingjsh * @time 2015-7-28下午01:35:25 */ - synchronized static void outputCounterLog() throws IOException { - Map> executeCounterMapInner = executeCounterMap; - executeCounterMap = new ConcurrentHashMap>(); + synchronized static void outputCounterLog() throws IOException { + ConcurrentHashMap> executeCounterMapInner = executeCounterMap; + executeCounterMap = new ConcurrentHashMap>(); String startTime = formatTimeMillis(startTimeMillis); String endTime = formatTimeMillis(System.currentTimeMillis()); long byteLength = removeJSONArrayEndBracket(); if (0 == byteLength) { - writeLog("[",true, startTimeMillis); + writeLog("[", true, startTimeMillis); } - Set>> entrySet = executeCounterMapInner.entrySet(); - Iterator>> ite = entrySet.iterator(); + Set>> entrySet = executeCounterMapInner.entrySet(); + Iterator>> ite = entrySet.iterator(); int length = entrySet.size(); if (length > 0 && byteLength > 10) { // 说明文件不只是[],json数组中已经有内容 writeLog(",", startTimeMillis); } for (int index = 0; ite.hasNext(); index++) { - Map.Entry> entry = ite.next(); + Map.Entry> entry = ite.next(); String className = entry.getKey(); - Map method2ExecuteMap = entry.getValue(); + Map method2ExecuteMap = entry.getValue(); String methodExecuteJson = MethodExecuteJSONformatter.getMethodExecuteJSON(className, method2ExecuteMap, startTime, endTime, isUsingNanoTime, logAvgExecuteTime); writeLog(methodExecuteJson, startTimeMillis); @@ -132,42 +131,35 @@ synchronized static void outputCounterLog() throws IOException { } private static void logExecuteCounter(String className, String methodName, long executeTime) { - Map methodCounterMap = getOrCreateClassExecutesMapping(className); - AtomicLong[] counter = methodCounterMap.get(methodName); + // dingjs modfied in 20210825 原来是用锁和Atomiclong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 + // 数据有一些误差，这个误差对于agent数据监控并没有什么影响，牺牲一定的准确性带来性能的提升是有必要的 + ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); + long[] counter = methodCounterMap.get(methodName); if (null == counter) { - synchronized (methodCounterMap) { - counter = methodCounterMap.get(methodName); - if (null == counter) { - methodCounterMap.put(methodName, new AtomicLong[] {new AtomicLong(1), new AtomicLong(executeTime)}); - } else { - counter[0].incrementAndGet(); - counter[1].addAndGet(executeTime); - } - } + methodCounterMap.put(methodName, new long[]{1, executeTime}); } else { - counter[0].incrementAndGet(); - counter[1].addAndGet(executeTime); + counter[0]++; + counter[1] = executeTime + counter[1]; } } /** - * * ExecuteLogUtils * - * @description 获得class和它的调用次数映射关系，如果exeuteCounterMap中没有，则创建一个并放入 * @param className 类名 * @return class和它的调用次数映射关系 + * @description 获得class和它的调用次数映射关系，如果exeuteCounterMap中没有，则创建一个并放入 * @author dingjsh * @date 2018年5月25日 下午4:40:33 * @version 1.2.0 */ - private static Map getOrCreateClassExecutesMapping(String className) { - Map methodCounterMap = executeCounterMap.get(className); + private static ConcurrentHashMap getOrCreateClassExecutesMapping(String className) { + ConcurrentHashMap methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { synchronized (executeCounterLock) { methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { - methodCounterMap = new ConcurrentHashMap(); + methodCounterMap = new ConcurrentHashMap(); executeCounterMap.put(className, methodCounterMap); } } diff --git a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java index a886f08..13e1454 100644 --- a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java +++ b/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java @@ -1,7 +1,7 @@ package com.wenshuo.agent.log; import java.util.Map; -import java.util.concurrent.atomic.AtomicLong; + /** * MethodExecuteJSONformatter @@ -17,7 +17,7 @@ class MethodExecuteJSONformatter { * MethodExecuteJSONformatter * * @param className 类名 - * @param method2ExecuteMap Map<方法名, AtomicLong[]> 数组第一个是执行次数，第二个是执行时间 + * @param method2ExecuteMap Map<方法名, Long[]> 数组第一个是执行次数，第二个是执行时间 * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss * @return 格式化后的json string @@ -26,19 +26,19 @@ class MethodExecuteJSONformatter { * @date 2018年8月22日 下午8:49:18 * @version 2.0.0 */ - static String getMethodExecuteJSON(String className, Map method2ExecuteMap, + static String getMethodExecuteJSON(String className, Map method2ExecuteMap, String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { StringBuilder json = new StringBuilder("{"); appendString(json, "class", className).append(","); appendString(json, "start", startTime).append(","); appendString(json, "end", endTime).append(","); appendKey(json, "methods").append("["); - for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { + for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { String methodName = methodEntry.getKey(); - AtomicLong[] executeCounter = methodEntry.getValue(); - long counter = executeCounter[0].longValue(); + long[] executeCounter = methodEntry.getValue(); + long counter = executeCounter[0]; long timeInMillis - = isUsingNanoTime ? executeCounter[1].longValue() / 1000000 : executeCounter[1].longValue(); + = isUsingNanoTime ? executeCounter[1] / 1000000 : executeCounter[1]; json.append("{"); appendString(json, "name", methodName).append(","); appendLong(json, "counter", counter).append(","); From 92d6518297a98773ca97a34130aadc5adc41121c Mon Sep 17 00:00:00 2001 From: dingjs Date: Thu, 26 Aug 2021 18:47:09 +0800 Subject: [PATCH 13/25] Create LICENSE --- LICENSE | 201 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 LICENSE diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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From d2b0f469c12973eea40edeaea66df3f9f9e0236c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Fri, 12 Aug 2022 11:42:01 +0800 Subject: [PATCH 14/25] fix p3c tips --- .../wenshuo/agent/log/ExecuteLogUtils.java | 2 +- .../AgentLogClassFileTransformer.java | 29 +++++++------------ 2 files changed, 11 insertions(+), 20 deletions(-) diff --git a/src/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/com/wenshuo/agent/log/ExecuteLogUtils.java index a5633c6..c1f9678 100644 --- a/src/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -131,7 +131,7 @@ synchronized static void outputCounterLog() throws IOException { } private static void logExecuteCounter(String className, String methodName, long executeTime) { - // dingjs modfied in 20210825 原来是用锁和Atomiclong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 + // dingjs modified in 20210825 原来是用锁和AtomicLong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 // 数据有一些误差，这个误差对于agent数据监控并没有什么影响，牺牲一定的准确性带来性能的提升是有必要的 ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); long[] counter = methodCounterMap.get(methodName); diff --git a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java index 23f54a9..6343783 100644 --- a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ b/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -1,13 +1,7 @@ package com.wenshuo.agent.transformer; -import java.io.IOException; -import java.lang.instrument.ClassFileTransformer; -import java.lang.instrument.IllegalClassFormatException; -import java.security.ProtectionDomain; -import java.util.Collections; -import java.util.Set; -import java.util.regex.Pattern; - +import com.wenshuo.agent.ConfigUtils; +import com.wenshuo.agent.PojoDetector; import com.wenshuo.agent.javassist.CannotCompileException; import com.wenshuo.agent.javassist.ClassPool; import com.wenshuo.agent.javassist.CtClass; @@ -15,9 +9,12 @@ import com.wenshuo.agent.javassist.LoaderClassPath; import com.wenshuo.agent.javassist.Modifier; import com.wenshuo.agent.javassist.NotFoundException; - -import com.wenshuo.agent.ConfigUtils; -import com.wenshuo.agent.PojoDetector; +import java.io.IOException; +import java.lang.instrument.ClassFileTransformer; +import java.security.ProtectionDomain; +import java.util.Collections; +import java.util.Set; +import java.util.regex.Pattern; /** * AgentLogClassFileTransformer 类增强，增加agent日志 @@ -31,14 +28,8 @@ public class AgentLogClassFileTransformer implements ClassFileTransformer { private static final String AGENT_PACKAGE_NAME = "com.wenshuo.agent"; - /* - * (non-Javadoc) - * - * @see - * java.lang.instrument.ClassFileTransformer#transform(java.lang.ClassLoader - * , java.lang.String, java.lang.Class, java.security.ProtectionDomain, - * byte[]) - */ + + @Override public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) { byte[] byteCode = classfileBuffer; From dcb7248efabd4a9e40787a9ff3ed2364aa69e9f9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Mon, 16 Oct 2023 10:12:38 +0800 Subject: [PATCH 15/25] =?UTF-8?q?=E4=BF=AE=E6=94=B9javaagent=E5=8C=85?= =?UTF-8?q?=E7=BB=93=E6=9E=84=E4=B8=BAjava=E9=A1=B9=E7=9B=AE=E9=BB=98?= =?UTF-8?q?=E8=AE=A4=E5=8C=85=E7=BB=93=E6=9E=84?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 1 + pom.xml | 206 +- resources/JQL/JQL.py | 601 ----- resources/JQL/JQLCore.py | 107 - resources/JQL/Readme | 41 - resources/images/JQL.png | Bin 99371 -> 0 bytes src/.gitignore | 18 - src/com/wenshuo/agent/Agent.java | 26 - src/com/wenshuo/agent/AgentUtils.java | 180 -- src/com/wenshuo/agent/ConfigConsts.java | 39 - src/com/wenshuo/agent/ConfigUtils.java | 162 -- src/com/wenshuo/agent/NamedThreadFactory.java | 35 - src/com/wenshuo/agent/PojoDetector.java | 65 - .../agent/javassist/ByteArrayClassPath.java | 99 - .../javassist/CannotCompileException.java | 120 - .../agent/javassist/ClassClassPath.java | 97 - src/com/wenshuo/agent/javassist/ClassMap.java | 173 -- .../wenshuo/agent/javassist/ClassPath.java | 68 - .../wenshuo/agent/javassist/ClassPool.java | 1233 ---------- .../agent/javassist/ClassPoolTail.java | 430 ---- .../agent/javassist/CodeConverter.java | 809 ------- src/com/wenshuo/agent/javassist/CtArray.java | 113 - .../wenshuo/agent/javassist/CtBehavior.java | 1219 ---------- src/com/wenshuo/agent/javassist/CtClass.java | 1595 ------------- .../wenshuo/agent/javassist/CtClassType.java | 1761 --------------- .../agent/javassist/CtConstructor.java | 403 ---- src/com/wenshuo/agent/javassist/CtField.java | 1406 ------------ src/com/wenshuo/agent/javassist/CtMember.java | 319 --- src/com/wenshuo/agent/javassist/CtMethod.java | 438 ---- .../wenshuo/agent/javassist/CtNewClass.java | 126 -- .../agent/javassist/CtNewConstructor.java | 319 --- .../wenshuo/agent/javassist/CtNewMethod.java | 478 ---- .../agent/javassist/CtNewNestedClass.java | 67 - .../javassist/CtNewWrappedConstructor.java | 103 - .../agent/javassist/CtNewWrappedMethod.java | 199 -- .../agent/javassist/CtPrimitiveType.java | 112 - src/com/wenshuo/agent/javassist/Loader.java | 430 ---- .../agent/javassist/LoaderClassPath.java | 96 - src/com/wenshuo/agent/javassist/Modifier.java | 219 -- .../agent/javassist/NotFoundException.java | 30 - .../agent/javassist/SerialVersionUID.java | 213 -- .../wenshuo/agent/javassist/Translator.java | 71 - .../wenshuo/agent/javassist/URLClassPath.java | 179 -- .../agent/javassist/bytecode/AccessFlag.java | 134 -- .../bytecode/AnnotationDefaultAttribute.java | 160 -- .../bytecode/AnnotationsAttribute.java | 732 ------ .../javassist/bytecode/AttributeInfo.java | 303 --- .../agent/javassist/bytecode/BadBytecode.java | 40 - .../bytecode/BootstrapMethodsAttribute.java | 123 - .../agent/javassist/bytecode/ByteArray.java | 77 - .../agent/javassist/bytecode/ByteStream.java | 194 -- .../agent/javassist/bytecode/Bytecode.java | 1459 ------------ .../agent/javassist/bytecode/ClassFile.java | 932 -------- .../javassist/bytecode/ClassFilePrinter.java | 153 -- .../javassist/bytecode/ClassFileWriter.java | 791 ------- .../javassist/bytecode/CodeAnalyzer.java | 267 --- .../javassist/bytecode/CodeAttribute.java | 595 ----- .../javassist/bytecode/CodeIterator.java | 1604 ------------- .../agent/javassist/bytecode/ConstPool.java | 1995 ----------------- .../javassist/bytecode/ConstantAttribute.java | 73 - .../bytecode/DeprecatedAttribute.java | 56 - .../agent/javassist/bytecode/Descriptor.java | 872 ------- .../bytecode/DuplicateMemberException.java | 31 - .../bytecode/EnclosingMethodAttribute.java | 142 -- .../javassist/bytecode/ExceptionTable.java | 281 --- .../bytecode/ExceptionsAttribute.java | 174 -- .../agent/javassist/bytecode/FieldInfo.java | 276 --- .../bytecode/InnerClassesAttribute.java | 242 -- .../bytecode/InstructionPrinter.java | 295 --- .../bytecode/LineNumberAttribute.java | 182 -- .../bytecode/LocalVariableAttribute.java | 334 --- .../bytecode/LocalVariableTypeAttribute.java | 63 - .../agent/javassist/bytecode/LongVector.java | 64 - .../agent/javassist/bytecode/MethodInfo.java | 566 ----- .../bytecode/MethodParametersAttribute.java | 87 - .../agent/javassist/bytecode/Mnemonic.java | 239 -- .../agent/javassist/bytecode/Opcode.java | 449 ---- .../ParameterAnnotationsAttribute.java | 215 -- .../bytecode/SignatureAttribute.java | 1160 ---------- .../bytecode/SourceFileAttribute.java | 71 - .../agent/javassist/bytecode/StackMap.java | 576 ----- .../javassist/bytecode/StackMapTable.java | 1049 --------- .../bytecode/SyntheticAttribute.java | 56 - .../bytecode/TypeAnnotationsAttribute.java | 360 --- .../javassist/bytecode/analysis/Analyzer.java | 423 ---- .../bytecode/analysis/ControlFlow.java | 504 ----- .../javassist/bytecode/analysis/Executor.java | 1047 --------- .../javassist/bytecode/analysis/Frame.java | 289 --- .../bytecode/analysis/FramePrinter.java | 148 -- .../javassist/bytecode/analysis/IntQueue.java | 57 - .../bytecode/analysis/MultiArrayType.java | 130 -- .../bytecode/analysis/MultiType.java | 314 --- .../bytecode/analysis/Subroutine.java | 67 - .../bytecode/analysis/SubroutineScanner.java | 157 -- .../javassist/bytecode/analysis/Type.java | 593 ----- .../javassist/bytecode/analysis/Util.java | 48 - .../javassist/bytecode/analysis/package.html | 20 - .../bytecode/annotation/Annotation.java | 348 --- .../bytecode/annotation/AnnotationImpl.java | 305 --- .../annotation/AnnotationMemberValue.java | 96 - .../annotation/AnnotationsWriter.java | 354 --- .../bytecode/annotation/ArrayMemberValue.java | 145 -- .../annotation/BooleanMemberValue.java | 103 - .../bytecode/annotation/ByteMemberValue.java | 103 - .../bytecode/annotation/CharMemberValue.java | 104 - .../bytecode/annotation/ClassMemberValue.java | 140 -- .../annotation/DoubleMemberValue.java | 105 - .../bytecode/annotation/EnumMemberValue.java | 126 -- .../bytecode/annotation/FloatMemberValue.java | 105 - .../annotation/IntegerMemberValue.java | 110 - .../bytecode/annotation/LongMemberValue.java | 104 - .../bytecode/annotation/MemberValue.java | 89 - .../annotation/MemberValueVisitor.java | 39 - .../bytecode/annotation/NoSuchClassError.java | 40 - .../bytecode/annotation/ShortMemberValue.java | 104 - .../annotation/StringMemberValue.java | 104 - .../annotation/TypeAnnotationsWriter.java | 174 -- .../bytecode/annotation/package.html | 8 - .../agent/javassist/bytecode/package.html | 18 - .../bytecode/stackmap/BasicBlock.java | 411 ---- .../javassist/bytecode/stackmap/MapMaker.java | 606 ----- .../javassist/bytecode/stackmap/Tracer.java | 933 -------- .../javassist/bytecode/stackmap/TypeData.java | 785 ------- .../javassist/bytecode/stackmap/TypeTag.java | 30 - .../bytecode/stackmap/TypedBlock.java | 234 -- .../javassist/compiler/AccessorMaker.java | 260 --- .../agent/javassist/compiler/CodeGen.java | 1955 ---------------- .../javassist/compiler/CompileError.java | 53 - .../agent/javassist/compiler/Javac.java | 610 ----- .../agent/javassist/compiler/JvstCodeGen.java | 710 ------ .../javassist/compiler/JvstTypeChecker.java | 282 --- .../javassist/compiler/KeywordTable.java | 33 - .../wenshuo/agent/javassist/compiler/Lex.java | 551 ----- .../javassist/compiler/MemberCodeGen.java | 1160 ---------- .../javassist/compiler/MemberResolver.java | 617 ----- .../javassist/compiler/NoFieldException.java | 40 - .../agent/javassist/compiler/Parser.java | 1345 ----------- .../javassist/compiler/ProceedHandler.java | 30 - .../agent/javassist/compiler/SymbolTable.java | 45 - .../agent/javassist/compiler/SyntaxError.java | 23 - .../agent/javassist/compiler/TokenId.java | 125 -- .../agent/javassist/compiler/TypeChecker.java | 1044 --------- .../agent/javassist/compiler/ast/ASTList.java | 160 -- .../agent/javassist/compiler/ast/ASTree.java | 59 - .../javassist/compiler/ast/ArrayInit.java | 32 - .../javassist/compiler/ast/AssignExpr.java | 41 - .../agent/javassist/compiler/ast/BinExpr.java | 42 - .../javassist/compiler/ast/CallExpr.java | 47 - .../javassist/compiler/ast/CastExpr.java | 56 - .../javassist/compiler/ast/CondExpr.java | 44 - .../javassist/compiler/ast/Declarator.java | 128 -- .../javassist/compiler/ast/DoubleConst.java | 95 - .../agent/javassist/compiler/ast/Expr.java | 85 - .../javassist/compiler/ast/FieldDecl.java | 35 - .../compiler/ast/InstanceOfExpr.java | 40 - .../javassist/compiler/ast/IntConst.java | 139 -- .../agent/javassist/compiler/ast/Keyword.java | 36 - .../agent/javassist/compiler/ast/Member.java | 40 - .../javassist/compiler/ast/MethodDecl.java | 46 - .../agent/javassist/compiler/ast/NewExpr.java | 78 - .../agent/javassist/compiler/ast/Pair.java | 52 - .../agent/javassist/compiler/ast/Stmnt.java | 60 - .../agent/javassist/compiler/ast/StringL.java | 36 - .../agent/javassist/compiler/ast/Symbol.java | 36 - .../javassist/compiler/ast/Variable.java | 39 - .../agent/javassist/compiler/ast/Visitor.java | 52 - .../convert/TransformAccessArrayField.java | 270 --- .../javassist/convert/TransformAfter.java | 47 - .../javassist/convert/TransformBefore.java | 108 - .../javassist/convert/TransformCall.java | 130 -- .../convert/TransformFieldAccess.java | 82 - .../agent/javassist/convert/TransformNew.java | 103 - .../javassist/convert/TransformNewClass.java | 83 - .../javassist/convert/TransformReadField.java | 96 - .../convert/TransformWriteField.java | 72 - .../agent/javassist/convert/Transformer.java | 57 - .../wenshuo/agent/javassist/expr/Cast.java | 166 -- .../agent/javassist/expr/ConstructorCall.java | 70 - .../wenshuo/agent/javassist/expr/Expr.java | 330 --- .../agent/javassist/expr/ExprEditor.java | 317 --- .../agent/javassist/expr/FieldAccess.java | 325 --- .../wenshuo/agent/javassist/expr/Handler.java | 146 -- .../agent/javassist/expr/Instanceof.java | 170 -- .../agent/javassist/expr/MethodCall.java | 247 -- .../agent/javassist/expr/NewArray.java | 283 --- .../wenshuo/agent/javassist/expr/NewExpr.java | 249 -- .../wenshuo/agent/javassist/expr/package.html | 8 - src/com/wenshuo/agent/javassist/package.html | 22 - .../agent/javassist/runtime/Cflow.java | 53 - .../wenshuo/agent/javassist/runtime/Desc.java | 161 -- .../agent/javassist/runtime/DotClass.java | 29 - .../agent/javassist/runtime/Inner.java | 25 - .../agent/javassist/runtime/package.html | 12 - .../javassist/scopedpool/ScopedClassPool.java | 309 --- .../scopedpool/ScopedClassPoolFactory.java | 39 - .../ScopedClassPoolFactoryImpl.java | 43 - .../scopedpool/ScopedClassPoolRepository.java | 98 - .../ScopedClassPoolRepositoryImpl.java | 188 -- .../scopedpool/SoftValueHashMap.java | 233 -- .../agent/javassist/scopedpool/package.html | 7 - .../agent/javassist/tools/Callback.java | 152 -- .../wenshuo/agent/javassist/tools/Dump.java | 58 - .../agent/javassist/tools/framedump.java | 48 - .../agent/javassist/tools/package.html | 6 - .../tools/reflect/CannotCreateException.java | 30 - .../tools/reflect/CannotInvokeException.java | 69 - .../tools/reflect/CannotReflectException.java | 35 - .../tools/reflect/ClassMetaobject.java | 370 --- .../javassist/tools/reflect/Compiler.java | 163 -- .../agent/javassist/tools/reflect/Loader.java | 162 -- .../javassist/tools/reflect/Metalevel.java | 39 - .../javassist/tools/reflect/Metaobject.java | 239 -- .../javassist/tools/reflect/Reflection.java | 403 ---- .../agent/javassist/tools/reflect/Sample.java | 57 - .../javassist/tools/reflect/package.html | 35 - .../javassist/tools/rmi/AppletServer.java | 251 --- .../javassist/tools/rmi/ObjectImporter.java | 299 --- .../tools/rmi/ObjectNotFoundException.java | 27 - .../agent/javassist/tools/rmi/Proxy.java | 26 - .../javassist/tools/rmi/RemoteException.java | 31 - .../agent/javassist/tools/rmi/RemoteRef.java | 36 - .../agent/javassist/tools/rmi/Sample.java | 37 - .../javassist/tools/rmi/StubGenerator.java | 256 --- .../agent/javassist/tools/rmi/package.html | 16 - .../javassist/tools/web/BadHttpRequest.java | 35 - .../agent/javassist/tools/web/Viewer.java | 209 -- .../agent/javassist/tools/web/Webserver.java | 408 ---- .../agent/javassist/tools/web/package.html | 7 - .../agent/javassist/util/HotSwapper.java | 251 --- .../wenshuo/agent/javassist/util/package.html | 5 - .../javassist/util/proxy/FactoryHelper.java | 237 -- .../javassist/util/proxy/MethodFilter.java | 31 - .../javassist/util/proxy/MethodHandler.java | 49 - .../agent/javassist/util/proxy/Proxy.java | 33 - .../javassist/util/proxy/ProxyFactory.java | 1446 ------------ .../javassist/util/proxy/ProxyObject.java | 44 - .../util/proxy/ProxyObjectInputStream.java | 100 - .../util/proxy/ProxyObjectOutputStream.java | 72 - .../javassist/util/proxy/RuntimeSupport.java | 271 --- .../javassist/util/proxy/SecurityActions.java | 136 -- .../javassist/util/proxy/SerializedProxy.java | 99 - .../agent/javassist/util/proxy/package.html | 6 - .../wenshuo/agent/log/ExecuteLogUtils.java | 316 --- .../agent/log/MethodExecuteJSONformatter.java | 70 - .../wenshuo/agent/log/OutputLogRunnable.java | 31 - .../AgentLogClassFileTransformer.java | 156 -- src/props/agent.properties | 16 - test/com/wenshuo/agent/test/TestCtMethod.java | 50 - 248 files changed, 20 insertions(+), 63340 deletions(-) delete mode 100644 resources/JQL/JQL.py delete mode 100644 resources/JQL/JQLCore.py delete mode 100644 resources/JQL/Readme delete mode 100644 resources/images/JQL.png delete mode 100644 src/.gitignore delete mode 100644 src/com/wenshuo/agent/Agent.java delete mode 100644 src/com/wenshuo/agent/AgentUtils.java delete mode 100644 src/com/wenshuo/agent/ConfigConsts.java delete mode 100644 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src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java delete mode 100644 src/props/agent.properties delete mode 100644 test/com/wenshuo/agent/test/TestCtMethod.java diff --git a/.gitignore b/.gitignore index 1dd8028..3a8beb1 100644 --- a/.gitignore +++ b/.gitignore @@ -7,6 +7,7 @@ *.jar *.war *.ear +javaagent.iml # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml hs_err_pid* diff --git a/pom.xml b/pom.xml index 4e771ad..4bc2299 100644 --- a/pom.xml +++ b/pom.xml @@ -4,12 +4,17 @@ com.wenshuo javaagent - 2.1.1 + 2.1.2 jar + javaagent + 基于javaagent技术来记录方法执行次数和时间 + https://github.com/dingjs/javaagent + UTF-8 1.6 + UTF-8 @@ -27,203 +32,30 @@ - src - target/classes - - - src - - **/*.java - - - - - test - - - test - - **/*.java - - - org.apache.maven.plugins maven-jar-plugin - - - process-classes - - jar - - - - - com.wenshuo.agent.Agent - - - - - + 3.3.0 + + + + com.wenshuo.agent.Agent + + + org.apache.maven.plugins maven-compiler-plugin - - - org.codehaus.mojo - buildnumber-maven-plugin - - - org.apache.maven.plugins - maven-source-plugin - - - attach-sources - - jar - - - - - - org.apache.maven.plugins - maven-dependency-plugin - - - org.codehaus.mojo - sonar-maven-plugin + + 6 + 6 + - - - - org.codehaus.mojo - sonar-maven-plugin - 2.0 - - - org.apache.maven.plugins - maven-compiler-plugin - 2.3.2 - - ${project.build.target} - ${project.build.target} - ${project.build.sourceEncoding} - - - - org.apache.maven.plugins - maven-dependency-plugin - 2.1 - - false - runtime - true - false - false - - - - org.apache.maven.plugins - maven-deploy-plugin - 2.4 - - - org.apache.maven.plugins - maven-source-plugin - 2.0.4 - - true - - - - org.apache.maven.plugins - maven-jar-plugin - 2.2 - - - default-jar - - - - - - - - true - - - ${buildNumber} - ${project.build.target} - - - - - - org.apache.maven.plugins - maven-assembly-plugin - 2.3 - - - - ${project.version} - ${project.artifactId} - - true - - - - - org.apache.maven.plugins - maven-surefire-plugin - 2.4.3 - - - org.apache.maven.plugins - maven-help-plugin - 2.0 - - - org.apache.maven.plugins - maven-install-plugin - 2.2 - - - org.apache.maven.plugins - maven-clean-plugin - 2.3 - - - org.codehaus.mojo - buildnumber-maven-plugin - 1.0-beta-2 - - - validate - - create - - - - - {0,date,yyyy-MM-dd HH:mm:ss} - - timestamp - - - - - org.apache.maven.plugins - maven-shade-plugin - 1.4 - - - - com.sun @@ -236,7 +68,7 @@ junit junit - 4.12 + 4.13.2 test diff --git a/resources/JQL/JQL.py b/resources/JQL/JQL.py deleted file mode 100644 index d1210df..0000000 --- a/resources/JQL/JQL.py +++ /dev/null @@ -1,601 +0,0 @@ -#coding=utf-8 -import re, io, os, sys, time -from JQLCore import AgentLogTableTitles, ColumnDefinition, QueryDefinition -from JQLCore import CompareItem, JQL_COMPARE, SortItem - - -START_TIME_PATTERN = re.compile(r"startTime:{.*}") -END_TIME_PATTERN = re.compile(r"endTime:{.*}") -CLASS_NAME_PATTERN = re.compile(r"className:{.*}") -METHOD_NAME_PATTERN = re.compile(r"methodName:.*") -COUNTER_PATTERN = re.compile(r"counter.*") -TIME_PATTERN = re.compile(r"time.*") -EARLIEST_TIME = time.strptime('1970-01-01 12:00:00', '%Y-%m-%d %H:%M:%S') -JQL_SPLIT_KEY = r"select|from|where|order by|limit|;" -ORDER_PATTERN = re.compile(r"asc|desc") - -def checkJQL(jql): - """校验jql - - 校验规则： - 1. 关键字顺序必须为：select, from, where, order by, limit - 2. from为必填项 - """ - - if len(jql.strip()) == 0: - raise Exception("JQL empty error") - - max = -1 - pos = jql.find("select") - if pos != -1: - if pos > max: - max = pos - else: - raise Exception('select order error') - - pos = jql.find("from") - if pos != -1: - if pos > max: - max = pos - else: - raise Exception('from order error') - else: - raise Exception('no from error') - - pos = jql.find("where") - if pos != -1: - if pos > max: - max = pos - else: - raise Exception('where order error') - - pos = jql.find("order by") - if pos != -1: - if pos > max: - max = pos - else: - raise Exception('order by order error') - - pos = jql.find("limit") - if pos != -1: - if pos > max: - max = pos - else: - raise Exception('limit order error') - -def parseJQL(jql): - """解析查询语句 - - Args: - jql: 查询语句 - Return: - QueryDefinition: 解析查询语句得到的定义 - """ - - #分片 - segments = re.split(JQL_SPLIT_KEY, jql) - - i = 1 - #处理select - titleList = [] - if jql.find("select") != -1: - selectStr = segments[i].strip() - i += 1 - - if len(selectStr) == 0: - raise Exception('select no values error') - - for title in selectStr.split(","): - title = title.strip() - - if len(title) == 0: - raise Exception('selct empty value error: select ' + selectStr) - - if title not in AgentLogTableTitles: - raise Exception('select value error:\'' + title + '\'') - - titleList.append(title) - else: - # 默认表头 - titleList = AgentLogTableTitles - - #处理from - fileList = [] - if jql.find("from") != -1: - fromStr = segments[i].strip() - i += 1 - - if len(fromStr) == 0: - raise Exception('from no values error') - - for root in fromStr.split(","): - root = root.strip() - if len(root) == 0: - raise Exception('from empty value error: where ' + fromStr) - - if os.path.isdir(root): - files = os.listdir(root) - for file in files: - fileList.append(os.path.join(root, file)) - elif os.path.isfile(root): - fileList.append(root) - else: - raise Exception('from value error: ' + root + ' is not a file or dir') - else: - raise Exception('no from error') - - #处理where - encoding = "utf-8" - compareList = [] - if jql.find("where") != -1: - whereStr = segments[i].strip() - i += 1 - - if len(whereStr) == 0: - raise Exception('where no values error') - - #得到文件编码、过滤条件 - filterList = [] - for param in whereStr.split("and"): - elements = param.split('=') - key = elements[0].strip() - if key == "encoding": - encoding = elements[1].strip() - else: - filterList.append(param) - - #根据过滤得到比较列表 - for filter in filterList: - operator = None - if filter.find(">=") != -1: - operator = ">=" - elif filter.find("<=") != -1: - operator = "<=" - elif filter.find("=") != -1: - operator = "=" - elif filter.find(">") != -1: - operator = ">" - elif filter.find("<") != -1: - operator = "<" - else: - continue - - elements = filter.split(operator) - if len(elements) != 2: - continue - - ci = CompareItem(elements[0].strip(), operator, elements[1].strip()) - compareList.append(ci) - - #处理order by - keyList = [] - orderList = [] - if jql.find("order by") != -1: - orderByStr = segments[i].strip() - i += 1 - - if len(fromStr) == 0: - raise Exception('order by no values error') - - for order in orderByStr.split(","): - order = order.strip() - - if len(order) == 0: - raise Exception('order by empty values error') - else: - pos = re.search(ORDER_PATTERN, order) - key = None - keyOrder = None - if pos is None: - # 默认升序 - key = order - keyOrder = "asc" - else: - key = order[: pos.start()].strip() - keyOrder = order[pos.start() : pos.end()] - - if key not in AgentLogTableTitles: - raise Exception('order by no support key error. key = ' + key) - - keyList.append(key) - orderList.append(keyOrder) - - #处理limit - limit = -1 - if jql.find("limit") != -1: - limitStr = segments[i].strip() - i += 1 - - if len(limitStr) == 0: - raise Exception('limit no values error') - - if limitStr.isdigit() == False: - raise Exception("limit value type error, value must be a nonnegative integer , value = " + limitStr) - - limit = limitStr - - return QueryDefinition(titleList, fileList, encoding, keyList, orderList, compareList, limit) - -def getValueInBrackets(str): - """得到括号内的值 - - Args: - str: 包括{}的字符串 - - Return: - {}内的值(去除了2端的空格) - """ - - return getValueBetweenKey1AndKey2(str, "{", "}") - -def getValueBetweenKey1AndKey2(str, key1, key2): - """得到关键字1和关键字2之间的值 - - Args: - str: 包括key1、key2的字符串 - key1: 关键字1 - key2: 关键字2 - - Return： - key1 ... key2 内的值（去除了2端的空格） - """ - - offset = len(key1) - start = str.find(key1) + offset - end = str.find(key2) - value = str[start : end] - return value.strip() - -def queryDatas(queryDef): - """查询并过滤数据 - - Args: - queryDef: 查询定义 - Return: - SortItem List：待排序的数据列表 - """ - - result = [] - #查询所有文件的数据 - for file in queryDef.fileList: - temp = [] - startTime = None - clazz = None - method = None - count = 0 - totalTime = 0 - avgTime = 0 - with io.open(file, 'r', encoding=queryDef.encoding) as fd: - for line in fd: - #处理startTime:...行 - match = START_TIME_PATTERN.match(line) - if match: - #如果开始时间有变化，则保存结果，否则丢弃 - newStartTime = getValueInBrackets(line) - if newStartTime != startTime: - result.extend(temp) - startTime = newStartTime - temp = [] - continue - - #处理endTime:...行 - match = END_TIME_PATTERN.match(line) - if match: - endTime = getValueInBrackets(line) - for item in temp: - item.endTime = endTime - continue - - #解析className...行 - match = CLASS_NAME_PATTERN.match(line) - if match: - clazz = getValueInBrackets(line) - continue - - #解析methodName...行 - match = METHOD_NAME_PATTERN.match(line) - if match: - for str in line.split(','): - #处理methodName - match = METHOD_NAME_PATTERN.match(str) - if match: - method = getValueInBrackets(str) - continue - - #处理counter - match = COUNTER_PATTERN.match(str) - if match: - count = getValueInBrackets(str) - continue - - #处理time - match = TIME_PATTERN.match(str) - if match: - totalTime = getValueInBrackets(str) - continue - - item = SortItem(clazz, method, count, totalTime, startTime) - temp.append(item) - - #保存最后一个时间域的数据 - result.extend(temp) - - return result - -def filterDatas(itemList, queryDef): - """过滤数据列表 - - Args: - itemList: 数据 - queryDef: 查询定义 - Return: - dataList: 过滤后的数据 - """ - - dataList = [] - for item in itemList: - if checkItem(item, queryDef): - dataList.append(item) - - return dataList - -def checkItem(item, queryDef): - """校验数据 - - Args: - item: 数据 - queryDef: 查询定义 - """ - - result = True - for ci in queryDef.compareList: - if ci.key == "time": - result = JQL_COMPARE.get(ci.operator)(item.time, int(ci.value)) - elif ci.key == "count": - result = JQL_COMPARE.get(ci.operator)(item.count, int(ci.value)) - elif ci.key == "avg time": - result = JQL_COMPARE.get(ci.operator)(item.avgTime, int(ci.value)) - elif ci.key == "method": - result = JQL_COMPARE.get(ci.operator)(item.method.lower(), ci.value) - elif ci.key == "class": - result = JQL_COMPARE.get(ci.operator)(item.clazz.lower(), ci.value) - elif ci.key == "start time": - result = JQL_COMPARE.get(ci.operator)( - time.strptime(item.startTime, '%Y-%m-%d %H:%M:%S'), - time.strptime(ci.value, '%Y-%m-%d %H:%M:%S') - ) - elif ci.key == "end time": - result = JQL_COMPARE.get(ci.operator)( - time.strptime(item.endTime, '%Y-%m-%d %H:%M:%S'), - time.strptime(ci.value, '%Y-%m-%d %H:%M:%S') - ) - - if result == False: - break - - return result - -def sortAndCut(itemList, queryDef): - """将itemList根据查询条件排序 - - Args: - itemList: 数据 - queryDef：查询定义 - Return: - dataList: 排序和过滤后的结果 - """ - - #处理排序 - for key, order in zip(reversed(queryDef.keyList), reversed(queryDef.orderList)): - #得到lambda函数 - keyLambda = None - if key == 'count': - keyLambda = lambda item: item.count - elif key == 'time': - keyLambda = lambda item: item.time - elif key == 'avg time': - keyLambda = lambda item: item.avgTime - elif key == 'start time': - keyLambda = lambda item: time.strptime(item.startTime, '%Y-%m-%d %H:%M:%S') if item.startTime != None else EARLIEST_TIME - elif key == 'end time': - keyLambda = lambda item: time.strptime(item.endTime, '%Y-%m-%d %H:%M:%S') if item.endTime != None else EARLIEST_TIME - else: - continue - - #判断是否逆排序（默认递增排序） - rev = (order == 'desc') - - itemList.sort(key=keyLambda, reverse=rev) - - return itemList[0 : queryDef.limit] if queryDef.limit != -1 else itemList - -def drawTable(itemList, queryDef): - """画表格 - - Args: - itemList: 数据 - queryDef: 查询定义 - - Example: - +---------+----------+-----------+------------+--------------+ - | count | time | avg time | method | class | - +---------+----------+-----------+------------+--------------+ - | 10 | 500 | 50 | sayHello | Test.java | - +---------+----------+-----------+------------+--------------+ - """ - - # 画表头 - drawLine(queryDef) - drawTitle(queryDef) - drawLine(queryDef) - - # 画数据行 - drawDataRows(itemList, queryDef) - - # 画结尾行 - drawLine(queryDef) - -def drawLine(queryDef): - """画分割线 - - Args: - queryDef: 查询定义 - """ - - formatStr = "" - valueList = [] - for title in queryDef.titleList: - colDef = queryDef.tableCols[title] - size = colDef.size + 2 - formatStr += ('+' + formatString("string", size, False)) - valueList.append("-"*size) - - formatStr += "+" - - print(formatStr % tuple(valueList)) - -def drawTitle(queryDef): - """画表头 - - Args: - queryDef: 查询定义 - """ - - formatStr = "" - valueList = [] - for title in queryDef.titleList: - colDef = queryDef.tableCols[title] - formatStr += ('| ' + formatString("string", colDef.size) + ' ') - valueList.append(title) - - formatStr += "|" - print(formatStr % tuple(valueList)) - -def drawDataRows(dataList, queryDef): - """画数据行 - - Args: - itemList: 数据 - queryDef: 查询定义 - """ - - for data in dataList: - formatStr = "" - valueList = [] - for title in queryDef.titleList: - colDef = queryDef.tableCols[title] - formatStr += ('| ' + formatString(colDef.type, colDef.size) + ' ') - - if title == 'time': - valueList.append(data.time) - elif title == 'count': - valueList.append(data.count) - elif title == 'avg time': - valueList.append(data.avgTime) - elif title == 'method': - valueList.append(data.method) - elif title == 'class': - valueList.append(data.clazz) - elif title == 'start time': - valueList.append(data.startTime) - elif title == 'end time': - valueList.append(data.endTime) - - formatStr += "|" - print(formatStr % tuple(valueList)) - -def formatString(type, size, leftAlignment=True): - """得到格式化占位符 - - Args: - type: 数据类型 - size: 位数 - leftAlignment：是否左对齐 - - Return: - 格式化占位符 - """ - - prefix = ('-' if leftAlignment else '') - result = '%' + prefix + str(size) - - if type == "int": - result += 'd' - elif type == "float": - result += '.2f' - else: - result += 's' - - return result - -def executeQuery(jql): - """执行jql，并输出表格 - - Args: - jql: 查询语句 - """ - - try: - print("") - - #校验jql - none, checkTime = JQL_TIMER(checkJQL, jql) - #解析jql - queryDef, parseTime = JQL_TIMER(parseJQL, jql) - #查询数据 - dataList, queryTime = JQL_TIMER(queryDatas, queryDef) - #过滤数据 - dataList, filterTime = JQL_TIMER(filterDatas, dataList, queryDef) - #排序、裁剪数据 - dataList, sortTime = JQL_TIMER(sortAndCut, dataList, queryDef) - #画表 - none, drawTime = JQL_TIMER(drawTable, dataList, queryDef) - - total = checkTime + parseTime + queryTime + filterTime + sortTime + drawTime - - print("spend %.2fs(check: %.2fs, parse: %.2fs, query: %.2fs, filter: %.2fs, sort: %.2fs, draw: %.2fs)\n" % - (total, checkTime, parseTime, queryTime, filterTime, sortTime, drawTime)) - except Exception as err: - msg = "[JQL] {0}".format(err) - length = len(msg) - print("%s\n%s\n%s\n" % ("*"*length, msg, "*"*length)) - -def JQL_TIMER(func, *args): - """计时函数 - - Args: - func: 函数名 - args: 可变参数 - Return: - 函数执行结果, 函数执行时间 - """ - - start = time.time() - result = func(*args) - end = time.time() - return result, end - start - -def main(): - """主函数""" - - if len(sys.argv) > 1: - executeQuery(sys.argv[1]) - else: - print("Please input JQL\ninput 'q!' for quit, input ';' for execute jql\n") - jql = "" - while (True): - line = input(">>> ").lower() - if (line == "q!"): - print("Thanks.") - sys.exit() - elif line.find(";") != -1: - line = line.split(";") - jql += (' ' + line[0].strip() + ';') - executeQuery(jql) - jql = "" - else: - jql += (' ' + line.strip()) - -if __name__ == "__main__": - main() - diff --git a/resources/JQL/JQLCore.py b/resources/JQL/JQLCore.py deleted file mode 100644 index 327367b..0000000 --- a/resources/JQL/JQLCore.py +++ /dev/null @@ -1,107 +0,0 @@ -#coding=utf-8 - -class ColumnDefinition: - """列定义""" - - def __init__(self, name, type, size): - self.name = name - self.type = type - self.size = int(size) - -#java-agent-log-table表头定义 -AgentLogTableTitles = ['time', 'count', 'avg time', 'method', 'class', 'start time', 'end time'] - -#java-agent-log-table定义 -AgentLogTable = { - 'time': ColumnDefinition('time', 'int', 10), - 'count': ColumnDefinition('count', 'int', 10), - 'avg time': ColumnDefinition('avg time', 'int', 10), - 'method': ColumnDefinition('method', 'string', 35), - 'class': ColumnDefinition('method', 'string', 100), - 'start time': ColumnDefinition('start time', 'string', 20), - 'end time': ColumnDefinition('end time', 'string', 20) -} - -class QueryDefinition: - """查询定义 - - 将解析后的查询条件保存于此，用于查询方法间的参数传递 - """ - - def __init__(self, titleList, fileList, encoding, keyList, orderList=[], compareList=[], limit=-1): - self.titleList = titleList - self.fileList = fileList - self.encoding = encoding - self.keyList = keyList - self.orderList = orderList - self.compareList = compareList - self.limit = int(limit) - self.tableCols= AgentLogTable - -class CompareItem: - """比较项""" - - def __init__(self, key, operator, value): - self.key = key - self.operator = operator - self.value = value - -def equal(x, y): - return x == y - -def lessThan(x, y): - return x < y - -def lessThanOrEqualTo(x, y): - return x <= y - -def greaterThan(x, y): - return x > y - -def greaterThanOrEqualTo(x, y): - return x >= y - -#jql比较操作 -JQL_COMPARE = { - "=": equal, - "<": lessThan, - "<=": lessThanOrEqualTo, - ">": greaterThan, - ">=": greaterThanOrEqualTo -} - -class SortItem: - """排序项""" - - def __init__(self, clazz, method, count, time, startTime, endTime=None): - """ - Args: - clazz: 类名 - method: 方法 - count: 方法调用总次数 - time: 方法调用总时间 - startTime: 开始时间 - """ - - self.clazz = clazz - self.method = method - self.count = int(count) - self.time = int(time) - self.startTime = startTime - self.endTime = endTime - self.avgTime = float(self.time / self.count) #方法调用平均时间 - - def copy(self): - """复制""" - - return SortItem(self.clazz, self.method, self.count, self.time, self.startTime) - - def equals(self, other): - """比较是否相等""" - - return (self.clazz == other.clazz - and self.method == other.method - and self.count == other.count - and self.time == other.time - and self.startTime == other.startTime - and self.avgTime == other.avgTime) diff --git a/resources/JQL/Readme b/resources/JQL/Readme deleted file mode 100644 index 1e7b013..0000000 --- a/resources/JQL/Readme +++ /dev/null @@ -1,41 +0,0 @@ -JQL工具由北京华宇信息技术有限公司-金雷（人送外号金大侠）开发。 - -[目录说明] -/JQL -- 代码目录 - JQL.py -- 实现JQL查询 - JQLCore.py -- JQL核心数据结构定义 - - -[使用说明] -1. 确保python34安装完毕，并且在环境变量里配置了其path -2. 进入JQL目录，空白处按住shift+右键，选择"在"在此处打开命令窗口"，弹出命令窗口 -3. 在命令窗口输入jql，进入JQL程序，如果看到如下字符串表示启动成功 -Please input JQL -input 'q!' for quit, input ';' for execute jql - ->>>_ -4. 打开JQL例子.txt,随意复制一个jql查询语句进去，按回车，JQL将返回一个表格做为结构 - -[JQL语法说明] -[ select < col1 [ , col2, col3, ... ] > ] -< from < file1|folder1 [ , file2|folder2, file3|folder3, ... ] > > -[ where ] -[ order by ] -[ limit ] - -补充说明： -from里如果是文件夹，则统计文件夹下所有文件 -where条件目前只支持and -如果表格看起来很混乱，需要右击命令窗口 > 属性 > 布局， 将屏幕缓冲区大小调大点即可，我的参数是 宽度：3000 * 高度 6000 - -[版本说明] -JQL0.1Beta刚刚诞生，目前非常不成熟，还只支持一种log：即丁建水的thunisoft-javaagent产生的日志 - -[后续工作] -0.2版：计划支持所有主流log，where条件支持同select -0.3版：计划支持C/S结构 -0.4版：计划支持主-主结构，主-从结构 -0.5版：计划用QT实现一个界面 -1.0版：系统稳定，正式发版 - -1.0版发布后，可能实现身份证系统识别，也可能鸽了，看心情 diff --git a/resources/images/JQL.png b/resources/images/JQL.png deleted file mode 100644 index 5f982a88632ec656426a41b84a3f51cf42479ab7..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 99371 zcmcG#cT|&E+c&D?D5EGSNRu`oMY^DXw4f9PY0?Bj34#bnlM-qIqez!7y$wh&L0agE zNE0GN3=kk|S40_|3&89VsQp)v<)j|uRAlswY#X%=Y> zdG?S|AMuBFj;EVSg>_s;atB?v?DZt1%z-PHKu^`)TQ3>MMX*QQ2d>0?KJ_}V=Y@lA zV(w=?agUM`_Jx$&(keT+VYQ$gFF7~o)iiL9yxU?HAt)4&c205jJhEzdk{^_>cH~^c zb@k;ffa=9d|9Ba5aOWHuY5ntM`zl6L@SiV-*`(-yzA|qK{qy6ZNBTT0|7h~kCDy2a zwx`w8Bk*4zUvT_agFTruGrKVvWx#g-8q4~}x&VK1JcP(|YdmQ$5Y>_*7Wx5hKq%s~ zj-6yMg@_eH6oR?NI4cI%#Z~03vwW+pTZY%`DHaxo8Iw_MgF1izwyneJRFe)5Fsh!c z$5cnyu_frpvGz@xMjz=#z0C<-VY7 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logs, see http://www.java.com/en/download/help/error_hotspot.xml -hs_err_pid* -target/maven-archiver/pom.properties -*.prefs -*.project -.classpath -/target -/.settings diff --git a/src/com/wenshuo/agent/Agent.java b/src/com/wenshuo/agent/Agent.java deleted file mode 100644 index 1bfd12b..0000000 --- a/src/com/wenshuo/agent/Agent.java +++ /dev/null @@ -1,26 +0,0 @@ -/* - * @(#)Agent.java 2015-7-24 上午09:49:34 - * javaagent - * Copyright 2015 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent; -import java.lang.instrument.Instrumentation; -import com.wenshuo.agent.log.ExecuteLogUtils; -import com.wenshuo.agent.transformer.AgentLogClassFileTransformer; - -/** - * Agent - * - * @author dingjsh - */ -public class Agent { - - public static void premain(String agentArs, Instrumentation inst) { - // 初始化配置 - ConfigUtils.initProperties(agentArs); - ExecuteLogUtils.init(); - inst.addTransformer(new AgentLogClassFileTransformer()); - } - -} diff --git a/src/com/wenshuo/agent/AgentUtils.java b/src/com/wenshuo/agent/AgentUtils.java deleted file mode 100644 index e133898..0000000 --- a/src/com/wenshuo/agent/AgentUtils.java +++ /dev/null @@ -1,180 +0,0 @@ -/* - * @(#)AgentUtils.java 2015-7-27 下午05:26:24 - * javaagent - * Copyright 2015 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent; - -import java.io.ByteArrayOutputStream; -import java.io.File; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.io.Writer; - -/** - * AgentUtils - * - * @author dingjsh - * @time 2015-7-27下午05:26:24 - */ -public class AgentUtils { - - /** - *

- * Checks if a String is whitespace, empty ("") or null. - *

- * - * 
-     * StringUtils.isBlank(null)      = true
-     * StringUtils.isBlank("")        = true
-     * StringUtils.isBlank(" ")       = true
-     * StringUtils.isBlank("bob")     = false
-     * StringUtils.isBlank("  bob  ") = false
-     *
- * - * @param str the String to check, may be null - * @return true if the String is null, empty or whitespace - * @since 2.0 - */ - public static boolean isBlank(String str) { - int strLen; - if (str == null || (strLen = str.length()) == 0) { - return true; - } - for (int i = 0; i < strLen; i++) { - if (!Character.isWhitespace(str.charAt(i))) { - return false; - } - } - return true; - } - - /** - *

- * Checks if a String is not empty (""), not null and not whitespace only. - *

- * - * 
-     * StringUtils.isNotBlank(null)      = false
-     * StringUtils.isNotBlank("")        = false
-     * StringUtils.isNotBlank(" ")       = false
-     * StringUtils.isNotBlank("bob")     = true
-     * StringUtils.isNotBlank("  bob  ") = true
-     *
- * - * @param str the String to check, may be null - * @return true if the String is not empty and not null and not - * whitespace - * @since 2.0 - */ - static boolean isNotBlank(String str) { - return !isBlank(str); - } - - /** - * Unconditionally close an InputStream. - *

- * Equivalent to {@link InputStream#close()}, except any exceptions will be - * ignored. This is typically used in finally blocks. - * - * @param input the InputStream to close, may be null or already closed - */ - static void closeQuietly(InputStream input) { - try { - if (input != null) { - input.close(); - } - } catch (IOException ioe) { - // ignore - } - } - - public static int copy(InputStream input, OutputStream output) - throws IOException { - long count = copyLarge(input, output); - if (count > Integer.MAX_VALUE) { - return -1; - } - return (int) count; - } - - private static long copyLarge(InputStream input, OutputStream output) - throws IOException { - byte[] buffer = new byte[4096]; - long count = 0; - int n; - while (-1 != (n = input.read(buffer))) { - output.write(buffer, 0, n); - count += n; - } - return count; - } - - // read toByteArray - //----------------------------------------------------------------------- - - /** - * Get the contents of an InputStream as a byte[]. - *

- * This method buffers the input internally, so there is no need to use a - * BufferedInputStream. - * - * @param input the InputStream to read from - * @return the requested byte array - * @throws NullPointerException if the input is null - * @throws IOException if an I/O error occurs - */ - public static byte[] toByteArray(InputStream input) throws IOException { - ByteArrayOutputStream output = new ByteArrayOutputStream(); - copy(input, output); - return output.toByteArray(); - } - - /** - * Unconditionally close a Writer. - *

- * Equivalent to {@link Writer#close()}, except any exceptions will be ignored. - * This is typically used in finally blocks. - * - * @param output the Writer to close, may be null or already closed - */ - public static void closeQuietly(Writer output) { - try { - if (output != null) { - output.close(); - } - } catch (IOException ioe) { - // ignore - } - } - - /** - * Makes a directory, including any necessary but nonexistent parent - * directories. If there already exists a file with specified name or - * the directory cannot be created then an exception is thrown. - * - * @param directory directory to create, must not be null - * @throws NullPointerException if the directory is null - * @throws IOException if the directory cannot be created - */ - public static void forceMkdir(File directory) throws IOException { - if (directory.exists()) { - if (directory.isFile()) { - String message = - "File " - + directory - + " exists and is " - + "not a directory. Unable to create directory."; - throw new IOException(message); - } - } else { - if (!directory.mkdirs()) { - String message = - "Unable to create directory " + directory; - throw new IOException(message); - } - } - } -} diff --git a/src/com/wenshuo/agent/ConfigConsts.java b/src/com/wenshuo/agent/ConfigConsts.java deleted file mode 100644 index 6edd2c4..0000000 --- a/src/com/wenshuo/agent/ConfigConsts.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * @(#)ConfigConsts.java 2015-7-27 下午06:06:23 - * javaagent - * Copyright 2015 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent; - -/** - * ConfigConsts - * - * @author dingjsh - * @time 2015-7-27下午06:06:23 - */ -public interface ConfigConsts { - - String EXCLUDE_PACKAGE_DEFAULT = "agent.exclude.package.default"; - - String EXCLUDE_PACKAGE = "agent.exclude.package"; - - String INCLUDE_PACKAGE = "agent.include.package"; - - String LOG_FILE = "agent.log.file"; - - String LOG_INTERVAL_SECONDS = "agent.log.interval.seconds"; - - String EXCLUDE_CLASS_REGEX = "agent.exclude.class.regex"; - - String EXCLUDE_CLASS_REGEX_DEFAULT = "agent.exclude.class.regex.default"; - - String LOG_AVG_EXECUTE_TIME = "agent.log.avg.execute.time"; - - String POJO_MONITOR_OPEN = "agent.pojo.monitor.open"; - - String LOG_TIME_NANO = "agent.log.nano"; - - int DEFAULT_LOG_INTERVAL = 600; - -} diff --git a/src/com/wenshuo/agent/ConfigUtils.java b/src/com/wenshuo/agent/ConfigUtils.java deleted file mode 100644 index 4de6036..0000000 --- a/src/com/wenshuo/agent/ConfigUtils.java +++ /dev/null @@ -1,162 +0,0 @@ -package com.wenshuo.agent; - -import java.io.File; -import java.io.FileInputStream; -import java.io.InputStream; -import java.util.Arrays; -import java.util.HashSet; -import java.util.Properties; -import java.util.Set; - -/** - * 获取配置信息
- * ConfigUtils - * - * @author dingjsh - * @time 2015-7-27下午09:16:18 - */ -public class ConfigUtils { - - private static Properties props; - - private static Set excludePackages; - - private static Set includePackages; - - private static Set excludeClassRegexs; - - private ConfigUtils() { - super(); - } - - static void initProperties(String propertiesFileName) { - props = getProperties(propertiesFileName); - initExcluePackages(); - initIncludePackages(); - initExcludeClassRegexs(); - } - - private static String getProperty(String key) { - if (null != props && AgentUtils.isNotBlank(key)) { - return props.getProperty(key); - } - return null; - } - - private static Properties getProperties(String propertiesFileName) { - Properties properties = new Properties(); - InputStream input = null; - try { - input = ConfigUtils.class.getClassLoader().getResourceAsStream("props/agent.properties"); - properties.load(input); - } catch (Exception e) { - System.err.println("未找到默认配置"); - } finally { - AgentUtils.closeQuietly(input); - } - if (AgentUtils.isNotBlank(propertiesFileName)) { - try { - input = new FileInputStream(new File(propertiesFileName)); - properties.load(input); - } catch (Exception e) { - System.err.println(e); - } finally { - AgentUtils.closeQuietly(input); - } - } - return properties; - } - - public static Set getExcludePackages() { - return excludePackages; - } - - private static void initExcluePackages() { - if (null == excludePackages) { - String excludeDefault = getProperty(ConfigConsts.EXCLUDE_PACKAGE_DEFAULT); - String excludes = getProperty(ConfigConsts.EXCLUDE_PACKAGE); - excludePackages = new HashSet(); - if (AgentUtils.isNotBlank(excludeDefault)) { - excludePackages.addAll(Arrays.asList(excludeDefault.split(";"))); - } - if (AgentUtils.isNotBlank(excludes)) { - excludePackages.addAll(Arrays.asList(excludes.split(";"))); - } - } - } - - public static Set getIncludePackages() { - return includePackages; - } - - private static void initIncludePackages() { - if (null == includePackages) { - String includes = getProperty(ConfigConsts.INCLUDE_PACKAGE); - includePackages = new HashSet(); - if (AgentUtils.isNotBlank(includes)) { - includePackages.addAll(Arrays.asList(includes.split(";"))); - } - } - } - - public static String getLogFileName() { - return getProperty(ConfigConsts.LOG_FILE); - } - - public static int getLogInterval() { - String intervalStr = getProperty(ConfigConsts.LOG_INTERVAL_SECONDS); - if (AgentUtils.isBlank(intervalStr)) { - return ConfigConsts.DEFAULT_LOG_INTERVAL; - } - return Integer.parseInt(intervalStr); - } - - public static Set getExcludeClassRegexs() { - return excludeClassRegexs; - } - - private static void initExcludeClassRegexs() { - if (null == excludeClassRegexs) { - Set excludeClassRegexsTemp = new HashSet(); - String defaultRegex = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX_DEFAULT); - if (AgentUtils.isNotBlank(defaultRegex)) { - excludeClassRegexsTemp.addAll(Arrays.asList(defaultRegex.split(";"))); - } - String excludeRegexStr = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX); - if (AgentUtils.isNotBlank(excludeRegexStr)) { - excludeClassRegexsTemp.addAll(Arrays.asList(excludeRegexStr.split(";"))); - } - excludeClassRegexs = excludeClassRegexsTemp; - } - } - - public static boolean isLogAvgExecuteTime() { - String value = getProperty(ConfigConsts.LOG_AVG_EXECUTE_TIME); - return "true".equalsIgnoreCase(value); - } - - /** - * 是否开启pojo的监控 - * - * @return 是否开启pojo的监控 - * @author dingjsh - */ - public static boolean isOpenPojoMonitor() { - String value = getProperty(ConfigConsts.POJO_MONITOR_OPEN); - return "true".equalsIgnoreCase(value); - } - - /** - * ConfigUtils - * - * @return 是否采用nanoTime来记录方法的执行时间 - * @description 是否采用nanoTime来记录方法的执行时间 - * @author dingjsh - * @date 2018年5月25日 下午2:08:33 - * @version 1.2.0 - */ - public static boolean isUsingNanoTime() { - String value = getProperty(ConfigConsts.LOG_TIME_NANO); - return "true".equalsIgnoreCase(value); - } -} diff --git a/src/com/wenshuo/agent/NamedThreadFactory.java b/src/com/wenshuo/agent/NamedThreadFactory.java deleted file mode 100644 index 6daceec..0000000 --- a/src/com/wenshuo/agent/NamedThreadFactory.java +++ /dev/null @@ -1,35 +0,0 @@ -package com.wenshuo.agent; - -import java.util.concurrent.ThreadFactory; -import java.util.concurrent.atomic.AtomicInteger; - -/** - * 此类是拷贝的dubbo中的NamedThreadFactory,在创建线程池时总是没有名字，区分不出来是哪个线程池创建的，不便于调试 - * NamedThreadFactory - * @author dingjsh - * @time 2016-5-19上午09:40:50 - */ -public class NamedThreadFactory implements ThreadFactory { - private final AtomicInteger mThreadNum = new AtomicInteger(1); - - private final String mPrefix; - - private final boolean mDaemon; - - private final ThreadGroup mGroup; - - public NamedThreadFactory(String prefix, boolean daemon) { - mPrefix = prefix + "-thread-"; - mDaemon = daemon; - SecurityManager s = System.getSecurityManager(); - mGroup = (s == null) ? Thread.currentThread().getThreadGroup() : s - .getThreadGroup(); - } - - public Thread newThread(Runnable runnable) { - String name = mPrefix + mThreadNum.getAndIncrement(); - Thread ret = new Thread(mGroup, runnable, name, 0); - ret.setDaemon(mDaemon); - return ret; - } -} \ No newline at end of file diff --git a/src/com/wenshuo/agent/PojoDetector.java b/src/com/wenshuo/agent/PojoDetector.java deleted file mode 100644 index 48cf45c..0000000 --- a/src/com/wenshuo/agent/PojoDetector.java +++ /dev/null @@ -1,65 +0,0 @@ -/* - * @(#)PojoDetector.java 2016-5-7 下午04:18:14 - * javaagent - * Copyright 2016 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent; - -import java.util.Collections; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Map; -import java.util.Set; - -import com.wenshuo.agent.javassist.CtMethod; - -/** - * PojoDetector - * @author dingjsh - * @time 2016-5-7下午04:18:14 - */ -public class PojoDetector { - - public static Set getPojoMethodNames(CtMethod[] methods){ - Set pojoMethods = Collections.emptySet(); - if(null != methods && methods.length>0){ - pojoMethods = new HashSet(); - Map propName2MethodName = new HashMap(); - for(CtMethod method : methods){ - String methodName = method.getName(); - if(isSetMethod(methodName) || isGetMethod(methodName)){ - String propName = getPojoPropertyName(methodName); - if(propName2MethodName.containsKey(propName)){ - pojoMethods.add(methodName); - pojoMethods.add(propName2MethodName.get(propName)); - }else{ - propName2MethodName.put(propName, methodName); - } - } - } - } - return pojoMethods; - } - - - - private static boolean isGetMethod(String methodName){ - return methodName.startsWith("get") || methodName.startsWith("is"); - } - - private static boolean isSetMethod(String methodName){ - return methodName.startsWith("set"); - } - - private static String getPojoPropertyName(String methodName){ - if(methodName.startsWith("get") || methodName.startsWith("set")){ - return methodName.substring(3); - }else if(methodName.startsWith("is")){ - return methodName.substring(2); - } - return ""; - } - - -} diff --git a/src/com/wenshuo/agent/javassist/ByteArrayClassPath.java b/src/com/wenshuo/agent/javassist/ByteArrayClassPath.java deleted file mode 100644 index d4d9347..0000000 --- a/src/com/wenshuo/agent/javassist/ByteArrayClassPath.java +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.*; -import java.net.URL; -import java.net.MalformedURLException; - -/** - * A ByteArrayClassPath contains bytes that is served as - * a class file to a ClassPool. It is useful to convert - * a byte array to a CtClass object. - * - *

For example, if you want to convert a byte array b - * into a CtClass object representing the class with a name - * classname, then do as following: - * - * 

- * ClassPool cp = ClassPool.getDefault();
- * cp.insertClassPath(new ByteArrayClassPath(classname, b));
- * CtClass cc = cp.get(classname);
- *
- * - *

The ClassPool object cp uses the created - * ByteArrayClassPath object as the source of the class file. - * - *

A ByteArrayClassPath must be instantiated for every - * class. It contains only a single class file. - * - * @see javassist.ClassPath - * @see ClassPool#insertClassPath(ClassPath) - * @see ClassPool#appendClassPath(ClassPath) - * @see ClassPool#makeClass(InputStream) - */ -public class ByteArrayClassPath implements ClassPath { - protected String classname; - protected byte[] classfile; - - /* - * Creates a ByteArrayClassPath containing the given - * bytes. - * - * @param name a fully qualified class name - * @param classfile the contents of a class file. - */ - public ByteArrayClassPath(String name, byte[] classfile) { - this.classname = name; - this.classfile = classfile; - } - - /** - * Closes this class path. - */ - public void close() {} - - public String toString() { - return "byte[]:" + classname; - } - - /** - * Opens the class file. - */ - public InputStream openClassfile(String classname) { - if(this.classname.equals(classname)) - return new ByteArrayInputStream(classfile); - else - return null; - } - - /** - * Obtains the URL. - */ - public URL find(String classname) { - if(this.classname.equals(classname)) { - String cname = classname.replace('.', '/') + ".class"; - try { - // return new File(cname).toURL(); - return new URL("file:/ByteArrayClassPath/" + cname); - } - catch (MalformedURLException e) {} - } - - return null; - } -} diff --git a/src/com/wenshuo/agent/javassist/CannotCompileException.java b/src/com/wenshuo/agent/javassist/CannotCompileException.java deleted file mode 100644 index 31057c8..0000000 --- a/src/com/wenshuo/agent/javassist/CannotCompileException.java +++ /dev/null @@ -1,120 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Thrown when bytecode transformation has failed. - */ -public class CannotCompileException extends Exception { - private Throwable myCause; - - /** - * Gets the cause of this throwable. - * It is for JDK 1.3 compatibility. - */ - public Throwable getCause() { - return (myCause == this ? null : myCause); - } - - /** - * Initializes the cause of this throwable. - * It is for JDK 1.3 compatibility. - */ - public synchronized Throwable initCause(Throwable cause) { - myCause = cause; - return this; - } - - private String message; - - /** - * Gets a long message if it is available. - */ - public String getReason() { - if (message != null) - return message; - else - return this.toString(); - } - - /** - * Constructs a CannotCompileException with a message. - * - * @param msg the message. - */ - public CannotCompileException(String msg) { - super(msg); - message = msg; - initCause(null); - } - - /** - * Constructs a CannotCompileException with an Exception - * representing the cause. - * - * @param e the cause. - */ - public CannotCompileException(Throwable e) { - super("by " + e.toString()); - message = null; - initCause(e); - } - - /** - * Constructs a CannotCompileException with a detailed message - * and an Exception representing the cause. - * - * @param msg the message. - * @param e the cause. - */ - public CannotCompileException(String msg, Throwable e) { - this(msg); - initCause(e); - } - - /** - * Constructs a CannotCompileException with a - * NotFoundException. - */ - public CannotCompileException(NotFoundException e) { - this("cannot find " + e.getMessage(), e); - } - - /** - * Constructs a CannotCompileException with an CompileError. - */ - public CannotCompileException(CompileError e) { - this("[source error] " + e.getMessage(), e); - } - - /** - * Constructs a CannotCompileException - * with a ClassNotFoundException. - */ - public CannotCompileException(ClassNotFoundException e, String name) { - this("cannot find " + name, e); - } - - /** - * Constructs a CannotCompileException with a ClassFormatError. - */ - public CannotCompileException(ClassFormatError e, String name) { - this("invalid class format: " + name, e); - } -} diff --git a/src/com/wenshuo/agent/javassist/ClassClassPath.java b/src/com/wenshuo/agent/javassist/ClassClassPath.java deleted file mode 100644 index be42a50..0000000 --- a/src/com/wenshuo/agent/javassist/ClassClassPath.java +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.InputStream; -import java.net.URL; - -/** - * A search-path for obtaining a class file - * by getResourceAsStream() in java.lang.Class. - * - *

Try adding a ClassClassPath when a program is running - * with a user-defined class loader and any class files are not found with - * the default ClassPool. For example, - * - * 

- * ClassPool cp = ClassPool.getDefault();
- * cp.insertClassPath(new ClassClassPath(this.getClass()));
- *
- * - * This code snippet permanently adds a ClassClassPath - * to the default ClassPool. Note that the default - * ClassPool is a singleton. The added - * ClassClassPath uses a class object representing - * the class including the code snippet above. - * - * @see ClassPool#insertClassPath(ClassPath) - * @see ClassPool#appendClassPath(ClassPath) - * @see LoaderClassPath - */ -public class ClassClassPath implements ClassPath { - private Class thisClass; - - /** Creates a search path. - * - * @param c the Class object used to obtain a class - * file. getResourceAsStream() is called on - * this object. - */ - public ClassClassPath(Class c) { - thisClass = c; - } - - ClassClassPath() { - /* The value of thisClass was this.getClass() in early versions: - * - * thisClass = this.getClass(); - * - * However, this made openClassfile() not search all the system - * class paths if javassist.jar is put in jre/lib/ext/ - * (with JDK1.4). - */ - this(java.lang.Object.class); - } - - /** - * Obtains a class file by getResourceAsStream(). - */ - public InputStream openClassfile(String classname) { - String jarname = "/" + classname.replace('.', '/') + ".class"; - return thisClass.getResourceAsStream(jarname); - } - - /** - * Obtains the URL of the specified class file. - * - * @return null if the class file could not be found. - */ - public URL find(String classname) { - String jarname = "/" + classname.replace('.', '/') + ".class"; - return thisClass.getResource(jarname); - } - - /** - * Does nothing. - */ - public void close() { - } - - public String toString() { - return thisClass.getName() + ".class"; - } -} diff --git a/src/com/wenshuo/agent/javassist/ClassMap.java b/src/com/wenshuo/agent/javassist/ClassMap.java deleted file mode 100644 index 2dbf987..0000000 --- a/src/com/wenshuo/agent/javassist/ClassMap.java +++ /dev/null @@ -1,173 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.Descriptor; - -/** - * A hash table associating class names with different names. - * - *

This hashtable is used for replacing class names in a class - * definition or a method body. Define a subclass of this class - * if a more complex mapping algorithm is needed. For example, - * - * 

class MyClassMap extends ClassMap {
- *   public Object get(Object jvmClassName) {
- *     String name = toJavaName((String)jvmClassName);
- *     if (name.startsWith("java."))
- *         return toJvmName("java2." + name.substring(5));
- *     else
- *         return super.get(jvmClassName);
- *   }
- * }
- * - *

This subclass maps java.lang.String to - * java2.lang.String. Note that get() - * receives and returns the internal representation of a class name. - * For example, the internal representation of java.lang.String - * is java/lang/String. - * - *

Note that this is a map from String to String. - * - * @see #get(Object) - * @see CtClass#replaceClassName(ClassMap) - * @see CtNewMethod#copy(CtMethod,String,CtClass,ClassMap) - */ -public class ClassMap extends java.util.HashMap { - private ClassMap parent; - - /** - * Constructs a hash table. - */ - public ClassMap() { parent = null; } - - ClassMap(ClassMap map) { parent = map; } - - /** - * Maps a class name to another name in this hashtable. - * The names are obtained with calling Class.getName(). - * This method translates the given class names into the - * internal form used in the JVM before putting it in - * the hashtable. - * - * @param oldname the original class name - * @param newname the substituted class name. - */ - public void put(CtClass oldname, CtClass newname) { - put(oldname.getName(), newname.getName()); - } - - /** - * Maps a class name to another name in this hashtable. - * If the hashtable contains another mapping from the same - * class name, the old mapping is replaced. - * This method translates the given class names into the - * internal form used in the JVM before putting it in - * the hashtable. - * - *

If oldname is identical to - * newname, then this method does not - * perform anything; it does not record the mapping from - * oldname to newname. See - * fix method. - * - * @param oldname the original class name. - * @param newname the substituted class name. - * @see #fix(String) - */ - public void put(String oldname, String newname) { - if (oldname == newname) - return; - - String oldname2 = toJvmName(oldname); - String s = (String)get(oldname2); - if (s == null || !s.equals(oldname2)) - super.put(oldname2, toJvmName(newname)); - } - - /** - * Is equivalent to put() except that - * the given mapping is not recorded into the hashtable - * if another mapping from oldname is - * already included. - * - * @param oldname the original class name. - * @param newname the substituted class name. - */ - public void putIfNone(String oldname, String newname) { - if (oldname == newname) - return; - - String oldname2 = toJvmName(oldname); - String s = (String)get(oldname2); - if (s == null) - super.put(oldname2, toJvmName(newname)); - } - - protected final void put0(Object oldname, Object newname) { - super.put(oldname, newname); - } - - /** - * Returns the class name to wihch the given jvmClassName - * is mapped. A subclass of this class should override this method. - * - *

This method receives and returns the internal representation of - * class name used in the JVM. - * - * @see #toJvmName(String) - * @see #toJavaName(String) - */ - public Object get(Object jvmClassName) { - Object found = super.get(jvmClassName); - if (found == null && parent != null) - return parent.get(jvmClassName); - else - return found; - } - - /** - * Prevents a mapping from the specified class name to another name. - */ - public void fix(CtClass clazz) { - fix(clazz.getName()); - } - - /** - * Prevents a mapping from the specified class name to another name. - */ - public void fix(String name) { - String name2 = toJvmName(name); - super.put(name2, name2); - } - - /** - * Converts a class name into the internal representation used in - * the JVM. - */ - public static String toJvmName(String classname) { - return Descriptor.toJvmName(classname); - } - - /** - * Converts a class name from the internal representation used in - * the JVM to the normal one used in Java. - */ - public static String toJavaName(String classname) { - return Descriptor.toJavaName(classname); - } -} diff --git a/src/com/wenshuo/agent/javassist/ClassPath.java b/src/com/wenshuo/agent/javassist/ClassPath.java deleted file mode 100644 index f0e90e2..0000000 --- a/src/com/wenshuo/agent/javassist/ClassPath.java +++ /dev/null @@ -1,68 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.InputStream; -import java.net.URL; - -/** - * ClassPath is an interface implemented by objects - * representing a class search path. - * ClassPool uses those objects for reading class files. - * - *

The users can define a class implementing this interface so that - * a class file is obtained from a non-standard source. - * - * @see ClassPool#insertClassPath(ClassPath) - * @see ClassPool#appendClassPath(ClassPath) - * @see ClassPool#removeClassPath(ClassPath) - */ -public interface ClassPath { - /** - * Opens a class file. - * This method may be called just to examine whether the class file - * exists as well as to read the contents of the file. - * - *

This method can return null if the specified class file is not - * found. If null is returned, the next search path is examined. - * However, if an error happens, this method must throw an exception - * so that the search will be terminated. - * - *

This method should not modify the contents of the class file. - * - * @param classname a fully-qualified class name - * @return the input stream for reading a class file - * @see javassist.Translator - */ - InputStream openClassfile(String classname) throws NotFoundException; - - /** - * Returns the uniform resource locator (URL) of the class file - * with the specified name. - * - * @param classname a fully-qualified class name. - * @return null if the specified class file could not be found. - */ - URL find(String classname); - - /** - * This method is invoked when the ClassPath object is - * detached from the search path. It will be an empty method in most of - * classes. - */ - void close(); -} diff --git a/src/com/wenshuo/agent/javassist/ClassPool.java b/src/com/wenshuo/agent/javassist/ClassPool.java deleted file mode 100644 index 2114b1f..0000000 --- a/src/com/wenshuo/agent/javassist/ClassPool.java +++ /dev/null @@ -1,1233 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.BufferedInputStream; -import java.io.File; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.lang.reflect.Method; -import java.net.URL; -import java.security.AccessController; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; -import java.security.ProtectionDomain; -import java.util.Hashtable; -import java.util.Iterator; -import java.util.ArrayList; -import java.util.Enumeration; - -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.Descriptor; - -/** - * A container of CtClass objects. - * A CtClass object must be obtained from this object. - * If get() is called on this object, - * it searches various sources represented by ClassPath - * to find a class file and then it creates a CtClass object - * representing that class file. The created object is returned to the - * caller. - * - *

Memory consumption memo: - * - *

ClassPool objects hold all the CtClasses - * that have been created so that the consistency among modified classes - * can be guaranteed. Thus if a large number of CtClasses - * are processed, the ClassPool will consume a huge amount - * of memory. To avoid this, a ClassPool object - * should be recreated, for example, every hundred classes processed. - * Note that getDefault() is a singleton factory. - * Otherwise, detach() in CtClass should be used - * to avoid huge memory consumption. - * - *

ClassPool hierarchy: - * - *

ClassPools can make a parent-child hierarchy as - * java.lang.ClassLoaders. If a ClassPool has - * a parent pool, get() first asks the parent pool to find - * a class file. Only if the parent could not find the class file, - * get() searches the ClassPaths of - * the child ClassPool. This search order is reversed if - * ClassPath.childFirstLookup is true. - * - * @see javassist.CtClass - * @see javassist.ClassPath - */ -public class ClassPool { - // used by toClass(). - private static java.lang.reflect.Method defineClass1, defineClass2; - private static java.lang.reflect.Method definePackage; - - static { - try { - AccessController.doPrivileged(new PrivilegedExceptionAction(){ - public Object run() throws Exception{ - Class cl = Class.forName("java.lang.ClassLoader"); - defineClass1 = cl.getDeclaredMethod("defineClass", - new Class[] { String.class, byte[].class, - int.class, int.class }); - - defineClass2 = cl.getDeclaredMethod("defineClass", - new Class[] { String.class, byte[].class, - int.class, int.class, ProtectionDomain.class }); - - definePackage = cl.getDeclaredMethod("definePackage", - new Class[] { String.class, String.class, String.class, - String.class, String.class, String.class, - String.class, java.net.URL.class }); - return null; - } - }); - } - catch (PrivilegedActionException pae) { - throw new RuntimeException("cannot initialize ClassPool", pae.getException()); - } - } - - /** - * Determines the search order. - * - *

If this field is true, get() first searches the - * class path associated to this ClassPool and then - * the class path associated with the parent ClassPool. - * Otherwise, the class path associated with the parent is searched - * first. - * - *

The default value is false. - */ - public boolean childFirstLookup = false; - - /** - * Turning the automatic pruning on/off. - * - *

If this field is true, CtClass objects are - * automatically pruned by default when toBytecode() etc. - * are called. The automatic pruning can be turned on/off individually - * for each CtClass object. - * - *

The initial value is false. - * - * @see CtClass#prune() - * @see CtClass#stopPruning(boolean) - * @see CtClass#detach() - */ - public static boolean doPruning = false; - - private int compressCount; - private static final int COMPRESS_THRESHOLD = 100; - - /* releaseUnmodifiedClassFile was introduced for avoiding a bug - of JBoss AOP. So the value should be true except for JBoss AOP. - */ - - /** - * If true, unmodified and not-recently-used class files are - * periodically released for saving memory. - * - *

The initial value is true. - */ - public static boolean releaseUnmodifiedClassFile = true; - - protected ClassPoolTail source; - protected ClassPool parent; - protected Hashtable classes; // should be synchronous - - /** - * Table of registered cflow variables. - */ - private Hashtable cflow = null; // should be synchronous. - - private static final int INIT_HASH_SIZE = 191; - - private ArrayList importedPackages; - - /** - * Creates a root class pool. No parent class pool is specified. - */ - public ClassPool() { - this(null); - } - - /** - * Creates a root class pool. If useDefaultPath is - * true, appendSystemPath() is called. Otherwise, - * this constructor is equivalent to the constructor taking no - * parameter. - * - * @param useDefaultPath true if the system search path is - * appended. - */ - public ClassPool(boolean useDefaultPath) { - this(null); - if (useDefaultPath) - appendSystemPath(); - } - - /** - * Creates a class pool. - * - * @param parent the parent of this class pool. If this is a root - * class pool, this parameter must be null. - * @see javassist.ClassPool#getDefault() - */ - public ClassPool(ClassPool parent) { - this.classes = new Hashtable(INIT_HASH_SIZE); - this.source = new ClassPoolTail(); - this.parent = parent; - if (parent == null) { - CtClass[] pt = CtClass.primitiveTypes; - for (int i = 0; i < pt.length; ++i) - classes.put(pt[i].getName(), pt[i]); - } - - this.cflow = null; - this.compressCount = 0; - clearImportedPackages(); - } - - /** - * Returns the default class pool. - * The returned object is always identical since this method is - * a singleton factory. - * - *

The default class pool searches the system search path, - * which usually includes the platform library, extension - * libraries, and the search path specified by the - * -classpath option or the CLASSPATH - * environment variable. - * - *

When this method is called for the first time, the default - * class pool is created with the following code snippet: - * - * 

ClassPool cp = new ClassPool();
-     * cp.appendSystemPath();
-     *
- * - *

If the default class pool cannot find any class files, - * try ClassClassPath and LoaderClassPath. - * - * @see ClassClassPath - * @see LoaderClassPath - */ - public static synchronized ClassPool getDefault() { - if (defaultPool == null) { - defaultPool = new ClassPool(null); - defaultPool.appendSystemPath(); - } - - return defaultPool; - } - - private static ClassPool defaultPool = null; - - /** - * Provide a hook so that subclasses can do their own - * caching of classes. - * - * @see #cacheCtClass(String,CtClass,boolean) - * @see #removeCached(String) - */ - protected CtClass getCached(String classname) { - return (CtClass)classes.get(classname); - } - - /** - * Provides a hook so that subclasses can do their own - * caching of classes. - * - * @see #getCached(String) - * @see #removeCached(String) - */ - protected void cacheCtClass(String classname, CtClass c, boolean dynamic) { - classes.put(classname, c); - } - - /** - * Provide a hook so that subclasses can do their own - * caching of classes. - * - * @see #getCached(String) - * @see #cacheCtClass(String,CtClass,boolean) - */ - protected CtClass removeCached(String classname) { - return (CtClass)classes.remove(classname); - } - - /** - * Returns the class search path. - */ - public String toString() { - return source.toString(); - } - - /** - * This method is periodically invoked so that memory - * footprint will be minimized. - */ - void compress() { - if (compressCount++ > COMPRESS_THRESHOLD) { - compressCount = 0; - Enumeration e = classes.elements(); - while (e.hasMoreElements()) - ((CtClass)e.nextElement()).compress(); - } - } - - /** - * Record a package name so that the Javassist compiler searches - * the package to resolve a class name. - * Don't record the java.lang package, which has - * been implicitly recorded by default. - * - *

Since version 3.14, packageName can be a - * fully-qualified class name. - * - *

Note that get() in ClassPool does - * not search the recorded package. Only the compiler searches it. - * - * @param packageName the package name. - * It must not include the last '.' (dot). - * For example, "java.util" is valid but "java.util." is wrong. - * @since 3.1 - */ - public void importPackage(String packageName) { - importedPackages.add(packageName); - } - - /** - * Clear all the package names recorded by importPackage(). - * The java.lang package is not removed. - * - * @see #importPackage(String) - * @since 3.1 - */ - public void clearImportedPackages() { - importedPackages = new ArrayList(); - importedPackages.add("java.lang"); - } - - /** - * Returns all the package names recorded by importPackage(). - * - * @see #importPackage(String) - * @since 3.1 - */ - public Iterator getImportedPackages() { - return importedPackages.iterator(); - } - - /** - * Records a class name that never exists. - * For example, a package name can be recorded by this method. - * This would improve execution performance - * since get() quickly throw an exception - * without searching the class path at all - * if the given name is an invalid name recorded by this method. - * Note that searching the class path takes relatively long time. - * - *

The current implementation of this method performs nothing. - * - * @param name an invalid class name (separeted by dots). - * @deprecated - */ - public void recordInvalidClassName(String name) { - // source.recordInvalidClassName(name); - } - - /** - * Records the $cflow variable for the field specified - * by cname and fname. - * - * @param name variable name - * @param cname class name - * @param fname field name - */ - void recordCflow(String name, String cname, String fname) { - if (cflow == null) - cflow = new Hashtable(); - - cflow.put(name, new Object[] { cname, fname }); - } - - /** - * Undocumented method. Do not use; internal-use only. - * - * @param name the name of $cflow variable - */ - public Object[] lookupCflow(String name) { - if (cflow == null) - cflow = new Hashtable(); - - return (Object[])cflow.get(name); - } - - /** - * Reads a class file and constructs a CtClass - * object with a new name. - * This method is useful if you want to generate a new class as a copy - * of another class (except the class name). For example, - * - * 

-     * getAndRename("Point", "Pair")
-     *
- * - * returns a CtClass object representing Pair - * class. The definition of Pair is the same as that of - * Point class except the class name since Pair - * is defined by reading Point.class. - * - * @param orgName the original (fully-qualified) class name - * @param newName the new class name - */ - public CtClass getAndRename(String orgName, String newName) - throws NotFoundException - { - CtClass clazz = get0(orgName, false); - if (clazz == null) - throw new NotFoundException(orgName); - - if (clazz instanceof CtClassType) - ((CtClassType)clazz).setClassPool(this); - - clazz.setName(newName); // indirectly calls - // classNameChanged() in this class - return clazz; - } - - /* - * This method is invoked by CtClassType.setName(). It removes a - * CtClass object from the hash table and inserts it with the new - * name. Don't delegate to the parent. - */ - synchronized void classNameChanged(String oldname, CtClass clazz) { - CtClass c = (CtClass)getCached(oldname); - if (c == clazz) // must check this equation. - removeCached(oldname); // see getAndRename(). - - String newName = clazz.getName(); - checkNotFrozen(newName); - cacheCtClass(newName, clazz, false); - } - - /** - * Reads a class file from the source and returns a reference - * to the CtClass - * object representing that class file. If that class file has been - * already read, this method returns a reference to the - * CtClass created when that class file was read at the - * first time. - * - *

If classname ends with "[]", then this method - * returns a CtClass object for that array type. - * - *

To obtain an inner class, use "$" instead of "." for separating - * the enclosing class name and the inner class name. - * - * @param classname a fully-qualified class name. - */ - public CtClass get(String classname) throws NotFoundException { - CtClass clazz; - if (classname == null) - clazz = null; - else - clazz = get0(classname, true); - - if (clazz == null) - throw new NotFoundException(classname); - else { - clazz.incGetCounter(); - return clazz; - } - } - - /** - * Reads a class file from the source and returns a reference - * to the CtClass - * object representing that class file. - * This method is equivalent to get except - * that it returns null when a class file is - * not found and it never throws an exception. - * - * @param classname a fully-qualified class name. - * @return a CtClass object or null. - * @see #get(String) - * @see #find(String) - * @since 3.13 - */ - public CtClass getOrNull(String classname) { - CtClass clazz = null; - if (classname == null) - clazz = null; - else - try { - /* ClassPool.get0() never throws an exception - but its subclass may implement get0 that - may throw an exception. - */ - clazz = get0(classname, true); - } - catch (NotFoundException e){} - - if (clazz != null) - clazz.incGetCounter(); - - return clazz; - } - - /** - * Returns a CtClass object with the given name. - * This is almost equivalent to get(String) except - * that classname can be an array-type "descriptor" (an encoded - * type name) such as [Ljava/lang/Object;. - * - *

Using this method is not recommended; this method should be - * used only to obtain the CtClass object - * with a name returned from getClassInfo in - * javassist.bytecode.ClassPool. getClassInfo - * returns a fully-qualified class name but, if the class is an array - * type, it returns a descriptor. - * - * @param classname a fully-qualified class name or a descriptor - * representing an array type. - * @see #get(String) - * @see javassist.bytecode.ConstPool#getClassInfo(int) - * @see javassist.bytecode.Descriptor#toCtClass(String, ClassPool) - * @since 3.8.1 - */ - public CtClass getCtClass(String classname) throws NotFoundException { - if (classname.charAt(0) == '[') - return Descriptor.toCtClass(classname, this); - else - return get(classname); - } - - /** - * @param useCache false if the cached CtClass must be ignored. - * @return null if the class could not be found. - */ - protected synchronized CtClass get0(String classname, boolean useCache) - throws NotFoundException - { - CtClass clazz = null; - if (useCache) { - clazz = getCached(classname); - if (clazz != null) - return clazz; - } - - if (!childFirstLookup && parent != null) { - clazz = parent.get0(classname, useCache); - if (clazz != null) - return clazz; - } - - clazz = createCtClass(classname, useCache); - if (clazz != null) { - // clazz.getName() != classname if classname is "[L;". - if (useCache) - cacheCtClass(clazz.getName(), clazz, false); - - return clazz; - } - - if (childFirstLookup && parent != null) - clazz = parent.get0(classname, useCache); - - return clazz; - } - - /** - * Creates a CtClass object representing the specified class. - * It first examines whether or not the corresponding class - * file exists. If yes, it creates a CtClass object. - * - * @return null if the class file could not be found. - */ - protected CtClass createCtClass(String classname, boolean useCache) { - // accept "[L;" as a class name. - if (classname.charAt(0) == '[') - classname = Descriptor.toClassName(classname); - - if (classname.endsWith("[]")) { - String base = classname.substring(0, classname.indexOf('[')); - if ((!useCache || getCached(base) == null) && find(base) == null) - return null; - else - return new CtArray(classname, this); - } - else - if (find(classname) == null) - return null; - else - return new CtClassType(classname, this); - } - - /** - * Searches the class path to obtain the URL of the class file - * specified by classname. It is also used to determine whether - * the class file exists. - * - * @param classname a fully-qualified class name. - * @return null if the class file could not be found. - * @see CtClass#getURL() - */ - public URL find(String classname) { - return source.find(classname); - } - - /* - * Is invoked by CtClassType.setName() and methods in this class. - * This method throws an exception if the class is already frozen or - * if this class pool cannot edit the class since it is in a parent - * class pool. - * - * @see checkNotExists(String) - */ - void checkNotFrozen(String classname) throws RuntimeException { - CtClass clazz = getCached(classname); - if (clazz == null) { - if (!childFirstLookup && parent != null) { - try { - clazz = parent.get0(classname, true); - } - catch (NotFoundException e) {} - if (clazz != null) - throw new RuntimeException(classname - + " is in a parent ClassPool. Use the parent."); - } - } - else - if (clazz.isFrozen()) - throw new RuntimeException(classname - + ": frozen class (cannot edit)"); - } - - /* - * This method returns null if this or its parent class pool does - * not contain a CtClass object with the class name. - * - * @see checkNotFrozen(String) - */ - CtClass checkNotExists(String classname) { - CtClass clazz = getCached(classname); - if (clazz == null) - if (!childFirstLookup && parent != null) { - try { - clazz = parent.get0(classname, true); - } - catch (NotFoundException e) {} - } - - return clazz; - } - - /* for CtClassType.getClassFile2(). Don't delegate to the parent. - */ - InputStream openClassfile(String classname) throws NotFoundException { - return source.openClassfile(classname); - } - - void writeClassfile(String classname, OutputStream out) - throws NotFoundException, IOException, CannotCompileException - { - source.writeClassfile(classname, out); - } - - /** - * Reads class files from the source and returns an array of - * CtClass - * objects representing those class files. - * - *

If an element of classnames ends with "[]", - * then this method - * returns a CtClass object for that array type. - * - * @param classnames an array of fully-qualified class name. - */ - public CtClass[] get(String[] classnames) throws NotFoundException { - if (classnames == null) - return new CtClass[0]; - - int num = classnames.length; - CtClass[] result = new CtClass[num]; - for (int i = 0; i < num; ++i) - result[i] = get(classnames[i]); - - return result; - } - - /** - * Reads a class file and obtains a compile-time method. - * - * @param classname the class name - * @param methodname the method name - * @see CtClass#getDeclaredMethod(String) - */ - public CtMethod getMethod(String classname, String methodname) - throws NotFoundException - { - CtClass c = get(classname); - return c.getDeclaredMethod(methodname); - } - - /** - * Creates a new class (or interface) from the given class file. - * If there already exists a class with the same name, the new class - * overwrites that previous class. - * - *

This method is used for creating a CtClass object - * directly from a class file. The qualified class name is obtained - * from the class file; you do not have to explicitly give the name. - * - * @param classfile class file. - * @throws RuntimeException if there is a frozen class with the - * the same name. - * @see #makeClassIfNew(InputStream) - * @see javassist.ByteArrayClassPath - */ - public CtClass makeClass(InputStream classfile) - throws IOException, RuntimeException - { - return makeClass(classfile, true); - } - - /** - * Creates a new class (or interface) from the given class file. - * If there already exists a class with the same name, the new class - * overwrites that previous class. - * - *

This method is used for creating a CtClass object - * directly from a class file. The qualified class name is obtained - * from the class file; you do not have to explicitly give the name. - * - * @param classfile class file. - * @param ifNotFrozen throws a RuntimeException if this parameter is true - * and there is a frozen class with the same name. - * @see javassist.ByteArrayClassPath - */ - public CtClass makeClass(InputStream classfile, boolean ifNotFrozen) - throws IOException, RuntimeException - { - compress(); - classfile = new BufferedInputStream(classfile); - CtClass clazz = new CtClassType(classfile, this); - clazz.checkModify(); - String classname = clazz.getName(); - if (ifNotFrozen) - checkNotFrozen(classname); - - cacheCtClass(classname, clazz, true); - return clazz; - } - - /** - * Creates a new class (or interface) from the given class file. - * If there already exists a class with the same name, the new class - * overwrites that previous class. - * - *

This method is used for creating a CtClass object - * directly from a class file. The qualified class name is obtained - * from the class file; you do not have to explicitly give the name. - * - * @param classfile class file. - * @throws RuntimeException if there is a frozen class with the - * the same name. - * @since 3.20 - */ - public CtClass makeClass(ClassFile classfile) - throws RuntimeException - { - return makeClass(classfile, true); - } - - /** - * Creates a new class (or interface) from the given class file. - * If there already exists a class with the same name, the new class - * overwrites that previous class. - * - *

This method is used for creating a CtClass object - * directly from a class file. The qualified class name is obtained - * from the class file; you do not have to explicitly give the name. - * - * @param classfile class file. - * @param ifNotFrozen throws a RuntimeException if this parameter is true - * and there is a frozen class with the same name. - * @since 3.20 - */ - public CtClass makeClass(ClassFile classfile, boolean ifNotFrozen) - throws RuntimeException - { - compress(); - CtClass clazz = new CtClassType(classfile, this); - clazz.checkModify(); - String classname = clazz.getName(); - if (ifNotFrozen) - checkNotFrozen(classname); - - cacheCtClass(classname, clazz, true); - return clazz; - } - - /** - * Creates a new class (or interface) from the given class file. - * If there already exists a class with the same name, this method - * returns the existing class; a new class is never created from - * the given class file. - * - *

This method is used for creating a CtClass object - * directly from a class file. The qualified class name is obtained - * from the class file; you do not have to explicitly give the name. - * - * @param classfile the class file. - * @see #makeClass(InputStream) - * @see javassist.ByteArrayClassPath - * @since 3.9 - */ - public CtClass makeClassIfNew(InputStream classfile) - throws IOException, RuntimeException - { - compress(); - classfile = new BufferedInputStream(classfile); - CtClass clazz = new CtClassType(classfile, this); - clazz.checkModify(); - String classname = clazz.getName(); - CtClass found = checkNotExists(classname); - if (found != null) - return found; - else { - cacheCtClass(classname, clazz, true); - return clazz; - } - } - - /** - * Creates a new public class. - * If there already exists a class with the same name, the new class - * overwrites that previous class. - * - *

If no constructor is explicitly added to the created new - * class, Javassist generates constructors and adds it when - * the class file is generated. It generates a new constructor - * for each constructor of the super class. The new constructor - * takes the same set of parameters and invokes the - * corresponding constructor of the super class. All the received - * parameters are passed to it. - * - * @param classname a fully-qualified class name. - * @throws RuntimeException if the existing class is frozen. - */ - public CtClass makeClass(String classname) throws RuntimeException { - return makeClass(classname, null); - } - - /** - * Creates a new public class. - * If there already exists a class/interface with the same name, - * the new class overwrites that previous class. - * - *

If no constructor is explicitly added to the created new - * class, Javassist generates constructors and adds it when - * the class file is generated. It generates a new constructor - * for each constructor of the super class. The new constructor - * takes the same set of parameters and invokes the - * corresponding constructor of the super class. All the received - * parameters are passed to it. - * - * @param classname a fully-qualified class name. - * @param superclass the super class. - * @throws RuntimeException if the existing class is frozen. - */ - public synchronized CtClass makeClass(String classname, CtClass superclass) - throws RuntimeException - { - checkNotFrozen(classname); - CtClass clazz = new CtNewClass(classname, this, false, superclass); - cacheCtClass(classname, clazz, true); - return clazz; - } - - /** - * Creates a new public nested class. - * This method is called by {@link CtClassType#makeNestedClass()}. - * - * @param classname a fully-qualified class name. - * @return the nested class. - */ - synchronized CtClass makeNestedClass(String classname) { - checkNotFrozen(classname); - CtClass clazz = new CtNewNestedClass(classname, this, false, null); - cacheCtClass(classname, clazz, true); - return clazz; - } - - /** - * Creates a new public interface. - * If there already exists a class/interface with the same name, - * the new interface overwrites that previous one. - * - * @param name a fully-qualified interface name. - * @throws RuntimeException if the existing interface is frozen. - */ - public CtClass makeInterface(String name) throws RuntimeException { - return makeInterface(name, null); - } - - /** - * Creates a new public interface. - * If there already exists a class/interface with the same name, - * the new interface overwrites that previous one. - * - * @param name a fully-qualified interface name. - * @param superclass the super interface. - * @throws RuntimeException if the existing interface is frozen. - */ - public synchronized CtClass makeInterface(String name, CtClass superclass) - throws RuntimeException - { - checkNotFrozen(name); - CtClass clazz = new CtNewClass(name, this, true, superclass); - cacheCtClass(name, clazz, true); - return clazz; - } - - /** - * Creates a new annotation. - * If there already exists a class/interface with the same name, - * the new interface overwrites that previous one. - * - * @param name a fully-qualified interface name. - * Or null if the annotation has no super interface. - * @throws RuntimeException if the existing interface is frozen. - * @since 3.19 - */ - public CtClass makeAnnotation(String name) throws RuntimeException { - try { - CtClass cc = makeInterface(name, get("java.lang.annotation.Annotation")); - cc.setModifiers(cc.getModifiers() | Modifier.ANNOTATION); - return cc; - } - catch (NotFoundException e) { - // should never happen. - throw new RuntimeException(e.getMessage(), e); - } - } - - /** - * Appends the system search path to the end of the - * search path. The system search path - * usually includes the platform library, extension - * libraries, and the search path specified by the - * -classpath option or the CLASSPATH - * environment variable. - * - * @return the appended class path. - */ - public ClassPath appendSystemPath() { - return source.appendSystemPath(); - } - - /** - * Insert a ClassPath object at the head of the - * search path. - * - * @return the inserted class path. - * @see javassist.ClassPath - * @see javassist.URLClassPath - * @see javassist.ByteArrayClassPath - */ - public ClassPath insertClassPath(ClassPath cp) { - return source.insertClassPath(cp); - } - - /** - * Appends a ClassPath object to the end of the - * search path. - * - * @return the appended class path. - * @see javassist.ClassPath - * @see javassist.URLClassPath - * @see javassist.ByteArrayClassPath - */ - public ClassPath appendClassPath(ClassPath cp) { - return source.appendClassPath(cp); - } - - /** - * Inserts a directory or a jar (or zip) file at the head of the - * search path. - * - * @param pathname the path name of the directory or jar file. - * It must not end with a path separator ("/"). - * If the path name ends with "/*", then all the - * jar files matching the path name are inserted. - * - * @return the inserted class path. - * @throws NotFoundException if the jar file is not found. - */ - public ClassPath insertClassPath(String pathname) - throws NotFoundException - { - return source.insertClassPath(pathname); - } - - /** - * Appends a directory or a jar (or zip) file to the end of the - * search path. - * - * @param pathname the path name of the directory or jar file. - * It must not end with a path separator ("/"). - * If the path name ends with "/*", then all the - * jar files matching the path name are appended. - * - * @return the appended class path. - * @throws NotFoundException if the jar file is not found. - */ - public ClassPath appendClassPath(String pathname) - throws NotFoundException - { - return source.appendClassPath(pathname); - } - - /** - * Detatches the ClassPath object from the search path. - * The detached ClassPath object cannot be added - * to the path again. - */ - public void removeClassPath(ClassPath cp) { - source.removeClassPath(cp); - } - - /** - * Appends directories and jar files for search. - * - *

The elements of the given path list must be separated by colons - * in Unix or semi-colons in Windows. - * - * @param pathlist a (semi)colon-separated list of - * the path names of directories and jar files. - * The directory name must not end with a path - * separator ("/"). - * @throws NotFoundException if a jar file is not found. - */ - public void appendPathList(String pathlist) throws NotFoundException { - char sep = File.pathSeparatorChar; - int i = 0; - for (;;) { - int j = pathlist.indexOf(sep, i); - if (j < 0) { - appendClassPath(pathlist.substring(i)); - break; - } - else { - appendClassPath(pathlist.substring(i, j)); - i = j + 1; - } - } - } - - /** - * Converts the given class to a java.lang.Class object. - * Once this method is called, further modifications are not - * allowed any more. - * To load the class, this method uses the context class loader - * of the current thread. It is obtained by calling - * getClassLoader(). - * - *

This behavior can be changed by subclassing the pool and changing - * the getClassLoader() method. - * If the program is running on some application - * server, the context class loader might be inappropriate to load the - * class. - * - *

This method is provided for convenience. If you need more - * complex functionality, you should write your own class loader. - * - *

Warining: A Class object returned by this method may not - * work with a security manager or a signed jar file because a - * protection domain is not specified. - * - * @see #toClass(CtClass, java.lang.ClassLoader, ProtectionDomain) - * @see #getClassLoader() - */ - public Class toClass(CtClass clazz) throws CannotCompileException { - // Some subclasses of ClassPool may override toClass(CtClass,ClassLoader). - // So we should call that method instead of toClass(.., ProtectionDomain). - return toClass(clazz, getClassLoader()); - } - - /** - * Get the classloader for toClass(), getAnnotations() in - * CtClass, etc. - * - *

The default is the context class loader. - * - * @return the classloader for the pool - * @see #toClass(CtClass) - * @see CtClass#getAnnotations() - */ - public ClassLoader getClassLoader() { - return getContextClassLoader(); - } - - /** - * Obtains a class loader that seems appropriate to look up a class - * by name. - */ - static ClassLoader getContextClassLoader() { - return Thread.currentThread().getContextClassLoader(); - } - - /** - * Converts the class to a java.lang.Class object. - * Do not override this method any more at a subclass because - * toClass(CtClass) never calls this method. - * - *

Warining: A Class object returned by this method may not - * work with a security manager or a signed jar file because a - * protection domain is not specified. - * - * @deprecated Replaced by {@link #toClass(CtClass,ClassLoader,ProtectionDomain)}. - * A subclass of ClassPool that has been - * overriding this method should be modified. It should override - * {@link #toClass(CtClass,ClassLoader,ProtectionDomain)}. - */ - public Class toClass(CtClass ct, ClassLoader loader) - throws CannotCompileException - { - return toClass(ct, loader, null); - } - - /** - * Converts the class to a java.lang.Class object. - * Once this method is called, further modifications are not allowed - * any more. - * - *

The class file represented by the given CtClass is - * loaded by the given class loader to construct a - * java.lang.Class object. Since a private method - * on the class loader is invoked through the reflection API, - * the caller must have permissions to do that. - * - *

An easy way to obtain ProtectionDomain object is - * to call getProtectionDomain() - * in java.lang.Class. It returns the domain that the - * class belongs to. - * - *

This method is provided for convenience. If you need more - * complex functionality, you should write your own class loader. - * - * @param loader the class loader used to load this class. - * For example, the loader returned by - * getClassLoader() can be used - * for this parameter. - * @param domain the protection domain for the class. - * If it is null, the default domain created - * by java.lang.ClassLoader is used. - * - * @see #getClassLoader() - * @since 3.3 - */ - public Class toClass(CtClass ct, ClassLoader loader, ProtectionDomain domain) - throws CannotCompileException - { - try { - byte[] b = ct.toBytecode(); - java.lang.reflect.Method method; - Object[] args; - if (domain == null) { - method = defineClass1; - args = new Object[] { ct.getName(), b, new Integer(0), - new Integer(b.length)}; - } - else { - method = defineClass2; - args = new Object[] { ct.getName(), b, new Integer(0), - new Integer(b.length), domain}; - } - - return (Class)toClass2(method, loader, args); - } - catch (RuntimeException e) { - throw e; - } - catch (java.lang.reflect.InvocationTargetException e) { - throw new CannotCompileException(e.getTargetException()); - } - catch (Exception e) { - throw new CannotCompileException(e); - } - } - - private static synchronized Object toClass2(Method method, - ClassLoader loader, Object[] args) - throws Exception - { - method.setAccessible(true); - try { - return method.invoke(loader, args); - } - finally { - method.setAccessible(false); - } - } - - /** - * Defines a new package. If the package is already defined, this method - * performs nothing. - * - *

You do not necessarily need to - * call this method. If this method is called, then - * getPackage() on the Class object returned - * by toClass() will return a non-null object. - * - * @param loader the class loader passed to toClass() or - * the default one obtained by getClassLoader(). - * @param name the package name. - * @see #getClassLoader() - * @see #toClass(CtClass) - * @see CtClass#toClass() - * @since 3.16 - */ - public void makePackage(ClassLoader loader, String name) - throws CannotCompileException - { - Object[] args = new Object[] { - name, null, null, null, null, null, null, null }; - Throwable t; - try { - toClass2(definePackage, loader, args); - return; - } - catch (java.lang.reflect.InvocationTargetException e) { - t = e.getTargetException(); - if (t == null) - t = e; - else if (t instanceof IllegalArgumentException) { - // if the package is already defined, an IllegalArgumentException - // is thrown. - return; - } - } - catch (Exception e) { - t = e; - } - - throw new CannotCompileException(t); - } -} diff --git a/src/com/wenshuo/agent/javassist/ClassPoolTail.java b/src/com/wenshuo/agent/javassist/ClassPoolTail.java deleted file mode 100644 index 638d201..0000000 --- a/src/com/wenshuo/agent/javassist/ClassPoolTail.java +++ /dev/null @@ -1,430 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.*; -import java.util.jar.*; -import java.net.MalformedURLException; -import java.net.URL; -import java.util.Hashtable; - -final class ClassPathList { - ClassPathList next; - ClassPath path; - - ClassPathList(ClassPath p, ClassPathList n) { - next = n; - path = p; - } -} - -final class DirClassPath implements ClassPath { - String directory; - - DirClassPath(String dirName) { - directory = dirName; - } - - public InputStream openClassfile(String classname) { - try { - char sep = File.separatorChar; - String filename = directory + sep - + classname.replace('.', sep) + ".class"; - return new FileInputStream(filename.toString()); - } - catch (FileNotFoundException e) {} - catch (SecurityException e) {} - return null; - } - - public URL find(String classname) { - char sep = File.separatorChar; - String filename = directory + sep - + classname.replace('.', sep) + ".class"; - File f = new File(filename); - if (f.exists()) - try { - return f.getCanonicalFile().toURI().toURL(); - } - catch (MalformedURLException e) {} - catch (IOException e) {} - - return null; - } - - public void close() {} - - public String toString() { - return directory; - } -} - -final class JarDirClassPath implements ClassPath { - JarClassPath[] jars; - - JarDirClassPath(String dirName) throws NotFoundException { - File[] files = new File(dirName).listFiles(new FilenameFilter() { - public boolean accept(File dir, String name) { - name = name.toLowerCase(); - return name.endsWith(".jar") || name.endsWith(".zip"); - } - }); - - if (files != null) { - jars = new JarClassPath[files.length]; - for (int i = 0; i < files.length; i++) - jars[i] = new JarClassPath(files[i].getPath()); - } - } - - public InputStream openClassfile(String classname) throws NotFoundException { - if (jars != null) - for (int i = 0; i < jars.length; i++) { - InputStream is = jars[i].openClassfile(classname); - if (is != null) - return is; - } - - return null; // not found - } - - public URL find(String classname) { - if (jars != null) - for (int i = 0; i < jars.length; i++) { - URL url = jars[i].find(classname); - if (url != null) - return url; - } - - return null; // not found - } - - public void close() { - if (jars != null) - for (int i = 0; i < jars.length; i++) - jars[i].close(); - } -} - -final class JarClassPath implements ClassPath { - JarFile jarfile; - String jarfileURL; - - JarClassPath(String pathname) throws NotFoundException { - try { - jarfile = new JarFile(pathname); - jarfileURL = new File(pathname).getCanonicalFile() - .toURI().toURL().toString(); - return; - } - catch (IOException e) {} - throw new NotFoundException(pathname); - } - - public InputStream openClassfile(String classname) - throws NotFoundException - { - try { - String jarname = classname.replace('.', '/') + ".class"; - JarEntry je = jarfile.getJarEntry(jarname); - if (je != null) - return jarfile.getInputStream(je); - else - return null; // not found - } - catch (IOException e) {} - throw new NotFoundException("broken jar file?: " - + jarfile.getName()); - } - - public URL find(String classname) { - String jarname = classname.replace('.', '/') + ".class"; - JarEntry je = jarfile.getJarEntry(jarname); - if (je != null) - try { - return new URL("jar:" + jarfileURL + "!/" + jarname); - } - catch (MalformedURLException e) {} - - return null; // not found - } - - public void close() { - try { - jarfile.close(); - jarfile = null; - } - catch (IOException e) {} - } - - public String toString() { - return jarfile == null ? "" : jarfile.toString(); - } -} - -final class ClassPoolTail { - protected ClassPathList pathList; - - public ClassPoolTail() { - pathList = null; - } - - public String toString() { - StringBuffer buf = new StringBuffer(); - buf.append("[class path: "); - ClassPathList list = pathList; - while (list != null) { - buf.append(list.path.toString()); - buf.append(File.pathSeparatorChar); - list = list.next; - } - - buf.append(']'); - return buf.toString(); - } - - public synchronized ClassPath insertClassPath(ClassPath cp) { - pathList = new ClassPathList(cp, pathList); - return cp; - } - - public synchronized ClassPath appendClassPath(ClassPath cp) { - ClassPathList tail = new ClassPathList(cp, null); - ClassPathList list = pathList; - if (list == null) - pathList = tail; - else { - while (list.next != null) - list = list.next; - - list.next = tail; - } - - return cp; - } - - public synchronized void removeClassPath(ClassPath cp) { - ClassPathList list = pathList; - if (list != null) - if (list.path == cp) - pathList = list.next; - else { - while (list.next != null) - if (list.next.path == cp) - list.next = list.next.next; - else - list = list.next; - } - - cp.close(); - } - - public ClassPath appendSystemPath() { - return appendClassPath(new ClassClassPath()); - } - - public ClassPath insertClassPath(String pathname) - throws NotFoundException - { - return insertClassPath(makePathObject(pathname)); - } - - public ClassPath appendClassPath(String pathname) - throws NotFoundException - { - return appendClassPath(makePathObject(pathname)); - } - - private static ClassPath makePathObject(String pathname) - throws NotFoundException - { - String lower = pathname.toLowerCase(); - if (lower.endsWith(".jar") || lower.endsWith(".zip")) - return new JarClassPath(pathname); - - int len = pathname.length(); - if (len > 2 && pathname.charAt(len - 1) == '*' - && (pathname.charAt(len - 2) == '/' - || pathname.charAt(len - 2) == File.separatorChar)) { - String dir = pathname.substring(0, len - 2); - return new JarDirClassPath(dir); - } - - return new DirClassPath(pathname); - } - - /** - * This method does not close the output stream. - */ - void writeClassfile(String classname, OutputStream out) - throws NotFoundException, IOException, CannotCompileException - { - InputStream fin = openClassfile(classname); - if (fin == null) - throw new NotFoundException(classname); - - try { - copyStream(fin, out); - } - finally { - fin.close(); - } - } - - /* - -- faster version -- - void checkClassName(String classname) throws NotFoundException { - if (find(classname) == null) - throw new NotFoundException(classname); - } - - -- slower version -- - - void checkClassName(String classname) throws NotFoundException { - InputStream fin = openClassfile(classname); - try { - fin.close(); - } - catch (IOException e) {} - } - */ - - - /** - * Opens the class file for the class specified by - * classname. - * - * @param classname a fully-qualified class name - * @return null if the file has not been found. - * @throws NotFoundException if any error is reported by ClassPath. - */ - InputStream openClassfile(String classname) - throws NotFoundException - { - ClassPathList list = pathList; - InputStream ins = null; - NotFoundException error = null; - while (list != null) { - try { - ins = list.path.openClassfile(classname); - } - catch (NotFoundException e) { - if (error == null) - error = e; - } - - if (ins == null) - list = list.next; - else - return ins; - } - - if (error != null) - throw error; - else - return null; // not found - } - - /** - * Searches the class path to obtain the URL of the class file - * specified by classname. It is also used to determine whether - * the class file exists. - * - * @param classname a fully-qualified class name. - * @return null if the class file could not be found. - */ - public URL find(String classname) { - ClassPathList list = pathList; - URL url = null; - while (list != null) { - url = list.path.find(classname); - if (url == null) - list = list.next; - else - return url; - } - - return null; - } - - /** - * Reads from an input stream until it reaches the end. - * - * @return the contents of that input stream - */ - public static byte[] readStream(InputStream fin) throws IOException { - byte[][] bufs = new byte[8][]; - int bufsize = 4096; - - for (int i = 0; i < 8; ++i) { - bufs[i] = new byte[bufsize]; - int size = 0; - int len = 0; - do { - len = fin.read(bufs[i], size, bufsize - size); - if (len >= 0) - size += len; - else { - byte[] result = new byte[bufsize - 4096 + size]; - int s = 0; - for (int j = 0; j < i; ++j) { - System.arraycopy(bufs[j], 0, result, s, s + 4096); - s = s + s + 4096; - } - - System.arraycopy(bufs[i], 0, result, s, size); - return result; - } - } while (size < bufsize); - bufsize *= 2; - } - - throw new IOException("too much data"); - } - - /** - * Reads from an input stream and write to an output stream - * until it reaches the end. This method does not close the - * streams. - */ - public static void copyStream(InputStream fin, OutputStream fout) - throws IOException - { - int bufsize = 4096; - byte[] buf = null; - for (int i = 0; i < 64; ++i) { - if (i < 8) { - bufsize *= 2; - buf = new byte[bufsize]; - } - int size = 0; - int len = 0; - do { - len = fin.read(buf, size, bufsize - size); - if (len >= 0) - size += len; - else { - fout.write(buf, 0, size); - return; - } - } while (size < bufsize); - fout.write(buf); - } - - throw new IOException("too much data"); - } -} diff --git a/src/com/wenshuo/agent/javassist/CodeConverter.java b/src/com/wenshuo/agent/javassist/CodeConverter.java deleted file mode 100644 index 5bd3014..0000000 --- a/src/com/wenshuo/agent/javassist/CodeConverter.java +++ /dev/null @@ -1,809 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.convert.*; - -/** - * Simple translator of method bodies - * (also see the javassist.expr package). - * - *

Instances of this class specifies how to instrument of the - * bytecodes representing a method body. They are passed to - * CtClass.instrument() or - * CtMethod.instrument() as a parameter. - * - *

Example: - * 

- * ClassPool cp = ClassPool.getDefault();
- * CtClass point = cp.get("Point");
- * CtClass singleton = cp.get("Singleton");
- * CtClass client = cp.get("Client");
- * CodeConverter conv = new CodeConverter();
- * conv.replaceNew(point, singleton, "makePoint");
- * client.instrument(conv);
- *
- * - *

This program substitutes "Singleton.makePoint()" - * for all occurrences of "new Point()" - * appearing in methods declared in a Client class. - * - * @see javassist.CtClass#instrument(CodeConverter) - * @see javassist.CtMethod#instrument(CodeConverter) - * @see javassist.expr.ExprEditor - */ -public class CodeConverter { - protected Transformer transformers = null; - - /** - * Modify a method body so that instantiation of the specified class - * is replaced with a call to the specified static method. For example, - * replaceNew(ctPoint, ctSingleton, "createPoint") - * (where ctPoint and ctSingleton are - * compile-time classes for class Point and class - * Singleton, respectively) - * replaces all occurrences of: - * - * 

new Point(x, y)
- * - * in the method body with: - * - * 
Singleton.createPoint(x, y)
- * - *

This enables to intercept instantiation of Point - * and change the samentics. For example, the following - * createPoint() implements the singleton pattern: - * - * 

public static Point createPoint(int x, int y) {
-     *     if (aPoint == null)
-     *         aPoint = new Point(x, y);
-     *     return aPoint;
-     * }
-     *
- * - *

The static method call substituted for the original new - * expression must be - * able to receive the same set of parameters as the original - * constructor. If there are multiple constructors with different - * parameter types, then there must be multiple static methods - * with the same name but different parameter types. - * - *

The return type of the substituted static method must be - * the exactly same as the type of the instantiated class specified by - * newClass. - * - * @param newClass the instantiated class. - * @param calledClass the class in which the static method is - * declared. - * @param calledMethod the name of the static method. - */ - public void replaceNew(CtClass newClass, - CtClass calledClass, String calledMethod) { - transformers = new TransformNew(transformers, newClass.getName(), - calledClass.getName(), calledMethod); - } - - /** - * Modify a method body so that instantiation of the class - * specified by oldClass - * is replaced with instantiation of another class newClass. - * For example, - * replaceNew(ctPoint, ctPoint2) - * (where ctPoint and ctPoint2 are - * compile-time classes for class Point and class - * Point2, respectively) - * replaces all occurrences of: - * - * 

new Point(x, y)
- * - * in the method body with: - * - * 
new Point2(x, y)
- * - *

Note that Point2 must be type-compatible with Point. - * It must have the same set of methods, fields, and constructors as the - * replaced class. - */ - public void replaceNew(CtClass oldClass, CtClass newClass) { - transformers = new TransformNewClass(transformers, oldClass.getName(), - newClass.getName()); - } - - /** - * Modify a method body so that field read/write expressions access - * a different field from the original one. - * - *

Note that this method changes only the filed name and the class - * declaring the field; the type of the target object does not change. - * Therefore, the substituted field must be declared in the same class - * or a superclass of the original class. - * - *

Also, clazz and newClass must specify - * the class directly declaring the field. They must not specify - * a subclass of that class. - * - * @param field the originally accessed field. - * @param newClass the class declaring the substituted field. - * @param newFieldname the name of the substituted field. - */ - public void redirectFieldAccess(CtField field, - CtClass newClass, String newFieldname) { - transformers = new TransformFieldAccess(transformers, field, - newClass.getName(), - newFieldname); - } - - /** - * Modify a method body so that an expression reading the specified - * field is replaced with a call to the specified static method. - * This static method receives the target object of the original - * read expression as a parameter. It must return a value of - * the same type as the field. - * - *

For example, the program below - * - * 

Point p = new Point();
-     * int newX = p.x + 3;
- * - *

can be translated into: - * - * 

Point p = new Point();
-     * int newX = Accessor.readX(p) + 3;
- * - *

where - * - * 

public class Accessor {
-     *     public static int readX(Object target) { ... }
-     * }
- * - *

The type of the parameter of readX() must - * be java.lang.Object independently of the actual - * type of target. The return type must be the same - * as the field type. - * - * @param field the field. - * @param calledClass the class in which the static method is - * declared. - * @param calledMethod the name of the static method. - */ - public void replaceFieldRead(CtField field, - CtClass calledClass, String calledMethod) { - transformers = new TransformReadField(transformers, field, - calledClass.getName(), - calledMethod); - } - - /** - * Modify a method body so that an expression writing the specified - * field is replaced with a call to the specified static method. - * This static method receives two parameters: the target object of - * the original - * write expression and the assigned value. The return type of the - * static method is void. - * - *

For example, the program below - * - * 

Point p = new Point();
-     * p.x = 3;
- * - *

can be translated into: - * - * 

Point p = new Point();
-     * Accessor.writeX(3);
- * - *

where - * - * 

public class Accessor {
-     *     public static void writeX(Object target, int value) { ... }
-     * }
- * - *

The type of the first parameter of writeX() must - * be java.lang.Object independently of the actual - * type of target. The type of the second parameter - * is the same as the field type. - * - * @param field the field. - * @param calledClass the class in which the static method is - * declared. - * @param calledMethod the name of the static method. - */ - public void replaceFieldWrite(CtField field, - CtClass calledClass, String calledMethod) { - transformers = new TransformWriteField(transformers, field, - calledClass.getName(), - calledMethod); - } - - /** - * Modify a method body, so that ALL accesses to an array are replaced with - * calls to static methods within another class. In the case of reading an - * element from the array, this is replaced with a call to a static method with - * the array and the index as arguments, the return value is the value read from - * the array. If writing to an array, this is replaced with a call to a static - * method with the array, index and new value as parameters, the return value of - * the static method is void. - * - *

The calledClass parameter is the class containing the static methods to be used - * for array replacement. The names parameter points to an implementation of - * ArrayAccessReplacementMethodNames which specifies the names of the method to be - * used for access for each type of array. For example reading from an int[] will - * require a different method than if writing to an int[], and writing to a long[] - * will require a different method than if writing to a byte[]. If the implementation - * of ArrayAccessReplacementMethodNames does not contain the name for access for a - * type of array, that access is not replaced. - * - *

A default implementation of ArrayAccessReplacementMethodNames called - * DefaultArrayAccessReplacementMethodNames has been provided and is what is used in the - * following example. This also assumes that 'foo.ArrayAdvisor' is the name of the - * CtClass passed in. - * - *

If we have the following class: - * 

class POJO{
-     *    int[] ints = new int[]{1, 2, 3, 4, 5};
-     *    long[] longs = new int[]{10, 20, 30};
-     *    Object objects = new Object[]{true, false};
-     *    Integer[] integers = new Integer[]{new Integer(10)};
-     * }
-     *
- * and this is accessed as: - * 
POJO p = new POJO();
-     * 
-     * //Write to int array
-     * p.ints[2] = 7;
-     * 
-     * //Read from int array
-     * int i = p.ints[2];
-     * 
-     * //Write to long array
-     * p.longs[2] = 1000L;
-     * 
-     * //Read from long array
-     * long l = p.longs[2];
-     * 
-     * //Write to Object array
-     * p.objects[2] = "Hello";
-     * 
-     * //Read from Object array
-     * Object o = p.objects[2];
-     * 
-     * //Write to Integer array
-     * Integer integer = new Integer(5);
-     * p.integers[0] = integer;
-     * 
-     * //Read from Object array
-     * integer = p.integers[0];
-     *
- * - * Following instrumentation we will have - * 
POJO p = new POJO();
-     * 
-     * //Write to int array
-     * ArrayAdvisor.arrayWriteInt(p.ints, 2, 7);
-     * 
-     * //Read from int array
-     * int i = ArrayAdvisor.arrayReadInt(p.ints, 2);
-     * 
-     * //Write to long array
-     * ArrayAdvisor.arrayWriteLong(p.longs, 2, 1000L);
-     * 
-     * //Read from long array
-     * long l = ArrayAdvisor.arrayReadLong(p.longs, 2);
-     * 
-     * //Write to Object array
-     * ArrayAdvisor.arrayWriteObject(p.objects, 2, "Hello");
-     * 
-     * //Read from Object array
-     * Object o = ArrayAdvisor.arrayReadObject(p.objects, 2);
-     * 
-     * //Write to Integer array
-     * Integer integer = new Integer(5);
-     * ArrayAdvisor.arrayWriteObject(p.integers, 0, integer);
-     * 
-     * //Read from Object array
-     * integer = ArrayAdvisor.arrayWriteObject(p.integers, 0);
-     *
- * - * @see DefaultArrayAccessReplacementMethodNames - * - * @param calledClass the class containing the static methods. - * @param names contains the names of the methods to replace - * the different kinds of array access with. - */ - public void replaceArrayAccess(CtClass calledClass, ArrayAccessReplacementMethodNames names) - throws NotFoundException - { - transformers = new TransformAccessArrayField(transformers, calledClass.getName(), names); - } - - /** - * Modify method invocations in a method body so that a different - * method will be invoked. - * - *

Note that the target object, the parameters, or - * the type of invocation - * (static method call, interface call, or private method call) - * are not modified. Only the method name is changed. The substituted - * method must have the same signature that the original one has. - * If the original method is a static method, the substituted method - * must be static. - * - * @param origMethod original method - * @param substMethod substituted method - */ - public void redirectMethodCall(CtMethod origMethod, - CtMethod substMethod) - throws CannotCompileException - { - String d1 = origMethod.getMethodInfo2().getDescriptor(); - String d2 = substMethod.getMethodInfo2().getDescriptor(); - if (!d1.equals(d2)) - throw new CannotCompileException("signature mismatch: " - + substMethod.getLongName()); - - int mod1 = origMethod.getModifiers(); - int mod2 = substMethod.getModifiers(); - if (Modifier.isStatic(mod1) != Modifier.isStatic(mod2) - || (Modifier.isPrivate(mod1) && !Modifier.isPrivate(mod2)) - || origMethod.getDeclaringClass().isInterface() - != substMethod.getDeclaringClass().isInterface()) - throw new CannotCompileException("invoke-type mismatch " - + substMethod.getLongName()); - - transformers = new TransformCall(transformers, origMethod, - substMethod); - } - - /** - * Correct invocations to a method that has been renamed. - * If a method is renamed, calls to that method must be also - * modified so that the method with the new name will be called. - * - *

The method must be declared in the same class before and - * after it is renamed. - * - *

Note that the target object, the parameters, or - * the type of invocation - * (static method call, interface call, or private method call) - * are not modified. Only the method name is changed. - * - * @param oldMethodName the old name of the method. - * @param newMethod the method with the new name. - * @see javassist.CtMethod#setName(String) - */ - public void redirectMethodCall(String oldMethodName, - CtMethod newMethod) - throws CannotCompileException - { - transformers - = new TransformCall(transformers, oldMethodName, newMethod); - } - - /** - * Insert a call to another method before an existing method call. - * That "before" method must be static. The return type must be - * void. As parameters, the before method receives - * the target object and all the parameters to the originally invoked - * method. For example, if the originally invoked method is - * move(): - * - * 

class Point {
-     *     Point move(int x, int y) { ... }
-     * }
- * - *

Then the before method must be something like this: - * - * 

class Verbose {
-     *     static void print(Point target, int x, int y) { ... }
-     * }
- * - *

The CodeConverter would translate bytecode - * equivalent to: - * - * 

Point p2 = p.move(x + y, 0);
- * - *

into the bytecode equivalent to: - * - * 

int tmp1 = x + y;
-     * int tmp2 = 0;
-     * Verbose.print(p, tmp1, tmp2);
-     * Point p2 = p.move(tmp1, tmp2);
- * - * @param origMethod the method originally invoked. - * @param beforeMethod the method invoked before - * origMethod. - */ - public void insertBeforeMethod(CtMethod origMethod, - CtMethod beforeMethod) - throws CannotCompileException - { - try { - transformers = new TransformBefore(transformers, origMethod, - beforeMethod); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - /** - * Inserts a call to another method after an existing method call. - * That "after" method must be static. The return type must be - * void. As parameters, the after method receives - * the target object and all the parameters to the originally invoked - * method. For example, if the originally invoked method is - * move(): - * - * 
class Point {
-     *     Point move(int x, int y) { ... }
-     * }
- * - *

Then the after method must be something like this: - * - * 

class Verbose {
-     *     static void print(Point target, int x, int y) { ... }
-     * }
- * - *

The CodeConverter would translate bytecode - * equivalent to: - * - * 

Point p2 = p.move(x + y, 0);
- * - *

into the bytecode equivalent to: - * - * 

-     * int tmp1 = x + y;
-     * int tmp2 = 0;
-     * Point p2 = p.move(tmp1, tmp2);
-     * Verbose.print(p, tmp1, tmp2);
- * - * @param origMethod the method originally invoked. - * @param afterMethod the method invoked after - * origMethod. - */ - public void insertAfterMethod(CtMethod origMethod, - CtMethod afterMethod) - throws CannotCompileException - { - try { - transformers = new TransformAfter(transformers, origMethod, - afterMethod); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - /** - * Performs code conversion. - */ - protected void doit(CtClass clazz, MethodInfo minfo, ConstPool cp) - throws CannotCompileException - { - Transformer t; - CodeAttribute codeAttr = minfo.getCodeAttribute(); - if (codeAttr == null || transformers == null) - return; - for (t = transformers; t != null; t = t.getNext()) - t.initialize(cp, clazz, minfo); - - CodeIterator iterator = codeAttr.iterator(); - while (iterator.hasNext()) { - try { - int pos = iterator.next(); - for (t = transformers; t != null; t = t.getNext()) - pos = t.transform(clazz, pos, iterator, cp); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - int locals = 0; - int stack = 0; - for (t = transformers; t != null; t = t.getNext()) { - int s = t.extraLocals(); - if (s > locals) - locals = s; - - s = t.extraStack(); - if (s > stack) - stack = s; - } - - for (t = transformers; t != null; t = t.getNext()) - t.clean(); - - if (locals > 0) - codeAttr.setMaxLocals(codeAttr.getMaxLocals() + locals); - - if (stack > 0) - codeAttr.setMaxStack(codeAttr.getMaxStack() + stack); - - try { - minfo.rebuildStackMapIf6(clazz.getClassPool(), - clazz.getClassFile2()); - } - catch (BadBytecode b) { - throw new CannotCompileException(b.getMessage(), b); - } - } - - /** - * Interface containing the method names to be used - * as array access replacements. - * - * @author Kabir Khan - * @version $Revision: 1.16 $ - */ - public interface ArrayAccessReplacementMethodNames - { - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)B to replace reading from a byte[]. - */ - String byteOrBooleanRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;IB)V to replace writing to a byte[]. - */ - String byteOrBooleanWrite(); - - /** - * @return the name of a static method with the signature - * (Ljava/lang/Object;I)C to replace reading from a char[]. - */ - String charRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;IC)V to replace writing to a byte[]. - */ - String charWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)D to replace reading from a double[]. - */ - String doubleRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;ID)V to replace writing to a double[]. - */ - String doubleWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)F to replace reading from a float[]. - */ - String floatRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;IF)V to replace writing to a float[]. - */ - String floatWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)I to replace reading from a int[]. - */ - String intRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;II)V to replace writing to a int[]. - */ - String intWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)J to replace reading from a long[]. - */ - String longRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;IJ)V to replace writing to a long[]. - */ - String longWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)Ljava/lang/Object; - * to replace reading from a Object[] (or any subclass of object). - */ - String objectRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;ILjava/lang/Object;)V - * to replace writing to a Object[] (or any subclass of object). - */ - String objectWrite(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;I)S to replace reading from a short[]. - */ - String shortRead(); - - /** - * Returns the name of a static method with the signature - * (Ljava/lang/Object;IS)V to replace writing to a short[]. - */ - String shortWrite(); - } - - /** - * Default implementation of the ArrayAccessReplacementMethodNames - * interface giving default values for method names to be used for replacing - * accesses to array elements. - * - * @author Kabir Khan - * @version $Revision: 1.16 $ - */ - public static class DefaultArrayAccessReplacementMethodNames - implements ArrayAccessReplacementMethodNames - { - /** - * Returns "arrayReadByteOrBoolean" as the name of the static method with the signature - * (Ljava/lang/Object;I)B to replace reading from a byte[]. - */ - public String byteOrBooleanRead() - { - return "arrayReadByteOrBoolean"; - } - - /** - * Returns "arrayWriteByteOrBoolean" as the name of the static method with the signature - * (Ljava/lang/Object;IB)V to replace writing to a byte[]. - */ - public String byteOrBooleanWrite() - { - return "arrayWriteByteOrBoolean"; - } - - /** - * Returns "arrayReadChar" as the name of the static method with the signature - * (Ljava/lang/Object;I)C to replace reading from a char[]. - */ - public String charRead() - { - return "arrayReadChar"; - } - - /** - * Returns "arrayWriteChar" as the name of the static method with the signature - * (Ljava/lang/Object;IC)V to replace writing to a byte[]. - */ - public String charWrite() - { - return "arrayWriteChar"; - } - - /** - * Returns "arrayReadDouble" as the name of the static method with the signature - * (Ljava/lang/Object;I)D to replace reading from a double[]. - */ - public String doubleRead() - { - return "arrayReadDouble"; - } - - /** - * Returns "arrayWriteDouble" as the name of the static method with the signature - * (Ljava/lang/Object;ID)V to replace writing to a double[]. - */ - public String doubleWrite() - { - return "arrayWriteDouble"; - } - - /** - * Returns "arrayReadFloat" as the name of the static method with the signature - * (Ljava/lang/Object;I)F to replace reading from a float[]. - */ - public String floatRead() - { - return "arrayReadFloat"; - } - - /** - * Returns "arrayWriteFloat" as the name of the static method with the signature - * (Ljava/lang/Object;IF)V to replace writing to a float[]. - */ - public String floatWrite() - { - return "arrayWriteFloat"; - } - - /** - * Returns "arrayReadInt" as the name of the static method with the signature - * (Ljava/lang/Object;I)I to replace reading from a int[]. - */ - public String intRead() - { - return "arrayReadInt"; - } - - /** - * Returns "arrayWriteInt" as the name of the static method with the signature - * (Ljava/lang/Object;II)V to replace writing to a int[]. - */ - public String intWrite() - { - return "arrayWriteInt"; - } - - /** - * Returns "arrayReadLong" as the name of the static method with the signature - * (Ljava/lang/Object;I)J to replace reading from a long[]. - */ - public String longRead() - { - return "arrayReadLong"; - } - - /** - * Returns "arrayWriteLong" as the name of the static method with the signature - * (Ljava/lang/Object;IJ)V to replace writing to a long[]. - */ - public String longWrite() - { - return "arrayWriteLong"; - } - - /** - * Returns "arrayReadObject" as the name of the static method with the signature - * (Ljava/lang/Object;I)Ljava/lang/Object; to replace reading from a Object[] (or any subclass of object). - */ - public String objectRead() - { - return "arrayReadObject"; - } - - /** - * Returns "arrayWriteObject" as the name of the static method with the signature - * (Ljava/lang/Object;ILjava/lang/Object;)V to replace writing to a Object[] (or any subclass of object). - */ - public String objectWrite() - { - return "arrayWriteObject"; - } - - /** - * Returns "arrayReadShort" as the name of the static method with the signature - * (Ljava/lang/Object;I)S to replace reading from a short[]. - */ - public String shortRead() - { - return "arrayReadShort"; - } - - /** - * Returns "arrayWriteShort" as the name of the static method with the signature - * (Ljava/lang/Object;IS)V to replace writing to a short[]. - */ - public String shortWrite() - { - return "arrayWriteShort"; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtArray.java b/src/com/wenshuo/agent/javassist/CtArray.java deleted file mode 100644 index 3864c6a..0000000 --- a/src/com/wenshuo/agent/javassist/CtArray.java +++ /dev/null @@ -1,113 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -/** - * Array types. - */ -final class CtArray extends CtClass { - protected ClassPool pool; - - // the name of array type ends with "[]". - CtArray(String name, ClassPool cp) { - super(name); - pool = cp; - } - - public ClassPool getClassPool() { - return pool; - } - - public boolean isArray() { - return true; - } - - private CtClass[] interfaces = null; - - public int getModifiers() { - int mod = Modifier.FINAL; - try { - mod |= getComponentType().getModifiers() - & (Modifier.PROTECTED | Modifier.PUBLIC | Modifier.PRIVATE); - } - catch (NotFoundException e) {} - return mod; - } - - public CtClass[] getInterfaces() throws NotFoundException { - if (interfaces == null) { - Class[] intfs = Object[].class.getInterfaces(); - // java.lang.Cloneable and java.io.Serializable. - // If the JVM is CLDC, intfs is empty. - interfaces = new CtClass[intfs.length]; - for (int i = 0; i < intfs.length; i++) - interfaces[i] = pool.get(intfs[i].getName()); - } - - return interfaces; - } - - public boolean subtypeOf(CtClass clazz) throws NotFoundException { - if (super.subtypeOf(clazz)) - return true; - - String cname = clazz.getName(); - if (cname.equals(javaLangObject)) - return true; - - CtClass[] intfs = getInterfaces(); - for (int i = 0; i < intfs.length; i++) - if (intfs[i].subtypeOf(clazz)) - return true; - - return clazz.isArray() - && getComponentType().subtypeOf(clazz.getComponentType()); - } - - public CtClass getComponentType() throws NotFoundException { - String name = getName(); - return pool.get(name.substring(0, name.length() - 2)); - } - - public CtClass getSuperclass() throws NotFoundException { - return pool.get(javaLangObject); - } - - public CtMethod[] getMethods() { - try { - return getSuperclass().getMethods(); - } - catch (NotFoundException e) { - return super.getMethods(); - } - } - - public CtMethod getMethod(String name, String desc) - throws NotFoundException - { - return getSuperclass().getMethod(name, desc); - } - - public CtConstructor[] getConstructors() { - try { - return getSuperclass().getConstructors(); - } - catch (NotFoundException e) { - return super.getConstructors(); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtBehavior.java b/src/com/wenshuo/agent/javassist/CtBehavior.java deleted file mode 100644 index ff03e03..0000000 --- a/src/com/wenshuo/agent/javassist/CtBehavior.java +++ /dev/null @@ -1,1219 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.expr.ExprEditor; - -/** - * CtBehavior represents a method, a constructor, - * or a static constructor (class initializer). - * It is the abstract super class of - * CtMethod and CtConstructor. - * - *

To directly read or modify bytecode, obtain MethodInfo - * objects. - * - * @see #getMethodInfo() - */ -public abstract class CtBehavior extends CtMember { - protected MethodInfo methodInfo; - - protected CtBehavior(CtClass clazz, MethodInfo minfo) { - super(clazz); - methodInfo = minfo; - } - - /** - * @param isCons true if this is a constructor. - */ - void copy(CtBehavior src, boolean isCons, ClassMap map) - throws CannotCompileException - { - CtClass declaring = declaringClass; - MethodInfo srcInfo = src.methodInfo; - CtClass srcClass = src.getDeclaringClass(); - ConstPool cp = declaring.getClassFile2().getConstPool(); - - map = new ClassMap(map); - map.put(srcClass.getName(), declaring.getName()); - try { - boolean patch = false; - CtClass srcSuper = srcClass.getSuperclass(); - CtClass destSuper = declaring.getSuperclass(); - String destSuperName = null; - if (srcSuper != null && destSuper != null) { - String srcSuperName = srcSuper.getName(); - destSuperName = destSuper.getName(); - if (!srcSuperName.equals(destSuperName)) - if (srcSuperName.equals(CtClass.javaLangObject)) - patch = true; - else - map.putIfNone(srcSuperName, destSuperName); - } - - // a stack map table is copied from srcInfo. - methodInfo = new MethodInfo(cp, srcInfo.getName(), srcInfo, map); - if (isCons && patch) - methodInfo.setSuperclass(destSuperName); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - protected void extendToString(StringBuffer buffer) { - buffer.append(' '); - buffer.append(getName()); - buffer.append(' '); - buffer.append(methodInfo.getDescriptor()); - } - - /** - * Returns the method or constructor name followed by parameter types - * such as javassist.CtBehavior.stBody(String). - * - * @since 3.5 - */ - public abstract String getLongName(); - - /** - * Returns the MethodInfo representing this method/constructor in the - * class file. - * - *

If you modify the bytecode through the returned - * MethodInfo object, you might have to explicitly - * rebuild a stack map table. Javassist does not automatically - * rebuild it for avoiding unnecessary rebuilding. - * - * @see javassist.bytecode.MethodInfo#rebuildStackMap(ClassPool) - */ - public MethodInfo getMethodInfo() { - declaringClass.checkModify(); - return methodInfo; - } - - /** - * Returns the MethodInfo representing the method/constructor in the - * class file (read only). - * Normal applications do not need calling this method. Use - * getMethodInfo(). - * - *

The MethodInfo object obtained by this method - * is read only. Changes to this object might not be reflected - * on a class file generated by toBytecode(), - * toClass(), etc in CtClass. - * - *

This method is available even if the CtClass - * containing this method is frozen. However, if the class is - * frozen, the MethodInfo might be also pruned. - * - * @see #getMethodInfo() - * @see CtClass#isFrozen() - * @see CtClass#prune() - */ - public MethodInfo getMethodInfo2() { return methodInfo; } - - /** - * Obtains the modifiers of the method/constructor. - * - * @return modifiers encoded with - * javassist.Modifier. - * @see Modifier - */ - public int getModifiers() { - return AccessFlag.toModifier(methodInfo.getAccessFlags()); - } - - /** - * Sets the encoded modifiers of the method/constructor. - * - *

Changing the modifiers may cause a problem. - * For example, if a non-static method is changed to static, - * the method will be rejected by the bytecode verifier. - * - * @see Modifier - */ - public void setModifiers(int mod) { - declaringClass.checkModify(); - methodInfo.setAccessFlags(AccessFlag.of(mod)); - } - - /** - * Returns true if the class has the specified annotation class. - * - * @param clz the annotation class. - * @return true if the annotation is found, - * otherwise false. - * @since 3.11 - */ - public boolean hasAnnotation(Class clz) { - MethodInfo mi = getMethodInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.hasAnnotationType(clz, - getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the annotation if the class has the specified annotation class. - * For example, if an annotation @Author is associated - * with this method/constructor, an Author object is returned. - * The member values can be obtained by calling methods on - * the Author object. - * - * @param clz the annotation class. - * @return the annotation if found, otherwise null. - * @since 3.11 - */ - public Object getAnnotation(Class clz) throws ClassNotFoundException { - MethodInfo mi = getMethodInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.getAnnotationType(clz, - getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the annotations associated with this method or constructor. - * - * @return an array of annotation-type objects. - * @see #getAvailableAnnotations() - * @since 3.1 - */ - public Object[] getAnnotations() throws ClassNotFoundException { - return getAnnotations(false); - } - - /** - * Returns the annotations associated with this method or constructor. - * If any annotations are not on the classpath, they are not included - * in the returned array. - * - * @return an array of annotation-type objects. - * @see #getAnnotations() - * @since 3.3 - */ - public Object[] getAvailableAnnotations(){ - try{ - return getAnnotations(true); - } - catch (ClassNotFoundException e){ - throw new RuntimeException("Unexpected exception", e); - } - } - - private Object[] getAnnotations(boolean ignoreNotFound) - throws ClassNotFoundException - { - MethodInfo mi = getMethodInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - mi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.toAnnotationType(ignoreNotFound, - getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the parameter annotations associated with this method or constructor. - * - * @return an array of annotation-type objects. The length of the returned array is - * equal to the number of the formal parameters. If each parameter has no - * annotation, the elements of the returned array are empty arrays. - * - * @see #getAvailableParameterAnnotations() - * @see #getAnnotations() - * @since 3.1 - */ - public Object[][] getParameterAnnotations() throws ClassNotFoundException { - return getParameterAnnotations(false); - } - - /** - * Returns the parameter annotations associated with this method or constructor. - * If any annotations are not on the classpath, they are not included in the - * returned array. - * - * @return an array of annotation-type objects. The length of the returned array is - * equal to the number of the formal parameters. If each parameter has no - * annotation, the elements of the returned array are empty arrays. - * - * @see #getParameterAnnotations() - * @see #getAvailableAnnotations() - * @since 3.3 - */ - public Object[][] getAvailableParameterAnnotations(){ - try { - return getParameterAnnotations(true); - } - catch(ClassNotFoundException e) { - throw new RuntimeException("Unexpected exception", e); - } - } - - Object[][] getParameterAnnotations(boolean ignoreNotFound) - throws ClassNotFoundException - { - MethodInfo mi = getMethodInfo2(); - ParameterAnnotationsAttribute ainfo = (ParameterAnnotationsAttribute) - mi.getAttribute(ParameterAnnotationsAttribute.invisibleTag); - ParameterAnnotationsAttribute ainfo2 = (ParameterAnnotationsAttribute) - mi.getAttribute(ParameterAnnotationsAttribute.visibleTag); - return CtClassType.toAnnotationType(ignoreNotFound, - getDeclaringClass().getClassPool(), - ainfo, ainfo2, mi); - } - - /** - * Obtains parameter types of this method/constructor. - */ - public CtClass[] getParameterTypes() throws NotFoundException { - return Descriptor.getParameterTypes(methodInfo.getDescriptor(), - declaringClass.getClassPool()); - } - - /** - * Obtains the type of the returned value. - */ - CtClass getReturnType0() throws NotFoundException { - return Descriptor.getReturnType(methodInfo.getDescriptor(), - declaringClass.getClassPool()); - } - - /** - * Returns the method signature (the parameter types - * and the return type). - * The method signature is represented by a character string - * called method descriptor, which is defined in the JVM specification. - * If two methods/constructors have - * the same parameter types - * and the return type, getSignature() returns the - * same string (the return type of constructors is void). - * - *

Note that the returned string is not the type signature - * contained in the SignatureAttirbute. It is - * a descriptor. - * - * @see javassist.bytecode.Descriptor - * @see #getGenericSignature() - */ - public String getSignature() { - return methodInfo.getDescriptor(); - } - - /** - * Returns the generic signature of the method. - * It represents parameter types including type variables. - * - * @see SignatureAttribute#toMethodSignature(String) - * @since 3.17 - */ - public String getGenericSignature() { - SignatureAttribute sa - = (SignatureAttribute)methodInfo.getAttribute(SignatureAttribute.tag); - return sa == null ? null : sa.getSignature(); - } - - /** - * Set the generic signature of the method. - * It represents parameter types including type variables. - * See {@link javassist.CtClass#setGenericSignature(String)} - * for a code sample. - * - * @param sig a new generic signature. - * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() - * @since 3.17 - */ - public void setGenericSignature(String sig) { - declaringClass.checkModify(); - methodInfo.addAttribute(new SignatureAttribute(methodInfo.getConstPool(), sig)); - } - - /** - * Obtains exceptions that this method/constructor may throw. - * - * @return a zero-length array if there is no throws clause. - */ - public CtClass[] getExceptionTypes() throws NotFoundException { - String[] exceptions; - ExceptionsAttribute ea = methodInfo.getExceptionsAttribute(); - if (ea == null) - exceptions = null; - else - exceptions = ea.getExceptions(); - - return declaringClass.getClassPool().get(exceptions); - } - - /** - * Sets exceptions that this method/constructor may throw. - */ - public void setExceptionTypes(CtClass[] types) throws NotFoundException { - declaringClass.checkModify(); - if (types == null || types.length == 0) { - methodInfo.removeExceptionsAttribute(); - return; - } - - String[] names = new String[types.length]; - for (int i = 0; i < types.length; ++i) - names[i] = types[i].getName(); - - ExceptionsAttribute ea = methodInfo.getExceptionsAttribute(); - if (ea == null) { - ea = new ExceptionsAttribute(methodInfo.getConstPool()); - methodInfo.setExceptionsAttribute(ea); - } - - ea.setExceptions(names); - } - - /** - * Returns true if the body is empty. - */ - public abstract boolean isEmpty(); - - /** - * Sets a method/constructor body. - * - * @param src the source code representing the body. - * It must be a single statement or block. - * If it is null, the substituted - * body does nothing except returning zero or null. - */ - public void setBody(String src) throws CannotCompileException { - setBody(src, null, null); - } - - /** - * Sets a method/constructor body. - * - * @param src the source code representing the body. - * It must be a single statement or block. - * If it is null, the substituted - * body does nothing except returning zero or null. - * @param delegateObj the source text specifying the object - * that is called on by $proceed(). - * @param delegateMethod the name of the method - * that is called by $proceed(). - */ - public void setBody(String src, - String delegateObj, String delegateMethod) - throws CannotCompileException - { - CtClass cc = declaringClass; - cc.checkModify(); - try { - Javac jv = new Javac(cc); - if (delegateMethod != null) - jv.recordProceed(delegateObj, delegateMethod); - - Bytecode b = jv.compileBody(this, src); - methodInfo.setCodeAttribute(b.toCodeAttribute()); - methodInfo.setAccessFlags(methodInfo.getAccessFlags() - & ~AccessFlag.ABSTRACT); - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - declaringClass.rebuildClassFile(); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - static void setBody0(CtClass srcClass, MethodInfo srcInfo, - CtClass destClass, MethodInfo destInfo, - ClassMap map) - throws CannotCompileException - { - destClass.checkModify(); - - map = new ClassMap(map); - map.put(srcClass.getName(), destClass.getName()); - try { - CodeAttribute cattr = srcInfo.getCodeAttribute(); - if (cattr != null) { - ConstPool cp = destInfo.getConstPool(); - CodeAttribute ca = (CodeAttribute)cattr.copy(cp, map); - destInfo.setCodeAttribute(ca); - // a stack map table is copied to destInfo. - } - } - catch (CodeAttribute.RuntimeCopyException e) { - /* the exception may be thrown by copy() in CodeAttribute. - */ - throw new CannotCompileException(e); - } - - destInfo.setAccessFlags(destInfo.getAccessFlags() - & ~AccessFlag.ABSTRACT); - destClass.rebuildClassFile(); - } - - /** - * Obtains an attribute with the given name. - * If that attribute is not found in the class file, this - * method returns null. - * - *

Note that an attribute is a data block specified by - * the class file format. It is not an annotation. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - */ - public byte[] getAttribute(String name) { - AttributeInfo ai = methodInfo.getAttribute(name); - if (ai == null) - return null; - else - return ai.get(); - } - - /** - * Adds an attribute. The attribute is saved in the class file. - * - *

Note that an attribute is a data block specified by - * the class file format. It is not an annotation. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - * @param data attribute value - */ - public void setAttribute(String name, byte[] data) { - declaringClass.checkModify(); - methodInfo.addAttribute(new AttributeInfo(methodInfo.getConstPool(), - name, data)); - } - - /** - * Declares to use $cflow for this method/constructor. - * If $cflow is used, the class files modified - * with Javassist requires a support class - * javassist.runtime.Cflow at runtime - * (other Javassist classes are not required at runtime). - * - *

Every $cflow variable is given a unique name. - * For example, if the given name is "Point.paint", - * then the variable is indicated by $cflow(Point.paint). - * - * @param name $cflow name. It can include - * alphabets, numbers, _, - * $, and . (dot). - * - * @see javassist.runtime.Cflow - */ - public void useCflow(String name) throws CannotCompileException { - CtClass cc = declaringClass; - cc.checkModify(); - ClassPool pool = cc.getClassPool(); - String fname; - int i = 0; - while (true) { - fname = "_cflow$" + i++; - try { - cc.getDeclaredField(fname); - } - catch(NotFoundException e) { - break; - } - } - - pool.recordCflow(name, declaringClass.getName(), fname); - try { - CtClass type = pool.get("javassist.runtime.Cflow"); - CtField field = new CtField(type, fname, cc); - field.setModifiers(Modifier.PUBLIC | Modifier.STATIC); - cc.addField(field, CtField.Initializer.byNew(type)); - insertBefore(fname + ".enter();", false); - String src = fname + ".exit();"; - insertAfter(src, true); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - /** - * Declares a new local variable. The scope of this variable is the - * whole method body. The initial value of that variable is not set. - * The declared variable can be accessed in the code snippet inserted - * by insertBefore(), insertAfter(), etc. - * - *

If the second parameter asFinally to - * insertAfter() is true, the declared local variable - * is not visible from the code inserted by insertAfter(). - * - * @param name the name of the variable - * @param type the type of the variable - * @see #insertBefore(String) - * @see #insertAfter(String) - */ - public void addLocalVariable(String name, CtClass type) - throws CannotCompileException - { - declaringClass.checkModify(); - ConstPool cp = methodInfo.getConstPool(); - CodeAttribute ca = methodInfo.getCodeAttribute(); - if (ca == null) - throw new CannotCompileException("no method body"); - - LocalVariableAttribute va = (LocalVariableAttribute)ca.getAttribute( - LocalVariableAttribute.tag); - if (va == null) { - va = new LocalVariableAttribute(cp); - ca.getAttributes().add(va); - } - - int maxLocals = ca.getMaxLocals(); - String desc = Descriptor.of(type); - va.addEntry(0, ca.getCodeLength(), - cp.addUtf8Info(name), cp.addUtf8Info(desc), maxLocals); - ca.setMaxLocals(maxLocals + Descriptor.dataSize(desc)); - } - - /** - * Inserts a new parameter, which becomes the first parameter. - */ - public void insertParameter(CtClass type) - throws CannotCompileException - { - declaringClass.checkModify(); - String desc = methodInfo.getDescriptor(); - String desc2 = Descriptor.insertParameter(type, desc); - try { - addParameter2(Modifier.isStatic(getModifiers()) ? 0 : 1, type, desc); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - - methodInfo.setDescriptor(desc2); - } - - /** - * Appends a new parameter, which becomes the last parameter. - */ - public void addParameter(CtClass type) - throws CannotCompileException - { - declaringClass.checkModify(); - String desc = methodInfo.getDescriptor(); - String desc2 = Descriptor.appendParameter(type, desc); - int offset = Modifier.isStatic(getModifiers()) ? 0 : 1; - try { - addParameter2(offset + Descriptor.paramSize(desc), type, desc); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - - methodInfo.setDescriptor(desc2); - } - - private void addParameter2(int where, CtClass type, String desc) - throws BadBytecode - { - CodeAttribute ca = methodInfo.getCodeAttribute(); - if (ca != null) { - int size = 1; - char typeDesc = 'L'; - int classInfo = 0; - if (type.isPrimitive()) { - CtPrimitiveType cpt = (CtPrimitiveType)type; - size = cpt.getDataSize(); - typeDesc = cpt.getDescriptor(); - } - else - classInfo = methodInfo.getConstPool().addClassInfo(type); - - ca.insertLocalVar(where, size); - LocalVariableAttribute va - = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.tag); - if (va != null) - va.shiftIndex(where, size); - - LocalVariableTypeAttribute lvta - = (LocalVariableTypeAttribute)ca.getAttribute(LocalVariableTypeAttribute.tag); - if (lvta != null) - lvta.shiftIndex(where, size); - - StackMapTable smt = (StackMapTable)ca.getAttribute(StackMapTable.tag); - if (smt != null) - smt.insertLocal(where, StackMapTable.typeTagOf(typeDesc), classInfo); - - StackMap sm = (StackMap)ca.getAttribute(StackMap.tag); - if (sm != null) - sm.insertLocal(where, StackMapTable.typeTagOf(typeDesc), classInfo); - } - } - - /** - * Modifies the method/constructor body. - * - * @param converter specifies how to modify. - */ - public void instrument(CodeConverter converter) - throws CannotCompileException - { - declaringClass.checkModify(); - ConstPool cp = methodInfo.getConstPool(); - converter.doit(getDeclaringClass(), methodInfo, cp); - } - - /** - * Modifies the method/constructor body. - * - *

While executing this method, only replace() - * in Expr is available for bytecode modification. - * Other methods such as insertBefore() may collapse - * the bytecode because the ExprEditor loses - * its current position. - * - * @param editor specifies how to modify. - * @see javassist.expr.Expr#replace(String) - * @see #insertBefore(String) - */ - public void instrument(ExprEditor editor) - throws CannotCompileException - { - // if the class is not frozen, - // does not turn the modified flag on. - if (declaringClass.isFrozen()) - declaringClass.checkModify(); - - if (editor.doit(declaringClass, methodInfo)) - declaringClass.checkModify(); - } - - /** - * Inserts bytecode at the beginning of the body. - * - *

If this object represents a constructor, - * the bytecode is inserted before - * a constructor in the super class or this class is called. - * Therefore, the inserted bytecode is subject to constraints described - * in Section 4.8.2 of The Java Virtual Machine Specification (2nd ed). - * For example, it cannot access instance fields or methods although - * it may assign a value to an instance field directly declared in this - * class. Accessing static fields and methods is allowed. - * Use insertBeforeBody() in CtConstructor. - * - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - * @see CtConstructor#insertBeforeBody(String) - */ - public void insertBefore(String src) throws CannotCompileException { - insertBefore(src, true); - } - - private void insertBefore(String src, boolean rebuild) - throws CannotCompileException - { - CtClass cc = declaringClass; - cc.checkModify(); - CodeAttribute ca = methodInfo.getCodeAttribute(); - if (ca == null) - throw new CannotCompileException("no method body"); - - CodeIterator iterator = ca.iterator(); - Javac jv = new Javac(cc); - try { - int nvars = jv.recordParams(getParameterTypes(), - Modifier.isStatic(getModifiers())); - jv.recordParamNames(ca, nvars); - jv.recordLocalVariables(ca, 0); - jv.recordType(getReturnType0()); - jv.compileStmnt(src); - Bytecode b = jv.getBytecode(); - int stack = b.getMaxStack(); - int locals = b.getMaxLocals(); - - if (stack > ca.getMaxStack()) - ca.setMaxStack(stack); - - if (locals > ca.getMaxLocals()) - ca.setMaxLocals(locals); - - int pos = iterator.insertEx(b.get()); - iterator.insert(b.getExceptionTable(), pos); - if (rebuild) - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - /** - * Inserts bytecode at the end of the body. - * The bytecode is inserted just before every return insturction. - * It is not executed when an exception is thrown. - * - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - */ - public void insertAfter(String src) - throws CannotCompileException - { - insertAfter(src, false); - } - - /** - * Inserts bytecode at the end of the body. - * The bytecode is inserted just before every return insturction. - * - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - * @param asFinally true if the inserted bytecode is executed - * not only when the control normally returns - * but also when an exception is thrown. - * If this parameter is true, the inserted code cannot - * access local variables. - */ - public void insertAfter(String src, boolean asFinally) - throws CannotCompileException - { - CtClass cc = declaringClass; - cc.checkModify(); - ConstPool pool = methodInfo.getConstPool(); - CodeAttribute ca = methodInfo.getCodeAttribute(); - if (ca == null) - throw new CannotCompileException("no method body"); - - CodeIterator iterator = ca.iterator(); - int retAddr = ca.getMaxLocals(); - Bytecode b = new Bytecode(pool, 0, retAddr + 1); - b.setStackDepth(ca.getMaxStack() + 1); - Javac jv = new Javac(b, cc); - try { - int nvars = jv.recordParams(getParameterTypes(), - Modifier.isStatic(getModifiers())); - jv.recordParamNames(ca, nvars); - CtClass rtype = getReturnType0(); - int varNo = jv.recordReturnType(rtype, true); - jv.recordLocalVariables(ca, 0); - - // finally clause for exceptions - int handlerLen = insertAfterHandler(asFinally, b, rtype, varNo, - jv, src); - int handlerPos = iterator.getCodeLength(); - if (asFinally) - ca.getExceptionTable().add(getStartPosOfBody(ca), handlerPos, handlerPos, 0); - - int adviceLen = 0; - int advicePos = 0; - boolean noReturn = true; - while (iterator.hasNext()) { - int pos = iterator.next(); - if (pos >= handlerPos) - break; - - int c = iterator.byteAt(pos); - if (c == Opcode.ARETURN || c == Opcode.IRETURN - || c == Opcode.FRETURN || c == Opcode.LRETURN - || c == Opcode.DRETURN || c == Opcode.RETURN) { - if (noReturn) { - // finally clause for normal termination - adviceLen = insertAfterAdvice(b, jv, src, pool, rtype, varNo); - handlerPos = iterator.append(b.get()); - iterator.append(b.getExceptionTable(), handlerPos); - advicePos = iterator.getCodeLength() - adviceLen; - handlerLen = advicePos - handlerPos; - noReturn = false; - } - insertGoto(iterator, advicePos, pos); - advicePos = iterator.getCodeLength() - adviceLen; - handlerPos = advicePos - handlerLen; - } - } - - if (noReturn) { - handlerPos = iterator.append(b.get()); - iterator.append(b.getExceptionTable(), handlerPos); - } - - ca.setMaxStack(b.getMaxStack()); - ca.setMaxLocals(b.getMaxLocals()); - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - private int insertAfterAdvice(Bytecode code, Javac jv, String src, - ConstPool cp, CtClass rtype, int varNo) - throws CompileError - { - int pc = code.currentPc(); - if (rtype == CtClass.voidType) { - code.addOpcode(Opcode.ACONST_NULL); - code.addAstore(varNo); - jv.compileStmnt(src); - code.addOpcode(Opcode.RETURN); - if (code.getMaxLocals() < 1) - code.setMaxLocals(1); - } - else { - code.addStore(varNo, rtype); - jv.compileStmnt(src); - code.addLoad(varNo, rtype); - if (rtype.isPrimitive()) - code.addOpcode(((CtPrimitiveType)rtype).getReturnOp()); - else - code.addOpcode(Opcode.ARETURN); - } - - return code.currentPc() - pc; - } - - /* - * assert subr > pos - */ - private void insertGoto(CodeIterator iterator, int subr, int pos) - throws BadBytecode - { - iterator.setMark(subr); - // the gap length might be a multiple of 4. - iterator.writeByte(Opcode.NOP, pos); - boolean wide = subr + 2 - pos > Short.MAX_VALUE; - int len = wide ? 4 : 2; - CodeIterator.Gap gap = iterator.insertGapAt(pos, len, false); - pos = gap.position + gap.length - len; - int offset = iterator.getMark() - pos; - if (wide) { - iterator.writeByte(Opcode.GOTO_W, pos); - iterator.write32bit(offset, pos + 1); - } - else if (offset <= Short.MAX_VALUE) { - iterator.writeByte(Opcode.GOTO, pos); - iterator.write16bit(offset, pos + 1); - } - else { - if (gap.length < 4) { - CodeIterator.Gap gap2 = iterator.insertGapAt(gap.position, 2, false); - pos = gap2.position + gap2.length + gap.length - 4; - } - - iterator.writeByte(Opcode.GOTO_W, pos); - iterator.write32bit(iterator.getMark() - pos, pos + 1); - } - } - - /* insert a finally clause - */ - private int insertAfterHandler(boolean asFinally, Bytecode b, - CtClass rtype, int returnVarNo, - Javac javac, String src) - throws CompileError - { - if (!asFinally) - return 0; - - int var = b.getMaxLocals(); - b.incMaxLocals(1); - int pc = b.currentPc(); - b.addAstore(var); // store an exception - if (rtype.isPrimitive()) { - char c = ((CtPrimitiveType)rtype).getDescriptor(); - if (c == 'D') { - b.addDconst(0.0); - b.addDstore(returnVarNo); - } - else if (c == 'F') { - b.addFconst(0); - b.addFstore(returnVarNo); - } - else if (c == 'J') { - b.addLconst(0); - b.addLstore(returnVarNo); - } - else if (c == 'V') { - b.addOpcode(Opcode.ACONST_NULL); - b.addAstore(returnVarNo); - } - else { // int, boolean, char, short, ... - b.addIconst(0); - b.addIstore(returnVarNo); - } - } - else { - b.addOpcode(Opcode.ACONST_NULL); - b.addAstore(returnVarNo); - } - - javac.compileStmnt(src); - b.addAload(var); - b.addOpcode(Opcode.ATHROW); - return b.currentPc() - pc; - } - - /* -- OLD version -- - - public void insertAfter(String src) throws CannotCompileException { - declaringClass.checkModify(); - CodeAttribute ca = methodInfo.getCodeAttribute(); - CodeIterator iterator = ca.iterator(); - Bytecode b = new Bytecode(methodInfo.getConstPool(), - ca.getMaxStack(), ca.getMaxLocals()); - b.setStackDepth(ca.getMaxStack()); - Javac jv = new Javac(b, declaringClass); - try { - jv.recordParams(getParameterTypes(), - Modifier.isStatic(getModifiers())); - CtClass rtype = getReturnType0(); - int varNo = jv.recordReturnType(rtype, true); - boolean isVoid = rtype == CtClass.voidType; - if (isVoid) { - b.addOpcode(Opcode.ACONST_NULL); - b.addAstore(varNo); - jv.compileStmnt(src); - } - else { - b.addStore(varNo, rtype); - jv.compileStmnt(src); - b.addLoad(varNo, rtype); - } - - byte[] code = b.get(); - ca.setMaxStack(b.getMaxStack()); - ca.setMaxLocals(b.getMaxLocals()); - while (iterator.hasNext()) { - int pos = iterator.next(); - int c = iterator.byteAt(pos); - if (c == Opcode.ARETURN || c == Opcode.IRETURN - || c == Opcode.FRETURN || c == Opcode.LRETURN - || c == Opcode.DRETURN || c == Opcode.RETURN) - iterator.insert(pos, code); - } - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - */ - - /** - * Adds a catch clause that handles an exception thrown in the - * body. The catch clause must end with a return or throw statement. - * - * @param src the source code representing the catch clause. - * It must be a single statement or block. - * @param exceptionType the type of the exception handled by the - * catch clause. - */ - public void addCatch(String src, CtClass exceptionType) - throws CannotCompileException - { - addCatch(src, exceptionType, "$e"); - } - - /** - * Adds a catch clause that handles an exception thrown in the - * body. The catch clause must end with a return or throw statement. - * - * @param src the source code representing the catch clause. - * It must be a single statement or block. - * @param exceptionType the type of the exception handled by the - * catch clause. - * @param exceptionName the name of the variable containing the - * caught exception, for example, - * $e. - */ - public void addCatch(String src, CtClass exceptionType, - String exceptionName) - throws CannotCompileException - { - CtClass cc = declaringClass; - cc.checkModify(); - ConstPool cp = methodInfo.getConstPool(); - CodeAttribute ca = methodInfo.getCodeAttribute(); - CodeIterator iterator = ca.iterator(); - Bytecode b = new Bytecode(cp, ca.getMaxStack(), ca.getMaxLocals()); - b.setStackDepth(1); - Javac jv = new Javac(b, cc); - try { - jv.recordParams(getParameterTypes(), - Modifier.isStatic(getModifiers())); - int var = jv.recordVariable(exceptionType, exceptionName); - b.addAstore(var); - jv.compileStmnt(src); - - int stack = b.getMaxStack(); - int locals = b.getMaxLocals(); - - if (stack > ca.getMaxStack()) - ca.setMaxStack(stack); - - if (locals > ca.getMaxLocals()) - ca.setMaxLocals(locals); - - int len = iterator.getCodeLength(); - int pos = iterator.append(b.get()); - ca.getExceptionTable().add(getStartPosOfBody(ca), len, len, - cp.addClassInfo(exceptionType)); - iterator.append(b.getExceptionTable(), pos); - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - /* CtConstructor overrides this method. - */ - int getStartPosOfBody(CodeAttribute ca) throws CannotCompileException { - return 0; - } - - /** - * Inserts bytecode at the specified line in the body. - * It is equivalent to: - * - *
insertAt(lineNum, true, src) - * - *
See this method as well. - * - * @param lineNum the line number. The bytecode is inserted at the - * beginning of the code at the line specified by this - * line number. - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - * @return the line number at which the bytecode has been inserted. - * - * @see CtBehavior#insertAt(int,boolean,String) - */ - public int insertAt(int lineNum, String src) - throws CannotCompileException - { - return insertAt(lineNum, true, src); - } - - /** - * Inserts bytecode at the specified line in the body. - * - *

If there is not - * a statement at the specified line, the bytecode might be inserted - * at the line including the first statement after that line specified. - * For example, if there is only a closing brace at that line, the - * bytecode would be inserted at another line below. - * To know exactly where the bytecode will be inserted, call with - * modify set to false. - * - * @param lineNum the line number. The bytecode is inserted at the - * beginning of the code at the line specified by this - * line number. - * @param modify if false, this method does not insert the bytecode. - * It instead only returns the line number at which - * the bytecode would be inserted. - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - * If modify is false, the value of src can be null. - * @return the line number at which the bytecode has been inserted. - */ - public int insertAt(int lineNum, boolean modify, String src) - throws CannotCompileException - { - CodeAttribute ca = methodInfo.getCodeAttribute(); - if (ca == null) - throw new CannotCompileException("no method body"); - - LineNumberAttribute ainfo - = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); - if (ainfo == null) - throw new CannotCompileException("no line number info"); - - LineNumberAttribute.Pc pc = ainfo.toNearPc(lineNum); - lineNum = pc.line; - int index = pc.index; - if (!modify) - return lineNum; - - CtClass cc = declaringClass; - cc.checkModify(); - CodeIterator iterator = ca.iterator(); - Javac jv = new Javac(cc); - try { - jv.recordLocalVariables(ca, index); - jv.recordParams(getParameterTypes(), - Modifier.isStatic(getModifiers())); - jv.setMaxLocals(ca.getMaxLocals()); - jv.compileStmnt(src); - Bytecode b = jv.getBytecode(); - int locals = b.getMaxLocals(); - int stack = b.getMaxStack(); - ca.setMaxLocals(locals); - - /* We assume that there is no values in the operand stack - * at the position where the bytecode is inserted. - */ - if (stack > ca.getMaxStack()) - ca.setMaxStack(stack); - - index = iterator.insertAt(index, b.get()); - iterator.insert(b.getExceptionTable(), index); - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - return lineNum; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtClass.java b/src/com/wenshuo/agent/javassist/CtClass.java deleted file mode 100644 index 21fe5ac..0000000 --- a/src/com/wenshuo/agent/javassist/CtClass.java +++ /dev/null @@ -1,1595 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.BufferedOutputStream; -import java.io.ByteArrayOutputStream; -import java.io.DataOutputStream; -import java.io.File; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.OutputStream; -import java.net.URL; -import java.security.ProtectionDomain; -import java.util.Collection; - -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.Opcode; -import com.wenshuo.agent.javassist.expr.ExprEditor; - -/* Note: - * - * This class is an abstract class and several methods just return null - * or throw an exception. Those methods are overridden in subclasses - * of this class. Read the source code of CtClassType if you are - * interested in the implementation of Javassist. - * - * Subclasses of CtClass are CtClassType, CtPrimitiveType, and CtArray. - */ - -/** - * An instance of CtClass represents a class. - * It is obtained from ClassPool. - * - * @see ClassPool#get(String) - */ -public abstract class CtClass { - protected String qualifiedName; - - /** - * If the value of this field is not null, then all class - * files modified by Javassist are saved under the directory - * specified by this variable. For example, if the value is - * "./debug", then all class files are saved - * there. The directory name must not end with a directory - * separator such as /. - * - *

The default value is null. - * - * @see #debugWriteFile(String) - * @since 3.16 - */ - public static String debugDump = null; - - /** - * The version number of this release. - */ - public static final String version = "3.20.0-GA"; - - /** - * Prints the version number and the copyright notice. - * - *

The following command invokes this method: - * - * 

java -jar javassist.jar
- */ - public static void main(String[] args) { - System.out.println("Javassist version " + CtClass.version); - System.out.println("Copyright (C) 1999-2015 Shigeru Chiba." - + " All Rights Reserved."); - } - - static final String javaLangObject = "java.lang.Object"; - - /** - * The CtClass object representing - * the boolean type. - */ - public static CtClass booleanType; - - /** - * The CtClass object representing - * the char type. - */ - public static CtClass charType; - - /** - * The CtClass object representing - * the byte type. - */ - public static CtClass byteType; - - /** - * The CtClass object representing - * the short type. - */ - public static CtClass shortType; - - /** - * The CtClass object representing - * the int type. - */ - public static CtClass intType; - - /** - * The CtClass object representing - * the long type. - */ - public static CtClass longType; - - /** - * The CtClass object representing - * the float type. - */ - public static CtClass floatType; - - /** - * The CtClass object representing - * the double type. - */ - public static CtClass doubleType; - - /** - * The CtClass object representing - * the void type. - */ - public static CtClass voidType; - - static CtClass[] primitiveTypes; - - static { - primitiveTypes = new CtClass[9]; - - booleanType = - new CtPrimitiveType("boolean", 'Z', "java.lang.Boolean", - "booleanValue", "()Z", Opcode.IRETURN, - Opcode.T_BOOLEAN, 1); - primitiveTypes[0] = booleanType; - - charType = new CtPrimitiveType("char", 'C', "java.lang.Character", - "charValue", "()C", Opcode.IRETURN, - Opcode.T_CHAR, 1); - primitiveTypes[1] = charType; - - byteType = new CtPrimitiveType("byte", 'B', "java.lang.Byte", - "byteValue", "()B", Opcode.IRETURN, - Opcode.T_BYTE, 1); - primitiveTypes[2] = byteType; - - shortType = new CtPrimitiveType("short", 'S', "java.lang.Short", - "shortValue", "()S", Opcode.IRETURN, - Opcode.T_SHORT, 1); - primitiveTypes[3] = shortType; - - intType = new CtPrimitiveType("int", 'I', "java.lang.Integer", - "intValue", "()I", Opcode.IRETURN, - Opcode.T_INT, 1); - primitiveTypes[4] = intType; - - longType = new CtPrimitiveType("long", 'J', "java.lang.Long", - "longValue", "()J", Opcode.LRETURN, - Opcode.T_LONG, 2); - primitiveTypes[5] = longType; - - floatType = new CtPrimitiveType("float", 'F', "java.lang.Float", - "floatValue", "()F", Opcode.FRETURN, - Opcode.T_FLOAT, 1); - primitiveTypes[6] = floatType; - - doubleType = new CtPrimitiveType("double", 'D', "java.lang.Double", - "doubleValue", "()D", Opcode.DRETURN, - Opcode.T_DOUBLE, 2); - primitiveTypes[7] = doubleType; - - voidType = new CtPrimitiveType("void", 'V', "java.lang.Void", - null, null, Opcode.RETURN, 0, 0); - primitiveTypes[8] = voidType; - } - - protected CtClass(String name) { - qualifiedName = name; - } - - /** - * Converts the object to a string. - */ - public String toString() { - StringBuffer buf = new StringBuffer(getClass().getName()); - buf.append("@"); - buf.append(Integer.toHexString(hashCode())); - buf.append("["); - extendToString(buf); - buf.append("]"); - return buf.toString(); - } - - /** - * Implemented in subclasses to add to the {@link #toString()} result. - * Subclasses should put a space before each token added to the buffer. - */ - protected void extendToString(StringBuffer buffer) { - buffer.append(getName()); - } - - /** - * Returns a ClassPool for this class. - */ - public ClassPool getClassPool() { return null; } - - /** - * Returns a class file for this class. - * - *

This method is not available if isFrozen() - * is true. - */ - public ClassFile getClassFile() { - checkModify(); - return getClassFile2(); - } - - /** - * Returns a class file for this class (read only). - * Normal applications do not need calling this method. Use - * getClassFile(). - * - *

The ClassFile object obtained by this method - * is read only. Changes to this object might not be reflected - * on a class file generated by toBytecode(), - * toClass(), etc. - * - *

This method is available even if isFrozen() - * is true. However, if the class is frozen, it might be also - * pruned. - * - * @see CtClass#getClassFile() - * @see CtClass#isFrozen() - * @see CtClass#prune() - */ - public ClassFile getClassFile2() { return null; } - - /** - * Undocumented method. Do not use; internal-use only. - */ - public com.wenshuo.agent.javassist.compiler.AccessorMaker getAccessorMaker() { - return null; - } - - /** - * Returns the uniform resource locator (URL) of the class file. - */ - public URL getURL() throws NotFoundException { - throw new NotFoundException(getName()); - } - - /** - * Returns true if the definition of the class has been modified. - */ - public boolean isModified() { return false; } - - /** - * Returns true if the class has been loaded or written out - * and thus it cannot be modified any more. - * - * @see #defrost() - * @see #detach() - */ - public boolean isFrozen() { return true; } - - /** - * Makes the class frozen. - * - * @see #isFrozen() - * @see #defrost() - * @since 3.6 - */ - public void freeze() {} - - /* Note: this method is overridden by CtClassType - */ - void checkModify() throws RuntimeException { - if (isFrozen()) - throw new RuntimeException(getName() + " class is frozen"); - - // isModified() must return true after this method is invoked. - } - - /** - * Defrosts the class so that the class can be modified again. - * - *

To avoid changes that will be never reflected, - * the class is frozen to be unmodifiable if it is loaded or - * written out. This method should be called only in a case - * that the class will be reloaded or written out later again. - * - *

If defrost() will be called later, pruning - * must be disallowed in advance. - * - * @see #isFrozen() - * @see #stopPruning(boolean) - * @see #detach() - */ - public void defrost() { - throw new RuntimeException("cannot defrost " + getName()); - } - - /** - * Returns true if this object represents a primitive - * Java type: boolean, byte, char, short, int, long, float, double, - * or void. - */ - public boolean isPrimitive() { return false; } - - /** - * Returns true if this object represents an array type. - */ - public boolean isArray() { - return false; - } - - /** - * If this object represents an array, this method returns the component - * type of the array. Otherwise, it returns null. - */ - public CtClass getComponentType() throws NotFoundException { - return null; - } - - /** - * Returns true if this class extends or implements - * clazz. It also returns true if - * this class is the same as clazz. - */ - public boolean subtypeOf(CtClass clazz) throws NotFoundException { - return this == clazz || getName().equals(clazz.getName()); - } - - /** - * Obtains the fully-qualified name of the class. - */ - public String getName() { return qualifiedName; } - - /** - * Obtains the not-qualified class name. - */ - public final String getSimpleName() { - String qname = qualifiedName; - int index = qname.lastIndexOf('.'); - if (index < 0) - return qname; - else - return qname.substring(index + 1); - } - - /** - * Obtains the package name. It may be null. - */ - public final String getPackageName() { - String qname = qualifiedName; - int index = qname.lastIndexOf('.'); - if (index < 0) - return null; - else - return qname.substring(0, index); - } - - /** - * Sets the class name - * - * @param name fully-qualified name - */ - public void setName(String name) { - checkModify(); - if (name != null) - qualifiedName = name; - } - - /** - * Returns the generic signature of the class. - * - *

The generics of Java is implemented by the erasure technique. - * After compilation, all type parameters are dropped off from the - * main part of a class file. However, for reflection, the type - * parameters are encoded into generic signatures and attached - * to a class file. - * - * @return null if the generic signature is not included. - * @see javassist.bytecode.SignatureAttribute#toClassSignature(String) - * @see CtMember#getGenericSignature() - * @since 3.17 - */ - public String getGenericSignature() { return null; } - - /** - * Sets the generic signature of the class. - * - *

The generics of Java is implemented by the erasure technique. - * After compilation, all type parameters are dropped off from the - * main part of a class file. However, for reflection, the type - * parameters must be encoded into generic signatures and attached - * to a class file. - * - *

For example, - * - * 

class List<T> {
-     *     T value;
-     *     T get() { return value; }
-     *     void set(T v) { value = v; }
-     * }
-     *
- * - *

this class is generated by the following code: - * - * 

-     * ClassPool pool = ClassPool.getDefault();
-     * CtClass cc = pool.makeClass("List");
-     * CtClass objectClass = pool.get(CtClass.javaLangObject);
-     * ClassSignature cs = new ClassSignature(
-     *                         new TypeParameter[] { new TypeParameter("T") });
-     * cc.setGenericSignature(cs.encode());    // <T:Ljava/lang/Object;>Ljava/lang/Object;
-     *
-     * CtField f = new CtField(objClass, "value", cc);
-     * TypeVariable tvar = new TypeVariable("T");
-     * f.setGenericSignature(tvar.encode());   // TT;
-     * cc.addField(f);
-     *
-     * CtMethod m = CtNewMethod.make("public Object get(){return value;}", cc);
-     * MethodSignature ms = new MethodSignature(null, null, tvar, null);
-     * m.setGenericSignature(ms.encode());     // ()TT;
-     * cc.addMethod(m);
-     *
-     * CtMethod m2 = CtNewMethod.make("public void set(Object v){value = v;}", cc);
-     * MethodSignature ms2 = new MethodSignature(null, new Type[] { tvar },
-     *                                           new BaseType("void"), null);
-     * m2.setGenericSignature(ms2.encode());   // (TT;)V;
-     * cc.addMethod(m2);
-     *
-     * cc.writeFile();
-     *
- * - *

The generated class file is equivalent to the following: - * - * 

class List {
-     *     Object value;
-     *     Object get() { return value; }
-     *     void set(Object v) { value = v; }
-     * }
- * - *

but it includes generic signatures for the class, the field, - * and the methods so that the type variable T can be - * accessible through reflection. - * - *

MethodSignature is a utility class. You can directly - * pass the signature string to the setGenericSignature method. - * For the specification of the signatures, see Section 4.7.9.1 Signatures - * of The Java Virtual Machine Specification (Java SE 8). - * - * @param sig a generic signature. - * @see javassist.bytecode.SignatureAttribute.ClassSignature#encode() - * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() - * @see CtMember#setGenericSignature(String) - * @since 3.17 - */ - public void setGenericSignature(String sig) { checkModify(); } - - /** - * Substitutes newName for all occurrences of a class - * name oldName in the class file. - * - * @param oldName replaced class name - * @param newName substituted class name - */ - public void replaceClassName(String oldName, String newName) { - checkModify(); - } - - /** - * Changes class names appearing in the class file according to the - * given map. - * - *

All the class names appearing in the class file are tested - * with map to determine whether each class name is - * replaced or not. Thus this method can be used for collecting - * all the class names in the class file. To do that, first define - * a subclass of ClassMap so that get() - * records all the given parameters. Then, make an instance of - * that subclass as an empty hash-table. Finally, pass that instance - * to this method. After this method finishes, that instance would - * contain all the class names appearing in the class file. - * - * @param map the hashtable associating replaced class names - * with substituted names. - */ - public void replaceClassName(ClassMap map) { - checkModify(); - } - - /** - * Returns a collection of the names of all the classes - * referenced in this class. - * That collection includes the name of this class. - * - *

This method may return null. - * - * @return a Collection<String> object. - */ - public synchronized Collection getRefClasses() { - ClassFile cf = getClassFile2(); - if (cf != null) { - ClassMap cm = new ClassMap() { - public void put(String oldname, String newname) { - put0(oldname, newname); - } - - public Object get(Object jvmClassName) { - String n = toJavaName((String)jvmClassName); - put0(n, n); - return null; - } - - public void fix(String name) {} - }; - cf.getRefClasses(cm); - return cm.values(); - } - else - return null; - } - - /** - * Determines whether this object represents a class or an interface. - * It returns true if this object represents an interface. - */ - public boolean isInterface() { - return false; - } - - /** - * Determines whether this object represents an annotation type. - * It returns true if this object represents an annotation type. - * - * @since 3.2 - */ - public boolean isAnnotation() { - return false; - } - - /** - * Determines whether this object represents an enum. - * It returns true if this object represents an enum. - * - * @since 3.2 - */ - public boolean isEnum() { - return false; - } - - /** - * Returns the modifiers for this class, encoded in an integer. - * For decoding, use javassist.Modifier. - * - *

If the class is a static nested class (a.k.a. static inner class), - * the returned modifiers include Modifier.STATIC. - * - * @see Modifier - */ - public int getModifiers() { - return 0; - } - - /** - * Returns true if the class has the specified annotation class. - * - * @param clz the annotation class. - * @return true if the annotation is found, otherwise false. - * @since 3.11 - */ - public boolean hasAnnotation(Class clz) { - return false; - } - - /** - * Returns the annotation if the class has the specified annotation class. - * For example, if an annotation @Author is associated - * with this class, an Author object is returned. - * The member values can be obtained by calling methods on - * the Author object. - * - * @param clz the annotation class. - * @return the annotation if found, otherwise null. - * @since 3.11 - */ - public Object getAnnotation(Class clz) throws ClassNotFoundException { - return null; - } - - /** - * Returns the annotations associated with this class. - * For example, if an annotation @Author is associated - * with this class, the returned array contains an Author - * object. The member values can be obtained by calling methods on - * the Author object. - * - * @return an array of annotation-type objects. - * @see CtMember#getAnnotations() - * @since 3.1 - */ - public Object[] getAnnotations() throws ClassNotFoundException { - return new Object[0]; - } - - /** - * Returns the annotations associated with this class. - * This method is equivalent to getAnnotations() - * except that, if any annotations are not on the classpath, - * they are not included in the returned array. - * - * @return an array of annotation-type objects. - * @see #getAnnotations() - * @see CtMember#getAvailableAnnotations() - * @since 3.3 - */ - public Object[] getAvailableAnnotations(){ - return new Object[0]; - } - - /** - * Returns an array of nested classes declared in the class. - * Nested classes are inner classes, anonymous classes, local classes, - * and static nested classes. This simply calls getNestedClasses(). - * - * @see #getNestedClasses() - * @since 3.15 - */ - public CtClass[] getDeclaredClasses() throws NotFoundException { - return getNestedClasses(); - } - - /** - * Returns an array of nested classes declared in the class. - * Nested classes are inner classes, anonymous classes, local classes, - * and static nested classes. - * - * @since 3.2 - */ - public CtClass[] getNestedClasses() throws NotFoundException { - return new CtClass[0]; - } - - /** - * Sets the modifiers. - * - *

If the class is a nested class, this method also modifies - * the class declaring that nested class (i.e. the enclosing - * class is modified). - * - * @param mod modifiers encoded by - * javassist.Modifier - * @see Modifier - */ - public void setModifiers(int mod) { - checkModify(); - } - - /** - * Determines whether the class directly or indirectly extends - * the given class. If this class extends a class A and - * the class A extends a class B, then subclassof(B) returns true. - * - *

This method returns true if the given class is identical to - * the class represented by this object. - */ - public boolean subclassOf(CtClass superclass) { - return false; - } - - /** - * Obtains the class object representing the superclass of the - * class. - * It returns null if this object represents the - * java.lang.Object class and thus it does not have - * the super class. - * - *

If this object represents an interface, this method - * always returns the java.lang.Object class. - * To obtain the super interfaces - * extended by that interface, call getInterfaces(). - */ - public CtClass getSuperclass() throws NotFoundException { - return null; - } - - /** - * Changes a super class unless this object represents an interface. - * The new super class must be compatible with the old one; for example, - * it should inherit from the old super class. - * - *

If this object represents an interface, this method is equivalent - * to addInterface(); it appends clazz to - * the list of the super interfaces extended by that interface. - * Note that an interface can extend multiple super interfaces. - * - * @see #replaceClassName(String, String) - * @see #replaceClassName(ClassMap) - */ - public void setSuperclass(CtClass clazz) throws CannotCompileException { - checkModify(); - } - - /** - * Obtains the class objects representing the interfaces implemented - * by the class or, if this object represents an interface, the interfaces - * extended by that interface. - */ - public CtClass[] getInterfaces() throws NotFoundException { - return new CtClass[0]; - } - - /** - * Sets implemented interfaces. If this object represents an interface, - * this method sets the interfaces extended by that interface. - * - * @param list a list of the CtClass objects - * representing interfaces, or - * null if the class implements - * no interfaces. - */ - public void setInterfaces(CtClass[] list) { - checkModify(); - } - - /** - * Adds an interface. - * - * @param anInterface the added interface. - */ - public void addInterface(CtClass anInterface) { - checkModify(); - } - - /** - * If this class is a member class or interface of another class, - * then the class enclosing this class is returned. - * - * @return null if this class is a top-level class or an anonymous class. - */ - public CtClass getDeclaringClass() throws NotFoundException { - return null; - } - - /** - * Returns the immediately enclosing method of this class. - * This method works only with JDK 1.5 or later. - * - * @return null if this class is not a local class or an anonymous - * class. - * @deprecated The enclosing method might be a constructor. - * Use {@link #getEnclosingBehavior()}. - * @see #getEnclosingBehavior() - */ - public final CtMethod getEnclosingMethod() throws NotFoundException { - CtBehavior b = getEnclosingBehavior(); - if (b == null) - return null; - else if (b instanceof CtMethod) - return (CtMethod)b; - else - throw new NotFoundException(b.getLongName() + " is enclosing " + getName()); - } - - /** - * Returns the immediately enclosing method of this class. - * It might be not a method but a constructor. - * This method works only with JDK 1.5 or later. - * - * @return null if this class is not a local class or an anonymous - * class. - */ - public CtBehavior getEnclosingBehavior() throws NotFoundException { - return null; - } - - /** - * Makes a new public nested class. If this method is called, - * the CtClass, which encloses the nested class, is modified - * since a class file includes a list of nested classes. - * - *

The current implementation only supports a static nested class. - * isStatic must be true. - * - * @param name the simple name of the nested class. - * @param isStatic true if the nested class is static. - */ - public CtClass makeNestedClass(String name, boolean isStatic) { - throw new RuntimeException(getName() + " is not a class"); - } - - /** - * Returns an array containing CtField objects - * representing all the non-private fields of the class. - * That array includes non-private fields inherited from the - * superclasses. - */ - public CtField[] getFields() { return new CtField[0]; } - - /** - * Returns the field with the specified name. The returned field - * may be a private field declared in a super class or interface. - */ - public CtField getField(String name) throws NotFoundException { - return getField(name, null); - } - - /** - * Returns the field with the specified name and type. The returned field - * may be a private field declared in a super class or interface. - * Unlike Java, the JVM allows a class to have - * multiple fields with the same name but different types. - * - * @param name the field name. - * @param desc the type descriptor of the field. It is available by - * {@link CtField#getSignature()}. - * @see CtField#getSignature() - */ - public CtField getField(String name, String desc) throws NotFoundException { - throw new NotFoundException(name); - } - - /** - * @return null if the specified field is not found. - */ - CtField getField2(String name, String desc) { return null; } - - /** - * Gets all the fields declared in the class. The inherited fields - * are not included. - * - *

Note: the result does not include inherited fields. - */ - public CtField[] getDeclaredFields() { return new CtField[0]; } - - /** - * Retrieves the field with the specified name among the fields - * declared in the class. - * - *

Note: this method does not search the super classes. - */ - public CtField getDeclaredField(String name) throws NotFoundException { - throw new NotFoundException(name); - } - - /** - * Retrieves the field with the specified name and type among the fields - * declared in the class. Unlike Java, the JVM allows a class to have - * multiple fields with the same name but different types. - * - *

Note: this method does not search the super classes. - * - * @param name the field name. - * @param desc the type descriptor of the field. It is available by - * {@link CtField#getSignature()}. - * @see CtField#getSignature() - */ - public CtField getDeclaredField(String name, String desc) throws NotFoundException { - throw new NotFoundException(name); - } - - /** - * Gets all the constructors and methods declared in the class. - */ - public CtBehavior[] getDeclaredBehaviors() { - return new CtBehavior[0]; - } - - /** - * Returns an array containing CtConstructor objects - * representing all the non-private constructors of the class. - */ - public CtConstructor[] getConstructors() { - return new CtConstructor[0]; - } - - /** - * Returns the constructor with the given signature, - * which is represented by a character string - * called method descriptor. - * For details of the method descriptor, see the JVM specification - * or javassist.bytecode.Descriptor. - * - * @param desc method descriptor - * @see javassist.bytecode.Descriptor - */ - public CtConstructor getConstructor(String desc) - throws NotFoundException - { - throw new NotFoundException("no such constructor"); - } - - /** - * Gets all the constructors declared in the class. - * - * @see javassist.CtConstructor - */ - public CtConstructor[] getDeclaredConstructors() { - return new CtConstructor[0]; - } - - /** - * Returns a constructor receiving the specified parameters. - * - * @param params parameter types. - */ - public CtConstructor getDeclaredConstructor(CtClass[] params) - throws NotFoundException - { - String desc = Descriptor.ofConstructor(params); - return getConstructor(desc); - } - - /** - * Gets the class initializer (static constructor) - * declared in the class. - * This method returns null if - * no class initializer is not declared. - * - * @see #makeClassInitializer() - * @see javassist.CtConstructor - */ - public CtConstructor getClassInitializer() { - return null; - } - - /** - * Returns an array containing CtMethod objects - * representing all the non-private methods of the class. - * That array includes non-private methods inherited from the - * superclasses. - */ - public CtMethod[] getMethods() { - return new CtMethod[0]; - } - - /** - * Returns the method with the given name and signature. - * The returned method may be declared in a super class. - * The method signature is represented by a character string - * called method descriptor, - * which is defined in the JVM specification. - * - * @param name method name - * @param desc method descriptor - * @see CtBehavior#getSignature() - * @see javassist.bytecode.Descriptor - */ - public CtMethod getMethod(String name, String desc) - throws NotFoundException - { - throw new NotFoundException(name); - } - - /** - * Gets all methods declared in the class. The inherited methods - * are not included. - * - * @see javassist.CtMethod - */ - public CtMethod[] getDeclaredMethods() { - return new CtMethod[0]; - } - - /** - * Retrieves the method with the specified name and parameter types - * among the methods declared in the class. - * - *

Note: this method does not search the superclasses. - * - * @param name method name - * @param params parameter types - * @see javassist.CtMethod - */ - public CtMethod getDeclaredMethod(String name, CtClass[] params) - throws NotFoundException - { - throw new NotFoundException(name); - } - - /** - * Retrieves methods with the specified name among the methods - * declared in the class. Multiple methods with different parameters - * may be returned. - * - *

Note: this method does not search the superclasses.

- * - * @param name method name. - * @since 3.19 - */ - public CtMethod[] getDeclaredMethods(String name) throws NotFoundException { - throw new NotFoundException(name); - } - - /** - * Retrieves the method with the specified name among the methods - * declared in the class. If there are multiple methods with - * the specified name, then this method returns one of them. - * - *

Note: this method does not search the superclasses. - * - * @see javassist.CtMethod - */ - public CtMethod getDeclaredMethod(String name) throws NotFoundException { - throw new NotFoundException(name); - } - - /** - * Makes an empty class initializer (static constructor). - * If the class already includes a class initializer, - * this method returns it. - * - * @see #getClassInitializer() - */ - public CtConstructor makeClassInitializer() - throws CannotCompileException - { - throw new CannotCompileException("not a class"); - } - - /** - * Adds a constructor. To add a class initializer (static constructor), - * call makeClassInitializer(). - * - * @see #makeClassInitializer() - */ - public void addConstructor(CtConstructor c) - throws CannotCompileException - { - checkModify(); - } - - /** - * Removes a constructor declared in this class. - * - * @param c removed constructor. - * @throws NotFoundException if the constructor is not found. - */ - public void removeConstructor(CtConstructor c) throws NotFoundException { - checkModify(); - } - - /** - * Adds a method. - */ - public void addMethod(CtMethod m) throws CannotCompileException { - checkModify(); - } - - /** - * Removes a method declared in this class. - * - * @param m removed method. - * @throws NotFoundException if the method is not found. - */ - public void removeMethod(CtMethod m) throws NotFoundException { - checkModify(); - } - - /** - * Adds a field. - * - *

The CtField belonging to another - * CtClass cannot be directly added to this class. - * Only a field created for this class can be added. - * - * @see javassist.CtField#CtField(CtField,CtClass) - */ - public void addField(CtField f) throws CannotCompileException { - addField(f, (CtField.Initializer)null); - } - - /** - * Adds a field with an initial value. - * - *

The CtField belonging to another - * CtClass cannot be directly added to this class. - * Only a field created for this class can be added. - * - *

The initial value is given as an expression written in Java. - * Any regular Java expression can be used for specifying the initial - * value. The followings are examples. - * - * 

-     * cc.addField(f, "0")               // the initial value is 0.
-     * cc.addField(f, "i + 1")           // i + 1.
-     * cc.addField(f, "new Point()");    // a Point object.
-     *
- * - *

Here, the type of variable cc is CtClass. - * The type of f is CtField. - * - *

Note: do not change the modifier of the field - * (in particular, do not add or remove static - * to/from the modifier) - * after it is added to the class by addField(). - * - * @param init an expression for the initial value. - * - * @see javassist.CtField.Initializer#byExpr(String) - * @see javassist.CtField#CtField(CtField,CtClass) - */ - public void addField(CtField f, String init) - throws CannotCompileException - { - checkModify(); - } - - /** - * Adds a field with an initial value. - * - *

The CtField belonging to another - * CtClass cannot be directly added to this class. - * Only a field created for this class can be added. - * - *

For example, - * - * 

-     * CtClass cc = ...;
-     * addField(new CtField(CtClass.intType, "i", cc),
-     *          CtField.Initializer.constant(1));
-     *
- * - *

This code adds an int field named "i". The - * initial value of this field is 1. - * - * @param init specifies the initial value of the field. - * - * @see javassist.CtField#CtField(CtField,CtClass) - */ - public void addField(CtField f, CtField.Initializer init) - throws CannotCompileException - { - checkModify(); - } - - /** - * Removes a field declared in this class. - * - * @param f removed field. - * @throws NotFoundException if the field is not found. - */ - public void removeField(CtField f) throws NotFoundException { - checkModify(); - } - - /** - * Obtains an attribute with the given name. - * If that attribute is not found in the class file, this - * method returns null. - * - *

This is a convenient method mainly for obtaining - * a user-defined attribute. For dealing with attributes, see the - * javassist.bytecode package. For example, the following - * expression returns all the attributes of a class file. - * - * 

-     * getClassFile().getAttributes()
-     *
- * - * @param name attribute name - * @see javassist.bytecode.AttributeInfo - */ - public byte[] getAttribute(String name) { - return null; - } - - /** - * Adds a named attribute. - * An arbitrary data (smaller than 64Kb) can be saved in the class - * file. Some attribute name are reserved by the JVM. - * The attributes with the non-reserved names are ignored when a - * class file is loaded into the JVM. - * If there is already an attribute with - * the same name, this method substitutes the new one for it. - * - *

This is a convenient method mainly for adding - * a user-defined attribute. For dealing with attributes, see the - * javassist.bytecode package. For example, the following - * expression adds an attribute info to a class file. - * - * 

-     * getClassFile().addAttribute(info)
-     *
- * - * @param name attribute name - * @param data attribute value - * @see javassist.bytecode.AttributeInfo - */ - public void setAttribute(String name, byte[] data) { - checkModify(); - } - - /** - * Applies the given converter to all methods and constructors - * declared in the class. This method calls instrument() - * on every CtMethod and CtConstructor object - * in the class. - * - * @param converter specifies how to modify. - */ - public void instrument(CodeConverter converter) - throws CannotCompileException - { - checkModify(); - } - - /** - * Modifies the bodies of all methods and constructors - * declared in the class. This method calls instrument() - * on every CtMethod and CtConstructor object - * in the class. - * - * @param editor specifies how to modify. - */ - public void instrument(ExprEditor editor) - throws CannotCompileException - { - checkModify(); - } - - /** - * Converts this class to a java.lang.Class object. - * Once this method is called, further modifications are not - * allowed any more. - * To load the class, this method uses the context class loader - * of the current thread. If the program is running on some application - * server, the context class loader might be inappropriate to load the - * class. - * - *

This method is provided for convenience. If you need more - * complex functionality, you should write your own class loader. - * - *

Note: this method calls toClass() - * in ClassPool. - * - *

Warining: A Class object returned by this method may not - * work with a security manager or a signed jar file because a - * protection domain is not specified. - * - * @see #toClass(java.lang.ClassLoader,ProtectionDomain) - * @see ClassPool#toClass(CtClass) - */ - public Class toClass() throws CannotCompileException { - return getClassPool().toClass(this); - } - - /** - * Converts this class to a java.lang.Class object. - * Once this method is called, further modifications are not allowed - * any more. - * - *

The class file represented by this CtClass is - * loaded by the given class loader to construct a - * java.lang.Class object. Since a private method - * on the class loader is invoked through the reflection API, - * the caller must have permissions to do that. - * - *

An easy way to obtain ProtectionDomain object is - * to call getProtectionDomain() - * in java.lang.Class. It returns the domain that - * the class belongs to. - * - *

This method is provided for convenience. If you need more - * complex functionality, you should write your own class loader. - * - *

Note: this method calls toClass() - * in ClassPool. - * - * @param loader the class loader used to load this class. - * If it is null, the class loader returned by - * {@link ClassPool#getClassLoader()} is used. - * @param domain the protection domain that the class belongs to. - * If it is null, the default domain created - * by java.lang.ClassLoader is used. - * @see ClassPool#toClass(CtClass,java.lang.ClassLoader) - * @since 3.3 - */ - public Class toClass(ClassLoader loader, ProtectionDomain domain) - throws CannotCompileException - { - ClassPool cp = getClassPool(); - if (loader == null) - loader = cp.getClassLoader(); - - return cp.toClass(this, loader, domain); - } - - /** - * Converts this class to a java.lang.Class object. - * - *

Warining: A Class object returned by this method may not - * work with a security manager or a signed jar file because a - * protection domain is not specified. - * - * @deprecated Replaced by {@link #toClass(ClassLoader,ProtectionDomain)} - */ - public final Class toClass(ClassLoader loader) - throws CannotCompileException - { - return getClassPool().toClass(this, loader); - } - - /** - * Removes this CtClass object from the - * ClassPool. - * After this method is called, any method cannot be called on the - * removed CtClass object. - * - *

If get() in ClassPool is called - * with the name of the removed method, - * the ClassPool will read the class file again - * and constructs another CtClass object representing - * the same class. - */ - public void detach() { - ClassPool cp = getClassPool(); - CtClass obj = cp.removeCached(getName()); - if (obj != this) - cp.cacheCtClass(getName(), obj, false); - } - - /** - * Disallows (or allows) automatically pruning this CtClass - * object. - * - *

- * Javassist can automatically prune a CtClass object - * when toBytecode() (or toClass(), - * writeFile()) is called. - * Since a ClassPool holds all instances of CtClass - * even after toBytecode() (or toClass(), - * writeFile()) is called, pruning may significantly - * save memory consumption. - * - *

If ClassPool.doPruning is true, the automatic pruning - * is on by default. Otherwise, it is off. The default value of - * ClassPool.doPruning is false. - * - * @param stop disallow pruning if true. Otherwise, allow. - * @return the previous status of pruning. true if pruning is already stopped. - * - * @see #detach() - * @see #prune() - * @see ClassPool#doPruning - */ - public boolean stopPruning(boolean stop) { return true; } - - /** - * Discards unnecessary attributes, in particular, - * CodeAttributes (method bodies) of the class, - * to minimize the memory footprint. - * After calling this method, the class is read only. - * It cannot be modified any more. - * Furthermore, toBytecode(), - * writeFile(), toClass(), - * or instrument() cannot be called. - * However, the method names and signatures in the class etc. - * are still accessible. - * - *

toBytecode(), writeFile(), and - * toClass() internally call this method if - * automatic pruning is on. - * - *

According to some experiments, pruning does not really reduce - * memory consumption. Only about 20%. Since pruning takes time, - * it might not pay off. So the automatic pruning is off by default. - * - * @see #stopPruning(boolean) - * @see #detach() - * @see ClassPool#doPruning - * - * @see #toBytecode() - * @see #toClass() - * @see #writeFile() - * @see #instrument(CodeConverter) - * @see #instrument(ExprEditor) - */ - public void prune() {} - - /* Called by get() in ClassPool. - * CtClassType overrides this method. - */ - void incGetCounter() {} - - /** - * If this method is called, the class file will be - * rebuilt when it is finally generated by - * toBytecode() and writeFile(). - * For a performance reason, the symbol table of the - * class file may contain unused entries, for example, - * after a method or a filed is deleted. - * This method - * removes those unused entries. This removal will - * minimize the size of the class file. - * - * @since 3.8.1 - */ - public void rebuildClassFile() {} - - /** - * Converts this class to a class file. - * Once this method is called, further modifications are not - * possible any more. - * - * @return the contents of the class file. - */ - public byte[] toBytecode() throws IOException, CannotCompileException { - ByteArrayOutputStream barray = new ByteArrayOutputStream(); - DataOutputStream out = new DataOutputStream(barray); - try { - toBytecode(out); - } - finally { - out.close(); - } - - return barray.toByteArray(); - } - - /** - * Writes a class file represented by this CtClass - * object in the current directory. - * Once this method is called, further modifications are not - * possible any more. - * - * @see #debugWriteFile() - */ - public void writeFile() - throws NotFoundException, IOException, CannotCompileException - { - writeFile("."); - } - - /** - * Writes a class file represented by this CtClass - * object on a local disk. - * Once this method is called, further modifications are not - * possible any more. - * - * @param directoryName it must end without a directory separator. - * @see #debugWriteFile(String) - */ - public void writeFile(String directoryName) - throws CannotCompileException, IOException - { - DataOutputStream out = makeFileOutput(directoryName); - try { - toBytecode(out); - } - finally { - out.close(); - } - } - - protected DataOutputStream makeFileOutput(String directoryName) { - String classname = getName(); - String filename = directoryName + File.separatorChar - + classname.replace('.', File.separatorChar) + ".class"; - int pos = filename.lastIndexOf(File.separatorChar); - if (pos > 0) { - String dir = filename.substring(0, pos); - if (!dir.equals(".")) - new File(dir).mkdirs(); - } - - return new DataOutputStream(new BufferedOutputStream( - new DelayedFileOutputStream(filename))); - } - - /** - * Writes a class file as writeFile() does although this - * method does not prune or freeze the class after writing the class - * file. Note that, once writeFile() or toBytecode() - * is called, it cannot be called again since the class is pruned and frozen. - * This method would be useful for debugging. - */ - public void debugWriteFile() { - debugWriteFile("."); - } - - /** - * Writes a class file as writeFile() does although this - * method does not prune or freeze the class after writing the class - * file. Note that, once writeFile() or toBytecode() - * is called, it cannot be called again since the class is pruned and frozen. - * This method would be useful for debugging. - * - * @param directoryName it must end without a directory separator. - */ - public void debugWriteFile(String directoryName) { - try { - boolean p = stopPruning(true); - writeFile(directoryName); - defrost(); - stopPruning(p); - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - static class DelayedFileOutputStream extends OutputStream { - private FileOutputStream file; - private String filename; - - DelayedFileOutputStream(String name) { - file = null; - filename = name; - } - - private void init() throws IOException { - if (file == null) - file = new FileOutputStream(filename); - } - - public void write(int b) throws IOException { - init(); - file.write(b); - } - - public void write(byte[] b) throws IOException { - init(); - file.write(b); - } - - public void write(byte[] b, int off, int len) throws IOException { - init(); - file.write(b, off, len); - - } - - public void flush() throws IOException { - init(); - file.flush(); - } - - public void close() throws IOException { - init(); - file.close(); - } - } - - /** - * Converts this class to a class file. - * Once this method is called, further modifications are not - * possible any more. - * - *

This method dose not close the output stream in the end. - * - * @param out the output stream that a class file is written to. - */ - public void toBytecode(DataOutputStream out) - throws CannotCompileException, IOException - { - throw new CannotCompileException("not a class"); - } - - /** - * Makes a unique member name. This method guarantees that - * the returned name is not used as a prefix of any methods - * or fields visible in this class. - * If the returned name is XYZ, then any method or field names - * in this class do not start with XYZ. - * - * @param prefix the prefix of the member name. - */ - public String makeUniqueName(String prefix) { - throw new RuntimeException("not available in " + getName()); - } - - /* Invoked from ClassPool#compress(). - * This method is overridden by CtClassType. - */ - void compress() {} -} diff --git a/src/com/wenshuo/agent/javassist/CtClassType.java b/src/com/wenshuo/agent/javassist/CtClassType.java deleted file mode 100644 index e7774e5..0000000 --- a/src/com/wenshuo/agent/javassist/CtClassType.java +++ /dev/null @@ -1,1761 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.lang.ref.WeakReference; -import java.io.BufferedInputStream; -import java.io.ByteArrayOutputStream; -import java.io.ByteArrayInputStream; -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.net.URL; -import java.util.ArrayList; -import java.util.HashMap; -import java.util.Hashtable; -import java.util.List; -import java.util.Set; - -import com.wenshuo.agent.javassist.bytecode.AccessFlag; -import com.wenshuo.agent.javassist.bytecode.AttributeInfo; -import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.Bytecode; -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.ConstantAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.EnclosingMethodAttribute; -import com.wenshuo.agent.javassist.bytecode.FieldInfo; -import com.wenshuo.agent.javassist.bytecode.InnerClassesAttribute; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.ParameterAnnotationsAttribute; -import com.wenshuo.agent.javassist.bytecode.SignatureAttribute; -import com.wenshuo.agent.javassist.bytecode.annotation.Annotation; -import com.wenshuo.agent.javassist.compiler.AccessorMaker; -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.expr.ExprEditor; - -/** - * Class types. - */ -class CtClassType extends CtClass { - ClassPool classPool; - boolean wasChanged; - private boolean wasFrozen; - boolean wasPruned; - boolean gcConstPool; // if true, the constant pool entries will be garbage collected. - ClassFile classfile; - byte[] rawClassfile; // backup storage - - private WeakReference memberCache; - private AccessorMaker accessors; - - private FieldInitLink fieldInitializers; - private Hashtable hiddenMethods; // must be synchronous - private int uniqueNumberSeed; - - private boolean doPruning = ClassPool.doPruning; - private int getCount; - private static final int GET_THRESHOLD = 2; // see compress() - - CtClassType(String name, ClassPool cp) { - super(name); - classPool = cp; - wasChanged = wasFrozen = wasPruned = gcConstPool = false; - classfile = null; - rawClassfile = null; - memberCache = null; - accessors = null; - fieldInitializers = null; - hiddenMethods = null; - uniqueNumberSeed = 0; - getCount = 0; - } - - CtClassType(InputStream ins, ClassPool cp) throws IOException { - this((String)null, cp); - classfile = new ClassFile(new DataInputStream(ins)); - qualifiedName = classfile.getName(); - } - - CtClassType(ClassFile cf, ClassPool cp) { - this((String)null, cp); - classfile = cf; - qualifiedName = classfile.getName(); - } - - protected void extendToString(StringBuffer buffer) { - if (wasChanged) - buffer.append("changed "); - - if (wasFrozen) - buffer.append("frozen "); - - if (wasPruned) - buffer.append("pruned "); - - buffer.append(Modifier.toString(getModifiers())); - buffer.append(" class "); - buffer.append(getName()); - - try { - CtClass ext = getSuperclass(); - if (ext != null) { - String name = ext.getName(); - if (!name.equals("java.lang.Object")) - buffer.append(" extends " + ext.getName()); - } - } - catch (NotFoundException e) { - buffer.append(" extends ??"); - } - - try { - CtClass[] intf = getInterfaces(); - if (intf.length > 0) - buffer.append(" implements "); - - for (int i = 0; i < intf.length; ++i) { - buffer.append(intf[i].getName()); - buffer.append(", "); - } - } - catch (NotFoundException e) { - buffer.append(" extends ??"); - } - - CtMember.Cache memCache = getMembers(); - exToString(buffer, " fields=", - memCache.fieldHead(), memCache.lastField()); - exToString(buffer, " constructors=", - memCache.consHead(), memCache.lastCons()); - exToString(buffer, " methods=", - memCache.methodHead(), memCache.lastMethod()); - } - - private void exToString(StringBuffer buffer, String msg, - CtMember head, CtMember tail) { - buffer.append(msg); - while (head != tail) { - head = head.next(); - buffer.append(head); - buffer.append(", "); - } - } - - public AccessorMaker getAccessorMaker() { - if (accessors == null) - accessors = new AccessorMaker(this); - - return accessors; - } - - public ClassFile getClassFile2() { - ClassFile cfile = classfile; - if (cfile != null) - return cfile; - - classPool.compress(); - if (rawClassfile != null) { - try { - classfile = new ClassFile(new DataInputStream( - new ByteArrayInputStream(rawClassfile))); - rawClassfile = null; - getCount = GET_THRESHOLD; - return classfile; - } - catch (IOException e) { - throw new RuntimeException(e.toString(), e); - } - } - - InputStream fin = null; - try { - fin = classPool.openClassfile(getName()); - if (fin == null) - throw new NotFoundException(getName()); - - fin = new BufferedInputStream(fin); - ClassFile cf = new ClassFile(new DataInputStream(fin)); - if (!cf.getName().equals(qualifiedName)) - throw new RuntimeException("cannot find " + qualifiedName + ": " - + cf.getName() + " found in " - + qualifiedName.replace('.', '/') + ".class"); - - classfile = cf; - return cf; - } - catch (NotFoundException e) { - throw new RuntimeException(e.toString(), e); - } - catch (IOException e) { - throw new RuntimeException(e.toString(), e); - } - finally { - if (fin != null) - try { - fin.close(); - } - catch (IOException e) {} - } - } - - /* Inherited from CtClass. Called by get() in ClassPool. - * - * @see javassist.CtClass#incGetCounter() - * @see #toBytecode(DataOutputStream) - */ - final void incGetCounter() { ++getCount; } - - /** - * Invoked from ClassPool#compress(). - * It releases the class files that have not been recently used - * if they are unmodified. - */ - void compress() { - if (getCount < GET_THRESHOLD) - if (!isModified() && ClassPool.releaseUnmodifiedClassFile) - removeClassFile(); - else if (isFrozen() && !wasPruned) - saveClassFile(); - - getCount = 0; - } - - /** - * Converts a ClassFile object into a byte array - * for saving memory space. - */ - private synchronized void saveClassFile() { - /* getMembers() and releaseClassFile() are also synchronized. - */ - if (classfile == null || hasMemberCache() != null) - return; - - ByteArrayOutputStream barray = new ByteArrayOutputStream(); - DataOutputStream out = new DataOutputStream(barray); - try { - classfile.write(out); - barray.close(); - rawClassfile = barray.toByteArray(); - classfile = null; - } - catch (IOException e) {} - } - - private synchronized void removeClassFile() { - if (classfile != null && !isModified() && hasMemberCache() == null) - classfile = null; - } - - public ClassPool getClassPool() { return classPool; } - - void setClassPool(ClassPool cp) { classPool = cp; } - - public URL getURL() throws NotFoundException { - URL url = classPool.find(getName()); - if (url == null) - throw new NotFoundException(getName()); - else - return url; - } - - public boolean isModified() { return wasChanged; } - - public boolean isFrozen() { return wasFrozen; } - - public void freeze() { wasFrozen = true; } - - void checkModify() throws RuntimeException { - if (isFrozen()) { - String msg = getName() + " class is frozen"; - if (wasPruned) - msg += " and pruned"; - - throw new RuntimeException(msg); - } - - wasChanged = true; - } - - public void defrost() { - checkPruned("defrost"); - wasFrozen = false; - } - - public boolean subtypeOf(CtClass clazz) throws NotFoundException { - int i; - String cname = clazz.getName(); - if (this == clazz || getName().equals(cname)) - return true; - - ClassFile file = getClassFile2(); - String supername = file.getSuperclass(); - if (supername != null && supername.equals(cname)) - return true; - - String[] ifs = file.getInterfaces(); - int num = ifs.length; - for (i = 0; i < num; ++i) - if (ifs[i].equals(cname)) - return true; - - if (supername != null && classPool.get(supername).subtypeOf(clazz)) - return true; - - for (i = 0; i < num; ++i) - if (classPool.get(ifs[i]).subtypeOf(clazz)) - return true; - - return false; - } - - public void setName(String name) throws RuntimeException { - String oldname = getName(); - if (name.equals(oldname)) - return; - - // check this in advance although classNameChanged() below does. - classPool.checkNotFrozen(name); - ClassFile cf = getClassFile2(); - super.setName(name); - cf.setName(name); - nameReplaced(); - classPool.classNameChanged(oldname, this); - } - - public String getGenericSignature() { - SignatureAttribute sa - = (SignatureAttribute)getClassFile2().getAttribute(SignatureAttribute.tag); - return sa == null ? null : sa.getSignature(); - } - - public void setGenericSignature(String sig) { - ClassFile cf = getClassFile(); - SignatureAttribute sa = new SignatureAttribute(cf.getConstPool(), sig); - cf.addAttribute(sa); - } - - public void replaceClassName(ClassMap classnames) - throws RuntimeException - { - String oldClassName = getName(); - String newClassName - = (String)classnames.get(Descriptor.toJvmName(oldClassName)); - if (newClassName != null) { - newClassName = Descriptor.toJavaName(newClassName); - // check this in advance although classNameChanged() below does. - classPool.checkNotFrozen(newClassName); - } - - super.replaceClassName(classnames); - ClassFile cf = getClassFile2(); - cf.renameClass(classnames); - nameReplaced(); - - if (newClassName != null) { - super.setName(newClassName); - classPool.classNameChanged(oldClassName, this); - } - } - - public void replaceClassName(String oldname, String newname) - throws RuntimeException - { - String thisname = getName(); - if (thisname.equals(oldname)) - setName(newname); - else { - super.replaceClassName(oldname, newname); - getClassFile2().renameClass(oldname, newname); - nameReplaced(); - } - } - - public boolean isInterface() { - return Modifier.isInterface(getModifiers()); - } - - public boolean isAnnotation() { - return Modifier.isAnnotation(getModifiers()); - } - - public boolean isEnum() { - return Modifier.isEnum(getModifiers()); - } - - public int getModifiers() { - ClassFile cf = getClassFile2(); - int acc = cf.getAccessFlags(); - acc = AccessFlag.clear(acc, AccessFlag.SUPER); - int inner = cf.getInnerAccessFlags(); - if (inner != -1 && (inner & AccessFlag.STATIC) != 0) - acc |= AccessFlag.STATIC; - - return AccessFlag.toModifier(acc); - } - - public CtClass[] getNestedClasses() throws NotFoundException { - ClassFile cf = getClassFile2(); - InnerClassesAttribute ica - = (InnerClassesAttribute)cf.getAttribute(InnerClassesAttribute.tag); - if (ica == null) - return new CtClass[0]; - - String thisName = cf.getName() + "$"; - int n = ica.tableLength(); - ArrayList list = new ArrayList(n); - for (int i = 0; i < n; i++) { - String name = ica.innerClass(i); - if (name != null) - if (name.startsWith(thisName)) { - // if it is an immediate nested class - if (name.lastIndexOf('$') < thisName.length()) - list.add(classPool.get(name)); - } - } - - return (CtClass[])list.toArray(new CtClass[list.size()]); - } - - public void setModifiers(int mod) { - ClassFile cf = getClassFile2(); - if (Modifier.isStatic(mod)) { - int flags = cf.getInnerAccessFlags(); - if (flags != -1 && (flags & AccessFlag.STATIC) != 0) - mod = mod & ~Modifier.STATIC; - else - throw new RuntimeException("cannot change " + getName() + " into a static class"); - } - - checkModify(); - cf.setAccessFlags(AccessFlag.of(mod)); - } - - public boolean hasAnnotation(Class clz) { - ClassFile cf = getClassFile2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.visibleTag); - return hasAnnotationType(clz, getClassPool(), ainfo, ainfo2); - } - - static boolean hasAnnotationType(Class clz, ClassPool cp, - AnnotationsAttribute a1, AnnotationsAttribute a2) - { - Annotation[] anno1, anno2; - - if (a1 == null) - anno1 = null; - else - anno1 = a1.getAnnotations(); - - if (a2 == null) - anno2 = null; - else - anno2 = a2.getAnnotations(); - - String typeName = clz.getName(); - if (anno1 != null) - for (int i = 0; i < anno1.length; i++) - if (anno1[i].getTypeName().equals(typeName)) - return true; - - if (anno2 != null) - for (int i = 0; i < anno2.length; i++) - if (anno2[i].getTypeName().equals(typeName)) - return true; - - return false; - } - - public Object getAnnotation(Class clz) throws ClassNotFoundException { - ClassFile cf = getClassFile2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.visibleTag); - return getAnnotationType(clz, getClassPool(), ainfo, ainfo2); - } - - static Object getAnnotationType(Class clz, ClassPool cp, - AnnotationsAttribute a1, AnnotationsAttribute a2) - throws ClassNotFoundException - { - Annotation[] anno1, anno2; - - if (a1 == null) - anno1 = null; - else - anno1 = a1.getAnnotations(); - - if (a2 == null) - anno2 = null; - else - anno2 = a2.getAnnotations(); - - String typeName = clz.getName(); - if (anno1 != null) - for (int i = 0; i < anno1.length; i++) - if (anno1[i].getTypeName().equals(typeName)) - return toAnnoType(anno1[i], cp); - - if (anno2 != null) - for (int i = 0; i < anno2.length; i++) - if (anno2[i].getTypeName().equals(typeName)) - return toAnnoType(anno2[i], cp); - - return null; - } - - public Object[] getAnnotations() throws ClassNotFoundException { - return getAnnotations(false); - } - - public Object[] getAvailableAnnotations(){ - try { - return getAnnotations(true); - } - catch (ClassNotFoundException e) { - throw new RuntimeException("Unexpected exception ", e); - } - } - - private Object[] getAnnotations(boolean ignoreNotFound) - throws ClassNotFoundException - { - ClassFile cf = getClassFile2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - cf.getAttribute(AnnotationsAttribute.visibleTag); - return toAnnotationType(ignoreNotFound, getClassPool(), ainfo, ainfo2); - } - - static Object[] toAnnotationType(boolean ignoreNotFound, ClassPool cp, - AnnotationsAttribute a1, AnnotationsAttribute a2) - throws ClassNotFoundException - { - Annotation[] anno1, anno2; - int size1, size2; - - if (a1 == null) { - anno1 = null; - size1 = 0; - } - else { - anno1 = a1.getAnnotations(); - size1 = anno1.length; - } - - if (a2 == null) { - anno2 = null; - size2 = 0; - } - else { - anno2 = a2.getAnnotations(); - size2 = anno2.length; - } - - if (!ignoreNotFound){ - Object[] result = new Object[size1 + size2]; - for (int i = 0; i < size1; i++) - result[i] = toAnnoType(anno1[i], cp); - - for (int j = 0; j < size2; j++) - result[j + size1] = toAnnoType(anno2[j], cp); - - return result; - } - else{ - ArrayList annotations = new ArrayList(); - for (int i = 0 ; i < size1 ; i++){ - try{ - annotations.add(toAnnoType(anno1[i], cp)); - } - catch(ClassNotFoundException e){} - } - for (int j = 0; j < size2; j++) { - try{ - annotations.add(toAnnoType(anno2[j], cp)); - } - catch(ClassNotFoundException e){} - } - - return annotations.toArray(); - } - } - - static Object[][] toAnnotationType(boolean ignoreNotFound, ClassPool cp, - ParameterAnnotationsAttribute a1, - ParameterAnnotationsAttribute a2, - MethodInfo minfo) - throws ClassNotFoundException - { - int numParameters = 0; - if (a1 != null) - numParameters = a1.numParameters(); - else if (a2 != null) - numParameters = a2.numParameters(); - else - numParameters = Descriptor.numOfParameters(minfo.getDescriptor()); - - Object[][] result = new Object[numParameters][]; - for (int i = 0; i < numParameters; i++) { - Annotation[] anno1, anno2; - int size1, size2; - - if (a1 == null) { - anno1 = null; - size1 = 0; - } - else { - anno1 = a1.getAnnotations()[i]; - size1 = anno1.length; - } - - if (a2 == null) { - anno2 = null; - size2 = 0; - } - else { - anno2 = a2.getAnnotations()[i]; - size2 = anno2.length; - } - - if (!ignoreNotFound){ - result[i] = new Object[size1 + size2]; - for (int j = 0; j < size1; ++j) - result[i][j] = toAnnoType(anno1[j], cp); - - for (int j = 0; j < size2; ++j) - result[i][j + size1] = toAnnoType(anno2[j], cp); - } - else{ - ArrayList annotations = new ArrayList(); - for (int j = 0 ; j < size1 ; j++){ - try{ - annotations.add(toAnnoType(anno1[j], cp)); - } - catch(ClassNotFoundException e){} - } - for (int j = 0; j < size2; j++){ - try{ - annotations.add(toAnnoType(anno2[j], cp)); - } - catch(ClassNotFoundException e){} - } - - result[i] = annotations.toArray(); - } - } - - return result; - } - - private static Object toAnnoType(Annotation anno, ClassPool cp) - throws ClassNotFoundException - { - try { - ClassLoader cl = cp.getClassLoader(); - return anno.toAnnotationType(cl, cp); - } - catch (ClassNotFoundException e) { - ClassLoader cl2 = cp.getClass().getClassLoader(); - try { - return anno.toAnnotationType(cl2, cp); - } - catch (ClassNotFoundException e2){ - try { - Class clazz = cp.get(anno.getTypeName()).toClass(); - return com.wenshuo.agent.javassist.bytecode.annotation.AnnotationImpl.make( - clazz.getClassLoader(), - clazz, cp, anno); - } - catch (Throwable e3) { - throw new ClassNotFoundException(anno.getTypeName()); - } - } - } - } - - public boolean subclassOf(CtClass superclass) { - if (superclass == null) - return false; - - String superName = superclass.getName(); - CtClass curr = this; - try { - while (curr != null) { - if (curr.getName().equals(superName)) - return true; - - curr = curr.getSuperclass(); - } - } - catch (Exception ignored) {} - return false; - } - - public CtClass getSuperclass() throws NotFoundException { - String supername = getClassFile2().getSuperclass(); - if (supername == null) - return null; - else - return classPool.get(supername); - } - - public void setSuperclass(CtClass clazz) throws CannotCompileException { - checkModify(); - if (isInterface()) - addInterface(clazz); - else - getClassFile2().setSuperclass(clazz.getName()); - } - - public CtClass[] getInterfaces() throws NotFoundException { - String[] ifs = getClassFile2().getInterfaces(); - int num = ifs.length; - CtClass[] ifc = new CtClass[num]; - for (int i = 0; i < num; ++i) - ifc[i] = classPool.get(ifs[i]); - - return ifc; - } - - public void setInterfaces(CtClass[] list) { - checkModify(); - String[] ifs; - if (list == null) - ifs = new String[0]; - else { - int num = list.length; - ifs = new String[num]; - for (int i = 0; i < num; ++i) - ifs[i] = list[i].getName(); - } - - getClassFile2().setInterfaces(ifs); - } - - public void addInterface(CtClass anInterface) { - checkModify(); - if (anInterface != null) - getClassFile2().addInterface(anInterface.getName()); - } - - public CtClass getDeclaringClass() throws NotFoundException { - ClassFile cf = getClassFile2(); - InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( - InnerClassesAttribute.tag); - if (ica == null) - return null; - - String name = getName(); - int n = ica.tableLength(); - for (int i = 0; i < n; ++i) - if (name.equals(ica.innerClass(i))) { - String outName = ica.outerClass(i); - if (outName != null) - return classPool.get(outName); - else { - // maybe anonymous or local class. - EnclosingMethodAttribute ema - = (EnclosingMethodAttribute)cf.getAttribute( - EnclosingMethodAttribute.tag); - if (ema != null) - return classPool.get(ema.className()); - } - } - - return null; - } - - public CtBehavior getEnclosingBehavior() throws NotFoundException { - ClassFile cf = getClassFile2(); - EnclosingMethodAttribute ema - = (EnclosingMethodAttribute)cf.getAttribute( - EnclosingMethodAttribute.tag); - if (ema == null) - return null; - else { - CtClass enc = classPool.get(ema.className()); - String name = ema.methodName(); - if (MethodInfo.nameInit.equals(name)) - return enc.getConstructor(ema.methodDescriptor()); - else if(MethodInfo.nameClinit.equals(name)) - return enc.getClassInitializer(); - else - return enc.getMethod(name, ema.methodDescriptor()); - } - } - - public CtClass makeNestedClass(String name, boolean isStatic) { - if (!isStatic) - throw new RuntimeException( - "sorry, only nested static class is supported"); - - checkModify(); - CtClass c = classPool.makeNestedClass(getName() + "$" + name); - ClassFile cf = getClassFile2(); - ClassFile cf2 = c.getClassFile2(); - InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( - InnerClassesAttribute.tag); - if (ica == null) { - ica = new InnerClassesAttribute(cf.getConstPool()); - cf.addAttribute(ica); - } - - ica.append(c.getName(), this.getName(), name, - (cf2.getAccessFlags() & ~AccessFlag.SUPER) | AccessFlag.STATIC); - cf2.addAttribute(ica.copy(cf2.getConstPool(), null)); - return c; - } - - /* flush cached names. - */ - private void nameReplaced() { - CtMember.Cache cache = hasMemberCache(); - if (cache != null) { - CtMember mth = cache.methodHead(); - CtMember tail = cache.lastMethod(); - while (mth != tail) { - mth = mth.next(); - mth.nameReplaced(); - } - } - } - - /** - * Returns null if members are not cached. - */ - protected CtMember.Cache hasMemberCache() { - if (memberCache != null) - return (CtMember.Cache)memberCache.get(); - else - return null; - } - - protected synchronized CtMember.Cache getMembers() { - CtMember.Cache cache = null; - if (memberCache == null - || (cache = (CtMember.Cache)memberCache.get()) == null) { - cache = new CtMember.Cache(this); - makeFieldCache(cache); - makeBehaviorCache(cache); - memberCache = new WeakReference(cache); - } - - return cache; - } - - private void makeFieldCache(CtMember.Cache cache) { - List list = getClassFile2().getFields(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - CtField newField = new CtField(finfo, this); - cache.addField(newField); - } - } - - private void makeBehaviorCache(CtMember.Cache cache) { - List list = getClassFile2().getMethods(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - if (minfo.isMethod()) { - CtMethod newMethod = new CtMethod(minfo, this); - cache.addMethod(newMethod); - } - else { - CtConstructor newCons = new CtConstructor(minfo, this); - cache.addConstructor(newCons); - } - } - } - - public CtField[] getFields() { - ArrayList alist = new ArrayList(); - getFields(alist, this); - return (CtField[])alist.toArray(new CtField[alist.size()]); - } - - private static void getFields(ArrayList alist, CtClass cc) { - int i, num; - if (cc == null) - return; - - try { - getFields(alist, cc.getSuperclass()); - } - catch (NotFoundException e) {} - - try { - CtClass[] ifs = cc.getInterfaces(); - num = ifs.length; - for (i = 0; i < num; ++i) - getFields(alist, ifs[i]); - } - catch (NotFoundException e) {} - - CtMember.Cache memCache = ((CtClassType)cc).getMembers(); - CtMember field = memCache.fieldHead(); - CtMember tail = memCache.lastField(); - while (field != tail) { - field = field.next(); - if (!Modifier.isPrivate(field.getModifiers())) - alist.add(field); - } - } - - public CtField getField(String name, String desc) throws NotFoundException { - CtField f = getField2(name, desc); - return checkGetField(f, name, desc); - } - - private CtField checkGetField(CtField f, String name, String desc) - throws NotFoundException - { - if (f == null) { - String msg = "field: " + name; - if (desc != null) - msg += " type " + desc; - - throw new NotFoundException(msg + " in " + getName()); - } - else - return f; - } - - CtField getField2(String name, String desc) { - CtField df = getDeclaredField2(name, desc); - if (df != null) - return df; - - try { - CtClass[] ifs = getInterfaces(); - int num = ifs.length; - for (int i = 0; i < num; ++i) { - CtField f = ifs[i].getField2(name, desc); - if (f != null) - return f; - } - - CtClass s = getSuperclass(); - if (s != null) - return s.getField2(name, desc); - } - catch (NotFoundException e) {} - return null; - } - - public CtField[] getDeclaredFields() { - CtMember.Cache memCache = getMembers(); - CtMember field = memCache.fieldHead(); - CtMember tail = memCache.lastField(); - int num = CtMember.Cache.count(field, tail); - CtField[] cfs = new CtField[num]; - int i = 0; - while (field != tail) { - field = field.next(); - cfs[i++] = (CtField)field; - } - - return cfs; - } - - public CtField getDeclaredField(String name) throws NotFoundException { - return getDeclaredField(name, null); - } - - public CtField getDeclaredField(String name, String desc) throws NotFoundException { - CtField f = getDeclaredField2(name, desc); - return checkGetField(f, name, desc); - } - - private CtField getDeclaredField2(String name, String desc) { - CtMember.Cache memCache = getMembers(); - CtMember field = memCache.fieldHead(); - CtMember tail = memCache.lastField(); - while (field != tail) { - field = field.next(); - if (field.getName().equals(name) - && (desc == null || desc.equals(field.getSignature()))) - return (CtField)field; - } - - return null; - } - - public CtBehavior[] getDeclaredBehaviors() { - CtMember.Cache memCache = getMembers(); - CtMember cons = memCache.consHead(); - CtMember consTail = memCache.lastCons(); - int cnum = CtMember.Cache.count(cons, consTail); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - int mnum = CtMember.Cache.count(mth, mthTail); - - CtBehavior[] cb = new CtBehavior[cnum + mnum]; - int i = 0; - while (cons != consTail) { - cons = cons.next(); - cb[i++] = (CtBehavior)cons; - } - - while (mth != mthTail) { - mth = mth.next(); - cb[i++] = (CtBehavior)mth; - } - - return cb; - } - - public CtConstructor[] getConstructors() { - CtMember.Cache memCache = getMembers(); - CtMember cons = memCache.consHead(); - CtMember consTail = memCache.lastCons(); - - int n = 0; - CtMember mem = cons; - while (mem != consTail) { - mem = mem.next(); - if (isPubCons((CtConstructor)mem)) - n++; - } - - CtConstructor[] result = new CtConstructor[n]; - int i = 0; - mem = cons; - while (mem != consTail) { - mem = mem.next(); - CtConstructor cc = (CtConstructor)mem; - if (isPubCons(cc)) - result[i++] = cc; - } - - return result; - } - - private static boolean isPubCons(CtConstructor cons) { - return !Modifier.isPrivate(cons.getModifiers()) - && cons.isConstructor(); - } - - public CtConstructor getConstructor(String desc) - throws NotFoundException - { - CtMember.Cache memCache = getMembers(); - CtMember cons = memCache.consHead(); - CtMember consTail = memCache.lastCons(); - - while (cons != consTail) { - cons = cons.next(); - CtConstructor cc = (CtConstructor)cons; - if (cc.getMethodInfo2().getDescriptor().equals(desc) - && cc.isConstructor()) - return cc; - } - - return super.getConstructor(desc); - } - - public CtConstructor[] getDeclaredConstructors() { - CtMember.Cache memCache = getMembers(); - CtMember cons = memCache.consHead(); - CtMember consTail = memCache.lastCons(); - - int n = 0; - CtMember mem = cons; - while (mem != consTail) { - mem = mem.next(); - CtConstructor cc = (CtConstructor)mem; - if (cc.isConstructor()) - n++; - } - - CtConstructor[] result = new CtConstructor[n]; - int i = 0; - mem = cons; - while (mem != consTail) { - mem = mem.next(); - CtConstructor cc = (CtConstructor)mem; - if (cc.isConstructor()) - result[i++] = cc; - } - - return result; - } - - public CtConstructor getClassInitializer() { - CtMember.Cache memCache = getMembers(); - CtMember cons = memCache.consHead(); - CtMember consTail = memCache.lastCons(); - - while (cons != consTail) { - cons = cons.next(); - CtConstructor cc = (CtConstructor)cons; - if (cc.isClassInitializer()) - return cc; - } - - return null; - } - - public CtMethod[] getMethods() { - HashMap h = new HashMap(); - getMethods0(h, this); - return (CtMethod[])h.values().toArray(new CtMethod[h.size()]); - } - - private static void getMethods0(HashMap h, CtClass cc) { - try { - CtClass[] ifs = cc.getInterfaces(); - int size = ifs.length; - for (int i = 0; i < size; ++i) - getMethods0(h, ifs[i]); - } - catch (NotFoundException e) {} - - try { - CtClass s = cc.getSuperclass(); - if (s != null) - getMethods0(h, s); - } - catch (NotFoundException e) {} - - if (cc instanceof CtClassType) { - CtMember.Cache memCache = ((CtClassType)cc).getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - - while (mth != mthTail) { - mth = mth.next(); - if (!Modifier.isPrivate(mth.getModifiers())) - h.put(((CtMethod)mth).getStringRep(), mth); - } - } - } - - public CtMethod getMethod(String name, String desc) - throws NotFoundException - { - CtMethod m = getMethod0(this, name, desc); - if (m != null) - return m; - else - throw new NotFoundException(name + "(..) is not found in " - + getName()); - } - - private static CtMethod getMethod0(CtClass cc, - String name, String desc) { - if (cc instanceof CtClassType) { - CtMember.Cache memCache = ((CtClassType)cc).getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - - while (mth != mthTail) { - mth = mth.next(); - if (mth.getName().equals(name) - && ((CtMethod)mth).getMethodInfo2().getDescriptor().equals(desc)) - return (CtMethod)mth; - } - } - - try { - CtClass s = cc.getSuperclass(); - if (s != null) { - CtMethod m = getMethod0(s, name, desc); - if (m != null) - return m; - } - } - catch (NotFoundException e) {} - - try { - CtClass[] ifs = cc.getInterfaces(); - int size = ifs.length; - for (int i = 0; i < size; ++i) { - CtMethod m = getMethod0(ifs[i], name, desc); - if (m != null) - return m; - } - } - catch (NotFoundException e) {} - return null; - } - - public CtMethod[] getDeclaredMethods() { - CtMember.Cache memCache = getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - int num = CtMember.Cache.count(mth, mthTail); - CtMethod[] cms = new CtMethod[num]; - int i = 0; - while (mth != mthTail) { - mth = mth.next(); - cms[i++] = (CtMethod)mth; - } - - return cms; - } - - public CtMethod[] getDeclaredMethods(String name) throws NotFoundException { - CtMember.Cache memCache = getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - ArrayList methods = new ArrayList(); - while (mth != mthTail) { - mth = mth.next(); - if (mth.getName().equals(name)) - methods.add((CtMethod)mth); - } - - return methods.toArray(new CtMethod[methods.size()]); - } - - public CtMethod getDeclaredMethod(String name) throws NotFoundException { - CtMember.Cache memCache = getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - while (mth != mthTail) { - mth = mth.next(); - if (mth.getName().equals(name)) - return (CtMethod)mth; - } - - throw new NotFoundException(name + "(..) is not found in " - + getName()); - } - - public CtMethod getDeclaredMethod(String name, CtClass[] params) - throws NotFoundException - { - String desc = Descriptor.ofParameters(params); - CtMember.Cache memCache = getMembers(); - CtMember mth = memCache.methodHead(); - CtMember mthTail = memCache.lastMethod(); - - while (mth != mthTail) { - mth = mth.next(); - if (mth.getName().equals(name) - && ((CtMethod)mth).getMethodInfo2().getDescriptor().startsWith(desc)) - return (CtMethod)mth; - } - - throw new NotFoundException(name + "(..) is not found in " - + getName()); - } - - public void addField(CtField f, String init) - throws CannotCompileException - { - addField(f, CtField.Initializer.byExpr(init)); - } - - public void addField(CtField f, CtField.Initializer init) - throws CannotCompileException - { - checkModify(); - if (f.getDeclaringClass() != this) - throw new CannotCompileException("cannot add"); - - if (init == null) - init = f.getInit(); - - if (init != null) { - init.check(f.getSignature()); - int mod = f.getModifiers(); - if (Modifier.isStatic(mod) && Modifier.isFinal(mod)) - try { - ConstPool cp = getClassFile2().getConstPool(); - int index = init.getConstantValue(cp, f.getType()); - if (index != 0) { - f.getFieldInfo2().addAttribute(new ConstantAttribute(cp, index)); - init = null; - } - } - catch (NotFoundException e) {} - } - - getMembers().addField(f); - getClassFile2().addField(f.getFieldInfo2()); - - if (init != null) { - FieldInitLink fil = new FieldInitLink(f, init); - FieldInitLink link = fieldInitializers; - if (link == null) - fieldInitializers = fil; - else { - while (link.next != null) - link = link.next; - - link.next = fil; - } - } - } - - public void removeField(CtField f) throws NotFoundException { - checkModify(); - FieldInfo fi = f.getFieldInfo2(); - ClassFile cf = getClassFile2(); - if (cf.getFields().remove(fi)) { - getMembers().remove(f); - gcConstPool = true; - } - else - throw new NotFoundException(f.toString()); - } - - public CtConstructor makeClassInitializer() - throws CannotCompileException - { - CtConstructor clinit = getClassInitializer(); - if (clinit != null) - return clinit; - - checkModify(); - ClassFile cf = getClassFile2(); - Bytecode code = new Bytecode(cf.getConstPool(), 0, 0); - modifyClassConstructor(cf, code, 0, 0); - return getClassInitializer(); - } - - public void addConstructor(CtConstructor c) - throws CannotCompileException - { - checkModify(); - if (c.getDeclaringClass() != this) - throw new CannotCompileException("cannot add"); - - getMembers().addConstructor(c); - getClassFile2().addMethod(c.getMethodInfo2()); - } - - public void removeConstructor(CtConstructor m) throws NotFoundException { - checkModify(); - MethodInfo mi = m.getMethodInfo2(); - ClassFile cf = getClassFile2(); - if (cf.getMethods().remove(mi)) { - getMembers().remove(m); - gcConstPool = true; - } - else - throw new NotFoundException(m.toString()); - } - - public void addMethod(CtMethod m) throws CannotCompileException { - checkModify(); - if (m.getDeclaringClass() != this) - throw new CannotCompileException("bad declaring class"); - - int mod = m.getModifiers(); - if ((getModifiers() & Modifier.INTERFACE) != 0) { - m.setModifiers(mod | Modifier.PUBLIC); - if ((mod & Modifier.ABSTRACT) == 0) - throw new CannotCompileException( - "an interface method must be abstract: " + m.toString()); - } - - getMembers().addMethod(m); - getClassFile2().addMethod(m.getMethodInfo2()); - if ((mod & Modifier.ABSTRACT) != 0) - setModifiers(getModifiers() | Modifier.ABSTRACT); - } - - public void removeMethod(CtMethod m) throws NotFoundException { - checkModify(); - MethodInfo mi = m.getMethodInfo2(); - ClassFile cf = getClassFile2(); - if (cf.getMethods().remove(mi)) { - getMembers().remove(m); - gcConstPool = true; - } - else - throw new NotFoundException(m.toString()); - } - - public byte[] getAttribute(String name) { - AttributeInfo ai = getClassFile2().getAttribute(name); - if (ai == null) - return null; - else - return ai.get(); - } - - public void setAttribute(String name, byte[] data) { - checkModify(); - ClassFile cf = getClassFile2(); - cf.addAttribute(new AttributeInfo(cf.getConstPool(), name, data)); - } - - public void instrument(CodeConverter converter) - throws CannotCompileException - { - checkModify(); - ClassFile cf = getClassFile2(); - ConstPool cp = cf.getConstPool(); - List list = cf.getMethods(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - converter.doit(this, minfo, cp); - } - } - - public void instrument(ExprEditor editor) - throws CannotCompileException - { - checkModify(); - ClassFile cf = getClassFile2(); - List list = cf.getMethods(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - editor.doit(this, minfo); - } - } - - /** - * @see javassist.CtClass#prune() - * @see javassist.CtClass#stopPruning(boolean) - */ - public void prune() { - if (wasPruned) - return; - - wasPruned = wasFrozen = true; - getClassFile2().prune(); - } - - public void rebuildClassFile() { gcConstPool = true; } - - public void toBytecode(DataOutputStream out) - throws CannotCompileException, IOException - { - try { - if (isModified()) { - checkPruned("toBytecode"); - ClassFile cf = getClassFile2(); - if (gcConstPool) { - cf.compact(); - gcConstPool = false; - } - - modifyClassConstructor(cf); - modifyConstructors(cf); - if (debugDump != null) - dumpClassFile(cf); - - cf.write(out); - out.flush(); - fieldInitializers = null; - if (doPruning) { - // to save memory - cf.prune(); - wasPruned = true; - } - } - else { - classPool.writeClassfile(getName(), out); - // to save memory - // classfile = null; - } - - getCount = 0; - wasFrozen = true; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (IOException e) { - throw new CannotCompileException(e); - } - } - - private void dumpClassFile(ClassFile cf) throws IOException { - DataOutputStream dump = makeFileOutput(debugDump); - try { - cf.write(dump); - } - finally { - dump.close(); - } - } - - /* See also checkModified() - */ - private void checkPruned(String method) { - if (wasPruned) - throw new RuntimeException(method + "(): " + getName() - + " was pruned."); - } - - public boolean stopPruning(boolean stop) { - boolean prev = !doPruning; - doPruning = !stop; - return prev; - } - - private void modifyClassConstructor(ClassFile cf) - throws CannotCompileException, NotFoundException - { - if (fieldInitializers == null) - return; - - Bytecode code = new Bytecode(cf.getConstPool(), 0, 0); - Javac jv = new Javac(code, this); - int stacksize = 0; - boolean doInit = false; - for (FieldInitLink fi = fieldInitializers; fi != null; fi = fi.next) { - CtField f = fi.field; - if (Modifier.isStatic(f.getModifiers())) { - doInit = true; - int s = fi.init.compileIfStatic(f.getType(), f.getName(), - code, jv); - if (stacksize < s) - stacksize = s; - } - } - - if (doInit) // need an initializer for static fileds. - modifyClassConstructor(cf, code, stacksize, 0); - } - - private void modifyClassConstructor(ClassFile cf, Bytecode code, - int stacksize, int localsize) - throws CannotCompileException - { - MethodInfo m = cf.getStaticInitializer(); - if (m == null) { - code.add(Bytecode.RETURN); - code.setMaxStack(stacksize); - code.setMaxLocals(localsize); - m = new MethodInfo(cf.getConstPool(), "", "()V"); - m.setAccessFlags(AccessFlag.STATIC); - m.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(m); - CtMember.Cache cache = hasMemberCache(); - if (cache != null) - cache.addConstructor(new CtConstructor(m, this)); - } - else { - CodeAttribute codeAttr = m.getCodeAttribute(); - if (codeAttr == null) - throw new CannotCompileException("empty "); - - try { - CodeIterator it = codeAttr.iterator(); - int pos = it.insertEx(code.get()); - it.insert(code.getExceptionTable(), pos); - int maxstack = codeAttr.getMaxStack(); - if (maxstack < stacksize) - codeAttr.setMaxStack(stacksize); - - int maxlocals = codeAttr.getMaxLocals(); - if (maxlocals < localsize) - codeAttr.setMaxLocals(localsize); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - try { - m.rebuildStackMapIf6(classPool, cf); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - private void modifyConstructors(ClassFile cf) - throws CannotCompileException, NotFoundException - { - if (fieldInitializers == null) - return; - - ConstPool cp = cf.getConstPool(); - List list = cf.getMethods(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - if (minfo.isConstructor()) { - CodeAttribute codeAttr = minfo.getCodeAttribute(); - if (codeAttr != null) - try { - Bytecode init = new Bytecode(cp, 0, - codeAttr.getMaxLocals()); - CtClass[] params - = Descriptor.getParameterTypes( - minfo.getDescriptor(), - classPool); - int stacksize = makeFieldInitializer(init, params); - insertAuxInitializer(codeAttr, init, stacksize); - minfo.rebuildStackMapIf6(classPool, cf); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - } - } - - private static void insertAuxInitializer(CodeAttribute codeAttr, - Bytecode initializer, - int stacksize) - throws BadBytecode - { - CodeIterator it = codeAttr.iterator(); - int index = it.skipSuperConstructor(); - if (index < 0) { - index = it.skipThisConstructor(); - if (index >= 0) - return; // this() is called. - - // Neither this() or super() is called. - } - - int pos = it.insertEx(initializer.get()); - it.insert(initializer.getExceptionTable(), pos); - int maxstack = codeAttr.getMaxStack(); - if (maxstack < stacksize) - codeAttr.setMaxStack(stacksize); - } - - private int makeFieldInitializer(Bytecode code, CtClass[] parameters) - throws CannotCompileException, NotFoundException - { - int stacksize = 0; - Javac jv = new Javac(code, this); - try { - jv.recordParams(parameters, false); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - - for (FieldInitLink fi = fieldInitializers; fi != null; fi = fi.next) { - CtField f = fi.field; - if (!Modifier.isStatic(f.getModifiers())) { - int s = fi.init.compile(f.getType(), f.getName(), code, - parameters, jv); - if (stacksize < s) - stacksize = s; - } - } - - return stacksize; - } - - // Methods used by CtNewWrappedMethod - - Hashtable getHiddenMethods() { - if (hiddenMethods == null) - hiddenMethods = new Hashtable(); - - return hiddenMethods; - } - - int getUniqueNumber() { return uniqueNumberSeed++; } - - public String makeUniqueName(String prefix) { - HashMap table = new HashMap(); - makeMemberList(table); - Set keys = table.keySet(); - String[] methods = new String[keys.size()]; - keys.toArray(methods); - - if (notFindInArray(prefix, methods)) - return prefix; - - int i = 100; - String name; - do { - if (i > 999) - throw new RuntimeException("too many unique name"); - - name = prefix + i++; - } while (!notFindInArray(name, methods)); - return name; - } - - private static boolean notFindInArray(String prefix, String[] values) { - int len = values.length; - for (int i = 0; i < len; i++) - if (values[i].startsWith(prefix)) - return false; - - return true; - } - - private void makeMemberList(HashMap table) { - int mod = getModifiers(); - if (Modifier.isAbstract(mod) || Modifier.isInterface(mod)) - try { - CtClass[] ifs = getInterfaces(); - int size = ifs.length; - for (int i = 0; i < size; i++) { - CtClass ic =ifs[i]; - if (ic != null && ic instanceof CtClassType) - ((CtClassType)ic).makeMemberList(table); - } - } - catch (NotFoundException e) {} - - try { - CtClass s = getSuperclass(); - if (s != null && s instanceof CtClassType) - ((CtClassType)s).makeMemberList(table); - } - catch (NotFoundException e) {} - - List list = getClassFile2().getMethods(); - int n = list.size(); - for (int i = 0; i < n; i++) { - MethodInfo minfo = (MethodInfo)list.get(i); - table.put(minfo.getName(), this); - } - - list = getClassFile2().getFields(); - n = list.size(); - for (int i = 0; i < n; i++) { - FieldInfo finfo = (FieldInfo)list.get(i); - table.put(finfo.getName(), this); - } - } -} - -class FieldInitLink { - FieldInitLink next; - CtField field; - CtField.Initializer init; - - FieldInitLink(CtField f, CtField.Initializer i) { - next = null; - field = f; - init = i; - } -} diff --git a/src/com/wenshuo/agent/javassist/CtConstructor.java b/src/com/wenshuo/agent/javassist/CtConstructor.java deleted file mode 100644 index 58dd659..0000000 --- a/src/com/wenshuo/agent/javassist/CtConstructor.java +++ /dev/null @@ -1,403 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * An instance of CtConstructor represents a constructor. - * It may represent a static constructor - * (class initializer). To distinguish a constructor and a class - * initializer, call isClassInitializer(). - * - *

See the super class CtBehavior as well since - * a number of useful methods are in CtBehavior. - * - * @see CtClass#getDeclaredConstructors() - * @see CtClass#getClassInitializer() - * @see CtNewConstructor - */ -public final class CtConstructor extends CtBehavior { - protected CtConstructor(MethodInfo minfo, CtClass declaring) { - super(declaring, minfo); - } - - /** - * Creates a constructor with no constructor body. - * The created constructor - * must be added to a class with CtClass.addConstructor(). - * - *

The created constructor does not include a constructor body, - * which must be specified with setBody(). - * - * @param declaring the class to which the created method is added. - * @param parameters a list of the parameter types - * - * @see CtClass#addConstructor(CtConstructor) - * @see CtConstructor#setBody(String) - * @see CtConstructor#setBody(CtConstructor,ClassMap) - */ - public CtConstructor(CtClass[] parameters, CtClass declaring) { - this((MethodInfo)null, declaring); - ConstPool cp = declaring.getClassFile2().getConstPool(); - String desc = Descriptor.ofConstructor(parameters); - methodInfo = new MethodInfo(cp, "", desc); - setModifiers(Modifier.PUBLIC); - } - - /** - * Creates a copy of a CtConstructor object. - * The created constructor must be - * added to a class with CtClass.addConstructor(). - * - *

All occurrences of class names in the created constructor - * are replaced with names specified by - * map if map is not null. - * - *

By default, all the occurrences of the names of the class - * declaring src and the superclass are replaced - * with the name of the class and the superclass that - * the created constructor is added to. - * This is done whichever map is null or not. - * To prevent this replacement, call ClassMap.fix() - * or put() to explicitly specify replacement. - * - *

Note: if the .class notation (for example, - * String.class) is included in an expression, the - * Javac compiler may produce a helper method. - * Since this constructor never - * copies this helper method, the programmers have the responsiblity of - * copying it. Otherwise, use Class.forName() in the - * expression. - * - * @param src the source method. - * @param declaring the class to which the created method is added. - * @param map the hashtable associating original class names - * with substituted names. - * It can be null. - * - * @see CtClass#addConstructor(CtConstructor) - * @see ClassMap#fix(String) - */ - public CtConstructor(CtConstructor src, CtClass declaring, ClassMap map) - throws CannotCompileException - { - this((MethodInfo)null, declaring); - copy(src, true, map); - } - - /** - * Returns true if this object represents a constructor. - */ - public boolean isConstructor() { - return methodInfo.isConstructor(); - } - - /** - * Returns true if this object represents a static initializer. - */ - public boolean isClassInitializer() { - return methodInfo.isStaticInitializer(); - } - - /** - * Returns the constructor name followed by parameter types - * such as javassist.CtConstructor(CtClass[],CtClass). - * - * @since 3.5 - */ - public String getLongName() { - return getDeclaringClass().getName() - + (isConstructor() ? Descriptor.toString(getSignature()) - : ("." + MethodInfo.nameClinit + "()")); - } - - /** - * Obtains the name of this constructor. - * It is the same as the simple name of the class declaring this - * constructor. If this object represents a class initializer, - * then this method returns "<clinit>". - */ - public String getName() { - if (methodInfo.isStaticInitializer()) - return MethodInfo.nameClinit; - else - return declaringClass.getSimpleName(); - } - - /** - * Returns true if the constructor (or static initializer) - * is the default one. This method returns true if the constructor - * takes some arguments but it does not perform anything except - * calling super() (the no-argument constructor of - * the super class). - */ - public boolean isEmpty() { - CodeAttribute ca = getMethodInfo2().getCodeAttribute(); - if (ca == null) - return false; // native or abstract?? - // they are not allowed, though. - - ConstPool cp = ca.getConstPool(); - CodeIterator it = ca.iterator(); - try { - int pos, desc; - int op0 = it.byteAt(it.next()); - return op0 == Opcode.RETURN // empty static initializer - || (op0 == Opcode.ALOAD_0 - && it.byteAt(pos = it.next()) == Opcode.INVOKESPECIAL - && (desc = cp.isConstructor(getSuperclassName(), - it.u16bitAt(pos + 1))) != 0 - && "()V".equals(cp.getUtf8Info(desc)) - && it.byteAt(it.next()) == Opcode.RETURN - && !it.hasNext()); - } - catch (BadBytecode e) {} - return false; - } - - private String getSuperclassName() { - ClassFile cf = declaringClass.getClassFile2(); - return cf.getSuperclass(); - } - - /** - * Returns true if this constructor calls a constructor - * of the super class. This method returns false if it - * calls another constructor of this class by this(). - */ - public boolean callsSuper() throws CannotCompileException { - CodeAttribute codeAttr = methodInfo.getCodeAttribute(); - if (codeAttr != null) { - CodeIterator it = codeAttr.iterator(); - try { - int index = it.skipSuperConstructor(); - return index >= 0; - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - return false; - } - - /** - * Sets a constructor body. - * - * @param src the source code representing the constructor body. - * It must be a single statement or block. - * If it is null, the substituted - * constructor body does nothing except calling - * super(). - */ - public void setBody(String src) throws CannotCompileException { - if (src == null) - if (isClassInitializer()) - src = ";"; - else - src = "super();"; - - super.setBody(src); - } - - /** - * Copies a constructor body from another constructor. - * - *

All occurrences of the class names in the copied body - * are replaced with the names specified by - * map if map is not null. - * - * @param src the method that the body is copied from. - * @param map the hashtable associating original class names - * with substituted names. - * It can be null. - */ - public void setBody(CtConstructor src, ClassMap map) - throws CannotCompileException - { - setBody0(src.declaringClass, src.methodInfo, - declaringClass, methodInfo, map); - } - - /** - * Inserts bytecode just after another constructor in the super class - * or this class is called. - * It does not work if this object represents a class initializer. - * - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - */ - public void insertBeforeBody(String src) throws CannotCompileException { - CtClass cc = declaringClass; - cc.checkModify(); - if (isClassInitializer()) - throw new CannotCompileException("class initializer"); - - CodeAttribute ca = methodInfo.getCodeAttribute(); - CodeIterator iterator = ca.iterator(); - Bytecode b = new Bytecode(methodInfo.getConstPool(), - ca.getMaxStack(), ca.getMaxLocals()); - b.setStackDepth(ca.getMaxStack()); - Javac jv = new Javac(b, cc); - try { - jv.recordParams(getParameterTypes(), false); - jv.compileStmnt(src); - ca.setMaxStack(b.getMaxStack()); - ca.setMaxLocals(b.getMaxLocals()); - iterator.skipConstructor(); - int pos = iterator.insertEx(b.get()); - iterator.insert(b.getExceptionTable(), pos); - methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - /* This method is called by addCatch() in CtBehavior. - * super() and this() must not be in a try statement. - */ - int getStartPosOfBody(CodeAttribute ca) throws CannotCompileException { - CodeIterator ci = ca.iterator(); - try { - ci.skipConstructor(); - return ci.next(); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - /** - * Makes a copy of this constructor and converts it into a method. - * The signature of the mehtod is the same as the that of this constructor. - * The return type is void. The resulting method must be - * appended to the class specified by declaring. - * If this constructor is a static initializer, the resulting method takes - * no parameter. - * - *

An occurrence of another constructor call this() - * or a super constructor call super() is - * eliminated from the resulting method. - * - *

The immediate super class of the class declaring this constructor - * must be also a super class of the class declaring the resulting method. - * If the constructor accesses a field, the class declaring the resulting method - * must also declare a field with the same name and type. - * - * @param name the name of the resulting method. - * @param declaring the class declaring the resulting method. - */ - public CtMethod toMethod(String name, CtClass declaring) - throws CannotCompileException - { - return toMethod(name, declaring, null); - } - - /** - * Makes a copy of this constructor and converts it into a method. - * The signature of the method is the same as the that of this constructor. - * The return type is void. The resulting method must be - * appended to the class specified by declaring. - * If this constructor is a static initializer, the resulting method takes - * no parameter. - * - *

An occurrence of another constructor call this() - * or a super constructor call super() is - * eliminated from the resulting method. - * - *

The immediate super class of the class declaring this constructor - * must be also a super class of the class declaring the resulting method - * (this is obviously true if the second parameter declaring is - * the same as the class declaring this constructor). - * If the constructor accesses a field, the class declaring the resulting method - * must also declare a field with the same name and type. - * - * @param name the name of the resulting method. - * @param declaring the class declaring the resulting method. - * It is normally the same as the class declaring this - * constructor. - * @param map the hash table associating original class names - * with substituted names. The original class names will be - * replaced while making a copy. - * map can be null. - */ - public CtMethod toMethod(String name, CtClass declaring, ClassMap map) - throws CannotCompileException - { - CtMethod method = new CtMethod(null, declaring); - method.copy(this, false, map); - if (isConstructor()) { - MethodInfo minfo = method.getMethodInfo2(); - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca != null) { - removeConsCall(ca); - try { - methodInfo.rebuildStackMapIf6(declaring.getClassPool(), - declaring.getClassFile2()); - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - } - - method.setName(name); - return method; - } - - private static void removeConsCall(CodeAttribute ca) - throws CannotCompileException - { - CodeIterator iterator = ca.iterator(); - try { - int pos = iterator.skipConstructor(); - if (pos >= 0) { - int mref = iterator.u16bitAt(pos + 1); - String desc = ca.getConstPool().getMethodrefType(mref); - int num = Descriptor.numOfParameters(desc) + 1; - if (num > 3) - pos = iterator.insertGapAt(pos, num - 3, false).position; - - iterator.writeByte(Opcode.POP, pos++); // this - iterator.writeByte(Opcode.NOP, pos); - iterator.writeByte(Opcode.NOP, pos + 1); - Descriptor.Iterator it = new Descriptor.Iterator(desc); - while (true) { - it.next(); - if (it.isParameter()) - iterator.writeByte(it.is2byte() ? Opcode.POP2 : Opcode.POP, - pos++); - else - break; - } - } - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtField.java b/src/com/wenshuo/agent/javassist/CtField.java deleted file mode 100644 index 7489d83..0000000 --- a/src/com/wenshuo/agent/javassist/CtField.java +++ /dev/null @@ -1,1406 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.compiler.SymbolTable; -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.compiler.ast.ASTree; -import com.wenshuo.agent.javassist.compiler.ast.IntConst; -import com.wenshuo.agent.javassist.compiler.ast.DoubleConst; -import com.wenshuo.agent.javassist.compiler.ast.StringL; - -/** - * An instance of CtField represents a field. - * - * @see CtClass#getDeclaredFields() - */ -public class CtField extends CtMember { - static final String javaLangString = "java.lang.String"; - - protected FieldInfo fieldInfo; - - /** - * Creates a CtField object. - * The created field must be added to a class - * with CtClass.addField(). - * An initial value of the field is specified - * by a CtField.Initializer object. - * - *

If getter and setter methods are needed, - * call CtNewMethod.getter() and - * CtNewMethod.setter(). - * - * @param type field type - * @param name field name - * @param declaring the class to which the field will be added. - * - * @see CtClass#addField(CtField) - * @see CtNewMethod#getter(String,CtField) - * @see CtNewMethod#setter(String,CtField) - * @see CtField.Initializer - */ - public CtField(CtClass type, String name, CtClass declaring) - throws CannotCompileException - { - this(Descriptor.of(type), name, declaring); - } - - /** - * Creates a copy of the given field. - * The created field must be added to a class - * with CtClass.addField(). - * An initial value of the field is specified - * by a CtField.Initializer object. - * - *

If getter and setter methods are needed, - * call CtNewMethod.getter() and - * CtNewMethod.setter(). - * - * @param src the original field - * @param declaring the class to which the field will be added. - * @see CtNewMethod#getter(String,CtField) - * @see CtNewMethod#setter(String,CtField) - * @see CtField.Initializer - */ - public CtField(CtField src, CtClass declaring) - throws CannotCompileException - { - this(src.fieldInfo.getDescriptor(), src.fieldInfo.getName(), - declaring); - java.util.ListIterator iterator - = src.fieldInfo.getAttributes().listIterator(); - FieldInfo fi = fieldInfo; - fi.setAccessFlags(src.fieldInfo.getAccessFlags()); - ConstPool cp = fi.getConstPool(); - while (iterator.hasNext()) { - AttributeInfo ainfo = (AttributeInfo)iterator.next(); - fi.addAttribute(ainfo.copy(cp, null)); - } - } - - private CtField(String typeDesc, String name, CtClass clazz) - throws CannotCompileException - { - super(clazz); - ClassFile cf = clazz.getClassFile2(); - if (cf == null) - throw new CannotCompileException("bad declaring class: " - + clazz.getName()); - - fieldInfo = new FieldInfo(cf.getConstPool(), name, typeDesc); - } - - CtField(FieldInfo fi, CtClass clazz) { - super(clazz); - fieldInfo = fi; - } - - /** - * Returns a String representation of the object. - */ - public String toString() { - return getDeclaringClass().getName() + "." + getName() - + ":" + fieldInfo.getDescriptor(); - } - - protected void extendToString(StringBuffer buffer) { - buffer.append(' '); - buffer.append(getName()); - buffer.append(' '); - buffer.append(fieldInfo.getDescriptor()); - } - - /* Javac.CtFieldWithInit overrides. - */ - protected ASTree getInitAST() { return null; } - - /* Called by CtClassType.addField(). - */ - Initializer getInit() { - ASTree tree = getInitAST(); - if (tree == null) - return null; - else - return Initializer.byExpr(tree); - } - - /** - * Compiles the given source code and creates a field. - * Examples of the source code are: - * - * 

-     * "public String name;"
-     * "public int k = 3;"
- * - *

Note that the source code ends with ';' - * (semicolon). - * - * @param src the source text. - * @param declaring the class to which the created field is added. - */ - public static CtField make(String src, CtClass declaring) - throws CannotCompileException - { - Javac compiler = new Javac(declaring); - try { - CtMember obj = compiler.compile(src); - if (obj instanceof CtField) - return (CtField)obj; // an instance of Javac.CtFieldWithInit - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - - throw new CannotCompileException("not a field"); - } - - /** - * Returns the FieldInfo representing the field in the class file. - */ - public FieldInfo getFieldInfo() { - declaringClass.checkModify(); - return fieldInfo; - } - - /** - * Returns the FieldInfo representing the field in the class - * file (read only). - * Normal applications do not need calling this method. Use - * getFieldInfo(). - * - *

The FieldInfo object obtained by this method - * is read only. Changes to this object might not be reflected - * on a class file generated by toBytecode(), - * toClass(), etc in CtClass. - * - *

This method is available even if the CtClass - * containing this field is frozen. However, if the class is - * frozen, the FieldInfo might be also pruned. - * - * @see #getFieldInfo() - * @see CtClass#isFrozen() - * @see CtClass#prune() - */ - public FieldInfo getFieldInfo2() { return fieldInfo; } - - /** - * Returns the class declaring the field. - */ - public CtClass getDeclaringClass() { - // this is redundant but for javadoc. - return super.getDeclaringClass(); - } - - /** - * Returns the name of the field. - */ - public String getName() { - return fieldInfo.getName(); - } - - /** - * Changes the name of the field. - */ - public void setName(String newName) { - declaringClass.checkModify(); - fieldInfo.setName(newName); - } - - /** - * Returns the encoded modifiers of the field. - * - * @see Modifier - */ - public int getModifiers() { - return AccessFlag.toModifier(fieldInfo.getAccessFlags()); - } - - /** - * Sets the encoded modifiers of the field. - * - * @see Modifier - */ - public void setModifiers(int mod) { - declaringClass.checkModify(); - fieldInfo.setAccessFlags(AccessFlag.of(mod)); - } - - /** - * Returns true if the class has the specified annotation class. - * - * @param clz the annotation class. - * @return true if the annotation is found, otherwise false. - * @since 3.11 - */ - public boolean hasAnnotation(Class clz) { - FieldInfo fi = getFieldInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.hasAnnotationType(clz, getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the annotation if the class has the specified annotation class. - * For example, if an annotation @Author is associated - * with this field, an Author object is returned. - * The member values can be obtained by calling methods on - * the Author object. - * - * @param clz the annotation class. - * @return the annotation if found, otherwise null. - * @since 3.11 - */ - public Object getAnnotation(Class clz) throws ClassNotFoundException { - FieldInfo fi = getFieldInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.getAnnotationType(clz, getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the annotations associated with this field. - * - * @return an array of annotation-type objects. - * @see #getAvailableAnnotations() - * @since 3.1 - */ - public Object[] getAnnotations() throws ClassNotFoundException { - return getAnnotations(false); - } - - /** - * Returns the annotations associated with this field. - * If any annotations are not on the classpath, they are not included - * in the returned array. - * - * @return an array of annotation-type objects. - * @see #getAnnotations() - * @since 3.3 - */ - public Object[] getAvailableAnnotations(){ - try { - return getAnnotations(true); - } - catch (ClassNotFoundException e) { - throw new RuntimeException("Unexpected exception", e); - } - } - - private Object[] getAnnotations(boolean ignoreNotFound) throws ClassNotFoundException { - FieldInfo fi = getFieldInfo2(); - AnnotationsAttribute ainfo = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.invisibleTag); - AnnotationsAttribute ainfo2 = (AnnotationsAttribute) - fi.getAttribute(AnnotationsAttribute.visibleTag); - return CtClassType.toAnnotationType(ignoreNotFound, getDeclaringClass().getClassPool(), - ainfo, ainfo2); - } - - /** - * Returns the character string representing the type of the field. - * The field signature is represented by a character string - * called a field descriptor, which is defined in the JVM specification. - * If two fields have the same type, - * getSignature() returns the same string. - * - *

Note that the returned string is not the type signature - * contained in the SignatureAttirbute. It is - * a descriptor. - * - * @see javassist.bytecode.Descriptor - * @see #getGenericSignature() - */ - public String getSignature() { - return fieldInfo.getDescriptor(); - } - - /** - * Returns the generic signature of the field. - * It represents a type including type variables. - * - * @see SignatureAttribute#toFieldSignature(String) - * @since 3.17 - */ - public String getGenericSignature() { - SignatureAttribute sa - = (SignatureAttribute)fieldInfo.getAttribute(SignatureAttribute.tag); - return sa == null ? null : sa.getSignature(); - } - - /** - * Set the generic signature of the field. - * It represents a type including type variables. - * See {@link javassist.CtClass#setGenericSignature(String)} - * for a code sample. - * - * @param sig a new generic signature. - * @see javassist.bytecode.SignatureAttribute.ObjectType#encode() - * @since 3.17 - */ - public void setGenericSignature(String sig) { - declaringClass.checkModify(); - fieldInfo.addAttribute(new SignatureAttribute(fieldInfo.getConstPool(), sig)); - } - - /** - * Returns the type of the field. - */ - public CtClass getType() throws NotFoundException { - return Descriptor.toCtClass(fieldInfo.getDescriptor(), - declaringClass.getClassPool()); - } - - /** - * Sets the type of the field. - */ - public void setType(CtClass clazz) { - declaringClass.checkModify(); - fieldInfo.setDescriptor(Descriptor.of(clazz)); - } - - /** - * Returns the value of this field if it is a constant field. - * This method works only if the field type is a primitive type - * or String type. Otherwise, it returns null. - * A constant field is static and final. - * - * @return a Integer, Long, Float, - * Double, Boolean, - * or String object - * representing the constant value. - * null if it is not a constant field - * or if the field type is not a primitive type - * or String. - */ - public Object getConstantValue() { - // When this method is modified, - // see also getConstantFieldValue() in TypeChecker. - - int index = fieldInfo.getConstantValue(); - if (index == 0) - return null; - - ConstPool cp = fieldInfo.getConstPool(); - switch (cp.getTag(index)) { - case ConstPool.CONST_Long : - return new Long(cp.getLongInfo(index)); - case ConstPool.CONST_Float : - return new Float(cp.getFloatInfo(index)); - case ConstPool.CONST_Double : - return new Double(cp.getDoubleInfo(index)); - case ConstPool.CONST_Integer : - int value = cp.getIntegerInfo(index); - // "Z" means boolean type. - if ("Z".equals(fieldInfo.getDescriptor())) - return new Boolean(value != 0); - else - return new Integer(value); - case ConstPool.CONST_String : - return cp.getStringInfo(index); - default : - throw new RuntimeException("bad tag: " + cp.getTag(index) - + " at " + index); - } - } - - /** - * Obtains an attribute with the given name. - * If that attribute is not found in the class file, this - * method returns null. - * - *

Note that an attribute is a data block specified by - * the class file format. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - */ - public byte[] getAttribute(String name) { - AttributeInfo ai = fieldInfo.getAttribute(name); - if (ai == null) - return null; - else - return ai.get(); - } - - /** - * Adds an attribute. The attribute is saved in the class file. - * - *

Note that an attribute is a data block specified by - * the class file format. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - * @param data attribute value - */ - public void setAttribute(String name, byte[] data) { - declaringClass.checkModify(); - fieldInfo.addAttribute(new AttributeInfo(fieldInfo.getConstPool(), - name, data)); - } - - // inner classes - - /** - * Instances of this class specify how to initialize a field. - * Initializer is passed to - * CtClass.addField() with a CtField. - * - *

This class cannot be instantiated with the new operator. - * Factory methods such as byParameter() and - * byNew - * must be used for the instantiation. They create a new instance with - * the given parameters and return it. - * - * @see CtClass#addField(CtField,CtField.Initializer) - */ - public static abstract class Initializer { - /** - * Makes an initializer that assigns a constant integer value. - * The field must be integer, short, char, or byte type. - */ - public static Initializer constant(int i) { - return new IntInitializer(i); - } - - /** - * Makes an initializer that assigns a constant boolean value. - * The field must be boolean type. - */ - public static Initializer constant(boolean b) { - return new IntInitializer(b ? 1 : 0); - } - - /** - * Makes an initializer that assigns a constant long value. - * The field must be long type. - */ - public static Initializer constant(long l) { - return new LongInitializer(l); - } - - /** - * Makes an initializer that assigns a constant float value. - * The field must be float type. - */ - public static Initializer constant(float l) { - return new FloatInitializer(l); - } - - /** - * Makes an initializer that assigns a constant double value. - * The field must be double type. - */ - public static Initializer constant(double d) { - return new DoubleInitializer(d); - } - - /** - * Makes an initializer that assigns a constant string value. - * The field must be java.lang.String type. - */ - public static Initializer constant(String s) { - return new StringInitializer(s); - } - - /** - * Makes an initializer using a constructor parameter. - * - *

The initial value is the - * N-th parameter given to the constructor of the object including - * the field. If the constructor takes less than N parameters, - * the field is not initialized. - * If the field is static, it is never initialized. - * - * @param nth the n-th (>= 0) parameter is used as - * the initial value. - * If nth is 0, then the first parameter is - * used. - */ - public static Initializer byParameter(int nth) { - ParamInitializer i = new ParamInitializer(); - i.nthParam = nth; - return i; - } - - /** - * Makes an initializer creating a new object. - * - *

This initializer creates a new object and uses it as the initial - * value of the field. The constructor of the created object receives - * the parameter: - * - *

Object obj - the object including the field. - * - *

If the initialized field is static, then the constructor does - * not receive any parameters. - * - * @param objectType the class instantiated for the initial value. - */ - public static Initializer byNew(CtClass objectType) { - NewInitializer i = new NewInitializer(); - i.objectType = objectType; - i.stringParams = null; - i.withConstructorParams = false; - return i; - } - - /** - * Makes an initializer creating a new object. - * - *

This initializer creates a new object and uses it as the initial - * value of the field. The constructor of the created object receives - * the parameters: - * - *

Object obj - the object including the field.
- * String[] strs - the character strings specified - * by stringParams
- * - *

If the initialized field is static, then the constructor - * receives only strs. - * - * @param objectType the class instantiated for the initial value. - * @param stringParams the array of strings passed to the - * constructor. - */ - public static Initializer byNew(CtClass objectType, - String[] stringParams) { - NewInitializer i = new NewInitializer(); - i.objectType = objectType; - i.stringParams = stringParams; - i.withConstructorParams = false; - return i; - } - - /** - * Makes an initializer creating a new object. - * - *

This initializer creates a new object and uses it as the initial - * value of the field. The constructor of the created object receives - * the parameters: - * - *

Object obj - the object including the field.
- * Object[] args - the parameters passed to the - * constructor of the object including the - * filed. - * - *

If the initialized field is static, then the constructor does - * not receive any parameters. - * - * @param objectType the class instantiated for the initial value. - * - * @see javassist.CtField.Initializer#byNewArray(CtClass,int) - * @see javassist.CtField.Initializer#byNewArray(CtClass,int[]) - */ - public static Initializer byNewWithParams(CtClass objectType) { - NewInitializer i = new NewInitializer(); - i.objectType = objectType; - i.stringParams = null; - i.withConstructorParams = true; - return i; - } - - /** - * Makes an initializer creating a new object. - * - *

This initializer creates a new object and uses it as the initial - * value of the field. The constructor of the created object receives - * the parameters: - * - *

Object obj - the object including the field.
- * String[] strs - the character strings specified - * by stringParams
- * Object[] args - the parameters passed to the - * constructor of the object including the - * filed. - * - *

If the initialized field is static, then the constructor receives - * only strs. - * - * @param objectType the class instantiated for the initial value. - * @param stringParams the array of strings passed to the - * constructor. - */ - public static Initializer byNewWithParams(CtClass objectType, - String[] stringParams) { - NewInitializer i = new NewInitializer(); - i.objectType = objectType; - i.stringParams = stringParams; - i.withConstructorParams = true; - return i; - } - - /** - * Makes an initializer calling a static method. - * - *

This initializer calls a static method and uses the returned - * value as the initial value of the field. - * The called method receives the parameters: - * - *

Object obj - the object including the field. - * - *

If the initialized field is static, then the method does - * not receive any parameters. - * - *

The type of the returned value must be the same as the field - * type. - * - * @param methodClass the class that the static method is - * declared in. - * @param methodName the name of the satic method. - */ - public static Initializer byCall(CtClass methodClass, - String methodName) { - MethodInitializer i = new MethodInitializer(); - i.objectType = methodClass; - i.methodName = methodName; - i.stringParams = null; - i.withConstructorParams = false; - return i; - } - - /** - * Makes an initializer calling a static method. - * - *

This initializer calls a static method and uses the returned - * value as the initial value of the field. The called method - * receives the parameters: - * - *

Object obj - the object including the field.
- * String[] strs - the character strings specified - * by stringParams
- * - *

If the initialized field is static, then the method - * receive only strs. - * - *

The type of the returned value must be the same as the field - * type. - * - * @param methodClass the class that the static method is - * declared in. - * @param methodName the name of the satic method. - * @param stringParams the array of strings passed to the - * static method. - */ - public static Initializer byCall(CtClass methodClass, - String methodName, - String[] stringParams) { - MethodInitializer i = new MethodInitializer(); - i.objectType = methodClass; - i.methodName = methodName; - i.stringParams = stringParams; - i.withConstructorParams = false; - return i; - } - - /** - * Makes an initializer calling a static method. - * - *

This initializer calls a static method and uses the returned - * value as the initial value of the field. The called method - * receives the parameters: - * - *

Object obj - the object including the field.
- * Object[] args - the parameters passed to the - * constructor of the object including the - * filed. - * - *

If the initialized field is static, then the method does - * not receive any parameters. - * - *

The type of the returned value must be the same as the field - * type. - * - * @param methodClass the class that the static method is - * declared in. - * @param methodName the name of the satic method. - */ - public static Initializer byCallWithParams(CtClass methodClass, - String methodName) { - MethodInitializer i = new MethodInitializer(); - i.objectType = methodClass; - i.methodName = methodName; - i.stringParams = null; - i.withConstructorParams = true; - return i; - } - - /** - * Makes an initializer calling a static method. - * - *

This initializer calls a static method and uses the returned - * value as the initial value of the field. The called method - * receives the parameters: - * - *

Object obj - the object including the field.
- * String[] strs - the character strings specified - * by stringParams
- * Object[] args - the parameters passed to the - * constructor of the object including the - * filed. - * - *

If the initialized field is static, then the method - * receive only strs. - * - *

The type of the returned value must be the same as the field - * type. - * - * @param methodClass the class that the static method is - * declared in. - * @param methodName the name of the satic method. - * @param stringParams the array of strings passed to the - * static method. - */ - public static Initializer byCallWithParams(CtClass methodClass, - String methodName, String[] stringParams) { - MethodInitializer i = new MethodInitializer(); - i.objectType = methodClass; - i.methodName = methodName; - i.stringParams = stringParams; - i.withConstructorParams = true; - return i; - } - - /** - * Makes an initializer creating a new array. - * - * @param type the type of the array. - * @param size the size of the array. - * @throws NotFoundException if the type of the array components - * is not found. - */ - public static Initializer byNewArray(CtClass type, int size) - throws NotFoundException - { - return new ArrayInitializer(type.getComponentType(), size); - } - - /** - * Makes an initializer creating a new multi-dimensional array. - * - * @param type the type of the array. - * @param sizes an int array of the size in every - * dimension. - * The first element is the size in the first - * dimension. The second is in the second, etc. - */ - public static Initializer byNewArray(CtClass type, int[] sizes) { - return new MultiArrayInitializer(type, sizes); - } - - /** - * Makes an initializer. - * - * @param source initializer expression. - */ - public static Initializer byExpr(String source) { - return new CodeInitializer(source); - } - - static Initializer byExpr(ASTree source) { - return new PtreeInitializer(source); - } - - // Check whether this initializer is valid for the field type. - // If it is invaild, this method throws an exception. - void check(String desc) throws CannotCompileException {} - - // produce codes for initialization - abstract int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException; - - // produce codes for initialization - abstract int compileIfStatic(CtClass type, String name, - Bytecode code, Javac drv) throws CannotCompileException; - - // returns the index of CONSTANT_Integer_info etc - // if the value is constant. Otherwise, 0. - int getConstantValue(ConstPool cp, CtClass type) { return 0; } - } - - static abstract class CodeInitializer0 extends Initializer { - abstract void compileExpr(Javac drv) throws CompileError; - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - try { - code.addAload(0); - compileExpr(drv); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return code.getMaxStack(); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - try { - compileExpr(drv); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return code.getMaxStack(); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - } - - int getConstantValue2(ConstPool cp, CtClass type, ASTree tree) { - if (type.isPrimitive()) { - if (tree instanceof IntConst) { - long value = ((IntConst)tree).get(); - if (type == CtClass.doubleType) - return cp.addDoubleInfo((double)value); - else if (type == CtClass.floatType) - return cp.addFloatInfo((float)value); - else if (type == CtClass.longType) - return cp.addLongInfo(value); - else if (type != CtClass.voidType) - return cp.addIntegerInfo((int)value); - } - else if (tree instanceof DoubleConst) { - double value = ((DoubleConst)tree).get(); - if (type == CtClass.floatType) - return cp.addFloatInfo((float)value); - else if (type == CtClass.doubleType) - return cp.addDoubleInfo(value); - } - } - else if (tree instanceof StringL - && type.getName().equals(javaLangString)) - return cp.addStringInfo(((StringL)tree).get()); - - return 0; - } - } - - static class CodeInitializer extends CodeInitializer0 { - private String expression; - - CodeInitializer(String expr) { expression = expr; } - - void compileExpr(Javac drv) throws CompileError { - drv.compileExpr(expression); - } - - int getConstantValue(ConstPool cp, CtClass type) { - try { - ASTree t = Javac.parseExpr(expression, new SymbolTable()); - return getConstantValue2(cp, type, t); - } - catch (CompileError e) { - return 0; - } - } - } - - static class PtreeInitializer extends CodeInitializer0 { - private ASTree expression; - - PtreeInitializer(ASTree expr) { expression = expr; } - - void compileExpr(Javac drv) throws CompileError { - drv.compileExpr(expression); - } - - int getConstantValue(ConstPool cp, CtClass type) { - return getConstantValue2(cp, type, expression); - } - } - - /** - * A field initialized with a parameter passed to the constructor - * of the class containing that field. - */ - static class ParamInitializer extends Initializer { - int nthParam; - - ParamInitializer() {} - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - if (parameters != null && nthParam < parameters.length) { - code.addAload(0); - int nth = nthParamToLocal(nthParam, parameters, false); - int s = code.addLoad(nth, type) + 1; - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return s; // stack size - } - else - return 0; // do not initialize - } - - /** - * Computes the index of the local variable that the n-th parameter - * is assigned to. - * - * @param nth n-th parameter - * @param params list of parameter types - * @param isStatic true if the method is static. - */ - static int nthParamToLocal(int nth, CtClass[] params, - boolean isStatic) { - CtClass longType = CtClass.longType; - CtClass doubleType = CtClass.doubleType; - int k; - if (isStatic) - k = 0; - else - k = 1; // 0 is THIS. - - for (int i = 0; i < nth; ++i) { - CtClass type = params[i]; - if (type == longType || type == doubleType) - k += 2; - else - ++k; - } - - return k; - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - return 0; - } - } - - /** - * A field initialized with an object created by the new operator. - */ - static class NewInitializer extends Initializer { - CtClass objectType; - String[] stringParams; - boolean withConstructorParams; - - NewInitializer() {} - - /** - * Produces codes in which a new object is created and assigned to - * the field as the initial value. - */ - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - int stacksize; - - code.addAload(0); - code.addNew(objectType); - code.add(Bytecode.DUP); - code.addAload(0); - - if (stringParams == null) - stacksize = 4; - else - stacksize = compileStringParameter(code) + 4; - - if (withConstructorParams) - stacksize += CtNewWrappedMethod.compileParameterList(code, - parameters, 1); - - code.addInvokespecial(objectType, "", getDescriptor()); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return stacksize; - } - - private String getDescriptor() { - final String desc3 - = "(Ljava/lang/Object;[Ljava/lang/String;[Ljava/lang/Object;)V"; - - if (stringParams == null) - if (withConstructorParams) - return "(Ljava/lang/Object;[Ljava/lang/Object;)V"; - else - return "(Ljava/lang/Object;)V"; - else - if (withConstructorParams) - return desc3; - else - return "(Ljava/lang/Object;[Ljava/lang/String;)V"; - } - - /** - * Produces codes for a static field. - */ - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - String desc; - - code.addNew(objectType); - code.add(Bytecode.DUP); - - int stacksize = 2; - if (stringParams == null) - desc = "()V"; - else { - desc = "([Ljava/lang/String;)V"; - stacksize += compileStringParameter(code); - } - - code.addInvokespecial(objectType, "", desc); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return stacksize; - } - - protected final int compileStringParameter(Bytecode code) - throws CannotCompileException - { - int nparam = stringParams.length; - code.addIconst(nparam); - code.addAnewarray(javaLangString); - for (int j = 0; j < nparam; ++j) { - code.add(Bytecode.DUP); // dup - code.addIconst(j); // iconst_ - code.addLdc(stringParams[j]); // ldc ... - code.add(Bytecode.AASTORE); // aastore - } - - return 4; - } - - } - - /** - * A field initialized with the result of a static method call. - */ - static class MethodInitializer extends NewInitializer { - String methodName; - // the method class is specified by objectType. - - MethodInitializer() {} - - /** - * Produces codes in which a new object is created and assigned to - * the field as the initial value. - */ - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - int stacksize; - - code.addAload(0); - code.addAload(0); - - if (stringParams == null) - stacksize = 2; - else - stacksize = compileStringParameter(code) + 2; - - if (withConstructorParams) - stacksize += CtNewWrappedMethod.compileParameterList(code, - parameters, 1); - - String typeDesc = Descriptor.of(type); - String mDesc = getDescriptor() + typeDesc; - code.addInvokestatic(objectType, methodName, mDesc); - code.addPutfield(Bytecode.THIS, name, typeDesc); - return stacksize; - } - - private String getDescriptor() { - final String desc3 - = "(Ljava/lang/Object;[Ljava/lang/String;[Ljava/lang/Object;)"; - - if (stringParams == null) - if (withConstructorParams) - return "(Ljava/lang/Object;[Ljava/lang/Object;)"; - else - return "(Ljava/lang/Object;)"; - else - if (withConstructorParams) - return desc3; - else - return "(Ljava/lang/Object;[Ljava/lang/String;)"; - } - - /** - * Produces codes for a static field. - */ - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - String desc; - - int stacksize = 1; - if (stringParams == null) - desc = "()"; - else { - desc = "([Ljava/lang/String;)"; - stacksize += compileStringParameter(code); - } - - String typeDesc = Descriptor.of(type); - code.addInvokestatic(objectType, methodName, desc + typeDesc); - code.addPutstatic(Bytecode.THIS, name, typeDesc); - return stacksize; - } - } - - static class IntInitializer extends Initializer { - int value; - - IntInitializer(int v) { value = v; } - - void check(String desc) throws CannotCompileException { - char c = desc.charAt(0); - if (c != 'I' && c != 'S' && c != 'B' && c != 'C' && c != 'Z') - throw new CannotCompileException("type mismatch"); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - code.addIconst(value); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - code.addIconst(value); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 1; // stack size - } - - int getConstantValue(ConstPool cp, CtClass type) { - return cp.addIntegerInfo(value); - } - } - - static class LongInitializer extends Initializer { - long value; - - LongInitializer(long v) { value = v; } - - void check(String desc) throws CannotCompileException { - if (!desc.equals("J")) - throw new CannotCompileException("type mismatch"); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - code.addLdc2w(value); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 3; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - code.addLdc2w(value); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int getConstantValue(ConstPool cp, CtClass type) { - if (type == CtClass.longType) - return cp.addLongInfo(value); - else - return 0; - } - } - - static class FloatInitializer extends Initializer { - float value; - - FloatInitializer(float v) { value = v; } - - void check(String desc) throws CannotCompileException { - if (!desc.equals("F")) - throw new CannotCompileException("type mismatch"); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - code.addFconst(value); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 3; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - code.addFconst(value); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int getConstantValue(ConstPool cp, CtClass type) { - if (type == CtClass.floatType) - return cp.addFloatInfo(value); - else - return 0; - } - } - - static class DoubleInitializer extends Initializer { - double value; - - DoubleInitializer(double v) { value = v; } - - void check(String desc) throws CannotCompileException { - if (!desc.equals("D")) - throw new CannotCompileException("type mismatch"); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - code.addLdc2w(value); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 3; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - code.addLdc2w(value); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int getConstantValue(ConstPool cp, CtClass type) { - if (type == CtClass.doubleType) - return cp.addDoubleInfo(value); - else - return 0; - } - } - - static class StringInitializer extends Initializer { - String value; - - StringInitializer(String v) { value = v; } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - code.addLdc(value); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - code.addLdc(value); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 1; // stack size - } - - int getConstantValue(ConstPool cp, CtClass type) { - if (type.getName().equals(javaLangString)) - return cp.addStringInfo(value); - else - return 0; - } - } - - static class ArrayInitializer extends Initializer { - CtClass type; - int size; - - ArrayInitializer(CtClass t, int s) { type = t; size = s; } - - private void addNewarray(Bytecode code) { - if (type.isPrimitive()) - code.addNewarray(((CtPrimitiveType)type).getArrayType(), - size); - else - code.addAnewarray(type, size); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - addNewarray(code); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return 2; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - addNewarray(code); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return 1; // stack size - } - } - - static class MultiArrayInitializer extends Initializer { - CtClass type; - int[] dim; - - MultiArrayInitializer(CtClass t, int[] d) { type = t; dim = d; } - - void check(String desc) throws CannotCompileException { - if (desc.charAt(0) != '[') - throw new CannotCompileException("type mismatch"); - } - - int compile(CtClass type, String name, Bytecode code, - CtClass[] parameters, Javac drv) - throws CannotCompileException - { - code.addAload(0); - int s = code.addMultiNewarray(type, dim); - code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); - return s + 1; // stack size - } - - int compileIfStatic(CtClass type, String name, Bytecode code, - Javac drv) throws CannotCompileException - { - int s = code.addMultiNewarray(type, dim); - code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); - return s; // stack size - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtMember.java b/src/com/wenshuo/agent/javassist/CtMember.java deleted file mode 100644 index 2e83f97..0000000 --- a/src/com/wenshuo/agent/javassist/CtMember.java +++ /dev/null @@ -1,319 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -/** - * An instance of CtMember represents a field, a constructor, - * or a method. - */ -public abstract class CtMember { - CtMember next; // for internal use - protected CtClass declaringClass; - - /* Make a circular link of CtMembers declared in the - * same class so that they are garbage-collected together - * at the same time. - */ - static class Cache extends CtMember { - protected void extendToString(StringBuffer buffer) {} - public boolean hasAnnotation(Class clz) { return false; } - public Object getAnnotation(Class clz) - throws ClassNotFoundException { return null; } - public Object[] getAnnotations() - throws ClassNotFoundException { return null; } - public byte[] getAttribute(String name) { return null; } - public Object[] getAvailableAnnotations() { return null; } - public int getModifiers() { return 0; } - public String getName() { return null; } - public String getSignature() { return null; } - public void setAttribute(String name, byte[] data) {} - public void setModifiers(int mod) {} - public String getGenericSignature() { return null; } - public void setGenericSignature(String sig) {} - - private CtMember methodTail; - private CtMember consTail; // constructor tail - private CtMember fieldTail; - - Cache(CtClassType decl) { - super(decl); - methodTail = this; - consTail = this; - fieldTail = this; - fieldTail.next = this; - } - - CtMember methodHead() { return this; } - CtMember lastMethod() { return methodTail; } - CtMember consHead() { return methodTail; } // may include a static initializer - CtMember lastCons() { return consTail; } - CtMember fieldHead() { return consTail; } - CtMember lastField() { return fieldTail; } - - void addMethod(CtMember method) { - method.next = methodTail.next; - methodTail.next = method; - if (methodTail == consTail) { - consTail = method; - if (methodTail == fieldTail) - fieldTail = method; - } - - methodTail = method; - } - - /* Both constructors and a class initializer. - */ - void addConstructor(CtMember cons) { - cons.next = consTail.next; - consTail.next = cons; - if (consTail == fieldTail) - fieldTail = cons; - - consTail = cons; - } - - void addField(CtMember field) { - field.next = this; // or fieldTail.next - fieldTail.next = field; - fieldTail = field; - } - - static int count(CtMember head, CtMember tail) { - int n = 0; - while (head != tail) { - n++; - head = head.next; - } - - return n; - } - - void remove(CtMember mem) { - CtMember m = this; - CtMember node; - while ((node = m.next) != this) { - if (node == mem) { - m.next = node.next; - if (node == methodTail) - methodTail = m; - - if (node == consTail) - consTail = m; - - if (node == fieldTail) - fieldTail = m; - - break; - } - else - m = m.next; - } - } - } - - protected CtMember(CtClass clazz) { - declaringClass = clazz; - next = null; - } - - final CtMember next() { return next; } - - /** - * This method is invoked when setName() or replaceClassName() - * in CtClass is called. - * - * @see CtMethod#nameReplaced() - */ - void nameReplaced() {} - - public String toString() { - StringBuffer buffer = new StringBuffer(getClass().getName()); - buffer.append("@"); - buffer.append(Integer.toHexString(hashCode())); - buffer.append("["); - buffer.append(Modifier.toString(getModifiers())); - extendToString(buffer); - buffer.append("]"); - return buffer.toString(); - } - - /** - * Invoked by {@link #toString()} to add to the buffer and provide the - * complete value. Subclasses should invoke this method, adding a - * space before each token. The modifiers for the member are - * provided first; subclasses should provide additional data such - * as return type, field or method name, etc. - */ - protected abstract void extendToString(StringBuffer buffer); - - /** - * Returns the class that declares this member. - */ - public CtClass getDeclaringClass() { return declaringClass; } - - /** - * Returns true if this member is accessible from the given class. - */ - public boolean visibleFrom(CtClass clazz) { - int mod = getModifiers(); - if (Modifier.isPublic(mod)) - return true; - else if (Modifier.isPrivate(mod)) - return clazz == declaringClass; - else { // package or protected - String declName = declaringClass.getPackageName(); - String fromName = clazz.getPackageName(); - boolean visible; - if (declName == null) - visible = fromName == null; - else - visible = declName.equals(fromName); - - if (!visible && Modifier.isProtected(mod)) - return clazz.subclassOf(declaringClass); - - return visible; - } - } - - /** - * Obtains the modifiers of the member. - * - * @return modifiers encoded with - * javassist.Modifier. - * @see Modifier - */ - public abstract int getModifiers(); - - /** - * Sets the encoded modifiers of the member. - * - * @see Modifier - */ - public abstract void setModifiers(int mod); - - /** - * Returns true if the class has the specified annotation class. - * - * @param clz the annotation class. - * @return true if the annotation is found, otherwise false. - * @since 3.11 - */ - public abstract boolean hasAnnotation(Class clz); - - /** - * Returns the annotation if the class has the specified annotation class. - * For example, if an annotation @Author is associated - * with this member, an Author object is returned. - * The member values can be obtained by calling methods on - * the Author object. - * - * @param clz the annotation class. - * @return the annotation if found, otherwise null. - * @since 3.11 - */ - public abstract Object getAnnotation(Class clz) throws ClassNotFoundException; - - /** - * Returns the annotations associated with this member. - * For example, if an annotation @Author is associated - * with this member, the returned array contains an Author - * object. The member values can be obtained by calling methods on - * the Author object. - * - * @return an array of annotation-type objects. - * @see CtClass#getAnnotations() - */ - public abstract Object[] getAnnotations() throws ClassNotFoundException; - - /** - * Returns the annotations associated with this member. - * This method is equivalent to getAnnotations() - * except that, if any annotations are not on the classpath, - * they are not included in the returned array. - * - * @return an array of annotation-type objects. - * @see #getAnnotations() - * @see CtClass#getAvailableAnnotations() - * @since 3.3 - */ - public abstract Object[] getAvailableAnnotations(); - - /** - * Obtains the name of the member. - * - *

As for constructor names, see getName() - * in CtConstructor. - * - * @see CtConstructor#getName() - */ - public abstract String getName(); - - /** - * Returns the character string representing the signature of the member. - * If two members have the same signature (parameter types etc.), - * getSignature() returns the same string. - */ - public abstract String getSignature(); - - /** - * Returns the generic signature of the member. - * - * @see javassist.bytecode.SignatureAttribute#toFieldSignature(String) - * @see javassist.bytecode.SignatureAttribute#toMethodSignature(String) - * @see CtClass#getGenericSignature() - * @since 3.17 - */ - public abstract String getGenericSignature(); - - /** - * Sets the generic signature of the member. - * - * @param sig a new generic signature. - * @see javassist.bytecode.SignatureAttribute.ObjectType#encode() - * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() - * @see CtClass#setGenericSignature(String) - * @since 3.17 - */ - public abstract void setGenericSignature(String sig); - - /** - * Obtains a user-defined attribute with the given name. - * If that attribute is not found in the class file, this - * method returns null. - * - *

Note that an attribute is a data block specified by - * the class file format. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - */ - public abstract byte[] getAttribute(String name); - - /** - * Adds a user-defined attribute. The attribute is saved in the class file. - * - *

Note that an attribute is a data block specified by - * the class file format. - * See {@link javassist.bytecode.AttributeInfo}. - * - * @param name attribute name - * @param data attribute value - */ - public abstract void setAttribute(String name, byte[] data); -} diff --git a/src/com/wenshuo/agent/javassist/CtMethod.java b/src/com/wenshuo/agent/javassist/CtMethod.java deleted file mode 100644 index 42d9f22..0000000 --- a/src/com/wenshuo/agent/javassist/CtMethod.java +++ /dev/null @@ -1,438 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; - -/** - * An instance of CtMethod represents a method. - * - *

See the super class CtBehavior since - * a number of useful methods are in CtBehavior. - * A number of useful factory methods are in CtNewMethod. - * - * @see CtClass#getDeclaredMethods() - * @see CtNewMethod - */ -public final class CtMethod extends CtBehavior { - protected String cachedStringRep; - - /** - * @see #make(MethodInfo minfo, CtClass declaring) - */ - CtMethod(MethodInfo minfo, CtClass declaring) { - super(declaring, minfo); - cachedStringRep = null; - } - - /** - * Creates a public abstract method. The created method must be - * added to a class with CtClass.addMethod(). - * - * @param declaring the class to which the created method is added. - * @param returnType the type of the returned value - * @param mname the method name - * @param parameters a list of the parameter types - * - * @see CtClass#addMethod(CtMethod) - */ - public CtMethod(CtClass returnType, String mname, - CtClass[] parameters, CtClass declaring) { - this(null, declaring); - ConstPool cp = declaring.getClassFile2().getConstPool(); - String desc = Descriptor.ofMethod(returnType, parameters); - methodInfo = new MethodInfo(cp, mname, desc); - setModifiers(Modifier.PUBLIC | Modifier.ABSTRACT); - } - - /** - * Creates a copy of a CtMethod object. - * The created method must be - * added to a class with CtClass.addMethod(). - * - *

All occurrences of class names in the created method - * are replaced with names specified by - * map if map is not null. - * - *

For example, suppose that a method at() is as - * follows: - * - * 

-     * public X at(int i) {
-     *     return (X)super.elementAt(i);
-     * }
- * - *

(X is a class name.) If map substitutes - * String for X, then the created method is: - * - * 

-     * public String at(int i) {
-     *     return (String)super.elementAt(i);
-     * }
- * - *

By default, all the occurrences of the names of the class - * declaring at() and the superclass are replaced - * with the name of the class and the superclass that the - * created method is added to. - * This is done whichever map is null or not. - * To prevent this replacement, call ClassMap.fix() - * or put() to explicitly specify replacement. - * - *

Note: if the .class notation (for example, - * String.class) is included in an expression, the - * Javac compiler may produce a helper method. - * Since this constructor never - * copies this helper method, the programmers have the responsiblity of - * copying it. Otherwise, use Class.forName() in the - * expression. - * - * @param src the source method. - * @param declaring the class to which the created method is added. - * @param map the hashtable associating original class names - * with substituted names. - * It can be null. - * - * @see CtClass#addMethod(CtMethod) - * @see ClassMap#fix(String) - */ - public CtMethod(CtMethod src, CtClass declaring, ClassMap map) - throws CannotCompileException - { - this(null, declaring); - copy(src, false, map); - } - - /** - * Compiles the given source code and creates a method. - * This method simply delegates to make() in - * CtNewMethod. See it for more details. - * CtNewMethod has a number of useful factory methods. - * - * @param src the source text. - * @param declaring the class to which the created method is added. - * @see CtNewMethod#make(String, CtClass) - */ - public static CtMethod make(String src, CtClass declaring) - throws CannotCompileException - { - return CtNewMethod.make(src, declaring); - } - - /** - * Creates a method from a MethodInfo object. - * - * @param declaring the class declaring the method. - * @throws CannotCompileException if the the MethodInfo - * object and the declaring class have different - * ConstPool objects - * @since 3.6 - */ - public static CtMethod make(MethodInfo minfo, CtClass declaring) - throws CannotCompileException - { - if (declaring.getClassFile2().getConstPool() != minfo.getConstPool()) - throw new CannotCompileException("bad declaring class"); - - return new CtMethod(minfo, declaring); - } - - /** - * Returns a hash code value for the method. - * If two methods have the same name and signature, then - * the hash codes for the two methods are equal. - */ - public int hashCode() { - return getStringRep().hashCode(); - } - - /** - * This method is invoked when setName() or replaceClassName() - * in CtClass is called. - */ - void nameReplaced() { - cachedStringRep = null; - } - - /* This method is also called by CtClassType.getMethods0(). - */ - final String getStringRep() { - if (cachedStringRep == null) - cachedStringRep = methodInfo.getName() - + Descriptor.getParamDescriptor(methodInfo.getDescriptor()); - - return cachedStringRep; - } - - /** - * Indicates whether obj has the same name and the - * same signature as this method. - */ - public boolean equals(Object obj) { - return obj != null && obj instanceof CtMethod - && ((CtMethod)obj).getStringRep().equals(getStringRep()); - } - - /** - * Returns the method name followed by parameter types - * such as javassist.CtMethod.setBody(String). - * - * @since 3.5 - */ - public String getLongName() { - return getDeclaringClass().getName() + "." - + getName() + Descriptor.toString(getSignature()); - } - - /** - * Obtains the name of this method. - */ - public String getName() { - return methodInfo.getName(); - } - - /** - * Changes the name of this method. - */ - public void setName(String newname) { - declaringClass.checkModify(); - methodInfo.setName(newname); - } - - /** - * Obtains the type of the returned value. - */ - public CtClass getReturnType() throws NotFoundException { - return getReturnType0(); - } - - /** - * Returns true if the method body is empty, that is, {}. - * It also returns true if the method is an abstract method. - */ - public boolean isEmpty() { - CodeAttribute ca = getMethodInfo2().getCodeAttribute(); - if (ca == null) // abstract or native - return (getModifiers() & Modifier.ABSTRACT) != 0; - - CodeIterator it = ca.iterator(); - try { - return it.hasNext() && it.byteAt(it.next()) == Opcode.RETURN - && !it.hasNext(); - } - catch (BadBytecode e) {} - return false; - } - - /** - * Copies a method body from another method. - * If this method is abstract, the abstract modifier is removed - * after the method body is copied. - * - *

All occurrences of the class names in the copied method body - * are replaced with the names specified by - * map if map is not null. - * - * @param src the method that the body is copied from. - * @param map the hashtable associating original class names - * with substituted names. - * It can be null. - */ - public void setBody(CtMethod src, ClassMap map) - throws CannotCompileException - { - setBody0(src.declaringClass, src.methodInfo, - declaringClass, methodInfo, map); - } - - /** - * Replace a method body with a new method body wrapping the - * given method. - * - * @param mbody the wrapped method - * @param constParam the constant parameter given to - * the wrapped method - * (maybe null). - * - * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) - */ - public void setWrappedBody(CtMethod mbody, ConstParameter constParam) - throws CannotCompileException - { - declaringClass.checkModify(); - - CtClass clazz = getDeclaringClass(); - CtClass[] params; - CtClass retType; - try { - params = getParameterTypes(); - retType = getReturnType(); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - Bytecode code = CtNewWrappedMethod.makeBody(clazz, - clazz.getClassFile2(), - mbody, - params, retType, - constParam); - CodeAttribute cattr = code.toCodeAttribute(); - methodInfo.setCodeAttribute(cattr); - methodInfo.setAccessFlags(methodInfo.getAccessFlags() - & ~AccessFlag.ABSTRACT); - // rebuilding a stack map table is not needed. - } - - // inner classes - - /** - * Instances of this class represent a constant parameter. - * They are used to specify the parameter given to the methods - * created by CtNewMethod.wrapped(). - * - * @see CtMethod#setWrappedBody(CtMethod,CtMethod.ConstParameter) - * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) - * @see CtNewConstructor#make(CtClass[],CtClass[],int,CtMethod,CtMethod.ConstParameter,CtClass) - */ - public static class ConstParameter { - /** - * Makes an integer constant. - * - * @param i the constant value. - */ - public static ConstParameter integer(int i) { - return new IntConstParameter(i); - } - - /** - * Makes a long integer constant. - * - * @param i the constant value. - */ - public static ConstParameter integer(long i) { - return new LongConstParameter(i); - } - - /** - * Makes an String constant. - * - * @param s the constant value. - */ - public static ConstParameter string(String s) { - return new StringConstParameter(s); - } - - ConstParameter() {} - - /** - * @return the size of the stack consumption. - */ - int compile(Bytecode code) throws CannotCompileException { - return 0; - } - - String descriptor() { - return defaultDescriptor(); - } - - /** - * @see CtNewWrappedMethod - */ - static String defaultDescriptor() { - return "([Ljava/lang/Object;)Ljava/lang/Object;"; - } - - /** - * Returns the descriptor for constructors. - * - * @see CtNewWrappedConstructor - */ - String constDescriptor() { - return defaultConstDescriptor(); - } - - /** - * Returns the default descriptor for constructors. - */ - static String defaultConstDescriptor() { - return "([Ljava/lang/Object;)V"; - } - } - - static class IntConstParameter extends ConstParameter { - int param; - - IntConstParameter(int i) { - param = i; - } - - int compile(Bytecode code) throws CannotCompileException { - code.addIconst(param); - return 1; - } - - String descriptor() { - return "([Ljava/lang/Object;I)Ljava/lang/Object;"; - } - - String constDescriptor() { - return "([Ljava/lang/Object;I)V"; - } - } - - static class LongConstParameter extends ConstParameter { - long param; - - LongConstParameter(long l) { - param = l; - } - - int compile(Bytecode code) throws CannotCompileException { - code.addLconst(param); - return 2; - } - - String descriptor() { - return "([Ljava/lang/Object;J)Ljava/lang/Object;"; - } - - String constDescriptor() { - return "([Ljava/lang/Object;J)V"; - } - } - - static class StringConstParameter extends ConstParameter { - String param; - - StringConstParameter(String s) { - param = s; - } - - int compile(Bytecode code) throws CannotCompileException { - code.addLdc(param); - return 1; - } - - String descriptor() { - return "([Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;"; - } - - String constDescriptor() { - return "([Ljava/lang/Object;Ljava/lang/String;)V"; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewClass.java b/src/com/wenshuo/agent/javassist/CtNewClass.java deleted file mode 100644 index 1db1989..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewClass.java +++ /dev/null @@ -1,126 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.DataOutputStream; -import java.io.IOException; -import com.wenshuo.agent.javassist.bytecode.ClassFile; - -class CtNewClass extends CtClassType { - /* true if the class is an interface. - */ - protected boolean hasConstructor; - - CtNewClass(String name, ClassPool cp, - boolean isInterface, CtClass superclass) { - super(name, cp); - wasChanged = true; - String superName; - if (isInterface || superclass == null) - superName = null; - else - superName = superclass.getName(); - - classfile = new ClassFile(isInterface, name, superName); - if (isInterface && superclass != null) - classfile.setInterfaces(new String[] { superclass.getName() }); - - setModifiers(Modifier.setPublic(getModifiers())); - hasConstructor = isInterface; - } - - protected void extendToString(StringBuffer buffer) { - if (hasConstructor) - buffer.append("hasConstructor "); - - super.extendToString(buffer); - } - - public void addConstructor(CtConstructor c) - throws CannotCompileException - { - hasConstructor = true; - super.addConstructor(c); - } - - public void toBytecode(DataOutputStream out) - throws CannotCompileException, IOException - { - if (!hasConstructor) - try { - inheritAllConstructors(); - hasConstructor = true; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - super.toBytecode(out); - } - - /** - * Adds constructors inhrited from the super class. - * - *

After this method is called, the class inherits all the - * constructors from the super class. The added constructor - * calls the super's constructor with the same signature. - */ - public void inheritAllConstructors() - throws CannotCompileException, NotFoundException - { - CtClass superclazz; - CtConstructor[] cs; - - superclazz = getSuperclass(); - cs = superclazz.getDeclaredConstructors(); - - int n = 0; - for (int i = 0; i < cs.length; ++i) { - CtConstructor c = cs[i]; - int mod = c.getModifiers(); - if (isInheritable(mod, superclazz)) { - CtConstructor cons - = CtNewConstructor.make(c.getParameterTypes(), - c.getExceptionTypes(), this); - cons.setModifiers(mod & (Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE)); - addConstructor(cons); - ++n; - } - } - - if (n < 1) - throw new CannotCompileException( - "no inheritable constructor in " + superclazz.getName()); - - } - - private boolean isInheritable(int mod, CtClass superclazz) { - if (Modifier.isPrivate(mod)) - return false; - - if (Modifier.isPackage(mod)) { - String pname = getPackageName(); - String pname2 = superclazz.getPackageName(); - if (pname == null) - return pname2 == null; - else - return pname.equals(pname2); - } - - return true; - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewConstructor.java b/src/com/wenshuo/agent/javassist/CtNewConstructor.java deleted file mode 100644 index 18c929d..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewConstructor.java +++ /dev/null @@ -1,319 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; - -/** - * A collection of static methods for creating a CtConstructor. - * An instance of this class does not make any sense. - * - *

A class initializer (static constructor) cannot be created by the - * methods in this class. Call makeClassInitializer() in - * CtClass and append code snippet to the body of the class - * initializer obtained by makeClassInitializer(). - * - * @see CtClass#addConstructor(CtConstructor) - * @see CtClass#makeClassInitializer() - */ -public class CtNewConstructor { - /** - * Specifies that no parameters are passed to a super-class' - * constructor. That is, the default constructor is invoked. - */ - public static final int PASS_NONE = 0; // call super() - - /** - * Specifies that parameters are converted into an array of - * Object and passed to a super-class' - * constructor. - */ - public static final int PASS_ARRAY = 1; // an array of parameters - - /** - * Specifies that parameters are passed as is - * to a super-class' constructor. The signature of that - * constructor must be the same as that of the created constructor. - */ - public static final int PASS_PARAMS = 2; - - /** - * Compiles the given source code and creates a constructor. - * The source code must include not only the constructor body - * but the whole declaration. - * - * @param src the source text. - * @param declaring the class to which the created constructor is added. - */ - public static CtConstructor make(String src, CtClass declaring) - throws CannotCompileException - { - Javac compiler = new Javac(declaring); - try { - CtMember obj = compiler.compile(src); - if (obj instanceof CtConstructor) { - // a stack map table has been already created. - return (CtConstructor)obj; - } - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - - throw new CannotCompileException("not a constructor"); - } - - /** - * Creates a public constructor. - * - * @param parameters a list of the parameter types. - * @param exceptions a list of the exception types. - * @param body the source text of the constructor body. - * It must be a block surrounded by {}. - * If it is null, the substituted - * constructor body does nothing except calling - * super(). - * @param declaring the class to which the created method is added. - */ - public static CtConstructor make(CtClass[] parameters, - CtClass[] exceptions, - String body, CtClass declaring) - throws CannotCompileException - { - try { - CtConstructor cc = new CtConstructor(parameters, declaring); - cc.setExceptionTypes(exceptions); - cc.setBody(body); - return cc; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - /** - * Creates a copy of a constructor. - * This is a convenience method for calling - * {@link CtConstructor#CtConstructor(CtConstructor, CtClass, ClassMap) this constructor}. - * See the description of the constructor for particular behavior of the copying. - * - * @param c the copied constructor. - * @param declaring the class to which the created method is added. - * @param map the hash table associating original class names - * with substituted names. - * It can be null. - * - * @see CtConstructor#CtConstructor(CtConstructor,CtClass,ClassMap) - */ - public static CtConstructor copy(CtConstructor c, CtClass declaring, - ClassMap map) throws CannotCompileException { - return new CtConstructor(c, declaring, map); - } - - /** - * Creates a default (public) constructor. - * - *

The created constructor takes no parameter. It calls - * super(). - */ - public static CtConstructor defaultConstructor(CtClass declaring) - throws CannotCompileException - { - CtConstructor cons = new CtConstructor((CtClass[])null, declaring); - - ConstPool cp = declaring.getClassFile2().getConstPool(); - Bytecode code = new Bytecode(cp, 1, 1); - code.addAload(0); - try { - code.addInvokespecial(declaring.getSuperclass(), - "", "()V"); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - code.add(Bytecode.RETURN); - - // no need to construct a stack map table. - cons.getMethodInfo2().setCodeAttribute(code.toCodeAttribute()); - return cons; - } - - /** - * Creates a public constructor that only calls a constructor - * in the super class. The created constructor receives parameters - * specified by parameters but calls the super's - * constructor without those parameters (that is, it calls the default - * constructor). - * - *

The parameters passed to the created constructor should be - * used for field initialization. CtField.Initializer - * objects implicitly insert initialization code in constructor - * bodies. - * - * @param parameters parameter types - * @param exceptions exception types - * @param declaring the class to which the created constructor - * is added. - * @see CtField.Initializer#byParameter(int) - */ - public static CtConstructor skeleton(CtClass[] parameters, - CtClass[] exceptions, CtClass declaring) - throws CannotCompileException - { - return make(parameters, exceptions, PASS_NONE, - null, null, declaring); - } - - /** - * Creates a public constructor that only calls a constructor - * in the super class. The created constructor receives parameters - * specified by parameters and calls the super's - * constructor with those parameters. - * - * @param parameters parameter types - * @param exceptions exception types - * @param declaring the class to which the created constructor - * is added. - */ - public static CtConstructor make(CtClass[] parameters, - CtClass[] exceptions, CtClass declaring) - throws CannotCompileException - { - return make(parameters, exceptions, PASS_PARAMS, - null, null, declaring); - } - - /** - * Creates a public constructor. - * - *

If howto is PASS_PARAMS, - * the created constructor calls the super's constructor with the - * same signature. The superclass must contain - * a constructor taking the same set of parameters as the created one. - * - *

If howto is PASS_NONE, - * the created constructor calls the super's default constructor. - * The superclass must contain a constructor taking no parameters. - * - *

If howto is PASS_ARRAY, - * the created constructor calls the super's constructor - * with the given parameters in the form of an array of - * Object. The signature of the super's constructor - * must be: - * - * 

constructor(Object[] params, <type> cvalue)
-     *
- * - *

Here, cvalue is the constant value specified - * by cparam. - * - *

If cparam is null, the signature - * must be: - * - * 

constructor(Object[] params)
- * - *

If body is not null, a copy of that method is - * embedded in the body of the created constructor. - * The embedded method is executed after - * the super's constructor is called and the values of fields are - * initialized. Note that body must not - * be a constructor but a method. - * - *

Since the embedded method is wrapped - * in parameter-conversion code - * as in CtNewMethod.wrapped(), - * the constructor parameters are - * passed in the form of an array of Object. - * The method specified by body must have the - * signature shown below: - * - * 

Object method(Object[] params, <type> cvalue)
- * - *

If cparam is null, the signature - * must be: - * - * 

Object method(Object[] params)
- * - *

Although the type of the returned value is Object, - * the value must be always null. - * - *

Example: - * - * 

-     * ClassPool pool = ... ;
-     * CtClass xclass = pool.makeClass("X");
-     * CtMethod method = pool.getMethod("Sample", "m");
-     * xclass.setSuperclass(pool.get("Y"));
-     * CtClass[] argTypes = { CtClass.intType };
-     * ConstParameter cparam = ConstParameter.string("test");
-     * CtConstructor c = CtNewConstructor.make(argTypes, null,
-     *                                  PASS_PARAMS, method, cparam, xclass);
-     * xclass.addConstructor(c);
- * - *

where the class Sample is as follows: - * - * 

-     * public class Sample {
-     *     public Object m(Object[] args, String msg) {
-     *         System.out.println(msg);
-     *         return null;
-     *     }
-     * }
- * - *

This program produces the following class: - * - * 

-     * public class X extends Y {
-     *     public X(int p0) {
-     *         super(p0);
-     *         String msg = "test";
-     *         Object[] args = new Object[] { p0 };
-     *         // begin of copied body
-     *         System.out.println(msg);
-     *         Object result = null;
-     *         // end
-     *     }
-     * }
- * - * @param parameters a list of the parameter types - * @param exceptions a list of the exceptions - * @param howto how to pass parameters to the super-class' - * constructor (PASS_NONE, - * PASS_ARRAY, - * or PASS_PARAMS) - * @param body appended body (may be null). - * It must be not a constructor but a method. - * @param cparam constant parameter (may be null.) - * @param declaring the class to which the created constructor - * is added. - * - * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) - */ - public static CtConstructor make(CtClass[] parameters, - CtClass[] exceptions, int howto, - CtMethod body, ConstParameter cparam, - CtClass declaring) - throws CannotCompileException - { - return CtNewWrappedConstructor.wrapped(parameters, exceptions, - howto, body, cparam, declaring); - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewMethod.java b/src/com/wenshuo/agent/javassist/CtNewMethod.java deleted file mode 100644 index d55a464..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewMethod.java +++ /dev/null @@ -1,478 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.Javac; -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; - -/** - * A collection of static methods for creating a CtMethod. - * An instance of this class does not make any sense. - * - * @see CtClass#addMethod(CtMethod) - */ -public class CtNewMethod { - - /** - * Compiles the given source code and creates a method. - * The source code must include not only the method body - * but the whole declaration, for example, - * - * 
"public Object id(Object obj) { return obj; }"
- * - * @param src the source text. - * @param declaring the class to which the created method is added. - */ - public static CtMethod make(String src, CtClass declaring) - throws CannotCompileException - { - return make(src, declaring, null, null); - } - - /** - * Compiles the given source code and creates a method. - * The source code must include not only the method body - * but the whole declaration, for example, - * - * 
"public Object id(Object obj) { return obj; }"
- * - *

If the source code includes $proceed(), then - * it is compiled into a method call on the specified object. - * - * @param src the source text. - * @param declaring the class to which the created method is added. - * @param delegateObj the source text specifying the object - * that is called on by $proceed(). - * @param delegateMethod the name of the method - * that is called by $proceed(). - */ - public static CtMethod make(String src, CtClass declaring, - String delegateObj, String delegateMethod) - throws CannotCompileException - { - Javac compiler = new Javac(declaring); - try { - if (delegateMethod != null) - compiler.recordProceed(delegateObj, delegateMethod); - - CtMember obj = compiler.compile(src); - if (obj instanceof CtMethod) - return (CtMethod)obj; - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - - throw new CannotCompileException("not a method"); - } - - /** - * Creates a public (non-static) method. The created method cannot - * be changed to a static method later. - * - * @param returnType the type of the returned value. - * @param mname the method name. - * @param parameters a list of the parameter types. - * @param exceptions a list of the exception types. - * @param body the source text of the method body. - * It must be a block surrounded by {}. - * If it is null, the created method - * does nothing except returning zero or null. - * @param declaring the class to which the created method is added. - * @see #make(int, CtClass, String, CtClass[], CtClass[], String, CtClass) - */ - public static CtMethod make(CtClass returnType, - String mname, CtClass[] parameters, - CtClass[] exceptions, - String body, CtClass declaring) - throws CannotCompileException - { - return make(Modifier.PUBLIC, returnType, mname, parameters, exceptions, - body, declaring); - } - - /** - * Creates a method. modifiers can contain - * Modifier.STATIC. - * - * @param modifiers access modifiers. - * @param returnType the type of the returned value. - * @param mname the method name. - * @param parameters a list of the parameter types. - * @param exceptions a list of the exception types. - * @param body the source text of the method body. - * It must be a block surrounded by {}. - * If it is null, the created method - * does nothing except returning zero or null. - * @param declaring the class to which the created method is added. - * - * @see Modifier - */ - public static CtMethod make(int modifiers, CtClass returnType, - String mname, CtClass[] parameters, - CtClass[] exceptions, - String body, CtClass declaring) - throws CannotCompileException - { - try { - CtMethod cm - = new CtMethod(returnType, mname, parameters, declaring); - cm.setModifiers(modifiers); - cm.setExceptionTypes(exceptions); - cm.setBody(body); - return cm; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - /** - * Creates a copy of a method. This method is provided for creating - * a new method based on an existing method. - * This is a convenience method for calling - * {@link CtMethod#CtMethod(CtMethod, CtClass, ClassMap) this constructor}. - * See the description of the constructor for particular behavior of the copying. - * - * @param src the source method. - * @param declaring the class to which the created method is added. - * @param map the hash table associating original class names - * with substituted names. - * It can be null. - * - * @see CtMethod#CtMethod(CtMethod,CtClass,ClassMap) - */ - public static CtMethod copy(CtMethod src, CtClass declaring, - ClassMap map) throws CannotCompileException { - return new CtMethod(src, declaring, map); - } - - /** - * Creates a copy of a method with a new name. - * This method is provided for creating - * a new method based on an existing method. - * This is a convenience method for calling - * {@link CtMethod#CtMethod(CtMethod, CtClass, ClassMap) this constructor}. - * See the description of the constructor for particular behavior of the copying. - * - * @param src the source method. - * @param name the name of the created method. - * @param declaring the class to which the created method is added. - * @param map the hash table associating original class names - * with substituted names. - * It can be null. - * - * @see CtMethod#CtMethod(CtMethod,CtClass,ClassMap) - */ - public static CtMethod copy(CtMethod src, String name, CtClass declaring, - ClassMap map) throws CannotCompileException { - CtMethod cm = new CtMethod(src, declaring, map); - cm.setName(name); - return cm; - } - - /** - * Creates a public abstract method. - * - * @param returnType the type of the returned value - * @param mname the method name - * @param parameters a list of the parameter types - * @param exceptions a list of the exception types - * @param declaring the class to which the created method is added. - * - * @see CtMethod#CtMethod(CtClass,String,CtClass[],CtClass) - */ - public static CtMethod abstractMethod(CtClass returnType, - String mname, - CtClass[] parameters, - CtClass[] exceptions, - CtClass declaring) - throws NotFoundException - { - CtMethod cm = new CtMethod(returnType, mname, parameters, declaring); - cm.setExceptionTypes(exceptions); - return cm; - } - - /** - * Creates a public getter method. The getter method returns the value - * of the specified field in the class to which this method is added. - * The created method is initially not static even if the field is - * static. Change the modifiers if the method should be static. - * - * @param methodName the name of the getter - * @param field the field accessed. - */ - public static CtMethod getter(String methodName, CtField field) - throws CannotCompileException - { - FieldInfo finfo = field.getFieldInfo2(); - String fieldType = finfo.getDescriptor(); - String desc = "()" + fieldType; - ConstPool cp = finfo.getConstPool(); - MethodInfo minfo = new MethodInfo(cp, methodName, desc); - minfo.setAccessFlags(AccessFlag.PUBLIC); - - Bytecode code = new Bytecode(cp, 2, 1); - try { - String fieldName = finfo.getName(); - if ((finfo.getAccessFlags() & AccessFlag.STATIC) == 0) { - code.addAload(0); - code.addGetfield(Bytecode.THIS, fieldName, fieldType); - } - else - code.addGetstatic(Bytecode.THIS, fieldName, fieldType); - - code.addReturn(field.getType()); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - minfo.setCodeAttribute(code.toCodeAttribute()); - CtClass cc = field.getDeclaringClass(); - // a stack map is not needed. - return new CtMethod(minfo, cc); - } - - /** - * Creates a public setter method. The setter method assigns the - * value of the first parameter to the specified field - * in the class to which this method is added. - * The created method is not static even if the field is - * static. You may not change it to be static - * by setModifiers() in CtBehavior. - * - * @param methodName the name of the setter - * @param field the field accessed. - */ - public static CtMethod setter(String methodName, CtField field) - throws CannotCompileException - { - FieldInfo finfo = field.getFieldInfo2(); - String fieldType = finfo.getDescriptor(); - String desc = "(" + fieldType + ")V"; - ConstPool cp = finfo.getConstPool(); - MethodInfo minfo = new MethodInfo(cp, methodName, desc); - minfo.setAccessFlags(AccessFlag.PUBLIC); - - Bytecode code = new Bytecode(cp, 3, 3); - try { - String fieldName = finfo.getName(); - if ((finfo.getAccessFlags() & AccessFlag.STATIC) == 0) { - code.addAload(0); - code.addLoad(1, field.getType()); - code.addPutfield(Bytecode.THIS, fieldName, fieldType); - } - else { - code.addLoad(1, field.getType()); - code.addPutstatic(Bytecode.THIS, fieldName, fieldType); - } - - code.addReturn(null); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - minfo.setCodeAttribute(code.toCodeAttribute()); - CtClass cc = field.getDeclaringClass(); - // a stack map is not needed. - return new CtMethod(minfo, cc); - } - - /** - * Creates a method forwarding to a delegate in - * a super class. The created method calls a method specified - * by delegate with all the parameters passed to the - * created method. If the delegate method returns a value, - * the created method returns that value to the caller. - * The delegate method must be declared in a super class. - * - *

The following method is an example of the created method. - * - * 

-     * int f(int p, int q) {
-     *     return super.f(p, q);
-     * }
- * - *

The name of the created method can be changed by - * setName(). - * - * @param delegate the method that the created method forwards to. - * @param declaring the class to which the created method is - * added. - */ - public static CtMethod delegator(CtMethod delegate, CtClass declaring) - throws CannotCompileException - { - try { - return delegator0(delegate, declaring); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - private static CtMethod delegator0(CtMethod delegate, CtClass declaring) - throws CannotCompileException, NotFoundException - { - MethodInfo deleInfo = delegate.getMethodInfo2(); - String methodName = deleInfo.getName(); - String desc = deleInfo.getDescriptor(); - ConstPool cp = declaring.getClassFile2().getConstPool(); - MethodInfo minfo = new MethodInfo(cp, methodName, desc); - minfo.setAccessFlags(deleInfo.getAccessFlags()); - - ExceptionsAttribute eattr = deleInfo.getExceptionsAttribute(); - if (eattr != null) - minfo.setExceptionsAttribute( - (ExceptionsAttribute)eattr.copy(cp, null)); - - Bytecode code = new Bytecode(cp, 0, 0); - boolean isStatic = Modifier.isStatic(delegate.getModifiers()); - CtClass deleClass = delegate.getDeclaringClass(); - CtClass[] params = delegate.getParameterTypes(); - int s; - if (isStatic) { - s = code.addLoadParameters(params, 0); - code.addInvokestatic(deleClass, methodName, desc); - } - else { - code.addLoad(0, deleClass); - s = code.addLoadParameters(params, 1); - code.addInvokespecial(deleClass, methodName, desc); - } - - code.addReturn(delegate.getReturnType()); - code.setMaxLocals(++s); - code.setMaxStack(s < 2 ? 2 : s); // for a 2-word return value - minfo.setCodeAttribute(code.toCodeAttribute()); - // a stack map is not needed. - return new CtMethod(minfo, declaring); - } - - /** - * Creates a wrapped method. The wrapped method receives parameters - * in the form of an array of Object. - * - *

The body of the created method is a copy of the body of the method - * specified by body. However, it is wrapped in - * parameter-conversion code. - * - *

The method specified by body must have this singature: - * - * 

Object method(Object[] params, <type> cvalue)
- * - *

The type of the cvalue depends on - * constParam. - * If constParam is null, the signature - * must be: - * - * 

Object method(Object[] params)
- * - *

The method body copied from body is wrapped in - * parameter-conversion code, which converts parameters specified by - * parameterTypes into an array of Object. - * The returned value is also converted from the Object - * type to the type specified by returnType. Thus, - * the resulting method body is as follows: - * - * 

-     * Object[] params = new Object[] { p0, p1, ... };
-     * <type> cvalue = <constant-value>;
-     *  ... copied method body ...
-     * Object result = <returned value>
-     * return (<returnType>)result;
-     *
- * - *

The variables p0, p2, ... represent - * formal parameters of the created method. - * The value of cvalue is specified by - * constParam. - * - *

If the type of a parameter or a returned value is a primitive - * type, then the value is converted into a wrapper object such as - * java.lang.Integer. If the type of the returned value - * is void, the returned value is discarded. - * - *

Example: - * - * 

-     * ClassPool pool = ... ;
-     * CtClass vec = pool.makeClass("intVector");
-     * vec.setSuperclass(pool.get("java.util.Vector"));
-     * CtMethod addMethod = pool.getMethod("Sample", "add0");
-     *
-     * CtClass[] argTypes = { CtClass.intType };
-     * CtMethod m = CtNewMethod.wrapped(CtClass.voidType, "add", argTypes,
-     *                                  null, addMethod, null, vec);
-     * vec.addMethod(m);
- * - *

where the class Sample is as follows: - * - * 

public class Sample extends java.util.Vector {
-     *     public Object add0(Object[] args) {
-     *         super.addElement(args[0]);
-     *         return null;
-     *     }
-     * }
- * - *

This program produces a class intVector: - * - * 

public class intVector extends java.util.Vector {
-     *     public void add(int p0) {
-     *         Object[] args = new Object[] { p0 };
-     *         // begin of the copied body
-     *         super.addElement(args[0]);
-     *         Object result = null;
-     *         // end
-     *     }
-     * }
- * - *

Note that the type of the parameter to add() depends - * only on the value of argTypes passed to - * CtNewMethod.wrapped(). Thus, it is easy to - * modify this program to produce a - * StringVector class, which is a vector containing - * only String objects, and other vector classes. - * - * @param returnType the type of the returned value. - * @param mname the method name. - * @param parameterTypes a list of the parameter types. - * @param exceptionTypes a list of the exception types. - * @param body the method body - * (must not be a static method). - * @param constParam the constant parameter - * (maybe null). - * @param declaring the class to which the created method is - * added. - */ - public static CtMethod wrapped(CtClass returnType, - String mname, - CtClass[] parameterTypes, - CtClass[] exceptionTypes, - CtMethod body, ConstParameter constParam, - CtClass declaring) - throws CannotCompileException - { - return CtNewWrappedMethod.wrapped(returnType, mname, parameterTypes, - exceptionTypes, body, constParam, declaring); - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewNestedClass.java b/src/com/wenshuo/agent/javassist/CtNewNestedClass.java deleted file mode 100644 index 4fb89b0..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewNestedClass.java +++ /dev/null @@ -1,67 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.AccessFlag; -import com.wenshuo.agent.javassist.bytecode.InnerClassesAttribute; - -/** - * A newly created public nested class. - */ -class CtNewNestedClass extends CtNewClass { - CtNewNestedClass(String realName, ClassPool cp, boolean isInterface, - CtClass superclass) { - super(realName, cp, isInterface, superclass); - } - - /** - * This method does not change the STATIC bit. The original value is kept. - */ - public void setModifiers(int mod) { - mod = mod & ~Modifier.STATIC; - super.setModifiers(mod); - updateInnerEntry(mod, getName(), this, true); - } - - private static void updateInnerEntry(int mod, String name, CtClass clazz, boolean outer) { - ClassFile cf = clazz.getClassFile2(); - InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( - InnerClassesAttribute.tag); - if (ica == null) - return; - - int n = ica.tableLength(); - for (int i = 0; i < n; i++) - if (name.equals(ica.innerClass(i))) { - int acc = ica.accessFlags(i) & AccessFlag.STATIC; - ica.setAccessFlags(i, mod | acc); - String outName = ica.outerClass(i); - if (outName != null && outer) - try { - CtClass parent = clazz.getClassPool().get(outName); - updateInnerEntry(mod, name, parent, false); - } - catch (NotFoundException e) { - throw new RuntimeException("cannot find the declaring class: " - + outName); - } - - break; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java b/src/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java deleted file mode 100644 index d507162..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; - -class CtNewWrappedConstructor extends CtNewWrappedMethod { - private static final int PASS_NONE = CtNewConstructor.PASS_NONE; - // private static final int PASS_ARRAY = CtNewConstructor.PASS_ARRAY; - private static final int PASS_PARAMS = CtNewConstructor.PASS_PARAMS; - - public static CtConstructor wrapped(CtClass[] parameterTypes, - CtClass[] exceptionTypes, - int howToCallSuper, - CtMethod body, - ConstParameter constParam, - CtClass declaring) - throws CannotCompileException - { - try { - CtConstructor cons = new CtConstructor(parameterTypes, declaring); - cons.setExceptionTypes(exceptionTypes); - Bytecode code = makeBody(declaring, declaring.getClassFile2(), - howToCallSuper, body, - parameterTypes, constParam); - cons.getMethodInfo2().setCodeAttribute(code.toCodeAttribute()); - // a stack map table is not needed. - return cons; - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - } - - protected static Bytecode makeBody(CtClass declaring, ClassFile classfile, - int howToCallSuper, - CtMethod wrappedBody, - CtClass[] parameters, - ConstParameter cparam) - throws CannotCompileException - { - int stacksize, stacksize2; - - int superclazz = classfile.getSuperclassId(); - Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0); - code.setMaxLocals(false, parameters, 0); - code.addAload(0); - if (howToCallSuper == PASS_NONE) { - stacksize = 1; - code.addInvokespecial(superclazz, "", "()V"); - } - else if (howToCallSuper == PASS_PARAMS) { - stacksize = code.addLoadParameters(parameters, 1) + 1; - code.addInvokespecial(superclazz, "", - Descriptor.ofConstructor(parameters)); - } - else { - stacksize = compileParameterList(code, parameters, 1); - String desc; - if (cparam == null) { - stacksize2 = 2; - desc = ConstParameter.defaultConstDescriptor(); - } - else { - stacksize2 = cparam.compile(code) + 2; - desc = cparam.constDescriptor(); - } - - if (stacksize < stacksize2) - stacksize = stacksize2; - - code.addInvokespecial(superclazz, "", desc); - } - - if (wrappedBody == null) - code.add(Bytecode.RETURN); - else { - stacksize2 = makeBody0(declaring, classfile, wrappedBody, - false, parameters, CtClass.voidType, - cparam, code); - if (stacksize < stacksize2) - stacksize = stacksize2; - } - - code.setMaxStack(stacksize); - return code; - } -} diff --git a/src/com/wenshuo/agent/javassist/CtNewWrappedMethod.java b/src/com/wenshuo/agent/javassist/CtNewWrappedMethod.java deleted file mode 100644 index da2ad8b..0000000 --- a/src/com/wenshuo/agent/javassist/CtNewWrappedMethod.java +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.JvstCodeGen; -import java.util.Hashtable; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; - -class CtNewWrappedMethod { - - private static final String addedWrappedMethod = "_added_m$"; - - public static CtMethod wrapped(CtClass returnType, String mname, - CtClass[] parameterTypes, - CtClass[] exceptionTypes, - CtMethod body, ConstParameter constParam, - CtClass declaring) - throws CannotCompileException - { - CtMethod mt = new CtMethod(returnType, mname, parameterTypes, - declaring); - mt.setModifiers(body.getModifiers()); - try { - mt.setExceptionTypes(exceptionTypes); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - Bytecode code = makeBody(declaring, declaring.getClassFile2(), body, - parameterTypes, returnType, constParam); - MethodInfo minfo = mt.getMethodInfo2(); - minfo.setCodeAttribute(code.toCodeAttribute()); - // a stack map has been already created. - return mt; - } - - static Bytecode makeBody(CtClass clazz, ClassFile classfile, - CtMethod wrappedBody, - CtClass[] parameters, - CtClass returnType, - ConstParameter cparam) - throws CannotCompileException - { - boolean isStatic = Modifier.isStatic(wrappedBody.getModifiers()); - Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0); - int stacksize = makeBody0(clazz, classfile, wrappedBody, isStatic, - parameters, returnType, cparam, code); - code.setMaxStack(stacksize); - code.setMaxLocals(isStatic, parameters, 0); - return code; - } - - /* The generated method body does not need a stack map table - * because it does not contain a branch instruction. - */ - protected static int makeBody0(CtClass clazz, ClassFile classfile, - CtMethod wrappedBody, - boolean isStatic, CtClass[] parameters, - CtClass returnType, ConstParameter cparam, - Bytecode code) - throws CannotCompileException - { - if (!(clazz instanceof CtClassType)) - throw new CannotCompileException("bad declaring class" - + clazz.getName()); - - if (!isStatic) - code.addAload(0); - - int stacksize = compileParameterList(code, parameters, - (isStatic ? 0 : 1)); - int stacksize2; - String desc; - if (cparam == null) { - stacksize2 = 0; - desc = ConstParameter.defaultDescriptor(); - } - else { - stacksize2 = cparam.compile(code); - desc = cparam.descriptor(); - } - - checkSignature(wrappedBody, desc); - - String bodyname; - try { - bodyname = addBodyMethod((CtClassType)clazz, classfile, - wrappedBody); - /* if an exception is thrown below, the method added above - * should be removed. (future work :<) - */ - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - - if (isStatic) - code.addInvokestatic(Bytecode.THIS, bodyname, desc); - else - code.addInvokespecial(Bytecode.THIS, bodyname, desc); - - compileReturn(code, returnType); // consumes 2 stack entries - - if (stacksize < stacksize2 + 2) - stacksize = stacksize2 + 2; - - return stacksize; - } - - private static void checkSignature(CtMethod wrappedBody, - String descriptor) - throws CannotCompileException - { - if (!descriptor.equals(wrappedBody.getMethodInfo2().getDescriptor())) - throw new CannotCompileException( - "wrapped method with a bad signature: " - + wrappedBody.getDeclaringClass().getName() - + '.' + wrappedBody.getName()); - } - - private static String addBodyMethod(CtClassType clazz, - ClassFile classfile, - CtMethod src) - throws BadBytecode, CannotCompileException - { - Hashtable bodies = clazz.getHiddenMethods(); - String bodyname = (String)bodies.get(src); - if (bodyname == null) { - do { - bodyname = addedWrappedMethod + clazz.getUniqueNumber(); - } while (classfile.getMethod(bodyname) != null); - ClassMap map = new ClassMap(); - map.put(src.getDeclaringClass().getName(), clazz.getName()); - MethodInfo body = new MethodInfo(classfile.getConstPool(), - bodyname, src.getMethodInfo2(), - map); - int acc = body.getAccessFlags(); - body.setAccessFlags(AccessFlag.setPrivate(acc)); - body.addAttribute(new SyntheticAttribute(classfile.getConstPool())); - // a stack map is copied. rebuilding it is not needed. - classfile.addMethod(body); - bodies.put(src, bodyname); - CtMember.Cache cache = clazz.hasMemberCache(); - if (cache != null) - cache.addMethod(new CtMethod(body, clazz)); - } - - return bodyname; - } - - /* compileParameterList() returns the stack size used - * by the produced code. - * - * @param regno the index of the local variable in which - * the first argument is received. - * (0: static method, 1: regular method.) - */ - static int compileParameterList(Bytecode code, - CtClass[] params, int regno) { - return JvstCodeGen.compileParameterList(code, params, regno); - } - - /* - * The produced codes cosume 1 or 2 stack entries. - */ - private static void compileReturn(Bytecode code, CtClass type) { - if (type.isPrimitive()) { - CtPrimitiveType pt = (CtPrimitiveType)type; - if (pt != CtClass.voidType) { - String wrapper = pt.getWrapperName(); - code.addCheckcast(wrapper); - code.addInvokevirtual(wrapper, pt.getGetMethodName(), - pt.getGetMethodDescriptor()); - } - - code.addOpcode(pt.getReturnOp()); - } - else { - code.addCheckcast(type); - code.addOpcode(Bytecode.ARETURN); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/CtPrimitiveType.java b/src/com/wenshuo/agent/javassist/CtPrimitiveType.java deleted file mode 100644 index bdd961b..0000000 --- a/src/com/wenshuo/agent/javassist/CtPrimitiveType.java +++ /dev/null @@ -1,112 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -/** - * An instance of CtPrimitiveType represents a primitive type. - * It is obtained from CtClass. - */ -public final class CtPrimitiveType extends CtClass { - private char descriptor; - private String wrapperName; - private String getMethodName; - private String mDescriptor; - private int returnOp; - private int arrayType; - private int dataSize; - - CtPrimitiveType(String name, char desc, String wrapper, - String methodName, String mDesc, int opcode, int atype, - int size) { - super(name); - descriptor = desc; - wrapperName = wrapper; - getMethodName = methodName; - mDescriptor = mDesc; - returnOp = opcode; - arrayType = atype; - dataSize = size; - } - - /** - * Returns true if this object represents a primitive - * Java type: boolean, byte, char, short, int, long, float, double, - * or void. - */ - public boolean isPrimitive() { return true; } - - /** - * Returns the modifiers for this type. - * For decoding, use javassist.Modifier. - * - * @see Modifier - */ - public int getModifiers() { - return Modifier.PUBLIC | Modifier.FINAL; - } - - /** - * Returns the descriptor representing this type. - * For example, if the type is int, then the descriptor is I. - */ - public char getDescriptor() { return descriptor; } - - /** - * Returns the name of the wrapper class. - * For example, if the type is int, then the wrapper class is - * java.lang.Integer. - */ - public String getWrapperName() { return wrapperName; } - - /** - * Returns the name of the method for retrieving the value - * from the wrapper object. - * For example, if the type is int, then the method name is - * intValue. - */ - public String getGetMethodName() { return getMethodName; } - - /** - * Returns the descriptor of the method for retrieving the value - * from the wrapper object. - * For example, if the type is int, then the method descriptor is - * ()I. - */ - public String getGetMethodDescriptor() { return mDescriptor; } - - /** - * Returns the opcode for returning a value of the type. - * For example, if the type is int, then the returned opcode is - * javassit.bytecode.Opcode.IRETURN. - */ - public int getReturnOp() { return returnOp; } - - /** - * Returns the array-type code representing the type. - * It is used for the newarray instruction. - * For example, if the type is int, then this method returns - * javassit.bytecode.Opcode.T_INT. - */ - public int getArrayType() { return arrayType; } - - /** - * Returns the data size of the primitive type. - * If the type is long or double, this method returns 2. - * Otherwise, it returns 1. - */ - public int getDataSize() { return dataSize; } -} diff --git a/src/com/wenshuo/agent/javassist/Loader.java b/src/com/wenshuo/agent/javassist/Loader.java deleted file mode 100644 index 2c2e52f..0000000 --- a/src/com/wenshuo/agent/javassist/Loader.java +++ /dev/null @@ -1,430 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.*; -import java.util.Hashtable; -import java.util.Vector; -import java.security.ProtectionDomain; - -/** - * The class loader for Javassist. - * - *

This is a sample class loader using ClassPool. - * Unlike a regular class loader, this class loader obtains bytecode - * from a ClassPool. - * - *

Note that Javassist can be used without this class loader; programmers - * can define their own versions of class loader. They can run - * a program even without any user-defined class loader if that program - * is statically translated with Javassist. - * This class loader is just provided as a utility class. - * - *

Suppose that an instance of MyTranslator implementing - * the interface Translator is responsible for modifying - * class files. - * The startup program of an application using MyTranslator - * should be something like this: - * - * 

- * import com.wenshuo.agent.javassist.*;
- *
- * public class Main {
- *   public static void main(String[] args) throws Throwable {
- *     MyTranslator myTrans = new MyTranslator();
- *     ClassPool cp = ClassPool.getDefault();
- *     Loader cl = new Loader(cp);
- *     cl.addTranslator(cp, myTrans);
- *     cl.run("MyApp", args);
- *   }
- * }
- *
- * - *

Class MyApp is the main program of the application. - * - *

This program should be executed as follows: - * - * 

- * % java Main arg1 arg2...
- *
- * - *

It modifies the class MyApp with a MyTranslator - * object before the JVM loads it. - * Then it calls main() in MyApp with arguments - * arg1, arg2, ... - * - *

This program execution is equivalent to: - * - * 

- * % java MyApp arg1 arg2...
- *
- * - *

except that classes are translated by MyTranslator - * at load time. - * - *

If only a particular class must be modified when it is loaded, - * the startup program can be simpler; MyTranslator is - * unnecessary. For example, if only a class test.Rectangle - * is modified, the main() method above will be the following: - * - * 

- * ClassPool cp = ClassPool.getDefault();
- * Loader cl = new Loader(cp);
- * CtClass ct = cp.get("test.Rectangle");
- * ct.setSuperclass(cp.get("test.Point"));
- * cl.run("MyApp", args);
- * - *

This program changes the super class of the test.Rectangle - * class. - * - *

Note 1: - * - *

This class loader does not allow the users to intercept the loading - * of java.* and javax.* classes (and - * sun.*, org.xml.*, ...) unless - * Loader.doDelegation is false. This is because - * the JVM prohibits a user class loader from loading a system class. - * Also see Note 2. - * If this behavior is not appropriate, a subclass of Loader - * must be defined and loadClassByDelegation() must be overridden. - * - *

Note 2: - * - *

If classes are loaded with different class loaders, they belong to - * separate name spaces. If class C is loaded by a class - * loader CL, all classes that the class C - * refers to are also loaded by CL. However, if CL - * delegates the loading of the class C to CL', - * then those classes that the class C refers to - * are loaded by a parent class loader CL' - * instead of CL. - * - *

If an object of class C is assigned - * to a variable of class C belonging to a different name - * space, then a ClassCastException is thrown. - * - *

Because of the fact above, this loader delegates only the loading of - * javassist.Loader - * and classes included in package java.* and - * javax.* to the parent class - * loader. Other classes are directly loaded by this loader. - * - *

For example, suppose that java.lang.String would be loaded - * by this loader while java.io.File is loaded by the parent - * class loader. If the constructor of java.io.File is called - * with an instance of java.lang.String, then it may throw - * an exception since it accepts an instance of only the - * java.lang.String loaded by the parent class loader. - * - * @see javassist.ClassPool - * @see javassist.Translator - */ -public class Loader extends ClassLoader { - private Hashtable notDefinedHere; // must be atomic. - private Vector notDefinedPackages; // must be atomic. - private ClassPool source; - private Translator translator; - private ProtectionDomain domain; - - /** - * Specifies the algorithm of class loading. - * - *

This class loader uses the parent class loader for - * java.* and javax.* classes. - * If this variable doDelegation - * is false, this class loader does not delegate those - * classes to the parent class loader. - * - *

The default value is true. - */ - public boolean doDelegation = true; - - /** - * Creates a new class loader. - */ - public Loader() { - this(null); - } - - /** - * Creates a new class loader. - * - * @param cp the source of class files. - */ - public Loader(ClassPool cp) { - init(cp); - } - - /** - * Creates a new class loader - * using the specified parent class loader for delegation. - * - * @param parent the parent class loader. - * @param cp the source of class files. - */ - public Loader(ClassLoader parent, ClassPool cp) { - super(parent); - init(cp); - } - - private void init(ClassPool cp) { - notDefinedHere = new Hashtable(); - notDefinedPackages = new Vector(); - source = cp; - translator = null; - domain = null; - delegateLoadingOf("javassist.Loader"); - } - - /** - * Records a class so that the loading of that class is delegated - * to the parent class loader. - * - *

If the given class name ends with . (dot), then - * that name is interpreted as a package name. All the classes - * in that package and the sub packages are delegated. - */ - public void delegateLoadingOf(String classname) { - if (classname.endsWith(".")) - notDefinedPackages.addElement(classname); - else - notDefinedHere.put(classname, this); - } - - /** - * Sets the protection domain for the classes handled by this class - * loader. Without registering an appropriate protection domain, - * the program loaded by this loader will not work with a security - * manager or a signed jar file. - */ - public void setDomain(ProtectionDomain d) { - domain = d; - } - - /** - * Sets the soruce ClassPool. - */ - public void setClassPool(ClassPool cp) { - source = cp; - } - - /** - * Adds a translator, which is called whenever a class is loaded. - * - * @param cp the ClassPool object for obtaining - * a class file. - * @param t a translator. - * @throws NotFoundException if t.start() throws an exception. - * @throws CannotCompileException if t.start() throws an exception. - */ - public void addTranslator(ClassPool cp, Translator t) - throws NotFoundException, CannotCompileException { - source = cp; - translator = t; - t.start(cp); - } - - /** - * Loads a class with an instance of Loader - * and calls main() of that class. - * - *

This method calls run(). - * - * @param args command line parameters. - *
  {@code args[0]} is the class name to be loaded. - *
  {@code args[1..n]} are parameters passed - * to the target {@code main()}. - * - * @see javassist.Loader#run(String[]) - */ - public static void main(String[] args) throws Throwable { - Loader cl = new Loader(); - cl.run(args); - } - - /** - * Loads a class and calls main() in that class. - * - * @param args command line parameters. - * - *
  {@code args[0]} is the class name to be loaded. - *
  {@code args[1..n]} are parameters passed - * to the target {@code main()}. - */ - public void run(String[] args) throws Throwable { - int n = args.length - 1; - if (n >= 0) { - String[] args2 = new String[n]; - for (int i = 0; i < n; ++i) - args2[i] = args[i + 1]; - - run(args[0], args2); - } - } - - /** - * Loads a class and calls main() in that class. - * - * @param classname the loaded class. - * @param args parameters passed to main(). - */ - public void run(String classname, String[] args) throws Throwable { - Class c = loadClass(classname); - try { - c.getDeclaredMethod("main", new Class[] { String[].class }).invoke( - null, - new Object[] { args }); - } - catch (java.lang.reflect.InvocationTargetException e) { - throw e.getTargetException(); - } - } - - /** - * Requests the class loader to load a class. - */ - protected Class loadClass(String name, boolean resolve) - throws ClassFormatError, ClassNotFoundException { - name = name.intern(); - synchronized (name) { - Class c = findLoadedClass(name); - if (c == null) - c = loadClassByDelegation(name); - - if (c == null) - c = findClass(name); - - if (c == null) - c = delegateToParent(name); - - if (resolve) - resolveClass(c); - - return c; - } - } - - /** - * Finds the specified class using ClassPath. - * If the source throws an exception, this returns null. - * - *

This method can be overridden by a subclass of - * Loader. Note that the overridden method must not throw - * an exception when it just fails to find a class file. - * - * @return null if the specified class could not be found. - * @throws ClassNotFoundException if an exception is thrown while - * obtaining a class file. - */ - protected Class findClass(String name) throws ClassNotFoundException { - byte[] classfile; - try { - if (source != null) { - if (translator != null) - translator.onLoad(source, name); - - try { - classfile = source.get(name).toBytecode(); - } - catch (NotFoundException e) { - return null; - } - } - else { - String jarname = "/" + name.replace('.', '/') + ".class"; - InputStream in = this.getClass().getResourceAsStream(jarname); - if (in == null) - return null; - - classfile = ClassPoolTail.readStream(in); - } - } - catch (Exception e) { - throw new ClassNotFoundException( - "caught an exception while obtaining a class file for " - + name, e); - } - - int i = name.lastIndexOf('.'); - if (i != -1) { - String pname = name.substring(0, i); - if (getPackage(pname) == null) - try { - definePackage( - pname, null, null, null, null, null, null, null); - } - catch (IllegalArgumentException e) { - // ignore. maybe the package object for the same - // name has been created just right away. - } - } - - if (domain == null) - return defineClass(name, classfile, 0, classfile.length); - else - return defineClass(name, classfile, 0, classfile.length, domain); - } - - protected Class loadClassByDelegation(String name) - throws ClassNotFoundException - { - /* The swing components must be loaded by a system - * class loader. - * javax.swing.UIManager loads a (concrete) subclass - * of LookAndFeel by a system class loader and cast - * an instance of the class to LookAndFeel for - * (maybe) a security reason. To avoid failure of - * type conversion, LookAndFeel must not be loaded - * by this class loader. - */ - - Class c = null; - if (doDelegation) - if (name.startsWith("java.") - || name.startsWith("javax.") - || name.startsWith("sun.") - || name.startsWith("com.sun.") - || name.startsWith("org.w3c.") - || name.startsWith("org.xml.") - || notDelegated(name)) - c = delegateToParent(name); - - return c; - } - - private boolean notDelegated(String name) { - if (notDefinedHere.get(name) != null) - return true; - - int n = notDefinedPackages.size(); - for (int i = 0; i < n; ++i) - if (name.startsWith((String)notDefinedPackages.elementAt(i))) - return true; - - return false; - } - - protected Class delegateToParent(String classname) - throws ClassNotFoundException - { - ClassLoader cl = getParent(); - if (cl != null) - return cl.loadClass(classname); - else - return findSystemClass(classname); - } -} diff --git a/src/com/wenshuo/agent/javassist/LoaderClassPath.java b/src/com/wenshuo/agent/javassist/LoaderClassPath.java deleted file mode 100644 index e7c1029..0000000 --- a/src/com/wenshuo/agent/javassist/LoaderClassPath.java +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.InputStream; -import java.net.URL; -import java.lang.ref.WeakReference; - -/** - * A class search-path representing a class loader. - * - *

It is used for obtaining a class file from the given - * class loader by getResourceAsStream(). - * The LoaderClassPath refers to the class loader through - * WeakReference. If the class loader is garbage collected, - * the other search pathes are examined. - * - *

The given class loader must have both getResourceAsStream() - * and getResource(). - * - * @author Bill Burke - * @author Shigeru Chiba - * - * @see ClassPool#insertClassPath(ClassPath) - * @see ClassPool#appendClassPath(ClassPath) - * @see ClassClassPath - */ -public class LoaderClassPath implements ClassPath { - private WeakReference clref; - - /** - * Creates a search path representing a class loader. - */ - public LoaderClassPath(ClassLoader cl) { - clref = new WeakReference(cl); - } - - public String toString() { - Object cl = null; - if (clref != null) - cl = clref.get(); - - return cl == null ? "" : cl.toString(); - } - - /** - * Obtains a class file from the class loader. - * This method calls getResourceAsStream(String) - * on the class loader. - */ - public InputStream openClassfile(String classname) { - String cname = classname.replace('.', '/') + ".class"; - ClassLoader cl = (ClassLoader)clref.get(); - if (cl == null) - return null; // not found - else - return cl.getResourceAsStream(cname); - } - - /** - * Obtains the URL of the specified class file. - * This method calls getResource(String) - * on the class loader. - * - * @return null if the class file could not be found. - */ - public URL find(String classname) { - String cname = classname.replace('.', '/') + ".class"; - ClassLoader cl = (ClassLoader)clref.get(); - if (cl == null) - return null; // not found - else - return cl.getResource(cname); - } - - /** - * Closes this class path. - */ - public void close() { - clref = null; - } -} diff --git a/src/com/wenshuo/agent/javassist/Modifier.java b/src/com/wenshuo/agent/javassist/Modifier.java deleted file mode 100644 index 92f709c..0000000 --- a/src/com/wenshuo/agent/javassist/Modifier.java +++ /dev/null @@ -1,219 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import com.wenshuo.agent.javassist.bytecode.AccessFlag; - -/** - * The Modifier class provides static methods and constants to decode - * class and member access modifiers. The constant values are equivalent - * to the corresponding values in javassist.bytecode.AccessFlag. - * - *

All the methods/constants in this class are compatible with - * ones in java.lang.reflect.Modifier. - * - * @see CtClass#getModifiers() - */ -public class Modifier { - public static final int PUBLIC = AccessFlag.PUBLIC; - public static final int PRIVATE = AccessFlag.PRIVATE; - public static final int PROTECTED = AccessFlag.PROTECTED; - public static final int STATIC = AccessFlag.STATIC; - public static final int FINAL = AccessFlag.FINAL; - public static final int SYNCHRONIZED = AccessFlag.SYNCHRONIZED; - public static final int VOLATILE = AccessFlag.VOLATILE; - public static final int VARARGS = AccessFlag.VARARGS; - public static final int TRANSIENT = AccessFlag.TRANSIENT; - public static final int NATIVE = AccessFlag.NATIVE; - public static final int INTERFACE = AccessFlag.INTERFACE; - public static final int ABSTRACT = AccessFlag.ABSTRACT; - public static final int STRICT = AccessFlag.STRICT; - public static final int ANNOTATION = AccessFlag.ANNOTATION; - public static final int ENUM = AccessFlag.ENUM; - - /** - * Returns true if the modifiers include the public - * modifier. - */ - public static boolean isPublic(int mod) { - return (mod & PUBLIC) != 0; - } - - /** - * Returns true if the modifiers include the private - * modifier. - */ - public static boolean isPrivate(int mod) { - return (mod & PRIVATE) != 0; - } - - /** - * Returns true if the modifiers include the protected - * modifier. - */ - public static boolean isProtected(int mod) { - return (mod & PROTECTED) != 0; - } - - /** - * Returns true if the modifiers do not include either - * public, protected, or private. - */ - public static boolean isPackage(int mod) { - return (mod & (PUBLIC | PRIVATE | PROTECTED)) == 0; - } - - /** - * Returns true if the modifiers include the static - * modifier. - */ - public static boolean isStatic(int mod) { - return (mod & STATIC) != 0; - } - - /** - * Returns true if the modifiers include the final - * modifier. - */ - public static boolean isFinal(int mod) { - return (mod & FINAL) != 0; - } - - /** - * Returns true if the modifiers include the synchronized - * modifier. - */ - public static boolean isSynchronized(int mod) { - return (mod & SYNCHRONIZED) != 0; - } - - /** - * Returns true if the modifiers include the volatile - * modifier. - */ - public static boolean isVolatile(int mod) { - return (mod & VOLATILE) != 0; - } - - /** - * Returns true if the modifiers include the transient - * modifier. - */ - public static boolean isTransient(int mod) { - return (mod & TRANSIENT) != 0; - } - - /** - * Returns true if the modifiers include the native - * modifier. - */ - public static boolean isNative(int mod) { - return (mod & NATIVE) != 0; - } - - /** - * Returns true if the modifiers include the interface - * modifier. - */ - public static boolean isInterface(int mod) { - return (mod & INTERFACE) != 0; - } - - /** - * Returns true if the modifiers include the annotation - * modifier. - * - * @since 3.2 - */ - public static boolean isAnnotation(int mod) { - return (mod & ANNOTATION) != 0; - } - - /** - * Returns true if the modifiers include the enum - * modifier. - * - * @since 3.2 - */ - public static boolean isEnum(int mod) { - return (mod & ENUM) != 0; - } - - /** - * Returns true if the modifiers include the abstract - * modifier. - */ - public static boolean isAbstract(int mod) { - return (mod & ABSTRACT) != 0; - } - - /** - * Returns true if the modifiers include the strictfp - * modifier. - */ - public static boolean isStrict(int mod) { - return (mod & STRICT) != 0; - } - - /** - * Truns the public bit on. The protected and private bits are - * cleared. - */ - public static int setPublic(int mod) { - return (mod & ~(PRIVATE | PROTECTED)) | PUBLIC; - } - - /** - * Truns the protected bit on. The protected and public bits are - * cleared. - */ - public static int setProtected(int mod) { - return (mod & ~(PRIVATE | PUBLIC)) | PROTECTED; - } - - /** - * Truns the private bit on. The protected and private bits are - * cleared. - */ - public static int setPrivate(int mod) { - return (mod & ~(PROTECTED | PUBLIC)) | PRIVATE; - } - - /** - * Clears the public, protected, and private bits. - */ - public static int setPackage(int mod) { - return (mod & ~(PROTECTED | PUBLIC | PRIVATE)); - } - - /** - * Clears a specified bit in mod. - */ - public static int clear(int mod, int clearBit) { - return mod & ~clearBit; - } - - /** - * Return a string describing the access modifier flags in - * the specified modifier. - * - * @param mod modifier flags. - */ - public static String toString(int mod) { - return java.lang.reflect.Modifier.toString(mod); - } -} diff --git a/src/com/wenshuo/agent/javassist/NotFoundException.java b/src/com/wenshuo/agent/javassist/NotFoundException.java deleted file mode 100644 index 5569375..0000000 --- a/src/com/wenshuo/agent/javassist/NotFoundException.java +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -/** - * Signals that something could not be found. - */ -public class NotFoundException extends Exception { - public NotFoundException(String msg) { - super(msg); - } - - public NotFoundException(String msg, Exception e) { - super(msg + " because of " + e.toString()); - } -} diff --git a/src/com/wenshuo/agent/javassist/SerialVersionUID.java b/src/com/wenshuo/agent/javassist/SerialVersionUID.java deleted file mode 100644 index 37f9add..0000000 --- a/src/com/wenshuo/agent/javassist/SerialVersionUID.java +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.*; -import java.lang.reflect.Modifier; - -import com.wenshuo.agent.javassist.bytecode.*; -import java.util.*; -import java.security.*; - -/** - * Utility for calculating serialVersionUIDs for Serializable classes. - * - * @author Bob Lee (crazybob@crazybob.org) - * @author modified by Shigeru Chiba - */ -public class SerialVersionUID { - - /** - * Adds serialVersionUID if one does not already exist. Call this before - * modifying a class to maintain serialization compatability. - */ - public static void setSerialVersionUID(CtClass clazz) - throws CannotCompileException, NotFoundException - { - // check for pre-existing field. - try { - clazz.getDeclaredField("serialVersionUID"); - return; - } - catch (NotFoundException e) {} - - // check if the class is serializable. - if (!isSerializable(clazz)) - return; - - // add field with default value. - CtField field = new CtField(CtClass.longType, "serialVersionUID", - clazz); - field.setModifiers(Modifier.PRIVATE | Modifier.STATIC | - Modifier.FINAL); - clazz.addField(field, calculateDefault(clazz) + "L"); - } - - /** - * Does the class implement Serializable? - */ - private static boolean isSerializable(CtClass clazz) - throws NotFoundException - { - ClassPool pool = clazz.getClassPool(); - return clazz.subtypeOf(pool.get("java.io.Serializable")); - } - - /** - * Calculate default value. See Java Serialization Specification, Stream - * Unique Identifiers. - * - * @since 3.20 - */ - public static long calculateDefault(CtClass clazz) - throws CannotCompileException - { - try { - ByteArrayOutputStream bout = new ByteArrayOutputStream(); - DataOutputStream out = new DataOutputStream(bout); - ClassFile classFile = clazz.getClassFile(); - - // class name. - String javaName = javaName(clazz); - out.writeUTF(javaName); - - CtMethod[] methods = clazz.getDeclaredMethods(); - - // class modifiers. - int classMods = clazz.getModifiers(); - if ((classMods & Modifier.INTERFACE) != 0) - if (methods.length > 0) - classMods = classMods | Modifier.ABSTRACT; - else - classMods = classMods & ~Modifier.ABSTRACT; - - out.writeInt(classMods); - - // interfaces. - String[] interfaces = classFile.getInterfaces(); - for (int i = 0; i < interfaces.length; i++) - interfaces[i] = javaName(interfaces[i]); - - Arrays.sort(interfaces); - for (int i = 0; i < interfaces.length; i++) - out.writeUTF(interfaces[i]); - - // fields. - CtField[] fields = clazz.getDeclaredFields(); - Arrays.sort(fields, new Comparator() { - public int compare(Object o1, Object o2) { - CtField field1 = (CtField)o1; - CtField field2 = (CtField)o2; - return field1.getName().compareTo(field2.getName()); - } - }); - - for (int i = 0; i < fields.length; i++) { - CtField field = (CtField) fields[i]; - int mods = field.getModifiers(); - if (((mods & Modifier.PRIVATE) == 0) || - ((mods & (Modifier.STATIC | Modifier.TRANSIENT)) == 0)) { - out.writeUTF(field.getName()); - out.writeInt(mods); - out.writeUTF(field.getFieldInfo2().getDescriptor()); - } - } - - // static initializer. - if (classFile.getStaticInitializer() != null) { - out.writeUTF(""); - out.writeInt(Modifier.STATIC); - out.writeUTF("()V"); - } - - // constructors. - CtConstructor[] constructors = clazz.getDeclaredConstructors(); - Arrays.sort(constructors, new Comparator() { - public int compare(Object o1, Object o2) { - CtConstructor c1 = (CtConstructor)o1; - CtConstructor c2 = (CtConstructor)o2; - return c1.getMethodInfo2().getDescriptor().compareTo( - c2.getMethodInfo2().getDescriptor()); - } - }); - - for (int i = 0; i < constructors.length; i++) { - CtConstructor constructor = constructors[i]; - int mods = constructor.getModifiers(); - if ((mods & Modifier.PRIVATE) == 0) { - out.writeUTF(""); - out.writeInt(mods); - out.writeUTF(constructor.getMethodInfo2() - .getDescriptor().replace('/', '.')); - } - } - - // methods. - Arrays.sort(methods, new Comparator() { - public int compare(Object o1, Object o2) { - CtMethod m1 = (CtMethod)o1; - CtMethod m2 = (CtMethod)o2; - int value = m1.getName().compareTo(m2.getName()); - if (value == 0) - value = m1.getMethodInfo2().getDescriptor() - .compareTo(m2.getMethodInfo2().getDescriptor()); - - return value; - } - }); - - for (int i = 0; i < methods.length; i++) { - CtMethod method = methods[i]; - int mods = method.getModifiers() - & (Modifier.PUBLIC | Modifier.PRIVATE - | Modifier.PROTECTED | Modifier.STATIC - | Modifier.FINAL | Modifier.SYNCHRONIZED - | Modifier.NATIVE | Modifier.ABSTRACT | Modifier.STRICT); - if ((mods & Modifier.PRIVATE) == 0) { - out.writeUTF(method.getName()); - out.writeInt(mods); - out.writeUTF(method.getMethodInfo2() - .getDescriptor().replace('/', '.')); - } - } - - // calculate hash. - out.flush(); - MessageDigest digest = MessageDigest.getInstance("SHA"); - byte[] digested = digest.digest(bout.toByteArray()); - long hash = 0; - for (int i = Math.min(digested.length, 8) - 1; i >= 0; i--) - hash = (hash << 8) | (digested[i] & 0xFF); - - return hash; - } - catch (IOException e) { - throw new CannotCompileException(e); - } - catch (NoSuchAlgorithmException e) { - throw new CannotCompileException(e); - } - } - - private static String javaName(CtClass clazz) { - return Descriptor.toJavaName(Descriptor.toJvmName(clazz)); - } - - private static String javaName(String name) { - return Descriptor.toJavaName(Descriptor.toJvmName(name)); - } -} diff --git a/src/com/wenshuo/agent/javassist/Translator.java b/src/com/wenshuo/agent/javassist/Translator.java deleted file mode 100644 index 1492f31..0000000 --- a/src/com/wenshuo/agent/javassist/Translator.java +++ /dev/null @@ -1,71 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -/** - * An observer of Loader. - * The users can define a class implementing this - * interface and attach an instance of that class to a - * Loader object so that it can translate a class file - * when the class file is loaded into the JVM. - * - * @see Loader#addTranslator(ClassPool, Translator) - */ -public interface Translator { - /** - * Is invoked by a Loader for initialization - * when the object is attached to the Loader object. - * This method can be used for getting (for caching) some - * CtClass objects that will be accessed - * in onLoad() in Translator. - * - * @param pool the ClassPool that this translator - * should use. - * @see Loader - * @throws NotFoundException if a CtClass cannot be found. - * @throws CannotCompileException if the initialization by this method - * fails. - */ - void start(ClassPool pool) - throws NotFoundException, CannotCompileException; - - /** - * Is invoked by a Loader for notifying that - * a class is loaded. The Loader calls - * - * 

-     * pool.get(classname).toBytecode()
- * - * to read the class file after onLoad() returns. - * - *

classname may be the name of a class - * that has not been created yet. - * If so, onLoad() must create that class so that - * the Loader can read it after onLoad() - * returns. - * - * @param pool the ClassPool that this translator - * should use. - * @param classname the name of the class being loaded. - * @see Loader - * @throws NotFoundException if a CtClass cannot be found. - * @throws CannotCompileException if the code transformation - * by this method fails. - */ - void onLoad(ClassPool pool, String classname) - throws NotFoundException, CannotCompileException; -} diff --git a/src/com/wenshuo/agent/javassist/URLClassPath.java b/src/com/wenshuo/agent/javassist/URLClassPath.java deleted file mode 100644 index a66b87a..0000000 --- a/src/com/wenshuo/agent/javassist/URLClassPath.java +++ /dev/null @@ -1,179 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist; - -import java.io.*; -import java.net.*; - -/** - * A class search-path specified with URL (http). - * - * @see javassist.ClassPath - * @see ClassPool#insertClassPath(ClassPath) - * @see ClassPool#appendClassPath(ClassPath) - */ -public class URLClassPath implements ClassPath { - protected String hostname; - protected int port; - protected String directory; - protected String packageName; - - /** - * Creates a search path specified with URL (http). - * - *

This search path is used only if a requested - * class name starts with the name specified by packageName. - * If packageName is "org.javassist." and a requested class is - * "org.javassist.test.Main", then the given URL is used for loading that class. - * The URLClassPath obtains a class file from: - * - * 

http://www.javassist.org:80/java/classes/org/javassist/test/Main.class
-     *
- * - *

Here, we assume that host is "www.javassist.org", - * port is 80, and directory is "/java/classes/". - * - *

If packageName is null, the URL is used - * for loading any class. - * - * @param host host name - * @param port port number - * @param directory directory name ending with "/". - * It can be "/" (root directory). - * It must start with "/". - * @param packageName package name. It must end with "." (dot). - */ - public URLClassPath(String host, int port, - String directory, String packageName) { - hostname = host; - this.port = port; - this.directory = directory; - this.packageName = packageName; - } - - public String toString() { - return hostname + ":" + port + directory; - } - - /** - * Opens a class file with http. - * - * @return null if the class file could not be found. - */ - public InputStream openClassfile(String classname) { - try { - URLConnection con = openClassfile0(classname); - if (con != null) - return con.getInputStream(); - } - catch (IOException e) {} - return null; // not found - } - - private URLConnection openClassfile0(String classname) throws IOException { - if (packageName == null || classname.startsWith(packageName)) { - String jarname - = directory + classname.replace('.', '/') + ".class"; - return fetchClass0(hostname, port, jarname); - } - else - return null; // not found - } - - /** - * Returns the URL. - * - * @return null if the class file could not be obtained. - */ - public URL find(String classname) { - try { - URLConnection con = openClassfile0(classname); - InputStream is = con.getInputStream(); - if (is != null) { - is.close(); - return con.getURL(); - } - } - catch (IOException e) {} - return null; - } - - /** - * Closes this class path. - */ - public void close() {} - - /** - * Reads a class file on an http server. - * - * @param host host name - * @param port port number - * @param directory directory name ending with "/". - * It can be "/" (root directory). - * It must start with "/". - * @param classname fully-qualified class name - */ - public static byte[] fetchClass(String host, int port, - String directory, String classname) - throws IOException - { - byte[] b; - URLConnection con = fetchClass0(host, port, - directory + classname.replace('.', '/') + ".class"); - int size = con.getContentLength(); - InputStream s = con.getInputStream(); - try { - if (size <= 0) - b = ClassPoolTail.readStream(s); - else { - b = new byte[size]; - int len = 0; - do { - int n = s.read(b, len, size - len); - if (n < 0) - throw new IOException("the stream was closed: " - + classname); - - len += n; - } while (len < size); - } - } - finally { - s.close(); - } - - return b; - } - - private static URLConnection fetchClass0(String host, int port, - String filename) - throws IOException - { - URL url; - try { - url = new URL("http", host, port, filename); - } - catch (MalformedURLException e) { - // should never reache here. - throw new IOException("invalid URL?"); - } - - URLConnection con = url.openConnection(); - con.connect(); - return con; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/AccessFlag.java b/src/com/wenshuo/agent/javassist/bytecode/AccessFlag.java deleted file mode 100644 index e550e23..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/AccessFlag.java +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * A support class providing static methods and constants - * for access modifiers such as public, private, ... - */ -public class AccessFlag { - public static final int PUBLIC = 0x0001; - public static final int PRIVATE = 0x0002; - public static final int PROTECTED = 0x0004; - public static final int STATIC = 0x0008; - public static final int FINAL = 0x0010; - public static final int SYNCHRONIZED = 0x0020; - public static final int VOLATILE = 0x0040; - public static final int BRIDGE = 0x0040; // for method_info - public static final int TRANSIENT = 0x0080; - public static final int VARARGS = 0x0080; // for method_info - public static final int NATIVE = 0x0100; - public static final int INTERFACE = 0x0200; - public static final int ABSTRACT = 0x0400; - public static final int STRICT = 0x0800; - public static final int SYNTHETIC = 0x1000; - public static final int ANNOTATION = 0x2000; - public static final int ENUM = 0x4000; - public static final int MANDATED = 0x8000; - - public static final int SUPER = 0x0020; - - // Note: 0x0020 is assigned to both ACC_SUPER and ACC_SYNCHRONIZED - // although java.lang.reflect.Modifier does not recognize ACC_SUPER. - - /** - * Truns the public bit on. The protected and private bits are - * cleared. - */ - public static int setPublic(int accflags) { - return (accflags & ~(PRIVATE | PROTECTED)) | PUBLIC; - } - - /** - * Truns the protected bit on. The protected and public bits are - * cleared. - */ - public static int setProtected(int accflags) { - return (accflags & ~(PRIVATE | PUBLIC)) | PROTECTED; - } - - /** - * Truns the private bit on. The protected and private bits are - * cleared. - */ - public static int setPrivate(int accflags) { - return (accflags & ~(PROTECTED | PUBLIC)) | PRIVATE; - } - - /** - * Clears the public, protected, and private bits. - */ - public static int setPackage(int accflags) { - return (accflags & ~(PROTECTED | PUBLIC | PRIVATE)); - } - - /** - * Returns true if the access flags include the public bit. - */ - public static boolean isPublic(int accflags) { - return (accflags & PUBLIC) != 0; - } - - /** - * Returns true if the access flags include the protected bit. - */ - public static boolean isProtected(int accflags) { - return (accflags & PROTECTED) != 0; - } - - /** - * Returns true if the access flags include the private bit. - */ - public static boolean isPrivate(int accflags) { - return (accflags & PRIVATE) != 0; - } - - /** - * Returns true if the access flags include neither public, protected, - * or private. - */ - public static boolean isPackage(int accflags) { - return (accflags & (PROTECTED | PUBLIC | PRIVATE)) == 0; - } - - /** - * Clears a specified bit in accflags. - */ - public static int clear(int accflags, int clearBit) { - return accflags & ~clearBit; - } - - /** - * Converts a javassist.Modifier into - * a javassist.bytecode.AccessFlag. - * - * @param modifier javassist.Modifier - */ - public static int of(int modifier) { - return modifier; - } - - /** - * Converts a javassist.bytecode.AccessFlag - * into a javassist.Modifier. - * - * @param accflags javassist.bytecode.Accessflag - */ - public static int toModifier(int accflags) { - return accflags; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java deleted file mode 100644 index 4bbddf3..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java +++ /dev/null @@ -1,160 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.bytecode.annotation.AnnotationsWriter; -import com.wenshuo.agent.javassist.bytecode.annotation.MemberValue; - -import java.io.ByteArrayOutputStream; -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * A class representing AnnotationDefault_attribute. - * - *

For example, if you declare the following annotation type: - * - * 

- * @interface Author {
- *   String name() default "Shakespeare";
- *   int age() default 99;
- * }
- *
- * - *

The defautl values of name and age - * are stored as annotation default attributes in Author.class. - * The following code snippet obtains the default value of name: - * - * 

- * ClassPool pool = ...
- * CtClass cc = pool.get("Author");
- * CtMethod cm = cc.getDeclaredMethod("age");
- * MethodInfo minfo = cm.getMethodInfo();
- * AnnotationDefaultAttribute ada
- *         = (AnnotationDefaultAttribute)
- *           minfo.getAttribute(AnnotationDefaultAttribute.tag);
- * MemberValue value = ada.getDefaultValue());    // default value of age
- *
- * - *

If the following statement is executed after the code above, - * the default value of age is set to 80: - * - * 

- * ada.setDefaultValue(new IntegerMemberValue(minfo.getConstPool(), 80));
- *
- * - * @see AnnotationsAttribute - * @see javassist.bytecode.annotation.MemberValue - */ - -public class AnnotationDefaultAttribute extends AttributeInfo { - /** - * The name of the AnnotationDefault attribute. - */ - public static final String tag = "AnnotationDefault"; - - /** - * Constructs an AnnotationDefault_attribute. - * - * @param cp constant pool - * @param info the contents of this attribute. It does not - * include attribute_name_index or - * attribute_length. - */ - public AnnotationDefaultAttribute(ConstPool cp, byte[] info) { - super(cp, tag, info); - } - - /** - * Constructs an empty AnnotationDefault_attribute. - * The default value can be set by setDefaultValue(). - * - * @param cp constant pool - * @see #setDefaultValue(javassist.bytecode.annotation.MemberValue) - */ - public AnnotationDefaultAttribute(ConstPool cp) { - this(cp, new byte[] { 0, 0 }); - } - - /** - * @param n the attribute name. - */ - AnnotationDefaultAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Copies this attribute and returns a new copy. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - AnnotationsAttribute.Copier copier - = new AnnotationsAttribute.Copier(info, constPool, newCp, classnames); - try { - copier.memberValue(0); - return new AnnotationDefaultAttribute(newCp, copier.close()); - } - catch (Exception e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Obtains the default value represented by this attribute. - */ - public MemberValue getDefaultValue() - { - try { - return new AnnotationsAttribute.Parser(info, constPool) - .parseMemberValue(); - } - catch (Exception e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Changes the default value represented by this attribute. - * - * @param value the new value. - * @see javassist.bytecode.annotation.Annotation#createMemberValue(ConstPool, CtClass) - */ - public void setDefaultValue(MemberValue value) { - ByteArrayOutputStream output = new ByteArrayOutputStream(); - AnnotationsWriter writer = new AnnotationsWriter(output, constPool); - try { - value.write(writer); - writer.close(); - } - catch (IOException e) { - throw new RuntimeException(e); // should never reach here. - } - - set(output.toByteArray()); - - } - - /** - * Returns a string representation of this object. - */ - public String toString() { - return getDefaultValue().toString(); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java deleted file mode 100644 index 59fa6a4..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java +++ /dev/null @@ -1,732 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.util.Map; -import java.util.HashMap; -import java.io.IOException; -import java.io.DataInputStream; -import java.io.ByteArrayOutputStream; -import com.wenshuo.agent.javassist.bytecode.annotation.*; - -/** - * A class representing - * RuntimeVisibleAnnotations_attribute and - * RuntimeInvisibleAnnotations_attribute. - * - *

To obtain an AnnotationAttribute object, invoke - * getAttribute(AnnotationsAttribute.visibleTag) - * in ClassFile, MethodInfo, - * or FieldInfo. The obtained attribute is a - * runtime visible annotations attribute. - * If the parameter is - * AnnotationAttribute.invisibleTag, then the obtained - * attribute is a runtime invisible one. - * - *

For example, - * - * 

- * import com.wenshuo.agent.javassist.bytecode.annotation.Annotation;
- *    :
- * CtMethod m = ... ;
- * MethodInfo minfo = m.getMethodInfo();
- * AnnotationsAttribute attr = (AnnotationsAttribute)
- *         minfo.getAttribute(AnnotationsAttribute.invisibleTag);
- * Annotation an = attr.getAnnotation("Author");
- * String s = ((StringMemberValue)an.getMemberValue("name")).getValue();
- * System.out.println("@Author(name=" + s + ")");
- *
- * - *

This code snippet retrieves an annotation of the type Author - * from the MethodInfo object specified by minfo. - * Then, it prints the value of name in Author. - * - *

If the annotation type Author is annotated by a meta annotation: - * - * 

- * @Retention(RetentionPolicy.RUNTIME)
- *
- * - *

Then Author is visible at runtime. Therefore, the third - * statement of the code snippet above must be changed into: - * - * 

- * AnnotationsAttribute attr = (AnnotationsAttribute)
- *         minfo.getAttribute(AnnotationsAttribute.visibleTag);
- *
- * - *

The attribute tag must be visibleTag instead of - * invisibleTag. - * - *

If the member value of an annotation is not specified, the default value - * is used as that member value. If so, getMemberValue() in - * Annotation returns null - * since the default value is not included in the - * AnnotationsAttribute. It is included in the - * AnnotationDefaultAttribute of the method declared in the - * annotation type. - * - *

If you want to record a new AnnotationAttribute object, execute the - * following snippet: - * - * 

- * ClassFile cf = ... ;
- * ConstPool cp = cf.getConstPool();
- * AnnotationsAttribute attr
- *     = new AnnotationsAttribute(cp, AnnotationsAttribute.visibleTag);
- * Annotation a = new Annotation("Author", cp);
- * a.addMemberValue("name", new StringMemberValue("Chiba", cp));
- * attr.setAnnotation(a);
- * cf.addAttribute(attr);
- * cf.setVersionToJava5();
- *
- * - *

The last statement is necessary if the class file was produced by - * javac of JDK 1.4 or earlier. Otherwise, it is not necessary. - * - * @see AnnotationDefaultAttribute - * @see javassist.bytecode.annotation.Annotation - */ -public class AnnotationsAttribute extends AttributeInfo { - /** - * The name of the RuntimeVisibleAnnotations attribute. - */ - public static final String visibleTag = "RuntimeVisibleAnnotations"; - - /** - * The name of the RuntimeInvisibleAnnotations attribute. - */ - public static final String invisibleTag = "RuntimeInvisibleAnnotations"; - - /** - * Constructs a Runtime(In)VisibleAnnotations_attribute. - * - * @param cp constant pool - * @param attrname attribute name (visibleTag or - * invisibleTag). - * @param info the contents of this attribute. It does not - * include attribute_name_index or - * attribute_length. - */ - public AnnotationsAttribute(ConstPool cp, String attrname, byte[] info) { - super(cp, attrname, info); - } - - /** - * Constructs an empty - * Runtime(In)VisibleAnnotations_attribute. - * A new annotation can be later added to the created attribute - * by setAnnotations(). - * - * @param cp constant pool - * @param attrname attribute name (visibleTag or - * invisibleTag). - * @see #setAnnotations(Annotation[]) - */ - public AnnotationsAttribute(ConstPool cp, String attrname) { - this(cp, attrname, new byte[] { 0, 0 }); - } - - /** - * @param n the attribute name. - */ - AnnotationsAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Returns num_annotations. - */ - public int numAnnotations() { - return ByteArray.readU16bit(info, 0); - } - - /** - * Copies this attribute and returns a new copy. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - Copier copier = new Copier(info, constPool, newCp, classnames); - try { - copier.annotationArray(); - return new AnnotationsAttribute(newCp, getName(), copier.close()); - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * Parses the annotations and returns a data structure representing - * the annotation with the specified type. See also - * getAnnotations() as to the returned data structure. - * - * @param type the annotation type. - * @return null if the specified annotation type is not included. - * @see #getAnnotations() - */ - public Annotation getAnnotation(String type) { - Annotation[] annotations = getAnnotations(); - for (int i = 0; i < annotations.length; i++) { - if (annotations[i].getTypeName().equals(type)) - return annotations[i]; - } - - return null; - } - - /** - * Adds an annotation. If there is an annotation with the same type, - * it is removed before the new annotation is added. - * - * @param annotation the added annotation. - */ - public void addAnnotation(Annotation annotation) { - String type = annotation.getTypeName(); - Annotation[] annotations = getAnnotations(); - for (int i = 0; i < annotations.length; i++) { - if (annotations[i].getTypeName().equals(type)) { - annotations[i] = annotation; - setAnnotations(annotations); - return; - } - } - - Annotation[] newlist = new Annotation[annotations.length + 1]; - System.arraycopy(annotations, 0, newlist, 0, annotations.length); - newlist[annotations.length] = annotation; - setAnnotations(newlist); - } - - /** - * Parses the annotations and returns a data structure representing - * that parsed annotations. Note that changes of the node values of the - * returned tree are not reflected on the annotations represented by - * this object unless the tree is copied back to this object by - * setAnnotations(). - * - * @see #setAnnotations(Annotation[]) - */ - public Annotation[] getAnnotations() { - try { - return new Parser(info, constPool).parseAnnotations(); - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * Changes the annotations represented by this object according to - * the given array of Annotation objects. - * - * @param annotations the data structure representing the - * new annotations. - */ - public void setAnnotations(Annotation[] annotations) { - ByteArrayOutputStream output = new ByteArrayOutputStream(); - AnnotationsWriter writer = new AnnotationsWriter(output, constPool); - try { - int n = annotations.length; - writer.numAnnotations(n); - for (int i = 0; i < n; ++i) - annotations[i].write(writer); - - writer.close(); - } - catch (IOException e) { - throw new RuntimeException(e); // should never reach here. - } - - set(output.toByteArray()); - } - - /** - * Changes the annotations. A call to this method is equivalent to: - * 

setAnnotations(new Annotation[] { annotation })
- * - * @param annotation the data structure representing - * the new annotation. - */ - public void setAnnotation(Annotation annotation) { - setAnnotations(new Annotation[] { annotation }); - } - - /** - * @param oldname a JVM class name. - * @param newname a JVM class name. - */ - void renameClass(String oldname, String newname) { - HashMap map = new HashMap(); - map.put(oldname, newname); - renameClass(map); - } - - void renameClass(Map classnames) { - Renamer renamer = new Renamer(info, getConstPool(), classnames); - try { - renamer.annotationArray(); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - - void getRefClasses(Map classnames) { renameClass(classnames); } - - /** - * Returns a string representation of this object. - */ - public String toString() { - Annotation[] a = getAnnotations(); - StringBuilder sbuf = new StringBuilder(); - int i = 0; - while (i < a.length) { - sbuf.append(a[i++].toString()); - if (i != a.length) - sbuf.append(", "); - } - - return sbuf.toString(); - } - - static class Walker { - byte[] info; - - Walker(byte[] attrInfo) { - info = attrInfo; - } - - final void parameters() throws Exception { - int numParam = info[0] & 0xff; - parameters(numParam, 1); - } - - void parameters(int numParam, int pos) throws Exception { - for (int i = 0; i < numParam; ++i) - pos = annotationArray(pos); - } - - final void annotationArray() throws Exception { - annotationArray(0); - } - - final int annotationArray(int pos) throws Exception { - int num = ByteArray.readU16bit(info, pos); - return annotationArray(pos + 2, num); - } - - int annotationArray(int pos, int num) throws Exception { - for (int i = 0; i < num; ++i) - pos = annotation(pos); - - return pos; - } - - final int annotation(int pos) throws Exception { - int type = ByteArray.readU16bit(info, pos); - int numPairs = ByteArray.readU16bit(info, pos + 2); - return annotation(pos + 4, type, numPairs); - } - - int annotation(int pos, int type, int numPairs) throws Exception { - for (int j = 0; j < numPairs; ++j) - pos = memberValuePair(pos); - - return pos; - } - - /** - * {@code element_value_paris} - */ - final int memberValuePair(int pos) throws Exception { - int nameIndex = ByteArray.readU16bit(info, pos); - return memberValuePair(pos + 2, nameIndex); - } - - /** - * {@code element_value_paris[]} - */ - int memberValuePair(int pos, int nameIndex) throws Exception { - return memberValue(pos); - } - - /** - * {@code element_value} - */ - final int memberValue(int pos) throws Exception { - int tag = info[pos] & 0xff; - if (tag == 'e') { - int typeNameIndex = ByteArray.readU16bit(info, pos + 1); - int constNameIndex = ByteArray.readU16bit(info, pos + 3); - enumMemberValue(pos, typeNameIndex, constNameIndex); - return pos + 5; - } - else if (tag == 'c') { - int index = ByteArray.readU16bit(info, pos + 1); - classMemberValue(pos, index); - return pos + 3; - } - else if (tag == '@') - return annotationMemberValue(pos + 1); - else if (tag == '[') { - int num = ByteArray.readU16bit(info, pos + 1); - return arrayMemberValue(pos + 3, num); - } - else { // primitive types or String. - int index = ByteArray.readU16bit(info, pos + 1); - constValueMember(tag, index); - return pos + 3; - } - } - - /** - * {@code const_value_index} - */ - void constValueMember(int tag, int index) throws Exception {} - - /** - * {@code enum_const_value} - */ - void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) - throws Exception { - } - - /** - * {@code class_info_index} - */ - void classMemberValue(int pos, int index) throws Exception {} - - /** - * {@code annotation_value} - */ - int annotationMemberValue(int pos) throws Exception { - return annotation(pos); - } - - /** - * {@code array_value} - */ - int arrayMemberValue(int pos, int num) throws Exception { - for (int i = 0; i < num; ++i) { - pos = memberValue(pos); - } - - return pos; - } - } - - static class Renamer extends Walker { - ConstPool cpool; - Map classnames; - - /** - * Constructs a renamer. It renames some class names - * into the new names specified by map. - * - * @param info the annotations attribute. - * @param cp the constant pool. - * @param map pairs of replaced and substituted class names. - * It can be null. - */ - Renamer(byte[] info, ConstPool cp, Map map) { - super(info); - cpool = cp; - classnames = map; - } - - int annotation(int pos, int type, int numPairs) throws Exception { - renameType(pos - 4, type); - return super.annotation(pos, type, numPairs); - } - - void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) - throws Exception - { - renameType(pos + 1, typeNameIndex); - super.enumMemberValue(pos, typeNameIndex, constNameIndex); - } - - void classMemberValue(int pos, int index) throws Exception { - renameType(pos + 1, index); - super.classMemberValue(pos, index); - } - - private void renameType(int pos, int index) { - String name = cpool.getUtf8Info(index); - String newName = Descriptor.rename(name, classnames); - if (!name.equals(newName)) { - int index2 = cpool.addUtf8Info(newName); - ByteArray.write16bit(index2, info, pos); - } - } - } - - static class Copier extends Walker { - ByteArrayOutputStream output; - AnnotationsWriter writer; - ConstPool srcPool, destPool; - Map classnames; - - /** - * Constructs a copier. This copier renames some class names - * into the new names specified by map when it copies - * an annotation attribute. - * - * @param info the source attribute. - * @param src the constant pool of the source class. - * @param dest the constant pool of the destination class. - * @param map pairs of replaced and substituted class names. - * It can be null. - */ - Copier(byte[] info, ConstPool src, ConstPool dest, Map map) { - this(info, src, dest, map, true); - } - - Copier(byte[] info, ConstPool src, ConstPool dest, Map map, boolean makeWriter) { - super(info); - output = new ByteArrayOutputStream(); - if (makeWriter) - writer = new AnnotationsWriter(output, dest); - - srcPool = src; - destPool = dest; - classnames = map; - } - - byte[] close() throws IOException { - writer.close(); - return output.toByteArray(); - } - - void parameters(int numParam, int pos) throws Exception { - writer.numParameters(numParam); - super.parameters(numParam, pos); - } - - int annotationArray(int pos, int num) throws Exception { - writer.numAnnotations(num); - return super.annotationArray(pos, num); - } - - int annotation(int pos, int type, int numPairs) throws Exception { - writer.annotation(copyType(type), numPairs); - return super.annotation(pos, type, numPairs); - } - - int memberValuePair(int pos, int nameIndex) throws Exception { - writer.memberValuePair(copy(nameIndex)); - return super.memberValuePair(pos, nameIndex); - } - - void constValueMember(int tag, int index) throws Exception { - writer.constValueIndex(tag, copy(index)); - super.constValueMember(tag, index); - } - - void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) - throws Exception - { - writer.enumConstValue(copyType(typeNameIndex), copy(constNameIndex)); - super.enumMemberValue(pos, typeNameIndex, constNameIndex); - } - - void classMemberValue(int pos, int index) throws Exception { - writer.classInfoIndex(copyType(index)); - super.classMemberValue(pos, index); - } - - int annotationMemberValue(int pos) throws Exception { - writer.annotationValue(); - return super.annotationMemberValue(pos); - } - - int arrayMemberValue(int pos, int num) throws Exception { - writer.arrayValue(num); - return super.arrayMemberValue(pos, num); - } - - /** - * Copies a constant pool entry into the destination constant pool - * and returns the index of the copied entry. - * - * @param srcIndex the index of the copied entry into the source - * constant pool. - * @return the index of the copied item into the destination - * constant pool. - */ - int copy(int srcIndex) { - return srcPool.copy(srcIndex, destPool, classnames); - } - - /** - * Copies a constant pool entry into the destination constant pool - * and returns the index of the copied entry. That entry must be - * a Utf8Info representing a class name in the L; form. - * - * @param srcIndex the index of the copied entry into the source - * constant pool. - * @return the index of the copied item into the destination - * constant pool. - */ - int copyType(int srcIndex) { - String name = srcPool.getUtf8Info(srcIndex); - String newName = Descriptor.rename(name, classnames); - return destPool.addUtf8Info(newName); - } - } - - static class Parser extends Walker { - ConstPool pool; - Annotation[][] allParams; // all parameters - Annotation[] allAnno; // all annotations - Annotation currentAnno; // current annotation - MemberValue currentMember; // current member - - /** - * Constructs a parser. This parser constructs a parse tree of - * the annotations. - * - * @param info the attribute. - * @param src the constant pool. - */ - Parser(byte[] info, ConstPool cp) { - super(info); - pool = cp; - } - - Annotation[][] parseParameters() throws Exception { - parameters(); - return allParams; - } - - Annotation[] parseAnnotations() throws Exception { - annotationArray(); - return allAnno; - } - - MemberValue parseMemberValue() throws Exception { - memberValue(0); - return currentMember; - } - - void parameters(int numParam, int pos) throws Exception { - Annotation[][] params = new Annotation[numParam][]; - for (int i = 0; i < numParam; ++i) { - pos = annotationArray(pos); - params[i] = allAnno; - } - - allParams = params; - } - - int annotationArray(int pos, int num) throws Exception { - Annotation[] array = new Annotation[num]; - for (int i = 0; i < num; ++i) { - pos = annotation(pos); - array[i] = currentAnno; - } - - allAnno = array; - return pos; - } - - int annotation(int pos, int type, int numPairs) throws Exception { - currentAnno = new Annotation(type, pool); - return super.annotation(pos, type, numPairs); - } - - int memberValuePair(int pos, int nameIndex) throws Exception { - pos = super.memberValuePair(pos, nameIndex); - currentAnno.addMemberValue(nameIndex, currentMember); - return pos; - } - - void constValueMember(int tag, int index) throws Exception { - MemberValue m; - ConstPool cp = pool; - switch (tag) { - case 'B' : - m = new ByteMemberValue(index, cp); - break; - case 'C' : - m = new CharMemberValue(index, cp); - break; - case 'D' : - m = new DoubleMemberValue(index, cp); - break; - case 'F' : - m = new FloatMemberValue(index, cp); - break; - case 'I' : - m = new IntegerMemberValue(index, cp); - break; - case 'J' : - m = new LongMemberValue(index, cp); - break; - case 'S' : - m = new ShortMemberValue(index, cp); - break; - case 'Z' : - m = new BooleanMemberValue(index, cp); - break; - case 's' : - m = new StringMemberValue(index, cp); - break; - default : - throw new RuntimeException("unknown tag:" + tag); - } - - currentMember = m; - super.constValueMember(tag, index); - } - - void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) - throws Exception - { - currentMember = new EnumMemberValue(typeNameIndex, - constNameIndex, pool); - super.enumMemberValue(pos, typeNameIndex, constNameIndex); - } - - void classMemberValue(int pos, int index) throws Exception { - currentMember = new ClassMemberValue(index, pool); - super.classMemberValue(pos, index); - } - - int annotationMemberValue(int pos) throws Exception { - Annotation anno = currentAnno; - pos = super.annotationMemberValue(pos); - currentMember = new AnnotationMemberValue(currentAnno, pool); - currentAnno = anno; - return pos; - } - - int arrayMemberValue(int pos, int num) throws Exception { - ArrayMemberValue amv = new ArrayMemberValue(pool); - MemberValue[] elements = new MemberValue[num]; - for (int i = 0; i < num; ++i) { - pos = memberValue(pos); - elements[i] = currentMember; - } - - amv.setValue(elements); - currentMember = amv; - return pos; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java b/src/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java deleted file mode 100644 index b8f799a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java +++ /dev/null @@ -1,303 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.Map; -import java.util.ArrayList; -import java.util.ListIterator; -import java.util.List; -import java.util.Iterator; - -// Note: if you define a new subclass of AttributeInfo, then -// update AttributeInfo.read(), .copy(), and (maybe) write(). - -/** - * attribute_info structure. - */ -public class AttributeInfo { - protected ConstPool constPool; - int name; - byte[] info; - - protected AttributeInfo(ConstPool cp, int attrname, byte[] attrinfo) { - constPool = cp; - name = attrname; - info = attrinfo; - } - - protected AttributeInfo(ConstPool cp, String attrname) { - this(cp, attrname, (byte[])null); - } - - /** - * Constructs an attribute_info structure. - * - * @param cp constant pool table - * @param attrname attribute name - * @param attrinfo info field - * of attribute_info structure. - */ - public AttributeInfo(ConstPool cp, String attrname, byte[] attrinfo) { - this(cp, cp.addUtf8Info(attrname), attrinfo); - } - - protected AttributeInfo(ConstPool cp, int n, DataInputStream in) - throws IOException - { - constPool = cp; - name = n; - int len = in.readInt(); - info = new byte[len]; - if (len > 0) - in.readFully(info); - } - - static AttributeInfo read(ConstPool cp, DataInputStream in) - throws IOException - { - int name = in.readUnsignedShort(); - String nameStr = cp.getUtf8Info(name); - char first = nameStr.charAt(0); - if (first < 'M') { - if (first < 'E') { - if (nameStr.equals(AnnotationDefaultAttribute.tag)) - return new AnnotationDefaultAttribute(cp, name, in); - else if (nameStr.equals(BootstrapMethodsAttribute.tag)) - return new BootstrapMethodsAttribute(cp, name, in); - else if (nameStr.equals(CodeAttribute.tag)) - return new CodeAttribute(cp, name, in); - else if (nameStr.equals(ConstantAttribute.tag)) - return new ConstantAttribute(cp, name, in); - else if (nameStr.equals(DeprecatedAttribute.tag)) - return new DeprecatedAttribute(cp, name, in); - } - else { - if (nameStr.equals(EnclosingMethodAttribute.tag)) - return new EnclosingMethodAttribute(cp, name, in); - else if (nameStr.equals(ExceptionsAttribute.tag)) - return new ExceptionsAttribute(cp, name, in); - else if (nameStr.equals(InnerClassesAttribute.tag)) - return new InnerClassesAttribute(cp, name, in); - else if (nameStr.equals(LineNumberAttribute.tag)) - return new LineNumberAttribute(cp, name, in); - else if (nameStr.equals(LocalVariableAttribute.tag)) - return new LocalVariableAttribute(cp, name, in); - else if (nameStr.equals(LocalVariableTypeAttribute.tag)) - return new LocalVariableTypeAttribute(cp, name, in); - } - } - else { - if (first < 'S') { - /* Note that the names of Annotations attributes begin with 'R'. - */ - if (nameStr.equals(MethodParametersAttribute.tag)) - return new MethodParametersAttribute(cp, name, in); - else if (nameStr.equals(AnnotationsAttribute.visibleTag) - || nameStr.equals(AnnotationsAttribute.invisibleTag)) { - // RuntimeVisibleAnnotations or RuntimeInvisibleAnnotations - return new AnnotationsAttribute(cp, name, in); - } - else if (nameStr.equals(ParameterAnnotationsAttribute.visibleTag) - || nameStr.equals(ParameterAnnotationsAttribute.invisibleTag)) - return new ParameterAnnotationsAttribute(cp, name, in); - else if (nameStr.equals(TypeAnnotationsAttribute.visibleTag) - || nameStr.equals(TypeAnnotationsAttribute.invisibleTag)) - return new TypeAnnotationsAttribute(cp, name, in); - } - else { - if (nameStr.equals(SignatureAttribute.tag)) - return new SignatureAttribute(cp, name, in); - else if (nameStr.equals(SourceFileAttribute.tag)) - return new SourceFileAttribute(cp, name, in); - else if (nameStr.equals(SyntheticAttribute.tag)) - return new SyntheticAttribute(cp, name, in); - else if (nameStr.equals(StackMap.tag)) - return new StackMap(cp, name, in); - else if (nameStr.equals(StackMapTable.tag)) - return new StackMapTable(cp, name, in); - } - } - - return new AttributeInfo(cp, name, in); - } - - /** - * Returns an attribute name. - */ - public String getName() { - return constPool.getUtf8Info(name); - } - - /** - * Returns a constant pool table. - */ - public ConstPool getConstPool() { return constPool; } - - /** - * Returns the length of this attribute_info - * structure. - * The returned value is attribute_length + 6. - */ - public int length() { - return info.length + 6; - } - - /** - * Returns the info field - * of this attribute_info structure. - * - *

This method is not available if the object is an instance - * of CodeAttribute. - */ - public byte[] get() { return info; } - - /** - * Sets the info field - * of this attribute_info structure. - * - *

This method is not available if the object is an instance - * of CodeAttribute. - */ - public void set(byte[] newinfo) { info = newinfo; } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - int s = info.length; - byte[] srcInfo = info; - byte[] newInfo = new byte[s]; - for (int i = 0; i < s; ++i) - newInfo[i] = srcInfo[i]; - - return new AttributeInfo(newCp, getName(), newInfo); - } - - void write(DataOutputStream out) throws IOException { - out.writeShort(name); - out.writeInt(info.length); - if (info.length > 0) - out.write(info); - } - - static int getLength(ArrayList list) { - int size = 0; - int n = list.size(); - for (int i = 0; i < n; ++i) { - AttributeInfo attr = (AttributeInfo)list.get(i); - size += attr.length(); - } - - return size; - } - - static AttributeInfo lookup(ArrayList list, String name) { - if (list == null) - return null; - - ListIterator iterator = list.listIterator(); - while (iterator.hasNext()) { - AttributeInfo ai = (AttributeInfo)iterator.next(); - if (ai.getName().equals(name)) - return ai; - } - - return null; // no such attribute - } - - static synchronized void remove(ArrayList list, String name) { - if (list == null) - return; - - ListIterator iterator = list.listIterator(); - while (iterator.hasNext()) { - AttributeInfo ai = (AttributeInfo)iterator.next(); - if (ai.getName().equals(name)) - iterator.remove(); - } - } - - static void writeAll(ArrayList list, DataOutputStream out) - throws IOException - { - if (list == null) - return; - - int n = list.size(); - for (int i = 0; i < n; ++i) { - AttributeInfo attr = (AttributeInfo)list.get(i); - attr.write(out); - } - } - - static ArrayList copyAll(ArrayList list, ConstPool cp) { - if (list == null) - return null; - - ArrayList newList = new ArrayList(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - AttributeInfo attr = (AttributeInfo)list.get(i); - newList.add(attr.copy(cp, null)); - } - - return newList; - } - - /* The following two methods are used to implement - * ClassFile.renameClass(). - * Only CodeAttribute, LocalVariableAttribute, - * AnnotationsAttribute, and SignatureAttribute - * override these methods. - */ - void renameClass(String oldname, String newname) {} - void renameClass(Map classnames) {} - - static void renameClass(List attributes, String oldname, String newname) { - Iterator iterator = attributes.iterator(); - while (iterator.hasNext()) { - AttributeInfo ai = (AttributeInfo)iterator.next(); - ai.renameClass(oldname, newname); - } - } - - static void renameClass(List attributes, Map classnames) { - Iterator iterator = attributes.iterator(); - while (iterator.hasNext()) { - AttributeInfo ai = (AttributeInfo)iterator.next(); - ai.renameClass(classnames); - } - } - - void getRefClasses(Map classnames) {} - - static void getRefClasses(List attributes, Map classnames) { - Iterator iterator = attributes.iterator(); - while (iterator.hasNext()) { - AttributeInfo ai = (AttributeInfo)iterator.next(); - ai.getRefClasses(classnames); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/BadBytecode.java b/src/com/wenshuo/agent/javassist/bytecode/BadBytecode.java deleted file mode 100644 index 6aeafc7..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/BadBytecode.java +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * Signals that a bad bytecode sequence has been found. - */ -public class BadBytecode extends Exception { - public BadBytecode(int opcode) { - super("bytecode " + opcode); - } - - public BadBytecode(String msg) { - super(msg); - } - - public BadBytecode(String msg, Throwable cause) { - super(msg, cause); - } - - public BadBytecode(MethodInfo minfo, Throwable cause) { - super(minfo.toString() + " in " - + minfo.getConstPool().getClassName() - + ": " + cause.getMessage(), cause); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java deleted file mode 100644 index 194c431..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java +++ /dev/null @@ -1,123 +0,0 @@ -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -public class BootstrapMethodsAttribute extends AttributeInfo { - /** - * The name of this attribute "BootstrapMethods". - */ - public static final String tag = "BootstrapMethods"; - - /** - * An element of bootstrap_methods. - */ - public static class BootstrapMethod { - /** - * Constructs an element of bootstrap_methods. - * - * @param method bootstrap_method_ref. - * @param args bootstrap_arguments. - */ - public BootstrapMethod(int method, int[] args) { - methodRef = method; - arguments = args; - } - - /** - * bootstrap_method_ref. - * The value at this index must be a CONSTANT_MethodHandle_info. - */ - public int methodRef; - - /** - * bootstrap_arguments. - */ - public int[] arguments; - } - - BootstrapMethodsAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a BootstrapMethods attribute. - * - * @param cp a constant pool table. - * @param methods the contents. - */ - public BootstrapMethodsAttribute(ConstPool cp, BootstrapMethod[] methods) { - super(cp, tag); - int size = 2; - for (int i = 0; i < methods.length; i++) - size += 4 + methods[i].arguments.length * 2; - - byte[] data = new byte[size]; - ByteArray.write16bit(methods.length, data, 0); // num_bootstrap_methods - int pos = 2; - for (int i = 0; i < methods.length; i++) { - ByteArray.write16bit(methods[i].methodRef, data, pos); - ByteArray.write16bit(methods[i].arguments.length, data, pos + 2); - int[] args = methods[i].arguments; - pos += 4; - for (int k = 0; k < args.length; k++) { - ByteArray.write16bit(args[k], data, pos); - pos += 2; - } - } - - set(data); - } - - /** - * Obtains bootstrap_methods in this attribute. - * - * @return an array of BootstrapMethod. Since it - * is a fresh copy, modifying the returned array does not - * affect the original contents of this attribute. - */ - public BootstrapMethod[] getMethods() { - byte[] data = this.get(); - int num = ByteArray.readU16bit(data, 0); - BootstrapMethod[] methods = new BootstrapMethod[num]; - int pos = 2; - for (int i = 0; i < num; i++) { - int ref = ByteArray.readU16bit(data, pos); - int len = ByteArray.readU16bit(data, pos + 2); - int[] args = new int[len]; - pos += 4; - for (int k = 0; k < len; k++) { - args[k] = ByteArray.readU16bit(data, pos); - pos += 2; - } - - methods[i] = new BootstrapMethod(ref, args); - } - - return methods; - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - BootstrapMethod[] methods = getMethods(); - ConstPool thisCp = getConstPool(); - for (int i = 0; i < methods.length; i++) { - BootstrapMethod m = methods[i]; - m.methodRef = thisCp.copy(m.methodRef, newCp, classnames); - for (int k = 0; k < m.arguments.length; k++) - m.arguments[k] = thisCp.copy(m.arguments[k], newCp, classnames); - } - - return new BootstrapMethodsAttribute(newCp, methods); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ByteArray.java b/src/com/wenshuo/agent/javassist/bytecode/ByteArray.java deleted file mode 100644 index ad8fc3f..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ByteArray.java +++ /dev/null @@ -1,77 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * A collection of static methods for reading and writing a byte array. - */ -public class ByteArray { - /** - * Reads an unsigned 16bit integer at the index. - */ - public static int readU16bit(byte[] code, int index) { - return ((code[index] & 0xff) << 8) | (code[index + 1] & 0xff); - } - - /** - * Reads a signed 16bit integer at the index. - */ - public static int readS16bit(byte[] code, int index) { - return (code[index] << 8) | (code[index + 1] & 0xff); - } - - /** - * Writes a 16bit integer at the index. - */ - public static void write16bit(int value, byte[] code, int index) { - code[index] = (byte)(value >>> 8); - code[index + 1] = (byte)value; - } - - /** - * Reads a 32bit integer at the index. - */ - public static int read32bit(byte[] code, int index) { - return (code[index] << 24) | ((code[index + 1] & 0xff) << 16) - | ((code[index + 2] & 0xff) << 8) | (code[index + 3] & 0xff); - } - - /** - * Writes a 32bit integer at the index. - */ - public static void write32bit(int value, byte[] code, int index) { - code[index] = (byte)(value >>> 24); - code[index + 1] = (byte)(value >>> 16); - code[index + 2] = (byte)(value >>> 8); - code[index + 3] = (byte)value; - } - - /** - * Copies a 32bit integer. - * - * @param src the source byte array. - * @param isrc the index into the source byte array. - * @param dest the destination byte array. - * @param idest the index into the destination byte array. - */ - static void copy32bit(byte[] src, int isrc, byte[] dest, int idest) { - dest[idest] = src[isrc]; - dest[idest + 1] = src[isrc + 1]; - dest[idest + 2] = src[isrc + 2]; - dest[idest + 3] = src[isrc + 3]; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ByteStream.java b/src/com/wenshuo/agent/javassist/bytecode/ByteStream.java deleted file mode 100644 index 7206ea7..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ByteStream.java +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.OutputStream; -import java.io.IOException; - -final class ByteStream extends OutputStream { - private byte[] buf; - private int count; - - public ByteStream() { this(32); } - - public ByteStream(int size) { - buf = new byte[size]; - count = 0; - } - - public int getPos() { return count; } - public int size() { return count; } - - public void writeBlank(int len) { - enlarge(len); - count += len; - } - - public void write(byte[] data) { - write(data, 0, data.length); - } - - public void write(byte[] data, int off, int len) { - enlarge(len); - System.arraycopy(data, off, buf, count, len); - count += len; - } - - public void write(int b) { - enlarge(1); - int oldCount = count; - buf[oldCount] = (byte)b; - count = oldCount + 1; - } - - public void writeShort(int s) { - enlarge(2); - int oldCount = count; - buf[oldCount] = (byte)(s >>> 8); - buf[oldCount + 1] = (byte)s; - count = oldCount + 2; - } - - public void writeInt(int i) { - enlarge(4); - int oldCount = count; - buf[oldCount] = (byte)(i >>> 24); - buf[oldCount + 1] = (byte)(i >>> 16); - buf[oldCount + 2] = (byte)(i >>> 8); - buf[oldCount + 3] = (byte)i; - count = oldCount + 4; - } - - public void writeLong(long i) { - enlarge(8); - int oldCount = count; - buf[oldCount] = (byte)(i >>> 56); - buf[oldCount + 1] = (byte)(i >>> 48); - buf[oldCount + 2] = (byte)(i >>> 40); - buf[oldCount + 3] = (byte)(i >>> 32); - buf[oldCount + 4] = (byte)(i >>> 24); - buf[oldCount + 5] = (byte)(i >>> 16); - buf[oldCount + 6] = (byte)(i >>> 8); - buf[oldCount + 7] = (byte)i; - count = oldCount + 8; - } - - public void writeFloat(float v) { - writeInt(Float.floatToIntBits(v)); - } - - public void writeDouble(double v) { - writeLong(Double.doubleToLongBits(v)); - } - - public void writeUTF(String s) { - int sLen = s.length(); - int pos = count; - enlarge(sLen + 2); - - byte[] buffer = buf; - buffer[pos++] = (byte)(sLen >>> 8); - buffer[pos++] = (byte)sLen; - for (int i = 0; i < sLen; ++i) { - char c = s.charAt(i); - if (0x01 <= c && c <= 0x7f) - buffer[pos++] = (byte)c; - else { - writeUTF2(s, sLen, i); - return; - } - } - - count = pos; - } - - private void writeUTF2(String s, int sLen, int offset) { - int size = sLen; - for (int i = offset; i < sLen; i++) { - int c = s.charAt(i); - if (c > 0x7ff) - size += 2; // 3 bytes code - else if (c == 0 || c > 0x7f) - ++size; // 2 bytes code - } - - if (size > 65535) - throw new RuntimeException( - "encoded string too long: " + sLen + size + " bytes"); - - enlarge(size + 2); - int pos = count; - byte[] buffer = buf; - buffer[pos] = (byte)(size >>> 8); - buffer[pos + 1] = (byte)size; - pos += 2 + offset; - for (int j = offset; j < sLen; ++j) { - int c = s.charAt(j); - if (0x01 <= c && c <= 0x7f) - buffer[pos++] = (byte) c; - else if (c > 0x07ff) { - buffer[pos] = (byte)(0xe0 | ((c >> 12) & 0x0f)); - buffer[pos + 1] = (byte)(0x80 | ((c >> 6) & 0x3f)); - buffer[pos + 2] = (byte)(0x80 | (c & 0x3f)); - pos += 3; - } - else { - buffer[pos] = (byte)(0xc0 | ((c >> 6) & 0x1f)); - buffer[pos + 1] = (byte)(0x80 | (c & 0x3f)); - pos += 2; - } - } - - count = pos; - } - - public void write(int pos, int value) { - buf[pos] = (byte)value; - } - - public void writeShort(int pos, int value) { - buf[pos] = (byte)(value >>> 8); - buf[pos + 1] = (byte)value; - } - - public void writeInt(int pos, int value) { - buf[pos] = (byte)(value >>> 24); - buf[pos + 1] = (byte)(value >>> 16); - buf[pos + 2] = (byte)(value >>> 8); - buf[pos + 3] = (byte)value; - } - - public byte[] toByteArray() { - byte[] buf2 = new byte[count]; - System.arraycopy(buf, 0, buf2, 0, count); - return buf2; - } - - public void writeTo(OutputStream out) throws IOException { - out.write(buf, 0, count); - } - - public void enlarge(int delta) { - int newCount = count + delta; - if (newCount > buf.length) { - int newLen = buf.length << 1; - byte[] newBuf = new byte[newLen > newCount ? newLen : newCount]; - System.arraycopy(buf, 0, newBuf, 0, count); - buf = newBuf; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/Bytecode.java b/src/com/wenshuo/agent/javassist/bytecode/Bytecode.java deleted file mode 100644 index e04a85f..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/Bytecode.java +++ /dev/null @@ -1,1459 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtPrimitiveType; - -class ByteVector implements Cloneable { - private byte[] buffer; - private int size; - - public ByteVector() { - buffer = new byte[64]; - size = 0; - } - - public Object clone() throws CloneNotSupportedException { - ByteVector bv = (ByteVector)super.clone(); - bv.buffer = (byte[])buffer.clone(); - return bv; - } - - public final int getSize() { return size; } - - public final byte[] copy() { - byte[] b = new byte[size]; - System.arraycopy(buffer, 0, b, 0, size); - return b; - } - - public int read(int offset) { - if (offset < 0 || size <= offset) - throw new ArrayIndexOutOfBoundsException(offset); - - return buffer[offset]; - } - - public void write(int offset, int value) { - if (offset < 0 || size <= offset) - throw new ArrayIndexOutOfBoundsException(offset); - - buffer[offset] = (byte)value; - } - - public void add(int code) { - addGap(1); - buffer[size - 1] = (byte)code; - } - - public void add(int b1, int b2) { - addGap(2); - buffer[size - 2] = (byte)b1; - buffer[size - 1] = (byte)b2; - } - - public void add(int b1, int b2, int b3, int b4) { - addGap(4); - buffer[size - 4] = (byte)b1; - buffer[size - 3] = (byte)b2; - buffer[size - 2] = (byte)b3; - buffer[size - 1] = (byte)b4; - } - - public void addGap(int length) { - if (size + length > buffer.length) { - int newSize = size << 1; - if (newSize < size + length) - newSize = size + length; - - byte[] newBuf = new byte[newSize]; - System.arraycopy(buffer, 0, newBuf, 0, size); - buffer = newBuf; - } - - size += length; - } -} - -/** - * A utility class for producing a bytecode sequence. - * - *

A Bytecode object is an unbounded array - * containing bytecode. For example, - * - * 

- * ConstPool cp = ...;    // constant pool table
- * Bytecode b = new Bytecode(cp, 1, 0);
- * b.addIconst(3);
- * b.addReturn(CtClass.intType);
- * CodeAttribute ca = b.toCodeAttribute();
- * - *

This program produces a Code attribute including a bytecode - * sequence: - * - * 

- * iconst_3
- * ireturn
- * - * @see ConstPool - * @see CodeAttribute - */ -public class Bytecode extends ByteVector implements Cloneable, Opcode { - /** - * Represents the CtClass file using the - * constant pool table given to this Bytecode object. - */ - public static final CtClass THIS = ConstPool.THIS; - - ConstPool constPool; - int maxStack, maxLocals; - ExceptionTable tryblocks; - private int stackDepth; - - /** - * Constructs a Bytecode object with an empty bytecode - * sequence. - * - *

The parameters stacksize and localvars - * specify initial values - * of max_stack and max_locals. - * They can be changed later. - * - * @param cp constant pool table. - * @param stacksize max_stack. - * @param localvars max_locals. - */ - public Bytecode(ConstPool cp, int stacksize, int localvars) { - constPool = cp; - maxStack = stacksize; - maxLocals = localvars; - tryblocks = new ExceptionTable(cp); - stackDepth = 0; - } - - /** - * Constructs a Bytecode object with an empty bytecode - * sequence. The initial values of max_stack and - * max_locals are zero. - * - * @param cp constant pool table. - * @see Bytecode#setMaxStack(int) - * @see Bytecode#setMaxLocals(int) - */ - public Bytecode(ConstPool cp) { - this(cp, 0, 0); - } - - /** - * Creates and returns a copy of this object. - * The constant pool object is shared between this object - * and the cloned object. - */ - public Object clone() { - try { - Bytecode bc = (Bytecode)super.clone(); - bc.tryblocks = (ExceptionTable)tryblocks.clone(); - return bc; - } - catch (CloneNotSupportedException cnse) { - throw new RuntimeException(cnse); - } - } - - /** - * Gets a constant pool table. - */ - public ConstPool getConstPool() { return constPool; } - - /** - * Returns exception_table. - */ - public ExceptionTable getExceptionTable() { return tryblocks; } - - /** - * Converts to a CodeAttribute. - */ - public CodeAttribute toCodeAttribute() { - return new CodeAttribute(constPool, maxStack, maxLocals, - get(), tryblocks); - } - - /** - * Returns the length of the bytecode sequence. - */ - public int length() { - return getSize(); - } - - /** - * Returns the produced bytecode sequence. - */ - public byte[] get() { - return copy(); - } - - /** - * Gets max_stack. - */ - public int getMaxStack() { return maxStack; } - - /** - * Sets max_stack. - * - *

This value may be automatically updated when an instruction - * is appended. A Bytecode object maintains the current - * stack depth whenever an instruction is added - * by addOpcode(). For example, if DUP is appended, - * the current stack depth is increased by one. If the new stack - * depth is more than max_stack, then it is assigned - * to max_stack. However, if branch instructions are - * appended, the current stack depth may not be correctly maintained. - * - * @see #addOpcode(int) - */ - public void setMaxStack(int size) { - maxStack = size; - } - - /** - * Gets max_locals. - */ - public int getMaxLocals() { return maxLocals; } - - /** - * Sets max_locals. - */ - public void setMaxLocals(int size) { - maxLocals = size; - } - - /** - * Sets max_locals. - * - *

This computes the number of local variables - * used to pass method parameters and sets max_locals - * to that number plus locals. - * - * @param isStatic true if params must be - * interpreted as parameters to a static method. - * @param params parameter types. - * @param locals the number of local variables excluding - * ones used to pass parameters. - */ - public void setMaxLocals(boolean isStatic, CtClass[] params, - int locals) { - if (!isStatic) - ++locals; - - if (params != null) { - CtClass doubleType = CtClass.doubleType; - CtClass longType = CtClass.longType; - int n = params.length; - for (int i = 0; i < n; ++i) { - CtClass type = params[i]; - if (type == doubleType || type == longType) - locals += 2; - else - ++locals; - } - } - - maxLocals = locals; - } - - /** - * Increments max_locals. - */ - public void incMaxLocals(int diff) { - maxLocals += diff; - } - - /** - * Adds a new entry of exception_table. - */ - public void addExceptionHandler(int start, int end, - int handler, CtClass type) { - addExceptionHandler(start, end, handler, - constPool.addClassInfo(type)); - } - - /** - * Adds a new entry of exception_table. - * - * @param type the fully-qualified name of a throwable class. - */ - public void addExceptionHandler(int start, int end, - int handler, String type) { - addExceptionHandler(start, end, handler, - constPool.addClassInfo(type)); - } - - /** - * Adds a new entry of exception_table. - */ - public void addExceptionHandler(int start, int end, - int handler, int type) { - tryblocks.add(start, end, handler, type); - } - - /** - * Returns the length of bytecode sequence - * that have been added so far. - */ - public int currentPc() { - return getSize(); - } - - /** - * Reads a signed 8bit value at the offset from the beginning of the - * bytecode sequence. - * - * @throws ArrayIndexOutOfBoundsException if offset is invalid. - */ - public int read(int offset) { - return super.read(offset); - } - - /** - * Reads a signed 16bit value at the offset from the beginning of the - * bytecode sequence. - */ - public int read16bit(int offset) { - int v1 = read(offset); - int v2 = read(offset + 1); - return (v1 << 8) + (v2 & 0xff); - } - - /** - * Reads a signed 32bit value at the offset from the beginning of the - * bytecode sequence. - */ - public int read32bit(int offset) { - int v1 = read16bit(offset); - int v2 = read16bit(offset + 2); - return (v1 << 16) + (v2 & 0xffff); - } - - /** - * Writes an 8bit value at the offset from the beginning of the - * bytecode sequence. - * - * @throws ArrayIndexOutOfBoundsException if offset is invalid. - */ - public void write(int offset, int value) { - super.write(offset, value); - } - - /** - * Writes an 16bit value at the offset from the beginning of the - * bytecode sequence. - */ - public void write16bit(int offset, int value) { - write(offset, value >> 8); - write(offset + 1, value); - } - - /** - * Writes an 32bit value at the offset from the beginning of the - * bytecode sequence. - */ - public void write32bit(int offset, int value) { - write16bit(offset, value >> 16); - write16bit(offset + 2, value); - } - - /** - * Appends an 8bit value to the end of the bytecode sequence. - */ - public void add(int code) { - super.add(code); - } - - /** - * Appends a 32bit value to the end of the bytecode sequence. - */ - public void add32bit(int value) { - add(value >> 24, value >> 16, value >> 8, value); - } - - /** - * Appends the length-byte gap to the end of the bytecode sequence. - * - * @param length the gap length in byte. - */ - public void addGap(int length) { - super.addGap(length); - } - - /** - * Appends an 8bit opcode to the end of the bytecode sequence. - * The current stack depth is updated. - * max_stack is updated if the current stack depth - * is the deepest so far. - * - *

Note: some instructions such as INVOKEVIRTUAL does not - * update the current stack depth since the increment depends - * on the method signature. - * growStack() must be explicitly called. - */ - public void addOpcode(int code) { - add(code); - growStack(STACK_GROW[code]); - } - - /** - * Increases the current stack depth. - * It also updates max_stack if the current stack depth - * is the deepest so far. - * - * @param diff the number added to the current stack depth. - */ - public void growStack(int diff) { - setStackDepth(stackDepth + diff); - } - - /** - * Returns the current stack depth. - */ - public int getStackDepth() { return stackDepth; } - - /** - * Sets the current stack depth. - * It also updates max_stack if the current stack depth - * is the deepest so far. - * - * @param depth new value. - */ - public void setStackDepth(int depth) { - stackDepth = depth; - if (stackDepth > maxStack) - maxStack = stackDepth; - } - - /** - * Appends a 16bit value to the end of the bytecode sequence. - * It never changes the current stack depth. - */ - public void addIndex(int index) { - add(index >> 8, index); - } - - /** - * Appends ALOAD or (WIDE) ALOAD_<n> - * - * @param n an index into the local variable array. - */ - public void addAload(int n) { - if (n < 4) - addOpcode(42 + n); // aload_ - else if (n < 0x100) { - addOpcode(ALOAD); // aload - add(n); - } - else { - addOpcode(WIDE); - addOpcode(ALOAD); - addIndex(n); - } - } - - /** - * Appends ASTORE or (WIDE) ASTORE_<n> - * - * @param n an index into the local variable array. - */ - public void addAstore(int n) { - if (n < 4) - addOpcode(75 + n); // astore_ - else if (n < 0x100) { - addOpcode(ASTORE); // astore - add(n); - } - else { - addOpcode(WIDE); - addOpcode(ASTORE); - addIndex(n); - } - } - - /** - * Appends ICONST or ICONST_<n> - * - * @param n the pushed integer constant. - */ - public void addIconst(int n) { - if (n < 6 && -2 < n) - addOpcode(3 + n); // iconst_ -1..5 - else if (n <= 127 && -128 <= n) { - addOpcode(16); // bipush - add(n); - } - else if (n <= 32767 && -32768 <= n) { - addOpcode(17); // sipush - add(n >> 8); - add(n); - } - else - addLdc(constPool.addIntegerInfo(n)); - } - - /** - * Appends an instruction for pushing zero or null on the stack. - * If the type is void, this method does not append any instruction. - * - * @param type the type of the zero value (or null). - */ - public void addConstZero(CtClass type) { - if (type.isPrimitive()) { - if (type == CtClass.longType) - addOpcode(LCONST_0); - else if (type == CtClass.floatType) - addOpcode(FCONST_0); - else if (type == CtClass.doubleType) - addOpcode(DCONST_0); - else if (type == CtClass.voidType) - throw new RuntimeException("void type?"); - else - addOpcode(ICONST_0); - } - else - addOpcode(ACONST_NULL); - } - - /** - * Appends ILOAD or (WIDE) ILOAD_<n> - * - * @param n an index into the local variable array. - */ - public void addIload(int n) { - if (n < 4) - addOpcode(26 + n); // iload_ - else if (n < 0x100) { - addOpcode(ILOAD); // iload - add(n); - } - else { - addOpcode(WIDE); - addOpcode(ILOAD); - addIndex(n); - } - } - - /** - * Appends ISTORE or (WIDE) ISTORE_<n> - * - * @param n an index into the local variable array. - */ - public void addIstore(int n) { - if (n < 4) - addOpcode(59 + n); // istore_ - else if (n < 0x100) { - addOpcode(ISTORE); // istore - add(n); - } - else { - addOpcode(WIDE); - addOpcode(ISTORE); - addIndex(n); - } - } - - /** - * Appends LCONST or LCONST_<n> - * - * @param n the pushed long integer constant. - */ - public void addLconst(long n) { - if (n == 0 || n == 1) - addOpcode(9 + (int)n); // lconst_ - else - addLdc2w(n); - } - - /** - * Appends LLOAD or (WIDE) LLOAD_<n> - * - * @param n an index into the local variable array. - */ - public void addLload(int n) { - if (n < 4) - addOpcode(30 + n); // lload_ - else if (n < 0x100) { - addOpcode(LLOAD); // lload - add(n); - } - else { - addOpcode(WIDE); - addOpcode(LLOAD); - addIndex(n); - } - } - - /** - * Appends LSTORE or LSTORE_<n> - * - * @param n an index into the local variable array. - */ - public void addLstore(int n) { - if (n < 4) - addOpcode(63 + n); // lstore_ - else if (n < 0x100) { - addOpcode(LSTORE); // lstore - add(n); - } - else { - addOpcode(WIDE); - addOpcode(LSTORE); - addIndex(n); - } - } - - /** - * Appends DCONST or DCONST_<n> - * - * @param d the pushed double constant. - */ - public void addDconst(double d) { - if (d == 0.0 || d == 1.0) - addOpcode(14 + (int)d); // dconst_ - else - addLdc2w(d); - } - - /** - * Appends DLOAD or (WIDE) DLOAD_<n> - * - * @param n an index into the local variable array. - */ - public void addDload(int n) { - if (n < 4) - addOpcode(38 + n); // dload_ - else if (n < 0x100) { - addOpcode(DLOAD); // dload - add(n); - } - else { - addOpcode(WIDE); - addOpcode(DLOAD); - addIndex(n); - } - } - - /** - * Appends DSTORE or (WIDE) DSTORE_<n> - * - * @param n an index into the local variable array. - */ - public void addDstore(int n) { - if (n < 4) - addOpcode(71 + n); // dstore_ - else if (n < 0x100) { - addOpcode(DSTORE); // dstore - add(n); - } - else { - addOpcode(WIDE); - addOpcode(DSTORE); - addIndex(n); - } - } - - /** - * Appends FCONST or FCONST_<n> - * - * @param f the pushed float constant. - */ - public void addFconst(float f) { - if (f == 0.0f || f == 1.0f || f == 2.0f) - addOpcode(11 + (int)f); // fconst_ - else - addLdc(constPool.addFloatInfo(f)); - } - - /** - * Appends FLOAD or (WIDE) FLOAD_<n> - * - * @param n an index into the local variable array. - */ - public void addFload(int n) { - if (n < 4) - addOpcode(34 + n); // fload_ - else if (n < 0x100) { - addOpcode(FLOAD); // fload - add(n); - } - else { - addOpcode(WIDE); - addOpcode(FLOAD); - addIndex(n); - } - } - - /** - * Appends FSTORE or FSTORE_<n> - * - * @param n an index into the local variable array. - */ - public void addFstore(int n) { - if (n < 4) - addOpcode(67 + n); // fstore_ - else if (n < 0x100) { - addOpcode(FSTORE); // fstore - add(n); - } - else { - addOpcode(WIDE); - addOpcode(FSTORE); - addIndex(n); - } - } - - /** - * Appends an instruction for loading a value from the - * local variable at the index n. - * - * @param n the index. - * @param type the type of the loaded value. - * @return the size of the value (1 or 2 word). - */ - public int addLoad(int n, CtClass type) { - if (type.isPrimitive()) { - if (type == CtClass.booleanType || type == CtClass.charType - || type == CtClass.byteType || type == CtClass.shortType - || type == CtClass.intType) - addIload(n); - else if (type == CtClass.longType) { - addLload(n); - return 2; - } - else if(type == CtClass.floatType) - addFload(n); - else if(type == CtClass.doubleType) { - addDload(n); - return 2; - } - else - throw new RuntimeException("void type?"); - } - else - addAload(n); - - return 1; - } - - /** - * Appends an instruction for storing a value into the - * local variable at the index n. - * - * @param n the index. - * @param type the type of the stored value. - * @return 2 if the type is long or double. Otherwise 1. - */ - public int addStore(int n, CtClass type) { - if (type.isPrimitive()) { - if (type == CtClass.booleanType || type == CtClass.charType - || type == CtClass.byteType || type == CtClass.shortType - || type == CtClass.intType) - addIstore(n); - else if (type == CtClass.longType) { - addLstore(n); - return 2; - } - else if (type == CtClass.floatType) - addFstore(n); - else if (type == CtClass.doubleType) { - addDstore(n); - return 2; - } - else - throw new RuntimeException("void type?"); - } - else - addAstore(n); - - return 1; - } - - /** - * Appends instructions for loading all the parameters onto the - * operand stack. - * - * @param offset the index of the first parameter. It is 0 - * if the method is static. Otherwise, it is 1. - */ - public int addLoadParameters(CtClass[] params, int offset) { - int stacksize = 0; - if (params != null) { - int n = params.length; - for (int i = 0; i < n; ++i) - stacksize += addLoad(stacksize + offset, params[i]); - } - - return stacksize; - } - - /** - * Appends CHECKCAST. - * - * @param c the type. - */ - public void addCheckcast(CtClass c) { - addOpcode(CHECKCAST); - addIndex(constPool.addClassInfo(c)); - } - - /** - * Appends CHECKCAST. - * - * @param classname a fully-qualified class name. - */ - public void addCheckcast(String classname) { - addOpcode(CHECKCAST); - addIndex(constPool.addClassInfo(classname)); - } - - /** - * Appends INSTANCEOF. - * - * @param classname the class name. - */ - public void addInstanceof(String classname) { - addOpcode(INSTANCEOF); - addIndex(constPool.addClassInfo(classname)); - } - - /** - * Appends GETFIELD. - * - * @param c the class. - * @param name the field name. - * @param type the descriptor of the field type. - * - * @see Descriptor#of(CtClass) - */ - public void addGetfield(CtClass c, String name, String type) { - add(GETFIELD); - int ci = constPool.addClassInfo(c); - addIndex(constPool.addFieldrefInfo(ci, name, type)); - growStack(Descriptor.dataSize(type) - 1); - } - - /** - * Appends GETFIELD. - * - * @param c the fully-qualified class name. - * @param name the field name. - * @param type the descriptor of the field type. - * - * @see Descriptor#of(CtClass) - */ - public void addGetfield(String c, String name, String type) { - add(GETFIELD); - int ci = constPool.addClassInfo(c); - addIndex(constPool.addFieldrefInfo(ci, name, type)); - growStack(Descriptor.dataSize(type) - 1); - } - - /** - * Appends GETSTATIC. - * - * @param c the class - * @param name the field name - * @param type the descriptor of the field type. - * - * @see Descriptor#of(CtClass) - */ - public void addGetstatic(CtClass c, String name, String type) { - add(GETSTATIC); - int ci = constPool.addClassInfo(c); - addIndex(constPool.addFieldrefInfo(ci, name, type)); - growStack(Descriptor.dataSize(type)); - } - - /** - * Appends GETSTATIC. - * - * @param c the fully-qualified class name - * @param name the field name - * @param type the descriptor of the field type. - * - * @see Descriptor#of(CtClass) - */ - public void addGetstatic(String c, String name, String type) { - add(GETSTATIC); - int ci = constPool.addClassInfo(c); - addIndex(constPool.addFieldrefInfo(ci, name, type)); - growStack(Descriptor.dataSize(type)); - } - - /** - * Appends INVOKESPECIAL. - * - * @param clazz the target class. - * @param name the method name. - * @param returnType the return type. - * @param paramTypes the parameter types. - */ - public void addInvokespecial(CtClass clazz, String name, - CtClass returnType, CtClass[] paramTypes) { - String desc = Descriptor.ofMethod(returnType, paramTypes); - addInvokespecial(clazz, name, desc); - } - - /** - * Appends INVOKESPECIAL. - * - * @param clazz the target class. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - * @see Descriptor#ofConstructor(CtClass[]) - */ - public void addInvokespecial(CtClass clazz, String name, String desc) { - boolean isInterface = clazz == null ? false : clazz.isInterface(); - addInvokespecial(isInterface, - constPool.addClassInfo(clazz), name, desc); - } - - /** - * Appends INVOKESPECIAL. The invoked method must not be a default - * method declared in an interface. - * - * @param clazz the fully-qualified class name. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - * @see Descriptor#ofConstructor(CtClass[]) - */ - public void addInvokespecial(String clazz, String name, String desc) { - addInvokespecial(false, constPool.addClassInfo(clazz), name, desc); - } - - /** - * Appends INVOKESPECIAL. The invoked method must not be a default - * method declared in an interface. - * - * @param clazz the index of CONSTANT_Class_info - * structure. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - * @see Descriptor#ofConstructor(CtClass[]) - */ - public void addInvokespecial(int clazz, String name, String desc) { - addInvokespecial(false, clazz, name, desc); - } - - /** - * Appends INVOKESPECIAL. - * - * @param isInterface true if the invoked method is a default method - * declared in an interface. - * @param clazz the index of CONSTANT_Class_info - * structure. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - * @see Descriptor#ofConstructor(CtClass[]) - */ - public void addInvokespecial(boolean isInterface, int clazz, String name, String desc) { - add(INVOKESPECIAL); - int index; - if (isInterface) - index = constPool.addInterfaceMethodrefInfo(clazz, name, desc); - else - index = constPool.addMethodrefInfo(clazz, name, desc); - - addIndex(index); - growStack(Descriptor.dataSize(desc) - 1); - } - - /** - * Appends INVOKESTATIC. - * - * @param clazz the target class. - * @param name the method name - * @param returnType the return type. - * @param paramTypes the parameter types. - */ - public void addInvokestatic(CtClass clazz, String name, - CtClass returnType, CtClass[] paramTypes) { - String desc = Descriptor.ofMethod(returnType, paramTypes); - addInvokestatic(clazz, name, desc); - } - - /** - * Appends INVOKESTATIC. - * - * @param clazz the target class. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokestatic(CtClass clazz, String name, String desc) { - addInvokestatic(constPool.addClassInfo(clazz), name, desc); - } - - /** - * Appends INVOKESTATIC. - * - * @param classname the fully-qualified class name. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokestatic(String classname, String name, String desc) { - addInvokestatic(constPool.addClassInfo(classname), name, desc); - } - - /** - * Appends INVOKESTATIC. - * - * @param clazz the index of CONSTANT_Class_info - * structure. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokestatic(int clazz, String name, String desc) { - add(INVOKESTATIC); - addIndex(constPool.addMethodrefInfo(clazz, name, desc)); - growStack(Descriptor.dataSize(desc)); - } - - /** - * Appends INVOKEVIRTUAL. - * - *

The specified method must not be an inherited method. - * It must be directly declared in the class specified - * in clazz. - * - * @param clazz the target class. - * @param name the method name - * @param returnType the return type. - * @param paramTypes the parameter types. - */ - public void addInvokevirtual(CtClass clazz, String name, - CtClass returnType, CtClass[] paramTypes) { - String desc = Descriptor.ofMethod(returnType, paramTypes); - addInvokevirtual(clazz, name, desc); - } - - /** - * Appends INVOKEVIRTUAL. - * - *

The specified method must not be an inherited method. - * It must be directly declared in the class specified - * in clazz. - * - * @param clazz the target class. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokevirtual(CtClass clazz, String name, String desc) { - addInvokevirtual(constPool.addClassInfo(clazz), name, desc); - } - - /** - * Appends INVOKEVIRTUAL. - * - *

The specified method must not be an inherited method. - * It must be directly declared in the class specified - * in classname. - * - * @param classname the fully-qualified class name. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokevirtual(String classname, String name, String desc) { - addInvokevirtual(constPool.addClassInfo(classname), name, desc); - } - - /** - * Appends INVOKEVIRTUAL. - * - *

The specified method must not be an inherited method. - * It must be directly declared in the class specified - * by clazz. - * - * @param clazz the index of CONSTANT_Class_info - * structure. - * @param name the method name - * @param desc the descriptor of the method signature. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokevirtual(int clazz, String name, String desc) { - add(INVOKEVIRTUAL); - addIndex(constPool.addMethodrefInfo(clazz, name, desc)); - growStack(Descriptor.dataSize(desc) - 1); - } - - /** - * Appends INVOKEINTERFACE. - * - * @param clazz the target class. - * @param name the method name - * @param returnType the return type. - * @param paramTypes the parameter types. - * @param count the count operand of the instruction. - */ - public void addInvokeinterface(CtClass clazz, String name, - CtClass returnType, CtClass[] paramTypes, - int count) { - String desc = Descriptor.ofMethod(returnType, paramTypes); - addInvokeinterface(clazz, name, desc, count); - } - - /** - * Appends INVOKEINTERFACE. - * - * @param clazz the target class. - * @param name the method name - * @param desc the descriptor of the method signature. - * @param count the count operand of the instruction. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokeinterface(CtClass clazz, String name, - String desc, int count) { - addInvokeinterface(constPool.addClassInfo(clazz), name, desc, - count); - } - - /** - * Appends INVOKEINTERFACE. - * - * @param classname the fully-qualified class name. - * @param name the method name - * @param desc the descriptor of the method signature. - * @param count the count operand of the instruction. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokeinterface(String classname, String name, - String desc, int count) { - addInvokeinterface(constPool.addClassInfo(classname), name, desc, - count); - } - - /** - * Appends INVOKEINTERFACE. - * - * @param clazz the index of CONSTANT_Class_info - * structure. - * @param name the method name - * @param desc the descriptor of the method signature. - * @param count the count operand of the instruction. - * - * @see Descriptor#ofMethod(CtClass,CtClass[]) - */ - public void addInvokeinterface(int clazz, String name, - String desc, int count) { - add(INVOKEINTERFACE); - addIndex(constPool.addInterfaceMethodrefInfo(clazz, name, desc)); - add(count); - add(0); - growStack(Descriptor.dataSize(desc) - 1); - } - - /** - * Appends INVOKEDYNAMIC. - * - * @param bootstrap an index into the bootstrap_methods array - * of the bootstrap method table. - * @param name the method name. - * @param desc the method descriptor. - * @see Descriptor#ofMethod(CtClass,CtClass[]) - * @since 3.17 - */ - public void addInvokedynamic(int bootstrap, String name, String desc) { - int nt = constPool.addNameAndTypeInfo(name, desc); - int dyn = constPool.addInvokeDynamicInfo(bootstrap, nt); - add(INVOKEDYNAMIC); - addIndex(dyn); - add(0, 0); - growStack(Descriptor.dataSize(desc)); // assume ConstPool#REF_invokeStatic - } - - /** - * Appends LDC or LDC_W. The pushed item is a String - * object. - * - * @param s the character string pushed by LDC or LDC_W. - */ - public void addLdc(String s) { - addLdc(constPool.addStringInfo(s)); - } - - /** - * Appends LDC or LDC_W. - * - * @param i index into the constant pool. - */ - public void addLdc(int i) { - if (i > 0xFF) { - addOpcode(LDC_W); - addIndex(i); - } - else { - addOpcode(LDC); - add(i); - } - } - - /** - * Appends LDC2_W. The pushed item is a long value. - */ - public void addLdc2w(long l) { - addOpcode(LDC2_W); - addIndex(constPool.addLongInfo(l)); - } - - /** - * Appends LDC2_W. The pushed item is a double value. - */ - public void addLdc2w(double d) { - addOpcode(LDC2_W); - addIndex(constPool.addDoubleInfo(d)); - } - - /** - * Appends NEW. - * - * @param clazz the class of the created instance. - */ - public void addNew(CtClass clazz) { - addOpcode(NEW); - addIndex(constPool.addClassInfo(clazz)); - } - - /** - * Appends NEW. - * - * @param classname the fully-qualified class name. - */ - public void addNew(String classname) { - addOpcode(NEW); - addIndex(constPool.addClassInfo(classname)); - } - - /** - * Appends ANEWARRAY. - * - * @param classname the qualified class name of the element type. - */ - public void addAnewarray(String classname) { - addOpcode(ANEWARRAY); - addIndex(constPool.addClassInfo(classname)); - } - - /** - * Appends ICONST and ANEWARRAY. - * - * @param clazz the elememnt type. - * @param length the array length. - */ - public void addAnewarray(CtClass clazz, int length) { - addIconst(length); - addOpcode(ANEWARRAY); - addIndex(constPool.addClassInfo(clazz)); - } - - /** - * Appends NEWARRAY for primitive types. - * - * @param atype T_BOOLEAN, T_CHAR, ... - * @see Opcode - */ - public void addNewarray(int atype, int length) { - addIconst(length); - addOpcode(NEWARRAY); - add(atype); - } - - /** - * Appends MULTINEWARRAY. - * - * @param clazz the array type. - * @param dimensions the sizes of all dimensions. - * @return the length of dimensions. - */ - public int addMultiNewarray(CtClass clazz, int[] dimensions) { - int len = dimensions.length; - for (int i = 0; i < len; ++i) - addIconst(dimensions[i]); - - growStack(len); - return addMultiNewarray(clazz, len); - } - - /** - * Appends MULTINEWARRAY. The size of every dimension must have been - * already pushed on the stack. - * - * @param clazz the array type. - * @param dim the number of the dimensions. - * @return the value of dim. - */ - public int addMultiNewarray(CtClass clazz, int dim) { - add(MULTIANEWARRAY); - addIndex(constPool.addClassInfo(clazz)); - add(dim); - growStack(1 - dim); - return dim; - } - - /** - * Appends MULTINEWARRAY. - * - * @param desc the type descriptor of the created array. - * @param dim dimensions. - * @return the value of dim. - */ - public int addMultiNewarray(String desc, int dim) { - add(MULTIANEWARRAY); - addIndex(constPool.addClassInfo(desc)); - add(dim); - growStack(1 - dim); - return dim; - } - - /** - * Appends PUTFIELD. - * - * @param c the target class. - * @param name the field name. - * @param desc the descriptor of the field type. - */ - public void addPutfield(CtClass c, String name, String desc) { - addPutfield0(c, null, name, desc); - } - - /** - * Appends PUTFIELD. - * - * @param classname the fully-qualified name of the target class. - * @param name the field name. - * @param desc the descriptor of the field type. - */ - public void addPutfield(String classname, String name, String desc) { - // if classnaem is null, the target class is THIS. - addPutfield0(null, classname, name, desc); - } - - private void addPutfield0(CtClass target, String classname, - String name, String desc) { - add(PUTFIELD); - // target is null if it represents THIS. - int ci = classname == null ? constPool.addClassInfo(target) - : constPool.addClassInfo(classname); - addIndex(constPool.addFieldrefInfo(ci, name, desc)); - growStack(-1 - Descriptor.dataSize(desc)); - } - - /** - * Appends PUTSTATIC. - * - * @param c the target class. - * @param name the field name. - * @param desc the descriptor of the field type. - */ - public void addPutstatic(CtClass c, String name, String desc) { - addPutstatic0(c, null, name, desc); - } - - /** - * Appends PUTSTATIC. - * - * @param classname the fully-qualified name of the target class. - * @param fieldName the field name. - * @param desc the descriptor of the field type. - */ - public void addPutstatic(String classname, String fieldName, String desc) { - // if classname is null, the target class is THIS. - addPutstatic0(null, classname, fieldName, desc); - } - - private void addPutstatic0(CtClass target, String classname, - String fieldName, String desc) { - add(PUTSTATIC); - // target is null if it represents THIS. - int ci = classname == null ? constPool.addClassInfo(target) - : constPool.addClassInfo(classname); - addIndex(constPool.addFieldrefInfo(ci, fieldName, desc)); - growStack(-Descriptor.dataSize(desc)); - } - - /** - * Appends ARETURN, IRETURN, .., or RETURN. - * - * @param type the return type. - */ - public void addReturn(CtClass type) { - if (type == null) - addOpcode(RETURN); - else if (type.isPrimitive()) { - CtPrimitiveType ptype = (CtPrimitiveType)type; - addOpcode(ptype.getReturnOp()); - } - else - addOpcode(ARETURN); - } - - /** - * Appends RET. - * - * @param var local variable - */ - public void addRet(int var) { - if (var < 0x100) { - addOpcode(RET); - add(var); - } - else { - addOpcode(WIDE); - addOpcode(RET); - addIndex(var); - } - } - - /** - * Appends instructions for executing - * java.lang.System.println(message). - * - * @param message printed message. - */ - public void addPrintln(String message) { - addGetstatic("java.lang.System", "err", "Ljava/io/PrintStream;"); - addLdc(message); - addInvokevirtual("java.io.PrintStream", - "println", "(Ljava/lang/String;)V"); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ClassFile.java b/src/com/wenshuo/agent/javassist/bytecode/ClassFile.java deleted file mode 100644 index 5a6a70c..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ClassFile.java +++ /dev/null @@ -1,932 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.ArrayList; -import java.util.List; -import java.util.ListIterator; -import java.util.Map; - -import com.wenshuo.agent.javassist.CannotCompileException; - -/** - * ClassFile represents a Java .class file, which - * consists of a constant pool, methods, fields, and attributes. - * - *

For example,

- * 
- * ClassFile cf = new ClassFile(false, "test.Foo", null);
- * cf.setInterfaces(new String[] { "java.lang.Cloneable" });
- *
- * FieldInfo f = new FieldInfo(cf.getConstPool(), "width", "I");
- * f.setAccessFlags(AccessFlag.PUBLIC);
- * cf.addField(f);
- *
- * cf.write(new DataOutputStream(new FileOutputStream("Foo.class")));
- *
- *

This code generates a class file Foo.class for the following class:

- * 
- * package test;
- * class Foo implements Cloneable {
- *     public int width;
- * }
- *
- * - * @see FieldInfo - * @see MethodInfo - * @see ClassFileWriter - * @see javassist.CtClass#getClassFile() - * @see javassist.ClassPool#makeClass(ClassFile) - */ -public final class ClassFile { - int major, minor; // version number - ConstPool constPool; - int thisClass; - int accessFlags; - int superClass; - int[] interfaces; - ArrayList fields; - ArrayList methods; - ArrayList attributes; - String thisclassname; // not JVM-internal name - String[] cachedInterfaces; - String cachedSuperclass; - - /** - * The major version number of class files - * for JDK 1.1. - */ - public static final int JAVA_1 = 45; - - /** - * The major version number of class files - * for JDK 1.2. - */ - public static final int JAVA_2 = 46; - - /** - * The major version number of class files - * for JDK 1.3. - */ - public static final int JAVA_3 = 47; - - /** - * The major version number of class files - * for JDK 1.4. - */ - public static final int JAVA_4 = 48; - - /** - * The major version number of class files - * for JDK 1.5. - */ - public static final int JAVA_5 = 49; - - /** - * The major version number of class files - * for JDK 1.6. - */ - public static final int JAVA_6 = 50; - - /** - * The major version number of class files - * for JDK 1.7. - */ - public static final int JAVA_7 = 51; - - /** - * The major version number of class files - * for JDK 1.8. - */ - public static final int JAVA_8 = 52; - - /** - * The major version number of class files created - * from scratch. The default value is 47 (JDK 1.3). - * It is 49 (JDK 1.5) - * if the JVM supports java.lang.StringBuilder. - * It is 50 (JDK 1.6) - * if the JVM supports java.util.zip.DeflaterInputStream. - * It is 51 (JDK 1.7) - * if the JVM supports java.lang.invoke.CallSite. - */ - public static int MAJOR_VERSION = JAVA_3; - - static { - try { - Class.forName("java.lang.StringBuilder"); - MAJOR_VERSION = JAVA_5; - Class.forName("java.util.zip.DeflaterInputStream"); - MAJOR_VERSION = JAVA_6; - Class.forName("java.lang.invoke.CallSite"); - MAJOR_VERSION = JAVA_7; - } - catch (Throwable t) {} - } - - /** - * Constructs a class file from a byte stream. - */ - public ClassFile(DataInputStream in) throws IOException { - read(in); - } - - /** - * Constructs a class file including no members. - * - * @param isInterface - * true if this is an interface. false if this is a class. - * @param classname - * a fully-qualified class name - * @param superclass - * a fully-qualified super class name or null. - */ - public ClassFile(boolean isInterface, String classname, String superclass) { - major = MAJOR_VERSION; - minor = 0; // JDK 1.3 or later - constPool = new ConstPool(classname); - thisClass = constPool.getThisClassInfo(); - if (isInterface) - accessFlags = AccessFlag.INTERFACE | AccessFlag.ABSTRACT; - else - accessFlags = AccessFlag.SUPER; - - initSuperclass(superclass); - interfaces = null; - fields = new ArrayList(); - methods = new ArrayList(); - thisclassname = classname; - - attributes = new ArrayList(); - attributes.add(new SourceFileAttribute(constPool, - getSourcefileName(thisclassname))); - } - - private void initSuperclass(String superclass) { - if (superclass != null) { - this.superClass = constPool.addClassInfo(superclass); - cachedSuperclass = superclass; - } - else { - this.superClass = constPool.addClassInfo("java.lang.Object"); - cachedSuperclass = "java.lang.Object"; - } - } - - private static String getSourcefileName(String qname) { - int index = qname.lastIndexOf('.'); - if (index >= 0) - qname = qname.substring(index + 1); - - return qname + ".java"; - } - - /** - * Eliminates dead constant pool items. If a method or a field is removed, - * the constant pool items used by that method/field become dead items. This - * method recreates a constant pool. - */ - public void compact() { - ConstPool cp = compact0(); - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - minfo.compact(cp); - } - - list = fields; - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - finfo.compact(cp); - } - - attributes = AttributeInfo.copyAll(attributes, cp); - constPool = cp; - } - - private ConstPool compact0() { - ConstPool cp = new ConstPool(thisclassname); - thisClass = cp.getThisClassInfo(); - String sc = getSuperclass(); - if (sc != null) - superClass = cp.addClassInfo(getSuperclass()); - - if (interfaces != null) { - int n = interfaces.length; - for (int i = 0; i < n; ++i) - interfaces[i] - = cp.addClassInfo(constPool.getClassInfo(interfaces[i])); - } - - return cp; - } - - /** - * Discards all attributes, associated with both the class file and the - * members such as a code attribute and exceptions attribute. The unused - * constant pool entries are also discarded (a new packed constant pool is - * constructed). - */ - public void prune() { - ConstPool cp = compact0(); - ArrayList newAttributes = new ArrayList(); - AttributeInfo invisibleAnnotations - = getAttribute(AnnotationsAttribute.invisibleTag); - if (invisibleAnnotations != null) { - invisibleAnnotations = invisibleAnnotations.copy(cp, null); - newAttributes.add(invisibleAnnotations); - } - - AttributeInfo visibleAnnotations - = getAttribute(AnnotationsAttribute.visibleTag); - if (visibleAnnotations != null) { - visibleAnnotations = visibleAnnotations.copy(cp, null); - newAttributes.add(visibleAnnotations); - } - - AttributeInfo signature - = getAttribute(SignatureAttribute.tag); - if (signature != null) { - signature = signature.copy(cp, null); - newAttributes.add(signature); - } - - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - minfo.prune(cp); - } - - list = fields; - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - finfo.prune(cp); - } - - attributes = newAttributes; - constPool = cp; - } - - /** - * Returns a constant pool table. - */ - public ConstPool getConstPool() { - return constPool; - } - - /** - * Returns true if this is an interface. - */ - public boolean isInterface() { - return (accessFlags & AccessFlag.INTERFACE) != 0; - } - - /** - * Returns true if this is a final class or interface. - */ - public boolean isFinal() { - return (accessFlags & AccessFlag.FINAL) != 0; - } - - /** - * Returns true if this is an abstract class or an interface. - */ - public boolean isAbstract() { - return (accessFlags & AccessFlag.ABSTRACT) != 0; - } - - /** - * Returns access flags. - * - * @see javassist.bytecode.AccessFlag - */ - public int getAccessFlags() { - return accessFlags; - } - - /** - * Changes access flags. - * - * @see javassist.bytecode.AccessFlag - */ - public void setAccessFlags(int acc) { - if ((acc & AccessFlag.INTERFACE) == 0) - acc |= AccessFlag.SUPER; - - accessFlags = acc; - } - - /** - * Returns access and property flags of this nested class. - * This method returns -1 if the class is not a nested class. - * - *

The returned value is obtained from inner_class_access_flags - * of the entry representing this nested class itself - * in InnerClasses_attribute. - */ - public int getInnerAccessFlags() { - InnerClassesAttribute ica - = (InnerClassesAttribute)getAttribute(InnerClassesAttribute.tag); - if (ica == null) - return -1; - - String name = getName(); - int n = ica.tableLength(); - for (int i = 0; i < n; ++i) - if (name.equals(ica.innerClass(i))) - return ica.accessFlags(i); - - return -1; - } - - /** - * Returns the class name. - */ - public String getName() { - return thisclassname; - } - - /** - * Sets the class name. This method substitutes the new name for all - * occurrences of the old class name in the class file. - */ - public void setName(String name) { - renameClass(thisclassname, name); - } - - /** - * Returns the super class name. - */ - public String getSuperclass() { - if (cachedSuperclass == null) - cachedSuperclass = constPool.getClassInfo(superClass); - - return cachedSuperclass; - } - - /** - * Returns the index of the constant pool entry representing the super - * class. - */ - public int getSuperclassId() { - return superClass; - } - - /** - * Sets the super class. - * - *

- * The new super class should inherit from the old super class. - * This method modifies constructors so that they call constructors declared - * in the new super class. - */ - public void setSuperclass(String superclass) throws CannotCompileException { - if (superclass == null) - superclass = "java.lang.Object"; - - try { - this.superClass = constPool.addClassInfo(superclass); - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - minfo.setSuperclass(superclass); - } - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - cachedSuperclass = superclass; - } - - /** - * Replaces all occurrences of a class name in the class file. - * - *

- * If class X is substituted for class Y in the class file, X and Y must - * have the same signature. If Y provides a method m(), X must provide it - * even if X inherits m() from the super class. If this fact is not - * guaranteed, the bytecode verifier may cause an error. - * - * @param oldname - * the replaced class name - * @param newname - * the substituted class name - */ - public final void renameClass(String oldname, String newname) { - ArrayList list; - int n; - - if (oldname.equals(newname)) - return; - - if (oldname.equals(thisclassname)) - thisclassname = newname; - - oldname = Descriptor.toJvmName(oldname); - newname = Descriptor.toJvmName(newname); - constPool.renameClass(oldname, newname); - - AttributeInfo.renameClass(attributes, oldname, newname); - list = methods; - n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - String desc = minfo.getDescriptor(); - minfo.setDescriptor(Descriptor.rename(desc, oldname, newname)); - AttributeInfo.renameClass(minfo.getAttributes(), oldname, newname); - } - - list = fields; - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - String desc = finfo.getDescriptor(); - finfo.setDescriptor(Descriptor.rename(desc, oldname, newname)); - AttributeInfo.renameClass(finfo.getAttributes(), oldname, newname); - } - } - - /** - * Replaces all occurrences of several class names in the class file. - * - * @param classnames - * specifies which class name is replaced with which new name. - * Class names must be described with the JVM-internal - * representation like java/lang/Object. - * @see #renameClass(String,String) - */ - public final void renameClass(Map classnames) { - String jvmNewThisName = (String)classnames.get(Descriptor - .toJvmName(thisclassname)); - if (jvmNewThisName != null) - thisclassname = Descriptor.toJavaName(jvmNewThisName); - - constPool.renameClass(classnames); - - AttributeInfo.renameClass(attributes, classnames); - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - String desc = minfo.getDescriptor(); - minfo.setDescriptor(Descriptor.rename(desc, classnames)); - AttributeInfo.renameClass(minfo.getAttributes(), classnames); - } - - list = fields; - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - String desc = finfo.getDescriptor(); - finfo.setDescriptor(Descriptor.rename(desc, classnames)); - AttributeInfo.renameClass(finfo.getAttributes(), classnames); - } - } - - /** - * Internal-use only. - * CtClass.getRefClasses() calls this method. - */ - public final void getRefClasses(Map classnames) { - constPool.renameClass(classnames); - - AttributeInfo.getRefClasses(attributes, classnames); - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - String desc = minfo.getDescriptor(); - Descriptor.rename(desc, classnames); - AttributeInfo.getRefClasses(minfo.getAttributes(), classnames); - } - - list = fields; - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - String desc = finfo.getDescriptor(); - Descriptor.rename(desc, classnames); - AttributeInfo.getRefClasses(finfo.getAttributes(), classnames); - } - } - - /** - * Returns the names of the interfaces implemented by the class. - * The returned array is read only. - */ - public String[] getInterfaces() { - if (cachedInterfaces != null) - return cachedInterfaces; - - String[] rtn = null; - if (interfaces == null) - rtn = new String[0]; - else { - int n = interfaces.length; - String[] list = new String[n]; - for (int i = 0; i < n; ++i) - list[i] = constPool.getClassInfo(interfaces[i]); - - rtn = list; - } - - cachedInterfaces = rtn; - return rtn; - } - - /** - * Sets the interfaces. - * - * @param nameList - * the names of the interfaces. - */ - public void setInterfaces(String[] nameList) { - cachedInterfaces = null; - if (nameList != null) { - int n = nameList.length; - interfaces = new int[n]; - for (int i = 0; i < n; ++i) - interfaces[i] = constPool.addClassInfo(nameList[i]); - } - } - - /** - * Appends an interface to the interfaces implemented by the class. - */ - public void addInterface(String name) { - cachedInterfaces = null; - int info = constPool.addClassInfo(name); - if (interfaces == null) { - interfaces = new int[1]; - interfaces[0] = info; - } - else { - int n = interfaces.length; - int[] newarray = new int[n + 1]; - System.arraycopy(interfaces, 0, newarray, 0, n); - newarray[n] = info; - interfaces = newarray; - } - } - - /** - * Returns all the fields declared in the class. - * - * @return a list of FieldInfo. - * @see FieldInfo - */ - public List getFields() { - return fields; - } - - /** - * Appends a field to the class. - * - * @throws DuplicateMemberException when the field is already included. - */ - public void addField(FieldInfo finfo) throws DuplicateMemberException { - testExistingField(finfo.getName(), finfo.getDescriptor()); - fields.add(finfo); - } - - /** - * Just appends a field to the class. - * It does not check field duplication. - * Use this method only when minimizing performance overheads - * is seriously required. - * - * @since 3.13 - */ - public final void addField2(FieldInfo finfo) { - fields.add(finfo); - } - - private void testExistingField(String name, String descriptor) - throws DuplicateMemberException { - ListIterator it = fields.listIterator(0); - while (it.hasNext()) { - FieldInfo minfo = (FieldInfo)it.next(); - if (minfo.getName().equals(name)) - throw new DuplicateMemberException("duplicate field: " + name); - } - } - - /** - * Returns all the methods declared in the class. - * - * @return a list of MethodInfo. - * @see MethodInfo - */ - public List getMethods() { - return methods; - } - - /** - * Returns the method with the specified name. If there are multiple methods - * with that name, this method returns one of them. - * - * @return null if no such method is found. - */ - public MethodInfo getMethod(String name) { - ArrayList list = methods; - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - if (minfo.getName().equals(name)) - return minfo; - } - - return null; - } - - /** - * Returns a static initializer (class initializer), or null if it does not - * exist. - */ - public MethodInfo getStaticInitializer() { - return getMethod(MethodInfo.nameClinit); - } - - /** - * Appends a method to the class. - * If there is a bridge method with the same name and signature, - * then the bridge method is removed before a new method is added. - * - * @throws DuplicateMemberException when the method is already included. - */ - public void addMethod(MethodInfo minfo) throws DuplicateMemberException { - testExistingMethod(minfo); - methods.add(minfo); - } - - /** - * Just appends a method to the class. - * It does not check method duplication or remove a bridge method. - * Use this method only when minimizing performance overheads - * is seriously required. - * - * @since 3.13 - */ - public final void addMethod2(MethodInfo minfo) { - methods.add(minfo); - } - - private void testExistingMethod(MethodInfo newMinfo) - throws DuplicateMemberException - { - String name = newMinfo.getName(); - String descriptor = newMinfo.getDescriptor(); - ListIterator it = methods.listIterator(0); - while (it.hasNext()) - if (isDuplicated(newMinfo, name, descriptor, (MethodInfo)it.next(), it)) - throw new DuplicateMemberException("duplicate method: " + name - + " in " + this.getName()); - } - - private static boolean isDuplicated(MethodInfo newMethod, String newName, - String newDesc, MethodInfo minfo, - ListIterator it) - { - if (!minfo.getName().equals(newName)) - return false; - - String desc = minfo.getDescriptor(); - if (!Descriptor.eqParamTypes(desc, newDesc)) - return false; - - if (desc.equals(newDesc)) { - if (notBridgeMethod(minfo)) - return true; - else { - // if the bridge method with the same signature - // already exists, replace it. - it.remove(); - return false; - } - } - else - return false; - // return notBridgeMethod(minfo) && notBridgeMethod(newMethod); - } - - /* For a bridge method, see Sec. 15.12.4.5 of JLS 3rd Ed. - */ - private static boolean notBridgeMethod(MethodInfo minfo) { - return (minfo.getAccessFlags() & AccessFlag.BRIDGE) == 0; - } - - /** - * Returns all the attributes. The returned List object - * is shared with this object. If you add a new attribute to the list, - * the attribute is also added to the classs file represented by this - * object. If you remove an attribute from the list, it is also removed - * from the class file. - * - * @return a list of AttributeInfo objects. - * @see AttributeInfo - */ - public List getAttributes() { - return attributes; - } - - /** - * Returns the attribute with the specified name. If there are multiple - * attributes with that name, this method returns either of them. It - * returns null if the specified attributed is not found. - * - * @param name attribute name - * @see #getAttributes() - */ - public AttributeInfo getAttribute(String name) { - ArrayList list = attributes; - int n = list.size(); - for (int i = 0; i < n; ++i) { - AttributeInfo ai = (AttributeInfo)list.get(i); - if (ai.getName().equals(name)) - return ai; - } - - return null; - } - - /** - * Appends an attribute. If there is already an attribute with the same - * name, the new one substitutes for it. - * - * @see #getAttributes() - */ - public void addAttribute(AttributeInfo info) { - AttributeInfo.remove(attributes, info.getName()); - attributes.add(info); - } - - /** - * Returns the source file containing this class. - * - * @return null if this information is not available. - */ - public String getSourceFile() { - SourceFileAttribute sf - = (SourceFileAttribute)getAttribute(SourceFileAttribute.tag); - if (sf == null) - return null; - else - return sf.getFileName(); - } - - private void read(DataInputStream in) throws IOException { - int i, n; - int magic = in.readInt(); - if (magic != 0xCAFEBABE) - throw new IOException("bad magic number: " + Integer.toHexString(magic)); - - minor = in.readUnsignedShort(); - major = in.readUnsignedShort(); - constPool = new ConstPool(in); - accessFlags = in.readUnsignedShort(); - thisClass = in.readUnsignedShort(); - constPool.setThisClassInfo(thisClass); - superClass = in.readUnsignedShort(); - n = in.readUnsignedShort(); - if (n == 0) - interfaces = null; - else { - interfaces = new int[n]; - for (i = 0; i < n; ++i) - interfaces[i] = in.readUnsignedShort(); - } - - ConstPool cp = constPool; - n = in.readUnsignedShort(); - fields = new ArrayList(); - for (i = 0; i < n; ++i) - addField2(new FieldInfo(cp, in)); - - n = in.readUnsignedShort(); - methods = new ArrayList(); - for (i = 0; i < n; ++i) - addMethod2(new MethodInfo(cp, in)); - - attributes = new ArrayList(); - n = in.readUnsignedShort(); - for (i = 0; i < n; ++i) - addAttribute(AttributeInfo.read(cp, in)); - - thisclassname = constPool.getClassInfo(thisClass); - } - - /** - * Writes a class file represented by this object into an output stream. - */ - public void write(DataOutputStream out) throws IOException { - int i, n; - - out.writeInt(0xCAFEBABE); // magic - out.writeShort(minor); // minor version - out.writeShort(major); // major version - constPool.write(out); // constant pool - out.writeShort(accessFlags); - out.writeShort(thisClass); - out.writeShort(superClass); - - if (interfaces == null) - n = 0; - else - n = interfaces.length; - - out.writeShort(n); - for (i = 0; i < n; ++i) - out.writeShort(interfaces[i]); - - ArrayList list = fields; - n = list.size(); - out.writeShort(n); - for (i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - finfo.write(out); - } - - list = methods; - n = list.size(); - out.writeShort(n); - for (i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - minfo.write(out); - } - - out.writeShort(attributes.size()); - AttributeInfo.writeAll(attributes, out); - } - - /** - * Get the Major version. - * - * @return the major version - */ - public int getMajorVersion() { - return major; - } - - /** - * Set the major version. - * - * @param major - * the major version - */ - public void setMajorVersion(int major) { - this.major = major; - } - - /** - * Get the minor version. - * - * @return the minor version - */ - public int getMinorVersion() { - return minor; - } - - /** - * Set the minor version. - * - * @param minor - * the minor version - */ - public void setMinorVersion(int minor) { - this.minor = minor; - } - - /** - * Sets the major and minor version to Java 5. - * - * If the major version is older than 49, Java 5 - * extensions such as annotations are ignored - * by the JVM. - */ - public void setVersionToJava5() { - this.major = 49; - this.minor = 0; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java b/src/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java deleted file mode 100644 index a7bd9c7..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.PrintWriter; -import com.wenshuo.agent.javassist.Modifier; -import java.util.List; - -/** - * A utility class for priting the contents of a class file. - * It prints a constant pool table, fields, and methods in a - * human readable representation. - */ -public class ClassFilePrinter { - /** - * Prints the contents of a class file to the standard output stream. - */ - public static void print(ClassFile cf) { - print(cf, new PrintWriter(System.out, true)); - } - - /** - * Prints the contents of a class file. - */ - public static void print(ClassFile cf, PrintWriter out) { - List list; - int n; - - /* 0x0020 (SYNCHRONIZED) means ACC_SUPER if the modifiers - * are of a class. - */ - int mod - = AccessFlag.toModifier(cf.getAccessFlags() - & ~AccessFlag.SYNCHRONIZED); - out.println("major: " + cf.major + ", minor: " + cf.minor - + " modifiers: " + Integer.toHexString(cf.getAccessFlags())); - out.println(Modifier.toString(mod) + " class " - + cf.getName() + " extends " + cf.getSuperclass()); - - String[] infs = cf.getInterfaces(); - if (infs != null && infs.length > 0) { - out.print(" implements "); - out.print(infs[0]); - for (int i = 1; i < infs.length; ++i) - out.print(", " + infs[i]); - - out.println(); - } - - out.println(); - list = cf.getFields(); - n = list.size(); - for (int i = 0; i < n; ++i) { - FieldInfo finfo = (FieldInfo)list.get(i); - int acc = finfo.getAccessFlags(); - out.println(Modifier.toString(AccessFlag.toModifier(acc)) - + " " + finfo.getName() + "\t" - + finfo.getDescriptor()); - printAttributes(finfo.getAttributes(), out, 'f'); - } - - out.println(); - list = cf.getMethods(); - n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - int acc = minfo.getAccessFlags(); - out.println(Modifier.toString(AccessFlag.toModifier(acc)) - + " " + minfo.getName() + "\t" - + minfo.getDescriptor()); - printAttributes(minfo.getAttributes(), out, 'm'); - out.println(); - } - - out.println(); - printAttributes(cf.getAttributes(), out, 'c'); - } - - static void printAttributes(List list, PrintWriter out, char kind) { - if (list == null) - return; - - int n = list.size(); - for (int i = 0; i < n; ++i) { - AttributeInfo ai = (AttributeInfo)list.get(i); - if (ai instanceof CodeAttribute) { - CodeAttribute ca = (CodeAttribute)ai; - out.println("attribute: " + ai.getName() + ": " - + ai.getClass().getName()); - out.println("max stack " + ca.getMaxStack() - + ", max locals " + ca.getMaxLocals() - + ", " + ca.getExceptionTable().size() - + " catch blocks"); - out.println(""); - printAttributes(ca.getAttributes(), out, kind); - out.println(""); - } - else if (ai instanceof AnnotationsAttribute) { - out.println("annnotation: " + ai.toString()); - } - else if (ai instanceof ParameterAnnotationsAttribute) { - out.println("parameter annnotations: " + ai.toString()); - } - else if (ai instanceof StackMapTable) { - out.println(""); - StackMapTable.Printer.print((StackMapTable)ai, out); - out.println(""); - } - else if (ai instanceof StackMap) { - out.println(""); - ((StackMap)ai).print(out); - out.println(""); - } - else if (ai instanceof SignatureAttribute) { - SignatureAttribute sa = (SignatureAttribute)ai; - String sig = sa.getSignature(); - out.println("signature: " + sig); - try { - String s; - if (kind == 'c') - s = SignatureAttribute.toClassSignature(sig).toString(); - else if (kind == 'm') - s = SignatureAttribute.toMethodSignature(sig).toString(); - else - s = SignatureAttribute.toFieldSignature(sig).toString(); - - out.println(" " + s); - } - catch (BadBytecode e) { - out.println(" syntax error"); - } - } - else - out.println("attribute: " + ai.getName() - + " (" + ai.get().length + " byte): " - + ai.getClass().getName()); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java b/src/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java deleted file mode 100644 index 39ab88b..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java +++ /dev/null @@ -1,791 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.OutputStream; -import java.io.DataOutputStream; -import java.io.ByteArrayOutputStream; -import java.io.IOException; - -/** - * A quick class-file writer. This is useful when a generated - * class file is simple and the code generation should be fast. - * - *

Example: - * - * 

- * ClassFileWriter cfw = new ClassFileWriter(ClassFile.JAVA_4, 0);
- * ConstPoolWriter cpw = cfw.getConstPool();
- *
- * FieldWriter fw = cfw.getFieldWriter();
- * fw.add(AccessFlag.PUBLIC, "value", "I", null);
- * fw.add(AccessFlag.PUBLIC, "value2", "J", null);
- *
- * int thisClass = cpw.addClassInfo("sample/Test");
- * int superClass = cpw.addClassInfo("java/lang/Object");
- *
- * MethodWriter mw = cfw.getMethodWriter();
- *
- * mw.begin(AccessFlag.PUBLIC, MethodInfo.nameInit, "()V", null, null);
- * mw.add(Opcode.ALOAD_0);
- * mw.add(Opcode.INVOKESPECIAL);
- * int signature = cpw.addNameAndTypeInfo(MethodInfo.nameInit, "()V");
- * mw.add16(cpw.addMethodrefInfo(superClass, signature));
- * mw.add(Opcode.RETURN);
- * mw.codeEnd(1, 1);
- * mw.end(null, null);
- *
- * mw.begin(AccessFlag.PUBLIC, "one", "()I", null, null);
- * mw.add(Opcode.ICONST_1);
- * mw.add(Opcode.IRETURN);
- * mw.codeEnd(1, 1);
- * mw.end(null, null);
- *
- * byte[] classfile = cfw.end(AccessFlag.PUBLIC, thisClass, superClass,
- *                            null, null);
- *
- * - *

The code above generates the following class: - * - * 

- * package sample;
- * public class Test {
- *     public int value;
- *     public long value2;
- *     public Test() { super(); }
- *     public one() { return 1; }
- * }
- *
- * - * @since 3.13 - */ -public class ClassFileWriter { - private ByteStream output; - private ConstPoolWriter constPool; - private FieldWriter fields; - private MethodWriter methods; - int thisClass, superClass; - - /** - * Constructs a class file writer. - * - * @param major the major version ({@link ClassFile#JAVA_4}, {@link ClassFile#JAVA_5}, ...). - * @param minor the minor version (0 for JDK 1.3 and later). - */ - public ClassFileWriter(int major, int minor) { - output = new ByteStream(512); - output.writeInt(0xCAFEBABE); // magic - output.writeShort(minor); - output.writeShort(major); - constPool = new ConstPoolWriter(output); - fields = new FieldWriter(constPool); - methods = new MethodWriter(constPool); - - } - - /** - * Returns a constant pool. - */ - public ConstPoolWriter getConstPool() { return constPool; } - - /** - * Returns a filed writer. - */ - public FieldWriter getFieldWriter() { return fields; } - - /** - * Returns a method writer. - */ - public MethodWriter getMethodWriter() { return methods; } - - /** - * Ends writing and returns the contents of the class file. - * - * @param accessFlags access flags. - * @param thisClass this class. an index indicating its CONSTANT_Class_info. - * @param superClass super class. an index indicating its CONSTANT_Class_info. - * @param interfaces implemented interfaces. - * index numbers indicating their ClassInfo. - * It may be null. - * @param aw attributes of the class file. May be null. - * - * @see AccessFlag - */ - public byte[] end(int accessFlags, int thisClass, int superClass, - int[] interfaces, AttributeWriter aw) { - constPool.end(); - output.writeShort(accessFlags); - output.writeShort(thisClass); - output.writeShort(superClass); - if (interfaces == null) - output.writeShort(0); - else { - int n = interfaces.length; - output.writeShort(n); - for (int i = 0; i < n; i++) - output.writeShort(interfaces[i]); - } - - output.enlarge(fields.dataSize() + methods.dataSize() + 6); - try { - output.writeShort(fields.size()); - fields.write(output); - - output.writeShort(methods.numOfMethods()); - methods.write(output); - } - catch (IOException e) {} - - writeAttribute(output, aw, 0); - return output.toByteArray(); - } - - /** - * Ends writing and writes the contents of the class file into the - * given output stream. - * - * @param accessFlags access flags. - * @param thisClass this class. an index indicating its CONSTANT_Class_info. - * @param superClass super class. an index indicating its CONSTANT_Class_info. - * @param interfaces implemented interfaces. - * index numbers indicating their CONSTATNT_Class_info. - * It may be null. - * @param aw attributes of the class file. May be null. - * - * @see AccessFlag - */ - public void end(DataOutputStream out, - int accessFlags, int thisClass, int superClass, - int[] interfaces, AttributeWriter aw) - throws IOException - { - constPool.end(); - output.writeTo(out); - out.writeShort(accessFlags); - out.writeShort(thisClass); - out.writeShort(superClass); - if (interfaces == null) - out.writeShort(0); - else { - int n = interfaces.length; - out.writeShort(n); - for (int i = 0; i < n; i++) - out.writeShort(interfaces[i]); - } - - out.writeShort(fields.size()); - fields.write(out); - - out.writeShort(methods.numOfMethods()); - methods.write(out); - if (aw == null) - out.writeShort(0); - else { - out.writeShort(aw.size()); - aw.write(out); - } - } - - /** - * This writes attributes. - * - *

For example, the following object writes a synthetic attribute: - * - * 

-     * ConstPoolWriter cpw = ...;
-     * final int tag = cpw.addUtf8Info("Synthetic");
-     * AttributeWriter aw = new AttributeWriter() {
-     *     public int size() {
-     *         return 1;
-     *     }
-     *     public void write(DataOutputStream out) throws java.io.IOException {
-     *         out.writeShort(tag);
-     *         out.writeInt(0);
-     *     }
-     * };
-     *
- */ - public static interface AttributeWriter { - /** - * Returns the number of attributes that this writer will - * write. - */ - public int size(); - - /** - * Writes all the contents of the attributes. The binary representation - * of the contents is an array of attribute_info. - */ - public void write(DataOutputStream out) throws IOException; - } - - static void writeAttribute(ByteStream bs, AttributeWriter aw, int attrCount) { - if (aw == null) { - bs.writeShort(attrCount); - return; - } - - bs.writeShort(aw.size() + attrCount); - DataOutputStream dos = new DataOutputStream(bs); - try { - aw.write(dos); - dos.flush(); - } - catch (IOException e) {} - } - - /** - * Field. - */ - public static final class FieldWriter { - protected ByteStream output; - protected ConstPoolWriter constPool; - private int fieldCount; - - FieldWriter(ConstPoolWriter cp) { - output = new ByteStream(128); - constPool = cp; - fieldCount = 0; - } - - /** - * Adds a new field. - * - * @param accessFlags access flags. - * @param name the field name. - * @param descriptor the field type. - * @param aw the attributes of the field. may be null. - * @see AccessFlag - */ - public void add(int accessFlags, String name, String descriptor, AttributeWriter aw) { - int nameIndex = constPool.addUtf8Info(name); - int descIndex = constPool.addUtf8Info(descriptor); - add(accessFlags, nameIndex, descIndex, aw); - } - - /** - * Adds a new field. - * - * @param accessFlags access flags. - * @param name the field name. an index indicating its CONSTANT_Utf8_info. - * @param descriptor the field type. an index indicating its CONSTANT_Utf8_info. - * @param aw the attributes of the field. may be null. - * @see AccessFlag - */ - public void add(int accessFlags, int name, int descriptor, AttributeWriter aw) { - ++fieldCount; - output.writeShort(accessFlags); - output.writeShort(name); - output.writeShort(descriptor); - writeAttribute(output, aw, 0); - } - - int size() { return fieldCount; } - - int dataSize() { return output.size(); } - - /** - * Writes the added fields. - */ - void write(OutputStream out) throws IOException { - output.writeTo(out); - } - } - - /** - * Method. - */ - public static final class MethodWriter { - protected ByteStream output; - protected ConstPoolWriter constPool; - private int methodCount; - protected int codeIndex; - protected int throwsIndex; - protected int stackIndex; - - private int startPos; - private boolean isAbstract; - private int catchPos; - private int catchCount; - - MethodWriter(ConstPoolWriter cp) { - output = new ByteStream(256); - constPool = cp; - methodCount = 0; - codeIndex = 0; - throwsIndex = 0; - stackIndex = 0; - } - - /** - * Starts Adding a new method. - * - * @param accessFlags access flags. - * @param name the method name. - * @param descriptor the method signature. - * @param exceptions throws clause. It may be null. - * The class names must be the JVM-internal - * representations like java/lang/Exception. - * @param aw attributes to the Method_info. - */ - public void begin(int accessFlags, String name, String descriptor, - String[] exceptions, AttributeWriter aw) { - int nameIndex = constPool.addUtf8Info(name); - int descIndex = constPool.addUtf8Info(descriptor); - int[] intfs; - if (exceptions == null) - intfs = null; - else - intfs = constPool.addClassInfo(exceptions); - - begin(accessFlags, nameIndex, descIndex, intfs, aw); - } - - /** - * Starts adding a new method. - * - * @param accessFlags access flags. - * @param name the method name. an index indicating its CONSTANT_Utf8_info. - * @param descriptor the field type. an index indicating its CONSTANT_Utf8_info. - * @param exceptions throws clause. indexes indicating CONSTANT_Class_infos. - * It may be null. - * @param aw attributes to the Method_info. - */ - public void begin(int accessFlags, int name, int descriptor, int[] exceptions, AttributeWriter aw) { - ++methodCount; - output.writeShort(accessFlags); - output.writeShort(name); - output.writeShort(descriptor); - isAbstract = (accessFlags & AccessFlag.ABSTRACT) != 0; - - int attrCount = isAbstract ? 0 : 1; - if (exceptions != null) - ++attrCount; - - writeAttribute(output, aw, attrCount); - - if (exceptions != null) - writeThrows(exceptions); - - if (!isAbstract) { - if (codeIndex == 0) - codeIndex = constPool.addUtf8Info(CodeAttribute.tag); - - startPos = output.getPos(); - output.writeShort(codeIndex); - output.writeBlank(12); // attribute_length, maxStack, maxLocals, code_lenth - } - - catchPos = -1; - catchCount = 0; - } - - private void writeThrows(int[] exceptions) { - if (throwsIndex == 0) - throwsIndex = constPool.addUtf8Info(ExceptionsAttribute.tag); - - output.writeShort(throwsIndex); - output.writeInt(exceptions.length * 2 + 2); - output.writeShort(exceptions.length); - for (int i = 0; i < exceptions.length; i++) - output.writeShort(exceptions[i]); - } - - /** - * Appends an 8bit value of bytecode. - * - * @see Opcode - */ - public void add(int b) { - output.write(b); - } - - /** - * Appends a 16bit value of bytecode. - */ - public void add16(int b) { - output.writeShort(b); - } - - /** - * Appends a 32bit value of bytecode. - */ - public void add32(int b) { - output.writeInt(b); - } - - /** - * Appends a invokevirtual, inovkespecial, or invokestatic bytecode. - * - * @see Opcode - */ - public void addInvoke(int opcode, String targetClass, String methodName, - String descriptor) { - int target = constPool.addClassInfo(targetClass); - int nt = constPool.addNameAndTypeInfo(methodName, descriptor); - int method = constPool.addMethodrefInfo(target, nt); - add(opcode); - add16(method); - } - - /** - * Ends appending bytecode. - */ - public void codeEnd(int maxStack, int maxLocals) { - if (!isAbstract) { - output.writeShort(startPos + 6, maxStack); - output.writeShort(startPos + 8, maxLocals); - output.writeInt(startPos + 10, output.getPos() - startPos - 14); // code_length - catchPos = output.getPos(); - catchCount = 0; - output.writeShort(0); // number of catch clauses - } - } - - /** - * Appends an exception_table entry to the - * Code_attribute. This method is available - * only after the codeEnd method is called. - * - * @param catchType an index indicating a CONSTANT_Class_info. - */ - public void addCatch(int startPc, int endPc, int handlerPc, int catchType) { - ++catchCount; - output.writeShort(startPc); - output.writeShort(endPc); - output.writeShort(handlerPc); - output.writeShort(catchType); - } - - /** - * Ends adding a new method. The add method must be - * called before the end method is called. - * - * @param smap a stack map table. may be null. - * @param aw attributes to the Code_attribute. - * may be null. - */ - public void end(StackMapTable.Writer smap, AttributeWriter aw) { - if (isAbstract) - return; - - // exception_table_length - output.writeShort(catchPos, catchCount); - - int attrCount = smap == null ? 0 : 1; - writeAttribute(output, aw, attrCount); - - if (smap != null) { - if (stackIndex == 0) - stackIndex = constPool.addUtf8Info(StackMapTable.tag); - - output.writeShort(stackIndex); - byte[] data = smap.toByteArray(); - output.writeInt(data.length); - output.write(data); - } - - // Code attribute_length - output.writeInt(startPos + 2, output.getPos() - startPos - 6); - } - - /** - * Returns the length of the bytecode that has been added so far. - * - * @return the length in bytes. - * @since 3.19 - */ - public int size() { return output.getPos() - startPos - 14; } - - int numOfMethods() { return methodCount; } - - int dataSize() { return output.size(); } - - /** - * Writes the added methods. - */ - void write(OutputStream out) throws IOException { - output.writeTo(out); - } - } - - /** - * Constant Pool. - */ - public static final class ConstPoolWriter { - ByteStream output; - protected int startPos; - protected int num; - - ConstPoolWriter(ByteStream out) { - output = out; - startPos = out.getPos(); - num = 1; - output.writeShort(1); // number of entries - } - - /** - * Makes CONSTANT_Class_info objects for each class name. - * - * @return an array of indexes indicating CONSTANT_Class_infos. - */ - public int[] addClassInfo(String[] classNames) { - int n = classNames.length; - int[] result = new int[n]; - for (int i = 0; i < n; i++) - result[i] = addClassInfo(classNames[i]); - - return result; - } - - /** - * Adds a new CONSTANT_Class_info structure. - * - *

This also adds a CONSTANT_Utf8_info structure - * for storing the class name. - * - * @param jvmname the JVM-internal representation of a class name. - * e.g. java/lang/Object. - * @return the index of the added entry. - */ - public int addClassInfo(String jvmname) { - int utf8 = addUtf8Info(jvmname); - output.write(ClassInfo.tag); - output.writeShort(utf8); - return num++; - } - - /** - * Adds a new CONSTANT_Class_info structure. - * - * @param name name_index - * @return the index of the added entry. - */ - public int addClassInfo(int name) { - output.write(ClassInfo.tag); - output.writeShort(name); - return num++; - } - - /** - * Adds a new CONSTANT_NameAndType_info structure. - * - * @param name name_index - * @param type descriptor_index - * @return the index of the added entry. - */ - public int addNameAndTypeInfo(String name, String type) { - return addNameAndTypeInfo(addUtf8Info(name), addUtf8Info(type)); - } - - /** - * Adds a new CONSTANT_NameAndType_info structure. - * - * @param name name_index - * @param type descriptor_index - * @return the index of the added entry. - */ - public int addNameAndTypeInfo(int name, int type) { - output.write(NameAndTypeInfo.tag); - output.writeShort(name); - output.writeShort(type); - return num++; - } - - /** - * Adds a new CONSTANT_Fieldref_info structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addFieldrefInfo(int classInfo, int nameAndTypeInfo) { - output.write(FieldrefInfo.tag); - output.writeShort(classInfo); - output.writeShort(nameAndTypeInfo); - return num++; - } - - /** - * Adds a new CONSTANT_Methodref_info structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addMethodrefInfo(int classInfo, int nameAndTypeInfo) { - output.write(MethodrefInfo.tag); - output.writeShort(classInfo); - output.writeShort(nameAndTypeInfo); - return num++; - } - - /** - * Adds a new CONSTANT_InterfaceMethodref_info - * structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addInterfaceMethodrefInfo(int classInfo, - int nameAndTypeInfo) { - output.write(InterfaceMethodrefInfo.tag); - output.writeShort(classInfo); - output.writeShort(nameAndTypeInfo); - return num++; - } - - /** - * Adds a new CONSTANT_MethodHandle_info - * structure. - * - * @param kind reference_kind - * such as {@link ConstPool#REF_invokeStatic REF_invokeStatic}. - * @param index reference_index. - * @return the index of the added entry. - * - * @since 3.17.1 - */ - public int addMethodHandleInfo(int kind, int index) { - output.write(MethodHandleInfo.tag); - output.write(kind); - output.writeShort(index); - return num++; - } - - /** - * Adds a new CONSTANT_MethodType_info - * structure. - * - * @param desc descriptor_index. - * @return the index of the added entry. - * - * @since 3.17.1 - */ - public int addMethodTypeInfo(int desc) { - output.write(MethodTypeInfo.tag); - output.writeShort(desc); - return num++; - } - - /** - * Adds a new CONSTANT_InvokeDynamic_info - * structure. - * - * @param bootstrap bootstrap_method_attr_index. - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - * - * @since 3.17.1 - */ - public int addInvokeDynamicInfo(int bootstrap, - int nameAndTypeInfo) { - output.write(InvokeDynamicInfo.tag); - output.writeShort(bootstrap); - output.writeShort(nameAndTypeInfo); - return num++; - } - - /** - * Adds a new CONSTANT_String_info - * structure. - * - *

This also adds a new CONSTANT_Utf8_info - * structure. - * - * @return the index of the added entry. - */ - public int addStringInfo(String str) { - int utf8 = addUtf8Info(str); - output.write(StringInfo.tag); - output.writeShort(utf8); - return num++; - } - - /** - * Adds a new CONSTANT_Integer_info - * structure. - * - * @return the index of the added entry. - */ - public int addIntegerInfo(int i) { - output.write(IntegerInfo.tag); - output.writeInt(i); - return num++; - } - - /** - * Adds a new CONSTANT_Float_info - * structure. - * - * @return the index of the added entry. - */ - public int addFloatInfo(float f) { - output.write(FloatInfo.tag); - output.writeFloat(f); - return num++; - } - - /** - * Adds a new CONSTANT_Long_info - * structure. - * - * @return the index of the added entry. - */ - public int addLongInfo(long l) { - output.write(LongInfo.tag); - output.writeLong(l); - int n = num; - num += 2; - return n; - } - - /** - * Adds a new CONSTANT_Double_info - * structure. - * - * @return the index of the added entry. - */ - public int addDoubleInfo(double d) { - output.write(DoubleInfo.tag); - output.writeDouble(d); - int n = num; - num += 2; - return n; - } - - /** - * Adds a new CONSTANT_Utf8_info - * structure. - * - * @return the index of the added entry. - */ - public int addUtf8Info(String utf8) { - output.write(Utf8Info.tag); - output.writeUTF(utf8); - return num++; - } - - /** - * Writes the contents of this class pool. - */ - void end() { - output.writeShort(startPos, num); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java b/src/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java deleted file mode 100644 index 8efc6d4..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java +++ /dev/null @@ -1,267 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * Utility for computing max_stack. - */ -class CodeAnalyzer implements Opcode { - private ConstPool constPool; - private CodeAttribute codeAttr; - - public CodeAnalyzer(CodeAttribute ca) { - codeAttr = ca; - constPool = ca.getConstPool(); - } - - public int computeMaxStack() - throws BadBytecode - { - /* d = stack[i] - * d == 0: not visited - * d > 0: the depth is d - 1 after executing the bytecode at i. - * d < 0: not visited. the initial depth (before execution) is 1 - d. - */ - CodeIterator ci = codeAttr.iterator(); - int length = ci.getCodeLength(); - int[] stack = new int[length]; - constPool = codeAttr.getConstPool(); - initStack(stack, codeAttr); - boolean repeat; - do { - repeat = false; - for (int i = 0; i < length; ++i) - if (stack[i] < 0) { - repeat = true; - visitBytecode(ci, stack, i); - } - } while (repeat); - - int maxStack = 1; - for (int i = 0; i < length; ++i) - if (stack[i] > maxStack) - maxStack = stack[i]; - - return maxStack - 1; // the base is 1. - } - - private void initStack(int[] stack, CodeAttribute ca) { - stack[0] = -1; - ExceptionTable et = ca.getExceptionTable(); - if (et != null) { - int size = et.size(); - for (int i = 0; i < size; ++i) - stack[et.handlerPc(i)] = -2; // an exception is on stack - } - } - - private void visitBytecode(CodeIterator ci, int[] stack, int index) - throws BadBytecode - { - int codeLength = stack.length; - ci.move(index); - int stackDepth = -stack[index]; - int[] jsrDepth = new int[1]; - jsrDepth[0] = -1; - while (ci.hasNext()) { - index = ci.next(); - stack[index] = stackDepth; - int op = ci.byteAt(index); - stackDepth = visitInst(op, ci, index, stackDepth); - if (stackDepth < 1) - throw new BadBytecode("stack underflow at " + index); - - if (processBranch(op, ci, index, codeLength, stack, stackDepth, jsrDepth)) - break; - - if (isEnd(op)) // return, ireturn, athrow, ... - break; - - if (op == JSR || op == JSR_W) - --stackDepth; - } - } - - private boolean processBranch(int opcode, CodeIterator ci, int index, - int codeLength, int[] stack, int stackDepth, int[] jsrDepth) - throws BadBytecode - { - if ((IFEQ <= opcode && opcode <= IF_ACMPNE) - || opcode == IFNULL || opcode == IFNONNULL) { - int target = index + ci.s16bitAt(index + 1); - checkTarget(index, target, codeLength, stack, stackDepth); - } - else { - int target, index2; - switch (opcode) { - case GOTO : - target = index + ci.s16bitAt(index + 1); - checkTarget(index, target, codeLength, stack, stackDepth); - return true; - case GOTO_W : - target = index + ci.s32bitAt(index + 1); - checkTarget(index, target, codeLength, stack, stackDepth); - return true; - case JSR : - case JSR_W : - if (opcode == JSR) - target = index + ci.s16bitAt(index + 1); - else - target = index + ci.s32bitAt(index + 1); - - checkTarget(index, target, codeLength, stack, stackDepth); - /* - * It is unknown which RET comes back to this JSR. - * So we assume that if the stack depth at one JSR instruction - * is N, then it is also N at other JSRs and N - 1 at all RET - * instructions. Note that STACK_GROW[JSR] is 1 since it pushes - * a return address on the operand stack. - */ - if (jsrDepth[0] < 0) { - jsrDepth[0] = stackDepth; - return false; - } - else if (stackDepth == jsrDepth[0]) - return false; - else - throw new BadBytecode( - "sorry, cannot compute this data flow due to JSR: " - + stackDepth + "," + jsrDepth[0]); - case RET : - if (jsrDepth[0] < 0) { - jsrDepth[0] = stackDepth + 1; - return false; - } - else if (stackDepth + 1 == jsrDepth[0]) - return true; - else - throw new BadBytecode( - "sorry, cannot compute this data flow due to RET: " - + stackDepth + "," + jsrDepth[0]); - case LOOKUPSWITCH : - case TABLESWITCH : - index2 = (index & ~3) + 4; - target = index + ci.s32bitAt(index2); - checkTarget(index, target, codeLength, stack, stackDepth); - if (opcode == LOOKUPSWITCH) { - int npairs = ci.s32bitAt(index2 + 4); - index2 += 12; - for (int i = 0; i < npairs; ++i) { - target = index + ci.s32bitAt(index2); - checkTarget(index, target, codeLength, - stack, stackDepth); - index2 += 8; - } - } - else { - int low = ci.s32bitAt(index2 + 4); - int high = ci.s32bitAt(index2 + 8); - int n = high - low + 1; - index2 += 12; - for (int i = 0; i < n; ++i) { - target = index + ci.s32bitAt(index2); - checkTarget(index, target, codeLength, - stack, stackDepth); - index2 += 4; - } - } - - return true; // always branch. - } - } - - return false; // may not branch. - } - - private void checkTarget(int opIndex, int target, int codeLength, - int[] stack, int stackDepth) - throws BadBytecode - { - if (target < 0 || codeLength <= target) - throw new BadBytecode("bad branch offset at " + opIndex); - - int d = stack[target]; - if (d == 0) - stack[target] = -stackDepth; - else if (d != stackDepth && d != -stackDepth) - throw new BadBytecode("verification error (" + stackDepth + - "," + d + ") at " + opIndex); - } - - private static boolean isEnd(int opcode) { - return (IRETURN <= opcode && opcode <= RETURN) || opcode == ATHROW; - } - - /** - * Visits an instruction. - */ - private int visitInst(int op, CodeIterator ci, int index, int stack) - throws BadBytecode - { - String desc; - switch (op) { - case GETFIELD : - stack += getFieldSize(ci, index) - 1; - break; - case PUTFIELD : - stack -= getFieldSize(ci, index) + 1; - break; - case GETSTATIC : - stack += getFieldSize(ci, index); - break; - case PUTSTATIC : - stack -= getFieldSize(ci, index); - break; - case INVOKEVIRTUAL : - case INVOKESPECIAL : - desc = constPool.getMethodrefType(ci.u16bitAt(index + 1)); - stack += Descriptor.dataSize(desc) - 1; - break; - case INVOKESTATIC : - desc = constPool.getMethodrefType(ci.u16bitAt(index + 1)); - stack += Descriptor.dataSize(desc); - break; - case INVOKEINTERFACE : - desc = constPool.getInterfaceMethodrefType( - ci.u16bitAt(index + 1)); - stack += Descriptor.dataSize(desc) - 1; - break; - case INVOKEDYNAMIC : - desc = constPool.getInvokeDynamicType(ci.u16bitAt(index + 1)); - stack += Descriptor.dataSize(desc); // assume CosntPool#REF_invokeStatic - break; - case ATHROW : - stack = 1; // the stack becomes empty (1 means no values). - break; - case MULTIANEWARRAY : - stack += 1 - ci.byteAt(index + 3); - break; - case WIDE : - op = ci.byteAt(index + 1); - // don't break here. - default : - stack += STACK_GROW[op]; - } - - return stack; - } - - private int getFieldSize(CodeIterator ci, int index) { - String desc = constPool.getFieldrefType(ci.u16bitAt(index + 1)); - return Descriptor.dataSize(desc); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java deleted file mode 100644 index 86e7bd9..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java +++ /dev/null @@ -1,595 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.List; -import java.util.ArrayList; -import java.util.Iterator; -import java.util.Map; - -/** - * Code_attribute. - * - *

To browse the code field of - * a Code_attribute structure, - * use CodeIterator. - * - * @see CodeIterator - * @see #iterator() - */ -public class CodeAttribute extends AttributeInfo implements Opcode { - /** - * The name of this attribute "Code". - */ - public static final String tag = "Code"; - - // code[] is stored in AttributeInfo.info. - - private int maxStack; - private int maxLocals; - private ExceptionTable exceptions; - private ArrayList attributes; - - /** - * Constructs a Code_attribute. - * - * @param cp constant pool table - * @param stack max_stack - * @param locals max_locals - * @param code code[] - * @param etable exception_table[] - */ - public CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, - ExceptionTable etable) - { - super(cp, tag); - maxStack = stack; - maxLocals = locals; - info = code; - exceptions = etable; - attributes = new ArrayList(); - } - - /** - * Constructs a copy of Code_attribute. - * Specified class names are replaced during the copy. - * - * @param cp constant pool table. - * @param src source Code attribute. - * @param classnames pairs of replaced and substituted - * class names. - */ - private CodeAttribute(ConstPool cp, CodeAttribute src, Map classnames) - throws BadBytecode - { - super(cp, tag); - - maxStack = src.getMaxStack(); - maxLocals = src.getMaxLocals(); - exceptions = src.getExceptionTable().copy(cp, classnames); - attributes = new ArrayList(); - List src_attr = src.getAttributes(); - int num = src_attr.size(); - for (int i = 0; i < num; ++i) { - AttributeInfo ai = (AttributeInfo)src_attr.get(i); - attributes.add(ai.copy(cp, classnames)); - } - - info = src.copyCode(cp, classnames, exceptions, this); - } - - CodeAttribute(ConstPool cp, int name_id, DataInputStream in) - throws IOException - { - super(cp, name_id, (byte[])null); - int attr_len = in.readInt(); - - maxStack = in.readUnsignedShort(); - maxLocals = in.readUnsignedShort(); - - int code_len = in.readInt(); - info = new byte[code_len]; - in.readFully(info); - - exceptions = new ExceptionTable(cp, in); - - attributes = new ArrayList(); - int num = in.readUnsignedShort(); - for (int i = 0; i < num; ++i) - attributes.add(AttributeInfo.read(cp, in)); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - * @exception RuntimeCopyException if a BadBytecode - * exception is thrown, it is - * converted into - * RuntimeCopyException. - * - * @return CodeAttribute object. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) - throws RuntimeCopyException - { - try { - return new CodeAttribute(newCp, this, classnames); - } - catch (BadBytecode e) { - throw new RuntimeCopyException("bad bytecode. fatal?"); - } - } - - /** - * An exception that may be thrown by copy() - * in CodeAttribute. - */ - public static class RuntimeCopyException extends RuntimeException { - /** - * Constructs an exception. - */ - public RuntimeCopyException(String s) { - super(s); - } - } - - /** - * Returns the length of this attribute_info - * structure. - * The returned value is attribute_length + 6. - */ - public int length() { - return 18 + info.length + exceptions.size() * 8 - + AttributeInfo.getLength(attributes); - } - - void write(DataOutputStream out) throws IOException { - out.writeShort(name); // attribute_name_index - out.writeInt(length() - 6); // attribute_length - out.writeShort(maxStack); // max_stack - out.writeShort(maxLocals); // max_locals - out.writeInt(info.length); // code_length - out.write(info); // code - exceptions.write(out); - out.writeShort(attributes.size()); // attributes_count - AttributeInfo.writeAll(attributes, out); // attributes - } - - /** - * This method is not available. - * - * @throws java.lang.UnsupportedOperationException always thrown. - */ - public byte[] get() { - throw new UnsupportedOperationException("CodeAttribute.get()"); - } - - /** - * This method is not available. - * - * @throws java.lang.UnsupportedOperationException always thrown. - */ - public void set(byte[] newinfo) { - throw new UnsupportedOperationException("CodeAttribute.set()"); - } - - void renameClass(String oldname, String newname) { - AttributeInfo.renameClass(attributes, oldname, newname); - } - - void renameClass(Map classnames) { - AttributeInfo.renameClass(attributes, classnames); - } - - void getRefClasses(Map classnames) { - AttributeInfo.getRefClasses(attributes, classnames); - } - - /** - * Returns the name of the class declaring the method including - * this code attribute. - */ - public String getDeclaringClass() { - ConstPool cp = getConstPool(); - return cp.getClassName(); - } - - /** - * Returns max_stack. - */ - public int getMaxStack() { - return maxStack; - } - - /** - * Sets max_stack. - */ - public void setMaxStack(int value) { - maxStack = value; - } - - /** - * Computes the maximum stack size and sets max_stack - * to the computed size. - * - * @throws BadBytecode if this method fails in computing. - * @return the newly computed value of max_stack - */ - public int computeMaxStack() throws BadBytecode { - maxStack = new CodeAnalyzer(this).computeMaxStack(); - return maxStack; - } - - /** - * Returns max_locals. - */ - public int getMaxLocals() { - return maxLocals; - } - - /** - * Sets max_locals. - */ - public void setMaxLocals(int value) { - maxLocals = value; - } - - /** - * Returns code_length. - */ - public int getCodeLength() { - return info.length; - } - - /** - * Returns code[]. - */ - public byte[] getCode() { - return info; - } - - /** - * Sets code[]. - */ - void setCode(byte[] newinfo) { super.set(newinfo); } - - /** - * Makes a new iterator for reading this code attribute. - */ - public CodeIterator iterator() { - return new CodeIterator(this); - } - - /** - * Returns exception_table[]. - */ - public ExceptionTable getExceptionTable() { return exceptions; } - - /** - * Returns attributes[]. - * It returns a list of AttributeInfo. - * A new element can be added to the returned list - * and an existing element can be removed from the list. - * - * @see AttributeInfo - */ - public List getAttributes() { return attributes; } - - /** - * Returns the attribute with the specified name. - * If it is not found, this method returns null. - * - * @param name attribute name - * @return an AttributeInfo object or null. - */ - public AttributeInfo getAttribute(String name) { - return AttributeInfo.lookup(attributes, name); - } - - /** - * Adds a stack map table. If another copy of stack map table - * is already contained, the old one is removed. - * - * @param smt the stack map table added to this code attribute. - * If it is null, a new stack map is not added. - * Only the old stack map is removed. - */ - public void setAttribute(StackMapTable smt) { - AttributeInfo.remove(attributes, StackMapTable.tag); - if (smt != null) - attributes.add(smt); - } - - /** - * Adds a stack map table for J2ME (CLDC). If another copy of stack map table - * is already contained, the old one is removed. - * - * @param sm the stack map table added to this code attribute. - * If it is null, a new stack map is not added. - * Only the old stack map is removed. - * @since 3.12 - */ - public void setAttribute(StackMap sm) { - AttributeInfo.remove(attributes, StackMap.tag); - if (sm != null) - attributes.add(sm); - } - - /** - * Copies code. - */ - private byte[] copyCode(ConstPool destCp, Map classnames, - ExceptionTable etable, CodeAttribute destCa) - throws BadBytecode - { - int len = getCodeLength(); - byte[] newCode = new byte[len]; - destCa.info = newCode; - LdcEntry ldc = copyCode(this.info, 0, len, this.getConstPool(), - newCode, destCp, classnames); - return LdcEntry.doit(newCode, ldc, etable, destCa); - } - - private static LdcEntry copyCode(byte[] code, int beginPos, int endPos, - ConstPool srcCp, byte[] newcode, - ConstPool destCp, Map classnameMap) - throws BadBytecode - { - int i2, index; - LdcEntry ldcEntry = null; - - for (int i = beginPos; i < endPos; i = i2) { - i2 = CodeIterator.nextOpcode(code, i); - byte c = code[i]; - newcode[i] = c; - switch (c & 0xff) { - case LDC_W : - case LDC2_W : - case GETSTATIC : - case PUTSTATIC : - case GETFIELD : - case PUTFIELD : - case INVOKEVIRTUAL : - case INVOKESPECIAL : - case INVOKESTATIC : - case NEW : - case ANEWARRAY : - case CHECKCAST : - case INSTANCEOF : - copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, - classnameMap); - break; - case LDC : - index = code[i + 1] & 0xff; - index = srcCp.copy(index, destCp, classnameMap); - if (index < 0x100) - newcode[i + 1] = (byte)index; - else { - newcode[i] = NOP; - newcode[i + 1] = NOP; - LdcEntry ldc = new LdcEntry(); - ldc.where = i; - ldc.index = index; - ldc.next = ldcEntry; - ldcEntry = ldc; - } - break; - case INVOKEINTERFACE : - copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, - classnameMap); - newcode[i + 3] = code[i + 3]; - newcode[i + 4] = code[i + 4]; - break; - case INVOKEDYNAMIC : - copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, - classnameMap); - newcode[i + 3] = 0; - newcode[i + 4] = 0; - break; - case MULTIANEWARRAY : - copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, - classnameMap); - newcode[i + 3] = code[i + 3]; - break; - default : - while (++i < i2) - newcode[i] = code[i]; - - break; - } - } - - return ldcEntry; - } - - private static void copyConstPoolInfo(int i, byte[] code, ConstPool srcCp, - byte[] newcode, ConstPool destCp, - Map classnameMap) { - int index = ((code[i] & 0xff) << 8) | (code[i + 1] & 0xff); - index = srcCp.copy(index, destCp, classnameMap); - newcode[i] = (byte)(index >> 8); - newcode[i + 1] = (byte)index; - } - - static class LdcEntry { - LdcEntry next; - int where; - int index; - - static byte[] doit(byte[] code, LdcEntry ldc, ExceptionTable etable, - CodeAttribute ca) - throws BadBytecode - { - if (ldc != null) - code = CodeIterator.changeLdcToLdcW(code, etable, ca, ldc); - - /* The original code was the following: - - while (ldc != null) { - int where = ldc.where; - code = CodeIterator.insertGapCore0(code, where, 1, false, etable, ca); - code[where] = (byte)Opcode.LDC_W; - ByteArray.write16bit(ldc.index, code, where + 1); - ldc = ldc.next; - } - - But this code does not support a large method > 32KB. - */ - - return code; - } - } - - /** - * Changes the index numbers of the local variables - * to append a new parameter. - * This method does not update LocalVariableAttribute, - * LocalVariableTypeAttribute, - * StackMapTable, or StackMap. - * These attributes must be explicitly updated. - * - * @param where the index of the new parameter. - * @param size the type size of the new parameter (1 or 2). - * - * @see LocalVariableAttribute#shiftIndex(int, int) - * @see LocalVariableTypeAttribute#shiftIndex(int, int) - * @see StackMapTable#insertLocal(int, int, int) - * @see StackMap#insertLocal(int, int, int) - */ - public void insertLocalVar(int where, int size) throws BadBytecode { - CodeIterator ci = iterator(); - while (ci.hasNext()) - shiftIndex(ci, where, size); - - setMaxLocals(getMaxLocals() + size); - } - - /** - * @param lessThan If the index of the local variable is - * less than this value, it does not change. - * Otherwise, the index is increased. - * @param delta the indexes of the local variables are - * increased by this value. - */ - private static void shiftIndex(CodeIterator ci, int lessThan, int delta) throws BadBytecode { - int index = ci.next(); - int opcode = ci.byteAt(index); - if (opcode < ILOAD) - return; - else if (opcode < IASTORE) { - if (opcode < ILOAD_0) { - // iload, lload, fload, dload, aload - shiftIndex8(ci, index, opcode, lessThan, delta); - } - else if (opcode < IALOAD) { - // iload_0, ..., aload_3 - shiftIndex0(ci, index, opcode, lessThan, delta, ILOAD_0, ILOAD); - } - else if (opcode < ISTORE) - return; - else if (opcode < ISTORE_0) { - // istore, lstore, ... - shiftIndex8(ci, index, opcode, lessThan, delta); - } - else { - // istore_0, ..., astore_3 - shiftIndex0(ci, index, opcode, lessThan, delta, ISTORE_0, ISTORE); - } - } - else if (opcode == IINC) { - int var = ci.byteAt(index + 1); - if (var < lessThan) - return; - - var += delta; - if (var < 0x100) - ci.writeByte(var, index + 1); - else { - int plus = (byte)ci.byteAt(index + 2); - int pos = ci.insertExGap(3); - ci.writeByte(WIDE, pos - 3); - ci.writeByte(IINC, pos - 2); - ci.write16bit(var, pos - 1); - ci.write16bit(plus, pos + 1); - } - } - else if (opcode == RET) - shiftIndex8(ci, index, opcode, lessThan, delta); - else if (opcode == WIDE) { - int var = ci.u16bitAt(index + 2); - if (var < lessThan) - return; - - var += delta; - ci.write16bit(var, index + 2); - } - } - - private static void shiftIndex8(CodeIterator ci, int index, int opcode, - int lessThan, int delta) - throws BadBytecode - { - int var = ci.byteAt(index + 1); - if (var < lessThan) - return; - - var += delta; - if (var < 0x100) - ci.writeByte(var, index + 1); - else { - int pos = ci.insertExGap(2); - ci.writeByte(WIDE, pos - 2); - ci.writeByte(opcode, pos - 1); - ci.write16bit(var, pos); - } - } - - private static void shiftIndex0(CodeIterator ci, int index, int opcode, - int lessThan, int delta, - int opcode_i_0, int opcode_i) - throws BadBytecode - { - int var = (opcode - opcode_i_0) % 4; - if (var < lessThan) - return; - - var += delta; - if (var < 4) - ci.writeByte(opcode + delta, index); - else { - opcode = (opcode - opcode_i_0) / 4 + opcode_i; - if (var < 0x100) { - int pos = ci.insertExGap(1); - ci.writeByte(opcode, pos - 1); - ci.writeByte(var, pos); - } - else { - int pos = ci.insertExGap(3); - ci.writeByte(WIDE, pos - 1); - ci.writeByte(opcode, pos); - ci.write16bit(var, pos + 1); - } - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/CodeIterator.java b/src/com/wenshuo/agent/javassist/bytecode/CodeIterator.java deleted file mode 100644 index 7dfc316..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/CodeIterator.java +++ /dev/null @@ -1,1604 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.util.ArrayList; - -/** - * An iterator for editing a code attribute. - * - *

To directly read or edit a bytecode sequence, call {@link #byteAt(int)}, {@link #s16bitAt(int)}, - * {@link #writeByte(int, int)}, {@link #write16bit(int, int)}, and other methods. - * For example, if method refers to a CtMethod object, - * the following code substitutes the NOP instruction for the first - * instruction of the method: - * - * 

- * CodeAttribute ca = method.getMethodInfo().getCodeAttribute();
- * CodeIterator ci = ca.iterator();
- * ci.writeByte(Opcode.NOP, 0);
- * - *

To visit every instruction, call {@link #next()} on a CodeIterator. - * It returns the index of the first byte of the next instruction. - * - *

If there are multiple CodeIterators referring to the - * same Code_attribute, then inserting a gap by one - * CodeIterator will break the other - * CodeIterator. - * - *

This iterator does not provide remove(). - * If a piece of code in a Code_attribute is unnecessary, - * it should be overwritten with NOP. - * - * @see CodeAttribute#iterator() - */ -public class CodeIterator implements Opcode { - protected CodeAttribute codeAttr; - protected byte[] bytecode; - protected int endPos; - protected int currentPos; - protected int mark; - - protected CodeIterator(CodeAttribute ca) { - codeAttr = ca; - bytecode = ca.getCode(); - begin(); - } - - /** - * Moves to the first instruction. - */ - public void begin() { - currentPos = mark = 0; - endPos = getCodeLength(); - } - - /** - * Moves to the given index. - * - *

The index of the next instruction is set to the given index. - * The successive call to next() - * returns the index that has been given to move(). - * - *

Note that the index is into the byte array returned by - * get().getCode(). - * - * @see CodeAttribute#getCode() - */ - public void move(int index) { - currentPos = index; - } - - /** - * Sets a mark to the bytecode at the given index. - * The mark can be used to track the position of that bytecode - * when code blocks are inserted. - * If a code block is inclusively inserted at the position of the - * bytecode, the mark is set to the inserted code block. - * - * @see #getMark() - * @since 3.11 - */ - public void setMark(int index) { - mark = index; - } - - /** - * Gets the index of the position of the mark set by - * setMark. - * - * @return the index of the position. - * @see #setMark(int) - * @since 3.11 - */ - public int getMark() { return mark; } - - /** - * Returns a Code attribute read with this iterator. - */ - public CodeAttribute get() { - return codeAttr; - } - - /** - * Returns code_length of Code_attribute. - */ - public int getCodeLength() { - return bytecode.length; - } - - /** - * Returns the unsigned 8bit value at the given index. - */ - public int byteAt(int index) { return bytecode[index] & 0xff; } - - /** - * Returns the signed 8bit value at the given index. - */ - public int signedByteAt(int index) { return bytecode[index]; } - - /** - * Writes an 8bit value at the given index. - */ - public void writeByte(int value, int index) { - bytecode[index] = (byte)value; - } - - /** - * Returns the unsigned 16bit value at the given index. - */ - public int u16bitAt(int index) { - return ByteArray.readU16bit(bytecode, index); - } - - /** - * Returns the signed 16bit value at the given index. - */ - public int s16bitAt(int index) { - return ByteArray.readS16bit(bytecode, index); - } - - /** - * Writes a 16 bit integer at the index. - */ - public void write16bit(int value, int index) { - ByteArray.write16bit(value, bytecode, index); - } - - /** - * Returns the signed 32bit value at the given index. - */ - public int s32bitAt(int index) { - return ByteArray.read32bit(bytecode, index); - } - - /** - * Writes a 32bit integer at the index. - */ - public void write32bit(int value, int index) { - ByteArray.write32bit(value, bytecode, index); - } - - /** - * Writes a byte array at the index. - * - * @param code may be a zero-length array. - */ - public void write(byte[] code, int index) { - int len = code.length; - for (int j = 0; j < len; ++j) - bytecode[index++] = code[j]; - } - - /** - * Returns true if there is more instructions. - */ - public boolean hasNext() { return currentPos < endPos; } - - /** - * Returns the index of the next instruction - * (not the operand following the current opcode). - * - *

Note that the index is into the byte array returned by - * get().getCode(). - * - * @see CodeAttribute#getCode() - * @see CodeIterator#byteAt(int) - */ - public int next() throws BadBytecode { - int pos = currentPos; - currentPos = nextOpcode(bytecode, pos); - return pos; - } - - /** - * Obtains the value that the next call - * to next() will return. - * - *

This method is side-effects free. - * Successive calls to lookAhead() return the - * same value until next() is called. - */ - public int lookAhead() { - return currentPos; - } - - /** - * Moves to the instruction for - * either super() or this(). - * - *

This method skips all the instructions for computing arguments - * to super() or this(), which should be - * placed at the beginning of a constructor body. - * - *

This method returns the index of INVOKESPECIAL instruction - * executing super() or this(). - * A successive call to next() returns the - * index of the next instruction following that INVOKESPECIAL. - * - *

This method works only for a constructor. - * - * @return the index of the INVOKESPECIAL instruction, or -1 - * if a constructor invocation is not found. - */ - public int skipConstructor() throws BadBytecode { - return skipSuperConstructor0(-1); - } - - /** - * Moves to the instruction for super(). - * - *

This method skips all the instructions for computing arguments to - * super(), which should be - * placed at the beginning of a constructor body. - * - *

This method returns the index of INVOKESPECIAL instruction - * executing super(). - * A successive call to next() returns the - * index of the next instruction following that INVOKESPECIAL. - * - *

This method works only for a constructor. - * - * @return the index of the INVOKESPECIAL instruction, or -1 - * if a super constructor invocation is not found - * but this() is found. - */ - public int skipSuperConstructor() throws BadBytecode { - return skipSuperConstructor0(0); - } - - /** - * Moves to the instruction for this(). - * - *

This method skips all the instructions for computing arguments to - * this(), which should be - * placed at the beginning of a constructor body. - * - *

This method returns the index of INVOKESPECIAL instruction - * executing this(). - * A successive call to next() returns the - * index of the next instruction following that INVOKESPECIAL. - * - *

This method works only for a constructor. - * - * @return the index of the INVOKESPECIAL instruction, or -1 - * if a explicit constructor invocation is not found - * but super() is found. - */ - public int skipThisConstructor() throws BadBytecode { - return skipSuperConstructor0(1); - } - - /* skipSuper 1: this(), 0: super(), -1: both. - */ - private int skipSuperConstructor0(int skipThis) throws BadBytecode { - begin(); - ConstPool cp = codeAttr.getConstPool(); - String thisClassName = codeAttr.getDeclaringClass(); - int nested = 0; - while (hasNext()) { - int index = next(); - int c = byteAt(index); - if (c == NEW) - ++nested; - else if (c == INVOKESPECIAL) { - int mref = ByteArray.readU16bit(bytecode, index + 1); - if (cp.getMethodrefName(mref).equals(MethodInfo.nameInit)) - if (--nested < 0) { - if (skipThis < 0) - return index; - - String cname = cp.getMethodrefClassName(mref); - if (cname.equals(thisClassName) == (skipThis > 0)) - return index; - else - break; - } - } - } - - begin(); - return -1; - } - - /** - * Inserts the given bytecode sequence - * before the next instruction that would be returned by - * next() (not before the instruction returned - * by the last call to next()). - * Branch offsets and the exception table are also updated. - * - *

If the next instruction is at the beginning of a block statement, - * then the bytecode is inserted within that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - * @param code inserted bytecode sequence. - * @return the index indicating the first byte of the - * inserted byte sequence. - */ - public int insert(byte[] code) - throws BadBytecode - { - return insert0(currentPos, code, false); - } - - /** - * Inserts the given bytecode sequence - * before the instruction at the given index pos. - * Branch offsets and the exception table are also updated. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the bytecode is inserted within that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - *

The index at which the byte sequence is actually inserted - * might be different from pos since some other bytes might be - * inserted at other positions (e.g. to change GOTO - * to GOTO_W). - * - * @param pos the index at which a byte sequence is inserted. - * @param code inserted bytecode sequence. - */ - public void insert(int pos, byte[] code) throws BadBytecode { - insert0(pos, code, false); - } - - /** - * Inserts the given bytecode sequence - * before the instruction at the given index pos. - * Branch offsets and the exception table are also updated. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the bytecode is inserted within that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - * @param pos the index at which a byte sequence is inserted. - * @param code inserted bytecode sequence. - * @return the index indicating the first byte of the - * inserted byte sequence, which might be - * different from pos. - * @since 3.11 - */ - public int insertAt(int pos, byte[] code) throws BadBytecode { - return insert0(pos, code, false); - } - - /** - * Inserts the given bytecode sequence exclusively - * before the next instruction that would be returned by - * next() (not before the instruction returned - * by tha last call to next()). - * Branch offsets and the exception table are also updated. - * - *

If the next instruction is at the beginning of a block statement, - * then the bytecode is excluded from that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - * @param code inserted bytecode sequence. - * @return the index indicating the first byte of the - * inserted byte sequence. - */ - public int insertEx(byte[] code) - throws BadBytecode - { - return insert0(currentPos, code, true); - } - - /** - * Inserts the given bytecode sequence exclusively - * before the instruction at the given index pos. - * Branch offsets and the exception table are also updated. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the bytecode is excluded from that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - *

The index at which the byte sequence is actually inserted - * might be different from pos since some other bytes might be - * inserted at other positions (e.g. to change GOTO - * to GOTO_W). - * - * @param pos the index at which a byte sequence is inserted. - * @param code inserted bytecode sequence. - */ - public void insertEx(int pos, byte[] code) throws BadBytecode { - insert0(pos, code, true); - } - - /** - * Inserts the given bytecode sequence exclusively - * before the instruction at the given index pos. - * Branch offsets and the exception table are also updated. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the bytecode is excluded from that block. - * - *

An extra gap may be inserted at the end of the inserted - * bytecode sequence for adjusting alignment if the code attribute - * includes LOOKUPSWITCH or TABLESWITCH. - * - * @param pos the index at which a byte sequence is inserted. - * @param code inserted bytecode sequence. - * @return the index indicating the first byte of the - * inserted byte sequence, which might be - * different from pos. - * @since 3.11 - */ - public int insertExAt(int pos, byte[] code) throws BadBytecode { - return insert0(pos, code, true); - } - - /** - * @return the index indicating the first byte of the - * inserted byte sequence. - */ - private int insert0(int pos, byte[] code, boolean exclusive) - throws BadBytecode - { - int len = code.length; - if (len <= 0) - return pos; - - // currentPos will change. - pos = insertGapAt(pos, len, exclusive).position; - - int p = pos; - for (int j = 0; j < len; ++j) - bytecode[p++] = code[j]; - - return pos; - } - - /** - * Inserts a gap - * before the next instruction that would be returned by - * next() (not before the instruction returned - * by the last call to next()). - * Branch offsets and the exception table are also updated. - * The inserted gap is filled with NOP. The gap length may be - * extended to a multiple of 4. - * - *

If the next instruction is at the beginning of a block statement, - * then the gap is inserted within that block. - * - * @param length gap length - * @return the index indicating the first byte of the inserted gap. - */ - public int insertGap(int length) throws BadBytecode { - return insertGapAt(currentPos, length, false).position; - } - - /** - * Inserts a gap in front of the instruction at the given - * index pos. - * Branch offsets and the exception table are also updated. - * The inserted gap is filled with NOP. The gap length may be - * extended to a multiple of 4. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the gap is inserted within that block. - * - * @param pos the index at which a gap is inserted. - * @param length gap length. - * @return the length of the inserted gap. - * It might be bigger than length. - */ - public int insertGap(int pos, int length) throws BadBytecode { - return insertGapAt(pos, length, false).length; - } - - /** - * Inserts an exclusive gap - * before the next instruction that would be returned by - * next() (not before the instruction returned - * by the last call to next()). - * Branch offsets and the exception table are also updated. - * The inserted gap is filled with NOP. The gap length may be - * extended to a multiple of 4. - * - *

If the next instruction is at the beginning of a block statement, - * then the gap is excluded from that block. - * - * @param length gap length - * @return the index indicating the first byte of the inserted gap. - */ - public int insertExGap(int length) throws BadBytecode { - return insertGapAt(currentPos, length, true).position; - } - - /** - * Inserts an exclusive gap in front of the instruction at the given - * index pos. - * Branch offsets and the exception table are also updated. - * The inserted gap is filled with NOP. The gap length may be - * extended to a multiple of 4. - * - *

If the instruction at the given index is at the beginning - * of a block statement, - * then the gap is excluded from that block. - * - * @param pos the index at which a gap is inserted. - * @param length gap length. - * @return the length of the inserted gap. - * It might be bigger than length. - */ - public int insertExGap(int pos, int length) throws BadBytecode { - return insertGapAt(pos, length, true).length; - } - - /** - * An inserted gap. - * - * @since 3.11 - */ - public static class Gap { - /** - * The position of the gap. - */ - public int position; - - /** - * The length of the gap. - */ - public int length; - } - - /** - * Inserts an inclusive or exclusive gap in front of the instruction - * at the given index pos. - * Branch offsets and the exception table in the method body - * are also updated. The inserted gap is filled with NOP. - * The gap length may be extended to a multiple of 4. - * - *

Suppose that the instruction at the given index is at the - * beginning of a block statement. If the gap is inclusive, - * then it is included within that block. If the gap is exclusive, - * then it is excluded from that block. - * - *

The index at which the gap is actually inserted - * might be different from pos since some other bytes might be - * inserted at other positions (e.g. to change GOTO - * to GOTO_W). The index is available from the Gap - * object returned by this method. - * - *

Suppose that the gap is inserted at the position of - * the next instruction that would be returned by - * next() (not the last instruction returned - * by the last call to next()). The next - * instruction returned by next() after the gap is - * inserted is still the same instruction. It is not NOP - * at the first byte of the inserted gap. - * - * @param pos the index at which a gap is inserted. - * @param length gap length. - * @param exclusive true if exclusive, otherwise false. - * @return the position and the length of the inserted gap. - * @since 3.11 - */ - public Gap insertGapAt(int pos, int length, boolean exclusive) - throws BadBytecode - { - /** - * cursorPos indicates the next bytecode whichever exclusive is - * true or false. - */ - Gap gap = new Gap(); - if (length <= 0) { - gap.position = pos; - gap.length = 0; - return gap; - } - - byte[] c; - int length2; - if (bytecode.length + length > Short.MAX_VALUE) { - // currentPos might change after calling insertGapCore0w(). - c = insertGapCore0w(bytecode, pos, length, exclusive, - get().getExceptionTable(), codeAttr, gap); - pos = gap.position; - length2 = length; // == gap.length - } - else { - int cur = currentPos; - c = insertGapCore0(bytecode, pos, length, exclusive, - get().getExceptionTable(), codeAttr); - // insertGapCore0() never changes pos. - length2 = c.length - bytecode.length; - gap.position = pos; - gap.length = length2; - if (cur >= pos) - currentPos = cur + length2; - - if (mark > pos || (mark == pos && exclusive)) - mark += length2; - } - - codeAttr.setCode(c); - bytecode = c; - endPos = getCodeLength(); - updateCursors(pos, length2); - return gap; - } - - /** - * Is called when a gap is inserted. The default implementation is empty. - * A subclass can override this method so that cursors will be updated. - * - * @param pos the position where a gap is inserted. - * @param length the length of the gap. - */ - protected void updateCursors(int pos, int length) { - // empty - } - - /** - * Copies and inserts the entries in the given exception table - * at the beginning of the exception table in the code attribute - * edited by this object. - * - * @param offset the value added to the code positions included - * in the entries. - */ - public void insert(ExceptionTable et, int offset) { - codeAttr.getExceptionTable().add(0, et, offset); - } - - /** - * Appends the given bytecode sequence at the end. - * - * @param code the bytecode appended. - * @return the position of the first byte of the appended bytecode. - */ - public int append(byte[] code) { - int size = getCodeLength(); - int len = code.length; - if (len <= 0) - return size; - - appendGap(len); - byte[] dest = bytecode; - for (int i = 0; i < len; ++i) - dest[i + size] = code[i]; - - return size; - } - - /** - * Appends a gap at the end of the bytecode sequence. - * - * @param gapLength gap length - */ - public void appendGap(int gapLength) { - byte[] code = bytecode; - int codeLength = code.length; - byte[] newcode = new byte[codeLength + gapLength]; - - int i; - for (i = 0; i < codeLength; ++i) - newcode[i] = code[i]; - - for (i = codeLength; i < codeLength + gapLength; ++i) - newcode[i] = NOP; - - codeAttr.setCode(newcode); - bytecode = newcode; - endPos = getCodeLength(); - } - - /** - * Copies and appends the entries in the given exception table - * at the end of the exception table in the code attribute - * edited by this object. - * - * @param offset the value added to the code positions included - * in the entries. - */ - public void append(ExceptionTable et, int offset) { - ExceptionTable table = codeAttr.getExceptionTable(); - table.add(table.size(), et, offset); - } - - /* opcodeLegth is used for implementing nextOpcode(). - */ - private static final int opcodeLength[] = { - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 2, 3, - 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, - 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 0, 0, 1, 1, 1, 1, 1, 1, 3, 3, - 3, 3, 3, 3, 3, 5, 5, 3, 2, 3, 1, 1, 3, 3, 1, 1, 0, 4, 3, 3, - 5, 5 - }; - // 0 .. LOOKUPSWITCH, TABLESWITCH, WIDE - - /** - * Calculates the index of the next opcode. - */ - static int nextOpcode(byte[] code, int index) - throws BadBytecode - { - int opcode; - try { - opcode = code[index] & 0xff; - } - catch (IndexOutOfBoundsException e) { - throw new BadBytecode("invalid opcode address"); - } - - try { - int len = opcodeLength[opcode]; - if (len > 0) - return index + len; - else if (opcode == WIDE) - if (code[index + 1] == (byte)IINC) // WIDE IINC - return index + 6; - else - return index + 4; // WIDE ... - else { - int index2 = (index & ~3) + 8; - if (opcode == LOOKUPSWITCH) { - int npairs = ByteArray.read32bit(code, index2); - return index2 + npairs * 8 + 4; - } - else if (opcode == TABLESWITCH) { - int low = ByteArray.read32bit(code, index2); - int high = ByteArray.read32bit(code, index2 + 4); - return index2 + (high - low + 1) * 4 + 8; - } - // else - // throw new BadBytecode(opcode); - } - } - catch (IndexOutOfBoundsException e) { - } - - // opcode is UNUSED or an IndexOutOfBoundsException was thrown. - throw new BadBytecode(opcode); - } - - // methods for implementing insertGap(). - - static class AlignmentException extends Exception {} - - /** - * insertGapCore0() inserts a gap (some NOPs). - * It cannot handle a long code sequence more than 32K. All branch offsets must be - * signed 16bits. - * - * If "where" is the beginning of a block statement and exclusive is false, - * then the inserted gap is also included in the block statement. - * "where" must indicate the first byte of an opcode. - * The inserted gap is filled with NOP. gapLength may be extended to - * a multiple of 4. - * - * This method was also called from CodeAttribute.LdcEntry.doit(). - * - * @param where It must indicate the first byte of an opcode. - */ - static byte[] insertGapCore0(byte[] code, int where, int gapLength, - boolean exclusive, ExceptionTable etable, CodeAttribute ca) - throws BadBytecode - { - if (gapLength <= 0) - return code; - - try { - return insertGapCore1(code, where, gapLength, exclusive, etable, ca); - } - catch (AlignmentException e) { - try { - return insertGapCore1(code, where, (gapLength + 3) & ~3, - exclusive, etable, ca); - } - catch (AlignmentException e2) { - throw new RuntimeException("fatal error?"); - } - } - } - - private static byte[] insertGapCore1(byte[] code, int where, int gapLength, - boolean exclusive, ExceptionTable etable, - CodeAttribute ca) - throws BadBytecode, AlignmentException - { - int codeLength = code.length; - byte[] newcode = new byte[codeLength + gapLength]; - insertGap2(code, where, gapLength, codeLength, newcode, exclusive); - etable.shiftPc(where, gapLength, exclusive); - LineNumberAttribute na - = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); - if (na != null) - na.shiftPc(where, gapLength, exclusive); - - LocalVariableAttribute va = (LocalVariableAttribute)ca.getAttribute( - LocalVariableAttribute.tag); - if (va != null) - va.shiftPc(where, gapLength, exclusive); - - LocalVariableAttribute vta - = (LocalVariableAttribute)ca.getAttribute( - LocalVariableAttribute.typeTag); - if (vta != null) - vta.shiftPc(where, gapLength, exclusive); - - StackMapTable smt = (StackMapTable)ca.getAttribute(StackMapTable.tag); - if (smt != null) - smt.shiftPc(where, gapLength, exclusive); - - StackMap sm = (StackMap)ca.getAttribute(StackMap.tag); - if (sm != null) - sm.shiftPc(where, gapLength, exclusive); - - return newcode; - } - - private static void insertGap2(byte[] code, int where, int gapLength, - int endPos, byte[] newcode, boolean exclusive) - throws BadBytecode, AlignmentException - { - int nextPos; - int i = 0; - int j = 0; - for (; i < endPos; i = nextPos) { - if (i == where) { - int j2 = j + gapLength; - while (j < j2) - newcode[j++] = NOP; - } - - nextPos = nextOpcode(code, i); - int inst = code[i] & 0xff; - // if, if_icmp, if_acmp, goto, jsr - if ((153 <= inst && inst <= 168) - || inst == IFNULL || inst == IFNONNULL) { - /* 2bytes *signed* offset */ - int offset = (code[i + 1] << 8) | (code[i + 2] & 0xff); - offset = newOffset(i, offset, where, gapLength, exclusive); - newcode[j] = code[i]; - ByteArray.write16bit(offset, newcode, j + 1); - j += 3; - } - else if (inst == GOTO_W || inst == JSR_W) { - /* 4bytes offset */ - int offset = ByteArray.read32bit(code, i + 1); - offset = newOffset(i, offset, where, gapLength, exclusive); - newcode[j++] = code[i]; - ByteArray.write32bit(offset, newcode, j); - j += 4; - } - else if (inst == TABLESWITCH) { - if (i != j && (gapLength & 3) != 0) - throw new AlignmentException(); - - int i2 = (i & ~3) + 4; // 0-3 byte padding - // IBM JVM 1.4.2 cannot run the following code: - // int i0 = i; - // while (i0 < i2) - // newcode[j++] = code[i0++]; - // So extracting this code into an external method. - // see JIRA JASSIST-74. - j = copyGapBytes(newcode, j, code, i, i2); - - int defaultbyte = newOffset(i, ByteArray.read32bit(code, i2), - where, gapLength, exclusive); - ByteArray.write32bit(defaultbyte, newcode, j); - int lowbyte = ByteArray.read32bit(code, i2 + 4); - ByteArray.write32bit(lowbyte, newcode, j + 4); - int highbyte = ByteArray.read32bit(code, i2 + 8); - ByteArray.write32bit(highbyte, newcode, j + 8); - j += 12; - int i0 = i2 + 12; - i2 = i0 + (highbyte - lowbyte + 1) * 4; - while (i0 < i2) { - int offset = newOffset(i, ByteArray.read32bit(code, i0), - where, gapLength, exclusive); - ByteArray.write32bit(offset, newcode, j); - j += 4; - i0 += 4; - } - } - else if (inst == LOOKUPSWITCH) { - if (i != j && (gapLength & 3) != 0) - throw new AlignmentException(); - - int i2 = (i & ~3) + 4; // 0-3 byte padding - - // IBM JVM 1.4.2 cannot run the following code: - // int i0 = i; - // while (i0 < i2) - // newcode[j++] = code[i0++]; - // So extracting this code into an external method. - // see JIRA JASSIST-74. - j = copyGapBytes(newcode, j, code, i, i2); - - int defaultbyte = newOffset(i, ByteArray.read32bit(code, i2), - where, gapLength, exclusive); - ByteArray.write32bit(defaultbyte, newcode, j); - int npairs = ByteArray.read32bit(code, i2 + 4); - ByteArray.write32bit(npairs, newcode, j + 4); - j += 8; - int i0 = i2 + 8; - i2 = i0 + npairs * 8; - while (i0 < i2) { - ByteArray.copy32bit(code, i0, newcode, j); - int offset = newOffset(i, - ByteArray.read32bit(code, i0 + 4), - where, gapLength, exclusive); - ByteArray.write32bit(offset, newcode, j + 4); - j += 8; - i0 += 8; - } - } - else - while (i < nextPos) - newcode[j++] = code[i++]; - } - } - - - private static int copyGapBytes(byte[] newcode, int j, byte[] code, int i, int iEnd) { - switch (iEnd - i) { - case 4: - newcode[j++] = code[i++]; - case 3: - newcode[j++] = code[i++]; - case 2: - newcode[j++] = code[i++]; - case 1: - newcode[j++] = code[i++]; - default: - } - - return j; - } - - private static int newOffset(int i, int offset, int where, - int gapLength, boolean exclusive) { - int target = i + offset; - if (i < where) { - if (where < target || (exclusive && where == target)) - offset += gapLength; - } - else if (i == where) { - // This code is different from the code in Branch#shiftOffset(). - // see JASSIST-124. - if (target < where) - offset -= gapLength; - } - else - if (target < where || (!exclusive && where == target)) - offset -= gapLength; - - return offset; - } - - static class Pointers { - int cursor; - int mark0, mark; - ExceptionTable etable; - LineNumberAttribute line; - LocalVariableAttribute vars, types; - StackMapTable stack; - StackMap stack2; - - Pointers(int cur, int m, int m0, ExceptionTable et, CodeAttribute ca) { - cursor = cur; - mark = m; - mark0 = m0; - etable = et; // non null - line = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); - vars = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.tag); - types = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.typeTag); - stack = (StackMapTable)ca.getAttribute(StackMapTable.tag); - stack2 = (StackMap)ca.getAttribute(StackMap.tag); - } - - void shiftPc(int where, int gapLength, boolean exclusive) throws BadBytecode { - if (where < cursor || (where == cursor && exclusive)) - cursor += gapLength; - - if (where < mark || (where == mark && exclusive)) - mark += gapLength; - - if (where < mark0 || (where == mark0 && exclusive)) - mark0 += gapLength; - - etable.shiftPc(where, gapLength, exclusive); - if (line != null) - line.shiftPc(where, gapLength, exclusive); - - if (vars != null) - vars.shiftPc(where, gapLength, exclusive); - - if (types != null) - types.shiftPc(where, gapLength, exclusive); - - if (stack != null) - stack.shiftPc(where, gapLength, exclusive); - - if (stack2 != null) - stack2.shiftPc(where, gapLength, exclusive); - } - - void shiftForSwitch(int where, int gapLength) throws BadBytecode { - if (stack != null) - stack.shiftForSwitch(where, gapLength); - - if (stack2 != null) - stack2.shiftForSwitch(where, gapLength); - } - } - - /* - * This method is called from CodeAttribute.LdcEntry.doit(). - */ - static byte[] changeLdcToLdcW(byte[] code, ExceptionTable etable, - CodeAttribute ca, CodeAttribute.LdcEntry ldcs) - throws BadBytecode - { - Pointers pointers = new Pointers(0, 0, 0, etable, ca); - ArrayList jumps = makeJumpList(code, code.length, pointers); - while (ldcs != null) { - addLdcW(ldcs, jumps); - ldcs = ldcs.next; - } - - byte[] r = insertGap2w(code, 0, 0, false, jumps, pointers); - return r; - } - - private static void addLdcW(CodeAttribute.LdcEntry ldcs, ArrayList jumps) { - int where = ldcs.where; - LdcW ldcw = new LdcW(where, ldcs.index); - int s = jumps.size(); - for (int i = 0; i < s; i++) - if (where < ((Branch)jumps.get(i)).orgPos) { - jumps.add(i, ldcw); - return; - } - - jumps.add(ldcw); - } - - /* - * insertGapCore0w() can handle a long code sequence more than 32K. - * It guarantees that the length of the inserted gap (NOPs) is equal to - * gapLength. No other NOPs except some NOPs following TABLESWITCH or - * LOOKUPSWITCH will not be inserted. - * - * Note: currentPos might be moved. - * - * @param where It must indicate the first byte of an opcode. - * @param newWhere It contains the updated index of the position where a gap - * is inserted and the length of the gap. - * It must not be null. - */ - private byte[] insertGapCore0w(byte[] code, int where, int gapLength, boolean exclusive, - ExceptionTable etable, CodeAttribute ca, Gap newWhere) - throws BadBytecode - { - if (gapLength <= 0) - return code; - - Pointers pointers = new Pointers(currentPos, mark, where, etable, ca); - ArrayList jumps = makeJumpList(code, code.length, pointers); - byte[] r = insertGap2w(code, where, gapLength, exclusive, jumps, pointers); - currentPos = pointers.cursor; - mark = pointers.mark; - int where2 = pointers.mark0; - if (where2 == currentPos && !exclusive) - currentPos += gapLength; - - if (exclusive) - where2 -= gapLength; - - newWhere.position = where2; - newWhere.length = gapLength; - return r; - } - - private static byte[] insertGap2w(byte[] code, int where, int gapLength, - boolean exclusive, ArrayList jumps, Pointers ptrs) - throws BadBytecode - { - int n = jumps.size(); - if (gapLength > 0) { - ptrs.shiftPc(where, gapLength, exclusive); - for (int i = 0; i < n; i++) - ((Branch)jumps.get(i)).shift(where, gapLength, exclusive); - } - - boolean unstable = true; - do { - while (unstable) { - unstable = false; - for (int i = 0; i < n; i++) { - Branch b = (Branch)jumps.get(i); - if (b.expanded()) { - unstable = true; - int p = b.pos; - int delta = b.deltaSize(); - ptrs.shiftPc(p, delta, false); - for (int j = 0; j < n; j++) - ((Branch)jumps.get(j)).shift(p, delta, false); - } - } - } - - for (int i = 0; i < n; i++) { - Branch b = (Branch)jumps.get(i); - int diff = b.gapChanged(); - if (diff > 0) { - unstable = true; - int p = b.pos; - ptrs.shiftPc(p, diff, false); - for (int j = 0; j < n; j++) - ((Branch)jumps.get(j)).shift(p, diff, false); - } - } - } while (unstable); - - return makeExapndedCode(code, jumps, where, gapLength); - } - - private static ArrayList makeJumpList(byte[] code, int endPos, Pointers ptrs) - throws BadBytecode - { - ArrayList jumps = new ArrayList(); - int nextPos; - for (int i = 0; i < endPos; i = nextPos) { - nextPos = nextOpcode(code, i); - int inst = code[i] & 0xff; - // if, if_icmp, if_acmp, goto, jsr - if ((153 <= inst && inst <= 168) - || inst == IFNULL || inst == IFNONNULL) { - /* 2bytes *signed* offset */ - int offset = (code[i + 1] << 8) | (code[i + 2] & 0xff); - Branch b; - if (inst == GOTO || inst == JSR) - b = new Jump16(i, offset); - else - b = new If16(i, offset); - - jumps.add(b); - } - else if (inst == GOTO_W || inst == JSR_W) { - /* 4bytes offset */ - int offset = ByteArray.read32bit(code, i + 1); - jumps.add(new Jump32(i, offset)); - } - else if (inst == TABLESWITCH) { - int i2 = (i & ~3) + 4; // 0-3 byte padding - int defaultbyte = ByteArray.read32bit(code, i2); - int lowbyte = ByteArray.read32bit(code, i2 + 4); - int highbyte = ByteArray.read32bit(code, i2 + 8); - int i0 = i2 + 12; - int size = highbyte - lowbyte + 1; - int[] offsets = new int[size]; - for (int j = 0; j < size; j++) { - offsets[j] = ByteArray.read32bit(code, i0); - i0 += 4; - } - - jumps.add(new Table(i, defaultbyte, lowbyte, highbyte, offsets, ptrs)); - } - else if (inst == LOOKUPSWITCH) { - int i2 = (i & ~3) + 4; // 0-3 byte padding - int defaultbyte = ByteArray.read32bit(code, i2); - int npairs = ByteArray.read32bit(code, i2 + 4); - int i0 = i2 + 8; - int[] matches = new int[npairs]; - int[] offsets = new int[npairs]; - for (int j = 0; j < npairs; j++) { - matches[j] = ByteArray.read32bit(code, i0); - offsets[j] = ByteArray.read32bit(code, i0 + 4); - i0 += 8; - } - - jumps.add(new Lookup(i, defaultbyte, matches, offsets, ptrs)); - } - } - - return jumps; - } - - private static byte[] makeExapndedCode(byte[] code, ArrayList jumps, - int where, int gapLength) - throws BadBytecode - { - int n = jumps.size(); - int size = code.length + gapLength; - for (int i = 0; i < n; i++) { - Branch b = (Branch)jumps.get(i); - size += b.deltaSize(); - } - - byte[] newcode = new byte[size]; - int src = 0, dest = 0, bindex = 0; - int len = code.length; - Branch b; - int bpos; - if (0 < n) { - b = (Branch)jumps.get(0); - bpos = b.orgPos; - } - else { - b = null; - bpos = len; // src will be never equal to bpos - } - - while (src < len) { - if (src == where) { - int pos2 = dest + gapLength; - while (dest < pos2) - newcode[dest++] = NOP; - } - - if (src != bpos) - newcode[dest++] = code[src++]; - else { - int s = b.write(src, code, dest, newcode); - src += s; - dest += s + b.deltaSize(); - if (++bindex < n) { - b = (Branch)jumps.get(bindex); - bpos = b.orgPos; - } - else { - b = null; - bpos = len; - } - } - } - - return newcode; - } - - static abstract class Branch { - int pos, orgPos; - Branch(int p) { pos = orgPos = p; } - void shift(int where, int gapLength, boolean exclusive) { - if (where < pos || (where == pos && exclusive)) - pos += gapLength; - } - - static int shiftOffset(int i, int offset, int where, - int gapLength, boolean exclusive) { - int target = i + offset; - if (i < where) { - if (where < target || (exclusive && where == target)) - offset += gapLength; - } - else if (i == where) { - // This code is different from the code in CodeIterator#newOffset(). - // see JASSIST-124. - if (target < where && exclusive) - offset -= gapLength; - else if (where < target && !exclusive) - offset += gapLength; - } - else - if (target < where || (!exclusive && where == target)) - offset -= gapLength; - - return offset; - } - - boolean expanded() { return false; } - int gapChanged() { return 0; } - int deltaSize() { return 0; } // newSize - oldSize - - // This returns the original instruction size. - abstract int write(int srcPos, byte[] code, int destPos, byte[] newcode) throws BadBytecode; - } - - /* used by changeLdcToLdcW() and CodeAttribute.LdcEntry. - */ - static class LdcW extends Branch { - int index; - boolean state; - LdcW(int p, int i) { - super(p); - index = i; - state = true; - } - - boolean expanded() { - if (state) { - state = false; - return true; - } - else - return false; - } - - int deltaSize() { return 1; } - - int write(int srcPos, byte[] code, int destPos, byte[] newcode) { - newcode[destPos] = LDC_W; - ByteArray.write16bit(index, newcode, destPos + 1); - return 2; - } - } - - static abstract class Branch16 extends Branch { - int offset; - int state; - static final int BIT16 = 0; - static final int EXPAND = 1; - static final int BIT32 = 2; - - Branch16(int p, int off) { - super(p); - offset = off; - state = BIT16; - } - - void shift(int where, int gapLength, boolean exclusive) { - offset = shiftOffset(pos, offset, where, gapLength, exclusive); - super.shift(where, gapLength, exclusive); - if (state == BIT16) - if (offset < Short.MIN_VALUE || Short.MAX_VALUE < offset) - state = EXPAND; - } - - boolean expanded() { - if (state == EXPAND) { - state = BIT32; - return true; - } - else - return false; - } - - abstract int deltaSize(); - abstract void write32(int src, byte[] code, int dest, byte[] newcode); - - int write(int src, byte[] code, int dest, byte[] newcode) { - if (state == BIT32) - write32(src, code, dest, newcode); - else { - newcode[dest] = code[src]; - ByteArray.write16bit(offset, newcode, dest + 1); - } - - return 3; - } - } - - // GOTO or JSR - static class Jump16 extends Branch16 { - Jump16(int p, int off) { - super(p, off); - } - - int deltaSize() { - return state == BIT32 ? 2 : 0; - } - - void write32(int src, byte[] code, int dest, byte[] newcode) { - newcode[dest] = (byte)(((code[src] & 0xff) == GOTO) ? GOTO_W : JSR_W); - ByteArray.write32bit(offset, newcode, dest + 1); - } - } - - // if, if_icmp, or if_acmp - static class If16 extends Branch16 { - If16(int p, int off) { - super(p, off); - } - - int deltaSize() { - return state == BIT32 ? 5 : 0; - } - - void write32(int src, byte[] code, int dest, byte[] newcode) { - newcode[dest] = (byte)opcode(code[src] & 0xff); - newcode[dest + 1] = 0; - newcode[dest + 2] = 8; // branch_offset = 8 - newcode[dest + 3] = (byte)GOTO_W; - ByteArray.write32bit(offset - 3, newcode, dest + 4); - } - - int opcode(int op) { - if (op == IFNULL) - return IFNONNULL; - else if (op == IFNONNULL) - return IFNULL; - else { - if (((op - IFEQ) & 1) == 0) - return op + 1; - else - return op - 1; - } - } - } - - static class Jump32 extends Branch { - int offset; - - Jump32(int p, int off) { - super(p); - offset = off; - } - - void shift(int where, int gapLength, boolean exclusive) { - offset = shiftOffset(pos, offset, where, gapLength, exclusive); - super.shift(where, gapLength, exclusive); - } - - int write(int src, byte[] code, int dest, byte[] newcode) { - newcode[dest] = code[src]; - ByteArray.write32bit(offset, newcode, dest + 1); - return 5; - } - } - - static abstract class Switcher extends Branch { - int gap, defaultByte; - int[] offsets; - Pointers pointers; - - Switcher(int pos, int defaultByte, int[] offsets, Pointers ptrs) { - super(pos); - this.gap = 3 - (pos & 3); - this.defaultByte = defaultByte; - this.offsets = offsets; - this.pointers = ptrs; - } - - void shift(int where, int gapLength, boolean exclusive) { - int p = pos; - defaultByte = shiftOffset(p, defaultByte, where, gapLength, exclusive); - int num = offsets.length; - for (int i = 0; i < num; i++) - offsets[i] = shiftOffset(p, offsets[i], where, gapLength, exclusive); - - super.shift(where, gapLength, exclusive); - } - - int gapChanged() { - int newGap = 3 - (pos & 3); - if (newGap > gap) { - int diff = newGap - gap; - gap = newGap; - return diff; - } - - return 0; - } - - int deltaSize() { - return gap - (3 - (orgPos & 3)); - } - - int write(int src, byte[] code, int dest, byte[] newcode) throws BadBytecode { - int padding = 3 - (pos & 3); - int nops = gap - padding; - int bytecodeSize = 5 + (3 - (orgPos & 3)) + tableSize(); - if (nops > 0) - adjustOffsets(bytecodeSize, nops); - - newcode[dest++] = code[src]; - while (padding-- > 0) - newcode[dest++] = 0; - - ByteArray.write32bit(defaultByte, newcode, dest); - int size = write2(dest + 4, newcode); - dest += size + 4; - while (nops-- > 0) - newcode[dest++] = NOP; - - return 5 + (3 - (orgPos & 3)) + size; - } - - abstract int write2(int dest, byte[] newcode); - abstract int tableSize(); - - /* If the new bytecode size is shorter than the original, some NOPs - * are appended after this branch instruction (tableswitch or - * lookupswitch) to fill the gap. - * This method changes a branch offset to point to the first NOP - * if the offset originally points to the bytecode next to this - * branch instruction. Otherwise, the bytecode would contain - * dead code. It complicates the generation of StackMap and - * StackMapTable. - */ - void adjustOffsets(int size, int nops) throws BadBytecode { - pointers.shiftForSwitch(pos + size, nops); - if (defaultByte == size) - defaultByte -= nops; - - for (int i = 0; i < offsets.length; i++) - if (offsets[i] == size) - offsets[i] -= nops; - } - } - - static class Table extends Switcher { - int low, high; - - Table(int pos, int defaultByte, int low, int high, int[] offsets, Pointers ptrs) { - super(pos, defaultByte, offsets, ptrs); - this.low = low; - this.high = high; - } - - int write2(int dest, byte[] newcode) { - ByteArray.write32bit(low, newcode, dest); - ByteArray.write32bit(high, newcode, dest + 4); - int n = offsets.length; - dest += 8; - for (int i = 0; i < n; i++) { - ByteArray.write32bit(offsets[i], newcode, dest); - dest += 4; - } - - return 8 + 4 * n; - } - - int tableSize() { return 8 + 4 * offsets.length; } - } - - static class Lookup extends Switcher { - int[] matches; - - Lookup(int pos, int defaultByte, int[] matches, int[] offsets, Pointers ptrs) { - super(pos, defaultByte, offsets, ptrs); - this.matches = matches; - } - - int write2(int dest, byte[] newcode) { - int n = matches.length; - ByteArray.write32bit(n, newcode, dest); - dest += 4; - for (int i = 0; i < n; i++) { - ByteArray.write32bit(matches[i], newcode, dest); - ByteArray.write32bit(offsets[i], newcode, dest + 4); - dest += 8; - } - - return 4 + 8 * n; - } - - int tableSize() { return 4 + 8 * matches.length; } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ConstPool.java b/src/com/wenshuo/agent/javassist/bytecode/ConstPool.java deleted file mode 100644 index a7d94ae..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ConstPool.java +++ /dev/null @@ -1,1995 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.ByteArrayOutputStream; -import java.io.PrintWriter; -import java.io.IOException; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Map; -import java.util.Set; - -import com.wenshuo.agent.javassist.CtClass; - -/** - * Constant pool table. - */ -public final class ConstPool { - LongVector items; - int numOfItems; - int thisClassInfo; - HashMap itemsCache; - - /** - * CONSTANT_Class - */ - public static final int CONST_Class = ClassInfo.tag; - - /** - * CONSTANT_Fieldref - */ - public static final int CONST_Fieldref = FieldrefInfo.tag; - - /** - * CONSTANT_Methodref - */ - public static final int CONST_Methodref = MethodrefInfo.tag; - - /** - * CONSTANT_InterfaceMethodref - */ - public static final int CONST_InterfaceMethodref - = InterfaceMethodrefInfo.tag; - - /** - * CONSTANT_String - */ - public static final int CONST_String = StringInfo.tag; - - /** - * CONSTANT_Integer - */ - public static final int CONST_Integer = IntegerInfo.tag; - - /** - * CONSTANT_Float - */ - public static final int CONST_Float = FloatInfo.tag; - - /** - * CONSTANT_Long - */ - public static final int CONST_Long = LongInfo.tag; - - /** - * CONSTANT_Double - */ - public static final int CONST_Double = DoubleInfo.tag; - - /** - * CONSTANT_NameAndType - */ - public static final int CONST_NameAndType = NameAndTypeInfo.tag; - - /** - * CONSTANT_Utf8 - */ - public static final int CONST_Utf8 = Utf8Info.tag; - - /** - * CONSTANT_MethodHandle - */ - public static final int CONST_MethodHandle = MethodHandleInfo.tag; - - /** - * CONSTANT_MethodHandle - */ - public static final int CONST_MethodType = MethodTypeInfo.tag; - - /** - * CONSTANT_MethodHandle - */ - public static final int CONST_InvokeDynamic = InvokeDynamicInfo.tag; - - /** - * Represents the class using this constant pool table. - */ - public static final CtClass THIS = null; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_getField = 1; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_getStatic = 2; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_putField = 3; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_putStatic = 4; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_invokeVirtual = 5; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_invokeStatic = 6; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_invokeSpecial = 7; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_newInvokeSpecial = 8; - - /** - * reference_kind of CONSTANT_MethodHandle_info. - */ - public static final int REF_invokeInterface = 9; - - /** - * Constructs a constant pool table. - * - * @param thisclass the name of the class using this constant - * pool table - */ - public ConstPool(String thisclass) { - items = new LongVector(); - itemsCache = null; - numOfItems = 0; - addItem0(null); // index 0 is reserved by the JVM. - thisClassInfo = addClassInfo(thisclass); - } - - /** - * Constructs a constant pool table from the given byte stream. - * - * @param in byte stream. - */ - public ConstPool(DataInputStream in) throws IOException { - itemsCache = null; - thisClassInfo = 0; - /* read() initializes items and numOfItems, and do addItem(null). - */ - read(in); - } - - void prune() { - itemsCache = null; - } - - /** - * Returns the number of entries in this table. - */ - public int getSize() { - return numOfItems; - } - - /** - * Returns the name of the class using this constant pool table. - */ - public String getClassName() { - return getClassInfo(thisClassInfo); - } - - /** - * Returns the index of CONSTANT_Class_info structure - * specifying the class using this constant pool table. - */ - public int getThisClassInfo() { - return thisClassInfo; - } - - void setThisClassInfo(int i) { - thisClassInfo = i; - } - - ConstInfo getItem(int n) { - return items.elementAt(n); - } - - /** - * Returns the tag field of the constant pool table - * entry at the given index. - */ - public int getTag(int index) { - return getItem(index).getTag(); - } - - /** - * Reads CONSTANT_Class_info structure - * at the given index. - * - * @return a fully-qualified class or interface name specified - * by name_index. If the type is an array - * type, this method returns an encoded name like - * [Ljava.lang.Object; (note that the separators - * are not slashes but dots). - * @see javassist.ClassPool#getCtClass(String) - */ - public String getClassInfo(int index) { - ClassInfo c = (ClassInfo)getItem(index); - if (c == null) - return null; - else - return Descriptor.toJavaName(getUtf8Info(c.name)); - } - - /** - * Reads CONSTANT_Class_info structure - * at the given index. - * - * @return the descriptor of the type specified - * by name_index. - * @see javassist.ClassPool#getCtClass(String) - * @since 3.15 - */ - public String getClassInfoByDescriptor(int index) { - ClassInfo c = (ClassInfo)getItem(index); - if (c == null) - return null; - else { - String className = getUtf8Info(c.name); - if (className.charAt(0) == '[') - return className; - else - return Descriptor.of(className); - } - } - - /** - * Reads the name_index field of the - * CONSTANT_NameAndType_info structure - * at the given index. - */ - public int getNameAndTypeName(int index) { - NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index); - return ntinfo.memberName; - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_NameAndType_info structure - * at the given index. - */ - public int getNameAndTypeDescriptor(int index) { - NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index); - return ntinfo.typeDescriptor; - } - - /** - * Reads the class_index field of the - * CONSTANT_Fieldref_info, - * CONSTANT_Methodref_info, - * or CONSTANT_Interfaceref_info, - * structure at the given index. - * - * @since 3.6 - */ - public int getMemberClass(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.classIndex; - } - - /** - * Reads the name_and_type_index field of the - * CONSTANT_Fieldref_info, - * CONSTANT_Methodref_info, - * or CONSTANT_Interfaceref_info, - * structure at the given index. - * - * @since 3.6 - */ - public int getMemberNameAndType(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.nameAndTypeIndex; - } - - /** - * Reads the class_index field of the - * CONSTANT_Fieldref_info structure - * at the given index. - */ - public int getFieldrefClass(int index) { - FieldrefInfo finfo = (FieldrefInfo)getItem(index); - return finfo.classIndex; - } - - /** - * Reads the class_index field of the - * CONSTANT_Fieldref_info structure - * at the given index. - * - * @return the name of the class at that class_index. - */ - public String getFieldrefClassName(int index) { - FieldrefInfo f = (FieldrefInfo)getItem(index); - if (f == null) - return null; - else - return getClassInfo(f.classIndex); - } - - /** - * Reads the name_and_type_index field of the - * CONSTANT_Fieldref_info structure - * at the given index. - */ - public int getFieldrefNameAndType(int index) { - FieldrefInfo finfo = (FieldrefInfo)getItem(index); - return finfo.nameAndTypeIndex; - } - - /** - * Reads the name_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to a CONSTANT_Fieldref_info. - * @return the name of the field. - */ - public String getFieldrefName(int index) { - FieldrefInfo f = (FieldrefInfo)getItem(index); - if (f == null) - return null; - else { - NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.memberName); - } - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to a CONSTANT_Fieldref_info. - * @return the type descriptor of the field. - */ - public String getFieldrefType(int index) { - FieldrefInfo f = (FieldrefInfo)getItem(index); - if (f == null) - return null; - else { - NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.typeDescriptor); - } - } - - /** - * Reads the class_index field of the - * CONSTANT_Methodref_info structure - * at the given index. - */ - public int getMethodrefClass(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.classIndex; - } - - /** - * Reads the class_index field of the - * CONSTANT_Methodref_info structure - * at the given index. - * - * @return the name of the class at that class_index. - */ - public String getMethodrefClassName(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (minfo == null) - return null; - else - return getClassInfo(minfo.classIndex); - } - - /** - * Reads the name_and_type_index field of the - * CONSTANT_Methodref_info structure - * at the given index. - */ - public int getMethodrefNameAndType(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.nameAndTypeIndex; - } - - /** - * Reads the name_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to a CONSTANT_Methodref_info. - * @return the name of the method. - */ - public String getMethodrefName(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (minfo == null) - return null; - else { - NameAndTypeInfo n - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.memberName); - } - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to a CONSTANT_Methodref_info. - * @return the descriptor of the method. - */ - public String getMethodrefType(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (minfo == null) - return null; - else { - NameAndTypeInfo n - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.typeDescriptor); - } - } - - /** - * Reads the class_index field of the - * CONSTANT_InterfaceMethodref_info structure - * at the given index. - */ - public int getInterfaceMethodrefClass(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.classIndex; - } - - /** - * Reads the class_index field of the - * CONSTANT_InterfaceMethodref_info structure - * at the given index. - * - * @return the name of the class at that class_index. - */ - public String getInterfaceMethodrefClassName(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return getClassInfo(minfo.classIndex); - } - - /** - * Reads the name_and_type_index field of the - * CONSTANT_InterfaceMethodref_info structure - * at the given index. - */ - public int getInterfaceMethodrefNameAndType(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - return minfo.nameAndTypeIndex; - } - - /** - * Reads the name_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to - * a CONSTANT_InterfaceMethodref_info. - * @return the name of the method. - */ - public String getInterfaceMethodrefName(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (minfo == null) - return null; - else { - NameAndTypeInfo n - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.memberName); - } - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to - * a CONSTANT_InterfaceMethodref_info. - * @return the descriptor of the method. - */ - public String getInterfaceMethodrefType(int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (minfo == null) - return null; - else { - NameAndTypeInfo n - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if(n == null) - return null; - else - return getUtf8Info(n.typeDescriptor); - } - } - /** - * Reads CONSTANT_Integer_info, _Float_info, - * _Long_info, _Double_info, or - * _String_info structure. - * These are used with the LDC instruction. - * - * @return a String value or a wrapped primitive-type - * value. - */ - public Object getLdcValue(int index) { - ConstInfo constInfo = this.getItem(index); - Object value = null; - if (constInfo instanceof StringInfo) - value = this.getStringInfo(index); - else if (constInfo instanceof FloatInfo) - value = new Float(getFloatInfo(index)); - else if (constInfo instanceof IntegerInfo) - value = new Integer(getIntegerInfo(index)); - else if (constInfo instanceof LongInfo) - value = new Long(getLongInfo(index)); - else if (constInfo instanceof DoubleInfo) - value = new Double(getDoubleInfo(index)); - else - value = null; - - return value; - } - - /** - * Reads CONSTANT_Integer_info structure - * at the given index. - * - * @return the value specified by this entry. - */ - public int getIntegerInfo(int index) { - IntegerInfo i = (IntegerInfo)getItem(index); - return i.value; - } - - /** - * Reads CONSTANT_Float_info structure - * at the given index. - * - * @return the value specified by this entry. - */ - public float getFloatInfo(int index) { - FloatInfo i = (FloatInfo)getItem(index); - return i.value; - } - - /** - * Reads CONSTANT_Long_info structure - * at the given index. - * - * @return the value specified by this entry. - */ - public long getLongInfo(int index) { - LongInfo i = (LongInfo)getItem(index); - return i.value; - } - - /** - * Reads CONSTANT_Double_info structure - * at the given index. - * - * @return the value specified by this entry. - */ - public double getDoubleInfo(int index) { - DoubleInfo i = (DoubleInfo)getItem(index); - return i.value; - } - - /** - * Reads CONSTANT_String_info structure - * at the given index. - * - * @return the string specified by string_index. - */ - public String getStringInfo(int index) { - StringInfo si = (StringInfo)getItem(index); - return getUtf8Info(si.string); - } - - /** - * Reads CONSTANT_utf8_info structure - * at the given index. - * - * @return the string specified by this entry. - */ - public String getUtf8Info(int index) { - Utf8Info utf = (Utf8Info)getItem(index); - return utf.string; - } - - /** - * Reads the reference_kind field of the - * CONSTANT_MethodHandle_info structure - * at the given index. - * - * @see #REF_getField - * @see #REF_getStatic - * @see #REF_invokeInterface - * @see #REF_invokeSpecial - * @see #REF_invokeStatic - * @see #REF_invokeVirtual - * @see #REF_newInvokeSpecial - * @see #REF_putField - * @see #REF_putStatic - * @since 3.17 - */ - public int getMethodHandleKind(int index) { - MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index); - return mhinfo.refKind; - } - - /** - * Reads the reference_index field of the - * CONSTANT_MethodHandle_info structure - * at the given index. - * - * @since 3.17 - */ - public int getMethodHandleIndex(int index) { - MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index); - return mhinfo.refIndex; - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_MethodType_info structure - * at the given index. - * - * @since 3.17 - */ - public int getMethodTypeInfo(int index) { - MethodTypeInfo mtinfo = (MethodTypeInfo)getItem(index); - return mtinfo.descriptor; - } - - /** - * Reads the bootstrap_method_attr_index field of the - * CONSTANT_InvokeDynamic_info structure - * at the given index. - * - * @since 3.17 - */ - public int getInvokeDynamicBootstrap(int index) { - InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); - return iv.bootstrap; - } - - /** - * Reads the name_and_type_index field of the - * CONSTANT_InvokeDynamic_info structure - * at the given index. - * - * @since 3.17 - */ - public int getInvokeDynamicNameAndType(int index) { - InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); - return iv.nameAndType; - } - - /** - * Reads the descriptor_index field of the - * CONSTANT_NameAndType_info structure - * indirectly specified by the given index. - * - * @param index an index to a CONSTANT_InvokeDynamic_info. - * @return the descriptor of the method. - * @since 3.17 - */ - public String getInvokeDynamicType(int index) { - InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); - if (iv == null) - return null; - else { - NameAndTypeInfo n = (NameAndTypeInfo)getItem(iv.nameAndType); - if(n == null) - return null; - else - return getUtf8Info(n.typeDescriptor); - } - } - - /** - * Determines whether CONSTANT_Methodref_info - * structure at the given index represents the constructor - * of the given class. - * - * @return the descriptor_index specifying - * the type descriptor of the that constructor. - * If it is not that constructor, - * isConstructor() returns 0. - */ - public int isConstructor(String classname, int index) { - return isMember(classname, MethodInfo.nameInit, index); - } - - /** - * Determines whether CONSTANT_Methodref_info, - * CONSTANT_Fieldref_info, or - * CONSTANT_InterfaceMethodref_info structure - * at the given index represents the member with the specified - * name and declaring class. - * - * @param classname the class declaring the member - * @param membername the member name - * @param index the index into the constant pool table - * - * @return the descriptor_index specifying - * the type descriptor of that member. - * If it is not that member, - * isMember() returns 0. - */ - public int isMember(String classname, String membername, int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - if (getClassInfo(minfo.classIndex).equals(classname)) { - NameAndTypeInfo ntinfo - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if (getUtf8Info(ntinfo.memberName).equals(membername)) - return ntinfo.typeDescriptor; - } - - return 0; // false - } - - /** - * Determines whether CONSTANT_Methodref_info, - * CONSTANT_Fieldref_info, or - * CONSTANT_InterfaceMethodref_info structure - * at the given index has the name and the descriptor - * given as the arguments. - * - * @param membername the member name - * @param desc the descriptor of the member. - * @param index the index into the constant pool table - * - * @return the name of the target class specified by - * the ..._info structure - * at index. - * Otherwise, null if that structure does not - * match the given member name and descriptor. - */ - public String eqMember(String membername, String desc, int index) { - MemberrefInfo minfo = (MemberrefInfo)getItem(index); - NameAndTypeInfo ntinfo - = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); - if (getUtf8Info(ntinfo.memberName).equals(membername) - && getUtf8Info(ntinfo.typeDescriptor).equals(desc)) - return getClassInfo(minfo.classIndex); - else - return null; // false - } - - private int addItem0(ConstInfo info) { - items.addElement(info); - return numOfItems++; - } - - private int addItem(ConstInfo info) { - if (itemsCache == null) - itemsCache = makeItemsCache(items); - - ConstInfo found = (ConstInfo)itemsCache.get(info); - if (found != null) - return found.index; - else { - items.addElement(info); - itemsCache.put(info, info); - return numOfItems++; - } - } - - /** - * Copies the n-th item in this ConstPool object into the destination - * ConstPool object. - * The class names that the item refers to are renamed according - * to the given map. - * - * @param n the n-th item - * @param dest destination constant pool table - * @param classnames the map or null. - * @return the index of the copied item into the destination ClassPool. - */ - public int copy(int n, ConstPool dest, Map classnames) { - if (n == 0) - return 0; - - ConstInfo info = getItem(n); - return info.copy(this, dest, classnames); - } - - int addConstInfoPadding() { - return addItem0(new ConstInfoPadding(numOfItems)); - } - - /** - * Adds a new CONSTANT_Class_info structure. - * - *

This also adds a CONSTANT_Utf8_info structure - * for storing the class name. - * - * @return the index of the added entry. - */ - public int addClassInfo(CtClass c) { - if (c == THIS) - return thisClassInfo; - else if (!c.isArray()) - return addClassInfo(c.getName()); - else { - // an array type is recorded in the hashtable with - // the key "[L;" instead of "". - // - // note: toJvmName(toJvmName(c)) is equal to toJvmName(c). - - return addClassInfo(Descriptor.toJvmName(c)); - } - } - - /** - * Adds a new CONSTANT_Class_info structure. - * - *

This also adds a CONSTANT_Utf8_info structure - * for storing the class name. - * - * @param qname a fully-qualified class name - * (or the JVM-internal representation of that name). - * @return the index of the added entry. - */ - public int addClassInfo(String qname) { - int utf8 = addUtf8Info(Descriptor.toJvmName(qname)); - return addItem(new ClassInfo(utf8, numOfItems)); - } - - /** - * Adds a new CONSTANT_NameAndType_info structure. - * - *

This also adds CONSTANT_Utf8_info structures. - * - * @param name name_index - * @param type descriptor_index - * @return the index of the added entry. - */ - public int addNameAndTypeInfo(String name, String type) { - return addNameAndTypeInfo(addUtf8Info(name), addUtf8Info(type)); - } - - /** - * Adds a new CONSTANT_NameAndType_info structure. - * - * @param name name_index - * @param type descriptor_index - * @return the index of the added entry. - */ - public int addNameAndTypeInfo(int name, int type) { - return addItem(new NameAndTypeInfo(name, type, numOfItems)); - } - - /** - * Adds a new CONSTANT_Fieldref_info structure. - * - *

This also adds a new CONSTANT_NameAndType_info - * structure. - * - * @param classInfo class_index - * @param name name_index - * of CONSTANT_NameAndType_info. - * @param type descriptor_index - * of CONSTANT_NameAndType_info. - * @return the index of the added entry. - */ - public int addFieldrefInfo(int classInfo, String name, String type) { - int nt = addNameAndTypeInfo(name, type); - return addFieldrefInfo(classInfo, nt); - } - - /** - * Adds a new CONSTANT_Fieldref_info structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addFieldrefInfo(int classInfo, int nameAndTypeInfo) { - return addItem(new FieldrefInfo(classInfo, nameAndTypeInfo, numOfItems)); - } - - /** - * Adds a new CONSTANT_Methodref_info structure. - * - *

This also adds a new CONSTANT_NameAndType_info - * structure. - * - * @param classInfo class_index - * @param name name_index - * of CONSTANT_NameAndType_info. - * @param type descriptor_index - * of CONSTANT_NameAndType_info. - * @return the index of the added entry. - */ - public int addMethodrefInfo(int classInfo, String name, String type) { - int nt = addNameAndTypeInfo(name, type); - return addMethodrefInfo(classInfo, nt); - } - - /** - * Adds a new CONSTANT_Methodref_info structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addMethodrefInfo(int classInfo, int nameAndTypeInfo) { - return addItem(new MethodrefInfo(classInfo, nameAndTypeInfo, numOfItems)); - } - - /** - * Adds a new CONSTANT_InterfaceMethodref_info - * structure. - * - *

This also adds a new CONSTANT_NameAndType_info - * structure. - * - * @param classInfo class_index - * @param name name_index - * of CONSTANT_NameAndType_info. - * @param type descriptor_index - * of CONSTANT_NameAndType_info. - * @return the index of the added entry. - */ - public int addInterfaceMethodrefInfo(int classInfo, String name, - String type) { - int nt = addNameAndTypeInfo(name, type); - return addInterfaceMethodrefInfo(classInfo, nt); - } - - /** - * Adds a new CONSTANT_InterfaceMethodref_info - * structure. - * - * @param classInfo class_index - * @param nameAndTypeInfo name_and_type_index. - * @return the index of the added entry. - */ - public int addInterfaceMethodrefInfo(int classInfo, - int nameAndTypeInfo) { - return addItem(new InterfaceMethodrefInfo(classInfo, nameAndTypeInfo, - numOfItems)); - } - - /** - * Adds a new CONSTANT_String_info - * structure. - * - *

This also adds a new CONSTANT_Utf8_info - * structure. - * - * @return the index of the added entry. - */ - public int addStringInfo(String str) { - int utf = addUtf8Info(str); - return addItem(new StringInfo(utf, numOfItems)); - } - - /** - * Adds a new CONSTANT_Integer_info - * structure. - * - * @return the index of the added entry. - */ - public int addIntegerInfo(int i) { - return addItem(new IntegerInfo(i, numOfItems)); - } - - /** - * Adds a new CONSTANT_Float_info - * structure. - * - * @return the index of the added entry. - */ - public int addFloatInfo(float f) { - return addItem(new FloatInfo(f, numOfItems)); - } - - /** - * Adds a new CONSTANT_Long_info - * structure. - * - * @return the index of the added entry. - */ - public int addLongInfo(long l) { - int i = addItem(new LongInfo(l, numOfItems)); - if (i == numOfItems - 1) // if not existing - addConstInfoPadding(); - - return i; - } - - /** - * Adds a new CONSTANT_Double_info - * structure. - * - * @return the index of the added entry. - */ - public int addDoubleInfo(double d) { - int i = addItem(new DoubleInfo(d, numOfItems)); - if (i == numOfItems - 1) // if not existing - addConstInfoPadding(); - - return i; - } - - /** - * Adds a new CONSTANT_Utf8_info - * structure. - * - * @return the index of the added entry. - */ - public int addUtf8Info(String utf8) { - return addItem(new Utf8Info(utf8, numOfItems)); - } - - /** - * Adds a new CONSTANT_MethodHandle_info - * structure. - * - * @param kind reference_kind - * such as {@link #REF_invokeStatic REF_invokeStatic}. - * @param index reference_index. - * @return the index of the added entry. - * - * @since 3.17 - */ - public int addMethodHandleInfo(int kind, int index) { - return addItem(new MethodHandleInfo(kind, index, numOfItems)); - } - - /** - * Adds a new CONSTANT_MethodType_info - * structure. - * - * @param desc descriptor_index. - * @return the index of the added entry. - * - * @since 3.17 - */ - public int addMethodTypeInfo(int desc) { - return addItem(new MethodTypeInfo(desc, numOfItems)); - } - - /** - * Adds a new CONSTANT_InvokeDynamic_info - * structure. - * - * @param bootstrap bootstrap_method_attr_index. - * @param nameAndType name_and_type_index. - * @return the index of the added entry. - * - * @since 3.17 - */ - public int addInvokeDynamicInfo(int bootstrap, int nameAndType) { - return addItem(new InvokeDynamicInfo(bootstrap, nameAndType, numOfItems)); - } - - /** - * Get all the class names. - * - * @return a set of class names (String objects). - */ - public Set getClassNames() { - HashSet result = new HashSet(); - LongVector v = items; - int size = numOfItems; - for (int i = 1; i < size; ++i) { - String className = v.elementAt(i).getClassName(this); - if (className != null) - result.add(className); - } - return result; - } - - /** - * Replaces all occurrences of a class name. - * - * @param oldName the replaced name (JVM-internal representation). - * @param newName the substituted name (JVM-internal representation). - */ - public void renameClass(String oldName, String newName) { - LongVector v = items; - int size = numOfItems; - for (int i = 1; i < size; ++i) { - ConstInfo ci = v.elementAt(i); - ci.renameClass(this, oldName, newName, itemsCache); - } - } - - /** - * Replaces all occurrences of class names. - * - * @param classnames specifies pairs of replaced and substituted - * name. - */ - public void renameClass(Map classnames) { - LongVector v = items; - int size = numOfItems; - for (int i = 1; i < size; ++i) { - ConstInfo ci = v.elementAt(i); - ci.renameClass(this, classnames, itemsCache); - } - } - - private void read(DataInputStream in) throws IOException { - int n = in.readUnsignedShort(); - - items = new LongVector(n); - numOfItems = 0; - addItem0(null); // index 0 is reserved by the JVM. - - while (--n > 0) { // index 0 is reserved by JVM - int tag = readOne(in); - if ((tag == LongInfo.tag) || (tag == DoubleInfo.tag)) { - addConstInfoPadding(); - --n; - } - } - } - - private static HashMap makeItemsCache(LongVector items) { - HashMap cache = new HashMap(); - int i = 1; - while (true) { - ConstInfo info = items.elementAt(i++); - if (info == null) - break; - else - cache.put(info, info); - } - - return cache; - } - - private int readOne(DataInputStream in) throws IOException { - ConstInfo info; - int tag = in.readUnsignedByte(); - switch (tag) { - case Utf8Info.tag : // 1 - info = new Utf8Info(in, numOfItems); - break; - case IntegerInfo.tag : // 3 - info = new IntegerInfo(in, numOfItems); - break; - case FloatInfo.tag : // 4 - info = new FloatInfo(in, numOfItems); - break; - case LongInfo.tag : // 5 - info = new LongInfo(in, numOfItems); - break; - case DoubleInfo.tag : // 6 - info = new DoubleInfo(in, numOfItems); - break; - case ClassInfo.tag : // 7 - info = new ClassInfo(in, numOfItems); - break; - case StringInfo.tag : // 8 - info = new StringInfo(in, numOfItems); - break; - case FieldrefInfo.tag : // 9 - info = new FieldrefInfo(in, numOfItems); - break; - case MethodrefInfo.tag : // 10 - info = new MethodrefInfo(in, numOfItems); - break; - case InterfaceMethodrefInfo.tag : // 11 - info = new InterfaceMethodrefInfo(in, numOfItems); - break; - case NameAndTypeInfo.tag : // 12 - info = new NameAndTypeInfo(in, numOfItems); - break; - case MethodHandleInfo.tag : // 15 - info = new MethodHandleInfo(in, numOfItems); - break; - case MethodTypeInfo.tag : // 16 - info = new MethodTypeInfo(in, numOfItems); - break; - case InvokeDynamicInfo.tag : // 18 - info = new InvokeDynamicInfo(in, numOfItems); - break; - default : - throw new IOException("invalid constant type: " + tag + " at " + numOfItems); - } - - addItem0(info); - return tag; - } - - /** - * Writes the contents of the constant pool table. - */ - public void write(DataOutputStream out) throws IOException { - out.writeShort(numOfItems); - LongVector v = items; - int size = numOfItems; - for (int i = 1; i < size; ++i) - v.elementAt(i).write(out); - } - - /** - * Prints the contents of the constant pool table. - */ - public void print() { - print(new PrintWriter(System.out, true)); - } - - /** - * Prints the contents of the constant pool table. - */ - public void print(PrintWriter out) { - int size = numOfItems; - for (int i = 1; i < size; ++i) { - out.print(i); - out.print(" "); - items.elementAt(i).print(out); - } - } -} - -abstract class ConstInfo { - int index; - - public ConstInfo(int i) { index = i; } - - public abstract int getTag(); - - public String getClassName(ConstPool cp) { return null; } - public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) {} - public void renameClass(ConstPool cp, Map classnames, HashMap cache) {} - public abstract int copy(ConstPool src, ConstPool dest, Map classnames); - // ** classnames is a mapping between JVM names. - - public abstract void write(DataOutputStream out) throws IOException; - public abstract void print(PrintWriter out); - - public String toString() { - ByteArrayOutputStream bout = new ByteArrayOutputStream(); - PrintWriter out = new PrintWriter(bout); - print(out); - return bout.toString(); - } -} - -/* padding following DoubleInfo or LongInfo. - */ -class ConstInfoPadding extends ConstInfo { - public ConstInfoPadding(int i) { super(i); } - - public int getTag() { return 0; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addConstInfoPadding(); - } - - public void write(DataOutputStream out) throws IOException {} - - public void print(PrintWriter out) { - out.println("padding"); - } -} - -class ClassInfo extends ConstInfo { - static final int tag = 7; - int name; - - public ClassInfo(int className, int index) { - super(index); - name = className; - } - - public ClassInfo(DataInputStream in, int index) throws IOException { - super(index); - name = in.readUnsignedShort(); - } - - public int hashCode() { return name; } - - public boolean equals(Object obj) { - return obj instanceof ClassInfo && ((ClassInfo)obj).name == name; - } - - public int getTag() { return tag; } - - public String getClassName(ConstPool cp) { - return cp.getUtf8Info(name); - } - - public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { - String nameStr = cp.getUtf8Info(name); - String newNameStr = null; - if (nameStr.equals(oldName)) - newNameStr = newName; - else if (nameStr.charAt(0) == '[') { - String s = Descriptor.rename(nameStr, oldName, newName); - if (nameStr != s) - newNameStr = s; - } - - if (newNameStr != null) - if (cache == null) - name = cp.addUtf8Info(newNameStr); - else { - cache.remove(this); - name = cp.addUtf8Info(newNameStr); - cache.put(this, this); - } - } - - public void renameClass(ConstPool cp, Map map, HashMap cache) { - String oldName = cp.getUtf8Info(name); - String newName = null; - if (oldName.charAt(0) == '[') { - String s = Descriptor.rename(oldName, map); - if (oldName != s) - newName = s; - } - else { - String s = (String)map.get(oldName); - if (s != null && !s.equals(oldName)) - newName = s; - } - - if (newName != null) { - if (cache == null) - name = cp.addUtf8Info(newName); - else { - cache.remove(this); - name = cp.addUtf8Info(newName); - cache.put(this, this); - } - } - } - - public int copy(ConstPool src, ConstPool dest, Map map) { - String classname = src.getUtf8Info(name); - if (map != null) { - String newname = (String)map.get(classname); - if (newname != null) - classname = newname; - } - - return dest.addClassInfo(classname); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeShort(name); - } - - public void print(PrintWriter out) { - out.print("Class #"); - out.println(name); - } -} - -class NameAndTypeInfo extends ConstInfo { - static final int tag = 12; - int memberName; - int typeDescriptor; - - public NameAndTypeInfo(int name, int type, int index) { - super(index); - memberName = name; - typeDescriptor = type; - } - - public NameAndTypeInfo(DataInputStream in, int index) throws IOException { - super(index); - memberName = in.readUnsignedShort(); - typeDescriptor = in.readUnsignedShort(); - } - - public int hashCode() { return (memberName << 16) ^ typeDescriptor; } - - public boolean equals(Object obj) { - if (obj instanceof NameAndTypeInfo) { - NameAndTypeInfo nti = (NameAndTypeInfo)obj; - return nti.memberName == memberName && nti.typeDescriptor == typeDescriptor; - } - else - return false; - } - - public int getTag() { return tag; } - - public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { - String type = cp.getUtf8Info(typeDescriptor); - String type2 = Descriptor.rename(type, oldName, newName); - if (type != type2) - if (cache == null) - typeDescriptor = cp.addUtf8Info(type2); - else { - cache.remove(this); - typeDescriptor = cp.addUtf8Info(type2); - cache.put(this, this); - } - } - - public void renameClass(ConstPool cp, Map map, HashMap cache) { - String type = cp.getUtf8Info(typeDescriptor); - String type2 = Descriptor.rename(type, map); - if (type != type2) - if (cache == null) - typeDescriptor = cp.addUtf8Info(type2); - else { - cache.remove(this); - typeDescriptor = cp.addUtf8Info(type2); - cache.put(this, this); - } - } - - public int copy(ConstPool src, ConstPool dest, Map map) { - String mname = src.getUtf8Info(memberName); - String tdesc = src.getUtf8Info(typeDescriptor); - tdesc = Descriptor.rename(tdesc, map); - return dest.addNameAndTypeInfo(dest.addUtf8Info(mname), - dest.addUtf8Info(tdesc)); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeShort(memberName); - out.writeShort(typeDescriptor); - } - - public void print(PrintWriter out) { - out.print("NameAndType #"); - out.print(memberName); - out.print(", type #"); - out.println(typeDescriptor); - } -} - -abstract class MemberrefInfo extends ConstInfo { - int classIndex; - int nameAndTypeIndex; - - public MemberrefInfo(int cindex, int ntindex, int thisIndex) { - super(thisIndex); - classIndex = cindex; - nameAndTypeIndex = ntindex; - } - - public MemberrefInfo(DataInputStream in, int thisIndex) throws IOException { - super(thisIndex); - classIndex = in.readUnsignedShort(); - nameAndTypeIndex = in.readUnsignedShort(); - } - - public int hashCode() { return (classIndex << 16) ^ nameAndTypeIndex; } - - public boolean equals(Object obj) { - if (obj instanceof MemberrefInfo) { - MemberrefInfo mri = (MemberrefInfo)obj; - return mri.classIndex == classIndex && mri.nameAndTypeIndex == nameAndTypeIndex - && mri.getClass() == this.getClass(); - } - else - return false; - } - - public int copy(ConstPool src, ConstPool dest, Map map) { - int classIndex2 = src.getItem(classIndex).copy(src, dest, map); - int ntIndex2 = src.getItem(nameAndTypeIndex).copy(src, dest, map); - return copy2(dest, classIndex2, ntIndex2); - } - - abstract protected int copy2(ConstPool dest, int cindex, int ntindex); - - public void write(DataOutputStream out) throws IOException { - out.writeByte(getTag()); - out.writeShort(classIndex); - out.writeShort(nameAndTypeIndex); - } - - public void print(PrintWriter out) { - out.print(getTagName() + " #"); - out.print(classIndex); - out.print(", name&type #"); - out.println(nameAndTypeIndex); - } - - public abstract String getTagName(); -} - -class FieldrefInfo extends MemberrefInfo { - static final int tag = 9; - - public FieldrefInfo(int cindex, int ntindex, int thisIndex) { - super(cindex, ntindex, thisIndex); - } - - public FieldrefInfo(DataInputStream in, int thisIndex) throws IOException { - super(in, thisIndex); - } - - public int getTag() { return tag; } - - public String getTagName() { return "Field"; } - - protected int copy2(ConstPool dest, int cindex, int ntindex) { - return dest.addFieldrefInfo(cindex, ntindex); - } -} - -class MethodrefInfo extends MemberrefInfo { - static final int tag = 10; - - public MethodrefInfo(int cindex, int ntindex, int thisIndex) { - super(cindex, ntindex, thisIndex); - } - - public MethodrefInfo(DataInputStream in, int thisIndex) throws IOException { - super(in, thisIndex); - } - - public int getTag() { return tag; } - - public String getTagName() { return "Method"; } - - protected int copy2(ConstPool dest, int cindex, int ntindex) { - return dest.addMethodrefInfo(cindex, ntindex); - } -} - -class InterfaceMethodrefInfo extends MemberrefInfo { - static final int tag = 11; - - public InterfaceMethodrefInfo(int cindex, int ntindex, int thisIndex) { - super(cindex, ntindex, thisIndex); - } - - public InterfaceMethodrefInfo(DataInputStream in, int thisIndex) throws IOException { - super(in, thisIndex); - } - - public int getTag() { return tag; } - - public String getTagName() { return "Interface"; } - - protected int copy2(ConstPool dest, int cindex, int ntindex) { - return dest.addInterfaceMethodrefInfo(cindex, ntindex); - } -} - -class StringInfo extends ConstInfo { - static final int tag = 8; - int string; - - public StringInfo(int str, int index) { - super(index); - string = str; - } - - public StringInfo(DataInputStream in, int index) throws IOException { - super(index); - string = in.readUnsignedShort(); - } - - public int hashCode() { return string; } - - public boolean equals(Object obj) { - return obj instanceof StringInfo && ((StringInfo)obj).string == string; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addStringInfo(src.getUtf8Info(string)); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeShort(string); - } - - public void print(PrintWriter out) { - out.print("String #"); - out.println(string); - } -} - -class IntegerInfo extends ConstInfo { - static final int tag = 3; - int value; - - public IntegerInfo(int v, int index) { - super(index); - value = v; - } - - public IntegerInfo(DataInputStream in, int index) throws IOException { - super(index); - value = in.readInt(); - } - - public int hashCode() { return value; } - - public boolean equals(Object obj) { - return obj instanceof IntegerInfo && ((IntegerInfo)obj).value == value; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addIntegerInfo(value); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeInt(value); - } - - public void print(PrintWriter out) { - out.print("Integer "); - out.println(value); - } -} - -class FloatInfo extends ConstInfo { - static final int tag = 4; - float value; - - public FloatInfo(float f, int index) { - super(index); - value = f; - } - - public FloatInfo(DataInputStream in, int index) throws IOException { - super(index); - value = in.readFloat(); - } - - public int hashCode() { return Float.floatToIntBits(value); } - - public boolean equals(Object obj) { - return obj instanceof FloatInfo && ((FloatInfo)obj).value == value; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addFloatInfo(value); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeFloat(value); - } - - public void print(PrintWriter out) { - out.print("Float "); - out.println(value); - } -} - -class LongInfo extends ConstInfo { - static final int tag = 5; - long value; - - public LongInfo(long l, int index) { - super(index); - value = l; - } - - public LongInfo(DataInputStream in, int index) throws IOException { - super(index); - value = in.readLong(); - } - - public int hashCode() { return (int)(value ^ (value >>> 32)); } - - public boolean equals(Object obj) { - return obj instanceof LongInfo && ((LongInfo)obj).value == value; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addLongInfo(value); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeLong(value); - } - - public void print(PrintWriter out) { - out.print("Long "); - out.println(value); - } -} - -class DoubleInfo extends ConstInfo { - static final int tag = 6; - double value; - - public DoubleInfo(double d, int index) { - super(index); - value = d; - } - - public DoubleInfo(DataInputStream in, int index) throws IOException { - super(index); - value = in.readDouble(); - } - - public int hashCode() { - long v = Double.doubleToLongBits(value); - return (int)(v ^ (v >>> 32)); - } - - public boolean equals(Object obj) { - return obj instanceof DoubleInfo && ((DoubleInfo)obj).value == value; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addDoubleInfo(value); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeDouble(value); - } - - public void print(PrintWriter out) { - out.print("Double "); - out.println(value); - } -} - -class Utf8Info extends ConstInfo { - static final int tag = 1; - String string; - - public Utf8Info(String utf8, int index) { - super(index); - string = utf8; - } - - public Utf8Info(DataInputStream in, int index) throws IOException { - super(index); - string = in.readUTF(); - } - - public int hashCode() { - return string.hashCode(); - } - - public boolean equals(Object obj) { - return obj instanceof Utf8Info && ((Utf8Info)obj).string.equals(string); - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addUtf8Info(string); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeUTF(string); - } - - public void print(PrintWriter out) { - out.print("UTF8 \""); - out.print(string); - out.println("\""); - } -} - -class MethodHandleInfo extends ConstInfo { - static final int tag = 15; - int refKind, refIndex; - - public MethodHandleInfo(int kind, int referenceIndex, int index) { - super(index); - refKind = kind; - refIndex = referenceIndex; - } - - public MethodHandleInfo(DataInputStream in, int index) throws IOException { - super(index); - refKind = in.readUnsignedByte(); - refIndex = in.readUnsignedShort(); - } - - public int hashCode() { return (refKind << 16) ^ refIndex; } - - public boolean equals(Object obj) { - if (obj instanceof MethodHandleInfo) { - MethodHandleInfo mh = (MethodHandleInfo)obj; - return mh.refKind == refKind && mh.refIndex == refIndex; - } - else - return false; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addMethodHandleInfo(refKind, - src.getItem(refIndex).copy(src, dest, map)); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeByte(refKind); - out.writeShort(refIndex); - } - - public void print(PrintWriter out) { - out.print("MethodHandle #"); - out.print(refKind); - out.print(", index #"); - out.println(refIndex); - } -} - -class MethodTypeInfo extends ConstInfo { - static final int tag = 16; - int descriptor; - - public MethodTypeInfo(int desc, int index) { - super(index); - descriptor = desc; - } - - public MethodTypeInfo(DataInputStream in, int index) throws IOException { - super(index); - descriptor = in.readUnsignedShort(); - } - - public int hashCode() { return descriptor; } - - public boolean equals(Object obj) { - if (obj instanceof MethodTypeInfo) - return ((MethodTypeInfo)obj).descriptor == descriptor; - else - return false; - } - - public int getTag() { return tag; } - - public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { - String desc = cp.getUtf8Info(descriptor); - String desc2 = Descriptor.rename(desc, oldName, newName); - if (desc != desc2) - if (cache == null) - descriptor = cp.addUtf8Info(desc2); - else { - cache.remove(this); - descriptor = cp.addUtf8Info(desc2); - cache.put(this, this); - } - } - - public void renameClass(ConstPool cp, Map map, HashMap cache) { - String desc = cp.getUtf8Info(descriptor); - String desc2 = Descriptor.rename(desc, map); - if (desc != desc2) - if (cache == null) - descriptor = cp.addUtf8Info(desc2); - else { - cache.remove(this); - descriptor = cp.addUtf8Info(desc2); - cache.put(this, this); - } - } - - public int copy(ConstPool src, ConstPool dest, Map map) { - String desc = src.getUtf8Info(descriptor); - desc = Descriptor.rename(desc, map); - return dest.addMethodTypeInfo(dest.addUtf8Info(desc)); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeShort(descriptor); - } - - public void print(PrintWriter out) { - out.print("MethodType #"); - out.println(descriptor); - } -} - -class InvokeDynamicInfo extends ConstInfo { - static final int tag = 18; - int bootstrap, nameAndType; - - public InvokeDynamicInfo(int bootstrapMethod, int ntIndex, int index) { - super(index); - bootstrap = bootstrapMethod; - nameAndType = ntIndex; - } - - public InvokeDynamicInfo(DataInputStream in, int index) throws IOException { - super(index); - bootstrap = in.readUnsignedShort(); - nameAndType = in.readUnsignedShort(); - } - - public int hashCode() { return (bootstrap << 16) ^ nameAndType; } - - public boolean equals(Object obj) { - if (obj instanceof InvokeDynamicInfo) { - InvokeDynamicInfo iv = (InvokeDynamicInfo)obj; - return iv.bootstrap == bootstrap && iv.nameAndType == nameAndType; - } - else - return false; - } - - public int getTag() { return tag; } - - public int copy(ConstPool src, ConstPool dest, Map map) { - return dest.addInvokeDynamicInfo(bootstrap, - src.getItem(nameAndType).copy(src, dest, map)); - } - - public void write(DataOutputStream out) throws IOException { - out.writeByte(tag); - out.writeShort(bootstrap); - out.writeShort(nameAndType); - } - - public void print(PrintWriter out) { - out.print("InvokeDynamic #"); - out.print(bootstrap); - out.print(", name&type #"); - out.println(nameAndType); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java deleted file mode 100644 index 900ce1a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java +++ /dev/null @@ -1,73 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.util.Map; -import java.io.IOException; - -/** - * ConstantValue_attribute. - */ -public class ConstantAttribute extends AttributeInfo { - /** - * The name of this attribute "ConstantValue". - */ - public static final String tag = "ConstantValue"; - - ConstantAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a ConstantValue attribute. - * - * @param cp a constant pool table. - * @param index constantvalue_index - * of ConstantValue_attribute. - */ - public ConstantAttribute(ConstPool cp, int index) { - super(cp, tag); - byte[] bvalue = new byte[2]; - bvalue[0] = (byte)(index >>> 8); - bvalue[1] = (byte)index; - set(bvalue); - } - - /** - * Returns constantvalue_index. - */ - public int getConstantValue() { - return ByteArray.readU16bit(get(), 0); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - int index = getConstPool().copy(getConstantValue(), newCp, - classnames); - return new ConstantAttribute(newCp, index); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java deleted file mode 100644 index fdf1a7f..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * Deprecated_attribute. - */ -public class DeprecatedAttribute extends AttributeInfo { - /** - * The name of this attribute "Deprecated". - */ - public static final String tag = "Deprecated"; - - DeprecatedAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a Deprecated attribute. - * - * @param cp a constant pool table. - */ - public DeprecatedAttribute(ConstPool cp) { - super(cp, tag, new byte[0]); - } - - /** - * Makes a copy. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames should be null. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - return new DeprecatedAttribute(newCp); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/Descriptor.java b/src/com/wenshuo/agent/javassist/bytecode/Descriptor.java deleted file mode 100644 index 7b8f2f1..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/Descriptor.java +++ /dev/null @@ -1,872 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtPrimitiveType; -import com.wenshuo.agent.javassist.NotFoundException; -import java.util.Map; - -/** - * A support class for dealing with descriptors. - * - *

See chapter 4.3 in "The Java Virtual Machine Specification (2nd ed.)" - */ -public class Descriptor { - /** - * Converts a class name into the internal representation used in - * the JVM. - * - *

Note that toJvmName(toJvmName(s)) is equivalent - * to toJvmName(s). - */ - public static String toJvmName(String classname) { - return classname.replace('.', '/'); - } - - /** - * Converts a class name from the internal representation used in - * the JVM to the normal one used in Java. - * This method does not deal with an array type name such as - * "[Ljava/lang/Object;" and "[I;". For such names, use - * toClassName(). - * - * @see #toClassName(String) - */ - public static String toJavaName(String classname) { - return classname.replace('/', '.'); - } - - /** - * Returns the internal representation of the class name in the - * JVM. - */ - public static String toJvmName(CtClass clazz) { - if (clazz.isArray()) - return of(clazz); - else - return toJvmName(clazz.getName()); - } - - /** - * Converts to a Java class name from a descriptor. - * - * @param descriptor type descriptor. - */ - public static String toClassName(String descriptor) { - int arrayDim = 0; - int i = 0; - char c = descriptor.charAt(0); - while (c == '[') { - ++arrayDim; - c = descriptor.charAt(++i); - } - - String name; - if (c == 'L') { - int i2 = descriptor.indexOf(';', i++); - name = descriptor.substring(i, i2).replace('/', '.'); - i = i2; - } - else if (c == 'V') - name = "void"; - else if (c == 'I') - name = "int"; - else if (c == 'B') - name = "byte"; - else if (c == 'J') - name = "long"; - else if (c == 'D') - name = "double"; - else if (c == 'F') - name = "float"; - else if (c == 'C') - name = "char"; - else if (c == 'S') - name = "short"; - else if (c == 'Z') - name = "boolean"; - else - throw new RuntimeException("bad descriptor: " + descriptor); - - if (i + 1 != descriptor.length()) - throw new RuntimeException("multiple descriptors?: " + descriptor); - - if (arrayDim == 0) - return name; - else { - StringBuffer sbuf = new StringBuffer(name); - do { - sbuf.append("[]"); - } while (--arrayDim > 0); - - return sbuf.toString(); - } - } - - /** - * Converts to a descriptor from a Java class name - */ - public static String of(String classname) { - if (classname.equals("void")) - return "V"; - else if (classname.equals("int")) - return "I"; - else if (classname.equals("byte")) - return "B"; - else if (classname.equals("long")) - return "J"; - else if (classname.equals("double")) - return "D"; - else if (classname.equals("float")) - return "F"; - else if (classname.equals("char")) - return "C"; - else if (classname.equals("short")) - return "S"; - else if (classname.equals("boolean")) - return "Z"; - else - return "L" + toJvmName(classname) + ";"; - } - - /** - * Substitutes a class name - * in the given descriptor string. - * - * @param desc descriptor string - * @param oldname replaced JVM class name - * @param newname substituted JVM class name - * - * @see Descriptor#toJvmName(String) - */ - public static String rename(String desc, String oldname, String newname) { - if (desc.indexOf(oldname) < 0) - return desc; - - StringBuffer newdesc = new StringBuffer(); - int head = 0; - int i = 0; - for (;;) { - int j = desc.indexOf('L', i); - if (j < 0) - break; - else if (desc.startsWith(oldname, j + 1) - && desc.charAt(j + oldname.length() + 1) == ';') { - newdesc.append(desc.substring(head, j)); - newdesc.append('L'); - newdesc.append(newname); - newdesc.append(';'); - head = i = j + oldname.length() + 2; - } - else { - i = desc.indexOf(';', j) + 1; - if (i < 1) - break; // ';' was not found. - } - } - - if (head == 0) - return desc; - else { - int len = desc.length(); - if (head < len) - newdesc.append(desc.substring(head, len)); - - return newdesc.toString(); - } - } - - /** - * Substitutes class names in the given descriptor string - * according to the given map. - * - * @param map a map between replaced and substituted - * JVM class names. - * @see Descriptor#toJvmName(String) - */ - public static String rename(String desc, Map map) { - if (map == null) - return desc; - - StringBuffer newdesc = new StringBuffer(); - int head = 0; - int i = 0; - for (;;) { - int j = desc.indexOf('L', i); - if (j < 0) - break; - - int k = desc.indexOf(';', j); - if (k < 0) - break; - - i = k + 1; - String name = desc.substring(j + 1, k); - String name2 = (String)map.get(name); - if (name2 != null) { - newdesc.append(desc.substring(head, j)); - newdesc.append('L'); - newdesc.append(name2); - newdesc.append(';'); - head = i; - } - } - - if (head == 0) - return desc; - else { - int len = desc.length(); - if (head < len) - newdesc.append(desc.substring(head, len)); - - return newdesc.toString(); - } - } - - /** - * Returns the descriptor representing the given type. - */ - public static String of(CtClass type) { - StringBuffer sbuf = new StringBuffer(); - toDescriptor(sbuf, type); - return sbuf.toString(); - } - - private static void toDescriptor(StringBuffer desc, CtClass type) { - if (type.isArray()) { - desc.append('['); - try { - toDescriptor(desc, type.getComponentType()); - } - catch (NotFoundException e) { - desc.append('L'); - String name = type.getName(); - desc.append(toJvmName(name.substring(0, name.length() - 2))); - desc.append(';'); - } - } - else if (type.isPrimitive()) { - CtPrimitiveType pt = (CtPrimitiveType)type; - desc.append(pt.getDescriptor()); - } - else { // class type - desc.append('L'); - desc.append(type.getName().replace('.', '/')); - desc.append(';'); - } - } - - /** - * Returns the descriptor representing a constructor receiving - * the given parameter types. - * - * @param paramTypes parameter types - */ - public static String ofConstructor(CtClass[] paramTypes) { - return ofMethod(CtClass.voidType, paramTypes); - } - - /** - * Returns the descriptor representing a method that receives - * the given parameter types and returns the given type. - * - * @param returnType return type - * @param paramTypes parameter types - */ - public static String ofMethod(CtClass returnType, CtClass[] paramTypes) { - StringBuffer desc = new StringBuffer(); - desc.append('('); - if (paramTypes != null) { - int n = paramTypes.length; - for (int i = 0; i < n; ++i) - toDescriptor(desc, paramTypes[i]); - } - - desc.append(')'); - if (returnType != null) - toDescriptor(desc, returnType); - - return desc.toString(); - } - - /** - * Returns the descriptor representing a list of parameter types. - * For example, if the given parameter types are two int, - * then this method returns "(II)". - * - * @param paramTypes parameter types - */ - public static String ofParameters(CtClass[] paramTypes) { - return ofMethod(null, paramTypes); - } - - /** - * Appends a parameter type to the parameter list represented - * by the given descriptor. - * - *

classname must not be an array type. - * - * @param classname parameter type (not primitive type) - * @param desc descriptor - */ - public static String appendParameter(String classname, String desc) { - int i = desc.indexOf(')'); - if (i < 0) - return desc; - else { - StringBuffer newdesc = new StringBuffer(); - newdesc.append(desc.substring(0, i)); - newdesc.append('L'); - newdesc.append(classname.replace('.', '/')); - newdesc.append(';'); - newdesc.append(desc.substring(i)); - return newdesc.toString(); - } - } - - /** - * Inserts a parameter type at the beginning of the parameter - * list represented - * by the given descriptor. - * - *

classname must not be an array type. - * - * @param classname parameter type (not primitive type) - * @param desc descriptor - */ - public static String insertParameter(String classname, String desc) { - if (desc.charAt(0) != '(') - return desc; - else - return "(L" + classname.replace('.', '/') + ';' - + desc.substring(1); - } - - /** - * Appends a parameter type to the parameter list represented - * by the given descriptor. The appended parameter becomes - * the last parameter. - * - * @param type the type of the appended parameter. - * @param descriptor the original descriptor. - */ - public static String appendParameter(CtClass type, String descriptor) { - int i = descriptor.indexOf(')'); - if (i < 0) - return descriptor; - else { - StringBuffer newdesc = new StringBuffer(); - newdesc.append(descriptor.substring(0, i)); - toDescriptor(newdesc, type); - newdesc.append(descriptor.substring(i)); - return newdesc.toString(); - } - } - - /** - * Inserts a parameter type at the beginning of the parameter - * list represented - * by the given descriptor. - * - * @param type the type of the inserted parameter. - * @param descriptor the descriptor of the method. - */ - public static String insertParameter(CtClass type, - String descriptor) { - if (descriptor.charAt(0) != '(') - return descriptor; - else - return "(" + of(type) + descriptor.substring(1); - } - - /** - * Changes the return type included in the given descriptor. - * - *

classname must not be an array type. - * - * @param classname return type - * @param desc descriptor - */ - public static String changeReturnType(String classname, String desc) { - int i = desc.indexOf(')'); - if (i < 0) - return desc; - else { - StringBuffer newdesc = new StringBuffer(); - newdesc.append(desc.substring(0, i + 1)); - newdesc.append('L'); - newdesc.append(classname.replace('.', '/')); - newdesc.append(';'); - return newdesc.toString(); - } - } - - /** - * Returns the CtClass objects representing the parameter - * types specified by the given descriptor. - * - * @param desc descriptor - * @param cp the class pool used for obtaining - * a CtClass object. - */ - public static CtClass[] getParameterTypes(String desc, ClassPool cp) - throws NotFoundException - { - if (desc.charAt(0) != '(') - return null; - else { - int num = numOfParameters(desc); - CtClass[] args = new CtClass[num]; - int n = 0; - int i = 1; - do { - i = toCtClass(cp, desc, i, args, n++); - } while (i > 0); - return args; - } - } - - /** - * Returns true if the list of the parameter types of desc1 is equal to - * that of desc2. - * For example, "(II)V" and "(II)I" are equal. - */ - public static boolean eqParamTypes(String desc1, String desc2) { - if (desc1.charAt(0) != '(') - return false; - - for (int i = 0; true; ++i) { - char c = desc1.charAt(i); - if (c != desc2.charAt(i)) - return false; - - if (c == ')') - return true; - } - } - - /** - * Returns the signature of the given descriptor. The signature does - * not include the return type. For example, the signature of "(I)V" - * is "(I)". - */ - public static String getParamDescriptor(String decl) { - return decl.substring(0, decl.indexOf(')') + 1); - } - - /** - * Returns the CtClass object representing the return - * type specified by the given descriptor. - * - * @param desc descriptor - * @param cp the class pool used for obtaining - * a CtClass object. - */ - public static CtClass getReturnType(String desc, ClassPool cp) - throws NotFoundException - { - int i = desc.indexOf(')'); - if (i < 0) - return null; - else { - CtClass[] type = new CtClass[1]; - toCtClass(cp, desc, i + 1, type, 0); - return type[0]; - } - } - - /** - * Returns the number of the prameters included in the given - * descriptor. - * - * @param desc descriptor - */ - public static int numOfParameters(String desc) { - int n = 0; - int i = 1; - for (;;) { - char c = desc.charAt(i); - if (c == ')') - break; - - while (c == '[') - c = desc.charAt(++i); - - if (c == 'L') { - i = desc.indexOf(';', i) + 1; - if (i <= 0) - throw new IndexOutOfBoundsException("bad descriptor"); - } - else - ++i; - - ++n; - } - - return n; - } - - /** - * Returns a CtClass object representing the type - * specified by the given descriptor. - * - *

This method works even if the package-class separator is - * not / but . (period). For example, - * it accepts Ljava.lang.Object; - * as well as Ljava/lang/Object;. - * - * @param desc descriptor. - * @param cp the class pool used for obtaining - * a CtClass object. - */ - public static CtClass toCtClass(String desc, ClassPool cp) - throws NotFoundException - { - CtClass[] clazz = new CtClass[1]; - int res = toCtClass(cp, desc, 0, clazz, 0); - if (res >= 0) - return clazz[0]; - else { - // maybe, you forgot to surround the class name with - // L and ;. It violates the protocol, but I'm tolerant... - return cp.get(desc.replace('/', '.')); - } - } - - private static int toCtClass(ClassPool cp, String desc, int i, - CtClass[] args, int n) - throws NotFoundException - { - int i2; - String name; - - int arrayDim = 0; - char c = desc.charAt(i); - while (c == '[') { - ++arrayDim; - c = desc.charAt(++i); - } - - if (c == 'L') { - i2 = desc.indexOf(';', ++i); - name = desc.substring(i, i2++).replace('/', '.'); - } - else { - CtClass type = toPrimitiveClass(c); - if (type == null) - return -1; // error - - i2 = i + 1; - if (arrayDim == 0) { - args[n] = type; - return i2; // neither an array type or a class type - } - else - name = type.getName(); - } - - if (arrayDim > 0) { - StringBuffer sbuf = new StringBuffer(name); - while (arrayDim-- > 0) - sbuf.append("[]"); - - name = sbuf.toString(); - } - - args[n] = cp.get(name); - return i2; - } - - static CtClass toPrimitiveClass(char c) { - CtClass type = null; - switch (c) { - case 'Z' : - type = CtClass.booleanType; - break; - case 'C' : - type = CtClass.charType; - break; - case 'B' : - type = CtClass.byteType; - break; - case 'S' : - type = CtClass.shortType; - break; - case 'I' : - type = CtClass.intType; - break; - case 'J' : - type = CtClass.longType; - break; - case 'F' : - type = CtClass.floatType; - break; - case 'D' : - type = CtClass.doubleType; - break; - case 'V' : - type = CtClass.voidType; - break; - } - - return type; - } - - /** - * Computes the dimension of the array represented by the given - * descriptor. For example, if the descriptor is "[[I", - * then this method returns 2. - * - * @param desc the descriptor. - * @return 0 if the descriptor does not represent an array type. - */ - public static int arrayDimension(String desc) { - int dim = 0; - while (desc.charAt(dim) == '[') - ++dim; - - return dim; - } - - /** - * Returns the descriptor of the type of the array component. - * For example, if the given descriptor is - * "[[Ljava/lang/String;" and the given dimension is 2, - * then this method returns "Ljava/lang/String;". - * - * @param desc the descriptor. - * @param dim the array dimension. - */ - public static String toArrayComponent(String desc, int dim) { - return desc.substring(dim); - } - - /** - * Computes the data size specified by the given descriptor. - * For example, if the descriptor is "D", this method returns 2. - * - *

If the descriptor represents a method type, this method returns - * (the size of the returned value) - (the sum of the data sizes - * of all the parameters). For example, if the descriptor is - * "(I)D", then this method returns 1 (= 2 - 1). - * - * @param desc descriptor - */ - public static int dataSize(String desc) { - return dataSize(desc, true); - } - - /** - * Computes the data size of parameters. - * If one of the parameters is double type, the size of that parameter - * is 2 words. For example, if the given descriptor is - * "(IJ)D", then this method returns 3. The size of the - * return type is not computed. - * - * @param desc a method descriptor. - */ - public static int paramSize(String desc) { - return -dataSize(desc, false); - } - - private static int dataSize(String desc, boolean withRet) { - int n = 0; - char c = desc.charAt(0); - if (c == '(') { - int i = 1; - for (;;) { - c = desc.charAt(i); - if (c == ')') { - c = desc.charAt(i + 1); - break; - } - - boolean array = false; - while (c == '[') { - array = true; - c = desc.charAt(++i); - } - - if (c == 'L') { - i = desc.indexOf(';', i) + 1; - if (i <= 0) - throw new IndexOutOfBoundsException("bad descriptor"); - } - else - ++i; - - if (!array && (c == 'J' || c == 'D')) - n -= 2; - else - --n; - } - } - - if (withRet) - if (c == 'J' || c == 'D') - n += 2; - else if (c != 'V') - ++n; - - return n; - } - - /** - * Returns a human-readable representation of the - * given descriptor. For example, Ljava/lang/Object; - * is converted into java.lang.Object. - * (I[I)V is converted into (int, int[]) - * (the return type is ignored). - */ - public static String toString(String desc) { - return PrettyPrinter.toString(desc); - } - - static class PrettyPrinter { - static String toString(String desc) { - StringBuffer sbuf = new StringBuffer(); - if (desc.charAt(0) == '(') { - int pos = 1; - sbuf.append('('); - while (desc.charAt(pos) != ')') { - if (pos > 1) - sbuf.append(','); - - pos = readType(sbuf, pos, desc); - } - - sbuf.append(')'); - } - else - readType(sbuf, 0, desc); - - return sbuf.toString(); - } - - static int readType(StringBuffer sbuf, int pos, String desc) { - char c = desc.charAt(pos); - int arrayDim = 0; - while (c == '[') { - arrayDim++; - c = desc.charAt(++pos); - } - - if (c == 'L') - while (true) { - c = desc.charAt(++pos); - if (c == ';') - break; - - if (c == '/') - c = '.'; - - sbuf.append(c); - } - else { - CtClass t = toPrimitiveClass(c); - sbuf.append(t.getName()); - } - - while (arrayDim-- > 0) - sbuf.append("[]"); - - return pos + 1; - } - } - - /** - * An Iterator over a descriptor. - */ - public static class Iterator { - private String desc; - private int index, curPos; - private boolean param; - - /** - * Constructs an iterator. - * - * @param s descriptor. - */ - public Iterator(String s) { - desc = s; - index = curPos = 0; - param = false; - } - - /** - * Returns true if the iteration has more elements. - */ - public boolean hasNext() { - return index < desc.length(); - } - - /** - * Returns true if the current element is a parameter type. - */ - public boolean isParameter() { return param; } - - /** - * Returns the first character of the current element. - */ - public char currentChar() { return desc.charAt(curPos); } - - /** - * Returns true if the current element is double or long type. - */ - public boolean is2byte() { - char c = currentChar(); - return c == 'D' || c == 'J'; - } - - /** - * Returns the position of the next type character. - * That type character becomes a new current element. - */ - public int next() { - int nextPos = index; - char c = desc.charAt(nextPos); - if (c == '(') { - ++index; - c = desc.charAt(++nextPos); - param = true; - } - - if (c == ')') { - ++index; - c = desc.charAt(++nextPos); - param = false; - } - - while (c == '[') - c = desc.charAt(++nextPos); - - if (c == 'L') { - nextPos = desc.indexOf(';', nextPos) + 1; - if (nextPos <= 0) - throw new IndexOutOfBoundsException("bad descriptor"); - } - else - ++nextPos; - - curPos = index; - index = nextPos; - return curPos; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java b/src/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java deleted file mode 100644 index 1035450..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import com.wenshuo.agent.javassist.CannotCompileException; - -/** - * An exception thrown when adding a duplicate member is requested. - * - * @see ClassFile#addMethod(MethodInfo) - * @see ClassFile#addField(FieldInfo) - */ -public class DuplicateMemberException extends CannotCompileException { - public DuplicateMemberException(String msg) { - super(msg); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java deleted file mode 100644 index 05a0f4a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java +++ /dev/null @@ -1,142 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -import com.wenshuo.agent.javassist.CtConstructor; - -/** - * EnclosingMethod_attribute. - */ -public class EnclosingMethodAttribute extends AttributeInfo { - /** - * The name of this attribute "EnclosingMethod". - */ - public static final String tag = "EnclosingMethod"; - - EnclosingMethodAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs an EnclosingMethod attribute. - * - * @param cp a constant pool table. - * @param className the name of the innermost enclosing class. - * @param methodName the name of the enclosing method. - * @param methodDesc the descriptor of the enclosing method. - */ - public EnclosingMethodAttribute(ConstPool cp, String className, - String methodName, String methodDesc) { - super(cp, tag); - int ci = cp.addClassInfo(className); - int ni = cp.addNameAndTypeInfo(methodName, methodDesc); - byte[] bvalue = new byte[4]; - bvalue[0] = (byte)(ci >>> 8); - bvalue[1] = (byte)ci; - bvalue[2] = (byte)(ni >>> 8); - bvalue[3] = (byte)ni; - set(bvalue); - } - - /** - * Constructs an EnclosingMethod attribute. - * The value of method_index is set to 0. - * - * @param cp a constant pool table. - * @param className the name of the innermost enclosing class. - */ - public EnclosingMethodAttribute(ConstPool cp, String className) { - super(cp, tag); - int ci = cp.addClassInfo(className); - int ni = 0; - byte[] bvalue = new byte[4]; - bvalue[0] = (byte)(ci >>> 8); - bvalue[1] = (byte)ci; - bvalue[2] = (byte)(ni >>> 8); - bvalue[3] = (byte)ni; - set(bvalue); - } - - /** - * Returns the value of class_index. - */ - public int classIndex() { - return ByteArray.readU16bit(get(), 0); - } - - /** - * Returns the value of method_index. - */ - public int methodIndex() { - return ByteArray.readU16bit(get(), 2); - } - - /** - * Returns the name of the class specified by class_index. - */ - public String className() { - return getConstPool().getClassInfo(classIndex()); - } - - /** - * Returns the method name specified by method_index. - * If the method is a class initializer (static constructor), - * {@link MethodInfo#nameClinit} is returned. - */ - public String methodName() { - ConstPool cp = getConstPool(); - int mi = methodIndex(); - if (mi == 0) - return MethodInfo.nameClinit; - else { - int ni = cp.getNameAndTypeName(mi); - return cp.getUtf8Info(ni); - } - } - - /** - * Returns the method descriptor specified by method_index. - */ - public String methodDescriptor() { - ConstPool cp = getConstPool(); - int mi = methodIndex(); - int ti = cp.getNameAndTypeDescriptor(mi); - return cp.getUtf8Info(ti); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - if (methodIndex() == 0) - return new EnclosingMethodAttribute(newCp, className()); - else - return new EnclosingMethodAttribute(newCp, className(), - methodName(), methodDescriptor()); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java b/src/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java deleted file mode 100644 index 9ff2fa5..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.ArrayList; -import java.util.Map; - -class ExceptionTableEntry { - int startPc; - int endPc; - int handlerPc; - int catchType; - - ExceptionTableEntry(int start, int end, int handle, int type) { - startPc = start; - endPc = end; - handlerPc = handle; - catchType = type; - } -} - -/** - * exception_table[] of Code_attribute. - */ -public class ExceptionTable implements Cloneable { - private ConstPool constPool; - private ArrayList entries; - - /** - * Constructs an exception_table[]. - * - * @param cp constant pool table. - */ - public ExceptionTable(ConstPool cp) { - constPool = cp; - entries = new ArrayList(); - } - - ExceptionTable(ConstPool cp, DataInputStream in) throws IOException { - constPool = cp; - int length = in.readUnsignedShort(); - ArrayList list = new ArrayList(length); - for (int i = 0; i < length; ++i) { - int start = in.readUnsignedShort(); - int end = in.readUnsignedShort(); - int handle = in.readUnsignedShort(); - int type = in.readUnsignedShort(); - list.add(new ExceptionTableEntry(start, end, handle, type)); - } - - entries = list; - } - - /** - * Creates and returns a copy of this object. - * The constant pool object is shared between this object - * and the cloned object. - */ - public Object clone() throws CloneNotSupportedException { - ExceptionTable r = (ExceptionTable)super.clone(); - r.entries = new ArrayList(entries); - return r; - } - - /** - * Returns exception_table_length, which is the number - * of entries in the exception_table[]. - */ - public int size() { - return entries.size(); - } - - /** - * Returns startPc of the n-th entry. - * - * @param nth the n-th (>= 0). - */ - public int startPc(int nth) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - return e.startPc; - } - - /** - * Sets startPc of the n-th entry. - * - * @param nth the n-th (>= 0). - * @param value new value. - */ - public void setStartPc(int nth, int value) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - e.startPc = value; - } - - /** - * Returns endPc of the n-th entry. - * - * @param nth the n-th (>= 0). - */ - public int endPc(int nth) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - return e.endPc; - } - - /** - * Sets endPc of the n-th entry. - * - * @param nth the n-th (>= 0). - * @param value new value. - */ - public void setEndPc(int nth, int value) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - e.endPc = value; - } - - /** - * Returns handlerPc of the n-th entry. - * - * @param nth the n-th (>= 0). - */ - public int handlerPc(int nth) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - return e.handlerPc; - } - - /** - * Sets handlerPc of the n-th entry. - * - * @param nth the n-th (>= 0). - * @param value new value. - */ - public void setHandlerPc(int nth, int value) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - e.handlerPc = value; - } - - /** - * Returns catchType of the n-th entry. - * - * @param nth the n-th (>= 0). - * @return an index into the constant_pool table, - * or zero if this exception handler is for all exceptions. - */ - public int catchType(int nth) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - return e.catchType; - } - - /** - * Sets catchType of the n-th entry. - * - * @param nth the n-th (>= 0). - * @param value new value. - */ - public void setCatchType(int nth, int value) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); - e.catchType = value; - } - - /** - * Copies the given exception table at the specified position - * in the table. - * - * @param index index (>= 0) at which the entry is to be inserted. - * @param offset the offset added to the code position. - */ - public void add(int index, ExceptionTable table, int offset) { - int len = table.size(); - while (--len >= 0) { - ExceptionTableEntry e - = (ExceptionTableEntry)table.entries.get(len); - add(index, e.startPc + offset, e.endPc + offset, - e.handlerPc + offset, e.catchType); - } - } - - /** - * Adds a new entry at the specified position in the table. - * - * @param index index (>= 0) at which the entry is to be inserted. - * @param start startPc - * @param end endPc - * @param handler handlerPc - * @param type catchType - */ - public void add(int index, int start, int end, int handler, int type) { - if (start < end) - entries.add(index, - new ExceptionTableEntry(start, end, handler, type)); - } - - /** - * Appends a new entry at the end of the table. - * - * @param start startPc - * @param end endPc - * @param handler handlerPc - * @param type catchType - */ - public void add(int start, int end, int handler, int type) { - if (start < end) - entries.add(new ExceptionTableEntry(start, end, handler, type)); - } - - /** - * Removes the entry at the specified position in the table. - * - * @param index the index of the removed entry. - */ - public void remove(int index) { - entries.remove(index); - } - - /** - * Makes a copy of this exception_table[]. - * Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public ExceptionTable copy(ConstPool newCp, Map classnames) { - ExceptionTable et = new ExceptionTable(newCp); - ConstPool srcCp = constPool; - int len = size(); - for (int i = 0; i < len; ++i) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); - int type = srcCp.copy(e.catchType, newCp, classnames); - et.add(e.startPc, e.endPc, e.handlerPc, type); - } - - return et; - } - - void shiftPc(int where, int gapLength, boolean exclusive) { - int len = size(); - for (int i = 0; i < len; ++i) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); - e.startPc = shiftPc(e.startPc, where, gapLength, exclusive); - e.endPc = shiftPc(e.endPc, where, gapLength, exclusive); - e.handlerPc = shiftPc(e.handlerPc, where, gapLength, exclusive); - } - } - - private static int shiftPc(int pc, int where, int gapLength, - boolean exclusive) { - if (pc > where || (exclusive && pc == where)) - pc += gapLength; - - return pc; - } - - void write(DataOutputStream out) throws IOException { - int len = size(); - out.writeShort(len); // exception_table_length - for (int i = 0; i < len; ++i) { - ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); - out.writeShort(e.startPc); - out.writeShort(e.endPc); - out.writeShort(e.handlerPc); - out.writeShort(e.catchType); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java deleted file mode 100644 index e20a621..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * Exceptions_attribute. - */ -public class ExceptionsAttribute extends AttributeInfo { - /** - * The name of this attribute "Exceptions". - */ - public static final String tag = "Exceptions"; - - ExceptionsAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a copy of an exceptions attribute. - * - * @param cp constant pool table. - * @param src source attribute. - */ - private ExceptionsAttribute(ConstPool cp, ExceptionsAttribute src, - Map classnames) { - super(cp, tag); - copyFrom(src, classnames); - } - - /** - * Constructs a new exceptions attribute. - * - * @param cp constant pool table. - */ - public ExceptionsAttribute(ConstPool cp) { - super(cp, tag); - byte[] data = new byte[2]; - data[0] = data[1] = 0; // empty - this.info = data; - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. It can be null. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - return new ExceptionsAttribute(newCp, this, classnames); - } - - /** - * Copies the contents from a source attribute. - * Specified class names are replaced during the copy. - * - * @param srcAttr source Exceptions attribute - * @param classnames pairs of replaced and substituted - * class names. - */ - private void copyFrom(ExceptionsAttribute srcAttr, Map classnames) { - ConstPool srcCp = srcAttr.constPool; - ConstPool destCp = this.constPool; - byte[] src = srcAttr.info; - int num = src.length; - byte[] dest = new byte[num]; - dest[0] = src[0]; - dest[1] = src[1]; // the number of elements. - for (int i = 2; i < num; i += 2) { - int index = ByteArray.readU16bit(src, i); - ByteArray.write16bit(srcCp.copy(index, destCp, classnames), - dest, i); - } - - this.info = dest; - } - - /** - * Returns exception_index_table[]. - */ - public int[] getExceptionIndexes() { - byte[] blist = info; - int n = blist.length; - if (n <= 2) - return null; - - int[] elist = new int[n / 2 - 1]; - int k = 0; - for (int j = 2; j < n; j += 2) - elist[k++] = ((blist[j] & 0xff) << 8) | (blist[j + 1] & 0xff); - - return elist; - } - - /** - * Returns the names of exceptions that the method may throw. - */ - public String[] getExceptions() { - byte[] blist = info; - int n = blist.length; - if (n <= 2) - return null; - - String[] elist = new String[n / 2 - 1]; - int k = 0; - for (int j = 2; j < n; j += 2) { - int index = ((blist[j] & 0xff) << 8) | (blist[j + 1] & 0xff); - elist[k++] = constPool.getClassInfo(index); - } - - return elist; - } - - /** - * Sets exception_index_table[]. - */ - public void setExceptionIndexes(int[] elist) { - int n = elist.length; - byte[] blist = new byte[n * 2 + 2]; - ByteArray.write16bit(n, blist, 0); - for (int i = 0; i < n; ++i) - ByteArray.write16bit(elist[i], blist, i * 2 + 2); - - info = blist; - } - - /** - * Sets the names of exceptions that the method may throw. - */ - public void setExceptions(String[] elist) { - int n = elist.length; - byte[] blist = new byte[n * 2 + 2]; - ByteArray.write16bit(n, blist, 0); - for (int i = 0; i < n; ++i) - ByteArray.write16bit(constPool.addClassInfo(elist[i]), - blist, i * 2 + 2); - - info = blist; - } - - /** - * Returns number_of_exceptions. - */ - public int tableLength() { return info.length / 2 - 1; } - - /** - * Returns the value of exception_index_table[nth]. - */ - public int getException(int nth) { - int index = nth * 2 + 2; // nth >= 0 - return ((info[index] & 0xff) << 8) | (info[index + 1] & 0xff); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/FieldInfo.java b/src/com/wenshuo/agent/javassist/bytecode/FieldInfo.java deleted file mode 100644 index 62dd9fa..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/FieldInfo.java +++ /dev/null @@ -1,276 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.List; -import java.util.ArrayList; - -/** - * field_info structure. - * - *

The following code adds a public field width - * of int type: - * 

- * ClassFile cf = ...
- * FieldInfo f = new FieldInfo(cf.getConstPool(), "width", "I");
- * f.setAccessFlags(AccessFlag.PUBLIC);
- * cf.addField(f);
- *
- * - * @see javassist.CtField#getFieldInfo() - */ -public final class FieldInfo { - ConstPool constPool; - int accessFlags; - int name; - String cachedName; - String cachedType; - int descriptor; - ArrayList attribute; // may be null. - - private FieldInfo(ConstPool cp) { - constPool = cp; - accessFlags = 0; - attribute = null; - } - - /** - * Constructs a field_info structure. - * - * @param cp a constant pool table - * @param fieldName field name - * @param desc field descriptor - * - * @see Descriptor - */ - public FieldInfo(ConstPool cp, String fieldName, String desc) { - this(cp); - name = cp.addUtf8Info(fieldName); - cachedName = fieldName; - descriptor = cp.addUtf8Info(desc); - } - - FieldInfo(ConstPool cp, DataInputStream in) throws IOException { - this(cp); - read(in); - } - - /** - * Returns a string representation of the object. - */ - public String toString() { - return getName() + " " + getDescriptor(); - } - - /** - * Copies all constant pool items to a given new constant pool - * and replaces the original items with the new ones. - * This is used for garbage collecting the items of removed fields - * and methods. - * - * @param cp the destination - */ - void compact(ConstPool cp) { - name = cp.addUtf8Info(getName()); - descriptor = cp.addUtf8Info(getDescriptor()); - attribute = AttributeInfo.copyAll(attribute, cp); - constPool = cp; - } - - void prune(ConstPool cp) { - ArrayList newAttributes = new ArrayList(); - AttributeInfo invisibleAnnotations - = getAttribute(AnnotationsAttribute.invisibleTag); - if (invisibleAnnotations != null) { - invisibleAnnotations = invisibleAnnotations.copy(cp, null); - newAttributes.add(invisibleAnnotations); - } - - AttributeInfo visibleAnnotations - = getAttribute(AnnotationsAttribute.visibleTag); - if (visibleAnnotations != null) { - visibleAnnotations = visibleAnnotations.copy(cp, null); - newAttributes.add(visibleAnnotations); - } - - AttributeInfo signature - = getAttribute(SignatureAttribute.tag); - if (signature != null) { - signature = signature.copy(cp, null); - newAttributes.add(signature); - } - - int index = getConstantValue(); - if (index != 0) { - index = constPool.copy(index, cp, null); - newAttributes.add(new ConstantAttribute(cp, index)); - } - - attribute = newAttributes; - name = cp.addUtf8Info(getName()); - descriptor = cp.addUtf8Info(getDescriptor()); - constPool = cp; - } - - /** - * Returns the constant pool table used - * by this field_info. - */ - public ConstPool getConstPool() { - return constPool; - } - - /** - * Returns the field name. - */ - public String getName() { - if (cachedName == null) - cachedName = constPool.getUtf8Info(name); - - return cachedName; - } - - /** - * Sets the field name. - */ - public void setName(String newName) { - name = constPool.addUtf8Info(newName); - cachedName = newName; - } - - /** - * Returns the access flags. - * - * @see AccessFlag - */ - public int getAccessFlags() { - return accessFlags; - } - - /** - * Sets the access flags. - * - * @see AccessFlag - */ - public void setAccessFlags(int acc) { - accessFlags = acc; - } - - /** - * Returns the field descriptor. - * - * @see Descriptor - */ - public String getDescriptor() { - return constPool.getUtf8Info(descriptor); - } - - /** - * Sets the field descriptor. - * - * @see Descriptor - */ - public void setDescriptor(String desc) { - if (!desc.equals(getDescriptor())) - descriptor = constPool.addUtf8Info(desc); - } - - /** - * Finds a ConstantValue attribute and returns the index into - * the constant_pool table. - * - * @return 0 if a ConstantValue attribute is not found. - */ - public int getConstantValue() { - if ((accessFlags & AccessFlag.STATIC) == 0) - return 0; - - ConstantAttribute attr - = (ConstantAttribute)getAttribute(ConstantAttribute.tag); - if (attr == null) - return 0; - else - return attr.getConstantValue(); - } - - /** - * Returns all the attributes. The returned List object - * is shared with this object. If you add a new attribute to the list, - * the attribute is also added to the field represented by this - * object. If you remove an attribute from the list, it is also removed - * from the field. - * - * @return a list of AttributeInfo objects. - * @see AttributeInfo - */ - public List getAttributes() { - if (attribute == null) - attribute = new ArrayList(); - - return attribute; - } - - /** - * Returns the attribute with the specified name. - * It returns null if the specified attribute is not found. - * - * @param name attribute name - * @see #getAttributes() - */ - public AttributeInfo getAttribute(String name) { - return AttributeInfo.lookup(attribute, name); - } - - /** - * Appends an attribute. If there is already an attribute with - * the same name, the new one substitutes for it. - * - * @see #getAttributes() - */ - public void addAttribute(AttributeInfo info) { - if (attribute == null) - attribute = new ArrayList(); - - AttributeInfo.remove(attribute, info.getName()); - attribute.add(info); - } - - private void read(DataInputStream in) throws IOException { - accessFlags = in.readUnsignedShort(); - name = in.readUnsignedShort(); - descriptor = in.readUnsignedShort(); - int n = in.readUnsignedShort(); - attribute = new ArrayList(); - for (int i = 0; i < n; ++i) - attribute.add(AttributeInfo.read(constPool, in)); - } - - void write(DataOutputStream out) throws IOException { - out.writeShort(accessFlags); - out.writeShort(name); - out.writeShort(descriptor); - if (attribute == null) - out.writeShort(0); - else { - out.writeShort(attribute.size()); - AttributeInfo.writeAll(attribute, out); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java deleted file mode 100644 index 895c320..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java +++ /dev/null @@ -1,242 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.util.Map; -import java.io.IOException; - -/** - * InnerClasses_attribute. - */ -public class InnerClassesAttribute extends AttributeInfo { - /** - * The name of this attribute "InnerClasses". - */ - public static final String tag = "InnerClasses"; - - InnerClassesAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - private InnerClassesAttribute(ConstPool cp, byte[] info) { - super(cp, tag, info); - } - - /** - * Constructs an empty InnerClasses attribute. - * - * @see #append(String, String, String, int) - */ - public InnerClassesAttribute(ConstPool cp) { - super(cp, tag, new byte[2]); - ByteArray.write16bit(0, get(), 0); - } - - /** - * Returns number_of_classes. - */ - public int tableLength() { return ByteArray.readU16bit(get(), 0); } - - /** - * Returns classes[nth].inner_class_info_index. - */ - public int innerClassIndex(int nth) { - return ByteArray.readU16bit(get(), nth * 8 + 2); - } - - /** - * Returns the class name indicated - * by classes[nth].inner_class_info_index. - * - * @return null or the class name. - */ - public String innerClass(int nth) { - int i = innerClassIndex(nth); - if (i == 0) - return null; - else - return constPool.getClassInfo(i); - } - - /** - * Sets classes[nth].inner_class_info_index to - * the given index. - */ - public void setInnerClassIndex(int nth, int index) { - ByteArray.write16bit(index, get(), nth * 8 + 2); - } - - /** - * Returns classes[nth].outer_class_info_index. - */ - public int outerClassIndex(int nth) { - return ByteArray.readU16bit(get(), nth * 8 + 4); - } - - /** - * Returns the class name indicated - * by classes[nth].outer_class_info_index. - * - * @return null or the class name. - */ - public String outerClass(int nth) { - int i = outerClassIndex(nth); - if (i == 0) - return null; - else - return constPool.getClassInfo(i); - } - - /** - * Sets classes[nth].outer_class_info_index to - * the given index. - */ - public void setOuterClassIndex(int nth, int index) { - ByteArray.write16bit(index, get(), nth * 8 + 4); - } - - /** - * Returns classes[nth].inner_name_index. - */ - public int innerNameIndex(int nth) { - return ByteArray.readU16bit(get(), nth * 8 + 6); - } - - /** - * Returns the simple class name indicated - * by classes[nth].inner_name_index. - * - * @return null or the class name. - */ - public String innerName(int nth) { - int i = innerNameIndex(nth); - if (i == 0) - return null; - else - return constPool.getUtf8Info(i); - } - - /** - * Sets classes[nth].inner_name_index to - * the given index. - */ - public void setInnerNameIndex(int nth, int index) { - ByteArray.write16bit(index, get(), nth * 8 + 6); - } - - /** - * Returns classes[nth].inner_class_access_flags. - */ - public int accessFlags(int nth) { - return ByteArray.readU16bit(get(), nth * 8 + 8); - } - - /** - * Sets classes[nth].inner_class_access_flags to - * the given index. - */ - public void setAccessFlags(int nth, int flags) { - ByteArray.write16bit(flags, get(), nth * 8 + 8); - } - - /** - * Appends a new entry. - * - * @param inner inner_class_info_index - * @param outer outer_class_info_index - * @param name inner_name_index - * @param flags inner_class_access_flags - */ - public void append(String inner, String outer, String name, int flags) { - int i = constPool.addClassInfo(inner); - int o = constPool.addClassInfo(outer); - int n = constPool.addUtf8Info(name); - append(i, o, n, flags); - } - - /** - * Appends a new entry. - * - * @param inner inner_class_info_index - * @param outer outer_class_info_index - * @param name inner_name_index - * @param flags inner_class_access_flags - */ - public void append(int inner, int outer, int name, int flags) { - byte[] data = get(); - int len = data.length; - byte[] newData = new byte[len + 8]; - for (int i = 2; i < len; ++i) - newData[i] = data[i]; - - int n = ByteArray.readU16bit(data, 0); - ByteArray.write16bit(n + 1, newData, 0); - - ByteArray.write16bit(inner, newData, len); - ByteArray.write16bit(outer, newData, len + 2); - ByteArray.write16bit(name, newData, len + 4); - ByteArray.write16bit(flags, newData, len + 6); - - set(newData); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - byte[] src = get(); - byte[] dest = new byte[src.length]; - ConstPool cp = getConstPool(); - InnerClassesAttribute attr = new InnerClassesAttribute(newCp, dest); - int n = ByteArray.readU16bit(src, 0); - ByteArray.write16bit(n, dest, 0); - int j = 2; - for (int i = 0; i < n; ++i) { - int innerClass = ByteArray.readU16bit(src, j); - int outerClass = ByteArray.readU16bit(src, j + 2); - int innerName = ByteArray.readU16bit(src, j + 4); - int innerAccess = ByteArray.readU16bit(src, j + 6); - - if (innerClass != 0) - innerClass = cp.copy(innerClass, newCp, classnames); - - ByteArray.write16bit(innerClass, dest, j); - - if (outerClass != 0) - outerClass = cp.copy(outerClass, newCp, classnames); - - ByteArray.write16bit(outerClass, dest, j + 2); - - if (innerName != 0) - innerName = cp.copy(innerName, newCp, classnames); - - ByteArray.write16bit(innerName, dest, j + 4); - ByteArray.write16bit(innerAccess, dest, j + 6); - j += 8; - } - - return attr; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java b/src/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java deleted file mode 100644 index c9cc815..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java +++ /dev/null @@ -1,295 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode; - -import java.io.PrintStream; - -import com.wenshuo.agent.javassist.CtMethod; - -/** - * Simple utility class for printing the bytecode instructions of a method. - * - * @author Jason T. Greene - */ -public class InstructionPrinter implements Opcode { - - private final static String opcodes[] = Mnemonic.OPCODE; - private final PrintStream stream; - - /** - * Constructs a InstructionPrinter object. - */ - public InstructionPrinter(PrintStream stream) { - this.stream = stream; - } - - /** - * Prints the bytecode instructions of a given method. - */ - public static void print(CtMethod method, PrintStream stream) { - (new InstructionPrinter(stream)).print(method); - } - - /** - * Prints the bytecode instructions of a given method. - */ - public void print(CtMethod method) { - MethodInfo info = method.getMethodInfo2(); - ConstPool pool = info.getConstPool(); - CodeAttribute code = info.getCodeAttribute(); - if (code == null) - return; - - CodeIterator iterator = code.iterator(); - while (iterator.hasNext()) { - int pos; - try { - pos = iterator.next(); - } catch (BadBytecode e) { - throw new RuntimeException(e); - } - - stream.println(pos + ": " + instructionString(iterator, pos, pool)); - } - } - - /** - * Gets a string representation of the bytecode instruction at the specified - * position. - */ - public static String instructionString(CodeIterator iter, int pos, ConstPool pool) { - int opcode = iter.byteAt(pos); - - if (opcode > opcodes.length || opcode < 0) - throw new IllegalArgumentException("Invalid opcode, opcode: " + opcode + " pos: "+ pos); - - String opstring = opcodes[opcode]; - switch (opcode) { - case BIPUSH: - return opstring + " " + iter.byteAt(pos + 1); - case SIPUSH: - return opstring + " " + iter.s16bitAt(pos + 1); - case LDC: - return opstring + " " + ldc(pool, iter.byteAt(pos + 1)); - case LDC_W : - case LDC2_W : - return opstring + " " + ldc(pool, iter.u16bitAt(pos + 1)); - case ILOAD: - case LLOAD: - case FLOAD: - case DLOAD: - case ALOAD: - case ISTORE: - case LSTORE: - case FSTORE: - case DSTORE: - case ASTORE: - return opstring + " " + iter.byteAt(pos + 1); - case IFEQ: - case IFGE: - case IFGT: - case IFLE: - case IFLT: - case IFNE: - case IFNONNULL: - case IFNULL: - case IF_ACMPEQ: - case IF_ACMPNE: - case IF_ICMPEQ: - case IF_ICMPGE: - case IF_ICMPGT: - case IF_ICMPLE: - case IF_ICMPLT: - case IF_ICMPNE: - return opstring + " " + (iter.s16bitAt(pos + 1) + pos); - case IINC: - return opstring + " " + iter.byteAt(pos + 1) + ", " + iter.signedByteAt(pos + 2); - case GOTO: - case JSR: - return opstring + " " + (iter.s16bitAt(pos + 1) + pos); - case RET: - return opstring + " " + iter.byteAt(pos + 1); - case TABLESWITCH: - return tableSwitch(iter, pos); - case LOOKUPSWITCH: - return lookupSwitch(iter, pos); - case GETSTATIC: - case PUTSTATIC: - case GETFIELD: - case PUTFIELD: - return opstring + " " + fieldInfo(pool, iter.u16bitAt(pos + 1)); - case INVOKEVIRTUAL: - case INVOKESPECIAL: - case INVOKESTATIC: - return opstring + " " + methodInfo(pool, iter.u16bitAt(pos + 1)); - case INVOKEINTERFACE: - return opstring + " " + interfaceMethodInfo(pool, iter.u16bitAt(pos + 1)); - case INVOKEDYNAMIC: - return opstring + " " + iter.u16bitAt(pos + 1); - case NEW: - return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); - case NEWARRAY: - return opstring + " " + arrayInfo(iter.byteAt(pos + 1)); - case ANEWARRAY: - case CHECKCAST: - return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); - case WIDE: - return wide(iter, pos); - case MULTIANEWARRAY: - return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); - case GOTO_W: - case JSR_W: - return opstring + " " + (iter.s32bitAt(pos + 1)+ pos); - default: - return opstring; - } - } - - - private static String wide(CodeIterator iter, int pos) { - int opcode = iter.byteAt(pos + 1); - int index = iter.u16bitAt(pos + 2); - switch (opcode) { - case ILOAD: - case LLOAD: - case FLOAD: - case DLOAD: - case ALOAD: - case ISTORE: - case LSTORE: - case FSTORE: - case DSTORE: - case ASTORE: - case IINC: - case RET: - return opcodes[opcode] + " " + index; - default: - throw new RuntimeException("Invalid WIDE operand"); - } - } - - - private static String arrayInfo(int type) { - switch (type) { - case T_BOOLEAN: - return "boolean"; - case T_CHAR: - return "char"; - case T_BYTE: - return "byte"; - case T_SHORT: - return "short"; - case T_INT: - return "int"; - case T_LONG: - return "long"; - case T_FLOAT: - return "float"; - case T_DOUBLE: - return "double"; - default: - throw new RuntimeException("Invalid array type"); - } - } - - - private static String classInfo(ConstPool pool, int index) { - return "#" + index + " = Class " + pool.getClassInfo(index); - } - - - private static String interfaceMethodInfo(ConstPool pool, int index) { - return "#" + index + " = Method " - + pool.getInterfaceMethodrefClassName(index) + "." - + pool.getInterfaceMethodrefName(index) + "(" - + pool.getInterfaceMethodrefType(index) + ")"; - } - - private static String methodInfo(ConstPool pool, int index) { - return "#" + index + " = Method " - + pool.getMethodrefClassName(index) + "." - + pool.getMethodrefName(index) + "(" - + pool.getMethodrefType(index) + ")"; - } - - - private static String fieldInfo(ConstPool pool, int index) { - return "#" + index + " = Field " - + pool.getFieldrefClassName(index) + "." - + pool.getFieldrefName(index) + "(" - + pool.getFieldrefType(index) + ")"; - } - - - private static String lookupSwitch(CodeIterator iter, int pos) { - StringBuffer buffer = new StringBuffer("lookupswitch {\n"); - int index = (pos & ~3) + 4; - // default - buffer.append("\t\tdefault: ").append(pos + iter.s32bitAt(index)).append("\n"); - int npairs = iter.s32bitAt(index += 4); - int end = npairs * 8 + (index += 4); - - for (; index < end; index += 8) { - int match = iter.s32bitAt(index); - int target = iter.s32bitAt(index + 4) + pos; - buffer.append("\t\t").append(match).append(": ").append(target).append("\n"); - } - - buffer.setCharAt(buffer.length() - 1, '}'); - return buffer.toString(); - } - - - private static String tableSwitch(CodeIterator iter, int pos) { - StringBuffer buffer = new StringBuffer("tableswitch {\n"); - int index = (pos & ~3) + 4; - // default - buffer.append("\t\tdefault: ").append(pos + iter.s32bitAt(index)).append("\n"); - int low = iter.s32bitAt(index += 4); - int high = iter.s32bitAt(index += 4); - int end = (high - low + 1) * 4 + (index += 4); - - // Offset table - for (int key = low; index < end; index += 4, key++) { - int target = iter.s32bitAt(index) + pos; - buffer.append("\t\t").append(key).append(": ").append(target).append("\n"); - } - - buffer.setCharAt(buffer.length() - 1, '}'); - return buffer.toString(); - } - - - private static String ldc(ConstPool pool, int index) { - int tag = pool.getTag(index); - switch (tag) { - case ConstPool.CONST_String: - return "#" + index + " = \"" + pool.getStringInfo(index) + "\""; - case ConstPool.CONST_Integer: - return "#" + index + " = int " + pool.getIntegerInfo(index); - case ConstPool.CONST_Float: - return "#" + index + " = float " + pool.getFloatInfo(index); - case ConstPool.CONST_Long: - return "#" + index + " = long " + pool.getLongInfo(index); - case ConstPool.CONST_Double: - return "#" + index + " = int " + pool.getDoubleInfo(index); - case ConstPool.CONST_Class: - return classInfo(pool, index); - default: - throw new RuntimeException("bad LDC: " + tag); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java deleted file mode 100644 index c8a9dcc..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * LineNumberTable_attribute. - */ -public class LineNumberAttribute extends AttributeInfo { - /** - * The name of this attribute "LineNumberTable". - */ - public static final String tag = "LineNumberTable"; - - LineNumberAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - private LineNumberAttribute(ConstPool cp, byte[] i) { - super(cp, tag, i); - } - - /** - * Returns line_number_table_length. - * This represents the number of entries in the table. - */ - public int tableLength() { - return ByteArray.readU16bit(info, 0); - } - - /** - * Returns line_number_table[i].start_pc. - * This represents the index into the code array at which the code - * for a new line in the original source file begins. - * - * @param i the i-th entry. - */ - public int startPc(int i) { - return ByteArray.readU16bit(info, i * 4 + 2); - } - - /** - * Returns line_number_table[i].line_number. - * This represents the corresponding line number in the original - * source file. - * - * @param i the i-th entry. - */ - public int lineNumber(int i) { - return ByteArray.readU16bit(info, i * 4 + 4); - } - - /** - * Returns the line number corresponding to the specified bytecode. - * - * @param pc the index into the code array. - */ - public int toLineNumber(int pc) { - int n = tableLength(); - int i = 0; - for (; i < n; ++i) - if (pc < startPc(i)) - if (i == 0) - return lineNumber(0); - else - break; - - return lineNumber(i - 1); - } - - /** - * Returns the index into the code array at which the code for - * the specified line begins. - * - * @param line the line number. - * @return -1 if the specified line is not found. - */ - public int toStartPc(int line) { - int n = tableLength(); - for (int i = 0; i < n; ++i) - if (line == lineNumber(i)) - return startPc(i); - - return -1; - } - - /** - * Used as a return type of toNearPc(). - */ - static public class Pc { - /** - * The index into the code array. - */ - public int index; - /** - * The line number. - */ - public int line; - } - - /** - * Returns the index into the code array at which the code for - * the specified line (or the nearest line after the specified one) - * begins. - * - * @param line the line number. - * @return a pair of the index and the line number of the - * bytecode at that index. - */ - public Pc toNearPc(int line) { - int n = tableLength(); - int nearPc = 0; - int distance = 0; - if (n > 0) { - distance = lineNumber(0) - line; - nearPc = startPc(0); - } - - for (int i = 1; i < n; ++i) { - int d = lineNumber(i) - line; - if ((d < 0 && d > distance) - || (d >= 0 && (d < distance || distance < 0))) { - distance = d; - nearPc = startPc(i); - } - } - - Pc res = new Pc(); - res.index = nearPc; - res.line = line + distance; - return res; - } - - /** - * Makes a copy. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames should be null. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - byte[] src = info; - int num = src.length; - byte[] dest = new byte[num]; - for (int i = 0; i < num; ++i) - dest[i] = src[i]; - - LineNumberAttribute attr = new LineNumberAttribute(newCp, dest); - return attr; - } - - /** - * Adjusts start_pc if bytecode is inserted in a method body. - */ - void shiftPc(int where, int gapLength, boolean exclusive) { - int n = tableLength(); - for (int i = 0; i < n; ++i) { - int pos = i * 4 + 2; - int pc = ByteArray.readU16bit(info, pos); - if (pc > where || (exclusive && pc == where)) - ByteArray.write16bit(pc + gapLength, info, pos); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java deleted file mode 100644 index 8ce0ccd..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java +++ /dev/null @@ -1,334 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * LocalVariableTable_attribute. - */ -public class LocalVariableAttribute extends AttributeInfo { - /** - * The name of this attribute "LocalVariableTable". - */ - public static final String tag = "LocalVariableTable"; - - /** - * The name of the attribute "LocalVariableTypeTable". - */ - public static final String typeTag = "LocalVariableTypeTable"; - - /** - * Constructs an empty LocalVariableTable. - */ - public LocalVariableAttribute(ConstPool cp) { - super(cp, tag, new byte[2]); - ByteArray.write16bit(0, info, 0); - } - - /** - * Constructs an empty LocalVariableTable. - * - * @param name the attribute name. - * LocalVariableAttribute.tag or - * LocalVariableAttribute.typeTag. - * @see #tag - * @see #typeTag - * @since 3.1 - * @deprecated - */ - public LocalVariableAttribute(ConstPool cp, String name) { - super(cp, name, new byte[2]); - ByteArray.write16bit(0, info, 0); - } - - LocalVariableAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - LocalVariableAttribute(ConstPool cp, String name, byte[] i) { - super(cp, name, i); - } - - /** - * Appends a new entry to local_variable_table. - * - * @param startPc start_pc - * @param length length - * @param nameIndex name_index - * @param descriptorIndex descriptor_index - * @param index index - */ - public void addEntry(int startPc, int length, int nameIndex, - int descriptorIndex, int index) { - int size = info.length; - byte[] newInfo = new byte[size + 10]; - ByteArray.write16bit(tableLength() + 1, newInfo, 0); - for (int i = 2; i < size; ++i) - newInfo[i] = info[i]; - - ByteArray.write16bit(startPc, newInfo, size); - ByteArray.write16bit(length, newInfo, size + 2); - ByteArray.write16bit(nameIndex, newInfo, size + 4); - ByteArray.write16bit(descriptorIndex, newInfo, size + 6); - ByteArray.write16bit(index, newInfo, size + 8); - info = newInfo; - } - - void renameClass(String oldname, String newname) { - ConstPool cp = getConstPool(); - int n = tableLength(); - for (int i = 0; i < n; ++i) { - int pos = i * 10 + 2; - int index = ByteArray.readU16bit(info, pos + 6); - if (index != 0) { - String desc = cp.getUtf8Info(index); - desc = renameEntry(desc, oldname, newname); - ByteArray.write16bit(cp.addUtf8Info(desc), info, pos + 6); - } - } - } - - String renameEntry(String desc, String oldname, String newname) { - return Descriptor.rename(desc, oldname, newname); - } - - void renameClass(Map classnames) { - ConstPool cp = getConstPool(); - int n = tableLength(); - for (int i = 0; i < n; ++i) { - int pos = i * 10 + 2; - int index = ByteArray.readU16bit(info, pos + 6); - if (index != 0) { - String desc = cp.getUtf8Info(index); - desc = renameEntry(desc, classnames); - ByteArray.write16bit(cp.addUtf8Info(desc), info, pos + 6); - } - } - } - - String renameEntry(String desc, Map classnames) { - return Descriptor.rename(desc, classnames); - } - - /** - * For each local_variable_table[i].index, - * this method increases index by delta. - * - * @param lessThan the index does not change if it - * is less than this value. - */ - public void shiftIndex(int lessThan, int delta) { - int size = info.length; - for (int i = 2; i < size; i += 10){ - int org = ByteArray.readU16bit(info, i + 8); - if (org >= lessThan) - ByteArray.write16bit(org + delta, info, i + 8); - } - } - - /** - * Returns local_variable_table_length. - * This represents the number of entries in the table. - */ - public int tableLength() { - return ByteArray.readU16bit(info, 0); - } - - /** - * Returns local_variable_table[i].start_pc. - * This represents the index into the code array from which the local - * variable is effective. - * - * @param i the i-th entry. - */ - public int startPc(int i) { - return ByteArray.readU16bit(info, i * 10 + 2); - } - - /** - * Returns local_variable_table[i].length. - * This represents the length of the code region in which the local - * variable is effective. - * - * @param i the i-th entry. - */ - public int codeLength(int i) { - return ByteArray.readU16bit(info, i * 10 + 4); - } - - /** - * Adjusts start_pc and length if bytecode is inserted in a method body. - */ - void shiftPc(int where, int gapLength, boolean exclusive) { - int n = tableLength(); - for (int i = 0; i < n; ++i) { - int pos = i * 10 + 2; - int pc = ByteArray.readU16bit(info, pos); - int len = ByteArray.readU16bit(info, pos + 2); - - /* if pc == 0, then the local variable is a method parameter. - */ - if (pc > where || (exclusive && pc == where && pc != 0)) - ByteArray.write16bit(pc + gapLength, info, pos); - else if (pc + len > where || (exclusive && pc + len == where)) - ByteArray.write16bit(len + gapLength, info, pos + 2); - } - } - - /** - * Returns the value of local_variable_table[i].name_index. - * This represents the name of the local variable. - * - * @param i the i-th entry. - */ - public int nameIndex(int i) { - return ByteArray.readU16bit(info, i * 10 + 6); - } - - /** - * Returns the name of the local variable - * specified by local_variable_table[i].name_index. - * - * @param i the i-th entry. - */ - public String variableName(int i) { - return getConstPool().getUtf8Info(nameIndex(i)); - } - - /** - * Returns the value of - * local_variable_table[i].descriptor_index. - * This represents the type descriptor of the local variable. - *

- * If this attribute represents a LocalVariableTypeTable attribute, - * this method returns the value of - * local_variable_type_table[i].signature_index. - * It represents the type of the local variable. - * - * @param i the i-th entry. - */ - public int descriptorIndex(int i) { - return ByteArray.readU16bit(info, i * 10 + 8); - } - - /** - * This method is equivalent to descriptorIndex(). - * If this attribute represents a LocalVariableTypeTable attribute, - * this method should be used instead of descriptorIndex() - * since the method name is more appropriate. - * - * @param i the i-th entry. - * @see #descriptorIndex(int) - * @see SignatureAttribute#toFieldSignature(String) - */ - public int signatureIndex(int i) { - return descriptorIndex(i); - } - - /** - * Returns the type descriptor of the local variable - * specified by local_variable_table[i].descriptor_index. - *

- * If this attribute represents a LocalVariableTypeTable attribute, - * this method returns the type signature of the local variable - * specified by local_variable_type_table[i].signature_index. - * - * @param i the i-th entry. - */ - public String descriptor(int i) { - return getConstPool().getUtf8Info(descriptorIndex(i)); - } - - /** - * This method is equivalent to descriptor(). - * If this attribute represents a LocalVariableTypeTable attribute, - * this method should be used instead of descriptor() - * since the method name is more appropriate. - * - *

To parse the string, call toFieldSignature(String) - * in SignatureAttribute. - * - * @param i the i-th entry. - * @see #descriptor(int) - * @see SignatureAttribute#toFieldSignature(String) - */ - public String signature(int i) { - return descriptor(i); - } - - /** - * Returns local_variable_table[i].index. - * This represents the index of the local variable. - * - * @param i the i-th entry. - */ - public int index(int i) { - return ByteArray.readU16bit(info, i * 10 + 10); - } - - /** - * Makes a copy. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames should be null. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - byte[] src = get(); - byte[] dest = new byte[src.length]; - ConstPool cp = getConstPool(); - LocalVariableAttribute attr = makeThisAttr(newCp, dest); - int n = ByteArray.readU16bit(src, 0); - ByteArray.write16bit(n, dest, 0); - int j = 2; - for (int i = 0; i < n; ++i) { - int start = ByteArray.readU16bit(src, j); - int len = ByteArray.readU16bit(src, j + 2); - int name = ByteArray.readU16bit(src, j + 4); - int type = ByteArray.readU16bit(src, j + 6); - int index = ByteArray.readU16bit(src, j + 8); - - ByteArray.write16bit(start, dest, j); - ByteArray.write16bit(len, dest, j + 2); - if (name != 0) - name = cp.copy(name, newCp, null); - - ByteArray.write16bit(name, dest, j + 4); - - if (type != 0) { - String sig = cp.getUtf8Info(type); - sig = Descriptor.rename(sig, classnames); - type = newCp.addUtf8Info(sig); - } - - ByteArray.write16bit(type, dest, j + 6); - ByteArray.write16bit(index, dest, j + 8); - j += 10; - } - - return attr; - } - - // LocalVariableTypeAttribute overrides this method. - LocalVariableAttribute makeThisAttr(ConstPool cp, byte[] dest) { - return new LocalVariableAttribute(cp, tag, dest); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java deleted file mode 100644 index 57bd395..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java +++ /dev/null @@ -1,63 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * LocalVariableTypeTable_attribute. - * - * @since 3.11 - */ -public class LocalVariableTypeAttribute extends LocalVariableAttribute { - /** - * The name of the attribute "LocalVariableTypeTable". - */ - public static final String tag = LocalVariableAttribute.typeTag; - - /** - * Constructs an empty LocalVariableTypeTable. - */ - public LocalVariableTypeAttribute(ConstPool cp) { - super(cp, tag, new byte[2]); - ByteArray.write16bit(0, info, 0); - } - - LocalVariableTypeAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - private LocalVariableTypeAttribute(ConstPool cp, byte[] dest) { - super(cp, tag, dest); - } - - String renameEntry(String desc, String oldname, String newname) { - return SignatureAttribute.renameClass(desc, oldname, newname); - } - - String renameEntry(String desc, Map classnames) { - return SignatureAttribute.renameClass(desc, classnames); - } - - LocalVariableAttribute makeThisAttr(ConstPool cp, byte[] dest) { - return new LocalVariableTypeAttribute(cp, dest); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/LongVector.java b/src/com/wenshuo/agent/javassist/bytecode/LongVector.java deleted file mode 100644 index 16f40e2..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/LongVector.java +++ /dev/null @@ -1,64 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -final class LongVector { - static final int ASIZE = 128; - static final int ABITS = 7; // ASIZE = 2^ABITS - static final int VSIZE = 8; - private ConstInfo[][] objects; - private int elements; - - public LongVector() { - objects = new ConstInfo[VSIZE][]; - elements = 0; - } - - public LongVector(int initialSize) { - int vsize = ((initialSize >> ABITS) & ~(VSIZE - 1)) + VSIZE; - objects = new ConstInfo[vsize][]; - elements = 0; - } - - public int size() { return elements; } - - public int capacity() { return objects.length * ASIZE; } - - public ConstInfo elementAt(int i) { - if (i < 0 || elements <= i) - return null; - - return objects[i >> ABITS][i & (ASIZE - 1)]; - } - - public void addElement(ConstInfo value) { - int nth = elements >> ABITS; - int offset = elements & (ASIZE - 1); - int len = objects.length; - if (nth >= len) { - ConstInfo[][] newObj = new ConstInfo[len + VSIZE][]; - System.arraycopy(objects, 0, newObj, 0, len); - objects = newObj; - } - - if (objects[nth] == null) - objects[nth] = new ConstInfo[ASIZE]; - - objects[nth][offset] = value; - elements++; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/MethodInfo.java b/src/com/wenshuo/agent/javassist/bytecode/MethodInfo.java deleted file mode 100644 index dbe32ca..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/MethodInfo.java +++ /dev/null @@ -1,566 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.IOException; -import java.util.ArrayList; -import java.util.List; -import java.util.Map; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.stackmap.MapMaker; - -/** - * method_info structure. - * - *

The bytecode sequence of the method is represented - * by a CodeAttribute object. - * - *

The following code adds the default constructor to a class: - * of int type: - * 

- * ClassFile cf = ...
- * Bytecode code = new Bytecode(cf.getConstPool());
- * code.addAload(0);
- * code.addInvokespecial("java/lang/Object", MethodInfo.nameInit, "()V");
- * code.addReturn(null);
- * code.setMaxLocals(1);
- *
- * MethodInfo minfo = new MethodInfo(cf.getConstPool(), MethodInfo.nameInit, "()V");
- * minfo.setCodeAttribute(code.toCodeAttribute());
- * cf.addMethod(minfo);
- *
- * - * @see #getCodeAttribute() - * @see CodeAttribute - * @see Bytecode - * @see javassist.CtMethod#getMethodInfo() - * @see javassist.CtConstructor#getMethodInfo() - */ -public class MethodInfo { - ConstPool constPool; - int accessFlags; - int name; - String cachedName; - int descriptor; - ArrayList attribute; // may be null - - /** - * If this value is true, Javassist maintains a StackMap attribute - * generated by the preverify tool of J2ME (CLDC). The initial - * value of this field is false. - */ - public static boolean doPreverify = false; - - /** - * The name of constructors: <init>. - */ - public static final String nameInit = ""; - - /** - * The name of class initializer (static initializer): - * <clinit>. - */ - public static final String nameClinit = ""; - - private MethodInfo(ConstPool cp) { - constPool = cp; - attribute = null; - } - - /** - * Constructs a method_info structure. The initial value of - * access_flags is zero. - * - * @param cp - * a constant pool table - * @param methodname - * method name - * @param desc - * method descriptor - * @see Descriptor - */ - public MethodInfo(ConstPool cp, String methodname, String desc) { - this(cp); - accessFlags = 0; - name = cp.addUtf8Info(methodname); - cachedName = methodname; - descriptor = constPool.addUtf8Info(desc); - } - - MethodInfo(ConstPool cp, DataInputStream in) throws IOException { - this(cp); - read(in); - } - - /** - * Constructs a copy of method_info structure. Class names - * appearing in the source method_info are renamed according - * to classnameMap. - * - *

- * Note: only Code and Exceptions attributes - * are copied from the source. The other attributes are ignored. - * - * @param cp - * a constant pool table - * @param methodname - * a method name - * @param src - * a source method_info - * @param classnameMap - * specifies pairs of replaced and substituted name. - * @see Descriptor - */ - public MethodInfo(ConstPool cp, String methodname, MethodInfo src, - Map classnameMap) throws BadBytecode { - this(cp); - read(src, methodname, classnameMap); - } - - /** - * Returns a string representation of the object. - */ - public String toString() { - return getName() + " " + getDescriptor(); - } - - /** - * Copies all constant pool items to a given new constant pool - * and replaces the original items with the new ones. - * This is used for garbage collecting the items of removed fields - * and methods. - * - * @param cp the destination - */ - void compact(ConstPool cp) { - name = cp.addUtf8Info(getName()); - descriptor = cp.addUtf8Info(getDescriptor()); - attribute = AttributeInfo.copyAll(attribute, cp); - constPool = cp; - } - - void prune(ConstPool cp) { - ArrayList newAttributes = new ArrayList(); - - AttributeInfo invisibleAnnotations - = getAttribute(AnnotationsAttribute.invisibleTag); - if (invisibleAnnotations != null) { - invisibleAnnotations = invisibleAnnotations.copy(cp, null); - newAttributes.add(invisibleAnnotations); - } - - AttributeInfo visibleAnnotations - = getAttribute(AnnotationsAttribute.visibleTag); - if (visibleAnnotations != null) { - visibleAnnotations = visibleAnnotations.copy(cp, null); - newAttributes.add(visibleAnnotations); - } - - AttributeInfo parameterInvisibleAnnotations - = getAttribute(ParameterAnnotationsAttribute.invisibleTag); - if (parameterInvisibleAnnotations != null) { - parameterInvisibleAnnotations = parameterInvisibleAnnotations.copy(cp, null); - newAttributes.add(parameterInvisibleAnnotations); - } - - AttributeInfo parameterVisibleAnnotations - = getAttribute(ParameterAnnotationsAttribute.visibleTag); - if (parameterVisibleAnnotations != null) { - parameterVisibleAnnotations = parameterVisibleAnnotations.copy(cp, null); - newAttributes.add(parameterVisibleAnnotations); - } - - AnnotationDefaultAttribute defaultAttribute - = (AnnotationDefaultAttribute) getAttribute(AnnotationDefaultAttribute.tag); - if (defaultAttribute != null) - newAttributes.add(defaultAttribute); - - ExceptionsAttribute ea = getExceptionsAttribute(); - if (ea != null) - newAttributes.add(ea); - - AttributeInfo signature - = getAttribute(SignatureAttribute.tag); - if (signature != null) { - signature = signature.copy(cp, null); - newAttributes.add(signature); - } - - attribute = newAttributes; - name = cp.addUtf8Info(getName()); - descriptor = cp.addUtf8Info(getDescriptor()); - constPool = cp; - } - - /** - * Returns a method name. - */ - public String getName() { - if (cachedName == null) - cachedName = constPool.getUtf8Info(name); - - return cachedName; - } - - /** - * Sets a method name. - */ - public void setName(String newName) { - name = constPool.addUtf8Info(newName); - cachedName = newName; - } - - /** - * Returns true if this is not a constructor or a class initializer (static - * initializer). - */ - public boolean isMethod() { - String n = getName(); - return !n.equals(nameInit) && !n.equals(nameClinit); - } - - /** - * Returns a constant pool table used by this method. - */ - public ConstPool getConstPool() { - return constPool; - } - - /** - * Returns true if this is a constructor. - */ - public boolean isConstructor() { - return getName().equals(nameInit); - } - - /** - * Returns true if this is a class initializer (static initializer). - */ - public boolean isStaticInitializer() { - return getName().equals(nameClinit); - } - - /** - * Returns access flags. - * - * @see AccessFlag - */ - public int getAccessFlags() { - return accessFlags; - } - - /** - * Sets access flags. - * - * @see AccessFlag - */ - public void setAccessFlags(int acc) { - accessFlags = acc; - } - - /** - * Returns a method descriptor. - * - * @see Descriptor - */ - public String getDescriptor() { - return constPool.getUtf8Info(descriptor); - } - - /** - * Sets a method descriptor. - * - * @see Descriptor - */ - public void setDescriptor(String desc) { - if (!desc.equals(getDescriptor())) - descriptor = constPool.addUtf8Info(desc); - } - - /** - * Returns all the attributes. The returned List object - * is shared with this object. If you add a new attribute to the list, - * the attribute is also added to the method represented by this - * object. If you remove an attribute from the list, it is also removed - * from the method. - * - * @return a list of AttributeInfo objects. - * @see AttributeInfo - */ - public List getAttributes() { - if (attribute == null) - attribute = new ArrayList(); - - return attribute; - } - - /** - * Returns the attribute with the specified name. If it is not found, this - * method returns null. - * - * @param name attribute name - * @return an AttributeInfo object or null. - * @see #getAttributes() - */ - public AttributeInfo getAttribute(String name) { - return AttributeInfo.lookup(attribute, name); - } - - /** - * Appends an attribute. If there is already an attribute with the same - * name, the new one substitutes for it. - * - * @see #getAttributes() - */ - public void addAttribute(AttributeInfo info) { - if (attribute == null) - attribute = new ArrayList(); - - AttributeInfo.remove(attribute, info.getName()); - attribute.add(info); - } - - /** - * Returns an Exceptions attribute. - * - * @return an Exceptions attribute or null if it is not specified. - */ - public ExceptionsAttribute getExceptionsAttribute() { - AttributeInfo info = AttributeInfo.lookup(attribute, - ExceptionsAttribute.tag); - return (ExceptionsAttribute)info; - } - - /** - * Returns a Code attribute. - * - * @return a Code attribute or null if it is not specified. - */ - public CodeAttribute getCodeAttribute() { - AttributeInfo info = AttributeInfo.lookup(attribute, CodeAttribute.tag); - return (CodeAttribute)info; - } - - /** - * Removes an Exception attribute. - */ - public void removeExceptionsAttribute() { - AttributeInfo.remove(attribute, ExceptionsAttribute.tag); - } - - /** - * Adds an Exception attribute. - * - *

- * The added attribute must share the same constant pool table as this - * method_info structure. - */ - public void setExceptionsAttribute(ExceptionsAttribute cattr) { - removeExceptionsAttribute(); - if (attribute == null) - attribute = new ArrayList(); - - attribute.add(cattr); - } - - /** - * Removes a Code attribute. - */ - public void removeCodeAttribute() { - AttributeInfo.remove(attribute, CodeAttribute.tag); - } - - /** - * Adds a Code attribute. - * - *

- * The added attribute must share the same constant pool table as this - * method_info structure. - */ - public void setCodeAttribute(CodeAttribute cattr) { - removeCodeAttribute(); - if (attribute == null) - attribute = new ArrayList(); - - attribute.add(cattr); - } - - /** - * Rebuilds a stack map table if the class file is for Java 6 - * or later. Java 5 or older Java VMs do not recognize a stack - * map table. If doPreverify is true, this method - * also rebuilds a stack map for J2ME (CLDC). - * - * @param pool used for making type hierarchy. - * @param cf rebuild if this class file is for Java 6 or later. - * @see #rebuildStackMap(ClassPool) - * @see #rebuildStackMapForME(ClassPool) - * @see #doPreverify - * @since 3.6 - */ - public void rebuildStackMapIf6(ClassPool pool, ClassFile cf) - throws BadBytecode - { - if (cf.getMajorVersion() >= ClassFile.JAVA_6) - rebuildStackMap(pool); - - if (doPreverify) - rebuildStackMapForME(pool); - } - - /** - * Rebuilds a stack map table. If no stack map table is included, - * a new one is created. If this MethodInfo does not - * include a code attribute, nothing happens. - * - * @param pool used for making type hierarchy. - * @see StackMapTable - * @since 3.6 - */ - public void rebuildStackMap(ClassPool pool) throws BadBytecode { - CodeAttribute ca = getCodeAttribute(); - if (ca != null) { - StackMapTable smt = MapMaker.make(pool, this); - ca.setAttribute(smt); - } - } - - /** - * Rebuilds a stack map table for J2ME (CLDC). If no stack map table is included, - * a new one is created. If this MethodInfo does not - * include a code attribute, nothing happens. - * - * @param pool used for making type hierarchy. - * @see StackMap - * @since 3.12 - */ - public void rebuildStackMapForME(ClassPool pool) throws BadBytecode { - CodeAttribute ca = getCodeAttribute(); - if (ca != null) { - StackMap sm = MapMaker.make2(pool, this); - ca.setAttribute(sm); - } - } - - /** - * Returns the line number of the source line corresponding to the specified - * bytecode contained in this method. - * - * @param pos - * the position of the bytecode (>= 0). an index into the code - * array. - * @return -1 if this information is not available. - */ - public int getLineNumber(int pos) { - CodeAttribute ca = getCodeAttribute(); - if (ca == null) - return -1; - - LineNumberAttribute ainfo = (LineNumberAttribute)ca - .getAttribute(LineNumberAttribute.tag); - if (ainfo == null) - return -1; - - return ainfo.toLineNumber(pos); - } - - /** - * Changes a super constructor called by this constructor. - * - *

- * This method modifies a call to super(), which should be - * at the head of a constructor body, so that a constructor in a different - * super class is called. This method does not change actual parameters. - * Hence the new super class must have a constructor with the same signature - * as the original one. - * - *

- * This method should be called when the super class of the class declaring - * this method is changed. - * - *

- * This method does not perform anything unless this MethodInfo - * represents a constructor. - * - * @param superclass - * the new super class - */ - public void setSuperclass(String superclass) throws BadBytecode { - if (!isConstructor()) - return; - - CodeAttribute ca = getCodeAttribute(); - byte[] code = ca.getCode(); - CodeIterator iterator = ca.iterator(); - int pos = iterator.skipSuperConstructor(); - if (pos >= 0) { // not this() - ConstPool cp = constPool; - int mref = ByteArray.readU16bit(code, pos + 1); - int nt = cp.getMethodrefNameAndType(mref); - int sc = cp.addClassInfo(superclass); - int mref2 = cp.addMethodrefInfo(sc, nt); - ByteArray.write16bit(mref2, code, pos + 1); - } - } - - private void read(MethodInfo src, String methodname, Map classnames) - throws BadBytecode { - ConstPool destCp = constPool; - accessFlags = src.accessFlags; - name = destCp.addUtf8Info(methodname); - cachedName = methodname; - ConstPool srcCp = src.constPool; - String desc = srcCp.getUtf8Info(src.descriptor); - String desc2 = Descriptor.rename(desc, classnames); - descriptor = destCp.addUtf8Info(desc2); - - attribute = new ArrayList(); - ExceptionsAttribute eattr = src.getExceptionsAttribute(); - if (eattr != null) - attribute.add(eattr.copy(destCp, classnames)); - - CodeAttribute cattr = src.getCodeAttribute(); - if (cattr != null) - attribute.add(cattr.copy(destCp, classnames)); - } - - private void read(DataInputStream in) throws IOException { - accessFlags = in.readUnsignedShort(); - name = in.readUnsignedShort(); - descriptor = in.readUnsignedShort(); - int n = in.readUnsignedShort(); - attribute = new ArrayList(); - for (int i = 0; i < n; ++i) - attribute.add(AttributeInfo.read(constPool, in)); - } - - void write(DataOutputStream out) throws IOException { - out.writeShort(accessFlags); - out.writeShort(name); - out.writeShort(descriptor); - - if (attribute == null) - out.writeShort(0); - else { - out.writeShort(attribute.size()); - AttributeInfo.writeAll(attribute, out); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java deleted file mode 100644 index 67ed7f6..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java +++ /dev/null @@ -1,87 +0,0 @@ -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * MethodParameters_attribute. - */ -public class MethodParametersAttribute extends AttributeInfo { - /** - * The name of this attribute "MethodParameters". - */ - public static final String tag = "MethodParameters"; - - MethodParametersAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs an attribute. - * - * @param cp a constant pool table. - * @param names an array of parameter names. - * The i-th element is the name of the i-th parameter. - * @param flags an array of parameter access flags. - */ - public MethodParametersAttribute(ConstPool cp, String[] names, int[] flags) { - super(cp, tag); - byte[] data = new byte[names.length * 4 + 1]; - data[0] = (byte)names.length; - for (int i = 0; i < names.length; i++) { - ByteArray.write16bit(cp.addUtf8Info(names[i]), data, i * 4 + 1); - ByteArray.write16bit(flags[i], data, i * 4 + 3); - } - - set(data); - } - - /** - * Returns parameters_count, which is the number of - * parameters. - */ - public int size() { - return info[0] & 0xff; - } - - /** - * Returns the value of name_index of the i-th element of parameters. - * - * @param i the position of the parameter. - */ - public int name(int i) { - return ByteArray.readU16bit(info, i * 4 + 1); - } - - /** - * Returns the value of access_flags of the i-th element of parameters. - * - * @param i the position of the parameter. - * @see AccessFlag - */ - public int accessFlags(int i) { - return ByteArray.readU16bit(info, i * 4 + 3); - } - - /** - * Makes a copy. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames ignored. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - int s = size(); - ConstPool cp = getConstPool(); - String[] names = new String[s]; - int[] flags = new int[s]; - for (int i = 0; i < s; i++) { - names[i] = cp.getUtf8Info(name(i)); - flags[i] = accessFlags(i); - } - - return new MethodParametersAttribute(newCp, names, flags); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/Mnemonic.java b/src/com/wenshuo/agent/javassist/bytecode/Mnemonic.java deleted file mode 100644 index d5e465d..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/Mnemonic.java +++ /dev/null @@ -1,239 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * JVM Instruction Names. - * - *

This interface has been separated from javassist.bytecode.Opcode - * because typical bytecode translators do not use mnemonics. If this - * interface were merged with Opcode, extra memory would be unnecessary - * consumed. - * - * @see Opcode - */ -public interface Mnemonic { - - /** - * The instruction names (mnemonics) sorted by the opcode. - * The length of this array is 202 (jsr_w=201). - */ - String[] OPCODE = { - "nop", /* 0*/ - "aconst_null", /* 1*/ - "iconst_m1", /* 2*/ - "iconst_0", /* 3*/ - "iconst_1", /* 4*/ - "iconst_2", /* 5*/ - "iconst_3", /* 6*/ - "iconst_4", /* 7*/ - "iconst_5", /* 8*/ - "lconst_0", /* 9*/ - "lconst_1", /* 10*/ - "fconst_0", /* 11*/ - "fconst_1", /* 12*/ - "fconst_2", /* 13*/ - "dconst_0", /* 14*/ - "dconst_1", /* 15*/ - "bipush", /* 16*/ - "sipush", /* 17*/ - "ldc", /* 18*/ - "ldc_w", /* 19*/ - "ldc2_w", /* 20*/ - "iload", /* 21*/ - "lload", /* 22*/ - "fload", /* 23*/ - "dload", /* 24*/ - "aload", /* 25*/ - "iload_0", /* 26*/ - "iload_1", /* 27*/ - "iload_2", /* 28*/ - "iload_3", /* 29*/ - "lload_0", /* 30*/ - "lload_1", /* 31*/ - "lload_2", /* 32*/ - "lload_3", /* 33*/ - "fload_0", /* 34*/ - "fload_1", /* 35*/ - "fload_2", /* 36*/ - "fload_3", /* 37*/ - "dload_0", /* 38*/ - "dload_1", /* 39*/ - "dload_2", /* 40*/ - "dload_3", /* 41*/ - "aload_0", /* 42*/ - "aload_1", /* 43*/ - "aload_2", /* 44*/ - "aload_3", /* 45*/ - "iaload", /* 46*/ - "laload", /* 47*/ - "faload", /* 48*/ - "daload", /* 49*/ - "aaload", /* 50*/ - "baload", /* 51*/ - "caload", /* 52*/ - "saload", /* 53*/ - "istore", /* 54*/ - "lstore", /* 55*/ - "fstore", /* 56*/ - "dstore", /* 57*/ - "astore", /* 58*/ - "istore_0", /* 59*/ - "istore_1", /* 60*/ - "istore_2", /* 61*/ - "istore_3", /* 62*/ - "lstore_0", /* 63*/ - "lstore_1", /* 64*/ - "lstore_2", /* 65*/ - "lstore_3", /* 66*/ - "fstore_0", /* 67*/ - "fstore_1", /* 68*/ - "fstore_2", /* 69*/ - "fstore_3", /* 70*/ - "dstore_0", /* 71*/ - "dstore_1", /* 72*/ - "dstore_2", /* 73*/ - "dstore_3", /* 74*/ - "astore_0", /* 75*/ - "astore_1", /* 76*/ - "astore_2", /* 77*/ - "astore_3", /* 78*/ - "iastore", /* 79*/ - "lastore", /* 80*/ - "fastore", /* 81*/ - "dastore", /* 82*/ - "aastore", /* 83*/ - "bastore", /* 84*/ - "castore", /* 85*/ - "sastore", /* 86*/ - "pop", /* 87*/ - "pop2", /* 88*/ - "dup", /* 89*/ - "dup_x1", /* 90*/ - "dup_x2", /* 91*/ - "dup2", /* 92*/ - "dup2_x1", /* 93*/ - "dup2_x2", /* 94*/ - "swap", /* 95*/ - "iadd", /* 96*/ - "ladd", /* 97*/ - "fadd", /* 98*/ - "dadd", /* 99*/ - "isub", /* 100*/ - "lsub", /* 101*/ - "fsub", /* 102*/ - "dsub", /* 103*/ - "imul", /* 104*/ - "lmul", /* 105*/ - "fmul", /* 106*/ - "dmul", /* 107*/ - "idiv", /* 108*/ - "ldiv", /* 109*/ - "fdiv", /* 110*/ - "ddiv", /* 111*/ - "irem", /* 112*/ - "lrem", /* 113*/ - "frem", /* 114*/ - "drem", /* 115*/ - "ineg", /* 116*/ - "lneg", /* 117*/ - "fneg", /* 118*/ - "dneg", /* 119*/ - "ishl", /* 120*/ - "lshl", /* 121*/ - "ishr", /* 122*/ - "lshr", /* 123*/ - "iushr", /* 124*/ - "lushr", /* 125*/ - "iand", /* 126*/ - "land", /* 127*/ - "ior", /* 128*/ - "lor", /* 129*/ - "ixor", /* 130*/ - "lxor", /* 131*/ - "iinc", /* 132*/ - "i2l", /* 133*/ - "i2f", /* 134*/ - "i2d", /* 135*/ - "l2i", /* 136*/ - "l2f", /* 137*/ - "l2d", /* 138*/ - "f2i", /* 139*/ - "f2l", /* 140*/ - "f2d", /* 141*/ - "d2i", /* 142*/ - "d2l", /* 143*/ - "d2f", /* 144*/ - "i2b", /* 145*/ - "i2c", /* 146*/ - "i2s", /* 147*/ - "lcmp", /* 148*/ - "fcmpl", /* 149*/ - "fcmpg", /* 150*/ - "dcmpl", /* 151*/ - "dcmpg", /* 152*/ - "ifeq", /* 153*/ - "ifne", /* 154*/ - "iflt", /* 155*/ - "ifge", /* 156*/ - "ifgt", /* 157*/ - "ifle", /* 158*/ - "if_icmpeq", /* 159*/ - "if_icmpne", /* 160*/ - "if_icmplt", /* 161*/ - "if_icmpge", /* 162*/ - "if_icmpgt", /* 163*/ - "if_icmple", /* 164*/ - "if_acmpeq", /* 165*/ - "if_acmpne", /* 166*/ - "goto", /* 167*/ - "jsr", /* 168*/ - "ret", /* 169*/ - "tableswitch", /* 170*/ - "lookupswitch", /* 171*/ - "ireturn", /* 172*/ - "lreturn", /* 173*/ - "freturn", /* 174*/ - "dreturn", /* 175*/ - "areturn", /* 176*/ - "return", /* 177*/ - "getstatic", /* 178*/ - "putstatic", /* 179*/ - "getfield", /* 180*/ - "putfield", /* 181*/ - "invokevirtual", /* 182*/ - "invokespecial", /* 183*/ - "invokestatic", /* 184*/ - "invokeinterface", /* 185*/ - "invokedynamic", /* 186 */ - "new", /* 187*/ - "newarray", /* 188*/ - "anewarray", /* 189*/ - "arraylength", /* 190*/ - "athrow", /* 191*/ - "checkcast", /* 192*/ - "instanceof", /* 193*/ - "monitorenter", /* 194*/ - "monitorexit", /* 195*/ - "wide", /* 196*/ - "multianewarray", /* 197*/ - "ifnull", /* 198*/ - "ifnonnull", /* 199*/ - "goto_w", /* 200*/ - "jsr_w" /* 201*/ - }; -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/Opcode.java b/src/com/wenshuo/agent/javassist/bytecode/Opcode.java deleted file mode 100644 index 0a8ea3a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/Opcode.java +++ /dev/null @@ -1,449 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -/** - * JVM Instruction Set. - * - *

This interface defines opcodes and - * array types for the NEWARRAY instruction. - * - * @see Mnemonic - */ -public interface Opcode { - /* Opcodes */ - - int AALOAD = 50; - int AASTORE = 83; - int ACONST_NULL = 1; - int ALOAD = 25; - int ALOAD_0 = 42; - int ALOAD_1 = 43; - int ALOAD_2 = 44; - int ALOAD_3 = 45; - int ANEWARRAY = 189; - int ARETURN = 176; - int ARRAYLENGTH = 190; - int ASTORE = 58; - int ASTORE_0 = 75; - int ASTORE_1 = 76; - int ASTORE_2 = 77; - int ASTORE_3 = 78; - int ATHROW = 191; - int BALOAD = 51; - int BASTORE = 84; - int BIPUSH = 16; - int CALOAD = 52; - int CASTORE = 85; - int CHECKCAST = 192; - int D2F = 144; - int D2I = 142; - int D2L = 143; - int DADD = 99; - int DALOAD = 49; - int DASTORE = 82; - int DCMPG = 152; - int DCMPL = 151; - int DCONST_0 = 14; - int DCONST_1 = 15; - int DDIV = 111; - int DLOAD = 24; - int DLOAD_0 = 38; - int DLOAD_1 = 39; - int DLOAD_2 = 40; - int DLOAD_3 = 41; - int DMUL = 107; - int DNEG = 119; - int DREM = 115; - int DRETURN = 175; - int DSTORE = 57; - int DSTORE_0 = 71; - int DSTORE_1 = 72; - int DSTORE_2 = 73; - int DSTORE_3 = 74; - int DSUB = 103; - int DUP = 89; - int DUP2 = 92; - int DUP2_X1 = 93; - int DUP2_X2 = 94; - int DUP_X1 = 90; - int DUP_X2 = 91; - int F2D = 141; - int F2I = 139; - int F2L = 140; - int FADD = 98; - int FALOAD = 48; - int FASTORE = 81; - int FCMPG = 150; - int FCMPL = 149; - int FCONST_0 = 11; - int FCONST_1 = 12; - int FCONST_2 = 13; - int FDIV = 110; - int FLOAD = 23; - int FLOAD_0 = 34; - int FLOAD_1 = 35; - int FLOAD_2 = 36; - int FLOAD_3 = 37; - int FMUL = 106; - int FNEG = 118; - int FREM = 114; - int FRETURN = 174; - int FSTORE = 56; - int FSTORE_0 = 67; - int FSTORE_1 = 68; - int FSTORE_2 = 69; - int FSTORE_3 = 70; - int FSUB = 102; - int GETFIELD = 180; - int GETSTATIC = 178; - int GOTO = 167; - int GOTO_W = 200; - int I2B = 145; - int I2C = 146; - int I2D = 135; - int I2F = 134; - int I2L = 133; - int I2S = 147; - int IADD = 96; - int IALOAD = 46; - int IAND = 126; - int IASTORE = 79; - int ICONST_0 = 3; - int ICONST_1 = 4; - int ICONST_2 = 5; - int ICONST_3 = 6; - int ICONST_4 = 7; - int ICONST_5 = 8; - int ICONST_M1 = 2; - int IDIV = 108; - int IFEQ = 153; - int IFGE = 156; - int IFGT = 157; - int IFLE = 158; - int IFLT = 155; - int IFNE = 154; - int IFNONNULL = 199; - int IFNULL = 198; - int IF_ACMPEQ = 165; - int IF_ACMPNE = 166; - int IF_ICMPEQ = 159; - int IF_ICMPGE = 162; - int IF_ICMPGT = 163; - int IF_ICMPLE = 164; - int IF_ICMPLT = 161; - int IF_ICMPNE = 160; - int IINC = 132; - int ILOAD = 21; - int ILOAD_0 = 26; - int ILOAD_1 = 27; - int ILOAD_2 = 28; - int ILOAD_3 = 29; - int IMUL = 104; - int INEG = 116; - int INSTANCEOF = 193; - int INVOKEDYNAMIC = 186; - int INVOKEINTERFACE = 185; - int INVOKESPECIAL = 183; - int INVOKESTATIC = 184; - int INVOKEVIRTUAL = 182; - int IOR = 128; - int IREM = 112; - int IRETURN = 172; - int ISHL = 120; - int ISHR = 122; - int ISTORE = 54; - int ISTORE_0 = 59; - int ISTORE_1 = 60; - int ISTORE_2 = 61; - int ISTORE_3 = 62; - int ISUB = 100; - int IUSHR = 124; - int IXOR = 130; - int JSR = 168; - int JSR_W = 201; - int L2D = 138; - int L2F = 137; - int L2I = 136; - int LADD = 97; - int LALOAD = 47; - int LAND = 127; - int LASTORE = 80; - int LCMP = 148; - int LCONST_0 = 9; - int LCONST_1 = 10; - int LDC = 18; - int LDC2_W = 20; - int LDC_W = 19; - int LDIV = 109; - int LLOAD = 22; - int LLOAD_0 = 30; - int LLOAD_1 = 31; - int LLOAD_2 = 32; - int LLOAD_3 = 33; - int LMUL = 105; - int LNEG = 117; - int LOOKUPSWITCH = 171; - int LOR = 129; - int LREM = 113; - int LRETURN = 173; - int LSHL = 121; - int LSHR = 123; - int LSTORE = 55; - int LSTORE_0 = 63; - int LSTORE_1 = 64; - int LSTORE_2 = 65; - int LSTORE_3 = 66; - int LSUB = 101; - int LUSHR = 125; - int LXOR = 131; - int MONITORENTER = 194; - int MONITOREXIT = 195; - int MULTIANEWARRAY = 197; - int NEW = 187; - int NEWARRAY = 188; - int NOP = 0; - int POP = 87; - int POP2 = 88; - int PUTFIELD = 181; - int PUTSTATIC = 179; - int RET = 169; - int RETURN = 177; - int SALOAD = 53; - int SASTORE = 86; - int SIPUSH = 17; - int SWAP = 95; - int TABLESWITCH = 170; - int WIDE = 196; - - /* array-type code for the newarray instruction */ - - int T_BOOLEAN = 4; - int T_CHAR = 5; - int T_FLOAT = 6; - int T_DOUBLE = 7; - int T_BYTE = 8; - int T_SHORT = 9; - int T_INT = 10; - int T_LONG = 11; - - /* how many values are pushed on the operand stack. */ - int[] STACK_GROW = { - 0, // nop, 0 - 1, // aconst_null, 1 - 1, // iconst_m1, 2 - 1, // iconst_0, 3 - 1, // iconst_1, 4 - 1, // iconst_2, 5 - 1, // iconst_3, 6 - 1, // iconst_4, 7 - 1, // iconst_5, 8 - 2, // lconst_0, 9 - 2, // lconst_1, 10 - 1, // fconst_0, 11 - 1, // fconst_1, 12 - 1, // fconst_2, 13 - 2, // dconst_0, 14 - 2, // dconst_1, 15 - 1, // bipush, 16 - 1, // sipush, 17 - 1, // ldc, 18 - 1, // ldc_w, 19 - 2, // ldc2_w, 20 - 1, // iload, 21 - 2, // lload, 22 - 1, // fload, 23 - 2, // dload, 24 - 1, // aload, 25 - 1, // iload_0, 26 - 1, // iload_1, 27 - 1, // iload_2, 28 - 1, // iload_3, 29 - 2, // lload_0, 30 - 2, // lload_1, 31 - 2, // lload_2, 32 - 2, // lload_3, 33 - 1, // fload_0, 34 - 1, // fload_1, 35 - 1, // fload_2, 36 - 1, // fload_3, 37 - 2, // dload_0, 38 - 2, // dload_1, 39 - 2, // dload_2, 40 - 2, // dload_3, 41 - 1, // aload_0, 42 - 1, // aload_1, 43 - 1, // aload_2, 44 - 1, // aload_3, 45 - -1, // iaload, 46 - 0, // laload, 47 - -1, // faload, 48 - 0, // daload, 49 - -1, // aaload, 50 - -1, // baload, 51 - -1, // caload, 52 - -1, // saload, 53 - -1, // istore, 54 - -2, // lstore, 55 - -1, // fstore, 56 - -2, // dstore, 57 - -1, // astore, 58 - -1, // istore_0, 59 - -1, // istore_1, 60 - -1, // istore_2, 61 - -1, // istore_3, 62 - -2, // lstore_0, 63 - -2, // lstore_1, 64 - -2, // lstore_2, 65 - -2, // lstore_3, 66 - -1, // fstore_0, 67 - -1, // fstore_1, 68 - -1, // fstore_2, 69 - -1, // fstore_3, 70 - -2, // dstore_0, 71 - -2, // dstore_1, 72 - -2, // dstore_2, 73 - -2, // dstore_3, 74 - -1, // astore_0, 75 - -1, // astore_1, 76 - -1, // astore_2, 77 - -1, // astore_3, 78 - -3, // iastore, 79 - -4, // lastore, 80 - -3, // fastore, 81 - -4, // dastore, 82 - -3, // aastore, 83 - -3, // bastore, 84 - -3, // castore, 85 - -3, // sastore, 86 - -1, // pop, 87 - -2, // pop2, 88 - 1, // dup, 89 - 1, // dup_x1, 90 - 1, // dup_x2, 91 - 2, // dup2, 92 - 2, // dup2_x1, 93 - 2, // dup2_x2, 94 - 0, // swap, 95 - -1, // iadd, 96 - -2, // ladd, 97 - -1, // fadd, 98 - -2, // dadd, 99 - -1, // isub, 100 - -2, // lsub, 101 - -1, // fsub, 102 - -2, // dsub, 103 - -1, // imul, 104 - -2, // lmul, 105 - -1, // fmul, 106 - -2, // dmul, 107 - -1, // idiv, 108 - -2, // ldiv, 109 - -1, // fdiv, 110 - -2, // ddiv, 111 - -1, // irem, 112 - -2, // lrem, 113 - -1, // frem, 114 - -2, // drem, 115 - 0, // ineg, 116 - 0, // lneg, 117 - 0, // fneg, 118 - 0, // dneg, 119 - -1, // ishl, 120 - -1, // lshl, 121 - -1, // ishr, 122 - -1, // lshr, 123 - -1, // iushr, 124 - -1, // lushr, 125 - -1, // iand, 126 - -2, // land, 127 - -1, // ior, 128 - -2, // lor, 129 - -1, // ixor, 130 - -2, // lxor, 131 - 0, // iinc, 132 - 1, // i2l, 133 - 0, // i2f, 134 - 1, // i2d, 135 - -1, // l2i, 136 - -1, // l2f, 137 - 0, // l2d, 138 - 0, // f2i, 139 - 1, // f2l, 140 - 1, // f2d, 141 - -1, // d2i, 142 - 0, // d2l, 143 - -1, // d2f, 144 - 0, // i2b, 145 - 0, // i2c, 146 - 0, // i2s, 147 - -3, // lcmp, 148 - -1, // fcmpl, 149 - -1, // fcmpg, 150 - -3, // dcmpl, 151 - -3, // dcmpg, 152 - -1, // ifeq, 153 - -1, // ifne, 154 - -1, // iflt, 155 - -1, // ifge, 156 - -1, // ifgt, 157 - -1, // ifle, 158 - -2, // if_icmpeq, 159 - -2, // if_icmpne, 160 - -2, // if_icmplt, 161 - -2, // if_icmpge, 162 - -2, // if_icmpgt, 163 - -2, // if_icmple, 164 - -2, // if_acmpeq, 165 - -2, // if_acmpne, 166 - 0, // goto, 167 - 1, // jsr, 168 - 0, // ret, 169 - -1, // tableswitch, 170 - -1, // lookupswitch, 171 - -1, // ireturn, 172 - -2, // lreturn, 173 - -1, // freturn, 174 - -2, // dreturn, 175 - -1, // areturn, 176 - 0, // return, 177 - 0, // getstatic, 178 depends on the type - 0, // putstatic, 179 depends on the type - 0, // getfield, 180 depends on the type - 0, // putfield, 181 depends on the type - 0, // invokevirtual, 182 depends on the type - 0, // invokespecial, 183 depends on the type - 0, // invokestatic, 184 depends on the type - 0, // invokeinterface, 185 depends on the type - 0, // invokedynaimc, 186 depends on the type - 1, // new, 187 - 0, // newarray, 188 - 0, // anewarray, 189 - 0, // arraylength, 190 - -1, // athrow, 191 stack is cleared - 0, // checkcast, 192 - 0, // instanceof, 193 - -1, // monitorenter, 194 - -1, // monitorexit, 195 - 0, // wide, 196 depends on the following opcode - 0, // multianewarray, 197 depends on the dimensions - -1, // ifnull, 198 - -1, // ifnonnull, 199 - 0, // goto_w, 200 - 1 // jsr_w, 201 - }; -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java deleted file mode 100644 index cdefada..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java +++ /dev/null @@ -1,215 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.util.HashMap; -import java.util.Map; -import java.io.IOException; -import java.io.DataInputStream; -import java.io.ByteArrayOutputStream; - -import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Copier; -import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Parser; -import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Renamer; -import com.wenshuo.agent.javassist.bytecode.annotation.*; - -/** - * A class representing RuntimeVisibleAnnotations_attribute and - * RuntimeInvisibleAnnotations_attribute. - * - *

To obtain an ParameterAnnotationAttribute object, invoke - * getAttribute(ParameterAnnotationsAttribute.invisibleTag) - * in MethodInfo. - * The obtained attribute is a - * runtime invisible annotations attribute. - * If the parameter is - * ParameterAnnotationAttribute.visibleTag, then the obtained - * attribute is a runtime visible one. - */ -public class ParameterAnnotationsAttribute extends AttributeInfo { - /** - * The name of the RuntimeVisibleParameterAnnotations - * attribute. - */ - public static final String visibleTag - = "RuntimeVisibleParameterAnnotations"; - - /** - * The name of the RuntimeInvisibleParameterAnnotations - * attribute. - */ - public static final String invisibleTag - = "RuntimeInvisibleParameterAnnotations"; - /** - * Constructs - * a Runtime(In)VisibleParameterAnnotations_attribute. - * - * @param cp constant pool - * @param attrname attribute name (visibleTag or - * invisibleTag). - * @param info the contents of this attribute. It does not - * include attribute_name_index or - * attribute_length. - */ - public ParameterAnnotationsAttribute(ConstPool cp, String attrname, - byte[] info) { - super(cp, attrname, info); - } - - /** - * Constructs an empty - * Runtime(In)VisibleParameterAnnotations_attribute. - * A new annotation can be later added to the created attribute - * by setAnnotations(). - * - * @param cp constant pool - * @param attrname attribute name (visibleTag or - * invisibleTag). - * @see #setAnnotations(Annotation[][]) - */ - public ParameterAnnotationsAttribute(ConstPool cp, String attrname) { - this(cp, attrname, new byte[] { 0 }); - } - - /** - * @param n the attribute name. - */ - ParameterAnnotationsAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Returns num_parameters. - */ - public int numParameters() { - return info[0] & 0xff; - } - - /** - * Copies this attribute and returns a new copy. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - Copier copier = new Copier(info, constPool, newCp, classnames); - try { - copier.parameters(); - return new ParameterAnnotationsAttribute(newCp, getName(), - copier.close()); - } - catch (Exception e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Parses the annotations and returns a data structure representing - * that parsed annotations. Note that changes of the node values of the - * returned tree are not reflected on the annotations represented by - * this object unless the tree is copied back to this object by - * setAnnotations(). - * - * @return Each element of the returned array represents an array of - * annotations that are associated with each method parameter. - * - * @see #setAnnotations(Annotation[][]) - */ - public Annotation[][] getAnnotations() { - try { - return new Parser(info, constPool).parseParameters(); - } - catch (Exception e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Changes the annotations represented by this object according to - * the given array of Annotation objects. - * - * @param params the data structure representing the - * new annotations. Every element of this array - * is an array of Annotation and - * it represens annotations of each method parameter. - */ - public void setAnnotations(Annotation[][] params) { - ByteArrayOutputStream output = new ByteArrayOutputStream(); - AnnotationsWriter writer = new AnnotationsWriter(output, constPool); - try { - int n = params.length; - writer.numParameters(n); - for (int i = 0; i < n; ++i) { - Annotation[] anno = params[i]; - writer.numAnnotations(anno.length); - for (int j = 0; j < anno.length; ++j) - anno[j].write(writer); - } - - writer.close(); - } - catch (IOException e) { - throw new RuntimeException(e); // should never reach here. - } - - set(output.toByteArray()); - } - - /** - * @param oldname a JVM class name. - * @param newname a JVM class name. - */ - void renameClass(String oldname, String newname) { - HashMap map = new HashMap(); - map.put(oldname, newname); - renameClass(map); - } - - void renameClass(Map classnames) { - Renamer renamer = new Renamer(info, getConstPool(), classnames); - try { - renamer.parameters(); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - - void getRefClasses(Map classnames) { renameClass(classnames); } - - /** - * Returns a string representation of this object. - */ - public String toString() { - Annotation[][] aa = getAnnotations(); - StringBuilder sbuf = new StringBuilder(); - int k = 0; - while (k < aa.length) { - Annotation[] a = aa[k++]; - int i = 0; - while (i < a.length) { - sbuf.append(a[i++].toString()); - if (i != a.length) - sbuf.append(" "); - } - - if (k != aa.length) - sbuf.append(", "); - } - - return sbuf.toString(); - - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java deleted file mode 100644 index f560505..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java +++ /dev/null @@ -1,1160 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; -import java.util.ArrayList; -import com.wenshuo.agent.javassist.CtClass; - -/** - * Signature_attribute. - */ -public class SignatureAttribute extends AttributeInfo { - /** - * The name of this attribute "Signature". - */ - public static final String tag = "Signature"; - - SignatureAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a Signature attribute. - * - * @param cp a constant pool table. - * @param signature the signature represented by this attribute. - */ - public SignatureAttribute(ConstPool cp, String signature) { - super(cp, tag); - int index = cp.addUtf8Info(signature); - byte[] bvalue = new byte[2]; - bvalue[0] = (byte)(index >>> 8); - bvalue[1] = (byte)index; - set(bvalue); - } - - /** - * Returns the generic signature indicated by signature_index. - * - * @see #toClassSignature(String) - * @see #toMethodSignature(String) - * @see #toFieldSignature(String) - */ - public String getSignature() { - return getConstPool().getUtf8Info(ByteArray.readU16bit(get(), 0)); - } - - /** - * Sets signature_index to the index of the given generic signature, - * which is added to a constant pool. - * - * @param sig new signature. - * @since 3.11 - */ - public void setSignature(String sig) { - int index = getConstPool().addUtf8Info(sig); - ByteArray.write16bit(index, info, 0); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - return new SignatureAttribute(newCp, getSignature()); - } - - void renameClass(String oldname, String newname) { - String sig = renameClass(getSignature(), oldname, newname); - setSignature(sig); - } - - void renameClass(Map classnames) { - String sig = renameClass(getSignature(), classnames); - setSignature(sig); - } - - static String renameClass(String desc, String oldname, String newname) { - Map map = new java.util.HashMap(); - map.put(oldname, newname); - return renameClass(desc, map); - } - - static String renameClass(String desc, Map map) { - if (map == null) - return desc; - - StringBuilder newdesc = new StringBuilder(); - int head = 0; - int i = 0; - for (;;) { - int j = desc.indexOf('L', i); - if (j < 0) - break; - - StringBuilder nameBuf = new StringBuilder(); - int k = j; - char c; - try { - while ((c = desc.charAt(++k)) != ';') { - nameBuf.append(c); - if (c == '<') { - while ((c = desc.charAt(++k)) != '>') - nameBuf.append(c); - - nameBuf.append(c); - } - } - } - catch (IndexOutOfBoundsException e) { break; } - i = k + 1; - String name = nameBuf.toString(); - String name2 = (String)map.get(name); - if (name2 != null) { - newdesc.append(desc.substring(head, j)); - newdesc.append('L'); - newdesc.append(name2); - newdesc.append(c); - head = i; - } - } - - if (head == 0) - return desc; - else { - int len = desc.length(); - if (head < len) - newdesc.append(desc.substring(head, len)); - - return newdesc.toString(); - } - } - - private static boolean isNamePart(int c) { - return c != ';' && c != '<'; - } - - static private class Cursor { - int position = 0; - - int indexOf(String s, int ch) throws BadBytecode { - int i = s.indexOf(ch, position); - if (i < 0) - throw error(s); - else { - position = i + 1; - return i; - } - } - } - - /** - * Class signature. - */ - public static class ClassSignature { - TypeParameter[] params; - ClassType superClass; - ClassType[] interfaces; - - /** - * Constructs a class signature. - * - * @param params type parameters. - * @param superClass the super class. - * @param interfaces the interface types. - */ - public ClassSignature(TypeParameter[] params, ClassType superClass, ClassType[] interfaces) { - this.params = params == null ? new TypeParameter[0] : params; - this.superClass = superClass == null ? ClassType.OBJECT : superClass; - this.interfaces = interfaces == null ? new ClassType[0] : interfaces; - } - - /** - * Constructs a class signature. - * - * @param p type parameters. - */ - public ClassSignature(TypeParameter[] p) { - this(p, null, null); - } - - /** - * Returns the type parameters. - * - * @return a zero-length array if the type parameters are not specified. - */ - public TypeParameter[] getParameters() { - return params; - } - - /** - * Returns the super class. - */ - public ClassType getSuperClass() { return superClass; } - - /** - * Returns the super interfaces. - * - * @return a zero-length array if the super interfaces are not specified. - */ - public ClassType[] getInterfaces() { return interfaces; } - - /** - * Returns the string representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(); - - TypeParameter.toString(sbuf, params); - sbuf.append(" extends ").append(superClass); - if (interfaces.length > 0) { - sbuf.append(" implements "); - Type.toString(sbuf, interfaces); - } - - return sbuf.toString(); - } - - /** - * Returns the encoded string representing the method type signature. - */ - public String encode() { - StringBuffer sbuf = new StringBuffer(); - if (params.length > 0) { - sbuf.append('<'); - for (int i = 0; i < params.length; i++) - params[i].encode(sbuf); - - sbuf.append('>'); - } - - superClass.encode(sbuf); - for (int i = 0; i < interfaces.length; i++) - interfaces[i].encode(sbuf); - - return sbuf.toString(); - } - } - - /** - * Method type signature. - */ - public static class MethodSignature { - TypeParameter[] typeParams; - Type[] params; - Type retType; - ObjectType[] exceptions; - - /** - * Constructs a method type signature. Any parameter can be null - * to represent void or nothing. - * - * @param tp type parameters. - * @param params parameter types. - * @param ret a return type, or null if the return type is void. - * @param ex exception types. - */ - public MethodSignature(TypeParameter[] tp, Type[] params, Type ret, ObjectType[] ex) { - typeParams = tp == null ? new TypeParameter[0] : tp; - this.params = params == null ? new Type[0] : params; - retType = ret == null ? new BaseType("void") : ret; - exceptions = ex == null ? new ObjectType[0] : ex; - } - - /** - * Returns the formal type parameters. - * - * @return a zero-length array if the type parameters are not specified. - */ - public TypeParameter[] getTypeParameters() { return typeParams; } - - /** - * Returns the types of the formal parameters. - * - * @return a zero-length array if no formal parameter is taken. - */ - public Type[] getParameterTypes() { return params; } - - /** - * Returns the type of the returned value. - */ - public Type getReturnType() { return retType; } - - /** - * Returns the types of the exceptions that may be thrown. - * - * @return a zero-length array if exceptions are never thrown or - * the exception types are not parameterized types or type variables. - */ - public ObjectType[] getExceptionTypes() { return exceptions; } - - /** - * Returns the string representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(); - - TypeParameter.toString(sbuf, typeParams); - sbuf.append(" ("); - Type.toString(sbuf, params); - sbuf.append(") "); - sbuf.append(retType); - if (exceptions.length > 0) { - sbuf.append(" throws "); - Type.toString(sbuf, exceptions); - } - - return sbuf.toString(); - } - - /** - * Returns the encoded string representing the method type signature. - */ - public String encode() { - StringBuffer sbuf = new StringBuffer(); - if (typeParams.length > 0) { - sbuf.append('<'); - for (int i = 0; i < typeParams.length; i++) - typeParams[i].encode(sbuf); - - sbuf.append('>'); - } - - sbuf.append('('); - for (int i = 0; i < params.length; i++) - params[i].encode(sbuf); - - sbuf.append(')'); - retType.encode(sbuf); - if (exceptions.length > 0) - for (int i = 0; i < exceptions.length; i++) { - sbuf.append('^'); - exceptions[i].encode(sbuf); - } - - return sbuf.toString(); - } - } - - /** - * Formal type parameters. - * - * @see TypeArgument - */ - public static class TypeParameter { - String name; - ObjectType superClass; - ObjectType[] superInterfaces; - - TypeParameter(String sig, int nb, int ne, ObjectType sc, ObjectType[] si) { - name = sig.substring(nb, ne); - superClass = sc; - superInterfaces = si; - } - - /** - * Constructs a TypeParameter representing a type parametre - * like <T extends ... >. - * - * @param name parameter name. - * @param superClass an upper bound class-type (or null). - * @param superInterfaces an upper bound interface-type (or null). - */ - public TypeParameter(String name, ObjectType superClass, ObjectType[] superInterfaces) { - this.name = name; - this.superClass = superClass; - if (superInterfaces == null) - this.superInterfaces = new ObjectType[0]; - else - this.superInterfaces = superInterfaces; - } - - /** - * Constructs a TypeParameter representing a type parameter - * like <T>. - * - * @param name parameter name. - */ - public TypeParameter(String name) { - this(name, null, null); - } - - /** - * Returns the name of the type parameter. - */ - public String getName() { - return name; - } - - /** - * Returns the class bound of this parameter. - */ - public ObjectType getClassBound() { return superClass; } - - /** - * Returns the interface bound of this parameter. - * - * @return a zero-length array if the interface bound is not specified. - */ - public ObjectType[] getInterfaceBound() { return superInterfaces; } - - /** - * Returns the string representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(getName()); - if (superClass != null) - sbuf.append(" extends ").append(superClass.toString()); - - int len = superInterfaces.length; - if (len > 0) { - for (int i = 0; i < len; i++) { - if (i > 0 || superClass != null) - sbuf.append(" & "); - else - sbuf.append(" extends "); - - sbuf.append(superInterfaces[i].toString()); - } - } - - return sbuf.toString(); - } - - static void toString(StringBuffer sbuf, TypeParameter[] tp) { - sbuf.append('<'); - for (int i = 0; i < tp.length; i++) { - if (i > 0) - sbuf.append(", "); - - sbuf.append(tp[i]); - } - - sbuf.append('>'); - } - - void encode(StringBuffer sb) { - sb.append(name); - if (superClass == null) - sb.append(":Ljava/lang/Object;"); - else { - sb.append(':'); - superClass.encode(sb); - } - - for (int i = 0; i < superInterfaces.length; i++) { - sb.append(':'); - superInterfaces[i].encode(sb); - } - } - } - - /** - * Type argument. - * - * @see TypeParameter - */ - public static class TypeArgument { - ObjectType arg; - char wildcard; - - TypeArgument(ObjectType a, char w) { - arg = a; - wildcard = w; - } - - /** - * Constructs a TypeArgument. - * A type argument is <String>, <int[]>, - * or a type variable <T>, etc. - * - * @param t a class type, an array type, or a type variable. - */ - public TypeArgument(ObjectType t) { - this(t, ' '); - } - - /** - * Constructs a TypeArgument representing <?>. - */ - public TypeArgument() { - this(null, '*'); - } - - /** - * A factory method constructing a TypeArgument with an upper bound. - * It represents <? extends ... > - * - * @param t an upper bound type. - */ - public static TypeArgument subclassOf(ObjectType t) { - return new TypeArgument(t, '+'); - } - - /** - * A factory method constructing a TypeArgument with an lower bound. - * It represents <? super ... > - * - * @param t an lower bbound type. - */ - public static TypeArgument superOf(ObjectType t) { - return new TypeArgument(t, '-'); - } - - /** - * Returns the kind of this type argument. - * - * @return ' ' (not-wildcard), '*' (wildcard), '+' (wildcard with - * upper bound), or '-' (wildcard with lower bound). - */ - public char getKind() { return wildcard; } - - /** - * Returns true if this type argument is a wildcard type - * such as ?, ? extends String, or ? super Integer. - */ - public boolean isWildcard() { return wildcard != ' '; } - - /** - * Returns the type represented by this argument - * if the argument is not a wildcard type. Otherwise, this method - * returns the upper bound (if the kind is '+'), - * the lower bound (if the kind is '-'), or null (if the upper or lower - * bound is not specified). - */ - public ObjectType getType() { return arg; } - - /** - * Returns the string representation. - */ - public String toString() { - if (wildcard == '*') - return "?"; - - String type = arg.toString(); - if (wildcard == ' ') - return type; - else if (wildcard == '+') - return "? extends " + type; - else - return "? super " + type; - } - - static void encode(StringBuffer sb, TypeArgument[] args) { - sb.append('<'); - for (int i = 0; i < args.length; i++) { - TypeArgument ta = args[i]; - if (ta.isWildcard()) - sb.append(ta.wildcard); - - if (ta.getType() != null) - ta.getType().encode(sb); - } - - sb.append('>'); - } - } - - /** - * Primitive types and object types. - */ - public static abstract class Type { - abstract void encode(StringBuffer sb); - static void toString(StringBuffer sbuf, Type[] ts) { - for (int i = 0; i < ts.length; i++) { - if (i > 0) - sbuf.append(", "); - - sbuf.append(ts[i]); - } - } - - /** - * Returns the type name in the JVM internal style. - * For example, if the type is a nested class {@code foo.Bar.Baz}, - * then {@code foo.Bar$Baz} is returned. - */ - public String jvmTypeName() { return toString(); } - } - - /** - * Primitive types. - */ - public static class BaseType extends Type { - char descriptor; - BaseType(char c) { descriptor = c; } - - /** - * Constructs a BaseType. - * - * @param typeName void, int, ... - */ - public BaseType(String typeName) { - this(Descriptor.of(typeName).charAt(0)); - } - - /** - * Returns the descriptor representing this primitive type. - * - * @see javassist.bytecode.Descriptor - */ - public char getDescriptor() { return descriptor; } - - /** - * Returns the CtClass representing this - * primitive type. - */ - public CtClass getCtlass() { - return Descriptor.toPrimitiveClass(descriptor); - } - - /** - * Returns the string representation. - */ - public String toString() { - return Descriptor.toClassName(Character.toString(descriptor)); - } - - void encode(StringBuffer sb) { - sb.append(descriptor); - } - } - - /** - * Class types, array types, and type variables. - * This class is also used for representing a field type. - */ - public static abstract class ObjectType extends Type { - /** - * Returns the encoded string representing the object type signature. - */ - public String encode() { - StringBuffer sb = new StringBuffer(); - encode(sb); - return sb.toString(); - } - } - - /** - * Class types. - */ - public static class ClassType extends ObjectType { - String name; - TypeArgument[] arguments; - - static ClassType make(String s, int b, int e, - TypeArgument[] targs, ClassType parent) { - if (parent == null) - return new ClassType(s, b, e, targs); - else - return new NestedClassType(s, b, e, targs, parent); - } - - ClassType(String signature, int begin, int end, TypeArgument[] targs) { - name = signature.substring(begin, end).replace('/', '.'); - arguments = targs; - } - - /** - * A class type representing java.lang.Object. - */ - public static ClassType OBJECT = new ClassType("java.lang.Object", null); - - /** - * Constructs a ClassType. It represents - * the name of a non-nested class. - * - * @param className a fully qualified class name. - * @param args type arguments or null. - */ - public ClassType(String className, TypeArgument[] args) { - name = className; - arguments = args; - } - - /** - * Constructs a ClassType. It represents - * the name of a non-nested class. - * - * @param className a fully qualified class name. - */ - public ClassType(String className) { - this(className, null); - } - - /** - * Returns the class name. - */ - public String getName() { - return name; - } - - /** - * Returns the type arguments. - * - * @return null if no type arguments are given to this class. - */ - public TypeArgument[] getTypeArguments() { return arguments; } - - /** - * If this class is a member of another class, returns the - * class in which this class is declared. - * - * @return null if this class is not a member of another class. - */ - public ClassType getDeclaringClass() { return null; } - - /** - * Returns the string representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(); - ClassType parent = getDeclaringClass(); - if (parent != null) - sbuf.append(parent.toString()).append('.'); - - return toString2(sbuf); - } - - private String toString2(StringBuffer sbuf) { - sbuf.append(name); - if (arguments != null) { - sbuf.append('<'); - int n = arguments.length; - for (int i = 0; i < n; i++) { - if (i > 0) - sbuf.append(", "); - - sbuf.append(arguments[i].toString()); - } - - sbuf.append('>'); - } - - return sbuf.toString(); - } - - /** - * Returns the type name in the JVM internal style. - * For example, if the type is a nested class {@code foo.Bar.Baz}, - * then {@code foo.Bar$Baz} is returned. - */ - public String jvmTypeName() { - StringBuffer sbuf = new StringBuffer(); - ClassType parent = getDeclaringClass(); - if (parent != null) - sbuf.append(parent.jvmTypeName()).append('$'); - - return toString2(sbuf); - } - - void encode(StringBuffer sb) { - sb.append('L'); - encode2(sb); - sb.append(';'); - } - - void encode2(StringBuffer sb) { - ClassType parent = getDeclaringClass(); - if (parent != null) { - parent.encode2(sb); - sb.append('$'); - } - - sb.append(name.replace('.', '/')); - if (arguments != null) - TypeArgument.encode(sb, arguments); - } - } - - /** - * Nested class types. - */ - public static class NestedClassType extends ClassType { - ClassType parent; - NestedClassType(String s, int b, int e, - TypeArgument[] targs, ClassType p) { - super(s, b, e, targs); - parent = p; - } - - /** - * Constructs a NestedClassType. - * - * @param parent the class surrounding this class type. - * @param className a simple class name. It does not include - * a package name or a parent's class name. - * @param args type parameters or null. - */ - public NestedClassType(ClassType parent, String className, TypeArgument[] args) { - super(className, args); - this.parent = parent; - } - - /** - * Returns the class that declares this nested class. - * This nested class is a member of that declaring class. - */ - public ClassType getDeclaringClass() { return parent; } - } - - /** - * Array types. - */ - public static class ArrayType extends ObjectType { - int dim; - Type componentType; - - /** - * Constructs an ArrayType. - * - * @param d dimension. - * @param comp the component type. - */ - public ArrayType(int d, Type comp) { - dim = d; - componentType = comp; - } - - /** - * Returns the dimension of the array. - */ - public int getDimension() { return dim; } - - /** - * Returns the component type. - */ - public Type getComponentType() { - return componentType; - } - - /** - * Returns the string representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(componentType.toString()); - for (int i = 0; i < dim; i++) - sbuf.append("[]"); - - return sbuf.toString(); - } - - void encode(StringBuffer sb) { - for (int i = 0; i < dim; i++) - sb.append('['); - - componentType.encode(sb); - } - } - - /** - * Type variables. - */ - public static class TypeVariable extends ObjectType { - String name; - - TypeVariable(String sig, int begin, int end) { - name = sig.substring(begin, end); - } - - /** - * Constructs a TypeVariable. - * - * @param name the name of a type variable. - */ - public TypeVariable(String name) { - this.name = name; - } - - /** - * Returns the variable name. - */ - public String getName() { - return name; - } - - /** - * Returns the string representation. - */ - public String toString() { - return name; - } - - void encode(StringBuffer sb) { - sb.append('T').append(name).append(';'); - } - } - - /** - * Parses the given signature string as a class signature. - * - * @param sig the signature obtained from the SignatureAttribute - * of a ClassFile. - * @return a tree-like data structure representing a class signature. It provides - * convenient accessor methods. - * @throws BadBytecode thrown when a syntactical error is found. - * @see #getSignature() - * @since 3.5 - */ - public static ClassSignature toClassSignature(String sig) throws BadBytecode { - try { - return parseSig(sig); - } - catch (IndexOutOfBoundsException e) { - throw error(sig); - } - } - - /** - * Parses the given signature string as a method type signature. - * - * @param sig the signature obtained from the SignatureAttribute - * of a MethodInfo. - * @return @return a tree-like data structure representing a method signature. It provides - * convenient accessor methods. - * @throws BadBytecode thrown when a syntactical error is found. - * @see #getSignature() - * @since 3.5 - */ - public static MethodSignature toMethodSignature(String sig) throws BadBytecode { - try { - return parseMethodSig(sig); - } - catch (IndexOutOfBoundsException e) { - throw error(sig); - } - } - - /** - * Parses the given signature string as a field type signature. - * - * @param sig the signature string obtained from the SignatureAttribute - * of a FieldInfo. - * @return the field type signature. - * @throws BadBytecode thrown when a syntactical error is found. - * @see #getSignature() - * @since 3.5 - */ - public static ObjectType toFieldSignature(String sig) throws BadBytecode { - try { - return parseObjectType(sig, new Cursor(), false); - } - catch (IndexOutOfBoundsException e) { - throw error(sig); - } - } - - /** - * Parses the given signature string as a type signature. - * The type signature is either the field type signature or a base type - * descriptor including void type. - * - * @throws BadBytecode thrown when a syntactical error is found. - * @since 3.18 - */ - public static Type toTypeSignature(String sig) throws BadBytecode { - try { - return parseType(sig, new Cursor()); - } - catch (IndexOutOfBoundsException e) { - throw error(sig); - } - } - - private static ClassSignature parseSig(String sig) - throws BadBytecode, IndexOutOfBoundsException - { - Cursor cur = new Cursor(); - TypeParameter[] tp = parseTypeParams(sig, cur); - ClassType superClass = parseClassType(sig, cur); - int sigLen = sig.length(); - ArrayList ifArray = new ArrayList(); - while (cur.position < sigLen && sig.charAt(cur.position) == 'L') - ifArray.add(parseClassType(sig, cur)); - - ClassType[] ifs - = (ClassType[])ifArray.toArray(new ClassType[ifArray.size()]); - return new ClassSignature(tp, superClass, ifs); - } - - private static MethodSignature parseMethodSig(String sig) - throws BadBytecode - { - Cursor cur = new Cursor(); - TypeParameter[] tp = parseTypeParams(sig, cur); - if (sig.charAt(cur.position++) != '(') - throw error(sig); - - ArrayList params = new ArrayList(); - while (sig.charAt(cur.position) != ')') { - Type t = parseType(sig, cur); - params.add(t); - } - - cur.position++; - Type ret = parseType(sig, cur); - int sigLen = sig.length(); - ArrayList exceptions = new ArrayList(); - while (cur.position < sigLen && sig.charAt(cur.position) == '^') { - cur.position++; - ObjectType t = parseObjectType(sig, cur, false); - if (t instanceof ArrayType) - throw error(sig); - - exceptions.add(t); - } - - Type[] p = (Type[])params.toArray(new Type[params.size()]); - ObjectType[] ex = (ObjectType[])exceptions.toArray(new ObjectType[exceptions.size()]); - return new MethodSignature(tp, p, ret, ex); - } - - private static TypeParameter[] parseTypeParams(String sig, Cursor cur) - throws BadBytecode - { - ArrayList typeParam = new ArrayList(); - if (sig.charAt(cur.position) == '<') { - cur.position++; - while (sig.charAt(cur.position) != '>') { - int nameBegin = cur.position; - int nameEnd = cur.indexOf(sig, ':'); - ObjectType classBound = parseObjectType(sig, cur, true); - ArrayList ifBound = new ArrayList(); - while (sig.charAt(cur.position) == ':') { - cur.position++; - ObjectType t = parseObjectType(sig, cur, false); - ifBound.add(t); - } - - TypeParameter p = new TypeParameter(sig, nameBegin, nameEnd, - classBound, (ObjectType[])ifBound.toArray(new ObjectType[ifBound.size()])); - typeParam.add(p); - } - - cur.position++; - } - - return (TypeParameter[])typeParam.toArray(new TypeParameter[typeParam.size()]); - } - - private static ObjectType parseObjectType(String sig, Cursor c, boolean dontThrow) - throws BadBytecode - { - int i; - int begin = c.position; - switch (sig.charAt(begin)) { - case 'L' : - return parseClassType2(sig, c, null); - case 'T' : - i = c.indexOf(sig, ';'); - return new TypeVariable(sig, begin + 1, i); - case '[' : - return parseArray(sig, c); - default : - if (dontThrow) - return null; - else - throw error(sig); - } - } - - private static ClassType parseClassType(String sig, Cursor c) - throws BadBytecode - { - if (sig.charAt(c.position) == 'L') - return parseClassType2(sig, c, null); - else - throw error(sig); - } - - private static ClassType parseClassType2(String sig, Cursor c, ClassType parent) - throws BadBytecode - { - int start = ++c.position; - char t; - do { - t = sig.charAt(c.position++); - } while (t != '$' && t != '<' && t != ';'); - int end = c.position - 1; - TypeArgument[] targs; - if (t == '<') { - targs = parseTypeArgs(sig, c); - t = sig.charAt(c.position++); - } - else - targs = null; - - ClassType thisClass = ClassType.make(sig, start, end, targs, parent); - if (t == '$' || t == '.') { - c.position--; - return parseClassType2(sig, c, thisClass); - } - else - return thisClass; - } - - private static TypeArgument[] parseTypeArgs(String sig, Cursor c) throws BadBytecode { - ArrayList args = new ArrayList(); - char t; - while ((t = sig.charAt(c.position++)) != '>') { - TypeArgument ta; - if (t == '*' ) - ta = new TypeArgument(null, '*'); - else { - if (t != '+' && t != '-') { - t = ' '; - c.position--; - } - - ta = new TypeArgument(parseObjectType(sig, c, false), t); - } - - args.add(ta); - } - - return (TypeArgument[])args.toArray(new TypeArgument[args.size()]); - } - - private static ObjectType parseArray(String sig, Cursor c) throws BadBytecode { - int dim = 1; - while (sig.charAt(++c.position) == '[') - dim++; - - return new ArrayType(dim, parseType(sig, c)); - } - - private static Type parseType(String sig, Cursor c) throws BadBytecode { - Type t = parseObjectType(sig, c, true); - if (t == null) - t = new BaseType(sig.charAt(c.position++)); - - return t; - } - - private static BadBytecode error(String sig) { - return new BadBytecode("bad signature: " + sig); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java deleted file mode 100644 index 3f16225..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java +++ /dev/null @@ -1,71 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * SourceFile_attribute. - */ -public class SourceFileAttribute extends AttributeInfo { - /** - * The name of this attribute "SourceFile". - */ - public static final String tag = "SourceFile"; - - SourceFileAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a SourceFile attribute. - * - * @param cp a constant pool table. - * @param filename the name of the source file. - */ - public SourceFileAttribute(ConstPool cp, String filename) { - super(cp, tag); - int index = cp.addUtf8Info(filename); - byte[] bvalue = new byte[2]; - bvalue[0] = (byte)(index >>> 8); - bvalue[1] = (byte)index; - set(bvalue); - } - - /** - * Returns the file name indicated by sourcefile_index. - */ - public String getFileName() { - return getConstPool().getUtf8Info(ByteArray.readU16bit(get(), 0)); - } - - /** - * Makes a copy. Class names are replaced according to the - * given Map object. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames pairs of replaced and substituted - * class names. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - return new SourceFileAttribute(newCp, getFileName()); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/StackMap.java b/src/com/wenshuo/agent/javassist/bytecode/StackMap.java deleted file mode 100644 index 541d6cd..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/StackMap.java +++ /dev/null @@ -1,576 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.ByteArrayOutputStream; -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.bytecode.StackMapTable.InsertLocal; -import com.wenshuo.agent.javassist.bytecode.StackMapTable.NewRemover; -import com.wenshuo.agent.javassist.bytecode.StackMapTable.Shifter; - -/** - * Another stack_map attribute defined in CLDC 1.1 for J2ME. - * - *

This is an entry in the attributes table of a Code attribute. - * It was introduced by J2ME CLDC 1.1 (JSR 139) for pre-verification. - * - *

According to the CLDC specification, the sizes of some fields are not 16bit - * but 32bit if the code size is more than 64K or the number of the local variables - * is more than 64K. However, for the J2ME CLDC technology, they are always 16bit. - * The implementation of the StackMap class assumes they are 16bit. - * - * @see MethodInfo#doPreverify - * @see StackMapTable - * @since 3.12 - */ -public class StackMap extends AttributeInfo { - /** - * The name of this attribute "StackMap". - */ - public static final String tag = "StackMap"; - - - /** - * Constructs a stack_map attribute. - */ - StackMap(ConstPool cp, byte[] newInfo) { - super(cp, tag, newInfo); - } - - StackMap(ConstPool cp, int name_id, DataInputStream in) - throws IOException - { - super(cp, name_id, in); - } - - /** - * Returns number_of_entries. - */ - public int numOfEntries() { - return ByteArray.readU16bit(info, 0); - } - - /** - * Top_variable_info.tag. - */ - public static final int TOP = 0; - - /** - * Integer_variable_info.tag. - */ - public static final int INTEGER = 1; - - /** - * Float_variable_info.tag. - */ - public static final int FLOAT = 2; - - /** - * Double_variable_info.tag. - */ - public static final int DOUBLE = 3; - - /** - * Long_variable_info.tag. - */ - public static final int LONG = 4; - - /** - * Null_variable_info.tag. - */ - public static final int NULL = 5; - - /** - * UninitializedThis_variable_info.tag. - */ - public static final int THIS = 6; - - /** - * Object_variable_info.tag. - */ - public static final int OBJECT = 7; - - /** - * Uninitialized_variable_info.tag. - */ - public static final int UNINIT = 8; - - /** - * Makes a copy. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - Copier copier = new Copier(this, newCp, classnames); - copier.visit(); - return copier.getStackMap(); - } - - /** - * A code walker for a StackMap attribute. - */ - public static class Walker { - byte[] info; - - /** - * Constructs a walker. - */ - public Walker(StackMap sm) { - info = sm.get(); - } - - /** - * Visits each entry of the stack map frames. - */ - public void visit() { - int num = ByteArray.readU16bit(info, 0); - int pos = 2; - for (int i = 0; i < num; i++) { - int offset = ByteArray.readU16bit(info, pos); - int numLoc = ByteArray.readU16bit(info, pos + 2); - pos = locals(pos + 4, offset, numLoc); - int numStack = ByteArray.readU16bit(info, pos); - pos = stack(pos + 2, offset, numStack); - } - } - - /** - * Invoked when locals of stack_map_frame - * is visited. - */ - public int locals(int pos, int offset, int num) { - return typeInfoArray(pos, offset, num, true); - } - - /** - * Invoked when stack of stack_map_frame - * is visited. - */ - public int stack(int pos, int offset, int num) { - return typeInfoArray(pos, offset, num, false); - } - - /** - * Invoked when an array of verification_type_info is - * visited. - * - * @param num the number of elements. - * @param isLocals true if this array is for locals. - * false if it is for stack. - */ - public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { - for (int k = 0; k < num; k++) - pos = typeInfoArray2(k, pos); - - return pos; - } - - int typeInfoArray2(int k, int pos) { - byte tag = info[pos]; - if (tag == OBJECT) { - int clazz = ByteArray.readU16bit(info, pos + 1); - objectVariable(pos, clazz); - pos += 3; - } - else if (tag == UNINIT) { - int offsetOfNew = ByteArray.readU16bit(info, pos + 1); - uninitialized(pos, offsetOfNew); - pos += 3; - } - else { - typeInfo(pos, tag); - pos++; - } - - return pos; - } - - /** - * Invoked when an element of verification_type_info - * (except Object_variable_info and - * Uninitialized_variable_info) is visited. - */ - public void typeInfo(int pos, byte tag) {} - - /** - * Invoked when an element of type Object_variable_info - * is visited. - */ - public void objectVariable(int pos, int clazz) {} - - /** - * Invoked when an element of type Uninitialized_variable_info - * is visited. - */ - public void uninitialized(int pos, int offset) {} - } - - static class Copier extends Walker { - byte[] dest; - ConstPool srcCp, destCp; - Map classnames; - - Copier(StackMap map, ConstPool newCp, Map classnames) { - super(map); - srcCp = map.getConstPool(); - dest = new byte[info.length]; - destCp = newCp; - this.classnames = classnames; - } - - public void visit() { - int num = ByteArray.readU16bit(info, 0); - ByteArray.write16bit(num, dest, 0); - super.visit(); - } - - public int locals(int pos, int offset, int num) { - ByteArray.write16bit(offset, dest, pos - 4); - return super.locals(pos, offset, num); - } - - public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { - ByteArray.write16bit(num, dest, pos - 2); - return super.typeInfoArray(pos, offset, num, isLocals); - } - - public void typeInfo(int pos, byte tag) { - dest[pos] = tag; - } - - public void objectVariable(int pos, int clazz) { - dest[pos] = OBJECT; - int newClazz = srcCp.copy(clazz, destCp, classnames); - ByteArray.write16bit(newClazz, dest, pos + 1); - } - - public void uninitialized(int pos, int offset) { - dest[pos] = UNINIT; - ByteArray.write16bit(offset, dest, pos + 1); - } - - public StackMap getStackMap() { - return new StackMap(destCp, dest); - } - } - - /** - * Updates this stack map table when a new local variable is inserted - * for a new parameter. - * - * @param index the index of the added local variable. - * @param tag the type tag of that local variable. - * It is available by StackMapTable.typeTagOf(char). - * @param classInfo the index of the CONSTANT_Class_info structure - * in a constant pool table. This should be zero unless the tag - * is ITEM_Object. - * - * @see javassist.CtBehavior#addParameter(javassist.CtClass) - * @see StackMapTable#typeTagOf(char) - * @see ConstPool - */ - public void insertLocal(int index, int tag, int classInfo) - throws BadBytecode - { - byte[] data = new InsertLocal(this, index, tag, classInfo).doit(); - this.set(data); - } - - static class SimpleCopy extends Walker { - Writer writer; - - SimpleCopy(StackMap map) { - super(map); - writer = new Writer(); - } - - byte[] doit() { - visit(); - return writer.toByteArray(); - } - - public void visit() { - int num = ByteArray.readU16bit(info, 0); - writer.write16bit(num); - super.visit(); - } - - public int locals(int pos, int offset, int num) { - writer.write16bit(offset); - return super.locals(pos, offset, num); - } - - public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { - writer.write16bit(num); - return super.typeInfoArray(pos, offset, num, isLocals); - } - - public void typeInfo(int pos, byte tag) { - writer.writeVerifyTypeInfo(tag, 0); - } - - public void objectVariable(int pos, int clazz) { - writer.writeVerifyTypeInfo(OBJECT, clazz); - } - - public void uninitialized(int pos, int offset) { - writer.writeVerifyTypeInfo(UNINIT, offset); - } - } - - static class InsertLocal extends SimpleCopy { - private int varIndex; - private int varTag, varData; - - InsertLocal(StackMap map, int varIndex, int varTag, int varData) { - super(map); - this.varIndex = varIndex; - this.varTag = varTag; - this.varData = varData; - } - - public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { - if (!isLocals || num < varIndex) - return super.typeInfoArray(pos, offset, num, isLocals); - - writer.write16bit(num + 1); - for (int k = 0; k < num; k++) { - if (k == varIndex) - writeVarTypeInfo(); - - pos = typeInfoArray2(k, pos); - } - - if (num == varIndex) - writeVarTypeInfo(); - - return pos; - } - - private void writeVarTypeInfo() { - if (varTag == OBJECT) - writer.writeVerifyTypeInfo(OBJECT, varData); - else if (varTag == UNINIT) - writer.writeVerifyTypeInfo(UNINIT, varData); - else - writer.writeVerifyTypeInfo(varTag, 0); - } - } - - void shiftPc(int where, int gapSize, boolean exclusive) - throws BadBytecode - { - new Shifter(this, where, gapSize, exclusive).visit(); - } - - static class Shifter extends Walker { - private int where, gap; - private boolean exclusive; - - public Shifter(StackMap smt, int where, int gap, boolean exclusive) { - super(smt); - this.where = where; - this.gap = gap; - this.exclusive = exclusive; - } - - public int locals(int pos, int offset, int num) { - if (exclusive ? where <= offset : where < offset) - ByteArray.write16bit(offset + gap, info, pos - 4); - - return super.locals(pos, offset, num); - } - - public void uninitialized(int pos, int offset) { - if (where <= offset) - ByteArray.write16bit(offset + gap, info, pos + 1); - } - } - - /** - * @see CodeIterator.Switcher#adjustOffsets(int, int) - */ - void shiftForSwitch(int where, int gapSize) throws BadBytecode { - new SwitchShifter(this, where, gapSize).visit(); - } - - static class SwitchShifter extends Walker { - private int where, gap; - - public SwitchShifter(StackMap smt, int where, int gap) { - super(smt); - this.where = where; - this.gap = gap; - } - - public int locals(int pos, int offset, int num) { - if (where == pos + offset) - ByteArray.write16bit(offset - gap, info, pos - 4); - else if (where == pos) - ByteArray.write16bit(offset + gap, info, pos - 4); - - return super.locals(pos, offset, num); - } - } - - /** - * Undocumented method. Do not use; internal-use only. - * - *

This method is for javassist.convert.TransformNew. - * It is called to update the stack map when - * the NEW opcode (and the following DUP) is removed. - * - * @param where the position of the removed NEW opcode. - */ - public void removeNew(int where) throws CannotCompileException { - byte[] data = new NewRemover(this, where).doit(); - this.set(data); - } - - static class NewRemover extends SimpleCopy { - int posOfNew; - - NewRemover(StackMap map, int where) { - super(map); - posOfNew = where; - } - - public int stack(int pos, int offset, int num) { - return stackTypeInfoArray(pos, offset, num); - } - - private int stackTypeInfoArray(int pos, int offset, int num) { - int p = pos; - int count = 0; - for (int k = 0; k < num; k++) { - byte tag = info[p]; - if (tag == OBJECT) - p += 3; - else if (tag == UNINIT) { - int offsetOfNew = ByteArray.readU16bit(info, p + 1); - if (offsetOfNew == posOfNew) - count++; - - p += 3; - } - else - p++; - } - - writer.write16bit(num - count); - for (int k = 0; k < num; k++) { - byte tag = info[pos]; - if (tag == OBJECT) { - int clazz = ByteArray.readU16bit(info, pos + 1); - objectVariable(pos, clazz); - pos += 3; - } - else if (tag == UNINIT) { - int offsetOfNew = ByteArray.readU16bit(info, pos + 1); - if (offsetOfNew != posOfNew) - uninitialized(pos, offsetOfNew); - - pos += 3; - } - else { - typeInfo(pos, tag); - pos++; - } - } - - return pos; - } - } - - /** - * Prints this stack map. - */ - public void print(java.io.PrintWriter out) { - new Printer(this, out).print(); - } - - static class Printer extends Walker { - private java.io.PrintWriter writer; - - public Printer(StackMap map, java.io.PrintWriter out) { - super(map); - writer = out; - } - - public void print() { - int num = ByteArray.readU16bit(info, 0); - writer.println(num + " entries"); - visit(); - } - - public int locals(int pos, int offset, int num) { - writer.println(" * offset " + offset); - return super.locals(pos, offset, num); - } - } - - /** - * Internal use only. - */ - public static class Writer { - // see javassist.bytecode.stackmap.MapMaker - - private ByteArrayOutputStream output; - - /** - * Constructs a writer. - */ - public Writer() { - output = new ByteArrayOutputStream(); - } - - /** - * Converts the written data into a byte array. - */ - public byte[] toByteArray() { - return output.toByteArray(); - } - - /** - * Converts to a StackMap attribute. - */ - public StackMap toStackMap(ConstPool cp) { - return new StackMap(cp, output.toByteArray()); - } - - /** - * Writes a union verification_type_info value. - * - * @param data cpool_index or offset. - */ - public void writeVerifyTypeInfo(int tag, int data) { - output.write(tag); - if (tag == StackMap.OBJECT || tag == StackMap.UNINIT) - write16bit(data); - } - - /** - * Writes a 16bit value. - */ - public void write16bit(int value) { - output.write((value >>> 8) & 0xff); - output.write(value & 0xff); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/StackMapTable.java b/src/com/wenshuo/agent/javassist/bytecode/StackMapTable.java deleted file mode 100644 index 5a843fe..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/StackMapTable.java +++ /dev/null @@ -1,1049 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.DataOutputStream; -import java.io.ByteArrayOutputStream; -import java.io.PrintWriter; -import java.io.IOException; -import java.util.Map; -import com.wenshuo.agent.javassist.CannotCompileException; - -/** - * stack_map attribute. - * - *

This is an entry in the attributes table of a Code attribute. - * It was introduced by J2SE 6 for the verification by - * typechecking. - * - * @see StackMap - * @since 3.4 - */ -public class StackMapTable extends AttributeInfo { - /** - * The name of this attribute "StackMapTable". - */ - public static final String tag = "StackMapTable"; - - /** - * Constructs a stack_map attribute. - */ - StackMapTable(ConstPool cp, byte[] newInfo) { - super(cp, tag, newInfo); - } - - StackMapTable(ConstPool cp, int name_id, DataInputStream in) - throws IOException - { - super(cp, name_id, in); - } - - /** - * Makes a copy. - * - * @exception RuntimeCopyException if a BadBytecode - * exception is thrown while copying, - * it is converted into - * RuntimeCopyException. - * - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) - throws RuntimeCopyException - { - try { - return new StackMapTable(newCp, - new Copier(this.constPool, info, newCp, classnames).doit()); - } - catch (BadBytecode e) { - throw new RuntimeCopyException("bad bytecode. fatal?"); - } - } - - /** - * An exception that may be thrown by copy() - * in StackMapTable. - */ - public static class RuntimeCopyException extends RuntimeException { - /** - * Constructs an exception. - */ - public RuntimeCopyException(String s) { - super(s); - } - } - - void write(DataOutputStream out) throws IOException { - super.write(out); - } - - /** - * Top_variable_info.tag. - */ - public static final int TOP = 0; - - /** - * Integer_variable_info.tag. - */ - public static final int INTEGER = 1; - - /** - * Float_variable_info.tag. - */ - public static final int FLOAT = 2; - - /** - * Double_variable_info.tag. - */ - public static final int DOUBLE = 3; - - /** - * Long_variable_info.tag. - */ - public static final int LONG = 4; - - /** - * Null_variable_info.tag. - */ - public static final int NULL = 5; - - /** - * UninitializedThis_variable_info.tag. - */ - public static final int THIS = 6; - - /** - * Object_variable_info.tag. - */ - public static final int OBJECT = 7; - - /** - * Uninitialized_variable_info.tag. - */ - public static final int UNINIT = 8; - - /** - * A code walker for a StackMapTable attribute. - */ - public static class Walker { - byte[] info; - int numOfEntries; - - /** - * Constructs a walker. - * - * @param smt the StackMapTable that this walker - * walks around. - */ - public Walker(StackMapTable smt) { - this(smt.get()); - } - - /** - * Constructs a walker. - * - * @param data the info field of the - * attribute_info structure. - * It can be obtained by get() - * in the AttributeInfo class. - */ - public Walker(byte[] data) { - info = data; - numOfEntries = ByteArray.readU16bit(data, 0); - } - - /** - * Returns the number of the entries. - */ - public final int size() { return numOfEntries; } - - /** - * Visits each entry of the stack map frames. - */ - public void parse() throws BadBytecode { - int n = numOfEntries; - int pos = 2; - for (int i = 0; i < n; i++) - pos = stackMapFrames(pos, i); - } - - /** - * Invoked when the next entry of the stack map frames is visited. - * - * @param pos the position of the frame in the info - * field of attribute_info structure. - * @param nth the frame is the N-th - * (0, 1st, 2nd, 3rd, 4th, ...) entry. - * @return the position of the next frame. - */ - int stackMapFrames(int pos, int nth) throws BadBytecode { - int type = info[pos] & 0xff; - if (type < 64) { - sameFrame(pos, type); - pos++; - } - else if (type < 128) - pos = sameLocals(pos, type); - else if (type < 247) - throw new BadBytecode("bad frame_type in StackMapTable"); - else if (type == 247) // SAME_LOCALS_1_STACK_ITEM_EXTENDED - pos = sameLocals(pos, type); - else if (type < 251) { - int offset = ByteArray.readU16bit(info, pos + 1); - chopFrame(pos, offset, 251 - type); - pos += 3; - } - else if (type == 251) { // SAME_FRAME_EXTENDED - int offset = ByteArray.readU16bit(info, pos + 1); - sameFrame(pos, offset); - pos += 3; - } - else if (type < 255) - pos = appendFrame(pos, type); - else // FULL_FRAME - pos = fullFrame(pos); - - return pos; - } - - /** - * Invoked if the visited frame is a same_frame or - * a same_frame_extended. - * - * @param pos the position of this frame in the info - * field of attribute_info structure. - * @param offsetDelta - */ - public void sameFrame(int pos, int offsetDelta) throws BadBytecode {} - - private int sameLocals(int pos, int type) throws BadBytecode { - int top = pos; - int offset; - if (type < 128) - offset = type - 64; - else { // type == 247 - offset = ByteArray.readU16bit(info, pos + 1); - pos += 2; - } - - int tag = info[pos + 1] & 0xff; - int data = 0; - if (tag == OBJECT || tag == UNINIT) { - data = ByteArray.readU16bit(info, pos + 2); - objectOrUninitialized(tag, data, pos + 2); - pos += 2; - } - - sameLocals(top, offset, tag, data); - return pos + 2; - } - - /** - * Invoked if the visited frame is a same_locals_1_stack_item_frame - * or a same_locals_1_stack_item_frame_extended. - * - * @param pos the position. - * @param offsetDelta - * @param stackTag stack[0].tag. - * @param stackData stack[0].cpool_index - * if the tag is OBJECT, - * or stack[0].offset - * if the tag is UNINIT. - */ - public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) - throws BadBytecode {} - - /** - * Invoked if the visited frame is a chop_frame. - * - * @param pos the position. - * @param offsetDelta - * @param k the k last locals are absent. - */ - public void chopFrame(int pos, int offsetDelta, int k) throws BadBytecode {} - - private int appendFrame(int pos, int type) throws BadBytecode { - int k = type - 251; - int offset = ByteArray.readU16bit(info, pos + 1); - int[] tags = new int[k]; - int[] data = new int[k]; - int p = pos + 3; - for (int i = 0; i < k; i++) { - int tag = info[p] & 0xff; - tags[i] = tag; - if (tag == OBJECT || tag == UNINIT) { - data[i] = ByteArray.readU16bit(info, p + 1); - objectOrUninitialized(tag, data[i], p + 1); - p += 3; - } - else { - data[i] = 0; - p++; - } - } - - appendFrame(pos, offset, tags, data); - return p; - } - - /** - * Invoked if the visited frame is a append_frame. - * - * @param pos the position. - * @param offsetDelta - * @param tags locals[i].tag. - * @param data locals[i].cpool_index - * or locals[i].offset. - */ - public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) - throws BadBytecode {} - - private int fullFrame(int pos) throws BadBytecode { - int offset = ByteArray.readU16bit(info, pos + 1); - int numOfLocals = ByteArray.readU16bit(info, pos + 3); - int[] localsTags = new int[numOfLocals]; - int[] localsData = new int[numOfLocals]; - int p = verifyTypeInfo(pos + 5, numOfLocals, localsTags, localsData); - int numOfItems = ByteArray.readU16bit(info, p); - int[] itemsTags = new int[numOfItems]; - int[] itemsData = new int[numOfItems]; - p = verifyTypeInfo(p + 2, numOfItems, itemsTags, itemsData); - fullFrame(pos, offset, localsTags, localsData, itemsTags, itemsData); - return p; - } - - /** - * Invoked if the visited frame is full_frame. - * - * @param pos the position. - * @param offsetDelta - * @param localTags locals[i].tag - * @param localData locals[i].cpool_index - * or locals[i].offset - * @param stackTags stack[i].tag - * @param stackData stack[i].cpool_index - * or stack[i].offset - */ - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) - throws BadBytecode {} - - private int verifyTypeInfo(int pos, int n, int[] tags, int[] data) { - for (int i = 0; i < n; i++) { - int tag = info[pos++] & 0xff; - tags[i] = tag; - if (tag == OBJECT || tag == UNINIT) { - data[i] = ByteArray.readU16bit(info, pos); - objectOrUninitialized(tag, data[i], pos); - pos += 2; - } - } - - return pos; - } - - /** - * Invoked if Object_variable_info - * or Uninitialized_variable_info is visited. - * - * @param tag OBJECT or UNINIT. - * @param data the value of cpool_index or offset. - * @param pos the position of cpool_index or offset. - */ - public void objectOrUninitialized(int tag, int data, int pos) {} - } - - static class SimpleCopy extends Walker { - private Writer writer; - - public SimpleCopy(byte[] data) { - super(data); - writer = new Writer(data.length); - } - - public byte[] doit() throws BadBytecode { - parse(); - return writer.toByteArray(); - } - - public void sameFrame(int pos, int offsetDelta) { - writer.sameFrame(offsetDelta); - } - - public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { - writer.sameLocals(offsetDelta, stackTag, copyData(stackTag, stackData)); - } - - public void chopFrame(int pos, int offsetDelta, int k) { - writer.chopFrame(offsetDelta, k); - } - - public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { - writer.appendFrame(offsetDelta, tags, copyData(tags, data)); - } - - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - writer.fullFrame(offsetDelta, localTags, copyData(localTags, localData), - stackTags, copyData(stackTags, stackData)); - } - - protected int copyData(int tag, int data) { - return data; - } - - protected int[] copyData(int[] tags, int[] data) { - return data; - } - } - - static class Copier extends SimpleCopy { - private ConstPool srcPool, destPool; - private Map classnames; - - public Copier(ConstPool src, byte[] data, ConstPool dest, Map names) { - super(data); - srcPool = src; - destPool = dest; - classnames = names; - } - - protected int copyData(int tag, int data) { - if (tag == OBJECT) - return srcPool.copy(data, destPool, classnames); - else - return data; - } - - protected int[] copyData(int[] tags, int[] data) { - int[] newData = new int[data.length]; - for (int i = 0; i < data.length; i++) - if (tags[i] == OBJECT) - newData[i] = srcPool.copy(data[i], destPool, classnames); - else - newData[i] = data[i]; - - return newData; - } - } - - /** - * Updates this stack map table when a new local variable is inserted - * for a new parameter. - * - * @param index the index of the added local variable. - * @param tag the type tag of that local variable. - * @param classInfo the index of the CONSTANT_Class_info structure - * in a constant pool table. This should be zero unless the tag - * is ITEM_Object. - * - * @see javassist.CtBehavior#addParameter(javassist.CtClass) - * @see #typeTagOf(char) - * @see ConstPool - */ - public void insertLocal(int index, int tag, int classInfo) - throws BadBytecode - { - byte[] data = new InsertLocal(this.get(), index, tag, classInfo).doit(); - this.set(data); - } - - /** - * Returns the tag of the type specified by the - * descriptor. This method returns INTEGER - * unless the descriptor is either D (double), F (float), - * J (long), L (class type), or [ (array). - * - * @param descriptor the type descriptor. - * @see Descriptor - */ - public static int typeTagOf(char descriptor) { - switch (descriptor) { - case 'D' : - return DOUBLE; - case 'F' : - return FLOAT; - case 'J' : - return LONG; - case 'L' : - case '[' : - return OBJECT; - // case 'V' : - default : - return INTEGER; - } - } - - /* This implementation assumes that a local variable initially - * holding a parameter value is never changed to be a different - * type. - * - */ - static class InsertLocal extends SimpleCopy { - private int varIndex; - private int varTag, varData; - - public InsertLocal(byte[] data, int varIndex, int varTag, int varData) { - super(data); - this.varIndex = varIndex; - this.varTag = varTag; - this.varData = varData; - } - - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - int len = localTags.length; - if (len < varIndex) { - super.fullFrame(pos, offsetDelta, localTags, localData, stackTags, stackData); - return; - } - - int typeSize = (varTag == LONG || varTag == DOUBLE) ? 2 : 1; - int[] localTags2 = new int[len + typeSize]; - int[] localData2 = new int[len + typeSize]; - int index = varIndex; - int j = 0; - for (int i = 0; i < len; i++) { - if (j == index) - j += typeSize; - - localTags2[j] = localTags[i]; - localData2[j++] = localData[i]; - } - - localTags2[index] = varTag; - localData2[index] = varData; - if (typeSize > 1) { - localTags2[index + 1] = TOP; - localData2[index + 1] = 0; - } - - super.fullFrame(pos, offsetDelta, localTags2, localData2, stackTags, stackData); - } - } - - /** - * A writer of stack map tables. - */ - public static class Writer { - ByteArrayOutputStream output; - int numOfEntries; - - /** - * Constructs a writer. - * @param size the initial buffer size. - */ - public Writer(int size) { - output = new ByteArrayOutputStream(size); - numOfEntries = 0; - output.write(0); // u2 number_of_entries - output.write(0); - } - - /** - * Returns the stack map table written out. - */ - public byte[] toByteArray() { - byte[] b = output.toByteArray(); - ByteArray.write16bit(numOfEntries, b, 0); - return b; - } - - /** - * Constructs and a return a stack map table containing - * the written stack map entries. - * - * @param cp the constant pool used to write - * the stack map entries. - */ - public StackMapTable toStackMapTable(ConstPool cp) { - return new StackMapTable(cp, toByteArray()); - } - - /** - * Writes a same_frame or a same_frame_extended. - */ - public void sameFrame(int offsetDelta) { - numOfEntries++; - if (offsetDelta < 64) - output.write(offsetDelta); - else { - output.write(251); // SAME_FRAME_EXTENDED - write16(offsetDelta); - } - } - - /** - * Writes a same_locals_1_stack_item - * or a same_locals_1_stack_item_extended. - * - * @param tag stack[0].tag. - * @param data stack[0].cpool_index - * if the tag is OBJECT, - * or stack[0].offset - * if the tag is UNINIT. - * Otherwise, this parameter is not used. - */ - public void sameLocals(int offsetDelta, int tag, int data) { - numOfEntries++; - if (offsetDelta < 64) - output.write(offsetDelta + 64); - else { - output.write(247); // SAME_LOCALS_1_STACK_ITEM_EXTENDED - write16(offsetDelta); - } - - writeTypeInfo(tag, data); - } - - /** - * Writes a chop_frame. - * - * @param k the number of absent locals. 1, 2, or 3. - */ - public void chopFrame(int offsetDelta, int k) { - numOfEntries++; - output.write(251 - k); - write16(offsetDelta); - } - - /** - * Writes a append_frame. The number of the appended - * locals is specified by the length of tags. - * - * @param tags locals[].tag. - * The length of this array must be - * either 1, 2, or 3. - * @param data locals[].cpool_index - * if the tag is OBJECT, - * or locals[].offset - * if the tag is UNINIT. - * Otherwise, this parameter is not used. - */ - public void appendFrame(int offsetDelta, int[] tags, int[] data) { - numOfEntries++; - int k = tags.length; // k is 1, 2, or 3 - output.write(k + 251); - write16(offsetDelta); - for (int i = 0; i < k; i++) - writeTypeInfo(tags[i], data[i]); - } - - /** - * Writes a full_frame. - * number_of_locals and number_of_stack_items - * are specified by the the length of localTags and - * stackTags. - * - * @param localTags locals[].tag. - * @param localData locals[].cpool_index - * if the tag is OBJECT, - * or locals[].offset - * if the tag is UNINIT. - * Otherwise, this parameter is not used. - * @param stackTags stack[].tag. - * @param stackData stack[].cpool_index - * if the tag is OBJECT, - * or stack[].offset - * if the tag is UNINIT. - * Otherwise, this parameter is not used. - */ - public void fullFrame(int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - numOfEntries++; - output.write(255); // FULL_FRAME - write16(offsetDelta); - int n = localTags.length; - write16(n); - for (int i = 0; i < n; i++) - writeTypeInfo(localTags[i], localData[i]); - - n = stackTags.length; - write16(n); - for (int i = 0; i < n; i++) - writeTypeInfo(stackTags[i], stackData[i]); - } - - private void writeTypeInfo(int tag, int data) { - output.write(tag); - if (tag == OBJECT || tag == UNINIT) - write16(data); - } - - private void write16(int value) { - output.write((value >>> 8) & 0xff); - output.write(value & 0xff); - } - } - - /** - * Prints the stack table map. - */ - public void println(PrintWriter w) { - Printer.print(this, w); - } - - /** - * Prints the stack table map. - * - * @param ps a print stream such as System.out. - */ - public void println(java.io.PrintStream ps) { - Printer.print(this, new java.io.PrintWriter(ps, true)); - } - - static class Printer extends Walker { - private PrintWriter writer; - private int offset; - - /** - * Prints the stack table map. - */ - public static void print(StackMapTable smt, PrintWriter writer) { - try { - new Printer(smt.get(), writer).parse(); - } - catch (BadBytecode e) { - writer.println(e.getMessage()); - } - } - - Printer(byte[] data, PrintWriter pw) { - super(data); - writer = pw; - offset = -1; - } - - public void sameFrame(int pos, int offsetDelta) { - offset += offsetDelta + 1; - writer.println(offset + " same frame: " + offsetDelta); - } - - public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { - offset += offsetDelta + 1; - writer.println(offset + " same locals: " + offsetDelta); - printTypeInfo(stackTag, stackData); - } - - public void chopFrame(int pos, int offsetDelta, int k) { - offset += offsetDelta + 1; - writer.println(offset + " chop frame: " + offsetDelta + ", " + k + " last locals"); - } - - public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { - offset += offsetDelta + 1; - writer.println(offset + " append frame: " + offsetDelta); - for (int i = 0; i < tags.length; i++) - printTypeInfo(tags[i], data[i]); - } - - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - offset += offsetDelta + 1; - writer.println(offset + " full frame: " + offsetDelta); - writer.println("[locals]"); - for (int i = 0; i < localTags.length; i++) - printTypeInfo(localTags[i], localData[i]); - - writer.println("[stack]"); - for (int i = 0; i < stackTags.length; i++) - printTypeInfo(stackTags[i], stackData[i]); - } - - private void printTypeInfo(int tag, int data) { - String msg = null; - switch (tag) { - case TOP : - msg = "top"; - break; - case INTEGER : - msg = "integer"; - break; - case FLOAT : - msg = "float"; - break; - case DOUBLE : - msg = "double"; - break; - case LONG : - msg = "long"; - break; - case NULL : - msg = "null"; - break; - case THIS : - msg = "this"; - break; - case OBJECT : - msg = "object (cpool_index " + data + ")"; - break; - case UNINIT : - msg = "uninitialized (offset " + data + ")"; - break; - } - - writer.print(" "); - writer.println(msg); - } - } - - void shiftPc(int where, int gapSize, boolean exclusive) - throws BadBytecode - { - new OffsetShifter(this, where, gapSize).parse(); - new Shifter(this, where, gapSize, exclusive).doit(); - } - - static class OffsetShifter extends Walker { - int where, gap; - - public OffsetShifter(StackMapTable smt, int where, int gap) { - super(smt); - this.where = where; - this.gap = gap; - } - - public void objectOrUninitialized(int tag, int data, int pos) { - if (tag == UNINIT) - if (where <= data) - ByteArray.write16bit(data + gap, info, pos); - } - } - - static class Shifter extends Walker { - private StackMapTable stackMap; - int where, gap; - int position; - byte[] updatedInfo; - boolean exclusive; - - public Shifter(StackMapTable smt, int where, int gap, boolean exclusive) { - super(smt); - stackMap = smt; - this.where = where; - this.gap = gap; - this.position = 0; - this.updatedInfo = null; - this.exclusive = exclusive; - } - - public void doit() throws BadBytecode { - parse(); - if (updatedInfo != null) - stackMap.set(updatedInfo); - } - - public void sameFrame(int pos, int offsetDelta) { - update(pos, offsetDelta, 0, 251); - } - - public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { - update(pos, offsetDelta, 64, 247); - } - - void update(int pos, int offsetDelta, int base, int entry) { - int oldPos = position; - position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); - boolean match; - if (exclusive) - match = oldPos < where && where <= position; - else - match = oldPos <= where && where < position; - - if (match) { - int newDelta = offsetDelta + gap; - position += gap; - if (newDelta < 64) - info[pos] = (byte)(newDelta + base); - else if (offsetDelta < 64) { - byte[] newinfo = insertGap(info, pos, 2); - newinfo[pos] = (byte)entry; - ByteArray.write16bit(newDelta, newinfo, pos + 1); - updatedInfo = newinfo; - } - else - ByteArray.write16bit(newDelta, info, pos + 1); - } - } - - static byte[] insertGap(byte[] info, int where, int gap) { - int len = info.length; - byte[] newinfo = new byte[len + gap]; - for (int i = 0; i < len; i++) - newinfo[i + (i < where ? 0 : gap)] = info[i]; - - return newinfo; - } - - public void chopFrame(int pos, int offsetDelta, int k) { - update(pos, offsetDelta); - } - - public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { - update(pos, offsetDelta); - } - - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - update(pos, offsetDelta); - } - - void update(int pos, int offsetDelta) { - int oldPos = position; - position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); - boolean match; - if (exclusive) - match = oldPos < where && where <= position; - else - match = oldPos <= where && where < position; - - if (match) { - int newDelta = offsetDelta + gap; - ByteArray.write16bit(newDelta, info, pos + 1); - position += gap; - } - } - } - - /** - * @see CodeIterator.Switcher#adjustOffsets(int, int) - */ - void shiftForSwitch(int where, int gapSize) throws BadBytecode { - new SwitchShifter(this, where, gapSize).doit(); - } - - static class SwitchShifter extends Shifter { - SwitchShifter(StackMapTable smt, int where, int gap) { - super(smt, where, gap, false); - } - - void update(int pos, int offsetDelta, int base, int entry) { - int oldPos = position; - position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); - int newDelta = offsetDelta; - if (where == position) - newDelta = offsetDelta - gap; - else if (where == oldPos) - newDelta = offsetDelta + gap; - else - return; - - if (offsetDelta < 64) - if (newDelta < 64) - info[pos] = (byte)(newDelta + base); - else { - byte[] newinfo = insertGap(info, pos, 2); - newinfo[pos] = (byte)entry; - ByteArray.write16bit(newDelta, newinfo, pos + 1); - updatedInfo = newinfo; - } - else - if (newDelta < 64) { - byte[] newinfo = deleteGap(info, pos, 2); - newinfo[pos] = (byte)(newDelta + base); - updatedInfo = newinfo; - } - else - ByteArray.write16bit(newDelta, info, pos + 1); - } - - static byte[] deleteGap(byte[] info, int where, int gap) { - where += gap; - int len = info.length; - byte[] newinfo = new byte[len - gap]; - for (int i = 0; i < len; i++) - newinfo[i - (i < where ? 0 : gap)] = info[i]; - - return newinfo; - } - - void update(int pos, int offsetDelta) { - int oldPos = position; - position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); - int newDelta = offsetDelta; - if (where == position) - newDelta = offsetDelta - gap; - else if (where == oldPos) - newDelta = offsetDelta + gap; - else - return; - - ByteArray.write16bit(newDelta, info, pos + 1); - } - } - - /** - * Undocumented method. Do not use; internal-use only. - * - *

This method is for javassist.convert.TransformNew. - * It is called to update the stack map table when - * the NEW opcode (and the following DUP) is removed. - * - * @param where the position of the removed NEW opcode. - */ - public void removeNew(int where) throws CannotCompileException { - try { - byte[] data = new NewRemover(this.get(), where).doit(); - this.set(data); - } - catch (BadBytecode e) { - throw new CannotCompileException("bad stack map table", e); - } - } - - static class NewRemover extends SimpleCopy { - int posOfNew; - - public NewRemover(byte[] data, int pos) { - super(data); - posOfNew = pos; - } - - public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { - if (stackTag == UNINIT && stackData == posOfNew) - super.sameFrame(pos, offsetDelta); - else - super.sameLocals(pos, offsetDelta, stackTag, stackData); - } - - public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, - int[] stackTags, int[] stackData) { - int n = stackTags.length - 1; - for (int i = 0; i < n; i++) - if (stackTags[i] == UNINIT && stackData[i] == posOfNew - && stackTags[i + 1] == UNINIT && stackData[i + 1] == posOfNew) { - n++; - int[] stackTags2 = new int[n - 2]; - int[] stackData2 = new int[n - 2]; - int k = 0; - for (int j = 0; j < n; j++) - if (j == i) - j++; - else { - stackTags2[k] = stackTags[j]; - stackData2[k++] = stackData[j]; - } - - stackTags = stackTags2; - stackData = stackData2; - break; - } - - super.fullFrame(pos, offsetDelta, localTags, localData, stackTags, stackData); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java deleted file mode 100644 index 52484b7..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.Map; - -/** - * Synthetic_attribute. - */ -public class SyntheticAttribute extends AttributeInfo { - /** - * The name of this attribute "Synthetic". - */ - public static final String tag = "Synthetic"; - - SyntheticAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Constructs a Synthetic attribute. - * - * @param cp a constant pool table. - */ - public SyntheticAttribute(ConstPool cp) { - super(cp, tag, new byte[0]); - } - - /** - * Makes a copy. - * - * @param newCp the constant pool table used by the new copy. - * @param classnames should be null. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - return new SyntheticAttribute(newCp); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java b/src/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java deleted file mode 100644 index 29f075f..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java +++ /dev/null @@ -1,360 +0,0 @@ -package com.wenshuo.agent.javassist.bytecode; - -import java.io.DataInputStream; -import java.io.IOException; -import java.util.HashMap; -import java.util.Map; -import com.wenshuo.agent.javassist.bytecode.annotation.TypeAnnotationsWriter; - -/** - * A class representing - * {@code RuntimeVisibleTypeAnnotations} attribute and - * {@code RuntimeInvisibleTypeAnnotations} attribute. - * - * @since 3.19 - */ -public class TypeAnnotationsAttribute extends AttributeInfo { - /** - * The name of the {@code RuntimeVisibleTypeAnnotations} attribute. - */ - public static final String visibleTag = "RuntimeVisibleTypeAnnotations"; - - /** - * The name of the {@code RuntimeInvisibleTypeAnnotations} attribute. - */ - public static final String invisibleTag = "RuntimeInvisibleTypeAnnotations"; - - /** - * Constructs a Runtime(In)VisibleTypeAnnotations_attribute. - * - * @param cp constant pool - * @param attrname attribute name (visibleTag or - * invisibleTag). - * @param info the contents of this attribute. It does not - * include attribute_name_index or - * attribute_length. - */ - public TypeAnnotationsAttribute(ConstPool cp, String attrname, byte[] info) { - super(cp, attrname, info); - } - - /** - * @param n the attribute name. - */ - TypeAnnotationsAttribute(ConstPool cp, int n, DataInputStream in) - throws IOException - { - super(cp, n, in); - } - - /** - * Returns num_annotations. - */ - public int numAnnotations() { - return ByteArray.readU16bit(info, 0); - } - - /** - * Copies this attribute and returns a new copy. - */ - public AttributeInfo copy(ConstPool newCp, Map classnames) { - Copier copier = new Copier(info, constPool, newCp, classnames); - try { - copier.annotationArray(); - return new TypeAnnotationsAttribute(newCp, getName(), copier.close()); - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * @param oldname a JVM class name. - * @param newname a JVM class name. - */ - void renameClass(String oldname, String newname) { - HashMap map = new HashMap(); - map.put(oldname, newname); - renameClass(map); - } - - void renameClass(Map classnames) { - Renamer renamer = new Renamer(info, getConstPool(), classnames); - try { - renamer.annotationArray(); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - - void getRefClasses(Map classnames) { renameClass(classnames); } - - /** - * To visit each elements of the type annotation attribute, - * call {@code annotationArray()}. - * - * @see #annotationArray() - */ - static class TAWalker extends AnnotationsAttribute.Walker { - SubWalker subWalker; - - TAWalker(byte[] attrInfo) { - super(attrInfo); - subWalker = new SubWalker(attrInfo); - } - - int annotationArray(int pos, int num) throws Exception { - for (int i = 0; i < num; i++) { - int targetType = info[pos] & 0xff; - pos = subWalker.targetInfo(pos + 1, targetType); - pos = subWalker.typePath(pos); - pos = annotation(pos); - } - - return pos; - } - } - - static class SubWalker { - byte[] info; - - SubWalker(byte[] attrInfo) { - info = attrInfo; - } - - final int targetInfo(int pos, int type) throws Exception { - switch (type) { - case 0x00: - case 0x01: { - int index = info[pos] & 0xff; - typeParameterTarget(pos, type, index); - return pos + 1; } - case 0x10: { - int index = ByteArray.readU16bit(info, pos); - supertypeTarget(pos, index); - return pos + 2; } - case 0x11: - case 0x12: { - int param = info[pos] & 0xff; - int bound = info[pos + 1] & 0xff; - typeParameterBoundTarget(pos, type, param, bound); - return pos + 2; } - case 0x13: - case 0x14: - case 0x15: - emptyTarget(pos, type); - return pos; - case 0x16: { - int index = info[pos] & 0xff; - formalParameterTarget(pos, index); - return pos + 1; } - case 0x17: { - int index = ByteArray.readU16bit(info, pos); - throwsTarget(pos, index); - return pos + 2; } - case 0x40: - case 0x41: { - int len = ByteArray.readU16bit(info, pos); - return localvarTarget(pos + 2, type, len); } - case 0x42: { - int index = ByteArray.readU16bit(info, pos); - catchTarget(pos, index); - return pos + 2; } - case 0x43: - case 0x44: - case 0x45: - case 0x46: { - int offset = ByteArray.readU16bit(info, pos); - offsetTarget(pos, type, offset); - return pos + 2; } - case 0x47: - case 0x48: - case 0x49: - case 0x4a: - case 0x4b: { - int offset = ByteArray.readU16bit(info, pos); - int index = info[pos + 2] & 0xff; - typeArgumentTarget(pos, type, offset, index); - return pos + 3; } - default: - throw new RuntimeException("invalid target type: " + type); - } - } - - void typeParameterTarget(int pos, int targetType, int typeParameterIndex) - throws Exception {} - - void supertypeTarget(int pos, int superTypeIndex) throws Exception {} - - void typeParameterBoundTarget(int pos, int targetType, int typeParameterIndex, - int boundIndex) throws Exception {} - - void emptyTarget(int pos, int targetType) throws Exception {} - - void formalParameterTarget(int pos, int formalParameterIndex) throws Exception {} - - void throwsTarget(int pos, int throwsTypeIndex) throws Exception {} - - int localvarTarget(int pos, int targetType, int tableLength) throws Exception { - for (int i = 0; i < tableLength; i++) { - int start = ByteArray.readU16bit(info, pos); - int length = ByteArray.readU16bit(info, pos + 2); - int index = ByteArray.readU16bit(info, pos + 4); - localvarTarget(pos, targetType, start, length, index); - pos += 6; - } - - return pos; - } - - void localvarTarget(int pos, int targetType, int startPc, int length, int index) - throws Exception {} - - void catchTarget(int pos, int exceptionTableIndex) throws Exception {} - - void offsetTarget(int pos, int targetType, int offset) throws Exception {} - - void typeArgumentTarget(int pos, int targetType, int offset, int typeArgumentIndex) - throws Exception {} - - final int typePath(int pos) throws Exception { - int len = info[pos++] & 0xff; - return typePath(pos, len); - } - - int typePath(int pos, int pathLength) throws Exception { - for (int i = 0; i < pathLength; i++) { - int kind = info[pos] & 0xff; - int index = info[pos + 1] & 0xff; - typePath(pos, kind, index); - pos += 2; - } - - return pos; - } - - void typePath(int pos, int typePathKind, int typeArgumentIndex) throws Exception {} - } - - static class Renamer extends AnnotationsAttribute.Renamer { - SubWalker sub; - - Renamer(byte[] attrInfo, ConstPool cp, Map map) { - super(attrInfo, cp, map); - sub = new SubWalker(attrInfo); - } - - int annotationArray(int pos, int num) throws Exception { - for (int i = 0; i < num; i++) { - int targetType = info[pos] & 0xff; - pos = sub.targetInfo(pos + 1, targetType); - pos = sub.typePath(pos); - pos = annotation(pos); - } - - return pos; - } - } - - static class Copier extends AnnotationsAttribute.Copier { - SubCopier sub; - - Copier(byte[] attrInfo, ConstPool src, ConstPool dest, Map map) { - super(attrInfo, src, dest, map, false); - TypeAnnotationsWriter w = new TypeAnnotationsWriter(output, dest); - writer = w; - sub = new SubCopier(attrInfo, src, dest, map, w); - } - - int annotationArray(int pos, int num) throws Exception { - writer.numAnnotations(num); - for (int i = 0; i < num; i++) { - int targetType = info[pos] & 0xff; - pos = sub.targetInfo(pos + 1, targetType); - pos = sub.typePath(pos); - pos = annotation(pos); - } - - return pos; - } - } - - static class SubCopier extends SubWalker { - ConstPool srcPool, destPool; - Map classnames; - TypeAnnotationsWriter writer; - - SubCopier(byte[] attrInfo, ConstPool src, ConstPool dest, Map map, - TypeAnnotationsWriter w) - { - super(attrInfo); - srcPool = src; - destPool = dest; - classnames = map; - writer = w; - } - - void typeParameterTarget(int pos, int targetType, int typeParameterIndex) - throws Exception - { - writer.typeParameterTarget(targetType, typeParameterIndex); - } - - void supertypeTarget(int pos, int superTypeIndex) throws Exception { - writer.supertypeTarget(superTypeIndex); - } - - void typeParameterBoundTarget(int pos, int targetType, int typeParameterIndex, - int boundIndex) - throws Exception - { - writer.typeParameterBoundTarget(targetType, typeParameterIndex, boundIndex); - } - - void emptyTarget(int pos, int targetType) throws Exception { - writer.emptyTarget(targetType); - } - - void formalParameterTarget(int pos, int formalParameterIndex) throws Exception { - writer.formalParameterTarget(formalParameterIndex); - } - - void throwsTarget(int pos, int throwsTypeIndex) throws Exception { - writer.throwsTarget(throwsTypeIndex); - } - - int localvarTarget(int pos, int targetType, int tableLength) throws Exception { - writer.localVarTarget(targetType, tableLength); - return super.localvarTarget(pos, targetType, tableLength); - } - - void localvarTarget(int pos, int targetType, int startPc, int length, int index) - throws Exception - { - writer.localVarTargetTable(startPc, length, index); - } - - void catchTarget(int pos, int exceptionTableIndex) throws Exception { - writer.catchTarget(exceptionTableIndex); - } - - void offsetTarget(int pos, int targetType, int offset) throws Exception { - writer.offsetTarget(targetType, offset); - } - - void typeArgumentTarget(int pos, int targetType, int offset, int typeArgumentIndex) - throws Exception - { - writer.typeArgumentTarget(targetType, offset, typeArgumentIndex); - } - - int typePath(int pos, int pathLength) throws Exception { - writer.typePath(pathLength); - return super.typePath(pos, pathLength); - } - - void typePath(int pos, int typePathKind, int typeArgumentIndex) throws Exception { - writer.typePathPath(typePathKind, typeArgumentIndex); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java deleted file mode 100644 index e70d005..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java +++ /dev/null @@ -1,423 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.Iterator; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.AccessFlag; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.ExceptionTable; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.Opcode; - -/** - * A data-flow analyzer that determines the type state of the stack and local - * variable table at every reachable instruction in a method. During analysis, - * bytecode verification is performed in a similar manner to that described - * in the JVM specification. - * - *

Example:

- * - * 
- * // Method to analyze
- * public Object doSomething(int x) {
- *     Number n;
- *     if (x < 5) {
- *        n = new Double(0);
- *     } else {
- *        n = new Long(0);
- *     }
- *
- *     return n;
- * }
- *
- * // Which compiles to:
- * // 0:   iload_1
- * // 1:   iconst_5
- * // 2:   if_icmpge   17
- * // 5:   new #18; //class java/lang/Double
- * // 8:   dup
- * // 9:   dconst_0
- * // 10:  invokespecial   #44; //Method java/lang/Double."<init>":(D)V
- * // 13:  astore_2
- * // 14:  goto    26
- * // 17:  new #16; //class java/lang/Long
- * // 20:  dup
- * // 21:  lconst_1
- * // 22:  invokespecial   #47; //Method java/lang/Long."<init>":(J)V
- * // 25:  astore_2
- * // 26:  aload_2
- * // 27:  areturn
- *
- * public void analyzeIt(CtClass clazz, MethodInfo method) {
- *     Analyzer analyzer = new Analyzer();
- *     Frame[] frames = analyzer.analyze(clazz, method);
- *     frames[0].getLocal(0).getCtClass(); // returns clazz;
- *     frames[0].getLocal(1).getCtClass(); // returns java.lang.String
- *     frames[1].peek(); // returns Type.INTEGER
- *     frames[27].peek().getCtClass(); // returns java.lang.Number
- * }
- *
- * - * @see FramePrinter - * @author Jason T. Greene - */ -public class Analyzer implements Opcode { - private final SubroutineScanner scanner = new SubroutineScanner(); - private CtClass clazz; - private ExceptionInfo[] exceptions; - private Frame[] frames; - private Subroutine[] subroutines; - - private static class ExceptionInfo { - private int end; - private int handler; - private int start; - private Type type; - - private ExceptionInfo(int start, int end, int handler, Type type) { - this.start = start; - this.end = end; - this.handler = handler; - this.type = type; - } - } - - /** - * Performs data-flow analysis on a method and returns an array, indexed by - * instruction position, containing the starting frame state of all reachable - * instructions. Non-reachable code, and illegal code offsets are represented - * as a null in the frame state array. This can be used to detect dead code. - * - * If the method does not contain code (it is either native or abstract), null - * is returned. - * - * @param clazz the declaring class of the method - * @param method the method to analyze - * @return an array, indexed by instruction position, of the starting frame state, - * or null if this method doesn't have code - * @throws BadBytecode if the bytecode does not comply with the JVM specification - */ - public Frame[] analyze(CtClass clazz, MethodInfo method) throws BadBytecode { - this.clazz = clazz; - CodeAttribute codeAttribute = method.getCodeAttribute(); - // Native or Abstract - if (codeAttribute == null) - return null; - - int maxLocals = codeAttribute.getMaxLocals(); - int maxStack = codeAttribute.getMaxStack(); - int codeLength = codeAttribute.getCodeLength(); - - CodeIterator iter = codeAttribute.iterator(); - IntQueue queue = new IntQueue(); - - exceptions = buildExceptionInfo(method); - subroutines = scanner.scan(method); - - Executor executor = new Executor(clazz.getClassPool(), method.getConstPool()); - frames = new Frame[codeLength]; - frames[iter.lookAhead()] = firstFrame(method, maxLocals, maxStack); - queue.add(iter.next()); - while (!queue.isEmpty()) { - analyzeNextEntry(method, iter, queue, executor); - } - - return frames; - } - - /** - * Performs data-flow analysis on a method and returns an array, indexed by - * instruction position, containing the starting frame state of all reachable - * instructions. Non-reachable code, and illegal code offsets are represented - * as a null in the frame state array. This can be used to detect dead code. - * - * If the method does not contain code (it is either native or abstract), null - * is returned. - * - * @param method the method to analyze - * @return an array, indexed by instruction position, of the starting frame state, - * or null if this method doesn't have code - * @throws BadBytecode if the bytecode does not comply with the JVM specification - */ - public Frame[] analyze(CtMethod method) throws BadBytecode { - return analyze(method.getDeclaringClass(), method.getMethodInfo2()); - } - - private void analyzeNextEntry(MethodInfo method, CodeIterator iter, - IntQueue queue, Executor executor) throws BadBytecode { - int pos = queue.take(); - iter.move(pos); - iter.next(); - - Frame frame = frames[pos].copy(); - Subroutine subroutine = subroutines[pos]; - - try { - executor.execute(method, pos, iter, frame, subroutine); - } catch (RuntimeException e) { - throw new BadBytecode(e.getMessage() + "[pos = " + pos + "]", e); - } - - int opcode = iter.byteAt(pos); - - if (opcode == TABLESWITCH) { - mergeTableSwitch(queue, pos, iter, frame); - } else if (opcode == LOOKUPSWITCH) { - mergeLookupSwitch(queue, pos, iter, frame); - } else if (opcode == RET) { - mergeRet(queue, iter, pos, frame, subroutine); - } else if (Util.isJumpInstruction(opcode)) { - int target = Util.getJumpTarget(pos, iter); - - if (Util.isJsr(opcode)) { - // Merge the state before the jsr into the next instruction - mergeJsr(queue, frames[pos], subroutines[target], pos, lookAhead(iter, pos)); - } else if (! Util.isGoto(opcode)) { - merge(queue, frame, lookAhead(iter, pos)); - } - - merge(queue, frame, target); - } else if (opcode != ATHROW && ! Util.isReturn(opcode)) { - // Can advance to next instruction - merge(queue, frame, lookAhead(iter, pos)); - } - - // Merge all exceptions that are reachable from this instruction. - // The redundancy is intentional, since the state must be based - // on the current instruction frame. - mergeExceptionHandlers(queue, method, pos, frame); - } - - private ExceptionInfo[] buildExceptionInfo(MethodInfo method) { - ConstPool constPool = method.getConstPool(); - ClassPool classes = clazz.getClassPool(); - - ExceptionTable table = method.getCodeAttribute().getExceptionTable(); - ExceptionInfo[] exceptions = new ExceptionInfo[table.size()]; - for (int i = 0; i < table.size(); i++) { - int index = table.catchType(i); - Type type; - try { - type = index == 0 ? Type.THROWABLE : Type.get(classes.get(constPool.getClassInfo(index))); - } catch (NotFoundException e) { - throw new IllegalStateException(e.getMessage()); - } - - exceptions[i] = new ExceptionInfo(table.startPc(i), table.endPc(i), table.handlerPc(i), type); - } - - return exceptions; - } - - private Frame firstFrame(MethodInfo method, int maxLocals, int maxStack) { - int pos = 0; - - Frame first = new Frame(maxLocals, maxStack); - if ((method.getAccessFlags() & AccessFlag.STATIC) == 0) { - first.setLocal(pos++, Type.get(clazz)); - } - - CtClass[] parameters; - try { - parameters = Descriptor.getParameterTypes(method.getDescriptor(), clazz.getClassPool()); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - - for (int i = 0; i < parameters.length; i++) { - Type type = zeroExtend(Type.get(parameters[i])); - first.setLocal(pos++, type); - if (type.getSize() == 2) - first.setLocal(pos++, Type.TOP); - } - - return first; - } - - private int getNext(CodeIterator iter, int of, int restore) throws BadBytecode { - iter.move(of); - iter.next(); - int next = iter.lookAhead(); - iter.move(restore); - iter.next(); - - return next; - } - - private int lookAhead(CodeIterator iter, int pos) throws BadBytecode { - if (! iter.hasNext()) - throw new BadBytecode("Execution falls off end! [pos = " + pos + "]"); - - return iter.lookAhead(); - } - - - private void merge(IntQueue queue, Frame frame, int target) { - Frame old = frames[target]; - boolean changed; - - if (old == null) { - frames[target] = frame.copy(); - changed = true; - } else { - changed = old.merge(frame); - } - - if (changed) { - queue.add(target); - } - } - - private void mergeExceptionHandlers(IntQueue queue, MethodInfo method, int pos, Frame frame) { - for (int i = 0; i < exceptions.length; i++) { - ExceptionInfo exception = exceptions[i]; - - // Start is inclusive, while end is exclusive! - if (pos >= exception.start && pos < exception.end) { - Frame newFrame = frame.copy(); - newFrame.clearStack(); - newFrame.push(exception.type); - merge(queue, newFrame, exception.handler); - } - } - } - - private void mergeJsr(IntQueue queue, Frame frame, Subroutine sub, int pos, int next) throws BadBytecode { - if (sub == null) - throw new BadBytecode("No subroutine at jsr target! [pos = " + pos + "]"); - - Frame old = frames[next]; - boolean changed = false; - - if (old == null) { - old = frames[next] = frame.copy(); - changed = true; - } else { - for (int i = 0; i < frame.localsLength(); i++) { - // Skip everything accessed by a subroutine, mergeRet must handle this - if (!sub.isAccessed(i)) { - Type oldType = old.getLocal(i); - Type newType = frame.getLocal(i); - if (oldType == null) { - old.setLocal(i, newType); - changed = true; - continue; - } - - newType = oldType.merge(newType); - // Always set the type, in case a multi-type switched to a standard type. - old.setLocal(i, newType); - if (!newType.equals(oldType) || newType.popChanged()) - changed = true; - } - } - } - - if (! old.isJsrMerged()) { - old.setJsrMerged(true); - changed = true; - } - - if (changed && old.isRetMerged()) - queue.add(next); - - } - - private void mergeLookupSwitch(IntQueue queue, int pos, CodeIterator iter, Frame frame) throws BadBytecode { - int index = (pos & ~3) + 4; - // default - merge(queue, frame, pos + iter.s32bitAt(index)); - int npairs = iter.s32bitAt(index += 4); - int end = npairs * 8 + (index += 4); - - // skip "match" - for (index += 4; index < end; index += 8) { - int target = iter.s32bitAt(index) + pos; - merge(queue, frame, target); - } - } - - private void mergeRet(IntQueue queue, CodeIterator iter, int pos, Frame frame, Subroutine subroutine) throws BadBytecode { - if (subroutine == null) - throw new BadBytecode("Ret on no subroutine! [pos = " + pos + "]"); - - Iterator callerIter = subroutine.callers().iterator(); - while (callerIter.hasNext()) { - int caller = ((Integer) callerIter.next()).intValue(); - int returnLoc = getNext(iter, caller, pos); - boolean changed = false; - - Frame old = frames[returnLoc]; - if (old == null) { - old = frames[returnLoc] = frame.copyStack(); - changed = true; - } else { - changed = old.mergeStack(frame); - } - - for (Iterator i = subroutine.accessed().iterator(); i.hasNext(); ) { - int index = ((Integer)i.next()).intValue(); - Type oldType = old.getLocal(index); - Type newType = frame.getLocal(index); - if (oldType != newType) { - old.setLocal(index, newType); - changed = true; - } - } - - if (! old.isRetMerged()) { - old.setRetMerged(true); - changed = true; - } - - if (changed && old.isJsrMerged()) - queue.add(returnLoc); - } - } - - - private void mergeTableSwitch(IntQueue queue, int pos, CodeIterator iter, Frame frame) throws BadBytecode { - // Skip 4 byte alignment padding - int index = (pos & ~3) + 4; - // default - merge(queue, frame, pos + iter.s32bitAt(index)); - int low = iter.s32bitAt(index += 4); - int high = iter.s32bitAt(index += 4); - int end = (high - low + 1) * 4 + (index += 4); - - // Offset table - for (; index < end; index += 4) { - int target = iter.s32bitAt(index) + pos; - merge(queue, frame, target); - } - } - - private Type zeroExtend(Type type) { - if (type == Type.SHORT || type == Type.BYTE || type == Type.CHAR || type == Type.BOOLEAN) - return Type.INTEGER; - - return type; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java deleted file mode 100644 index d37d84c..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java +++ /dev/null @@ -1,504 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.ArrayList; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.stackmap.BasicBlock; - -/** - * Represents the control flow graph of a given method. - * - *

To obtain the control flow graph, do the following:

- * - * 
CtMethod m = ...
- * ControlFlow cf = new ControlFlow(m);
- * Block[] blocks = cf.basicBlocks();
- *
- * - *

blocks is an array of basic blocks in - * that method body.

- * - * @see javassist.CtMethod - * @see Block - * @see Frame - * @see Analyzer - * @author Shigeru Chiba - * @since 3.16 - */ -public class ControlFlow { - private CtClass clazz; - private MethodInfo methodInfo; - private Block[] basicBlocks; - private Frame[] frames; - - /** - * Constructs a control-flow analyzer for the given method. - */ - public ControlFlow(CtMethod method) throws BadBytecode { - this(method.getDeclaringClass(), method.getMethodInfo2()); - } - - /** - * Constructs a control-flow analyzer. - */ - public ControlFlow(CtClass ctclazz, MethodInfo minfo) throws BadBytecode { - clazz = ctclazz; - methodInfo = minfo; - frames = null; - basicBlocks = (Block[])new BasicBlock.Maker() { - protected BasicBlock makeBlock(int pos) { - return new Block(pos, methodInfo); - } - protected BasicBlock[] makeArray(int size) { - return new Block[size]; - } - }.make(minfo); - int size = basicBlocks.length; - int[] counters = new int[size]; - for (int i = 0; i < size; i++) { - Block b = basicBlocks[i]; - b.index = i; - b.entrances = new Block[b.incomings()]; - counters[i] = 0; - } - - for (int i = 0; i < size; i++) { - Block b = basicBlocks[i]; - for (int k = 0; k < b.exits(); k++) { - Block e = b.exit(k); - e.entrances[counters[e.index]++] = b; - } - - ControlFlow.Catcher[] catchers = b.catchers(); - for (int k = 0; k < catchers.length; k++) { - Block catchBlock = catchers[k].node; - catchBlock.entrances[counters[catchBlock.index]++] = b; - } - } - } - - /** - * Returns all the basic blocks in the method body. - */ - public Block[] basicBlocks() { - return basicBlocks; - } - - /** - * Returns the types of the local variables and stack frame entries - * available at the given position. If the byte at the position is - * not the first byte of an instruction, then this method returns - * null. - * - * @param pos the position. - */ - public Frame frameAt(int pos) throws BadBytecode { - if (frames == null) - frames = new Analyzer().analyze(clazz, methodInfo); - - return frames[pos]; - } - - /** - * Constructs a dominator tree. This method returns an array of - * the tree nodes. The first element of the array is the root - * of the tree. - * - *

The order of the elements is the same as that - * of the elements in the Block array returned - * by the basicBlocks - * method. If a Block object is at the i-th position - * in the Block array, then - * the Node object referring to that - * Block object is at the i-th position in the - * array returned by this method. - * For every array element node, its index in the - * array is equivalent to node.block().index(). - * - * @return an array of the tree nodes, or null if the method is abstract. - * @see Node#block() - * @see Block#index() - */ - public Node[] dominatorTree() { - int size = basicBlocks.length; - if (size == 0) - return null; - - Node[] nodes = new Node[size]; - boolean[] visited = new boolean[size]; - int[] distance = new int[size]; - for (int i = 0; i < size; i++) { - nodes[i] = new Node(basicBlocks[i]); - visited[i] = false; - } - - Access access = new Access(nodes) { - BasicBlock[] exits(Node n) { return n.block.getExit(); } - BasicBlock[] entrances(Node n) { return n.block.entrances; } - }; - nodes[0].makeDepth1stTree(null, visited, 0, distance, access); - do { - for (int i = 0; i < size; i++) - visited[i] = false; - } while (nodes[0].makeDominatorTree(visited, distance, access)); - Node.setChildren(nodes); - return nodes; - } - - /** - * Constructs a post dominator tree. This method returns an array of - * the tree nodes. Note that the tree has multiple roots. - * The parent of the root nodes is null. - * - *

The order of the elements is the same as that - * of the elements in the Block array returned - * by the basicBlocks - * method. If a Block object is at the i-th position - * in the Block array, then - * the Node object referring to that - * Block object is at the i-th position in the - * array returned by this method. - * For every array element node, its index in the - * array is equivalent to node.block().index(). - * - * @return an array of the tree nodes, or null if the method is abstract. - * @see Node#block() - * @see Block#index() - */ - public Node[] postDominatorTree() { - int size = basicBlocks.length; - if (size == 0) - return null; - - Node[] nodes = new Node[size]; - boolean[] visited = new boolean[size]; - int[] distance = new int[size]; - for (int i = 0; i < size; i++) { - nodes[i] = new Node(basicBlocks[i]); - visited[i] = false; - } - - Access access = new Access(nodes) { - BasicBlock[] exits(Node n) { return n.block.entrances; } - BasicBlock[] entrances(Node n) { return n.block.getExit(); } - }; - - int counter = 0; - for (int i = 0; i < size; i++) - if (nodes[i].block.exits() == 0) - counter = nodes[i].makeDepth1stTree(null, visited, counter, distance, access); - - boolean changed; - do { - for (int i = 0; i < size; i++) - visited[i] = false; - - changed = false; - for (int i = 0; i < size; i++) - if (nodes[i].block.exits() == 0) - if (nodes[i].makeDominatorTree(visited, distance, access)) - changed = true; - } while (changed); - - Node.setChildren(nodes); - return nodes; - } - - /** - * Basic block. - * It is a sequence of contiguous instructions that do not contain - * jump/branch instructions except the last one. - * Since Java6 or later does not allow JSR, - * we deal with JSR as a non-branch instruction. - */ - public static class Block extends BasicBlock { - /** - * A field that can be freely used for storing extra data. - * A client program of this control-flow analyzer can append - * an additional attribute to a Block object. - * The Javassist library never accesses this field. - */ - public Object clientData = null; - - int index; - MethodInfo method; - Block[] entrances; - - Block(int pos, MethodInfo minfo) { - super(pos); - method = minfo; - } - - protected void toString2(StringBuffer sbuf) { - super.toString2(sbuf); - sbuf.append(", incoming{"); - for (int i = 0; i < entrances.length; i++) - sbuf.append(entrances[i].position).append(", "); - - sbuf.append("}"); - } - - BasicBlock[] getExit() { return exit; } - - /** - * Returns the position of this block in the array of - * basic blocks that the basicBlocks method - * returns. - * - * @see #basicBlocks() - */ - public int index() { return index; } - - /** - * Returns the position of the first instruction - * in this block. - */ - public int position() { return position; } - - /** - * Returns the length of this block. - */ - public int length() { return length; } - - /** - * Returns the number of the control paths entering this block. - */ - public int incomings() { return incoming; } - - /** - * Returns the block that the control may jump into this block from. - */ - public Block incoming(int n) { - return entrances[n]; - } - - /** - * Return the number of the blocks that may be executed - * after this block. - */ - public int exits() { return exit == null ? 0 : exit.length; } - - /** - * Returns the n-th block that may be executed after this - * block. - * - * @param n an index in the array of exit blocks. - */ - public Block exit(int n) { return (Block)exit[n]; } - - /** - * Returns catch clauses that will catch an exception thrown - * in this block. - */ - public Catcher[] catchers() { - ArrayList catchers = new ArrayList(); - BasicBlock.Catch c = toCatch; - while (c != null) { - catchers.add(new Catcher(c)); - c = c.next; - } - - return (Catcher[])catchers.toArray(new Catcher[catchers.size()]); - } - } - - static abstract class Access { - Node[] all; - Access(Node[] nodes) { all = nodes; } - Node node(BasicBlock b) { return all[((Block)b).index]; } - abstract BasicBlock[] exits(Node n); - abstract BasicBlock[] entrances(Node n); - } - - /** - * A node of (post) dominator trees. - */ - public static class Node { - private Block block; - private Node parent; - private Node[] children; - - Node(Block b) { - block = b; - parent = null; - } - - /** - * Returns a String representation. - */ - public String toString() { - StringBuffer sbuf = new StringBuffer(); - sbuf.append("Node[pos=").append(block().position()); - sbuf.append(", parent="); - sbuf.append(parent == null ? "*" : Integer.toString(parent.block().position())); - sbuf.append(", children{"); - for (int i = 0; i < children.length; i++) - sbuf.append(children[i].block().position()).append(", "); - - sbuf.append("}]"); - return sbuf.toString(); - } - - /** - * Returns the basic block indicated by this node. - */ - public Block block() { return block; } - - /** - * Returns the parent of this node. - */ - public Node parent() { return parent; } - - /** - * Returns the number of the children of this node. - */ - public int children() { return children.length; } - - /** - * Returns the n-th child of this node. - * - * @param n an index in the array of children. - */ - public Node child(int n) { return children[n]; } - - /* - * After executing this method, distance[] represents the post order of the tree nodes. - * It also represents distances from the root; a bigger number represents a shorter - * distance. parent is set to its parent in the depth first spanning tree. - */ - int makeDepth1stTree(Node caller, boolean[] visited, int counter, int[] distance, Access access) { - int index = block.index; - if (visited[index]) - return counter; - - visited[index] = true; - parent = caller; - BasicBlock[] exits = access.exits(this); - if (exits != null) - for (int i = 0; i < exits.length; i++) { - Node n = access.node(exits[i]); - counter = n.makeDepth1stTree(this, visited, counter, distance, access); - } - - distance[index] = counter++; - return counter; - } - - boolean makeDominatorTree(boolean[] visited, int[] distance, Access access) { - int index = block.index; - if (visited[index]) - return false; - - visited[index] = true; - boolean changed = false; - BasicBlock[] exits = access.exits(this); - if (exits != null) - for (int i = 0; i < exits.length; i++) { - Node n = access.node(exits[i]); - if (n.makeDominatorTree(visited, distance, access)) - changed = true; - } - - BasicBlock[] entrances = access.entrances(this); - if (entrances != null) - for (int i = 0; i < entrances.length; i++) { - if (parent != null) { - Node n = getAncestor(parent, access.node(entrances[i]), distance); - if (n != parent) { - parent = n; - changed = true; - } - } - } - - return changed; - } - - private static Node getAncestor(Node n1, Node n2, int[] distance) { - while (n1 != n2) { - if (distance[n1.block.index] < distance[n2.block.index]) - n1 = n1.parent; - else - n2 = n2.parent; - - if (n1 == null || n2 == null) - return null; - } - - return n1; - } - - private static void setChildren(Node[] all) { - int size = all.length; - int[] nchildren = new int[size]; - for (int i = 0; i < size; i++) - nchildren[i] = 0; - - for (int i = 0; i < size; i++) { - Node p = all[i].parent; - if (p != null) - nchildren[p.block.index]++; - } - - for (int i = 0; i < size; i++) - all[i].children = new Node[nchildren[i]]; - - for (int i = 0; i < size; i++) - nchildren[i] = 0; - - for (int i = 0; i < size; i++) { - Node n = all[i]; - Node p = n.parent; - if (p != null) - p.children[nchildren[p.block.index]++] = n; - } - } - } - - /** - * Represents a catch clause. - */ - public static class Catcher { - private Block node; - private int typeIndex; - - Catcher(BasicBlock.Catch c) { - node = (Block)c.body; - typeIndex = c.typeIndex; - } - - /** - * Returns the first block of the catch clause. - */ - public Block block() { return node; } - - /** - * Returns the name of the exception type that - * this catch clause catches. - */ - public String type() { - if (typeIndex == 0) - return "java.lang.Throwable"; - else - return node.method.getConstPool().getClassInfo(typeIndex); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java deleted file mode 100644 index 76e7e82..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java +++ /dev/null @@ -1,1047 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.Opcode; - -/** - * Executor is responsible for modeling the effects of a JVM instruction on a frame. - * - * @author Jason T. Greene - */ -public class Executor implements Opcode { - private final ConstPool constPool; - private final ClassPool classPool; - private final Type STRING_TYPE; - private final Type CLASS_TYPE; - private final Type THROWABLE_TYPE; - private int lastPos; - - public Executor(ClassPool classPool, ConstPool constPool) { - this.constPool = constPool; - this.classPool = classPool; - - try { - STRING_TYPE = getType("java.lang.String"); - CLASS_TYPE = getType("java.lang.Class"); - THROWABLE_TYPE = getType("java.lang.Throwable"); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - - - /** - * Execute the instruction, modeling the effects on the specified frame and subroutine. - * If a subroutine is passed, the access flags will be modified if this instruction accesses - * the local variable table. - * - * @param method the method containing the instruction - * @param pos the position of the instruction in the method - * @param iter the code iterator used to find the instruction - * @param frame the frame to modify to represent the result of the instruction - * @param subroutine the optional subroutine this instruction belongs to. - * @throws BadBytecode if the bytecode violates the jvm spec - */ - public void execute(MethodInfo method, int pos, CodeIterator iter, Frame frame, Subroutine subroutine) throws BadBytecode { - this.lastPos = pos; - int opcode = iter.byteAt(pos); - - - // Declared opcode in order - switch (opcode) { - case NOP: - break; - case ACONST_NULL: - frame.push(Type.UNINIT); - break; - case ICONST_M1: - case ICONST_0: - case ICONST_1: - case ICONST_2: - case ICONST_3: - case ICONST_4: - case ICONST_5: - frame.push(Type.INTEGER); - break; - case LCONST_0: - case LCONST_1: - frame.push(Type.LONG); - frame.push(Type.TOP); - break; - case FCONST_0: - case FCONST_1: - case FCONST_2: - frame.push(Type.FLOAT); - break; - case DCONST_0: - case DCONST_1: - frame.push(Type.DOUBLE); - frame.push(Type.TOP); - break; - case BIPUSH: - case SIPUSH: - frame.push(Type.INTEGER); - break; - case LDC: - evalLDC(iter.byteAt(pos + 1), frame); - break; - case LDC_W : - case LDC2_W : - evalLDC(iter.u16bitAt(pos + 1), frame); - break; - case ILOAD: - evalLoad(Type.INTEGER, iter.byteAt(pos + 1), frame, subroutine); - break; - case LLOAD: - evalLoad(Type.LONG, iter.byteAt(pos + 1), frame, subroutine); - break; - case FLOAD: - evalLoad(Type.FLOAT, iter.byteAt(pos + 1), frame, subroutine); - break; - case DLOAD: - evalLoad(Type.DOUBLE, iter.byteAt(pos + 1), frame, subroutine); - break; - case ALOAD: - evalLoad(Type.OBJECT, iter.byteAt(pos + 1), frame, subroutine); - break; - case ILOAD_0: - case ILOAD_1: - case ILOAD_2: - case ILOAD_3: - evalLoad(Type.INTEGER, opcode - ILOAD_0, frame, subroutine); - break; - case LLOAD_0: - case LLOAD_1: - case LLOAD_2: - case LLOAD_3: - evalLoad(Type.LONG, opcode - LLOAD_0, frame, subroutine); - break; - case FLOAD_0: - case FLOAD_1: - case FLOAD_2: - case FLOAD_3: - evalLoad(Type.FLOAT, opcode - FLOAD_0, frame, subroutine); - break; - case DLOAD_0: - case DLOAD_1: - case DLOAD_2: - case DLOAD_3: - evalLoad(Type.DOUBLE, opcode - DLOAD_0, frame, subroutine); - break; - case ALOAD_0: - case ALOAD_1: - case ALOAD_2: - case ALOAD_3: - evalLoad(Type.OBJECT, opcode - ALOAD_0, frame, subroutine); - break; - case IALOAD: - evalArrayLoad(Type.INTEGER, frame); - break; - case LALOAD: - evalArrayLoad(Type.LONG, frame); - break; - case FALOAD: - evalArrayLoad(Type.FLOAT, frame); - break; - case DALOAD: - evalArrayLoad(Type.DOUBLE, frame); - break; - case AALOAD: - evalArrayLoad(Type.OBJECT, frame); - break; - case BALOAD: - case CALOAD: - case SALOAD: - evalArrayLoad(Type.INTEGER, frame); - break; - case ISTORE: - evalStore(Type.INTEGER, iter.byteAt(pos + 1), frame, subroutine); - break; - case LSTORE: - evalStore(Type.LONG, iter.byteAt(pos + 1), frame, subroutine); - break; - case FSTORE: - evalStore(Type.FLOAT, iter.byteAt(pos + 1), frame, subroutine); - break; - case DSTORE: - evalStore(Type.DOUBLE, iter.byteAt(pos + 1), frame, subroutine); - break; - case ASTORE: - evalStore(Type.OBJECT, iter.byteAt(pos + 1), frame, subroutine); - break; - case ISTORE_0: - case ISTORE_1: - case ISTORE_2: - case ISTORE_3: - evalStore(Type.INTEGER, opcode - ISTORE_0, frame, subroutine); - break; - case LSTORE_0: - case LSTORE_1: - case LSTORE_2: - case LSTORE_3: - evalStore(Type.LONG, opcode - LSTORE_0, frame, subroutine); - break; - case FSTORE_0: - case FSTORE_1: - case FSTORE_2: - case FSTORE_3: - evalStore(Type.FLOAT, opcode - FSTORE_0, frame, subroutine); - break; - case DSTORE_0: - case DSTORE_1: - case DSTORE_2: - case DSTORE_3: - evalStore(Type.DOUBLE, opcode - DSTORE_0, frame, subroutine); - break; - case ASTORE_0: - case ASTORE_1: - case ASTORE_2: - case ASTORE_3: - evalStore(Type.OBJECT, opcode - ASTORE_0, frame, subroutine); - break; - case IASTORE: - evalArrayStore(Type.INTEGER, frame); - break; - case LASTORE: - evalArrayStore(Type.LONG, frame); - break; - case FASTORE: - evalArrayStore(Type.FLOAT, frame); - break; - case DASTORE: - evalArrayStore(Type.DOUBLE, frame); - break; - case AASTORE: - evalArrayStore(Type.OBJECT, frame); - break; - case BASTORE: - case CASTORE: - case SASTORE: - evalArrayStore(Type.INTEGER, frame); - break; - case POP: - if (frame.pop() == Type.TOP) - throw new BadBytecode("POP can not be used with a category 2 value, pos = " + pos); - break; - case POP2: - frame.pop(); - frame.pop(); - break; - case DUP: { - Type type = frame.peek(); - if (type == Type.TOP) - throw new BadBytecode("DUP can not be used with a category 2 value, pos = " + pos); - - frame.push(frame.peek()); - break; - } - case DUP_X1: - case DUP_X2: { - Type type = frame.peek(); - if (type == Type.TOP) - throw new BadBytecode("DUP can not be used with a category 2 value, pos = " + pos); - int end = frame.getTopIndex(); - int insert = end - (opcode - DUP_X1) - 1; - frame.push(type); - - while (end > insert) { - frame.setStack(end, frame.getStack(end - 1)); - end--; - } - frame.setStack(insert, type); - break; - } - case DUP2: - frame.push(frame.getStack(frame.getTopIndex() - 1)); - frame.push(frame.getStack(frame.getTopIndex() - 1)); - break; - case DUP2_X1: - case DUP2_X2: { - int end = frame.getTopIndex(); - int insert = end - (opcode - DUP2_X1) - 1; - Type type1 = frame.getStack(frame.getTopIndex() - 1); - Type type2 = frame.peek(); - frame.push(type1); - frame.push(type2); - while (end > insert) { - frame.setStack(end, frame.getStack(end - 2)); - end--; - } - frame.setStack(insert, type2); - frame.setStack(insert - 1, type1); - break; - } - case SWAP: { - Type type1 = frame.pop(); - Type type2 = frame.pop(); - if (type1.getSize() == 2 || type2.getSize() == 2) - throw new BadBytecode("Swap can not be used with category 2 values, pos = " + pos); - frame.push(type1); - frame.push(type2); - break; - } - - // Math - case IADD: - evalBinaryMath(Type.INTEGER, frame); - break; - case LADD: - evalBinaryMath(Type.LONG, frame); - break; - case FADD: - evalBinaryMath(Type.FLOAT, frame); - break; - case DADD: - evalBinaryMath(Type.DOUBLE, frame); - break; - case ISUB: - evalBinaryMath(Type.INTEGER, frame); - break; - case LSUB: - evalBinaryMath(Type.LONG, frame); - break; - case FSUB: - evalBinaryMath(Type.FLOAT, frame); - break; - case DSUB: - evalBinaryMath(Type.DOUBLE, frame); - break; - case IMUL: - evalBinaryMath(Type.INTEGER, frame); - break; - case LMUL: - evalBinaryMath(Type.LONG, frame); - break; - case FMUL: - evalBinaryMath(Type.FLOAT, frame); - break; - case DMUL: - evalBinaryMath(Type.DOUBLE, frame); - break; - case IDIV: - evalBinaryMath(Type.INTEGER, frame); - break; - case LDIV: - evalBinaryMath(Type.LONG, frame); - break; - case FDIV: - evalBinaryMath(Type.FLOAT, frame); - break; - case DDIV: - evalBinaryMath(Type.DOUBLE, frame); - break; - case IREM: - evalBinaryMath(Type.INTEGER, frame); - break; - case LREM: - evalBinaryMath(Type.LONG, frame); - break; - case FREM: - evalBinaryMath(Type.FLOAT, frame); - break; - case DREM: - evalBinaryMath(Type.DOUBLE, frame); - break; - - // Unary - case INEG: - verifyAssignable(Type.INTEGER, simplePeek(frame)); - break; - case LNEG: - verifyAssignable(Type.LONG, simplePeek(frame)); - break; - case FNEG: - verifyAssignable(Type.FLOAT, simplePeek(frame)); - break; - case DNEG: - verifyAssignable(Type.DOUBLE, simplePeek(frame)); - break; - - // Shifts - case ISHL: - evalShift(Type.INTEGER, frame); - break; - case LSHL: - evalShift(Type.LONG, frame); - break; - case ISHR: - evalShift(Type.INTEGER, frame); - break; - case LSHR: - evalShift(Type.LONG, frame); - break; - case IUSHR: - evalShift(Type.INTEGER,frame); - break; - case LUSHR: - evalShift(Type.LONG, frame); - break; - - // Bitwise Math - case IAND: - evalBinaryMath(Type.INTEGER, frame); - break; - case LAND: - evalBinaryMath(Type.LONG, frame); - break; - case IOR: - evalBinaryMath(Type.INTEGER, frame); - break; - case LOR: - evalBinaryMath(Type.LONG, frame); - break; - case IXOR: - evalBinaryMath(Type.INTEGER, frame); - break; - case LXOR: - evalBinaryMath(Type.LONG, frame); - break; - - case IINC: { - int index = iter.byteAt(pos + 1); - verifyAssignable(Type.INTEGER, frame.getLocal(index)); - access(index, Type.INTEGER, subroutine); - break; - } - - // Conversion - case I2L: - verifyAssignable(Type.INTEGER, simplePop(frame)); - simplePush(Type.LONG, frame); - break; - case I2F: - verifyAssignable(Type.INTEGER, simplePop(frame)); - simplePush(Type.FLOAT, frame); - break; - case I2D: - verifyAssignable(Type.INTEGER, simplePop(frame)); - simplePush(Type.DOUBLE, frame); - break; - case L2I: - verifyAssignable(Type.LONG, simplePop(frame)); - simplePush(Type.INTEGER, frame); - break; - case L2F: - verifyAssignable(Type.LONG, simplePop(frame)); - simplePush(Type.FLOAT, frame); - break; - case L2D: - verifyAssignable(Type.LONG, simplePop(frame)); - simplePush(Type.DOUBLE, frame); - break; - case F2I: - verifyAssignable(Type.FLOAT, simplePop(frame)); - simplePush(Type.INTEGER, frame); - break; - case F2L: - verifyAssignable(Type.FLOAT, simplePop(frame)); - simplePush(Type.LONG, frame); - break; - case F2D: - verifyAssignable(Type.FLOAT, simplePop(frame)); - simplePush(Type.DOUBLE, frame); - break; - case D2I: - verifyAssignable(Type.DOUBLE, simplePop(frame)); - simplePush(Type.INTEGER, frame); - break; - case D2L: - verifyAssignable(Type.DOUBLE, simplePop(frame)); - simplePush(Type.LONG, frame); - break; - case D2F: - verifyAssignable(Type.DOUBLE, simplePop(frame)); - simplePush(Type.FLOAT, frame); - break; - case I2B: - case I2C: - case I2S: - verifyAssignable(Type.INTEGER, frame.peek()); - break; - case LCMP: - verifyAssignable(Type.LONG, simplePop(frame)); - verifyAssignable(Type.LONG, simplePop(frame)); - frame.push(Type.INTEGER); - break; - case FCMPL: - case FCMPG: - verifyAssignable(Type.FLOAT, simplePop(frame)); - verifyAssignable(Type.FLOAT, simplePop(frame)); - frame.push(Type.INTEGER); - break; - case DCMPL: - case DCMPG: - verifyAssignable(Type.DOUBLE, simplePop(frame)); - verifyAssignable(Type.DOUBLE, simplePop(frame)); - frame.push(Type.INTEGER); - break; - - // Control flow - case IFEQ: - case IFNE: - case IFLT: - case IFGE: - case IFGT: - case IFLE: - verifyAssignable(Type.INTEGER, simplePop(frame)); - break; - case IF_ICMPEQ: - case IF_ICMPNE: - case IF_ICMPLT: - case IF_ICMPGE: - case IF_ICMPGT: - case IF_ICMPLE: - verifyAssignable(Type.INTEGER, simplePop(frame)); - verifyAssignable(Type.INTEGER, simplePop(frame)); - break; - case IF_ACMPEQ: - case IF_ACMPNE: - verifyAssignable(Type.OBJECT, simplePop(frame)); - verifyAssignable(Type.OBJECT, simplePop(frame)); - break; - case GOTO: - break; - case JSR: - frame.push(Type.RETURN_ADDRESS); - break; - case RET: - verifyAssignable(Type.RETURN_ADDRESS, frame.getLocal(iter.byteAt(pos + 1))); - break; - case TABLESWITCH: - case LOOKUPSWITCH: - case IRETURN: - verifyAssignable(Type.INTEGER, simplePop(frame)); - break; - case LRETURN: - verifyAssignable(Type.LONG, simplePop(frame)); - break; - case FRETURN: - verifyAssignable(Type.FLOAT, simplePop(frame)); - break; - case DRETURN: - verifyAssignable(Type.DOUBLE, simplePop(frame)); - break; - case ARETURN: - try { - CtClass returnType = Descriptor.getReturnType(method.getDescriptor(), classPool); - verifyAssignable(Type.get(returnType), simplePop(frame)); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - break; - case RETURN: - break; - case GETSTATIC: - evalGetField(opcode, iter.u16bitAt(pos + 1), frame); - break; - case PUTSTATIC: - evalPutField(opcode, iter.u16bitAt(pos + 1), frame); - break; - case GETFIELD: - evalGetField(opcode, iter.u16bitAt(pos + 1), frame); - break; - case PUTFIELD: - evalPutField(opcode, iter.u16bitAt(pos + 1), frame); - break; - case INVOKEVIRTUAL: - case INVOKESPECIAL: - case INVOKESTATIC: - evalInvokeMethod(opcode, iter.u16bitAt(pos + 1), frame); - break; - case INVOKEINTERFACE: - evalInvokeIntfMethod(opcode, iter.u16bitAt(pos + 1), frame); - break; - case INVOKEDYNAMIC: - evalInvokeDynamic(opcode, iter.u16bitAt(pos + 1), frame); - break; - case NEW: - frame.push(resolveClassInfo(constPool.getClassInfo(iter.u16bitAt(pos + 1)))); - break; - case NEWARRAY: - evalNewArray(pos, iter, frame); - break; - case ANEWARRAY: - evalNewObjectArray(pos, iter, frame); - break; - case ARRAYLENGTH: { - Type array = simplePop(frame); - if (! array.isArray() && array != Type.UNINIT) - throw new BadBytecode("Array length passed a non-array [pos = " + pos + "]: " + array); - frame.push(Type.INTEGER); - break; - } - case ATHROW: - verifyAssignable(THROWABLE_TYPE, simplePop(frame)); - break; - case CHECKCAST: - verifyAssignable(Type.OBJECT, simplePop(frame)); - frame.push(typeFromDesc(constPool.getClassInfoByDescriptor(iter.u16bitAt(pos + 1)))); - break; - case INSTANCEOF: - verifyAssignable(Type.OBJECT, simplePop(frame)); - frame.push(Type.INTEGER); - break; - case MONITORENTER: - case MONITOREXIT: - verifyAssignable(Type.OBJECT, simplePop(frame)); - break; - case WIDE: - evalWide(pos, iter, frame, subroutine); - break; - case MULTIANEWARRAY: - evalNewObjectArray(pos, iter, frame); - break; - case IFNULL: - case IFNONNULL: - verifyAssignable(Type.OBJECT, simplePop(frame)); - break; - case GOTO_W: - break; - case JSR_W: - frame.push(Type.RETURN_ADDRESS); - break; - } - } - - private Type zeroExtend(Type type) { - if (type == Type.SHORT || type == Type.BYTE || type == Type.CHAR || type == Type.BOOLEAN) - return Type.INTEGER; - - return type; - } - - private void evalArrayLoad(Type expectedComponent, Frame frame) throws BadBytecode { - Type index = frame.pop(); - Type array = frame.pop(); - - // Special case, an array defined by aconst_null - // TODO - we might need to be more inteligent about this - if (array == Type.UNINIT) { - verifyAssignable(Type.INTEGER, index); - if (expectedComponent == Type.OBJECT) { - simplePush(Type.UNINIT, frame); - } else { - simplePush(expectedComponent, frame); - } - return; - } - - Type component = array.getComponent(); - - if (component == null) - throw new BadBytecode("Not an array! [pos = " + lastPos + "]: " + component); - - component = zeroExtend(component); - - verifyAssignable(expectedComponent, component); - verifyAssignable(Type.INTEGER, index); - simplePush(component, frame); - } - - private void evalArrayStore(Type expectedComponent, Frame frame) throws BadBytecode { - Type value = simplePop(frame); - Type index = frame.pop(); - Type array = frame.pop(); - - if (array == Type.UNINIT) { - verifyAssignable(Type.INTEGER, index); - return; - } - - Type component = array.getComponent(); - - if (component == null) - throw new BadBytecode("Not an array! [pos = " + lastPos + "]: " + component); - - component = zeroExtend(component); - - verifyAssignable(expectedComponent, component); - verifyAssignable(Type.INTEGER, index); - - // This intentionally only checks for Object on aastore - // downconverting of an array (no casts) - // e.g. Object[] blah = new String[]; - // blah[2] = (Object) "test"; - // blah[3] = new Integer(); // compiler doesnt catch it (has legal bytecode), - // // but will throw arraystoreexception - if (expectedComponent == Type.OBJECT) { - verifyAssignable(expectedComponent, value); - } else { - verifyAssignable(component, value); - } - } - - private void evalBinaryMath(Type expected, Frame frame) throws BadBytecode { - Type value2 = simplePop(frame); - Type value1 = simplePop(frame); - - verifyAssignable(expected, value2); - verifyAssignable(expected, value1); - simplePush(value1, frame); - } - - private void evalGetField(int opcode, int index, Frame frame) throws BadBytecode { - String desc = constPool.getFieldrefType(index); - Type type = zeroExtend(typeFromDesc(desc)); - - if (opcode == GETFIELD) { - Type objectType = resolveClassInfo(constPool.getFieldrefClassName(index)); - verifyAssignable(objectType, simplePop(frame)); - } - - simplePush(type, frame); - } - - private void evalInvokeIntfMethod(int opcode, int index, Frame frame) throws BadBytecode { - String desc = constPool.getInterfaceMethodrefType(index); - Type[] types = paramTypesFromDesc(desc); - int i = types.length; - - while (i > 0) - verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); - - String classInfo = constPool.getInterfaceMethodrefClassName(index); - Type objectType = resolveClassInfo(classInfo); - verifyAssignable(objectType, simplePop(frame)); - - Type returnType = returnTypeFromDesc(desc); - if (returnType != Type.VOID) - simplePush(zeroExtend(returnType), frame); - } - - private void evalInvokeMethod(int opcode, int index, Frame frame) throws BadBytecode { - String desc = constPool.getMethodrefType(index); - Type[] types = paramTypesFromDesc(desc); - int i = types.length; - - while (i > 0) - verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); - - if (opcode != INVOKESTATIC) { - Type objectType = resolveClassInfo(constPool.getMethodrefClassName(index)); - verifyAssignable(objectType, simplePop(frame)); - } - - Type returnType = returnTypeFromDesc(desc); - if (returnType != Type.VOID) - simplePush(zeroExtend(returnType), frame); - } - - private void evalInvokeDynamic(int opcode, int index, Frame frame) throws BadBytecode { - String desc = constPool.getInvokeDynamicType(index); - Type[] types = paramTypesFromDesc(desc); - int i = types.length; - - while (i > 0) - verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); - - // simplePop(frame); // assume CosntPool#REF_invokeStatic - - Type returnType = returnTypeFromDesc(desc); - if (returnType != Type.VOID) - simplePush(zeroExtend(returnType), frame); - } - - private void evalLDC(int index, Frame frame) throws BadBytecode { - int tag = constPool.getTag(index); - Type type; - switch (tag) { - case ConstPool.CONST_String: - type = STRING_TYPE; - break; - case ConstPool.CONST_Integer: - type = Type.INTEGER; - break; - case ConstPool.CONST_Float: - type = Type.FLOAT; - break; - case ConstPool.CONST_Long: - type = Type.LONG; - break; - case ConstPool.CONST_Double: - type = Type.DOUBLE; - break; - case ConstPool.CONST_Class: - type = CLASS_TYPE; - break; - default: - throw new BadBytecode("bad LDC [pos = " + lastPos + "]: " + tag); - } - - simplePush(type, frame); - } - - private void evalLoad(Type expected, int index, Frame frame, Subroutine subroutine) throws BadBytecode { - Type type = frame.getLocal(index); - - verifyAssignable(expected, type); - - simplePush(type, frame); - access(index, type, subroutine); - } - - private void evalNewArray(int pos, CodeIterator iter, Frame frame) throws BadBytecode { - verifyAssignable(Type.INTEGER, simplePop(frame)); - Type type = null; - int typeInfo = iter.byteAt(pos + 1); - switch (typeInfo) { - case T_BOOLEAN: - type = getType("boolean[]"); - break; - case T_CHAR: - type = getType("char[]"); - break; - case T_BYTE: - type = getType("byte[]"); - break; - case T_SHORT: - type = getType("short[]"); - break; - case T_INT: - type = getType("int[]"); - break; - case T_LONG: - type = getType("long[]"); - break; - case T_FLOAT: - type = getType("float[]"); - break; - case T_DOUBLE: - type = getType("double[]"); - break; - default: - throw new BadBytecode("Invalid array type [pos = " + pos + "]: " + typeInfo); - - } - - frame.push(type); - } - - private void evalNewObjectArray(int pos, CodeIterator iter, Frame frame) throws BadBytecode { - // Convert to x[] format - Type type = resolveClassInfo(constPool.getClassInfo(iter.u16bitAt(pos + 1))); - String name = type.getCtClass().getName(); - int opcode = iter.byteAt(pos); - int dimensions; - - if (opcode == MULTIANEWARRAY) { - dimensions = iter.byteAt(pos + 3); - } else { - name = name + "[]"; - dimensions = 1; - } - - while (dimensions-- > 0) { - verifyAssignable(Type.INTEGER, simplePop(frame)); - } - - simplePush(getType(name), frame); - } - - private void evalPutField(int opcode, int index, Frame frame) throws BadBytecode { - String desc = constPool.getFieldrefType(index); - Type type = zeroExtend(typeFromDesc(desc)); - - verifyAssignable(type, simplePop(frame)); - - if (opcode == PUTFIELD) { - Type objectType = resolveClassInfo(constPool.getFieldrefClassName(index)); - verifyAssignable(objectType, simplePop(frame)); - } - } - - private void evalShift(Type expected, Frame frame) throws BadBytecode { - Type value2 = simplePop(frame); - Type value1 = simplePop(frame); - - verifyAssignable(Type.INTEGER, value2); - verifyAssignable(expected, value1); - simplePush(value1, frame); - } - - private void evalStore(Type expected, int index, Frame frame, Subroutine subroutine) throws BadBytecode { - Type type = simplePop(frame); - - // RETURN_ADDRESS is allowed by ASTORE - if (! (expected == Type.OBJECT && type == Type.RETURN_ADDRESS)) - verifyAssignable(expected, type); - simpleSetLocal(index, type, frame); - access(index, type, subroutine); - } - - private void evalWide(int pos, CodeIterator iter, Frame frame, Subroutine subroutine) throws BadBytecode { - int opcode = iter.byteAt(pos + 1); - int index = iter.u16bitAt(pos + 2); - switch (opcode) { - case ILOAD: - evalLoad(Type.INTEGER, index, frame, subroutine); - break; - case LLOAD: - evalLoad(Type.LONG, index, frame, subroutine); - break; - case FLOAD: - evalLoad(Type.FLOAT, index, frame, subroutine); - break; - case DLOAD: - evalLoad(Type.DOUBLE, index, frame, subroutine); - break; - case ALOAD: - evalLoad(Type.OBJECT, index, frame, subroutine); - break; - case ISTORE: - evalStore(Type.INTEGER, index, frame, subroutine); - break; - case LSTORE: - evalStore(Type.LONG, index, frame, subroutine); - break; - case FSTORE: - evalStore(Type.FLOAT, index, frame, subroutine); - break; - case DSTORE: - evalStore(Type.DOUBLE, index, frame, subroutine); - break; - case ASTORE: - evalStore(Type.OBJECT, index, frame, subroutine); - break; - case IINC: - verifyAssignable(Type.INTEGER, frame.getLocal(index)); - break; - case RET: - verifyAssignable(Type.RETURN_ADDRESS, frame.getLocal(index)); - break; - default: - throw new BadBytecode("Invalid WIDE operand [pos = " + pos + "]: " + opcode); - } - - } - - private Type getType(String name) throws BadBytecode { - try { - return Type.get(classPool.get(name)); - } catch (NotFoundException e) { - throw new BadBytecode("Could not find class [pos = " + lastPos + "]: " + name); - } - } - - private Type[] paramTypesFromDesc(String desc) throws BadBytecode { - CtClass classes[] = null; - try { - classes = Descriptor.getParameterTypes(desc, classPool); - } catch (NotFoundException e) { - throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); - } - - if (classes == null) - throw new BadBytecode("Could not obtain parameters for descriptor [pos = " + lastPos + "]: " + desc); - - Type[] types = new Type[classes.length]; - for (int i = 0; i < types.length; i++) - types[i] = Type.get(classes[i]); - - return types; - } - - private Type returnTypeFromDesc(String desc) throws BadBytecode { - CtClass clazz = null; - try { - clazz = Descriptor.getReturnType(desc, classPool); - } catch (NotFoundException e) { - throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); - } - - if (clazz == null) - throw new BadBytecode("Could not obtain return type for descriptor [pos = " + lastPos + "]: " + desc); - - return Type.get(clazz); - } - - private Type simplePeek(Frame frame) { - Type type = frame.peek(); - return (type == Type.TOP) ? frame.getStack(frame.getTopIndex() - 1) : type; - } - - private Type simplePop(Frame frame) { - Type type = frame.pop(); - return (type == Type.TOP) ? frame.pop() : type; - } - - private void simplePush(Type type, Frame frame) { - frame.push(type); - if (type.getSize() == 2) - frame.push(Type.TOP); - } - - private void access(int index, Type type, Subroutine subroutine) { - if (subroutine == null) - return; - subroutine.access(index); - if (type.getSize() == 2) - subroutine.access(index + 1); - } - - private void simpleSetLocal(int index, Type type, Frame frame) { - frame.setLocal(index, type); - if (type.getSize() == 2) - frame.setLocal(index + 1, Type.TOP); - } - - private Type resolveClassInfo(String info) throws BadBytecode { - CtClass clazz = null; - try { - if (info.charAt(0) == '[') { - clazz = Descriptor.toCtClass(info, classPool); - } else { - clazz = classPool.get(info); - } - - } catch (NotFoundException e) { - throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); - } - - if (clazz == null) - throw new BadBytecode("Could not obtain type for descriptor [pos = " + lastPos + "]: " + info); - - return Type.get(clazz); - } - - private Type typeFromDesc(String desc) throws BadBytecode { - CtClass clazz = null; - try { - clazz = Descriptor.toCtClass(desc, classPool); - } catch (NotFoundException e) { - throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); - } - - if (clazz == null) - throw new BadBytecode("Could not obtain type for descriptor [pos = " + lastPos + "]: " + desc); - - return Type.get(clazz); - } - - private void verifyAssignable(Type expected, Type type) throws BadBytecode { - if (! expected.isAssignableFrom(type)) - throw new BadBytecode("Expected type: " + expected + " Got: " + type + " [pos = " + lastPos + "]"); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java deleted file mode 100644 index 10e87db..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java +++ /dev/null @@ -1,289 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - - -/** - * Represents the stack frame and local variable table at a particular point in time. - * - * @author Jason T. Greene - */ -public class Frame { - private Type[] locals; - private Type[] stack; - private int top; - private boolean jsrMerged; - private boolean retMerged; - - /** - * Create a new frame with the specified local variable table size, and max stack size - * - * @param locals the number of local variable table entries - * @param stack the maximum stack size - */ - public Frame(int locals, int stack) { - this.locals = new Type[locals]; - this.stack = new Type[stack]; - } - - /** - * Returns the local varaible table entry at index. - * - * @param index the position in the table - * @return the type if one exists, or null if the position is empty - */ - public Type getLocal(int index) { - return locals[index]; - } - - /** - * Sets the local variable table entry at index to a type. - * - * @param index the position in the table - * @param type the type to set at the position - */ - public void setLocal(int index, Type type) { - locals[index] = type; - } - - - /** - * Returns the type on the stack at the specified index. - * - * @param index the position on the stack - * @return the type of the stack position - */ - public Type getStack(int index) { - return stack[index]; - } - - /** - * Sets the type of the stack position - * - * @param index the position on the stack - * @param type the type to set - */ - public void setStack(int index, Type type) { - stack[index] = type; - } - - /** - * Empties the stack - */ - public void clearStack() { - top = 0; - } - - /** - * Gets the index of the type sitting at the top of the stack. - * This is not to be confused with a length operation which - * would return the number of elements, not the position of - * the last element. - * - * @return the position of the element at the top of the stack - */ - public int getTopIndex() { - return top - 1; - } - - /** - * Returns the number of local variable table entries, specified - * at construction. - * - * @return the number of local variable table entries - */ - public int localsLength() { - return locals.length; - } - - /** - * Gets the top of the stack without altering it - * - * @return the top of the stack - */ - public Type peek() { - if (top < 1) - throw new IndexOutOfBoundsException("Stack is empty"); - - return stack[top - 1]; - } - - /** - * Alters the stack to contain one less element and return it. - * - * @return the element popped from the stack - */ - public Type pop() { - if (top < 1) - throw new IndexOutOfBoundsException("Stack is empty"); - return stack[--top]; - } - - /** - * Alters the stack by placing the passed type on the top - * - * @param type the type to add to the top - */ - public void push(Type type) { - stack[top++] = type; - } - - - /** - * Makes a shallow copy of this frame, i.e. the type instances will - * remain the same. - * - * @return the shallow copy - */ - public Frame copy() { - Frame frame = new Frame(locals.length, stack.length); - System.arraycopy(locals, 0, frame.locals, 0, locals.length); - System.arraycopy(stack, 0, frame.stack, 0, stack.length); - frame.top = top; - return frame; - } - - /** - * Makes a shallow copy of the stack portion of this frame. The local - * variable table size will be copied, but its contents will be empty. - * - * @return the shallow copy of the stack - */ - public Frame copyStack() { - Frame frame = new Frame(locals.length, stack.length); - System.arraycopy(stack, 0, frame.stack, 0, stack.length); - frame.top = top; - return frame; - } - - /** - * Merges all types on the stack of this frame instance with that of the specified frame. - * The local variable table is left untouched. - * - * @param frame the frame to merge the stack from - * @return true if any changes where made - */ - public boolean mergeStack(Frame frame) { - boolean changed = false; - if (top != frame.top) - throw new RuntimeException("Operand stacks could not be merged, they are different sizes!"); - - for (int i = 0; i < top; i++) { - if (stack[i] != null) { - Type prev = stack[i]; - Type merged = prev.merge(frame.stack[i]); - if (merged == Type.BOGUS) - throw new RuntimeException("Operand stacks could not be merged due to differing primitive types: pos = " + i); - - stack[i] = merged; - // always replace the instance in case a multi-interface type changes to a normal Type - if ((! merged.equals(prev)) || merged.popChanged()) { - changed = true; - } - } - } - - return changed; - } - - /** - * Merges all types on the stack and local variable table of this frame with that of the specified - * type. - * - * @param frame the frame to merge with - * @return true if any changes to this frame where made by this merge - */ - public boolean merge(Frame frame) { - boolean changed = false; - - // Local variable table - for (int i = 0; i < locals.length; i++) { - if (locals[i] != null) { - Type prev = locals[i]; - Type merged = prev.merge(frame.locals[i]); - // always replace the instance in case a multi-interface type changes to a normal Type - locals[i] = merged; - if (! merged.equals(prev) || merged.popChanged()) { - changed = true; - } - } else if (frame.locals[i] != null) { - locals[i] = frame.locals[i]; - changed = true; - } - } - - changed |= mergeStack(frame); - return changed; - } - - public String toString() { - StringBuffer buffer = new StringBuffer(); - - buffer.append("locals = ["); - for (int i = 0; i < locals.length; i++) { - buffer.append(locals[i] == null ? "empty" : locals[i].toString()); - if (i < locals.length - 1) - buffer.append(", "); - } - buffer.append("] stack = ["); - for (int i = 0; i < top; i++) { - buffer.append(stack[i]); - if (i < top - 1) - buffer.append(", "); - } - buffer.append("]"); - - return buffer.toString(); - } - - /** - * Whether or not state from the source JSR instruction has been merged - * - * @return true if JSR state has been merged - */ - boolean isJsrMerged() { - return jsrMerged; - } - - /** - * Sets whether of not the state from the source JSR instruction has been merged - * - * @param jsrMerged true if merged, otherwise false - */ - void setJsrMerged(boolean jsrMerged) { - this.jsrMerged = jsrMerged; - } - - /** - * Whether or not state from the RET instruction, of the subroutine that was jumped - * to has been merged. - * - * @return true if RET state has been merged - */ - boolean isRetMerged() { - return retMerged; - } - - /** - * Sets whether or not state from the RET instruction, of the subroutine that was jumped - * to has been merged. - * - * @param retMerged true if RET state has been merged - */ - void setRetMerged(boolean retMerged) { - this.retMerged = retMerged; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java deleted file mode 100644 index 84bd21c..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java +++ /dev/null @@ -1,148 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.io.PrintStream; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.InstructionPrinter; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; - -/** - * A utility class for printing a merged view of the frame state and the - * instructions of a method. - * - * @author Jason T. Greene - */ -public final class FramePrinter { - private final PrintStream stream; - - /** - * Constructs a bytecode printer. - */ - public FramePrinter(PrintStream stream) { - this.stream = stream; - } - - /** - * Prints all the methods declared in the given class. - */ - public static void print(CtClass clazz, PrintStream stream) { - (new FramePrinter(stream)).print(clazz); - } - - /** - * Prints all the methods declared in the given class. - */ - public void print(CtClass clazz) { - CtMethod[] methods = clazz.getDeclaredMethods(); - for (int i = 0; i < methods.length; i++) { - print(methods[i]); - } - } - - private String getMethodString(CtMethod method) { - try { - return Modifier.toString(method.getModifiers()) + " " - + method.getReturnType().getName() + " " + method.getName() - + Descriptor.toString(method.getSignature()) + ";"; - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - } - - /** - * Prints the instructions and the frame states of the given method. - */ - public void print(CtMethod method) { - stream.println("\n" + getMethodString(method)); - MethodInfo info = method.getMethodInfo2(); - ConstPool pool = info.getConstPool(); - CodeAttribute code = info.getCodeAttribute(); - if (code == null) - return; - - Frame[] frames; - try { - frames = (new Analyzer()).analyze(method.getDeclaringClass(), info); - } catch (BadBytecode e) { - throw new RuntimeException(e); - } - - int spacing = String.valueOf(code.getCodeLength()).length(); - - CodeIterator iterator = code.iterator(); - while (iterator.hasNext()) { - int pos; - try { - pos = iterator.next(); - } catch (BadBytecode e) { - throw new RuntimeException(e); - } - - stream.println(pos + ": " + InstructionPrinter.instructionString(iterator, pos, pool)); - - addSpacing(spacing + 3); - Frame frame = frames[pos]; - if (frame == null) { - stream.println("--DEAD CODE--"); - continue; - } - printStack(frame); - - addSpacing(spacing + 3); - printLocals(frame); - } - - } - - private void printStack(Frame frame) { - stream.print("stack ["); - int top = frame.getTopIndex(); - for (int i = 0; i <= top; i++) { - if (i > 0) - stream.print(", "); - Type type = frame.getStack(i); - stream.print(type); - } - stream.println("]"); - } - - private void printLocals(Frame frame) { - stream.print("locals ["); - int length = frame.localsLength(); - for (int i = 0; i < length; i++) { - if (i > 0) - stream.print(", "); - Type type = frame.getLocal(i); - stream.print(type == null ? "empty" : type.toString()); - } - stream.println("]"); - } - - private void addSpacing(int count) { - while (count-- > 0) - stream.print(' '); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java deleted file mode 100644 index 52e3b53..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java +++ /dev/null @@ -1,57 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.NoSuchElementException; - -class IntQueue { - private static class Entry { - private IntQueue.Entry next; - private int value; - private Entry(int value) { - this.value = value; - } - } - private IntQueue.Entry head; - - private IntQueue.Entry tail; - - void add(int value) { - IntQueue.Entry entry = new Entry(value); - if (tail != null) - tail.next = entry; - tail = entry; - - if (head == null) - head = entry; - } - - boolean isEmpty() { - return head == null; - } - - int take() { - if (head == null) - throw new NoSuchElementException(); - - int value = head.value; - head = head.next; - if (head == null) - tail = null; - - return value; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java deleted file mode 100644 index 8a9eefa..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java +++ /dev/null @@ -1,130 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; - -/** - * Represents an array of {@link MultiType} instances. - * - * @author Jason T. Greene - */ -public class MultiArrayType extends Type { - private MultiType component; - private int dims; - - public MultiArrayType(MultiType component, int dims) { - super(null); - this.component = component; - this.dims = dims; - } - - public CtClass getCtClass() { - CtClass clazz = component.getCtClass(); - if (clazz == null) - return null; - - ClassPool pool = clazz.getClassPool(); - if (pool == null) - pool = ClassPool.getDefault(); - - String name = arrayName(clazz.getName(), dims); - - try { - return pool.get(name); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - } - - boolean popChanged() { - return component.popChanged(); - } - - public int getDimensions() { - return dims; - } - - public Type getComponent() { - return dims == 1 ? (Type)component : new MultiArrayType(component, dims - 1); - } - - public int getSize() { - return 1; - } - - public boolean isArray() { - return true; - } - - public boolean isAssignableFrom(Type type) { - throw new UnsupportedOperationException("Not implemented"); - } - - public boolean isReference() { - return true; - } - - public boolean isAssignableTo(Type type) { - if (eq(type.getCtClass(), Type.OBJECT.getCtClass())) - return true; - - if (eq(type.getCtClass(), Type.CLONEABLE.getCtClass())) - return true; - - if (eq(type.getCtClass(), Type.SERIALIZABLE.getCtClass())) - return true; - - if (! type.isArray()) - return false; - - Type typeRoot = getRootComponent(type); - int typeDims = type.getDimensions(); - - if (typeDims > dims) - return false; - - if (typeDims < dims) { - if (eq(typeRoot.getCtClass(), Type.OBJECT.getCtClass())) - return true; - - if (eq(typeRoot.getCtClass(), Type.CLONEABLE.getCtClass())) - return true; - - if (eq(typeRoot.getCtClass(), Type.SERIALIZABLE.getCtClass())) - return true; - - return false; - } - - return component.isAssignableTo(typeRoot); - } - - public boolean equals(Object o) { - if (! (o instanceof MultiArrayType)) - return false; - MultiArrayType multi = (MultiArrayType)o; - - return component.equals(multi.component) && dims == multi.dims; - } - - public String toString() { - // follows the same detailed formating scheme as component - return arrayName(component.toString(), dims); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java deleted file mode 100644 index 6158535..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java +++ /dev/null @@ -1,314 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.HashMap; -import java.util.Iterator; -import java.util.Map; - -import com.wenshuo.agent.javassist.CtClass; - -/** - * MultiType represents an unresolved type. Whenever two {@code Type} - * instances are merged, if they share more than one super type (either an - * interface or a superclass), then a {@code MultiType} is used to - * represent the possible super types. The goal of a {@code MultiType} - * is to reduce the set of possible types down to a single resolved type. This - * is done by eliminating non-assignable types from the typeset when the - * {@code MultiType} is passed as an argument to - * {@link Type#isAssignableFrom(Type)}, as well as removing non-intersecting - * types during a merge. - * - * Note: Currently the {@code MultiType} instance is reused as much - * as possible so that updates are visible from all frames. In addition, all - * {@code MultiType} merge paths are also updated. This is somewhat - * hackish, but it appears to handle most scenarios. - * - * @author Jason T. Greene - */ - -/* TODO - A better, but more involved, approach would be to track the instruction - * offset that resulted in the creation of this type, and - * whenever the typeset changes, to force a merge on that position. This - * would require creating a new MultiType instance every time the typeset - * changes, and somehow communicating assignment changes to the Analyzer - */ -public class MultiType extends Type { - private Map interfaces; - private Type resolved; - private Type potentialClass; - private MultiType mergeSource; - private boolean changed = false; - - public MultiType(Map interfaces) { - this(interfaces, null); - } - - public MultiType(Map interfaces, Type potentialClass) { - super(null); - this.interfaces = interfaces; - this.potentialClass = potentialClass; - } - - /** - * Gets the class that corresponds with this type. If this information - * is not yet known, java.lang.Object will be returned. - */ - public CtClass getCtClass() { - if (resolved != null) - return resolved.getCtClass(); - - return Type.OBJECT.getCtClass(); - } - - /** - * Always returns null since this type is never used for an array. - */ - public Type getComponent() { - return null; - } - - /** - * Always returns 1, since this type is a reference. - */ - public int getSize() { - return 1; - } - - /** - * Always reutnrs false since this type is never used for an array - */ - public boolean isArray() { - return false; - } - - /** - * Returns true if the internal state has changed. - */ - boolean popChanged() { - boolean changed = this.changed; - this.changed = false; - return changed; - } - - public boolean isAssignableFrom(Type type) { - throw new UnsupportedOperationException("Not implemented"); - } - - public boolean isAssignableTo(Type type) { - if (resolved != null) - return type.isAssignableFrom(resolved); - - if (Type.OBJECT.equals(type)) - return true; - - if (potentialClass != null && !type.isAssignableFrom(potentialClass)) - potentialClass = null; - - Map map = mergeMultiAndSingle(this, type); - - if (map.size() == 1 && potentialClass == null) { - // Update previous merge paths to the same resolved type - resolved = Type.get((CtClass)map.values().iterator().next()); - propogateResolved(); - - return true; - } - - // Keep all previous merge paths up to date - if (map.size() >= 1) { - interfaces = map; - propogateState(); - - return true; - } - - if (potentialClass != null) { - resolved = potentialClass; - propogateResolved(); - - return true; - } - - return false; - } - - private void propogateState() { - MultiType source = mergeSource; - while (source != null) { - source.interfaces = interfaces; - source.potentialClass = potentialClass; - source = source.mergeSource; - } - } - - private void propogateResolved() { - MultiType source = mergeSource; - while (source != null) { - source.resolved = resolved; - source = source.mergeSource; - } - } - - /** - * Always returns true, since this type is always a reference. - * - * @return true - */ - public boolean isReference() { - return true; - } - - private Map getAllMultiInterfaces(MultiType type) { - Map map = new HashMap(); - - Iterator iter = type.interfaces.values().iterator(); - while (iter.hasNext()) { - CtClass intf = (CtClass)iter.next(); - map.put(intf.getName(), intf); - getAllInterfaces(intf, map); - } - - return map; - } - - - private Map mergeMultiInterfaces(MultiType type1, MultiType type2) { - Map map1 = getAllMultiInterfaces(type1); - Map map2 = getAllMultiInterfaces(type2); - - return findCommonInterfaces(map1, map2); - } - - private Map mergeMultiAndSingle(MultiType multi, Type single) { - Map map1 = getAllMultiInterfaces(multi); - Map map2 = getAllInterfaces(single.getCtClass(), null); - - return findCommonInterfaces(map1, map2); - } - - private boolean inMergeSource(MultiType source) { - while (source != null) { - if (source == this) - return true; - - source = source.mergeSource; - } - - return false; - } - - public Type merge(Type type) { - if (this == type) - return this; - - if (type == UNINIT) - return this; - - if (type == BOGUS) - return BOGUS; - - if (type == null) - return this; - - if (resolved != null) - return resolved.merge(type); - - if (potentialClass != null) { - Type mergePotential = potentialClass.merge(type); - if (! mergePotential.equals(potentialClass) || mergePotential.popChanged()) { - potentialClass = Type.OBJECT.equals(mergePotential) ? null : mergePotential; - changed = true; - } - } - - Map merged; - - if (type instanceof MultiType) { - MultiType multi = (MultiType)type; - - if (multi.resolved != null) { - merged = mergeMultiAndSingle(this, multi.resolved); - } else { - merged = mergeMultiInterfaces(multi, this); - if (! inMergeSource(multi)) - mergeSource = multi; - } - } else { - merged = mergeMultiAndSingle(this, type); - } - - // Keep all previous merge paths up to date - if (merged.size() > 1 || (merged.size() == 1 && potentialClass != null)) { - // Check for changes - if (merged.size() != interfaces.size()) { - changed = true; - } else if (changed == false){ - Iterator iter = merged.keySet().iterator(); - while (iter.hasNext()) - if (! interfaces.containsKey(iter.next())) - changed = true; - } - - interfaces = merged; - propogateState(); - - return this; - } - - if (merged.size() == 1) { - resolved = Type.get((CtClass) merged.values().iterator().next()); - } else if (potentialClass != null){ - resolved = potentialClass; - } else { - resolved = OBJECT; - } - - propogateResolved(); - - return resolved; - } - - public boolean equals(Object o) { - if (! (o instanceof MultiType)) - return false; - - MultiType multi = (MultiType) o; - if (resolved != null) - return resolved.equals(multi.resolved); - else if (multi.resolved != null) - return false; - - return interfaces.keySet().equals(multi.interfaces.keySet()); - } - - public String toString() { - if (resolved != null) - return resolved.toString(); - - StringBuffer buffer = new StringBuffer("{"); - Iterator iter = interfaces.keySet().iterator(); - while (iter.hasNext()) { - buffer.append(iter.next()); - buffer.append(", "); - } - buffer.setLength(buffer.length() - 2); - if (potentialClass != null) - buffer.append(", *").append(potentialClass.toString()); - buffer.append("}"); - return buffer.toString(); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java deleted file mode 100644 index 2f6f254..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java +++ /dev/null @@ -1,67 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.ArrayList; -import java.util.Collection; -import java.util.HashSet; -import java.util.List; -import java.util.Set; - -/** - * Represents a nested method subroutine (marked by JSR and RET). - * - * @author Jason T. Greene - */ -public class Subroutine { - //private Set callers = new HashSet(); - private List callers = new ArrayList(); - private Set access = new HashSet(); - private int start; - - public Subroutine(int start, int caller) { - this.start = start; - callers.add(new Integer(caller)); - } - - public void addCaller(int caller) { - callers.add(new Integer(caller)); - } - - public int start() { - return start; - } - - public void access(int index) { - access.add(new Integer(index)); - } - - public boolean isAccessed(int index) { - return access.contains(new Integer(index)); - } - - public Collection accessed() { - return access; - } - - public Collection callers() { - return callers; - } - - public String toString() { - return "start = " + start + " callers = " + callers.toString(); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java deleted file mode 100644 index 2b43955..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.HashMap; -import java.util.HashSet; -import java.util.Map; -import java.util.Set; - -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ExceptionTable; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.Opcode; - -/** - * Discovers the subroutines in a method, and tracks all callers. - * - * @author Jason T. Greene - */ -public class SubroutineScanner implements Opcode { - - private Subroutine[] subroutines; - Map subTable = new HashMap(); - Set done = new HashSet(); - - - public Subroutine[] scan(MethodInfo method) throws BadBytecode { - CodeAttribute code = method.getCodeAttribute(); - CodeIterator iter = code.iterator(); - - subroutines = new Subroutine[code.getCodeLength()]; - subTable.clear(); - done.clear(); - - scan(0, iter, null); - - ExceptionTable exceptions = code.getExceptionTable(); - for (int i = 0; i < exceptions.size(); i++) { - int handler = exceptions.handlerPc(i); - // If an exception is thrown in subroutine, the handler - // is part of the same subroutine. - scan(handler, iter, subroutines[exceptions.startPc(i)]); - } - - return subroutines; - } - - private void scan(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { - // Skip already processed blocks - if (done.contains(new Integer(pos))) - return; - - done.add(new Integer(pos)); - - int old = iter.lookAhead(); - iter.move(pos); - - boolean next; - do { - pos = iter.next(); - next = scanOp(pos, iter, sub) && iter.hasNext(); - } while (next); - - iter.move(old); - } - - private boolean scanOp(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { - subroutines[pos] = sub; - - int opcode = iter.byteAt(pos); - - if (opcode == TABLESWITCH) { - scanTableSwitch(pos, iter, sub); - - return false; - } - - if (opcode == LOOKUPSWITCH) { - scanLookupSwitch(pos, iter, sub); - - return false; - } - - // All forms of return and throw end current code flow - if (Util.isReturn(opcode) || opcode == RET || opcode == ATHROW) - return false; - - if (Util.isJumpInstruction(opcode)) { - int target = Util.getJumpTarget(pos, iter); - if (opcode == JSR || opcode == JSR_W) { - Subroutine s = (Subroutine) subTable.get(new Integer(target)); - if (s == null) { - s = new Subroutine(target, pos); - subTable.put(new Integer(target), s); - scan(target, iter, s); - } else { - s.addCaller(pos); - } - } else { - scan(target, iter, sub); - - // GOTO ends current code flow - if (Util.isGoto(opcode)) - return false; - } - } - - return true; - } - - private void scanLookupSwitch(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { - int index = (pos & ~3) + 4; - // default - scan(pos + iter.s32bitAt(index), iter, sub); - int npairs = iter.s32bitAt(index += 4); - int end = npairs * 8 + (index += 4); - - // skip "match" - for (index += 4; index < end; index += 8) { - int target = iter.s32bitAt(index) + pos; - scan(target, iter, sub); - } - } - - private void scanTableSwitch(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { - // Skip 4 byte alignment padding - int index = (pos & ~3) + 4; - // default - scan(pos + iter.s32bitAt(index), iter, sub); - int low = iter.s32bitAt(index += 4); - int high = iter.s32bitAt(index += 4); - int end = (high - low + 1) * 4 + (index += 4); - - // Offset table - for (; index < end; index += 4) { - int target = iter.s32bitAt(index) + pos; - scan(target, iter, sub); - } - } - - -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Type.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Type.java deleted file mode 100644 index 41b36b3..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Type.java +++ /dev/null @@ -1,593 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import java.util.ArrayList; -import java.util.HashMap; -import java.util.IdentityHashMap; -import java.util.Iterator; -import java.util.Map; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; - -/** - * Represents a JVM type in data-flow analysis. This abstraction is necessary since - * a JVM type not only includes all normal Java types, but also a few special types - * that are used by the JVM internally. See the static field types on this class for - * more info on these special types. - * - * All primitive and special types reuse the same instance, so identity comparison can - * be used when examining them. Normal java types must use {@link #equals(Object)} to - * compare type instances. - * - * In most cases, applications which consume this API, only need to call {@link #getCtClass()} - * to obtain the needed type information. - * - * @author Jason T. Greene - */ -public class Type { - private final CtClass clazz; - private final boolean special; - - private static final Map prims = new IdentityHashMap(); - /** Represents the double primitive type */ - public static final Type DOUBLE = new Type(CtClass.doubleType); - /** Represents the boolean primitive type */ - public static final Type BOOLEAN = new Type(CtClass.booleanType); - /** Represents the long primitive type */ - public static final Type LONG = new Type(CtClass.longType); - /** Represents the char primitive type */ - public static final Type CHAR = new Type(CtClass.charType); - /** Represents the byte primitive type */ - public static final Type BYTE = new Type(CtClass.byteType); - /** Represents the short primitive type */ - public static final Type SHORT = new Type(CtClass.shortType); - /** Represents the integer primitive type */ - public static final Type INTEGER = new Type(CtClass.intType); - /** Represents the float primitive type */ - public static final Type FLOAT = new Type(CtClass.floatType); - /** Represents the void primitive type */ - public static final Type VOID = new Type(CtClass.voidType); - - /** - * Represents an unknown, or null type. This occurs when aconst_null is used. - * It is important not to treat this type as java.lang.Object, since a null can - * be assigned to any reference type. The analyzer will replace these with - * an actual known type if it can be determined by a merged path with known type - * information. If this type is encountered on a frame then it is guaranteed to - * be null, and the type information is simply not available. Any attempts to - * infer the type, without further information from the compiler would be a guess. - */ - public static final Type UNINIT = new Type(null); - - /** - * Represents an internal JVM return address, which is used by the RET - * instruction to return to a JSR that invoked the subroutine. - */ - public static final Type RETURN_ADDRESS = new Type(null, true); - - /** A placeholder used by the analyzer for the second word position of a double-word type */ - public static final Type TOP = new Type(null, true); - - /** - * Represents a non-accessible value. Code cannot access the value this type - * represents. It occurs when bytecode reuses a local variable table - * position with non-mergable types. An example would be compiled code which - * uses the same position for a primitive type in one branch, and a reference type - * in another branch. - */ - public static final Type BOGUS = new Type(null, true); - - /** Represents the java.lang.Object reference type */ - public static final Type OBJECT = lookupType("java.lang.Object"); - /** Represents the java.io.Serializable reference type */ - public static final Type SERIALIZABLE = lookupType("java.io.Serializable"); - /** Represents the java.lang.Coneable reference type */ - public static final Type CLONEABLE = lookupType("java.lang.Cloneable"); - /** Represents the java.lang.Throwable reference type */ - public static final Type THROWABLE = lookupType("java.lang.Throwable"); - - static { - prims.put(CtClass.doubleType, DOUBLE); - prims.put(CtClass.longType, LONG); - prims.put(CtClass.charType, CHAR); - prims.put(CtClass.shortType, SHORT); - prims.put(CtClass.intType, INTEGER); - prims.put(CtClass.floatType, FLOAT); - prims.put(CtClass.byteType, BYTE); - prims.put(CtClass.booleanType, BOOLEAN); - prims.put(CtClass.voidType, VOID); - - } - - /** - * Obtain the Type for a given class. If the class is a primitive, - * the the unique type instance for the primitive will be returned. - * Otherwise a new Type instance representing the class is returned. - * - * @param clazz The java class - * @return a type instance for this class - */ - public static Type get(CtClass clazz) { - Type type = (Type)prims.get(clazz); - return type != null ? type : new Type(clazz); - } - - private static Type lookupType(String name) { - try { - return new Type(ClassPool.getDefault().get(name)); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - } - - Type(CtClass clazz) { - this(clazz, false); - } - - private Type(CtClass clazz, boolean special) { - this.clazz = clazz; - this.special = special; - } - - // Used to indicate a merge internally triggered a change - boolean popChanged() { - return false; - } - - /** - * Gets the word size of this type. Double-word types, such as long and double - * will occupy two positions on the local variable table or stack. - * - * @return the number of words needed to hold this type - */ - public int getSize() { - return clazz == CtClass.doubleType || clazz == CtClass.longType || this == TOP ? 2 : 1; - } - - /** - * Returns the class this type represents. If the type is special, null will be returned. - * - * @return the class for this type, or null if special - */ - public CtClass getCtClass() { - return clazz; - } - - /** - * Returns whether or not this type is a normal java reference, i.e. it is or extends java.lang.Object. - * - * @return true if a java reference, false if a primitive or special - */ - public boolean isReference() { - return !special && (clazz == null || !clazz.isPrimitive()); - } - - /** - * Returns whether or not the type is special. A special type is one that is either used - * for internal tracking, or is only used internally by the JVM. - * - * @return true if special, false if not - */ - public boolean isSpecial() { - return special; - } - - /** - * Returns whether or not this type is an array. - * - * @return true if an array, false if not - */ - public boolean isArray() { - return clazz != null && clazz.isArray(); - } - - /** - * Returns the number of dimensions of this array. If the type is not an - * array zero is returned. - * - * @return zero if not an array, otherwise the number of array dimensions. - */ - public int getDimensions() { - if (!isArray()) return 0; - - String name = clazz.getName(); - int pos = name.length() - 1; - int count = 0; - while (name.charAt(pos) == ']' ) { - pos -= 2; - count++; - } - - return count; - } - - /** - * Returns the array component if this type is an array. If the type - * is not an array null is returned. - * - * @return the array component if an array, otherwise null - */ - public Type getComponent() { - if (this.clazz == null || !this.clazz.isArray()) - return null; - - CtClass component; - try { - component = this.clazz.getComponentType(); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - - Type type = (Type)prims.get(component); - return (type != null) ? type : new Type(component); - } - - /** - * Determines whether this type is assignable, to the passed type. - * A type is assignable to another if it is either the same type, or - * a sub-type. - * - * @param type the type to test assignability to - * @return true if this is assignable to type, otherwise false - */ - public boolean isAssignableFrom(Type type) { - if (this == type) - return true; - - if ((type == UNINIT && isReference()) || this == UNINIT && type.isReference()) - return true; - - if (type instanceof MultiType) - return ((MultiType)type).isAssignableTo(this); - - if (type instanceof MultiArrayType) - return ((MultiArrayType)type).isAssignableTo(this); - - - // Primitives and Special types must be identical - if (clazz == null || clazz.isPrimitive()) - return false; - - try { - return type.clazz.subtypeOf(clazz); - } catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * Finds the common base type, or interface which both this and the specified - * type can be assigned. If there is more than one possible answer, then a {@link MultiType}, - * or a {@link MultiArrayType} is returned. Multi-types have special rules, - * and successive merges and assignment tests on them will alter their internal state, - * as well as other multi-types they have been merged with. This method is used by - * the data-flow analyzer to merge the type state from multiple branches. - * - * @param type the type to merge with - * @return the merged type - */ - public Type merge(Type type) { - if (type == this) - return this; - if (type == null) - return this; - if (type == Type.UNINIT) - return this; - if (this == Type.UNINIT) - return type; - - // Unequal primitives and special types can not be merged - if (! type.isReference() || ! this.isReference()) - return BOGUS; - - // Centralize merging of multi-interface types - if (type instanceof MultiType) - return type.merge(this); - - if (type.isArray() && this.isArray()) - return mergeArray(type); - - try { - return mergeClasses(type); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - } - - Type getRootComponent(Type type) { - while (type.isArray()) - type = type.getComponent(); - - return type; - } - - private Type createArray(Type rootComponent, int dims) { - if (rootComponent instanceof MultiType) - return new MultiArrayType((MultiType) rootComponent, dims); - - String name = arrayName(rootComponent.clazz.getName(), dims); - - Type type; - try { - type = Type.get(getClassPool(rootComponent).get(name)); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - - return type; - } - - String arrayName(String component, int dims) { - // Using char[] since we have no StringBuilder in JDK4, and StringBuffer is slow. - // Although, this is more efficient even if we did have one. - int i = component.length(); - int size = i + dims * 2; - char[] string = new char[size]; - component.getChars(0, i, string, 0); - while (i < size) { - string[i++] = '['; - string[i++] = ']'; - } - component = new String(string); - return component; - } - - private ClassPool getClassPool(Type rootComponent) { - ClassPool pool = rootComponent.clazz.getClassPool(); - return pool != null ? pool : ClassPool.getDefault(); - } - - private Type mergeArray(Type type) { - Type typeRoot = getRootComponent(type); - Type thisRoot = getRootComponent(this); - int typeDims = type.getDimensions(); - int thisDims = this.getDimensions(); - - // Array commponents can be merged when the dimensions are equal - if (typeDims == thisDims) { - Type mergedComponent = thisRoot.merge(typeRoot); - - // If the components can not be merged (a primitive component mixed with a different type) - // then Object is the common type. - if (mergedComponent == Type.BOGUS) - return Type.OBJECT; - - return createArray(mergedComponent, thisDims); - } - - Type targetRoot; - int targetDims; - - if (typeDims < thisDims) { - targetRoot = typeRoot; - targetDims = typeDims; - } else { - targetRoot = thisRoot; - targetDims = thisDims; - } - - // Special case, arrays are cloneable and serializable, so prefer them when dimensions differ - if (eq(CLONEABLE.clazz, targetRoot.clazz) || eq(SERIALIZABLE.clazz, targetRoot.clazz)) - return createArray(targetRoot, targetDims); - - return createArray(OBJECT, targetDims); - } - - private static CtClass findCommonSuperClass(CtClass one, CtClass two) throws NotFoundException { - CtClass deep = one; - CtClass shallow = two; - CtClass backupShallow = shallow; - CtClass backupDeep = deep; - - // Phase 1 - Find the deepest hierarchy, set deep and shallow correctly - for (;;) { - // In case we get lucky, and find a match early - if (eq(deep, shallow) && deep.getSuperclass() != null) - return deep; - - CtClass deepSuper = deep.getSuperclass(); - CtClass shallowSuper = shallow.getSuperclass(); - - if (shallowSuper == null) { - // right, now reset shallow - shallow = backupShallow; - break; - } - - if (deepSuper == null) { - // wrong, swap them, since deep is now useless, its our tmp before we swap it - deep = backupDeep; - backupDeep = backupShallow; - backupShallow = deep; - - deep = shallow; - shallow = backupShallow; - break; - } - - deep = deepSuper; - shallow = shallowSuper; - } - - // Phase 2 - Move deepBackup up by (deep end - deep) - for (;;) { - deep = deep.getSuperclass(); - if (deep == null) - break; - - backupDeep = backupDeep.getSuperclass(); - } - - deep = backupDeep; - - // Phase 3 - The hierarchy positions are now aligned - // The common super class is easy to find now - while (!eq(deep, shallow)) { - deep = deep.getSuperclass(); - shallow = shallow.getSuperclass(); - } - - return deep; - } - - private Type mergeClasses(Type type) throws NotFoundException { - CtClass superClass = findCommonSuperClass(this.clazz, type.clazz); - - // If its Object, then try and find a common interface(s) - if (superClass.getSuperclass() == null) { - Map interfaces = findCommonInterfaces(type); - if (interfaces.size() == 1) - return new Type((CtClass) interfaces.values().iterator().next()); - if (interfaces.size() > 1) - return new MultiType(interfaces); - - // Only Object is in common - return new Type(superClass); - } - - // Check for a common interface that is not on the found supertype - Map commonDeclared = findExclusiveDeclaredInterfaces(type, superClass); - if (commonDeclared.size() > 0) { - return new MultiType(commonDeclared, new Type(superClass)); - } - - return new Type(superClass); - } - - private Map findCommonInterfaces(Type type) { - Map typeMap = getAllInterfaces(type.clazz, null); - Map thisMap = getAllInterfaces(this.clazz, null); - - return findCommonInterfaces(typeMap, thisMap); - } - - private Map findExclusiveDeclaredInterfaces(Type type, CtClass exclude) { - Map typeMap = getDeclaredInterfaces(type.clazz, null); - Map thisMap = getDeclaredInterfaces(this.clazz, null); - Map excludeMap = getAllInterfaces(exclude, null); - - Iterator i = excludeMap.keySet().iterator(); - while (i.hasNext()) { - Object intf = i.next(); - typeMap.remove(intf); - thisMap.remove(intf); - } - - return findCommonInterfaces(typeMap, thisMap); - } - - - Map findCommonInterfaces(Map typeMap, Map alterMap) { - Iterator i = alterMap.keySet().iterator(); - while (i.hasNext()) { - if (! typeMap.containsKey(i.next())) - i.remove(); - } - - // Reduce to subinterfaces - // This does not need to be recursive since we make a copy, - // and that copy contains all super types for the whole hierarchy - i = new ArrayList(alterMap.values()).iterator(); - while (i.hasNext()) { - CtClass intf = (CtClass) i.next(); - CtClass[] interfaces; - try { - interfaces = intf.getInterfaces(); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - - for (int c = 0; c < interfaces.length; c++) - alterMap.remove(interfaces[c].getName()); - } - - return alterMap; - } - - Map getAllInterfaces(CtClass clazz, Map map) { - if (map == null) - map = new HashMap(); - - if (clazz.isInterface()) - map.put(clazz.getName(), clazz); - do { - try { - CtClass[] interfaces = clazz.getInterfaces(); - for (int i = 0; i < interfaces.length; i++) { - CtClass intf = interfaces[i]; - map.put(intf.getName(), intf); - getAllInterfaces(intf, map); - } - - clazz = clazz.getSuperclass(); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - } while (clazz != null); - - return map; - } - - Map getDeclaredInterfaces(CtClass clazz, Map map) { - if (map == null) - map = new HashMap(); - - if (clazz.isInterface()) - map.put(clazz.getName(), clazz); - - CtClass[] interfaces; - try { - interfaces = clazz.getInterfaces(); - } catch (NotFoundException e) { - throw new RuntimeException(e); - } - - for (int i = 0; i < interfaces.length; i++) { - CtClass intf = interfaces[i]; - map.put(intf.getName(), intf); - getDeclaredInterfaces(intf, map); - } - - return map; - } - - public boolean equals(Object o) { - if (! (o instanceof Type)) - return false; - - return o.getClass() == getClass() && eq(clazz, ((Type)o).clazz); - } - - static boolean eq(CtClass one, CtClass two) { - return one == two || (one != null && two != null && one.getName().equals(two.getName())); - } - - public String toString() { - if (this == BOGUS) - return "BOGUS"; - if (this == UNINIT) - return "UNINIT"; - if (this == RETURN_ADDRESS) - return "RETURN ADDRESS"; - if (this == TOP) - return "TOP"; - - return clazz == null ? "null" : clazz.getName(); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/Util.java b/src/com/wenshuo/agent/javassist/bytecode/analysis/Util.java deleted file mode 100644 index e935310..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/Util.java +++ /dev/null @@ -1,48 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.analysis; - -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.Opcode; - -/** - * A set of common utility methods. - * - * @author Jason T. Greene - */ -public class Util implements Opcode { - public static int getJumpTarget(int pos, CodeIterator iter) { - int opcode = iter.byteAt(pos); - pos += (opcode == JSR_W || opcode == GOTO_W) ? iter.s32bitAt(pos + 1) : iter.s16bitAt(pos + 1); - return pos; - } - - public static boolean isJumpInstruction(int opcode) { - return (opcode >= IFEQ && opcode <= JSR) || opcode == IFNULL || opcode == IFNONNULL || opcode == JSR_W || opcode == GOTO_W; - } - - public static boolean isGoto(int opcode) { - return opcode == GOTO || opcode == GOTO_W; - } - - public static boolean isJsr(int opcode) { - return opcode == JSR || opcode == JSR_W; - } - - public static boolean isReturn(int opcode) { - return (opcode >= IRETURN && opcode <= RETURN); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/analysis/package.html b/src/com/wenshuo/agent/javassist/bytecode/analysis/package.html deleted file mode 100644 index ec39a47..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/analysis/package.html +++ /dev/null @@ -1,20 +0,0 @@ - - -Bytecode Analysis API. - -

This package provides an API for performing data-flow analysis on a method's bytecode. -This allows the user to determine the type state of the stack and local variable table -at the start of every instruction. In addition this API can be used to validate -bytecode, find dead bytecode, and identify unnecessary checkcasts. -Look at ControlFlow class first for details. - -

The users of this package must know the specifications of -class file and Java bytecode. For more details, read this book: - -

    Tim Lindholm and Frank Yellin, -"The Java Virtual Machine Specification 2nd Ed.", -Addison-Wesley, 1999. -
- - - diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java deleted file mode 100644 index fa93f9a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java +++ /dev/null @@ -1,348 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.NotFoundException; - -import java.io.IOException; -import java.util.LinkedHashMap; -import java.util.Set; -import java.util.Iterator; - -/** - * The annotation structure. - * - *

An instance of this class is returned by - * getAnnotations() in AnnotationsAttribute - * or in ParameterAnnotationsAttribute. - * - * @see javassist.bytecode.AnnotationsAttribute#getAnnotations() - * @see javassist.bytecode.ParameterAnnotationsAttribute#getAnnotations() - * @see MemberValue - * @see MemberValueVisitor - * @see AnnotationsWriter - * - * @author Bill Burke - * @author Shigeru Chiba - * @author Adrian Brock - */ -public class Annotation { - static class Pair { - int name; - MemberValue value; - } - - ConstPool pool; - int typeIndex; - LinkedHashMap members; // this sould be LinkedHashMap - // but it is not supported by JDK 1.3. - - /** - * Constructs an annotation including no members. A member can be - * later added to the created annotation by addMemberValue(). - * - * @param type the index into the constant pool table. - * the entry at that index must be the - * CONSTANT_Utf8_Info structure - * repreenting the name of the annotation interface type. - * @param cp the constant pool table. - * - * @see #addMemberValue(String, MemberValue) - */ - public Annotation(int type, ConstPool cp) { - pool = cp; - typeIndex = type; - members = null; - } - - /** - * Constructs an annotation including no members. A member can be - * later added to the created annotation by addMemberValue(). - * - * @param typeName the name of the annotation interface type. - * @param cp the constant pool table. - * - * @see #addMemberValue(String, MemberValue) - */ - public Annotation(String typeName, ConstPool cp) { - this(cp.addUtf8Info(Descriptor.of(typeName)), cp); - } - - /** - * Constructs an annotation that can be accessed through the interface - * represented by clazz. The values of the members are - * not specified. - * - * @param cp the constant pool table. - * @param clazz the interface. - * @throws NotFoundException when the clazz is not found - */ - public Annotation(ConstPool cp, CtClass clazz) - throws NotFoundException - { - // todo Enums are not supported right now. - this(cp.addUtf8Info(Descriptor.of(clazz.getName())), cp); - - if (!clazz.isInterface()) - throw new RuntimeException( - "Only interfaces are allowed for Annotation creation."); - - CtMethod methods[] = clazz.getDeclaredMethods(); - if (methods.length > 0) { - members = new LinkedHashMap(); - } - - for (int i = 0; i < methods.length; i++) { - CtClass returnType = methods[i].getReturnType(); - addMemberValue(methods[i].getName(), - createMemberValue(cp, returnType)); - - } - } - - /** - * Makes an instance of MemberValue. - * - * @param cp the constant pool table. - * @param type the type of the member. - * @return the member value - * @throws NotFoundException when the type is not found - */ - public static MemberValue createMemberValue(ConstPool cp, CtClass type) - throws NotFoundException - { - if (type == CtClass.booleanType) - return new BooleanMemberValue(cp); - else if (type == CtClass.byteType) - return new ByteMemberValue(cp); - else if (type == CtClass.charType) - return new CharMemberValue(cp); - else if (type == CtClass.shortType) - return new ShortMemberValue(cp); - else if (type == CtClass.intType) - return new IntegerMemberValue(cp); - else if (type == CtClass.longType) - return new LongMemberValue(cp); - else if (type == CtClass.floatType) - return new FloatMemberValue(cp); - else if (type == CtClass.doubleType) - return new DoubleMemberValue(cp); - else if (type.getName().equals("java.lang.Class")) - return new ClassMemberValue(cp); - else if (type.getName().equals("java.lang.String")) - return new StringMemberValue(cp); - else if (type.isArray()) { - CtClass arrayType = type.getComponentType(); - MemberValue member = createMemberValue(cp, arrayType); - return new ArrayMemberValue(member, cp); - } - else if (type.isInterface()) { - Annotation info = new Annotation(cp, type); - return new AnnotationMemberValue(info, cp); - } - else { - // treat as enum. I know this is not typed, - // but JBoss has an Annotation Compiler for JDK 1.4 - // and I want it to work with that. - Bill Burke - EnumMemberValue emv = new EnumMemberValue(cp); - emv.setType(type.getName()); - return emv; - } - } - - /** - * Adds a new member. - * - * @param nameIndex the index into the constant pool table. - * The entry at that index must be - * a CONSTANT_Utf8_info structure. - * structure representing the member name. - * @param value the member value. - */ - public void addMemberValue(int nameIndex, MemberValue value) { - Pair p = new Pair(); - p.name = nameIndex; - p.value = value; - addMemberValue(p); - } - - /** - * Adds a new member. - * - * @param name the member name. - * @param value the member value. - */ - public void addMemberValue(String name, MemberValue value) { - Pair p = new Pair(); - p.name = pool.addUtf8Info(name); - p.value = value; - if (members == null) - members = new LinkedHashMap(); - - members.put(name, p); - } - - private void addMemberValue(Pair pair) { - String name = pool.getUtf8Info(pair.name); - if (members == null) - members = new LinkedHashMap(); - - members.put(name, pair); - } - - /** - * Returns a string representation of the annotation. - */ - public String toString() { - StringBuffer buf = new StringBuffer("@"); - buf.append(getTypeName()); - if (members != null) { - buf.append("("); - Iterator mit = members.keySet().iterator(); - while (mit.hasNext()) { - String name = (String)mit.next(); - buf.append(name).append("=").append(getMemberValue(name)); - if (mit.hasNext()) - buf.append(", "); - } - buf.append(")"); - } - - return buf.toString(); - } - - /** - * Obtains the name of the annotation type. - * - * @return the type name - */ - public String getTypeName() { - return Descriptor.toClassName(pool.getUtf8Info(typeIndex)); - } - - /** - * Obtains all the member names. - * - * @return null if no members are defined. - */ - public Set getMemberNames() { - if (members == null) - return null; - else - return members.keySet(); - } - - /** - * Obtains the member value with the given name. - * - *

If this annotation does not have a value for the - * specified member, - * this method returns null. It does not return a - * MemberValue with the default value. - * The default value can be obtained from the annotation type. - * - * @param name the member name - * @return null if the member cannot be found or if the value is - * the default value. - * - * @see javassist.bytecode.AnnotationDefaultAttribute - */ - public MemberValue getMemberValue(String name) { - if (members == null) - return null; - else { - Pair p = (Pair)members.get(name); - if (p == null) - return null; - else - return p.value; - } - } - - /** - * Constructs an annotation-type object representing this annotation. - * For example, if this annotation represents @Author, - * this method returns an Author object. - * - * @param cl class loader for loading an annotation type. - * @param cp class pool for obtaining class files. - * @return the annotation - * @throws ClassNotFoundException if the class cannot found. - * @throws NoSuchClassError if the class linkage fails. - */ - public Object toAnnotationType(ClassLoader cl, ClassPool cp) - throws ClassNotFoundException, NoSuchClassError - { - return AnnotationImpl.make(cl, - MemberValue.loadClass(cl, getTypeName()), - cp, this); - } - - /** - * Writes this annotation. - * - * @param writer the output. - * @throws IOException for an error during the write - */ - public void write(AnnotationsWriter writer) throws IOException { - String typeName = pool.getUtf8Info(typeIndex); - if (members == null) { - writer.annotation(typeName, 0); - return; - } - - writer.annotation(typeName, members.size()); - Iterator it = members.values().iterator(); - while (it.hasNext()) { - Pair pair = (Pair)it.next(); - writer.memberValuePair(pair.name); - pair.value.write(writer); - } - } - - /** - * Returns true if the given object represents the same annotation - * as this object. The equality test checks the member values. - */ - public boolean equals(Object obj) { - if (obj == this) - return true; - if (obj == null || obj instanceof Annotation == false) - return false; - - Annotation other = (Annotation) obj; - - if (getTypeName().equals(other.getTypeName()) == false) - return false; - - LinkedHashMap otherMembers = other.members; - if (members == otherMembers) - return true; - else if (members == null) - return otherMembers == null; - else - if (otherMembers == null) - return false; - else - return members.equals(otherMembers); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java deleted file mode 100644 index faf72ad..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java +++ /dev/null @@ -1,305 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import java.lang.reflect.InvocationHandler; -import java.lang.reflect.Method; -import java.lang.reflect.Proxy; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.AnnotationDefaultAttribute; -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; - -/** - * Internal-use only. This is a helper class internally used for implementing - * toAnnotationType() in Annotation. - * - * @author Shigeru Chiba - * @author Bill Burke - * @author Adrian Brock - */ -public class AnnotationImpl implements InvocationHandler { - private static final String JDK_ANNOTATION_CLASS_NAME = "java.lang.annotation.Annotation"; - private static Method JDK_ANNOTATION_TYPE_METHOD = null; - - private Annotation annotation; - private ClassPool pool; - private ClassLoader classLoader; - private transient Class annotationType; - private transient int cachedHashCode = Integer.MIN_VALUE; - - static { - // Try to resolve the JDK annotation type method - try { - Class clazz = Class.forName(JDK_ANNOTATION_CLASS_NAME); - JDK_ANNOTATION_TYPE_METHOD = clazz.getMethod("annotationType", (Class[])null); - } - catch (Exception ignored) { - // Probably not JDK5+ - } - } - - /** - * Constructs an annotation object. - * - * @param cl class loader for obtaining annotation types. - * @param clazz the annotation type. - * @param cp class pool for containing an annotation - * type (or null). - * @param anon the annotation. - * @return the annotation - */ - public static Object make(ClassLoader cl, Class clazz, ClassPool cp, - Annotation anon) { - AnnotationImpl handler = new AnnotationImpl(anon, cp, cl); - return Proxy.newProxyInstance(cl, new Class[] { clazz }, handler); - } - - private AnnotationImpl(Annotation a, ClassPool cp, ClassLoader loader) { - annotation = a; - pool = cp; - classLoader = loader; - } - - /** - * Obtains the name of the annotation type. - * - * @return the type name - */ - public String getTypeName() { - return annotation.getTypeName(); - } - - /** - * Get the annotation type - * - * @return the annotation class - * @throws NoClassDefFoundError when the class could not loaded - */ - private Class getAnnotationType() { - if (annotationType == null) { - String typeName = annotation.getTypeName(); - try { - annotationType = classLoader.loadClass(typeName); - } - catch (ClassNotFoundException e) { - NoClassDefFoundError error = new NoClassDefFoundError("Error loading annotation class: " + typeName); - error.setStackTrace(e.getStackTrace()); - throw error; - } - } - return annotationType; - } - - /** - * Obtains the internal data structure representing the annotation. - * - * @return the annotation - */ - public Annotation getAnnotation() { - return annotation; - } - - /** - * Executes a method invocation on a proxy instance. - * The implementations of toString(), equals(), - * and hashCode() are directly supplied by the - * AnnotationImpl. The annotationType() method - * is also available on the proxy instance. - */ - public Object invoke(Object proxy, Method method, Object[] args) - throws Throwable - { - String name = method.getName(); - if (Object.class == method.getDeclaringClass()) { - if ("equals".equals(name)) { - Object obj = args[0]; - return new Boolean(checkEquals(obj)); - } - else if ("toString".equals(name)) - return annotation.toString(); - else if ("hashCode".equals(name)) - return new Integer(hashCode()); - } - else if ("annotationType".equals(name) - && method.getParameterTypes().length == 0) - return getAnnotationType(); - - MemberValue mv = annotation.getMemberValue(name); - if (mv == null) - return getDefault(name, method); - else - return mv.getValue(classLoader, pool, method); - } - - private Object getDefault(String name, Method method) - throws ClassNotFoundException, RuntimeException - { - String classname = annotation.getTypeName(); - if (pool != null) { - try { - CtClass cc = pool.get(classname); - ClassFile cf = cc.getClassFile2(); - MethodInfo minfo = cf.getMethod(name); - if (minfo != null) { - AnnotationDefaultAttribute ainfo - = (AnnotationDefaultAttribute) - minfo.getAttribute(AnnotationDefaultAttribute.tag); - if (ainfo != null) { - MemberValue mv = ainfo.getDefaultValue(); - return mv.getValue(classLoader, pool, method); - } - } - } - catch (NotFoundException e) { - throw new RuntimeException("cannot find a class file: " - + classname); - } - } - - throw new RuntimeException("no default value: " + classname + "." - + name + "()"); - } - - /** - * Returns a hash code value for this object. - */ - public int hashCode() { - if (cachedHashCode == Integer.MIN_VALUE) { - int hashCode = 0; - - // Load the annotation class - getAnnotationType(); - - Method[] methods = annotationType.getDeclaredMethods(); - for (int i = 0; i < methods.length; ++ i) { - String name = methods[i].getName(); - int valueHashCode = 0; - - // Get the value - MemberValue mv = annotation.getMemberValue(name); - Object value = null; - try { - if (mv != null) - value = mv.getValue(classLoader, pool, methods[i]); - if (value == null) - value = getDefault(name, methods[i]); - } - catch (RuntimeException e) { - throw e; - } - catch (Exception e) { - throw new RuntimeException("Error retrieving value " + name + " for annotation " + annotation.getTypeName(), e); - } - - // Calculate the hash code - if (value != null) { - if (value.getClass().isArray()) - valueHashCode = arrayHashCode(value); - else - valueHashCode = value.hashCode(); - } - hashCode += 127 * name.hashCode() ^ valueHashCode; - } - - cachedHashCode = hashCode; - } - return cachedHashCode; - } - - /** - * Check that another annotation equals ourselves. - * - * @param obj the other annotation - * @return the true when equals false otherwise - * @throws Exception for any problem - */ - private boolean checkEquals(Object obj) throws Exception { - if (obj == null) - return false; - - // Optimization when the other is one of ourselves - if (obj instanceof Proxy) { - InvocationHandler ih = Proxy.getInvocationHandler(obj); - if (ih instanceof AnnotationImpl) { - AnnotationImpl other = (AnnotationImpl) ih; - return annotation.equals(other.annotation); - } - } - - Class otherAnnotationType = (Class) JDK_ANNOTATION_TYPE_METHOD.invoke(obj, (Object[])null); - if (getAnnotationType().equals(otherAnnotationType) == false) - return false; - - Method[] methods = annotationType.getDeclaredMethods(); - for (int i = 0; i < methods.length; ++ i) { - String name = methods[i].getName(); - - // Get the value - MemberValue mv = annotation.getMemberValue(name); - Object value = null; - Object otherValue = null; - try { - if (mv != null) - value = mv.getValue(classLoader, pool, methods[i]); - if (value == null) - value = getDefault(name, methods[i]); - otherValue = methods[i].invoke(obj, (Object[])null); - } - catch (RuntimeException e) { - throw e; - } - catch (Exception e) { - throw new RuntimeException("Error retrieving value " + name + " for annotation " + annotation.getTypeName(), e); - } - - if (value == null && otherValue != null) - return false; - if (value != null && value.equals(otherValue) == false) - return false; - } - - return true; - } - - /** - * Calculates the hashCode of an array using the same - * algorithm as java.util.Arrays.hashCode() - * - * @param object the object - * @return the hashCode - */ - private static int arrayHashCode(Object object) - { - if (object == null) - return 0; - - int result = 1; - - Object[] array = (Object[]) object; - for (int i = 0; i < array.length; ++i) { - int elementHashCode = 0; - if (array[i] != null) - elementHashCode = array[i].hashCode(); - result = 31 * result + elementHashCode; - } - return result; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java deleted file mode 100644 index 09932ec..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Nested annotation. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class AnnotationMemberValue extends MemberValue { - Annotation value; - - /** - * Constructs an annotation member. The initial value is not specified. - */ - public AnnotationMemberValue(ConstPool cp) { - this(null, cp); - } - - /** - * Constructs an annotation member. The initial value is specified by - * the first parameter. - */ - public AnnotationMemberValue(Annotation a, ConstPool cp) { - super('@', cp); - value = a; - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) - throws ClassNotFoundException - { - return AnnotationImpl.make(cl, getType(cl), cp, value); - } - - Class getType(ClassLoader cl) throws ClassNotFoundException { - if (value == null) - throw new ClassNotFoundException("no type specified"); - else - return loadClass(cl, value.getTypeName()); - } - - /** - * Obtains the value. - */ - public Annotation getValue() { - return value; - } - - /** - * Sets the value of this member. - */ - public void setValue(Annotation newValue) { - value = newValue; - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return value.toString(); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.annotationValue(); - value.write(writer); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitAnnotationMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java deleted file mode 100644 index 33beb2d..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java +++ /dev/null @@ -1,354 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import java.io.*; - -import com.wenshuo.agent.javassist.bytecode.ByteArray; -import com.wenshuo.agent.javassist.bytecode.ConstPool; - -/** - * A convenience class for constructing a - * ..Annotations_attribute. - * See the source code of the AnnotationsAttribute.Copier class. - * - *

The following code snippet is an example of use of this class: - * - * 

- * ConstPool pool = ...;
- * output = new ByteArrayOutputStream();
- * writer = new AnnotationsWriter(output, pool);
- *
- * writer.numAnnotations(1);
- * writer.annotation("Author", 2);
- * writer.memberValuePair("name");      // element_value_pair
- * writer.constValueIndex("chiba");
- * writer.memberValuePair("address");   // element_value_pair
- * writer.constValueIndex("tokyo");
- *
- * writer.close();
- * byte[] attribute_info = output.toByteArray();
- * AnnotationsAttribute anno
- *     = new AnnotationsAttribute(pool, AnnotationsAttribute.visibleTag,
- *                                attribute_info);
- *
- * - *

The code snippet above generates the annotation attribute - * corresponding to this annotation: - * - * 

- *  @Author(name = "chiba", address = "tokyo")
- *
- * - * @see javassist.bytecode.AnnotationsAttribute - * @see javassist.bytecode.ParameterAnnotationsAttribute - */ -public class AnnotationsWriter { - protected OutputStream output; - private ConstPool pool; - - /** - * Constructs with the given output stream. - * - * @param os the output stream. - * @param cp the constant pool. - */ - public AnnotationsWriter(OutputStream os, ConstPool cp) { - output = os; - pool = cp; - } - - /** - * Obtains the constant pool given to the constructor. - */ - public ConstPool getConstPool() { - return pool; - } - - /** - * Closes the output stream. - * - */ - public void close() throws IOException { - output.close(); - } - - /** - * Writes num_parameters in - * Runtime(In)VisibleParameterAnnotations_attribute. - * This method must be followed by num calls to - * numAnnotations(). - */ - public void numParameters(int num) throws IOException { - output.write(num); - } - - /** - * Writes num_annotations in - * Runtime(In)VisibleAnnotations_attribute. - * This method must be followed by num calls to - * annotation(). - */ - public void numAnnotations(int num) throws IOException { - write16bit(num); - } - - /** - * Writes annotation. - * This method must be followed by numMemberValuePairs - * calls to memberValuePair(). - * - * @param type the annotation interface name. - * @param numMemberValuePairs num_element_value_pairs - * in annotation. - */ - public void annotation(String type, int numMemberValuePairs) - throws IOException - { - annotation(pool.addUtf8Info(type), numMemberValuePairs); - } - - /** - * Writes annotation. - * This method must be followed by numMemberValuePairs - * calls to memberValuePair(). - * - * @param typeIndex type_index in annotation. - * @param numMemberValuePairs num_element_value_pairs - * in annotation. - */ - public void annotation(int typeIndex, int numMemberValuePairs) - throws IOException - { - write16bit(typeIndex); - write16bit(numMemberValuePairs); - } - - /** - * Writes an element of a element_value_pairs array - * in annotation. - * This method must be followed by a - * call to constValueIndex(), enumConstValue(), - * etc. - * - * @param memberName the element name. - */ - public void memberValuePair(String memberName) throws IOException { - memberValuePair(pool.addUtf8Info(memberName)); - } - - /** - * Writes an element of a element_value_pairs array - * in annotation. - * This method must be followed by a - * call to constValueIndex(), enumConstValue(), - * etc. - * - * @param memberNameIndex element_name_index - * in element_value_pairs array. - */ - public void memberValuePair(int memberNameIndex) throws IOException { - write16bit(memberNameIndex); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(boolean value) throws IOException { - constValueIndex('Z', pool.addIntegerInfo(value ? 1 : 0)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(byte value) throws IOException { - constValueIndex('B', pool.addIntegerInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(char value) throws IOException { - constValueIndex('C', pool.addIntegerInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(short value) throws IOException { - constValueIndex('S', pool.addIntegerInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(int value) throws IOException { - constValueIndex('I', pool.addIntegerInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(long value) throws IOException { - constValueIndex('J', pool.addLongInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(float value) throws IOException { - constValueIndex('F', pool.addFloatInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(double value) throws IOException { - constValueIndex('D', pool.addDoubleInfo(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param value the constant value. - */ - public void constValueIndex(String value) throws IOException { - constValueIndex('s', pool.addUtf8Info(value)); - } - - /** - * Writes tag and const_value_index - * in element_value. - * - * @param tag tag in element_value. - * @param index const_value_index - * in element_value. - */ - public void constValueIndex(int tag, int index) - throws IOException - { - output.write(tag); - write16bit(index); - } - - /** - * Writes tag and enum_const_value - * in element_value. - * - * @param typeName the type name of the enum constant. - * @param constName the simple name of the enum constant. - */ - public void enumConstValue(String typeName, String constName) - throws IOException - { - enumConstValue(pool.addUtf8Info(typeName), - pool.addUtf8Info(constName)); - } - - /** - * Writes tag and enum_const_value - * in element_value. - * - * @param typeNameIndex type_name_index - * in element_value. - * @param constNameIndex const_name_index - * in element_value. - */ - public void enumConstValue(int typeNameIndex, int constNameIndex) - throws IOException - { - output.write('e'); - write16bit(typeNameIndex); - write16bit(constNameIndex); - } - - /** - * Writes tag and class_info_index - * in element_value. - * - * @param name the class name. - */ - public void classInfoIndex(String name) throws IOException { - classInfoIndex(pool.addUtf8Info(name)); - } - - /** - * Writes tag and class_info_index - * in element_value. - * - * @param index class_info_index - */ - public void classInfoIndex(int index) throws IOException { - output.write('c'); - write16bit(index); - } - - /** - * Writes tag and annotation_value - * in element_value. - * This method must be followed by a call to annotation(). - */ - public void annotationValue() throws IOException { - output.write('@'); - } - - /** - * Writes tag and array_value - * in element_value. - * This method must be followed by numValues calls - * to constValueIndex(), enumConstValue(), - * etc. - * - * @param numValues num_values - * in array_value. - */ - public void arrayValue(int numValues) throws IOException { - output.write('['); - write16bit(numValues); - } - - protected void write16bit(int value) throws IOException { - byte[] buf = new byte[2]; - ByteArray.write16bit(value, buf, 0); - output.write(buf); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java deleted file mode 100644 index ff0ab0e..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java +++ /dev/null @@ -1,145 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Array; -import java.lang.reflect.Method; - -/** - * Array member. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class ArrayMemberValue extends MemberValue { - MemberValue type; - MemberValue[] values; - - /** - * Constructs an array. The initial value or type are not specified. - */ - public ArrayMemberValue(ConstPool cp) { - super('[', cp); - type = null; - values = null; - } - - /** - * Constructs an array. The initial value is not specified. - * - * @param t the type of the array elements. - */ - public ArrayMemberValue(MemberValue t, ConstPool cp) { - super('[', cp); - type = t; - values = null; - } - - Object getValue(ClassLoader cl, ClassPool cp, Method method) - throws ClassNotFoundException - { - if (values == null) - throw new ClassNotFoundException( - "no array elements found: " + method.getName()); - - int size = values.length; - Class clazz; - if (type == null) { - clazz = method.getReturnType().getComponentType(); - if (clazz == null || size > 0) - throw new ClassNotFoundException("broken array type: " - + method.getName()); - } - else - clazz = type.getType(cl); - - Object a = Array.newInstance(clazz, size); - for (int i = 0; i < size; i++) - Array.set(a, i, values[i].getValue(cl, cp, method)); - - return a; - } - - Class getType(ClassLoader cl) throws ClassNotFoundException { - if (type == null) - throw new ClassNotFoundException("no array type specified"); - - Object a = Array.newInstance(type.getType(cl), 0); - return a.getClass(); - } - - /** - * Obtains the type of the elements. - * - * @return null if the type is not specified. - */ - public MemberValue getType() { - return type; - } - - /** - * Obtains the elements of the array. - */ - public MemberValue[] getValue() { - return values; - } - - /** - * Sets the elements of the array. - */ - public void setValue(MemberValue[] elements) { - values = elements; - if (elements != null && elements.length > 0) - type = elements[0]; - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - StringBuffer buf = new StringBuffer("{"); - if (values != null) { - for (int i = 0; i < values.length; i++) { - buf.append(values[i].toString()); - if (i + 1 < values.length) - buf.append(", "); - } - } - - buf.append("}"); - return buf.toString(); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - int num = values.length; - writer.arrayValue(num); - for (int i = 0; i < num; ++i) - values[i].write(writer); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitArrayMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java deleted file mode 100644 index c03c2bb..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Boolean constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class BooleanMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a boolean constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Integer_info structure. - */ - public BooleanMemberValue(int index, ConstPool cp) { - super('Z', cp); - this.valueIndex = index; - } - - /** - * Constructs a boolean constant value. - * - * @param b the initial value. - */ - public BooleanMemberValue(boolean b, ConstPool cp) { - super('Z', cp); - setValue(b); - } - - /** - * Constructs a boolean constant value. The initial value is false. - */ - public BooleanMemberValue(ConstPool cp) { - super('Z', cp); - setValue(false); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Boolean(getValue()); - } - - Class getType(ClassLoader cl) { - return boolean.class; - } - - /** - * Obtains the value of the member. - */ - public boolean getValue() { - return cp.getIntegerInfo(valueIndex) != 0; - } - - /** - * Sets the value of the member. - */ - public void setValue(boolean newValue) { - valueIndex = cp.addIntegerInfo(newValue ? 1 : 0); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return getValue() ? "true" : "false"; - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitBooleanMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java deleted file mode 100644 index c26d182..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Byte constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class ByteMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a byte constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Integer_info structure. - */ - public ByteMemberValue(int index, ConstPool cp) { - super('B', cp); - this.valueIndex = index; - } - - /** - * Constructs a byte constant value. - * - * @param b the initial value. - */ - public ByteMemberValue(byte b, ConstPool cp) { - super('B', cp); - setValue(b); - } - - /** - * Constructs a byte constant value. The initial value is 0. - */ - public ByteMemberValue(ConstPool cp) { - super('B', cp); - setValue((byte)0); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Byte(getValue()); - } - - Class getType(ClassLoader cl) { - return byte.class; - } - - /** - * Obtains the value of the member. - */ - public byte getValue() { - return (byte)cp.getIntegerInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(byte newValue) { - valueIndex = cp.addIntegerInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Byte.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitByteMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java deleted file mode 100644 index 9fe9c4a..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Char constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class CharMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a char constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Integer_info structure. - */ - public CharMemberValue(int index, ConstPool cp) { - super('C', cp); - this.valueIndex = index; - } - - /** - * Constructs a char constant value. - * - * @param c the initial value. - */ - public CharMemberValue(char c, ConstPool cp) { - super('C', cp); - setValue(c); - } - - /** - * Constructs a char constant value. The initial value is '\0'. - */ - public CharMemberValue(ConstPool cp) { - super('C', cp); - setValue('\0'); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Character(getValue()); - } - - Class getType(ClassLoader cl) { - return char.class; - } - - /** - * Obtains the value of the member. - */ - public char getValue() { - return (char)cp.getIntegerInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(char newValue) { - valueIndex = cp.addIntegerInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Character.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitCharMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java deleted file mode 100644 index 4b3a697..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java +++ /dev/null @@ -1,140 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.SignatureAttribute; - -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Class value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class ClassMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a class value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Utf8_info structure. - */ - public ClassMemberValue(int index, ConstPool cp) { - super('c', cp); - this.valueIndex = index; - } - - /** - * Constructs a class value. - * - * @param className the initial value. - */ - public ClassMemberValue(String className, ConstPool cp) { - super('c', cp); - setValue(className); - } - - /** - * Constructs a class value. - * The initial value is java.lang.Class. - */ - public ClassMemberValue(ConstPool cp) { - super('c', cp); - setValue("java.lang.Class"); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) - throws ClassNotFoundException { - final String classname = getValue(); - if (classname.equals("void")) - return void.class; - else if (classname.equals("int")) - return int.class; - else if (classname.equals("byte")) - return byte.class; - else if (classname.equals("long")) - return long.class; - else if (classname.equals("double")) - return double.class; - else if (classname.equals("float")) - return float.class; - else if (classname.equals("char")) - return char.class; - else if (classname.equals("short")) - return short.class; - else if (classname.equals("boolean")) - return boolean.class; - else - return loadClass(cl, classname); - } - - Class getType(ClassLoader cl) throws ClassNotFoundException { - return loadClass(cl, "java.lang.Class"); - } - - /** - * Obtains the value of the member. - * - * @return fully-qualified class name. - */ - public String getValue() { - String v = cp.getUtf8Info(valueIndex); - try { - return SignatureAttribute.toTypeSignature(v).jvmTypeName(); - } catch (BadBytecode e) { - throw new RuntimeException(e); - } - } - - /** - * Sets the value of the member. - * - * @param newClassName fully-qualified class name. - */ - public void setValue(String newClassName) { - String setTo = Descriptor.of(newClassName); - valueIndex = cp.addUtf8Info(setTo); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return getValue().replace('$', '.') + ".class"; - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.classInfoIndex(cp.getUtf8Info(valueIndex)); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitClassMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java deleted file mode 100644 index fcfdad0..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Double floating-point number constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - * @version $Revision: 1.7 $ - */ -public class DoubleMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a double constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Double_info structure. - */ - public DoubleMemberValue(int index, ConstPool cp) { - super('D', cp); - this.valueIndex = index; - } - - /** - * Constructs a double constant value. - * - * @param d the initial value. - */ - public DoubleMemberValue(double d, ConstPool cp) { - super('D', cp); - setValue(d); - } - - /** - * Constructs a double constant value. The initial value is 0.0. - */ - public DoubleMemberValue(ConstPool cp) { - super('D', cp); - setValue(0.0); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Double(getValue()); - } - - Class getType(ClassLoader cl) { - return double.class; - } - - /** - * Obtains the value of the member. - */ - public double getValue() { - return cp.getDoubleInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(double newValue) { - valueIndex = cp.addDoubleInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Double.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitDoubleMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java deleted file mode 100644 index fca4034..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java +++ /dev/null @@ -1,126 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import java.io.IOException; -import java.lang.reflect.Method; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; - -/** - * Enum constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class EnumMemberValue extends MemberValue { - int typeIndex, valueIndex; - - /** - * Constructs an enum constant value. The initial value is specified - * by the constant pool entries at the given indexes. - * - * @param type the index of a CONSTANT_Utf8_info structure - * representing the enum type. - * @param value the index of a CONSTANT_Utf8_info structure. - * representing the enum value. - */ - public EnumMemberValue(int type, int value, ConstPool cp) { - super('e', cp); - this.typeIndex = type; - this.valueIndex = value; - } - - /** - * Constructs an enum constant value. - * The initial value is not specified. - */ - public EnumMemberValue(ConstPool cp) { - super('e', cp); - typeIndex = valueIndex = 0; - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) - throws ClassNotFoundException - { - try { - return getType(cl).getField(getValue()).get(null); - } - catch (NoSuchFieldException e) { - throw new ClassNotFoundException(getType() + "." + getValue()); - } - catch (IllegalAccessException e) { - throw new ClassNotFoundException(getType() + "." + getValue()); - } - } - - Class getType(ClassLoader cl) throws ClassNotFoundException { - return loadClass(cl, getType()); - } - - /** - * Obtains the enum type name. - * - * @return a fully-qualified type name. - */ - public String getType() { - return Descriptor.toClassName(cp.getUtf8Info(typeIndex)); - } - - /** - * Changes the enum type name. - * - * @param typename a fully-qualified type name. - */ - public void setType(String typename) { - typeIndex = cp.addUtf8Info(Descriptor.of(typename)); - } - - /** - * Obtains the name of the enum constant value. - */ - public String getValue() { - return cp.getUtf8Info(valueIndex); - } - - /** - * Changes the name of the enum constant value. - */ - public void setValue(String name) { - valueIndex = cp.addUtf8Info(name); - } - - public String toString() { - return getType() + "." + getValue(); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.enumConstValue(cp.getUtf8Info(typeIndex), getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitEnumMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java deleted file mode 100644 index abb5095..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Floating-point number constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - * @version $Revision: 1.7 $ - */ -public class FloatMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a float constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Float_info structure. - */ - public FloatMemberValue(int index, ConstPool cp) { - super('F', cp); - this.valueIndex = index; - } - - /** - * Constructs a float constant value. - * - * @param f the initial value. - */ - public FloatMemberValue(float f, ConstPool cp) { - super('F', cp); - setValue(f); - } - - /** - * Constructs a float constant value. The initial value is 0.0. - */ - public FloatMemberValue(ConstPool cp) { - super('F', cp); - setValue(0.0F); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Float(getValue()); - } - - Class getType(ClassLoader cl) { - return float.class; - } - - /** - * Obtains the value of the member. - */ - public float getValue() { - return cp.getFloatInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(float newValue) { - valueIndex = cp.addFloatInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Float.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitFloatMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java deleted file mode 100644 index a112e4c..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java +++ /dev/null @@ -1,110 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Integer constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class IntegerMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs an int constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Integer_info structure. - */ - public IntegerMemberValue(int index, ConstPool cp) { - super('I', cp); - this.valueIndex = index; - } - - /** - * Constructs an int constant value. - * Note that this constructor receives the initial value - * as the second parameter - * unlike the corresponding constructors in the sibling classes. - * This is for making a difference from the constructor that receives - * an index into the constant pool table as the first parameter. - * Note that the index is also int type. - * - * @param value the initial value. - */ - public IntegerMemberValue(ConstPool cp, int value) { - super('I', cp); - setValue(value); - } - - /** - * Constructs an int constant value. The initial value is 0. - */ - public IntegerMemberValue(ConstPool cp) { - super('I', cp); - setValue(0); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Integer(getValue()); - } - - Class getType(ClassLoader cl) { - return int.class; - } - - /** - * Obtains the value of the member. - */ - public int getValue() { - return cp.getIntegerInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(int newValue) { - valueIndex = cp.addIntegerInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Integer.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitIntegerMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java deleted file mode 100644 index 9be1876..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Long integer constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class LongMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a long constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Long_info structure. - */ - public LongMemberValue(int index, ConstPool cp) { - super('J', cp); - this.valueIndex = index; - } - - /** - * Constructs a long constant value. - * - * @param j the initial value. - */ - public LongMemberValue(long j, ConstPool cp) { - super('J', cp); - setValue(j); - } - - /** - * Constructs a long constant value. The initial value is 0. - */ - public LongMemberValue(ConstPool cp) { - super('J', cp); - setValue(0L); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Long(getValue()); - } - - Class getType(ClassLoader cl) { - return long.class; - } - - /** - * Obtains the value of the member. - */ - public long getValue() { - return cp.getLongInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(long newValue) { - valueIndex = cp.addLongInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Long.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitLongMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java deleted file mode 100644 index fcbd86f..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java +++ /dev/null @@ -1,89 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; - -import java.io.IOException; -import java.lang.reflect.Array; -import java.lang.reflect.Method; - -/** - * The value of a member declared in an annotation. - * - * @see Annotation#getMemberValue(String) - * @author Bill Burke - * @author Shigeru Chiba - */ -public abstract class MemberValue { - ConstPool cp; - char tag; - - MemberValue(char tag, ConstPool cp) { - this.cp = cp; - this.tag = tag; - } - - /** - * Returns the value. If the value type is a primitive type, the - * returned value is boxed. - */ - abstract Object getValue(ClassLoader cl, ClassPool cp, Method m) - throws ClassNotFoundException; - - abstract Class getType(ClassLoader cl) throws ClassNotFoundException; - - static Class loadClass(ClassLoader cl, String classname) - throws ClassNotFoundException, NoSuchClassError - { - try { - return Class.forName(convertFromArray(classname), true, cl); - } - catch (LinkageError e) { - throw new NoSuchClassError(classname, e); - } - } - - private static String convertFromArray(String classname) - { - int index = classname.indexOf("[]"); - if (index != -1) { - String rawType = classname.substring(0, index); - StringBuffer sb = new StringBuffer(Descriptor.of(rawType)); - while (index != -1) { - sb.insert(0, "["); - index = classname.indexOf("[]", index + 1); - } - return sb.toString().replace('/', '.'); - } - return classname; - } - - /** - * Accepts a visitor. - */ - public abstract void accept(MemberValueVisitor visitor); - - /** - * Writes the value. - */ - public abstract void write(AnnotationsWriter w) throws IOException; -} - - diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java deleted file mode 100644 index e20d31e..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -/** - * Visitor for traversing member values included in an annotation. - * - * @see MemberValue#accept(MemberValueVisitor) - * @author Bill Burke - */ -public interface MemberValueVisitor { - public void visitAnnotationMemberValue(AnnotationMemberValue node); - public void visitArrayMemberValue(ArrayMemberValue node); - public void visitBooleanMemberValue(BooleanMemberValue node); - public void visitByteMemberValue(ByteMemberValue node); - public void visitCharMemberValue(CharMemberValue node); - public void visitDoubleMemberValue(DoubleMemberValue node); - public void visitEnumMemberValue(EnumMemberValue node); - public void visitFloatMemberValue(FloatMemberValue node); - public void visitIntegerMemberValue(IntegerMemberValue node); - public void visitLongMemberValue(LongMemberValue node); - public void visitShortMemberValue(ShortMemberValue node); - public void visitStringMemberValue(StringMemberValue node); - public void visitClassMemberValue(ClassMemberValue node); -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java deleted file mode 100644 index 9b99786..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -/** - * Thrown if the linkage fails. - * It keeps the name of the class that caused this error. - */ -public class NoSuchClassError extends Error { - private String className; - - /** - * Constructs an exception. - */ - public NoSuchClassError(String className, Error cause) { - super(cause.toString(), cause); - this.className = className; - } - - /** - * Returns the name of the class not found. - */ - public String getClassName() { - return className; - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java deleted file mode 100644 index 8dd4970..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * Short integer constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class ShortMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a short constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Integer_info structure. - */ - public ShortMemberValue(int index, ConstPool cp) { - super('S', cp); - this.valueIndex = index; - } - - /** - * Constructs a short constant value. - * - * @param s the initial value. - */ - public ShortMemberValue(short s, ConstPool cp) { - super('S', cp); - setValue(s); - } - - /** - * Constructs a short constant value. The initial value is 0. - */ - public ShortMemberValue(ConstPool cp) { - super('S', cp); - setValue((short)0); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return new Short(getValue()); - } - - Class getType(ClassLoader cl) { - return short.class; - } - - /** - * Obtains the value of the member. - */ - public short getValue() { - return (short)cp.getIntegerInfo(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(short newValue) { - valueIndex = cp.addIntegerInfo(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return Short.toString(getValue()); - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitShortMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java deleted file mode 100644 index 61ac276..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 2004 Bill Burke. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.annotation; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import java.io.IOException; -import java.lang.reflect.Method; - -/** - * String constant value. - * - * @author Bill Burke - * @author Shigeru Chiba - */ -public class StringMemberValue extends MemberValue { - int valueIndex; - - /** - * Constructs a string constant value. The initial value is specified - * by the constant pool entry at the given index. - * - * @param index the index of a CONSTANT_Utf8_info structure. - */ - public StringMemberValue(int index, ConstPool cp) { - super('s', cp); - this.valueIndex = index; - } - - /** - * Constructs a string constant value. - * - * @param str the initial value. - */ - public StringMemberValue(String str, ConstPool cp) { - super('s', cp); - setValue(str); - } - - /** - * Constructs a string constant value. The initial value is "". - */ - public StringMemberValue(ConstPool cp) { - super('s', cp); - setValue(""); - } - - Object getValue(ClassLoader cl, ClassPool cp, Method m) { - return getValue(); - } - - Class getType(ClassLoader cl) { - return String.class; - } - - /** - * Obtains the value of the member. - */ - public String getValue() { - return cp.getUtf8Info(valueIndex); - } - - /** - * Sets the value of the member. - */ - public void setValue(String newValue) { - valueIndex = cp.addUtf8Info(newValue); - } - - /** - * Obtains the string representation of this object. - */ - public String toString() { - return "\"" + getValue() + "\""; - } - - /** - * Writes the value. - */ - public void write(AnnotationsWriter writer) throws IOException { - writer.constValueIndex(getValue()); - } - - /** - * Accepts a visitor. - */ - public void accept(MemberValueVisitor visitor) { - visitor.visitStringMemberValue(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java b/src/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java deleted file mode 100644 index c35185e..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java +++ /dev/null @@ -1,174 +0,0 @@ -package com.wenshuo.agent.javassist.bytecode.annotation; - -import java.io.IOException; -import java.io.OutputStream; - -import com.wenshuo.agent.javassist.bytecode.ConstPool; - -/** - * A convenience class for constructing a - * {@code ..TypeAnnotations_attribute}. - * See the source code of the {@link javassist.bytecode.TypeAnnotationsAttribute} class. - * - * @since 3.19 - */ -public class TypeAnnotationsWriter extends AnnotationsWriter { - /** - * Constructs with the given output stream. - * - * @param os the output stream. - * @param cp the constant pool. - */ - public TypeAnnotationsWriter(OutputStream os, ConstPool cp) { - super(os, cp); - } - - /** - * Writes {@code num_annotations} in - * {@code Runtime(In)VisibleTypeAnnotations_attribute}. - * It must be followed by {@code num} instances of {@code type_annotation}. - */ - public void numAnnotations(int num) throws IOException { - super.numAnnotations(num); - } - - /** - * Writes {@code target_type} and {@code type_parameter_target} - * of {@code target_info} union. - */ - public void typeParameterTarget(int targetType, int typeParameterIndex) - throws IOException - { - output.write(targetType); - output.write(typeParameterIndex); - } - - /** - * Writes {@code target_type} and {@code supertype_target} - * of {@code target_info} union. - */ - public void supertypeTarget(int supertypeIndex) - throws IOException - { - output.write(0x10); - write16bit(supertypeIndex); - } - - /** - * Writes {@code target_type} and {@code type_parameter_bound_target} - * of {@code target_info} union. - */ - public void typeParameterBoundTarget(int targetType, int typeParameterIndex, int boundIndex) - throws IOException - { - output.write(targetType); - output.write(typeParameterIndex); - output.write(boundIndex); - } - - /** - * Writes {@code target_type} and {@code empty_target} - * of {@code target_info} union. - */ - public void emptyTarget(int targetType) throws IOException { - output.write(targetType); - } - - /** - * Writes {@code target_type} and {@code type_parameter_target} - * of {@code target_info} union. - */ - public void formalParameterTarget(int formalParameterIndex) - throws IOException - { - output.write(0x16); - output.write(formalParameterIndex); - } - - /** - * Writes {@code target_type} and {@code throws_target} - * of {@code target_info} union. - */ - public void throwsTarget(int throwsTypeIndex) - throws IOException - { - output.write(0x17); - write16bit(throwsTypeIndex); - } - - /** - * Writes {@code target_type} and {@code localvar_target} - * of {@code target_info} union. - * It must be followed by {@code tableLength} calls - * to {@code localVarTargetTable}. - */ - public void localVarTarget(int targetType, int tableLength) - throws IOException - { - output.write(targetType); - write16bit(tableLength); - } - - /** - * Writes an element of {@code table[]} of {@code localvar_target} - * of {@code target_info} union. - */ - public void localVarTargetTable(int startPc, int length, int index) - throws IOException - { - write16bit(startPc); - write16bit(length); - write16bit(index); - } - - /** - * Writes {@code target_type} and {@code catch_target} - * of {@code target_info} union. - */ - public void catchTarget(int exceptionTableIndex) - throws IOException - { - output.write(0x42); - write16bit(exceptionTableIndex); - } - - /** - * Writes {@code target_type} and {@code offset_target} - * of {@code target_info} union. - */ - public void offsetTarget(int targetType, int offset) - throws IOException - { - output.write(targetType); - write16bit(offset); - } - - /** - * Writes {@code target_type} and {@code type_argument_target} - * of {@code target_info} union. - */ - public void typeArgumentTarget(int targetType, int offset, int type_argument_index) - throws IOException - { - output.write(targetType); - write16bit(offset); - output.write(type_argument_index); - } - - /** - * Writes {@code path_length} of {@code type_path}. - */ - public void typePath(int pathLength) throws IOException { - output.write(pathLength); - } - - /** - * Writes an element of {@code path[]} of {@code type_path}. - */ - public void typePathPath(int typePathKind, int typeArgumentIndex) - throws IOException - { - output.write(typePathKind); - output.write(typeArgumentIndex); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/annotation/package.html b/src/com/wenshuo/agent/javassist/bytecode/annotation/package.html deleted file mode 100644 index d0656db..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/annotation/package.html +++ /dev/null @@ -1,8 +0,0 @@ - - -Bytecode-level Annotations API. - -

This package provides low-level API for editing annotations attributes. - - - diff --git a/src/com/wenshuo/agent/javassist/bytecode/package.html b/src/com/wenshuo/agent/javassist/bytecode/package.html deleted file mode 100644 index 9da3888..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/package.html +++ /dev/null @@ -1,18 +0,0 @@ - - -Bytecode-level API. - -

This package provides low-level API for editing a raw class file. -It allows the users to read and modify a constant pool entry, a single -bytecode instruction, and so on. - -

The users of this package must know the specifications of -class file and Java bytecode. For more details, read this book: - -

    Tim Lindholm and Frank Yellin, -"The Java Virtual Machine Specification 2nd Ed.", -Addison-Wesley, 1999. -
- - - diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java deleted file mode 100644 index f85821b..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java +++ /dev/null @@ -1,411 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import com.wenshuo.agent.javassist.bytecode.*; -import java.util.HashMap; -import java.util.ArrayList; - -/** - * A basic block is a sequence of bytecode that does not contain jump/branch - * instructions except at the last bytecode. - * Since Java7 or later does not allow JSR, this class throws an exception when - * it finds JSR. - */ -public class BasicBlock { - static class JsrBytecode extends BadBytecode { - JsrBytecode() { super("JSR"); } - } - - protected int position, length; - protected int incoming; // the number of incoming branches. - protected BasicBlock[] exit; // null if the block is a leaf. - protected boolean stop; // true if the block ends with an unconditional jump. - protected Catch toCatch; - - protected BasicBlock(int pos) { - position = pos; - length = 0; - incoming = 0; - } - - public static BasicBlock find(BasicBlock[] blocks, int pos) - throws BadBytecode - { - for (int i = 0; i < blocks.length; i++) { - int iPos = blocks[i].position; - if (iPos <= pos && pos < iPos + blocks[i].length) - return blocks[i]; - } - - throw new BadBytecode("no basic block at " + pos); - } - - public static class Catch { - public Catch next; - public BasicBlock body; - public int typeIndex; - Catch(BasicBlock b, int i, Catch c) { - body = b; - typeIndex = i; - next = c; - } - } - - public String toString() { - StringBuffer sbuf = new StringBuffer(); - String cname = this.getClass().getName(); - int i = cname.lastIndexOf('.'); - sbuf.append(i < 0 ? cname : cname.substring(i + 1)); - sbuf.append("["); - toString2(sbuf); - sbuf.append("]"); - return sbuf.toString(); - } - - protected void toString2(StringBuffer sbuf) { - sbuf.append("pos=").append(position).append(", len=") - .append(length).append(", in=").append(incoming) - .append(", exit{"); - if (exit != null) { - for (int i = 0; i < exit.length; i++) - sbuf.append(exit[i].position).append(","); - } - - sbuf.append("}, {"); - Catch th = toCatch; - while (th != null) { - sbuf.append("(").append(th.body.position).append(", ") - .append(th.typeIndex).append("), "); - th = th.next; - } - - sbuf.append("}"); - } - - /** - * A Mark indicates the position of a branch instruction - * or a branch target. - */ - static class Mark implements Comparable { - int position; - BasicBlock block; - BasicBlock[] jump; - boolean alwaysJmp; // true if an unconditional branch. - int size; // 0 unless the mark indicates RETURN etc. - Catch catcher; - - Mark(int p) { - position = p; - block = null; - jump = null; - alwaysJmp = false; - size = 0; - catcher = null; - } - - public int compareTo(Object obj) { - if (obj instanceof Mark) { - int pos = ((Mark)obj).position; - return position - pos; - } - - return -1; - } - - void setJump(BasicBlock[] bb, int s, boolean always) { - jump = bb; - size = s; - alwaysJmp = always; - } - } - - public static class Maker { - /* Override these two methods if a subclass of BasicBlock must be - * instantiated. - */ - protected BasicBlock makeBlock(int pos) { - return new BasicBlock(pos); - } - - protected BasicBlock[] makeArray(int size) { - return new BasicBlock[size]; - } - - private BasicBlock[] makeArray(BasicBlock b) { - BasicBlock[] array = makeArray(1); - array[0] = b; - return array; - } - - private BasicBlock[] makeArray(BasicBlock b1, BasicBlock b2) { - BasicBlock[] array = makeArray(2); - array[0] = b1; - array[1] = b2; - return array; - } - - public BasicBlock[] make(MethodInfo minfo) throws BadBytecode { - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca == null) - return null; - - CodeIterator ci = ca.iterator(); - return make(ci, 0, ci.getCodeLength(), ca.getExceptionTable()); - } - - public BasicBlock[] make(CodeIterator ci, int begin, int end, - ExceptionTable et) - throws BadBytecode - { - HashMap marks = makeMarks(ci, begin, end, et); - BasicBlock[] bb = makeBlocks(marks); - addCatchers(bb, et); - return bb; - } - - /* Branch target - */ - private Mark makeMark(HashMap table, int pos) { - return makeMark0(table, pos, true, true); - } - - /* Branch instruction. - * size > 0 - */ - private Mark makeMark(HashMap table, int pos, BasicBlock[] jump, - int size, boolean always) { - Mark m = makeMark0(table, pos, false, false); - m.setJump(jump, size, always); - return m; - } - - private Mark makeMark0(HashMap table, int pos, - boolean isBlockBegin, boolean isTarget) { - Integer p = new Integer(pos); - Mark m = (Mark)table.get(p); - if (m == null) { - m = new Mark(pos); - table.put(p, m); - } - - if (isBlockBegin) { - if (m.block == null) - m.block = makeBlock(pos); - - if (isTarget) - m.block.incoming++; - } - - return m; - } - - private HashMap makeMarks(CodeIterator ci, int begin, int end, - ExceptionTable et) - throws BadBytecode - { - ci.begin(); - ci.move(begin); - HashMap marks = new HashMap(); - while (ci.hasNext()) { - int index = ci.next(); - if (index >= end) - break; - - int op = ci.byteAt(index); - if ((Opcode.IFEQ <= op && op <= Opcode.IF_ACMPNE) - || op == Opcode.IFNULL || op == Opcode.IFNONNULL) { - Mark to = makeMark(marks, index + ci.s16bitAt(index + 1)); - Mark next = makeMark(marks, index + 3); - makeMark(marks, index, makeArray(to.block, next.block), 3, false); - } - else if (Opcode.GOTO <= op && op <= Opcode.LOOKUPSWITCH) - switch (op) { - case Opcode.GOTO : - makeGoto(marks, index, index + ci.s16bitAt(index + 1), 3); - break; - case Opcode.JSR : - makeJsr(marks, index, index + ci.s16bitAt(index + 1), 3); - break; - case Opcode.RET : - makeMark(marks, index, null, 2, true); - break; - case Opcode.TABLESWITCH : { - int pos = (index & ~3) + 4; - int low = ci.s32bitAt(pos + 4); - int high = ci.s32bitAt(pos + 8); - int ncases = high - low + 1; - BasicBlock[] to = makeArray(ncases + 1); - to[0] = makeMark(marks, index + ci.s32bitAt(pos)).block; // default branch target - int p = pos + 12; - int n = p + ncases * 4; - int k = 1; - while (p < n) { - to[k++] = makeMark(marks, index + ci.s32bitAt(p)).block; - p += 4; - } - makeMark(marks, index, to, n - index, true); - break; } - case Opcode.LOOKUPSWITCH : { - int pos = (index & ~3) + 4; - int ncases = ci.s32bitAt(pos + 4); - BasicBlock[] to = makeArray(ncases + 1); - to[0] = makeMark(marks, index + ci.s32bitAt(pos)).block; // default branch target - int p = pos + 8 + 4; - int n = p + ncases * 8 - 4; - int k = 1; - while (p < n) { - to[k++] = makeMark(marks, index + ci.s32bitAt(p)).block; - p += 8; - } - makeMark(marks, index, to, n - index, true); - break; } - } - else if ((Opcode.IRETURN <= op && op <= Opcode.RETURN) || op == Opcode.ATHROW) - makeMark(marks, index, null, 1, true); - else if (op == Opcode.GOTO_W) - makeGoto(marks, index, index + ci.s32bitAt(index + 1), 5); - else if (op == Opcode.JSR_W) - makeJsr(marks, index, index + ci.s32bitAt(index + 1), 5); - else if (op == Opcode.WIDE && ci.byteAt(index + 1) == Opcode.RET) - makeMark(marks, index, null, 4, true); - } - - if (et != null) { - int i = et.size(); - while (--i >= 0) { - makeMark0(marks, et.startPc(i), true, false); - makeMark(marks, et.handlerPc(i)); - } - } - - return marks; - } - - private void makeGoto(HashMap marks, int pos, int target, int size) { - Mark to = makeMark(marks, target); - BasicBlock[] jumps = makeArray(to.block); - makeMark(marks, pos, jumps, size, true); - } - - /* - * We could ignore JSR since Java 7 or later does not allow it. - * See The JVM Spec. Sec. 4.10.2.5. - */ - protected void makeJsr(HashMap marks, int pos, int target, int size) throws BadBytecode { - /* - Mark to = makeMark(marks, target); - Mark next = makeMark(marks, pos + size); - BasicBlock[] jumps = makeArray(to.block, next.block); - makeMark(marks, pos, jumps, size, false); - */ - throw new JsrBytecode(); - } - - private BasicBlock[] makeBlocks(HashMap markTable) { - Mark[] marks = (Mark[])markTable.values() - .toArray(new Mark[markTable.size()]); - java.util.Arrays.sort(marks); - ArrayList blocks = new ArrayList(); - int i = 0; - BasicBlock prev; - if (marks.length > 0 && marks[0].position == 0 && marks[0].block != null) - prev = getBBlock(marks[i++]); - else - prev = makeBlock(0); - - blocks.add(prev); - while (i < marks.length) { - Mark m = marks[i++]; - BasicBlock bb = getBBlock(m); - if (bb == null) { - // the mark indicates a branch instruction - if (prev.length > 0) { - // the previous mark already has exits. - prev = makeBlock(prev.position + prev.length); - blocks.add(prev); - } - - prev.length = m.position + m.size - prev.position; - prev.exit = m.jump; - prev.stop = m.alwaysJmp; - } - else { - // the mark indicates a branch target - if (prev.length == 0) { - prev.length = m.position - prev.position; - bb.incoming++; - prev.exit = makeArray(bb); - } - else { - // the previous mark already has exits. - if (prev.position + prev.length < m.position) { - // dead code is found. - prev = makeBlock(prev.position + prev.length); - blocks.add(prev); - prev.length = m.position - prev.position; - // the incoming flow from dead code is not counted - // bb.incoming++; - prev.stop = true; // because the incoming flow is not counted. - prev.exit = makeArray(bb); - } - } - - blocks.add(bb); - prev = bb; - } - } - - return (BasicBlock[])blocks.toArray(makeArray(blocks.size())); - } - - private static BasicBlock getBBlock(Mark m) { - BasicBlock b = m.block; - if (b != null && m.size > 0) { - b.exit = m.jump; - b.length = m.size; - b.stop = m.alwaysJmp; - } - - return b; - } - - private void addCatchers(BasicBlock[] blocks, ExceptionTable et) - throws BadBytecode - { - if (et == null) - return; - - int i = et.size(); - while (--i >= 0) { - BasicBlock handler = find(blocks, et.handlerPc(i)); - int start = et.startPc(i); - int end = et.endPc(i); - int type = et.catchType(i); - handler.incoming--; - for (int k = 0; k < blocks.length; k++) { - BasicBlock bb = blocks[k]; - int iPos = bb.position; - if (start <= iPos && iPos < end) { - bb.toCatch = new Catch(handler, type, bb.toCatch); - handler.incoming++; - } - } - } - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java deleted file mode 100644 index 19f64d5..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java +++ /dev/null @@ -1,606 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import java.util.ArrayList; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.*; - -/** - * Stack map maker. - */ -public class MapMaker extends Tracer { - /* - public static void main(String[] args) throws Exception { - boolean useMain2 = args[0].equals("0"); - if (useMain2 && args.length > 1) { - main2(args); - return; - } - - for (int i = 0; i < args.length; i++) - main1(args[i]); - } - - public static void main1(String className) throws Exception { - ClassPool cp = ClassPool.getDefault(); - //javassist.CtClass cc = cp.get(className); - javassist.CtClass cc = cp.makeClass(new java.io.FileInputStream(className)); - System.out.println(className); - ClassFile cf = cc.getClassFile(); - java.util.List minfos = cf.getMethods(); - for (int i = 0; i < minfos.size(); i++) { - MethodInfo minfo = (MethodInfo)minfos.get(i); - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca != null) - ca.setAttribute(make(cp, minfo)); - } - - cc.writeFile("tmp"); - } - - public static void main2(String[] args) throws Exception { - ClassPool cp = ClassPool.getDefault(); - //javassist.CtClass cc = cp.get(args[1]); - javassist.CtClass cc = cp.makeClass(new java.io.FileInputStream(args[1])); - MethodInfo minfo; - if (args[2].equals("_init_")) - minfo = cc.getDeclaredConstructors()[0].getMethodInfo(); - // minfo = cc.getClassInitializer().getMethodInfo(); - else - minfo = cc.getDeclaredMethod(args[2]).getMethodInfo(); - - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca == null) { - System.out.println("abstarct method"); - return; - } - - TypedBlock[] blocks = TypedBlock.makeBlocks(minfo, ca, false); - MapMaker mm = new MapMaker(cp, minfo, ca); - mm.make(blocks, ca.getCode()); - for (int i = 0; i < blocks.length; i++) - System.out.println(blocks[i]); - } - */ - - /** - * Computes the stack map table of the given method and returns it. - * It returns null if the given method does not have to have a - * stack map table or it includes JSR. - */ - public static StackMapTable make(ClassPool classes, MethodInfo minfo) - throws BadBytecode - { - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca == null) - return null; - - TypedBlock[] blocks; - try { - blocks = TypedBlock.makeBlocks(minfo, ca, true); - } - catch (BasicBlock.JsrBytecode e) { - return null; - } - - if (blocks == null) - return null; - - MapMaker mm = new MapMaker(classes, minfo, ca); - try { - mm.make(blocks, ca.getCode()); - } - catch (BadBytecode bb) { - throw new BadBytecode(minfo, bb); - } - - return mm.toStackMap(blocks); - } - - /** - * Computes the stack map table for J2ME. - * It returns null if the given method does not have to have a - * stack map table or it includes JSR. - */ - public static StackMap make2(ClassPool classes, MethodInfo minfo) - throws BadBytecode - { - CodeAttribute ca = minfo.getCodeAttribute(); - if (ca == null) - return null; - - TypedBlock[] blocks; - try { - blocks = TypedBlock.makeBlocks(minfo, ca, true); - } - catch (BasicBlock.JsrBytecode e) { - return null; - } - - if (blocks == null) - return null; - - MapMaker mm = new MapMaker(classes, minfo, ca); - try { - mm.make(blocks, ca.getCode()); - } - catch (BadBytecode bb) { - throw new BadBytecode(minfo, bb); - } - return mm.toStackMap2(minfo.getConstPool(), blocks); - } - - public MapMaker(ClassPool classes, MethodInfo minfo, CodeAttribute ca) { - super(classes, minfo.getConstPool(), - ca.getMaxStack(), ca.getMaxLocals(), - TypedBlock.getRetType(minfo.getDescriptor())); - } - - protected MapMaker(MapMaker old) { super(old); } - - /** - * Runs an analyzer (Phase 1 and 2). - */ - void make(TypedBlock[] blocks, byte[] code) - throws BadBytecode - { - make(code, blocks[0]); - findDeadCatchers(code, blocks); - try { - fixTypes(code, blocks); - } catch (NotFoundException e) { - throw new BadBytecode("failed to resolve types", e); - } - } - - // Phase 1 - - private void make(byte[] code, TypedBlock tb) - throws BadBytecode - { - copyTypeData(tb.stackTop, tb.stackTypes, stackTypes); - stackTop = tb.stackTop; - copyTypeData(tb.localsTypes.length, tb.localsTypes, localsTypes); - - traceException(code, tb.toCatch); - - int pos = tb.position; - int end = pos + tb.length; - while (pos < end) { - pos += doOpcode(pos, code); - traceException(code, tb.toCatch); - } - - if (tb.exit != null) { - for (int i = 0; i < tb.exit.length; i++) { - TypedBlock e = (TypedBlock)tb.exit[i]; - if (e.alreadySet()) - mergeMap(e, true); - else { - recordStackMap(e); - MapMaker maker = new MapMaker(this); - maker.make(code, e); - } - } - } - } - - private void traceException(byte[] code, TypedBlock.Catch handler) - throws BadBytecode - { - while (handler != null) { - TypedBlock tb = (TypedBlock)handler.body; - if (tb.alreadySet()) { - mergeMap(tb, false); - if (tb.stackTop < 1) - throw new BadBytecode("bad catch clause: " + handler.typeIndex); - - tb.stackTypes[0] = merge(toExceptionType(handler.typeIndex), - tb.stackTypes[0]); - } - else { - recordStackMap(tb, handler.typeIndex); - MapMaker maker = new MapMaker(this); - maker.make(code, tb); - } - - handler = handler.next; - } - } - - private void mergeMap(TypedBlock dest, boolean mergeStack) throws BadBytecode { - int n = localsTypes.length; - for (int i = 0; i < n; i++) - dest.localsTypes[i] = merge(validateTypeData(localsTypes, n, i), - dest.localsTypes[i]); - - if (mergeStack) { - n = stackTop; - for (int i = 0; i < n; i++) - dest.stackTypes[i] = merge(stackTypes[i], dest.stackTypes[i]); - } - } - - private TypeData merge(TypeData src, TypeData target) throws BadBytecode { - if (src == target) - return target; - else if (target instanceof TypeData.ClassName - || target instanceof TypeData.BasicType) // a parameter - return target; - else if (target instanceof TypeData.AbsTypeVar) { - ((TypeData.AbsTypeVar)target).merge(src); - return target; - } - else - throw new RuntimeException("fatal: this should never happen"); - } - - private void recordStackMap(TypedBlock target) - throws BadBytecode - { - TypeData[] tStackTypes = TypeData.make(stackTypes.length); - int st = stackTop; - recordTypeData(st, stackTypes, tStackTypes); - recordStackMap0(target, st, tStackTypes); - } - - private void recordStackMap(TypedBlock target, int exceptionType) - throws BadBytecode - { - TypeData[] tStackTypes = TypeData.make(stackTypes.length); - tStackTypes[0] = toExceptionType(exceptionType).join(); - recordStackMap0(target, 1, tStackTypes); - } - - private TypeData.ClassName toExceptionType(int exceptionType) { - String type; - if (exceptionType == 0) // for finally clauses - type= "java.lang.Throwable"; - else - type = cpool.getClassInfo(exceptionType); - - return new TypeData.ClassName(type); - } - - private void recordStackMap0(TypedBlock target, int st, TypeData[] tStackTypes) - throws BadBytecode - { - int n = localsTypes.length; - TypeData[] tLocalsTypes = TypeData.make(n); - int k = recordTypeData(n, localsTypes, tLocalsTypes); - target.setStackMap(st, tStackTypes, k, tLocalsTypes); - } - - protected static int recordTypeData(int n, TypeData[] srcTypes, TypeData[] destTypes) { - int k = -1; - for (int i = 0; i < n; i++) { - TypeData t = validateTypeData(srcTypes, n, i); - destTypes[i] = t.join(); - if (t != TOP) - k = i + 1; // t might be long or double. - } - - return k + 1; - } - - protected static void copyTypeData(int n, TypeData[] srcTypes, TypeData[] destTypes) { - for (int i = 0; i < n; i++) - destTypes[i] = srcTypes[i]; - } - - private static TypeData validateTypeData(TypeData[] data, int length, int index) { - TypeData td = data[index]; - if (td.is2WordType() && index + 1 < length) - if (data[index + 1] != TOP) - return TOP; - - return td; - } - - // Phase 1.5 - - /* - * Javac may generate an exception handler that catches only the exception - * thrown within the handler itself. It is dead code. - * See javassist.JvstTest4.testJIRA195(). - */ - - private void findDeadCatchers(byte[] code, TypedBlock[] blocks) throws BadBytecode { - int len = blocks.length; - for (int i = 0; i < len; i++) { - TypedBlock block = blocks[i]; - if (!block.alreadySet()) { - fixDeadcode(code, block); - BasicBlock.Catch handler = block.toCatch; - if (handler != null) { - TypedBlock tb = (TypedBlock)handler.body; - if (!tb.alreadySet()) { - // tb is a handler that catches only the exceptions - // thrown from dead code. - recordStackMap(tb, handler.typeIndex); - fixDeadcode(code, tb); - tb.incoming = 1; - } - } - - } - } - } - - private void fixDeadcode(byte[] code, TypedBlock block) throws BadBytecode { - int pos = block.position; - int len = block.length - 3; - if (len < 0) { - // if the dead-code length is shorter than 3 bytes. - if (len == -1) - code[pos] = Bytecode.NOP; - - code[pos + block.length - 1] = (byte)Bytecode.ATHROW; - block.incoming = 1; - recordStackMap(block, 0); - return; - } - - // if block.incomping > 0, all the incoming edges are from - // other dead code blocks. So set block.incoming to 0. - block.incoming = 0; - - for (int k = 0; k < len; k++) - code[pos + k] = Bytecode.NOP; - - code[pos + len] = (byte)Bytecode.GOTO; - ByteArray.write16bit(-len, code, pos + len + 1); - } - - // Phase 2 - - /* - * This method first finds strongly connected components (SCCs) - * in a TypeData graph by Tarjan's algorithm. - * SCCs are TypeData nodes sharing the same type. - * Since SCCs are found in the topologically sorted order, - * their types are also fixed when they are found. - */ - private void fixTypes(byte[] code, TypedBlock[] blocks) throws NotFoundException, BadBytecode { - ArrayList preOrder = new ArrayList(); - int len = blocks.length; - int index = 0; - for (int i = 0; i < len; i++) { - TypedBlock block = blocks[i]; - if (block.alreadySet()) { // if block is not dead code - int n = block.localsTypes.length; - for (int j = 0; j < n; j++) - index = block.localsTypes[j].dfs(preOrder, index, classPool); - - n = block.stackTop; - for (int j = 0; j < n; j++) - index = block.stackTypes[j].dfs(preOrder, index, classPool); - } - } - } - - // Phase 3 - - public StackMapTable toStackMap(TypedBlock[] blocks) { - StackMapTable.Writer writer = new StackMapTable.Writer(32); - int n = blocks.length; - TypedBlock prev = blocks[0]; - int offsetDelta = prev.length; - if (prev.incoming > 0) { // the first instruction is a branch target. - writer.sameFrame(0); - offsetDelta--; - } - - for (int i = 1; i < n; i++) { - TypedBlock bb = blocks[i]; - if (isTarget(bb, blocks[i - 1])) { - bb.resetNumLocals(); - int diffL = stackMapDiff(prev.numLocals, prev.localsTypes, - bb.numLocals, bb.localsTypes); - toStackMapBody(writer, bb, diffL, offsetDelta, prev); - offsetDelta = bb.length - 1; - prev = bb; - } - else if (bb.incoming == 0) { - // dead code. - writer.sameFrame(offsetDelta); - offsetDelta = bb.length - 1; - prev = bb; - } - else - offsetDelta += bb.length; - } - - return writer.toStackMapTable(cpool); - } - - /** - * Returns true if cur is a branch target. - */ - private boolean isTarget(TypedBlock cur, TypedBlock prev) { - int in = cur.incoming; - if (in > 1) - return true; - else if (in < 1) - return false; - - return prev.stop; - } - - private void toStackMapBody(StackMapTable.Writer writer, TypedBlock bb, - int diffL, int offsetDelta, TypedBlock prev) { - // if diffL is -100, two TypeData arrays do not share - // any elements. - - int stackTop = bb.stackTop; - if (stackTop == 0) { - if (diffL == 0) { - writer.sameFrame(offsetDelta); - return; - } - else if (0 > diffL && diffL >= -3) { - writer.chopFrame(offsetDelta, -diffL); - return; - } - else if (0 < diffL && diffL <= 3) { - int[] data = new int[diffL]; - int[] tags = fillStackMap(bb.numLocals - prev.numLocals, - prev.numLocals, data, - bb.localsTypes); - writer.appendFrame(offsetDelta, tags, data); - return; - } - } - else if (stackTop == 1 && diffL == 0) { - TypeData td = bb.stackTypes[0]; - writer.sameLocals(offsetDelta, td.getTypeTag(), td.getTypeData(cpool)); - return; - } - else if (stackTop == 2 && diffL == 0) { - TypeData td = bb.stackTypes[0]; - if (td.is2WordType()) { - // bb.stackTypes[1] must be TOP. - writer.sameLocals(offsetDelta, td.getTypeTag(), td.getTypeData(cpool)); - return; - } - } - - int[] sdata = new int[stackTop]; - int[] stags = fillStackMap(stackTop, 0, sdata, bb.stackTypes); - int[] ldata = new int[bb.numLocals]; - int[] ltags = fillStackMap(bb.numLocals, 0, ldata, bb.localsTypes); - writer.fullFrame(offsetDelta, ltags, ldata, stags, sdata); - } - - private int[] fillStackMap(int num, int offset, int[] data, TypeData[] types) { - int realNum = diffSize(types, offset, offset + num); - ConstPool cp = cpool; - int[] tags = new int[realNum]; - int j = 0; - for (int i = 0; i < num; i++) { - TypeData td = types[offset + i]; - tags[j] = td.getTypeTag(); - data[j] = td.getTypeData(cp); - if (td.is2WordType()) - i++; - - j++; - } - - return tags; - } - - private static int stackMapDiff(int oldTdLen, TypeData[] oldTd, - int newTdLen, TypeData[] newTd) - { - int diff = newTdLen - oldTdLen; - int len; - if (diff > 0) - len = oldTdLen; - else - len = newTdLen; - - if (stackMapEq(oldTd, newTd, len)) - if (diff > 0) - return diffSize(newTd, len, newTdLen); - else - return -diffSize(oldTd, len, oldTdLen); - else - return -100; - } - - private static boolean stackMapEq(TypeData[] oldTd, TypeData[] newTd, int len) { - for (int i = 0; i < len; i++) { - if (!oldTd[i].eq(newTd[i])) - return false; - } - - return true; - } - - private static int diffSize(TypeData[] types, int offset, int len) { - int num = 0; - while (offset < len) { - TypeData td = types[offset++]; - num++; - if (td.is2WordType()) - offset++; - } - - return num; - } - - // Phase 3 for J2ME - - public StackMap toStackMap2(ConstPool cp, TypedBlock[] blocks) { - StackMap.Writer writer = new StackMap.Writer(); - int n = blocks.length; // should be > 0 - boolean[] effective = new boolean[n]; - TypedBlock prev = blocks[0]; - - // Is the first instruction a branch target? - effective[0] = prev.incoming > 0; - - int num = effective[0] ? 1 : 0; - for (int i = 1; i < n; i++) { - TypedBlock bb = blocks[i]; - if (effective[i] = isTarget(bb, blocks[i - 1])) { - bb.resetNumLocals(); - prev = bb; - num++; - } - } - - if (num == 0) - return null; - - writer.write16bit(num); - for (int i = 0; i < n; i++) - if (effective[i]) - writeStackFrame(writer, cp, blocks[i].position, blocks[i]); - - return writer.toStackMap(cp); - } - - private void writeStackFrame(StackMap.Writer writer, ConstPool cp, int offset, TypedBlock tb) { - writer.write16bit(offset); - writeVerifyTypeInfo(writer, cp, tb.localsTypes, tb.numLocals); - writeVerifyTypeInfo(writer, cp, tb.stackTypes, tb.stackTop); - } - - private void writeVerifyTypeInfo(StackMap.Writer writer, ConstPool cp, TypeData[] types, int num) { - int numDWord = 0; - for (int i = 0; i < num; i++) { - TypeData td = types[i]; - if (td != null && td.is2WordType()) { - numDWord++; - i++; - } - } - - writer.write16bit(num - numDWord); - for (int i = 0; i < num; i++) { - TypeData td = types[i]; - writer.writeVerifyTypeInfo(td.getTypeTag(), td.getTypeData(cp)); - if (td.is2WordType()) - i++; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java deleted file mode 100644 index caef5c9..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java +++ /dev/null @@ -1,933 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import com.wenshuo.agent.javassist.bytecode.ByteArray; -import com.wenshuo.agent.javassist.bytecode.Opcode; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.ClassPool; - -/* - * A class for performing abstract interpretation. - * See also MapMaker class. - */ - -public abstract class Tracer implements TypeTag { - protected ClassPool classPool; - protected ConstPool cpool; - protected String returnType; // used as the type of ARETURN - - protected int stackTop; - protected TypeData[] stackTypes; - protected TypeData[] localsTypes; - - public Tracer(ClassPool classes, ConstPool cp, int maxStack, int maxLocals, - String retType) { - classPool = classes; - cpool = cp; - returnType = retType; - stackTop = 0; - stackTypes = TypeData.make(maxStack); - localsTypes = TypeData.make(maxLocals); - } - - public Tracer(Tracer t) { - classPool = t.classPool; - cpool = t.cpool; - returnType = t.returnType; - stackTop = t.stackTop; - stackTypes = TypeData.make(t.stackTypes.length); - localsTypes = TypeData.make(t.localsTypes.length); - } - - /** - * Does abstract interpretation on the given bytecode instruction. - * It records whether or not a local variable (i.e. register) is accessed. - * If the instruction requires that a local variable or - * a stack element has a more specific type, this method updates the - * type of it. - * - * @param pos the position of the instruction. - * @return the size of the instruction at POS. - */ - protected int doOpcode(int pos, byte[] code) throws BadBytecode { - try { - int op = code[pos] & 0xff; - if (op < 96) - if (op < 54) - return doOpcode0_53(pos, code, op); - else - return doOpcode54_95(pos, code, op); - else - if (op < 148) - return doOpcode96_147(pos, code, op); - else - return doOpcode148_201(pos, code, op); - } - catch (ArrayIndexOutOfBoundsException e) { - throw new BadBytecode("inconsistent stack height " + e.getMessage(), e); - } - } - - protected void visitBranch(int pos, byte[] code, int offset) throws BadBytecode {} - protected void visitGoto(int pos, byte[] code, int offset) throws BadBytecode {} - protected void visitReturn(int pos, byte[] code) throws BadBytecode {} - protected void visitThrow(int pos, byte[] code) throws BadBytecode {} - - /** - * @param pos the position of TABLESWITCH - * @param code bytecode - * @param n the number of case labels - * @param offsetPos the position of the branch-target table. - * @param defaultOffset the offset to the default branch target. - */ - protected void visitTableSwitch(int pos, byte[] code, int n, - int offsetPos, int defaultOffset) throws BadBytecode {} - - /** - * @param pos the position of LOOKUPSWITCH - * @param code bytecode - * @param n the number of case labels - * @param pairsPos the position of the table of pairs of a value and a branch target. - * @param defaultOffset the offset to the default branch target. - */ - protected void visitLookupSwitch(int pos, byte[] code, int n, - int pairsPos, int defaultOffset) throws BadBytecode {} - - /** - * Invoked when the visited instruction is jsr. - * Java6 or later does not allow using RET. - */ - protected void visitJSR(int pos, byte[] code) throws BadBytecode { - /* Since JSR pushes a return address onto the operand stack, - * the stack map at the entry point of a subroutine is - * stackTypes resulting after executing the following code: - * - * stackTypes[stackTop++] = TOP; - */ - } - - /** - * Invoked when the visited instruction is ret or wide ret. - * Java6 or later does not allow using RET. - */ - protected void visitRET(int pos, byte[] code) throws BadBytecode {} - - private int doOpcode0_53(int pos, byte[] code, int op) throws BadBytecode { - int reg; - TypeData[] stackTypes = this.stackTypes; - switch (op) { - case Opcode.NOP : - break; - case Opcode.ACONST_NULL : - stackTypes[stackTop++] = new TypeData.NullType(); - break; - case Opcode.ICONST_M1 : - case Opcode.ICONST_0 : - case Opcode.ICONST_1 : - case Opcode.ICONST_2 : - case Opcode.ICONST_3 : - case Opcode.ICONST_4 : - case Opcode.ICONST_5 : - stackTypes[stackTop++] = INTEGER; - break; - case Opcode.LCONST_0 : - case Opcode.LCONST_1 : - stackTypes[stackTop++] = LONG; - stackTypes[stackTop++] = TOP; - break; - case Opcode.FCONST_0 : - case Opcode.FCONST_1 : - case Opcode.FCONST_2 : - stackTypes[stackTop++] = FLOAT; - break; - case Opcode.DCONST_0 : - case Opcode.DCONST_1 : - stackTypes[stackTop++] = DOUBLE; - stackTypes[stackTop++] = TOP; - break; - case Opcode.BIPUSH : - case Opcode.SIPUSH : - stackTypes[stackTop++] = INTEGER; - return op == Opcode.SIPUSH ? 3 : 2; - case Opcode.LDC : - doLDC(code[pos + 1] & 0xff); - return 2; - case Opcode.LDC_W : - case Opcode.LDC2_W : - doLDC(ByteArray.readU16bit(code, pos + 1)); - return 3; - case Opcode.ILOAD : - return doXLOAD(INTEGER, code, pos); - case Opcode.LLOAD : - return doXLOAD(LONG, code, pos); - case Opcode.FLOAD : - return doXLOAD(FLOAT, code, pos); - case Opcode.DLOAD : - return doXLOAD(DOUBLE, code, pos); - case Opcode.ALOAD : - return doALOAD(code[pos + 1] & 0xff); - case Opcode.ILOAD_0 : - case Opcode.ILOAD_1 : - case Opcode.ILOAD_2 : - case Opcode.ILOAD_3 : - stackTypes[stackTop++] = INTEGER; - break; - case Opcode.LLOAD_0 : - case Opcode.LLOAD_1 : - case Opcode.LLOAD_2 : - case Opcode.LLOAD_3 : - stackTypes[stackTop++] = LONG; - stackTypes[stackTop++] = TOP; - break; - case Opcode.FLOAD_0 : - case Opcode.FLOAD_1 : - case Opcode.FLOAD_2 : - case Opcode.FLOAD_3 : - stackTypes[stackTop++] = FLOAT; - break; - case Opcode.DLOAD_0 : - case Opcode.DLOAD_1 : - case Opcode.DLOAD_2 : - case Opcode.DLOAD_3 : - stackTypes[stackTop++] = DOUBLE; - stackTypes[stackTop++] = TOP; - break; - case Opcode.ALOAD_0 : - case Opcode.ALOAD_1 : - case Opcode.ALOAD_2 : - case Opcode.ALOAD_3 : - reg = op - Opcode.ALOAD_0; - stackTypes[stackTop++] = localsTypes[reg]; - break; - case Opcode.IALOAD : - stackTypes[--stackTop - 1] = INTEGER; - break; - case Opcode.LALOAD : - stackTypes[stackTop - 2] = LONG; - stackTypes[stackTop - 1] = TOP; - break; - case Opcode.FALOAD : - stackTypes[--stackTop - 1] = FLOAT; - break; - case Opcode.DALOAD : - stackTypes[stackTop - 2] = DOUBLE; - stackTypes[stackTop - 1] = TOP; - break; - case Opcode.AALOAD : { - int s = --stackTop - 1; - TypeData data = stackTypes[s]; - stackTypes[s] = TypeData.ArrayElement.make(data); - break; } - case Opcode.BALOAD : - case Opcode.CALOAD : - case Opcode.SALOAD : - stackTypes[--stackTop - 1] = INTEGER; - break; - default : - throw new RuntimeException("fatal"); - } - - return 1; - } - - private void doLDC(int index) { - TypeData[] stackTypes = this.stackTypes; - int tag = cpool.getTag(index); - if (tag == ConstPool.CONST_String) - stackTypes[stackTop++] = new TypeData.ClassName("java.lang.String"); - else if (tag == ConstPool.CONST_Integer) - stackTypes[stackTop++] = INTEGER; - else if (tag == ConstPool.CONST_Float) - stackTypes[stackTop++] = FLOAT; - else if (tag == ConstPool.CONST_Long) { - stackTypes[stackTop++] = LONG; - stackTypes[stackTop++] = TOP; - } - else if (tag == ConstPool.CONST_Double) { - stackTypes[stackTop++] = DOUBLE; - stackTypes[stackTop++] = TOP; - } - else if (tag == ConstPool.CONST_Class) - stackTypes[stackTop++] = new TypeData.ClassName("java.lang.Class"); - else - throw new RuntimeException("bad LDC: " + tag); - } - - private int doXLOAD(TypeData type, byte[] code, int pos) { - int localVar = code[pos + 1] & 0xff; - return doXLOAD(localVar, type); - } - - private int doXLOAD(int localVar, TypeData type) { - stackTypes[stackTop++] = type; - if (type.is2WordType()) - stackTypes[stackTop++] = TOP; - - return 2; - } - - private int doALOAD(int localVar) { - stackTypes[stackTop++] = localsTypes[localVar]; - return 2; - } - - private int doOpcode54_95(int pos, byte[] code, int op) throws BadBytecode { - switch (op) { - case Opcode.ISTORE : - return doXSTORE(pos, code, INTEGER); - case Opcode.LSTORE : - return doXSTORE(pos, code, LONG); - case Opcode.FSTORE : - return doXSTORE(pos, code, FLOAT); - case Opcode.DSTORE : - return doXSTORE(pos, code, DOUBLE); - case Opcode.ASTORE : - return doASTORE(code[pos + 1] & 0xff); - case Opcode.ISTORE_0 : - case Opcode.ISTORE_1 : - case Opcode.ISTORE_2 : - case Opcode.ISTORE_3 : - { int var = op - Opcode.ISTORE_0; - localsTypes[var] = INTEGER; - stackTop--; } - break; - case Opcode.LSTORE_0 : - case Opcode.LSTORE_1 : - case Opcode.LSTORE_2 : - case Opcode.LSTORE_3 : - { int var = op - Opcode.LSTORE_0; - localsTypes[var] = LONG; - localsTypes[var + 1] = TOP; - stackTop -= 2; } - break; - case Opcode.FSTORE_0 : - case Opcode.FSTORE_1 : - case Opcode.FSTORE_2 : - case Opcode.FSTORE_3 : - { int var = op - Opcode.FSTORE_0; - localsTypes[var] = FLOAT; - stackTop--; } - break; - case Opcode.DSTORE_0 : - case Opcode.DSTORE_1 : - case Opcode.DSTORE_2 : - case Opcode.DSTORE_3 : - { int var = op - Opcode.DSTORE_0; - localsTypes[var] = DOUBLE; - localsTypes[var + 1] = TOP; - stackTop -= 2; } - break; - case Opcode.ASTORE_0 : - case Opcode.ASTORE_1 : - case Opcode.ASTORE_2 : - case Opcode.ASTORE_3 : - { int var = op - Opcode.ASTORE_0; - doASTORE(var); - break; } - case Opcode.IASTORE : - case Opcode.LASTORE : - case Opcode.FASTORE : - case Opcode.DASTORE : - stackTop -= (op == Opcode.LASTORE || op == Opcode.DASTORE) ? 4 : 3; - break; - case Opcode.AASTORE : - TypeData.ArrayElement.aastore(stackTypes[stackTop - 3], - stackTypes[stackTop - 1], - classPool); - stackTop -= 3; - break; - case Opcode.BASTORE : - case Opcode.CASTORE : - case Opcode.SASTORE : - stackTop -= 3; - break; - case Opcode.POP : - stackTop--; - break; - case Opcode.POP2 : - stackTop -= 2; - break; - case Opcode.DUP : { - int sp = stackTop; - stackTypes[sp] = stackTypes[sp - 1]; - stackTop = sp + 1; - break; } - case Opcode.DUP_X1 : - case Opcode.DUP_X2 : { - int len = op - Opcode.DUP_X1 + 2; - doDUP_XX(1, len); - int sp = stackTop; - stackTypes[sp - len] = stackTypes[sp]; - stackTop = sp + 1; - break; } - case Opcode.DUP2 : - doDUP_XX(2, 2); - stackTop += 2; - break; - case Opcode.DUP2_X1 : - case Opcode.DUP2_X2 : { - int len = op - Opcode.DUP2_X1 + 3; - doDUP_XX(2, len); - int sp = stackTop; - stackTypes[sp - len] = stackTypes[sp]; - stackTypes[sp - len + 1] = stackTypes[sp + 1]; - stackTop = sp + 2; - break; } - case Opcode.SWAP : { - int sp = stackTop - 1; - TypeData t = stackTypes[sp]; - stackTypes[sp] = stackTypes[sp - 1]; - stackTypes[sp - 1] = t; - break; } - default : - throw new RuntimeException("fatal"); - } - - return 1; - } - - private int doXSTORE(int pos, byte[] code, TypeData type) { - int index = code[pos + 1] & 0xff; - return doXSTORE(index, type); - } - - private int doXSTORE(int index, TypeData type) { - stackTop--; - localsTypes[index] = type; - if (type.is2WordType()) { - stackTop--; - localsTypes[index + 1] = TOP; - } - - return 2; - } - - private int doASTORE(int index) { - stackTop--; - // implicit upcast might be done. - localsTypes[index] = stackTypes[stackTop]; - return 2; - } - - private void doDUP_XX(int delta, int len) { - TypeData types[] = stackTypes; - int sp = stackTop - 1; - int end = sp - len; - while (sp > end) { - types[sp + delta] = types[sp]; - sp--; - } - } - - private int doOpcode96_147(int pos, byte[] code, int op) { - if (op <= Opcode.LXOR) { // IADD...LXOR - stackTop += Opcode.STACK_GROW[op]; - return 1; - } - - switch (op) { - case Opcode.IINC : - // this does not call writeLocal(). - return 3; - case Opcode.I2L : - stackTypes[stackTop - 1] = LONG; - stackTypes[stackTop] = TOP; - stackTop++; - break; - case Opcode.I2F : - stackTypes[stackTop - 1] = FLOAT; - break; - case Opcode.I2D : - stackTypes[stackTop - 1] = DOUBLE; - stackTypes[stackTop] = TOP; - stackTop++; - break; - case Opcode.L2I : - stackTypes[--stackTop - 1] = INTEGER; - break; - case Opcode.L2F : - stackTypes[--stackTop - 1] = FLOAT; - break; - case Opcode.L2D : - stackTypes[stackTop - 2] = DOUBLE; - break; - case Opcode.F2I : - stackTypes[stackTop - 1] = INTEGER; - break; - case Opcode.F2L : - stackTypes[stackTop - 1] = LONG; - stackTypes[stackTop] = TOP; - stackTop++; - break; - case Opcode.F2D : - stackTypes[stackTop - 1] = DOUBLE; - stackTypes[stackTop] = TOP; - stackTop++; - break; - case Opcode.D2I : - stackTypes[--stackTop - 1] = INTEGER; - break; - case Opcode.D2L : - stackTypes[stackTop - 2] = LONG; - break; - case Opcode.D2F : - stackTypes[--stackTop - 1] = FLOAT; - break; - case Opcode.I2B : - case Opcode.I2C : - case Opcode.I2S : - break; - default : - throw new RuntimeException("fatal"); - } - - return 1; - } - - private int doOpcode148_201(int pos, byte[] code, int op) throws BadBytecode { - switch (op) { - case Opcode.LCMP : - stackTypes[stackTop - 4] = INTEGER; - stackTop -= 3; - break; - case Opcode.FCMPL : - case Opcode.FCMPG : - stackTypes[--stackTop - 1] = INTEGER; - break; - case Opcode.DCMPL : - case Opcode.DCMPG : - stackTypes[stackTop - 4] = INTEGER; - stackTop -= 3; - break; - case Opcode.IFEQ : - case Opcode.IFNE : - case Opcode.IFLT : - case Opcode.IFGE : - case Opcode.IFGT : - case Opcode.IFLE : - stackTop--; // branch - visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); - return 3; - case Opcode.IF_ICMPEQ : - case Opcode.IF_ICMPNE : - case Opcode.IF_ICMPLT : - case Opcode.IF_ICMPGE : - case Opcode.IF_ICMPGT : - case Opcode.IF_ICMPLE : - case Opcode.IF_ACMPEQ : - case Opcode.IF_ACMPNE : - stackTop -= 2; // branch - visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); - return 3; - case Opcode.GOTO : - visitGoto(pos, code, ByteArray.readS16bit(code, pos + 1)); - return 3; // branch - case Opcode.JSR : - visitJSR(pos, code); - return 3; // branch - case Opcode.RET : - visitRET(pos, code); - return 2; - case Opcode.TABLESWITCH : { - stackTop--; // branch - int pos2 = (pos & ~3) + 8; - int low = ByteArray.read32bit(code, pos2); - int high = ByteArray.read32bit(code, pos2 + 4); - int n = high - low + 1; - visitTableSwitch(pos, code, n, pos2 + 8, ByteArray.read32bit(code, pos2 - 4)); - return n * 4 + 16 - (pos & 3); } - case Opcode.LOOKUPSWITCH : { - stackTop--; // branch - int pos2 = (pos & ~3) + 8; - int n = ByteArray.read32bit(code, pos2); - visitLookupSwitch(pos, code, n, pos2 + 4, ByteArray.read32bit(code, pos2 - 4)); - return n * 8 + 12 - (pos & 3); } - case Opcode.IRETURN : - stackTop--; - visitReturn(pos, code); - break; - case Opcode.LRETURN : - stackTop -= 2; - visitReturn(pos, code); - break; - case Opcode.FRETURN : - stackTop--; - visitReturn(pos, code); - break; - case Opcode.DRETURN : - stackTop -= 2; - visitReturn(pos, code); - break; - case Opcode.ARETURN : - stackTypes[--stackTop].setType(returnType, classPool); - visitReturn(pos, code); - break; - case Opcode.RETURN : - visitReturn(pos, code); - break; - case Opcode.GETSTATIC : - return doGetField(pos, code, false); - case Opcode.PUTSTATIC : - return doPutField(pos, code, false); - case Opcode.GETFIELD : - return doGetField(pos, code, true); - case Opcode.PUTFIELD : - return doPutField(pos, code, true); - case Opcode.INVOKEVIRTUAL : - case Opcode.INVOKESPECIAL : - return doInvokeMethod(pos, code, true); - case Opcode.INVOKESTATIC : - return doInvokeMethod(pos, code, false); - case Opcode.INVOKEINTERFACE : - return doInvokeIntfMethod(pos, code); - case Opcode.INVOKEDYNAMIC : - return doInvokeDynamic(pos, code); - case Opcode.NEW : { - int i = ByteArray.readU16bit(code, pos + 1); - stackTypes[stackTop++] - = new TypeData.UninitData(pos, cpool.getClassInfo(i)); - return 3; } - case Opcode.NEWARRAY : - return doNEWARRAY(pos, code); - case Opcode.ANEWARRAY : { - int i = ByteArray.readU16bit(code, pos + 1); - String type = cpool.getClassInfo(i).replace('.', '/'); - if (type.charAt(0) == '[') - type = "[" + type; - else - type = "[L" + type + ";"; - - stackTypes[stackTop - 1] - = new TypeData.ClassName(type); - return 3; } - case Opcode.ARRAYLENGTH : - stackTypes[stackTop - 1].setType("[Ljava.lang.Object;", classPool); - stackTypes[stackTop - 1] = INTEGER; - break; - case Opcode.ATHROW : - stackTypes[--stackTop].setType("java.lang.Throwable", classPool); - visitThrow(pos, code); - break; - case Opcode.CHECKCAST : { - // TypeData.setType(stackTypes[stackTop - 1], "java.lang.Object", classPool); - int i = ByteArray.readU16bit(code, pos + 1); - String type = cpool.getClassInfo(i); - if (type.charAt(0) == '[') - type = type.replace('.', '/'); // getClassInfo() may return "[java.lang.Object;". - - stackTypes[stackTop - 1] = new TypeData.ClassName(type); - return 3; } - case Opcode.INSTANCEOF : - // TypeData.setType(stackTypes[stackTop - 1], "java.lang.Object", classPool); - stackTypes[stackTop - 1] = INTEGER; - return 3; - case Opcode.MONITORENTER : - case Opcode.MONITOREXIT : - stackTop--; - // TypeData.setType(stackTypes[stackTop], "java.lang.Object", classPool); - break; - case Opcode.WIDE : - return doWIDE(pos, code); - case Opcode.MULTIANEWARRAY : - return doMultiANewArray(pos, code); - case Opcode.IFNULL : - case Opcode.IFNONNULL : - stackTop--; // branch - visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); - return 3; - case Opcode.GOTO_W : - visitGoto(pos, code, ByteArray.read32bit(code, pos + 1)); - return 5; // branch - case Opcode.JSR_W : - visitJSR(pos, code); - return 5; - } - return 1; - } - - private int doWIDE(int pos, byte[] code) throws BadBytecode { - int op = code[pos + 1] & 0xff; - switch (op) { - case Opcode.ILOAD : - doWIDE_XLOAD(pos, code, INTEGER); - break; - case Opcode.LLOAD : - doWIDE_XLOAD(pos, code, LONG); - break; - case Opcode.FLOAD : - doWIDE_XLOAD(pos, code, FLOAT); - break; - case Opcode.DLOAD : - doWIDE_XLOAD(pos, code, DOUBLE); - break; - case Opcode.ALOAD : { - int index = ByteArray.readU16bit(code, pos + 2); - doALOAD(index); - break; } - case Opcode.ISTORE : - doWIDE_STORE(pos, code, INTEGER); - break; - case Opcode.LSTORE : - doWIDE_STORE(pos, code, LONG); - break; - case Opcode.FSTORE : - doWIDE_STORE(pos, code, FLOAT); - break; - case Opcode.DSTORE : - doWIDE_STORE(pos, code, DOUBLE); - break; - case Opcode.ASTORE : { - int index = ByteArray.readU16bit(code, pos + 2); - doASTORE(index); - break; } - case Opcode.IINC : - // this does not call writeLocal(). - return 6; - case Opcode.RET : - visitRET(pos, code); - break; - default : - throw new RuntimeException("bad WIDE instruction: " + op); - } - - return 4; - } - - private void doWIDE_XLOAD(int pos, byte[] code, TypeData type) { - int index = ByteArray.readU16bit(code, pos + 2); - doXLOAD(index, type); - } - - private void doWIDE_STORE(int pos, byte[] code, TypeData type) { - int index = ByteArray.readU16bit(code, pos + 2); - doXSTORE(index, type); - } - - private int doPutField(int pos, byte[] code, boolean notStatic) throws BadBytecode { - int index = ByteArray.readU16bit(code, pos + 1); - String desc = cpool.getFieldrefType(index); - stackTop -= Descriptor.dataSize(desc); - char c = desc.charAt(0); - if (c == 'L') - stackTypes[stackTop].setType(getFieldClassName(desc, 0), classPool); - else if (c == '[') - stackTypes[stackTop].setType(desc, classPool); - - setFieldTarget(notStatic, index); - return 3; - } - - private int doGetField(int pos, byte[] code, boolean notStatic) throws BadBytecode { - int index = ByteArray.readU16bit(code, pos + 1); - setFieldTarget(notStatic, index); - String desc = cpool.getFieldrefType(index); - pushMemberType(desc); - return 3; - } - - private void setFieldTarget(boolean notStatic, int index) throws BadBytecode { - if (notStatic) { - String className = cpool.getFieldrefClassName(index); - stackTypes[--stackTop].setType(className, classPool); - } - } - - private int doNEWARRAY(int pos, byte[] code) { - int s = stackTop - 1; - String type; - switch (code[pos + 1] & 0xff) { - case Opcode.T_BOOLEAN : - type = "[Z"; - break; - case Opcode.T_CHAR : - type = "[C"; - break; - case Opcode.T_FLOAT : - type = "[F"; - break; - case Opcode.T_DOUBLE : - type = "[D"; - break; - case Opcode.T_BYTE : - type = "[B"; - break; - case Opcode.T_SHORT : - type = "[S"; - break; - case Opcode.T_INT : - type = "[I"; - break; - case Opcode.T_LONG : - type = "[J"; - break; - default : - throw new RuntimeException("bad newarray"); - } - - stackTypes[s] = new TypeData.ClassName(type); - return 2; - } - - private int doMultiANewArray(int pos, byte[] code) { - int i = ByteArray.readU16bit(code, pos + 1); - int dim = code[pos + 3] & 0xff; - stackTop -= dim - 1; - - String type = cpool.getClassInfo(i).replace('.', '/'); - stackTypes[stackTop - 1] = new TypeData.ClassName(type); - return 4; - } - - private int doInvokeMethod(int pos, byte[] code, boolean notStatic) throws BadBytecode { - int i = ByteArray.readU16bit(code, pos + 1); - String desc = cpool.getMethodrefType(i); - checkParamTypes(desc, 1); - if (notStatic) { - String className = cpool.getMethodrefClassName(i); - TypeData target = stackTypes[--stackTop]; - if (target instanceof TypeData.UninitTypeVar && target.isUninit()) - constructorCalled(target, ((TypeData.UninitTypeVar)target).offset()); - else if (target instanceof TypeData.UninitData) - constructorCalled(target, ((TypeData.UninitData)target).offset()); - - target.setType(className, classPool); - } - - pushMemberType(desc); - return 3; - } - - /* This is a constructor call on an uninitialized object. - * Sets flags of other references to that object. - * - * @param offset the offset where the object has been created. - */ - private void constructorCalled(TypeData target, int offset) { - target.constructorCalled(offset); - for (int i = 0; i < stackTop; i++) - stackTypes[i].constructorCalled(offset); - - for (int i = 0; i < localsTypes.length; i++) - localsTypes[i].constructorCalled(offset); - } - - private int doInvokeIntfMethod(int pos, byte[] code) throws BadBytecode { - int i = ByteArray.readU16bit(code, pos + 1); - String desc = cpool.getInterfaceMethodrefType(i); - checkParamTypes(desc, 1); - String className = cpool.getInterfaceMethodrefClassName(i); - stackTypes[--stackTop].setType(className, classPool); - pushMemberType(desc); - return 5; - } - - private int doInvokeDynamic(int pos, byte[] code) throws BadBytecode { - int i = ByteArray.readU16bit(code, pos + 1); - String desc = cpool.getInvokeDynamicType(i); - checkParamTypes(desc, 1); - - // assume CosntPool#REF_invokeStatic - /* TypeData target = stackTypes[--stackTop]; - if (target instanceof TypeData.UninitTypeVar && target.isUninit()) - constructorCalled((TypeData.UninitTypeVar)target); - */ - - pushMemberType(desc); - return 5; - } - - private void pushMemberType(String descriptor) { - int top = 0; - if (descriptor.charAt(0) == '(') { - top = descriptor.indexOf(')') + 1; - if (top < 1) - throw new IndexOutOfBoundsException("bad descriptor: " - + descriptor); - } - - TypeData[] types = stackTypes; - int index = stackTop; - switch (descriptor.charAt(top)) { - case '[' : - types[index] = new TypeData.ClassName(descriptor.substring(top)); - break; - case 'L' : - types[index] = new TypeData.ClassName(getFieldClassName(descriptor, top)); - break; - case 'J' : - types[index] = LONG; - types[index + 1] = TOP; - stackTop += 2; - return; - case 'F' : - types[index] = FLOAT; - break; - case 'D' : - types[index] = DOUBLE; - types[index + 1] = TOP; - stackTop += 2; - return; - case 'V' : - return; - default : // C, B, S, I, Z - types[index] = INTEGER; - break; - } - - stackTop++; - } - - private static String getFieldClassName(String desc, int index) { - return desc.substring(index + 1, desc.length() - 1).replace('/', '.'); - } - - private void checkParamTypes(String desc, int i) throws BadBytecode { - char c = desc.charAt(i); - if (c == ')') - return; - - int k = i; - boolean array = false; - while (c == '[') { - array = true; - c = desc.charAt(++k); - } - - if (c == 'L') { - k = desc.indexOf(';', k) + 1; - if (k <= 0) - throw new IndexOutOfBoundsException("bad descriptor"); - } - else - k++; - - checkParamTypes(desc, k); - if (!array && (c == 'J' || c == 'D')) - stackTop -= 2; - else - stackTop--; - - if (array) - stackTypes[stackTop].setType(desc.substring(i, k), classPool); - else if (c == 'L') - stackTypes[stackTop].setType(desc.substring(i + 1, k - 1).replace('/', '.'), - classPool); - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java deleted file mode 100644 index afab68c..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java +++ /dev/null @@ -1,785 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.StackMapTable; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import java.util.HashSet; -import java.util.Iterator; -import java.util.ArrayList; - -public abstract class TypeData { - /* Memo: - * array type is a subtype of Cloneable and Serializable - */ - - public static TypeData[] make(int size) { - TypeData[] array = new TypeData[size]; - for (int i = 0; i < size; i++) - array[i] = TypeTag.TOP; - - return array; - } - - protected TypeData() {} - - /** - * Sets the type name of this object type. If the given type name is - * a subclass of the current type name, then the given name becomes - * the name of this object type. - * - * @param className dot-separated name unless the type is an array type. - */ - private static void setType(TypeData td, String className, ClassPool cp) throws BadBytecode { - td.setType(className, cp); - } - - public abstract int getTypeTag(); - public abstract int getTypeData(ConstPool cp); - - public TypeData join() { return new TypeVar(this); } - - /** - * If the type is a basic type, this method normalizes the type - * and returns a BasicType object. Otherwise, it returns null. - */ - public abstract BasicType isBasicType(); - - public abstract boolean is2WordType(); - - /** - * Returns false if getName() returns a valid type name. - */ - public boolean isNullType() { return false; } - - public boolean isUninit() { return false; } - - public abstract boolean eq(TypeData d); - - public abstract String getName(); - public abstract void setType(String s, ClassPool cp) throws BadBytecode; - - // depth-first search - public int dfs(ArrayList order, int index, ClassPool cp) - throws NotFoundException - { - return index; - } - - /** - * Returns this if it is a TypeVar or a TypeVar that this - * type depends on. Otherwise, this method returns null. - * It is used by dfs(). - */ - protected TypeVar toTypeVar() { return null; } - - // see UninitTypeVar and UninitData - public void constructorCalled(int offset) {} - - /** - * Primitive types. - */ - protected static class BasicType extends TypeData { - private String name; - private int typeTag; - - public BasicType(String type, int tag) { - name = type; - typeTag = tag; - } - - public int getTypeTag() { return typeTag; } - public int getTypeData(ConstPool cp) { return 0; } - - public TypeData join() { - if (this == TypeTag.TOP) - return this; - else - return super.join(); - } - - public BasicType isBasicType() { return this; } - - public boolean is2WordType() { - return typeTag == StackMapTable.LONG - || typeTag == StackMapTable.DOUBLE; - } - - public boolean eq(TypeData d) { return this == d; } - - public String getName() { - return name; - } - - public void setType(String s, ClassPool cp) throws BadBytecode { - throw new BadBytecode("conflict: " + name + " and " + s); - } - - public String toString() { return name; } - } - - // a type variable - public static abstract class AbsTypeVar extends TypeData { - public AbsTypeVar() {} - public abstract void merge(TypeData t); - public int getTypeTag() { return StackMapTable.OBJECT; } - - public int getTypeData(ConstPool cp) { - return cp.addClassInfo(getName()); - } - - public boolean eq(TypeData d) { return getName().equals(d.getName()); } - } - - /* a type variable representing a class type or a basic type. - */ - public static class TypeVar extends AbsTypeVar { - protected ArrayList lowers; // lower bounds of this type. ArrayList - protected ArrayList usedBy; // reverse relations of lowers - protected ArrayList uppers; // upper bounds of this type. - protected String fixedType; - private boolean is2WordType; // cache - - public TypeVar(TypeData t) { - uppers = null; - lowers = new ArrayList(2); - usedBy = new ArrayList(2); - merge(t); - fixedType = null; - is2WordType = t.is2WordType(); - } - - public String getName() { - if (fixedType == null) - return ((TypeData)lowers.get(0)).getName(); - else - return fixedType; - } - - public BasicType isBasicType() { - if (fixedType == null) - return ((TypeData)lowers.get(0)).isBasicType(); - else - return null; - } - - public boolean is2WordType() { - if (fixedType == null) { - return is2WordType; - // return ((TypeData)lowers.get(0)).is2WordType(); - } - else - return false; - } - - public boolean isNullType() { - if (fixedType == null) - return ((TypeData)lowers.get(0)).isNullType(); - else - return false; - } - - public boolean isUninit() { - if (fixedType == null) - return ((TypeData)lowers.get(0)).isUninit(); - else - return false; - } - - public void merge(TypeData t) { - lowers.add(t); - if (t instanceof TypeVar) - ((TypeVar)t).usedBy.add(this); - } - - public int getTypeTag() { - /* If fixedType is null after calling dfs(), then this - type is NULL, Uninit, or a basic type. So call - getTypeTag() on the first element of lowers. */ - if (fixedType == null) - return ((TypeData)lowers.get(0)).getTypeTag(); - else - return super.getTypeTag(); - } - - public int getTypeData(ConstPool cp) { - if (fixedType == null) - return ((TypeData)lowers.get(0)).getTypeData(cp); - else - return super.getTypeData(cp); - } - - public void setType(String typeName, ClassPool cp) throws BadBytecode { - if (uppers == null) - uppers = new ArrayList(); - - uppers.add(typeName); - } - - protected TypeVar toTypeVar() { return this; } - - private int visited = 0; - private int smallest = 0; - private boolean inList = false; - - // depth-first serach - public int dfs(ArrayList preOrder, int index, ClassPool cp) throws NotFoundException { - if (visited > 0) - return index; // MapMaker.make() may call an already visited node. - - visited = smallest = ++index; - preOrder.add(this); - inList = true; - int n = lowers.size(); - for (int i = 0; i < n; i++) { - TypeVar child = ((TypeData)lowers.get(i)).toTypeVar(); - if (child != null) - if (child.visited == 0) { - index = child.dfs(preOrder, index, cp); - if (child.smallest < smallest) - smallest = child.smallest; - } - else if (child.inList) - if (child.visited < smallest) - smallest = child.visited; - } - - if (visited == smallest) { - ArrayList scc = new ArrayList(); // strongly connected component - TypeVar cv; - do { - cv = (TypeVar)preOrder.remove(preOrder.size() - 1); - cv.inList = false; - scc.add(cv); - } while (cv != this); - fixTypes(scc, cp); - } - - return index; - } - - private void fixTypes(ArrayList scc, ClassPool cp) throws NotFoundException { - HashSet lowersSet = new HashSet(); - boolean isBasicType = false; - TypeData kind = null; - int size = scc.size(); - for (int i = 0; i < size; i++) { - ArrayList tds = ((TypeVar)scc.get(i)).lowers; - int size2 = tds.size(); - for (int j = 0; j < size2; j++) { - TypeData d = (TypeData)tds.get(j); - BasicType bt = d.isBasicType(); - if (kind == null) { - if (bt == null) { - isBasicType = false; - kind = d; - /* If scc has only an UninitData, fixedType is kept null. - So lowerSet must be empty. If scc has not only an UninitData - but also another TypeData, an error must be thrown but this - error detection has not been implemented. */ - if (d.isUninit()) - break; - } - else { - isBasicType = true; - kind = bt; - } - } - else { - if ((bt == null && isBasicType) - || (bt != null && kind != bt)) { - isBasicType = true; - kind = TypeTag.TOP; - break; - } - } - - if (bt == null && !d.isNullType()) - lowersSet.add(d.getName()); - } - } - - if (isBasicType) { - for (int i = 0; i < size; i++) { - TypeVar cv = (TypeVar)scc.get(i); - cv.lowers.clear(); - cv.lowers.add(kind); - is2WordType = kind.is2WordType(); - } - } - else { - String typeName = fixTypes2(scc, lowersSet, cp); - for (int i = 0; i < size; i++) { - TypeVar cv = (TypeVar)scc.get(i); - cv.fixedType = typeName; - } - } - } - - private String fixTypes2(ArrayList scc, HashSet lowersSet, ClassPool cp) throws NotFoundException { - Iterator it = lowersSet.iterator(); - if (lowersSet.size() == 0) - return null; // only NullType - else if (lowersSet.size() == 1) - return (String)it.next(); - else { - CtClass cc = cp.get((String)it.next()); - while (it.hasNext()) - cc = commonSuperClassEx(cc, cp.get((String)it.next())); - - if (cc.getSuperclass() == null || isObjectArray(cc)) - cc = fixByUppers(scc, cp, new HashSet(), cc); - - if (cc.isArray()) - return Descriptor.toJvmName(cc); - else - return cc.getName(); - } - } - - private static boolean isObjectArray(CtClass cc) throws NotFoundException { - return cc.isArray() && cc.getComponentType().getSuperclass() == null; - } - - private CtClass fixByUppers(ArrayList users, ClassPool cp, HashSet visited, CtClass type) - throws NotFoundException - { - if (users == null) - return type; - - int size = users.size(); - for (int i = 0; i < size; i++) { - TypeVar t = (TypeVar)users.get(i); - if (!visited.add(t)) - return type; - - if (t.uppers != null) { - int s = t.uppers.size(); - for (int k = 0; k < s; k++) { - CtClass cc = cp.get((String)t.uppers.get(k)); - if (cc.subtypeOf(type)) - type = cc; - } - } - - type = fixByUppers(t.usedBy, cp, visited, type); - } - - return type; - } - } - - /** - * Finds the most specific common super class of the given classes - * by considering array types. - */ - public static CtClass commonSuperClassEx(CtClass one, CtClass two) throws NotFoundException { - if (one == two) - return one; - else if (one.isArray() && two.isArray()) { - CtClass ele1 = one.getComponentType(); - CtClass ele2 = two.getComponentType(); - CtClass element = commonSuperClassEx(ele1, ele2); - if (element == ele1) - return one; - else if (element == ele2) - return two; - else - return one.getClassPool().get(element == null ? "java.lang.Object" - : element.getName() + "[]"); - } - else if (one.isPrimitive() || two.isPrimitive()) - return null; // TOP - else if (one.isArray() || two.isArray()) // but !(one.isArray() && two.isArray()) - return one.getClassPool().get("java.lang.Object"); - else - return commonSuperClass(one, two); - } - - /** - * Finds the most specific common super class of the given classes. - * This method is a copy from javassist.bytecode.analysis.Type. - */ - public static CtClass commonSuperClass(CtClass one, CtClass two) throws NotFoundException { - CtClass deep = one; - CtClass shallow = two; - CtClass backupShallow = shallow; - CtClass backupDeep = deep; - - // Phase 1 - Find the deepest hierarchy, set deep and shallow correctly - for (;;) { - // In case we get lucky, and find a match early - if (eq(deep, shallow) && deep.getSuperclass() != null) - return deep; - - CtClass deepSuper = deep.getSuperclass(); - CtClass shallowSuper = shallow.getSuperclass(); - - if (shallowSuper == null) { - // right, now reset shallow - shallow = backupShallow; - break; - } - - if (deepSuper == null) { - // wrong, swap them, since deep is now useless, its our tmp before we swap it - deep = backupDeep; - backupDeep = backupShallow; - backupShallow = deep; - - deep = shallow; - shallow = backupShallow; - break; - } - - deep = deepSuper; - shallow = shallowSuper; - } - - // Phase 2 - Move deepBackup up by (deep end - deep) - for (;;) { - deep = deep.getSuperclass(); - if (deep == null) - break; - - backupDeep = backupDeep.getSuperclass(); - } - - deep = backupDeep; - - // Phase 3 - The hierarchy positions are now aligned - // The common super class is easy to find now - while (!eq(deep, shallow)) { - deep = deep.getSuperclass(); - shallow = shallow.getSuperclass(); - } - - return deep; - } - - static boolean eq(CtClass one, CtClass two) { - return one == two || (one != null && two != null && one.getName().equals(two.getName())); - } - - public static void aastore(TypeData array, TypeData value, ClassPool cp) throws BadBytecode { - if (array instanceof AbsTypeVar) - if (!value.isNullType()) - ((AbsTypeVar)array).merge(ArrayType.make(value)); - - if (value instanceof AbsTypeVar) - if (array instanceof AbsTypeVar) - ArrayElement.make(array); // should call value.setType() later. - else if (array instanceof ClassName) { - if (!array.isNullType()) { - String type = ArrayElement.typeName(array.getName()); - value.setType(type, cp); - } - } - else - throw new BadBytecode("bad AASTORE: " + array); - } - - /* A type variable representing an array type. - * It is a decorator of another type variable. - */ - public static class ArrayType extends AbsTypeVar { - private AbsTypeVar element; - - private ArrayType(AbsTypeVar elementType) { - element = elementType; - } - - static TypeData make(TypeData element) throws BadBytecode { - if (element instanceof ArrayElement) - return ((ArrayElement)element).arrayType(); - else if (element instanceof AbsTypeVar) - return new ArrayType((AbsTypeVar)element); - else if (element instanceof ClassName) - if (!element.isNullType()) - return new ClassName(typeName(element.getName())); - - throw new BadBytecode("bad AASTORE: " + element); - } - - public void merge(TypeData t) { - try { - if (!t.isNullType()) - element.merge(ArrayElement.make(t)); - } - catch (BadBytecode e) { - // never happens - throw new RuntimeException("fatal: " + e); - } - } - - public String getName() { - return typeName(element.getName()); - } - - public AbsTypeVar elementType() { return element; } - - public BasicType isBasicType() { return null; } - public boolean is2WordType() { return false; } - - /* elementType must be a class name. Basic type names - * are not allowed. - */ - public static String typeName(String elementType) { - if (elementType.charAt(0) == '[') - return "[" + elementType; - else - return "[L" + elementType.replace('.', '/') + ";"; - } - - public void setType(String s, ClassPool cp) throws BadBytecode { - element.setType(ArrayElement.typeName(s), cp); - } - - protected TypeVar toTypeVar() { return element.toTypeVar(); } - - public int dfs(ArrayList order, int index, ClassPool cp) throws NotFoundException { - return element.dfs(order, index, cp); - } - } - - /* A type variable representing an array-element type. - * It is a decorator of another type variable. - */ - public static class ArrayElement extends AbsTypeVar { - private AbsTypeVar array; - - private ArrayElement(AbsTypeVar a) { // a is never null - array = a; - } - - public static TypeData make(TypeData array) throws BadBytecode { - if (array instanceof ArrayType) - return ((ArrayType)array).elementType(); - else if (array instanceof AbsTypeVar) - return new ArrayElement((AbsTypeVar)array); - else if (array instanceof ClassName) - if (!array.isNullType()) - return new ClassName(typeName(array.getName())); - - throw new BadBytecode("bad AASTORE: " + array); - } - - public void merge(TypeData t) { - try { - if (!t.isNullType()) - array.merge(ArrayType.make(t)); - } - catch (BadBytecode e) { - // never happens - throw new RuntimeException("fatal: " + e); - } - } - - public String getName() { - return typeName(array.getName()); - } - - public AbsTypeVar arrayType() { return array; } - - /* arrayType must be a class name. Basic type names are - * not allowed. - */ - - public BasicType isBasicType() { return null; } - - public boolean is2WordType() { return false; } - - private static String typeName(String arrayType) { - if (arrayType.length() > 1 && arrayType.charAt(0) == '[') { - char c = arrayType.charAt(1); - if (c == 'L') - return arrayType.substring(2, arrayType.length() - 1).replace('/', '.'); - else if (c == '[') - return arrayType.substring(1); - } - - return "java.lang.Object"; // the array type may be NullType - } - - public void setType(String s, ClassPool cp) throws BadBytecode { - array.setType(ArrayType.typeName(s), cp); - } - - protected TypeVar toTypeVar() { return array.toTypeVar(); } - - public int dfs(ArrayList order, int index, ClassPool cp) throws NotFoundException { - return array.dfs(order, index, cp); - } - } - - public static class UninitTypeVar extends AbsTypeVar { - protected TypeData type; // UninitData or TOP - - public UninitTypeVar(UninitData t) { type = t; } - public int getTypeTag() { return type.getTypeTag(); } - public int getTypeData(ConstPool cp) { return type.getTypeData(cp); } - public BasicType isBasicType() { return type.isBasicType(); } - public boolean is2WordType() { return type.is2WordType(); } - public boolean isUninit() { return type.isUninit(); } - public boolean eq(TypeData d) { return type.eq(d); } - public String getName() { return type.getName(); } - - protected TypeVar toTypeVar() { return null; } - public TypeData join() { return type.join(); } - - public void setType(String s, ClassPool cp) throws BadBytecode { - type.setType(s, cp); - } - - public void merge(TypeData t) { - if (!t.eq(type)) - type = TypeTag.TOP; - } - - public void constructorCalled(int offset) { - type.constructorCalled(offset); - } - - public int offset() { - if (type instanceof UninitData) - return ((UninitData)type).offset; - else // if type == TypeTag.TOP - throw new RuntimeException("not available"); - } - } - - /** - * Type data for OBJECT. - */ - public static class ClassName extends TypeData { - private String name; // dot separated. - - public ClassName(String n) { - name = n; - } - - public String getName() { - return name; - } - - public BasicType isBasicType() { return null; } - - public boolean is2WordType() { return false; } - - public int getTypeTag() { return StackMapTable.OBJECT; } - - public int getTypeData(ConstPool cp) { - return cp.addClassInfo(getName()); - } - - public boolean eq(TypeData d) { return name.equals(d.getName()); } - - public void setType(String typeName, ClassPool cp) throws BadBytecode {} - } - - /** - * Type data for NULL or OBJECT. - * The types represented by the instances of this class are - * initially NULL but will be OBJECT. - */ - public static class NullType extends ClassName { - public NullType() { - super("null-type"); // type name - } - - public int getTypeTag() { - return StackMapTable.NULL; - } - - public boolean isNullType() { return true; } - public int getTypeData(ConstPool cp) { return 0; } - } - - /** - * Type data for UNINIT. - */ - public static class UninitData extends ClassName { - int offset; - boolean initialized; - - UninitData(int offset, String className) { - super(className); - this.offset = offset; - this.initialized = false; - } - - public UninitData copy() { return new UninitData(offset, getName()); } - - public int getTypeTag() { - return StackMapTable.UNINIT; - } - - public int getTypeData(ConstPool cp) { - return offset; - } - - public TypeData join() { - if (initialized) - return new TypeVar(new ClassName(getName())); - else - return new UninitTypeVar(copy()); - } - - public boolean isUninit() { return true; } - - public boolean eq(TypeData d) { - if (d instanceof UninitData) { - UninitData ud = (UninitData)d; - return offset == ud.offset && getName().equals(ud.getName()); - } - else - return false; - } - - public String toString() { return "uninit:" + getName() + "@" + offset; } - - public int offset() { return offset; } - - public void constructorCalled(int offset) { - if (offset == this.offset) - initialized = true; - } - } - - public static class UninitThis extends UninitData { - UninitThis(String className) { - super(-1, className); - } - - public UninitData copy() { return new UninitThis(getName()); } - - public int getTypeTag() { - return StackMapTable.THIS; - } - - public int getTypeData(ConstPool cp) { - return 0; - } - - public String toString() { return "uninit:this"; } - } -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java deleted file mode 100644 index 89aa4e3..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import com.wenshuo.agent.javassist.bytecode.StackMapTable; - -public interface TypeTag { - String TOP_TYPE = "*top*"; - TypeData TOP = new TypeData.BasicType(TOP_TYPE, StackMapTable.TOP); - TypeData INTEGER = new TypeData.BasicType("int", StackMapTable.INTEGER); - TypeData FLOAT = new TypeData.BasicType("float", StackMapTable.FLOAT); - TypeData DOUBLE = new TypeData.BasicType("double", StackMapTable.DOUBLE); - TypeData LONG = new TypeData.BasicType("long", StackMapTable.LONG); - - // and NULL, THIS, OBJECT, UNINIT -} diff --git a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java b/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java deleted file mode 100644 index 631bfbd..0000000 --- a/src/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java +++ /dev/null @@ -1,234 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.bytecode.stackmap; - -import com.wenshuo.agent.javassist.bytecode.*; - -public class TypedBlock extends BasicBlock { - public int stackTop, numLocals; - // localsTypes is set to non-null when this block is first visited by a MapMaker. - // see alreadySet(). - public TypeData[] localsTypes; - public TypeData[] stackTypes; - - /** - * Divides the method body into basic blocks. - * The type information of the first block is initialized. - * - * @param optimize if it is true and the method does not include - * branches, this method returns null. - */ - public static TypedBlock[] makeBlocks(MethodInfo minfo, CodeAttribute ca, - boolean optimize) - throws BadBytecode - { - TypedBlock[] blocks = (TypedBlock[])new Maker().make(minfo); - if (optimize && blocks.length < 2) - if (blocks.length == 0 || blocks[0].incoming == 0) - return null; - - ConstPool pool = minfo.getConstPool(); - boolean isStatic = (minfo.getAccessFlags() & AccessFlag.STATIC) != 0; - blocks[0].initFirstBlock(ca.getMaxStack(), ca.getMaxLocals(), - pool.getClassName(), minfo.getDescriptor(), - isStatic, minfo.isConstructor()); - return blocks; - } - - protected TypedBlock(int pos) { - super(pos); - localsTypes = null; - } - - protected void toString2(StringBuffer sbuf) { - super.toString2(sbuf); - sbuf.append(",\n stack={"); - printTypes(sbuf, stackTop, stackTypes); - sbuf.append("}, locals={"); - printTypes(sbuf, numLocals, localsTypes); - sbuf.append('}'); - } - - private void printTypes(StringBuffer sbuf, int size, - TypeData[] types) { - if (types == null) - return; - - for (int i = 0; i < size; i++) { - if (i > 0) - sbuf.append(", "); - - TypeData td = types[i]; - sbuf.append(td == null ? "<>" : td.toString()); - } - } - - public boolean alreadySet() { - return localsTypes != null; - } - - public void setStackMap(int st, TypeData[] stack, int nl, TypeData[] locals) - throws BadBytecode - { - stackTop = st; - stackTypes = stack; - numLocals = nl; - localsTypes = locals; - } - - /* - * Computes the correct value of numLocals. - */ - public void resetNumLocals() { - if (localsTypes != null) { - int nl = localsTypes.length; - while (nl > 0 && localsTypes[nl - 1].isBasicType() == TypeTag.TOP) { - if (nl > 1) { - if (localsTypes[nl - 2].is2WordType()) - break; - } - - --nl; - } - - numLocals = nl; - } - } - - public static class Maker extends BasicBlock.Maker { - protected BasicBlock makeBlock(int pos) { - return new TypedBlock(pos); - } - - protected BasicBlock[] makeArray(int size) { - return new TypedBlock[size]; - } - } - - /** - * Initializes the first block by the given method descriptor. - * - * @param block the first basic block that this method initializes. - * @param className a dot-separated fully qualified class name. - * For example, javassist.bytecode.stackmap.BasicBlock. - * @param methodDesc method descriptor. - * @param isStatic true if the method is a static method. - * @param isConstructor true if the method is a constructor. - */ - void initFirstBlock(int maxStack, int maxLocals, String className, - String methodDesc, boolean isStatic, boolean isConstructor) - throws BadBytecode - { - if (methodDesc.charAt(0) != '(') - throw new BadBytecode("no method descriptor: " + methodDesc); - - stackTop = 0; - stackTypes = TypeData.make(maxStack); - TypeData[] locals = TypeData.make(maxLocals); - if (isConstructor) - locals[0] = new TypeData.UninitThis(className); - else if (!isStatic) - locals[0] = new TypeData.ClassName(className); - - int n = isStatic ? -1 : 0; - int i = 1; - try { - while ((i = descToTag(methodDesc, i, ++n, locals)) > 0) - if (locals[n].is2WordType()) - locals[++n] = TypeTag.TOP; - } - catch (StringIndexOutOfBoundsException e) { - throw new BadBytecode("bad method descriptor: " - + methodDesc); - } - - numLocals = n; - localsTypes = locals; - } - - private static int descToTag(String desc, int i, - int n, TypeData[] types) - throws BadBytecode - { - int i0 = i; - int arrayDim = 0; - char c = desc.charAt(i); - if (c == ')') - return 0; - - while (c == '[') { - ++arrayDim; - c = desc.charAt(++i); - } - - if (c == 'L') { - int i2 = desc.indexOf(';', ++i); - if (arrayDim > 0) - types[n] = new TypeData.ClassName(desc.substring(i0, ++i2)); - else - types[n] = new TypeData.ClassName(desc.substring(i0 + 1, ++i2 - 1) - .replace('/', '.')); - return i2; - } - else if (arrayDim > 0) { - types[n] = new TypeData.ClassName(desc.substring(i0, ++i)); - return i; - } - else { - TypeData t = toPrimitiveTag(c); - if (t == null) - throw new BadBytecode("bad method descriptor: " + desc); - - types[n] = t; - return i + 1; - } - } - - private static TypeData toPrimitiveTag(char c) { - switch (c) { - case 'Z' : - case 'C' : - case 'B' : - case 'S' : - case 'I' : - return TypeTag.INTEGER; - case 'J' : - return TypeTag.LONG; - case 'F' : - return TypeTag.FLOAT; - case 'D' : - return TypeTag.DOUBLE; - case 'V' : - default : - return null; - } - } - - public static String getRetType(String desc) { - int i = desc.indexOf(')'); - if (i < 0) - return "java.lang.Object"; - - char c = desc.charAt(i + 1); - if (c == '[') - return desc.substring(i + 1); - else if (c == 'L') - return desc.substring(i + 2, desc.length() - 1).replace('/', '.'); - else - return "java.lang.Object"; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/AccessorMaker.java b/src/com/wenshuo/agent/javassist/compiler/AccessorMaker.java deleted file mode 100644 index f35025f..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/AccessorMaker.java +++ /dev/null @@ -1,260 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import java.util.HashMap; - -/** - * AccessorMaker maintains accessors to private members of an enclosing - * class. It is necessary for compiling a method in an inner class. - */ -public class AccessorMaker { - private CtClass clazz; - private int uniqueNumber; - private HashMap accessors; - - static final String lastParamType = "javassist.runtime.Inner"; - - public AccessorMaker(CtClass c) { - clazz = c; - uniqueNumber = 1; - accessors = new HashMap(); - } - - public String getConstructor(CtClass c, String desc, MethodInfo orig) - throws CompileError - { - String key = ":" + desc; - String consDesc = (String)accessors.get(key); - if (consDesc != null) - return consDesc; // already exists. - - consDesc = Descriptor.appendParameter(lastParamType, desc); - ClassFile cf = clazz.getClassFile(); // turn on the modified flag. - try { - ConstPool cp = cf.getConstPool(); - ClassPool pool = clazz.getClassPool(); - MethodInfo minfo - = new MethodInfo(cp, MethodInfo.nameInit, consDesc); - minfo.setAccessFlags(0); - minfo.addAttribute(new SyntheticAttribute(cp)); - ExceptionsAttribute ea = orig.getExceptionsAttribute(); - if (ea != null) - minfo.addAttribute(ea.copy(cp, null)); - - CtClass[] params = Descriptor.getParameterTypes(desc, pool); - Bytecode code = new Bytecode(cp); - code.addAload(0); - int regno = 1; - for (int i = 0; i < params.length; ++i) - regno += code.addLoad(regno, params[i]); - code.setMaxLocals(regno + 1); // the last parameter is added. - code.addInvokespecial(clazz, MethodInfo.nameInit, desc); - - code.addReturn(null); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - } - catch (CannotCompileException e) { - throw new CompileError(e); - } - catch (NotFoundException e) { - throw new CompileError(e); - } - - accessors.put(key, consDesc); - return consDesc; - } - - /** - * Returns the name of the method for accessing a private method. - * - * @param name the name of the private method. - * @param desc the descriptor of the private method. - * @param accDesc the descriptor of the accessor method. The first - * parameter type is clazz. - * If the private method is static, - * accDesc must be identical to desc. - * - * @param orig the method info of the private method. - * @return - */ - public String getMethodAccessor(String name, String desc, String accDesc, - MethodInfo orig) - throws CompileError - { - String key = name + ":" + desc; - String accName = (String)accessors.get(key); - if (accName != null) - return accName; // already exists. - - ClassFile cf = clazz.getClassFile(); // turn on the modified flag. - accName = findAccessorName(cf); - try { - ConstPool cp = cf.getConstPool(); - ClassPool pool = clazz.getClassPool(); - MethodInfo minfo - = new MethodInfo(cp, accName, accDesc); - minfo.setAccessFlags(AccessFlag.STATIC); - minfo.addAttribute(new SyntheticAttribute(cp)); - ExceptionsAttribute ea = orig.getExceptionsAttribute(); - if (ea != null) - minfo.addAttribute(ea.copy(cp, null)); - - CtClass[] params = Descriptor.getParameterTypes(accDesc, pool); - int regno = 0; - Bytecode code = new Bytecode(cp); - for (int i = 0; i < params.length; ++i) - regno += code.addLoad(regno, params[i]); - - code.setMaxLocals(regno); - if (desc == accDesc) - code.addInvokestatic(clazz, name, desc); - else - code.addInvokevirtual(clazz, name, desc); - - code.addReturn(Descriptor.getReturnType(desc, pool)); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - } - catch (CannotCompileException e) { - throw new CompileError(e); - } - catch (NotFoundException e) { - throw new CompileError(e); - } - - accessors.put(key, accName); - return accName; - } - - /** - * Returns the method_info representing the added getter. - */ - public MethodInfo getFieldGetter(FieldInfo finfo, boolean is_static) - throws CompileError - { - String fieldName = finfo.getName(); - String key = fieldName + ":getter"; - Object res = accessors.get(key); - if (res != null) - return (MethodInfo)res; // already exists. - - ClassFile cf = clazz.getClassFile(); // turn on the modified flag. - String accName = findAccessorName(cf); - try { - ConstPool cp = cf.getConstPool(); - ClassPool pool = clazz.getClassPool(); - String fieldType = finfo.getDescriptor(); - String accDesc; - if (is_static) - accDesc = "()" + fieldType; - else - accDesc = "(" + Descriptor.of(clazz) + ")" + fieldType; - - MethodInfo minfo = new MethodInfo(cp, accName, accDesc); - minfo.setAccessFlags(AccessFlag.STATIC); - minfo.addAttribute(new SyntheticAttribute(cp)); - Bytecode code = new Bytecode(cp); - if (is_static) { - code.addGetstatic(Bytecode.THIS, fieldName, fieldType); - } - else { - code.addAload(0); - code.addGetfield(Bytecode.THIS, fieldName, fieldType); - code.setMaxLocals(1); - } - - code.addReturn(Descriptor.toCtClass(fieldType, pool)); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - accessors.put(key, minfo); - return minfo; - } - catch (CannotCompileException e) { - throw new CompileError(e); - } - catch (NotFoundException e) { - throw new CompileError(e); - } - } - - /** - * Returns the method_info representing the added setter. - */ - public MethodInfo getFieldSetter(FieldInfo finfo, boolean is_static) - throws CompileError - { - String fieldName = finfo.getName(); - String key = fieldName + ":setter"; - Object res = accessors.get(key); - if (res != null) - return (MethodInfo)res; // already exists. - - ClassFile cf = clazz.getClassFile(); // turn on the modified flag. - String accName = findAccessorName(cf); - try { - ConstPool cp = cf.getConstPool(); - ClassPool pool = clazz.getClassPool(); - String fieldType = finfo.getDescriptor(); - String accDesc; - if (is_static) - accDesc = "(" + fieldType + ")V"; - else - accDesc = "(" + Descriptor.of(clazz) + fieldType + ")V"; - - MethodInfo minfo = new MethodInfo(cp, accName, accDesc); - minfo.setAccessFlags(AccessFlag.STATIC); - minfo.addAttribute(new SyntheticAttribute(cp)); - Bytecode code = new Bytecode(cp); - int reg; - if (is_static) { - reg = code.addLoad(0, Descriptor.toCtClass(fieldType, pool)); - code.addPutstatic(Bytecode.THIS, fieldName, fieldType); - } - else { - code.addAload(0); - reg = code.addLoad(1, Descriptor.toCtClass(fieldType, pool)) - + 1; - code.addPutfield(Bytecode.THIS, fieldName, fieldType); - } - - code.addReturn(null); - code.setMaxLocals(reg); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - accessors.put(key, minfo); - return minfo; - } - catch (CannotCompileException e) { - throw new CompileError(e); - } - catch (NotFoundException e) { - throw new CompileError(e); - } - } - - private String findAccessorName(ClassFile cf) { - String accName; - do { - accName = "access$" + uniqueNumber++; - } while (cf.getMethod(accName) != null); - return accName; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/CodeGen.java b/src/com/wenshuo/agent/javassist/compiler/CodeGen.java deleted file mode 100644 index 3345abc..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/CodeGen.java +++ /dev/null @@ -1,1955 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import java.util.ArrayList; -import java.util.Arrays; -import com.wenshuo.agent.javassist.compiler.ast.*; -import com.wenshuo.agent.javassist.bytecode.*; - -/* The code generator is implemeted by three files: - * CodeGen.java, MemberCodeGen.java, and JvstCodeGen. - * I just wanted to split a big file into three smaller ones. - */ - -public abstract class CodeGen extends Visitor implements Opcode, TokenId { - static final String javaLangObject = "java.lang.Object"; - static final String jvmJavaLangObject = "java/lang/Object"; - - static final String javaLangString = "java.lang.String"; - static final String jvmJavaLangString = "java/lang/String"; - - protected Bytecode bytecode; - private int tempVar; - TypeChecker typeChecker; - - /** - * true if the last visited node is a return statement. - */ - protected boolean hasReturned; - - /** - * Must be true if compilation is for a static method. - */ - public boolean inStaticMethod; - - protected ArrayList breakList, continueList; - - /** - * doit() in ReturnHook is called from atReturn(). - */ - protected static abstract class ReturnHook { - ReturnHook next; - - /** - * Returns true if the generated code ends with return, - * throw, or goto. - */ - protected abstract boolean doit(Bytecode b, int opcode); - - protected ReturnHook(CodeGen gen) { - next = gen.returnHooks; - gen.returnHooks = this; - } - - protected void remove(CodeGen gen) { - gen.returnHooks = next; - } - } - - protected ReturnHook returnHooks; - - /* The following fields are used by atXXX() methods - * for returning the type of the compiled expression. - */ - protected int exprType; // VOID, NULL, CLASS, BOOLEAN, INT, ... - protected int arrayDim; - protected String className; // JVM-internal representation - - public CodeGen(Bytecode b) { - bytecode = b; - tempVar = -1; - typeChecker = null; - hasReturned = false; - inStaticMethod = false; - breakList = null; - continueList = null; - returnHooks = null; - } - - public void setTypeChecker(TypeChecker checker) { - typeChecker = checker; - } - - protected static void fatal() throws CompileError { - throw new CompileError("fatal"); - } - - public static boolean is2word(int type, int dim) { - return dim == 0 && (type == DOUBLE || type == LONG); - } - - public int getMaxLocals() { return bytecode.getMaxLocals(); } - - public void setMaxLocals(int n) { - bytecode.setMaxLocals(n); - } - - protected void incMaxLocals(int size) { - bytecode.incMaxLocals(size); - } - - /** - * Returns a local variable that single or double words can be - * stored in. - */ - protected int getTempVar() { - if (tempVar < 0) { - tempVar = getMaxLocals(); - incMaxLocals(2); - } - - return tempVar; - } - - protected int getLocalVar(Declarator d) { - int v = d.getLocalVar(); - if (v < 0) { - v = getMaxLocals(); // delayed variable allocation. - d.setLocalVar(v); - incMaxLocals(1); - } - - return v; - } - - /** - * Returns the JVM-internal representation of this class name. - */ - protected abstract String getThisName(); - - /** - * Returns the JVM-internal representation of this super class name. - */ - protected abstract String getSuperName() throws CompileError; - - /* Converts a class name into a JVM-internal representation. - * - * It may also expand a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected abstract String resolveClassName(ASTList name) - throws CompileError; - - /* Expands a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected abstract String resolveClassName(String jvmClassName) - throws CompileError; - - /** - * @param name the JVM-internal representation. - * name is not exapnded to java.lang.*. - */ - protected static String toJvmArrayName(String name, int dim) { - if (name == null) - return null; - - if (dim == 0) - return name; - else { - StringBuffer sbuf = new StringBuffer(); - int d = dim; - while (d-- > 0) - sbuf.append('['); - - sbuf.append('L'); - sbuf.append(name); - sbuf.append(';'); - - return sbuf.toString(); - } - } - - protected static String toJvmTypeName(int type, int dim) { - char c = 'I'; - switch(type) { - case BOOLEAN : - c = 'Z'; - break; - case BYTE : - c = 'B'; - break; - case CHAR : - c = 'C'; - break; - case SHORT : - c = 'S'; - break; - case INT : - c = 'I'; - break; - case LONG : - c = 'J'; - break; - case FLOAT : - c = 'F'; - break; - case DOUBLE : - c = 'D'; - break; - case VOID : - c = 'V'; - break; - } - - StringBuffer sbuf = new StringBuffer(); - while (dim-- > 0) - sbuf.append('['); - - sbuf.append(c); - return sbuf.toString(); - } - - public void compileExpr(ASTree expr) throws CompileError { - doTypeCheck(expr); - expr.accept(this); - } - - public boolean compileBooleanExpr(boolean branchIf, ASTree expr) - throws CompileError - { - doTypeCheck(expr); - return booleanExpr(branchIf, expr); - } - - public void doTypeCheck(ASTree expr) throws CompileError { - if (typeChecker != null) - expr.accept(typeChecker); - } - - public void atASTList(ASTList n) throws CompileError { fatal(); } - - public void atPair(Pair n) throws CompileError { fatal(); } - - public void atSymbol(Symbol n) throws CompileError { fatal(); } - - public void atFieldDecl(FieldDecl field) throws CompileError { - field.getInit().accept(this); - } - - public void atMethodDecl(MethodDecl method) throws CompileError { - ASTList mods = method.getModifiers(); - setMaxLocals(1); - while (mods != null) { - Keyword k = (Keyword)mods.head(); - mods = mods.tail(); - if (k.get() == STATIC) { - setMaxLocals(0); - inStaticMethod = true; - } - } - - ASTList params = method.getParams(); - while (params != null) { - atDeclarator((Declarator)params.head()); - params = params.tail(); - } - - Stmnt s = method.getBody(); - atMethodBody(s, method.isConstructor(), - method.getReturn().getType() == VOID); - } - - /** - * @param isCons true if super() must be called. - * false if the method is a class initializer. - */ - public void atMethodBody(Stmnt s, boolean isCons, boolean isVoid) - throws CompileError - { - if (s == null) - return; - - if (isCons && needsSuperCall(s)) - insertDefaultSuperCall(); - - hasReturned = false; - s.accept(this); - if (!hasReturned) - if (isVoid) { - bytecode.addOpcode(Opcode.RETURN); - hasReturned = true; - } - else - throw new CompileError("no return statement"); - } - - private boolean needsSuperCall(Stmnt body) throws CompileError { - if (body.getOperator() == BLOCK) - body = (Stmnt)body.head(); - - if (body != null && body.getOperator() == EXPR) { - ASTree expr = body.head(); - if (expr != null && expr instanceof Expr - && ((Expr)expr).getOperator() == CALL) { - ASTree target = ((Expr)expr).head(); - if (target instanceof Keyword) { - int token = ((Keyword)target).get(); - return token != THIS && token != SUPER; - } - } - } - - return true; - } - - protected abstract void insertDefaultSuperCall() throws CompileError; - - public void atStmnt(Stmnt st) throws CompileError { - if (st == null) - return; // empty - - int op = st.getOperator(); - if (op == EXPR) { - ASTree expr = st.getLeft(); - doTypeCheck(expr); - if (expr instanceof AssignExpr) - atAssignExpr((AssignExpr)expr, false); - else if (isPlusPlusExpr(expr)) { - Expr e = (Expr)expr; - atPlusPlus(e.getOperator(), e.oprand1(), e, false); - } - else { - expr.accept(this); - if (is2word(exprType, arrayDim)) - bytecode.addOpcode(POP2); - else if (exprType != VOID) - bytecode.addOpcode(POP); - } - } - else if (op == DECL || op == BLOCK) { - ASTList list = st; - while (list != null) { - ASTree h = list.head(); - list = list.tail(); - if (h != null) - h.accept(this); - } - } - else if (op == IF) - atIfStmnt(st); - else if (op == WHILE || op == DO) - atWhileStmnt(st, op == WHILE); - else if (op == FOR) - atForStmnt(st); - else if (op == BREAK || op == CONTINUE) - atBreakStmnt(st, op == BREAK); - else if (op == TokenId.RETURN) - atReturnStmnt(st); - else if (op == THROW) - atThrowStmnt(st); - else if (op == TRY) - atTryStmnt(st); - else if (op == SWITCH) - atSwitchStmnt(st); - else if (op == SYNCHRONIZED) - atSyncStmnt(st); - else { - // LABEL, SWITCH label stament might be null?. - hasReturned = false; - throw new CompileError( - "sorry, not supported statement: TokenId " + op); - } - } - - private void atIfStmnt(Stmnt st) throws CompileError { - ASTree expr = st.head(); - Stmnt thenp = (Stmnt)st.tail().head(); - Stmnt elsep = (Stmnt)st.tail().tail().head(); - if (compileBooleanExpr(false, expr)) { - hasReturned = false; - if (elsep != null) - elsep.accept(this); - - return; - } - - int pc = bytecode.currentPc(); - int pc2 = 0; - bytecode.addIndex(0); // correct later - - hasReturned = false; - if (thenp != null) - thenp.accept(this); - - boolean thenHasReturned = hasReturned; - hasReturned = false; - - if (elsep != null && !thenHasReturned) { - bytecode.addOpcode(Opcode.GOTO); - pc2 = bytecode.currentPc(); - bytecode.addIndex(0); - } - - bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); - if (elsep != null) { - elsep.accept(this); - if (!thenHasReturned) - bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1); - - hasReturned = thenHasReturned && hasReturned; - } - } - - private void atWhileStmnt(Stmnt st, boolean notDo) throws CompileError { - ArrayList prevBreakList = breakList; - ArrayList prevContList = continueList; - breakList = new ArrayList(); - continueList = new ArrayList(); - - ASTree expr = st.head(); - Stmnt body = (Stmnt)st.tail(); - - int pc = 0; - if (notDo) { - bytecode.addOpcode(Opcode.GOTO); - pc = bytecode.currentPc(); - bytecode.addIndex(0); - } - - int pc2 = bytecode.currentPc(); - if (body != null) - body.accept(this); - - int pc3 = bytecode.currentPc(); - if (notDo) - bytecode.write16bit(pc, pc3 - pc + 1); - - boolean alwaysBranch = compileBooleanExpr(true, expr); - if (alwaysBranch) { - bytecode.addOpcode(Opcode.GOTO); - alwaysBranch = breakList.size() == 0; - } - - bytecode.addIndex(pc2 - bytecode.currentPc() + 1); - patchGoto(breakList, bytecode.currentPc()); - patchGoto(continueList, pc3); - continueList = prevContList; - breakList = prevBreakList; - hasReturned = alwaysBranch; - } - - protected void patchGoto(ArrayList list, int targetPc) { - int n = list.size(); - for (int i = 0; i < n; ++i) { - int pc = ((Integer)list.get(i)).intValue(); - bytecode.write16bit(pc, targetPc - pc + 1); - } - } - - private void atForStmnt(Stmnt st) throws CompileError { - ArrayList prevBreakList = breakList; - ArrayList prevContList = continueList; - breakList = new ArrayList(); - continueList = new ArrayList(); - - Stmnt init = (Stmnt)st.head(); - ASTList p = st.tail(); - ASTree expr = p.head(); - p = p.tail(); - Stmnt update = (Stmnt)p.head(); - Stmnt body = (Stmnt)p.tail(); - - if (init != null) - init.accept(this); - - int pc = bytecode.currentPc(); - int pc2 = 0; - if (expr != null) { - if (compileBooleanExpr(false, expr)) { - // in case of "for (...; false; ...)" - continueList = prevContList; - breakList = prevBreakList; - hasReturned = false; - return; - } - - pc2 = bytecode.currentPc(); - bytecode.addIndex(0); - } - - if (body != null) - body.accept(this); - - int pc3 = bytecode.currentPc(); - if (update != null) - update.accept(this); - - bytecode.addOpcode(Opcode.GOTO); - bytecode.addIndex(pc - bytecode.currentPc() + 1); - - int pc4 = bytecode.currentPc(); - if (expr != null) - bytecode.write16bit(pc2, pc4 - pc2 + 1); - - patchGoto(breakList, pc4); - patchGoto(continueList, pc3); - continueList = prevContList; - breakList = prevBreakList; - hasReturned = false; - } - - private void atSwitchStmnt(Stmnt st) throws CompileError { - compileExpr(st.head()); - - ArrayList prevBreakList = breakList; - breakList = new ArrayList(); - int opcodePc = bytecode.currentPc(); - bytecode.addOpcode(LOOKUPSWITCH); - int npads = 3 - (opcodePc & 3); - while (npads-- > 0) - bytecode.add(0); - - Stmnt body = (Stmnt)st.tail(); - int npairs = 0; - for (ASTList list = body; list != null; list = list.tail()) - if (((Stmnt)list.head()).getOperator() == CASE) - ++npairs; - - // opcodePc2 is the position at which the default jump offset is. - int opcodePc2 = bytecode.currentPc(); - bytecode.addGap(4); - bytecode.add32bit(npairs); - bytecode.addGap(npairs * 8); - - long[] pairs = new long[npairs]; - int ipairs = 0; - int defaultPc = -1; - for (ASTList list = body; list != null; list = list.tail()) { - Stmnt label = (Stmnt)list.head(); - int op = label.getOperator(); - if (op == DEFAULT) - defaultPc = bytecode.currentPc(); - else if (op != CASE) - fatal(); - else { - pairs[ipairs++] - = ((long)computeLabel(label.head()) << 32) + - ((long)(bytecode.currentPc() - opcodePc) & 0xffffffff); - } - - hasReturned = false; - ((Stmnt)label.tail()).accept(this); - } - - Arrays.sort(pairs); - int pc = opcodePc2 + 8; - for (int i = 0; i < npairs; ++i) { - bytecode.write32bit(pc, (int)(pairs[i] >>> 32)); - bytecode.write32bit(pc + 4, (int)pairs[i]); - pc += 8; - } - - if (defaultPc < 0 || breakList.size() > 0) - hasReturned = false; - - int endPc = bytecode.currentPc(); - if (defaultPc < 0) - defaultPc = endPc; - - bytecode.write32bit(opcodePc2, defaultPc - opcodePc); - - patchGoto(breakList, endPc); - breakList = prevBreakList; - } - - private int computeLabel(ASTree expr) throws CompileError { - doTypeCheck(expr); - expr = TypeChecker.stripPlusExpr(expr); - if (expr instanceof IntConst) - return (int)((IntConst)expr).get(); - else - throw new CompileError("bad case label"); - } - - private void atBreakStmnt(Stmnt st, boolean notCont) - throws CompileError - { - if (st.head() != null) - throw new CompileError( - "sorry, not support labeled break or continue"); - - bytecode.addOpcode(Opcode.GOTO); - Integer pc = new Integer(bytecode.currentPc()); - bytecode.addIndex(0); - if (notCont) - breakList.add(pc); - else - continueList.add(pc); - } - - protected void atReturnStmnt(Stmnt st) throws CompileError { - atReturnStmnt2(st.getLeft()); - } - - protected final void atReturnStmnt2(ASTree result) throws CompileError { - int op; - if (result == null) - op = Opcode.RETURN; - else { - compileExpr(result); - if (arrayDim > 0) - op = ARETURN; - else { - int type = exprType; - if (type == DOUBLE) - op = DRETURN; - else if (type == FLOAT) - op = FRETURN; - else if (type == LONG) - op = LRETURN; - else if (isRefType(type)) - op = ARETURN; - else - op = IRETURN; - } - } - - for (ReturnHook har = returnHooks; har != null; har = har.next) - if (har.doit(bytecode, op)) { - hasReturned = true; - return; - } - - bytecode.addOpcode(op); - hasReturned = true; - } - - private void atThrowStmnt(Stmnt st) throws CompileError { - ASTree e = st.getLeft(); - compileExpr(e); - if (exprType != CLASS || arrayDim > 0) - throw new CompileError("bad throw statement"); - - bytecode.addOpcode(ATHROW); - hasReturned = true; - } - - /* overridden in MemberCodeGen - */ - protected void atTryStmnt(Stmnt st) throws CompileError { - hasReturned = false; - } - - private void atSyncStmnt(Stmnt st) throws CompileError { - int nbreaks = getListSize(breakList); - int ncontinues = getListSize(continueList); - - compileExpr(st.head()); - if (exprType != CLASS && arrayDim == 0) - throw new CompileError("bad type expr for synchronized block"); - - Bytecode bc = bytecode; - final int var = bc.getMaxLocals(); - bc.incMaxLocals(1); - bc.addOpcode(DUP); - bc.addAstore(var); - bc.addOpcode(MONITORENTER); - - ReturnHook rh = new ReturnHook(this) { - protected boolean doit(Bytecode b, int opcode) { - b.addAload(var); - b.addOpcode(MONITOREXIT); - return false; - } - }; - - int pc = bc.currentPc(); - Stmnt body = (Stmnt)st.tail(); - if (body != null) - body.accept(this); - - int pc2 = bc.currentPc(); - int pc3 = 0; - if (!hasReturned) { - rh.doit(bc, 0); // the 2nd arg is ignored. - bc.addOpcode(Opcode.GOTO); - pc3 = bc.currentPc(); - bc.addIndex(0); - } - - if (pc < pc2) { // if the body is not empty - int pc4 = bc.currentPc(); - rh.doit(bc, 0); // the 2nd arg is ignored. - bc.addOpcode(ATHROW); - bc.addExceptionHandler(pc, pc2, pc4, 0); - } - - if (!hasReturned) - bc.write16bit(pc3, bc.currentPc() - pc3 + 1); - - rh.remove(this); - - if (getListSize(breakList) != nbreaks - || getListSize(continueList) != ncontinues) - throw new CompileError( - "sorry, cannot break/continue in synchronized block"); - } - - private static int getListSize(ArrayList list) { - return list == null ? 0 : list.size(); - } - - private static boolean isPlusPlusExpr(ASTree expr) { - if (expr instanceof Expr) { - int op = ((Expr)expr).getOperator(); - return op == PLUSPLUS || op == MINUSMINUS; - } - - return false; - } - - public void atDeclarator(Declarator d) throws CompileError { - d.setLocalVar(getMaxLocals()); - d.setClassName(resolveClassName(d.getClassName())); - - int size; - if (is2word(d.getType(), d.getArrayDim())) - size = 2; - else - size = 1; - - incMaxLocals(size); - - /* NOTE: Array initializers has not been supported. - */ - ASTree init = d.getInitializer(); - if (init != null) { - doTypeCheck(init); - atVariableAssign(null, '=', null, d, init, false); - } - } - - public abstract void atNewExpr(NewExpr n) throws CompileError; - - public abstract void atArrayInit(ArrayInit init) throws CompileError; - - public void atAssignExpr(AssignExpr expr) throws CompileError { - atAssignExpr(expr, true); - } - - protected void atAssignExpr(AssignExpr expr, boolean doDup) - throws CompileError - { - // =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, >>>= - int op = expr.getOperator(); - ASTree left = expr.oprand1(); - ASTree right = expr.oprand2(); - if (left instanceof Variable) - atVariableAssign(expr, op, (Variable)left, - ((Variable)left).getDeclarator(), - right, doDup); - else { - if (left instanceof Expr) { - Expr e = (Expr)left; - if (e.getOperator() == ARRAY) { - atArrayAssign(expr, op, (Expr)left, right, doDup); - return; - } - } - - atFieldAssign(expr, op, left, right, doDup); - } - } - - protected static void badAssign(Expr expr) throws CompileError { - String msg; - if (expr == null) - msg = "incompatible type for assignment"; - else - msg = "incompatible type for " + expr.getName(); - - throw new CompileError(msg); - } - - /* op is either =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, or >>>=. - * - * expr and var can be null. - */ - private void atVariableAssign(Expr expr, int op, Variable var, - Declarator d, ASTree right, - boolean doDup) throws CompileError - { - int varType = d.getType(); - int varArray = d.getArrayDim(); - String varClass = d.getClassName(); - int varNo = getLocalVar(d); - - if (op != '=') - atVariable(var); - - // expr is null if the caller is atDeclarator(). - if (expr == null && right instanceof ArrayInit) - atArrayVariableAssign((ArrayInit)right, varType, varArray, varClass); - else - atAssignCore(expr, op, right, varType, varArray, varClass); - - if (doDup) - if (is2word(varType, varArray)) - bytecode.addOpcode(DUP2); - else - bytecode.addOpcode(DUP); - - if (varArray > 0) - bytecode.addAstore(varNo); - else if (varType == DOUBLE) - bytecode.addDstore(varNo); - else if (varType == FLOAT) - bytecode.addFstore(varNo); - else if (varType == LONG) - bytecode.addLstore(varNo); - else if (isRefType(varType)) - bytecode.addAstore(varNo); - else - bytecode.addIstore(varNo); - - exprType = varType; - arrayDim = varArray; - className = varClass; - } - - protected abstract void atArrayVariableAssign(ArrayInit init, - int varType, int varArray, String varClass) throws CompileError; - - private void atArrayAssign(Expr expr, int op, Expr array, - ASTree right, boolean doDup) throws CompileError - { - arrayAccess(array.oprand1(), array.oprand2()); - - if (op != '=') { - bytecode.addOpcode(DUP2); - bytecode.addOpcode(getArrayReadOp(exprType, arrayDim)); - } - - int aType = exprType; - int aDim = arrayDim; - String cname = className; - - atAssignCore(expr, op, right, aType, aDim, cname); - - if (doDup) - if (is2word(aType, aDim)) - bytecode.addOpcode(DUP2_X2); - else - bytecode.addOpcode(DUP_X2); - - bytecode.addOpcode(getArrayWriteOp(aType, aDim)); - exprType = aType; - arrayDim = aDim; - className = cname; - } - - protected abstract void atFieldAssign(Expr expr, int op, ASTree left, - ASTree right, boolean doDup) throws CompileError; - - protected void atAssignCore(Expr expr, int op, ASTree right, - int type, int dim, String cname) - throws CompileError - { - if (op == PLUS_E && dim == 0 && type == CLASS) - atStringPlusEq(expr, type, dim, cname, right); - else { - right.accept(this); - if (invalidDim(exprType, arrayDim, className, type, dim, cname, - false) || (op != '=' && dim > 0)) - badAssign(expr); - - if (op != '=') { - int token = assignOps[op - MOD_E]; - int k = lookupBinOp(token); - if (k < 0) - fatal(); - - atArithBinExpr(expr, token, k, type); - } - } - - if (op != '=' || (dim == 0 && !isRefType(type))) - atNumCastExpr(exprType, type); - - // type check should be done here. - } - - private void atStringPlusEq(Expr expr, int type, int dim, String cname, - ASTree right) - throws CompileError - { - if (!jvmJavaLangString.equals(cname)) - badAssign(expr); - - convToString(type, dim); // the value might be null. - right.accept(this); - convToString(exprType, arrayDim); - bytecode.addInvokevirtual(javaLangString, "concat", - "(Ljava/lang/String;)Ljava/lang/String;"); - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangString; - } - - private boolean invalidDim(int srcType, int srcDim, String srcClass, - int destType, int destDim, String destClass, - boolean isCast) - { - if (srcDim != destDim) - if (srcType == NULL) - return false; - else if (destDim == 0 && destType == CLASS - && jvmJavaLangObject.equals(destClass)) - return false; - else if (isCast && srcDim == 0 && srcType == CLASS - && jvmJavaLangObject.equals(srcClass)) - return false; - else - return true; - - return false; - } - - public void atCondExpr(CondExpr expr) throws CompileError { - if (booleanExpr(false, expr.condExpr())) - expr.elseExpr().accept(this); - else { - int pc = bytecode.currentPc(); - bytecode.addIndex(0); // correct later - expr.thenExpr().accept(this); - int dim1 = arrayDim; - bytecode.addOpcode(Opcode.GOTO); - int pc2 = bytecode.currentPc(); - bytecode.addIndex(0); - bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); - expr.elseExpr().accept(this); - if (dim1 != arrayDim) - throw new CompileError("type mismatch in ?:"); - - bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1); - } - } - - static final int[] binOp = { - '+', DADD, FADD, LADD, IADD, - '-', DSUB, FSUB, LSUB, ISUB, - '*', DMUL, FMUL, LMUL, IMUL, - '/', DDIV, FDIV, LDIV, IDIV, - '%', DREM, FREM, LREM, IREM, - '|', NOP, NOP, LOR, IOR, - '^', NOP, NOP, LXOR, IXOR, - '&', NOP, NOP, LAND, IAND, - LSHIFT, NOP, NOP, LSHL, ISHL, - RSHIFT, NOP, NOP, LSHR, ISHR, - ARSHIFT, NOP, NOP, LUSHR, IUSHR }; - - static int lookupBinOp(int token) { - int[] code = binOp; - int s = code.length; - for (int k = 0; k < s; k = k + 5) - if (code[k] == token) - return k; - - return -1; - } - - public void atBinExpr(BinExpr expr) throws CompileError { - int token = expr.getOperator(); - - /* arithmetic operators: +, -, *, /, %, |, ^, &, <<, >>, >>> - */ - int k = lookupBinOp(token); - if (k >= 0) { - expr.oprand1().accept(this); - ASTree right = expr.oprand2(); - if (right == null) - return; // see TypeChecker.atBinExpr(). - - int type1 = exprType; - int dim1 = arrayDim; - String cname1 = className; - right.accept(this); - if (dim1 != arrayDim) - throw new CompileError("incompatible array types"); - - if (token == '+' && dim1 == 0 - && (type1 == CLASS || exprType == CLASS)) - atStringConcatExpr(expr, type1, dim1, cname1); - else - atArithBinExpr(expr, token, k, type1); - } - else { - /* equation: &&, ||, ==, !=, <=, >=, <, > - */ - if (!booleanExpr(true, expr)) { - bytecode.addIndex(7); - bytecode.addIconst(0); // false - bytecode.addOpcode(Opcode.GOTO); - bytecode.addIndex(4); - } - - bytecode.addIconst(1); // true - } - } - - /* arrayDim values of the two oprands must be equal. - * If an oprand type is not a numeric type, this method - * throws an exception. - */ - private void atArithBinExpr(Expr expr, int token, - int index, int type1) throws CompileError - { - if (arrayDim != 0) - badTypes(expr); - - int type2 = exprType; - if (token == LSHIFT || token == RSHIFT || token == ARSHIFT) - if (type2 == INT || type2 == SHORT - || type2 == CHAR || type2 == BYTE) - exprType = type1; - else - badTypes(expr); - else - convertOprandTypes(type1, type2, expr); - - int p = typePrecedence(exprType); - if (p >= 0) { - int op = binOp[index + p + 1]; - if (op != NOP) { - if (p == P_INT && exprType != BOOLEAN) - exprType = INT; // type1 may be BYTE, ... - - bytecode.addOpcode(op); - return; - } - } - - badTypes(expr); - } - - private void atStringConcatExpr(Expr expr, int type1, int dim1, - String cname1) throws CompileError - { - int type2 = exprType; - int dim2 = arrayDim; - boolean type2Is2 = is2word(type2, dim2); - boolean type2IsString - = (type2 == CLASS && jvmJavaLangString.equals(className)); - - if (type2Is2) - convToString(type2, dim2); - - if (is2word(type1, dim1)) { - bytecode.addOpcode(DUP_X2); - bytecode.addOpcode(POP); - } - else - bytecode.addOpcode(SWAP); - - // even if type1 is String, the left operand might be null. - convToString(type1, dim1); - bytecode.addOpcode(SWAP); - - if (!type2Is2 && !type2IsString) - convToString(type2, dim2); - - bytecode.addInvokevirtual(javaLangString, "concat", - "(Ljava/lang/String;)Ljava/lang/String;"); - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangString; - } - - private void convToString(int type, int dim) throws CompileError { - final String method = "valueOf"; - - if (isRefType(type) || dim > 0) - bytecode.addInvokestatic(javaLangString, method, - "(Ljava/lang/Object;)Ljava/lang/String;"); - else if (type == DOUBLE) - bytecode.addInvokestatic(javaLangString, method, - "(D)Ljava/lang/String;"); - else if (type == FLOAT) - bytecode.addInvokestatic(javaLangString, method, - "(F)Ljava/lang/String;"); - else if (type == LONG) - bytecode.addInvokestatic(javaLangString, method, - "(J)Ljava/lang/String;"); - else if (type == BOOLEAN) - bytecode.addInvokestatic(javaLangString, method, - "(Z)Ljava/lang/String;"); - else if (type == CHAR) - bytecode.addInvokestatic(javaLangString, method, - "(C)Ljava/lang/String;"); - else if (type == VOID) - throw new CompileError("void type expression"); - else /* INT, BYTE, SHORT */ - bytecode.addInvokestatic(javaLangString, method, - "(I)Ljava/lang/String;"); - } - - /* Produces the opcode to branch if the condition is true. - * The oprand (branch offset) is not produced. - * - * @return true if the compiled code is GOTO (always branch). - * GOTO is not produced. - */ - private boolean booleanExpr(boolean branchIf, ASTree expr) - throws CompileError - { - boolean isAndAnd; - int op = getCompOperator(expr); - if (op == EQ) { // ==, !=, ... - BinExpr bexpr = (BinExpr)expr; - int type1 = compileOprands(bexpr); - // here, arrayDim might represent the array dim. of the left oprand - // if the right oprand is NULL. - compareExpr(branchIf, bexpr.getOperator(), type1, bexpr); - } - else if (op == '!') - return booleanExpr(!branchIf, ((Expr)expr).oprand1()); - else if ((isAndAnd = (op == ANDAND)) || op == OROR) { - BinExpr bexpr = (BinExpr)expr; - if (booleanExpr(!isAndAnd, bexpr.oprand1())) { - exprType = BOOLEAN; - arrayDim = 0; - return true; - } - else { - int pc = bytecode.currentPc(); - bytecode.addIndex(0); // correct later - if (booleanExpr(isAndAnd, bexpr.oprand2())) - bytecode.addOpcode(Opcode.GOTO); - - bytecode.write16bit(pc, bytecode.currentPc() - pc + 3); - if (branchIf != isAndAnd) { - bytecode.addIndex(6); // skip GOTO instruction - bytecode.addOpcode(Opcode.GOTO); - } - } - } - else if (isAlwaysBranch(expr, branchIf)) { - // Opcode.GOTO is not added here. The caller must add it. - exprType = BOOLEAN; - arrayDim = 0; - return true; // always branch - } - else { // others - expr.accept(this); - if (exprType != BOOLEAN || arrayDim != 0) - throw new CompileError("boolean expr is required"); - - bytecode.addOpcode(branchIf ? IFNE : IFEQ); - } - - exprType = BOOLEAN; - arrayDim = 0; - return false; - } - - private static boolean isAlwaysBranch(ASTree expr, boolean branchIf) { - if (expr instanceof Keyword) { - int t = ((Keyword)expr).get(); - return branchIf ? t == TRUE : t == FALSE; - } - - return false; - } - - static int getCompOperator(ASTree expr) throws CompileError { - if (expr instanceof Expr) { - Expr bexpr = (Expr)expr; - int token = bexpr.getOperator(); - if (token == '!') - return '!'; - else if ((bexpr instanceof BinExpr) - && token != OROR && token != ANDAND - && token != '&' && token != '|') - return EQ; // ==, !=, ... - else - return token; - } - - return ' '; // others - } - - private int compileOprands(BinExpr expr) throws CompileError { - expr.oprand1().accept(this); - int type1 = exprType; - int dim1 = arrayDim; - expr.oprand2().accept(this); - if (dim1 != arrayDim) - if (type1 != NULL && exprType != NULL) - throw new CompileError("incompatible array types"); - else if (exprType == NULL) - arrayDim = dim1; - - if (type1 == NULL) - return exprType; - else - return type1; - } - - private static final int ifOp[] = { EQ, IF_ICMPEQ, IF_ICMPNE, - NEQ, IF_ICMPNE, IF_ICMPEQ, - LE, IF_ICMPLE, IF_ICMPGT, - GE, IF_ICMPGE, IF_ICMPLT, - '<', IF_ICMPLT, IF_ICMPGE, - '>', IF_ICMPGT, IF_ICMPLE }; - - private static final int ifOp2[] = { EQ, IFEQ, IFNE, - NEQ, IFNE, IFEQ, - LE, IFLE, IFGT, - GE, IFGE, IFLT, - '<', IFLT, IFGE, - '>', IFGT, IFLE }; - - /* Produces the opcode to branch if the condition is true. - * The oprands are not produced. - * - * Parameter expr - compare expression ==, !=, <=, >=, <, > - */ - private void compareExpr(boolean branchIf, - int token, int type1, BinExpr expr) - throws CompileError - { - if (arrayDim == 0) - convertOprandTypes(type1, exprType, expr); - - int p = typePrecedence(exprType); - if (p == P_OTHER || arrayDim > 0) - if (token == EQ) - bytecode.addOpcode(branchIf ? IF_ACMPEQ : IF_ACMPNE); - else if (token == NEQ) - bytecode.addOpcode(branchIf ? IF_ACMPNE : IF_ACMPEQ); - else - badTypes(expr); - else - if (p == P_INT) { - int op[] = ifOp; - for (int i = 0; i < op.length; i += 3) - if (op[i] == token) { - bytecode.addOpcode(op[i + (branchIf ? 1 : 2)]); - return; - } - - badTypes(expr); - } - else { - if (p == P_DOUBLE) - if (token == '<' || token == LE) - bytecode.addOpcode(DCMPG); - else - bytecode.addOpcode(DCMPL); - else if (p == P_FLOAT) - if (token == '<' || token == LE) - bytecode.addOpcode(FCMPG); - else - bytecode.addOpcode(FCMPL); - else if (p == P_LONG) - bytecode.addOpcode(LCMP); // 1: >, 0: =, -1: < - else - fatal(); - - int[] op = ifOp2; - for (int i = 0; i < op.length; i += 3) - if (op[i] == token) { - bytecode.addOpcode(op[i + (branchIf ? 1 : 2)]); - return; - } - - badTypes(expr); - } - } - - protected static void badTypes(Expr expr) throws CompileError { - throw new CompileError("invalid types for " + expr.getName()); - } - - private static final int P_DOUBLE = 0; - private static final int P_FLOAT = 1; - private static final int P_LONG = 2; - private static final int P_INT = 3; - private static final int P_OTHER = -1; - - protected static boolean isRefType(int type) { - return type == CLASS || type == NULL; - } - - private static int typePrecedence(int type) { - if (type == DOUBLE) - return P_DOUBLE; - else if (type == FLOAT) - return P_FLOAT; - else if (type == LONG) - return P_LONG; - else if (isRefType(type)) - return P_OTHER; - else if (type == VOID) - return P_OTHER; // this is wrong, but ... - else - return P_INT; // BOOLEAN, BYTE, CHAR, SHORT, INT - } - - // used in TypeChecker. - static boolean isP_INT(int type) { - return typePrecedence(type) == P_INT; - } - - // used in TypeChecker. - static boolean rightIsStrong(int type1, int type2) { - int type1_p = typePrecedence(type1); - int type2_p = typePrecedence(type2); - return type1_p >= 0 && type2_p >= 0 && type1_p > type2_p; - } - - private static final int[] castOp = { - /* D F L I */ - /* double */ NOP, D2F, D2L, D2I, - /* float */ F2D, NOP, F2L, F2I, - /* long */ L2D, L2F, NOP, L2I, - /* other */ I2D, I2F, I2L, NOP }; - - /* do implicit type conversion. - * arrayDim values of the two oprands must be zero. - */ - private void convertOprandTypes(int type1, int type2, Expr expr) - throws CompileError - { - boolean rightStrong; - int type1_p = typePrecedence(type1); - int type2_p = typePrecedence(type2); - - if (type2_p < 0 && type1_p < 0) // not primitive types - return; - - if (type2_p < 0 || type1_p < 0) // either is not a primitive type - badTypes(expr); - - int op, result_type; - if (type1_p <= type2_p) { - rightStrong = false; - exprType = type1; - op = castOp[type2_p * 4 + type1_p]; - result_type = type1_p; - } - else { - rightStrong = true; - op = castOp[type1_p * 4 + type2_p]; - result_type = type2_p; - } - - if (rightStrong) { - if (result_type == P_DOUBLE || result_type == P_LONG) { - if (type1_p == P_DOUBLE || type1_p == P_LONG) - bytecode.addOpcode(DUP2_X2); - else - bytecode.addOpcode(DUP2_X1); - - bytecode.addOpcode(POP2); - bytecode.addOpcode(op); - bytecode.addOpcode(DUP2_X2); - bytecode.addOpcode(POP2); - } - else if (result_type == P_FLOAT) { - if (type1_p == P_LONG) { - bytecode.addOpcode(DUP_X2); - bytecode.addOpcode(POP); - } - else - bytecode.addOpcode(SWAP); - - bytecode.addOpcode(op); - bytecode.addOpcode(SWAP); - } - else - fatal(); - } - else if (op != NOP) - bytecode.addOpcode(op); - } - - public void atCastExpr(CastExpr expr) throws CompileError { - String cname = resolveClassName(expr.getClassName()); - String toClass = checkCastExpr(expr, cname); - int srcType = exprType; - exprType = expr.getType(); - arrayDim = expr.getArrayDim(); - className = cname; - if (toClass == null) - atNumCastExpr(srcType, exprType); // built-in type - else - bytecode.addCheckcast(toClass); - } - - public void atInstanceOfExpr(InstanceOfExpr expr) throws CompileError { - String cname = resolveClassName(expr.getClassName()); - String toClass = checkCastExpr(expr, cname); - bytecode.addInstanceof(toClass); - exprType = BOOLEAN; - arrayDim = 0; - } - - private String checkCastExpr(CastExpr expr, String name) - throws CompileError - { - final String msg = "invalid cast"; - ASTree oprand = expr.getOprand(); - int dim = expr.getArrayDim(); - int type = expr.getType(); - oprand.accept(this); - int srcType = exprType; - if (invalidDim(srcType, arrayDim, className, type, dim, name, true) - || srcType == VOID || type == VOID) - throw new CompileError(msg); - - if (type == CLASS) { - if (!isRefType(srcType)) - throw new CompileError(msg); - - return toJvmArrayName(name, dim); - } - else - if (dim > 0) - return toJvmTypeName(type, dim); - else - return null; // built-in type - } - - void atNumCastExpr(int srcType, int destType) - throws CompileError - { - if (srcType == destType) - return; - - int op, op2; - int stype = typePrecedence(srcType); - int dtype = typePrecedence(destType); - if (0 <= stype && stype < 3) - op = castOp[stype * 4 + dtype]; - else - op = NOP; - - if (destType == DOUBLE) - op2 = I2D; - else if (destType == FLOAT) - op2 = I2F; - else if (destType == LONG) - op2 = I2L; - else if (destType == SHORT) - op2 = I2S; - else if (destType == CHAR) - op2 = I2C; - else if (destType == BYTE) - op2 = I2B; - else - op2 = NOP; - - if (op != NOP) - bytecode.addOpcode(op); - - if (op == NOP || op == L2I || op == F2I || op == D2I) - if (op2 != NOP) - bytecode.addOpcode(op2); - } - - public void atExpr(Expr expr) throws CompileError { - // array access, member access, - // (unary) +, (unary) -, ++, --, !, ~ - - int token = expr.getOperator(); - ASTree oprand = expr.oprand1(); - if (token == '.') { - String member = ((Symbol)expr.oprand2()).get(); - if (member.equals("class")) - atClassObject(expr); // .class - else - atFieldRead(expr); - } - else if (token == MEMBER) { // field read - /* MEMBER ('#') is an extension by Javassist. - * The compiler internally uses # for compiling .class - * expressions such as "int.class". - */ - atFieldRead(expr); - } - else if (token == ARRAY) - atArrayRead(oprand, expr.oprand2()); - else if (token == PLUSPLUS || token == MINUSMINUS) - atPlusPlus(token, oprand, expr, true); - else if (token == '!') { - if (!booleanExpr(false, expr)) { - bytecode.addIndex(7); - bytecode.addIconst(1); - bytecode.addOpcode(Opcode.GOTO); - bytecode.addIndex(4); - } - - bytecode.addIconst(0); - } - else if (token == CALL) // method call - fatal(); - else { - expr.oprand1().accept(this); - int type = typePrecedence(exprType); - if (arrayDim > 0) - badType(expr); - - if (token == '-') { - if (type == P_DOUBLE) - bytecode.addOpcode(DNEG); - else if (type == P_FLOAT) - bytecode.addOpcode(FNEG); - else if (type == P_LONG) - bytecode.addOpcode(LNEG); - else if (type == P_INT) { - bytecode.addOpcode(INEG); - exprType = INT; // type may be BYTE, ... - } - else - badType(expr); - } - else if (token == '~') { - if (type == P_INT) { - bytecode.addIconst(-1); - bytecode.addOpcode(IXOR); - exprType = INT; // type may be BYTE. ... - } - else if (type == P_LONG) { - bytecode.addLconst(-1); - bytecode.addOpcode(LXOR); - } - else - badType(expr); - - } - else if (token == '+') { - if (type == P_OTHER) - badType(expr); - - // do nothing. ignore. - } - else - fatal(); - } - } - - protected static void badType(Expr expr) throws CompileError { - throw new CompileError("invalid type for " + expr.getName()); - } - - public abstract void atCallExpr(CallExpr expr) throws CompileError; - - protected abstract void atFieldRead(ASTree expr) throws CompileError; - - public void atClassObject(Expr expr) throws CompileError { - ASTree op1 = expr.oprand1(); - if (!(op1 instanceof Symbol)) - throw new CompileError("fatal error: badly parsed .class expr"); - - String cname = ((Symbol)op1).get(); - if (cname.startsWith("[")) { - int i = cname.indexOf("[L"); - if (i >= 0) { - String name = cname.substring(i + 2, cname.length() - 1); - String name2 = resolveClassName(name); - if (!name.equals(name2)) { - /* For example, to obtain String[].class, - * "[Ljava.lang.String;" (not "[Ljava/lang/String"!) - * must be passed to Class.forName(). - */ - name2 = MemberResolver.jvmToJavaName(name2); - StringBuffer sbuf = new StringBuffer(); - while (i-- >= 0) - sbuf.append('['); - - sbuf.append('L').append(name2).append(';'); - cname = sbuf.toString(); - } - } - } - else { - cname = resolveClassName(MemberResolver.javaToJvmName(cname)); - cname = MemberResolver.jvmToJavaName(cname); - } - - atClassObject2(cname); - exprType = CLASS; - arrayDim = 0; - className = "java/lang/Class"; - } - - /* MemberCodeGen overrides this method. - */ - protected void atClassObject2(String cname) throws CompileError { - int start = bytecode.currentPc(); - bytecode.addLdc(cname); - bytecode.addInvokestatic("java.lang.Class", "forName", - "(Ljava/lang/String;)Ljava/lang/Class;"); - int end = bytecode.currentPc(); - bytecode.addOpcode(Opcode.GOTO); - int pc = bytecode.currentPc(); - bytecode.addIndex(0); // correct later - - bytecode.addExceptionHandler(start, end, bytecode.currentPc(), - "java.lang.ClassNotFoundException"); - - /* -- the following code is for inlining a call to DotClass.fail(). - - int var = getMaxLocals(); - incMaxLocals(1); - bytecode.growStack(1); - bytecode.addAstore(var); - - bytecode.addNew("java.lang.NoClassDefFoundError"); - bytecode.addOpcode(DUP); - bytecode.addAload(var); - bytecode.addInvokevirtual("java.lang.ClassNotFoundException", - "getMessage", "()Ljava/lang/String;"); - bytecode.addInvokespecial("java.lang.NoClassDefFoundError", "", - "(Ljava/lang/String;)V"); - */ - - bytecode.growStack(1); - bytecode.addInvokestatic("javassist.runtime.DotClass", "fail", - "(Ljava/lang/ClassNotFoundException;)" - + "Ljava/lang/NoClassDefFoundError;"); - bytecode.addOpcode(ATHROW); - bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); - } - - public void atArrayRead(ASTree array, ASTree index) - throws CompileError - { - arrayAccess(array, index); - bytecode.addOpcode(getArrayReadOp(exprType, arrayDim)); - } - - protected void arrayAccess(ASTree array, ASTree index) - throws CompileError - { - array.accept(this); - int type = exprType; - int dim = arrayDim; - if (dim == 0) - throw new CompileError("bad array access"); - - String cname = className; - - index.accept(this); - if (typePrecedence(exprType) != P_INT || arrayDim > 0) - throw new CompileError("bad array index"); - - exprType = type; - arrayDim = dim - 1; - className = cname; - } - - protected static int getArrayReadOp(int type, int dim) { - if (dim > 0) - return AALOAD; - - switch (type) { - case DOUBLE : - return DALOAD; - case FLOAT : - return FALOAD; - case LONG : - return LALOAD; - case INT : - return IALOAD; - case SHORT : - return SALOAD; - case CHAR : - return CALOAD; - case BYTE : - case BOOLEAN : - return BALOAD; - default : - return AALOAD; - } - } - - protected static int getArrayWriteOp(int type, int dim) { - if (dim > 0) - return AASTORE; - - switch (type) { - case DOUBLE : - return DASTORE; - case FLOAT : - return FASTORE; - case LONG : - return LASTORE; - case INT : - return IASTORE; - case SHORT : - return SASTORE; - case CHAR : - return CASTORE; - case BYTE : - case BOOLEAN : - return BASTORE; - default : - return AASTORE; - } - } - - private void atPlusPlus(int token, ASTree oprand, Expr expr, - boolean doDup) throws CompileError - { - boolean isPost = oprand == null; // ++i or i++? - if (isPost) - oprand = expr.oprand2(); - - if (oprand instanceof Variable) { - Declarator d = ((Variable)oprand).getDeclarator(); - int t = exprType = d.getType(); - arrayDim = d.getArrayDim(); - int var = getLocalVar(d); - if (arrayDim > 0) - badType(expr); - - if (t == DOUBLE) { - bytecode.addDload(var); - if (doDup && isPost) - bytecode.addOpcode(DUP2); - - bytecode.addDconst(1.0); - bytecode.addOpcode(token == PLUSPLUS ? DADD : DSUB); - if (doDup && !isPost) - bytecode.addOpcode(DUP2); - - bytecode.addDstore(var); - } - else if (t == LONG) { - bytecode.addLload(var); - if (doDup && isPost) - bytecode.addOpcode(DUP2); - - bytecode.addLconst((long)1); - bytecode.addOpcode(token == PLUSPLUS ? LADD : LSUB); - if (doDup && !isPost) - bytecode.addOpcode(DUP2); - - bytecode.addLstore(var); - } - else if (t == FLOAT) { - bytecode.addFload(var); - if (doDup && isPost) - bytecode.addOpcode(DUP); - - bytecode.addFconst(1.0f); - bytecode.addOpcode(token == PLUSPLUS ? FADD : FSUB); - if (doDup && !isPost) - bytecode.addOpcode(DUP); - - bytecode.addFstore(var); - } - else if (t == BYTE || t == CHAR || t == SHORT || t == INT) { - if (doDup && isPost) - bytecode.addIload(var); - - int delta = token == PLUSPLUS ? 1 : -1; - if (var > 0xff) { - bytecode.addOpcode(WIDE); - bytecode.addOpcode(IINC); - bytecode.addIndex(var); - bytecode.addIndex(delta); - } - else { - bytecode.addOpcode(IINC); - bytecode.add(var); - bytecode.add(delta); - } - - if (doDup && !isPost) - bytecode.addIload(var); - } - else - badType(expr); - } - else { - if (oprand instanceof Expr) { - Expr e = (Expr)oprand; - if (e.getOperator() == ARRAY) { - atArrayPlusPlus(token, isPost, e, doDup); - return; - } - } - - atFieldPlusPlus(token, isPost, oprand, expr, doDup); - } - } - - public void atArrayPlusPlus(int token, boolean isPost, - Expr expr, boolean doDup) throws CompileError - { - arrayAccess(expr.oprand1(), expr.oprand2()); - int t = exprType; - int dim = arrayDim; - if (dim > 0) - badType(expr); - - bytecode.addOpcode(DUP2); - bytecode.addOpcode(getArrayReadOp(t, arrayDim)); - int dup_code = is2word(t, dim) ? DUP2_X2 : DUP_X2; - atPlusPlusCore(dup_code, doDup, token, isPost, expr); - bytecode.addOpcode(getArrayWriteOp(t, dim)); - } - - protected void atPlusPlusCore(int dup_code, boolean doDup, - int token, boolean isPost, - Expr expr) throws CompileError - { - int t = exprType; - - if (doDup && isPost) - bytecode.addOpcode(dup_code); - - if (t == INT || t == BYTE || t == CHAR || t == SHORT) { - bytecode.addIconst(1); - bytecode.addOpcode(token == PLUSPLUS ? IADD : ISUB); - exprType = INT; - } - else if (t == LONG) { - bytecode.addLconst((long)1); - bytecode.addOpcode(token == PLUSPLUS ? LADD : LSUB); - } - else if (t == FLOAT) { - bytecode.addFconst(1.0f); - bytecode.addOpcode(token == PLUSPLUS ? FADD : FSUB); - } - else if (t == DOUBLE) { - bytecode.addDconst(1.0); - bytecode.addOpcode(token == PLUSPLUS ? DADD : DSUB); - } - else - badType(expr); - - if (doDup && !isPost) - bytecode.addOpcode(dup_code); - } - - protected abstract void atFieldPlusPlus(int token, boolean isPost, - ASTree oprand, Expr expr, boolean doDup) throws CompileError; - - public abstract void atMember(Member n) throws CompileError; - - public void atVariable(Variable v) throws CompileError { - Declarator d = v.getDeclarator(); - exprType = d.getType(); - arrayDim = d.getArrayDim(); - className = d.getClassName(); - int var = getLocalVar(d); - - if (arrayDim > 0) - bytecode.addAload(var); - else - switch (exprType) { - case CLASS : - bytecode.addAload(var); - break; - case LONG : - bytecode.addLload(var); - break; - case FLOAT : - bytecode.addFload(var); - break; - case DOUBLE : - bytecode.addDload(var); - break; - default : // BOOLEAN, BYTE, CHAR, SHORT, INT - bytecode.addIload(var); - break; - } - } - - public void atKeyword(Keyword k) throws CompileError { - arrayDim = 0; - int token = k.get(); - switch (token) { - case TRUE : - bytecode.addIconst(1); - exprType = BOOLEAN; - break; - case FALSE : - bytecode.addIconst(0); - exprType = BOOLEAN; - break; - case NULL : - bytecode.addOpcode(ACONST_NULL); - exprType = NULL; - break; - case THIS : - case SUPER : - if (inStaticMethod) - throw new CompileError("not-available: " - + (token == THIS ? "this" : "super")); - - bytecode.addAload(0); - exprType = CLASS; - if (token == THIS) - className = getThisName(); - else - className = getSuperName(); - break; - default : - fatal(); - } - } - - public void atStringL(StringL s) throws CompileError { - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangString; - bytecode.addLdc(s.get()); - } - - public void atIntConst(IntConst i) throws CompileError { - arrayDim = 0; - long value = i.get(); - int type = i.getType(); - if (type == IntConstant || type == CharConstant) { - exprType = (type == IntConstant ? INT : CHAR); - bytecode.addIconst((int)value); - } - else { - exprType = LONG; - bytecode.addLconst(value); - } - } - - public void atDoubleConst(DoubleConst d) throws CompileError { - arrayDim = 0; - if (d.getType() == DoubleConstant) { - exprType = DOUBLE; - bytecode.addDconst(d.get()); - } - else { - exprType = FLOAT; - bytecode.addFconst((float)d.get()); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/CompileError.java b/src/com/wenshuo/agent/javassist/compiler/CompileError.java deleted file mode 100644 index 7944620..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/CompileError.java +++ /dev/null @@ -1,53 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.NotFoundException; - -public class CompileError extends Exception { - private Lex lex; - private String reason; - - public CompileError(String s, Lex l) { - reason = s; - lex = l; - } - - public CompileError(String s) { - reason = s; - lex = null; - } - - public CompileError(CannotCompileException e) { - this(e.getReason()); - } - - public CompileError(NotFoundException e) { - this("cannot find " + e.getMessage()); - } - - public Lex getLex() { return lex; } - - public String getMessage() { - return reason; - } - - public String toString() { - return "compile error: " + reason; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/Javac.java b/src/com/wenshuo/agent/javassist/compiler/Javac.java deleted file mode 100644 index cfbeb4b..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/Javac.java +++ /dev/null @@ -1,610 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtPrimitiveType; -import com.wenshuo.agent.javassist.CtMember; -import com.wenshuo.agent.javassist.CtField; -import com.wenshuo.agent.javassist.CtBehavior; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.CtConstructor; -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.bytecode.Bytecode; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.LocalVariableAttribute; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.Opcode; -import com.wenshuo.agent.javassist.NotFoundException; - -import com.wenshuo.agent.javassist.compiler.ast.*; - -public class Javac { - JvstCodeGen gen; - SymbolTable stable; - private Bytecode bytecode; - - public static final String param0Name = "$0"; - public static final String resultVarName = "$_"; - public static final String proceedName = "$proceed"; - - /** - * Constructs a compiler. - * - * @param thisClass the class that a compiled method/field - * belongs to. - */ - public Javac(CtClass thisClass) { - this(new Bytecode(thisClass.getClassFile2().getConstPool(), 0, 0), - thisClass); - } - - /** - * Constructs a compiler. - * The produced bytecode is stored in the Bytecode object - * specified by b. - * - * @param thisClass the class that a compiled method/field - * belongs to. - */ - public Javac(Bytecode b, CtClass thisClass) { - gen = new JvstCodeGen(b, thisClass, thisClass.getClassPool()); - stable = new SymbolTable(); - bytecode = b; - } - - /** - * Returns the produced bytecode. - */ - public Bytecode getBytecode() { return bytecode; } - - /** - * Compiles a method, constructor, or field declaration - * to a class. - * A field declaration can declare only one field. - * - *

In a method or constructor body, $0, $1, ... and $_ - * are not available. - * - * @return a CtMethod, CtConstructor, - * or CtField object. - * @see #recordProceed(String,String) - */ - public CtMember compile(String src) throws CompileError { - Parser p = new Parser(new Lex(src)); - ASTList mem = p.parseMember1(stable); - try { - if (mem instanceof FieldDecl) - return compileField((FieldDecl)mem); - else { - CtBehavior cb = compileMethod(p, (MethodDecl)mem); - CtClass decl = cb.getDeclaringClass(); - cb.getMethodInfo2() - .rebuildStackMapIf6(decl.getClassPool(), - decl.getClassFile2()); - return cb; - } - } - catch (BadBytecode bb) { - throw new CompileError(bb.getMessage()); - } - catch (CannotCompileException e) { - throw new CompileError(e.getMessage()); - } - } - - public static class CtFieldWithInit extends CtField { - private ASTree init; - - CtFieldWithInit(CtClass type, String name, CtClass declaring) - throws CannotCompileException - { - super(type, name, declaring); - init = null; - } - - protected void setInit(ASTree i) { init = i; } - - protected ASTree getInitAST() { - return init; - } - } - - private CtField compileField(FieldDecl fd) - throws CompileError, CannotCompileException - { - CtFieldWithInit f; - Declarator d = fd.getDeclarator(); - f = new CtFieldWithInit(gen.resolver.lookupClass(d), - d.getVariable().get(), gen.getThisClass()); - f.setModifiers(MemberResolver.getModifiers(fd.getModifiers())); - if (fd.getInit() != null) - f.setInit(fd.getInit()); - - return f; - } - - private CtBehavior compileMethod(Parser p, MethodDecl md) - throws CompileError - { - int mod = MemberResolver.getModifiers(md.getModifiers()); - CtClass[] plist = gen.makeParamList(md); - CtClass[] tlist = gen.makeThrowsList(md); - recordParams(plist, Modifier.isStatic(mod)); - md = p.parseMethod2(stable, md); - try { - if (md.isConstructor()) { - CtConstructor cons = new CtConstructor(plist, - gen.getThisClass()); - cons.setModifiers(mod); - md.accept(gen); - cons.getMethodInfo().setCodeAttribute( - bytecode.toCodeAttribute()); - cons.setExceptionTypes(tlist); - return cons; - } - else { - Declarator r = md.getReturn(); - CtClass rtype = gen.resolver.lookupClass(r); - recordReturnType(rtype, false); - CtMethod method = new CtMethod(rtype, r.getVariable().get(), - plist, gen.getThisClass()); - method.setModifiers(mod); - gen.setThisMethod(method); - md.accept(gen); - if (md.getBody() != null) - method.getMethodInfo().setCodeAttribute( - bytecode.toCodeAttribute()); - else - method.setModifiers(mod | Modifier.ABSTRACT); - - method.setExceptionTypes(tlist); - return method; - } - } - catch (NotFoundException e) { - throw new CompileError(e.toString()); - } - } - - /** - * Compiles a method (or constructor) body. - * - * @param src a single statement or a block. - * If null, this method produces a body returning zero or null. - */ - public Bytecode compileBody(CtBehavior method, String src) - throws CompileError - { - try { - int mod = method.getModifiers(); - recordParams(method.getParameterTypes(), Modifier.isStatic(mod)); - - CtClass rtype; - if (method instanceof CtMethod) { - gen.setThisMethod((CtMethod)method); - rtype = ((CtMethod)method).getReturnType(); - } - else - rtype = CtClass.voidType; - - recordReturnType(rtype, false); - boolean isVoid = rtype == CtClass.voidType; - - if (src == null) - makeDefaultBody(bytecode, rtype); - else { - Parser p = new Parser(new Lex(src)); - SymbolTable stb = new SymbolTable(stable); - Stmnt s = p.parseStatement(stb); - if (p.hasMore()) - throw new CompileError( - "the method/constructor body must be surrounded by {}"); - - boolean callSuper = false; - if (method instanceof CtConstructor) - callSuper = !((CtConstructor)method).isClassInitializer(); - - gen.atMethodBody(s, callSuper, isVoid); - } - - return bytecode; - } - catch (NotFoundException e) { - throw new CompileError(e.toString()); - } - } - - private static void makeDefaultBody(Bytecode b, CtClass type) { - int op; - int value; - if (type instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)type; - op = pt.getReturnOp(); - if (op == Opcode.DRETURN) - value = Opcode.DCONST_0; - else if (op == Opcode.FRETURN) - value = Opcode.FCONST_0; - else if (op == Opcode.LRETURN) - value = Opcode.LCONST_0; - else if (op == Opcode.RETURN) - value = Opcode.NOP; - else - value = Opcode.ICONST_0; - } - else { - op = Opcode.ARETURN; - value = Opcode.ACONST_NULL; - } - - if (value != Opcode.NOP) - b.addOpcode(value); - - b.addOpcode(op); - } - - /** - * Records local variables available at the specified program counter. - * If the LocalVariableAttribute is not available, this method does not - * record any local variable. It only returns false. - * - * @param pc program counter (>= 0) - * @return false if the CodeAttribute does not include a - * LocalVariableAttribute. - */ - public boolean recordLocalVariables(CodeAttribute ca, int pc) - throws CompileError - { - LocalVariableAttribute va - = (LocalVariableAttribute) - ca.getAttribute(LocalVariableAttribute.tag); - if (va == null) - return false; - - int n = va.tableLength(); - for (int i = 0; i < n; ++i) { - int start = va.startPc(i); - int len = va.codeLength(i); - if (start <= pc && pc < start + len) - gen.recordVariable(va.descriptor(i), va.variableName(i), - va.index(i), stable); - } - - return true; - } - - /** - * Records parameter names if the LocalVariableAttribute is available. - * It returns false unless the LocalVariableAttribute is available. - * - * @param numOfLocalVars the number of local variables used - * for storing the parameters. - * @return false if the CodeAttribute does not include a - * LocalVariableAttribute. - */ - public boolean recordParamNames(CodeAttribute ca, int numOfLocalVars) - throws CompileError - { - LocalVariableAttribute va - = (LocalVariableAttribute) - ca.getAttribute(LocalVariableAttribute.tag); - if (va == null) - return false; - - int n = va.tableLength(); - for (int i = 0; i < n; ++i) { - int index = va.index(i); - if (index < numOfLocalVars) - gen.recordVariable(va.descriptor(i), va.variableName(i), - index, stable); - } - - return true; - } - - - /** - * Makes variables $0 (this), $1, $2, ..., and $args represent method - * parameters. $args represents an array of all the parameters. - * It also makes $$ available as a parameter list of method call. - * - *

This must be called before calling compileStmnt() and - * compileExpr(). The correct value of - * isStatic must be recorded before compilation. - * maxLocals is updated to include $0,... - */ - public int recordParams(CtClass[] params, boolean isStatic) - throws CompileError - { - return gen.recordParams(params, isStatic, "$", "$args", "$$", stable); - } - - /** - * Makes variables $0, $1, $2, ..., and $args represent method - * parameters. $args represents an array of all the parameters. - * It also makes $$ available as a parameter list of method call. - * $0 can represent a local variable other than THIS (variable 0). - * $class is also made available. - * - *

This must be called before calling compileStmnt() and - * compileExpr(). The correct value of - * isStatic must be recorded before compilation. - * maxLocals is updated to include $0,... - * - * @param use0 true if $0 is used. - * @param varNo the register number of $0 (use0 is true) - * or $1 (otherwise). - * @param target the type of $0 (it can be null if use0 is false). - * It is used as the name of the type represented - * by $class. - * @param isStatic true if the method in which the compiled bytecode - * is embedded is static. - */ - public int recordParams(String target, CtClass[] params, - boolean use0, int varNo, boolean isStatic) - throws CompileError - { - return gen.recordParams(params, isStatic, "$", "$args", "$$", - use0, varNo, target, stable); - } - - /** - * Sets maxLocals to max. - * This method tells the compiler the local variables that have been - * allocated for the rest of the code. When the compiler needs - * new local variables, the local variables at the index max, - * max + 1, ... are assigned. - * - *

This method is indirectly called by recordParams. - */ - public void setMaxLocals(int max) { - gen.setMaxLocals(max); - } - - /** - * Prepares to use cast $r, $w, $_, and $type. - * $type is made to represent the specified return type. - * It also enables to write a return statement with a return value - * for void method. - * - *

If the return type is void, ($r) does nothing. - * The type of $_ is java.lang.Object. - * - * @param type the return type. - * @param useResultVar true if $_ is used. - * @return -1 or the variable index assigned to $_. - * @see #recordType(CtClass) - */ - public int recordReturnType(CtClass type, boolean useResultVar) - throws CompileError - { - gen.recordType(type); - return gen.recordReturnType(type, "$r", - (useResultVar ? resultVarName : null), stable); - } - - /** - * Prepares to use $type. Note that recordReturnType() overwrites - * the value of $type. - * - * @param t the type represented by $type. - */ - public void recordType(CtClass t) { - gen.recordType(t); - } - - /** - * Makes the given variable available. - * - * @param type variable type - * @param name variable name - */ - public int recordVariable(CtClass type, String name) - throws CompileError - { - return gen.recordVariable(type, name, stable); - } - - /** - * Prepares to use $proceed(). - * If the return type of $proceed() is void, null is pushed on the - * stack. - * - * @param target an expression specifying the target object. - * if null, "this" is the target. - * @param method the method name. - */ - public void recordProceed(String target, String method) - throws CompileError - { - Parser p = new Parser(new Lex(target)); - final ASTree texpr = p.parseExpression(stable); - final String m = method; - - ProceedHandler h = new ProceedHandler() { - public void doit(JvstCodeGen gen, Bytecode b, ASTList args) - throws CompileError - { - ASTree expr = new Member(m); - if (texpr != null) - expr = Expr.make('.', texpr, expr); - - expr = CallExpr.makeCall(expr, args); - gen.compileExpr(expr); - gen.addNullIfVoid(); - } - - public void setReturnType(JvstTypeChecker check, ASTList args) - throws CompileError - { - ASTree expr = new Member(m); - if (texpr != null) - expr = Expr.make('.', texpr, expr); - - expr = CallExpr.makeCall(expr, args); - expr.accept(check); - check.addNullIfVoid(); - } - }; - - gen.setProceedHandler(h, proceedName); - } - - /** - * Prepares to use $proceed() representing a static method. - * If the return type of $proceed() is void, null is pushed on the - * stack. - * - * @param targetClass the fully-qualified dot-separated name - * of the class declaring the method. - * @param method the method name. - */ - public void recordStaticProceed(String targetClass, String method) - throws CompileError - { - final String c = targetClass; - final String m = method; - - ProceedHandler h = new ProceedHandler() { - public void doit(JvstCodeGen gen, Bytecode b, ASTList args) - throws CompileError - { - Expr expr = Expr.make(TokenId.MEMBER, - new Symbol(c), new Member(m)); - expr = CallExpr.makeCall(expr, args); - gen.compileExpr(expr); - gen.addNullIfVoid(); - } - - public void setReturnType(JvstTypeChecker check, ASTList args) - throws CompileError - { - Expr expr = Expr.make(TokenId.MEMBER, - new Symbol(c), new Member(m)); - expr = CallExpr.makeCall(expr, args); - expr.accept(check); - check.addNullIfVoid(); - } - }; - - gen.setProceedHandler(h, proceedName); - } - - /** - * Prepares to use $proceed() representing a private/super's method. - * If the return type of $proceed() is void, null is pushed on the - * stack. This method is for methods invoked by INVOKESPECIAL. - * - * @param target an expression specifying the target object. - * if null, "this" is the target. - * @param classname the class name declaring the method. - * @param methodname the method name. - * @param descriptor the method descriptor. - */ - public void recordSpecialProceed(String target, String classname, - String methodname, String descriptor) - throws CompileError - { - Parser p = new Parser(new Lex(target)); - final ASTree texpr = p.parseExpression(stable); - final String cname = classname; - final String method = methodname; - final String desc = descriptor; - - ProceedHandler h = new ProceedHandler() { - public void doit(JvstCodeGen gen, Bytecode b, ASTList args) - throws CompileError - { - gen.compileInvokeSpecial(texpr, cname, method, desc, args); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.compileInvokeSpecial(texpr, cname, method, desc, args); - } - - }; - - gen.setProceedHandler(h, proceedName); - } - - /** - * Prepares to use $proceed(). - */ - public void recordProceed(ProceedHandler h) { - gen.setProceedHandler(h, proceedName); - } - - /** - * Compiles a statement (or a block). - * recordParams() must be called before invoking - * this method. - * - *

Local variables that are not declared - * in the compiled source text might not be accessible within that - * source text. Fields and method parameters ($0, $1, ..) are available. - */ - public void compileStmnt(String src) throws CompileError { - Parser p = new Parser(new Lex(src)); - SymbolTable stb = new SymbolTable(stable); - while (p.hasMore()) { - Stmnt s = p.parseStatement(stb); - if (s != null) - s.accept(gen); - } - } - - /** - * Compiles an exression. recordParams() must be - * called before invoking this method. - * - *

Local variables are not accessible - * within the compiled source text. Fields and method parameters - * ($0, $1, ..) are available if recordParams() - * have been invoked. - */ - public void compileExpr(String src) throws CompileError { - ASTree e = parseExpr(src, stable); - compileExpr(e); - } - - /** - * Parsers an expression. - */ - public static ASTree parseExpr(String src, SymbolTable st) - throws CompileError - { - Parser p = new Parser(new Lex(src)); - return p.parseExpression(st); - } - - /** - * Compiles an exression. recordParams() must be - * called before invoking this method. - * - *

Local variables are not accessible - * within the compiled source text. Fields and method parameters - * ($0, $1, ..) are available if recordParams() - * have been invoked. - */ - public void compileExpr(ASTree e) throws CompileError { - if (e != null) - gen.compileExpr(e); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java b/src/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java deleted file mode 100644 index 7eb03ab..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java +++ /dev/null @@ -1,710 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.ast.*; - -/* Code generator accepting extended Java syntax for Javassist. - */ - -public class JvstCodeGen extends MemberCodeGen { - String paramArrayName = null; - String paramListName = null; - CtClass[] paramTypeList = null; - private int paramVarBase = 0; // variable index for $0 or $1. - private boolean useParam0 = false; // true if $0 is used. - private String param0Type = null; // JVM name - public static final String sigName = "$sig"; - public static final String dollarTypeName = "$type"; - public static final String clazzName = "$class"; - private CtClass dollarType = null; - CtClass returnType = null; - String returnCastName = null; - private String returnVarName = null; // null if $_ is not used. - public static final String wrapperCastName = "$w"; - String proceedName = null; - public static final String cflowName = "$cflow"; - ProceedHandler procHandler = null; // null if not used. - - public JvstCodeGen(Bytecode b, CtClass cc, ClassPool cp) { - super(b, cc, cp); - setTypeChecker(new JvstTypeChecker(cc, cp, this)); - } - - /* Index of $1. - */ - private int indexOfParam1() { - return paramVarBase + (useParam0 ? 1 : 0); - } - - /* Records a ProceedHandler obejct. - * - * @param name the name of the special method call. - * it is usually $proceed. - */ - public void setProceedHandler(ProceedHandler h, String name) { - proceedName = name; - procHandler = h; - } - - /* If the type of the expression compiled last is void, - * add ACONST_NULL and change exprType, arrayDim, className. - */ - public void addNullIfVoid() { - if (exprType == VOID) { - bytecode.addOpcode(ACONST_NULL); - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangObject; - } - } - - /* To support $args, $sig, and $type. - * $args is an array of parameter list. - */ - public void atMember(Member mem) throws CompileError { - String name = mem.get(); - if (name.equals(paramArrayName)) { - compileParameterList(bytecode, paramTypeList, indexOfParam1()); - exprType = CLASS; - arrayDim = 1; - className = jvmJavaLangObject; - } - else if (name.equals(sigName)) { - bytecode.addLdc(Descriptor.ofMethod(returnType, paramTypeList)); - bytecode.addInvokestatic("javassist/runtime/Desc", "getParams", - "(Ljava/lang/String;)[Ljava/lang/Class;"); - exprType = CLASS; - arrayDim = 1; - className = "java/lang/Class"; - } - else if (name.equals(dollarTypeName)) { - if (dollarType == null) - throw new CompileError(dollarTypeName + " is not available"); - - bytecode.addLdc(Descriptor.of(dollarType)); - callGetType("getType"); - } - else if (name.equals(clazzName)) { - if (param0Type == null) - throw new CompileError(clazzName + " is not available"); - - bytecode.addLdc(param0Type); - callGetType("getClazz"); - } - else - super.atMember(mem); - } - - private void callGetType(String method) { - bytecode.addInvokestatic("javassist/runtime/Desc", method, - "(Ljava/lang/String;)Ljava/lang/Class;"); - exprType = CLASS; - arrayDim = 0; - className = "java/lang/Class"; - } - - protected void atFieldAssign(Expr expr, int op, ASTree left, - ASTree right, boolean doDup) throws CompileError - { - if (left instanceof Member - && ((Member)left).get().equals(paramArrayName)) { - if (op != '=') - throw new CompileError("bad operator for " + paramArrayName); - - right.accept(this); - if (arrayDim != 1 || exprType != CLASS) - throw new CompileError("invalid type for " + paramArrayName); - - atAssignParamList(paramTypeList, bytecode); - if (!doDup) - bytecode.addOpcode(POP); - } - else - super.atFieldAssign(expr, op, left, right, doDup); - } - - protected void atAssignParamList(CtClass[] params, Bytecode code) - throws CompileError - { - if (params == null) - return; - - int varNo = indexOfParam1(); - int n = params.length; - for (int i = 0; i < n; ++i) { - code.addOpcode(DUP); - code.addIconst(i); - code.addOpcode(AALOAD); - compileUnwrapValue(params[i], code); - code.addStore(varNo, params[i]); - varNo += is2word(exprType, arrayDim) ? 2 : 1; - } - } - - public void atCastExpr(CastExpr expr) throws CompileError { - ASTList classname = expr.getClassName(); - if (classname != null && expr.getArrayDim() == 0) { - ASTree p = classname.head(); - if (p instanceof Symbol && classname.tail() == null) { - String typename = ((Symbol)p).get(); - if (typename.equals(returnCastName)) { - atCastToRtype(expr); - return; - } - else if (typename.equals(wrapperCastName)) { - atCastToWrapper(expr); - return; - } - } - } - - super.atCastExpr(expr); - } - - /** - * Inserts a cast operator to the return type. - * If the return type is void, this does nothing. - */ - protected void atCastToRtype(CastExpr expr) throws CompileError { - expr.getOprand().accept(this); - if (exprType == VOID || isRefType(exprType) || arrayDim > 0) - compileUnwrapValue(returnType, bytecode); - else if (returnType instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)returnType; - int destType = MemberResolver.descToType(pt.getDescriptor()); - atNumCastExpr(exprType, destType); - exprType = destType; - arrayDim = 0; - className = null; - } - else - throw new CompileError("invalid cast"); - } - - protected void atCastToWrapper(CastExpr expr) throws CompileError { - expr.getOprand().accept(this); - if (isRefType(exprType) || arrayDim > 0) - return; // Object type. do nothing. - - CtClass clazz = resolver.lookupClass(exprType, arrayDim, className); - if (clazz instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)clazz; - String wrapper = pt.getWrapperName(); - bytecode.addNew(wrapper); // new - bytecode.addOpcode(DUP); // dup - if (pt.getDataSize() > 1) - bytecode.addOpcode(DUP2_X2); // dup2_x2 - else - bytecode.addOpcode(DUP2_X1); // dup2_x1 - - bytecode.addOpcode(POP2); // pop2 - bytecode.addInvokespecial(wrapper, "", - "(" + pt.getDescriptor() + ")V"); - // invokespecial - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangObject; - } - } - - /* Delegates to a ProcHandler object if the method call is - * $proceed(). It may process $cflow(). - */ - public void atCallExpr(CallExpr expr) throws CompileError { - ASTree method = expr.oprand1(); - if (method instanceof Member) { - String name = ((Member)method).get(); - if (procHandler != null && name.equals(proceedName)) { - procHandler.doit(this, bytecode, (ASTList)expr.oprand2()); - return; - } - else if (name.equals(cflowName)) { - atCflow((ASTList)expr.oprand2()); - return; - } - } - - super.atCallExpr(expr); - } - - /* To support $cflow(). - */ - protected void atCflow(ASTList cname) throws CompileError { - StringBuffer sbuf = new StringBuffer(); - if (cname == null || cname.tail() != null) - throw new CompileError("bad " + cflowName); - - makeCflowName(sbuf, cname.head()); - String name = sbuf.toString(); - Object[] names = resolver.getClassPool().lookupCflow(name); - if (names == null) - throw new CompileError("no such " + cflowName + ": " + name); - - bytecode.addGetstatic((String)names[0], (String)names[1], - "Ljavassist/runtime/Cflow;"); - bytecode.addInvokevirtual("javassist.runtime.Cflow", - "value", "()I"); - exprType = INT; - arrayDim = 0; - className = null; - } - - /* Syntax: - * - * : $cflow '(' ')' - * : ('.' )* - */ - private static void makeCflowName(StringBuffer sbuf, ASTree name) - throws CompileError - { - if (name instanceof Symbol) { - sbuf.append(((Symbol)name).get()); - return; - } - else if (name instanceof Expr) { - Expr expr = (Expr)name; - if (expr.getOperator() == '.') { - makeCflowName(sbuf, expr.oprand1()); - sbuf.append('.'); - makeCflowName(sbuf, expr.oprand2()); - return; - } - } - - throw new CompileError("bad " + cflowName); - } - - /* To support $$. ($$) is equivalent to ($1, ..., $n). - * It can be used only as a parameter list of method call. - */ - public boolean isParamListName(ASTList args) { - if (paramTypeList != null - && args != null && args.tail() == null) { - ASTree left = args.head(); - return (left instanceof Member - && ((Member)left).get().equals(paramListName)); - } - else - return false; - } - - /* - public int getMethodArgsLength(ASTList args) { - if (!isParamListName(args)) - return super.getMethodArgsLength(args); - - return paramTypeList.length; - } - */ - - public int getMethodArgsLength(ASTList args) { - String pname = paramListName; - int n = 0; - while (args != null) { - ASTree a = args.head(); - if (a instanceof Member && ((Member)a).get().equals(pname)) { - if (paramTypeList != null) - n += paramTypeList.length; - } - else - ++n; - - args = args.tail(); - } - - return n; - } - - public void atMethodArgs(ASTList args, int[] types, int[] dims, - String[] cnames) throws CompileError { - CtClass[] params = paramTypeList; - String pname = paramListName; - int i = 0; - while (args != null) { - ASTree a = args.head(); - if (a instanceof Member && ((Member)a).get().equals(pname)) { - if (params != null) { - int n = params.length; - int regno = indexOfParam1(); - for (int k = 0; k < n; ++k) { - CtClass p = params[k]; - regno += bytecode.addLoad(regno, p); - setType(p); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - } - } - } - else { - a.accept(this); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - } - - args = args.tail(); - } - } - - /* - public void atMethodArgs(ASTList args, int[] types, int[] dims, - String[] cnames) throws CompileError { - if (!isParamListName(args)) { - super.atMethodArgs(args, types, dims, cnames); - return; - } - - CtClass[] params = paramTypeList; - if (params == null) - return; - - int n = params.length; - int regno = indexOfParam1(); - for (int i = 0; i < n; ++i) { - CtClass p = params[i]; - regno += bytecode.addLoad(regno, p); - setType(p); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - } - } - */ - - /* called by Javac#recordSpecialProceed(). - */ - void compileInvokeSpecial(ASTree target, String classname, - String methodname, String descriptor, - ASTList args) - throws CompileError - { - target.accept(this); - int nargs = getMethodArgsLength(args); - atMethodArgs(args, new int[nargs], new int[nargs], - new String[nargs]); - bytecode.addInvokespecial(classname, methodname, descriptor); - setReturnType(descriptor, false, false); - addNullIfVoid(); - } - - /* - * Makes it valid to write "return ;" for a void method. - */ - protected void atReturnStmnt(Stmnt st) throws CompileError { - ASTree result = st.getLeft(); - if (result != null && returnType == CtClass.voidType) { - compileExpr(result); - if (is2word(exprType, arrayDim)) - bytecode.addOpcode(POP2); - else if (exprType != VOID) - bytecode.addOpcode(POP); - - result = null; - } - - atReturnStmnt2(result); - } - - /** - * Makes a cast to the return type ($r) available. - * It also enables $_. - * - *

If the return type is void, ($r) does nothing. - * The type of $_ is java.lang.Object. - * - * @param resultName null if $_ is not used. - * @return -1 or the variable index assigned to $_. - */ - public int recordReturnType(CtClass type, String castName, - String resultName, SymbolTable tbl) throws CompileError - { - returnType = type; - returnCastName = castName; - returnVarName = resultName; - if (resultName == null) - return -1; - else { - int varNo = getMaxLocals(); - int locals = varNo + recordVar(type, resultName, varNo, tbl); - setMaxLocals(locals); - return varNo; - } - } - - /** - * Makes $type available. - */ - public void recordType(CtClass t) { - dollarType = t; - } - - /** - * Makes method parameters $0, $1, ..., $args, $$, and $class available. - * $0 is equivalent to THIS if the method is not static. Otherwise, - * if the method is static, then $0 is not available. - */ - public int recordParams(CtClass[] params, boolean isStatic, - String prefix, String paramVarName, - String paramsName, SymbolTable tbl) - throws CompileError - { - return recordParams(params, isStatic, prefix, paramVarName, - paramsName, !isStatic, 0, getThisName(), tbl); - } - - /** - * Makes method parameters $0, $1, ..., $args, $$, and $class available. - * $0 is available only if use0 is true. It might not be equivalent - * to THIS. - * - * @param params the parameter types (the types of $1, $2, ..) - * @param prefix it must be "$" (the first letter of $0, $1, ...) - * @param paramVarName it must be "$args" - * @param paramsName it must be "$$" - * @param use0 true if $0 is used. - * @param paramBase the register number of $0 (use0 is true) - * or $1 (otherwise). - * @param target the class of $0. If use0 is false, target - * can be null. The value of "target" is also used - * as the name of the type represented by $class. - * @param isStatic true if the method in which the compiled bytecode - * is embedded is static. - */ - public int recordParams(CtClass[] params, boolean isStatic, - String prefix, String paramVarName, - String paramsName, boolean use0, - int paramBase, String target, - SymbolTable tbl) - throws CompileError - { - int varNo; - - paramTypeList = params; - paramArrayName = paramVarName; - paramListName = paramsName; - paramVarBase = paramBase; - useParam0 = use0; - - if (target != null) - param0Type = MemberResolver.jvmToJavaName(target); - - inStaticMethod = isStatic; - varNo = paramBase; - if (use0) { - String varName = prefix + "0"; - Declarator decl - = new Declarator(CLASS, MemberResolver.javaToJvmName(target), - 0, varNo++, new Symbol(varName)); - tbl.append(varName, decl); - } - - for (int i = 0; i < params.length; ++i) - varNo += recordVar(params[i], prefix + (i + 1), varNo, tbl); - - if (getMaxLocals() < varNo) - setMaxLocals(varNo); - - return varNo; - } - - /** - * Makes the given variable name available. - * - * @param type variable type - * @param varName variable name - */ - public int recordVariable(CtClass type, String varName, SymbolTable tbl) - throws CompileError - { - if (varName == null) - return -1; - else { - int varNo = getMaxLocals(); - int locals = varNo + recordVar(type, varName, varNo, tbl); - setMaxLocals(locals); - return varNo; - } - } - - private int recordVar(CtClass cc, String varName, int varNo, - SymbolTable tbl) throws CompileError - { - if (cc == CtClass.voidType) { - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangObject; - } - else - setType(cc); - - Declarator decl - = new Declarator(exprType, className, arrayDim, - varNo, new Symbol(varName)); - tbl.append(varName, decl); - return is2word(exprType, arrayDim) ? 2 : 1; - } - - /** - * Makes the given variable name available. - * - * @param typeDesc the type descriptor of the variable - * @param varName variable name - * @param varNo an index into the local variable array - */ - public void recordVariable(String typeDesc, String varName, int varNo, - SymbolTable tbl) throws CompileError - { - char c; - int dim = 0; - while ((c = typeDesc.charAt(dim)) == '[') - ++dim; - - int type = MemberResolver.descToType(c); - String cname = null; - if (type == CLASS) { - if (dim == 0) - cname = typeDesc.substring(1, typeDesc.length() - 1); - else - cname = typeDesc.substring(dim + 1, typeDesc.length() - 1); - } - - Declarator decl - = new Declarator(type, cname, dim, varNo, new Symbol(varName)); - tbl.append(varName, decl); - } - - /* compileParameterList() returns the stack size used - * by the produced code. - * - * This method correctly computes the max_stack value. - * - * @param regno the index of the local variable in which - * the first argument is received. - * (0: static method, 1: regular method.) - */ - public static int compileParameterList(Bytecode code, - CtClass[] params, int regno) { - if (params == null) { - code.addIconst(0); // iconst_0 - code.addAnewarray(javaLangObject); // anewarray Object - return 1; - } - else { - CtClass[] args = new CtClass[1]; - int n = params.length; - code.addIconst(n); // iconst_ - code.addAnewarray(javaLangObject); // anewarray Object - for (int i = 0; i < n; ++i) { - code.addOpcode(Bytecode.DUP); // dup - code.addIconst(i); // iconst_ - if (params[i].isPrimitive()) { - CtPrimitiveType pt = (CtPrimitiveType)params[i]; - String wrapper = pt.getWrapperName(); - code.addNew(wrapper); // new - code.addOpcode(Bytecode.DUP); // dup - int s = code.addLoad(regno, pt); // ?load - regno += s; - args[0] = pt; - code.addInvokespecial(wrapper, "", - Descriptor.ofMethod(CtClass.voidType, args)); - // invokespecial - } - else { - code.addAload(regno); // aload - ++regno; - } - - code.addOpcode(Bytecode.AASTORE); // aastore - } - - return 8; - } - } - - protected void compileUnwrapValue(CtClass type, Bytecode code) - throws CompileError - { - if (type == CtClass.voidType) { - addNullIfVoid(); - return; - } - - if (exprType == VOID) - throw new CompileError("invalid type for " + returnCastName); - - if (type instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)type; - // pt is not voidType. - String wrapper = pt.getWrapperName(); - code.addCheckcast(wrapper); - code.addInvokevirtual(wrapper, pt.getGetMethodName(), - pt.getGetMethodDescriptor()); - setType(type); - } - else { - code.addCheckcast(type); - setType(type); - } - } - - /* Sets exprType, arrayDim, and className; - * If type is void, then this method does nothing. - */ - public void setType(CtClass type) throws CompileError { - setType(type, 0); - } - - private void setType(CtClass type, int dim) throws CompileError { - if (type.isPrimitive()) { - CtPrimitiveType pt = (CtPrimitiveType)type; - exprType = MemberResolver.descToType(pt.getDescriptor()); - arrayDim = dim; - className = null; - } - else if (type.isArray()) - try { - setType(type.getComponentType(), dim + 1); - } - catch (NotFoundException e) { - throw new CompileError("undefined type: " + type.getName()); - } - else { - exprType = CLASS; - arrayDim = dim; - className = MemberResolver.javaToJvmName(type.getName()); - } - } - - /* Performs implicit coercion from exprType to type. - */ - public void doNumCast(CtClass type) throws CompileError { - if (arrayDim == 0 && !isRefType(exprType)) - if (type instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)type; - atNumCastExpr(exprType, - MemberResolver.descToType(pt.getDescriptor())); - } - else - throw new CompileError("type mismatch"); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java b/src/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java deleted file mode 100644 index a28aaad..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java +++ /dev/null @@ -1,282 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.compiler.ast.*; - -/* Type checker accepting extended Java syntax for Javassist. - */ - -public class JvstTypeChecker extends TypeChecker { - private JvstCodeGen codeGen; - - public JvstTypeChecker(CtClass cc, ClassPool cp, JvstCodeGen gen) { - super(cc, cp); - codeGen = gen; - } - - /* If the type of the expression compiled last is void, - * add ACONST_NULL and change exprType, arrayDim, className. - */ - public void addNullIfVoid() { - if (exprType == VOID) { - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangObject; - } - } - - /* To support $args, $sig, and $type. - * $args is an array of parameter list. - */ - public void atMember(Member mem) throws CompileError { - String name = mem.get(); - if (name.equals(codeGen.paramArrayName)) { - exprType = CLASS; - arrayDim = 1; - className = jvmJavaLangObject; - } - else if (name.equals(JvstCodeGen.sigName)) { - exprType = CLASS; - arrayDim = 1; - className = "java/lang/Class"; - } - else if (name.equals(JvstCodeGen.dollarTypeName) - || name.equals(JvstCodeGen.clazzName)) { - exprType = CLASS; - arrayDim = 0; - className = "java/lang/Class"; - } - else - super.atMember(mem); - } - - protected void atFieldAssign(Expr expr, int op, ASTree left, ASTree right) - throws CompileError - { - if (left instanceof Member - && ((Member)left).get().equals(codeGen.paramArrayName)) { - right.accept(this); - CtClass[] params = codeGen.paramTypeList; - if (params == null) - return; - - int n = params.length; - for (int i = 0; i < n; ++i) - compileUnwrapValue(params[i]); - } - else - super.atFieldAssign(expr, op, left, right); - } - - public void atCastExpr(CastExpr expr) throws CompileError { - ASTList classname = expr.getClassName(); - if (classname != null && expr.getArrayDim() == 0) { - ASTree p = classname.head(); - if (p instanceof Symbol && classname.tail() == null) { - String typename = ((Symbol)p).get(); - if (typename.equals(codeGen.returnCastName)) { - atCastToRtype(expr); - return; - } - else if (typename.equals(JvstCodeGen.wrapperCastName)) { - atCastToWrapper(expr); - return; - } - } - } - - super.atCastExpr(expr); - } - - /** - * Inserts a cast operator to the return type. - * If the return type is void, this does nothing. - */ - protected void atCastToRtype(CastExpr expr) throws CompileError { - CtClass returnType = codeGen.returnType; - expr.getOprand().accept(this); - if (exprType == VOID || CodeGen.isRefType(exprType) || arrayDim > 0) - compileUnwrapValue(returnType); - else if (returnType instanceof CtPrimitiveType) { - CtPrimitiveType pt = (CtPrimitiveType)returnType; - int destType = MemberResolver.descToType(pt.getDescriptor()); - exprType = destType; - arrayDim = 0; - className = null; - } - } - - protected void atCastToWrapper(CastExpr expr) throws CompileError { - expr.getOprand().accept(this); - if (CodeGen.isRefType(exprType) || arrayDim > 0) - return; // Object type. do nothing. - - CtClass clazz = resolver.lookupClass(exprType, arrayDim, className); - if (clazz instanceof CtPrimitiveType) { - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangObject; - } - } - - /* Delegates to a ProcHandler object if the method call is - * $proceed(). It may process $cflow(). - */ - public void atCallExpr(CallExpr expr) throws CompileError { - ASTree method = expr.oprand1(); - if (method instanceof Member) { - String name = ((Member)method).get(); - if (codeGen.procHandler != null - && name.equals(codeGen.proceedName)) { - codeGen.procHandler.setReturnType(this, - (ASTList)expr.oprand2()); - return; - } - else if (name.equals(JvstCodeGen.cflowName)) { - atCflow((ASTList)expr.oprand2()); - return; - } - } - - super.atCallExpr(expr); - } - - /* To support $cflow(). - */ - protected void atCflow(ASTList cname) throws CompileError { - exprType = INT; - arrayDim = 0; - className = null; - } - - /* To support $$. ($$) is equivalent to ($1, ..., $n). - * It can be used only as a parameter list of method call. - */ - public boolean isParamListName(ASTList args) { - if (codeGen.paramTypeList != null - && args != null && args.tail() == null) { - ASTree left = args.head(); - return (left instanceof Member - && ((Member)left).get().equals(codeGen.paramListName)); - } - else - return false; - } - - public int getMethodArgsLength(ASTList args) { - String pname = codeGen.paramListName; - int n = 0; - while (args != null) { - ASTree a = args.head(); - if (a instanceof Member && ((Member)a).get().equals(pname)) { - if (codeGen.paramTypeList != null) - n += codeGen.paramTypeList.length; - } - else - ++n; - - args = args.tail(); - } - - return n; - } - - public void atMethodArgs(ASTList args, int[] types, int[] dims, - String[] cnames) throws CompileError { - CtClass[] params = codeGen.paramTypeList; - String pname = codeGen.paramListName; - int i = 0; - while (args != null) { - ASTree a = args.head(); - if (a instanceof Member && ((Member)a).get().equals(pname)) { - if (params != null) { - int n = params.length; - for (int k = 0; k < n; ++k) { - CtClass p = params[k]; - setType(p); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - } - } - } - else { - a.accept(this); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - } - - args = args.tail(); - } - } - - /* called by Javac#recordSpecialProceed(). - */ - void compileInvokeSpecial(ASTree target, String classname, - String methodname, String descriptor, - ASTList args) - throws CompileError - { - target.accept(this); - int nargs = getMethodArgsLength(args); - atMethodArgs(args, new int[nargs], new int[nargs], - new String[nargs]); - setReturnType(descriptor); - addNullIfVoid(); - } - - protected void compileUnwrapValue(CtClass type) throws CompileError - { - if (type == CtClass.voidType) - addNullIfVoid(); - else - setType(type); - } - - /* Sets exprType, arrayDim, and className; - * If type is void, then this method does nothing. - */ - public void setType(CtClass type) throws CompileError { - setType(type, 0); - } - - private void setType(CtClass type, int dim) throws CompileError { - if (type.isPrimitive()) { - CtPrimitiveType pt = (CtPrimitiveType)type; - exprType = MemberResolver.descToType(pt.getDescriptor()); - arrayDim = dim; - className = null; - } - else if (type.isArray()) - try { - setType(type.getComponentType(), dim + 1); - } - catch (NotFoundException e) { - throw new CompileError("undefined type: " + type.getName()); - } - else { - exprType = CLASS; - arrayDim = dim; - className = MemberResolver.javaToJvmName(type.getName()); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/KeywordTable.java b/src/com/wenshuo/agent/javassist/compiler/KeywordTable.java deleted file mode 100644 index 8f4aa18..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/KeywordTable.java +++ /dev/null @@ -1,33 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -public final class KeywordTable extends java.util.HashMap { - public KeywordTable() { super(); } - - public int lookup(String name) { - Object found = get(name); - if (found == null) - return -1; - else - return ((Integer)found).intValue(); - } - - public void append(String name, int t) { - put(name, new Integer(t)); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/Lex.java b/src/com/wenshuo/agent/javassist/compiler/Lex.java deleted file mode 100644 index f83e802..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/Lex.java +++ /dev/null @@ -1,551 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -class Token { - public Token next = null; - public int tokenId; - - public long longValue; - public double doubleValue; - public String textValue; -} - -public class Lex implements TokenId { - private int lastChar; - private StringBuffer textBuffer; - private Token currentToken; - private Token lookAheadTokens; - - private String input; - private int position, maxlen, lineNumber; - - /** - * Constructs a lexical analyzer. - */ - public Lex(String s) { - lastChar = -1; - textBuffer = new StringBuffer(); - currentToken = new Token(); - lookAheadTokens = null; - - input = s; - position = 0; - maxlen = s.length(); - lineNumber = 0; - } - - public int get() { - if (lookAheadTokens == null) - return get(currentToken); - else { - Token t; - currentToken = t = lookAheadTokens; - lookAheadTokens = lookAheadTokens.next; - return t.tokenId; - } - } - - /** - * Looks at the next token. - */ - public int lookAhead() { - return lookAhead(0); - } - - public int lookAhead(int i) { - Token tk = lookAheadTokens; - if (tk == null) { - lookAheadTokens = tk = currentToken; // reuse an object! - tk.next = null; - get(tk); - } - - for (; i-- > 0; tk = tk.next) - if (tk.next == null) { - Token tk2; - tk.next = tk2 = new Token(); - get(tk2); - } - - currentToken = tk; - return tk.tokenId; - } - - public String getString() { - return currentToken.textValue; - } - - public long getLong() { - return currentToken.longValue; - } - - public double getDouble() { - return currentToken.doubleValue; - } - - private int get(Token token) { - int t; - do { - t = readLine(token); - } while (t == '\n'); - token.tokenId = t; - return t; - } - - private int readLine(Token token) { - int c = getNextNonWhiteChar(); - if(c < 0) - return c; - else if(c == '\n') { - ++lineNumber; - return '\n'; - } - else if (c == '\'') - return readCharConst(token); - else if (c == '"') - return readStringL(token); - else if ('0' <= c && c <= '9') - return readNumber(c, token); - else if(c == '.'){ - c = getc(); - if ('0' <= c && c <= '9') { - StringBuffer tbuf = textBuffer; - tbuf.setLength(0); - tbuf.append('.'); - return readDouble(tbuf, c, token); - } - else{ - ungetc(c); - return readSeparator('.'); - } - } - else if (Character.isJavaIdentifierStart((char)c)) - return readIdentifier(c, token); - else - return readSeparator(c); - } - - private int getNextNonWhiteChar() { - int c; - do { - c = getc(); - if (c == '/') { - c = getc(); - if (c == '/') - do { - c = getc(); - } while (c != '\n' && c != '\r' && c != -1); - else if (c == '*') - while (true) { - c = getc(); - if (c == -1) - break; - else if (c == '*') - if ((c = getc()) == '/') { - c = ' '; - break; - } - else - ungetc(c); - } - else { - ungetc(c); - c = '/'; - } - } - } while(isBlank(c)); - return c; - } - - private int readCharConst(Token token) { - int c; - int value = 0; - while ((c = getc()) != '\'') - if (c == '\\') - value = readEscapeChar(); - else if (c < 0x20) { - if (c == '\n') - ++lineNumber; - - return BadToken; - } - else - value = c; - - token.longValue = value; - return CharConstant; - } - - private int readEscapeChar() { - int c = getc(); - if (c == 'n') - c = '\n'; - else if (c == 't') - c = '\t'; - else if (c == 'r') - c = '\r'; - else if (c == 'f') - c = '\f'; - else if (c == '\n') - ++lineNumber; - - return c; - } - - private int readStringL(Token token) { - int c; - StringBuffer tbuf = textBuffer; - tbuf.setLength(0); - for (;;) { - while ((c = getc()) != '"') { - if (c == '\\') - c = readEscapeChar(); - else if (c == '\n' || c < 0) { - ++lineNumber; - return BadToken; - } - - tbuf.append((char)c); - } - - for (;;) { - c = getc(); - if (c == '\n') - ++lineNumber; - else if (!isBlank(c)) - break; - } - - if (c != '"') { - ungetc(c); - break; - } - } - - token.textValue = tbuf.toString(); - return StringL; - } - - private int readNumber(int c, Token token) { - long value = 0; - int c2 = getc(); - if (c == '0') - if (c2 == 'X' || c2 == 'x') - for (;;) { - c = getc(); - if ('0' <= c && c <= '9') - value = value * 16 + (long)(c - '0'); - else if ('A' <= c && c <= 'F') - value = value * 16 + (long)(c - 'A' + 10); - else if ('a' <= c && c <= 'f') - value = value * 16 + (long)(c - 'a' + 10); - else { - token.longValue = value; - if (c == 'L' || c == 'l') - return LongConstant; - else { - ungetc(c); - return IntConstant; - } - } - } - else if ('0' <= c2 && c2 <= '7') { - value = c2 - '0'; - for (;;) { - c = getc(); - if ('0' <= c && c <= '7') - value = value * 8 + (long)(c - '0'); - else { - token.longValue = value; - if (c == 'L' || c == 'l') - return LongConstant; - else { - ungetc(c); - return IntConstant; - } - } - } - } - - value = c - '0'; - while ('0' <= c2 && c2 <= '9') { - value = value * 10 + c2 - '0'; - c2 = getc(); - } - - token.longValue = value; - if (c2 == 'F' || c2 == 'f') { - token.doubleValue = (double)value; - return FloatConstant; - } - else if (c2 == 'E' || c2 == 'e' - || c2 == 'D' || c2 == 'd' || c2 == '.') { - StringBuffer tbuf = textBuffer; - tbuf.setLength(0); - tbuf.append(value); - return readDouble(tbuf, c2, token); - } - else if (c2 == 'L' || c2 == 'l') - return LongConstant; - else { - ungetc(c2); - return IntConstant; - } - } - - private int readDouble(StringBuffer sbuf, int c, Token token) { - if (c != 'E' && c != 'e' && c != 'D' && c != 'd') { - sbuf.append((char)c); - for (;;) { - c = getc(); - if ('0' <= c && c <= '9') - sbuf.append((char)c); - else - break; - } - } - - if (c == 'E' || c == 'e') { - sbuf.append((char)c); - c = getc(); - if (c == '+' || c == '-') { - sbuf.append((char)c); - c = getc(); - } - - while ('0' <= c && c <= '9') { - sbuf.append((char)c); - c = getc(); - } - } - - try { - token.doubleValue = Double.parseDouble(sbuf.toString()); - } - catch (NumberFormatException e) { - return BadToken; - } - - if (c == 'F' || c == 'f') - return FloatConstant; - else { - if (c != 'D' && c != 'd') - ungetc(c); - - return DoubleConstant; - } - } - - // !"#$%&'( )*+,-./0 12345678 9:;<=>? - private static final int[] equalOps - = { NEQ, 0, 0, 0, MOD_E, AND_E, 0, 0, - 0, MUL_E, PLUS_E, 0, MINUS_E, 0, DIV_E, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, LE, EQ, GE, 0 }; - - private int readSeparator(int c) { - int c2, c3; - if ('!' <= c && c <= '?') { - int t = equalOps[c - '!']; - if (t == 0) - return c; - else { - c2 = getc(); - if (c == c2) - switch (c) { - case '=' : - return EQ; - case '+' : - return PLUSPLUS; - case '-' : - return MINUSMINUS; - case '&' : - return ANDAND; - case '<' : - c3 = getc(); - if (c3 == '=') - return LSHIFT_E; - else { - ungetc(c3); - return LSHIFT; - } - case '>' : - c3 = getc(); - if (c3 == '=') - return RSHIFT_E; - else if (c3 == '>') { - c3 = getc(); - if (c3 == '=') - return ARSHIFT_E; - else { - ungetc(c3); - return ARSHIFT; - } - } - else { - ungetc(c3); - return RSHIFT; - } - default : - break; - } - else if (c2 == '=') - return t; - } - } - else if (c == '^') { - c2 = getc(); - if (c2 == '=') - return EXOR_E; - } - else if (c == '|') { - c2 = getc(); - if (c2 == '=') - return OR_E; - else if (c2 == '|') - return OROR; - } - else - return c; - - ungetc(c2); - return c; - } - - private int readIdentifier(int c, Token token) { - StringBuffer tbuf = textBuffer; - tbuf.setLength(0); - - do { - tbuf.append((char)c); - c = getc(); - } while (Character.isJavaIdentifierPart((char)c)); - - ungetc(c); - - String name = tbuf.toString(); - int t = ktable.lookup(name); - if (t >= 0) - return t; - else { - /* tbuf.toString() is executed quickly since it does not - * need memory copy. Using a hand-written extensible - * byte-array class instead of StringBuffer is not a good idea - * for execution speed. Converting a byte array to a String - * object is very slow. Using an extensible char array - * might be OK. - */ - token.textValue = name; - return Identifier; - } - } - - private static final KeywordTable ktable = new KeywordTable(); - - static { - ktable.append("abstract", ABSTRACT); - ktable.append("boolean", BOOLEAN); - ktable.append("break", BREAK); - ktable.append("byte", BYTE); - ktable.append("case", CASE); - ktable.append("catch", CATCH); - ktable.append("char", CHAR); - ktable.append("class", CLASS); - ktable.append("const", CONST); - ktable.append("continue", CONTINUE); - ktable.append("default", DEFAULT); - ktable.append("do", DO); - ktable.append("double", DOUBLE); - ktable.append("else", ELSE); - ktable.append("extends", EXTENDS); - ktable.append("false", FALSE); - ktable.append("final", FINAL); - ktable.append("finally", FINALLY); - ktable.append("float", FLOAT); - ktable.append("for", FOR); - ktable.append("goto", GOTO); - ktable.append("if", IF); - ktable.append("implements", IMPLEMENTS); - ktable.append("import", IMPORT); - ktable.append("instanceof", INSTANCEOF); - ktable.append("int", INT); - ktable.append("interface", INTERFACE); - ktable.append("long", LONG); - ktable.append("native", NATIVE); - ktable.append("new", NEW); - ktable.append("null", NULL); - ktable.append("package", PACKAGE); - ktable.append("private", PRIVATE); - ktable.append("protected", PROTECTED); - ktable.append("public", PUBLIC); - ktable.append("return", RETURN); - ktable.append("short", SHORT); - ktable.append("static", STATIC); - ktable.append("strictfp", STRICT); - ktable.append("super", SUPER); - ktable.append("switch", SWITCH); - ktable.append("synchronized", SYNCHRONIZED); - ktable.append("this", THIS); - ktable.append("throw", THROW); - ktable.append("throws", THROWS); - ktable.append("transient", TRANSIENT); - ktable.append("true", TRUE); - ktable.append("try", TRY); - ktable.append("void", VOID); - ktable.append("volatile", VOLATILE); - ktable.append("while", WHILE); - } - - private static boolean isBlank(int c) { - return c == ' ' || c == '\t' || c == '\f' || c == '\r' - || c == '\n'; - } - - private static boolean isDigit(int c) { - return '0' <= c && c <= '9'; - } - - private void ungetc(int c) { - lastChar = c; - } - - public String getTextAround() { - int begin = position - 10; - if (begin < 0) - begin = 0; - - int end = position + 10; - if (end > maxlen) - end = maxlen; - - return input.substring(begin, end); - } - - private int getc() { - if (lastChar < 0) - if (position < maxlen) - return input.charAt(position++); - else - return -1; - else { - int c = lastChar; - lastChar = -1; - return c; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java b/src/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java deleted file mode 100644 index 91d3d28..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java +++ /dev/null @@ -1,1160 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.ast.*; - -import java.util.ArrayList; - -/* Code generator methods depending on javassist.* classes. - */ -public class MemberCodeGen extends CodeGen { - protected MemberResolver resolver; - protected CtClass thisClass; - protected MethodInfo thisMethod; - - protected boolean resultStatic; - - public MemberCodeGen(Bytecode b, CtClass cc, ClassPool cp) { - super(b); - resolver = new MemberResolver(cp); - thisClass = cc; - thisMethod = null; - } - - /** - * Returns the major version of the class file - * targeted by this compilation. - */ - public int getMajorVersion() { - ClassFile cf = thisClass.getClassFile2(); - if (cf == null) - return ClassFile.MAJOR_VERSION; // JDK 1.3 - else - return cf.getMajorVersion(); - } - - /** - * Records the currently compiled method. - */ - public void setThisMethod(CtMethod m) { - thisMethod = m.getMethodInfo2(); - if (typeChecker != null) - typeChecker.setThisMethod(thisMethod); - } - - public CtClass getThisClass() { return thisClass; } - - /** - * Returns the JVM-internal representation of this class name. - */ - protected String getThisName() { - return MemberResolver.javaToJvmName(thisClass.getName()); - } - - /** - * Returns the JVM-internal representation of this super class name. - */ - protected String getSuperName() throws CompileError { - return MemberResolver.javaToJvmName( - MemberResolver.getSuperclass(thisClass).getName()); - } - - protected void insertDefaultSuperCall() throws CompileError { - bytecode.addAload(0); - bytecode.addInvokespecial(MemberResolver.getSuperclass(thisClass), - "", "()V"); - } - - static class JsrHook extends ReturnHook { - ArrayList jsrList; - CodeGen cgen; - int var; - - JsrHook(CodeGen gen) { - super(gen); - jsrList = new ArrayList(); - cgen = gen; - var = -1; - } - - private int getVar(int size) { - if (var < 0) { - var = cgen.getMaxLocals(); - cgen.incMaxLocals(size); - } - - return var; - } - - private void jsrJmp(Bytecode b) { - b.addOpcode(Opcode.GOTO); - jsrList.add(new int[] {b.currentPc(), var}); - b.addIndex(0); - } - - protected boolean doit(Bytecode b, int opcode) { - switch (opcode) { - case Opcode.RETURN : - jsrJmp(b); - break; - case ARETURN : - b.addAstore(getVar(1)); - jsrJmp(b); - b.addAload(var); - break; - case IRETURN : - b.addIstore(getVar(1)); - jsrJmp(b); - b.addIload(var); - break; - case LRETURN : - b.addLstore(getVar(2)); - jsrJmp(b); - b.addLload(var); - break; - case DRETURN : - b.addDstore(getVar(2)); - jsrJmp(b); - b.addDload(var); - break; - case FRETURN : - b.addFstore(getVar(1)); - jsrJmp(b); - b.addFload(var); - break; - default : - throw new RuntimeException("fatal"); - } - - return false; - } - } - - static class JsrHook2 extends ReturnHook { - int var; - int target; - - JsrHook2(CodeGen gen, int[] retTarget) { - super(gen); - target = retTarget[0]; - var = retTarget[1]; - } - - protected boolean doit(Bytecode b, int opcode) { - switch (opcode) { - case Opcode.RETURN : - break; - case ARETURN : - b.addAstore(var); - break; - case IRETURN : - b.addIstore(var); - break; - case LRETURN : - b.addLstore(var); - break; - case DRETURN : - b.addDstore(var); - break; - case FRETURN : - b.addFstore(var); - break; - default : - throw new RuntimeException("fatal"); - } - - b.addOpcode(Opcode.GOTO); - b.addIndex(target - b.currentPc() + 3); - return true; - } - } - - protected void atTryStmnt(Stmnt st) throws CompileError { - Bytecode bc = bytecode; - Stmnt body = (Stmnt)st.getLeft(); - if (body == null) - return; - - ASTList catchList = (ASTList)st.getRight().getLeft(); - Stmnt finallyBlock = (Stmnt)st.getRight().getRight().getLeft(); - ArrayList gotoList = new ArrayList(); - - JsrHook jsrHook = null; - if (finallyBlock != null) - jsrHook = new JsrHook(this); - - int start = bc.currentPc(); - body.accept(this); - int end = bc.currentPc(); - if (start == end) - throw new CompileError("empty try block"); - - boolean tryNotReturn = !hasReturned; - if (tryNotReturn) { - bc.addOpcode(Opcode.GOTO); - gotoList.add(new Integer(bc.currentPc())); - bc.addIndex(0); // correct later - } - - int var = getMaxLocals(); - incMaxLocals(1); - while (catchList != null) { - // catch clause - Pair p = (Pair)catchList.head(); - catchList = catchList.tail(); - Declarator decl = (Declarator)p.getLeft(); - Stmnt block = (Stmnt)p.getRight(); - - decl.setLocalVar(var); - - CtClass type = resolver.lookupClassByJvmName(decl.getClassName()); - decl.setClassName(MemberResolver.javaToJvmName(type.getName())); - bc.addExceptionHandler(start, end, bc.currentPc(), type); - bc.growStack(1); - bc.addAstore(var); - hasReturned = false; - if (block != null) - block.accept(this); - - if (!hasReturned) { - bc.addOpcode(Opcode.GOTO); - gotoList.add(new Integer(bc.currentPc())); - bc.addIndex(0); // correct later - tryNotReturn = true; - } - } - - if (finallyBlock != null) { - jsrHook.remove(this); - // catch (any) clause - int pcAnyCatch = bc.currentPc(); - bc.addExceptionHandler(start, pcAnyCatch, pcAnyCatch, 0); - bc.growStack(1); - bc.addAstore(var); - hasReturned = false; - finallyBlock.accept(this); - if (!hasReturned) { - bc.addAload(var); - bc.addOpcode(ATHROW); - } - - addFinally(jsrHook.jsrList, finallyBlock); - } - - int pcEnd = bc.currentPc(); - patchGoto(gotoList, pcEnd); - hasReturned = !tryNotReturn; - if (finallyBlock != null) { - if (tryNotReturn) - finallyBlock.accept(this); - } - } - - /** - * Adds a finally clause for earch return statement. - */ - private void addFinally(ArrayList returnList, Stmnt finallyBlock) - throws CompileError - { - Bytecode bc = bytecode; - int n = returnList.size(); - for (int i = 0; i < n; ++i) { - final int[] ret = (int[])returnList.get(i); - int pc = ret[0]; - bc.write16bit(pc, bc.currentPc() - pc + 1); - ReturnHook hook = new JsrHook2(this, ret); - finallyBlock.accept(this); - hook.remove(this); - if (!hasReturned) { - bc.addOpcode(Opcode.GOTO); - bc.addIndex(pc + 3 - bc.currentPc()); - } - } - } - - public void atNewExpr(NewExpr expr) throws CompileError { - if (expr.isArray()) - atNewArrayExpr(expr); - else { - CtClass clazz = resolver.lookupClassByName(expr.getClassName()); - String cname = clazz.getName(); - ASTList args = expr.getArguments(); - bytecode.addNew(cname); - bytecode.addOpcode(DUP); - - atMethodCallCore(clazz, MethodInfo.nameInit, args, - false, true, -1, null); - - exprType = CLASS; - arrayDim = 0; - className = MemberResolver.javaToJvmName(cname); - } - } - - public void atNewArrayExpr(NewExpr expr) throws CompileError { - int type = expr.getArrayType(); - ASTList size = expr.getArraySize(); - ASTList classname = expr.getClassName(); - ArrayInit init = expr.getInitializer(); - if (size.length() > 1) { - if (init != null) - throw new CompileError( - "sorry, multi-dimensional array initializer " + - "for new is not supported"); - - atMultiNewArray(type, classname, size); - return; - } - - ASTree sizeExpr = size.head(); - atNewArrayExpr2(type, sizeExpr, Declarator.astToClassName(classname, '/'), init); - } - - private void atNewArrayExpr2(int type, ASTree sizeExpr, - String jvmClassname, ArrayInit init) throws CompileError { - if (init == null) - if (sizeExpr == null) - throw new CompileError("no array size"); - else - sizeExpr.accept(this); - else - if (sizeExpr == null) { - int s = init.length(); - bytecode.addIconst(s); - } - else - throw new CompileError("unnecessary array size specified for new"); - - String elementClass; - if (type == CLASS) { - elementClass = resolveClassName(jvmClassname); - bytecode.addAnewarray(MemberResolver.jvmToJavaName(elementClass)); - } - else { - elementClass = null; - int atype = 0; - switch (type) { - case BOOLEAN : - atype = T_BOOLEAN; - break; - case CHAR : - atype = T_CHAR; - break; - case FLOAT : - atype = T_FLOAT; - break; - case DOUBLE : - atype = T_DOUBLE; - break; - case BYTE : - atype = T_BYTE; - break; - case SHORT : - atype = T_SHORT; - break; - case INT : - atype = T_INT; - break; - case LONG : - atype = T_LONG; - break; - default : - badNewExpr(); - break; - } - - bytecode.addOpcode(NEWARRAY); - bytecode.add(atype); - } - - if (init != null) { - int s = init.length(); - ASTList list = init; - for (int i = 0; i < s; i++) { - bytecode.addOpcode(DUP); - bytecode.addIconst(i); - list.head().accept(this); - if (!isRefType(type)) - atNumCastExpr(exprType, type); - - bytecode.addOpcode(getArrayWriteOp(type, 0)); - list = list.tail(); - } - } - - exprType = type; - arrayDim = 1; - className = elementClass; - } - - private static void badNewExpr() throws CompileError { - throw new CompileError("bad new expression"); - } - - protected void atArrayVariableAssign(ArrayInit init, int varType, - int varArray, String varClass) throws CompileError { - atNewArrayExpr2(varType, null, varClass, init); - } - - public void atArrayInit(ArrayInit init) throws CompileError { - throw new CompileError("array initializer is not supported"); - } - - protected void atMultiNewArray(int type, ASTList classname, ASTList size) - throws CompileError - { - int count, dim; - dim = size.length(); - for (count = 0; size != null; size = size.tail()) { - ASTree s = size.head(); - if (s == null) - break; // int[][][] a = new int[3][4][]; - - ++count; - s.accept(this); - if (exprType != INT) - throw new CompileError("bad type for array size"); - } - - String desc; - exprType = type; - arrayDim = dim; - if (type == CLASS) { - className = resolveClassName(classname); - desc = toJvmArrayName(className, dim); - } - else - desc = toJvmTypeName(type, dim); - - bytecode.addMultiNewarray(desc, count); - } - - public void atCallExpr(CallExpr expr) throws CompileError { - String mname = null; - CtClass targetClass = null; - ASTree method = expr.oprand1(); - ASTList args = (ASTList)expr.oprand2(); - boolean isStatic = false; - boolean isSpecial = false; - int aload0pos = -1; - - MemberResolver.Method cached = expr.getMethod(); - if (method instanceof Member) { - mname = ((Member)method).get(); - targetClass = thisClass; - if (inStaticMethod || (cached != null && cached.isStatic())) - isStatic = true; // should be static - else { - aload0pos = bytecode.currentPc(); - bytecode.addAload(0); // this - } - } - else if (method instanceof Keyword) { // constructor - isSpecial = true; - mname = MethodInfo.nameInit; // - targetClass = thisClass; - if (inStaticMethod) - throw new CompileError("a constructor cannot be static"); - else - bytecode.addAload(0); // this - - if (((Keyword)method).get() == SUPER) - targetClass = MemberResolver.getSuperclass(targetClass); - } - else if (method instanceof Expr) { - Expr e = (Expr)method; - mname = ((Symbol)e.oprand2()).get(); - int op = e.getOperator(); - if (op == MEMBER) { // static method - targetClass - = resolver.lookupClass(((Symbol)e.oprand1()).get(), false); - isStatic = true; - } - else if (op == '.') { - ASTree target = e.oprand1(); - String classFollowedByDotSuper = TypeChecker.isDotSuper(target); - if (classFollowedByDotSuper != null) { - isSpecial = true; - targetClass = MemberResolver.getSuperInterface(thisClass, - classFollowedByDotSuper); - if (inStaticMethod || (cached != null && cached.isStatic())) - isStatic = true; // should be static - else { - aload0pos = bytecode.currentPc(); - bytecode.addAload(0); // this - } - } - else { - if (target instanceof Keyword) - if (((Keyword)target).get() == SUPER) - isSpecial = true; - - try { - target.accept(this); - } - catch (NoFieldException nfe) { - if (nfe.getExpr() != target) - throw nfe; - - // it should be a static method. - exprType = CLASS; - arrayDim = 0; - className = nfe.getField(); // JVM-internal - isStatic = true; - } - - if (arrayDim > 0) - targetClass = resolver.lookupClass(javaLangObject, true); - else if (exprType == CLASS /* && arrayDim == 0 */) - targetClass = resolver.lookupClassByJvmName(className); - else - badMethod(); - } - } - else - badMethod(); - } - else - fatal(); - - atMethodCallCore(targetClass, mname, args, isStatic, isSpecial, - aload0pos, cached); - } - - private static void badMethod() throws CompileError { - throw new CompileError("bad method"); - } - - /* - * atMethodCallCore() is also called by doit() in NewExpr.ProceedForNew - * - * @param targetClass the class at which method lookup starts. - * @param found not null if the method look has been already done. - */ - public void atMethodCallCore(CtClass targetClass, String mname, - ASTList args, boolean isStatic, boolean isSpecial, - int aload0pos, MemberResolver.Method found) - throws CompileError - { - int nargs = getMethodArgsLength(args); - int[] types = new int[nargs]; - int[] dims = new int[nargs]; - String[] cnames = new String[nargs]; - - if (!isStatic && found != null && found.isStatic()) { - bytecode.addOpcode(POP); - isStatic = true; - } - - int stack = bytecode.getStackDepth(); - - // generate code for evaluating arguments. - atMethodArgs(args, types, dims, cnames); - - if (found == null) - found = resolver.lookupMethod(targetClass, thisClass, thisMethod, - mname, types, dims, cnames); - - if (found == null) { - String msg; - if (mname.equals(MethodInfo.nameInit)) - msg = "constructor not found"; - else - msg = "Method " + mname + " not found in " - + targetClass.getName(); - - throw new CompileError(msg); - } - - atMethodCallCore2(targetClass, mname, isStatic, isSpecial, - aload0pos, found); - } - - private void atMethodCallCore2(CtClass targetClass, String mname, - boolean isStatic, boolean isSpecial, - int aload0pos, - MemberResolver.Method found) - throws CompileError - { - CtClass declClass = found.declaring; - MethodInfo minfo = found.info; - String desc = minfo.getDescriptor(); - int acc = minfo.getAccessFlags(); - - if (mname.equals(MethodInfo.nameInit)) { - isSpecial = true; - if (declClass != targetClass) - throw new CompileError("no such constructor: " + targetClass.getName()); - - if (declClass != thisClass && AccessFlag.isPrivate(acc)) { - desc = getAccessibleConstructor(desc, declClass, minfo); - bytecode.addOpcode(Opcode.ACONST_NULL); // the last parameter - } - } - else if (AccessFlag.isPrivate(acc)) - if (declClass == thisClass) - isSpecial = true; - else { - isSpecial = false; - isStatic = true; - String origDesc = desc; - if ((acc & AccessFlag.STATIC) == 0) - desc = Descriptor.insertParameter(declClass.getName(), - origDesc); - - acc = AccessFlag.setPackage(acc) | AccessFlag.STATIC; - mname = getAccessiblePrivate(mname, origDesc, desc, - minfo, declClass); - } - - boolean popTarget = false; - if ((acc & AccessFlag.STATIC) != 0) { - if (!isStatic) { - /* this method is static but the target object is - on stack. It must be popped out. If aload0pos >= 0, - then the target object was pushed by aload_0. It is - overwritten by NOP. - */ - isStatic = true; - if (aload0pos >= 0) - bytecode.write(aload0pos, NOP); - else - popTarget = true; - } - - bytecode.addInvokestatic(declClass, mname, desc); - } - else if (isSpecial) // if (isSpecial && notStatic(acc)) - bytecode.addInvokespecial(declClass, mname, desc); - else { - if (!Modifier.isPublic(declClass.getModifiers()) - || declClass.isInterface() != targetClass.isInterface()) - declClass = targetClass; - - if (declClass.isInterface()) { - int nargs = Descriptor.paramSize(desc) + 1; - bytecode.addInvokeinterface(declClass, mname, desc, nargs); - } - else - if (isStatic) - throw new CompileError(mname + " is not static"); - else - bytecode.addInvokevirtual(declClass, mname, desc); - } - - setReturnType(desc, isStatic, popTarget); - } - - /* - * Finds (or adds if necessary) a hidden accessor if the method - * is in an enclosing class. - * - * @param desc the descriptor of the method. - * @param declClass the class declaring the method. - */ - protected String getAccessiblePrivate(String methodName, String desc, - String newDesc, MethodInfo minfo, - CtClass declClass) - throws CompileError - { - if (isEnclosing(declClass, thisClass)) { - AccessorMaker maker = declClass.getAccessorMaker(); - if (maker != null) - return maker.getMethodAccessor(methodName, desc, newDesc, - minfo); - } - - throw new CompileError("Method " + methodName - + " is private"); - } - - /* - * Finds (or adds if necessary) a hidden constructor if the given - * constructor is in an enclosing class. - * - * @param desc the descriptor of the constructor. - * @param declClass the class declaring the constructor. - * @param minfo the method info of the constructor. - * @return the descriptor of the hidden constructor. - */ - protected String getAccessibleConstructor(String desc, CtClass declClass, - MethodInfo minfo) - throws CompileError - { - if (isEnclosing(declClass, thisClass)) { - AccessorMaker maker = declClass.getAccessorMaker(); - if (maker != null) - return maker.getConstructor(declClass, desc, minfo); - } - - throw new CompileError("the called constructor is private in " - + declClass.getName()); - } - - private boolean isEnclosing(CtClass outer, CtClass inner) { - try { - while (inner != null) { - inner = inner.getDeclaringClass(); - if (inner == outer) - return true; - } - } - catch (NotFoundException e) {} - return false; - } - - public int getMethodArgsLength(ASTList args) { - return ASTList.length(args); - } - - public void atMethodArgs(ASTList args, int[] types, int[] dims, - String[] cnames) throws CompileError { - int i = 0; - while (args != null) { - ASTree a = args.head(); - a.accept(this); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - args = args.tail(); - } - } - - void setReturnType(String desc, boolean isStatic, boolean popTarget) - throws CompileError - { - int i = desc.indexOf(')'); - if (i < 0) - badMethod(); - - char c = desc.charAt(++i); - int dim = 0; - while (c == '[') { - ++dim; - c = desc.charAt(++i); - } - - arrayDim = dim; - if (c == 'L') { - int j = desc.indexOf(';', i + 1); - if (j < 0) - badMethod(); - - exprType = CLASS; - className = desc.substring(i + 1, j); - } - else { - exprType = MemberResolver.descToType(c); - className = null; - } - - int etype = exprType; - if (isStatic) { - if (popTarget) { - if (is2word(etype, dim)) { - bytecode.addOpcode(DUP2_X1); - bytecode.addOpcode(POP2); - bytecode.addOpcode(POP); - } - else if (etype == VOID) - bytecode.addOpcode(POP); - else { - bytecode.addOpcode(SWAP); - bytecode.addOpcode(POP); - } - } - } - } - - protected void atFieldAssign(Expr expr, int op, ASTree left, - ASTree right, boolean doDup) throws CompileError - { - CtField f = fieldAccess(left, false); - boolean is_static = resultStatic; - if (op != '=' && !is_static) - bytecode.addOpcode(DUP); - - int fi; - if (op == '=') { - FieldInfo finfo = f.getFieldInfo2(); - setFieldType(finfo); - AccessorMaker maker = isAccessibleField(f, finfo); - if (maker == null) - fi = addFieldrefInfo(f, finfo); - else - fi = 0; - } - else - fi = atFieldRead(f, is_static); - - int fType = exprType; - int fDim = arrayDim; - String cname = className; - - atAssignCore(expr, op, right, fType, fDim, cname); - - boolean is2w = is2word(fType, fDim); - if (doDup) { - int dup_code; - if (is_static) - dup_code = (is2w ? DUP2 : DUP); - else - dup_code = (is2w ? DUP2_X1 : DUP_X1); - - bytecode.addOpcode(dup_code); - } - - atFieldAssignCore(f, is_static, fi, is2w); - - exprType = fType; - arrayDim = fDim; - className = cname; - } - - /* If fi == 0, the field must be a private field in an enclosing class. - */ - private void atFieldAssignCore(CtField f, boolean is_static, int fi, - boolean is2byte) throws CompileError { - if (fi != 0) { - if (is_static) { - bytecode.add(PUTSTATIC); - bytecode.growStack(is2byte ? -2 : -1); - } - else { - bytecode.add(PUTFIELD); - bytecode.growStack(is2byte ? -3 : -2); - } - - bytecode.addIndex(fi); - } - else { - CtClass declClass = f.getDeclaringClass(); - AccessorMaker maker = declClass.getAccessorMaker(); - // make should be non null. - FieldInfo finfo = f.getFieldInfo2(); - MethodInfo minfo = maker.getFieldSetter(finfo, is_static); - bytecode.addInvokestatic(declClass, minfo.getName(), - minfo.getDescriptor()); - } - } - - /* overwritten in JvstCodeGen. - */ - public void atMember(Member mem) throws CompileError { - atFieldRead(mem); - } - - protected void atFieldRead(ASTree expr) throws CompileError - { - CtField f = fieldAccess(expr, true); - if (f == null) { - atArrayLength(expr); - return; - } - - boolean is_static = resultStatic; - ASTree cexpr = TypeChecker.getConstantFieldValue(f); - if (cexpr == null) - atFieldRead(f, is_static); - else { - cexpr.accept(this); - setFieldType(f.getFieldInfo2()); - } - } - - private void atArrayLength(ASTree expr) throws CompileError { - if (arrayDim == 0) - throw new CompileError(".length applied to a non array"); - - bytecode.addOpcode(ARRAYLENGTH); - exprType = INT; - arrayDim = 0; - } - - /** - * Generates bytecode for reading a field value. - * It returns a fieldref_info index or zero if the field is a private - * one declared in an enclosing class. - */ - private int atFieldRead(CtField f, boolean isStatic) throws CompileError { - FieldInfo finfo = f.getFieldInfo2(); - boolean is2byte = setFieldType(finfo); - AccessorMaker maker = isAccessibleField(f, finfo); - if (maker != null) { - MethodInfo minfo = maker.getFieldGetter(finfo, isStatic); - bytecode.addInvokestatic(f.getDeclaringClass(), minfo.getName(), - minfo.getDescriptor()); - return 0; - } - else { - int fi = addFieldrefInfo(f, finfo); - if (isStatic) { - bytecode.add(GETSTATIC); - bytecode.growStack(is2byte ? 2 : 1); - } - else { - bytecode.add(GETFIELD); - bytecode.growStack(is2byte ? 1 : 0); - } - - bytecode.addIndex(fi); - return fi; - } - } - - /** - * Returns null if the field is accessible. Otherwise, it throws - * an exception or it returns AccessorMaker if the field is a private - * one declared in an enclosing class. - */ - private AccessorMaker isAccessibleField(CtField f, FieldInfo finfo) - throws CompileError - { - if (AccessFlag.isPrivate(finfo.getAccessFlags()) - && f.getDeclaringClass() != thisClass) { - CtClass declClass = f.getDeclaringClass(); - if (isEnclosing(declClass, thisClass)) { - AccessorMaker maker = declClass.getAccessorMaker(); - if (maker != null) - return maker; - else - throw new CompileError("fatal error. bug?"); - } - else - throw new CompileError("Field " + f.getName() + " in " - + declClass.getName() + " is private."); - } - - return null; // accessible field - } - - /** - * Sets exprType, arrayDim, and className. - * - * @return true if the field type is long or double. - */ - private boolean setFieldType(FieldInfo finfo) throws CompileError { - String type = finfo.getDescriptor(); - - int i = 0; - int dim = 0; - char c = type.charAt(i); - while (c == '[') { - ++dim; - c = type.charAt(++i); - } - - arrayDim = dim; - exprType = MemberResolver.descToType(c); - - if (c == 'L') - className = type.substring(i + 1, type.indexOf(';', i + 1)); - else - className = null; - - boolean is2byte = dim == 0 && (c == 'J' || c == 'D'); - return is2byte; - } - - private int addFieldrefInfo(CtField f, FieldInfo finfo) { - ConstPool cp = bytecode.getConstPool(); - String cname = f.getDeclaringClass().getName(); - int ci = cp.addClassInfo(cname); - String name = finfo.getName(); - String type = finfo.getDescriptor(); - return cp.addFieldrefInfo(ci, name, type); - } - - protected void atClassObject2(String cname) throws CompileError { - if (getMajorVersion() < ClassFile.JAVA_5) - super.atClassObject2(cname); - else - bytecode.addLdc(bytecode.getConstPool().addClassInfo(cname)); - } - - protected void atFieldPlusPlus(int token, boolean isPost, - ASTree oprand, Expr expr, boolean doDup) - throws CompileError - { - CtField f = fieldAccess(oprand, false); - boolean is_static = resultStatic; - if (!is_static) - bytecode.addOpcode(DUP); - - int fi = atFieldRead(f, is_static); - int t = exprType; - boolean is2w = is2word(t, arrayDim); - - int dup_code; - if (is_static) - dup_code = (is2w ? DUP2 : DUP); - else - dup_code = (is2w ? DUP2_X1 : DUP_X1); - - atPlusPlusCore(dup_code, doDup, token, isPost, expr); - atFieldAssignCore(f, is_static, fi, is2w); - } - - /* This method also returns a value in resultStatic. - * - * @param acceptLength true if array length is acceptable - */ - protected CtField fieldAccess(ASTree expr, boolean acceptLength) - throws CompileError - { - if (expr instanceof Member) { - String name = ((Member)expr).get(); - CtField f = null; - try { - f = thisClass.getField(name); - } - catch (NotFoundException e) { - // EXPR might be part of a static member access? - throw new NoFieldException(name, expr); - } - - boolean is_static = Modifier.isStatic(f.getModifiers()); - if (!is_static) - if (inStaticMethod) - throw new CompileError( - "not available in a static method: " + name); - else - bytecode.addAload(0); // this - - resultStatic = is_static; - return f; - } - else if (expr instanceof Expr) { - Expr e = (Expr)expr; - int op = e.getOperator(); - if (op == MEMBER) { - /* static member by # (extension by Javassist) - * For example, if int.class is parsed, the resulting tree - * is (# "java.lang.Integer" "TYPE"). - */ - CtField f = resolver.lookupField(((Symbol)e.oprand1()).get(), - (Symbol)e.oprand2()); - resultStatic = true; - return f; - } - else if (op == '.') { - CtField f = null; - try { - e.oprand1().accept(this); - /* Don't call lookupFieldByJvmName2(). - * The left operand of . is not a class name but - * a normal expression. - */ - if (exprType == CLASS && arrayDim == 0) - f = resolver.lookupFieldByJvmName(className, - (Symbol)e.oprand2()); - else if (acceptLength && arrayDim > 0 - && ((Symbol)e.oprand2()).get().equals("length")) - return null; // expr is an array length. - else - badLvalue(); - - boolean is_static = Modifier.isStatic(f.getModifiers()); - if (is_static) - bytecode.addOpcode(POP); - - resultStatic = is_static; - return f; - } - catch (NoFieldException nfe) { - if (nfe.getExpr() != e.oprand1()) - throw nfe; - - /* EXPR should be a static field. - * If EXPR might be part of a qualified class name, - * lookupFieldByJvmName2() throws NoFieldException. - */ - Symbol fname = (Symbol)e.oprand2(); - String cname = nfe.getField(); - f = resolver.lookupFieldByJvmName2(cname, fname, expr); - resultStatic = true; - return f; - } - } - else - badLvalue(); - } - else - badLvalue(); - - resultStatic = false; - return null; // never reach - } - - private static void badLvalue() throws CompileError { - throw new CompileError("bad l-value"); - } - - public CtClass[] makeParamList(MethodDecl md) throws CompileError { - CtClass[] params; - ASTList plist = md.getParams(); - if (plist == null) - params = new CtClass[0]; - else { - int i = 0; - params = new CtClass[plist.length()]; - while (plist != null) { - params[i++] = resolver.lookupClass((Declarator)plist.head()); - plist = plist.tail(); - } - } - - return params; - } - - public CtClass[] makeThrowsList(MethodDecl md) throws CompileError { - CtClass[] clist; - ASTList list = md.getThrows(); - if (list == null) - return null; - else { - int i = 0; - clist = new CtClass[list.length()]; - while (list != null) { - clist[i++] = resolver.lookupClassByName((ASTList)list.head()); - list = list.tail(); - } - - return clist; - } - } - - /* Converts a class name into a JVM-internal representation. - * - * It may also expand a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected String resolveClassName(ASTList name) throws CompileError { - return resolver.resolveClassName(name); - } - - /* Expands a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected String resolveClassName(String jvmName) throws CompileError { - return resolver.resolveJvmClassName(jvmName); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/MemberResolver.java b/src/com/wenshuo/agent/javassist/compiler/MemberResolver.java deleted file mode 100644 index 933a626..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/MemberResolver.java +++ /dev/null @@ -1,617 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import java.util.Hashtable; -import java.lang.ref.WeakReference; -import java.util.WeakHashMap; -import java.util.List; -import java.util.Iterator; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.ast.*; - -/* Code generator methods depending on javassist.* classes. - */ -public class MemberResolver implements TokenId { - private ClassPool classPool; - - public MemberResolver(ClassPool cp) { - classPool = cp; - } - - public ClassPool getClassPool() { return classPool; } - - private static void fatal() throws CompileError { - throw new CompileError("fatal"); - } - - public static class Method { - public CtClass declaring; - public MethodInfo info; - public int notmatch; - - public Method(CtClass c, MethodInfo i, int n) { - declaring = c; - info = i; - notmatch = n; - } - - /** - * Returns true if the invoked method is static. - */ - public boolean isStatic() { - int acc = info.getAccessFlags(); - return (acc & AccessFlag.STATIC) != 0; - } - } - - public Method lookupMethod(CtClass clazz, CtClass currentClass, MethodInfo current, - String methodName, - int[] argTypes, int[] argDims, - String[] argClassNames) - throws CompileError - { - Method maybe = null; - // to enable the creation of a recursively called method - if (current != null && clazz == currentClass) - if (current.getName().equals(methodName)) { - int res = compareSignature(current.getDescriptor(), - argTypes, argDims, argClassNames); - if (res != NO) { - Method r = new Method(clazz, current, res); - if (res == YES) - return r; - else - maybe = r; - } - } - - Method m = lookupMethod(clazz, methodName, argTypes, argDims, - argClassNames, maybe != null); - if (m != null) - return m; - else - return maybe; - } - - private Method lookupMethod(CtClass clazz, String methodName, - int[] argTypes, int[] argDims, - String[] argClassNames, boolean onlyExact) - throws CompileError - { - Method maybe = null; - ClassFile cf = clazz.getClassFile2(); - // If the class is an array type, the class file is null. - // If so, search the super class java.lang.Object for clone() etc. - if (cf != null) { - List list = cf.getMethods(); - int n = list.size(); - for (int i = 0; i < n; ++i) { - MethodInfo minfo = (MethodInfo)list.get(i); - if (minfo.getName().equals(methodName)) { - int res = compareSignature(minfo.getDescriptor(), - argTypes, argDims, argClassNames); - if (res != NO) { - Method r = new Method(clazz, minfo, res); - if (res == YES) - return r; - else if (maybe == null || maybe.notmatch > res) - maybe = r; - } - } - } - } - - if (onlyExact) - maybe = null; - else - onlyExact = maybe != null; - - int mod = clazz.getModifiers(); - boolean isIntf = Modifier.isInterface(mod); - try { - // skip searching java.lang.Object if clazz is an interface type. - if (!isIntf) { - CtClass pclazz = clazz.getSuperclass(); - if (pclazz != null) { - Method r = lookupMethod(pclazz, methodName, argTypes, - argDims, argClassNames, onlyExact); - if (r != null) - return r; - } - } - } - catch (NotFoundException e) {} - - try { - CtClass[] ifs = clazz.getInterfaces(); - int size = ifs.length; - for (int i = 0; i < size; ++i) { - Method r = lookupMethod(ifs[i], methodName, - argTypes, argDims, argClassNames, - onlyExact); - if (r != null) - return r; - } - - if (isIntf) { - // finally search java.lang.Object. - CtClass pclazz = clazz.getSuperclass(); - if (pclazz != null) { - Method r = lookupMethod(pclazz, methodName, argTypes, - argDims, argClassNames, onlyExact); - if (r != null) - return r; - } - } - } - catch (NotFoundException e) {} - - return maybe; - } - - private static final int YES = 0; - private static final int NO = -1; - - /* - * Returns YES if actual parameter types matches the given signature. - * - * argTypes, argDims, and argClassNames represent actual parameters. - * - * This method does not correctly implement the Java method dispatch - * algorithm. - * - * If some of the parameter types exactly match but others are subtypes of - * the corresponding type in the signature, this method returns the number - * of parameter types that do not exactly match. - */ - private int compareSignature(String desc, int[] argTypes, - int[] argDims, String[] argClassNames) - throws CompileError - { - int result = YES; - int i = 1; - int nArgs = argTypes.length; - if (nArgs != Descriptor.numOfParameters(desc)) - return NO; - - int len = desc.length(); - for (int n = 0; i < len; ++n) { - char c = desc.charAt(i++); - if (c == ')') - return (n == nArgs ? result : NO); - else if (n >= nArgs) - return NO; - - int dim = 0; - while (c == '[') { - ++dim; - c = desc.charAt(i++); - } - - if (argTypes[n] == NULL) { - if (dim == 0 && c != 'L') - return NO; - - if (c == 'L') - i = desc.indexOf(';', i) + 1; - } - else if (argDims[n] != dim) { - if (!(dim == 0 && c == 'L' - && desc.startsWith("java/lang/Object;", i))) - return NO; - - // if the thread reaches here, c must be 'L'. - i = desc.indexOf(';', i) + 1; - result++; - if (i <= 0) - return NO; // invalid descriptor? - } - else if (c == 'L') { // not compare - int j = desc.indexOf(';', i); - if (j < 0 || argTypes[n] != CLASS) - return NO; - - String cname = desc.substring(i, j); - if (!cname.equals(argClassNames[n])) { - CtClass clazz = lookupClassByJvmName(argClassNames[n]); - try { - if (clazz.subtypeOf(lookupClassByJvmName(cname))) - result++; - else - return NO; - } - catch (NotFoundException e) { - result++; // should be NO? - } - } - - i = j + 1; - } - else { - int t = descToType(c); - int at = argTypes[n]; - if (t != at) - if (t == INT - && (at == SHORT || at == BYTE || at == CHAR)) - result++; - else - return NO; - } - } - - return NO; - } - - /** - * Only used by fieldAccess() in MemberCodeGen and TypeChecker. - * - * @param jvmClassName a JVM class name. e.g. java/lang/String - * @see #lookupClass(String, boolean) - */ - public CtField lookupFieldByJvmName2(String jvmClassName, Symbol fieldSym, - ASTree expr) throws NoFieldException - { - String field = fieldSym.get(); - CtClass cc = null; - try { - cc = lookupClass(jvmToJavaName(jvmClassName), true); - } - catch (CompileError e) { - // EXPR might be part of a qualified class name. - throw new NoFieldException(jvmClassName + "/" + field, expr); - } - - try { - return cc.getField(field); - } - catch (NotFoundException e) { - // maybe an inner class. - jvmClassName = javaToJvmName(cc.getName()); - throw new NoFieldException(jvmClassName + "$" + field, expr); - } - } - - /** - * @param jvmClassName a JVM class name. e.g. java/lang/String - */ - public CtField lookupFieldByJvmName(String jvmClassName, Symbol fieldName) - throws CompileError - { - return lookupField(jvmToJavaName(jvmClassName), fieldName); - } - - /** - * @param className a qualified class name. e.g. java.lang.String - */ - public CtField lookupField(String className, Symbol fieldName) - throws CompileError - { - CtClass cc = lookupClass(className, false); - try { - return cc.getField(fieldName.get()); - } - catch (NotFoundException e) {} - throw new CompileError("no such field: " + fieldName.get()); - } - - public CtClass lookupClassByName(ASTList name) throws CompileError { - return lookupClass(Declarator.astToClassName(name, '.'), false); - } - - public CtClass lookupClassByJvmName(String jvmName) throws CompileError { - return lookupClass(jvmToJavaName(jvmName), false); - } - - public CtClass lookupClass(Declarator decl) throws CompileError { - return lookupClass(decl.getType(), decl.getArrayDim(), - decl.getClassName()); - } - - /** - * @param classname jvm class name. - */ - public CtClass lookupClass(int type, int dim, String classname) - throws CompileError - { - String cname = ""; - CtClass clazz; - if (type == CLASS) { - clazz = lookupClassByJvmName(classname); - if (dim > 0) - cname = clazz.getName(); - else - return clazz; - } - else - cname = getTypeName(type); - - while (dim-- > 0) - cname += "[]"; - - return lookupClass(cname, false); - } - - /* - * type cannot be CLASS - */ - static String getTypeName(int type) throws CompileError { - String cname = ""; - switch (type) { - case BOOLEAN : - cname = "boolean"; - break; - case CHAR : - cname = "char"; - break; - case BYTE : - cname = "byte"; - break; - case SHORT : - cname = "short"; - break; - case INT : - cname = "int"; - break; - case LONG : - cname = "long"; - break; - case FLOAT : - cname = "float"; - break; - case DOUBLE : - cname = "double"; - break; - case VOID : - cname = "void"; - break; - default : - fatal(); - } - - return cname; - } - - /** - * @param name a qualified class name. e.g. java.lang.String - */ - public CtClass lookupClass(String name, boolean notCheckInner) - throws CompileError - { - Hashtable cache = getInvalidNames(); - Object found = cache.get(name); - if (found == INVALID) - throw new CompileError("no such class: " + name); - else if (found != null) - try { - return classPool.get((String)found); - } - catch (NotFoundException e) {} - - CtClass cc = null; - try { - cc = lookupClass0(name, notCheckInner); - } - catch (NotFoundException e) { - cc = searchImports(name); - } - - cache.put(name, cc.getName()); - return cc; - } - - private static final String INVALID = ""; - private static WeakHashMap invalidNamesMap = new WeakHashMap(); - private Hashtable invalidNames = null; - - // for unit tests - public static int getInvalidMapSize() { return invalidNamesMap.size(); } - - private Hashtable getInvalidNames() { - Hashtable ht = invalidNames; - if (ht == null) { - synchronized (MemberResolver.class) { - WeakReference ref = (WeakReference)invalidNamesMap.get(classPool); - if (ref != null) - ht = (Hashtable)ref.get(); - - if (ht == null) { - ht = new Hashtable(); - invalidNamesMap.put(classPool, new WeakReference(ht)); - } - } - - invalidNames = ht; - } - - return ht; - } - - private CtClass searchImports(String orgName) - throws CompileError - { - if (orgName.indexOf('.') < 0) { - Iterator it = classPool.getImportedPackages(); - while (it.hasNext()) { - String pac = (String)it.next(); - String fqName = pac + '.' + orgName; - try { - return classPool.get(fqName); - } - catch (NotFoundException e) { - try { - if (pac.endsWith("." + orgName)) - return classPool.get(pac); - } - catch (NotFoundException e2) {} - } - } - } - - getInvalidNames().put(orgName, INVALID); - throw new CompileError("no such class: " + orgName); - } - - private CtClass lookupClass0(String classname, boolean notCheckInner) - throws NotFoundException - { - CtClass cc = null; - do { - try { - cc = classPool.get(classname); - } - catch (NotFoundException e) { - int i = classname.lastIndexOf('.'); - if (notCheckInner || i < 0) - throw e; - else { - StringBuffer sbuf = new StringBuffer(classname); - sbuf.setCharAt(i, '$'); - classname = sbuf.toString(); - } - } - } while (cc == null); - return cc; - } - - /* Converts a class name into a JVM-internal representation. - * - * It may also expand a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - public String resolveClassName(ASTList name) throws CompileError { - if (name == null) - return null; - else - return javaToJvmName(lookupClassByName(name).getName()); - } - - /* Expands a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - public String resolveJvmClassName(String jvmName) throws CompileError { - if (jvmName == null) - return null; - else - return javaToJvmName(lookupClassByJvmName(jvmName).getName()); - } - - public static CtClass getSuperclass(CtClass c) throws CompileError { - try { - CtClass sc = c.getSuperclass(); - if (sc != null) - return sc; - } - catch (NotFoundException e) {} - throw new CompileError("cannot find the super class of " - + c.getName()); - } - - public static CtClass getSuperInterface(CtClass c, String interfaceName) - throws CompileError - { - try { - CtClass[] intfs = c.getInterfaces(); - for (int i = 0; i < intfs.length; i++) - if (intfs[i].getName().equals(interfaceName)) - return intfs[i]; - } catch (NotFoundException e) {} - throw new CompileError("cannot find the super inetrface " + interfaceName - + " of " + c.getName()); - } - - public static String javaToJvmName(String classname) { - return classname.replace('.', '/'); - } - - public static String jvmToJavaName(String classname) { - return classname.replace('/', '.'); - } - - public static int descToType(char c) throws CompileError { - switch (c) { - case 'Z' : - return BOOLEAN; - case 'C' : - return CHAR; - case 'B' : - return BYTE; - case 'S' : - return SHORT; - case 'I' : - return INT; - case 'J' : - return LONG; - case 'F' : - return FLOAT; - case 'D' : - return DOUBLE; - case 'V' : - return VOID; - case 'L' : - case '[' : - return CLASS; - default : - fatal(); - return VOID; // never reach here - } - } - - public static int getModifiers(ASTList mods) { - int m = 0; - while (mods != null) { - Keyword k = (Keyword)mods.head(); - mods = mods.tail(); - switch (k.get()) { - case STATIC : - m |= Modifier.STATIC; - break; - case FINAL : - m |= Modifier.FINAL; - break; - case SYNCHRONIZED : - m |= Modifier.SYNCHRONIZED; - break; - case ABSTRACT : - m |= Modifier.ABSTRACT; - break; - case PUBLIC : - m |= Modifier.PUBLIC; - break; - case PROTECTED : - m |= Modifier.PROTECTED; - break; - case PRIVATE : - m |= Modifier.PRIVATE; - break; - case VOLATILE : - m |= Modifier.VOLATILE; - break; - case TRANSIENT : - m |= Modifier.TRANSIENT; - break; - case STRICT : - m |= Modifier.STRICT; - break; - } - } - - return m; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/NoFieldException.java b/src/com/wenshuo/agent/javassist/compiler/NoFieldException.java deleted file mode 100644 index 5b35107..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/NoFieldException.java +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.compiler.ast.ASTree; - -public class NoFieldException extends CompileError { - private String fieldName; - private ASTree expr; - - /* NAME must be JVM-internal representation. - */ - public NoFieldException(String name, ASTree e) { - super("no such field: " + name); - fieldName = name; - expr = e; - } - - /* The returned name should be JVM-internal representation. - */ - public String getField() { return fieldName; } - - /* Returns the expression where this exception is thrown. - */ - public ASTree getExpr() { return expr; } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/Parser.java b/src/com/wenshuo/agent/javassist/compiler/Parser.java deleted file mode 100644 index 4e15650..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/Parser.java +++ /dev/null @@ -1,1345 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.compiler.ast.*; - -public final class Parser implements TokenId { - private Lex lex; - - public Parser(Lex lex) { - this.lex = lex; - } - - public boolean hasMore() { return lex.lookAhead() >= 0; } - - /* member.declaration - * : method.declaration | field.declaration - */ - public ASTList parseMember(SymbolTable tbl) throws CompileError { - ASTList mem = parseMember1(tbl); - if (mem instanceof MethodDecl) - return parseMethod2(tbl, (MethodDecl)mem); - else - return mem; - } - - /* A method body is not parsed. - */ - public ASTList parseMember1(SymbolTable tbl) throws CompileError { - ASTList mods = parseMemberMods(); - Declarator d; - boolean isConstructor = false; - if (lex.lookAhead() == Identifier && lex.lookAhead(1) == '(') { - d = new Declarator(VOID, 0); - isConstructor = true; - } - else - d = parseFormalType(tbl); - - if (lex.get() != Identifier) - throw new SyntaxError(lex); - - String name; - if (isConstructor) - name = MethodDecl.initName; - else - name = lex.getString(); - - d.setVariable(new Symbol(name)); - if (isConstructor || lex.lookAhead() == '(') - return parseMethod1(tbl, isConstructor, mods, d); - else - return parseField(tbl, mods, d); - } - - /* field.declaration - * : member.modifiers - * formal.type Identifier - * [ "=" expression ] ";" - */ - private FieldDecl parseField(SymbolTable tbl, ASTList mods, - Declarator d) throws CompileError - { - ASTree expr = null; - if (lex.lookAhead() == '=') { - lex.get(); - expr = parseExpression(tbl); - } - - int c = lex.get(); - if (c == ';') - return new FieldDecl(mods, new ASTList(d, new ASTList(expr))); - else if (c == ',') - throw new CompileError( - "only one field can be declared in one declaration", lex); - else - throw new SyntaxError(lex); - } - - /* method.declaration - * : member.modifiers - * [ formal.type ] - * Identifier "(" [ formal.parameter ( "," formal.parameter )* ] ")" - * array.dimension - * [ THROWS class.type ( "," class.type ) ] - * ( block.statement | ";" ) - * - * Note that a method body is not parsed. - */ - private MethodDecl parseMethod1(SymbolTable tbl, boolean isConstructor, - ASTList mods, Declarator d) - throws CompileError - { - if (lex.get() != '(') - throw new SyntaxError(lex); - - ASTList parms = null; - if (lex.lookAhead() != ')') - while (true) { - parms = ASTList.append(parms, parseFormalParam(tbl)); - int t = lex.lookAhead(); - if (t == ',') - lex.get(); - else if (t == ')') - break; - } - - lex.get(); // ')' - d.addArrayDim(parseArrayDimension()); - if (isConstructor && d.getArrayDim() > 0) - throw new SyntaxError(lex); - - ASTList throwsList = null; - if (lex.lookAhead() == THROWS) { - lex.get(); - while (true) { - throwsList = ASTList.append(throwsList, parseClassType(tbl)); - if (lex.lookAhead() == ',') - lex.get(); - else - break; - } - } - - return new MethodDecl(mods, new ASTList(d, - ASTList.make(parms, throwsList, null))); - } - - /* Parses a method body. - */ - public MethodDecl parseMethod2(SymbolTable tbl, MethodDecl md) - throws CompileError - { - Stmnt body = null; - if (lex.lookAhead() == ';') - lex.get(); - else { - body = parseBlock(tbl); - if (body == null) - body = new Stmnt(BLOCK); - } - - md.sublist(4).setHead(body); - return md; - } - - /* member.modifiers - * : ( FINAL | SYNCHRONIZED | ABSTRACT - * | PUBLIC | PROTECTED | PRIVATE | STATIC - * | VOLATILE | TRANSIENT | STRICT )* - */ - private ASTList parseMemberMods() { - int t; - ASTList list = null; - while (true) { - t = lex.lookAhead(); - if (t == ABSTRACT || t == FINAL || t == PUBLIC || t == PROTECTED - || t == PRIVATE || t == SYNCHRONIZED || t == STATIC - || t == VOLATILE || t == TRANSIENT || t == STRICT) - list = new ASTList(new Keyword(lex.get()), list); - else - break; - } - - return list; - } - - /* formal.type : ( build-in-type | class.type ) array.dimension - */ - private Declarator parseFormalType(SymbolTable tbl) throws CompileError { - int t = lex.lookAhead(); - if (isBuiltinType(t) || t == VOID) { - lex.get(); // primitive type - int dim = parseArrayDimension(); - return new Declarator(t, dim); - } - else { - ASTList name = parseClassType(tbl); - int dim = parseArrayDimension(); - return new Declarator(name, dim); - } - } - - private static boolean isBuiltinType(int t) { - return (t == BOOLEAN || t == BYTE || t == CHAR || t == SHORT - || t == INT || t == LONG || t == FLOAT || t == DOUBLE); - } - - /* formal.parameter : formal.type Identifier array.dimension - */ - private Declarator parseFormalParam(SymbolTable tbl) - throws CompileError - { - Declarator d = parseFormalType(tbl); - if (lex.get() != Identifier) - throw new SyntaxError(lex); - - String name = lex.getString(); - d.setVariable(new Symbol(name)); - d.addArrayDim(parseArrayDimension()); - tbl.append(name, d); - return d; - } - - /* statement : [ label ":" ]* labeled.statement - * - * labeled.statement - * : block.statement - * | if.statement - * | while.statement - * | do.statement - * | for.statement - * | switch.statement - * | try.statement - * | return.statement - * | thorw.statement - * | break.statement - * | continue.statement - * | declaration.or.expression - * | ";" - * - * This method may return null (empty statement). - */ - public Stmnt parseStatement(SymbolTable tbl) - throws CompileError - { - int t = lex.lookAhead(); - if (t == '{') - return parseBlock(tbl); - else if (t == ';') { - lex.get(); - return new Stmnt(BLOCK); // empty statement - } - else if (t == Identifier && lex.lookAhead(1) == ':') { - lex.get(); // Identifier - String label = lex.getString(); - lex.get(); // ':' - return Stmnt.make(LABEL, new Symbol(label), parseStatement(tbl)); - } - else if (t == IF) - return parseIf(tbl); - else if (t == WHILE) - return parseWhile(tbl); - else if (t == DO) - return parseDo(tbl); - else if (t == FOR) - return parseFor(tbl); - else if (t == TRY) - return parseTry(tbl); - else if (t == SWITCH) - return parseSwitch(tbl); - else if (t == SYNCHRONIZED) - return parseSynchronized(tbl); - else if (t == RETURN) - return parseReturn(tbl); - else if (t == THROW) - return parseThrow(tbl); - else if (t == BREAK) - return parseBreak(tbl); - else if (t == CONTINUE) - return parseContinue(tbl); - else - return parseDeclarationOrExpression(tbl, false); - } - - /* block.statement : "{" statement* "}" - */ - private Stmnt parseBlock(SymbolTable tbl) throws CompileError { - if (lex.get() != '{') - throw new SyntaxError(lex); - - Stmnt body = null; - SymbolTable tbl2 = new SymbolTable(tbl); - while (lex.lookAhead() != '}') { - Stmnt s = parseStatement(tbl2); - if (s != null) - body = (Stmnt)ASTList.concat(body, new Stmnt(BLOCK, s)); - } - - lex.get(); // '}' - if (body == null) - return new Stmnt(BLOCK); // empty block - else - return body; - } - - /* if.statement : IF "(" expression ")" statement - * [ ELSE statement ] - */ - private Stmnt parseIf(SymbolTable tbl) throws CompileError { - int t = lex.get(); // IF - ASTree expr = parseParExpression(tbl); - Stmnt thenp = parseStatement(tbl); - Stmnt elsep; - if (lex.lookAhead() == ELSE) { - lex.get(); - elsep = parseStatement(tbl); - } - else - elsep = null; - - return new Stmnt(t, expr, new ASTList(thenp, new ASTList(elsep))); - } - - /* while.statement : WHILE "(" expression ")" statement - */ - private Stmnt parseWhile(SymbolTable tbl) - throws CompileError - { - int t = lex.get(); // WHILE - ASTree expr = parseParExpression(tbl); - Stmnt body = parseStatement(tbl); - return new Stmnt(t, expr, body); - } - - /* do.statement : DO statement WHILE "(" expression ")" ";" - */ - private Stmnt parseDo(SymbolTable tbl) throws CompileError { - int t = lex.get(); // DO - Stmnt body = parseStatement(tbl); - if (lex.get() != WHILE || lex.get() != '(') - throw new SyntaxError(lex); - - ASTree expr = parseExpression(tbl); - if (lex.get() != ')' || lex.get() != ';') - throw new SyntaxError(lex); - - return new Stmnt(t, expr, body); - } - - /* for.statement : FOR "(" decl.or.expr expression ";" expression ")" - * statement - */ - private Stmnt parseFor(SymbolTable tbl) throws CompileError { - Stmnt expr1, expr3; - ASTree expr2; - int t = lex.get(); // FOR - - SymbolTable tbl2 = new SymbolTable(tbl); - - if (lex.get() != '(') - throw new SyntaxError(lex); - - if (lex.lookAhead() == ';') { - lex.get(); - expr1 = null; - } - else - expr1 = parseDeclarationOrExpression(tbl2, true); - - if (lex.lookAhead() == ';') - expr2 = null; - else - expr2 = parseExpression(tbl2); - - if (lex.get() != ';') - throw new CompileError("; is missing", lex); - - if (lex.lookAhead() == ')') - expr3 = null; - else - expr3 = parseExprList(tbl2); - - if (lex.get() != ')') - throw new CompileError(") is missing", lex); - - Stmnt body = parseStatement(tbl2); - return new Stmnt(t, expr1, new ASTList(expr2, - new ASTList(expr3, body))); - } - - /* switch.statement : SWITCH "(" expression ")" "{" switch.block "}" - * - * swtich.block : ( switch.label statement* )* - * - * swtich.label : DEFAULT ":" - * | CASE const.expression ":" - */ - private Stmnt parseSwitch(SymbolTable tbl) throws CompileError { - int t = lex.get(); // SWITCH - ASTree expr = parseParExpression(tbl); - Stmnt body = parseSwitchBlock(tbl); - return new Stmnt(t, expr, body); - } - - private Stmnt parseSwitchBlock(SymbolTable tbl) throws CompileError { - if (lex.get() != '{') - throw new SyntaxError(lex); - - SymbolTable tbl2 = new SymbolTable(tbl); - Stmnt s = parseStmntOrCase(tbl2); - if (s == null) - throw new CompileError("empty switch block", lex); - - int op = s.getOperator(); - if (op != CASE && op != DEFAULT) - throw new CompileError("no case or default in a switch block", - lex); - - Stmnt body = new Stmnt(BLOCK, s); - while (lex.lookAhead() != '}') { - Stmnt s2 = parseStmntOrCase(tbl2); - if (s2 != null) { - int op2 = s2.getOperator(); - if (op2 == CASE || op2 == DEFAULT) { - body = (Stmnt)ASTList.concat(body, new Stmnt(BLOCK, s2)); - s = s2; - } - else - s = (Stmnt)ASTList.concat(s, new Stmnt(BLOCK, s2)); - } - } - - lex.get(); // '}' - return body; - } - - private Stmnt parseStmntOrCase(SymbolTable tbl) throws CompileError { - int t = lex.lookAhead(); - if (t != CASE && t != DEFAULT) - return parseStatement(tbl); - - lex.get(); - Stmnt s; - if (t == CASE) - s = new Stmnt(t, parseExpression(tbl)); - else - s = new Stmnt(DEFAULT); - - if (lex.get() != ':') - throw new CompileError(": is missing", lex); - - return s; - } - - /* synchronized.statement : - * SYNCHRONIZED "(" expression ")" block.statement - */ - private Stmnt parseSynchronized(SymbolTable tbl) throws CompileError { - int t = lex.get(); // SYNCHRONIZED - if (lex.get() != '(') - throw new SyntaxError(lex); - - ASTree expr = parseExpression(tbl); - if (lex.get() != ')') - throw new SyntaxError(lex); - - Stmnt body = parseBlock(tbl); - return new Stmnt(t, expr, body); - } - - /* try.statement - * : TRY block.statement - * [ CATCH "(" class.type Identifier ")" block.statement ]* - * [ FINALLY block.statement ]* - */ - private Stmnt parseTry(SymbolTable tbl) throws CompileError { - lex.get(); // TRY - Stmnt block = parseBlock(tbl); - ASTList catchList = null; - while (lex.lookAhead() == CATCH) { - lex.get(); // CATCH - if (lex.get() != '(') - throw new SyntaxError(lex); - - SymbolTable tbl2 = new SymbolTable(tbl); - Declarator d = parseFormalParam(tbl2); - if (d.getArrayDim() > 0 || d.getType() != CLASS) - throw new SyntaxError(lex); - - if (lex.get() != ')') - throw new SyntaxError(lex); - - Stmnt b = parseBlock(tbl2); - catchList = ASTList.append(catchList, new Pair(d, b)); - } - - Stmnt finallyBlock = null; - if (lex.lookAhead() == FINALLY) { - lex.get(); // FINALLY - finallyBlock = parseBlock(tbl); - } - - return Stmnt.make(TRY, block, catchList, finallyBlock); - } - - /* return.statement : RETURN [ expression ] ";" - */ - private Stmnt parseReturn(SymbolTable tbl) throws CompileError { - int t = lex.get(); // RETURN - Stmnt s = new Stmnt(t); - if (lex.lookAhead() != ';') - s.setLeft(parseExpression(tbl)); - - if (lex.get() != ';') - throw new CompileError("; is missing", lex); - - return s; - } - - /* throw.statement : THROW expression ";" - */ - private Stmnt parseThrow(SymbolTable tbl) throws CompileError { - int t = lex.get(); // THROW - ASTree expr = parseExpression(tbl); - if (lex.get() != ';') - throw new CompileError("; is missing", lex); - - return new Stmnt(t, expr); - } - - /* break.statement : BREAK [ Identifier ] ";" - */ - private Stmnt parseBreak(SymbolTable tbl) - throws CompileError - { - return parseContinue(tbl); - } - - /* continue.statement : CONTINUE [ Identifier ] ";" - */ - private Stmnt parseContinue(SymbolTable tbl) - throws CompileError - { - int t = lex.get(); // CONTINUE - Stmnt s = new Stmnt(t); - int t2 = lex.get(); - if (t2 == Identifier) { - s.setLeft(new Symbol(lex.getString())); - t2 = lex.get(); - } - - if (t2 != ';') - throw new CompileError("; is missing", lex); - - return s; - } - - /* declaration.or.expression - * : [ FINAL ] built-in-type array.dimension declarators - * | [ FINAL ] class.type array.dimension declarators - * | expression ';' - * | expr.list ';' if exprList is true - * - * Note: FINAL is currently ignored. This must be fixed - * in future. - */ - private Stmnt parseDeclarationOrExpression(SymbolTable tbl, - boolean exprList) - throws CompileError - { - int t = lex.lookAhead(); - while (t == FINAL) { - lex.get(); - t = lex.lookAhead(); - } - - if (isBuiltinType(t)) { - t = lex.get(); - int dim = parseArrayDimension(); - return parseDeclarators(tbl, new Declarator(t, dim)); - } - else if (t == Identifier) { - int i = nextIsClassType(0); - if (i >= 0) - if (lex.lookAhead(i) == Identifier) { - ASTList name = parseClassType(tbl); - int dim = parseArrayDimension(); - return parseDeclarators(tbl, new Declarator(name, dim)); - } - } - - Stmnt expr; - if (exprList) - expr = parseExprList(tbl); - else - expr = new Stmnt(EXPR, parseExpression(tbl)); - - if (lex.get() != ';') - throw new CompileError("; is missing", lex); - - return expr; - } - - /* expr.list : ( expression ',')* expression - */ - private Stmnt parseExprList(SymbolTable tbl) throws CompileError { - Stmnt expr = null; - for (;;) { - Stmnt e = new Stmnt(EXPR, parseExpression(tbl)); - expr = (Stmnt)ASTList.concat(expr, new Stmnt(BLOCK, e)); - if (lex.lookAhead() == ',') - lex.get(); - else - return expr; - } - } - - /* declarators : declarator [ ',' declarator ]* ';' - */ - private Stmnt parseDeclarators(SymbolTable tbl, Declarator d) - throws CompileError - { - Stmnt decl = null; - for (;;) { - decl = (Stmnt)ASTList.concat(decl, - new Stmnt(DECL, parseDeclarator(tbl, d))); - int t = lex.get(); - if (t == ';') - return decl; - else if (t != ',') - throw new CompileError("; is missing", lex); - } - } - - /* declarator : Identifier array.dimension [ '=' initializer ] - */ - private Declarator parseDeclarator(SymbolTable tbl, Declarator d) - throws CompileError - { - if (lex.get() != Identifier || d.getType() == VOID) - throw new SyntaxError(lex); - - String name = lex.getString(); - Symbol symbol = new Symbol(name); - int dim = parseArrayDimension(); - ASTree init = null; - if (lex.lookAhead() == '=') { - lex.get(); - init = parseInitializer(tbl); - } - - Declarator decl = d.make(symbol, dim, init); - tbl.append(name, decl); - return decl; - } - - /* initializer : expression | array.initializer - */ - private ASTree parseInitializer(SymbolTable tbl) throws CompileError { - if (lex.lookAhead() == '{') - return parseArrayInitializer(tbl); - else - return parseExpression(tbl); - } - - /* array.initializer : - * '{' (( array.initializer | expression ) ',')* '}' - */ - private ArrayInit parseArrayInitializer(SymbolTable tbl) - throws CompileError - { - lex.get(); // '{' - ASTree expr = parseExpression(tbl); - ArrayInit init = new ArrayInit(expr); - while (lex.lookAhead() == ',') { - lex.get(); - expr = parseExpression(tbl); - ASTList.append(init, expr); - } - - if (lex.get() != '}') - throw new SyntaxError(lex); - - return init; - } - - /* par.expression : '(' expression ')' - */ - private ASTree parseParExpression(SymbolTable tbl) throws CompileError { - if (lex.get() != '(') - throw new SyntaxError(lex); - - ASTree expr = parseExpression(tbl); - if (lex.get() != ')') - throw new SyntaxError(lex); - - return expr; - } - - /* expression : conditional.expr - * | conditional.expr assign.op expression (right-to-left) - */ - public ASTree parseExpression(SymbolTable tbl) throws CompileError { - ASTree left = parseConditionalExpr(tbl); - if (!isAssignOp(lex.lookAhead())) - return left; - - int t = lex.get(); - ASTree right = parseExpression(tbl); - return AssignExpr.makeAssign(t, left, right); - } - - private static boolean isAssignOp(int t) { - return t == '=' || t == MOD_E || t == AND_E - || t == MUL_E || t == PLUS_E || t == MINUS_E || t == DIV_E - || t == EXOR_E || t == OR_E || t == LSHIFT_E - || t == RSHIFT_E || t == ARSHIFT_E; - } - - /* conditional.expr (right-to-left) - * : logical.or.expr [ '?' expression ':' conditional.expr ] - */ - private ASTree parseConditionalExpr(SymbolTable tbl) throws CompileError { - ASTree cond = parseBinaryExpr(tbl); - if (lex.lookAhead() == '?') { - lex.get(); - ASTree thenExpr = parseExpression(tbl); - if (lex.get() != ':') - throw new CompileError(": is missing", lex); - - ASTree elseExpr = parseExpression(tbl); - return new CondExpr(cond, thenExpr, elseExpr); - } - else - return cond; - } - - /* logical.or.expr 10 (operator precedence) - * : logical.and.expr - * | logical.or.expr OROR logical.and.expr left-to-right - * - * logical.and.expr 9 - * : inclusive.or.expr - * | logical.and.expr ANDAND inclusive.or.expr - * - * inclusive.or.expr 8 - * : exclusive.or.expr - * | inclusive.or.expr "|" exclusive.or.expr - * - * exclusive.or.expr 7 - * : and.expr - * | exclusive.or.expr "^" and.expr - * - * and.expr 6 - * : equality.expr - * | and.expr "&" equality.expr - * - * equality.expr 5 - * : relational.expr - * | equality.expr (EQ | NEQ) relational.expr - * - * relational.expr 4 - * : shift.expr - * | relational.expr (LE | GE | "<" | ">") shift.expr - * | relational.expr INSTANCEOF class.type ("[" "]")* - * - * shift.expr 3 - * : additive.expr - * | shift.expr (LSHIFT | RSHIFT | ARSHIFT) additive.expr - * - * additive.expr 2 - * : multiply.expr - * | additive.expr ("+" | "-") multiply.expr - * - * multiply.expr 1 - * : unary.expr - * | multiply.expr ("*" | "/" | "%") unary.expr - */ - private ASTree parseBinaryExpr(SymbolTable tbl) throws CompileError { - ASTree expr = parseUnaryExpr(tbl); - for (;;) { - int t = lex.lookAhead(); - int p = getOpPrecedence(t); - if (p == 0) - return expr; - else - expr = binaryExpr2(tbl, expr, p); - } - } - - private ASTree parseInstanceOf(SymbolTable tbl, ASTree expr) - throws CompileError - { - int t = lex.lookAhead(); - if (isBuiltinType(t)) { - lex.get(); // primitive type - int dim = parseArrayDimension(); - return new InstanceOfExpr(t, dim, expr); - } - else { - ASTList name = parseClassType(tbl); - int dim = parseArrayDimension(); - return new InstanceOfExpr(name, dim, expr); - } - } - - private ASTree binaryExpr2(SymbolTable tbl, ASTree expr, int prec) - throws CompileError - { - int t = lex.get(); - if (t == INSTANCEOF) - return parseInstanceOf(tbl, expr); - - ASTree expr2 = parseUnaryExpr(tbl); - for (;;) { - int t2 = lex.lookAhead(); - int p2 = getOpPrecedence(t2); - if (p2 != 0 && prec > p2) - expr2 = binaryExpr2(tbl, expr2, p2); - else - return BinExpr.makeBin(t, expr, expr2); - } - } - - // !"#$%&'( )*+,-./0 12345678 9:;<=>? - private static final int[] binaryOpPrecedence - = { 0, 0, 0, 0, 1, 6, 0, 0, - 0, 1, 2, 0, 2, 0, 1, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 4, 0, 4, 0 }; - - private int getOpPrecedence(int c) { - if ('!' <= c && c <= '?') - return binaryOpPrecedence[c - '!']; - else if (c == '^') - return 7; - else if (c == '|') - return 8; - else if (c == ANDAND) - return 9; - else if (c == OROR) - return 10; - else if (c == EQ || c == NEQ) - return 5; - else if (c == LE || c == GE || c == INSTANCEOF) - return 4; - else if (c == LSHIFT || c == RSHIFT || c == ARSHIFT) - return 3; - else - return 0; // not a binary operator - } - - /* unary.expr : "++"|"--" unary.expr - | "+"|"-" unary.expr - | "!"|"~" unary.expr - | cast.expr - | postfix.expr - - unary.expr.not.plus.minus is a unary expression starting without - "+", "-", "++", or "--". - */ - private ASTree parseUnaryExpr(SymbolTable tbl) throws CompileError { - int t; - switch (lex.lookAhead()) { - case '+' : - case '-' : - case PLUSPLUS : - case MINUSMINUS : - case '!' : - case '~' : - t = lex.get(); - if (t == '-') { - int t2 = lex.lookAhead(); - switch (t2) { - case LongConstant : - case IntConstant : - case CharConstant : - lex.get(); - return new IntConst(-lex.getLong(), t2); - case DoubleConstant : - case FloatConstant : - lex.get(); - return new DoubleConst(-lex.getDouble(), t2); - default : - break; - } - } - - return Expr.make(t, parseUnaryExpr(tbl)); - case '(' : - return parseCast(tbl); - default : - return parsePostfix(tbl); - } - } - - /* cast.expr : "(" builtin.type ("[" "]")* ")" unary.expr - | "(" class.type ("[" "]")* ")" unary.expr2 - - unary.expr2 is a unary.expr beginning with "(", NULL, StringL, - Identifier, THIS, SUPER, or NEW. - - Either "(int.class)" or "(String[].class)" is a not cast expression. - */ - private ASTree parseCast(SymbolTable tbl) throws CompileError { - int t = lex.lookAhead(1); - if (isBuiltinType(t) && nextIsBuiltinCast()) { - lex.get(); // '(' - lex.get(); // primitive type - int dim = parseArrayDimension(); - if (lex.get() != ')') - throw new CompileError(") is missing", lex); - - return new CastExpr(t, dim, parseUnaryExpr(tbl)); - } - else if (t == Identifier && nextIsClassCast()) { - lex.get(); // '(' - ASTList name = parseClassType(tbl); - int dim = parseArrayDimension(); - if (lex.get() != ')') - throw new CompileError(") is missing", lex); - - return new CastExpr(name, dim, parseUnaryExpr(tbl)); - } - else - return parsePostfix(tbl); - } - - private boolean nextIsBuiltinCast() { - int t; - int i = 2; - while ((t = lex.lookAhead(i++)) == '[') - if (lex.lookAhead(i++) != ']') - return false; - - return lex.lookAhead(i - 1) == ')'; - } - - private boolean nextIsClassCast() { - int i = nextIsClassType(1); - if (i < 0) - return false; - - int t = lex.lookAhead(i); - if (t != ')') - return false; - - t = lex.lookAhead(i + 1); - return t == '(' || t == NULL || t == StringL - || t == Identifier || t == THIS || t == SUPER || t == NEW - || t == TRUE || t == FALSE || t == LongConstant - || t == IntConstant || t == CharConstant - || t == DoubleConstant || t == FloatConstant; - } - - private int nextIsClassType(int i) { - int t; - while (lex.lookAhead(++i) == '.') - if (lex.lookAhead(++i) != Identifier) - return -1; - - while ((t = lex.lookAhead(i++)) == '[') - if (lex.lookAhead(i++) != ']') - return -1; - - return i - 1; - } - - /* array.dimension : [ "[" "]" ]* - */ - private int parseArrayDimension() throws CompileError { - int arrayDim = 0; - while (lex.lookAhead() == '[') { - ++arrayDim; - lex.get(); - if (lex.get() != ']') - throw new CompileError("] is missing", lex); - } - - return arrayDim; - } - - /* class.type : Identifier ( "." Identifier )* - */ - private ASTList parseClassType(SymbolTable tbl) throws CompileError { - ASTList list = null; - for (;;) { - if (lex.get() != Identifier) - throw new SyntaxError(lex); - - list = ASTList.append(list, new Symbol(lex.getString())); - if (lex.lookAhead() == '.') - lex.get(); - else - break; - } - - return list; - } - - /* postfix.expr : number.literal - * | primary.expr - * | method.expr - * | postfix.expr "++" | "--" - * | postfix.expr "[" array.size "]" - * | postfix.expr "." Identifier - * | postfix.expr ( "[" "]" )* "." CLASS - * | postfix.expr "#" Identifier - * | postfix.expr "." SUPER - * - * "#" is not an operator of regular Java. It separates - * a class name and a member name in an expression for static member - * access. For example, - * java.lang.Integer.toString(3) in regular Java - * can be written like this: - * java.lang.Integer#toString(3) for this compiler. - */ - private ASTree parsePostfix(SymbolTable tbl) throws CompileError { - int token = lex.lookAhead(); - switch (token) { // see also parseUnaryExpr() - case LongConstant : - case IntConstant : - case CharConstant : - lex.get(); - return new IntConst(lex.getLong(), token); - case DoubleConstant : - case FloatConstant : - lex.get(); - return new DoubleConst(lex.getDouble(), token); - default : - break; - } - - String str; - ASTree index; - ASTree expr = parsePrimaryExpr(tbl); - int t; - while (true) { - switch (lex.lookAhead()) { - case '(' : - expr = parseMethodCall(tbl, expr); - break; - case '[' : - if (lex.lookAhead(1) == ']') { - int dim = parseArrayDimension(); - if (lex.get() != '.' || lex.get() != CLASS) - throw new SyntaxError(lex); - - expr = parseDotClass(expr, dim); - } - else { - index = parseArrayIndex(tbl); - if (index == null) - throw new SyntaxError(lex); - - expr = Expr.make(ARRAY, expr, index); - } - break; - case PLUSPLUS : - case MINUSMINUS : - t = lex.get(); - expr = Expr.make(t, null, expr); - break; - case '.' : - lex.get(); - t = lex.get(); - if (t == CLASS) - expr = parseDotClass(expr, 0); - else if (t == SUPER) - expr = Expr.make('.', new Symbol(toClassName(expr)), new Keyword(t)); - else if (t == Identifier) { - str = lex.getString(); - expr = Expr.make('.', expr, new Member(str)); - } - else - throw new CompileError("missing member name", lex); - break; - case '#' : - lex.get(); - t = lex.get(); - if (t != Identifier) - throw new CompileError("missing static member name", lex); - - str = lex.getString(); - expr = Expr.make(MEMBER, new Symbol(toClassName(expr)), - new Member(str)); - break; - default : - return expr; - } - } - } - - /* Parse a .class expression on a class type. For example, - * String.class => ('.' "String" "class") - * String[].class => ('.' "[LString;" "class") - */ - private ASTree parseDotClass(ASTree className, int dim) - throws CompileError - { - String cname = toClassName(className); - if (dim > 0) { - StringBuffer sbuf = new StringBuffer(); - while (dim-- > 0) - sbuf.append('['); - - sbuf.append('L').append(cname.replace('.', '/')).append(';'); - cname = sbuf.toString(); - } - - return Expr.make('.', new Symbol(cname), new Member("class")); - } - - /* Parses a .class expression on a built-in type. For example, - * int.class => ('#' "java.lang.Integer" "TYPE") - * int[].class => ('.' "[I", "class") - */ - private ASTree parseDotClass(int builtinType, int dim) - throws CompileError - { - if (dim > 0) { - String cname = CodeGen.toJvmTypeName(builtinType, dim); - return Expr.make('.', new Symbol(cname), new Member("class")); - } - else { - String cname; - switch(builtinType) { - case BOOLEAN : - cname = "java.lang.Boolean"; - break; - case BYTE : - cname = "java.lang.Byte"; - break; - case CHAR : - cname = "java.lang.Character"; - break; - case SHORT : - cname = "java.lang.Short"; - break; - case INT : - cname = "java.lang.Integer"; - break; - case LONG : - cname = "java.lang.Long"; - break; - case FLOAT : - cname = "java.lang.Float"; - break; - case DOUBLE : - cname = "java.lang.Double"; - break; - case VOID : - cname = "java.lang.Void"; - break; - default : - throw new CompileError("invalid builtin type: " - + builtinType); - } - - return Expr.make(MEMBER, new Symbol(cname), new Member("TYPE")); - } - } - - /* method.call : method.expr "(" argument.list ")" - * method.expr : THIS | SUPER | Identifier - * | postfix.expr "." Identifier - * | postfix.expr "#" Identifier - */ - private ASTree parseMethodCall(SymbolTable tbl, ASTree expr) - throws CompileError - { - if (expr instanceof Keyword) { - int token = ((Keyword)expr).get(); - if (token != THIS && token != SUPER) - throw new SyntaxError(lex); - } - else if (expr instanceof Symbol) // Identifier - ; - else if (expr instanceof Expr) { - int op = ((Expr)expr).getOperator(); - if (op != '.' && op != MEMBER) - throw new SyntaxError(lex); - } - - return CallExpr.makeCall(expr, parseArgumentList(tbl)); - } - - private String toClassName(ASTree name) - throws CompileError - { - StringBuffer sbuf = new StringBuffer(); - toClassName(name, sbuf); - return sbuf.toString(); - } - - private void toClassName(ASTree name, StringBuffer sbuf) - throws CompileError - { - if (name instanceof Symbol) { - sbuf.append(((Symbol)name).get()); - return; - } - else if (name instanceof Expr) { - Expr expr = (Expr)name; - if (expr.getOperator() == '.') { - toClassName(expr.oprand1(), sbuf); - sbuf.append('.'); - toClassName(expr.oprand2(), sbuf); - return; - } - } - - throw new CompileError("bad static member access", lex); - } - - /* primary.expr : THIS | SUPER | TRUE | FALSE | NULL - * | StringL - * | Identifier - * | NEW new.expr - * | "(" expression ")" - * | builtin.type ( "[" "]" )* "." CLASS - * - * Identifier represents either a local variable name, a member name, - * or a class name. - */ - private ASTree parsePrimaryExpr(SymbolTable tbl) throws CompileError { - int t; - String name; - Declarator decl; - ASTree expr; - - switch (t = lex.get()) { - case THIS : - case SUPER : - case TRUE : - case FALSE : - case NULL : - return new Keyword(t); - case Identifier : - name = lex.getString(); - decl = tbl.lookup(name); - if (decl == null) - return new Member(name); // this or static member - else - return new Variable(name, decl); // local variable - case StringL : - return new StringL(lex.getString()); - case NEW : - return parseNew(tbl); - case '(' : - expr = parseExpression(tbl); - if (lex.get() == ')') - return expr; - else - throw new CompileError(") is missing", lex); - default : - if (isBuiltinType(t) || t == VOID) { - int dim = parseArrayDimension(); - if (lex.get() == '.' && lex.get() == CLASS) - return parseDotClass(t, dim); - } - - throw new SyntaxError(lex); - } - } - - /* new.expr : class.type "(" argument.list ")" - * | class.type array.size [ array.initializer ] - * | primitive.type array.size [ array.initializer ] - */ - private NewExpr parseNew(SymbolTable tbl) throws CompileError { - ArrayInit init = null; - int t = lex.lookAhead(); - if (isBuiltinType(t)) { - lex.get(); - ASTList size = parseArraySize(tbl); - if (lex.lookAhead() == '{') - init = parseArrayInitializer(tbl); - - return new NewExpr(t, size, init); - } - else if (t == Identifier) { - ASTList name = parseClassType(tbl); - t = lex.lookAhead(); - if (t == '(') { - ASTList args = parseArgumentList(tbl); - return new NewExpr(name, args); - } - else if (t == '[') { - ASTList size = parseArraySize(tbl); - if (lex.lookAhead() == '{') - init = parseArrayInitializer(tbl); - - return NewExpr.makeObjectArray(name, size, init); - } - } - - throw new SyntaxError(lex); - } - - /* array.size : [ array.index ]* - */ - private ASTList parseArraySize(SymbolTable tbl) throws CompileError { - ASTList list = null; - while (lex.lookAhead() == '[') - list = ASTList.append(list, parseArrayIndex(tbl)); - - return list; - } - - /* array.index : "[" [ expression ] "]" - */ - private ASTree parseArrayIndex(SymbolTable tbl) throws CompileError { - lex.get(); // '[' - if (lex.lookAhead() == ']') { - lex.get(); - return null; - } - else { - ASTree index = parseExpression(tbl); - if (lex.get() != ']') - throw new CompileError("] is missing", lex); - - return index; - } - } - - /* argument.list : "(" [ expression [ "," expression ]* ] ")" - */ - private ASTList parseArgumentList(SymbolTable tbl) throws CompileError { - if (lex.get() != '(') - throw new CompileError("( is missing", lex); - - ASTList list = null; - if (lex.lookAhead() != ')') - for (;;) { - list = ASTList.append(list, parseExpression(tbl)); - if (lex.lookAhead() == ',') - lex.get(); - else - break; - } - - if (lex.get() != ')') - throw new CompileError(") is missing", lex); - - return list; - } -} - diff --git a/src/com/wenshuo/agent/javassist/compiler/ProceedHandler.java b/src/com/wenshuo/agent/javassist/compiler/ProceedHandler.java deleted file mode 100644 index 7cb7ef4..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ProceedHandler.java +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.bytecode.Bytecode; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * An interface to an object for implementing $proceed(). - * - * @see javassist.compiler.JvstCodeGen#setProceedHandler(ProceedHandler, String) - */ -public interface ProceedHandler { - void doit(JvstCodeGen gen, Bytecode b, ASTList args) throws CompileError; - void setReturnType(JvstTypeChecker c, ASTList args) throws CompileError; -} diff --git a/src/com/wenshuo/agent/javassist/compiler/SymbolTable.java b/src/com/wenshuo/agent/javassist/compiler/SymbolTable.java deleted file mode 100644 index 1a3edc0..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/SymbolTable.java +++ /dev/null @@ -1,45 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import java.util.HashMap; -import com.wenshuo.agent.javassist.compiler.ast.Declarator; - -public final class SymbolTable extends HashMap { - private SymbolTable parent; - - public SymbolTable() { this(null); } - - public SymbolTable(SymbolTable p) { - super(); - parent = p; - } - - public SymbolTable getParent() { return parent; } - - public Declarator lookup(String name) { - Declarator found = (Declarator)get(name); - if (found == null && parent != null) - return parent.lookup(name); - else - return found; - } - - public void append(String name, Declarator value) { - put(name, value); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/SyntaxError.java b/src/com/wenshuo/agent/javassist/compiler/SyntaxError.java deleted file mode 100644 index 5a6f4b4..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/SyntaxError.java +++ /dev/null @@ -1,23 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -public class SyntaxError extends CompileError { - public SyntaxError(Lex lexer) { - super("syntax error near \"" + lexer.getTextAround() + "\"", lexer); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/TokenId.java b/src/com/wenshuo/agent/javassist/compiler/TokenId.java deleted file mode 100644 index 58538a6..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/TokenId.java +++ /dev/null @@ -1,125 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -public interface TokenId { - int ABSTRACT = 300; - int BOOLEAN = 301; - int BREAK = 302; - int BYTE = 303; - int CASE = 304; - int CATCH = 305; - int CHAR = 306; - int CLASS = 307; - int CONST = 308; // reserved keyword - int CONTINUE = 309; - int DEFAULT = 310; - int DO = 311; - int DOUBLE = 312; - int ELSE = 313; - int EXTENDS = 314; - int FINAL = 315; - int FINALLY = 316; - int FLOAT = 317; - int FOR = 318; - int GOTO = 319; // reserved keyword - int IF = 320; - int IMPLEMENTS = 321; - int IMPORT = 322; - int INSTANCEOF = 323; - int INT = 324; - int INTERFACE = 325; - int LONG = 326; - int NATIVE = 327; - int NEW = 328; - int PACKAGE = 329; - int PRIVATE = 330; - int PROTECTED = 331; - int PUBLIC = 332; - int RETURN = 333; - int SHORT = 334; - int STATIC = 335; - int SUPER = 336; - int SWITCH = 337; - int SYNCHRONIZED = 338; - int THIS = 339; - int THROW = 340; - int THROWS = 341; - int TRANSIENT = 342; - int TRY = 343; - int VOID = 344; - int VOLATILE = 345; - int WHILE = 346; - int STRICT = 347; - - int NEQ = 350; // != - int MOD_E = 351; // %= - int AND_E = 352; // &= - int MUL_E = 353; // *= - int PLUS_E = 354; // += - int MINUS_E = 355; // -= - int DIV_E = 356; // /= - int LE = 357; // <= - int EQ = 358; // == - int GE = 359; // >= - int EXOR_E = 360; // ^= - int OR_E = 361; // |= - int PLUSPLUS = 362; // ++ - int MINUSMINUS = 363; // -- - int LSHIFT = 364; // << - int LSHIFT_E = 365; // <<= - int RSHIFT = 366; // >> - int RSHIFT_E = 367; // >>= - int OROR = 368; // || - int ANDAND = 369; // && - int ARSHIFT = 370; // >>> - int ARSHIFT_E = 371; // >>>= - - // operators from NEQ to ARSHIFT_E - String opNames[] = { "!=", "%=", "&=", "*=", "+=", "-=", "/=", - "<=", "==", ">=", "^=", "|=", "++", "--", - "<<", "<<=", ">>", ">>=", "||", "&&", ">>>", - ">>>=" }; - - // operators from MOD_E to ARSHIFT_E - int assignOps[] = { '%', '&', '*', '+', '-', '/', 0, 0, 0, - '^', '|', 0, 0, 0, LSHIFT, 0, RSHIFT, 0, 0, 0, - ARSHIFT }; - - int Identifier = 400; - int CharConstant = 401; - int IntConstant = 402; - int LongConstant = 403; - int FloatConstant = 404; - int DoubleConstant = 405; - int StringL = 406; - - int TRUE = 410; - int FALSE = 411; - int NULL = 412; - - int CALL = 'C'; // method call - int ARRAY = 'A'; // array access - int MEMBER = '#'; // static member access - - int EXPR = 'E'; // expression statement - int LABEL = 'L'; // label statement - int BLOCK = 'B'; // block statement - int DECL = 'D'; // declaration statement - - int BadToken = 500; -} diff --git a/src/com/wenshuo/agent/javassist/compiler/TypeChecker.java b/src/com/wenshuo/agent/javassist/compiler/TypeChecker.java deleted file mode 100644 index 80153d0..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/TypeChecker.java +++ /dev/null @@ -1,1044 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtField; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.compiler.ast.*; -import com.wenshuo.agent.javassist.bytecode.*; - -public class TypeChecker extends Visitor implements Opcode, TokenId { - static final String javaLangObject = "java.lang.Object"; - static final String jvmJavaLangObject = "java/lang/Object"; - static final String jvmJavaLangString = "java/lang/String"; - static final String jvmJavaLangClass = "java/lang/Class"; - - /* The following fields are used by atXXX() methods - * for returning the type of the compiled expression. - */ - protected int exprType; // VOID, NULL, CLASS, BOOLEAN, INT, ... - protected int arrayDim; - protected String className; // JVM-internal representation - - protected MemberResolver resolver; - protected CtClass thisClass; - protected MethodInfo thisMethod; - - public TypeChecker(CtClass cc, ClassPool cp) { - resolver = new MemberResolver(cp); - thisClass = cc; - thisMethod = null; - } - - /* - * Converts an array of tuples of exprType, arrayDim, and className - * into a String object. - */ - protected static String argTypesToString(int[] types, int[] dims, - String[] cnames) { - StringBuffer sbuf = new StringBuffer(); - sbuf.append('('); - int n = types.length; - if (n > 0) { - int i = 0; - while (true) { - typeToString(sbuf, types[i], dims[i], cnames[i]); - if (++i < n) - sbuf.append(','); - else - break; - } - } - - sbuf.append(')'); - return sbuf.toString(); - } - - /* - * Converts a tuple of exprType, arrayDim, and className - * into a String object. - */ - protected static StringBuffer typeToString(StringBuffer sbuf, - int type, int dim, String cname) { - String s; - if (type == CLASS) - s = MemberResolver.jvmToJavaName(cname); - else if (type == NULL) - s = "Object"; - else - try { - s = MemberResolver.getTypeName(type); - } - catch (CompileError e) { - s = "?"; - } - - sbuf.append(s); - while (dim-- > 0) - sbuf.append("[]"); - - return sbuf; - } - - /** - * Records the currently compiled method. - */ - public void setThisMethod(MethodInfo m) { - thisMethod = m; - } - - protected static void fatal() throws CompileError { - throw new CompileError("fatal"); - } - - /** - * Returns the JVM-internal representation of this class name. - */ - protected String getThisName() { - return MemberResolver.javaToJvmName(thisClass.getName()); - } - - /** - * Returns the JVM-internal representation of this super class name. - */ - protected String getSuperName() throws CompileError { - return MemberResolver.javaToJvmName( - MemberResolver.getSuperclass(thisClass).getName()); - } - - /* Converts a class name into a JVM-internal representation. - * - * It may also expand a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected String resolveClassName(ASTList name) throws CompileError { - return resolver.resolveClassName(name); - } - - /* Expands a simple class name to java.lang.*. - * For example, this converts Object into java/lang/Object. - */ - protected String resolveClassName(String jvmName) throws CompileError { - return resolver.resolveJvmClassName(jvmName); - } - - public void atNewExpr(NewExpr expr) throws CompileError { - if (expr.isArray()) - atNewArrayExpr(expr); - else { - CtClass clazz = resolver.lookupClassByName(expr.getClassName()); - String cname = clazz.getName(); - ASTList args = expr.getArguments(); - atMethodCallCore(clazz, MethodInfo.nameInit, args); - exprType = CLASS; - arrayDim = 0; - className = MemberResolver.javaToJvmName(cname); - } - } - - public void atNewArrayExpr(NewExpr expr) throws CompileError { - int type = expr.getArrayType(); - ASTList size = expr.getArraySize(); - ASTList classname = expr.getClassName(); - ASTree init = expr.getInitializer(); - if (init != null) - init.accept(this); - - if (size.length() > 1) - atMultiNewArray(type, classname, size); - else { - ASTree sizeExpr = size.head(); - if (sizeExpr != null) - sizeExpr.accept(this); - - exprType = type; - arrayDim = 1; - if (type == CLASS) - className = resolveClassName(classname); - else - className = null; - } - } - - public void atArrayInit(ArrayInit init) throws CompileError { - ASTList list = init; - while (list != null) { - ASTree h = list.head(); - list = list.tail(); - if (h != null) - h.accept(this); - } - } - - protected void atMultiNewArray(int type, ASTList classname, ASTList size) - throws CompileError - { - int count, dim; - dim = size.length(); - for (count = 0; size != null; size = size.tail()) { - ASTree s = size.head(); - if (s == null) - break; // int[][][] a = new int[3][4][]; - - ++count; - s.accept(this); - } - - exprType = type; - arrayDim = dim; - if (type == CLASS) - className = resolveClassName(classname); - else - className = null; - } - - public void atAssignExpr(AssignExpr expr) throws CompileError { - // =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, >>>= - int op = expr.getOperator(); - ASTree left = expr.oprand1(); - ASTree right = expr.oprand2(); - if (left instanceof Variable) - atVariableAssign(expr, op, (Variable)left, - ((Variable)left).getDeclarator(), - right); - else { - if (left instanceof Expr) { - Expr e = (Expr)left; - if (e.getOperator() == ARRAY) { - atArrayAssign(expr, op, (Expr)left, right); - return; - } - } - - atFieldAssign(expr, op, left, right); - } - } - - /* op is either =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, or >>>=. - * - * expr and var can be null. - */ - private void atVariableAssign(Expr expr, int op, Variable var, - Declarator d, ASTree right) - throws CompileError - { - int varType = d.getType(); - int varArray = d.getArrayDim(); - String varClass = d.getClassName(); - - if (op != '=') - atVariable(var); - - right.accept(this); - exprType = varType; - arrayDim = varArray; - className = varClass; - } - - private void atArrayAssign(Expr expr, int op, Expr array, - ASTree right) throws CompileError - { - atArrayRead(array.oprand1(), array.oprand2()); - int aType = exprType; - int aDim = arrayDim; - String cname = className; - right.accept(this); - exprType = aType; - arrayDim = aDim; - className = cname; - } - - protected void atFieldAssign(Expr expr, int op, ASTree left, ASTree right) - throws CompileError - { - CtField f = fieldAccess(left); - atFieldRead(f); - int fType = exprType; - int fDim = arrayDim; - String cname = className; - right.accept(this); - exprType = fType; - arrayDim = fDim; - className = cname; - } - - public void atCondExpr(CondExpr expr) throws CompileError { - booleanExpr(expr.condExpr()); - expr.thenExpr().accept(this); - int type1 = exprType; - int dim1 = arrayDim; - String cname1 = className; - expr.elseExpr().accept(this); - - if (dim1 == 0 && dim1 == arrayDim) - if (CodeGen.rightIsStrong(type1, exprType)) - expr.setThen(new CastExpr(exprType, 0, expr.thenExpr())); - else if (CodeGen.rightIsStrong(exprType, type1)) { - expr.setElse(new CastExpr(type1, 0, expr.elseExpr())); - exprType = type1; - } - } - - /* - * If atBinExpr() substitutes a new expression for the original - * binary-operator expression, it changes the operator name to '+' - * (if the original is not '+') and sets the new expression to the - * left-hand-side expression and null to the right-hand-side expression. - */ - public void atBinExpr(BinExpr expr) throws CompileError { - int token = expr.getOperator(); - int k = CodeGen.lookupBinOp(token); - if (k >= 0) { - /* arithmetic operators: +, -, *, /, %, |, ^, &, <<, >>, >>> - */ - if (token == '+') { - Expr e = atPlusExpr(expr); - if (e != null) { - /* String concatenation has been translated into - * an expression using StringBuffer. - */ - e = CallExpr.makeCall(Expr.make('.', e, - new Member("toString")), null); - expr.setOprand1(e); - expr.setOprand2(null); // <---- look at this! - className = jvmJavaLangString; - } - } - else { - ASTree left = expr.oprand1(); - ASTree right = expr.oprand2(); - left.accept(this); - int type1 = exprType; - right.accept(this); - if (!isConstant(expr, token, left, right)) - computeBinExprType(expr, token, type1); - } - } - else { - /* equation: &&, ||, ==, !=, <=, >=, <, > - */ - booleanExpr(expr); - } - } - - /* EXPR must be a + expression. - * atPlusExpr() returns non-null if the given expression is string - * concatenation. The returned value is "new StringBuffer().append..". - */ - private Expr atPlusExpr(BinExpr expr) throws CompileError { - ASTree left = expr.oprand1(); - ASTree right = expr.oprand2(); - if (right == null) { - // this expression has been already type-checked. - // see atBinExpr() above. - left.accept(this); - return null; - } - - if (isPlusExpr(left)) { - Expr newExpr = atPlusExpr((BinExpr)left); - if (newExpr != null) { - right.accept(this); - exprType = CLASS; - arrayDim = 0; - className = "java/lang/StringBuffer"; - return makeAppendCall(newExpr, right); - } - } - else - left.accept(this); - - int type1 = exprType; - int dim1 = arrayDim; - String cname = className; - right.accept(this); - - if (isConstant(expr, '+', left, right)) - return null; - - if ((type1 == CLASS && dim1 == 0 && jvmJavaLangString.equals(cname)) - || (exprType == CLASS && arrayDim == 0 - && jvmJavaLangString.equals(className))) { - ASTList sbufClass = ASTList.make(new Symbol("java"), - new Symbol("lang"), new Symbol("StringBuffer")); - ASTree e = new NewExpr(sbufClass, null); - exprType = CLASS; - arrayDim = 0; - className = "java/lang/StringBuffer"; - return makeAppendCall(makeAppendCall(e, left), right); - } - else { - computeBinExprType(expr, '+', type1); - return null; - } - } - - private boolean isConstant(BinExpr expr, int op, ASTree left, - ASTree right) throws CompileError - { - left = stripPlusExpr(left); - right = stripPlusExpr(right); - ASTree newExpr = null; - if (left instanceof StringL && right instanceof StringL && op == '+') - newExpr = new StringL(((StringL)left).get() - + ((StringL)right).get()); - else if (left instanceof IntConst) - newExpr = ((IntConst)left).compute(op, right); - else if (left instanceof DoubleConst) - newExpr = ((DoubleConst)left).compute(op, right); - - if (newExpr == null) - return false; // not a constant expression - else { - expr.setOperator('+'); - expr.setOprand1(newExpr); - expr.setOprand2(null); - newExpr.accept(this); // for setting exprType, arrayDim, ... - return true; - } - } - - /* CodeGen.atSwitchStmnt() also calls stripPlusExpr(). - */ - static ASTree stripPlusExpr(ASTree expr) { - if (expr instanceof BinExpr) { - BinExpr e = (BinExpr)expr; - if (e.getOperator() == '+' && e.oprand2() == null) - return e.getLeft(); - } - else if (expr instanceof Expr) { // note: BinExpr extends Expr. - Expr e = (Expr)expr; - int op = e.getOperator(); - if (op == MEMBER) { - ASTree cexpr = getConstantFieldValue((Member)e.oprand2()); - if (cexpr != null) - return cexpr; - } - else if (op == '+' && e.getRight() == null) - return e.getLeft(); - } - else if (expr instanceof Member) { - ASTree cexpr = getConstantFieldValue((Member)expr); - if (cexpr != null) - return cexpr; - } - - return expr; - } - - /** - * If MEM is a static final field, this method returns a constant - * expression representing the value of that field. - */ - private static ASTree getConstantFieldValue(Member mem) { - return getConstantFieldValue(mem.getField()); - } - - public static ASTree getConstantFieldValue(CtField f) { - if (f == null) - return null; - - Object value = f.getConstantValue(); - if (value == null) - return null; - - if (value instanceof String) - return new StringL((String)value); - else if (value instanceof Double || value instanceof Float) { - int token = (value instanceof Double) - ? DoubleConstant : FloatConstant; - return new DoubleConst(((Number)value).doubleValue(), token); - } - else if (value instanceof Number) { - int token = (value instanceof Long) ? LongConstant : IntConstant; - return new IntConst(((Number)value).longValue(), token); - } - else if (value instanceof Boolean) - return new Keyword(((Boolean)value).booleanValue() - ? TokenId.TRUE : TokenId.FALSE); - else - return null; - } - - private static boolean isPlusExpr(ASTree expr) { - if (expr instanceof BinExpr) { - BinExpr bexpr = (BinExpr)expr; - int token = bexpr.getOperator(); - return token == '+'; - } - - return false; - } - - private static Expr makeAppendCall(ASTree target, ASTree arg) { - return CallExpr.makeCall(Expr.make('.', target, new Member("append")), - new ASTList(arg)); - } - - private void computeBinExprType(BinExpr expr, int token, int type1) - throws CompileError - { - // arrayDim should be 0. - int type2 = exprType; - if (token == LSHIFT || token == RSHIFT || token == ARSHIFT) - exprType = type1; - else - insertCast(expr, type1, type2); - - if (CodeGen.isP_INT(exprType)) - exprType = INT; // type1 may be BYTE, ... - } - - private void booleanExpr(ASTree expr) - throws CompileError - { - int op = CodeGen.getCompOperator(expr); - if (op == EQ) { // ==, !=, ... - BinExpr bexpr = (BinExpr)expr; - bexpr.oprand1().accept(this); - int type1 = exprType; - int dim1 = arrayDim; - bexpr.oprand2().accept(this); - if (dim1 == 0 && arrayDim == 0) - insertCast(bexpr, type1, exprType); - } - else if (op == '!') - ((Expr)expr).oprand1().accept(this); - else if (op == ANDAND || op == OROR) { - BinExpr bexpr = (BinExpr)expr; - bexpr.oprand1().accept(this); - bexpr.oprand2().accept(this); - } - else // others - expr.accept(this); - - exprType = BOOLEAN; - arrayDim = 0; - } - - private void insertCast(BinExpr expr, int type1, int type2) - throws CompileError - { - if (CodeGen.rightIsStrong(type1, type2)) - expr.setLeft(new CastExpr(type2, 0, expr.oprand1())); - else - exprType = type1; - } - - public void atCastExpr(CastExpr expr) throws CompileError { - String cname = resolveClassName(expr.getClassName()); - expr.getOprand().accept(this); - exprType = expr.getType(); - arrayDim = expr.getArrayDim(); - className = cname; - } - - public void atInstanceOfExpr(InstanceOfExpr expr) throws CompileError { - expr.getOprand().accept(this); - exprType = BOOLEAN; - arrayDim = 0; - } - - public void atExpr(Expr expr) throws CompileError { - // array access, member access, - // (unary) +, (unary) -, ++, --, !, ~ - - int token = expr.getOperator(); - ASTree oprand = expr.oprand1(); - if (token == '.') { - String member = ((Symbol)expr.oprand2()).get(); - if (member.equals("length")) - try { - atArrayLength(expr); - } - catch (NoFieldException nfe) { - // length might be a class or package name. - atFieldRead(expr); - } - else if (member.equals("class")) - atClassObject(expr); // .class - else - atFieldRead(expr); - } - else if (token == MEMBER) { // field read - String member = ((Symbol)expr.oprand2()).get(); - if (member.equals("class")) - atClassObject(expr); // .class - else - atFieldRead(expr); - } - else if (token == ARRAY) - atArrayRead(oprand, expr.oprand2()); - else if (token == PLUSPLUS || token == MINUSMINUS) - atPlusPlus(token, oprand, expr); - else if (token == '!') - booleanExpr(expr); - else if (token == CALL) // method call - fatal(); - else { - oprand.accept(this); - if (!isConstant(expr, token, oprand)) - if (token == '-' || token == '~') - if (CodeGen.isP_INT(exprType)) - exprType = INT; // type may be BYTE, ... - } - } - - private boolean isConstant(Expr expr, int op, ASTree oprand) { - oprand = stripPlusExpr(oprand); - if (oprand instanceof IntConst) { - IntConst c = (IntConst)oprand; - long v = c.get(); - if (op == '-') - v = -v; - else if (op == '~') - v = ~v; - else - return false; - - c.set(v); - } - else if (oprand instanceof DoubleConst) { - DoubleConst c = (DoubleConst)oprand; - if (op == '-') - c.set(-c.get()); - else - return false; - } - else - return false; - - expr.setOperator('+'); - return true; - } - - public void atCallExpr(CallExpr expr) throws CompileError { - String mname = null; - CtClass targetClass = null; - ASTree method = expr.oprand1(); - ASTList args = (ASTList)expr.oprand2(); - - if (method instanceof Member) { - mname = ((Member)method).get(); - targetClass = thisClass; - } - else if (method instanceof Keyword) { // constructor - mname = MethodInfo.nameInit; // - if (((Keyword)method).get() == SUPER) - targetClass = MemberResolver.getSuperclass(thisClass); - else - targetClass = thisClass; - } - else if (method instanceof Expr) { - Expr e = (Expr)method; - mname = ((Symbol)e.oprand2()).get(); - int op = e.getOperator(); - if (op == MEMBER) // static method - targetClass - = resolver.lookupClass(((Symbol)e.oprand1()).get(), - false); - else if (op == '.') { - ASTree target = e.oprand1(); - String classFollowedByDotSuper = isDotSuper(target); - if (classFollowedByDotSuper != null) - targetClass = MemberResolver.getSuperInterface(thisClass, - classFollowedByDotSuper); - else { - try { - target.accept(this); - } - catch (NoFieldException nfe) { - if (nfe.getExpr() != target) - throw nfe; - - // it should be a static method. - exprType = CLASS; - arrayDim = 0; - className = nfe.getField(); // JVM-internal - e.setOperator(MEMBER); - e.setOprand1(new Symbol(MemberResolver.jvmToJavaName( - className))); - } - - if (arrayDim > 0) - targetClass = resolver.lookupClass(javaLangObject, true); - else if (exprType == CLASS /* && arrayDim == 0 */) - targetClass = resolver.lookupClassByJvmName(className); - else - badMethod(); - } - } - else - badMethod(); - } - else - fatal(); - - MemberResolver.Method minfo - = atMethodCallCore(targetClass, mname, args); - expr.setMethod(minfo); - } - - private static void badMethod() throws CompileError { - throw new CompileError("bad method"); - } - - /** - * Returns non-null if target is something like Foo.super - * for accessing the default method in an interface. - * Otherwise, null. - * - * @return the class name followed by {@code .super} or null. - */ - static String isDotSuper(ASTree target) { - if (target instanceof Expr) { - Expr e = (Expr)target; - if (e.getOperator() == '.') { - ASTree right = e.oprand2(); - if (right instanceof Keyword && ((Keyword)right).get() == SUPER) - return ((Symbol)e.oprand1()).get(); - } - } - - return null; - } - - /** - * @return a pair of the class declaring the invoked method - * and the MethodInfo of that method. Never null. - */ - public MemberResolver.Method atMethodCallCore(CtClass targetClass, - String mname, ASTList args) - throws CompileError - { - int nargs = getMethodArgsLength(args); - int[] types = new int[nargs]; - int[] dims = new int[nargs]; - String[] cnames = new String[nargs]; - atMethodArgs(args, types, dims, cnames); - - MemberResolver.Method found - = resolver.lookupMethod(targetClass, thisClass, thisMethod, - mname, types, dims, cnames); - if (found == null) { - String clazz = targetClass.getName(); - String signature = argTypesToString(types, dims, cnames); - String msg; - if (mname.equals(MethodInfo.nameInit)) - msg = "cannot find constructor " + clazz + signature; - else - msg = mname + signature + " not found in " + clazz; - - throw new CompileError(msg); - } - - String desc = found.info.getDescriptor(); - setReturnType(desc); - return found; - } - - public int getMethodArgsLength(ASTList args) { - return ASTList.length(args); - } - - public void atMethodArgs(ASTList args, int[] types, int[] dims, - String[] cnames) throws CompileError { - int i = 0; - while (args != null) { - ASTree a = args.head(); - a.accept(this); - types[i] = exprType; - dims[i] = arrayDim; - cnames[i] = className; - ++i; - args = args.tail(); - } - } - - void setReturnType(String desc) throws CompileError { - int i = desc.indexOf(')'); - if (i < 0) - badMethod(); - - char c = desc.charAt(++i); - int dim = 0; - while (c == '[') { - ++dim; - c = desc.charAt(++i); - } - - arrayDim = dim; - if (c == 'L') { - int j = desc.indexOf(';', i + 1); - if (j < 0) - badMethod(); - - exprType = CLASS; - className = desc.substring(i + 1, j); - } - else { - exprType = MemberResolver.descToType(c); - className = null; - } - } - - private void atFieldRead(ASTree expr) throws CompileError { - atFieldRead(fieldAccess(expr)); - } - - private void atFieldRead(CtField f) throws CompileError { - FieldInfo finfo = f.getFieldInfo2(); - String type = finfo.getDescriptor(); - - int i = 0; - int dim = 0; - char c = type.charAt(i); - while (c == '[') { - ++dim; - c = type.charAt(++i); - } - - arrayDim = dim; - exprType = MemberResolver.descToType(c); - - if (c == 'L') - className = type.substring(i + 1, type.indexOf(';', i + 1)); - else - className = null; - } - - /* if EXPR is to access a static field, fieldAccess() translates EXPR - * into an expression using '#' (MEMBER). For example, it translates - * java.lang.Integer.TYPE into java.lang.Integer#TYPE. This translation - * speeds up type resolution by MemberCodeGen. - */ - protected CtField fieldAccess(ASTree expr) throws CompileError { - if (expr instanceof Member) { - Member mem = (Member)expr; - String name = mem.get(); - try { - CtField f = thisClass.getField(name); - if (Modifier.isStatic(f.getModifiers())) - mem.setField(f); - - return f; - } - catch (NotFoundException e) { - // EXPR might be part of a static member access? - throw new NoFieldException(name, expr); - } - } - else if (expr instanceof Expr) { - Expr e = (Expr)expr; - int op = e.getOperator(); - if (op == MEMBER) { - Member mem = (Member)e.oprand2(); - CtField f - = resolver.lookupField(((Symbol)e.oprand1()).get(), mem); - mem.setField(f); - return f; - } - else if (op == '.') { - try { - e.oprand1().accept(this); - } - catch (NoFieldException nfe) { - if (nfe.getExpr() != e.oprand1()) - throw nfe; - - /* EXPR should be a static field. - * If EXPR might be part of a qualified class name, - * lookupFieldByJvmName2() throws NoFieldException. - */ - return fieldAccess2(e, nfe.getField()); - } - - CompileError err = null; - try { - if (exprType == CLASS && arrayDim == 0) - return resolver.lookupFieldByJvmName(className, - (Symbol)e.oprand2()); - } - catch (CompileError ce) { - err = ce; - } - - /* If a filed name is the same name as a package's, - * a static member of a class in that package is not - * visible. For example, - * - * class Foo { - * int javassist; - * } - * - * It is impossible to add the following method: - * - * String m() { return javassist.CtClass.intType.toString(); } - * - * because javassist is a field name. However, this is - * often inconvenient, this compiler allows it. The following - * code is for that. - */ - ASTree oprnd1 = e.oprand1(); - if (oprnd1 instanceof Symbol) - return fieldAccess2(e, ((Symbol)oprnd1).get()); - - if (err != null) - throw err; - } - } - - throw new CompileError("bad filed access"); - } - - private CtField fieldAccess2(Expr e, String jvmClassName) throws CompileError { - Member fname = (Member)e.oprand2(); - CtField f = resolver.lookupFieldByJvmName2(jvmClassName, fname, e); - e.setOperator(MEMBER); - e.setOprand1(new Symbol(MemberResolver.jvmToJavaName(jvmClassName))); - fname.setField(f); - return f; - } - - public void atClassObject(Expr expr) throws CompileError { - exprType = CLASS; - arrayDim = 0; - className =jvmJavaLangClass; - } - - public void atArrayLength(Expr expr) throws CompileError { - expr.oprand1().accept(this); - if (arrayDim == 0) - throw new NoFieldException("length", expr); - - exprType = INT; - arrayDim = 0; - } - - public void atArrayRead(ASTree array, ASTree index) - throws CompileError - { - array.accept(this); - int type = exprType; - int dim = arrayDim; - String cname = className; - index.accept(this); - exprType = type; - arrayDim = dim - 1; - className = cname; - } - - private void atPlusPlus(int token, ASTree oprand, Expr expr) - throws CompileError - { - boolean isPost = oprand == null; // ++i or i++? - if (isPost) - oprand = expr.oprand2(); - - if (oprand instanceof Variable) { - Declarator d = ((Variable)oprand).getDeclarator(); - exprType = d.getType(); - arrayDim = d.getArrayDim(); - } - else { - if (oprand instanceof Expr) { - Expr e = (Expr)oprand; - if (e.getOperator() == ARRAY) { - atArrayRead(e.oprand1(), e.oprand2()); - // arrayDim should be 0. - int t = exprType; - if (t == INT || t == BYTE || t == CHAR || t == SHORT) - exprType = INT; - - return; - } - } - - atFieldPlusPlus(oprand); - } - } - - protected void atFieldPlusPlus(ASTree oprand) throws CompileError - { - CtField f = fieldAccess(oprand); - atFieldRead(f); - int t = exprType; - if (t == INT || t == BYTE || t == CHAR || t == SHORT) - exprType = INT; - } - - public void atMember(Member mem) throws CompileError { - atFieldRead(mem); - } - - public void atVariable(Variable v) throws CompileError { - Declarator d = v.getDeclarator(); - exprType = d.getType(); - arrayDim = d.getArrayDim(); - className = d.getClassName(); - } - - public void atKeyword(Keyword k) throws CompileError { - arrayDim = 0; - int token = k.get(); - switch (token) { - case TRUE : - case FALSE : - exprType = BOOLEAN; - break; - case NULL : - exprType = NULL; - break; - case THIS : - case SUPER : - exprType = CLASS; - if (token == THIS) - className = getThisName(); - else - className = getSuperName(); - break; - default : - fatal(); - } - } - - public void atStringL(StringL s) throws CompileError { - exprType = CLASS; - arrayDim = 0; - className = jvmJavaLangString; - } - - public void atIntConst(IntConst i) throws CompileError { - arrayDim = 0; - int type = i.getType(); - if (type == IntConstant || type == CharConstant) - exprType = (type == IntConstant ? INT : CHAR); - else - exprType = LONG; - } - - public void atDoubleConst(DoubleConst d) throws CompileError { - arrayDim = 0; - if (d.getType() == DoubleConstant) - exprType = DOUBLE; - else - exprType = FLOAT; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/ASTList.java b/src/com/wenshuo/agent/javassist/compiler/ast/ASTList.java deleted file mode 100644 index 9c6966d..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/ASTList.java +++ /dev/null @@ -1,160 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * A linked list. - * The right subtree must be an ASTList object or null. - */ -public class ASTList extends ASTree { - private ASTree left; - private ASTList right; - - public ASTList(ASTree _head, ASTList _tail) { - left = _head; - right = _tail; - } - - public ASTList(ASTree _head) { - left = _head; - right = null; - } - - public static ASTList make(ASTree e1, ASTree e2, ASTree e3) { - return new ASTList(e1, new ASTList(e2, new ASTList(e3))); - } - - public ASTree getLeft() { return left; } - - public ASTree getRight() { return right; } - - public void setLeft(ASTree _left) { left = _left; } - - public void setRight(ASTree _right) { - right = (ASTList)_right; - } - - /** - * Returns the car part of the list. - */ - public ASTree head() { return left; } - - public void setHead(ASTree _head) { - left = _head; - } - - /** - * Returns the cdr part of the list. - */ - public ASTList tail() { return right; } - - public void setTail(ASTList _tail) { - right = _tail; - } - - public void accept(Visitor v) throws CompileError { v.atASTList(this); } - - public String toString() { - StringBuffer sbuf = new StringBuffer(); - sbuf.append("(<"); - sbuf.append(getTag()); - sbuf.append('>'); - ASTList list = this; - while (list != null) { - sbuf.append(' '); - ASTree a = list.left; - sbuf.append(a == null ? "" : a.toString()); - list = list.right; - } - - sbuf.append(')'); - return sbuf.toString(); - } - - /** - * Returns the number of the elements in this list. - */ - public int length() { - return length(this); - } - - public static int length(ASTList list) { - if (list == null) - return 0; - - int n = 0; - while (list != null) { - list = list.right; - ++n; - } - - return n; - } - - /** - * Returns a sub list of the list. The sub list begins with the - * n-th element of the list. - * - * @param nth zero or more than zero. - */ - public ASTList sublist(int nth) { - ASTList list = this; - while (nth-- > 0) - list = list.right; - - return list; - } - - /** - * Substitutes newObj for oldObj in the - * list. - */ - public boolean subst(ASTree newObj, ASTree oldObj) { - for (ASTList list = this; list != null; list = list.right) - if (list.left == oldObj) { - list.left = newObj; - return true; - } - - return false; - } - - /** - * Appends an object to a list. - */ - public static ASTList append(ASTList a, ASTree b) { - return concat(a, new ASTList(b)); - } - - /** - * Concatenates two lists. - */ - public static ASTList concat(ASTList a, ASTList b) { - if (a == null) - return b; - else { - ASTList list = a; - while (list.right != null) - list = list.right; - - list.right = b; - return a; - } - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/ASTree.java b/src/com/wenshuo/agent/javassist/compiler/ast/ASTree.java deleted file mode 100644 index b464ec0..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/ASTree.java +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import java.io.Serializable; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Abstract Syntax Tree. An ASTree object represents a node of - * a binary tree. If the node is a leaf node, both getLeft() - * and getRight() returns null. - */ -public abstract class ASTree implements Serializable { - public ASTree getLeft() { return null; } - - public ASTree getRight() { return null; } - - public void setLeft(ASTree _left) {} - - public void setRight(ASTree _right) {} - - /** - * Is a method for the visitor pattern. It calls - * atXXX() on the given visitor, where - * XXX is the class name of the node object. - */ - public abstract void accept(Visitor v) throws CompileError; - - public String toString() { - StringBuffer sbuf = new StringBuffer(); - sbuf.append('<'); - sbuf.append(getTag()); - sbuf.append('>'); - return sbuf.toString(); - } - - /** - * Returns the type of this node. This method is used by - * toString(). - */ - protected String getTag() { - String name = getClass().getName(); - return name.substring(name.lastIndexOf('.') + 1); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java b/src/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java deleted file mode 100644 index aff9430..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java +++ /dev/null @@ -1,32 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Array initializer such as { 1, 2, 3 }. - */ -public class ArrayInit extends ASTList { - public ArrayInit(ASTree firstElement) { - super(firstElement); - } - - public void accept(Visitor v) throws CompileError { v.atArrayInit(this); } - - public String getTag() { return "array"; } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java deleted file mode 100644 index 5e49831..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java +++ /dev/null @@ -1,41 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Assignment expression. - */ -public class AssignExpr extends Expr { - /* operator must be either of: - * =, %=, &=, *=, +=, -=, /=, ^=, |=, <<=, >>=, >>>= - */ - - private AssignExpr(int op, ASTree _head, ASTList _tail) { - super(op, _head, _tail); - } - - public static AssignExpr makeAssign(int op, ASTree oprand1, - ASTree oprand2) { - return new AssignExpr(op, oprand1, new ASTList(oprand2)); - } - - public void accept(Visitor v) throws CompileError { - v.atAssignExpr(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java deleted file mode 100644 index 41005c1..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Binary expression. - * - *

If the operator is +, the right node might be null. - * See TypeChecker.atBinExpr(). - */ -public class BinExpr extends Expr { - /* operator must be either of: - * ||, &&, |, ^, &, ==, !=, <=, >=, <, >, - * <<, >>, >>>, +, -, *, /, % - */ - - private BinExpr(int op, ASTree _head, ASTList _tail) { - super(op, _head, _tail); - } - - public static BinExpr makeBin(int op, ASTree oprand1, ASTree oprand2) { - return new BinExpr(op, oprand1, new ASTList(oprand2)); - } - - public void accept(Visitor v) throws CompileError { v.atBinExpr(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java deleted file mode 100644 index f2b1fb1..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.MemberResolver; - -/** - * Method call expression. - */ -public class CallExpr extends Expr { - private MemberResolver.Method method; // cached result of lookupMethod() - - private CallExpr(ASTree _head, ASTList _tail) { - super(TokenId.CALL, _head, _tail); - method = null; - } - - public void setMethod(MemberResolver.Method m) { - method = m; - } - - public MemberResolver.Method getMethod() { - return method; - } - - public static CallExpr makeCall(ASTree target, ASTree args) { - return new CallExpr(target, new ASTList(args)); - } - - public void accept(Visitor v) throws CompileError { v.atCallExpr(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java deleted file mode 100644 index 60f7b43..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Cast expression. - */ -public class CastExpr extends ASTList implements TokenId { - protected int castType; - protected int arrayDim; - - public CastExpr(ASTList className, int dim, ASTree expr) { - super(className, new ASTList(expr)); - castType = CLASS; - arrayDim = dim; - } - - public CastExpr(int type, int dim, ASTree expr) { - super(null, new ASTList(expr)); - castType = type; - arrayDim = dim; - } - - /* Returns CLASS, BOOLEAN, INT, or ... - */ - public int getType() { return castType; } - - public int getArrayDim() { return arrayDim; } - - public ASTList getClassName() { return (ASTList)getLeft(); } - - public ASTree getOprand() { return getRight().getLeft(); } - - public void setOprand(ASTree t) { getRight().setLeft(t); } - - public String getTag() { return "cast:" + castType + ":" + arrayDim; } - - public void accept(Visitor v) throws CompileError { v.atCastExpr(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java deleted file mode 100644 index f11690f..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java +++ /dev/null @@ -1,44 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Conditional expression. - */ -public class CondExpr extends ASTList { - public CondExpr(ASTree cond, ASTree thenp, ASTree elsep) { - super(cond, new ASTList(thenp, new ASTList(elsep))); - } - - public ASTree condExpr() { return head(); } - - public void setCond(ASTree t) { setHead(t); } - - public ASTree thenExpr() { return tail().head(); } - - public void setThen(ASTree t) { tail().setHead(t); } - - public ASTree elseExpr() { return tail().tail().head(); } - - public void setElse(ASTree t) { tail().tail().setHead(t); } - - public String getTag() { return "?:"; } - - public void accept(Visitor v) throws CompileError { v.atCondExpr(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Declarator.java b/src/com/wenshuo/agent/javassist/compiler/ast/Declarator.java deleted file mode 100644 index be7c1cd..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Declarator.java +++ /dev/null @@ -1,128 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Variable declarator. - */ -public class Declarator extends ASTList implements TokenId { - protected int varType; - protected int arrayDim; - protected int localVar; - protected String qualifiedClass; // JVM-internal representation - - public Declarator(int type, int dim) { - super(null); - varType = type; - arrayDim = dim; - localVar = -1; - qualifiedClass = null; - } - - public Declarator(ASTList className, int dim) { - super(null); - varType = CLASS; - arrayDim = dim; - localVar = -1; - qualifiedClass = astToClassName(className, '/'); - } - - /* For declaring a pre-defined? local variable. - */ - public Declarator(int type, String jvmClassName, int dim, - int var, Symbol sym) { - super(null); - varType = type; - arrayDim = dim; - localVar = var; - qualifiedClass = jvmClassName; - setLeft(sym); - append(this, null); // initializer - } - - public Declarator make(Symbol sym, int dim, ASTree init) { - Declarator d = new Declarator(this.varType, this.arrayDim + dim); - d.qualifiedClass = this.qualifiedClass; - d.setLeft(sym); - append(d, init); - return d; - } - - /* Returns CLASS, BOOLEAN, BYTE, CHAR, SHORT, INT, LONG, FLOAT, - * or DOUBLE (or VOID) - */ - public int getType() { return varType; } - - public int getArrayDim() { return arrayDim; } - - public void addArrayDim(int d) { arrayDim += d; } - - public String getClassName() { return qualifiedClass; } - - public void setClassName(String s) { qualifiedClass = s; } - - public Symbol getVariable() { return (Symbol)getLeft(); } - - public void setVariable(Symbol sym) { setLeft(sym); } - - public ASTree getInitializer() { - ASTList t = tail(); - if (t != null) - return t.head(); - else - return null; - } - - public void setLocalVar(int n) { localVar = n; } - - public int getLocalVar() { return localVar; } - - public String getTag() { return "decl"; } - - public void accept(Visitor v) throws CompileError { - v.atDeclarator(this); - } - - public static String astToClassName(ASTList name, char sep) { - if (name == null) - return null; - - StringBuffer sbuf = new StringBuffer(); - astToClassName(sbuf, name, sep); - return sbuf.toString(); - } - - private static void astToClassName(StringBuffer sbuf, ASTList name, - char sep) { - for (;;) { - ASTree h = name.head(); - if (h instanceof Symbol) - sbuf.append(((Symbol)h).get()); - else if (h instanceof ASTList) - astToClassName(sbuf, (ASTList)h, sep); - - name = name.tail(); - if (name == null) - break; - - sbuf.append(sep); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java b/src/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java deleted file mode 100644 index 777e3cf..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.compiler.TokenId; - -/** - * Double constant. - */ -public class DoubleConst extends ASTree { - protected double value; - protected int type; - - public DoubleConst(double v, int tokenId) { value = v; type = tokenId; } - - public double get() { return value; } - - public void set(double v) { value = v; } - - /* Returns DoubleConstant or FloatConstant - */ - public int getType() { return type; } - - public String toString() { return Double.toString(value); } - - public void accept(Visitor v) throws CompileError { - v.atDoubleConst(this); - } - - public ASTree compute(int op, ASTree right) { - if (right instanceof IntConst) - return compute0(op, (IntConst)right); - else if (right instanceof DoubleConst) - return compute0(op, (DoubleConst)right); - else - return null; - } - - private DoubleConst compute0(int op, DoubleConst right) { - int newType; - if (this.type == TokenId.DoubleConstant - || right.type == TokenId.DoubleConstant) - newType = TokenId.DoubleConstant; - else - newType = TokenId.FloatConstant; - - return compute(op, this.value, right.value, newType); - } - - private DoubleConst compute0(int op, IntConst right) { - return compute(op, this.value, (double)right.value, this.type); - } - - private static DoubleConst compute(int op, double value1, double value2, - int newType) - { - double newValue; - switch (op) { - case '+' : - newValue = value1 + value2; - break; - case '-' : - newValue = value1 - value2; - break; - case '*' : - newValue = value1 * value2; - break; - case '/' : - newValue = value1 / value2; - break; - case '%' : - newValue = value1 % value2; - break; - default : - return null; - } - - return new DoubleConst(newValue, newType); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Expr.java b/src/com/wenshuo/agent/javassist/compiler/ast/Expr.java deleted file mode 100644 index d49ca3e..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Expr.java +++ /dev/null @@ -1,85 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Expression. - */ -public class Expr extends ASTList implements TokenId { - /* operator must be either of: - * (unary) +, (unary) -, ++, --, !, ~, - * ARRAY, . (dot), MEMBER (static member access). - * Otherwise, the object should be an instance of a subclass. - */ - - protected int operatorId; - - Expr(int op, ASTree _head, ASTList _tail) { - super(_head, _tail); - operatorId = op; - } - - Expr(int op, ASTree _head) { - super(_head); - operatorId = op; - } - - public static Expr make(int op, ASTree oprand1, ASTree oprand2) { - return new Expr(op, oprand1, new ASTList(oprand2)); - } - - public static Expr make(int op, ASTree oprand1) { - return new Expr(op, oprand1); - } - - public int getOperator() { return operatorId; } - - public void setOperator(int op) { operatorId = op; } - - public ASTree oprand1() { return getLeft(); } - - public void setOprand1(ASTree expr) { - setLeft(expr); - } - - public ASTree oprand2() { return getRight().getLeft(); } - - public void setOprand2(ASTree expr) { - getRight().setLeft(expr); - } - - public void accept(Visitor v) throws CompileError { v.atExpr(this); } - - public String getName() { - int id = operatorId; - if (id < 128) - return String.valueOf((char)id); - else if (NEQ <= id && id <= ARSHIFT_E) - return opNames[id - NEQ]; - else if (id == INSTANCEOF) - return "instanceof"; - else - return String.valueOf(id); - } - - protected String getTag() { - return "op:" + getName(); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java b/src/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java deleted file mode 100644 index 968a97b..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java +++ /dev/null @@ -1,35 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -public class FieldDecl extends ASTList { - public FieldDecl(ASTree _head, ASTList _tail) { - super(_head, _tail); - } - - public ASTList getModifiers() { return (ASTList)getLeft(); } - - public Declarator getDeclarator() { return (Declarator)tail().head(); } - - public ASTree getInit() { return (ASTree)sublist(2).head(); } - - public void accept(Visitor v) throws CompileError { - v.atFieldDecl(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java deleted file mode 100644 index e7fa6d3..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Instanceof expression. - */ -public class InstanceOfExpr extends CastExpr { - public InstanceOfExpr(ASTList className, int dim, ASTree expr) { - super(className, dim, expr); - } - - public InstanceOfExpr(int type, int dim, ASTree expr) { - super(type, dim, expr); - } - - public String getTag() { - return "instanceof:" + castType + ":" + arrayDim; - } - - public void accept(Visitor v) throws CompileError { - v.atInstanceOfExpr(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/IntConst.java b/src/com/wenshuo/agent/javassist/compiler/ast/IntConst.java deleted file mode 100644 index b4d83ca..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/IntConst.java +++ /dev/null @@ -1,139 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.compiler.TokenId; - -/** - * Integer constant. - */ -public class IntConst extends ASTree { - protected long value; - protected int type; - - public IntConst(long v, int tokenId) { value = v; type = tokenId; } - - public long get() { return value; } - - public void set(long v) { value = v; } - - /* Returns IntConstant, CharConstant, or LongConstant. - */ - public int getType() { return type; } - - public String toString() { return Long.toString(value); } - - public void accept(Visitor v) throws CompileError { - v.atIntConst(this); - } - - public ASTree compute(int op, ASTree right) { - if (right instanceof IntConst) - return compute0(op, (IntConst)right); - else if (right instanceof DoubleConst) - return compute0(op, (DoubleConst)right); - else - return null; - } - - private IntConst compute0(int op, IntConst right) { - int type1 = this.type; - int type2 = right.type; - int newType; - if (type1 == TokenId.LongConstant || type2 == TokenId.LongConstant) - newType = TokenId.LongConstant; - else if (type1 == TokenId.CharConstant - && type2 == TokenId.CharConstant) - newType = TokenId.CharConstant; - else - newType = TokenId.IntConstant; - - long value1 = this.value; - long value2 = right.value; - long newValue; - switch (op) { - case '+' : - newValue = value1 + value2; - break; - case '-' : - newValue = value1 - value2; - break; - case '*' : - newValue = value1 * value2; - break; - case '/' : - newValue = value1 / value2; - break; - case '%' : - newValue = value1 % value2; - break; - case '|' : - newValue = value1 | value2; - break; - case '^' : - newValue = value1 ^ value2; - break; - case '&' : - newValue = value1 & value2; - break; - case TokenId.LSHIFT : - newValue = value << (int)value2; - newType = type1; - break; - case TokenId.RSHIFT : - newValue = value >> (int)value2; - newType = type1; - break; - case TokenId.ARSHIFT : - newValue = value >>> (int)value2; - newType = type1; - break; - default : - return null; - } - - return new IntConst(newValue, newType); - } - - private DoubleConst compute0(int op, DoubleConst right) { - double value1 = (double)this.value; - double value2 = right.value; - double newValue; - switch (op) { - case '+' : - newValue = value1 + value2; - break; - case '-' : - newValue = value1 - value2; - break; - case '*' : - newValue = value1 * value2; - break; - case '/' : - newValue = value1 / value2; - break; - case '%' : - newValue = value1 % value2; - break; - default : - return null; - } - - return new DoubleConst(newValue, right.type); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Keyword.java b/src/com/wenshuo/agent/javassist/compiler/ast/Keyword.java deleted file mode 100644 index d1b63dd..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Keyword.java +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Keyword. - */ -public class Keyword extends ASTree { - protected int tokenId; - - public Keyword(int token) { - tokenId = token; - } - - public int get() { return tokenId; } - - public String toString() { return "id:" + tokenId; } - - public void accept(Visitor v) throws CompileError { v.atKeyword(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Member.java b/src/com/wenshuo/agent/javassist/compiler/ast/Member.java deleted file mode 100644 index cc5c4d1..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Member.java +++ /dev/null @@ -1,40 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; -import com.wenshuo.agent.javassist.CtField; - -/** - * Member name. - */ -public class Member extends Symbol { - // cache maintained by fieldAccess() in TypeChecker. - // this is used to obtain the value of a static final field. - private CtField field; - - public Member(String name) { - super(name); - field = null; - } - - public void setField(CtField f) { field = f; } - - public CtField getField() { return field; } - - public void accept(Visitor v) throws CompileError { v.atMember(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java b/src/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java deleted file mode 100644 index a80e374..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java +++ /dev/null @@ -1,46 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -public class MethodDecl extends ASTList { - public static final String initName = ""; - - public MethodDecl(ASTree _head, ASTList _tail) { - super(_head, _tail); - } - - public boolean isConstructor() { - Symbol sym = getReturn().getVariable(); - return sym != null && initName.equals(sym.get()); - } - - public ASTList getModifiers() { return (ASTList)getLeft(); } - - public Declarator getReturn() { return (Declarator)tail().head(); } - - public ASTList getParams() { return (ASTList)sublist(2).head(); } - - public ASTList getThrows() { return (ASTList)sublist(3).head(); } - - public Stmnt getBody() { return (Stmnt)sublist(4).head(); } - - public void accept(Visitor v) throws CompileError { - v.atMethodDecl(this); - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java b/src/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java deleted file mode 100644 index 4b064f2..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * New Expression. - */ -public class NewExpr extends ASTList implements TokenId { - protected boolean newArray; - protected int arrayType; - - public NewExpr(ASTList className, ASTList args) { - super(className, new ASTList(args)); - newArray = false; - arrayType = CLASS; - } - - public NewExpr(int type, ASTList arraySize, ArrayInit init) { - super(null, new ASTList(arraySize)); - newArray = true; - arrayType = type; - if (init != null) - append(this, init); - } - - public static NewExpr makeObjectArray(ASTList className, - ASTList arraySize, ArrayInit init) { - NewExpr e = new NewExpr(className, arraySize); - e.newArray = true; - if (init != null) - append(e, init); - - return e; - } - - public boolean isArray() { return newArray; } - - /* TokenId.CLASS, TokenId.INT, ... - */ - public int getArrayType() { return arrayType; } - - public ASTList getClassName() { return (ASTList)getLeft(); } - - public ASTList getArguments() { return (ASTList)getRight().getLeft(); } - - public ASTList getArraySize() { return getArguments(); } - - public ArrayInit getInitializer() { - ASTree t = getRight().getRight(); - if (t == null) - return null; - else - return (ArrayInit)t.getLeft(); - } - - public void accept(Visitor v) throws CompileError { v.atNewExpr(this); } - - protected String getTag() { - return newArray ? "new[]" : "new"; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Pair.java b/src/com/wenshuo/agent/javassist/compiler/ast/Pair.java deleted file mode 100644 index 56cb3e6..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Pair.java +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * A node of a a binary tree. This class provides concrete methods - * overriding abstract methods in ASTree. - */ -public class Pair extends ASTree { - protected ASTree left, right; - - public Pair(ASTree _left, ASTree _right) { - left = _left; - right = _right; - } - - public void accept(Visitor v) throws CompileError { v.atPair(this); } - - public String toString() { - StringBuffer sbuf = new StringBuffer(); - sbuf.append("( "); - sbuf.append(left == null ? "" : left.toString()); - sbuf.append(" . "); - sbuf.append(right == null ? "" : right.toString()); - sbuf.append(')'); - return sbuf.toString(); - } - - public ASTree getLeft() { return left; } - - public ASTree getRight() { return right; } - - public void setLeft(ASTree _left) { left = _left; } - - public void setRight(ASTree _right) { right = _right; } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java b/src/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java deleted file mode 100644 index 0d81286..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.TokenId; -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Statement. - */ -public class Stmnt extends ASTList implements TokenId { - protected int operatorId; - - public Stmnt(int op, ASTree _head, ASTList _tail) { - super(_head, _tail); - operatorId = op; - } - - public Stmnt(int op, ASTree _head) { - super(_head); - operatorId = op; - } - - public Stmnt(int op) { - this(op, null); - } - - public static Stmnt make(int op, ASTree oprand1, ASTree oprand2) { - return new Stmnt(op, oprand1, new ASTList(oprand2)); - } - - public static Stmnt make(int op, ASTree op1, ASTree op2, ASTree op3) { - return new Stmnt(op, op1, new ASTList(op2, new ASTList(op3))); - } - - public void accept(Visitor v) throws CompileError { v.atStmnt(this); } - - public int getOperator() { return operatorId; } - - protected String getTag() { - if (operatorId < 128) - return "stmnt:" + (char)operatorId; - else - return "stmnt:" + operatorId; - } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/StringL.java b/src/com/wenshuo/agent/javassist/compiler/ast/StringL.java deleted file mode 100644 index d7c43c0..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/StringL.java +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * String literal. - */ -public class StringL extends ASTree { - protected String text; - - public StringL(String t) { - text = t; - } - - public String get() { return text; } - - public String toString() { return "\"" + text + "\""; } - - public void accept(Visitor v) throws CompileError { v.atStringL(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Symbol.java b/src/com/wenshuo/agent/javassist/compiler/ast/Symbol.java deleted file mode 100644 index b305cbd..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Symbol.java +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Identifier. - */ -public class Symbol extends ASTree { - protected String identifier; - - public Symbol(String sym) { - identifier = sym; - } - - public String get() { return identifier; } - - public String toString() { return identifier; } - - public void accept(Visitor v) throws CompileError { v.atSymbol(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Variable.java b/src/com/wenshuo/agent/javassist/compiler/ast/Variable.java deleted file mode 100644 index 0b7741a..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Variable.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * Variable. - */ -public class Variable extends Symbol { - protected Declarator declarator; - - public Variable(String sym, Declarator d) { - super(sym); - declarator = d; - } - - public Declarator getDeclarator() { return declarator; } - - public String toString() { - return identifier + ":" + declarator.getType(); - } - - public void accept(Visitor v) throws CompileError { v.atVariable(this); } -} diff --git a/src/com/wenshuo/agent/javassist/compiler/ast/Visitor.java b/src/com/wenshuo/agent/javassist/compiler/ast/Visitor.java deleted file mode 100644 index e4c6e44..0000000 --- a/src/com/wenshuo/agent/javassist/compiler/ast/Visitor.java +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.compiler.ast; - -import com.wenshuo.agent.javassist.compiler.CompileError; - -/** - * The visitor pattern. - * - * @see ASTree#accept(Visitor) - */ -public class Visitor { - public void atASTList(ASTList n) throws CompileError {} - public void atPair(Pair n) throws CompileError {} - - public void atFieldDecl(FieldDecl n) throws CompileError {} - public void atMethodDecl(MethodDecl n) throws CompileError {} - public void atStmnt(Stmnt n) throws CompileError {} - public void atDeclarator(Declarator n) throws CompileError {} - - public void atAssignExpr(AssignExpr n) throws CompileError {} - public void atCondExpr(CondExpr n) throws CompileError {} - public void atBinExpr(BinExpr n) throws CompileError {} - public void atExpr(Expr n) throws CompileError {} - public void atCallExpr(CallExpr n) throws CompileError {} - public void atCastExpr(CastExpr n) throws CompileError {} - public void atInstanceOfExpr(InstanceOfExpr n) throws CompileError {} - public void atNewExpr(NewExpr n) throws CompileError {} - - public void atSymbol(Symbol n) throws CompileError {} - public void atMember(Member n) throws CompileError {} - public void atVariable(Variable n) throws CompileError {} - public void atKeyword(Keyword n) throws CompileError {} - public void atStringL(StringL n) throws CompileError {} - public void atIntConst(IntConst n) throws CompileError {} - public void atDoubleConst(DoubleConst n) throws CompileError {} - public void atArrayInit(ArrayInit n) throws CompileError {} -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java b/src/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java deleted file mode 100644 index 3942bd7..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java +++ /dev/null @@ -1,270 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.CodeConverter.ArrayAccessReplacementMethodNames; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.Descriptor; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.analysis.Analyzer; -import com.wenshuo.agent.javassist.bytecode.analysis.Frame; - -/** - * A transformer which replaces array access with static method invocations. - * - * @author Kabir Khan - * @author Jason T. Greene - * @version $Revision: 1.8 $ - */ -public final class TransformAccessArrayField extends Transformer { - private final String methodClassname; - private final ArrayAccessReplacementMethodNames names; - private Frame[] frames; - private int offset; - - public TransformAccessArrayField(Transformer next, String methodClassname, - ArrayAccessReplacementMethodNames names) throws NotFoundException { - super(next); - this.methodClassname = methodClassname; - this.names = names; - - } - - public void initialize(ConstPool cp, CtClass clazz, MethodInfo minfo) throws CannotCompileException { - /* - * This transformer must be isolated from other transformers, since some - * of them affect the local variable and stack maximums without updating - * the code attribute to reflect the changes. This screws up the - * data-flow analyzer, since it relies on consistent code state. Even - * if the attribute values were updated correctly, we would have to - * detect it, and redo analysis, which is not cheap. Instead, we are - * better off doing all changes in initialize() before everyone else has - * a chance to muck things up. - */ - CodeIterator iterator = minfo.getCodeAttribute().iterator(); - while (iterator.hasNext()) { - try { - int pos = iterator.next(); - int c = iterator.byteAt(pos); - - if (c == AALOAD) - initFrames(clazz, minfo); - - if (c == AALOAD || c == BALOAD || c == CALOAD || c == DALOAD - || c == FALOAD || c == IALOAD || c == LALOAD - || c == SALOAD) { - pos = replace(cp, iterator, pos, c, getLoadReplacementSignature(c)); - } else if (c == AASTORE || c == BASTORE || c == CASTORE - || c == DASTORE || c == FASTORE || c == IASTORE - || c == LASTORE || c == SASTORE) { - pos = replace(cp, iterator, pos, c, getStoreReplacementSignature(c)); - } - - } catch (Exception e) { - throw new CannotCompileException(e); - } - } - } - - public void clean() { - frames = null; - offset = -1; - } - - public int transform(CtClass tclazz, int pos, CodeIterator iterator, - ConstPool cp) throws BadBytecode { - // Do nothing, see above comment - return pos; - } - - private Frame getFrame(int pos) throws BadBytecode { - return frames[pos - offset]; // Adjust pos - } - - private void initFrames(CtClass clazz, MethodInfo minfo) throws BadBytecode { - if (frames == null) { - frames = ((new Analyzer())).analyze(clazz, minfo); - offset = 0; // start tracking changes - } - } - - private int updatePos(int pos, int increment) { - if (offset > -1) - offset += increment; - - return pos + increment; - } - - private String getTopType(int pos) throws BadBytecode { - Frame frame = getFrame(pos); - if (frame == null) - return null; - - CtClass clazz = frame.peek().getCtClass(); - return clazz != null ? Descriptor.toJvmName(clazz) : null; - } - - private int replace(ConstPool cp, CodeIterator iterator, int pos, - int opcode, String signature) throws BadBytecode { - String castType = null; - String methodName = getMethodName(opcode); - if (methodName != null) { - // See if the object must be cast - if (opcode == AALOAD) { - castType = getTopType(iterator.lookAhead()); - // Do not replace an AALOAD instruction that we do not have a type for - // This happens when the state is guaranteed to be null (Type.UNINIT) - // So we don't really care about this case. - if (castType == null) - return pos; - if ("java/lang/Object".equals(castType)) - castType = null; - } - - // The gap may include extra padding - // Write a nop in case the padding pushes the instruction forward - iterator.writeByte(NOP, pos); - CodeIterator.Gap gap - = iterator.insertGapAt(pos, castType != null ? 5 : 2, false); - pos = gap.position; - int mi = cp.addClassInfo(methodClassname); - int methodref = cp.addMethodrefInfo(mi, methodName, signature); - iterator.writeByte(INVOKESTATIC, pos); - iterator.write16bit(methodref, pos + 1); - - if (castType != null) { - int index = cp.addClassInfo(castType); - iterator.writeByte(CHECKCAST, pos + 3); - iterator.write16bit(index, pos + 4); - } - - pos = updatePos(pos, gap.length); - } - - return pos; - } - - private String getMethodName(int opcode) { - String methodName = null; - switch (opcode) { - case AALOAD: - methodName = names.objectRead(); - break; - case BALOAD: - methodName = names.byteOrBooleanRead(); - break; - case CALOAD: - methodName = names.charRead(); - break; - case DALOAD: - methodName = names.doubleRead(); - break; - case FALOAD: - methodName = names.floatRead(); - break; - case IALOAD: - methodName = names.intRead(); - break; - case SALOAD: - methodName = names.shortRead(); - break; - case LALOAD: - methodName = names.longRead(); - break; - case AASTORE: - methodName = names.objectWrite(); - break; - case BASTORE: - methodName = names.byteOrBooleanWrite(); - break; - case CASTORE: - methodName = names.charWrite(); - break; - case DASTORE: - methodName = names.doubleWrite(); - break; - case FASTORE: - methodName = names.floatWrite(); - break; - case IASTORE: - methodName = names.intWrite(); - break; - case SASTORE: - methodName = names.shortWrite(); - break; - case LASTORE: - methodName = names.longWrite(); - break; - } - - if (methodName.equals("")) - methodName = null; - - return methodName; - } - - private String getLoadReplacementSignature(int opcode) throws BadBytecode { - switch (opcode) { - case AALOAD: - return "(Ljava/lang/Object;I)Ljava/lang/Object;"; - case BALOAD: - return "(Ljava/lang/Object;I)B"; - case CALOAD: - return "(Ljava/lang/Object;I)C"; - case DALOAD: - return "(Ljava/lang/Object;I)D"; - case FALOAD: - return "(Ljava/lang/Object;I)F"; - case IALOAD: - return "(Ljava/lang/Object;I)I"; - case SALOAD: - return "(Ljava/lang/Object;I)S"; - case LALOAD: - return "(Ljava/lang/Object;I)J"; - } - - throw new BadBytecode(opcode); - } - - private String getStoreReplacementSignature(int opcode) throws BadBytecode { - switch (opcode) { - case AASTORE: - return "(Ljava/lang/Object;ILjava/lang/Object;)V"; - case BASTORE: - return "(Ljava/lang/Object;IB)V"; - case CASTORE: - return "(Ljava/lang/Object;IC)V"; - case DASTORE: - return "(Ljava/lang/Object;ID)V"; - case FASTORE: - return "(Ljava/lang/Object;IF)V"; - case IASTORE: - return "(Ljava/lang/Object;II)V"; - case SASTORE: - return "(Ljava/lang/Object;IS)V"; - case LASTORE: - return "(Ljava/lang/Object;IJ)V"; - } - - throw new BadBytecode(opcode); - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformAfter.java b/src/com/wenshuo/agent/javassist/convert/TransformAfter.java deleted file mode 100644 index ebe8c61..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformAfter.java +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.*; - -public class TransformAfter extends TransformBefore { - public TransformAfter(Transformer next, - CtMethod origMethod, CtMethod afterMethod) - throws NotFoundException - { - super(next, origMethod, afterMethod); - } - - protected int match2(int pos, CodeIterator iterator) throws BadBytecode { - iterator.move(pos); - iterator.insert(saveCode); - iterator.insert(loadCode); - int p = iterator.insertGap(3); - iterator.setMark(p); - iterator.insert(loadCode); - pos = iterator.next(); - p = iterator.getMark(); - iterator.writeByte(iterator.byteAt(pos), p); - iterator.write16bit(iterator.u16bitAt(pos + 1), p + 1); - iterator.writeByte(INVOKESTATIC, pos); - iterator.write16bit(newIndex, pos + 1); - iterator.move(p); - return iterator.next(); - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformBefore.java b/src/com/wenshuo/agent/javassist/convert/TransformBefore.java deleted file mode 100644 index ff75939..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformBefore.java +++ /dev/null @@ -1,108 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.*; - -public class TransformBefore extends TransformCall { - protected CtClass[] parameterTypes; - protected int locals; - protected int maxLocals; - protected byte[] saveCode, loadCode; - - public TransformBefore(Transformer next, - CtMethod origMethod, CtMethod beforeMethod) - throws NotFoundException - { - super(next, origMethod, beforeMethod); - - // override - methodDescriptor = origMethod.getMethodInfo2().getDescriptor(); - - parameterTypes = origMethod.getParameterTypes(); - locals = 0; - maxLocals = 0; - saveCode = loadCode = null; - } - - public void initialize(ConstPool cp, CodeAttribute attr) { - super.initialize(cp, attr); - locals = 0; - maxLocals = attr.getMaxLocals(); - saveCode = loadCode = null; - } - - protected int match(int c, int pos, CodeIterator iterator, - int typedesc, ConstPool cp) throws BadBytecode - { - if (newIndex == 0) { - String desc = Descriptor.ofParameters(parameterTypes) + 'V'; - desc = Descriptor.insertParameter(classname, desc); - int nt = cp.addNameAndTypeInfo(newMethodname, desc); - int ci = cp.addClassInfo(newClassname); - newIndex = cp.addMethodrefInfo(ci, nt); - constPool = cp; - } - - if (saveCode == null) - makeCode(parameterTypes, cp); - - return match2(pos, iterator); - } - - protected int match2(int pos, CodeIterator iterator) throws BadBytecode { - iterator.move(pos); - iterator.insert(saveCode); - iterator.insert(loadCode); - int p = iterator.insertGap(3); - iterator.writeByte(INVOKESTATIC, p); - iterator.write16bit(newIndex, p + 1); - iterator.insert(loadCode); - return iterator.next(); - } - - public int extraLocals() { return locals; } - - protected void makeCode(CtClass[] paramTypes, ConstPool cp) { - Bytecode save = new Bytecode(cp, 0, 0); - Bytecode load = new Bytecode(cp, 0, 0); - - int var = maxLocals; - int len = (paramTypes == null) ? 0 : paramTypes.length; - load.addAload(var); - makeCode2(save, load, 0, len, paramTypes, var + 1); - save.addAstore(var); - - saveCode = save.get(); - loadCode = load.get(); - } - - private void makeCode2(Bytecode save, Bytecode load, - int i, int n, CtClass[] paramTypes, int var) - { - if (i < n) { - int size = load.addLoad(var, paramTypes[i]); - makeCode2(save, load, i + 1, n, paramTypes, var + size); - save.addStore(var, paramTypes[i]); - } - else - locals = var - maxLocals; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformCall.java b/src/com/wenshuo/agent/javassist/convert/TransformCall.java deleted file mode 100644 index 317bda3..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformCall.java +++ /dev/null @@ -1,130 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.*; - -public class TransformCall extends Transformer { - protected String classname, methodname, methodDescriptor; - protected String newClassname, newMethodname; - protected boolean newMethodIsPrivate; - - /* cache */ - protected int newIndex; - protected ConstPool constPool; - - public TransformCall(Transformer next, CtMethod origMethod, - CtMethod substMethod) - { - this(next, origMethod.getName(), substMethod); - classname = origMethod.getDeclaringClass().getName(); - } - - public TransformCall(Transformer next, String oldMethodName, - CtMethod substMethod) - { - super(next); - methodname = oldMethodName; - methodDescriptor = substMethod.getMethodInfo2().getDescriptor(); - classname = newClassname = substMethod.getDeclaringClass().getName(); - newMethodname = substMethod.getName(); - constPool = null; - newMethodIsPrivate = Modifier.isPrivate(substMethod.getModifiers()); - } - - public void initialize(ConstPool cp, CodeAttribute attr) { - if (constPool != cp) - newIndex = 0; - } - - /** - * Modify INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC and INVOKEVIRTUAL - * so that a different method is invoked. The class name in the operand - * of these instructions might be a subclass of the target class specified - * by classname. This method transforms the instruction - * in that case unless the subclass overrides the target method. - */ - public int transform(CtClass clazz, int pos, CodeIterator iterator, - ConstPool cp) throws BadBytecode - { - int c = iterator.byteAt(pos); - if (c == INVOKEINTERFACE || c == INVOKESPECIAL - || c == INVOKESTATIC || c == INVOKEVIRTUAL) { - int index = iterator.u16bitAt(pos + 1); - String cname = cp.eqMember(methodname, methodDescriptor, index); - if (cname != null && matchClass(cname, clazz.getClassPool())) { - int ntinfo = cp.getMemberNameAndType(index); - pos = match(c, pos, iterator, - cp.getNameAndTypeDescriptor(ntinfo), cp); - } - } - - return pos; - } - - private boolean matchClass(String name, ClassPool pool) { - if (classname.equals(name)) - return true; - - try { - CtClass clazz = pool.get(name); - CtClass declClazz = pool.get(classname); - if (clazz.subtypeOf(declClazz)) - try { - CtMethod m = clazz.getMethod(methodname, methodDescriptor); - return m.getDeclaringClass().getName().equals(classname); - } - catch (NotFoundException e) { - // maybe the original method has been removed. - return true; - } - } - catch (NotFoundException e) { - return false; - } - - return false; - } - - protected int match(int c, int pos, CodeIterator iterator, - int typedesc, ConstPool cp) throws BadBytecode - { - if (newIndex == 0) { - int nt = cp.addNameAndTypeInfo(cp.addUtf8Info(newMethodname), - typedesc); - int ci = cp.addClassInfo(newClassname); - if (c == INVOKEINTERFACE) - newIndex = cp.addInterfaceMethodrefInfo(ci, nt); - else { - if (newMethodIsPrivate && c == INVOKEVIRTUAL) - iterator.writeByte(INVOKESPECIAL, pos); - - newIndex = cp.addMethodrefInfo(ci, nt); - } - - constPool = cp; - } - - iterator.write16bit(newIndex, pos + 1); - return pos; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java b/src/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java deleted file mode 100644 index 08ed468..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java +++ /dev/null @@ -1,82 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtField; -import com.wenshuo.agent.javassist.Modifier; - -final public class TransformFieldAccess extends Transformer { - private String newClassname, newFieldname; - private String fieldname; - private CtClass fieldClass; - private boolean isPrivate; - - /* cache */ - private int newIndex; - private ConstPool constPool; - - public TransformFieldAccess(Transformer next, CtField field, - String newClassname, String newFieldname) - { - super(next); - this.fieldClass = field.getDeclaringClass(); - this.fieldname = field.getName(); - this.isPrivate = Modifier.isPrivate(field.getModifiers()); - this.newClassname = newClassname; - this.newFieldname = newFieldname; - this.constPool = null; - } - - public void initialize(ConstPool cp, CodeAttribute attr) { - if (constPool != cp) - newIndex = 0; - } - - /** - * Modify GETFIELD, GETSTATIC, PUTFIELD, and PUTSTATIC so that - * a different field is accessed. The new field must be declared - * in a superclass of the class in which the original field is - * declared. - */ - public int transform(CtClass clazz, int pos, - CodeIterator iterator, ConstPool cp) - { - int c = iterator.byteAt(pos); - if (c == GETFIELD || c == GETSTATIC - || c == PUTFIELD || c == PUTSTATIC) { - int index = iterator.u16bitAt(pos + 1); - String typedesc - = TransformReadField.isField(clazz.getClassPool(), cp, - fieldClass, fieldname, isPrivate, index); - if (typedesc != null) { - if (newIndex == 0) { - int nt = cp.addNameAndTypeInfo(newFieldname, - typedesc); - newIndex = cp.addFieldrefInfo( - cp.addClassInfo(newClassname), nt); - constPool = cp; - } - - iterator.write16bit(newIndex, pos + 1); - } - } - - return pos; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformNew.java b/src/com/wenshuo/agent/javassist/convert/TransformNew.java deleted file mode 100644 index a85d750..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformNew.java +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CannotCompileException; - -final public class TransformNew extends Transformer { - private int nested; - private String classname, trapClass, trapMethod; - - public TransformNew(Transformer next, - String classname, String trapClass, String trapMethod) { - super(next); - this.classname = classname; - this.trapClass = trapClass; - this.trapMethod = trapMethod; - } - - public void initialize(ConstPool cp, CodeAttribute attr) { - nested = 0; - } - - /** - * Replace a sequence of - * NEW classname - * DUP - * ... - * INVOKESPECIAL - * with - * NOP - * NOP - * ... - * INVOKESTATIC trapMethod in trapClass - */ - public int transform(CtClass clazz, int pos, CodeIterator iterator, - ConstPool cp) throws CannotCompileException - { - int index; - int c = iterator.byteAt(pos); - if (c == NEW) { - index = iterator.u16bitAt(pos + 1); - if (cp.getClassInfo(index).equals(classname)) { - if (iterator.byteAt(pos + 3) != DUP) - throw new CannotCompileException( - "NEW followed by no DUP was found"); - - iterator.writeByte(NOP, pos); - iterator.writeByte(NOP, pos + 1); - iterator.writeByte(NOP, pos + 2); - iterator.writeByte(NOP, pos + 3); - ++nested; - - StackMapTable smt - = (StackMapTable)iterator.get().getAttribute(StackMapTable.tag); - if (smt != null) - smt.removeNew(pos); - - StackMap sm - = (StackMap)iterator.get().getAttribute(StackMap.tag); - if (sm != null) - sm.removeNew(pos); - } - } - else if (c == INVOKESPECIAL) { - index = iterator.u16bitAt(pos + 1); - int typedesc = cp.isConstructor(classname, index); - if (typedesc != 0 && nested > 0) { - int methodref = computeMethodref(typedesc, cp); - iterator.writeByte(INVOKESTATIC, pos); - iterator.write16bit(methodref, pos + 1); - --nested; - } - } - - return pos; - } - - private int computeMethodref(int typedesc, ConstPool cp) { - int classIndex = cp.addClassInfo(trapClass); - int mnameIndex = cp.addUtf8Info(trapMethod); - typedesc = cp.addUtf8Info( - Descriptor.changeReturnType(classname, - cp.getUtf8Info(typedesc))); - return cp.addMethodrefInfo(classIndex, - cp.addNameAndTypeInfo(mnameIndex, typedesc)); - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformNewClass.java b/src/com/wenshuo/agent/javassist/convert/TransformNewClass.java deleted file mode 100644 index 513b8ef..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformNewClass.java +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CannotCompileException; - -final public class TransformNewClass extends Transformer { - private int nested; - private String classname, newClassName; - private int newClassIndex, newMethodNTIndex, newMethodIndex; - - public TransformNewClass(Transformer next, - String classname, String newClassName) { - super(next); - this.classname = classname; - this.newClassName = newClassName; - } - - public void initialize(ConstPool cp, CodeAttribute attr) { - nested = 0; - newClassIndex = newMethodNTIndex = newMethodIndex = 0; - } - - /** - * Modifies a sequence of - * NEW classname - * DUP - * ... - * INVOKESPECIAL classname:method - */ - public int transform(CtClass clazz, int pos, CodeIterator iterator, - ConstPool cp) throws CannotCompileException - { - int index; - int c = iterator.byteAt(pos); - if (c == NEW) { - index = iterator.u16bitAt(pos + 1); - if (cp.getClassInfo(index).equals(classname)) { - if (iterator.byteAt(pos + 3) != DUP) - throw new CannotCompileException( - "NEW followed by no DUP was found"); - - if (newClassIndex == 0) - newClassIndex = cp.addClassInfo(newClassName); - - iterator.write16bit(newClassIndex, pos + 1); - ++nested; - } - } - else if (c == INVOKESPECIAL) { - index = iterator.u16bitAt(pos + 1); - int typedesc = cp.isConstructor(classname, index); - if (typedesc != 0 && nested > 0) { - int nt = cp.getMethodrefNameAndType(index); - if (newMethodNTIndex != nt) { - newMethodNTIndex = nt; - newMethodIndex = cp.addMethodrefInfo(newClassIndex, nt); - } - - iterator.write16bit(newMethodIndex, pos + 1); - --nested; - } - } - - return pos; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformReadField.java b/src/com/wenshuo/agent/javassist/convert/TransformReadField.java deleted file mode 100644 index d8477c8..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformReadField.java +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtField; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.Modifier; - -public class TransformReadField extends Transformer { - protected String fieldname; - protected CtClass fieldClass; - protected boolean isPrivate; - protected String methodClassname, methodName; - - public TransformReadField(Transformer next, CtField field, - String methodClassname, String methodName) - { - super(next); - this.fieldClass = field.getDeclaringClass(); - this.fieldname = field.getName(); - this.methodClassname = methodClassname; - this.methodName = methodName; - this.isPrivate = Modifier.isPrivate(field.getModifiers()); - } - - static String isField(ClassPool pool, ConstPool cp, CtClass fclass, - String fname, boolean is_private, int index) { - if (!cp.getFieldrefName(index).equals(fname)) - return null; - - try { - CtClass c = pool.get(cp.getFieldrefClassName(index)); - if (c == fclass || (!is_private && isFieldInSuper(c, fclass, fname))) - return cp.getFieldrefType(index); - } - catch (NotFoundException e) {} - return null; - } - - static boolean isFieldInSuper(CtClass clazz, CtClass fclass, String fname) { - if (!clazz.subclassOf(fclass)) - return false; - - try { - CtField f = clazz.getField(fname); - return f.getDeclaringClass() == fclass; - } - catch (NotFoundException e) {} - return false; - } - - public int transform(CtClass tclazz, int pos, CodeIterator iterator, - ConstPool cp) throws BadBytecode - { - int c = iterator.byteAt(pos); - if (c == GETFIELD || c == GETSTATIC) { - int index = iterator.u16bitAt(pos + 1); - String typedesc = isField(tclazz.getClassPool(), cp, - fieldClass, fieldname, isPrivate, index); - if (typedesc != null) { - if (c == GETSTATIC) { - iterator.move(pos); - pos = iterator.insertGap(1); // insertGap() may insert 4 bytes. - iterator.writeByte(ACONST_NULL, pos); - pos = iterator.next(); - } - - String type = "(Ljava/lang/Object;)" + typedesc; - int mi = cp.addClassInfo(methodClassname); - int methodref = cp.addMethodrefInfo(mi, methodName, type); - iterator.writeByte(INVOKESTATIC, pos); - iterator.write16bit(methodref, pos + 1); - return pos; - } - } - - return pos; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/TransformWriteField.java b/src/com/wenshuo/agent/javassist/convert/TransformWriteField.java deleted file mode 100644 index ecc3f38..0000000 --- a/src/com/wenshuo/agent/javassist/convert/TransformWriteField.java +++ /dev/null @@ -1,72 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtField; -import com.wenshuo.agent.javassist.bytecode.*; - -final public class TransformWriteField extends TransformReadField { - public TransformWriteField(Transformer next, CtField field, - String methodClassname, String methodName) - { - super(next, field, methodClassname, methodName); - } - - public int transform(CtClass tclazz, int pos, CodeIterator iterator, - ConstPool cp) throws BadBytecode - { - int c = iterator.byteAt(pos); - if (c == PUTFIELD || c == PUTSTATIC) { - int index = iterator.u16bitAt(pos + 1); - String typedesc = isField(tclazz.getClassPool(), cp, - fieldClass, fieldname, isPrivate, index); - if (typedesc != null) { - if (c == PUTSTATIC) { - CodeAttribute ca = iterator.get(); - iterator.move(pos); - char c0 = typedesc.charAt(0); - if (c0 == 'J' || c0 == 'D') { // long or double - // insertGap() may insert 4 bytes. - pos = iterator.insertGap(3); - iterator.writeByte(ACONST_NULL, pos); - iterator.writeByte(DUP_X2, pos + 1); - iterator.writeByte(POP, pos + 2); - ca.setMaxStack(ca.getMaxStack() + 2); - } - else { - // insertGap() may insert 4 bytes. - pos = iterator.insertGap(2); - iterator.writeByte(ACONST_NULL, pos); - iterator.writeByte(SWAP, pos + 1); - ca.setMaxStack(ca.getMaxStack() + 1); - } - - pos = iterator.next(); - } - - int mi = cp.addClassInfo(methodClassname); - String type = "(Ljava/lang/Object;" + typedesc + ")V"; - int methodref = cp.addMethodrefInfo(mi, methodName, type); - iterator.writeByte(INVOKESTATIC, pos); - iterator.write16bit(methodref, pos + 1); - } - } - - return pos; - } -} diff --git a/src/com/wenshuo/agent/javassist/convert/Transformer.java b/src/com/wenshuo/agent/javassist/convert/Transformer.java deleted file mode 100644 index 573dcf6..0000000 --- a/src/com/wenshuo/agent/javassist/convert/Transformer.java +++ /dev/null @@ -1,57 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.convert; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.Opcode; - -/** - * Transformer and its subclasses are used for executing - * code transformation specified by CodeConverter. - * - * @see javassist.CodeConverter - */ -public abstract class Transformer implements Opcode { - private Transformer next; - - public Transformer(Transformer t) { - next = t; - } - - public Transformer getNext() { return next; } - - public void initialize(ConstPool cp, CodeAttribute attr) {} - - public void initialize(ConstPool cp, CtClass clazz, MethodInfo minfo) throws CannotCompileException { - initialize(cp, minfo.getCodeAttribute()); - } - - public void clean() {} - - public abstract int transform(CtClass clazz, int pos, CodeIterator it, - ConstPool cp) throws CannotCompileException, BadBytecode; - - public int extraLocals() { return 0; } - - public int extraStack() { return 0; } -} diff --git a/src/com/wenshuo/agent/javassist/expr/Cast.java b/src/com/wenshuo/agent/javassist/expr/Cast.java deleted file mode 100644 index 2f47ebf..0000000 --- a/src/com/wenshuo/agent/javassist/expr/Cast.java +++ /dev/null @@ -1,166 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * Explicit type cast. - */ -public class Cast extends Expr { - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected Cast(int pos, CodeIterator i, CtClass declaring, MethodInfo m) { - super(pos, i, declaring, m); - } - - /** - * Returns the method or constructor containing the type cast - * expression represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * type-cast expression. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the type-cast expression. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the CtClass object representing - * the type specified by the cast. - */ - public CtClass getType() throws NotFoundException { - ConstPool cp = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - String name = cp.getClassInfo(index); - return thisClass.getClassPool().getCtClass(name); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Replaces the explicit cast operator with the bytecode derived from - * the given source text. - * - *

$0 is available but the value is null. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - thisClass.getClassFile(); // to call checkModify(). - ConstPool constPool = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - - Javac jc = new Javac(thisClass); - ClassPool cp = thisClass.getClassPool(); - CodeAttribute ca = iterator.get(); - - try { - CtClass[] params - = new CtClass[] { cp.get(javaLangObject) }; - CtClass retType = getType(); - - int paramVar = ca.getMaxLocals(); - jc.recordParams(javaLangObject, params, true, paramVar, - withinStatic()); - int retVar = jc.recordReturnType(retType, true); - jc.recordProceed(new ProceedForCast(index, retType)); - - /* Is $_ included in the source code? - */ - checkResultValue(retType, statement); - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, true, paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - bytecode.addConstZero(retType); - bytecode.addStore(retVar, retType); // initialize $_ - - jc.compileStmnt(statement); - bytecode.addLoad(retVar, retType); - - replace0(pos, bytecode, 3); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } - - /* $proceed(Object obj) - */ - static class ProceedForCast implements ProceedHandler { - int index; - CtClass retType; - - ProceedForCast(int i, CtClass t) { - index = i; - retType = t; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - if (gen.getMethodArgsLength(args) != 1) - throw new CompileError(Javac.proceedName - + "() cannot take more than one parameter " - + "for cast"); - - gen.atMethodArgs(args, new int[1], new int[1], new String[1]); - bytecode.addOpcode(Opcode.CHECKCAST); - bytecode.addIndex(index); - gen.setType(retType); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.atMethodArgs(args, new int[1], new int[1], new String[1]); - c.setType(retType); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/ConstructorCall.java b/src/com/wenshuo/agent/javassist/expr/ConstructorCall.java deleted file mode 100644 index b99bddc..0000000 --- a/src/com/wenshuo/agent/javassist/expr/ConstructorCall.java +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtConstructor; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; - -/** - * Constructor call such as this() and super() - * within a constructor body. - * - * @see NewExpr - */ -public class ConstructorCall extends MethodCall { - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected ConstructorCall(int pos, CodeIterator i, CtClass decl, MethodInfo m) { - super(pos, i, decl, m); - } - - /** - * Returns "super" or ""this". - */ - public String getMethodName() { - return isSuper() ? "super" : "this"; - } - - /** - * Always throws a NotFoundException. - * - * @see #getConstructor() - */ - public CtMethod getMethod() throws NotFoundException { - throw new NotFoundException("this is a constructor call. Call getConstructor()."); - } - - /** - * Returns the called constructor. - */ - public CtConstructor getConstructor() throws NotFoundException { - return getCtClass().getConstructor(getSignature()); - } - - /** - * Returns true if the called constructor is not this() - * but super() (a constructor declared in the super class). - */ - public boolean isSuper() { - return super.isSuper(); - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/Expr.java b/src/com/wenshuo/agent/javassist/expr/Expr.java deleted file mode 100644 index 6dd56b9..0000000 --- a/src/com/wenshuo/agent/javassist/expr/Expr.java +++ /dev/null @@ -1,330 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtBehavior; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtConstructor; -import com.wenshuo.agent.javassist.CtPrimitiveType; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.AccessFlag; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.Bytecode; -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.CodeAttribute; -import com.wenshuo.agent.javassist.bytecode.CodeIterator; -import com.wenshuo.agent.javassist.bytecode.ConstPool; -import com.wenshuo.agent.javassist.bytecode.ExceptionTable; -import com.wenshuo.agent.javassist.bytecode.ExceptionsAttribute; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; -import com.wenshuo.agent.javassist.bytecode.Opcode; -import com.wenshuo.agent.javassist.compiler.Javac; - -import java.util.Iterator; -import java.util.LinkedList; - -/** - * Expression. - */ -public abstract class Expr implements Opcode { - int currentPos; - CodeIterator iterator; - CtClass thisClass; - MethodInfo thisMethod; - boolean edited; - int maxLocals, maxStack; - - static final String javaLangObject = "java.lang.Object"; - - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected Expr(int pos, CodeIterator i, CtClass declaring, MethodInfo m) { - currentPos = pos; - iterator = i; - thisClass = declaring; - thisMethod = m; - } - - /** - * Returns the class that declares the method enclosing - * this expression. - * - * @since 3.7 - */ - public CtClass getEnclosingClass() { return thisClass; } - - protected final ConstPool getConstPool() { - return thisMethod.getConstPool(); - } - - protected final boolean edited() { - return edited; - } - - protected final int locals() { - return maxLocals; - } - - protected final int stack() { - return maxStack; - } - - /** - * Returns true if this method is static. - */ - protected final boolean withinStatic() { - return (thisMethod.getAccessFlags() & AccessFlag.STATIC) != 0; - } - - /** - * Returns the constructor or method containing the expression. - */ - public CtBehavior where() { - MethodInfo mi = thisMethod; - CtBehavior[] cb = thisClass.getDeclaredBehaviors(); - for (int i = cb.length - 1; i >= 0; --i) - if (cb[i].getMethodInfo2() == mi) - return cb[i]; - - CtConstructor init = thisClass.getClassInitializer(); - if (init != null && init.getMethodInfo2() == mi) - return init; - - /* getDeclaredBehaviors() returns a list of methods/constructors. - * Although the list is cached in a CtClass object, it might be - * recreated for some reason. Thus, the member name and the signature - * must be also checked. - */ - for (int i = cb.length - 1; i >= 0; --i) { - if (thisMethod.getName().equals(cb[i].getMethodInfo2().getName()) - && thisMethod.getDescriptor() - .equals(cb[i].getMethodInfo2().getDescriptor())) { - return cb[i]; - } - } - - throw new RuntimeException("fatal: not found"); - } - - /** - * Returns the list of exceptions that the expression may throw. This list - * includes both the exceptions that the try-catch statements including the - * expression can catch and the exceptions that the throws declaration - * allows the method to throw. - */ - public CtClass[] mayThrow() { - ClassPool pool = thisClass.getClassPool(); - ConstPool cp = thisMethod.getConstPool(); - LinkedList list = new LinkedList(); - try { - CodeAttribute ca = thisMethod.getCodeAttribute(); - ExceptionTable et = ca.getExceptionTable(); - int pos = currentPos; - int n = et.size(); - for (int i = 0; i < n; ++i) - if (et.startPc(i) <= pos && pos < et.endPc(i)) { - int t = et.catchType(i); - if (t > 0) - try { - addClass(list, pool.get(cp.getClassInfo(t))); - } - catch (NotFoundException e) { - } - } - } - catch (NullPointerException e) { - } - - ExceptionsAttribute ea = thisMethod.getExceptionsAttribute(); - if (ea != null) { - String[] exceptions = ea.getExceptions(); - if (exceptions != null) { - int n = exceptions.length; - for (int i = 0; i < n; ++i) - try { - addClass(list, pool.get(exceptions[i])); - } - catch (NotFoundException e) { - } - } - } - - return (CtClass[])list.toArray(new CtClass[list.size()]); - } - - private static void addClass(LinkedList list, CtClass c) { - Iterator it = list.iterator(); - while (it.hasNext()) - if (it.next() == c) - return; - - list.add(c); - } - - /** - * Returns the index of the bytecode corresponding to the expression. It is - * the index into the byte array containing the Java bytecode that - * implements the method. - */ - public int indexOfBytecode() { - return currentPos; - } - - /** - * Returns the line number of the source line containing the expression. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return thisMethod.getLineNumber(currentPos); - } - - /** - * Returns the source file containing the expression. - * - * @return null if this information is not available. - */ - public String getFileName() { - ClassFile cf = thisClass.getClassFile2(); - if (cf == null) - return null; - else - return cf.getSourceFile(); - } - - static final boolean checkResultValue(CtClass retType, String prog) - throws CannotCompileException { - /* - * Is $_ included in the source code? - */ - boolean hasIt = (prog.indexOf(Javac.resultVarName) >= 0); - if (!hasIt && retType != CtClass.voidType) - throw new CannotCompileException( - "the resulting value is not stored in " - + Javac.resultVarName); - - return hasIt; - } - - /* - * If isStaticCall is true, null is assigned to $0. So $0 must be declared - * by calling Javac.recordParams(). - * - * After executing this method, the current stack depth might be less than - * 0. - */ - static final void storeStack(CtClass[] params, boolean isStaticCall, - int regno, Bytecode bytecode) { - storeStack0(0, params.length, params, regno + 1, bytecode); - if (isStaticCall) - bytecode.addOpcode(ACONST_NULL); - - bytecode.addAstore(regno); - } - - private static void storeStack0(int i, int n, CtClass[] params, int regno, - Bytecode bytecode) { - if (i >= n) - return; - else { - CtClass c = params[i]; - int size; - if (c instanceof CtPrimitiveType) - size = ((CtPrimitiveType)c).getDataSize(); - else - size = 1; - - storeStack0(i + 1, n, params, regno + size, bytecode); - bytecode.addStore(regno, c); - } - } - - // The implementation of replace() should call thisClass.checkModify() - // so that isModify() will return true. Otherwise, thisClass.classfile - // might be released during compilation and the compiler might generate - // bytecode with a wrong copy of ConstPool. - - /** - * Replaces this expression with the bytecode derived from - * the given source text. - * - * @param statement a Java statement except try-catch. - */ - public abstract void replace(String statement) throws CannotCompileException; - - /** - * Replaces this expression with the bytecode derived from - * the given source text and ExprEditor. - * - * @param statement a Java statement except try-catch. - * @param recursive if not null, the substituted bytecode - * is recursively processed by the given - * ExprEditor. - * @since 3.1 - */ - public void replace(String statement, ExprEditor recursive) - throws CannotCompileException - { - replace(statement); - if (recursive != null) - runEditor(recursive, iterator); - } - - protected void replace0(int pos, Bytecode bytecode, int size) - throws BadBytecode { - byte[] code = bytecode.get(); - edited = true; - int gap = code.length - size; - for (int i = 0; i < size; ++i) - iterator.writeByte(NOP, pos + i); - - if (gap > 0) - pos = iterator.insertGapAt(pos, gap, false).position; - - iterator.write(code, pos); - iterator.insert(bytecode.getExceptionTable(), pos); - maxLocals = bytecode.getMaxLocals(); - maxStack = bytecode.getMaxStack(); - } - - protected void runEditor(ExprEditor ed, CodeIterator oldIterator) - throws CannotCompileException - { - CodeAttribute codeAttr = oldIterator.get(); - int orgLocals = codeAttr.getMaxLocals(); - int orgStack = codeAttr.getMaxStack(); - int newLocals = locals(); - codeAttr.setMaxStack(stack()); - codeAttr.setMaxLocals(newLocals); - ExprEditor.LoopContext context - = new ExprEditor.LoopContext(newLocals); - int size = oldIterator.getCodeLength(); - int endPos = oldIterator.lookAhead(); - oldIterator.move(currentPos); - if (ed.doit(thisClass, thisMethod, context, oldIterator, endPos)) - edited = true; - - oldIterator.move(endPos + oldIterator.getCodeLength() - size); - codeAttr.setMaxLocals(orgLocals); - codeAttr.setMaxStack(orgStack); - maxLocals = context.maxLocals; - maxStack += context.maxStack; - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/ExprEditor.java b/src/com/wenshuo/agent/javassist/expr/ExprEditor.java deleted file mode 100644 index c4711bd..0000000 --- a/src/com/wenshuo/agent/javassist/expr/ExprEditor.java +++ /dev/null @@ -1,317 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CannotCompileException; - -/** - * A translator of method bodies. - * - *

The users can define a subclass of this class to customize how to - * modify a method body. The overall architecture is similar to the - * strategy pattern. - * - *

If instrument() is called in - * CtMethod, the method body is scanned from the beginning - * to the end. - * Whenever an expression, such as a method call and a new - * expression (object creation), - * is found, edit() is called in ExprEdit. - * edit() can inspect and modify the given expression. - * The modification is reflected on the original method body. If - * edit() does nothing, the original method body is not - * changed. - * - *

The following code is an example: - * - * 

- * CtMethod cm = ...;
- * cm.instrument(new ExprEditor() {
- *     public void edit(MethodCall m) throws CannotCompileException {
- *         if (m.getClassName().equals("Point")) {
- *             System.out.println(m.getMethodName() + " line: "
- *                                + m.getLineNumber());
- *     }
- * });
- *
- * - *

This code inspects all method calls appearing in the method represented - * by cm and it prints the names and the line numbers of the - * methods declared in class Point. This code does not modify - * the body of the method represented by cm. If the method - * body must be modified, call replace() - * in MethodCall. - * - * @see javassist.CtClass#instrument(ExprEditor) - * @see javassist.CtMethod#instrument(ExprEditor) - * @see javassist.CtConstructor#instrument(ExprEditor) - * @see MethodCall - * @see NewExpr - * @see FieldAccess - * - * @see javassist.CodeConverter - */ -public class ExprEditor { - /** - * Default constructor. It does nothing. - */ - public ExprEditor() {} - - /** - * Undocumented method. Do not use; internal-use only. - */ - public boolean doit(CtClass clazz, MethodInfo minfo) - throws CannotCompileException - { - CodeAttribute codeAttr = minfo.getCodeAttribute(); - if (codeAttr == null) - return false; - - CodeIterator iterator = codeAttr.iterator(); - boolean edited = false; - LoopContext context = new LoopContext(codeAttr.getMaxLocals()); - - while (iterator.hasNext()) - if (loopBody(iterator, clazz, minfo, context)) - edited = true; - - ExceptionTable et = codeAttr.getExceptionTable(); - int n = et.size(); - for (int i = 0; i < n; ++i) { - Handler h = new Handler(et, i, iterator, clazz, minfo); - edit(h); - if (h.edited()) { - edited = true; - context.updateMax(h.locals(), h.stack()); - } - } - - // codeAttr might be modified by other partiess - // so I check the current value of max-locals. - if (codeAttr.getMaxLocals() < context.maxLocals) - codeAttr.setMaxLocals(context.maxLocals); - - codeAttr.setMaxStack(codeAttr.getMaxStack() + context.maxStack); - try { - if (edited) - minfo.rebuildStackMapIf6(clazz.getClassPool(), - clazz.getClassFile2()); - } - catch (BadBytecode b) { - throw new CannotCompileException(b.getMessage(), b); - } - - return edited; - } - - /** - * Visits each bytecode in the given range. - */ - boolean doit(CtClass clazz, MethodInfo minfo, LoopContext context, - CodeIterator iterator, int endPos) - throws CannotCompileException - { - boolean edited = false; - while (iterator.hasNext() && iterator.lookAhead() < endPos) { - int size = iterator.getCodeLength(); - if (loopBody(iterator, clazz, minfo, context)) { - edited = true; - int size2 = iterator.getCodeLength(); - if (size != size2) // the body was modified. - endPos += size2 - size; - } - } - - return edited; - } - - final static class NewOp { - NewOp next; - int pos; - String type; - - NewOp(NewOp n, int p, String t) { - next = n; - pos = p; - type = t; - } - } - - final static class LoopContext { - NewOp newList; - int maxLocals; - int maxStack; - - LoopContext(int locals) { - maxLocals = locals; - maxStack = 0; - newList = null; - } - - void updateMax(int locals, int stack) { - if (maxLocals < locals) - maxLocals = locals; - - if (maxStack < stack) - maxStack = stack; - } - } - - final boolean loopBody(CodeIterator iterator, CtClass clazz, - MethodInfo minfo, LoopContext context) - throws CannotCompileException - { - try { - Expr expr = null; - int pos = iterator.next(); - int c = iterator.byteAt(pos); - - if (c < Opcode.GETSTATIC) // c < 178 - /* skip */; - else if (c < Opcode.NEWARRAY) { // c < 188 - if (c == Opcode.INVOKESTATIC - || c == Opcode.INVOKEINTERFACE - || c == Opcode.INVOKEVIRTUAL) { - expr = new MethodCall(pos, iterator, clazz, minfo); - edit((MethodCall)expr); - } - else if (c == Opcode.GETFIELD || c == Opcode.GETSTATIC - || c == Opcode.PUTFIELD - || c == Opcode.PUTSTATIC) { - expr = new FieldAccess(pos, iterator, clazz, minfo, c); - edit((FieldAccess)expr); - } - else if (c == Opcode.NEW) { - int index = iterator.u16bitAt(pos + 1); - context.newList = new NewOp(context.newList, pos, - minfo.getConstPool().getClassInfo(index)); - } - else if (c == Opcode.INVOKESPECIAL) { - NewOp newList = context.newList; - if (newList != null - && minfo.getConstPool().isConstructor(newList.type, - iterator.u16bitAt(pos + 1)) > 0) { - expr = new NewExpr(pos, iterator, clazz, minfo, - newList.type, newList.pos); - edit((NewExpr)expr); - context.newList = newList.next; - } - else { - MethodCall mcall = new MethodCall(pos, iterator, clazz, minfo); - if (mcall.getMethodName().equals(MethodInfo.nameInit)) { - ConstructorCall ccall = new ConstructorCall(pos, iterator, clazz, minfo); - expr = ccall; - edit(ccall); - } - else { - expr = mcall; - edit(mcall); - } - } - } - } - else { // c >= 188 - if (c == Opcode.NEWARRAY || c == Opcode.ANEWARRAY - || c == Opcode.MULTIANEWARRAY) { - expr = new NewArray(pos, iterator, clazz, minfo, c); - edit((NewArray)expr); - } - else if (c == Opcode.INSTANCEOF) { - expr = new Instanceof(pos, iterator, clazz, minfo); - edit((Instanceof)expr); - } - else if (c == Opcode.CHECKCAST) { - expr = new Cast(pos, iterator, clazz, minfo); - edit((Cast)expr); - } - } - - if (expr != null && expr.edited()) { - context.updateMax(expr.locals(), expr.stack()); - return true; - } - else - return false; - } - catch (BadBytecode e) { - throw new CannotCompileException(e); - } - } - - /** - * Edits a new expression (overridable). - * The default implementation performs nothing. - * - * @param e the new expression creating an object. - */ - public void edit(NewExpr e) throws CannotCompileException {} - - /** - * Edits an expression for array creation (overridable). - * The default implementation performs nothing. - * - * @param a the new expression for creating an array. - * @throws CannotCompileException - */ - public void edit(NewArray a) throws CannotCompileException {} - - /** - * Edits a method call (overridable). - * - * The default implementation performs nothing. - */ - public void edit(MethodCall m) throws CannotCompileException {} - - /** - * Edits a constructor call (overridable). - * The constructor call is either - * super() or this() - * included in a constructor body. - * - * The default implementation performs nothing. - * - * @see #edit(NewExpr) - */ - public void edit(ConstructorCall c) throws CannotCompileException {} - - /** - * Edits a field-access expression (overridable). - * Field access means both read and write. - * The default implementation performs nothing. - */ - public void edit(FieldAccess f) throws CannotCompileException {} - - /** - * Edits an instanceof expression (overridable). - * The default implementation performs nothing. - */ - public void edit(Instanceof i) throws CannotCompileException {} - - /** - * Edits an expression for explicit type casting (overridable). - * The default implementation performs nothing. - */ - public void edit(Cast c) throws CannotCompileException {} - - /** - * Edits a catch clause (overridable). - * The default implementation performs nothing. - */ - public void edit(Handler h) throws CannotCompileException {} -} diff --git a/src/com/wenshuo/agent/javassist/expr/FieldAccess.java b/src/com/wenshuo/agent/javassist/expr/FieldAccess.java deleted file mode 100644 index 523277e..0000000 --- a/src/com/wenshuo/agent/javassist/expr/FieldAccess.java +++ /dev/null @@ -1,325 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * Expression for accessing a field. - */ -public class FieldAccess extends Expr { - int opcode; - - protected FieldAccess(int pos, CodeIterator i, CtClass declaring, - MethodInfo m, int op) { - super(pos, i, declaring, m); - opcode = op; - } - - /** - * Returns the method or constructor containing the field-access - * expression represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * field access. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the field access. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns true if the field is static. - */ - public boolean isStatic() { - return isStatic(opcode); - } - - static boolean isStatic(int c) { - return c == Opcode.GETSTATIC || c == Opcode.PUTSTATIC; - } - - /** - * Returns true if the field is read. - */ - public boolean isReader() { - return opcode == Opcode.GETFIELD || opcode == Opcode.GETSTATIC; - } - - /** - * Returns true if the field is written in. - */ - public boolean isWriter() { - return opcode == Opcode.PUTFIELD || opcode == Opcode.PUTSTATIC; - } - - /** - * Returns the class in which the field is declared. - */ - private CtClass getCtClass() throws NotFoundException { - return thisClass.getClassPool().get(getClassName()); - } - - /** - * Returns the name of the class in which the field is declared. - */ - public String getClassName() { - int index = iterator.u16bitAt(currentPos + 1); - return getConstPool().getFieldrefClassName(index); - } - - /** - * Returns the name of the field. - */ - public String getFieldName() { - int index = iterator.u16bitAt(currentPos + 1); - return getConstPool().getFieldrefName(index); - } - - /** - * Returns the field accessed by this expression. - */ - public CtField getField() throws NotFoundException { - CtClass cc = getCtClass(); - int index = iterator.u16bitAt(currentPos + 1); - ConstPool cp = getConstPool(); - return cc.getField(cp.getFieldrefName(index), cp.getFieldrefType(index)); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Returns the signature of the field type. - * The signature is represented by a character string - * called field descriptor, which is defined in the JVM specification. - * - * @see javassist.bytecode.Descriptor#toCtClass(String, ClassPool) - * @since 3.1 - */ - public String getSignature() { - int index = iterator.u16bitAt(currentPos + 1); - return getConstPool().getFieldrefType(index); - } - - /** - * Replaces the method call with the bytecode derived from - * the given source text. - * - *

$0 is available even if the called method is static. - * If the field access is writing, $_ is available but the value - * of $_ is ignored. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - thisClass.getClassFile(); // to call checkModify(). - ConstPool constPool = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - - Javac jc = new Javac(thisClass); - CodeAttribute ca = iterator.get(); - try { - CtClass[] params; - CtClass retType; - CtClass fieldType - = Descriptor.toCtClass(constPool.getFieldrefType(index), - thisClass.getClassPool()); - boolean read = isReader(); - if (read) { - params = new CtClass[0]; - retType = fieldType; - } - else { - params = new CtClass[1]; - params[0] = fieldType; - retType = CtClass.voidType; - } - - int paramVar = ca.getMaxLocals(); - jc.recordParams(constPool.getFieldrefClassName(index), params, - true, paramVar, withinStatic()); - - /* Is $_ included in the source code? - */ - boolean included = checkResultValue(retType, statement); - if (read) - included = true; - - int retVar = jc.recordReturnType(retType, included); - if (read) - jc.recordProceed(new ProceedForRead(retType, opcode, - index, paramVar)); - else { - // because $type is not the return type... - jc.recordType(fieldType); - jc.recordProceed(new ProceedForWrite(params[0], opcode, - index, paramVar)); - } - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, isStatic(), paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - if (included) - if (retType == CtClass.voidType) { - bytecode.addOpcode(ACONST_NULL); - bytecode.addAstore(retVar); - } - else { - bytecode.addConstZero(retType); - bytecode.addStore(retVar, retType); // initialize $_ - } - - jc.compileStmnt(statement); - if (read) - bytecode.addLoad(retVar, retType); - - replace0(pos, bytecode, 3); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } - - /* $proceed() - */ - static class ProceedForRead implements ProceedHandler { - CtClass fieldType; - int opcode; - int targetVar, index; - - ProceedForRead(CtClass type, int op, int i, int var) { - fieldType = type; - targetVar = var; - opcode = op; - index = i; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - if (args != null && !gen.isParamListName(args)) - throw new CompileError(Javac.proceedName - + "() cannot take a parameter for field reading"); - - int stack; - if (isStatic(opcode)) - stack = 0; - else { - stack = -1; - bytecode.addAload(targetVar); - } - - if (fieldType instanceof CtPrimitiveType) - stack += ((CtPrimitiveType)fieldType).getDataSize(); - else - ++stack; - - bytecode.add(opcode); - bytecode.addIndex(index); - bytecode.growStack(stack); - gen.setType(fieldType); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.setType(fieldType); - } - } - - /* void $proceed() - * the return type is not the field type but void. - */ - static class ProceedForWrite implements ProceedHandler { - CtClass fieldType; - int opcode; - int targetVar, index; - - ProceedForWrite(CtClass type, int op, int i, int var) { - fieldType = type; - targetVar = var; - opcode = op; - index = i; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - if (gen.getMethodArgsLength(args) != 1) - throw new CompileError(Javac.proceedName - + "() cannot take more than one parameter " - + "for field writing"); - - int stack; - if (isStatic(opcode)) - stack = 0; - else { - stack = -1; - bytecode.addAload(targetVar); - } - - gen.atMethodArgs(args, new int[1], new int[1], new String[1]); - gen.doNumCast(fieldType); - if (fieldType instanceof CtPrimitiveType) - stack -= ((CtPrimitiveType)fieldType).getDataSize(); - else - --stack; - - bytecode.add(opcode); - bytecode.addIndex(index); - bytecode.growStack(stack); - gen.setType(CtClass.voidType); - gen.addNullIfVoid(); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.atMethodArgs(args, new int[1], new int[1], new String[1]); - c.setType(CtClass.voidType); - c.addNullIfVoid(); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/Handler.java b/src/com/wenshuo/agent/javassist/expr/Handler.java deleted file mode 100644 index 66665c3..0000000 --- a/src/com/wenshuo/agent/javassist/expr/Handler.java +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; - -/** - * A catch clause or a finally block. - */ -public class Handler extends Expr { - private static String EXCEPTION_NAME = "$1"; - private ExceptionTable etable; - private int index; - - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected Handler(ExceptionTable et, int nth, - CodeIterator it, CtClass declaring, MethodInfo m) { - super(et.handlerPc(nth), it, declaring, m); - etable = et; - index = nth; - } - - /** - * Returns the method or constructor containing the catch clause. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the source line number of the catch clause. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the catch clause. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the list of exceptions that the catch clause may throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Returns the type handled by the catch clause. - * If this is a finally block, null is returned. - */ - public CtClass getType() throws NotFoundException { - int type = etable.catchType(index); - if (type == 0) - return null; - else { - ConstPool cp = getConstPool(); - String name = cp.getClassInfo(type); - return thisClass.getClassPool().getCtClass(name); - } - } - - /** - * Returns true if this is a finally block. - */ - public boolean isFinally() { - return etable.catchType(index) == 0; - } - - /** - * This method has not been implemented yet. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - throw new RuntimeException("not implemented yet"); - } - - /** - * Inserts bytecode at the beginning of the catch clause. - * The caught exception is stored in $1. - * - * @param src the source code representing the inserted bytecode. - * It must be a single statement or block. - */ - public void insertBefore(String src) throws CannotCompileException { - edited = true; - - ConstPool cp = getConstPool(); - CodeAttribute ca = iterator.get(); - Javac jv = new Javac(thisClass); - Bytecode b = jv.getBytecode(); - b.setStackDepth(1); - b.setMaxLocals(ca.getMaxLocals()); - - try { - CtClass type = getType(); - int var = jv.recordVariable(type, EXCEPTION_NAME); - jv.recordReturnType(type, false); - b.addAstore(var); - jv.compileStmnt(src); - b.addAload(var); - - int oldHandler = etable.handlerPc(index); - b.addOpcode(Opcode.GOTO); - b.addIndex(oldHandler - iterator.getCodeLength() - - b.currentPc() + 1); - - maxStack = b.getMaxStack(); - maxLocals = b.getMaxLocals(); - - int pos = iterator.append(b.get()); - iterator.append(b.getExceptionTable(), pos); - etable.setHandlerPc(index, pos); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - catch (CompileError e) { - throw new CannotCompileException(e); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/Instanceof.java b/src/com/wenshuo/agent/javassist/expr/Instanceof.java deleted file mode 100644 index 1ea4ee1..0000000 --- a/src/com/wenshuo/agent/javassist/expr/Instanceof.java +++ /dev/null @@ -1,170 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * Instanceof operator. - */ -public class Instanceof extends Expr { - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected Instanceof(int pos, CodeIterator i, CtClass declaring, - MethodInfo m) { - super(pos, i, declaring, m); - } - - /** - * Returns the method or constructor containing the instanceof - * expression represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * instanceof expression. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the - * instanceof expression. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the CtClass object representing - * the type name on the right hand side - * of the instanceof operator. - */ - public CtClass getType() throws NotFoundException { - ConstPool cp = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - String name = cp.getClassInfo(index); - return thisClass.getClassPool().getCtClass(name); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Replaces the instanceof operator with the bytecode derived from - * the given source text. - * - *

$0 is available but the value is null. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - thisClass.getClassFile(); // to call checkModify(). - ConstPool constPool = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - - Javac jc = new Javac(thisClass); - ClassPool cp = thisClass.getClassPool(); - CodeAttribute ca = iterator.get(); - - try { - CtClass[] params - = new CtClass[] { cp.get(javaLangObject) }; - CtClass retType = CtClass.booleanType; - - int paramVar = ca.getMaxLocals(); - jc.recordParams(javaLangObject, params, true, paramVar, - withinStatic()); - int retVar = jc.recordReturnType(retType, true); - jc.recordProceed(new ProceedForInstanceof(index)); - - // because $type is not the return type... - jc.recordType(getType()); - - /* Is $_ included in the source code? - */ - checkResultValue(retType, statement); - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, true, paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - bytecode.addConstZero(retType); - bytecode.addStore(retVar, retType); // initialize $_ - - jc.compileStmnt(statement); - bytecode.addLoad(retVar, retType); - - replace0(pos, bytecode, 3); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } - - /* boolean $proceed(Object obj) - */ - static class ProceedForInstanceof implements ProceedHandler { - int index; - - ProceedForInstanceof(int i) { - index = i; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - if (gen.getMethodArgsLength(args) != 1) - throw new CompileError(Javac.proceedName - + "() cannot take more than one parameter " - + "for instanceof"); - - gen.atMethodArgs(args, new int[1], new int[1], new String[1]); - bytecode.addOpcode(Opcode.INSTANCEOF); - bytecode.addIndex(index); - gen.setType(CtClass.booleanType); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.atMethodArgs(args, new int[1], new int[1], new String[1]); - c.setType(CtClass.booleanType); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/MethodCall.java b/src/com/wenshuo/agent/javassist/expr/MethodCall.java deleted file mode 100644 index 70496b1..0000000 --- a/src/com/wenshuo/agent/javassist/expr/MethodCall.java +++ /dev/null @@ -1,247 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; - -/** - * Method invocation (caller-side expression). - */ -public class MethodCall extends Expr { - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected MethodCall(int pos, CodeIterator i, CtClass declaring, - MethodInfo m) { - super(pos, i, declaring, m); - } - - private int getNameAndType(ConstPool cp) { - int pos = currentPos; - int c = iterator.byteAt(pos); - int index = iterator.u16bitAt(pos + 1); - - if (c == INVOKEINTERFACE) - return cp.getInterfaceMethodrefNameAndType(index); - else - return cp.getMethodrefNameAndType(index); - } - - /** - * Returns the method or constructor containing the method-call - * expression represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * method call. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the method call. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the class of the target object, - * which the method is called on. - */ - protected CtClass getCtClass() throws NotFoundException { - return thisClass.getClassPool().get(getClassName()); - } - - /** - * Returns the class name of the target object, - * which the method is called on. - */ - public String getClassName() { - String cname; - - ConstPool cp = getConstPool(); - int pos = currentPos; - int c = iterator.byteAt(pos); - int index = iterator.u16bitAt(pos + 1); - - if (c == INVOKEINTERFACE) - cname = cp.getInterfaceMethodrefClassName(index); - else - cname = cp.getMethodrefClassName(index); - - if (cname.charAt(0) == '[') - cname = Descriptor.toClassName(cname); - - return cname; - } - - /** - * Returns the name of the called method. - */ - public String getMethodName() { - ConstPool cp = getConstPool(); - int nt = getNameAndType(cp); - return cp.getUtf8Info(cp.getNameAndTypeName(nt)); - } - - /** - * Returns the called method. - */ - public CtMethod getMethod() throws NotFoundException { - return getCtClass().getMethod(getMethodName(), getSignature()); - } - - /** - * Returns the method signature (the parameter types - * and the return type). - * The method signature is represented by a character string - * called method descriptor, which is defined in the JVM specification. - * - * @see javassist.CtBehavior#getSignature() - * @see javassist.bytecode.Descriptor - * @since 3.1 - */ - public String getSignature() { - ConstPool cp = getConstPool(); - int nt = getNameAndType(cp); - return cp.getUtf8Info(cp.getNameAndTypeDescriptor(nt)); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Returns true if the called method is of a superclass of the current - * class. - */ - public boolean isSuper() { - return iterator.byteAt(currentPos) == INVOKESPECIAL - && !where().getDeclaringClass().getName().equals(getClassName()); - } - - /* - * Returns the parameter types of the called method. - - public CtClass[] getParameterTypes() throws NotFoundException { - return Descriptor.getParameterTypes(getMethodDesc(), - thisClass.getClassPool()); - } - */ - - /* - * Returns the return type of the called method. - - public CtClass getReturnType() throws NotFoundException { - return Descriptor.getReturnType(getMethodDesc(), - thisClass.getClassPool()); - } - */ - - /** - * Replaces the method call with the bytecode derived from - * the given source text. - * - *

$0 is available even if the called method is static. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - thisClass.getClassFile(); // to call checkModify(). - ConstPool constPool = getConstPool(); - int pos = currentPos; - int index = iterator.u16bitAt(pos + 1); - - String classname, methodname, signature; - int opcodeSize; - int c = iterator.byteAt(pos); - if (c == INVOKEINTERFACE) { - opcodeSize = 5; - classname = constPool.getInterfaceMethodrefClassName(index); - methodname = constPool.getInterfaceMethodrefName(index); - signature = constPool.getInterfaceMethodrefType(index); - } - else if (c == INVOKESTATIC - || c == INVOKESPECIAL || c == INVOKEVIRTUAL) { - opcodeSize = 3; - classname = constPool.getMethodrefClassName(index); - methodname = constPool.getMethodrefName(index); - signature = constPool.getMethodrefType(index); - } - else - throw new CannotCompileException("not method invocation"); - - Javac jc = new Javac(thisClass); - ClassPool cp = thisClass.getClassPool(); - CodeAttribute ca = iterator.get(); - try { - CtClass[] params = Descriptor.getParameterTypes(signature, cp); - CtClass retType = Descriptor.getReturnType(signature, cp); - int paramVar = ca.getMaxLocals(); - jc.recordParams(classname, params, - true, paramVar, withinStatic()); - int retVar = jc.recordReturnType(retType, true); - if (c == INVOKESTATIC) - jc.recordStaticProceed(classname, methodname); - else if (c == INVOKESPECIAL) - jc.recordSpecialProceed(Javac.param0Name, classname, - methodname, signature); - else - jc.recordProceed(Javac.param0Name, methodname); - - /* Is $_ included in the source code? - */ - checkResultValue(retType, statement); - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, c == INVOKESTATIC, paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - if (retType != CtClass.voidType) { - bytecode.addConstZero(retType); - bytecode.addStore(retVar, retType); // initialize $_ - } - - jc.compileStmnt(statement); - if (retType != CtClass.voidType) - bytecode.addLoad(retVar, retType); - - replace0(pos, bytecode, opcodeSize); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/NewArray.java b/src/com/wenshuo/agent/javassist/expr/NewArray.java deleted file mode 100644 index 1c8f1e6..0000000 --- a/src/com/wenshuo/agent/javassist/expr/NewArray.java +++ /dev/null @@ -1,283 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * Array creation. - * - *

This class does not provide methods for obtaining the initial - * values of array elements. - */ -public class NewArray extends Expr { - int opcode; - - protected NewArray(int pos, CodeIterator i, CtClass declaring, - MethodInfo m, int op) { - super(pos, i, declaring, m); - opcode = op; - } - - /** - * Returns the method or constructor containing the array creation - * represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * array creation. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the array creation. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /** - * Returns the type of array components. If the created array is - * a two-dimensional array of int, - * the type returned by this method is - * not int[] but int. - */ - public CtClass getComponentType() throws NotFoundException { - if (opcode == Opcode.NEWARRAY) { - int atype = iterator.byteAt(currentPos + 1); - return getPrimitiveType(atype); - } - else if (opcode == Opcode.ANEWARRAY - || opcode == Opcode.MULTIANEWARRAY) { - int index = iterator.u16bitAt(currentPos + 1); - String desc = getConstPool().getClassInfo(index); - int dim = Descriptor.arrayDimension(desc); - desc = Descriptor.toArrayComponent(desc, dim); - return Descriptor.toCtClass(desc, thisClass.getClassPool()); - } - else - throw new RuntimeException("bad opcode: " + opcode); - } - - CtClass getPrimitiveType(int atype) { - switch (atype) { - case Opcode.T_BOOLEAN : - return CtClass.booleanType; - case Opcode.T_CHAR : - return CtClass.charType; - case Opcode.T_FLOAT : - return CtClass.floatType; - case Opcode.T_DOUBLE : - return CtClass.doubleType; - case Opcode.T_BYTE : - return CtClass.byteType; - case Opcode.T_SHORT : - return CtClass.shortType; - case Opcode.T_INT : - return CtClass.intType; - case Opcode.T_LONG : - return CtClass.longType; - default : - throw new RuntimeException("bad atype: " + atype); - } - } - - /** - * Returns the dimension of the created array. - */ - public int getDimension() { - if (opcode == Opcode.NEWARRAY) - return 1; - else if (opcode == Opcode.ANEWARRAY - || opcode == Opcode.MULTIANEWARRAY) { - int index = iterator.u16bitAt(currentPos + 1); - String desc = getConstPool().getClassInfo(index); - return Descriptor.arrayDimension(desc) - + (opcode == Opcode.ANEWARRAY ? 1 : 0); - } - else - throw new RuntimeException("bad opcode: " + opcode); - } - - /** - * Returns the number of dimensions of arrays to be created. - * If the opcode is multianewarray, this method returns the second - * operand. Otherwise, it returns 1. - */ - public int getCreatedDimensions() { - if (opcode == Opcode.MULTIANEWARRAY) - return iterator.byteAt(currentPos + 3); - else - return 1; - } - - /** - * Replaces the array creation with the bytecode derived from - * the given source text. - * - *

$0 is available even if the called method is static. - * If the field access is writing, $_ is available but the value - * of $_ is ignored. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - try { - replace2(statement); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } - - private void replace2(String statement) - throws CompileError, NotFoundException, BadBytecode, - CannotCompileException - { - thisClass.getClassFile(); // to call checkModify(). - ConstPool constPool = getConstPool(); - int pos = currentPos; - CtClass retType; - int codeLength; - int index = 0; - int dim = 1; - String desc; - if (opcode == Opcode.NEWARRAY) { - index = iterator.byteAt(currentPos + 1); // atype - CtPrimitiveType cpt = (CtPrimitiveType)getPrimitiveType(index); - desc = "[" + cpt.getDescriptor(); - codeLength = 2; - } - else if (opcode == Opcode.ANEWARRAY) { - index = iterator.u16bitAt(pos + 1); - desc = constPool.getClassInfo(index); - if (desc.startsWith("[")) - desc = "[" + desc; - else - desc = "[L" + desc + ";"; - - codeLength = 3; - } - else if (opcode == Opcode.MULTIANEWARRAY) { - index = iterator.u16bitAt(currentPos + 1); - desc = constPool.getClassInfo(index); - dim = iterator.byteAt(currentPos + 3); - codeLength = 4; - } - else - throw new RuntimeException("bad opcode: " + opcode); - - retType = Descriptor.toCtClass(desc, thisClass.getClassPool()); - - Javac jc = new Javac(thisClass); - CodeAttribute ca = iterator.get(); - - CtClass[] params = new CtClass[dim]; - for (int i = 0; i < dim; ++i) - params[i] = CtClass.intType; - - int paramVar = ca.getMaxLocals(); - jc.recordParams(javaLangObject, params, - true, paramVar, withinStatic()); - - /* Is $_ included in the source code? - */ - checkResultValue(retType, statement); - int retVar = jc.recordReturnType(retType, true); - jc.recordProceed(new ProceedForArray(retType, opcode, index, dim)); - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, true, paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - bytecode.addOpcode(ACONST_NULL); // initialize $_ - bytecode.addAstore(retVar); - - jc.compileStmnt(statement); - bytecode.addAload(retVar); - - replace0(pos, bytecode, codeLength); - } - - /* $proceed( ..) - */ - static class ProceedForArray implements ProceedHandler { - CtClass arrayType; - int opcode; - int index, dimension; - - ProceedForArray(CtClass type, int op, int i, int dim) { - arrayType = type; - opcode = op; - index = i; - dimension = dim; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - int num = gen.getMethodArgsLength(args); - if (num != dimension) - throw new CompileError(Javac.proceedName - + "() with a wrong number of parameters"); - - gen.atMethodArgs(args, new int[num], - new int[num], new String[num]); - bytecode.addOpcode(opcode); - if (opcode == Opcode.ANEWARRAY) - bytecode.addIndex(index); - else if (opcode == Opcode.NEWARRAY) - bytecode.add(index); - else /* if (opcode == Opcode.MULTIANEWARRAY) */ { - bytecode.addIndex(index); - bytecode.add(dimension); - bytecode.growStack(1 - dimension); - } - - gen.setType(arrayType); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.setType(arrayType); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/NewExpr.java b/src/com/wenshuo/agent/javassist/expr/NewExpr.java deleted file mode 100644 index e3f1a14..0000000 --- a/src/com/wenshuo/agent/javassist/expr/NewExpr.java +++ /dev/null @@ -1,249 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.expr; - -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.bytecode.*; -import com.wenshuo.agent.javassist.compiler.*; -import com.wenshuo.agent.javassist.compiler.ast.ASTList; - -/** - * Object creation (new expression). - */ -public class NewExpr extends Expr { - String newTypeName; - int newPos; - - /** - * Undocumented constructor. Do not use; internal-use only. - */ - protected NewExpr(int pos, CodeIterator i, CtClass declaring, - MethodInfo m, String type, int np) { - super(pos, i, declaring, m); - newTypeName = type; - newPos = np; - } - - /* - * Not used - * - private int getNameAndType(ConstPool cp) { - int pos = currentPos; - int c = iterator.byteAt(pos); - int index = iterator.u16bitAt(pos + 1); - - if (c == INVOKEINTERFACE) - return cp.getInterfaceMethodrefNameAndType(index); - else - return cp.getMethodrefNameAndType(index); - } */ - - /** - * Returns the method or constructor containing the new - * expression represented by this object. - */ - public CtBehavior where() { return super.where(); } - - /** - * Returns the line number of the source line containing the - * new expression. - * - * @return -1 if this information is not available. - */ - public int getLineNumber() { - return super.getLineNumber(); - } - - /** - * Returns the source file containing the new expression. - * - * @return null if this information is not available. - */ - public String getFileName() { - return super.getFileName(); - } - - /** - * Returns the class of the created object. - */ - private CtClass getCtClass() throws NotFoundException { - return thisClass.getClassPool().get(newTypeName); - } - - /** - * Returns the class name of the created object. - */ - public String getClassName() { - return newTypeName; - } - - /** - * Get the signature of the constructor - * - * The signature is represented by a character string - * called method descriptor, which is defined in the JVM specification. - * - * @see javassist.CtBehavior#getSignature() - * @see javassist.bytecode.Descriptor - * @return the signature - */ - public String getSignature() { - ConstPool constPool = getConstPool(); - int methodIndex = iterator.u16bitAt(currentPos + 1); // constructor - return constPool.getMethodrefType(methodIndex); - } - - /** - * Returns the constructor called for creating the object. - */ - public CtConstructor getConstructor() throws NotFoundException { - ConstPool cp = getConstPool(); - int index = iterator.u16bitAt(currentPos + 1); - String desc = cp.getMethodrefType(index); - return getCtClass().getConstructor(desc); - } - - /** - * Returns the list of exceptions that the expression may throw. - * This list includes both the exceptions that the try-catch statements - * including the expression can catch and the exceptions that - * the throws declaration allows the method to throw. - */ - public CtClass[] mayThrow() { - return super.mayThrow(); - } - - /* - * Returns the parameter types of the constructor. - - public CtClass[] getParameterTypes() throws NotFoundException { - ConstPool cp = getConstPool(); - int index = iterator.u16bitAt(currentPos + 1); - String desc = cp.getMethodrefType(index); - return Descriptor.getParameterTypes(desc, thisClass.getClassPool()); - } - */ - - private int canReplace() throws CannotCompileException { - int op = iterator.byteAt(newPos + 3); - if (op == Opcode.DUP) // Typical single DUP or Javaflow DUP DUP2_X2 POP2 - return ((iterator.byteAt(newPos + 4) == Opcode.DUP2_X2 - && iterator.byteAt(newPos + 5) == Opcode.POP2)) ? 6 : 4; - else if (op == Opcode.DUP_X1 - && iterator.byteAt(newPos + 4) == Opcode.SWAP) - return 5; - else - return 3; // for Eclipse. The generated code may include no DUP. - // throw new CannotCompileException( - // "sorry, cannot edit NEW followed by no DUP"); - } - - /** - * Replaces the new expression with the bytecode derived from - * the given source text. - * - *

$0 is available but the value is null. - * - * @param statement a Java statement except try-catch. - */ - public void replace(String statement) throws CannotCompileException { - thisClass.getClassFile(); // to call checkModify(). - - final int bytecodeSize = 3; - int pos = newPos; - - int newIndex = iterator.u16bitAt(pos + 1); - - /* delete the preceding NEW and DUP (or DUP_X1, SWAP) instructions. - */ - int codeSize = canReplace(); - int end = pos + codeSize; - for (int i = pos; i < end; ++i) - iterator.writeByte(NOP, i); - - ConstPool constPool = getConstPool(); - pos = currentPos; - int methodIndex = iterator.u16bitAt(pos + 1); // constructor - - String signature = constPool.getMethodrefType(methodIndex); - - Javac jc = new Javac(thisClass); - ClassPool cp = thisClass.getClassPool(); - CodeAttribute ca = iterator.get(); - try { - CtClass[] params = Descriptor.getParameterTypes(signature, cp); - CtClass newType = cp.get(newTypeName); - int paramVar = ca.getMaxLocals(); - jc.recordParams(newTypeName, params, - true, paramVar, withinStatic()); - int retVar = jc.recordReturnType(newType, true); - jc.recordProceed(new ProceedForNew(newType, newIndex, - methodIndex)); - - /* Is $_ included in the source code? - */ - checkResultValue(newType, statement); - - Bytecode bytecode = jc.getBytecode(); - storeStack(params, true, paramVar, bytecode); - jc.recordLocalVariables(ca, pos); - - bytecode.addConstZero(newType); - bytecode.addStore(retVar, newType); // initialize $_ - - jc.compileStmnt(statement); - if (codeSize > 3) // if the original code includes DUP. - bytecode.addAload(retVar); - - replace0(pos, bytecode, bytecodeSize); - } - catch (CompileError e) { throw new CannotCompileException(e); } - catch (NotFoundException e) { throw new CannotCompileException(e); } - catch (BadBytecode e) { - throw new CannotCompileException("broken method"); - } - } - - static class ProceedForNew implements ProceedHandler { - CtClass newType; - int newIndex, methodIndex; - - ProceedForNew(CtClass nt, int ni, int mi) { - newType = nt; - newIndex = ni; - methodIndex = mi; - } - - public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) - throws CompileError - { - bytecode.addOpcode(NEW); - bytecode.addIndex(newIndex); - bytecode.addOpcode(DUP); - gen.atMethodCallCore(newType, MethodInfo.nameInit, args, - false, true, -1, null); - gen.setType(newType); - } - - public void setReturnType(JvstTypeChecker c, ASTList args) - throws CompileError - { - c.atMethodCallCore(newType, MethodInfo.nameInit, args); - c.setType(newType); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/expr/package.html b/src/com/wenshuo/agent/javassist/expr/package.html deleted file mode 100644 index 12a2c63..0000000 --- a/src/com/wenshuo/agent/javassist/expr/package.html +++ /dev/null @@ -1,8 +0,0 @@ - - - -

This package contains the classes for modifying a method body. -See ExprEditor (expression editor) for more details. - - - diff --git a/src/com/wenshuo/agent/javassist/package.html b/src/com/wenshuo/agent/javassist/package.html deleted file mode 100644 index f5b66b9..0000000 --- a/src/com/wenshuo/agent/javassist/package.html +++ /dev/null @@ -1,22 +0,0 @@ - - -The Javassist Core API. - -

Javassist (Java programming assistant) makes bytecode -engineering simple. It is a class library for editing -bytecode in Java; it enables Java programs to define a new class at -runtime and to modify a given class file when the JVM loads it. - -

The most significant class of this package is CtClass. -See the description of this class first. - -

To know the version number of this package, type the following command: - -

    -java -jar javassist.jar
-
- -

It prints the version number on the console. - - - diff --git a/src/com/wenshuo/agent/javassist/runtime/Cflow.java b/src/com/wenshuo/agent/javassist/runtime/Cflow.java deleted file mode 100644 index f2c7b6a..0000000 --- a/src/com/wenshuo/agent/javassist/runtime/Cflow.java +++ /dev/null @@ -1,53 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.runtime; - -/** - * A support class for implementing $cflow. - * This support class is required at runtime - * only if $cflow is used. - * - * @see javassist.CtBehavior#useCflow(String) - */ -public class Cflow extends ThreadLocal { - private static class Depth { - private int depth; - Depth() { depth = 0; } - int get() { return depth; } - void inc() { ++depth; } - void dec() { --depth; } - } - - protected synchronized Object initialValue() { - return new Depth(); - } - - /** - * Increments the counter. - */ - public void enter() { ((Depth)get()).inc(); } - - /** - * Decrements the counter. - */ - public void exit() { ((Depth)get()).dec(); } - - /** - * Returns the value of the counter. - */ - public int value() { return ((Depth)get()).get(); } -} diff --git a/src/com/wenshuo/agent/javassist/runtime/Desc.java b/src/com/wenshuo/agent/javassist/runtime/Desc.java deleted file mode 100644 index e8ed8bf..0000000 --- a/src/com/wenshuo/agent/javassist/runtime/Desc.java +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.runtime; - -/** - * A support class for implementing $sig and - * $type. - * This support class is required at runtime - * only if $sig or $type is used. - */ -public class Desc { - - /** - * Specifies how a java.lang.Class object is loaded. - * - *

If true, it is loaded by: - * 

Thread.currentThread().getContextClassLoader().loadClass()
- *

If false, it is loaded by Class.forName(). - * The default value is false. - */ - public static boolean useContextClassLoader = false; - - private static Class getClassObject(String name) - throws ClassNotFoundException - { - if (useContextClassLoader) - return Class.forName(name, true, Thread.currentThread().getContextClassLoader()); - else - return Class.forName(name); - } - - /** - * Interprets the given class name. - * It is used for implementing $class. - */ - public static Class getClazz(String name) { - try { - return getClassObject(name); - } - catch (ClassNotFoundException e) { - throw new RuntimeException( - "$class: internal error, could not find class '" + name - + "' (Desc.useContextClassLoader: " - + Boolean.toString(useContextClassLoader) + ")", e); - } - } - - /** - * Interprets the given type descriptor representing a method - * signature. It is used for implementing $sig. - */ - public static Class[] getParams(String desc) { - if (desc.charAt(0) != '(') - throw new RuntimeException("$sig: internal error"); - - return getType(desc, desc.length(), 1, 0); - } - - /** - * Interprets the given type descriptor. - * It is used for implementing $type. - */ - public static Class getType(String desc) { - Class[] result = getType(desc, desc.length(), 0, 0); - if (result == null || result.length != 1) - throw new RuntimeException("$type: internal error"); - - return result[0]; - } - - private static Class[] getType(String desc, int descLen, - int start, int num) { - Class clazz; - if (start >= descLen) - return new Class[num]; - - char c = desc.charAt(start); - switch (c) { - case 'Z' : - clazz = Boolean.TYPE; - break; - case 'C' : - clazz = Character.TYPE; - break; - case 'B' : - clazz = Byte.TYPE; - break; - case 'S' : - clazz = Short.TYPE; - break; - case 'I' : - clazz = Integer.TYPE; - break; - case 'J' : - clazz = Long.TYPE; - break; - case 'F' : - clazz = Float.TYPE; - break; - case 'D' : - clazz = Double.TYPE; - break; - case 'V' : - clazz = Void.TYPE; - break; - case 'L' : - case '[' : - return getClassType(desc, descLen, start, num); - default : - return new Class[num]; - } - - Class[] result = getType(desc, descLen, start + 1, num + 1); - result[num] = clazz; - return result; - } - - private static Class[] getClassType(String desc, int descLen, - int start, int num) { - int end = start; - while (desc.charAt(end) == '[') - ++end; - - if (desc.charAt(end) == 'L') { - end = desc.indexOf(';', end); - if (end < 0) - throw new IndexOutOfBoundsException("bad descriptor"); - } - - String cname; - if (desc.charAt(start) == 'L') - cname = desc.substring(start + 1, end); - else - cname = desc.substring(start, end + 1); - - Class[] result = getType(desc, descLen, end + 1, num + 1); - try { - result[num] = getClassObject(cname.replace('/', '.')); - } - catch (ClassNotFoundException e) { - // "new RuntimeException(e)" is not available in JDK 1.3. - throw new RuntimeException(e.getMessage()); - } - - return result; - } -} diff --git a/src/com/wenshuo/agent/javassist/runtime/DotClass.java b/src/com/wenshuo/agent/javassist/runtime/DotClass.java deleted file mode 100644 index e3adef4..0000000 --- a/src/com/wenshuo/agent/javassist/runtime/DotClass.java +++ /dev/null @@ -1,29 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.runtime; - -/** - * A support class for implementing .class notation. - * This is required at runtime - * only if .class notation is used in source code given - * to the Javassist compiler. - */ -public class DotClass { - public static NoClassDefFoundError fail(ClassNotFoundException e) { - return new NoClassDefFoundError(e.getMessage()); - } -} diff --git a/src/com/wenshuo/agent/javassist/runtime/Inner.java b/src/com/wenshuo/agent/javassist/runtime/Inner.java deleted file mode 100644 index e51ab88..0000000 --- a/src/com/wenshuo/agent/javassist/runtime/Inner.java +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.runtime; - -/** - * A support class for compiling a method declared in an inner class. - * This support class is required at runtime - * only if the method calls a private constructor in the enclosing class. - */ -public class Inner { -} diff --git a/src/com/wenshuo/agent/javassist/runtime/package.html b/src/com/wenshuo/agent/javassist/runtime/package.html deleted file mode 100644 index 313648f..0000000 --- a/src/com/wenshuo/agent/javassist/runtime/package.html +++ /dev/null @@ -1,12 +0,0 @@ - - -Runtime support classes required by modified bytecode. - -

This package includes support classes that may be required by -classes modified with Javassist. Note that most of the modified -classes do not require these support classes. See the documentation -of every support class to know which kind of modification needs -a support class. - - - diff --git a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java b/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java deleted file mode 100644 index ce0dbd8..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java +++ /dev/null @@ -1,309 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import java.lang.ref.WeakReference; -import java.security.ProtectionDomain; -import java.util.Iterator; -import java.util.Map; -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.LoaderClassPath; -import com.wenshuo.agent.javassist.NotFoundException; - -/** - * A scoped class pool. - * - * @author Bill Burke - * @author Adrian Brock - * @author Kabir Khan - * @version $Revision: 1.8 $ - */ -public class ScopedClassPool extends ClassPool { - protected ScopedClassPoolRepository repository; - - protected WeakReference classLoader; - - protected LoaderClassPath classPath; - - protected SoftValueHashMap softcache = new SoftValueHashMap(); - - boolean isBootstrapCl = true; - - static { - ClassPool.doPruning = false; - ClassPool.releaseUnmodifiedClassFile = false; - } - - /** - * Create a new ScopedClassPool. - * - * @param cl - * the classloader - * @param src - * the original class pool - * @param repository - * the repository - *@deprecated - */ - protected ScopedClassPool(ClassLoader cl, ClassPool src, - ScopedClassPoolRepository repository) { - this(cl, src, repository, false); - } - - /** - * Create a new ScopedClassPool. - * - * @param cl - * the classloader - * @param src - * the original class pool - * @param repository - * the repository - * @param isTemp - * Whether this is a temporary pool used to resolve references - */ - protected ScopedClassPool(ClassLoader cl, ClassPool src, ScopedClassPoolRepository repository, boolean isTemp) - { - super(src); - this.repository = repository; - this.classLoader = new WeakReference(cl); - if (cl != null) { - classPath = new LoaderClassPath(cl); - this.insertClassPath(classPath); - } - childFirstLookup = true; - if (!isTemp && cl == null) - { - isBootstrapCl = true; - } - } - - /** - * Get the class loader - * - * @return the class loader - */ - public ClassLoader getClassLoader() { - ClassLoader cl = getClassLoader0(); - if (cl == null && !isBootstrapCl) - { - throw new IllegalStateException( - "ClassLoader has been garbage collected"); - } - return cl; - } - - protected ClassLoader getClassLoader0() { - return (ClassLoader)classLoader.get(); - } - - /** - * Close the class pool - */ - public void close() { - this.removeClassPath(classPath); - classPath.close(); - classes.clear(); - softcache.clear(); - } - - /** - * Flush a class - * - * @param classname - * the class to flush - */ - public synchronized void flushClass(String classname) { - classes.remove(classname); - softcache.remove(classname); - } - - /** - * Soften a class - * - * @param clazz - * the class - */ - public synchronized void soften(CtClass clazz) { - if (repository.isPrune()) - clazz.prune(); - classes.remove(clazz.getName()); - softcache.put(clazz.getName(), clazz); - } - - /** - * Whether the classloader is loader - * - * @return false always - */ - public boolean isUnloadedClassLoader() { - return false; - } - - /** - * Get the cached class - * - * @param classname - * the class name - * @return the class - */ - protected CtClass getCached(String classname) { - CtClass clazz = getCachedLocally(classname); - if (clazz == null) { - boolean isLocal = false; - - ClassLoader dcl = getClassLoader0(); - if (dcl != null) { - final int lastIndex = classname.lastIndexOf('$'); - String classResourceName = null; - if (lastIndex < 0) { - classResourceName = classname.replaceAll("[\\.]", "/") - + ".class"; - } - else { - classResourceName = classname.substring(0, lastIndex) - .replaceAll("[\\.]", "/") - + classname.substring(lastIndex) + ".class"; - } - - isLocal = dcl.getResource(classResourceName) != null; - } - - if (!isLocal) { - Map registeredCLs = repository.getRegisteredCLs(); - synchronized (registeredCLs) { - Iterator it = registeredCLs.values().iterator(); - while (it.hasNext()) { - ScopedClassPool pool = (ScopedClassPool)it.next(); - if (pool.isUnloadedClassLoader()) { - repository.unregisterClassLoader(pool - .getClassLoader()); - continue; - } - - clazz = pool.getCachedLocally(classname); - if (clazz != null) { - return clazz; - } - } - } - } - } - // *NOTE* NEED TO TEST WHEN SUPERCLASS IS IN ANOTHER UCL!!!!!! - return clazz; - } - - /** - * Cache a class - * - * @param classname - * the class name - * @param c - * the ctClass - * @param dynamic - * whether the class is dynamically generated - */ - protected void cacheCtClass(String classname, CtClass c, boolean dynamic) { - if (dynamic) { - super.cacheCtClass(classname, c, dynamic); - } - else { - if (repository.isPrune()) - c.prune(); - softcache.put(classname, c); - } - } - - /** - * Lock a class into the cache - * - * @param c - * the class - */ - public void lockInCache(CtClass c) { - super.cacheCtClass(c.getName(), c, false); - } - - /** - * Whether the class is cached in this pooled - * - * @param classname - * the class name - * @return the cached class - */ - protected CtClass getCachedLocally(String classname) { - CtClass cached = (CtClass)classes.get(classname); - if (cached != null) - return cached; - synchronized (softcache) { - return (CtClass)softcache.get(classname); - } - } - - /** - * Get any local copy of the class - * - * @param classname - * the class name - * @return the class - * @throws NotFoundException - * when the class is not found - */ - public synchronized CtClass getLocally(String classname) - throws NotFoundException { - softcache.remove(classname); - CtClass clazz = (CtClass)classes.get(classname); - if (clazz == null) { - clazz = createCtClass(classname, true); - if (clazz == null) - throw new NotFoundException(classname); - super.cacheCtClass(classname, clazz, false); - } - - return clazz; - } - - /** - * Convert a javassist class to a java class - * - * @param ct - * the javassist class - * @param loader - * the loader - * @throws CannotCompileException - * for any error - */ - public Class toClass(CtClass ct, ClassLoader loader, ProtectionDomain domain) - throws CannotCompileException { - // We need to pass up the classloader stored in this pool, as the - // default implementation uses the Thread context cl. - // In the case of JSP's in Tomcat, - // org.apache.jasper.servlet.JasperLoader will be stored here, while - // it's parent - // org.jboss.web.tomcat.tc5.WebCtxLoader$ENCLoader is used as the Thread - // context cl. The invocation class needs to - // be generated in the JasperLoader classloader since in the case of - // method invocations, the package name will be - // the same as for the class generated from the jsp, i.e. - // org.apache.jsp. For classes belonging to org.apache.jsp, - // JasperLoader does NOT delegate to its parent if it cannot find them. - lockInCache(ct); - return super.toClass(ct, getClassLoader0(), domain); - } -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java b/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java deleted file mode 100644 index 2dd05b4..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import com.wenshuo.agent.javassist.ClassPool; - -/** - * A factory interface. - * - * @author Kabir Khan - * @version $Revision: 1.4 $ - */ -public interface ScopedClassPoolFactory { - /** - * Makes an instance. - */ - ScopedClassPool create(ClassLoader cl, ClassPool src, - ScopedClassPoolRepository repository); - - /** - * Makes an instance. - */ - ScopedClassPool create(ClassPool src, - ScopedClassPoolRepository repository); -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java b/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java deleted file mode 100644 index 1386fff..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java +++ /dev/null @@ -1,43 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import com.wenshuo.agent.javassist.ClassPool; - -/** - * An implementation of factory. - * - * @author Kabir Khan - * @version $Revision: 1.5 $ - */ -public class ScopedClassPoolFactoryImpl implements ScopedClassPoolFactory { - /** - * Makes an instance. - */ - public ScopedClassPool create(ClassLoader cl, ClassPool src, - ScopedClassPoolRepository repository) { - return new ScopedClassPool(cl, src, repository, false); - } - - /** - * Makes an instance. - */ - public ScopedClassPool create(ClassPool src, - ScopedClassPoolRepository repository) { - return new ScopedClassPool(null, src, repository, true); - } -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java b/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java deleted file mode 100644 index 4965cff..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java +++ /dev/null @@ -1,98 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import java.util.Map; - -import com.wenshuo.agent.javassist.ClassPool; - -/** - * An interface to ScopedClassPoolRepositoryImpl. - * - * @author Kabir Khan - * @version $Revision: 1.4 $ - */ -public interface ScopedClassPoolRepository { - /** - * Records a factory. - */ - void setClassPoolFactory(ScopedClassPoolFactory factory); - - /** - * Obtains the recorded factory. - */ - ScopedClassPoolFactory getClassPoolFactory(); - - /** - * Returns whether or not the class pool is pruned. - * - * @return the prune. - */ - boolean isPrune(); - - /** - * Sets the prune flag. - * - * @param prune a new value. - */ - void setPrune(boolean prune); - - /** - * Create a scoped classpool. - * - * @param cl the classloader. - * @param src the original classpool. - * @return the classpool. - */ - ScopedClassPool createScopedClassPool(ClassLoader cl, ClassPool src); - - /** - * Finds a scoped classpool registered under the passed in classloader. - * - * @param cl the classloader. - * @return the classpool. - */ - ClassPool findClassPool(ClassLoader cl); - - /** - * Register a classloader. - * - * @param ucl the classloader. - * @return the classpool. - */ - ClassPool registerClassLoader(ClassLoader ucl); - - /** - * Get the registered classloaders. - * - * @return the registered classloaders. - */ - Map getRegisteredCLs(); - - /** - * This method will check to see if a register classloader has been - * undeployed (as in JBoss). - */ - void clearUnregisteredClassLoaders(); - - /** - * Unregisters a classpool and unregisters its classloader. - * - * @param cl the classloader the pool is stored under. - */ - void unregisterClassLoader(ClassLoader cl); -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java b/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java deleted file mode 100644 index 3f0e5ae..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java +++ /dev/null @@ -1,188 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import java.util.ArrayList; -import java.util.Collections; -import java.util.Iterator; -import java.util.Map; -import java.util.WeakHashMap; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.LoaderClassPath; - -/** - * An implementation of ScopedClassPoolRepository. - * It is an singleton. - * - * @author Kabir Khan - * @version $Revision: 1.4 $ - */ -public class ScopedClassPoolRepositoryImpl implements ScopedClassPoolRepository { - /** The instance */ - private static final ScopedClassPoolRepositoryImpl instance = new ScopedClassPoolRepositoryImpl(); - - /** Whether to prune */ - private boolean prune = true; - - /** Whether to prune when added to the classpool's cache */ - boolean pruneWhenCached; - - /** The registered classloaders */ - protected Map registeredCLs = Collections - .synchronizedMap(new WeakHashMap()); - - /** The default class pool */ - protected ClassPool classpool; - - /** The factory for creating class pools */ - protected ScopedClassPoolFactory factory = new ScopedClassPoolFactoryImpl(); - - /** - * Get the instance. - * - * @return the instance. - */ - public static ScopedClassPoolRepository getInstance() { - return instance; - } - - /** - * Singleton. - */ - private ScopedClassPoolRepositoryImpl() { - classpool = ClassPool.getDefault(); - // FIXME This doesn't look correct - ClassLoader cl = Thread.currentThread().getContextClassLoader(); - classpool.insertClassPath(new LoaderClassPath(cl)); - } - - /** - * Returns the value of the prune attribute. - * - * @return the prune. - */ - public boolean isPrune() { - return prune; - } - - /** - * Set the prune attribute. - * - * @param prune a new value. - */ - public void setPrune(boolean prune) { - this.prune = prune; - } - - /** - * Create a scoped classpool. - * - * @param cl the classloader. - * @param src the original classpool. - * @return the classpool - */ - public ScopedClassPool createScopedClassPool(ClassLoader cl, ClassPool src) { - return factory.create(cl, src, this); - } - - public ClassPool findClassPool(ClassLoader cl) { - if (cl == null) - return registerClassLoader(ClassLoader.getSystemClassLoader()); - - return registerClassLoader(cl); - } - - /** - * Register a classloader. - * - * @param ucl the classloader. - * @return the classpool - */ - public ClassPool registerClassLoader(ClassLoader ucl) { - synchronized (registeredCLs) { - // FIXME: Probably want to take this method out later - // so that AOP framework can be independent of JMX - // This is in here so that we can remove a UCL from the ClassPool as - // a - // ClassPool.classpath - if (registeredCLs.containsKey(ucl)) { - return (ClassPool)registeredCLs.get(ucl); - } - ScopedClassPool pool = createScopedClassPool(ucl, classpool); - registeredCLs.put(ucl, pool); - return pool; - } - } - - /** - * Get the registered classloaders. - */ - public Map getRegisteredCLs() { - clearUnregisteredClassLoaders(); - return registeredCLs; - } - - /** - * This method will check to see if a register classloader has been - * undeployed (as in JBoss) - */ - public void clearUnregisteredClassLoaders() { - ArrayList toUnregister = null; - synchronized (registeredCLs) { - Iterator it = registeredCLs.values().iterator(); - while (it.hasNext()) { - ScopedClassPool pool = (ScopedClassPool)it.next(); - if (pool.isUnloadedClassLoader()) { - it.remove(); - ClassLoader cl = pool.getClassLoader(); - if (cl != null) { - if (toUnregister == null) { - toUnregister = new ArrayList(); - } - toUnregister.add(cl); - } - } - } - if (toUnregister != null) { - for (int i = 0; i < toUnregister.size(); i++) { - unregisterClassLoader((ClassLoader)toUnregister.get(i)); - } - } - } - } - - public void unregisterClassLoader(ClassLoader cl) { - synchronized (registeredCLs) { - ScopedClassPool pool = (ScopedClassPool)registeredCLs.remove(cl); - if (pool != null) - pool.close(); - } - } - - public void insertDelegate(ScopedClassPoolRepository delegate) { - // Noop - this is the end - } - - public void setClassPoolFactory(ScopedClassPoolFactory factory) { - this.factory = factory; - } - - public ScopedClassPoolFactory getClassPoolFactory() { - return factory; - } -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java b/src/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java deleted file mode 100644 index 3743ca6..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.scopedpool; - -import java.lang.ref.ReferenceQueue; -import java.lang.ref.SoftReference; -import java.util.AbstractMap; -import java.util.HashMap; -import java.util.Map; -import java.util.Set; - -/** - * This Map will remove entries when the value in the map has been cleaned from - * garbage collection - * - * @version $Revision: 1.4 $ - * @author Bill Burke - */ -public class SoftValueHashMap extends AbstractMap implements Map { - private static class SoftValueRef extends SoftReference { - public Object key; - - private SoftValueRef(Object key, Object val, ReferenceQueue q) { - super(val, q); - this.key = key; - } - - private static SoftValueRef create(Object key, Object val, - ReferenceQueue q) { - if (val == null) - return null; - else - return new SoftValueRef(key, val, q); - } - - } - - /** - * Returns a set of the mappings contained in this hash table. - */ - public Set entrySet() { - processQueue(); - return hash.entrySet(); - } - - /* Hash table mapping WeakKeys to values */ - private Map hash; - - /* Reference queue for cleared WeakKeys */ - private ReferenceQueue queue = new ReferenceQueue(); - - /* - * Remove all invalidated entries from the map, that is, remove all entries - * whose values have been discarded. - */ - private void processQueue() { - SoftValueRef ref; - while ((ref = (SoftValueRef)queue.poll()) != null) { - if (ref == (SoftValueRef)hash.get(ref.key)) { - // only remove if it is the *exact* same WeakValueRef - // - hash.remove(ref.key); - } - } - } - - /* -- Constructors -- */ - - /** - * Constructs a new, empty WeakHashMap with the given initial - * capacity and the given load factor. - * - * @param initialCapacity - * The initial capacity of the WeakHashMap - * - * @param loadFactor - * The load factor of the WeakHashMap - * - * @throws IllegalArgumentException - * If the initial capacity is less than zero, or if the load - * factor is nonpositive - */ - public SoftValueHashMap(int initialCapacity, float loadFactor) { - hash = new HashMap(initialCapacity, loadFactor); - } - - /** - * Constructs a new, empty WeakHashMap with the given initial - * capacity and the default load factor, which is 0.75. - * - * @param initialCapacity - * The initial capacity of the WeakHashMap - * - * @throws IllegalArgumentException - * If the initial capacity is less than zero - */ - public SoftValueHashMap(int initialCapacity) { - hash = new HashMap(initialCapacity); - } - - /** - * Constructs a new, empty WeakHashMap with the default - * initial capacity and the default load factor, which is 0.75. - */ - public SoftValueHashMap() { - hash = new HashMap(); - } - - /** - * Constructs a new WeakHashMap with the same mappings as the - * specified Map. The WeakHashMap is created with - * an initial capacity of twice the number of mappings in the specified map - * or 11 (whichever is greater), and a default load factor, which is - * 0.75. - * - * @param t the map whose mappings are to be placed in this map. - */ - public SoftValueHashMap(Map t) { - this(Math.max(2 * t.size(), 11), 0.75f); - putAll(t); - } - - /* -- Simple queries -- */ - - /** - * Returns the number of key-value mappings in this map. Note: - * In contrast with most implementations of the - * Map interface, the time required by this operation is - * linear in the size of the map. - */ - public int size() { - processQueue(); - return hash.size(); - } - - /** - * Returns true if this map contains no key-value mappings. - */ - public boolean isEmpty() { - processQueue(); - return hash.isEmpty(); - } - - /** - * Returns true if this map contains a mapping for the - * specified key. - * - * @param key - * The key whose presence in this map is to be tested. - */ - public boolean containsKey(Object key) { - processQueue(); - return hash.containsKey(key); - } - - /* -- Lookup and modification operations -- */ - - /** - * Returns the value to which this map maps the specified key. - * If this map does not contain a value for this key, then return - * null. - * - * @param key - * The key whose associated value, if any, is to be returned. - */ - public Object get(Object key) { - processQueue(); - SoftReference ref = (SoftReference)hash.get(key); - if (ref != null) - return ref.get(); - return null; - } - - /** - * Updates this map so that the given key maps to the given - * value. If the map previously contained a mapping for - * key then that mapping is replaced and the previous value - * is returned. - * - * @param key - * The key that is to be mapped to the given value - * @param value - * The value to which the given key is to be - * mapped - * - * @return The previous value to which this key was mapped, or - * null if if there was no mapping for the key - */ - public Object put(Object key, Object value) { - processQueue(); - Object rtn = hash.put(key, SoftValueRef.create(key, value, queue)); - if (rtn != null) - rtn = ((SoftReference)rtn).get(); - return rtn; - } - - /** - * Removes the mapping for the given key from this map, if - * present. - * - * @param key - * The key whose mapping is to be removed. - * - * @return The value to which this key was mapped, or null if - * there was no mapping for the key. - */ - public Object remove(Object key) { - processQueue(); - return hash.remove(key); - } - - /** - * Removes all mappings from this map. - */ - public void clear() { - processQueue(); - hash.clear(); - } -} diff --git a/src/com/wenshuo/agent/javassist/scopedpool/package.html b/src/com/wenshuo/agent/javassist/scopedpool/package.html deleted file mode 100644 index 946e5e1..0000000 --- a/src/com/wenshuo/agent/javassist/scopedpool/package.html +++ /dev/null @@ -1,7 +0,0 @@ - - -

A custom class pool for several JBoss products. -It is not part of Javassist. -

- - diff --git a/src/com/wenshuo/agent/javassist/tools/Callback.java b/src/com/wenshuo/agent/javassist/tools/Callback.java deleted file mode 100644 index 56ba4fb..0000000 --- a/src/com/wenshuo/agent/javassist/tools/Callback.java +++ /dev/null @@ -1,152 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.CtBehavior; - -import java.util.HashMap; -import java.util.UUID; - -/** - * Creates bytecode that when executed calls back to the instance's result method. - * - *

Example of how to create and insert a callback:

- * 
- * ctMethod.insertAfter(new Callback("Thread.currentThread()") {
- *     public void result(Object... objects) {
- *         Thread thread = (Thread) objects[0];
- *         // do something with thread...
- *     }
- * }.sourceCode());
- *
- *

Contains utility methods for inserts callbacks in CtBehaviour, example:

- * 
- * insertAfter(ctBehaviour, new Callback("Thread.currentThread(), dummyString") {
- *     public void result(Object... objects) {
- *         Thread thread = (Thread) objects[0];
- *         // do something with thread...
- *     }
- * });
- *
- * - * @author Marten Hedborg - */ -public abstract class Callback { - - public static HashMap callbacks = new HashMap(); - - private final String sourceCode; - - /** - * Constructs a new Callback object. - * - * @param src The source code representing the inserted callback bytecode. - * Can be one or many single statements each returning one object. - * If many single statements are used they must be comma separated. - */ - public Callback(String src){ - String uuid = UUID.randomUUID().toString(); - callbacks.put(uuid, this); - sourceCode = "((javassist.tools.Callback) javassist.tools.Callback.callbacks.get(\""+uuid+"\")).result(new Object[]{"+src+"});"; - } - - /** - * Gets called when bytecode is executed - * - * @param objects Objects that the bytecode in callback returns - */ - public abstract void result(Object... objects); - - @Override - public String toString(){ - return sourceCode(); - } - - public String sourceCode(){ - return sourceCode; - } - - /** - * Utility method to insert callback at the beginning of the body. - * - * @param callback The callback - * - * @see CtBehavior#insertBefore(String) - */ - public static void insertBefore(CtBehavior behavior, Callback callback) - throws CannotCompileException - { - behavior.insertBefore(callback.toString()); - } - - /** - * Utility method to inserts callback at the end of the body. - * The callback is inserted just before every return instruction. - * It is not executed when an exception is thrown. - * - * @param behavior The behaviour to insert callback in - * @param callback The callback - * - * @see CtBehavior#insertAfter(String, boolean) - */ - public static void insertAfter(CtBehavior behavior,Callback callback) - throws CannotCompileException - { - behavior.insertAfter(callback.toString(), false); - } - - /** - * Utility method to inserts callback at the end of the body. - * The callback is inserted just before every return instruction. - * It is not executed when an exception is thrown. - * - * @param behavior The behaviour to insert callback in - * @param callback The callback representing the inserted. - * @param asFinally True if the inserted is executed - * Not only when the control normally returns - * but also when an exception is thrown. - * If this parameter is true, the inserted code cannot - * access local variables. - * - * @see CtBehavior#insertAfter(String, boolean) - */ - public static void insertAfter(CtBehavior behavior, Callback callback, boolean asFinally) - throws CannotCompileException - { - behavior.insertAfter(callback.toString(), asFinally); - } - - /** - * Utility method to inserts callback at the specified line in the body. - * - * @param behavior The behaviour to insert callback in - * @param callback The callback representing. - * @param lineNum The line number. The callback is inserted at the - * beginning of the code at the line specified by this - * line number. - * - * @return The line number at which the callback has been inserted. - * - * @see CtBehavior#insertAt(int, String) - */ - public static int insertAt(CtBehavior behavior, Callback callback, int lineNum) - throws CannotCompileException - { - return behavior.insertAt(lineNum, callback.toString()); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/Dump.java b/src/com/wenshuo/agent/javassist/tools/Dump.java deleted file mode 100644 index 8a504ee..0000000 --- a/src/com/wenshuo/agent/javassist/tools/Dump.java +++ /dev/null @@ -1,58 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools; - -import java.io.*; -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.ClassFilePrinter; - -/** - * Dump is a tool for viewing the class definition in the given - * class file. Unlike the JDK javap tool, Dump works even if - * the class file is broken. - * - *

For example, - * 

% java javassist.tools.Dump foo.class
- * - *

prints the contents of the constant pool and the list of methods - * and fields. - */ -public class Dump { - private Dump() {} - - /** - * Main method. - * - * @param args args[0] is the class file name. - */ - public static void main(String[] args) throws Exception { - if (args.length != 1) { - System.err.println("Usage: java Dump "); - return; - } - - DataInputStream in = new DataInputStream( - new FileInputStream(args[0])); - ClassFile w = new ClassFile(in); - PrintWriter out = new PrintWriter(System.out, true); - out.println("*** constant pool ***"); - w.getConstPool().print(out); - out.println(); - out.println("*** members ***"); - ClassFilePrinter.print(w, out); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/framedump.java b/src/com/wenshuo/agent/javassist/tools/framedump.java deleted file mode 100644 index 623ffc3..0000000 --- a/src/com/wenshuo/agent/javassist/tools/framedump.java +++ /dev/null @@ -1,48 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.tools; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.bytecode.analysis.FramePrinter; - -/** - * framedump is a tool for viewing a merged combination of the instructions and frame state - * of all methods in a class. - * - *

For example, - * 

% java javassist.tools.framedump foo.class
- */ -public class framedump { - private framedump() {} - - /** - * Main method. - * - * @param args args[0] is the class file name. - */ - public static void main(String[] args) throws Exception { - if (args.length != 1) { - System.err.println("Usage: java javassist.tools.framedump "); - return; - } - - ClassPool pool = ClassPool.getDefault(); - CtClass clazz = pool.get(args[0]); - System.out.println("Frame Dump of " + clazz.getName() + ":"); - FramePrinter.print(clazz, System.out); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/package.html b/src/com/wenshuo/agent/javassist/tools/package.html deleted file mode 100644 index bee6208..0000000 --- a/src/com/wenshuo/agent/javassist/tools/package.html +++ /dev/null @@ -1,6 +0,0 @@ - - -Covenient tools. - - - diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java b/src/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java deleted file mode 100644 index de3c782..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -/** - * Signals that ClassMetaobject.newInstance() fails. - */ -public class CannotCreateException extends Exception { - public CannotCreateException(String s) { - super(s); - } - - public CannotCreateException(Exception e) { - super("by " + e.toString()); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java b/src/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java deleted file mode 100644 index 7907022..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import java.lang.reflect.InvocationTargetException; -import java.lang.IllegalAccessException; - -/** - * Thrown when method invocation using the reflection API has thrown - * an exception. - * - * @see javassist.tools.reflect.Metaobject#trapMethodcall(int, Object[]) - * @see javassist.tools.reflect.ClassMetaobject#trapMethodcall(int, Object[]) - * @see javassist.tools.reflect.ClassMetaobject#invoke(Object, int, Object[]) - */ -public class CannotInvokeException extends RuntimeException { - - private Throwable err = null; - - /** - * Returns the cause of this exception. It may return null. - */ - public Throwable getReason() { return err; } - - /** - * Constructs a CannotInvokeException with an error message. - */ - public CannotInvokeException(String reason) { - super(reason); - } - - /** - * Constructs a CannotInvokeException with an InvocationTargetException. - */ - public CannotInvokeException(InvocationTargetException e) { - super("by " + e.getTargetException().toString()); - err = e.getTargetException(); - } - - /** - * Constructs a CannotInvokeException with an IllegalAccessException. - */ - public CannotInvokeException(IllegalAccessException e) { - super("by " + e.toString()); - err = e; - } - - /** - * Constructs a CannotInvokeException with an ClassNotFoundException. - */ - public CannotInvokeException(ClassNotFoundException e) { - super("by " + e.toString()); - err = e; - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java b/src/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java deleted file mode 100644 index f2673c9..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java +++ /dev/null @@ -1,35 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import com.wenshuo.agent.javassist.CannotCompileException; - -/** - * Thrown by makeReflective() in Reflection - * when there is an attempt to reflect - * a class that is either an interface or a subclass of - * either ClassMetaobject or Metaobject. - * - * @author Brett Randall - * @see javassist.tools.reflect.Reflection#makeReflective(CtClass,CtClass,CtClass) - * @see javassist.CannotCompileException - */ -public class CannotReflectException extends CannotCompileException { - public CannotReflectException(String msg) { - super(msg); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java b/src/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java deleted file mode 100644 index 78fb42f..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java +++ /dev/null @@ -1,370 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import java.lang.reflect.*; -import java.util.Arrays; -import java.io.Serializable; -import java.io.IOException; -import java.io.ObjectInputStream; -import java.io.ObjectOutputStream; - -/** - * A runtime class metaobject. - * - *

A ClassMetaobject is created for every - * class of reflective objects. It can be used to hold values - * shared among the reflective objects of the same class. - * - *

To obtain a class metaobject, calls _getClass() - * on a reflective object. For example, - * - * 

ClassMetaobject cm = ((Metalevel)reflectiveObject)._getClass();
- *
- * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.Metalevel - */ -public class ClassMetaobject implements Serializable { - /** - * The base-level methods controlled by a metaobject - * are renamed so that they begin with - * methodPrefix "_m_". - */ - static final String methodPrefix = "_m_"; - static final int methodPrefixLen = 3; - - private Class javaClass; - private Constructor[] constructors; - private Method[] methods; - - /** - * Specifies how a java.lang.Class object is loaded. - * - *

If true, it is loaded by: - * 

Thread.currentThread().getContextClassLoader().loadClass()
- *

If false, it is loaded by Class.forName(). - * The default value is false. - */ - public static boolean useContextClassLoader = false; - - /** - * Constructs a ClassMetaobject. - * - * @param params params[0] is the name of the class - * of the reflective objects. - */ - public ClassMetaobject(String[] params) - { - try { - javaClass = getClassObject(params[0]); - } - catch (ClassNotFoundException e) { - throw new RuntimeException("not found: " + params[0] - + ", useContextClassLoader: " - + Boolean.toString(useContextClassLoader), e); - } - - constructors = javaClass.getConstructors(); - methods = null; - } - - private void writeObject(ObjectOutputStream out) throws IOException { - out.writeUTF(javaClass.getName()); - } - - private void readObject(ObjectInputStream in) - throws IOException, ClassNotFoundException - { - javaClass = getClassObject(in.readUTF()); - constructors = javaClass.getConstructors(); - methods = null; - } - - private Class getClassObject(String name) throws ClassNotFoundException { - if (useContextClassLoader) - return Thread.currentThread().getContextClassLoader() - .loadClass(name); - else - return Class.forName(name); - } - - /** - * Obtains the java.lang.Class representing this class. - */ - public final Class getJavaClass() { - return javaClass; - } - - /** - * Obtains the name of this class. - */ - public final String getName() { - return javaClass.getName(); - } - - /** - * Returns true if obj is an instance of this class. - */ - public final boolean isInstance(Object obj) { - return javaClass.isInstance(obj); - } - - /** - * Creates a new instance of the class. - * - * @param args the arguments passed to the constructor. - */ - public final Object newInstance(Object[] args) - throws CannotCreateException - { - int n = constructors.length; - for (int i = 0; i < n; ++i) { - try { - return constructors[i].newInstance(args); - } - catch (IllegalArgumentException e) { - // try again - } - catch (InstantiationException e) { - throw new CannotCreateException(e); - } - catch (IllegalAccessException e) { - throw new CannotCreateException(e); - } - catch (InvocationTargetException e) { - throw new CannotCreateException(e); - } - } - - throw new CannotCreateException("no constructor matches"); - } - - /** - * Is invoked when static fields of the base-level - * class are read and the runtime system intercepts it. - * This method simply returns the value of the field. - * - *

Every subclass of this class should redefine this method. - */ - public Object trapFieldRead(String name) { - Class jc = getJavaClass(); - try { - return jc.getField(name).get(null); - } - catch (NoSuchFieldException e) { - throw new RuntimeException(e.toString()); - } - catch (IllegalAccessException e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Is invoked when static fields of the base-level - * class are modified and the runtime system intercepts it. - * This method simply sets the field to the given value. - * - *

Every subclass of this class should redefine this method. - */ - public void trapFieldWrite(String name, Object value) { - Class jc = getJavaClass(); - try { - jc.getField(name).set(null, value); - } - catch (NoSuchFieldException e) { - throw new RuntimeException(e.toString()); - } - catch (IllegalAccessException e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Invokes a method whose name begins with - * methodPrefix "_m_" and the identifier. - * - * @exception CannotInvokeException if the invocation fails. - */ - static public Object invoke(Object target, int identifier, Object[] args) - throws Throwable - { - Method[] allmethods = target.getClass().getMethods(); - int n = allmethods.length; - String head = methodPrefix + identifier; - for (int i = 0; i < n; ++i) - if (allmethods[i].getName().startsWith(head)) { - try { - return allmethods[i].invoke(target, args); - } catch (java.lang.reflect.InvocationTargetException e) { - throw e.getTargetException(); - } catch (java.lang.IllegalAccessException e) { - throw new CannotInvokeException(e); - } - } - - throw new CannotInvokeException("cannot find a method"); - } - - /** - * Is invoked when static methods of the base-level - * class are called and the runtime system intercepts it. - * This method simply executes the intercepted method invocation - * with the original parameters and returns the resulting value. - * - *

Every subclass of this class should redefine this method. - */ - public Object trapMethodcall(int identifier, Object[] args) - throws Throwable - { - try { - Method[] m = getReflectiveMethods(); - return m[identifier].invoke(null, args); - } - catch (java.lang.reflect.InvocationTargetException e) { - throw e.getTargetException(); - } - catch (java.lang.IllegalAccessException e) { - throw new CannotInvokeException(e); - } - } - - /** - * Returns an array of the methods defined on the given reflective - * object. This method is for the internal use only. - */ - public final Method[] getReflectiveMethods() { - if (methods != null) - return methods; - - Class baseclass = getJavaClass(); - Method[] allmethods = baseclass.getDeclaredMethods(); - int n = allmethods.length; - int[] index = new int[n]; - int max = 0; - for (int i = 0; i < n; ++i) { - Method m = allmethods[i]; - String mname = m.getName(); - if (mname.startsWith(methodPrefix)) { - int k = 0; - for (int j = methodPrefixLen;; ++j) { - char c = mname.charAt(j); - if ('0' <= c && c <= '9') - k = k * 10 + c - '0'; - else - break; - } - - index[i] = ++k; - if (k > max) - max = k; - } - } - - methods = new Method[max]; - for (int i = 0; i < n; ++i) - if (index[i] > 0) - methods[index[i] - 1] = allmethods[i]; - - return methods; - } - - /** - * Returns the java.lang.reflect.Method object representing - * the method specified by identifier. - * - *

Note that the actual method returned will be have an altered, - * reflective name i.e. _m_2_... - * - * @param identifier the identifier index - * given to trapMethodcall() etc. - * @see Metaobject#trapMethodcall(int,Object[]) - * @see #trapMethodcall(int,Object[]) - */ - public final Method getMethod(int identifier) { - return getReflectiveMethods()[identifier]; - } - - /** - * Returns the name of the method specified - * by identifier. - */ - public final String getMethodName(int identifier) { - String mname = getReflectiveMethods()[identifier].getName(); - int j = ClassMetaobject.methodPrefixLen; - for (;;) { - char c = mname.charAt(j++); - if (c < '0' || '9' < c) - break; - } - - return mname.substring(j); - } - - /** - * Returns an array of Class objects representing the - * formal parameter types of the method specified - * by identifier. - */ - public final Class[] getParameterTypes(int identifier) { - return getReflectiveMethods()[identifier].getParameterTypes(); - } - - /** - * Returns a Class objects representing the - * return type of the method specified by identifier. - */ - public final Class getReturnType(int identifier) { - return getReflectiveMethods()[identifier].getReturnType(); - } - - /** - * Returns the identifier index of the method, as identified by its - * original name. - * - *

This method is useful, in conjuction with - * {@link ClassMetaobject#getMethod(int)}, to obtain a quick reference - * to the original method in the reflected class (i.e. not the proxy - * method), using the original name of the method. - * - *

Written by Brett Randall and Shigeru Chiba. - * - * @param originalName The original name of the reflected method - * @param argTypes array of Class specifying the method signature - * @return the identifier index of the original method - * @throws NoSuchMethodException if the method does not exist - * - * @see ClassMetaobject#getMethod(int) - */ - public final int getMethodIndex(String originalName, Class[] argTypes) - throws NoSuchMethodException - { - Method[] mthds = getReflectiveMethods(); - for (int i = 0; i < mthds.length; i++) { - if (mthds[i] == null) - continue; - - // check name and parameter types match - if (getMethodName(i).equals(originalName) - && Arrays.equals(argTypes, mthds[i].getParameterTypes())) - return i; - } - - throw new NoSuchMethodException("Method " + originalName - + " not found"); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Compiler.java b/src/com/wenshuo/agent/javassist/tools/reflect/Compiler.java deleted file mode 100644 index 0953163..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Compiler.java +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.ClassPool; -import java.io.PrintStream; - -class CompiledClass { - public String classname; - public String metaobject; - public String classobject; -} - -/** - * A bytecode translator for reflection. - * - *

This translator directly modifies class files on a local disk so that - * the classes represented by those class files are reflective. - * After the modification, the class files can be run with the standard JVM - * without javassist.tools.reflect.Loader - * or any other user-defined class loader. - * - *

The modified class files are given as the command-line parameters, - * which are a sequence of fully-qualified class names followed by options: - * - *

-m classname : specifies the class of the - * metaobjects associated with instances of the class followed by - * this option. The default is javassit.reflect.Metaobject. - * - *

-c classname : specifies the class of the - * class metaobjects associated with instances of the class followed by - * this option. The default is javassit.reflect.ClassMetaobject. - * - *

If a class name is not followed by any options, the class indicated - * by that class name is not reflective. - * - *

For example, - * 

% java Compiler Dog -m MetaDog -c CMetaDog Cat -m MetaCat Cow
- *
- * - *

modifies class files Dog.class, Cat.class, - * and Cow.class. - * The metaobject of a Dog object is a MetaDog object and the class - * metaobject is a CMetaDog object. - * The metaobject of a Cat object is a MetaCat object but - * the class metaobject is a default one. - * Cow objects are not reflective. - * - *

Note that if the super class is also made reflective, it must be done - * before the sub class. - * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.ClassMetaobject - * @see javassist.tools.reflect.Reflection - */ -public class Compiler { - - public static void main(String[] args) throws Exception { - if (args.length == 0) { - help(System.err); - return; - } - - CompiledClass[] entries = new CompiledClass[args.length]; - int n = parse(args, entries); - - if (n < 1) { - System.err.println("bad parameter."); - return; - } - - processClasses(entries, n); - } - - private static void processClasses(CompiledClass[] entries, int n) - throws Exception - { - Reflection implementor = new Reflection(); - ClassPool pool = ClassPool.getDefault(); - implementor.start(pool); - - for (int i = 0; i < n; ++i) { - CtClass c = pool.get(entries[i].classname); - if (entries[i].metaobject != null - || entries[i].classobject != null) { - String metaobj, classobj; - - if (entries[i].metaobject == null) - metaobj = "javassist.tools.reflect.Metaobject"; - else - metaobj = entries[i].metaobject; - - if (entries[i].classobject == null) - classobj = "javassist.tools.reflect.ClassMetaobject"; - else - classobj = entries[i].classobject; - - if (!implementor.makeReflective(c, pool.get(metaobj), - pool.get(classobj))) - System.err.println("Warning: " + c.getName() - + " is reflective. It was not changed."); - - System.err.println(c.getName() + ": " + metaobj + ", " - + classobj); - } - else - System.err.println(c.getName() + ": not reflective"); - } - - for (int i = 0; i < n; ++i) { - implementor.onLoad(pool, entries[i].classname); - pool.get(entries[i].classname).writeFile(); - } - } - - private static int parse(String[] args, CompiledClass[] result) { - int n = -1; - for (int i = 0; i < args.length; ++i) { - String a = args[i]; - if (a.equals("-m")) - if (n < 0 || i + 1 > args.length) - return -1; - else - result[n].metaobject = args[++i]; - else if (a.equals("-c")) - if (n < 0 || i + 1 > args.length) - return -1; - else - result[n].classobject = args[++i]; - else if (a.charAt(0) == '-') - return -1; - else { - CompiledClass cc = new CompiledClass(); - cc.classname = a; - cc.metaobject = null; - cc.classobject = null; - result[++n] = cc; - } - } - - return n + 1; - } - - private static void help(PrintStream out) { - out.println("Usage: java javassist.tools.reflect.Compiler"); - out.println(" ( [-m ] [-c ])+"); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Loader.java b/src/com/wenshuo/agent/javassist/tools/reflect/Loader.java deleted file mode 100644 index 4b9d1e3..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Loader.java +++ /dev/null @@ -1,162 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.ClassPool; - -/** - * A class loader for reflection. - * - *

To run a program, say MyApp, - * including a reflective class, - * you must write a start-up program as follows: - * - * 

- * public class Main {
- *   public static void main(String[] args) throws Throwable {
- *     javassist.tools.reflect.Loader cl
- *         = (javassist.tools.reflect.Loader)Main.class.getClassLoader();
- *     cl.makeReflective("Person", "MyMetaobject",
- *                       "javassist.tools.reflect.ClassMetaobject");
- *     cl.run("MyApp", args);
- *   }
- * }
- *
- * - *

Then run this program as follows: - * - * 

% java javassist.tools.reflect.Loader Main arg1, ...
- * - *

This command runs Main.main() with arg1, ... - * and Main.main() runs MyApp.main() with - * arg1, ... - * The Person class is modified - * to be a reflective class. Method calls on a Person - * object are intercepted by an instance of MyMetaobject. - * - *

Also, you can run MyApp in a slightly different way: - * - * 

- * public class Main2 {
- *   public static void main(String[] args) throws Throwable {
- *     javassist.tools.reflect.Loader cl = new javassist.tools.reflect.Loader();
- *     cl.makeReflective("Person", "MyMetaobject",
- *                       "javassist.tools.reflect.ClassMetaobject");
- *     cl.run("MyApp", args);
- *   }
- * }
- *
- * - *

This program is run as follows: - * - * 

% java Main2 arg1, ...
- * - *

The difference from the former one is that the class Main - * is loaded by javassist.tools.reflect.Loader whereas the class - * Main2 is not. Thus, Main belongs - * to the same name space (security domain) as MyApp - * whereas Main2 does not; Main2 belongs - * to the same name space as javassist.tools.reflect.Loader. - * For more details, - * see the notes in the manual page of javassist.Loader. - * - *

The class Main2 is equivalent to this class: - * - * 

- * public class Main3 {
- *   public static void main(String[] args) throws Throwable {
- *     Reflection reflection = new Reflection();
- *     javassist.Loader cl
- *         = new javassist.Loader(ClassPool.getDefault(reflection));
- *     reflection.makeReflective("Person", "MyMetaobject",
- *                               "javassist.tools.reflect.ClassMetaobject");
- *     cl.run("MyApp", args);
- *   }
- * }
- *
- * - *

Note: - * - *

javassist.tools.reflect.Loader does not make a class reflective - * if that class is in a java.* or - * javax.* pacakge because of the specifications - * on the class loading algorithm of Java. The JVM does not allow to - * load such a system class with a user class loader. - * - *

To avoid this limitation, those classes should be statically - * modified with javassist.tools.reflect.Compiler and the original - * class files should be replaced. - * - * @see javassist.tools.reflect.Reflection - * @see javassist.tools.reflect.Compiler - * @see javassist.Loader - */ -public class Loader extends com.wenshuo.agent.javassist.Loader { - protected Reflection reflection; - - /** - * Loads a class with an instance of Loader - * and calls main() in that class. - * - * @param args command line parameters. - *
  args[0] is the class name to be loaded. - *
  args[1..n] are parameters passed - * to the target main(). - */ - public static void main(String[] args) throws Throwable { - Loader cl = new Loader(); - cl.run(args); - } - - /** - * Constructs a new class loader. - */ - public Loader() throws CannotCompileException, NotFoundException { - super(); - delegateLoadingOf("javassist.tools.reflect.Loader"); - - reflection = new Reflection(); - ClassPool pool = ClassPool.getDefault(); - addTranslator(pool, reflection); - } - - /** - * Produces a reflective class. - * If the super class is also made reflective, it must be done - * before the sub class. - * - * @param clazz the reflective class. - * @param metaobject the class of metaobjects. - * It must be a subclass of - * Metaobject. - * @param metaclass the class of the class metaobject. - * It must be a subclass of - * ClassMetaobject. - * @return false if the class is already reflective. - * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.ClassMetaobject - */ - public boolean makeReflective(String clazz, - String metaobject, String metaclass) - throws CannotCompileException, NotFoundException - { - return reflection.makeReflective(clazz, metaobject, metaclass); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java b/src/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java deleted file mode 100644 index d8c1f4a..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -/** - * An interface to access a metaobject and a class metaobject. - * This interface is implicitly implemented by the reflective - * class. - */ -public interface Metalevel { - /** - * Obtains the class metaobject associated with this object. - */ - ClassMetaobject _getClass(); - - /** - * Obtains the metaobject associated with this object. - */ - Metaobject _getMetaobject(); - - /** - * Changes the metaobject associated with this object. - */ - void _setMetaobject(Metaobject m); -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java b/src/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java deleted file mode 100644 index f96444e..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java +++ /dev/null @@ -1,239 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import java.lang.reflect.Method; -import java.io.Serializable; -import java.io.IOException; -import java.io.ObjectInputStream; -import java.io.ObjectOutputStream; - -/** - * A runtime metaobject. - * - *

A Metaobject is created for - * every object at the base level. A different reflective object is - * associated with a different metaobject. - * - *

The metaobject intercepts method calls - * on the reflective object at the base-level. To change the behavior - * of the method calls, a subclass of Metaobject - * should be defined. - * - *

To obtain a metaobject, calls _getMetaobject() - * on a reflective object. For example, - * - * 

- * Metaobject m = ((Metalevel)reflectiveObject)._getMetaobject();
- *
- * - * @see javassist.tools.reflect.ClassMetaobject - * @see javassist.tools.reflect.Metalevel - */ -public class Metaobject implements Serializable { - protected ClassMetaobject classmetaobject; - protected Metalevel baseobject; - protected Method[] methods; - - /** - * Constructs a Metaobject. The metaobject is - * constructed before the constructor is called on the base-level - * object. - * - * @param self the object that this metaobject is associated with. - * @param args the parameters passed to the constructor of - * self. - */ - public Metaobject(Object self, Object[] args) { - baseobject = (Metalevel)self; - classmetaobject = baseobject._getClass(); - methods = classmetaobject.getReflectiveMethods(); - } - - /** - * Constructs a Metaobject without initialization. - * If calling this constructor, a subclass should be responsible - * for initialization. - */ - protected Metaobject() { - baseobject = null; - classmetaobject = null; - methods = null; - } - - private void writeObject(ObjectOutputStream out) throws IOException { - out.writeObject(baseobject); - } - - private void readObject(ObjectInputStream in) - throws IOException, ClassNotFoundException - { - baseobject = (Metalevel)in.readObject(); - classmetaobject = baseobject._getClass(); - methods = classmetaobject.getReflectiveMethods(); - } - - /** - * Obtains the class metaobject associated with this metaobject. - * - * @see javassist.tools.reflect.ClassMetaobject - */ - public final ClassMetaobject getClassMetaobject() { - return classmetaobject; - } - - /** - * Obtains the object controlled by this metaobject. - */ - public final Object getObject() { - return baseobject; - } - - /** - * Changes the object controlled by this metaobject. - * - * @param self the object - */ - public final void setObject(Object self) { - baseobject = (Metalevel)self; - classmetaobject = baseobject._getClass(); - methods = classmetaobject.getReflectiveMethods(); - - // call _setMetaobject() after the metaobject is settled. - baseobject._setMetaobject(this); - } - - /** - * Returns the name of the method specified - * by identifier. - */ - public final String getMethodName(int identifier) { - String mname = methods[identifier].getName(); - int j = ClassMetaobject.methodPrefixLen; - for (;;) { - char c = mname.charAt(j++); - if (c < '0' || '9' < c) - break; - } - - return mname.substring(j); - } - - /** - * Returns an array of Class objects representing the - * formal parameter types of the method specified - * by identifier. - */ - public final Class[] getParameterTypes(int identifier) { - return methods[identifier].getParameterTypes(); - } - - /** - * Returns a Class objects representing the - * return type of the method specified by identifier. - */ - public final Class getReturnType(int identifier) { - return methods[identifier].getReturnType(); - } - - /** - * Is invoked when public fields of the base-level - * class are read and the runtime system intercepts it. - * This method simply returns the value of the field. - * - *

Every subclass of this class should redefine this method. - */ - public Object trapFieldRead(String name) { - Class jc = getClassMetaobject().getJavaClass(); - try { - return jc.getField(name).get(getObject()); - } - catch (NoSuchFieldException e) { - throw new RuntimeException(e.toString()); - } - catch (IllegalAccessException e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Is invoked when public fields of the base-level - * class are modified and the runtime system intercepts it. - * This method simply sets the field to the given value. - * - *

Every subclass of this class should redefine this method. - */ - public void trapFieldWrite(String name, Object value) { - Class jc = getClassMetaobject().getJavaClass(); - try { - jc.getField(name).set(getObject(), value); - } - catch (NoSuchFieldException e) { - throw new RuntimeException(e.toString()); - } - catch (IllegalAccessException e) { - throw new RuntimeException(e.toString()); - } - } - - /** - * Is invoked when base-level method invocation is intercepted. - * This method simply executes the intercepted method invocation - * with the original parameters and returns the resulting value. - * - *

Every subclass of this class should redefine this method. - * - *

Note: this method is not invoked if the base-level method - * is invoked by a constructor in the super class. For example, - * - * 

-     * abstract class A {
-     *   abstract void initialize();
-     *   A() {
-     *       initialize();    // not intercepted
-     *   }
-     * }
-     *
-     * class B extends A {
-     *   void initialize() { System.out.println("initialize()"); }
-     *   B() {
-     *       super();
-     *       initialize();    // intercepted
-     *   }
-     * }
- * - *

if an instance of B is created, - * the invocation of initialize() in B is intercepted only once. - * The first invocation by the constructor in A is not intercepted. - * This is because the link between a base-level object and a - * metaobject is not created until the execution of a - * constructor of the super class finishes. - */ - public Object trapMethodcall(int identifier, Object[] args) - throws Throwable - { - try { - return methods[identifier].invoke(getObject(), args); - } - catch (java.lang.reflect.InvocationTargetException e) { - throw e.getTargetException(); - } - catch (java.lang.IllegalAccessException e) { - throw new CannotInvokeException(e); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Reflection.java b/src/com/wenshuo/agent/javassist/tools/reflect/Reflection.java deleted file mode 100644 index 4e2219f..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Reflection.java +++ /dev/null @@ -1,403 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -import java.util.Iterator; -import com.wenshuo.agent.javassist.*; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; -import com.wenshuo.agent.javassist.bytecode.ClassFile; -import com.wenshuo.agent.javassist.bytecode.BadBytecode; -import com.wenshuo.agent.javassist.bytecode.MethodInfo; - -/** - * The class implementing the behavioral reflection mechanism. - * - *

If a class is reflective, - * then all the method invocations on every - * instance of that class are intercepted by the runtime - * metaobject controlling that instance. The methods inherited from the - * super classes are also intercepted except final methods. To intercept - * a final method in a super class, that super class must be also reflective. - * - *

To do this, the original class file representing a reflective class: - * - * 

- * class Person {
- *   public int f(int i) { return i + 1; }
- *   public int value;
- * }
- *
- * - *

is modified so that it represents a class: - * - * 

- * class Person implements Metalevel {
- *   public int _original_f(int i) { return i + 1; }
- *   public int f(int i) { delegate to the metaobject }
- *
- *   public int value;
- *   public int _r_value() { read "value" }
- *   public void _w_value(int v) { write "value" }
- *
- *   public ClassMetaobject _getClass() { return a class metaobject }
- *   public Metaobject _getMetaobject() { return a metaobject }
- *   public void _setMetaobject(Metaobject m) { change a metaobject }
- * }
- *
- * - * @see javassist.tools.reflect.ClassMetaobject - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.Loader - * @see javassist.tools.reflect.Compiler - */ -public class Reflection implements Translator { - - static final String classobjectField = "_classobject"; - static final String classobjectAccessor = "_getClass"; - static final String metaobjectField = "_metaobject"; - static final String metaobjectGetter = "_getMetaobject"; - static final String metaobjectSetter = "_setMetaobject"; - static final String readPrefix = "_r_"; - static final String writePrefix = "_w_"; - - static final String metaobjectClassName = "javassist.tools.reflect.Metaobject"; - static final String classMetaobjectClassName - = "javassist.tools.reflect.ClassMetaobject"; - - protected CtMethod trapMethod, trapStaticMethod; - protected CtMethod trapRead, trapWrite; - protected CtClass[] readParam; - - protected ClassPool classPool; - protected CodeConverter converter; - - private boolean isExcluded(String name) { - return name.startsWith(ClassMetaobject.methodPrefix) - || name.equals(classobjectAccessor) - || name.equals(metaobjectSetter) - || name.equals(metaobjectGetter) - || name.startsWith(readPrefix) - || name.startsWith(writePrefix); - } - - /** - * Constructs a new Reflection object. - */ - public Reflection() { - classPool = null; - converter = new CodeConverter(); - } - - /** - * Initializes the object. - */ - public void start(ClassPool pool) throws NotFoundException { - classPool = pool; - final String msg - = "javassist.tools.reflect.Sample is not found or broken."; - try { - CtClass c = classPool.get("javassist.tools.reflect.Sample"); - rebuildClassFile(c.getClassFile()); - trapMethod = c.getDeclaredMethod("trap"); - trapStaticMethod = c.getDeclaredMethod("trapStatic"); - trapRead = c.getDeclaredMethod("trapRead"); - trapWrite = c.getDeclaredMethod("trapWrite"); - readParam - = new CtClass[] { classPool.get("java.lang.Object") }; - } - catch (NotFoundException e) { - throw new RuntimeException(msg); - } catch (BadBytecode e) { - throw new RuntimeException(msg); - } - } - - /** - * Inserts hooks for intercepting accesses to the fields declared - * in reflective classes. - */ - public void onLoad(ClassPool pool, String classname) - throws CannotCompileException, NotFoundException - { - CtClass clazz = pool.get(classname); - clazz.instrument(converter); - } - - /** - * Produces a reflective class. - * If the super class is also made reflective, it must be done - * before the sub class. - * - * @param classname the name of the reflective class - * @param metaobject the class name of metaobjects. - * @param metaclass the class name of the class metaobject. - * @return false if the class is already reflective. - * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.ClassMetaobject - */ - public boolean makeReflective(String classname, - String metaobject, String metaclass) - throws CannotCompileException, NotFoundException - { - return makeReflective(classPool.get(classname), - classPool.get(metaobject), - classPool.get(metaclass)); - } - - /** - * Produces a reflective class. - * If the super class is also made reflective, it must be done - * before the sub class. - * - * @param clazz the reflective class. - * @param metaobject the class of metaobjects. - * It must be a subclass of - * Metaobject. - * @param metaclass the class of the class metaobject. - * It must be a subclass of - * ClassMetaobject. - * @return false if the class is already reflective. - * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.ClassMetaobject - */ - public boolean makeReflective(Class clazz, - Class metaobject, Class metaclass) - throws CannotCompileException, NotFoundException - { - return makeReflective(clazz.getName(), metaobject.getName(), - metaclass.getName()); - } - - /** - * Produces a reflective class. It modifies the given - * CtClass object and makes it reflective. - * If the super class is also made reflective, it must be done - * before the sub class. - * - * @param clazz the reflective class. - * @param metaobject the class of metaobjects. - * It must be a subclass of - * Metaobject. - * @param metaclass the class of the class metaobject. - * It must be a subclass of - * ClassMetaobject. - * @return false if the class is already reflective. - * - * @see javassist.tools.reflect.Metaobject - * @see javassist.tools.reflect.ClassMetaobject - */ - public boolean makeReflective(CtClass clazz, - CtClass metaobject, CtClass metaclass) - throws CannotCompileException, CannotReflectException, - NotFoundException - { - if (clazz.isInterface()) - throw new CannotReflectException( - "Cannot reflect an interface: " + clazz.getName()); - - if (clazz.subclassOf(classPool.get(classMetaobjectClassName))) - throw new CannotReflectException( - "Cannot reflect a subclass of ClassMetaobject: " - + clazz.getName()); - - if (clazz.subclassOf(classPool.get(metaobjectClassName))) - throw new CannotReflectException( - "Cannot reflect a subclass of Metaobject: " - + clazz.getName()); - - registerReflectiveClass(clazz); - return modifyClassfile(clazz, metaobject, metaclass); - } - - /** - * Registers a reflective class. The field accesses to the instances - * of this class are instrumented. - */ - private void registerReflectiveClass(CtClass clazz) { - CtField[] fs = clazz.getDeclaredFields(); - for (int i = 0; i < fs.length; ++i) { - CtField f = fs[i]; - int mod = f.getModifiers(); - if ((mod & Modifier.PUBLIC) != 0 && (mod & Modifier.FINAL) == 0) { - String name = f.getName(); - converter.replaceFieldRead(f, clazz, readPrefix + name); - converter.replaceFieldWrite(f, clazz, writePrefix + name); - } - } - } - - private boolean modifyClassfile(CtClass clazz, CtClass metaobject, - CtClass metaclass) - throws CannotCompileException, NotFoundException - { - if (clazz.getAttribute("Reflective") != null) - return false; // this is already reflective. - else - clazz.setAttribute("Reflective", new byte[0]); - - CtClass mlevel = classPool.get("javassist.tools.reflect.Metalevel"); - boolean addMeta = !clazz.subtypeOf(mlevel); - if (addMeta) - clazz.addInterface(mlevel); - - processMethods(clazz, addMeta); - processFields(clazz); - - CtField f; - if (addMeta) { - f = new CtField(classPool.get("javassist.tools.reflect.Metaobject"), - metaobjectField, clazz); - f.setModifiers(Modifier.PROTECTED); - clazz.addField(f, CtField.Initializer.byNewWithParams(metaobject)); - - clazz.addMethod(CtNewMethod.getter(metaobjectGetter, f)); - clazz.addMethod(CtNewMethod.setter(metaobjectSetter, f)); - } - - f = new CtField(classPool.get("javassist.tools.reflect.ClassMetaobject"), - classobjectField, clazz); - f.setModifiers(Modifier.PRIVATE | Modifier.STATIC); - clazz.addField(f, CtField.Initializer.byNew(metaclass, - new String[] { clazz.getName() })); - - clazz.addMethod(CtNewMethod.getter(classobjectAccessor, f)); - return true; - } - - private void processMethods(CtClass clazz, boolean dontSearch) - throws CannotCompileException, NotFoundException - { - CtMethod[] ms = clazz.getMethods(); - for (int i = 0; i < ms.length; ++i) { - CtMethod m = ms[i]; - int mod = m.getModifiers(); - if (Modifier.isPublic(mod) && !Modifier.isAbstract(mod)) - processMethods0(mod, clazz, m, i, dontSearch); - } - } - - private void processMethods0(int mod, CtClass clazz, - CtMethod m, int identifier, boolean dontSearch) - throws CannotCompileException, NotFoundException - { - CtMethod body; - String name = m.getName(); - - if (isExcluded(name)) // internally-used method inherited - return; // from a reflective class. - - CtMethod m2; - if (m.getDeclaringClass() == clazz) { - if (Modifier.isNative(mod)) - return; - - m2 = m; - if (Modifier.isFinal(mod)) { - mod &= ~Modifier.FINAL; - m2.setModifiers(mod); - } - } - else { - if (Modifier.isFinal(mod)) - return; - - mod &= ~Modifier.NATIVE; - m2 = CtNewMethod.delegator(findOriginal(m, dontSearch), clazz); - m2.setModifiers(mod); - clazz.addMethod(m2); - } - - m2.setName(ClassMetaobject.methodPrefix + identifier - + "_" + name); - - if (Modifier.isStatic(mod)) - body = trapStaticMethod; - else - body = trapMethod; - - CtMethod wmethod - = CtNewMethod.wrapped(m.getReturnType(), name, - m.getParameterTypes(), m.getExceptionTypes(), - body, ConstParameter.integer(identifier), - clazz); - wmethod.setModifiers(mod); - clazz.addMethod(wmethod); - } - - private CtMethod findOriginal(CtMethod m, boolean dontSearch) - throws NotFoundException - { - if (dontSearch) - return m; - - String name = m.getName(); - CtMethod[] ms = m.getDeclaringClass().getDeclaredMethods(); - for (int i = 0; i < ms.length; ++i) { - String orgName = ms[i].getName(); - if (orgName.endsWith(name) - && orgName.startsWith(ClassMetaobject.methodPrefix) - && ms[i].getSignature().equals(m.getSignature())) - return ms[i]; - } - - return m; - } - - private void processFields(CtClass clazz) - throws CannotCompileException, NotFoundException - { - CtField[] fs = clazz.getDeclaredFields(); - for (int i = 0; i < fs.length; ++i) { - CtField f = fs[i]; - int mod = f.getModifiers(); - if ((mod & Modifier.PUBLIC) != 0 && (mod & Modifier.FINAL) == 0) { - mod |= Modifier.STATIC; - String name = f.getName(); - CtClass ftype = f.getType(); - CtMethod wmethod - = CtNewMethod.wrapped(ftype, readPrefix + name, - readParam, null, trapRead, - ConstParameter.string(name), - clazz); - wmethod.setModifiers(mod); - clazz.addMethod(wmethod); - CtClass[] writeParam = new CtClass[2]; - writeParam[0] = classPool.get("java.lang.Object"); - writeParam[1] = ftype; - wmethod = CtNewMethod.wrapped(CtClass.voidType, - writePrefix + name, - writeParam, null, trapWrite, - ConstParameter.string(name), clazz); - wmethod.setModifiers(mod); - clazz.addMethod(wmethod); - } - } - } - - public void rebuildClassFile(ClassFile cf) throws BadBytecode { - if (ClassFile.MAJOR_VERSION < ClassFile.JAVA_6) - return; - - Iterator methods = cf.getMethods().iterator(); - while (methods.hasNext()) { - MethodInfo mi = (MethodInfo)methods.next(); - mi.rebuildStackMap(classPool); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/Sample.java b/src/com/wenshuo/agent/javassist/tools/reflect/Sample.java deleted file mode 100644 index 9622be5..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/Sample.java +++ /dev/null @@ -1,57 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.reflect; - -/** - * A template used for defining a reflective class. - */ -public class Sample { - private Metaobject _metaobject; - private static ClassMetaobject _classobject; - - public Object trap(Object[] args, int identifier) throws Throwable { - Metaobject mobj; - mobj = _metaobject; - if (mobj == null) - return ClassMetaobject.invoke(this, identifier, args); - else - return mobj.trapMethodcall(identifier, args); - } - - public static Object trapStatic(Object[] args, int identifier) - throws Throwable - { - return _classobject.trapMethodcall(identifier, args); - } - - public static Object trapRead(Object[] args, String name) { - if (args[0] == null) - return _classobject.trapFieldRead(name); - else - return ((Metalevel)args[0])._getMetaobject().trapFieldRead(name); - } - - public static Object trapWrite(Object[] args, String name) { - Metalevel base = (Metalevel)args[0]; - if (base == null) - _classobject.trapFieldWrite(name, args[1]); - else - base._getMetaobject().trapFieldWrite(name, args[1]); - - return null; - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/reflect/package.html b/src/com/wenshuo/agent/javassist/tools/reflect/package.html deleted file mode 100644 index 10a4196..0000000 --- a/src/com/wenshuo/agent/javassist/tools/reflect/package.html +++ /dev/null @@ -1,35 +0,0 @@ - - -Runtime Behavioral Reflection. - -

(also recently known as interceptors or AOP?) - -

This package enables a metaobject to trap method calls and field -accesses on a regular Java object. It provides a class -Reflection, which is a main module for implementing -runtime behavioral reflection. -It also provides -a class Loader and Compiler -as utilities for dynamically or statically -translating a regular class into a reflective class. - -

An instance of the reflective class is associated with -a runtime metaobject and a runtime class metaobject, which control -the behavior of that instance. -The runtime -metaobject is created for every (base-level) instance but the -runtime class metaobject is created for every (base-level) class. -Metaobject is the root class of the runtime -metaobject and ClassMetaobject is the root class -of the runtime class metaobject. - -

This package is provided as a sample implementation of the -reflection mechanism with Javassist. All the programs in this package -uses only the regular Javassist API; they never call any hidden -methods. - -

The most significant class in this package is Reflection. -See the description of this class first. - - - diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java b/src/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java deleted file mode 100644 index 4ffcc7a..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -import java.io.*; - -import com.wenshuo.agent.javassist.tools.web.*; -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.ClassPool; -import java.lang.reflect.Method; -import java.util.Hashtable; -import java.util.Vector; - -/** - * An AppletServer object is a web server that an ObjectImporter - * communicates with. It makes the objects specified by - * exportObject() remotely accessible from applets. - * If the classes of the exported objects are requested by the client-side - * JVM, this web server sends proxy classes for the requested classes. - * - * @see javassist.tools.rmi.ObjectImporter - */ -public class AppletServer extends Webserver { - private StubGenerator stubGen; - private Hashtable exportedNames; - private Vector exportedObjects; - - private static final byte[] okHeader - = "HTTP/1.0 200 OK\r\n\r\n".getBytes(); - - /** - * Constructs a web server. - * - * @param port port number - */ - public AppletServer(String port) - throws IOException, NotFoundException, CannotCompileException - { - this(Integer.parseInt(port)); - } - - /** - * Constructs a web server. - * - * @param port port number - */ - public AppletServer(int port) - throws IOException, NotFoundException, CannotCompileException - { - this(ClassPool.getDefault(), new StubGenerator(), port); - } - - /** - * Constructs a web server. - * - * @param port port number - * @param src the source of classs files. - */ - public AppletServer(int port, ClassPool src) - throws IOException, NotFoundException, CannotCompileException - { - this(new ClassPool(src), new StubGenerator(), port); - } - - private AppletServer(ClassPool loader, StubGenerator gen, int port) - throws IOException, NotFoundException, CannotCompileException - { - super(port); - exportedNames = new Hashtable(); - exportedObjects = new Vector(); - stubGen = gen; - addTranslator(loader, gen); - } - - /** - * Begins the HTTP service. - */ - public void run() { - super.run(); - } - - /** - * Exports an object. - * This method produces the bytecode of the proxy class used - * to access the exported object. A remote applet can load - * the proxy class and call a method on the exported object. - * - * @param name the name used for looking the object up. - * @param obj the exported object. - * @return the object identifier - * - * @see javassist.tools.rmi.ObjectImporter#lookupObject(String) - */ - public synchronized int exportObject(String name, Object obj) - throws CannotCompileException - { - Class clazz = obj.getClass(); - ExportedObject eo = new ExportedObject(); - eo.object = obj; - eo.methods = clazz.getMethods(); - exportedObjects.addElement(eo); - eo.identifier = exportedObjects.size() - 1; - if (name != null) - exportedNames.put(name, eo); - - try { - stubGen.makeProxyClass(clazz); - } - catch (NotFoundException e) { - throw new CannotCompileException(e); - } - - return eo.identifier; - } - - /** - * Processes a request from a web browser (an ObjectImporter). - */ - public void doReply(InputStream in, OutputStream out, String cmd) - throws IOException, BadHttpRequest - { - if (cmd.startsWith("POST /rmi ")) - processRMI(in, out); - else if (cmd.startsWith("POST /lookup ")) - lookupName(cmd, in, out); - else - super.doReply(in, out, cmd); - } - - private void processRMI(InputStream ins, OutputStream outs) - throws IOException - { - ObjectInputStream in = new ObjectInputStream(ins); - - int objectId = in.readInt(); - int methodId = in.readInt(); - Exception err = null; - Object rvalue = null; - try { - ExportedObject eo - = (ExportedObject)exportedObjects.elementAt(objectId); - Object[] args = readParameters(in); - rvalue = convertRvalue(eo.methods[methodId].invoke(eo.object, - args)); - } - catch(Exception e) { - err = e; - logging2(e.toString()); - } - - outs.write(okHeader); - ObjectOutputStream out = new ObjectOutputStream(outs); - if (err != null) { - out.writeBoolean(false); - out.writeUTF(err.toString()); - } - else - try { - out.writeBoolean(true); - out.writeObject(rvalue); - } - catch (NotSerializableException e) { - logging2(e.toString()); - } - catch (InvalidClassException e) { - logging2(e.toString()); - } - - out.flush(); - out.close(); - in.close(); - } - - private Object[] readParameters(ObjectInputStream in) - throws IOException, ClassNotFoundException - { - int n = in.readInt(); - Object[] args = new Object[n]; - for (int i = 0; i < n; ++i) { - Object a = in.readObject(); - if (a instanceof RemoteRef) { - RemoteRef ref = (RemoteRef)a; - ExportedObject eo - = (ExportedObject)exportedObjects.elementAt(ref.oid); - a = eo.object; - } - - args[i] = a; - } - - return args; - } - - private Object convertRvalue(Object rvalue) - throws CannotCompileException - { - if (rvalue == null) - return null; // the return type is void. - - String classname = rvalue.getClass().getName(); - if (stubGen.isProxyClass(classname)) - return new RemoteRef(exportObject(null, rvalue), classname); - else - return rvalue; - } - - private void lookupName(String cmd, InputStream ins, OutputStream outs) - throws IOException - { - ObjectInputStream in = new ObjectInputStream(ins); - String name = DataInputStream.readUTF(in); - ExportedObject found = (ExportedObject)exportedNames.get(name); - outs.write(okHeader); - ObjectOutputStream out = new ObjectOutputStream(outs); - if (found == null) { - logging2(name + "not found."); - out.writeInt(-1); // error code - out.writeUTF("error"); - } - else { - logging2(name); - out.writeInt(found.identifier); - out.writeUTF(found.object.getClass().getName()); - } - - out.flush(); - out.close(); - in.close(); - } -} - -class ExportedObject { - public int identifier; - public Object object; - public Method[] methods; -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java b/src/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java deleted file mode 100644 index 776160e..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -import java.io.*; -import java.net.*; -import java.applet.Applet; -import java.lang.reflect.*; - -/** - * The object importer enables applets to call a method on a remote - * object running on the Webserver (the main class of this - * package). - * - *

To access the remote - * object, the applet first calls lookupObject() and - * obtains a proxy object, which is a reference to that object. - * The class name of the proxy object is identical to that of - * the remote object. - * The proxy object provides the same set of methods as the remote object. - * If one of the methods is invoked on the proxy object, - * the invocation is delegated to the remote object. - * From the viewpoint of the applet, therefore, the two objects are - * identical. The applet can access the object on the server - * with the regular Java syntax without concern about the actual - * location. - * - *

The methods remotely called by the applet must be public. - * This is true even if the applet's class and the remote object's classs - * belong to the same package. - * - *

If class X is a class of remote objects, a subclass of X must be - * also a class of remote objects. On the other hand, this restriction - * is not applied to the superclass of X. The class X does not have to - * contain a constructor taking no arguments. - * - *

The parameters to a remote method is passed in the call-by-value - * manner. Thus all the parameter classes must implement - * java.io.Serializable. However, if the parameter is the - * proxy object, the reference to the remote object instead of a copy of - * the object is passed to the method. - * - *

Because of the limitations of the current implementation, - *

    - *
  • The parameter objects cannot contain the proxy - * object as a field value. - *
  • If class C is of the remote object, then - * the applet cannot instantiate C locally or remotely. - *
- * - *

All the exceptions thrown by the remote object are converted - * into RemoteException. Since this exception is a subclass - * of RuntimeException, the caller method does not need - * to catch the exception. However, good programs should catch - * the RuntimeException. - * - * @see javassist.tools.rmi.AppletServer - * @see javassist.tools.rmi.RemoteException - * @see javassist.tools.web.Viewer - */ -public class ObjectImporter implements java.io.Serializable { - private final byte[] endofline = { 0x0d, 0x0a }; - private String servername, orgServername; - private int port, orgPort; - - protected byte[] lookupCommand = "POST /lookup HTTP/1.0".getBytes(); - protected byte[] rmiCommand = "POST /rmi HTTP/1.0".getBytes(); - - /** - * Constructs an object importer. - * - *

Remote objects are imported from the web server that the given - * applet has been loaded from. - * - * @param applet the applet loaded from the Webserver. - */ - public ObjectImporter(Applet applet) { - URL codebase = applet.getCodeBase(); - orgServername = servername = codebase.getHost(); - orgPort = port = codebase.getPort(); - } - - /** - * Constructs an object importer. - * - *

If you run a program with javassist.tools.web.Viewer, - * you can construct an object importer as follows: - * - * 

-     * Viewer v = (Viewer)this.getClass().getClassLoader();
-     * ObjectImporter oi = new ObjectImporter(v.getServer(), v.getPort());
-     *
- * - * @see javassist.tools.web.Viewer - */ - public ObjectImporter(String servername, int port) { - this.orgServername = this.servername = servername; - this.orgPort = this.port = port; - } - - /** - * Finds the object exported by a server with the specified name. - * If the object is not found, this method returns null. - * - * @param name the name of the exported object. - * @return the proxy object or null. - */ - public Object getObject(String name) { - try { - return lookupObject(name); - } - catch (ObjectNotFoundException e) { - return null; - } - } - - /** - * Sets an http proxy server. After this method is called, the object - * importer connects a server through the http proxy server. - */ - public void setHttpProxy(String host, int port) { - String proxyHeader = "POST http://" + orgServername + ":" + orgPort; - String cmd = proxyHeader + "/lookup HTTP/1.0"; - lookupCommand = cmd.getBytes(); - cmd = proxyHeader + "/rmi HTTP/1.0"; - rmiCommand = cmd.getBytes(); - this.servername = host; - this.port = port; - } - - /** - * Finds the object exported by the server with the specified name. - * It sends a POST request to the server (via an http proxy server - * if needed). - * - * @param name the name of the exported object. - * @return the proxy object. - */ - public Object lookupObject(String name) throws ObjectNotFoundException - { - try { - Socket sock = new Socket(servername, port); - OutputStream out = sock.getOutputStream(); - out.write(lookupCommand); - out.write(endofline); - out.write(endofline); - - ObjectOutputStream dout = new ObjectOutputStream(out); - dout.writeUTF(name); - dout.flush(); - - InputStream in = new BufferedInputStream(sock.getInputStream()); - skipHeader(in); - ObjectInputStream din = new ObjectInputStream(in); - int n = din.readInt(); - String classname = din.readUTF(); - din.close(); - dout.close(); - sock.close(); - - if (n >= 0) - return createProxy(n, classname); - } - catch (Exception e) { - e.printStackTrace(); - throw new ObjectNotFoundException(name, e); - } - - throw new ObjectNotFoundException(name); - } - - private static final Class[] proxyConstructorParamTypes - = new Class[] { ObjectImporter.class, int.class }; - - private Object createProxy(int oid, String classname) throws Exception { - Class c = Class.forName(classname); - Constructor cons = c.getConstructor(proxyConstructorParamTypes); - return cons.newInstance(new Object[] { this, new Integer(oid) }); - } - - /** - * Calls a method on a remote object. - * It sends a POST request to the server (via an http proxy server - * if needed). - * - *

This method is called by only proxy objects. - */ - public Object call(int objectid, int methodid, Object[] args) - throws RemoteException - { - boolean result; - Object rvalue; - String errmsg; - - try { - /* This method establishes a raw tcp connection for sending - * a POST message. Thus the object cannot communicate a - * remote object beyond a fire wall. To avoid this problem, - * the connection should be established with a mechanism - * collaborating a proxy server. Unfortunately, java.lang.URL - * does not seem to provide such a mechanism. - * - * You might think that using HttpURLConnection is a better - * way than constructing a raw tcp connection. Unfortunately, - * URL.openConnection() does not return an HttpURLConnection - * object in Netscape's JVM. It returns a - * netscape.net.URLConnection object. - * - * lookupObject() has the same problem. - */ - Socket sock = new Socket(servername, port); - OutputStream out = new BufferedOutputStream( - sock.getOutputStream()); - out.write(rmiCommand); - out.write(endofline); - out.write(endofline); - - ObjectOutputStream dout = new ObjectOutputStream(out); - dout.writeInt(objectid); - dout.writeInt(methodid); - writeParameters(dout, args); - dout.flush(); - - InputStream ins = new BufferedInputStream(sock.getInputStream()); - skipHeader(ins); - ObjectInputStream din = new ObjectInputStream(ins); - result = din.readBoolean(); - rvalue = null; - errmsg = null; - if (result) - rvalue = din.readObject(); - else - errmsg = din.readUTF(); - - din.close(); - dout.close(); - sock.close(); - - if (rvalue instanceof RemoteRef) { - RemoteRef ref = (RemoteRef)rvalue; - rvalue = createProxy(ref.oid, ref.classname); - } - } - catch (ClassNotFoundException e) { - throw new RemoteException(e); - } - catch (IOException e) { - throw new RemoteException(e); - } - catch (Exception e) { - throw new RemoteException(e); - } - - if (result) - return rvalue; - else - throw new RemoteException(errmsg); - } - - private void skipHeader(InputStream in) throws IOException { - int len; - do { - int c; - len = 0; - while ((c = in.read()) >= 0 && c != 0x0d) - ++len; - - in.read(); /* skip 0x0a (LF) */ - } while (len > 0); - } - - private void writeParameters(ObjectOutputStream dout, Object[] params) - throws IOException - { - int n = params.length; - dout.writeInt(n); - for (int i = 0; i < n; ++i) - if (params[i] instanceof Proxy) { - Proxy p = (Proxy)params[i]; - dout.writeObject(new RemoteRef(p._getObjectId())); - } - else - dout.writeObject(params[i]); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java b/src/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java deleted file mode 100644 index cc4f801..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -public class ObjectNotFoundException extends Exception { - public ObjectNotFoundException(String name) { - super(name + " is not exported"); - } - - public ObjectNotFoundException(String name, Exception e) { - super(name + " because of " + e.toString()); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/Proxy.java b/src/com/wenshuo/agent/javassist/tools/rmi/Proxy.java deleted file mode 100644 index 9be28be..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/Proxy.java +++ /dev/null @@ -1,26 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -/** - * An interface implemented by proxy classes. - * - * @see javassist.tools.rmi.StubGenerator - */ -public interface Proxy { - int _getObjectId(); -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java b/src/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java deleted file mode 100644 index 9d6a3c7..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -/** - * RemoteException represents any exception thrown - * during remote method invocation. - */ -public class RemoteException extends RuntimeException { - public RemoteException(String msg) { - super(msg); - } - - public RemoteException(Exception e) { - super("by " + e.toString()); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java b/src/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java deleted file mode 100644 index a35a417..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -/** - * Remote reference. This class is internally used for sending a remote - * reference through a network stream. - */ -public class RemoteRef implements java.io.Serializable { - public int oid; - public String classname; - - public RemoteRef(int i) { - oid = i; - classname = null; - } - - public RemoteRef(int i, String name) { - oid = i; - classname = name; - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/Sample.java b/src/com/wenshuo/agent/javassist/tools/rmi/Sample.java deleted file mode 100644 index 409e959..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/Sample.java +++ /dev/null @@ -1,37 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -/** - * A template used for defining a proxy class. - * The class file of this class is read by the StubGenerator - * class. - */ -public class Sample { - private ObjectImporter importer; - private int objectId; - - public Object forward(Object[] args, int identifier) { - return importer.call(objectId, identifier, args); - } - - public static Object forwardStatic(Object[] args, int identifier) - throws RemoteException - { - throw new RemoteException("cannot call a static method."); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java b/src/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java deleted file mode 100644 index 9eaf6bf..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java +++ /dev/null @@ -1,256 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.rmi; - -import com.wenshuo.agent.javassist.*; -import java.lang.reflect.Method; -import java.util.Hashtable; -import com.wenshuo.agent.javassist.CtMethod.ConstParameter; - -/** - * A stub-code generator. It is used for producing a proxy class. - * - *

The proxy class for class A is as follows: - * - * 

public class A implements Proxy, Serializable {
- *   private ObjectImporter importer;
- *   private int objectId;
- *   public int _getObjectId() { return objectId; }
- *   public A(ObjectImporter oi, int id) {
- *     importer = oi; objectId = id;
- *   }
- *
- *   ... the same methods that the original class A declares ...
- * }
- * - *

Instances of the proxy class is created by an - * ObjectImporter object. - */ -public class StubGenerator implements Translator { - private static final String fieldImporter = "importer"; - private static final String fieldObjectId = "objectId"; - private static final String accessorObjectId = "_getObjectId"; - private static final String sampleClass = "javassist.tools.rmi.Sample"; - - private ClassPool classPool; - private Hashtable proxyClasses; - private CtMethod forwardMethod; - private CtMethod forwardStaticMethod; - - private CtClass[] proxyConstructorParamTypes; - private CtClass[] interfacesForProxy; - private CtClass[] exceptionForProxy; - - /** - * Constructs a stub-code generator. - */ - public StubGenerator() { - proxyClasses = new Hashtable(); - } - - /** - * Initializes the object. - * This is a method declared in javassist.Translator. - * - * @see javassist.Translator#start(ClassPool) - */ - public void start(ClassPool pool) throws NotFoundException { - classPool = pool; - CtClass c = pool.get(sampleClass); - forwardMethod = c.getDeclaredMethod("forward"); - forwardStaticMethod = c.getDeclaredMethod("forwardStatic"); - - proxyConstructorParamTypes - = pool.get(new String[] { "javassist.tools.rmi.ObjectImporter", - "int" }); - interfacesForProxy - = pool.get(new String[] { "java.io.Serializable", - "javassist.tools.rmi.Proxy" }); - exceptionForProxy - = new CtClass[] { pool.get("javassist.tools.rmi.RemoteException") }; - } - - /** - * Does nothing. - * This is a method declared in javassist.Translator. - * @see javassist.Translator#onLoad(ClassPool,String) - */ - public void onLoad(ClassPool pool, String classname) {} - - /** - * Returns true if the specified class is a proxy class - * recorded by makeProxyClass(). - * - * @param name a fully-qualified class name - */ - public boolean isProxyClass(String name) { - return proxyClasses.get(name) != null; - } - - /** - * Makes a proxy class. The produced class is substituted - * for the original class. - * - * @param clazz the class referenced - * through the proxy class. - * @return false if the proxy class - * has been already produced. - */ - public synchronized boolean makeProxyClass(Class clazz) - throws CannotCompileException, NotFoundException - { - String classname = clazz.getName(); - if (proxyClasses.get(classname) != null) - return false; - else { - CtClass ctclazz = produceProxyClass(classPool.get(classname), - clazz); - proxyClasses.put(classname, ctclazz); - modifySuperclass(ctclazz); - return true; - } - } - - private CtClass produceProxyClass(CtClass orgclass, Class orgRtClass) - throws CannotCompileException, NotFoundException - { - int modify = orgclass.getModifiers(); - if (Modifier.isAbstract(modify) || Modifier.isNative(modify) - || !Modifier.isPublic(modify)) - throw new CannotCompileException(orgclass.getName() - + " must be public, non-native, and non-abstract."); - - CtClass proxy = classPool.makeClass(orgclass.getName(), - orgclass.getSuperclass()); - - proxy.setInterfaces(interfacesForProxy); - - CtField f - = new CtField(classPool.get("javassist.tools.rmi.ObjectImporter"), - fieldImporter, proxy); - f.setModifiers(Modifier.PRIVATE); - proxy.addField(f, CtField.Initializer.byParameter(0)); - - f = new CtField(CtClass.intType, fieldObjectId, proxy); - f.setModifiers(Modifier.PRIVATE); - proxy.addField(f, CtField.Initializer.byParameter(1)); - - proxy.addMethod(CtNewMethod.getter(accessorObjectId, f)); - - proxy.addConstructor(CtNewConstructor.defaultConstructor(proxy)); - CtConstructor cons - = CtNewConstructor.skeleton(proxyConstructorParamTypes, - null, proxy); - proxy.addConstructor(cons); - - try { - addMethods(proxy, orgRtClass.getMethods()); - return proxy; - } - catch (SecurityException e) { - throw new CannotCompileException(e); - } - } - - private CtClass toCtClass(Class rtclass) throws NotFoundException { - String name; - if (!rtclass.isArray()) - name = rtclass.getName(); - else { - StringBuffer sbuf = new StringBuffer(); - do { - sbuf.append("[]"); - rtclass = rtclass.getComponentType(); - } while(rtclass.isArray()); - sbuf.insert(0, rtclass.getName()); - name = sbuf.toString(); - } - - return classPool.get(name); - } - - private CtClass[] toCtClass(Class[] rtclasses) throws NotFoundException { - int n = rtclasses.length; - CtClass[] ctclasses = new CtClass[n]; - for (int i = 0; i < n; ++i) - ctclasses[i] = toCtClass(rtclasses[i]); - - return ctclasses; - } - - /* ms must not be an array of CtMethod. To invoke a method ms[i] - * on a server, a client must send i to the server. - */ - private void addMethods(CtClass proxy, Method[] ms) - throws CannotCompileException, NotFoundException - { - CtMethod wmethod; - for (int i = 0; i < ms.length; ++i) { - Method m = ms[i]; - int mod = m.getModifiers(); - if (m.getDeclaringClass() != Object.class - && !Modifier.isFinal(mod)) - if (Modifier.isPublic(mod)) { - CtMethod body; - if (Modifier.isStatic(mod)) - body = forwardStaticMethod; - else - body = forwardMethod; - - wmethod - = CtNewMethod.wrapped(toCtClass(m.getReturnType()), - m.getName(), - toCtClass(m.getParameterTypes()), - exceptionForProxy, - body, - ConstParameter.integer(i), - proxy); - wmethod.setModifiers(mod); - proxy.addMethod(wmethod); - } - else if (!Modifier.isProtected(mod) - && !Modifier.isPrivate(mod)) - // if package method - throw new CannotCompileException( - "the methods must be public, protected, or private."); - } - } - - /** - * Adds a default constructor to the super classes. - */ - private void modifySuperclass(CtClass orgclass) - throws CannotCompileException, NotFoundException - { - CtClass superclazz; - for (;; orgclass = superclazz) { - superclazz = orgclass.getSuperclass(); - if (superclazz == null) - break; - - try { - superclazz.getDeclaredConstructor(null); - break; // the constructor with no arguments is found. - } - catch (NotFoundException e) { - } - - superclazz.addConstructor( - CtNewConstructor.defaultConstructor(superclazz)); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/rmi/package.html b/src/com/wenshuo/agent/javassist/tools/rmi/package.html deleted file mode 100644 index 5432a94..0000000 --- a/src/com/wenshuo/agent/javassist/tools/rmi/package.html +++ /dev/null @@ -1,16 +0,0 @@ - - -Sample implementation of remote method invocation. - -

This package enables applets to access remote objects -running on the web server with regular Java syntax. -It is provided as a sample implementation with Javassist. -All the programs in this package uses only the regular -Javassist API; they never call any hidden methods. - -

The most significant class of this package is -ObjectImporter. -See the description of this class first. - - - diff --git a/src/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java b/src/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java deleted file mode 100644 index 93cf67c..0000000 --- a/src/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java +++ /dev/null @@ -1,35 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.web; - -/** - * Thrown when receiving an invalid HTTP request. - */ -public class BadHttpRequest extends Exception { - private Exception e; - - public BadHttpRequest() { e = null; } - - public BadHttpRequest(Exception _e) { e = _e; } - - public String toString() { - if (e == null) - return super.toString(); - else - return e.toString(); - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/web/Viewer.java b/src/com/wenshuo/agent/javassist/tools/web/Viewer.java deleted file mode 100644 index 52d5416..0000000 --- a/src/com/wenshuo/agent/javassist/tools/web/Viewer.java +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.web; - -import java.io.*; -import java.net.*; - -/** - * A sample applet viewer. - * - *

This is a sort of applet viewer that can run any program even if - * the main class is not a subclass of Applet. - * This viewwer first calls main() in the main class. - * - *

To run, you should type: - * - * 

% java javassist.tools.web.Viewer host port Main arg1, ...
- * - *

This command calls Main.main() with arg1,... - * All classes including Main are fetched from - * a server http://host:port. - * Only the class file for Viewer must exist - * on a local file system at the client side; even other - * javassist.* classes are not needed at the client side. - * Viewer uses only Java core API classes. - * - *

Note: since a Viewer object is a class loader, - * a program loaded by this object can call a method in Viewer. - * For example, you can write something like this: - * - * 

- * Viewer v = (Viewer)this.getClass().getClassLoader();
- * String port = v.getPort();
- *
- * - */ -public class Viewer extends ClassLoader { - private String server; - private int port; - - /** - * Starts a program. - */ - public static void main(String[] args) throws Throwable { - if (args.length >= 3) { - Viewer cl = new Viewer(args[0], Integer.parseInt(args[1])); - String[] args2 = new String[args.length - 3]; - System.arraycopy(args, 3, args2, 0, args.length - 3); - cl.run(args[2], args2); - } - else - System.err.println( - "Usage: java javassist.tools.web.Viewer class [args ...]"); - } - - /** - * Constructs a viewer. - * - * @param host server name - * @param p port number - */ - public Viewer(String host, int p) { - server = host; - port = p; - } - - /** - * Returns the server name. - */ - public String getServer() { return server; } - - /** - * Returns the port number. - */ - public int getPort() { return port; } - - /** - * Invokes main() in the class specified by classname. - * - * @param classname executed class - * @param args the arguments passed to main(). - */ - public void run(String classname, String[] args) - throws Throwable - { - Class c = loadClass(classname); - try { - c.getDeclaredMethod("main", new Class[] { String[].class }) - .invoke(null, new Object[] { args }); - } - catch (java.lang.reflect.InvocationTargetException e) { - throw e.getTargetException(); - } - } - - /** - * Requests the class loader to load a class. - */ - protected synchronized Class loadClass(String name, boolean resolve) - throws ClassNotFoundException - { - Class c = findLoadedClass(name); - if (c == null) - c = findClass(name); - - if (c == null) - throw new ClassNotFoundException(name); - - if (resolve) - resolveClass(c); - - return c; - } - - /** - * Finds the specified class. The implementation in this class - * fetches the class from the http server. If the class is - * either java.*, javax.*, or - * Viewer, then it is loaded by the parent class - * loader. - * - *

This method can be overridden by a subclass of - * Viewer. - */ - protected Class findClass(String name) throws ClassNotFoundException { - Class c = null; - if (name.startsWith("java.") || name.startsWith("javax.") - || name.equals("javassist.tools.web.Viewer")) - c = findSystemClass(name); - - if (c == null) - try { - byte[] b = fetchClass(name); - if (b != null) - c = defineClass(name, b, 0, b.length); - } - catch (Exception e) { - } - - return c; - } - - /** - * Fetches the class file of the specified class from the http - * server. - */ - protected byte[] fetchClass(String classname) throws Exception - { - byte[] b; - URL url = new URL("http", server, port, - "/" + classname.replace('.', '/') + ".class"); - URLConnection con = url.openConnection(); - con.connect(); - int size = con.getContentLength(); - InputStream s = con.getInputStream(); - if (size <= 0) - b = readStream(s); - else { - b = new byte[size]; - int len = 0; - do { - int n = s.read(b, len, size - len); - if (n < 0) { - s.close(); - throw new IOException("the stream was closed: " - + classname); - } - len += n; - } while (len < size); - } - - s.close(); - return b; - } - - private byte[] readStream(InputStream fin) throws IOException { - byte[] buf = new byte[4096]; - int size = 0; - int len = 0; - do { - size += len; - if (buf.length - size <= 0) { - byte[] newbuf = new byte[buf.length * 2]; - System.arraycopy(buf, 0, newbuf, 0, size); - buf = newbuf; - } - - len = fin.read(buf, size, buf.length - size); - } while (len >= 0); - - byte[] result = new byte[size]; - System.arraycopy(buf, 0, result, 0, size); - return result; - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/web/Webserver.java b/src/com/wenshuo/agent/javassist/tools/web/Webserver.java deleted file mode 100644 index 5511ef2..0000000 --- a/src/com/wenshuo/agent/javassist/tools/web/Webserver.java +++ /dev/null @@ -1,408 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.tools.web; - -import java.net.*; -import java.io.*; -import java.util.Date; -import com.wenshuo.agent.javassist.*; - -/** - * A web server for running sample programs. - * - *

This enables a Java program to instrument class files loaded by - * web browsers for applets. Since the (standard) security manager - * does not allow an applet to create and use a class loader, - * instrumenting class files must be done by this web server. - * - *

Note: although this class is included in the Javassist API, - * it is provided as a sample implementation of the web server using - * Javassist. Especially, there might be security flaws in this server. - * Please use this with YOUR OWN RISK. - */ -public class Webserver { - private ServerSocket socket; - private ClassPool classPool; - protected Translator translator; - - private final static byte[] endofline = { 0x0d, 0x0a }; - - private final static int typeHtml = 1; - private final static int typeClass = 2; - private final static int typeGif = 3; - private final static int typeJpeg = 4; - private final static int typeText = 5; - - /** - * If this field is not null, the class files taken from - * ClassPool are written out under the directory - * specified by this field. The directory name must not end - * with a directory separator. - */ - public String debugDir = null; - - /** - * The top directory of html (and .gif, .class, ...) files. - * It must end with the directory separator such as "/". - * (For portability, "/" should be used as the directory separator. - * Javassist automatically translates "/" into a platform-dependent - * character.) - * If this field is null, the top directory is the current one where - * the JVM is running. - * - *

If the given URL indicates a class file and the class file - * is not found under the directory specified by this variable, - * then Class.getResourceAsStream() is called - * for searching the Java class paths. - */ - public String htmlfileBase = null; - - /** - * Starts a web server. - * The port number is specified by the first argument. - */ - public static void main(String[] args) throws IOException { - if (args.length == 1) { - Webserver web = new Webserver(args[0]); - web.run(); - } - else - System.err.println( - "Usage: java javassist.tools.web.Webserver "); - } - - /** - * Constructs a web server. - * - * @param port port number - */ - public Webserver(String port) throws IOException { - this(Integer.parseInt(port)); - } - - /** - * Constructs a web server. - * - * @param port port number - */ - public Webserver(int port) throws IOException { - socket = new ServerSocket(port); - classPool = null; - translator = null; - } - - /** - * Requests the web server to use the specified - * ClassPool object for obtaining a class file. - */ - public void setClassPool(ClassPool loader) { - classPool = loader; - } - - /** - * Adds a translator, which is called whenever a client requests - * a class file. - * - * @param cp the ClassPool object for obtaining - * a class file. - * @param t a translator. - */ - public void addTranslator(ClassPool cp, Translator t) - throws NotFoundException, CannotCompileException - { - classPool = cp; - translator = t; - t.start(classPool); - } - - /** - * Closes the socket. - */ - public void end() throws IOException { - socket.close(); - } - - /** - * Prints a log message. - */ - public void logging(String msg) { - System.out.println(msg); - } - - /** - * Prints a log message. - */ - public void logging(String msg1, String msg2) { - System.out.print(msg1); - System.out.print(" "); - System.out.println(msg2); - } - - /** - * Prints a log message. - */ - public void logging(String msg1, String msg2, String msg3) { - System.out.print(msg1); - System.out.print(" "); - System.out.print(msg2); - System.out.print(" "); - System.out.println(msg3); - } - - /** - * Prints a log message with indentation. - */ - public void logging2(String msg) { - System.out.print(" "); - System.out.println(msg); - } - - /** - * Begins the HTTP service. - */ - public void run() { - System.err.println("ready to service..."); - for (;;) - try { - ServiceThread th = new ServiceThread(this, socket.accept()); - th.start(); - } - catch (IOException e) { - logging(e.toString()); - } - } - - final void process(Socket clnt) throws IOException { - InputStream in = new BufferedInputStream(clnt.getInputStream()); - String cmd = readLine(in); - logging(clnt.getInetAddress().getHostName(), - new Date().toString(), cmd); - while (skipLine(in) > 0){ - } - - OutputStream out = new BufferedOutputStream(clnt.getOutputStream()); - try { - doReply(in, out, cmd); - } - catch (BadHttpRequest e) { - replyError(out, e); - } - - out.flush(); - in.close(); - out.close(); - clnt.close(); - } - - private String readLine(InputStream in) throws IOException { - StringBuffer buf = new StringBuffer(); - int c; - while ((c = in.read()) >= 0 && c != 0x0d) - buf.append((char)c); - - in.read(); /* skip 0x0a (LF) */ - return buf.toString(); - } - - private int skipLine(InputStream in) throws IOException { - int c; - int len = 0; - while ((c = in.read()) >= 0 && c != 0x0d) - ++len; - - in.read(); /* skip 0x0a (LF) */ - return len; - } - - /** - * Proceses a HTTP request from a client. - * - * @param out the output stream to a client - * @param cmd the command received from a client - */ - public void doReply(InputStream in, OutputStream out, String cmd) - throws IOException, BadHttpRequest - { - int len; - int fileType; - String filename, urlName; - - if (cmd.startsWith("GET /")) - filename = urlName = cmd.substring(5, cmd.indexOf(' ', 5)); - else - throw new BadHttpRequest(); - - if (filename.endsWith(".class")) - fileType = typeClass; - else if (filename.endsWith(".html") || filename.endsWith(".htm")) - fileType = typeHtml; - else if (filename.endsWith(".gif")) - fileType = typeGif; - else if (filename.endsWith(".jpg")) - fileType = typeJpeg; - else - fileType = typeText; // or textUnknown - - len = filename.length(); - if (fileType == typeClass - && letUsersSendClassfile(out, filename, len)) - return; - - checkFilename(filename, len); - if (htmlfileBase != null) - filename = htmlfileBase + filename; - - if (File.separatorChar != '/') - filename = filename.replace('/', File.separatorChar); - - File file = new File(filename); - if (file.canRead()) { - sendHeader(out, file.length(), fileType); - FileInputStream fin = new FileInputStream(file); - byte[] filebuffer = new byte[4096]; - for (;;) { - len = fin.read(filebuffer); - if (len <= 0) - break; - else - out.write(filebuffer, 0, len); - } - - fin.close(); - return; - } - - // If the file is not found under the html-file directory, - // then Class.getResourceAsStream() is tried. - - if (fileType == typeClass) { - InputStream fin - = getClass().getResourceAsStream("/" + urlName); - if (fin != null) { - ByteArrayOutputStream barray = new ByteArrayOutputStream(); - byte[] filebuffer = new byte[4096]; - for (;;) { - len = fin.read(filebuffer); - if (len <= 0) - break; - else - barray.write(filebuffer, 0, len); - } - - byte[] classfile = barray.toByteArray(); - sendHeader(out, classfile.length, typeClass); - out.write(classfile); - fin.close(); - return; - } - } - - throw new BadHttpRequest(); - } - - private void checkFilename(String filename, int len) - throws BadHttpRequest - { - for (int i = 0; i < len; ++i) { - char c = filename.charAt(i); - if (!Character.isJavaIdentifierPart(c) && c != '.' && c != '/') - throw new BadHttpRequest(); - } - - if (filename.indexOf("..") >= 0) - throw new BadHttpRequest(); - } - - private boolean letUsersSendClassfile(OutputStream out, - String filename, int length) - throws IOException, BadHttpRequest - { - if (classPool == null) - return false; - - byte[] classfile; - String classname - = filename.substring(0, length - 6).replace('/', '.'); - try { - if (translator != null) - translator.onLoad(classPool, classname); - - CtClass c = classPool.get(classname); - classfile = c.toBytecode(); - if (debugDir != null) - c.writeFile(debugDir); - } - catch (Exception e) { - throw new BadHttpRequest(e); - } - - sendHeader(out, classfile.length, typeClass); - out.write(classfile); - return true; - } - - private void sendHeader(OutputStream out, long dataLength, int filetype) - throws IOException - { - out.write("HTTP/1.0 200 OK".getBytes()); - out.write(endofline); - out.write("Content-Length: ".getBytes()); - out.write(Long.toString(dataLength).getBytes()); - out.write(endofline); - if (filetype == typeClass) - out.write("Content-Type: application/octet-stream".getBytes()); - else if (filetype == typeHtml) - out.write("Content-Type: text/html".getBytes()); - else if (filetype == typeGif) - out.write("Content-Type: image/gif".getBytes()); - else if (filetype == typeJpeg) - out.write("Content-Type: image/jpg".getBytes()); - else if (filetype == typeText) - out.write("Content-Type: text/plain".getBytes()); - - out.write(endofline); - out.write(endofline); - } - - private void replyError(OutputStream out, BadHttpRequest e) - throws IOException - { - logging2("bad request: " + e.toString()); - out.write("HTTP/1.0 400 Bad Request".getBytes()); - out.write(endofline); - out.write(endofline); - out.write("

Bad Request

".getBytes()); - } -} - -class ServiceThread extends Thread { - Webserver web; - Socket sock; - - public ServiceThread(Webserver w, Socket s) { - web = w; - sock = s; - } - - public void run() { - try { - web.process(sock); - } - catch (IOException e) { - } - } -} diff --git a/src/com/wenshuo/agent/javassist/tools/web/package.html b/src/com/wenshuo/agent/javassist/tools/web/package.html deleted file mode 100644 index 0c7fb45..0000000 --- a/src/com/wenshuo/agent/javassist/tools/web/package.html +++ /dev/null @@ -1,7 +0,0 @@ - - -Simple web server for running sample code. - -

This package provides a simple web server for sample packages. - - diff --git a/src/com/wenshuo/agent/javassist/util/HotSwapper.java b/src/com/wenshuo/agent/javassist/util/HotSwapper.java deleted file mode 100644 index 45836bf..0000000 --- a/src/com/wenshuo/agent/javassist/util/HotSwapper.java +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util; - -import com.sun.jdi.*; -import com.sun.jdi.connect.*; -import com.sun.jdi.event.*; -import com.sun.jdi.request.*; -import java.io.*; -import java.util.*; - -class Trigger { - void doSwap() {} -} - -/** - * A utility class for dynamically reloading a class by - * the Java Platform Debugger Architecture (JPDA), or HotSwap. - * It works only with JDK 1.4 and later. - * - *

Note: The new definition of the reloaded class must declare - * the same set of methods and fields as the original definition. The - * schema change between the original and new definitions is not allowed - * by the JPDA. - * - *

To use this class, the JVM must be launched with the following - * command line options: - * - *

For Java 1.4,
- * 

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000
- *

For Java 5,
- * 

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000
- * - *

Note that 8000 is the port number used by HotSwapper. - * Any port number can be specified. Since HotSwapper does not - * launch another JVM for running a target application, this port number - * is used only for inter-thread communication. - * - *

Furthermore, JAVA_HOME/lib/tools.jar must be included - * in the class path. - * - *

Using HotSwapper is easy. See the following example: - * - * 

- * CtClass clazz = ...
- * byte[] classFile = clazz.toBytecode();
- * HotSwapper hs = new HostSwapper(8000);  // 8000 is a port number.
- * hs.reload("Test", classFile);
- *
- * - *

reload() - * first unload the Test class and load a new version of - * the Test class. - * classFile is a byte array containing the new contents of - * the class file for the Test class. The developers can - * repatedly call reload() on the same HotSwapper - * object so that they can reload a number of classes. - * - * @since 3.1 - */ -public class HotSwapper { - private VirtualMachine jvm; - private MethodEntryRequest request; - private Map newClassFiles; - - private Trigger trigger; - - private static final String HOST_NAME = "localhost"; - private static final String TRIGGER_NAME = Trigger.class.getName(); - - /** - * Connects to the JVM. - * - * @param port the port number used for the connection to the JVM. - */ - public HotSwapper(int port) - throws IOException, IllegalConnectorArgumentsException - { - this(Integer.toString(port)); - } - - /** - * Connects to the JVM. - * - * @param port the port number used for the connection to the JVM. - */ - public HotSwapper(String port) - throws IOException, IllegalConnectorArgumentsException - { - jvm = null; - request = null; - newClassFiles = null; - trigger = new Trigger(); - AttachingConnector connector - = (AttachingConnector)findConnector("com.sun.jdi.SocketAttach"); - - Map arguments = connector.defaultArguments(); - ((Connector.Argument)arguments.get("hostname")).setValue(HOST_NAME); - ((Connector.Argument)arguments.get("port")).setValue(port); - jvm = connector.attach(arguments); - EventRequestManager manager = jvm.eventRequestManager(); - request = methodEntryRequests(manager, TRIGGER_NAME); - } - - private Connector findConnector(String connector) throws IOException { - List connectors = Bootstrap.virtualMachineManager().allConnectors(); - Iterator iter = connectors.iterator(); - while (iter.hasNext()) { - Connector con = (Connector)iter.next(); - if (con.name().equals(connector)) { - return con; - } - } - - throw new IOException("Not found: " + connector); - } - - private static MethodEntryRequest methodEntryRequests( - EventRequestManager manager, - String classpattern) { - MethodEntryRequest mereq = manager.createMethodEntryRequest(); - mereq.addClassFilter(classpattern); - mereq.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD); - return mereq; - } - - /* Stops triggering a hotswapper when reload() is called. - */ - private void deleteEventRequest(EventRequestManager manager, - MethodEntryRequest request) { - manager.deleteEventRequest(request); - } - - /** - * Reloads a class. - * - * @param className the fully-qualified class name. - * @param classFile the contents of the class file. - */ - public void reload(String className, byte[] classFile) { - ReferenceType classtype = toRefType(className); - Map map = new HashMap(); - map.put(classtype, classFile); - reload2(map, className); - } - - /** - * Reloads a class. - * - * @param classFiles a map between fully-qualified class names - * and class files. The type of the class names - * is String and the type of the - * class files is byte[]. - */ - public void reload(Map classFiles) { - Set set = classFiles.entrySet(); - Iterator it = set.iterator(); - Map map = new HashMap(); - String className = null; - while (it.hasNext()) { - Map.Entry e = (Map.Entry)it.next(); - className = (String)e.getKey(); - map.put(toRefType(className), e.getValue()); - } - - if (className != null) - reload2(map, className + " etc."); - } - - private ReferenceType toRefType(String className) { - List list = jvm.classesByName(className); - if (list == null || list.isEmpty()) - throw new RuntimeException("no such class: " + className); - else - return (ReferenceType)list.get(0); - } - - private void reload2(Map map, String msg) { - synchronized (trigger) { - startDaemon(); - newClassFiles = map; - request.enable(); - trigger.doSwap(); - request.disable(); - Map ncf = newClassFiles; - if (ncf != null) { - newClassFiles = null; - throw new RuntimeException("failed to reload: " + msg); - } - } - } - - private void startDaemon() { - new Thread() { - private void errorMsg(Throwable e) { - System.err.print("Exception in thread \"HotSwap\" "); - e.printStackTrace(System.err); - } - - public void run() { - EventSet events = null; - try { - events = waitEvent(); - EventIterator iter = events.eventIterator(); - while (iter.hasNext()) { - Event event = iter.nextEvent(); - if (event instanceof MethodEntryEvent) { - hotswap(); - break; - } - } - } - catch (Throwable e) { - errorMsg(e); - } - try { - if (events != null) - events.resume(); - } - catch (Throwable e) { - errorMsg(e); - } - } - }.start(); - } - - EventSet waitEvent() throws InterruptedException { - EventQueue queue = jvm.eventQueue(); - return queue.remove(); - } - - void hotswap() { - Map map = newClassFiles; - jvm.redefineClasses(map); - newClassFiles = null; - } -} diff --git a/src/com/wenshuo/agent/javassist/util/package.html b/src/com/wenshuo/agent/javassist/util/package.html deleted file mode 100644 index 349d996..0000000 --- a/src/com/wenshuo/agent/javassist/util/package.html +++ /dev/null @@ -1,5 +0,0 @@ - - -Utility classes. - - diff --git a/src/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java b/src/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java deleted file mode 100644 index 02f961e..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java +++ /dev/null @@ -1,237 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.Method; -import java.io.BufferedOutputStream; -import java.io.ByteArrayOutputStream; -import java.io.DataOutputStream; -import java.io.File; -import java.io.FileOutputStream; -import java.io.IOException; -import java.security.ProtectionDomain; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.bytecode.ClassFile; - -/** - * A helper class for implementing ProxyFactory. - * The users of ProxyFactory do not have to see this class. - * - * @see ProxyFactory - */ -public class FactoryHelper { - private static java.lang.reflect.Method defineClass1, defineClass2; - - static { - try { - Class cl = Class.forName("java.lang.ClassLoader"); - defineClass1 = SecurityActions.getDeclaredMethod( - cl, - "defineClass", - new Class[] { String.class, byte[].class, - int.class, int.class }); - - defineClass2 = SecurityActions.getDeclaredMethod( - cl, - "defineClass", - new Class[] { String.class, byte[].class, - int.class, int.class, ProtectionDomain.class }); - } - catch (Exception e) { - throw new RuntimeException("cannot initialize"); - } - } - - /** - * Returns an index for accessing arrays in this class. - * - * @throws RuntimeException if a given type is not a primitive type. - */ - public static final int typeIndex(Class type) { - Class[] list = primitiveTypes; - int n = list.length; - for (int i = 0; i < n; i++) - if (list[i] == type) - return i; - - throw new RuntimeException("bad type:" + type.getName()); - } - - /** - * Class objects representing primitive types. - */ - public static final Class[] primitiveTypes = { - Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE, Integer.TYPE, - Long.TYPE, Float.TYPE, Double.TYPE, Void.TYPE - }; - - /** - * The fully-qualified names of wrapper classes for primitive types. - */ - public static final String[] wrapperTypes = { - "java.lang.Boolean", "java.lang.Byte", "java.lang.Character", - "java.lang.Short", "java.lang.Integer", "java.lang.Long", - "java.lang.Float", "java.lang.Double", "java.lang.Void" - }; - - /** - * The descriptors of the constructors of wrapper classes. - */ - public static final String[] wrapperDesc = { - "(Z)V", "(B)V", "(C)V", "(S)V", "(I)V", "(J)V", - "(F)V", "(D)V" - }; - - /** - * The names of methods for obtaining a primitive value - * from a wrapper object. For example, intValue() - * is such a method for obtaining an integer value from a - * java.lang.Integer object. - */ - public static final String[] unwarpMethods = { - "booleanValue", "byteValue", "charValue", "shortValue", - "intValue", "longValue", "floatValue", "doubleValue" - }; - - /** - * The descriptors of the unwrapping methods contained - * in unwrapMethods. - */ - public static final String[] unwrapDesc = { - "()Z", "()B", "()C", "()S", "()I", "()J", "()F", "()D" - }; - - /** - * The data size of primitive types. long - * and double are 2; the others are 1. - */ - public static final int[] dataSize = { - 1, 1, 1, 1, 1, 2, 1, 2 - }; - - /** - * Loads a class file by a given class loader. - * This method uses a default protection domain for the class - * but it may not work with a security manager or a sigend jar file. - * - * @see #toClass(ClassFile,ClassLoader,ProtectionDomain) - */ - public static Class toClass(ClassFile cf, ClassLoader loader) - throws CannotCompileException - { - return toClass(cf, loader, null); - } - - /** - * Loads a class file by a given class loader. - * - * @param domain if it is null, a default domain is used. - * @since 3.3 - */ - public static Class toClass(ClassFile cf, ClassLoader loader, ProtectionDomain domain) - throws CannotCompileException - { - try { - byte[] b = toBytecode(cf); - Method method; - Object[] args; - if (domain == null) { - method = defineClass1; - args = new Object[] { cf.getName(), b, new Integer(0), - new Integer(b.length) }; - } - else { - method = defineClass2; - args = new Object[] { cf.getName(), b, new Integer(0), - new Integer(b.length), domain }; - } - - return toClass2(method, loader, args); - } - catch (RuntimeException e) { - throw e; - } - catch (java.lang.reflect.InvocationTargetException e) { - throw new CannotCompileException(e.getTargetException()); - } - catch (Exception e) { - throw new CannotCompileException(e); - } - } - - private static synchronized Class toClass2(Method method, - ClassLoader loader, Object[] args) - throws Exception - { - SecurityActions.setAccessible(method, true); - Class clazz = (Class)method.invoke(loader, args); - SecurityActions.setAccessible(method, false); - return clazz; - } - - private static byte[] toBytecode(ClassFile cf) throws IOException { - ByteArrayOutputStream barray = new ByteArrayOutputStream(); - DataOutputStream out = new DataOutputStream(barray); - try { - cf.write(out); - } - finally { - out.close(); - } - - return barray.toByteArray(); - } - - /** - * Writes a class file. - */ - public static void writeFile(ClassFile cf, String directoryName) - throws CannotCompileException { - try { - writeFile0(cf, directoryName); - } - catch (IOException e) { - throw new CannotCompileException(e); - } - } - - private static void writeFile0(ClassFile cf, String directoryName) - throws CannotCompileException, IOException { - String classname = cf.getName(); - String filename = directoryName + File.separatorChar - + classname.replace('.', File.separatorChar) + ".class"; - int pos = filename.lastIndexOf(File.separatorChar); - if (pos > 0) { - String dir = filename.substring(0, pos); - if (!dir.equals(".")) - new File(dir).mkdirs(); - } - - DataOutputStream out = new DataOutputStream(new BufferedOutputStream( - new FileOutputStream(filename))); - try { - cf.write(out); - } - catch (IOException e) { - throw e; - } - finally { - out.close(); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java b/src/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java deleted file mode 100644 index 4ebe168..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.Method; - -/** - * Selector of the methods implemented by a handler. - * - * @see ProxyFactory#setFilter(MethodFilter) - */ -public interface MethodFilter { - /** - * Returns true if the given method is implemented by a handler. - */ - boolean isHandled(Method m); -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java b/src/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java deleted file mode 100644 index 546dc76..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.Method; - -/** - * The interface implemented by the invocation handler of a proxy - * instance. - * - * @see Proxy#setHandler(MethodHandler) - */ -public interface MethodHandler { - /** - * Is called when a method is invoked on a proxy instance associated - * with this handler. This method must process that method invocation. - * - * @param self the proxy instance. - * @param thisMethod the overridden method declared in the super - * class or interface. - * @param proceed the forwarder method for invoking the overridden - * method. It is null if the overridden method is - * abstract or declared in the interface. - * @param args an array of objects containing the values of - * the arguments passed in the method invocation - * on the proxy instance. If a parameter type is - * a primitive type, the type of the array element - * is a wrapper class. - * @return the resulting value of the method invocation. - * - * @throws Throwable if the method invocation fails. - */ - Object invoke(Object self, Method thisMethod, Method proceed, - Object[] args) throws Throwable; -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/Proxy.java b/src/com/wenshuo/agent/javassist/util/proxy/Proxy.java deleted file mode 100644 index 3907742..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/Proxy.java +++ /dev/null @@ -1,33 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -/** - * The interface implemented by proxy classes. - * This interface only provides a setter method. - * To obtain a handler, call {@link ProxyFactory#getHandler(Proxy)}. - * - * @see ProxyFactory - * @since 3.16 - */ -public interface Proxy { - /** - * Sets a handler. It can be used for changing handlers - * during runtime. - */ - void setHandler(MethodHandler mi); -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java b/src/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java deleted file mode 100644 index 270fc56..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java +++ /dev/null @@ -1,1446 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.Field; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.lang.reflect.Constructor; -import java.lang.reflect.Member; -import java.lang.reflect.Modifier; -import java.security.ProtectionDomain; -import java.util.*; -import java.lang.ref.WeakReference; - -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.NotFoundException; -import com.wenshuo.agent.javassist.bytecode.*; - -/* - * This class is implemented only with the lower-level API of Javassist. - * This design decision is for maximizing performance. - */ - -/** - * Factory of dynamic proxy classes. - * - *

This factory generates a class that extends the given super class and implements - * the given interfaces. The calls of the methods inherited from the super class are - * forwarded and then invoke() is called on the method handler - * associated with instances of the generated class. The calls of the methods from - * the interfaces are also forwarded to the method handler. - * - *

For example, if the following code is executed, - * - * 

- * ProxyFactory f = new ProxyFactory();
- * f.setSuperclass(Foo.class);
- * f.setFilter(new MethodFilter() {
- *     public boolean isHandled(Method m) {
- *         // ignore finalize()
- *         return !m.getName().equals("finalize");
- *     }
- * });
- * Class c = f.createClass();
- * MethodHandler mi = new MethodHandler() {
- *     public Object invoke(Object self, Method m, Method proceed,
- *                          Object[] args) throws Throwable {
- *         System.out.println("Name: " + m.getName());
- *         return proceed.invoke(self, args);  // execute the original method.
- *     }
- * };
- * Foo foo = (Foo)c.newInstance();
- * ((Proxy)foo).setHandler(mi);
- *
- * - *

Here, Method is java.lang.reflect.Method.

- * - *

Then, the following method call will be forwarded to MethodHandler - * mi and prints a message before executing the originally called method - * bar() in Foo. - * - * 

- * foo.bar();
- *
- * - *

The last three lines of the code shown above can be replaced with a call to - * the helper method create, which generates a proxy class, instantiates - * it, and sets the method handler of the instance: - * - * 

- *     :
- * Foo foo = (Foo)f.create(new Class[0], new Object[0], mi);
- *
- * - *

To change the method handler during runtime, - * execute the following code: - * - * 

- * MethodHandler mi = ... ;    // alternative handler
- * ((Proxy)foo).setHandler(mi);
- *
- * - *

If setHandler is never called for a proxy instance then it will - * employ the default handler which proceeds by invoking the original method. - * The behaviour of the default handler is identical to the following - * handler: - * - * 

- * class EmptyHandler implements MethodHandler {
- *     public Object invoke(Object self, Method m,
- *                          Method proceed, Object[] args) throws Exception {
- *         return proceed.invoke(self, args);
- *     }
- * }
- *
- * - *

A proxy factory caches and reuses proxy classes by default. It is possible to reset - * this default globally by setting static field {@link ProxyFactory#useCache} to false. - * Caching may also be configured for a specific factory by calling instance method - * {@link ProxyFactory#setUseCache(boolean)}. It is strongly recommended that new clients - * of class ProxyFactory enable caching. Failure to do so may lead to exhaustion of - * the heap memory area used to store classes. - * - *

Caching is automatically disabled for any given proxy factory if deprecated instance - * method {@link ProxyFactory#setHandler(MethodHandler)} is called. This method was - * used to specify a default handler which newly created proxy classes should install - * when they create their instances. It is only retained to provide backward compatibility - * with previous releases of javassist. Unfortunately,this legacy behaviour makes caching - * and reuse of proxy classes impossible. The current programming model expects javassist - * clients to set the handler of a proxy instance explicitly by calling method - * {@link Proxy#setHandler(MethodHandler)} as shown in the sample code above. New - * clients are strongly recommended to use this model rather than calling - * {@link ProxyFactory#setHandler(MethodHandler)}. - * - *

A proxy object generated by ProxyFactory is serializable - * if its super class or any of its interfaces implement java.io.Serializable. - * However, a serialized proxy object may not be compatible with future releases. - * The serialization support should be used for short-term storage or RMI. - * - *

For compatibility with older releases serialization of proxy objects is implemented by - * adding a writeReplace method to the proxy class. This allows a proxy to be serialized - * to a conventional {@link java.io.ObjectOutputStream} and deserialized from a corresponding - * {@link java.io.ObjectInputStream}. However this method suffers from several problems, the most - * notable one being that it fails to serialize state inherited from the proxy's superclass. - *

- * An alternative method of serializing proxy objects is available which fixes these problems. It - * requires inhibiting generation of the writeReplace method and instead using instances of - * {@link javassist.util.proxy.ProxyObjectOutputStream} and {@link javassist.util.proxy.ProxyObjectInputStream} - * (which are subclasses of {@link java.io.ObjectOutputStream} and {@link java.io.ObjectInputStream}) - * to serialize and deserialize, respectively, the proxy. These streams recognise javassist proxies and ensure - * that they are serialized and deserialized without the need for the proxy class to implement special methods - * such as writeReplace. Generation of the writeReplace method can be disabled globally by setting static field - * {@link ProxyFactory#useWriteReplace} to false. Alternatively, it may be - * configured per factory by calling instance method {@link ProxyFactory#setUseWriteReplace(boolean)}. - * - * @see MethodHandler - * @since 3.1 - * @author Muga Nishizawa - * @author Shigeru Chiba - * @author Andrew Dinn - */ -public class ProxyFactory { - private Class superClass; - private Class[] interfaces; - private MethodFilter methodFilter; - private MethodHandler handler; // retained for legacy usage - private List signatureMethods; - private boolean hasGetHandler; - private byte[] signature; - private String classname; - private String basename; - private String superName; - private Class thisClass; - /** - * per factory setting initialised from current setting for useCache but able to be reset before each create call - */ - private boolean factoryUseCache; - /** - * per factory setting initialised from current setting for useWriteReplace but able to be reset before each create call - */ - private boolean factoryWriteReplace; - - - /** - * If the value of this variable is not null, the class file of - * the generated proxy class is written under the directory specified - * by this variable. For example, if the value is - * ".", then the class file is written under the current - * directory. This method is for debugging. - * - *

The default value is null. - */ - public String writeDirectory; - - private static final Class OBJECT_TYPE = Object.class; - - private static final String HOLDER = "_methods_"; - private static final String HOLDER_TYPE = "[Ljava/lang/reflect/Method;"; - private static final String FILTER_SIGNATURE_FIELD = "_filter_signature"; - private static final String FILTER_SIGNATURE_TYPE = "[B"; - private static final String HANDLER = "handler"; - private static final String NULL_INTERCEPTOR_HOLDER = "javassist.util.proxy.RuntimeSupport"; - private static final String DEFAULT_INTERCEPTOR = "default_interceptor"; - private static final String HANDLER_TYPE - = 'L' + MethodHandler.class.getName().replace('.', '/') + ';'; - private static final String HANDLER_SETTER = "setHandler"; - private static final String HANDLER_SETTER_TYPE = "(" + HANDLER_TYPE + ")V"; - - private static final String HANDLER_GETTER = "getHandler"; - private static final String HANDLER_GETTER_TYPE = "()" + HANDLER_TYPE; - - private static final String SERIAL_VERSION_UID_FIELD = "serialVersionUID"; - private static final String SERIAL_VERSION_UID_TYPE = "J"; - private static final long SERIAL_VERSION_UID_VALUE = -1L; - - /** - * If true, a generated proxy class is cached and it will be reused - * when generating the proxy class with the same properties is requested. - * The default value is true. - * - * Note that this value merely specifies the initial setting employed by any newly created - * proxy factory. The factory setting may be overwritten by calling factory instance method - * {@link #setUseCache(boolean)} - * - * @since 3.4 - */ - public static volatile boolean useCache = true; - - /** - * If true, a generated proxy class will implement method writeReplace enabling - * serialization of its proxies to a conventional ObjectOutputStream. this (default) - * setting retains the old javassist behaviour which has the advantage that it - * retains compatibility with older releases and requires no extra work on the part - * of the client performing the serialization. However, it has the disadvantage that - * state inherited from the superclasses of the proxy is lost during serialization. - * if false then serialization/deserialization of the proxy instances will preserve - * all fields. However, serialization must be performed via a {@link ProxyObjectOutputStream} - * and deserialization must be via {@link ProxyObjectInputStream}. Any attempt to serialize - * proxies whose class was created with useWriteReplace set to false via a normal - * {@link java.io.ObjectOutputStream} will fail. - * - * Note that this value merely specifies the initial setting employed by any newly created - * proxy factory. The factory setting may be overwritten by calling factory instance method - * {@link #setUseWriteReplace(boolean)} - * - * @since 3.4 - */ - public static volatile boolean useWriteReplace = true; - - /* - * methods allowing individual factory settings for factoryUseCache and factoryWriteReplace to be reset - */ - - /** - * test whether this factory uses the proxy cache - * @return true if this factory uses the proxy cache otherwise false - */ - public boolean isUseCache() - { - return factoryUseCache; - } - - /** - * configure whether this factory should use the proxy cache - * @param useCache true if this factory should use the proxy cache and false if it should not use the cache - * @throws RuntimeException if a default interceptor has been set for the factory - */ - public void setUseCache(boolean useCache) - { - // we cannot allow caching to be used if the factory is configured to install a default interceptor - // field into generated classes - if (handler != null && useCache) { - throw new RuntimeException("caching cannot be enabled if the factory default interceptor has been set"); - } - factoryUseCache = useCache; - } - - /** - * test whether this factory installs a writeReplace method in created classes - * @return true if this factory installs a writeReplace method in created classes otherwise false - */ - public boolean isUseWriteReplace() - { - return factoryWriteReplace; - } - - /** - * configure whether this factory should add a writeReplace method to created classes - * @param useWriteReplace true if this factory should add a writeReplace method to created classes and false if it - * should not add a writeReplace method - */ - public void setUseWriteReplace(boolean useWriteReplace) - { - factoryWriteReplace = useWriteReplace; - } - - private static WeakHashMap proxyCache = new WeakHashMap(); - - /** - * determine if a class is a javassist proxy class - * @param cl - * @return true if the class is a javassist proxy class otherwise false - */ - public static boolean isProxyClass(Class cl) - { - // all proxies implement Proxy or ProxyObject. nothing else should. - return (Proxy.class.isAssignableFrom(cl)); - } - - /** - * used to store details of a specific proxy class in the second tier of the proxy cache. this entry - * will be located in a hashmap keyed by the unique identifying name of the proxy class. the hashmap is - * located in a weak hashmap keyed by the classloader common to all proxy classes in the second tier map. - */ - static class ProxyDetails { - /** - * the unique signature of any method filter whose behaviour will be met by this class. each bit in - * the byte array is set if the filter redirects the corresponding super or interface method and clear - * if it does not redirect it. - */ - byte[] signature; - /** - * a hexadecimal string representation of the signature bit sequence. this string also forms part - * of the proxy class name. - */ - WeakReference proxyClass; - /** - * a flag which is true this class employs writeReplace to perform serialization of its instances - * and false if serialization must employ of a ProxyObjectOutputStream and ProxyObjectInputStream - */ - boolean isUseWriteReplace; - - ProxyDetails(byte[] signature, Class proxyClass, boolean isUseWriteReplace) - { - this.signature = signature; - this.proxyClass = new WeakReference(proxyClass); - this.isUseWriteReplace = isUseWriteReplace; - } - } - - /** - * Constructs a factory of proxy class. - */ - public ProxyFactory() { - superClass = null; - interfaces = null; - methodFilter = null; - handler = null; - signature = null; - signatureMethods = null; - hasGetHandler = false; - thisClass = null; - writeDirectory = null; - factoryUseCache = useCache; - factoryWriteReplace = useWriteReplace; - } - - /** - * Sets the super class of a proxy class. - */ - public void setSuperclass(Class clazz) { - superClass = clazz; - // force recompute of signature - signature = null; - } - - /** - * Obtains the super class set by setSuperclass(). - * - * @since 3.4 - */ - public Class getSuperclass() { return superClass; } - - /** - * Sets the interfaces of a proxy class. - */ - public void setInterfaces(Class[] ifs) { - interfaces = ifs; - // force recompute of signature - signature = null; - } - - /** - * Obtains the interfaces set by setInterfaces. - * - * @since 3.4 - */ - public Class[] getInterfaces() { return interfaces; } - - /** - * Sets a filter that selects the methods that will be controlled by a handler. - */ - public void setFilter(MethodFilter mf) { - methodFilter = mf; - // force recompute of signature - signature = null; - } - - /** - * Generates a proxy class using the current filter. - */ - public Class createClass() { - if (signature == null) { - computeSignature(methodFilter); - } - return createClass1(); - } - - /** - * Generates a proxy class using the supplied filter. - */ - public Class createClass(MethodFilter filter) { - computeSignature(filter); - return createClass1(); - } - - /** - * Generates a proxy class with a specific signature. - * access is package local so ProxyObjectInputStream can use this - * @param signature - * @return - */ - Class createClass(byte[] signature) - { - installSignature(signature); - return createClass1(); - } - - private Class createClass1() { - if (thisClass == null) { - ClassLoader cl = getClassLoader(); - synchronized (proxyCache) { - if (factoryUseCache) - createClass2(cl); - else - createClass3(cl); - } - } - - // don't retain any unwanted references - Class result = thisClass; - thisClass = null; - - return result; - } - - private static char[] hexDigits = - { '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; - - public String getKey(Class superClass, Class[] interfaces, byte[] signature, boolean useWriteReplace) - { - StringBuffer sbuf = new StringBuffer(); - if (superClass != null){ - sbuf.append(superClass.getName()); - } - sbuf.append(":"); - for (int i = 0; i < interfaces.length; i++) { - sbuf.append(interfaces[i].getName()); - sbuf.append(":"); - } - for (int i = 0; i < signature.length; i++) { - byte b = signature[i]; - int lo = b & 0xf; - int hi = (b >> 4) & 0xf; - sbuf.append(hexDigits[lo]); - sbuf.append(hexDigits[hi]); - } - if (useWriteReplace) { - sbuf.append(":w"); - } - - return sbuf.toString(); - } - - private void createClass2(ClassLoader cl) { - String key = getKey(superClass, interfaces, signature, factoryWriteReplace); - /* - * Excessive concurrency causes a large memory footprint and slows the - * execution speed down (with JDK 1.5). Thus, we use a jumbo lock for - * reducing concrrency. - */ - // synchronized (proxyCache) { - HashMap cacheForTheLoader = (HashMap)proxyCache.get(cl); - ProxyDetails details; - if (cacheForTheLoader == null) { - cacheForTheLoader = new HashMap(); - proxyCache.put(cl, cacheForTheLoader); - } - details = (ProxyDetails)cacheForTheLoader.get(key); - if (details != null) { - WeakReference reference = details.proxyClass; - thisClass = (Class)reference.get(); - if (thisClass != null) { - return; - } - } - createClass3(cl); - details = new ProxyDetails(signature, thisClass, factoryWriteReplace); - cacheForTheLoader.put(key, details); - // } - } - - private void createClass3(ClassLoader cl) { - // we need a new class so we need a new class name - allocateClassName(); - - try { - ClassFile cf = make(); - if (writeDirectory != null) - FactoryHelper.writeFile(cf, writeDirectory); - - thisClass = FactoryHelper.toClass(cf, cl, getDomain()); - setField(FILTER_SIGNATURE_FIELD, signature); - // legacy behaviour : we only set the default interceptor static field if we are not using the cache - if (!factoryUseCache) { - setField(DEFAULT_INTERCEPTOR, handler); - } - } - catch (CannotCompileException e) { - throw new RuntimeException(e.getMessage(), e); - } - - } - - private void setField(String fieldName, Object value) { - if (thisClass != null && value != null) - try { - Field f = thisClass.getField(fieldName); - SecurityActions.setAccessible(f, true); - f.set(null, value); - SecurityActions.setAccessible(f, false); - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - static byte[] getFilterSignature(Class clazz) { - return (byte[])getField(clazz, FILTER_SIGNATURE_FIELD); - } - - private static Object getField(Class clazz, String fieldName) { - try { - Field f = clazz.getField(fieldName); - f.setAccessible(true); - Object value = f.get(null); - f.setAccessible(false); - return value; - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * Obtains the method handler of the given proxy object. - * - * @param p a proxy object. - * @return the method handler. - * @since 3.16 - */ - public static MethodHandler getHandler(Proxy p) { - try { - Field f = p.getClass().getDeclaredField(HANDLER); - f.setAccessible(true); - Object value = f.get(p); - f.setAccessible(false); - return (MethodHandler)value; - } - catch (Exception e) { - throw new RuntimeException(e); - } - } - - /** - * A provider of class loaders. - * - * @see #classLoaderProvider - * @since 3.4 - */ - public static interface ClassLoaderProvider { - /** - * Returns a class loader. - * - * @param pf a proxy factory that is going to obtain a class loader. - */ - public ClassLoader get(ProxyFactory pf); - } - - /** - * A provider used by createClass() for obtaining - * a class loader. - * get() on this ClassLoaderProvider object - * is called to obtain a class loader. - * - *

The value of this field can be updated for changing the default - * implementation. - * - *

Example: - * 

-     * ProxyFactory.classLoaderProvider = new ProxyFactory.ClassLoaderProvider() {
-     *     public ClassLoader get(ProxyFactory pf) {
-     *         return Thread.currentThread().getContextClassLoader();
-     *     }
-     * };
-     *
- * - * @since 3.4 - */ - public static ClassLoaderProvider classLoaderProvider - = new ClassLoaderProvider() { - public ClassLoader get(ProxyFactory pf) { - return pf.getClassLoader0(); - } - }; - - protected ClassLoader getClassLoader() { - return classLoaderProvider.get(this); - } - - protected ClassLoader getClassLoader0() { - ClassLoader loader = null; - if (superClass != null && !superClass.getName().equals("java.lang.Object")) - loader = superClass.getClassLoader(); - else if (interfaces != null && interfaces.length > 0) - loader = interfaces[0].getClassLoader(); - - if (loader == null) { - loader = getClass().getClassLoader(); - // In case javassist is in the endorsed dir - if (loader == null) { - loader = Thread.currentThread().getContextClassLoader(); - if (loader == null) - loader = ClassLoader.getSystemClassLoader(); - } - } - - return loader; - } - - protected ProtectionDomain getDomain() { - Class clazz; - if (superClass != null && !superClass.getName().equals("java.lang.Object")) - clazz = superClass; - else if (interfaces != null && interfaces.length > 0) - clazz = interfaces[0]; - else - clazz = this.getClass(); - - return clazz.getProtectionDomain(); - } - - /** - * Creates a proxy class and returns an instance of that class. - * - * @param paramTypes parameter types for a constructor. - * @param args arguments passed to a constructor. - * @param mh the method handler for the proxy class. - * @since 3.4 - */ - public Object create(Class[] paramTypes, Object[] args, MethodHandler mh) - throws NoSuchMethodException, IllegalArgumentException, - InstantiationException, IllegalAccessException, InvocationTargetException - { - Object obj = create(paramTypes, args); - ((Proxy)obj).setHandler(mh); - return obj; - } - - /** - * Creates a proxy class and returns an instance of that class. - * - * @param paramTypes parameter types for a constructor. - * @param args arguments passed to a constructor. - */ - public Object create(Class[] paramTypes, Object[] args) - throws NoSuchMethodException, IllegalArgumentException, - InstantiationException, IllegalAccessException, InvocationTargetException - { - Class c = createClass(); - Constructor cons = c.getConstructor(paramTypes); - return cons.newInstance(args); - } - - /** - * Sets the default invocation handler. This invocation handler is shared - * among all the instances of a proxy class unless another is explicitly - * specified. - * @deprecated since 3.12 - * use of this method is incompatible with proxy class caching. - * instead clients should call method {@link Proxy#setHandler(MethodHandler)} to set the handler - * for each newly created proxy instance. - * calling this method will automatically disable caching of classes created by the proxy factory. - */ - public void setHandler(MethodHandler mi) { - // if we were using the cache and the handler is non-null then we must stop caching - if (factoryUseCache && mi != null) { - factoryUseCache = false; - // clear any currently held class so we don't try to reuse it or set its handler field - thisClass = null; - } - handler = mi; - // this retains the behaviour of the old code which resets any class we were holding on to - // this is probably not what is wanted - setField(DEFAULT_INTERCEPTOR, handler); - } - - /** - * A unique class name generator. - */ - public static interface UniqueName { - /** - * Returns a unique class name. - * - * @param classname the super class name of the proxy class. - */ - String get(String classname); - } - - /** - * A unique class name generator. - * Replacing this generator changes the algorithm to generate a - * unique name. The get method does not have to be - * a synchronized method since the access to this field - * is mutually exclusive and thus thread safe. - */ - public static UniqueName nameGenerator = new UniqueName() { - private final String sep = "_$$_jvst" + Integer.toHexString(this.hashCode() & 0xfff) + "_"; - private int counter = 0; - - public String get(String classname) { - return classname + sep + Integer.toHexString(counter++); - } - }; - - private static String makeProxyName(String classname) { - synchronized (nameGenerator) { - return nameGenerator.get(classname); - } - } - - private ClassFile make() throws CannotCompileException { - ClassFile cf = new ClassFile(false, classname, superName); - cf.setAccessFlags(AccessFlag.PUBLIC); - setInterfaces(cf, interfaces, hasGetHandler ? Proxy.class : ProxyObject.class); - ConstPool pool = cf.getConstPool(); - - // legacy: we only add the static field for the default interceptor if caching is disabled - if (!factoryUseCache) { - FieldInfo finfo = new FieldInfo(pool, DEFAULT_INTERCEPTOR, HANDLER_TYPE); - finfo.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC); - cf.addField(finfo); - } - - // handler is per instance - FieldInfo finfo2 = new FieldInfo(pool, HANDLER, HANDLER_TYPE); - finfo2.setAccessFlags(AccessFlag.PRIVATE); - cf.addField(finfo2); - - // filter signature is per class - FieldInfo finfo3 = new FieldInfo(pool, FILTER_SIGNATURE_FIELD, FILTER_SIGNATURE_TYPE); - finfo3.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC); - cf.addField(finfo3); - - // the proxy class serial uid must always be a fixed value - FieldInfo finfo4 = new FieldInfo(pool, SERIAL_VERSION_UID_FIELD, SERIAL_VERSION_UID_TYPE); - finfo4.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC| AccessFlag.FINAL); - cf.addField(finfo4); - - // HashMap allMethods = getMethods(superClass, interfaces); - // int size = allMethods.size(); - makeConstructors(classname, cf, pool, classname); - - ArrayList forwarders = new ArrayList(); - int s = overrideMethods(cf, pool, classname, forwarders); - addClassInitializer(cf, pool, classname, s, forwarders); - addSetter(classname, cf, pool); - if (!hasGetHandler) - addGetter(classname, cf, pool); - - if (factoryWriteReplace) { - try { - cf.addMethod(makeWriteReplace(pool)); - } - catch (DuplicateMemberException e) { - // writeReplace() is already declared in the super class/interfaces. - } - } - - thisClass = null; - return cf; - } - - private void checkClassAndSuperName() { - if (interfaces == null) - interfaces = new Class[0]; - - if (superClass == null) { - superClass = OBJECT_TYPE; - superName = superClass.getName(); - basename = interfaces.length == 0 ? superName - : interfaces[0].getName(); - } else { - superName = superClass.getName(); - basename = superName; - } - - if (Modifier.isFinal(superClass.getModifiers())) - throw new RuntimeException(superName + " is final"); - - if (basename.startsWith("java.")) - basename = "org.javassist.tmp." + basename; - } - - private void allocateClassName() { - classname = makeProxyName(basename); - } - - private static Comparator sorter = new Comparator() { - - public int compare(Object o1, Object o2) { - Map.Entry e1 = (Map.Entry)o1; - Map.Entry e2 = (Map.Entry)o2; - String key1 = (String)e1.getKey(); - String key2 = (String)e2.getKey(); - return key1.compareTo(key2); - } - }; - - private void makeSortedMethodList() { - checkClassAndSuperName(); - - hasGetHandler = false; // getMethods() may set this to true. - HashMap allMethods = getMethods(superClass, interfaces); - signatureMethods = new ArrayList(allMethods.entrySet()); - Collections.sort(signatureMethods, sorter); - } - - private void computeSignature(MethodFilter filter) // throws CannotCompileException - { - makeSortedMethodList(); - - int l = signatureMethods.size(); - int maxBytes = ((l + 7) >> 3); - signature = new byte[maxBytes]; - for (int idx = 0; idx < l; idx++) - { - Map.Entry e = (Map.Entry)signatureMethods.get(idx); - Method m = (Method)e.getValue(); - int mod = m.getModifiers(); - if (!Modifier.isFinal(mod) && !Modifier.isStatic(mod) - && isVisible(mod, basename, m) && (filter == null || filter.isHandled(m))) { - setBit(signature, idx); - } - } - } - - private void installSignature(byte[] signature) // throws CannotCompileException - { - makeSortedMethodList(); - - int l = signatureMethods.size(); - int maxBytes = ((l + 7) >> 3); - if (signature.length != maxBytes) { - throw new RuntimeException("invalid filter signature length for deserialized proxy class"); - } - - this.signature = signature; - } - - private boolean testBit(byte[] signature, int idx) { - int byteIdx = idx >> 3; - if (byteIdx > signature.length) { - return false; - } else { - int bitIdx = idx & 0x7; - int mask = 0x1 << bitIdx; - int sigByte = signature[byteIdx]; - return ((sigByte & mask) != 0); - } - } - - private void setBit(byte[] signature, int idx) { - int byteIdx = idx >> 3; - if (byteIdx < signature.length) { - int bitIdx = idx & 0x7; - int mask = 0x1 << bitIdx; - int sigByte = signature[byteIdx]; - signature[byteIdx] = (byte)(sigByte | mask); - } - } - - private static void setInterfaces(ClassFile cf, Class[] interfaces, Class proxyClass) { - String setterIntf = proxyClass.getName(); - String[] list; - if (interfaces == null || interfaces.length == 0) - list = new String[] { setterIntf }; - else { - list = new String[interfaces.length + 1]; - for (int i = 0; i < interfaces.length; i++) - list[i] = interfaces[i].getName(); - - list[interfaces.length] = setterIntf; - } - - cf.setInterfaces(list); - } - - private static void addClassInitializer(ClassFile cf, ConstPool cp, - String classname, int size, ArrayList forwarders) - throws CannotCompileException - { - FieldInfo finfo = new FieldInfo(cp, HOLDER, HOLDER_TYPE); - finfo.setAccessFlags(AccessFlag.PRIVATE | AccessFlag.STATIC); - cf.addField(finfo); - MethodInfo minfo = new MethodInfo(cp, "", "()V"); - minfo.setAccessFlags(AccessFlag.STATIC); - setThrows(minfo, cp, new Class[] { ClassNotFoundException.class }); - - Bytecode code = new Bytecode(cp, 0, 2); - code.addIconst(size * 2); - code.addAnewarray("java.lang.reflect.Method"); - final int varArray = 0; - code.addAstore(varArray); - - // forName() must be called here. Otherwise, the class might be - // invisible. - code.addLdc(classname); - code.addInvokestatic("java.lang.Class", - "forName", "(Ljava/lang/String;)Ljava/lang/Class;"); - final int varClass = 1; - code.addAstore(varClass); - - Iterator it = forwarders.iterator(); - while (it.hasNext()) { - Find2MethodsArgs args = (Find2MethodsArgs)it.next(); - callFind2Methods(code, args.methodName, args.delegatorName, - args.origIndex, args.descriptor, varClass, varArray); - } - - code.addAload(varArray); - code.addPutstatic(classname, HOLDER, HOLDER_TYPE); - - code.addLconst(SERIAL_VERSION_UID_VALUE); - code.addPutstatic(classname, SERIAL_VERSION_UID_FIELD, SERIAL_VERSION_UID_TYPE); - code.addOpcode(Bytecode.RETURN); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - } - - /** - * @param thisMethod might be null. - */ - private static void callFind2Methods(Bytecode code, String superMethod, String thisMethod, - int index, String desc, int classVar, int arrayVar) { - String findClass = RuntimeSupport.class.getName(); - String findDesc - = "(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/reflect/Method;)V"; - - code.addAload(classVar); - code.addLdc(superMethod); - if (thisMethod == null) - code.addOpcode(Opcode.ACONST_NULL); - else - code.addLdc(thisMethod); - - code.addIconst(index); - code.addLdc(desc); - code.addAload(arrayVar); - code.addInvokestatic(findClass, "find2Methods", findDesc); - } - - private static void addSetter(String classname, ClassFile cf, ConstPool cp) - throws CannotCompileException - { - MethodInfo minfo = new MethodInfo(cp, HANDLER_SETTER, - HANDLER_SETTER_TYPE); - minfo.setAccessFlags(AccessFlag.PUBLIC); - Bytecode code = new Bytecode(cp, 2, 2); - code.addAload(0); - code.addAload(1); - code.addPutfield(classname, HANDLER, HANDLER_TYPE); - code.addOpcode(Bytecode.RETURN); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - } - - private static void addGetter(String classname, ClassFile cf, ConstPool cp) - throws CannotCompileException - { - MethodInfo minfo = new MethodInfo(cp, HANDLER_GETTER, - HANDLER_GETTER_TYPE); - minfo.setAccessFlags(AccessFlag.PUBLIC); - Bytecode code = new Bytecode(cp, 1, 1); - code.addAload(0); - code.addGetfield(classname, HANDLER, HANDLER_TYPE); - code.addOpcode(Bytecode.ARETURN); - minfo.setCodeAttribute(code.toCodeAttribute()); - cf.addMethod(minfo); - } - - private int overrideMethods(ClassFile cf, ConstPool cp, String className, ArrayList forwarders) - throws CannotCompileException - { - String prefix = makeUniqueName("_d", signatureMethods); - Iterator it = signatureMethods.iterator(); - int index = 0; - while (it.hasNext()) { - Map.Entry e = (Map.Entry)it.next(); - String key = (String)e.getKey(); - Method meth = (Method)e.getValue(); - if (ClassFile.MAJOR_VERSION < ClassFile.JAVA_5 || !isBridge(meth)) - if (testBit(signature, index)) { - override(className, meth, prefix, index, - keyToDesc(key, meth), cf, cp, forwarders); - } - - index++; - } - - return index; - } - - private static boolean isBridge(Method m) { - return m.isBridge(); - } - - private void override(String thisClassname, Method meth, String prefix, - int index, String desc, ClassFile cf, ConstPool cp, ArrayList forwarders) - throws CannotCompileException - { - Class declClass = meth.getDeclaringClass(); - String delegatorName = prefix + index + meth.getName(); - if (Modifier.isAbstract(meth.getModifiers())) - delegatorName = null; - else { - MethodInfo delegator - = makeDelegator(meth, desc, cp, declClass, delegatorName); - // delegator is not a bridge method. See Sec. 15.12.4.5 of JLS 3rd Ed. - delegator.setAccessFlags(delegator.getAccessFlags() & ~AccessFlag.BRIDGE); - cf.addMethod(delegator); - } - - MethodInfo forwarder - = makeForwarder(thisClassname, meth, desc, cp, declClass, - delegatorName, index, forwarders); - cf.addMethod(forwarder); - } - - private void makeConstructors(String thisClassName, ClassFile cf, - ConstPool cp, String classname) throws CannotCompileException - { - Constructor[] cons = SecurityActions.getDeclaredConstructors(superClass); - // legacy: if we are not caching then we need to initialise the default handler - boolean doHandlerInit = !factoryUseCache; - for (int i = 0; i < cons.length; i++) { - Constructor c = cons[i]; - int mod = c.getModifiers(); - if (!Modifier.isFinal(mod) && !Modifier.isPrivate(mod) - && isVisible(mod, basename, c)) { - MethodInfo m = makeConstructor(thisClassName, c, cp, superClass, doHandlerInit); - cf.addMethod(m); - } - } - } - - private static String makeUniqueName(String name, List sortedMethods) { - if (makeUniqueName0(name, sortedMethods.iterator())) - return name; - - for (int i = 100; i < 999; i++) { - String s = name + i; - if (makeUniqueName0(s, sortedMethods.iterator())) - return s; - } - - throw new RuntimeException("cannot make a unique method name"); - } - - private static boolean makeUniqueName0(String name, Iterator it) { - while (it.hasNext()) { - Map.Entry e = (Map.Entry)it.next(); - String key = (String)e.getKey(); - if (key.startsWith(name)) - return false; - } - - return true; - } - - /** - * Returns true if the method is visible from the package. - * - * @param mod the modifiers of the method. - */ - private static boolean isVisible(int mod, String from, Member meth) { - if ((mod & Modifier.PRIVATE) != 0) - return false; - else if ((mod & (Modifier.PUBLIC | Modifier.PROTECTED)) != 0) - return true; - else { - String p = getPackageName(from); - String q = getPackageName(meth.getDeclaringClass().getName()); - if (p == null) - return q == null; - else - return p.equals(q); - } - } - - private static String getPackageName(String name) { - int i = name.lastIndexOf('.'); - if (i < 0) - return null; - else - return name.substring(0, i); - } - - /* getMethods() may set hasGetHandler to true. - */ - private HashMap getMethods(Class superClass, Class[] interfaceTypes) { - HashMap hash = new HashMap(); - HashSet set = new HashSet(); - for (int i = 0; i < interfaceTypes.length; i++) - getMethods(hash, interfaceTypes[i], set); - - getMethods(hash, superClass, set); - return hash; - } - - private void getMethods(HashMap hash, Class clazz, Set visitedClasses) { - // This both speeds up scanning by avoiding duplicate interfaces and is needed to - // ensure that superinterfaces are always scanned before subinterfaces. - if (!visitedClasses.add(clazz)) - return; - - Class[] ifs = clazz.getInterfaces(); - for (int i = 0; i < ifs.length; i++) - getMethods(hash, ifs[i], visitedClasses); - - Class parent = clazz.getSuperclass(); - if (parent != null) - getMethods(hash, parent, visitedClasses); - - /* Java 5 or later allows covariant return types. - * It also allows contra-variant parameter types - * if a super class is a generics with concrete type arguments - * such as Foo. So the method-overriding rule is complex. - */ - Method[] methods = SecurityActions.getDeclaredMethods(clazz); - for (int i = 0; i < methods.length; i++) - if (!Modifier.isPrivate(methods[i].getModifiers())) { - Method m = methods[i]; - String key = m.getName() + ':' + RuntimeSupport.makeDescriptor(m); // see keyToDesc(). - if (key.startsWith(HANDLER_GETTER_KEY)) - hasGetHandler = true; - - // JIRA JASSIST-85 - // put the method to the cache, retrieve previous definition (if any) - Method oldMethod = (Method)hash.put(key, methods[i]); - - // check if visibility has been reduced - if (null != oldMethod && Modifier.isPublic(oldMethod.getModifiers()) - && !Modifier.isPublic(methods[i].getModifiers()) ) { - // we tried to overwrite a public definition with a non-public definition, - // use the old definition instead. - hash.put(key, oldMethod); - } - } - } - - private static final String HANDLER_GETTER_KEY - = HANDLER_GETTER + ":()"; - - private static String keyToDesc(String key, Method m) { - return key.substring(key.indexOf(':') + 1); - } - - private static MethodInfo makeConstructor(String thisClassName, Constructor cons, - ConstPool cp, Class superClass, boolean doHandlerInit) { - String desc = RuntimeSupport.makeDescriptor(cons.getParameterTypes(), - Void.TYPE); - MethodInfo minfo = new MethodInfo(cp, "", desc); - minfo.setAccessFlags(Modifier.PUBLIC); // cons.getModifiers() & ~Modifier.NATIVE - setThrows(minfo, cp, cons.getExceptionTypes()); - Bytecode code = new Bytecode(cp, 0, 0); - - // legacy: if we are not using caching then we initialise the instance's handler - // from the class's static default interceptor and skip the next few instructions if - // it is non-null - if (doHandlerInit) { - code.addAload(0); - code.addGetstatic(thisClassName, DEFAULT_INTERCEPTOR, HANDLER_TYPE); - code.addPutfield(thisClassName, HANDLER, HANDLER_TYPE); - code.addGetstatic(thisClassName, DEFAULT_INTERCEPTOR, HANDLER_TYPE); - code.addOpcode(Opcode.IFNONNULL); - code.addIndex(10); - } - // if caching is enabled then we don't have a handler to initialise so this else branch will install - // the handler located in the static field of class RuntimeSupport. - code.addAload(0); - code.addGetstatic(NULL_INTERCEPTOR_HOLDER, DEFAULT_INTERCEPTOR, HANDLER_TYPE); - code.addPutfield(thisClassName, HANDLER, HANDLER_TYPE); - int pc = code.currentPc(); - - code.addAload(0); - int s = addLoadParameters(code, cons.getParameterTypes(), 1); - code.addInvokespecial(superClass.getName(), "", desc); - code.addOpcode(Opcode.RETURN); - code.setMaxLocals(s + 1); - CodeAttribute ca = code.toCodeAttribute(); - minfo.setCodeAttribute(ca); - - StackMapTable.Writer writer = new StackMapTable.Writer(32); - writer.sameFrame(pc); - ca.setAttribute(writer.toStackMapTable(cp)); - return minfo; - } - - private static MethodInfo makeDelegator(Method meth, String desc, - ConstPool cp, Class declClass, String delegatorName) { - MethodInfo delegator = new MethodInfo(cp, delegatorName, desc); - delegator.setAccessFlags(Modifier.FINAL | Modifier.PUBLIC - | (meth.getModifiers() & ~(Modifier.PRIVATE - | Modifier.PROTECTED - | Modifier.ABSTRACT - | Modifier.NATIVE - | Modifier.SYNCHRONIZED))); - setThrows(delegator, cp, meth); - Bytecode code = new Bytecode(cp, 0, 0); - code.addAload(0); - int s = addLoadParameters(code, meth.getParameterTypes(), 1); - code.addInvokespecial(declClass.getName(), meth.getName(), desc); - addReturn(code, meth.getReturnType()); - code.setMaxLocals(++s); - delegator.setCodeAttribute(code.toCodeAttribute()); - return delegator; - } - - /** - * @param delegatorName null if the original method is abstract. - */ - private static MethodInfo makeForwarder(String thisClassName, - Method meth, String desc, ConstPool cp, - Class declClass, String delegatorName, int index, - ArrayList forwarders) { - MethodInfo forwarder = new MethodInfo(cp, meth.getName(), desc); - forwarder.setAccessFlags(Modifier.FINAL - | (meth.getModifiers() & ~(Modifier.ABSTRACT - | Modifier.NATIVE - | Modifier.SYNCHRONIZED))); - setThrows(forwarder, cp, meth); - int args = Descriptor.paramSize(desc); - Bytecode code = new Bytecode(cp, 0, args + 2); - /* - * static { - * methods[index * 2] - * = RuntimeSupport.findSuperMethod(this, , ); - * methods[index * 2 + 1] - * = RuntimeSupport.findMethod(this, , ); - * or = null // the original method is abstract. - * } - * : - * return ($r)handler.invoke(this, methods[index * 2], - * methods[index * 2 + 1], $args); - */ - int origIndex = index * 2; - int delIndex = index * 2 + 1; - int arrayVar = args + 1; - code.addGetstatic(thisClassName, HOLDER, HOLDER_TYPE); - code.addAstore(arrayVar); - - forwarders.add(new Find2MethodsArgs(meth.getName(), delegatorName, desc, origIndex)); - - code.addAload(0); - code.addGetfield(thisClassName, HANDLER, HANDLER_TYPE); - code.addAload(0); - - code.addAload(arrayVar); - code.addIconst(origIndex); - code.addOpcode(Opcode.AALOAD); - - code.addAload(arrayVar); - code.addIconst(delIndex); - code.addOpcode(Opcode.AALOAD); - - makeParameterList(code, meth.getParameterTypes()); - code.addInvokeinterface(MethodHandler.class.getName(), "invoke", - "(Ljava/lang/Object;Ljava/lang/reflect/Method;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;", - 5); - Class retType = meth.getReturnType(); - addUnwrapper(code, retType); - addReturn(code, retType); - - CodeAttribute ca = code.toCodeAttribute(); - forwarder.setCodeAttribute(ca); - return forwarder; - } - - static class Find2MethodsArgs { - String methodName, delegatorName, descriptor; - int origIndex; - - Find2MethodsArgs(String mname, String dname, String desc, int index) { - methodName = mname; - delegatorName = dname; - descriptor = desc; - origIndex = index; - } - } - - private static void setThrows(MethodInfo minfo, ConstPool cp, Method orig) { - Class[] exceptions = orig.getExceptionTypes(); - setThrows(minfo, cp, exceptions); - } - - private static void setThrows(MethodInfo minfo, ConstPool cp, - Class[] exceptions) { - if (exceptions.length == 0) - return; - - String[] list = new String[exceptions.length]; - for (int i = 0; i < exceptions.length; i++) - list[i] = exceptions[i].getName(); - - ExceptionsAttribute ea = new ExceptionsAttribute(cp); - ea.setExceptions(list); - minfo.setExceptionsAttribute(ea); - } - - private static int addLoadParameters(Bytecode code, Class[] params, - int offset) { - int stacksize = 0; - int n = params.length; - for (int i = 0; i < n; ++i) - stacksize += addLoad(code, stacksize + offset, params[i]); - - return stacksize; - } - - private static int addLoad(Bytecode code, int n, Class type) { - if (type.isPrimitive()) { - if (type == Long.TYPE) { - code.addLload(n); - return 2; - } - else if (type == Float.TYPE) - code.addFload(n); - else if (type == Double.TYPE) { - code.addDload(n); - return 2; - } - else - code.addIload(n); - } - else - code.addAload(n); - - return 1; - } - - private static int addReturn(Bytecode code, Class type) { - if (type.isPrimitive()) { - if (type == Long.TYPE) { - code.addOpcode(Opcode.LRETURN); - return 2; - } - else if (type == Float.TYPE) - code.addOpcode(Opcode.FRETURN); - else if (type == Double.TYPE) { - code.addOpcode(Opcode.DRETURN); - return 2; - } - else if (type == Void.TYPE) { - code.addOpcode(Opcode.RETURN); - return 0; - } - else - code.addOpcode(Opcode.IRETURN); - } - else - code.addOpcode(Opcode.ARETURN); - - return 1; - } - - private static void makeParameterList(Bytecode code, Class[] params) { - int regno = 1; - int n = params.length; - code.addIconst(n); - code.addAnewarray("java/lang/Object"); - for (int i = 0; i < n; i++) { - code.addOpcode(Opcode.DUP); - code.addIconst(i); - Class type = params[i]; - if (type.isPrimitive()) - regno = makeWrapper(code, type, regno); - else { - code.addAload(regno); - regno++; - } - - code.addOpcode(Opcode.AASTORE); - } - } - - private static int makeWrapper(Bytecode code, Class type, int regno) { - int index = FactoryHelper.typeIndex(type); - String wrapper = FactoryHelper.wrapperTypes[index]; - code.addNew(wrapper); - code.addOpcode(Opcode.DUP); - addLoad(code, regno, type); - code.addInvokespecial(wrapper, "", - FactoryHelper.wrapperDesc[index]); - return regno + FactoryHelper.dataSize[index]; - } - - private static void addUnwrapper(Bytecode code, Class type) { - if (type.isPrimitive()) { - if (type == Void.TYPE) - code.addOpcode(Opcode.POP); - else { - int index = FactoryHelper.typeIndex(type); - String wrapper = FactoryHelper.wrapperTypes[index]; - code.addCheckcast(wrapper); - code.addInvokevirtual(wrapper, - FactoryHelper.unwarpMethods[index], - FactoryHelper.unwrapDesc[index]); - } - } - else - code.addCheckcast(type.getName()); - } - - private static MethodInfo makeWriteReplace(ConstPool cp) { - MethodInfo minfo = new MethodInfo(cp, "writeReplace", "()Ljava/lang/Object;"); - String[] list = new String[1]; - list[0] = "java.io.ObjectStreamException"; - ExceptionsAttribute ea = new ExceptionsAttribute(cp); - ea.setExceptions(list); - minfo.setExceptionsAttribute(ea); - Bytecode code = new Bytecode(cp, 0, 1); - code.addAload(0); - code.addInvokestatic("javassist.util.proxy.RuntimeSupport", - "makeSerializedProxy", - "(Ljava/lang/Object;)Ljavassist/util/proxy/SerializedProxy;"); - code.addOpcode(Opcode.ARETURN); - minfo.setCodeAttribute(code.toCodeAttribute()); - return minfo; - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java b/src/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java deleted file mode 100644 index 59f8f8b..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java +++ /dev/null @@ -1,44 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -/** - * The interface implemented by proxy classes. - * This interface is available only if the super class of the proxy object - * does not have a getHandler() method. If the super class - * has getHandler, then Proxy interface is - * available. - * - * @see ProxyFactory - * @see Proxy - */ -public interface ProxyObject extends Proxy { - /** - * Sets a handler. It can be used for changing handlers - * during runtime. - */ - void setHandler(MethodHandler mi); - - /** - * Get the handler. - * This can be used to access the underlying MethodHandler - * or to serialize it properly. - * - * @see ProxyFactory#getHandler(Proxy) - */ - MethodHandler getHandler(); -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java b/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java deleted file mode 100644 index ee81e88..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java +++ /dev/null @@ -1,100 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.io.IOException; -import java.io.InputStream; -import java.io.ObjectInputStream; -import java.io.ObjectStreamClass; - -/** - * An input stream class which knows how to deserialize proxies created via {@link ProxyFactory} and - * serializedo via a {@link ProxyObjectOutputStream}. It must be used when deserialising proxies created - * from a proxy factory configured with {@link ProxyFactory#useWriteReplace} set to false. - * - * @author Andrew Dinn - */ -public class ProxyObjectInputStream extends ObjectInputStream -{ - /** - * create an input stream which can be used to deserialize an object graph which includes proxies created - * using class ProxyFactory. the classloader used to resolve proxy superclass and interface names - * read from the input stream will default to the current thread's context class loader or the system - * classloader if the context class loader is null. - * @param in - * @throws java.io.StreamCorruptedException whenever ObjectInputStream would also do so - * @throws IOException whenever ObjectInputStream would also do so - * @throws SecurityException whenever ObjectInputStream would also do so - * @throws NullPointerException if in is null - */ - public ProxyObjectInputStream(InputStream in) throws IOException - { - super(in); - loader = Thread.currentThread().getContextClassLoader(); - if (loader == null) { - loader = ClassLoader.getSystemClassLoader(); - } - } - - /** - * Reset the loader to be - * @param loader - */ - public void setClassLoader(ClassLoader loader) - { - if (loader != null) { - this.loader = loader; - } else { - loader = ClassLoader.getSystemClassLoader(); - } - } - - protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException { - boolean isProxy = readBoolean(); - if (isProxy) { - String name = (String)readObject(); - Class superClass = loader.loadClass(name); - int length = readInt(); - Class[] interfaces = new Class[length]; - for (int i = 0; i < length; i++) { - name = (String)readObject(); - interfaces[i] = loader.loadClass(name); - } - length = readInt(); - byte[] signature = new byte[length]; - read(signature); - ProxyFactory factory = new ProxyFactory(); - // we must always use the cache and never use writeReplace when using - // ProxyObjectOutputStream and ProxyObjectInputStream - factory.setUseCache(true); - factory.setUseWriteReplace(false); - factory.setSuperclass(superClass); - factory.setInterfaces(interfaces); - Class proxyClass = factory.createClass(signature); - return ObjectStreamClass.lookup(proxyClass); - } else { - return super.readClassDescriptor(); - } - } - - /** - * the loader to use to resolve classes for proxy superclass and interface names read - * from the stream. defaults to the context class loader of the thread which creates - * the input stream or the system class loader if the context class loader is null. - */ - private ClassLoader loader; -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java b/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java deleted file mode 100644 index 84ac6cb..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java +++ /dev/null @@ -1,72 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.io.IOException; -import java.io.ObjectOutputStream; -import java.io.ObjectStreamClass; -import java.io.OutputStream; - -/** - * An input stream class which knows how to serialize proxies created via {@link ProxyFactory}. It must - * be used when serialising proxies created from a proxy factory configured with - * {@link ProxyFactory#useWriteReplace} set to false. Subsequent deserialization of the serialized data - * must employ a {@link ProxyObjectInputStream} - * - * @author Andrew Dinn - */ -public class ProxyObjectOutputStream extends ObjectOutputStream -{ - /** - * create an output stream which can be used to serialize an object graph which includes proxies created - * using class ProxyFactory - * @param out - * @throws IOException whenever ObjectOutputStream would also do so - * @throws SecurityException whenever ObjectOutputStream would also do so - * @throws NullPointerException if out is null - */ - public ProxyObjectOutputStream(OutputStream out) throws IOException - { - super(out); - } - - protected void writeClassDescriptor(ObjectStreamClass desc) throws IOException { - Class cl = desc.forClass(); - if (ProxyFactory.isProxyClass(cl)) { - writeBoolean(true); - Class superClass = cl.getSuperclass(); - Class[] interfaces = cl.getInterfaces(); - byte[] signature = ProxyFactory.getFilterSignature(cl); - String name = superClass.getName(); - writeObject(name); - // we don't write the marker interface ProxyObject - writeInt(interfaces.length - 1); - for (int i = 0; i < interfaces.length; i++) { - Class interfaze = interfaces[i]; - if (interfaze != ProxyObject.class && interfaze != Proxy.class) { - name = interfaces[i].getName(); - writeObject(name); - } - } - writeInt(signature.length); - write(signature); - } else { - writeBoolean(false); - super.writeClassDescriptor(desc); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java b/src/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java deleted file mode 100644 index 9f4bbf5..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java +++ /dev/null @@ -1,271 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.Method; -import java.io.Serializable; - -/** - * Runtime support routines that the classes generated by ProxyFactory use. - * - * @see ProxyFactory - */ -public class RuntimeSupport { - /** - * A method handler that only executes a method. - */ - public static MethodHandler default_interceptor = new DefaultMethodHandler(); - - static class DefaultMethodHandler implements MethodHandler, Serializable { - public Object invoke(Object self, Method m, - Method proceed, Object[] args) - throws Exception - { - return proceed.invoke(self, args); - } - }; - - /** - * Finds two methods specified by the parameters and stores them - * into the given array. - * - * @throws RuntimeException if the methods are not found. - * @see javassist.util.proxy.ProxyFactory - */ - public static void find2Methods(Class clazz, String superMethod, - String thisMethod, int index, - String desc, java.lang.reflect.Method[] methods) - { - methods[index + 1] = thisMethod == null ? null - : findMethod(clazz, thisMethod, desc); - methods[index] = findSuperClassMethod(clazz, superMethod, desc); - } - - /** - * Finds two methods specified by the parameters and stores them - * into the given array. - * - *

Added back for JBoss Seam. See JASSIST-206.

- * - * @throws RuntimeException if the methods are not found. - * @see javassist.util.proxy.ProxyFactory - * @deprecated replaced by {@link #find2Methods(Class, String, String, int, String, Method[])} - */ - public static void find2Methods(Object self, String superMethod, - String thisMethod, int index, - String desc, java.lang.reflect.Method[] methods) - { - methods[index + 1] = thisMethod == null ? null - : findMethod(self, thisMethod, desc); - methods[index] = findSuperMethod(self, superMethod, desc); - } - - /** - * Finds a method with the given name and descriptor. - * It searches only the class of self. - * - *

Added back for JBoss Seam. See JASSIST-206.

- * - * @throws RuntimeException if the method is not found. - * @deprecated replaced by {@link #findMethod(Class, String, String)} - */ - public static Method findMethod(Object self, String name, String desc) { - Method m = findMethod2(self.getClass(), name, desc); - if (m == null) - error(self.getClass(), name, desc); - - return m; - } - - /** - * Finds a method with the given name and descriptor. - * It searches only the class of self. - * - * @throws RuntimeException if the method is not found. - */ - public static Method findMethod(Class clazz, String name, String desc) { - Method m = findMethod2(clazz, name, desc); - if (m == null) - error(clazz, name, desc); - - return m; - } - - /** - * Finds a method that has the given name and descriptor and is declared - * in the super class. - * - * @throws RuntimeException if the method is not found. - */ - public static Method findSuperMethod(Object self, String name, String desc) { - // for JBoss Seam. See JASSIST-183. - Class clazz = self.getClass(); - return findSuperClassMethod(clazz, name, desc); - } - - /** - * Finds a method that has the given name and descriptor and is declared - * in the super class. - * - * @throws RuntimeException if the method is not found. - */ - public static Method findSuperClassMethod(Class clazz, String name, String desc) { - Method m = findSuperMethod2(clazz.getSuperclass(), name, desc); - if (m == null) - m = searchInterfaces(clazz, name, desc); - - if (m == null) - error(clazz, name, desc); - - return m; - } - - private static void error(Class clazz, String name, String desc) { - throw new RuntimeException("not found " + name + ":" + desc - + " in " + clazz.getName()); - } - - private static Method findSuperMethod2(Class clazz, String name, String desc) { - Method m = findMethod2(clazz, name, desc); - if (m != null) - return m; - - Class superClass = clazz.getSuperclass(); - if (superClass != null) { - m = findSuperMethod2(superClass, name, desc); - if (m != null) - return m; - } - - return searchInterfaces(clazz, name, desc); - } - - private static Method searchInterfaces(Class clazz, String name, String desc) { - Method m = null; - Class[] interfaces = clazz.getInterfaces(); - for (int i = 0; i < interfaces.length; i++) { - m = findSuperMethod2(interfaces[i], name, desc); - if (m != null) - return m; - } - - return m; - } - - private static Method findMethod2(Class clazz, String name, String desc) { - Method[] methods = SecurityActions.getDeclaredMethods(clazz); - int n = methods.length; - for (int i = 0; i < n; i++) - if (methods[i].getName().equals(name) - && makeDescriptor(methods[i]).equals(desc)) - return methods[i]; - - return null; - } - - /** - * Makes a descriptor for a given method. - */ - public static String makeDescriptor(Method m) { - Class[] params = m.getParameterTypes(); - return makeDescriptor(params, m.getReturnType()); - } - - /** - * Makes a descriptor for a given method. - * - * @param params parameter types. - * @param retType return type. - */ - public static String makeDescriptor(Class[] params, Class retType) { - StringBuffer sbuf = new StringBuffer(); - sbuf.append('('); - for (int i = 0; i < params.length; i++) - makeDesc(sbuf, params[i]); - - sbuf.append(')'); - if (retType != null) - makeDesc(sbuf, retType); - - return sbuf.toString(); - } - - /** - * Makes a descriptor for a given method. - * - * @param params the descriptor of parameter types. - * @param retType return type. - */ - public static String makeDescriptor(String params, Class retType) { - StringBuffer sbuf = new StringBuffer(params); - makeDesc(sbuf, retType); - return sbuf.toString(); - } - - private static void makeDesc(StringBuffer sbuf, Class type) { - if (type.isArray()) { - sbuf.append('['); - makeDesc(sbuf, type.getComponentType()); - } - else if (type.isPrimitive()) { - if (type == Void.TYPE) - sbuf.append('V'); - else if (type == Integer.TYPE) - sbuf.append('I'); - else if (type == Byte.TYPE) - sbuf.append('B'); - else if (type == Long.TYPE) - sbuf.append('J'); - else if (type == Double.TYPE) - sbuf.append('D'); - else if (type == Float.TYPE) - sbuf.append('F'); - else if (type == Character.TYPE) - sbuf.append('C'); - else if (type == Short.TYPE) - sbuf.append('S'); - else if (type == Boolean.TYPE) - sbuf.append('Z'); - else - throw new RuntimeException("bad type: " + type.getName()); - } - else - sbuf.append('L').append(type.getName().replace('.', '/')) - .append(';'); - } - - /** - * Converts a proxy object to an object that is writable to an - * object stream. This method is called by writeReplace() - * in a proxy class. - * - * @since 3.4 - */ - public static SerializedProxy makeSerializedProxy(Object proxy) - throws java.io.InvalidClassException - { - Class clazz = proxy.getClass(); - - MethodHandler methodHandler = null; - if (proxy instanceof ProxyObject) - methodHandler = ((ProxyObject)proxy).getHandler(); - else if (proxy instanceof Proxy) - methodHandler = ProxyFactory.getHandler((Proxy)proxy); - - return new SerializedProxy(clazz, ProxyFactory.getFilterSignature(clazz), methodHandler); - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java b/src/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java deleted file mode 100644 index d8e8a77..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ -package com.wenshuo.agent.javassist.util.proxy; - -import java.lang.reflect.AccessibleObject; -import java.lang.reflect.Constructor; -import java.lang.reflect.Field; -import java.lang.reflect.Method; -import java.security.AccessController; -import java.security.PrivilegedAction; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; - -class SecurityActions { - static Method[] getDeclaredMethods(final Class clazz) { - if (System.getSecurityManager() == null) - return clazz.getDeclaredMethods(); - else { - return (Method[]) AccessController - .doPrivileged(new PrivilegedAction() { - public Object run() { - return clazz.getDeclaredMethods(); - } - }); - } - } - - static Constructor[] getDeclaredConstructors(final Class clazz) { - if (System.getSecurityManager() == null) - return clazz.getDeclaredConstructors(); - else { - return (Constructor[]) AccessController - .doPrivileged(new PrivilegedAction() { - public Object run() { - return clazz.getDeclaredConstructors(); - } - }); - } - } - - static Method getDeclaredMethod(final Class clazz, final String name, - final Class[] types) throws NoSuchMethodException { - if (System.getSecurityManager() == null) - return clazz.getDeclaredMethod(name, types); - else { - try { - return (Method) AccessController - .doPrivileged(new PrivilegedExceptionAction() { - public Object run() throws Exception { - return clazz.getDeclaredMethod(name, types); - } - }); - } - catch (PrivilegedActionException e) { - if (e.getCause() instanceof NoSuchMethodException) - throw (NoSuchMethodException) e.getCause(); - - throw new RuntimeException(e.getCause()); - } - } - } - - static Constructor getDeclaredConstructor(final Class clazz, - final Class[] types) - throws NoSuchMethodException - { - if (System.getSecurityManager() == null) - return clazz.getDeclaredConstructor(types); - else { - try { - return (Constructor) AccessController - .doPrivileged(new PrivilegedExceptionAction() { - public Object run() throws Exception { - return clazz.getDeclaredConstructor(types); - } - }); - } - catch (PrivilegedActionException e) { - if (e.getCause() instanceof NoSuchMethodException) - throw (NoSuchMethodException) e.getCause(); - - throw new RuntimeException(e.getCause()); - } - } - } - - static void setAccessible(final AccessibleObject ao, - final boolean accessible) { - if (System.getSecurityManager() == null) - ao.setAccessible(accessible); - else { - AccessController.doPrivileged(new PrivilegedAction() { - public Object run() { - ao.setAccessible(accessible); - return null; - } - }); - } - } - - static void set(final Field fld, final Object target, final Object value) - throws IllegalAccessException - { - if (System.getSecurityManager() == null) - fld.set(target, value); - else { - try { - AccessController.doPrivileged(new PrivilegedExceptionAction() { - public Object run() throws Exception { - fld.set(target, value); - return null; - } - }); - } - catch (PrivilegedActionException e) { - if (e.getCause() instanceof NoSuchMethodException) - throw (IllegalAccessException) e.getCause(); - - throw new RuntimeException(e.getCause()); - } - } - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java b/src/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java deleted file mode 100644 index 70e6469..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Javassist, a Java-bytecode translator toolkit. - * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. Alternatively, the contents of this file may be used under - * the terms of the GNU Lesser General Public License Version 2.1 or later, - * or the Apache License Version 2.0. - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - */ - -package com.wenshuo.agent.javassist.util.proxy; - -import java.io.Serializable; -import java.io.ObjectStreamException; -import java.security.AccessController; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; -import java.security.ProtectionDomain; - -/** - * A proxy object is converted into an instance of this class - * when it is written to an output stream. - * - * @see RuntimeSupport#makeSerializedProxy(Object) - */ -class SerializedProxy implements Serializable { - private String superClass; - private String[] interfaces; - private byte[] filterSignature; - private MethodHandler handler; - - SerializedProxy(Class proxy, byte[] sig, MethodHandler h) { - filterSignature = sig; - handler = h; - superClass = proxy.getSuperclass().getName(); - Class[] infs = proxy.getInterfaces(); - int n = infs.length; - interfaces = new String[n - 1]; - String setterInf = ProxyObject.class.getName(); - String setterInf2 = Proxy.class.getName(); - for (int i = 0; i < n; i++) { - String name = infs[i].getName(); - if (!name.equals(setterInf) && !name.equals(setterInf2)) - interfaces[i] = name; - } - } - - /** - * Load class. - * - * @param className the class name - * @return loaded class - * @throws ClassNotFoundException for any error - */ - protected Class loadClass(final String className) throws ClassNotFoundException { - try { - return (Class)AccessController.doPrivileged(new PrivilegedExceptionAction(){ - public Object run() throws Exception{ - ClassLoader cl = Thread.currentThread().getContextClassLoader(); - return Class.forName(className, true, cl); - } - }); - } - catch (PrivilegedActionException pae) { - throw new RuntimeException("cannot load the class: " + className, pae.getException()); - } - } - - Object readResolve() throws ObjectStreamException { - try { - int n = interfaces.length; - Class[] infs = new Class[n]; - for (int i = 0; i < n; i++) - infs[i] = loadClass(interfaces[i]); - - ProxyFactory f = new ProxyFactory(); - f.setSuperclass(loadClass(superClass)); - f.setInterfaces(infs); - Proxy proxy = (Proxy)f.createClass(filterSignature).newInstance(); - proxy.setHandler(handler); - return proxy; - } - catch (ClassNotFoundException e) { - throw new java.io.InvalidClassException(e.getMessage()); - } - catch (InstantiationException e2) { - throw new java.io.InvalidObjectException(e2.getMessage()); - } - catch (IllegalAccessException e3) { - throw new java.io.InvalidClassException(e3.getMessage()); - } - } -} diff --git a/src/com/wenshuo/agent/javassist/util/proxy/package.html b/src/com/wenshuo/agent/javassist/util/proxy/package.html deleted file mode 100644 index 6c77804..0000000 --- a/src/com/wenshuo/agent/javassist/util/proxy/package.html +++ /dev/null @@ -1,6 +0,0 @@ - - -Dynamic proxy (similar to Enhancer of cglib). -See ProxyFactory for more details. - - diff --git a/src/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/com/wenshuo/agent/log/ExecuteLogUtils.java deleted file mode 100644 index c1f9678..0000000 --- a/src/com/wenshuo/agent/log/ExecuteLogUtils.java +++ /dev/null @@ -1,316 +0,0 @@ -/* - * @(#)ExecuteLogUtils.java 2015-7-27 下午05:57:01 javaagent Copyright 2015 wenshuo, Inc. All rights reserved. wenshuo - * PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent.log; - -import java.io.BufferedWriter; -import java.io.File; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.OutputStreamWriter; -import java.io.RandomAccessFile; -import java.text.ParseException; -import java.text.SimpleDateFormat; -import java.util.Calendar; -import java.util.Date; -import java.util.Iterator; -import java.util.Map; -import java.util.Set; -import java.util.concurrent.ConcurrentHashMap; -import java.util.concurrent.ScheduledThreadPoolExecutor; -import java.util.concurrent.TimeUnit; - -import com.wenshuo.agent.AgentUtils; -import com.wenshuo.agent.ConfigUtils; -import com.wenshuo.agent.NamedThreadFactory; - -/** - * ExecuteLogUtils - * - * @author dingjsh - * @time 2015-7-27下午05:57:01 - */ -public class ExecuteLogUtils { - - private static BufferedWriter counterLogWriter = null; - - private static long nextDayStartTimeMillis; - - private static String logFileName = null; - - private static long startTimeMillis; - - private static ScheduledThreadPoolExecutor counterLogExecutor; - - private static ConcurrentHashMap> executeCounterMap; - - private static final Object executeCounterLock = new Object(); - - private static final int BUFFER_SIZE = 256 * 1024; - - private static final String ENCODING = "UTF-8"; - - private static boolean isUsingNanoTime = false; - - private static boolean logAvgExecuteTime = false; - - private static volatile boolean isInitialized = false; - - private ExecuteLogUtils() { - super(); - } - - /** - * 初使化 - * - * @author dingjsh - * @time 2015-7-30上午10:47:58 - */ - public static synchronized void init() { - if (isInitialized) { - return; - } - logFileName = ConfigUtils.getLogFileName(); - int interval = ConfigUtils.getLogInterval(); - logAvgExecuteTime = ConfigUtils.isLogAvgExecuteTime(); - isUsingNanoTime = ConfigUtils.isUsingNanoTime(); - if (AgentUtils.isBlank(logFileName)) { - System.err.println("日志文件名为空"); - throw new RuntimeException("日志文件名为空"); - } - setNextDateStartTimeMillis(); - initWriter(); - executeCounterMap = new ConcurrentHashMap>(); - startTimeMillis = System.currentTimeMillis(); - counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); - counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); - isInitialized = true; - } - - public static void log(String className, String methodName, long executeTime) { - logExecuteCounter(className, methodName, executeTime); - } - - /** - * 输出方法执行记数日志 - * - * @author dingjsh - * @time 2015-7-28下午01:35:25 - */ - synchronized static void outputCounterLog() throws IOException { - ConcurrentHashMap> executeCounterMapInner = executeCounterMap; - executeCounterMap = new ConcurrentHashMap>(); - String startTime = formatTimeMillis(startTimeMillis); - String endTime = formatTimeMillis(System.currentTimeMillis()); - long byteLength = removeJSONArrayEndBracket(); - if (0 == byteLength) { - writeLog("[", true, startTimeMillis); - } - - Set>> entrySet = executeCounterMapInner.entrySet(); - Iterator>> ite = entrySet.iterator(); - int length = entrySet.size(); - if (length > 0 && byteLength > 10) { // 说明文件不只是[],json数组中已经有内容 - writeLog(",", startTimeMillis); - } - for (int index = 0; ite.hasNext(); index++) { - Map.Entry> entry = ite.next(); - String className = entry.getKey(); - Map method2ExecuteMap = entry.getValue(); - String methodExecuteJson = MethodExecuteJSONformatter.getMethodExecuteJSON(className, method2ExecuteMap, - startTime, endTime, isUsingNanoTime, logAvgExecuteTime); - writeLog(methodExecuteJson, startTimeMillis); - if (index < length - 1) { - writeLog(",", true, startTimeMillis); - } - } - writeLog("]", true, startTimeMillis); - flushLogAndClose(); - startTimeMillis = System.currentTimeMillis(); - } - - private static void logExecuteCounter(String className, String methodName, long executeTime) { - // dingjs modified in 20210825 原来是用锁和AtomicLong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 - // 数据有一些误差，这个误差对于agent数据监控并没有什么影响，牺牲一定的准确性带来性能的提升是有必要的 - ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); - long[] counter = methodCounterMap.get(methodName); - if (null == counter) { - methodCounterMap.put(methodName, new long[]{1, executeTime}); - } else { - counter[0]++; - counter[1] = executeTime + counter[1]; - } - } - - /** - * ExecuteLogUtils - * - * @param className 类名 - * @return class和它的调用次数映射关系 - * @description 获得class和它的调用次数映射关系，如果exeuteCounterMap中没有，则创建一个并放入 - * @author dingjsh - * @date 2018年5月25日 下午4:40:33 - * @version 1.2.0 - */ - private static ConcurrentHashMap getOrCreateClassExecutesMapping(String className) { - ConcurrentHashMap methodCounterMap = executeCounterMap.get(className); - if (null == methodCounterMap) { - synchronized (executeCounterLock) { - methodCounterMap = executeCounterMap.get(className); - if (null == methodCounterMap) { - methodCounterMap = new ConcurrentHashMap(); - executeCounterMap.put(className, methodCounterMap); - } - } - } - return methodCounterMap; - } - - private static void writeLog(String logValue, long currTimeMillis) { - writeLog(logValue, false, currTimeMillis); - } - - private static void writeLog(String logValue, boolean newLine, long currTimeMillis) { - ensureLogFileUpToDate(currTimeMillis); - try { - counterLogWriter.write(logValue); - if (newLine) { - counterLogWriter.newLine(); - } - } catch (IOException e) { - System.err.println(e); - } - - } - - private static void flushLogAndClose() { - try { - counterLogWriter.flush(); - } catch (IOException e) { - System.err.println(e); - } finally { - AgentUtils.closeQuietly(counterLogWriter); - counterLogWriter = null; - } - } - - /** - * 确保日志文件没过时,日志文件都会加上日期后缀,如果当前日志文件 - */ - private static void ensureLogFileUpToDate(long currTimeMillis) { - if (currTimeMillis >= nextDayStartTimeMillis) { - try { - if (null != counterLogWriter) { - counterLogWriter.flush(); - } - } catch (Exception e) { - System.err.println(e); - } finally { - AgentUtils.closeQuietly(counterLogWriter); - } - initWriter(); - setNextDateStartTimeMillis(); - } - if (null == counterLogWriter) { - initWriter(); - } - - } - - private static void initWriter() { - try { - File logFile = getCounterLogFile(logFileName); - counterLogWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(logFile, true), ENCODING), - BUFFER_SIZE); - } catch (IOException e) { - System.err.println(e); - throw new RuntimeException("无法初始化【" + logFileName + "】,建议您检查磁盘空间，或者手动删除该日志文件"); - } - } - - private static File getCounterLogFile(String logFileName) throws IOException { - - String logFileNameWithDate = getCurrDateString(); - int lastIndexOfDot = logFileName.lastIndexOf('.'); - if (lastIndexOfDot > 0) { - logFileName = logFileName.substring(0, lastIndexOfDot) + "." + logFileNameWithDate - + logFileName.substring(lastIndexOfDot); - } else { - logFileName = logFileName + "." + logFileNameWithDate + ".log"; - } - File logFile = getLogFile(logFileName); - return logFile; - } - - private static File getLogFile(String logFileName) throws IOException { - File logFile = new File(logFileName); - if (logFile.isDirectory()) { - System.err.println("【" + logFileName + "】是文件夹"); - throw new RuntimeException("【" + logFileName + "】是文件夹"); - } else if (!logFile.exists()) { - // dingjs modified in 20140513 - File dirFile = logFile.getParentFile(); - AgentUtils.forceMkdir(dirFile); - boolean created = logFile.createNewFile(); - if (!created) { - System.err.println("【" + logFileName + "】创建失败"); - throw new RuntimeException("【" + logFileName + "】创建失败"); - } - } - return logFile; - } - - private static String getCurrDateString() { - Date today = new Date(); - return new SimpleDateFormat("yyyy-MM-dd").format(today); - } - - /** - * 由开始日期转换为开始时间，一般在以时间为条件的查询中使用 - */ - private static Date date2StartTime(Date date) { - SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); - String dateStr = sdf.format(date); - Date startTime = null; - try { - startTime = sdf.parse(dateStr + " 00:00:00"); - } catch (ParseException e) { - System.err.println(e); - } - return startTime; - } - - /** - * 设置下一天的开始时间 - */ - private static void setNextDateStartTimeMillis() { - Date currDate = new Date(); - Calendar cal = Calendar.getInstance(); - cal.setTime(currDate); - cal.add(Calendar.DATE, 1); - Date startTime = date2StartTime(cal.getTime()); - nextDayStartTimeMillis = startTime.getTime(); - } - - private static String formatTimeMillis(long timeMillis) { - Date date = new Date(timeMillis); - SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); - return sdf.format(date); - } - - private static long removeJSONArrayEndBracket() throws IOException { - File logFile = getCounterLogFile(logFileName); - RandomAccessFile f = new RandomAccessFile(logFile.getAbsolutePath(), "rw"); - long length = f.length(); - byte b = -1; - while (b != 93 && length > 0) { - length -= 1; - f.seek(length); - b = f.readByte(); - } - f.setLength(length); - f.close(); - return length; - } -} \ No newline at end of file diff --git a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java deleted file mode 100644 index 13e1454..0000000 --- a/src/com/wenshuo/agent/log/MethodExecuteJSONformatter.java +++ /dev/null @@ -1,70 +0,0 @@ -package com.wenshuo.agent.log; - -import java.util.Map; - - -/** - * MethodExecuteJSONformatter - * - * @author dingjsh - * @version 2.0.0 - * @description 2.0.0 - * @date 2018年8月22日 下午8:07:01 - */ -class MethodExecuteJSONformatter { - - /** - * MethodExecuteJSONformatter - * - * @param className 类名 - * @param method2ExecuteMap Map<方法名, Long[]> 数组第一个是执行次数，第二个是执行时间 - * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss - * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss - * @return 格式化后的json string - * @description 将方法执行监控数据格式化为json string - * @author dingjsh - * @date 2018年8月22日 下午8:49:18 - * @version 2.0.0 - */ - static String getMethodExecuteJSON(String className, Map method2ExecuteMap, - String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { - StringBuilder json = new StringBuilder("{"); - appendString(json, "class", className).append(","); - appendString(json, "start", startTime).append(","); - appendString(json, "end", endTime).append(","); - appendKey(json, "methods").append("["); - for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { - String methodName = methodEntry.getKey(); - long[] executeCounter = methodEntry.getValue(); - long counter = executeCounter[0]; - long timeInMillis - = isUsingNanoTime ? executeCounter[1] / 1000000 : executeCounter[1]; - json.append("{"); - appendString(json, "name", methodName).append(","); - appendLong(json, "counter", counter).append(","); - appendLong(json, "time", timeInMillis); - if (logAvgExecuteTime && counter > 0) { - json.append(","); - appendLong(json, "avg", timeInMillis / counter); - } - json.append("},"); - } - if (json.charAt(json.length() - 1) == ',') { - json.deleteCharAt(json.length() - 1); - } - json.append("]}"); - return json.toString(); - } - - private static StringBuilder appendString(StringBuilder jsonBuilder, String key, String value) { - return appendKey(jsonBuilder, key).append("\"").append(value).append("\""); - } - - private static StringBuilder appendLong(StringBuilder jsonBuilder, String key, long value) { - return appendKey(jsonBuilder, key).append(value); - } - - private static StringBuilder appendKey(StringBuilder jsonBuilder, String key) { - return jsonBuilder.append("\"").append(key).append("\":"); - } -} diff --git a/src/com/wenshuo/agent/log/OutputLogRunnable.java b/src/com/wenshuo/agent/log/OutputLogRunnable.java deleted file mode 100644 index 3a08620..0000000 --- a/src/com/wenshuo/agent/log/OutputLogRunnable.java +++ /dev/null @@ -1,31 +0,0 @@ -/* - * @(#)OutputLogRunnable.java 2015-7-28 下午03:27:20 - * javaagent - * Copyright 2015 wenshuo, Inc. All rights reserved. - * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. - */ -package com.wenshuo.agent.log; - -/** - * OutputLogRunnable - * - * @author dingjsh - * @time 2015-7-28下午03:27:20 - */ -public class OutputLogRunnable implements Runnable { - - /* - * (non-Javadoc) - * - * @see java.lang.Runnable#run() - */ - @Override - public void run() { - try{ - ExecuteLogUtils.outputCounterLog(); - }catch(Exception e){ - System.err.println(e); - } - } - -} diff --git a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java deleted file mode 100644 index 6343783..0000000 --- a/src/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ /dev/null @@ -1,156 +0,0 @@ -package com.wenshuo.agent.transformer; - -import com.wenshuo.agent.ConfigUtils; -import com.wenshuo.agent.PojoDetector; -import com.wenshuo.agent.javassist.CannotCompileException; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.LoaderClassPath; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; -import java.io.IOException; -import java.lang.instrument.ClassFileTransformer; -import java.security.ProtectionDomain; -import java.util.Collections; -import java.util.Set; -import java.util.regex.Pattern; - -/** - * AgentLogClassFileTransformer 类增强，增加agent日志 - * - * @author dingjsh - * @time 2015-7-24上午09:53:44 - */ -public class AgentLogClassFileTransformer implements ClassFileTransformer { - - private static final String LOG_UTILS = "com.wenshuo.agent.log.ExecuteLogUtils"; - - private static final String AGENT_PACKAGE_NAME = "com.wenshuo.agent"; - - - @Override - public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, - ProtectionDomain protectionDomain, byte[] classfileBuffer) { - byte[] byteCode = classfileBuffer; - className = className.replace('/', '.'); - if (!isNeedLogExecuteInfo(className)) { - return byteCode; - } - if (null == loader) { - loader = Thread.currentThread().getContextClassLoader(); - } - byteCode = aopLog(loader, className, byteCode); - return byteCode; - } - - private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { - try { - ClassPool cp = ClassPool.getDefault(); - CtClass cc; - try { - cc = cp.get(className); - } catch (NotFoundException e) { - cp.insertClassPath(new LoaderClassPath(loader)); - cc = cp.get(className); - } - byteCode = aopLog(cc, className, byteCode); - } catch (Exception ex) { - System.err.println(ex); - } - return byteCode; - } - - private byte[] aopLog(CtClass cc, String className, byte[] byteCode) throws CannotCompileException, IOException { - if (null == cc) { - return byteCode; - } - if (!cc.isInterface()) { - CtMethod[] methods = cc.getDeclaredMethods(); - if (null != methods && methods.length > 0) { - boolean isOpenPojoMonitor = ConfigUtils.isOpenPojoMonitor(); - Set getSetMethods = Collections.emptySet(); - if (!isOpenPojoMonitor) { - getSetMethods = PojoDetector.getPojoMethodNames(methods); - } - for (CtMethod m : methods) { - if (isOpenPojoMonitor || !getSetMethods.contains(m.getName())) { - aopLog(className, m); - } - } - byteCode = cc.toBytecode(); - } - } - cc.detach(); - return byteCode; - } - - private void aopLog(String className, CtMethod m) throws CannotCompileException { - if (null == m || m.isEmpty()) { - return; - } - boolean isMethodStatic = Modifier.isStatic(m.getModifiers()); - String aopClassName = isMethodStatic ? "\"" + className + "\"" : "this.getClass().getName()"; - final String timeMethodStr - = ConfigUtils.isUsingNanoTime() ? "java.lang.System.nanoTime()" : "java.lang.System.currentTimeMillis()"; - - // 避免变量名重复 - m.addLocalVariable("dingjsh_javaagent_elapsedTime", CtClass.longType); - m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); - m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;"); - m.insertAfter(LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() - + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); - } - - /** - * 是否需要记录执行信息 - * - * @param className 类名 - * @return 是否需要记录执行信息 - * @author dingjsh - * @time 2015-7-27下午06:11:02 - */ - private boolean isNeedLogExecuteInfo(String className) { - // do not transform the agent class,prevent deadlock - if (className.startsWith(AGENT_PACKAGE_NAME)) { - return false; - } - Set includes = ConfigUtils.getIncludePackages(); - if (null == includes || includes.isEmpty()) { - return false; - } - - boolean isNeeded = false; - // include package - for (String packageName : includes) { - if (className.startsWith(packageName)) { - isNeeded = true; - break; - } - } - // exclude package - if (isNeeded) { - Set excludes = ConfigUtils.getExcludePackages(); - if (null != excludes && !excludes.isEmpty()) { - for (String packageName : excludes) { - if (className.startsWith(packageName)) { - isNeeded = false; - break; - } - } - } - } - if (isNeeded) { - Set excludeClassRegexs = ConfigUtils.getExcludeClassRegexs(); - if (null != excludeClassRegexs && !excludeClassRegexs.isEmpty()) { - for (String regex : excludeClassRegexs) { - isNeeded = !Pattern.matches(regex, className); - if (!isNeeded) { - break; - } - } - } - } - return isNeeded; - } -} diff --git a/src/props/agent.properties b/src/props/agent.properties deleted file mode 100644 index 7d62605..0000000 --- a/src/props/agent.properties +++ /dev/null @@ -1,16 +0,0 @@ -#\u9700\u8981\u76d1\u63a7\u7684\u5305\uff0c\u591a\u4e2a\u5305\u7528\u5206\u53f7\u5206\u9694 -agent.include.package=com.XXX -#\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u5305\uff0c\u591a\u4e2a\u5305\u7528\u5206\u53f7\u5206\u9694\u3002 \u9700\u8981\u76d1\u63a7\u7684\u5305-\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u5305\u5c31\u662f\u771f\u6b63\u8981\u76d1\u63a7\u7684\u5305 -agent.exclude.package= -#\u65e5\u5fd7\u6587\u4ef6\uff0c\u4f1a\u81ea\u52a8\u589e\u52a0\u65e5\u671f\u540e\u7f00 -agent.log.file=d\:\\agent.log -#\u65e5\u5fd7\u8f93\u51fa\u5468\u671f -agent.log.interval.seconds=600 -#\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u7c7b\u7684\u6b63\u5219\u8868\u8fbe\u5f0f -agent.exclude.class.regex= -#\u662f\u5426\u8bb0\u5f55\u5e73\u5747\u65f6\u95f4 -agent.log.avg.execute.time=false -#\u9ed8\u8ba4\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u7c7b\u7684\u6b63\u5219\u8868\u8fbe\u5f0f -agent.exclude.class.regex.default=.*EnhancerByCGLIB.*;.*FastClassByCGLIB.* -#\u8bb0\u5f55\u65b9\u6cd5\u7684\u8017\u65f6\u65f6\u662f\u91c7\u7528nanoTime,\u8fd8\u662fcurrentTimeMillis,nanoTime\u66f4\u51c6\u786e\uff0c\u4f46\u662f\u4f1a\u8017\u65f6\u4e00\u4e9b -agent.log.nano=true diff --git a/test/com/wenshuo/agent/test/TestCtMethod.java b/test/com/wenshuo/agent/test/TestCtMethod.java deleted file mode 100644 index ecca591..0000000 --- a/test/com/wenshuo/agent/test/TestCtMethod.java +++ /dev/null @@ -1,50 +0,0 @@ -package com.wenshuo.agent.test; - -import java.util.Arrays; -import java.util.List; - -import org.junit.Assert; -import org.junit.Test; - -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; - -public class TestCtMethod { - - private static List staticMethodNames = Arrays.asList("privateStatic","protectedStatic","publicStatic","defaultStatic"); - - @Test - public void staticMethodTest() throws NotFoundException{ - ClassPool cp = ClassPool.getDefault(); - CtClass ctClass = cp.get("com.wenshuo.agent.test.TestCtMethod"); - CtMethod[] ctMethods = ctClass.getDeclaredMethods(); - for(CtMethod ctMethod : ctMethods){ - String methodName = ctMethod.getName(); - if(staticMethodNames.contains(methodName)){ - Assert.assertTrue(methodName+" is static method", Modifier.isStatic(ctMethod.getModifiers())); - } - } - System.out.println("staticMethodTest is successful"); - } - - private static void privateStatic(){ - System.out.println("I'm private and static"); - } - - protected static void protectedStatic(){ - System.out.println("I'm private and static"); - } - - public static void publicStatic(){ - System.out.println("I'm public and static"); - } - static void defaultStatic(){ - System.out.println("I'm default and static"); - } - - - -} From 30b3680be799a3ba7d3e4c10b8ca3251813a447c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Mon, 16 Oct 2023 10:48:22 +0800 Subject: [PATCH 16/25] =?UTF-8?q?=E4=BF=AE=E6=94=B9javaagent=E5=8C=85?= =?UTF-8?q?=E7=BB=93=E6=9E=84=E4=B8=BAjava=E9=A1=B9=E7=9B=AE=E9=BB=98?= =?UTF-8?q?=E8=AE=A4=E5=8C=85=E7=BB=93=E6=9E=84?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/main/java/com/wenshuo/agent/Agent.java | 27 + .../java/com/wenshuo/agent/AgentUtils.java | 180 ++ .../java/com/wenshuo/agent/ConfigConsts.java | 39 + .../java/com/wenshuo/agent/ConfigUtils.java | 161 ++ .../com/wenshuo/agent/NamedThreadFactory.java | 35 + .../java/com/wenshuo/agent/PojoDetector.java | 65 + .../agent/javassist/ByteArrayClassPath.java | 99 + .../javassist/CannotCompileException.java | 120 + .../agent/javassist/ClassClassPath.java | 97 + .../com/wenshuo/agent/javassist/ClassMap.java | 173 ++ .../wenshuo/agent/javassist/ClassPath.java | 68 + .../wenshuo/agent/javassist/ClassPool.java | 1233 ++++++++++ .../agent/javassist/ClassPoolTail.java | 430 ++++ .../agent/javassist/CodeConverter.java | 809 +++++++ .../com/wenshuo/agent/javassist/CtArray.java | 113 + .../wenshuo/agent/javassist/CtBehavior.java | 1219 ++++++++++ .../com/wenshuo/agent/javassist/CtClass.java | 1595 +++++++++++++ .../wenshuo/agent/javassist/CtClassType.java | 1761 +++++++++++++++ .../agent/javassist/CtConstructor.java | 403 ++++ .../com/wenshuo/agent/javassist/CtField.java | 1406 ++++++++++++ .../com/wenshuo/agent/javassist/CtMember.java | 319 +++ .../com/wenshuo/agent/javassist/CtMethod.java | 438 ++++ .../wenshuo/agent/javassist/CtNewClass.java | 126 ++ .../agent/javassist/CtNewConstructor.java | 319 +++ .../wenshuo/agent/javassist/CtNewMethod.java | 478 ++++ .../agent/javassist/CtNewNestedClass.java | 67 + .../javassist/CtNewWrappedConstructor.java | 103 + .../agent/javassist/CtNewWrappedMethod.java | 199 ++ .../agent/javassist/CtPrimitiveType.java | 112 + .../com/wenshuo/agent/javassist/Loader.java | 430 ++++ .../agent/javassist/LoaderClassPath.java | 96 + .../com/wenshuo/agent/javassist/Modifier.java | 219 ++ .../agent/javassist/NotFoundException.java | 30 + .../agent/javassist/SerialVersionUID.java | 213 ++ .../wenshuo/agent/javassist/Translator.java | 71 + .../wenshuo/agent/javassist/URLClassPath.java | 179 ++ .../agent/javassist/bytecode/AccessFlag.java | 134 ++ .../bytecode/AnnotationDefaultAttribute.java | 160 ++ .../bytecode/AnnotationsAttribute.java | 732 ++++++ .../javassist/bytecode/AttributeInfo.java | 303 +++ .../agent/javassist/bytecode/BadBytecode.java | 40 + .../bytecode/BootstrapMethodsAttribute.java | 123 + .../agent/javassist/bytecode/ByteArray.java | 77 + .../agent/javassist/bytecode/ByteStream.java | 194 ++ .../agent/javassist/bytecode/Bytecode.java | 1459 ++++++++++++ .../agent/javassist/bytecode/ClassFile.java | 932 ++++++++ .../javassist/bytecode/ClassFilePrinter.java | 153 ++ .../javassist/bytecode/ClassFileWriter.java | 791 +++++++ .../javassist/bytecode/CodeAnalyzer.java | 267 +++ .../javassist/bytecode/CodeAttribute.java | 595 +++++ .../javassist/bytecode/CodeIterator.java | 1604 +++++++++++++ .../agent/javassist/bytecode/ConstPool.java | 1995 +++++++++++++++++ .../javassist/bytecode/ConstantAttribute.java | 73 + .../bytecode/DeprecatedAttribute.java | 56 + .../agent/javassist/bytecode/Descriptor.java | 872 +++++++ .../bytecode/DuplicateMemberException.java | 31 + .../bytecode/EnclosingMethodAttribute.java | 142 ++ .../javassist/bytecode/ExceptionTable.java | 281 +++ .../bytecode/ExceptionsAttribute.java | 174 ++ .../agent/javassist/bytecode/FieldInfo.java | 276 +++ .../bytecode/InnerClassesAttribute.java | 242 ++ .../bytecode/InstructionPrinter.java | 295 +++ .../bytecode/LineNumberAttribute.java | 182 ++ .../bytecode/LocalVariableAttribute.java | 334 +++ .../bytecode/LocalVariableTypeAttribute.java | 63 + .../agent/javassist/bytecode/LongVector.java | 64 + .../agent/javassist/bytecode/MethodInfo.java | 566 +++++ .../bytecode/MethodParametersAttribute.java | 87 + .../agent/javassist/bytecode/Mnemonic.java | 239 ++ .../agent/javassist/bytecode/Opcode.java | 449 ++++ .../ParameterAnnotationsAttribute.java | 215 ++ .../bytecode/SignatureAttribute.java | 1160 ++++++++++ .../bytecode/SourceFileAttribute.java | 71 + .../agent/javassist/bytecode/StackMap.java | 576 +++++ .../javassist/bytecode/StackMapTable.java | 1049 +++++++++ .../bytecode/SyntheticAttribute.java | 56 + .../bytecode/TypeAnnotationsAttribute.java | 360 +++ .../javassist/bytecode/analysis/Analyzer.java | 423 ++++ .../bytecode/analysis/ControlFlow.java | 504 +++++ .../javassist/bytecode/analysis/Executor.java | 1047 +++++++++ .../javassist/bytecode/analysis/Frame.java | 289 +++ .../bytecode/analysis/FramePrinter.java | 148 ++ .../javassist/bytecode/analysis/IntQueue.java | 57 + .../bytecode/analysis/MultiArrayType.java | 130 ++ .../bytecode/analysis/MultiType.java | 314 +++ .../bytecode/analysis/Subroutine.java | 67 + .../bytecode/analysis/SubroutineScanner.java | 157 ++ .../javassist/bytecode/analysis/Type.java | 593 +++++ .../javassist/bytecode/analysis/Util.java | 48 + .../javassist/bytecode/analysis/package.html | 20 + .../bytecode/annotation/Annotation.java | 348 +++ .../bytecode/annotation/AnnotationImpl.java | 305 +++ .../annotation/AnnotationMemberValue.java | 96 + .../annotation/AnnotationsWriter.java | 354 +++ .../bytecode/annotation/ArrayMemberValue.java | 145 ++ .../annotation/BooleanMemberValue.java | 103 + .../bytecode/annotation/ByteMemberValue.java | 103 + .../bytecode/annotation/CharMemberValue.java | 104 + .../bytecode/annotation/ClassMemberValue.java | 140 ++ .../annotation/DoubleMemberValue.java | 105 + .../bytecode/annotation/EnumMemberValue.java | 126 ++ .../bytecode/annotation/FloatMemberValue.java | 105 + .../annotation/IntegerMemberValue.java | 110 + .../bytecode/annotation/LongMemberValue.java | 104 + .../bytecode/annotation/MemberValue.java | 89 + .../annotation/MemberValueVisitor.java | 39 + .../bytecode/annotation/NoSuchClassError.java | 40 + .../bytecode/annotation/ShortMemberValue.java | 104 + .../annotation/StringMemberValue.java | 104 + .../annotation/TypeAnnotationsWriter.java | 174 ++ .../bytecode/annotation/package.html | 8 + .../agent/javassist/bytecode/package.html | 18 + .../bytecode/stackmap/BasicBlock.java | 411 ++++ .../javassist/bytecode/stackmap/MapMaker.java | 606 +++++ .../javassist/bytecode/stackmap/Tracer.java | 933 ++++++++ .../javassist/bytecode/stackmap/TypeData.java | 785 +++++++ .../javassist/bytecode/stackmap/TypeTag.java | 30 + .../bytecode/stackmap/TypedBlock.java | 234 ++ .../javassist/compiler/AccessorMaker.java | 260 +++ .../agent/javassist/compiler/CodeGen.java | 1955 ++++++++++++++++ .../javassist/compiler/CompileError.java | 53 + .../agent/javassist/compiler/Javac.java | 610 +++++ .../agent/javassist/compiler/JvstCodeGen.java | 710 ++++++ .../javassist/compiler/JvstTypeChecker.java | 282 +++ .../javassist/compiler/KeywordTable.java | 33 + .../wenshuo/agent/javassist/compiler/Lex.java | 551 +++++ .../javassist/compiler/MemberCodeGen.java | 1160 ++++++++++ .../javassist/compiler/MemberResolver.java | 617 +++++ .../javassist/compiler/NoFieldException.java | 40 + .../agent/javassist/compiler/Parser.java | 1345 +++++++++++ .../javassist/compiler/ProceedHandler.java | 30 + .../agent/javassist/compiler/SymbolTable.java | 45 + .../agent/javassist/compiler/SyntaxError.java | 23 + .../agent/javassist/compiler/TokenId.java | 125 ++ .../agent/javassist/compiler/TypeChecker.java | 1044 +++++++++ .../agent/javassist/compiler/ast/ASTList.java | 160 ++ .../agent/javassist/compiler/ast/ASTree.java | 59 + .../javassist/compiler/ast/ArrayInit.java | 32 + .../javassist/compiler/ast/AssignExpr.java | 41 + .../agent/javassist/compiler/ast/BinExpr.java | 42 + .../javassist/compiler/ast/CallExpr.java | 47 + .../javassist/compiler/ast/CastExpr.java | 56 + .../javassist/compiler/ast/CondExpr.java | 44 + .../javassist/compiler/ast/Declarator.java | 128 ++ .../javassist/compiler/ast/DoubleConst.java | 95 + .../agent/javassist/compiler/ast/Expr.java | 85 + .../javassist/compiler/ast/FieldDecl.java | 35 + .../compiler/ast/InstanceOfExpr.java | 40 + .../javassist/compiler/ast/IntConst.java | 139 ++ .../agent/javassist/compiler/ast/Keyword.java | 36 + .../agent/javassist/compiler/ast/Member.java | 40 + .../javassist/compiler/ast/MethodDecl.java | 46 + .../agent/javassist/compiler/ast/NewExpr.java | 78 + .../agent/javassist/compiler/ast/Pair.java | 52 + .../agent/javassist/compiler/ast/Stmnt.java | 60 + .../agent/javassist/compiler/ast/StringL.java | 36 + .../agent/javassist/compiler/ast/Symbol.java | 36 + .../javassist/compiler/ast/Variable.java | 39 + .../agent/javassist/compiler/ast/Visitor.java | 52 + .../convert/TransformAccessArrayField.java | 270 +++ .../javassist/convert/TransformAfter.java | 47 + .../javassist/convert/TransformBefore.java | 108 + .../javassist/convert/TransformCall.java | 130 ++ .../convert/TransformFieldAccess.java | 82 + .../agent/javassist/convert/TransformNew.java | 103 + .../javassist/convert/TransformNewClass.java | 83 + .../javassist/convert/TransformReadField.java | 96 + .../convert/TransformWriteField.java | 72 + .../agent/javassist/convert/Transformer.java | 57 + .../wenshuo/agent/javassist/expr/Cast.java | 166 ++ .../agent/javassist/expr/ConstructorCall.java | 70 + .../wenshuo/agent/javassist/expr/Expr.java | 330 +++ .../agent/javassist/expr/ExprEditor.java | 317 +++ .../agent/javassist/expr/FieldAccess.java | 325 +++ .../wenshuo/agent/javassist/expr/Handler.java | 146 ++ .../agent/javassist/expr/Instanceof.java | 170 ++ .../agent/javassist/expr/MethodCall.java | 247 ++ .../agent/javassist/expr/NewArray.java | 283 +++ .../wenshuo/agent/javassist/expr/NewExpr.java | 249 ++ .../wenshuo/agent/javassist/expr/package.html | 8 + .../com/wenshuo/agent/javassist/package.html | 22 + .../agent/javassist/runtime/Cflow.java | 53 + .../wenshuo/agent/javassist/runtime/Desc.java | 161 ++ .../agent/javassist/runtime/DotClass.java | 29 + .../agent/javassist/runtime/Inner.java | 25 + .../agent/javassist/runtime/package.html | 12 + .../javassist/scopedpool/ScopedClassPool.java | 309 +++ .../scopedpool/ScopedClassPoolFactory.java | 39 + .../ScopedClassPoolFactoryImpl.java | 43 + .../scopedpool/ScopedClassPoolRepository.java | 98 + .../ScopedClassPoolRepositoryImpl.java | 188 ++ .../scopedpool/SoftValueHashMap.java | 233 ++ .../agent/javassist/scopedpool/package.html | 7 + .../agent/javassist/tools/Callback.java | 152 ++ .../wenshuo/agent/javassist/tools/Dump.java | 58 + .../agent/javassist/tools/framedump.java | 48 + .../agent/javassist/tools/package.html | 6 + .../tools/reflect/CannotCreateException.java | 30 + .../tools/reflect/CannotInvokeException.java | 69 + .../tools/reflect/CannotReflectException.java | 35 + .../tools/reflect/ClassMetaobject.java | 370 +++ .../javassist/tools/reflect/Compiler.java | 163 ++ .../agent/javassist/tools/reflect/Loader.java | 162 ++ .../javassist/tools/reflect/Metalevel.java | 39 + .../javassist/tools/reflect/Metaobject.java | 239 ++ .../javassist/tools/reflect/Reflection.java | 403 ++++ .../agent/javassist/tools/reflect/Sample.java | 57 + .../javassist/tools/reflect/package.html | 35 + .../javassist/tools/rmi/AppletServer.java | 251 +++ .../javassist/tools/rmi/ObjectImporter.java | 299 +++ .../tools/rmi/ObjectNotFoundException.java | 27 + .../agent/javassist/tools/rmi/Proxy.java | 26 + .../javassist/tools/rmi/RemoteException.java | 31 + .../agent/javassist/tools/rmi/RemoteRef.java | 36 + .../agent/javassist/tools/rmi/Sample.java | 37 + .../javassist/tools/rmi/StubGenerator.java | 256 +++ .../agent/javassist/tools/rmi/package.html | 16 + .../javassist/tools/web/BadHttpRequest.java | 35 + .../agent/javassist/tools/web/Viewer.java | 209 ++ .../agent/javassist/tools/web/Webserver.java | 408 ++++ .../agent/javassist/tools/web/package.html | 7 + .../agent/javassist/util/HotSwapper.java | 251 +++ .../wenshuo/agent/javassist/util/package.html | 5 + .../javassist/util/proxy/FactoryHelper.java | 237 ++ .../javassist/util/proxy/MethodFilter.java | 31 + .../javassist/util/proxy/MethodHandler.java | 49 + .../agent/javassist/util/proxy/Proxy.java | 33 + .../javassist/util/proxy/ProxyFactory.java | 1446 ++++++++++++ .../javassist/util/proxy/ProxyObject.java | 44 + .../util/proxy/ProxyObjectInputStream.java | 100 + .../util/proxy/ProxyObjectOutputStream.java | 72 + .../javassist/util/proxy/RuntimeSupport.java | 271 +++ .../javassist/util/proxy/SecurityActions.java | 136 ++ .../javassist/util/proxy/SerializedProxy.java | 99 + .../agent/javassist/util/proxy/package.html | 6 + .../wenshuo/agent/log/ExecuteLogUtils.java | 316 +++ .../agent/log/MethodExecuteJSONformatter.java | 70 + .../wenshuo/agent/log/OutputLogRunnable.java | 31 + .../AgentLogClassFileTransformer.java | 155 ++ src/main/resources/agent.properties | 16 + .../com/wenshuo/agent/test/TestCtMethod.java | 50 + 241 files changed, 62385 insertions(+) create mode 100644 src/main/java/com/wenshuo/agent/Agent.java create mode 100644 src/main/java/com/wenshuo/agent/AgentUtils.java create mode 100644 src/main/java/com/wenshuo/agent/ConfigConsts.java create mode 100644 src/main/java/com/wenshuo/agent/ConfigUtils.java create mode 100644 src/main/java/com/wenshuo/agent/NamedThreadFactory.java create mode 100644 src/main/java/com/wenshuo/agent/PojoDetector.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ClassMap.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ClassPath.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ClassPool.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CodeConverter.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtArray.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtBehavior.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtClass.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtClassType.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtConstructor.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtField.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtMember.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtMethod.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewClass.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/Loader.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/Modifier.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/NotFoundException.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/Translator.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/URLClassPath.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java create mode 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src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java create mode 100644 src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html create mode 100644 src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java create mode 100644 src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java create mode 100644 src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java create mode 100644 src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java create mode 100644 src/main/resources/agent.properties create mode 100644 src/test/java/com/wenshuo/agent/test/TestCtMethod.java diff --git a/src/main/java/com/wenshuo/agent/Agent.java b/src/main/java/com/wenshuo/agent/Agent.java new file mode 100644 index 0000000..c32f651 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/Agent.java @@ -0,0 +1,27 @@ +/* + * @(#)Agent.java 2015-7-24 上午09:49:34 + * javaagent + * Copyright 2015 wenshuo, Inc. All rights reserved. + * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent; +import java.lang.instrument.Instrumentation; +import com.wenshuo.agent.log.ExecuteLogUtils; +import com.wenshuo.agent.transformer.AgentLogClassFileTransformer; + +/** + * Agent + * + * @author dingjsh + */ +public class Agent { + + public static void premain(String agentArs, Instrumentation inst) { + System.out.println("javaagent启动成功，将自动记录方法的执行次数和时间"); + // 初始化配置 + ConfigUtils.initProperties(agentArs); + ExecuteLogUtils.init(); + inst.addTransformer(new AgentLogClassFileTransformer()); + } + +} diff --git a/src/main/java/com/wenshuo/agent/AgentUtils.java b/src/main/java/com/wenshuo/agent/AgentUtils.java new file mode 100644 index 0000000..e133898 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/AgentUtils.java @@ -0,0 +1,180 @@ +/* + * @(#)AgentUtils.java 2015-7-27 下午05:26:24 + * javaagent + * Copyright 2015 wenshuo, Inc. All rights reserved. + * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent; + +import java.io.ByteArrayOutputStream; +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.io.Writer; + +/** + * AgentUtils + * + * @author dingjsh + * @time 2015-7-27下午05:26:24 + */ +public class AgentUtils { + + /** + *

+ * Checks if a String is whitespace, empty ("") or null. + *

+ * + * 
+     * StringUtils.isBlank(null)      = true
+     * StringUtils.isBlank("")        = true
+     * StringUtils.isBlank(" ")       = true
+     * StringUtils.isBlank("bob")     = false
+     * StringUtils.isBlank("  bob  ") = false
+     *
+ * + * @param str the String to check, may be null + * @return true if the String is null, empty or whitespace + * @since 2.0 + */ + public static boolean isBlank(String str) { + int strLen; + if (str == null || (strLen = str.length()) == 0) { + return true; + } + for (int i = 0; i < strLen; i++) { + if (!Character.isWhitespace(str.charAt(i))) { + return false; + } + } + return true; + } + + /** + *

+ * Checks if a String is not empty (""), not null and not whitespace only. + *

+ * + * 
+     * StringUtils.isNotBlank(null)      = false
+     * StringUtils.isNotBlank("")        = false
+     * StringUtils.isNotBlank(" ")       = false
+     * StringUtils.isNotBlank("bob")     = true
+     * StringUtils.isNotBlank("  bob  ") = true
+     *
+ * + * @param str the String to check, may be null + * @return true if the String is not empty and not null and not + * whitespace + * @since 2.0 + */ + static boolean isNotBlank(String str) { + return !isBlank(str); + } + + /** + * Unconditionally close an InputStream. + *

+ * Equivalent to {@link InputStream#close()}, except any exceptions will be + * ignored. This is typically used in finally blocks. + * + * @param input the InputStream to close, may be null or already closed + */ + static void closeQuietly(InputStream input) { + try { + if (input != null) { + input.close(); + } + } catch (IOException ioe) { + // ignore + } + } + + public static int copy(InputStream input, OutputStream output) + throws IOException { + long count = copyLarge(input, output); + if (count > Integer.MAX_VALUE) { + return -1; + } + return (int) count; + } + + private static long copyLarge(InputStream input, OutputStream output) + throws IOException { + byte[] buffer = new byte[4096]; + long count = 0; + int n; + while (-1 != (n = input.read(buffer))) { + output.write(buffer, 0, n); + count += n; + } + return count; + } + + // read toByteArray + //----------------------------------------------------------------------- + + /** + * Get the contents of an InputStream as a byte[]. + *

+ * This method buffers the input internally, so there is no need to use a + * BufferedInputStream. + * + * @param input the InputStream to read from + * @return the requested byte array + * @throws NullPointerException if the input is null + * @throws IOException if an I/O error occurs + */ + public static byte[] toByteArray(InputStream input) throws IOException { + ByteArrayOutputStream output = new ByteArrayOutputStream(); + copy(input, output); + return output.toByteArray(); + } + + /** + * Unconditionally close a Writer. + *

+ * Equivalent to {@link Writer#close()}, except any exceptions will be ignored. + * This is typically used in finally blocks. + * + * @param output the Writer to close, may be null or already closed + */ + public static void closeQuietly(Writer output) { + try { + if (output != null) { + output.close(); + } + } catch (IOException ioe) { + // ignore + } + } + + /** + * Makes a directory, including any necessary but nonexistent parent + * directories. If there already exists a file with specified name or + * the directory cannot be created then an exception is thrown. + * + * @param directory directory to create, must not be null + * @throws NullPointerException if the directory is null + * @throws IOException if the directory cannot be created + */ + public static void forceMkdir(File directory) throws IOException { + if (directory.exists()) { + if (directory.isFile()) { + String message = + "File " + + directory + + " exists and is " + + "not a directory. Unable to create directory."; + throw new IOException(message); + } + } else { + if (!directory.mkdirs()) { + String message = + "Unable to create directory " + directory; + throw new IOException(message); + } + } + } +} diff --git a/src/main/java/com/wenshuo/agent/ConfigConsts.java b/src/main/java/com/wenshuo/agent/ConfigConsts.java new file mode 100644 index 0000000..6edd2c4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/ConfigConsts.java @@ -0,0 +1,39 @@ +/* + * @(#)ConfigConsts.java 2015-7-27 下午06:06:23 + * javaagent + * Copyright 2015 wenshuo, Inc. All rights reserved. + * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent; + +/** + * ConfigConsts + * + * @author dingjsh + * @time 2015-7-27下午06:06:23 + */ +public interface ConfigConsts { + + String EXCLUDE_PACKAGE_DEFAULT = "agent.exclude.package.default"; + + String EXCLUDE_PACKAGE = "agent.exclude.package"; + + String INCLUDE_PACKAGE = "agent.include.package"; + + String LOG_FILE = "agent.log.file"; + + String LOG_INTERVAL_SECONDS = "agent.log.interval.seconds"; + + String EXCLUDE_CLASS_REGEX = "agent.exclude.class.regex"; + + String EXCLUDE_CLASS_REGEX_DEFAULT = "agent.exclude.class.regex.default"; + + String LOG_AVG_EXECUTE_TIME = "agent.log.avg.execute.time"; + + String POJO_MONITOR_OPEN = "agent.pojo.monitor.open"; + + String LOG_TIME_NANO = "agent.log.nano"; + + int DEFAULT_LOG_INTERVAL = 600; + +} diff --git a/src/main/java/com/wenshuo/agent/ConfigUtils.java b/src/main/java/com/wenshuo/agent/ConfigUtils.java new file mode 100644 index 0000000..400a9be --- /dev/null +++ b/src/main/java/com/wenshuo/agent/ConfigUtils.java @@ -0,0 +1,161 @@ +package com.wenshuo.agent; + +import java.io.FileInputStream; +import java.io.InputStream; +import java.util.Arrays; +import java.util.HashSet; +import java.util.Properties; +import java.util.Set; + +/** + * 获取配置信息
+ * ConfigUtils + * + * @author dingjsh + * @time 2015-7-27下午09:16:18 + */ +public class ConfigUtils { + + private static Properties props; + + private static Set excludePackages; + + private static Set includePackages; + + private static Set excludeClassRegexs; + + private ConfigUtils() { + super(); + } + + static void initProperties(String propertiesFileName) { + props = getProperties(propertiesFileName); + initExcludePackages(); + initIncludePackages(); + initExcludeClassRegexs(); + } + + private static String getProperty(String key) { + if (null != props && AgentUtils.isNotBlank(key)) { + return props.getProperty(key); + } + return null; + } + + private static Properties getProperties(String propertiesFileName) { + Properties properties = new Properties(); + InputStream input = null; + try { + input = ConfigUtils.class.getClassLoader().getResourceAsStream("agent.properties"); + properties.load(input); + } catch (Exception e) { + System.err.println("未找到默认配置"); + } finally { + AgentUtils.closeQuietly(input); + } + if (AgentUtils.isNotBlank(propertiesFileName)) { + try { + input = new FileInputStream(propertiesFileName); + properties.load(input); + } catch (Exception e) { + System.err.println(e); + } finally { + AgentUtils.closeQuietly(input); + } + } + return properties; + } + + public static Set getExcludePackages() { + return excludePackages; + } + + private static void initExcludePackages() { + if (null == excludePackages) { + String excludeDefault = getProperty(ConfigConsts.EXCLUDE_PACKAGE_DEFAULT); + String excludes = getProperty(ConfigConsts.EXCLUDE_PACKAGE); + excludePackages = new HashSet(); + if (AgentUtils.isNotBlank(excludeDefault)) { + excludePackages.addAll(Arrays.asList(excludeDefault.split(";"))); + } + if (AgentUtils.isNotBlank(excludes)) { + excludePackages.addAll(Arrays.asList(excludes.split(";"))); + } + } + } + + public static Set getIncludePackages() { + return includePackages; + } + + private static void initIncludePackages() { + if (null == includePackages) { + String includes = getProperty(ConfigConsts.INCLUDE_PACKAGE); + includePackages = new HashSet(); + if (AgentUtils.isNotBlank(includes)) { + includePackages.addAll(Arrays.asList(includes.split(";"))); + } + } + } + + public static String getLogFileName() { + return getProperty(ConfigConsts.LOG_FILE); + } + + public static int getLogInterval() { + String intervalStr = getProperty(ConfigConsts.LOG_INTERVAL_SECONDS); + if (AgentUtils.isBlank(intervalStr)) { + return ConfigConsts.DEFAULT_LOG_INTERVAL; + } + return Integer.parseInt(intervalStr); + } + + public static Set getExcludeClassRegexs() { + return excludeClassRegexs; + } + + private static void initExcludeClassRegexs() { + if (null == excludeClassRegexs) { + Set excludeClassRegexsTemp = new HashSet(); + String defaultRegex = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX_DEFAULT); + if (AgentUtils.isNotBlank(defaultRegex)) { + excludeClassRegexsTemp.addAll(Arrays.asList(defaultRegex.split(";"))); + } + String excludeRegexStr = getProperty(ConfigConsts.EXCLUDE_CLASS_REGEX); + if (AgentUtils.isNotBlank(excludeRegexStr)) { + excludeClassRegexsTemp.addAll(Arrays.asList(excludeRegexStr.split(";"))); + } + excludeClassRegexs = excludeClassRegexsTemp; + } + } + + public static boolean isLogAvgExecuteTime() { + String value = getProperty(ConfigConsts.LOG_AVG_EXECUTE_TIME); + return "true".equalsIgnoreCase(value); + } + + /** + * 是否开启pojo的监控 + * + * @return 是否开启pojo的监控 + * @author dingjsh + */ + public static boolean isOpenPojoMonitor() { + String value = getProperty(ConfigConsts.POJO_MONITOR_OPEN); + return "true".equalsIgnoreCase(value); + } + + /** + * ConfigUtils + * + * @return 是否采用nanoTime来记录方法的执行时间 + * @description 是否采用nanoTime来记录方法的执行时间 + * @author dingjsh + * @date 2018年5月25日 下午2:08:33 + * @version 1.2.0 + */ + public static boolean isUsingNanoTime() { + String value = getProperty(ConfigConsts.LOG_TIME_NANO); + return "true".equalsIgnoreCase(value); + } +} diff --git a/src/main/java/com/wenshuo/agent/NamedThreadFactory.java b/src/main/java/com/wenshuo/agent/NamedThreadFactory.java new file mode 100644 index 0000000..6daceec --- /dev/null +++ b/src/main/java/com/wenshuo/agent/NamedThreadFactory.java @@ -0,0 +1,35 @@ +package com.wenshuo.agent; + +import java.util.concurrent.ThreadFactory; +import java.util.concurrent.atomic.AtomicInteger; + +/** + * 此类是拷贝的dubbo中的NamedThreadFactory,在创建线程池时总是没有名字，区分不出来是哪个线程池创建的，不便于调试 + * NamedThreadFactory + * @author dingjsh + * @time 2016-5-19上午09:40:50 + */ +public class NamedThreadFactory implements ThreadFactory { + private final AtomicInteger mThreadNum = new AtomicInteger(1); + + private final String mPrefix; + + private final boolean mDaemon; + + private final ThreadGroup mGroup; + + public NamedThreadFactory(String prefix, boolean daemon) { + mPrefix = prefix + "-thread-"; + mDaemon = daemon; + SecurityManager s = System.getSecurityManager(); + mGroup = (s == null) ? Thread.currentThread().getThreadGroup() : s + .getThreadGroup(); + } + + public Thread newThread(Runnable runnable) { + String name = mPrefix + mThreadNum.getAndIncrement(); + Thread ret = new Thread(mGroup, runnable, name, 0); + ret.setDaemon(mDaemon); + return ret; + } +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/PojoDetector.java b/src/main/java/com/wenshuo/agent/PojoDetector.java new file mode 100644 index 0000000..48cf45c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/PojoDetector.java @@ -0,0 +1,65 @@ +/* + * @(#)PojoDetector.java 2016-5-7 下午04:18:14 + * javaagent + * Copyright 2016 wenshuo, Inc. All rights reserved. + * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent; + +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import com.wenshuo.agent.javassist.CtMethod; + +/** + * PojoDetector + * @author dingjsh + * @time 2016-5-7下午04:18:14 + */ +public class PojoDetector { + + public static Set getPojoMethodNames(CtMethod[] methods){ + Set pojoMethods = Collections.emptySet(); + if(null != methods && methods.length>0){ + pojoMethods = new HashSet(); + Map propName2MethodName = new HashMap(); + for(CtMethod method : methods){ + String methodName = method.getName(); + if(isSetMethod(methodName) || isGetMethod(methodName)){ + String propName = getPojoPropertyName(methodName); + if(propName2MethodName.containsKey(propName)){ + pojoMethods.add(methodName); + pojoMethods.add(propName2MethodName.get(propName)); + }else{ + propName2MethodName.put(propName, methodName); + } + } + } + } + return pojoMethods; + } + + + + private static boolean isGetMethod(String methodName){ + return methodName.startsWith("get") || methodName.startsWith("is"); + } + + private static boolean isSetMethod(String methodName){ + return methodName.startsWith("set"); + } + + private static String getPojoPropertyName(String methodName){ + if(methodName.startsWith("get") || methodName.startsWith("set")){ + return methodName.substring(3); + }else if(methodName.startsWith("is")){ + return methodName.substring(2); + } + return ""; + } + + +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java b/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java new file mode 100644 index 0000000..d4d9347 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java @@ -0,0 +1,99 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.*; +import java.net.URL; +import java.net.MalformedURLException; + +/** + * A ByteArrayClassPath contains bytes that is served as + * a class file to a ClassPool. It is useful to convert + * a byte array to a CtClass object. + * + *

For example, if you want to convert a byte array b + * into a CtClass object representing the class with a name + * classname, then do as following: + * + * 

+ * ClassPool cp = ClassPool.getDefault();
+ * cp.insertClassPath(new ByteArrayClassPath(classname, b));
+ * CtClass cc = cp.get(classname);
+ *
+ * + *

The ClassPool object cp uses the created + * ByteArrayClassPath object as the source of the class file. + * + *

A ByteArrayClassPath must be instantiated for every + * class. It contains only a single class file. + * + * @see javassist.ClassPath + * @see ClassPool#insertClassPath(ClassPath) + * @see ClassPool#appendClassPath(ClassPath) + * @see ClassPool#makeClass(InputStream) + */ +public class ByteArrayClassPath implements ClassPath { + protected String classname; + protected byte[] classfile; + + /* + * Creates a ByteArrayClassPath containing the given + * bytes. + * + * @param name a fully qualified class name + * @param classfile the contents of a class file. + */ + public ByteArrayClassPath(String name, byte[] classfile) { + this.classname = name; + this.classfile = classfile; + } + + /** + * Closes this class path. + */ + public void close() {} + + public String toString() { + return "byte[]:" + classname; + } + + /** + * Opens the class file. + */ + public InputStream openClassfile(String classname) { + if(this.classname.equals(classname)) + return new ByteArrayInputStream(classfile); + else + return null; + } + + /** + * Obtains the URL. + */ + public URL find(String classname) { + if(this.classname.equals(classname)) { + String cname = classname.replace('.', '/') + ".class"; + try { + // return new File(cname).toURL(); + return new URL("file:/ByteArrayClassPath/" + cname); + } + catch (MalformedURLException e) {} + } + + return null; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java b/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java new file mode 100644 index 0000000..31057c8 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java @@ -0,0 +1,120 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Thrown when bytecode transformation has failed. + */ +public class CannotCompileException extends Exception { + private Throwable myCause; + + /** + * Gets the cause of this throwable. + * It is for JDK 1.3 compatibility. + */ + public Throwable getCause() { + return (myCause == this ? null : myCause); + } + + /** + * Initializes the cause of this throwable. + * It is for JDK 1.3 compatibility. + */ + public synchronized Throwable initCause(Throwable cause) { + myCause = cause; + return this; + } + + private String message; + + /** + * Gets a long message if it is available. + */ + public String getReason() { + if (message != null) + return message; + else + return this.toString(); + } + + /** + * Constructs a CannotCompileException with a message. + * + * @param msg the message. + */ + public CannotCompileException(String msg) { + super(msg); + message = msg; + initCause(null); + } + + /** + * Constructs a CannotCompileException with an Exception + * representing the cause. + * + * @param e the cause. + */ + public CannotCompileException(Throwable e) { + super("by " + e.toString()); + message = null; + initCause(e); + } + + /** + * Constructs a CannotCompileException with a detailed message + * and an Exception representing the cause. + * + * @param msg the message. + * @param e the cause. + */ + public CannotCompileException(String msg, Throwable e) { + this(msg); + initCause(e); + } + + /** + * Constructs a CannotCompileException with a + * NotFoundException. + */ + public CannotCompileException(NotFoundException e) { + this("cannot find " + e.getMessage(), e); + } + + /** + * Constructs a CannotCompileException with an CompileError. + */ + public CannotCompileException(CompileError e) { + this("[source error] " + e.getMessage(), e); + } + + /** + * Constructs a CannotCompileException + * with a ClassNotFoundException. + */ + public CannotCompileException(ClassNotFoundException e, String name) { + this("cannot find " + name, e); + } + + /** + * Constructs a CannotCompileException with a ClassFormatError. + */ + public CannotCompileException(ClassFormatError e, String name) { + this("invalid class format: " + name, e); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java b/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java new file mode 100644 index 0000000..be42a50 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java @@ -0,0 +1,97 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.InputStream; +import java.net.URL; + +/** + * A search-path for obtaining a class file + * by getResourceAsStream() in java.lang.Class. + * + *

Try adding a ClassClassPath when a program is running + * with a user-defined class loader and any class files are not found with + * the default ClassPool. For example, + * + * 

+ * ClassPool cp = ClassPool.getDefault();
+ * cp.insertClassPath(new ClassClassPath(this.getClass()));
+ *
+ * + * This code snippet permanently adds a ClassClassPath + * to the default ClassPool. Note that the default + * ClassPool is a singleton. The added + * ClassClassPath uses a class object representing + * the class including the code snippet above. + * + * @see ClassPool#insertClassPath(ClassPath) + * @see ClassPool#appendClassPath(ClassPath) + * @see LoaderClassPath + */ +public class ClassClassPath implements ClassPath { + private Class thisClass; + + /** Creates a search path. + * + * @param c the Class object used to obtain a class + * file. getResourceAsStream() is called on + * this object. + */ + public ClassClassPath(Class c) { + thisClass = c; + } + + ClassClassPath() { + /* The value of thisClass was this.getClass() in early versions: + * + * thisClass = this.getClass(); + * + * However, this made openClassfile() not search all the system + * class paths if javassist.jar is put in jre/lib/ext/ + * (with JDK1.4). + */ + this(java.lang.Object.class); + } + + /** + * Obtains a class file by getResourceAsStream(). + */ + public InputStream openClassfile(String classname) { + String jarname = "/" + classname.replace('.', '/') + ".class"; + return thisClass.getResourceAsStream(jarname); + } + + /** + * Obtains the URL of the specified class file. + * + * @return null if the class file could not be found. + */ + public URL find(String classname) { + String jarname = "/" + classname.replace('.', '/') + ".class"; + return thisClass.getResource(jarname); + } + + /** + * Does nothing. + */ + public void close() { + } + + public String toString() { + return thisClass.getName() + ".class"; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassMap.java b/src/main/java/com/wenshuo/agent/javassist/ClassMap.java new file mode 100644 index 0000000..2dbf987 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ClassMap.java @@ -0,0 +1,173 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.Descriptor; + +/** + * A hash table associating class names with different names. + * + *

This hashtable is used for replacing class names in a class + * definition or a method body. Define a subclass of this class + * if a more complex mapping algorithm is needed. For example, + * + * 

class MyClassMap extends ClassMap {
+ *   public Object get(Object jvmClassName) {
+ *     String name = toJavaName((String)jvmClassName);
+ *     if (name.startsWith("java."))
+ *         return toJvmName("java2." + name.substring(5));
+ *     else
+ *         return super.get(jvmClassName);
+ *   }
+ * }
+ * + *

This subclass maps java.lang.String to + * java2.lang.String. Note that get() + * receives and returns the internal representation of a class name. + * For example, the internal representation of java.lang.String + * is java/lang/String. + * + *

Note that this is a map from String to String. + * + * @see #get(Object) + * @see CtClass#replaceClassName(ClassMap) + * @see CtNewMethod#copy(CtMethod,String,CtClass,ClassMap) + */ +public class ClassMap extends java.util.HashMap { + private ClassMap parent; + + /** + * Constructs a hash table. + */ + public ClassMap() { parent = null; } + + ClassMap(ClassMap map) { parent = map; } + + /** + * Maps a class name to another name in this hashtable. + * The names are obtained with calling Class.getName(). + * This method translates the given class names into the + * internal form used in the JVM before putting it in + * the hashtable. + * + * @param oldname the original class name + * @param newname the substituted class name. + */ + public void put(CtClass oldname, CtClass newname) { + put(oldname.getName(), newname.getName()); + } + + /** + * Maps a class name to another name in this hashtable. + * If the hashtable contains another mapping from the same + * class name, the old mapping is replaced. + * This method translates the given class names into the + * internal form used in the JVM before putting it in + * the hashtable. + * + *

If oldname is identical to + * newname, then this method does not + * perform anything; it does not record the mapping from + * oldname to newname. See + * fix method. + * + * @param oldname the original class name. + * @param newname the substituted class name. + * @see #fix(String) + */ + public void put(String oldname, String newname) { + if (oldname == newname) + return; + + String oldname2 = toJvmName(oldname); + String s = (String)get(oldname2); + if (s == null || !s.equals(oldname2)) + super.put(oldname2, toJvmName(newname)); + } + + /** + * Is equivalent to put() except that + * the given mapping is not recorded into the hashtable + * if another mapping from oldname is + * already included. + * + * @param oldname the original class name. + * @param newname the substituted class name. + */ + public void putIfNone(String oldname, String newname) { + if (oldname == newname) + return; + + String oldname2 = toJvmName(oldname); + String s = (String)get(oldname2); + if (s == null) + super.put(oldname2, toJvmName(newname)); + } + + protected final void put0(Object oldname, Object newname) { + super.put(oldname, newname); + } + + /** + * Returns the class name to wihch the given jvmClassName + * is mapped. A subclass of this class should override this method. + * + *

This method receives and returns the internal representation of + * class name used in the JVM. + * + * @see #toJvmName(String) + * @see #toJavaName(String) + */ + public Object get(Object jvmClassName) { + Object found = super.get(jvmClassName); + if (found == null && parent != null) + return parent.get(jvmClassName); + else + return found; + } + + /** + * Prevents a mapping from the specified class name to another name. + */ + public void fix(CtClass clazz) { + fix(clazz.getName()); + } + + /** + * Prevents a mapping from the specified class name to another name. + */ + public void fix(String name) { + String name2 = toJvmName(name); + super.put(name2, name2); + } + + /** + * Converts a class name into the internal representation used in + * the JVM. + */ + public static String toJvmName(String classname) { + return Descriptor.toJvmName(classname); + } + + /** + * Converts a class name from the internal representation used in + * the JVM to the normal one used in Java. + */ + public static String toJavaName(String classname) { + return Descriptor.toJavaName(classname); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPath.java b/src/main/java/com/wenshuo/agent/javassist/ClassPath.java new file mode 100644 index 0000000..f0e90e2 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ClassPath.java @@ -0,0 +1,68 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.InputStream; +import java.net.URL; + +/** + * ClassPath is an interface implemented by objects + * representing a class search path. + * ClassPool uses those objects for reading class files. + * + *

The users can define a class implementing this interface so that + * a class file is obtained from a non-standard source. + * + * @see ClassPool#insertClassPath(ClassPath) + * @see ClassPool#appendClassPath(ClassPath) + * @see ClassPool#removeClassPath(ClassPath) + */ +public interface ClassPath { + /** + * Opens a class file. + * This method may be called just to examine whether the class file + * exists as well as to read the contents of the file. + * + *

This method can return null if the specified class file is not + * found. If null is returned, the next search path is examined. + * However, if an error happens, this method must throw an exception + * so that the search will be terminated. + * + *

This method should not modify the contents of the class file. + * + * @param classname a fully-qualified class name + * @return the input stream for reading a class file + * @see javassist.Translator + */ + InputStream openClassfile(String classname) throws NotFoundException; + + /** + * Returns the uniform resource locator (URL) of the class file + * with the specified name. + * + * @param classname a fully-qualified class name. + * @return null if the specified class file could not be found. + */ + URL find(String classname); + + /** + * This method is invoked when the ClassPath object is + * detached from the search path. It will be an empty method in most of + * classes. + */ + void close(); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPool.java b/src/main/java/com/wenshuo/agent/javassist/ClassPool.java new file mode 100644 index 0000000..2114b1f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ClassPool.java @@ -0,0 +1,1233 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.BufferedInputStream; +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.lang.reflect.Method; +import java.net.URL; +import java.security.AccessController; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.security.ProtectionDomain; +import java.util.Hashtable; +import java.util.Iterator; +import java.util.ArrayList; +import java.util.Enumeration; + +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.Descriptor; + +/** + * A container of CtClass objects. + * A CtClass object must be obtained from this object. + * If get() is called on this object, + * it searches various sources represented by ClassPath + * to find a class file and then it creates a CtClass object + * representing that class file. The created object is returned to the + * caller. + * + *

Memory consumption memo: + * + *

ClassPool objects hold all the CtClasses + * that have been created so that the consistency among modified classes + * can be guaranteed. Thus if a large number of CtClasses + * are processed, the ClassPool will consume a huge amount + * of memory. To avoid this, a ClassPool object + * should be recreated, for example, every hundred classes processed. + * Note that getDefault() is a singleton factory. + * Otherwise, detach() in CtClass should be used + * to avoid huge memory consumption. + * + *

ClassPool hierarchy: + * + *

ClassPools can make a parent-child hierarchy as + * java.lang.ClassLoaders. If a ClassPool has + * a parent pool, get() first asks the parent pool to find + * a class file. Only if the parent could not find the class file, + * get() searches the ClassPaths of + * the child ClassPool. This search order is reversed if + * ClassPath.childFirstLookup is true. + * + * @see javassist.CtClass + * @see javassist.ClassPath + */ +public class ClassPool { + // used by toClass(). + private static java.lang.reflect.Method defineClass1, defineClass2; + private static java.lang.reflect.Method definePackage; + + static { + try { + AccessController.doPrivileged(new PrivilegedExceptionAction(){ + public Object run() throws Exception{ + Class cl = Class.forName("java.lang.ClassLoader"); + defineClass1 = cl.getDeclaredMethod("defineClass", + new Class[] { String.class, byte[].class, + int.class, int.class }); + + defineClass2 = cl.getDeclaredMethod("defineClass", + new Class[] { String.class, byte[].class, + int.class, int.class, ProtectionDomain.class }); + + definePackage = cl.getDeclaredMethod("definePackage", + new Class[] { String.class, String.class, String.class, + String.class, String.class, String.class, + String.class, java.net.URL.class }); + return null; + } + }); + } + catch (PrivilegedActionException pae) { + throw new RuntimeException("cannot initialize ClassPool", pae.getException()); + } + } + + /** + * Determines the search order. + * + *

If this field is true, get() first searches the + * class path associated to this ClassPool and then + * the class path associated with the parent ClassPool. + * Otherwise, the class path associated with the parent is searched + * first. + * + *

The default value is false. + */ + public boolean childFirstLookup = false; + + /** + * Turning the automatic pruning on/off. + * + *

If this field is true, CtClass objects are + * automatically pruned by default when toBytecode() etc. + * are called. The automatic pruning can be turned on/off individually + * for each CtClass object. + * + *

The initial value is false. + * + * @see CtClass#prune() + * @see CtClass#stopPruning(boolean) + * @see CtClass#detach() + */ + public static boolean doPruning = false; + + private int compressCount; + private static final int COMPRESS_THRESHOLD = 100; + + /* releaseUnmodifiedClassFile was introduced for avoiding a bug + of JBoss AOP. So the value should be true except for JBoss AOP. + */ + + /** + * If true, unmodified and not-recently-used class files are + * periodically released for saving memory. + * + *

The initial value is true. + */ + public static boolean releaseUnmodifiedClassFile = true; + + protected ClassPoolTail source; + protected ClassPool parent; + protected Hashtable classes; // should be synchronous + + /** + * Table of registered cflow variables. + */ + private Hashtable cflow = null; // should be synchronous. + + private static final int INIT_HASH_SIZE = 191; + + private ArrayList importedPackages; + + /** + * Creates a root class pool. No parent class pool is specified. + */ + public ClassPool() { + this(null); + } + + /** + * Creates a root class pool. If useDefaultPath is + * true, appendSystemPath() is called. Otherwise, + * this constructor is equivalent to the constructor taking no + * parameter. + * + * @param useDefaultPath true if the system search path is + * appended. + */ + public ClassPool(boolean useDefaultPath) { + this(null); + if (useDefaultPath) + appendSystemPath(); + } + + /** + * Creates a class pool. + * + * @param parent the parent of this class pool. If this is a root + * class pool, this parameter must be null. + * @see javassist.ClassPool#getDefault() + */ + public ClassPool(ClassPool parent) { + this.classes = new Hashtable(INIT_HASH_SIZE); + this.source = new ClassPoolTail(); + this.parent = parent; + if (parent == null) { + CtClass[] pt = CtClass.primitiveTypes; + for (int i = 0; i < pt.length; ++i) + classes.put(pt[i].getName(), pt[i]); + } + + this.cflow = null; + this.compressCount = 0; + clearImportedPackages(); + } + + /** + * Returns the default class pool. + * The returned object is always identical since this method is + * a singleton factory. + * + *

The default class pool searches the system search path, + * which usually includes the platform library, extension + * libraries, and the search path specified by the + * -classpath option or the CLASSPATH + * environment variable. + * + *

When this method is called for the first time, the default + * class pool is created with the following code snippet: + * + * 

ClassPool cp = new ClassPool();
+     * cp.appendSystemPath();
+     *
+ * + *

If the default class pool cannot find any class files, + * try ClassClassPath and LoaderClassPath. + * + * @see ClassClassPath + * @see LoaderClassPath + */ + public static synchronized ClassPool getDefault() { + if (defaultPool == null) { + defaultPool = new ClassPool(null); + defaultPool.appendSystemPath(); + } + + return defaultPool; + } + + private static ClassPool defaultPool = null; + + /** + * Provide a hook so that subclasses can do their own + * caching of classes. + * + * @see #cacheCtClass(String,CtClass,boolean) + * @see #removeCached(String) + */ + protected CtClass getCached(String classname) { + return (CtClass)classes.get(classname); + } + + /** + * Provides a hook so that subclasses can do their own + * caching of classes. + * + * @see #getCached(String) + * @see #removeCached(String) + */ + protected void cacheCtClass(String classname, CtClass c, boolean dynamic) { + classes.put(classname, c); + } + + /** + * Provide a hook so that subclasses can do their own + * caching of classes. + * + * @see #getCached(String) + * @see #cacheCtClass(String,CtClass,boolean) + */ + protected CtClass removeCached(String classname) { + return (CtClass)classes.remove(classname); + } + + /** + * Returns the class search path. + */ + public String toString() { + return source.toString(); + } + + /** + * This method is periodically invoked so that memory + * footprint will be minimized. + */ + void compress() { + if (compressCount++ > COMPRESS_THRESHOLD) { + compressCount = 0; + Enumeration e = classes.elements(); + while (e.hasMoreElements()) + ((CtClass)e.nextElement()).compress(); + } + } + + /** + * Record a package name so that the Javassist compiler searches + * the package to resolve a class name. + * Don't record the java.lang package, which has + * been implicitly recorded by default. + * + *

Since version 3.14, packageName can be a + * fully-qualified class name. + * + *

Note that get() in ClassPool does + * not search the recorded package. Only the compiler searches it. + * + * @param packageName the package name. + * It must not include the last '.' (dot). + * For example, "java.util" is valid but "java.util." is wrong. + * @since 3.1 + */ + public void importPackage(String packageName) { + importedPackages.add(packageName); + } + + /** + * Clear all the package names recorded by importPackage(). + * The java.lang package is not removed. + * + * @see #importPackage(String) + * @since 3.1 + */ + public void clearImportedPackages() { + importedPackages = new ArrayList(); + importedPackages.add("java.lang"); + } + + /** + * Returns all the package names recorded by importPackage(). + * + * @see #importPackage(String) + * @since 3.1 + */ + public Iterator getImportedPackages() { + return importedPackages.iterator(); + } + + /** + * Records a class name that never exists. + * For example, a package name can be recorded by this method. + * This would improve execution performance + * since get() quickly throw an exception + * without searching the class path at all + * if the given name is an invalid name recorded by this method. + * Note that searching the class path takes relatively long time. + * + *

The current implementation of this method performs nothing. + * + * @param name an invalid class name (separeted by dots). + * @deprecated + */ + public void recordInvalidClassName(String name) { + // source.recordInvalidClassName(name); + } + + /** + * Records the $cflow variable for the field specified + * by cname and fname. + * + * @param name variable name + * @param cname class name + * @param fname field name + */ + void recordCflow(String name, String cname, String fname) { + if (cflow == null) + cflow = new Hashtable(); + + cflow.put(name, new Object[] { cname, fname }); + } + + /** + * Undocumented method. Do not use; internal-use only. + * + * @param name the name of $cflow variable + */ + public Object[] lookupCflow(String name) { + if (cflow == null) + cflow = new Hashtable(); + + return (Object[])cflow.get(name); + } + + /** + * Reads a class file and constructs a CtClass + * object with a new name. + * This method is useful if you want to generate a new class as a copy + * of another class (except the class name). For example, + * + * 

+     * getAndRename("Point", "Pair")
+     *
+ * + * returns a CtClass object representing Pair + * class. The definition of Pair is the same as that of + * Point class except the class name since Pair + * is defined by reading Point.class. + * + * @param orgName the original (fully-qualified) class name + * @param newName the new class name + */ + public CtClass getAndRename(String orgName, String newName) + throws NotFoundException + { + CtClass clazz = get0(orgName, false); + if (clazz == null) + throw new NotFoundException(orgName); + + if (clazz instanceof CtClassType) + ((CtClassType)clazz).setClassPool(this); + + clazz.setName(newName); // indirectly calls + // classNameChanged() in this class + return clazz; + } + + /* + * This method is invoked by CtClassType.setName(). It removes a + * CtClass object from the hash table and inserts it with the new + * name. Don't delegate to the parent. + */ + synchronized void classNameChanged(String oldname, CtClass clazz) { + CtClass c = (CtClass)getCached(oldname); + if (c == clazz) // must check this equation. + removeCached(oldname); // see getAndRename(). + + String newName = clazz.getName(); + checkNotFrozen(newName); + cacheCtClass(newName, clazz, false); + } + + /** + * Reads a class file from the source and returns a reference + * to the CtClass + * object representing that class file. If that class file has been + * already read, this method returns a reference to the + * CtClass created when that class file was read at the + * first time. + * + *

If classname ends with "[]", then this method + * returns a CtClass object for that array type. + * + *

To obtain an inner class, use "$" instead of "." for separating + * the enclosing class name and the inner class name. + * + * @param classname a fully-qualified class name. + */ + public CtClass get(String classname) throws NotFoundException { + CtClass clazz; + if (classname == null) + clazz = null; + else + clazz = get0(classname, true); + + if (clazz == null) + throw new NotFoundException(classname); + else { + clazz.incGetCounter(); + return clazz; + } + } + + /** + * Reads a class file from the source and returns a reference + * to the CtClass + * object representing that class file. + * This method is equivalent to get except + * that it returns null when a class file is + * not found and it never throws an exception. + * + * @param classname a fully-qualified class name. + * @return a CtClass object or null. + * @see #get(String) + * @see #find(String) + * @since 3.13 + */ + public CtClass getOrNull(String classname) { + CtClass clazz = null; + if (classname == null) + clazz = null; + else + try { + /* ClassPool.get0() never throws an exception + but its subclass may implement get0 that + may throw an exception. + */ + clazz = get0(classname, true); + } + catch (NotFoundException e){} + + if (clazz != null) + clazz.incGetCounter(); + + return clazz; + } + + /** + * Returns a CtClass object with the given name. + * This is almost equivalent to get(String) except + * that classname can be an array-type "descriptor" (an encoded + * type name) such as [Ljava/lang/Object;. + * + *

Using this method is not recommended; this method should be + * used only to obtain the CtClass object + * with a name returned from getClassInfo in + * javassist.bytecode.ClassPool. getClassInfo + * returns a fully-qualified class name but, if the class is an array + * type, it returns a descriptor. + * + * @param classname a fully-qualified class name or a descriptor + * representing an array type. + * @see #get(String) + * @see javassist.bytecode.ConstPool#getClassInfo(int) + * @see javassist.bytecode.Descriptor#toCtClass(String, ClassPool) + * @since 3.8.1 + */ + public CtClass getCtClass(String classname) throws NotFoundException { + if (classname.charAt(0) == '[') + return Descriptor.toCtClass(classname, this); + else + return get(classname); + } + + /** + * @param useCache false if the cached CtClass must be ignored. + * @return null if the class could not be found. + */ + protected synchronized CtClass get0(String classname, boolean useCache) + throws NotFoundException + { + CtClass clazz = null; + if (useCache) { + clazz = getCached(classname); + if (clazz != null) + return clazz; + } + + if (!childFirstLookup && parent != null) { + clazz = parent.get0(classname, useCache); + if (clazz != null) + return clazz; + } + + clazz = createCtClass(classname, useCache); + if (clazz != null) { + // clazz.getName() != classname if classname is "[L;". + if (useCache) + cacheCtClass(clazz.getName(), clazz, false); + + return clazz; + } + + if (childFirstLookup && parent != null) + clazz = parent.get0(classname, useCache); + + return clazz; + } + + /** + * Creates a CtClass object representing the specified class. + * It first examines whether or not the corresponding class + * file exists. If yes, it creates a CtClass object. + * + * @return null if the class file could not be found. + */ + protected CtClass createCtClass(String classname, boolean useCache) { + // accept "[L;" as a class name. + if (classname.charAt(0) == '[') + classname = Descriptor.toClassName(classname); + + if (classname.endsWith("[]")) { + String base = classname.substring(0, classname.indexOf('[')); + if ((!useCache || getCached(base) == null) && find(base) == null) + return null; + else + return new CtArray(classname, this); + } + else + if (find(classname) == null) + return null; + else + return new CtClassType(classname, this); + } + + /** + * Searches the class path to obtain the URL of the class file + * specified by classname. It is also used to determine whether + * the class file exists. + * + * @param classname a fully-qualified class name. + * @return null if the class file could not be found. + * @see CtClass#getURL() + */ + public URL find(String classname) { + return source.find(classname); + } + + /* + * Is invoked by CtClassType.setName() and methods in this class. + * This method throws an exception if the class is already frozen or + * if this class pool cannot edit the class since it is in a parent + * class pool. + * + * @see checkNotExists(String) + */ + void checkNotFrozen(String classname) throws RuntimeException { + CtClass clazz = getCached(classname); + if (clazz == null) { + if (!childFirstLookup && parent != null) { + try { + clazz = parent.get0(classname, true); + } + catch (NotFoundException e) {} + if (clazz != null) + throw new RuntimeException(classname + + " is in a parent ClassPool. Use the parent."); + } + } + else + if (clazz.isFrozen()) + throw new RuntimeException(classname + + ": frozen class (cannot edit)"); + } + + /* + * This method returns null if this or its parent class pool does + * not contain a CtClass object with the class name. + * + * @see checkNotFrozen(String) + */ + CtClass checkNotExists(String classname) { + CtClass clazz = getCached(classname); + if (clazz == null) + if (!childFirstLookup && parent != null) { + try { + clazz = parent.get0(classname, true); + } + catch (NotFoundException e) {} + } + + return clazz; + } + + /* for CtClassType.getClassFile2(). Don't delegate to the parent. + */ + InputStream openClassfile(String classname) throws NotFoundException { + return source.openClassfile(classname); + } + + void writeClassfile(String classname, OutputStream out) + throws NotFoundException, IOException, CannotCompileException + { + source.writeClassfile(classname, out); + } + + /** + * Reads class files from the source and returns an array of + * CtClass + * objects representing those class files. + * + *

If an element of classnames ends with "[]", + * then this method + * returns a CtClass object for that array type. + * + * @param classnames an array of fully-qualified class name. + */ + public CtClass[] get(String[] classnames) throws NotFoundException { + if (classnames == null) + return new CtClass[0]; + + int num = classnames.length; + CtClass[] result = new CtClass[num]; + for (int i = 0; i < num; ++i) + result[i] = get(classnames[i]); + + return result; + } + + /** + * Reads a class file and obtains a compile-time method. + * + * @param classname the class name + * @param methodname the method name + * @see CtClass#getDeclaredMethod(String) + */ + public CtMethod getMethod(String classname, String methodname) + throws NotFoundException + { + CtClass c = get(classname); + return c.getDeclaredMethod(methodname); + } + + /** + * Creates a new class (or interface) from the given class file. + * If there already exists a class with the same name, the new class + * overwrites that previous class. + * + *

This method is used for creating a CtClass object + * directly from a class file. The qualified class name is obtained + * from the class file; you do not have to explicitly give the name. + * + * @param classfile class file. + * @throws RuntimeException if there is a frozen class with the + * the same name. + * @see #makeClassIfNew(InputStream) + * @see javassist.ByteArrayClassPath + */ + public CtClass makeClass(InputStream classfile) + throws IOException, RuntimeException + { + return makeClass(classfile, true); + } + + /** + * Creates a new class (or interface) from the given class file. + * If there already exists a class with the same name, the new class + * overwrites that previous class. + * + *

This method is used for creating a CtClass object + * directly from a class file. The qualified class name is obtained + * from the class file; you do not have to explicitly give the name. + * + * @param classfile class file. + * @param ifNotFrozen throws a RuntimeException if this parameter is true + * and there is a frozen class with the same name. + * @see javassist.ByteArrayClassPath + */ + public CtClass makeClass(InputStream classfile, boolean ifNotFrozen) + throws IOException, RuntimeException + { + compress(); + classfile = new BufferedInputStream(classfile); + CtClass clazz = new CtClassType(classfile, this); + clazz.checkModify(); + String classname = clazz.getName(); + if (ifNotFrozen) + checkNotFrozen(classname); + + cacheCtClass(classname, clazz, true); + return clazz; + } + + /** + * Creates a new class (or interface) from the given class file. + * If there already exists a class with the same name, the new class + * overwrites that previous class. + * + *

This method is used for creating a CtClass object + * directly from a class file. The qualified class name is obtained + * from the class file; you do not have to explicitly give the name. + * + * @param classfile class file. + * @throws RuntimeException if there is a frozen class with the + * the same name. + * @since 3.20 + */ + public CtClass makeClass(ClassFile classfile) + throws RuntimeException + { + return makeClass(classfile, true); + } + + /** + * Creates a new class (or interface) from the given class file. + * If there already exists a class with the same name, the new class + * overwrites that previous class. + * + *

This method is used for creating a CtClass object + * directly from a class file. The qualified class name is obtained + * from the class file; you do not have to explicitly give the name. + * + * @param classfile class file. + * @param ifNotFrozen throws a RuntimeException if this parameter is true + * and there is a frozen class with the same name. + * @since 3.20 + */ + public CtClass makeClass(ClassFile classfile, boolean ifNotFrozen) + throws RuntimeException + { + compress(); + CtClass clazz = new CtClassType(classfile, this); + clazz.checkModify(); + String classname = clazz.getName(); + if (ifNotFrozen) + checkNotFrozen(classname); + + cacheCtClass(classname, clazz, true); + return clazz; + } + + /** + * Creates a new class (or interface) from the given class file. + * If there already exists a class with the same name, this method + * returns the existing class; a new class is never created from + * the given class file. + * + *

This method is used for creating a CtClass object + * directly from a class file. The qualified class name is obtained + * from the class file; you do not have to explicitly give the name. + * + * @param classfile the class file. + * @see #makeClass(InputStream) + * @see javassist.ByteArrayClassPath + * @since 3.9 + */ + public CtClass makeClassIfNew(InputStream classfile) + throws IOException, RuntimeException + { + compress(); + classfile = new BufferedInputStream(classfile); + CtClass clazz = new CtClassType(classfile, this); + clazz.checkModify(); + String classname = clazz.getName(); + CtClass found = checkNotExists(classname); + if (found != null) + return found; + else { + cacheCtClass(classname, clazz, true); + return clazz; + } + } + + /** + * Creates a new public class. + * If there already exists a class with the same name, the new class + * overwrites that previous class. + * + *

If no constructor is explicitly added to the created new + * class, Javassist generates constructors and adds it when + * the class file is generated. It generates a new constructor + * for each constructor of the super class. The new constructor + * takes the same set of parameters and invokes the + * corresponding constructor of the super class. All the received + * parameters are passed to it. + * + * @param classname a fully-qualified class name. + * @throws RuntimeException if the existing class is frozen. + */ + public CtClass makeClass(String classname) throws RuntimeException { + return makeClass(classname, null); + } + + /** + * Creates a new public class. + * If there already exists a class/interface with the same name, + * the new class overwrites that previous class. + * + *

If no constructor is explicitly added to the created new + * class, Javassist generates constructors and adds it when + * the class file is generated. It generates a new constructor + * for each constructor of the super class. The new constructor + * takes the same set of parameters and invokes the + * corresponding constructor of the super class. All the received + * parameters are passed to it. + * + * @param classname a fully-qualified class name. + * @param superclass the super class. + * @throws RuntimeException if the existing class is frozen. + */ + public synchronized CtClass makeClass(String classname, CtClass superclass) + throws RuntimeException + { + checkNotFrozen(classname); + CtClass clazz = new CtNewClass(classname, this, false, superclass); + cacheCtClass(classname, clazz, true); + return clazz; + } + + /** + * Creates a new public nested class. + * This method is called by {@link CtClassType#makeNestedClass()}. + * + * @param classname a fully-qualified class name. + * @return the nested class. + */ + synchronized CtClass makeNestedClass(String classname) { + checkNotFrozen(classname); + CtClass clazz = new CtNewNestedClass(classname, this, false, null); + cacheCtClass(classname, clazz, true); + return clazz; + } + + /** + * Creates a new public interface. + * If there already exists a class/interface with the same name, + * the new interface overwrites that previous one. + * + * @param name a fully-qualified interface name. + * @throws RuntimeException if the existing interface is frozen. + */ + public CtClass makeInterface(String name) throws RuntimeException { + return makeInterface(name, null); + } + + /** + * Creates a new public interface. + * If there already exists a class/interface with the same name, + * the new interface overwrites that previous one. + * + * @param name a fully-qualified interface name. + * @param superclass the super interface. + * @throws RuntimeException if the existing interface is frozen. + */ + public synchronized CtClass makeInterface(String name, CtClass superclass) + throws RuntimeException + { + checkNotFrozen(name); + CtClass clazz = new CtNewClass(name, this, true, superclass); + cacheCtClass(name, clazz, true); + return clazz; + } + + /** + * Creates a new annotation. + * If there already exists a class/interface with the same name, + * the new interface overwrites that previous one. + * + * @param name a fully-qualified interface name. + * Or null if the annotation has no super interface. + * @throws RuntimeException if the existing interface is frozen. + * @since 3.19 + */ + public CtClass makeAnnotation(String name) throws RuntimeException { + try { + CtClass cc = makeInterface(name, get("java.lang.annotation.Annotation")); + cc.setModifiers(cc.getModifiers() | Modifier.ANNOTATION); + return cc; + } + catch (NotFoundException e) { + // should never happen. + throw new RuntimeException(e.getMessage(), e); + } + } + + /** + * Appends the system search path to the end of the + * search path. The system search path + * usually includes the platform library, extension + * libraries, and the search path specified by the + * -classpath option or the CLASSPATH + * environment variable. + * + * @return the appended class path. + */ + public ClassPath appendSystemPath() { + return source.appendSystemPath(); + } + + /** + * Insert a ClassPath object at the head of the + * search path. + * + * @return the inserted class path. + * @see javassist.ClassPath + * @see javassist.URLClassPath + * @see javassist.ByteArrayClassPath + */ + public ClassPath insertClassPath(ClassPath cp) { + return source.insertClassPath(cp); + } + + /** + * Appends a ClassPath object to the end of the + * search path. + * + * @return the appended class path. + * @see javassist.ClassPath + * @see javassist.URLClassPath + * @see javassist.ByteArrayClassPath + */ + public ClassPath appendClassPath(ClassPath cp) { + return source.appendClassPath(cp); + } + + /** + * Inserts a directory or a jar (or zip) file at the head of the + * search path. + * + * @param pathname the path name of the directory or jar file. + * It must not end with a path separator ("/"). + * If the path name ends with "/*", then all the + * jar files matching the path name are inserted. + * + * @return the inserted class path. + * @throws NotFoundException if the jar file is not found. + */ + public ClassPath insertClassPath(String pathname) + throws NotFoundException + { + return source.insertClassPath(pathname); + } + + /** + * Appends a directory or a jar (or zip) file to the end of the + * search path. + * + * @param pathname the path name of the directory or jar file. + * It must not end with a path separator ("/"). + * If the path name ends with "/*", then all the + * jar files matching the path name are appended. + * + * @return the appended class path. + * @throws NotFoundException if the jar file is not found. + */ + public ClassPath appendClassPath(String pathname) + throws NotFoundException + { + return source.appendClassPath(pathname); + } + + /** + * Detatches the ClassPath object from the search path. + * The detached ClassPath object cannot be added + * to the path again. + */ + public void removeClassPath(ClassPath cp) { + source.removeClassPath(cp); + } + + /** + * Appends directories and jar files for search. + * + *

The elements of the given path list must be separated by colons + * in Unix or semi-colons in Windows. + * + * @param pathlist a (semi)colon-separated list of + * the path names of directories and jar files. + * The directory name must not end with a path + * separator ("/"). + * @throws NotFoundException if a jar file is not found. + */ + public void appendPathList(String pathlist) throws NotFoundException { + char sep = File.pathSeparatorChar; + int i = 0; + for (;;) { + int j = pathlist.indexOf(sep, i); + if (j < 0) { + appendClassPath(pathlist.substring(i)); + break; + } + else { + appendClassPath(pathlist.substring(i, j)); + i = j + 1; + } + } + } + + /** + * Converts the given class to a java.lang.Class object. + * Once this method is called, further modifications are not + * allowed any more. + * To load the class, this method uses the context class loader + * of the current thread. It is obtained by calling + * getClassLoader(). + * + *

This behavior can be changed by subclassing the pool and changing + * the getClassLoader() method. + * If the program is running on some application + * server, the context class loader might be inappropriate to load the + * class. + * + *

This method is provided for convenience. If you need more + * complex functionality, you should write your own class loader. + * + *

Warining: A Class object returned by this method may not + * work with a security manager or a signed jar file because a + * protection domain is not specified. + * + * @see #toClass(CtClass, java.lang.ClassLoader, ProtectionDomain) + * @see #getClassLoader() + */ + public Class toClass(CtClass clazz) throws CannotCompileException { + // Some subclasses of ClassPool may override toClass(CtClass,ClassLoader). + // So we should call that method instead of toClass(.., ProtectionDomain). + return toClass(clazz, getClassLoader()); + } + + /** + * Get the classloader for toClass(), getAnnotations() in + * CtClass, etc. + * + *

The default is the context class loader. + * + * @return the classloader for the pool + * @see #toClass(CtClass) + * @see CtClass#getAnnotations() + */ + public ClassLoader getClassLoader() { + return getContextClassLoader(); + } + + /** + * Obtains a class loader that seems appropriate to look up a class + * by name. + */ + static ClassLoader getContextClassLoader() { + return Thread.currentThread().getContextClassLoader(); + } + + /** + * Converts the class to a java.lang.Class object. + * Do not override this method any more at a subclass because + * toClass(CtClass) never calls this method. + * + *

Warining: A Class object returned by this method may not + * work with a security manager or a signed jar file because a + * protection domain is not specified. + * + * @deprecated Replaced by {@link #toClass(CtClass,ClassLoader,ProtectionDomain)}. + * A subclass of ClassPool that has been + * overriding this method should be modified. It should override + * {@link #toClass(CtClass,ClassLoader,ProtectionDomain)}. + */ + public Class toClass(CtClass ct, ClassLoader loader) + throws CannotCompileException + { + return toClass(ct, loader, null); + } + + /** + * Converts the class to a java.lang.Class object. + * Once this method is called, further modifications are not allowed + * any more. + * + *

The class file represented by the given CtClass is + * loaded by the given class loader to construct a + * java.lang.Class object. Since a private method + * on the class loader is invoked through the reflection API, + * the caller must have permissions to do that. + * + *

An easy way to obtain ProtectionDomain object is + * to call getProtectionDomain() + * in java.lang.Class. It returns the domain that the + * class belongs to. + * + *

This method is provided for convenience. If you need more + * complex functionality, you should write your own class loader. + * + * @param loader the class loader used to load this class. + * For example, the loader returned by + * getClassLoader() can be used + * for this parameter. + * @param domain the protection domain for the class. + * If it is null, the default domain created + * by java.lang.ClassLoader is used. + * + * @see #getClassLoader() + * @since 3.3 + */ + public Class toClass(CtClass ct, ClassLoader loader, ProtectionDomain domain) + throws CannotCompileException + { + try { + byte[] b = ct.toBytecode(); + java.lang.reflect.Method method; + Object[] args; + if (domain == null) { + method = defineClass1; + args = new Object[] { ct.getName(), b, new Integer(0), + new Integer(b.length)}; + } + else { + method = defineClass2; + args = new Object[] { ct.getName(), b, new Integer(0), + new Integer(b.length), domain}; + } + + return (Class)toClass2(method, loader, args); + } + catch (RuntimeException e) { + throw e; + } + catch (java.lang.reflect.InvocationTargetException e) { + throw new CannotCompileException(e.getTargetException()); + } + catch (Exception e) { + throw new CannotCompileException(e); + } + } + + private static synchronized Object toClass2(Method method, + ClassLoader loader, Object[] args) + throws Exception + { + method.setAccessible(true); + try { + return method.invoke(loader, args); + } + finally { + method.setAccessible(false); + } + } + + /** + * Defines a new package. If the package is already defined, this method + * performs nothing. + * + *

You do not necessarily need to + * call this method. If this method is called, then + * getPackage() on the Class object returned + * by toClass() will return a non-null object. + * + * @param loader the class loader passed to toClass() or + * the default one obtained by getClassLoader(). + * @param name the package name. + * @see #getClassLoader() + * @see #toClass(CtClass) + * @see CtClass#toClass() + * @since 3.16 + */ + public void makePackage(ClassLoader loader, String name) + throws CannotCompileException + { + Object[] args = new Object[] { + name, null, null, null, null, null, null, null }; + Throwable t; + try { + toClass2(definePackage, loader, args); + return; + } + catch (java.lang.reflect.InvocationTargetException e) { + t = e.getTargetException(); + if (t == null) + t = e; + else if (t instanceof IllegalArgumentException) { + // if the package is already defined, an IllegalArgumentException + // is thrown. + return; + } + } + catch (Exception e) { + t = e; + } + + throw new CannotCompileException(t); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java b/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java new file mode 100644 index 0000000..638d201 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java @@ -0,0 +1,430 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.*; +import java.util.jar.*; +import java.net.MalformedURLException; +import java.net.URL; +import java.util.Hashtable; + +final class ClassPathList { + ClassPathList next; + ClassPath path; + + ClassPathList(ClassPath p, ClassPathList n) { + next = n; + path = p; + } +} + +final class DirClassPath implements ClassPath { + String directory; + + DirClassPath(String dirName) { + directory = dirName; + } + + public InputStream openClassfile(String classname) { + try { + char sep = File.separatorChar; + String filename = directory + sep + + classname.replace('.', sep) + ".class"; + return new FileInputStream(filename.toString()); + } + catch (FileNotFoundException e) {} + catch (SecurityException e) {} + return null; + } + + public URL find(String classname) { + char sep = File.separatorChar; + String filename = directory + sep + + classname.replace('.', sep) + ".class"; + File f = new File(filename); + if (f.exists()) + try { + return f.getCanonicalFile().toURI().toURL(); + } + catch (MalformedURLException e) {} + catch (IOException e) {} + + return null; + } + + public void close() {} + + public String toString() { + return directory; + } +} + +final class JarDirClassPath implements ClassPath { + JarClassPath[] jars; + + JarDirClassPath(String dirName) throws NotFoundException { + File[] files = new File(dirName).listFiles(new FilenameFilter() { + public boolean accept(File dir, String name) { + name = name.toLowerCase(); + return name.endsWith(".jar") || name.endsWith(".zip"); + } + }); + + if (files != null) { + jars = new JarClassPath[files.length]; + for (int i = 0; i < files.length; i++) + jars[i] = new JarClassPath(files[i].getPath()); + } + } + + public InputStream openClassfile(String classname) throws NotFoundException { + if (jars != null) + for (int i = 0; i < jars.length; i++) { + InputStream is = jars[i].openClassfile(classname); + if (is != null) + return is; + } + + return null; // not found + } + + public URL find(String classname) { + if (jars != null) + for (int i = 0; i < jars.length; i++) { + URL url = jars[i].find(classname); + if (url != null) + return url; + } + + return null; // not found + } + + public void close() { + if (jars != null) + for (int i = 0; i < jars.length; i++) + jars[i].close(); + } +} + +final class JarClassPath implements ClassPath { + JarFile jarfile; + String jarfileURL; + + JarClassPath(String pathname) throws NotFoundException { + try { + jarfile = new JarFile(pathname); + jarfileURL = new File(pathname).getCanonicalFile() + .toURI().toURL().toString(); + return; + } + catch (IOException e) {} + throw new NotFoundException(pathname); + } + + public InputStream openClassfile(String classname) + throws NotFoundException + { + try { + String jarname = classname.replace('.', '/') + ".class"; + JarEntry je = jarfile.getJarEntry(jarname); + if (je != null) + return jarfile.getInputStream(je); + else + return null; // not found + } + catch (IOException e) {} + throw new NotFoundException("broken jar file?: " + + jarfile.getName()); + } + + public URL find(String classname) { + String jarname = classname.replace('.', '/') + ".class"; + JarEntry je = jarfile.getJarEntry(jarname); + if (je != null) + try { + return new URL("jar:" + jarfileURL + "!/" + jarname); + } + catch (MalformedURLException e) {} + + return null; // not found + } + + public void close() { + try { + jarfile.close(); + jarfile = null; + } + catch (IOException e) {} + } + + public String toString() { + return jarfile == null ? "" : jarfile.toString(); + } +} + +final class ClassPoolTail { + protected ClassPathList pathList; + + public ClassPoolTail() { + pathList = null; + } + + public String toString() { + StringBuffer buf = new StringBuffer(); + buf.append("[class path: "); + ClassPathList list = pathList; + while (list != null) { + buf.append(list.path.toString()); + buf.append(File.pathSeparatorChar); + list = list.next; + } + + buf.append(']'); + return buf.toString(); + } + + public synchronized ClassPath insertClassPath(ClassPath cp) { + pathList = new ClassPathList(cp, pathList); + return cp; + } + + public synchronized ClassPath appendClassPath(ClassPath cp) { + ClassPathList tail = new ClassPathList(cp, null); + ClassPathList list = pathList; + if (list == null) + pathList = tail; + else { + while (list.next != null) + list = list.next; + + list.next = tail; + } + + return cp; + } + + public synchronized void removeClassPath(ClassPath cp) { + ClassPathList list = pathList; + if (list != null) + if (list.path == cp) + pathList = list.next; + else { + while (list.next != null) + if (list.next.path == cp) + list.next = list.next.next; + else + list = list.next; + } + + cp.close(); + } + + public ClassPath appendSystemPath() { + return appendClassPath(new ClassClassPath()); + } + + public ClassPath insertClassPath(String pathname) + throws NotFoundException + { + return insertClassPath(makePathObject(pathname)); + } + + public ClassPath appendClassPath(String pathname) + throws NotFoundException + { + return appendClassPath(makePathObject(pathname)); + } + + private static ClassPath makePathObject(String pathname) + throws NotFoundException + { + String lower = pathname.toLowerCase(); + if (lower.endsWith(".jar") || lower.endsWith(".zip")) + return new JarClassPath(pathname); + + int len = pathname.length(); + if (len > 2 && pathname.charAt(len - 1) == '*' + && (pathname.charAt(len - 2) == '/' + || pathname.charAt(len - 2) == File.separatorChar)) { + String dir = pathname.substring(0, len - 2); + return new JarDirClassPath(dir); + } + + return new DirClassPath(pathname); + } + + /** + * This method does not close the output stream. + */ + void writeClassfile(String classname, OutputStream out) + throws NotFoundException, IOException, CannotCompileException + { + InputStream fin = openClassfile(classname); + if (fin == null) + throw new NotFoundException(classname); + + try { + copyStream(fin, out); + } + finally { + fin.close(); + } + } + + /* + -- faster version -- + void checkClassName(String classname) throws NotFoundException { + if (find(classname) == null) + throw new NotFoundException(classname); + } + + -- slower version -- + + void checkClassName(String classname) throws NotFoundException { + InputStream fin = openClassfile(classname); + try { + fin.close(); + } + catch (IOException e) {} + } + */ + + + /** + * Opens the class file for the class specified by + * classname. + * + * @param classname a fully-qualified class name + * @return null if the file has not been found. + * @throws NotFoundException if any error is reported by ClassPath. + */ + InputStream openClassfile(String classname) + throws NotFoundException + { + ClassPathList list = pathList; + InputStream ins = null; + NotFoundException error = null; + while (list != null) { + try { + ins = list.path.openClassfile(classname); + } + catch (NotFoundException e) { + if (error == null) + error = e; + } + + if (ins == null) + list = list.next; + else + return ins; + } + + if (error != null) + throw error; + else + return null; // not found + } + + /** + * Searches the class path to obtain the URL of the class file + * specified by classname. It is also used to determine whether + * the class file exists. + * + * @param classname a fully-qualified class name. + * @return null if the class file could not be found. + */ + public URL find(String classname) { + ClassPathList list = pathList; + URL url = null; + while (list != null) { + url = list.path.find(classname); + if (url == null) + list = list.next; + else + return url; + } + + return null; + } + + /** + * Reads from an input stream until it reaches the end. + * + * @return the contents of that input stream + */ + public static byte[] readStream(InputStream fin) throws IOException { + byte[][] bufs = new byte[8][]; + int bufsize = 4096; + + for (int i = 0; i < 8; ++i) { + bufs[i] = new byte[bufsize]; + int size = 0; + int len = 0; + do { + len = fin.read(bufs[i], size, bufsize - size); + if (len >= 0) + size += len; + else { + byte[] result = new byte[bufsize - 4096 + size]; + int s = 0; + for (int j = 0; j < i; ++j) { + System.arraycopy(bufs[j], 0, result, s, s + 4096); + s = s + s + 4096; + } + + System.arraycopy(bufs[i], 0, result, s, size); + return result; + } + } while (size < bufsize); + bufsize *= 2; + } + + throw new IOException("too much data"); + } + + /** + * Reads from an input stream and write to an output stream + * until it reaches the end. This method does not close the + * streams. + */ + public static void copyStream(InputStream fin, OutputStream fout) + throws IOException + { + int bufsize = 4096; + byte[] buf = null; + for (int i = 0; i < 64; ++i) { + if (i < 8) { + bufsize *= 2; + buf = new byte[bufsize]; + } + int size = 0; + int len = 0; + do { + len = fin.read(buf, size, bufsize - size); + if (len >= 0) + size += len; + else { + fout.write(buf, 0, size); + return; + } + } while (size < bufsize); + fout.write(buf); + } + + throw new IOException("too much data"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java b/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java new file mode 100644 index 0000000..5bd3014 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java @@ -0,0 +1,809 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.convert.*; + +/** + * Simple translator of method bodies + * (also see the javassist.expr package). + * + *

Instances of this class specifies how to instrument of the + * bytecodes representing a method body. They are passed to + * CtClass.instrument() or + * CtMethod.instrument() as a parameter. + * + *

Example: + * 

+ * ClassPool cp = ClassPool.getDefault();
+ * CtClass point = cp.get("Point");
+ * CtClass singleton = cp.get("Singleton");
+ * CtClass client = cp.get("Client");
+ * CodeConverter conv = new CodeConverter();
+ * conv.replaceNew(point, singleton, "makePoint");
+ * client.instrument(conv);
+ *
+ * + *

This program substitutes "Singleton.makePoint()" + * for all occurrences of "new Point()" + * appearing in methods declared in a Client class. + * + * @see javassist.CtClass#instrument(CodeConverter) + * @see javassist.CtMethod#instrument(CodeConverter) + * @see javassist.expr.ExprEditor + */ +public class CodeConverter { + protected Transformer transformers = null; + + /** + * Modify a method body so that instantiation of the specified class + * is replaced with a call to the specified static method. For example, + * replaceNew(ctPoint, ctSingleton, "createPoint") + * (where ctPoint and ctSingleton are + * compile-time classes for class Point and class + * Singleton, respectively) + * replaces all occurrences of: + * + * 

new Point(x, y)
+ * + * in the method body with: + * + * 
Singleton.createPoint(x, y)
+ * + *

This enables to intercept instantiation of Point + * and change the samentics. For example, the following + * createPoint() implements the singleton pattern: + * + * 

public static Point createPoint(int x, int y) {
+     *     if (aPoint == null)
+     *         aPoint = new Point(x, y);
+     *     return aPoint;
+     * }
+     *
+ * + *

The static method call substituted for the original new + * expression must be + * able to receive the same set of parameters as the original + * constructor. If there are multiple constructors with different + * parameter types, then there must be multiple static methods + * with the same name but different parameter types. + * + *

The return type of the substituted static method must be + * the exactly same as the type of the instantiated class specified by + * newClass. + * + * @param newClass the instantiated class. + * @param calledClass the class in which the static method is + * declared. + * @param calledMethod the name of the static method. + */ + public void replaceNew(CtClass newClass, + CtClass calledClass, String calledMethod) { + transformers = new TransformNew(transformers, newClass.getName(), + calledClass.getName(), calledMethod); + } + + /** + * Modify a method body so that instantiation of the class + * specified by oldClass + * is replaced with instantiation of another class newClass. + * For example, + * replaceNew(ctPoint, ctPoint2) + * (where ctPoint and ctPoint2 are + * compile-time classes for class Point and class + * Point2, respectively) + * replaces all occurrences of: + * + * 

new Point(x, y)
+ * + * in the method body with: + * + * 
new Point2(x, y)
+ * + *

Note that Point2 must be type-compatible with Point. + * It must have the same set of methods, fields, and constructors as the + * replaced class. + */ + public void replaceNew(CtClass oldClass, CtClass newClass) { + transformers = new TransformNewClass(transformers, oldClass.getName(), + newClass.getName()); + } + + /** + * Modify a method body so that field read/write expressions access + * a different field from the original one. + * + *

Note that this method changes only the filed name and the class + * declaring the field; the type of the target object does not change. + * Therefore, the substituted field must be declared in the same class + * or a superclass of the original class. + * + *

Also, clazz and newClass must specify + * the class directly declaring the field. They must not specify + * a subclass of that class. + * + * @param field the originally accessed field. + * @param newClass the class declaring the substituted field. + * @param newFieldname the name of the substituted field. + */ + public void redirectFieldAccess(CtField field, + CtClass newClass, String newFieldname) { + transformers = new TransformFieldAccess(transformers, field, + newClass.getName(), + newFieldname); + } + + /** + * Modify a method body so that an expression reading the specified + * field is replaced with a call to the specified static method. + * This static method receives the target object of the original + * read expression as a parameter. It must return a value of + * the same type as the field. + * + *

For example, the program below + * + * 

Point p = new Point();
+     * int newX = p.x + 3;
+ * + *

can be translated into: + * + * 

Point p = new Point();
+     * int newX = Accessor.readX(p) + 3;
+ * + *

where + * + * 

public class Accessor {
+     *     public static int readX(Object target) { ... }
+     * }
+ * + *

The type of the parameter of readX() must + * be java.lang.Object independently of the actual + * type of target. The return type must be the same + * as the field type. + * + * @param field the field. + * @param calledClass the class in which the static method is + * declared. + * @param calledMethod the name of the static method. + */ + public void replaceFieldRead(CtField field, + CtClass calledClass, String calledMethod) { + transformers = new TransformReadField(transformers, field, + calledClass.getName(), + calledMethod); + } + + /** + * Modify a method body so that an expression writing the specified + * field is replaced with a call to the specified static method. + * This static method receives two parameters: the target object of + * the original + * write expression and the assigned value. The return type of the + * static method is void. + * + *

For example, the program below + * + * 

Point p = new Point();
+     * p.x = 3;
+ * + *

can be translated into: + * + * 

Point p = new Point();
+     * Accessor.writeX(3);
+ * + *

where + * + * 

public class Accessor {
+     *     public static void writeX(Object target, int value) { ... }
+     * }
+ * + *

The type of the first parameter of writeX() must + * be java.lang.Object independently of the actual + * type of target. The type of the second parameter + * is the same as the field type. + * + * @param field the field. + * @param calledClass the class in which the static method is + * declared. + * @param calledMethod the name of the static method. + */ + public void replaceFieldWrite(CtField field, + CtClass calledClass, String calledMethod) { + transformers = new TransformWriteField(transformers, field, + calledClass.getName(), + calledMethod); + } + + /** + * Modify a method body, so that ALL accesses to an array are replaced with + * calls to static methods within another class. In the case of reading an + * element from the array, this is replaced with a call to a static method with + * the array and the index as arguments, the return value is the value read from + * the array. If writing to an array, this is replaced with a call to a static + * method with the array, index and new value as parameters, the return value of + * the static method is void. + * + *

The calledClass parameter is the class containing the static methods to be used + * for array replacement. The names parameter points to an implementation of + * ArrayAccessReplacementMethodNames which specifies the names of the method to be + * used for access for each type of array. For example reading from an int[] will + * require a different method than if writing to an int[], and writing to a long[] + * will require a different method than if writing to a byte[]. If the implementation + * of ArrayAccessReplacementMethodNames does not contain the name for access for a + * type of array, that access is not replaced. + * + *

A default implementation of ArrayAccessReplacementMethodNames called + * DefaultArrayAccessReplacementMethodNames has been provided and is what is used in the + * following example. This also assumes that 'foo.ArrayAdvisor' is the name of the + * CtClass passed in. + * + *

If we have the following class: + * 

class POJO{
+     *    int[] ints = new int[]{1, 2, 3, 4, 5};
+     *    long[] longs = new int[]{10, 20, 30};
+     *    Object objects = new Object[]{true, false};
+     *    Integer[] integers = new Integer[]{new Integer(10)};
+     * }
+     *
+ * and this is accessed as: + * 
POJO p = new POJO();
+     * 
+     * //Write to int array
+     * p.ints[2] = 7;
+     * 
+     * //Read from int array
+     * int i = p.ints[2];
+     * 
+     * //Write to long array
+     * p.longs[2] = 1000L;
+     * 
+     * //Read from long array
+     * long l = p.longs[2];
+     * 
+     * //Write to Object array
+     * p.objects[2] = "Hello";
+     * 
+     * //Read from Object array
+     * Object o = p.objects[2];
+     * 
+     * //Write to Integer array
+     * Integer integer = new Integer(5);
+     * p.integers[0] = integer;
+     * 
+     * //Read from Object array
+     * integer = p.integers[0];
+     *
+ * + * Following instrumentation we will have + * 
POJO p = new POJO();
+     * 
+     * //Write to int array
+     * ArrayAdvisor.arrayWriteInt(p.ints, 2, 7);
+     * 
+     * //Read from int array
+     * int i = ArrayAdvisor.arrayReadInt(p.ints, 2);
+     * 
+     * //Write to long array
+     * ArrayAdvisor.arrayWriteLong(p.longs, 2, 1000L);
+     * 
+     * //Read from long array
+     * long l = ArrayAdvisor.arrayReadLong(p.longs, 2);
+     * 
+     * //Write to Object array
+     * ArrayAdvisor.arrayWriteObject(p.objects, 2, "Hello");
+     * 
+     * //Read from Object array
+     * Object o = ArrayAdvisor.arrayReadObject(p.objects, 2);
+     * 
+     * //Write to Integer array
+     * Integer integer = new Integer(5);
+     * ArrayAdvisor.arrayWriteObject(p.integers, 0, integer);
+     * 
+     * //Read from Object array
+     * integer = ArrayAdvisor.arrayWriteObject(p.integers, 0);
+     *
+ * + * @see DefaultArrayAccessReplacementMethodNames + * + * @param calledClass the class containing the static methods. + * @param names contains the names of the methods to replace + * the different kinds of array access with. + */ + public void replaceArrayAccess(CtClass calledClass, ArrayAccessReplacementMethodNames names) + throws NotFoundException + { + transformers = new TransformAccessArrayField(transformers, calledClass.getName(), names); + } + + /** + * Modify method invocations in a method body so that a different + * method will be invoked. + * + *

Note that the target object, the parameters, or + * the type of invocation + * (static method call, interface call, or private method call) + * are not modified. Only the method name is changed. The substituted + * method must have the same signature that the original one has. + * If the original method is a static method, the substituted method + * must be static. + * + * @param origMethod original method + * @param substMethod substituted method + */ + public void redirectMethodCall(CtMethod origMethod, + CtMethod substMethod) + throws CannotCompileException + { + String d1 = origMethod.getMethodInfo2().getDescriptor(); + String d2 = substMethod.getMethodInfo2().getDescriptor(); + if (!d1.equals(d2)) + throw new CannotCompileException("signature mismatch: " + + substMethod.getLongName()); + + int mod1 = origMethod.getModifiers(); + int mod2 = substMethod.getModifiers(); + if (Modifier.isStatic(mod1) != Modifier.isStatic(mod2) + || (Modifier.isPrivate(mod1) && !Modifier.isPrivate(mod2)) + || origMethod.getDeclaringClass().isInterface() + != substMethod.getDeclaringClass().isInterface()) + throw new CannotCompileException("invoke-type mismatch " + + substMethod.getLongName()); + + transformers = new TransformCall(transformers, origMethod, + substMethod); + } + + /** + * Correct invocations to a method that has been renamed. + * If a method is renamed, calls to that method must be also + * modified so that the method with the new name will be called. + * + *

The method must be declared in the same class before and + * after it is renamed. + * + *

Note that the target object, the parameters, or + * the type of invocation + * (static method call, interface call, or private method call) + * are not modified. Only the method name is changed. + * + * @param oldMethodName the old name of the method. + * @param newMethod the method with the new name. + * @see javassist.CtMethod#setName(String) + */ + public void redirectMethodCall(String oldMethodName, + CtMethod newMethod) + throws CannotCompileException + { + transformers + = new TransformCall(transformers, oldMethodName, newMethod); + } + + /** + * Insert a call to another method before an existing method call. + * That "before" method must be static. The return type must be + * void. As parameters, the before method receives + * the target object and all the parameters to the originally invoked + * method. For example, if the originally invoked method is + * move(): + * + * 

class Point {
+     *     Point move(int x, int y) { ... }
+     * }
+ * + *

Then the before method must be something like this: + * + * 

class Verbose {
+     *     static void print(Point target, int x, int y) { ... }
+     * }
+ * + *

The CodeConverter would translate bytecode + * equivalent to: + * + * 

Point p2 = p.move(x + y, 0);
+ * + *

into the bytecode equivalent to: + * + * 

int tmp1 = x + y;
+     * int tmp2 = 0;
+     * Verbose.print(p, tmp1, tmp2);
+     * Point p2 = p.move(tmp1, tmp2);
+ * + * @param origMethod the method originally invoked. + * @param beforeMethod the method invoked before + * origMethod. + */ + public void insertBeforeMethod(CtMethod origMethod, + CtMethod beforeMethod) + throws CannotCompileException + { + try { + transformers = new TransformBefore(transformers, origMethod, + beforeMethod); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + /** + * Inserts a call to another method after an existing method call. + * That "after" method must be static. The return type must be + * void. As parameters, the after method receives + * the target object and all the parameters to the originally invoked + * method. For example, if the originally invoked method is + * move(): + * + * 
class Point {
+     *     Point move(int x, int y) { ... }
+     * }
+ * + *

Then the after method must be something like this: + * + * 

class Verbose {
+     *     static void print(Point target, int x, int y) { ... }
+     * }
+ * + *

The CodeConverter would translate bytecode + * equivalent to: + * + * 

Point p2 = p.move(x + y, 0);
+ * + *

into the bytecode equivalent to: + * + * 

+     * int tmp1 = x + y;
+     * int tmp2 = 0;
+     * Point p2 = p.move(tmp1, tmp2);
+     * Verbose.print(p, tmp1, tmp2);
+ * + * @param origMethod the method originally invoked. + * @param afterMethod the method invoked after + * origMethod. + */ + public void insertAfterMethod(CtMethod origMethod, + CtMethod afterMethod) + throws CannotCompileException + { + try { + transformers = new TransformAfter(transformers, origMethod, + afterMethod); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + /** + * Performs code conversion. + */ + protected void doit(CtClass clazz, MethodInfo minfo, ConstPool cp) + throws CannotCompileException + { + Transformer t; + CodeAttribute codeAttr = minfo.getCodeAttribute(); + if (codeAttr == null || transformers == null) + return; + for (t = transformers; t != null; t = t.getNext()) + t.initialize(cp, clazz, minfo); + + CodeIterator iterator = codeAttr.iterator(); + while (iterator.hasNext()) { + try { + int pos = iterator.next(); + for (t = transformers; t != null; t = t.getNext()) + pos = t.transform(clazz, pos, iterator, cp); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + int locals = 0; + int stack = 0; + for (t = transformers; t != null; t = t.getNext()) { + int s = t.extraLocals(); + if (s > locals) + locals = s; + + s = t.extraStack(); + if (s > stack) + stack = s; + } + + for (t = transformers; t != null; t = t.getNext()) + t.clean(); + + if (locals > 0) + codeAttr.setMaxLocals(codeAttr.getMaxLocals() + locals); + + if (stack > 0) + codeAttr.setMaxStack(codeAttr.getMaxStack() + stack); + + try { + minfo.rebuildStackMapIf6(clazz.getClassPool(), + clazz.getClassFile2()); + } + catch (BadBytecode b) { + throw new CannotCompileException(b.getMessage(), b); + } + } + + /** + * Interface containing the method names to be used + * as array access replacements. + * + * @author Kabir Khan + * @version $Revision: 1.16 $ + */ + public interface ArrayAccessReplacementMethodNames + { + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)B to replace reading from a byte[]. + */ + String byteOrBooleanRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;IB)V to replace writing to a byte[]. + */ + String byteOrBooleanWrite(); + + /** + * @return the name of a static method with the signature + * (Ljava/lang/Object;I)C to replace reading from a char[]. + */ + String charRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;IC)V to replace writing to a byte[]. + */ + String charWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)D to replace reading from a double[]. + */ + String doubleRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;ID)V to replace writing to a double[]. + */ + String doubleWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)F to replace reading from a float[]. + */ + String floatRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;IF)V to replace writing to a float[]. + */ + String floatWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)I to replace reading from a int[]. + */ + String intRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;II)V to replace writing to a int[]. + */ + String intWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)J to replace reading from a long[]. + */ + String longRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;IJ)V to replace writing to a long[]. + */ + String longWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)Ljava/lang/Object; + * to replace reading from a Object[] (or any subclass of object). + */ + String objectRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;ILjava/lang/Object;)V + * to replace writing to a Object[] (or any subclass of object). + */ + String objectWrite(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;I)S to replace reading from a short[]. + */ + String shortRead(); + + /** + * Returns the name of a static method with the signature + * (Ljava/lang/Object;IS)V to replace writing to a short[]. + */ + String shortWrite(); + } + + /** + * Default implementation of the ArrayAccessReplacementMethodNames + * interface giving default values for method names to be used for replacing + * accesses to array elements. + * + * @author Kabir Khan + * @version $Revision: 1.16 $ + */ + public static class DefaultArrayAccessReplacementMethodNames + implements ArrayAccessReplacementMethodNames + { + /** + * Returns "arrayReadByteOrBoolean" as the name of the static method with the signature + * (Ljava/lang/Object;I)B to replace reading from a byte[]. + */ + public String byteOrBooleanRead() + { + return "arrayReadByteOrBoolean"; + } + + /** + * Returns "arrayWriteByteOrBoolean" as the name of the static method with the signature + * (Ljava/lang/Object;IB)V to replace writing to a byte[]. + */ + public String byteOrBooleanWrite() + { + return "arrayWriteByteOrBoolean"; + } + + /** + * Returns "arrayReadChar" as the name of the static method with the signature + * (Ljava/lang/Object;I)C to replace reading from a char[]. + */ + public String charRead() + { + return "arrayReadChar"; + } + + /** + * Returns "arrayWriteChar" as the name of the static method with the signature + * (Ljava/lang/Object;IC)V to replace writing to a byte[]. + */ + public String charWrite() + { + return "arrayWriteChar"; + } + + /** + * Returns "arrayReadDouble" as the name of the static method with the signature + * (Ljava/lang/Object;I)D to replace reading from a double[]. + */ + public String doubleRead() + { + return "arrayReadDouble"; + } + + /** + * Returns "arrayWriteDouble" as the name of the static method with the signature + * (Ljava/lang/Object;ID)V to replace writing to a double[]. + */ + public String doubleWrite() + { + return "arrayWriteDouble"; + } + + /** + * Returns "arrayReadFloat" as the name of the static method with the signature + * (Ljava/lang/Object;I)F to replace reading from a float[]. + */ + public String floatRead() + { + return "arrayReadFloat"; + } + + /** + * Returns "arrayWriteFloat" as the name of the static method with the signature + * (Ljava/lang/Object;IF)V to replace writing to a float[]. + */ + public String floatWrite() + { + return "arrayWriteFloat"; + } + + /** + * Returns "arrayReadInt" as the name of the static method with the signature + * (Ljava/lang/Object;I)I to replace reading from a int[]. + */ + public String intRead() + { + return "arrayReadInt"; + } + + /** + * Returns "arrayWriteInt" as the name of the static method with the signature + * (Ljava/lang/Object;II)V to replace writing to a int[]. + */ + public String intWrite() + { + return "arrayWriteInt"; + } + + /** + * Returns "arrayReadLong" as the name of the static method with the signature + * (Ljava/lang/Object;I)J to replace reading from a long[]. + */ + public String longRead() + { + return "arrayReadLong"; + } + + /** + * Returns "arrayWriteLong" as the name of the static method with the signature + * (Ljava/lang/Object;IJ)V to replace writing to a long[]. + */ + public String longWrite() + { + return "arrayWriteLong"; + } + + /** + * Returns "arrayReadObject" as the name of the static method with the signature + * (Ljava/lang/Object;I)Ljava/lang/Object; to replace reading from a Object[] (or any subclass of object). + */ + public String objectRead() + { + return "arrayReadObject"; + } + + /** + * Returns "arrayWriteObject" as the name of the static method with the signature + * (Ljava/lang/Object;ILjava/lang/Object;)V to replace writing to a Object[] (or any subclass of object). + */ + public String objectWrite() + { + return "arrayWriteObject"; + } + + /** + * Returns "arrayReadShort" as the name of the static method with the signature + * (Ljava/lang/Object;I)S to replace reading from a short[]. + */ + public String shortRead() + { + return "arrayReadShort"; + } + + /** + * Returns "arrayWriteShort" as the name of the static method with the signature + * (Ljava/lang/Object;IS)V to replace writing to a short[]. + */ + public String shortWrite() + { + return "arrayWriteShort"; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtArray.java b/src/main/java/com/wenshuo/agent/javassist/CtArray.java new file mode 100644 index 0000000..3864c6a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtArray.java @@ -0,0 +1,113 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +/** + * Array types. + */ +final class CtArray extends CtClass { + protected ClassPool pool; + + // the name of array type ends with "[]". + CtArray(String name, ClassPool cp) { + super(name); + pool = cp; + } + + public ClassPool getClassPool() { + return pool; + } + + public boolean isArray() { + return true; + } + + private CtClass[] interfaces = null; + + public int getModifiers() { + int mod = Modifier.FINAL; + try { + mod |= getComponentType().getModifiers() + & (Modifier.PROTECTED | Modifier.PUBLIC | Modifier.PRIVATE); + } + catch (NotFoundException e) {} + return mod; + } + + public CtClass[] getInterfaces() throws NotFoundException { + if (interfaces == null) { + Class[] intfs = Object[].class.getInterfaces(); + // java.lang.Cloneable and java.io.Serializable. + // If the JVM is CLDC, intfs is empty. + interfaces = new CtClass[intfs.length]; + for (int i = 0; i < intfs.length; i++) + interfaces[i] = pool.get(intfs[i].getName()); + } + + return interfaces; + } + + public boolean subtypeOf(CtClass clazz) throws NotFoundException { + if (super.subtypeOf(clazz)) + return true; + + String cname = clazz.getName(); + if (cname.equals(javaLangObject)) + return true; + + CtClass[] intfs = getInterfaces(); + for (int i = 0; i < intfs.length; i++) + if (intfs[i].subtypeOf(clazz)) + return true; + + return clazz.isArray() + && getComponentType().subtypeOf(clazz.getComponentType()); + } + + public CtClass getComponentType() throws NotFoundException { + String name = getName(); + return pool.get(name.substring(0, name.length() - 2)); + } + + public CtClass getSuperclass() throws NotFoundException { + return pool.get(javaLangObject); + } + + public CtMethod[] getMethods() { + try { + return getSuperclass().getMethods(); + } + catch (NotFoundException e) { + return super.getMethods(); + } + } + + public CtMethod getMethod(String name, String desc) + throws NotFoundException + { + return getSuperclass().getMethod(name, desc); + } + + public CtConstructor[] getConstructors() { + try { + return getSuperclass().getConstructors(); + } + catch (NotFoundException e) { + return super.getConstructors(); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java b/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java new file mode 100644 index 0000000..ff03e03 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java @@ -0,0 +1,1219 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.expr.ExprEditor; + +/** + * CtBehavior represents a method, a constructor, + * or a static constructor (class initializer). + * It is the abstract super class of + * CtMethod and CtConstructor. + * + *

To directly read or modify bytecode, obtain MethodInfo + * objects. + * + * @see #getMethodInfo() + */ +public abstract class CtBehavior extends CtMember { + protected MethodInfo methodInfo; + + protected CtBehavior(CtClass clazz, MethodInfo minfo) { + super(clazz); + methodInfo = minfo; + } + + /** + * @param isCons true if this is a constructor. + */ + void copy(CtBehavior src, boolean isCons, ClassMap map) + throws CannotCompileException + { + CtClass declaring = declaringClass; + MethodInfo srcInfo = src.methodInfo; + CtClass srcClass = src.getDeclaringClass(); + ConstPool cp = declaring.getClassFile2().getConstPool(); + + map = new ClassMap(map); + map.put(srcClass.getName(), declaring.getName()); + try { + boolean patch = false; + CtClass srcSuper = srcClass.getSuperclass(); + CtClass destSuper = declaring.getSuperclass(); + String destSuperName = null; + if (srcSuper != null && destSuper != null) { + String srcSuperName = srcSuper.getName(); + destSuperName = destSuper.getName(); + if (!srcSuperName.equals(destSuperName)) + if (srcSuperName.equals(CtClass.javaLangObject)) + patch = true; + else + map.putIfNone(srcSuperName, destSuperName); + } + + // a stack map table is copied from srcInfo. + methodInfo = new MethodInfo(cp, srcInfo.getName(), srcInfo, map); + if (isCons && patch) + methodInfo.setSuperclass(destSuperName); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + protected void extendToString(StringBuffer buffer) { + buffer.append(' '); + buffer.append(getName()); + buffer.append(' '); + buffer.append(methodInfo.getDescriptor()); + } + + /** + * Returns the method or constructor name followed by parameter types + * such as javassist.CtBehavior.stBody(String). + * + * @since 3.5 + */ + public abstract String getLongName(); + + /** + * Returns the MethodInfo representing this method/constructor in the + * class file. + * + *

If you modify the bytecode through the returned + * MethodInfo object, you might have to explicitly + * rebuild a stack map table. Javassist does not automatically + * rebuild it for avoiding unnecessary rebuilding. + * + * @see javassist.bytecode.MethodInfo#rebuildStackMap(ClassPool) + */ + public MethodInfo getMethodInfo() { + declaringClass.checkModify(); + return methodInfo; + } + + /** + * Returns the MethodInfo representing the method/constructor in the + * class file (read only). + * Normal applications do not need calling this method. Use + * getMethodInfo(). + * + *

The MethodInfo object obtained by this method + * is read only. Changes to this object might not be reflected + * on a class file generated by toBytecode(), + * toClass(), etc in CtClass. + * + *

This method is available even if the CtClass + * containing this method is frozen. However, if the class is + * frozen, the MethodInfo might be also pruned. + * + * @see #getMethodInfo() + * @see CtClass#isFrozen() + * @see CtClass#prune() + */ + public MethodInfo getMethodInfo2() { return methodInfo; } + + /** + * Obtains the modifiers of the method/constructor. + * + * @return modifiers encoded with + * javassist.Modifier. + * @see Modifier + */ + public int getModifiers() { + return AccessFlag.toModifier(methodInfo.getAccessFlags()); + } + + /** + * Sets the encoded modifiers of the method/constructor. + * + *

Changing the modifiers may cause a problem. + * For example, if a non-static method is changed to static, + * the method will be rejected by the bytecode verifier. + * + * @see Modifier + */ + public void setModifiers(int mod) { + declaringClass.checkModify(); + methodInfo.setAccessFlags(AccessFlag.of(mod)); + } + + /** + * Returns true if the class has the specified annotation class. + * + * @param clz the annotation class. + * @return true if the annotation is found, + * otherwise false. + * @since 3.11 + */ + public boolean hasAnnotation(Class clz) { + MethodInfo mi = getMethodInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.hasAnnotationType(clz, + getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the annotation if the class has the specified annotation class. + * For example, if an annotation @Author is associated + * with this method/constructor, an Author object is returned. + * The member values can be obtained by calling methods on + * the Author object. + * + * @param clz the annotation class. + * @return the annotation if found, otherwise null. + * @since 3.11 + */ + public Object getAnnotation(Class clz) throws ClassNotFoundException { + MethodInfo mi = getMethodInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.getAnnotationType(clz, + getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the annotations associated with this method or constructor. + * + * @return an array of annotation-type objects. + * @see #getAvailableAnnotations() + * @since 3.1 + */ + public Object[] getAnnotations() throws ClassNotFoundException { + return getAnnotations(false); + } + + /** + * Returns the annotations associated with this method or constructor. + * If any annotations are not on the classpath, they are not included + * in the returned array. + * + * @return an array of annotation-type objects. + * @see #getAnnotations() + * @since 3.3 + */ + public Object[] getAvailableAnnotations(){ + try{ + return getAnnotations(true); + } + catch (ClassNotFoundException e){ + throw new RuntimeException("Unexpected exception", e); + } + } + + private Object[] getAnnotations(boolean ignoreNotFound) + throws ClassNotFoundException + { + MethodInfo mi = getMethodInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + mi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.toAnnotationType(ignoreNotFound, + getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the parameter annotations associated with this method or constructor. + * + * @return an array of annotation-type objects. The length of the returned array is + * equal to the number of the formal parameters. If each parameter has no + * annotation, the elements of the returned array are empty arrays. + * + * @see #getAvailableParameterAnnotations() + * @see #getAnnotations() + * @since 3.1 + */ + public Object[][] getParameterAnnotations() throws ClassNotFoundException { + return getParameterAnnotations(false); + } + + /** + * Returns the parameter annotations associated with this method or constructor. + * If any annotations are not on the classpath, they are not included in the + * returned array. + * + * @return an array of annotation-type objects. The length of the returned array is + * equal to the number of the formal parameters. If each parameter has no + * annotation, the elements of the returned array are empty arrays. + * + * @see #getParameterAnnotations() + * @see #getAvailableAnnotations() + * @since 3.3 + */ + public Object[][] getAvailableParameterAnnotations(){ + try { + return getParameterAnnotations(true); + } + catch(ClassNotFoundException e) { + throw new RuntimeException("Unexpected exception", e); + } + } + + Object[][] getParameterAnnotations(boolean ignoreNotFound) + throws ClassNotFoundException + { + MethodInfo mi = getMethodInfo2(); + ParameterAnnotationsAttribute ainfo = (ParameterAnnotationsAttribute) + mi.getAttribute(ParameterAnnotationsAttribute.invisibleTag); + ParameterAnnotationsAttribute ainfo2 = (ParameterAnnotationsAttribute) + mi.getAttribute(ParameterAnnotationsAttribute.visibleTag); + return CtClassType.toAnnotationType(ignoreNotFound, + getDeclaringClass().getClassPool(), + ainfo, ainfo2, mi); + } + + /** + * Obtains parameter types of this method/constructor. + */ + public CtClass[] getParameterTypes() throws NotFoundException { + return Descriptor.getParameterTypes(methodInfo.getDescriptor(), + declaringClass.getClassPool()); + } + + /** + * Obtains the type of the returned value. + */ + CtClass getReturnType0() throws NotFoundException { + return Descriptor.getReturnType(methodInfo.getDescriptor(), + declaringClass.getClassPool()); + } + + /** + * Returns the method signature (the parameter types + * and the return type). + * The method signature is represented by a character string + * called method descriptor, which is defined in the JVM specification. + * If two methods/constructors have + * the same parameter types + * and the return type, getSignature() returns the + * same string (the return type of constructors is void). + * + *

Note that the returned string is not the type signature + * contained in the SignatureAttirbute. It is + * a descriptor. + * + * @see javassist.bytecode.Descriptor + * @see #getGenericSignature() + */ + public String getSignature() { + return methodInfo.getDescriptor(); + } + + /** + * Returns the generic signature of the method. + * It represents parameter types including type variables. + * + * @see SignatureAttribute#toMethodSignature(String) + * @since 3.17 + */ + public String getGenericSignature() { + SignatureAttribute sa + = (SignatureAttribute)methodInfo.getAttribute(SignatureAttribute.tag); + return sa == null ? null : sa.getSignature(); + } + + /** + * Set the generic signature of the method. + * It represents parameter types including type variables. + * See {@link javassist.CtClass#setGenericSignature(String)} + * for a code sample. + * + * @param sig a new generic signature. + * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() + * @since 3.17 + */ + public void setGenericSignature(String sig) { + declaringClass.checkModify(); + methodInfo.addAttribute(new SignatureAttribute(methodInfo.getConstPool(), sig)); + } + + /** + * Obtains exceptions that this method/constructor may throw. + * + * @return a zero-length array if there is no throws clause. + */ + public CtClass[] getExceptionTypes() throws NotFoundException { + String[] exceptions; + ExceptionsAttribute ea = methodInfo.getExceptionsAttribute(); + if (ea == null) + exceptions = null; + else + exceptions = ea.getExceptions(); + + return declaringClass.getClassPool().get(exceptions); + } + + /** + * Sets exceptions that this method/constructor may throw. + */ + public void setExceptionTypes(CtClass[] types) throws NotFoundException { + declaringClass.checkModify(); + if (types == null || types.length == 0) { + methodInfo.removeExceptionsAttribute(); + return; + } + + String[] names = new String[types.length]; + for (int i = 0; i < types.length; ++i) + names[i] = types[i].getName(); + + ExceptionsAttribute ea = methodInfo.getExceptionsAttribute(); + if (ea == null) { + ea = new ExceptionsAttribute(methodInfo.getConstPool()); + methodInfo.setExceptionsAttribute(ea); + } + + ea.setExceptions(names); + } + + /** + * Returns true if the body is empty. + */ + public abstract boolean isEmpty(); + + /** + * Sets a method/constructor body. + * + * @param src the source code representing the body. + * It must be a single statement or block. + * If it is null, the substituted + * body does nothing except returning zero or null. + */ + public void setBody(String src) throws CannotCompileException { + setBody(src, null, null); + } + + /** + * Sets a method/constructor body. + * + * @param src the source code representing the body. + * It must be a single statement or block. + * If it is null, the substituted + * body does nothing except returning zero or null. + * @param delegateObj the source text specifying the object + * that is called on by $proceed(). + * @param delegateMethod the name of the method + * that is called by $proceed(). + */ + public void setBody(String src, + String delegateObj, String delegateMethod) + throws CannotCompileException + { + CtClass cc = declaringClass; + cc.checkModify(); + try { + Javac jv = new Javac(cc); + if (delegateMethod != null) + jv.recordProceed(delegateObj, delegateMethod); + + Bytecode b = jv.compileBody(this, src); + methodInfo.setCodeAttribute(b.toCodeAttribute()); + methodInfo.setAccessFlags(methodInfo.getAccessFlags() + & ~AccessFlag.ABSTRACT); + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + declaringClass.rebuildClassFile(); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + static void setBody0(CtClass srcClass, MethodInfo srcInfo, + CtClass destClass, MethodInfo destInfo, + ClassMap map) + throws CannotCompileException + { + destClass.checkModify(); + + map = new ClassMap(map); + map.put(srcClass.getName(), destClass.getName()); + try { + CodeAttribute cattr = srcInfo.getCodeAttribute(); + if (cattr != null) { + ConstPool cp = destInfo.getConstPool(); + CodeAttribute ca = (CodeAttribute)cattr.copy(cp, map); + destInfo.setCodeAttribute(ca); + // a stack map table is copied to destInfo. + } + } + catch (CodeAttribute.RuntimeCopyException e) { + /* the exception may be thrown by copy() in CodeAttribute. + */ + throw new CannotCompileException(e); + } + + destInfo.setAccessFlags(destInfo.getAccessFlags() + & ~AccessFlag.ABSTRACT); + destClass.rebuildClassFile(); + } + + /** + * Obtains an attribute with the given name. + * If that attribute is not found in the class file, this + * method returns null. + * + *

Note that an attribute is a data block specified by + * the class file format. It is not an annotation. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + */ + public byte[] getAttribute(String name) { + AttributeInfo ai = methodInfo.getAttribute(name); + if (ai == null) + return null; + else + return ai.get(); + } + + /** + * Adds an attribute. The attribute is saved in the class file. + * + *

Note that an attribute is a data block specified by + * the class file format. It is not an annotation. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + * @param data attribute value + */ + public void setAttribute(String name, byte[] data) { + declaringClass.checkModify(); + methodInfo.addAttribute(new AttributeInfo(methodInfo.getConstPool(), + name, data)); + } + + /** + * Declares to use $cflow for this method/constructor. + * If $cflow is used, the class files modified + * with Javassist requires a support class + * javassist.runtime.Cflow at runtime + * (other Javassist classes are not required at runtime). + * + *

Every $cflow variable is given a unique name. + * For example, if the given name is "Point.paint", + * then the variable is indicated by $cflow(Point.paint). + * + * @param name $cflow name. It can include + * alphabets, numbers, _, + * $, and . (dot). + * + * @see javassist.runtime.Cflow + */ + public void useCflow(String name) throws CannotCompileException { + CtClass cc = declaringClass; + cc.checkModify(); + ClassPool pool = cc.getClassPool(); + String fname; + int i = 0; + while (true) { + fname = "_cflow$" + i++; + try { + cc.getDeclaredField(fname); + } + catch(NotFoundException e) { + break; + } + } + + pool.recordCflow(name, declaringClass.getName(), fname); + try { + CtClass type = pool.get("javassist.runtime.Cflow"); + CtField field = new CtField(type, fname, cc); + field.setModifiers(Modifier.PUBLIC | Modifier.STATIC); + cc.addField(field, CtField.Initializer.byNew(type)); + insertBefore(fname + ".enter();", false); + String src = fname + ".exit();"; + insertAfter(src, true); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + /** + * Declares a new local variable. The scope of this variable is the + * whole method body. The initial value of that variable is not set. + * The declared variable can be accessed in the code snippet inserted + * by insertBefore(), insertAfter(), etc. + * + *

If the second parameter asFinally to + * insertAfter() is true, the declared local variable + * is not visible from the code inserted by insertAfter(). + * + * @param name the name of the variable + * @param type the type of the variable + * @see #insertBefore(String) + * @see #insertAfter(String) + */ + public void addLocalVariable(String name, CtClass type) + throws CannotCompileException + { + declaringClass.checkModify(); + ConstPool cp = methodInfo.getConstPool(); + CodeAttribute ca = methodInfo.getCodeAttribute(); + if (ca == null) + throw new CannotCompileException("no method body"); + + LocalVariableAttribute va = (LocalVariableAttribute)ca.getAttribute( + LocalVariableAttribute.tag); + if (va == null) { + va = new LocalVariableAttribute(cp); + ca.getAttributes().add(va); + } + + int maxLocals = ca.getMaxLocals(); + String desc = Descriptor.of(type); + va.addEntry(0, ca.getCodeLength(), + cp.addUtf8Info(name), cp.addUtf8Info(desc), maxLocals); + ca.setMaxLocals(maxLocals + Descriptor.dataSize(desc)); + } + + /** + * Inserts a new parameter, which becomes the first parameter. + */ + public void insertParameter(CtClass type) + throws CannotCompileException + { + declaringClass.checkModify(); + String desc = methodInfo.getDescriptor(); + String desc2 = Descriptor.insertParameter(type, desc); + try { + addParameter2(Modifier.isStatic(getModifiers()) ? 0 : 1, type, desc); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + + methodInfo.setDescriptor(desc2); + } + + /** + * Appends a new parameter, which becomes the last parameter. + */ + public void addParameter(CtClass type) + throws CannotCompileException + { + declaringClass.checkModify(); + String desc = methodInfo.getDescriptor(); + String desc2 = Descriptor.appendParameter(type, desc); + int offset = Modifier.isStatic(getModifiers()) ? 0 : 1; + try { + addParameter2(offset + Descriptor.paramSize(desc), type, desc); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + + methodInfo.setDescriptor(desc2); + } + + private void addParameter2(int where, CtClass type, String desc) + throws BadBytecode + { + CodeAttribute ca = methodInfo.getCodeAttribute(); + if (ca != null) { + int size = 1; + char typeDesc = 'L'; + int classInfo = 0; + if (type.isPrimitive()) { + CtPrimitiveType cpt = (CtPrimitiveType)type; + size = cpt.getDataSize(); + typeDesc = cpt.getDescriptor(); + } + else + classInfo = methodInfo.getConstPool().addClassInfo(type); + + ca.insertLocalVar(where, size); + LocalVariableAttribute va + = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.tag); + if (va != null) + va.shiftIndex(where, size); + + LocalVariableTypeAttribute lvta + = (LocalVariableTypeAttribute)ca.getAttribute(LocalVariableTypeAttribute.tag); + if (lvta != null) + lvta.shiftIndex(where, size); + + StackMapTable smt = (StackMapTable)ca.getAttribute(StackMapTable.tag); + if (smt != null) + smt.insertLocal(where, StackMapTable.typeTagOf(typeDesc), classInfo); + + StackMap sm = (StackMap)ca.getAttribute(StackMap.tag); + if (sm != null) + sm.insertLocal(where, StackMapTable.typeTagOf(typeDesc), classInfo); + } + } + + /** + * Modifies the method/constructor body. + * + * @param converter specifies how to modify. + */ + public void instrument(CodeConverter converter) + throws CannotCompileException + { + declaringClass.checkModify(); + ConstPool cp = methodInfo.getConstPool(); + converter.doit(getDeclaringClass(), methodInfo, cp); + } + + /** + * Modifies the method/constructor body. + * + *

While executing this method, only replace() + * in Expr is available for bytecode modification. + * Other methods such as insertBefore() may collapse + * the bytecode because the ExprEditor loses + * its current position. + * + * @param editor specifies how to modify. + * @see javassist.expr.Expr#replace(String) + * @see #insertBefore(String) + */ + public void instrument(ExprEditor editor) + throws CannotCompileException + { + // if the class is not frozen, + // does not turn the modified flag on. + if (declaringClass.isFrozen()) + declaringClass.checkModify(); + + if (editor.doit(declaringClass, methodInfo)) + declaringClass.checkModify(); + } + + /** + * Inserts bytecode at the beginning of the body. + * + *

If this object represents a constructor, + * the bytecode is inserted before + * a constructor in the super class or this class is called. + * Therefore, the inserted bytecode is subject to constraints described + * in Section 4.8.2 of The Java Virtual Machine Specification (2nd ed). + * For example, it cannot access instance fields or methods although + * it may assign a value to an instance field directly declared in this + * class. Accessing static fields and methods is allowed. + * Use insertBeforeBody() in CtConstructor. + * + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + * @see CtConstructor#insertBeforeBody(String) + */ + public void insertBefore(String src) throws CannotCompileException { + insertBefore(src, true); + } + + private void insertBefore(String src, boolean rebuild) + throws CannotCompileException + { + CtClass cc = declaringClass; + cc.checkModify(); + CodeAttribute ca = methodInfo.getCodeAttribute(); + if (ca == null) + throw new CannotCompileException("no method body"); + + CodeIterator iterator = ca.iterator(); + Javac jv = new Javac(cc); + try { + int nvars = jv.recordParams(getParameterTypes(), + Modifier.isStatic(getModifiers())); + jv.recordParamNames(ca, nvars); + jv.recordLocalVariables(ca, 0); + jv.recordType(getReturnType0()); + jv.compileStmnt(src); + Bytecode b = jv.getBytecode(); + int stack = b.getMaxStack(); + int locals = b.getMaxLocals(); + + if (stack > ca.getMaxStack()) + ca.setMaxStack(stack); + + if (locals > ca.getMaxLocals()) + ca.setMaxLocals(locals); + + int pos = iterator.insertEx(b.get()); + iterator.insert(b.getExceptionTable(), pos); + if (rebuild) + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + /** + * Inserts bytecode at the end of the body. + * The bytecode is inserted just before every return insturction. + * It is not executed when an exception is thrown. + * + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + */ + public void insertAfter(String src) + throws CannotCompileException + { + insertAfter(src, false); + } + + /** + * Inserts bytecode at the end of the body. + * The bytecode is inserted just before every return insturction. + * + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + * @param asFinally true if the inserted bytecode is executed + * not only when the control normally returns + * but also when an exception is thrown. + * If this parameter is true, the inserted code cannot + * access local variables. + */ + public void insertAfter(String src, boolean asFinally) + throws CannotCompileException + { + CtClass cc = declaringClass; + cc.checkModify(); + ConstPool pool = methodInfo.getConstPool(); + CodeAttribute ca = methodInfo.getCodeAttribute(); + if (ca == null) + throw new CannotCompileException("no method body"); + + CodeIterator iterator = ca.iterator(); + int retAddr = ca.getMaxLocals(); + Bytecode b = new Bytecode(pool, 0, retAddr + 1); + b.setStackDepth(ca.getMaxStack() + 1); + Javac jv = new Javac(b, cc); + try { + int nvars = jv.recordParams(getParameterTypes(), + Modifier.isStatic(getModifiers())); + jv.recordParamNames(ca, nvars); + CtClass rtype = getReturnType0(); + int varNo = jv.recordReturnType(rtype, true); + jv.recordLocalVariables(ca, 0); + + // finally clause for exceptions + int handlerLen = insertAfterHandler(asFinally, b, rtype, varNo, + jv, src); + int handlerPos = iterator.getCodeLength(); + if (asFinally) + ca.getExceptionTable().add(getStartPosOfBody(ca), handlerPos, handlerPos, 0); + + int adviceLen = 0; + int advicePos = 0; + boolean noReturn = true; + while (iterator.hasNext()) { + int pos = iterator.next(); + if (pos >= handlerPos) + break; + + int c = iterator.byteAt(pos); + if (c == Opcode.ARETURN || c == Opcode.IRETURN + || c == Opcode.FRETURN || c == Opcode.LRETURN + || c == Opcode.DRETURN || c == Opcode.RETURN) { + if (noReturn) { + // finally clause for normal termination + adviceLen = insertAfterAdvice(b, jv, src, pool, rtype, varNo); + handlerPos = iterator.append(b.get()); + iterator.append(b.getExceptionTable(), handlerPos); + advicePos = iterator.getCodeLength() - adviceLen; + handlerLen = advicePos - handlerPos; + noReturn = false; + } + insertGoto(iterator, advicePos, pos); + advicePos = iterator.getCodeLength() - adviceLen; + handlerPos = advicePos - handlerLen; + } + } + + if (noReturn) { + handlerPos = iterator.append(b.get()); + iterator.append(b.getExceptionTable(), handlerPos); + } + + ca.setMaxStack(b.getMaxStack()); + ca.setMaxLocals(b.getMaxLocals()); + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + private int insertAfterAdvice(Bytecode code, Javac jv, String src, + ConstPool cp, CtClass rtype, int varNo) + throws CompileError + { + int pc = code.currentPc(); + if (rtype == CtClass.voidType) { + code.addOpcode(Opcode.ACONST_NULL); + code.addAstore(varNo); + jv.compileStmnt(src); + code.addOpcode(Opcode.RETURN); + if (code.getMaxLocals() < 1) + code.setMaxLocals(1); + } + else { + code.addStore(varNo, rtype); + jv.compileStmnt(src); + code.addLoad(varNo, rtype); + if (rtype.isPrimitive()) + code.addOpcode(((CtPrimitiveType)rtype).getReturnOp()); + else + code.addOpcode(Opcode.ARETURN); + } + + return code.currentPc() - pc; + } + + /* + * assert subr > pos + */ + private void insertGoto(CodeIterator iterator, int subr, int pos) + throws BadBytecode + { + iterator.setMark(subr); + // the gap length might be a multiple of 4. + iterator.writeByte(Opcode.NOP, pos); + boolean wide = subr + 2 - pos > Short.MAX_VALUE; + int len = wide ? 4 : 2; + CodeIterator.Gap gap = iterator.insertGapAt(pos, len, false); + pos = gap.position + gap.length - len; + int offset = iterator.getMark() - pos; + if (wide) { + iterator.writeByte(Opcode.GOTO_W, pos); + iterator.write32bit(offset, pos + 1); + } + else if (offset <= Short.MAX_VALUE) { + iterator.writeByte(Opcode.GOTO, pos); + iterator.write16bit(offset, pos + 1); + } + else { + if (gap.length < 4) { + CodeIterator.Gap gap2 = iterator.insertGapAt(gap.position, 2, false); + pos = gap2.position + gap2.length + gap.length - 4; + } + + iterator.writeByte(Opcode.GOTO_W, pos); + iterator.write32bit(iterator.getMark() - pos, pos + 1); + } + } + + /* insert a finally clause + */ + private int insertAfterHandler(boolean asFinally, Bytecode b, + CtClass rtype, int returnVarNo, + Javac javac, String src) + throws CompileError + { + if (!asFinally) + return 0; + + int var = b.getMaxLocals(); + b.incMaxLocals(1); + int pc = b.currentPc(); + b.addAstore(var); // store an exception + if (rtype.isPrimitive()) { + char c = ((CtPrimitiveType)rtype).getDescriptor(); + if (c == 'D') { + b.addDconst(0.0); + b.addDstore(returnVarNo); + } + else if (c == 'F') { + b.addFconst(0); + b.addFstore(returnVarNo); + } + else if (c == 'J') { + b.addLconst(0); + b.addLstore(returnVarNo); + } + else if (c == 'V') { + b.addOpcode(Opcode.ACONST_NULL); + b.addAstore(returnVarNo); + } + else { // int, boolean, char, short, ... + b.addIconst(0); + b.addIstore(returnVarNo); + } + } + else { + b.addOpcode(Opcode.ACONST_NULL); + b.addAstore(returnVarNo); + } + + javac.compileStmnt(src); + b.addAload(var); + b.addOpcode(Opcode.ATHROW); + return b.currentPc() - pc; + } + + /* -- OLD version -- + + public void insertAfter(String src) throws CannotCompileException { + declaringClass.checkModify(); + CodeAttribute ca = methodInfo.getCodeAttribute(); + CodeIterator iterator = ca.iterator(); + Bytecode b = new Bytecode(methodInfo.getConstPool(), + ca.getMaxStack(), ca.getMaxLocals()); + b.setStackDepth(ca.getMaxStack()); + Javac jv = new Javac(b, declaringClass); + try { + jv.recordParams(getParameterTypes(), + Modifier.isStatic(getModifiers())); + CtClass rtype = getReturnType0(); + int varNo = jv.recordReturnType(rtype, true); + boolean isVoid = rtype == CtClass.voidType; + if (isVoid) { + b.addOpcode(Opcode.ACONST_NULL); + b.addAstore(varNo); + jv.compileStmnt(src); + } + else { + b.addStore(varNo, rtype); + jv.compileStmnt(src); + b.addLoad(varNo, rtype); + } + + byte[] code = b.get(); + ca.setMaxStack(b.getMaxStack()); + ca.setMaxLocals(b.getMaxLocals()); + while (iterator.hasNext()) { + int pos = iterator.next(); + int c = iterator.byteAt(pos); + if (c == Opcode.ARETURN || c == Opcode.IRETURN + || c == Opcode.FRETURN || c == Opcode.LRETURN + || c == Opcode.DRETURN || c == Opcode.RETURN) + iterator.insert(pos, code); + } + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + */ + + /** + * Adds a catch clause that handles an exception thrown in the + * body. The catch clause must end with a return or throw statement. + * + * @param src the source code representing the catch clause. + * It must be a single statement or block. + * @param exceptionType the type of the exception handled by the + * catch clause. + */ + public void addCatch(String src, CtClass exceptionType) + throws CannotCompileException + { + addCatch(src, exceptionType, "$e"); + } + + /** + * Adds a catch clause that handles an exception thrown in the + * body. The catch clause must end with a return or throw statement. + * + * @param src the source code representing the catch clause. + * It must be a single statement or block. + * @param exceptionType the type of the exception handled by the + * catch clause. + * @param exceptionName the name of the variable containing the + * caught exception, for example, + * $e. + */ + public void addCatch(String src, CtClass exceptionType, + String exceptionName) + throws CannotCompileException + { + CtClass cc = declaringClass; + cc.checkModify(); + ConstPool cp = methodInfo.getConstPool(); + CodeAttribute ca = methodInfo.getCodeAttribute(); + CodeIterator iterator = ca.iterator(); + Bytecode b = new Bytecode(cp, ca.getMaxStack(), ca.getMaxLocals()); + b.setStackDepth(1); + Javac jv = new Javac(b, cc); + try { + jv.recordParams(getParameterTypes(), + Modifier.isStatic(getModifiers())); + int var = jv.recordVariable(exceptionType, exceptionName); + b.addAstore(var); + jv.compileStmnt(src); + + int stack = b.getMaxStack(); + int locals = b.getMaxLocals(); + + if (stack > ca.getMaxStack()) + ca.setMaxStack(stack); + + if (locals > ca.getMaxLocals()) + ca.setMaxLocals(locals); + + int len = iterator.getCodeLength(); + int pos = iterator.append(b.get()); + ca.getExceptionTable().add(getStartPosOfBody(ca), len, len, + cp.addClassInfo(exceptionType)); + iterator.append(b.getExceptionTable(), pos); + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + /* CtConstructor overrides this method. + */ + int getStartPosOfBody(CodeAttribute ca) throws CannotCompileException { + return 0; + } + + /** + * Inserts bytecode at the specified line in the body. + * It is equivalent to: + * + *
insertAt(lineNum, true, src) + * + *
See this method as well. + * + * @param lineNum the line number. The bytecode is inserted at the + * beginning of the code at the line specified by this + * line number. + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + * @return the line number at which the bytecode has been inserted. + * + * @see CtBehavior#insertAt(int,boolean,String) + */ + public int insertAt(int lineNum, String src) + throws CannotCompileException + { + return insertAt(lineNum, true, src); + } + + /** + * Inserts bytecode at the specified line in the body. + * + *

If there is not + * a statement at the specified line, the bytecode might be inserted + * at the line including the first statement after that line specified. + * For example, if there is only a closing brace at that line, the + * bytecode would be inserted at another line below. + * To know exactly where the bytecode will be inserted, call with + * modify set to false. + * + * @param lineNum the line number. The bytecode is inserted at the + * beginning of the code at the line specified by this + * line number. + * @param modify if false, this method does not insert the bytecode. + * It instead only returns the line number at which + * the bytecode would be inserted. + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + * If modify is false, the value of src can be null. + * @return the line number at which the bytecode has been inserted. + */ + public int insertAt(int lineNum, boolean modify, String src) + throws CannotCompileException + { + CodeAttribute ca = methodInfo.getCodeAttribute(); + if (ca == null) + throw new CannotCompileException("no method body"); + + LineNumberAttribute ainfo + = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); + if (ainfo == null) + throw new CannotCompileException("no line number info"); + + LineNumberAttribute.Pc pc = ainfo.toNearPc(lineNum); + lineNum = pc.line; + int index = pc.index; + if (!modify) + return lineNum; + + CtClass cc = declaringClass; + cc.checkModify(); + CodeIterator iterator = ca.iterator(); + Javac jv = new Javac(cc); + try { + jv.recordLocalVariables(ca, index); + jv.recordParams(getParameterTypes(), + Modifier.isStatic(getModifiers())); + jv.setMaxLocals(ca.getMaxLocals()); + jv.compileStmnt(src); + Bytecode b = jv.getBytecode(); + int locals = b.getMaxLocals(); + int stack = b.getMaxStack(); + ca.setMaxLocals(locals); + + /* We assume that there is no values in the operand stack + * at the position where the bytecode is inserted. + */ + if (stack > ca.getMaxStack()) + ca.setMaxStack(stack); + + index = iterator.insertAt(index, b.get()); + iterator.insert(b.getExceptionTable(), index); + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + return lineNum; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtClass.java b/src/main/java/com/wenshuo/agent/javassist/CtClass.java new file mode 100644 index 0000000..21fe5ac --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtClass.java @@ -0,0 +1,1595 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.BufferedOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.DataOutputStream; +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.net.URL; +import java.security.ProtectionDomain; +import java.util.Collection; + +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.Opcode; +import com.wenshuo.agent.javassist.expr.ExprEditor; + +/* Note: + * + * This class is an abstract class and several methods just return null + * or throw an exception. Those methods are overridden in subclasses + * of this class. Read the source code of CtClassType if you are + * interested in the implementation of Javassist. + * + * Subclasses of CtClass are CtClassType, CtPrimitiveType, and CtArray. + */ + +/** + * An instance of CtClass represents a class. + * It is obtained from ClassPool. + * + * @see ClassPool#get(String) + */ +public abstract class CtClass { + protected String qualifiedName; + + /** + * If the value of this field is not null, then all class + * files modified by Javassist are saved under the directory + * specified by this variable. For example, if the value is + * "./debug", then all class files are saved + * there. The directory name must not end with a directory + * separator such as /. + * + *

The default value is null. + * + * @see #debugWriteFile(String) + * @since 3.16 + */ + public static String debugDump = null; + + /** + * The version number of this release. + */ + public static final String version = "3.20.0-GA"; + + /** + * Prints the version number and the copyright notice. + * + *

The following command invokes this method: + * + * 

java -jar javassist.jar
+ */ + public static void main(String[] args) { + System.out.println("Javassist version " + CtClass.version); + System.out.println("Copyright (C) 1999-2015 Shigeru Chiba." + + " All Rights Reserved."); + } + + static final String javaLangObject = "java.lang.Object"; + + /** + * The CtClass object representing + * the boolean type. + */ + public static CtClass booleanType; + + /** + * The CtClass object representing + * the char type. + */ + public static CtClass charType; + + /** + * The CtClass object representing + * the byte type. + */ + public static CtClass byteType; + + /** + * The CtClass object representing + * the short type. + */ + public static CtClass shortType; + + /** + * The CtClass object representing + * the int type. + */ + public static CtClass intType; + + /** + * The CtClass object representing + * the long type. + */ + public static CtClass longType; + + /** + * The CtClass object representing + * the float type. + */ + public static CtClass floatType; + + /** + * The CtClass object representing + * the double type. + */ + public static CtClass doubleType; + + /** + * The CtClass object representing + * the void type. + */ + public static CtClass voidType; + + static CtClass[] primitiveTypes; + + static { + primitiveTypes = new CtClass[9]; + + booleanType = + new CtPrimitiveType("boolean", 'Z', "java.lang.Boolean", + "booleanValue", "()Z", Opcode.IRETURN, + Opcode.T_BOOLEAN, 1); + primitiveTypes[0] = booleanType; + + charType = new CtPrimitiveType("char", 'C', "java.lang.Character", + "charValue", "()C", Opcode.IRETURN, + Opcode.T_CHAR, 1); + primitiveTypes[1] = charType; + + byteType = new CtPrimitiveType("byte", 'B', "java.lang.Byte", + "byteValue", "()B", Opcode.IRETURN, + Opcode.T_BYTE, 1); + primitiveTypes[2] = byteType; + + shortType = new CtPrimitiveType("short", 'S', "java.lang.Short", + "shortValue", "()S", Opcode.IRETURN, + Opcode.T_SHORT, 1); + primitiveTypes[3] = shortType; + + intType = new CtPrimitiveType("int", 'I', "java.lang.Integer", + "intValue", "()I", Opcode.IRETURN, + Opcode.T_INT, 1); + primitiveTypes[4] = intType; + + longType = new CtPrimitiveType("long", 'J', "java.lang.Long", + "longValue", "()J", Opcode.LRETURN, + Opcode.T_LONG, 2); + primitiveTypes[5] = longType; + + floatType = new CtPrimitiveType("float", 'F', "java.lang.Float", + "floatValue", "()F", Opcode.FRETURN, + Opcode.T_FLOAT, 1); + primitiveTypes[6] = floatType; + + doubleType = new CtPrimitiveType("double", 'D', "java.lang.Double", + "doubleValue", "()D", Opcode.DRETURN, + Opcode.T_DOUBLE, 2); + primitiveTypes[7] = doubleType; + + voidType = new CtPrimitiveType("void", 'V', "java.lang.Void", + null, null, Opcode.RETURN, 0, 0); + primitiveTypes[8] = voidType; + } + + protected CtClass(String name) { + qualifiedName = name; + } + + /** + * Converts the object to a string. + */ + public String toString() { + StringBuffer buf = new StringBuffer(getClass().getName()); + buf.append("@"); + buf.append(Integer.toHexString(hashCode())); + buf.append("["); + extendToString(buf); + buf.append("]"); + return buf.toString(); + } + + /** + * Implemented in subclasses to add to the {@link #toString()} result. + * Subclasses should put a space before each token added to the buffer. + */ + protected void extendToString(StringBuffer buffer) { + buffer.append(getName()); + } + + /** + * Returns a ClassPool for this class. + */ + public ClassPool getClassPool() { return null; } + + /** + * Returns a class file for this class. + * + *

This method is not available if isFrozen() + * is true. + */ + public ClassFile getClassFile() { + checkModify(); + return getClassFile2(); + } + + /** + * Returns a class file for this class (read only). + * Normal applications do not need calling this method. Use + * getClassFile(). + * + *

The ClassFile object obtained by this method + * is read only. Changes to this object might not be reflected + * on a class file generated by toBytecode(), + * toClass(), etc. + * + *

This method is available even if isFrozen() + * is true. However, if the class is frozen, it might be also + * pruned. + * + * @see CtClass#getClassFile() + * @see CtClass#isFrozen() + * @see CtClass#prune() + */ + public ClassFile getClassFile2() { return null; } + + /** + * Undocumented method. Do not use; internal-use only. + */ + public com.wenshuo.agent.javassist.compiler.AccessorMaker getAccessorMaker() { + return null; + } + + /** + * Returns the uniform resource locator (URL) of the class file. + */ + public URL getURL() throws NotFoundException { + throw new NotFoundException(getName()); + } + + /** + * Returns true if the definition of the class has been modified. + */ + public boolean isModified() { return false; } + + /** + * Returns true if the class has been loaded or written out + * and thus it cannot be modified any more. + * + * @see #defrost() + * @see #detach() + */ + public boolean isFrozen() { return true; } + + /** + * Makes the class frozen. + * + * @see #isFrozen() + * @see #defrost() + * @since 3.6 + */ + public void freeze() {} + + /* Note: this method is overridden by CtClassType + */ + void checkModify() throws RuntimeException { + if (isFrozen()) + throw new RuntimeException(getName() + " class is frozen"); + + // isModified() must return true after this method is invoked. + } + + /** + * Defrosts the class so that the class can be modified again. + * + *

To avoid changes that will be never reflected, + * the class is frozen to be unmodifiable if it is loaded or + * written out. This method should be called only in a case + * that the class will be reloaded or written out later again. + * + *

If defrost() will be called later, pruning + * must be disallowed in advance. + * + * @see #isFrozen() + * @see #stopPruning(boolean) + * @see #detach() + */ + public void defrost() { + throw new RuntimeException("cannot defrost " + getName()); + } + + /** + * Returns true if this object represents a primitive + * Java type: boolean, byte, char, short, int, long, float, double, + * or void. + */ + public boolean isPrimitive() { return false; } + + /** + * Returns true if this object represents an array type. + */ + public boolean isArray() { + return false; + } + + /** + * If this object represents an array, this method returns the component + * type of the array. Otherwise, it returns null. + */ + public CtClass getComponentType() throws NotFoundException { + return null; + } + + /** + * Returns true if this class extends or implements + * clazz. It also returns true if + * this class is the same as clazz. + */ + public boolean subtypeOf(CtClass clazz) throws NotFoundException { + return this == clazz || getName().equals(clazz.getName()); + } + + /** + * Obtains the fully-qualified name of the class. + */ + public String getName() { return qualifiedName; } + + /** + * Obtains the not-qualified class name. + */ + public final String getSimpleName() { + String qname = qualifiedName; + int index = qname.lastIndexOf('.'); + if (index < 0) + return qname; + else + return qname.substring(index + 1); + } + + /** + * Obtains the package name. It may be null. + */ + public final String getPackageName() { + String qname = qualifiedName; + int index = qname.lastIndexOf('.'); + if (index < 0) + return null; + else + return qname.substring(0, index); + } + + /** + * Sets the class name + * + * @param name fully-qualified name + */ + public void setName(String name) { + checkModify(); + if (name != null) + qualifiedName = name; + } + + /** + * Returns the generic signature of the class. + * + *

The generics of Java is implemented by the erasure technique. + * After compilation, all type parameters are dropped off from the + * main part of a class file. However, for reflection, the type + * parameters are encoded into generic signatures and attached + * to a class file. + * + * @return null if the generic signature is not included. + * @see javassist.bytecode.SignatureAttribute#toClassSignature(String) + * @see CtMember#getGenericSignature() + * @since 3.17 + */ + public String getGenericSignature() { return null; } + + /** + * Sets the generic signature of the class. + * + *

The generics of Java is implemented by the erasure technique. + * After compilation, all type parameters are dropped off from the + * main part of a class file. However, for reflection, the type + * parameters must be encoded into generic signatures and attached + * to a class file. + * + *

For example, + * + * 

class List<T> {
+     *     T value;
+     *     T get() { return value; }
+     *     void set(T v) { value = v; }
+     * }
+     *
+ * + *

this class is generated by the following code: + * + * 

+     * ClassPool pool = ClassPool.getDefault();
+     * CtClass cc = pool.makeClass("List");
+     * CtClass objectClass = pool.get(CtClass.javaLangObject);
+     * ClassSignature cs = new ClassSignature(
+     *                         new TypeParameter[] { new TypeParameter("T") });
+     * cc.setGenericSignature(cs.encode());    // <T:Ljava/lang/Object;>Ljava/lang/Object;
+     *
+     * CtField f = new CtField(objClass, "value", cc);
+     * TypeVariable tvar = new TypeVariable("T");
+     * f.setGenericSignature(tvar.encode());   // TT;
+     * cc.addField(f);
+     *
+     * CtMethod m = CtNewMethod.make("public Object get(){return value;}", cc);
+     * MethodSignature ms = new MethodSignature(null, null, tvar, null);
+     * m.setGenericSignature(ms.encode());     // ()TT;
+     * cc.addMethod(m);
+     *
+     * CtMethod m2 = CtNewMethod.make("public void set(Object v){value = v;}", cc);
+     * MethodSignature ms2 = new MethodSignature(null, new Type[] { tvar },
+     *                                           new BaseType("void"), null);
+     * m2.setGenericSignature(ms2.encode());   // (TT;)V;
+     * cc.addMethod(m2);
+     *
+     * cc.writeFile();
+     *
+ * + *

The generated class file is equivalent to the following: + * + * 

class List {
+     *     Object value;
+     *     Object get() { return value; }
+     *     void set(Object v) { value = v; }
+     * }
+ * + *

but it includes generic signatures for the class, the field, + * and the methods so that the type variable T can be + * accessible through reflection. + * + *

MethodSignature is a utility class. You can directly + * pass the signature string to the setGenericSignature method. + * For the specification of the signatures, see Section 4.7.9.1 Signatures + * of The Java Virtual Machine Specification (Java SE 8). + * + * @param sig a generic signature. + * @see javassist.bytecode.SignatureAttribute.ClassSignature#encode() + * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() + * @see CtMember#setGenericSignature(String) + * @since 3.17 + */ + public void setGenericSignature(String sig) { checkModify(); } + + /** + * Substitutes newName for all occurrences of a class + * name oldName in the class file. + * + * @param oldName replaced class name + * @param newName substituted class name + */ + public void replaceClassName(String oldName, String newName) { + checkModify(); + } + + /** + * Changes class names appearing in the class file according to the + * given map. + * + *

All the class names appearing in the class file are tested + * with map to determine whether each class name is + * replaced or not. Thus this method can be used for collecting + * all the class names in the class file. To do that, first define + * a subclass of ClassMap so that get() + * records all the given parameters. Then, make an instance of + * that subclass as an empty hash-table. Finally, pass that instance + * to this method. After this method finishes, that instance would + * contain all the class names appearing in the class file. + * + * @param map the hashtable associating replaced class names + * with substituted names. + */ + public void replaceClassName(ClassMap map) { + checkModify(); + } + + /** + * Returns a collection of the names of all the classes + * referenced in this class. + * That collection includes the name of this class. + * + *

This method may return null. + * + * @return a Collection<String> object. + */ + public synchronized Collection getRefClasses() { + ClassFile cf = getClassFile2(); + if (cf != null) { + ClassMap cm = new ClassMap() { + public void put(String oldname, String newname) { + put0(oldname, newname); + } + + public Object get(Object jvmClassName) { + String n = toJavaName((String)jvmClassName); + put0(n, n); + return null; + } + + public void fix(String name) {} + }; + cf.getRefClasses(cm); + return cm.values(); + } + else + return null; + } + + /** + * Determines whether this object represents a class or an interface. + * It returns true if this object represents an interface. + */ + public boolean isInterface() { + return false; + } + + /** + * Determines whether this object represents an annotation type. + * It returns true if this object represents an annotation type. + * + * @since 3.2 + */ + public boolean isAnnotation() { + return false; + } + + /** + * Determines whether this object represents an enum. + * It returns true if this object represents an enum. + * + * @since 3.2 + */ + public boolean isEnum() { + return false; + } + + /** + * Returns the modifiers for this class, encoded in an integer. + * For decoding, use javassist.Modifier. + * + *

If the class is a static nested class (a.k.a. static inner class), + * the returned modifiers include Modifier.STATIC. + * + * @see Modifier + */ + public int getModifiers() { + return 0; + } + + /** + * Returns true if the class has the specified annotation class. + * + * @param clz the annotation class. + * @return true if the annotation is found, otherwise false. + * @since 3.11 + */ + public boolean hasAnnotation(Class clz) { + return false; + } + + /** + * Returns the annotation if the class has the specified annotation class. + * For example, if an annotation @Author is associated + * with this class, an Author object is returned. + * The member values can be obtained by calling methods on + * the Author object. + * + * @param clz the annotation class. + * @return the annotation if found, otherwise null. + * @since 3.11 + */ + public Object getAnnotation(Class clz) throws ClassNotFoundException { + return null; + } + + /** + * Returns the annotations associated with this class. + * For example, if an annotation @Author is associated + * with this class, the returned array contains an Author + * object. The member values can be obtained by calling methods on + * the Author object. + * + * @return an array of annotation-type objects. + * @see CtMember#getAnnotations() + * @since 3.1 + */ + public Object[] getAnnotations() throws ClassNotFoundException { + return new Object[0]; + } + + /** + * Returns the annotations associated with this class. + * This method is equivalent to getAnnotations() + * except that, if any annotations are not on the classpath, + * they are not included in the returned array. + * + * @return an array of annotation-type objects. + * @see #getAnnotations() + * @see CtMember#getAvailableAnnotations() + * @since 3.3 + */ + public Object[] getAvailableAnnotations(){ + return new Object[0]; + } + + /** + * Returns an array of nested classes declared in the class. + * Nested classes are inner classes, anonymous classes, local classes, + * and static nested classes. This simply calls getNestedClasses(). + * + * @see #getNestedClasses() + * @since 3.15 + */ + public CtClass[] getDeclaredClasses() throws NotFoundException { + return getNestedClasses(); + } + + /** + * Returns an array of nested classes declared in the class. + * Nested classes are inner classes, anonymous classes, local classes, + * and static nested classes. + * + * @since 3.2 + */ + public CtClass[] getNestedClasses() throws NotFoundException { + return new CtClass[0]; + } + + /** + * Sets the modifiers. + * + *

If the class is a nested class, this method also modifies + * the class declaring that nested class (i.e. the enclosing + * class is modified). + * + * @param mod modifiers encoded by + * javassist.Modifier + * @see Modifier + */ + public void setModifiers(int mod) { + checkModify(); + } + + /** + * Determines whether the class directly or indirectly extends + * the given class. If this class extends a class A and + * the class A extends a class B, then subclassof(B) returns true. + * + *

This method returns true if the given class is identical to + * the class represented by this object. + */ + public boolean subclassOf(CtClass superclass) { + return false; + } + + /** + * Obtains the class object representing the superclass of the + * class. + * It returns null if this object represents the + * java.lang.Object class and thus it does not have + * the super class. + * + *

If this object represents an interface, this method + * always returns the java.lang.Object class. + * To obtain the super interfaces + * extended by that interface, call getInterfaces(). + */ + public CtClass getSuperclass() throws NotFoundException { + return null; + } + + /** + * Changes a super class unless this object represents an interface. + * The new super class must be compatible with the old one; for example, + * it should inherit from the old super class. + * + *

If this object represents an interface, this method is equivalent + * to addInterface(); it appends clazz to + * the list of the super interfaces extended by that interface. + * Note that an interface can extend multiple super interfaces. + * + * @see #replaceClassName(String, String) + * @see #replaceClassName(ClassMap) + */ + public void setSuperclass(CtClass clazz) throws CannotCompileException { + checkModify(); + } + + /** + * Obtains the class objects representing the interfaces implemented + * by the class or, if this object represents an interface, the interfaces + * extended by that interface. + */ + public CtClass[] getInterfaces() throws NotFoundException { + return new CtClass[0]; + } + + /** + * Sets implemented interfaces. If this object represents an interface, + * this method sets the interfaces extended by that interface. + * + * @param list a list of the CtClass objects + * representing interfaces, or + * null if the class implements + * no interfaces. + */ + public void setInterfaces(CtClass[] list) { + checkModify(); + } + + /** + * Adds an interface. + * + * @param anInterface the added interface. + */ + public void addInterface(CtClass anInterface) { + checkModify(); + } + + /** + * If this class is a member class or interface of another class, + * then the class enclosing this class is returned. + * + * @return null if this class is a top-level class or an anonymous class. + */ + public CtClass getDeclaringClass() throws NotFoundException { + return null; + } + + /** + * Returns the immediately enclosing method of this class. + * This method works only with JDK 1.5 or later. + * + * @return null if this class is not a local class or an anonymous + * class. + * @deprecated The enclosing method might be a constructor. + * Use {@link #getEnclosingBehavior()}. + * @see #getEnclosingBehavior() + */ + public final CtMethod getEnclosingMethod() throws NotFoundException { + CtBehavior b = getEnclosingBehavior(); + if (b == null) + return null; + else if (b instanceof CtMethod) + return (CtMethod)b; + else + throw new NotFoundException(b.getLongName() + " is enclosing " + getName()); + } + + /** + * Returns the immediately enclosing method of this class. + * It might be not a method but a constructor. + * This method works only with JDK 1.5 or later. + * + * @return null if this class is not a local class or an anonymous + * class. + */ + public CtBehavior getEnclosingBehavior() throws NotFoundException { + return null; + } + + /** + * Makes a new public nested class. If this method is called, + * the CtClass, which encloses the nested class, is modified + * since a class file includes a list of nested classes. + * + *

The current implementation only supports a static nested class. + * isStatic must be true. + * + * @param name the simple name of the nested class. + * @param isStatic true if the nested class is static. + */ + public CtClass makeNestedClass(String name, boolean isStatic) { + throw new RuntimeException(getName() + " is not a class"); + } + + /** + * Returns an array containing CtField objects + * representing all the non-private fields of the class. + * That array includes non-private fields inherited from the + * superclasses. + */ + public CtField[] getFields() { return new CtField[0]; } + + /** + * Returns the field with the specified name. The returned field + * may be a private field declared in a super class or interface. + */ + public CtField getField(String name) throws NotFoundException { + return getField(name, null); + } + + /** + * Returns the field with the specified name and type. The returned field + * may be a private field declared in a super class or interface. + * Unlike Java, the JVM allows a class to have + * multiple fields with the same name but different types. + * + * @param name the field name. + * @param desc the type descriptor of the field. It is available by + * {@link CtField#getSignature()}. + * @see CtField#getSignature() + */ + public CtField getField(String name, String desc) throws NotFoundException { + throw new NotFoundException(name); + } + + /** + * @return null if the specified field is not found. + */ + CtField getField2(String name, String desc) { return null; } + + /** + * Gets all the fields declared in the class. The inherited fields + * are not included. + * + *

Note: the result does not include inherited fields. + */ + public CtField[] getDeclaredFields() { return new CtField[0]; } + + /** + * Retrieves the field with the specified name among the fields + * declared in the class. + * + *

Note: this method does not search the super classes. + */ + public CtField getDeclaredField(String name) throws NotFoundException { + throw new NotFoundException(name); + } + + /** + * Retrieves the field with the specified name and type among the fields + * declared in the class. Unlike Java, the JVM allows a class to have + * multiple fields with the same name but different types. + * + *

Note: this method does not search the super classes. + * + * @param name the field name. + * @param desc the type descriptor of the field. It is available by + * {@link CtField#getSignature()}. + * @see CtField#getSignature() + */ + public CtField getDeclaredField(String name, String desc) throws NotFoundException { + throw new NotFoundException(name); + } + + /** + * Gets all the constructors and methods declared in the class. + */ + public CtBehavior[] getDeclaredBehaviors() { + return new CtBehavior[0]; + } + + /** + * Returns an array containing CtConstructor objects + * representing all the non-private constructors of the class. + */ + public CtConstructor[] getConstructors() { + return new CtConstructor[0]; + } + + /** + * Returns the constructor with the given signature, + * which is represented by a character string + * called method descriptor. + * For details of the method descriptor, see the JVM specification + * or javassist.bytecode.Descriptor. + * + * @param desc method descriptor + * @see javassist.bytecode.Descriptor + */ + public CtConstructor getConstructor(String desc) + throws NotFoundException + { + throw new NotFoundException("no such constructor"); + } + + /** + * Gets all the constructors declared in the class. + * + * @see javassist.CtConstructor + */ + public CtConstructor[] getDeclaredConstructors() { + return new CtConstructor[0]; + } + + /** + * Returns a constructor receiving the specified parameters. + * + * @param params parameter types. + */ + public CtConstructor getDeclaredConstructor(CtClass[] params) + throws NotFoundException + { + String desc = Descriptor.ofConstructor(params); + return getConstructor(desc); + } + + /** + * Gets the class initializer (static constructor) + * declared in the class. + * This method returns null if + * no class initializer is not declared. + * + * @see #makeClassInitializer() + * @see javassist.CtConstructor + */ + public CtConstructor getClassInitializer() { + return null; + } + + /** + * Returns an array containing CtMethod objects + * representing all the non-private methods of the class. + * That array includes non-private methods inherited from the + * superclasses. + */ + public CtMethod[] getMethods() { + return new CtMethod[0]; + } + + /** + * Returns the method with the given name and signature. + * The returned method may be declared in a super class. + * The method signature is represented by a character string + * called method descriptor, + * which is defined in the JVM specification. + * + * @param name method name + * @param desc method descriptor + * @see CtBehavior#getSignature() + * @see javassist.bytecode.Descriptor + */ + public CtMethod getMethod(String name, String desc) + throws NotFoundException + { + throw new NotFoundException(name); + } + + /** + * Gets all methods declared in the class. The inherited methods + * are not included. + * + * @see javassist.CtMethod + */ + public CtMethod[] getDeclaredMethods() { + return new CtMethod[0]; + } + + /** + * Retrieves the method with the specified name and parameter types + * among the methods declared in the class. + * + *

Note: this method does not search the superclasses. + * + * @param name method name + * @param params parameter types + * @see javassist.CtMethod + */ + public CtMethod getDeclaredMethod(String name, CtClass[] params) + throws NotFoundException + { + throw new NotFoundException(name); + } + + /** + * Retrieves methods with the specified name among the methods + * declared in the class. Multiple methods with different parameters + * may be returned. + * + *

Note: this method does not search the superclasses.

+ * + * @param name method name. + * @since 3.19 + */ + public CtMethod[] getDeclaredMethods(String name) throws NotFoundException { + throw new NotFoundException(name); + } + + /** + * Retrieves the method with the specified name among the methods + * declared in the class. If there are multiple methods with + * the specified name, then this method returns one of them. + * + *

Note: this method does not search the superclasses. + * + * @see javassist.CtMethod + */ + public CtMethod getDeclaredMethod(String name) throws NotFoundException { + throw new NotFoundException(name); + } + + /** + * Makes an empty class initializer (static constructor). + * If the class already includes a class initializer, + * this method returns it. + * + * @see #getClassInitializer() + */ + public CtConstructor makeClassInitializer() + throws CannotCompileException + { + throw new CannotCompileException("not a class"); + } + + /** + * Adds a constructor. To add a class initializer (static constructor), + * call makeClassInitializer(). + * + * @see #makeClassInitializer() + */ + public void addConstructor(CtConstructor c) + throws CannotCompileException + { + checkModify(); + } + + /** + * Removes a constructor declared in this class. + * + * @param c removed constructor. + * @throws NotFoundException if the constructor is not found. + */ + public void removeConstructor(CtConstructor c) throws NotFoundException { + checkModify(); + } + + /** + * Adds a method. + */ + public void addMethod(CtMethod m) throws CannotCompileException { + checkModify(); + } + + /** + * Removes a method declared in this class. + * + * @param m removed method. + * @throws NotFoundException if the method is not found. + */ + public void removeMethod(CtMethod m) throws NotFoundException { + checkModify(); + } + + /** + * Adds a field. + * + *

The CtField belonging to another + * CtClass cannot be directly added to this class. + * Only a field created for this class can be added. + * + * @see javassist.CtField#CtField(CtField,CtClass) + */ + public void addField(CtField f) throws CannotCompileException { + addField(f, (CtField.Initializer)null); + } + + /** + * Adds a field with an initial value. + * + *

The CtField belonging to another + * CtClass cannot be directly added to this class. + * Only a field created for this class can be added. + * + *

The initial value is given as an expression written in Java. + * Any regular Java expression can be used for specifying the initial + * value. The followings are examples. + * + * 

+     * cc.addField(f, "0")               // the initial value is 0.
+     * cc.addField(f, "i + 1")           // i + 1.
+     * cc.addField(f, "new Point()");    // a Point object.
+     *
+ * + *

Here, the type of variable cc is CtClass. + * The type of f is CtField. + * + *

Note: do not change the modifier of the field + * (in particular, do not add or remove static + * to/from the modifier) + * after it is added to the class by addField(). + * + * @param init an expression for the initial value. + * + * @see javassist.CtField.Initializer#byExpr(String) + * @see javassist.CtField#CtField(CtField,CtClass) + */ + public void addField(CtField f, String init) + throws CannotCompileException + { + checkModify(); + } + + /** + * Adds a field with an initial value. + * + *

The CtField belonging to another + * CtClass cannot be directly added to this class. + * Only a field created for this class can be added. + * + *

For example, + * + * 

+     * CtClass cc = ...;
+     * addField(new CtField(CtClass.intType, "i", cc),
+     *          CtField.Initializer.constant(1));
+     *
+ * + *

This code adds an int field named "i". The + * initial value of this field is 1. + * + * @param init specifies the initial value of the field. + * + * @see javassist.CtField#CtField(CtField,CtClass) + */ + public void addField(CtField f, CtField.Initializer init) + throws CannotCompileException + { + checkModify(); + } + + /** + * Removes a field declared in this class. + * + * @param f removed field. + * @throws NotFoundException if the field is not found. + */ + public void removeField(CtField f) throws NotFoundException { + checkModify(); + } + + /** + * Obtains an attribute with the given name. + * If that attribute is not found in the class file, this + * method returns null. + * + *

This is a convenient method mainly for obtaining + * a user-defined attribute. For dealing with attributes, see the + * javassist.bytecode package. For example, the following + * expression returns all the attributes of a class file. + * + * 

+     * getClassFile().getAttributes()
+     *
+ * + * @param name attribute name + * @see javassist.bytecode.AttributeInfo + */ + public byte[] getAttribute(String name) { + return null; + } + + /** + * Adds a named attribute. + * An arbitrary data (smaller than 64Kb) can be saved in the class + * file. Some attribute name are reserved by the JVM. + * The attributes with the non-reserved names are ignored when a + * class file is loaded into the JVM. + * If there is already an attribute with + * the same name, this method substitutes the new one for it. + * + *

This is a convenient method mainly for adding + * a user-defined attribute. For dealing with attributes, see the + * javassist.bytecode package. For example, the following + * expression adds an attribute info to a class file. + * + * 

+     * getClassFile().addAttribute(info)
+     *
+ * + * @param name attribute name + * @param data attribute value + * @see javassist.bytecode.AttributeInfo + */ + public void setAttribute(String name, byte[] data) { + checkModify(); + } + + /** + * Applies the given converter to all methods and constructors + * declared in the class. This method calls instrument() + * on every CtMethod and CtConstructor object + * in the class. + * + * @param converter specifies how to modify. + */ + public void instrument(CodeConverter converter) + throws CannotCompileException + { + checkModify(); + } + + /** + * Modifies the bodies of all methods and constructors + * declared in the class. This method calls instrument() + * on every CtMethod and CtConstructor object + * in the class. + * + * @param editor specifies how to modify. + */ + public void instrument(ExprEditor editor) + throws CannotCompileException + { + checkModify(); + } + + /** + * Converts this class to a java.lang.Class object. + * Once this method is called, further modifications are not + * allowed any more. + * To load the class, this method uses the context class loader + * of the current thread. If the program is running on some application + * server, the context class loader might be inappropriate to load the + * class. + * + *

This method is provided for convenience. If you need more + * complex functionality, you should write your own class loader. + * + *

Note: this method calls toClass() + * in ClassPool. + * + *

Warining: A Class object returned by this method may not + * work with a security manager or a signed jar file because a + * protection domain is not specified. + * + * @see #toClass(java.lang.ClassLoader,ProtectionDomain) + * @see ClassPool#toClass(CtClass) + */ + public Class toClass() throws CannotCompileException { + return getClassPool().toClass(this); + } + + /** + * Converts this class to a java.lang.Class object. + * Once this method is called, further modifications are not allowed + * any more. + * + *

The class file represented by this CtClass is + * loaded by the given class loader to construct a + * java.lang.Class object. Since a private method + * on the class loader is invoked through the reflection API, + * the caller must have permissions to do that. + * + *

An easy way to obtain ProtectionDomain object is + * to call getProtectionDomain() + * in java.lang.Class. It returns the domain that + * the class belongs to. + * + *

This method is provided for convenience. If you need more + * complex functionality, you should write your own class loader. + * + *

Note: this method calls toClass() + * in ClassPool. + * + * @param loader the class loader used to load this class. + * If it is null, the class loader returned by + * {@link ClassPool#getClassLoader()} is used. + * @param domain the protection domain that the class belongs to. + * If it is null, the default domain created + * by java.lang.ClassLoader is used. + * @see ClassPool#toClass(CtClass,java.lang.ClassLoader) + * @since 3.3 + */ + public Class toClass(ClassLoader loader, ProtectionDomain domain) + throws CannotCompileException + { + ClassPool cp = getClassPool(); + if (loader == null) + loader = cp.getClassLoader(); + + return cp.toClass(this, loader, domain); + } + + /** + * Converts this class to a java.lang.Class object. + * + *

Warining: A Class object returned by this method may not + * work with a security manager or a signed jar file because a + * protection domain is not specified. + * + * @deprecated Replaced by {@link #toClass(ClassLoader,ProtectionDomain)} + */ + public final Class toClass(ClassLoader loader) + throws CannotCompileException + { + return getClassPool().toClass(this, loader); + } + + /** + * Removes this CtClass object from the + * ClassPool. + * After this method is called, any method cannot be called on the + * removed CtClass object. + * + *

If get() in ClassPool is called + * with the name of the removed method, + * the ClassPool will read the class file again + * and constructs another CtClass object representing + * the same class. + */ + public void detach() { + ClassPool cp = getClassPool(); + CtClass obj = cp.removeCached(getName()); + if (obj != this) + cp.cacheCtClass(getName(), obj, false); + } + + /** + * Disallows (or allows) automatically pruning this CtClass + * object. + * + *

+ * Javassist can automatically prune a CtClass object + * when toBytecode() (or toClass(), + * writeFile()) is called. + * Since a ClassPool holds all instances of CtClass + * even after toBytecode() (or toClass(), + * writeFile()) is called, pruning may significantly + * save memory consumption. + * + *

If ClassPool.doPruning is true, the automatic pruning + * is on by default. Otherwise, it is off. The default value of + * ClassPool.doPruning is false. + * + * @param stop disallow pruning if true. Otherwise, allow. + * @return the previous status of pruning. true if pruning is already stopped. + * + * @see #detach() + * @see #prune() + * @see ClassPool#doPruning + */ + public boolean stopPruning(boolean stop) { return true; } + + /** + * Discards unnecessary attributes, in particular, + * CodeAttributes (method bodies) of the class, + * to minimize the memory footprint. + * After calling this method, the class is read only. + * It cannot be modified any more. + * Furthermore, toBytecode(), + * writeFile(), toClass(), + * or instrument() cannot be called. + * However, the method names and signatures in the class etc. + * are still accessible. + * + *

toBytecode(), writeFile(), and + * toClass() internally call this method if + * automatic pruning is on. + * + *

According to some experiments, pruning does not really reduce + * memory consumption. Only about 20%. Since pruning takes time, + * it might not pay off. So the automatic pruning is off by default. + * + * @see #stopPruning(boolean) + * @see #detach() + * @see ClassPool#doPruning + * + * @see #toBytecode() + * @see #toClass() + * @see #writeFile() + * @see #instrument(CodeConverter) + * @see #instrument(ExprEditor) + */ + public void prune() {} + + /* Called by get() in ClassPool. + * CtClassType overrides this method. + */ + void incGetCounter() {} + + /** + * If this method is called, the class file will be + * rebuilt when it is finally generated by + * toBytecode() and writeFile(). + * For a performance reason, the symbol table of the + * class file may contain unused entries, for example, + * after a method or a filed is deleted. + * This method + * removes those unused entries. This removal will + * minimize the size of the class file. + * + * @since 3.8.1 + */ + public void rebuildClassFile() {} + + /** + * Converts this class to a class file. + * Once this method is called, further modifications are not + * possible any more. + * + * @return the contents of the class file. + */ + public byte[] toBytecode() throws IOException, CannotCompileException { + ByteArrayOutputStream barray = new ByteArrayOutputStream(); + DataOutputStream out = new DataOutputStream(barray); + try { + toBytecode(out); + } + finally { + out.close(); + } + + return barray.toByteArray(); + } + + /** + * Writes a class file represented by this CtClass + * object in the current directory. + * Once this method is called, further modifications are not + * possible any more. + * + * @see #debugWriteFile() + */ + public void writeFile() + throws NotFoundException, IOException, CannotCompileException + { + writeFile("."); + } + + /** + * Writes a class file represented by this CtClass + * object on a local disk. + * Once this method is called, further modifications are not + * possible any more. + * + * @param directoryName it must end without a directory separator. + * @see #debugWriteFile(String) + */ + public void writeFile(String directoryName) + throws CannotCompileException, IOException + { + DataOutputStream out = makeFileOutput(directoryName); + try { + toBytecode(out); + } + finally { + out.close(); + } + } + + protected DataOutputStream makeFileOutput(String directoryName) { + String classname = getName(); + String filename = directoryName + File.separatorChar + + classname.replace('.', File.separatorChar) + ".class"; + int pos = filename.lastIndexOf(File.separatorChar); + if (pos > 0) { + String dir = filename.substring(0, pos); + if (!dir.equals(".")) + new File(dir).mkdirs(); + } + + return new DataOutputStream(new BufferedOutputStream( + new DelayedFileOutputStream(filename))); + } + + /** + * Writes a class file as writeFile() does although this + * method does not prune or freeze the class after writing the class + * file. Note that, once writeFile() or toBytecode() + * is called, it cannot be called again since the class is pruned and frozen. + * This method would be useful for debugging. + */ + public void debugWriteFile() { + debugWriteFile("."); + } + + /** + * Writes a class file as writeFile() does although this + * method does not prune or freeze the class after writing the class + * file. Note that, once writeFile() or toBytecode() + * is called, it cannot be called again since the class is pruned and frozen. + * This method would be useful for debugging. + * + * @param directoryName it must end without a directory separator. + */ + public void debugWriteFile(String directoryName) { + try { + boolean p = stopPruning(true); + writeFile(directoryName); + defrost(); + stopPruning(p); + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + static class DelayedFileOutputStream extends OutputStream { + private FileOutputStream file; + private String filename; + + DelayedFileOutputStream(String name) { + file = null; + filename = name; + } + + private void init() throws IOException { + if (file == null) + file = new FileOutputStream(filename); + } + + public void write(int b) throws IOException { + init(); + file.write(b); + } + + public void write(byte[] b) throws IOException { + init(); + file.write(b); + } + + public void write(byte[] b, int off, int len) throws IOException { + init(); + file.write(b, off, len); + + } + + public void flush() throws IOException { + init(); + file.flush(); + } + + public void close() throws IOException { + init(); + file.close(); + } + } + + /** + * Converts this class to a class file. + * Once this method is called, further modifications are not + * possible any more. + * + *

This method dose not close the output stream in the end. + * + * @param out the output stream that a class file is written to. + */ + public void toBytecode(DataOutputStream out) + throws CannotCompileException, IOException + { + throw new CannotCompileException("not a class"); + } + + /** + * Makes a unique member name. This method guarantees that + * the returned name is not used as a prefix of any methods + * or fields visible in this class. + * If the returned name is XYZ, then any method or field names + * in this class do not start with XYZ. + * + * @param prefix the prefix of the member name. + */ + public String makeUniqueName(String prefix) { + throw new RuntimeException("not available in " + getName()); + } + + /* Invoked from ClassPool#compress(). + * This method is overridden by CtClassType. + */ + void compress() {} +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtClassType.java b/src/main/java/com/wenshuo/agent/javassist/CtClassType.java new file mode 100644 index 0000000..e7774e5 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtClassType.java @@ -0,0 +1,1761 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.lang.ref.WeakReference; +import java.io.BufferedInputStream; +import java.io.ByteArrayOutputStream; +import java.io.ByteArrayInputStream; +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.Hashtable; +import java.util.List; +import java.util.Set; + +import com.wenshuo.agent.javassist.bytecode.AccessFlag; +import com.wenshuo.agent.javassist.bytecode.AttributeInfo; +import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.Bytecode; +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.ConstantAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.EnclosingMethodAttribute; +import com.wenshuo.agent.javassist.bytecode.FieldInfo; +import com.wenshuo.agent.javassist.bytecode.InnerClassesAttribute; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.ParameterAnnotationsAttribute; +import com.wenshuo.agent.javassist.bytecode.SignatureAttribute; +import com.wenshuo.agent.javassist.bytecode.annotation.Annotation; +import com.wenshuo.agent.javassist.compiler.AccessorMaker; +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.expr.ExprEditor; + +/** + * Class types. + */ +class CtClassType extends CtClass { + ClassPool classPool; + boolean wasChanged; + private boolean wasFrozen; + boolean wasPruned; + boolean gcConstPool; // if true, the constant pool entries will be garbage collected. + ClassFile classfile; + byte[] rawClassfile; // backup storage + + private WeakReference memberCache; + private AccessorMaker accessors; + + private FieldInitLink fieldInitializers; + private Hashtable hiddenMethods; // must be synchronous + private int uniqueNumberSeed; + + private boolean doPruning = ClassPool.doPruning; + private int getCount; + private static final int GET_THRESHOLD = 2; // see compress() + + CtClassType(String name, ClassPool cp) { + super(name); + classPool = cp; + wasChanged = wasFrozen = wasPruned = gcConstPool = false; + classfile = null; + rawClassfile = null; + memberCache = null; + accessors = null; + fieldInitializers = null; + hiddenMethods = null; + uniqueNumberSeed = 0; + getCount = 0; + } + + CtClassType(InputStream ins, ClassPool cp) throws IOException { + this((String)null, cp); + classfile = new ClassFile(new DataInputStream(ins)); + qualifiedName = classfile.getName(); + } + + CtClassType(ClassFile cf, ClassPool cp) { + this((String)null, cp); + classfile = cf; + qualifiedName = classfile.getName(); + } + + protected void extendToString(StringBuffer buffer) { + if (wasChanged) + buffer.append("changed "); + + if (wasFrozen) + buffer.append("frozen "); + + if (wasPruned) + buffer.append("pruned "); + + buffer.append(Modifier.toString(getModifiers())); + buffer.append(" class "); + buffer.append(getName()); + + try { + CtClass ext = getSuperclass(); + if (ext != null) { + String name = ext.getName(); + if (!name.equals("java.lang.Object")) + buffer.append(" extends " + ext.getName()); + } + } + catch (NotFoundException e) { + buffer.append(" extends ??"); + } + + try { + CtClass[] intf = getInterfaces(); + if (intf.length > 0) + buffer.append(" implements "); + + for (int i = 0; i < intf.length; ++i) { + buffer.append(intf[i].getName()); + buffer.append(", "); + } + } + catch (NotFoundException e) { + buffer.append(" extends ??"); + } + + CtMember.Cache memCache = getMembers(); + exToString(buffer, " fields=", + memCache.fieldHead(), memCache.lastField()); + exToString(buffer, " constructors=", + memCache.consHead(), memCache.lastCons()); + exToString(buffer, " methods=", + memCache.methodHead(), memCache.lastMethod()); + } + + private void exToString(StringBuffer buffer, String msg, + CtMember head, CtMember tail) { + buffer.append(msg); + while (head != tail) { + head = head.next(); + buffer.append(head); + buffer.append(", "); + } + } + + public AccessorMaker getAccessorMaker() { + if (accessors == null) + accessors = new AccessorMaker(this); + + return accessors; + } + + public ClassFile getClassFile2() { + ClassFile cfile = classfile; + if (cfile != null) + return cfile; + + classPool.compress(); + if (rawClassfile != null) { + try { + classfile = new ClassFile(new DataInputStream( + new ByteArrayInputStream(rawClassfile))); + rawClassfile = null; + getCount = GET_THRESHOLD; + return classfile; + } + catch (IOException e) { + throw new RuntimeException(e.toString(), e); + } + } + + InputStream fin = null; + try { + fin = classPool.openClassfile(getName()); + if (fin == null) + throw new NotFoundException(getName()); + + fin = new BufferedInputStream(fin); + ClassFile cf = new ClassFile(new DataInputStream(fin)); + if (!cf.getName().equals(qualifiedName)) + throw new RuntimeException("cannot find " + qualifiedName + ": " + + cf.getName() + " found in " + + qualifiedName.replace('.', '/') + ".class"); + + classfile = cf; + return cf; + } + catch (NotFoundException e) { + throw new RuntimeException(e.toString(), e); + } + catch (IOException e) { + throw new RuntimeException(e.toString(), e); + } + finally { + if (fin != null) + try { + fin.close(); + } + catch (IOException e) {} + } + } + + /* Inherited from CtClass. Called by get() in ClassPool. + * + * @see javassist.CtClass#incGetCounter() + * @see #toBytecode(DataOutputStream) + */ + final void incGetCounter() { ++getCount; } + + /** + * Invoked from ClassPool#compress(). + * It releases the class files that have not been recently used + * if they are unmodified. + */ + void compress() { + if (getCount < GET_THRESHOLD) + if (!isModified() && ClassPool.releaseUnmodifiedClassFile) + removeClassFile(); + else if (isFrozen() && !wasPruned) + saveClassFile(); + + getCount = 0; + } + + /** + * Converts a ClassFile object into a byte array + * for saving memory space. + */ + private synchronized void saveClassFile() { + /* getMembers() and releaseClassFile() are also synchronized. + */ + if (classfile == null || hasMemberCache() != null) + return; + + ByteArrayOutputStream barray = new ByteArrayOutputStream(); + DataOutputStream out = new DataOutputStream(barray); + try { + classfile.write(out); + barray.close(); + rawClassfile = barray.toByteArray(); + classfile = null; + } + catch (IOException e) {} + } + + private synchronized void removeClassFile() { + if (classfile != null && !isModified() && hasMemberCache() == null) + classfile = null; + } + + public ClassPool getClassPool() { return classPool; } + + void setClassPool(ClassPool cp) { classPool = cp; } + + public URL getURL() throws NotFoundException { + URL url = classPool.find(getName()); + if (url == null) + throw new NotFoundException(getName()); + else + return url; + } + + public boolean isModified() { return wasChanged; } + + public boolean isFrozen() { return wasFrozen; } + + public void freeze() { wasFrozen = true; } + + void checkModify() throws RuntimeException { + if (isFrozen()) { + String msg = getName() + " class is frozen"; + if (wasPruned) + msg += " and pruned"; + + throw new RuntimeException(msg); + } + + wasChanged = true; + } + + public void defrost() { + checkPruned("defrost"); + wasFrozen = false; + } + + public boolean subtypeOf(CtClass clazz) throws NotFoundException { + int i; + String cname = clazz.getName(); + if (this == clazz || getName().equals(cname)) + return true; + + ClassFile file = getClassFile2(); + String supername = file.getSuperclass(); + if (supername != null && supername.equals(cname)) + return true; + + String[] ifs = file.getInterfaces(); + int num = ifs.length; + for (i = 0; i < num; ++i) + if (ifs[i].equals(cname)) + return true; + + if (supername != null && classPool.get(supername).subtypeOf(clazz)) + return true; + + for (i = 0; i < num; ++i) + if (classPool.get(ifs[i]).subtypeOf(clazz)) + return true; + + return false; + } + + public void setName(String name) throws RuntimeException { + String oldname = getName(); + if (name.equals(oldname)) + return; + + // check this in advance although classNameChanged() below does. + classPool.checkNotFrozen(name); + ClassFile cf = getClassFile2(); + super.setName(name); + cf.setName(name); + nameReplaced(); + classPool.classNameChanged(oldname, this); + } + + public String getGenericSignature() { + SignatureAttribute sa + = (SignatureAttribute)getClassFile2().getAttribute(SignatureAttribute.tag); + return sa == null ? null : sa.getSignature(); + } + + public void setGenericSignature(String sig) { + ClassFile cf = getClassFile(); + SignatureAttribute sa = new SignatureAttribute(cf.getConstPool(), sig); + cf.addAttribute(sa); + } + + public void replaceClassName(ClassMap classnames) + throws RuntimeException + { + String oldClassName = getName(); + String newClassName + = (String)classnames.get(Descriptor.toJvmName(oldClassName)); + if (newClassName != null) { + newClassName = Descriptor.toJavaName(newClassName); + // check this in advance although classNameChanged() below does. + classPool.checkNotFrozen(newClassName); + } + + super.replaceClassName(classnames); + ClassFile cf = getClassFile2(); + cf.renameClass(classnames); + nameReplaced(); + + if (newClassName != null) { + super.setName(newClassName); + classPool.classNameChanged(oldClassName, this); + } + } + + public void replaceClassName(String oldname, String newname) + throws RuntimeException + { + String thisname = getName(); + if (thisname.equals(oldname)) + setName(newname); + else { + super.replaceClassName(oldname, newname); + getClassFile2().renameClass(oldname, newname); + nameReplaced(); + } + } + + public boolean isInterface() { + return Modifier.isInterface(getModifiers()); + } + + public boolean isAnnotation() { + return Modifier.isAnnotation(getModifiers()); + } + + public boolean isEnum() { + return Modifier.isEnum(getModifiers()); + } + + public int getModifiers() { + ClassFile cf = getClassFile2(); + int acc = cf.getAccessFlags(); + acc = AccessFlag.clear(acc, AccessFlag.SUPER); + int inner = cf.getInnerAccessFlags(); + if (inner != -1 && (inner & AccessFlag.STATIC) != 0) + acc |= AccessFlag.STATIC; + + return AccessFlag.toModifier(acc); + } + + public CtClass[] getNestedClasses() throws NotFoundException { + ClassFile cf = getClassFile2(); + InnerClassesAttribute ica + = (InnerClassesAttribute)cf.getAttribute(InnerClassesAttribute.tag); + if (ica == null) + return new CtClass[0]; + + String thisName = cf.getName() + "$"; + int n = ica.tableLength(); + ArrayList list = new ArrayList(n); + for (int i = 0; i < n; i++) { + String name = ica.innerClass(i); + if (name != null) + if (name.startsWith(thisName)) { + // if it is an immediate nested class + if (name.lastIndexOf('$') < thisName.length()) + list.add(classPool.get(name)); + } + } + + return (CtClass[])list.toArray(new CtClass[list.size()]); + } + + public void setModifiers(int mod) { + ClassFile cf = getClassFile2(); + if (Modifier.isStatic(mod)) { + int flags = cf.getInnerAccessFlags(); + if (flags != -1 && (flags & AccessFlag.STATIC) != 0) + mod = mod & ~Modifier.STATIC; + else + throw new RuntimeException("cannot change " + getName() + " into a static class"); + } + + checkModify(); + cf.setAccessFlags(AccessFlag.of(mod)); + } + + public boolean hasAnnotation(Class clz) { + ClassFile cf = getClassFile2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.visibleTag); + return hasAnnotationType(clz, getClassPool(), ainfo, ainfo2); + } + + static boolean hasAnnotationType(Class clz, ClassPool cp, + AnnotationsAttribute a1, AnnotationsAttribute a2) + { + Annotation[] anno1, anno2; + + if (a1 == null) + anno1 = null; + else + anno1 = a1.getAnnotations(); + + if (a2 == null) + anno2 = null; + else + anno2 = a2.getAnnotations(); + + String typeName = clz.getName(); + if (anno1 != null) + for (int i = 0; i < anno1.length; i++) + if (anno1[i].getTypeName().equals(typeName)) + return true; + + if (anno2 != null) + for (int i = 0; i < anno2.length; i++) + if (anno2[i].getTypeName().equals(typeName)) + return true; + + return false; + } + + public Object getAnnotation(Class clz) throws ClassNotFoundException { + ClassFile cf = getClassFile2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.visibleTag); + return getAnnotationType(clz, getClassPool(), ainfo, ainfo2); + } + + static Object getAnnotationType(Class clz, ClassPool cp, + AnnotationsAttribute a1, AnnotationsAttribute a2) + throws ClassNotFoundException + { + Annotation[] anno1, anno2; + + if (a1 == null) + anno1 = null; + else + anno1 = a1.getAnnotations(); + + if (a2 == null) + anno2 = null; + else + anno2 = a2.getAnnotations(); + + String typeName = clz.getName(); + if (anno1 != null) + for (int i = 0; i < anno1.length; i++) + if (anno1[i].getTypeName().equals(typeName)) + return toAnnoType(anno1[i], cp); + + if (anno2 != null) + for (int i = 0; i < anno2.length; i++) + if (anno2[i].getTypeName().equals(typeName)) + return toAnnoType(anno2[i], cp); + + return null; + } + + public Object[] getAnnotations() throws ClassNotFoundException { + return getAnnotations(false); + } + + public Object[] getAvailableAnnotations(){ + try { + return getAnnotations(true); + } + catch (ClassNotFoundException e) { + throw new RuntimeException("Unexpected exception ", e); + } + } + + private Object[] getAnnotations(boolean ignoreNotFound) + throws ClassNotFoundException + { + ClassFile cf = getClassFile2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + cf.getAttribute(AnnotationsAttribute.visibleTag); + return toAnnotationType(ignoreNotFound, getClassPool(), ainfo, ainfo2); + } + + static Object[] toAnnotationType(boolean ignoreNotFound, ClassPool cp, + AnnotationsAttribute a1, AnnotationsAttribute a2) + throws ClassNotFoundException + { + Annotation[] anno1, anno2; + int size1, size2; + + if (a1 == null) { + anno1 = null; + size1 = 0; + } + else { + anno1 = a1.getAnnotations(); + size1 = anno1.length; + } + + if (a2 == null) { + anno2 = null; + size2 = 0; + } + else { + anno2 = a2.getAnnotations(); + size2 = anno2.length; + } + + if (!ignoreNotFound){ + Object[] result = new Object[size1 + size2]; + for (int i = 0; i < size1; i++) + result[i] = toAnnoType(anno1[i], cp); + + for (int j = 0; j < size2; j++) + result[j + size1] = toAnnoType(anno2[j], cp); + + return result; + } + else{ + ArrayList annotations = new ArrayList(); + for (int i = 0 ; i < size1 ; i++){ + try{ + annotations.add(toAnnoType(anno1[i], cp)); + } + catch(ClassNotFoundException e){} + } + for (int j = 0; j < size2; j++) { + try{ + annotations.add(toAnnoType(anno2[j], cp)); + } + catch(ClassNotFoundException e){} + } + + return annotations.toArray(); + } + } + + static Object[][] toAnnotationType(boolean ignoreNotFound, ClassPool cp, + ParameterAnnotationsAttribute a1, + ParameterAnnotationsAttribute a2, + MethodInfo minfo) + throws ClassNotFoundException + { + int numParameters = 0; + if (a1 != null) + numParameters = a1.numParameters(); + else if (a2 != null) + numParameters = a2.numParameters(); + else + numParameters = Descriptor.numOfParameters(minfo.getDescriptor()); + + Object[][] result = new Object[numParameters][]; + for (int i = 0; i < numParameters; i++) { + Annotation[] anno1, anno2; + int size1, size2; + + if (a1 == null) { + anno1 = null; + size1 = 0; + } + else { + anno1 = a1.getAnnotations()[i]; + size1 = anno1.length; + } + + if (a2 == null) { + anno2 = null; + size2 = 0; + } + else { + anno2 = a2.getAnnotations()[i]; + size2 = anno2.length; + } + + if (!ignoreNotFound){ + result[i] = new Object[size1 + size2]; + for (int j = 0; j < size1; ++j) + result[i][j] = toAnnoType(anno1[j], cp); + + for (int j = 0; j < size2; ++j) + result[i][j + size1] = toAnnoType(anno2[j], cp); + } + else{ + ArrayList annotations = new ArrayList(); + for (int j = 0 ; j < size1 ; j++){ + try{ + annotations.add(toAnnoType(anno1[j], cp)); + } + catch(ClassNotFoundException e){} + } + for (int j = 0; j < size2; j++){ + try{ + annotations.add(toAnnoType(anno2[j], cp)); + } + catch(ClassNotFoundException e){} + } + + result[i] = annotations.toArray(); + } + } + + return result; + } + + private static Object toAnnoType(Annotation anno, ClassPool cp) + throws ClassNotFoundException + { + try { + ClassLoader cl = cp.getClassLoader(); + return anno.toAnnotationType(cl, cp); + } + catch (ClassNotFoundException e) { + ClassLoader cl2 = cp.getClass().getClassLoader(); + try { + return anno.toAnnotationType(cl2, cp); + } + catch (ClassNotFoundException e2){ + try { + Class clazz = cp.get(anno.getTypeName()).toClass(); + return com.wenshuo.agent.javassist.bytecode.annotation.AnnotationImpl.make( + clazz.getClassLoader(), + clazz, cp, anno); + } + catch (Throwable e3) { + throw new ClassNotFoundException(anno.getTypeName()); + } + } + } + } + + public boolean subclassOf(CtClass superclass) { + if (superclass == null) + return false; + + String superName = superclass.getName(); + CtClass curr = this; + try { + while (curr != null) { + if (curr.getName().equals(superName)) + return true; + + curr = curr.getSuperclass(); + } + } + catch (Exception ignored) {} + return false; + } + + public CtClass getSuperclass() throws NotFoundException { + String supername = getClassFile2().getSuperclass(); + if (supername == null) + return null; + else + return classPool.get(supername); + } + + public void setSuperclass(CtClass clazz) throws CannotCompileException { + checkModify(); + if (isInterface()) + addInterface(clazz); + else + getClassFile2().setSuperclass(clazz.getName()); + } + + public CtClass[] getInterfaces() throws NotFoundException { + String[] ifs = getClassFile2().getInterfaces(); + int num = ifs.length; + CtClass[] ifc = new CtClass[num]; + for (int i = 0; i < num; ++i) + ifc[i] = classPool.get(ifs[i]); + + return ifc; + } + + public void setInterfaces(CtClass[] list) { + checkModify(); + String[] ifs; + if (list == null) + ifs = new String[0]; + else { + int num = list.length; + ifs = new String[num]; + for (int i = 0; i < num; ++i) + ifs[i] = list[i].getName(); + } + + getClassFile2().setInterfaces(ifs); + } + + public void addInterface(CtClass anInterface) { + checkModify(); + if (anInterface != null) + getClassFile2().addInterface(anInterface.getName()); + } + + public CtClass getDeclaringClass() throws NotFoundException { + ClassFile cf = getClassFile2(); + InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( + InnerClassesAttribute.tag); + if (ica == null) + return null; + + String name = getName(); + int n = ica.tableLength(); + for (int i = 0; i < n; ++i) + if (name.equals(ica.innerClass(i))) { + String outName = ica.outerClass(i); + if (outName != null) + return classPool.get(outName); + else { + // maybe anonymous or local class. + EnclosingMethodAttribute ema + = (EnclosingMethodAttribute)cf.getAttribute( + EnclosingMethodAttribute.tag); + if (ema != null) + return classPool.get(ema.className()); + } + } + + return null; + } + + public CtBehavior getEnclosingBehavior() throws NotFoundException { + ClassFile cf = getClassFile2(); + EnclosingMethodAttribute ema + = (EnclosingMethodAttribute)cf.getAttribute( + EnclosingMethodAttribute.tag); + if (ema == null) + return null; + else { + CtClass enc = classPool.get(ema.className()); + String name = ema.methodName(); + if (MethodInfo.nameInit.equals(name)) + return enc.getConstructor(ema.methodDescriptor()); + else if(MethodInfo.nameClinit.equals(name)) + return enc.getClassInitializer(); + else + return enc.getMethod(name, ema.methodDescriptor()); + } + } + + public CtClass makeNestedClass(String name, boolean isStatic) { + if (!isStatic) + throw new RuntimeException( + "sorry, only nested static class is supported"); + + checkModify(); + CtClass c = classPool.makeNestedClass(getName() + "$" + name); + ClassFile cf = getClassFile2(); + ClassFile cf2 = c.getClassFile2(); + InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( + InnerClassesAttribute.tag); + if (ica == null) { + ica = new InnerClassesAttribute(cf.getConstPool()); + cf.addAttribute(ica); + } + + ica.append(c.getName(), this.getName(), name, + (cf2.getAccessFlags() & ~AccessFlag.SUPER) | AccessFlag.STATIC); + cf2.addAttribute(ica.copy(cf2.getConstPool(), null)); + return c; + } + + /* flush cached names. + */ + private void nameReplaced() { + CtMember.Cache cache = hasMemberCache(); + if (cache != null) { + CtMember mth = cache.methodHead(); + CtMember tail = cache.lastMethod(); + while (mth != tail) { + mth = mth.next(); + mth.nameReplaced(); + } + } + } + + /** + * Returns null if members are not cached. + */ + protected CtMember.Cache hasMemberCache() { + if (memberCache != null) + return (CtMember.Cache)memberCache.get(); + else + return null; + } + + protected synchronized CtMember.Cache getMembers() { + CtMember.Cache cache = null; + if (memberCache == null + || (cache = (CtMember.Cache)memberCache.get()) == null) { + cache = new CtMember.Cache(this); + makeFieldCache(cache); + makeBehaviorCache(cache); + memberCache = new WeakReference(cache); + } + + return cache; + } + + private void makeFieldCache(CtMember.Cache cache) { + List list = getClassFile2().getFields(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + CtField newField = new CtField(finfo, this); + cache.addField(newField); + } + } + + private void makeBehaviorCache(CtMember.Cache cache) { + List list = getClassFile2().getMethods(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + if (minfo.isMethod()) { + CtMethod newMethod = new CtMethod(minfo, this); + cache.addMethod(newMethod); + } + else { + CtConstructor newCons = new CtConstructor(minfo, this); + cache.addConstructor(newCons); + } + } + } + + public CtField[] getFields() { + ArrayList alist = new ArrayList(); + getFields(alist, this); + return (CtField[])alist.toArray(new CtField[alist.size()]); + } + + private static void getFields(ArrayList alist, CtClass cc) { + int i, num; + if (cc == null) + return; + + try { + getFields(alist, cc.getSuperclass()); + } + catch (NotFoundException e) {} + + try { + CtClass[] ifs = cc.getInterfaces(); + num = ifs.length; + for (i = 0; i < num; ++i) + getFields(alist, ifs[i]); + } + catch (NotFoundException e) {} + + CtMember.Cache memCache = ((CtClassType)cc).getMembers(); + CtMember field = memCache.fieldHead(); + CtMember tail = memCache.lastField(); + while (field != tail) { + field = field.next(); + if (!Modifier.isPrivate(field.getModifiers())) + alist.add(field); + } + } + + public CtField getField(String name, String desc) throws NotFoundException { + CtField f = getField2(name, desc); + return checkGetField(f, name, desc); + } + + private CtField checkGetField(CtField f, String name, String desc) + throws NotFoundException + { + if (f == null) { + String msg = "field: " + name; + if (desc != null) + msg += " type " + desc; + + throw new NotFoundException(msg + " in " + getName()); + } + else + return f; + } + + CtField getField2(String name, String desc) { + CtField df = getDeclaredField2(name, desc); + if (df != null) + return df; + + try { + CtClass[] ifs = getInterfaces(); + int num = ifs.length; + for (int i = 0; i < num; ++i) { + CtField f = ifs[i].getField2(name, desc); + if (f != null) + return f; + } + + CtClass s = getSuperclass(); + if (s != null) + return s.getField2(name, desc); + } + catch (NotFoundException e) {} + return null; + } + + public CtField[] getDeclaredFields() { + CtMember.Cache memCache = getMembers(); + CtMember field = memCache.fieldHead(); + CtMember tail = memCache.lastField(); + int num = CtMember.Cache.count(field, tail); + CtField[] cfs = new CtField[num]; + int i = 0; + while (field != tail) { + field = field.next(); + cfs[i++] = (CtField)field; + } + + return cfs; + } + + public CtField getDeclaredField(String name) throws NotFoundException { + return getDeclaredField(name, null); + } + + public CtField getDeclaredField(String name, String desc) throws NotFoundException { + CtField f = getDeclaredField2(name, desc); + return checkGetField(f, name, desc); + } + + private CtField getDeclaredField2(String name, String desc) { + CtMember.Cache memCache = getMembers(); + CtMember field = memCache.fieldHead(); + CtMember tail = memCache.lastField(); + while (field != tail) { + field = field.next(); + if (field.getName().equals(name) + && (desc == null || desc.equals(field.getSignature()))) + return (CtField)field; + } + + return null; + } + + public CtBehavior[] getDeclaredBehaviors() { + CtMember.Cache memCache = getMembers(); + CtMember cons = memCache.consHead(); + CtMember consTail = memCache.lastCons(); + int cnum = CtMember.Cache.count(cons, consTail); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + int mnum = CtMember.Cache.count(mth, mthTail); + + CtBehavior[] cb = new CtBehavior[cnum + mnum]; + int i = 0; + while (cons != consTail) { + cons = cons.next(); + cb[i++] = (CtBehavior)cons; + } + + while (mth != mthTail) { + mth = mth.next(); + cb[i++] = (CtBehavior)mth; + } + + return cb; + } + + public CtConstructor[] getConstructors() { + CtMember.Cache memCache = getMembers(); + CtMember cons = memCache.consHead(); + CtMember consTail = memCache.lastCons(); + + int n = 0; + CtMember mem = cons; + while (mem != consTail) { + mem = mem.next(); + if (isPubCons((CtConstructor)mem)) + n++; + } + + CtConstructor[] result = new CtConstructor[n]; + int i = 0; + mem = cons; + while (mem != consTail) { + mem = mem.next(); + CtConstructor cc = (CtConstructor)mem; + if (isPubCons(cc)) + result[i++] = cc; + } + + return result; + } + + private static boolean isPubCons(CtConstructor cons) { + return !Modifier.isPrivate(cons.getModifiers()) + && cons.isConstructor(); + } + + public CtConstructor getConstructor(String desc) + throws NotFoundException + { + CtMember.Cache memCache = getMembers(); + CtMember cons = memCache.consHead(); + CtMember consTail = memCache.lastCons(); + + while (cons != consTail) { + cons = cons.next(); + CtConstructor cc = (CtConstructor)cons; + if (cc.getMethodInfo2().getDescriptor().equals(desc) + && cc.isConstructor()) + return cc; + } + + return super.getConstructor(desc); + } + + public CtConstructor[] getDeclaredConstructors() { + CtMember.Cache memCache = getMembers(); + CtMember cons = memCache.consHead(); + CtMember consTail = memCache.lastCons(); + + int n = 0; + CtMember mem = cons; + while (mem != consTail) { + mem = mem.next(); + CtConstructor cc = (CtConstructor)mem; + if (cc.isConstructor()) + n++; + } + + CtConstructor[] result = new CtConstructor[n]; + int i = 0; + mem = cons; + while (mem != consTail) { + mem = mem.next(); + CtConstructor cc = (CtConstructor)mem; + if (cc.isConstructor()) + result[i++] = cc; + } + + return result; + } + + public CtConstructor getClassInitializer() { + CtMember.Cache memCache = getMembers(); + CtMember cons = memCache.consHead(); + CtMember consTail = memCache.lastCons(); + + while (cons != consTail) { + cons = cons.next(); + CtConstructor cc = (CtConstructor)cons; + if (cc.isClassInitializer()) + return cc; + } + + return null; + } + + public CtMethod[] getMethods() { + HashMap h = new HashMap(); + getMethods0(h, this); + return (CtMethod[])h.values().toArray(new CtMethod[h.size()]); + } + + private static void getMethods0(HashMap h, CtClass cc) { + try { + CtClass[] ifs = cc.getInterfaces(); + int size = ifs.length; + for (int i = 0; i < size; ++i) + getMethods0(h, ifs[i]); + } + catch (NotFoundException e) {} + + try { + CtClass s = cc.getSuperclass(); + if (s != null) + getMethods0(h, s); + } + catch (NotFoundException e) {} + + if (cc instanceof CtClassType) { + CtMember.Cache memCache = ((CtClassType)cc).getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + + while (mth != mthTail) { + mth = mth.next(); + if (!Modifier.isPrivate(mth.getModifiers())) + h.put(((CtMethod)mth).getStringRep(), mth); + } + } + } + + public CtMethod getMethod(String name, String desc) + throws NotFoundException + { + CtMethod m = getMethod0(this, name, desc); + if (m != null) + return m; + else + throw new NotFoundException(name + "(..) is not found in " + + getName()); + } + + private static CtMethod getMethod0(CtClass cc, + String name, String desc) { + if (cc instanceof CtClassType) { + CtMember.Cache memCache = ((CtClassType)cc).getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + + while (mth != mthTail) { + mth = mth.next(); + if (mth.getName().equals(name) + && ((CtMethod)mth).getMethodInfo2().getDescriptor().equals(desc)) + return (CtMethod)mth; + } + } + + try { + CtClass s = cc.getSuperclass(); + if (s != null) { + CtMethod m = getMethod0(s, name, desc); + if (m != null) + return m; + } + } + catch (NotFoundException e) {} + + try { + CtClass[] ifs = cc.getInterfaces(); + int size = ifs.length; + for (int i = 0; i < size; ++i) { + CtMethod m = getMethod0(ifs[i], name, desc); + if (m != null) + return m; + } + } + catch (NotFoundException e) {} + return null; + } + + public CtMethod[] getDeclaredMethods() { + CtMember.Cache memCache = getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + int num = CtMember.Cache.count(mth, mthTail); + CtMethod[] cms = new CtMethod[num]; + int i = 0; + while (mth != mthTail) { + mth = mth.next(); + cms[i++] = (CtMethod)mth; + } + + return cms; + } + + public CtMethod[] getDeclaredMethods(String name) throws NotFoundException { + CtMember.Cache memCache = getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + ArrayList methods = new ArrayList(); + while (mth != mthTail) { + mth = mth.next(); + if (mth.getName().equals(name)) + methods.add((CtMethod)mth); + } + + return methods.toArray(new CtMethod[methods.size()]); + } + + public CtMethod getDeclaredMethod(String name) throws NotFoundException { + CtMember.Cache memCache = getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + while (mth != mthTail) { + mth = mth.next(); + if (mth.getName().equals(name)) + return (CtMethod)mth; + } + + throw new NotFoundException(name + "(..) is not found in " + + getName()); + } + + public CtMethod getDeclaredMethod(String name, CtClass[] params) + throws NotFoundException + { + String desc = Descriptor.ofParameters(params); + CtMember.Cache memCache = getMembers(); + CtMember mth = memCache.methodHead(); + CtMember mthTail = memCache.lastMethod(); + + while (mth != mthTail) { + mth = mth.next(); + if (mth.getName().equals(name) + && ((CtMethod)mth).getMethodInfo2().getDescriptor().startsWith(desc)) + return (CtMethod)mth; + } + + throw new NotFoundException(name + "(..) is not found in " + + getName()); + } + + public void addField(CtField f, String init) + throws CannotCompileException + { + addField(f, CtField.Initializer.byExpr(init)); + } + + public void addField(CtField f, CtField.Initializer init) + throws CannotCompileException + { + checkModify(); + if (f.getDeclaringClass() != this) + throw new CannotCompileException("cannot add"); + + if (init == null) + init = f.getInit(); + + if (init != null) { + init.check(f.getSignature()); + int mod = f.getModifiers(); + if (Modifier.isStatic(mod) && Modifier.isFinal(mod)) + try { + ConstPool cp = getClassFile2().getConstPool(); + int index = init.getConstantValue(cp, f.getType()); + if (index != 0) { + f.getFieldInfo2().addAttribute(new ConstantAttribute(cp, index)); + init = null; + } + } + catch (NotFoundException e) {} + } + + getMembers().addField(f); + getClassFile2().addField(f.getFieldInfo2()); + + if (init != null) { + FieldInitLink fil = new FieldInitLink(f, init); + FieldInitLink link = fieldInitializers; + if (link == null) + fieldInitializers = fil; + else { + while (link.next != null) + link = link.next; + + link.next = fil; + } + } + } + + public void removeField(CtField f) throws NotFoundException { + checkModify(); + FieldInfo fi = f.getFieldInfo2(); + ClassFile cf = getClassFile2(); + if (cf.getFields().remove(fi)) { + getMembers().remove(f); + gcConstPool = true; + } + else + throw new NotFoundException(f.toString()); + } + + public CtConstructor makeClassInitializer() + throws CannotCompileException + { + CtConstructor clinit = getClassInitializer(); + if (clinit != null) + return clinit; + + checkModify(); + ClassFile cf = getClassFile2(); + Bytecode code = new Bytecode(cf.getConstPool(), 0, 0); + modifyClassConstructor(cf, code, 0, 0); + return getClassInitializer(); + } + + public void addConstructor(CtConstructor c) + throws CannotCompileException + { + checkModify(); + if (c.getDeclaringClass() != this) + throw new CannotCompileException("cannot add"); + + getMembers().addConstructor(c); + getClassFile2().addMethod(c.getMethodInfo2()); + } + + public void removeConstructor(CtConstructor m) throws NotFoundException { + checkModify(); + MethodInfo mi = m.getMethodInfo2(); + ClassFile cf = getClassFile2(); + if (cf.getMethods().remove(mi)) { + getMembers().remove(m); + gcConstPool = true; + } + else + throw new NotFoundException(m.toString()); + } + + public void addMethod(CtMethod m) throws CannotCompileException { + checkModify(); + if (m.getDeclaringClass() != this) + throw new CannotCompileException("bad declaring class"); + + int mod = m.getModifiers(); + if ((getModifiers() & Modifier.INTERFACE) != 0) { + m.setModifiers(mod | Modifier.PUBLIC); + if ((mod & Modifier.ABSTRACT) == 0) + throw new CannotCompileException( + "an interface method must be abstract: " + m.toString()); + } + + getMembers().addMethod(m); + getClassFile2().addMethod(m.getMethodInfo2()); + if ((mod & Modifier.ABSTRACT) != 0) + setModifiers(getModifiers() | Modifier.ABSTRACT); + } + + public void removeMethod(CtMethod m) throws NotFoundException { + checkModify(); + MethodInfo mi = m.getMethodInfo2(); + ClassFile cf = getClassFile2(); + if (cf.getMethods().remove(mi)) { + getMembers().remove(m); + gcConstPool = true; + } + else + throw new NotFoundException(m.toString()); + } + + public byte[] getAttribute(String name) { + AttributeInfo ai = getClassFile2().getAttribute(name); + if (ai == null) + return null; + else + return ai.get(); + } + + public void setAttribute(String name, byte[] data) { + checkModify(); + ClassFile cf = getClassFile2(); + cf.addAttribute(new AttributeInfo(cf.getConstPool(), name, data)); + } + + public void instrument(CodeConverter converter) + throws CannotCompileException + { + checkModify(); + ClassFile cf = getClassFile2(); + ConstPool cp = cf.getConstPool(); + List list = cf.getMethods(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + converter.doit(this, minfo, cp); + } + } + + public void instrument(ExprEditor editor) + throws CannotCompileException + { + checkModify(); + ClassFile cf = getClassFile2(); + List list = cf.getMethods(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + editor.doit(this, minfo); + } + } + + /** + * @see javassist.CtClass#prune() + * @see javassist.CtClass#stopPruning(boolean) + */ + public void prune() { + if (wasPruned) + return; + + wasPruned = wasFrozen = true; + getClassFile2().prune(); + } + + public void rebuildClassFile() { gcConstPool = true; } + + public void toBytecode(DataOutputStream out) + throws CannotCompileException, IOException + { + try { + if (isModified()) { + checkPruned("toBytecode"); + ClassFile cf = getClassFile2(); + if (gcConstPool) { + cf.compact(); + gcConstPool = false; + } + + modifyClassConstructor(cf); + modifyConstructors(cf); + if (debugDump != null) + dumpClassFile(cf); + + cf.write(out); + out.flush(); + fieldInitializers = null; + if (doPruning) { + // to save memory + cf.prune(); + wasPruned = true; + } + } + else { + classPool.writeClassfile(getName(), out); + // to save memory + // classfile = null; + } + + getCount = 0; + wasFrozen = true; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (IOException e) { + throw new CannotCompileException(e); + } + } + + private void dumpClassFile(ClassFile cf) throws IOException { + DataOutputStream dump = makeFileOutput(debugDump); + try { + cf.write(dump); + } + finally { + dump.close(); + } + } + + /* See also checkModified() + */ + private void checkPruned(String method) { + if (wasPruned) + throw new RuntimeException(method + "(): " + getName() + + " was pruned."); + } + + public boolean stopPruning(boolean stop) { + boolean prev = !doPruning; + doPruning = !stop; + return prev; + } + + private void modifyClassConstructor(ClassFile cf) + throws CannotCompileException, NotFoundException + { + if (fieldInitializers == null) + return; + + Bytecode code = new Bytecode(cf.getConstPool(), 0, 0); + Javac jv = new Javac(code, this); + int stacksize = 0; + boolean doInit = false; + for (FieldInitLink fi = fieldInitializers; fi != null; fi = fi.next) { + CtField f = fi.field; + if (Modifier.isStatic(f.getModifiers())) { + doInit = true; + int s = fi.init.compileIfStatic(f.getType(), f.getName(), + code, jv); + if (stacksize < s) + stacksize = s; + } + } + + if (doInit) // need an initializer for static fileds. + modifyClassConstructor(cf, code, stacksize, 0); + } + + private void modifyClassConstructor(ClassFile cf, Bytecode code, + int stacksize, int localsize) + throws CannotCompileException + { + MethodInfo m = cf.getStaticInitializer(); + if (m == null) { + code.add(Bytecode.RETURN); + code.setMaxStack(stacksize); + code.setMaxLocals(localsize); + m = new MethodInfo(cf.getConstPool(), "", "()V"); + m.setAccessFlags(AccessFlag.STATIC); + m.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(m); + CtMember.Cache cache = hasMemberCache(); + if (cache != null) + cache.addConstructor(new CtConstructor(m, this)); + } + else { + CodeAttribute codeAttr = m.getCodeAttribute(); + if (codeAttr == null) + throw new CannotCompileException("empty "); + + try { + CodeIterator it = codeAttr.iterator(); + int pos = it.insertEx(code.get()); + it.insert(code.getExceptionTable(), pos); + int maxstack = codeAttr.getMaxStack(); + if (maxstack < stacksize) + codeAttr.setMaxStack(stacksize); + + int maxlocals = codeAttr.getMaxLocals(); + if (maxlocals < localsize) + codeAttr.setMaxLocals(localsize); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + try { + m.rebuildStackMapIf6(classPool, cf); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + private void modifyConstructors(ClassFile cf) + throws CannotCompileException, NotFoundException + { + if (fieldInitializers == null) + return; + + ConstPool cp = cf.getConstPool(); + List list = cf.getMethods(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + if (minfo.isConstructor()) { + CodeAttribute codeAttr = minfo.getCodeAttribute(); + if (codeAttr != null) + try { + Bytecode init = new Bytecode(cp, 0, + codeAttr.getMaxLocals()); + CtClass[] params + = Descriptor.getParameterTypes( + minfo.getDescriptor(), + classPool); + int stacksize = makeFieldInitializer(init, params); + insertAuxInitializer(codeAttr, init, stacksize); + minfo.rebuildStackMapIf6(classPool, cf); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + } + } + + private static void insertAuxInitializer(CodeAttribute codeAttr, + Bytecode initializer, + int stacksize) + throws BadBytecode + { + CodeIterator it = codeAttr.iterator(); + int index = it.skipSuperConstructor(); + if (index < 0) { + index = it.skipThisConstructor(); + if (index >= 0) + return; // this() is called. + + // Neither this() or super() is called. + } + + int pos = it.insertEx(initializer.get()); + it.insert(initializer.getExceptionTable(), pos); + int maxstack = codeAttr.getMaxStack(); + if (maxstack < stacksize) + codeAttr.setMaxStack(stacksize); + } + + private int makeFieldInitializer(Bytecode code, CtClass[] parameters) + throws CannotCompileException, NotFoundException + { + int stacksize = 0; + Javac jv = new Javac(code, this); + try { + jv.recordParams(parameters, false); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + + for (FieldInitLink fi = fieldInitializers; fi != null; fi = fi.next) { + CtField f = fi.field; + if (!Modifier.isStatic(f.getModifiers())) { + int s = fi.init.compile(f.getType(), f.getName(), code, + parameters, jv); + if (stacksize < s) + stacksize = s; + } + } + + return stacksize; + } + + // Methods used by CtNewWrappedMethod + + Hashtable getHiddenMethods() { + if (hiddenMethods == null) + hiddenMethods = new Hashtable(); + + return hiddenMethods; + } + + int getUniqueNumber() { return uniqueNumberSeed++; } + + public String makeUniqueName(String prefix) { + HashMap table = new HashMap(); + makeMemberList(table); + Set keys = table.keySet(); + String[] methods = new String[keys.size()]; + keys.toArray(methods); + + if (notFindInArray(prefix, methods)) + return prefix; + + int i = 100; + String name; + do { + if (i > 999) + throw new RuntimeException("too many unique name"); + + name = prefix + i++; + } while (!notFindInArray(name, methods)); + return name; + } + + private static boolean notFindInArray(String prefix, String[] values) { + int len = values.length; + for (int i = 0; i < len; i++) + if (values[i].startsWith(prefix)) + return false; + + return true; + } + + private void makeMemberList(HashMap table) { + int mod = getModifiers(); + if (Modifier.isAbstract(mod) || Modifier.isInterface(mod)) + try { + CtClass[] ifs = getInterfaces(); + int size = ifs.length; + for (int i = 0; i < size; i++) { + CtClass ic =ifs[i]; + if (ic != null && ic instanceof CtClassType) + ((CtClassType)ic).makeMemberList(table); + } + } + catch (NotFoundException e) {} + + try { + CtClass s = getSuperclass(); + if (s != null && s instanceof CtClassType) + ((CtClassType)s).makeMemberList(table); + } + catch (NotFoundException e) {} + + List list = getClassFile2().getMethods(); + int n = list.size(); + for (int i = 0; i < n; i++) { + MethodInfo minfo = (MethodInfo)list.get(i); + table.put(minfo.getName(), this); + } + + list = getClassFile2().getFields(); + n = list.size(); + for (int i = 0; i < n; i++) { + FieldInfo finfo = (FieldInfo)list.get(i); + table.put(finfo.getName(), this); + } + } +} + +class FieldInitLink { + FieldInitLink next; + CtField field; + CtField.Initializer init; + + FieldInitLink(CtField f, CtField.Initializer i) { + next = null; + field = f; + init = i; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java b/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java new file mode 100644 index 0000000..58dd659 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java @@ -0,0 +1,403 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * An instance of CtConstructor represents a constructor. + * It may represent a static constructor + * (class initializer). To distinguish a constructor and a class + * initializer, call isClassInitializer(). + * + *

See the super class CtBehavior as well since + * a number of useful methods are in CtBehavior. + * + * @see CtClass#getDeclaredConstructors() + * @see CtClass#getClassInitializer() + * @see CtNewConstructor + */ +public final class CtConstructor extends CtBehavior { + protected CtConstructor(MethodInfo minfo, CtClass declaring) { + super(declaring, minfo); + } + + /** + * Creates a constructor with no constructor body. + * The created constructor + * must be added to a class with CtClass.addConstructor(). + * + *

The created constructor does not include a constructor body, + * which must be specified with setBody(). + * + * @param declaring the class to which the created method is added. + * @param parameters a list of the parameter types + * + * @see CtClass#addConstructor(CtConstructor) + * @see CtConstructor#setBody(String) + * @see CtConstructor#setBody(CtConstructor,ClassMap) + */ + public CtConstructor(CtClass[] parameters, CtClass declaring) { + this((MethodInfo)null, declaring); + ConstPool cp = declaring.getClassFile2().getConstPool(); + String desc = Descriptor.ofConstructor(parameters); + methodInfo = new MethodInfo(cp, "", desc); + setModifiers(Modifier.PUBLIC); + } + + /** + * Creates a copy of a CtConstructor object. + * The created constructor must be + * added to a class with CtClass.addConstructor(). + * + *

All occurrences of class names in the created constructor + * are replaced with names specified by + * map if map is not null. + * + *

By default, all the occurrences of the names of the class + * declaring src and the superclass are replaced + * with the name of the class and the superclass that + * the created constructor is added to. + * This is done whichever map is null or not. + * To prevent this replacement, call ClassMap.fix() + * or put() to explicitly specify replacement. + * + *

Note: if the .class notation (for example, + * String.class) is included in an expression, the + * Javac compiler may produce a helper method. + * Since this constructor never + * copies this helper method, the programmers have the responsiblity of + * copying it. Otherwise, use Class.forName() in the + * expression. + * + * @param src the source method. + * @param declaring the class to which the created method is added. + * @param map the hashtable associating original class names + * with substituted names. + * It can be null. + * + * @see CtClass#addConstructor(CtConstructor) + * @see ClassMap#fix(String) + */ + public CtConstructor(CtConstructor src, CtClass declaring, ClassMap map) + throws CannotCompileException + { + this((MethodInfo)null, declaring); + copy(src, true, map); + } + + /** + * Returns true if this object represents a constructor. + */ + public boolean isConstructor() { + return methodInfo.isConstructor(); + } + + /** + * Returns true if this object represents a static initializer. + */ + public boolean isClassInitializer() { + return methodInfo.isStaticInitializer(); + } + + /** + * Returns the constructor name followed by parameter types + * such as javassist.CtConstructor(CtClass[],CtClass). + * + * @since 3.5 + */ + public String getLongName() { + return getDeclaringClass().getName() + + (isConstructor() ? Descriptor.toString(getSignature()) + : ("." + MethodInfo.nameClinit + "()")); + } + + /** + * Obtains the name of this constructor. + * It is the same as the simple name of the class declaring this + * constructor. If this object represents a class initializer, + * then this method returns "<clinit>". + */ + public String getName() { + if (methodInfo.isStaticInitializer()) + return MethodInfo.nameClinit; + else + return declaringClass.getSimpleName(); + } + + /** + * Returns true if the constructor (or static initializer) + * is the default one. This method returns true if the constructor + * takes some arguments but it does not perform anything except + * calling super() (the no-argument constructor of + * the super class). + */ + public boolean isEmpty() { + CodeAttribute ca = getMethodInfo2().getCodeAttribute(); + if (ca == null) + return false; // native or abstract?? + // they are not allowed, though. + + ConstPool cp = ca.getConstPool(); + CodeIterator it = ca.iterator(); + try { + int pos, desc; + int op0 = it.byteAt(it.next()); + return op0 == Opcode.RETURN // empty static initializer + || (op0 == Opcode.ALOAD_0 + && it.byteAt(pos = it.next()) == Opcode.INVOKESPECIAL + && (desc = cp.isConstructor(getSuperclassName(), + it.u16bitAt(pos + 1))) != 0 + && "()V".equals(cp.getUtf8Info(desc)) + && it.byteAt(it.next()) == Opcode.RETURN + && !it.hasNext()); + } + catch (BadBytecode e) {} + return false; + } + + private String getSuperclassName() { + ClassFile cf = declaringClass.getClassFile2(); + return cf.getSuperclass(); + } + + /** + * Returns true if this constructor calls a constructor + * of the super class. This method returns false if it + * calls another constructor of this class by this(). + */ + public boolean callsSuper() throws CannotCompileException { + CodeAttribute codeAttr = methodInfo.getCodeAttribute(); + if (codeAttr != null) { + CodeIterator it = codeAttr.iterator(); + try { + int index = it.skipSuperConstructor(); + return index >= 0; + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + return false; + } + + /** + * Sets a constructor body. + * + * @param src the source code representing the constructor body. + * It must be a single statement or block. + * If it is null, the substituted + * constructor body does nothing except calling + * super(). + */ + public void setBody(String src) throws CannotCompileException { + if (src == null) + if (isClassInitializer()) + src = ";"; + else + src = "super();"; + + super.setBody(src); + } + + /** + * Copies a constructor body from another constructor. + * + *

All occurrences of the class names in the copied body + * are replaced with the names specified by + * map if map is not null. + * + * @param src the method that the body is copied from. + * @param map the hashtable associating original class names + * with substituted names. + * It can be null. + */ + public void setBody(CtConstructor src, ClassMap map) + throws CannotCompileException + { + setBody0(src.declaringClass, src.methodInfo, + declaringClass, methodInfo, map); + } + + /** + * Inserts bytecode just after another constructor in the super class + * or this class is called. + * It does not work if this object represents a class initializer. + * + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + */ + public void insertBeforeBody(String src) throws CannotCompileException { + CtClass cc = declaringClass; + cc.checkModify(); + if (isClassInitializer()) + throw new CannotCompileException("class initializer"); + + CodeAttribute ca = methodInfo.getCodeAttribute(); + CodeIterator iterator = ca.iterator(); + Bytecode b = new Bytecode(methodInfo.getConstPool(), + ca.getMaxStack(), ca.getMaxLocals()); + b.setStackDepth(ca.getMaxStack()); + Javac jv = new Javac(b, cc); + try { + jv.recordParams(getParameterTypes(), false); + jv.compileStmnt(src); + ca.setMaxStack(b.getMaxStack()); + ca.setMaxLocals(b.getMaxLocals()); + iterator.skipConstructor(); + int pos = iterator.insertEx(b.get()); + iterator.insert(b.getExceptionTable(), pos); + methodInfo.rebuildStackMapIf6(cc.getClassPool(), cc.getClassFile2()); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + /* This method is called by addCatch() in CtBehavior. + * super() and this() must not be in a try statement. + */ + int getStartPosOfBody(CodeAttribute ca) throws CannotCompileException { + CodeIterator ci = ca.iterator(); + try { + ci.skipConstructor(); + return ci.next(); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + /** + * Makes a copy of this constructor and converts it into a method. + * The signature of the mehtod is the same as the that of this constructor. + * The return type is void. The resulting method must be + * appended to the class specified by declaring. + * If this constructor is a static initializer, the resulting method takes + * no parameter. + * + *

An occurrence of another constructor call this() + * or a super constructor call super() is + * eliminated from the resulting method. + * + *

The immediate super class of the class declaring this constructor + * must be also a super class of the class declaring the resulting method. + * If the constructor accesses a field, the class declaring the resulting method + * must also declare a field with the same name and type. + * + * @param name the name of the resulting method. + * @param declaring the class declaring the resulting method. + */ + public CtMethod toMethod(String name, CtClass declaring) + throws CannotCompileException + { + return toMethod(name, declaring, null); + } + + /** + * Makes a copy of this constructor and converts it into a method. + * The signature of the method is the same as the that of this constructor. + * The return type is void. The resulting method must be + * appended to the class specified by declaring. + * If this constructor is a static initializer, the resulting method takes + * no parameter. + * + *

An occurrence of another constructor call this() + * or a super constructor call super() is + * eliminated from the resulting method. + * + *

The immediate super class of the class declaring this constructor + * must be also a super class of the class declaring the resulting method + * (this is obviously true if the second parameter declaring is + * the same as the class declaring this constructor). + * If the constructor accesses a field, the class declaring the resulting method + * must also declare a field with the same name and type. + * + * @param name the name of the resulting method. + * @param declaring the class declaring the resulting method. + * It is normally the same as the class declaring this + * constructor. + * @param map the hash table associating original class names + * with substituted names. The original class names will be + * replaced while making a copy. + * map can be null. + */ + public CtMethod toMethod(String name, CtClass declaring, ClassMap map) + throws CannotCompileException + { + CtMethod method = new CtMethod(null, declaring); + method.copy(this, false, map); + if (isConstructor()) { + MethodInfo minfo = method.getMethodInfo2(); + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca != null) { + removeConsCall(ca); + try { + methodInfo.rebuildStackMapIf6(declaring.getClassPool(), + declaring.getClassFile2()); + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + } + + method.setName(name); + return method; + } + + private static void removeConsCall(CodeAttribute ca) + throws CannotCompileException + { + CodeIterator iterator = ca.iterator(); + try { + int pos = iterator.skipConstructor(); + if (pos >= 0) { + int mref = iterator.u16bitAt(pos + 1); + String desc = ca.getConstPool().getMethodrefType(mref); + int num = Descriptor.numOfParameters(desc) + 1; + if (num > 3) + pos = iterator.insertGapAt(pos, num - 3, false).position; + + iterator.writeByte(Opcode.POP, pos++); // this + iterator.writeByte(Opcode.NOP, pos); + iterator.writeByte(Opcode.NOP, pos + 1); + Descriptor.Iterator it = new Descriptor.Iterator(desc); + while (true) { + it.next(); + if (it.isParameter()) + iterator.writeByte(it.is2byte() ? Opcode.POP2 : Opcode.POP, + pos++); + else + break; + } + } + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtField.java b/src/main/java/com/wenshuo/agent/javassist/CtField.java new file mode 100644 index 0000000..7489d83 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtField.java @@ -0,0 +1,1406 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.compiler.SymbolTable; +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.compiler.ast.ASTree; +import com.wenshuo.agent.javassist.compiler.ast.IntConst; +import com.wenshuo.agent.javassist.compiler.ast.DoubleConst; +import com.wenshuo.agent.javassist.compiler.ast.StringL; + +/** + * An instance of CtField represents a field. + * + * @see CtClass#getDeclaredFields() + */ +public class CtField extends CtMember { + static final String javaLangString = "java.lang.String"; + + protected FieldInfo fieldInfo; + + /** + * Creates a CtField object. + * The created field must be added to a class + * with CtClass.addField(). + * An initial value of the field is specified + * by a CtField.Initializer object. + * + *

If getter and setter methods are needed, + * call CtNewMethod.getter() and + * CtNewMethod.setter(). + * + * @param type field type + * @param name field name + * @param declaring the class to which the field will be added. + * + * @see CtClass#addField(CtField) + * @see CtNewMethod#getter(String,CtField) + * @see CtNewMethod#setter(String,CtField) + * @see CtField.Initializer + */ + public CtField(CtClass type, String name, CtClass declaring) + throws CannotCompileException + { + this(Descriptor.of(type), name, declaring); + } + + /** + * Creates a copy of the given field. + * The created field must be added to a class + * with CtClass.addField(). + * An initial value of the field is specified + * by a CtField.Initializer object. + * + *

If getter and setter methods are needed, + * call CtNewMethod.getter() and + * CtNewMethod.setter(). + * + * @param src the original field + * @param declaring the class to which the field will be added. + * @see CtNewMethod#getter(String,CtField) + * @see CtNewMethod#setter(String,CtField) + * @see CtField.Initializer + */ + public CtField(CtField src, CtClass declaring) + throws CannotCompileException + { + this(src.fieldInfo.getDescriptor(), src.fieldInfo.getName(), + declaring); + java.util.ListIterator iterator + = src.fieldInfo.getAttributes().listIterator(); + FieldInfo fi = fieldInfo; + fi.setAccessFlags(src.fieldInfo.getAccessFlags()); + ConstPool cp = fi.getConstPool(); + while (iterator.hasNext()) { + AttributeInfo ainfo = (AttributeInfo)iterator.next(); + fi.addAttribute(ainfo.copy(cp, null)); + } + } + + private CtField(String typeDesc, String name, CtClass clazz) + throws CannotCompileException + { + super(clazz); + ClassFile cf = clazz.getClassFile2(); + if (cf == null) + throw new CannotCompileException("bad declaring class: " + + clazz.getName()); + + fieldInfo = new FieldInfo(cf.getConstPool(), name, typeDesc); + } + + CtField(FieldInfo fi, CtClass clazz) { + super(clazz); + fieldInfo = fi; + } + + /** + * Returns a String representation of the object. + */ + public String toString() { + return getDeclaringClass().getName() + "." + getName() + + ":" + fieldInfo.getDescriptor(); + } + + protected void extendToString(StringBuffer buffer) { + buffer.append(' '); + buffer.append(getName()); + buffer.append(' '); + buffer.append(fieldInfo.getDescriptor()); + } + + /* Javac.CtFieldWithInit overrides. + */ + protected ASTree getInitAST() { return null; } + + /* Called by CtClassType.addField(). + */ + Initializer getInit() { + ASTree tree = getInitAST(); + if (tree == null) + return null; + else + return Initializer.byExpr(tree); + } + + /** + * Compiles the given source code and creates a field. + * Examples of the source code are: + * + * 

+     * "public String name;"
+     * "public int k = 3;"
+ * + *

Note that the source code ends with ';' + * (semicolon). + * + * @param src the source text. + * @param declaring the class to which the created field is added. + */ + public static CtField make(String src, CtClass declaring) + throws CannotCompileException + { + Javac compiler = new Javac(declaring); + try { + CtMember obj = compiler.compile(src); + if (obj instanceof CtField) + return (CtField)obj; // an instance of Javac.CtFieldWithInit + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + + throw new CannotCompileException("not a field"); + } + + /** + * Returns the FieldInfo representing the field in the class file. + */ + public FieldInfo getFieldInfo() { + declaringClass.checkModify(); + return fieldInfo; + } + + /** + * Returns the FieldInfo representing the field in the class + * file (read only). + * Normal applications do not need calling this method. Use + * getFieldInfo(). + * + *

The FieldInfo object obtained by this method + * is read only. Changes to this object might not be reflected + * on a class file generated by toBytecode(), + * toClass(), etc in CtClass. + * + *

This method is available even if the CtClass + * containing this field is frozen. However, if the class is + * frozen, the FieldInfo might be also pruned. + * + * @see #getFieldInfo() + * @see CtClass#isFrozen() + * @see CtClass#prune() + */ + public FieldInfo getFieldInfo2() { return fieldInfo; } + + /** + * Returns the class declaring the field. + */ + public CtClass getDeclaringClass() { + // this is redundant but for javadoc. + return super.getDeclaringClass(); + } + + /** + * Returns the name of the field. + */ + public String getName() { + return fieldInfo.getName(); + } + + /** + * Changes the name of the field. + */ + public void setName(String newName) { + declaringClass.checkModify(); + fieldInfo.setName(newName); + } + + /** + * Returns the encoded modifiers of the field. + * + * @see Modifier + */ + public int getModifiers() { + return AccessFlag.toModifier(fieldInfo.getAccessFlags()); + } + + /** + * Sets the encoded modifiers of the field. + * + * @see Modifier + */ + public void setModifiers(int mod) { + declaringClass.checkModify(); + fieldInfo.setAccessFlags(AccessFlag.of(mod)); + } + + /** + * Returns true if the class has the specified annotation class. + * + * @param clz the annotation class. + * @return true if the annotation is found, otherwise false. + * @since 3.11 + */ + public boolean hasAnnotation(Class clz) { + FieldInfo fi = getFieldInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.hasAnnotationType(clz, getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the annotation if the class has the specified annotation class. + * For example, if an annotation @Author is associated + * with this field, an Author object is returned. + * The member values can be obtained by calling methods on + * the Author object. + * + * @param clz the annotation class. + * @return the annotation if found, otherwise null. + * @since 3.11 + */ + public Object getAnnotation(Class clz) throws ClassNotFoundException { + FieldInfo fi = getFieldInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.getAnnotationType(clz, getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the annotations associated with this field. + * + * @return an array of annotation-type objects. + * @see #getAvailableAnnotations() + * @since 3.1 + */ + public Object[] getAnnotations() throws ClassNotFoundException { + return getAnnotations(false); + } + + /** + * Returns the annotations associated with this field. + * If any annotations are not on the classpath, they are not included + * in the returned array. + * + * @return an array of annotation-type objects. + * @see #getAnnotations() + * @since 3.3 + */ + public Object[] getAvailableAnnotations(){ + try { + return getAnnotations(true); + } + catch (ClassNotFoundException e) { + throw new RuntimeException("Unexpected exception", e); + } + } + + private Object[] getAnnotations(boolean ignoreNotFound) throws ClassNotFoundException { + FieldInfo fi = getFieldInfo2(); + AnnotationsAttribute ainfo = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.invisibleTag); + AnnotationsAttribute ainfo2 = (AnnotationsAttribute) + fi.getAttribute(AnnotationsAttribute.visibleTag); + return CtClassType.toAnnotationType(ignoreNotFound, getDeclaringClass().getClassPool(), + ainfo, ainfo2); + } + + /** + * Returns the character string representing the type of the field. + * The field signature is represented by a character string + * called a field descriptor, which is defined in the JVM specification. + * If two fields have the same type, + * getSignature() returns the same string. + * + *

Note that the returned string is not the type signature + * contained in the SignatureAttirbute. It is + * a descriptor. + * + * @see javassist.bytecode.Descriptor + * @see #getGenericSignature() + */ + public String getSignature() { + return fieldInfo.getDescriptor(); + } + + /** + * Returns the generic signature of the field. + * It represents a type including type variables. + * + * @see SignatureAttribute#toFieldSignature(String) + * @since 3.17 + */ + public String getGenericSignature() { + SignatureAttribute sa + = (SignatureAttribute)fieldInfo.getAttribute(SignatureAttribute.tag); + return sa == null ? null : sa.getSignature(); + } + + /** + * Set the generic signature of the field. + * It represents a type including type variables. + * See {@link javassist.CtClass#setGenericSignature(String)} + * for a code sample. + * + * @param sig a new generic signature. + * @see javassist.bytecode.SignatureAttribute.ObjectType#encode() + * @since 3.17 + */ + public void setGenericSignature(String sig) { + declaringClass.checkModify(); + fieldInfo.addAttribute(new SignatureAttribute(fieldInfo.getConstPool(), sig)); + } + + /** + * Returns the type of the field. + */ + public CtClass getType() throws NotFoundException { + return Descriptor.toCtClass(fieldInfo.getDescriptor(), + declaringClass.getClassPool()); + } + + /** + * Sets the type of the field. + */ + public void setType(CtClass clazz) { + declaringClass.checkModify(); + fieldInfo.setDescriptor(Descriptor.of(clazz)); + } + + /** + * Returns the value of this field if it is a constant field. + * This method works only if the field type is a primitive type + * or String type. Otherwise, it returns null. + * A constant field is static and final. + * + * @return a Integer, Long, Float, + * Double, Boolean, + * or String object + * representing the constant value. + * null if it is not a constant field + * or if the field type is not a primitive type + * or String. + */ + public Object getConstantValue() { + // When this method is modified, + // see also getConstantFieldValue() in TypeChecker. + + int index = fieldInfo.getConstantValue(); + if (index == 0) + return null; + + ConstPool cp = fieldInfo.getConstPool(); + switch (cp.getTag(index)) { + case ConstPool.CONST_Long : + return new Long(cp.getLongInfo(index)); + case ConstPool.CONST_Float : + return new Float(cp.getFloatInfo(index)); + case ConstPool.CONST_Double : + return new Double(cp.getDoubleInfo(index)); + case ConstPool.CONST_Integer : + int value = cp.getIntegerInfo(index); + // "Z" means boolean type. + if ("Z".equals(fieldInfo.getDescriptor())) + return new Boolean(value != 0); + else + return new Integer(value); + case ConstPool.CONST_String : + return cp.getStringInfo(index); + default : + throw new RuntimeException("bad tag: " + cp.getTag(index) + + " at " + index); + } + } + + /** + * Obtains an attribute with the given name. + * If that attribute is not found in the class file, this + * method returns null. + * + *

Note that an attribute is a data block specified by + * the class file format. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + */ + public byte[] getAttribute(String name) { + AttributeInfo ai = fieldInfo.getAttribute(name); + if (ai == null) + return null; + else + return ai.get(); + } + + /** + * Adds an attribute. The attribute is saved in the class file. + * + *

Note that an attribute is a data block specified by + * the class file format. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + * @param data attribute value + */ + public void setAttribute(String name, byte[] data) { + declaringClass.checkModify(); + fieldInfo.addAttribute(new AttributeInfo(fieldInfo.getConstPool(), + name, data)); + } + + // inner classes + + /** + * Instances of this class specify how to initialize a field. + * Initializer is passed to + * CtClass.addField() with a CtField. + * + *

This class cannot be instantiated with the new operator. + * Factory methods such as byParameter() and + * byNew + * must be used for the instantiation. They create a new instance with + * the given parameters and return it. + * + * @see CtClass#addField(CtField,CtField.Initializer) + */ + public static abstract class Initializer { + /** + * Makes an initializer that assigns a constant integer value. + * The field must be integer, short, char, or byte type. + */ + public static Initializer constant(int i) { + return new IntInitializer(i); + } + + /** + * Makes an initializer that assigns a constant boolean value. + * The field must be boolean type. + */ + public static Initializer constant(boolean b) { + return new IntInitializer(b ? 1 : 0); + } + + /** + * Makes an initializer that assigns a constant long value. + * The field must be long type. + */ + public static Initializer constant(long l) { + return new LongInitializer(l); + } + + /** + * Makes an initializer that assigns a constant float value. + * The field must be float type. + */ + public static Initializer constant(float l) { + return new FloatInitializer(l); + } + + /** + * Makes an initializer that assigns a constant double value. + * The field must be double type. + */ + public static Initializer constant(double d) { + return new DoubleInitializer(d); + } + + /** + * Makes an initializer that assigns a constant string value. + * The field must be java.lang.String type. + */ + public static Initializer constant(String s) { + return new StringInitializer(s); + } + + /** + * Makes an initializer using a constructor parameter. + * + *

The initial value is the + * N-th parameter given to the constructor of the object including + * the field. If the constructor takes less than N parameters, + * the field is not initialized. + * If the field is static, it is never initialized. + * + * @param nth the n-th (>= 0) parameter is used as + * the initial value. + * If nth is 0, then the first parameter is + * used. + */ + public static Initializer byParameter(int nth) { + ParamInitializer i = new ParamInitializer(); + i.nthParam = nth; + return i; + } + + /** + * Makes an initializer creating a new object. + * + *

This initializer creates a new object and uses it as the initial + * value of the field. The constructor of the created object receives + * the parameter: + * + *

Object obj - the object including the field. + * + *

If the initialized field is static, then the constructor does + * not receive any parameters. + * + * @param objectType the class instantiated for the initial value. + */ + public static Initializer byNew(CtClass objectType) { + NewInitializer i = new NewInitializer(); + i.objectType = objectType; + i.stringParams = null; + i.withConstructorParams = false; + return i; + } + + /** + * Makes an initializer creating a new object. + * + *

This initializer creates a new object and uses it as the initial + * value of the field. The constructor of the created object receives + * the parameters: + * + *

Object obj - the object including the field.
+ * String[] strs - the character strings specified + * by stringParams
+ * + *

If the initialized field is static, then the constructor + * receives only strs. + * + * @param objectType the class instantiated for the initial value. + * @param stringParams the array of strings passed to the + * constructor. + */ + public static Initializer byNew(CtClass objectType, + String[] stringParams) { + NewInitializer i = new NewInitializer(); + i.objectType = objectType; + i.stringParams = stringParams; + i.withConstructorParams = false; + return i; + } + + /** + * Makes an initializer creating a new object. + * + *

This initializer creates a new object and uses it as the initial + * value of the field. The constructor of the created object receives + * the parameters: + * + *

Object obj - the object including the field.
+ * Object[] args - the parameters passed to the + * constructor of the object including the + * filed. + * + *

If the initialized field is static, then the constructor does + * not receive any parameters. + * + * @param objectType the class instantiated for the initial value. + * + * @see javassist.CtField.Initializer#byNewArray(CtClass,int) + * @see javassist.CtField.Initializer#byNewArray(CtClass,int[]) + */ + public static Initializer byNewWithParams(CtClass objectType) { + NewInitializer i = new NewInitializer(); + i.objectType = objectType; + i.stringParams = null; + i.withConstructorParams = true; + return i; + } + + /** + * Makes an initializer creating a new object. + * + *

This initializer creates a new object and uses it as the initial + * value of the field. The constructor of the created object receives + * the parameters: + * + *

Object obj - the object including the field.
+ * String[] strs - the character strings specified + * by stringParams
+ * Object[] args - the parameters passed to the + * constructor of the object including the + * filed. + * + *

If the initialized field is static, then the constructor receives + * only strs. + * + * @param objectType the class instantiated for the initial value. + * @param stringParams the array of strings passed to the + * constructor. + */ + public static Initializer byNewWithParams(CtClass objectType, + String[] stringParams) { + NewInitializer i = new NewInitializer(); + i.objectType = objectType; + i.stringParams = stringParams; + i.withConstructorParams = true; + return i; + } + + /** + * Makes an initializer calling a static method. + * + *

This initializer calls a static method and uses the returned + * value as the initial value of the field. + * The called method receives the parameters: + * + *

Object obj - the object including the field. + * + *

If the initialized field is static, then the method does + * not receive any parameters. + * + *

The type of the returned value must be the same as the field + * type. + * + * @param methodClass the class that the static method is + * declared in. + * @param methodName the name of the satic method. + */ + public static Initializer byCall(CtClass methodClass, + String methodName) { + MethodInitializer i = new MethodInitializer(); + i.objectType = methodClass; + i.methodName = methodName; + i.stringParams = null; + i.withConstructorParams = false; + return i; + } + + /** + * Makes an initializer calling a static method. + * + *

This initializer calls a static method and uses the returned + * value as the initial value of the field. The called method + * receives the parameters: + * + *

Object obj - the object including the field.
+ * String[] strs - the character strings specified + * by stringParams
+ * + *

If the initialized field is static, then the method + * receive only strs. + * + *

The type of the returned value must be the same as the field + * type. + * + * @param methodClass the class that the static method is + * declared in. + * @param methodName the name of the satic method. + * @param stringParams the array of strings passed to the + * static method. + */ + public static Initializer byCall(CtClass methodClass, + String methodName, + String[] stringParams) { + MethodInitializer i = new MethodInitializer(); + i.objectType = methodClass; + i.methodName = methodName; + i.stringParams = stringParams; + i.withConstructorParams = false; + return i; + } + + /** + * Makes an initializer calling a static method. + * + *

This initializer calls a static method and uses the returned + * value as the initial value of the field. The called method + * receives the parameters: + * + *

Object obj - the object including the field.
+ * Object[] args - the parameters passed to the + * constructor of the object including the + * filed. + * + *

If the initialized field is static, then the method does + * not receive any parameters. + * + *

The type of the returned value must be the same as the field + * type. + * + * @param methodClass the class that the static method is + * declared in. + * @param methodName the name of the satic method. + */ + public static Initializer byCallWithParams(CtClass methodClass, + String methodName) { + MethodInitializer i = new MethodInitializer(); + i.objectType = methodClass; + i.methodName = methodName; + i.stringParams = null; + i.withConstructorParams = true; + return i; + } + + /** + * Makes an initializer calling a static method. + * + *

This initializer calls a static method and uses the returned + * value as the initial value of the field. The called method + * receives the parameters: + * + *

Object obj - the object including the field.
+ * String[] strs - the character strings specified + * by stringParams
+ * Object[] args - the parameters passed to the + * constructor of the object including the + * filed. + * + *

If the initialized field is static, then the method + * receive only strs. + * + *

The type of the returned value must be the same as the field + * type. + * + * @param methodClass the class that the static method is + * declared in. + * @param methodName the name of the satic method. + * @param stringParams the array of strings passed to the + * static method. + */ + public static Initializer byCallWithParams(CtClass methodClass, + String methodName, String[] stringParams) { + MethodInitializer i = new MethodInitializer(); + i.objectType = methodClass; + i.methodName = methodName; + i.stringParams = stringParams; + i.withConstructorParams = true; + return i; + } + + /** + * Makes an initializer creating a new array. + * + * @param type the type of the array. + * @param size the size of the array. + * @throws NotFoundException if the type of the array components + * is not found. + */ + public static Initializer byNewArray(CtClass type, int size) + throws NotFoundException + { + return new ArrayInitializer(type.getComponentType(), size); + } + + /** + * Makes an initializer creating a new multi-dimensional array. + * + * @param type the type of the array. + * @param sizes an int array of the size in every + * dimension. + * The first element is the size in the first + * dimension. The second is in the second, etc. + */ + public static Initializer byNewArray(CtClass type, int[] sizes) { + return new MultiArrayInitializer(type, sizes); + } + + /** + * Makes an initializer. + * + * @param source initializer expression. + */ + public static Initializer byExpr(String source) { + return new CodeInitializer(source); + } + + static Initializer byExpr(ASTree source) { + return new PtreeInitializer(source); + } + + // Check whether this initializer is valid for the field type. + // If it is invaild, this method throws an exception. + void check(String desc) throws CannotCompileException {} + + // produce codes for initialization + abstract int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException; + + // produce codes for initialization + abstract int compileIfStatic(CtClass type, String name, + Bytecode code, Javac drv) throws CannotCompileException; + + // returns the index of CONSTANT_Integer_info etc + // if the value is constant. Otherwise, 0. + int getConstantValue(ConstPool cp, CtClass type) { return 0; } + } + + static abstract class CodeInitializer0 extends Initializer { + abstract void compileExpr(Javac drv) throws CompileError; + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + try { + code.addAload(0); + compileExpr(drv); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return code.getMaxStack(); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + try { + compileExpr(drv); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return code.getMaxStack(); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + } + + int getConstantValue2(ConstPool cp, CtClass type, ASTree tree) { + if (type.isPrimitive()) { + if (tree instanceof IntConst) { + long value = ((IntConst)tree).get(); + if (type == CtClass.doubleType) + return cp.addDoubleInfo((double)value); + else if (type == CtClass.floatType) + return cp.addFloatInfo((float)value); + else if (type == CtClass.longType) + return cp.addLongInfo(value); + else if (type != CtClass.voidType) + return cp.addIntegerInfo((int)value); + } + else if (tree instanceof DoubleConst) { + double value = ((DoubleConst)tree).get(); + if (type == CtClass.floatType) + return cp.addFloatInfo((float)value); + else if (type == CtClass.doubleType) + return cp.addDoubleInfo(value); + } + } + else if (tree instanceof StringL + && type.getName().equals(javaLangString)) + return cp.addStringInfo(((StringL)tree).get()); + + return 0; + } + } + + static class CodeInitializer extends CodeInitializer0 { + private String expression; + + CodeInitializer(String expr) { expression = expr; } + + void compileExpr(Javac drv) throws CompileError { + drv.compileExpr(expression); + } + + int getConstantValue(ConstPool cp, CtClass type) { + try { + ASTree t = Javac.parseExpr(expression, new SymbolTable()); + return getConstantValue2(cp, type, t); + } + catch (CompileError e) { + return 0; + } + } + } + + static class PtreeInitializer extends CodeInitializer0 { + private ASTree expression; + + PtreeInitializer(ASTree expr) { expression = expr; } + + void compileExpr(Javac drv) throws CompileError { + drv.compileExpr(expression); + } + + int getConstantValue(ConstPool cp, CtClass type) { + return getConstantValue2(cp, type, expression); + } + } + + /** + * A field initialized with a parameter passed to the constructor + * of the class containing that field. + */ + static class ParamInitializer extends Initializer { + int nthParam; + + ParamInitializer() {} + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + if (parameters != null && nthParam < parameters.length) { + code.addAload(0); + int nth = nthParamToLocal(nthParam, parameters, false); + int s = code.addLoad(nth, type) + 1; + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return s; // stack size + } + else + return 0; // do not initialize + } + + /** + * Computes the index of the local variable that the n-th parameter + * is assigned to. + * + * @param nth n-th parameter + * @param params list of parameter types + * @param isStatic true if the method is static. + */ + static int nthParamToLocal(int nth, CtClass[] params, + boolean isStatic) { + CtClass longType = CtClass.longType; + CtClass doubleType = CtClass.doubleType; + int k; + if (isStatic) + k = 0; + else + k = 1; // 0 is THIS. + + for (int i = 0; i < nth; ++i) { + CtClass type = params[i]; + if (type == longType || type == doubleType) + k += 2; + else + ++k; + } + + return k; + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + return 0; + } + } + + /** + * A field initialized with an object created by the new operator. + */ + static class NewInitializer extends Initializer { + CtClass objectType; + String[] stringParams; + boolean withConstructorParams; + + NewInitializer() {} + + /** + * Produces codes in which a new object is created and assigned to + * the field as the initial value. + */ + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + int stacksize; + + code.addAload(0); + code.addNew(objectType); + code.add(Bytecode.DUP); + code.addAload(0); + + if (stringParams == null) + stacksize = 4; + else + stacksize = compileStringParameter(code) + 4; + + if (withConstructorParams) + stacksize += CtNewWrappedMethod.compileParameterList(code, + parameters, 1); + + code.addInvokespecial(objectType, "", getDescriptor()); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return stacksize; + } + + private String getDescriptor() { + final String desc3 + = "(Ljava/lang/Object;[Ljava/lang/String;[Ljava/lang/Object;)V"; + + if (stringParams == null) + if (withConstructorParams) + return "(Ljava/lang/Object;[Ljava/lang/Object;)V"; + else + return "(Ljava/lang/Object;)V"; + else + if (withConstructorParams) + return desc3; + else + return "(Ljava/lang/Object;[Ljava/lang/String;)V"; + } + + /** + * Produces codes for a static field. + */ + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + String desc; + + code.addNew(objectType); + code.add(Bytecode.DUP); + + int stacksize = 2; + if (stringParams == null) + desc = "()V"; + else { + desc = "([Ljava/lang/String;)V"; + stacksize += compileStringParameter(code); + } + + code.addInvokespecial(objectType, "", desc); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return stacksize; + } + + protected final int compileStringParameter(Bytecode code) + throws CannotCompileException + { + int nparam = stringParams.length; + code.addIconst(nparam); + code.addAnewarray(javaLangString); + for (int j = 0; j < nparam; ++j) { + code.add(Bytecode.DUP); // dup + code.addIconst(j); // iconst_ + code.addLdc(stringParams[j]); // ldc ... + code.add(Bytecode.AASTORE); // aastore + } + + return 4; + } + + } + + /** + * A field initialized with the result of a static method call. + */ + static class MethodInitializer extends NewInitializer { + String methodName; + // the method class is specified by objectType. + + MethodInitializer() {} + + /** + * Produces codes in which a new object is created and assigned to + * the field as the initial value. + */ + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + int stacksize; + + code.addAload(0); + code.addAload(0); + + if (stringParams == null) + stacksize = 2; + else + stacksize = compileStringParameter(code) + 2; + + if (withConstructorParams) + stacksize += CtNewWrappedMethod.compileParameterList(code, + parameters, 1); + + String typeDesc = Descriptor.of(type); + String mDesc = getDescriptor() + typeDesc; + code.addInvokestatic(objectType, methodName, mDesc); + code.addPutfield(Bytecode.THIS, name, typeDesc); + return stacksize; + } + + private String getDescriptor() { + final String desc3 + = "(Ljava/lang/Object;[Ljava/lang/String;[Ljava/lang/Object;)"; + + if (stringParams == null) + if (withConstructorParams) + return "(Ljava/lang/Object;[Ljava/lang/Object;)"; + else + return "(Ljava/lang/Object;)"; + else + if (withConstructorParams) + return desc3; + else + return "(Ljava/lang/Object;[Ljava/lang/String;)"; + } + + /** + * Produces codes for a static field. + */ + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + String desc; + + int stacksize = 1; + if (stringParams == null) + desc = "()"; + else { + desc = "([Ljava/lang/String;)"; + stacksize += compileStringParameter(code); + } + + String typeDesc = Descriptor.of(type); + code.addInvokestatic(objectType, methodName, desc + typeDesc); + code.addPutstatic(Bytecode.THIS, name, typeDesc); + return stacksize; + } + } + + static class IntInitializer extends Initializer { + int value; + + IntInitializer(int v) { value = v; } + + void check(String desc) throws CannotCompileException { + char c = desc.charAt(0); + if (c != 'I' && c != 'S' && c != 'B' && c != 'C' && c != 'Z') + throw new CannotCompileException("type mismatch"); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + code.addIconst(value); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + code.addIconst(value); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 1; // stack size + } + + int getConstantValue(ConstPool cp, CtClass type) { + return cp.addIntegerInfo(value); + } + } + + static class LongInitializer extends Initializer { + long value; + + LongInitializer(long v) { value = v; } + + void check(String desc) throws CannotCompileException { + if (!desc.equals("J")) + throw new CannotCompileException("type mismatch"); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + code.addLdc2w(value); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 3; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + code.addLdc2w(value); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int getConstantValue(ConstPool cp, CtClass type) { + if (type == CtClass.longType) + return cp.addLongInfo(value); + else + return 0; + } + } + + static class FloatInitializer extends Initializer { + float value; + + FloatInitializer(float v) { value = v; } + + void check(String desc) throws CannotCompileException { + if (!desc.equals("F")) + throw new CannotCompileException("type mismatch"); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + code.addFconst(value); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 3; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + code.addFconst(value); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int getConstantValue(ConstPool cp, CtClass type) { + if (type == CtClass.floatType) + return cp.addFloatInfo(value); + else + return 0; + } + } + + static class DoubleInitializer extends Initializer { + double value; + + DoubleInitializer(double v) { value = v; } + + void check(String desc) throws CannotCompileException { + if (!desc.equals("D")) + throw new CannotCompileException("type mismatch"); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + code.addLdc2w(value); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 3; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + code.addLdc2w(value); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int getConstantValue(ConstPool cp, CtClass type) { + if (type == CtClass.doubleType) + return cp.addDoubleInfo(value); + else + return 0; + } + } + + static class StringInitializer extends Initializer { + String value; + + StringInitializer(String v) { value = v; } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + code.addLdc(value); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + code.addLdc(value); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 1; // stack size + } + + int getConstantValue(ConstPool cp, CtClass type) { + if (type.getName().equals(javaLangString)) + return cp.addStringInfo(value); + else + return 0; + } + } + + static class ArrayInitializer extends Initializer { + CtClass type; + int size; + + ArrayInitializer(CtClass t, int s) { type = t; size = s; } + + private void addNewarray(Bytecode code) { + if (type.isPrimitive()) + code.addNewarray(((CtPrimitiveType)type).getArrayType(), + size); + else + code.addAnewarray(type, size); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + addNewarray(code); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return 2; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + addNewarray(code); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return 1; // stack size + } + } + + static class MultiArrayInitializer extends Initializer { + CtClass type; + int[] dim; + + MultiArrayInitializer(CtClass t, int[] d) { type = t; dim = d; } + + void check(String desc) throws CannotCompileException { + if (desc.charAt(0) != '[') + throw new CannotCompileException("type mismatch"); + } + + int compile(CtClass type, String name, Bytecode code, + CtClass[] parameters, Javac drv) + throws CannotCompileException + { + code.addAload(0); + int s = code.addMultiNewarray(type, dim); + code.addPutfield(Bytecode.THIS, name, Descriptor.of(type)); + return s + 1; // stack size + } + + int compileIfStatic(CtClass type, String name, Bytecode code, + Javac drv) throws CannotCompileException + { + int s = code.addMultiNewarray(type, dim); + code.addPutstatic(Bytecode.THIS, name, Descriptor.of(type)); + return s; // stack size + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtMember.java b/src/main/java/com/wenshuo/agent/javassist/CtMember.java new file mode 100644 index 0000000..2e83f97 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtMember.java @@ -0,0 +1,319 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +/** + * An instance of CtMember represents a field, a constructor, + * or a method. + */ +public abstract class CtMember { + CtMember next; // for internal use + protected CtClass declaringClass; + + /* Make a circular link of CtMembers declared in the + * same class so that they are garbage-collected together + * at the same time. + */ + static class Cache extends CtMember { + protected void extendToString(StringBuffer buffer) {} + public boolean hasAnnotation(Class clz) { return false; } + public Object getAnnotation(Class clz) + throws ClassNotFoundException { return null; } + public Object[] getAnnotations() + throws ClassNotFoundException { return null; } + public byte[] getAttribute(String name) { return null; } + public Object[] getAvailableAnnotations() { return null; } + public int getModifiers() { return 0; } + public String getName() { return null; } + public String getSignature() { return null; } + public void setAttribute(String name, byte[] data) {} + public void setModifiers(int mod) {} + public String getGenericSignature() { return null; } + public void setGenericSignature(String sig) {} + + private CtMember methodTail; + private CtMember consTail; // constructor tail + private CtMember fieldTail; + + Cache(CtClassType decl) { + super(decl); + methodTail = this; + consTail = this; + fieldTail = this; + fieldTail.next = this; + } + + CtMember methodHead() { return this; } + CtMember lastMethod() { return methodTail; } + CtMember consHead() { return methodTail; } // may include a static initializer + CtMember lastCons() { return consTail; } + CtMember fieldHead() { return consTail; } + CtMember lastField() { return fieldTail; } + + void addMethod(CtMember method) { + method.next = methodTail.next; + methodTail.next = method; + if (methodTail == consTail) { + consTail = method; + if (methodTail == fieldTail) + fieldTail = method; + } + + methodTail = method; + } + + /* Both constructors and a class initializer. + */ + void addConstructor(CtMember cons) { + cons.next = consTail.next; + consTail.next = cons; + if (consTail == fieldTail) + fieldTail = cons; + + consTail = cons; + } + + void addField(CtMember field) { + field.next = this; // or fieldTail.next + fieldTail.next = field; + fieldTail = field; + } + + static int count(CtMember head, CtMember tail) { + int n = 0; + while (head != tail) { + n++; + head = head.next; + } + + return n; + } + + void remove(CtMember mem) { + CtMember m = this; + CtMember node; + while ((node = m.next) != this) { + if (node == mem) { + m.next = node.next; + if (node == methodTail) + methodTail = m; + + if (node == consTail) + consTail = m; + + if (node == fieldTail) + fieldTail = m; + + break; + } + else + m = m.next; + } + } + } + + protected CtMember(CtClass clazz) { + declaringClass = clazz; + next = null; + } + + final CtMember next() { return next; } + + /** + * This method is invoked when setName() or replaceClassName() + * in CtClass is called. + * + * @see CtMethod#nameReplaced() + */ + void nameReplaced() {} + + public String toString() { + StringBuffer buffer = new StringBuffer(getClass().getName()); + buffer.append("@"); + buffer.append(Integer.toHexString(hashCode())); + buffer.append("["); + buffer.append(Modifier.toString(getModifiers())); + extendToString(buffer); + buffer.append("]"); + return buffer.toString(); + } + + /** + * Invoked by {@link #toString()} to add to the buffer and provide the + * complete value. Subclasses should invoke this method, adding a + * space before each token. The modifiers for the member are + * provided first; subclasses should provide additional data such + * as return type, field or method name, etc. + */ + protected abstract void extendToString(StringBuffer buffer); + + /** + * Returns the class that declares this member. + */ + public CtClass getDeclaringClass() { return declaringClass; } + + /** + * Returns true if this member is accessible from the given class. + */ + public boolean visibleFrom(CtClass clazz) { + int mod = getModifiers(); + if (Modifier.isPublic(mod)) + return true; + else if (Modifier.isPrivate(mod)) + return clazz == declaringClass; + else { // package or protected + String declName = declaringClass.getPackageName(); + String fromName = clazz.getPackageName(); + boolean visible; + if (declName == null) + visible = fromName == null; + else + visible = declName.equals(fromName); + + if (!visible && Modifier.isProtected(mod)) + return clazz.subclassOf(declaringClass); + + return visible; + } + } + + /** + * Obtains the modifiers of the member. + * + * @return modifiers encoded with + * javassist.Modifier. + * @see Modifier + */ + public abstract int getModifiers(); + + /** + * Sets the encoded modifiers of the member. + * + * @see Modifier + */ + public abstract void setModifiers(int mod); + + /** + * Returns true if the class has the specified annotation class. + * + * @param clz the annotation class. + * @return true if the annotation is found, otherwise false. + * @since 3.11 + */ + public abstract boolean hasAnnotation(Class clz); + + /** + * Returns the annotation if the class has the specified annotation class. + * For example, if an annotation @Author is associated + * with this member, an Author object is returned. + * The member values can be obtained by calling methods on + * the Author object. + * + * @param clz the annotation class. + * @return the annotation if found, otherwise null. + * @since 3.11 + */ + public abstract Object getAnnotation(Class clz) throws ClassNotFoundException; + + /** + * Returns the annotations associated with this member. + * For example, if an annotation @Author is associated + * with this member, the returned array contains an Author + * object. The member values can be obtained by calling methods on + * the Author object. + * + * @return an array of annotation-type objects. + * @see CtClass#getAnnotations() + */ + public abstract Object[] getAnnotations() throws ClassNotFoundException; + + /** + * Returns the annotations associated with this member. + * This method is equivalent to getAnnotations() + * except that, if any annotations are not on the classpath, + * they are not included in the returned array. + * + * @return an array of annotation-type objects. + * @see #getAnnotations() + * @see CtClass#getAvailableAnnotations() + * @since 3.3 + */ + public abstract Object[] getAvailableAnnotations(); + + /** + * Obtains the name of the member. + * + *

As for constructor names, see getName() + * in CtConstructor. + * + * @see CtConstructor#getName() + */ + public abstract String getName(); + + /** + * Returns the character string representing the signature of the member. + * If two members have the same signature (parameter types etc.), + * getSignature() returns the same string. + */ + public abstract String getSignature(); + + /** + * Returns the generic signature of the member. + * + * @see javassist.bytecode.SignatureAttribute#toFieldSignature(String) + * @see javassist.bytecode.SignatureAttribute#toMethodSignature(String) + * @see CtClass#getGenericSignature() + * @since 3.17 + */ + public abstract String getGenericSignature(); + + /** + * Sets the generic signature of the member. + * + * @param sig a new generic signature. + * @see javassist.bytecode.SignatureAttribute.ObjectType#encode() + * @see javassist.bytecode.SignatureAttribute.MethodSignature#encode() + * @see CtClass#setGenericSignature(String) + * @since 3.17 + */ + public abstract void setGenericSignature(String sig); + + /** + * Obtains a user-defined attribute with the given name. + * If that attribute is not found in the class file, this + * method returns null. + * + *

Note that an attribute is a data block specified by + * the class file format. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + */ + public abstract byte[] getAttribute(String name); + + /** + * Adds a user-defined attribute. The attribute is saved in the class file. + * + *

Note that an attribute is a data block specified by + * the class file format. + * See {@link javassist.bytecode.AttributeInfo}. + * + * @param name attribute name + * @param data attribute value + */ + public abstract void setAttribute(String name, byte[] data); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtMethod.java b/src/main/java/com/wenshuo/agent/javassist/CtMethod.java new file mode 100644 index 0000000..42d9f22 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtMethod.java @@ -0,0 +1,438 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; + +/** + * An instance of CtMethod represents a method. + * + *

See the super class CtBehavior since + * a number of useful methods are in CtBehavior. + * A number of useful factory methods are in CtNewMethod. + * + * @see CtClass#getDeclaredMethods() + * @see CtNewMethod + */ +public final class CtMethod extends CtBehavior { + protected String cachedStringRep; + + /** + * @see #make(MethodInfo minfo, CtClass declaring) + */ + CtMethod(MethodInfo minfo, CtClass declaring) { + super(declaring, minfo); + cachedStringRep = null; + } + + /** + * Creates a public abstract method. The created method must be + * added to a class with CtClass.addMethod(). + * + * @param declaring the class to which the created method is added. + * @param returnType the type of the returned value + * @param mname the method name + * @param parameters a list of the parameter types + * + * @see CtClass#addMethod(CtMethod) + */ + public CtMethod(CtClass returnType, String mname, + CtClass[] parameters, CtClass declaring) { + this(null, declaring); + ConstPool cp = declaring.getClassFile2().getConstPool(); + String desc = Descriptor.ofMethod(returnType, parameters); + methodInfo = new MethodInfo(cp, mname, desc); + setModifiers(Modifier.PUBLIC | Modifier.ABSTRACT); + } + + /** + * Creates a copy of a CtMethod object. + * The created method must be + * added to a class with CtClass.addMethod(). + * + *

All occurrences of class names in the created method + * are replaced with names specified by + * map if map is not null. + * + *

For example, suppose that a method at() is as + * follows: + * + * 

+     * public X at(int i) {
+     *     return (X)super.elementAt(i);
+     * }
+ * + *

(X is a class name.) If map substitutes + * String for X, then the created method is: + * + * 

+     * public String at(int i) {
+     *     return (String)super.elementAt(i);
+     * }
+ * + *

By default, all the occurrences of the names of the class + * declaring at() and the superclass are replaced + * with the name of the class and the superclass that the + * created method is added to. + * This is done whichever map is null or not. + * To prevent this replacement, call ClassMap.fix() + * or put() to explicitly specify replacement. + * + *

Note: if the .class notation (for example, + * String.class) is included in an expression, the + * Javac compiler may produce a helper method. + * Since this constructor never + * copies this helper method, the programmers have the responsiblity of + * copying it. Otherwise, use Class.forName() in the + * expression. + * + * @param src the source method. + * @param declaring the class to which the created method is added. + * @param map the hashtable associating original class names + * with substituted names. + * It can be null. + * + * @see CtClass#addMethod(CtMethod) + * @see ClassMap#fix(String) + */ + public CtMethod(CtMethod src, CtClass declaring, ClassMap map) + throws CannotCompileException + { + this(null, declaring); + copy(src, false, map); + } + + /** + * Compiles the given source code and creates a method. + * This method simply delegates to make() in + * CtNewMethod. See it for more details. + * CtNewMethod has a number of useful factory methods. + * + * @param src the source text. + * @param declaring the class to which the created method is added. + * @see CtNewMethod#make(String, CtClass) + */ + public static CtMethod make(String src, CtClass declaring) + throws CannotCompileException + { + return CtNewMethod.make(src, declaring); + } + + /** + * Creates a method from a MethodInfo object. + * + * @param declaring the class declaring the method. + * @throws CannotCompileException if the the MethodInfo + * object and the declaring class have different + * ConstPool objects + * @since 3.6 + */ + public static CtMethod make(MethodInfo minfo, CtClass declaring) + throws CannotCompileException + { + if (declaring.getClassFile2().getConstPool() != minfo.getConstPool()) + throw new CannotCompileException("bad declaring class"); + + return new CtMethod(minfo, declaring); + } + + /** + * Returns a hash code value for the method. + * If two methods have the same name and signature, then + * the hash codes for the two methods are equal. + */ + public int hashCode() { + return getStringRep().hashCode(); + } + + /** + * This method is invoked when setName() or replaceClassName() + * in CtClass is called. + */ + void nameReplaced() { + cachedStringRep = null; + } + + /* This method is also called by CtClassType.getMethods0(). + */ + final String getStringRep() { + if (cachedStringRep == null) + cachedStringRep = methodInfo.getName() + + Descriptor.getParamDescriptor(methodInfo.getDescriptor()); + + return cachedStringRep; + } + + /** + * Indicates whether obj has the same name and the + * same signature as this method. + */ + public boolean equals(Object obj) { + return obj != null && obj instanceof CtMethod + && ((CtMethod)obj).getStringRep().equals(getStringRep()); + } + + /** + * Returns the method name followed by parameter types + * such as javassist.CtMethod.setBody(String). + * + * @since 3.5 + */ + public String getLongName() { + return getDeclaringClass().getName() + "." + + getName() + Descriptor.toString(getSignature()); + } + + /** + * Obtains the name of this method. + */ + public String getName() { + return methodInfo.getName(); + } + + /** + * Changes the name of this method. + */ + public void setName(String newname) { + declaringClass.checkModify(); + methodInfo.setName(newname); + } + + /** + * Obtains the type of the returned value. + */ + public CtClass getReturnType() throws NotFoundException { + return getReturnType0(); + } + + /** + * Returns true if the method body is empty, that is, {}. + * It also returns true if the method is an abstract method. + */ + public boolean isEmpty() { + CodeAttribute ca = getMethodInfo2().getCodeAttribute(); + if (ca == null) // abstract or native + return (getModifiers() & Modifier.ABSTRACT) != 0; + + CodeIterator it = ca.iterator(); + try { + return it.hasNext() && it.byteAt(it.next()) == Opcode.RETURN + && !it.hasNext(); + } + catch (BadBytecode e) {} + return false; + } + + /** + * Copies a method body from another method. + * If this method is abstract, the abstract modifier is removed + * after the method body is copied. + * + *

All occurrences of the class names in the copied method body + * are replaced with the names specified by + * map if map is not null. + * + * @param src the method that the body is copied from. + * @param map the hashtable associating original class names + * with substituted names. + * It can be null. + */ + public void setBody(CtMethod src, ClassMap map) + throws CannotCompileException + { + setBody0(src.declaringClass, src.methodInfo, + declaringClass, methodInfo, map); + } + + /** + * Replace a method body with a new method body wrapping the + * given method. + * + * @param mbody the wrapped method + * @param constParam the constant parameter given to + * the wrapped method + * (maybe null). + * + * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) + */ + public void setWrappedBody(CtMethod mbody, ConstParameter constParam) + throws CannotCompileException + { + declaringClass.checkModify(); + + CtClass clazz = getDeclaringClass(); + CtClass[] params; + CtClass retType; + try { + params = getParameterTypes(); + retType = getReturnType(); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + Bytecode code = CtNewWrappedMethod.makeBody(clazz, + clazz.getClassFile2(), + mbody, + params, retType, + constParam); + CodeAttribute cattr = code.toCodeAttribute(); + methodInfo.setCodeAttribute(cattr); + methodInfo.setAccessFlags(methodInfo.getAccessFlags() + & ~AccessFlag.ABSTRACT); + // rebuilding a stack map table is not needed. + } + + // inner classes + + /** + * Instances of this class represent a constant parameter. + * They are used to specify the parameter given to the methods + * created by CtNewMethod.wrapped(). + * + * @see CtMethod#setWrappedBody(CtMethod,CtMethod.ConstParameter) + * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) + * @see CtNewConstructor#make(CtClass[],CtClass[],int,CtMethod,CtMethod.ConstParameter,CtClass) + */ + public static class ConstParameter { + /** + * Makes an integer constant. + * + * @param i the constant value. + */ + public static ConstParameter integer(int i) { + return new IntConstParameter(i); + } + + /** + * Makes a long integer constant. + * + * @param i the constant value. + */ + public static ConstParameter integer(long i) { + return new LongConstParameter(i); + } + + /** + * Makes an String constant. + * + * @param s the constant value. + */ + public static ConstParameter string(String s) { + return new StringConstParameter(s); + } + + ConstParameter() {} + + /** + * @return the size of the stack consumption. + */ + int compile(Bytecode code) throws CannotCompileException { + return 0; + } + + String descriptor() { + return defaultDescriptor(); + } + + /** + * @see CtNewWrappedMethod + */ + static String defaultDescriptor() { + return "([Ljava/lang/Object;)Ljava/lang/Object;"; + } + + /** + * Returns the descriptor for constructors. + * + * @see CtNewWrappedConstructor + */ + String constDescriptor() { + return defaultConstDescriptor(); + } + + /** + * Returns the default descriptor for constructors. + */ + static String defaultConstDescriptor() { + return "([Ljava/lang/Object;)V"; + } + } + + static class IntConstParameter extends ConstParameter { + int param; + + IntConstParameter(int i) { + param = i; + } + + int compile(Bytecode code) throws CannotCompileException { + code.addIconst(param); + return 1; + } + + String descriptor() { + return "([Ljava/lang/Object;I)Ljava/lang/Object;"; + } + + String constDescriptor() { + return "([Ljava/lang/Object;I)V"; + } + } + + static class LongConstParameter extends ConstParameter { + long param; + + LongConstParameter(long l) { + param = l; + } + + int compile(Bytecode code) throws CannotCompileException { + code.addLconst(param); + return 2; + } + + String descriptor() { + return "([Ljava/lang/Object;J)Ljava/lang/Object;"; + } + + String constDescriptor() { + return "([Ljava/lang/Object;J)V"; + } + } + + static class StringConstParameter extends ConstParameter { + String param; + + StringConstParameter(String s) { + param = s; + } + + int compile(Bytecode code) throws CannotCompileException { + code.addLdc(param); + return 1; + } + + String descriptor() { + return "([Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;"; + } + + String constDescriptor() { + return "([Ljava/lang/Object;Ljava/lang/String;)V"; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java b/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java new file mode 100644 index 0000000..1db1989 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java @@ -0,0 +1,126 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.DataOutputStream; +import java.io.IOException; +import com.wenshuo.agent.javassist.bytecode.ClassFile; + +class CtNewClass extends CtClassType { + /* true if the class is an interface. + */ + protected boolean hasConstructor; + + CtNewClass(String name, ClassPool cp, + boolean isInterface, CtClass superclass) { + super(name, cp); + wasChanged = true; + String superName; + if (isInterface || superclass == null) + superName = null; + else + superName = superclass.getName(); + + classfile = new ClassFile(isInterface, name, superName); + if (isInterface && superclass != null) + classfile.setInterfaces(new String[] { superclass.getName() }); + + setModifiers(Modifier.setPublic(getModifiers())); + hasConstructor = isInterface; + } + + protected void extendToString(StringBuffer buffer) { + if (hasConstructor) + buffer.append("hasConstructor "); + + super.extendToString(buffer); + } + + public void addConstructor(CtConstructor c) + throws CannotCompileException + { + hasConstructor = true; + super.addConstructor(c); + } + + public void toBytecode(DataOutputStream out) + throws CannotCompileException, IOException + { + if (!hasConstructor) + try { + inheritAllConstructors(); + hasConstructor = true; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + super.toBytecode(out); + } + + /** + * Adds constructors inhrited from the super class. + * + *

After this method is called, the class inherits all the + * constructors from the super class. The added constructor + * calls the super's constructor with the same signature. + */ + public void inheritAllConstructors() + throws CannotCompileException, NotFoundException + { + CtClass superclazz; + CtConstructor[] cs; + + superclazz = getSuperclass(); + cs = superclazz.getDeclaredConstructors(); + + int n = 0; + for (int i = 0; i < cs.length; ++i) { + CtConstructor c = cs[i]; + int mod = c.getModifiers(); + if (isInheritable(mod, superclazz)) { + CtConstructor cons + = CtNewConstructor.make(c.getParameterTypes(), + c.getExceptionTypes(), this); + cons.setModifiers(mod & (Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE)); + addConstructor(cons); + ++n; + } + } + + if (n < 1) + throw new CannotCompileException( + "no inheritable constructor in " + superclazz.getName()); + + } + + private boolean isInheritable(int mod, CtClass superclazz) { + if (Modifier.isPrivate(mod)) + return false; + + if (Modifier.isPackage(mod)) { + String pname = getPackageName(); + String pname2 = superclazz.getPackageName(); + if (pname == null) + return pname2 == null; + else + return pname.equals(pname2); + } + + return true; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java b/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java new file mode 100644 index 0000000..18c929d --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java @@ -0,0 +1,319 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; + +/** + * A collection of static methods for creating a CtConstructor. + * An instance of this class does not make any sense. + * + *

A class initializer (static constructor) cannot be created by the + * methods in this class. Call makeClassInitializer() in + * CtClass and append code snippet to the body of the class + * initializer obtained by makeClassInitializer(). + * + * @see CtClass#addConstructor(CtConstructor) + * @see CtClass#makeClassInitializer() + */ +public class CtNewConstructor { + /** + * Specifies that no parameters are passed to a super-class' + * constructor. That is, the default constructor is invoked. + */ + public static final int PASS_NONE = 0; // call super() + + /** + * Specifies that parameters are converted into an array of + * Object and passed to a super-class' + * constructor. + */ + public static final int PASS_ARRAY = 1; // an array of parameters + + /** + * Specifies that parameters are passed as is + * to a super-class' constructor. The signature of that + * constructor must be the same as that of the created constructor. + */ + public static final int PASS_PARAMS = 2; + + /** + * Compiles the given source code and creates a constructor. + * The source code must include not only the constructor body + * but the whole declaration. + * + * @param src the source text. + * @param declaring the class to which the created constructor is added. + */ + public static CtConstructor make(String src, CtClass declaring) + throws CannotCompileException + { + Javac compiler = new Javac(declaring); + try { + CtMember obj = compiler.compile(src); + if (obj instanceof CtConstructor) { + // a stack map table has been already created. + return (CtConstructor)obj; + } + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + + throw new CannotCompileException("not a constructor"); + } + + /** + * Creates a public constructor. + * + * @param parameters a list of the parameter types. + * @param exceptions a list of the exception types. + * @param body the source text of the constructor body. + * It must be a block surrounded by {}. + * If it is null, the substituted + * constructor body does nothing except calling + * super(). + * @param declaring the class to which the created method is added. + */ + public static CtConstructor make(CtClass[] parameters, + CtClass[] exceptions, + String body, CtClass declaring) + throws CannotCompileException + { + try { + CtConstructor cc = new CtConstructor(parameters, declaring); + cc.setExceptionTypes(exceptions); + cc.setBody(body); + return cc; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + /** + * Creates a copy of a constructor. + * This is a convenience method for calling + * {@link CtConstructor#CtConstructor(CtConstructor, CtClass, ClassMap) this constructor}. + * See the description of the constructor for particular behavior of the copying. + * + * @param c the copied constructor. + * @param declaring the class to which the created method is added. + * @param map the hash table associating original class names + * with substituted names. + * It can be null. + * + * @see CtConstructor#CtConstructor(CtConstructor,CtClass,ClassMap) + */ + public static CtConstructor copy(CtConstructor c, CtClass declaring, + ClassMap map) throws CannotCompileException { + return new CtConstructor(c, declaring, map); + } + + /** + * Creates a default (public) constructor. + * + *

The created constructor takes no parameter. It calls + * super(). + */ + public static CtConstructor defaultConstructor(CtClass declaring) + throws CannotCompileException + { + CtConstructor cons = new CtConstructor((CtClass[])null, declaring); + + ConstPool cp = declaring.getClassFile2().getConstPool(); + Bytecode code = new Bytecode(cp, 1, 1); + code.addAload(0); + try { + code.addInvokespecial(declaring.getSuperclass(), + "", "()V"); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + code.add(Bytecode.RETURN); + + // no need to construct a stack map table. + cons.getMethodInfo2().setCodeAttribute(code.toCodeAttribute()); + return cons; + } + + /** + * Creates a public constructor that only calls a constructor + * in the super class. The created constructor receives parameters + * specified by parameters but calls the super's + * constructor without those parameters (that is, it calls the default + * constructor). + * + *

The parameters passed to the created constructor should be + * used for field initialization. CtField.Initializer + * objects implicitly insert initialization code in constructor + * bodies. + * + * @param parameters parameter types + * @param exceptions exception types + * @param declaring the class to which the created constructor + * is added. + * @see CtField.Initializer#byParameter(int) + */ + public static CtConstructor skeleton(CtClass[] parameters, + CtClass[] exceptions, CtClass declaring) + throws CannotCompileException + { + return make(parameters, exceptions, PASS_NONE, + null, null, declaring); + } + + /** + * Creates a public constructor that only calls a constructor + * in the super class. The created constructor receives parameters + * specified by parameters and calls the super's + * constructor with those parameters. + * + * @param parameters parameter types + * @param exceptions exception types + * @param declaring the class to which the created constructor + * is added. + */ + public static CtConstructor make(CtClass[] parameters, + CtClass[] exceptions, CtClass declaring) + throws CannotCompileException + { + return make(parameters, exceptions, PASS_PARAMS, + null, null, declaring); + } + + /** + * Creates a public constructor. + * + *

If howto is PASS_PARAMS, + * the created constructor calls the super's constructor with the + * same signature. The superclass must contain + * a constructor taking the same set of parameters as the created one. + * + *

If howto is PASS_NONE, + * the created constructor calls the super's default constructor. + * The superclass must contain a constructor taking no parameters. + * + *

If howto is PASS_ARRAY, + * the created constructor calls the super's constructor + * with the given parameters in the form of an array of + * Object. The signature of the super's constructor + * must be: + * + * 

constructor(Object[] params, <type> cvalue)
+     *
+ * + *

Here, cvalue is the constant value specified + * by cparam. + * + *

If cparam is null, the signature + * must be: + * + * 

constructor(Object[] params)
+ * + *

If body is not null, a copy of that method is + * embedded in the body of the created constructor. + * The embedded method is executed after + * the super's constructor is called and the values of fields are + * initialized. Note that body must not + * be a constructor but a method. + * + *

Since the embedded method is wrapped + * in parameter-conversion code + * as in CtNewMethod.wrapped(), + * the constructor parameters are + * passed in the form of an array of Object. + * The method specified by body must have the + * signature shown below: + * + * 

Object method(Object[] params, <type> cvalue)
+ * + *

If cparam is null, the signature + * must be: + * + * 

Object method(Object[] params)
+ * + *

Although the type of the returned value is Object, + * the value must be always null. + * + *

Example: + * + * 

+     * ClassPool pool = ... ;
+     * CtClass xclass = pool.makeClass("X");
+     * CtMethod method = pool.getMethod("Sample", "m");
+     * xclass.setSuperclass(pool.get("Y"));
+     * CtClass[] argTypes = { CtClass.intType };
+     * ConstParameter cparam = ConstParameter.string("test");
+     * CtConstructor c = CtNewConstructor.make(argTypes, null,
+     *                                  PASS_PARAMS, method, cparam, xclass);
+     * xclass.addConstructor(c);
+ * + *

where the class Sample is as follows: + * + * 

+     * public class Sample {
+     *     public Object m(Object[] args, String msg) {
+     *         System.out.println(msg);
+     *         return null;
+     *     }
+     * }
+ * + *

This program produces the following class: + * + * 

+     * public class X extends Y {
+     *     public X(int p0) {
+     *         super(p0);
+     *         String msg = "test";
+     *         Object[] args = new Object[] { p0 };
+     *         // begin of copied body
+     *         System.out.println(msg);
+     *         Object result = null;
+     *         // end
+     *     }
+     * }
+ * + * @param parameters a list of the parameter types + * @param exceptions a list of the exceptions + * @param howto how to pass parameters to the super-class' + * constructor (PASS_NONE, + * PASS_ARRAY, + * or PASS_PARAMS) + * @param body appended body (may be null). + * It must be not a constructor but a method. + * @param cparam constant parameter (may be null.) + * @param declaring the class to which the created constructor + * is added. + * + * @see CtNewMethod#wrapped(CtClass,String,CtClass[],CtClass[],CtMethod,CtMethod.ConstParameter,CtClass) + */ + public static CtConstructor make(CtClass[] parameters, + CtClass[] exceptions, int howto, + CtMethod body, ConstParameter cparam, + CtClass declaring) + throws CannotCompileException + { + return CtNewWrappedConstructor.wrapped(parameters, exceptions, + howto, body, cparam, declaring); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java b/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java new file mode 100644 index 0000000..d55a464 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java @@ -0,0 +1,478 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.Javac; +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; + +/** + * A collection of static methods for creating a CtMethod. + * An instance of this class does not make any sense. + * + * @see CtClass#addMethod(CtMethod) + */ +public class CtNewMethod { + + /** + * Compiles the given source code and creates a method. + * The source code must include not only the method body + * but the whole declaration, for example, + * + * 
"public Object id(Object obj) { return obj; }"
+ * + * @param src the source text. + * @param declaring the class to which the created method is added. + */ + public static CtMethod make(String src, CtClass declaring) + throws CannotCompileException + { + return make(src, declaring, null, null); + } + + /** + * Compiles the given source code and creates a method. + * The source code must include not only the method body + * but the whole declaration, for example, + * + * 
"public Object id(Object obj) { return obj; }"
+ * + *

If the source code includes $proceed(), then + * it is compiled into a method call on the specified object. + * + * @param src the source text. + * @param declaring the class to which the created method is added. + * @param delegateObj the source text specifying the object + * that is called on by $proceed(). + * @param delegateMethod the name of the method + * that is called by $proceed(). + */ + public static CtMethod make(String src, CtClass declaring, + String delegateObj, String delegateMethod) + throws CannotCompileException + { + Javac compiler = new Javac(declaring); + try { + if (delegateMethod != null) + compiler.recordProceed(delegateObj, delegateMethod); + + CtMember obj = compiler.compile(src); + if (obj instanceof CtMethod) + return (CtMethod)obj; + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + + throw new CannotCompileException("not a method"); + } + + /** + * Creates a public (non-static) method. The created method cannot + * be changed to a static method later. + * + * @param returnType the type of the returned value. + * @param mname the method name. + * @param parameters a list of the parameter types. + * @param exceptions a list of the exception types. + * @param body the source text of the method body. + * It must be a block surrounded by {}. + * If it is null, the created method + * does nothing except returning zero or null. + * @param declaring the class to which the created method is added. + * @see #make(int, CtClass, String, CtClass[], CtClass[], String, CtClass) + */ + public static CtMethod make(CtClass returnType, + String mname, CtClass[] parameters, + CtClass[] exceptions, + String body, CtClass declaring) + throws CannotCompileException + { + return make(Modifier.PUBLIC, returnType, mname, parameters, exceptions, + body, declaring); + } + + /** + * Creates a method. modifiers can contain + * Modifier.STATIC. + * + * @param modifiers access modifiers. + * @param returnType the type of the returned value. + * @param mname the method name. + * @param parameters a list of the parameter types. + * @param exceptions a list of the exception types. + * @param body the source text of the method body. + * It must be a block surrounded by {}. + * If it is null, the created method + * does nothing except returning zero or null. + * @param declaring the class to which the created method is added. + * + * @see Modifier + */ + public static CtMethod make(int modifiers, CtClass returnType, + String mname, CtClass[] parameters, + CtClass[] exceptions, + String body, CtClass declaring) + throws CannotCompileException + { + try { + CtMethod cm + = new CtMethod(returnType, mname, parameters, declaring); + cm.setModifiers(modifiers); + cm.setExceptionTypes(exceptions); + cm.setBody(body); + return cm; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + /** + * Creates a copy of a method. This method is provided for creating + * a new method based on an existing method. + * This is a convenience method for calling + * {@link CtMethod#CtMethod(CtMethod, CtClass, ClassMap) this constructor}. + * See the description of the constructor for particular behavior of the copying. + * + * @param src the source method. + * @param declaring the class to which the created method is added. + * @param map the hash table associating original class names + * with substituted names. + * It can be null. + * + * @see CtMethod#CtMethod(CtMethod,CtClass,ClassMap) + */ + public static CtMethod copy(CtMethod src, CtClass declaring, + ClassMap map) throws CannotCompileException { + return new CtMethod(src, declaring, map); + } + + /** + * Creates a copy of a method with a new name. + * This method is provided for creating + * a new method based on an existing method. + * This is a convenience method for calling + * {@link CtMethod#CtMethod(CtMethod, CtClass, ClassMap) this constructor}. + * See the description of the constructor for particular behavior of the copying. + * + * @param src the source method. + * @param name the name of the created method. + * @param declaring the class to which the created method is added. + * @param map the hash table associating original class names + * with substituted names. + * It can be null. + * + * @see CtMethod#CtMethod(CtMethod,CtClass,ClassMap) + */ + public static CtMethod copy(CtMethod src, String name, CtClass declaring, + ClassMap map) throws CannotCompileException { + CtMethod cm = new CtMethod(src, declaring, map); + cm.setName(name); + return cm; + } + + /** + * Creates a public abstract method. + * + * @param returnType the type of the returned value + * @param mname the method name + * @param parameters a list of the parameter types + * @param exceptions a list of the exception types + * @param declaring the class to which the created method is added. + * + * @see CtMethod#CtMethod(CtClass,String,CtClass[],CtClass) + */ + public static CtMethod abstractMethod(CtClass returnType, + String mname, + CtClass[] parameters, + CtClass[] exceptions, + CtClass declaring) + throws NotFoundException + { + CtMethod cm = new CtMethod(returnType, mname, parameters, declaring); + cm.setExceptionTypes(exceptions); + return cm; + } + + /** + * Creates a public getter method. The getter method returns the value + * of the specified field in the class to which this method is added. + * The created method is initially not static even if the field is + * static. Change the modifiers if the method should be static. + * + * @param methodName the name of the getter + * @param field the field accessed. + */ + public static CtMethod getter(String methodName, CtField field) + throws CannotCompileException + { + FieldInfo finfo = field.getFieldInfo2(); + String fieldType = finfo.getDescriptor(); + String desc = "()" + fieldType; + ConstPool cp = finfo.getConstPool(); + MethodInfo minfo = new MethodInfo(cp, methodName, desc); + minfo.setAccessFlags(AccessFlag.PUBLIC); + + Bytecode code = new Bytecode(cp, 2, 1); + try { + String fieldName = finfo.getName(); + if ((finfo.getAccessFlags() & AccessFlag.STATIC) == 0) { + code.addAload(0); + code.addGetfield(Bytecode.THIS, fieldName, fieldType); + } + else + code.addGetstatic(Bytecode.THIS, fieldName, fieldType); + + code.addReturn(field.getType()); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + minfo.setCodeAttribute(code.toCodeAttribute()); + CtClass cc = field.getDeclaringClass(); + // a stack map is not needed. + return new CtMethod(minfo, cc); + } + + /** + * Creates a public setter method. The setter method assigns the + * value of the first parameter to the specified field + * in the class to which this method is added. + * The created method is not static even if the field is + * static. You may not change it to be static + * by setModifiers() in CtBehavior. + * + * @param methodName the name of the setter + * @param field the field accessed. + */ + public static CtMethod setter(String methodName, CtField field) + throws CannotCompileException + { + FieldInfo finfo = field.getFieldInfo2(); + String fieldType = finfo.getDescriptor(); + String desc = "(" + fieldType + ")V"; + ConstPool cp = finfo.getConstPool(); + MethodInfo minfo = new MethodInfo(cp, methodName, desc); + minfo.setAccessFlags(AccessFlag.PUBLIC); + + Bytecode code = new Bytecode(cp, 3, 3); + try { + String fieldName = finfo.getName(); + if ((finfo.getAccessFlags() & AccessFlag.STATIC) == 0) { + code.addAload(0); + code.addLoad(1, field.getType()); + code.addPutfield(Bytecode.THIS, fieldName, fieldType); + } + else { + code.addLoad(1, field.getType()); + code.addPutstatic(Bytecode.THIS, fieldName, fieldType); + } + + code.addReturn(null); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + minfo.setCodeAttribute(code.toCodeAttribute()); + CtClass cc = field.getDeclaringClass(); + // a stack map is not needed. + return new CtMethod(minfo, cc); + } + + /** + * Creates a method forwarding to a delegate in + * a super class. The created method calls a method specified + * by delegate with all the parameters passed to the + * created method. If the delegate method returns a value, + * the created method returns that value to the caller. + * The delegate method must be declared in a super class. + * + *

The following method is an example of the created method. + * + * 

+     * int f(int p, int q) {
+     *     return super.f(p, q);
+     * }
+ * + *

The name of the created method can be changed by + * setName(). + * + * @param delegate the method that the created method forwards to. + * @param declaring the class to which the created method is + * added. + */ + public static CtMethod delegator(CtMethod delegate, CtClass declaring) + throws CannotCompileException + { + try { + return delegator0(delegate, declaring); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + private static CtMethod delegator0(CtMethod delegate, CtClass declaring) + throws CannotCompileException, NotFoundException + { + MethodInfo deleInfo = delegate.getMethodInfo2(); + String methodName = deleInfo.getName(); + String desc = deleInfo.getDescriptor(); + ConstPool cp = declaring.getClassFile2().getConstPool(); + MethodInfo minfo = new MethodInfo(cp, methodName, desc); + minfo.setAccessFlags(deleInfo.getAccessFlags()); + + ExceptionsAttribute eattr = deleInfo.getExceptionsAttribute(); + if (eattr != null) + minfo.setExceptionsAttribute( + (ExceptionsAttribute)eattr.copy(cp, null)); + + Bytecode code = new Bytecode(cp, 0, 0); + boolean isStatic = Modifier.isStatic(delegate.getModifiers()); + CtClass deleClass = delegate.getDeclaringClass(); + CtClass[] params = delegate.getParameterTypes(); + int s; + if (isStatic) { + s = code.addLoadParameters(params, 0); + code.addInvokestatic(deleClass, methodName, desc); + } + else { + code.addLoad(0, deleClass); + s = code.addLoadParameters(params, 1); + code.addInvokespecial(deleClass, methodName, desc); + } + + code.addReturn(delegate.getReturnType()); + code.setMaxLocals(++s); + code.setMaxStack(s < 2 ? 2 : s); // for a 2-word return value + minfo.setCodeAttribute(code.toCodeAttribute()); + // a stack map is not needed. + return new CtMethod(minfo, declaring); + } + + /** + * Creates a wrapped method. The wrapped method receives parameters + * in the form of an array of Object. + * + *

The body of the created method is a copy of the body of the method + * specified by body. However, it is wrapped in + * parameter-conversion code. + * + *

The method specified by body must have this singature: + * + * 

Object method(Object[] params, <type> cvalue)
+ * + *

The type of the cvalue depends on + * constParam. + * If constParam is null, the signature + * must be: + * + * 

Object method(Object[] params)
+ * + *

The method body copied from body is wrapped in + * parameter-conversion code, which converts parameters specified by + * parameterTypes into an array of Object. + * The returned value is also converted from the Object + * type to the type specified by returnType. Thus, + * the resulting method body is as follows: + * + * 

+     * Object[] params = new Object[] { p0, p1, ... };
+     * <type> cvalue = <constant-value>;
+     *  ... copied method body ...
+     * Object result = <returned value>
+     * return (<returnType>)result;
+     *
+ * + *

The variables p0, p2, ... represent + * formal parameters of the created method. + * The value of cvalue is specified by + * constParam. + * + *

If the type of a parameter or a returned value is a primitive + * type, then the value is converted into a wrapper object such as + * java.lang.Integer. If the type of the returned value + * is void, the returned value is discarded. + * + *

Example: + * + * 

+     * ClassPool pool = ... ;
+     * CtClass vec = pool.makeClass("intVector");
+     * vec.setSuperclass(pool.get("java.util.Vector"));
+     * CtMethod addMethod = pool.getMethod("Sample", "add0");
+     *
+     * CtClass[] argTypes = { CtClass.intType };
+     * CtMethod m = CtNewMethod.wrapped(CtClass.voidType, "add", argTypes,
+     *                                  null, addMethod, null, vec);
+     * vec.addMethod(m);
+ * + *

where the class Sample is as follows: + * + * 

public class Sample extends java.util.Vector {
+     *     public Object add0(Object[] args) {
+     *         super.addElement(args[0]);
+     *         return null;
+     *     }
+     * }
+ * + *

This program produces a class intVector: + * + * 

public class intVector extends java.util.Vector {
+     *     public void add(int p0) {
+     *         Object[] args = new Object[] { p0 };
+     *         // begin of the copied body
+     *         super.addElement(args[0]);
+     *         Object result = null;
+     *         // end
+     *     }
+     * }
+ * + *

Note that the type of the parameter to add() depends + * only on the value of argTypes passed to + * CtNewMethod.wrapped(). Thus, it is easy to + * modify this program to produce a + * StringVector class, which is a vector containing + * only String objects, and other vector classes. + * + * @param returnType the type of the returned value. + * @param mname the method name. + * @param parameterTypes a list of the parameter types. + * @param exceptionTypes a list of the exception types. + * @param body the method body + * (must not be a static method). + * @param constParam the constant parameter + * (maybe null). + * @param declaring the class to which the created method is + * added. + */ + public static CtMethod wrapped(CtClass returnType, + String mname, + CtClass[] parameterTypes, + CtClass[] exceptionTypes, + CtMethod body, ConstParameter constParam, + CtClass declaring) + throws CannotCompileException + { + return CtNewWrappedMethod.wrapped(returnType, mname, parameterTypes, + exceptionTypes, body, constParam, declaring); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java b/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java new file mode 100644 index 0000000..4fb89b0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java @@ -0,0 +1,67 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.AccessFlag; +import com.wenshuo.agent.javassist.bytecode.InnerClassesAttribute; + +/** + * A newly created public nested class. + */ +class CtNewNestedClass extends CtNewClass { + CtNewNestedClass(String realName, ClassPool cp, boolean isInterface, + CtClass superclass) { + super(realName, cp, isInterface, superclass); + } + + /** + * This method does not change the STATIC bit. The original value is kept. + */ + public void setModifiers(int mod) { + mod = mod & ~Modifier.STATIC; + super.setModifiers(mod); + updateInnerEntry(mod, getName(), this, true); + } + + private static void updateInnerEntry(int mod, String name, CtClass clazz, boolean outer) { + ClassFile cf = clazz.getClassFile2(); + InnerClassesAttribute ica = (InnerClassesAttribute)cf.getAttribute( + InnerClassesAttribute.tag); + if (ica == null) + return; + + int n = ica.tableLength(); + for (int i = 0; i < n; i++) + if (name.equals(ica.innerClass(i))) { + int acc = ica.accessFlags(i) & AccessFlag.STATIC; + ica.setAccessFlags(i, mod | acc); + String outName = ica.outerClass(i); + if (outName != null && outer) + try { + CtClass parent = clazz.getClassPool().get(outName); + updateInnerEntry(mod, name, parent, false); + } + catch (NotFoundException e) { + throw new RuntimeException("cannot find the declaring class: " + + outName); + } + + break; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java b/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java new file mode 100644 index 0000000..d507162 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java @@ -0,0 +1,103 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; + +class CtNewWrappedConstructor extends CtNewWrappedMethod { + private static final int PASS_NONE = CtNewConstructor.PASS_NONE; + // private static final int PASS_ARRAY = CtNewConstructor.PASS_ARRAY; + private static final int PASS_PARAMS = CtNewConstructor.PASS_PARAMS; + + public static CtConstructor wrapped(CtClass[] parameterTypes, + CtClass[] exceptionTypes, + int howToCallSuper, + CtMethod body, + ConstParameter constParam, + CtClass declaring) + throws CannotCompileException + { + try { + CtConstructor cons = new CtConstructor(parameterTypes, declaring); + cons.setExceptionTypes(exceptionTypes); + Bytecode code = makeBody(declaring, declaring.getClassFile2(), + howToCallSuper, body, + parameterTypes, constParam); + cons.getMethodInfo2().setCodeAttribute(code.toCodeAttribute()); + // a stack map table is not needed. + return cons; + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + } + + protected static Bytecode makeBody(CtClass declaring, ClassFile classfile, + int howToCallSuper, + CtMethod wrappedBody, + CtClass[] parameters, + ConstParameter cparam) + throws CannotCompileException + { + int stacksize, stacksize2; + + int superclazz = classfile.getSuperclassId(); + Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0); + code.setMaxLocals(false, parameters, 0); + code.addAload(0); + if (howToCallSuper == PASS_NONE) { + stacksize = 1; + code.addInvokespecial(superclazz, "", "()V"); + } + else if (howToCallSuper == PASS_PARAMS) { + stacksize = code.addLoadParameters(parameters, 1) + 1; + code.addInvokespecial(superclazz, "", + Descriptor.ofConstructor(parameters)); + } + else { + stacksize = compileParameterList(code, parameters, 1); + String desc; + if (cparam == null) { + stacksize2 = 2; + desc = ConstParameter.defaultConstDescriptor(); + } + else { + stacksize2 = cparam.compile(code) + 2; + desc = cparam.constDescriptor(); + } + + if (stacksize < stacksize2) + stacksize = stacksize2; + + code.addInvokespecial(superclazz, "", desc); + } + + if (wrappedBody == null) + code.add(Bytecode.RETURN); + else { + stacksize2 = makeBody0(declaring, classfile, wrappedBody, + false, parameters, CtClass.voidType, + cparam, code); + if (stacksize < stacksize2) + stacksize = stacksize2; + } + + code.setMaxStack(stacksize); + return code; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java b/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java new file mode 100644 index 0000000..da2ad8b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java @@ -0,0 +1,199 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.JvstCodeGen; +import java.util.Hashtable; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; + +class CtNewWrappedMethod { + + private static final String addedWrappedMethod = "_added_m$"; + + public static CtMethod wrapped(CtClass returnType, String mname, + CtClass[] parameterTypes, + CtClass[] exceptionTypes, + CtMethod body, ConstParameter constParam, + CtClass declaring) + throws CannotCompileException + { + CtMethod mt = new CtMethod(returnType, mname, parameterTypes, + declaring); + mt.setModifiers(body.getModifiers()); + try { + mt.setExceptionTypes(exceptionTypes); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + Bytecode code = makeBody(declaring, declaring.getClassFile2(), body, + parameterTypes, returnType, constParam); + MethodInfo minfo = mt.getMethodInfo2(); + minfo.setCodeAttribute(code.toCodeAttribute()); + // a stack map has been already created. + return mt; + } + + static Bytecode makeBody(CtClass clazz, ClassFile classfile, + CtMethod wrappedBody, + CtClass[] parameters, + CtClass returnType, + ConstParameter cparam) + throws CannotCompileException + { + boolean isStatic = Modifier.isStatic(wrappedBody.getModifiers()); + Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0); + int stacksize = makeBody0(clazz, classfile, wrappedBody, isStatic, + parameters, returnType, cparam, code); + code.setMaxStack(stacksize); + code.setMaxLocals(isStatic, parameters, 0); + return code; + } + + /* The generated method body does not need a stack map table + * because it does not contain a branch instruction. + */ + protected static int makeBody0(CtClass clazz, ClassFile classfile, + CtMethod wrappedBody, + boolean isStatic, CtClass[] parameters, + CtClass returnType, ConstParameter cparam, + Bytecode code) + throws CannotCompileException + { + if (!(clazz instanceof CtClassType)) + throw new CannotCompileException("bad declaring class" + + clazz.getName()); + + if (!isStatic) + code.addAload(0); + + int stacksize = compileParameterList(code, parameters, + (isStatic ? 0 : 1)); + int stacksize2; + String desc; + if (cparam == null) { + stacksize2 = 0; + desc = ConstParameter.defaultDescriptor(); + } + else { + stacksize2 = cparam.compile(code); + desc = cparam.descriptor(); + } + + checkSignature(wrappedBody, desc); + + String bodyname; + try { + bodyname = addBodyMethod((CtClassType)clazz, classfile, + wrappedBody); + /* if an exception is thrown below, the method added above + * should be removed. (future work :<) + */ + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + + if (isStatic) + code.addInvokestatic(Bytecode.THIS, bodyname, desc); + else + code.addInvokespecial(Bytecode.THIS, bodyname, desc); + + compileReturn(code, returnType); // consumes 2 stack entries + + if (stacksize < stacksize2 + 2) + stacksize = stacksize2 + 2; + + return stacksize; + } + + private static void checkSignature(CtMethod wrappedBody, + String descriptor) + throws CannotCompileException + { + if (!descriptor.equals(wrappedBody.getMethodInfo2().getDescriptor())) + throw new CannotCompileException( + "wrapped method with a bad signature: " + + wrappedBody.getDeclaringClass().getName() + + '.' + wrappedBody.getName()); + } + + private static String addBodyMethod(CtClassType clazz, + ClassFile classfile, + CtMethod src) + throws BadBytecode, CannotCompileException + { + Hashtable bodies = clazz.getHiddenMethods(); + String bodyname = (String)bodies.get(src); + if (bodyname == null) { + do { + bodyname = addedWrappedMethod + clazz.getUniqueNumber(); + } while (classfile.getMethod(bodyname) != null); + ClassMap map = new ClassMap(); + map.put(src.getDeclaringClass().getName(), clazz.getName()); + MethodInfo body = new MethodInfo(classfile.getConstPool(), + bodyname, src.getMethodInfo2(), + map); + int acc = body.getAccessFlags(); + body.setAccessFlags(AccessFlag.setPrivate(acc)); + body.addAttribute(new SyntheticAttribute(classfile.getConstPool())); + // a stack map is copied. rebuilding it is not needed. + classfile.addMethod(body); + bodies.put(src, bodyname); + CtMember.Cache cache = clazz.hasMemberCache(); + if (cache != null) + cache.addMethod(new CtMethod(body, clazz)); + } + + return bodyname; + } + + /* compileParameterList() returns the stack size used + * by the produced code. + * + * @param regno the index of the local variable in which + * the first argument is received. + * (0: static method, 1: regular method.) + */ + static int compileParameterList(Bytecode code, + CtClass[] params, int regno) { + return JvstCodeGen.compileParameterList(code, params, regno); + } + + /* + * The produced codes cosume 1 or 2 stack entries. + */ + private static void compileReturn(Bytecode code, CtClass type) { + if (type.isPrimitive()) { + CtPrimitiveType pt = (CtPrimitiveType)type; + if (pt != CtClass.voidType) { + String wrapper = pt.getWrapperName(); + code.addCheckcast(wrapper); + code.addInvokevirtual(wrapper, pt.getGetMethodName(), + pt.getGetMethodDescriptor()); + } + + code.addOpcode(pt.getReturnOp()); + } + else { + code.addCheckcast(type); + code.addOpcode(Bytecode.ARETURN); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java b/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java new file mode 100644 index 0000000..bdd961b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java @@ -0,0 +1,112 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +/** + * An instance of CtPrimitiveType represents a primitive type. + * It is obtained from CtClass. + */ +public final class CtPrimitiveType extends CtClass { + private char descriptor; + private String wrapperName; + private String getMethodName; + private String mDescriptor; + private int returnOp; + private int arrayType; + private int dataSize; + + CtPrimitiveType(String name, char desc, String wrapper, + String methodName, String mDesc, int opcode, int atype, + int size) { + super(name); + descriptor = desc; + wrapperName = wrapper; + getMethodName = methodName; + mDescriptor = mDesc; + returnOp = opcode; + arrayType = atype; + dataSize = size; + } + + /** + * Returns true if this object represents a primitive + * Java type: boolean, byte, char, short, int, long, float, double, + * or void. + */ + public boolean isPrimitive() { return true; } + + /** + * Returns the modifiers for this type. + * For decoding, use javassist.Modifier. + * + * @see Modifier + */ + public int getModifiers() { + return Modifier.PUBLIC | Modifier.FINAL; + } + + /** + * Returns the descriptor representing this type. + * For example, if the type is int, then the descriptor is I. + */ + public char getDescriptor() { return descriptor; } + + /** + * Returns the name of the wrapper class. + * For example, if the type is int, then the wrapper class is + * java.lang.Integer. + */ + public String getWrapperName() { return wrapperName; } + + /** + * Returns the name of the method for retrieving the value + * from the wrapper object. + * For example, if the type is int, then the method name is + * intValue. + */ + public String getGetMethodName() { return getMethodName; } + + /** + * Returns the descriptor of the method for retrieving the value + * from the wrapper object. + * For example, if the type is int, then the method descriptor is + * ()I. + */ + public String getGetMethodDescriptor() { return mDescriptor; } + + /** + * Returns the opcode for returning a value of the type. + * For example, if the type is int, then the returned opcode is + * javassit.bytecode.Opcode.IRETURN. + */ + public int getReturnOp() { return returnOp; } + + /** + * Returns the array-type code representing the type. + * It is used for the newarray instruction. + * For example, if the type is int, then this method returns + * javassit.bytecode.Opcode.T_INT. + */ + public int getArrayType() { return arrayType; } + + /** + * Returns the data size of the primitive type. + * If the type is long or double, this method returns 2. + * Otherwise, it returns 1. + */ + public int getDataSize() { return dataSize; } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/Loader.java b/src/main/java/com/wenshuo/agent/javassist/Loader.java new file mode 100644 index 0000000..2c2e52f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/Loader.java @@ -0,0 +1,430 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.*; +import java.util.Hashtable; +import java.util.Vector; +import java.security.ProtectionDomain; + +/** + * The class loader for Javassist. + * + *

This is a sample class loader using ClassPool. + * Unlike a regular class loader, this class loader obtains bytecode + * from a ClassPool. + * + *

Note that Javassist can be used without this class loader; programmers + * can define their own versions of class loader. They can run + * a program even without any user-defined class loader if that program + * is statically translated with Javassist. + * This class loader is just provided as a utility class. + * + *

Suppose that an instance of MyTranslator implementing + * the interface Translator is responsible for modifying + * class files. + * The startup program of an application using MyTranslator + * should be something like this: + * + * 

+ * import com.wenshuo.agent.javassist.*;
+ *
+ * public class Main {
+ *   public static void main(String[] args) throws Throwable {
+ *     MyTranslator myTrans = new MyTranslator();
+ *     ClassPool cp = ClassPool.getDefault();
+ *     Loader cl = new Loader(cp);
+ *     cl.addTranslator(cp, myTrans);
+ *     cl.run("MyApp", args);
+ *   }
+ * }
+ *
+ * + *

Class MyApp is the main program of the application. + * + *

This program should be executed as follows: + * + * 

+ * % java Main arg1 arg2...
+ *
+ * + *

It modifies the class MyApp with a MyTranslator + * object before the JVM loads it. + * Then it calls main() in MyApp with arguments + * arg1, arg2, ... + * + *

This program execution is equivalent to: + * + * 

+ * % java MyApp arg1 arg2...
+ *
+ * + *

except that classes are translated by MyTranslator + * at load time. + * + *

If only a particular class must be modified when it is loaded, + * the startup program can be simpler; MyTranslator is + * unnecessary. For example, if only a class test.Rectangle + * is modified, the main() method above will be the following: + * + * 

+ * ClassPool cp = ClassPool.getDefault();
+ * Loader cl = new Loader(cp);
+ * CtClass ct = cp.get("test.Rectangle");
+ * ct.setSuperclass(cp.get("test.Point"));
+ * cl.run("MyApp", args);
+ * + *

This program changes the super class of the test.Rectangle + * class. + * + *

Note 1: + * + *

This class loader does not allow the users to intercept the loading + * of java.* and javax.* classes (and + * sun.*, org.xml.*, ...) unless + * Loader.doDelegation is false. This is because + * the JVM prohibits a user class loader from loading a system class. + * Also see Note 2. + * If this behavior is not appropriate, a subclass of Loader + * must be defined and loadClassByDelegation() must be overridden. + * + *

Note 2: + * + *

If classes are loaded with different class loaders, they belong to + * separate name spaces. If class C is loaded by a class + * loader CL, all classes that the class C + * refers to are also loaded by CL. However, if CL + * delegates the loading of the class C to CL', + * then those classes that the class C refers to + * are loaded by a parent class loader CL' + * instead of CL. + * + *

If an object of class C is assigned + * to a variable of class C belonging to a different name + * space, then a ClassCastException is thrown. + * + *

Because of the fact above, this loader delegates only the loading of + * javassist.Loader + * and classes included in package java.* and + * javax.* to the parent class + * loader. Other classes are directly loaded by this loader. + * + *

For example, suppose that java.lang.String would be loaded + * by this loader while java.io.File is loaded by the parent + * class loader. If the constructor of java.io.File is called + * with an instance of java.lang.String, then it may throw + * an exception since it accepts an instance of only the + * java.lang.String loaded by the parent class loader. + * + * @see javassist.ClassPool + * @see javassist.Translator + */ +public class Loader extends ClassLoader { + private Hashtable notDefinedHere; // must be atomic. + private Vector notDefinedPackages; // must be atomic. + private ClassPool source; + private Translator translator; + private ProtectionDomain domain; + + /** + * Specifies the algorithm of class loading. + * + *

This class loader uses the parent class loader for + * java.* and javax.* classes. + * If this variable doDelegation + * is false, this class loader does not delegate those + * classes to the parent class loader. + * + *

The default value is true. + */ + public boolean doDelegation = true; + + /** + * Creates a new class loader. + */ + public Loader() { + this(null); + } + + /** + * Creates a new class loader. + * + * @param cp the source of class files. + */ + public Loader(ClassPool cp) { + init(cp); + } + + /** + * Creates a new class loader + * using the specified parent class loader for delegation. + * + * @param parent the parent class loader. + * @param cp the source of class files. + */ + public Loader(ClassLoader parent, ClassPool cp) { + super(parent); + init(cp); + } + + private void init(ClassPool cp) { + notDefinedHere = new Hashtable(); + notDefinedPackages = new Vector(); + source = cp; + translator = null; + domain = null; + delegateLoadingOf("javassist.Loader"); + } + + /** + * Records a class so that the loading of that class is delegated + * to the parent class loader. + * + *

If the given class name ends with . (dot), then + * that name is interpreted as a package name. All the classes + * in that package and the sub packages are delegated. + */ + public void delegateLoadingOf(String classname) { + if (classname.endsWith(".")) + notDefinedPackages.addElement(classname); + else + notDefinedHere.put(classname, this); + } + + /** + * Sets the protection domain for the classes handled by this class + * loader. Without registering an appropriate protection domain, + * the program loaded by this loader will not work with a security + * manager or a signed jar file. + */ + public void setDomain(ProtectionDomain d) { + domain = d; + } + + /** + * Sets the soruce ClassPool. + */ + public void setClassPool(ClassPool cp) { + source = cp; + } + + /** + * Adds a translator, which is called whenever a class is loaded. + * + * @param cp the ClassPool object for obtaining + * a class file. + * @param t a translator. + * @throws NotFoundException if t.start() throws an exception. + * @throws CannotCompileException if t.start() throws an exception. + */ + public void addTranslator(ClassPool cp, Translator t) + throws NotFoundException, CannotCompileException { + source = cp; + translator = t; + t.start(cp); + } + + /** + * Loads a class with an instance of Loader + * and calls main() of that class. + * + *

This method calls run(). + * + * @param args command line parameters. + *
  {@code args[0]} is the class name to be loaded. + *
  {@code args[1..n]} are parameters passed + * to the target {@code main()}. + * + * @see javassist.Loader#run(String[]) + */ + public static void main(String[] args) throws Throwable { + Loader cl = new Loader(); + cl.run(args); + } + + /** + * Loads a class and calls main() in that class. + * + * @param args command line parameters. + * + *
  {@code args[0]} is the class name to be loaded. + *
  {@code args[1..n]} are parameters passed + * to the target {@code main()}. + */ + public void run(String[] args) throws Throwable { + int n = args.length - 1; + if (n >= 0) { + String[] args2 = new String[n]; + for (int i = 0; i < n; ++i) + args2[i] = args[i + 1]; + + run(args[0], args2); + } + } + + /** + * Loads a class and calls main() in that class. + * + * @param classname the loaded class. + * @param args parameters passed to main(). + */ + public void run(String classname, String[] args) throws Throwable { + Class c = loadClass(classname); + try { + c.getDeclaredMethod("main", new Class[] { String[].class }).invoke( + null, + new Object[] { args }); + } + catch (java.lang.reflect.InvocationTargetException e) { + throw e.getTargetException(); + } + } + + /** + * Requests the class loader to load a class. + */ + protected Class loadClass(String name, boolean resolve) + throws ClassFormatError, ClassNotFoundException { + name = name.intern(); + synchronized (name) { + Class c = findLoadedClass(name); + if (c == null) + c = loadClassByDelegation(name); + + if (c == null) + c = findClass(name); + + if (c == null) + c = delegateToParent(name); + + if (resolve) + resolveClass(c); + + return c; + } + } + + /** + * Finds the specified class using ClassPath. + * If the source throws an exception, this returns null. + * + *

This method can be overridden by a subclass of + * Loader. Note that the overridden method must not throw + * an exception when it just fails to find a class file. + * + * @return null if the specified class could not be found. + * @throws ClassNotFoundException if an exception is thrown while + * obtaining a class file. + */ + protected Class findClass(String name) throws ClassNotFoundException { + byte[] classfile; + try { + if (source != null) { + if (translator != null) + translator.onLoad(source, name); + + try { + classfile = source.get(name).toBytecode(); + } + catch (NotFoundException e) { + return null; + } + } + else { + String jarname = "/" + name.replace('.', '/') + ".class"; + InputStream in = this.getClass().getResourceAsStream(jarname); + if (in == null) + return null; + + classfile = ClassPoolTail.readStream(in); + } + } + catch (Exception e) { + throw new ClassNotFoundException( + "caught an exception while obtaining a class file for " + + name, e); + } + + int i = name.lastIndexOf('.'); + if (i != -1) { + String pname = name.substring(0, i); + if (getPackage(pname) == null) + try { + definePackage( + pname, null, null, null, null, null, null, null); + } + catch (IllegalArgumentException e) { + // ignore. maybe the package object for the same + // name has been created just right away. + } + } + + if (domain == null) + return defineClass(name, classfile, 0, classfile.length); + else + return defineClass(name, classfile, 0, classfile.length, domain); + } + + protected Class loadClassByDelegation(String name) + throws ClassNotFoundException + { + /* The swing components must be loaded by a system + * class loader. + * javax.swing.UIManager loads a (concrete) subclass + * of LookAndFeel by a system class loader and cast + * an instance of the class to LookAndFeel for + * (maybe) a security reason. To avoid failure of + * type conversion, LookAndFeel must not be loaded + * by this class loader. + */ + + Class c = null; + if (doDelegation) + if (name.startsWith("java.") + || name.startsWith("javax.") + || name.startsWith("sun.") + || name.startsWith("com.sun.") + || name.startsWith("org.w3c.") + || name.startsWith("org.xml.") + || notDelegated(name)) + c = delegateToParent(name); + + return c; + } + + private boolean notDelegated(String name) { + if (notDefinedHere.get(name) != null) + return true; + + int n = notDefinedPackages.size(); + for (int i = 0; i < n; ++i) + if (name.startsWith((String)notDefinedPackages.elementAt(i))) + return true; + + return false; + } + + protected Class delegateToParent(String classname) + throws ClassNotFoundException + { + ClassLoader cl = getParent(); + if (cl != null) + return cl.loadClass(classname); + else + return findSystemClass(classname); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java b/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java new file mode 100644 index 0000000..e7c1029 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java @@ -0,0 +1,96 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.InputStream; +import java.net.URL; +import java.lang.ref.WeakReference; + +/** + * A class search-path representing a class loader. + * + *

It is used for obtaining a class file from the given + * class loader by getResourceAsStream(). + * The LoaderClassPath refers to the class loader through + * WeakReference. If the class loader is garbage collected, + * the other search pathes are examined. + * + *

The given class loader must have both getResourceAsStream() + * and getResource(). + * + * @author Bill Burke + * @author Shigeru Chiba + * + * @see ClassPool#insertClassPath(ClassPath) + * @see ClassPool#appendClassPath(ClassPath) + * @see ClassClassPath + */ +public class LoaderClassPath implements ClassPath { + private WeakReference clref; + + /** + * Creates a search path representing a class loader. + */ + public LoaderClassPath(ClassLoader cl) { + clref = new WeakReference(cl); + } + + public String toString() { + Object cl = null; + if (clref != null) + cl = clref.get(); + + return cl == null ? "" : cl.toString(); + } + + /** + * Obtains a class file from the class loader. + * This method calls getResourceAsStream(String) + * on the class loader. + */ + public InputStream openClassfile(String classname) { + String cname = classname.replace('.', '/') + ".class"; + ClassLoader cl = (ClassLoader)clref.get(); + if (cl == null) + return null; // not found + else + return cl.getResourceAsStream(cname); + } + + /** + * Obtains the URL of the specified class file. + * This method calls getResource(String) + * on the class loader. + * + * @return null if the class file could not be found. + */ + public URL find(String classname) { + String cname = classname.replace('.', '/') + ".class"; + ClassLoader cl = (ClassLoader)clref.get(); + if (cl == null) + return null; // not found + else + return cl.getResource(cname); + } + + /** + * Closes this class path. + */ + public void close() { + clref = null; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/Modifier.java b/src/main/java/com/wenshuo/agent/javassist/Modifier.java new file mode 100644 index 0000000..92f709c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/Modifier.java @@ -0,0 +1,219 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import com.wenshuo.agent.javassist.bytecode.AccessFlag; + +/** + * The Modifier class provides static methods and constants to decode + * class and member access modifiers. The constant values are equivalent + * to the corresponding values in javassist.bytecode.AccessFlag. + * + *

All the methods/constants in this class are compatible with + * ones in java.lang.reflect.Modifier. + * + * @see CtClass#getModifiers() + */ +public class Modifier { + public static final int PUBLIC = AccessFlag.PUBLIC; + public static final int PRIVATE = AccessFlag.PRIVATE; + public static final int PROTECTED = AccessFlag.PROTECTED; + public static final int STATIC = AccessFlag.STATIC; + public static final int FINAL = AccessFlag.FINAL; + public static final int SYNCHRONIZED = AccessFlag.SYNCHRONIZED; + public static final int VOLATILE = AccessFlag.VOLATILE; + public static final int VARARGS = AccessFlag.VARARGS; + public static final int TRANSIENT = AccessFlag.TRANSIENT; + public static final int NATIVE = AccessFlag.NATIVE; + public static final int INTERFACE = AccessFlag.INTERFACE; + public static final int ABSTRACT = AccessFlag.ABSTRACT; + public static final int STRICT = AccessFlag.STRICT; + public static final int ANNOTATION = AccessFlag.ANNOTATION; + public static final int ENUM = AccessFlag.ENUM; + + /** + * Returns true if the modifiers include the public + * modifier. + */ + public static boolean isPublic(int mod) { + return (mod & PUBLIC) != 0; + } + + /** + * Returns true if the modifiers include the private + * modifier. + */ + public static boolean isPrivate(int mod) { + return (mod & PRIVATE) != 0; + } + + /** + * Returns true if the modifiers include the protected + * modifier. + */ + public static boolean isProtected(int mod) { + return (mod & PROTECTED) != 0; + } + + /** + * Returns true if the modifiers do not include either + * public, protected, or private. + */ + public static boolean isPackage(int mod) { + return (mod & (PUBLIC | PRIVATE | PROTECTED)) == 0; + } + + /** + * Returns true if the modifiers include the static + * modifier. + */ + public static boolean isStatic(int mod) { + return (mod & STATIC) != 0; + } + + /** + * Returns true if the modifiers include the final + * modifier. + */ + public static boolean isFinal(int mod) { + return (mod & FINAL) != 0; + } + + /** + * Returns true if the modifiers include the synchronized + * modifier. + */ + public static boolean isSynchronized(int mod) { + return (mod & SYNCHRONIZED) != 0; + } + + /** + * Returns true if the modifiers include the volatile + * modifier. + */ + public static boolean isVolatile(int mod) { + return (mod & VOLATILE) != 0; + } + + /** + * Returns true if the modifiers include the transient + * modifier. + */ + public static boolean isTransient(int mod) { + return (mod & TRANSIENT) != 0; + } + + /** + * Returns true if the modifiers include the native + * modifier. + */ + public static boolean isNative(int mod) { + return (mod & NATIVE) != 0; + } + + /** + * Returns true if the modifiers include the interface + * modifier. + */ + public static boolean isInterface(int mod) { + return (mod & INTERFACE) != 0; + } + + /** + * Returns true if the modifiers include the annotation + * modifier. + * + * @since 3.2 + */ + public static boolean isAnnotation(int mod) { + return (mod & ANNOTATION) != 0; + } + + /** + * Returns true if the modifiers include the enum + * modifier. + * + * @since 3.2 + */ + public static boolean isEnum(int mod) { + return (mod & ENUM) != 0; + } + + /** + * Returns true if the modifiers include the abstract + * modifier. + */ + public static boolean isAbstract(int mod) { + return (mod & ABSTRACT) != 0; + } + + /** + * Returns true if the modifiers include the strictfp + * modifier. + */ + public static boolean isStrict(int mod) { + return (mod & STRICT) != 0; + } + + /** + * Truns the public bit on. The protected and private bits are + * cleared. + */ + public static int setPublic(int mod) { + return (mod & ~(PRIVATE | PROTECTED)) | PUBLIC; + } + + /** + * Truns the protected bit on. The protected and public bits are + * cleared. + */ + public static int setProtected(int mod) { + return (mod & ~(PRIVATE | PUBLIC)) | PROTECTED; + } + + /** + * Truns the private bit on. The protected and private bits are + * cleared. + */ + public static int setPrivate(int mod) { + return (mod & ~(PROTECTED | PUBLIC)) | PRIVATE; + } + + /** + * Clears the public, protected, and private bits. + */ + public static int setPackage(int mod) { + return (mod & ~(PROTECTED | PUBLIC | PRIVATE)); + } + + /** + * Clears a specified bit in mod. + */ + public static int clear(int mod, int clearBit) { + return mod & ~clearBit; + } + + /** + * Return a string describing the access modifier flags in + * the specified modifier. + * + * @param mod modifier flags. + */ + public static String toString(int mod) { + return java.lang.reflect.Modifier.toString(mod); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java b/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java new file mode 100644 index 0000000..5569375 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java @@ -0,0 +1,30 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +/** + * Signals that something could not be found. + */ +public class NotFoundException extends Exception { + public NotFoundException(String msg) { + super(msg); + } + + public NotFoundException(String msg, Exception e) { + super(msg + " because of " + e.toString()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java b/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java new file mode 100644 index 0000000..37f9add --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java @@ -0,0 +1,213 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.*; +import java.lang.reflect.Modifier; + +import com.wenshuo.agent.javassist.bytecode.*; +import java.util.*; +import java.security.*; + +/** + * Utility for calculating serialVersionUIDs for Serializable classes. + * + * @author Bob Lee (crazybob@crazybob.org) + * @author modified by Shigeru Chiba + */ +public class SerialVersionUID { + + /** + * Adds serialVersionUID if one does not already exist. Call this before + * modifying a class to maintain serialization compatability. + */ + public static void setSerialVersionUID(CtClass clazz) + throws CannotCompileException, NotFoundException + { + // check for pre-existing field. + try { + clazz.getDeclaredField("serialVersionUID"); + return; + } + catch (NotFoundException e) {} + + // check if the class is serializable. + if (!isSerializable(clazz)) + return; + + // add field with default value. + CtField field = new CtField(CtClass.longType, "serialVersionUID", + clazz); + field.setModifiers(Modifier.PRIVATE | Modifier.STATIC | + Modifier.FINAL); + clazz.addField(field, calculateDefault(clazz) + "L"); + } + + /** + * Does the class implement Serializable? + */ + private static boolean isSerializable(CtClass clazz) + throws NotFoundException + { + ClassPool pool = clazz.getClassPool(); + return clazz.subtypeOf(pool.get("java.io.Serializable")); + } + + /** + * Calculate default value. See Java Serialization Specification, Stream + * Unique Identifiers. + * + * @since 3.20 + */ + public static long calculateDefault(CtClass clazz) + throws CannotCompileException + { + try { + ByteArrayOutputStream bout = new ByteArrayOutputStream(); + DataOutputStream out = new DataOutputStream(bout); + ClassFile classFile = clazz.getClassFile(); + + // class name. + String javaName = javaName(clazz); + out.writeUTF(javaName); + + CtMethod[] methods = clazz.getDeclaredMethods(); + + // class modifiers. + int classMods = clazz.getModifiers(); + if ((classMods & Modifier.INTERFACE) != 0) + if (methods.length > 0) + classMods = classMods | Modifier.ABSTRACT; + else + classMods = classMods & ~Modifier.ABSTRACT; + + out.writeInt(classMods); + + // interfaces. + String[] interfaces = classFile.getInterfaces(); + for (int i = 0; i < interfaces.length; i++) + interfaces[i] = javaName(interfaces[i]); + + Arrays.sort(interfaces); + for (int i = 0; i < interfaces.length; i++) + out.writeUTF(interfaces[i]); + + // fields. + CtField[] fields = clazz.getDeclaredFields(); + Arrays.sort(fields, new Comparator() { + public int compare(Object o1, Object o2) { + CtField field1 = (CtField)o1; + CtField field2 = (CtField)o2; + return field1.getName().compareTo(field2.getName()); + } + }); + + for (int i = 0; i < fields.length; i++) { + CtField field = (CtField) fields[i]; + int mods = field.getModifiers(); + if (((mods & Modifier.PRIVATE) == 0) || + ((mods & (Modifier.STATIC | Modifier.TRANSIENT)) == 0)) { + out.writeUTF(field.getName()); + out.writeInt(mods); + out.writeUTF(field.getFieldInfo2().getDescriptor()); + } + } + + // static initializer. + if (classFile.getStaticInitializer() != null) { + out.writeUTF(""); + out.writeInt(Modifier.STATIC); + out.writeUTF("()V"); + } + + // constructors. + CtConstructor[] constructors = clazz.getDeclaredConstructors(); + Arrays.sort(constructors, new Comparator() { + public int compare(Object o1, Object o2) { + CtConstructor c1 = (CtConstructor)o1; + CtConstructor c2 = (CtConstructor)o2; + return c1.getMethodInfo2().getDescriptor().compareTo( + c2.getMethodInfo2().getDescriptor()); + } + }); + + for (int i = 0; i < constructors.length; i++) { + CtConstructor constructor = constructors[i]; + int mods = constructor.getModifiers(); + if ((mods & Modifier.PRIVATE) == 0) { + out.writeUTF(""); + out.writeInt(mods); + out.writeUTF(constructor.getMethodInfo2() + .getDescriptor().replace('/', '.')); + } + } + + // methods. + Arrays.sort(methods, new Comparator() { + public int compare(Object o1, Object o2) { + CtMethod m1 = (CtMethod)o1; + CtMethod m2 = (CtMethod)o2; + int value = m1.getName().compareTo(m2.getName()); + if (value == 0) + value = m1.getMethodInfo2().getDescriptor() + .compareTo(m2.getMethodInfo2().getDescriptor()); + + return value; + } + }); + + for (int i = 0; i < methods.length; i++) { + CtMethod method = methods[i]; + int mods = method.getModifiers() + & (Modifier.PUBLIC | Modifier.PRIVATE + | Modifier.PROTECTED | Modifier.STATIC + | Modifier.FINAL | Modifier.SYNCHRONIZED + | Modifier.NATIVE | Modifier.ABSTRACT | Modifier.STRICT); + if ((mods & Modifier.PRIVATE) == 0) { + out.writeUTF(method.getName()); + out.writeInt(mods); + out.writeUTF(method.getMethodInfo2() + .getDescriptor().replace('/', '.')); + } + } + + // calculate hash. + out.flush(); + MessageDigest digest = MessageDigest.getInstance("SHA"); + byte[] digested = digest.digest(bout.toByteArray()); + long hash = 0; + for (int i = Math.min(digested.length, 8) - 1; i >= 0; i--) + hash = (hash << 8) | (digested[i] & 0xFF); + + return hash; + } + catch (IOException e) { + throw new CannotCompileException(e); + } + catch (NoSuchAlgorithmException e) { + throw new CannotCompileException(e); + } + } + + private static String javaName(CtClass clazz) { + return Descriptor.toJavaName(Descriptor.toJvmName(clazz)); + } + + private static String javaName(String name) { + return Descriptor.toJavaName(Descriptor.toJvmName(name)); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/Translator.java b/src/main/java/com/wenshuo/agent/javassist/Translator.java new file mode 100644 index 0000000..1492f31 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/Translator.java @@ -0,0 +1,71 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +/** + * An observer of Loader. + * The users can define a class implementing this + * interface and attach an instance of that class to a + * Loader object so that it can translate a class file + * when the class file is loaded into the JVM. + * + * @see Loader#addTranslator(ClassPool, Translator) + */ +public interface Translator { + /** + * Is invoked by a Loader for initialization + * when the object is attached to the Loader object. + * This method can be used for getting (for caching) some + * CtClass objects that will be accessed + * in onLoad() in Translator. + * + * @param pool the ClassPool that this translator + * should use. + * @see Loader + * @throws NotFoundException if a CtClass cannot be found. + * @throws CannotCompileException if the initialization by this method + * fails. + */ + void start(ClassPool pool) + throws NotFoundException, CannotCompileException; + + /** + * Is invoked by a Loader for notifying that + * a class is loaded. The Loader calls + * + * 

+     * pool.get(classname).toBytecode()
+ * + * to read the class file after onLoad() returns. + * + *

classname may be the name of a class + * that has not been created yet. + * If so, onLoad() must create that class so that + * the Loader can read it after onLoad() + * returns. + * + * @param pool the ClassPool that this translator + * should use. + * @param classname the name of the class being loaded. + * @see Loader + * @throws NotFoundException if a CtClass cannot be found. + * @throws CannotCompileException if the code transformation + * by this method fails. + */ + void onLoad(ClassPool pool, String classname) + throws NotFoundException, CannotCompileException; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java b/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java new file mode 100644 index 0000000..a66b87a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java @@ -0,0 +1,179 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist; + +import java.io.*; +import java.net.*; + +/** + * A class search-path specified with URL (http). + * + * @see javassist.ClassPath + * @see ClassPool#insertClassPath(ClassPath) + * @see ClassPool#appendClassPath(ClassPath) + */ +public class URLClassPath implements ClassPath { + protected String hostname; + protected int port; + protected String directory; + protected String packageName; + + /** + * Creates a search path specified with URL (http). + * + *

This search path is used only if a requested + * class name starts with the name specified by packageName. + * If packageName is "org.javassist." and a requested class is + * "org.javassist.test.Main", then the given URL is used for loading that class. + * The URLClassPath obtains a class file from: + * + * 

http://www.javassist.org:80/java/classes/org/javassist/test/Main.class
+     *
+ * + *

Here, we assume that host is "www.javassist.org", + * port is 80, and directory is "/java/classes/". + * + *

If packageName is null, the URL is used + * for loading any class. + * + * @param host host name + * @param port port number + * @param directory directory name ending with "/". + * It can be "/" (root directory). + * It must start with "/". + * @param packageName package name. It must end with "." (dot). + */ + public URLClassPath(String host, int port, + String directory, String packageName) { + hostname = host; + this.port = port; + this.directory = directory; + this.packageName = packageName; + } + + public String toString() { + return hostname + ":" + port + directory; + } + + /** + * Opens a class file with http. + * + * @return null if the class file could not be found. + */ + public InputStream openClassfile(String classname) { + try { + URLConnection con = openClassfile0(classname); + if (con != null) + return con.getInputStream(); + } + catch (IOException e) {} + return null; // not found + } + + private URLConnection openClassfile0(String classname) throws IOException { + if (packageName == null || classname.startsWith(packageName)) { + String jarname + = directory + classname.replace('.', '/') + ".class"; + return fetchClass0(hostname, port, jarname); + } + else + return null; // not found + } + + /** + * Returns the URL. + * + * @return null if the class file could not be obtained. + */ + public URL find(String classname) { + try { + URLConnection con = openClassfile0(classname); + InputStream is = con.getInputStream(); + if (is != null) { + is.close(); + return con.getURL(); + } + } + catch (IOException e) {} + return null; + } + + /** + * Closes this class path. + */ + public void close() {} + + /** + * Reads a class file on an http server. + * + * @param host host name + * @param port port number + * @param directory directory name ending with "/". + * It can be "/" (root directory). + * It must start with "/". + * @param classname fully-qualified class name + */ + public static byte[] fetchClass(String host, int port, + String directory, String classname) + throws IOException + { + byte[] b; + URLConnection con = fetchClass0(host, port, + directory + classname.replace('.', '/') + ".class"); + int size = con.getContentLength(); + InputStream s = con.getInputStream(); + try { + if (size <= 0) + b = ClassPoolTail.readStream(s); + else { + b = new byte[size]; + int len = 0; + do { + int n = s.read(b, len, size - len); + if (n < 0) + throw new IOException("the stream was closed: " + + classname); + + len += n; + } while (len < size); + } + } + finally { + s.close(); + } + + return b; + } + + private static URLConnection fetchClass0(String host, int port, + String filename) + throws IOException + { + URL url; + try { + url = new URL("http", host, port, filename); + } + catch (MalformedURLException e) { + // should never reache here. + throw new IOException("invalid URL?"); + } + + URLConnection con = url.openConnection(); + con.connect(); + return con; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java new file mode 100644 index 0000000..e550e23 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java @@ -0,0 +1,134 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * A support class providing static methods and constants + * for access modifiers such as public, private, ... + */ +public class AccessFlag { + public static final int PUBLIC = 0x0001; + public static final int PRIVATE = 0x0002; + public static final int PROTECTED = 0x0004; + public static final int STATIC = 0x0008; + public static final int FINAL = 0x0010; + public static final int SYNCHRONIZED = 0x0020; + public static final int VOLATILE = 0x0040; + public static final int BRIDGE = 0x0040; // for method_info + public static final int TRANSIENT = 0x0080; + public static final int VARARGS = 0x0080; // for method_info + public static final int NATIVE = 0x0100; + public static final int INTERFACE = 0x0200; + public static final int ABSTRACT = 0x0400; + public static final int STRICT = 0x0800; + public static final int SYNTHETIC = 0x1000; + public static final int ANNOTATION = 0x2000; + public static final int ENUM = 0x4000; + public static final int MANDATED = 0x8000; + + public static final int SUPER = 0x0020; + + // Note: 0x0020 is assigned to both ACC_SUPER and ACC_SYNCHRONIZED + // although java.lang.reflect.Modifier does not recognize ACC_SUPER. + + /** + * Truns the public bit on. The protected and private bits are + * cleared. + */ + public static int setPublic(int accflags) { + return (accflags & ~(PRIVATE | PROTECTED)) | PUBLIC; + } + + /** + * Truns the protected bit on. The protected and public bits are + * cleared. + */ + public static int setProtected(int accflags) { + return (accflags & ~(PRIVATE | PUBLIC)) | PROTECTED; + } + + /** + * Truns the private bit on. The protected and private bits are + * cleared. + */ + public static int setPrivate(int accflags) { + return (accflags & ~(PROTECTED | PUBLIC)) | PRIVATE; + } + + /** + * Clears the public, protected, and private bits. + */ + public static int setPackage(int accflags) { + return (accflags & ~(PROTECTED | PUBLIC | PRIVATE)); + } + + /** + * Returns true if the access flags include the public bit. + */ + public static boolean isPublic(int accflags) { + return (accflags & PUBLIC) != 0; + } + + /** + * Returns true if the access flags include the protected bit. + */ + public static boolean isProtected(int accflags) { + return (accflags & PROTECTED) != 0; + } + + /** + * Returns true if the access flags include the private bit. + */ + public static boolean isPrivate(int accflags) { + return (accflags & PRIVATE) != 0; + } + + /** + * Returns true if the access flags include neither public, protected, + * or private. + */ + public static boolean isPackage(int accflags) { + return (accflags & (PROTECTED | PUBLIC | PRIVATE)) == 0; + } + + /** + * Clears a specified bit in accflags. + */ + public static int clear(int accflags, int clearBit) { + return accflags & ~clearBit; + } + + /** + * Converts a javassist.Modifier into + * a javassist.bytecode.AccessFlag. + * + * @param modifier javassist.Modifier + */ + public static int of(int modifier) { + return modifier; + } + + /** + * Converts a javassist.bytecode.AccessFlag + * into a javassist.Modifier. + * + * @param accflags javassist.bytecode.Accessflag + */ + public static int toModifier(int accflags) { + return accflags; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java new file mode 100644 index 0000000..4bbddf3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java @@ -0,0 +1,160 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.bytecode.annotation.AnnotationsWriter; +import com.wenshuo.agent.javassist.bytecode.annotation.MemberValue; + +import java.io.ByteArrayOutputStream; +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * A class representing AnnotationDefault_attribute. + * + *

For example, if you declare the following annotation type: + * + * 

+ * @interface Author {
+ *   String name() default "Shakespeare";
+ *   int age() default 99;
+ * }
+ *
+ * + *

The defautl values of name and age + * are stored as annotation default attributes in Author.class. + * The following code snippet obtains the default value of name: + * + * 

+ * ClassPool pool = ...
+ * CtClass cc = pool.get("Author");
+ * CtMethod cm = cc.getDeclaredMethod("age");
+ * MethodInfo minfo = cm.getMethodInfo();
+ * AnnotationDefaultAttribute ada
+ *         = (AnnotationDefaultAttribute)
+ *           minfo.getAttribute(AnnotationDefaultAttribute.tag);
+ * MemberValue value = ada.getDefaultValue());    // default value of age
+ *
+ * + *

If the following statement is executed after the code above, + * the default value of age is set to 80: + * + * 

+ * ada.setDefaultValue(new IntegerMemberValue(minfo.getConstPool(), 80));
+ *
+ * + * @see AnnotationsAttribute + * @see javassist.bytecode.annotation.MemberValue + */ + +public class AnnotationDefaultAttribute extends AttributeInfo { + /** + * The name of the AnnotationDefault attribute. + */ + public static final String tag = "AnnotationDefault"; + + /** + * Constructs an AnnotationDefault_attribute. + * + * @param cp constant pool + * @param info the contents of this attribute. It does not + * include attribute_name_index or + * attribute_length. + */ + public AnnotationDefaultAttribute(ConstPool cp, byte[] info) { + super(cp, tag, info); + } + + /** + * Constructs an empty AnnotationDefault_attribute. + * The default value can be set by setDefaultValue(). + * + * @param cp constant pool + * @see #setDefaultValue(javassist.bytecode.annotation.MemberValue) + */ + public AnnotationDefaultAttribute(ConstPool cp) { + this(cp, new byte[] { 0, 0 }); + } + + /** + * @param n the attribute name. + */ + AnnotationDefaultAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Copies this attribute and returns a new copy. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + AnnotationsAttribute.Copier copier + = new AnnotationsAttribute.Copier(info, constPool, newCp, classnames); + try { + copier.memberValue(0); + return new AnnotationDefaultAttribute(newCp, copier.close()); + } + catch (Exception e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Obtains the default value represented by this attribute. + */ + public MemberValue getDefaultValue() + { + try { + return new AnnotationsAttribute.Parser(info, constPool) + .parseMemberValue(); + } + catch (Exception e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Changes the default value represented by this attribute. + * + * @param value the new value. + * @see javassist.bytecode.annotation.Annotation#createMemberValue(ConstPool, CtClass) + */ + public void setDefaultValue(MemberValue value) { + ByteArrayOutputStream output = new ByteArrayOutputStream(); + AnnotationsWriter writer = new AnnotationsWriter(output, constPool); + try { + value.write(writer); + writer.close(); + } + catch (IOException e) { + throw new RuntimeException(e); // should never reach here. + } + + set(output.toByteArray()); + + } + + /** + * Returns a string representation of this object. + */ + public String toString() { + return getDefaultValue().toString(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java new file mode 100644 index 0000000..59fa6a4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java @@ -0,0 +1,732 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.util.Map; +import java.util.HashMap; +import java.io.IOException; +import java.io.DataInputStream; +import java.io.ByteArrayOutputStream; +import com.wenshuo.agent.javassist.bytecode.annotation.*; + +/** + * A class representing + * RuntimeVisibleAnnotations_attribute and + * RuntimeInvisibleAnnotations_attribute. + * + *

To obtain an AnnotationAttribute object, invoke + * getAttribute(AnnotationsAttribute.visibleTag) + * in ClassFile, MethodInfo, + * or FieldInfo. The obtained attribute is a + * runtime visible annotations attribute. + * If the parameter is + * AnnotationAttribute.invisibleTag, then the obtained + * attribute is a runtime invisible one. + * + *

For example, + * + * 

+ * import com.wenshuo.agent.javassist.bytecode.annotation.Annotation;
+ *    :
+ * CtMethod m = ... ;
+ * MethodInfo minfo = m.getMethodInfo();
+ * AnnotationsAttribute attr = (AnnotationsAttribute)
+ *         minfo.getAttribute(AnnotationsAttribute.invisibleTag);
+ * Annotation an = attr.getAnnotation("Author");
+ * String s = ((StringMemberValue)an.getMemberValue("name")).getValue();
+ * System.out.println("@Author(name=" + s + ")");
+ *
+ * + *

This code snippet retrieves an annotation of the type Author + * from the MethodInfo object specified by minfo. + * Then, it prints the value of name in Author. + * + *

If the annotation type Author is annotated by a meta annotation: + * + * 

+ * @Retention(RetentionPolicy.RUNTIME)
+ *
+ * + *

Then Author is visible at runtime. Therefore, the third + * statement of the code snippet above must be changed into: + * + * 

+ * AnnotationsAttribute attr = (AnnotationsAttribute)
+ *         minfo.getAttribute(AnnotationsAttribute.visibleTag);
+ *
+ * + *

The attribute tag must be visibleTag instead of + * invisibleTag. + * + *

If the member value of an annotation is not specified, the default value + * is used as that member value. If so, getMemberValue() in + * Annotation returns null + * since the default value is not included in the + * AnnotationsAttribute. It is included in the + * AnnotationDefaultAttribute of the method declared in the + * annotation type. + * + *

If you want to record a new AnnotationAttribute object, execute the + * following snippet: + * + * 

+ * ClassFile cf = ... ;
+ * ConstPool cp = cf.getConstPool();
+ * AnnotationsAttribute attr
+ *     = new AnnotationsAttribute(cp, AnnotationsAttribute.visibleTag);
+ * Annotation a = new Annotation("Author", cp);
+ * a.addMemberValue("name", new StringMemberValue("Chiba", cp));
+ * attr.setAnnotation(a);
+ * cf.addAttribute(attr);
+ * cf.setVersionToJava5();
+ *
+ * + *

The last statement is necessary if the class file was produced by + * javac of JDK 1.4 or earlier. Otherwise, it is not necessary. + * + * @see AnnotationDefaultAttribute + * @see javassist.bytecode.annotation.Annotation + */ +public class AnnotationsAttribute extends AttributeInfo { + /** + * The name of the RuntimeVisibleAnnotations attribute. + */ + public static final String visibleTag = "RuntimeVisibleAnnotations"; + + /** + * The name of the RuntimeInvisibleAnnotations attribute. + */ + public static final String invisibleTag = "RuntimeInvisibleAnnotations"; + + /** + * Constructs a Runtime(In)VisibleAnnotations_attribute. + * + * @param cp constant pool + * @param attrname attribute name (visibleTag or + * invisibleTag). + * @param info the contents of this attribute. It does not + * include attribute_name_index or + * attribute_length. + */ + public AnnotationsAttribute(ConstPool cp, String attrname, byte[] info) { + super(cp, attrname, info); + } + + /** + * Constructs an empty + * Runtime(In)VisibleAnnotations_attribute. + * A new annotation can be later added to the created attribute + * by setAnnotations(). + * + * @param cp constant pool + * @param attrname attribute name (visibleTag or + * invisibleTag). + * @see #setAnnotations(Annotation[]) + */ + public AnnotationsAttribute(ConstPool cp, String attrname) { + this(cp, attrname, new byte[] { 0, 0 }); + } + + /** + * @param n the attribute name. + */ + AnnotationsAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Returns num_annotations. + */ + public int numAnnotations() { + return ByteArray.readU16bit(info, 0); + } + + /** + * Copies this attribute and returns a new copy. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + Copier copier = new Copier(info, constPool, newCp, classnames); + try { + copier.annotationArray(); + return new AnnotationsAttribute(newCp, getName(), copier.close()); + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * Parses the annotations and returns a data structure representing + * the annotation with the specified type. See also + * getAnnotations() as to the returned data structure. + * + * @param type the annotation type. + * @return null if the specified annotation type is not included. + * @see #getAnnotations() + */ + public Annotation getAnnotation(String type) { + Annotation[] annotations = getAnnotations(); + for (int i = 0; i < annotations.length; i++) { + if (annotations[i].getTypeName().equals(type)) + return annotations[i]; + } + + return null; + } + + /** + * Adds an annotation. If there is an annotation with the same type, + * it is removed before the new annotation is added. + * + * @param annotation the added annotation. + */ + public void addAnnotation(Annotation annotation) { + String type = annotation.getTypeName(); + Annotation[] annotations = getAnnotations(); + for (int i = 0; i < annotations.length; i++) { + if (annotations[i].getTypeName().equals(type)) { + annotations[i] = annotation; + setAnnotations(annotations); + return; + } + } + + Annotation[] newlist = new Annotation[annotations.length + 1]; + System.arraycopy(annotations, 0, newlist, 0, annotations.length); + newlist[annotations.length] = annotation; + setAnnotations(newlist); + } + + /** + * Parses the annotations and returns a data structure representing + * that parsed annotations. Note that changes of the node values of the + * returned tree are not reflected on the annotations represented by + * this object unless the tree is copied back to this object by + * setAnnotations(). + * + * @see #setAnnotations(Annotation[]) + */ + public Annotation[] getAnnotations() { + try { + return new Parser(info, constPool).parseAnnotations(); + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * Changes the annotations represented by this object according to + * the given array of Annotation objects. + * + * @param annotations the data structure representing the + * new annotations. + */ + public void setAnnotations(Annotation[] annotations) { + ByteArrayOutputStream output = new ByteArrayOutputStream(); + AnnotationsWriter writer = new AnnotationsWriter(output, constPool); + try { + int n = annotations.length; + writer.numAnnotations(n); + for (int i = 0; i < n; ++i) + annotations[i].write(writer); + + writer.close(); + } + catch (IOException e) { + throw new RuntimeException(e); // should never reach here. + } + + set(output.toByteArray()); + } + + /** + * Changes the annotations. A call to this method is equivalent to: + * 

setAnnotations(new Annotation[] { annotation })
+ * + * @param annotation the data structure representing + * the new annotation. + */ + public void setAnnotation(Annotation annotation) { + setAnnotations(new Annotation[] { annotation }); + } + + /** + * @param oldname a JVM class name. + * @param newname a JVM class name. + */ + void renameClass(String oldname, String newname) { + HashMap map = new HashMap(); + map.put(oldname, newname); + renameClass(map); + } + + void renameClass(Map classnames) { + Renamer renamer = new Renamer(info, getConstPool(), classnames); + try { + renamer.annotationArray(); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + void getRefClasses(Map classnames) { renameClass(classnames); } + + /** + * Returns a string representation of this object. + */ + public String toString() { + Annotation[] a = getAnnotations(); + StringBuilder sbuf = new StringBuilder(); + int i = 0; + while (i < a.length) { + sbuf.append(a[i++].toString()); + if (i != a.length) + sbuf.append(", "); + } + + return sbuf.toString(); + } + + static class Walker { + byte[] info; + + Walker(byte[] attrInfo) { + info = attrInfo; + } + + final void parameters() throws Exception { + int numParam = info[0] & 0xff; + parameters(numParam, 1); + } + + void parameters(int numParam, int pos) throws Exception { + for (int i = 0; i < numParam; ++i) + pos = annotationArray(pos); + } + + final void annotationArray() throws Exception { + annotationArray(0); + } + + final int annotationArray(int pos) throws Exception { + int num = ByteArray.readU16bit(info, pos); + return annotationArray(pos + 2, num); + } + + int annotationArray(int pos, int num) throws Exception { + for (int i = 0; i < num; ++i) + pos = annotation(pos); + + return pos; + } + + final int annotation(int pos) throws Exception { + int type = ByteArray.readU16bit(info, pos); + int numPairs = ByteArray.readU16bit(info, pos + 2); + return annotation(pos + 4, type, numPairs); + } + + int annotation(int pos, int type, int numPairs) throws Exception { + for (int j = 0; j < numPairs; ++j) + pos = memberValuePair(pos); + + return pos; + } + + /** + * {@code element_value_paris} + */ + final int memberValuePair(int pos) throws Exception { + int nameIndex = ByteArray.readU16bit(info, pos); + return memberValuePair(pos + 2, nameIndex); + } + + /** + * {@code element_value_paris[]} + */ + int memberValuePair(int pos, int nameIndex) throws Exception { + return memberValue(pos); + } + + /** + * {@code element_value} + */ + final int memberValue(int pos) throws Exception { + int tag = info[pos] & 0xff; + if (tag == 'e') { + int typeNameIndex = ByteArray.readU16bit(info, pos + 1); + int constNameIndex = ByteArray.readU16bit(info, pos + 3); + enumMemberValue(pos, typeNameIndex, constNameIndex); + return pos + 5; + } + else if (tag == 'c') { + int index = ByteArray.readU16bit(info, pos + 1); + classMemberValue(pos, index); + return pos + 3; + } + else if (tag == '@') + return annotationMemberValue(pos + 1); + else if (tag == '[') { + int num = ByteArray.readU16bit(info, pos + 1); + return arrayMemberValue(pos + 3, num); + } + else { // primitive types or String. + int index = ByteArray.readU16bit(info, pos + 1); + constValueMember(tag, index); + return pos + 3; + } + } + + /** + * {@code const_value_index} + */ + void constValueMember(int tag, int index) throws Exception {} + + /** + * {@code enum_const_value} + */ + void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) + throws Exception { + } + + /** + * {@code class_info_index} + */ + void classMemberValue(int pos, int index) throws Exception {} + + /** + * {@code annotation_value} + */ + int annotationMemberValue(int pos) throws Exception { + return annotation(pos); + } + + /** + * {@code array_value} + */ + int arrayMemberValue(int pos, int num) throws Exception { + for (int i = 0; i < num; ++i) { + pos = memberValue(pos); + } + + return pos; + } + } + + static class Renamer extends Walker { + ConstPool cpool; + Map classnames; + + /** + * Constructs a renamer. It renames some class names + * into the new names specified by map. + * + * @param info the annotations attribute. + * @param cp the constant pool. + * @param map pairs of replaced and substituted class names. + * It can be null. + */ + Renamer(byte[] info, ConstPool cp, Map map) { + super(info); + cpool = cp; + classnames = map; + } + + int annotation(int pos, int type, int numPairs) throws Exception { + renameType(pos - 4, type); + return super.annotation(pos, type, numPairs); + } + + void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) + throws Exception + { + renameType(pos + 1, typeNameIndex); + super.enumMemberValue(pos, typeNameIndex, constNameIndex); + } + + void classMemberValue(int pos, int index) throws Exception { + renameType(pos + 1, index); + super.classMemberValue(pos, index); + } + + private void renameType(int pos, int index) { + String name = cpool.getUtf8Info(index); + String newName = Descriptor.rename(name, classnames); + if (!name.equals(newName)) { + int index2 = cpool.addUtf8Info(newName); + ByteArray.write16bit(index2, info, pos); + } + } + } + + static class Copier extends Walker { + ByteArrayOutputStream output; + AnnotationsWriter writer; + ConstPool srcPool, destPool; + Map classnames; + + /** + * Constructs a copier. This copier renames some class names + * into the new names specified by map when it copies + * an annotation attribute. + * + * @param info the source attribute. + * @param src the constant pool of the source class. + * @param dest the constant pool of the destination class. + * @param map pairs of replaced and substituted class names. + * It can be null. + */ + Copier(byte[] info, ConstPool src, ConstPool dest, Map map) { + this(info, src, dest, map, true); + } + + Copier(byte[] info, ConstPool src, ConstPool dest, Map map, boolean makeWriter) { + super(info); + output = new ByteArrayOutputStream(); + if (makeWriter) + writer = new AnnotationsWriter(output, dest); + + srcPool = src; + destPool = dest; + classnames = map; + } + + byte[] close() throws IOException { + writer.close(); + return output.toByteArray(); + } + + void parameters(int numParam, int pos) throws Exception { + writer.numParameters(numParam); + super.parameters(numParam, pos); + } + + int annotationArray(int pos, int num) throws Exception { + writer.numAnnotations(num); + return super.annotationArray(pos, num); + } + + int annotation(int pos, int type, int numPairs) throws Exception { + writer.annotation(copyType(type), numPairs); + return super.annotation(pos, type, numPairs); + } + + int memberValuePair(int pos, int nameIndex) throws Exception { + writer.memberValuePair(copy(nameIndex)); + return super.memberValuePair(pos, nameIndex); + } + + void constValueMember(int tag, int index) throws Exception { + writer.constValueIndex(tag, copy(index)); + super.constValueMember(tag, index); + } + + void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) + throws Exception + { + writer.enumConstValue(copyType(typeNameIndex), copy(constNameIndex)); + super.enumMemberValue(pos, typeNameIndex, constNameIndex); + } + + void classMemberValue(int pos, int index) throws Exception { + writer.classInfoIndex(copyType(index)); + super.classMemberValue(pos, index); + } + + int annotationMemberValue(int pos) throws Exception { + writer.annotationValue(); + return super.annotationMemberValue(pos); + } + + int arrayMemberValue(int pos, int num) throws Exception { + writer.arrayValue(num); + return super.arrayMemberValue(pos, num); + } + + /** + * Copies a constant pool entry into the destination constant pool + * and returns the index of the copied entry. + * + * @param srcIndex the index of the copied entry into the source + * constant pool. + * @return the index of the copied item into the destination + * constant pool. + */ + int copy(int srcIndex) { + return srcPool.copy(srcIndex, destPool, classnames); + } + + /** + * Copies a constant pool entry into the destination constant pool + * and returns the index of the copied entry. That entry must be + * a Utf8Info representing a class name in the L; form. + * + * @param srcIndex the index of the copied entry into the source + * constant pool. + * @return the index of the copied item into the destination + * constant pool. + */ + int copyType(int srcIndex) { + String name = srcPool.getUtf8Info(srcIndex); + String newName = Descriptor.rename(name, classnames); + return destPool.addUtf8Info(newName); + } + } + + static class Parser extends Walker { + ConstPool pool; + Annotation[][] allParams; // all parameters + Annotation[] allAnno; // all annotations + Annotation currentAnno; // current annotation + MemberValue currentMember; // current member + + /** + * Constructs a parser. This parser constructs a parse tree of + * the annotations. + * + * @param info the attribute. + * @param src the constant pool. + */ + Parser(byte[] info, ConstPool cp) { + super(info); + pool = cp; + } + + Annotation[][] parseParameters() throws Exception { + parameters(); + return allParams; + } + + Annotation[] parseAnnotations() throws Exception { + annotationArray(); + return allAnno; + } + + MemberValue parseMemberValue() throws Exception { + memberValue(0); + return currentMember; + } + + void parameters(int numParam, int pos) throws Exception { + Annotation[][] params = new Annotation[numParam][]; + for (int i = 0; i < numParam; ++i) { + pos = annotationArray(pos); + params[i] = allAnno; + } + + allParams = params; + } + + int annotationArray(int pos, int num) throws Exception { + Annotation[] array = new Annotation[num]; + for (int i = 0; i < num; ++i) { + pos = annotation(pos); + array[i] = currentAnno; + } + + allAnno = array; + return pos; + } + + int annotation(int pos, int type, int numPairs) throws Exception { + currentAnno = new Annotation(type, pool); + return super.annotation(pos, type, numPairs); + } + + int memberValuePair(int pos, int nameIndex) throws Exception { + pos = super.memberValuePair(pos, nameIndex); + currentAnno.addMemberValue(nameIndex, currentMember); + return pos; + } + + void constValueMember(int tag, int index) throws Exception { + MemberValue m; + ConstPool cp = pool; + switch (tag) { + case 'B' : + m = new ByteMemberValue(index, cp); + break; + case 'C' : + m = new CharMemberValue(index, cp); + break; + case 'D' : + m = new DoubleMemberValue(index, cp); + break; + case 'F' : + m = new FloatMemberValue(index, cp); + break; + case 'I' : + m = new IntegerMemberValue(index, cp); + break; + case 'J' : + m = new LongMemberValue(index, cp); + break; + case 'S' : + m = new ShortMemberValue(index, cp); + break; + case 'Z' : + m = new BooleanMemberValue(index, cp); + break; + case 's' : + m = new StringMemberValue(index, cp); + break; + default : + throw new RuntimeException("unknown tag:" + tag); + } + + currentMember = m; + super.constValueMember(tag, index); + } + + void enumMemberValue(int pos, int typeNameIndex, int constNameIndex) + throws Exception + { + currentMember = new EnumMemberValue(typeNameIndex, + constNameIndex, pool); + super.enumMemberValue(pos, typeNameIndex, constNameIndex); + } + + void classMemberValue(int pos, int index) throws Exception { + currentMember = new ClassMemberValue(index, pool); + super.classMemberValue(pos, index); + } + + int annotationMemberValue(int pos) throws Exception { + Annotation anno = currentAnno; + pos = super.annotationMemberValue(pos); + currentMember = new AnnotationMemberValue(currentAnno, pool); + currentAnno = anno; + return pos; + } + + int arrayMemberValue(int pos, int num) throws Exception { + ArrayMemberValue amv = new ArrayMemberValue(pool); + MemberValue[] elements = new MemberValue[num]; + for (int i = 0; i < num; ++i) { + pos = memberValue(pos); + elements[i] = currentMember; + } + + amv.setValue(elements); + currentMember = amv; + return pos; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java new file mode 100644 index 0000000..b8f799a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java @@ -0,0 +1,303 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.Map; +import java.util.ArrayList; +import java.util.ListIterator; +import java.util.List; +import java.util.Iterator; + +// Note: if you define a new subclass of AttributeInfo, then +// update AttributeInfo.read(), .copy(), and (maybe) write(). + +/** + * attribute_info structure. + */ +public class AttributeInfo { + protected ConstPool constPool; + int name; + byte[] info; + + protected AttributeInfo(ConstPool cp, int attrname, byte[] attrinfo) { + constPool = cp; + name = attrname; + info = attrinfo; + } + + protected AttributeInfo(ConstPool cp, String attrname) { + this(cp, attrname, (byte[])null); + } + + /** + * Constructs an attribute_info structure. + * + * @param cp constant pool table + * @param attrname attribute name + * @param attrinfo info field + * of attribute_info structure. + */ + public AttributeInfo(ConstPool cp, String attrname, byte[] attrinfo) { + this(cp, cp.addUtf8Info(attrname), attrinfo); + } + + protected AttributeInfo(ConstPool cp, int n, DataInputStream in) + throws IOException + { + constPool = cp; + name = n; + int len = in.readInt(); + info = new byte[len]; + if (len > 0) + in.readFully(info); + } + + static AttributeInfo read(ConstPool cp, DataInputStream in) + throws IOException + { + int name = in.readUnsignedShort(); + String nameStr = cp.getUtf8Info(name); + char first = nameStr.charAt(0); + if (first < 'M') { + if (first < 'E') { + if (nameStr.equals(AnnotationDefaultAttribute.tag)) + return new AnnotationDefaultAttribute(cp, name, in); + else if (nameStr.equals(BootstrapMethodsAttribute.tag)) + return new BootstrapMethodsAttribute(cp, name, in); + else if (nameStr.equals(CodeAttribute.tag)) + return new CodeAttribute(cp, name, in); + else if (nameStr.equals(ConstantAttribute.tag)) + return new ConstantAttribute(cp, name, in); + else if (nameStr.equals(DeprecatedAttribute.tag)) + return new DeprecatedAttribute(cp, name, in); + } + else { + if (nameStr.equals(EnclosingMethodAttribute.tag)) + return new EnclosingMethodAttribute(cp, name, in); + else if (nameStr.equals(ExceptionsAttribute.tag)) + return new ExceptionsAttribute(cp, name, in); + else if (nameStr.equals(InnerClassesAttribute.tag)) + return new InnerClassesAttribute(cp, name, in); + else if (nameStr.equals(LineNumberAttribute.tag)) + return new LineNumberAttribute(cp, name, in); + else if (nameStr.equals(LocalVariableAttribute.tag)) + return new LocalVariableAttribute(cp, name, in); + else if (nameStr.equals(LocalVariableTypeAttribute.tag)) + return new LocalVariableTypeAttribute(cp, name, in); + } + } + else { + if (first < 'S') { + /* Note that the names of Annotations attributes begin with 'R'. + */ + if (nameStr.equals(MethodParametersAttribute.tag)) + return new MethodParametersAttribute(cp, name, in); + else if (nameStr.equals(AnnotationsAttribute.visibleTag) + || nameStr.equals(AnnotationsAttribute.invisibleTag)) { + // RuntimeVisibleAnnotations or RuntimeInvisibleAnnotations + return new AnnotationsAttribute(cp, name, in); + } + else if (nameStr.equals(ParameterAnnotationsAttribute.visibleTag) + || nameStr.equals(ParameterAnnotationsAttribute.invisibleTag)) + return new ParameterAnnotationsAttribute(cp, name, in); + else if (nameStr.equals(TypeAnnotationsAttribute.visibleTag) + || nameStr.equals(TypeAnnotationsAttribute.invisibleTag)) + return new TypeAnnotationsAttribute(cp, name, in); + } + else { + if (nameStr.equals(SignatureAttribute.tag)) + return new SignatureAttribute(cp, name, in); + else if (nameStr.equals(SourceFileAttribute.tag)) + return new SourceFileAttribute(cp, name, in); + else if (nameStr.equals(SyntheticAttribute.tag)) + return new SyntheticAttribute(cp, name, in); + else if (nameStr.equals(StackMap.tag)) + return new StackMap(cp, name, in); + else if (nameStr.equals(StackMapTable.tag)) + return new StackMapTable(cp, name, in); + } + } + + return new AttributeInfo(cp, name, in); + } + + /** + * Returns an attribute name. + */ + public String getName() { + return constPool.getUtf8Info(name); + } + + /** + * Returns a constant pool table. + */ + public ConstPool getConstPool() { return constPool; } + + /** + * Returns the length of this attribute_info + * structure. + * The returned value is attribute_length + 6. + */ + public int length() { + return info.length + 6; + } + + /** + * Returns the info field + * of this attribute_info structure. + * + *

This method is not available if the object is an instance + * of CodeAttribute. + */ + public byte[] get() { return info; } + + /** + * Sets the info field + * of this attribute_info structure. + * + *

This method is not available if the object is an instance + * of CodeAttribute. + */ + public void set(byte[] newinfo) { info = newinfo; } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + int s = info.length; + byte[] srcInfo = info; + byte[] newInfo = new byte[s]; + for (int i = 0; i < s; ++i) + newInfo[i] = srcInfo[i]; + + return new AttributeInfo(newCp, getName(), newInfo); + } + + void write(DataOutputStream out) throws IOException { + out.writeShort(name); + out.writeInt(info.length); + if (info.length > 0) + out.write(info); + } + + static int getLength(ArrayList list) { + int size = 0; + int n = list.size(); + for (int i = 0; i < n; ++i) { + AttributeInfo attr = (AttributeInfo)list.get(i); + size += attr.length(); + } + + return size; + } + + static AttributeInfo lookup(ArrayList list, String name) { + if (list == null) + return null; + + ListIterator iterator = list.listIterator(); + while (iterator.hasNext()) { + AttributeInfo ai = (AttributeInfo)iterator.next(); + if (ai.getName().equals(name)) + return ai; + } + + return null; // no such attribute + } + + static synchronized void remove(ArrayList list, String name) { + if (list == null) + return; + + ListIterator iterator = list.listIterator(); + while (iterator.hasNext()) { + AttributeInfo ai = (AttributeInfo)iterator.next(); + if (ai.getName().equals(name)) + iterator.remove(); + } + } + + static void writeAll(ArrayList list, DataOutputStream out) + throws IOException + { + if (list == null) + return; + + int n = list.size(); + for (int i = 0; i < n; ++i) { + AttributeInfo attr = (AttributeInfo)list.get(i); + attr.write(out); + } + } + + static ArrayList copyAll(ArrayList list, ConstPool cp) { + if (list == null) + return null; + + ArrayList newList = new ArrayList(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + AttributeInfo attr = (AttributeInfo)list.get(i); + newList.add(attr.copy(cp, null)); + } + + return newList; + } + + /* The following two methods are used to implement + * ClassFile.renameClass(). + * Only CodeAttribute, LocalVariableAttribute, + * AnnotationsAttribute, and SignatureAttribute + * override these methods. + */ + void renameClass(String oldname, String newname) {} + void renameClass(Map classnames) {} + + static void renameClass(List attributes, String oldname, String newname) { + Iterator iterator = attributes.iterator(); + while (iterator.hasNext()) { + AttributeInfo ai = (AttributeInfo)iterator.next(); + ai.renameClass(oldname, newname); + } + } + + static void renameClass(List attributes, Map classnames) { + Iterator iterator = attributes.iterator(); + while (iterator.hasNext()) { + AttributeInfo ai = (AttributeInfo)iterator.next(); + ai.renameClass(classnames); + } + } + + void getRefClasses(Map classnames) {} + + static void getRefClasses(List attributes, Map classnames) { + Iterator iterator = attributes.iterator(); + while (iterator.hasNext()) { + AttributeInfo ai = (AttributeInfo)iterator.next(); + ai.getRefClasses(classnames); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java new file mode 100644 index 0000000..6aeafc7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java @@ -0,0 +1,40 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * Signals that a bad bytecode sequence has been found. + */ +public class BadBytecode extends Exception { + public BadBytecode(int opcode) { + super("bytecode " + opcode); + } + + public BadBytecode(String msg) { + super(msg); + } + + public BadBytecode(String msg, Throwable cause) { + super(msg, cause); + } + + public BadBytecode(MethodInfo minfo, Throwable cause) { + super(minfo.toString() + " in " + + minfo.getConstPool().getClassName() + + ": " + cause.getMessage(), cause); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java new file mode 100644 index 0000000..194c431 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java @@ -0,0 +1,123 @@ +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +public class BootstrapMethodsAttribute extends AttributeInfo { + /** + * The name of this attribute "BootstrapMethods". + */ + public static final String tag = "BootstrapMethods"; + + /** + * An element of bootstrap_methods. + */ + public static class BootstrapMethod { + /** + * Constructs an element of bootstrap_methods. + * + * @param method bootstrap_method_ref. + * @param args bootstrap_arguments. + */ + public BootstrapMethod(int method, int[] args) { + methodRef = method; + arguments = args; + } + + /** + * bootstrap_method_ref. + * The value at this index must be a CONSTANT_MethodHandle_info. + */ + public int methodRef; + + /** + * bootstrap_arguments. + */ + public int[] arguments; + } + + BootstrapMethodsAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a BootstrapMethods attribute. + * + * @param cp a constant pool table. + * @param methods the contents. + */ + public BootstrapMethodsAttribute(ConstPool cp, BootstrapMethod[] methods) { + super(cp, tag); + int size = 2; + for (int i = 0; i < methods.length; i++) + size += 4 + methods[i].arguments.length * 2; + + byte[] data = new byte[size]; + ByteArray.write16bit(methods.length, data, 0); // num_bootstrap_methods + int pos = 2; + for (int i = 0; i < methods.length; i++) { + ByteArray.write16bit(methods[i].methodRef, data, pos); + ByteArray.write16bit(methods[i].arguments.length, data, pos + 2); + int[] args = methods[i].arguments; + pos += 4; + for (int k = 0; k < args.length; k++) { + ByteArray.write16bit(args[k], data, pos); + pos += 2; + } + } + + set(data); + } + + /** + * Obtains bootstrap_methods in this attribute. + * + * @return an array of BootstrapMethod. Since it + * is a fresh copy, modifying the returned array does not + * affect the original contents of this attribute. + */ + public BootstrapMethod[] getMethods() { + byte[] data = this.get(); + int num = ByteArray.readU16bit(data, 0); + BootstrapMethod[] methods = new BootstrapMethod[num]; + int pos = 2; + for (int i = 0; i < num; i++) { + int ref = ByteArray.readU16bit(data, pos); + int len = ByteArray.readU16bit(data, pos + 2); + int[] args = new int[len]; + pos += 4; + for (int k = 0; k < len; k++) { + args[k] = ByteArray.readU16bit(data, pos); + pos += 2; + } + + methods[i] = new BootstrapMethod(ref, args); + } + + return methods; + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + BootstrapMethod[] methods = getMethods(); + ConstPool thisCp = getConstPool(); + for (int i = 0; i < methods.length; i++) { + BootstrapMethod m = methods[i]; + m.methodRef = thisCp.copy(m.methodRef, newCp, classnames); + for (int k = 0; k < m.arguments.length; k++) + m.arguments[k] = thisCp.copy(m.arguments[k], newCp, classnames); + } + + return new BootstrapMethodsAttribute(newCp, methods); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java new file mode 100644 index 0000000..ad8fc3f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java @@ -0,0 +1,77 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * A collection of static methods for reading and writing a byte array. + */ +public class ByteArray { + /** + * Reads an unsigned 16bit integer at the index. + */ + public static int readU16bit(byte[] code, int index) { + return ((code[index] & 0xff) << 8) | (code[index + 1] & 0xff); + } + + /** + * Reads a signed 16bit integer at the index. + */ + public static int readS16bit(byte[] code, int index) { + return (code[index] << 8) | (code[index + 1] & 0xff); + } + + /** + * Writes a 16bit integer at the index. + */ + public static void write16bit(int value, byte[] code, int index) { + code[index] = (byte)(value >>> 8); + code[index + 1] = (byte)value; + } + + /** + * Reads a 32bit integer at the index. + */ + public static int read32bit(byte[] code, int index) { + return (code[index] << 24) | ((code[index + 1] & 0xff) << 16) + | ((code[index + 2] & 0xff) << 8) | (code[index + 3] & 0xff); + } + + /** + * Writes a 32bit integer at the index. + */ + public static void write32bit(int value, byte[] code, int index) { + code[index] = (byte)(value >>> 24); + code[index + 1] = (byte)(value >>> 16); + code[index + 2] = (byte)(value >>> 8); + code[index + 3] = (byte)value; + } + + /** + * Copies a 32bit integer. + * + * @param src the source byte array. + * @param isrc the index into the source byte array. + * @param dest the destination byte array. + * @param idest the index into the destination byte array. + */ + static void copy32bit(byte[] src, int isrc, byte[] dest, int idest) { + dest[idest] = src[isrc]; + dest[idest + 1] = src[isrc + 1]; + dest[idest + 2] = src[isrc + 2]; + dest[idest + 3] = src[isrc + 3]; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java new file mode 100644 index 0000000..7206ea7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java @@ -0,0 +1,194 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.OutputStream; +import java.io.IOException; + +final class ByteStream extends OutputStream { + private byte[] buf; + private int count; + + public ByteStream() { this(32); } + + public ByteStream(int size) { + buf = new byte[size]; + count = 0; + } + + public int getPos() { return count; } + public int size() { return count; } + + public void writeBlank(int len) { + enlarge(len); + count += len; + } + + public void write(byte[] data) { + write(data, 0, data.length); + } + + public void write(byte[] data, int off, int len) { + enlarge(len); + System.arraycopy(data, off, buf, count, len); + count += len; + } + + public void write(int b) { + enlarge(1); + int oldCount = count; + buf[oldCount] = (byte)b; + count = oldCount + 1; + } + + public void writeShort(int s) { + enlarge(2); + int oldCount = count; + buf[oldCount] = (byte)(s >>> 8); + buf[oldCount + 1] = (byte)s; + count = oldCount + 2; + } + + public void writeInt(int i) { + enlarge(4); + int oldCount = count; + buf[oldCount] = (byte)(i >>> 24); + buf[oldCount + 1] = (byte)(i >>> 16); + buf[oldCount + 2] = (byte)(i >>> 8); + buf[oldCount + 3] = (byte)i; + count = oldCount + 4; + } + + public void writeLong(long i) { + enlarge(8); + int oldCount = count; + buf[oldCount] = (byte)(i >>> 56); + buf[oldCount + 1] = (byte)(i >>> 48); + buf[oldCount + 2] = (byte)(i >>> 40); + buf[oldCount + 3] = (byte)(i >>> 32); + buf[oldCount + 4] = (byte)(i >>> 24); + buf[oldCount + 5] = (byte)(i >>> 16); + buf[oldCount + 6] = (byte)(i >>> 8); + buf[oldCount + 7] = (byte)i; + count = oldCount + 8; + } + + public void writeFloat(float v) { + writeInt(Float.floatToIntBits(v)); + } + + public void writeDouble(double v) { + writeLong(Double.doubleToLongBits(v)); + } + + public void writeUTF(String s) { + int sLen = s.length(); + int pos = count; + enlarge(sLen + 2); + + byte[] buffer = buf; + buffer[pos++] = (byte)(sLen >>> 8); + buffer[pos++] = (byte)sLen; + for (int i = 0; i < sLen; ++i) { + char c = s.charAt(i); + if (0x01 <= c && c <= 0x7f) + buffer[pos++] = (byte)c; + else { + writeUTF2(s, sLen, i); + return; + } + } + + count = pos; + } + + private void writeUTF2(String s, int sLen, int offset) { + int size = sLen; + for (int i = offset; i < sLen; i++) { + int c = s.charAt(i); + if (c > 0x7ff) + size += 2; // 3 bytes code + else if (c == 0 || c > 0x7f) + ++size; // 2 bytes code + } + + if (size > 65535) + throw new RuntimeException( + "encoded string too long: " + sLen + size + " bytes"); + + enlarge(size + 2); + int pos = count; + byte[] buffer = buf; + buffer[pos] = (byte)(size >>> 8); + buffer[pos + 1] = (byte)size; + pos += 2 + offset; + for (int j = offset; j < sLen; ++j) { + int c = s.charAt(j); + if (0x01 <= c && c <= 0x7f) + buffer[pos++] = (byte) c; + else if (c > 0x07ff) { + buffer[pos] = (byte)(0xe0 | ((c >> 12) & 0x0f)); + buffer[pos + 1] = (byte)(0x80 | ((c >> 6) & 0x3f)); + buffer[pos + 2] = (byte)(0x80 | (c & 0x3f)); + pos += 3; + } + else { + buffer[pos] = (byte)(0xc0 | ((c >> 6) & 0x1f)); + buffer[pos + 1] = (byte)(0x80 | (c & 0x3f)); + pos += 2; + } + } + + count = pos; + } + + public void write(int pos, int value) { + buf[pos] = (byte)value; + } + + public void writeShort(int pos, int value) { + buf[pos] = (byte)(value >>> 8); + buf[pos + 1] = (byte)value; + } + + public void writeInt(int pos, int value) { + buf[pos] = (byte)(value >>> 24); + buf[pos + 1] = (byte)(value >>> 16); + buf[pos + 2] = (byte)(value >>> 8); + buf[pos + 3] = (byte)value; + } + + public byte[] toByteArray() { + byte[] buf2 = new byte[count]; + System.arraycopy(buf, 0, buf2, 0, count); + return buf2; + } + + public void writeTo(OutputStream out) throws IOException { + out.write(buf, 0, count); + } + + public void enlarge(int delta) { + int newCount = count + delta; + if (newCount > buf.length) { + int newLen = buf.length << 1; + byte[] newBuf = new byte[newLen > newCount ? newLen : newCount]; + System.arraycopy(buf, 0, newBuf, 0, count); + buf = newBuf; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java new file mode 100644 index 0000000..e04a85f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java @@ -0,0 +1,1459 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtPrimitiveType; + +class ByteVector implements Cloneable { + private byte[] buffer; + private int size; + + public ByteVector() { + buffer = new byte[64]; + size = 0; + } + + public Object clone() throws CloneNotSupportedException { + ByteVector bv = (ByteVector)super.clone(); + bv.buffer = (byte[])buffer.clone(); + return bv; + } + + public final int getSize() { return size; } + + public final byte[] copy() { + byte[] b = new byte[size]; + System.arraycopy(buffer, 0, b, 0, size); + return b; + } + + public int read(int offset) { + if (offset < 0 || size <= offset) + throw new ArrayIndexOutOfBoundsException(offset); + + return buffer[offset]; + } + + public void write(int offset, int value) { + if (offset < 0 || size <= offset) + throw new ArrayIndexOutOfBoundsException(offset); + + buffer[offset] = (byte)value; + } + + public void add(int code) { + addGap(1); + buffer[size - 1] = (byte)code; + } + + public void add(int b1, int b2) { + addGap(2); + buffer[size - 2] = (byte)b1; + buffer[size - 1] = (byte)b2; + } + + public void add(int b1, int b2, int b3, int b4) { + addGap(4); + buffer[size - 4] = (byte)b1; + buffer[size - 3] = (byte)b2; + buffer[size - 2] = (byte)b3; + buffer[size - 1] = (byte)b4; + } + + public void addGap(int length) { + if (size + length > buffer.length) { + int newSize = size << 1; + if (newSize < size + length) + newSize = size + length; + + byte[] newBuf = new byte[newSize]; + System.arraycopy(buffer, 0, newBuf, 0, size); + buffer = newBuf; + } + + size += length; + } +} + +/** + * A utility class for producing a bytecode sequence. + * + *

A Bytecode object is an unbounded array + * containing bytecode. For example, + * + * 

+ * ConstPool cp = ...;    // constant pool table
+ * Bytecode b = new Bytecode(cp, 1, 0);
+ * b.addIconst(3);
+ * b.addReturn(CtClass.intType);
+ * CodeAttribute ca = b.toCodeAttribute();
+ * + *

This program produces a Code attribute including a bytecode + * sequence: + * + * 

+ * iconst_3
+ * ireturn
+ * + * @see ConstPool + * @see CodeAttribute + */ +public class Bytecode extends ByteVector implements Cloneable, Opcode { + /** + * Represents the CtClass file using the + * constant pool table given to this Bytecode object. + */ + public static final CtClass THIS = ConstPool.THIS; + + ConstPool constPool; + int maxStack, maxLocals; + ExceptionTable tryblocks; + private int stackDepth; + + /** + * Constructs a Bytecode object with an empty bytecode + * sequence. + * + *

The parameters stacksize and localvars + * specify initial values + * of max_stack and max_locals. + * They can be changed later. + * + * @param cp constant pool table. + * @param stacksize max_stack. + * @param localvars max_locals. + */ + public Bytecode(ConstPool cp, int stacksize, int localvars) { + constPool = cp; + maxStack = stacksize; + maxLocals = localvars; + tryblocks = new ExceptionTable(cp); + stackDepth = 0; + } + + /** + * Constructs a Bytecode object with an empty bytecode + * sequence. The initial values of max_stack and + * max_locals are zero. + * + * @param cp constant pool table. + * @see Bytecode#setMaxStack(int) + * @see Bytecode#setMaxLocals(int) + */ + public Bytecode(ConstPool cp) { + this(cp, 0, 0); + } + + /** + * Creates and returns a copy of this object. + * The constant pool object is shared between this object + * and the cloned object. + */ + public Object clone() { + try { + Bytecode bc = (Bytecode)super.clone(); + bc.tryblocks = (ExceptionTable)tryblocks.clone(); + return bc; + } + catch (CloneNotSupportedException cnse) { + throw new RuntimeException(cnse); + } + } + + /** + * Gets a constant pool table. + */ + public ConstPool getConstPool() { return constPool; } + + /** + * Returns exception_table. + */ + public ExceptionTable getExceptionTable() { return tryblocks; } + + /** + * Converts to a CodeAttribute. + */ + public CodeAttribute toCodeAttribute() { + return new CodeAttribute(constPool, maxStack, maxLocals, + get(), tryblocks); + } + + /** + * Returns the length of the bytecode sequence. + */ + public int length() { + return getSize(); + } + + /** + * Returns the produced bytecode sequence. + */ + public byte[] get() { + return copy(); + } + + /** + * Gets max_stack. + */ + public int getMaxStack() { return maxStack; } + + /** + * Sets max_stack. + * + *

This value may be automatically updated when an instruction + * is appended. A Bytecode object maintains the current + * stack depth whenever an instruction is added + * by addOpcode(). For example, if DUP is appended, + * the current stack depth is increased by one. If the new stack + * depth is more than max_stack, then it is assigned + * to max_stack. However, if branch instructions are + * appended, the current stack depth may not be correctly maintained. + * + * @see #addOpcode(int) + */ + public void setMaxStack(int size) { + maxStack = size; + } + + /** + * Gets max_locals. + */ + public int getMaxLocals() { return maxLocals; } + + /** + * Sets max_locals. + */ + public void setMaxLocals(int size) { + maxLocals = size; + } + + /** + * Sets max_locals. + * + *

This computes the number of local variables + * used to pass method parameters and sets max_locals + * to that number plus locals. + * + * @param isStatic true if params must be + * interpreted as parameters to a static method. + * @param params parameter types. + * @param locals the number of local variables excluding + * ones used to pass parameters. + */ + public void setMaxLocals(boolean isStatic, CtClass[] params, + int locals) { + if (!isStatic) + ++locals; + + if (params != null) { + CtClass doubleType = CtClass.doubleType; + CtClass longType = CtClass.longType; + int n = params.length; + for (int i = 0; i < n; ++i) { + CtClass type = params[i]; + if (type == doubleType || type == longType) + locals += 2; + else + ++locals; + } + } + + maxLocals = locals; + } + + /** + * Increments max_locals. + */ + public void incMaxLocals(int diff) { + maxLocals += diff; + } + + /** + * Adds a new entry of exception_table. + */ + public void addExceptionHandler(int start, int end, + int handler, CtClass type) { + addExceptionHandler(start, end, handler, + constPool.addClassInfo(type)); + } + + /** + * Adds a new entry of exception_table. + * + * @param type the fully-qualified name of a throwable class. + */ + public void addExceptionHandler(int start, int end, + int handler, String type) { + addExceptionHandler(start, end, handler, + constPool.addClassInfo(type)); + } + + /** + * Adds a new entry of exception_table. + */ + public void addExceptionHandler(int start, int end, + int handler, int type) { + tryblocks.add(start, end, handler, type); + } + + /** + * Returns the length of bytecode sequence + * that have been added so far. + */ + public int currentPc() { + return getSize(); + } + + /** + * Reads a signed 8bit value at the offset from the beginning of the + * bytecode sequence. + * + * @throws ArrayIndexOutOfBoundsException if offset is invalid. + */ + public int read(int offset) { + return super.read(offset); + } + + /** + * Reads a signed 16bit value at the offset from the beginning of the + * bytecode sequence. + */ + public int read16bit(int offset) { + int v1 = read(offset); + int v2 = read(offset + 1); + return (v1 << 8) + (v2 & 0xff); + } + + /** + * Reads a signed 32bit value at the offset from the beginning of the + * bytecode sequence. + */ + public int read32bit(int offset) { + int v1 = read16bit(offset); + int v2 = read16bit(offset + 2); + return (v1 << 16) + (v2 & 0xffff); + } + + /** + * Writes an 8bit value at the offset from the beginning of the + * bytecode sequence. + * + * @throws ArrayIndexOutOfBoundsException if offset is invalid. + */ + public void write(int offset, int value) { + super.write(offset, value); + } + + /** + * Writes an 16bit value at the offset from the beginning of the + * bytecode sequence. + */ + public void write16bit(int offset, int value) { + write(offset, value >> 8); + write(offset + 1, value); + } + + /** + * Writes an 32bit value at the offset from the beginning of the + * bytecode sequence. + */ + public void write32bit(int offset, int value) { + write16bit(offset, value >> 16); + write16bit(offset + 2, value); + } + + /** + * Appends an 8bit value to the end of the bytecode sequence. + */ + public void add(int code) { + super.add(code); + } + + /** + * Appends a 32bit value to the end of the bytecode sequence. + */ + public void add32bit(int value) { + add(value >> 24, value >> 16, value >> 8, value); + } + + /** + * Appends the length-byte gap to the end of the bytecode sequence. + * + * @param length the gap length in byte. + */ + public void addGap(int length) { + super.addGap(length); + } + + /** + * Appends an 8bit opcode to the end of the bytecode sequence. + * The current stack depth is updated. + * max_stack is updated if the current stack depth + * is the deepest so far. + * + *

Note: some instructions such as INVOKEVIRTUAL does not + * update the current stack depth since the increment depends + * on the method signature. + * growStack() must be explicitly called. + */ + public void addOpcode(int code) { + add(code); + growStack(STACK_GROW[code]); + } + + /** + * Increases the current stack depth. + * It also updates max_stack if the current stack depth + * is the deepest so far. + * + * @param diff the number added to the current stack depth. + */ + public void growStack(int diff) { + setStackDepth(stackDepth + diff); + } + + /** + * Returns the current stack depth. + */ + public int getStackDepth() { return stackDepth; } + + /** + * Sets the current stack depth. + * It also updates max_stack if the current stack depth + * is the deepest so far. + * + * @param depth new value. + */ + public void setStackDepth(int depth) { + stackDepth = depth; + if (stackDepth > maxStack) + maxStack = stackDepth; + } + + /** + * Appends a 16bit value to the end of the bytecode sequence. + * It never changes the current stack depth. + */ + public void addIndex(int index) { + add(index >> 8, index); + } + + /** + * Appends ALOAD or (WIDE) ALOAD_<n> + * + * @param n an index into the local variable array. + */ + public void addAload(int n) { + if (n < 4) + addOpcode(42 + n); // aload_ + else if (n < 0x100) { + addOpcode(ALOAD); // aload + add(n); + } + else { + addOpcode(WIDE); + addOpcode(ALOAD); + addIndex(n); + } + } + + /** + * Appends ASTORE or (WIDE) ASTORE_<n> + * + * @param n an index into the local variable array. + */ + public void addAstore(int n) { + if (n < 4) + addOpcode(75 + n); // astore_ + else if (n < 0x100) { + addOpcode(ASTORE); // astore + add(n); + } + else { + addOpcode(WIDE); + addOpcode(ASTORE); + addIndex(n); + } + } + + /** + * Appends ICONST or ICONST_<n> + * + * @param n the pushed integer constant. + */ + public void addIconst(int n) { + if (n < 6 && -2 < n) + addOpcode(3 + n); // iconst_ -1..5 + else if (n <= 127 && -128 <= n) { + addOpcode(16); // bipush + add(n); + } + else if (n <= 32767 && -32768 <= n) { + addOpcode(17); // sipush + add(n >> 8); + add(n); + } + else + addLdc(constPool.addIntegerInfo(n)); + } + + /** + * Appends an instruction for pushing zero or null on the stack. + * If the type is void, this method does not append any instruction. + * + * @param type the type of the zero value (or null). + */ + public void addConstZero(CtClass type) { + if (type.isPrimitive()) { + if (type == CtClass.longType) + addOpcode(LCONST_0); + else if (type == CtClass.floatType) + addOpcode(FCONST_0); + else if (type == CtClass.doubleType) + addOpcode(DCONST_0); + else if (type == CtClass.voidType) + throw new RuntimeException("void type?"); + else + addOpcode(ICONST_0); + } + else + addOpcode(ACONST_NULL); + } + + /** + * Appends ILOAD or (WIDE) ILOAD_<n> + * + * @param n an index into the local variable array. + */ + public void addIload(int n) { + if (n < 4) + addOpcode(26 + n); // iload_ + else if (n < 0x100) { + addOpcode(ILOAD); // iload + add(n); + } + else { + addOpcode(WIDE); + addOpcode(ILOAD); + addIndex(n); + } + } + + /** + * Appends ISTORE or (WIDE) ISTORE_<n> + * + * @param n an index into the local variable array. + */ + public void addIstore(int n) { + if (n < 4) + addOpcode(59 + n); // istore_ + else if (n < 0x100) { + addOpcode(ISTORE); // istore + add(n); + } + else { + addOpcode(WIDE); + addOpcode(ISTORE); + addIndex(n); + } + } + + /** + * Appends LCONST or LCONST_<n> + * + * @param n the pushed long integer constant. + */ + public void addLconst(long n) { + if (n == 0 || n == 1) + addOpcode(9 + (int)n); // lconst_ + else + addLdc2w(n); + } + + /** + * Appends LLOAD or (WIDE) LLOAD_<n> + * + * @param n an index into the local variable array. + */ + public void addLload(int n) { + if (n < 4) + addOpcode(30 + n); // lload_ + else if (n < 0x100) { + addOpcode(LLOAD); // lload + add(n); + } + else { + addOpcode(WIDE); + addOpcode(LLOAD); + addIndex(n); + } + } + + /** + * Appends LSTORE or LSTORE_<n> + * + * @param n an index into the local variable array. + */ + public void addLstore(int n) { + if (n < 4) + addOpcode(63 + n); // lstore_ + else if (n < 0x100) { + addOpcode(LSTORE); // lstore + add(n); + } + else { + addOpcode(WIDE); + addOpcode(LSTORE); + addIndex(n); + } + } + + /** + * Appends DCONST or DCONST_<n> + * + * @param d the pushed double constant. + */ + public void addDconst(double d) { + if (d == 0.0 || d == 1.0) + addOpcode(14 + (int)d); // dconst_ + else + addLdc2w(d); + } + + /** + * Appends DLOAD or (WIDE) DLOAD_<n> + * + * @param n an index into the local variable array. + */ + public void addDload(int n) { + if (n < 4) + addOpcode(38 + n); // dload_ + else if (n < 0x100) { + addOpcode(DLOAD); // dload + add(n); + } + else { + addOpcode(WIDE); + addOpcode(DLOAD); + addIndex(n); + } + } + + /** + * Appends DSTORE or (WIDE) DSTORE_<n> + * + * @param n an index into the local variable array. + */ + public void addDstore(int n) { + if (n < 4) + addOpcode(71 + n); // dstore_ + else if (n < 0x100) { + addOpcode(DSTORE); // dstore + add(n); + } + else { + addOpcode(WIDE); + addOpcode(DSTORE); + addIndex(n); + } + } + + /** + * Appends FCONST or FCONST_<n> + * + * @param f the pushed float constant. + */ + public void addFconst(float f) { + if (f == 0.0f || f == 1.0f || f == 2.0f) + addOpcode(11 + (int)f); // fconst_ + else + addLdc(constPool.addFloatInfo(f)); + } + + /** + * Appends FLOAD or (WIDE) FLOAD_<n> + * + * @param n an index into the local variable array. + */ + public void addFload(int n) { + if (n < 4) + addOpcode(34 + n); // fload_ + else if (n < 0x100) { + addOpcode(FLOAD); // fload + add(n); + } + else { + addOpcode(WIDE); + addOpcode(FLOAD); + addIndex(n); + } + } + + /** + * Appends FSTORE or FSTORE_<n> + * + * @param n an index into the local variable array. + */ + public void addFstore(int n) { + if (n < 4) + addOpcode(67 + n); // fstore_ + else if (n < 0x100) { + addOpcode(FSTORE); // fstore + add(n); + } + else { + addOpcode(WIDE); + addOpcode(FSTORE); + addIndex(n); + } + } + + /** + * Appends an instruction for loading a value from the + * local variable at the index n. + * + * @param n the index. + * @param type the type of the loaded value. + * @return the size of the value (1 or 2 word). + */ + public int addLoad(int n, CtClass type) { + if (type.isPrimitive()) { + if (type == CtClass.booleanType || type == CtClass.charType + || type == CtClass.byteType || type == CtClass.shortType + || type == CtClass.intType) + addIload(n); + else if (type == CtClass.longType) { + addLload(n); + return 2; + } + else if(type == CtClass.floatType) + addFload(n); + else if(type == CtClass.doubleType) { + addDload(n); + return 2; + } + else + throw new RuntimeException("void type?"); + } + else + addAload(n); + + return 1; + } + + /** + * Appends an instruction for storing a value into the + * local variable at the index n. + * + * @param n the index. + * @param type the type of the stored value. + * @return 2 if the type is long or double. Otherwise 1. + */ + public int addStore(int n, CtClass type) { + if (type.isPrimitive()) { + if (type == CtClass.booleanType || type == CtClass.charType + || type == CtClass.byteType || type == CtClass.shortType + || type == CtClass.intType) + addIstore(n); + else if (type == CtClass.longType) { + addLstore(n); + return 2; + } + else if (type == CtClass.floatType) + addFstore(n); + else if (type == CtClass.doubleType) { + addDstore(n); + return 2; + } + else + throw new RuntimeException("void type?"); + } + else + addAstore(n); + + return 1; + } + + /** + * Appends instructions for loading all the parameters onto the + * operand stack. + * + * @param offset the index of the first parameter. It is 0 + * if the method is static. Otherwise, it is 1. + */ + public int addLoadParameters(CtClass[] params, int offset) { + int stacksize = 0; + if (params != null) { + int n = params.length; + for (int i = 0; i < n; ++i) + stacksize += addLoad(stacksize + offset, params[i]); + } + + return stacksize; + } + + /** + * Appends CHECKCAST. + * + * @param c the type. + */ + public void addCheckcast(CtClass c) { + addOpcode(CHECKCAST); + addIndex(constPool.addClassInfo(c)); + } + + /** + * Appends CHECKCAST. + * + * @param classname a fully-qualified class name. + */ + public void addCheckcast(String classname) { + addOpcode(CHECKCAST); + addIndex(constPool.addClassInfo(classname)); + } + + /** + * Appends INSTANCEOF. + * + * @param classname the class name. + */ + public void addInstanceof(String classname) { + addOpcode(INSTANCEOF); + addIndex(constPool.addClassInfo(classname)); + } + + /** + * Appends GETFIELD. + * + * @param c the class. + * @param name the field name. + * @param type the descriptor of the field type. + * + * @see Descriptor#of(CtClass) + */ + public void addGetfield(CtClass c, String name, String type) { + add(GETFIELD); + int ci = constPool.addClassInfo(c); + addIndex(constPool.addFieldrefInfo(ci, name, type)); + growStack(Descriptor.dataSize(type) - 1); + } + + /** + * Appends GETFIELD. + * + * @param c the fully-qualified class name. + * @param name the field name. + * @param type the descriptor of the field type. + * + * @see Descriptor#of(CtClass) + */ + public void addGetfield(String c, String name, String type) { + add(GETFIELD); + int ci = constPool.addClassInfo(c); + addIndex(constPool.addFieldrefInfo(ci, name, type)); + growStack(Descriptor.dataSize(type) - 1); + } + + /** + * Appends GETSTATIC. + * + * @param c the class + * @param name the field name + * @param type the descriptor of the field type. + * + * @see Descriptor#of(CtClass) + */ + public void addGetstatic(CtClass c, String name, String type) { + add(GETSTATIC); + int ci = constPool.addClassInfo(c); + addIndex(constPool.addFieldrefInfo(ci, name, type)); + growStack(Descriptor.dataSize(type)); + } + + /** + * Appends GETSTATIC. + * + * @param c the fully-qualified class name + * @param name the field name + * @param type the descriptor of the field type. + * + * @see Descriptor#of(CtClass) + */ + public void addGetstatic(String c, String name, String type) { + add(GETSTATIC); + int ci = constPool.addClassInfo(c); + addIndex(constPool.addFieldrefInfo(ci, name, type)); + growStack(Descriptor.dataSize(type)); + } + + /** + * Appends INVOKESPECIAL. + * + * @param clazz the target class. + * @param name the method name. + * @param returnType the return type. + * @param paramTypes the parameter types. + */ + public void addInvokespecial(CtClass clazz, String name, + CtClass returnType, CtClass[] paramTypes) { + String desc = Descriptor.ofMethod(returnType, paramTypes); + addInvokespecial(clazz, name, desc); + } + + /** + * Appends INVOKESPECIAL. + * + * @param clazz the target class. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + * @see Descriptor#ofConstructor(CtClass[]) + */ + public void addInvokespecial(CtClass clazz, String name, String desc) { + boolean isInterface = clazz == null ? false : clazz.isInterface(); + addInvokespecial(isInterface, + constPool.addClassInfo(clazz), name, desc); + } + + /** + * Appends INVOKESPECIAL. The invoked method must not be a default + * method declared in an interface. + * + * @param clazz the fully-qualified class name. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + * @see Descriptor#ofConstructor(CtClass[]) + */ + public void addInvokespecial(String clazz, String name, String desc) { + addInvokespecial(false, constPool.addClassInfo(clazz), name, desc); + } + + /** + * Appends INVOKESPECIAL. The invoked method must not be a default + * method declared in an interface. + * + * @param clazz the index of CONSTANT_Class_info + * structure. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + * @see Descriptor#ofConstructor(CtClass[]) + */ + public void addInvokespecial(int clazz, String name, String desc) { + addInvokespecial(false, clazz, name, desc); + } + + /** + * Appends INVOKESPECIAL. + * + * @param isInterface true if the invoked method is a default method + * declared in an interface. + * @param clazz the index of CONSTANT_Class_info + * structure. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + * @see Descriptor#ofConstructor(CtClass[]) + */ + public void addInvokespecial(boolean isInterface, int clazz, String name, String desc) { + add(INVOKESPECIAL); + int index; + if (isInterface) + index = constPool.addInterfaceMethodrefInfo(clazz, name, desc); + else + index = constPool.addMethodrefInfo(clazz, name, desc); + + addIndex(index); + growStack(Descriptor.dataSize(desc) - 1); + } + + /** + * Appends INVOKESTATIC. + * + * @param clazz the target class. + * @param name the method name + * @param returnType the return type. + * @param paramTypes the parameter types. + */ + public void addInvokestatic(CtClass clazz, String name, + CtClass returnType, CtClass[] paramTypes) { + String desc = Descriptor.ofMethod(returnType, paramTypes); + addInvokestatic(clazz, name, desc); + } + + /** + * Appends INVOKESTATIC. + * + * @param clazz the target class. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokestatic(CtClass clazz, String name, String desc) { + addInvokestatic(constPool.addClassInfo(clazz), name, desc); + } + + /** + * Appends INVOKESTATIC. + * + * @param classname the fully-qualified class name. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokestatic(String classname, String name, String desc) { + addInvokestatic(constPool.addClassInfo(classname), name, desc); + } + + /** + * Appends INVOKESTATIC. + * + * @param clazz the index of CONSTANT_Class_info + * structure. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokestatic(int clazz, String name, String desc) { + add(INVOKESTATIC); + addIndex(constPool.addMethodrefInfo(clazz, name, desc)); + growStack(Descriptor.dataSize(desc)); + } + + /** + * Appends INVOKEVIRTUAL. + * + *

The specified method must not be an inherited method. + * It must be directly declared in the class specified + * in clazz. + * + * @param clazz the target class. + * @param name the method name + * @param returnType the return type. + * @param paramTypes the parameter types. + */ + public void addInvokevirtual(CtClass clazz, String name, + CtClass returnType, CtClass[] paramTypes) { + String desc = Descriptor.ofMethod(returnType, paramTypes); + addInvokevirtual(clazz, name, desc); + } + + /** + * Appends INVOKEVIRTUAL. + * + *

The specified method must not be an inherited method. + * It must be directly declared in the class specified + * in clazz. + * + * @param clazz the target class. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokevirtual(CtClass clazz, String name, String desc) { + addInvokevirtual(constPool.addClassInfo(clazz), name, desc); + } + + /** + * Appends INVOKEVIRTUAL. + * + *

The specified method must not be an inherited method. + * It must be directly declared in the class specified + * in classname. + * + * @param classname the fully-qualified class name. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokevirtual(String classname, String name, String desc) { + addInvokevirtual(constPool.addClassInfo(classname), name, desc); + } + + /** + * Appends INVOKEVIRTUAL. + * + *

The specified method must not be an inherited method. + * It must be directly declared in the class specified + * by clazz. + * + * @param clazz the index of CONSTANT_Class_info + * structure. + * @param name the method name + * @param desc the descriptor of the method signature. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokevirtual(int clazz, String name, String desc) { + add(INVOKEVIRTUAL); + addIndex(constPool.addMethodrefInfo(clazz, name, desc)); + growStack(Descriptor.dataSize(desc) - 1); + } + + /** + * Appends INVOKEINTERFACE. + * + * @param clazz the target class. + * @param name the method name + * @param returnType the return type. + * @param paramTypes the parameter types. + * @param count the count operand of the instruction. + */ + public void addInvokeinterface(CtClass clazz, String name, + CtClass returnType, CtClass[] paramTypes, + int count) { + String desc = Descriptor.ofMethod(returnType, paramTypes); + addInvokeinterface(clazz, name, desc, count); + } + + /** + * Appends INVOKEINTERFACE. + * + * @param clazz the target class. + * @param name the method name + * @param desc the descriptor of the method signature. + * @param count the count operand of the instruction. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokeinterface(CtClass clazz, String name, + String desc, int count) { + addInvokeinterface(constPool.addClassInfo(clazz), name, desc, + count); + } + + /** + * Appends INVOKEINTERFACE. + * + * @param classname the fully-qualified class name. + * @param name the method name + * @param desc the descriptor of the method signature. + * @param count the count operand of the instruction. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokeinterface(String classname, String name, + String desc, int count) { + addInvokeinterface(constPool.addClassInfo(classname), name, desc, + count); + } + + /** + * Appends INVOKEINTERFACE. + * + * @param clazz the index of CONSTANT_Class_info + * structure. + * @param name the method name + * @param desc the descriptor of the method signature. + * @param count the count operand of the instruction. + * + * @see Descriptor#ofMethod(CtClass,CtClass[]) + */ + public void addInvokeinterface(int clazz, String name, + String desc, int count) { + add(INVOKEINTERFACE); + addIndex(constPool.addInterfaceMethodrefInfo(clazz, name, desc)); + add(count); + add(0); + growStack(Descriptor.dataSize(desc) - 1); + } + + /** + * Appends INVOKEDYNAMIC. + * + * @param bootstrap an index into the bootstrap_methods array + * of the bootstrap method table. + * @param name the method name. + * @param desc the method descriptor. + * @see Descriptor#ofMethod(CtClass,CtClass[]) + * @since 3.17 + */ + public void addInvokedynamic(int bootstrap, String name, String desc) { + int nt = constPool.addNameAndTypeInfo(name, desc); + int dyn = constPool.addInvokeDynamicInfo(bootstrap, nt); + add(INVOKEDYNAMIC); + addIndex(dyn); + add(0, 0); + growStack(Descriptor.dataSize(desc)); // assume ConstPool#REF_invokeStatic + } + + /** + * Appends LDC or LDC_W. The pushed item is a String + * object. + * + * @param s the character string pushed by LDC or LDC_W. + */ + public void addLdc(String s) { + addLdc(constPool.addStringInfo(s)); + } + + /** + * Appends LDC or LDC_W. + * + * @param i index into the constant pool. + */ + public void addLdc(int i) { + if (i > 0xFF) { + addOpcode(LDC_W); + addIndex(i); + } + else { + addOpcode(LDC); + add(i); + } + } + + /** + * Appends LDC2_W. The pushed item is a long value. + */ + public void addLdc2w(long l) { + addOpcode(LDC2_W); + addIndex(constPool.addLongInfo(l)); + } + + /** + * Appends LDC2_W. The pushed item is a double value. + */ + public void addLdc2w(double d) { + addOpcode(LDC2_W); + addIndex(constPool.addDoubleInfo(d)); + } + + /** + * Appends NEW. + * + * @param clazz the class of the created instance. + */ + public void addNew(CtClass clazz) { + addOpcode(NEW); + addIndex(constPool.addClassInfo(clazz)); + } + + /** + * Appends NEW. + * + * @param classname the fully-qualified class name. + */ + public void addNew(String classname) { + addOpcode(NEW); + addIndex(constPool.addClassInfo(classname)); + } + + /** + * Appends ANEWARRAY. + * + * @param classname the qualified class name of the element type. + */ + public void addAnewarray(String classname) { + addOpcode(ANEWARRAY); + addIndex(constPool.addClassInfo(classname)); + } + + /** + * Appends ICONST and ANEWARRAY. + * + * @param clazz the elememnt type. + * @param length the array length. + */ + public void addAnewarray(CtClass clazz, int length) { + addIconst(length); + addOpcode(ANEWARRAY); + addIndex(constPool.addClassInfo(clazz)); + } + + /** + * Appends NEWARRAY for primitive types. + * + * @param atype T_BOOLEAN, T_CHAR, ... + * @see Opcode + */ + public void addNewarray(int atype, int length) { + addIconst(length); + addOpcode(NEWARRAY); + add(atype); + } + + /** + * Appends MULTINEWARRAY. + * + * @param clazz the array type. + * @param dimensions the sizes of all dimensions. + * @return the length of dimensions. + */ + public int addMultiNewarray(CtClass clazz, int[] dimensions) { + int len = dimensions.length; + for (int i = 0; i < len; ++i) + addIconst(dimensions[i]); + + growStack(len); + return addMultiNewarray(clazz, len); + } + + /** + * Appends MULTINEWARRAY. The size of every dimension must have been + * already pushed on the stack. + * + * @param clazz the array type. + * @param dim the number of the dimensions. + * @return the value of dim. + */ + public int addMultiNewarray(CtClass clazz, int dim) { + add(MULTIANEWARRAY); + addIndex(constPool.addClassInfo(clazz)); + add(dim); + growStack(1 - dim); + return dim; + } + + /** + * Appends MULTINEWARRAY. + * + * @param desc the type descriptor of the created array. + * @param dim dimensions. + * @return the value of dim. + */ + public int addMultiNewarray(String desc, int dim) { + add(MULTIANEWARRAY); + addIndex(constPool.addClassInfo(desc)); + add(dim); + growStack(1 - dim); + return dim; + } + + /** + * Appends PUTFIELD. + * + * @param c the target class. + * @param name the field name. + * @param desc the descriptor of the field type. + */ + public void addPutfield(CtClass c, String name, String desc) { + addPutfield0(c, null, name, desc); + } + + /** + * Appends PUTFIELD. + * + * @param classname the fully-qualified name of the target class. + * @param name the field name. + * @param desc the descriptor of the field type. + */ + public void addPutfield(String classname, String name, String desc) { + // if classnaem is null, the target class is THIS. + addPutfield0(null, classname, name, desc); + } + + private void addPutfield0(CtClass target, String classname, + String name, String desc) { + add(PUTFIELD); + // target is null if it represents THIS. + int ci = classname == null ? constPool.addClassInfo(target) + : constPool.addClassInfo(classname); + addIndex(constPool.addFieldrefInfo(ci, name, desc)); + growStack(-1 - Descriptor.dataSize(desc)); + } + + /** + * Appends PUTSTATIC. + * + * @param c the target class. + * @param name the field name. + * @param desc the descriptor of the field type. + */ + public void addPutstatic(CtClass c, String name, String desc) { + addPutstatic0(c, null, name, desc); + } + + /** + * Appends PUTSTATIC. + * + * @param classname the fully-qualified name of the target class. + * @param fieldName the field name. + * @param desc the descriptor of the field type. + */ + public void addPutstatic(String classname, String fieldName, String desc) { + // if classname is null, the target class is THIS. + addPutstatic0(null, classname, fieldName, desc); + } + + private void addPutstatic0(CtClass target, String classname, + String fieldName, String desc) { + add(PUTSTATIC); + // target is null if it represents THIS. + int ci = classname == null ? constPool.addClassInfo(target) + : constPool.addClassInfo(classname); + addIndex(constPool.addFieldrefInfo(ci, fieldName, desc)); + growStack(-Descriptor.dataSize(desc)); + } + + /** + * Appends ARETURN, IRETURN, .., or RETURN. + * + * @param type the return type. + */ + public void addReturn(CtClass type) { + if (type == null) + addOpcode(RETURN); + else if (type.isPrimitive()) { + CtPrimitiveType ptype = (CtPrimitiveType)type; + addOpcode(ptype.getReturnOp()); + } + else + addOpcode(ARETURN); + } + + /** + * Appends RET. + * + * @param var local variable + */ + public void addRet(int var) { + if (var < 0x100) { + addOpcode(RET); + add(var); + } + else { + addOpcode(WIDE); + addOpcode(RET); + addIndex(var); + } + } + + /** + * Appends instructions for executing + * java.lang.System.println(message). + * + * @param message printed message. + */ + public void addPrintln(String message) { + addGetstatic("java.lang.System", "err", "Ljava/io/PrintStream;"); + addLdc(message); + addInvokevirtual("java.io.PrintStream", + "println", "(Ljava/lang/String;)V"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java new file mode 100644 index 0000000..5a6a70c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java @@ -0,0 +1,932 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.ListIterator; +import java.util.Map; + +import com.wenshuo.agent.javassist.CannotCompileException; + +/** + * ClassFile represents a Java .class file, which + * consists of a constant pool, methods, fields, and attributes. + * + *

For example,

+ * 
+ * ClassFile cf = new ClassFile(false, "test.Foo", null);
+ * cf.setInterfaces(new String[] { "java.lang.Cloneable" });
+ *
+ * FieldInfo f = new FieldInfo(cf.getConstPool(), "width", "I");
+ * f.setAccessFlags(AccessFlag.PUBLIC);
+ * cf.addField(f);
+ *
+ * cf.write(new DataOutputStream(new FileOutputStream("Foo.class")));
+ *
+ *

This code generates a class file Foo.class for the following class:

+ * 
+ * package test;
+ * class Foo implements Cloneable {
+ *     public int width;
+ * }
+ *
+ * + * @see FieldInfo + * @see MethodInfo + * @see ClassFileWriter + * @see javassist.CtClass#getClassFile() + * @see javassist.ClassPool#makeClass(ClassFile) + */ +public final class ClassFile { + int major, minor; // version number + ConstPool constPool; + int thisClass; + int accessFlags; + int superClass; + int[] interfaces; + ArrayList fields; + ArrayList methods; + ArrayList attributes; + String thisclassname; // not JVM-internal name + String[] cachedInterfaces; + String cachedSuperclass; + + /** + * The major version number of class files + * for JDK 1.1. + */ + public static final int JAVA_1 = 45; + + /** + * The major version number of class files + * for JDK 1.2. + */ + public static final int JAVA_2 = 46; + + /** + * The major version number of class files + * for JDK 1.3. + */ + public static final int JAVA_3 = 47; + + /** + * The major version number of class files + * for JDK 1.4. + */ + public static final int JAVA_4 = 48; + + /** + * The major version number of class files + * for JDK 1.5. + */ + public static final int JAVA_5 = 49; + + /** + * The major version number of class files + * for JDK 1.6. + */ + public static final int JAVA_6 = 50; + + /** + * The major version number of class files + * for JDK 1.7. + */ + public static final int JAVA_7 = 51; + + /** + * The major version number of class files + * for JDK 1.8. + */ + public static final int JAVA_8 = 52; + + /** + * The major version number of class files created + * from scratch. The default value is 47 (JDK 1.3). + * It is 49 (JDK 1.5) + * if the JVM supports java.lang.StringBuilder. + * It is 50 (JDK 1.6) + * if the JVM supports java.util.zip.DeflaterInputStream. + * It is 51 (JDK 1.7) + * if the JVM supports java.lang.invoke.CallSite. + */ + public static int MAJOR_VERSION = JAVA_3; + + static { + try { + Class.forName("java.lang.StringBuilder"); + MAJOR_VERSION = JAVA_5; + Class.forName("java.util.zip.DeflaterInputStream"); + MAJOR_VERSION = JAVA_6; + Class.forName("java.lang.invoke.CallSite"); + MAJOR_VERSION = JAVA_7; + } + catch (Throwable t) {} + } + + /** + * Constructs a class file from a byte stream. + */ + public ClassFile(DataInputStream in) throws IOException { + read(in); + } + + /** + * Constructs a class file including no members. + * + * @param isInterface + * true if this is an interface. false if this is a class. + * @param classname + * a fully-qualified class name + * @param superclass + * a fully-qualified super class name or null. + */ + public ClassFile(boolean isInterface, String classname, String superclass) { + major = MAJOR_VERSION; + minor = 0; // JDK 1.3 or later + constPool = new ConstPool(classname); + thisClass = constPool.getThisClassInfo(); + if (isInterface) + accessFlags = AccessFlag.INTERFACE | AccessFlag.ABSTRACT; + else + accessFlags = AccessFlag.SUPER; + + initSuperclass(superclass); + interfaces = null; + fields = new ArrayList(); + methods = new ArrayList(); + thisclassname = classname; + + attributes = new ArrayList(); + attributes.add(new SourceFileAttribute(constPool, + getSourcefileName(thisclassname))); + } + + private void initSuperclass(String superclass) { + if (superclass != null) { + this.superClass = constPool.addClassInfo(superclass); + cachedSuperclass = superclass; + } + else { + this.superClass = constPool.addClassInfo("java.lang.Object"); + cachedSuperclass = "java.lang.Object"; + } + } + + private static String getSourcefileName(String qname) { + int index = qname.lastIndexOf('.'); + if (index >= 0) + qname = qname.substring(index + 1); + + return qname + ".java"; + } + + /** + * Eliminates dead constant pool items. If a method or a field is removed, + * the constant pool items used by that method/field become dead items. This + * method recreates a constant pool. + */ + public void compact() { + ConstPool cp = compact0(); + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + minfo.compact(cp); + } + + list = fields; + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + finfo.compact(cp); + } + + attributes = AttributeInfo.copyAll(attributes, cp); + constPool = cp; + } + + private ConstPool compact0() { + ConstPool cp = new ConstPool(thisclassname); + thisClass = cp.getThisClassInfo(); + String sc = getSuperclass(); + if (sc != null) + superClass = cp.addClassInfo(getSuperclass()); + + if (interfaces != null) { + int n = interfaces.length; + for (int i = 0; i < n; ++i) + interfaces[i] + = cp.addClassInfo(constPool.getClassInfo(interfaces[i])); + } + + return cp; + } + + /** + * Discards all attributes, associated with both the class file and the + * members such as a code attribute and exceptions attribute. The unused + * constant pool entries are also discarded (a new packed constant pool is + * constructed). + */ + public void prune() { + ConstPool cp = compact0(); + ArrayList newAttributes = new ArrayList(); + AttributeInfo invisibleAnnotations + = getAttribute(AnnotationsAttribute.invisibleTag); + if (invisibleAnnotations != null) { + invisibleAnnotations = invisibleAnnotations.copy(cp, null); + newAttributes.add(invisibleAnnotations); + } + + AttributeInfo visibleAnnotations + = getAttribute(AnnotationsAttribute.visibleTag); + if (visibleAnnotations != null) { + visibleAnnotations = visibleAnnotations.copy(cp, null); + newAttributes.add(visibleAnnotations); + } + + AttributeInfo signature + = getAttribute(SignatureAttribute.tag); + if (signature != null) { + signature = signature.copy(cp, null); + newAttributes.add(signature); + } + + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + minfo.prune(cp); + } + + list = fields; + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + finfo.prune(cp); + } + + attributes = newAttributes; + constPool = cp; + } + + /** + * Returns a constant pool table. + */ + public ConstPool getConstPool() { + return constPool; + } + + /** + * Returns true if this is an interface. + */ + public boolean isInterface() { + return (accessFlags & AccessFlag.INTERFACE) != 0; + } + + /** + * Returns true if this is a final class or interface. + */ + public boolean isFinal() { + return (accessFlags & AccessFlag.FINAL) != 0; + } + + /** + * Returns true if this is an abstract class or an interface. + */ + public boolean isAbstract() { + return (accessFlags & AccessFlag.ABSTRACT) != 0; + } + + /** + * Returns access flags. + * + * @see javassist.bytecode.AccessFlag + */ + public int getAccessFlags() { + return accessFlags; + } + + /** + * Changes access flags. + * + * @see javassist.bytecode.AccessFlag + */ + public void setAccessFlags(int acc) { + if ((acc & AccessFlag.INTERFACE) == 0) + acc |= AccessFlag.SUPER; + + accessFlags = acc; + } + + /** + * Returns access and property flags of this nested class. + * This method returns -1 if the class is not a nested class. + * + *

The returned value is obtained from inner_class_access_flags + * of the entry representing this nested class itself + * in InnerClasses_attribute. + */ + public int getInnerAccessFlags() { + InnerClassesAttribute ica + = (InnerClassesAttribute)getAttribute(InnerClassesAttribute.tag); + if (ica == null) + return -1; + + String name = getName(); + int n = ica.tableLength(); + for (int i = 0; i < n; ++i) + if (name.equals(ica.innerClass(i))) + return ica.accessFlags(i); + + return -1; + } + + /** + * Returns the class name. + */ + public String getName() { + return thisclassname; + } + + /** + * Sets the class name. This method substitutes the new name for all + * occurrences of the old class name in the class file. + */ + public void setName(String name) { + renameClass(thisclassname, name); + } + + /** + * Returns the super class name. + */ + public String getSuperclass() { + if (cachedSuperclass == null) + cachedSuperclass = constPool.getClassInfo(superClass); + + return cachedSuperclass; + } + + /** + * Returns the index of the constant pool entry representing the super + * class. + */ + public int getSuperclassId() { + return superClass; + } + + /** + * Sets the super class. + * + *

+ * The new super class should inherit from the old super class. + * This method modifies constructors so that they call constructors declared + * in the new super class. + */ + public void setSuperclass(String superclass) throws CannotCompileException { + if (superclass == null) + superclass = "java.lang.Object"; + + try { + this.superClass = constPool.addClassInfo(superclass); + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + minfo.setSuperclass(superclass); + } + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + cachedSuperclass = superclass; + } + + /** + * Replaces all occurrences of a class name in the class file. + * + *

+ * If class X is substituted for class Y in the class file, X and Y must + * have the same signature. If Y provides a method m(), X must provide it + * even if X inherits m() from the super class. If this fact is not + * guaranteed, the bytecode verifier may cause an error. + * + * @param oldname + * the replaced class name + * @param newname + * the substituted class name + */ + public final void renameClass(String oldname, String newname) { + ArrayList list; + int n; + + if (oldname.equals(newname)) + return; + + if (oldname.equals(thisclassname)) + thisclassname = newname; + + oldname = Descriptor.toJvmName(oldname); + newname = Descriptor.toJvmName(newname); + constPool.renameClass(oldname, newname); + + AttributeInfo.renameClass(attributes, oldname, newname); + list = methods; + n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + String desc = minfo.getDescriptor(); + minfo.setDescriptor(Descriptor.rename(desc, oldname, newname)); + AttributeInfo.renameClass(minfo.getAttributes(), oldname, newname); + } + + list = fields; + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + String desc = finfo.getDescriptor(); + finfo.setDescriptor(Descriptor.rename(desc, oldname, newname)); + AttributeInfo.renameClass(finfo.getAttributes(), oldname, newname); + } + } + + /** + * Replaces all occurrences of several class names in the class file. + * + * @param classnames + * specifies which class name is replaced with which new name. + * Class names must be described with the JVM-internal + * representation like java/lang/Object. + * @see #renameClass(String,String) + */ + public final void renameClass(Map classnames) { + String jvmNewThisName = (String)classnames.get(Descriptor + .toJvmName(thisclassname)); + if (jvmNewThisName != null) + thisclassname = Descriptor.toJavaName(jvmNewThisName); + + constPool.renameClass(classnames); + + AttributeInfo.renameClass(attributes, classnames); + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + String desc = minfo.getDescriptor(); + minfo.setDescriptor(Descriptor.rename(desc, classnames)); + AttributeInfo.renameClass(minfo.getAttributes(), classnames); + } + + list = fields; + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + String desc = finfo.getDescriptor(); + finfo.setDescriptor(Descriptor.rename(desc, classnames)); + AttributeInfo.renameClass(finfo.getAttributes(), classnames); + } + } + + /** + * Internal-use only. + * CtClass.getRefClasses() calls this method. + */ + public final void getRefClasses(Map classnames) { + constPool.renameClass(classnames); + + AttributeInfo.getRefClasses(attributes, classnames); + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + String desc = minfo.getDescriptor(); + Descriptor.rename(desc, classnames); + AttributeInfo.getRefClasses(minfo.getAttributes(), classnames); + } + + list = fields; + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + String desc = finfo.getDescriptor(); + Descriptor.rename(desc, classnames); + AttributeInfo.getRefClasses(finfo.getAttributes(), classnames); + } + } + + /** + * Returns the names of the interfaces implemented by the class. + * The returned array is read only. + */ + public String[] getInterfaces() { + if (cachedInterfaces != null) + return cachedInterfaces; + + String[] rtn = null; + if (interfaces == null) + rtn = new String[0]; + else { + int n = interfaces.length; + String[] list = new String[n]; + for (int i = 0; i < n; ++i) + list[i] = constPool.getClassInfo(interfaces[i]); + + rtn = list; + } + + cachedInterfaces = rtn; + return rtn; + } + + /** + * Sets the interfaces. + * + * @param nameList + * the names of the interfaces. + */ + public void setInterfaces(String[] nameList) { + cachedInterfaces = null; + if (nameList != null) { + int n = nameList.length; + interfaces = new int[n]; + for (int i = 0; i < n; ++i) + interfaces[i] = constPool.addClassInfo(nameList[i]); + } + } + + /** + * Appends an interface to the interfaces implemented by the class. + */ + public void addInterface(String name) { + cachedInterfaces = null; + int info = constPool.addClassInfo(name); + if (interfaces == null) { + interfaces = new int[1]; + interfaces[0] = info; + } + else { + int n = interfaces.length; + int[] newarray = new int[n + 1]; + System.arraycopy(interfaces, 0, newarray, 0, n); + newarray[n] = info; + interfaces = newarray; + } + } + + /** + * Returns all the fields declared in the class. + * + * @return a list of FieldInfo. + * @see FieldInfo + */ + public List getFields() { + return fields; + } + + /** + * Appends a field to the class. + * + * @throws DuplicateMemberException when the field is already included. + */ + public void addField(FieldInfo finfo) throws DuplicateMemberException { + testExistingField(finfo.getName(), finfo.getDescriptor()); + fields.add(finfo); + } + + /** + * Just appends a field to the class. + * It does not check field duplication. + * Use this method only when minimizing performance overheads + * is seriously required. + * + * @since 3.13 + */ + public final void addField2(FieldInfo finfo) { + fields.add(finfo); + } + + private void testExistingField(String name, String descriptor) + throws DuplicateMemberException { + ListIterator it = fields.listIterator(0); + while (it.hasNext()) { + FieldInfo minfo = (FieldInfo)it.next(); + if (minfo.getName().equals(name)) + throw new DuplicateMemberException("duplicate field: " + name); + } + } + + /** + * Returns all the methods declared in the class. + * + * @return a list of MethodInfo. + * @see MethodInfo + */ + public List getMethods() { + return methods; + } + + /** + * Returns the method with the specified name. If there are multiple methods + * with that name, this method returns one of them. + * + * @return null if no such method is found. + */ + public MethodInfo getMethod(String name) { + ArrayList list = methods; + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + if (minfo.getName().equals(name)) + return minfo; + } + + return null; + } + + /** + * Returns a static initializer (class initializer), or null if it does not + * exist. + */ + public MethodInfo getStaticInitializer() { + return getMethod(MethodInfo.nameClinit); + } + + /** + * Appends a method to the class. + * If there is a bridge method with the same name and signature, + * then the bridge method is removed before a new method is added. + * + * @throws DuplicateMemberException when the method is already included. + */ + public void addMethod(MethodInfo minfo) throws DuplicateMemberException { + testExistingMethod(minfo); + methods.add(minfo); + } + + /** + * Just appends a method to the class. + * It does not check method duplication or remove a bridge method. + * Use this method only when minimizing performance overheads + * is seriously required. + * + * @since 3.13 + */ + public final void addMethod2(MethodInfo minfo) { + methods.add(minfo); + } + + private void testExistingMethod(MethodInfo newMinfo) + throws DuplicateMemberException + { + String name = newMinfo.getName(); + String descriptor = newMinfo.getDescriptor(); + ListIterator it = methods.listIterator(0); + while (it.hasNext()) + if (isDuplicated(newMinfo, name, descriptor, (MethodInfo)it.next(), it)) + throw new DuplicateMemberException("duplicate method: " + name + + " in " + this.getName()); + } + + private static boolean isDuplicated(MethodInfo newMethod, String newName, + String newDesc, MethodInfo minfo, + ListIterator it) + { + if (!minfo.getName().equals(newName)) + return false; + + String desc = minfo.getDescriptor(); + if (!Descriptor.eqParamTypes(desc, newDesc)) + return false; + + if (desc.equals(newDesc)) { + if (notBridgeMethod(minfo)) + return true; + else { + // if the bridge method with the same signature + // already exists, replace it. + it.remove(); + return false; + } + } + else + return false; + // return notBridgeMethod(minfo) && notBridgeMethod(newMethod); + } + + /* For a bridge method, see Sec. 15.12.4.5 of JLS 3rd Ed. + */ + private static boolean notBridgeMethod(MethodInfo minfo) { + return (minfo.getAccessFlags() & AccessFlag.BRIDGE) == 0; + } + + /** + * Returns all the attributes. The returned List object + * is shared with this object. If you add a new attribute to the list, + * the attribute is also added to the classs file represented by this + * object. If you remove an attribute from the list, it is also removed + * from the class file. + * + * @return a list of AttributeInfo objects. + * @see AttributeInfo + */ + public List getAttributes() { + return attributes; + } + + /** + * Returns the attribute with the specified name. If there are multiple + * attributes with that name, this method returns either of them. It + * returns null if the specified attributed is not found. + * + * @param name attribute name + * @see #getAttributes() + */ + public AttributeInfo getAttribute(String name) { + ArrayList list = attributes; + int n = list.size(); + for (int i = 0; i < n; ++i) { + AttributeInfo ai = (AttributeInfo)list.get(i); + if (ai.getName().equals(name)) + return ai; + } + + return null; + } + + /** + * Appends an attribute. If there is already an attribute with the same + * name, the new one substitutes for it. + * + * @see #getAttributes() + */ + public void addAttribute(AttributeInfo info) { + AttributeInfo.remove(attributes, info.getName()); + attributes.add(info); + } + + /** + * Returns the source file containing this class. + * + * @return null if this information is not available. + */ + public String getSourceFile() { + SourceFileAttribute sf + = (SourceFileAttribute)getAttribute(SourceFileAttribute.tag); + if (sf == null) + return null; + else + return sf.getFileName(); + } + + private void read(DataInputStream in) throws IOException { + int i, n; + int magic = in.readInt(); + if (magic != 0xCAFEBABE) + throw new IOException("bad magic number: " + Integer.toHexString(magic)); + + minor = in.readUnsignedShort(); + major = in.readUnsignedShort(); + constPool = new ConstPool(in); + accessFlags = in.readUnsignedShort(); + thisClass = in.readUnsignedShort(); + constPool.setThisClassInfo(thisClass); + superClass = in.readUnsignedShort(); + n = in.readUnsignedShort(); + if (n == 0) + interfaces = null; + else { + interfaces = new int[n]; + for (i = 0; i < n; ++i) + interfaces[i] = in.readUnsignedShort(); + } + + ConstPool cp = constPool; + n = in.readUnsignedShort(); + fields = new ArrayList(); + for (i = 0; i < n; ++i) + addField2(new FieldInfo(cp, in)); + + n = in.readUnsignedShort(); + methods = new ArrayList(); + for (i = 0; i < n; ++i) + addMethod2(new MethodInfo(cp, in)); + + attributes = new ArrayList(); + n = in.readUnsignedShort(); + for (i = 0; i < n; ++i) + addAttribute(AttributeInfo.read(cp, in)); + + thisclassname = constPool.getClassInfo(thisClass); + } + + /** + * Writes a class file represented by this object into an output stream. + */ + public void write(DataOutputStream out) throws IOException { + int i, n; + + out.writeInt(0xCAFEBABE); // magic + out.writeShort(minor); // minor version + out.writeShort(major); // major version + constPool.write(out); // constant pool + out.writeShort(accessFlags); + out.writeShort(thisClass); + out.writeShort(superClass); + + if (interfaces == null) + n = 0; + else + n = interfaces.length; + + out.writeShort(n); + for (i = 0; i < n; ++i) + out.writeShort(interfaces[i]); + + ArrayList list = fields; + n = list.size(); + out.writeShort(n); + for (i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + finfo.write(out); + } + + list = methods; + n = list.size(); + out.writeShort(n); + for (i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + minfo.write(out); + } + + out.writeShort(attributes.size()); + AttributeInfo.writeAll(attributes, out); + } + + /** + * Get the Major version. + * + * @return the major version + */ + public int getMajorVersion() { + return major; + } + + /** + * Set the major version. + * + * @param major + * the major version + */ + public void setMajorVersion(int major) { + this.major = major; + } + + /** + * Get the minor version. + * + * @return the minor version + */ + public int getMinorVersion() { + return minor; + } + + /** + * Set the minor version. + * + * @param minor + * the minor version + */ + public void setMinorVersion(int minor) { + this.minor = minor; + } + + /** + * Sets the major and minor version to Java 5. + * + * If the major version is older than 49, Java 5 + * extensions such as annotations are ignored + * by the JVM. + */ + public void setVersionToJava5() { + this.major = 49; + this.minor = 0; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java new file mode 100644 index 0000000..a7bd9c7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java @@ -0,0 +1,153 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.PrintWriter; +import com.wenshuo.agent.javassist.Modifier; +import java.util.List; + +/** + * A utility class for priting the contents of a class file. + * It prints a constant pool table, fields, and methods in a + * human readable representation. + */ +public class ClassFilePrinter { + /** + * Prints the contents of a class file to the standard output stream. + */ + public static void print(ClassFile cf) { + print(cf, new PrintWriter(System.out, true)); + } + + /** + * Prints the contents of a class file. + */ + public static void print(ClassFile cf, PrintWriter out) { + List list; + int n; + + /* 0x0020 (SYNCHRONIZED) means ACC_SUPER if the modifiers + * are of a class. + */ + int mod + = AccessFlag.toModifier(cf.getAccessFlags() + & ~AccessFlag.SYNCHRONIZED); + out.println("major: " + cf.major + ", minor: " + cf.minor + + " modifiers: " + Integer.toHexString(cf.getAccessFlags())); + out.println(Modifier.toString(mod) + " class " + + cf.getName() + " extends " + cf.getSuperclass()); + + String[] infs = cf.getInterfaces(); + if (infs != null && infs.length > 0) { + out.print(" implements "); + out.print(infs[0]); + for (int i = 1; i < infs.length; ++i) + out.print(", " + infs[i]); + + out.println(); + } + + out.println(); + list = cf.getFields(); + n = list.size(); + for (int i = 0; i < n; ++i) { + FieldInfo finfo = (FieldInfo)list.get(i); + int acc = finfo.getAccessFlags(); + out.println(Modifier.toString(AccessFlag.toModifier(acc)) + + " " + finfo.getName() + "\t" + + finfo.getDescriptor()); + printAttributes(finfo.getAttributes(), out, 'f'); + } + + out.println(); + list = cf.getMethods(); + n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + int acc = minfo.getAccessFlags(); + out.println(Modifier.toString(AccessFlag.toModifier(acc)) + + " " + minfo.getName() + "\t" + + minfo.getDescriptor()); + printAttributes(minfo.getAttributes(), out, 'm'); + out.println(); + } + + out.println(); + printAttributes(cf.getAttributes(), out, 'c'); + } + + static void printAttributes(List list, PrintWriter out, char kind) { + if (list == null) + return; + + int n = list.size(); + for (int i = 0; i < n; ++i) { + AttributeInfo ai = (AttributeInfo)list.get(i); + if (ai instanceof CodeAttribute) { + CodeAttribute ca = (CodeAttribute)ai; + out.println("attribute: " + ai.getName() + ": " + + ai.getClass().getName()); + out.println("max stack " + ca.getMaxStack() + + ", max locals " + ca.getMaxLocals() + + ", " + ca.getExceptionTable().size() + + " catch blocks"); + out.println(""); + printAttributes(ca.getAttributes(), out, kind); + out.println(""); + } + else if (ai instanceof AnnotationsAttribute) { + out.println("annnotation: " + ai.toString()); + } + else if (ai instanceof ParameterAnnotationsAttribute) { + out.println("parameter annnotations: " + ai.toString()); + } + else if (ai instanceof StackMapTable) { + out.println(""); + StackMapTable.Printer.print((StackMapTable)ai, out); + out.println(""); + } + else if (ai instanceof StackMap) { + out.println(""); + ((StackMap)ai).print(out); + out.println(""); + } + else if (ai instanceof SignatureAttribute) { + SignatureAttribute sa = (SignatureAttribute)ai; + String sig = sa.getSignature(); + out.println("signature: " + sig); + try { + String s; + if (kind == 'c') + s = SignatureAttribute.toClassSignature(sig).toString(); + else if (kind == 'm') + s = SignatureAttribute.toMethodSignature(sig).toString(); + else + s = SignatureAttribute.toFieldSignature(sig).toString(); + + out.println(" " + s); + } + catch (BadBytecode e) { + out.println(" syntax error"); + } + } + else + out.println("attribute: " + ai.getName() + + " (" + ai.get().length + " byte): " + + ai.getClass().getName()); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java new file mode 100644 index 0000000..39ab88b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java @@ -0,0 +1,791 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.OutputStream; +import java.io.DataOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; + +/** + * A quick class-file writer. This is useful when a generated + * class file is simple and the code generation should be fast. + * + *

Example: + * + * 

+ * ClassFileWriter cfw = new ClassFileWriter(ClassFile.JAVA_4, 0);
+ * ConstPoolWriter cpw = cfw.getConstPool();
+ *
+ * FieldWriter fw = cfw.getFieldWriter();
+ * fw.add(AccessFlag.PUBLIC, "value", "I", null);
+ * fw.add(AccessFlag.PUBLIC, "value2", "J", null);
+ *
+ * int thisClass = cpw.addClassInfo("sample/Test");
+ * int superClass = cpw.addClassInfo("java/lang/Object");
+ *
+ * MethodWriter mw = cfw.getMethodWriter();
+ *
+ * mw.begin(AccessFlag.PUBLIC, MethodInfo.nameInit, "()V", null, null);
+ * mw.add(Opcode.ALOAD_0);
+ * mw.add(Opcode.INVOKESPECIAL);
+ * int signature = cpw.addNameAndTypeInfo(MethodInfo.nameInit, "()V");
+ * mw.add16(cpw.addMethodrefInfo(superClass, signature));
+ * mw.add(Opcode.RETURN);
+ * mw.codeEnd(1, 1);
+ * mw.end(null, null);
+ *
+ * mw.begin(AccessFlag.PUBLIC, "one", "()I", null, null);
+ * mw.add(Opcode.ICONST_1);
+ * mw.add(Opcode.IRETURN);
+ * mw.codeEnd(1, 1);
+ * mw.end(null, null);
+ *
+ * byte[] classfile = cfw.end(AccessFlag.PUBLIC, thisClass, superClass,
+ *                            null, null);
+ *
+ * + *

The code above generates the following class: + * + * 

+ * package sample;
+ * public class Test {
+ *     public int value;
+ *     public long value2;
+ *     public Test() { super(); }
+ *     public one() { return 1; }
+ * }
+ *
+ * + * @since 3.13 + */ +public class ClassFileWriter { + private ByteStream output; + private ConstPoolWriter constPool; + private FieldWriter fields; + private MethodWriter methods; + int thisClass, superClass; + + /** + * Constructs a class file writer. + * + * @param major the major version ({@link ClassFile#JAVA_4}, {@link ClassFile#JAVA_5}, ...). + * @param minor the minor version (0 for JDK 1.3 and later). + */ + public ClassFileWriter(int major, int minor) { + output = new ByteStream(512); + output.writeInt(0xCAFEBABE); // magic + output.writeShort(minor); + output.writeShort(major); + constPool = new ConstPoolWriter(output); + fields = new FieldWriter(constPool); + methods = new MethodWriter(constPool); + + } + + /** + * Returns a constant pool. + */ + public ConstPoolWriter getConstPool() { return constPool; } + + /** + * Returns a filed writer. + */ + public FieldWriter getFieldWriter() { return fields; } + + /** + * Returns a method writer. + */ + public MethodWriter getMethodWriter() { return methods; } + + /** + * Ends writing and returns the contents of the class file. + * + * @param accessFlags access flags. + * @param thisClass this class. an index indicating its CONSTANT_Class_info. + * @param superClass super class. an index indicating its CONSTANT_Class_info. + * @param interfaces implemented interfaces. + * index numbers indicating their ClassInfo. + * It may be null. + * @param aw attributes of the class file. May be null. + * + * @see AccessFlag + */ + public byte[] end(int accessFlags, int thisClass, int superClass, + int[] interfaces, AttributeWriter aw) { + constPool.end(); + output.writeShort(accessFlags); + output.writeShort(thisClass); + output.writeShort(superClass); + if (interfaces == null) + output.writeShort(0); + else { + int n = interfaces.length; + output.writeShort(n); + for (int i = 0; i < n; i++) + output.writeShort(interfaces[i]); + } + + output.enlarge(fields.dataSize() + methods.dataSize() + 6); + try { + output.writeShort(fields.size()); + fields.write(output); + + output.writeShort(methods.numOfMethods()); + methods.write(output); + } + catch (IOException e) {} + + writeAttribute(output, aw, 0); + return output.toByteArray(); + } + + /** + * Ends writing and writes the contents of the class file into the + * given output stream. + * + * @param accessFlags access flags. + * @param thisClass this class. an index indicating its CONSTANT_Class_info. + * @param superClass super class. an index indicating its CONSTANT_Class_info. + * @param interfaces implemented interfaces. + * index numbers indicating their CONSTATNT_Class_info. + * It may be null. + * @param aw attributes of the class file. May be null. + * + * @see AccessFlag + */ + public void end(DataOutputStream out, + int accessFlags, int thisClass, int superClass, + int[] interfaces, AttributeWriter aw) + throws IOException + { + constPool.end(); + output.writeTo(out); + out.writeShort(accessFlags); + out.writeShort(thisClass); + out.writeShort(superClass); + if (interfaces == null) + out.writeShort(0); + else { + int n = interfaces.length; + out.writeShort(n); + for (int i = 0; i < n; i++) + out.writeShort(interfaces[i]); + } + + out.writeShort(fields.size()); + fields.write(out); + + out.writeShort(methods.numOfMethods()); + methods.write(out); + if (aw == null) + out.writeShort(0); + else { + out.writeShort(aw.size()); + aw.write(out); + } + } + + /** + * This writes attributes. + * + *

For example, the following object writes a synthetic attribute: + * + * 

+     * ConstPoolWriter cpw = ...;
+     * final int tag = cpw.addUtf8Info("Synthetic");
+     * AttributeWriter aw = new AttributeWriter() {
+     *     public int size() {
+     *         return 1;
+     *     }
+     *     public void write(DataOutputStream out) throws java.io.IOException {
+     *         out.writeShort(tag);
+     *         out.writeInt(0);
+     *     }
+     * };
+     *
+ */ + public static interface AttributeWriter { + /** + * Returns the number of attributes that this writer will + * write. + */ + public int size(); + + /** + * Writes all the contents of the attributes. The binary representation + * of the contents is an array of attribute_info. + */ + public void write(DataOutputStream out) throws IOException; + } + + static void writeAttribute(ByteStream bs, AttributeWriter aw, int attrCount) { + if (aw == null) { + bs.writeShort(attrCount); + return; + } + + bs.writeShort(aw.size() + attrCount); + DataOutputStream dos = new DataOutputStream(bs); + try { + aw.write(dos); + dos.flush(); + } + catch (IOException e) {} + } + + /** + * Field. + */ + public static final class FieldWriter { + protected ByteStream output; + protected ConstPoolWriter constPool; + private int fieldCount; + + FieldWriter(ConstPoolWriter cp) { + output = new ByteStream(128); + constPool = cp; + fieldCount = 0; + } + + /** + * Adds a new field. + * + * @param accessFlags access flags. + * @param name the field name. + * @param descriptor the field type. + * @param aw the attributes of the field. may be null. + * @see AccessFlag + */ + public void add(int accessFlags, String name, String descriptor, AttributeWriter aw) { + int nameIndex = constPool.addUtf8Info(name); + int descIndex = constPool.addUtf8Info(descriptor); + add(accessFlags, nameIndex, descIndex, aw); + } + + /** + * Adds a new field. + * + * @param accessFlags access flags. + * @param name the field name. an index indicating its CONSTANT_Utf8_info. + * @param descriptor the field type. an index indicating its CONSTANT_Utf8_info. + * @param aw the attributes of the field. may be null. + * @see AccessFlag + */ + public void add(int accessFlags, int name, int descriptor, AttributeWriter aw) { + ++fieldCount; + output.writeShort(accessFlags); + output.writeShort(name); + output.writeShort(descriptor); + writeAttribute(output, aw, 0); + } + + int size() { return fieldCount; } + + int dataSize() { return output.size(); } + + /** + * Writes the added fields. + */ + void write(OutputStream out) throws IOException { + output.writeTo(out); + } + } + + /** + * Method. + */ + public static final class MethodWriter { + protected ByteStream output; + protected ConstPoolWriter constPool; + private int methodCount; + protected int codeIndex; + protected int throwsIndex; + protected int stackIndex; + + private int startPos; + private boolean isAbstract; + private int catchPos; + private int catchCount; + + MethodWriter(ConstPoolWriter cp) { + output = new ByteStream(256); + constPool = cp; + methodCount = 0; + codeIndex = 0; + throwsIndex = 0; + stackIndex = 0; + } + + /** + * Starts Adding a new method. + * + * @param accessFlags access flags. + * @param name the method name. + * @param descriptor the method signature. + * @param exceptions throws clause. It may be null. + * The class names must be the JVM-internal + * representations like java/lang/Exception. + * @param aw attributes to the Method_info. + */ + public void begin(int accessFlags, String name, String descriptor, + String[] exceptions, AttributeWriter aw) { + int nameIndex = constPool.addUtf8Info(name); + int descIndex = constPool.addUtf8Info(descriptor); + int[] intfs; + if (exceptions == null) + intfs = null; + else + intfs = constPool.addClassInfo(exceptions); + + begin(accessFlags, nameIndex, descIndex, intfs, aw); + } + + /** + * Starts adding a new method. + * + * @param accessFlags access flags. + * @param name the method name. an index indicating its CONSTANT_Utf8_info. + * @param descriptor the field type. an index indicating its CONSTANT_Utf8_info. + * @param exceptions throws clause. indexes indicating CONSTANT_Class_infos. + * It may be null. + * @param aw attributes to the Method_info. + */ + public void begin(int accessFlags, int name, int descriptor, int[] exceptions, AttributeWriter aw) { + ++methodCount; + output.writeShort(accessFlags); + output.writeShort(name); + output.writeShort(descriptor); + isAbstract = (accessFlags & AccessFlag.ABSTRACT) != 0; + + int attrCount = isAbstract ? 0 : 1; + if (exceptions != null) + ++attrCount; + + writeAttribute(output, aw, attrCount); + + if (exceptions != null) + writeThrows(exceptions); + + if (!isAbstract) { + if (codeIndex == 0) + codeIndex = constPool.addUtf8Info(CodeAttribute.tag); + + startPos = output.getPos(); + output.writeShort(codeIndex); + output.writeBlank(12); // attribute_length, maxStack, maxLocals, code_lenth + } + + catchPos = -1; + catchCount = 0; + } + + private void writeThrows(int[] exceptions) { + if (throwsIndex == 0) + throwsIndex = constPool.addUtf8Info(ExceptionsAttribute.tag); + + output.writeShort(throwsIndex); + output.writeInt(exceptions.length * 2 + 2); + output.writeShort(exceptions.length); + for (int i = 0; i < exceptions.length; i++) + output.writeShort(exceptions[i]); + } + + /** + * Appends an 8bit value of bytecode. + * + * @see Opcode + */ + public void add(int b) { + output.write(b); + } + + /** + * Appends a 16bit value of bytecode. + */ + public void add16(int b) { + output.writeShort(b); + } + + /** + * Appends a 32bit value of bytecode. + */ + public void add32(int b) { + output.writeInt(b); + } + + /** + * Appends a invokevirtual, inovkespecial, or invokestatic bytecode. + * + * @see Opcode + */ + public void addInvoke(int opcode, String targetClass, String methodName, + String descriptor) { + int target = constPool.addClassInfo(targetClass); + int nt = constPool.addNameAndTypeInfo(methodName, descriptor); + int method = constPool.addMethodrefInfo(target, nt); + add(opcode); + add16(method); + } + + /** + * Ends appending bytecode. + */ + public void codeEnd(int maxStack, int maxLocals) { + if (!isAbstract) { + output.writeShort(startPos + 6, maxStack); + output.writeShort(startPos + 8, maxLocals); + output.writeInt(startPos + 10, output.getPos() - startPos - 14); // code_length + catchPos = output.getPos(); + catchCount = 0; + output.writeShort(0); // number of catch clauses + } + } + + /** + * Appends an exception_table entry to the + * Code_attribute. This method is available + * only after the codeEnd method is called. + * + * @param catchType an index indicating a CONSTANT_Class_info. + */ + public void addCatch(int startPc, int endPc, int handlerPc, int catchType) { + ++catchCount; + output.writeShort(startPc); + output.writeShort(endPc); + output.writeShort(handlerPc); + output.writeShort(catchType); + } + + /** + * Ends adding a new method. The add method must be + * called before the end method is called. + * + * @param smap a stack map table. may be null. + * @param aw attributes to the Code_attribute. + * may be null. + */ + public void end(StackMapTable.Writer smap, AttributeWriter aw) { + if (isAbstract) + return; + + // exception_table_length + output.writeShort(catchPos, catchCount); + + int attrCount = smap == null ? 0 : 1; + writeAttribute(output, aw, attrCount); + + if (smap != null) { + if (stackIndex == 0) + stackIndex = constPool.addUtf8Info(StackMapTable.tag); + + output.writeShort(stackIndex); + byte[] data = smap.toByteArray(); + output.writeInt(data.length); + output.write(data); + } + + // Code attribute_length + output.writeInt(startPos + 2, output.getPos() - startPos - 6); + } + + /** + * Returns the length of the bytecode that has been added so far. + * + * @return the length in bytes. + * @since 3.19 + */ + public int size() { return output.getPos() - startPos - 14; } + + int numOfMethods() { return methodCount; } + + int dataSize() { return output.size(); } + + /** + * Writes the added methods. + */ + void write(OutputStream out) throws IOException { + output.writeTo(out); + } + } + + /** + * Constant Pool. + */ + public static final class ConstPoolWriter { + ByteStream output; + protected int startPos; + protected int num; + + ConstPoolWriter(ByteStream out) { + output = out; + startPos = out.getPos(); + num = 1; + output.writeShort(1); // number of entries + } + + /** + * Makes CONSTANT_Class_info objects for each class name. + * + * @return an array of indexes indicating CONSTANT_Class_infos. + */ + public int[] addClassInfo(String[] classNames) { + int n = classNames.length; + int[] result = new int[n]; + for (int i = 0; i < n; i++) + result[i] = addClassInfo(classNames[i]); + + return result; + } + + /** + * Adds a new CONSTANT_Class_info structure. + * + *

This also adds a CONSTANT_Utf8_info structure + * for storing the class name. + * + * @param jvmname the JVM-internal representation of a class name. + * e.g. java/lang/Object. + * @return the index of the added entry. + */ + public int addClassInfo(String jvmname) { + int utf8 = addUtf8Info(jvmname); + output.write(ClassInfo.tag); + output.writeShort(utf8); + return num++; + } + + /** + * Adds a new CONSTANT_Class_info structure. + * + * @param name name_index + * @return the index of the added entry. + */ + public int addClassInfo(int name) { + output.write(ClassInfo.tag); + output.writeShort(name); + return num++; + } + + /** + * Adds a new CONSTANT_NameAndType_info structure. + * + * @param name name_index + * @param type descriptor_index + * @return the index of the added entry. + */ + public int addNameAndTypeInfo(String name, String type) { + return addNameAndTypeInfo(addUtf8Info(name), addUtf8Info(type)); + } + + /** + * Adds a new CONSTANT_NameAndType_info structure. + * + * @param name name_index + * @param type descriptor_index + * @return the index of the added entry. + */ + public int addNameAndTypeInfo(int name, int type) { + output.write(NameAndTypeInfo.tag); + output.writeShort(name); + output.writeShort(type); + return num++; + } + + /** + * Adds a new CONSTANT_Fieldref_info structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addFieldrefInfo(int classInfo, int nameAndTypeInfo) { + output.write(FieldrefInfo.tag); + output.writeShort(classInfo); + output.writeShort(nameAndTypeInfo); + return num++; + } + + /** + * Adds a new CONSTANT_Methodref_info structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addMethodrefInfo(int classInfo, int nameAndTypeInfo) { + output.write(MethodrefInfo.tag); + output.writeShort(classInfo); + output.writeShort(nameAndTypeInfo); + return num++; + } + + /** + * Adds a new CONSTANT_InterfaceMethodref_info + * structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addInterfaceMethodrefInfo(int classInfo, + int nameAndTypeInfo) { + output.write(InterfaceMethodrefInfo.tag); + output.writeShort(classInfo); + output.writeShort(nameAndTypeInfo); + return num++; + } + + /** + * Adds a new CONSTANT_MethodHandle_info + * structure. + * + * @param kind reference_kind + * such as {@link ConstPool#REF_invokeStatic REF_invokeStatic}. + * @param index reference_index. + * @return the index of the added entry. + * + * @since 3.17.1 + */ + public int addMethodHandleInfo(int kind, int index) { + output.write(MethodHandleInfo.tag); + output.write(kind); + output.writeShort(index); + return num++; + } + + /** + * Adds a new CONSTANT_MethodType_info + * structure. + * + * @param desc descriptor_index. + * @return the index of the added entry. + * + * @since 3.17.1 + */ + public int addMethodTypeInfo(int desc) { + output.write(MethodTypeInfo.tag); + output.writeShort(desc); + return num++; + } + + /** + * Adds a new CONSTANT_InvokeDynamic_info + * structure. + * + * @param bootstrap bootstrap_method_attr_index. + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + * + * @since 3.17.1 + */ + public int addInvokeDynamicInfo(int bootstrap, + int nameAndTypeInfo) { + output.write(InvokeDynamicInfo.tag); + output.writeShort(bootstrap); + output.writeShort(nameAndTypeInfo); + return num++; + } + + /** + * Adds a new CONSTANT_String_info + * structure. + * + *

This also adds a new CONSTANT_Utf8_info + * structure. + * + * @return the index of the added entry. + */ + public int addStringInfo(String str) { + int utf8 = addUtf8Info(str); + output.write(StringInfo.tag); + output.writeShort(utf8); + return num++; + } + + /** + * Adds a new CONSTANT_Integer_info + * structure. + * + * @return the index of the added entry. + */ + public int addIntegerInfo(int i) { + output.write(IntegerInfo.tag); + output.writeInt(i); + return num++; + } + + /** + * Adds a new CONSTANT_Float_info + * structure. + * + * @return the index of the added entry. + */ + public int addFloatInfo(float f) { + output.write(FloatInfo.tag); + output.writeFloat(f); + return num++; + } + + /** + * Adds a new CONSTANT_Long_info + * structure. + * + * @return the index of the added entry. + */ + public int addLongInfo(long l) { + output.write(LongInfo.tag); + output.writeLong(l); + int n = num; + num += 2; + return n; + } + + /** + * Adds a new CONSTANT_Double_info + * structure. + * + * @return the index of the added entry. + */ + public int addDoubleInfo(double d) { + output.write(DoubleInfo.tag); + output.writeDouble(d); + int n = num; + num += 2; + return n; + } + + /** + * Adds a new CONSTANT_Utf8_info + * structure. + * + * @return the index of the added entry. + */ + public int addUtf8Info(String utf8) { + output.write(Utf8Info.tag); + output.writeUTF(utf8); + return num++; + } + + /** + * Writes the contents of this class pool. + */ + void end() { + output.writeShort(startPos, num); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java new file mode 100644 index 0000000..8efc6d4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java @@ -0,0 +1,267 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * Utility for computing max_stack. + */ +class CodeAnalyzer implements Opcode { + private ConstPool constPool; + private CodeAttribute codeAttr; + + public CodeAnalyzer(CodeAttribute ca) { + codeAttr = ca; + constPool = ca.getConstPool(); + } + + public int computeMaxStack() + throws BadBytecode + { + /* d = stack[i] + * d == 0: not visited + * d > 0: the depth is d - 1 after executing the bytecode at i. + * d < 0: not visited. the initial depth (before execution) is 1 - d. + */ + CodeIterator ci = codeAttr.iterator(); + int length = ci.getCodeLength(); + int[] stack = new int[length]; + constPool = codeAttr.getConstPool(); + initStack(stack, codeAttr); + boolean repeat; + do { + repeat = false; + for (int i = 0; i < length; ++i) + if (stack[i] < 0) { + repeat = true; + visitBytecode(ci, stack, i); + } + } while (repeat); + + int maxStack = 1; + for (int i = 0; i < length; ++i) + if (stack[i] > maxStack) + maxStack = stack[i]; + + return maxStack - 1; // the base is 1. + } + + private void initStack(int[] stack, CodeAttribute ca) { + stack[0] = -1; + ExceptionTable et = ca.getExceptionTable(); + if (et != null) { + int size = et.size(); + for (int i = 0; i < size; ++i) + stack[et.handlerPc(i)] = -2; // an exception is on stack + } + } + + private void visitBytecode(CodeIterator ci, int[] stack, int index) + throws BadBytecode + { + int codeLength = stack.length; + ci.move(index); + int stackDepth = -stack[index]; + int[] jsrDepth = new int[1]; + jsrDepth[0] = -1; + while (ci.hasNext()) { + index = ci.next(); + stack[index] = stackDepth; + int op = ci.byteAt(index); + stackDepth = visitInst(op, ci, index, stackDepth); + if (stackDepth < 1) + throw new BadBytecode("stack underflow at " + index); + + if (processBranch(op, ci, index, codeLength, stack, stackDepth, jsrDepth)) + break; + + if (isEnd(op)) // return, ireturn, athrow, ... + break; + + if (op == JSR || op == JSR_W) + --stackDepth; + } + } + + private boolean processBranch(int opcode, CodeIterator ci, int index, + int codeLength, int[] stack, int stackDepth, int[] jsrDepth) + throws BadBytecode + { + if ((IFEQ <= opcode && opcode <= IF_ACMPNE) + || opcode == IFNULL || opcode == IFNONNULL) { + int target = index + ci.s16bitAt(index + 1); + checkTarget(index, target, codeLength, stack, stackDepth); + } + else { + int target, index2; + switch (opcode) { + case GOTO : + target = index + ci.s16bitAt(index + 1); + checkTarget(index, target, codeLength, stack, stackDepth); + return true; + case GOTO_W : + target = index + ci.s32bitAt(index + 1); + checkTarget(index, target, codeLength, stack, stackDepth); + return true; + case JSR : + case JSR_W : + if (opcode == JSR) + target = index + ci.s16bitAt(index + 1); + else + target = index + ci.s32bitAt(index + 1); + + checkTarget(index, target, codeLength, stack, stackDepth); + /* + * It is unknown which RET comes back to this JSR. + * So we assume that if the stack depth at one JSR instruction + * is N, then it is also N at other JSRs and N - 1 at all RET + * instructions. Note that STACK_GROW[JSR] is 1 since it pushes + * a return address on the operand stack. + */ + if (jsrDepth[0] < 0) { + jsrDepth[0] = stackDepth; + return false; + } + else if (stackDepth == jsrDepth[0]) + return false; + else + throw new BadBytecode( + "sorry, cannot compute this data flow due to JSR: " + + stackDepth + "," + jsrDepth[0]); + case RET : + if (jsrDepth[0] < 0) { + jsrDepth[0] = stackDepth + 1; + return false; + } + else if (stackDepth + 1 == jsrDepth[0]) + return true; + else + throw new BadBytecode( + "sorry, cannot compute this data flow due to RET: " + + stackDepth + "," + jsrDepth[0]); + case LOOKUPSWITCH : + case TABLESWITCH : + index2 = (index & ~3) + 4; + target = index + ci.s32bitAt(index2); + checkTarget(index, target, codeLength, stack, stackDepth); + if (opcode == LOOKUPSWITCH) { + int npairs = ci.s32bitAt(index2 + 4); + index2 += 12; + for (int i = 0; i < npairs; ++i) { + target = index + ci.s32bitAt(index2); + checkTarget(index, target, codeLength, + stack, stackDepth); + index2 += 8; + } + } + else { + int low = ci.s32bitAt(index2 + 4); + int high = ci.s32bitAt(index2 + 8); + int n = high - low + 1; + index2 += 12; + for (int i = 0; i < n; ++i) { + target = index + ci.s32bitAt(index2); + checkTarget(index, target, codeLength, + stack, stackDepth); + index2 += 4; + } + } + + return true; // always branch. + } + } + + return false; // may not branch. + } + + private void checkTarget(int opIndex, int target, int codeLength, + int[] stack, int stackDepth) + throws BadBytecode + { + if (target < 0 || codeLength <= target) + throw new BadBytecode("bad branch offset at " + opIndex); + + int d = stack[target]; + if (d == 0) + stack[target] = -stackDepth; + else if (d != stackDepth && d != -stackDepth) + throw new BadBytecode("verification error (" + stackDepth + + "," + d + ") at " + opIndex); + } + + private static boolean isEnd(int opcode) { + return (IRETURN <= opcode && opcode <= RETURN) || opcode == ATHROW; + } + + /** + * Visits an instruction. + */ + private int visitInst(int op, CodeIterator ci, int index, int stack) + throws BadBytecode + { + String desc; + switch (op) { + case GETFIELD : + stack += getFieldSize(ci, index) - 1; + break; + case PUTFIELD : + stack -= getFieldSize(ci, index) + 1; + break; + case GETSTATIC : + stack += getFieldSize(ci, index); + break; + case PUTSTATIC : + stack -= getFieldSize(ci, index); + break; + case INVOKEVIRTUAL : + case INVOKESPECIAL : + desc = constPool.getMethodrefType(ci.u16bitAt(index + 1)); + stack += Descriptor.dataSize(desc) - 1; + break; + case INVOKESTATIC : + desc = constPool.getMethodrefType(ci.u16bitAt(index + 1)); + stack += Descriptor.dataSize(desc); + break; + case INVOKEINTERFACE : + desc = constPool.getInterfaceMethodrefType( + ci.u16bitAt(index + 1)); + stack += Descriptor.dataSize(desc) - 1; + break; + case INVOKEDYNAMIC : + desc = constPool.getInvokeDynamicType(ci.u16bitAt(index + 1)); + stack += Descriptor.dataSize(desc); // assume CosntPool#REF_invokeStatic + break; + case ATHROW : + stack = 1; // the stack becomes empty (1 means no values). + break; + case MULTIANEWARRAY : + stack += 1 - ci.byteAt(index + 3); + break; + case WIDE : + op = ci.byteAt(index + 1); + // don't break here. + default : + stack += STACK_GROW[op]; + } + + return stack; + } + + private int getFieldSize(CodeIterator ci, int index) { + String desc = constPool.getFieldrefType(ci.u16bitAt(index + 1)); + return Descriptor.dataSize(desc); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java new file mode 100644 index 0000000..86e7bd9 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java @@ -0,0 +1,595 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.List; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.Map; + +/** + * Code_attribute. + * + *

To browse the code field of + * a Code_attribute structure, + * use CodeIterator. + * + * @see CodeIterator + * @see #iterator() + */ +public class CodeAttribute extends AttributeInfo implements Opcode { + /** + * The name of this attribute "Code". + */ + public static final String tag = "Code"; + + // code[] is stored in AttributeInfo.info. + + private int maxStack; + private int maxLocals; + private ExceptionTable exceptions; + private ArrayList attributes; + + /** + * Constructs a Code_attribute. + * + * @param cp constant pool table + * @param stack max_stack + * @param locals max_locals + * @param code code[] + * @param etable exception_table[] + */ + public CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, + ExceptionTable etable) + { + super(cp, tag); + maxStack = stack; + maxLocals = locals; + info = code; + exceptions = etable; + attributes = new ArrayList(); + } + + /** + * Constructs a copy of Code_attribute. + * Specified class names are replaced during the copy. + * + * @param cp constant pool table. + * @param src source Code attribute. + * @param classnames pairs of replaced and substituted + * class names. + */ + private CodeAttribute(ConstPool cp, CodeAttribute src, Map classnames) + throws BadBytecode + { + super(cp, tag); + + maxStack = src.getMaxStack(); + maxLocals = src.getMaxLocals(); + exceptions = src.getExceptionTable().copy(cp, classnames); + attributes = new ArrayList(); + List src_attr = src.getAttributes(); + int num = src_attr.size(); + for (int i = 0; i < num; ++i) { + AttributeInfo ai = (AttributeInfo)src_attr.get(i); + attributes.add(ai.copy(cp, classnames)); + } + + info = src.copyCode(cp, classnames, exceptions, this); + } + + CodeAttribute(ConstPool cp, int name_id, DataInputStream in) + throws IOException + { + super(cp, name_id, (byte[])null); + int attr_len = in.readInt(); + + maxStack = in.readUnsignedShort(); + maxLocals = in.readUnsignedShort(); + + int code_len = in.readInt(); + info = new byte[code_len]; + in.readFully(info); + + exceptions = new ExceptionTable(cp, in); + + attributes = new ArrayList(); + int num = in.readUnsignedShort(); + for (int i = 0; i < num; ++i) + attributes.add(AttributeInfo.read(cp, in)); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + * @exception RuntimeCopyException if a BadBytecode + * exception is thrown, it is + * converted into + * RuntimeCopyException. + * + * @return CodeAttribute object. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) + throws RuntimeCopyException + { + try { + return new CodeAttribute(newCp, this, classnames); + } + catch (BadBytecode e) { + throw new RuntimeCopyException("bad bytecode. fatal?"); + } + } + + /** + * An exception that may be thrown by copy() + * in CodeAttribute. + */ + public static class RuntimeCopyException extends RuntimeException { + /** + * Constructs an exception. + */ + public RuntimeCopyException(String s) { + super(s); + } + } + + /** + * Returns the length of this attribute_info + * structure. + * The returned value is attribute_length + 6. + */ + public int length() { + return 18 + info.length + exceptions.size() * 8 + + AttributeInfo.getLength(attributes); + } + + void write(DataOutputStream out) throws IOException { + out.writeShort(name); // attribute_name_index + out.writeInt(length() - 6); // attribute_length + out.writeShort(maxStack); // max_stack + out.writeShort(maxLocals); // max_locals + out.writeInt(info.length); // code_length + out.write(info); // code + exceptions.write(out); + out.writeShort(attributes.size()); // attributes_count + AttributeInfo.writeAll(attributes, out); // attributes + } + + /** + * This method is not available. + * + * @throws java.lang.UnsupportedOperationException always thrown. + */ + public byte[] get() { + throw new UnsupportedOperationException("CodeAttribute.get()"); + } + + /** + * This method is not available. + * + * @throws java.lang.UnsupportedOperationException always thrown. + */ + public void set(byte[] newinfo) { + throw new UnsupportedOperationException("CodeAttribute.set()"); + } + + void renameClass(String oldname, String newname) { + AttributeInfo.renameClass(attributes, oldname, newname); + } + + void renameClass(Map classnames) { + AttributeInfo.renameClass(attributes, classnames); + } + + void getRefClasses(Map classnames) { + AttributeInfo.getRefClasses(attributes, classnames); + } + + /** + * Returns the name of the class declaring the method including + * this code attribute. + */ + public String getDeclaringClass() { + ConstPool cp = getConstPool(); + return cp.getClassName(); + } + + /** + * Returns max_stack. + */ + public int getMaxStack() { + return maxStack; + } + + /** + * Sets max_stack. + */ + public void setMaxStack(int value) { + maxStack = value; + } + + /** + * Computes the maximum stack size and sets max_stack + * to the computed size. + * + * @throws BadBytecode if this method fails in computing. + * @return the newly computed value of max_stack + */ + public int computeMaxStack() throws BadBytecode { + maxStack = new CodeAnalyzer(this).computeMaxStack(); + return maxStack; + } + + /** + * Returns max_locals. + */ + public int getMaxLocals() { + return maxLocals; + } + + /** + * Sets max_locals. + */ + public void setMaxLocals(int value) { + maxLocals = value; + } + + /** + * Returns code_length. + */ + public int getCodeLength() { + return info.length; + } + + /** + * Returns code[]. + */ + public byte[] getCode() { + return info; + } + + /** + * Sets code[]. + */ + void setCode(byte[] newinfo) { super.set(newinfo); } + + /** + * Makes a new iterator for reading this code attribute. + */ + public CodeIterator iterator() { + return new CodeIterator(this); + } + + /** + * Returns exception_table[]. + */ + public ExceptionTable getExceptionTable() { return exceptions; } + + /** + * Returns attributes[]. + * It returns a list of AttributeInfo. + * A new element can be added to the returned list + * and an existing element can be removed from the list. + * + * @see AttributeInfo + */ + public List getAttributes() { return attributes; } + + /** + * Returns the attribute with the specified name. + * If it is not found, this method returns null. + * + * @param name attribute name + * @return an AttributeInfo object or null. + */ + public AttributeInfo getAttribute(String name) { + return AttributeInfo.lookup(attributes, name); + } + + /** + * Adds a stack map table. If another copy of stack map table + * is already contained, the old one is removed. + * + * @param smt the stack map table added to this code attribute. + * If it is null, a new stack map is not added. + * Only the old stack map is removed. + */ + public void setAttribute(StackMapTable smt) { + AttributeInfo.remove(attributes, StackMapTable.tag); + if (smt != null) + attributes.add(smt); + } + + /** + * Adds a stack map table for J2ME (CLDC). If another copy of stack map table + * is already contained, the old one is removed. + * + * @param sm the stack map table added to this code attribute. + * If it is null, a new stack map is not added. + * Only the old stack map is removed. + * @since 3.12 + */ + public void setAttribute(StackMap sm) { + AttributeInfo.remove(attributes, StackMap.tag); + if (sm != null) + attributes.add(sm); + } + + /** + * Copies code. + */ + private byte[] copyCode(ConstPool destCp, Map classnames, + ExceptionTable etable, CodeAttribute destCa) + throws BadBytecode + { + int len = getCodeLength(); + byte[] newCode = new byte[len]; + destCa.info = newCode; + LdcEntry ldc = copyCode(this.info, 0, len, this.getConstPool(), + newCode, destCp, classnames); + return LdcEntry.doit(newCode, ldc, etable, destCa); + } + + private static LdcEntry copyCode(byte[] code, int beginPos, int endPos, + ConstPool srcCp, byte[] newcode, + ConstPool destCp, Map classnameMap) + throws BadBytecode + { + int i2, index; + LdcEntry ldcEntry = null; + + for (int i = beginPos; i < endPos; i = i2) { + i2 = CodeIterator.nextOpcode(code, i); + byte c = code[i]; + newcode[i] = c; + switch (c & 0xff) { + case LDC_W : + case LDC2_W : + case GETSTATIC : + case PUTSTATIC : + case GETFIELD : + case PUTFIELD : + case INVOKEVIRTUAL : + case INVOKESPECIAL : + case INVOKESTATIC : + case NEW : + case ANEWARRAY : + case CHECKCAST : + case INSTANCEOF : + copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, + classnameMap); + break; + case LDC : + index = code[i + 1] & 0xff; + index = srcCp.copy(index, destCp, classnameMap); + if (index < 0x100) + newcode[i + 1] = (byte)index; + else { + newcode[i] = NOP; + newcode[i + 1] = NOP; + LdcEntry ldc = new LdcEntry(); + ldc.where = i; + ldc.index = index; + ldc.next = ldcEntry; + ldcEntry = ldc; + } + break; + case INVOKEINTERFACE : + copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, + classnameMap); + newcode[i + 3] = code[i + 3]; + newcode[i + 4] = code[i + 4]; + break; + case INVOKEDYNAMIC : + copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, + classnameMap); + newcode[i + 3] = 0; + newcode[i + 4] = 0; + break; + case MULTIANEWARRAY : + copyConstPoolInfo(i + 1, code, srcCp, newcode, destCp, + classnameMap); + newcode[i + 3] = code[i + 3]; + break; + default : + while (++i < i2) + newcode[i] = code[i]; + + break; + } + } + + return ldcEntry; + } + + private static void copyConstPoolInfo(int i, byte[] code, ConstPool srcCp, + byte[] newcode, ConstPool destCp, + Map classnameMap) { + int index = ((code[i] & 0xff) << 8) | (code[i + 1] & 0xff); + index = srcCp.copy(index, destCp, classnameMap); + newcode[i] = (byte)(index >> 8); + newcode[i + 1] = (byte)index; + } + + static class LdcEntry { + LdcEntry next; + int where; + int index; + + static byte[] doit(byte[] code, LdcEntry ldc, ExceptionTable etable, + CodeAttribute ca) + throws BadBytecode + { + if (ldc != null) + code = CodeIterator.changeLdcToLdcW(code, etable, ca, ldc); + + /* The original code was the following: + + while (ldc != null) { + int where = ldc.where; + code = CodeIterator.insertGapCore0(code, where, 1, false, etable, ca); + code[where] = (byte)Opcode.LDC_W; + ByteArray.write16bit(ldc.index, code, where + 1); + ldc = ldc.next; + } + + But this code does not support a large method > 32KB. + */ + + return code; + } + } + + /** + * Changes the index numbers of the local variables + * to append a new parameter. + * This method does not update LocalVariableAttribute, + * LocalVariableTypeAttribute, + * StackMapTable, or StackMap. + * These attributes must be explicitly updated. + * + * @param where the index of the new parameter. + * @param size the type size of the new parameter (1 or 2). + * + * @see LocalVariableAttribute#shiftIndex(int, int) + * @see LocalVariableTypeAttribute#shiftIndex(int, int) + * @see StackMapTable#insertLocal(int, int, int) + * @see StackMap#insertLocal(int, int, int) + */ + public void insertLocalVar(int where, int size) throws BadBytecode { + CodeIterator ci = iterator(); + while (ci.hasNext()) + shiftIndex(ci, where, size); + + setMaxLocals(getMaxLocals() + size); + } + + /** + * @param lessThan If the index of the local variable is + * less than this value, it does not change. + * Otherwise, the index is increased. + * @param delta the indexes of the local variables are + * increased by this value. + */ + private static void shiftIndex(CodeIterator ci, int lessThan, int delta) throws BadBytecode { + int index = ci.next(); + int opcode = ci.byteAt(index); + if (opcode < ILOAD) + return; + else if (opcode < IASTORE) { + if (opcode < ILOAD_0) { + // iload, lload, fload, dload, aload + shiftIndex8(ci, index, opcode, lessThan, delta); + } + else if (opcode < IALOAD) { + // iload_0, ..., aload_3 + shiftIndex0(ci, index, opcode, lessThan, delta, ILOAD_0, ILOAD); + } + else if (opcode < ISTORE) + return; + else if (opcode < ISTORE_0) { + // istore, lstore, ... + shiftIndex8(ci, index, opcode, lessThan, delta); + } + else { + // istore_0, ..., astore_3 + shiftIndex0(ci, index, opcode, lessThan, delta, ISTORE_0, ISTORE); + } + } + else if (opcode == IINC) { + int var = ci.byteAt(index + 1); + if (var < lessThan) + return; + + var += delta; + if (var < 0x100) + ci.writeByte(var, index + 1); + else { + int plus = (byte)ci.byteAt(index + 2); + int pos = ci.insertExGap(3); + ci.writeByte(WIDE, pos - 3); + ci.writeByte(IINC, pos - 2); + ci.write16bit(var, pos - 1); + ci.write16bit(plus, pos + 1); + } + } + else if (opcode == RET) + shiftIndex8(ci, index, opcode, lessThan, delta); + else if (opcode == WIDE) { + int var = ci.u16bitAt(index + 2); + if (var < lessThan) + return; + + var += delta; + ci.write16bit(var, index + 2); + } + } + + private static void shiftIndex8(CodeIterator ci, int index, int opcode, + int lessThan, int delta) + throws BadBytecode + { + int var = ci.byteAt(index + 1); + if (var < lessThan) + return; + + var += delta; + if (var < 0x100) + ci.writeByte(var, index + 1); + else { + int pos = ci.insertExGap(2); + ci.writeByte(WIDE, pos - 2); + ci.writeByte(opcode, pos - 1); + ci.write16bit(var, pos); + } + } + + private static void shiftIndex0(CodeIterator ci, int index, int opcode, + int lessThan, int delta, + int opcode_i_0, int opcode_i) + throws BadBytecode + { + int var = (opcode - opcode_i_0) % 4; + if (var < lessThan) + return; + + var += delta; + if (var < 4) + ci.writeByte(opcode + delta, index); + else { + opcode = (opcode - opcode_i_0) / 4 + opcode_i; + if (var < 0x100) { + int pos = ci.insertExGap(1); + ci.writeByte(opcode, pos - 1); + ci.writeByte(var, pos); + } + else { + int pos = ci.insertExGap(3); + ci.writeByte(WIDE, pos - 1); + ci.writeByte(opcode, pos); + ci.write16bit(var, pos + 1); + } + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java new file mode 100644 index 0000000..7dfc316 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java @@ -0,0 +1,1604 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.util.ArrayList; + +/** + * An iterator for editing a code attribute. + * + *

To directly read or edit a bytecode sequence, call {@link #byteAt(int)}, {@link #s16bitAt(int)}, + * {@link #writeByte(int, int)}, {@link #write16bit(int, int)}, and other methods. + * For example, if method refers to a CtMethod object, + * the following code substitutes the NOP instruction for the first + * instruction of the method: + * + * 

+ * CodeAttribute ca = method.getMethodInfo().getCodeAttribute();
+ * CodeIterator ci = ca.iterator();
+ * ci.writeByte(Opcode.NOP, 0);
+ * + *

To visit every instruction, call {@link #next()} on a CodeIterator. + * It returns the index of the first byte of the next instruction. + * + *

If there are multiple CodeIterators referring to the + * same Code_attribute, then inserting a gap by one + * CodeIterator will break the other + * CodeIterator. + * + *

This iterator does not provide remove(). + * If a piece of code in a Code_attribute is unnecessary, + * it should be overwritten with NOP. + * + * @see CodeAttribute#iterator() + */ +public class CodeIterator implements Opcode { + protected CodeAttribute codeAttr; + protected byte[] bytecode; + protected int endPos; + protected int currentPos; + protected int mark; + + protected CodeIterator(CodeAttribute ca) { + codeAttr = ca; + bytecode = ca.getCode(); + begin(); + } + + /** + * Moves to the first instruction. + */ + public void begin() { + currentPos = mark = 0; + endPos = getCodeLength(); + } + + /** + * Moves to the given index. + * + *

The index of the next instruction is set to the given index. + * The successive call to next() + * returns the index that has been given to move(). + * + *

Note that the index is into the byte array returned by + * get().getCode(). + * + * @see CodeAttribute#getCode() + */ + public void move(int index) { + currentPos = index; + } + + /** + * Sets a mark to the bytecode at the given index. + * The mark can be used to track the position of that bytecode + * when code blocks are inserted. + * If a code block is inclusively inserted at the position of the + * bytecode, the mark is set to the inserted code block. + * + * @see #getMark() + * @since 3.11 + */ + public void setMark(int index) { + mark = index; + } + + /** + * Gets the index of the position of the mark set by + * setMark. + * + * @return the index of the position. + * @see #setMark(int) + * @since 3.11 + */ + public int getMark() { return mark; } + + /** + * Returns a Code attribute read with this iterator. + */ + public CodeAttribute get() { + return codeAttr; + } + + /** + * Returns code_length of Code_attribute. + */ + public int getCodeLength() { + return bytecode.length; + } + + /** + * Returns the unsigned 8bit value at the given index. + */ + public int byteAt(int index) { return bytecode[index] & 0xff; } + + /** + * Returns the signed 8bit value at the given index. + */ + public int signedByteAt(int index) { return bytecode[index]; } + + /** + * Writes an 8bit value at the given index. + */ + public void writeByte(int value, int index) { + bytecode[index] = (byte)value; + } + + /** + * Returns the unsigned 16bit value at the given index. + */ + public int u16bitAt(int index) { + return ByteArray.readU16bit(bytecode, index); + } + + /** + * Returns the signed 16bit value at the given index. + */ + public int s16bitAt(int index) { + return ByteArray.readS16bit(bytecode, index); + } + + /** + * Writes a 16 bit integer at the index. + */ + public void write16bit(int value, int index) { + ByteArray.write16bit(value, bytecode, index); + } + + /** + * Returns the signed 32bit value at the given index. + */ + public int s32bitAt(int index) { + return ByteArray.read32bit(bytecode, index); + } + + /** + * Writes a 32bit integer at the index. + */ + public void write32bit(int value, int index) { + ByteArray.write32bit(value, bytecode, index); + } + + /** + * Writes a byte array at the index. + * + * @param code may be a zero-length array. + */ + public void write(byte[] code, int index) { + int len = code.length; + for (int j = 0; j < len; ++j) + bytecode[index++] = code[j]; + } + + /** + * Returns true if there is more instructions. + */ + public boolean hasNext() { return currentPos < endPos; } + + /** + * Returns the index of the next instruction + * (not the operand following the current opcode). + * + *

Note that the index is into the byte array returned by + * get().getCode(). + * + * @see CodeAttribute#getCode() + * @see CodeIterator#byteAt(int) + */ + public int next() throws BadBytecode { + int pos = currentPos; + currentPos = nextOpcode(bytecode, pos); + return pos; + } + + /** + * Obtains the value that the next call + * to next() will return. + * + *

This method is side-effects free. + * Successive calls to lookAhead() return the + * same value until next() is called. + */ + public int lookAhead() { + return currentPos; + } + + /** + * Moves to the instruction for + * either super() or this(). + * + *

This method skips all the instructions for computing arguments + * to super() or this(), which should be + * placed at the beginning of a constructor body. + * + *

This method returns the index of INVOKESPECIAL instruction + * executing super() or this(). + * A successive call to next() returns the + * index of the next instruction following that INVOKESPECIAL. + * + *

This method works only for a constructor. + * + * @return the index of the INVOKESPECIAL instruction, or -1 + * if a constructor invocation is not found. + */ + public int skipConstructor() throws BadBytecode { + return skipSuperConstructor0(-1); + } + + /** + * Moves to the instruction for super(). + * + *

This method skips all the instructions for computing arguments to + * super(), which should be + * placed at the beginning of a constructor body. + * + *

This method returns the index of INVOKESPECIAL instruction + * executing super(). + * A successive call to next() returns the + * index of the next instruction following that INVOKESPECIAL. + * + *

This method works only for a constructor. + * + * @return the index of the INVOKESPECIAL instruction, or -1 + * if a super constructor invocation is not found + * but this() is found. + */ + public int skipSuperConstructor() throws BadBytecode { + return skipSuperConstructor0(0); + } + + /** + * Moves to the instruction for this(). + * + *

This method skips all the instructions for computing arguments to + * this(), which should be + * placed at the beginning of a constructor body. + * + *

This method returns the index of INVOKESPECIAL instruction + * executing this(). + * A successive call to next() returns the + * index of the next instruction following that INVOKESPECIAL. + * + *

This method works only for a constructor. + * + * @return the index of the INVOKESPECIAL instruction, or -1 + * if a explicit constructor invocation is not found + * but super() is found. + */ + public int skipThisConstructor() throws BadBytecode { + return skipSuperConstructor0(1); + } + + /* skipSuper 1: this(), 0: super(), -1: both. + */ + private int skipSuperConstructor0(int skipThis) throws BadBytecode { + begin(); + ConstPool cp = codeAttr.getConstPool(); + String thisClassName = codeAttr.getDeclaringClass(); + int nested = 0; + while (hasNext()) { + int index = next(); + int c = byteAt(index); + if (c == NEW) + ++nested; + else if (c == INVOKESPECIAL) { + int mref = ByteArray.readU16bit(bytecode, index + 1); + if (cp.getMethodrefName(mref).equals(MethodInfo.nameInit)) + if (--nested < 0) { + if (skipThis < 0) + return index; + + String cname = cp.getMethodrefClassName(mref); + if (cname.equals(thisClassName) == (skipThis > 0)) + return index; + else + break; + } + } + } + + begin(); + return -1; + } + + /** + * Inserts the given bytecode sequence + * before the next instruction that would be returned by + * next() (not before the instruction returned + * by the last call to next()). + * Branch offsets and the exception table are also updated. + * + *

If the next instruction is at the beginning of a block statement, + * then the bytecode is inserted within that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + * @param code inserted bytecode sequence. + * @return the index indicating the first byte of the + * inserted byte sequence. + */ + public int insert(byte[] code) + throws BadBytecode + { + return insert0(currentPos, code, false); + } + + /** + * Inserts the given bytecode sequence + * before the instruction at the given index pos. + * Branch offsets and the exception table are also updated. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the bytecode is inserted within that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + *

The index at which the byte sequence is actually inserted + * might be different from pos since some other bytes might be + * inserted at other positions (e.g. to change GOTO + * to GOTO_W). + * + * @param pos the index at which a byte sequence is inserted. + * @param code inserted bytecode sequence. + */ + public void insert(int pos, byte[] code) throws BadBytecode { + insert0(pos, code, false); + } + + /** + * Inserts the given bytecode sequence + * before the instruction at the given index pos. + * Branch offsets and the exception table are also updated. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the bytecode is inserted within that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + * @param pos the index at which a byte sequence is inserted. + * @param code inserted bytecode sequence. + * @return the index indicating the first byte of the + * inserted byte sequence, which might be + * different from pos. + * @since 3.11 + */ + public int insertAt(int pos, byte[] code) throws BadBytecode { + return insert0(pos, code, false); + } + + /** + * Inserts the given bytecode sequence exclusively + * before the next instruction that would be returned by + * next() (not before the instruction returned + * by tha last call to next()). + * Branch offsets and the exception table are also updated. + * + *

If the next instruction is at the beginning of a block statement, + * then the bytecode is excluded from that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + * @param code inserted bytecode sequence. + * @return the index indicating the first byte of the + * inserted byte sequence. + */ + public int insertEx(byte[] code) + throws BadBytecode + { + return insert0(currentPos, code, true); + } + + /** + * Inserts the given bytecode sequence exclusively + * before the instruction at the given index pos. + * Branch offsets and the exception table are also updated. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the bytecode is excluded from that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + *

The index at which the byte sequence is actually inserted + * might be different from pos since some other bytes might be + * inserted at other positions (e.g. to change GOTO + * to GOTO_W). + * + * @param pos the index at which a byte sequence is inserted. + * @param code inserted bytecode sequence. + */ + public void insertEx(int pos, byte[] code) throws BadBytecode { + insert0(pos, code, true); + } + + /** + * Inserts the given bytecode sequence exclusively + * before the instruction at the given index pos. + * Branch offsets and the exception table are also updated. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the bytecode is excluded from that block. + * + *

An extra gap may be inserted at the end of the inserted + * bytecode sequence for adjusting alignment if the code attribute + * includes LOOKUPSWITCH or TABLESWITCH. + * + * @param pos the index at which a byte sequence is inserted. + * @param code inserted bytecode sequence. + * @return the index indicating the first byte of the + * inserted byte sequence, which might be + * different from pos. + * @since 3.11 + */ + public int insertExAt(int pos, byte[] code) throws BadBytecode { + return insert0(pos, code, true); + } + + /** + * @return the index indicating the first byte of the + * inserted byte sequence. + */ + private int insert0(int pos, byte[] code, boolean exclusive) + throws BadBytecode + { + int len = code.length; + if (len <= 0) + return pos; + + // currentPos will change. + pos = insertGapAt(pos, len, exclusive).position; + + int p = pos; + for (int j = 0; j < len; ++j) + bytecode[p++] = code[j]; + + return pos; + } + + /** + * Inserts a gap + * before the next instruction that would be returned by + * next() (not before the instruction returned + * by the last call to next()). + * Branch offsets and the exception table are also updated. + * The inserted gap is filled with NOP. The gap length may be + * extended to a multiple of 4. + * + *

If the next instruction is at the beginning of a block statement, + * then the gap is inserted within that block. + * + * @param length gap length + * @return the index indicating the first byte of the inserted gap. + */ + public int insertGap(int length) throws BadBytecode { + return insertGapAt(currentPos, length, false).position; + } + + /** + * Inserts a gap in front of the instruction at the given + * index pos. + * Branch offsets and the exception table are also updated. + * The inserted gap is filled with NOP. The gap length may be + * extended to a multiple of 4. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the gap is inserted within that block. + * + * @param pos the index at which a gap is inserted. + * @param length gap length. + * @return the length of the inserted gap. + * It might be bigger than length. + */ + public int insertGap(int pos, int length) throws BadBytecode { + return insertGapAt(pos, length, false).length; + } + + /** + * Inserts an exclusive gap + * before the next instruction that would be returned by + * next() (not before the instruction returned + * by the last call to next()). + * Branch offsets and the exception table are also updated. + * The inserted gap is filled with NOP. The gap length may be + * extended to a multiple of 4. + * + *

If the next instruction is at the beginning of a block statement, + * then the gap is excluded from that block. + * + * @param length gap length + * @return the index indicating the first byte of the inserted gap. + */ + public int insertExGap(int length) throws BadBytecode { + return insertGapAt(currentPos, length, true).position; + } + + /** + * Inserts an exclusive gap in front of the instruction at the given + * index pos. + * Branch offsets and the exception table are also updated. + * The inserted gap is filled with NOP. The gap length may be + * extended to a multiple of 4. + * + *

If the instruction at the given index is at the beginning + * of a block statement, + * then the gap is excluded from that block. + * + * @param pos the index at which a gap is inserted. + * @param length gap length. + * @return the length of the inserted gap. + * It might be bigger than length. + */ + public int insertExGap(int pos, int length) throws BadBytecode { + return insertGapAt(pos, length, true).length; + } + + /** + * An inserted gap. + * + * @since 3.11 + */ + public static class Gap { + /** + * The position of the gap. + */ + public int position; + + /** + * The length of the gap. + */ + public int length; + } + + /** + * Inserts an inclusive or exclusive gap in front of the instruction + * at the given index pos. + * Branch offsets and the exception table in the method body + * are also updated. The inserted gap is filled with NOP. + * The gap length may be extended to a multiple of 4. + * + *

Suppose that the instruction at the given index is at the + * beginning of a block statement. If the gap is inclusive, + * then it is included within that block. If the gap is exclusive, + * then it is excluded from that block. + * + *

The index at which the gap is actually inserted + * might be different from pos since some other bytes might be + * inserted at other positions (e.g. to change GOTO + * to GOTO_W). The index is available from the Gap + * object returned by this method. + * + *

Suppose that the gap is inserted at the position of + * the next instruction that would be returned by + * next() (not the last instruction returned + * by the last call to next()). The next + * instruction returned by next() after the gap is + * inserted is still the same instruction. It is not NOP + * at the first byte of the inserted gap. + * + * @param pos the index at which a gap is inserted. + * @param length gap length. + * @param exclusive true if exclusive, otherwise false. + * @return the position and the length of the inserted gap. + * @since 3.11 + */ + public Gap insertGapAt(int pos, int length, boolean exclusive) + throws BadBytecode + { + /** + * cursorPos indicates the next bytecode whichever exclusive is + * true or false. + */ + Gap gap = new Gap(); + if (length <= 0) { + gap.position = pos; + gap.length = 0; + return gap; + } + + byte[] c; + int length2; + if (bytecode.length + length > Short.MAX_VALUE) { + // currentPos might change after calling insertGapCore0w(). + c = insertGapCore0w(bytecode, pos, length, exclusive, + get().getExceptionTable(), codeAttr, gap); + pos = gap.position; + length2 = length; // == gap.length + } + else { + int cur = currentPos; + c = insertGapCore0(bytecode, pos, length, exclusive, + get().getExceptionTable(), codeAttr); + // insertGapCore0() never changes pos. + length2 = c.length - bytecode.length; + gap.position = pos; + gap.length = length2; + if (cur >= pos) + currentPos = cur + length2; + + if (mark > pos || (mark == pos && exclusive)) + mark += length2; + } + + codeAttr.setCode(c); + bytecode = c; + endPos = getCodeLength(); + updateCursors(pos, length2); + return gap; + } + + /** + * Is called when a gap is inserted. The default implementation is empty. + * A subclass can override this method so that cursors will be updated. + * + * @param pos the position where a gap is inserted. + * @param length the length of the gap. + */ + protected void updateCursors(int pos, int length) { + // empty + } + + /** + * Copies and inserts the entries in the given exception table + * at the beginning of the exception table in the code attribute + * edited by this object. + * + * @param offset the value added to the code positions included + * in the entries. + */ + public void insert(ExceptionTable et, int offset) { + codeAttr.getExceptionTable().add(0, et, offset); + } + + /** + * Appends the given bytecode sequence at the end. + * + * @param code the bytecode appended. + * @return the position of the first byte of the appended bytecode. + */ + public int append(byte[] code) { + int size = getCodeLength(); + int len = code.length; + if (len <= 0) + return size; + + appendGap(len); + byte[] dest = bytecode; + for (int i = 0; i < len; ++i) + dest[i + size] = code[i]; + + return size; + } + + /** + * Appends a gap at the end of the bytecode sequence. + * + * @param gapLength gap length + */ + public void appendGap(int gapLength) { + byte[] code = bytecode; + int codeLength = code.length; + byte[] newcode = new byte[codeLength + gapLength]; + + int i; + for (i = 0; i < codeLength; ++i) + newcode[i] = code[i]; + + for (i = codeLength; i < codeLength + gapLength; ++i) + newcode[i] = NOP; + + codeAttr.setCode(newcode); + bytecode = newcode; + endPos = getCodeLength(); + } + + /** + * Copies and appends the entries in the given exception table + * at the end of the exception table in the code attribute + * edited by this object. + * + * @param offset the value added to the code positions included + * in the entries. + */ + public void append(ExceptionTable et, int offset) { + ExceptionTable table = codeAttr.getExceptionTable(); + table.add(table.size(), et, offset); + } + + /* opcodeLegth is used for implementing nextOpcode(). + */ + private static final int opcodeLength[] = { + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 2, 3, + 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 0, 0, 1, 1, 1, 1, 1, 1, 3, 3, + 3, 3, 3, 3, 3, 5, 5, 3, 2, 3, 1, 1, 3, 3, 1, 1, 0, 4, 3, 3, + 5, 5 + }; + // 0 .. LOOKUPSWITCH, TABLESWITCH, WIDE + + /** + * Calculates the index of the next opcode. + */ + static int nextOpcode(byte[] code, int index) + throws BadBytecode + { + int opcode; + try { + opcode = code[index] & 0xff; + } + catch (IndexOutOfBoundsException e) { + throw new BadBytecode("invalid opcode address"); + } + + try { + int len = opcodeLength[opcode]; + if (len > 0) + return index + len; + else if (opcode == WIDE) + if (code[index + 1] == (byte)IINC) // WIDE IINC + return index + 6; + else + return index + 4; // WIDE ... + else { + int index2 = (index & ~3) + 8; + if (opcode == LOOKUPSWITCH) { + int npairs = ByteArray.read32bit(code, index2); + return index2 + npairs * 8 + 4; + } + else if (opcode == TABLESWITCH) { + int low = ByteArray.read32bit(code, index2); + int high = ByteArray.read32bit(code, index2 + 4); + return index2 + (high - low + 1) * 4 + 8; + } + // else + // throw new BadBytecode(opcode); + } + } + catch (IndexOutOfBoundsException e) { + } + + // opcode is UNUSED or an IndexOutOfBoundsException was thrown. + throw new BadBytecode(opcode); + } + + // methods for implementing insertGap(). + + static class AlignmentException extends Exception {} + + /** + * insertGapCore0() inserts a gap (some NOPs). + * It cannot handle a long code sequence more than 32K. All branch offsets must be + * signed 16bits. + * + * If "where" is the beginning of a block statement and exclusive is false, + * then the inserted gap is also included in the block statement. + * "where" must indicate the first byte of an opcode. + * The inserted gap is filled with NOP. gapLength may be extended to + * a multiple of 4. + * + * This method was also called from CodeAttribute.LdcEntry.doit(). + * + * @param where It must indicate the first byte of an opcode. + */ + static byte[] insertGapCore0(byte[] code, int where, int gapLength, + boolean exclusive, ExceptionTable etable, CodeAttribute ca) + throws BadBytecode + { + if (gapLength <= 0) + return code; + + try { + return insertGapCore1(code, where, gapLength, exclusive, etable, ca); + } + catch (AlignmentException e) { + try { + return insertGapCore1(code, where, (gapLength + 3) & ~3, + exclusive, etable, ca); + } + catch (AlignmentException e2) { + throw new RuntimeException("fatal error?"); + } + } + } + + private static byte[] insertGapCore1(byte[] code, int where, int gapLength, + boolean exclusive, ExceptionTable etable, + CodeAttribute ca) + throws BadBytecode, AlignmentException + { + int codeLength = code.length; + byte[] newcode = new byte[codeLength + gapLength]; + insertGap2(code, where, gapLength, codeLength, newcode, exclusive); + etable.shiftPc(where, gapLength, exclusive); + LineNumberAttribute na + = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); + if (na != null) + na.shiftPc(where, gapLength, exclusive); + + LocalVariableAttribute va = (LocalVariableAttribute)ca.getAttribute( + LocalVariableAttribute.tag); + if (va != null) + va.shiftPc(where, gapLength, exclusive); + + LocalVariableAttribute vta + = (LocalVariableAttribute)ca.getAttribute( + LocalVariableAttribute.typeTag); + if (vta != null) + vta.shiftPc(where, gapLength, exclusive); + + StackMapTable smt = (StackMapTable)ca.getAttribute(StackMapTable.tag); + if (smt != null) + smt.shiftPc(where, gapLength, exclusive); + + StackMap sm = (StackMap)ca.getAttribute(StackMap.tag); + if (sm != null) + sm.shiftPc(where, gapLength, exclusive); + + return newcode; + } + + private static void insertGap2(byte[] code, int where, int gapLength, + int endPos, byte[] newcode, boolean exclusive) + throws BadBytecode, AlignmentException + { + int nextPos; + int i = 0; + int j = 0; + for (; i < endPos; i = nextPos) { + if (i == where) { + int j2 = j + gapLength; + while (j < j2) + newcode[j++] = NOP; + } + + nextPos = nextOpcode(code, i); + int inst = code[i] & 0xff; + // if, if_icmp, if_acmp, goto, jsr + if ((153 <= inst && inst <= 168) + || inst == IFNULL || inst == IFNONNULL) { + /* 2bytes *signed* offset */ + int offset = (code[i + 1] << 8) | (code[i + 2] & 0xff); + offset = newOffset(i, offset, where, gapLength, exclusive); + newcode[j] = code[i]; + ByteArray.write16bit(offset, newcode, j + 1); + j += 3; + } + else if (inst == GOTO_W || inst == JSR_W) { + /* 4bytes offset */ + int offset = ByteArray.read32bit(code, i + 1); + offset = newOffset(i, offset, where, gapLength, exclusive); + newcode[j++] = code[i]; + ByteArray.write32bit(offset, newcode, j); + j += 4; + } + else if (inst == TABLESWITCH) { + if (i != j && (gapLength & 3) != 0) + throw new AlignmentException(); + + int i2 = (i & ~3) + 4; // 0-3 byte padding + // IBM JVM 1.4.2 cannot run the following code: + // int i0 = i; + // while (i0 < i2) + // newcode[j++] = code[i0++]; + // So extracting this code into an external method. + // see JIRA JASSIST-74. + j = copyGapBytes(newcode, j, code, i, i2); + + int defaultbyte = newOffset(i, ByteArray.read32bit(code, i2), + where, gapLength, exclusive); + ByteArray.write32bit(defaultbyte, newcode, j); + int lowbyte = ByteArray.read32bit(code, i2 + 4); + ByteArray.write32bit(lowbyte, newcode, j + 4); + int highbyte = ByteArray.read32bit(code, i2 + 8); + ByteArray.write32bit(highbyte, newcode, j + 8); + j += 12; + int i0 = i2 + 12; + i2 = i0 + (highbyte - lowbyte + 1) * 4; + while (i0 < i2) { + int offset = newOffset(i, ByteArray.read32bit(code, i0), + where, gapLength, exclusive); + ByteArray.write32bit(offset, newcode, j); + j += 4; + i0 += 4; + } + } + else if (inst == LOOKUPSWITCH) { + if (i != j && (gapLength & 3) != 0) + throw new AlignmentException(); + + int i2 = (i & ~3) + 4; // 0-3 byte padding + + // IBM JVM 1.4.2 cannot run the following code: + // int i0 = i; + // while (i0 < i2) + // newcode[j++] = code[i0++]; + // So extracting this code into an external method. + // see JIRA JASSIST-74. + j = copyGapBytes(newcode, j, code, i, i2); + + int defaultbyte = newOffset(i, ByteArray.read32bit(code, i2), + where, gapLength, exclusive); + ByteArray.write32bit(defaultbyte, newcode, j); + int npairs = ByteArray.read32bit(code, i2 + 4); + ByteArray.write32bit(npairs, newcode, j + 4); + j += 8; + int i0 = i2 + 8; + i2 = i0 + npairs * 8; + while (i0 < i2) { + ByteArray.copy32bit(code, i0, newcode, j); + int offset = newOffset(i, + ByteArray.read32bit(code, i0 + 4), + where, gapLength, exclusive); + ByteArray.write32bit(offset, newcode, j + 4); + j += 8; + i0 += 8; + } + } + else + while (i < nextPos) + newcode[j++] = code[i++]; + } + } + + + private static int copyGapBytes(byte[] newcode, int j, byte[] code, int i, int iEnd) { + switch (iEnd - i) { + case 4: + newcode[j++] = code[i++]; + case 3: + newcode[j++] = code[i++]; + case 2: + newcode[j++] = code[i++]; + case 1: + newcode[j++] = code[i++]; + default: + } + + return j; + } + + private static int newOffset(int i, int offset, int where, + int gapLength, boolean exclusive) { + int target = i + offset; + if (i < where) { + if (where < target || (exclusive && where == target)) + offset += gapLength; + } + else if (i == where) { + // This code is different from the code in Branch#shiftOffset(). + // see JASSIST-124. + if (target < where) + offset -= gapLength; + } + else + if (target < where || (!exclusive && where == target)) + offset -= gapLength; + + return offset; + } + + static class Pointers { + int cursor; + int mark0, mark; + ExceptionTable etable; + LineNumberAttribute line; + LocalVariableAttribute vars, types; + StackMapTable stack; + StackMap stack2; + + Pointers(int cur, int m, int m0, ExceptionTable et, CodeAttribute ca) { + cursor = cur; + mark = m; + mark0 = m0; + etable = et; // non null + line = (LineNumberAttribute)ca.getAttribute(LineNumberAttribute.tag); + vars = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.tag); + types = (LocalVariableAttribute)ca.getAttribute(LocalVariableAttribute.typeTag); + stack = (StackMapTable)ca.getAttribute(StackMapTable.tag); + stack2 = (StackMap)ca.getAttribute(StackMap.tag); + } + + void shiftPc(int where, int gapLength, boolean exclusive) throws BadBytecode { + if (where < cursor || (where == cursor && exclusive)) + cursor += gapLength; + + if (where < mark || (where == mark && exclusive)) + mark += gapLength; + + if (where < mark0 || (where == mark0 && exclusive)) + mark0 += gapLength; + + etable.shiftPc(where, gapLength, exclusive); + if (line != null) + line.shiftPc(where, gapLength, exclusive); + + if (vars != null) + vars.shiftPc(where, gapLength, exclusive); + + if (types != null) + types.shiftPc(where, gapLength, exclusive); + + if (stack != null) + stack.shiftPc(where, gapLength, exclusive); + + if (stack2 != null) + stack2.shiftPc(where, gapLength, exclusive); + } + + void shiftForSwitch(int where, int gapLength) throws BadBytecode { + if (stack != null) + stack.shiftForSwitch(where, gapLength); + + if (stack2 != null) + stack2.shiftForSwitch(where, gapLength); + } + } + + /* + * This method is called from CodeAttribute.LdcEntry.doit(). + */ + static byte[] changeLdcToLdcW(byte[] code, ExceptionTable etable, + CodeAttribute ca, CodeAttribute.LdcEntry ldcs) + throws BadBytecode + { + Pointers pointers = new Pointers(0, 0, 0, etable, ca); + ArrayList jumps = makeJumpList(code, code.length, pointers); + while (ldcs != null) { + addLdcW(ldcs, jumps); + ldcs = ldcs.next; + } + + byte[] r = insertGap2w(code, 0, 0, false, jumps, pointers); + return r; + } + + private static void addLdcW(CodeAttribute.LdcEntry ldcs, ArrayList jumps) { + int where = ldcs.where; + LdcW ldcw = new LdcW(where, ldcs.index); + int s = jumps.size(); + for (int i = 0; i < s; i++) + if (where < ((Branch)jumps.get(i)).orgPos) { + jumps.add(i, ldcw); + return; + } + + jumps.add(ldcw); + } + + /* + * insertGapCore0w() can handle a long code sequence more than 32K. + * It guarantees that the length of the inserted gap (NOPs) is equal to + * gapLength. No other NOPs except some NOPs following TABLESWITCH or + * LOOKUPSWITCH will not be inserted. + * + * Note: currentPos might be moved. + * + * @param where It must indicate the first byte of an opcode. + * @param newWhere It contains the updated index of the position where a gap + * is inserted and the length of the gap. + * It must not be null. + */ + private byte[] insertGapCore0w(byte[] code, int where, int gapLength, boolean exclusive, + ExceptionTable etable, CodeAttribute ca, Gap newWhere) + throws BadBytecode + { + if (gapLength <= 0) + return code; + + Pointers pointers = new Pointers(currentPos, mark, where, etable, ca); + ArrayList jumps = makeJumpList(code, code.length, pointers); + byte[] r = insertGap2w(code, where, gapLength, exclusive, jumps, pointers); + currentPos = pointers.cursor; + mark = pointers.mark; + int where2 = pointers.mark0; + if (where2 == currentPos && !exclusive) + currentPos += gapLength; + + if (exclusive) + where2 -= gapLength; + + newWhere.position = where2; + newWhere.length = gapLength; + return r; + } + + private static byte[] insertGap2w(byte[] code, int where, int gapLength, + boolean exclusive, ArrayList jumps, Pointers ptrs) + throws BadBytecode + { + int n = jumps.size(); + if (gapLength > 0) { + ptrs.shiftPc(where, gapLength, exclusive); + for (int i = 0; i < n; i++) + ((Branch)jumps.get(i)).shift(where, gapLength, exclusive); + } + + boolean unstable = true; + do { + while (unstable) { + unstable = false; + for (int i = 0; i < n; i++) { + Branch b = (Branch)jumps.get(i); + if (b.expanded()) { + unstable = true; + int p = b.pos; + int delta = b.deltaSize(); + ptrs.shiftPc(p, delta, false); + for (int j = 0; j < n; j++) + ((Branch)jumps.get(j)).shift(p, delta, false); + } + } + } + + for (int i = 0; i < n; i++) { + Branch b = (Branch)jumps.get(i); + int diff = b.gapChanged(); + if (diff > 0) { + unstable = true; + int p = b.pos; + ptrs.shiftPc(p, diff, false); + for (int j = 0; j < n; j++) + ((Branch)jumps.get(j)).shift(p, diff, false); + } + } + } while (unstable); + + return makeExapndedCode(code, jumps, where, gapLength); + } + + private static ArrayList makeJumpList(byte[] code, int endPos, Pointers ptrs) + throws BadBytecode + { + ArrayList jumps = new ArrayList(); + int nextPos; + for (int i = 0; i < endPos; i = nextPos) { + nextPos = nextOpcode(code, i); + int inst = code[i] & 0xff; + // if, if_icmp, if_acmp, goto, jsr + if ((153 <= inst && inst <= 168) + || inst == IFNULL || inst == IFNONNULL) { + /* 2bytes *signed* offset */ + int offset = (code[i + 1] << 8) | (code[i + 2] & 0xff); + Branch b; + if (inst == GOTO || inst == JSR) + b = new Jump16(i, offset); + else + b = new If16(i, offset); + + jumps.add(b); + } + else if (inst == GOTO_W || inst == JSR_W) { + /* 4bytes offset */ + int offset = ByteArray.read32bit(code, i + 1); + jumps.add(new Jump32(i, offset)); + } + else if (inst == TABLESWITCH) { + int i2 = (i & ~3) + 4; // 0-3 byte padding + int defaultbyte = ByteArray.read32bit(code, i2); + int lowbyte = ByteArray.read32bit(code, i2 + 4); + int highbyte = ByteArray.read32bit(code, i2 + 8); + int i0 = i2 + 12; + int size = highbyte - lowbyte + 1; + int[] offsets = new int[size]; + for (int j = 0; j < size; j++) { + offsets[j] = ByteArray.read32bit(code, i0); + i0 += 4; + } + + jumps.add(new Table(i, defaultbyte, lowbyte, highbyte, offsets, ptrs)); + } + else if (inst == LOOKUPSWITCH) { + int i2 = (i & ~3) + 4; // 0-3 byte padding + int defaultbyte = ByteArray.read32bit(code, i2); + int npairs = ByteArray.read32bit(code, i2 + 4); + int i0 = i2 + 8; + int[] matches = new int[npairs]; + int[] offsets = new int[npairs]; + for (int j = 0; j < npairs; j++) { + matches[j] = ByteArray.read32bit(code, i0); + offsets[j] = ByteArray.read32bit(code, i0 + 4); + i0 += 8; + } + + jumps.add(new Lookup(i, defaultbyte, matches, offsets, ptrs)); + } + } + + return jumps; + } + + private static byte[] makeExapndedCode(byte[] code, ArrayList jumps, + int where, int gapLength) + throws BadBytecode + { + int n = jumps.size(); + int size = code.length + gapLength; + for (int i = 0; i < n; i++) { + Branch b = (Branch)jumps.get(i); + size += b.deltaSize(); + } + + byte[] newcode = new byte[size]; + int src = 0, dest = 0, bindex = 0; + int len = code.length; + Branch b; + int bpos; + if (0 < n) { + b = (Branch)jumps.get(0); + bpos = b.orgPos; + } + else { + b = null; + bpos = len; // src will be never equal to bpos + } + + while (src < len) { + if (src == where) { + int pos2 = dest + gapLength; + while (dest < pos2) + newcode[dest++] = NOP; + } + + if (src != bpos) + newcode[dest++] = code[src++]; + else { + int s = b.write(src, code, dest, newcode); + src += s; + dest += s + b.deltaSize(); + if (++bindex < n) { + b = (Branch)jumps.get(bindex); + bpos = b.orgPos; + } + else { + b = null; + bpos = len; + } + } + } + + return newcode; + } + + static abstract class Branch { + int pos, orgPos; + Branch(int p) { pos = orgPos = p; } + void shift(int where, int gapLength, boolean exclusive) { + if (where < pos || (where == pos && exclusive)) + pos += gapLength; + } + + static int shiftOffset(int i, int offset, int where, + int gapLength, boolean exclusive) { + int target = i + offset; + if (i < where) { + if (where < target || (exclusive && where == target)) + offset += gapLength; + } + else if (i == where) { + // This code is different from the code in CodeIterator#newOffset(). + // see JASSIST-124. + if (target < where && exclusive) + offset -= gapLength; + else if (where < target && !exclusive) + offset += gapLength; + } + else + if (target < where || (!exclusive && where == target)) + offset -= gapLength; + + return offset; + } + + boolean expanded() { return false; } + int gapChanged() { return 0; } + int deltaSize() { return 0; } // newSize - oldSize + + // This returns the original instruction size. + abstract int write(int srcPos, byte[] code, int destPos, byte[] newcode) throws BadBytecode; + } + + /* used by changeLdcToLdcW() and CodeAttribute.LdcEntry. + */ + static class LdcW extends Branch { + int index; + boolean state; + LdcW(int p, int i) { + super(p); + index = i; + state = true; + } + + boolean expanded() { + if (state) { + state = false; + return true; + } + else + return false; + } + + int deltaSize() { return 1; } + + int write(int srcPos, byte[] code, int destPos, byte[] newcode) { + newcode[destPos] = LDC_W; + ByteArray.write16bit(index, newcode, destPos + 1); + return 2; + } + } + + static abstract class Branch16 extends Branch { + int offset; + int state; + static final int BIT16 = 0; + static final int EXPAND = 1; + static final int BIT32 = 2; + + Branch16(int p, int off) { + super(p); + offset = off; + state = BIT16; + } + + void shift(int where, int gapLength, boolean exclusive) { + offset = shiftOffset(pos, offset, where, gapLength, exclusive); + super.shift(where, gapLength, exclusive); + if (state == BIT16) + if (offset < Short.MIN_VALUE || Short.MAX_VALUE < offset) + state = EXPAND; + } + + boolean expanded() { + if (state == EXPAND) { + state = BIT32; + return true; + } + else + return false; + } + + abstract int deltaSize(); + abstract void write32(int src, byte[] code, int dest, byte[] newcode); + + int write(int src, byte[] code, int dest, byte[] newcode) { + if (state == BIT32) + write32(src, code, dest, newcode); + else { + newcode[dest] = code[src]; + ByteArray.write16bit(offset, newcode, dest + 1); + } + + return 3; + } + } + + // GOTO or JSR + static class Jump16 extends Branch16 { + Jump16(int p, int off) { + super(p, off); + } + + int deltaSize() { + return state == BIT32 ? 2 : 0; + } + + void write32(int src, byte[] code, int dest, byte[] newcode) { + newcode[dest] = (byte)(((code[src] & 0xff) == GOTO) ? GOTO_W : JSR_W); + ByteArray.write32bit(offset, newcode, dest + 1); + } + } + + // if, if_icmp, or if_acmp + static class If16 extends Branch16 { + If16(int p, int off) { + super(p, off); + } + + int deltaSize() { + return state == BIT32 ? 5 : 0; + } + + void write32(int src, byte[] code, int dest, byte[] newcode) { + newcode[dest] = (byte)opcode(code[src] & 0xff); + newcode[dest + 1] = 0; + newcode[dest + 2] = 8; // branch_offset = 8 + newcode[dest + 3] = (byte)GOTO_W; + ByteArray.write32bit(offset - 3, newcode, dest + 4); + } + + int opcode(int op) { + if (op == IFNULL) + return IFNONNULL; + else if (op == IFNONNULL) + return IFNULL; + else { + if (((op - IFEQ) & 1) == 0) + return op + 1; + else + return op - 1; + } + } + } + + static class Jump32 extends Branch { + int offset; + + Jump32(int p, int off) { + super(p); + offset = off; + } + + void shift(int where, int gapLength, boolean exclusive) { + offset = shiftOffset(pos, offset, where, gapLength, exclusive); + super.shift(where, gapLength, exclusive); + } + + int write(int src, byte[] code, int dest, byte[] newcode) { + newcode[dest] = code[src]; + ByteArray.write32bit(offset, newcode, dest + 1); + return 5; + } + } + + static abstract class Switcher extends Branch { + int gap, defaultByte; + int[] offsets; + Pointers pointers; + + Switcher(int pos, int defaultByte, int[] offsets, Pointers ptrs) { + super(pos); + this.gap = 3 - (pos & 3); + this.defaultByte = defaultByte; + this.offsets = offsets; + this.pointers = ptrs; + } + + void shift(int where, int gapLength, boolean exclusive) { + int p = pos; + defaultByte = shiftOffset(p, defaultByte, where, gapLength, exclusive); + int num = offsets.length; + for (int i = 0; i < num; i++) + offsets[i] = shiftOffset(p, offsets[i], where, gapLength, exclusive); + + super.shift(where, gapLength, exclusive); + } + + int gapChanged() { + int newGap = 3 - (pos & 3); + if (newGap > gap) { + int diff = newGap - gap; + gap = newGap; + return diff; + } + + return 0; + } + + int deltaSize() { + return gap - (3 - (orgPos & 3)); + } + + int write(int src, byte[] code, int dest, byte[] newcode) throws BadBytecode { + int padding = 3 - (pos & 3); + int nops = gap - padding; + int bytecodeSize = 5 + (3 - (orgPos & 3)) + tableSize(); + if (nops > 0) + adjustOffsets(bytecodeSize, nops); + + newcode[dest++] = code[src]; + while (padding-- > 0) + newcode[dest++] = 0; + + ByteArray.write32bit(defaultByte, newcode, dest); + int size = write2(dest + 4, newcode); + dest += size + 4; + while (nops-- > 0) + newcode[dest++] = NOP; + + return 5 + (3 - (orgPos & 3)) + size; + } + + abstract int write2(int dest, byte[] newcode); + abstract int tableSize(); + + /* If the new bytecode size is shorter than the original, some NOPs + * are appended after this branch instruction (tableswitch or + * lookupswitch) to fill the gap. + * This method changes a branch offset to point to the first NOP + * if the offset originally points to the bytecode next to this + * branch instruction. Otherwise, the bytecode would contain + * dead code. It complicates the generation of StackMap and + * StackMapTable. + */ + void adjustOffsets(int size, int nops) throws BadBytecode { + pointers.shiftForSwitch(pos + size, nops); + if (defaultByte == size) + defaultByte -= nops; + + for (int i = 0; i < offsets.length; i++) + if (offsets[i] == size) + offsets[i] -= nops; + } + } + + static class Table extends Switcher { + int low, high; + + Table(int pos, int defaultByte, int low, int high, int[] offsets, Pointers ptrs) { + super(pos, defaultByte, offsets, ptrs); + this.low = low; + this.high = high; + } + + int write2(int dest, byte[] newcode) { + ByteArray.write32bit(low, newcode, dest); + ByteArray.write32bit(high, newcode, dest + 4); + int n = offsets.length; + dest += 8; + for (int i = 0; i < n; i++) { + ByteArray.write32bit(offsets[i], newcode, dest); + dest += 4; + } + + return 8 + 4 * n; + } + + int tableSize() { return 8 + 4 * offsets.length; } + } + + static class Lookup extends Switcher { + int[] matches; + + Lookup(int pos, int defaultByte, int[] matches, int[] offsets, Pointers ptrs) { + super(pos, defaultByte, offsets, ptrs); + this.matches = matches; + } + + int write2(int dest, byte[] newcode) { + int n = matches.length; + ByteArray.write32bit(n, newcode, dest); + dest += 4; + for (int i = 0; i < n; i++) { + ByteArray.write32bit(matches[i], newcode, dest); + ByteArray.write32bit(offsets[i], newcode, dest + 4); + dest += 8; + } + + return 4 + 8 * n; + } + + int tableSize() { return 4 + 8 * matches.length; } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java new file mode 100644 index 0000000..a7d94ae --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java @@ -0,0 +1,1995 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.PrintWriter; +import java.io.IOException; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import com.wenshuo.agent.javassist.CtClass; + +/** + * Constant pool table. + */ +public final class ConstPool { + LongVector items; + int numOfItems; + int thisClassInfo; + HashMap itemsCache; + + /** + * CONSTANT_Class + */ + public static final int CONST_Class = ClassInfo.tag; + + /** + * CONSTANT_Fieldref + */ + public static final int CONST_Fieldref = FieldrefInfo.tag; + + /** + * CONSTANT_Methodref + */ + public static final int CONST_Methodref = MethodrefInfo.tag; + + /** + * CONSTANT_InterfaceMethodref + */ + public static final int CONST_InterfaceMethodref + = InterfaceMethodrefInfo.tag; + + /** + * CONSTANT_String + */ + public static final int CONST_String = StringInfo.tag; + + /** + * CONSTANT_Integer + */ + public static final int CONST_Integer = IntegerInfo.tag; + + /** + * CONSTANT_Float + */ + public static final int CONST_Float = FloatInfo.tag; + + /** + * CONSTANT_Long + */ + public static final int CONST_Long = LongInfo.tag; + + /** + * CONSTANT_Double + */ + public static final int CONST_Double = DoubleInfo.tag; + + /** + * CONSTANT_NameAndType + */ + public static final int CONST_NameAndType = NameAndTypeInfo.tag; + + /** + * CONSTANT_Utf8 + */ + public static final int CONST_Utf8 = Utf8Info.tag; + + /** + * CONSTANT_MethodHandle + */ + public static final int CONST_MethodHandle = MethodHandleInfo.tag; + + /** + * CONSTANT_MethodHandle + */ + public static final int CONST_MethodType = MethodTypeInfo.tag; + + /** + * CONSTANT_MethodHandle + */ + public static final int CONST_InvokeDynamic = InvokeDynamicInfo.tag; + + /** + * Represents the class using this constant pool table. + */ + public static final CtClass THIS = null; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_getField = 1; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_getStatic = 2; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_putField = 3; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_putStatic = 4; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_invokeVirtual = 5; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_invokeStatic = 6; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_invokeSpecial = 7; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_newInvokeSpecial = 8; + + /** + * reference_kind of CONSTANT_MethodHandle_info. + */ + public static final int REF_invokeInterface = 9; + + /** + * Constructs a constant pool table. + * + * @param thisclass the name of the class using this constant + * pool table + */ + public ConstPool(String thisclass) { + items = new LongVector(); + itemsCache = null; + numOfItems = 0; + addItem0(null); // index 0 is reserved by the JVM. + thisClassInfo = addClassInfo(thisclass); + } + + /** + * Constructs a constant pool table from the given byte stream. + * + * @param in byte stream. + */ + public ConstPool(DataInputStream in) throws IOException { + itemsCache = null; + thisClassInfo = 0; + /* read() initializes items and numOfItems, and do addItem(null). + */ + read(in); + } + + void prune() { + itemsCache = null; + } + + /** + * Returns the number of entries in this table. + */ + public int getSize() { + return numOfItems; + } + + /** + * Returns the name of the class using this constant pool table. + */ + public String getClassName() { + return getClassInfo(thisClassInfo); + } + + /** + * Returns the index of CONSTANT_Class_info structure + * specifying the class using this constant pool table. + */ + public int getThisClassInfo() { + return thisClassInfo; + } + + void setThisClassInfo(int i) { + thisClassInfo = i; + } + + ConstInfo getItem(int n) { + return items.elementAt(n); + } + + /** + * Returns the tag field of the constant pool table + * entry at the given index. + */ + public int getTag(int index) { + return getItem(index).getTag(); + } + + /** + * Reads CONSTANT_Class_info structure + * at the given index. + * + * @return a fully-qualified class or interface name specified + * by name_index. If the type is an array + * type, this method returns an encoded name like + * [Ljava.lang.Object; (note that the separators + * are not slashes but dots). + * @see javassist.ClassPool#getCtClass(String) + */ + public String getClassInfo(int index) { + ClassInfo c = (ClassInfo)getItem(index); + if (c == null) + return null; + else + return Descriptor.toJavaName(getUtf8Info(c.name)); + } + + /** + * Reads CONSTANT_Class_info structure + * at the given index. + * + * @return the descriptor of the type specified + * by name_index. + * @see javassist.ClassPool#getCtClass(String) + * @since 3.15 + */ + public String getClassInfoByDescriptor(int index) { + ClassInfo c = (ClassInfo)getItem(index); + if (c == null) + return null; + else { + String className = getUtf8Info(c.name); + if (className.charAt(0) == '[') + return className; + else + return Descriptor.of(className); + } + } + + /** + * Reads the name_index field of the + * CONSTANT_NameAndType_info structure + * at the given index. + */ + public int getNameAndTypeName(int index) { + NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index); + return ntinfo.memberName; + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_NameAndType_info structure + * at the given index. + */ + public int getNameAndTypeDescriptor(int index) { + NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index); + return ntinfo.typeDescriptor; + } + + /** + * Reads the class_index field of the + * CONSTANT_Fieldref_info, + * CONSTANT_Methodref_info, + * or CONSTANT_Interfaceref_info, + * structure at the given index. + * + * @since 3.6 + */ + public int getMemberClass(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.classIndex; + } + + /** + * Reads the name_and_type_index field of the + * CONSTANT_Fieldref_info, + * CONSTANT_Methodref_info, + * or CONSTANT_Interfaceref_info, + * structure at the given index. + * + * @since 3.6 + */ + public int getMemberNameAndType(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.nameAndTypeIndex; + } + + /** + * Reads the class_index field of the + * CONSTANT_Fieldref_info structure + * at the given index. + */ + public int getFieldrefClass(int index) { + FieldrefInfo finfo = (FieldrefInfo)getItem(index); + return finfo.classIndex; + } + + /** + * Reads the class_index field of the + * CONSTANT_Fieldref_info structure + * at the given index. + * + * @return the name of the class at that class_index. + */ + public String getFieldrefClassName(int index) { + FieldrefInfo f = (FieldrefInfo)getItem(index); + if (f == null) + return null; + else + return getClassInfo(f.classIndex); + } + + /** + * Reads the name_and_type_index field of the + * CONSTANT_Fieldref_info structure + * at the given index. + */ + public int getFieldrefNameAndType(int index) { + FieldrefInfo finfo = (FieldrefInfo)getItem(index); + return finfo.nameAndTypeIndex; + } + + /** + * Reads the name_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to a CONSTANT_Fieldref_info. + * @return the name of the field. + */ + public String getFieldrefName(int index) { + FieldrefInfo f = (FieldrefInfo)getItem(index); + if (f == null) + return null; + else { + NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.memberName); + } + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to a CONSTANT_Fieldref_info. + * @return the type descriptor of the field. + */ + public String getFieldrefType(int index) { + FieldrefInfo f = (FieldrefInfo)getItem(index); + if (f == null) + return null; + else { + NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.typeDescriptor); + } + } + + /** + * Reads the class_index field of the + * CONSTANT_Methodref_info structure + * at the given index. + */ + public int getMethodrefClass(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.classIndex; + } + + /** + * Reads the class_index field of the + * CONSTANT_Methodref_info structure + * at the given index. + * + * @return the name of the class at that class_index. + */ + public String getMethodrefClassName(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (minfo == null) + return null; + else + return getClassInfo(minfo.classIndex); + } + + /** + * Reads the name_and_type_index field of the + * CONSTANT_Methodref_info structure + * at the given index. + */ + public int getMethodrefNameAndType(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.nameAndTypeIndex; + } + + /** + * Reads the name_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to a CONSTANT_Methodref_info. + * @return the name of the method. + */ + public String getMethodrefName(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (minfo == null) + return null; + else { + NameAndTypeInfo n + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.memberName); + } + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to a CONSTANT_Methodref_info. + * @return the descriptor of the method. + */ + public String getMethodrefType(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (minfo == null) + return null; + else { + NameAndTypeInfo n + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.typeDescriptor); + } + } + + /** + * Reads the class_index field of the + * CONSTANT_InterfaceMethodref_info structure + * at the given index. + */ + public int getInterfaceMethodrefClass(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.classIndex; + } + + /** + * Reads the class_index field of the + * CONSTANT_InterfaceMethodref_info structure + * at the given index. + * + * @return the name of the class at that class_index. + */ + public String getInterfaceMethodrefClassName(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return getClassInfo(minfo.classIndex); + } + + /** + * Reads the name_and_type_index field of the + * CONSTANT_InterfaceMethodref_info structure + * at the given index. + */ + public int getInterfaceMethodrefNameAndType(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + return minfo.nameAndTypeIndex; + } + + /** + * Reads the name_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to + * a CONSTANT_InterfaceMethodref_info. + * @return the name of the method. + */ + public String getInterfaceMethodrefName(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (minfo == null) + return null; + else { + NameAndTypeInfo n + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.memberName); + } + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to + * a CONSTANT_InterfaceMethodref_info. + * @return the descriptor of the method. + */ + public String getInterfaceMethodrefType(int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (minfo == null) + return null; + else { + NameAndTypeInfo n + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if(n == null) + return null; + else + return getUtf8Info(n.typeDescriptor); + } + } + /** + * Reads CONSTANT_Integer_info, _Float_info, + * _Long_info, _Double_info, or + * _String_info structure. + * These are used with the LDC instruction. + * + * @return a String value or a wrapped primitive-type + * value. + */ + public Object getLdcValue(int index) { + ConstInfo constInfo = this.getItem(index); + Object value = null; + if (constInfo instanceof StringInfo) + value = this.getStringInfo(index); + else if (constInfo instanceof FloatInfo) + value = new Float(getFloatInfo(index)); + else if (constInfo instanceof IntegerInfo) + value = new Integer(getIntegerInfo(index)); + else if (constInfo instanceof LongInfo) + value = new Long(getLongInfo(index)); + else if (constInfo instanceof DoubleInfo) + value = new Double(getDoubleInfo(index)); + else + value = null; + + return value; + } + + /** + * Reads CONSTANT_Integer_info structure + * at the given index. + * + * @return the value specified by this entry. + */ + public int getIntegerInfo(int index) { + IntegerInfo i = (IntegerInfo)getItem(index); + return i.value; + } + + /** + * Reads CONSTANT_Float_info structure + * at the given index. + * + * @return the value specified by this entry. + */ + public float getFloatInfo(int index) { + FloatInfo i = (FloatInfo)getItem(index); + return i.value; + } + + /** + * Reads CONSTANT_Long_info structure + * at the given index. + * + * @return the value specified by this entry. + */ + public long getLongInfo(int index) { + LongInfo i = (LongInfo)getItem(index); + return i.value; + } + + /** + * Reads CONSTANT_Double_info structure + * at the given index. + * + * @return the value specified by this entry. + */ + public double getDoubleInfo(int index) { + DoubleInfo i = (DoubleInfo)getItem(index); + return i.value; + } + + /** + * Reads CONSTANT_String_info structure + * at the given index. + * + * @return the string specified by string_index. + */ + public String getStringInfo(int index) { + StringInfo si = (StringInfo)getItem(index); + return getUtf8Info(si.string); + } + + /** + * Reads CONSTANT_utf8_info structure + * at the given index. + * + * @return the string specified by this entry. + */ + public String getUtf8Info(int index) { + Utf8Info utf = (Utf8Info)getItem(index); + return utf.string; + } + + /** + * Reads the reference_kind field of the + * CONSTANT_MethodHandle_info structure + * at the given index. + * + * @see #REF_getField + * @see #REF_getStatic + * @see #REF_invokeInterface + * @see #REF_invokeSpecial + * @see #REF_invokeStatic + * @see #REF_invokeVirtual + * @see #REF_newInvokeSpecial + * @see #REF_putField + * @see #REF_putStatic + * @since 3.17 + */ + public int getMethodHandleKind(int index) { + MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index); + return mhinfo.refKind; + } + + /** + * Reads the reference_index field of the + * CONSTANT_MethodHandle_info structure + * at the given index. + * + * @since 3.17 + */ + public int getMethodHandleIndex(int index) { + MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index); + return mhinfo.refIndex; + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_MethodType_info structure + * at the given index. + * + * @since 3.17 + */ + public int getMethodTypeInfo(int index) { + MethodTypeInfo mtinfo = (MethodTypeInfo)getItem(index); + return mtinfo.descriptor; + } + + /** + * Reads the bootstrap_method_attr_index field of the + * CONSTANT_InvokeDynamic_info structure + * at the given index. + * + * @since 3.17 + */ + public int getInvokeDynamicBootstrap(int index) { + InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); + return iv.bootstrap; + } + + /** + * Reads the name_and_type_index field of the + * CONSTANT_InvokeDynamic_info structure + * at the given index. + * + * @since 3.17 + */ + public int getInvokeDynamicNameAndType(int index) { + InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); + return iv.nameAndType; + } + + /** + * Reads the descriptor_index field of the + * CONSTANT_NameAndType_info structure + * indirectly specified by the given index. + * + * @param index an index to a CONSTANT_InvokeDynamic_info. + * @return the descriptor of the method. + * @since 3.17 + */ + public String getInvokeDynamicType(int index) { + InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index); + if (iv == null) + return null; + else { + NameAndTypeInfo n = (NameAndTypeInfo)getItem(iv.nameAndType); + if(n == null) + return null; + else + return getUtf8Info(n.typeDescriptor); + } + } + + /** + * Determines whether CONSTANT_Methodref_info + * structure at the given index represents the constructor + * of the given class. + * + * @return the descriptor_index specifying + * the type descriptor of the that constructor. + * If it is not that constructor, + * isConstructor() returns 0. + */ + public int isConstructor(String classname, int index) { + return isMember(classname, MethodInfo.nameInit, index); + } + + /** + * Determines whether CONSTANT_Methodref_info, + * CONSTANT_Fieldref_info, or + * CONSTANT_InterfaceMethodref_info structure + * at the given index represents the member with the specified + * name and declaring class. + * + * @param classname the class declaring the member + * @param membername the member name + * @param index the index into the constant pool table + * + * @return the descriptor_index specifying + * the type descriptor of that member. + * If it is not that member, + * isMember() returns 0. + */ + public int isMember(String classname, String membername, int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + if (getClassInfo(minfo.classIndex).equals(classname)) { + NameAndTypeInfo ntinfo + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if (getUtf8Info(ntinfo.memberName).equals(membername)) + return ntinfo.typeDescriptor; + } + + return 0; // false + } + + /** + * Determines whether CONSTANT_Methodref_info, + * CONSTANT_Fieldref_info, or + * CONSTANT_InterfaceMethodref_info structure + * at the given index has the name and the descriptor + * given as the arguments. + * + * @param membername the member name + * @param desc the descriptor of the member. + * @param index the index into the constant pool table + * + * @return the name of the target class specified by + * the ..._info structure + * at index. + * Otherwise, null if that structure does not + * match the given member name and descriptor. + */ + public String eqMember(String membername, String desc, int index) { + MemberrefInfo minfo = (MemberrefInfo)getItem(index); + NameAndTypeInfo ntinfo + = (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex); + if (getUtf8Info(ntinfo.memberName).equals(membername) + && getUtf8Info(ntinfo.typeDescriptor).equals(desc)) + return getClassInfo(minfo.classIndex); + else + return null; // false + } + + private int addItem0(ConstInfo info) { + items.addElement(info); + return numOfItems++; + } + + private int addItem(ConstInfo info) { + if (itemsCache == null) + itemsCache = makeItemsCache(items); + + ConstInfo found = (ConstInfo)itemsCache.get(info); + if (found != null) + return found.index; + else { + items.addElement(info); + itemsCache.put(info, info); + return numOfItems++; + } + } + + /** + * Copies the n-th item in this ConstPool object into the destination + * ConstPool object. + * The class names that the item refers to are renamed according + * to the given map. + * + * @param n the n-th item + * @param dest destination constant pool table + * @param classnames the map or null. + * @return the index of the copied item into the destination ClassPool. + */ + public int copy(int n, ConstPool dest, Map classnames) { + if (n == 0) + return 0; + + ConstInfo info = getItem(n); + return info.copy(this, dest, classnames); + } + + int addConstInfoPadding() { + return addItem0(new ConstInfoPadding(numOfItems)); + } + + /** + * Adds a new CONSTANT_Class_info structure. + * + *

This also adds a CONSTANT_Utf8_info structure + * for storing the class name. + * + * @return the index of the added entry. + */ + public int addClassInfo(CtClass c) { + if (c == THIS) + return thisClassInfo; + else if (!c.isArray()) + return addClassInfo(c.getName()); + else { + // an array type is recorded in the hashtable with + // the key "[L;" instead of "". + // + // note: toJvmName(toJvmName(c)) is equal to toJvmName(c). + + return addClassInfo(Descriptor.toJvmName(c)); + } + } + + /** + * Adds a new CONSTANT_Class_info structure. + * + *

This also adds a CONSTANT_Utf8_info structure + * for storing the class name. + * + * @param qname a fully-qualified class name + * (or the JVM-internal representation of that name). + * @return the index of the added entry. + */ + public int addClassInfo(String qname) { + int utf8 = addUtf8Info(Descriptor.toJvmName(qname)); + return addItem(new ClassInfo(utf8, numOfItems)); + } + + /** + * Adds a new CONSTANT_NameAndType_info structure. + * + *

This also adds CONSTANT_Utf8_info structures. + * + * @param name name_index + * @param type descriptor_index + * @return the index of the added entry. + */ + public int addNameAndTypeInfo(String name, String type) { + return addNameAndTypeInfo(addUtf8Info(name), addUtf8Info(type)); + } + + /** + * Adds a new CONSTANT_NameAndType_info structure. + * + * @param name name_index + * @param type descriptor_index + * @return the index of the added entry. + */ + public int addNameAndTypeInfo(int name, int type) { + return addItem(new NameAndTypeInfo(name, type, numOfItems)); + } + + /** + * Adds a new CONSTANT_Fieldref_info structure. + * + *

This also adds a new CONSTANT_NameAndType_info + * structure. + * + * @param classInfo class_index + * @param name name_index + * of CONSTANT_NameAndType_info. + * @param type descriptor_index + * of CONSTANT_NameAndType_info. + * @return the index of the added entry. + */ + public int addFieldrefInfo(int classInfo, String name, String type) { + int nt = addNameAndTypeInfo(name, type); + return addFieldrefInfo(classInfo, nt); + } + + /** + * Adds a new CONSTANT_Fieldref_info structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addFieldrefInfo(int classInfo, int nameAndTypeInfo) { + return addItem(new FieldrefInfo(classInfo, nameAndTypeInfo, numOfItems)); + } + + /** + * Adds a new CONSTANT_Methodref_info structure. + * + *

This also adds a new CONSTANT_NameAndType_info + * structure. + * + * @param classInfo class_index + * @param name name_index + * of CONSTANT_NameAndType_info. + * @param type descriptor_index + * of CONSTANT_NameAndType_info. + * @return the index of the added entry. + */ + public int addMethodrefInfo(int classInfo, String name, String type) { + int nt = addNameAndTypeInfo(name, type); + return addMethodrefInfo(classInfo, nt); + } + + /** + * Adds a new CONSTANT_Methodref_info structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addMethodrefInfo(int classInfo, int nameAndTypeInfo) { + return addItem(new MethodrefInfo(classInfo, nameAndTypeInfo, numOfItems)); + } + + /** + * Adds a new CONSTANT_InterfaceMethodref_info + * structure. + * + *

This also adds a new CONSTANT_NameAndType_info + * structure. + * + * @param classInfo class_index + * @param name name_index + * of CONSTANT_NameAndType_info. + * @param type descriptor_index + * of CONSTANT_NameAndType_info. + * @return the index of the added entry. + */ + public int addInterfaceMethodrefInfo(int classInfo, String name, + String type) { + int nt = addNameAndTypeInfo(name, type); + return addInterfaceMethodrefInfo(classInfo, nt); + } + + /** + * Adds a new CONSTANT_InterfaceMethodref_info + * structure. + * + * @param classInfo class_index + * @param nameAndTypeInfo name_and_type_index. + * @return the index of the added entry. + */ + public int addInterfaceMethodrefInfo(int classInfo, + int nameAndTypeInfo) { + return addItem(new InterfaceMethodrefInfo(classInfo, nameAndTypeInfo, + numOfItems)); + } + + /** + * Adds a new CONSTANT_String_info + * structure. + * + *

This also adds a new CONSTANT_Utf8_info + * structure. + * + * @return the index of the added entry. + */ + public int addStringInfo(String str) { + int utf = addUtf8Info(str); + return addItem(new StringInfo(utf, numOfItems)); + } + + /** + * Adds a new CONSTANT_Integer_info + * structure. + * + * @return the index of the added entry. + */ + public int addIntegerInfo(int i) { + return addItem(new IntegerInfo(i, numOfItems)); + } + + /** + * Adds a new CONSTANT_Float_info + * structure. + * + * @return the index of the added entry. + */ + public int addFloatInfo(float f) { + return addItem(new FloatInfo(f, numOfItems)); + } + + /** + * Adds a new CONSTANT_Long_info + * structure. + * + * @return the index of the added entry. + */ + public int addLongInfo(long l) { + int i = addItem(new LongInfo(l, numOfItems)); + if (i == numOfItems - 1) // if not existing + addConstInfoPadding(); + + return i; + } + + /** + * Adds a new CONSTANT_Double_info + * structure. + * + * @return the index of the added entry. + */ + public int addDoubleInfo(double d) { + int i = addItem(new DoubleInfo(d, numOfItems)); + if (i == numOfItems - 1) // if not existing + addConstInfoPadding(); + + return i; + } + + /** + * Adds a new CONSTANT_Utf8_info + * structure. + * + * @return the index of the added entry. + */ + public int addUtf8Info(String utf8) { + return addItem(new Utf8Info(utf8, numOfItems)); + } + + /** + * Adds a new CONSTANT_MethodHandle_info + * structure. + * + * @param kind reference_kind + * such as {@link #REF_invokeStatic REF_invokeStatic}. + * @param index reference_index. + * @return the index of the added entry. + * + * @since 3.17 + */ + public int addMethodHandleInfo(int kind, int index) { + return addItem(new MethodHandleInfo(kind, index, numOfItems)); + } + + /** + * Adds a new CONSTANT_MethodType_info + * structure. + * + * @param desc descriptor_index. + * @return the index of the added entry. + * + * @since 3.17 + */ + public int addMethodTypeInfo(int desc) { + return addItem(new MethodTypeInfo(desc, numOfItems)); + } + + /** + * Adds a new CONSTANT_InvokeDynamic_info + * structure. + * + * @param bootstrap bootstrap_method_attr_index. + * @param nameAndType name_and_type_index. + * @return the index of the added entry. + * + * @since 3.17 + */ + public int addInvokeDynamicInfo(int bootstrap, int nameAndType) { + return addItem(new InvokeDynamicInfo(bootstrap, nameAndType, numOfItems)); + } + + /** + * Get all the class names. + * + * @return a set of class names (String objects). + */ + public Set getClassNames() { + HashSet result = new HashSet(); + LongVector v = items; + int size = numOfItems; + for (int i = 1; i < size; ++i) { + String className = v.elementAt(i).getClassName(this); + if (className != null) + result.add(className); + } + return result; + } + + /** + * Replaces all occurrences of a class name. + * + * @param oldName the replaced name (JVM-internal representation). + * @param newName the substituted name (JVM-internal representation). + */ + public void renameClass(String oldName, String newName) { + LongVector v = items; + int size = numOfItems; + for (int i = 1; i < size; ++i) { + ConstInfo ci = v.elementAt(i); + ci.renameClass(this, oldName, newName, itemsCache); + } + } + + /** + * Replaces all occurrences of class names. + * + * @param classnames specifies pairs of replaced and substituted + * name. + */ + public void renameClass(Map classnames) { + LongVector v = items; + int size = numOfItems; + for (int i = 1; i < size; ++i) { + ConstInfo ci = v.elementAt(i); + ci.renameClass(this, classnames, itemsCache); + } + } + + private void read(DataInputStream in) throws IOException { + int n = in.readUnsignedShort(); + + items = new LongVector(n); + numOfItems = 0; + addItem0(null); // index 0 is reserved by the JVM. + + while (--n > 0) { // index 0 is reserved by JVM + int tag = readOne(in); + if ((tag == LongInfo.tag) || (tag == DoubleInfo.tag)) { + addConstInfoPadding(); + --n; + } + } + } + + private static HashMap makeItemsCache(LongVector items) { + HashMap cache = new HashMap(); + int i = 1; + while (true) { + ConstInfo info = items.elementAt(i++); + if (info == null) + break; + else + cache.put(info, info); + } + + return cache; + } + + private int readOne(DataInputStream in) throws IOException { + ConstInfo info; + int tag = in.readUnsignedByte(); + switch (tag) { + case Utf8Info.tag : // 1 + info = new Utf8Info(in, numOfItems); + break; + case IntegerInfo.tag : // 3 + info = new IntegerInfo(in, numOfItems); + break; + case FloatInfo.tag : // 4 + info = new FloatInfo(in, numOfItems); + break; + case LongInfo.tag : // 5 + info = new LongInfo(in, numOfItems); + break; + case DoubleInfo.tag : // 6 + info = new DoubleInfo(in, numOfItems); + break; + case ClassInfo.tag : // 7 + info = new ClassInfo(in, numOfItems); + break; + case StringInfo.tag : // 8 + info = new StringInfo(in, numOfItems); + break; + case FieldrefInfo.tag : // 9 + info = new FieldrefInfo(in, numOfItems); + break; + case MethodrefInfo.tag : // 10 + info = new MethodrefInfo(in, numOfItems); + break; + case InterfaceMethodrefInfo.tag : // 11 + info = new InterfaceMethodrefInfo(in, numOfItems); + break; + case NameAndTypeInfo.tag : // 12 + info = new NameAndTypeInfo(in, numOfItems); + break; + case MethodHandleInfo.tag : // 15 + info = new MethodHandleInfo(in, numOfItems); + break; + case MethodTypeInfo.tag : // 16 + info = new MethodTypeInfo(in, numOfItems); + break; + case InvokeDynamicInfo.tag : // 18 + info = new InvokeDynamicInfo(in, numOfItems); + break; + default : + throw new IOException("invalid constant type: " + tag + " at " + numOfItems); + } + + addItem0(info); + return tag; + } + + /** + * Writes the contents of the constant pool table. + */ + public void write(DataOutputStream out) throws IOException { + out.writeShort(numOfItems); + LongVector v = items; + int size = numOfItems; + for (int i = 1; i < size; ++i) + v.elementAt(i).write(out); + } + + /** + * Prints the contents of the constant pool table. + */ + public void print() { + print(new PrintWriter(System.out, true)); + } + + /** + * Prints the contents of the constant pool table. + */ + public void print(PrintWriter out) { + int size = numOfItems; + for (int i = 1; i < size; ++i) { + out.print(i); + out.print(" "); + items.elementAt(i).print(out); + } + } +} + +abstract class ConstInfo { + int index; + + public ConstInfo(int i) { index = i; } + + public abstract int getTag(); + + public String getClassName(ConstPool cp) { return null; } + public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) {} + public void renameClass(ConstPool cp, Map classnames, HashMap cache) {} + public abstract int copy(ConstPool src, ConstPool dest, Map classnames); + // ** classnames is a mapping between JVM names. + + public abstract void write(DataOutputStream out) throws IOException; + public abstract void print(PrintWriter out); + + public String toString() { + ByteArrayOutputStream bout = new ByteArrayOutputStream(); + PrintWriter out = new PrintWriter(bout); + print(out); + return bout.toString(); + } +} + +/* padding following DoubleInfo or LongInfo. + */ +class ConstInfoPadding extends ConstInfo { + public ConstInfoPadding(int i) { super(i); } + + public int getTag() { return 0; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addConstInfoPadding(); + } + + public void write(DataOutputStream out) throws IOException {} + + public void print(PrintWriter out) { + out.println("padding"); + } +} + +class ClassInfo extends ConstInfo { + static final int tag = 7; + int name; + + public ClassInfo(int className, int index) { + super(index); + name = className; + } + + public ClassInfo(DataInputStream in, int index) throws IOException { + super(index); + name = in.readUnsignedShort(); + } + + public int hashCode() { return name; } + + public boolean equals(Object obj) { + return obj instanceof ClassInfo && ((ClassInfo)obj).name == name; + } + + public int getTag() { return tag; } + + public String getClassName(ConstPool cp) { + return cp.getUtf8Info(name); + } + + public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { + String nameStr = cp.getUtf8Info(name); + String newNameStr = null; + if (nameStr.equals(oldName)) + newNameStr = newName; + else if (nameStr.charAt(0) == '[') { + String s = Descriptor.rename(nameStr, oldName, newName); + if (nameStr != s) + newNameStr = s; + } + + if (newNameStr != null) + if (cache == null) + name = cp.addUtf8Info(newNameStr); + else { + cache.remove(this); + name = cp.addUtf8Info(newNameStr); + cache.put(this, this); + } + } + + public void renameClass(ConstPool cp, Map map, HashMap cache) { + String oldName = cp.getUtf8Info(name); + String newName = null; + if (oldName.charAt(0) == '[') { + String s = Descriptor.rename(oldName, map); + if (oldName != s) + newName = s; + } + else { + String s = (String)map.get(oldName); + if (s != null && !s.equals(oldName)) + newName = s; + } + + if (newName != null) { + if (cache == null) + name = cp.addUtf8Info(newName); + else { + cache.remove(this); + name = cp.addUtf8Info(newName); + cache.put(this, this); + } + } + } + + public int copy(ConstPool src, ConstPool dest, Map map) { + String classname = src.getUtf8Info(name); + if (map != null) { + String newname = (String)map.get(classname); + if (newname != null) + classname = newname; + } + + return dest.addClassInfo(classname); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeShort(name); + } + + public void print(PrintWriter out) { + out.print("Class #"); + out.println(name); + } +} + +class NameAndTypeInfo extends ConstInfo { + static final int tag = 12; + int memberName; + int typeDescriptor; + + public NameAndTypeInfo(int name, int type, int index) { + super(index); + memberName = name; + typeDescriptor = type; + } + + public NameAndTypeInfo(DataInputStream in, int index) throws IOException { + super(index); + memberName = in.readUnsignedShort(); + typeDescriptor = in.readUnsignedShort(); + } + + public int hashCode() { return (memberName << 16) ^ typeDescriptor; } + + public boolean equals(Object obj) { + if (obj instanceof NameAndTypeInfo) { + NameAndTypeInfo nti = (NameAndTypeInfo)obj; + return nti.memberName == memberName && nti.typeDescriptor == typeDescriptor; + } + else + return false; + } + + public int getTag() { return tag; } + + public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { + String type = cp.getUtf8Info(typeDescriptor); + String type2 = Descriptor.rename(type, oldName, newName); + if (type != type2) + if (cache == null) + typeDescriptor = cp.addUtf8Info(type2); + else { + cache.remove(this); + typeDescriptor = cp.addUtf8Info(type2); + cache.put(this, this); + } + } + + public void renameClass(ConstPool cp, Map map, HashMap cache) { + String type = cp.getUtf8Info(typeDescriptor); + String type2 = Descriptor.rename(type, map); + if (type != type2) + if (cache == null) + typeDescriptor = cp.addUtf8Info(type2); + else { + cache.remove(this); + typeDescriptor = cp.addUtf8Info(type2); + cache.put(this, this); + } + } + + public int copy(ConstPool src, ConstPool dest, Map map) { + String mname = src.getUtf8Info(memberName); + String tdesc = src.getUtf8Info(typeDescriptor); + tdesc = Descriptor.rename(tdesc, map); + return dest.addNameAndTypeInfo(dest.addUtf8Info(mname), + dest.addUtf8Info(tdesc)); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeShort(memberName); + out.writeShort(typeDescriptor); + } + + public void print(PrintWriter out) { + out.print("NameAndType #"); + out.print(memberName); + out.print(", type #"); + out.println(typeDescriptor); + } +} + +abstract class MemberrefInfo extends ConstInfo { + int classIndex; + int nameAndTypeIndex; + + public MemberrefInfo(int cindex, int ntindex, int thisIndex) { + super(thisIndex); + classIndex = cindex; + nameAndTypeIndex = ntindex; + } + + public MemberrefInfo(DataInputStream in, int thisIndex) throws IOException { + super(thisIndex); + classIndex = in.readUnsignedShort(); + nameAndTypeIndex = in.readUnsignedShort(); + } + + public int hashCode() { return (classIndex << 16) ^ nameAndTypeIndex; } + + public boolean equals(Object obj) { + if (obj instanceof MemberrefInfo) { + MemberrefInfo mri = (MemberrefInfo)obj; + return mri.classIndex == classIndex && mri.nameAndTypeIndex == nameAndTypeIndex + && mri.getClass() == this.getClass(); + } + else + return false; + } + + public int copy(ConstPool src, ConstPool dest, Map map) { + int classIndex2 = src.getItem(classIndex).copy(src, dest, map); + int ntIndex2 = src.getItem(nameAndTypeIndex).copy(src, dest, map); + return copy2(dest, classIndex2, ntIndex2); + } + + abstract protected int copy2(ConstPool dest, int cindex, int ntindex); + + public void write(DataOutputStream out) throws IOException { + out.writeByte(getTag()); + out.writeShort(classIndex); + out.writeShort(nameAndTypeIndex); + } + + public void print(PrintWriter out) { + out.print(getTagName() + " #"); + out.print(classIndex); + out.print(", name&type #"); + out.println(nameAndTypeIndex); + } + + public abstract String getTagName(); +} + +class FieldrefInfo extends MemberrefInfo { + static final int tag = 9; + + public FieldrefInfo(int cindex, int ntindex, int thisIndex) { + super(cindex, ntindex, thisIndex); + } + + public FieldrefInfo(DataInputStream in, int thisIndex) throws IOException { + super(in, thisIndex); + } + + public int getTag() { return tag; } + + public String getTagName() { return "Field"; } + + protected int copy2(ConstPool dest, int cindex, int ntindex) { + return dest.addFieldrefInfo(cindex, ntindex); + } +} + +class MethodrefInfo extends MemberrefInfo { + static final int tag = 10; + + public MethodrefInfo(int cindex, int ntindex, int thisIndex) { + super(cindex, ntindex, thisIndex); + } + + public MethodrefInfo(DataInputStream in, int thisIndex) throws IOException { + super(in, thisIndex); + } + + public int getTag() { return tag; } + + public String getTagName() { return "Method"; } + + protected int copy2(ConstPool dest, int cindex, int ntindex) { + return dest.addMethodrefInfo(cindex, ntindex); + } +} + +class InterfaceMethodrefInfo extends MemberrefInfo { + static final int tag = 11; + + public InterfaceMethodrefInfo(int cindex, int ntindex, int thisIndex) { + super(cindex, ntindex, thisIndex); + } + + public InterfaceMethodrefInfo(DataInputStream in, int thisIndex) throws IOException { + super(in, thisIndex); + } + + public int getTag() { return tag; } + + public String getTagName() { return "Interface"; } + + protected int copy2(ConstPool dest, int cindex, int ntindex) { + return dest.addInterfaceMethodrefInfo(cindex, ntindex); + } +} + +class StringInfo extends ConstInfo { + static final int tag = 8; + int string; + + public StringInfo(int str, int index) { + super(index); + string = str; + } + + public StringInfo(DataInputStream in, int index) throws IOException { + super(index); + string = in.readUnsignedShort(); + } + + public int hashCode() { return string; } + + public boolean equals(Object obj) { + return obj instanceof StringInfo && ((StringInfo)obj).string == string; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addStringInfo(src.getUtf8Info(string)); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeShort(string); + } + + public void print(PrintWriter out) { + out.print("String #"); + out.println(string); + } +} + +class IntegerInfo extends ConstInfo { + static final int tag = 3; + int value; + + public IntegerInfo(int v, int index) { + super(index); + value = v; + } + + public IntegerInfo(DataInputStream in, int index) throws IOException { + super(index); + value = in.readInt(); + } + + public int hashCode() { return value; } + + public boolean equals(Object obj) { + return obj instanceof IntegerInfo && ((IntegerInfo)obj).value == value; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addIntegerInfo(value); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeInt(value); + } + + public void print(PrintWriter out) { + out.print("Integer "); + out.println(value); + } +} + +class FloatInfo extends ConstInfo { + static final int tag = 4; + float value; + + public FloatInfo(float f, int index) { + super(index); + value = f; + } + + public FloatInfo(DataInputStream in, int index) throws IOException { + super(index); + value = in.readFloat(); + } + + public int hashCode() { return Float.floatToIntBits(value); } + + public boolean equals(Object obj) { + return obj instanceof FloatInfo && ((FloatInfo)obj).value == value; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addFloatInfo(value); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeFloat(value); + } + + public void print(PrintWriter out) { + out.print("Float "); + out.println(value); + } +} + +class LongInfo extends ConstInfo { + static final int tag = 5; + long value; + + public LongInfo(long l, int index) { + super(index); + value = l; + } + + public LongInfo(DataInputStream in, int index) throws IOException { + super(index); + value = in.readLong(); + } + + public int hashCode() { return (int)(value ^ (value >>> 32)); } + + public boolean equals(Object obj) { + return obj instanceof LongInfo && ((LongInfo)obj).value == value; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addLongInfo(value); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeLong(value); + } + + public void print(PrintWriter out) { + out.print("Long "); + out.println(value); + } +} + +class DoubleInfo extends ConstInfo { + static final int tag = 6; + double value; + + public DoubleInfo(double d, int index) { + super(index); + value = d; + } + + public DoubleInfo(DataInputStream in, int index) throws IOException { + super(index); + value = in.readDouble(); + } + + public int hashCode() { + long v = Double.doubleToLongBits(value); + return (int)(v ^ (v >>> 32)); + } + + public boolean equals(Object obj) { + return obj instanceof DoubleInfo && ((DoubleInfo)obj).value == value; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addDoubleInfo(value); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeDouble(value); + } + + public void print(PrintWriter out) { + out.print("Double "); + out.println(value); + } +} + +class Utf8Info extends ConstInfo { + static final int tag = 1; + String string; + + public Utf8Info(String utf8, int index) { + super(index); + string = utf8; + } + + public Utf8Info(DataInputStream in, int index) throws IOException { + super(index); + string = in.readUTF(); + } + + public int hashCode() { + return string.hashCode(); + } + + public boolean equals(Object obj) { + return obj instanceof Utf8Info && ((Utf8Info)obj).string.equals(string); + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addUtf8Info(string); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeUTF(string); + } + + public void print(PrintWriter out) { + out.print("UTF8 \""); + out.print(string); + out.println("\""); + } +} + +class MethodHandleInfo extends ConstInfo { + static final int tag = 15; + int refKind, refIndex; + + public MethodHandleInfo(int kind, int referenceIndex, int index) { + super(index); + refKind = kind; + refIndex = referenceIndex; + } + + public MethodHandleInfo(DataInputStream in, int index) throws IOException { + super(index); + refKind = in.readUnsignedByte(); + refIndex = in.readUnsignedShort(); + } + + public int hashCode() { return (refKind << 16) ^ refIndex; } + + public boolean equals(Object obj) { + if (obj instanceof MethodHandleInfo) { + MethodHandleInfo mh = (MethodHandleInfo)obj; + return mh.refKind == refKind && mh.refIndex == refIndex; + } + else + return false; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addMethodHandleInfo(refKind, + src.getItem(refIndex).copy(src, dest, map)); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeByte(refKind); + out.writeShort(refIndex); + } + + public void print(PrintWriter out) { + out.print("MethodHandle #"); + out.print(refKind); + out.print(", index #"); + out.println(refIndex); + } +} + +class MethodTypeInfo extends ConstInfo { + static final int tag = 16; + int descriptor; + + public MethodTypeInfo(int desc, int index) { + super(index); + descriptor = desc; + } + + public MethodTypeInfo(DataInputStream in, int index) throws IOException { + super(index); + descriptor = in.readUnsignedShort(); + } + + public int hashCode() { return descriptor; } + + public boolean equals(Object obj) { + if (obj instanceof MethodTypeInfo) + return ((MethodTypeInfo)obj).descriptor == descriptor; + else + return false; + } + + public int getTag() { return tag; } + + public void renameClass(ConstPool cp, String oldName, String newName, HashMap cache) { + String desc = cp.getUtf8Info(descriptor); + String desc2 = Descriptor.rename(desc, oldName, newName); + if (desc != desc2) + if (cache == null) + descriptor = cp.addUtf8Info(desc2); + else { + cache.remove(this); + descriptor = cp.addUtf8Info(desc2); + cache.put(this, this); + } + } + + public void renameClass(ConstPool cp, Map map, HashMap cache) { + String desc = cp.getUtf8Info(descriptor); + String desc2 = Descriptor.rename(desc, map); + if (desc != desc2) + if (cache == null) + descriptor = cp.addUtf8Info(desc2); + else { + cache.remove(this); + descriptor = cp.addUtf8Info(desc2); + cache.put(this, this); + } + } + + public int copy(ConstPool src, ConstPool dest, Map map) { + String desc = src.getUtf8Info(descriptor); + desc = Descriptor.rename(desc, map); + return dest.addMethodTypeInfo(dest.addUtf8Info(desc)); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeShort(descriptor); + } + + public void print(PrintWriter out) { + out.print("MethodType #"); + out.println(descriptor); + } +} + +class InvokeDynamicInfo extends ConstInfo { + static final int tag = 18; + int bootstrap, nameAndType; + + public InvokeDynamicInfo(int bootstrapMethod, int ntIndex, int index) { + super(index); + bootstrap = bootstrapMethod; + nameAndType = ntIndex; + } + + public InvokeDynamicInfo(DataInputStream in, int index) throws IOException { + super(index); + bootstrap = in.readUnsignedShort(); + nameAndType = in.readUnsignedShort(); + } + + public int hashCode() { return (bootstrap << 16) ^ nameAndType; } + + public boolean equals(Object obj) { + if (obj instanceof InvokeDynamicInfo) { + InvokeDynamicInfo iv = (InvokeDynamicInfo)obj; + return iv.bootstrap == bootstrap && iv.nameAndType == nameAndType; + } + else + return false; + } + + public int getTag() { return tag; } + + public int copy(ConstPool src, ConstPool dest, Map map) { + return dest.addInvokeDynamicInfo(bootstrap, + src.getItem(nameAndType).copy(src, dest, map)); + } + + public void write(DataOutputStream out) throws IOException { + out.writeByte(tag); + out.writeShort(bootstrap); + out.writeShort(nameAndType); + } + + public void print(PrintWriter out) { + out.print("InvokeDynamic #"); + out.print(bootstrap); + out.print(", name&type #"); + out.println(nameAndType); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java new file mode 100644 index 0000000..900ce1a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java @@ -0,0 +1,73 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.util.Map; +import java.io.IOException; + +/** + * ConstantValue_attribute. + */ +public class ConstantAttribute extends AttributeInfo { + /** + * The name of this attribute "ConstantValue". + */ + public static final String tag = "ConstantValue"; + + ConstantAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a ConstantValue attribute. + * + * @param cp a constant pool table. + * @param index constantvalue_index + * of ConstantValue_attribute. + */ + public ConstantAttribute(ConstPool cp, int index) { + super(cp, tag); + byte[] bvalue = new byte[2]; + bvalue[0] = (byte)(index >>> 8); + bvalue[1] = (byte)index; + set(bvalue); + } + + /** + * Returns constantvalue_index. + */ + public int getConstantValue() { + return ByteArray.readU16bit(get(), 0); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + int index = getConstPool().copy(getConstantValue(), newCp, + classnames); + return new ConstantAttribute(newCp, index); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java new file mode 100644 index 0000000..fdf1a7f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java @@ -0,0 +1,56 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * Deprecated_attribute. + */ +public class DeprecatedAttribute extends AttributeInfo { + /** + * The name of this attribute "Deprecated". + */ + public static final String tag = "Deprecated"; + + DeprecatedAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a Deprecated attribute. + * + * @param cp a constant pool table. + */ + public DeprecatedAttribute(ConstPool cp) { + super(cp, tag, new byte[0]); + } + + /** + * Makes a copy. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames should be null. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + return new DeprecatedAttribute(newCp); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java new file mode 100644 index 0000000..7b8f2f1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java @@ -0,0 +1,872 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtPrimitiveType; +import com.wenshuo.agent.javassist.NotFoundException; +import java.util.Map; + +/** + * A support class for dealing with descriptors. + * + *

See chapter 4.3 in "The Java Virtual Machine Specification (2nd ed.)" + */ +public class Descriptor { + /** + * Converts a class name into the internal representation used in + * the JVM. + * + *

Note that toJvmName(toJvmName(s)) is equivalent + * to toJvmName(s). + */ + public static String toJvmName(String classname) { + return classname.replace('.', '/'); + } + + /** + * Converts a class name from the internal representation used in + * the JVM to the normal one used in Java. + * This method does not deal with an array type name such as + * "[Ljava/lang/Object;" and "[I;". For such names, use + * toClassName(). + * + * @see #toClassName(String) + */ + public static String toJavaName(String classname) { + return classname.replace('/', '.'); + } + + /** + * Returns the internal representation of the class name in the + * JVM. + */ + public static String toJvmName(CtClass clazz) { + if (clazz.isArray()) + return of(clazz); + else + return toJvmName(clazz.getName()); + } + + /** + * Converts to a Java class name from a descriptor. + * + * @param descriptor type descriptor. + */ + public static String toClassName(String descriptor) { + int arrayDim = 0; + int i = 0; + char c = descriptor.charAt(0); + while (c == '[') { + ++arrayDim; + c = descriptor.charAt(++i); + } + + String name; + if (c == 'L') { + int i2 = descriptor.indexOf(';', i++); + name = descriptor.substring(i, i2).replace('/', '.'); + i = i2; + } + else if (c == 'V') + name = "void"; + else if (c == 'I') + name = "int"; + else if (c == 'B') + name = "byte"; + else if (c == 'J') + name = "long"; + else if (c == 'D') + name = "double"; + else if (c == 'F') + name = "float"; + else if (c == 'C') + name = "char"; + else if (c == 'S') + name = "short"; + else if (c == 'Z') + name = "boolean"; + else + throw new RuntimeException("bad descriptor: " + descriptor); + + if (i + 1 != descriptor.length()) + throw new RuntimeException("multiple descriptors?: " + descriptor); + + if (arrayDim == 0) + return name; + else { + StringBuffer sbuf = new StringBuffer(name); + do { + sbuf.append("[]"); + } while (--arrayDim > 0); + + return sbuf.toString(); + } + } + + /** + * Converts to a descriptor from a Java class name + */ + public static String of(String classname) { + if (classname.equals("void")) + return "V"; + else if (classname.equals("int")) + return "I"; + else if (classname.equals("byte")) + return "B"; + else if (classname.equals("long")) + return "J"; + else if (classname.equals("double")) + return "D"; + else if (classname.equals("float")) + return "F"; + else if (classname.equals("char")) + return "C"; + else if (classname.equals("short")) + return "S"; + else if (classname.equals("boolean")) + return "Z"; + else + return "L" + toJvmName(classname) + ";"; + } + + /** + * Substitutes a class name + * in the given descriptor string. + * + * @param desc descriptor string + * @param oldname replaced JVM class name + * @param newname substituted JVM class name + * + * @see Descriptor#toJvmName(String) + */ + public static String rename(String desc, String oldname, String newname) { + if (desc.indexOf(oldname) < 0) + return desc; + + StringBuffer newdesc = new StringBuffer(); + int head = 0; + int i = 0; + for (;;) { + int j = desc.indexOf('L', i); + if (j < 0) + break; + else if (desc.startsWith(oldname, j + 1) + && desc.charAt(j + oldname.length() + 1) == ';') { + newdesc.append(desc.substring(head, j)); + newdesc.append('L'); + newdesc.append(newname); + newdesc.append(';'); + head = i = j + oldname.length() + 2; + } + else { + i = desc.indexOf(';', j) + 1; + if (i < 1) + break; // ';' was not found. + } + } + + if (head == 0) + return desc; + else { + int len = desc.length(); + if (head < len) + newdesc.append(desc.substring(head, len)); + + return newdesc.toString(); + } + } + + /** + * Substitutes class names in the given descriptor string + * according to the given map. + * + * @param map a map between replaced and substituted + * JVM class names. + * @see Descriptor#toJvmName(String) + */ + public static String rename(String desc, Map map) { + if (map == null) + return desc; + + StringBuffer newdesc = new StringBuffer(); + int head = 0; + int i = 0; + for (;;) { + int j = desc.indexOf('L', i); + if (j < 0) + break; + + int k = desc.indexOf(';', j); + if (k < 0) + break; + + i = k + 1; + String name = desc.substring(j + 1, k); + String name2 = (String)map.get(name); + if (name2 != null) { + newdesc.append(desc.substring(head, j)); + newdesc.append('L'); + newdesc.append(name2); + newdesc.append(';'); + head = i; + } + } + + if (head == 0) + return desc; + else { + int len = desc.length(); + if (head < len) + newdesc.append(desc.substring(head, len)); + + return newdesc.toString(); + } + } + + /** + * Returns the descriptor representing the given type. + */ + public static String of(CtClass type) { + StringBuffer sbuf = new StringBuffer(); + toDescriptor(sbuf, type); + return sbuf.toString(); + } + + private static void toDescriptor(StringBuffer desc, CtClass type) { + if (type.isArray()) { + desc.append('['); + try { + toDescriptor(desc, type.getComponentType()); + } + catch (NotFoundException e) { + desc.append('L'); + String name = type.getName(); + desc.append(toJvmName(name.substring(0, name.length() - 2))); + desc.append(';'); + } + } + else if (type.isPrimitive()) { + CtPrimitiveType pt = (CtPrimitiveType)type; + desc.append(pt.getDescriptor()); + } + else { // class type + desc.append('L'); + desc.append(type.getName().replace('.', '/')); + desc.append(';'); + } + } + + /** + * Returns the descriptor representing a constructor receiving + * the given parameter types. + * + * @param paramTypes parameter types + */ + public static String ofConstructor(CtClass[] paramTypes) { + return ofMethod(CtClass.voidType, paramTypes); + } + + /** + * Returns the descriptor representing a method that receives + * the given parameter types and returns the given type. + * + * @param returnType return type + * @param paramTypes parameter types + */ + public static String ofMethod(CtClass returnType, CtClass[] paramTypes) { + StringBuffer desc = new StringBuffer(); + desc.append('('); + if (paramTypes != null) { + int n = paramTypes.length; + for (int i = 0; i < n; ++i) + toDescriptor(desc, paramTypes[i]); + } + + desc.append(')'); + if (returnType != null) + toDescriptor(desc, returnType); + + return desc.toString(); + } + + /** + * Returns the descriptor representing a list of parameter types. + * For example, if the given parameter types are two int, + * then this method returns "(II)". + * + * @param paramTypes parameter types + */ + public static String ofParameters(CtClass[] paramTypes) { + return ofMethod(null, paramTypes); + } + + /** + * Appends a parameter type to the parameter list represented + * by the given descriptor. + * + *

classname must not be an array type. + * + * @param classname parameter type (not primitive type) + * @param desc descriptor + */ + public static String appendParameter(String classname, String desc) { + int i = desc.indexOf(')'); + if (i < 0) + return desc; + else { + StringBuffer newdesc = new StringBuffer(); + newdesc.append(desc.substring(0, i)); + newdesc.append('L'); + newdesc.append(classname.replace('.', '/')); + newdesc.append(';'); + newdesc.append(desc.substring(i)); + return newdesc.toString(); + } + } + + /** + * Inserts a parameter type at the beginning of the parameter + * list represented + * by the given descriptor. + * + *

classname must not be an array type. + * + * @param classname parameter type (not primitive type) + * @param desc descriptor + */ + public static String insertParameter(String classname, String desc) { + if (desc.charAt(0) != '(') + return desc; + else + return "(L" + classname.replace('.', '/') + ';' + + desc.substring(1); + } + + /** + * Appends a parameter type to the parameter list represented + * by the given descriptor. The appended parameter becomes + * the last parameter. + * + * @param type the type of the appended parameter. + * @param descriptor the original descriptor. + */ + public static String appendParameter(CtClass type, String descriptor) { + int i = descriptor.indexOf(')'); + if (i < 0) + return descriptor; + else { + StringBuffer newdesc = new StringBuffer(); + newdesc.append(descriptor.substring(0, i)); + toDescriptor(newdesc, type); + newdesc.append(descriptor.substring(i)); + return newdesc.toString(); + } + } + + /** + * Inserts a parameter type at the beginning of the parameter + * list represented + * by the given descriptor. + * + * @param type the type of the inserted parameter. + * @param descriptor the descriptor of the method. + */ + public static String insertParameter(CtClass type, + String descriptor) { + if (descriptor.charAt(0) != '(') + return descriptor; + else + return "(" + of(type) + descriptor.substring(1); + } + + /** + * Changes the return type included in the given descriptor. + * + *

classname must not be an array type. + * + * @param classname return type + * @param desc descriptor + */ + public static String changeReturnType(String classname, String desc) { + int i = desc.indexOf(')'); + if (i < 0) + return desc; + else { + StringBuffer newdesc = new StringBuffer(); + newdesc.append(desc.substring(0, i + 1)); + newdesc.append('L'); + newdesc.append(classname.replace('.', '/')); + newdesc.append(';'); + return newdesc.toString(); + } + } + + /** + * Returns the CtClass objects representing the parameter + * types specified by the given descriptor. + * + * @param desc descriptor + * @param cp the class pool used for obtaining + * a CtClass object. + */ + public static CtClass[] getParameterTypes(String desc, ClassPool cp) + throws NotFoundException + { + if (desc.charAt(0) != '(') + return null; + else { + int num = numOfParameters(desc); + CtClass[] args = new CtClass[num]; + int n = 0; + int i = 1; + do { + i = toCtClass(cp, desc, i, args, n++); + } while (i > 0); + return args; + } + } + + /** + * Returns true if the list of the parameter types of desc1 is equal to + * that of desc2. + * For example, "(II)V" and "(II)I" are equal. + */ + public static boolean eqParamTypes(String desc1, String desc2) { + if (desc1.charAt(0) != '(') + return false; + + for (int i = 0; true; ++i) { + char c = desc1.charAt(i); + if (c != desc2.charAt(i)) + return false; + + if (c == ')') + return true; + } + } + + /** + * Returns the signature of the given descriptor. The signature does + * not include the return type. For example, the signature of "(I)V" + * is "(I)". + */ + public static String getParamDescriptor(String decl) { + return decl.substring(0, decl.indexOf(')') + 1); + } + + /** + * Returns the CtClass object representing the return + * type specified by the given descriptor. + * + * @param desc descriptor + * @param cp the class pool used for obtaining + * a CtClass object. + */ + public static CtClass getReturnType(String desc, ClassPool cp) + throws NotFoundException + { + int i = desc.indexOf(')'); + if (i < 0) + return null; + else { + CtClass[] type = new CtClass[1]; + toCtClass(cp, desc, i + 1, type, 0); + return type[0]; + } + } + + /** + * Returns the number of the prameters included in the given + * descriptor. + * + * @param desc descriptor + */ + public static int numOfParameters(String desc) { + int n = 0; + int i = 1; + for (;;) { + char c = desc.charAt(i); + if (c == ')') + break; + + while (c == '[') + c = desc.charAt(++i); + + if (c == 'L') { + i = desc.indexOf(';', i) + 1; + if (i <= 0) + throw new IndexOutOfBoundsException("bad descriptor"); + } + else + ++i; + + ++n; + } + + return n; + } + + /** + * Returns a CtClass object representing the type + * specified by the given descriptor. + * + *

This method works even if the package-class separator is + * not / but . (period). For example, + * it accepts Ljava.lang.Object; + * as well as Ljava/lang/Object;. + * + * @param desc descriptor. + * @param cp the class pool used for obtaining + * a CtClass object. + */ + public static CtClass toCtClass(String desc, ClassPool cp) + throws NotFoundException + { + CtClass[] clazz = new CtClass[1]; + int res = toCtClass(cp, desc, 0, clazz, 0); + if (res >= 0) + return clazz[0]; + else { + // maybe, you forgot to surround the class name with + // L and ;. It violates the protocol, but I'm tolerant... + return cp.get(desc.replace('/', '.')); + } + } + + private static int toCtClass(ClassPool cp, String desc, int i, + CtClass[] args, int n) + throws NotFoundException + { + int i2; + String name; + + int arrayDim = 0; + char c = desc.charAt(i); + while (c == '[') { + ++arrayDim; + c = desc.charAt(++i); + } + + if (c == 'L') { + i2 = desc.indexOf(';', ++i); + name = desc.substring(i, i2++).replace('/', '.'); + } + else { + CtClass type = toPrimitiveClass(c); + if (type == null) + return -1; // error + + i2 = i + 1; + if (arrayDim == 0) { + args[n] = type; + return i2; // neither an array type or a class type + } + else + name = type.getName(); + } + + if (arrayDim > 0) { + StringBuffer sbuf = new StringBuffer(name); + while (arrayDim-- > 0) + sbuf.append("[]"); + + name = sbuf.toString(); + } + + args[n] = cp.get(name); + return i2; + } + + static CtClass toPrimitiveClass(char c) { + CtClass type = null; + switch (c) { + case 'Z' : + type = CtClass.booleanType; + break; + case 'C' : + type = CtClass.charType; + break; + case 'B' : + type = CtClass.byteType; + break; + case 'S' : + type = CtClass.shortType; + break; + case 'I' : + type = CtClass.intType; + break; + case 'J' : + type = CtClass.longType; + break; + case 'F' : + type = CtClass.floatType; + break; + case 'D' : + type = CtClass.doubleType; + break; + case 'V' : + type = CtClass.voidType; + break; + } + + return type; + } + + /** + * Computes the dimension of the array represented by the given + * descriptor. For example, if the descriptor is "[[I", + * then this method returns 2. + * + * @param desc the descriptor. + * @return 0 if the descriptor does not represent an array type. + */ + public static int arrayDimension(String desc) { + int dim = 0; + while (desc.charAt(dim) == '[') + ++dim; + + return dim; + } + + /** + * Returns the descriptor of the type of the array component. + * For example, if the given descriptor is + * "[[Ljava/lang/String;" and the given dimension is 2, + * then this method returns "Ljava/lang/String;". + * + * @param desc the descriptor. + * @param dim the array dimension. + */ + public static String toArrayComponent(String desc, int dim) { + return desc.substring(dim); + } + + /** + * Computes the data size specified by the given descriptor. + * For example, if the descriptor is "D", this method returns 2. + * + *

If the descriptor represents a method type, this method returns + * (the size of the returned value) - (the sum of the data sizes + * of all the parameters). For example, if the descriptor is + * "(I)D", then this method returns 1 (= 2 - 1). + * + * @param desc descriptor + */ + public static int dataSize(String desc) { + return dataSize(desc, true); + } + + /** + * Computes the data size of parameters. + * If one of the parameters is double type, the size of that parameter + * is 2 words. For example, if the given descriptor is + * "(IJ)D", then this method returns 3. The size of the + * return type is not computed. + * + * @param desc a method descriptor. + */ + public static int paramSize(String desc) { + return -dataSize(desc, false); + } + + private static int dataSize(String desc, boolean withRet) { + int n = 0; + char c = desc.charAt(0); + if (c == '(') { + int i = 1; + for (;;) { + c = desc.charAt(i); + if (c == ')') { + c = desc.charAt(i + 1); + break; + } + + boolean array = false; + while (c == '[') { + array = true; + c = desc.charAt(++i); + } + + if (c == 'L') { + i = desc.indexOf(';', i) + 1; + if (i <= 0) + throw new IndexOutOfBoundsException("bad descriptor"); + } + else + ++i; + + if (!array && (c == 'J' || c == 'D')) + n -= 2; + else + --n; + } + } + + if (withRet) + if (c == 'J' || c == 'D') + n += 2; + else if (c != 'V') + ++n; + + return n; + } + + /** + * Returns a human-readable representation of the + * given descriptor. For example, Ljava/lang/Object; + * is converted into java.lang.Object. + * (I[I)V is converted into (int, int[]) + * (the return type is ignored). + */ + public static String toString(String desc) { + return PrettyPrinter.toString(desc); + } + + static class PrettyPrinter { + static String toString(String desc) { + StringBuffer sbuf = new StringBuffer(); + if (desc.charAt(0) == '(') { + int pos = 1; + sbuf.append('('); + while (desc.charAt(pos) != ')') { + if (pos > 1) + sbuf.append(','); + + pos = readType(sbuf, pos, desc); + } + + sbuf.append(')'); + } + else + readType(sbuf, 0, desc); + + return sbuf.toString(); + } + + static int readType(StringBuffer sbuf, int pos, String desc) { + char c = desc.charAt(pos); + int arrayDim = 0; + while (c == '[') { + arrayDim++; + c = desc.charAt(++pos); + } + + if (c == 'L') + while (true) { + c = desc.charAt(++pos); + if (c == ';') + break; + + if (c == '/') + c = '.'; + + sbuf.append(c); + } + else { + CtClass t = toPrimitiveClass(c); + sbuf.append(t.getName()); + } + + while (arrayDim-- > 0) + sbuf.append("[]"); + + return pos + 1; + } + } + + /** + * An Iterator over a descriptor. + */ + public static class Iterator { + private String desc; + private int index, curPos; + private boolean param; + + /** + * Constructs an iterator. + * + * @param s descriptor. + */ + public Iterator(String s) { + desc = s; + index = curPos = 0; + param = false; + } + + /** + * Returns true if the iteration has more elements. + */ + public boolean hasNext() { + return index < desc.length(); + } + + /** + * Returns true if the current element is a parameter type. + */ + public boolean isParameter() { return param; } + + /** + * Returns the first character of the current element. + */ + public char currentChar() { return desc.charAt(curPos); } + + /** + * Returns true if the current element is double or long type. + */ + public boolean is2byte() { + char c = currentChar(); + return c == 'D' || c == 'J'; + } + + /** + * Returns the position of the next type character. + * That type character becomes a new current element. + */ + public int next() { + int nextPos = index; + char c = desc.charAt(nextPos); + if (c == '(') { + ++index; + c = desc.charAt(++nextPos); + param = true; + } + + if (c == ')') { + ++index; + c = desc.charAt(++nextPos); + param = false; + } + + while (c == '[') + c = desc.charAt(++nextPos); + + if (c == 'L') { + nextPos = desc.indexOf(';', nextPos) + 1; + if (nextPos <= 0) + throw new IndexOutOfBoundsException("bad descriptor"); + } + else + ++nextPos; + + curPos = index; + index = nextPos; + return curPos; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java new file mode 100644 index 0000000..1035450 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java @@ -0,0 +1,31 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import com.wenshuo.agent.javassist.CannotCompileException; + +/** + * An exception thrown when adding a duplicate member is requested. + * + * @see ClassFile#addMethod(MethodInfo) + * @see ClassFile#addField(FieldInfo) + */ +public class DuplicateMemberException extends CannotCompileException { + public DuplicateMemberException(String msg) { + super(msg); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java new file mode 100644 index 0000000..05a0f4a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java @@ -0,0 +1,142 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +import com.wenshuo.agent.javassist.CtConstructor; + +/** + * EnclosingMethod_attribute. + */ +public class EnclosingMethodAttribute extends AttributeInfo { + /** + * The name of this attribute "EnclosingMethod". + */ + public static final String tag = "EnclosingMethod"; + + EnclosingMethodAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs an EnclosingMethod attribute. + * + * @param cp a constant pool table. + * @param className the name of the innermost enclosing class. + * @param methodName the name of the enclosing method. + * @param methodDesc the descriptor of the enclosing method. + */ + public EnclosingMethodAttribute(ConstPool cp, String className, + String methodName, String methodDesc) { + super(cp, tag); + int ci = cp.addClassInfo(className); + int ni = cp.addNameAndTypeInfo(methodName, methodDesc); + byte[] bvalue = new byte[4]; + bvalue[0] = (byte)(ci >>> 8); + bvalue[1] = (byte)ci; + bvalue[2] = (byte)(ni >>> 8); + bvalue[3] = (byte)ni; + set(bvalue); + } + + /** + * Constructs an EnclosingMethod attribute. + * The value of method_index is set to 0. + * + * @param cp a constant pool table. + * @param className the name of the innermost enclosing class. + */ + public EnclosingMethodAttribute(ConstPool cp, String className) { + super(cp, tag); + int ci = cp.addClassInfo(className); + int ni = 0; + byte[] bvalue = new byte[4]; + bvalue[0] = (byte)(ci >>> 8); + bvalue[1] = (byte)ci; + bvalue[2] = (byte)(ni >>> 8); + bvalue[3] = (byte)ni; + set(bvalue); + } + + /** + * Returns the value of class_index. + */ + public int classIndex() { + return ByteArray.readU16bit(get(), 0); + } + + /** + * Returns the value of method_index. + */ + public int methodIndex() { + return ByteArray.readU16bit(get(), 2); + } + + /** + * Returns the name of the class specified by class_index. + */ + public String className() { + return getConstPool().getClassInfo(classIndex()); + } + + /** + * Returns the method name specified by method_index. + * If the method is a class initializer (static constructor), + * {@link MethodInfo#nameClinit} is returned. + */ + public String methodName() { + ConstPool cp = getConstPool(); + int mi = methodIndex(); + if (mi == 0) + return MethodInfo.nameClinit; + else { + int ni = cp.getNameAndTypeName(mi); + return cp.getUtf8Info(ni); + } + } + + /** + * Returns the method descriptor specified by method_index. + */ + public String methodDescriptor() { + ConstPool cp = getConstPool(); + int mi = methodIndex(); + int ti = cp.getNameAndTypeDescriptor(mi); + return cp.getUtf8Info(ti); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + if (methodIndex() == 0) + return new EnclosingMethodAttribute(newCp, className()); + else + return new EnclosingMethodAttribute(newCp, className(), + methodName(), methodDescriptor()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java new file mode 100644 index 0000000..9ff2fa5 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java @@ -0,0 +1,281 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Map; + +class ExceptionTableEntry { + int startPc; + int endPc; + int handlerPc; + int catchType; + + ExceptionTableEntry(int start, int end, int handle, int type) { + startPc = start; + endPc = end; + handlerPc = handle; + catchType = type; + } +} + +/** + * exception_table[] of Code_attribute. + */ +public class ExceptionTable implements Cloneable { + private ConstPool constPool; + private ArrayList entries; + + /** + * Constructs an exception_table[]. + * + * @param cp constant pool table. + */ + public ExceptionTable(ConstPool cp) { + constPool = cp; + entries = new ArrayList(); + } + + ExceptionTable(ConstPool cp, DataInputStream in) throws IOException { + constPool = cp; + int length = in.readUnsignedShort(); + ArrayList list = new ArrayList(length); + for (int i = 0; i < length; ++i) { + int start = in.readUnsignedShort(); + int end = in.readUnsignedShort(); + int handle = in.readUnsignedShort(); + int type = in.readUnsignedShort(); + list.add(new ExceptionTableEntry(start, end, handle, type)); + } + + entries = list; + } + + /** + * Creates and returns a copy of this object. + * The constant pool object is shared between this object + * and the cloned object. + */ + public Object clone() throws CloneNotSupportedException { + ExceptionTable r = (ExceptionTable)super.clone(); + r.entries = new ArrayList(entries); + return r; + } + + /** + * Returns exception_table_length, which is the number + * of entries in the exception_table[]. + */ + public int size() { + return entries.size(); + } + + /** + * Returns startPc of the n-th entry. + * + * @param nth the n-th (>= 0). + */ + public int startPc(int nth) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + return e.startPc; + } + + /** + * Sets startPc of the n-th entry. + * + * @param nth the n-th (>= 0). + * @param value new value. + */ + public void setStartPc(int nth, int value) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + e.startPc = value; + } + + /** + * Returns endPc of the n-th entry. + * + * @param nth the n-th (>= 0). + */ + public int endPc(int nth) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + return e.endPc; + } + + /** + * Sets endPc of the n-th entry. + * + * @param nth the n-th (>= 0). + * @param value new value. + */ + public void setEndPc(int nth, int value) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + e.endPc = value; + } + + /** + * Returns handlerPc of the n-th entry. + * + * @param nth the n-th (>= 0). + */ + public int handlerPc(int nth) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + return e.handlerPc; + } + + /** + * Sets handlerPc of the n-th entry. + * + * @param nth the n-th (>= 0). + * @param value new value. + */ + public void setHandlerPc(int nth, int value) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + e.handlerPc = value; + } + + /** + * Returns catchType of the n-th entry. + * + * @param nth the n-th (>= 0). + * @return an index into the constant_pool table, + * or zero if this exception handler is for all exceptions. + */ + public int catchType(int nth) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + return e.catchType; + } + + /** + * Sets catchType of the n-th entry. + * + * @param nth the n-th (>= 0). + * @param value new value. + */ + public void setCatchType(int nth, int value) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(nth); + e.catchType = value; + } + + /** + * Copies the given exception table at the specified position + * in the table. + * + * @param index index (>= 0) at which the entry is to be inserted. + * @param offset the offset added to the code position. + */ + public void add(int index, ExceptionTable table, int offset) { + int len = table.size(); + while (--len >= 0) { + ExceptionTableEntry e + = (ExceptionTableEntry)table.entries.get(len); + add(index, e.startPc + offset, e.endPc + offset, + e.handlerPc + offset, e.catchType); + } + } + + /** + * Adds a new entry at the specified position in the table. + * + * @param index index (>= 0) at which the entry is to be inserted. + * @param start startPc + * @param end endPc + * @param handler handlerPc + * @param type catchType + */ + public void add(int index, int start, int end, int handler, int type) { + if (start < end) + entries.add(index, + new ExceptionTableEntry(start, end, handler, type)); + } + + /** + * Appends a new entry at the end of the table. + * + * @param start startPc + * @param end endPc + * @param handler handlerPc + * @param type catchType + */ + public void add(int start, int end, int handler, int type) { + if (start < end) + entries.add(new ExceptionTableEntry(start, end, handler, type)); + } + + /** + * Removes the entry at the specified position in the table. + * + * @param index the index of the removed entry. + */ + public void remove(int index) { + entries.remove(index); + } + + /** + * Makes a copy of this exception_table[]. + * Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public ExceptionTable copy(ConstPool newCp, Map classnames) { + ExceptionTable et = new ExceptionTable(newCp); + ConstPool srcCp = constPool; + int len = size(); + for (int i = 0; i < len; ++i) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); + int type = srcCp.copy(e.catchType, newCp, classnames); + et.add(e.startPc, e.endPc, e.handlerPc, type); + } + + return et; + } + + void shiftPc(int where, int gapLength, boolean exclusive) { + int len = size(); + for (int i = 0; i < len; ++i) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); + e.startPc = shiftPc(e.startPc, where, gapLength, exclusive); + e.endPc = shiftPc(e.endPc, where, gapLength, exclusive); + e.handlerPc = shiftPc(e.handlerPc, where, gapLength, exclusive); + } + } + + private static int shiftPc(int pc, int where, int gapLength, + boolean exclusive) { + if (pc > where || (exclusive && pc == where)) + pc += gapLength; + + return pc; + } + + void write(DataOutputStream out) throws IOException { + int len = size(); + out.writeShort(len); // exception_table_length + for (int i = 0; i < len; ++i) { + ExceptionTableEntry e = (ExceptionTableEntry)entries.get(i); + out.writeShort(e.startPc); + out.writeShort(e.endPc); + out.writeShort(e.handlerPc); + out.writeShort(e.catchType); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java new file mode 100644 index 0000000..e20a621 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java @@ -0,0 +1,174 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * Exceptions_attribute. + */ +public class ExceptionsAttribute extends AttributeInfo { + /** + * The name of this attribute "Exceptions". + */ + public static final String tag = "Exceptions"; + + ExceptionsAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a copy of an exceptions attribute. + * + * @param cp constant pool table. + * @param src source attribute. + */ + private ExceptionsAttribute(ConstPool cp, ExceptionsAttribute src, + Map classnames) { + super(cp, tag); + copyFrom(src, classnames); + } + + /** + * Constructs a new exceptions attribute. + * + * @param cp constant pool table. + */ + public ExceptionsAttribute(ConstPool cp) { + super(cp, tag); + byte[] data = new byte[2]; + data[0] = data[1] = 0; // empty + this.info = data; + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. It can be null. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + return new ExceptionsAttribute(newCp, this, classnames); + } + + /** + * Copies the contents from a source attribute. + * Specified class names are replaced during the copy. + * + * @param srcAttr source Exceptions attribute + * @param classnames pairs of replaced and substituted + * class names. + */ + private void copyFrom(ExceptionsAttribute srcAttr, Map classnames) { + ConstPool srcCp = srcAttr.constPool; + ConstPool destCp = this.constPool; + byte[] src = srcAttr.info; + int num = src.length; + byte[] dest = new byte[num]; + dest[0] = src[0]; + dest[1] = src[1]; // the number of elements. + for (int i = 2; i < num; i += 2) { + int index = ByteArray.readU16bit(src, i); + ByteArray.write16bit(srcCp.copy(index, destCp, classnames), + dest, i); + } + + this.info = dest; + } + + /** + * Returns exception_index_table[]. + */ + public int[] getExceptionIndexes() { + byte[] blist = info; + int n = blist.length; + if (n <= 2) + return null; + + int[] elist = new int[n / 2 - 1]; + int k = 0; + for (int j = 2; j < n; j += 2) + elist[k++] = ((blist[j] & 0xff) << 8) | (blist[j + 1] & 0xff); + + return elist; + } + + /** + * Returns the names of exceptions that the method may throw. + */ + public String[] getExceptions() { + byte[] blist = info; + int n = blist.length; + if (n <= 2) + return null; + + String[] elist = new String[n / 2 - 1]; + int k = 0; + for (int j = 2; j < n; j += 2) { + int index = ((blist[j] & 0xff) << 8) | (blist[j + 1] & 0xff); + elist[k++] = constPool.getClassInfo(index); + } + + return elist; + } + + /** + * Sets exception_index_table[]. + */ + public void setExceptionIndexes(int[] elist) { + int n = elist.length; + byte[] blist = new byte[n * 2 + 2]; + ByteArray.write16bit(n, blist, 0); + for (int i = 0; i < n; ++i) + ByteArray.write16bit(elist[i], blist, i * 2 + 2); + + info = blist; + } + + /** + * Sets the names of exceptions that the method may throw. + */ + public void setExceptions(String[] elist) { + int n = elist.length; + byte[] blist = new byte[n * 2 + 2]; + ByteArray.write16bit(n, blist, 0); + for (int i = 0; i < n; ++i) + ByteArray.write16bit(constPool.addClassInfo(elist[i]), + blist, i * 2 + 2); + + info = blist; + } + + /** + * Returns number_of_exceptions. + */ + public int tableLength() { return info.length / 2 - 1; } + + /** + * Returns the value of exception_index_table[nth]. + */ + public int getException(int nth) { + int index = nth * 2 + 2; // nth >= 0 + return ((info[index] & 0xff) << 8) | (info[index + 1] & 0xff); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java new file mode 100644 index 0000000..62dd9fa --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java @@ -0,0 +1,276 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.List; +import java.util.ArrayList; + +/** + * field_info structure. + * + *

The following code adds a public field width + * of int type: + * 

+ * ClassFile cf = ...
+ * FieldInfo f = new FieldInfo(cf.getConstPool(), "width", "I");
+ * f.setAccessFlags(AccessFlag.PUBLIC);
+ * cf.addField(f);
+ *
+ * + * @see javassist.CtField#getFieldInfo() + */ +public final class FieldInfo { + ConstPool constPool; + int accessFlags; + int name; + String cachedName; + String cachedType; + int descriptor; + ArrayList attribute; // may be null. + + private FieldInfo(ConstPool cp) { + constPool = cp; + accessFlags = 0; + attribute = null; + } + + /** + * Constructs a field_info structure. + * + * @param cp a constant pool table + * @param fieldName field name + * @param desc field descriptor + * + * @see Descriptor + */ + public FieldInfo(ConstPool cp, String fieldName, String desc) { + this(cp); + name = cp.addUtf8Info(fieldName); + cachedName = fieldName; + descriptor = cp.addUtf8Info(desc); + } + + FieldInfo(ConstPool cp, DataInputStream in) throws IOException { + this(cp); + read(in); + } + + /** + * Returns a string representation of the object. + */ + public String toString() { + return getName() + " " + getDescriptor(); + } + + /** + * Copies all constant pool items to a given new constant pool + * and replaces the original items with the new ones. + * This is used for garbage collecting the items of removed fields + * and methods. + * + * @param cp the destination + */ + void compact(ConstPool cp) { + name = cp.addUtf8Info(getName()); + descriptor = cp.addUtf8Info(getDescriptor()); + attribute = AttributeInfo.copyAll(attribute, cp); + constPool = cp; + } + + void prune(ConstPool cp) { + ArrayList newAttributes = new ArrayList(); + AttributeInfo invisibleAnnotations + = getAttribute(AnnotationsAttribute.invisibleTag); + if (invisibleAnnotations != null) { + invisibleAnnotations = invisibleAnnotations.copy(cp, null); + newAttributes.add(invisibleAnnotations); + } + + AttributeInfo visibleAnnotations + = getAttribute(AnnotationsAttribute.visibleTag); + if (visibleAnnotations != null) { + visibleAnnotations = visibleAnnotations.copy(cp, null); + newAttributes.add(visibleAnnotations); + } + + AttributeInfo signature + = getAttribute(SignatureAttribute.tag); + if (signature != null) { + signature = signature.copy(cp, null); + newAttributes.add(signature); + } + + int index = getConstantValue(); + if (index != 0) { + index = constPool.copy(index, cp, null); + newAttributes.add(new ConstantAttribute(cp, index)); + } + + attribute = newAttributes; + name = cp.addUtf8Info(getName()); + descriptor = cp.addUtf8Info(getDescriptor()); + constPool = cp; + } + + /** + * Returns the constant pool table used + * by this field_info. + */ + public ConstPool getConstPool() { + return constPool; + } + + /** + * Returns the field name. + */ + public String getName() { + if (cachedName == null) + cachedName = constPool.getUtf8Info(name); + + return cachedName; + } + + /** + * Sets the field name. + */ + public void setName(String newName) { + name = constPool.addUtf8Info(newName); + cachedName = newName; + } + + /** + * Returns the access flags. + * + * @see AccessFlag + */ + public int getAccessFlags() { + return accessFlags; + } + + /** + * Sets the access flags. + * + * @see AccessFlag + */ + public void setAccessFlags(int acc) { + accessFlags = acc; + } + + /** + * Returns the field descriptor. + * + * @see Descriptor + */ + public String getDescriptor() { + return constPool.getUtf8Info(descriptor); + } + + /** + * Sets the field descriptor. + * + * @see Descriptor + */ + public void setDescriptor(String desc) { + if (!desc.equals(getDescriptor())) + descriptor = constPool.addUtf8Info(desc); + } + + /** + * Finds a ConstantValue attribute and returns the index into + * the constant_pool table. + * + * @return 0 if a ConstantValue attribute is not found. + */ + public int getConstantValue() { + if ((accessFlags & AccessFlag.STATIC) == 0) + return 0; + + ConstantAttribute attr + = (ConstantAttribute)getAttribute(ConstantAttribute.tag); + if (attr == null) + return 0; + else + return attr.getConstantValue(); + } + + /** + * Returns all the attributes. The returned List object + * is shared with this object. If you add a new attribute to the list, + * the attribute is also added to the field represented by this + * object. If you remove an attribute from the list, it is also removed + * from the field. + * + * @return a list of AttributeInfo objects. + * @see AttributeInfo + */ + public List getAttributes() { + if (attribute == null) + attribute = new ArrayList(); + + return attribute; + } + + /** + * Returns the attribute with the specified name. + * It returns null if the specified attribute is not found. + * + * @param name attribute name + * @see #getAttributes() + */ + public AttributeInfo getAttribute(String name) { + return AttributeInfo.lookup(attribute, name); + } + + /** + * Appends an attribute. If there is already an attribute with + * the same name, the new one substitutes for it. + * + * @see #getAttributes() + */ + public void addAttribute(AttributeInfo info) { + if (attribute == null) + attribute = new ArrayList(); + + AttributeInfo.remove(attribute, info.getName()); + attribute.add(info); + } + + private void read(DataInputStream in) throws IOException { + accessFlags = in.readUnsignedShort(); + name = in.readUnsignedShort(); + descriptor = in.readUnsignedShort(); + int n = in.readUnsignedShort(); + attribute = new ArrayList(); + for (int i = 0; i < n; ++i) + attribute.add(AttributeInfo.read(constPool, in)); + } + + void write(DataOutputStream out) throws IOException { + out.writeShort(accessFlags); + out.writeShort(name); + out.writeShort(descriptor); + if (attribute == null) + out.writeShort(0); + else { + out.writeShort(attribute.size()); + AttributeInfo.writeAll(attribute, out); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java new file mode 100644 index 0000000..895c320 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java @@ -0,0 +1,242 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.util.Map; +import java.io.IOException; + +/** + * InnerClasses_attribute. + */ +public class InnerClassesAttribute extends AttributeInfo { + /** + * The name of this attribute "InnerClasses". + */ + public static final String tag = "InnerClasses"; + + InnerClassesAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + private InnerClassesAttribute(ConstPool cp, byte[] info) { + super(cp, tag, info); + } + + /** + * Constructs an empty InnerClasses attribute. + * + * @see #append(String, String, String, int) + */ + public InnerClassesAttribute(ConstPool cp) { + super(cp, tag, new byte[2]); + ByteArray.write16bit(0, get(), 0); + } + + /** + * Returns number_of_classes. + */ + public int tableLength() { return ByteArray.readU16bit(get(), 0); } + + /** + * Returns classes[nth].inner_class_info_index. + */ + public int innerClassIndex(int nth) { + return ByteArray.readU16bit(get(), nth * 8 + 2); + } + + /** + * Returns the class name indicated + * by classes[nth].inner_class_info_index. + * + * @return null or the class name. + */ + public String innerClass(int nth) { + int i = innerClassIndex(nth); + if (i == 0) + return null; + else + return constPool.getClassInfo(i); + } + + /** + * Sets classes[nth].inner_class_info_index to + * the given index. + */ + public void setInnerClassIndex(int nth, int index) { + ByteArray.write16bit(index, get(), nth * 8 + 2); + } + + /** + * Returns classes[nth].outer_class_info_index. + */ + public int outerClassIndex(int nth) { + return ByteArray.readU16bit(get(), nth * 8 + 4); + } + + /** + * Returns the class name indicated + * by classes[nth].outer_class_info_index. + * + * @return null or the class name. + */ + public String outerClass(int nth) { + int i = outerClassIndex(nth); + if (i == 0) + return null; + else + return constPool.getClassInfo(i); + } + + /** + * Sets classes[nth].outer_class_info_index to + * the given index. + */ + public void setOuterClassIndex(int nth, int index) { + ByteArray.write16bit(index, get(), nth * 8 + 4); + } + + /** + * Returns classes[nth].inner_name_index. + */ + public int innerNameIndex(int nth) { + return ByteArray.readU16bit(get(), nth * 8 + 6); + } + + /** + * Returns the simple class name indicated + * by classes[nth].inner_name_index. + * + * @return null or the class name. + */ + public String innerName(int nth) { + int i = innerNameIndex(nth); + if (i == 0) + return null; + else + return constPool.getUtf8Info(i); + } + + /** + * Sets classes[nth].inner_name_index to + * the given index. + */ + public void setInnerNameIndex(int nth, int index) { + ByteArray.write16bit(index, get(), nth * 8 + 6); + } + + /** + * Returns classes[nth].inner_class_access_flags. + */ + public int accessFlags(int nth) { + return ByteArray.readU16bit(get(), nth * 8 + 8); + } + + /** + * Sets classes[nth].inner_class_access_flags to + * the given index. + */ + public void setAccessFlags(int nth, int flags) { + ByteArray.write16bit(flags, get(), nth * 8 + 8); + } + + /** + * Appends a new entry. + * + * @param inner inner_class_info_index + * @param outer outer_class_info_index + * @param name inner_name_index + * @param flags inner_class_access_flags + */ + public void append(String inner, String outer, String name, int flags) { + int i = constPool.addClassInfo(inner); + int o = constPool.addClassInfo(outer); + int n = constPool.addUtf8Info(name); + append(i, o, n, flags); + } + + /** + * Appends a new entry. + * + * @param inner inner_class_info_index + * @param outer outer_class_info_index + * @param name inner_name_index + * @param flags inner_class_access_flags + */ + public void append(int inner, int outer, int name, int flags) { + byte[] data = get(); + int len = data.length; + byte[] newData = new byte[len + 8]; + for (int i = 2; i < len; ++i) + newData[i] = data[i]; + + int n = ByteArray.readU16bit(data, 0); + ByteArray.write16bit(n + 1, newData, 0); + + ByteArray.write16bit(inner, newData, len); + ByteArray.write16bit(outer, newData, len + 2); + ByteArray.write16bit(name, newData, len + 4); + ByteArray.write16bit(flags, newData, len + 6); + + set(newData); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + byte[] src = get(); + byte[] dest = new byte[src.length]; + ConstPool cp = getConstPool(); + InnerClassesAttribute attr = new InnerClassesAttribute(newCp, dest); + int n = ByteArray.readU16bit(src, 0); + ByteArray.write16bit(n, dest, 0); + int j = 2; + for (int i = 0; i < n; ++i) { + int innerClass = ByteArray.readU16bit(src, j); + int outerClass = ByteArray.readU16bit(src, j + 2); + int innerName = ByteArray.readU16bit(src, j + 4); + int innerAccess = ByteArray.readU16bit(src, j + 6); + + if (innerClass != 0) + innerClass = cp.copy(innerClass, newCp, classnames); + + ByteArray.write16bit(innerClass, dest, j); + + if (outerClass != 0) + outerClass = cp.copy(outerClass, newCp, classnames); + + ByteArray.write16bit(outerClass, dest, j + 2); + + if (innerName != 0) + innerName = cp.copy(innerName, newCp, classnames); + + ByteArray.write16bit(innerName, dest, j + 4); + ByteArray.write16bit(innerAccess, dest, j + 6); + j += 8; + } + + return attr; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java new file mode 100644 index 0000000..c9cc815 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java @@ -0,0 +1,295 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode; + +import java.io.PrintStream; + +import com.wenshuo.agent.javassist.CtMethod; + +/** + * Simple utility class for printing the bytecode instructions of a method. + * + * @author Jason T. Greene + */ +public class InstructionPrinter implements Opcode { + + private final static String opcodes[] = Mnemonic.OPCODE; + private final PrintStream stream; + + /** + * Constructs a InstructionPrinter object. + */ + public InstructionPrinter(PrintStream stream) { + this.stream = stream; + } + + /** + * Prints the bytecode instructions of a given method. + */ + public static void print(CtMethod method, PrintStream stream) { + (new InstructionPrinter(stream)).print(method); + } + + /** + * Prints the bytecode instructions of a given method. + */ + public void print(CtMethod method) { + MethodInfo info = method.getMethodInfo2(); + ConstPool pool = info.getConstPool(); + CodeAttribute code = info.getCodeAttribute(); + if (code == null) + return; + + CodeIterator iterator = code.iterator(); + while (iterator.hasNext()) { + int pos; + try { + pos = iterator.next(); + } catch (BadBytecode e) { + throw new RuntimeException(e); + } + + stream.println(pos + ": " + instructionString(iterator, pos, pool)); + } + } + + /** + * Gets a string representation of the bytecode instruction at the specified + * position. + */ + public static String instructionString(CodeIterator iter, int pos, ConstPool pool) { + int opcode = iter.byteAt(pos); + + if (opcode > opcodes.length || opcode < 0) + throw new IllegalArgumentException("Invalid opcode, opcode: " + opcode + " pos: "+ pos); + + String opstring = opcodes[opcode]; + switch (opcode) { + case BIPUSH: + return opstring + " " + iter.byteAt(pos + 1); + case SIPUSH: + return opstring + " " + iter.s16bitAt(pos + 1); + case LDC: + return opstring + " " + ldc(pool, iter.byteAt(pos + 1)); + case LDC_W : + case LDC2_W : + return opstring + " " + ldc(pool, iter.u16bitAt(pos + 1)); + case ILOAD: + case LLOAD: + case FLOAD: + case DLOAD: + case ALOAD: + case ISTORE: + case LSTORE: + case FSTORE: + case DSTORE: + case ASTORE: + return opstring + " " + iter.byteAt(pos + 1); + case IFEQ: + case IFGE: + case IFGT: + case IFLE: + case IFLT: + case IFNE: + case IFNONNULL: + case IFNULL: + case IF_ACMPEQ: + case IF_ACMPNE: + case IF_ICMPEQ: + case IF_ICMPGE: + case IF_ICMPGT: + case IF_ICMPLE: + case IF_ICMPLT: + case IF_ICMPNE: + return opstring + " " + (iter.s16bitAt(pos + 1) + pos); + case IINC: + return opstring + " " + iter.byteAt(pos + 1) + ", " + iter.signedByteAt(pos + 2); + case GOTO: + case JSR: + return opstring + " " + (iter.s16bitAt(pos + 1) + pos); + case RET: + return opstring + " " + iter.byteAt(pos + 1); + case TABLESWITCH: + return tableSwitch(iter, pos); + case LOOKUPSWITCH: + return lookupSwitch(iter, pos); + case GETSTATIC: + case PUTSTATIC: + case GETFIELD: + case PUTFIELD: + return opstring + " " + fieldInfo(pool, iter.u16bitAt(pos + 1)); + case INVOKEVIRTUAL: + case INVOKESPECIAL: + case INVOKESTATIC: + return opstring + " " + methodInfo(pool, iter.u16bitAt(pos + 1)); + case INVOKEINTERFACE: + return opstring + " " + interfaceMethodInfo(pool, iter.u16bitAt(pos + 1)); + case INVOKEDYNAMIC: + return opstring + " " + iter.u16bitAt(pos + 1); + case NEW: + return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); + case NEWARRAY: + return opstring + " " + arrayInfo(iter.byteAt(pos + 1)); + case ANEWARRAY: + case CHECKCAST: + return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); + case WIDE: + return wide(iter, pos); + case MULTIANEWARRAY: + return opstring + " " + classInfo(pool, iter.u16bitAt(pos + 1)); + case GOTO_W: + case JSR_W: + return opstring + " " + (iter.s32bitAt(pos + 1)+ pos); + default: + return opstring; + } + } + + + private static String wide(CodeIterator iter, int pos) { + int opcode = iter.byteAt(pos + 1); + int index = iter.u16bitAt(pos + 2); + switch (opcode) { + case ILOAD: + case LLOAD: + case FLOAD: + case DLOAD: + case ALOAD: + case ISTORE: + case LSTORE: + case FSTORE: + case DSTORE: + case ASTORE: + case IINC: + case RET: + return opcodes[opcode] + " " + index; + default: + throw new RuntimeException("Invalid WIDE operand"); + } + } + + + private static String arrayInfo(int type) { + switch (type) { + case T_BOOLEAN: + return "boolean"; + case T_CHAR: + return "char"; + case T_BYTE: + return "byte"; + case T_SHORT: + return "short"; + case T_INT: + return "int"; + case T_LONG: + return "long"; + case T_FLOAT: + return "float"; + case T_DOUBLE: + return "double"; + default: + throw new RuntimeException("Invalid array type"); + } + } + + + private static String classInfo(ConstPool pool, int index) { + return "#" + index + " = Class " + pool.getClassInfo(index); + } + + + private static String interfaceMethodInfo(ConstPool pool, int index) { + return "#" + index + " = Method " + + pool.getInterfaceMethodrefClassName(index) + "." + + pool.getInterfaceMethodrefName(index) + "(" + + pool.getInterfaceMethodrefType(index) + ")"; + } + + private static String methodInfo(ConstPool pool, int index) { + return "#" + index + " = Method " + + pool.getMethodrefClassName(index) + "." + + pool.getMethodrefName(index) + "(" + + pool.getMethodrefType(index) + ")"; + } + + + private static String fieldInfo(ConstPool pool, int index) { + return "#" + index + " = Field " + + pool.getFieldrefClassName(index) + "." + + pool.getFieldrefName(index) + "(" + + pool.getFieldrefType(index) + ")"; + } + + + private static String lookupSwitch(CodeIterator iter, int pos) { + StringBuffer buffer = new StringBuffer("lookupswitch {\n"); + int index = (pos & ~3) + 4; + // default + buffer.append("\t\tdefault: ").append(pos + iter.s32bitAt(index)).append("\n"); + int npairs = iter.s32bitAt(index += 4); + int end = npairs * 8 + (index += 4); + + for (; index < end; index += 8) { + int match = iter.s32bitAt(index); + int target = iter.s32bitAt(index + 4) + pos; + buffer.append("\t\t").append(match).append(": ").append(target).append("\n"); + } + + buffer.setCharAt(buffer.length() - 1, '}'); + return buffer.toString(); + } + + + private static String tableSwitch(CodeIterator iter, int pos) { + StringBuffer buffer = new StringBuffer("tableswitch {\n"); + int index = (pos & ~3) + 4; + // default + buffer.append("\t\tdefault: ").append(pos + iter.s32bitAt(index)).append("\n"); + int low = iter.s32bitAt(index += 4); + int high = iter.s32bitAt(index += 4); + int end = (high - low + 1) * 4 + (index += 4); + + // Offset table + for (int key = low; index < end; index += 4, key++) { + int target = iter.s32bitAt(index) + pos; + buffer.append("\t\t").append(key).append(": ").append(target).append("\n"); + } + + buffer.setCharAt(buffer.length() - 1, '}'); + return buffer.toString(); + } + + + private static String ldc(ConstPool pool, int index) { + int tag = pool.getTag(index); + switch (tag) { + case ConstPool.CONST_String: + return "#" + index + " = \"" + pool.getStringInfo(index) + "\""; + case ConstPool.CONST_Integer: + return "#" + index + " = int " + pool.getIntegerInfo(index); + case ConstPool.CONST_Float: + return "#" + index + " = float " + pool.getFloatInfo(index); + case ConstPool.CONST_Long: + return "#" + index + " = long " + pool.getLongInfo(index); + case ConstPool.CONST_Double: + return "#" + index + " = int " + pool.getDoubleInfo(index); + case ConstPool.CONST_Class: + return classInfo(pool, index); + default: + throw new RuntimeException("bad LDC: " + tag); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java new file mode 100644 index 0000000..c8a9dcc --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java @@ -0,0 +1,182 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * LineNumberTable_attribute. + */ +public class LineNumberAttribute extends AttributeInfo { + /** + * The name of this attribute "LineNumberTable". + */ + public static final String tag = "LineNumberTable"; + + LineNumberAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + private LineNumberAttribute(ConstPool cp, byte[] i) { + super(cp, tag, i); + } + + /** + * Returns line_number_table_length. + * This represents the number of entries in the table. + */ + public int tableLength() { + return ByteArray.readU16bit(info, 0); + } + + /** + * Returns line_number_table[i].start_pc. + * This represents the index into the code array at which the code + * for a new line in the original source file begins. + * + * @param i the i-th entry. + */ + public int startPc(int i) { + return ByteArray.readU16bit(info, i * 4 + 2); + } + + /** + * Returns line_number_table[i].line_number. + * This represents the corresponding line number in the original + * source file. + * + * @param i the i-th entry. + */ + public int lineNumber(int i) { + return ByteArray.readU16bit(info, i * 4 + 4); + } + + /** + * Returns the line number corresponding to the specified bytecode. + * + * @param pc the index into the code array. + */ + public int toLineNumber(int pc) { + int n = tableLength(); + int i = 0; + for (; i < n; ++i) + if (pc < startPc(i)) + if (i == 0) + return lineNumber(0); + else + break; + + return lineNumber(i - 1); + } + + /** + * Returns the index into the code array at which the code for + * the specified line begins. + * + * @param line the line number. + * @return -1 if the specified line is not found. + */ + public int toStartPc(int line) { + int n = tableLength(); + for (int i = 0; i < n; ++i) + if (line == lineNumber(i)) + return startPc(i); + + return -1; + } + + /** + * Used as a return type of toNearPc(). + */ + static public class Pc { + /** + * The index into the code array. + */ + public int index; + /** + * The line number. + */ + public int line; + } + + /** + * Returns the index into the code array at which the code for + * the specified line (or the nearest line after the specified one) + * begins. + * + * @param line the line number. + * @return a pair of the index and the line number of the + * bytecode at that index. + */ + public Pc toNearPc(int line) { + int n = tableLength(); + int nearPc = 0; + int distance = 0; + if (n > 0) { + distance = lineNumber(0) - line; + nearPc = startPc(0); + } + + for (int i = 1; i < n; ++i) { + int d = lineNumber(i) - line; + if ((d < 0 && d > distance) + || (d >= 0 && (d < distance || distance < 0))) { + distance = d; + nearPc = startPc(i); + } + } + + Pc res = new Pc(); + res.index = nearPc; + res.line = line + distance; + return res; + } + + /** + * Makes a copy. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames should be null. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + byte[] src = info; + int num = src.length; + byte[] dest = new byte[num]; + for (int i = 0; i < num; ++i) + dest[i] = src[i]; + + LineNumberAttribute attr = new LineNumberAttribute(newCp, dest); + return attr; + } + + /** + * Adjusts start_pc if bytecode is inserted in a method body. + */ + void shiftPc(int where, int gapLength, boolean exclusive) { + int n = tableLength(); + for (int i = 0; i < n; ++i) { + int pos = i * 4 + 2; + int pc = ByteArray.readU16bit(info, pos); + if (pc > where || (exclusive && pc == where)) + ByteArray.write16bit(pc + gapLength, info, pos); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java new file mode 100644 index 0000000..8ce0ccd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java @@ -0,0 +1,334 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * LocalVariableTable_attribute. + */ +public class LocalVariableAttribute extends AttributeInfo { + /** + * The name of this attribute "LocalVariableTable". + */ + public static final String tag = "LocalVariableTable"; + + /** + * The name of the attribute "LocalVariableTypeTable". + */ + public static final String typeTag = "LocalVariableTypeTable"; + + /** + * Constructs an empty LocalVariableTable. + */ + public LocalVariableAttribute(ConstPool cp) { + super(cp, tag, new byte[2]); + ByteArray.write16bit(0, info, 0); + } + + /** + * Constructs an empty LocalVariableTable. + * + * @param name the attribute name. + * LocalVariableAttribute.tag or + * LocalVariableAttribute.typeTag. + * @see #tag + * @see #typeTag + * @since 3.1 + * @deprecated + */ + public LocalVariableAttribute(ConstPool cp, String name) { + super(cp, name, new byte[2]); + ByteArray.write16bit(0, info, 0); + } + + LocalVariableAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + LocalVariableAttribute(ConstPool cp, String name, byte[] i) { + super(cp, name, i); + } + + /** + * Appends a new entry to local_variable_table. + * + * @param startPc start_pc + * @param length length + * @param nameIndex name_index + * @param descriptorIndex descriptor_index + * @param index index + */ + public void addEntry(int startPc, int length, int nameIndex, + int descriptorIndex, int index) { + int size = info.length; + byte[] newInfo = new byte[size + 10]; + ByteArray.write16bit(tableLength() + 1, newInfo, 0); + for (int i = 2; i < size; ++i) + newInfo[i] = info[i]; + + ByteArray.write16bit(startPc, newInfo, size); + ByteArray.write16bit(length, newInfo, size + 2); + ByteArray.write16bit(nameIndex, newInfo, size + 4); + ByteArray.write16bit(descriptorIndex, newInfo, size + 6); + ByteArray.write16bit(index, newInfo, size + 8); + info = newInfo; + } + + void renameClass(String oldname, String newname) { + ConstPool cp = getConstPool(); + int n = tableLength(); + for (int i = 0; i < n; ++i) { + int pos = i * 10 + 2; + int index = ByteArray.readU16bit(info, pos + 6); + if (index != 0) { + String desc = cp.getUtf8Info(index); + desc = renameEntry(desc, oldname, newname); + ByteArray.write16bit(cp.addUtf8Info(desc), info, pos + 6); + } + } + } + + String renameEntry(String desc, String oldname, String newname) { + return Descriptor.rename(desc, oldname, newname); + } + + void renameClass(Map classnames) { + ConstPool cp = getConstPool(); + int n = tableLength(); + for (int i = 0; i < n; ++i) { + int pos = i * 10 + 2; + int index = ByteArray.readU16bit(info, pos + 6); + if (index != 0) { + String desc = cp.getUtf8Info(index); + desc = renameEntry(desc, classnames); + ByteArray.write16bit(cp.addUtf8Info(desc), info, pos + 6); + } + } + } + + String renameEntry(String desc, Map classnames) { + return Descriptor.rename(desc, classnames); + } + + /** + * For each local_variable_table[i].index, + * this method increases index by delta. + * + * @param lessThan the index does not change if it + * is less than this value. + */ + public void shiftIndex(int lessThan, int delta) { + int size = info.length; + for (int i = 2; i < size; i += 10){ + int org = ByteArray.readU16bit(info, i + 8); + if (org >= lessThan) + ByteArray.write16bit(org + delta, info, i + 8); + } + } + + /** + * Returns local_variable_table_length. + * This represents the number of entries in the table. + */ + public int tableLength() { + return ByteArray.readU16bit(info, 0); + } + + /** + * Returns local_variable_table[i].start_pc. + * This represents the index into the code array from which the local + * variable is effective. + * + * @param i the i-th entry. + */ + public int startPc(int i) { + return ByteArray.readU16bit(info, i * 10 + 2); + } + + /** + * Returns local_variable_table[i].length. + * This represents the length of the code region in which the local + * variable is effective. + * + * @param i the i-th entry. + */ + public int codeLength(int i) { + return ByteArray.readU16bit(info, i * 10 + 4); + } + + /** + * Adjusts start_pc and length if bytecode is inserted in a method body. + */ + void shiftPc(int where, int gapLength, boolean exclusive) { + int n = tableLength(); + for (int i = 0; i < n; ++i) { + int pos = i * 10 + 2; + int pc = ByteArray.readU16bit(info, pos); + int len = ByteArray.readU16bit(info, pos + 2); + + /* if pc == 0, then the local variable is a method parameter. + */ + if (pc > where || (exclusive && pc == where && pc != 0)) + ByteArray.write16bit(pc + gapLength, info, pos); + else if (pc + len > where || (exclusive && pc + len == where)) + ByteArray.write16bit(len + gapLength, info, pos + 2); + } + } + + /** + * Returns the value of local_variable_table[i].name_index. + * This represents the name of the local variable. + * + * @param i the i-th entry. + */ + public int nameIndex(int i) { + return ByteArray.readU16bit(info, i * 10 + 6); + } + + /** + * Returns the name of the local variable + * specified by local_variable_table[i].name_index. + * + * @param i the i-th entry. + */ + public String variableName(int i) { + return getConstPool().getUtf8Info(nameIndex(i)); + } + + /** + * Returns the value of + * local_variable_table[i].descriptor_index. + * This represents the type descriptor of the local variable. + *

+ * If this attribute represents a LocalVariableTypeTable attribute, + * this method returns the value of + * local_variable_type_table[i].signature_index. + * It represents the type of the local variable. + * + * @param i the i-th entry. + */ + public int descriptorIndex(int i) { + return ByteArray.readU16bit(info, i * 10 + 8); + } + + /** + * This method is equivalent to descriptorIndex(). + * If this attribute represents a LocalVariableTypeTable attribute, + * this method should be used instead of descriptorIndex() + * since the method name is more appropriate. + * + * @param i the i-th entry. + * @see #descriptorIndex(int) + * @see SignatureAttribute#toFieldSignature(String) + */ + public int signatureIndex(int i) { + return descriptorIndex(i); + } + + /** + * Returns the type descriptor of the local variable + * specified by local_variable_table[i].descriptor_index. + *

+ * If this attribute represents a LocalVariableTypeTable attribute, + * this method returns the type signature of the local variable + * specified by local_variable_type_table[i].signature_index. + * + * @param i the i-th entry. + */ + public String descriptor(int i) { + return getConstPool().getUtf8Info(descriptorIndex(i)); + } + + /** + * This method is equivalent to descriptor(). + * If this attribute represents a LocalVariableTypeTable attribute, + * this method should be used instead of descriptor() + * since the method name is more appropriate. + * + *

To parse the string, call toFieldSignature(String) + * in SignatureAttribute. + * + * @param i the i-th entry. + * @see #descriptor(int) + * @see SignatureAttribute#toFieldSignature(String) + */ + public String signature(int i) { + return descriptor(i); + } + + /** + * Returns local_variable_table[i].index. + * This represents the index of the local variable. + * + * @param i the i-th entry. + */ + public int index(int i) { + return ByteArray.readU16bit(info, i * 10 + 10); + } + + /** + * Makes a copy. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames should be null. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + byte[] src = get(); + byte[] dest = new byte[src.length]; + ConstPool cp = getConstPool(); + LocalVariableAttribute attr = makeThisAttr(newCp, dest); + int n = ByteArray.readU16bit(src, 0); + ByteArray.write16bit(n, dest, 0); + int j = 2; + for (int i = 0; i < n; ++i) { + int start = ByteArray.readU16bit(src, j); + int len = ByteArray.readU16bit(src, j + 2); + int name = ByteArray.readU16bit(src, j + 4); + int type = ByteArray.readU16bit(src, j + 6); + int index = ByteArray.readU16bit(src, j + 8); + + ByteArray.write16bit(start, dest, j); + ByteArray.write16bit(len, dest, j + 2); + if (name != 0) + name = cp.copy(name, newCp, null); + + ByteArray.write16bit(name, dest, j + 4); + + if (type != 0) { + String sig = cp.getUtf8Info(type); + sig = Descriptor.rename(sig, classnames); + type = newCp.addUtf8Info(sig); + } + + ByteArray.write16bit(type, dest, j + 6); + ByteArray.write16bit(index, dest, j + 8); + j += 10; + } + + return attr; + } + + // LocalVariableTypeAttribute overrides this method. + LocalVariableAttribute makeThisAttr(ConstPool cp, byte[] dest) { + return new LocalVariableAttribute(cp, tag, dest); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java new file mode 100644 index 0000000..57bd395 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java @@ -0,0 +1,63 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * LocalVariableTypeTable_attribute. + * + * @since 3.11 + */ +public class LocalVariableTypeAttribute extends LocalVariableAttribute { + /** + * The name of the attribute "LocalVariableTypeTable". + */ + public static final String tag = LocalVariableAttribute.typeTag; + + /** + * Constructs an empty LocalVariableTypeTable. + */ + public LocalVariableTypeAttribute(ConstPool cp) { + super(cp, tag, new byte[2]); + ByteArray.write16bit(0, info, 0); + } + + LocalVariableTypeAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + private LocalVariableTypeAttribute(ConstPool cp, byte[] dest) { + super(cp, tag, dest); + } + + String renameEntry(String desc, String oldname, String newname) { + return SignatureAttribute.renameClass(desc, oldname, newname); + } + + String renameEntry(String desc, Map classnames) { + return SignatureAttribute.renameClass(desc, classnames); + } + + LocalVariableAttribute makeThisAttr(ConstPool cp, byte[] dest) { + return new LocalVariableTypeAttribute(cp, dest); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java new file mode 100644 index 0000000..16f40e2 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java @@ -0,0 +1,64 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +final class LongVector { + static final int ASIZE = 128; + static final int ABITS = 7; // ASIZE = 2^ABITS + static final int VSIZE = 8; + private ConstInfo[][] objects; + private int elements; + + public LongVector() { + objects = new ConstInfo[VSIZE][]; + elements = 0; + } + + public LongVector(int initialSize) { + int vsize = ((initialSize >> ABITS) & ~(VSIZE - 1)) + VSIZE; + objects = new ConstInfo[vsize][]; + elements = 0; + } + + public int size() { return elements; } + + public int capacity() { return objects.length * ASIZE; } + + public ConstInfo elementAt(int i) { + if (i < 0 || elements <= i) + return null; + + return objects[i >> ABITS][i & (ASIZE - 1)]; + } + + public void addElement(ConstInfo value) { + int nth = elements >> ABITS; + int offset = elements & (ASIZE - 1); + int len = objects.length; + if (nth >= len) { + ConstInfo[][] newObj = new ConstInfo[len + VSIZE][]; + System.arraycopy(objects, 0, newObj, 0, len); + objects = newObj; + } + + if (objects[nth] == null) + objects[nth] = new ConstInfo[ASIZE]; + + objects[nth][offset] = value; + elements++; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java new file mode 100644 index 0000000..dbe32ca --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java @@ -0,0 +1,566 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.Map; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.stackmap.MapMaker; + +/** + * method_info structure. + * + *

The bytecode sequence of the method is represented + * by a CodeAttribute object. + * + *

The following code adds the default constructor to a class: + * of int type: + * 

+ * ClassFile cf = ...
+ * Bytecode code = new Bytecode(cf.getConstPool());
+ * code.addAload(0);
+ * code.addInvokespecial("java/lang/Object", MethodInfo.nameInit, "()V");
+ * code.addReturn(null);
+ * code.setMaxLocals(1);
+ *
+ * MethodInfo minfo = new MethodInfo(cf.getConstPool(), MethodInfo.nameInit, "()V");
+ * minfo.setCodeAttribute(code.toCodeAttribute());
+ * cf.addMethod(minfo);
+ *
+ * + * @see #getCodeAttribute() + * @see CodeAttribute + * @see Bytecode + * @see javassist.CtMethod#getMethodInfo() + * @see javassist.CtConstructor#getMethodInfo() + */ +public class MethodInfo { + ConstPool constPool; + int accessFlags; + int name; + String cachedName; + int descriptor; + ArrayList attribute; // may be null + + /** + * If this value is true, Javassist maintains a StackMap attribute + * generated by the preverify tool of J2ME (CLDC). The initial + * value of this field is false. + */ + public static boolean doPreverify = false; + + /** + * The name of constructors: <init>. + */ + public static final String nameInit = ""; + + /** + * The name of class initializer (static initializer): + * <clinit>. + */ + public static final String nameClinit = ""; + + private MethodInfo(ConstPool cp) { + constPool = cp; + attribute = null; + } + + /** + * Constructs a method_info structure. The initial value of + * access_flags is zero. + * + * @param cp + * a constant pool table + * @param methodname + * method name + * @param desc + * method descriptor + * @see Descriptor + */ + public MethodInfo(ConstPool cp, String methodname, String desc) { + this(cp); + accessFlags = 0; + name = cp.addUtf8Info(methodname); + cachedName = methodname; + descriptor = constPool.addUtf8Info(desc); + } + + MethodInfo(ConstPool cp, DataInputStream in) throws IOException { + this(cp); + read(in); + } + + /** + * Constructs a copy of method_info structure. Class names + * appearing in the source method_info are renamed according + * to classnameMap. + * + *

+ * Note: only Code and Exceptions attributes + * are copied from the source. The other attributes are ignored. + * + * @param cp + * a constant pool table + * @param methodname + * a method name + * @param src + * a source method_info + * @param classnameMap + * specifies pairs of replaced and substituted name. + * @see Descriptor + */ + public MethodInfo(ConstPool cp, String methodname, MethodInfo src, + Map classnameMap) throws BadBytecode { + this(cp); + read(src, methodname, classnameMap); + } + + /** + * Returns a string representation of the object. + */ + public String toString() { + return getName() + " " + getDescriptor(); + } + + /** + * Copies all constant pool items to a given new constant pool + * and replaces the original items with the new ones. + * This is used for garbage collecting the items of removed fields + * and methods. + * + * @param cp the destination + */ + void compact(ConstPool cp) { + name = cp.addUtf8Info(getName()); + descriptor = cp.addUtf8Info(getDescriptor()); + attribute = AttributeInfo.copyAll(attribute, cp); + constPool = cp; + } + + void prune(ConstPool cp) { + ArrayList newAttributes = new ArrayList(); + + AttributeInfo invisibleAnnotations + = getAttribute(AnnotationsAttribute.invisibleTag); + if (invisibleAnnotations != null) { + invisibleAnnotations = invisibleAnnotations.copy(cp, null); + newAttributes.add(invisibleAnnotations); + } + + AttributeInfo visibleAnnotations + = getAttribute(AnnotationsAttribute.visibleTag); + if (visibleAnnotations != null) { + visibleAnnotations = visibleAnnotations.copy(cp, null); + newAttributes.add(visibleAnnotations); + } + + AttributeInfo parameterInvisibleAnnotations + = getAttribute(ParameterAnnotationsAttribute.invisibleTag); + if (parameterInvisibleAnnotations != null) { + parameterInvisibleAnnotations = parameterInvisibleAnnotations.copy(cp, null); + newAttributes.add(parameterInvisibleAnnotations); + } + + AttributeInfo parameterVisibleAnnotations + = getAttribute(ParameterAnnotationsAttribute.visibleTag); + if (parameterVisibleAnnotations != null) { + parameterVisibleAnnotations = parameterVisibleAnnotations.copy(cp, null); + newAttributes.add(parameterVisibleAnnotations); + } + + AnnotationDefaultAttribute defaultAttribute + = (AnnotationDefaultAttribute) getAttribute(AnnotationDefaultAttribute.tag); + if (defaultAttribute != null) + newAttributes.add(defaultAttribute); + + ExceptionsAttribute ea = getExceptionsAttribute(); + if (ea != null) + newAttributes.add(ea); + + AttributeInfo signature + = getAttribute(SignatureAttribute.tag); + if (signature != null) { + signature = signature.copy(cp, null); + newAttributes.add(signature); + } + + attribute = newAttributes; + name = cp.addUtf8Info(getName()); + descriptor = cp.addUtf8Info(getDescriptor()); + constPool = cp; + } + + /** + * Returns a method name. + */ + public String getName() { + if (cachedName == null) + cachedName = constPool.getUtf8Info(name); + + return cachedName; + } + + /** + * Sets a method name. + */ + public void setName(String newName) { + name = constPool.addUtf8Info(newName); + cachedName = newName; + } + + /** + * Returns true if this is not a constructor or a class initializer (static + * initializer). + */ + public boolean isMethod() { + String n = getName(); + return !n.equals(nameInit) && !n.equals(nameClinit); + } + + /** + * Returns a constant pool table used by this method. + */ + public ConstPool getConstPool() { + return constPool; + } + + /** + * Returns true if this is a constructor. + */ + public boolean isConstructor() { + return getName().equals(nameInit); + } + + /** + * Returns true if this is a class initializer (static initializer). + */ + public boolean isStaticInitializer() { + return getName().equals(nameClinit); + } + + /** + * Returns access flags. + * + * @see AccessFlag + */ + public int getAccessFlags() { + return accessFlags; + } + + /** + * Sets access flags. + * + * @see AccessFlag + */ + public void setAccessFlags(int acc) { + accessFlags = acc; + } + + /** + * Returns a method descriptor. + * + * @see Descriptor + */ + public String getDescriptor() { + return constPool.getUtf8Info(descriptor); + } + + /** + * Sets a method descriptor. + * + * @see Descriptor + */ + public void setDescriptor(String desc) { + if (!desc.equals(getDescriptor())) + descriptor = constPool.addUtf8Info(desc); + } + + /** + * Returns all the attributes. The returned List object + * is shared with this object. If you add a new attribute to the list, + * the attribute is also added to the method represented by this + * object. If you remove an attribute from the list, it is also removed + * from the method. + * + * @return a list of AttributeInfo objects. + * @see AttributeInfo + */ + public List getAttributes() { + if (attribute == null) + attribute = new ArrayList(); + + return attribute; + } + + /** + * Returns the attribute with the specified name. If it is not found, this + * method returns null. + * + * @param name attribute name + * @return an AttributeInfo object or null. + * @see #getAttributes() + */ + public AttributeInfo getAttribute(String name) { + return AttributeInfo.lookup(attribute, name); + } + + /** + * Appends an attribute. If there is already an attribute with the same + * name, the new one substitutes for it. + * + * @see #getAttributes() + */ + public void addAttribute(AttributeInfo info) { + if (attribute == null) + attribute = new ArrayList(); + + AttributeInfo.remove(attribute, info.getName()); + attribute.add(info); + } + + /** + * Returns an Exceptions attribute. + * + * @return an Exceptions attribute or null if it is not specified. + */ + public ExceptionsAttribute getExceptionsAttribute() { + AttributeInfo info = AttributeInfo.lookup(attribute, + ExceptionsAttribute.tag); + return (ExceptionsAttribute)info; + } + + /** + * Returns a Code attribute. + * + * @return a Code attribute or null if it is not specified. + */ + public CodeAttribute getCodeAttribute() { + AttributeInfo info = AttributeInfo.lookup(attribute, CodeAttribute.tag); + return (CodeAttribute)info; + } + + /** + * Removes an Exception attribute. + */ + public void removeExceptionsAttribute() { + AttributeInfo.remove(attribute, ExceptionsAttribute.tag); + } + + /** + * Adds an Exception attribute. + * + *

+ * The added attribute must share the same constant pool table as this + * method_info structure. + */ + public void setExceptionsAttribute(ExceptionsAttribute cattr) { + removeExceptionsAttribute(); + if (attribute == null) + attribute = new ArrayList(); + + attribute.add(cattr); + } + + /** + * Removes a Code attribute. + */ + public void removeCodeAttribute() { + AttributeInfo.remove(attribute, CodeAttribute.tag); + } + + /** + * Adds a Code attribute. + * + *

+ * The added attribute must share the same constant pool table as this + * method_info structure. + */ + public void setCodeAttribute(CodeAttribute cattr) { + removeCodeAttribute(); + if (attribute == null) + attribute = new ArrayList(); + + attribute.add(cattr); + } + + /** + * Rebuilds a stack map table if the class file is for Java 6 + * or later. Java 5 or older Java VMs do not recognize a stack + * map table. If doPreverify is true, this method + * also rebuilds a stack map for J2ME (CLDC). + * + * @param pool used for making type hierarchy. + * @param cf rebuild if this class file is for Java 6 or later. + * @see #rebuildStackMap(ClassPool) + * @see #rebuildStackMapForME(ClassPool) + * @see #doPreverify + * @since 3.6 + */ + public void rebuildStackMapIf6(ClassPool pool, ClassFile cf) + throws BadBytecode + { + if (cf.getMajorVersion() >= ClassFile.JAVA_6) + rebuildStackMap(pool); + + if (doPreverify) + rebuildStackMapForME(pool); + } + + /** + * Rebuilds a stack map table. If no stack map table is included, + * a new one is created. If this MethodInfo does not + * include a code attribute, nothing happens. + * + * @param pool used for making type hierarchy. + * @see StackMapTable + * @since 3.6 + */ + public void rebuildStackMap(ClassPool pool) throws BadBytecode { + CodeAttribute ca = getCodeAttribute(); + if (ca != null) { + StackMapTable smt = MapMaker.make(pool, this); + ca.setAttribute(smt); + } + } + + /** + * Rebuilds a stack map table for J2ME (CLDC). If no stack map table is included, + * a new one is created. If this MethodInfo does not + * include a code attribute, nothing happens. + * + * @param pool used for making type hierarchy. + * @see StackMap + * @since 3.12 + */ + public void rebuildStackMapForME(ClassPool pool) throws BadBytecode { + CodeAttribute ca = getCodeAttribute(); + if (ca != null) { + StackMap sm = MapMaker.make2(pool, this); + ca.setAttribute(sm); + } + } + + /** + * Returns the line number of the source line corresponding to the specified + * bytecode contained in this method. + * + * @param pos + * the position of the bytecode (>= 0). an index into the code + * array. + * @return -1 if this information is not available. + */ + public int getLineNumber(int pos) { + CodeAttribute ca = getCodeAttribute(); + if (ca == null) + return -1; + + LineNumberAttribute ainfo = (LineNumberAttribute)ca + .getAttribute(LineNumberAttribute.tag); + if (ainfo == null) + return -1; + + return ainfo.toLineNumber(pos); + } + + /** + * Changes a super constructor called by this constructor. + * + *

+ * This method modifies a call to super(), which should be + * at the head of a constructor body, so that a constructor in a different + * super class is called. This method does not change actual parameters. + * Hence the new super class must have a constructor with the same signature + * as the original one. + * + *

+ * This method should be called when the super class of the class declaring + * this method is changed. + * + *

+ * This method does not perform anything unless this MethodInfo + * represents a constructor. + * + * @param superclass + * the new super class + */ + public void setSuperclass(String superclass) throws BadBytecode { + if (!isConstructor()) + return; + + CodeAttribute ca = getCodeAttribute(); + byte[] code = ca.getCode(); + CodeIterator iterator = ca.iterator(); + int pos = iterator.skipSuperConstructor(); + if (pos >= 0) { // not this() + ConstPool cp = constPool; + int mref = ByteArray.readU16bit(code, pos + 1); + int nt = cp.getMethodrefNameAndType(mref); + int sc = cp.addClassInfo(superclass); + int mref2 = cp.addMethodrefInfo(sc, nt); + ByteArray.write16bit(mref2, code, pos + 1); + } + } + + private void read(MethodInfo src, String methodname, Map classnames) + throws BadBytecode { + ConstPool destCp = constPool; + accessFlags = src.accessFlags; + name = destCp.addUtf8Info(methodname); + cachedName = methodname; + ConstPool srcCp = src.constPool; + String desc = srcCp.getUtf8Info(src.descriptor); + String desc2 = Descriptor.rename(desc, classnames); + descriptor = destCp.addUtf8Info(desc2); + + attribute = new ArrayList(); + ExceptionsAttribute eattr = src.getExceptionsAttribute(); + if (eattr != null) + attribute.add(eattr.copy(destCp, classnames)); + + CodeAttribute cattr = src.getCodeAttribute(); + if (cattr != null) + attribute.add(cattr.copy(destCp, classnames)); + } + + private void read(DataInputStream in) throws IOException { + accessFlags = in.readUnsignedShort(); + name = in.readUnsignedShort(); + descriptor = in.readUnsignedShort(); + int n = in.readUnsignedShort(); + attribute = new ArrayList(); + for (int i = 0; i < n; ++i) + attribute.add(AttributeInfo.read(constPool, in)); + } + + void write(DataOutputStream out) throws IOException { + out.writeShort(accessFlags); + out.writeShort(name); + out.writeShort(descriptor); + + if (attribute == null) + out.writeShort(0); + else { + out.writeShort(attribute.size()); + AttributeInfo.writeAll(attribute, out); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java new file mode 100644 index 0000000..67ed7f6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java @@ -0,0 +1,87 @@ +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * MethodParameters_attribute. + */ +public class MethodParametersAttribute extends AttributeInfo { + /** + * The name of this attribute "MethodParameters". + */ + public static final String tag = "MethodParameters"; + + MethodParametersAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs an attribute. + * + * @param cp a constant pool table. + * @param names an array of parameter names. + * The i-th element is the name of the i-th parameter. + * @param flags an array of parameter access flags. + */ + public MethodParametersAttribute(ConstPool cp, String[] names, int[] flags) { + super(cp, tag); + byte[] data = new byte[names.length * 4 + 1]; + data[0] = (byte)names.length; + for (int i = 0; i < names.length; i++) { + ByteArray.write16bit(cp.addUtf8Info(names[i]), data, i * 4 + 1); + ByteArray.write16bit(flags[i], data, i * 4 + 3); + } + + set(data); + } + + /** + * Returns parameters_count, which is the number of + * parameters. + */ + public int size() { + return info[0] & 0xff; + } + + /** + * Returns the value of name_index of the i-th element of parameters. + * + * @param i the position of the parameter. + */ + public int name(int i) { + return ByteArray.readU16bit(info, i * 4 + 1); + } + + /** + * Returns the value of access_flags of the i-th element of parameters. + * + * @param i the position of the parameter. + * @see AccessFlag + */ + public int accessFlags(int i) { + return ByteArray.readU16bit(info, i * 4 + 3); + } + + /** + * Makes a copy. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames ignored. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + int s = size(); + ConstPool cp = getConstPool(); + String[] names = new String[s]; + int[] flags = new int[s]; + for (int i = 0; i < s; i++) { + names[i] = cp.getUtf8Info(name(i)); + flags[i] = accessFlags(i); + } + + return new MethodParametersAttribute(newCp, names, flags); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java new file mode 100644 index 0000000..d5e465d --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java @@ -0,0 +1,239 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * JVM Instruction Names. + * + *

This interface has been separated from javassist.bytecode.Opcode + * because typical bytecode translators do not use mnemonics. If this + * interface were merged with Opcode, extra memory would be unnecessary + * consumed. + * + * @see Opcode + */ +public interface Mnemonic { + + /** + * The instruction names (mnemonics) sorted by the opcode. + * The length of this array is 202 (jsr_w=201). + */ + String[] OPCODE = { + "nop", /* 0*/ + "aconst_null", /* 1*/ + "iconst_m1", /* 2*/ + "iconst_0", /* 3*/ + "iconst_1", /* 4*/ + "iconst_2", /* 5*/ + "iconst_3", /* 6*/ + "iconst_4", /* 7*/ + "iconst_5", /* 8*/ + "lconst_0", /* 9*/ + "lconst_1", /* 10*/ + "fconst_0", /* 11*/ + "fconst_1", /* 12*/ + "fconst_2", /* 13*/ + "dconst_0", /* 14*/ + "dconst_1", /* 15*/ + "bipush", /* 16*/ + "sipush", /* 17*/ + "ldc", /* 18*/ + "ldc_w", /* 19*/ + "ldc2_w", /* 20*/ + "iload", /* 21*/ + "lload", /* 22*/ + "fload", /* 23*/ + "dload", /* 24*/ + "aload", /* 25*/ + "iload_0", /* 26*/ + "iload_1", /* 27*/ + "iload_2", /* 28*/ + "iload_3", /* 29*/ + "lload_0", /* 30*/ + "lload_1", /* 31*/ + "lload_2", /* 32*/ + "lload_3", /* 33*/ + "fload_0", /* 34*/ + "fload_1", /* 35*/ + "fload_2", /* 36*/ + "fload_3", /* 37*/ + "dload_0", /* 38*/ + "dload_1", /* 39*/ + "dload_2", /* 40*/ + "dload_3", /* 41*/ + "aload_0", /* 42*/ + "aload_1", /* 43*/ + "aload_2", /* 44*/ + "aload_3", /* 45*/ + "iaload", /* 46*/ + "laload", /* 47*/ + "faload", /* 48*/ + "daload", /* 49*/ + "aaload", /* 50*/ + "baload", /* 51*/ + "caload", /* 52*/ + "saload", /* 53*/ + "istore", /* 54*/ + "lstore", /* 55*/ + "fstore", /* 56*/ + "dstore", /* 57*/ + "astore", /* 58*/ + "istore_0", /* 59*/ + "istore_1", /* 60*/ + "istore_2", /* 61*/ + "istore_3", /* 62*/ + "lstore_0", /* 63*/ + "lstore_1", /* 64*/ + "lstore_2", /* 65*/ + "lstore_3", /* 66*/ + "fstore_0", /* 67*/ + "fstore_1", /* 68*/ + "fstore_2", /* 69*/ + "fstore_3", /* 70*/ + "dstore_0", /* 71*/ + "dstore_1", /* 72*/ + "dstore_2", /* 73*/ + "dstore_3", /* 74*/ + "astore_0", /* 75*/ + "astore_1", /* 76*/ + "astore_2", /* 77*/ + "astore_3", /* 78*/ + "iastore", /* 79*/ + "lastore", /* 80*/ + "fastore", /* 81*/ + "dastore", /* 82*/ + "aastore", /* 83*/ + "bastore", /* 84*/ + "castore", /* 85*/ + "sastore", /* 86*/ + "pop", /* 87*/ + "pop2", /* 88*/ + "dup", /* 89*/ + "dup_x1", /* 90*/ + "dup_x2", /* 91*/ + "dup2", /* 92*/ + "dup2_x1", /* 93*/ + "dup2_x2", /* 94*/ + "swap", /* 95*/ + "iadd", /* 96*/ + "ladd", /* 97*/ + "fadd", /* 98*/ + "dadd", /* 99*/ + "isub", /* 100*/ + "lsub", /* 101*/ + "fsub", /* 102*/ + "dsub", /* 103*/ + "imul", /* 104*/ + "lmul", /* 105*/ + "fmul", /* 106*/ + "dmul", /* 107*/ + "idiv", /* 108*/ + "ldiv", /* 109*/ + "fdiv", /* 110*/ + "ddiv", /* 111*/ + "irem", /* 112*/ + "lrem", /* 113*/ + "frem", /* 114*/ + "drem", /* 115*/ + "ineg", /* 116*/ + "lneg", /* 117*/ + "fneg", /* 118*/ + "dneg", /* 119*/ + "ishl", /* 120*/ + "lshl", /* 121*/ + "ishr", /* 122*/ + "lshr", /* 123*/ + "iushr", /* 124*/ + "lushr", /* 125*/ + "iand", /* 126*/ + "land", /* 127*/ + "ior", /* 128*/ + "lor", /* 129*/ + "ixor", /* 130*/ + "lxor", /* 131*/ + "iinc", /* 132*/ + "i2l", /* 133*/ + "i2f", /* 134*/ + "i2d", /* 135*/ + "l2i", /* 136*/ + "l2f", /* 137*/ + "l2d", /* 138*/ + "f2i", /* 139*/ + "f2l", /* 140*/ + "f2d", /* 141*/ + "d2i", /* 142*/ + "d2l", /* 143*/ + "d2f", /* 144*/ + "i2b", /* 145*/ + "i2c", /* 146*/ + "i2s", /* 147*/ + "lcmp", /* 148*/ + "fcmpl", /* 149*/ + "fcmpg", /* 150*/ + "dcmpl", /* 151*/ + "dcmpg", /* 152*/ + "ifeq", /* 153*/ + "ifne", /* 154*/ + "iflt", /* 155*/ + "ifge", /* 156*/ + "ifgt", /* 157*/ + "ifle", /* 158*/ + "if_icmpeq", /* 159*/ + "if_icmpne", /* 160*/ + "if_icmplt", /* 161*/ + "if_icmpge", /* 162*/ + "if_icmpgt", /* 163*/ + "if_icmple", /* 164*/ + "if_acmpeq", /* 165*/ + "if_acmpne", /* 166*/ + "goto", /* 167*/ + "jsr", /* 168*/ + "ret", /* 169*/ + "tableswitch", /* 170*/ + "lookupswitch", /* 171*/ + "ireturn", /* 172*/ + "lreturn", /* 173*/ + "freturn", /* 174*/ + "dreturn", /* 175*/ + "areturn", /* 176*/ + "return", /* 177*/ + "getstatic", /* 178*/ + "putstatic", /* 179*/ + "getfield", /* 180*/ + "putfield", /* 181*/ + "invokevirtual", /* 182*/ + "invokespecial", /* 183*/ + "invokestatic", /* 184*/ + "invokeinterface", /* 185*/ + "invokedynamic", /* 186 */ + "new", /* 187*/ + "newarray", /* 188*/ + "anewarray", /* 189*/ + "arraylength", /* 190*/ + "athrow", /* 191*/ + "checkcast", /* 192*/ + "instanceof", /* 193*/ + "monitorenter", /* 194*/ + "monitorexit", /* 195*/ + "wide", /* 196*/ + "multianewarray", /* 197*/ + "ifnull", /* 198*/ + "ifnonnull", /* 199*/ + "goto_w", /* 200*/ + "jsr_w" /* 201*/ + }; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java new file mode 100644 index 0000000..0a8ea3a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java @@ -0,0 +1,449 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +/** + * JVM Instruction Set. + * + *

This interface defines opcodes and + * array types for the NEWARRAY instruction. + * + * @see Mnemonic + */ +public interface Opcode { + /* Opcodes */ + + int AALOAD = 50; + int AASTORE = 83; + int ACONST_NULL = 1; + int ALOAD = 25; + int ALOAD_0 = 42; + int ALOAD_1 = 43; + int ALOAD_2 = 44; + int ALOAD_3 = 45; + int ANEWARRAY = 189; + int ARETURN = 176; + int ARRAYLENGTH = 190; + int ASTORE = 58; + int ASTORE_0 = 75; + int ASTORE_1 = 76; + int ASTORE_2 = 77; + int ASTORE_3 = 78; + int ATHROW = 191; + int BALOAD = 51; + int BASTORE = 84; + int BIPUSH = 16; + int CALOAD = 52; + int CASTORE = 85; + int CHECKCAST = 192; + int D2F = 144; + int D2I = 142; + int D2L = 143; + int DADD = 99; + int DALOAD = 49; + int DASTORE = 82; + int DCMPG = 152; + int DCMPL = 151; + int DCONST_0 = 14; + int DCONST_1 = 15; + int DDIV = 111; + int DLOAD = 24; + int DLOAD_0 = 38; + int DLOAD_1 = 39; + int DLOAD_2 = 40; + int DLOAD_3 = 41; + int DMUL = 107; + int DNEG = 119; + int DREM = 115; + int DRETURN = 175; + int DSTORE = 57; + int DSTORE_0 = 71; + int DSTORE_1 = 72; + int DSTORE_2 = 73; + int DSTORE_3 = 74; + int DSUB = 103; + int DUP = 89; + int DUP2 = 92; + int DUP2_X1 = 93; + int DUP2_X2 = 94; + int DUP_X1 = 90; + int DUP_X2 = 91; + int F2D = 141; + int F2I = 139; + int F2L = 140; + int FADD = 98; + int FALOAD = 48; + int FASTORE = 81; + int FCMPG = 150; + int FCMPL = 149; + int FCONST_0 = 11; + int FCONST_1 = 12; + int FCONST_2 = 13; + int FDIV = 110; + int FLOAD = 23; + int FLOAD_0 = 34; + int FLOAD_1 = 35; + int FLOAD_2 = 36; + int FLOAD_3 = 37; + int FMUL = 106; + int FNEG = 118; + int FREM = 114; + int FRETURN = 174; + int FSTORE = 56; + int FSTORE_0 = 67; + int FSTORE_1 = 68; + int FSTORE_2 = 69; + int FSTORE_3 = 70; + int FSUB = 102; + int GETFIELD = 180; + int GETSTATIC = 178; + int GOTO = 167; + int GOTO_W = 200; + int I2B = 145; + int I2C = 146; + int I2D = 135; + int I2F = 134; + int I2L = 133; + int I2S = 147; + int IADD = 96; + int IALOAD = 46; + int IAND = 126; + int IASTORE = 79; + int ICONST_0 = 3; + int ICONST_1 = 4; + int ICONST_2 = 5; + int ICONST_3 = 6; + int ICONST_4 = 7; + int ICONST_5 = 8; + int ICONST_M1 = 2; + int IDIV = 108; + int IFEQ = 153; + int IFGE = 156; + int IFGT = 157; + int IFLE = 158; + int IFLT = 155; + int IFNE = 154; + int IFNONNULL = 199; + int IFNULL = 198; + int IF_ACMPEQ = 165; + int IF_ACMPNE = 166; + int IF_ICMPEQ = 159; + int IF_ICMPGE = 162; + int IF_ICMPGT = 163; + int IF_ICMPLE = 164; + int IF_ICMPLT = 161; + int IF_ICMPNE = 160; + int IINC = 132; + int ILOAD = 21; + int ILOAD_0 = 26; + int ILOAD_1 = 27; + int ILOAD_2 = 28; + int ILOAD_3 = 29; + int IMUL = 104; + int INEG = 116; + int INSTANCEOF = 193; + int INVOKEDYNAMIC = 186; + int INVOKEINTERFACE = 185; + int INVOKESPECIAL = 183; + int INVOKESTATIC = 184; + int INVOKEVIRTUAL = 182; + int IOR = 128; + int IREM = 112; + int IRETURN = 172; + int ISHL = 120; + int ISHR = 122; + int ISTORE = 54; + int ISTORE_0 = 59; + int ISTORE_1 = 60; + int ISTORE_2 = 61; + int ISTORE_3 = 62; + int ISUB = 100; + int IUSHR = 124; + int IXOR = 130; + int JSR = 168; + int JSR_W = 201; + int L2D = 138; + int L2F = 137; + int L2I = 136; + int LADD = 97; + int LALOAD = 47; + int LAND = 127; + int LASTORE = 80; + int LCMP = 148; + int LCONST_0 = 9; + int LCONST_1 = 10; + int LDC = 18; + int LDC2_W = 20; + int LDC_W = 19; + int LDIV = 109; + int LLOAD = 22; + int LLOAD_0 = 30; + int LLOAD_1 = 31; + int LLOAD_2 = 32; + int LLOAD_3 = 33; + int LMUL = 105; + int LNEG = 117; + int LOOKUPSWITCH = 171; + int LOR = 129; + int LREM = 113; + int LRETURN = 173; + int LSHL = 121; + int LSHR = 123; + int LSTORE = 55; + int LSTORE_0 = 63; + int LSTORE_1 = 64; + int LSTORE_2 = 65; + int LSTORE_3 = 66; + int LSUB = 101; + int LUSHR = 125; + int LXOR = 131; + int MONITORENTER = 194; + int MONITOREXIT = 195; + int MULTIANEWARRAY = 197; + int NEW = 187; + int NEWARRAY = 188; + int NOP = 0; + int POP = 87; + int POP2 = 88; + int PUTFIELD = 181; + int PUTSTATIC = 179; + int RET = 169; + int RETURN = 177; + int SALOAD = 53; + int SASTORE = 86; + int SIPUSH = 17; + int SWAP = 95; + int TABLESWITCH = 170; + int WIDE = 196; + + /* array-type code for the newarray instruction */ + + int T_BOOLEAN = 4; + int T_CHAR = 5; + int T_FLOAT = 6; + int T_DOUBLE = 7; + int T_BYTE = 8; + int T_SHORT = 9; + int T_INT = 10; + int T_LONG = 11; + + /* how many values are pushed on the operand stack. */ + int[] STACK_GROW = { + 0, // nop, 0 + 1, // aconst_null, 1 + 1, // iconst_m1, 2 + 1, // iconst_0, 3 + 1, // iconst_1, 4 + 1, // iconst_2, 5 + 1, // iconst_3, 6 + 1, // iconst_4, 7 + 1, // iconst_5, 8 + 2, // lconst_0, 9 + 2, // lconst_1, 10 + 1, // fconst_0, 11 + 1, // fconst_1, 12 + 1, // fconst_2, 13 + 2, // dconst_0, 14 + 2, // dconst_1, 15 + 1, // bipush, 16 + 1, // sipush, 17 + 1, // ldc, 18 + 1, // ldc_w, 19 + 2, // ldc2_w, 20 + 1, // iload, 21 + 2, // lload, 22 + 1, // fload, 23 + 2, // dload, 24 + 1, // aload, 25 + 1, // iload_0, 26 + 1, // iload_1, 27 + 1, // iload_2, 28 + 1, // iload_3, 29 + 2, // lload_0, 30 + 2, // lload_1, 31 + 2, // lload_2, 32 + 2, // lload_3, 33 + 1, // fload_0, 34 + 1, // fload_1, 35 + 1, // fload_2, 36 + 1, // fload_3, 37 + 2, // dload_0, 38 + 2, // dload_1, 39 + 2, // dload_2, 40 + 2, // dload_3, 41 + 1, // aload_0, 42 + 1, // aload_1, 43 + 1, // aload_2, 44 + 1, // aload_3, 45 + -1, // iaload, 46 + 0, // laload, 47 + -1, // faload, 48 + 0, // daload, 49 + -1, // aaload, 50 + -1, // baload, 51 + -1, // caload, 52 + -1, // saload, 53 + -1, // istore, 54 + -2, // lstore, 55 + -1, // fstore, 56 + -2, // dstore, 57 + -1, // astore, 58 + -1, // istore_0, 59 + -1, // istore_1, 60 + -1, // istore_2, 61 + -1, // istore_3, 62 + -2, // lstore_0, 63 + -2, // lstore_1, 64 + -2, // lstore_2, 65 + -2, // lstore_3, 66 + -1, // fstore_0, 67 + -1, // fstore_1, 68 + -1, // fstore_2, 69 + -1, // fstore_3, 70 + -2, // dstore_0, 71 + -2, // dstore_1, 72 + -2, // dstore_2, 73 + -2, // dstore_3, 74 + -1, // astore_0, 75 + -1, // astore_1, 76 + -1, // astore_2, 77 + -1, // astore_3, 78 + -3, // iastore, 79 + -4, // lastore, 80 + -3, // fastore, 81 + -4, // dastore, 82 + -3, // aastore, 83 + -3, // bastore, 84 + -3, // castore, 85 + -3, // sastore, 86 + -1, // pop, 87 + -2, // pop2, 88 + 1, // dup, 89 + 1, // dup_x1, 90 + 1, // dup_x2, 91 + 2, // dup2, 92 + 2, // dup2_x1, 93 + 2, // dup2_x2, 94 + 0, // swap, 95 + -1, // iadd, 96 + -2, // ladd, 97 + -1, // fadd, 98 + -2, // dadd, 99 + -1, // isub, 100 + -2, // lsub, 101 + -1, // fsub, 102 + -2, // dsub, 103 + -1, // imul, 104 + -2, // lmul, 105 + -1, // fmul, 106 + -2, // dmul, 107 + -1, // idiv, 108 + -2, // ldiv, 109 + -1, // fdiv, 110 + -2, // ddiv, 111 + -1, // irem, 112 + -2, // lrem, 113 + -1, // frem, 114 + -2, // drem, 115 + 0, // ineg, 116 + 0, // lneg, 117 + 0, // fneg, 118 + 0, // dneg, 119 + -1, // ishl, 120 + -1, // lshl, 121 + -1, // ishr, 122 + -1, // lshr, 123 + -1, // iushr, 124 + -1, // lushr, 125 + -1, // iand, 126 + -2, // land, 127 + -1, // ior, 128 + -2, // lor, 129 + -1, // ixor, 130 + -2, // lxor, 131 + 0, // iinc, 132 + 1, // i2l, 133 + 0, // i2f, 134 + 1, // i2d, 135 + -1, // l2i, 136 + -1, // l2f, 137 + 0, // l2d, 138 + 0, // f2i, 139 + 1, // f2l, 140 + 1, // f2d, 141 + -1, // d2i, 142 + 0, // d2l, 143 + -1, // d2f, 144 + 0, // i2b, 145 + 0, // i2c, 146 + 0, // i2s, 147 + -3, // lcmp, 148 + -1, // fcmpl, 149 + -1, // fcmpg, 150 + -3, // dcmpl, 151 + -3, // dcmpg, 152 + -1, // ifeq, 153 + -1, // ifne, 154 + -1, // iflt, 155 + -1, // ifge, 156 + -1, // ifgt, 157 + -1, // ifle, 158 + -2, // if_icmpeq, 159 + -2, // if_icmpne, 160 + -2, // if_icmplt, 161 + -2, // if_icmpge, 162 + -2, // if_icmpgt, 163 + -2, // if_icmple, 164 + -2, // if_acmpeq, 165 + -2, // if_acmpne, 166 + 0, // goto, 167 + 1, // jsr, 168 + 0, // ret, 169 + -1, // tableswitch, 170 + -1, // lookupswitch, 171 + -1, // ireturn, 172 + -2, // lreturn, 173 + -1, // freturn, 174 + -2, // dreturn, 175 + -1, // areturn, 176 + 0, // return, 177 + 0, // getstatic, 178 depends on the type + 0, // putstatic, 179 depends on the type + 0, // getfield, 180 depends on the type + 0, // putfield, 181 depends on the type + 0, // invokevirtual, 182 depends on the type + 0, // invokespecial, 183 depends on the type + 0, // invokestatic, 184 depends on the type + 0, // invokeinterface, 185 depends on the type + 0, // invokedynaimc, 186 depends on the type + 1, // new, 187 + 0, // newarray, 188 + 0, // anewarray, 189 + 0, // arraylength, 190 + -1, // athrow, 191 stack is cleared + 0, // checkcast, 192 + 0, // instanceof, 193 + -1, // monitorenter, 194 + -1, // monitorexit, 195 + 0, // wide, 196 depends on the following opcode + 0, // multianewarray, 197 depends on the dimensions + -1, // ifnull, 198 + -1, // ifnonnull, 199 + 0, // goto_w, 200 + 1 // jsr_w, 201 + }; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java new file mode 100644 index 0000000..cdefada --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java @@ -0,0 +1,215 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.util.HashMap; +import java.util.Map; +import java.io.IOException; +import java.io.DataInputStream; +import java.io.ByteArrayOutputStream; + +import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Copier; +import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Parser; +import com.wenshuo.agent.javassist.bytecode.AnnotationsAttribute.Renamer; +import com.wenshuo.agent.javassist.bytecode.annotation.*; + +/** + * A class representing RuntimeVisibleAnnotations_attribute and + * RuntimeInvisibleAnnotations_attribute. + * + *

To obtain an ParameterAnnotationAttribute object, invoke + * getAttribute(ParameterAnnotationsAttribute.invisibleTag) + * in MethodInfo. + * The obtained attribute is a + * runtime invisible annotations attribute. + * If the parameter is + * ParameterAnnotationAttribute.visibleTag, then the obtained + * attribute is a runtime visible one. + */ +public class ParameterAnnotationsAttribute extends AttributeInfo { + /** + * The name of the RuntimeVisibleParameterAnnotations + * attribute. + */ + public static final String visibleTag + = "RuntimeVisibleParameterAnnotations"; + + /** + * The name of the RuntimeInvisibleParameterAnnotations + * attribute. + */ + public static final String invisibleTag + = "RuntimeInvisibleParameterAnnotations"; + /** + * Constructs + * a Runtime(In)VisibleParameterAnnotations_attribute. + * + * @param cp constant pool + * @param attrname attribute name (visibleTag or + * invisibleTag). + * @param info the contents of this attribute. It does not + * include attribute_name_index or + * attribute_length. + */ + public ParameterAnnotationsAttribute(ConstPool cp, String attrname, + byte[] info) { + super(cp, attrname, info); + } + + /** + * Constructs an empty + * Runtime(In)VisibleParameterAnnotations_attribute. + * A new annotation can be later added to the created attribute + * by setAnnotations(). + * + * @param cp constant pool + * @param attrname attribute name (visibleTag or + * invisibleTag). + * @see #setAnnotations(Annotation[][]) + */ + public ParameterAnnotationsAttribute(ConstPool cp, String attrname) { + this(cp, attrname, new byte[] { 0 }); + } + + /** + * @param n the attribute name. + */ + ParameterAnnotationsAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Returns num_parameters. + */ + public int numParameters() { + return info[0] & 0xff; + } + + /** + * Copies this attribute and returns a new copy. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + Copier copier = new Copier(info, constPool, newCp, classnames); + try { + copier.parameters(); + return new ParameterAnnotationsAttribute(newCp, getName(), + copier.close()); + } + catch (Exception e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Parses the annotations and returns a data structure representing + * that parsed annotations. Note that changes of the node values of the + * returned tree are not reflected on the annotations represented by + * this object unless the tree is copied back to this object by + * setAnnotations(). + * + * @return Each element of the returned array represents an array of + * annotations that are associated with each method parameter. + * + * @see #setAnnotations(Annotation[][]) + */ + public Annotation[][] getAnnotations() { + try { + return new Parser(info, constPool).parseParameters(); + } + catch (Exception e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Changes the annotations represented by this object according to + * the given array of Annotation objects. + * + * @param params the data structure representing the + * new annotations. Every element of this array + * is an array of Annotation and + * it represens annotations of each method parameter. + */ + public void setAnnotations(Annotation[][] params) { + ByteArrayOutputStream output = new ByteArrayOutputStream(); + AnnotationsWriter writer = new AnnotationsWriter(output, constPool); + try { + int n = params.length; + writer.numParameters(n); + for (int i = 0; i < n; ++i) { + Annotation[] anno = params[i]; + writer.numAnnotations(anno.length); + for (int j = 0; j < anno.length; ++j) + anno[j].write(writer); + } + + writer.close(); + } + catch (IOException e) { + throw new RuntimeException(e); // should never reach here. + } + + set(output.toByteArray()); + } + + /** + * @param oldname a JVM class name. + * @param newname a JVM class name. + */ + void renameClass(String oldname, String newname) { + HashMap map = new HashMap(); + map.put(oldname, newname); + renameClass(map); + } + + void renameClass(Map classnames) { + Renamer renamer = new Renamer(info, getConstPool(), classnames); + try { + renamer.parameters(); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + void getRefClasses(Map classnames) { renameClass(classnames); } + + /** + * Returns a string representation of this object. + */ + public String toString() { + Annotation[][] aa = getAnnotations(); + StringBuilder sbuf = new StringBuilder(); + int k = 0; + while (k < aa.length) { + Annotation[] a = aa[k++]; + int i = 0; + while (i < a.length) { + sbuf.append(a[i++].toString()); + if (i != a.length) + sbuf.append(" "); + } + + if (k != aa.length) + sbuf.append(", "); + } + + return sbuf.toString(); + + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java new file mode 100644 index 0000000..f560505 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java @@ -0,0 +1,1160 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; +import java.util.ArrayList; +import com.wenshuo.agent.javassist.CtClass; + +/** + * Signature_attribute. + */ +public class SignatureAttribute extends AttributeInfo { + /** + * The name of this attribute "Signature". + */ + public static final String tag = "Signature"; + + SignatureAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a Signature attribute. + * + * @param cp a constant pool table. + * @param signature the signature represented by this attribute. + */ + public SignatureAttribute(ConstPool cp, String signature) { + super(cp, tag); + int index = cp.addUtf8Info(signature); + byte[] bvalue = new byte[2]; + bvalue[0] = (byte)(index >>> 8); + bvalue[1] = (byte)index; + set(bvalue); + } + + /** + * Returns the generic signature indicated by signature_index. + * + * @see #toClassSignature(String) + * @see #toMethodSignature(String) + * @see #toFieldSignature(String) + */ + public String getSignature() { + return getConstPool().getUtf8Info(ByteArray.readU16bit(get(), 0)); + } + + /** + * Sets signature_index to the index of the given generic signature, + * which is added to a constant pool. + * + * @param sig new signature. + * @since 3.11 + */ + public void setSignature(String sig) { + int index = getConstPool().addUtf8Info(sig); + ByteArray.write16bit(index, info, 0); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + return new SignatureAttribute(newCp, getSignature()); + } + + void renameClass(String oldname, String newname) { + String sig = renameClass(getSignature(), oldname, newname); + setSignature(sig); + } + + void renameClass(Map classnames) { + String sig = renameClass(getSignature(), classnames); + setSignature(sig); + } + + static String renameClass(String desc, String oldname, String newname) { + Map map = new java.util.HashMap(); + map.put(oldname, newname); + return renameClass(desc, map); + } + + static String renameClass(String desc, Map map) { + if (map == null) + return desc; + + StringBuilder newdesc = new StringBuilder(); + int head = 0; + int i = 0; + for (;;) { + int j = desc.indexOf('L', i); + if (j < 0) + break; + + StringBuilder nameBuf = new StringBuilder(); + int k = j; + char c; + try { + while ((c = desc.charAt(++k)) != ';') { + nameBuf.append(c); + if (c == '<') { + while ((c = desc.charAt(++k)) != '>') + nameBuf.append(c); + + nameBuf.append(c); + } + } + } + catch (IndexOutOfBoundsException e) { break; } + i = k + 1; + String name = nameBuf.toString(); + String name2 = (String)map.get(name); + if (name2 != null) { + newdesc.append(desc.substring(head, j)); + newdesc.append('L'); + newdesc.append(name2); + newdesc.append(c); + head = i; + } + } + + if (head == 0) + return desc; + else { + int len = desc.length(); + if (head < len) + newdesc.append(desc.substring(head, len)); + + return newdesc.toString(); + } + } + + private static boolean isNamePart(int c) { + return c != ';' && c != '<'; + } + + static private class Cursor { + int position = 0; + + int indexOf(String s, int ch) throws BadBytecode { + int i = s.indexOf(ch, position); + if (i < 0) + throw error(s); + else { + position = i + 1; + return i; + } + } + } + + /** + * Class signature. + */ + public static class ClassSignature { + TypeParameter[] params; + ClassType superClass; + ClassType[] interfaces; + + /** + * Constructs a class signature. + * + * @param params type parameters. + * @param superClass the super class. + * @param interfaces the interface types. + */ + public ClassSignature(TypeParameter[] params, ClassType superClass, ClassType[] interfaces) { + this.params = params == null ? new TypeParameter[0] : params; + this.superClass = superClass == null ? ClassType.OBJECT : superClass; + this.interfaces = interfaces == null ? new ClassType[0] : interfaces; + } + + /** + * Constructs a class signature. + * + * @param p type parameters. + */ + public ClassSignature(TypeParameter[] p) { + this(p, null, null); + } + + /** + * Returns the type parameters. + * + * @return a zero-length array if the type parameters are not specified. + */ + public TypeParameter[] getParameters() { + return params; + } + + /** + * Returns the super class. + */ + public ClassType getSuperClass() { return superClass; } + + /** + * Returns the super interfaces. + * + * @return a zero-length array if the super interfaces are not specified. + */ + public ClassType[] getInterfaces() { return interfaces; } + + /** + * Returns the string representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(); + + TypeParameter.toString(sbuf, params); + sbuf.append(" extends ").append(superClass); + if (interfaces.length > 0) { + sbuf.append(" implements "); + Type.toString(sbuf, interfaces); + } + + return sbuf.toString(); + } + + /** + * Returns the encoded string representing the method type signature. + */ + public String encode() { + StringBuffer sbuf = new StringBuffer(); + if (params.length > 0) { + sbuf.append('<'); + for (int i = 0; i < params.length; i++) + params[i].encode(sbuf); + + sbuf.append('>'); + } + + superClass.encode(sbuf); + for (int i = 0; i < interfaces.length; i++) + interfaces[i].encode(sbuf); + + return sbuf.toString(); + } + } + + /** + * Method type signature. + */ + public static class MethodSignature { + TypeParameter[] typeParams; + Type[] params; + Type retType; + ObjectType[] exceptions; + + /** + * Constructs a method type signature. Any parameter can be null + * to represent void or nothing. + * + * @param tp type parameters. + * @param params parameter types. + * @param ret a return type, or null if the return type is void. + * @param ex exception types. + */ + public MethodSignature(TypeParameter[] tp, Type[] params, Type ret, ObjectType[] ex) { + typeParams = tp == null ? new TypeParameter[0] : tp; + this.params = params == null ? new Type[0] : params; + retType = ret == null ? new BaseType("void") : ret; + exceptions = ex == null ? new ObjectType[0] : ex; + } + + /** + * Returns the formal type parameters. + * + * @return a zero-length array if the type parameters are not specified. + */ + public TypeParameter[] getTypeParameters() { return typeParams; } + + /** + * Returns the types of the formal parameters. + * + * @return a zero-length array if no formal parameter is taken. + */ + public Type[] getParameterTypes() { return params; } + + /** + * Returns the type of the returned value. + */ + public Type getReturnType() { return retType; } + + /** + * Returns the types of the exceptions that may be thrown. + * + * @return a zero-length array if exceptions are never thrown or + * the exception types are not parameterized types or type variables. + */ + public ObjectType[] getExceptionTypes() { return exceptions; } + + /** + * Returns the string representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(); + + TypeParameter.toString(sbuf, typeParams); + sbuf.append(" ("); + Type.toString(sbuf, params); + sbuf.append(") "); + sbuf.append(retType); + if (exceptions.length > 0) { + sbuf.append(" throws "); + Type.toString(sbuf, exceptions); + } + + return sbuf.toString(); + } + + /** + * Returns the encoded string representing the method type signature. + */ + public String encode() { + StringBuffer sbuf = new StringBuffer(); + if (typeParams.length > 0) { + sbuf.append('<'); + for (int i = 0; i < typeParams.length; i++) + typeParams[i].encode(sbuf); + + sbuf.append('>'); + } + + sbuf.append('('); + for (int i = 0; i < params.length; i++) + params[i].encode(sbuf); + + sbuf.append(')'); + retType.encode(sbuf); + if (exceptions.length > 0) + for (int i = 0; i < exceptions.length; i++) { + sbuf.append('^'); + exceptions[i].encode(sbuf); + } + + return sbuf.toString(); + } + } + + /** + * Formal type parameters. + * + * @see TypeArgument + */ + public static class TypeParameter { + String name; + ObjectType superClass; + ObjectType[] superInterfaces; + + TypeParameter(String sig, int nb, int ne, ObjectType sc, ObjectType[] si) { + name = sig.substring(nb, ne); + superClass = sc; + superInterfaces = si; + } + + /** + * Constructs a TypeParameter representing a type parametre + * like <T extends ... >. + * + * @param name parameter name. + * @param superClass an upper bound class-type (or null). + * @param superInterfaces an upper bound interface-type (or null). + */ + public TypeParameter(String name, ObjectType superClass, ObjectType[] superInterfaces) { + this.name = name; + this.superClass = superClass; + if (superInterfaces == null) + this.superInterfaces = new ObjectType[0]; + else + this.superInterfaces = superInterfaces; + } + + /** + * Constructs a TypeParameter representing a type parameter + * like <T>. + * + * @param name parameter name. + */ + public TypeParameter(String name) { + this(name, null, null); + } + + /** + * Returns the name of the type parameter. + */ + public String getName() { + return name; + } + + /** + * Returns the class bound of this parameter. + */ + public ObjectType getClassBound() { return superClass; } + + /** + * Returns the interface bound of this parameter. + * + * @return a zero-length array if the interface bound is not specified. + */ + public ObjectType[] getInterfaceBound() { return superInterfaces; } + + /** + * Returns the string representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(getName()); + if (superClass != null) + sbuf.append(" extends ").append(superClass.toString()); + + int len = superInterfaces.length; + if (len > 0) { + for (int i = 0; i < len; i++) { + if (i > 0 || superClass != null) + sbuf.append(" & "); + else + sbuf.append(" extends "); + + sbuf.append(superInterfaces[i].toString()); + } + } + + return sbuf.toString(); + } + + static void toString(StringBuffer sbuf, TypeParameter[] tp) { + sbuf.append('<'); + for (int i = 0; i < tp.length; i++) { + if (i > 0) + sbuf.append(", "); + + sbuf.append(tp[i]); + } + + sbuf.append('>'); + } + + void encode(StringBuffer sb) { + sb.append(name); + if (superClass == null) + sb.append(":Ljava/lang/Object;"); + else { + sb.append(':'); + superClass.encode(sb); + } + + for (int i = 0; i < superInterfaces.length; i++) { + sb.append(':'); + superInterfaces[i].encode(sb); + } + } + } + + /** + * Type argument. + * + * @see TypeParameter + */ + public static class TypeArgument { + ObjectType arg; + char wildcard; + + TypeArgument(ObjectType a, char w) { + arg = a; + wildcard = w; + } + + /** + * Constructs a TypeArgument. + * A type argument is <String>, <int[]>, + * or a type variable <T>, etc. + * + * @param t a class type, an array type, or a type variable. + */ + public TypeArgument(ObjectType t) { + this(t, ' '); + } + + /** + * Constructs a TypeArgument representing <?>. + */ + public TypeArgument() { + this(null, '*'); + } + + /** + * A factory method constructing a TypeArgument with an upper bound. + * It represents <? extends ... > + * + * @param t an upper bound type. + */ + public static TypeArgument subclassOf(ObjectType t) { + return new TypeArgument(t, '+'); + } + + /** + * A factory method constructing a TypeArgument with an lower bound. + * It represents <? super ... > + * + * @param t an lower bbound type. + */ + public static TypeArgument superOf(ObjectType t) { + return new TypeArgument(t, '-'); + } + + /** + * Returns the kind of this type argument. + * + * @return ' ' (not-wildcard), '*' (wildcard), '+' (wildcard with + * upper bound), or '-' (wildcard with lower bound). + */ + public char getKind() { return wildcard; } + + /** + * Returns true if this type argument is a wildcard type + * such as ?, ? extends String, or ? super Integer. + */ + public boolean isWildcard() { return wildcard != ' '; } + + /** + * Returns the type represented by this argument + * if the argument is not a wildcard type. Otherwise, this method + * returns the upper bound (if the kind is '+'), + * the lower bound (if the kind is '-'), or null (if the upper or lower + * bound is not specified). + */ + public ObjectType getType() { return arg; } + + /** + * Returns the string representation. + */ + public String toString() { + if (wildcard == '*') + return "?"; + + String type = arg.toString(); + if (wildcard == ' ') + return type; + else if (wildcard == '+') + return "? extends " + type; + else + return "? super " + type; + } + + static void encode(StringBuffer sb, TypeArgument[] args) { + sb.append('<'); + for (int i = 0; i < args.length; i++) { + TypeArgument ta = args[i]; + if (ta.isWildcard()) + sb.append(ta.wildcard); + + if (ta.getType() != null) + ta.getType().encode(sb); + } + + sb.append('>'); + } + } + + /** + * Primitive types and object types. + */ + public static abstract class Type { + abstract void encode(StringBuffer sb); + static void toString(StringBuffer sbuf, Type[] ts) { + for (int i = 0; i < ts.length; i++) { + if (i > 0) + sbuf.append(", "); + + sbuf.append(ts[i]); + } + } + + /** + * Returns the type name in the JVM internal style. + * For example, if the type is a nested class {@code foo.Bar.Baz}, + * then {@code foo.Bar$Baz} is returned. + */ + public String jvmTypeName() { return toString(); } + } + + /** + * Primitive types. + */ + public static class BaseType extends Type { + char descriptor; + BaseType(char c) { descriptor = c; } + + /** + * Constructs a BaseType. + * + * @param typeName void, int, ... + */ + public BaseType(String typeName) { + this(Descriptor.of(typeName).charAt(0)); + } + + /** + * Returns the descriptor representing this primitive type. + * + * @see javassist.bytecode.Descriptor + */ + public char getDescriptor() { return descriptor; } + + /** + * Returns the CtClass representing this + * primitive type. + */ + public CtClass getCtlass() { + return Descriptor.toPrimitiveClass(descriptor); + } + + /** + * Returns the string representation. + */ + public String toString() { + return Descriptor.toClassName(Character.toString(descriptor)); + } + + void encode(StringBuffer sb) { + sb.append(descriptor); + } + } + + /** + * Class types, array types, and type variables. + * This class is also used for representing a field type. + */ + public static abstract class ObjectType extends Type { + /** + * Returns the encoded string representing the object type signature. + */ + public String encode() { + StringBuffer sb = new StringBuffer(); + encode(sb); + return sb.toString(); + } + } + + /** + * Class types. + */ + public static class ClassType extends ObjectType { + String name; + TypeArgument[] arguments; + + static ClassType make(String s, int b, int e, + TypeArgument[] targs, ClassType parent) { + if (parent == null) + return new ClassType(s, b, e, targs); + else + return new NestedClassType(s, b, e, targs, parent); + } + + ClassType(String signature, int begin, int end, TypeArgument[] targs) { + name = signature.substring(begin, end).replace('/', '.'); + arguments = targs; + } + + /** + * A class type representing java.lang.Object. + */ + public static ClassType OBJECT = new ClassType("java.lang.Object", null); + + /** + * Constructs a ClassType. It represents + * the name of a non-nested class. + * + * @param className a fully qualified class name. + * @param args type arguments or null. + */ + public ClassType(String className, TypeArgument[] args) { + name = className; + arguments = args; + } + + /** + * Constructs a ClassType. It represents + * the name of a non-nested class. + * + * @param className a fully qualified class name. + */ + public ClassType(String className) { + this(className, null); + } + + /** + * Returns the class name. + */ + public String getName() { + return name; + } + + /** + * Returns the type arguments. + * + * @return null if no type arguments are given to this class. + */ + public TypeArgument[] getTypeArguments() { return arguments; } + + /** + * If this class is a member of another class, returns the + * class in which this class is declared. + * + * @return null if this class is not a member of another class. + */ + public ClassType getDeclaringClass() { return null; } + + /** + * Returns the string representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(); + ClassType parent = getDeclaringClass(); + if (parent != null) + sbuf.append(parent.toString()).append('.'); + + return toString2(sbuf); + } + + private String toString2(StringBuffer sbuf) { + sbuf.append(name); + if (arguments != null) { + sbuf.append('<'); + int n = arguments.length; + for (int i = 0; i < n; i++) { + if (i > 0) + sbuf.append(", "); + + sbuf.append(arguments[i].toString()); + } + + sbuf.append('>'); + } + + return sbuf.toString(); + } + + /** + * Returns the type name in the JVM internal style. + * For example, if the type is a nested class {@code foo.Bar.Baz}, + * then {@code foo.Bar$Baz} is returned. + */ + public String jvmTypeName() { + StringBuffer sbuf = new StringBuffer(); + ClassType parent = getDeclaringClass(); + if (parent != null) + sbuf.append(parent.jvmTypeName()).append('$'); + + return toString2(sbuf); + } + + void encode(StringBuffer sb) { + sb.append('L'); + encode2(sb); + sb.append(';'); + } + + void encode2(StringBuffer sb) { + ClassType parent = getDeclaringClass(); + if (parent != null) { + parent.encode2(sb); + sb.append('$'); + } + + sb.append(name.replace('.', '/')); + if (arguments != null) + TypeArgument.encode(sb, arguments); + } + } + + /** + * Nested class types. + */ + public static class NestedClassType extends ClassType { + ClassType parent; + NestedClassType(String s, int b, int e, + TypeArgument[] targs, ClassType p) { + super(s, b, e, targs); + parent = p; + } + + /** + * Constructs a NestedClassType. + * + * @param parent the class surrounding this class type. + * @param className a simple class name. It does not include + * a package name or a parent's class name. + * @param args type parameters or null. + */ + public NestedClassType(ClassType parent, String className, TypeArgument[] args) { + super(className, args); + this.parent = parent; + } + + /** + * Returns the class that declares this nested class. + * This nested class is a member of that declaring class. + */ + public ClassType getDeclaringClass() { return parent; } + } + + /** + * Array types. + */ + public static class ArrayType extends ObjectType { + int dim; + Type componentType; + + /** + * Constructs an ArrayType. + * + * @param d dimension. + * @param comp the component type. + */ + public ArrayType(int d, Type comp) { + dim = d; + componentType = comp; + } + + /** + * Returns the dimension of the array. + */ + public int getDimension() { return dim; } + + /** + * Returns the component type. + */ + public Type getComponentType() { + return componentType; + } + + /** + * Returns the string representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(componentType.toString()); + for (int i = 0; i < dim; i++) + sbuf.append("[]"); + + return sbuf.toString(); + } + + void encode(StringBuffer sb) { + for (int i = 0; i < dim; i++) + sb.append('['); + + componentType.encode(sb); + } + } + + /** + * Type variables. + */ + public static class TypeVariable extends ObjectType { + String name; + + TypeVariable(String sig, int begin, int end) { + name = sig.substring(begin, end); + } + + /** + * Constructs a TypeVariable. + * + * @param name the name of a type variable. + */ + public TypeVariable(String name) { + this.name = name; + } + + /** + * Returns the variable name. + */ + public String getName() { + return name; + } + + /** + * Returns the string representation. + */ + public String toString() { + return name; + } + + void encode(StringBuffer sb) { + sb.append('T').append(name).append(';'); + } + } + + /** + * Parses the given signature string as a class signature. + * + * @param sig the signature obtained from the SignatureAttribute + * of a ClassFile. + * @return a tree-like data structure representing a class signature. It provides + * convenient accessor methods. + * @throws BadBytecode thrown when a syntactical error is found. + * @see #getSignature() + * @since 3.5 + */ + public static ClassSignature toClassSignature(String sig) throws BadBytecode { + try { + return parseSig(sig); + } + catch (IndexOutOfBoundsException e) { + throw error(sig); + } + } + + /** + * Parses the given signature string as a method type signature. + * + * @param sig the signature obtained from the SignatureAttribute + * of a MethodInfo. + * @return @return a tree-like data structure representing a method signature. It provides + * convenient accessor methods. + * @throws BadBytecode thrown when a syntactical error is found. + * @see #getSignature() + * @since 3.5 + */ + public static MethodSignature toMethodSignature(String sig) throws BadBytecode { + try { + return parseMethodSig(sig); + } + catch (IndexOutOfBoundsException e) { + throw error(sig); + } + } + + /** + * Parses the given signature string as a field type signature. + * + * @param sig the signature string obtained from the SignatureAttribute + * of a FieldInfo. + * @return the field type signature. + * @throws BadBytecode thrown when a syntactical error is found. + * @see #getSignature() + * @since 3.5 + */ + public static ObjectType toFieldSignature(String sig) throws BadBytecode { + try { + return parseObjectType(sig, new Cursor(), false); + } + catch (IndexOutOfBoundsException e) { + throw error(sig); + } + } + + /** + * Parses the given signature string as a type signature. + * The type signature is either the field type signature or a base type + * descriptor including void type. + * + * @throws BadBytecode thrown when a syntactical error is found. + * @since 3.18 + */ + public static Type toTypeSignature(String sig) throws BadBytecode { + try { + return parseType(sig, new Cursor()); + } + catch (IndexOutOfBoundsException e) { + throw error(sig); + } + } + + private static ClassSignature parseSig(String sig) + throws BadBytecode, IndexOutOfBoundsException + { + Cursor cur = new Cursor(); + TypeParameter[] tp = parseTypeParams(sig, cur); + ClassType superClass = parseClassType(sig, cur); + int sigLen = sig.length(); + ArrayList ifArray = new ArrayList(); + while (cur.position < sigLen && sig.charAt(cur.position) == 'L') + ifArray.add(parseClassType(sig, cur)); + + ClassType[] ifs + = (ClassType[])ifArray.toArray(new ClassType[ifArray.size()]); + return new ClassSignature(tp, superClass, ifs); + } + + private static MethodSignature parseMethodSig(String sig) + throws BadBytecode + { + Cursor cur = new Cursor(); + TypeParameter[] tp = parseTypeParams(sig, cur); + if (sig.charAt(cur.position++) != '(') + throw error(sig); + + ArrayList params = new ArrayList(); + while (sig.charAt(cur.position) != ')') { + Type t = parseType(sig, cur); + params.add(t); + } + + cur.position++; + Type ret = parseType(sig, cur); + int sigLen = sig.length(); + ArrayList exceptions = new ArrayList(); + while (cur.position < sigLen && sig.charAt(cur.position) == '^') { + cur.position++; + ObjectType t = parseObjectType(sig, cur, false); + if (t instanceof ArrayType) + throw error(sig); + + exceptions.add(t); + } + + Type[] p = (Type[])params.toArray(new Type[params.size()]); + ObjectType[] ex = (ObjectType[])exceptions.toArray(new ObjectType[exceptions.size()]); + return new MethodSignature(tp, p, ret, ex); + } + + private static TypeParameter[] parseTypeParams(String sig, Cursor cur) + throws BadBytecode + { + ArrayList typeParam = new ArrayList(); + if (sig.charAt(cur.position) == '<') { + cur.position++; + while (sig.charAt(cur.position) != '>') { + int nameBegin = cur.position; + int nameEnd = cur.indexOf(sig, ':'); + ObjectType classBound = parseObjectType(sig, cur, true); + ArrayList ifBound = new ArrayList(); + while (sig.charAt(cur.position) == ':') { + cur.position++; + ObjectType t = parseObjectType(sig, cur, false); + ifBound.add(t); + } + + TypeParameter p = new TypeParameter(sig, nameBegin, nameEnd, + classBound, (ObjectType[])ifBound.toArray(new ObjectType[ifBound.size()])); + typeParam.add(p); + } + + cur.position++; + } + + return (TypeParameter[])typeParam.toArray(new TypeParameter[typeParam.size()]); + } + + private static ObjectType parseObjectType(String sig, Cursor c, boolean dontThrow) + throws BadBytecode + { + int i; + int begin = c.position; + switch (sig.charAt(begin)) { + case 'L' : + return parseClassType2(sig, c, null); + case 'T' : + i = c.indexOf(sig, ';'); + return new TypeVariable(sig, begin + 1, i); + case '[' : + return parseArray(sig, c); + default : + if (dontThrow) + return null; + else + throw error(sig); + } + } + + private static ClassType parseClassType(String sig, Cursor c) + throws BadBytecode + { + if (sig.charAt(c.position) == 'L') + return parseClassType2(sig, c, null); + else + throw error(sig); + } + + private static ClassType parseClassType2(String sig, Cursor c, ClassType parent) + throws BadBytecode + { + int start = ++c.position; + char t; + do { + t = sig.charAt(c.position++); + } while (t != '$' && t != '<' && t != ';'); + int end = c.position - 1; + TypeArgument[] targs; + if (t == '<') { + targs = parseTypeArgs(sig, c); + t = sig.charAt(c.position++); + } + else + targs = null; + + ClassType thisClass = ClassType.make(sig, start, end, targs, parent); + if (t == '$' || t == '.') { + c.position--; + return parseClassType2(sig, c, thisClass); + } + else + return thisClass; + } + + private static TypeArgument[] parseTypeArgs(String sig, Cursor c) throws BadBytecode { + ArrayList args = new ArrayList(); + char t; + while ((t = sig.charAt(c.position++)) != '>') { + TypeArgument ta; + if (t == '*' ) + ta = new TypeArgument(null, '*'); + else { + if (t != '+' && t != '-') { + t = ' '; + c.position--; + } + + ta = new TypeArgument(parseObjectType(sig, c, false), t); + } + + args.add(ta); + } + + return (TypeArgument[])args.toArray(new TypeArgument[args.size()]); + } + + private static ObjectType parseArray(String sig, Cursor c) throws BadBytecode { + int dim = 1; + while (sig.charAt(++c.position) == '[') + dim++; + + return new ArrayType(dim, parseType(sig, c)); + } + + private static Type parseType(String sig, Cursor c) throws BadBytecode { + Type t = parseObjectType(sig, c, true); + if (t == null) + t = new BaseType(sig.charAt(c.position++)); + + return t; + } + + private static BadBytecode error(String sig) { + return new BadBytecode("bad signature: " + sig); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java new file mode 100644 index 0000000..3f16225 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java @@ -0,0 +1,71 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * SourceFile_attribute. + */ +public class SourceFileAttribute extends AttributeInfo { + /** + * The name of this attribute "SourceFile". + */ + public static final String tag = "SourceFile"; + + SourceFileAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a SourceFile attribute. + * + * @param cp a constant pool table. + * @param filename the name of the source file. + */ + public SourceFileAttribute(ConstPool cp, String filename) { + super(cp, tag); + int index = cp.addUtf8Info(filename); + byte[] bvalue = new byte[2]; + bvalue[0] = (byte)(index >>> 8); + bvalue[1] = (byte)index; + set(bvalue); + } + + /** + * Returns the file name indicated by sourcefile_index. + */ + public String getFileName() { + return getConstPool().getUtf8Info(ByteArray.readU16bit(get(), 0)); + } + + /** + * Makes a copy. Class names are replaced according to the + * given Map object. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames pairs of replaced and substituted + * class names. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + return new SourceFileAttribute(newCp, getFileName()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java new file mode 100644 index 0000000..541d6cd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java @@ -0,0 +1,576 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.ByteArrayOutputStream; +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.bytecode.StackMapTable.InsertLocal; +import com.wenshuo.agent.javassist.bytecode.StackMapTable.NewRemover; +import com.wenshuo.agent.javassist.bytecode.StackMapTable.Shifter; + +/** + * Another stack_map attribute defined in CLDC 1.1 for J2ME. + * + *

This is an entry in the attributes table of a Code attribute. + * It was introduced by J2ME CLDC 1.1 (JSR 139) for pre-verification. + * + *

According to the CLDC specification, the sizes of some fields are not 16bit + * but 32bit if the code size is more than 64K or the number of the local variables + * is more than 64K. However, for the J2ME CLDC technology, they are always 16bit. + * The implementation of the StackMap class assumes they are 16bit. + * + * @see MethodInfo#doPreverify + * @see StackMapTable + * @since 3.12 + */ +public class StackMap extends AttributeInfo { + /** + * The name of this attribute "StackMap". + */ + public static final String tag = "StackMap"; + + + /** + * Constructs a stack_map attribute. + */ + StackMap(ConstPool cp, byte[] newInfo) { + super(cp, tag, newInfo); + } + + StackMap(ConstPool cp, int name_id, DataInputStream in) + throws IOException + { + super(cp, name_id, in); + } + + /** + * Returns number_of_entries. + */ + public int numOfEntries() { + return ByteArray.readU16bit(info, 0); + } + + /** + * Top_variable_info.tag. + */ + public static final int TOP = 0; + + /** + * Integer_variable_info.tag. + */ + public static final int INTEGER = 1; + + /** + * Float_variable_info.tag. + */ + public static final int FLOAT = 2; + + /** + * Double_variable_info.tag. + */ + public static final int DOUBLE = 3; + + /** + * Long_variable_info.tag. + */ + public static final int LONG = 4; + + /** + * Null_variable_info.tag. + */ + public static final int NULL = 5; + + /** + * UninitializedThis_variable_info.tag. + */ + public static final int THIS = 6; + + /** + * Object_variable_info.tag. + */ + public static final int OBJECT = 7; + + /** + * Uninitialized_variable_info.tag. + */ + public static final int UNINIT = 8; + + /** + * Makes a copy. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + Copier copier = new Copier(this, newCp, classnames); + copier.visit(); + return copier.getStackMap(); + } + + /** + * A code walker for a StackMap attribute. + */ + public static class Walker { + byte[] info; + + /** + * Constructs a walker. + */ + public Walker(StackMap sm) { + info = sm.get(); + } + + /** + * Visits each entry of the stack map frames. + */ + public void visit() { + int num = ByteArray.readU16bit(info, 0); + int pos = 2; + for (int i = 0; i < num; i++) { + int offset = ByteArray.readU16bit(info, pos); + int numLoc = ByteArray.readU16bit(info, pos + 2); + pos = locals(pos + 4, offset, numLoc); + int numStack = ByteArray.readU16bit(info, pos); + pos = stack(pos + 2, offset, numStack); + } + } + + /** + * Invoked when locals of stack_map_frame + * is visited. + */ + public int locals(int pos, int offset, int num) { + return typeInfoArray(pos, offset, num, true); + } + + /** + * Invoked when stack of stack_map_frame + * is visited. + */ + public int stack(int pos, int offset, int num) { + return typeInfoArray(pos, offset, num, false); + } + + /** + * Invoked when an array of verification_type_info is + * visited. + * + * @param num the number of elements. + * @param isLocals true if this array is for locals. + * false if it is for stack. + */ + public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { + for (int k = 0; k < num; k++) + pos = typeInfoArray2(k, pos); + + return pos; + } + + int typeInfoArray2(int k, int pos) { + byte tag = info[pos]; + if (tag == OBJECT) { + int clazz = ByteArray.readU16bit(info, pos + 1); + objectVariable(pos, clazz); + pos += 3; + } + else if (tag == UNINIT) { + int offsetOfNew = ByteArray.readU16bit(info, pos + 1); + uninitialized(pos, offsetOfNew); + pos += 3; + } + else { + typeInfo(pos, tag); + pos++; + } + + return pos; + } + + /** + * Invoked when an element of verification_type_info + * (except Object_variable_info and + * Uninitialized_variable_info) is visited. + */ + public void typeInfo(int pos, byte tag) {} + + /** + * Invoked when an element of type Object_variable_info + * is visited. + */ + public void objectVariable(int pos, int clazz) {} + + /** + * Invoked when an element of type Uninitialized_variable_info + * is visited. + */ + public void uninitialized(int pos, int offset) {} + } + + static class Copier extends Walker { + byte[] dest; + ConstPool srcCp, destCp; + Map classnames; + + Copier(StackMap map, ConstPool newCp, Map classnames) { + super(map); + srcCp = map.getConstPool(); + dest = new byte[info.length]; + destCp = newCp; + this.classnames = classnames; + } + + public void visit() { + int num = ByteArray.readU16bit(info, 0); + ByteArray.write16bit(num, dest, 0); + super.visit(); + } + + public int locals(int pos, int offset, int num) { + ByteArray.write16bit(offset, dest, pos - 4); + return super.locals(pos, offset, num); + } + + public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { + ByteArray.write16bit(num, dest, pos - 2); + return super.typeInfoArray(pos, offset, num, isLocals); + } + + public void typeInfo(int pos, byte tag) { + dest[pos] = tag; + } + + public void objectVariable(int pos, int clazz) { + dest[pos] = OBJECT; + int newClazz = srcCp.copy(clazz, destCp, classnames); + ByteArray.write16bit(newClazz, dest, pos + 1); + } + + public void uninitialized(int pos, int offset) { + dest[pos] = UNINIT; + ByteArray.write16bit(offset, dest, pos + 1); + } + + public StackMap getStackMap() { + return new StackMap(destCp, dest); + } + } + + /** + * Updates this stack map table when a new local variable is inserted + * for a new parameter. + * + * @param index the index of the added local variable. + * @param tag the type tag of that local variable. + * It is available by StackMapTable.typeTagOf(char). + * @param classInfo the index of the CONSTANT_Class_info structure + * in a constant pool table. This should be zero unless the tag + * is ITEM_Object. + * + * @see javassist.CtBehavior#addParameter(javassist.CtClass) + * @see StackMapTable#typeTagOf(char) + * @see ConstPool + */ + public void insertLocal(int index, int tag, int classInfo) + throws BadBytecode + { + byte[] data = new InsertLocal(this, index, tag, classInfo).doit(); + this.set(data); + } + + static class SimpleCopy extends Walker { + Writer writer; + + SimpleCopy(StackMap map) { + super(map); + writer = new Writer(); + } + + byte[] doit() { + visit(); + return writer.toByteArray(); + } + + public void visit() { + int num = ByteArray.readU16bit(info, 0); + writer.write16bit(num); + super.visit(); + } + + public int locals(int pos, int offset, int num) { + writer.write16bit(offset); + return super.locals(pos, offset, num); + } + + public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { + writer.write16bit(num); + return super.typeInfoArray(pos, offset, num, isLocals); + } + + public void typeInfo(int pos, byte tag) { + writer.writeVerifyTypeInfo(tag, 0); + } + + public void objectVariable(int pos, int clazz) { + writer.writeVerifyTypeInfo(OBJECT, clazz); + } + + public void uninitialized(int pos, int offset) { + writer.writeVerifyTypeInfo(UNINIT, offset); + } + } + + static class InsertLocal extends SimpleCopy { + private int varIndex; + private int varTag, varData; + + InsertLocal(StackMap map, int varIndex, int varTag, int varData) { + super(map); + this.varIndex = varIndex; + this.varTag = varTag; + this.varData = varData; + } + + public int typeInfoArray(int pos, int offset, int num, boolean isLocals) { + if (!isLocals || num < varIndex) + return super.typeInfoArray(pos, offset, num, isLocals); + + writer.write16bit(num + 1); + for (int k = 0; k < num; k++) { + if (k == varIndex) + writeVarTypeInfo(); + + pos = typeInfoArray2(k, pos); + } + + if (num == varIndex) + writeVarTypeInfo(); + + return pos; + } + + private void writeVarTypeInfo() { + if (varTag == OBJECT) + writer.writeVerifyTypeInfo(OBJECT, varData); + else if (varTag == UNINIT) + writer.writeVerifyTypeInfo(UNINIT, varData); + else + writer.writeVerifyTypeInfo(varTag, 0); + } + } + + void shiftPc(int where, int gapSize, boolean exclusive) + throws BadBytecode + { + new Shifter(this, where, gapSize, exclusive).visit(); + } + + static class Shifter extends Walker { + private int where, gap; + private boolean exclusive; + + public Shifter(StackMap smt, int where, int gap, boolean exclusive) { + super(smt); + this.where = where; + this.gap = gap; + this.exclusive = exclusive; + } + + public int locals(int pos, int offset, int num) { + if (exclusive ? where <= offset : where < offset) + ByteArray.write16bit(offset + gap, info, pos - 4); + + return super.locals(pos, offset, num); + } + + public void uninitialized(int pos, int offset) { + if (where <= offset) + ByteArray.write16bit(offset + gap, info, pos + 1); + } + } + + /** + * @see CodeIterator.Switcher#adjustOffsets(int, int) + */ + void shiftForSwitch(int where, int gapSize) throws BadBytecode { + new SwitchShifter(this, where, gapSize).visit(); + } + + static class SwitchShifter extends Walker { + private int where, gap; + + public SwitchShifter(StackMap smt, int where, int gap) { + super(smt); + this.where = where; + this.gap = gap; + } + + public int locals(int pos, int offset, int num) { + if (where == pos + offset) + ByteArray.write16bit(offset - gap, info, pos - 4); + else if (where == pos) + ByteArray.write16bit(offset + gap, info, pos - 4); + + return super.locals(pos, offset, num); + } + } + + /** + * Undocumented method. Do not use; internal-use only. + * + *

This method is for javassist.convert.TransformNew. + * It is called to update the stack map when + * the NEW opcode (and the following DUP) is removed. + * + * @param where the position of the removed NEW opcode. + */ + public void removeNew(int where) throws CannotCompileException { + byte[] data = new NewRemover(this, where).doit(); + this.set(data); + } + + static class NewRemover extends SimpleCopy { + int posOfNew; + + NewRemover(StackMap map, int where) { + super(map); + posOfNew = where; + } + + public int stack(int pos, int offset, int num) { + return stackTypeInfoArray(pos, offset, num); + } + + private int stackTypeInfoArray(int pos, int offset, int num) { + int p = pos; + int count = 0; + for (int k = 0; k < num; k++) { + byte tag = info[p]; + if (tag == OBJECT) + p += 3; + else if (tag == UNINIT) { + int offsetOfNew = ByteArray.readU16bit(info, p + 1); + if (offsetOfNew == posOfNew) + count++; + + p += 3; + } + else + p++; + } + + writer.write16bit(num - count); + for (int k = 0; k < num; k++) { + byte tag = info[pos]; + if (tag == OBJECT) { + int clazz = ByteArray.readU16bit(info, pos + 1); + objectVariable(pos, clazz); + pos += 3; + } + else if (tag == UNINIT) { + int offsetOfNew = ByteArray.readU16bit(info, pos + 1); + if (offsetOfNew != posOfNew) + uninitialized(pos, offsetOfNew); + + pos += 3; + } + else { + typeInfo(pos, tag); + pos++; + } + } + + return pos; + } + } + + /** + * Prints this stack map. + */ + public void print(java.io.PrintWriter out) { + new Printer(this, out).print(); + } + + static class Printer extends Walker { + private java.io.PrintWriter writer; + + public Printer(StackMap map, java.io.PrintWriter out) { + super(map); + writer = out; + } + + public void print() { + int num = ByteArray.readU16bit(info, 0); + writer.println(num + " entries"); + visit(); + } + + public int locals(int pos, int offset, int num) { + writer.println(" * offset " + offset); + return super.locals(pos, offset, num); + } + } + + /** + * Internal use only. + */ + public static class Writer { + // see javassist.bytecode.stackmap.MapMaker + + private ByteArrayOutputStream output; + + /** + * Constructs a writer. + */ + public Writer() { + output = new ByteArrayOutputStream(); + } + + /** + * Converts the written data into a byte array. + */ + public byte[] toByteArray() { + return output.toByteArray(); + } + + /** + * Converts to a StackMap attribute. + */ + public StackMap toStackMap(ConstPool cp) { + return new StackMap(cp, output.toByteArray()); + } + + /** + * Writes a union verification_type_info value. + * + * @param data cpool_index or offset. + */ + public void writeVerifyTypeInfo(int tag, int data) { + output.write(tag); + if (tag == StackMap.OBJECT || tag == StackMap.UNINIT) + write16bit(data); + } + + /** + * Writes a 16bit value. + */ + public void write16bit(int value) { + output.write((value >>> 8) & 0xff); + output.write(value & 0xff); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java new file mode 100644 index 0000000..5a843fe --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java @@ -0,0 +1,1049 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.PrintWriter; +import java.io.IOException; +import java.util.Map; +import com.wenshuo.agent.javassist.CannotCompileException; + +/** + * stack_map attribute. + * + *

This is an entry in the attributes table of a Code attribute. + * It was introduced by J2SE 6 for the verification by + * typechecking. + * + * @see StackMap + * @since 3.4 + */ +public class StackMapTable extends AttributeInfo { + /** + * The name of this attribute "StackMapTable". + */ + public static final String tag = "StackMapTable"; + + /** + * Constructs a stack_map attribute. + */ + StackMapTable(ConstPool cp, byte[] newInfo) { + super(cp, tag, newInfo); + } + + StackMapTable(ConstPool cp, int name_id, DataInputStream in) + throws IOException + { + super(cp, name_id, in); + } + + /** + * Makes a copy. + * + * @exception RuntimeCopyException if a BadBytecode + * exception is thrown while copying, + * it is converted into + * RuntimeCopyException. + * + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) + throws RuntimeCopyException + { + try { + return new StackMapTable(newCp, + new Copier(this.constPool, info, newCp, classnames).doit()); + } + catch (BadBytecode e) { + throw new RuntimeCopyException("bad bytecode. fatal?"); + } + } + + /** + * An exception that may be thrown by copy() + * in StackMapTable. + */ + public static class RuntimeCopyException extends RuntimeException { + /** + * Constructs an exception. + */ + public RuntimeCopyException(String s) { + super(s); + } + } + + void write(DataOutputStream out) throws IOException { + super.write(out); + } + + /** + * Top_variable_info.tag. + */ + public static final int TOP = 0; + + /** + * Integer_variable_info.tag. + */ + public static final int INTEGER = 1; + + /** + * Float_variable_info.tag. + */ + public static final int FLOAT = 2; + + /** + * Double_variable_info.tag. + */ + public static final int DOUBLE = 3; + + /** + * Long_variable_info.tag. + */ + public static final int LONG = 4; + + /** + * Null_variable_info.tag. + */ + public static final int NULL = 5; + + /** + * UninitializedThis_variable_info.tag. + */ + public static final int THIS = 6; + + /** + * Object_variable_info.tag. + */ + public static final int OBJECT = 7; + + /** + * Uninitialized_variable_info.tag. + */ + public static final int UNINIT = 8; + + /** + * A code walker for a StackMapTable attribute. + */ + public static class Walker { + byte[] info; + int numOfEntries; + + /** + * Constructs a walker. + * + * @param smt the StackMapTable that this walker + * walks around. + */ + public Walker(StackMapTable smt) { + this(smt.get()); + } + + /** + * Constructs a walker. + * + * @param data the info field of the + * attribute_info structure. + * It can be obtained by get() + * in the AttributeInfo class. + */ + public Walker(byte[] data) { + info = data; + numOfEntries = ByteArray.readU16bit(data, 0); + } + + /** + * Returns the number of the entries. + */ + public final int size() { return numOfEntries; } + + /** + * Visits each entry of the stack map frames. + */ + public void parse() throws BadBytecode { + int n = numOfEntries; + int pos = 2; + for (int i = 0; i < n; i++) + pos = stackMapFrames(pos, i); + } + + /** + * Invoked when the next entry of the stack map frames is visited. + * + * @param pos the position of the frame in the info + * field of attribute_info structure. + * @param nth the frame is the N-th + * (0, 1st, 2nd, 3rd, 4th, ...) entry. + * @return the position of the next frame. + */ + int stackMapFrames(int pos, int nth) throws BadBytecode { + int type = info[pos] & 0xff; + if (type < 64) { + sameFrame(pos, type); + pos++; + } + else if (type < 128) + pos = sameLocals(pos, type); + else if (type < 247) + throw new BadBytecode("bad frame_type in StackMapTable"); + else if (type == 247) // SAME_LOCALS_1_STACK_ITEM_EXTENDED + pos = sameLocals(pos, type); + else if (type < 251) { + int offset = ByteArray.readU16bit(info, pos + 1); + chopFrame(pos, offset, 251 - type); + pos += 3; + } + else if (type == 251) { // SAME_FRAME_EXTENDED + int offset = ByteArray.readU16bit(info, pos + 1); + sameFrame(pos, offset); + pos += 3; + } + else if (type < 255) + pos = appendFrame(pos, type); + else // FULL_FRAME + pos = fullFrame(pos); + + return pos; + } + + /** + * Invoked if the visited frame is a same_frame or + * a same_frame_extended. + * + * @param pos the position of this frame in the info + * field of attribute_info structure. + * @param offsetDelta + */ + public void sameFrame(int pos, int offsetDelta) throws BadBytecode {} + + private int sameLocals(int pos, int type) throws BadBytecode { + int top = pos; + int offset; + if (type < 128) + offset = type - 64; + else { // type == 247 + offset = ByteArray.readU16bit(info, pos + 1); + pos += 2; + } + + int tag = info[pos + 1] & 0xff; + int data = 0; + if (tag == OBJECT || tag == UNINIT) { + data = ByteArray.readU16bit(info, pos + 2); + objectOrUninitialized(tag, data, pos + 2); + pos += 2; + } + + sameLocals(top, offset, tag, data); + return pos + 2; + } + + /** + * Invoked if the visited frame is a same_locals_1_stack_item_frame + * or a same_locals_1_stack_item_frame_extended. + * + * @param pos the position. + * @param offsetDelta + * @param stackTag stack[0].tag. + * @param stackData stack[0].cpool_index + * if the tag is OBJECT, + * or stack[0].offset + * if the tag is UNINIT. + */ + public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) + throws BadBytecode {} + + /** + * Invoked if the visited frame is a chop_frame. + * + * @param pos the position. + * @param offsetDelta + * @param k the k last locals are absent. + */ + public void chopFrame(int pos, int offsetDelta, int k) throws BadBytecode {} + + private int appendFrame(int pos, int type) throws BadBytecode { + int k = type - 251; + int offset = ByteArray.readU16bit(info, pos + 1); + int[] tags = new int[k]; + int[] data = new int[k]; + int p = pos + 3; + for (int i = 0; i < k; i++) { + int tag = info[p] & 0xff; + tags[i] = tag; + if (tag == OBJECT || tag == UNINIT) { + data[i] = ByteArray.readU16bit(info, p + 1); + objectOrUninitialized(tag, data[i], p + 1); + p += 3; + } + else { + data[i] = 0; + p++; + } + } + + appendFrame(pos, offset, tags, data); + return p; + } + + /** + * Invoked if the visited frame is a append_frame. + * + * @param pos the position. + * @param offsetDelta + * @param tags locals[i].tag. + * @param data locals[i].cpool_index + * or locals[i].offset. + */ + public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) + throws BadBytecode {} + + private int fullFrame(int pos) throws BadBytecode { + int offset = ByteArray.readU16bit(info, pos + 1); + int numOfLocals = ByteArray.readU16bit(info, pos + 3); + int[] localsTags = new int[numOfLocals]; + int[] localsData = new int[numOfLocals]; + int p = verifyTypeInfo(pos + 5, numOfLocals, localsTags, localsData); + int numOfItems = ByteArray.readU16bit(info, p); + int[] itemsTags = new int[numOfItems]; + int[] itemsData = new int[numOfItems]; + p = verifyTypeInfo(p + 2, numOfItems, itemsTags, itemsData); + fullFrame(pos, offset, localsTags, localsData, itemsTags, itemsData); + return p; + } + + /** + * Invoked if the visited frame is full_frame. + * + * @param pos the position. + * @param offsetDelta + * @param localTags locals[i].tag + * @param localData locals[i].cpool_index + * or locals[i].offset + * @param stackTags stack[i].tag + * @param stackData stack[i].cpool_index + * or stack[i].offset + */ + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) + throws BadBytecode {} + + private int verifyTypeInfo(int pos, int n, int[] tags, int[] data) { + for (int i = 0; i < n; i++) { + int tag = info[pos++] & 0xff; + tags[i] = tag; + if (tag == OBJECT || tag == UNINIT) { + data[i] = ByteArray.readU16bit(info, pos); + objectOrUninitialized(tag, data[i], pos); + pos += 2; + } + } + + return pos; + } + + /** + * Invoked if Object_variable_info + * or Uninitialized_variable_info is visited. + * + * @param tag OBJECT or UNINIT. + * @param data the value of cpool_index or offset. + * @param pos the position of cpool_index or offset. + */ + public void objectOrUninitialized(int tag, int data, int pos) {} + } + + static class SimpleCopy extends Walker { + private Writer writer; + + public SimpleCopy(byte[] data) { + super(data); + writer = new Writer(data.length); + } + + public byte[] doit() throws BadBytecode { + parse(); + return writer.toByteArray(); + } + + public void sameFrame(int pos, int offsetDelta) { + writer.sameFrame(offsetDelta); + } + + public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { + writer.sameLocals(offsetDelta, stackTag, copyData(stackTag, stackData)); + } + + public void chopFrame(int pos, int offsetDelta, int k) { + writer.chopFrame(offsetDelta, k); + } + + public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { + writer.appendFrame(offsetDelta, tags, copyData(tags, data)); + } + + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + writer.fullFrame(offsetDelta, localTags, copyData(localTags, localData), + stackTags, copyData(stackTags, stackData)); + } + + protected int copyData(int tag, int data) { + return data; + } + + protected int[] copyData(int[] tags, int[] data) { + return data; + } + } + + static class Copier extends SimpleCopy { + private ConstPool srcPool, destPool; + private Map classnames; + + public Copier(ConstPool src, byte[] data, ConstPool dest, Map names) { + super(data); + srcPool = src; + destPool = dest; + classnames = names; + } + + protected int copyData(int tag, int data) { + if (tag == OBJECT) + return srcPool.copy(data, destPool, classnames); + else + return data; + } + + protected int[] copyData(int[] tags, int[] data) { + int[] newData = new int[data.length]; + for (int i = 0; i < data.length; i++) + if (tags[i] == OBJECT) + newData[i] = srcPool.copy(data[i], destPool, classnames); + else + newData[i] = data[i]; + + return newData; + } + } + + /** + * Updates this stack map table when a new local variable is inserted + * for a new parameter. + * + * @param index the index of the added local variable. + * @param tag the type tag of that local variable. + * @param classInfo the index of the CONSTANT_Class_info structure + * in a constant pool table. This should be zero unless the tag + * is ITEM_Object. + * + * @see javassist.CtBehavior#addParameter(javassist.CtClass) + * @see #typeTagOf(char) + * @see ConstPool + */ + public void insertLocal(int index, int tag, int classInfo) + throws BadBytecode + { + byte[] data = new InsertLocal(this.get(), index, tag, classInfo).doit(); + this.set(data); + } + + /** + * Returns the tag of the type specified by the + * descriptor. This method returns INTEGER + * unless the descriptor is either D (double), F (float), + * J (long), L (class type), or [ (array). + * + * @param descriptor the type descriptor. + * @see Descriptor + */ + public static int typeTagOf(char descriptor) { + switch (descriptor) { + case 'D' : + return DOUBLE; + case 'F' : + return FLOAT; + case 'J' : + return LONG; + case 'L' : + case '[' : + return OBJECT; + // case 'V' : + default : + return INTEGER; + } + } + + /* This implementation assumes that a local variable initially + * holding a parameter value is never changed to be a different + * type. + * + */ + static class InsertLocal extends SimpleCopy { + private int varIndex; + private int varTag, varData; + + public InsertLocal(byte[] data, int varIndex, int varTag, int varData) { + super(data); + this.varIndex = varIndex; + this.varTag = varTag; + this.varData = varData; + } + + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + int len = localTags.length; + if (len < varIndex) { + super.fullFrame(pos, offsetDelta, localTags, localData, stackTags, stackData); + return; + } + + int typeSize = (varTag == LONG || varTag == DOUBLE) ? 2 : 1; + int[] localTags2 = new int[len + typeSize]; + int[] localData2 = new int[len + typeSize]; + int index = varIndex; + int j = 0; + for (int i = 0; i < len; i++) { + if (j == index) + j += typeSize; + + localTags2[j] = localTags[i]; + localData2[j++] = localData[i]; + } + + localTags2[index] = varTag; + localData2[index] = varData; + if (typeSize > 1) { + localTags2[index + 1] = TOP; + localData2[index + 1] = 0; + } + + super.fullFrame(pos, offsetDelta, localTags2, localData2, stackTags, stackData); + } + } + + /** + * A writer of stack map tables. + */ + public static class Writer { + ByteArrayOutputStream output; + int numOfEntries; + + /** + * Constructs a writer. + * @param size the initial buffer size. + */ + public Writer(int size) { + output = new ByteArrayOutputStream(size); + numOfEntries = 0; + output.write(0); // u2 number_of_entries + output.write(0); + } + + /** + * Returns the stack map table written out. + */ + public byte[] toByteArray() { + byte[] b = output.toByteArray(); + ByteArray.write16bit(numOfEntries, b, 0); + return b; + } + + /** + * Constructs and a return a stack map table containing + * the written stack map entries. + * + * @param cp the constant pool used to write + * the stack map entries. + */ + public StackMapTable toStackMapTable(ConstPool cp) { + return new StackMapTable(cp, toByteArray()); + } + + /** + * Writes a same_frame or a same_frame_extended. + */ + public void sameFrame(int offsetDelta) { + numOfEntries++; + if (offsetDelta < 64) + output.write(offsetDelta); + else { + output.write(251); // SAME_FRAME_EXTENDED + write16(offsetDelta); + } + } + + /** + * Writes a same_locals_1_stack_item + * or a same_locals_1_stack_item_extended. + * + * @param tag stack[0].tag. + * @param data stack[0].cpool_index + * if the tag is OBJECT, + * or stack[0].offset + * if the tag is UNINIT. + * Otherwise, this parameter is not used. + */ + public void sameLocals(int offsetDelta, int tag, int data) { + numOfEntries++; + if (offsetDelta < 64) + output.write(offsetDelta + 64); + else { + output.write(247); // SAME_LOCALS_1_STACK_ITEM_EXTENDED + write16(offsetDelta); + } + + writeTypeInfo(tag, data); + } + + /** + * Writes a chop_frame. + * + * @param k the number of absent locals. 1, 2, or 3. + */ + public void chopFrame(int offsetDelta, int k) { + numOfEntries++; + output.write(251 - k); + write16(offsetDelta); + } + + /** + * Writes a append_frame. The number of the appended + * locals is specified by the length of tags. + * + * @param tags locals[].tag. + * The length of this array must be + * either 1, 2, or 3. + * @param data locals[].cpool_index + * if the tag is OBJECT, + * or locals[].offset + * if the tag is UNINIT. + * Otherwise, this parameter is not used. + */ + public void appendFrame(int offsetDelta, int[] tags, int[] data) { + numOfEntries++; + int k = tags.length; // k is 1, 2, or 3 + output.write(k + 251); + write16(offsetDelta); + for (int i = 0; i < k; i++) + writeTypeInfo(tags[i], data[i]); + } + + /** + * Writes a full_frame. + * number_of_locals and number_of_stack_items + * are specified by the the length of localTags and + * stackTags. + * + * @param localTags locals[].tag. + * @param localData locals[].cpool_index + * if the tag is OBJECT, + * or locals[].offset + * if the tag is UNINIT. + * Otherwise, this parameter is not used. + * @param stackTags stack[].tag. + * @param stackData stack[].cpool_index + * if the tag is OBJECT, + * or stack[].offset + * if the tag is UNINIT. + * Otherwise, this parameter is not used. + */ + public void fullFrame(int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + numOfEntries++; + output.write(255); // FULL_FRAME + write16(offsetDelta); + int n = localTags.length; + write16(n); + for (int i = 0; i < n; i++) + writeTypeInfo(localTags[i], localData[i]); + + n = stackTags.length; + write16(n); + for (int i = 0; i < n; i++) + writeTypeInfo(stackTags[i], stackData[i]); + } + + private void writeTypeInfo(int tag, int data) { + output.write(tag); + if (tag == OBJECT || tag == UNINIT) + write16(data); + } + + private void write16(int value) { + output.write((value >>> 8) & 0xff); + output.write(value & 0xff); + } + } + + /** + * Prints the stack table map. + */ + public void println(PrintWriter w) { + Printer.print(this, w); + } + + /** + * Prints the stack table map. + * + * @param ps a print stream such as System.out. + */ + public void println(java.io.PrintStream ps) { + Printer.print(this, new java.io.PrintWriter(ps, true)); + } + + static class Printer extends Walker { + private PrintWriter writer; + private int offset; + + /** + * Prints the stack table map. + */ + public static void print(StackMapTable smt, PrintWriter writer) { + try { + new Printer(smt.get(), writer).parse(); + } + catch (BadBytecode e) { + writer.println(e.getMessage()); + } + } + + Printer(byte[] data, PrintWriter pw) { + super(data); + writer = pw; + offset = -1; + } + + public void sameFrame(int pos, int offsetDelta) { + offset += offsetDelta + 1; + writer.println(offset + " same frame: " + offsetDelta); + } + + public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { + offset += offsetDelta + 1; + writer.println(offset + " same locals: " + offsetDelta); + printTypeInfo(stackTag, stackData); + } + + public void chopFrame(int pos, int offsetDelta, int k) { + offset += offsetDelta + 1; + writer.println(offset + " chop frame: " + offsetDelta + ", " + k + " last locals"); + } + + public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { + offset += offsetDelta + 1; + writer.println(offset + " append frame: " + offsetDelta); + for (int i = 0; i < tags.length; i++) + printTypeInfo(tags[i], data[i]); + } + + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + offset += offsetDelta + 1; + writer.println(offset + " full frame: " + offsetDelta); + writer.println("[locals]"); + for (int i = 0; i < localTags.length; i++) + printTypeInfo(localTags[i], localData[i]); + + writer.println("[stack]"); + for (int i = 0; i < stackTags.length; i++) + printTypeInfo(stackTags[i], stackData[i]); + } + + private void printTypeInfo(int tag, int data) { + String msg = null; + switch (tag) { + case TOP : + msg = "top"; + break; + case INTEGER : + msg = "integer"; + break; + case FLOAT : + msg = "float"; + break; + case DOUBLE : + msg = "double"; + break; + case LONG : + msg = "long"; + break; + case NULL : + msg = "null"; + break; + case THIS : + msg = "this"; + break; + case OBJECT : + msg = "object (cpool_index " + data + ")"; + break; + case UNINIT : + msg = "uninitialized (offset " + data + ")"; + break; + } + + writer.print(" "); + writer.println(msg); + } + } + + void shiftPc(int where, int gapSize, boolean exclusive) + throws BadBytecode + { + new OffsetShifter(this, where, gapSize).parse(); + new Shifter(this, where, gapSize, exclusive).doit(); + } + + static class OffsetShifter extends Walker { + int where, gap; + + public OffsetShifter(StackMapTable smt, int where, int gap) { + super(smt); + this.where = where; + this.gap = gap; + } + + public void objectOrUninitialized(int tag, int data, int pos) { + if (tag == UNINIT) + if (where <= data) + ByteArray.write16bit(data + gap, info, pos); + } + } + + static class Shifter extends Walker { + private StackMapTable stackMap; + int where, gap; + int position; + byte[] updatedInfo; + boolean exclusive; + + public Shifter(StackMapTable smt, int where, int gap, boolean exclusive) { + super(smt); + stackMap = smt; + this.where = where; + this.gap = gap; + this.position = 0; + this.updatedInfo = null; + this.exclusive = exclusive; + } + + public void doit() throws BadBytecode { + parse(); + if (updatedInfo != null) + stackMap.set(updatedInfo); + } + + public void sameFrame(int pos, int offsetDelta) { + update(pos, offsetDelta, 0, 251); + } + + public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { + update(pos, offsetDelta, 64, 247); + } + + void update(int pos, int offsetDelta, int base, int entry) { + int oldPos = position; + position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); + boolean match; + if (exclusive) + match = oldPos < where && where <= position; + else + match = oldPos <= where && where < position; + + if (match) { + int newDelta = offsetDelta + gap; + position += gap; + if (newDelta < 64) + info[pos] = (byte)(newDelta + base); + else if (offsetDelta < 64) { + byte[] newinfo = insertGap(info, pos, 2); + newinfo[pos] = (byte)entry; + ByteArray.write16bit(newDelta, newinfo, pos + 1); + updatedInfo = newinfo; + } + else + ByteArray.write16bit(newDelta, info, pos + 1); + } + } + + static byte[] insertGap(byte[] info, int where, int gap) { + int len = info.length; + byte[] newinfo = new byte[len + gap]; + for (int i = 0; i < len; i++) + newinfo[i + (i < where ? 0 : gap)] = info[i]; + + return newinfo; + } + + public void chopFrame(int pos, int offsetDelta, int k) { + update(pos, offsetDelta); + } + + public void appendFrame(int pos, int offsetDelta, int[] tags, int[] data) { + update(pos, offsetDelta); + } + + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + update(pos, offsetDelta); + } + + void update(int pos, int offsetDelta) { + int oldPos = position; + position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); + boolean match; + if (exclusive) + match = oldPos < where && where <= position; + else + match = oldPos <= where && where < position; + + if (match) { + int newDelta = offsetDelta + gap; + ByteArray.write16bit(newDelta, info, pos + 1); + position += gap; + } + } + } + + /** + * @see CodeIterator.Switcher#adjustOffsets(int, int) + */ + void shiftForSwitch(int where, int gapSize) throws BadBytecode { + new SwitchShifter(this, where, gapSize).doit(); + } + + static class SwitchShifter extends Shifter { + SwitchShifter(StackMapTable smt, int where, int gap) { + super(smt, where, gap, false); + } + + void update(int pos, int offsetDelta, int base, int entry) { + int oldPos = position; + position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); + int newDelta = offsetDelta; + if (where == position) + newDelta = offsetDelta - gap; + else if (where == oldPos) + newDelta = offsetDelta + gap; + else + return; + + if (offsetDelta < 64) + if (newDelta < 64) + info[pos] = (byte)(newDelta + base); + else { + byte[] newinfo = insertGap(info, pos, 2); + newinfo[pos] = (byte)entry; + ByteArray.write16bit(newDelta, newinfo, pos + 1); + updatedInfo = newinfo; + } + else + if (newDelta < 64) { + byte[] newinfo = deleteGap(info, pos, 2); + newinfo[pos] = (byte)(newDelta + base); + updatedInfo = newinfo; + } + else + ByteArray.write16bit(newDelta, info, pos + 1); + } + + static byte[] deleteGap(byte[] info, int where, int gap) { + where += gap; + int len = info.length; + byte[] newinfo = new byte[len - gap]; + for (int i = 0; i < len; i++) + newinfo[i - (i < where ? 0 : gap)] = info[i]; + + return newinfo; + } + + void update(int pos, int offsetDelta) { + int oldPos = position; + position = oldPos + offsetDelta + (oldPos == 0 ? 0 : 1); + int newDelta = offsetDelta; + if (where == position) + newDelta = offsetDelta - gap; + else if (where == oldPos) + newDelta = offsetDelta + gap; + else + return; + + ByteArray.write16bit(newDelta, info, pos + 1); + } + } + + /** + * Undocumented method. Do not use; internal-use only. + * + *

This method is for javassist.convert.TransformNew. + * It is called to update the stack map table when + * the NEW opcode (and the following DUP) is removed. + * + * @param where the position of the removed NEW opcode. + */ + public void removeNew(int where) throws CannotCompileException { + try { + byte[] data = new NewRemover(this.get(), where).doit(); + this.set(data); + } + catch (BadBytecode e) { + throw new CannotCompileException("bad stack map table", e); + } + } + + static class NewRemover extends SimpleCopy { + int posOfNew; + + public NewRemover(byte[] data, int pos) { + super(data); + posOfNew = pos; + } + + public void sameLocals(int pos, int offsetDelta, int stackTag, int stackData) { + if (stackTag == UNINIT && stackData == posOfNew) + super.sameFrame(pos, offsetDelta); + else + super.sameLocals(pos, offsetDelta, stackTag, stackData); + } + + public void fullFrame(int pos, int offsetDelta, int[] localTags, int[] localData, + int[] stackTags, int[] stackData) { + int n = stackTags.length - 1; + for (int i = 0; i < n; i++) + if (stackTags[i] == UNINIT && stackData[i] == posOfNew + && stackTags[i + 1] == UNINIT && stackData[i + 1] == posOfNew) { + n++; + int[] stackTags2 = new int[n - 2]; + int[] stackData2 = new int[n - 2]; + int k = 0; + for (int j = 0; j < n; j++) + if (j == i) + j++; + else { + stackTags2[k] = stackTags[j]; + stackData2[k++] = stackData[j]; + } + + stackTags = stackTags2; + stackData = stackData2; + break; + } + + super.fullFrame(pos, offsetDelta, localTags, localData, stackTags, stackData); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java new file mode 100644 index 0000000..52484b7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java @@ -0,0 +1,56 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.Map; + +/** + * Synthetic_attribute. + */ +public class SyntheticAttribute extends AttributeInfo { + /** + * The name of this attribute "Synthetic". + */ + public static final String tag = "Synthetic"; + + SyntheticAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Constructs a Synthetic attribute. + * + * @param cp a constant pool table. + */ + public SyntheticAttribute(ConstPool cp) { + super(cp, tag, new byte[0]); + } + + /** + * Makes a copy. + * + * @param newCp the constant pool table used by the new copy. + * @param classnames should be null. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + return new SyntheticAttribute(newCp); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java new file mode 100644 index 0000000..29f075f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java @@ -0,0 +1,360 @@ +package com.wenshuo.agent.javassist.bytecode; + +import java.io.DataInputStream; +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import com.wenshuo.agent.javassist.bytecode.annotation.TypeAnnotationsWriter; + +/** + * A class representing + * {@code RuntimeVisibleTypeAnnotations} attribute and + * {@code RuntimeInvisibleTypeAnnotations} attribute. + * + * @since 3.19 + */ +public class TypeAnnotationsAttribute extends AttributeInfo { + /** + * The name of the {@code RuntimeVisibleTypeAnnotations} attribute. + */ + public static final String visibleTag = "RuntimeVisibleTypeAnnotations"; + + /** + * The name of the {@code RuntimeInvisibleTypeAnnotations} attribute. + */ + public static final String invisibleTag = "RuntimeInvisibleTypeAnnotations"; + + /** + * Constructs a Runtime(In)VisibleTypeAnnotations_attribute. + * + * @param cp constant pool + * @param attrname attribute name (visibleTag or + * invisibleTag). + * @param info the contents of this attribute. It does not + * include attribute_name_index or + * attribute_length. + */ + public TypeAnnotationsAttribute(ConstPool cp, String attrname, byte[] info) { + super(cp, attrname, info); + } + + /** + * @param n the attribute name. + */ + TypeAnnotationsAttribute(ConstPool cp, int n, DataInputStream in) + throws IOException + { + super(cp, n, in); + } + + /** + * Returns num_annotations. + */ + public int numAnnotations() { + return ByteArray.readU16bit(info, 0); + } + + /** + * Copies this attribute and returns a new copy. + */ + public AttributeInfo copy(ConstPool newCp, Map classnames) { + Copier copier = new Copier(info, constPool, newCp, classnames); + try { + copier.annotationArray(); + return new TypeAnnotationsAttribute(newCp, getName(), copier.close()); + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * @param oldname a JVM class name. + * @param newname a JVM class name. + */ + void renameClass(String oldname, String newname) { + HashMap map = new HashMap(); + map.put(oldname, newname); + renameClass(map); + } + + void renameClass(Map classnames) { + Renamer renamer = new Renamer(info, getConstPool(), classnames); + try { + renamer.annotationArray(); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + void getRefClasses(Map classnames) { renameClass(classnames); } + + /** + * To visit each elements of the type annotation attribute, + * call {@code annotationArray()}. + * + * @see #annotationArray() + */ + static class TAWalker extends AnnotationsAttribute.Walker { + SubWalker subWalker; + + TAWalker(byte[] attrInfo) { + super(attrInfo); + subWalker = new SubWalker(attrInfo); + } + + int annotationArray(int pos, int num) throws Exception { + for (int i = 0; i < num; i++) { + int targetType = info[pos] & 0xff; + pos = subWalker.targetInfo(pos + 1, targetType); + pos = subWalker.typePath(pos); + pos = annotation(pos); + } + + return pos; + } + } + + static class SubWalker { + byte[] info; + + SubWalker(byte[] attrInfo) { + info = attrInfo; + } + + final int targetInfo(int pos, int type) throws Exception { + switch (type) { + case 0x00: + case 0x01: { + int index = info[pos] & 0xff; + typeParameterTarget(pos, type, index); + return pos + 1; } + case 0x10: { + int index = ByteArray.readU16bit(info, pos); + supertypeTarget(pos, index); + return pos + 2; } + case 0x11: + case 0x12: { + int param = info[pos] & 0xff; + int bound = info[pos + 1] & 0xff; + typeParameterBoundTarget(pos, type, param, bound); + return pos + 2; } + case 0x13: + case 0x14: + case 0x15: + emptyTarget(pos, type); + return pos; + case 0x16: { + int index = info[pos] & 0xff; + formalParameterTarget(pos, index); + return pos + 1; } + case 0x17: { + int index = ByteArray.readU16bit(info, pos); + throwsTarget(pos, index); + return pos + 2; } + case 0x40: + case 0x41: { + int len = ByteArray.readU16bit(info, pos); + return localvarTarget(pos + 2, type, len); } + case 0x42: { + int index = ByteArray.readU16bit(info, pos); + catchTarget(pos, index); + return pos + 2; } + case 0x43: + case 0x44: + case 0x45: + case 0x46: { + int offset = ByteArray.readU16bit(info, pos); + offsetTarget(pos, type, offset); + return pos + 2; } + case 0x47: + case 0x48: + case 0x49: + case 0x4a: + case 0x4b: { + int offset = ByteArray.readU16bit(info, pos); + int index = info[pos + 2] & 0xff; + typeArgumentTarget(pos, type, offset, index); + return pos + 3; } + default: + throw new RuntimeException("invalid target type: " + type); + } + } + + void typeParameterTarget(int pos, int targetType, int typeParameterIndex) + throws Exception {} + + void supertypeTarget(int pos, int superTypeIndex) throws Exception {} + + void typeParameterBoundTarget(int pos, int targetType, int typeParameterIndex, + int boundIndex) throws Exception {} + + void emptyTarget(int pos, int targetType) throws Exception {} + + void formalParameterTarget(int pos, int formalParameterIndex) throws Exception {} + + void throwsTarget(int pos, int throwsTypeIndex) throws Exception {} + + int localvarTarget(int pos, int targetType, int tableLength) throws Exception { + for (int i = 0; i < tableLength; i++) { + int start = ByteArray.readU16bit(info, pos); + int length = ByteArray.readU16bit(info, pos + 2); + int index = ByteArray.readU16bit(info, pos + 4); + localvarTarget(pos, targetType, start, length, index); + pos += 6; + } + + return pos; + } + + void localvarTarget(int pos, int targetType, int startPc, int length, int index) + throws Exception {} + + void catchTarget(int pos, int exceptionTableIndex) throws Exception {} + + void offsetTarget(int pos, int targetType, int offset) throws Exception {} + + void typeArgumentTarget(int pos, int targetType, int offset, int typeArgumentIndex) + throws Exception {} + + final int typePath(int pos) throws Exception { + int len = info[pos++] & 0xff; + return typePath(pos, len); + } + + int typePath(int pos, int pathLength) throws Exception { + for (int i = 0; i < pathLength; i++) { + int kind = info[pos] & 0xff; + int index = info[pos + 1] & 0xff; + typePath(pos, kind, index); + pos += 2; + } + + return pos; + } + + void typePath(int pos, int typePathKind, int typeArgumentIndex) throws Exception {} + } + + static class Renamer extends AnnotationsAttribute.Renamer { + SubWalker sub; + + Renamer(byte[] attrInfo, ConstPool cp, Map map) { + super(attrInfo, cp, map); + sub = new SubWalker(attrInfo); + } + + int annotationArray(int pos, int num) throws Exception { + for (int i = 0; i < num; i++) { + int targetType = info[pos] & 0xff; + pos = sub.targetInfo(pos + 1, targetType); + pos = sub.typePath(pos); + pos = annotation(pos); + } + + return pos; + } + } + + static class Copier extends AnnotationsAttribute.Copier { + SubCopier sub; + + Copier(byte[] attrInfo, ConstPool src, ConstPool dest, Map map) { + super(attrInfo, src, dest, map, false); + TypeAnnotationsWriter w = new TypeAnnotationsWriter(output, dest); + writer = w; + sub = new SubCopier(attrInfo, src, dest, map, w); + } + + int annotationArray(int pos, int num) throws Exception { + writer.numAnnotations(num); + for (int i = 0; i < num; i++) { + int targetType = info[pos] & 0xff; + pos = sub.targetInfo(pos + 1, targetType); + pos = sub.typePath(pos); + pos = annotation(pos); + } + + return pos; + } + } + + static class SubCopier extends SubWalker { + ConstPool srcPool, destPool; + Map classnames; + TypeAnnotationsWriter writer; + + SubCopier(byte[] attrInfo, ConstPool src, ConstPool dest, Map map, + TypeAnnotationsWriter w) + { + super(attrInfo); + srcPool = src; + destPool = dest; + classnames = map; + writer = w; + } + + void typeParameterTarget(int pos, int targetType, int typeParameterIndex) + throws Exception + { + writer.typeParameterTarget(targetType, typeParameterIndex); + } + + void supertypeTarget(int pos, int superTypeIndex) throws Exception { + writer.supertypeTarget(superTypeIndex); + } + + void typeParameterBoundTarget(int pos, int targetType, int typeParameterIndex, + int boundIndex) + throws Exception + { + writer.typeParameterBoundTarget(targetType, typeParameterIndex, boundIndex); + } + + void emptyTarget(int pos, int targetType) throws Exception { + writer.emptyTarget(targetType); + } + + void formalParameterTarget(int pos, int formalParameterIndex) throws Exception { + writer.formalParameterTarget(formalParameterIndex); + } + + void throwsTarget(int pos, int throwsTypeIndex) throws Exception { + writer.throwsTarget(throwsTypeIndex); + } + + int localvarTarget(int pos, int targetType, int tableLength) throws Exception { + writer.localVarTarget(targetType, tableLength); + return super.localvarTarget(pos, targetType, tableLength); + } + + void localvarTarget(int pos, int targetType, int startPc, int length, int index) + throws Exception + { + writer.localVarTargetTable(startPc, length, index); + } + + void catchTarget(int pos, int exceptionTableIndex) throws Exception { + writer.catchTarget(exceptionTableIndex); + } + + void offsetTarget(int pos, int targetType, int offset) throws Exception { + writer.offsetTarget(targetType, offset); + } + + void typeArgumentTarget(int pos, int targetType, int offset, int typeArgumentIndex) + throws Exception + { + writer.typeArgumentTarget(targetType, offset, typeArgumentIndex); + } + + int typePath(int pos, int pathLength) throws Exception { + writer.typePath(pathLength); + return super.typePath(pos, pathLength); + } + + void typePath(int pos, int typePathKind, int typeArgumentIndex) throws Exception { + writer.typePathPath(typePathKind, typeArgumentIndex); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java new file mode 100644 index 0000000..e70d005 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java @@ -0,0 +1,423 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.Iterator; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.AccessFlag; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.ExceptionTable; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.Opcode; + +/** + * A data-flow analyzer that determines the type state of the stack and local + * variable table at every reachable instruction in a method. During analysis, + * bytecode verification is performed in a similar manner to that described + * in the JVM specification. + * + *

Example:

+ * + * 
+ * // Method to analyze
+ * public Object doSomething(int x) {
+ *     Number n;
+ *     if (x < 5) {
+ *        n = new Double(0);
+ *     } else {
+ *        n = new Long(0);
+ *     }
+ *
+ *     return n;
+ * }
+ *
+ * // Which compiles to:
+ * // 0:   iload_1
+ * // 1:   iconst_5
+ * // 2:   if_icmpge   17
+ * // 5:   new #18; //class java/lang/Double
+ * // 8:   dup
+ * // 9:   dconst_0
+ * // 10:  invokespecial   #44; //Method java/lang/Double."<init>":(D)V
+ * // 13:  astore_2
+ * // 14:  goto    26
+ * // 17:  new #16; //class java/lang/Long
+ * // 20:  dup
+ * // 21:  lconst_1
+ * // 22:  invokespecial   #47; //Method java/lang/Long."<init>":(J)V
+ * // 25:  astore_2
+ * // 26:  aload_2
+ * // 27:  areturn
+ *
+ * public void analyzeIt(CtClass clazz, MethodInfo method) {
+ *     Analyzer analyzer = new Analyzer();
+ *     Frame[] frames = analyzer.analyze(clazz, method);
+ *     frames[0].getLocal(0).getCtClass(); // returns clazz;
+ *     frames[0].getLocal(1).getCtClass(); // returns java.lang.String
+ *     frames[1].peek(); // returns Type.INTEGER
+ *     frames[27].peek().getCtClass(); // returns java.lang.Number
+ * }
+ *
+ * + * @see FramePrinter + * @author Jason T. Greene + */ +public class Analyzer implements Opcode { + private final SubroutineScanner scanner = new SubroutineScanner(); + private CtClass clazz; + private ExceptionInfo[] exceptions; + private Frame[] frames; + private Subroutine[] subroutines; + + private static class ExceptionInfo { + private int end; + private int handler; + private int start; + private Type type; + + private ExceptionInfo(int start, int end, int handler, Type type) { + this.start = start; + this.end = end; + this.handler = handler; + this.type = type; + } + } + + /** + * Performs data-flow analysis on a method and returns an array, indexed by + * instruction position, containing the starting frame state of all reachable + * instructions. Non-reachable code, and illegal code offsets are represented + * as a null in the frame state array. This can be used to detect dead code. + * + * If the method does not contain code (it is either native or abstract), null + * is returned. + * + * @param clazz the declaring class of the method + * @param method the method to analyze + * @return an array, indexed by instruction position, of the starting frame state, + * or null if this method doesn't have code + * @throws BadBytecode if the bytecode does not comply with the JVM specification + */ + public Frame[] analyze(CtClass clazz, MethodInfo method) throws BadBytecode { + this.clazz = clazz; + CodeAttribute codeAttribute = method.getCodeAttribute(); + // Native or Abstract + if (codeAttribute == null) + return null; + + int maxLocals = codeAttribute.getMaxLocals(); + int maxStack = codeAttribute.getMaxStack(); + int codeLength = codeAttribute.getCodeLength(); + + CodeIterator iter = codeAttribute.iterator(); + IntQueue queue = new IntQueue(); + + exceptions = buildExceptionInfo(method); + subroutines = scanner.scan(method); + + Executor executor = new Executor(clazz.getClassPool(), method.getConstPool()); + frames = new Frame[codeLength]; + frames[iter.lookAhead()] = firstFrame(method, maxLocals, maxStack); + queue.add(iter.next()); + while (!queue.isEmpty()) { + analyzeNextEntry(method, iter, queue, executor); + } + + return frames; + } + + /** + * Performs data-flow analysis on a method and returns an array, indexed by + * instruction position, containing the starting frame state of all reachable + * instructions. Non-reachable code, and illegal code offsets are represented + * as a null in the frame state array. This can be used to detect dead code. + * + * If the method does not contain code (it is either native or abstract), null + * is returned. + * + * @param method the method to analyze + * @return an array, indexed by instruction position, of the starting frame state, + * or null if this method doesn't have code + * @throws BadBytecode if the bytecode does not comply with the JVM specification + */ + public Frame[] analyze(CtMethod method) throws BadBytecode { + return analyze(method.getDeclaringClass(), method.getMethodInfo2()); + } + + private void analyzeNextEntry(MethodInfo method, CodeIterator iter, + IntQueue queue, Executor executor) throws BadBytecode { + int pos = queue.take(); + iter.move(pos); + iter.next(); + + Frame frame = frames[pos].copy(); + Subroutine subroutine = subroutines[pos]; + + try { + executor.execute(method, pos, iter, frame, subroutine); + } catch (RuntimeException e) { + throw new BadBytecode(e.getMessage() + "[pos = " + pos + "]", e); + } + + int opcode = iter.byteAt(pos); + + if (opcode == TABLESWITCH) { + mergeTableSwitch(queue, pos, iter, frame); + } else if (opcode == LOOKUPSWITCH) { + mergeLookupSwitch(queue, pos, iter, frame); + } else if (opcode == RET) { + mergeRet(queue, iter, pos, frame, subroutine); + } else if (Util.isJumpInstruction(opcode)) { + int target = Util.getJumpTarget(pos, iter); + + if (Util.isJsr(opcode)) { + // Merge the state before the jsr into the next instruction + mergeJsr(queue, frames[pos], subroutines[target], pos, lookAhead(iter, pos)); + } else if (! Util.isGoto(opcode)) { + merge(queue, frame, lookAhead(iter, pos)); + } + + merge(queue, frame, target); + } else if (opcode != ATHROW && ! Util.isReturn(opcode)) { + // Can advance to next instruction + merge(queue, frame, lookAhead(iter, pos)); + } + + // Merge all exceptions that are reachable from this instruction. + // The redundancy is intentional, since the state must be based + // on the current instruction frame. + mergeExceptionHandlers(queue, method, pos, frame); + } + + private ExceptionInfo[] buildExceptionInfo(MethodInfo method) { + ConstPool constPool = method.getConstPool(); + ClassPool classes = clazz.getClassPool(); + + ExceptionTable table = method.getCodeAttribute().getExceptionTable(); + ExceptionInfo[] exceptions = new ExceptionInfo[table.size()]; + for (int i = 0; i < table.size(); i++) { + int index = table.catchType(i); + Type type; + try { + type = index == 0 ? Type.THROWABLE : Type.get(classes.get(constPool.getClassInfo(index))); + } catch (NotFoundException e) { + throw new IllegalStateException(e.getMessage()); + } + + exceptions[i] = new ExceptionInfo(table.startPc(i), table.endPc(i), table.handlerPc(i), type); + } + + return exceptions; + } + + private Frame firstFrame(MethodInfo method, int maxLocals, int maxStack) { + int pos = 0; + + Frame first = new Frame(maxLocals, maxStack); + if ((method.getAccessFlags() & AccessFlag.STATIC) == 0) { + first.setLocal(pos++, Type.get(clazz)); + } + + CtClass[] parameters; + try { + parameters = Descriptor.getParameterTypes(method.getDescriptor(), clazz.getClassPool()); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + + for (int i = 0; i < parameters.length; i++) { + Type type = zeroExtend(Type.get(parameters[i])); + first.setLocal(pos++, type); + if (type.getSize() == 2) + first.setLocal(pos++, Type.TOP); + } + + return first; + } + + private int getNext(CodeIterator iter, int of, int restore) throws BadBytecode { + iter.move(of); + iter.next(); + int next = iter.lookAhead(); + iter.move(restore); + iter.next(); + + return next; + } + + private int lookAhead(CodeIterator iter, int pos) throws BadBytecode { + if (! iter.hasNext()) + throw new BadBytecode("Execution falls off end! [pos = " + pos + "]"); + + return iter.lookAhead(); + } + + + private void merge(IntQueue queue, Frame frame, int target) { + Frame old = frames[target]; + boolean changed; + + if (old == null) { + frames[target] = frame.copy(); + changed = true; + } else { + changed = old.merge(frame); + } + + if (changed) { + queue.add(target); + } + } + + private void mergeExceptionHandlers(IntQueue queue, MethodInfo method, int pos, Frame frame) { + for (int i = 0; i < exceptions.length; i++) { + ExceptionInfo exception = exceptions[i]; + + // Start is inclusive, while end is exclusive! + if (pos >= exception.start && pos < exception.end) { + Frame newFrame = frame.copy(); + newFrame.clearStack(); + newFrame.push(exception.type); + merge(queue, newFrame, exception.handler); + } + } + } + + private void mergeJsr(IntQueue queue, Frame frame, Subroutine sub, int pos, int next) throws BadBytecode { + if (sub == null) + throw new BadBytecode("No subroutine at jsr target! [pos = " + pos + "]"); + + Frame old = frames[next]; + boolean changed = false; + + if (old == null) { + old = frames[next] = frame.copy(); + changed = true; + } else { + for (int i = 0; i < frame.localsLength(); i++) { + // Skip everything accessed by a subroutine, mergeRet must handle this + if (!sub.isAccessed(i)) { + Type oldType = old.getLocal(i); + Type newType = frame.getLocal(i); + if (oldType == null) { + old.setLocal(i, newType); + changed = true; + continue; + } + + newType = oldType.merge(newType); + // Always set the type, in case a multi-type switched to a standard type. + old.setLocal(i, newType); + if (!newType.equals(oldType) || newType.popChanged()) + changed = true; + } + } + } + + if (! old.isJsrMerged()) { + old.setJsrMerged(true); + changed = true; + } + + if (changed && old.isRetMerged()) + queue.add(next); + + } + + private void mergeLookupSwitch(IntQueue queue, int pos, CodeIterator iter, Frame frame) throws BadBytecode { + int index = (pos & ~3) + 4; + // default + merge(queue, frame, pos + iter.s32bitAt(index)); + int npairs = iter.s32bitAt(index += 4); + int end = npairs * 8 + (index += 4); + + // skip "match" + for (index += 4; index < end; index += 8) { + int target = iter.s32bitAt(index) + pos; + merge(queue, frame, target); + } + } + + private void mergeRet(IntQueue queue, CodeIterator iter, int pos, Frame frame, Subroutine subroutine) throws BadBytecode { + if (subroutine == null) + throw new BadBytecode("Ret on no subroutine! [pos = " + pos + "]"); + + Iterator callerIter = subroutine.callers().iterator(); + while (callerIter.hasNext()) { + int caller = ((Integer) callerIter.next()).intValue(); + int returnLoc = getNext(iter, caller, pos); + boolean changed = false; + + Frame old = frames[returnLoc]; + if (old == null) { + old = frames[returnLoc] = frame.copyStack(); + changed = true; + } else { + changed = old.mergeStack(frame); + } + + for (Iterator i = subroutine.accessed().iterator(); i.hasNext(); ) { + int index = ((Integer)i.next()).intValue(); + Type oldType = old.getLocal(index); + Type newType = frame.getLocal(index); + if (oldType != newType) { + old.setLocal(index, newType); + changed = true; + } + } + + if (! old.isRetMerged()) { + old.setRetMerged(true); + changed = true; + } + + if (changed && old.isJsrMerged()) + queue.add(returnLoc); + } + } + + + private void mergeTableSwitch(IntQueue queue, int pos, CodeIterator iter, Frame frame) throws BadBytecode { + // Skip 4 byte alignment padding + int index = (pos & ~3) + 4; + // default + merge(queue, frame, pos + iter.s32bitAt(index)); + int low = iter.s32bitAt(index += 4); + int high = iter.s32bitAt(index += 4); + int end = (high - low + 1) * 4 + (index += 4); + + // Offset table + for (; index < end; index += 4) { + int target = iter.s32bitAt(index) + pos; + merge(queue, frame, target); + } + } + + private Type zeroExtend(Type type) { + if (type == Type.SHORT || type == Type.BYTE || type == Type.CHAR || type == Type.BOOLEAN) + return Type.INTEGER; + + return type; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java new file mode 100644 index 0000000..d37d84c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java @@ -0,0 +1,504 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.ArrayList; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.stackmap.BasicBlock; + +/** + * Represents the control flow graph of a given method. + * + *

To obtain the control flow graph, do the following:

+ * + * 
CtMethod m = ...
+ * ControlFlow cf = new ControlFlow(m);
+ * Block[] blocks = cf.basicBlocks();
+ *
+ * + *

blocks is an array of basic blocks in + * that method body.

+ * + * @see javassist.CtMethod + * @see Block + * @see Frame + * @see Analyzer + * @author Shigeru Chiba + * @since 3.16 + */ +public class ControlFlow { + private CtClass clazz; + private MethodInfo methodInfo; + private Block[] basicBlocks; + private Frame[] frames; + + /** + * Constructs a control-flow analyzer for the given method. + */ + public ControlFlow(CtMethod method) throws BadBytecode { + this(method.getDeclaringClass(), method.getMethodInfo2()); + } + + /** + * Constructs a control-flow analyzer. + */ + public ControlFlow(CtClass ctclazz, MethodInfo minfo) throws BadBytecode { + clazz = ctclazz; + methodInfo = minfo; + frames = null; + basicBlocks = (Block[])new BasicBlock.Maker() { + protected BasicBlock makeBlock(int pos) { + return new Block(pos, methodInfo); + } + protected BasicBlock[] makeArray(int size) { + return new Block[size]; + } + }.make(minfo); + int size = basicBlocks.length; + int[] counters = new int[size]; + for (int i = 0; i < size; i++) { + Block b = basicBlocks[i]; + b.index = i; + b.entrances = new Block[b.incomings()]; + counters[i] = 0; + } + + for (int i = 0; i < size; i++) { + Block b = basicBlocks[i]; + for (int k = 0; k < b.exits(); k++) { + Block e = b.exit(k); + e.entrances[counters[e.index]++] = b; + } + + ControlFlow.Catcher[] catchers = b.catchers(); + for (int k = 0; k < catchers.length; k++) { + Block catchBlock = catchers[k].node; + catchBlock.entrances[counters[catchBlock.index]++] = b; + } + } + } + + /** + * Returns all the basic blocks in the method body. + */ + public Block[] basicBlocks() { + return basicBlocks; + } + + /** + * Returns the types of the local variables and stack frame entries + * available at the given position. If the byte at the position is + * not the first byte of an instruction, then this method returns + * null. + * + * @param pos the position. + */ + public Frame frameAt(int pos) throws BadBytecode { + if (frames == null) + frames = new Analyzer().analyze(clazz, methodInfo); + + return frames[pos]; + } + + /** + * Constructs a dominator tree. This method returns an array of + * the tree nodes. The first element of the array is the root + * of the tree. + * + *

The order of the elements is the same as that + * of the elements in the Block array returned + * by the basicBlocks + * method. If a Block object is at the i-th position + * in the Block array, then + * the Node object referring to that + * Block object is at the i-th position in the + * array returned by this method. + * For every array element node, its index in the + * array is equivalent to node.block().index(). + * + * @return an array of the tree nodes, or null if the method is abstract. + * @see Node#block() + * @see Block#index() + */ + public Node[] dominatorTree() { + int size = basicBlocks.length; + if (size == 0) + return null; + + Node[] nodes = new Node[size]; + boolean[] visited = new boolean[size]; + int[] distance = new int[size]; + for (int i = 0; i < size; i++) { + nodes[i] = new Node(basicBlocks[i]); + visited[i] = false; + } + + Access access = new Access(nodes) { + BasicBlock[] exits(Node n) { return n.block.getExit(); } + BasicBlock[] entrances(Node n) { return n.block.entrances; } + }; + nodes[0].makeDepth1stTree(null, visited, 0, distance, access); + do { + for (int i = 0; i < size; i++) + visited[i] = false; + } while (nodes[0].makeDominatorTree(visited, distance, access)); + Node.setChildren(nodes); + return nodes; + } + + /** + * Constructs a post dominator tree. This method returns an array of + * the tree nodes. Note that the tree has multiple roots. + * The parent of the root nodes is null. + * + *

The order of the elements is the same as that + * of the elements in the Block array returned + * by the basicBlocks + * method. If a Block object is at the i-th position + * in the Block array, then + * the Node object referring to that + * Block object is at the i-th position in the + * array returned by this method. + * For every array element node, its index in the + * array is equivalent to node.block().index(). + * + * @return an array of the tree nodes, or null if the method is abstract. + * @see Node#block() + * @see Block#index() + */ + public Node[] postDominatorTree() { + int size = basicBlocks.length; + if (size == 0) + return null; + + Node[] nodes = new Node[size]; + boolean[] visited = new boolean[size]; + int[] distance = new int[size]; + for (int i = 0; i < size; i++) { + nodes[i] = new Node(basicBlocks[i]); + visited[i] = false; + } + + Access access = new Access(nodes) { + BasicBlock[] exits(Node n) { return n.block.entrances; } + BasicBlock[] entrances(Node n) { return n.block.getExit(); } + }; + + int counter = 0; + for (int i = 0; i < size; i++) + if (nodes[i].block.exits() == 0) + counter = nodes[i].makeDepth1stTree(null, visited, counter, distance, access); + + boolean changed; + do { + for (int i = 0; i < size; i++) + visited[i] = false; + + changed = false; + for (int i = 0; i < size; i++) + if (nodes[i].block.exits() == 0) + if (nodes[i].makeDominatorTree(visited, distance, access)) + changed = true; + } while (changed); + + Node.setChildren(nodes); + return nodes; + } + + /** + * Basic block. + * It is a sequence of contiguous instructions that do not contain + * jump/branch instructions except the last one. + * Since Java6 or later does not allow JSR, + * we deal with JSR as a non-branch instruction. + */ + public static class Block extends BasicBlock { + /** + * A field that can be freely used for storing extra data. + * A client program of this control-flow analyzer can append + * an additional attribute to a Block object. + * The Javassist library never accesses this field. + */ + public Object clientData = null; + + int index; + MethodInfo method; + Block[] entrances; + + Block(int pos, MethodInfo minfo) { + super(pos); + method = minfo; + } + + protected void toString2(StringBuffer sbuf) { + super.toString2(sbuf); + sbuf.append(", incoming{"); + for (int i = 0; i < entrances.length; i++) + sbuf.append(entrances[i].position).append(", "); + + sbuf.append("}"); + } + + BasicBlock[] getExit() { return exit; } + + /** + * Returns the position of this block in the array of + * basic blocks that the basicBlocks method + * returns. + * + * @see #basicBlocks() + */ + public int index() { return index; } + + /** + * Returns the position of the first instruction + * in this block. + */ + public int position() { return position; } + + /** + * Returns the length of this block. + */ + public int length() { return length; } + + /** + * Returns the number of the control paths entering this block. + */ + public int incomings() { return incoming; } + + /** + * Returns the block that the control may jump into this block from. + */ + public Block incoming(int n) { + return entrances[n]; + } + + /** + * Return the number of the blocks that may be executed + * after this block. + */ + public int exits() { return exit == null ? 0 : exit.length; } + + /** + * Returns the n-th block that may be executed after this + * block. + * + * @param n an index in the array of exit blocks. + */ + public Block exit(int n) { return (Block)exit[n]; } + + /** + * Returns catch clauses that will catch an exception thrown + * in this block. + */ + public Catcher[] catchers() { + ArrayList catchers = new ArrayList(); + BasicBlock.Catch c = toCatch; + while (c != null) { + catchers.add(new Catcher(c)); + c = c.next; + } + + return (Catcher[])catchers.toArray(new Catcher[catchers.size()]); + } + } + + static abstract class Access { + Node[] all; + Access(Node[] nodes) { all = nodes; } + Node node(BasicBlock b) { return all[((Block)b).index]; } + abstract BasicBlock[] exits(Node n); + abstract BasicBlock[] entrances(Node n); + } + + /** + * A node of (post) dominator trees. + */ + public static class Node { + private Block block; + private Node parent; + private Node[] children; + + Node(Block b) { + block = b; + parent = null; + } + + /** + * Returns a String representation. + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(); + sbuf.append("Node[pos=").append(block().position()); + sbuf.append(", parent="); + sbuf.append(parent == null ? "*" : Integer.toString(parent.block().position())); + sbuf.append(", children{"); + for (int i = 0; i < children.length; i++) + sbuf.append(children[i].block().position()).append(", "); + + sbuf.append("}]"); + return sbuf.toString(); + } + + /** + * Returns the basic block indicated by this node. + */ + public Block block() { return block; } + + /** + * Returns the parent of this node. + */ + public Node parent() { return parent; } + + /** + * Returns the number of the children of this node. + */ + public int children() { return children.length; } + + /** + * Returns the n-th child of this node. + * + * @param n an index in the array of children. + */ + public Node child(int n) { return children[n]; } + + /* + * After executing this method, distance[] represents the post order of the tree nodes. + * It also represents distances from the root; a bigger number represents a shorter + * distance. parent is set to its parent in the depth first spanning tree. + */ + int makeDepth1stTree(Node caller, boolean[] visited, int counter, int[] distance, Access access) { + int index = block.index; + if (visited[index]) + return counter; + + visited[index] = true; + parent = caller; + BasicBlock[] exits = access.exits(this); + if (exits != null) + for (int i = 0; i < exits.length; i++) { + Node n = access.node(exits[i]); + counter = n.makeDepth1stTree(this, visited, counter, distance, access); + } + + distance[index] = counter++; + return counter; + } + + boolean makeDominatorTree(boolean[] visited, int[] distance, Access access) { + int index = block.index; + if (visited[index]) + return false; + + visited[index] = true; + boolean changed = false; + BasicBlock[] exits = access.exits(this); + if (exits != null) + for (int i = 0; i < exits.length; i++) { + Node n = access.node(exits[i]); + if (n.makeDominatorTree(visited, distance, access)) + changed = true; + } + + BasicBlock[] entrances = access.entrances(this); + if (entrances != null) + for (int i = 0; i < entrances.length; i++) { + if (parent != null) { + Node n = getAncestor(parent, access.node(entrances[i]), distance); + if (n != parent) { + parent = n; + changed = true; + } + } + } + + return changed; + } + + private static Node getAncestor(Node n1, Node n2, int[] distance) { + while (n1 != n2) { + if (distance[n1.block.index] < distance[n2.block.index]) + n1 = n1.parent; + else + n2 = n2.parent; + + if (n1 == null || n2 == null) + return null; + } + + return n1; + } + + private static void setChildren(Node[] all) { + int size = all.length; + int[] nchildren = new int[size]; + for (int i = 0; i < size; i++) + nchildren[i] = 0; + + for (int i = 0; i < size; i++) { + Node p = all[i].parent; + if (p != null) + nchildren[p.block.index]++; + } + + for (int i = 0; i < size; i++) + all[i].children = new Node[nchildren[i]]; + + for (int i = 0; i < size; i++) + nchildren[i] = 0; + + for (int i = 0; i < size; i++) { + Node n = all[i]; + Node p = n.parent; + if (p != null) + p.children[nchildren[p.block.index]++] = n; + } + } + } + + /** + * Represents a catch clause. + */ + public static class Catcher { + private Block node; + private int typeIndex; + + Catcher(BasicBlock.Catch c) { + node = (Block)c.body; + typeIndex = c.typeIndex; + } + + /** + * Returns the first block of the catch clause. + */ + public Block block() { return node; } + + /** + * Returns the name of the exception type that + * this catch clause catches. + */ + public String type() { + if (typeIndex == 0) + return "java.lang.Throwable"; + else + return node.method.getConstPool().getClassInfo(typeIndex); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java new file mode 100644 index 0000000..76e7e82 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java @@ -0,0 +1,1047 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.Opcode; + +/** + * Executor is responsible for modeling the effects of a JVM instruction on a frame. + * + * @author Jason T. Greene + */ +public class Executor implements Opcode { + private final ConstPool constPool; + private final ClassPool classPool; + private final Type STRING_TYPE; + private final Type CLASS_TYPE; + private final Type THROWABLE_TYPE; + private int lastPos; + + public Executor(ClassPool classPool, ConstPool constPool) { + this.constPool = constPool; + this.classPool = classPool; + + try { + STRING_TYPE = getType("java.lang.String"); + CLASS_TYPE = getType("java.lang.Class"); + THROWABLE_TYPE = getType("java.lang.Throwable"); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + + /** + * Execute the instruction, modeling the effects on the specified frame and subroutine. + * If a subroutine is passed, the access flags will be modified if this instruction accesses + * the local variable table. + * + * @param method the method containing the instruction + * @param pos the position of the instruction in the method + * @param iter the code iterator used to find the instruction + * @param frame the frame to modify to represent the result of the instruction + * @param subroutine the optional subroutine this instruction belongs to. + * @throws BadBytecode if the bytecode violates the jvm spec + */ + public void execute(MethodInfo method, int pos, CodeIterator iter, Frame frame, Subroutine subroutine) throws BadBytecode { + this.lastPos = pos; + int opcode = iter.byteAt(pos); + + + // Declared opcode in order + switch (opcode) { + case NOP: + break; + case ACONST_NULL: + frame.push(Type.UNINIT); + break; + case ICONST_M1: + case ICONST_0: + case ICONST_1: + case ICONST_2: + case ICONST_3: + case ICONST_4: + case ICONST_5: + frame.push(Type.INTEGER); + break; + case LCONST_0: + case LCONST_1: + frame.push(Type.LONG); + frame.push(Type.TOP); + break; + case FCONST_0: + case FCONST_1: + case FCONST_2: + frame.push(Type.FLOAT); + break; + case DCONST_0: + case DCONST_1: + frame.push(Type.DOUBLE); + frame.push(Type.TOP); + break; + case BIPUSH: + case SIPUSH: + frame.push(Type.INTEGER); + break; + case LDC: + evalLDC(iter.byteAt(pos + 1), frame); + break; + case LDC_W : + case LDC2_W : + evalLDC(iter.u16bitAt(pos + 1), frame); + break; + case ILOAD: + evalLoad(Type.INTEGER, iter.byteAt(pos + 1), frame, subroutine); + break; + case LLOAD: + evalLoad(Type.LONG, iter.byteAt(pos + 1), frame, subroutine); + break; + case FLOAD: + evalLoad(Type.FLOAT, iter.byteAt(pos + 1), frame, subroutine); + break; + case DLOAD: + evalLoad(Type.DOUBLE, iter.byteAt(pos + 1), frame, subroutine); + break; + case ALOAD: + evalLoad(Type.OBJECT, iter.byteAt(pos + 1), frame, subroutine); + break; + case ILOAD_0: + case ILOAD_1: + case ILOAD_2: + case ILOAD_3: + evalLoad(Type.INTEGER, opcode - ILOAD_0, frame, subroutine); + break; + case LLOAD_0: + case LLOAD_1: + case LLOAD_2: + case LLOAD_3: + evalLoad(Type.LONG, opcode - LLOAD_0, frame, subroutine); + break; + case FLOAD_0: + case FLOAD_1: + case FLOAD_2: + case FLOAD_3: + evalLoad(Type.FLOAT, opcode - FLOAD_0, frame, subroutine); + break; + case DLOAD_0: + case DLOAD_1: + case DLOAD_2: + case DLOAD_3: + evalLoad(Type.DOUBLE, opcode - DLOAD_0, frame, subroutine); + break; + case ALOAD_0: + case ALOAD_1: + case ALOAD_2: + case ALOAD_3: + evalLoad(Type.OBJECT, opcode - ALOAD_0, frame, subroutine); + break; + case IALOAD: + evalArrayLoad(Type.INTEGER, frame); + break; + case LALOAD: + evalArrayLoad(Type.LONG, frame); + break; + case FALOAD: + evalArrayLoad(Type.FLOAT, frame); + break; + case DALOAD: + evalArrayLoad(Type.DOUBLE, frame); + break; + case AALOAD: + evalArrayLoad(Type.OBJECT, frame); + break; + case BALOAD: + case CALOAD: + case SALOAD: + evalArrayLoad(Type.INTEGER, frame); + break; + case ISTORE: + evalStore(Type.INTEGER, iter.byteAt(pos + 1), frame, subroutine); + break; + case LSTORE: + evalStore(Type.LONG, iter.byteAt(pos + 1), frame, subroutine); + break; + case FSTORE: + evalStore(Type.FLOAT, iter.byteAt(pos + 1), frame, subroutine); + break; + case DSTORE: + evalStore(Type.DOUBLE, iter.byteAt(pos + 1), frame, subroutine); + break; + case ASTORE: + evalStore(Type.OBJECT, iter.byteAt(pos + 1), frame, subroutine); + break; + case ISTORE_0: + case ISTORE_1: + case ISTORE_2: + case ISTORE_3: + evalStore(Type.INTEGER, opcode - ISTORE_0, frame, subroutine); + break; + case LSTORE_0: + case LSTORE_1: + case LSTORE_2: + case LSTORE_3: + evalStore(Type.LONG, opcode - LSTORE_0, frame, subroutine); + break; + case FSTORE_0: + case FSTORE_1: + case FSTORE_2: + case FSTORE_3: + evalStore(Type.FLOAT, opcode - FSTORE_0, frame, subroutine); + break; + case DSTORE_0: + case DSTORE_1: + case DSTORE_2: + case DSTORE_3: + evalStore(Type.DOUBLE, opcode - DSTORE_0, frame, subroutine); + break; + case ASTORE_0: + case ASTORE_1: + case ASTORE_2: + case ASTORE_3: + evalStore(Type.OBJECT, opcode - ASTORE_0, frame, subroutine); + break; + case IASTORE: + evalArrayStore(Type.INTEGER, frame); + break; + case LASTORE: + evalArrayStore(Type.LONG, frame); + break; + case FASTORE: + evalArrayStore(Type.FLOAT, frame); + break; + case DASTORE: + evalArrayStore(Type.DOUBLE, frame); + break; + case AASTORE: + evalArrayStore(Type.OBJECT, frame); + break; + case BASTORE: + case CASTORE: + case SASTORE: + evalArrayStore(Type.INTEGER, frame); + break; + case POP: + if (frame.pop() == Type.TOP) + throw new BadBytecode("POP can not be used with a category 2 value, pos = " + pos); + break; + case POP2: + frame.pop(); + frame.pop(); + break; + case DUP: { + Type type = frame.peek(); + if (type == Type.TOP) + throw new BadBytecode("DUP can not be used with a category 2 value, pos = " + pos); + + frame.push(frame.peek()); + break; + } + case DUP_X1: + case DUP_X2: { + Type type = frame.peek(); + if (type == Type.TOP) + throw new BadBytecode("DUP can not be used with a category 2 value, pos = " + pos); + int end = frame.getTopIndex(); + int insert = end - (opcode - DUP_X1) - 1; + frame.push(type); + + while (end > insert) { + frame.setStack(end, frame.getStack(end - 1)); + end--; + } + frame.setStack(insert, type); + break; + } + case DUP2: + frame.push(frame.getStack(frame.getTopIndex() - 1)); + frame.push(frame.getStack(frame.getTopIndex() - 1)); + break; + case DUP2_X1: + case DUP2_X2: { + int end = frame.getTopIndex(); + int insert = end - (opcode - DUP2_X1) - 1; + Type type1 = frame.getStack(frame.getTopIndex() - 1); + Type type2 = frame.peek(); + frame.push(type1); + frame.push(type2); + while (end > insert) { + frame.setStack(end, frame.getStack(end - 2)); + end--; + } + frame.setStack(insert, type2); + frame.setStack(insert - 1, type1); + break; + } + case SWAP: { + Type type1 = frame.pop(); + Type type2 = frame.pop(); + if (type1.getSize() == 2 || type2.getSize() == 2) + throw new BadBytecode("Swap can not be used with category 2 values, pos = " + pos); + frame.push(type1); + frame.push(type2); + break; + } + + // Math + case IADD: + evalBinaryMath(Type.INTEGER, frame); + break; + case LADD: + evalBinaryMath(Type.LONG, frame); + break; + case FADD: + evalBinaryMath(Type.FLOAT, frame); + break; + case DADD: + evalBinaryMath(Type.DOUBLE, frame); + break; + case ISUB: + evalBinaryMath(Type.INTEGER, frame); + break; + case LSUB: + evalBinaryMath(Type.LONG, frame); + break; + case FSUB: + evalBinaryMath(Type.FLOAT, frame); + break; + case DSUB: + evalBinaryMath(Type.DOUBLE, frame); + break; + case IMUL: + evalBinaryMath(Type.INTEGER, frame); + break; + case LMUL: + evalBinaryMath(Type.LONG, frame); + break; + case FMUL: + evalBinaryMath(Type.FLOAT, frame); + break; + case DMUL: + evalBinaryMath(Type.DOUBLE, frame); + break; + case IDIV: + evalBinaryMath(Type.INTEGER, frame); + break; + case LDIV: + evalBinaryMath(Type.LONG, frame); + break; + case FDIV: + evalBinaryMath(Type.FLOAT, frame); + break; + case DDIV: + evalBinaryMath(Type.DOUBLE, frame); + break; + case IREM: + evalBinaryMath(Type.INTEGER, frame); + break; + case LREM: + evalBinaryMath(Type.LONG, frame); + break; + case FREM: + evalBinaryMath(Type.FLOAT, frame); + break; + case DREM: + evalBinaryMath(Type.DOUBLE, frame); + break; + + // Unary + case INEG: + verifyAssignable(Type.INTEGER, simplePeek(frame)); + break; + case LNEG: + verifyAssignable(Type.LONG, simplePeek(frame)); + break; + case FNEG: + verifyAssignable(Type.FLOAT, simplePeek(frame)); + break; + case DNEG: + verifyAssignable(Type.DOUBLE, simplePeek(frame)); + break; + + // Shifts + case ISHL: + evalShift(Type.INTEGER, frame); + break; + case LSHL: + evalShift(Type.LONG, frame); + break; + case ISHR: + evalShift(Type.INTEGER, frame); + break; + case LSHR: + evalShift(Type.LONG, frame); + break; + case IUSHR: + evalShift(Type.INTEGER,frame); + break; + case LUSHR: + evalShift(Type.LONG, frame); + break; + + // Bitwise Math + case IAND: + evalBinaryMath(Type.INTEGER, frame); + break; + case LAND: + evalBinaryMath(Type.LONG, frame); + break; + case IOR: + evalBinaryMath(Type.INTEGER, frame); + break; + case LOR: + evalBinaryMath(Type.LONG, frame); + break; + case IXOR: + evalBinaryMath(Type.INTEGER, frame); + break; + case LXOR: + evalBinaryMath(Type.LONG, frame); + break; + + case IINC: { + int index = iter.byteAt(pos + 1); + verifyAssignable(Type.INTEGER, frame.getLocal(index)); + access(index, Type.INTEGER, subroutine); + break; + } + + // Conversion + case I2L: + verifyAssignable(Type.INTEGER, simplePop(frame)); + simplePush(Type.LONG, frame); + break; + case I2F: + verifyAssignable(Type.INTEGER, simplePop(frame)); + simplePush(Type.FLOAT, frame); + break; + case I2D: + verifyAssignable(Type.INTEGER, simplePop(frame)); + simplePush(Type.DOUBLE, frame); + break; + case L2I: + verifyAssignable(Type.LONG, simplePop(frame)); + simplePush(Type.INTEGER, frame); + break; + case L2F: + verifyAssignable(Type.LONG, simplePop(frame)); + simplePush(Type.FLOAT, frame); + break; + case L2D: + verifyAssignable(Type.LONG, simplePop(frame)); + simplePush(Type.DOUBLE, frame); + break; + case F2I: + verifyAssignable(Type.FLOAT, simplePop(frame)); + simplePush(Type.INTEGER, frame); + break; + case F2L: + verifyAssignable(Type.FLOAT, simplePop(frame)); + simplePush(Type.LONG, frame); + break; + case F2D: + verifyAssignable(Type.FLOAT, simplePop(frame)); + simplePush(Type.DOUBLE, frame); + break; + case D2I: + verifyAssignable(Type.DOUBLE, simplePop(frame)); + simplePush(Type.INTEGER, frame); + break; + case D2L: + verifyAssignable(Type.DOUBLE, simplePop(frame)); + simplePush(Type.LONG, frame); + break; + case D2F: + verifyAssignable(Type.DOUBLE, simplePop(frame)); + simplePush(Type.FLOAT, frame); + break; + case I2B: + case I2C: + case I2S: + verifyAssignable(Type.INTEGER, frame.peek()); + break; + case LCMP: + verifyAssignable(Type.LONG, simplePop(frame)); + verifyAssignable(Type.LONG, simplePop(frame)); + frame.push(Type.INTEGER); + break; + case FCMPL: + case FCMPG: + verifyAssignable(Type.FLOAT, simplePop(frame)); + verifyAssignable(Type.FLOAT, simplePop(frame)); + frame.push(Type.INTEGER); + break; + case DCMPL: + case DCMPG: + verifyAssignable(Type.DOUBLE, simplePop(frame)); + verifyAssignable(Type.DOUBLE, simplePop(frame)); + frame.push(Type.INTEGER); + break; + + // Control flow + case IFEQ: + case IFNE: + case IFLT: + case IFGE: + case IFGT: + case IFLE: + verifyAssignable(Type.INTEGER, simplePop(frame)); + break; + case IF_ICMPEQ: + case IF_ICMPNE: + case IF_ICMPLT: + case IF_ICMPGE: + case IF_ICMPGT: + case IF_ICMPLE: + verifyAssignable(Type.INTEGER, simplePop(frame)); + verifyAssignable(Type.INTEGER, simplePop(frame)); + break; + case IF_ACMPEQ: + case IF_ACMPNE: + verifyAssignable(Type.OBJECT, simplePop(frame)); + verifyAssignable(Type.OBJECT, simplePop(frame)); + break; + case GOTO: + break; + case JSR: + frame.push(Type.RETURN_ADDRESS); + break; + case RET: + verifyAssignable(Type.RETURN_ADDRESS, frame.getLocal(iter.byteAt(pos + 1))); + break; + case TABLESWITCH: + case LOOKUPSWITCH: + case IRETURN: + verifyAssignable(Type.INTEGER, simplePop(frame)); + break; + case LRETURN: + verifyAssignable(Type.LONG, simplePop(frame)); + break; + case FRETURN: + verifyAssignable(Type.FLOAT, simplePop(frame)); + break; + case DRETURN: + verifyAssignable(Type.DOUBLE, simplePop(frame)); + break; + case ARETURN: + try { + CtClass returnType = Descriptor.getReturnType(method.getDescriptor(), classPool); + verifyAssignable(Type.get(returnType), simplePop(frame)); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + break; + case RETURN: + break; + case GETSTATIC: + evalGetField(opcode, iter.u16bitAt(pos + 1), frame); + break; + case PUTSTATIC: + evalPutField(opcode, iter.u16bitAt(pos + 1), frame); + break; + case GETFIELD: + evalGetField(opcode, iter.u16bitAt(pos + 1), frame); + break; + case PUTFIELD: + evalPutField(opcode, iter.u16bitAt(pos + 1), frame); + break; + case INVOKEVIRTUAL: + case INVOKESPECIAL: + case INVOKESTATIC: + evalInvokeMethod(opcode, iter.u16bitAt(pos + 1), frame); + break; + case INVOKEINTERFACE: + evalInvokeIntfMethod(opcode, iter.u16bitAt(pos + 1), frame); + break; + case INVOKEDYNAMIC: + evalInvokeDynamic(opcode, iter.u16bitAt(pos + 1), frame); + break; + case NEW: + frame.push(resolveClassInfo(constPool.getClassInfo(iter.u16bitAt(pos + 1)))); + break; + case NEWARRAY: + evalNewArray(pos, iter, frame); + break; + case ANEWARRAY: + evalNewObjectArray(pos, iter, frame); + break; + case ARRAYLENGTH: { + Type array = simplePop(frame); + if (! array.isArray() && array != Type.UNINIT) + throw new BadBytecode("Array length passed a non-array [pos = " + pos + "]: " + array); + frame.push(Type.INTEGER); + break; + } + case ATHROW: + verifyAssignable(THROWABLE_TYPE, simplePop(frame)); + break; + case CHECKCAST: + verifyAssignable(Type.OBJECT, simplePop(frame)); + frame.push(typeFromDesc(constPool.getClassInfoByDescriptor(iter.u16bitAt(pos + 1)))); + break; + case INSTANCEOF: + verifyAssignable(Type.OBJECT, simplePop(frame)); + frame.push(Type.INTEGER); + break; + case MONITORENTER: + case MONITOREXIT: + verifyAssignable(Type.OBJECT, simplePop(frame)); + break; + case WIDE: + evalWide(pos, iter, frame, subroutine); + break; + case MULTIANEWARRAY: + evalNewObjectArray(pos, iter, frame); + break; + case IFNULL: + case IFNONNULL: + verifyAssignable(Type.OBJECT, simplePop(frame)); + break; + case GOTO_W: + break; + case JSR_W: + frame.push(Type.RETURN_ADDRESS); + break; + } + } + + private Type zeroExtend(Type type) { + if (type == Type.SHORT || type == Type.BYTE || type == Type.CHAR || type == Type.BOOLEAN) + return Type.INTEGER; + + return type; + } + + private void evalArrayLoad(Type expectedComponent, Frame frame) throws BadBytecode { + Type index = frame.pop(); + Type array = frame.pop(); + + // Special case, an array defined by aconst_null + // TODO - we might need to be more inteligent about this + if (array == Type.UNINIT) { + verifyAssignable(Type.INTEGER, index); + if (expectedComponent == Type.OBJECT) { + simplePush(Type.UNINIT, frame); + } else { + simplePush(expectedComponent, frame); + } + return; + } + + Type component = array.getComponent(); + + if (component == null) + throw new BadBytecode("Not an array! [pos = " + lastPos + "]: " + component); + + component = zeroExtend(component); + + verifyAssignable(expectedComponent, component); + verifyAssignable(Type.INTEGER, index); + simplePush(component, frame); + } + + private void evalArrayStore(Type expectedComponent, Frame frame) throws BadBytecode { + Type value = simplePop(frame); + Type index = frame.pop(); + Type array = frame.pop(); + + if (array == Type.UNINIT) { + verifyAssignable(Type.INTEGER, index); + return; + } + + Type component = array.getComponent(); + + if (component == null) + throw new BadBytecode("Not an array! [pos = " + lastPos + "]: " + component); + + component = zeroExtend(component); + + verifyAssignable(expectedComponent, component); + verifyAssignable(Type.INTEGER, index); + + // This intentionally only checks for Object on aastore + // downconverting of an array (no casts) + // e.g. Object[] blah = new String[]; + // blah[2] = (Object) "test"; + // blah[3] = new Integer(); // compiler doesnt catch it (has legal bytecode), + // // but will throw arraystoreexception + if (expectedComponent == Type.OBJECT) { + verifyAssignable(expectedComponent, value); + } else { + verifyAssignable(component, value); + } + } + + private void evalBinaryMath(Type expected, Frame frame) throws BadBytecode { + Type value2 = simplePop(frame); + Type value1 = simplePop(frame); + + verifyAssignable(expected, value2); + verifyAssignable(expected, value1); + simplePush(value1, frame); + } + + private void evalGetField(int opcode, int index, Frame frame) throws BadBytecode { + String desc = constPool.getFieldrefType(index); + Type type = zeroExtend(typeFromDesc(desc)); + + if (opcode == GETFIELD) { + Type objectType = resolveClassInfo(constPool.getFieldrefClassName(index)); + verifyAssignable(objectType, simplePop(frame)); + } + + simplePush(type, frame); + } + + private void evalInvokeIntfMethod(int opcode, int index, Frame frame) throws BadBytecode { + String desc = constPool.getInterfaceMethodrefType(index); + Type[] types = paramTypesFromDesc(desc); + int i = types.length; + + while (i > 0) + verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); + + String classInfo = constPool.getInterfaceMethodrefClassName(index); + Type objectType = resolveClassInfo(classInfo); + verifyAssignable(objectType, simplePop(frame)); + + Type returnType = returnTypeFromDesc(desc); + if (returnType != Type.VOID) + simplePush(zeroExtend(returnType), frame); + } + + private void evalInvokeMethod(int opcode, int index, Frame frame) throws BadBytecode { + String desc = constPool.getMethodrefType(index); + Type[] types = paramTypesFromDesc(desc); + int i = types.length; + + while (i > 0) + verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); + + if (opcode != INVOKESTATIC) { + Type objectType = resolveClassInfo(constPool.getMethodrefClassName(index)); + verifyAssignable(objectType, simplePop(frame)); + } + + Type returnType = returnTypeFromDesc(desc); + if (returnType != Type.VOID) + simplePush(zeroExtend(returnType), frame); + } + + private void evalInvokeDynamic(int opcode, int index, Frame frame) throws BadBytecode { + String desc = constPool.getInvokeDynamicType(index); + Type[] types = paramTypesFromDesc(desc); + int i = types.length; + + while (i > 0) + verifyAssignable(zeroExtend(types[--i]), simplePop(frame)); + + // simplePop(frame); // assume CosntPool#REF_invokeStatic + + Type returnType = returnTypeFromDesc(desc); + if (returnType != Type.VOID) + simplePush(zeroExtend(returnType), frame); + } + + private void evalLDC(int index, Frame frame) throws BadBytecode { + int tag = constPool.getTag(index); + Type type; + switch (tag) { + case ConstPool.CONST_String: + type = STRING_TYPE; + break; + case ConstPool.CONST_Integer: + type = Type.INTEGER; + break; + case ConstPool.CONST_Float: + type = Type.FLOAT; + break; + case ConstPool.CONST_Long: + type = Type.LONG; + break; + case ConstPool.CONST_Double: + type = Type.DOUBLE; + break; + case ConstPool.CONST_Class: + type = CLASS_TYPE; + break; + default: + throw new BadBytecode("bad LDC [pos = " + lastPos + "]: " + tag); + } + + simplePush(type, frame); + } + + private void evalLoad(Type expected, int index, Frame frame, Subroutine subroutine) throws BadBytecode { + Type type = frame.getLocal(index); + + verifyAssignable(expected, type); + + simplePush(type, frame); + access(index, type, subroutine); + } + + private void evalNewArray(int pos, CodeIterator iter, Frame frame) throws BadBytecode { + verifyAssignable(Type.INTEGER, simplePop(frame)); + Type type = null; + int typeInfo = iter.byteAt(pos + 1); + switch (typeInfo) { + case T_BOOLEAN: + type = getType("boolean[]"); + break; + case T_CHAR: + type = getType("char[]"); + break; + case T_BYTE: + type = getType("byte[]"); + break; + case T_SHORT: + type = getType("short[]"); + break; + case T_INT: + type = getType("int[]"); + break; + case T_LONG: + type = getType("long[]"); + break; + case T_FLOAT: + type = getType("float[]"); + break; + case T_DOUBLE: + type = getType("double[]"); + break; + default: + throw new BadBytecode("Invalid array type [pos = " + pos + "]: " + typeInfo); + + } + + frame.push(type); + } + + private void evalNewObjectArray(int pos, CodeIterator iter, Frame frame) throws BadBytecode { + // Convert to x[] format + Type type = resolveClassInfo(constPool.getClassInfo(iter.u16bitAt(pos + 1))); + String name = type.getCtClass().getName(); + int opcode = iter.byteAt(pos); + int dimensions; + + if (opcode == MULTIANEWARRAY) { + dimensions = iter.byteAt(pos + 3); + } else { + name = name + "[]"; + dimensions = 1; + } + + while (dimensions-- > 0) { + verifyAssignable(Type.INTEGER, simplePop(frame)); + } + + simplePush(getType(name), frame); + } + + private void evalPutField(int opcode, int index, Frame frame) throws BadBytecode { + String desc = constPool.getFieldrefType(index); + Type type = zeroExtend(typeFromDesc(desc)); + + verifyAssignable(type, simplePop(frame)); + + if (opcode == PUTFIELD) { + Type objectType = resolveClassInfo(constPool.getFieldrefClassName(index)); + verifyAssignable(objectType, simplePop(frame)); + } + } + + private void evalShift(Type expected, Frame frame) throws BadBytecode { + Type value2 = simplePop(frame); + Type value1 = simplePop(frame); + + verifyAssignable(Type.INTEGER, value2); + verifyAssignable(expected, value1); + simplePush(value1, frame); + } + + private void evalStore(Type expected, int index, Frame frame, Subroutine subroutine) throws BadBytecode { + Type type = simplePop(frame); + + // RETURN_ADDRESS is allowed by ASTORE + if (! (expected == Type.OBJECT && type == Type.RETURN_ADDRESS)) + verifyAssignable(expected, type); + simpleSetLocal(index, type, frame); + access(index, type, subroutine); + } + + private void evalWide(int pos, CodeIterator iter, Frame frame, Subroutine subroutine) throws BadBytecode { + int opcode = iter.byteAt(pos + 1); + int index = iter.u16bitAt(pos + 2); + switch (opcode) { + case ILOAD: + evalLoad(Type.INTEGER, index, frame, subroutine); + break; + case LLOAD: + evalLoad(Type.LONG, index, frame, subroutine); + break; + case FLOAD: + evalLoad(Type.FLOAT, index, frame, subroutine); + break; + case DLOAD: + evalLoad(Type.DOUBLE, index, frame, subroutine); + break; + case ALOAD: + evalLoad(Type.OBJECT, index, frame, subroutine); + break; + case ISTORE: + evalStore(Type.INTEGER, index, frame, subroutine); + break; + case LSTORE: + evalStore(Type.LONG, index, frame, subroutine); + break; + case FSTORE: + evalStore(Type.FLOAT, index, frame, subroutine); + break; + case DSTORE: + evalStore(Type.DOUBLE, index, frame, subroutine); + break; + case ASTORE: + evalStore(Type.OBJECT, index, frame, subroutine); + break; + case IINC: + verifyAssignable(Type.INTEGER, frame.getLocal(index)); + break; + case RET: + verifyAssignable(Type.RETURN_ADDRESS, frame.getLocal(index)); + break; + default: + throw new BadBytecode("Invalid WIDE operand [pos = " + pos + "]: " + opcode); + } + + } + + private Type getType(String name) throws BadBytecode { + try { + return Type.get(classPool.get(name)); + } catch (NotFoundException e) { + throw new BadBytecode("Could not find class [pos = " + lastPos + "]: " + name); + } + } + + private Type[] paramTypesFromDesc(String desc) throws BadBytecode { + CtClass classes[] = null; + try { + classes = Descriptor.getParameterTypes(desc, classPool); + } catch (NotFoundException e) { + throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); + } + + if (classes == null) + throw new BadBytecode("Could not obtain parameters for descriptor [pos = " + lastPos + "]: " + desc); + + Type[] types = new Type[classes.length]; + for (int i = 0; i < types.length; i++) + types[i] = Type.get(classes[i]); + + return types; + } + + private Type returnTypeFromDesc(String desc) throws BadBytecode { + CtClass clazz = null; + try { + clazz = Descriptor.getReturnType(desc, classPool); + } catch (NotFoundException e) { + throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); + } + + if (clazz == null) + throw new BadBytecode("Could not obtain return type for descriptor [pos = " + lastPos + "]: " + desc); + + return Type.get(clazz); + } + + private Type simplePeek(Frame frame) { + Type type = frame.peek(); + return (type == Type.TOP) ? frame.getStack(frame.getTopIndex() - 1) : type; + } + + private Type simplePop(Frame frame) { + Type type = frame.pop(); + return (type == Type.TOP) ? frame.pop() : type; + } + + private void simplePush(Type type, Frame frame) { + frame.push(type); + if (type.getSize() == 2) + frame.push(Type.TOP); + } + + private void access(int index, Type type, Subroutine subroutine) { + if (subroutine == null) + return; + subroutine.access(index); + if (type.getSize() == 2) + subroutine.access(index + 1); + } + + private void simpleSetLocal(int index, Type type, Frame frame) { + frame.setLocal(index, type); + if (type.getSize() == 2) + frame.setLocal(index + 1, Type.TOP); + } + + private Type resolveClassInfo(String info) throws BadBytecode { + CtClass clazz = null; + try { + if (info.charAt(0) == '[') { + clazz = Descriptor.toCtClass(info, classPool); + } else { + clazz = classPool.get(info); + } + + } catch (NotFoundException e) { + throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); + } + + if (clazz == null) + throw new BadBytecode("Could not obtain type for descriptor [pos = " + lastPos + "]: " + info); + + return Type.get(clazz); + } + + private Type typeFromDesc(String desc) throws BadBytecode { + CtClass clazz = null; + try { + clazz = Descriptor.toCtClass(desc, classPool); + } catch (NotFoundException e) { + throw new BadBytecode("Could not find class in descriptor [pos = " + lastPos + "]: " + e.getMessage()); + } + + if (clazz == null) + throw new BadBytecode("Could not obtain type for descriptor [pos = " + lastPos + "]: " + desc); + + return Type.get(clazz); + } + + private void verifyAssignable(Type expected, Type type) throws BadBytecode { + if (! expected.isAssignableFrom(type)) + throw new BadBytecode("Expected type: " + expected + " Got: " + type + " [pos = " + lastPos + "]"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java new file mode 100644 index 0000000..10e87db --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java @@ -0,0 +1,289 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + + +/** + * Represents the stack frame and local variable table at a particular point in time. + * + * @author Jason T. Greene + */ +public class Frame { + private Type[] locals; + private Type[] stack; + private int top; + private boolean jsrMerged; + private boolean retMerged; + + /** + * Create a new frame with the specified local variable table size, and max stack size + * + * @param locals the number of local variable table entries + * @param stack the maximum stack size + */ + public Frame(int locals, int stack) { + this.locals = new Type[locals]; + this.stack = new Type[stack]; + } + + /** + * Returns the local varaible table entry at index. + * + * @param index the position in the table + * @return the type if one exists, or null if the position is empty + */ + public Type getLocal(int index) { + return locals[index]; + } + + /** + * Sets the local variable table entry at index to a type. + * + * @param index the position in the table + * @param type the type to set at the position + */ + public void setLocal(int index, Type type) { + locals[index] = type; + } + + + /** + * Returns the type on the stack at the specified index. + * + * @param index the position on the stack + * @return the type of the stack position + */ + public Type getStack(int index) { + return stack[index]; + } + + /** + * Sets the type of the stack position + * + * @param index the position on the stack + * @param type the type to set + */ + public void setStack(int index, Type type) { + stack[index] = type; + } + + /** + * Empties the stack + */ + public void clearStack() { + top = 0; + } + + /** + * Gets the index of the type sitting at the top of the stack. + * This is not to be confused with a length operation which + * would return the number of elements, not the position of + * the last element. + * + * @return the position of the element at the top of the stack + */ + public int getTopIndex() { + return top - 1; + } + + /** + * Returns the number of local variable table entries, specified + * at construction. + * + * @return the number of local variable table entries + */ + public int localsLength() { + return locals.length; + } + + /** + * Gets the top of the stack without altering it + * + * @return the top of the stack + */ + public Type peek() { + if (top < 1) + throw new IndexOutOfBoundsException("Stack is empty"); + + return stack[top - 1]; + } + + /** + * Alters the stack to contain one less element and return it. + * + * @return the element popped from the stack + */ + public Type pop() { + if (top < 1) + throw new IndexOutOfBoundsException("Stack is empty"); + return stack[--top]; + } + + /** + * Alters the stack by placing the passed type on the top + * + * @param type the type to add to the top + */ + public void push(Type type) { + stack[top++] = type; + } + + + /** + * Makes a shallow copy of this frame, i.e. the type instances will + * remain the same. + * + * @return the shallow copy + */ + public Frame copy() { + Frame frame = new Frame(locals.length, stack.length); + System.arraycopy(locals, 0, frame.locals, 0, locals.length); + System.arraycopy(stack, 0, frame.stack, 0, stack.length); + frame.top = top; + return frame; + } + + /** + * Makes a shallow copy of the stack portion of this frame. The local + * variable table size will be copied, but its contents will be empty. + * + * @return the shallow copy of the stack + */ + public Frame copyStack() { + Frame frame = new Frame(locals.length, stack.length); + System.arraycopy(stack, 0, frame.stack, 0, stack.length); + frame.top = top; + return frame; + } + + /** + * Merges all types on the stack of this frame instance with that of the specified frame. + * The local variable table is left untouched. + * + * @param frame the frame to merge the stack from + * @return true if any changes where made + */ + public boolean mergeStack(Frame frame) { + boolean changed = false; + if (top != frame.top) + throw new RuntimeException("Operand stacks could not be merged, they are different sizes!"); + + for (int i = 0; i < top; i++) { + if (stack[i] != null) { + Type prev = stack[i]; + Type merged = prev.merge(frame.stack[i]); + if (merged == Type.BOGUS) + throw new RuntimeException("Operand stacks could not be merged due to differing primitive types: pos = " + i); + + stack[i] = merged; + // always replace the instance in case a multi-interface type changes to a normal Type + if ((! merged.equals(prev)) || merged.popChanged()) { + changed = true; + } + } + } + + return changed; + } + + /** + * Merges all types on the stack and local variable table of this frame with that of the specified + * type. + * + * @param frame the frame to merge with + * @return true if any changes to this frame where made by this merge + */ + public boolean merge(Frame frame) { + boolean changed = false; + + // Local variable table + for (int i = 0; i < locals.length; i++) { + if (locals[i] != null) { + Type prev = locals[i]; + Type merged = prev.merge(frame.locals[i]); + // always replace the instance in case a multi-interface type changes to a normal Type + locals[i] = merged; + if (! merged.equals(prev) || merged.popChanged()) { + changed = true; + } + } else if (frame.locals[i] != null) { + locals[i] = frame.locals[i]; + changed = true; + } + } + + changed |= mergeStack(frame); + return changed; + } + + public String toString() { + StringBuffer buffer = new StringBuffer(); + + buffer.append("locals = ["); + for (int i = 0; i < locals.length; i++) { + buffer.append(locals[i] == null ? "empty" : locals[i].toString()); + if (i < locals.length - 1) + buffer.append(", "); + } + buffer.append("] stack = ["); + for (int i = 0; i < top; i++) { + buffer.append(stack[i]); + if (i < top - 1) + buffer.append(", "); + } + buffer.append("]"); + + return buffer.toString(); + } + + /** + * Whether or not state from the source JSR instruction has been merged + * + * @return true if JSR state has been merged + */ + boolean isJsrMerged() { + return jsrMerged; + } + + /** + * Sets whether of not the state from the source JSR instruction has been merged + * + * @param jsrMerged true if merged, otherwise false + */ + void setJsrMerged(boolean jsrMerged) { + this.jsrMerged = jsrMerged; + } + + /** + * Whether or not state from the RET instruction, of the subroutine that was jumped + * to has been merged. + * + * @return true if RET state has been merged + */ + boolean isRetMerged() { + return retMerged; + } + + /** + * Sets whether or not state from the RET instruction, of the subroutine that was jumped + * to has been merged. + * + * @param retMerged true if RET state has been merged + */ + void setRetMerged(boolean retMerged) { + this.retMerged = retMerged; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java new file mode 100644 index 0000000..84bd21c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java @@ -0,0 +1,148 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.io.PrintStream; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.InstructionPrinter; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; + +/** + * A utility class for printing a merged view of the frame state and the + * instructions of a method. + * + * @author Jason T. Greene + */ +public final class FramePrinter { + private final PrintStream stream; + + /** + * Constructs a bytecode printer. + */ + public FramePrinter(PrintStream stream) { + this.stream = stream; + } + + /** + * Prints all the methods declared in the given class. + */ + public static void print(CtClass clazz, PrintStream stream) { + (new FramePrinter(stream)).print(clazz); + } + + /** + * Prints all the methods declared in the given class. + */ + public void print(CtClass clazz) { + CtMethod[] methods = clazz.getDeclaredMethods(); + for (int i = 0; i < methods.length; i++) { + print(methods[i]); + } + } + + private String getMethodString(CtMethod method) { + try { + return Modifier.toString(method.getModifiers()) + " " + + method.getReturnType().getName() + " " + method.getName() + + Descriptor.toString(method.getSignature()) + ";"; + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + } + + /** + * Prints the instructions and the frame states of the given method. + */ + public void print(CtMethod method) { + stream.println("\n" + getMethodString(method)); + MethodInfo info = method.getMethodInfo2(); + ConstPool pool = info.getConstPool(); + CodeAttribute code = info.getCodeAttribute(); + if (code == null) + return; + + Frame[] frames; + try { + frames = (new Analyzer()).analyze(method.getDeclaringClass(), info); + } catch (BadBytecode e) { + throw new RuntimeException(e); + } + + int spacing = String.valueOf(code.getCodeLength()).length(); + + CodeIterator iterator = code.iterator(); + while (iterator.hasNext()) { + int pos; + try { + pos = iterator.next(); + } catch (BadBytecode e) { + throw new RuntimeException(e); + } + + stream.println(pos + ": " + InstructionPrinter.instructionString(iterator, pos, pool)); + + addSpacing(spacing + 3); + Frame frame = frames[pos]; + if (frame == null) { + stream.println("--DEAD CODE--"); + continue; + } + printStack(frame); + + addSpacing(spacing + 3); + printLocals(frame); + } + + } + + private void printStack(Frame frame) { + stream.print("stack ["); + int top = frame.getTopIndex(); + for (int i = 0; i <= top; i++) { + if (i > 0) + stream.print(", "); + Type type = frame.getStack(i); + stream.print(type); + } + stream.println("]"); + } + + private void printLocals(Frame frame) { + stream.print("locals ["); + int length = frame.localsLength(); + for (int i = 0; i < length; i++) { + if (i > 0) + stream.print(", "); + Type type = frame.getLocal(i); + stream.print(type == null ? "empty" : type.toString()); + } + stream.println("]"); + } + + private void addSpacing(int count) { + while (count-- > 0) + stream.print(' '); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java new file mode 100644 index 0000000..52e3b53 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java @@ -0,0 +1,57 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.NoSuchElementException; + +class IntQueue { + private static class Entry { + private IntQueue.Entry next; + private int value; + private Entry(int value) { + this.value = value; + } + } + private IntQueue.Entry head; + + private IntQueue.Entry tail; + + void add(int value) { + IntQueue.Entry entry = new Entry(value); + if (tail != null) + tail.next = entry; + tail = entry; + + if (head == null) + head = entry; + } + + boolean isEmpty() { + return head == null; + } + + int take() { + if (head == null) + throw new NoSuchElementException(); + + int value = head.value; + head = head.next; + if (head == null) + tail = null; + + return value; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java new file mode 100644 index 0000000..8a9eefa --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java @@ -0,0 +1,130 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; + +/** + * Represents an array of {@link MultiType} instances. + * + * @author Jason T. Greene + */ +public class MultiArrayType extends Type { + private MultiType component; + private int dims; + + public MultiArrayType(MultiType component, int dims) { + super(null); + this.component = component; + this.dims = dims; + } + + public CtClass getCtClass() { + CtClass clazz = component.getCtClass(); + if (clazz == null) + return null; + + ClassPool pool = clazz.getClassPool(); + if (pool == null) + pool = ClassPool.getDefault(); + + String name = arrayName(clazz.getName(), dims); + + try { + return pool.get(name); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + } + + boolean popChanged() { + return component.popChanged(); + } + + public int getDimensions() { + return dims; + } + + public Type getComponent() { + return dims == 1 ? (Type)component : new MultiArrayType(component, dims - 1); + } + + public int getSize() { + return 1; + } + + public boolean isArray() { + return true; + } + + public boolean isAssignableFrom(Type type) { + throw new UnsupportedOperationException("Not implemented"); + } + + public boolean isReference() { + return true; + } + + public boolean isAssignableTo(Type type) { + if (eq(type.getCtClass(), Type.OBJECT.getCtClass())) + return true; + + if (eq(type.getCtClass(), Type.CLONEABLE.getCtClass())) + return true; + + if (eq(type.getCtClass(), Type.SERIALIZABLE.getCtClass())) + return true; + + if (! type.isArray()) + return false; + + Type typeRoot = getRootComponent(type); + int typeDims = type.getDimensions(); + + if (typeDims > dims) + return false; + + if (typeDims < dims) { + if (eq(typeRoot.getCtClass(), Type.OBJECT.getCtClass())) + return true; + + if (eq(typeRoot.getCtClass(), Type.CLONEABLE.getCtClass())) + return true; + + if (eq(typeRoot.getCtClass(), Type.SERIALIZABLE.getCtClass())) + return true; + + return false; + } + + return component.isAssignableTo(typeRoot); + } + + public boolean equals(Object o) { + if (! (o instanceof MultiArrayType)) + return false; + MultiArrayType multi = (MultiArrayType)o; + + return component.equals(multi.component) && dims == multi.dims; + } + + public String toString() { + // follows the same detailed formating scheme as component + return arrayName(component.toString(), dims); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java new file mode 100644 index 0000000..6158535 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java @@ -0,0 +1,314 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; + +import com.wenshuo.agent.javassist.CtClass; + +/** + * MultiType represents an unresolved type. Whenever two {@code Type} + * instances are merged, if they share more than one super type (either an + * interface or a superclass), then a {@code MultiType} is used to + * represent the possible super types. The goal of a {@code MultiType} + * is to reduce the set of possible types down to a single resolved type. This + * is done by eliminating non-assignable types from the typeset when the + * {@code MultiType} is passed as an argument to + * {@link Type#isAssignableFrom(Type)}, as well as removing non-intersecting + * types during a merge. + * + * Note: Currently the {@code MultiType} instance is reused as much + * as possible so that updates are visible from all frames. In addition, all + * {@code MultiType} merge paths are also updated. This is somewhat + * hackish, but it appears to handle most scenarios. + * + * @author Jason T. Greene + */ + +/* TODO - A better, but more involved, approach would be to track the instruction + * offset that resulted in the creation of this type, and + * whenever the typeset changes, to force a merge on that position. This + * would require creating a new MultiType instance every time the typeset + * changes, and somehow communicating assignment changes to the Analyzer + */ +public class MultiType extends Type { + private Map interfaces; + private Type resolved; + private Type potentialClass; + private MultiType mergeSource; + private boolean changed = false; + + public MultiType(Map interfaces) { + this(interfaces, null); + } + + public MultiType(Map interfaces, Type potentialClass) { + super(null); + this.interfaces = interfaces; + this.potentialClass = potentialClass; + } + + /** + * Gets the class that corresponds with this type. If this information + * is not yet known, java.lang.Object will be returned. + */ + public CtClass getCtClass() { + if (resolved != null) + return resolved.getCtClass(); + + return Type.OBJECT.getCtClass(); + } + + /** + * Always returns null since this type is never used for an array. + */ + public Type getComponent() { + return null; + } + + /** + * Always returns 1, since this type is a reference. + */ + public int getSize() { + return 1; + } + + /** + * Always reutnrs false since this type is never used for an array + */ + public boolean isArray() { + return false; + } + + /** + * Returns true if the internal state has changed. + */ + boolean popChanged() { + boolean changed = this.changed; + this.changed = false; + return changed; + } + + public boolean isAssignableFrom(Type type) { + throw new UnsupportedOperationException("Not implemented"); + } + + public boolean isAssignableTo(Type type) { + if (resolved != null) + return type.isAssignableFrom(resolved); + + if (Type.OBJECT.equals(type)) + return true; + + if (potentialClass != null && !type.isAssignableFrom(potentialClass)) + potentialClass = null; + + Map map = mergeMultiAndSingle(this, type); + + if (map.size() == 1 && potentialClass == null) { + // Update previous merge paths to the same resolved type + resolved = Type.get((CtClass)map.values().iterator().next()); + propogateResolved(); + + return true; + } + + // Keep all previous merge paths up to date + if (map.size() >= 1) { + interfaces = map; + propogateState(); + + return true; + } + + if (potentialClass != null) { + resolved = potentialClass; + propogateResolved(); + + return true; + } + + return false; + } + + private void propogateState() { + MultiType source = mergeSource; + while (source != null) { + source.interfaces = interfaces; + source.potentialClass = potentialClass; + source = source.mergeSource; + } + } + + private void propogateResolved() { + MultiType source = mergeSource; + while (source != null) { + source.resolved = resolved; + source = source.mergeSource; + } + } + + /** + * Always returns true, since this type is always a reference. + * + * @return true + */ + public boolean isReference() { + return true; + } + + private Map getAllMultiInterfaces(MultiType type) { + Map map = new HashMap(); + + Iterator iter = type.interfaces.values().iterator(); + while (iter.hasNext()) { + CtClass intf = (CtClass)iter.next(); + map.put(intf.getName(), intf); + getAllInterfaces(intf, map); + } + + return map; + } + + + private Map mergeMultiInterfaces(MultiType type1, MultiType type2) { + Map map1 = getAllMultiInterfaces(type1); + Map map2 = getAllMultiInterfaces(type2); + + return findCommonInterfaces(map1, map2); + } + + private Map mergeMultiAndSingle(MultiType multi, Type single) { + Map map1 = getAllMultiInterfaces(multi); + Map map2 = getAllInterfaces(single.getCtClass(), null); + + return findCommonInterfaces(map1, map2); + } + + private boolean inMergeSource(MultiType source) { + while (source != null) { + if (source == this) + return true; + + source = source.mergeSource; + } + + return false; + } + + public Type merge(Type type) { + if (this == type) + return this; + + if (type == UNINIT) + return this; + + if (type == BOGUS) + return BOGUS; + + if (type == null) + return this; + + if (resolved != null) + return resolved.merge(type); + + if (potentialClass != null) { + Type mergePotential = potentialClass.merge(type); + if (! mergePotential.equals(potentialClass) || mergePotential.popChanged()) { + potentialClass = Type.OBJECT.equals(mergePotential) ? null : mergePotential; + changed = true; + } + } + + Map merged; + + if (type instanceof MultiType) { + MultiType multi = (MultiType)type; + + if (multi.resolved != null) { + merged = mergeMultiAndSingle(this, multi.resolved); + } else { + merged = mergeMultiInterfaces(multi, this); + if (! inMergeSource(multi)) + mergeSource = multi; + } + } else { + merged = mergeMultiAndSingle(this, type); + } + + // Keep all previous merge paths up to date + if (merged.size() > 1 || (merged.size() == 1 && potentialClass != null)) { + // Check for changes + if (merged.size() != interfaces.size()) { + changed = true; + } else if (changed == false){ + Iterator iter = merged.keySet().iterator(); + while (iter.hasNext()) + if (! interfaces.containsKey(iter.next())) + changed = true; + } + + interfaces = merged; + propogateState(); + + return this; + } + + if (merged.size() == 1) { + resolved = Type.get((CtClass) merged.values().iterator().next()); + } else if (potentialClass != null){ + resolved = potentialClass; + } else { + resolved = OBJECT; + } + + propogateResolved(); + + return resolved; + } + + public boolean equals(Object o) { + if (! (o instanceof MultiType)) + return false; + + MultiType multi = (MultiType) o; + if (resolved != null) + return resolved.equals(multi.resolved); + else if (multi.resolved != null) + return false; + + return interfaces.keySet().equals(multi.interfaces.keySet()); + } + + public String toString() { + if (resolved != null) + return resolved.toString(); + + StringBuffer buffer = new StringBuffer("{"); + Iterator iter = interfaces.keySet().iterator(); + while (iter.hasNext()) { + buffer.append(iter.next()); + buffer.append(", "); + } + buffer.setLength(buffer.length() - 2); + if (potentialClass != null) + buffer.append(", *").append(potentialClass.toString()); + buffer.append("}"); + return buffer.toString(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java new file mode 100644 index 0000000..2f6f254 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java @@ -0,0 +1,67 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +/** + * Represents a nested method subroutine (marked by JSR and RET). + * + * @author Jason T. Greene + */ +public class Subroutine { + //private Set callers = new HashSet(); + private List callers = new ArrayList(); + private Set access = new HashSet(); + private int start; + + public Subroutine(int start, int caller) { + this.start = start; + callers.add(new Integer(caller)); + } + + public void addCaller(int caller) { + callers.add(new Integer(caller)); + } + + public int start() { + return start; + } + + public void access(int index) { + access.add(new Integer(index)); + } + + public boolean isAccessed(int index) { + return access.contains(new Integer(index)); + } + + public Collection accessed() { + return access; + } + + public Collection callers() { + return callers; + } + + public String toString() { + return "start = " + start + " callers = " + callers.toString(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java new file mode 100644 index 0000000..2b43955 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java @@ -0,0 +1,157 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ExceptionTable; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.Opcode; + +/** + * Discovers the subroutines in a method, and tracks all callers. + * + * @author Jason T. Greene + */ +public class SubroutineScanner implements Opcode { + + private Subroutine[] subroutines; + Map subTable = new HashMap(); + Set done = new HashSet(); + + + public Subroutine[] scan(MethodInfo method) throws BadBytecode { + CodeAttribute code = method.getCodeAttribute(); + CodeIterator iter = code.iterator(); + + subroutines = new Subroutine[code.getCodeLength()]; + subTable.clear(); + done.clear(); + + scan(0, iter, null); + + ExceptionTable exceptions = code.getExceptionTable(); + for (int i = 0; i < exceptions.size(); i++) { + int handler = exceptions.handlerPc(i); + // If an exception is thrown in subroutine, the handler + // is part of the same subroutine. + scan(handler, iter, subroutines[exceptions.startPc(i)]); + } + + return subroutines; + } + + private void scan(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { + // Skip already processed blocks + if (done.contains(new Integer(pos))) + return; + + done.add(new Integer(pos)); + + int old = iter.lookAhead(); + iter.move(pos); + + boolean next; + do { + pos = iter.next(); + next = scanOp(pos, iter, sub) && iter.hasNext(); + } while (next); + + iter.move(old); + } + + private boolean scanOp(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { + subroutines[pos] = sub; + + int opcode = iter.byteAt(pos); + + if (opcode == TABLESWITCH) { + scanTableSwitch(pos, iter, sub); + + return false; + } + + if (opcode == LOOKUPSWITCH) { + scanLookupSwitch(pos, iter, sub); + + return false; + } + + // All forms of return and throw end current code flow + if (Util.isReturn(opcode) || opcode == RET || opcode == ATHROW) + return false; + + if (Util.isJumpInstruction(opcode)) { + int target = Util.getJumpTarget(pos, iter); + if (opcode == JSR || opcode == JSR_W) { + Subroutine s = (Subroutine) subTable.get(new Integer(target)); + if (s == null) { + s = new Subroutine(target, pos); + subTable.put(new Integer(target), s); + scan(target, iter, s); + } else { + s.addCaller(pos); + } + } else { + scan(target, iter, sub); + + // GOTO ends current code flow + if (Util.isGoto(opcode)) + return false; + } + } + + return true; + } + + private void scanLookupSwitch(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { + int index = (pos & ~3) + 4; + // default + scan(pos + iter.s32bitAt(index), iter, sub); + int npairs = iter.s32bitAt(index += 4); + int end = npairs * 8 + (index += 4); + + // skip "match" + for (index += 4; index < end; index += 8) { + int target = iter.s32bitAt(index) + pos; + scan(target, iter, sub); + } + } + + private void scanTableSwitch(int pos, CodeIterator iter, Subroutine sub) throws BadBytecode { + // Skip 4 byte alignment padding + int index = (pos & ~3) + 4; + // default + scan(pos + iter.s32bitAt(index), iter, sub); + int low = iter.s32bitAt(index += 4); + int high = iter.s32bitAt(index += 4); + int end = (high - low + 1) * 4 + (index += 4); + + // Offset table + for (; index < end; index += 4) { + int target = iter.s32bitAt(index) + pos; + scan(target, iter, sub); + } + } + + +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java new file mode 100644 index 0000000..41b36b3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java @@ -0,0 +1,593 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.IdentityHashMap; +import java.util.Iterator; +import java.util.Map; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; + +/** + * Represents a JVM type in data-flow analysis. This abstraction is necessary since + * a JVM type not only includes all normal Java types, but also a few special types + * that are used by the JVM internally. See the static field types on this class for + * more info on these special types. + * + * All primitive and special types reuse the same instance, so identity comparison can + * be used when examining them. Normal java types must use {@link #equals(Object)} to + * compare type instances. + * + * In most cases, applications which consume this API, only need to call {@link #getCtClass()} + * to obtain the needed type information. + * + * @author Jason T. Greene + */ +public class Type { + private final CtClass clazz; + private final boolean special; + + private static final Map prims = new IdentityHashMap(); + /** Represents the double primitive type */ + public static final Type DOUBLE = new Type(CtClass.doubleType); + /** Represents the boolean primitive type */ + public static final Type BOOLEAN = new Type(CtClass.booleanType); + /** Represents the long primitive type */ + public static final Type LONG = new Type(CtClass.longType); + /** Represents the char primitive type */ + public static final Type CHAR = new Type(CtClass.charType); + /** Represents the byte primitive type */ + public static final Type BYTE = new Type(CtClass.byteType); + /** Represents the short primitive type */ + public static final Type SHORT = new Type(CtClass.shortType); + /** Represents the integer primitive type */ + public static final Type INTEGER = new Type(CtClass.intType); + /** Represents the float primitive type */ + public static final Type FLOAT = new Type(CtClass.floatType); + /** Represents the void primitive type */ + public static final Type VOID = new Type(CtClass.voidType); + + /** + * Represents an unknown, or null type. This occurs when aconst_null is used. + * It is important not to treat this type as java.lang.Object, since a null can + * be assigned to any reference type. The analyzer will replace these with + * an actual known type if it can be determined by a merged path with known type + * information. If this type is encountered on a frame then it is guaranteed to + * be null, and the type information is simply not available. Any attempts to + * infer the type, without further information from the compiler would be a guess. + */ + public static final Type UNINIT = new Type(null); + + /** + * Represents an internal JVM return address, which is used by the RET + * instruction to return to a JSR that invoked the subroutine. + */ + public static final Type RETURN_ADDRESS = new Type(null, true); + + /** A placeholder used by the analyzer for the second word position of a double-word type */ + public static final Type TOP = new Type(null, true); + + /** + * Represents a non-accessible value. Code cannot access the value this type + * represents. It occurs when bytecode reuses a local variable table + * position with non-mergable types. An example would be compiled code which + * uses the same position for a primitive type in one branch, and a reference type + * in another branch. + */ + public static final Type BOGUS = new Type(null, true); + + /** Represents the java.lang.Object reference type */ + public static final Type OBJECT = lookupType("java.lang.Object"); + /** Represents the java.io.Serializable reference type */ + public static final Type SERIALIZABLE = lookupType("java.io.Serializable"); + /** Represents the java.lang.Coneable reference type */ + public static final Type CLONEABLE = lookupType("java.lang.Cloneable"); + /** Represents the java.lang.Throwable reference type */ + public static final Type THROWABLE = lookupType("java.lang.Throwable"); + + static { + prims.put(CtClass.doubleType, DOUBLE); + prims.put(CtClass.longType, LONG); + prims.put(CtClass.charType, CHAR); + prims.put(CtClass.shortType, SHORT); + prims.put(CtClass.intType, INTEGER); + prims.put(CtClass.floatType, FLOAT); + prims.put(CtClass.byteType, BYTE); + prims.put(CtClass.booleanType, BOOLEAN); + prims.put(CtClass.voidType, VOID); + + } + + /** + * Obtain the Type for a given class. If the class is a primitive, + * the the unique type instance for the primitive will be returned. + * Otherwise a new Type instance representing the class is returned. + * + * @param clazz The java class + * @return a type instance for this class + */ + public static Type get(CtClass clazz) { + Type type = (Type)prims.get(clazz); + return type != null ? type : new Type(clazz); + } + + private static Type lookupType(String name) { + try { + return new Type(ClassPool.getDefault().get(name)); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + } + + Type(CtClass clazz) { + this(clazz, false); + } + + private Type(CtClass clazz, boolean special) { + this.clazz = clazz; + this.special = special; + } + + // Used to indicate a merge internally triggered a change + boolean popChanged() { + return false; + } + + /** + * Gets the word size of this type. Double-word types, such as long and double + * will occupy two positions on the local variable table or stack. + * + * @return the number of words needed to hold this type + */ + public int getSize() { + return clazz == CtClass.doubleType || clazz == CtClass.longType || this == TOP ? 2 : 1; + } + + /** + * Returns the class this type represents. If the type is special, null will be returned. + * + * @return the class for this type, or null if special + */ + public CtClass getCtClass() { + return clazz; + } + + /** + * Returns whether or not this type is a normal java reference, i.e. it is or extends java.lang.Object. + * + * @return true if a java reference, false if a primitive or special + */ + public boolean isReference() { + return !special && (clazz == null || !clazz.isPrimitive()); + } + + /** + * Returns whether or not the type is special. A special type is one that is either used + * for internal tracking, or is only used internally by the JVM. + * + * @return true if special, false if not + */ + public boolean isSpecial() { + return special; + } + + /** + * Returns whether or not this type is an array. + * + * @return true if an array, false if not + */ + public boolean isArray() { + return clazz != null && clazz.isArray(); + } + + /** + * Returns the number of dimensions of this array. If the type is not an + * array zero is returned. + * + * @return zero if not an array, otherwise the number of array dimensions. + */ + public int getDimensions() { + if (!isArray()) return 0; + + String name = clazz.getName(); + int pos = name.length() - 1; + int count = 0; + while (name.charAt(pos) == ']' ) { + pos -= 2; + count++; + } + + return count; + } + + /** + * Returns the array component if this type is an array. If the type + * is not an array null is returned. + * + * @return the array component if an array, otherwise null + */ + public Type getComponent() { + if (this.clazz == null || !this.clazz.isArray()) + return null; + + CtClass component; + try { + component = this.clazz.getComponentType(); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + + Type type = (Type)prims.get(component); + return (type != null) ? type : new Type(component); + } + + /** + * Determines whether this type is assignable, to the passed type. + * A type is assignable to another if it is either the same type, or + * a sub-type. + * + * @param type the type to test assignability to + * @return true if this is assignable to type, otherwise false + */ + public boolean isAssignableFrom(Type type) { + if (this == type) + return true; + + if ((type == UNINIT && isReference()) || this == UNINIT && type.isReference()) + return true; + + if (type instanceof MultiType) + return ((MultiType)type).isAssignableTo(this); + + if (type instanceof MultiArrayType) + return ((MultiArrayType)type).isAssignableTo(this); + + + // Primitives and Special types must be identical + if (clazz == null || clazz.isPrimitive()) + return false; + + try { + return type.clazz.subtypeOf(clazz); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * Finds the common base type, or interface which both this and the specified + * type can be assigned. If there is more than one possible answer, then a {@link MultiType}, + * or a {@link MultiArrayType} is returned. Multi-types have special rules, + * and successive merges and assignment tests on them will alter their internal state, + * as well as other multi-types they have been merged with. This method is used by + * the data-flow analyzer to merge the type state from multiple branches. + * + * @param type the type to merge with + * @return the merged type + */ + public Type merge(Type type) { + if (type == this) + return this; + if (type == null) + return this; + if (type == Type.UNINIT) + return this; + if (this == Type.UNINIT) + return type; + + // Unequal primitives and special types can not be merged + if (! type.isReference() || ! this.isReference()) + return BOGUS; + + // Centralize merging of multi-interface types + if (type instanceof MultiType) + return type.merge(this); + + if (type.isArray() && this.isArray()) + return mergeArray(type); + + try { + return mergeClasses(type); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + } + + Type getRootComponent(Type type) { + while (type.isArray()) + type = type.getComponent(); + + return type; + } + + private Type createArray(Type rootComponent, int dims) { + if (rootComponent instanceof MultiType) + return new MultiArrayType((MultiType) rootComponent, dims); + + String name = arrayName(rootComponent.clazz.getName(), dims); + + Type type; + try { + type = Type.get(getClassPool(rootComponent).get(name)); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + + return type; + } + + String arrayName(String component, int dims) { + // Using char[] since we have no StringBuilder in JDK4, and StringBuffer is slow. + // Although, this is more efficient even if we did have one. + int i = component.length(); + int size = i + dims * 2; + char[] string = new char[size]; + component.getChars(0, i, string, 0); + while (i < size) { + string[i++] = '['; + string[i++] = ']'; + } + component = new String(string); + return component; + } + + private ClassPool getClassPool(Type rootComponent) { + ClassPool pool = rootComponent.clazz.getClassPool(); + return pool != null ? pool : ClassPool.getDefault(); + } + + private Type mergeArray(Type type) { + Type typeRoot = getRootComponent(type); + Type thisRoot = getRootComponent(this); + int typeDims = type.getDimensions(); + int thisDims = this.getDimensions(); + + // Array commponents can be merged when the dimensions are equal + if (typeDims == thisDims) { + Type mergedComponent = thisRoot.merge(typeRoot); + + // If the components can not be merged (a primitive component mixed with a different type) + // then Object is the common type. + if (mergedComponent == Type.BOGUS) + return Type.OBJECT; + + return createArray(mergedComponent, thisDims); + } + + Type targetRoot; + int targetDims; + + if (typeDims < thisDims) { + targetRoot = typeRoot; + targetDims = typeDims; + } else { + targetRoot = thisRoot; + targetDims = thisDims; + } + + // Special case, arrays are cloneable and serializable, so prefer them when dimensions differ + if (eq(CLONEABLE.clazz, targetRoot.clazz) || eq(SERIALIZABLE.clazz, targetRoot.clazz)) + return createArray(targetRoot, targetDims); + + return createArray(OBJECT, targetDims); + } + + private static CtClass findCommonSuperClass(CtClass one, CtClass two) throws NotFoundException { + CtClass deep = one; + CtClass shallow = two; + CtClass backupShallow = shallow; + CtClass backupDeep = deep; + + // Phase 1 - Find the deepest hierarchy, set deep and shallow correctly + for (;;) { + // In case we get lucky, and find a match early + if (eq(deep, shallow) && deep.getSuperclass() != null) + return deep; + + CtClass deepSuper = deep.getSuperclass(); + CtClass shallowSuper = shallow.getSuperclass(); + + if (shallowSuper == null) { + // right, now reset shallow + shallow = backupShallow; + break; + } + + if (deepSuper == null) { + // wrong, swap them, since deep is now useless, its our tmp before we swap it + deep = backupDeep; + backupDeep = backupShallow; + backupShallow = deep; + + deep = shallow; + shallow = backupShallow; + break; + } + + deep = deepSuper; + shallow = shallowSuper; + } + + // Phase 2 - Move deepBackup up by (deep end - deep) + for (;;) { + deep = deep.getSuperclass(); + if (deep == null) + break; + + backupDeep = backupDeep.getSuperclass(); + } + + deep = backupDeep; + + // Phase 3 - The hierarchy positions are now aligned + // The common super class is easy to find now + while (!eq(deep, shallow)) { + deep = deep.getSuperclass(); + shallow = shallow.getSuperclass(); + } + + return deep; + } + + private Type mergeClasses(Type type) throws NotFoundException { + CtClass superClass = findCommonSuperClass(this.clazz, type.clazz); + + // If its Object, then try and find a common interface(s) + if (superClass.getSuperclass() == null) { + Map interfaces = findCommonInterfaces(type); + if (interfaces.size() == 1) + return new Type((CtClass) interfaces.values().iterator().next()); + if (interfaces.size() > 1) + return new MultiType(interfaces); + + // Only Object is in common + return new Type(superClass); + } + + // Check for a common interface that is not on the found supertype + Map commonDeclared = findExclusiveDeclaredInterfaces(type, superClass); + if (commonDeclared.size() > 0) { + return new MultiType(commonDeclared, new Type(superClass)); + } + + return new Type(superClass); + } + + private Map findCommonInterfaces(Type type) { + Map typeMap = getAllInterfaces(type.clazz, null); + Map thisMap = getAllInterfaces(this.clazz, null); + + return findCommonInterfaces(typeMap, thisMap); + } + + private Map findExclusiveDeclaredInterfaces(Type type, CtClass exclude) { + Map typeMap = getDeclaredInterfaces(type.clazz, null); + Map thisMap = getDeclaredInterfaces(this.clazz, null); + Map excludeMap = getAllInterfaces(exclude, null); + + Iterator i = excludeMap.keySet().iterator(); + while (i.hasNext()) { + Object intf = i.next(); + typeMap.remove(intf); + thisMap.remove(intf); + } + + return findCommonInterfaces(typeMap, thisMap); + } + + + Map findCommonInterfaces(Map typeMap, Map alterMap) { + Iterator i = alterMap.keySet().iterator(); + while (i.hasNext()) { + if (! typeMap.containsKey(i.next())) + i.remove(); + } + + // Reduce to subinterfaces + // This does not need to be recursive since we make a copy, + // and that copy contains all super types for the whole hierarchy + i = new ArrayList(alterMap.values()).iterator(); + while (i.hasNext()) { + CtClass intf = (CtClass) i.next(); + CtClass[] interfaces; + try { + interfaces = intf.getInterfaces(); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + + for (int c = 0; c < interfaces.length; c++) + alterMap.remove(interfaces[c].getName()); + } + + return alterMap; + } + + Map getAllInterfaces(CtClass clazz, Map map) { + if (map == null) + map = new HashMap(); + + if (clazz.isInterface()) + map.put(clazz.getName(), clazz); + do { + try { + CtClass[] interfaces = clazz.getInterfaces(); + for (int i = 0; i < interfaces.length; i++) { + CtClass intf = interfaces[i]; + map.put(intf.getName(), intf); + getAllInterfaces(intf, map); + } + + clazz = clazz.getSuperclass(); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + } while (clazz != null); + + return map; + } + + Map getDeclaredInterfaces(CtClass clazz, Map map) { + if (map == null) + map = new HashMap(); + + if (clazz.isInterface()) + map.put(clazz.getName(), clazz); + + CtClass[] interfaces; + try { + interfaces = clazz.getInterfaces(); + } catch (NotFoundException e) { + throw new RuntimeException(e); + } + + for (int i = 0; i < interfaces.length; i++) { + CtClass intf = interfaces[i]; + map.put(intf.getName(), intf); + getDeclaredInterfaces(intf, map); + } + + return map; + } + + public boolean equals(Object o) { + if (! (o instanceof Type)) + return false; + + return o.getClass() == getClass() && eq(clazz, ((Type)o).clazz); + } + + static boolean eq(CtClass one, CtClass two) { + return one == two || (one != null && two != null && one.getName().equals(two.getName())); + } + + public String toString() { + if (this == BOGUS) + return "BOGUS"; + if (this == UNINIT) + return "UNINIT"; + if (this == RETURN_ADDRESS) + return "RETURN ADDRESS"; + if (this == TOP) + return "TOP"; + + return clazz == null ? "null" : clazz.getName(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java new file mode 100644 index 0000000..e935310 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java @@ -0,0 +1,48 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.analysis; + +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.Opcode; + +/** + * A set of common utility methods. + * + * @author Jason T. Greene + */ +public class Util implements Opcode { + public static int getJumpTarget(int pos, CodeIterator iter) { + int opcode = iter.byteAt(pos); + pos += (opcode == JSR_W || opcode == GOTO_W) ? iter.s32bitAt(pos + 1) : iter.s16bitAt(pos + 1); + return pos; + } + + public static boolean isJumpInstruction(int opcode) { + return (opcode >= IFEQ && opcode <= JSR) || opcode == IFNULL || opcode == IFNONNULL || opcode == JSR_W || opcode == GOTO_W; + } + + public static boolean isGoto(int opcode) { + return opcode == GOTO || opcode == GOTO_W; + } + + public static boolean isJsr(int opcode) { + return opcode == JSR || opcode == JSR_W; + } + + public static boolean isReturn(int opcode) { + return (opcode >= IRETURN && opcode <= RETURN); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html new file mode 100644 index 0000000..ec39a47 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html @@ -0,0 +1,20 @@ + + +Bytecode Analysis API. + +

This package provides an API for performing data-flow analysis on a method's bytecode. +This allows the user to determine the type state of the stack and local variable table +at the start of every instruction. In addition this API can be used to validate +bytecode, find dead bytecode, and identify unnecessary checkcasts. +Look at ControlFlow class first for details. + +

The users of this package must know the specifications of +class file and Java bytecode. For more details, read this book: + +

    Tim Lindholm and Frank Yellin, +"The Java Virtual Machine Specification 2nd Ed.", +Addison-Wesley, 1999. +
+ + + diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java new file mode 100644 index 0000000..fa93f9a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java @@ -0,0 +1,348 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.NotFoundException; + +import java.io.IOException; +import java.util.LinkedHashMap; +import java.util.Set; +import java.util.Iterator; + +/** + * The annotation structure. + * + *

An instance of this class is returned by + * getAnnotations() in AnnotationsAttribute + * or in ParameterAnnotationsAttribute. + * + * @see javassist.bytecode.AnnotationsAttribute#getAnnotations() + * @see javassist.bytecode.ParameterAnnotationsAttribute#getAnnotations() + * @see MemberValue + * @see MemberValueVisitor + * @see AnnotationsWriter + * + * @author Bill Burke + * @author Shigeru Chiba + * @author Adrian Brock + */ +public class Annotation { + static class Pair { + int name; + MemberValue value; + } + + ConstPool pool; + int typeIndex; + LinkedHashMap members; // this sould be LinkedHashMap + // but it is not supported by JDK 1.3. + + /** + * Constructs an annotation including no members. A member can be + * later added to the created annotation by addMemberValue(). + * + * @param type the index into the constant pool table. + * the entry at that index must be the + * CONSTANT_Utf8_Info structure + * repreenting the name of the annotation interface type. + * @param cp the constant pool table. + * + * @see #addMemberValue(String, MemberValue) + */ + public Annotation(int type, ConstPool cp) { + pool = cp; + typeIndex = type; + members = null; + } + + /** + * Constructs an annotation including no members. A member can be + * later added to the created annotation by addMemberValue(). + * + * @param typeName the name of the annotation interface type. + * @param cp the constant pool table. + * + * @see #addMemberValue(String, MemberValue) + */ + public Annotation(String typeName, ConstPool cp) { + this(cp.addUtf8Info(Descriptor.of(typeName)), cp); + } + + /** + * Constructs an annotation that can be accessed through the interface + * represented by clazz. The values of the members are + * not specified. + * + * @param cp the constant pool table. + * @param clazz the interface. + * @throws NotFoundException when the clazz is not found + */ + public Annotation(ConstPool cp, CtClass clazz) + throws NotFoundException + { + // todo Enums are not supported right now. + this(cp.addUtf8Info(Descriptor.of(clazz.getName())), cp); + + if (!clazz.isInterface()) + throw new RuntimeException( + "Only interfaces are allowed for Annotation creation."); + + CtMethod methods[] = clazz.getDeclaredMethods(); + if (methods.length > 0) { + members = new LinkedHashMap(); + } + + for (int i = 0; i < methods.length; i++) { + CtClass returnType = methods[i].getReturnType(); + addMemberValue(methods[i].getName(), + createMemberValue(cp, returnType)); + + } + } + + /** + * Makes an instance of MemberValue. + * + * @param cp the constant pool table. + * @param type the type of the member. + * @return the member value + * @throws NotFoundException when the type is not found + */ + public static MemberValue createMemberValue(ConstPool cp, CtClass type) + throws NotFoundException + { + if (type == CtClass.booleanType) + return new BooleanMemberValue(cp); + else if (type == CtClass.byteType) + return new ByteMemberValue(cp); + else if (type == CtClass.charType) + return new CharMemberValue(cp); + else if (type == CtClass.shortType) + return new ShortMemberValue(cp); + else if (type == CtClass.intType) + return new IntegerMemberValue(cp); + else if (type == CtClass.longType) + return new LongMemberValue(cp); + else if (type == CtClass.floatType) + return new FloatMemberValue(cp); + else if (type == CtClass.doubleType) + return new DoubleMemberValue(cp); + else if (type.getName().equals("java.lang.Class")) + return new ClassMemberValue(cp); + else if (type.getName().equals("java.lang.String")) + return new StringMemberValue(cp); + else if (type.isArray()) { + CtClass arrayType = type.getComponentType(); + MemberValue member = createMemberValue(cp, arrayType); + return new ArrayMemberValue(member, cp); + } + else if (type.isInterface()) { + Annotation info = new Annotation(cp, type); + return new AnnotationMemberValue(info, cp); + } + else { + // treat as enum. I know this is not typed, + // but JBoss has an Annotation Compiler for JDK 1.4 + // and I want it to work with that. - Bill Burke + EnumMemberValue emv = new EnumMemberValue(cp); + emv.setType(type.getName()); + return emv; + } + } + + /** + * Adds a new member. + * + * @param nameIndex the index into the constant pool table. + * The entry at that index must be + * a CONSTANT_Utf8_info structure. + * structure representing the member name. + * @param value the member value. + */ + public void addMemberValue(int nameIndex, MemberValue value) { + Pair p = new Pair(); + p.name = nameIndex; + p.value = value; + addMemberValue(p); + } + + /** + * Adds a new member. + * + * @param name the member name. + * @param value the member value. + */ + public void addMemberValue(String name, MemberValue value) { + Pair p = new Pair(); + p.name = pool.addUtf8Info(name); + p.value = value; + if (members == null) + members = new LinkedHashMap(); + + members.put(name, p); + } + + private void addMemberValue(Pair pair) { + String name = pool.getUtf8Info(pair.name); + if (members == null) + members = new LinkedHashMap(); + + members.put(name, pair); + } + + /** + * Returns a string representation of the annotation. + */ + public String toString() { + StringBuffer buf = new StringBuffer("@"); + buf.append(getTypeName()); + if (members != null) { + buf.append("("); + Iterator mit = members.keySet().iterator(); + while (mit.hasNext()) { + String name = (String)mit.next(); + buf.append(name).append("=").append(getMemberValue(name)); + if (mit.hasNext()) + buf.append(", "); + } + buf.append(")"); + } + + return buf.toString(); + } + + /** + * Obtains the name of the annotation type. + * + * @return the type name + */ + public String getTypeName() { + return Descriptor.toClassName(pool.getUtf8Info(typeIndex)); + } + + /** + * Obtains all the member names. + * + * @return null if no members are defined. + */ + public Set getMemberNames() { + if (members == null) + return null; + else + return members.keySet(); + } + + /** + * Obtains the member value with the given name. + * + *

If this annotation does not have a value for the + * specified member, + * this method returns null. It does not return a + * MemberValue with the default value. + * The default value can be obtained from the annotation type. + * + * @param name the member name + * @return null if the member cannot be found or if the value is + * the default value. + * + * @see javassist.bytecode.AnnotationDefaultAttribute + */ + public MemberValue getMemberValue(String name) { + if (members == null) + return null; + else { + Pair p = (Pair)members.get(name); + if (p == null) + return null; + else + return p.value; + } + } + + /** + * Constructs an annotation-type object representing this annotation. + * For example, if this annotation represents @Author, + * this method returns an Author object. + * + * @param cl class loader for loading an annotation type. + * @param cp class pool for obtaining class files. + * @return the annotation + * @throws ClassNotFoundException if the class cannot found. + * @throws NoSuchClassError if the class linkage fails. + */ + public Object toAnnotationType(ClassLoader cl, ClassPool cp) + throws ClassNotFoundException, NoSuchClassError + { + return AnnotationImpl.make(cl, + MemberValue.loadClass(cl, getTypeName()), + cp, this); + } + + /** + * Writes this annotation. + * + * @param writer the output. + * @throws IOException for an error during the write + */ + public void write(AnnotationsWriter writer) throws IOException { + String typeName = pool.getUtf8Info(typeIndex); + if (members == null) { + writer.annotation(typeName, 0); + return; + } + + writer.annotation(typeName, members.size()); + Iterator it = members.values().iterator(); + while (it.hasNext()) { + Pair pair = (Pair)it.next(); + writer.memberValuePair(pair.name); + pair.value.write(writer); + } + } + + /** + * Returns true if the given object represents the same annotation + * as this object. The equality test checks the member values. + */ + public boolean equals(Object obj) { + if (obj == this) + return true; + if (obj == null || obj instanceof Annotation == false) + return false; + + Annotation other = (Annotation) obj; + + if (getTypeName().equals(other.getTypeName()) == false) + return false; + + LinkedHashMap otherMembers = other.members; + if (members == otherMembers) + return true; + else if (members == null) + return otherMembers == null; + else + if (otherMembers == null) + return false; + else + return members.equals(otherMembers); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java new file mode 100644 index 0000000..faf72ad --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java @@ -0,0 +1,305 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import java.lang.reflect.InvocationHandler; +import java.lang.reflect.Method; +import java.lang.reflect.Proxy; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.AnnotationDefaultAttribute; +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; + +/** + * Internal-use only. This is a helper class internally used for implementing + * toAnnotationType() in Annotation. + * + * @author Shigeru Chiba + * @author Bill Burke + * @author Adrian Brock + */ +public class AnnotationImpl implements InvocationHandler { + private static final String JDK_ANNOTATION_CLASS_NAME = "java.lang.annotation.Annotation"; + private static Method JDK_ANNOTATION_TYPE_METHOD = null; + + private Annotation annotation; + private ClassPool pool; + private ClassLoader classLoader; + private transient Class annotationType; + private transient int cachedHashCode = Integer.MIN_VALUE; + + static { + // Try to resolve the JDK annotation type method + try { + Class clazz = Class.forName(JDK_ANNOTATION_CLASS_NAME); + JDK_ANNOTATION_TYPE_METHOD = clazz.getMethod("annotationType", (Class[])null); + } + catch (Exception ignored) { + // Probably not JDK5+ + } + } + + /** + * Constructs an annotation object. + * + * @param cl class loader for obtaining annotation types. + * @param clazz the annotation type. + * @param cp class pool for containing an annotation + * type (or null). + * @param anon the annotation. + * @return the annotation + */ + public static Object make(ClassLoader cl, Class clazz, ClassPool cp, + Annotation anon) { + AnnotationImpl handler = new AnnotationImpl(anon, cp, cl); + return Proxy.newProxyInstance(cl, new Class[] { clazz }, handler); + } + + private AnnotationImpl(Annotation a, ClassPool cp, ClassLoader loader) { + annotation = a; + pool = cp; + classLoader = loader; + } + + /** + * Obtains the name of the annotation type. + * + * @return the type name + */ + public String getTypeName() { + return annotation.getTypeName(); + } + + /** + * Get the annotation type + * + * @return the annotation class + * @throws NoClassDefFoundError when the class could not loaded + */ + private Class getAnnotationType() { + if (annotationType == null) { + String typeName = annotation.getTypeName(); + try { + annotationType = classLoader.loadClass(typeName); + } + catch (ClassNotFoundException e) { + NoClassDefFoundError error = new NoClassDefFoundError("Error loading annotation class: " + typeName); + error.setStackTrace(e.getStackTrace()); + throw error; + } + } + return annotationType; + } + + /** + * Obtains the internal data structure representing the annotation. + * + * @return the annotation + */ + public Annotation getAnnotation() { + return annotation; + } + + /** + * Executes a method invocation on a proxy instance. + * The implementations of toString(), equals(), + * and hashCode() are directly supplied by the + * AnnotationImpl. The annotationType() method + * is also available on the proxy instance. + */ + public Object invoke(Object proxy, Method method, Object[] args) + throws Throwable + { + String name = method.getName(); + if (Object.class == method.getDeclaringClass()) { + if ("equals".equals(name)) { + Object obj = args[0]; + return new Boolean(checkEquals(obj)); + } + else if ("toString".equals(name)) + return annotation.toString(); + else if ("hashCode".equals(name)) + return new Integer(hashCode()); + } + else if ("annotationType".equals(name) + && method.getParameterTypes().length == 0) + return getAnnotationType(); + + MemberValue mv = annotation.getMemberValue(name); + if (mv == null) + return getDefault(name, method); + else + return mv.getValue(classLoader, pool, method); + } + + private Object getDefault(String name, Method method) + throws ClassNotFoundException, RuntimeException + { + String classname = annotation.getTypeName(); + if (pool != null) { + try { + CtClass cc = pool.get(classname); + ClassFile cf = cc.getClassFile2(); + MethodInfo minfo = cf.getMethod(name); + if (minfo != null) { + AnnotationDefaultAttribute ainfo + = (AnnotationDefaultAttribute) + minfo.getAttribute(AnnotationDefaultAttribute.tag); + if (ainfo != null) { + MemberValue mv = ainfo.getDefaultValue(); + return mv.getValue(classLoader, pool, method); + } + } + } + catch (NotFoundException e) { + throw new RuntimeException("cannot find a class file: " + + classname); + } + } + + throw new RuntimeException("no default value: " + classname + "." + + name + "()"); + } + + /** + * Returns a hash code value for this object. + */ + public int hashCode() { + if (cachedHashCode == Integer.MIN_VALUE) { + int hashCode = 0; + + // Load the annotation class + getAnnotationType(); + + Method[] methods = annotationType.getDeclaredMethods(); + for (int i = 0; i < methods.length; ++ i) { + String name = methods[i].getName(); + int valueHashCode = 0; + + // Get the value + MemberValue mv = annotation.getMemberValue(name); + Object value = null; + try { + if (mv != null) + value = mv.getValue(classLoader, pool, methods[i]); + if (value == null) + value = getDefault(name, methods[i]); + } + catch (RuntimeException e) { + throw e; + } + catch (Exception e) { + throw new RuntimeException("Error retrieving value " + name + " for annotation " + annotation.getTypeName(), e); + } + + // Calculate the hash code + if (value != null) { + if (value.getClass().isArray()) + valueHashCode = arrayHashCode(value); + else + valueHashCode = value.hashCode(); + } + hashCode += 127 * name.hashCode() ^ valueHashCode; + } + + cachedHashCode = hashCode; + } + return cachedHashCode; + } + + /** + * Check that another annotation equals ourselves. + * + * @param obj the other annotation + * @return the true when equals false otherwise + * @throws Exception for any problem + */ + private boolean checkEquals(Object obj) throws Exception { + if (obj == null) + return false; + + // Optimization when the other is one of ourselves + if (obj instanceof Proxy) { + InvocationHandler ih = Proxy.getInvocationHandler(obj); + if (ih instanceof AnnotationImpl) { + AnnotationImpl other = (AnnotationImpl) ih; + return annotation.equals(other.annotation); + } + } + + Class otherAnnotationType = (Class) JDK_ANNOTATION_TYPE_METHOD.invoke(obj, (Object[])null); + if (getAnnotationType().equals(otherAnnotationType) == false) + return false; + + Method[] methods = annotationType.getDeclaredMethods(); + for (int i = 0; i < methods.length; ++ i) { + String name = methods[i].getName(); + + // Get the value + MemberValue mv = annotation.getMemberValue(name); + Object value = null; + Object otherValue = null; + try { + if (mv != null) + value = mv.getValue(classLoader, pool, methods[i]); + if (value == null) + value = getDefault(name, methods[i]); + otherValue = methods[i].invoke(obj, (Object[])null); + } + catch (RuntimeException e) { + throw e; + } + catch (Exception e) { + throw new RuntimeException("Error retrieving value " + name + " for annotation " + annotation.getTypeName(), e); + } + + if (value == null && otherValue != null) + return false; + if (value != null && value.equals(otherValue) == false) + return false; + } + + return true; + } + + /** + * Calculates the hashCode of an array using the same + * algorithm as java.util.Arrays.hashCode() + * + * @param object the object + * @return the hashCode + */ + private static int arrayHashCode(Object object) + { + if (object == null) + return 0; + + int result = 1; + + Object[] array = (Object[]) object; + for (int i = 0; i < array.length; ++i) { + int elementHashCode = 0; + if (array[i] != null) + elementHashCode = array[i].hashCode(); + result = 31 * result + elementHashCode; + } + return result; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java new file mode 100644 index 0000000..09932ec --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java @@ -0,0 +1,96 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Nested annotation. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class AnnotationMemberValue extends MemberValue { + Annotation value; + + /** + * Constructs an annotation member. The initial value is not specified. + */ + public AnnotationMemberValue(ConstPool cp) { + this(null, cp); + } + + /** + * Constructs an annotation member. The initial value is specified by + * the first parameter. + */ + public AnnotationMemberValue(Annotation a, ConstPool cp) { + super('@', cp); + value = a; + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) + throws ClassNotFoundException + { + return AnnotationImpl.make(cl, getType(cl), cp, value); + } + + Class getType(ClassLoader cl) throws ClassNotFoundException { + if (value == null) + throw new ClassNotFoundException("no type specified"); + else + return loadClass(cl, value.getTypeName()); + } + + /** + * Obtains the value. + */ + public Annotation getValue() { + return value; + } + + /** + * Sets the value of this member. + */ + public void setValue(Annotation newValue) { + value = newValue; + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return value.toString(); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.annotationValue(); + value.write(writer); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitAnnotationMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java new file mode 100644 index 0000000..33beb2d --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java @@ -0,0 +1,354 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import java.io.*; + +import com.wenshuo.agent.javassist.bytecode.ByteArray; +import com.wenshuo.agent.javassist.bytecode.ConstPool; + +/** + * A convenience class for constructing a + * ..Annotations_attribute. + * See the source code of the AnnotationsAttribute.Copier class. + * + *

The following code snippet is an example of use of this class: + * + * 

+ * ConstPool pool = ...;
+ * output = new ByteArrayOutputStream();
+ * writer = new AnnotationsWriter(output, pool);
+ *
+ * writer.numAnnotations(1);
+ * writer.annotation("Author", 2);
+ * writer.memberValuePair("name");      // element_value_pair
+ * writer.constValueIndex("chiba");
+ * writer.memberValuePair("address");   // element_value_pair
+ * writer.constValueIndex("tokyo");
+ *
+ * writer.close();
+ * byte[] attribute_info = output.toByteArray();
+ * AnnotationsAttribute anno
+ *     = new AnnotationsAttribute(pool, AnnotationsAttribute.visibleTag,
+ *                                attribute_info);
+ *
+ * + *

The code snippet above generates the annotation attribute + * corresponding to this annotation: + * + * 

+ *  @Author(name = "chiba", address = "tokyo")
+ *
+ * + * @see javassist.bytecode.AnnotationsAttribute + * @see javassist.bytecode.ParameterAnnotationsAttribute + */ +public class AnnotationsWriter { + protected OutputStream output; + private ConstPool pool; + + /** + * Constructs with the given output stream. + * + * @param os the output stream. + * @param cp the constant pool. + */ + public AnnotationsWriter(OutputStream os, ConstPool cp) { + output = os; + pool = cp; + } + + /** + * Obtains the constant pool given to the constructor. + */ + public ConstPool getConstPool() { + return pool; + } + + /** + * Closes the output stream. + * + */ + public void close() throws IOException { + output.close(); + } + + /** + * Writes num_parameters in + * Runtime(In)VisibleParameterAnnotations_attribute. + * This method must be followed by num calls to + * numAnnotations(). + */ + public void numParameters(int num) throws IOException { + output.write(num); + } + + /** + * Writes num_annotations in + * Runtime(In)VisibleAnnotations_attribute. + * This method must be followed by num calls to + * annotation(). + */ + public void numAnnotations(int num) throws IOException { + write16bit(num); + } + + /** + * Writes annotation. + * This method must be followed by numMemberValuePairs + * calls to memberValuePair(). + * + * @param type the annotation interface name. + * @param numMemberValuePairs num_element_value_pairs + * in annotation. + */ + public void annotation(String type, int numMemberValuePairs) + throws IOException + { + annotation(pool.addUtf8Info(type), numMemberValuePairs); + } + + /** + * Writes annotation. + * This method must be followed by numMemberValuePairs + * calls to memberValuePair(). + * + * @param typeIndex type_index in annotation. + * @param numMemberValuePairs num_element_value_pairs + * in annotation. + */ + public void annotation(int typeIndex, int numMemberValuePairs) + throws IOException + { + write16bit(typeIndex); + write16bit(numMemberValuePairs); + } + + /** + * Writes an element of a element_value_pairs array + * in annotation. + * This method must be followed by a + * call to constValueIndex(), enumConstValue(), + * etc. + * + * @param memberName the element name. + */ + public void memberValuePair(String memberName) throws IOException { + memberValuePair(pool.addUtf8Info(memberName)); + } + + /** + * Writes an element of a element_value_pairs array + * in annotation. + * This method must be followed by a + * call to constValueIndex(), enumConstValue(), + * etc. + * + * @param memberNameIndex element_name_index + * in element_value_pairs array. + */ + public void memberValuePair(int memberNameIndex) throws IOException { + write16bit(memberNameIndex); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(boolean value) throws IOException { + constValueIndex('Z', pool.addIntegerInfo(value ? 1 : 0)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(byte value) throws IOException { + constValueIndex('B', pool.addIntegerInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(char value) throws IOException { + constValueIndex('C', pool.addIntegerInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(short value) throws IOException { + constValueIndex('S', pool.addIntegerInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(int value) throws IOException { + constValueIndex('I', pool.addIntegerInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(long value) throws IOException { + constValueIndex('J', pool.addLongInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(float value) throws IOException { + constValueIndex('F', pool.addFloatInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(double value) throws IOException { + constValueIndex('D', pool.addDoubleInfo(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param value the constant value. + */ + public void constValueIndex(String value) throws IOException { + constValueIndex('s', pool.addUtf8Info(value)); + } + + /** + * Writes tag and const_value_index + * in element_value. + * + * @param tag tag in element_value. + * @param index const_value_index + * in element_value. + */ + public void constValueIndex(int tag, int index) + throws IOException + { + output.write(tag); + write16bit(index); + } + + /** + * Writes tag and enum_const_value + * in element_value. + * + * @param typeName the type name of the enum constant. + * @param constName the simple name of the enum constant. + */ + public void enumConstValue(String typeName, String constName) + throws IOException + { + enumConstValue(pool.addUtf8Info(typeName), + pool.addUtf8Info(constName)); + } + + /** + * Writes tag and enum_const_value + * in element_value. + * + * @param typeNameIndex type_name_index + * in element_value. + * @param constNameIndex const_name_index + * in element_value. + */ + public void enumConstValue(int typeNameIndex, int constNameIndex) + throws IOException + { + output.write('e'); + write16bit(typeNameIndex); + write16bit(constNameIndex); + } + + /** + * Writes tag and class_info_index + * in element_value. + * + * @param name the class name. + */ + public void classInfoIndex(String name) throws IOException { + classInfoIndex(pool.addUtf8Info(name)); + } + + /** + * Writes tag and class_info_index + * in element_value. + * + * @param index class_info_index + */ + public void classInfoIndex(int index) throws IOException { + output.write('c'); + write16bit(index); + } + + /** + * Writes tag and annotation_value + * in element_value. + * This method must be followed by a call to annotation(). + */ + public void annotationValue() throws IOException { + output.write('@'); + } + + /** + * Writes tag and array_value + * in element_value. + * This method must be followed by numValues calls + * to constValueIndex(), enumConstValue(), + * etc. + * + * @param numValues num_values + * in array_value. + */ + public void arrayValue(int numValues) throws IOException { + output.write('['); + write16bit(numValues); + } + + protected void write16bit(int value) throws IOException { + byte[] buf = new byte[2]; + ByteArray.write16bit(value, buf, 0); + output.write(buf); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java new file mode 100644 index 0000000..ff0ab0e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java @@ -0,0 +1,145 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Array; +import java.lang.reflect.Method; + +/** + * Array member. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class ArrayMemberValue extends MemberValue { + MemberValue type; + MemberValue[] values; + + /** + * Constructs an array. The initial value or type are not specified. + */ + public ArrayMemberValue(ConstPool cp) { + super('[', cp); + type = null; + values = null; + } + + /** + * Constructs an array. The initial value is not specified. + * + * @param t the type of the array elements. + */ + public ArrayMemberValue(MemberValue t, ConstPool cp) { + super('[', cp); + type = t; + values = null; + } + + Object getValue(ClassLoader cl, ClassPool cp, Method method) + throws ClassNotFoundException + { + if (values == null) + throw new ClassNotFoundException( + "no array elements found: " + method.getName()); + + int size = values.length; + Class clazz; + if (type == null) { + clazz = method.getReturnType().getComponentType(); + if (clazz == null || size > 0) + throw new ClassNotFoundException("broken array type: " + + method.getName()); + } + else + clazz = type.getType(cl); + + Object a = Array.newInstance(clazz, size); + for (int i = 0; i < size; i++) + Array.set(a, i, values[i].getValue(cl, cp, method)); + + return a; + } + + Class getType(ClassLoader cl) throws ClassNotFoundException { + if (type == null) + throw new ClassNotFoundException("no array type specified"); + + Object a = Array.newInstance(type.getType(cl), 0); + return a.getClass(); + } + + /** + * Obtains the type of the elements. + * + * @return null if the type is not specified. + */ + public MemberValue getType() { + return type; + } + + /** + * Obtains the elements of the array. + */ + public MemberValue[] getValue() { + return values; + } + + /** + * Sets the elements of the array. + */ + public void setValue(MemberValue[] elements) { + values = elements; + if (elements != null && elements.length > 0) + type = elements[0]; + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + StringBuffer buf = new StringBuffer("{"); + if (values != null) { + for (int i = 0; i < values.length; i++) { + buf.append(values[i].toString()); + if (i + 1 < values.length) + buf.append(", "); + } + } + + buf.append("}"); + return buf.toString(); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + int num = values.length; + writer.arrayValue(num); + for (int i = 0; i < num; ++i) + values[i].write(writer); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitArrayMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java new file mode 100644 index 0000000..c03c2bb --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java @@ -0,0 +1,103 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Boolean constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class BooleanMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a boolean constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Integer_info structure. + */ + public BooleanMemberValue(int index, ConstPool cp) { + super('Z', cp); + this.valueIndex = index; + } + + /** + * Constructs a boolean constant value. + * + * @param b the initial value. + */ + public BooleanMemberValue(boolean b, ConstPool cp) { + super('Z', cp); + setValue(b); + } + + /** + * Constructs a boolean constant value. The initial value is false. + */ + public BooleanMemberValue(ConstPool cp) { + super('Z', cp); + setValue(false); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Boolean(getValue()); + } + + Class getType(ClassLoader cl) { + return boolean.class; + } + + /** + * Obtains the value of the member. + */ + public boolean getValue() { + return cp.getIntegerInfo(valueIndex) != 0; + } + + /** + * Sets the value of the member. + */ + public void setValue(boolean newValue) { + valueIndex = cp.addIntegerInfo(newValue ? 1 : 0); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return getValue() ? "true" : "false"; + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitBooleanMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java new file mode 100644 index 0000000..c26d182 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java @@ -0,0 +1,103 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Byte constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class ByteMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a byte constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Integer_info structure. + */ + public ByteMemberValue(int index, ConstPool cp) { + super('B', cp); + this.valueIndex = index; + } + + /** + * Constructs a byte constant value. + * + * @param b the initial value. + */ + public ByteMemberValue(byte b, ConstPool cp) { + super('B', cp); + setValue(b); + } + + /** + * Constructs a byte constant value. The initial value is 0. + */ + public ByteMemberValue(ConstPool cp) { + super('B', cp); + setValue((byte)0); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Byte(getValue()); + } + + Class getType(ClassLoader cl) { + return byte.class; + } + + /** + * Obtains the value of the member. + */ + public byte getValue() { + return (byte)cp.getIntegerInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(byte newValue) { + valueIndex = cp.addIntegerInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Byte.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitByteMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java new file mode 100644 index 0000000..9fe9c4a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java @@ -0,0 +1,104 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Char constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class CharMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a char constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Integer_info structure. + */ + public CharMemberValue(int index, ConstPool cp) { + super('C', cp); + this.valueIndex = index; + } + + /** + * Constructs a char constant value. + * + * @param c the initial value. + */ + public CharMemberValue(char c, ConstPool cp) { + super('C', cp); + setValue(c); + } + + /** + * Constructs a char constant value. The initial value is '\0'. + */ + public CharMemberValue(ConstPool cp) { + super('C', cp); + setValue('\0'); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Character(getValue()); + } + + Class getType(ClassLoader cl) { + return char.class; + } + + /** + * Obtains the value of the member. + */ + public char getValue() { + return (char)cp.getIntegerInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(char newValue) { + valueIndex = cp.addIntegerInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Character.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitCharMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java new file mode 100644 index 0000000..4b3a697 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java @@ -0,0 +1,140 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.SignatureAttribute; + +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Class value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class ClassMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a class value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Utf8_info structure. + */ + public ClassMemberValue(int index, ConstPool cp) { + super('c', cp); + this.valueIndex = index; + } + + /** + * Constructs a class value. + * + * @param className the initial value. + */ + public ClassMemberValue(String className, ConstPool cp) { + super('c', cp); + setValue(className); + } + + /** + * Constructs a class value. + * The initial value is java.lang.Class. + */ + public ClassMemberValue(ConstPool cp) { + super('c', cp); + setValue("java.lang.Class"); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) + throws ClassNotFoundException { + final String classname = getValue(); + if (classname.equals("void")) + return void.class; + else if (classname.equals("int")) + return int.class; + else if (classname.equals("byte")) + return byte.class; + else if (classname.equals("long")) + return long.class; + else if (classname.equals("double")) + return double.class; + else if (classname.equals("float")) + return float.class; + else if (classname.equals("char")) + return char.class; + else if (classname.equals("short")) + return short.class; + else if (classname.equals("boolean")) + return boolean.class; + else + return loadClass(cl, classname); + } + + Class getType(ClassLoader cl) throws ClassNotFoundException { + return loadClass(cl, "java.lang.Class"); + } + + /** + * Obtains the value of the member. + * + * @return fully-qualified class name. + */ + public String getValue() { + String v = cp.getUtf8Info(valueIndex); + try { + return SignatureAttribute.toTypeSignature(v).jvmTypeName(); + } catch (BadBytecode e) { + throw new RuntimeException(e); + } + } + + /** + * Sets the value of the member. + * + * @param newClassName fully-qualified class name. + */ + public void setValue(String newClassName) { + String setTo = Descriptor.of(newClassName); + valueIndex = cp.addUtf8Info(setTo); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return getValue().replace('$', '.') + ".class"; + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.classInfoIndex(cp.getUtf8Info(valueIndex)); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitClassMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java new file mode 100644 index 0000000..fcfdad0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java @@ -0,0 +1,105 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Double floating-point number constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + * @version $Revision: 1.7 $ + */ +public class DoubleMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a double constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Double_info structure. + */ + public DoubleMemberValue(int index, ConstPool cp) { + super('D', cp); + this.valueIndex = index; + } + + /** + * Constructs a double constant value. + * + * @param d the initial value. + */ + public DoubleMemberValue(double d, ConstPool cp) { + super('D', cp); + setValue(d); + } + + /** + * Constructs a double constant value. The initial value is 0.0. + */ + public DoubleMemberValue(ConstPool cp) { + super('D', cp); + setValue(0.0); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Double(getValue()); + } + + Class getType(ClassLoader cl) { + return double.class; + } + + /** + * Obtains the value of the member. + */ + public double getValue() { + return cp.getDoubleInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(double newValue) { + valueIndex = cp.addDoubleInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Double.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitDoubleMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java new file mode 100644 index 0000000..fca4034 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java @@ -0,0 +1,126 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import java.io.IOException; +import java.lang.reflect.Method; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; + +/** + * Enum constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class EnumMemberValue extends MemberValue { + int typeIndex, valueIndex; + + /** + * Constructs an enum constant value. The initial value is specified + * by the constant pool entries at the given indexes. + * + * @param type the index of a CONSTANT_Utf8_info structure + * representing the enum type. + * @param value the index of a CONSTANT_Utf8_info structure. + * representing the enum value. + */ + public EnumMemberValue(int type, int value, ConstPool cp) { + super('e', cp); + this.typeIndex = type; + this.valueIndex = value; + } + + /** + * Constructs an enum constant value. + * The initial value is not specified. + */ + public EnumMemberValue(ConstPool cp) { + super('e', cp); + typeIndex = valueIndex = 0; + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) + throws ClassNotFoundException + { + try { + return getType(cl).getField(getValue()).get(null); + } + catch (NoSuchFieldException e) { + throw new ClassNotFoundException(getType() + "." + getValue()); + } + catch (IllegalAccessException e) { + throw new ClassNotFoundException(getType() + "." + getValue()); + } + } + + Class getType(ClassLoader cl) throws ClassNotFoundException { + return loadClass(cl, getType()); + } + + /** + * Obtains the enum type name. + * + * @return a fully-qualified type name. + */ + public String getType() { + return Descriptor.toClassName(cp.getUtf8Info(typeIndex)); + } + + /** + * Changes the enum type name. + * + * @param typename a fully-qualified type name. + */ + public void setType(String typename) { + typeIndex = cp.addUtf8Info(Descriptor.of(typename)); + } + + /** + * Obtains the name of the enum constant value. + */ + public String getValue() { + return cp.getUtf8Info(valueIndex); + } + + /** + * Changes the name of the enum constant value. + */ + public void setValue(String name) { + valueIndex = cp.addUtf8Info(name); + } + + public String toString() { + return getType() + "." + getValue(); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.enumConstValue(cp.getUtf8Info(typeIndex), getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitEnumMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java new file mode 100644 index 0000000..abb5095 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java @@ -0,0 +1,105 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Floating-point number constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + * @version $Revision: 1.7 $ + */ +public class FloatMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a float constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Float_info structure. + */ + public FloatMemberValue(int index, ConstPool cp) { + super('F', cp); + this.valueIndex = index; + } + + /** + * Constructs a float constant value. + * + * @param f the initial value. + */ + public FloatMemberValue(float f, ConstPool cp) { + super('F', cp); + setValue(f); + } + + /** + * Constructs a float constant value. The initial value is 0.0. + */ + public FloatMemberValue(ConstPool cp) { + super('F', cp); + setValue(0.0F); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Float(getValue()); + } + + Class getType(ClassLoader cl) { + return float.class; + } + + /** + * Obtains the value of the member. + */ + public float getValue() { + return cp.getFloatInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(float newValue) { + valueIndex = cp.addFloatInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Float.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitFloatMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java new file mode 100644 index 0000000..a112e4c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java @@ -0,0 +1,110 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Integer constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class IntegerMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs an int constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Integer_info structure. + */ + public IntegerMemberValue(int index, ConstPool cp) { + super('I', cp); + this.valueIndex = index; + } + + /** + * Constructs an int constant value. + * Note that this constructor receives the initial value + * as the second parameter + * unlike the corresponding constructors in the sibling classes. + * This is for making a difference from the constructor that receives + * an index into the constant pool table as the first parameter. + * Note that the index is also int type. + * + * @param value the initial value. + */ + public IntegerMemberValue(ConstPool cp, int value) { + super('I', cp); + setValue(value); + } + + /** + * Constructs an int constant value. The initial value is 0. + */ + public IntegerMemberValue(ConstPool cp) { + super('I', cp); + setValue(0); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Integer(getValue()); + } + + Class getType(ClassLoader cl) { + return int.class; + } + + /** + * Obtains the value of the member. + */ + public int getValue() { + return cp.getIntegerInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(int newValue) { + valueIndex = cp.addIntegerInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Integer.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitIntegerMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java new file mode 100644 index 0000000..9be1876 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java @@ -0,0 +1,104 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Long integer constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class LongMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a long constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Long_info structure. + */ + public LongMemberValue(int index, ConstPool cp) { + super('J', cp); + this.valueIndex = index; + } + + /** + * Constructs a long constant value. + * + * @param j the initial value. + */ + public LongMemberValue(long j, ConstPool cp) { + super('J', cp); + setValue(j); + } + + /** + * Constructs a long constant value. The initial value is 0. + */ + public LongMemberValue(ConstPool cp) { + super('J', cp); + setValue(0L); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Long(getValue()); + } + + Class getType(ClassLoader cl) { + return long.class; + } + + /** + * Obtains the value of the member. + */ + public long getValue() { + return cp.getLongInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(long newValue) { + valueIndex = cp.addLongInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Long.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitLongMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java new file mode 100644 index 0000000..fcbd86f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java @@ -0,0 +1,89 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; + +import java.io.IOException; +import java.lang.reflect.Array; +import java.lang.reflect.Method; + +/** + * The value of a member declared in an annotation. + * + * @see Annotation#getMemberValue(String) + * @author Bill Burke + * @author Shigeru Chiba + */ +public abstract class MemberValue { + ConstPool cp; + char tag; + + MemberValue(char tag, ConstPool cp) { + this.cp = cp; + this.tag = tag; + } + + /** + * Returns the value. If the value type is a primitive type, the + * returned value is boxed. + */ + abstract Object getValue(ClassLoader cl, ClassPool cp, Method m) + throws ClassNotFoundException; + + abstract Class getType(ClassLoader cl) throws ClassNotFoundException; + + static Class loadClass(ClassLoader cl, String classname) + throws ClassNotFoundException, NoSuchClassError + { + try { + return Class.forName(convertFromArray(classname), true, cl); + } + catch (LinkageError e) { + throw new NoSuchClassError(classname, e); + } + } + + private static String convertFromArray(String classname) + { + int index = classname.indexOf("[]"); + if (index != -1) { + String rawType = classname.substring(0, index); + StringBuffer sb = new StringBuffer(Descriptor.of(rawType)); + while (index != -1) { + sb.insert(0, "["); + index = classname.indexOf("[]", index + 1); + } + return sb.toString().replace('/', '.'); + } + return classname; + } + + /** + * Accepts a visitor. + */ + public abstract void accept(MemberValueVisitor visitor); + + /** + * Writes the value. + */ + public abstract void write(AnnotationsWriter w) throws IOException; +} + + diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java new file mode 100644 index 0000000..e20d31e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java @@ -0,0 +1,39 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +/** + * Visitor for traversing member values included in an annotation. + * + * @see MemberValue#accept(MemberValueVisitor) + * @author Bill Burke + */ +public interface MemberValueVisitor { + public void visitAnnotationMemberValue(AnnotationMemberValue node); + public void visitArrayMemberValue(ArrayMemberValue node); + public void visitBooleanMemberValue(BooleanMemberValue node); + public void visitByteMemberValue(ByteMemberValue node); + public void visitCharMemberValue(CharMemberValue node); + public void visitDoubleMemberValue(DoubleMemberValue node); + public void visitEnumMemberValue(EnumMemberValue node); + public void visitFloatMemberValue(FloatMemberValue node); + public void visitIntegerMemberValue(IntegerMemberValue node); + public void visitLongMemberValue(LongMemberValue node); + public void visitShortMemberValue(ShortMemberValue node); + public void visitStringMemberValue(StringMemberValue node); + public void visitClassMemberValue(ClassMemberValue node); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java new file mode 100644 index 0000000..9b99786 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java @@ -0,0 +1,40 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +/** + * Thrown if the linkage fails. + * It keeps the name of the class that caused this error. + */ +public class NoSuchClassError extends Error { + private String className; + + /** + * Constructs an exception. + */ + public NoSuchClassError(String className, Error cause) { + super(cause.toString(), cause); + this.className = className; + } + + /** + * Returns the name of the class not found. + */ + public String getClassName() { + return className; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java new file mode 100644 index 0000000..8dd4970 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java @@ -0,0 +1,104 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * Short integer constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class ShortMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a short constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Integer_info structure. + */ + public ShortMemberValue(int index, ConstPool cp) { + super('S', cp); + this.valueIndex = index; + } + + /** + * Constructs a short constant value. + * + * @param s the initial value. + */ + public ShortMemberValue(short s, ConstPool cp) { + super('S', cp); + setValue(s); + } + + /** + * Constructs a short constant value. The initial value is 0. + */ + public ShortMemberValue(ConstPool cp) { + super('S', cp); + setValue((short)0); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return new Short(getValue()); + } + + Class getType(ClassLoader cl) { + return short.class; + } + + /** + * Obtains the value of the member. + */ + public short getValue() { + return (short)cp.getIntegerInfo(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(short newValue) { + valueIndex = cp.addIntegerInfo(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return Short.toString(getValue()); + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitShortMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java new file mode 100644 index 0000000..61ac276 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java @@ -0,0 +1,104 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 2004 Bill Burke. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.annotation; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import java.io.IOException; +import java.lang.reflect.Method; + +/** + * String constant value. + * + * @author Bill Burke + * @author Shigeru Chiba + */ +public class StringMemberValue extends MemberValue { + int valueIndex; + + /** + * Constructs a string constant value. The initial value is specified + * by the constant pool entry at the given index. + * + * @param index the index of a CONSTANT_Utf8_info structure. + */ + public StringMemberValue(int index, ConstPool cp) { + super('s', cp); + this.valueIndex = index; + } + + /** + * Constructs a string constant value. + * + * @param str the initial value. + */ + public StringMemberValue(String str, ConstPool cp) { + super('s', cp); + setValue(str); + } + + /** + * Constructs a string constant value. The initial value is "". + */ + public StringMemberValue(ConstPool cp) { + super('s', cp); + setValue(""); + } + + Object getValue(ClassLoader cl, ClassPool cp, Method m) { + return getValue(); + } + + Class getType(ClassLoader cl) { + return String.class; + } + + /** + * Obtains the value of the member. + */ + public String getValue() { + return cp.getUtf8Info(valueIndex); + } + + /** + * Sets the value of the member. + */ + public void setValue(String newValue) { + valueIndex = cp.addUtf8Info(newValue); + } + + /** + * Obtains the string representation of this object. + */ + public String toString() { + return "\"" + getValue() + "\""; + } + + /** + * Writes the value. + */ + public void write(AnnotationsWriter writer) throws IOException { + writer.constValueIndex(getValue()); + } + + /** + * Accepts a visitor. + */ + public void accept(MemberValueVisitor visitor) { + visitor.visitStringMemberValue(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java new file mode 100644 index 0000000..c35185e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java @@ -0,0 +1,174 @@ +package com.wenshuo.agent.javassist.bytecode.annotation; + +import java.io.IOException; +import java.io.OutputStream; + +import com.wenshuo.agent.javassist.bytecode.ConstPool; + +/** + * A convenience class for constructing a + * {@code ..TypeAnnotations_attribute}. + * See the source code of the {@link javassist.bytecode.TypeAnnotationsAttribute} class. + * + * @since 3.19 + */ +public class TypeAnnotationsWriter extends AnnotationsWriter { + /** + * Constructs with the given output stream. + * + * @param os the output stream. + * @param cp the constant pool. + */ + public TypeAnnotationsWriter(OutputStream os, ConstPool cp) { + super(os, cp); + } + + /** + * Writes {@code num_annotations} in + * {@code Runtime(In)VisibleTypeAnnotations_attribute}. + * It must be followed by {@code num} instances of {@code type_annotation}. + */ + public void numAnnotations(int num) throws IOException { + super.numAnnotations(num); + } + + /** + * Writes {@code target_type} and {@code type_parameter_target} + * of {@code target_info} union. + */ + public void typeParameterTarget(int targetType, int typeParameterIndex) + throws IOException + { + output.write(targetType); + output.write(typeParameterIndex); + } + + /** + * Writes {@code target_type} and {@code supertype_target} + * of {@code target_info} union. + */ + public void supertypeTarget(int supertypeIndex) + throws IOException + { + output.write(0x10); + write16bit(supertypeIndex); + } + + /** + * Writes {@code target_type} and {@code type_parameter_bound_target} + * of {@code target_info} union. + */ + public void typeParameterBoundTarget(int targetType, int typeParameterIndex, int boundIndex) + throws IOException + { + output.write(targetType); + output.write(typeParameterIndex); + output.write(boundIndex); + } + + /** + * Writes {@code target_type} and {@code empty_target} + * of {@code target_info} union. + */ + public void emptyTarget(int targetType) throws IOException { + output.write(targetType); + } + + /** + * Writes {@code target_type} and {@code type_parameter_target} + * of {@code target_info} union. + */ + public void formalParameterTarget(int formalParameterIndex) + throws IOException + { + output.write(0x16); + output.write(formalParameterIndex); + } + + /** + * Writes {@code target_type} and {@code throws_target} + * of {@code target_info} union. + */ + public void throwsTarget(int throwsTypeIndex) + throws IOException + { + output.write(0x17); + write16bit(throwsTypeIndex); + } + + /** + * Writes {@code target_type} and {@code localvar_target} + * of {@code target_info} union. + * It must be followed by {@code tableLength} calls + * to {@code localVarTargetTable}. + */ + public void localVarTarget(int targetType, int tableLength) + throws IOException + { + output.write(targetType); + write16bit(tableLength); + } + + /** + * Writes an element of {@code table[]} of {@code localvar_target} + * of {@code target_info} union. + */ + public void localVarTargetTable(int startPc, int length, int index) + throws IOException + { + write16bit(startPc); + write16bit(length); + write16bit(index); + } + + /** + * Writes {@code target_type} and {@code catch_target} + * of {@code target_info} union. + */ + public void catchTarget(int exceptionTableIndex) + throws IOException + { + output.write(0x42); + write16bit(exceptionTableIndex); + } + + /** + * Writes {@code target_type} and {@code offset_target} + * of {@code target_info} union. + */ + public void offsetTarget(int targetType, int offset) + throws IOException + { + output.write(targetType); + write16bit(offset); + } + + /** + * Writes {@code target_type} and {@code type_argument_target} + * of {@code target_info} union. + */ + public void typeArgumentTarget(int targetType, int offset, int type_argument_index) + throws IOException + { + output.write(targetType); + write16bit(offset); + output.write(type_argument_index); + } + + /** + * Writes {@code path_length} of {@code type_path}. + */ + public void typePath(int pathLength) throws IOException { + output.write(pathLength); + } + + /** + * Writes an element of {@code path[]} of {@code type_path}. + */ + public void typePathPath(int typePathKind, int typeArgumentIndex) + throws IOException + { + output.write(typePathKind); + output.write(typeArgumentIndex); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html new file mode 100644 index 0000000..d0656db --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html @@ -0,0 +1,8 @@ + + +Bytecode-level Annotations API. + +

This package provides low-level API for editing annotations attributes. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html b/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html new file mode 100644 index 0000000..9da3888 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html @@ -0,0 +1,18 @@ + + +Bytecode-level API. + +

This package provides low-level API for editing a raw class file. +It allows the users to read and modify a constant pool entry, a single +bytecode instruction, and so on. + +

The users of this package must know the specifications of +class file and Java bytecode. For more details, read this book: + +

    Tim Lindholm and Frank Yellin, +"The Java Virtual Machine Specification 2nd Ed.", +Addison-Wesley, 1999. +
+ + + diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java new file mode 100644 index 0000000..f85821b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java @@ -0,0 +1,411 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import com.wenshuo.agent.javassist.bytecode.*; +import java.util.HashMap; +import java.util.ArrayList; + +/** + * A basic block is a sequence of bytecode that does not contain jump/branch + * instructions except at the last bytecode. + * Since Java7 or later does not allow JSR, this class throws an exception when + * it finds JSR. + */ +public class BasicBlock { + static class JsrBytecode extends BadBytecode { + JsrBytecode() { super("JSR"); } + } + + protected int position, length; + protected int incoming; // the number of incoming branches. + protected BasicBlock[] exit; // null if the block is a leaf. + protected boolean stop; // true if the block ends with an unconditional jump. + protected Catch toCatch; + + protected BasicBlock(int pos) { + position = pos; + length = 0; + incoming = 0; + } + + public static BasicBlock find(BasicBlock[] blocks, int pos) + throws BadBytecode + { + for (int i = 0; i < blocks.length; i++) { + int iPos = blocks[i].position; + if (iPos <= pos && pos < iPos + blocks[i].length) + return blocks[i]; + } + + throw new BadBytecode("no basic block at " + pos); + } + + public static class Catch { + public Catch next; + public BasicBlock body; + public int typeIndex; + Catch(BasicBlock b, int i, Catch c) { + body = b; + typeIndex = i; + next = c; + } + } + + public String toString() { + StringBuffer sbuf = new StringBuffer(); + String cname = this.getClass().getName(); + int i = cname.lastIndexOf('.'); + sbuf.append(i < 0 ? cname : cname.substring(i + 1)); + sbuf.append("["); + toString2(sbuf); + sbuf.append("]"); + return sbuf.toString(); + } + + protected void toString2(StringBuffer sbuf) { + sbuf.append("pos=").append(position).append(", len=") + .append(length).append(", in=").append(incoming) + .append(", exit{"); + if (exit != null) { + for (int i = 0; i < exit.length; i++) + sbuf.append(exit[i].position).append(","); + } + + sbuf.append("}, {"); + Catch th = toCatch; + while (th != null) { + sbuf.append("(").append(th.body.position).append(", ") + .append(th.typeIndex).append("), "); + th = th.next; + } + + sbuf.append("}"); + } + + /** + * A Mark indicates the position of a branch instruction + * or a branch target. + */ + static class Mark implements Comparable { + int position; + BasicBlock block; + BasicBlock[] jump; + boolean alwaysJmp; // true if an unconditional branch. + int size; // 0 unless the mark indicates RETURN etc. + Catch catcher; + + Mark(int p) { + position = p; + block = null; + jump = null; + alwaysJmp = false; + size = 0; + catcher = null; + } + + public int compareTo(Object obj) { + if (obj instanceof Mark) { + int pos = ((Mark)obj).position; + return position - pos; + } + + return -1; + } + + void setJump(BasicBlock[] bb, int s, boolean always) { + jump = bb; + size = s; + alwaysJmp = always; + } + } + + public static class Maker { + /* Override these two methods if a subclass of BasicBlock must be + * instantiated. + */ + protected BasicBlock makeBlock(int pos) { + return new BasicBlock(pos); + } + + protected BasicBlock[] makeArray(int size) { + return new BasicBlock[size]; + } + + private BasicBlock[] makeArray(BasicBlock b) { + BasicBlock[] array = makeArray(1); + array[0] = b; + return array; + } + + private BasicBlock[] makeArray(BasicBlock b1, BasicBlock b2) { + BasicBlock[] array = makeArray(2); + array[0] = b1; + array[1] = b2; + return array; + } + + public BasicBlock[] make(MethodInfo minfo) throws BadBytecode { + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca == null) + return null; + + CodeIterator ci = ca.iterator(); + return make(ci, 0, ci.getCodeLength(), ca.getExceptionTable()); + } + + public BasicBlock[] make(CodeIterator ci, int begin, int end, + ExceptionTable et) + throws BadBytecode + { + HashMap marks = makeMarks(ci, begin, end, et); + BasicBlock[] bb = makeBlocks(marks); + addCatchers(bb, et); + return bb; + } + + /* Branch target + */ + private Mark makeMark(HashMap table, int pos) { + return makeMark0(table, pos, true, true); + } + + /* Branch instruction. + * size > 0 + */ + private Mark makeMark(HashMap table, int pos, BasicBlock[] jump, + int size, boolean always) { + Mark m = makeMark0(table, pos, false, false); + m.setJump(jump, size, always); + return m; + } + + private Mark makeMark0(HashMap table, int pos, + boolean isBlockBegin, boolean isTarget) { + Integer p = new Integer(pos); + Mark m = (Mark)table.get(p); + if (m == null) { + m = new Mark(pos); + table.put(p, m); + } + + if (isBlockBegin) { + if (m.block == null) + m.block = makeBlock(pos); + + if (isTarget) + m.block.incoming++; + } + + return m; + } + + private HashMap makeMarks(CodeIterator ci, int begin, int end, + ExceptionTable et) + throws BadBytecode + { + ci.begin(); + ci.move(begin); + HashMap marks = new HashMap(); + while (ci.hasNext()) { + int index = ci.next(); + if (index >= end) + break; + + int op = ci.byteAt(index); + if ((Opcode.IFEQ <= op && op <= Opcode.IF_ACMPNE) + || op == Opcode.IFNULL || op == Opcode.IFNONNULL) { + Mark to = makeMark(marks, index + ci.s16bitAt(index + 1)); + Mark next = makeMark(marks, index + 3); + makeMark(marks, index, makeArray(to.block, next.block), 3, false); + } + else if (Opcode.GOTO <= op && op <= Opcode.LOOKUPSWITCH) + switch (op) { + case Opcode.GOTO : + makeGoto(marks, index, index + ci.s16bitAt(index + 1), 3); + break; + case Opcode.JSR : + makeJsr(marks, index, index + ci.s16bitAt(index + 1), 3); + break; + case Opcode.RET : + makeMark(marks, index, null, 2, true); + break; + case Opcode.TABLESWITCH : { + int pos = (index & ~3) + 4; + int low = ci.s32bitAt(pos + 4); + int high = ci.s32bitAt(pos + 8); + int ncases = high - low + 1; + BasicBlock[] to = makeArray(ncases + 1); + to[0] = makeMark(marks, index + ci.s32bitAt(pos)).block; // default branch target + int p = pos + 12; + int n = p + ncases * 4; + int k = 1; + while (p < n) { + to[k++] = makeMark(marks, index + ci.s32bitAt(p)).block; + p += 4; + } + makeMark(marks, index, to, n - index, true); + break; } + case Opcode.LOOKUPSWITCH : { + int pos = (index & ~3) + 4; + int ncases = ci.s32bitAt(pos + 4); + BasicBlock[] to = makeArray(ncases + 1); + to[0] = makeMark(marks, index + ci.s32bitAt(pos)).block; // default branch target + int p = pos + 8 + 4; + int n = p + ncases * 8 - 4; + int k = 1; + while (p < n) { + to[k++] = makeMark(marks, index + ci.s32bitAt(p)).block; + p += 8; + } + makeMark(marks, index, to, n - index, true); + break; } + } + else if ((Opcode.IRETURN <= op && op <= Opcode.RETURN) || op == Opcode.ATHROW) + makeMark(marks, index, null, 1, true); + else if (op == Opcode.GOTO_W) + makeGoto(marks, index, index + ci.s32bitAt(index + 1), 5); + else if (op == Opcode.JSR_W) + makeJsr(marks, index, index + ci.s32bitAt(index + 1), 5); + else if (op == Opcode.WIDE && ci.byteAt(index + 1) == Opcode.RET) + makeMark(marks, index, null, 4, true); + } + + if (et != null) { + int i = et.size(); + while (--i >= 0) { + makeMark0(marks, et.startPc(i), true, false); + makeMark(marks, et.handlerPc(i)); + } + } + + return marks; + } + + private void makeGoto(HashMap marks, int pos, int target, int size) { + Mark to = makeMark(marks, target); + BasicBlock[] jumps = makeArray(to.block); + makeMark(marks, pos, jumps, size, true); + } + + /* + * We could ignore JSR since Java 7 or later does not allow it. + * See The JVM Spec. Sec. 4.10.2.5. + */ + protected void makeJsr(HashMap marks, int pos, int target, int size) throws BadBytecode { + /* + Mark to = makeMark(marks, target); + Mark next = makeMark(marks, pos + size); + BasicBlock[] jumps = makeArray(to.block, next.block); + makeMark(marks, pos, jumps, size, false); + */ + throw new JsrBytecode(); + } + + private BasicBlock[] makeBlocks(HashMap markTable) { + Mark[] marks = (Mark[])markTable.values() + .toArray(new Mark[markTable.size()]); + java.util.Arrays.sort(marks); + ArrayList blocks = new ArrayList(); + int i = 0; + BasicBlock prev; + if (marks.length > 0 && marks[0].position == 0 && marks[0].block != null) + prev = getBBlock(marks[i++]); + else + prev = makeBlock(0); + + blocks.add(prev); + while (i < marks.length) { + Mark m = marks[i++]; + BasicBlock bb = getBBlock(m); + if (bb == null) { + // the mark indicates a branch instruction + if (prev.length > 0) { + // the previous mark already has exits. + prev = makeBlock(prev.position + prev.length); + blocks.add(prev); + } + + prev.length = m.position + m.size - prev.position; + prev.exit = m.jump; + prev.stop = m.alwaysJmp; + } + else { + // the mark indicates a branch target + if (prev.length == 0) { + prev.length = m.position - prev.position; + bb.incoming++; + prev.exit = makeArray(bb); + } + else { + // the previous mark already has exits. + if (prev.position + prev.length < m.position) { + // dead code is found. + prev = makeBlock(prev.position + prev.length); + blocks.add(prev); + prev.length = m.position - prev.position; + // the incoming flow from dead code is not counted + // bb.incoming++; + prev.stop = true; // because the incoming flow is not counted. + prev.exit = makeArray(bb); + } + } + + blocks.add(bb); + prev = bb; + } + } + + return (BasicBlock[])blocks.toArray(makeArray(blocks.size())); + } + + private static BasicBlock getBBlock(Mark m) { + BasicBlock b = m.block; + if (b != null && m.size > 0) { + b.exit = m.jump; + b.length = m.size; + b.stop = m.alwaysJmp; + } + + return b; + } + + private void addCatchers(BasicBlock[] blocks, ExceptionTable et) + throws BadBytecode + { + if (et == null) + return; + + int i = et.size(); + while (--i >= 0) { + BasicBlock handler = find(blocks, et.handlerPc(i)); + int start = et.startPc(i); + int end = et.endPc(i); + int type = et.catchType(i); + handler.incoming--; + for (int k = 0; k < blocks.length; k++) { + BasicBlock bb = blocks[k]; + int iPos = bb.position; + if (start <= iPos && iPos < end) { + bb.toCatch = new Catch(handler, type, bb.toCatch); + handler.incoming++; + } + } + } + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java new file mode 100644 index 0000000..19f64d5 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java @@ -0,0 +1,606 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import java.util.ArrayList; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.*; + +/** + * Stack map maker. + */ +public class MapMaker extends Tracer { + /* + public static void main(String[] args) throws Exception { + boolean useMain2 = args[0].equals("0"); + if (useMain2 && args.length > 1) { + main2(args); + return; + } + + for (int i = 0; i < args.length; i++) + main1(args[i]); + } + + public static void main1(String className) throws Exception { + ClassPool cp = ClassPool.getDefault(); + //javassist.CtClass cc = cp.get(className); + javassist.CtClass cc = cp.makeClass(new java.io.FileInputStream(className)); + System.out.println(className); + ClassFile cf = cc.getClassFile(); + java.util.List minfos = cf.getMethods(); + for (int i = 0; i < minfos.size(); i++) { + MethodInfo minfo = (MethodInfo)minfos.get(i); + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca != null) + ca.setAttribute(make(cp, minfo)); + } + + cc.writeFile("tmp"); + } + + public static void main2(String[] args) throws Exception { + ClassPool cp = ClassPool.getDefault(); + //javassist.CtClass cc = cp.get(args[1]); + javassist.CtClass cc = cp.makeClass(new java.io.FileInputStream(args[1])); + MethodInfo minfo; + if (args[2].equals("_init_")) + minfo = cc.getDeclaredConstructors()[0].getMethodInfo(); + // minfo = cc.getClassInitializer().getMethodInfo(); + else + minfo = cc.getDeclaredMethod(args[2]).getMethodInfo(); + + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca == null) { + System.out.println("abstarct method"); + return; + } + + TypedBlock[] blocks = TypedBlock.makeBlocks(minfo, ca, false); + MapMaker mm = new MapMaker(cp, minfo, ca); + mm.make(blocks, ca.getCode()); + for (int i = 0; i < blocks.length; i++) + System.out.println(blocks[i]); + } + */ + + /** + * Computes the stack map table of the given method and returns it. + * It returns null if the given method does not have to have a + * stack map table or it includes JSR. + */ + public static StackMapTable make(ClassPool classes, MethodInfo minfo) + throws BadBytecode + { + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca == null) + return null; + + TypedBlock[] blocks; + try { + blocks = TypedBlock.makeBlocks(minfo, ca, true); + } + catch (BasicBlock.JsrBytecode e) { + return null; + } + + if (blocks == null) + return null; + + MapMaker mm = new MapMaker(classes, minfo, ca); + try { + mm.make(blocks, ca.getCode()); + } + catch (BadBytecode bb) { + throw new BadBytecode(minfo, bb); + } + + return mm.toStackMap(blocks); + } + + /** + * Computes the stack map table for J2ME. + * It returns null if the given method does not have to have a + * stack map table or it includes JSR. + */ + public static StackMap make2(ClassPool classes, MethodInfo minfo) + throws BadBytecode + { + CodeAttribute ca = minfo.getCodeAttribute(); + if (ca == null) + return null; + + TypedBlock[] blocks; + try { + blocks = TypedBlock.makeBlocks(minfo, ca, true); + } + catch (BasicBlock.JsrBytecode e) { + return null; + } + + if (blocks == null) + return null; + + MapMaker mm = new MapMaker(classes, minfo, ca); + try { + mm.make(blocks, ca.getCode()); + } + catch (BadBytecode bb) { + throw new BadBytecode(minfo, bb); + } + return mm.toStackMap2(minfo.getConstPool(), blocks); + } + + public MapMaker(ClassPool classes, MethodInfo minfo, CodeAttribute ca) { + super(classes, minfo.getConstPool(), + ca.getMaxStack(), ca.getMaxLocals(), + TypedBlock.getRetType(minfo.getDescriptor())); + } + + protected MapMaker(MapMaker old) { super(old); } + + /** + * Runs an analyzer (Phase 1 and 2). + */ + void make(TypedBlock[] blocks, byte[] code) + throws BadBytecode + { + make(code, blocks[0]); + findDeadCatchers(code, blocks); + try { + fixTypes(code, blocks); + } catch (NotFoundException e) { + throw new BadBytecode("failed to resolve types", e); + } + } + + // Phase 1 + + private void make(byte[] code, TypedBlock tb) + throws BadBytecode + { + copyTypeData(tb.stackTop, tb.stackTypes, stackTypes); + stackTop = tb.stackTop; + copyTypeData(tb.localsTypes.length, tb.localsTypes, localsTypes); + + traceException(code, tb.toCatch); + + int pos = tb.position; + int end = pos + tb.length; + while (pos < end) { + pos += doOpcode(pos, code); + traceException(code, tb.toCatch); + } + + if (tb.exit != null) { + for (int i = 0; i < tb.exit.length; i++) { + TypedBlock e = (TypedBlock)tb.exit[i]; + if (e.alreadySet()) + mergeMap(e, true); + else { + recordStackMap(e); + MapMaker maker = new MapMaker(this); + maker.make(code, e); + } + } + } + } + + private void traceException(byte[] code, TypedBlock.Catch handler) + throws BadBytecode + { + while (handler != null) { + TypedBlock tb = (TypedBlock)handler.body; + if (tb.alreadySet()) { + mergeMap(tb, false); + if (tb.stackTop < 1) + throw new BadBytecode("bad catch clause: " + handler.typeIndex); + + tb.stackTypes[0] = merge(toExceptionType(handler.typeIndex), + tb.stackTypes[0]); + } + else { + recordStackMap(tb, handler.typeIndex); + MapMaker maker = new MapMaker(this); + maker.make(code, tb); + } + + handler = handler.next; + } + } + + private void mergeMap(TypedBlock dest, boolean mergeStack) throws BadBytecode { + int n = localsTypes.length; + for (int i = 0; i < n; i++) + dest.localsTypes[i] = merge(validateTypeData(localsTypes, n, i), + dest.localsTypes[i]); + + if (mergeStack) { + n = stackTop; + for (int i = 0; i < n; i++) + dest.stackTypes[i] = merge(stackTypes[i], dest.stackTypes[i]); + } + } + + private TypeData merge(TypeData src, TypeData target) throws BadBytecode { + if (src == target) + return target; + else if (target instanceof TypeData.ClassName + || target instanceof TypeData.BasicType) // a parameter + return target; + else if (target instanceof TypeData.AbsTypeVar) { + ((TypeData.AbsTypeVar)target).merge(src); + return target; + } + else + throw new RuntimeException("fatal: this should never happen"); + } + + private void recordStackMap(TypedBlock target) + throws BadBytecode + { + TypeData[] tStackTypes = TypeData.make(stackTypes.length); + int st = stackTop; + recordTypeData(st, stackTypes, tStackTypes); + recordStackMap0(target, st, tStackTypes); + } + + private void recordStackMap(TypedBlock target, int exceptionType) + throws BadBytecode + { + TypeData[] tStackTypes = TypeData.make(stackTypes.length); + tStackTypes[0] = toExceptionType(exceptionType).join(); + recordStackMap0(target, 1, tStackTypes); + } + + private TypeData.ClassName toExceptionType(int exceptionType) { + String type; + if (exceptionType == 0) // for finally clauses + type= "java.lang.Throwable"; + else + type = cpool.getClassInfo(exceptionType); + + return new TypeData.ClassName(type); + } + + private void recordStackMap0(TypedBlock target, int st, TypeData[] tStackTypes) + throws BadBytecode + { + int n = localsTypes.length; + TypeData[] tLocalsTypes = TypeData.make(n); + int k = recordTypeData(n, localsTypes, tLocalsTypes); + target.setStackMap(st, tStackTypes, k, tLocalsTypes); + } + + protected static int recordTypeData(int n, TypeData[] srcTypes, TypeData[] destTypes) { + int k = -1; + for (int i = 0; i < n; i++) { + TypeData t = validateTypeData(srcTypes, n, i); + destTypes[i] = t.join(); + if (t != TOP) + k = i + 1; // t might be long or double. + } + + return k + 1; + } + + protected static void copyTypeData(int n, TypeData[] srcTypes, TypeData[] destTypes) { + for (int i = 0; i < n; i++) + destTypes[i] = srcTypes[i]; + } + + private static TypeData validateTypeData(TypeData[] data, int length, int index) { + TypeData td = data[index]; + if (td.is2WordType() && index + 1 < length) + if (data[index + 1] != TOP) + return TOP; + + return td; + } + + // Phase 1.5 + + /* + * Javac may generate an exception handler that catches only the exception + * thrown within the handler itself. It is dead code. + * See javassist.JvstTest4.testJIRA195(). + */ + + private void findDeadCatchers(byte[] code, TypedBlock[] blocks) throws BadBytecode { + int len = blocks.length; + for (int i = 0; i < len; i++) { + TypedBlock block = blocks[i]; + if (!block.alreadySet()) { + fixDeadcode(code, block); + BasicBlock.Catch handler = block.toCatch; + if (handler != null) { + TypedBlock tb = (TypedBlock)handler.body; + if (!tb.alreadySet()) { + // tb is a handler that catches only the exceptions + // thrown from dead code. + recordStackMap(tb, handler.typeIndex); + fixDeadcode(code, tb); + tb.incoming = 1; + } + } + + } + } + } + + private void fixDeadcode(byte[] code, TypedBlock block) throws BadBytecode { + int pos = block.position; + int len = block.length - 3; + if (len < 0) { + // if the dead-code length is shorter than 3 bytes. + if (len == -1) + code[pos] = Bytecode.NOP; + + code[pos + block.length - 1] = (byte)Bytecode.ATHROW; + block.incoming = 1; + recordStackMap(block, 0); + return; + } + + // if block.incomping > 0, all the incoming edges are from + // other dead code blocks. So set block.incoming to 0. + block.incoming = 0; + + for (int k = 0; k < len; k++) + code[pos + k] = Bytecode.NOP; + + code[pos + len] = (byte)Bytecode.GOTO; + ByteArray.write16bit(-len, code, pos + len + 1); + } + + // Phase 2 + + /* + * This method first finds strongly connected components (SCCs) + * in a TypeData graph by Tarjan's algorithm. + * SCCs are TypeData nodes sharing the same type. + * Since SCCs are found in the topologically sorted order, + * their types are also fixed when they are found. + */ + private void fixTypes(byte[] code, TypedBlock[] blocks) throws NotFoundException, BadBytecode { + ArrayList preOrder = new ArrayList(); + int len = blocks.length; + int index = 0; + for (int i = 0; i < len; i++) { + TypedBlock block = blocks[i]; + if (block.alreadySet()) { // if block is not dead code + int n = block.localsTypes.length; + for (int j = 0; j < n; j++) + index = block.localsTypes[j].dfs(preOrder, index, classPool); + + n = block.stackTop; + for (int j = 0; j < n; j++) + index = block.stackTypes[j].dfs(preOrder, index, classPool); + } + } + } + + // Phase 3 + + public StackMapTable toStackMap(TypedBlock[] blocks) { + StackMapTable.Writer writer = new StackMapTable.Writer(32); + int n = blocks.length; + TypedBlock prev = blocks[0]; + int offsetDelta = prev.length; + if (prev.incoming > 0) { // the first instruction is a branch target. + writer.sameFrame(0); + offsetDelta--; + } + + for (int i = 1; i < n; i++) { + TypedBlock bb = blocks[i]; + if (isTarget(bb, blocks[i - 1])) { + bb.resetNumLocals(); + int diffL = stackMapDiff(prev.numLocals, prev.localsTypes, + bb.numLocals, bb.localsTypes); + toStackMapBody(writer, bb, diffL, offsetDelta, prev); + offsetDelta = bb.length - 1; + prev = bb; + } + else if (bb.incoming == 0) { + // dead code. + writer.sameFrame(offsetDelta); + offsetDelta = bb.length - 1; + prev = bb; + } + else + offsetDelta += bb.length; + } + + return writer.toStackMapTable(cpool); + } + + /** + * Returns true if cur is a branch target. + */ + private boolean isTarget(TypedBlock cur, TypedBlock prev) { + int in = cur.incoming; + if (in > 1) + return true; + else if (in < 1) + return false; + + return prev.stop; + } + + private void toStackMapBody(StackMapTable.Writer writer, TypedBlock bb, + int diffL, int offsetDelta, TypedBlock prev) { + // if diffL is -100, two TypeData arrays do not share + // any elements. + + int stackTop = bb.stackTop; + if (stackTop == 0) { + if (diffL == 0) { + writer.sameFrame(offsetDelta); + return; + } + else if (0 > diffL && diffL >= -3) { + writer.chopFrame(offsetDelta, -diffL); + return; + } + else if (0 < diffL && diffL <= 3) { + int[] data = new int[diffL]; + int[] tags = fillStackMap(bb.numLocals - prev.numLocals, + prev.numLocals, data, + bb.localsTypes); + writer.appendFrame(offsetDelta, tags, data); + return; + } + } + else if (stackTop == 1 && diffL == 0) { + TypeData td = bb.stackTypes[0]; + writer.sameLocals(offsetDelta, td.getTypeTag(), td.getTypeData(cpool)); + return; + } + else if (stackTop == 2 && diffL == 0) { + TypeData td = bb.stackTypes[0]; + if (td.is2WordType()) { + // bb.stackTypes[1] must be TOP. + writer.sameLocals(offsetDelta, td.getTypeTag(), td.getTypeData(cpool)); + return; + } + } + + int[] sdata = new int[stackTop]; + int[] stags = fillStackMap(stackTop, 0, sdata, bb.stackTypes); + int[] ldata = new int[bb.numLocals]; + int[] ltags = fillStackMap(bb.numLocals, 0, ldata, bb.localsTypes); + writer.fullFrame(offsetDelta, ltags, ldata, stags, sdata); + } + + private int[] fillStackMap(int num, int offset, int[] data, TypeData[] types) { + int realNum = diffSize(types, offset, offset + num); + ConstPool cp = cpool; + int[] tags = new int[realNum]; + int j = 0; + for (int i = 0; i < num; i++) { + TypeData td = types[offset + i]; + tags[j] = td.getTypeTag(); + data[j] = td.getTypeData(cp); + if (td.is2WordType()) + i++; + + j++; + } + + return tags; + } + + private static int stackMapDiff(int oldTdLen, TypeData[] oldTd, + int newTdLen, TypeData[] newTd) + { + int diff = newTdLen - oldTdLen; + int len; + if (diff > 0) + len = oldTdLen; + else + len = newTdLen; + + if (stackMapEq(oldTd, newTd, len)) + if (diff > 0) + return diffSize(newTd, len, newTdLen); + else + return -diffSize(oldTd, len, oldTdLen); + else + return -100; + } + + private static boolean stackMapEq(TypeData[] oldTd, TypeData[] newTd, int len) { + for (int i = 0; i < len; i++) { + if (!oldTd[i].eq(newTd[i])) + return false; + } + + return true; + } + + private static int diffSize(TypeData[] types, int offset, int len) { + int num = 0; + while (offset < len) { + TypeData td = types[offset++]; + num++; + if (td.is2WordType()) + offset++; + } + + return num; + } + + // Phase 3 for J2ME + + public StackMap toStackMap2(ConstPool cp, TypedBlock[] blocks) { + StackMap.Writer writer = new StackMap.Writer(); + int n = blocks.length; // should be > 0 + boolean[] effective = new boolean[n]; + TypedBlock prev = blocks[0]; + + // Is the first instruction a branch target? + effective[0] = prev.incoming > 0; + + int num = effective[0] ? 1 : 0; + for (int i = 1; i < n; i++) { + TypedBlock bb = blocks[i]; + if (effective[i] = isTarget(bb, blocks[i - 1])) { + bb.resetNumLocals(); + prev = bb; + num++; + } + } + + if (num == 0) + return null; + + writer.write16bit(num); + for (int i = 0; i < n; i++) + if (effective[i]) + writeStackFrame(writer, cp, blocks[i].position, blocks[i]); + + return writer.toStackMap(cp); + } + + private void writeStackFrame(StackMap.Writer writer, ConstPool cp, int offset, TypedBlock tb) { + writer.write16bit(offset); + writeVerifyTypeInfo(writer, cp, tb.localsTypes, tb.numLocals); + writeVerifyTypeInfo(writer, cp, tb.stackTypes, tb.stackTop); + } + + private void writeVerifyTypeInfo(StackMap.Writer writer, ConstPool cp, TypeData[] types, int num) { + int numDWord = 0; + for (int i = 0; i < num; i++) { + TypeData td = types[i]; + if (td != null && td.is2WordType()) { + numDWord++; + i++; + } + } + + writer.write16bit(num - numDWord); + for (int i = 0; i < num; i++) { + TypeData td = types[i]; + writer.writeVerifyTypeInfo(td.getTypeTag(), td.getTypeData(cp)); + if (td.is2WordType()) + i++; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java new file mode 100644 index 0000000..caef5c9 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java @@ -0,0 +1,933 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import com.wenshuo.agent.javassist.bytecode.ByteArray; +import com.wenshuo.agent.javassist.bytecode.Opcode; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.ClassPool; + +/* + * A class for performing abstract interpretation. + * See also MapMaker class. + */ + +public abstract class Tracer implements TypeTag { + protected ClassPool classPool; + protected ConstPool cpool; + protected String returnType; // used as the type of ARETURN + + protected int stackTop; + protected TypeData[] stackTypes; + protected TypeData[] localsTypes; + + public Tracer(ClassPool classes, ConstPool cp, int maxStack, int maxLocals, + String retType) { + classPool = classes; + cpool = cp; + returnType = retType; + stackTop = 0; + stackTypes = TypeData.make(maxStack); + localsTypes = TypeData.make(maxLocals); + } + + public Tracer(Tracer t) { + classPool = t.classPool; + cpool = t.cpool; + returnType = t.returnType; + stackTop = t.stackTop; + stackTypes = TypeData.make(t.stackTypes.length); + localsTypes = TypeData.make(t.localsTypes.length); + } + + /** + * Does abstract interpretation on the given bytecode instruction. + * It records whether or not a local variable (i.e. register) is accessed. + * If the instruction requires that a local variable or + * a stack element has a more specific type, this method updates the + * type of it. + * + * @param pos the position of the instruction. + * @return the size of the instruction at POS. + */ + protected int doOpcode(int pos, byte[] code) throws BadBytecode { + try { + int op = code[pos] & 0xff; + if (op < 96) + if (op < 54) + return doOpcode0_53(pos, code, op); + else + return doOpcode54_95(pos, code, op); + else + if (op < 148) + return doOpcode96_147(pos, code, op); + else + return doOpcode148_201(pos, code, op); + } + catch (ArrayIndexOutOfBoundsException e) { + throw new BadBytecode("inconsistent stack height " + e.getMessage(), e); + } + } + + protected void visitBranch(int pos, byte[] code, int offset) throws BadBytecode {} + protected void visitGoto(int pos, byte[] code, int offset) throws BadBytecode {} + protected void visitReturn(int pos, byte[] code) throws BadBytecode {} + protected void visitThrow(int pos, byte[] code) throws BadBytecode {} + + /** + * @param pos the position of TABLESWITCH + * @param code bytecode + * @param n the number of case labels + * @param offsetPos the position of the branch-target table. + * @param defaultOffset the offset to the default branch target. + */ + protected void visitTableSwitch(int pos, byte[] code, int n, + int offsetPos, int defaultOffset) throws BadBytecode {} + + /** + * @param pos the position of LOOKUPSWITCH + * @param code bytecode + * @param n the number of case labels + * @param pairsPos the position of the table of pairs of a value and a branch target. + * @param defaultOffset the offset to the default branch target. + */ + protected void visitLookupSwitch(int pos, byte[] code, int n, + int pairsPos, int defaultOffset) throws BadBytecode {} + + /** + * Invoked when the visited instruction is jsr. + * Java6 or later does not allow using RET. + */ + protected void visitJSR(int pos, byte[] code) throws BadBytecode { + /* Since JSR pushes a return address onto the operand stack, + * the stack map at the entry point of a subroutine is + * stackTypes resulting after executing the following code: + * + * stackTypes[stackTop++] = TOP; + */ + } + + /** + * Invoked when the visited instruction is ret or wide ret. + * Java6 or later does not allow using RET. + */ + protected void visitRET(int pos, byte[] code) throws BadBytecode {} + + private int doOpcode0_53(int pos, byte[] code, int op) throws BadBytecode { + int reg; + TypeData[] stackTypes = this.stackTypes; + switch (op) { + case Opcode.NOP : + break; + case Opcode.ACONST_NULL : + stackTypes[stackTop++] = new TypeData.NullType(); + break; + case Opcode.ICONST_M1 : + case Opcode.ICONST_0 : + case Opcode.ICONST_1 : + case Opcode.ICONST_2 : + case Opcode.ICONST_3 : + case Opcode.ICONST_4 : + case Opcode.ICONST_5 : + stackTypes[stackTop++] = INTEGER; + break; + case Opcode.LCONST_0 : + case Opcode.LCONST_1 : + stackTypes[stackTop++] = LONG; + stackTypes[stackTop++] = TOP; + break; + case Opcode.FCONST_0 : + case Opcode.FCONST_1 : + case Opcode.FCONST_2 : + stackTypes[stackTop++] = FLOAT; + break; + case Opcode.DCONST_0 : + case Opcode.DCONST_1 : + stackTypes[stackTop++] = DOUBLE; + stackTypes[stackTop++] = TOP; + break; + case Opcode.BIPUSH : + case Opcode.SIPUSH : + stackTypes[stackTop++] = INTEGER; + return op == Opcode.SIPUSH ? 3 : 2; + case Opcode.LDC : + doLDC(code[pos + 1] & 0xff); + return 2; + case Opcode.LDC_W : + case Opcode.LDC2_W : + doLDC(ByteArray.readU16bit(code, pos + 1)); + return 3; + case Opcode.ILOAD : + return doXLOAD(INTEGER, code, pos); + case Opcode.LLOAD : + return doXLOAD(LONG, code, pos); + case Opcode.FLOAD : + return doXLOAD(FLOAT, code, pos); + case Opcode.DLOAD : + return doXLOAD(DOUBLE, code, pos); + case Opcode.ALOAD : + return doALOAD(code[pos + 1] & 0xff); + case Opcode.ILOAD_0 : + case Opcode.ILOAD_1 : + case Opcode.ILOAD_2 : + case Opcode.ILOAD_3 : + stackTypes[stackTop++] = INTEGER; + break; + case Opcode.LLOAD_0 : + case Opcode.LLOAD_1 : + case Opcode.LLOAD_2 : + case Opcode.LLOAD_3 : + stackTypes[stackTop++] = LONG; + stackTypes[stackTop++] = TOP; + break; + case Opcode.FLOAD_0 : + case Opcode.FLOAD_1 : + case Opcode.FLOAD_2 : + case Opcode.FLOAD_3 : + stackTypes[stackTop++] = FLOAT; + break; + case Opcode.DLOAD_0 : + case Opcode.DLOAD_1 : + case Opcode.DLOAD_2 : + case Opcode.DLOAD_3 : + stackTypes[stackTop++] = DOUBLE; + stackTypes[stackTop++] = TOP; + break; + case Opcode.ALOAD_0 : + case Opcode.ALOAD_1 : + case Opcode.ALOAD_2 : + case Opcode.ALOAD_3 : + reg = op - Opcode.ALOAD_0; + stackTypes[stackTop++] = localsTypes[reg]; + break; + case Opcode.IALOAD : + stackTypes[--stackTop - 1] = INTEGER; + break; + case Opcode.LALOAD : + stackTypes[stackTop - 2] = LONG; + stackTypes[stackTop - 1] = TOP; + break; + case Opcode.FALOAD : + stackTypes[--stackTop - 1] = FLOAT; + break; + case Opcode.DALOAD : + stackTypes[stackTop - 2] = DOUBLE; + stackTypes[stackTop - 1] = TOP; + break; + case Opcode.AALOAD : { + int s = --stackTop - 1; + TypeData data = stackTypes[s]; + stackTypes[s] = TypeData.ArrayElement.make(data); + break; } + case Opcode.BALOAD : + case Opcode.CALOAD : + case Opcode.SALOAD : + stackTypes[--stackTop - 1] = INTEGER; + break; + default : + throw new RuntimeException("fatal"); + } + + return 1; + } + + private void doLDC(int index) { + TypeData[] stackTypes = this.stackTypes; + int tag = cpool.getTag(index); + if (tag == ConstPool.CONST_String) + stackTypes[stackTop++] = new TypeData.ClassName("java.lang.String"); + else if (tag == ConstPool.CONST_Integer) + stackTypes[stackTop++] = INTEGER; + else if (tag == ConstPool.CONST_Float) + stackTypes[stackTop++] = FLOAT; + else if (tag == ConstPool.CONST_Long) { + stackTypes[stackTop++] = LONG; + stackTypes[stackTop++] = TOP; + } + else if (tag == ConstPool.CONST_Double) { + stackTypes[stackTop++] = DOUBLE; + stackTypes[stackTop++] = TOP; + } + else if (tag == ConstPool.CONST_Class) + stackTypes[stackTop++] = new TypeData.ClassName("java.lang.Class"); + else + throw new RuntimeException("bad LDC: " + tag); + } + + private int doXLOAD(TypeData type, byte[] code, int pos) { + int localVar = code[pos + 1] & 0xff; + return doXLOAD(localVar, type); + } + + private int doXLOAD(int localVar, TypeData type) { + stackTypes[stackTop++] = type; + if (type.is2WordType()) + stackTypes[stackTop++] = TOP; + + return 2; + } + + private int doALOAD(int localVar) { + stackTypes[stackTop++] = localsTypes[localVar]; + return 2; + } + + private int doOpcode54_95(int pos, byte[] code, int op) throws BadBytecode { + switch (op) { + case Opcode.ISTORE : + return doXSTORE(pos, code, INTEGER); + case Opcode.LSTORE : + return doXSTORE(pos, code, LONG); + case Opcode.FSTORE : + return doXSTORE(pos, code, FLOAT); + case Opcode.DSTORE : + return doXSTORE(pos, code, DOUBLE); + case Opcode.ASTORE : + return doASTORE(code[pos + 1] & 0xff); + case Opcode.ISTORE_0 : + case Opcode.ISTORE_1 : + case Opcode.ISTORE_2 : + case Opcode.ISTORE_3 : + { int var = op - Opcode.ISTORE_0; + localsTypes[var] = INTEGER; + stackTop--; } + break; + case Opcode.LSTORE_0 : + case Opcode.LSTORE_1 : + case Opcode.LSTORE_2 : + case Opcode.LSTORE_3 : + { int var = op - Opcode.LSTORE_0; + localsTypes[var] = LONG; + localsTypes[var + 1] = TOP; + stackTop -= 2; } + break; + case Opcode.FSTORE_0 : + case Opcode.FSTORE_1 : + case Opcode.FSTORE_2 : + case Opcode.FSTORE_3 : + { int var = op - Opcode.FSTORE_0; + localsTypes[var] = FLOAT; + stackTop--; } + break; + case Opcode.DSTORE_0 : + case Opcode.DSTORE_1 : + case Opcode.DSTORE_2 : + case Opcode.DSTORE_3 : + { int var = op - Opcode.DSTORE_0; + localsTypes[var] = DOUBLE; + localsTypes[var + 1] = TOP; + stackTop -= 2; } + break; + case Opcode.ASTORE_0 : + case Opcode.ASTORE_1 : + case Opcode.ASTORE_2 : + case Opcode.ASTORE_3 : + { int var = op - Opcode.ASTORE_0; + doASTORE(var); + break; } + case Opcode.IASTORE : + case Opcode.LASTORE : + case Opcode.FASTORE : + case Opcode.DASTORE : + stackTop -= (op == Opcode.LASTORE || op == Opcode.DASTORE) ? 4 : 3; + break; + case Opcode.AASTORE : + TypeData.ArrayElement.aastore(stackTypes[stackTop - 3], + stackTypes[stackTop - 1], + classPool); + stackTop -= 3; + break; + case Opcode.BASTORE : + case Opcode.CASTORE : + case Opcode.SASTORE : + stackTop -= 3; + break; + case Opcode.POP : + stackTop--; + break; + case Opcode.POP2 : + stackTop -= 2; + break; + case Opcode.DUP : { + int sp = stackTop; + stackTypes[sp] = stackTypes[sp - 1]; + stackTop = sp + 1; + break; } + case Opcode.DUP_X1 : + case Opcode.DUP_X2 : { + int len = op - Opcode.DUP_X1 + 2; + doDUP_XX(1, len); + int sp = stackTop; + stackTypes[sp - len] = stackTypes[sp]; + stackTop = sp + 1; + break; } + case Opcode.DUP2 : + doDUP_XX(2, 2); + stackTop += 2; + break; + case Opcode.DUP2_X1 : + case Opcode.DUP2_X2 : { + int len = op - Opcode.DUP2_X1 + 3; + doDUP_XX(2, len); + int sp = stackTop; + stackTypes[sp - len] = stackTypes[sp]; + stackTypes[sp - len + 1] = stackTypes[sp + 1]; + stackTop = sp + 2; + break; } + case Opcode.SWAP : { + int sp = stackTop - 1; + TypeData t = stackTypes[sp]; + stackTypes[sp] = stackTypes[sp - 1]; + stackTypes[sp - 1] = t; + break; } + default : + throw new RuntimeException("fatal"); + } + + return 1; + } + + private int doXSTORE(int pos, byte[] code, TypeData type) { + int index = code[pos + 1] & 0xff; + return doXSTORE(index, type); + } + + private int doXSTORE(int index, TypeData type) { + stackTop--; + localsTypes[index] = type; + if (type.is2WordType()) { + stackTop--; + localsTypes[index + 1] = TOP; + } + + return 2; + } + + private int doASTORE(int index) { + stackTop--; + // implicit upcast might be done. + localsTypes[index] = stackTypes[stackTop]; + return 2; + } + + private void doDUP_XX(int delta, int len) { + TypeData types[] = stackTypes; + int sp = stackTop - 1; + int end = sp - len; + while (sp > end) { + types[sp + delta] = types[sp]; + sp--; + } + } + + private int doOpcode96_147(int pos, byte[] code, int op) { + if (op <= Opcode.LXOR) { // IADD...LXOR + stackTop += Opcode.STACK_GROW[op]; + return 1; + } + + switch (op) { + case Opcode.IINC : + // this does not call writeLocal(). + return 3; + case Opcode.I2L : + stackTypes[stackTop - 1] = LONG; + stackTypes[stackTop] = TOP; + stackTop++; + break; + case Opcode.I2F : + stackTypes[stackTop - 1] = FLOAT; + break; + case Opcode.I2D : + stackTypes[stackTop - 1] = DOUBLE; + stackTypes[stackTop] = TOP; + stackTop++; + break; + case Opcode.L2I : + stackTypes[--stackTop - 1] = INTEGER; + break; + case Opcode.L2F : + stackTypes[--stackTop - 1] = FLOAT; + break; + case Opcode.L2D : + stackTypes[stackTop - 2] = DOUBLE; + break; + case Opcode.F2I : + stackTypes[stackTop - 1] = INTEGER; + break; + case Opcode.F2L : + stackTypes[stackTop - 1] = LONG; + stackTypes[stackTop] = TOP; + stackTop++; + break; + case Opcode.F2D : + stackTypes[stackTop - 1] = DOUBLE; + stackTypes[stackTop] = TOP; + stackTop++; + break; + case Opcode.D2I : + stackTypes[--stackTop - 1] = INTEGER; + break; + case Opcode.D2L : + stackTypes[stackTop - 2] = LONG; + break; + case Opcode.D2F : + stackTypes[--stackTop - 1] = FLOAT; + break; + case Opcode.I2B : + case Opcode.I2C : + case Opcode.I2S : + break; + default : + throw new RuntimeException("fatal"); + } + + return 1; + } + + private int doOpcode148_201(int pos, byte[] code, int op) throws BadBytecode { + switch (op) { + case Opcode.LCMP : + stackTypes[stackTop - 4] = INTEGER; + stackTop -= 3; + break; + case Opcode.FCMPL : + case Opcode.FCMPG : + stackTypes[--stackTop - 1] = INTEGER; + break; + case Opcode.DCMPL : + case Opcode.DCMPG : + stackTypes[stackTop - 4] = INTEGER; + stackTop -= 3; + break; + case Opcode.IFEQ : + case Opcode.IFNE : + case Opcode.IFLT : + case Opcode.IFGE : + case Opcode.IFGT : + case Opcode.IFLE : + stackTop--; // branch + visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); + return 3; + case Opcode.IF_ICMPEQ : + case Opcode.IF_ICMPNE : + case Opcode.IF_ICMPLT : + case Opcode.IF_ICMPGE : + case Opcode.IF_ICMPGT : + case Opcode.IF_ICMPLE : + case Opcode.IF_ACMPEQ : + case Opcode.IF_ACMPNE : + stackTop -= 2; // branch + visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); + return 3; + case Opcode.GOTO : + visitGoto(pos, code, ByteArray.readS16bit(code, pos + 1)); + return 3; // branch + case Opcode.JSR : + visitJSR(pos, code); + return 3; // branch + case Opcode.RET : + visitRET(pos, code); + return 2; + case Opcode.TABLESWITCH : { + stackTop--; // branch + int pos2 = (pos & ~3) + 8; + int low = ByteArray.read32bit(code, pos2); + int high = ByteArray.read32bit(code, pos2 + 4); + int n = high - low + 1; + visitTableSwitch(pos, code, n, pos2 + 8, ByteArray.read32bit(code, pos2 - 4)); + return n * 4 + 16 - (pos & 3); } + case Opcode.LOOKUPSWITCH : { + stackTop--; // branch + int pos2 = (pos & ~3) + 8; + int n = ByteArray.read32bit(code, pos2); + visitLookupSwitch(pos, code, n, pos2 + 4, ByteArray.read32bit(code, pos2 - 4)); + return n * 8 + 12 - (pos & 3); } + case Opcode.IRETURN : + stackTop--; + visitReturn(pos, code); + break; + case Opcode.LRETURN : + stackTop -= 2; + visitReturn(pos, code); + break; + case Opcode.FRETURN : + stackTop--; + visitReturn(pos, code); + break; + case Opcode.DRETURN : + stackTop -= 2; + visitReturn(pos, code); + break; + case Opcode.ARETURN : + stackTypes[--stackTop].setType(returnType, classPool); + visitReturn(pos, code); + break; + case Opcode.RETURN : + visitReturn(pos, code); + break; + case Opcode.GETSTATIC : + return doGetField(pos, code, false); + case Opcode.PUTSTATIC : + return doPutField(pos, code, false); + case Opcode.GETFIELD : + return doGetField(pos, code, true); + case Opcode.PUTFIELD : + return doPutField(pos, code, true); + case Opcode.INVOKEVIRTUAL : + case Opcode.INVOKESPECIAL : + return doInvokeMethod(pos, code, true); + case Opcode.INVOKESTATIC : + return doInvokeMethod(pos, code, false); + case Opcode.INVOKEINTERFACE : + return doInvokeIntfMethod(pos, code); + case Opcode.INVOKEDYNAMIC : + return doInvokeDynamic(pos, code); + case Opcode.NEW : { + int i = ByteArray.readU16bit(code, pos + 1); + stackTypes[stackTop++] + = new TypeData.UninitData(pos, cpool.getClassInfo(i)); + return 3; } + case Opcode.NEWARRAY : + return doNEWARRAY(pos, code); + case Opcode.ANEWARRAY : { + int i = ByteArray.readU16bit(code, pos + 1); + String type = cpool.getClassInfo(i).replace('.', '/'); + if (type.charAt(0) == '[') + type = "[" + type; + else + type = "[L" + type + ";"; + + stackTypes[stackTop - 1] + = new TypeData.ClassName(type); + return 3; } + case Opcode.ARRAYLENGTH : + stackTypes[stackTop - 1].setType("[Ljava.lang.Object;", classPool); + stackTypes[stackTop - 1] = INTEGER; + break; + case Opcode.ATHROW : + stackTypes[--stackTop].setType("java.lang.Throwable", classPool); + visitThrow(pos, code); + break; + case Opcode.CHECKCAST : { + // TypeData.setType(stackTypes[stackTop - 1], "java.lang.Object", classPool); + int i = ByteArray.readU16bit(code, pos + 1); + String type = cpool.getClassInfo(i); + if (type.charAt(0) == '[') + type = type.replace('.', '/'); // getClassInfo() may return "[java.lang.Object;". + + stackTypes[stackTop - 1] = new TypeData.ClassName(type); + return 3; } + case Opcode.INSTANCEOF : + // TypeData.setType(stackTypes[stackTop - 1], "java.lang.Object", classPool); + stackTypes[stackTop - 1] = INTEGER; + return 3; + case Opcode.MONITORENTER : + case Opcode.MONITOREXIT : + stackTop--; + // TypeData.setType(stackTypes[stackTop], "java.lang.Object", classPool); + break; + case Opcode.WIDE : + return doWIDE(pos, code); + case Opcode.MULTIANEWARRAY : + return doMultiANewArray(pos, code); + case Opcode.IFNULL : + case Opcode.IFNONNULL : + stackTop--; // branch + visitBranch(pos, code, ByteArray.readS16bit(code, pos + 1)); + return 3; + case Opcode.GOTO_W : + visitGoto(pos, code, ByteArray.read32bit(code, pos + 1)); + return 5; // branch + case Opcode.JSR_W : + visitJSR(pos, code); + return 5; + } + return 1; + } + + private int doWIDE(int pos, byte[] code) throws BadBytecode { + int op = code[pos + 1] & 0xff; + switch (op) { + case Opcode.ILOAD : + doWIDE_XLOAD(pos, code, INTEGER); + break; + case Opcode.LLOAD : + doWIDE_XLOAD(pos, code, LONG); + break; + case Opcode.FLOAD : + doWIDE_XLOAD(pos, code, FLOAT); + break; + case Opcode.DLOAD : + doWIDE_XLOAD(pos, code, DOUBLE); + break; + case Opcode.ALOAD : { + int index = ByteArray.readU16bit(code, pos + 2); + doALOAD(index); + break; } + case Opcode.ISTORE : + doWIDE_STORE(pos, code, INTEGER); + break; + case Opcode.LSTORE : + doWIDE_STORE(pos, code, LONG); + break; + case Opcode.FSTORE : + doWIDE_STORE(pos, code, FLOAT); + break; + case Opcode.DSTORE : + doWIDE_STORE(pos, code, DOUBLE); + break; + case Opcode.ASTORE : { + int index = ByteArray.readU16bit(code, pos + 2); + doASTORE(index); + break; } + case Opcode.IINC : + // this does not call writeLocal(). + return 6; + case Opcode.RET : + visitRET(pos, code); + break; + default : + throw new RuntimeException("bad WIDE instruction: " + op); + } + + return 4; + } + + private void doWIDE_XLOAD(int pos, byte[] code, TypeData type) { + int index = ByteArray.readU16bit(code, pos + 2); + doXLOAD(index, type); + } + + private void doWIDE_STORE(int pos, byte[] code, TypeData type) { + int index = ByteArray.readU16bit(code, pos + 2); + doXSTORE(index, type); + } + + private int doPutField(int pos, byte[] code, boolean notStatic) throws BadBytecode { + int index = ByteArray.readU16bit(code, pos + 1); + String desc = cpool.getFieldrefType(index); + stackTop -= Descriptor.dataSize(desc); + char c = desc.charAt(0); + if (c == 'L') + stackTypes[stackTop].setType(getFieldClassName(desc, 0), classPool); + else if (c == '[') + stackTypes[stackTop].setType(desc, classPool); + + setFieldTarget(notStatic, index); + return 3; + } + + private int doGetField(int pos, byte[] code, boolean notStatic) throws BadBytecode { + int index = ByteArray.readU16bit(code, pos + 1); + setFieldTarget(notStatic, index); + String desc = cpool.getFieldrefType(index); + pushMemberType(desc); + return 3; + } + + private void setFieldTarget(boolean notStatic, int index) throws BadBytecode { + if (notStatic) { + String className = cpool.getFieldrefClassName(index); + stackTypes[--stackTop].setType(className, classPool); + } + } + + private int doNEWARRAY(int pos, byte[] code) { + int s = stackTop - 1; + String type; + switch (code[pos + 1] & 0xff) { + case Opcode.T_BOOLEAN : + type = "[Z"; + break; + case Opcode.T_CHAR : + type = "[C"; + break; + case Opcode.T_FLOAT : + type = "[F"; + break; + case Opcode.T_DOUBLE : + type = "[D"; + break; + case Opcode.T_BYTE : + type = "[B"; + break; + case Opcode.T_SHORT : + type = "[S"; + break; + case Opcode.T_INT : + type = "[I"; + break; + case Opcode.T_LONG : + type = "[J"; + break; + default : + throw new RuntimeException("bad newarray"); + } + + stackTypes[s] = new TypeData.ClassName(type); + return 2; + } + + private int doMultiANewArray(int pos, byte[] code) { + int i = ByteArray.readU16bit(code, pos + 1); + int dim = code[pos + 3] & 0xff; + stackTop -= dim - 1; + + String type = cpool.getClassInfo(i).replace('.', '/'); + stackTypes[stackTop - 1] = new TypeData.ClassName(type); + return 4; + } + + private int doInvokeMethod(int pos, byte[] code, boolean notStatic) throws BadBytecode { + int i = ByteArray.readU16bit(code, pos + 1); + String desc = cpool.getMethodrefType(i); + checkParamTypes(desc, 1); + if (notStatic) { + String className = cpool.getMethodrefClassName(i); + TypeData target = stackTypes[--stackTop]; + if (target instanceof TypeData.UninitTypeVar && target.isUninit()) + constructorCalled(target, ((TypeData.UninitTypeVar)target).offset()); + else if (target instanceof TypeData.UninitData) + constructorCalled(target, ((TypeData.UninitData)target).offset()); + + target.setType(className, classPool); + } + + pushMemberType(desc); + return 3; + } + + /* This is a constructor call on an uninitialized object. + * Sets flags of other references to that object. + * + * @param offset the offset where the object has been created. + */ + private void constructorCalled(TypeData target, int offset) { + target.constructorCalled(offset); + for (int i = 0; i < stackTop; i++) + stackTypes[i].constructorCalled(offset); + + for (int i = 0; i < localsTypes.length; i++) + localsTypes[i].constructorCalled(offset); + } + + private int doInvokeIntfMethod(int pos, byte[] code) throws BadBytecode { + int i = ByteArray.readU16bit(code, pos + 1); + String desc = cpool.getInterfaceMethodrefType(i); + checkParamTypes(desc, 1); + String className = cpool.getInterfaceMethodrefClassName(i); + stackTypes[--stackTop].setType(className, classPool); + pushMemberType(desc); + return 5; + } + + private int doInvokeDynamic(int pos, byte[] code) throws BadBytecode { + int i = ByteArray.readU16bit(code, pos + 1); + String desc = cpool.getInvokeDynamicType(i); + checkParamTypes(desc, 1); + + // assume CosntPool#REF_invokeStatic + /* TypeData target = stackTypes[--stackTop]; + if (target instanceof TypeData.UninitTypeVar && target.isUninit()) + constructorCalled((TypeData.UninitTypeVar)target); + */ + + pushMemberType(desc); + return 5; + } + + private void pushMemberType(String descriptor) { + int top = 0; + if (descriptor.charAt(0) == '(') { + top = descriptor.indexOf(')') + 1; + if (top < 1) + throw new IndexOutOfBoundsException("bad descriptor: " + + descriptor); + } + + TypeData[] types = stackTypes; + int index = stackTop; + switch (descriptor.charAt(top)) { + case '[' : + types[index] = new TypeData.ClassName(descriptor.substring(top)); + break; + case 'L' : + types[index] = new TypeData.ClassName(getFieldClassName(descriptor, top)); + break; + case 'J' : + types[index] = LONG; + types[index + 1] = TOP; + stackTop += 2; + return; + case 'F' : + types[index] = FLOAT; + break; + case 'D' : + types[index] = DOUBLE; + types[index + 1] = TOP; + stackTop += 2; + return; + case 'V' : + return; + default : // C, B, S, I, Z + types[index] = INTEGER; + break; + } + + stackTop++; + } + + private static String getFieldClassName(String desc, int index) { + return desc.substring(index + 1, desc.length() - 1).replace('/', '.'); + } + + private void checkParamTypes(String desc, int i) throws BadBytecode { + char c = desc.charAt(i); + if (c == ')') + return; + + int k = i; + boolean array = false; + while (c == '[') { + array = true; + c = desc.charAt(++k); + } + + if (c == 'L') { + k = desc.indexOf(';', k) + 1; + if (k <= 0) + throw new IndexOutOfBoundsException("bad descriptor"); + } + else + k++; + + checkParamTypes(desc, k); + if (!array && (c == 'J' || c == 'D')) + stackTop -= 2; + else + stackTop--; + + if (array) + stackTypes[stackTop].setType(desc.substring(i, k), classPool); + else if (c == 'L') + stackTypes[stackTop].setType(desc.substring(i + 1, k - 1).replace('/', '.'), + classPool); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java new file mode 100644 index 0000000..afab68c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java @@ -0,0 +1,785 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.StackMapTable; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import java.util.HashSet; +import java.util.Iterator; +import java.util.ArrayList; + +public abstract class TypeData { + /* Memo: + * array type is a subtype of Cloneable and Serializable + */ + + public static TypeData[] make(int size) { + TypeData[] array = new TypeData[size]; + for (int i = 0; i < size; i++) + array[i] = TypeTag.TOP; + + return array; + } + + protected TypeData() {} + + /** + * Sets the type name of this object type. If the given type name is + * a subclass of the current type name, then the given name becomes + * the name of this object type. + * + * @param className dot-separated name unless the type is an array type. + */ + private static void setType(TypeData td, String className, ClassPool cp) throws BadBytecode { + td.setType(className, cp); + } + + public abstract int getTypeTag(); + public abstract int getTypeData(ConstPool cp); + + public TypeData join() { return new TypeVar(this); } + + /** + * If the type is a basic type, this method normalizes the type + * and returns a BasicType object. Otherwise, it returns null. + */ + public abstract BasicType isBasicType(); + + public abstract boolean is2WordType(); + + /** + * Returns false if getName() returns a valid type name. + */ + public boolean isNullType() { return false; } + + public boolean isUninit() { return false; } + + public abstract boolean eq(TypeData d); + + public abstract String getName(); + public abstract void setType(String s, ClassPool cp) throws BadBytecode; + + // depth-first search + public int dfs(ArrayList order, int index, ClassPool cp) + throws NotFoundException + { + return index; + } + + /** + * Returns this if it is a TypeVar or a TypeVar that this + * type depends on. Otherwise, this method returns null. + * It is used by dfs(). + */ + protected TypeVar toTypeVar() { return null; } + + // see UninitTypeVar and UninitData + public void constructorCalled(int offset) {} + + /** + * Primitive types. + */ + protected static class BasicType extends TypeData { + private String name; + private int typeTag; + + public BasicType(String type, int tag) { + name = type; + typeTag = tag; + } + + public int getTypeTag() { return typeTag; } + public int getTypeData(ConstPool cp) { return 0; } + + public TypeData join() { + if (this == TypeTag.TOP) + return this; + else + return super.join(); + } + + public BasicType isBasicType() { return this; } + + public boolean is2WordType() { + return typeTag == StackMapTable.LONG + || typeTag == StackMapTable.DOUBLE; + } + + public boolean eq(TypeData d) { return this == d; } + + public String getName() { + return name; + } + + public void setType(String s, ClassPool cp) throws BadBytecode { + throw new BadBytecode("conflict: " + name + " and " + s); + } + + public String toString() { return name; } + } + + // a type variable + public static abstract class AbsTypeVar extends TypeData { + public AbsTypeVar() {} + public abstract void merge(TypeData t); + public int getTypeTag() { return StackMapTable.OBJECT; } + + public int getTypeData(ConstPool cp) { + return cp.addClassInfo(getName()); + } + + public boolean eq(TypeData d) { return getName().equals(d.getName()); } + } + + /* a type variable representing a class type or a basic type. + */ + public static class TypeVar extends AbsTypeVar { + protected ArrayList lowers; // lower bounds of this type. ArrayList + protected ArrayList usedBy; // reverse relations of lowers + protected ArrayList uppers; // upper bounds of this type. + protected String fixedType; + private boolean is2WordType; // cache + + public TypeVar(TypeData t) { + uppers = null; + lowers = new ArrayList(2); + usedBy = new ArrayList(2); + merge(t); + fixedType = null; + is2WordType = t.is2WordType(); + } + + public String getName() { + if (fixedType == null) + return ((TypeData)lowers.get(0)).getName(); + else + return fixedType; + } + + public BasicType isBasicType() { + if (fixedType == null) + return ((TypeData)lowers.get(0)).isBasicType(); + else + return null; + } + + public boolean is2WordType() { + if (fixedType == null) { + return is2WordType; + // return ((TypeData)lowers.get(0)).is2WordType(); + } + else + return false; + } + + public boolean isNullType() { + if (fixedType == null) + return ((TypeData)lowers.get(0)).isNullType(); + else + return false; + } + + public boolean isUninit() { + if (fixedType == null) + return ((TypeData)lowers.get(0)).isUninit(); + else + return false; + } + + public void merge(TypeData t) { + lowers.add(t); + if (t instanceof TypeVar) + ((TypeVar)t).usedBy.add(this); + } + + public int getTypeTag() { + /* If fixedType is null after calling dfs(), then this + type is NULL, Uninit, or a basic type. So call + getTypeTag() on the first element of lowers. */ + if (fixedType == null) + return ((TypeData)lowers.get(0)).getTypeTag(); + else + return super.getTypeTag(); + } + + public int getTypeData(ConstPool cp) { + if (fixedType == null) + return ((TypeData)lowers.get(0)).getTypeData(cp); + else + return super.getTypeData(cp); + } + + public void setType(String typeName, ClassPool cp) throws BadBytecode { + if (uppers == null) + uppers = new ArrayList(); + + uppers.add(typeName); + } + + protected TypeVar toTypeVar() { return this; } + + private int visited = 0; + private int smallest = 0; + private boolean inList = false; + + // depth-first serach + public int dfs(ArrayList preOrder, int index, ClassPool cp) throws NotFoundException { + if (visited > 0) + return index; // MapMaker.make() may call an already visited node. + + visited = smallest = ++index; + preOrder.add(this); + inList = true; + int n = lowers.size(); + for (int i = 0; i < n; i++) { + TypeVar child = ((TypeData)lowers.get(i)).toTypeVar(); + if (child != null) + if (child.visited == 0) { + index = child.dfs(preOrder, index, cp); + if (child.smallest < smallest) + smallest = child.smallest; + } + else if (child.inList) + if (child.visited < smallest) + smallest = child.visited; + } + + if (visited == smallest) { + ArrayList scc = new ArrayList(); // strongly connected component + TypeVar cv; + do { + cv = (TypeVar)preOrder.remove(preOrder.size() - 1); + cv.inList = false; + scc.add(cv); + } while (cv != this); + fixTypes(scc, cp); + } + + return index; + } + + private void fixTypes(ArrayList scc, ClassPool cp) throws NotFoundException { + HashSet lowersSet = new HashSet(); + boolean isBasicType = false; + TypeData kind = null; + int size = scc.size(); + for (int i = 0; i < size; i++) { + ArrayList tds = ((TypeVar)scc.get(i)).lowers; + int size2 = tds.size(); + for (int j = 0; j < size2; j++) { + TypeData d = (TypeData)tds.get(j); + BasicType bt = d.isBasicType(); + if (kind == null) { + if (bt == null) { + isBasicType = false; + kind = d; + /* If scc has only an UninitData, fixedType is kept null. + So lowerSet must be empty. If scc has not only an UninitData + but also another TypeData, an error must be thrown but this + error detection has not been implemented. */ + if (d.isUninit()) + break; + } + else { + isBasicType = true; + kind = bt; + } + } + else { + if ((bt == null && isBasicType) + || (bt != null && kind != bt)) { + isBasicType = true; + kind = TypeTag.TOP; + break; + } + } + + if (bt == null && !d.isNullType()) + lowersSet.add(d.getName()); + } + } + + if (isBasicType) { + for (int i = 0; i < size; i++) { + TypeVar cv = (TypeVar)scc.get(i); + cv.lowers.clear(); + cv.lowers.add(kind); + is2WordType = kind.is2WordType(); + } + } + else { + String typeName = fixTypes2(scc, lowersSet, cp); + for (int i = 0; i < size; i++) { + TypeVar cv = (TypeVar)scc.get(i); + cv.fixedType = typeName; + } + } + } + + private String fixTypes2(ArrayList scc, HashSet lowersSet, ClassPool cp) throws NotFoundException { + Iterator it = lowersSet.iterator(); + if (lowersSet.size() == 0) + return null; // only NullType + else if (lowersSet.size() == 1) + return (String)it.next(); + else { + CtClass cc = cp.get((String)it.next()); + while (it.hasNext()) + cc = commonSuperClassEx(cc, cp.get((String)it.next())); + + if (cc.getSuperclass() == null || isObjectArray(cc)) + cc = fixByUppers(scc, cp, new HashSet(), cc); + + if (cc.isArray()) + return Descriptor.toJvmName(cc); + else + return cc.getName(); + } + } + + private static boolean isObjectArray(CtClass cc) throws NotFoundException { + return cc.isArray() && cc.getComponentType().getSuperclass() == null; + } + + private CtClass fixByUppers(ArrayList users, ClassPool cp, HashSet visited, CtClass type) + throws NotFoundException + { + if (users == null) + return type; + + int size = users.size(); + for (int i = 0; i < size; i++) { + TypeVar t = (TypeVar)users.get(i); + if (!visited.add(t)) + return type; + + if (t.uppers != null) { + int s = t.uppers.size(); + for (int k = 0; k < s; k++) { + CtClass cc = cp.get((String)t.uppers.get(k)); + if (cc.subtypeOf(type)) + type = cc; + } + } + + type = fixByUppers(t.usedBy, cp, visited, type); + } + + return type; + } + } + + /** + * Finds the most specific common super class of the given classes + * by considering array types. + */ + public static CtClass commonSuperClassEx(CtClass one, CtClass two) throws NotFoundException { + if (one == two) + return one; + else if (one.isArray() && two.isArray()) { + CtClass ele1 = one.getComponentType(); + CtClass ele2 = two.getComponentType(); + CtClass element = commonSuperClassEx(ele1, ele2); + if (element == ele1) + return one; + else if (element == ele2) + return two; + else + return one.getClassPool().get(element == null ? "java.lang.Object" + : element.getName() + "[]"); + } + else if (one.isPrimitive() || two.isPrimitive()) + return null; // TOP + else if (one.isArray() || two.isArray()) // but !(one.isArray() && two.isArray()) + return one.getClassPool().get("java.lang.Object"); + else + return commonSuperClass(one, two); + } + + /** + * Finds the most specific common super class of the given classes. + * This method is a copy from javassist.bytecode.analysis.Type. + */ + public static CtClass commonSuperClass(CtClass one, CtClass two) throws NotFoundException { + CtClass deep = one; + CtClass shallow = two; + CtClass backupShallow = shallow; + CtClass backupDeep = deep; + + // Phase 1 - Find the deepest hierarchy, set deep and shallow correctly + for (;;) { + // In case we get lucky, and find a match early + if (eq(deep, shallow) && deep.getSuperclass() != null) + return deep; + + CtClass deepSuper = deep.getSuperclass(); + CtClass shallowSuper = shallow.getSuperclass(); + + if (shallowSuper == null) { + // right, now reset shallow + shallow = backupShallow; + break; + } + + if (deepSuper == null) { + // wrong, swap them, since deep is now useless, its our tmp before we swap it + deep = backupDeep; + backupDeep = backupShallow; + backupShallow = deep; + + deep = shallow; + shallow = backupShallow; + break; + } + + deep = deepSuper; + shallow = shallowSuper; + } + + // Phase 2 - Move deepBackup up by (deep end - deep) + for (;;) { + deep = deep.getSuperclass(); + if (deep == null) + break; + + backupDeep = backupDeep.getSuperclass(); + } + + deep = backupDeep; + + // Phase 3 - The hierarchy positions are now aligned + // The common super class is easy to find now + while (!eq(deep, shallow)) { + deep = deep.getSuperclass(); + shallow = shallow.getSuperclass(); + } + + return deep; + } + + static boolean eq(CtClass one, CtClass two) { + return one == two || (one != null && two != null && one.getName().equals(two.getName())); + } + + public static void aastore(TypeData array, TypeData value, ClassPool cp) throws BadBytecode { + if (array instanceof AbsTypeVar) + if (!value.isNullType()) + ((AbsTypeVar)array).merge(ArrayType.make(value)); + + if (value instanceof AbsTypeVar) + if (array instanceof AbsTypeVar) + ArrayElement.make(array); // should call value.setType() later. + else if (array instanceof ClassName) { + if (!array.isNullType()) { + String type = ArrayElement.typeName(array.getName()); + value.setType(type, cp); + } + } + else + throw new BadBytecode("bad AASTORE: " + array); + } + + /* A type variable representing an array type. + * It is a decorator of another type variable. + */ + public static class ArrayType extends AbsTypeVar { + private AbsTypeVar element; + + private ArrayType(AbsTypeVar elementType) { + element = elementType; + } + + static TypeData make(TypeData element) throws BadBytecode { + if (element instanceof ArrayElement) + return ((ArrayElement)element).arrayType(); + else if (element instanceof AbsTypeVar) + return new ArrayType((AbsTypeVar)element); + else if (element instanceof ClassName) + if (!element.isNullType()) + return new ClassName(typeName(element.getName())); + + throw new BadBytecode("bad AASTORE: " + element); + } + + public void merge(TypeData t) { + try { + if (!t.isNullType()) + element.merge(ArrayElement.make(t)); + } + catch (BadBytecode e) { + // never happens + throw new RuntimeException("fatal: " + e); + } + } + + public String getName() { + return typeName(element.getName()); + } + + public AbsTypeVar elementType() { return element; } + + public BasicType isBasicType() { return null; } + public boolean is2WordType() { return false; } + + /* elementType must be a class name. Basic type names + * are not allowed. + */ + public static String typeName(String elementType) { + if (elementType.charAt(0) == '[') + return "[" + elementType; + else + return "[L" + elementType.replace('.', '/') + ";"; + } + + public void setType(String s, ClassPool cp) throws BadBytecode { + element.setType(ArrayElement.typeName(s), cp); + } + + protected TypeVar toTypeVar() { return element.toTypeVar(); } + + public int dfs(ArrayList order, int index, ClassPool cp) throws NotFoundException { + return element.dfs(order, index, cp); + } + } + + /* A type variable representing an array-element type. + * It is a decorator of another type variable. + */ + public static class ArrayElement extends AbsTypeVar { + private AbsTypeVar array; + + private ArrayElement(AbsTypeVar a) { // a is never null + array = a; + } + + public static TypeData make(TypeData array) throws BadBytecode { + if (array instanceof ArrayType) + return ((ArrayType)array).elementType(); + else if (array instanceof AbsTypeVar) + return new ArrayElement((AbsTypeVar)array); + else if (array instanceof ClassName) + if (!array.isNullType()) + return new ClassName(typeName(array.getName())); + + throw new BadBytecode("bad AASTORE: " + array); + } + + public void merge(TypeData t) { + try { + if (!t.isNullType()) + array.merge(ArrayType.make(t)); + } + catch (BadBytecode e) { + // never happens + throw new RuntimeException("fatal: " + e); + } + } + + public String getName() { + return typeName(array.getName()); + } + + public AbsTypeVar arrayType() { return array; } + + /* arrayType must be a class name. Basic type names are + * not allowed. + */ + + public BasicType isBasicType() { return null; } + + public boolean is2WordType() { return false; } + + private static String typeName(String arrayType) { + if (arrayType.length() > 1 && arrayType.charAt(0) == '[') { + char c = arrayType.charAt(1); + if (c == 'L') + return arrayType.substring(2, arrayType.length() - 1).replace('/', '.'); + else if (c == '[') + return arrayType.substring(1); + } + + return "java.lang.Object"; // the array type may be NullType + } + + public void setType(String s, ClassPool cp) throws BadBytecode { + array.setType(ArrayType.typeName(s), cp); + } + + protected TypeVar toTypeVar() { return array.toTypeVar(); } + + public int dfs(ArrayList order, int index, ClassPool cp) throws NotFoundException { + return array.dfs(order, index, cp); + } + } + + public static class UninitTypeVar extends AbsTypeVar { + protected TypeData type; // UninitData or TOP + + public UninitTypeVar(UninitData t) { type = t; } + public int getTypeTag() { return type.getTypeTag(); } + public int getTypeData(ConstPool cp) { return type.getTypeData(cp); } + public BasicType isBasicType() { return type.isBasicType(); } + public boolean is2WordType() { return type.is2WordType(); } + public boolean isUninit() { return type.isUninit(); } + public boolean eq(TypeData d) { return type.eq(d); } + public String getName() { return type.getName(); } + + protected TypeVar toTypeVar() { return null; } + public TypeData join() { return type.join(); } + + public void setType(String s, ClassPool cp) throws BadBytecode { + type.setType(s, cp); + } + + public void merge(TypeData t) { + if (!t.eq(type)) + type = TypeTag.TOP; + } + + public void constructorCalled(int offset) { + type.constructorCalled(offset); + } + + public int offset() { + if (type instanceof UninitData) + return ((UninitData)type).offset; + else // if type == TypeTag.TOP + throw new RuntimeException("not available"); + } + } + + /** + * Type data for OBJECT. + */ + public static class ClassName extends TypeData { + private String name; // dot separated. + + public ClassName(String n) { + name = n; + } + + public String getName() { + return name; + } + + public BasicType isBasicType() { return null; } + + public boolean is2WordType() { return false; } + + public int getTypeTag() { return StackMapTable.OBJECT; } + + public int getTypeData(ConstPool cp) { + return cp.addClassInfo(getName()); + } + + public boolean eq(TypeData d) { return name.equals(d.getName()); } + + public void setType(String typeName, ClassPool cp) throws BadBytecode {} + } + + /** + * Type data for NULL or OBJECT. + * The types represented by the instances of this class are + * initially NULL but will be OBJECT. + */ + public static class NullType extends ClassName { + public NullType() { + super("null-type"); // type name + } + + public int getTypeTag() { + return StackMapTable.NULL; + } + + public boolean isNullType() { return true; } + public int getTypeData(ConstPool cp) { return 0; } + } + + /** + * Type data for UNINIT. + */ + public static class UninitData extends ClassName { + int offset; + boolean initialized; + + UninitData(int offset, String className) { + super(className); + this.offset = offset; + this.initialized = false; + } + + public UninitData copy() { return new UninitData(offset, getName()); } + + public int getTypeTag() { + return StackMapTable.UNINIT; + } + + public int getTypeData(ConstPool cp) { + return offset; + } + + public TypeData join() { + if (initialized) + return new TypeVar(new ClassName(getName())); + else + return new UninitTypeVar(copy()); + } + + public boolean isUninit() { return true; } + + public boolean eq(TypeData d) { + if (d instanceof UninitData) { + UninitData ud = (UninitData)d; + return offset == ud.offset && getName().equals(ud.getName()); + } + else + return false; + } + + public String toString() { return "uninit:" + getName() + "@" + offset; } + + public int offset() { return offset; } + + public void constructorCalled(int offset) { + if (offset == this.offset) + initialized = true; + } + } + + public static class UninitThis extends UninitData { + UninitThis(String className) { + super(-1, className); + } + + public UninitData copy() { return new UninitThis(getName()); } + + public int getTypeTag() { + return StackMapTable.THIS; + } + + public int getTypeData(ConstPool cp) { + return 0; + } + + public String toString() { return "uninit:this"; } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java new file mode 100644 index 0000000..89aa4e3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java @@ -0,0 +1,30 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import com.wenshuo.agent.javassist.bytecode.StackMapTable; + +public interface TypeTag { + String TOP_TYPE = "*top*"; + TypeData TOP = new TypeData.BasicType(TOP_TYPE, StackMapTable.TOP); + TypeData INTEGER = new TypeData.BasicType("int", StackMapTable.INTEGER); + TypeData FLOAT = new TypeData.BasicType("float", StackMapTable.FLOAT); + TypeData DOUBLE = new TypeData.BasicType("double", StackMapTable.DOUBLE); + TypeData LONG = new TypeData.BasicType("long", StackMapTable.LONG); + + // and NULL, THIS, OBJECT, UNINIT +} diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java new file mode 100644 index 0000000..631bfbd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java @@ -0,0 +1,234 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.bytecode.stackmap; + +import com.wenshuo.agent.javassist.bytecode.*; + +public class TypedBlock extends BasicBlock { + public int stackTop, numLocals; + // localsTypes is set to non-null when this block is first visited by a MapMaker. + // see alreadySet(). + public TypeData[] localsTypes; + public TypeData[] stackTypes; + + /** + * Divides the method body into basic blocks. + * The type information of the first block is initialized. + * + * @param optimize if it is true and the method does not include + * branches, this method returns null. + */ + public static TypedBlock[] makeBlocks(MethodInfo minfo, CodeAttribute ca, + boolean optimize) + throws BadBytecode + { + TypedBlock[] blocks = (TypedBlock[])new Maker().make(minfo); + if (optimize && blocks.length < 2) + if (blocks.length == 0 || blocks[0].incoming == 0) + return null; + + ConstPool pool = minfo.getConstPool(); + boolean isStatic = (minfo.getAccessFlags() & AccessFlag.STATIC) != 0; + blocks[0].initFirstBlock(ca.getMaxStack(), ca.getMaxLocals(), + pool.getClassName(), minfo.getDescriptor(), + isStatic, minfo.isConstructor()); + return blocks; + } + + protected TypedBlock(int pos) { + super(pos); + localsTypes = null; + } + + protected void toString2(StringBuffer sbuf) { + super.toString2(sbuf); + sbuf.append(",\n stack={"); + printTypes(sbuf, stackTop, stackTypes); + sbuf.append("}, locals={"); + printTypes(sbuf, numLocals, localsTypes); + sbuf.append('}'); + } + + private void printTypes(StringBuffer sbuf, int size, + TypeData[] types) { + if (types == null) + return; + + for (int i = 0; i < size; i++) { + if (i > 0) + sbuf.append(", "); + + TypeData td = types[i]; + sbuf.append(td == null ? "<>" : td.toString()); + } + } + + public boolean alreadySet() { + return localsTypes != null; + } + + public void setStackMap(int st, TypeData[] stack, int nl, TypeData[] locals) + throws BadBytecode + { + stackTop = st; + stackTypes = stack; + numLocals = nl; + localsTypes = locals; + } + + /* + * Computes the correct value of numLocals. + */ + public void resetNumLocals() { + if (localsTypes != null) { + int nl = localsTypes.length; + while (nl > 0 && localsTypes[nl - 1].isBasicType() == TypeTag.TOP) { + if (nl > 1) { + if (localsTypes[nl - 2].is2WordType()) + break; + } + + --nl; + } + + numLocals = nl; + } + } + + public static class Maker extends BasicBlock.Maker { + protected BasicBlock makeBlock(int pos) { + return new TypedBlock(pos); + } + + protected BasicBlock[] makeArray(int size) { + return new TypedBlock[size]; + } + } + + /** + * Initializes the first block by the given method descriptor. + * + * @param block the first basic block that this method initializes. + * @param className a dot-separated fully qualified class name. + * For example, javassist.bytecode.stackmap.BasicBlock. + * @param methodDesc method descriptor. + * @param isStatic true if the method is a static method. + * @param isConstructor true if the method is a constructor. + */ + void initFirstBlock(int maxStack, int maxLocals, String className, + String methodDesc, boolean isStatic, boolean isConstructor) + throws BadBytecode + { + if (methodDesc.charAt(0) != '(') + throw new BadBytecode("no method descriptor: " + methodDesc); + + stackTop = 0; + stackTypes = TypeData.make(maxStack); + TypeData[] locals = TypeData.make(maxLocals); + if (isConstructor) + locals[0] = new TypeData.UninitThis(className); + else if (!isStatic) + locals[0] = new TypeData.ClassName(className); + + int n = isStatic ? -1 : 0; + int i = 1; + try { + while ((i = descToTag(methodDesc, i, ++n, locals)) > 0) + if (locals[n].is2WordType()) + locals[++n] = TypeTag.TOP; + } + catch (StringIndexOutOfBoundsException e) { + throw new BadBytecode("bad method descriptor: " + + methodDesc); + } + + numLocals = n; + localsTypes = locals; + } + + private static int descToTag(String desc, int i, + int n, TypeData[] types) + throws BadBytecode + { + int i0 = i; + int arrayDim = 0; + char c = desc.charAt(i); + if (c == ')') + return 0; + + while (c == '[') { + ++arrayDim; + c = desc.charAt(++i); + } + + if (c == 'L') { + int i2 = desc.indexOf(';', ++i); + if (arrayDim > 0) + types[n] = new TypeData.ClassName(desc.substring(i0, ++i2)); + else + types[n] = new TypeData.ClassName(desc.substring(i0 + 1, ++i2 - 1) + .replace('/', '.')); + return i2; + } + else if (arrayDim > 0) { + types[n] = new TypeData.ClassName(desc.substring(i0, ++i)); + return i; + } + else { + TypeData t = toPrimitiveTag(c); + if (t == null) + throw new BadBytecode("bad method descriptor: " + desc); + + types[n] = t; + return i + 1; + } + } + + private static TypeData toPrimitiveTag(char c) { + switch (c) { + case 'Z' : + case 'C' : + case 'B' : + case 'S' : + case 'I' : + return TypeTag.INTEGER; + case 'J' : + return TypeTag.LONG; + case 'F' : + return TypeTag.FLOAT; + case 'D' : + return TypeTag.DOUBLE; + case 'V' : + default : + return null; + } + } + + public static String getRetType(String desc) { + int i = desc.indexOf(')'); + if (i < 0) + return "java.lang.Object"; + + char c = desc.charAt(i + 1); + if (c == '[') + return desc.substring(i + 1); + else if (c == 'L') + return desc.substring(i + 2, desc.length() - 1).replace('/', '.'); + else + return "java.lang.Object"; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java b/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java new file mode 100644 index 0000000..f35025f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java @@ -0,0 +1,260 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import java.util.HashMap; + +/** + * AccessorMaker maintains accessors to private members of an enclosing + * class. It is necessary for compiling a method in an inner class. + */ +public class AccessorMaker { + private CtClass clazz; + private int uniqueNumber; + private HashMap accessors; + + static final String lastParamType = "javassist.runtime.Inner"; + + public AccessorMaker(CtClass c) { + clazz = c; + uniqueNumber = 1; + accessors = new HashMap(); + } + + public String getConstructor(CtClass c, String desc, MethodInfo orig) + throws CompileError + { + String key = ":" + desc; + String consDesc = (String)accessors.get(key); + if (consDesc != null) + return consDesc; // already exists. + + consDesc = Descriptor.appendParameter(lastParamType, desc); + ClassFile cf = clazz.getClassFile(); // turn on the modified flag. + try { + ConstPool cp = cf.getConstPool(); + ClassPool pool = clazz.getClassPool(); + MethodInfo minfo + = new MethodInfo(cp, MethodInfo.nameInit, consDesc); + minfo.setAccessFlags(0); + minfo.addAttribute(new SyntheticAttribute(cp)); + ExceptionsAttribute ea = orig.getExceptionsAttribute(); + if (ea != null) + minfo.addAttribute(ea.copy(cp, null)); + + CtClass[] params = Descriptor.getParameterTypes(desc, pool); + Bytecode code = new Bytecode(cp); + code.addAload(0); + int regno = 1; + for (int i = 0; i < params.length; ++i) + regno += code.addLoad(regno, params[i]); + code.setMaxLocals(regno + 1); // the last parameter is added. + code.addInvokespecial(clazz, MethodInfo.nameInit, desc); + + code.addReturn(null); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + } + catch (CannotCompileException e) { + throw new CompileError(e); + } + catch (NotFoundException e) { + throw new CompileError(e); + } + + accessors.put(key, consDesc); + return consDesc; + } + + /** + * Returns the name of the method for accessing a private method. + * + * @param name the name of the private method. + * @param desc the descriptor of the private method. + * @param accDesc the descriptor of the accessor method. The first + * parameter type is clazz. + * If the private method is static, + * accDesc must be identical to desc. + * + * @param orig the method info of the private method. + * @return + */ + public String getMethodAccessor(String name, String desc, String accDesc, + MethodInfo orig) + throws CompileError + { + String key = name + ":" + desc; + String accName = (String)accessors.get(key); + if (accName != null) + return accName; // already exists. + + ClassFile cf = clazz.getClassFile(); // turn on the modified flag. + accName = findAccessorName(cf); + try { + ConstPool cp = cf.getConstPool(); + ClassPool pool = clazz.getClassPool(); + MethodInfo minfo + = new MethodInfo(cp, accName, accDesc); + minfo.setAccessFlags(AccessFlag.STATIC); + minfo.addAttribute(new SyntheticAttribute(cp)); + ExceptionsAttribute ea = orig.getExceptionsAttribute(); + if (ea != null) + minfo.addAttribute(ea.copy(cp, null)); + + CtClass[] params = Descriptor.getParameterTypes(accDesc, pool); + int regno = 0; + Bytecode code = new Bytecode(cp); + for (int i = 0; i < params.length; ++i) + regno += code.addLoad(regno, params[i]); + + code.setMaxLocals(regno); + if (desc == accDesc) + code.addInvokestatic(clazz, name, desc); + else + code.addInvokevirtual(clazz, name, desc); + + code.addReturn(Descriptor.getReturnType(desc, pool)); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + } + catch (CannotCompileException e) { + throw new CompileError(e); + } + catch (NotFoundException e) { + throw new CompileError(e); + } + + accessors.put(key, accName); + return accName; + } + + /** + * Returns the method_info representing the added getter. + */ + public MethodInfo getFieldGetter(FieldInfo finfo, boolean is_static) + throws CompileError + { + String fieldName = finfo.getName(); + String key = fieldName + ":getter"; + Object res = accessors.get(key); + if (res != null) + return (MethodInfo)res; // already exists. + + ClassFile cf = clazz.getClassFile(); // turn on the modified flag. + String accName = findAccessorName(cf); + try { + ConstPool cp = cf.getConstPool(); + ClassPool pool = clazz.getClassPool(); + String fieldType = finfo.getDescriptor(); + String accDesc; + if (is_static) + accDesc = "()" + fieldType; + else + accDesc = "(" + Descriptor.of(clazz) + ")" + fieldType; + + MethodInfo minfo = new MethodInfo(cp, accName, accDesc); + minfo.setAccessFlags(AccessFlag.STATIC); + minfo.addAttribute(new SyntheticAttribute(cp)); + Bytecode code = new Bytecode(cp); + if (is_static) { + code.addGetstatic(Bytecode.THIS, fieldName, fieldType); + } + else { + code.addAload(0); + code.addGetfield(Bytecode.THIS, fieldName, fieldType); + code.setMaxLocals(1); + } + + code.addReturn(Descriptor.toCtClass(fieldType, pool)); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + accessors.put(key, minfo); + return minfo; + } + catch (CannotCompileException e) { + throw new CompileError(e); + } + catch (NotFoundException e) { + throw new CompileError(e); + } + } + + /** + * Returns the method_info representing the added setter. + */ + public MethodInfo getFieldSetter(FieldInfo finfo, boolean is_static) + throws CompileError + { + String fieldName = finfo.getName(); + String key = fieldName + ":setter"; + Object res = accessors.get(key); + if (res != null) + return (MethodInfo)res; // already exists. + + ClassFile cf = clazz.getClassFile(); // turn on the modified flag. + String accName = findAccessorName(cf); + try { + ConstPool cp = cf.getConstPool(); + ClassPool pool = clazz.getClassPool(); + String fieldType = finfo.getDescriptor(); + String accDesc; + if (is_static) + accDesc = "(" + fieldType + ")V"; + else + accDesc = "(" + Descriptor.of(clazz) + fieldType + ")V"; + + MethodInfo minfo = new MethodInfo(cp, accName, accDesc); + minfo.setAccessFlags(AccessFlag.STATIC); + minfo.addAttribute(new SyntheticAttribute(cp)); + Bytecode code = new Bytecode(cp); + int reg; + if (is_static) { + reg = code.addLoad(0, Descriptor.toCtClass(fieldType, pool)); + code.addPutstatic(Bytecode.THIS, fieldName, fieldType); + } + else { + code.addAload(0); + reg = code.addLoad(1, Descriptor.toCtClass(fieldType, pool)) + + 1; + code.addPutfield(Bytecode.THIS, fieldName, fieldType); + } + + code.addReturn(null); + code.setMaxLocals(reg); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + accessors.put(key, minfo); + return minfo; + } + catch (CannotCompileException e) { + throw new CompileError(e); + } + catch (NotFoundException e) { + throw new CompileError(e); + } + } + + private String findAccessorName(ClassFile cf) { + String accName; + do { + accName = "access$" + uniqueNumber++; + } while (cf.getMethod(accName) != null); + return accName; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java b/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java new file mode 100644 index 0000000..3345abc --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java @@ -0,0 +1,1955 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import java.util.ArrayList; +import java.util.Arrays; +import com.wenshuo.agent.javassist.compiler.ast.*; +import com.wenshuo.agent.javassist.bytecode.*; + +/* The code generator is implemeted by three files: + * CodeGen.java, MemberCodeGen.java, and JvstCodeGen. + * I just wanted to split a big file into three smaller ones. + */ + +public abstract class CodeGen extends Visitor implements Opcode, TokenId { + static final String javaLangObject = "java.lang.Object"; + static final String jvmJavaLangObject = "java/lang/Object"; + + static final String javaLangString = "java.lang.String"; + static final String jvmJavaLangString = "java/lang/String"; + + protected Bytecode bytecode; + private int tempVar; + TypeChecker typeChecker; + + /** + * true if the last visited node is a return statement. + */ + protected boolean hasReturned; + + /** + * Must be true if compilation is for a static method. + */ + public boolean inStaticMethod; + + protected ArrayList breakList, continueList; + + /** + * doit() in ReturnHook is called from atReturn(). + */ + protected static abstract class ReturnHook { + ReturnHook next; + + /** + * Returns true if the generated code ends with return, + * throw, or goto. + */ + protected abstract boolean doit(Bytecode b, int opcode); + + protected ReturnHook(CodeGen gen) { + next = gen.returnHooks; + gen.returnHooks = this; + } + + protected void remove(CodeGen gen) { + gen.returnHooks = next; + } + } + + protected ReturnHook returnHooks; + + /* The following fields are used by atXXX() methods + * for returning the type of the compiled expression. + */ + protected int exprType; // VOID, NULL, CLASS, BOOLEAN, INT, ... + protected int arrayDim; + protected String className; // JVM-internal representation + + public CodeGen(Bytecode b) { + bytecode = b; + tempVar = -1; + typeChecker = null; + hasReturned = false; + inStaticMethod = false; + breakList = null; + continueList = null; + returnHooks = null; + } + + public void setTypeChecker(TypeChecker checker) { + typeChecker = checker; + } + + protected static void fatal() throws CompileError { + throw new CompileError("fatal"); + } + + public static boolean is2word(int type, int dim) { + return dim == 0 && (type == DOUBLE || type == LONG); + } + + public int getMaxLocals() { return bytecode.getMaxLocals(); } + + public void setMaxLocals(int n) { + bytecode.setMaxLocals(n); + } + + protected void incMaxLocals(int size) { + bytecode.incMaxLocals(size); + } + + /** + * Returns a local variable that single or double words can be + * stored in. + */ + protected int getTempVar() { + if (tempVar < 0) { + tempVar = getMaxLocals(); + incMaxLocals(2); + } + + return tempVar; + } + + protected int getLocalVar(Declarator d) { + int v = d.getLocalVar(); + if (v < 0) { + v = getMaxLocals(); // delayed variable allocation. + d.setLocalVar(v); + incMaxLocals(1); + } + + return v; + } + + /** + * Returns the JVM-internal representation of this class name. + */ + protected abstract String getThisName(); + + /** + * Returns the JVM-internal representation of this super class name. + */ + protected abstract String getSuperName() throws CompileError; + + /* Converts a class name into a JVM-internal representation. + * + * It may also expand a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected abstract String resolveClassName(ASTList name) + throws CompileError; + + /* Expands a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected abstract String resolveClassName(String jvmClassName) + throws CompileError; + + /** + * @param name the JVM-internal representation. + * name is not exapnded to java.lang.*. + */ + protected static String toJvmArrayName(String name, int dim) { + if (name == null) + return null; + + if (dim == 0) + return name; + else { + StringBuffer sbuf = new StringBuffer(); + int d = dim; + while (d-- > 0) + sbuf.append('['); + + sbuf.append('L'); + sbuf.append(name); + sbuf.append(';'); + + return sbuf.toString(); + } + } + + protected static String toJvmTypeName(int type, int dim) { + char c = 'I'; + switch(type) { + case BOOLEAN : + c = 'Z'; + break; + case BYTE : + c = 'B'; + break; + case CHAR : + c = 'C'; + break; + case SHORT : + c = 'S'; + break; + case INT : + c = 'I'; + break; + case LONG : + c = 'J'; + break; + case FLOAT : + c = 'F'; + break; + case DOUBLE : + c = 'D'; + break; + case VOID : + c = 'V'; + break; + } + + StringBuffer sbuf = new StringBuffer(); + while (dim-- > 0) + sbuf.append('['); + + sbuf.append(c); + return sbuf.toString(); + } + + public void compileExpr(ASTree expr) throws CompileError { + doTypeCheck(expr); + expr.accept(this); + } + + public boolean compileBooleanExpr(boolean branchIf, ASTree expr) + throws CompileError + { + doTypeCheck(expr); + return booleanExpr(branchIf, expr); + } + + public void doTypeCheck(ASTree expr) throws CompileError { + if (typeChecker != null) + expr.accept(typeChecker); + } + + public void atASTList(ASTList n) throws CompileError { fatal(); } + + public void atPair(Pair n) throws CompileError { fatal(); } + + public void atSymbol(Symbol n) throws CompileError { fatal(); } + + public void atFieldDecl(FieldDecl field) throws CompileError { + field.getInit().accept(this); + } + + public void atMethodDecl(MethodDecl method) throws CompileError { + ASTList mods = method.getModifiers(); + setMaxLocals(1); + while (mods != null) { + Keyword k = (Keyword)mods.head(); + mods = mods.tail(); + if (k.get() == STATIC) { + setMaxLocals(0); + inStaticMethod = true; + } + } + + ASTList params = method.getParams(); + while (params != null) { + atDeclarator((Declarator)params.head()); + params = params.tail(); + } + + Stmnt s = method.getBody(); + atMethodBody(s, method.isConstructor(), + method.getReturn().getType() == VOID); + } + + /** + * @param isCons true if super() must be called. + * false if the method is a class initializer. + */ + public void atMethodBody(Stmnt s, boolean isCons, boolean isVoid) + throws CompileError + { + if (s == null) + return; + + if (isCons && needsSuperCall(s)) + insertDefaultSuperCall(); + + hasReturned = false; + s.accept(this); + if (!hasReturned) + if (isVoid) { + bytecode.addOpcode(Opcode.RETURN); + hasReturned = true; + } + else + throw new CompileError("no return statement"); + } + + private boolean needsSuperCall(Stmnt body) throws CompileError { + if (body.getOperator() == BLOCK) + body = (Stmnt)body.head(); + + if (body != null && body.getOperator() == EXPR) { + ASTree expr = body.head(); + if (expr != null && expr instanceof Expr + && ((Expr)expr).getOperator() == CALL) { + ASTree target = ((Expr)expr).head(); + if (target instanceof Keyword) { + int token = ((Keyword)target).get(); + return token != THIS && token != SUPER; + } + } + } + + return true; + } + + protected abstract void insertDefaultSuperCall() throws CompileError; + + public void atStmnt(Stmnt st) throws CompileError { + if (st == null) + return; // empty + + int op = st.getOperator(); + if (op == EXPR) { + ASTree expr = st.getLeft(); + doTypeCheck(expr); + if (expr instanceof AssignExpr) + atAssignExpr((AssignExpr)expr, false); + else if (isPlusPlusExpr(expr)) { + Expr e = (Expr)expr; + atPlusPlus(e.getOperator(), e.oprand1(), e, false); + } + else { + expr.accept(this); + if (is2word(exprType, arrayDim)) + bytecode.addOpcode(POP2); + else if (exprType != VOID) + bytecode.addOpcode(POP); + } + } + else if (op == DECL || op == BLOCK) { + ASTList list = st; + while (list != null) { + ASTree h = list.head(); + list = list.tail(); + if (h != null) + h.accept(this); + } + } + else if (op == IF) + atIfStmnt(st); + else if (op == WHILE || op == DO) + atWhileStmnt(st, op == WHILE); + else if (op == FOR) + atForStmnt(st); + else if (op == BREAK || op == CONTINUE) + atBreakStmnt(st, op == BREAK); + else if (op == TokenId.RETURN) + atReturnStmnt(st); + else if (op == THROW) + atThrowStmnt(st); + else if (op == TRY) + atTryStmnt(st); + else if (op == SWITCH) + atSwitchStmnt(st); + else if (op == SYNCHRONIZED) + atSyncStmnt(st); + else { + // LABEL, SWITCH label stament might be null?. + hasReturned = false; + throw new CompileError( + "sorry, not supported statement: TokenId " + op); + } + } + + private void atIfStmnt(Stmnt st) throws CompileError { + ASTree expr = st.head(); + Stmnt thenp = (Stmnt)st.tail().head(); + Stmnt elsep = (Stmnt)st.tail().tail().head(); + if (compileBooleanExpr(false, expr)) { + hasReturned = false; + if (elsep != null) + elsep.accept(this); + + return; + } + + int pc = bytecode.currentPc(); + int pc2 = 0; + bytecode.addIndex(0); // correct later + + hasReturned = false; + if (thenp != null) + thenp.accept(this); + + boolean thenHasReturned = hasReturned; + hasReturned = false; + + if (elsep != null && !thenHasReturned) { + bytecode.addOpcode(Opcode.GOTO); + pc2 = bytecode.currentPc(); + bytecode.addIndex(0); + } + + bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); + if (elsep != null) { + elsep.accept(this); + if (!thenHasReturned) + bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1); + + hasReturned = thenHasReturned && hasReturned; + } + } + + private void atWhileStmnt(Stmnt st, boolean notDo) throws CompileError { + ArrayList prevBreakList = breakList; + ArrayList prevContList = continueList; + breakList = new ArrayList(); + continueList = new ArrayList(); + + ASTree expr = st.head(); + Stmnt body = (Stmnt)st.tail(); + + int pc = 0; + if (notDo) { + bytecode.addOpcode(Opcode.GOTO); + pc = bytecode.currentPc(); + bytecode.addIndex(0); + } + + int pc2 = bytecode.currentPc(); + if (body != null) + body.accept(this); + + int pc3 = bytecode.currentPc(); + if (notDo) + bytecode.write16bit(pc, pc3 - pc + 1); + + boolean alwaysBranch = compileBooleanExpr(true, expr); + if (alwaysBranch) { + bytecode.addOpcode(Opcode.GOTO); + alwaysBranch = breakList.size() == 0; + } + + bytecode.addIndex(pc2 - bytecode.currentPc() + 1); + patchGoto(breakList, bytecode.currentPc()); + patchGoto(continueList, pc3); + continueList = prevContList; + breakList = prevBreakList; + hasReturned = alwaysBranch; + } + + protected void patchGoto(ArrayList list, int targetPc) { + int n = list.size(); + for (int i = 0; i < n; ++i) { + int pc = ((Integer)list.get(i)).intValue(); + bytecode.write16bit(pc, targetPc - pc + 1); + } + } + + private void atForStmnt(Stmnt st) throws CompileError { + ArrayList prevBreakList = breakList; + ArrayList prevContList = continueList; + breakList = new ArrayList(); + continueList = new ArrayList(); + + Stmnt init = (Stmnt)st.head(); + ASTList p = st.tail(); + ASTree expr = p.head(); + p = p.tail(); + Stmnt update = (Stmnt)p.head(); + Stmnt body = (Stmnt)p.tail(); + + if (init != null) + init.accept(this); + + int pc = bytecode.currentPc(); + int pc2 = 0; + if (expr != null) { + if (compileBooleanExpr(false, expr)) { + // in case of "for (...; false; ...)" + continueList = prevContList; + breakList = prevBreakList; + hasReturned = false; + return; + } + + pc2 = bytecode.currentPc(); + bytecode.addIndex(0); + } + + if (body != null) + body.accept(this); + + int pc3 = bytecode.currentPc(); + if (update != null) + update.accept(this); + + bytecode.addOpcode(Opcode.GOTO); + bytecode.addIndex(pc - bytecode.currentPc() + 1); + + int pc4 = bytecode.currentPc(); + if (expr != null) + bytecode.write16bit(pc2, pc4 - pc2 + 1); + + patchGoto(breakList, pc4); + patchGoto(continueList, pc3); + continueList = prevContList; + breakList = prevBreakList; + hasReturned = false; + } + + private void atSwitchStmnt(Stmnt st) throws CompileError { + compileExpr(st.head()); + + ArrayList prevBreakList = breakList; + breakList = new ArrayList(); + int opcodePc = bytecode.currentPc(); + bytecode.addOpcode(LOOKUPSWITCH); + int npads = 3 - (opcodePc & 3); + while (npads-- > 0) + bytecode.add(0); + + Stmnt body = (Stmnt)st.tail(); + int npairs = 0; + for (ASTList list = body; list != null; list = list.tail()) + if (((Stmnt)list.head()).getOperator() == CASE) + ++npairs; + + // opcodePc2 is the position at which the default jump offset is. + int opcodePc2 = bytecode.currentPc(); + bytecode.addGap(4); + bytecode.add32bit(npairs); + bytecode.addGap(npairs * 8); + + long[] pairs = new long[npairs]; + int ipairs = 0; + int defaultPc = -1; + for (ASTList list = body; list != null; list = list.tail()) { + Stmnt label = (Stmnt)list.head(); + int op = label.getOperator(); + if (op == DEFAULT) + defaultPc = bytecode.currentPc(); + else if (op != CASE) + fatal(); + else { + pairs[ipairs++] + = ((long)computeLabel(label.head()) << 32) + + ((long)(bytecode.currentPc() - opcodePc) & 0xffffffff); + } + + hasReturned = false; + ((Stmnt)label.tail()).accept(this); + } + + Arrays.sort(pairs); + int pc = opcodePc2 + 8; + for (int i = 0; i < npairs; ++i) { + bytecode.write32bit(pc, (int)(pairs[i] >>> 32)); + bytecode.write32bit(pc + 4, (int)pairs[i]); + pc += 8; + } + + if (defaultPc < 0 || breakList.size() > 0) + hasReturned = false; + + int endPc = bytecode.currentPc(); + if (defaultPc < 0) + defaultPc = endPc; + + bytecode.write32bit(opcodePc2, defaultPc - opcodePc); + + patchGoto(breakList, endPc); + breakList = prevBreakList; + } + + private int computeLabel(ASTree expr) throws CompileError { + doTypeCheck(expr); + expr = TypeChecker.stripPlusExpr(expr); + if (expr instanceof IntConst) + return (int)((IntConst)expr).get(); + else + throw new CompileError("bad case label"); + } + + private void atBreakStmnt(Stmnt st, boolean notCont) + throws CompileError + { + if (st.head() != null) + throw new CompileError( + "sorry, not support labeled break or continue"); + + bytecode.addOpcode(Opcode.GOTO); + Integer pc = new Integer(bytecode.currentPc()); + bytecode.addIndex(0); + if (notCont) + breakList.add(pc); + else + continueList.add(pc); + } + + protected void atReturnStmnt(Stmnt st) throws CompileError { + atReturnStmnt2(st.getLeft()); + } + + protected final void atReturnStmnt2(ASTree result) throws CompileError { + int op; + if (result == null) + op = Opcode.RETURN; + else { + compileExpr(result); + if (arrayDim > 0) + op = ARETURN; + else { + int type = exprType; + if (type == DOUBLE) + op = DRETURN; + else if (type == FLOAT) + op = FRETURN; + else if (type == LONG) + op = LRETURN; + else if (isRefType(type)) + op = ARETURN; + else + op = IRETURN; + } + } + + for (ReturnHook har = returnHooks; har != null; har = har.next) + if (har.doit(bytecode, op)) { + hasReturned = true; + return; + } + + bytecode.addOpcode(op); + hasReturned = true; + } + + private void atThrowStmnt(Stmnt st) throws CompileError { + ASTree e = st.getLeft(); + compileExpr(e); + if (exprType != CLASS || arrayDim > 0) + throw new CompileError("bad throw statement"); + + bytecode.addOpcode(ATHROW); + hasReturned = true; + } + + /* overridden in MemberCodeGen + */ + protected void atTryStmnt(Stmnt st) throws CompileError { + hasReturned = false; + } + + private void atSyncStmnt(Stmnt st) throws CompileError { + int nbreaks = getListSize(breakList); + int ncontinues = getListSize(continueList); + + compileExpr(st.head()); + if (exprType != CLASS && arrayDim == 0) + throw new CompileError("bad type expr for synchronized block"); + + Bytecode bc = bytecode; + final int var = bc.getMaxLocals(); + bc.incMaxLocals(1); + bc.addOpcode(DUP); + bc.addAstore(var); + bc.addOpcode(MONITORENTER); + + ReturnHook rh = new ReturnHook(this) { + protected boolean doit(Bytecode b, int opcode) { + b.addAload(var); + b.addOpcode(MONITOREXIT); + return false; + } + }; + + int pc = bc.currentPc(); + Stmnt body = (Stmnt)st.tail(); + if (body != null) + body.accept(this); + + int pc2 = bc.currentPc(); + int pc3 = 0; + if (!hasReturned) { + rh.doit(bc, 0); // the 2nd arg is ignored. + bc.addOpcode(Opcode.GOTO); + pc3 = bc.currentPc(); + bc.addIndex(0); + } + + if (pc < pc2) { // if the body is not empty + int pc4 = bc.currentPc(); + rh.doit(bc, 0); // the 2nd arg is ignored. + bc.addOpcode(ATHROW); + bc.addExceptionHandler(pc, pc2, pc4, 0); + } + + if (!hasReturned) + bc.write16bit(pc3, bc.currentPc() - pc3 + 1); + + rh.remove(this); + + if (getListSize(breakList) != nbreaks + || getListSize(continueList) != ncontinues) + throw new CompileError( + "sorry, cannot break/continue in synchronized block"); + } + + private static int getListSize(ArrayList list) { + return list == null ? 0 : list.size(); + } + + private static boolean isPlusPlusExpr(ASTree expr) { + if (expr instanceof Expr) { + int op = ((Expr)expr).getOperator(); + return op == PLUSPLUS || op == MINUSMINUS; + } + + return false; + } + + public void atDeclarator(Declarator d) throws CompileError { + d.setLocalVar(getMaxLocals()); + d.setClassName(resolveClassName(d.getClassName())); + + int size; + if (is2word(d.getType(), d.getArrayDim())) + size = 2; + else + size = 1; + + incMaxLocals(size); + + /* NOTE: Array initializers has not been supported. + */ + ASTree init = d.getInitializer(); + if (init != null) { + doTypeCheck(init); + atVariableAssign(null, '=', null, d, init, false); + } + } + + public abstract void atNewExpr(NewExpr n) throws CompileError; + + public abstract void atArrayInit(ArrayInit init) throws CompileError; + + public void atAssignExpr(AssignExpr expr) throws CompileError { + atAssignExpr(expr, true); + } + + protected void atAssignExpr(AssignExpr expr, boolean doDup) + throws CompileError + { + // =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, >>>= + int op = expr.getOperator(); + ASTree left = expr.oprand1(); + ASTree right = expr.oprand2(); + if (left instanceof Variable) + atVariableAssign(expr, op, (Variable)left, + ((Variable)left).getDeclarator(), + right, doDup); + else { + if (left instanceof Expr) { + Expr e = (Expr)left; + if (e.getOperator() == ARRAY) { + atArrayAssign(expr, op, (Expr)left, right, doDup); + return; + } + } + + atFieldAssign(expr, op, left, right, doDup); + } + } + + protected static void badAssign(Expr expr) throws CompileError { + String msg; + if (expr == null) + msg = "incompatible type for assignment"; + else + msg = "incompatible type for " + expr.getName(); + + throw new CompileError(msg); + } + + /* op is either =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, or >>>=. + * + * expr and var can be null. + */ + private void atVariableAssign(Expr expr, int op, Variable var, + Declarator d, ASTree right, + boolean doDup) throws CompileError + { + int varType = d.getType(); + int varArray = d.getArrayDim(); + String varClass = d.getClassName(); + int varNo = getLocalVar(d); + + if (op != '=') + atVariable(var); + + // expr is null if the caller is atDeclarator(). + if (expr == null && right instanceof ArrayInit) + atArrayVariableAssign((ArrayInit)right, varType, varArray, varClass); + else + atAssignCore(expr, op, right, varType, varArray, varClass); + + if (doDup) + if (is2word(varType, varArray)) + bytecode.addOpcode(DUP2); + else + bytecode.addOpcode(DUP); + + if (varArray > 0) + bytecode.addAstore(varNo); + else if (varType == DOUBLE) + bytecode.addDstore(varNo); + else if (varType == FLOAT) + bytecode.addFstore(varNo); + else if (varType == LONG) + bytecode.addLstore(varNo); + else if (isRefType(varType)) + bytecode.addAstore(varNo); + else + bytecode.addIstore(varNo); + + exprType = varType; + arrayDim = varArray; + className = varClass; + } + + protected abstract void atArrayVariableAssign(ArrayInit init, + int varType, int varArray, String varClass) throws CompileError; + + private void atArrayAssign(Expr expr, int op, Expr array, + ASTree right, boolean doDup) throws CompileError + { + arrayAccess(array.oprand1(), array.oprand2()); + + if (op != '=') { + bytecode.addOpcode(DUP2); + bytecode.addOpcode(getArrayReadOp(exprType, arrayDim)); + } + + int aType = exprType; + int aDim = arrayDim; + String cname = className; + + atAssignCore(expr, op, right, aType, aDim, cname); + + if (doDup) + if (is2word(aType, aDim)) + bytecode.addOpcode(DUP2_X2); + else + bytecode.addOpcode(DUP_X2); + + bytecode.addOpcode(getArrayWriteOp(aType, aDim)); + exprType = aType; + arrayDim = aDim; + className = cname; + } + + protected abstract void atFieldAssign(Expr expr, int op, ASTree left, + ASTree right, boolean doDup) throws CompileError; + + protected void atAssignCore(Expr expr, int op, ASTree right, + int type, int dim, String cname) + throws CompileError + { + if (op == PLUS_E && dim == 0 && type == CLASS) + atStringPlusEq(expr, type, dim, cname, right); + else { + right.accept(this); + if (invalidDim(exprType, arrayDim, className, type, dim, cname, + false) || (op != '=' && dim > 0)) + badAssign(expr); + + if (op != '=') { + int token = assignOps[op - MOD_E]; + int k = lookupBinOp(token); + if (k < 0) + fatal(); + + atArithBinExpr(expr, token, k, type); + } + } + + if (op != '=' || (dim == 0 && !isRefType(type))) + atNumCastExpr(exprType, type); + + // type check should be done here. + } + + private void atStringPlusEq(Expr expr, int type, int dim, String cname, + ASTree right) + throws CompileError + { + if (!jvmJavaLangString.equals(cname)) + badAssign(expr); + + convToString(type, dim); // the value might be null. + right.accept(this); + convToString(exprType, arrayDim); + bytecode.addInvokevirtual(javaLangString, "concat", + "(Ljava/lang/String;)Ljava/lang/String;"); + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangString; + } + + private boolean invalidDim(int srcType, int srcDim, String srcClass, + int destType, int destDim, String destClass, + boolean isCast) + { + if (srcDim != destDim) + if (srcType == NULL) + return false; + else if (destDim == 0 && destType == CLASS + && jvmJavaLangObject.equals(destClass)) + return false; + else if (isCast && srcDim == 0 && srcType == CLASS + && jvmJavaLangObject.equals(srcClass)) + return false; + else + return true; + + return false; + } + + public void atCondExpr(CondExpr expr) throws CompileError { + if (booleanExpr(false, expr.condExpr())) + expr.elseExpr().accept(this); + else { + int pc = bytecode.currentPc(); + bytecode.addIndex(0); // correct later + expr.thenExpr().accept(this); + int dim1 = arrayDim; + bytecode.addOpcode(Opcode.GOTO); + int pc2 = bytecode.currentPc(); + bytecode.addIndex(0); + bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); + expr.elseExpr().accept(this); + if (dim1 != arrayDim) + throw new CompileError("type mismatch in ?:"); + + bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1); + } + } + + static final int[] binOp = { + '+', DADD, FADD, LADD, IADD, + '-', DSUB, FSUB, LSUB, ISUB, + '*', DMUL, FMUL, LMUL, IMUL, + '/', DDIV, FDIV, LDIV, IDIV, + '%', DREM, FREM, LREM, IREM, + '|', NOP, NOP, LOR, IOR, + '^', NOP, NOP, LXOR, IXOR, + '&', NOP, NOP, LAND, IAND, + LSHIFT, NOP, NOP, LSHL, ISHL, + RSHIFT, NOP, NOP, LSHR, ISHR, + ARSHIFT, NOP, NOP, LUSHR, IUSHR }; + + static int lookupBinOp(int token) { + int[] code = binOp; + int s = code.length; + for (int k = 0; k < s; k = k + 5) + if (code[k] == token) + return k; + + return -1; + } + + public void atBinExpr(BinExpr expr) throws CompileError { + int token = expr.getOperator(); + + /* arithmetic operators: +, -, *, /, %, |, ^, &, <<, >>, >>> + */ + int k = lookupBinOp(token); + if (k >= 0) { + expr.oprand1().accept(this); + ASTree right = expr.oprand2(); + if (right == null) + return; // see TypeChecker.atBinExpr(). + + int type1 = exprType; + int dim1 = arrayDim; + String cname1 = className; + right.accept(this); + if (dim1 != arrayDim) + throw new CompileError("incompatible array types"); + + if (token == '+' && dim1 == 0 + && (type1 == CLASS || exprType == CLASS)) + atStringConcatExpr(expr, type1, dim1, cname1); + else + atArithBinExpr(expr, token, k, type1); + } + else { + /* equation: &&, ||, ==, !=, <=, >=, <, > + */ + if (!booleanExpr(true, expr)) { + bytecode.addIndex(7); + bytecode.addIconst(0); // false + bytecode.addOpcode(Opcode.GOTO); + bytecode.addIndex(4); + } + + bytecode.addIconst(1); // true + } + } + + /* arrayDim values of the two oprands must be equal. + * If an oprand type is not a numeric type, this method + * throws an exception. + */ + private void atArithBinExpr(Expr expr, int token, + int index, int type1) throws CompileError + { + if (arrayDim != 0) + badTypes(expr); + + int type2 = exprType; + if (token == LSHIFT || token == RSHIFT || token == ARSHIFT) + if (type2 == INT || type2 == SHORT + || type2 == CHAR || type2 == BYTE) + exprType = type1; + else + badTypes(expr); + else + convertOprandTypes(type1, type2, expr); + + int p = typePrecedence(exprType); + if (p >= 0) { + int op = binOp[index + p + 1]; + if (op != NOP) { + if (p == P_INT && exprType != BOOLEAN) + exprType = INT; // type1 may be BYTE, ... + + bytecode.addOpcode(op); + return; + } + } + + badTypes(expr); + } + + private void atStringConcatExpr(Expr expr, int type1, int dim1, + String cname1) throws CompileError + { + int type2 = exprType; + int dim2 = arrayDim; + boolean type2Is2 = is2word(type2, dim2); + boolean type2IsString + = (type2 == CLASS && jvmJavaLangString.equals(className)); + + if (type2Is2) + convToString(type2, dim2); + + if (is2word(type1, dim1)) { + bytecode.addOpcode(DUP_X2); + bytecode.addOpcode(POP); + } + else + bytecode.addOpcode(SWAP); + + // even if type1 is String, the left operand might be null. + convToString(type1, dim1); + bytecode.addOpcode(SWAP); + + if (!type2Is2 && !type2IsString) + convToString(type2, dim2); + + bytecode.addInvokevirtual(javaLangString, "concat", + "(Ljava/lang/String;)Ljava/lang/String;"); + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangString; + } + + private void convToString(int type, int dim) throws CompileError { + final String method = "valueOf"; + + if (isRefType(type) || dim > 0) + bytecode.addInvokestatic(javaLangString, method, + "(Ljava/lang/Object;)Ljava/lang/String;"); + else if (type == DOUBLE) + bytecode.addInvokestatic(javaLangString, method, + "(D)Ljava/lang/String;"); + else if (type == FLOAT) + bytecode.addInvokestatic(javaLangString, method, + "(F)Ljava/lang/String;"); + else if (type == LONG) + bytecode.addInvokestatic(javaLangString, method, + "(J)Ljava/lang/String;"); + else if (type == BOOLEAN) + bytecode.addInvokestatic(javaLangString, method, + "(Z)Ljava/lang/String;"); + else if (type == CHAR) + bytecode.addInvokestatic(javaLangString, method, + "(C)Ljava/lang/String;"); + else if (type == VOID) + throw new CompileError("void type expression"); + else /* INT, BYTE, SHORT */ + bytecode.addInvokestatic(javaLangString, method, + "(I)Ljava/lang/String;"); + } + + /* Produces the opcode to branch if the condition is true. + * The oprand (branch offset) is not produced. + * + * @return true if the compiled code is GOTO (always branch). + * GOTO is not produced. + */ + private boolean booleanExpr(boolean branchIf, ASTree expr) + throws CompileError + { + boolean isAndAnd; + int op = getCompOperator(expr); + if (op == EQ) { // ==, !=, ... + BinExpr bexpr = (BinExpr)expr; + int type1 = compileOprands(bexpr); + // here, arrayDim might represent the array dim. of the left oprand + // if the right oprand is NULL. + compareExpr(branchIf, bexpr.getOperator(), type1, bexpr); + } + else if (op == '!') + return booleanExpr(!branchIf, ((Expr)expr).oprand1()); + else if ((isAndAnd = (op == ANDAND)) || op == OROR) { + BinExpr bexpr = (BinExpr)expr; + if (booleanExpr(!isAndAnd, bexpr.oprand1())) { + exprType = BOOLEAN; + arrayDim = 0; + return true; + } + else { + int pc = bytecode.currentPc(); + bytecode.addIndex(0); // correct later + if (booleanExpr(isAndAnd, bexpr.oprand2())) + bytecode.addOpcode(Opcode.GOTO); + + bytecode.write16bit(pc, bytecode.currentPc() - pc + 3); + if (branchIf != isAndAnd) { + bytecode.addIndex(6); // skip GOTO instruction + bytecode.addOpcode(Opcode.GOTO); + } + } + } + else if (isAlwaysBranch(expr, branchIf)) { + // Opcode.GOTO is not added here. The caller must add it. + exprType = BOOLEAN; + arrayDim = 0; + return true; // always branch + } + else { // others + expr.accept(this); + if (exprType != BOOLEAN || arrayDim != 0) + throw new CompileError("boolean expr is required"); + + bytecode.addOpcode(branchIf ? IFNE : IFEQ); + } + + exprType = BOOLEAN; + arrayDim = 0; + return false; + } + + private static boolean isAlwaysBranch(ASTree expr, boolean branchIf) { + if (expr instanceof Keyword) { + int t = ((Keyword)expr).get(); + return branchIf ? t == TRUE : t == FALSE; + } + + return false; + } + + static int getCompOperator(ASTree expr) throws CompileError { + if (expr instanceof Expr) { + Expr bexpr = (Expr)expr; + int token = bexpr.getOperator(); + if (token == '!') + return '!'; + else if ((bexpr instanceof BinExpr) + && token != OROR && token != ANDAND + && token != '&' && token != '|') + return EQ; // ==, !=, ... + else + return token; + } + + return ' '; // others + } + + private int compileOprands(BinExpr expr) throws CompileError { + expr.oprand1().accept(this); + int type1 = exprType; + int dim1 = arrayDim; + expr.oprand2().accept(this); + if (dim1 != arrayDim) + if (type1 != NULL && exprType != NULL) + throw new CompileError("incompatible array types"); + else if (exprType == NULL) + arrayDim = dim1; + + if (type1 == NULL) + return exprType; + else + return type1; + } + + private static final int ifOp[] = { EQ, IF_ICMPEQ, IF_ICMPNE, + NEQ, IF_ICMPNE, IF_ICMPEQ, + LE, IF_ICMPLE, IF_ICMPGT, + GE, IF_ICMPGE, IF_ICMPLT, + '<', IF_ICMPLT, IF_ICMPGE, + '>', IF_ICMPGT, IF_ICMPLE }; + + private static final int ifOp2[] = { EQ, IFEQ, IFNE, + NEQ, IFNE, IFEQ, + LE, IFLE, IFGT, + GE, IFGE, IFLT, + '<', IFLT, IFGE, + '>', IFGT, IFLE }; + + /* Produces the opcode to branch if the condition is true. + * The oprands are not produced. + * + * Parameter expr - compare expression ==, !=, <=, >=, <, > + */ + private void compareExpr(boolean branchIf, + int token, int type1, BinExpr expr) + throws CompileError + { + if (arrayDim == 0) + convertOprandTypes(type1, exprType, expr); + + int p = typePrecedence(exprType); + if (p == P_OTHER || arrayDim > 0) + if (token == EQ) + bytecode.addOpcode(branchIf ? IF_ACMPEQ : IF_ACMPNE); + else if (token == NEQ) + bytecode.addOpcode(branchIf ? IF_ACMPNE : IF_ACMPEQ); + else + badTypes(expr); + else + if (p == P_INT) { + int op[] = ifOp; + for (int i = 0; i < op.length; i += 3) + if (op[i] == token) { + bytecode.addOpcode(op[i + (branchIf ? 1 : 2)]); + return; + } + + badTypes(expr); + } + else { + if (p == P_DOUBLE) + if (token == '<' || token == LE) + bytecode.addOpcode(DCMPG); + else + bytecode.addOpcode(DCMPL); + else if (p == P_FLOAT) + if (token == '<' || token == LE) + bytecode.addOpcode(FCMPG); + else + bytecode.addOpcode(FCMPL); + else if (p == P_LONG) + bytecode.addOpcode(LCMP); // 1: >, 0: =, -1: < + else + fatal(); + + int[] op = ifOp2; + for (int i = 0; i < op.length; i += 3) + if (op[i] == token) { + bytecode.addOpcode(op[i + (branchIf ? 1 : 2)]); + return; + } + + badTypes(expr); + } + } + + protected static void badTypes(Expr expr) throws CompileError { + throw new CompileError("invalid types for " + expr.getName()); + } + + private static final int P_DOUBLE = 0; + private static final int P_FLOAT = 1; + private static final int P_LONG = 2; + private static final int P_INT = 3; + private static final int P_OTHER = -1; + + protected static boolean isRefType(int type) { + return type == CLASS || type == NULL; + } + + private static int typePrecedence(int type) { + if (type == DOUBLE) + return P_DOUBLE; + else if (type == FLOAT) + return P_FLOAT; + else if (type == LONG) + return P_LONG; + else if (isRefType(type)) + return P_OTHER; + else if (type == VOID) + return P_OTHER; // this is wrong, but ... + else + return P_INT; // BOOLEAN, BYTE, CHAR, SHORT, INT + } + + // used in TypeChecker. + static boolean isP_INT(int type) { + return typePrecedence(type) == P_INT; + } + + // used in TypeChecker. + static boolean rightIsStrong(int type1, int type2) { + int type1_p = typePrecedence(type1); + int type2_p = typePrecedence(type2); + return type1_p >= 0 && type2_p >= 0 && type1_p > type2_p; + } + + private static final int[] castOp = { + /* D F L I */ + /* double */ NOP, D2F, D2L, D2I, + /* float */ F2D, NOP, F2L, F2I, + /* long */ L2D, L2F, NOP, L2I, + /* other */ I2D, I2F, I2L, NOP }; + + /* do implicit type conversion. + * arrayDim values of the two oprands must be zero. + */ + private void convertOprandTypes(int type1, int type2, Expr expr) + throws CompileError + { + boolean rightStrong; + int type1_p = typePrecedence(type1); + int type2_p = typePrecedence(type2); + + if (type2_p < 0 && type1_p < 0) // not primitive types + return; + + if (type2_p < 0 || type1_p < 0) // either is not a primitive type + badTypes(expr); + + int op, result_type; + if (type1_p <= type2_p) { + rightStrong = false; + exprType = type1; + op = castOp[type2_p * 4 + type1_p]; + result_type = type1_p; + } + else { + rightStrong = true; + op = castOp[type1_p * 4 + type2_p]; + result_type = type2_p; + } + + if (rightStrong) { + if (result_type == P_DOUBLE || result_type == P_LONG) { + if (type1_p == P_DOUBLE || type1_p == P_LONG) + bytecode.addOpcode(DUP2_X2); + else + bytecode.addOpcode(DUP2_X1); + + bytecode.addOpcode(POP2); + bytecode.addOpcode(op); + bytecode.addOpcode(DUP2_X2); + bytecode.addOpcode(POP2); + } + else if (result_type == P_FLOAT) { + if (type1_p == P_LONG) { + bytecode.addOpcode(DUP_X2); + bytecode.addOpcode(POP); + } + else + bytecode.addOpcode(SWAP); + + bytecode.addOpcode(op); + bytecode.addOpcode(SWAP); + } + else + fatal(); + } + else if (op != NOP) + bytecode.addOpcode(op); + } + + public void atCastExpr(CastExpr expr) throws CompileError { + String cname = resolveClassName(expr.getClassName()); + String toClass = checkCastExpr(expr, cname); + int srcType = exprType; + exprType = expr.getType(); + arrayDim = expr.getArrayDim(); + className = cname; + if (toClass == null) + atNumCastExpr(srcType, exprType); // built-in type + else + bytecode.addCheckcast(toClass); + } + + public void atInstanceOfExpr(InstanceOfExpr expr) throws CompileError { + String cname = resolveClassName(expr.getClassName()); + String toClass = checkCastExpr(expr, cname); + bytecode.addInstanceof(toClass); + exprType = BOOLEAN; + arrayDim = 0; + } + + private String checkCastExpr(CastExpr expr, String name) + throws CompileError + { + final String msg = "invalid cast"; + ASTree oprand = expr.getOprand(); + int dim = expr.getArrayDim(); + int type = expr.getType(); + oprand.accept(this); + int srcType = exprType; + if (invalidDim(srcType, arrayDim, className, type, dim, name, true) + || srcType == VOID || type == VOID) + throw new CompileError(msg); + + if (type == CLASS) { + if (!isRefType(srcType)) + throw new CompileError(msg); + + return toJvmArrayName(name, dim); + } + else + if (dim > 0) + return toJvmTypeName(type, dim); + else + return null; // built-in type + } + + void atNumCastExpr(int srcType, int destType) + throws CompileError + { + if (srcType == destType) + return; + + int op, op2; + int stype = typePrecedence(srcType); + int dtype = typePrecedence(destType); + if (0 <= stype && stype < 3) + op = castOp[stype * 4 + dtype]; + else + op = NOP; + + if (destType == DOUBLE) + op2 = I2D; + else if (destType == FLOAT) + op2 = I2F; + else if (destType == LONG) + op2 = I2L; + else if (destType == SHORT) + op2 = I2S; + else if (destType == CHAR) + op2 = I2C; + else if (destType == BYTE) + op2 = I2B; + else + op2 = NOP; + + if (op != NOP) + bytecode.addOpcode(op); + + if (op == NOP || op == L2I || op == F2I || op == D2I) + if (op2 != NOP) + bytecode.addOpcode(op2); + } + + public void atExpr(Expr expr) throws CompileError { + // array access, member access, + // (unary) +, (unary) -, ++, --, !, ~ + + int token = expr.getOperator(); + ASTree oprand = expr.oprand1(); + if (token == '.') { + String member = ((Symbol)expr.oprand2()).get(); + if (member.equals("class")) + atClassObject(expr); // .class + else + atFieldRead(expr); + } + else if (token == MEMBER) { // field read + /* MEMBER ('#') is an extension by Javassist. + * The compiler internally uses # for compiling .class + * expressions such as "int.class". + */ + atFieldRead(expr); + } + else if (token == ARRAY) + atArrayRead(oprand, expr.oprand2()); + else if (token == PLUSPLUS || token == MINUSMINUS) + atPlusPlus(token, oprand, expr, true); + else if (token == '!') { + if (!booleanExpr(false, expr)) { + bytecode.addIndex(7); + bytecode.addIconst(1); + bytecode.addOpcode(Opcode.GOTO); + bytecode.addIndex(4); + } + + bytecode.addIconst(0); + } + else if (token == CALL) // method call + fatal(); + else { + expr.oprand1().accept(this); + int type = typePrecedence(exprType); + if (arrayDim > 0) + badType(expr); + + if (token == '-') { + if (type == P_DOUBLE) + bytecode.addOpcode(DNEG); + else if (type == P_FLOAT) + bytecode.addOpcode(FNEG); + else if (type == P_LONG) + bytecode.addOpcode(LNEG); + else if (type == P_INT) { + bytecode.addOpcode(INEG); + exprType = INT; // type may be BYTE, ... + } + else + badType(expr); + } + else if (token == '~') { + if (type == P_INT) { + bytecode.addIconst(-1); + bytecode.addOpcode(IXOR); + exprType = INT; // type may be BYTE. ... + } + else if (type == P_LONG) { + bytecode.addLconst(-1); + bytecode.addOpcode(LXOR); + } + else + badType(expr); + + } + else if (token == '+') { + if (type == P_OTHER) + badType(expr); + + // do nothing. ignore. + } + else + fatal(); + } + } + + protected static void badType(Expr expr) throws CompileError { + throw new CompileError("invalid type for " + expr.getName()); + } + + public abstract void atCallExpr(CallExpr expr) throws CompileError; + + protected abstract void atFieldRead(ASTree expr) throws CompileError; + + public void atClassObject(Expr expr) throws CompileError { + ASTree op1 = expr.oprand1(); + if (!(op1 instanceof Symbol)) + throw new CompileError("fatal error: badly parsed .class expr"); + + String cname = ((Symbol)op1).get(); + if (cname.startsWith("[")) { + int i = cname.indexOf("[L"); + if (i >= 0) { + String name = cname.substring(i + 2, cname.length() - 1); + String name2 = resolveClassName(name); + if (!name.equals(name2)) { + /* For example, to obtain String[].class, + * "[Ljava.lang.String;" (not "[Ljava/lang/String"!) + * must be passed to Class.forName(). + */ + name2 = MemberResolver.jvmToJavaName(name2); + StringBuffer sbuf = new StringBuffer(); + while (i-- >= 0) + sbuf.append('['); + + sbuf.append('L').append(name2).append(';'); + cname = sbuf.toString(); + } + } + } + else { + cname = resolveClassName(MemberResolver.javaToJvmName(cname)); + cname = MemberResolver.jvmToJavaName(cname); + } + + atClassObject2(cname); + exprType = CLASS; + arrayDim = 0; + className = "java/lang/Class"; + } + + /* MemberCodeGen overrides this method. + */ + protected void atClassObject2(String cname) throws CompileError { + int start = bytecode.currentPc(); + bytecode.addLdc(cname); + bytecode.addInvokestatic("java.lang.Class", "forName", + "(Ljava/lang/String;)Ljava/lang/Class;"); + int end = bytecode.currentPc(); + bytecode.addOpcode(Opcode.GOTO); + int pc = bytecode.currentPc(); + bytecode.addIndex(0); // correct later + + bytecode.addExceptionHandler(start, end, bytecode.currentPc(), + "java.lang.ClassNotFoundException"); + + /* -- the following code is for inlining a call to DotClass.fail(). + + int var = getMaxLocals(); + incMaxLocals(1); + bytecode.growStack(1); + bytecode.addAstore(var); + + bytecode.addNew("java.lang.NoClassDefFoundError"); + bytecode.addOpcode(DUP); + bytecode.addAload(var); + bytecode.addInvokevirtual("java.lang.ClassNotFoundException", + "getMessage", "()Ljava/lang/String;"); + bytecode.addInvokespecial("java.lang.NoClassDefFoundError", "", + "(Ljava/lang/String;)V"); + */ + + bytecode.growStack(1); + bytecode.addInvokestatic("javassist.runtime.DotClass", "fail", + "(Ljava/lang/ClassNotFoundException;)" + + "Ljava/lang/NoClassDefFoundError;"); + bytecode.addOpcode(ATHROW); + bytecode.write16bit(pc, bytecode.currentPc() - pc + 1); + } + + public void atArrayRead(ASTree array, ASTree index) + throws CompileError + { + arrayAccess(array, index); + bytecode.addOpcode(getArrayReadOp(exprType, arrayDim)); + } + + protected void arrayAccess(ASTree array, ASTree index) + throws CompileError + { + array.accept(this); + int type = exprType; + int dim = arrayDim; + if (dim == 0) + throw new CompileError("bad array access"); + + String cname = className; + + index.accept(this); + if (typePrecedence(exprType) != P_INT || arrayDim > 0) + throw new CompileError("bad array index"); + + exprType = type; + arrayDim = dim - 1; + className = cname; + } + + protected static int getArrayReadOp(int type, int dim) { + if (dim > 0) + return AALOAD; + + switch (type) { + case DOUBLE : + return DALOAD; + case FLOAT : + return FALOAD; + case LONG : + return LALOAD; + case INT : + return IALOAD; + case SHORT : + return SALOAD; + case CHAR : + return CALOAD; + case BYTE : + case BOOLEAN : + return BALOAD; + default : + return AALOAD; + } + } + + protected static int getArrayWriteOp(int type, int dim) { + if (dim > 0) + return AASTORE; + + switch (type) { + case DOUBLE : + return DASTORE; + case FLOAT : + return FASTORE; + case LONG : + return LASTORE; + case INT : + return IASTORE; + case SHORT : + return SASTORE; + case CHAR : + return CASTORE; + case BYTE : + case BOOLEAN : + return BASTORE; + default : + return AASTORE; + } + } + + private void atPlusPlus(int token, ASTree oprand, Expr expr, + boolean doDup) throws CompileError + { + boolean isPost = oprand == null; // ++i or i++? + if (isPost) + oprand = expr.oprand2(); + + if (oprand instanceof Variable) { + Declarator d = ((Variable)oprand).getDeclarator(); + int t = exprType = d.getType(); + arrayDim = d.getArrayDim(); + int var = getLocalVar(d); + if (arrayDim > 0) + badType(expr); + + if (t == DOUBLE) { + bytecode.addDload(var); + if (doDup && isPost) + bytecode.addOpcode(DUP2); + + bytecode.addDconst(1.0); + bytecode.addOpcode(token == PLUSPLUS ? DADD : DSUB); + if (doDup && !isPost) + bytecode.addOpcode(DUP2); + + bytecode.addDstore(var); + } + else if (t == LONG) { + bytecode.addLload(var); + if (doDup && isPost) + bytecode.addOpcode(DUP2); + + bytecode.addLconst((long)1); + bytecode.addOpcode(token == PLUSPLUS ? LADD : LSUB); + if (doDup && !isPost) + bytecode.addOpcode(DUP2); + + bytecode.addLstore(var); + } + else if (t == FLOAT) { + bytecode.addFload(var); + if (doDup && isPost) + bytecode.addOpcode(DUP); + + bytecode.addFconst(1.0f); + bytecode.addOpcode(token == PLUSPLUS ? FADD : FSUB); + if (doDup && !isPost) + bytecode.addOpcode(DUP); + + bytecode.addFstore(var); + } + else if (t == BYTE || t == CHAR || t == SHORT || t == INT) { + if (doDup && isPost) + bytecode.addIload(var); + + int delta = token == PLUSPLUS ? 1 : -1; + if (var > 0xff) { + bytecode.addOpcode(WIDE); + bytecode.addOpcode(IINC); + bytecode.addIndex(var); + bytecode.addIndex(delta); + } + else { + bytecode.addOpcode(IINC); + bytecode.add(var); + bytecode.add(delta); + } + + if (doDup && !isPost) + bytecode.addIload(var); + } + else + badType(expr); + } + else { + if (oprand instanceof Expr) { + Expr e = (Expr)oprand; + if (e.getOperator() == ARRAY) { + atArrayPlusPlus(token, isPost, e, doDup); + return; + } + } + + atFieldPlusPlus(token, isPost, oprand, expr, doDup); + } + } + + public void atArrayPlusPlus(int token, boolean isPost, + Expr expr, boolean doDup) throws CompileError + { + arrayAccess(expr.oprand1(), expr.oprand2()); + int t = exprType; + int dim = arrayDim; + if (dim > 0) + badType(expr); + + bytecode.addOpcode(DUP2); + bytecode.addOpcode(getArrayReadOp(t, arrayDim)); + int dup_code = is2word(t, dim) ? DUP2_X2 : DUP_X2; + atPlusPlusCore(dup_code, doDup, token, isPost, expr); + bytecode.addOpcode(getArrayWriteOp(t, dim)); + } + + protected void atPlusPlusCore(int dup_code, boolean doDup, + int token, boolean isPost, + Expr expr) throws CompileError + { + int t = exprType; + + if (doDup && isPost) + bytecode.addOpcode(dup_code); + + if (t == INT || t == BYTE || t == CHAR || t == SHORT) { + bytecode.addIconst(1); + bytecode.addOpcode(token == PLUSPLUS ? IADD : ISUB); + exprType = INT; + } + else if (t == LONG) { + bytecode.addLconst((long)1); + bytecode.addOpcode(token == PLUSPLUS ? LADD : LSUB); + } + else if (t == FLOAT) { + bytecode.addFconst(1.0f); + bytecode.addOpcode(token == PLUSPLUS ? FADD : FSUB); + } + else if (t == DOUBLE) { + bytecode.addDconst(1.0); + bytecode.addOpcode(token == PLUSPLUS ? DADD : DSUB); + } + else + badType(expr); + + if (doDup && !isPost) + bytecode.addOpcode(dup_code); + } + + protected abstract void atFieldPlusPlus(int token, boolean isPost, + ASTree oprand, Expr expr, boolean doDup) throws CompileError; + + public abstract void atMember(Member n) throws CompileError; + + public void atVariable(Variable v) throws CompileError { + Declarator d = v.getDeclarator(); + exprType = d.getType(); + arrayDim = d.getArrayDim(); + className = d.getClassName(); + int var = getLocalVar(d); + + if (arrayDim > 0) + bytecode.addAload(var); + else + switch (exprType) { + case CLASS : + bytecode.addAload(var); + break; + case LONG : + bytecode.addLload(var); + break; + case FLOAT : + bytecode.addFload(var); + break; + case DOUBLE : + bytecode.addDload(var); + break; + default : // BOOLEAN, BYTE, CHAR, SHORT, INT + bytecode.addIload(var); + break; + } + } + + public void atKeyword(Keyword k) throws CompileError { + arrayDim = 0; + int token = k.get(); + switch (token) { + case TRUE : + bytecode.addIconst(1); + exprType = BOOLEAN; + break; + case FALSE : + bytecode.addIconst(0); + exprType = BOOLEAN; + break; + case NULL : + bytecode.addOpcode(ACONST_NULL); + exprType = NULL; + break; + case THIS : + case SUPER : + if (inStaticMethod) + throw new CompileError("not-available: " + + (token == THIS ? "this" : "super")); + + bytecode.addAload(0); + exprType = CLASS; + if (token == THIS) + className = getThisName(); + else + className = getSuperName(); + break; + default : + fatal(); + } + } + + public void atStringL(StringL s) throws CompileError { + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangString; + bytecode.addLdc(s.get()); + } + + public void atIntConst(IntConst i) throws CompileError { + arrayDim = 0; + long value = i.get(); + int type = i.getType(); + if (type == IntConstant || type == CharConstant) { + exprType = (type == IntConstant ? INT : CHAR); + bytecode.addIconst((int)value); + } + else { + exprType = LONG; + bytecode.addLconst(value); + } + } + + public void atDoubleConst(DoubleConst d) throws CompileError { + arrayDim = 0; + if (d.getType() == DoubleConstant) { + exprType = DOUBLE; + bytecode.addDconst(d.get()); + } + else { + exprType = FLOAT; + bytecode.addFconst((float)d.get()); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java b/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java new file mode 100644 index 0000000..7944620 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java @@ -0,0 +1,53 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.NotFoundException; + +public class CompileError extends Exception { + private Lex lex; + private String reason; + + public CompileError(String s, Lex l) { + reason = s; + lex = l; + } + + public CompileError(String s) { + reason = s; + lex = null; + } + + public CompileError(CannotCompileException e) { + this(e.getReason()); + } + + public CompileError(NotFoundException e) { + this("cannot find " + e.getMessage()); + } + + public Lex getLex() { return lex; } + + public String getMessage() { + return reason; + } + + public String toString() { + return "compile error: " + reason; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java b/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java new file mode 100644 index 0000000..cfbeb4b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java @@ -0,0 +1,610 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtPrimitiveType; +import com.wenshuo.agent.javassist.CtMember; +import com.wenshuo.agent.javassist.CtField; +import com.wenshuo.agent.javassist.CtBehavior; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.CtConstructor; +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.bytecode.Bytecode; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.LocalVariableAttribute; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.Opcode; +import com.wenshuo.agent.javassist.NotFoundException; + +import com.wenshuo.agent.javassist.compiler.ast.*; + +public class Javac { + JvstCodeGen gen; + SymbolTable stable; + private Bytecode bytecode; + + public static final String param0Name = "$0"; + public static final String resultVarName = "$_"; + public static final String proceedName = "$proceed"; + + /** + * Constructs a compiler. + * + * @param thisClass the class that a compiled method/field + * belongs to. + */ + public Javac(CtClass thisClass) { + this(new Bytecode(thisClass.getClassFile2().getConstPool(), 0, 0), + thisClass); + } + + /** + * Constructs a compiler. + * The produced bytecode is stored in the Bytecode object + * specified by b. + * + * @param thisClass the class that a compiled method/field + * belongs to. + */ + public Javac(Bytecode b, CtClass thisClass) { + gen = new JvstCodeGen(b, thisClass, thisClass.getClassPool()); + stable = new SymbolTable(); + bytecode = b; + } + + /** + * Returns the produced bytecode. + */ + public Bytecode getBytecode() { return bytecode; } + + /** + * Compiles a method, constructor, or field declaration + * to a class. + * A field declaration can declare only one field. + * + *

In a method or constructor body, $0, $1, ... and $_ + * are not available. + * + * @return a CtMethod, CtConstructor, + * or CtField object. + * @see #recordProceed(String,String) + */ + public CtMember compile(String src) throws CompileError { + Parser p = new Parser(new Lex(src)); + ASTList mem = p.parseMember1(stable); + try { + if (mem instanceof FieldDecl) + return compileField((FieldDecl)mem); + else { + CtBehavior cb = compileMethod(p, (MethodDecl)mem); + CtClass decl = cb.getDeclaringClass(); + cb.getMethodInfo2() + .rebuildStackMapIf6(decl.getClassPool(), + decl.getClassFile2()); + return cb; + } + } + catch (BadBytecode bb) { + throw new CompileError(bb.getMessage()); + } + catch (CannotCompileException e) { + throw new CompileError(e.getMessage()); + } + } + + public static class CtFieldWithInit extends CtField { + private ASTree init; + + CtFieldWithInit(CtClass type, String name, CtClass declaring) + throws CannotCompileException + { + super(type, name, declaring); + init = null; + } + + protected void setInit(ASTree i) { init = i; } + + protected ASTree getInitAST() { + return init; + } + } + + private CtField compileField(FieldDecl fd) + throws CompileError, CannotCompileException + { + CtFieldWithInit f; + Declarator d = fd.getDeclarator(); + f = new CtFieldWithInit(gen.resolver.lookupClass(d), + d.getVariable().get(), gen.getThisClass()); + f.setModifiers(MemberResolver.getModifiers(fd.getModifiers())); + if (fd.getInit() != null) + f.setInit(fd.getInit()); + + return f; + } + + private CtBehavior compileMethod(Parser p, MethodDecl md) + throws CompileError + { + int mod = MemberResolver.getModifiers(md.getModifiers()); + CtClass[] plist = gen.makeParamList(md); + CtClass[] tlist = gen.makeThrowsList(md); + recordParams(plist, Modifier.isStatic(mod)); + md = p.parseMethod2(stable, md); + try { + if (md.isConstructor()) { + CtConstructor cons = new CtConstructor(plist, + gen.getThisClass()); + cons.setModifiers(mod); + md.accept(gen); + cons.getMethodInfo().setCodeAttribute( + bytecode.toCodeAttribute()); + cons.setExceptionTypes(tlist); + return cons; + } + else { + Declarator r = md.getReturn(); + CtClass rtype = gen.resolver.lookupClass(r); + recordReturnType(rtype, false); + CtMethod method = new CtMethod(rtype, r.getVariable().get(), + plist, gen.getThisClass()); + method.setModifiers(mod); + gen.setThisMethod(method); + md.accept(gen); + if (md.getBody() != null) + method.getMethodInfo().setCodeAttribute( + bytecode.toCodeAttribute()); + else + method.setModifiers(mod | Modifier.ABSTRACT); + + method.setExceptionTypes(tlist); + return method; + } + } + catch (NotFoundException e) { + throw new CompileError(e.toString()); + } + } + + /** + * Compiles a method (or constructor) body. + * + * @param src a single statement or a block. + * If null, this method produces a body returning zero or null. + */ + public Bytecode compileBody(CtBehavior method, String src) + throws CompileError + { + try { + int mod = method.getModifiers(); + recordParams(method.getParameterTypes(), Modifier.isStatic(mod)); + + CtClass rtype; + if (method instanceof CtMethod) { + gen.setThisMethod((CtMethod)method); + rtype = ((CtMethod)method).getReturnType(); + } + else + rtype = CtClass.voidType; + + recordReturnType(rtype, false); + boolean isVoid = rtype == CtClass.voidType; + + if (src == null) + makeDefaultBody(bytecode, rtype); + else { + Parser p = new Parser(new Lex(src)); + SymbolTable stb = new SymbolTable(stable); + Stmnt s = p.parseStatement(stb); + if (p.hasMore()) + throw new CompileError( + "the method/constructor body must be surrounded by {}"); + + boolean callSuper = false; + if (method instanceof CtConstructor) + callSuper = !((CtConstructor)method).isClassInitializer(); + + gen.atMethodBody(s, callSuper, isVoid); + } + + return bytecode; + } + catch (NotFoundException e) { + throw new CompileError(e.toString()); + } + } + + private static void makeDefaultBody(Bytecode b, CtClass type) { + int op; + int value; + if (type instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)type; + op = pt.getReturnOp(); + if (op == Opcode.DRETURN) + value = Opcode.DCONST_0; + else if (op == Opcode.FRETURN) + value = Opcode.FCONST_0; + else if (op == Opcode.LRETURN) + value = Opcode.LCONST_0; + else if (op == Opcode.RETURN) + value = Opcode.NOP; + else + value = Opcode.ICONST_0; + } + else { + op = Opcode.ARETURN; + value = Opcode.ACONST_NULL; + } + + if (value != Opcode.NOP) + b.addOpcode(value); + + b.addOpcode(op); + } + + /** + * Records local variables available at the specified program counter. + * If the LocalVariableAttribute is not available, this method does not + * record any local variable. It only returns false. + * + * @param pc program counter (>= 0) + * @return false if the CodeAttribute does not include a + * LocalVariableAttribute. + */ + public boolean recordLocalVariables(CodeAttribute ca, int pc) + throws CompileError + { + LocalVariableAttribute va + = (LocalVariableAttribute) + ca.getAttribute(LocalVariableAttribute.tag); + if (va == null) + return false; + + int n = va.tableLength(); + for (int i = 0; i < n; ++i) { + int start = va.startPc(i); + int len = va.codeLength(i); + if (start <= pc && pc < start + len) + gen.recordVariable(va.descriptor(i), va.variableName(i), + va.index(i), stable); + } + + return true; + } + + /** + * Records parameter names if the LocalVariableAttribute is available. + * It returns false unless the LocalVariableAttribute is available. + * + * @param numOfLocalVars the number of local variables used + * for storing the parameters. + * @return false if the CodeAttribute does not include a + * LocalVariableAttribute. + */ + public boolean recordParamNames(CodeAttribute ca, int numOfLocalVars) + throws CompileError + { + LocalVariableAttribute va + = (LocalVariableAttribute) + ca.getAttribute(LocalVariableAttribute.tag); + if (va == null) + return false; + + int n = va.tableLength(); + for (int i = 0; i < n; ++i) { + int index = va.index(i); + if (index < numOfLocalVars) + gen.recordVariable(va.descriptor(i), va.variableName(i), + index, stable); + } + + return true; + } + + + /** + * Makes variables $0 (this), $1, $2, ..., and $args represent method + * parameters. $args represents an array of all the parameters. + * It also makes $$ available as a parameter list of method call. + * + *

This must be called before calling compileStmnt() and + * compileExpr(). The correct value of + * isStatic must be recorded before compilation. + * maxLocals is updated to include $0,... + */ + public int recordParams(CtClass[] params, boolean isStatic) + throws CompileError + { + return gen.recordParams(params, isStatic, "$", "$args", "$$", stable); + } + + /** + * Makes variables $0, $1, $2, ..., and $args represent method + * parameters. $args represents an array of all the parameters. + * It also makes $$ available as a parameter list of method call. + * $0 can represent a local variable other than THIS (variable 0). + * $class is also made available. + * + *

This must be called before calling compileStmnt() and + * compileExpr(). The correct value of + * isStatic must be recorded before compilation. + * maxLocals is updated to include $0,... + * + * @param use0 true if $0 is used. + * @param varNo the register number of $0 (use0 is true) + * or $1 (otherwise). + * @param target the type of $0 (it can be null if use0 is false). + * It is used as the name of the type represented + * by $class. + * @param isStatic true if the method in which the compiled bytecode + * is embedded is static. + */ + public int recordParams(String target, CtClass[] params, + boolean use0, int varNo, boolean isStatic) + throws CompileError + { + return gen.recordParams(params, isStatic, "$", "$args", "$$", + use0, varNo, target, stable); + } + + /** + * Sets maxLocals to max. + * This method tells the compiler the local variables that have been + * allocated for the rest of the code. When the compiler needs + * new local variables, the local variables at the index max, + * max + 1, ... are assigned. + * + *

This method is indirectly called by recordParams. + */ + public void setMaxLocals(int max) { + gen.setMaxLocals(max); + } + + /** + * Prepares to use cast $r, $w, $_, and $type. + * $type is made to represent the specified return type. + * It also enables to write a return statement with a return value + * for void method. + * + *

If the return type is void, ($r) does nothing. + * The type of $_ is java.lang.Object. + * + * @param type the return type. + * @param useResultVar true if $_ is used. + * @return -1 or the variable index assigned to $_. + * @see #recordType(CtClass) + */ + public int recordReturnType(CtClass type, boolean useResultVar) + throws CompileError + { + gen.recordType(type); + return gen.recordReturnType(type, "$r", + (useResultVar ? resultVarName : null), stable); + } + + /** + * Prepares to use $type. Note that recordReturnType() overwrites + * the value of $type. + * + * @param t the type represented by $type. + */ + public void recordType(CtClass t) { + gen.recordType(t); + } + + /** + * Makes the given variable available. + * + * @param type variable type + * @param name variable name + */ + public int recordVariable(CtClass type, String name) + throws CompileError + { + return gen.recordVariable(type, name, stable); + } + + /** + * Prepares to use $proceed(). + * If the return type of $proceed() is void, null is pushed on the + * stack. + * + * @param target an expression specifying the target object. + * if null, "this" is the target. + * @param method the method name. + */ + public void recordProceed(String target, String method) + throws CompileError + { + Parser p = new Parser(new Lex(target)); + final ASTree texpr = p.parseExpression(stable); + final String m = method; + + ProceedHandler h = new ProceedHandler() { + public void doit(JvstCodeGen gen, Bytecode b, ASTList args) + throws CompileError + { + ASTree expr = new Member(m); + if (texpr != null) + expr = Expr.make('.', texpr, expr); + + expr = CallExpr.makeCall(expr, args); + gen.compileExpr(expr); + gen.addNullIfVoid(); + } + + public void setReturnType(JvstTypeChecker check, ASTList args) + throws CompileError + { + ASTree expr = new Member(m); + if (texpr != null) + expr = Expr.make('.', texpr, expr); + + expr = CallExpr.makeCall(expr, args); + expr.accept(check); + check.addNullIfVoid(); + } + }; + + gen.setProceedHandler(h, proceedName); + } + + /** + * Prepares to use $proceed() representing a static method. + * If the return type of $proceed() is void, null is pushed on the + * stack. + * + * @param targetClass the fully-qualified dot-separated name + * of the class declaring the method. + * @param method the method name. + */ + public void recordStaticProceed(String targetClass, String method) + throws CompileError + { + final String c = targetClass; + final String m = method; + + ProceedHandler h = new ProceedHandler() { + public void doit(JvstCodeGen gen, Bytecode b, ASTList args) + throws CompileError + { + Expr expr = Expr.make(TokenId.MEMBER, + new Symbol(c), new Member(m)); + expr = CallExpr.makeCall(expr, args); + gen.compileExpr(expr); + gen.addNullIfVoid(); + } + + public void setReturnType(JvstTypeChecker check, ASTList args) + throws CompileError + { + Expr expr = Expr.make(TokenId.MEMBER, + new Symbol(c), new Member(m)); + expr = CallExpr.makeCall(expr, args); + expr.accept(check); + check.addNullIfVoid(); + } + }; + + gen.setProceedHandler(h, proceedName); + } + + /** + * Prepares to use $proceed() representing a private/super's method. + * If the return type of $proceed() is void, null is pushed on the + * stack. This method is for methods invoked by INVOKESPECIAL. + * + * @param target an expression specifying the target object. + * if null, "this" is the target. + * @param classname the class name declaring the method. + * @param methodname the method name. + * @param descriptor the method descriptor. + */ + public void recordSpecialProceed(String target, String classname, + String methodname, String descriptor) + throws CompileError + { + Parser p = new Parser(new Lex(target)); + final ASTree texpr = p.parseExpression(stable); + final String cname = classname; + final String method = methodname; + final String desc = descriptor; + + ProceedHandler h = new ProceedHandler() { + public void doit(JvstCodeGen gen, Bytecode b, ASTList args) + throws CompileError + { + gen.compileInvokeSpecial(texpr, cname, method, desc, args); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.compileInvokeSpecial(texpr, cname, method, desc, args); + } + + }; + + gen.setProceedHandler(h, proceedName); + } + + /** + * Prepares to use $proceed(). + */ + public void recordProceed(ProceedHandler h) { + gen.setProceedHandler(h, proceedName); + } + + /** + * Compiles a statement (or a block). + * recordParams() must be called before invoking + * this method. + * + *

Local variables that are not declared + * in the compiled source text might not be accessible within that + * source text. Fields and method parameters ($0, $1, ..) are available. + */ + public void compileStmnt(String src) throws CompileError { + Parser p = new Parser(new Lex(src)); + SymbolTable stb = new SymbolTable(stable); + while (p.hasMore()) { + Stmnt s = p.parseStatement(stb); + if (s != null) + s.accept(gen); + } + } + + /** + * Compiles an exression. recordParams() must be + * called before invoking this method. + * + *

Local variables are not accessible + * within the compiled source text. Fields and method parameters + * ($0, $1, ..) are available if recordParams() + * have been invoked. + */ + public void compileExpr(String src) throws CompileError { + ASTree e = parseExpr(src, stable); + compileExpr(e); + } + + /** + * Parsers an expression. + */ + public static ASTree parseExpr(String src, SymbolTable st) + throws CompileError + { + Parser p = new Parser(new Lex(src)); + return p.parseExpression(st); + } + + /** + * Compiles an exression. recordParams() must be + * called before invoking this method. + * + *

Local variables are not accessible + * within the compiled source text. Fields and method parameters + * ($0, $1, ..) are available if recordParams() + * have been invoked. + */ + public void compileExpr(ASTree e) throws CompileError { + if (e != null) + gen.compileExpr(e); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java b/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java new file mode 100644 index 0000000..7eb03ab --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java @@ -0,0 +1,710 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.ast.*; + +/* Code generator accepting extended Java syntax for Javassist. + */ + +public class JvstCodeGen extends MemberCodeGen { + String paramArrayName = null; + String paramListName = null; + CtClass[] paramTypeList = null; + private int paramVarBase = 0; // variable index for $0 or $1. + private boolean useParam0 = false; // true if $0 is used. + private String param0Type = null; // JVM name + public static final String sigName = "$sig"; + public static final String dollarTypeName = "$type"; + public static final String clazzName = "$class"; + private CtClass dollarType = null; + CtClass returnType = null; + String returnCastName = null; + private String returnVarName = null; // null if $_ is not used. + public static final String wrapperCastName = "$w"; + String proceedName = null; + public static final String cflowName = "$cflow"; + ProceedHandler procHandler = null; // null if not used. + + public JvstCodeGen(Bytecode b, CtClass cc, ClassPool cp) { + super(b, cc, cp); + setTypeChecker(new JvstTypeChecker(cc, cp, this)); + } + + /* Index of $1. + */ + private int indexOfParam1() { + return paramVarBase + (useParam0 ? 1 : 0); + } + + /* Records a ProceedHandler obejct. + * + * @param name the name of the special method call. + * it is usually $proceed. + */ + public void setProceedHandler(ProceedHandler h, String name) { + proceedName = name; + procHandler = h; + } + + /* If the type of the expression compiled last is void, + * add ACONST_NULL and change exprType, arrayDim, className. + */ + public void addNullIfVoid() { + if (exprType == VOID) { + bytecode.addOpcode(ACONST_NULL); + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangObject; + } + } + + /* To support $args, $sig, and $type. + * $args is an array of parameter list. + */ + public void atMember(Member mem) throws CompileError { + String name = mem.get(); + if (name.equals(paramArrayName)) { + compileParameterList(bytecode, paramTypeList, indexOfParam1()); + exprType = CLASS; + arrayDim = 1; + className = jvmJavaLangObject; + } + else if (name.equals(sigName)) { + bytecode.addLdc(Descriptor.ofMethod(returnType, paramTypeList)); + bytecode.addInvokestatic("javassist/runtime/Desc", "getParams", + "(Ljava/lang/String;)[Ljava/lang/Class;"); + exprType = CLASS; + arrayDim = 1; + className = "java/lang/Class"; + } + else if (name.equals(dollarTypeName)) { + if (dollarType == null) + throw new CompileError(dollarTypeName + " is not available"); + + bytecode.addLdc(Descriptor.of(dollarType)); + callGetType("getType"); + } + else if (name.equals(clazzName)) { + if (param0Type == null) + throw new CompileError(clazzName + " is not available"); + + bytecode.addLdc(param0Type); + callGetType("getClazz"); + } + else + super.atMember(mem); + } + + private void callGetType(String method) { + bytecode.addInvokestatic("javassist/runtime/Desc", method, + "(Ljava/lang/String;)Ljava/lang/Class;"); + exprType = CLASS; + arrayDim = 0; + className = "java/lang/Class"; + } + + protected void atFieldAssign(Expr expr, int op, ASTree left, + ASTree right, boolean doDup) throws CompileError + { + if (left instanceof Member + && ((Member)left).get().equals(paramArrayName)) { + if (op != '=') + throw new CompileError("bad operator for " + paramArrayName); + + right.accept(this); + if (arrayDim != 1 || exprType != CLASS) + throw new CompileError("invalid type for " + paramArrayName); + + atAssignParamList(paramTypeList, bytecode); + if (!doDup) + bytecode.addOpcode(POP); + } + else + super.atFieldAssign(expr, op, left, right, doDup); + } + + protected void atAssignParamList(CtClass[] params, Bytecode code) + throws CompileError + { + if (params == null) + return; + + int varNo = indexOfParam1(); + int n = params.length; + for (int i = 0; i < n; ++i) { + code.addOpcode(DUP); + code.addIconst(i); + code.addOpcode(AALOAD); + compileUnwrapValue(params[i], code); + code.addStore(varNo, params[i]); + varNo += is2word(exprType, arrayDim) ? 2 : 1; + } + } + + public void atCastExpr(CastExpr expr) throws CompileError { + ASTList classname = expr.getClassName(); + if (classname != null && expr.getArrayDim() == 0) { + ASTree p = classname.head(); + if (p instanceof Symbol && classname.tail() == null) { + String typename = ((Symbol)p).get(); + if (typename.equals(returnCastName)) { + atCastToRtype(expr); + return; + } + else if (typename.equals(wrapperCastName)) { + atCastToWrapper(expr); + return; + } + } + } + + super.atCastExpr(expr); + } + + /** + * Inserts a cast operator to the return type. + * If the return type is void, this does nothing. + */ + protected void atCastToRtype(CastExpr expr) throws CompileError { + expr.getOprand().accept(this); + if (exprType == VOID || isRefType(exprType) || arrayDim > 0) + compileUnwrapValue(returnType, bytecode); + else if (returnType instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)returnType; + int destType = MemberResolver.descToType(pt.getDescriptor()); + atNumCastExpr(exprType, destType); + exprType = destType; + arrayDim = 0; + className = null; + } + else + throw new CompileError("invalid cast"); + } + + protected void atCastToWrapper(CastExpr expr) throws CompileError { + expr.getOprand().accept(this); + if (isRefType(exprType) || arrayDim > 0) + return; // Object type. do nothing. + + CtClass clazz = resolver.lookupClass(exprType, arrayDim, className); + if (clazz instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)clazz; + String wrapper = pt.getWrapperName(); + bytecode.addNew(wrapper); // new + bytecode.addOpcode(DUP); // dup + if (pt.getDataSize() > 1) + bytecode.addOpcode(DUP2_X2); // dup2_x2 + else + bytecode.addOpcode(DUP2_X1); // dup2_x1 + + bytecode.addOpcode(POP2); // pop2 + bytecode.addInvokespecial(wrapper, "", + "(" + pt.getDescriptor() + ")V"); + // invokespecial + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangObject; + } + } + + /* Delegates to a ProcHandler object if the method call is + * $proceed(). It may process $cflow(). + */ + public void atCallExpr(CallExpr expr) throws CompileError { + ASTree method = expr.oprand1(); + if (method instanceof Member) { + String name = ((Member)method).get(); + if (procHandler != null && name.equals(proceedName)) { + procHandler.doit(this, bytecode, (ASTList)expr.oprand2()); + return; + } + else if (name.equals(cflowName)) { + atCflow((ASTList)expr.oprand2()); + return; + } + } + + super.atCallExpr(expr); + } + + /* To support $cflow(). + */ + protected void atCflow(ASTList cname) throws CompileError { + StringBuffer sbuf = new StringBuffer(); + if (cname == null || cname.tail() != null) + throw new CompileError("bad " + cflowName); + + makeCflowName(sbuf, cname.head()); + String name = sbuf.toString(); + Object[] names = resolver.getClassPool().lookupCflow(name); + if (names == null) + throw new CompileError("no such " + cflowName + ": " + name); + + bytecode.addGetstatic((String)names[0], (String)names[1], + "Ljavassist/runtime/Cflow;"); + bytecode.addInvokevirtual("javassist.runtime.Cflow", + "value", "()I"); + exprType = INT; + arrayDim = 0; + className = null; + } + + /* Syntax: + * + * : $cflow '(' ')' + * : ('.' )* + */ + private static void makeCflowName(StringBuffer sbuf, ASTree name) + throws CompileError + { + if (name instanceof Symbol) { + sbuf.append(((Symbol)name).get()); + return; + } + else if (name instanceof Expr) { + Expr expr = (Expr)name; + if (expr.getOperator() == '.') { + makeCflowName(sbuf, expr.oprand1()); + sbuf.append('.'); + makeCflowName(sbuf, expr.oprand2()); + return; + } + } + + throw new CompileError("bad " + cflowName); + } + + /* To support $$. ($$) is equivalent to ($1, ..., $n). + * It can be used only as a parameter list of method call. + */ + public boolean isParamListName(ASTList args) { + if (paramTypeList != null + && args != null && args.tail() == null) { + ASTree left = args.head(); + return (left instanceof Member + && ((Member)left).get().equals(paramListName)); + } + else + return false; + } + + /* + public int getMethodArgsLength(ASTList args) { + if (!isParamListName(args)) + return super.getMethodArgsLength(args); + + return paramTypeList.length; + } + */ + + public int getMethodArgsLength(ASTList args) { + String pname = paramListName; + int n = 0; + while (args != null) { + ASTree a = args.head(); + if (a instanceof Member && ((Member)a).get().equals(pname)) { + if (paramTypeList != null) + n += paramTypeList.length; + } + else + ++n; + + args = args.tail(); + } + + return n; + } + + public void atMethodArgs(ASTList args, int[] types, int[] dims, + String[] cnames) throws CompileError { + CtClass[] params = paramTypeList; + String pname = paramListName; + int i = 0; + while (args != null) { + ASTree a = args.head(); + if (a instanceof Member && ((Member)a).get().equals(pname)) { + if (params != null) { + int n = params.length; + int regno = indexOfParam1(); + for (int k = 0; k < n; ++k) { + CtClass p = params[k]; + regno += bytecode.addLoad(regno, p); + setType(p); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + } + } + } + else { + a.accept(this); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + } + + args = args.tail(); + } + } + + /* + public void atMethodArgs(ASTList args, int[] types, int[] dims, + String[] cnames) throws CompileError { + if (!isParamListName(args)) { + super.atMethodArgs(args, types, dims, cnames); + return; + } + + CtClass[] params = paramTypeList; + if (params == null) + return; + + int n = params.length; + int regno = indexOfParam1(); + for (int i = 0; i < n; ++i) { + CtClass p = params[i]; + regno += bytecode.addLoad(regno, p); + setType(p); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + } + } + */ + + /* called by Javac#recordSpecialProceed(). + */ + void compileInvokeSpecial(ASTree target, String classname, + String methodname, String descriptor, + ASTList args) + throws CompileError + { + target.accept(this); + int nargs = getMethodArgsLength(args); + atMethodArgs(args, new int[nargs], new int[nargs], + new String[nargs]); + bytecode.addInvokespecial(classname, methodname, descriptor); + setReturnType(descriptor, false, false); + addNullIfVoid(); + } + + /* + * Makes it valid to write "return ;" for a void method. + */ + protected void atReturnStmnt(Stmnt st) throws CompileError { + ASTree result = st.getLeft(); + if (result != null && returnType == CtClass.voidType) { + compileExpr(result); + if (is2word(exprType, arrayDim)) + bytecode.addOpcode(POP2); + else if (exprType != VOID) + bytecode.addOpcode(POP); + + result = null; + } + + atReturnStmnt2(result); + } + + /** + * Makes a cast to the return type ($r) available. + * It also enables $_. + * + *

If the return type is void, ($r) does nothing. + * The type of $_ is java.lang.Object. + * + * @param resultName null if $_ is not used. + * @return -1 or the variable index assigned to $_. + */ + public int recordReturnType(CtClass type, String castName, + String resultName, SymbolTable tbl) throws CompileError + { + returnType = type; + returnCastName = castName; + returnVarName = resultName; + if (resultName == null) + return -1; + else { + int varNo = getMaxLocals(); + int locals = varNo + recordVar(type, resultName, varNo, tbl); + setMaxLocals(locals); + return varNo; + } + } + + /** + * Makes $type available. + */ + public void recordType(CtClass t) { + dollarType = t; + } + + /** + * Makes method parameters $0, $1, ..., $args, $$, and $class available. + * $0 is equivalent to THIS if the method is not static. Otherwise, + * if the method is static, then $0 is not available. + */ + public int recordParams(CtClass[] params, boolean isStatic, + String prefix, String paramVarName, + String paramsName, SymbolTable tbl) + throws CompileError + { + return recordParams(params, isStatic, prefix, paramVarName, + paramsName, !isStatic, 0, getThisName(), tbl); + } + + /** + * Makes method parameters $0, $1, ..., $args, $$, and $class available. + * $0 is available only if use0 is true. It might not be equivalent + * to THIS. + * + * @param params the parameter types (the types of $1, $2, ..) + * @param prefix it must be "$" (the first letter of $0, $1, ...) + * @param paramVarName it must be "$args" + * @param paramsName it must be "$$" + * @param use0 true if $0 is used. + * @param paramBase the register number of $0 (use0 is true) + * or $1 (otherwise). + * @param target the class of $0. If use0 is false, target + * can be null. The value of "target" is also used + * as the name of the type represented by $class. + * @param isStatic true if the method in which the compiled bytecode + * is embedded is static. + */ + public int recordParams(CtClass[] params, boolean isStatic, + String prefix, String paramVarName, + String paramsName, boolean use0, + int paramBase, String target, + SymbolTable tbl) + throws CompileError + { + int varNo; + + paramTypeList = params; + paramArrayName = paramVarName; + paramListName = paramsName; + paramVarBase = paramBase; + useParam0 = use0; + + if (target != null) + param0Type = MemberResolver.jvmToJavaName(target); + + inStaticMethod = isStatic; + varNo = paramBase; + if (use0) { + String varName = prefix + "0"; + Declarator decl + = new Declarator(CLASS, MemberResolver.javaToJvmName(target), + 0, varNo++, new Symbol(varName)); + tbl.append(varName, decl); + } + + for (int i = 0; i < params.length; ++i) + varNo += recordVar(params[i], prefix + (i + 1), varNo, tbl); + + if (getMaxLocals() < varNo) + setMaxLocals(varNo); + + return varNo; + } + + /** + * Makes the given variable name available. + * + * @param type variable type + * @param varName variable name + */ + public int recordVariable(CtClass type, String varName, SymbolTable tbl) + throws CompileError + { + if (varName == null) + return -1; + else { + int varNo = getMaxLocals(); + int locals = varNo + recordVar(type, varName, varNo, tbl); + setMaxLocals(locals); + return varNo; + } + } + + private int recordVar(CtClass cc, String varName, int varNo, + SymbolTable tbl) throws CompileError + { + if (cc == CtClass.voidType) { + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangObject; + } + else + setType(cc); + + Declarator decl + = new Declarator(exprType, className, arrayDim, + varNo, new Symbol(varName)); + tbl.append(varName, decl); + return is2word(exprType, arrayDim) ? 2 : 1; + } + + /** + * Makes the given variable name available. + * + * @param typeDesc the type descriptor of the variable + * @param varName variable name + * @param varNo an index into the local variable array + */ + public void recordVariable(String typeDesc, String varName, int varNo, + SymbolTable tbl) throws CompileError + { + char c; + int dim = 0; + while ((c = typeDesc.charAt(dim)) == '[') + ++dim; + + int type = MemberResolver.descToType(c); + String cname = null; + if (type == CLASS) { + if (dim == 0) + cname = typeDesc.substring(1, typeDesc.length() - 1); + else + cname = typeDesc.substring(dim + 1, typeDesc.length() - 1); + } + + Declarator decl + = new Declarator(type, cname, dim, varNo, new Symbol(varName)); + tbl.append(varName, decl); + } + + /* compileParameterList() returns the stack size used + * by the produced code. + * + * This method correctly computes the max_stack value. + * + * @param regno the index of the local variable in which + * the first argument is received. + * (0: static method, 1: regular method.) + */ + public static int compileParameterList(Bytecode code, + CtClass[] params, int regno) { + if (params == null) { + code.addIconst(0); // iconst_0 + code.addAnewarray(javaLangObject); // anewarray Object + return 1; + } + else { + CtClass[] args = new CtClass[1]; + int n = params.length; + code.addIconst(n); // iconst_ + code.addAnewarray(javaLangObject); // anewarray Object + for (int i = 0; i < n; ++i) { + code.addOpcode(Bytecode.DUP); // dup + code.addIconst(i); // iconst_ + if (params[i].isPrimitive()) { + CtPrimitiveType pt = (CtPrimitiveType)params[i]; + String wrapper = pt.getWrapperName(); + code.addNew(wrapper); // new + code.addOpcode(Bytecode.DUP); // dup + int s = code.addLoad(regno, pt); // ?load + regno += s; + args[0] = pt; + code.addInvokespecial(wrapper, "", + Descriptor.ofMethod(CtClass.voidType, args)); + // invokespecial + } + else { + code.addAload(regno); // aload + ++regno; + } + + code.addOpcode(Bytecode.AASTORE); // aastore + } + + return 8; + } + } + + protected void compileUnwrapValue(CtClass type, Bytecode code) + throws CompileError + { + if (type == CtClass.voidType) { + addNullIfVoid(); + return; + } + + if (exprType == VOID) + throw new CompileError("invalid type for " + returnCastName); + + if (type instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)type; + // pt is not voidType. + String wrapper = pt.getWrapperName(); + code.addCheckcast(wrapper); + code.addInvokevirtual(wrapper, pt.getGetMethodName(), + pt.getGetMethodDescriptor()); + setType(type); + } + else { + code.addCheckcast(type); + setType(type); + } + } + + /* Sets exprType, arrayDim, and className; + * If type is void, then this method does nothing. + */ + public void setType(CtClass type) throws CompileError { + setType(type, 0); + } + + private void setType(CtClass type, int dim) throws CompileError { + if (type.isPrimitive()) { + CtPrimitiveType pt = (CtPrimitiveType)type; + exprType = MemberResolver.descToType(pt.getDescriptor()); + arrayDim = dim; + className = null; + } + else if (type.isArray()) + try { + setType(type.getComponentType(), dim + 1); + } + catch (NotFoundException e) { + throw new CompileError("undefined type: " + type.getName()); + } + else { + exprType = CLASS; + arrayDim = dim; + className = MemberResolver.javaToJvmName(type.getName()); + } + } + + /* Performs implicit coercion from exprType to type. + */ + public void doNumCast(CtClass type) throws CompileError { + if (arrayDim == 0 && !isRefType(exprType)) + if (type instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)type; + atNumCastExpr(exprType, + MemberResolver.descToType(pt.getDescriptor())); + } + else + throw new CompileError("type mismatch"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java b/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java new file mode 100644 index 0000000..a28aaad --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java @@ -0,0 +1,282 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.compiler.ast.*; + +/* Type checker accepting extended Java syntax for Javassist. + */ + +public class JvstTypeChecker extends TypeChecker { + private JvstCodeGen codeGen; + + public JvstTypeChecker(CtClass cc, ClassPool cp, JvstCodeGen gen) { + super(cc, cp); + codeGen = gen; + } + + /* If the type of the expression compiled last is void, + * add ACONST_NULL and change exprType, arrayDim, className. + */ + public void addNullIfVoid() { + if (exprType == VOID) { + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangObject; + } + } + + /* To support $args, $sig, and $type. + * $args is an array of parameter list. + */ + public void atMember(Member mem) throws CompileError { + String name = mem.get(); + if (name.equals(codeGen.paramArrayName)) { + exprType = CLASS; + arrayDim = 1; + className = jvmJavaLangObject; + } + else if (name.equals(JvstCodeGen.sigName)) { + exprType = CLASS; + arrayDim = 1; + className = "java/lang/Class"; + } + else if (name.equals(JvstCodeGen.dollarTypeName) + || name.equals(JvstCodeGen.clazzName)) { + exprType = CLASS; + arrayDim = 0; + className = "java/lang/Class"; + } + else + super.atMember(mem); + } + + protected void atFieldAssign(Expr expr, int op, ASTree left, ASTree right) + throws CompileError + { + if (left instanceof Member + && ((Member)left).get().equals(codeGen.paramArrayName)) { + right.accept(this); + CtClass[] params = codeGen.paramTypeList; + if (params == null) + return; + + int n = params.length; + for (int i = 0; i < n; ++i) + compileUnwrapValue(params[i]); + } + else + super.atFieldAssign(expr, op, left, right); + } + + public void atCastExpr(CastExpr expr) throws CompileError { + ASTList classname = expr.getClassName(); + if (classname != null && expr.getArrayDim() == 0) { + ASTree p = classname.head(); + if (p instanceof Symbol && classname.tail() == null) { + String typename = ((Symbol)p).get(); + if (typename.equals(codeGen.returnCastName)) { + atCastToRtype(expr); + return; + } + else if (typename.equals(JvstCodeGen.wrapperCastName)) { + atCastToWrapper(expr); + return; + } + } + } + + super.atCastExpr(expr); + } + + /** + * Inserts a cast operator to the return type. + * If the return type is void, this does nothing. + */ + protected void atCastToRtype(CastExpr expr) throws CompileError { + CtClass returnType = codeGen.returnType; + expr.getOprand().accept(this); + if (exprType == VOID || CodeGen.isRefType(exprType) || arrayDim > 0) + compileUnwrapValue(returnType); + else if (returnType instanceof CtPrimitiveType) { + CtPrimitiveType pt = (CtPrimitiveType)returnType; + int destType = MemberResolver.descToType(pt.getDescriptor()); + exprType = destType; + arrayDim = 0; + className = null; + } + } + + protected void atCastToWrapper(CastExpr expr) throws CompileError { + expr.getOprand().accept(this); + if (CodeGen.isRefType(exprType) || arrayDim > 0) + return; // Object type. do nothing. + + CtClass clazz = resolver.lookupClass(exprType, arrayDim, className); + if (clazz instanceof CtPrimitiveType) { + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangObject; + } + } + + /* Delegates to a ProcHandler object if the method call is + * $proceed(). It may process $cflow(). + */ + public void atCallExpr(CallExpr expr) throws CompileError { + ASTree method = expr.oprand1(); + if (method instanceof Member) { + String name = ((Member)method).get(); + if (codeGen.procHandler != null + && name.equals(codeGen.proceedName)) { + codeGen.procHandler.setReturnType(this, + (ASTList)expr.oprand2()); + return; + } + else if (name.equals(JvstCodeGen.cflowName)) { + atCflow((ASTList)expr.oprand2()); + return; + } + } + + super.atCallExpr(expr); + } + + /* To support $cflow(). + */ + protected void atCflow(ASTList cname) throws CompileError { + exprType = INT; + arrayDim = 0; + className = null; + } + + /* To support $$. ($$) is equivalent to ($1, ..., $n). + * It can be used only as a parameter list of method call. + */ + public boolean isParamListName(ASTList args) { + if (codeGen.paramTypeList != null + && args != null && args.tail() == null) { + ASTree left = args.head(); + return (left instanceof Member + && ((Member)left).get().equals(codeGen.paramListName)); + } + else + return false; + } + + public int getMethodArgsLength(ASTList args) { + String pname = codeGen.paramListName; + int n = 0; + while (args != null) { + ASTree a = args.head(); + if (a instanceof Member && ((Member)a).get().equals(pname)) { + if (codeGen.paramTypeList != null) + n += codeGen.paramTypeList.length; + } + else + ++n; + + args = args.tail(); + } + + return n; + } + + public void atMethodArgs(ASTList args, int[] types, int[] dims, + String[] cnames) throws CompileError { + CtClass[] params = codeGen.paramTypeList; + String pname = codeGen.paramListName; + int i = 0; + while (args != null) { + ASTree a = args.head(); + if (a instanceof Member && ((Member)a).get().equals(pname)) { + if (params != null) { + int n = params.length; + for (int k = 0; k < n; ++k) { + CtClass p = params[k]; + setType(p); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + } + } + } + else { + a.accept(this); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + } + + args = args.tail(); + } + } + + /* called by Javac#recordSpecialProceed(). + */ + void compileInvokeSpecial(ASTree target, String classname, + String methodname, String descriptor, + ASTList args) + throws CompileError + { + target.accept(this); + int nargs = getMethodArgsLength(args); + atMethodArgs(args, new int[nargs], new int[nargs], + new String[nargs]); + setReturnType(descriptor); + addNullIfVoid(); + } + + protected void compileUnwrapValue(CtClass type) throws CompileError + { + if (type == CtClass.voidType) + addNullIfVoid(); + else + setType(type); + } + + /* Sets exprType, arrayDim, and className; + * If type is void, then this method does nothing. + */ + public void setType(CtClass type) throws CompileError { + setType(type, 0); + } + + private void setType(CtClass type, int dim) throws CompileError { + if (type.isPrimitive()) { + CtPrimitiveType pt = (CtPrimitiveType)type; + exprType = MemberResolver.descToType(pt.getDescriptor()); + arrayDim = dim; + className = null; + } + else if (type.isArray()) + try { + setType(type.getComponentType(), dim + 1); + } + catch (NotFoundException e) { + throw new CompileError("undefined type: " + type.getName()); + } + else { + exprType = CLASS; + arrayDim = dim; + className = MemberResolver.javaToJvmName(type.getName()); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java b/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java new file mode 100644 index 0000000..8f4aa18 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java @@ -0,0 +1,33 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +public final class KeywordTable extends java.util.HashMap { + public KeywordTable() { super(); } + + public int lookup(String name) { + Object found = get(name); + if (found == null) + return -1; + else + return ((Integer)found).intValue(); + } + + public void append(String name, int t) { + put(name, new Integer(t)); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java b/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java new file mode 100644 index 0000000..f83e802 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java @@ -0,0 +1,551 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +class Token { + public Token next = null; + public int tokenId; + + public long longValue; + public double doubleValue; + public String textValue; +} + +public class Lex implements TokenId { + private int lastChar; + private StringBuffer textBuffer; + private Token currentToken; + private Token lookAheadTokens; + + private String input; + private int position, maxlen, lineNumber; + + /** + * Constructs a lexical analyzer. + */ + public Lex(String s) { + lastChar = -1; + textBuffer = new StringBuffer(); + currentToken = new Token(); + lookAheadTokens = null; + + input = s; + position = 0; + maxlen = s.length(); + lineNumber = 0; + } + + public int get() { + if (lookAheadTokens == null) + return get(currentToken); + else { + Token t; + currentToken = t = lookAheadTokens; + lookAheadTokens = lookAheadTokens.next; + return t.tokenId; + } + } + + /** + * Looks at the next token. + */ + public int lookAhead() { + return lookAhead(0); + } + + public int lookAhead(int i) { + Token tk = lookAheadTokens; + if (tk == null) { + lookAheadTokens = tk = currentToken; // reuse an object! + tk.next = null; + get(tk); + } + + for (; i-- > 0; tk = tk.next) + if (tk.next == null) { + Token tk2; + tk.next = tk2 = new Token(); + get(tk2); + } + + currentToken = tk; + return tk.tokenId; + } + + public String getString() { + return currentToken.textValue; + } + + public long getLong() { + return currentToken.longValue; + } + + public double getDouble() { + return currentToken.doubleValue; + } + + private int get(Token token) { + int t; + do { + t = readLine(token); + } while (t == '\n'); + token.tokenId = t; + return t; + } + + private int readLine(Token token) { + int c = getNextNonWhiteChar(); + if(c < 0) + return c; + else if(c == '\n') { + ++lineNumber; + return '\n'; + } + else if (c == '\'') + return readCharConst(token); + else if (c == '"') + return readStringL(token); + else if ('0' <= c && c <= '9') + return readNumber(c, token); + else if(c == '.'){ + c = getc(); + if ('0' <= c && c <= '9') { + StringBuffer tbuf = textBuffer; + tbuf.setLength(0); + tbuf.append('.'); + return readDouble(tbuf, c, token); + } + else{ + ungetc(c); + return readSeparator('.'); + } + } + else if (Character.isJavaIdentifierStart((char)c)) + return readIdentifier(c, token); + else + return readSeparator(c); + } + + private int getNextNonWhiteChar() { + int c; + do { + c = getc(); + if (c == '/') { + c = getc(); + if (c == '/') + do { + c = getc(); + } while (c != '\n' && c != '\r' && c != -1); + else if (c == '*') + while (true) { + c = getc(); + if (c == -1) + break; + else if (c == '*') + if ((c = getc()) == '/') { + c = ' '; + break; + } + else + ungetc(c); + } + else { + ungetc(c); + c = '/'; + } + } + } while(isBlank(c)); + return c; + } + + private int readCharConst(Token token) { + int c; + int value = 0; + while ((c = getc()) != '\'') + if (c == '\\') + value = readEscapeChar(); + else if (c < 0x20) { + if (c == '\n') + ++lineNumber; + + return BadToken; + } + else + value = c; + + token.longValue = value; + return CharConstant; + } + + private int readEscapeChar() { + int c = getc(); + if (c == 'n') + c = '\n'; + else if (c == 't') + c = '\t'; + else if (c == 'r') + c = '\r'; + else if (c == 'f') + c = '\f'; + else if (c == '\n') + ++lineNumber; + + return c; + } + + private int readStringL(Token token) { + int c; + StringBuffer tbuf = textBuffer; + tbuf.setLength(0); + for (;;) { + while ((c = getc()) != '"') { + if (c == '\\') + c = readEscapeChar(); + else if (c == '\n' || c < 0) { + ++lineNumber; + return BadToken; + } + + tbuf.append((char)c); + } + + for (;;) { + c = getc(); + if (c == '\n') + ++lineNumber; + else if (!isBlank(c)) + break; + } + + if (c != '"') { + ungetc(c); + break; + } + } + + token.textValue = tbuf.toString(); + return StringL; + } + + private int readNumber(int c, Token token) { + long value = 0; + int c2 = getc(); + if (c == '0') + if (c2 == 'X' || c2 == 'x') + for (;;) { + c = getc(); + if ('0' <= c && c <= '9') + value = value * 16 + (long)(c - '0'); + else if ('A' <= c && c <= 'F') + value = value * 16 + (long)(c - 'A' + 10); + else if ('a' <= c && c <= 'f') + value = value * 16 + (long)(c - 'a' + 10); + else { + token.longValue = value; + if (c == 'L' || c == 'l') + return LongConstant; + else { + ungetc(c); + return IntConstant; + } + } + } + else if ('0' <= c2 && c2 <= '7') { + value = c2 - '0'; + for (;;) { + c = getc(); + if ('0' <= c && c <= '7') + value = value * 8 + (long)(c - '0'); + else { + token.longValue = value; + if (c == 'L' || c == 'l') + return LongConstant; + else { + ungetc(c); + return IntConstant; + } + } + } + } + + value = c - '0'; + while ('0' <= c2 && c2 <= '9') { + value = value * 10 + c2 - '0'; + c2 = getc(); + } + + token.longValue = value; + if (c2 == 'F' || c2 == 'f') { + token.doubleValue = (double)value; + return FloatConstant; + } + else if (c2 == 'E' || c2 == 'e' + || c2 == 'D' || c2 == 'd' || c2 == '.') { + StringBuffer tbuf = textBuffer; + tbuf.setLength(0); + tbuf.append(value); + return readDouble(tbuf, c2, token); + } + else if (c2 == 'L' || c2 == 'l') + return LongConstant; + else { + ungetc(c2); + return IntConstant; + } + } + + private int readDouble(StringBuffer sbuf, int c, Token token) { + if (c != 'E' && c != 'e' && c != 'D' && c != 'd') { + sbuf.append((char)c); + for (;;) { + c = getc(); + if ('0' <= c && c <= '9') + sbuf.append((char)c); + else + break; + } + } + + if (c == 'E' || c == 'e') { + sbuf.append((char)c); + c = getc(); + if (c == '+' || c == '-') { + sbuf.append((char)c); + c = getc(); + } + + while ('0' <= c && c <= '9') { + sbuf.append((char)c); + c = getc(); + } + } + + try { + token.doubleValue = Double.parseDouble(sbuf.toString()); + } + catch (NumberFormatException e) { + return BadToken; + } + + if (c == 'F' || c == 'f') + return FloatConstant; + else { + if (c != 'D' && c != 'd') + ungetc(c); + + return DoubleConstant; + } + } + + // !"#$%&'( )*+,-./0 12345678 9:;<=>? + private static final int[] equalOps + = { NEQ, 0, 0, 0, MOD_E, AND_E, 0, 0, + 0, MUL_E, PLUS_E, 0, MINUS_E, 0, DIV_E, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, LE, EQ, GE, 0 }; + + private int readSeparator(int c) { + int c2, c3; + if ('!' <= c && c <= '?') { + int t = equalOps[c - '!']; + if (t == 0) + return c; + else { + c2 = getc(); + if (c == c2) + switch (c) { + case '=' : + return EQ; + case '+' : + return PLUSPLUS; + case '-' : + return MINUSMINUS; + case '&' : + return ANDAND; + case '<' : + c3 = getc(); + if (c3 == '=') + return LSHIFT_E; + else { + ungetc(c3); + return LSHIFT; + } + case '>' : + c3 = getc(); + if (c3 == '=') + return RSHIFT_E; + else if (c3 == '>') { + c3 = getc(); + if (c3 == '=') + return ARSHIFT_E; + else { + ungetc(c3); + return ARSHIFT; + } + } + else { + ungetc(c3); + return RSHIFT; + } + default : + break; + } + else if (c2 == '=') + return t; + } + } + else if (c == '^') { + c2 = getc(); + if (c2 == '=') + return EXOR_E; + } + else if (c == '|') { + c2 = getc(); + if (c2 == '=') + return OR_E; + else if (c2 == '|') + return OROR; + } + else + return c; + + ungetc(c2); + return c; + } + + private int readIdentifier(int c, Token token) { + StringBuffer tbuf = textBuffer; + tbuf.setLength(0); + + do { + tbuf.append((char)c); + c = getc(); + } while (Character.isJavaIdentifierPart((char)c)); + + ungetc(c); + + String name = tbuf.toString(); + int t = ktable.lookup(name); + if (t >= 0) + return t; + else { + /* tbuf.toString() is executed quickly since it does not + * need memory copy. Using a hand-written extensible + * byte-array class instead of StringBuffer is not a good idea + * for execution speed. Converting a byte array to a String + * object is very slow. Using an extensible char array + * might be OK. + */ + token.textValue = name; + return Identifier; + } + } + + private static final KeywordTable ktable = new KeywordTable(); + + static { + ktable.append("abstract", ABSTRACT); + ktable.append("boolean", BOOLEAN); + ktable.append("break", BREAK); + ktable.append("byte", BYTE); + ktable.append("case", CASE); + ktable.append("catch", CATCH); + ktable.append("char", CHAR); + ktable.append("class", CLASS); + ktable.append("const", CONST); + ktable.append("continue", CONTINUE); + ktable.append("default", DEFAULT); + ktable.append("do", DO); + ktable.append("double", DOUBLE); + ktable.append("else", ELSE); + ktable.append("extends", EXTENDS); + ktable.append("false", FALSE); + ktable.append("final", FINAL); + ktable.append("finally", FINALLY); + ktable.append("float", FLOAT); + ktable.append("for", FOR); + ktable.append("goto", GOTO); + ktable.append("if", IF); + ktable.append("implements", IMPLEMENTS); + ktable.append("import", IMPORT); + ktable.append("instanceof", INSTANCEOF); + ktable.append("int", INT); + ktable.append("interface", INTERFACE); + ktable.append("long", LONG); + ktable.append("native", NATIVE); + ktable.append("new", NEW); + ktable.append("null", NULL); + ktable.append("package", PACKAGE); + ktable.append("private", PRIVATE); + ktable.append("protected", PROTECTED); + ktable.append("public", PUBLIC); + ktable.append("return", RETURN); + ktable.append("short", SHORT); + ktable.append("static", STATIC); + ktable.append("strictfp", STRICT); + ktable.append("super", SUPER); + ktable.append("switch", SWITCH); + ktable.append("synchronized", SYNCHRONIZED); + ktable.append("this", THIS); + ktable.append("throw", THROW); + ktable.append("throws", THROWS); + ktable.append("transient", TRANSIENT); + ktable.append("true", TRUE); + ktable.append("try", TRY); + ktable.append("void", VOID); + ktable.append("volatile", VOLATILE); + ktable.append("while", WHILE); + } + + private static boolean isBlank(int c) { + return c == ' ' || c == '\t' || c == '\f' || c == '\r' + || c == '\n'; + } + + private static boolean isDigit(int c) { + return '0' <= c && c <= '9'; + } + + private void ungetc(int c) { + lastChar = c; + } + + public String getTextAround() { + int begin = position - 10; + if (begin < 0) + begin = 0; + + int end = position + 10; + if (end > maxlen) + end = maxlen; + + return input.substring(begin, end); + } + + private int getc() { + if (lastChar < 0) + if (position < maxlen) + return input.charAt(position++); + else + return -1; + else { + int c = lastChar; + lastChar = -1; + return c; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java b/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java new file mode 100644 index 0000000..91d3d28 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java @@ -0,0 +1,1160 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.ast.*; + +import java.util.ArrayList; + +/* Code generator methods depending on javassist.* classes. + */ +public class MemberCodeGen extends CodeGen { + protected MemberResolver resolver; + protected CtClass thisClass; + protected MethodInfo thisMethod; + + protected boolean resultStatic; + + public MemberCodeGen(Bytecode b, CtClass cc, ClassPool cp) { + super(b); + resolver = new MemberResolver(cp); + thisClass = cc; + thisMethod = null; + } + + /** + * Returns the major version of the class file + * targeted by this compilation. + */ + public int getMajorVersion() { + ClassFile cf = thisClass.getClassFile2(); + if (cf == null) + return ClassFile.MAJOR_VERSION; // JDK 1.3 + else + return cf.getMajorVersion(); + } + + /** + * Records the currently compiled method. + */ + public void setThisMethod(CtMethod m) { + thisMethod = m.getMethodInfo2(); + if (typeChecker != null) + typeChecker.setThisMethod(thisMethod); + } + + public CtClass getThisClass() { return thisClass; } + + /** + * Returns the JVM-internal representation of this class name. + */ + protected String getThisName() { + return MemberResolver.javaToJvmName(thisClass.getName()); + } + + /** + * Returns the JVM-internal representation of this super class name. + */ + protected String getSuperName() throws CompileError { + return MemberResolver.javaToJvmName( + MemberResolver.getSuperclass(thisClass).getName()); + } + + protected void insertDefaultSuperCall() throws CompileError { + bytecode.addAload(0); + bytecode.addInvokespecial(MemberResolver.getSuperclass(thisClass), + "", "()V"); + } + + static class JsrHook extends ReturnHook { + ArrayList jsrList; + CodeGen cgen; + int var; + + JsrHook(CodeGen gen) { + super(gen); + jsrList = new ArrayList(); + cgen = gen; + var = -1; + } + + private int getVar(int size) { + if (var < 0) { + var = cgen.getMaxLocals(); + cgen.incMaxLocals(size); + } + + return var; + } + + private void jsrJmp(Bytecode b) { + b.addOpcode(Opcode.GOTO); + jsrList.add(new int[] {b.currentPc(), var}); + b.addIndex(0); + } + + protected boolean doit(Bytecode b, int opcode) { + switch (opcode) { + case Opcode.RETURN : + jsrJmp(b); + break; + case ARETURN : + b.addAstore(getVar(1)); + jsrJmp(b); + b.addAload(var); + break; + case IRETURN : + b.addIstore(getVar(1)); + jsrJmp(b); + b.addIload(var); + break; + case LRETURN : + b.addLstore(getVar(2)); + jsrJmp(b); + b.addLload(var); + break; + case DRETURN : + b.addDstore(getVar(2)); + jsrJmp(b); + b.addDload(var); + break; + case FRETURN : + b.addFstore(getVar(1)); + jsrJmp(b); + b.addFload(var); + break; + default : + throw new RuntimeException("fatal"); + } + + return false; + } + } + + static class JsrHook2 extends ReturnHook { + int var; + int target; + + JsrHook2(CodeGen gen, int[] retTarget) { + super(gen); + target = retTarget[0]; + var = retTarget[1]; + } + + protected boolean doit(Bytecode b, int opcode) { + switch (opcode) { + case Opcode.RETURN : + break; + case ARETURN : + b.addAstore(var); + break; + case IRETURN : + b.addIstore(var); + break; + case LRETURN : + b.addLstore(var); + break; + case DRETURN : + b.addDstore(var); + break; + case FRETURN : + b.addFstore(var); + break; + default : + throw new RuntimeException("fatal"); + } + + b.addOpcode(Opcode.GOTO); + b.addIndex(target - b.currentPc() + 3); + return true; + } + } + + protected void atTryStmnt(Stmnt st) throws CompileError { + Bytecode bc = bytecode; + Stmnt body = (Stmnt)st.getLeft(); + if (body == null) + return; + + ASTList catchList = (ASTList)st.getRight().getLeft(); + Stmnt finallyBlock = (Stmnt)st.getRight().getRight().getLeft(); + ArrayList gotoList = new ArrayList(); + + JsrHook jsrHook = null; + if (finallyBlock != null) + jsrHook = new JsrHook(this); + + int start = bc.currentPc(); + body.accept(this); + int end = bc.currentPc(); + if (start == end) + throw new CompileError("empty try block"); + + boolean tryNotReturn = !hasReturned; + if (tryNotReturn) { + bc.addOpcode(Opcode.GOTO); + gotoList.add(new Integer(bc.currentPc())); + bc.addIndex(0); // correct later + } + + int var = getMaxLocals(); + incMaxLocals(1); + while (catchList != null) { + // catch clause + Pair p = (Pair)catchList.head(); + catchList = catchList.tail(); + Declarator decl = (Declarator)p.getLeft(); + Stmnt block = (Stmnt)p.getRight(); + + decl.setLocalVar(var); + + CtClass type = resolver.lookupClassByJvmName(decl.getClassName()); + decl.setClassName(MemberResolver.javaToJvmName(type.getName())); + bc.addExceptionHandler(start, end, bc.currentPc(), type); + bc.growStack(1); + bc.addAstore(var); + hasReturned = false; + if (block != null) + block.accept(this); + + if (!hasReturned) { + bc.addOpcode(Opcode.GOTO); + gotoList.add(new Integer(bc.currentPc())); + bc.addIndex(0); // correct later + tryNotReturn = true; + } + } + + if (finallyBlock != null) { + jsrHook.remove(this); + // catch (any) clause + int pcAnyCatch = bc.currentPc(); + bc.addExceptionHandler(start, pcAnyCatch, pcAnyCatch, 0); + bc.growStack(1); + bc.addAstore(var); + hasReturned = false; + finallyBlock.accept(this); + if (!hasReturned) { + bc.addAload(var); + bc.addOpcode(ATHROW); + } + + addFinally(jsrHook.jsrList, finallyBlock); + } + + int pcEnd = bc.currentPc(); + patchGoto(gotoList, pcEnd); + hasReturned = !tryNotReturn; + if (finallyBlock != null) { + if (tryNotReturn) + finallyBlock.accept(this); + } + } + + /** + * Adds a finally clause for earch return statement. + */ + private void addFinally(ArrayList returnList, Stmnt finallyBlock) + throws CompileError + { + Bytecode bc = bytecode; + int n = returnList.size(); + for (int i = 0; i < n; ++i) { + final int[] ret = (int[])returnList.get(i); + int pc = ret[0]; + bc.write16bit(pc, bc.currentPc() - pc + 1); + ReturnHook hook = new JsrHook2(this, ret); + finallyBlock.accept(this); + hook.remove(this); + if (!hasReturned) { + bc.addOpcode(Opcode.GOTO); + bc.addIndex(pc + 3 - bc.currentPc()); + } + } + } + + public void atNewExpr(NewExpr expr) throws CompileError { + if (expr.isArray()) + atNewArrayExpr(expr); + else { + CtClass clazz = resolver.lookupClassByName(expr.getClassName()); + String cname = clazz.getName(); + ASTList args = expr.getArguments(); + bytecode.addNew(cname); + bytecode.addOpcode(DUP); + + atMethodCallCore(clazz, MethodInfo.nameInit, args, + false, true, -1, null); + + exprType = CLASS; + arrayDim = 0; + className = MemberResolver.javaToJvmName(cname); + } + } + + public void atNewArrayExpr(NewExpr expr) throws CompileError { + int type = expr.getArrayType(); + ASTList size = expr.getArraySize(); + ASTList classname = expr.getClassName(); + ArrayInit init = expr.getInitializer(); + if (size.length() > 1) { + if (init != null) + throw new CompileError( + "sorry, multi-dimensional array initializer " + + "for new is not supported"); + + atMultiNewArray(type, classname, size); + return; + } + + ASTree sizeExpr = size.head(); + atNewArrayExpr2(type, sizeExpr, Declarator.astToClassName(classname, '/'), init); + } + + private void atNewArrayExpr2(int type, ASTree sizeExpr, + String jvmClassname, ArrayInit init) throws CompileError { + if (init == null) + if (sizeExpr == null) + throw new CompileError("no array size"); + else + sizeExpr.accept(this); + else + if (sizeExpr == null) { + int s = init.length(); + bytecode.addIconst(s); + } + else + throw new CompileError("unnecessary array size specified for new"); + + String elementClass; + if (type == CLASS) { + elementClass = resolveClassName(jvmClassname); + bytecode.addAnewarray(MemberResolver.jvmToJavaName(elementClass)); + } + else { + elementClass = null; + int atype = 0; + switch (type) { + case BOOLEAN : + atype = T_BOOLEAN; + break; + case CHAR : + atype = T_CHAR; + break; + case FLOAT : + atype = T_FLOAT; + break; + case DOUBLE : + atype = T_DOUBLE; + break; + case BYTE : + atype = T_BYTE; + break; + case SHORT : + atype = T_SHORT; + break; + case INT : + atype = T_INT; + break; + case LONG : + atype = T_LONG; + break; + default : + badNewExpr(); + break; + } + + bytecode.addOpcode(NEWARRAY); + bytecode.add(atype); + } + + if (init != null) { + int s = init.length(); + ASTList list = init; + for (int i = 0; i < s; i++) { + bytecode.addOpcode(DUP); + bytecode.addIconst(i); + list.head().accept(this); + if (!isRefType(type)) + atNumCastExpr(exprType, type); + + bytecode.addOpcode(getArrayWriteOp(type, 0)); + list = list.tail(); + } + } + + exprType = type; + arrayDim = 1; + className = elementClass; + } + + private static void badNewExpr() throws CompileError { + throw new CompileError("bad new expression"); + } + + protected void atArrayVariableAssign(ArrayInit init, int varType, + int varArray, String varClass) throws CompileError { + atNewArrayExpr2(varType, null, varClass, init); + } + + public void atArrayInit(ArrayInit init) throws CompileError { + throw new CompileError("array initializer is not supported"); + } + + protected void atMultiNewArray(int type, ASTList classname, ASTList size) + throws CompileError + { + int count, dim; + dim = size.length(); + for (count = 0; size != null; size = size.tail()) { + ASTree s = size.head(); + if (s == null) + break; // int[][][] a = new int[3][4][]; + + ++count; + s.accept(this); + if (exprType != INT) + throw new CompileError("bad type for array size"); + } + + String desc; + exprType = type; + arrayDim = dim; + if (type == CLASS) { + className = resolveClassName(classname); + desc = toJvmArrayName(className, dim); + } + else + desc = toJvmTypeName(type, dim); + + bytecode.addMultiNewarray(desc, count); + } + + public void atCallExpr(CallExpr expr) throws CompileError { + String mname = null; + CtClass targetClass = null; + ASTree method = expr.oprand1(); + ASTList args = (ASTList)expr.oprand2(); + boolean isStatic = false; + boolean isSpecial = false; + int aload0pos = -1; + + MemberResolver.Method cached = expr.getMethod(); + if (method instanceof Member) { + mname = ((Member)method).get(); + targetClass = thisClass; + if (inStaticMethod || (cached != null && cached.isStatic())) + isStatic = true; // should be static + else { + aload0pos = bytecode.currentPc(); + bytecode.addAload(0); // this + } + } + else if (method instanceof Keyword) { // constructor + isSpecial = true; + mname = MethodInfo.nameInit; // + targetClass = thisClass; + if (inStaticMethod) + throw new CompileError("a constructor cannot be static"); + else + bytecode.addAload(0); // this + + if (((Keyword)method).get() == SUPER) + targetClass = MemberResolver.getSuperclass(targetClass); + } + else if (method instanceof Expr) { + Expr e = (Expr)method; + mname = ((Symbol)e.oprand2()).get(); + int op = e.getOperator(); + if (op == MEMBER) { // static method + targetClass + = resolver.lookupClass(((Symbol)e.oprand1()).get(), false); + isStatic = true; + } + else if (op == '.') { + ASTree target = e.oprand1(); + String classFollowedByDotSuper = TypeChecker.isDotSuper(target); + if (classFollowedByDotSuper != null) { + isSpecial = true; + targetClass = MemberResolver.getSuperInterface(thisClass, + classFollowedByDotSuper); + if (inStaticMethod || (cached != null && cached.isStatic())) + isStatic = true; // should be static + else { + aload0pos = bytecode.currentPc(); + bytecode.addAload(0); // this + } + } + else { + if (target instanceof Keyword) + if (((Keyword)target).get() == SUPER) + isSpecial = true; + + try { + target.accept(this); + } + catch (NoFieldException nfe) { + if (nfe.getExpr() != target) + throw nfe; + + // it should be a static method. + exprType = CLASS; + arrayDim = 0; + className = nfe.getField(); // JVM-internal + isStatic = true; + } + + if (arrayDim > 0) + targetClass = resolver.lookupClass(javaLangObject, true); + else if (exprType == CLASS /* && arrayDim == 0 */) + targetClass = resolver.lookupClassByJvmName(className); + else + badMethod(); + } + } + else + badMethod(); + } + else + fatal(); + + atMethodCallCore(targetClass, mname, args, isStatic, isSpecial, + aload0pos, cached); + } + + private static void badMethod() throws CompileError { + throw new CompileError("bad method"); + } + + /* + * atMethodCallCore() is also called by doit() in NewExpr.ProceedForNew + * + * @param targetClass the class at which method lookup starts. + * @param found not null if the method look has been already done. + */ + public void atMethodCallCore(CtClass targetClass, String mname, + ASTList args, boolean isStatic, boolean isSpecial, + int aload0pos, MemberResolver.Method found) + throws CompileError + { + int nargs = getMethodArgsLength(args); + int[] types = new int[nargs]; + int[] dims = new int[nargs]; + String[] cnames = new String[nargs]; + + if (!isStatic && found != null && found.isStatic()) { + bytecode.addOpcode(POP); + isStatic = true; + } + + int stack = bytecode.getStackDepth(); + + // generate code for evaluating arguments. + atMethodArgs(args, types, dims, cnames); + + if (found == null) + found = resolver.lookupMethod(targetClass, thisClass, thisMethod, + mname, types, dims, cnames); + + if (found == null) { + String msg; + if (mname.equals(MethodInfo.nameInit)) + msg = "constructor not found"; + else + msg = "Method " + mname + " not found in " + + targetClass.getName(); + + throw new CompileError(msg); + } + + atMethodCallCore2(targetClass, mname, isStatic, isSpecial, + aload0pos, found); + } + + private void atMethodCallCore2(CtClass targetClass, String mname, + boolean isStatic, boolean isSpecial, + int aload0pos, + MemberResolver.Method found) + throws CompileError + { + CtClass declClass = found.declaring; + MethodInfo minfo = found.info; + String desc = minfo.getDescriptor(); + int acc = minfo.getAccessFlags(); + + if (mname.equals(MethodInfo.nameInit)) { + isSpecial = true; + if (declClass != targetClass) + throw new CompileError("no such constructor: " + targetClass.getName()); + + if (declClass != thisClass && AccessFlag.isPrivate(acc)) { + desc = getAccessibleConstructor(desc, declClass, minfo); + bytecode.addOpcode(Opcode.ACONST_NULL); // the last parameter + } + } + else if (AccessFlag.isPrivate(acc)) + if (declClass == thisClass) + isSpecial = true; + else { + isSpecial = false; + isStatic = true; + String origDesc = desc; + if ((acc & AccessFlag.STATIC) == 0) + desc = Descriptor.insertParameter(declClass.getName(), + origDesc); + + acc = AccessFlag.setPackage(acc) | AccessFlag.STATIC; + mname = getAccessiblePrivate(mname, origDesc, desc, + minfo, declClass); + } + + boolean popTarget = false; + if ((acc & AccessFlag.STATIC) != 0) { + if (!isStatic) { + /* this method is static but the target object is + on stack. It must be popped out. If aload0pos >= 0, + then the target object was pushed by aload_0. It is + overwritten by NOP. + */ + isStatic = true; + if (aload0pos >= 0) + bytecode.write(aload0pos, NOP); + else + popTarget = true; + } + + bytecode.addInvokestatic(declClass, mname, desc); + } + else if (isSpecial) // if (isSpecial && notStatic(acc)) + bytecode.addInvokespecial(declClass, mname, desc); + else { + if (!Modifier.isPublic(declClass.getModifiers()) + || declClass.isInterface() != targetClass.isInterface()) + declClass = targetClass; + + if (declClass.isInterface()) { + int nargs = Descriptor.paramSize(desc) + 1; + bytecode.addInvokeinterface(declClass, mname, desc, nargs); + } + else + if (isStatic) + throw new CompileError(mname + " is not static"); + else + bytecode.addInvokevirtual(declClass, mname, desc); + } + + setReturnType(desc, isStatic, popTarget); + } + + /* + * Finds (or adds if necessary) a hidden accessor if the method + * is in an enclosing class. + * + * @param desc the descriptor of the method. + * @param declClass the class declaring the method. + */ + protected String getAccessiblePrivate(String methodName, String desc, + String newDesc, MethodInfo minfo, + CtClass declClass) + throws CompileError + { + if (isEnclosing(declClass, thisClass)) { + AccessorMaker maker = declClass.getAccessorMaker(); + if (maker != null) + return maker.getMethodAccessor(methodName, desc, newDesc, + minfo); + } + + throw new CompileError("Method " + methodName + + " is private"); + } + + /* + * Finds (or adds if necessary) a hidden constructor if the given + * constructor is in an enclosing class. + * + * @param desc the descriptor of the constructor. + * @param declClass the class declaring the constructor. + * @param minfo the method info of the constructor. + * @return the descriptor of the hidden constructor. + */ + protected String getAccessibleConstructor(String desc, CtClass declClass, + MethodInfo minfo) + throws CompileError + { + if (isEnclosing(declClass, thisClass)) { + AccessorMaker maker = declClass.getAccessorMaker(); + if (maker != null) + return maker.getConstructor(declClass, desc, minfo); + } + + throw new CompileError("the called constructor is private in " + + declClass.getName()); + } + + private boolean isEnclosing(CtClass outer, CtClass inner) { + try { + while (inner != null) { + inner = inner.getDeclaringClass(); + if (inner == outer) + return true; + } + } + catch (NotFoundException e) {} + return false; + } + + public int getMethodArgsLength(ASTList args) { + return ASTList.length(args); + } + + public void atMethodArgs(ASTList args, int[] types, int[] dims, + String[] cnames) throws CompileError { + int i = 0; + while (args != null) { + ASTree a = args.head(); + a.accept(this); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + args = args.tail(); + } + } + + void setReturnType(String desc, boolean isStatic, boolean popTarget) + throws CompileError + { + int i = desc.indexOf(')'); + if (i < 0) + badMethod(); + + char c = desc.charAt(++i); + int dim = 0; + while (c == '[') { + ++dim; + c = desc.charAt(++i); + } + + arrayDim = dim; + if (c == 'L') { + int j = desc.indexOf(';', i + 1); + if (j < 0) + badMethod(); + + exprType = CLASS; + className = desc.substring(i + 1, j); + } + else { + exprType = MemberResolver.descToType(c); + className = null; + } + + int etype = exprType; + if (isStatic) { + if (popTarget) { + if (is2word(etype, dim)) { + bytecode.addOpcode(DUP2_X1); + bytecode.addOpcode(POP2); + bytecode.addOpcode(POP); + } + else if (etype == VOID) + bytecode.addOpcode(POP); + else { + bytecode.addOpcode(SWAP); + bytecode.addOpcode(POP); + } + } + } + } + + protected void atFieldAssign(Expr expr, int op, ASTree left, + ASTree right, boolean doDup) throws CompileError + { + CtField f = fieldAccess(left, false); + boolean is_static = resultStatic; + if (op != '=' && !is_static) + bytecode.addOpcode(DUP); + + int fi; + if (op == '=') { + FieldInfo finfo = f.getFieldInfo2(); + setFieldType(finfo); + AccessorMaker maker = isAccessibleField(f, finfo); + if (maker == null) + fi = addFieldrefInfo(f, finfo); + else + fi = 0; + } + else + fi = atFieldRead(f, is_static); + + int fType = exprType; + int fDim = arrayDim; + String cname = className; + + atAssignCore(expr, op, right, fType, fDim, cname); + + boolean is2w = is2word(fType, fDim); + if (doDup) { + int dup_code; + if (is_static) + dup_code = (is2w ? DUP2 : DUP); + else + dup_code = (is2w ? DUP2_X1 : DUP_X1); + + bytecode.addOpcode(dup_code); + } + + atFieldAssignCore(f, is_static, fi, is2w); + + exprType = fType; + arrayDim = fDim; + className = cname; + } + + /* If fi == 0, the field must be a private field in an enclosing class. + */ + private void atFieldAssignCore(CtField f, boolean is_static, int fi, + boolean is2byte) throws CompileError { + if (fi != 0) { + if (is_static) { + bytecode.add(PUTSTATIC); + bytecode.growStack(is2byte ? -2 : -1); + } + else { + bytecode.add(PUTFIELD); + bytecode.growStack(is2byte ? -3 : -2); + } + + bytecode.addIndex(fi); + } + else { + CtClass declClass = f.getDeclaringClass(); + AccessorMaker maker = declClass.getAccessorMaker(); + // make should be non null. + FieldInfo finfo = f.getFieldInfo2(); + MethodInfo minfo = maker.getFieldSetter(finfo, is_static); + bytecode.addInvokestatic(declClass, minfo.getName(), + minfo.getDescriptor()); + } + } + + /* overwritten in JvstCodeGen. + */ + public void atMember(Member mem) throws CompileError { + atFieldRead(mem); + } + + protected void atFieldRead(ASTree expr) throws CompileError + { + CtField f = fieldAccess(expr, true); + if (f == null) { + atArrayLength(expr); + return; + } + + boolean is_static = resultStatic; + ASTree cexpr = TypeChecker.getConstantFieldValue(f); + if (cexpr == null) + atFieldRead(f, is_static); + else { + cexpr.accept(this); + setFieldType(f.getFieldInfo2()); + } + } + + private void atArrayLength(ASTree expr) throws CompileError { + if (arrayDim == 0) + throw new CompileError(".length applied to a non array"); + + bytecode.addOpcode(ARRAYLENGTH); + exprType = INT; + arrayDim = 0; + } + + /** + * Generates bytecode for reading a field value. + * It returns a fieldref_info index or zero if the field is a private + * one declared in an enclosing class. + */ + private int atFieldRead(CtField f, boolean isStatic) throws CompileError { + FieldInfo finfo = f.getFieldInfo2(); + boolean is2byte = setFieldType(finfo); + AccessorMaker maker = isAccessibleField(f, finfo); + if (maker != null) { + MethodInfo minfo = maker.getFieldGetter(finfo, isStatic); + bytecode.addInvokestatic(f.getDeclaringClass(), minfo.getName(), + minfo.getDescriptor()); + return 0; + } + else { + int fi = addFieldrefInfo(f, finfo); + if (isStatic) { + bytecode.add(GETSTATIC); + bytecode.growStack(is2byte ? 2 : 1); + } + else { + bytecode.add(GETFIELD); + bytecode.growStack(is2byte ? 1 : 0); + } + + bytecode.addIndex(fi); + return fi; + } + } + + /** + * Returns null if the field is accessible. Otherwise, it throws + * an exception or it returns AccessorMaker if the field is a private + * one declared in an enclosing class. + */ + private AccessorMaker isAccessibleField(CtField f, FieldInfo finfo) + throws CompileError + { + if (AccessFlag.isPrivate(finfo.getAccessFlags()) + && f.getDeclaringClass() != thisClass) { + CtClass declClass = f.getDeclaringClass(); + if (isEnclosing(declClass, thisClass)) { + AccessorMaker maker = declClass.getAccessorMaker(); + if (maker != null) + return maker; + else + throw new CompileError("fatal error. bug?"); + } + else + throw new CompileError("Field " + f.getName() + " in " + + declClass.getName() + " is private."); + } + + return null; // accessible field + } + + /** + * Sets exprType, arrayDim, and className. + * + * @return true if the field type is long or double. + */ + private boolean setFieldType(FieldInfo finfo) throws CompileError { + String type = finfo.getDescriptor(); + + int i = 0; + int dim = 0; + char c = type.charAt(i); + while (c == '[') { + ++dim; + c = type.charAt(++i); + } + + arrayDim = dim; + exprType = MemberResolver.descToType(c); + + if (c == 'L') + className = type.substring(i + 1, type.indexOf(';', i + 1)); + else + className = null; + + boolean is2byte = dim == 0 && (c == 'J' || c == 'D'); + return is2byte; + } + + private int addFieldrefInfo(CtField f, FieldInfo finfo) { + ConstPool cp = bytecode.getConstPool(); + String cname = f.getDeclaringClass().getName(); + int ci = cp.addClassInfo(cname); + String name = finfo.getName(); + String type = finfo.getDescriptor(); + return cp.addFieldrefInfo(ci, name, type); + } + + protected void atClassObject2(String cname) throws CompileError { + if (getMajorVersion() < ClassFile.JAVA_5) + super.atClassObject2(cname); + else + bytecode.addLdc(bytecode.getConstPool().addClassInfo(cname)); + } + + protected void atFieldPlusPlus(int token, boolean isPost, + ASTree oprand, Expr expr, boolean doDup) + throws CompileError + { + CtField f = fieldAccess(oprand, false); + boolean is_static = resultStatic; + if (!is_static) + bytecode.addOpcode(DUP); + + int fi = atFieldRead(f, is_static); + int t = exprType; + boolean is2w = is2word(t, arrayDim); + + int dup_code; + if (is_static) + dup_code = (is2w ? DUP2 : DUP); + else + dup_code = (is2w ? DUP2_X1 : DUP_X1); + + atPlusPlusCore(dup_code, doDup, token, isPost, expr); + atFieldAssignCore(f, is_static, fi, is2w); + } + + /* This method also returns a value in resultStatic. + * + * @param acceptLength true if array length is acceptable + */ + protected CtField fieldAccess(ASTree expr, boolean acceptLength) + throws CompileError + { + if (expr instanceof Member) { + String name = ((Member)expr).get(); + CtField f = null; + try { + f = thisClass.getField(name); + } + catch (NotFoundException e) { + // EXPR might be part of a static member access? + throw new NoFieldException(name, expr); + } + + boolean is_static = Modifier.isStatic(f.getModifiers()); + if (!is_static) + if (inStaticMethod) + throw new CompileError( + "not available in a static method: " + name); + else + bytecode.addAload(0); // this + + resultStatic = is_static; + return f; + } + else if (expr instanceof Expr) { + Expr e = (Expr)expr; + int op = e.getOperator(); + if (op == MEMBER) { + /* static member by # (extension by Javassist) + * For example, if int.class is parsed, the resulting tree + * is (# "java.lang.Integer" "TYPE"). + */ + CtField f = resolver.lookupField(((Symbol)e.oprand1()).get(), + (Symbol)e.oprand2()); + resultStatic = true; + return f; + } + else if (op == '.') { + CtField f = null; + try { + e.oprand1().accept(this); + /* Don't call lookupFieldByJvmName2(). + * The left operand of . is not a class name but + * a normal expression. + */ + if (exprType == CLASS && arrayDim == 0) + f = resolver.lookupFieldByJvmName(className, + (Symbol)e.oprand2()); + else if (acceptLength && arrayDim > 0 + && ((Symbol)e.oprand2()).get().equals("length")) + return null; // expr is an array length. + else + badLvalue(); + + boolean is_static = Modifier.isStatic(f.getModifiers()); + if (is_static) + bytecode.addOpcode(POP); + + resultStatic = is_static; + return f; + } + catch (NoFieldException nfe) { + if (nfe.getExpr() != e.oprand1()) + throw nfe; + + /* EXPR should be a static field. + * If EXPR might be part of a qualified class name, + * lookupFieldByJvmName2() throws NoFieldException. + */ + Symbol fname = (Symbol)e.oprand2(); + String cname = nfe.getField(); + f = resolver.lookupFieldByJvmName2(cname, fname, expr); + resultStatic = true; + return f; + } + } + else + badLvalue(); + } + else + badLvalue(); + + resultStatic = false; + return null; // never reach + } + + private static void badLvalue() throws CompileError { + throw new CompileError("bad l-value"); + } + + public CtClass[] makeParamList(MethodDecl md) throws CompileError { + CtClass[] params; + ASTList plist = md.getParams(); + if (plist == null) + params = new CtClass[0]; + else { + int i = 0; + params = new CtClass[plist.length()]; + while (plist != null) { + params[i++] = resolver.lookupClass((Declarator)plist.head()); + plist = plist.tail(); + } + } + + return params; + } + + public CtClass[] makeThrowsList(MethodDecl md) throws CompileError { + CtClass[] clist; + ASTList list = md.getThrows(); + if (list == null) + return null; + else { + int i = 0; + clist = new CtClass[list.length()]; + while (list != null) { + clist[i++] = resolver.lookupClassByName((ASTList)list.head()); + list = list.tail(); + } + + return clist; + } + } + + /* Converts a class name into a JVM-internal representation. + * + * It may also expand a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected String resolveClassName(ASTList name) throws CompileError { + return resolver.resolveClassName(name); + } + + /* Expands a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected String resolveClassName(String jvmName) throws CompileError { + return resolver.resolveJvmClassName(jvmName); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java b/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java new file mode 100644 index 0000000..933a626 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java @@ -0,0 +1,617 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import java.util.Hashtable; +import java.lang.ref.WeakReference; +import java.util.WeakHashMap; +import java.util.List; +import java.util.Iterator; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.ast.*; + +/* Code generator methods depending on javassist.* classes. + */ +public class MemberResolver implements TokenId { + private ClassPool classPool; + + public MemberResolver(ClassPool cp) { + classPool = cp; + } + + public ClassPool getClassPool() { return classPool; } + + private static void fatal() throws CompileError { + throw new CompileError("fatal"); + } + + public static class Method { + public CtClass declaring; + public MethodInfo info; + public int notmatch; + + public Method(CtClass c, MethodInfo i, int n) { + declaring = c; + info = i; + notmatch = n; + } + + /** + * Returns true if the invoked method is static. + */ + public boolean isStatic() { + int acc = info.getAccessFlags(); + return (acc & AccessFlag.STATIC) != 0; + } + } + + public Method lookupMethod(CtClass clazz, CtClass currentClass, MethodInfo current, + String methodName, + int[] argTypes, int[] argDims, + String[] argClassNames) + throws CompileError + { + Method maybe = null; + // to enable the creation of a recursively called method + if (current != null && clazz == currentClass) + if (current.getName().equals(methodName)) { + int res = compareSignature(current.getDescriptor(), + argTypes, argDims, argClassNames); + if (res != NO) { + Method r = new Method(clazz, current, res); + if (res == YES) + return r; + else + maybe = r; + } + } + + Method m = lookupMethod(clazz, methodName, argTypes, argDims, + argClassNames, maybe != null); + if (m != null) + return m; + else + return maybe; + } + + private Method lookupMethod(CtClass clazz, String methodName, + int[] argTypes, int[] argDims, + String[] argClassNames, boolean onlyExact) + throws CompileError + { + Method maybe = null; + ClassFile cf = clazz.getClassFile2(); + // If the class is an array type, the class file is null. + // If so, search the super class java.lang.Object for clone() etc. + if (cf != null) { + List list = cf.getMethods(); + int n = list.size(); + for (int i = 0; i < n; ++i) { + MethodInfo minfo = (MethodInfo)list.get(i); + if (minfo.getName().equals(methodName)) { + int res = compareSignature(minfo.getDescriptor(), + argTypes, argDims, argClassNames); + if (res != NO) { + Method r = new Method(clazz, minfo, res); + if (res == YES) + return r; + else if (maybe == null || maybe.notmatch > res) + maybe = r; + } + } + } + } + + if (onlyExact) + maybe = null; + else + onlyExact = maybe != null; + + int mod = clazz.getModifiers(); + boolean isIntf = Modifier.isInterface(mod); + try { + // skip searching java.lang.Object if clazz is an interface type. + if (!isIntf) { + CtClass pclazz = clazz.getSuperclass(); + if (pclazz != null) { + Method r = lookupMethod(pclazz, methodName, argTypes, + argDims, argClassNames, onlyExact); + if (r != null) + return r; + } + } + } + catch (NotFoundException e) {} + + try { + CtClass[] ifs = clazz.getInterfaces(); + int size = ifs.length; + for (int i = 0; i < size; ++i) { + Method r = lookupMethod(ifs[i], methodName, + argTypes, argDims, argClassNames, + onlyExact); + if (r != null) + return r; + } + + if (isIntf) { + // finally search java.lang.Object. + CtClass pclazz = clazz.getSuperclass(); + if (pclazz != null) { + Method r = lookupMethod(pclazz, methodName, argTypes, + argDims, argClassNames, onlyExact); + if (r != null) + return r; + } + } + } + catch (NotFoundException e) {} + + return maybe; + } + + private static final int YES = 0; + private static final int NO = -1; + + /* + * Returns YES if actual parameter types matches the given signature. + * + * argTypes, argDims, and argClassNames represent actual parameters. + * + * This method does not correctly implement the Java method dispatch + * algorithm. + * + * If some of the parameter types exactly match but others are subtypes of + * the corresponding type in the signature, this method returns the number + * of parameter types that do not exactly match. + */ + private int compareSignature(String desc, int[] argTypes, + int[] argDims, String[] argClassNames) + throws CompileError + { + int result = YES; + int i = 1; + int nArgs = argTypes.length; + if (nArgs != Descriptor.numOfParameters(desc)) + return NO; + + int len = desc.length(); + for (int n = 0; i < len; ++n) { + char c = desc.charAt(i++); + if (c == ')') + return (n == nArgs ? result : NO); + else if (n >= nArgs) + return NO; + + int dim = 0; + while (c == '[') { + ++dim; + c = desc.charAt(i++); + } + + if (argTypes[n] == NULL) { + if (dim == 0 && c != 'L') + return NO; + + if (c == 'L') + i = desc.indexOf(';', i) + 1; + } + else if (argDims[n] != dim) { + if (!(dim == 0 && c == 'L' + && desc.startsWith("java/lang/Object;", i))) + return NO; + + // if the thread reaches here, c must be 'L'. + i = desc.indexOf(';', i) + 1; + result++; + if (i <= 0) + return NO; // invalid descriptor? + } + else if (c == 'L') { // not compare + int j = desc.indexOf(';', i); + if (j < 0 || argTypes[n] != CLASS) + return NO; + + String cname = desc.substring(i, j); + if (!cname.equals(argClassNames[n])) { + CtClass clazz = lookupClassByJvmName(argClassNames[n]); + try { + if (clazz.subtypeOf(lookupClassByJvmName(cname))) + result++; + else + return NO; + } + catch (NotFoundException e) { + result++; // should be NO? + } + } + + i = j + 1; + } + else { + int t = descToType(c); + int at = argTypes[n]; + if (t != at) + if (t == INT + && (at == SHORT || at == BYTE || at == CHAR)) + result++; + else + return NO; + } + } + + return NO; + } + + /** + * Only used by fieldAccess() in MemberCodeGen and TypeChecker. + * + * @param jvmClassName a JVM class name. e.g. java/lang/String + * @see #lookupClass(String, boolean) + */ + public CtField lookupFieldByJvmName2(String jvmClassName, Symbol fieldSym, + ASTree expr) throws NoFieldException + { + String field = fieldSym.get(); + CtClass cc = null; + try { + cc = lookupClass(jvmToJavaName(jvmClassName), true); + } + catch (CompileError e) { + // EXPR might be part of a qualified class name. + throw new NoFieldException(jvmClassName + "/" + field, expr); + } + + try { + return cc.getField(field); + } + catch (NotFoundException e) { + // maybe an inner class. + jvmClassName = javaToJvmName(cc.getName()); + throw new NoFieldException(jvmClassName + "$" + field, expr); + } + } + + /** + * @param jvmClassName a JVM class name. e.g. java/lang/String + */ + public CtField lookupFieldByJvmName(String jvmClassName, Symbol fieldName) + throws CompileError + { + return lookupField(jvmToJavaName(jvmClassName), fieldName); + } + + /** + * @param className a qualified class name. e.g. java.lang.String + */ + public CtField lookupField(String className, Symbol fieldName) + throws CompileError + { + CtClass cc = lookupClass(className, false); + try { + return cc.getField(fieldName.get()); + } + catch (NotFoundException e) {} + throw new CompileError("no such field: " + fieldName.get()); + } + + public CtClass lookupClassByName(ASTList name) throws CompileError { + return lookupClass(Declarator.astToClassName(name, '.'), false); + } + + public CtClass lookupClassByJvmName(String jvmName) throws CompileError { + return lookupClass(jvmToJavaName(jvmName), false); + } + + public CtClass lookupClass(Declarator decl) throws CompileError { + return lookupClass(decl.getType(), decl.getArrayDim(), + decl.getClassName()); + } + + /** + * @param classname jvm class name. + */ + public CtClass lookupClass(int type, int dim, String classname) + throws CompileError + { + String cname = ""; + CtClass clazz; + if (type == CLASS) { + clazz = lookupClassByJvmName(classname); + if (dim > 0) + cname = clazz.getName(); + else + return clazz; + } + else + cname = getTypeName(type); + + while (dim-- > 0) + cname += "[]"; + + return lookupClass(cname, false); + } + + /* + * type cannot be CLASS + */ + static String getTypeName(int type) throws CompileError { + String cname = ""; + switch (type) { + case BOOLEAN : + cname = "boolean"; + break; + case CHAR : + cname = "char"; + break; + case BYTE : + cname = "byte"; + break; + case SHORT : + cname = "short"; + break; + case INT : + cname = "int"; + break; + case LONG : + cname = "long"; + break; + case FLOAT : + cname = "float"; + break; + case DOUBLE : + cname = "double"; + break; + case VOID : + cname = "void"; + break; + default : + fatal(); + } + + return cname; + } + + /** + * @param name a qualified class name. e.g. java.lang.String + */ + public CtClass lookupClass(String name, boolean notCheckInner) + throws CompileError + { + Hashtable cache = getInvalidNames(); + Object found = cache.get(name); + if (found == INVALID) + throw new CompileError("no such class: " + name); + else if (found != null) + try { + return classPool.get((String)found); + } + catch (NotFoundException e) {} + + CtClass cc = null; + try { + cc = lookupClass0(name, notCheckInner); + } + catch (NotFoundException e) { + cc = searchImports(name); + } + + cache.put(name, cc.getName()); + return cc; + } + + private static final String INVALID = ""; + private static WeakHashMap invalidNamesMap = new WeakHashMap(); + private Hashtable invalidNames = null; + + // for unit tests + public static int getInvalidMapSize() { return invalidNamesMap.size(); } + + private Hashtable getInvalidNames() { + Hashtable ht = invalidNames; + if (ht == null) { + synchronized (MemberResolver.class) { + WeakReference ref = (WeakReference)invalidNamesMap.get(classPool); + if (ref != null) + ht = (Hashtable)ref.get(); + + if (ht == null) { + ht = new Hashtable(); + invalidNamesMap.put(classPool, new WeakReference(ht)); + } + } + + invalidNames = ht; + } + + return ht; + } + + private CtClass searchImports(String orgName) + throws CompileError + { + if (orgName.indexOf('.') < 0) { + Iterator it = classPool.getImportedPackages(); + while (it.hasNext()) { + String pac = (String)it.next(); + String fqName = pac + '.' + orgName; + try { + return classPool.get(fqName); + } + catch (NotFoundException e) { + try { + if (pac.endsWith("." + orgName)) + return classPool.get(pac); + } + catch (NotFoundException e2) {} + } + } + } + + getInvalidNames().put(orgName, INVALID); + throw new CompileError("no such class: " + orgName); + } + + private CtClass lookupClass0(String classname, boolean notCheckInner) + throws NotFoundException + { + CtClass cc = null; + do { + try { + cc = classPool.get(classname); + } + catch (NotFoundException e) { + int i = classname.lastIndexOf('.'); + if (notCheckInner || i < 0) + throw e; + else { + StringBuffer sbuf = new StringBuffer(classname); + sbuf.setCharAt(i, '$'); + classname = sbuf.toString(); + } + } + } while (cc == null); + return cc; + } + + /* Converts a class name into a JVM-internal representation. + * + * It may also expand a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + public String resolveClassName(ASTList name) throws CompileError { + if (name == null) + return null; + else + return javaToJvmName(lookupClassByName(name).getName()); + } + + /* Expands a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + public String resolveJvmClassName(String jvmName) throws CompileError { + if (jvmName == null) + return null; + else + return javaToJvmName(lookupClassByJvmName(jvmName).getName()); + } + + public static CtClass getSuperclass(CtClass c) throws CompileError { + try { + CtClass sc = c.getSuperclass(); + if (sc != null) + return sc; + } + catch (NotFoundException e) {} + throw new CompileError("cannot find the super class of " + + c.getName()); + } + + public static CtClass getSuperInterface(CtClass c, String interfaceName) + throws CompileError + { + try { + CtClass[] intfs = c.getInterfaces(); + for (int i = 0; i < intfs.length; i++) + if (intfs[i].getName().equals(interfaceName)) + return intfs[i]; + } catch (NotFoundException e) {} + throw new CompileError("cannot find the super inetrface " + interfaceName + + " of " + c.getName()); + } + + public static String javaToJvmName(String classname) { + return classname.replace('.', '/'); + } + + public static String jvmToJavaName(String classname) { + return classname.replace('/', '.'); + } + + public static int descToType(char c) throws CompileError { + switch (c) { + case 'Z' : + return BOOLEAN; + case 'C' : + return CHAR; + case 'B' : + return BYTE; + case 'S' : + return SHORT; + case 'I' : + return INT; + case 'J' : + return LONG; + case 'F' : + return FLOAT; + case 'D' : + return DOUBLE; + case 'V' : + return VOID; + case 'L' : + case '[' : + return CLASS; + default : + fatal(); + return VOID; // never reach here + } + } + + public static int getModifiers(ASTList mods) { + int m = 0; + while (mods != null) { + Keyword k = (Keyword)mods.head(); + mods = mods.tail(); + switch (k.get()) { + case STATIC : + m |= Modifier.STATIC; + break; + case FINAL : + m |= Modifier.FINAL; + break; + case SYNCHRONIZED : + m |= Modifier.SYNCHRONIZED; + break; + case ABSTRACT : + m |= Modifier.ABSTRACT; + break; + case PUBLIC : + m |= Modifier.PUBLIC; + break; + case PROTECTED : + m |= Modifier.PROTECTED; + break; + case PRIVATE : + m |= Modifier.PRIVATE; + break; + case VOLATILE : + m |= Modifier.VOLATILE; + break; + case TRANSIENT : + m |= Modifier.TRANSIENT; + break; + case STRICT : + m |= Modifier.STRICT; + break; + } + } + + return m; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java b/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java new file mode 100644 index 0000000..5b35107 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java @@ -0,0 +1,40 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.compiler.ast.ASTree; + +public class NoFieldException extends CompileError { + private String fieldName; + private ASTree expr; + + /* NAME must be JVM-internal representation. + */ + public NoFieldException(String name, ASTree e) { + super("no such field: " + name); + fieldName = name; + expr = e; + } + + /* The returned name should be JVM-internal representation. + */ + public String getField() { return fieldName; } + + /* Returns the expression where this exception is thrown. + */ + public ASTree getExpr() { return expr; } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java b/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java new file mode 100644 index 0000000..4e15650 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java @@ -0,0 +1,1345 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.compiler.ast.*; + +public final class Parser implements TokenId { + private Lex lex; + + public Parser(Lex lex) { + this.lex = lex; + } + + public boolean hasMore() { return lex.lookAhead() >= 0; } + + /* member.declaration + * : method.declaration | field.declaration + */ + public ASTList parseMember(SymbolTable tbl) throws CompileError { + ASTList mem = parseMember1(tbl); + if (mem instanceof MethodDecl) + return parseMethod2(tbl, (MethodDecl)mem); + else + return mem; + } + + /* A method body is not parsed. + */ + public ASTList parseMember1(SymbolTable tbl) throws CompileError { + ASTList mods = parseMemberMods(); + Declarator d; + boolean isConstructor = false; + if (lex.lookAhead() == Identifier && lex.lookAhead(1) == '(') { + d = new Declarator(VOID, 0); + isConstructor = true; + } + else + d = parseFormalType(tbl); + + if (lex.get() != Identifier) + throw new SyntaxError(lex); + + String name; + if (isConstructor) + name = MethodDecl.initName; + else + name = lex.getString(); + + d.setVariable(new Symbol(name)); + if (isConstructor || lex.lookAhead() == '(') + return parseMethod1(tbl, isConstructor, mods, d); + else + return parseField(tbl, mods, d); + } + + /* field.declaration + * : member.modifiers + * formal.type Identifier + * [ "=" expression ] ";" + */ + private FieldDecl parseField(SymbolTable tbl, ASTList mods, + Declarator d) throws CompileError + { + ASTree expr = null; + if (lex.lookAhead() == '=') { + lex.get(); + expr = parseExpression(tbl); + } + + int c = lex.get(); + if (c == ';') + return new FieldDecl(mods, new ASTList(d, new ASTList(expr))); + else if (c == ',') + throw new CompileError( + "only one field can be declared in one declaration", lex); + else + throw new SyntaxError(lex); + } + + /* method.declaration + * : member.modifiers + * [ formal.type ] + * Identifier "(" [ formal.parameter ( "," formal.parameter )* ] ")" + * array.dimension + * [ THROWS class.type ( "," class.type ) ] + * ( block.statement | ";" ) + * + * Note that a method body is not parsed. + */ + private MethodDecl parseMethod1(SymbolTable tbl, boolean isConstructor, + ASTList mods, Declarator d) + throws CompileError + { + if (lex.get() != '(') + throw new SyntaxError(lex); + + ASTList parms = null; + if (lex.lookAhead() != ')') + while (true) { + parms = ASTList.append(parms, parseFormalParam(tbl)); + int t = lex.lookAhead(); + if (t == ',') + lex.get(); + else if (t == ')') + break; + } + + lex.get(); // ')' + d.addArrayDim(parseArrayDimension()); + if (isConstructor && d.getArrayDim() > 0) + throw new SyntaxError(lex); + + ASTList throwsList = null; + if (lex.lookAhead() == THROWS) { + lex.get(); + while (true) { + throwsList = ASTList.append(throwsList, parseClassType(tbl)); + if (lex.lookAhead() == ',') + lex.get(); + else + break; + } + } + + return new MethodDecl(mods, new ASTList(d, + ASTList.make(parms, throwsList, null))); + } + + /* Parses a method body. + */ + public MethodDecl parseMethod2(SymbolTable tbl, MethodDecl md) + throws CompileError + { + Stmnt body = null; + if (lex.lookAhead() == ';') + lex.get(); + else { + body = parseBlock(tbl); + if (body == null) + body = new Stmnt(BLOCK); + } + + md.sublist(4).setHead(body); + return md; + } + + /* member.modifiers + * : ( FINAL | SYNCHRONIZED | ABSTRACT + * | PUBLIC | PROTECTED | PRIVATE | STATIC + * | VOLATILE | TRANSIENT | STRICT )* + */ + private ASTList parseMemberMods() { + int t; + ASTList list = null; + while (true) { + t = lex.lookAhead(); + if (t == ABSTRACT || t == FINAL || t == PUBLIC || t == PROTECTED + || t == PRIVATE || t == SYNCHRONIZED || t == STATIC + || t == VOLATILE || t == TRANSIENT || t == STRICT) + list = new ASTList(new Keyword(lex.get()), list); + else + break; + } + + return list; + } + + /* formal.type : ( build-in-type | class.type ) array.dimension + */ + private Declarator parseFormalType(SymbolTable tbl) throws CompileError { + int t = lex.lookAhead(); + if (isBuiltinType(t) || t == VOID) { + lex.get(); // primitive type + int dim = parseArrayDimension(); + return new Declarator(t, dim); + } + else { + ASTList name = parseClassType(tbl); + int dim = parseArrayDimension(); + return new Declarator(name, dim); + } + } + + private static boolean isBuiltinType(int t) { + return (t == BOOLEAN || t == BYTE || t == CHAR || t == SHORT + || t == INT || t == LONG || t == FLOAT || t == DOUBLE); + } + + /* formal.parameter : formal.type Identifier array.dimension + */ + private Declarator parseFormalParam(SymbolTable tbl) + throws CompileError + { + Declarator d = parseFormalType(tbl); + if (lex.get() != Identifier) + throw new SyntaxError(lex); + + String name = lex.getString(); + d.setVariable(new Symbol(name)); + d.addArrayDim(parseArrayDimension()); + tbl.append(name, d); + return d; + } + + /* statement : [ label ":" ]* labeled.statement + * + * labeled.statement + * : block.statement + * | if.statement + * | while.statement + * | do.statement + * | for.statement + * | switch.statement + * | try.statement + * | return.statement + * | thorw.statement + * | break.statement + * | continue.statement + * | declaration.or.expression + * | ";" + * + * This method may return null (empty statement). + */ + public Stmnt parseStatement(SymbolTable tbl) + throws CompileError + { + int t = lex.lookAhead(); + if (t == '{') + return parseBlock(tbl); + else if (t == ';') { + lex.get(); + return new Stmnt(BLOCK); // empty statement + } + else if (t == Identifier && lex.lookAhead(1) == ':') { + lex.get(); // Identifier + String label = lex.getString(); + lex.get(); // ':' + return Stmnt.make(LABEL, new Symbol(label), parseStatement(tbl)); + } + else if (t == IF) + return parseIf(tbl); + else if (t == WHILE) + return parseWhile(tbl); + else if (t == DO) + return parseDo(tbl); + else if (t == FOR) + return parseFor(tbl); + else if (t == TRY) + return parseTry(tbl); + else if (t == SWITCH) + return parseSwitch(tbl); + else if (t == SYNCHRONIZED) + return parseSynchronized(tbl); + else if (t == RETURN) + return parseReturn(tbl); + else if (t == THROW) + return parseThrow(tbl); + else if (t == BREAK) + return parseBreak(tbl); + else if (t == CONTINUE) + return parseContinue(tbl); + else + return parseDeclarationOrExpression(tbl, false); + } + + /* block.statement : "{" statement* "}" + */ + private Stmnt parseBlock(SymbolTable tbl) throws CompileError { + if (lex.get() != '{') + throw new SyntaxError(lex); + + Stmnt body = null; + SymbolTable tbl2 = new SymbolTable(tbl); + while (lex.lookAhead() != '}') { + Stmnt s = parseStatement(tbl2); + if (s != null) + body = (Stmnt)ASTList.concat(body, new Stmnt(BLOCK, s)); + } + + lex.get(); // '}' + if (body == null) + return new Stmnt(BLOCK); // empty block + else + return body; + } + + /* if.statement : IF "(" expression ")" statement + * [ ELSE statement ] + */ + private Stmnt parseIf(SymbolTable tbl) throws CompileError { + int t = lex.get(); // IF + ASTree expr = parseParExpression(tbl); + Stmnt thenp = parseStatement(tbl); + Stmnt elsep; + if (lex.lookAhead() == ELSE) { + lex.get(); + elsep = parseStatement(tbl); + } + else + elsep = null; + + return new Stmnt(t, expr, new ASTList(thenp, new ASTList(elsep))); + } + + /* while.statement : WHILE "(" expression ")" statement + */ + private Stmnt parseWhile(SymbolTable tbl) + throws CompileError + { + int t = lex.get(); // WHILE + ASTree expr = parseParExpression(tbl); + Stmnt body = parseStatement(tbl); + return new Stmnt(t, expr, body); + } + + /* do.statement : DO statement WHILE "(" expression ")" ";" + */ + private Stmnt parseDo(SymbolTable tbl) throws CompileError { + int t = lex.get(); // DO + Stmnt body = parseStatement(tbl); + if (lex.get() != WHILE || lex.get() != '(') + throw new SyntaxError(lex); + + ASTree expr = parseExpression(tbl); + if (lex.get() != ')' || lex.get() != ';') + throw new SyntaxError(lex); + + return new Stmnt(t, expr, body); + } + + /* for.statement : FOR "(" decl.or.expr expression ";" expression ")" + * statement + */ + private Stmnt parseFor(SymbolTable tbl) throws CompileError { + Stmnt expr1, expr3; + ASTree expr2; + int t = lex.get(); // FOR + + SymbolTable tbl2 = new SymbolTable(tbl); + + if (lex.get() != '(') + throw new SyntaxError(lex); + + if (lex.lookAhead() == ';') { + lex.get(); + expr1 = null; + } + else + expr1 = parseDeclarationOrExpression(tbl2, true); + + if (lex.lookAhead() == ';') + expr2 = null; + else + expr2 = parseExpression(tbl2); + + if (lex.get() != ';') + throw new CompileError("; is missing", lex); + + if (lex.lookAhead() == ')') + expr3 = null; + else + expr3 = parseExprList(tbl2); + + if (lex.get() != ')') + throw new CompileError(") is missing", lex); + + Stmnt body = parseStatement(tbl2); + return new Stmnt(t, expr1, new ASTList(expr2, + new ASTList(expr3, body))); + } + + /* switch.statement : SWITCH "(" expression ")" "{" switch.block "}" + * + * swtich.block : ( switch.label statement* )* + * + * swtich.label : DEFAULT ":" + * | CASE const.expression ":" + */ + private Stmnt parseSwitch(SymbolTable tbl) throws CompileError { + int t = lex.get(); // SWITCH + ASTree expr = parseParExpression(tbl); + Stmnt body = parseSwitchBlock(tbl); + return new Stmnt(t, expr, body); + } + + private Stmnt parseSwitchBlock(SymbolTable tbl) throws CompileError { + if (lex.get() != '{') + throw new SyntaxError(lex); + + SymbolTable tbl2 = new SymbolTable(tbl); + Stmnt s = parseStmntOrCase(tbl2); + if (s == null) + throw new CompileError("empty switch block", lex); + + int op = s.getOperator(); + if (op != CASE && op != DEFAULT) + throw new CompileError("no case or default in a switch block", + lex); + + Stmnt body = new Stmnt(BLOCK, s); + while (lex.lookAhead() != '}') { + Stmnt s2 = parseStmntOrCase(tbl2); + if (s2 != null) { + int op2 = s2.getOperator(); + if (op2 == CASE || op2 == DEFAULT) { + body = (Stmnt)ASTList.concat(body, new Stmnt(BLOCK, s2)); + s = s2; + } + else + s = (Stmnt)ASTList.concat(s, new Stmnt(BLOCK, s2)); + } + } + + lex.get(); // '}' + return body; + } + + private Stmnt parseStmntOrCase(SymbolTable tbl) throws CompileError { + int t = lex.lookAhead(); + if (t != CASE && t != DEFAULT) + return parseStatement(tbl); + + lex.get(); + Stmnt s; + if (t == CASE) + s = new Stmnt(t, parseExpression(tbl)); + else + s = new Stmnt(DEFAULT); + + if (lex.get() != ':') + throw new CompileError(": is missing", lex); + + return s; + } + + /* synchronized.statement : + * SYNCHRONIZED "(" expression ")" block.statement + */ + private Stmnt parseSynchronized(SymbolTable tbl) throws CompileError { + int t = lex.get(); // SYNCHRONIZED + if (lex.get() != '(') + throw new SyntaxError(lex); + + ASTree expr = parseExpression(tbl); + if (lex.get() != ')') + throw new SyntaxError(lex); + + Stmnt body = parseBlock(tbl); + return new Stmnt(t, expr, body); + } + + /* try.statement + * : TRY block.statement + * [ CATCH "(" class.type Identifier ")" block.statement ]* + * [ FINALLY block.statement ]* + */ + private Stmnt parseTry(SymbolTable tbl) throws CompileError { + lex.get(); // TRY + Stmnt block = parseBlock(tbl); + ASTList catchList = null; + while (lex.lookAhead() == CATCH) { + lex.get(); // CATCH + if (lex.get() != '(') + throw new SyntaxError(lex); + + SymbolTable tbl2 = new SymbolTable(tbl); + Declarator d = parseFormalParam(tbl2); + if (d.getArrayDim() > 0 || d.getType() != CLASS) + throw new SyntaxError(lex); + + if (lex.get() != ')') + throw new SyntaxError(lex); + + Stmnt b = parseBlock(tbl2); + catchList = ASTList.append(catchList, new Pair(d, b)); + } + + Stmnt finallyBlock = null; + if (lex.lookAhead() == FINALLY) { + lex.get(); // FINALLY + finallyBlock = parseBlock(tbl); + } + + return Stmnt.make(TRY, block, catchList, finallyBlock); + } + + /* return.statement : RETURN [ expression ] ";" + */ + private Stmnt parseReturn(SymbolTable tbl) throws CompileError { + int t = lex.get(); // RETURN + Stmnt s = new Stmnt(t); + if (lex.lookAhead() != ';') + s.setLeft(parseExpression(tbl)); + + if (lex.get() != ';') + throw new CompileError("; is missing", lex); + + return s; + } + + /* throw.statement : THROW expression ";" + */ + private Stmnt parseThrow(SymbolTable tbl) throws CompileError { + int t = lex.get(); // THROW + ASTree expr = parseExpression(tbl); + if (lex.get() != ';') + throw new CompileError("; is missing", lex); + + return new Stmnt(t, expr); + } + + /* break.statement : BREAK [ Identifier ] ";" + */ + private Stmnt parseBreak(SymbolTable tbl) + throws CompileError + { + return parseContinue(tbl); + } + + /* continue.statement : CONTINUE [ Identifier ] ";" + */ + private Stmnt parseContinue(SymbolTable tbl) + throws CompileError + { + int t = lex.get(); // CONTINUE + Stmnt s = new Stmnt(t); + int t2 = lex.get(); + if (t2 == Identifier) { + s.setLeft(new Symbol(lex.getString())); + t2 = lex.get(); + } + + if (t2 != ';') + throw new CompileError("; is missing", lex); + + return s; + } + + /* declaration.or.expression + * : [ FINAL ] built-in-type array.dimension declarators + * | [ FINAL ] class.type array.dimension declarators + * | expression ';' + * | expr.list ';' if exprList is true + * + * Note: FINAL is currently ignored. This must be fixed + * in future. + */ + private Stmnt parseDeclarationOrExpression(SymbolTable tbl, + boolean exprList) + throws CompileError + { + int t = lex.lookAhead(); + while (t == FINAL) { + lex.get(); + t = lex.lookAhead(); + } + + if (isBuiltinType(t)) { + t = lex.get(); + int dim = parseArrayDimension(); + return parseDeclarators(tbl, new Declarator(t, dim)); + } + else if (t == Identifier) { + int i = nextIsClassType(0); + if (i >= 0) + if (lex.lookAhead(i) == Identifier) { + ASTList name = parseClassType(tbl); + int dim = parseArrayDimension(); + return parseDeclarators(tbl, new Declarator(name, dim)); + } + } + + Stmnt expr; + if (exprList) + expr = parseExprList(tbl); + else + expr = new Stmnt(EXPR, parseExpression(tbl)); + + if (lex.get() != ';') + throw new CompileError("; is missing", lex); + + return expr; + } + + /* expr.list : ( expression ',')* expression + */ + private Stmnt parseExprList(SymbolTable tbl) throws CompileError { + Stmnt expr = null; + for (;;) { + Stmnt e = new Stmnt(EXPR, parseExpression(tbl)); + expr = (Stmnt)ASTList.concat(expr, new Stmnt(BLOCK, e)); + if (lex.lookAhead() == ',') + lex.get(); + else + return expr; + } + } + + /* declarators : declarator [ ',' declarator ]* ';' + */ + private Stmnt parseDeclarators(SymbolTable tbl, Declarator d) + throws CompileError + { + Stmnt decl = null; + for (;;) { + decl = (Stmnt)ASTList.concat(decl, + new Stmnt(DECL, parseDeclarator(tbl, d))); + int t = lex.get(); + if (t == ';') + return decl; + else if (t != ',') + throw new CompileError("; is missing", lex); + } + } + + /* declarator : Identifier array.dimension [ '=' initializer ] + */ + private Declarator parseDeclarator(SymbolTable tbl, Declarator d) + throws CompileError + { + if (lex.get() != Identifier || d.getType() == VOID) + throw new SyntaxError(lex); + + String name = lex.getString(); + Symbol symbol = new Symbol(name); + int dim = parseArrayDimension(); + ASTree init = null; + if (lex.lookAhead() == '=') { + lex.get(); + init = parseInitializer(tbl); + } + + Declarator decl = d.make(symbol, dim, init); + tbl.append(name, decl); + return decl; + } + + /* initializer : expression | array.initializer + */ + private ASTree parseInitializer(SymbolTable tbl) throws CompileError { + if (lex.lookAhead() == '{') + return parseArrayInitializer(tbl); + else + return parseExpression(tbl); + } + + /* array.initializer : + * '{' (( array.initializer | expression ) ',')* '}' + */ + private ArrayInit parseArrayInitializer(SymbolTable tbl) + throws CompileError + { + lex.get(); // '{' + ASTree expr = parseExpression(tbl); + ArrayInit init = new ArrayInit(expr); + while (lex.lookAhead() == ',') { + lex.get(); + expr = parseExpression(tbl); + ASTList.append(init, expr); + } + + if (lex.get() != '}') + throw new SyntaxError(lex); + + return init; + } + + /* par.expression : '(' expression ')' + */ + private ASTree parseParExpression(SymbolTable tbl) throws CompileError { + if (lex.get() != '(') + throw new SyntaxError(lex); + + ASTree expr = parseExpression(tbl); + if (lex.get() != ')') + throw new SyntaxError(lex); + + return expr; + } + + /* expression : conditional.expr + * | conditional.expr assign.op expression (right-to-left) + */ + public ASTree parseExpression(SymbolTable tbl) throws CompileError { + ASTree left = parseConditionalExpr(tbl); + if (!isAssignOp(lex.lookAhead())) + return left; + + int t = lex.get(); + ASTree right = parseExpression(tbl); + return AssignExpr.makeAssign(t, left, right); + } + + private static boolean isAssignOp(int t) { + return t == '=' || t == MOD_E || t == AND_E + || t == MUL_E || t == PLUS_E || t == MINUS_E || t == DIV_E + || t == EXOR_E || t == OR_E || t == LSHIFT_E + || t == RSHIFT_E || t == ARSHIFT_E; + } + + /* conditional.expr (right-to-left) + * : logical.or.expr [ '?' expression ':' conditional.expr ] + */ + private ASTree parseConditionalExpr(SymbolTable tbl) throws CompileError { + ASTree cond = parseBinaryExpr(tbl); + if (lex.lookAhead() == '?') { + lex.get(); + ASTree thenExpr = parseExpression(tbl); + if (lex.get() != ':') + throw new CompileError(": is missing", lex); + + ASTree elseExpr = parseExpression(tbl); + return new CondExpr(cond, thenExpr, elseExpr); + } + else + return cond; + } + + /* logical.or.expr 10 (operator precedence) + * : logical.and.expr + * | logical.or.expr OROR logical.and.expr left-to-right + * + * logical.and.expr 9 + * : inclusive.or.expr + * | logical.and.expr ANDAND inclusive.or.expr + * + * inclusive.or.expr 8 + * : exclusive.or.expr + * | inclusive.or.expr "|" exclusive.or.expr + * + * exclusive.or.expr 7 + * : and.expr + * | exclusive.or.expr "^" and.expr + * + * and.expr 6 + * : equality.expr + * | and.expr "&" equality.expr + * + * equality.expr 5 + * : relational.expr + * | equality.expr (EQ | NEQ) relational.expr + * + * relational.expr 4 + * : shift.expr + * | relational.expr (LE | GE | "<" | ">") shift.expr + * | relational.expr INSTANCEOF class.type ("[" "]")* + * + * shift.expr 3 + * : additive.expr + * | shift.expr (LSHIFT | RSHIFT | ARSHIFT) additive.expr + * + * additive.expr 2 + * : multiply.expr + * | additive.expr ("+" | "-") multiply.expr + * + * multiply.expr 1 + * : unary.expr + * | multiply.expr ("*" | "/" | "%") unary.expr + */ + private ASTree parseBinaryExpr(SymbolTable tbl) throws CompileError { + ASTree expr = parseUnaryExpr(tbl); + for (;;) { + int t = lex.lookAhead(); + int p = getOpPrecedence(t); + if (p == 0) + return expr; + else + expr = binaryExpr2(tbl, expr, p); + } + } + + private ASTree parseInstanceOf(SymbolTable tbl, ASTree expr) + throws CompileError + { + int t = lex.lookAhead(); + if (isBuiltinType(t)) { + lex.get(); // primitive type + int dim = parseArrayDimension(); + return new InstanceOfExpr(t, dim, expr); + } + else { + ASTList name = parseClassType(tbl); + int dim = parseArrayDimension(); + return new InstanceOfExpr(name, dim, expr); + } + } + + private ASTree binaryExpr2(SymbolTable tbl, ASTree expr, int prec) + throws CompileError + { + int t = lex.get(); + if (t == INSTANCEOF) + return parseInstanceOf(tbl, expr); + + ASTree expr2 = parseUnaryExpr(tbl); + for (;;) { + int t2 = lex.lookAhead(); + int p2 = getOpPrecedence(t2); + if (p2 != 0 && prec > p2) + expr2 = binaryExpr2(tbl, expr2, p2); + else + return BinExpr.makeBin(t, expr, expr2); + } + } + + // !"#$%&'( )*+,-./0 12345678 9:;<=>? + private static final int[] binaryOpPrecedence + = { 0, 0, 0, 0, 1, 6, 0, 0, + 0, 1, 2, 0, 2, 0, 1, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 4, 0, 4, 0 }; + + private int getOpPrecedence(int c) { + if ('!' <= c && c <= '?') + return binaryOpPrecedence[c - '!']; + else if (c == '^') + return 7; + else if (c == '|') + return 8; + else if (c == ANDAND) + return 9; + else if (c == OROR) + return 10; + else if (c == EQ || c == NEQ) + return 5; + else if (c == LE || c == GE || c == INSTANCEOF) + return 4; + else if (c == LSHIFT || c == RSHIFT || c == ARSHIFT) + return 3; + else + return 0; // not a binary operator + } + + /* unary.expr : "++"|"--" unary.expr + | "+"|"-" unary.expr + | "!"|"~" unary.expr + | cast.expr + | postfix.expr + + unary.expr.not.plus.minus is a unary expression starting without + "+", "-", "++", or "--". + */ + private ASTree parseUnaryExpr(SymbolTable tbl) throws CompileError { + int t; + switch (lex.lookAhead()) { + case '+' : + case '-' : + case PLUSPLUS : + case MINUSMINUS : + case '!' : + case '~' : + t = lex.get(); + if (t == '-') { + int t2 = lex.lookAhead(); + switch (t2) { + case LongConstant : + case IntConstant : + case CharConstant : + lex.get(); + return new IntConst(-lex.getLong(), t2); + case DoubleConstant : + case FloatConstant : + lex.get(); + return new DoubleConst(-lex.getDouble(), t2); + default : + break; + } + } + + return Expr.make(t, parseUnaryExpr(tbl)); + case '(' : + return parseCast(tbl); + default : + return parsePostfix(tbl); + } + } + + /* cast.expr : "(" builtin.type ("[" "]")* ")" unary.expr + | "(" class.type ("[" "]")* ")" unary.expr2 + + unary.expr2 is a unary.expr beginning with "(", NULL, StringL, + Identifier, THIS, SUPER, or NEW. + + Either "(int.class)" or "(String[].class)" is a not cast expression. + */ + private ASTree parseCast(SymbolTable tbl) throws CompileError { + int t = lex.lookAhead(1); + if (isBuiltinType(t) && nextIsBuiltinCast()) { + lex.get(); // '(' + lex.get(); // primitive type + int dim = parseArrayDimension(); + if (lex.get() != ')') + throw new CompileError(") is missing", lex); + + return new CastExpr(t, dim, parseUnaryExpr(tbl)); + } + else if (t == Identifier && nextIsClassCast()) { + lex.get(); // '(' + ASTList name = parseClassType(tbl); + int dim = parseArrayDimension(); + if (lex.get() != ')') + throw new CompileError(") is missing", lex); + + return new CastExpr(name, dim, parseUnaryExpr(tbl)); + } + else + return parsePostfix(tbl); + } + + private boolean nextIsBuiltinCast() { + int t; + int i = 2; + while ((t = lex.lookAhead(i++)) == '[') + if (lex.lookAhead(i++) != ']') + return false; + + return lex.lookAhead(i - 1) == ')'; + } + + private boolean nextIsClassCast() { + int i = nextIsClassType(1); + if (i < 0) + return false; + + int t = lex.lookAhead(i); + if (t != ')') + return false; + + t = lex.lookAhead(i + 1); + return t == '(' || t == NULL || t == StringL + || t == Identifier || t == THIS || t == SUPER || t == NEW + || t == TRUE || t == FALSE || t == LongConstant + || t == IntConstant || t == CharConstant + || t == DoubleConstant || t == FloatConstant; + } + + private int nextIsClassType(int i) { + int t; + while (lex.lookAhead(++i) == '.') + if (lex.lookAhead(++i) != Identifier) + return -1; + + while ((t = lex.lookAhead(i++)) == '[') + if (lex.lookAhead(i++) != ']') + return -1; + + return i - 1; + } + + /* array.dimension : [ "[" "]" ]* + */ + private int parseArrayDimension() throws CompileError { + int arrayDim = 0; + while (lex.lookAhead() == '[') { + ++arrayDim; + lex.get(); + if (lex.get() != ']') + throw new CompileError("] is missing", lex); + } + + return arrayDim; + } + + /* class.type : Identifier ( "." Identifier )* + */ + private ASTList parseClassType(SymbolTable tbl) throws CompileError { + ASTList list = null; + for (;;) { + if (lex.get() != Identifier) + throw new SyntaxError(lex); + + list = ASTList.append(list, new Symbol(lex.getString())); + if (lex.lookAhead() == '.') + lex.get(); + else + break; + } + + return list; + } + + /* postfix.expr : number.literal + * | primary.expr + * | method.expr + * | postfix.expr "++" | "--" + * | postfix.expr "[" array.size "]" + * | postfix.expr "." Identifier + * | postfix.expr ( "[" "]" )* "." CLASS + * | postfix.expr "#" Identifier + * | postfix.expr "." SUPER + * + * "#" is not an operator of regular Java. It separates + * a class name and a member name in an expression for static member + * access. For example, + * java.lang.Integer.toString(3) in regular Java + * can be written like this: + * java.lang.Integer#toString(3) for this compiler. + */ + private ASTree parsePostfix(SymbolTable tbl) throws CompileError { + int token = lex.lookAhead(); + switch (token) { // see also parseUnaryExpr() + case LongConstant : + case IntConstant : + case CharConstant : + lex.get(); + return new IntConst(lex.getLong(), token); + case DoubleConstant : + case FloatConstant : + lex.get(); + return new DoubleConst(lex.getDouble(), token); + default : + break; + } + + String str; + ASTree index; + ASTree expr = parsePrimaryExpr(tbl); + int t; + while (true) { + switch (lex.lookAhead()) { + case '(' : + expr = parseMethodCall(tbl, expr); + break; + case '[' : + if (lex.lookAhead(1) == ']') { + int dim = parseArrayDimension(); + if (lex.get() != '.' || lex.get() != CLASS) + throw new SyntaxError(lex); + + expr = parseDotClass(expr, dim); + } + else { + index = parseArrayIndex(tbl); + if (index == null) + throw new SyntaxError(lex); + + expr = Expr.make(ARRAY, expr, index); + } + break; + case PLUSPLUS : + case MINUSMINUS : + t = lex.get(); + expr = Expr.make(t, null, expr); + break; + case '.' : + lex.get(); + t = lex.get(); + if (t == CLASS) + expr = parseDotClass(expr, 0); + else if (t == SUPER) + expr = Expr.make('.', new Symbol(toClassName(expr)), new Keyword(t)); + else if (t == Identifier) { + str = lex.getString(); + expr = Expr.make('.', expr, new Member(str)); + } + else + throw new CompileError("missing member name", lex); + break; + case '#' : + lex.get(); + t = lex.get(); + if (t != Identifier) + throw new CompileError("missing static member name", lex); + + str = lex.getString(); + expr = Expr.make(MEMBER, new Symbol(toClassName(expr)), + new Member(str)); + break; + default : + return expr; + } + } + } + + /* Parse a .class expression on a class type. For example, + * String.class => ('.' "String" "class") + * String[].class => ('.' "[LString;" "class") + */ + private ASTree parseDotClass(ASTree className, int dim) + throws CompileError + { + String cname = toClassName(className); + if (dim > 0) { + StringBuffer sbuf = new StringBuffer(); + while (dim-- > 0) + sbuf.append('['); + + sbuf.append('L').append(cname.replace('.', '/')).append(';'); + cname = sbuf.toString(); + } + + return Expr.make('.', new Symbol(cname), new Member("class")); + } + + /* Parses a .class expression on a built-in type. For example, + * int.class => ('#' "java.lang.Integer" "TYPE") + * int[].class => ('.' "[I", "class") + */ + private ASTree parseDotClass(int builtinType, int dim) + throws CompileError + { + if (dim > 0) { + String cname = CodeGen.toJvmTypeName(builtinType, dim); + return Expr.make('.', new Symbol(cname), new Member("class")); + } + else { + String cname; + switch(builtinType) { + case BOOLEAN : + cname = "java.lang.Boolean"; + break; + case BYTE : + cname = "java.lang.Byte"; + break; + case CHAR : + cname = "java.lang.Character"; + break; + case SHORT : + cname = "java.lang.Short"; + break; + case INT : + cname = "java.lang.Integer"; + break; + case LONG : + cname = "java.lang.Long"; + break; + case FLOAT : + cname = "java.lang.Float"; + break; + case DOUBLE : + cname = "java.lang.Double"; + break; + case VOID : + cname = "java.lang.Void"; + break; + default : + throw new CompileError("invalid builtin type: " + + builtinType); + } + + return Expr.make(MEMBER, new Symbol(cname), new Member("TYPE")); + } + } + + /* method.call : method.expr "(" argument.list ")" + * method.expr : THIS | SUPER | Identifier + * | postfix.expr "." Identifier + * | postfix.expr "#" Identifier + */ + private ASTree parseMethodCall(SymbolTable tbl, ASTree expr) + throws CompileError + { + if (expr instanceof Keyword) { + int token = ((Keyword)expr).get(); + if (token != THIS && token != SUPER) + throw new SyntaxError(lex); + } + else if (expr instanceof Symbol) // Identifier + ; + else if (expr instanceof Expr) { + int op = ((Expr)expr).getOperator(); + if (op != '.' && op != MEMBER) + throw new SyntaxError(lex); + } + + return CallExpr.makeCall(expr, parseArgumentList(tbl)); + } + + private String toClassName(ASTree name) + throws CompileError + { + StringBuffer sbuf = new StringBuffer(); + toClassName(name, sbuf); + return sbuf.toString(); + } + + private void toClassName(ASTree name, StringBuffer sbuf) + throws CompileError + { + if (name instanceof Symbol) { + sbuf.append(((Symbol)name).get()); + return; + } + else if (name instanceof Expr) { + Expr expr = (Expr)name; + if (expr.getOperator() == '.') { + toClassName(expr.oprand1(), sbuf); + sbuf.append('.'); + toClassName(expr.oprand2(), sbuf); + return; + } + } + + throw new CompileError("bad static member access", lex); + } + + /* primary.expr : THIS | SUPER | TRUE | FALSE | NULL + * | StringL + * | Identifier + * | NEW new.expr + * | "(" expression ")" + * | builtin.type ( "[" "]" )* "." CLASS + * + * Identifier represents either a local variable name, a member name, + * or a class name. + */ + private ASTree parsePrimaryExpr(SymbolTable tbl) throws CompileError { + int t; + String name; + Declarator decl; + ASTree expr; + + switch (t = lex.get()) { + case THIS : + case SUPER : + case TRUE : + case FALSE : + case NULL : + return new Keyword(t); + case Identifier : + name = lex.getString(); + decl = tbl.lookup(name); + if (decl == null) + return new Member(name); // this or static member + else + return new Variable(name, decl); // local variable + case StringL : + return new StringL(lex.getString()); + case NEW : + return parseNew(tbl); + case '(' : + expr = parseExpression(tbl); + if (lex.get() == ')') + return expr; + else + throw new CompileError(") is missing", lex); + default : + if (isBuiltinType(t) || t == VOID) { + int dim = parseArrayDimension(); + if (lex.get() == '.' && lex.get() == CLASS) + return parseDotClass(t, dim); + } + + throw new SyntaxError(lex); + } + } + + /* new.expr : class.type "(" argument.list ")" + * | class.type array.size [ array.initializer ] + * | primitive.type array.size [ array.initializer ] + */ + private NewExpr parseNew(SymbolTable tbl) throws CompileError { + ArrayInit init = null; + int t = lex.lookAhead(); + if (isBuiltinType(t)) { + lex.get(); + ASTList size = parseArraySize(tbl); + if (lex.lookAhead() == '{') + init = parseArrayInitializer(tbl); + + return new NewExpr(t, size, init); + } + else if (t == Identifier) { + ASTList name = parseClassType(tbl); + t = lex.lookAhead(); + if (t == '(') { + ASTList args = parseArgumentList(tbl); + return new NewExpr(name, args); + } + else if (t == '[') { + ASTList size = parseArraySize(tbl); + if (lex.lookAhead() == '{') + init = parseArrayInitializer(tbl); + + return NewExpr.makeObjectArray(name, size, init); + } + } + + throw new SyntaxError(lex); + } + + /* array.size : [ array.index ]* + */ + private ASTList parseArraySize(SymbolTable tbl) throws CompileError { + ASTList list = null; + while (lex.lookAhead() == '[') + list = ASTList.append(list, parseArrayIndex(tbl)); + + return list; + } + + /* array.index : "[" [ expression ] "]" + */ + private ASTree parseArrayIndex(SymbolTable tbl) throws CompileError { + lex.get(); // '[' + if (lex.lookAhead() == ']') { + lex.get(); + return null; + } + else { + ASTree index = parseExpression(tbl); + if (lex.get() != ']') + throw new CompileError("] is missing", lex); + + return index; + } + } + + /* argument.list : "(" [ expression [ "," expression ]* ] ")" + */ + private ASTList parseArgumentList(SymbolTable tbl) throws CompileError { + if (lex.get() != '(') + throw new CompileError("( is missing", lex); + + ASTList list = null; + if (lex.lookAhead() != ')') + for (;;) { + list = ASTList.append(list, parseExpression(tbl)); + if (lex.lookAhead() == ',') + lex.get(); + else + break; + } + + if (lex.get() != ')') + throw new CompileError(") is missing", lex); + + return list; + } +} + diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java new file mode 100644 index 0000000..7cb7ef4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java @@ -0,0 +1,30 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.bytecode.Bytecode; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * An interface to an object for implementing $proceed(). + * + * @see javassist.compiler.JvstCodeGen#setProceedHandler(ProceedHandler, String) + */ +public interface ProceedHandler { + void doit(JvstCodeGen gen, Bytecode b, ASTList args) throws CompileError; + void setReturnType(JvstTypeChecker c, ASTList args) throws CompileError; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java b/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java new file mode 100644 index 0000000..1a3edc0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java @@ -0,0 +1,45 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import java.util.HashMap; +import com.wenshuo.agent.javassist.compiler.ast.Declarator; + +public final class SymbolTable extends HashMap { + private SymbolTable parent; + + public SymbolTable() { this(null); } + + public SymbolTable(SymbolTable p) { + super(); + parent = p; + } + + public SymbolTable getParent() { return parent; } + + public Declarator lookup(String name) { + Declarator found = (Declarator)get(name); + if (found == null && parent != null) + return parent.lookup(name); + else + return found; + } + + public void append(String name, Declarator value) { + put(name, value); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java b/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java new file mode 100644 index 0000000..5a6f4b4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java @@ -0,0 +1,23 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +public class SyntaxError extends CompileError { + public SyntaxError(Lex lexer) { + super("syntax error near \"" + lexer.getTextAround() + "\"", lexer); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java b/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java new file mode 100644 index 0000000..58538a6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java @@ -0,0 +1,125 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +public interface TokenId { + int ABSTRACT = 300; + int BOOLEAN = 301; + int BREAK = 302; + int BYTE = 303; + int CASE = 304; + int CATCH = 305; + int CHAR = 306; + int CLASS = 307; + int CONST = 308; // reserved keyword + int CONTINUE = 309; + int DEFAULT = 310; + int DO = 311; + int DOUBLE = 312; + int ELSE = 313; + int EXTENDS = 314; + int FINAL = 315; + int FINALLY = 316; + int FLOAT = 317; + int FOR = 318; + int GOTO = 319; // reserved keyword + int IF = 320; + int IMPLEMENTS = 321; + int IMPORT = 322; + int INSTANCEOF = 323; + int INT = 324; + int INTERFACE = 325; + int LONG = 326; + int NATIVE = 327; + int NEW = 328; + int PACKAGE = 329; + int PRIVATE = 330; + int PROTECTED = 331; + int PUBLIC = 332; + int RETURN = 333; + int SHORT = 334; + int STATIC = 335; + int SUPER = 336; + int SWITCH = 337; + int SYNCHRONIZED = 338; + int THIS = 339; + int THROW = 340; + int THROWS = 341; + int TRANSIENT = 342; + int TRY = 343; + int VOID = 344; + int VOLATILE = 345; + int WHILE = 346; + int STRICT = 347; + + int NEQ = 350; // != + int MOD_E = 351; // %= + int AND_E = 352; // &= + int MUL_E = 353; // *= + int PLUS_E = 354; // += + int MINUS_E = 355; // -= + int DIV_E = 356; // /= + int LE = 357; // <= + int EQ = 358; // == + int GE = 359; // >= + int EXOR_E = 360; // ^= + int OR_E = 361; // |= + int PLUSPLUS = 362; // ++ + int MINUSMINUS = 363; // -- + int LSHIFT = 364; // << + int LSHIFT_E = 365; // <<= + int RSHIFT = 366; // >> + int RSHIFT_E = 367; // >>= + int OROR = 368; // || + int ANDAND = 369; // && + int ARSHIFT = 370; // >>> + int ARSHIFT_E = 371; // >>>= + + // operators from NEQ to ARSHIFT_E + String opNames[] = { "!=", "%=", "&=", "*=", "+=", "-=", "/=", + "<=", "==", ">=", "^=", "|=", "++", "--", + "<<", "<<=", ">>", ">>=", "||", "&&", ">>>", + ">>>=" }; + + // operators from MOD_E to ARSHIFT_E + int assignOps[] = { '%', '&', '*', '+', '-', '/', 0, 0, 0, + '^', '|', 0, 0, 0, LSHIFT, 0, RSHIFT, 0, 0, 0, + ARSHIFT }; + + int Identifier = 400; + int CharConstant = 401; + int IntConstant = 402; + int LongConstant = 403; + int FloatConstant = 404; + int DoubleConstant = 405; + int StringL = 406; + + int TRUE = 410; + int FALSE = 411; + int NULL = 412; + + int CALL = 'C'; // method call + int ARRAY = 'A'; // array access + int MEMBER = '#'; // static member access + + int EXPR = 'E'; // expression statement + int LABEL = 'L'; // label statement + int BLOCK = 'B'; // block statement + int DECL = 'D'; // declaration statement + + int BadToken = 500; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java b/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java new file mode 100644 index 0000000..80153d0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java @@ -0,0 +1,1044 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtField; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.compiler.ast.*; +import com.wenshuo.agent.javassist.bytecode.*; + +public class TypeChecker extends Visitor implements Opcode, TokenId { + static final String javaLangObject = "java.lang.Object"; + static final String jvmJavaLangObject = "java/lang/Object"; + static final String jvmJavaLangString = "java/lang/String"; + static final String jvmJavaLangClass = "java/lang/Class"; + + /* The following fields are used by atXXX() methods + * for returning the type of the compiled expression. + */ + protected int exprType; // VOID, NULL, CLASS, BOOLEAN, INT, ... + protected int arrayDim; + protected String className; // JVM-internal representation + + protected MemberResolver resolver; + protected CtClass thisClass; + protected MethodInfo thisMethod; + + public TypeChecker(CtClass cc, ClassPool cp) { + resolver = new MemberResolver(cp); + thisClass = cc; + thisMethod = null; + } + + /* + * Converts an array of tuples of exprType, arrayDim, and className + * into a String object. + */ + protected static String argTypesToString(int[] types, int[] dims, + String[] cnames) { + StringBuffer sbuf = new StringBuffer(); + sbuf.append('('); + int n = types.length; + if (n > 0) { + int i = 0; + while (true) { + typeToString(sbuf, types[i], dims[i], cnames[i]); + if (++i < n) + sbuf.append(','); + else + break; + } + } + + sbuf.append(')'); + return sbuf.toString(); + } + + /* + * Converts a tuple of exprType, arrayDim, and className + * into a String object. + */ + protected static StringBuffer typeToString(StringBuffer sbuf, + int type, int dim, String cname) { + String s; + if (type == CLASS) + s = MemberResolver.jvmToJavaName(cname); + else if (type == NULL) + s = "Object"; + else + try { + s = MemberResolver.getTypeName(type); + } + catch (CompileError e) { + s = "?"; + } + + sbuf.append(s); + while (dim-- > 0) + sbuf.append("[]"); + + return sbuf; + } + + /** + * Records the currently compiled method. + */ + public void setThisMethod(MethodInfo m) { + thisMethod = m; + } + + protected static void fatal() throws CompileError { + throw new CompileError("fatal"); + } + + /** + * Returns the JVM-internal representation of this class name. + */ + protected String getThisName() { + return MemberResolver.javaToJvmName(thisClass.getName()); + } + + /** + * Returns the JVM-internal representation of this super class name. + */ + protected String getSuperName() throws CompileError { + return MemberResolver.javaToJvmName( + MemberResolver.getSuperclass(thisClass).getName()); + } + + /* Converts a class name into a JVM-internal representation. + * + * It may also expand a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected String resolveClassName(ASTList name) throws CompileError { + return resolver.resolveClassName(name); + } + + /* Expands a simple class name to java.lang.*. + * For example, this converts Object into java/lang/Object. + */ + protected String resolveClassName(String jvmName) throws CompileError { + return resolver.resolveJvmClassName(jvmName); + } + + public void atNewExpr(NewExpr expr) throws CompileError { + if (expr.isArray()) + atNewArrayExpr(expr); + else { + CtClass clazz = resolver.lookupClassByName(expr.getClassName()); + String cname = clazz.getName(); + ASTList args = expr.getArguments(); + atMethodCallCore(clazz, MethodInfo.nameInit, args); + exprType = CLASS; + arrayDim = 0; + className = MemberResolver.javaToJvmName(cname); + } + } + + public void atNewArrayExpr(NewExpr expr) throws CompileError { + int type = expr.getArrayType(); + ASTList size = expr.getArraySize(); + ASTList classname = expr.getClassName(); + ASTree init = expr.getInitializer(); + if (init != null) + init.accept(this); + + if (size.length() > 1) + atMultiNewArray(type, classname, size); + else { + ASTree sizeExpr = size.head(); + if (sizeExpr != null) + sizeExpr.accept(this); + + exprType = type; + arrayDim = 1; + if (type == CLASS) + className = resolveClassName(classname); + else + className = null; + } + } + + public void atArrayInit(ArrayInit init) throws CompileError { + ASTList list = init; + while (list != null) { + ASTree h = list.head(); + list = list.tail(); + if (h != null) + h.accept(this); + } + } + + protected void atMultiNewArray(int type, ASTList classname, ASTList size) + throws CompileError + { + int count, dim; + dim = size.length(); + for (count = 0; size != null; size = size.tail()) { + ASTree s = size.head(); + if (s == null) + break; // int[][][] a = new int[3][4][]; + + ++count; + s.accept(this); + } + + exprType = type; + arrayDim = dim; + if (type == CLASS) + className = resolveClassName(classname); + else + className = null; + } + + public void atAssignExpr(AssignExpr expr) throws CompileError { + // =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, >>>= + int op = expr.getOperator(); + ASTree left = expr.oprand1(); + ASTree right = expr.oprand2(); + if (left instanceof Variable) + atVariableAssign(expr, op, (Variable)left, + ((Variable)left).getDeclarator(), + right); + else { + if (left instanceof Expr) { + Expr e = (Expr)left; + if (e.getOperator() == ARRAY) { + atArrayAssign(expr, op, (Expr)left, right); + return; + } + } + + atFieldAssign(expr, op, left, right); + } + } + + /* op is either =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, or >>>=. + * + * expr and var can be null. + */ + private void atVariableAssign(Expr expr, int op, Variable var, + Declarator d, ASTree right) + throws CompileError + { + int varType = d.getType(); + int varArray = d.getArrayDim(); + String varClass = d.getClassName(); + + if (op != '=') + atVariable(var); + + right.accept(this); + exprType = varType; + arrayDim = varArray; + className = varClass; + } + + private void atArrayAssign(Expr expr, int op, Expr array, + ASTree right) throws CompileError + { + atArrayRead(array.oprand1(), array.oprand2()); + int aType = exprType; + int aDim = arrayDim; + String cname = className; + right.accept(this); + exprType = aType; + arrayDim = aDim; + className = cname; + } + + protected void atFieldAssign(Expr expr, int op, ASTree left, ASTree right) + throws CompileError + { + CtField f = fieldAccess(left); + atFieldRead(f); + int fType = exprType; + int fDim = arrayDim; + String cname = className; + right.accept(this); + exprType = fType; + arrayDim = fDim; + className = cname; + } + + public void atCondExpr(CondExpr expr) throws CompileError { + booleanExpr(expr.condExpr()); + expr.thenExpr().accept(this); + int type1 = exprType; + int dim1 = arrayDim; + String cname1 = className; + expr.elseExpr().accept(this); + + if (dim1 == 0 && dim1 == arrayDim) + if (CodeGen.rightIsStrong(type1, exprType)) + expr.setThen(new CastExpr(exprType, 0, expr.thenExpr())); + else if (CodeGen.rightIsStrong(exprType, type1)) { + expr.setElse(new CastExpr(type1, 0, expr.elseExpr())); + exprType = type1; + } + } + + /* + * If atBinExpr() substitutes a new expression for the original + * binary-operator expression, it changes the operator name to '+' + * (if the original is not '+') and sets the new expression to the + * left-hand-side expression and null to the right-hand-side expression. + */ + public void atBinExpr(BinExpr expr) throws CompileError { + int token = expr.getOperator(); + int k = CodeGen.lookupBinOp(token); + if (k >= 0) { + /* arithmetic operators: +, -, *, /, %, |, ^, &, <<, >>, >>> + */ + if (token == '+') { + Expr e = atPlusExpr(expr); + if (e != null) { + /* String concatenation has been translated into + * an expression using StringBuffer. + */ + e = CallExpr.makeCall(Expr.make('.', e, + new Member("toString")), null); + expr.setOprand1(e); + expr.setOprand2(null); // <---- look at this! + className = jvmJavaLangString; + } + } + else { + ASTree left = expr.oprand1(); + ASTree right = expr.oprand2(); + left.accept(this); + int type1 = exprType; + right.accept(this); + if (!isConstant(expr, token, left, right)) + computeBinExprType(expr, token, type1); + } + } + else { + /* equation: &&, ||, ==, !=, <=, >=, <, > + */ + booleanExpr(expr); + } + } + + /* EXPR must be a + expression. + * atPlusExpr() returns non-null if the given expression is string + * concatenation. The returned value is "new StringBuffer().append..". + */ + private Expr atPlusExpr(BinExpr expr) throws CompileError { + ASTree left = expr.oprand1(); + ASTree right = expr.oprand2(); + if (right == null) { + // this expression has been already type-checked. + // see atBinExpr() above. + left.accept(this); + return null; + } + + if (isPlusExpr(left)) { + Expr newExpr = atPlusExpr((BinExpr)left); + if (newExpr != null) { + right.accept(this); + exprType = CLASS; + arrayDim = 0; + className = "java/lang/StringBuffer"; + return makeAppendCall(newExpr, right); + } + } + else + left.accept(this); + + int type1 = exprType; + int dim1 = arrayDim; + String cname = className; + right.accept(this); + + if (isConstant(expr, '+', left, right)) + return null; + + if ((type1 == CLASS && dim1 == 0 && jvmJavaLangString.equals(cname)) + || (exprType == CLASS && arrayDim == 0 + && jvmJavaLangString.equals(className))) { + ASTList sbufClass = ASTList.make(new Symbol("java"), + new Symbol("lang"), new Symbol("StringBuffer")); + ASTree e = new NewExpr(sbufClass, null); + exprType = CLASS; + arrayDim = 0; + className = "java/lang/StringBuffer"; + return makeAppendCall(makeAppendCall(e, left), right); + } + else { + computeBinExprType(expr, '+', type1); + return null; + } + } + + private boolean isConstant(BinExpr expr, int op, ASTree left, + ASTree right) throws CompileError + { + left = stripPlusExpr(left); + right = stripPlusExpr(right); + ASTree newExpr = null; + if (left instanceof StringL && right instanceof StringL && op == '+') + newExpr = new StringL(((StringL)left).get() + + ((StringL)right).get()); + else if (left instanceof IntConst) + newExpr = ((IntConst)left).compute(op, right); + else if (left instanceof DoubleConst) + newExpr = ((DoubleConst)left).compute(op, right); + + if (newExpr == null) + return false; // not a constant expression + else { + expr.setOperator('+'); + expr.setOprand1(newExpr); + expr.setOprand2(null); + newExpr.accept(this); // for setting exprType, arrayDim, ... + return true; + } + } + + /* CodeGen.atSwitchStmnt() also calls stripPlusExpr(). + */ + static ASTree stripPlusExpr(ASTree expr) { + if (expr instanceof BinExpr) { + BinExpr e = (BinExpr)expr; + if (e.getOperator() == '+' && e.oprand2() == null) + return e.getLeft(); + } + else if (expr instanceof Expr) { // note: BinExpr extends Expr. + Expr e = (Expr)expr; + int op = e.getOperator(); + if (op == MEMBER) { + ASTree cexpr = getConstantFieldValue((Member)e.oprand2()); + if (cexpr != null) + return cexpr; + } + else if (op == '+' && e.getRight() == null) + return e.getLeft(); + } + else if (expr instanceof Member) { + ASTree cexpr = getConstantFieldValue((Member)expr); + if (cexpr != null) + return cexpr; + } + + return expr; + } + + /** + * If MEM is a static final field, this method returns a constant + * expression representing the value of that field. + */ + private static ASTree getConstantFieldValue(Member mem) { + return getConstantFieldValue(mem.getField()); + } + + public static ASTree getConstantFieldValue(CtField f) { + if (f == null) + return null; + + Object value = f.getConstantValue(); + if (value == null) + return null; + + if (value instanceof String) + return new StringL((String)value); + else if (value instanceof Double || value instanceof Float) { + int token = (value instanceof Double) + ? DoubleConstant : FloatConstant; + return new DoubleConst(((Number)value).doubleValue(), token); + } + else if (value instanceof Number) { + int token = (value instanceof Long) ? LongConstant : IntConstant; + return new IntConst(((Number)value).longValue(), token); + } + else if (value instanceof Boolean) + return new Keyword(((Boolean)value).booleanValue() + ? TokenId.TRUE : TokenId.FALSE); + else + return null; + } + + private static boolean isPlusExpr(ASTree expr) { + if (expr instanceof BinExpr) { + BinExpr bexpr = (BinExpr)expr; + int token = bexpr.getOperator(); + return token == '+'; + } + + return false; + } + + private static Expr makeAppendCall(ASTree target, ASTree arg) { + return CallExpr.makeCall(Expr.make('.', target, new Member("append")), + new ASTList(arg)); + } + + private void computeBinExprType(BinExpr expr, int token, int type1) + throws CompileError + { + // arrayDim should be 0. + int type2 = exprType; + if (token == LSHIFT || token == RSHIFT || token == ARSHIFT) + exprType = type1; + else + insertCast(expr, type1, type2); + + if (CodeGen.isP_INT(exprType)) + exprType = INT; // type1 may be BYTE, ... + } + + private void booleanExpr(ASTree expr) + throws CompileError + { + int op = CodeGen.getCompOperator(expr); + if (op == EQ) { // ==, !=, ... + BinExpr bexpr = (BinExpr)expr; + bexpr.oprand1().accept(this); + int type1 = exprType; + int dim1 = arrayDim; + bexpr.oprand2().accept(this); + if (dim1 == 0 && arrayDim == 0) + insertCast(bexpr, type1, exprType); + } + else if (op == '!') + ((Expr)expr).oprand1().accept(this); + else if (op == ANDAND || op == OROR) { + BinExpr bexpr = (BinExpr)expr; + bexpr.oprand1().accept(this); + bexpr.oprand2().accept(this); + } + else // others + expr.accept(this); + + exprType = BOOLEAN; + arrayDim = 0; + } + + private void insertCast(BinExpr expr, int type1, int type2) + throws CompileError + { + if (CodeGen.rightIsStrong(type1, type2)) + expr.setLeft(new CastExpr(type2, 0, expr.oprand1())); + else + exprType = type1; + } + + public void atCastExpr(CastExpr expr) throws CompileError { + String cname = resolveClassName(expr.getClassName()); + expr.getOprand().accept(this); + exprType = expr.getType(); + arrayDim = expr.getArrayDim(); + className = cname; + } + + public void atInstanceOfExpr(InstanceOfExpr expr) throws CompileError { + expr.getOprand().accept(this); + exprType = BOOLEAN; + arrayDim = 0; + } + + public void atExpr(Expr expr) throws CompileError { + // array access, member access, + // (unary) +, (unary) -, ++, --, !, ~ + + int token = expr.getOperator(); + ASTree oprand = expr.oprand1(); + if (token == '.') { + String member = ((Symbol)expr.oprand2()).get(); + if (member.equals("length")) + try { + atArrayLength(expr); + } + catch (NoFieldException nfe) { + // length might be a class or package name. + atFieldRead(expr); + } + else if (member.equals("class")) + atClassObject(expr); // .class + else + atFieldRead(expr); + } + else if (token == MEMBER) { // field read + String member = ((Symbol)expr.oprand2()).get(); + if (member.equals("class")) + atClassObject(expr); // .class + else + atFieldRead(expr); + } + else if (token == ARRAY) + atArrayRead(oprand, expr.oprand2()); + else if (token == PLUSPLUS || token == MINUSMINUS) + atPlusPlus(token, oprand, expr); + else if (token == '!') + booleanExpr(expr); + else if (token == CALL) // method call + fatal(); + else { + oprand.accept(this); + if (!isConstant(expr, token, oprand)) + if (token == '-' || token == '~') + if (CodeGen.isP_INT(exprType)) + exprType = INT; // type may be BYTE, ... + } + } + + private boolean isConstant(Expr expr, int op, ASTree oprand) { + oprand = stripPlusExpr(oprand); + if (oprand instanceof IntConst) { + IntConst c = (IntConst)oprand; + long v = c.get(); + if (op == '-') + v = -v; + else if (op == '~') + v = ~v; + else + return false; + + c.set(v); + } + else if (oprand instanceof DoubleConst) { + DoubleConst c = (DoubleConst)oprand; + if (op == '-') + c.set(-c.get()); + else + return false; + } + else + return false; + + expr.setOperator('+'); + return true; + } + + public void atCallExpr(CallExpr expr) throws CompileError { + String mname = null; + CtClass targetClass = null; + ASTree method = expr.oprand1(); + ASTList args = (ASTList)expr.oprand2(); + + if (method instanceof Member) { + mname = ((Member)method).get(); + targetClass = thisClass; + } + else if (method instanceof Keyword) { // constructor + mname = MethodInfo.nameInit; // + if (((Keyword)method).get() == SUPER) + targetClass = MemberResolver.getSuperclass(thisClass); + else + targetClass = thisClass; + } + else if (method instanceof Expr) { + Expr e = (Expr)method; + mname = ((Symbol)e.oprand2()).get(); + int op = e.getOperator(); + if (op == MEMBER) // static method + targetClass + = resolver.lookupClass(((Symbol)e.oprand1()).get(), + false); + else if (op == '.') { + ASTree target = e.oprand1(); + String classFollowedByDotSuper = isDotSuper(target); + if (classFollowedByDotSuper != null) + targetClass = MemberResolver.getSuperInterface(thisClass, + classFollowedByDotSuper); + else { + try { + target.accept(this); + } + catch (NoFieldException nfe) { + if (nfe.getExpr() != target) + throw nfe; + + // it should be a static method. + exprType = CLASS; + arrayDim = 0; + className = nfe.getField(); // JVM-internal + e.setOperator(MEMBER); + e.setOprand1(new Symbol(MemberResolver.jvmToJavaName( + className))); + } + + if (arrayDim > 0) + targetClass = resolver.lookupClass(javaLangObject, true); + else if (exprType == CLASS /* && arrayDim == 0 */) + targetClass = resolver.lookupClassByJvmName(className); + else + badMethod(); + } + } + else + badMethod(); + } + else + fatal(); + + MemberResolver.Method minfo + = atMethodCallCore(targetClass, mname, args); + expr.setMethod(minfo); + } + + private static void badMethod() throws CompileError { + throw new CompileError("bad method"); + } + + /** + * Returns non-null if target is something like Foo.super + * for accessing the default method in an interface. + * Otherwise, null. + * + * @return the class name followed by {@code .super} or null. + */ + static String isDotSuper(ASTree target) { + if (target instanceof Expr) { + Expr e = (Expr)target; + if (e.getOperator() == '.') { + ASTree right = e.oprand2(); + if (right instanceof Keyword && ((Keyword)right).get() == SUPER) + return ((Symbol)e.oprand1()).get(); + } + } + + return null; + } + + /** + * @return a pair of the class declaring the invoked method + * and the MethodInfo of that method. Never null. + */ + public MemberResolver.Method atMethodCallCore(CtClass targetClass, + String mname, ASTList args) + throws CompileError + { + int nargs = getMethodArgsLength(args); + int[] types = new int[nargs]; + int[] dims = new int[nargs]; + String[] cnames = new String[nargs]; + atMethodArgs(args, types, dims, cnames); + + MemberResolver.Method found + = resolver.lookupMethod(targetClass, thisClass, thisMethod, + mname, types, dims, cnames); + if (found == null) { + String clazz = targetClass.getName(); + String signature = argTypesToString(types, dims, cnames); + String msg; + if (mname.equals(MethodInfo.nameInit)) + msg = "cannot find constructor " + clazz + signature; + else + msg = mname + signature + " not found in " + clazz; + + throw new CompileError(msg); + } + + String desc = found.info.getDescriptor(); + setReturnType(desc); + return found; + } + + public int getMethodArgsLength(ASTList args) { + return ASTList.length(args); + } + + public void atMethodArgs(ASTList args, int[] types, int[] dims, + String[] cnames) throws CompileError { + int i = 0; + while (args != null) { + ASTree a = args.head(); + a.accept(this); + types[i] = exprType; + dims[i] = arrayDim; + cnames[i] = className; + ++i; + args = args.tail(); + } + } + + void setReturnType(String desc) throws CompileError { + int i = desc.indexOf(')'); + if (i < 0) + badMethod(); + + char c = desc.charAt(++i); + int dim = 0; + while (c == '[') { + ++dim; + c = desc.charAt(++i); + } + + arrayDim = dim; + if (c == 'L') { + int j = desc.indexOf(';', i + 1); + if (j < 0) + badMethod(); + + exprType = CLASS; + className = desc.substring(i + 1, j); + } + else { + exprType = MemberResolver.descToType(c); + className = null; + } + } + + private void atFieldRead(ASTree expr) throws CompileError { + atFieldRead(fieldAccess(expr)); + } + + private void atFieldRead(CtField f) throws CompileError { + FieldInfo finfo = f.getFieldInfo2(); + String type = finfo.getDescriptor(); + + int i = 0; + int dim = 0; + char c = type.charAt(i); + while (c == '[') { + ++dim; + c = type.charAt(++i); + } + + arrayDim = dim; + exprType = MemberResolver.descToType(c); + + if (c == 'L') + className = type.substring(i + 1, type.indexOf(';', i + 1)); + else + className = null; + } + + /* if EXPR is to access a static field, fieldAccess() translates EXPR + * into an expression using '#' (MEMBER). For example, it translates + * java.lang.Integer.TYPE into java.lang.Integer#TYPE. This translation + * speeds up type resolution by MemberCodeGen. + */ + protected CtField fieldAccess(ASTree expr) throws CompileError { + if (expr instanceof Member) { + Member mem = (Member)expr; + String name = mem.get(); + try { + CtField f = thisClass.getField(name); + if (Modifier.isStatic(f.getModifiers())) + mem.setField(f); + + return f; + } + catch (NotFoundException e) { + // EXPR might be part of a static member access? + throw new NoFieldException(name, expr); + } + } + else if (expr instanceof Expr) { + Expr e = (Expr)expr; + int op = e.getOperator(); + if (op == MEMBER) { + Member mem = (Member)e.oprand2(); + CtField f + = resolver.lookupField(((Symbol)e.oprand1()).get(), mem); + mem.setField(f); + return f; + } + else if (op == '.') { + try { + e.oprand1().accept(this); + } + catch (NoFieldException nfe) { + if (nfe.getExpr() != e.oprand1()) + throw nfe; + + /* EXPR should be a static field. + * If EXPR might be part of a qualified class name, + * lookupFieldByJvmName2() throws NoFieldException. + */ + return fieldAccess2(e, nfe.getField()); + } + + CompileError err = null; + try { + if (exprType == CLASS && arrayDim == 0) + return resolver.lookupFieldByJvmName(className, + (Symbol)e.oprand2()); + } + catch (CompileError ce) { + err = ce; + } + + /* If a filed name is the same name as a package's, + * a static member of a class in that package is not + * visible. For example, + * + * class Foo { + * int javassist; + * } + * + * It is impossible to add the following method: + * + * String m() { return javassist.CtClass.intType.toString(); } + * + * because javassist is a field name. However, this is + * often inconvenient, this compiler allows it. The following + * code is for that. + */ + ASTree oprnd1 = e.oprand1(); + if (oprnd1 instanceof Symbol) + return fieldAccess2(e, ((Symbol)oprnd1).get()); + + if (err != null) + throw err; + } + } + + throw new CompileError("bad filed access"); + } + + private CtField fieldAccess2(Expr e, String jvmClassName) throws CompileError { + Member fname = (Member)e.oprand2(); + CtField f = resolver.lookupFieldByJvmName2(jvmClassName, fname, e); + e.setOperator(MEMBER); + e.setOprand1(new Symbol(MemberResolver.jvmToJavaName(jvmClassName))); + fname.setField(f); + return f; + } + + public void atClassObject(Expr expr) throws CompileError { + exprType = CLASS; + arrayDim = 0; + className =jvmJavaLangClass; + } + + public void atArrayLength(Expr expr) throws CompileError { + expr.oprand1().accept(this); + if (arrayDim == 0) + throw new NoFieldException("length", expr); + + exprType = INT; + arrayDim = 0; + } + + public void atArrayRead(ASTree array, ASTree index) + throws CompileError + { + array.accept(this); + int type = exprType; + int dim = arrayDim; + String cname = className; + index.accept(this); + exprType = type; + arrayDim = dim - 1; + className = cname; + } + + private void atPlusPlus(int token, ASTree oprand, Expr expr) + throws CompileError + { + boolean isPost = oprand == null; // ++i or i++? + if (isPost) + oprand = expr.oprand2(); + + if (oprand instanceof Variable) { + Declarator d = ((Variable)oprand).getDeclarator(); + exprType = d.getType(); + arrayDim = d.getArrayDim(); + } + else { + if (oprand instanceof Expr) { + Expr e = (Expr)oprand; + if (e.getOperator() == ARRAY) { + atArrayRead(e.oprand1(), e.oprand2()); + // arrayDim should be 0. + int t = exprType; + if (t == INT || t == BYTE || t == CHAR || t == SHORT) + exprType = INT; + + return; + } + } + + atFieldPlusPlus(oprand); + } + } + + protected void atFieldPlusPlus(ASTree oprand) throws CompileError + { + CtField f = fieldAccess(oprand); + atFieldRead(f); + int t = exprType; + if (t == INT || t == BYTE || t == CHAR || t == SHORT) + exprType = INT; + } + + public void atMember(Member mem) throws CompileError { + atFieldRead(mem); + } + + public void atVariable(Variable v) throws CompileError { + Declarator d = v.getDeclarator(); + exprType = d.getType(); + arrayDim = d.getArrayDim(); + className = d.getClassName(); + } + + public void atKeyword(Keyword k) throws CompileError { + arrayDim = 0; + int token = k.get(); + switch (token) { + case TRUE : + case FALSE : + exprType = BOOLEAN; + break; + case NULL : + exprType = NULL; + break; + case THIS : + case SUPER : + exprType = CLASS; + if (token == THIS) + className = getThisName(); + else + className = getSuperName(); + break; + default : + fatal(); + } + } + + public void atStringL(StringL s) throws CompileError { + exprType = CLASS; + arrayDim = 0; + className = jvmJavaLangString; + } + + public void atIntConst(IntConst i) throws CompileError { + arrayDim = 0; + int type = i.getType(); + if (type == IntConstant || type == CharConstant) + exprType = (type == IntConstant ? INT : CHAR); + else + exprType = LONG; + } + + public void atDoubleConst(DoubleConst d) throws CompileError { + arrayDim = 0; + if (d.getType() == DoubleConstant) + exprType = DOUBLE; + else + exprType = FLOAT; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java new file mode 100644 index 0000000..9c6966d --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java @@ -0,0 +1,160 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * A linked list. + * The right subtree must be an ASTList object or null. + */ +public class ASTList extends ASTree { + private ASTree left; + private ASTList right; + + public ASTList(ASTree _head, ASTList _tail) { + left = _head; + right = _tail; + } + + public ASTList(ASTree _head) { + left = _head; + right = null; + } + + public static ASTList make(ASTree e1, ASTree e2, ASTree e3) { + return new ASTList(e1, new ASTList(e2, new ASTList(e3))); + } + + public ASTree getLeft() { return left; } + + public ASTree getRight() { return right; } + + public void setLeft(ASTree _left) { left = _left; } + + public void setRight(ASTree _right) { + right = (ASTList)_right; + } + + /** + * Returns the car part of the list. + */ + public ASTree head() { return left; } + + public void setHead(ASTree _head) { + left = _head; + } + + /** + * Returns the cdr part of the list. + */ + public ASTList tail() { return right; } + + public void setTail(ASTList _tail) { + right = _tail; + } + + public void accept(Visitor v) throws CompileError { v.atASTList(this); } + + public String toString() { + StringBuffer sbuf = new StringBuffer(); + sbuf.append("(<"); + sbuf.append(getTag()); + sbuf.append('>'); + ASTList list = this; + while (list != null) { + sbuf.append(' '); + ASTree a = list.left; + sbuf.append(a == null ? "" : a.toString()); + list = list.right; + } + + sbuf.append(')'); + return sbuf.toString(); + } + + /** + * Returns the number of the elements in this list. + */ + public int length() { + return length(this); + } + + public static int length(ASTList list) { + if (list == null) + return 0; + + int n = 0; + while (list != null) { + list = list.right; + ++n; + } + + return n; + } + + /** + * Returns a sub list of the list. The sub list begins with the + * n-th element of the list. + * + * @param nth zero or more than zero. + */ + public ASTList sublist(int nth) { + ASTList list = this; + while (nth-- > 0) + list = list.right; + + return list; + } + + /** + * Substitutes newObj for oldObj in the + * list. + */ + public boolean subst(ASTree newObj, ASTree oldObj) { + for (ASTList list = this; list != null; list = list.right) + if (list.left == oldObj) { + list.left = newObj; + return true; + } + + return false; + } + + /** + * Appends an object to a list. + */ + public static ASTList append(ASTList a, ASTree b) { + return concat(a, new ASTList(b)); + } + + /** + * Concatenates two lists. + */ + public static ASTList concat(ASTList a, ASTList b) { + if (a == null) + return b; + else { + ASTList list = a; + while (list.right != null) + list = list.right; + + list.right = b; + return a; + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java new file mode 100644 index 0000000..b464ec0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java @@ -0,0 +1,59 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import java.io.Serializable; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Abstract Syntax Tree. An ASTree object represents a node of + * a binary tree. If the node is a leaf node, both getLeft() + * and getRight() returns null. + */ +public abstract class ASTree implements Serializable { + public ASTree getLeft() { return null; } + + public ASTree getRight() { return null; } + + public void setLeft(ASTree _left) {} + + public void setRight(ASTree _right) {} + + /** + * Is a method for the visitor pattern. It calls + * atXXX() on the given visitor, where + * XXX is the class name of the node object. + */ + public abstract void accept(Visitor v) throws CompileError; + + public String toString() { + StringBuffer sbuf = new StringBuffer(); + sbuf.append('<'); + sbuf.append(getTag()); + sbuf.append('>'); + return sbuf.toString(); + } + + /** + * Returns the type of this node. This method is used by + * toString(). + */ + protected String getTag() { + String name = getClass().getName(); + return name.substring(name.lastIndexOf('.') + 1); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java new file mode 100644 index 0000000..aff9430 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java @@ -0,0 +1,32 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Array initializer such as { 1, 2, 3 }. + */ +public class ArrayInit extends ASTList { + public ArrayInit(ASTree firstElement) { + super(firstElement); + } + + public void accept(Visitor v) throws CompileError { v.atArrayInit(this); } + + public String getTag() { return "array"; } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java new file mode 100644 index 0000000..5e49831 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java @@ -0,0 +1,41 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Assignment expression. + */ +public class AssignExpr extends Expr { + /* operator must be either of: + * =, %=, &=, *=, +=, -=, /=, ^=, |=, <<=, >>=, >>>= + */ + + private AssignExpr(int op, ASTree _head, ASTList _tail) { + super(op, _head, _tail); + } + + public static AssignExpr makeAssign(int op, ASTree oprand1, + ASTree oprand2) { + return new AssignExpr(op, oprand1, new ASTList(oprand2)); + } + + public void accept(Visitor v) throws CompileError { + v.atAssignExpr(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java new file mode 100644 index 0000000..41005c1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java @@ -0,0 +1,42 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Binary expression. + * + *

If the operator is +, the right node might be null. + * See TypeChecker.atBinExpr(). + */ +public class BinExpr extends Expr { + /* operator must be either of: + * ||, &&, |, ^, &, ==, !=, <=, >=, <, >, + * <<, >>, >>>, +, -, *, /, % + */ + + private BinExpr(int op, ASTree _head, ASTList _tail) { + super(op, _head, _tail); + } + + public static BinExpr makeBin(int op, ASTree oprand1, ASTree oprand2) { + return new BinExpr(op, oprand1, new ASTList(oprand2)); + } + + public void accept(Visitor v) throws CompileError { v.atBinExpr(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java new file mode 100644 index 0000000..f2b1fb1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java @@ -0,0 +1,47 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.MemberResolver; + +/** + * Method call expression. + */ +public class CallExpr extends Expr { + private MemberResolver.Method method; // cached result of lookupMethod() + + private CallExpr(ASTree _head, ASTList _tail) { + super(TokenId.CALL, _head, _tail); + method = null; + } + + public void setMethod(MemberResolver.Method m) { + method = m; + } + + public MemberResolver.Method getMethod() { + return method; + } + + public static CallExpr makeCall(ASTree target, ASTree args) { + return new CallExpr(target, new ASTList(args)); + } + + public void accept(Visitor v) throws CompileError { v.atCallExpr(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java new file mode 100644 index 0000000..60f7b43 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java @@ -0,0 +1,56 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Cast expression. + */ +public class CastExpr extends ASTList implements TokenId { + protected int castType; + protected int arrayDim; + + public CastExpr(ASTList className, int dim, ASTree expr) { + super(className, new ASTList(expr)); + castType = CLASS; + arrayDim = dim; + } + + public CastExpr(int type, int dim, ASTree expr) { + super(null, new ASTList(expr)); + castType = type; + arrayDim = dim; + } + + /* Returns CLASS, BOOLEAN, INT, or ... + */ + public int getType() { return castType; } + + public int getArrayDim() { return arrayDim; } + + public ASTList getClassName() { return (ASTList)getLeft(); } + + public ASTree getOprand() { return getRight().getLeft(); } + + public void setOprand(ASTree t) { getRight().setLeft(t); } + + public String getTag() { return "cast:" + castType + ":" + arrayDim; } + + public void accept(Visitor v) throws CompileError { v.atCastExpr(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java new file mode 100644 index 0000000..f11690f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java @@ -0,0 +1,44 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Conditional expression. + */ +public class CondExpr extends ASTList { + public CondExpr(ASTree cond, ASTree thenp, ASTree elsep) { + super(cond, new ASTList(thenp, new ASTList(elsep))); + } + + public ASTree condExpr() { return head(); } + + public void setCond(ASTree t) { setHead(t); } + + public ASTree thenExpr() { return tail().head(); } + + public void setThen(ASTree t) { tail().setHead(t); } + + public ASTree elseExpr() { return tail().tail().head(); } + + public void setElse(ASTree t) { tail().tail().setHead(t); } + + public String getTag() { return "?:"; } + + public void accept(Visitor v) throws CompileError { v.atCondExpr(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java new file mode 100644 index 0000000..be7c1cd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java @@ -0,0 +1,128 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Variable declarator. + */ +public class Declarator extends ASTList implements TokenId { + protected int varType; + protected int arrayDim; + protected int localVar; + protected String qualifiedClass; // JVM-internal representation + + public Declarator(int type, int dim) { + super(null); + varType = type; + arrayDim = dim; + localVar = -1; + qualifiedClass = null; + } + + public Declarator(ASTList className, int dim) { + super(null); + varType = CLASS; + arrayDim = dim; + localVar = -1; + qualifiedClass = astToClassName(className, '/'); + } + + /* For declaring a pre-defined? local variable. + */ + public Declarator(int type, String jvmClassName, int dim, + int var, Symbol sym) { + super(null); + varType = type; + arrayDim = dim; + localVar = var; + qualifiedClass = jvmClassName; + setLeft(sym); + append(this, null); // initializer + } + + public Declarator make(Symbol sym, int dim, ASTree init) { + Declarator d = new Declarator(this.varType, this.arrayDim + dim); + d.qualifiedClass = this.qualifiedClass; + d.setLeft(sym); + append(d, init); + return d; + } + + /* Returns CLASS, BOOLEAN, BYTE, CHAR, SHORT, INT, LONG, FLOAT, + * or DOUBLE (or VOID) + */ + public int getType() { return varType; } + + public int getArrayDim() { return arrayDim; } + + public void addArrayDim(int d) { arrayDim += d; } + + public String getClassName() { return qualifiedClass; } + + public void setClassName(String s) { qualifiedClass = s; } + + public Symbol getVariable() { return (Symbol)getLeft(); } + + public void setVariable(Symbol sym) { setLeft(sym); } + + public ASTree getInitializer() { + ASTList t = tail(); + if (t != null) + return t.head(); + else + return null; + } + + public void setLocalVar(int n) { localVar = n; } + + public int getLocalVar() { return localVar; } + + public String getTag() { return "decl"; } + + public void accept(Visitor v) throws CompileError { + v.atDeclarator(this); + } + + public static String astToClassName(ASTList name, char sep) { + if (name == null) + return null; + + StringBuffer sbuf = new StringBuffer(); + astToClassName(sbuf, name, sep); + return sbuf.toString(); + } + + private static void astToClassName(StringBuffer sbuf, ASTList name, + char sep) { + for (;;) { + ASTree h = name.head(); + if (h instanceof Symbol) + sbuf.append(((Symbol)h).get()); + else if (h instanceof ASTList) + astToClassName(sbuf, (ASTList)h, sep); + + name = name.tail(); + if (name == null) + break; + + sbuf.append(sep); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java new file mode 100644 index 0000000..777e3cf --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java @@ -0,0 +1,95 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.compiler.TokenId; + +/** + * Double constant. + */ +public class DoubleConst extends ASTree { + protected double value; + protected int type; + + public DoubleConst(double v, int tokenId) { value = v; type = tokenId; } + + public double get() { return value; } + + public void set(double v) { value = v; } + + /* Returns DoubleConstant or FloatConstant + */ + public int getType() { return type; } + + public String toString() { return Double.toString(value); } + + public void accept(Visitor v) throws CompileError { + v.atDoubleConst(this); + } + + public ASTree compute(int op, ASTree right) { + if (right instanceof IntConst) + return compute0(op, (IntConst)right); + else if (right instanceof DoubleConst) + return compute0(op, (DoubleConst)right); + else + return null; + } + + private DoubleConst compute0(int op, DoubleConst right) { + int newType; + if (this.type == TokenId.DoubleConstant + || right.type == TokenId.DoubleConstant) + newType = TokenId.DoubleConstant; + else + newType = TokenId.FloatConstant; + + return compute(op, this.value, right.value, newType); + } + + private DoubleConst compute0(int op, IntConst right) { + return compute(op, this.value, (double)right.value, this.type); + } + + private static DoubleConst compute(int op, double value1, double value2, + int newType) + { + double newValue; + switch (op) { + case '+' : + newValue = value1 + value2; + break; + case '-' : + newValue = value1 - value2; + break; + case '*' : + newValue = value1 * value2; + break; + case '/' : + newValue = value1 / value2; + break; + case '%' : + newValue = value1 % value2; + break; + default : + return null; + } + + return new DoubleConst(newValue, newType); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java new file mode 100644 index 0000000..d49ca3e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java @@ -0,0 +1,85 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Expression. + */ +public class Expr extends ASTList implements TokenId { + /* operator must be either of: + * (unary) +, (unary) -, ++, --, !, ~, + * ARRAY, . (dot), MEMBER (static member access). + * Otherwise, the object should be an instance of a subclass. + */ + + protected int operatorId; + + Expr(int op, ASTree _head, ASTList _tail) { + super(_head, _tail); + operatorId = op; + } + + Expr(int op, ASTree _head) { + super(_head); + operatorId = op; + } + + public static Expr make(int op, ASTree oprand1, ASTree oprand2) { + return new Expr(op, oprand1, new ASTList(oprand2)); + } + + public static Expr make(int op, ASTree oprand1) { + return new Expr(op, oprand1); + } + + public int getOperator() { return operatorId; } + + public void setOperator(int op) { operatorId = op; } + + public ASTree oprand1() { return getLeft(); } + + public void setOprand1(ASTree expr) { + setLeft(expr); + } + + public ASTree oprand2() { return getRight().getLeft(); } + + public void setOprand2(ASTree expr) { + getRight().setLeft(expr); + } + + public void accept(Visitor v) throws CompileError { v.atExpr(this); } + + public String getName() { + int id = operatorId; + if (id < 128) + return String.valueOf((char)id); + else if (NEQ <= id && id <= ARSHIFT_E) + return opNames[id - NEQ]; + else if (id == INSTANCEOF) + return "instanceof"; + else + return String.valueOf(id); + } + + protected String getTag() { + return "op:" + getName(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java new file mode 100644 index 0000000..968a97b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java @@ -0,0 +1,35 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +public class FieldDecl extends ASTList { + public FieldDecl(ASTree _head, ASTList _tail) { + super(_head, _tail); + } + + public ASTList getModifiers() { return (ASTList)getLeft(); } + + public Declarator getDeclarator() { return (Declarator)tail().head(); } + + public ASTree getInit() { return (ASTree)sublist(2).head(); } + + public void accept(Visitor v) throws CompileError { + v.atFieldDecl(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java new file mode 100644 index 0000000..e7fa6d3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java @@ -0,0 +1,40 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Instanceof expression. + */ +public class InstanceOfExpr extends CastExpr { + public InstanceOfExpr(ASTList className, int dim, ASTree expr) { + super(className, dim, expr); + } + + public InstanceOfExpr(int type, int dim, ASTree expr) { + super(type, dim, expr); + } + + public String getTag() { + return "instanceof:" + castType + ":" + arrayDim; + } + + public void accept(Visitor v) throws CompileError { + v.atInstanceOfExpr(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java new file mode 100644 index 0000000..b4d83ca --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java @@ -0,0 +1,139 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.compiler.TokenId; + +/** + * Integer constant. + */ +public class IntConst extends ASTree { + protected long value; + protected int type; + + public IntConst(long v, int tokenId) { value = v; type = tokenId; } + + public long get() { return value; } + + public void set(long v) { value = v; } + + /* Returns IntConstant, CharConstant, or LongConstant. + */ + public int getType() { return type; } + + public String toString() { return Long.toString(value); } + + public void accept(Visitor v) throws CompileError { + v.atIntConst(this); + } + + public ASTree compute(int op, ASTree right) { + if (right instanceof IntConst) + return compute0(op, (IntConst)right); + else if (right instanceof DoubleConst) + return compute0(op, (DoubleConst)right); + else + return null; + } + + private IntConst compute0(int op, IntConst right) { + int type1 = this.type; + int type2 = right.type; + int newType; + if (type1 == TokenId.LongConstant || type2 == TokenId.LongConstant) + newType = TokenId.LongConstant; + else if (type1 == TokenId.CharConstant + && type2 == TokenId.CharConstant) + newType = TokenId.CharConstant; + else + newType = TokenId.IntConstant; + + long value1 = this.value; + long value2 = right.value; + long newValue; + switch (op) { + case '+' : + newValue = value1 + value2; + break; + case '-' : + newValue = value1 - value2; + break; + case '*' : + newValue = value1 * value2; + break; + case '/' : + newValue = value1 / value2; + break; + case '%' : + newValue = value1 % value2; + break; + case '|' : + newValue = value1 | value2; + break; + case '^' : + newValue = value1 ^ value2; + break; + case '&' : + newValue = value1 & value2; + break; + case TokenId.LSHIFT : + newValue = value << (int)value2; + newType = type1; + break; + case TokenId.RSHIFT : + newValue = value >> (int)value2; + newType = type1; + break; + case TokenId.ARSHIFT : + newValue = value >>> (int)value2; + newType = type1; + break; + default : + return null; + } + + return new IntConst(newValue, newType); + } + + private DoubleConst compute0(int op, DoubleConst right) { + double value1 = (double)this.value; + double value2 = right.value; + double newValue; + switch (op) { + case '+' : + newValue = value1 + value2; + break; + case '-' : + newValue = value1 - value2; + break; + case '*' : + newValue = value1 * value2; + break; + case '/' : + newValue = value1 / value2; + break; + case '%' : + newValue = value1 % value2; + break; + default : + return null; + } + + return new DoubleConst(newValue, right.type); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java new file mode 100644 index 0000000..d1b63dd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java @@ -0,0 +1,36 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Keyword. + */ +public class Keyword extends ASTree { + protected int tokenId; + + public Keyword(int token) { + tokenId = token; + } + + public int get() { return tokenId; } + + public String toString() { return "id:" + tokenId; } + + public void accept(Visitor v) throws CompileError { v.atKeyword(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java new file mode 100644 index 0000000..cc5c4d1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java @@ -0,0 +1,40 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; +import com.wenshuo.agent.javassist.CtField; + +/** + * Member name. + */ +public class Member extends Symbol { + // cache maintained by fieldAccess() in TypeChecker. + // this is used to obtain the value of a static final field. + private CtField field; + + public Member(String name) { + super(name); + field = null; + } + + public void setField(CtField f) { field = f; } + + public CtField getField() { return field; } + + public void accept(Visitor v) throws CompileError { v.atMember(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java new file mode 100644 index 0000000..a80e374 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java @@ -0,0 +1,46 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +public class MethodDecl extends ASTList { + public static final String initName = ""; + + public MethodDecl(ASTree _head, ASTList _tail) { + super(_head, _tail); + } + + public boolean isConstructor() { + Symbol sym = getReturn().getVariable(); + return sym != null && initName.equals(sym.get()); + } + + public ASTList getModifiers() { return (ASTList)getLeft(); } + + public Declarator getReturn() { return (Declarator)tail().head(); } + + public ASTList getParams() { return (ASTList)sublist(2).head(); } + + public ASTList getThrows() { return (ASTList)sublist(3).head(); } + + public Stmnt getBody() { return (Stmnt)sublist(4).head(); } + + public void accept(Visitor v) throws CompileError { + v.atMethodDecl(this); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java new file mode 100644 index 0000000..4b064f2 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java @@ -0,0 +1,78 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * New Expression. + */ +public class NewExpr extends ASTList implements TokenId { + protected boolean newArray; + protected int arrayType; + + public NewExpr(ASTList className, ASTList args) { + super(className, new ASTList(args)); + newArray = false; + arrayType = CLASS; + } + + public NewExpr(int type, ASTList arraySize, ArrayInit init) { + super(null, new ASTList(arraySize)); + newArray = true; + arrayType = type; + if (init != null) + append(this, init); + } + + public static NewExpr makeObjectArray(ASTList className, + ASTList arraySize, ArrayInit init) { + NewExpr e = new NewExpr(className, arraySize); + e.newArray = true; + if (init != null) + append(e, init); + + return e; + } + + public boolean isArray() { return newArray; } + + /* TokenId.CLASS, TokenId.INT, ... + */ + public int getArrayType() { return arrayType; } + + public ASTList getClassName() { return (ASTList)getLeft(); } + + public ASTList getArguments() { return (ASTList)getRight().getLeft(); } + + public ASTList getArraySize() { return getArguments(); } + + public ArrayInit getInitializer() { + ASTree t = getRight().getRight(); + if (t == null) + return null; + else + return (ArrayInit)t.getLeft(); + } + + public void accept(Visitor v) throws CompileError { v.atNewExpr(this); } + + protected String getTag() { + return newArray ? "new[]" : "new"; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java new file mode 100644 index 0000000..56cb3e6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java @@ -0,0 +1,52 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * A node of a a binary tree. This class provides concrete methods + * overriding abstract methods in ASTree. + */ +public class Pair extends ASTree { + protected ASTree left, right; + + public Pair(ASTree _left, ASTree _right) { + left = _left; + right = _right; + } + + public void accept(Visitor v) throws CompileError { v.atPair(this); } + + public String toString() { + StringBuffer sbuf = new StringBuffer(); + sbuf.append("( "); + sbuf.append(left == null ? "" : left.toString()); + sbuf.append(" . "); + sbuf.append(right == null ? "" : right.toString()); + sbuf.append(')'); + return sbuf.toString(); + } + + public ASTree getLeft() { return left; } + + public ASTree getRight() { return right; } + + public void setLeft(ASTree _left) { left = _left; } + + public void setRight(ASTree _right) { right = _right; } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java new file mode 100644 index 0000000..0d81286 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java @@ -0,0 +1,60 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.TokenId; +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Statement. + */ +public class Stmnt extends ASTList implements TokenId { + protected int operatorId; + + public Stmnt(int op, ASTree _head, ASTList _tail) { + super(_head, _tail); + operatorId = op; + } + + public Stmnt(int op, ASTree _head) { + super(_head); + operatorId = op; + } + + public Stmnt(int op) { + this(op, null); + } + + public static Stmnt make(int op, ASTree oprand1, ASTree oprand2) { + return new Stmnt(op, oprand1, new ASTList(oprand2)); + } + + public static Stmnt make(int op, ASTree op1, ASTree op2, ASTree op3) { + return new Stmnt(op, op1, new ASTList(op2, new ASTList(op3))); + } + + public void accept(Visitor v) throws CompileError { v.atStmnt(this); } + + public int getOperator() { return operatorId; } + + protected String getTag() { + if (operatorId < 128) + return "stmnt:" + (char)operatorId; + else + return "stmnt:" + operatorId; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java new file mode 100644 index 0000000..d7c43c0 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java @@ -0,0 +1,36 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * String literal. + */ +public class StringL extends ASTree { + protected String text; + + public StringL(String t) { + text = t; + } + + public String get() { return text; } + + public String toString() { return "\"" + text + "\""; } + + public void accept(Visitor v) throws CompileError { v.atStringL(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java new file mode 100644 index 0000000..b305cbd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java @@ -0,0 +1,36 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Identifier. + */ +public class Symbol extends ASTree { + protected String identifier; + + public Symbol(String sym) { + identifier = sym; + } + + public String get() { return identifier; } + + public String toString() { return identifier; } + + public void accept(Visitor v) throws CompileError { v.atSymbol(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java new file mode 100644 index 0000000..0b7741a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java @@ -0,0 +1,39 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * Variable. + */ +public class Variable extends Symbol { + protected Declarator declarator; + + public Variable(String sym, Declarator d) { + super(sym); + declarator = d; + } + + public Declarator getDeclarator() { return declarator; } + + public String toString() { + return identifier + ":" + declarator.getType(); + } + + public void accept(Visitor v) throws CompileError { v.atVariable(this); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java new file mode 100644 index 0000000..e4c6e44 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java @@ -0,0 +1,52 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.compiler.ast; + +import com.wenshuo.agent.javassist.compiler.CompileError; + +/** + * The visitor pattern. + * + * @see ASTree#accept(Visitor) + */ +public class Visitor { + public void atASTList(ASTList n) throws CompileError {} + public void atPair(Pair n) throws CompileError {} + + public void atFieldDecl(FieldDecl n) throws CompileError {} + public void atMethodDecl(MethodDecl n) throws CompileError {} + public void atStmnt(Stmnt n) throws CompileError {} + public void atDeclarator(Declarator n) throws CompileError {} + + public void atAssignExpr(AssignExpr n) throws CompileError {} + public void atCondExpr(CondExpr n) throws CompileError {} + public void atBinExpr(BinExpr n) throws CompileError {} + public void atExpr(Expr n) throws CompileError {} + public void atCallExpr(CallExpr n) throws CompileError {} + public void atCastExpr(CastExpr n) throws CompileError {} + public void atInstanceOfExpr(InstanceOfExpr n) throws CompileError {} + public void atNewExpr(NewExpr n) throws CompileError {} + + public void atSymbol(Symbol n) throws CompileError {} + public void atMember(Member n) throws CompileError {} + public void atVariable(Variable n) throws CompileError {} + public void atKeyword(Keyword n) throws CompileError {} + public void atStringL(StringL n) throws CompileError {} + public void atIntConst(IntConst n) throws CompileError {} + public void atDoubleConst(DoubleConst n) throws CompileError {} + public void atArrayInit(ArrayInit n) throws CompileError {} +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java new file mode 100644 index 0000000..3942bd7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java @@ -0,0 +1,270 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.CodeConverter.ArrayAccessReplacementMethodNames; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.Descriptor; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.analysis.Analyzer; +import com.wenshuo.agent.javassist.bytecode.analysis.Frame; + +/** + * A transformer which replaces array access with static method invocations. + * + * @author Kabir Khan + * @author Jason T. Greene + * @version $Revision: 1.8 $ + */ +public final class TransformAccessArrayField extends Transformer { + private final String methodClassname; + private final ArrayAccessReplacementMethodNames names; + private Frame[] frames; + private int offset; + + public TransformAccessArrayField(Transformer next, String methodClassname, + ArrayAccessReplacementMethodNames names) throws NotFoundException { + super(next); + this.methodClassname = methodClassname; + this.names = names; + + } + + public void initialize(ConstPool cp, CtClass clazz, MethodInfo minfo) throws CannotCompileException { + /* + * This transformer must be isolated from other transformers, since some + * of them affect the local variable and stack maximums without updating + * the code attribute to reflect the changes. This screws up the + * data-flow analyzer, since it relies on consistent code state. Even + * if the attribute values were updated correctly, we would have to + * detect it, and redo analysis, which is not cheap. Instead, we are + * better off doing all changes in initialize() before everyone else has + * a chance to muck things up. + */ + CodeIterator iterator = minfo.getCodeAttribute().iterator(); + while (iterator.hasNext()) { + try { + int pos = iterator.next(); + int c = iterator.byteAt(pos); + + if (c == AALOAD) + initFrames(clazz, minfo); + + if (c == AALOAD || c == BALOAD || c == CALOAD || c == DALOAD + || c == FALOAD || c == IALOAD || c == LALOAD + || c == SALOAD) { + pos = replace(cp, iterator, pos, c, getLoadReplacementSignature(c)); + } else if (c == AASTORE || c == BASTORE || c == CASTORE + || c == DASTORE || c == FASTORE || c == IASTORE + || c == LASTORE || c == SASTORE) { + pos = replace(cp, iterator, pos, c, getStoreReplacementSignature(c)); + } + + } catch (Exception e) { + throw new CannotCompileException(e); + } + } + } + + public void clean() { + frames = null; + offset = -1; + } + + public int transform(CtClass tclazz, int pos, CodeIterator iterator, + ConstPool cp) throws BadBytecode { + // Do nothing, see above comment + return pos; + } + + private Frame getFrame(int pos) throws BadBytecode { + return frames[pos - offset]; // Adjust pos + } + + private void initFrames(CtClass clazz, MethodInfo minfo) throws BadBytecode { + if (frames == null) { + frames = ((new Analyzer())).analyze(clazz, minfo); + offset = 0; // start tracking changes + } + } + + private int updatePos(int pos, int increment) { + if (offset > -1) + offset += increment; + + return pos + increment; + } + + private String getTopType(int pos) throws BadBytecode { + Frame frame = getFrame(pos); + if (frame == null) + return null; + + CtClass clazz = frame.peek().getCtClass(); + return clazz != null ? Descriptor.toJvmName(clazz) : null; + } + + private int replace(ConstPool cp, CodeIterator iterator, int pos, + int opcode, String signature) throws BadBytecode { + String castType = null; + String methodName = getMethodName(opcode); + if (methodName != null) { + // See if the object must be cast + if (opcode == AALOAD) { + castType = getTopType(iterator.lookAhead()); + // Do not replace an AALOAD instruction that we do not have a type for + // This happens when the state is guaranteed to be null (Type.UNINIT) + // So we don't really care about this case. + if (castType == null) + return pos; + if ("java/lang/Object".equals(castType)) + castType = null; + } + + // The gap may include extra padding + // Write a nop in case the padding pushes the instruction forward + iterator.writeByte(NOP, pos); + CodeIterator.Gap gap + = iterator.insertGapAt(pos, castType != null ? 5 : 2, false); + pos = gap.position; + int mi = cp.addClassInfo(methodClassname); + int methodref = cp.addMethodrefInfo(mi, methodName, signature); + iterator.writeByte(INVOKESTATIC, pos); + iterator.write16bit(methodref, pos + 1); + + if (castType != null) { + int index = cp.addClassInfo(castType); + iterator.writeByte(CHECKCAST, pos + 3); + iterator.write16bit(index, pos + 4); + } + + pos = updatePos(pos, gap.length); + } + + return pos; + } + + private String getMethodName(int opcode) { + String methodName = null; + switch (opcode) { + case AALOAD: + methodName = names.objectRead(); + break; + case BALOAD: + methodName = names.byteOrBooleanRead(); + break; + case CALOAD: + methodName = names.charRead(); + break; + case DALOAD: + methodName = names.doubleRead(); + break; + case FALOAD: + methodName = names.floatRead(); + break; + case IALOAD: + methodName = names.intRead(); + break; + case SALOAD: + methodName = names.shortRead(); + break; + case LALOAD: + methodName = names.longRead(); + break; + case AASTORE: + methodName = names.objectWrite(); + break; + case BASTORE: + methodName = names.byteOrBooleanWrite(); + break; + case CASTORE: + methodName = names.charWrite(); + break; + case DASTORE: + methodName = names.doubleWrite(); + break; + case FASTORE: + methodName = names.floatWrite(); + break; + case IASTORE: + methodName = names.intWrite(); + break; + case SASTORE: + methodName = names.shortWrite(); + break; + case LASTORE: + methodName = names.longWrite(); + break; + } + + if (methodName.equals("")) + methodName = null; + + return methodName; + } + + private String getLoadReplacementSignature(int opcode) throws BadBytecode { + switch (opcode) { + case AALOAD: + return "(Ljava/lang/Object;I)Ljava/lang/Object;"; + case BALOAD: + return "(Ljava/lang/Object;I)B"; + case CALOAD: + return "(Ljava/lang/Object;I)C"; + case DALOAD: + return "(Ljava/lang/Object;I)D"; + case FALOAD: + return "(Ljava/lang/Object;I)F"; + case IALOAD: + return "(Ljava/lang/Object;I)I"; + case SALOAD: + return "(Ljava/lang/Object;I)S"; + case LALOAD: + return "(Ljava/lang/Object;I)J"; + } + + throw new BadBytecode(opcode); + } + + private String getStoreReplacementSignature(int opcode) throws BadBytecode { + switch (opcode) { + case AASTORE: + return "(Ljava/lang/Object;ILjava/lang/Object;)V"; + case BASTORE: + return "(Ljava/lang/Object;IB)V"; + case CASTORE: + return "(Ljava/lang/Object;IC)V"; + case DASTORE: + return "(Ljava/lang/Object;ID)V"; + case FASTORE: + return "(Ljava/lang/Object;IF)V"; + case IASTORE: + return "(Ljava/lang/Object;II)V"; + case SASTORE: + return "(Ljava/lang/Object;IS)V"; + case LASTORE: + return "(Ljava/lang/Object;IJ)V"; + } + + throw new BadBytecode(opcode); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java new file mode 100644 index 0000000..ebe8c61 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java @@ -0,0 +1,47 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.*; + +public class TransformAfter extends TransformBefore { + public TransformAfter(Transformer next, + CtMethod origMethod, CtMethod afterMethod) + throws NotFoundException + { + super(next, origMethod, afterMethod); + } + + protected int match2(int pos, CodeIterator iterator) throws BadBytecode { + iterator.move(pos); + iterator.insert(saveCode); + iterator.insert(loadCode); + int p = iterator.insertGap(3); + iterator.setMark(p); + iterator.insert(loadCode); + pos = iterator.next(); + p = iterator.getMark(); + iterator.writeByte(iterator.byteAt(pos), p); + iterator.write16bit(iterator.u16bitAt(pos + 1), p + 1); + iterator.writeByte(INVOKESTATIC, pos); + iterator.write16bit(newIndex, pos + 1); + iterator.move(p); + return iterator.next(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java new file mode 100644 index 0000000..ff75939 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java @@ -0,0 +1,108 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.*; + +public class TransformBefore extends TransformCall { + protected CtClass[] parameterTypes; + protected int locals; + protected int maxLocals; + protected byte[] saveCode, loadCode; + + public TransformBefore(Transformer next, + CtMethod origMethod, CtMethod beforeMethod) + throws NotFoundException + { + super(next, origMethod, beforeMethod); + + // override + methodDescriptor = origMethod.getMethodInfo2().getDescriptor(); + + parameterTypes = origMethod.getParameterTypes(); + locals = 0; + maxLocals = 0; + saveCode = loadCode = null; + } + + public void initialize(ConstPool cp, CodeAttribute attr) { + super.initialize(cp, attr); + locals = 0; + maxLocals = attr.getMaxLocals(); + saveCode = loadCode = null; + } + + protected int match(int c, int pos, CodeIterator iterator, + int typedesc, ConstPool cp) throws BadBytecode + { + if (newIndex == 0) { + String desc = Descriptor.ofParameters(parameterTypes) + 'V'; + desc = Descriptor.insertParameter(classname, desc); + int nt = cp.addNameAndTypeInfo(newMethodname, desc); + int ci = cp.addClassInfo(newClassname); + newIndex = cp.addMethodrefInfo(ci, nt); + constPool = cp; + } + + if (saveCode == null) + makeCode(parameterTypes, cp); + + return match2(pos, iterator); + } + + protected int match2(int pos, CodeIterator iterator) throws BadBytecode { + iterator.move(pos); + iterator.insert(saveCode); + iterator.insert(loadCode); + int p = iterator.insertGap(3); + iterator.writeByte(INVOKESTATIC, p); + iterator.write16bit(newIndex, p + 1); + iterator.insert(loadCode); + return iterator.next(); + } + + public int extraLocals() { return locals; } + + protected void makeCode(CtClass[] paramTypes, ConstPool cp) { + Bytecode save = new Bytecode(cp, 0, 0); + Bytecode load = new Bytecode(cp, 0, 0); + + int var = maxLocals; + int len = (paramTypes == null) ? 0 : paramTypes.length; + load.addAload(var); + makeCode2(save, load, 0, len, paramTypes, var + 1); + save.addAstore(var); + + saveCode = save.get(); + loadCode = load.get(); + } + + private void makeCode2(Bytecode save, Bytecode load, + int i, int n, CtClass[] paramTypes, int var) + { + if (i < n) { + int size = load.addLoad(var, paramTypes[i]); + makeCode2(save, load, i + 1, n, paramTypes, var + size); + save.addStore(var, paramTypes[i]); + } + else + locals = var - maxLocals; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java new file mode 100644 index 0000000..317bda3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java @@ -0,0 +1,130 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.*; + +public class TransformCall extends Transformer { + protected String classname, methodname, methodDescriptor; + protected String newClassname, newMethodname; + protected boolean newMethodIsPrivate; + + /* cache */ + protected int newIndex; + protected ConstPool constPool; + + public TransformCall(Transformer next, CtMethod origMethod, + CtMethod substMethod) + { + this(next, origMethod.getName(), substMethod); + classname = origMethod.getDeclaringClass().getName(); + } + + public TransformCall(Transformer next, String oldMethodName, + CtMethod substMethod) + { + super(next); + methodname = oldMethodName; + methodDescriptor = substMethod.getMethodInfo2().getDescriptor(); + classname = newClassname = substMethod.getDeclaringClass().getName(); + newMethodname = substMethod.getName(); + constPool = null; + newMethodIsPrivate = Modifier.isPrivate(substMethod.getModifiers()); + } + + public void initialize(ConstPool cp, CodeAttribute attr) { + if (constPool != cp) + newIndex = 0; + } + + /** + * Modify INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC and INVOKEVIRTUAL + * so that a different method is invoked. The class name in the operand + * of these instructions might be a subclass of the target class specified + * by classname. This method transforms the instruction + * in that case unless the subclass overrides the target method. + */ + public int transform(CtClass clazz, int pos, CodeIterator iterator, + ConstPool cp) throws BadBytecode + { + int c = iterator.byteAt(pos); + if (c == INVOKEINTERFACE || c == INVOKESPECIAL + || c == INVOKESTATIC || c == INVOKEVIRTUAL) { + int index = iterator.u16bitAt(pos + 1); + String cname = cp.eqMember(methodname, methodDescriptor, index); + if (cname != null && matchClass(cname, clazz.getClassPool())) { + int ntinfo = cp.getMemberNameAndType(index); + pos = match(c, pos, iterator, + cp.getNameAndTypeDescriptor(ntinfo), cp); + } + } + + return pos; + } + + private boolean matchClass(String name, ClassPool pool) { + if (classname.equals(name)) + return true; + + try { + CtClass clazz = pool.get(name); + CtClass declClazz = pool.get(classname); + if (clazz.subtypeOf(declClazz)) + try { + CtMethod m = clazz.getMethod(methodname, methodDescriptor); + return m.getDeclaringClass().getName().equals(classname); + } + catch (NotFoundException e) { + // maybe the original method has been removed. + return true; + } + } + catch (NotFoundException e) { + return false; + } + + return false; + } + + protected int match(int c, int pos, CodeIterator iterator, + int typedesc, ConstPool cp) throws BadBytecode + { + if (newIndex == 0) { + int nt = cp.addNameAndTypeInfo(cp.addUtf8Info(newMethodname), + typedesc); + int ci = cp.addClassInfo(newClassname); + if (c == INVOKEINTERFACE) + newIndex = cp.addInterfaceMethodrefInfo(ci, nt); + else { + if (newMethodIsPrivate && c == INVOKEVIRTUAL) + iterator.writeByte(INVOKESPECIAL, pos); + + newIndex = cp.addMethodrefInfo(ci, nt); + } + + constPool = cp; + } + + iterator.write16bit(newIndex, pos + 1); + return pos; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java new file mode 100644 index 0000000..08ed468 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java @@ -0,0 +1,82 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtField; +import com.wenshuo.agent.javassist.Modifier; + +final public class TransformFieldAccess extends Transformer { + private String newClassname, newFieldname; + private String fieldname; + private CtClass fieldClass; + private boolean isPrivate; + + /* cache */ + private int newIndex; + private ConstPool constPool; + + public TransformFieldAccess(Transformer next, CtField field, + String newClassname, String newFieldname) + { + super(next); + this.fieldClass = field.getDeclaringClass(); + this.fieldname = field.getName(); + this.isPrivate = Modifier.isPrivate(field.getModifiers()); + this.newClassname = newClassname; + this.newFieldname = newFieldname; + this.constPool = null; + } + + public void initialize(ConstPool cp, CodeAttribute attr) { + if (constPool != cp) + newIndex = 0; + } + + /** + * Modify GETFIELD, GETSTATIC, PUTFIELD, and PUTSTATIC so that + * a different field is accessed. The new field must be declared + * in a superclass of the class in which the original field is + * declared. + */ + public int transform(CtClass clazz, int pos, + CodeIterator iterator, ConstPool cp) + { + int c = iterator.byteAt(pos); + if (c == GETFIELD || c == GETSTATIC + || c == PUTFIELD || c == PUTSTATIC) { + int index = iterator.u16bitAt(pos + 1); + String typedesc + = TransformReadField.isField(clazz.getClassPool(), cp, + fieldClass, fieldname, isPrivate, index); + if (typedesc != null) { + if (newIndex == 0) { + int nt = cp.addNameAndTypeInfo(newFieldname, + typedesc); + newIndex = cp.addFieldrefInfo( + cp.addClassInfo(newClassname), nt); + constPool = cp; + } + + iterator.write16bit(newIndex, pos + 1); + } + } + + return pos; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java new file mode 100644 index 0000000..a85d750 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java @@ -0,0 +1,103 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CannotCompileException; + +final public class TransformNew extends Transformer { + private int nested; + private String classname, trapClass, trapMethod; + + public TransformNew(Transformer next, + String classname, String trapClass, String trapMethod) { + super(next); + this.classname = classname; + this.trapClass = trapClass; + this.trapMethod = trapMethod; + } + + public void initialize(ConstPool cp, CodeAttribute attr) { + nested = 0; + } + + /** + * Replace a sequence of + * NEW classname + * DUP + * ... + * INVOKESPECIAL + * with + * NOP + * NOP + * ... + * INVOKESTATIC trapMethod in trapClass + */ + public int transform(CtClass clazz, int pos, CodeIterator iterator, + ConstPool cp) throws CannotCompileException + { + int index; + int c = iterator.byteAt(pos); + if (c == NEW) { + index = iterator.u16bitAt(pos + 1); + if (cp.getClassInfo(index).equals(classname)) { + if (iterator.byteAt(pos + 3) != DUP) + throw new CannotCompileException( + "NEW followed by no DUP was found"); + + iterator.writeByte(NOP, pos); + iterator.writeByte(NOP, pos + 1); + iterator.writeByte(NOP, pos + 2); + iterator.writeByte(NOP, pos + 3); + ++nested; + + StackMapTable smt + = (StackMapTable)iterator.get().getAttribute(StackMapTable.tag); + if (smt != null) + smt.removeNew(pos); + + StackMap sm + = (StackMap)iterator.get().getAttribute(StackMap.tag); + if (sm != null) + sm.removeNew(pos); + } + } + else if (c == INVOKESPECIAL) { + index = iterator.u16bitAt(pos + 1); + int typedesc = cp.isConstructor(classname, index); + if (typedesc != 0 && nested > 0) { + int methodref = computeMethodref(typedesc, cp); + iterator.writeByte(INVOKESTATIC, pos); + iterator.write16bit(methodref, pos + 1); + --nested; + } + } + + return pos; + } + + private int computeMethodref(int typedesc, ConstPool cp) { + int classIndex = cp.addClassInfo(trapClass); + int mnameIndex = cp.addUtf8Info(trapMethod); + typedesc = cp.addUtf8Info( + Descriptor.changeReturnType(classname, + cp.getUtf8Info(typedesc))); + return cp.addMethodrefInfo(classIndex, + cp.addNameAndTypeInfo(mnameIndex, typedesc)); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java new file mode 100644 index 0000000..513b8ef --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java @@ -0,0 +1,83 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CannotCompileException; + +final public class TransformNewClass extends Transformer { + private int nested; + private String classname, newClassName; + private int newClassIndex, newMethodNTIndex, newMethodIndex; + + public TransformNewClass(Transformer next, + String classname, String newClassName) { + super(next); + this.classname = classname; + this.newClassName = newClassName; + } + + public void initialize(ConstPool cp, CodeAttribute attr) { + nested = 0; + newClassIndex = newMethodNTIndex = newMethodIndex = 0; + } + + /** + * Modifies a sequence of + * NEW classname + * DUP + * ... + * INVOKESPECIAL classname:method + */ + public int transform(CtClass clazz, int pos, CodeIterator iterator, + ConstPool cp) throws CannotCompileException + { + int index; + int c = iterator.byteAt(pos); + if (c == NEW) { + index = iterator.u16bitAt(pos + 1); + if (cp.getClassInfo(index).equals(classname)) { + if (iterator.byteAt(pos + 3) != DUP) + throw new CannotCompileException( + "NEW followed by no DUP was found"); + + if (newClassIndex == 0) + newClassIndex = cp.addClassInfo(newClassName); + + iterator.write16bit(newClassIndex, pos + 1); + ++nested; + } + } + else if (c == INVOKESPECIAL) { + index = iterator.u16bitAt(pos + 1); + int typedesc = cp.isConstructor(classname, index); + if (typedesc != 0 && nested > 0) { + int nt = cp.getMethodrefNameAndType(index); + if (newMethodNTIndex != nt) { + newMethodNTIndex = nt; + newMethodIndex = cp.addMethodrefInfo(newClassIndex, nt); + } + + iterator.write16bit(newMethodIndex, pos + 1); + --nested; + } + } + + return pos; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java new file mode 100644 index 0000000..d8477c8 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java @@ -0,0 +1,96 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtField; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.Modifier; + +public class TransformReadField extends Transformer { + protected String fieldname; + protected CtClass fieldClass; + protected boolean isPrivate; + protected String methodClassname, methodName; + + public TransformReadField(Transformer next, CtField field, + String methodClassname, String methodName) + { + super(next); + this.fieldClass = field.getDeclaringClass(); + this.fieldname = field.getName(); + this.methodClassname = methodClassname; + this.methodName = methodName; + this.isPrivate = Modifier.isPrivate(field.getModifiers()); + } + + static String isField(ClassPool pool, ConstPool cp, CtClass fclass, + String fname, boolean is_private, int index) { + if (!cp.getFieldrefName(index).equals(fname)) + return null; + + try { + CtClass c = pool.get(cp.getFieldrefClassName(index)); + if (c == fclass || (!is_private && isFieldInSuper(c, fclass, fname))) + return cp.getFieldrefType(index); + } + catch (NotFoundException e) {} + return null; + } + + static boolean isFieldInSuper(CtClass clazz, CtClass fclass, String fname) { + if (!clazz.subclassOf(fclass)) + return false; + + try { + CtField f = clazz.getField(fname); + return f.getDeclaringClass() == fclass; + } + catch (NotFoundException e) {} + return false; + } + + public int transform(CtClass tclazz, int pos, CodeIterator iterator, + ConstPool cp) throws BadBytecode + { + int c = iterator.byteAt(pos); + if (c == GETFIELD || c == GETSTATIC) { + int index = iterator.u16bitAt(pos + 1); + String typedesc = isField(tclazz.getClassPool(), cp, + fieldClass, fieldname, isPrivate, index); + if (typedesc != null) { + if (c == GETSTATIC) { + iterator.move(pos); + pos = iterator.insertGap(1); // insertGap() may insert 4 bytes. + iterator.writeByte(ACONST_NULL, pos); + pos = iterator.next(); + } + + String type = "(Ljava/lang/Object;)" + typedesc; + int mi = cp.addClassInfo(methodClassname); + int methodref = cp.addMethodrefInfo(mi, methodName, type); + iterator.writeByte(INVOKESTATIC, pos); + iterator.write16bit(methodref, pos + 1); + return pos; + } + } + + return pos; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java b/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java new file mode 100644 index 0000000..ecc3f38 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java @@ -0,0 +1,72 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtField; +import com.wenshuo.agent.javassist.bytecode.*; + +final public class TransformWriteField extends TransformReadField { + public TransformWriteField(Transformer next, CtField field, + String methodClassname, String methodName) + { + super(next, field, methodClassname, methodName); + } + + public int transform(CtClass tclazz, int pos, CodeIterator iterator, + ConstPool cp) throws BadBytecode + { + int c = iterator.byteAt(pos); + if (c == PUTFIELD || c == PUTSTATIC) { + int index = iterator.u16bitAt(pos + 1); + String typedesc = isField(tclazz.getClassPool(), cp, + fieldClass, fieldname, isPrivate, index); + if (typedesc != null) { + if (c == PUTSTATIC) { + CodeAttribute ca = iterator.get(); + iterator.move(pos); + char c0 = typedesc.charAt(0); + if (c0 == 'J' || c0 == 'D') { // long or double + // insertGap() may insert 4 bytes. + pos = iterator.insertGap(3); + iterator.writeByte(ACONST_NULL, pos); + iterator.writeByte(DUP_X2, pos + 1); + iterator.writeByte(POP, pos + 2); + ca.setMaxStack(ca.getMaxStack() + 2); + } + else { + // insertGap() may insert 4 bytes. + pos = iterator.insertGap(2); + iterator.writeByte(ACONST_NULL, pos); + iterator.writeByte(SWAP, pos + 1); + ca.setMaxStack(ca.getMaxStack() + 1); + } + + pos = iterator.next(); + } + + int mi = cp.addClassInfo(methodClassname); + String type = "(Ljava/lang/Object;" + typedesc + ")V"; + int methodref = cp.addMethodrefInfo(mi, methodName, type); + iterator.writeByte(INVOKESTATIC, pos); + iterator.write16bit(methodref, pos + 1); + } + } + + return pos; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java b/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java new file mode 100644 index 0000000..573dcf6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java @@ -0,0 +1,57 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.convert; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.Opcode; + +/** + * Transformer and its subclasses are used for executing + * code transformation specified by CodeConverter. + * + * @see javassist.CodeConverter + */ +public abstract class Transformer implements Opcode { + private Transformer next; + + public Transformer(Transformer t) { + next = t; + } + + public Transformer getNext() { return next; } + + public void initialize(ConstPool cp, CodeAttribute attr) {} + + public void initialize(ConstPool cp, CtClass clazz, MethodInfo minfo) throws CannotCompileException { + initialize(cp, minfo.getCodeAttribute()); + } + + public void clean() {} + + public abstract int transform(CtClass clazz, int pos, CodeIterator it, + ConstPool cp) throws CannotCompileException, BadBytecode; + + public int extraLocals() { return 0; } + + public int extraStack() { return 0; } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java b/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java new file mode 100644 index 0000000..2f47ebf --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java @@ -0,0 +1,166 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * Explicit type cast. + */ +public class Cast extends Expr { + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected Cast(int pos, CodeIterator i, CtClass declaring, MethodInfo m) { + super(pos, i, declaring, m); + } + + /** + * Returns the method or constructor containing the type cast + * expression represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * type-cast expression. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the type-cast expression. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the CtClass object representing + * the type specified by the cast. + */ + public CtClass getType() throws NotFoundException { + ConstPool cp = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + String name = cp.getClassInfo(index); + return thisClass.getClassPool().getCtClass(name); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Replaces the explicit cast operator with the bytecode derived from + * the given source text. + * + *

$0 is available but the value is null. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + thisClass.getClassFile(); // to call checkModify(). + ConstPool constPool = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + + Javac jc = new Javac(thisClass); + ClassPool cp = thisClass.getClassPool(); + CodeAttribute ca = iterator.get(); + + try { + CtClass[] params + = new CtClass[] { cp.get(javaLangObject) }; + CtClass retType = getType(); + + int paramVar = ca.getMaxLocals(); + jc.recordParams(javaLangObject, params, true, paramVar, + withinStatic()); + int retVar = jc.recordReturnType(retType, true); + jc.recordProceed(new ProceedForCast(index, retType)); + + /* Is $_ included in the source code? + */ + checkResultValue(retType, statement); + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, true, paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + bytecode.addConstZero(retType); + bytecode.addStore(retVar, retType); // initialize $_ + + jc.compileStmnt(statement); + bytecode.addLoad(retVar, retType); + + replace0(pos, bytecode, 3); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } + + /* $proceed(Object obj) + */ + static class ProceedForCast implements ProceedHandler { + int index; + CtClass retType; + + ProceedForCast(int i, CtClass t) { + index = i; + retType = t; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + if (gen.getMethodArgsLength(args) != 1) + throw new CompileError(Javac.proceedName + + "() cannot take more than one parameter " + + "for cast"); + + gen.atMethodArgs(args, new int[1], new int[1], new String[1]); + bytecode.addOpcode(Opcode.CHECKCAST); + bytecode.addIndex(index); + gen.setType(retType); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.atMethodArgs(args, new int[1], new int[1], new String[1]); + c.setType(retType); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java b/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java new file mode 100644 index 0000000..b99bddc --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java @@ -0,0 +1,70 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtConstructor; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; + +/** + * Constructor call such as this() and super() + * within a constructor body. + * + * @see NewExpr + */ +public class ConstructorCall extends MethodCall { + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected ConstructorCall(int pos, CodeIterator i, CtClass decl, MethodInfo m) { + super(pos, i, decl, m); + } + + /** + * Returns "super" or ""this". + */ + public String getMethodName() { + return isSuper() ? "super" : "this"; + } + + /** + * Always throws a NotFoundException. + * + * @see #getConstructor() + */ + public CtMethod getMethod() throws NotFoundException { + throw new NotFoundException("this is a constructor call. Call getConstructor()."); + } + + /** + * Returns the called constructor. + */ + public CtConstructor getConstructor() throws NotFoundException { + return getCtClass().getConstructor(getSignature()); + } + + /** + * Returns true if the called constructor is not this() + * but super() (a constructor declared in the super class). + */ + public boolean isSuper() { + return super.isSuper(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java b/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java new file mode 100644 index 0000000..6dd56b9 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java @@ -0,0 +1,330 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtBehavior; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtConstructor; +import com.wenshuo.agent.javassist.CtPrimitiveType; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.AccessFlag; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.Bytecode; +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.CodeAttribute; +import com.wenshuo.agent.javassist.bytecode.CodeIterator; +import com.wenshuo.agent.javassist.bytecode.ConstPool; +import com.wenshuo.agent.javassist.bytecode.ExceptionTable; +import com.wenshuo.agent.javassist.bytecode.ExceptionsAttribute; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; +import com.wenshuo.agent.javassist.bytecode.Opcode; +import com.wenshuo.agent.javassist.compiler.Javac; + +import java.util.Iterator; +import java.util.LinkedList; + +/** + * Expression. + */ +public abstract class Expr implements Opcode { + int currentPos; + CodeIterator iterator; + CtClass thisClass; + MethodInfo thisMethod; + boolean edited; + int maxLocals, maxStack; + + static final String javaLangObject = "java.lang.Object"; + + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected Expr(int pos, CodeIterator i, CtClass declaring, MethodInfo m) { + currentPos = pos; + iterator = i; + thisClass = declaring; + thisMethod = m; + } + + /** + * Returns the class that declares the method enclosing + * this expression. + * + * @since 3.7 + */ + public CtClass getEnclosingClass() { return thisClass; } + + protected final ConstPool getConstPool() { + return thisMethod.getConstPool(); + } + + protected final boolean edited() { + return edited; + } + + protected final int locals() { + return maxLocals; + } + + protected final int stack() { + return maxStack; + } + + /** + * Returns true if this method is static. + */ + protected final boolean withinStatic() { + return (thisMethod.getAccessFlags() & AccessFlag.STATIC) != 0; + } + + /** + * Returns the constructor or method containing the expression. + */ + public CtBehavior where() { + MethodInfo mi = thisMethod; + CtBehavior[] cb = thisClass.getDeclaredBehaviors(); + for (int i = cb.length - 1; i >= 0; --i) + if (cb[i].getMethodInfo2() == mi) + return cb[i]; + + CtConstructor init = thisClass.getClassInitializer(); + if (init != null && init.getMethodInfo2() == mi) + return init; + + /* getDeclaredBehaviors() returns a list of methods/constructors. + * Although the list is cached in a CtClass object, it might be + * recreated for some reason. Thus, the member name and the signature + * must be also checked. + */ + for (int i = cb.length - 1; i >= 0; --i) { + if (thisMethod.getName().equals(cb[i].getMethodInfo2().getName()) + && thisMethod.getDescriptor() + .equals(cb[i].getMethodInfo2().getDescriptor())) { + return cb[i]; + } + } + + throw new RuntimeException("fatal: not found"); + } + + /** + * Returns the list of exceptions that the expression may throw. This list + * includes both the exceptions that the try-catch statements including the + * expression can catch and the exceptions that the throws declaration + * allows the method to throw. + */ + public CtClass[] mayThrow() { + ClassPool pool = thisClass.getClassPool(); + ConstPool cp = thisMethod.getConstPool(); + LinkedList list = new LinkedList(); + try { + CodeAttribute ca = thisMethod.getCodeAttribute(); + ExceptionTable et = ca.getExceptionTable(); + int pos = currentPos; + int n = et.size(); + for (int i = 0; i < n; ++i) + if (et.startPc(i) <= pos && pos < et.endPc(i)) { + int t = et.catchType(i); + if (t > 0) + try { + addClass(list, pool.get(cp.getClassInfo(t))); + } + catch (NotFoundException e) { + } + } + } + catch (NullPointerException e) { + } + + ExceptionsAttribute ea = thisMethod.getExceptionsAttribute(); + if (ea != null) { + String[] exceptions = ea.getExceptions(); + if (exceptions != null) { + int n = exceptions.length; + for (int i = 0; i < n; ++i) + try { + addClass(list, pool.get(exceptions[i])); + } + catch (NotFoundException e) { + } + } + } + + return (CtClass[])list.toArray(new CtClass[list.size()]); + } + + private static void addClass(LinkedList list, CtClass c) { + Iterator it = list.iterator(); + while (it.hasNext()) + if (it.next() == c) + return; + + list.add(c); + } + + /** + * Returns the index of the bytecode corresponding to the expression. It is + * the index into the byte array containing the Java bytecode that + * implements the method. + */ + public int indexOfBytecode() { + return currentPos; + } + + /** + * Returns the line number of the source line containing the expression. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return thisMethod.getLineNumber(currentPos); + } + + /** + * Returns the source file containing the expression. + * + * @return null if this information is not available. + */ + public String getFileName() { + ClassFile cf = thisClass.getClassFile2(); + if (cf == null) + return null; + else + return cf.getSourceFile(); + } + + static final boolean checkResultValue(CtClass retType, String prog) + throws CannotCompileException { + /* + * Is $_ included in the source code? + */ + boolean hasIt = (prog.indexOf(Javac.resultVarName) >= 0); + if (!hasIt && retType != CtClass.voidType) + throw new CannotCompileException( + "the resulting value is not stored in " + + Javac.resultVarName); + + return hasIt; + } + + /* + * If isStaticCall is true, null is assigned to $0. So $0 must be declared + * by calling Javac.recordParams(). + * + * After executing this method, the current stack depth might be less than + * 0. + */ + static final void storeStack(CtClass[] params, boolean isStaticCall, + int regno, Bytecode bytecode) { + storeStack0(0, params.length, params, regno + 1, bytecode); + if (isStaticCall) + bytecode.addOpcode(ACONST_NULL); + + bytecode.addAstore(regno); + } + + private static void storeStack0(int i, int n, CtClass[] params, int regno, + Bytecode bytecode) { + if (i >= n) + return; + else { + CtClass c = params[i]; + int size; + if (c instanceof CtPrimitiveType) + size = ((CtPrimitiveType)c).getDataSize(); + else + size = 1; + + storeStack0(i + 1, n, params, regno + size, bytecode); + bytecode.addStore(regno, c); + } + } + + // The implementation of replace() should call thisClass.checkModify() + // so that isModify() will return true. Otherwise, thisClass.classfile + // might be released during compilation and the compiler might generate + // bytecode with a wrong copy of ConstPool. + + /** + * Replaces this expression with the bytecode derived from + * the given source text. + * + * @param statement a Java statement except try-catch. + */ + public abstract void replace(String statement) throws CannotCompileException; + + /** + * Replaces this expression with the bytecode derived from + * the given source text and ExprEditor. + * + * @param statement a Java statement except try-catch. + * @param recursive if not null, the substituted bytecode + * is recursively processed by the given + * ExprEditor. + * @since 3.1 + */ + public void replace(String statement, ExprEditor recursive) + throws CannotCompileException + { + replace(statement); + if (recursive != null) + runEditor(recursive, iterator); + } + + protected void replace0(int pos, Bytecode bytecode, int size) + throws BadBytecode { + byte[] code = bytecode.get(); + edited = true; + int gap = code.length - size; + for (int i = 0; i < size; ++i) + iterator.writeByte(NOP, pos + i); + + if (gap > 0) + pos = iterator.insertGapAt(pos, gap, false).position; + + iterator.write(code, pos); + iterator.insert(bytecode.getExceptionTable(), pos); + maxLocals = bytecode.getMaxLocals(); + maxStack = bytecode.getMaxStack(); + } + + protected void runEditor(ExprEditor ed, CodeIterator oldIterator) + throws CannotCompileException + { + CodeAttribute codeAttr = oldIterator.get(); + int orgLocals = codeAttr.getMaxLocals(); + int orgStack = codeAttr.getMaxStack(); + int newLocals = locals(); + codeAttr.setMaxStack(stack()); + codeAttr.setMaxLocals(newLocals); + ExprEditor.LoopContext context + = new ExprEditor.LoopContext(newLocals); + int size = oldIterator.getCodeLength(); + int endPos = oldIterator.lookAhead(); + oldIterator.move(currentPos); + if (ed.doit(thisClass, thisMethod, context, oldIterator, endPos)) + edited = true; + + oldIterator.move(endPos + oldIterator.getCodeLength() - size); + codeAttr.setMaxLocals(orgLocals); + codeAttr.setMaxStack(orgStack); + maxLocals = context.maxLocals; + maxStack += context.maxStack; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java b/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java new file mode 100644 index 0000000..c4711bd --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java @@ -0,0 +1,317 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CannotCompileException; + +/** + * A translator of method bodies. + * + *

The users can define a subclass of this class to customize how to + * modify a method body. The overall architecture is similar to the + * strategy pattern. + * + *

If instrument() is called in + * CtMethod, the method body is scanned from the beginning + * to the end. + * Whenever an expression, such as a method call and a new + * expression (object creation), + * is found, edit() is called in ExprEdit. + * edit() can inspect and modify the given expression. + * The modification is reflected on the original method body. If + * edit() does nothing, the original method body is not + * changed. + * + *

The following code is an example: + * + * 

+ * CtMethod cm = ...;
+ * cm.instrument(new ExprEditor() {
+ *     public void edit(MethodCall m) throws CannotCompileException {
+ *         if (m.getClassName().equals("Point")) {
+ *             System.out.println(m.getMethodName() + " line: "
+ *                                + m.getLineNumber());
+ *     }
+ * });
+ *
+ * + *

This code inspects all method calls appearing in the method represented + * by cm and it prints the names and the line numbers of the + * methods declared in class Point. This code does not modify + * the body of the method represented by cm. If the method + * body must be modified, call replace() + * in MethodCall. + * + * @see javassist.CtClass#instrument(ExprEditor) + * @see javassist.CtMethod#instrument(ExprEditor) + * @see javassist.CtConstructor#instrument(ExprEditor) + * @see MethodCall + * @see NewExpr + * @see FieldAccess + * + * @see javassist.CodeConverter + */ +public class ExprEditor { + /** + * Default constructor. It does nothing. + */ + public ExprEditor() {} + + /** + * Undocumented method. Do not use; internal-use only. + */ + public boolean doit(CtClass clazz, MethodInfo minfo) + throws CannotCompileException + { + CodeAttribute codeAttr = minfo.getCodeAttribute(); + if (codeAttr == null) + return false; + + CodeIterator iterator = codeAttr.iterator(); + boolean edited = false; + LoopContext context = new LoopContext(codeAttr.getMaxLocals()); + + while (iterator.hasNext()) + if (loopBody(iterator, clazz, minfo, context)) + edited = true; + + ExceptionTable et = codeAttr.getExceptionTable(); + int n = et.size(); + for (int i = 0; i < n; ++i) { + Handler h = new Handler(et, i, iterator, clazz, minfo); + edit(h); + if (h.edited()) { + edited = true; + context.updateMax(h.locals(), h.stack()); + } + } + + // codeAttr might be modified by other partiess + // so I check the current value of max-locals. + if (codeAttr.getMaxLocals() < context.maxLocals) + codeAttr.setMaxLocals(context.maxLocals); + + codeAttr.setMaxStack(codeAttr.getMaxStack() + context.maxStack); + try { + if (edited) + minfo.rebuildStackMapIf6(clazz.getClassPool(), + clazz.getClassFile2()); + } + catch (BadBytecode b) { + throw new CannotCompileException(b.getMessage(), b); + } + + return edited; + } + + /** + * Visits each bytecode in the given range. + */ + boolean doit(CtClass clazz, MethodInfo minfo, LoopContext context, + CodeIterator iterator, int endPos) + throws CannotCompileException + { + boolean edited = false; + while (iterator.hasNext() && iterator.lookAhead() < endPos) { + int size = iterator.getCodeLength(); + if (loopBody(iterator, clazz, minfo, context)) { + edited = true; + int size2 = iterator.getCodeLength(); + if (size != size2) // the body was modified. + endPos += size2 - size; + } + } + + return edited; + } + + final static class NewOp { + NewOp next; + int pos; + String type; + + NewOp(NewOp n, int p, String t) { + next = n; + pos = p; + type = t; + } + } + + final static class LoopContext { + NewOp newList; + int maxLocals; + int maxStack; + + LoopContext(int locals) { + maxLocals = locals; + maxStack = 0; + newList = null; + } + + void updateMax(int locals, int stack) { + if (maxLocals < locals) + maxLocals = locals; + + if (maxStack < stack) + maxStack = stack; + } + } + + final boolean loopBody(CodeIterator iterator, CtClass clazz, + MethodInfo minfo, LoopContext context) + throws CannotCompileException + { + try { + Expr expr = null; + int pos = iterator.next(); + int c = iterator.byteAt(pos); + + if (c < Opcode.GETSTATIC) // c < 178 + /* skip */; + else if (c < Opcode.NEWARRAY) { // c < 188 + if (c == Opcode.INVOKESTATIC + || c == Opcode.INVOKEINTERFACE + || c == Opcode.INVOKEVIRTUAL) { + expr = new MethodCall(pos, iterator, clazz, minfo); + edit((MethodCall)expr); + } + else if (c == Opcode.GETFIELD || c == Opcode.GETSTATIC + || c == Opcode.PUTFIELD + || c == Opcode.PUTSTATIC) { + expr = new FieldAccess(pos, iterator, clazz, minfo, c); + edit((FieldAccess)expr); + } + else if (c == Opcode.NEW) { + int index = iterator.u16bitAt(pos + 1); + context.newList = new NewOp(context.newList, pos, + minfo.getConstPool().getClassInfo(index)); + } + else if (c == Opcode.INVOKESPECIAL) { + NewOp newList = context.newList; + if (newList != null + && minfo.getConstPool().isConstructor(newList.type, + iterator.u16bitAt(pos + 1)) > 0) { + expr = new NewExpr(pos, iterator, clazz, minfo, + newList.type, newList.pos); + edit((NewExpr)expr); + context.newList = newList.next; + } + else { + MethodCall mcall = new MethodCall(pos, iterator, clazz, minfo); + if (mcall.getMethodName().equals(MethodInfo.nameInit)) { + ConstructorCall ccall = new ConstructorCall(pos, iterator, clazz, minfo); + expr = ccall; + edit(ccall); + } + else { + expr = mcall; + edit(mcall); + } + } + } + } + else { // c >= 188 + if (c == Opcode.NEWARRAY || c == Opcode.ANEWARRAY + || c == Opcode.MULTIANEWARRAY) { + expr = new NewArray(pos, iterator, clazz, minfo, c); + edit((NewArray)expr); + } + else if (c == Opcode.INSTANCEOF) { + expr = new Instanceof(pos, iterator, clazz, minfo); + edit((Instanceof)expr); + } + else if (c == Opcode.CHECKCAST) { + expr = new Cast(pos, iterator, clazz, minfo); + edit((Cast)expr); + } + } + + if (expr != null && expr.edited()) { + context.updateMax(expr.locals(), expr.stack()); + return true; + } + else + return false; + } + catch (BadBytecode e) { + throw new CannotCompileException(e); + } + } + + /** + * Edits a new expression (overridable). + * The default implementation performs nothing. + * + * @param e the new expression creating an object. + */ + public void edit(NewExpr e) throws CannotCompileException {} + + /** + * Edits an expression for array creation (overridable). + * The default implementation performs nothing. + * + * @param a the new expression for creating an array. + * @throws CannotCompileException + */ + public void edit(NewArray a) throws CannotCompileException {} + + /** + * Edits a method call (overridable). + * + * The default implementation performs nothing. + */ + public void edit(MethodCall m) throws CannotCompileException {} + + /** + * Edits a constructor call (overridable). + * The constructor call is either + * super() or this() + * included in a constructor body. + * + * The default implementation performs nothing. + * + * @see #edit(NewExpr) + */ + public void edit(ConstructorCall c) throws CannotCompileException {} + + /** + * Edits a field-access expression (overridable). + * Field access means both read and write. + * The default implementation performs nothing. + */ + public void edit(FieldAccess f) throws CannotCompileException {} + + /** + * Edits an instanceof expression (overridable). + * The default implementation performs nothing. + */ + public void edit(Instanceof i) throws CannotCompileException {} + + /** + * Edits an expression for explicit type casting (overridable). + * The default implementation performs nothing. + */ + public void edit(Cast c) throws CannotCompileException {} + + /** + * Edits a catch clause (overridable). + * The default implementation performs nothing. + */ + public void edit(Handler h) throws CannotCompileException {} +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java b/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java new file mode 100644 index 0000000..523277e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java @@ -0,0 +1,325 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * Expression for accessing a field. + */ +public class FieldAccess extends Expr { + int opcode; + + protected FieldAccess(int pos, CodeIterator i, CtClass declaring, + MethodInfo m, int op) { + super(pos, i, declaring, m); + opcode = op; + } + + /** + * Returns the method or constructor containing the field-access + * expression represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * field access. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the field access. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns true if the field is static. + */ + public boolean isStatic() { + return isStatic(opcode); + } + + static boolean isStatic(int c) { + return c == Opcode.GETSTATIC || c == Opcode.PUTSTATIC; + } + + /** + * Returns true if the field is read. + */ + public boolean isReader() { + return opcode == Opcode.GETFIELD || opcode == Opcode.GETSTATIC; + } + + /** + * Returns true if the field is written in. + */ + public boolean isWriter() { + return opcode == Opcode.PUTFIELD || opcode == Opcode.PUTSTATIC; + } + + /** + * Returns the class in which the field is declared. + */ + private CtClass getCtClass() throws NotFoundException { + return thisClass.getClassPool().get(getClassName()); + } + + /** + * Returns the name of the class in which the field is declared. + */ + public String getClassName() { + int index = iterator.u16bitAt(currentPos + 1); + return getConstPool().getFieldrefClassName(index); + } + + /** + * Returns the name of the field. + */ + public String getFieldName() { + int index = iterator.u16bitAt(currentPos + 1); + return getConstPool().getFieldrefName(index); + } + + /** + * Returns the field accessed by this expression. + */ + public CtField getField() throws NotFoundException { + CtClass cc = getCtClass(); + int index = iterator.u16bitAt(currentPos + 1); + ConstPool cp = getConstPool(); + return cc.getField(cp.getFieldrefName(index), cp.getFieldrefType(index)); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Returns the signature of the field type. + * The signature is represented by a character string + * called field descriptor, which is defined in the JVM specification. + * + * @see javassist.bytecode.Descriptor#toCtClass(String, ClassPool) + * @since 3.1 + */ + public String getSignature() { + int index = iterator.u16bitAt(currentPos + 1); + return getConstPool().getFieldrefType(index); + } + + /** + * Replaces the method call with the bytecode derived from + * the given source text. + * + *

$0 is available even if the called method is static. + * If the field access is writing, $_ is available but the value + * of $_ is ignored. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + thisClass.getClassFile(); // to call checkModify(). + ConstPool constPool = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + + Javac jc = new Javac(thisClass); + CodeAttribute ca = iterator.get(); + try { + CtClass[] params; + CtClass retType; + CtClass fieldType + = Descriptor.toCtClass(constPool.getFieldrefType(index), + thisClass.getClassPool()); + boolean read = isReader(); + if (read) { + params = new CtClass[0]; + retType = fieldType; + } + else { + params = new CtClass[1]; + params[0] = fieldType; + retType = CtClass.voidType; + } + + int paramVar = ca.getMaxLocals(); + jc.recordParams(constPool.getFieldrefClassName(index), params, + true, paramVar, withinStatic()); + + /* Is $_ included in the source code? + */ + boolean included = checkResultValue(retType, statement); + if (read) + included = true; + + int retVar = jc.recordReturnType(retType, included); + if (read) + jc.recordProceed(new ProceedForRead(retType, opcode, + index, paramVar)); + else { + // because $type is not the return type... + jc.recordType(fieldType); + jc.recordProceed(new ProceedForWrite(params[0], opcode, + index, paramVar)); + } + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, isStatic(), paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + if (included) + if (retType == CtClass.voidType) { + bytecode.addOpcode(ACONST_NULL); + bytecode.addAstore(retVar); + } + else { + bytecode.addConstZero(retType); + bytecode.addStore(retVar, retType); // initialize $_ + } + + jc.compileStmnt(statement); + if (read) + bytecode.addLoad(retVar, retType); + + replace0(pos, bytecode, 3); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } + + /* $proceed() + */ + static class ProceedForRead implements ProceedHandler { + CtClass fieldType; + int opcode; + int targetVar, index; + + ProceedForRead(CtClass type, int op, int i, int var) { + fieldType = type; + targetVar = var; + opcode = op; + index = i; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + if (args != null && !gen.isParamListName(args)) + throw new CompileError(Javac.proceedName + + "() cannot take a parameter for field reading"); + + int stack; + if (isStatic(opcode)) + stack = 0; + else { + stack = -1; + bytecode.addAload(targetVar); + } + + if (fieldType instanceof CtPrimitiveType) + stack += ((CtPrimitiveType)fieldType).getDataSize(); + else + ++stack; + + bytecode.add(opcode); + bytecode.addIndex(index); + bytecode.growStack(stack); + gen.setType(fieldType); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.setType(fieldType); + } + } + + /* void $proceed() + * the return type is not the field type but void. + */ + static class ProceedForWrite implements ProceedHandler { + CtClass fieldType; + int opcode; + int targetVar, index; + + ProceedForWrite(CtClass type, int op, int i, int var) { + fieldType = type; + targetVar = var; + opcode = op; + index = i; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + if (gen.getMethodArgsLength(args) != 1) + throw new CompileError(Javac.proceedName + + "() cannot take more than one parameter " + + "for field writing"); + + int stack; + if (isStatic(opcode)) + stack = 0; + else { + stack = -1; + bytecode.addAload(targetVar); + } + + gen.atMethodArgs(args, new int[1], new int[1], new String[1]); + gen.doNumCast(fieldType); + if (fieldType instanceof CtPrimitiveType) + stack -= ((CtPrimitiveType)fieldType).getDataSize(); + else + --stack; + + bytecode.add(opcode); + bytecode.addIndex(index); + bytecode.growStack(stack); + gen.setType(CtClass.voidType); + gen.addNullIfVoid(); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.atMethodArgs(args, new int[1], new int[1], new String[1]); + c.setType(CtClass.voidType); + c.addNullIfVoid(); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java b/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java new file mode 100644 index 0000000..66665c3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java @@ -0,0 +1,146 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; + +/** + * A catch clause or a finally block. + */ +public class Handler extends Expr { + private static String EXCEPTION_NAME = "$1"; + private ExceptionTable etable; + private int index; + + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected Handler(ExceptionTable et, int nth, + CodeIterator it, CtClass declaring, MethodInfo m) { + super(et.handlerPc(nth), it, declaring, m); + etable = et; + index = nth; + } + + /** + * Returns the method or constructor containing the catch clause. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the source line number of the catch clause. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the catch clause. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the list of exceptions that the catch clause may throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Returns the type handled by the catch clause. + * If this is a finally block, null is returned. + */ + public CtClass getType() throws NotFoundException { + int type = etable.catchType(index); + if (type == 0) + return null; + else { + ConstPool cp = getConstPool(); + String name = cp.getClassInfo(type); + return thisClass.getClassPool().getCtClass(name); + } + } + + /** + * Returns true if this is a finally block. + */ + public boolean isFinally() { + return etable.catchType(index) == 0; + } + + /** + * This method has not been implemented yet. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + throw new RuntimeException("not implemented yet"); + } + + /** + * Inserts bytecode at the beginning of the catch clause. + * The caught exception is stored in $1. + * + * @param src the source code representing the inserted bytecode. + * It must be a single statement or block. + */ + public void insertBefore(String src) throws CannotCompileException { + edited = true; + + ConstPool cp = getConstPool(); + CodeAttribute ca = iterator.get(); + Javac jv = new Javac(thisClass); + Bytecode b = jv.getBytecode(); + b.setStackDepth(1); + b.setMaxLocals(ca.getMaxLocals()); + + try { + CtClass type = getType(); + int var = jv.recordVariable(type, EXCEPTION_NAME); + jv.recordReturnType(type, false); + b.addAstore(var); + jv.compileStmnt(src); + b.addAload(var); + + int oldHandler = etable.handlerPc(index); + b.addOpcode(Opcode.GOTO); + b.addIndex(oldHandler - iterator.getCodeLength() + - b.currentPc() + 1); + + maxStack = b.getMaxStack(); + maxLocals = b.getMaxLocals(); + + int pos = iterator.append(b.get()); + iterator.append(b.getExceptionTable(), pos); + etable.setHandlerPc(index, pos); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + catch (CompileError e) { + throw new CannotCompileException(e); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java b/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java new file mode 100644 index 0000000..1ea4ee1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java @@ -0,0 +1,170 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * Instanceof operator. + */ +public class Instanceof extends Expr { + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected Instanceof(int pos, CodeIterator i, CtClass declaring, + MethodInfo m) { + super(pos, i, declaring, m); + } + + /** + * Returns the method or constructor containing the instanceof + * expression represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * instanceof expression. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the + * instanceof expression. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the CtClass object representing + * the type name on the right hand side + * of the instanceof operator. + */ + public CtClass getType() throws NotFoundException { + ConstPool cp = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + String name = cp.getClassInfo(index); + return thisClass.getClassPool().getCtClass(name); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Replaces the instanceof operator with the bytecode derived from + * the given source text. + * + *

$0 is available but the value is null. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + thisClass.getClassFile(); // to call checkModify(). + ConstPool constPool = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + + Javac jc = new Javac(thisClass); + ClassPool cp = thisClass.getClassPool(); + CodeAttribute ca = iterator.get(); + + try { + CtClass[] params + = new CtClass[] { cp.get(javaLangObject) }; + CtClass retType = CtClass.booleanType; + + int paramVar = ca.getMaxLocals(); + jc.recordParams(javaLangObject, params, true, paramVar, + withinStatic()); + int retVar = jc.recordReturnType(retType, true); + jc.recordProceed(new ProceedForInstanceof(index)); + + // because $type is not the return type... + jc.recordType(getType()); + + /* Is $_ included in the source code? + */ + checkResultValue(retType, statement); + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, true, paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + bytecode.addConstZero(retType); + bytecode.addStore(retVar, retType); // initialize $_ + + jc.compileStmnt(statement); + bytecode.addLoad(retVar, retType); + + replace0(pos, bytecode, 3); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } + + /* boolean $proceed(Object obj) + */ + static class ProceedForInstanceof implements ProceedHandler { + int index; + + ProceedForInstanceof(int i) { + index = i; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + if (gen.getMethodArgsLength(args) != 1) + throw new CompileError(Javac.proceedName + + "() cannot take more than one parameter " + + "for instanceof"); + + gen.atMethodArgs(args, new int[1], new int[1], new String[1]); + bytecode.addOpcode(Opcode.INSTANCEOF); + bytecode.addIndex(index); + gen.setType(CtClass.booleanType); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.atMethodArgs(args, new int[1], new int[1], new String[1]); + c.setType(CtClass.booleanType); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java b/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java new file mode 100644 index 0000000..70496b1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java @@ -0,0 +1,247 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; + +/** + * Method invocation (caller-side expression). + */ +public class MethodCall extends Expr { + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected MethodCall(int pos, CodeIterator i, CtClass declaring, + MethodInfo m) { + super(pos, i, declaring, m); + } + + private int getNameAndType(ConstPool cp) { + int pos = currentPos; + int c = iterator.byteAt(pos); + int index = iterator.u16bitAt(pos + 1); + + if (c == INVOKEINTERFACE) + return cp.getInterfaceMethodrefNameAndType(index); + else + return cp.getMethodrefNameAndType(index); + } + + /** + * Returns the method or constructor containing the method-call + * expression represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * method call. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the method call. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the class of the target object, + * which the method is called on. + */ + protected CtClass getCtClass() throws NotFoundException { + return thisClass.getClassPool().get(getClassName()); + } + + /** + * Returns the class name of the target object, + * which the method is called on. + */ + public String getClassName() { + String cname; + + ConstPool cp = getConstPool(); + int pos = currentPos; + int c = iterator.byteAt(pos); + int index = iterator.u16bitAt(pos + 1); + + if (c == INVOKEINTERFACE) + cname = cp.getInterfaceMethodrefClassName(index); + else + cname = cp.getMethodrefClassName(index); + + if (cname.charAt(0) == '[') + cname = Descriptor.toClassName(cname); + + return cname; + } + + /** + * Returns the name of the called method. + */ + public String getMethodName() { + ConstPool cp = getConstPool(); + int nt = getNameAndType(cp); + return cp.getUtf8Info(cp.getNameAndTypeName(nt)); + } + + /** + * Returns the called method. + */ + public CtMethod getMethod() throws NotFoundException { + return getCtClass().getMethod(getMethodName(), getSignature()); + } + + /** + * Returns the method signature (the parameter types + * and the return type). + * The method signature is represented by a character string + * called method descriptor, which is defined in the JVM specification. + * + * @see javassist.CtBehavior#getSignature() + * @see javassist.bytecode.Descriptor + * @since 3.1 + */ + public String getSignature() { + ConstPool cp = getConstPool(); + int nt = getNameAndType(cp); + return cp.getUtf8Info(cp.getNameAndTypeDescriptor(nt)); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Returns true if the called method is of a superclass of the current + * class. + */ + public boolean isSuper() { + return iterator.byteAt(currentPos) == INVOKESPECIAL + && !where().getDeclaringClass().getName().equals(getClassName()); + } + + /* + * Returns the parameter types of the called method. + + public CtClass[] getParameterTypes() throws NotFoundException { + return Descriptor.getParameterTypes(getMethodDesc(), + thisClass.getClassPool()); + } + */ + + /* + * Returns the return type of the called method. + + public CtClass getReturnType() throws NotFoundException { + return Descriptor.getReturnType(getMethodDesc(), + thisClass.getClassPool()); + } + */ + + /** + * Replaces the method call with the bytecode derived from + * the given source text. + * + *

$0 is available even if the called method is static. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + thisClass.getClassFile(); // to call checkModify(). + ConstPool constPool = getConstPool(); + int pos = currentPos; + int index = iterator.u16bitAt(pos + 1); + + String classname, methodname, signature; + int opcodeSize; + int c = iterator.byteAt(pos); + if (c == INVOKEINTERFACE) { + opcodeSize = 5; + classname = constPool.getInterfaceMethodrefClassName(index); + methodname = constPool.getInterfaceMethodrefName(index); + signature = constPool.getInterfaceMethodrefType(index); + } + else if (c == INVOKESTATIC + || c == INVOKESPECIAL || c == INVOKEVIRTUAL) { + opcodeSize = 3; + classname = constPool.getMethodrefClassName(index); + methodname = constPool.getMethodrefName(index); + signature = constPool.getMethodrefType(index); + } + else + throw new CannotCompileException("not method invocation"); + + Javac jc = new Javac(thisClass); + ClassPool cp = thisClass.getClassPool(); + CodeAttribute ca = iterator.get(); + try { + CtClass[] params = Descriptor.getParameterTypes(signature, cp); + CtClass retType = Descriptor.getReturnType(signature, cp); + int paramVar = ca.getMaxLocals(); + jc.recordParams(classname, params, + true, paramVar, withinStatic()); + int retVar = jc.recordReturnType(retType, true); + if (c == INVOKESTATIC) + jc.recordStaticProceed(classname, methodname); + else if (c == INVOKESPECIAL) + jc.recordSpecialProceed(Javac.param0Name, classname, + methodname, signature); + else + jc.recordProceed(Javac.param0Name, methodname); + + /* Is $_ included in the source code? + */ + checkResultValue(retType, statement); + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, c == INVOKESTATIC, paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + if (retType != CtClass.voidType) { + bytecode.addConstZero(retType); + bytecode.addStore(retVar, retType); // initialize $_ + } + + jc.compileStmnt(statement); + if (retType != CtClass.voidType) + bytecode.addLoad(retVar, retType); + + replace0(pos, bytecode, opcodeSize); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java b/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java new file mode 100644 index 0000000..1c8f1e6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java @@ -0,0 +1,283 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * Array creation. + * + *

This class does not provide methods for obtaining the initial + * values of array elements. + */ +public class NewArray extends Expr { + int opcode; + + protected NewArray(int pos, CodeIterator i, CtClass declaring, + MethodInfo m, int op) { + super(pos, i, declaring, m); + opcode = op; + } + + /** + * Returns the method or constructor containing the array creation + * represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * array creation. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the array creation. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /** + * Returns the type of array components. If the created array is + * a two-dimensional array of int, + * the type returned by this method is + * not int[] but int. + */ + public CtClass getComponentType() throws NotFoundException { + if (opcode == Opcode.NEWARRAY) { + int atype = iterator.byteAt(currentPos + 1); + return getPrimitiveType(atype); + } + else if (opcode == Opcode.ANEWARRAY + || opcode == Opcode.MULTIANEWARRAY) { + int index = iterator.u16bitAt(currentPos + 1); + String desc = getConstPool().getClassInfo(index); + int dim = Descriptor.arrayDimension(desc); + desc = Descriptor.toArrayComponent(desc, dim); + return Descriptor.toCtClass(desc, thisClass.getClassPool()); + } + else + throw new RuntimeException("bad opcode: " + opcode); + } + + CtClass getPrimitiveType(int atype) { + switch (atype) { + case Opcode.T_BOOLEAN : + return CtClass.booleanType; + case Opcode.T_CHAR : + return CtClass.charType; + case Opcode.T_FLOAT : + return CtClass.floatType; + case Opcode.T_DOUBLE : + return CtClass.doubleType; + case Opcode.T_BYTE : + return CtClass.byteType; + case Opcode.T_SHORT : + return CtClass.shortType; + case Opcode.T_INT : + return CtClass.intType; + case Opcode.T_LONG : + return CtClass.longType; + default : + throw new RuntimeException("bad atype: " + atype); + } + } + + /** + * Returns the dimension of the created array. + */ + public int getDimension() { + if (opcode == Opcode.NEWARRAY) + return 1; + else if (opcode == Opcode.ANEWARRAY + || opcode == Opcode.MULTIANEWARRAY) { + int index = iterator.u16bitAt(currentPos + 1); + String desc = getConstPool().getClassInfo(index); + return Descriptor.arrayDimension(desc) + + (opcode == Opcode.ANEWARRAY ? 1 : 0); + } + else + throw new RuntimeException("bad opcode: " + opcode); + } + + /** + * Returns the number of dimensions of arrays to be created. + * If the opcode is multianewarray, this method returns the second + * operand. Otherwise, it returns 1. + */ + public int getCreatedDimensions() { + if (opcode == Opcode.MULTIANEWARRAY) + return iterator.byteAt(currentPos + 3); + else + return 1; + } + + /** + * Replaces the array creation with the bytecode derived from + * the given source text. + * + *

$0 is available even if the called method is static. + * If the field access is writing, $_ is available but the value + * of $_ is ignored. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + try { + replace2(statement); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } + + private void replace2(String statement) + throws CompileError, NotFoundException, BadBytecode, + CannotCompileException + { + thisClass.getClassFile(); // to call checkModify(). + ConstPool constPool = getConstPool(); + int pos = currentPos; + CtClass retType; + int codeLength; + int index = 0; + int dim = 1; + String desc; + if (opcode == Opcode.NEWARRAY) { + index = iterator.byteAt(currentPos + 1); // atype + CtPrimitiveType cpt = (CtPrimitiveType)getPrimitiveType(index); + desc = "[" + cpt.getDescriptor(); + codeLength = 2; + } + else if (opcode == Opcode.ANEWARRAY) { + index = iterator.u16bitAt(pos + 1); + desc = constPool.getClassInfo(index); + if (desc.startsWith("[")) + desc = "[" + desc; + else + desc = "[L" + desc + ";"; + + codeLength = 3; + } + else if (opcode == Opcode.MULTIANEWARRAY) { + index = iterator.u16bitAt(currentPos + 1); + desc = constPool.getClassInfo(index); + dim = iterator.byteAt(currentPos + 3); + codeLength = 4; + } + else + throw new RuntimeException("bad opcode: " + opcode); + + retType = Descriptor.toCtClass(desc, thisClass.getClassPool()); + + Javac jc = new Javac(thisClass); + CodeAttribute ca = iterator.get(); + + CtClass[] params = new CtClass[dim]; + for (int i = 0; i < dim; ++i) + params[i] = CtClass.intType; + + int paramVar = ca.getMaxLocals(); + jc.recordParams(javaLangObject, params, + true, paramVar, withinStatic()); + + /* Is $_ included in the source code? + */ + checkResultValue(retType, statement); + int retVar = jc.recordReturnType(retType, true); + jc.recordProceed(new ProceedForArray(retType, opcode, index, dim)); + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, true, paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + bytecode.addOpcode(ACONST_NULL); // initialize $_ + bytecode.addAstore(retVar); + + jc.compileStmnt(statement); + bytecode.addAload(retVar); + + replace0(pos, bytecode, codeLength); + } + + /* $proceed( ..) + */ + static class ProceedForArray implements ProceedHandler { + CtClass arrayType; + int opcode; + int index, dimension; + + ProceedForArray(CtClass type, int op, int i, int dim) { + arrayType = type; + opcode = op; + index = i; + dimension = dim; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + int num = gen.getMethodArgsLength(args); + if (num != dimension) + throw new CompileError(Javac.proceedName + + "() with a wrong number of parameters"); + + gen.atMethodArgs(args, new int[num], + new int[num], new String[num]); + bytecode.addOpcode(opcode); + if (opcode == Opcode.ANEWARRAY) + bytecode.addIndex(index); + else if (opcode == Opcode.NEWARRAY) + bytecode.add(index); + else /* if (opcode == Opcode.MULTIANEWARRAY) */ { + bytecode.addIndex(index); + bytecode.add(dimension); + bytecode.growStack(1 - dimension); + } + + gen.setType(arrayType); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.setType(arrayType); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java b/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java new file mode 100644 index 0000000..e3f1a14 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java @@ -0,0 +1,249 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.expr; + +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.bytecode.*; +import com.wenshuo.agent.javassist.compiler.*; +import com.wenshuo.agent.javassist.compiler.ast.ASTList; + +/** + * Object creation (new expression). + */ +public class NewExpr extends Expr { + String newTypeName; + int newPos; + + /** + * Undocumented constructor. Do not use; internal-use only. + */ + protected NewExpr(int pos, CodeIterator i, CtClass declaring, + MethodInfo m, String type, int np) { + super(pos, i, declaring, m); + newTypeName = type; + newPos = np; + } + + /* + * Not used + * + private int getNameAndType(ConstPool cp) { + int pos = currentPos; + int c = iterator.byteAt(pos); + int index = iterator.u16bitAt(pos + 1); + + if (c == INVOKEINTERFACE) + return cp.getInterfaceMethodrefNameAndType(index); + else + return cp.getMethodrefNameAndType(index); + } */ + + /** + * Returns the method or constructor containing the new + * expression represented by this object. + */ + public CtBehavior where() { return super.where(); } + + /** + * Returns the line number of the source line containing the + * new expression. + * + * @return -1 if this information is not available. + */ + public int getLineNumber() { + return super.getLineNumber(); + } + + /** + * Returns the source file containing the new expression. + * + * @return null if this information is not available. + */ + public String getFileName() { + return super.getFileName(); + } + + /** + * Returns the class of the created object. + */ + private CtClass getCtClass() throws NotFoundException { + return thisClass.getClassPool().get(newTypeName); + } + + /** + * Returns the class name of the created object. + */ + public String getClassName() { + return newTypeName; + } + + /** + * Get the signature of the constructor + * + * The signature is represented by a character string + * called method descriptor, which is defined in the JVM specification. + * + * @see javassist.CtBehavior#getSignature() + * @see javassist.bytecode.Descriptor + * @return the signature + */ + public String getSignature() { + ConstPool constPool = getConstPool(); + int methodIndex = iterator.u16bitAt(currentPos + 1); // constructor + return constPool.getMethodrefType(methodIndex); + } + + /** + * Returns the constructor called for creating the object. + */ + public CtConstructor getConstructor() throws NotFoundException { + ConstPool cp = getConstPool(); + int index = iterator.u16bitAt(currentPos + 1); + String desc = cp.getMethodrefType(index); + return getCtClass().getConstructor(desc); + } + + /** + * Returns the list of exceptions that the expression may throw. + * This list includes both the exceptions that the try-catch statements + * including the expression can catch and the exceptions that + * the throws declaration allows the method to throw. + */ + public CtClass[] mayThrow() { + return super.mayThrow(); + } + + /* + * Returns the parameter types of the constructor. + + public CtClass[] getParameterTypes() throws NotFoundException { + ConstPool cp = getConstPool(); + int index = iterator.u16bitAt(currentPos + 1); + String desc = cp.getMethodrefType(index); + return Descriptor.getParameterTypes(desc, thisClass.getClassPool()); + } + */ + + private int canReplace() throws CannotCompileException { + int op = iterator.byteAt(newPos + 3); + if (op == Opcode.DUP) // Typical single DUP or Javaflow DUP DUP2_X2 POP2 + return ((iterator.byteAt(newPos + 4) == Opcode.DUP2_X2 + && iterator.byteAt(newPos + 5) == Opcode.POP2)) ? 6 : 4; + else if (op == Opcode.DUP_X1 + && iterator.byteAt(newPos + 4) == Opcode.SWAP) + return 5; + else + return 3; // for Eclipse. The generated code may include no DUP. + // throw new CannotCompileException( + // "sorry, cannot edit NEW followed by no DUP"); + } + + /** + * Replaces the new expression with the bytecode derived from + * the given source text. + * + *

$0 is available but the value is null. + * + * @param statement a Java statement except try-catch. + */ + public void replace(String statement) throws CannotCompileException { + thisClass.getClassFile(); // to call checkModify(). + + final int bytecodeSize = 3; + int pos = newPos; + + int newIndex = iterator.u16bitAt(pos + 1); + + /* delete the preceding NEW and DUP (or DUP_X1, SWAP) instructions. + */ + int codeSize = canReplace(); + int end = pos + codeSize; + for (int i = pos; i < end; ++i) + iterator.writeByte(NOP, i); + + ConstPool constPool = getConstPool(); + pos = currentPos; + int methodIndex = iterator.u16bitAt(pos + 1); // constructor + + String signature = constPool.getMethodrefType(methodIndex); + + Javac jc = new Javac(thisClass); + ClassPool cp = thisClass.getClassPool(); + CodeAttribute ca = iterator.get(); + try { + CtClass[] params = Descriptor.getParameterTypes(signature, cp); + CtClass newType = cp.get(newTypeName); + int paramVar = ca.getMaxLocals(); + jc.recordParams(newTypeName, params, + true, paramVar, withinStatic()); + int retVar = jc.recordReturnType(newType, true); + jc.recordProceed(new ProceedForNew(newType, newIndex, + methodIndex)); + + /* Is $_ included in the source code? + */ + checkResultValue(newType, statement); + + Bytecode bytecode = jc.getBytecode(); + storeStack(params, true, paramVar, bytecode); + jc.recordLocalVariables(ca, pos); + + bytecode.addConstZero(newType); + bytecode.addStore(retVar, newType); // initialize $_ + + jc.compileStmnt(statement); + if (codeSize > 3) // if the original code includes DUP. + bytecode.addAload(retVar); + + replace0(pos, bytecode, bytecodeSize); + } + catch (CompileError e) { throw new CannotCompileException(e); } + catch (NotFoundException e) { throw new CannotCompileException(e); } + catch (BadBytecode e) { + throw new CannotCompileException("broken method"); + } + } + + static class ProceedForNew implements ProceedHandler { + CtClass newType; + int newIndex, methodIndex; + + ProceedForNew(CtClass nt, int ni, int mi) { + newType = nt; + newIndex = ni; + methodIndex = mi; + } + + public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args) + throws CompileError + { + bytecode.addOpcode(NEW); + bytecode.addIndex(newIndex); + bytecode.addOpcode(DUP); + gen.atMethodCallCore(newType, MethodInfo.nameInit, args, + false, true, -1, null); + gen.setType(newType); + } + + public void setReturnType(JvstTypeChecker c, ASTList args) + throws CompileError + { + c.atMethodCallCore(newType, MethodInfo.nameInit, args); + c.setType(newType); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/package.html b/src/main/java/com/wenshuo/agent/javassist/expr/package.html new file mode 100644 index 0000000..12a2c63 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/expr/package.html @@ -0,0 +1,8 @@ + + + +

This package contains the classes for modifying a method body. +See ExprEditor (expression editor) for more details. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/package.html b/src/main/java/com/wenshuo/agent/javassist/package.html new file mode 100644 index 0000000..f5b66b9 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/package.html @@ -0,0 +1,22 @@ + + +The Javassist Core API. + +

Javassist (Java programming assistant) makes bytecode +engineering simple. It is a class library for editing +bytecode in Java; it enables Java programs to define a new class at +runtime and to modify a given class file when the JVM loads it. + +

The most significant class of this package is CtClass. +See the description of this class first. + +

To know the version number of this package, type the following command: + +

    +java -jar javassist.jar
+
+ +

It prints the version number on the console. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java b/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java new file mode 100644 index 0000000..f2c7b6a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java @@ -0,0 +1,53 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.runtime; + +/** + * A support class for implementing $cflow. + * This support class is required at runtime + * only if $cflow is used. + * + * @see javassist.CtBehavior#useCflow(String) + */ +public class Cflow extends ThreadLocal { + private static class Depth { + private int depth; + Depth() { depth = 0; } + int get() { return depth; } + void inc() { ++depth; } + void dec() { --depth; } + } + + protected synchronized Object initialValue() { + return new Depth(); + } + + /** + * Increments the counter. + */ + public void enter() { ((Depth)get()).inc(); } + + /** + * Decrements the counter. + */ + public void exit() { ((Depth)get()).dec(); } + + /** + * Returns the value of the counter. + */ + public int value() { return ((Depth)get()).get(); } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java b/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java new file mode 100644 index 0000000..e8ed8bf --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java @@ -0,0 +1,161 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.runtime; + +/** + * A support class for implementing $sig and + * $type. + * This support class is required at runtime + * only if $sig or $type is used. + */ +public class Desc { + + /** + * Specifies how a java.lang.Class object is loaded. + * + *

If true, it is loaded by: + * 

Thread.currentThread().getContextClassLoader().loadClass()
+ *

If false, it is loaded by Class.forName(). + * The default value is false. + */ + public static boolean useContextClassLoader = false; + + private static Class getClassObject(String name) + throws ClassNotFoundException + { + if (useContextClassLoader) + return Class.forName(name, true, Thread.currentThread().getContextClassLoader()); + else + return Class.forName(name); + } + + /** + * Interprets the given class name. + * It is used for implementing $class. + */ + public static Class getClazz(String name) { + try { + return getClassObject(name); + } + catch (ClassNotFoundException e) { + throw new RuntimeException( + "$class: internal error, could not find class '" + name + + "' (Desc.useContextClassLoader: " + + Boolean.toString(useContextClassLoader) + ")", e); + } + } + + /** + * Interprets the given type descriptor representing a method + * signature. It is used for implementing $sig. + */ + public static Class[] getParams(String desc) { + if (desc.charAt(0) != '(') + throw new RuntimeException("$sig: internal error"); + + return getType(desc, desc.length(), 1, 0); + } + + /** + * Interprets the given type descriptor. + * It is used for implementing $type. + */ + public static Class getType(String desc) { + Class[] result = getType(desc, desc.length(), 0, 0); + if (result == null || result.length != 1) + throw new RuntimeException("$type: internal error"); + + return result[0]; + } + + private static Class[] getType(String desc, int descLen, + int start, int num) { + Class clazz; + if (start >= descLen) + return new Class[num]; + + char c = desc.charAt(start); + switch (c) { + case 'Z' : + clazz = Boolean.TYPE; + break; + case 'C' : + clazz = Character.TYPE; + break; + case 'B' : + clazz = Byte.TYPE; + break; + case 'S' : + clazz = Short.TYPE; + break; + case 'I' : + clazz = Integer.TYPE; + break; + case 'J' : + clazz = Long.TYPE; + break; + case 'F' : + clazz = Float.TYPE; + break; + case 'D' : + clazz = Double.TYPE; + break; + case 'V' : + clazz = Void.TYPE; + break; + case 'L' : + case '[' : + return getClassType(desc, descLen, start, num); + default : + return new Class[num]; + } + + Class[] result = getType(desc, descLen, start + 1, num + 1); + result[num] = clazz; + return result; + } + + private static Class[] getClassType(String desc, int descLen, + int start, int num) { + int end = start; + while (desc.charAt(end) == '[') + ++end; + + if (desc.charAt(end) == 'L') { + end = desc.indexOf(';', end); + if (end < 0) + throw new IndexOutOfBoundsException("bad descriptor"); + } + + String cname; + if (desc.charAt(start) == 'L') + cname = desc.substring(start + 1, end); + else + cname = desc.substring(start, end + 1); + + Class[] result = getType(desc, descLen, end + 1, num + 1); + try { + result[num] = getClassObject(cname.replace('/', '.')); + } + catch (ClassNotFoundException e) { + // "new RuntimeException(e)" is not available in JDK 1.3. + throw new RuntimeException(e.getMessage()); + } + + return result; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java b/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java new file mode 100644 index 0000000..e3adef4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java @@ -0,0 +1,29 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.runtime; + +/** + * A support class for implementing .class notation. + * This is required at runtime + * only if .class notation is used in source code given + * to the Javassist compiler. + */ +public class DotClass { + public static NoClassDefFoundError fail(ClassNotFoundException e) { + return new NoClassDefFoundError(e.getMessage()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java b/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java new file mode 100644 index 0000000..e51ab88 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java @@ -0,0 +1,25 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.runtime; + +/** + * A support class for compiling a method declared in an inner class. + * This support class is required at runtime + * only if the method calls a private constructor in the enclosing class. + */ +public class Inner { +} diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/package.html b/src/main/java/com/wenshuo/agent/javassist/runtime/package.html new file mode 100644 index 0000000..313648f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/runtime/package.html @@ -0,0 +1,12 @@ + + +Runtime support classes required by modified bytecode. + +

This package includes support classes that may be required by +classes modified with Javassist. Note that most of the modified +classes do not require these support classes. See the documentation +of every support class to know which kind of modification needs +a support class. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java new file mode 100644 index 0000000..ce0dbd8 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java @@ -0,0 +1,309 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import java.lang.ref.WeakReference; +import java.security.ProtectionDomain; +import java.util.Iterator; +import java.util.Map; +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.LoaderClassPath; +import com.wenshuo.agent.javassist.NotFoundException; + +/** + * A scoped class pool. + * + * @author Bill Burke + * @author Adrian Brock + * @author Kabir Khan + * @version $Revision: 1.8 $ + */ +public class ScopedClassPool extends ClassPool { + protected ScopedClassPoolRepository repository; + + protected WeakReference classLoader; + + protected LoaderClassPath classPath; + + protected SoftValueHashMap softcache = new SoftValueHashMap(); + + boolean isBootstrapCl = true; + + static { + ClassPool.doPruning = false; + ClassPool.releaseUnmodifiedClassFile = false; + } + + /** + * Create a new ScopedClassPool. + * + * @param cl + * the classloader + * @param src + * the original class pool + * @param repository + * the repository + *@deprecated + */ + protected ScopedClassPool(ClassLoader cl, ClassPool src, + ScopedClassPoolRepository repository) { + this(cl, src, repository, false); + } + + /** + * Create a new ScopedClassPool. + * + * @param cl + * the classloader + * @param src + * the original class pool + * @param repository + * the repository + * @param isTemp + * Whether this is a temporary pool used to resolve references + */ + protected ScopedClassPool(ClassLoader cl, ClassPool src, ScopedClassPoolRepository repository, boolean isTemp) + { + super(src); + this.repository = repository; + this.classLoader = new WeakReference(cl); + if (cl != null) { + classPath = new LoaderClassPath(cl); + this.insertClassPath(classPath); + } + childFirstLookup = true; + if (!isTemp && cl == null) + { + isBootstrapCl = true; + } + } + + /** + * Get the class loader + * + * @return the class loader + */ + public ClassLoader getClassLoader() { + ClassLoader cl = getClassLoader0(); + if (cl == null && !isBootstrapCl) + { + throw new IllegalStateException( + "ClassLoader has been garbage collected"); + } + return cl; + } + + protected ClassLoader getClassLoader0() { + return (ClassLoader)classLoader.get(); + } + + /** + * Close the class pool + */ + public void close() { + this.removeClassPath(classPath); + classPath.close(); + classes.clear(); + softcache.clear(); + } + + /** + * Flush a class + * + * @param classname + * the class to flush + */ + public synchronized void flushClass(String classname) { + classes.remove(classname); + softcache.remove(classname); + } + + /** + * Soften a class + * + * @param clazz + * the class + */ + public synchronized void soften(CtClass clazz) { + if (repository.isPrune()) + clazz.prune(); + classes.remove(clazz.getName()); + softcache.put(clazz.getName(), clazz); + } + + /** + * Whether the classloader is loader + * + * @return false always + */ + public boolean isUnloadedClassLoader() { + return false; + } + + /** + * Get the cached class + * + * @param classname + * the class name + * @return the class + */ + protected CtClass getCached(String classname) { + CtClass clazz = getCachedLocally(classname); + if (clazz == null) { + boolean isLocal = false; + + ClassLoader dcl = getClassLoader0(); + if (dcl != null) { + final int lastIndex = classname.lastIndexOf('$'); + String classResourceName = null; + if (lastIndex < 0) { + classResourceName = classname.replaceAll("[\\.]", "/") + + ".class"; + } + else { + classResourceName = classname.substring(0, lastIndex) + .replaceAll("[\\.]", "/") + + classname.substring(lastIndex) + ".class"; + } + + isLocal = dcl.getResource(classResourceName) != null; + } + + if (!isLocal) { + Map registeredCLs = repository.getRegisteredCLs(); + synchronized (registeredCLs) { + Iterator it = registeredCLs.values().iterator(); + while (it.hasNext()) { + ScopedClassPool pool = (ScopedClassPool)it.next(); + if (pool.isUnloadedClassLoader()) { + repository.unregisterClassLoader(pool + .getClassLoader()); + continue; + } + + clazz = pool.getCachedLocally(classname); + if (clazz != null) { + return clazz; + } + } + } + } + } + // *NOTE* NEED TO TEST WHEN SUPERCLASS IS IN ANOTHER UCL!!!!!! + return clazz; + } + + /** + * Cache a class + * + * @param classname + * the class name + * @param c + * the ctClass + * @param dynamic + * whether the class is dynamically generated + */ + protected void cacheCtClass(String classname, CtClass c, boolean dynamic) { + if (dynamic) { + super.cacheCtClass(classname, c, dynamic); + } + else { + if (repository.isPrune()) + c.prune(); + softcache.put(classname, c); + } + } + + /** + * Lock a class into the cache + * + * @param c + * the class + */ + public void lockInCache(CtClass c) { + super.cacheCtClass(c.getName(), c, false); + } + + /** + * Whether the class is cached in this pooled + * + * @param classname + * the class name + * @return the cached class + */ + protected CtClass getCachedLocally(String classname) { + CtClass cached = (CtClass)classes.get(classname); + if (cached != null) + return cached; + synchronized (softcache) { + return (CtClass)softcache.get(classname); + } + } + + /** + * Get any local copy of the class + * + * @param classname + * the class name + * @return the class + * @throws NotFoundException + * when the class is not found + */ + public synchronized CtClass getLocally(String classname) + throws NotFoundException { + softcache.remove(classname); + CtClass clazz = (CtClass)classes.get(classname); + if (clazz == null) { + clazz = createCtClass(classname, true); + if (clazz == null) + throw new NotFoundException(classname); + super.cacheCtClass(classname, clazz, false); + } + + return clazz; + } + + /** + * Convert a javassist class to a java class + * + * @param ct + * the javassist class + * @param loader + * the loader + * @throws CannotCompileException + * for any error + */ + public Class toClass(CtClass ct, ClassLoader loader, ProtectionDomain domain) + throws CannotCompileException { + // We need to pass up the classloader stored in this pool, as the + // default implementation uses the Thread context cl. + // In the case of JSP's in Tomcat, + // org.apache.jasper.servlet.JasperLoader will be stored here, while + // it's parent + // org.jboss.web.tomcat.tc5.WebCtxLoader$ENCLoader is used as the Thread + // context cl. The invocation class needs to + // be generated in the JasperLoader classloader since in the case of + // method invocations, the package name will be + // the same as for the class generated from the jsp, i.e. + // org.apache.jsp. For classes belonging to org.apache.jsp, + // JasperLoader does NOT delegate to its parent if it cannot find them. + lockInCache(ct); + return super.toClass(ct, getClassLoader0(), domain); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java new file mode 100644 index 0000000..2dd05b4 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java @@ -0,0 +1,39 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import com.wenshuo.agent.javassist.ClassPool; + +/** + * A factory interface. + * + * @author Kabir Khan + * @version $Revision: 1.4 $ + */ +public interface ScopedClassPoolFactory { + /** + * Makes an instance. + */ + ScopedClassPool create(ClassLoader cl, ClassPool src, + ScopedClassPoolRepository repository); + + /** + * Makes an instance. + */ + ScopedClassPool create(ClassPool src, + ScopedClassPoolRepository repository); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java new file mode 100644 index 0000000..1386fff --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java @@ -0,0 +1,43 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import com.wenshuo.agent.javassist.ClassPool; + +/** + * An implementation of factory. + * + * @author Kabir Khan + * @version $Revision: 1.5 $ + */ +public class ScopedClassPoolFactoryImpl implements ScopedClassPoolFactory { + /** + * Makes an instance. + */ + public ScopedClassPool create(ClassLoader cl, ClassPool src, + ScopedClassPoolRepository repository) { + return new ScopedClassPool(cl, src, repository, false); + } + + /** + * Makes an instance. + */ + public ScopedClassPool create(ClassPool src, + ScopedClassPoolRepository repository) { + return new ScopedClassPool(null, src, repository, true); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java new file mode 100644 index 0000000..4965cff --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java @@ -0,0 +1,98 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import java.util.Map; + +import com.wenshuo.agent.javassist.ClassPool; + +/** + * An interface to ScopedClassPoolRepositoryImpl. + * + * @author Kabir Khan + * @version $Revision: 1.4 $ + */ +public interface ScopedClassPoolRepository { + /** + * Records a factory. + */ + void setClassPoolFactory(ScopedClassPoolFactory factory); + + /** + * Obtains the recorded factory. + */ + ScopedClassPoolFactory getClassPoolFactory(); + + /** + * Returns whether or not the class pool is pruned. + * + * @return the prune. + */ + boolean isPrune(); + + /** + * Sets the prune flag. + * + * @param prune a new value. + */ + void setPrune(boolean prune); + + /** + * Create a scoped classpool. + * + * @param cl the classloader. + * @param src the original classpool. + * @return the classpool. + */ + ScopedClassPool createScopedClassPool(ClassLoader cl, ClassPool src); + + /** + * Finds a scoped classpool registered under the passed in classloader. + * + * @param cl the classloader. + * @return the classpool. + */ + ClassPool findClassPool(ClassLoader cl); + + /** + * Register a classloader. + * + * @param ucl the classloader. + * @return the classpool. + */ + ClassPool registerClassLoader(ClassLoader ucl); + + /** + * Get the registered classloaders. + * + * @return the registered classloaders. + */ + Map getRegisteredCLs(); + + /** + * This method will check to see if a register classloader has been + * undeployed (as in JBoss). + */ + void clearUnregisteredClassLoaders(); + + /** + * Unregisters a classpool and unregisters its classloader. + * + * @param cl the classloader the pool is stored under. + */ + void unregisterClassLoader(ClassLoader cl); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java new file mode 100644 index 0000000..3f0e5ae --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java @@ -0,0 +1,188 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.Iterator; +import java.util.Map; +import java.util.WeakHashMap; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.LoaderClassPath; + +/** + * An implementation of ScopedClassPoolRepository. + * It is an singleton. + * + * @author Kabir Khan + * @version $Revision: 1.4 $ + */ +public class ScopedClassPoolRepositoryImpl implements ScopedClassPoolRepository { + /** The instance */ + private static final ScopedClassPoolRepositoryImpl instance = new ScopedClassPoolRepositoryImpl(); + + /** Whether to prune */ + private boolean prune = true; + + /** Whether to prune when added to the classpool's cache */ + boolean pruneWhenCached; + + /** The registered classloaders */ + protected Map registeredCLs = Collections + .synchronizedMap(new WeakHashMap()); + + /** The default class pool */ + protected ClassPool classpool; + + /** The factory for creating class pools */ + protected ScopedClassPoolFactory factory = new ScopedClassPoolFactoryImpl(); + + /** + * Get the instance. + * + * @return the instance. + */ + public static ScopedClassPoolRepository getInstance() { + return instance; + } + + /** + * Singleton. + */ + private ScopedClassPoolRepositoryImpl() { + classpool = ClassPool.getDefault(); + // FIXME This doesn't look correct + ClassLoader cl = Thread.currentThread().getContextClassLoader(); + classpool.insertClassPath(new LoaderClassPath(cl)); + } + + /** + * Returns the value of the prune attribute. + * + * @return the prune. + */ + public boolean isPrune() { + return prune; + } + + /** + * Set the prune attribute. + * + * @param prune a new value. + */ + public void setPrune(boolean prune) { + this.prune = prune; + } + + /** + * Create a scoped classpool. + * + * @param cl the classloader. + * @param src the original classpool. + * @return the classpool + */ + public ScopedClassPool createScopedClassPool(ClassLoader cl, ClassPool src) { + return factory.create(cl, src, this); + } + + public ClassPool findClassPool(ClassLoader cl) { + if (cl == null) + return registerClassLoader(ClassLoader.getSystemClassLoader()); + + return registerClassLoader(cl); + } + + /** + * Register a classloader. + * + * @param ucl the classloader. + * @return the classpool + */ + public ClassPool registerClassLoader(ClassLoader ucl) { + synchronized (registeredCLs) { + // FIXME: Probably want to take this method out later + // so that AOP framework can be independent of JMX + // This is in here so that we can remove a UCL from the ClassPool as + // a + // ClassPool.classpath + if (registeredCLs.containsKey(ucl)) { + return (ClassPool)registeredCLs.get(ucl); + } + ScopedClassPool pool = createScopedClassPool(ucl, classpool); + registeredCLs.put(ucl, pool); + return pool; + } + } + + /** + * Get the registered classloaders. + */ + public Map getRegisteredCLs() { + clearUnregisteredClassLoaders(); + return registeredCLs; + } + + /** + * This method will check to see if a register classloader has been + * undeployed (as in JBoss) + */ + public void clearUnregisteredClassLoaders() { + ArrayList toUnregister = null; + synchronized (registeredCLs) { + Iterator it = registeredCLs.values().iterator(); + while (it.hasNext()) { + ScopedClassPool pool = (ScopedClassPool)it.next(); + if (pool.isUnloadedClassLoader()) { + it.remove(); + ClassLoader cl = pool.getClassLoader(); + if (cl != null) { + if (toUnregister == null) { + toUnregister = new ArrayList(); + } + toUnregister.add(cl); + } + } + } + if (toUnregister != null) { + for (int i = 0; i < toUnregister.size(); i++) { + unregisterClassLoader((ClassLoader)toUnregister.get(i)); + } + } + } + } + + public void unregisterClassLoader(ClassLoader cl) { + synchronized (registeredCLs) { + ScopedClassPool pool = (ScopedClassPool)registeredCLs.remove(cl); + if (pool != null) + pool.close(); + } + } + + public void insertDelegate(ScopedClassPoolRepository delegate) { + // Noop - this is the end + } + + public void setClassPoolFactory(ScopedClassPoolFactory factory) { + this.factory = factory; + } + + public ScopedClassPoolFactory getClassPoolFactory() { + return factory; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java b/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java new file mode 100644 index 0000000..3743ca6 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java @@ -0,0 +1,233 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.scopedpool; + +import java.lang.ref.ReferenceQueue; +import java.lang.ref.SoftReference; +import java.util.AbstractMap; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; + +/** + * This Map will remove entries when the value in the map has been cleaned from + * garbage collection + * + * @version $Revision: 1.4 $ + * @author Bill Burke + */ +public class SoftValueHashMap extends AbstractMap implements Map { + private static class SoftValueRef extends SoftReference { + public Object key; + + private SoftValueRef(Object key, Object val, ReferenceQueue q) { + super(val, q); + this.key = key; + } + + private static SoftValueRef create(Object key, Object val, + ReferenceQueue q) { + if (val == null) + return null; + else + return new SoftValueRef(key, val, q); + } + + } + + /** + * Returns a set of the mappings contained in this hash table. + */ + public Set entrySet() { + processQueue(); + return hash.entrySet(); + } + + /* Hash table mapping WeakKeys to values */ + private Map hash; + + /* Reference queue for cleared WeakKeys */ + private ReferenceQueue queue = new ReferenceQueue(); + + /* + * Remove all invalidated entries from the map, that is, remove all entries + * whose values have been discarded. + */ + private void processQueue() { + SoftValueRef ref; + while ((ref = (SoftValueRef)queue.poll()) != null) { + if (ref == (SoftValueRef)hash.get(ref.key)) { + // only remove if it is the *exact* same WeakValueRef + // + hash.remove(ref.key); + } + } + } + + /* -- Constructors -- */ + + /** + * Constructs a new, empty WeakHashMap with the given initial + * capacity and the given load factor. + * + * @param initialCapacity + * The initial capacity of the WeakHashMap + * + * @param loadFactor + * The load factor of the WeakHashMap + * + * @throws IllegalArgumentException + * If the initial capacity is less than zero, or if the load + * factor is nonpositive + */ + public SoftValueHashMap(int initialCapacity, float loadFactor) { + hash = new HashMap(initialCapacity, loadFactor); + } + + /** + * Constructs a new, empty WeakHashMap with the given initial + * capacity and the default load factor, which is 0.75. + * + * @param initialCapacity + * The initial capacity of the WeakHashMap + * + * @throws IllegalArgumentException + * If the initial capacity is less than zero + */ + public SoftValueHashMap(int initialCapacity) { + hash = new HashMap(initialCapacity); + } + + /** + * Constructs a new, empty WeakHashMap with the default + * initial capacity and the default load factor, which is 0.75. + */ + public SoftValueHashMap() { + hash = new HashMap(); + } + + /** + * Constructs a new WeakHashMap with the same mappings as the + * specified Map. The WeakHashMap is created with + * an initial capacity of twice the number of mappings in the specified map + * or 11 (whichever is greater), and a default load factor, which is + * 0.75. + * + * @param t the map whose mappings are to be placed in this map. + */ + public SoftValueHashMap(Map t) { + this(Math.max(2 * t.size(), 11), 0.75f); + putAll(t); + } + + /* -- Simple queries -- */ + + /** + * Returns the number of key-value mappings in this map. Note: + * In contrast with most implementations of the + * Map interface, the time required by this operation is + * linear in the size of the map. + */ + public int size() { + processQueue(); + return hash.size(); + } + + /** + * Returns true if this map contains no key-value mappings. + */ + public boolean isEmpty() { + processQueue(); + return hash.isEmpty(); + } + + /** + * Returns true if this map contains a mapping for the + * specified key. + * + * @param key + * The key whose presence in this map is to be tested. + */ + public boolean containsKey(Object key) { + processQueue(); + return hash.containsKey(key); + } + + /* -- Lookup and modification operations -- */ + + /** + * Returns the value to which this map maps the specified key. + * If this map does not contain a value for this key, then return + * null. + * + * @param key + * The key whose associated value, if any, is to be returned. + */ + public Object get(Object key) { + processQueue(); + SoftReference ref = (SoftReference)hash.get(key); + if (ref != null) + return ref.get(); + return null; + } + + /** + * Updates this map so that the given key maps to the given + * value. If the map previously contained a mapping for + * key then that mapping is replaced and the previous value + * is returned. + * + * @param key + * The key that is to be mapped to the given value + * @param value + * The value to which the given key is to be + * mapped + * + * @return The previous value to which this key was mapped, or + * null if if there was no mapping for the key + */ + public Object put(Object key, Object value) { + processQueue(); + Object rtn = hash.put(key, SoftValueRef.create(key, value, queue)); + if (rtn != null) + rtn = ((SoftReference)rtn).get(); + return rtn; + } + + /** + * Removes the mapping for the given key from this map, if + * present. + * + * @param key + * The key whose mapping is to be removed. + * + * @return The value to which this key was mapped, or null if + * there was no mapping for the key. + */ + public Object remove(Object key) { + processQueue(); + return hash.remove(key); + } + + /** + * Removes all mappings from this map. + */ + public void clear() { + processQueue(); + hash.clear(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html b/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html new file mode 100644 index 0000000..946e5e1 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html @@ -0,0 +1,7 @@ + + +

A custom class pool for several JBoss products. +It is not part of Javassist. +

+ + diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java b/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java new file mode 100644 index 0000000..56ba4fb --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java @@ -0,0 +1,152 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.CtBehavior; + +import java.util.HashMap; +import java.util.UUID; + +/** + * Creates bytecode that when executed calls back to the instance's result method. + * + *

Example of how to create and insert a callback:

+ * 
+ * ctMethod.insertAfter(new Callback("Thread.currentThread()") {
+ *     public void result(Object... objects) {
+ *         Thread thread = (Thread) objects[0];
+ *         // do something with thread...
+ *     }
+ * }.sourceCode());
+ *
+ *

Contains utility methods for inserts callbacks in CtBehaviour, example:

+ * 
+ * insertAfter(ctBehaviour, new Callback("Thread.currentThread(), dummyString") {
+ *     public void result(Object... objects) {
+ *         Thread thread = (Thread) objects[0];
+ *         // do something with thread...
+ *     }
+ * });
+ *
+ * + * @author Marten Hedborg + */ +public abstract class Callback { + + public static HashMap callbacks = new HashMap(); + + private final String sourceCode; + + /** + * Constructs a new Callback object. + * + * @param src The source code representing the inserted callback bytecode. + * Can be one or many single statements each returning one object. + * If many single statements are used they must be comma separated. + */ + public Callback(String src){ + String uuid = UUID.randomUUID().toString(); + callbacks.put(uuid, this); + sourceCode = "((javassist.tools.Callback) javassist.tools.Callback.callbacks.get(\""+uuid+"\")).result(new Object[]{"+src+"});"; + } + + /** + * Gets called when bytecode is executed + * + * @param objects Objects that the bytecode in callback returns + */ + public abstract void result(Object... objects); + + @Override + public String toString(){ + return sourceCode(); + } + + public String sourceCode(){ + return sourceCode; + } + + /** + * Utility method to insert callback at the beginning of the body. + * + * @param callback The callback + * + * @see CtBehavior#insertBefore(String) + */ + public static void insertBefore(CtBehavior behavior, Callback callback) + throws CannotCompileException + { + behavior.insertBefore(callback.toString()); + } + + /** + * Utility method to inserts callback at the end of the body. + * The callback is inserted just before every return instruction. + * It is not executed when an exception is thrown. + * + * @param behavior The behaviour to insert callback in + * @param callback The callback + * + * @see CtBehavior#insertAfter(String, boolean) + */ + public static void insertAfter(CtBehavior behavior,Callback callback) + throws CannotCompileException + { + behavior.insertAfter(callback.toString(), false); + } + + /** + * Utility method to inserts callback at the end of the body. + * The callback is inserted just before every return instruction. + * It is not executed when an exception is thrown. + * + * @param behavior The behaviour to insert callback in + * @param callback The callback representing the inserted. + * @param asFinally True if the inserted is executed + * Not only when the control normally returns + * but also when an exception is thrown. + * If this parameter is true, the inserted code cannot + * access local variables. + * + * @see CtBehavior#insertAfter(String, boolean) + */ + public static void insertAfter(CtBehavior behavior, Callback callback, boolean asFinally) + throws CannotCompileException + { + behavior.insertAfter(callback.toString(), asFinally); + } + + /** + * Utility method to inserts callback at the specified line in the body. + * + * @param behavior The behaviour to insert callback in + * @param callback The callback representing. + * @param lineNum The line number. The callback is inserted at the + * beginning of the code at the line specified by this + * line number. + * + * @return The line number at which the callback has been inserted. + * + * @see CtBehavior#insertAt(int, String) + */ + public static int insertAt(CtBehavior behavior, Callback callback, int lineNum) + throws CannotCompileException + { + return behavior.insertAt(lineNum, callback.toString()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java b/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java new file mode 100644 index 0000000..8a504ee --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java @@ -0,0 +1,58 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools; + +import java.io.*; +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.ClassFilePrinter; + +/** + * Dump is a tool for viewing the class definition in the given + * class file. Unlike the JDK javap tool, Dump works even if + * the class file is broken. + * + *

For example, + * 

% java javassist.tools.Dump foo.class
+ * + *

prints the contents of the constant pool and the list of methods + * and fields. + */ +public class Dump { + private Dump() {} + + /** + * Main method. + * + * @param args args[0] is the class file name. + */ + public static void main(String[] args) throws Exception { + if (args.length != 1) { + System.err.println("Usage: java Dump "); + return; + } + + DataInputStream in = new DataInputStream( + new FileInputStream(args[0])); + ClassFile w = new ClassFile(in); + PrintWriter out = new PrintWriter(System.out, true); + out.println("*** constant pool ***"); + w.getConstPool().print(out); + out.println(); + out.println("*** members ***"); + ClassFilePrinter.print(w, out); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java b/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java new file mode 100644 index 0000000..623ffc3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java @@ -0,0 +1,48 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.tools; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.bytecode.analysis.FramePrinter; + +/** + * framedump is a tool for viewing a merged combination of the instructions and frame state + * of all methods in a class. + * + *

For example, + * 

% java javassist.tools.framedump foo.class
+ */ +public class framedump { + private framedump() {} + + /** + * Main method. + * + * @param args args[0] is the class file name. + */ + public static void main(String[] args) throws Exception { + if (args.length != 1) { + System.err.println("Usage: java javassist.tools.framedump "); + return; + } + + ClassPool pool = ClassPool.getDefault(); + CtClass clazz = pool.get(args[0]); + System.out.println("Frame Dump of " + clazz.getName() + ":"); + FramePrinter.print(clazz, System.out); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/package.html b/src/main/java/com/wenshuo/agent/javassist/tools/package.html new file mode 100644 index 0000000..bee6208 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/package.html @@ -0,0 +1,6 @@ + + +Covenient tools. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java new file mode 100644 index 0000000..de3c782 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java @@ -0,0 +1,30 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +/** + * Signals that ClassMetaobject.newInstance() fails. + */ +public class CannotCreateException extends Exception { + public CannotCreateException(String s) { + super(s); + } + + public CannotCreateException(Exception e) { + super("by " + e.toString()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java new file mode 100644 index 0000000..7907022 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java @@ -0,0 +1,69 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import java.lang.reflect.InvocationTargetException; +import java.lang.IllegalAccessException; + +/** + * Thrown when method invocation using the reflection API has thrown + * an exception. + * + * @see javassist.tools.reflect.Metaobject#trapMethodcall(int, Object[]) + * @see javassist.tools.reflect.ClassMetaobject#trapMethodcall(int, Object[]) + * @see javassist.tools.reflect.ClassMetaobject#invoke(Object, int, Object[]) + */ +public class CannotInvokeException extends RuntimeException { + + private Throwable err = null; + + /** + * Returns the cause of this exception. It may return null. + */ + public Throwable getReason() { return err; } + + /** + * Constructs a CannotInvokeException with an error message. + */ + public CannotInvokeException(String reason) { + super(reason); + } + + /** + * Constructs a CannotInvokeException with an InvocationTargetException. + */ + public CannotInvokeException(InvocationTargetException e) { + super("by " + e.getTargetException().toString()); + err = e.getTargetException(); + } + + /** + * Constructs a CannotInvokeException with an IllegalAccessException. + */ + public CannotInvokeException(IllegalAccessException e) { + super("by " + e.toString()); + err = e; + } + + /** + * Constructs a CannotInvokeException with an ClassNotFoundException. + */ + public CannotInvokeException(ClassNotFoundException e) { + super("by " + e.toString()); + err = e; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java new file mode 100644 index 0000000..f2673c9 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java @@ -0,0 +1,35 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import com.wenshuo.agent.javassist.CannotCompileException; + +/** + * Thrown by makeReflective() in Reflection + * when there is an attempt to reflect + * a class that is either an interface or a subclass of + * either ClassMetaobject or Metaobject. + * + * @author Brett Randall + * @see javassist.tools.reflect.Reflection#makeReflective(CtClass,CtClass,CtClass) + * @see javassist.CannotCompileException + */ +public class CannotReflectException extends CannotCompileException { + public CannotReflectException(String msg) { + super(msg); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java new file mode 100644 index 0000000..78fb42f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java @@ -0,0 +1,370 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import java.lang.reflect.*; +import java.util.Arrays; +import java.io.Serializable; +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; + +/** + * A runtime class metaobject. + * + *

A ClassMetaobject is created for every + * class of reflective objects. It can be used to hold values + * shared among the reflective objects of the same class. + * + *

To obtain a class metaobject, calls _getClass() + * on a reflective object. For example, + * + * 

ClassMetaobject cm = ((Metalevel)reflectiveObject)._getClass();
+ *
+ * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.Metalevel + */ +public class ClassMetaobject implements Serializable { + /** + * The base-level methods controlled by a metaobject + * are renamed so that they begin with + * methodPrefix "_m_". + */ + static final String methodPrefix = "_m_"; + static final int methodPrefixLen = 3; + + private Class javaClass; + private Constructor[] constructors; + private Method[] methods; + + /** + * Specifies how a java.lang.Class object is loaded. + * + *

If true, it is loaded by: + * 

Thread.currentThread().getContextClassLoader().loadClass()
+ *

If false, it is loaded by Class.forName(). + * The default value is false. + */ + public static boolean useContextClassLoader = false; + + /** + * Constructs a ClassMetaobject. + * + * @param params params[0] is the name of the class + * of the reflective objects. + */ + public ClassMetaobject(String[] params) + { + try { + javaClass = getClassObject(params[0]); + } + catch (ClassNotFoundException e) { + throw new RuntimeException("not found: " + params[0] + + ", useContextClassLoader: " + + Boolean.toString(useContextClassLoader), e); + } + + constructors = javaClass.getConstructors(); + methods = null; + } + + private void writeObject(ObjectOutputStream out) throws IOException { + out.writeUTF(javaClass.getName()); + } + + private void readObject(ObjectInputStream in) + throws IOException, ClassNotFoundException + { + javaClass = getClassObject(in.readUTF()); + constructors = javaClass.getConstructors(); + methods = null; + } + + private Class getClassObject(String name) throws ClassNotFoundException { + if (useContextClassLoader) + return Thread.currentThread().getContextClassLoader() + .loadClass(name); + else + return Class.forName(name); + } + + /** + * Obtains the java.lang.Class representing this class. + */ + public final Class getJavaClass() { + return javaClass; + } + + /** + * Obtains the name of this class. + */ + public final String getName() { + return javaClass.getName(); + } + + /** + * Returns true if obj is an instance of this class. + */ + public final boolean isInstance(Object obj) { + return javaClass.isInstance(obj); + } + + /** + * Creates a new instance of the class. + * + * @param args the arguments passed to the constructor. + */ + public final Object newInstance(Object[] args) + throws CannotCreateException + { + int n = constructors.length; + for (int i = 0; i < n; ++i) { + try { + return constructors[i].newInstance(args); + } + catch (IllegalArgumentException e) { + // try again + } + catch (InstantiationException e) { + throw new CannotCreateException(e); + } + catch (IllegalAccessException e) { + throw new CannotCreateException(e); + } + catch (InvocationTargetException e) { + throw new CannotCreateException(e); + } + } + + throw new CannotCreateException("no constructor matches"); + } + + /** + * Is invoked when static fields of the base-level + * class are read and the runtime system intercepts it. + * This method simply returns the value of the field. + * + *

Every subclass of this class should redefine this method. + */ + public Object trapFieldRead(String name) { + Class jc = getJavaClass(); + try { + return jc.getField(name).get(null); + } + catch (NoSuchFieldException e) { + throw new RuntimeException(e.toString()); + } + catch (IllegalAccessException e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Is invoked when static fields of the base-level + * class are modified and the runtime system intercepts it. + * This method simply sets the field to the given value. + * + *

Every subclass of this class should redefine this method. + */ + public void trapFieldWrite(String name, Object value) { + Class jc = getJavaClass(); + try { + jc.getField(name).set(null, value); + } + catch (NoSuchFieldException e) { + throw new RuntimeException(e.toString()); + } + catch (IllegalAccessException e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Invokes a method whose name begins with + * methodPrefix "_m_" and the identifier. + * + * @exception CannotInvokeException if the invocation fails. + */ + static public Object invoke(Object target, int identifier, Object[] args) + throws Throwable + { + Method[] allmethods = target.getClass().getMethods(); + int n = allmethods.length; + String head = methodPrefix + identifier; + for (int i = 0; i < n; ++i) + if (allmethods[i].getName().startsWith(head)) { + try { + return allmethods[i].invoke(target, args); + } catch (java.lang.reflect.InvocationTargetException e) { + throw e.getTargetException(); + } catch (java.lang.IllegalAccessException e) { + throw new CannotInvokeException(e); + } + } + + throw new CannotInvokeException("cannot find a method"); + } + + /** + * Is invoked when static methods of the base-level + * class are called and the runtime system intercepts it. + * This method simply executes the intercepted method invocation + * with the original parameters and returns the resulting value. + * + *

Every subclass of this class should redefine this method. + */ + public Object trapMethodcall(int identifier, Object[] args) + throws Throwable + { + try { + Method[] m = getReflectiveMethods(); + return m[identifier].invoke(null, args); + } + catch (java.lang.reflect.InvocationTargetException e) { + throw e.getTargetException(); + } + catch (java.lang.IllegalAccessException e) { + throw new CannotInvokeException(e); + } + } + + /** + * Returns an array of the methods defined on the given reflective + * object. This method is for the internal use only. + */ + public final Method[] getReflectiveMethods() { + if (methods != null) + return methods; + + Class baseclass = getJavaClass(); + Method[] allmethods = baseclass.getDeclaredMethods(); + int n = allmethods.length; + int[] index = new int[n]; + int max = 0; + for (int i = 0; i < n; ++i) { + Method m = allmethods[i]; + String mname = m.getName(); + if (mname.startsWith(methodPrefix)) { + int k = 0; + for (int j = methodPrefixLen;; ++j) { + char c = mname.charAt(j); + if ('0' <= c && c <= '9') + k = k * 10 + c - '0'; + else + break; + } + + index[i] = ++k; + if (k > max) + max = k; + } + } + + methods = new Method[max]; + for (int i = 0; i < n; ++i) + if (index[i] > 0) + methods[index[i] - 1] = allmethods[i]; + + return methods; + } + + /** + * Returns the java.lang.reflect.Method object representing + * the method specified by identifier. + * + *

Note that the actual method returned will be have an altered, + * reflective name i.e. _m_2_... + * + * @param identifier the identifier index + * given to trapMethodcall() etc. + * @see Metaobject#trapMethodcall(int,Object[]) + * @see #trapMethodcall(int,Object[]) + */ + public final Method getMethod(int identifier) { + return getReflectiveMethods()[identifier]; + } + + /** + * Returns the name of the method specified + * by identifier. + */ + public final String getMethodName(int identifier) { + String mname = getReflectiveMethods()[identifier].getName(); + int j = ClassMetaobject.methodPrefixLen; + for (;;) { + char c = mname.charAt(j++); + if (c < '0' || '9' < c) + break; + } + + return mname.substring(j); + } + + /** + * Returns an array of Class objects representing the + * formal parameter types of the method specified + * by identifier. + */ + public final Class[] getParameterTypes(int identifier) { + return getReflectiveMethods()[identifier].getParameterTypes(); + } + + /** + * Returns a Class objects representing the + * return type of the method specified by identifier. + */ + public final Class getReturnType(int identifier) { + return getReflectiveMethods()[identifier].getReturnType(); + } + + /** + * Returns the identifier index of the method, as identified by its + * original name. + * + *

This method is useful, in conjuction with + * {@link ClassMetaobject#getMethod(int)}, to obtain a quick reference + * to the original method in the reflected class (i.e. not the proxy + * method), using the original name of the method. + * + *

Written by Brett Randall and Shigeru Chiba. + * + * @param originalName The original name of the reflected method + * @param argTypes array of Class specifying the method signature + * @return the identifier index of the original method + * @throws NoSuchMethodException if the method does not exist + * + * @see ClassMetaobject#getMethod(int) + */ + public final int getMethodIndex(String originalName, Class[] argTypes) + throws NoSuchMethodException + { + Method[] mthds = getReflectiveMethods(); + for (int i = 0; i < mthds.length; i++) { + if (mthds[i] == null) + continue; + + // check name and parameter types match + if (getMethodName(i).equals(originalName) + && Arrays.equals(argTypes, mthds[i].getParameterTypes())) + return i; + } + + throw new NoSuchMethodException("Method " + originalName + + " not found"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java new file mode 100644 index 0000000..0953163 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java @@ -0,0 +1,163 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.ClassPool; +import java.io.PrintStream; + +class CompiledClass { + public String classname; + public String metaobject; + public String classobject; +} + +/** + * A bytecode translator for reflection. + * + *

This translator directly modifies class files on a local disk so that + * the classes represented by those class files are reflective. + * After the modification, the class files can be run with the standard JVM + * without javassist.tools.reflect.Loader + * or any other user-defined class loader. + * + *

The modified class files are given as the command-line parameters, + * which are a sequence of fully-qualified class names followed by options: + * + *

-m classname : specifies the class of the + * metaobjects associated with instances of the class followed by + * this option. The default is javassit.reflect.Metaobject. + * + *

-c classname : specifies the class of the + * class metaobjects associated with instances of the class followed by + * this option. The default is javassit.reflect.ClassMetaobject. + * + *

If a class name is not followed by any options, the class indicated + * by that class name is not reflective. + * + *

For example, + * 

% java Compiler Dog -m MetaDog -c CMetaDog Cat -m MetaCat Cow
+ *
+ * + *

modifies class files Dog.class, Cat.class, + * and Cow.class. + * The metaobject of a Dog object is a MetaDog object and the class + * metaobject is a CMetaDog object. + * The metaobject of a Cat object is a MetaCat object but + * the class metaobject is a default one. + * Cow objects are not reflective. + * + *

Note that if the super class is also made reflective, it must be done + * before the sub class. + * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.ClassMetaobject + * @see javassist.tools.reflect.Reflection + */ +public class Compiler { + + public static void main(String[] args) throws Exception { + if (args.length == 0) { + help(System.err); + return; + } + + CompiledClass[] entries = new CompiledClass[args.length]; + int n = parse(args, entries); + + if (n < 1) { + System.err.println("bad parameter."); + return; + } + + processClasses(entries, n); + } + + private static void processClasses(CompiledClass[] entries, int n) + throws Exception + { + Reflection implementor = new Reflection(); + ClassPool pool = ClassPool.getDefault(); + implementor.start(pool); + + for (int i = 0; i < n; ++i) { + CtClass c = pool.get(entries[i].classname); + if (entries[i].metaobject != null + || entries[i].classobject != null) { + String metaobj, classobj; + + if (entries[i].metaobject == null) + metaobj = "javassist.tools.reflect.Metaobject"; + else + metaobj = entries[i].metaobject; + + if (entries[i].classobject == null) + classobj = "javassist.tools.reflect.ClassMetaobject"; + else + classobj = entries[i].classobject; + + if (!implementor.makeReflective(c, pool.get(metaobj), + pool.get(classobj))) + System.err.println("Warning: " + c.getName() + + " is reflective. It was not changed."); + + System.err.println(c.getName() + ": " + metaobj + ", " + + classobj); + } + else + System.err.println(c.getName() + ": not reflective"); + } + + for (int i = 0; i < n; ++i) { + implementor.onLoad(pool, entries[i].classname); + pool.get(entries[i].classname).writeFile(); + } + } + + private static int parse(String[] args, CompiledClass[] result) { + int n = -1; + for (int i = 0; i < args.length; ++i) { + String a = args[i]; + if (a.equals("-m")) + if (n < 0 || i + 1 > args.length) + return -1; + else + result[n].metaobject = args[++i]; + else if (a.equals("-c")) + if (n < 0 || i + 1 > args.length) + return -1; + else + result[n].classobject = args[++i]; + else if (a.charAt(0) == '-') + return -1; + else { + CompiledClass cc = new CompiledClass(); + cc.classname = a; + cc.metaobject = null; + cc.classobject = null; + result[++n] = cc; + } + } + + return n + 1; + } + + private static void help(PrintStream out) { + out.println("Usage: java javassist.tools.reflect.Compiler"); + out.println(" ( [-m ] [-c ])+"); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java new file mode 100644 index 0000000..4b9d1e3 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java @@ -0,0 +1,162 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.ClassPool; + +/** + * A class loader for reflection. + * + *

To run a program, say MyApp, + * including a reflective class, + * you must write a start-up program as follows: + * + * 

+ * public class Main {
+ *   public static void main(String[] args) throws Throwable {
+ *     javassist.tools.reflect.Loader cl
+ *         = (javassist.tools.reflect.Loader)Main.class.getClassLoader();
+ *     cl.makeReflective("Person", "MyMetaobject",
+ *                       "javassist.tools.reflect.ClassMetaobject");
+ *     cl.run("MyApp", args);
+ *   }
+ * }
+ *
+ * + *

Then run this program as follows: + * + * 

% java javassist.tools.reflect.Loader Main arg1, ...
+ * + *

This command runs Main.main() with arg1, ... + * and Main.main() runs MyApp.main() with + * arg1, ... + * The Person class is modified + * to be a reflective class. Method calls on a Person + * object are intercepted by an instance of MyMetaobject. + * + *

Also, you can run MyApp in a slightly different way: + * + * 

+ * public class Main2 {
+ *   public static void main(String[] args) throws Throwable {
+ *     javassist.tools.reflect.Loader cl = new javassist.tools.reflect.Loader();
+ *     cl.makeReflective("Person", "MyMetaobject",
+ *                       "javassist.tools.reflect.ClassMetaobject");
+ *     cl.run("MyApp", args);
+ *   }
+ * }
+ *
+ * + *

This program is run as follows: + * + * 

% java Main2 arg1, ...
+ * + *

The difference from the former one is that the class Main + * is loaded by javassist.tools.reflect.Loader whereas the class + * Main2 is not. Thus, Main belongs + * to the same name space (security domain) as MyApp + * whereas Main2 does not; Main2 belongs + * to the same name space as javassist.tools.reflect.Loader. + * For more details, + * see the notes in the manual page of javassist.Loader. + * + *

The class Main2 is equivalent to this class: + * + * 

+ * public class Main3 {
+ *   public static void main(String[] args) throws Throwable {
+ *     Reflection reflection = new Reflection();
+ *     javassist.Loader cl
+ *         = new javassist.Loader(ClassPool.getDefault(reflection));
+ *     reflection.makeReflective("Person", "MyMetaobject",
+ *                               "javassist.tools.reflect.ClassMetaobject");
+ *     cl.run("MyApp", args);
+ *   }
+ * }
+ *
+ * + *

Note: + * + *

javassist.tools.reflect.Loader does not make a class reflective + * if that class is in a java.* or + * javax.* pacakge because of the specifications + * on the class loading algorithm of Java. The JVM does not allow to + * load such a system class with a user class loader. + * + *

To avoid this limitation, those classes should be statically + * modified with javassist.tools.reflect.Compiler and the original + * class files should be replaced. + * + * @see javassist.tools.reflect.Reflection + * @see javassist.tools.reflect.Compiler + * @see javassist.Loader + */ +public class Loader extends com.wenshuo.agent.javassist.Loader { + protected Reflection reflection; + + /** + * Loads a class with an instance of Loader + * and calls main() in that class. + * + * @param args command line parameters. + *
  args[0] is the class name to be loaded. + *
  args[1..n] are parameters passed + * to the target main(). + */ + public static void main(String[] args) throws Throwable { + Loader cl = new Loader(); + cl.run(args); + } + + /** + * Constructs a new class loader. + */ + public Loader() throws CannotCompileException, NotFoundException { + super(); + delegateLoadingOf("javassist.tools.reflect.Loader"); + + reflection = new Reflection(); + ClassPool pool = ClassPool.getDefault(); + addTranslator(pool, reflection); + } + + /** + * Produces a reflective class. + * If the super class is also made reflective, it must be done + * before the sub class. + * + * @param clazz the reflective class. + * @param metaobject the class of metaobjects. + * It must be a subclass of + * Metaobject. + * @param metaclass the class of the class metaobject. + * It must be a subclass of + * ClassMetaobject. + * @return false if the class is already reflective. + * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.ClassMetaobject + */ + public boolean makeReflective(String clazz, + String metaobject, String metaclass) + throws CannotCompileException, NotFoundException + { + return reflection.makeReflective(clazz, metaobject, metaclass); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java new file mode 100644 index 0000000..d8c1f4a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java @@ -0,0 +1,39 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +/** + * An interface to access a metaobject and a class metaobject. + * This interface is implicitly implemented by the reflective + * class. + */ +public interface Metalevel { + /** + * Obtains the class metaobject associated with this object. + */ + ClassMetaobject _getClass(); + + /** + * Obtains the metaobject associated with this object. + */ + Metaobject _getMetaobject(); + + /** + * Changes the metaobject associated with this object. + */ + void _setMetaobject(Metaobject m); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java new file mode 100644 index 0000000..f96444e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java @@ -0,0 +1,239 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import java.lang.reflect.Method; +import java.io.Serializable; +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; + +/** + * A runtime metaobject. + * + *

A Metaobject is created for + * every object at the base level. A different reflective object is + * associated with a different metaobject. + * + *

The metaobject intercepts method calls + * on the reflective object at the base-level. To change the behavior + * of the method calls, a subclass of Metaobject + * should be defined. + * + *

To obtain a metaobject, calls _getMetaobject() + * on a reflective object. For example, + * + * 

+ * Metaobject m = ((Metalevel)reflectiveObject)._getMetaobject();
+ *
+ * + * @see javassist.tools.reflect.ClassMetaobject + * @see javassist.tools.reflect.Metalevel + */ +public class Metaobject implements Serializable { + protected ClassMetaobject classmetaobject; + protected Metalevel baseobject; + protected Method[] methods; + + /** + * Constructs a Metaobject. The metaobject is + * constructed before the constructor is called on the base-level + * object. + * + * @param self the object that this metaobject is associated with. + * @param args the parameters passed to the constructor of + * self. + */ + public Metaobject(Object self, Object[] args) { + baseobject = (Metalevel)self; + classmetaobject = baseobject._getClass(); + methods = classmetaobject.getReflectiveMethods(); + } + + /** + * Constructs a Metaobject without initialization. + * If calling this constructor, a subclass should be responsible + * for initialization. + */ + protected Metaobject() { + baseobject = null; + classmetaobject = null; + methods = null; + } + + private void writeObject(ObjectOutputStream out) throws IOException { + out.writeObject(baseobject); + } + + private void readObject(ObjectInputStream in) + throws IOException, ClassNotFoundException + { + baseobject = (Metalevel)in.readObject(); + classmetaobject = baseobject._getClass(); + methods = classmetaobject.getReflectiveMethods(); + } + + /** + * Obtains the class metaobject associated with this metaobject. + * + * @see javassist.tools.reflect.ClassMetaobject + */ + public final ClassMetaobject getClassMetaobject() { + return classmetaobject; + } + + /** + * Obtains the object controlled by this metaobject. + */ + public final Object getObject() { + return baseobject; + } + + /** + * Changes the object controlled by this metaobject. + * + * @param self the object + */ + public final void setObject(Object self) { + baseobject = (Metalevel)self; + classmetaobject = baseobject._getClass(); + methods = classmetaobject.getReflectiveMethods(); + + // call _setMetaobject() after the metaobject is settled. + baseobject._setMetaobject(this); + } + + /** + * Returns the name of the method specified + * by identifier. + */ + public final String getMethodName(int identifier) { + String mname = methods[identifier].getName(); + int j = ClassMetaobject.methodPrefixLen; + for (;;) { + char c = mname.charAt(j++); + if (c < '0' || '9' < c) + break; + } + + return mname.substring(j); + } + + /** + * Returns an array of Class objects representing the + * formal parameter types of the method specified + * by identifier. + */ + public final Class[] getParameterTypes(int identifier) { + return methods[identifier].getParameterTypes(); + } + + /** + * Returns a Class objects representing the + * return type of the method specified by identifier. + */ + public final Class getReturnType(int identifier) { + return methods[identifier].getReturnType(); + } + + /** + * Is invoked when public fields of the base-level + * class are read and the runtime system intercepts it. + * This method simply returns the value of the field. + * + *

Every subclass of this class should redefine this method. + */ + public Object trapFieldRead(String name) { + Class jc = getClassMetaobject().getJavaClass(); + try { + return jc.getField(name).get(getObject()); + } + catch (NoSuchFieldException e) { + throw new RuntimeException(e.toString()); + } + catch (IllegalAccessException e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Is invoked when public fields of the base-level + * class are modified and the runtime system intercepts it. + * This method simply sets the field to the given value. + * + *

Every subclass of this class should redefine this method. + */ + public void trapFieldWrite(String name, Object value) { + Class jc = getClassMetaobject().getJavaClass(); + try { + jc.getField(name).set(getObject(), value); + } + catch (NoSuchFieldException e) { + throw new RuntimeException(e.toString()); + } + catch (IllegalAccessException e) { + throw new RuntimeException(e.toString()); + } + } + + /** + * Is invoked when base-level method invocation is intercepted. + * This method simply executes the intercepted method invocation + * with the original parameters and returns the resulting value. + * + *

Every subclass of this class should redefine this method. + * + *

Note: this method is not invoked if the base-level method + * is invoked by a constructor in the super class. For example, + * + * 

+     * abstract class A {
+     *   abstract void initialize();
+     *   A() {
+     *       initialize();    // not intercepted
+     *   }
+     * }
+     *
+     * class B extends A {
+     *   void initialize() { System.out.println("initialize()"); }
+     *   B() {
+     *       super();
+     *       initialize();    // intercepted
+     *   }
+     * }
+ * + *

if an instance of B is created, + * the invocation of initialize() in B is intercepted only once. + * The first invocation by the constructor in A is not intercepted. + * This is because the link between a base-level object and a + * metaobject is not created until the execution of a + * constructor of the super class finishes. + */ + public Object trapMethodcall(int identifier, Object[] args) + throws Throwable + { + try { + return methods[identifier].invoke(getObject(), args); + } + catch (java.lang.reflect.InvocationTargetException e) { + throw e.getTargetException(); + } + catch (java.lang.IllegalAccessException e) { + throw new CannotInvokeException(e); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java new file mode 100644 index 0000000..4e2219f --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java @@ -0,0 +1,403 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +import java.util.Iterator; +import com.wenshuo.agent.javassist.*; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; +import com.wenshuo.agent.javassist.bytecode.ClassFile; +import com.wenshuo.agent.javassist.bytecode.BadBytecode; +import com.wenshuo.agent.javassist.bytecode.MethodInfo; + +/** + * The class implementing the behavioral reflection mechanism. + * + *

If a class is reflective, + * then all the method invocations on every + * instance of that class are intercepted by the runtime + * metaobject controlling that instance. The methods inherited from the + * super classes are also intercepted except final methods. To intercept + * a final method in a super class, that super class must be also reflective. + * + *

To do this, the original class file representing a reflective class: + * + * 

+ * class Person {
+ *   public int f(int i) { return i + 1; }
+ *   public int value;
+ * }
+ *
+ * + *

is modified so that it represents a class: + * + * 

+ * class Person implements Metalevel {
+ *   public int _original_f(int i) { return i + 1; }
+ *   public int f(int i) { delegate to the metaobject }
+ *
+ *   public int value;
+ *   public int _r_value() { read "value" }
+ *   public void _w_value(int v) { write "value" }
+ *
+ *   public ClassMetaobject _getClass() { return a class metaobject }
+ *   public Metaobject _getMetaobject() { return a metaobject }
+ *   public void _setMetaobject(Metaobject m) { change a metaobject }
+ * }
+ *
+ * + * @see javassist.tools.reflect.ClassMetaobject + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.Loader + * @see javassist.tools.reflect.Compiler + */ +public class Reflection implements Translator { + + static final String classobjectField = "_classobject"; + static final String classobjectAccessor = "_getClass"; + static final String metaobjectField = "_metaobject"; + static final String metaobjectGetter = "_getMetaobject"; + static final String metaobjectSetter = "_setMetaobject"; + static final String readPrefix = "_r_"; + static final String writePrefix = "_w_"; + + static final String metaobjectClassName = "javassist.tools.reflect.Metaobject"; + static final String classMetaobjectClassName + = "javassist.tools.reflect.ClassMetaobject"; + + protected CtMethod trapMethod, trapStaticMethod; + protected CtMethod trapRead, trapWrite; + protected CtClass[] readParam; + + protected ClassPool classPool; + protected CodeConverter converter; + + private boolean isExcluded(String name) { + return name.startsWith(ClassMetaobject.methodPrefix) + || name.equals(classobjectAccessor) + || name.equals(metaobjectSetter) + || name.equals(metaobjectGetter) + || name.startsWith(readPrefix) + || name.startsWith(writePrefix); + } + + /** + * Constructs a new Reflection object. + */ + public Reflection() { + classPool = null; + converter = new CodeConverter(); + } + + /** + * Initializes the object. + */ + public void start(ClassPool pool) throws NotFoundException { + classPool = pool; + final String msg + = "javassist.tools.reflect.Sample is not found or broken."; + try { + CtClass c = classPool.get("javassist.tools.reflect.Sample"); + rebuildClassFile(c.getClassFile()); + trapMethod = c.getDeclaredMethod("trap"); + trapStaticMethod = c.getDeclaredMethod("trapStatic"); + trapRead = c.getDeclaredMethod("trapRead"); + trapWrite = c.getDeclaredMethod("trapWrite"); + readParam + = new CtClass[] { classPool.get("java.lang.Object") }; + } + catch (NotFoundException e) { + throw new RuntimeException(msg); + } catch (BadBytecode e) { + throw new RuntimeException(msg); + } + } + + /** + * Inserts hooks for intercepting accesses to the fields declared + * in reflective classes. + */ + public void onLoad(ClassPool pool, String classname) + throws CannotCompileException, NotFoundException + { + CtClass clazz = pool.get(classname); + clazz.instrument(converter); + } + + /** + * Produces a reflective class. + * If the super class is also made reflective, it must be done + * before the sub class. + * + * @param classname the name of the reflective class + * @param metaobject the class name of metaobjects. + * @param metaclass the class name of the class metaobject. + * @return false if the class is already reflective. + * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.ClassMetaobject + */ + public boolean makeReflective(String classname, + String metaobject, String metaclass) + throws CannotCompileException, NotFoundException + { + return makeReflective(classPool.get(classname), + classPool.get(metaobject), + classPool.get(metaclass)); + } + + /** + * Produces a reflective class. + * If the super class is also made reflective, it must be done + * before the sub class. + * + * @param clazz the reflective class. + * @param metaobject the class of metaobjects. + * It must be a subclass of + * Metaobject. + * @param metaclass the class of the class metaobject. + * It must be a subclass of + * ClassMetaobject. + * @return false if the class is already reflective. + * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.ClassMetaobject + */ + public boolean makeReflective(Class clazz, + Class metaobject, Class metaclass) + throws CannotCompileException, NotFoundException + { + return makeReflective(clazz.getName(), metaobject.getName(), + metaclass.getName()); + } + + /** + * Produces a reflective class. It modifies the given + * CtClass object and makes it reflective. + * If the super class is also made reflective, it must be done + * before the sub class. + * + * @param clazz the reflective class. + * @param metaobject the class of metaobjects. + * It must be a subclass of + * Metaobject. + * @param metaclass the class of the class metaobject. + * It must be a subclass of + * ClassMetaobject. + * @return false if the class is already reflective. + * + * @see javassist.tools.reflect.Metaobject + * @see javassist.tools.reflect.ClassMetaobject + */ + public boolean makeReflective(CtClass clazz, + CtClass metaobject, CtClass metaclass) + throws CannotCompileException, CannotReflectException, + NotFoundException + { + if (clazz.isInterface()) + throw new CannotReflectException( + "Cannot reflect an interface: " + clazz.getName()); + + if (clazz.subclassOf(classPool.get(classMetaobjectClassName))) + throw new CannotReflectException( + "Cannot reflect a subclass of ClassMetaobject: " + + clazz.getName()); + + if (clazz.subclassOf(classPool.get(metaobjectClassName))) + throw new CannotReflectException( + "Cannot reflect a subclass of Metaobject: " + + clazz.getName()); + + registerReflectiveClass(clazz); + return modifyClassfile(clazz, metaobject, metaclass); + } + + /** + * Registers a reflective class. The field accesses to the instances + * of this class are instrumented. + */ + private void registerReflectiveClass(CtClass clazz) { + CtField[] fs = clazz.getDeclaredFields(); + for (int i = 0; i < fs.length; ++i) { + CtField f = fs[i]; + int mod = f.getModifiers(); + if ((mod & Modifier.PUBLIC) != 0 && (mod & Modifier.FINAL) == 0) { + String name = f.getName(); + converter.replaceFieldRead(f, clazz, readPrefix + name); + converter.replaceFieldWrite(f, clazz, writePrefix + name); + } + } + } + + private boolean modifyClassfile(CtClass clazz, CtClass metaobject, + CtClass metaclass) + throws CannotCompileException, NotFoundException + { + if (clazz.getAttribute("Reflective") != null) + return false; // this is already reflective. + else + clazz.setAttribute("Reflective", new byte[0]); + + CtClass mlevel = classPool.get("javassist.tools.reflect.Metalevel"); + boolean addMeta = !clazz.subtypeOf(mlevel); + if (addMeta) + clazz.addInterface(mlevel); + + processMethods(clazz, addMeta); + processFields(clazz); + + CtField f; + if (addMeta) { + f = new CtField(classPool.get("javassist.tools.reflect.Metaobject"), + metaobjectField, clazz); + f.setModifiers(Modifier.PROTECTED); + clazz.addField(f, CtField.Initializer.byNewWithParams(metaobject)); + + clazz.addMethod(CtNewMethod.getter(metaobjectGetter, f)); + clazz.addMethod(CtNewMethod.setter(metaobjectSetter, f)); + } + + f = new CtField(classPool.get("javassist.tools.reflect.ClassMetaobject"), + classobjectField, clazz); + f.setModifiers(Modifier.PRIVATE | Modifier.STATIC); + clazz.addField(f, CtField.Initializer.byNew(metaclass, + new String[] { clazz.getName() })); + + clazz.addMethod(CtNewMethod.getter(classobjectAccessor, f)); + return true; + } + + private void processMethods(CtClass clazz, boolean dontSearch) + throws CannotCompileException, NotFoundException + { + CtMethod[] ms = clazz.getMethods(); + for (int i = 0; i < ms.length; ++i) { + CtMethod m = ms[i]; + int mod = m.getModifiers(); + if (Modifier.isPublic(mod) && !Modifier.isAbstract(mod)) + processMethods0(mod, clazz, m, i, dontSearch); + } + } + + private void processMethods0(int mod, CtClass clazz, + CtMethod m, int identifier, boolean dontSearch) + throws CannotCompileException, NotFoundException + { + CtMethod body; + String name = m.getName(); + + if (isExcluded(name)) // internally-used method inherited + return; // from a reflective class. + + CtMethod m2; + if (m.getDeclaringClass() == clazz) { + if (Modifier.isNative(mod)) + return; + + m2 = m; + if (Modifier.isFinal(mod)) { + mod &= ~Modifier.FINAL; + m2.setModifiers(mod); + } + } + else { + if (Modifier.isFinal(mod)) + return; + + mod &= ~Modifier.NATIVE; + m2 = CtNewMethod.delegator(findOriginal(m, dontSearch), clazz); + m2.setModifiers(mod); + clazz.addMethod(m2); + } + + m2.setName(ClassMetaobject.methodPrefix + identifier + + "_" + name); + + if (Modifier.isStatic(mod)) + body = trapStaticMethod; + else + body = trapMethod; + + CtMethod wmethod + = CtNewMethod.wrapped(m.getReturnType(), name, + m.getParameterTypes(), m.getExceptionTypes(), + body, ConstParameter.integer(identifier), + clazz); + wmethod.setModifiers(mod); + clazz.addMethod(wmethod); + } + + private CtMethod findOriginal(CtMethod m, boolean dontSearch) + throws NotFoundException + { + if (dontSearch) + return m; + + String name = m.getName(); + CtMethod[] ms = m.getDeclaringClass().getDeclaredMethods(); + for (int i = 0; i < ms.length; ++i) { + String orgName = ms[i].getName(); + if (orgName.endsWith(name) + && orgName.startsWith(ClassMetaobject.methodPrefix) + && ms[i].getSignature().equals(m.getSignature())) + return ms[i]; + } + + return m; + } + + private void processFields(CtClass clazz) + throws CannotCompileException, NotFoundException + { + CtField[] fs = clazz.getDeclaredFields(); + for (int i = 0; i < fs.length; ++i) { + CtField f = fs[i]; + int mod = f.getModifiers(); + if ((mod & Modifier.PUBLIC) != 0 && (mod & Modifier.FINAL) == 0) { + mod |= Modifier.STATIC; + String name = f.getName(); + CtClass ftype = f.getType(); + CtMethod wmethod + = CtNewMethod.wrapped(ftype, readPrefix + name, + readParam, null, trapRead, + ConstParameter.string(name), + clazz); + wmethod.setModifiers(mod); + clazz.addMethod(wmethod); + CtClass[] writeParam = new CtClass[2]; + writeParam[0] = classPool.get("java.lang.Object"); + writeParam[1] = ftype; + wmethod = CtNewMethod.wrapped(CtClass.voidType, + writePrefix + name, + writeParam, null, trapWrite, + ConstParameter.string(name), clazz); + wmethod.setModifiers(mod); + clazz.addMethod(wmethod); + } + } + } + + public void rebuildClassFile(ClassFile cf) throws BadBytecode { + if (ClassFile.MAJOR_VERSION < ClassFile.JAVA_6) + return; + + Iterator methods = cf.getMethods().iterator(); + while (methods.hasNext()) { + MethodInfo mi = (MethodInfo)methods.next(); + mi.rebuildStackMap(classPool); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java new file mode 100644 index 0000000..9622be5 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java @@ -0,0 +1,57 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.reflect; + +/** + * A template used for defining a reflective class. + */ +public class Sample { + private Metaobject _metaobject; + private static ClassMetaobject _classobject; + + public Object trap(Object[] args, int identifier) throws Throwable { + Metaobject mobj; + mobj = _metaobject; + if (mobj == null) + return ClassMetaobject.invoke(this, identifier, args); + else + return mobj.trapMethodcall(identifier, args); + } + + public static Object trapStatic(Object[] args, int identifier) + throws Throwable + { + return _classobject.trapMethodcall(identifier, args); + } + + public static Object trapRead(Object[] args, String name) { + if (args[0] == null) + return _classobject.trapFieldRead(name); + else + return ((Metalevel)args[0])._getMetaobject().trapFieldRead(name); + } + + public static Object trapWrite(Object[] args, String name) { + Metalevel base = (Metalevel)args[0]; + if (base == null) + _classobject.trapFieldWrite(name, args[1]); + else + base._getMetaobject().trapFieldWrite(name, args[1]); + + return null; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html new file mode 100644 index 0000000..10a4196 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html @@ -0,0 +1,35 @@ + + +Runtime Behavioral Reflection. + +

(also recently known as interceptors or AOP?) + +

This package enables a metaobject to trap method calls and field +accesses on a regular Java object. It provides a class +Reflection, which is a main module for implementing +runtime behavioral reflection. +It also provides +a class Loader and Compiler +as utilities for dynamically or statically +translating a regular class into a reflective class. + +

An instance of the reflective class is associated with +a runtime metaobject and a runtime class metaobject, which control +the behavior of that instance. +The runtime +metaobject is created for every (base-level) instance but the +runtime class metaobject is created for every (base-level) class. +Metaobject is the root class of the runtime +metaobject and ClassMetaobject is the root class +of the runtime class metaobject. + +

This package is provided as a sample implementation of the +reflection mechanism with Javassist. All the programs in this package +uses only the regular Javassist API; they never call any hidden +methods. + +

The most significant class in this package is Reflection. +See the description of this class first. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java new file mode 100644 index 0000000..4ffcc7a --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java @@ -0,0 +1,251 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +import java.io.*; + +import com.wenshuo.agent.javassist.tools.web.*; +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.ClassPool; +import java.lang.reflect.Method; +import java.util.Hashtable; +import java.util.Vector; + +/** + * An AppletServer object is a web server that an ObjectImporter + * communicates with. It makes the objects specified by + * exportObject() remotely accessible from applets. + * If the classes of the exported objects are requested by the client-side + * JVM, this web server sends proxy classes for the requested classes. + * + * @see javassist.tools.rmi.ObjectImporter + */ +public class AppletServer extends Webserver { + private StubGenerator stubGen; + private Hashtable exportedNames; + private Vector exportedObjects; + + private static final byte[] okHeader + = "HTTP/1.0 200 OK\r\n\r\n".getBytes(); + + /** + * Constructs a web server. + * + * @param port port number + */ + public AppletServer(String port) + throws IOException, NotFoundException, CannotCompileException + { + this(Integer.parseInt(port)); + } + + /** + * Constructs a web server. + * + * @param port port number + */ + public AppletServer(int port) + throws IOException, NotFoundException, CannotCompileException + { + this(ClassPool.getDefault(), new StubGenerator(), port); + } + + /** + * Constructs a web server. + * + * @param port port number + * @param src the source of classs files. + */ + public AppletServer(int port, ClassPool src) + throws IOException, NotFoundException, CannotCompileException + { + this(new ClassPool(src), new StubGenerator(), port); + } + + private AppletServer(ClassPool loader, StubGenerator gen, int port) + throws IOException, NotFoundException, CannotCompileException + { + super(port); + exportedNames = new Hashtable(); + exportedObjects = new Vector(); + stubGen = gen; + addTranslator(loader, gen); + } + + /** + * Begins the HTTP service. + */ + public void run() { + super.run(); + } + + /** + * Exports an object. + * This method produces the bytecode of the proxy class used + * to access the exported object. A remote applet can load + * the proxy class and call a method on the exported object. + * + * @param name the name used for looking the object up. + * @param obj the exported object. + * @return the object identifier + * + * @see javassist.tools.rmi.ObjectImporter#lookupObject(String) + */ + public synchronized int exportObject(String name, Object obj) + throws CannotCompileException + { + Class clazz = obj.getClass(); + ExportedObject eo = new ExportedObject(); + eo.object = obj; + eo.methods = clazz.getMethods(); + exportedObjects.addElement(eo); + eo.identifier = exportedObjects.size() - 1; + if (name != null) + exportedNames.put(name, eo); + + try { + stubGen.makeProxyClass(clazz); + } + catch (NotFoundException e) { + throw new CannotCompileException(e); + } + + return eo.identifier; + } + + /** + * Processes a request from a web browser (an ObjectImporter). + */ + public void doReply(InputStream in, OutputStream out, String cmd) + throws IOException, BadHttpRequest + { + if (cmd.startsWith("POST /rmi ")) + processRMI(in, out); + else if (cmd.startsWith("POST /lookup ")) + lookupName(cmd, in, out); + else + super.doReply(in, out, cmd); + } + + private void processRMI(InputStream ins, OutputStream outs) + throws IOException + { + ObjectInputStream in = new ObjectInputStream(ins); + + int objectId = in.readInt(); + int methodId = in.readInt(); + Exception err = null; + Object rvalue = null; + try { + ExportedObject eo + = (ExportedObject)exportedObjects.elementAt(objectId); + Object[] args = readParameters(in); + rvalue = convertRvalue(eo.methods[methodId].invoke(eo.object, + args)); + } + catch(Exception e) { + err = e; + logging2(e.toString()); + } + + outs.write(okHeader); + ObjectOutputStream out = new ObjectOutputStream(outs); + if (err != null) { + out.writeBoolean(false); + out.writeUTF(err.toString()); + } + else + try { + out.writeBoolean(true); + out.writeObject(rvalue); + } + catch (NotSerializableException e) { + logging2(e.toString()); + } + catch (InvalidClassException e) { + logging2(e.toString()); + } + + out.flush(); + out.close(); + in.close(); + } + + private Object[] readParameters(ObjectInputStream in) + throws IOException, ClassNotFoundException + { + int n = in.readInt(); + Object[] args = new Object[n]; + for (int i = 0; i < n; ++i) { + Object a = in.readObject(); + if (a instanceof RemoteRef) { + RemoteRef ref = (RemoteRef)a; + ExportedObject eo + = (ExportedObject)exportedObjects.elementAt(ref.oid); + a = eo.object; + } + + args[i] = a; + } + + return args; + } + + private Object convertRvalue(Object rvalue) + throws CannotCompileException + { + if (rvalue == null) + return null; // the return type is void. + + String classname = rvalue.getClass().getName(); + if (stubGen.isProxyClass(classname)) + return new RemoteRef(exportObject(null, rvalue), classname); + else + return rvalue; + } + + private void lookupName(String cmd, InputStream ins, OutputStream outs) + throws IOException + { + ObjectInputStream in = new ObjectInputStream(ins); + String name = DataInputStream.readUTF(in); + ExportedObject found = (ExportedObject)exportedNames.get(name); + outs.write(okHeader); + ObjectOutputStream out = new ObjectOutputStream(outs); + if (found == null) { + logging2(name + "not found."); + out.writeInt(-1); // error code + out.writeUTF("error"); + } + else { + logging2(name); + out.writeInt(found.identifier); + out.writeUTF(found.object.getClass().getName()); + } + + out.flush(); + out.close(); + in.close(); + } +} + +class ExportedObject { + public int identifier; + public Object object; + public Method[] methods; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java new file mode 100644 index 0000000..776160e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java @@ -0,0 +1,299 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +import java.io.*; +import java.net.*; +import java.applet.Applet; +import java.lang.reflect.*; + +/** + * The object importer enables applets to call a method on a remote + * object running on the Webserver (the main class of this + * package). + * + *

To access the remote + * object, the applet first calls lookupObject() and + * obtains a proxy object, which is a reference to that object. + * The class name of the proxy object is identical to that of + * the remote object. + * The proxy object provides the same set of methods as the remote object. + * If one of the methods is invoked on the proxy object, + * the invocation is delegated to the remote object. + * From the viewpoint of the applet, therefore, the two objects are + * identical. The applet can access the object on the server + * with the regular Java syntax without concern about the actual + * location. + * + *

The methods remotely called by the applet must be public. + * This is true even if the applet's class and the remote object's classs + * belong to the same package. + * + *

If class X is a class of remote objects, a subclass of X must be + * also a class of remote objects. On the other hand, this restriction + * is not applied to the superclass of X. The class X does not have to + * contain a constructor taking no arguments. + * + *

The parameters to a remote method is passed in the call-by-value + * manner. Thus all the parameter classes must implement + * java.io.Serializable. However, if the parameter is the + * proxy object, the reference to the remote object instead of a copy of + * the object is passed to the method. + * + *

Because of the limitations of the current implementation, + *

    + *
  • The parameter objects cannot contain the proxy + * object as a field value. + *
  • If class C is of the remote object, then + * the applet cannot instantiate C locally or remotely. + *
+ * + *

All the exceptions thrown by the remote object are converted + * into RemoteException. Since this exception is a subclass + * of RuntimeException, the caller method does not need + * to catch the exception. However, good programs should catch + * the RuntimeException. + * + * @see javassist.tools.rmi.AppletServer + * @see javassist.tools.rmi.RemoteException + * @see javassist.tools.web.Viewer + */ +public class ObjectImporter implements java.io.Serializable { + private final byte[] endofline = { 0x0d, 0x0a }; + private String servername, orgServername; + private int port, orgPort; + + protected byte[] lookupCommand = "POST /lookup HTTP/1.0".getBytes(); + protected byte[] rmiCommand = "POST /rmi HTTP/1.0".getBytes(); + + /** + * Constructs an object importer. + * + *

Remote objects are imported from the web server that the given + * applet has been loaded from. + * + * @param applet the applet loaded from the Webserver. + */ + public ObjectImporter(Applet applet) { + URL codebase = applet.getCodeBase(); + orgServername = servername = codebase.getHost(); + orgPort = port = codebase.getPort(); + } + + /** + * Constructs an object importer. + * + *

If you run a program with javassist.tools.web.Viewer, + * you can construct an object importer as follows: + * + * 

+     * Viewer v = (Viewer)this.getClass().getClassLoader();
+     * ObjectImporter oi = new ObjectImporter(v.getServer(), v.getPort());
+     *
+ * + * @see javassist.tools.web.Viewer + */ + public ObjectImporter(String servername, int port) { + this.orgServername = this.servername = servername; + this.orgPort = this.port = port; + } + + /** + * Finds the object exported by a server with the specified name. + * If the object is not found, this method returns null. + * + * @param name the name of the exported object. + * @return the proxy object or null. + */ + public Object getObject(String name) { + try { + return lookupObject(name); + } + catch (ObjectNotFoundException e) { + return null; + } + } + + /** + * Sets an http proxy server. After this method is called, the object + * importer connects a server through the http proxy server. + */ + public void setHttpProxy(String host, int port) { + String proxyHeader = "POST http://" + orgServername + ":" + orgPort; + String cmd = proxyHeader + "/lookup HTTP/1.0"; + lookupCommand = cmd.getBytes(); + cmd = proxyHeader + "/rmi HTTP/1.0"; + rmiCommand = cmd.getBytes(); + this.servername = host; + this.port = port; + } + + /** + * Finds the object exported by the server with the specified name. + * It sends a POST request to the server (via an http proxy server + * if needed). + * + * @param name the name of the exported object. + * @return the proxy object. + */ + public Object lookupObject(String name) throws ObjectNotFoundException + { + try { + Socket sock = new Socket(servername, port); + OutputStream out = sock.getOutputStream(); + out.write(lookupCommand); + out.write(endofline); + out.write(endofline); + + ObjectOutputStream dout = new ObjectOutputStream(out); + dout.writeUTF(name); + dout.flush(); + + InputStream in = new BufferedInputStream(sock.getInputStream()); + skipHeader(in); + ObjectInputStream din = new ObjectInputStream(in); + int n = din.readInt(); + String classname = din.readUTF(); + din.close(); + dout.close(); + sock.close(); + + if (n >= 0) + return createProxy(n, classname); + } + catch (Exception e) { + e.printStackTrace(); + throw new ObjectNotFoundException(name, e); + } + + throw new ObjectNotFoundException(name); + } + + private static final Class[] proxyConstructorParamTypes + = new Class[] { ObjectImporter.class, int.class }; + + private Object createProxy(int oid, String classname) throws Exception { + Class c = Class.forName(classname); + Constructor cons = c.getConstructor(proxyConstructorParamTypes); + return cons.newInstance(new Object[] { this, new Integer(oid) }); + } + + /** + * Calls a method on a remote object. + * It sends a POST request to the server (via an http proxy server + * if needed). + * + *

This method is called by only proxy objects. + */ + public Object call(int objectid, int methodid, Object[] args) + throws RemoteException + { + boolean result; + Object rvalue; + String errmsg; + + try { + /* This method establishes a raw tcp connection for sending + * a POST message. Thus the object cannot communicate a + * remote object beyond a fire wall. To avoid this problem, + * the connection should be established with a mechanism + * collaborating a proxy server. Unfortunately, java.lang.URL + * does not seem to provide such a mechanism. + * + * You might think that using HttpURLConnection is a better + * way than constructing a raw tcp connection. Unfortunately, + * URL.openConnection() does not return an HttpURLConnection + * object in Netscape's JVM. It returns a + * netscape.net.URLConnection object. + * + * lookupObject() has the same problem. + */ + Socket sock = new Socket(servername, port); + OutputStream out = new BufferedOutputStream( + sock.getOutputStream()); + out.write(rmiCommand); + out.write(endofline); + out.write(endofline); + + ObjectOutputStream dout = new ObjectOutputStream(out); + dout.writeInt(objectid); + dout.writeInt(methodid); + writeParameters(dout, args); + dout.flush(); + + InputStream ins = new BufferedInputStream(sock.getInputStream()); + skipHeader(ins); + ObjectInputStream din = new ObjectInputStream(ins); + result = din.readBoolean(); + rvalue = null; + errmsg = null; + if (result) + rvalue = din.readObject(); + else + errmsg = din.readUTF(); + + din.close(); + dout.close(); + sock.close(); + + if (rvalue instanceof RemoteRef) { + RemoteRef ref = (RemoteRef)rvalue; + rvalue = createProxy(ref.oid, ref.classname); + } + } + catch (ClassNotFoundException e) { + throw new RemoteException(e); + } + catch (IOException e) { + throw new RemoteException(e); + } + catch (Exception e) { + throw new RemoteException(e); + } + + if (result) + return rvalue; + else + throw new RemoteException(errmsg); + } + + private void skipHeader(InputStream in) throws IOException { + int len; + do { + int c; + len = 0; + while ((c = in.read()) >= 0 && c != 0x0d) + ++len; + + in.read(); /* skip 0x0a (LF) */ + } while (len > 0); + } + + private void writeParameters(ObjectOutputStream dout, Object[] params) + throws IOException + { + int n = params.length; + dout.writeInt(n); + for (int i = 0; i < n; ++i) + if (params[i] instanceof Proxy) { + Proxy p = (Proxy)params[i]; + dout.writeObject(new RemoteRef(p._getObjectId())); + } + else + dout.writeObject(params[i]); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java new file mode 100644 index 0000000..cc4f801 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java @@ -0,0 +1,27 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +public class ObjectNotFoundException extends Exception { + public ObjectNotFoundException(String name) { + super(name + " is not exported"); + } + + public ObjectNotFoundException(String name, Exception e) { + super(name + " because of " + e.toString()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java new file mode 100644 index 0000000..9be28be --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java @@ -0,0 +1,26 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +/** + * An interface implemented by proxy classes. + * + * @see javassist.tools.rmi.StubGenerator + */ +public interface Proxy { + int _getObjectId(); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java new file mode 100644 index 0000000..9d6a3c7 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java @@ -0,0 +1,31 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +/** + * RemoteException represents any exception thrown + * during remote method invocation. + */ +public class RemoteException extends RuntimeException { + public RemoteException(String msg) { + super(msg); + } + + public RemoteException(Exception e) { + super("by " + e.toString()); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java new file mode 100644 index 0000000..a35a417 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java @@ -0,0 +1,36 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +/** + * Remote reference. This class is internally used for sending a remote + * reference through a network stream. + */ +public class RemoteRef implements java.io.Serializable { + public int oid; + public String classname; + + public RemoteRef(int i) { + oid = i; + classname = null; + } + + public RemoteRef(int i, String name) { + oid = i; + classname = name; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java new file mode 100644 index 0000000..409e959 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java @@ -0,0 +1,37 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +/** + * A template used for defining a proxy class. + * The class file of this class is read by the StubGenerator + * class. + */ +public class Sample { + private ObjectImporter importer; + private int objectId; + + public Object forward(Object[] args, int identifier) { + return importer.call(objectId, identifier, args); + } + + public static Object forwardStatic(Object[] args, int identifier) + throws RemoteException + { + throw new RemoteException("cannot call a static method."); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java new file mode 100644 index 0000000..9eaf6bf --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java @@ -0,0 +1,256 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.rmi; + +import com.wenshuo.agent.javassist.*; +import java.lang.reflect.Method; +import java.util.Hashtable; +import com.wenshuo.agent.javassist.CtMethod.ConstParameter; + +/** + * A stub-code generator. It is used for producing a proxy class. + * + *

The proxy class for class A is as follows: + * + * 

public class A implements Proxy, Serializable {
+ *   private ObjectImporter importer;
+ *   private int objectId;
+ *   public int _getObjectId() { return objectId; }
+ *   public A(ObjectImporter oi, int id) {
+ *     importer = oi; objectId = id;
+ *   }
+ *
+ *   ... the same methods that the original class A declares ...
+ * }
+ * + *

Instances of the proxy class is created by an + * ObjectImporter object. + */ +public class StubGenerator implements Translator { + private static final String fieldImporter = "importer"; + private static final String fieldObjectId = "objectId"; + private static final String accessorObjectId = "_getObjectId"; + private static final String sampleClass = "javassist.tools.rmi.Sample"; + + private ClassPool classPool; + private Hashtable proxyClasses; + private CtMethod forwardMethod; + private CtMethod forwardStaticMethod; + + private CtClass[] proxyConstructorParamTypes; + private CtClass[] interfacesForProxy; + private CtClass[] exceptionForProxy; + + /** + * Constructs a stub-code generator. + */ + public StubGenerator() { + proxyClasses = new Hashtable(); + } + + /** + * Initializes the object. + * This is a method declared in javassist.Translator. + * + * @see javassist.Translator#start(ClassPool) + */ + public void start(ClassPool pool) throws NotFoundException { + classPool = pool; + CtClass c = pool.get(sampleClass); + forwardMethod = c.getDeclaredMethod("forward"); + forwardStaticMethod = c.getDeclaredMethod("forwardStatic"); + + proxyConstructorParamTypes + = pool.get(new String[] { "javassist.tools.rmi.ObjectImporter", + "int" }); + interfacesForProxy + = pool.get(new String[] { "java.io.Serializable", + "javassist.tools.rmi.Proxy" }); + exceptionForProxy + = new CtClass[] { pool.get("javassist.tools.rmi.RemoteException") }; + } + + /** + * Does nothing. + * This is a method declared in javassist.Translator. + * @see javassist.Translator#onLoad(ClassPool,String) + */ + public void onLoad(ClassPool pool, String classname) {} + + /** + * Returns true if the specified class is a proxy class + * recorded by makeProxyClass(). + * + * @param name a fully-qualified class name + */ + public boolean isProxyClass(String name) { + return proxyClasses.get(name) != null; + } + + /** + * Makes a proxy class. The produced class is substituted + * for the original class. + * + * @param clazz the class referenced + * through the proxy class. + * @return false if the proxy class + * has been already produced. + */ + public synchronized boolean makeProxyClass(Class clazz) + throws CannotCompileException, NotFoundException + { + String classname = clazz.getName(); + if (proxyClasses.get(classname) != null) + return false; + else { + CtClass ctclazz = produceProxyClass(classPool.get(classname), + clazz); + proxyClasses.put(classname, ctclazz); + modifySuperclass(ctclazz); + return true; + } + } + + private CtClass produceProxyClass(CtClass orgclass, Class orgRtClass) + throws CannotCompileException, NotFoundException + { + int modify = orgclass.getModifiers(); + if (Modifier.isAbstract(modify) || Modifier.isNative(modify) + || !Modifier.isPublic(modify)) + throw new CannotCompileException(orgclass.getName() + + " must be public, non-native, and non-abstract."); + + CtClass proxy = classPool.makeClass(orgclass.getName(), + orgclass.getSuperclass()); + + proxy.setInterfaces(interfacesForProxy); + + CtField f + = new CtField(classPool.get("javassist.tools.rmi.ObjectImporter"), + fieldImporter, proxy); + f.setModifiers(Modifier.PRIVATE); + proxy.addField(f, CtField.Initializer.byParameter(0)); + + f = new CtField(CtClass.intType, fieldObjectId, proxy); + f.setModifiers(Modifier.PRIVATE); + proxy.addField(f, CtField.Initializer.byParameter(1)); + + proxy.addMethod(CtNewMethod.getter(accessorObjectId, f)); + + proxy.addConstructor(CtNewConstructor.defaultConstructor(proxy)); + CtConstructor cons + = CtNewConstructor.skeleton(proxyConstructorParamTypes, + null, proxy); + proxy.addConstructor(cons); + + try { + addMethods(proxy, orgRtClass.getMethods()); + return proxy; + } + catch (SecurityException e) { + throw new CannotCompileException(e); + } + } + + private CtClass toCtClass(Class rtclass) throws NotFoundException { + String name; + if (!rtclass.isArray()) + name = rtclass.getName(); + else { + StringBuffer sbuf = new StringBuffer(); + do { + sbuf.append("[]"); + rtclass = rtclass.getComponentType(); + } while(rtclass.isArray()); + sbuf.insert(0, rtclass.getName()); + name = sbuf.toString(); + } + + return classPool.get(name); + } + + private CtClass[] toCtClass(Class[] rtclasses) throws NotFoundException { + int n = rtclasses.length; + CtClass[] ctclasses = new CtClass[n]; + for (int i = 0; i < n; ++i) + ctclasses[i] = toCtClass(rtclasses[i]); + + return ctclasses; + } + + /* ms must not be an array of CtMethod. To invoke a method ms[i] + * on a server, a client must send i to the server. + */ + private void addMethods(CtClass proxy, Method[] ms) + throws CannotCompileException, NotFoundException + { + CtMethod wmethod; + for (int i = 0; i < ms.length; ++i) { + Method m = ms[i]; + int mod = m.getModifiers(); + if (m.getDeclaringClass() != Object.class + && !Modifier.isFinal(mod)) + if (Modifier.isPublic(mod)) { + CtMethod body; + if (Modifier.isStatic(mod)) + body = forwardStaticMethod; + else + body = forwardMethod; + + wmethod + = CtNewMethod.wrapped(toCtClass(m.getReturnType()), + m.getName(), + toCtClass(m.getParameterTypes()), + exceptionForProxy, + body, + ConstParameter.integer(i), + proxy); + wmethod.setModifiers(mod); + proxy.addMethod(wmethod); + } + else if (!Modifier.isProtected(mod) + && !Modifier.isPrivate(mod)) + // if package method + throw new CannotCompileException( + "the methods must be public, protected, or private."); + } + } + + /** + * Adds a default constructor to the super classes. + */ + private void modifySuperclass(CtClass orgclass) + throws CannotCompileException, NotFoundException + { + CtClass superclazz; + for (;; orgclass = superclazz) { + superclazz = orgclass.getSuperclass(); + if (superclazz == null) + break; + + try { + superclazz.getDeclaredConstructor(null); + break; // the constructor with no arguments is found. + } + catch (NotFoundException e) { + } + + superclazz.addConstructor( + CtNewConstructor.defaultConstructor(superclazz)); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html new file mode 100644 index 0000000..5432a94 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html @@ -0,0 +1,16 @@ + + +Sample implementation of remote method invocation. + +

This package enables applets to access remote objects +running on the web server with regular Java syntax. +It is provided as a sample implementation with Javassist. +All the programs in this package uses only the regular +Javassist API; they never call any hidden methods. + +

The most significant class of this package is +ObjectImporter. +See the description of this class first. + + + diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java b/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java new file mode 100644 index 0000000..93cf67c --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java @@ -0,0 +1,35 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.web; + +/** + * Thrown when receiving an invalid HTTP request. + */ +public class BadHttpRequest extends Exception { + private Exception e; + + public BadHttpRequest() { e = null; } + + public BadHttpRequest(Exception _e) { e = _e; } + + public String toString() { + if (e == null) + return super.toString(); + else + return e.toString(); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java b/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java new file mode 100644 index 0000000..52d5416 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java @@ -0,0 +1,209 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.web; + +import java.io.*; +import java.net.*; + +/** + * A sample applet viewer. + * + *

This is a sort of applet viewer that can run any program even if + * the main class is not a subclass of Applet. + * This viewwer first calls main() in the main class. + * + *

To run, you should type: + * + * 

% java javassist.tools.web.Viewer host port Main arg1, ...
+ * + *

This command calls Main.main() with arg1,... + * All classes including Main are fetched from + * a server http://host:port. + * Only the class file for Viewer must exist + * on a local file system at the client side; even other + * javassist.* classes are not needed at the client side. + * Viewer uses only Java core API classes. + * + *

Note: since a Viewer object is a class loader, + * a program loaded by this object can call a method in Viewer. + * For example, you can write something like this: + * + * 

+ * Viewer v = (Viewer)this.getClass().getClassLoader();
+ * String port = v.getPort();
+ *
+ * + */ +public class Viewer extends ClassLoader { + private String server; + private int port; + + /** + * Starts a program. + */ + public static void main(String[] args) throws Throwable { + if (args.length >= 3) { + Viewer cl = new Viewer(args[0], Integer.parseInt(args[1])); + String[] args2 = new String[args.length - 3]; + System.arraycopy(args, 3, args2, 0, args.length - 3); + cl.run(args[2], args2); + } + else + System.err.println( + "Usage: java javassist.tools.web.Viewer class [args ...]"); + } + + /** + * Constructs a viewer. + * + * @param host server name + * @param p port number + */ + public Viewer(String host, int p) { + server = host; + port = p; + } + + /** + * Returns the server name. + */ + public String getServer() { return server; } + + /** + * Returns the port number. + */ + public int getPort() { return port; } + + /** + * Invokes main() in the class specified by classname. + * + * @param classname executed class + * @param args the arguments passed to main(). + */ + public void run(String classname, String[] args) + throws Throwable + { + Class c = loadClass(classname); + try { + c.getDeclaredMethod("main", new Class[] { String[].class }) + .invoke(null, new Object[] { args }); + } + catch (java.lang.reflect.InvocationTargetException e) { + throw e.getTargetException(); + } + } + + /** + * Requests the class loader to load a class. + */ + protected synchronized Class loadClass(String name, boolean resolve) + throws ClassNotFoundException + { + Class c = findLoadedClass(name); + if (c == null) + c = findClass(name); + + if (c == null) + throw new ClassNotFoundException(name); + + if (resolve) + resolveClass(c); + + return c; + } + + /** + * Finds the specified class. The implementation in this class + * fetches the class from the http server. If the class is + * either java.*, javax.*, or + * Viewer, then it is loaded by the parent class + * loader. + * + *

This method can be overridden by a subclass of + * Viewer. + */ + protected Class findClass(String name) throws ClassNotFoundException { + Class c = null; + if (name.startsWith("java.") || name.startsWith("javax.") + || name.equals("javassist.tools.web.Viewer")) + c = findSystemClass(name); + + if (c == null) + try { + byte[] b = fetchClass(name); + if (b != null) + c = defineClass(name, b, 0, b.length); + } + catch (Exception e) { + } + + return c; + } + + /** + * Fetches the class file of the specified class from the http + * server. + */ + protected byte[] fetchClass(String classname) throws Exception + { + byte[] b; + URL url = new URL("http", server, port, + "/" + classname.replace('.', '/') + ".class"); + URLConnection con = url.openConnection(); + con.connect(); + int size = con.getContentLength(); + InputStream s = con.getInputStream(); + if (size <= 0) + b = readStream(s); + else { + b = new byte[size]; + int len = 0; + do { + int n = s.read(b, len, size - len); + if (n < 0) { + s.close(); + throw new IOException("the stream was closed: " + + classname); + } + len += n; + } while (len < size); + } + + s.close(); + return b; + } + + private byte[] readStream(InputStream fin) throws IOException { + byte[] buf = new byte[4096]; + int size = 0; + int len = 0; + do { + size += len; + if (buf.length - size <= 0) { + byte[] newbuf = new byte[buf.length * 2]; + System.arraycopy(buf, 0, newbuf, 0, size); + buf = newbuf; + } + + len = fin.read(buf, size, buf.length - size); + } while (len >= 0); + + byte[] result = new byte[size]; + System.arraycopy(buf, 0, result, 0, size); + return result; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java b/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java new file mode 100644 index 0000000..5511ef2 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java @@ -0,0 +1,408 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.tools.web; + +import java.net.*; +import java.io.*; +import java.util.Date; +import com.wenshuo.agent.javassist.*; + +/** + * A web server for running sample programs. + * + *

This enables a Java program to instrument class files loaded by + * web browsers for applets. Since the (standard) security manager + * does not allow an applet to create and use a class loader, + * instrumenting class files must be done by this web server. + * + *

Note: although this class is included in the Javassist API, + * it is provided as a sample implementation of the web server using + * Javassist. Especially, there might be security flaws in this server. + * Please use this with YOUR OWN RISK. + */ +public class Webserver { + private ServerSocket socket; + private ClassPool classPool; + protected Translator translator; + + private final static byte[] endofline = { 0x0d, 0x0a }; + + private final static int typeHtml = 1; + private final static int typeClass = 2; + private final static int typeGif = 3; + private final static int typeJpeg = 4; + private final static int typeText = 5; + + /** + * If this field is not null, the class files taken from + * ClassPool are written out under the directory + * specified by this field. The directory name must not end + * with a directory separator. + */ + public String debugDir = null; + + /** + * The top directory of html (and .gif, .class, ...) files. + * It must end with the directory separator such as "/". + * (For portability, "/" should be used as the directory separator. + * Javassist automatically translates "/" into a platform-dependent + * character.) + * If this field is null, the top directory is the current one where + * the JVM is running. + * + *

If the given URL indicates a class file and the class file + * is not found under the directory specified by this variable, + * then Class.getResourceAsStream() is called + * for searching the Java class paths. + */ + public String htmlfileBase = null; + + /** + * Starts a web server. + * The port number is specified by the first argument. + */ + public static void main(String[] args) throws IOException { + if (args.length == 1) { + Webserver web = new Webserver(args[0]); + web.run(); + } + else + System.err.println( + "Usage: java javassist.tools.web.Webserver "); + } + + /** + * Constructs a web server. + * + * @param port port number + */ + public Webserver(String port) throws IOException { + this(Integer.parseInt(port)); + } + + /** + * Constructs a web server. + * + * @param port port number + */ + public Webserver(int port) throws IOException { + socket = new ServerSocket(port); + classPool = null; + translator = null; + } + + /** + * Requests the web server to use the specified + * ClassPool object for obtaining a class file. + */ + public void setClassPool(ClassPool loader) { + classPool = loader; + } + + /** + * Adds a translator, which is called whenever a client requests + * a class file. + * + * @param cp the ClassPool object for obtaining + * a class file. + * @param t a translator. + */ + public void addTranslator(ClassPool cp, Translator t) + throws NotFoundException, CannotCompileException + { + classPool = cp; + translator = t; + t.start(classPool); + } + + /** + * Closes the socket. + */ + public void end() throws IOException { + socket.close(); + } + + /** + * Prints a log message. + */ + public void logging(String msg) { + System.out.println(msg); + } + + /** + * Prints a log message. + */ + public void logging(String msg1, String msg2) { + System.out.print(msg1); + System.out.print(" "); + System.out.println(msg2); + } + + /** + * Prints a log message. + */ + public void logging(String msg1, String msg2, String msg3) { + System.out.print(msg1); + System.out.print(" "); + System.out.print(msg2); + System.out.print(" "); + System.out.println(msg3); + } + + /** + * Prints a log message with indentation. + */ + public void logging2(String msg) { + System.out.print(" "); + System.out.println(msg); + } + + /** + * Begins the HTTP service. + */ + public void run() { + System.err.println("ready to service..."); + for (;;) + try { + ServiceThread th = new ServiceThread(this, socket.accept()); + th.start(); + } + catch (IOException e) { + logging(e.toString()); + } + } + + final void process(Socket clnt) throws IOException { + InputStream in = new BufferedInputStream(clnt.getInputStream()); + String cmd = readLine(in); + logging(clnt.getInetAddress().getHostName(), + new Date().toString(), cmd); + while (skipLine(in) > 0){ + } + + OutputStream out = new BufferedOutputStream(clnt.getOutputStream()); + try { + doReply(in, out, cmd); + } + catch (BadHttpRequest e) { + replyError(out, e); + } + + out.flush(); + in.close(); + out.close(); + clnt.close(); + } + + private String readLine(InputStream in) throws IOException { + StringBuffer buf = new StringBuffer(); + int c; + while ((c = in.read()) >= 0 && c != 0x0d) + buf.append((char)c); + + in.read(); /* skip 0x0a (LF) */ + return buf.toString(); + } + + private int skipLine(InputStream in) throws IOException { + int c; + int len = 0; + while ((c = in.read()) >= 0 && c != 0x0d) + ++len; + + in.read(); /* skip 0x0a (LF) */ + return len; + } + + /** + * Proceses a HTTP request from a client. + * + * @param out the output stream to a client + * @param cmd the command received from a client + */ + public void doReply(InputStream in, OutputStream out, String cmd) + throws IOException, BadHttpRequest + { + int len; + int fileType; + String filename, urlName; + + if (cmd.startsWith("GET /")) + filename = urlName = cmd.substring(5, cmd.indexOf(' ', 5)); + else + throw new BadHttpRequest(); + + if (filename.endsWith(".class")) + fileType = typeClass; + else if (filename.endsWith(".html") || filename.endsWith(".htm")) + fileType = typeHtml; + else if (filename.endsWith(".gif")) + fileType = typeGif; + else if (filename.endsWith(".jpg")) + fileType = typeJpeg; + else + fileType = typeText; // or textUnknown + + len = filename.length(); + if (fileType == typeClass + && letUsersSendClassfile(out, filename, len)) + return; + + checkFilename(filename, len); + if (htmlfileBase != null) + filename = htmlfileBase + filename; + + if (File.separatorChar != '/') + filename = filename.replace('/', File.separatorChar); + + File file = new File(filename); + if (file.canRead()) { + sendHeader(out, file.length(), fileType); + FileInputStream fin = new FileInputStream(file); + byte[] filebuffer = new byte[4096]; + for (;;) { + len = fin.read(filebuffer); + if (len <= 0) + break; + else + out.write(filebuffer, 0, len); + } + + fin.close(); + return; + } + + // If the file is not found under the html-file directory, + // then Class.getResourceAsStream() is tried. + + if (fileType == typeClass) { + InputStream fin + = getClass().getResourceAsStream("/" + urlName); + if (fin != null) { + ByteArrayOutputStream barray = new ByteArrayOutputStream(); + byte[] filebuffer = new byte[4096]; + for (;;) { + len = fin.read(filebuffer); + if (len <= 0) + break; + else + barray.write(filebuffer, 0, len); + } + + byte[] classfile = barray.toByteArray(); + sendHeader(out, classfile.length, typeClass); + out.write(classfile); + fin.close(); + return; + } + } + + throw new BadHttpRequest(); + } + + private void checkFilename(String filename, int len) + throws BadHttpRequest + { + for (int i = 0; i < len; ++i) { + char c = filename.charAt(i); + if (!Character.isJavaIdentifierPart(c) && c != '.' && c != '/') + throw new BadHttpRequest(); + } + + if (filename.indexOf("..") >= 0) + throw new BadHttpRequest(); + } + + private boolean letUsersSendClassfile(OutputStream out, + String filename, int length) + throws IOException, BadHttpRequest + { + if (classPool == null) + return false; + + byte[] classfile; + String classname + = filename.substring(0, length - 6).replace('/', '.'); + try { + if (translator != null) + translator.onLoad(classPool, classname); + + CtClass c = classPool.get(classname); + classfile = c.toBytecode(); + if (debugDir != null) + c.writeFile(debugDir); + } + catch (Exception e) { + throw new BadHttpRequest(e); + } + + sendHeader(out, classfile.length, typeClass); + out.write(classfile); + return true; + } + + private void sendHeader(OutputStream out, long dataLength, int filetype) + throws IOException + { + out.write("HTTP/1.0 200 OK".getBytes()); + out.write(endofline); + out.write("Content-Length: ".getBytes()); + out.write(Long.toString(dataLength).getBytes()); + out.write(endofline); + if (filetype == typeClass) + out.write("Content-Type: application/octet-stream".getBytes()); + else if (filetype == typeHtml) + out.write("Content-Type: text/html".getBytes()); + else if (filetype == typeGif) + out.write("Content-Type: image/gif".getBytes()); + else if (filetype == typeJpeg) + out.write("Content-Type: image/jpg".getBytes()); + else if (filetype == typeText) + out.write("Content-Type: text/plain".getBytes()); + + out.write(endofline); + out.write(endofline); + } + + private void replyError(OutputStream out, BadHttpRequest e) + throws IOException + { + logging2("bad request: " + e.toString()); + out.write("HTTP/1.0 400 Bad Request".getBytes()); + out.write(endofline); + out.write(endofline); + out.write("

Bad Request

".getBytes()); + } +} + +class ServiceThread extends Thread { + Webserver web; + Socket sock; + + public ServiceThread(Webserver w, Socket s) { + web = w; + sock = s; + } + + public void run() { + try { + web.process(sock); + } + catch (IOException e) { + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html b/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html new file mode 100644 index 0000000..0c7fb45 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html @@ -0,0 +1,7 @@ + + +Simple web server for running sample code. + +

This package provides a simple web server for sample packages. + + diff --git a/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java b/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java new file mode 100644 index 0000000..45836bf --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java @@ -0,0 +1,251 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util; + +import com.sun.jdi.*; +import com.sun.jdi.connect.*; +import com.sun.jdi.event.*; +import com.sun.jdi.request.*; +import java.io.*; +import java.util.*; + +class Trigger { + void doSwap() {} +} + +/** + * A utility class for dynamically reloading a class by + * the Java Platform Debugger Architecture (JPDA), or HotSwap. + * It works only with JDK 1.4 and later. + * + *

Note: The new definition of the reloaded class must declare + * the same set of methods and fields as the original definition. The + * schema change between the original and new definitions is not allowed + * by the JPDA. + * + *

To use this class, the JVM must be launched with the following + * command line options: + * + *

For Java 1.4,
+ * 

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000
+ *

For Java 5,
+ * 

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000
+ * + *

Note that 8000 is the port number used by HotSwapper. + * Any port number can be specified. Since HotSwapper does not + * launch another JVM for running a target application, this port number + * is used only for inter-thread communication. + * + *

Furthermore, JAVA_HOME/lib/tools.jar must be included + * in the class path. + * + *

Using HotSwapper is easy. See the following example: + * + * 

+ * CtClass clazz = ...
+ * byte[] classFile = clazz.toBytecode();
+ * HotSwapper hs = new HostSwapper(8000);  // 8000 is a port number.
+ * hs.reload("Test", classFile);
+ *
+ * + *

reload() + * first unload the Test class and load a new version of + * the Test class. + * classFile is a byte array containing the new contents of + * the class file for the Test class. The developers can + * repatedly call reload() on the same HotSwapper + * object so that they can reload a number of classes. + * + * @since 3.1 + */ +public class HotSwapper { + private VirtualMachine jvm; + private MethodEntryRequest request; + private Map newClassFiles; + + private Trigger trigger; + + private static final String HOST_NAME = "localhost"; + private static final String TRIGGER_NAME = Trigger.class.getName(); + + /** + * Connects to the JVM. + * + * @param port the port number used for the connection to the JVM. + */ + public HotSwapper(int port) + throws IOException, IllegalConnectorArgumentsException + { + this(Integer.toString(port)); + } + + /** + * Connects to the JVM. + * + * @param port the port number used for the connection to the JVM. + */ + public HotSwapper(String port) + throws IOException, IllegalConnectorArgumentsException + { + jvm = null; + request = null; + newClassFiles = null; + trigger = new Trigger(); + AttachingConnector connector + = (AttachingConnector)findConnector("com.sun.jdi.SocketAttach"); + + Map arguments = connector.defaultArguments(); + ((Connector.Argument)arguments.get("hostname")).setValue(HOST_NAME); + ((Connector.Argument)arguments.get("port")).setValue(port); + jvm = connector.attach(arguments); + EventRequestManager manager = jvm.eventRequestManager(); + request = methodEntryRequests(manager, TRIGGER_NAME); + } + + private Connector findConnector(String connector) throws IOException { + List connectors = Bootstrap.virtualMachineManager().allConnectors(); + Iterator iter = connectors.iterator(); + while (iter.hasNext()) { + Connector con = (Connector)iter.next(); + if (con.name().equals(connector)) { + return con; + } + } + + throw new IOException("Not found: " + connector); + } + + private static MethodEntryRequest methodEntryRequests( + EventRequestManager manager, + String classpattern) { + MethodEntryRequest mereq = manager.createMethodEntryRequest(); + mereq.addClassFilter(classpattern); + mereq.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD); + return mereq; + } + + /* Stops triggering a hotswapper when reload() is called. + */ + private void deleteEventRequest(EventRequestManager manager, + MethodEntryRequest request) { + manager.deleteEventRequest(request); + } + + /** + * Reloads a class. + * + * @param className the fully-qualified class name. + * @param classFile the contents of the class file. + */ + public void reload(String className, byte[] classFile) { + ReferenceType classtype = toRefType(className); + Map map = new HashMap(); + map.put(classtype, classFile); + reload2(map, className); + } + + /** + * Reloads a class. + * + * @param classFiles a map between fully-qualified class names + * and class files. The type of the class names + * is String and the type of the + * class files is byte[]. + */ + public void reload(Map classFiles) { + Set set = classFiles.entrySet(); + Iterator it = set.iterator(); + Map map = new HashMap(); + String className = null; + while (it.hasNext()) { + Map.Entry e = (Map.Entry)it.next(); + className = (String)e.getKey(); + map.put(toRefType(className), e.getValue()); + } + + if (className != null) + reload2(map, className + " etc."); + } + + private ReferenceType toRefType(String className) { + List list = jvm.classesByName(className); + if (list == null || list.isEmpty()) + throw new RuntimeException("no such class: " + className); + else + return (ReferenceType)list.get(0); + } + + private void reload2(Map map, String msg) { + synchronized (trigger) { + startDaemon(); + newClassFiles = map; + request.enable(); + trigger.doSwap(); + request.disable(); + Map ncf = newClassFiles; + if (ncf != null) { + newClassFiles = null; + throw new RuntimeException("failed to reload: " + msg); + } + } + } + + private void startDaemon() { + new Thread() { + private void errorMsg(Throwable e) { + System.err.print("Exception in thread \"HotSwap\" "); + e.printStackTrace(System.err); + } + + public void run() { + EventSet events = null; + try { + events = waitEvent(); + EventIterator iter = events.eventIterator(); + while (iter.hasNext()) { + Event event = iter.nextEvent(); + if (event instanceof MethodEntryEvent) { + hotswap(); + break; + } + } + } + catch (Throwable e) { + errorMsg(e); + } + try { + if (events != null) + events.resume(); + } + catch (Throwable e) { + errorMsg(e); + } + } + }.start(); + } + + EventSet waitEvent() throws InterruptedException { + EventQueue queue = jvm.eventQueue(); + return queue.remove(); + } + + void hotswap() { + Map map = newClassFiles; + jvm.redefineClasses(map); + newClassFiles = null; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/package.html b/src/main/java/com/wenshuo/agent/javassist/util/package.html new file mode 100644 index 0000000..349d996 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/package.html @@ -0,0 +1,5 @@ + + +Utility classes. + + diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java new file mode 100644 index 0000000..02f961e --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java @@ -0,0 +1,237 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.Method; +import java.io.BufferedOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.DataOutputStream; +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.security.ProtectionDomain; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.bytecode.ClassFile; + +/** + * A helper class for implementing ProxyFactory. + * The users of ProxyFactory do not have to see this class. + * + * @see ProxyFactory + */ +public class FactoryHelper { + private static java.lang.reflect.Method defineClass1, defineClass2; + + static { + try { + Class cl = Class.forName("java.lang.ClassLoader"); + defineClass1 = SecurityActions.getDeclaredMethod( + cl, + "defineClass", + new Class[] { String.class, byte[].class, + int.class, int.class }); + + defineClass2 = SecurityActions.getDeclaredMethod( + cl, + "defineClass", + new Class[] { String.class, byte[].class, + int.class, int.class, ProtectionDomain.class }); + } + catch (Exception e) { + throw new RuntimeException("cannot initialize"); + } + } + + /** + * Returns an index for accessing arrays in this class. + * + * @throws RuntimeException if a given type is not a primitive type. + */ + public static final int typeIndex(Class type) { + Class[] list = primitiveTypes; + int n = list.length; + for (int i = 0; i < n; i++) + if (list[i] == type) + return i; + + throw new RuntimeException("bad type:" + type.getName()); + } + + /** + * Class objects representing primitive types. + */ + public static final Class[] primitiveTypes = { + Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE, Integer.TYPE, + Long.TYPE, Float.TYPE, Double.TYPE, Void.TYPE + }; + + /** + * The fully-qualified names of wrapper classes for primitive types. + */ + public static final String[] wrapperTypes = { + "java.lang.Boolean", "java.lang.Byte", "java.lang.Character", + "java.lang.Short", "java.lang.Integer", "java.lang.Long", + "java.lang.Float", "java.lang.Double", "java.lang.Void" + }; + + /** + * The descriptors of the constructors of wrapper classes. + */ + public static final String[] wrapperDesc = { + "(Z)V", "(B)V", "(C)V", "(S)V", "(I)V", "(J)V", + "(F)V", "(D)V" + }; + + /** + * The names of methods for obtaining a primitive value + * from a wrapper object. For example, intValue() + * is such a method for obtaining an integer value from a + * java.lang.Integer object. + */ + public static final String[] unwarpMethods = { + "booleanValue", "byteValue", "charValue", "shortValue", + "intValue", "longValue", "floatValue", "doubleValue" + }; + + /** + * The descriptors of the unwrapping methods contained + * in unwrapMethods. + */ + public static final String[] unwrapDesc = { + "()Z", "()B", "()C", "()S", "()I", "()J", "()F", "()D" + }; + + /** + * The data size of primitive types. long + * and double are 2; the others are 1. + */ + public static final int[] dataSize = { + 1, 1, 1, 1, 1, 2, 1, 2 + }; + + /** + * Loads a class file by a given class loader. + * This method uses a default protection domain for the class + * but it may not work with a security manager or a sigend jar file. + * + * @see #toClass(ClassFile,ClassLoader,ProtectionDomain) + */ + public static Class toClass(ClassFile cf, ClassLoader loader) + throws CannotCompileException + { + return toClass(cf, loader, null); + } + + /** + * Loads a class file by a given class loader. + * + * @param domain if it is null, a default domain is used. + * @since 3.3 + */ + public static Class toClass(ClassFile cf, ClassLoader loader, ProtectionDomain domain) + throws CannotCompileException + { + try { + byte[] b = toBytecode(cf); + Method method; + Object[] args; + if (domain == null) { + method = defineClass1; + args = new Object[] { cf.getName(), b, new Integer(0), + new Integer(b.length) }; + } + else { + method = defineClass2; + args = new Object[] { cf.getName(), b, new Integer(0), + new Integer(b.length), domain }; + } + + return toClass2(method, loader, args); + } + catch (RuntimeException e) { + throw e; + } + catch (java.lang.reflect.InvocationTargetException e) { + throw new CannotCompileException(e.getTargetException()); + } + catch (Exception e) { + throw new CannotCompileException(e); + } + } + + private static synchronized Class toClass2(Method method, + ClassLoader loader, Object[] args) + throws Exception + { + SecurityActions.setAccessible(method, true); + Class clazz = (Class)method.invoke(loader, args); + SecurityActions.setAccessible(method, false); + return clazz; + } + + private static byte[] toBytecode(ClassFile cf) throws IOException { + ByteArrayOutputStream barray = new ByteArrayOutputStream(); + DataOutputStream out = new DataOutputStream(barray); + try { + cf.write(out); + } + finally { + out.close(); + } + + return barray.toByteArray(); + } + + /** + * Writes a class file. + */ + public static void writeFile(ClassFile cf, String directoryName) + throws CannotCompileException { + try { + writeFile0(cf, directoryName); + } + catch (IOException e) { + throw new CannotCompileException(e); + } + } + + private static void writeFile0(ClassFile cf, String directoryName) + throws CannotCompileException, IOException { + String classname = cf.getName(); + String filename = directoryName + File.separatorChar + + classname.replace('.', File.separatorChar) + ".class"; + int pos = filename.lastIndexOf(File.separatorChar); + if (pos > 0) { + String dir = filename.substring(0, pos); + if (!dir.equals(".")) + new File(dir).mkdirs(); + } + + DataOutputStream out = new DataOutputStream(new BufferedOutputStream( + new FileOutputStream(filename))); + try { + cf.write(out); + } + catch (IOException e) { + throw e; + } + finally { + out.close(); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java new file mode 100644 index 0000000..4ebe168 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java @@ -0,0 +1,31 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.Method; + +/** + * Selector of the methods implemented by a handler. + * + * @see ProxyFactory#setFilter(MethodFilter) + */ +public interface MethodFilter { + /** + * Returns true if the given method is implemented by a handler. + */ + boolean isHandled(Method m); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java new file mode 100644 index 0000000..546dc76 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java @@ -0,0 +1,49 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.Method; + +/** + * The interface implemented by the invocation handler of a proxy + * instance. + * + * @see Proxy#setHandler(MethodHandler) + */ +public interface MethodHandler { + /** + * Is called when a method is invoked on a proxy instance associated + * with this handler. This method must process that method invocation. + * + * @param self the proxy instance. + * @param thisMethod the overridden method declared in the super + * class or interface. + * @param proceed the forwarder method for invoking the overridden + * method. It is null if the overridden method is + * abstract or declared in the interface. + * @param args an array of objects containing the values of + * the arguments passed in the method invocation + * on the proxy instance. If a parameter type is + * a primitive type, the type of the array element + * is a wrapper class. + * @return the resulting value of the method invocation. + * + * @throws Throwable if the method invocation fails. + */ + Object invoke(Object self, Method thisMethod, Method proceed, + Object[] args) throws Throwable; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java new file mode 100644 index 0000000..3907742 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java @@ -0,0 +1,33 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +/** + * The interface implemented by proxy classes. + * This interface only provides a setter method. + * To obtain a handler, call {@link ProxyFactory#getHandler(Proxy)}. + * + * @see ProxyFactory + * @since 3.16 + */ +public interface Proxy { + /** + * Sets a handler. It can be used for changing handlers + * during runtime. + */ + void setHandler(MethodHandler mi); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java new file mode 100644 index 0000000..270fc56 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java @@ -0,0 +1,1446 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.Constructor; +import java.lang.reflect.Member; +import java.lang.reflect.Modifier; +import java.security.ProtectionDomain; +import java.util.*; +import java.lang.ref.WeakReference; + +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.NotFoundException; +import com.wenshuo.agent.javassist.bytecode.*; + +/* + * This class is implemented only with the lower-level API of Javassist. + * This design decision is for maximizing performance. + */ + +/** + * Factory of dynamic proxy classes. + * + *

This factory generates a class that extends the given super class and implements + * the given interfaces. The calls of the methods inherited from the super class are + * forwarded and then invoke() is called on the method handler + * associated with instances of the generated class. The calls of the methods from + * the interfaces are also forwarded to the method handler. + * + *

For example, if the following code is executed, + * + * 

+ * ProxyFactory f = new ProxyFactory();
+ * f.setSuperclass(Foo.class);
+ * f.setFilter(new MethodFilter() {
+ *     public boolean isHandled(Method m) {
+ *         // ignore finalize()
+ *         return !m.getName().equals("finalize");
+ *     }
+ * });
+ * Class c = f.createClass();
+ * MethodHandler mi = new MethodHandler() {
+ *     public Object invoke(Object self, Method m, Method proceed,
+ *                          Object[] args) throws Throwable {
+ *         System.out.println("Name: " + m.getName());
+ *         return proceed.invoke(self, args);  // execute the original method.
+ *     }
+ * };
+ * Foo foo = (Foo)c.newInstance();
+ * ((Proxy)foo).setHandler(mi);
+ *
+ * + *

Here, Method is java.lang.reflect.Method.

+ * + *

Then, the following method call will be forwarded to MethodHandler + * mi and prints a message before executing the originally called method + * bar() in Foo. + * + * 

+ * foo.bar();
+ *
+ * + *

The last three lines of the code shown above can be replaced with a call to + * the helper method create, which generates a proxy class, instantiates + * it, and sets the method handler of the instance: + * + * 

+ *     :
+ * Foo foo = (Foo)f.create(new Class[0], new Object[0], mi);
+ *
+ * + *

To change the method handler during runtime, + * execute the following code: + * + * 

+ * MethodHandler mi = ... ;    // alternative handler
+ * ((Proxy)foo).setHandler(mi);
+ *
+ * + *

If setHandler is never called for a proxy instance then it will + * employ the default handler which proceeds by invoking the original method. + * The behaviour of the default handler is identical to the following + * handler: + * + * 

+ * class EmptyHandler implements MethodHandler {
+ *     public Object invoke(Object self, Method m,
+ *                          Method proceed, Object[] args) throws Exception {
+ *         return proceed.invoke(self, args);
+ *     }
+ * }
+ *
+ * + *

A proxy factory caches and reuses proxy classes by default. It is possible to reset + * this default globally by setting static field {@link ProxyFactory#useCache} to false. + * Caching may also be configured for a specific factory by calling instance method + * {@link ProxyFactory#setUseCache(boolean)}. It is strongly recommended that new clients + * of class ProxyFactory enable caching. Failure to do so may lead to exhaustion of + * the heap memory area used to store classes. + * + *

Caching is automatically disabled for any given proxy factory if deprecated instance + * method {@link ProxyFactory#setHandler(MethodHandler)} is called. This method was + * used to specify a default handler which newly created proxy classes should install + * when they create their instances. It is only retained to provide backward compatibility + * with previous releases of javassist. Unfortunately,this legacy behaviour makes caching + * and reuse of proxy classes impossible. The current programming model expects javassist + * clients to set the handler of a proxy instance explicitly by calling method + * {@link Proxy#setHandler(MethodHandler)} as shown in the sample code above. New + * clients are strongly recommended to use this model rather than calling + * {@link ProxyFactory#setHandler(MethodHandler)}. + * + *

A proxy object generated by ProxyFactory is serializable + * if its super class or any of its interfaces implement java.io.Serializable. + * However, a serialized proxy object may not be compatible with future releases. + * The serialization support should be used for short-term storage or RMI. + * + *

For compatibility with older releases serialization of proxy objects is implemented by + * adding a writeReplace method to the proxy class. This allows a proxy to be serialized + * to a conventional {@link java.io.ObjectOutputStream} and deserialized from a corresponding + * {@link java.io.ObjectInputStream}. However this method suffers from several problems, the most + * notable one being that it fails to serialize state inherited from the proxy's superclass. + *

+ * An alternative method of serializing proxy objects is available which fixes these problems. It + * requires inhibiting generation of the writeReplace method and instead using instances of + * {@link javassist.util.proxy.ProxyObjectOutputStream} and {@link javassist.util.proxy.ProxyObjectInputStream} + * (which are subclasses of {@link java.io.ObjectOutputStream} and {@link java.io.ObjectInputStream}) + * to serialize and deserialize, respectively, the proxy. These streams recognise javassist proxies and ensure + * that they are serialized and deserialized without the need for the proxy class to implement special methods + * such as writeReplace. Generation of the writeReplace method can be disabled globally by setting static field + * {@link ProxyFactory#useWriteReplace} to false. Alternatively, it may be + * configured per factory by calling instance method {@link ProxyFactory#setUseWriteReplace(boolean)}. + * + * @see MethodHandler + * @since 3.1 + * @author Muga Nishizawa + * @author Shigeru Chiba + * @author Andrew Dinn + */ +public class ProxyFactory { + private Class superClass; + private Class[] interfaces; + private MethodFilter methodFilter; + private MethodHandler handler; // retained for legacy usage + private List signatureMethods; + private boolean hasGetHandler; + private byte[] signature; + private String classname; + private String basename; + private String superName; + private Class thisClass; + /** + * per factory setting initialised from current setting for useCache but able to be reset before each create call + */ + private boolean factoryUseCache; + /** + * per factory setting initialised from current setting for useWriteReplace but able to be reset before each create call + */ + private boolean factoryWriteReplace; + + + /** + * If the value of this variable is not null, the class file of + * the generated proxy class is written under the directory specified + * by this variable. For example, if the value is + * ".", then the class file is written under the current + * directory. This method is for debugging. + * + *

The default value is null. + */ + public String writeDirectory; + + private static final Class OBJECT_TYPE = Object.class; + + private static final String HOLDER = "_methods_"; + private static final String HOLDER_TYPE = "[Ljava/lang/reflect/Method;"; + private static final String FILTER_SIGNATURE_FIELD = "_filter_signature"; + private static final String FILTER_SIGNATURE_TYPE = "[B"; + private static final String HANDLER = "handler"; + private static final String NULL_INTERCEPTOR_HOLDER = "javassist.util.proxy.RuntimeSupport"; + private static final String DEFAULT_INTERCEPTOR = "default_interceptor"; + private static final String HANDLER_TYPE + = 'L' + MethodHandler.class.getName().replace('.', '/') + ';'; + private static final String HANDLER_SETTER = "setHandler"; + private static final String HANDLER_SETTER_TYPE = "(" + HANDLER_TYPE + ")V"; + + private static final String HANDLER_GETTER = "getHandler"; + private static final String HANDLER_GETTER_TYPE = "()" + HANDLER_TYPE; + + private static final String SERIAL_VERSION_UID_FIELD = "serialVersionUID"; + private static final String SERIAL_VERSION_UID_TYPE = "J"; + private static final long SERIAL_VERSION_UID_VALUE = -1L; + + /** + * If true, a generated proxy class is cached and it will be reused + * when generating the proxy class with the same properties is requested. + * The default value is true. + * + * Note that this value merely specifies the initial setting employed by any newly created + * proxy factory. The factory setting may be overwritten by calling factory instance method + * {@link #setUseCache(boolean)} + * + * @since 3.4 + */ + public static volatile boolean useCache = true; + + /** + * If true, a generated proxy class will implement method writeReplace enabling + * serialization of its proxies to a conventional ObjectOutputStream. this (default) + * setting retains the old javassist behaviour which has the advantage that it + * retains compatibility with older releases and requires no extra work on the part + * of the client performing the serialization. However, it has the disadvantage that + * state inherited from the superclasses of the proxy is lost during serialization. + * if false then serialization/deserialization of the proxy instances will preserve + * all fields. However, serialization must be performed via a {@link ProxyObjectOutputStream} + * and deserialization must be via {@link ProxyObjectInputStream}. Any attempt to serialize + * proxies whose class was created with useWriteReplace set to false via a normal + * {@link java.io.ObjectOutputStream} will fail. + * + * Note that this value merely specifies the initial setting employed by any newly created + * proxy factory. The factory setting may be overwritten by calling factory instance method + * {@link #setUseWriteReplace(boolean)} + * + * @since 3.4 + */ + public static volatile boolean useWriteReplace = true; + + /* + * methods allowing individual factory settings for factoryUseCache and factoryWriteReplace to be reset + */ + + /** + * test whether this factory uses the proxy cache + * @return true if this factory uses the proxy cache otherwise false + */ + public boolean isUseCache() + { + return factoryUseCache; + } + + /** + * configure whether this factory should use the proxy cache + * @param useCache true if this factory should use the proxy cache and false if it should not use the cache + * @throws RuntimeException if a default interceptor has been set for the factory + */ + public void setUseCache(boolean useCache) + { + // we cannot allow caching to be used if the factory is configured to install a default interceptor + // field into generated classes + if (handler != null && useCache) { + throw new RuntimeException("caching cannot be enabled if the factory default interceptor has been set"); + } + factoryUseCache = useCache; + } + + /** + * test whether this factory installs a writeReplace method in created classes + * @return true if this factory installs a writeReplace method in created classes otherwise false + */ + public boolean isUseWriteReplace() + { + return factoryWriteReplace; + } + + /** + * configure whether this factory should add a writeReplace method to created classes + * @param useWriteReplace true if this factory should add a writeReplace method to created classes and false if it + * should not add a writeReplace method + */ + public void setUseWriteReplace(boolean useWriteReplace) + { + factoryWriteReplace = useWriteReplace; + } + + private static WeakHashMap proxyCache = new WeakHashMap(); + + /** + * determine if a class is a javassist proxy class + * @param cl + * @return true if the class is a javassist proxy class otherwise false + */ + public static boolean isProxyClass(Class cl) + { + // all proxies implement Proxy or ProxyObject. nothing else should. + return (Proxy.class.isAssignableFrom(cl)); + } + + /** + * used to store details of a specific proxy class in the second tier of the proxy cache. this entry + * will be located in a hashmap keyed by the unique identifying name of the proxy class. the hashmap is + * located in a weak hashmap keyed by the classloader common to all proxy classes in the second tier map. + */ + static class ProxyDetails { + /** + * the unique signature of any method filter whose behaviour will be met by this class. each bit in + * the byte array is set if the filter redirects the corresponding super or interface method and clear + * if it does not redirect it. + */ + byte[] signature; + /** + * a hexadecimal string representation of the signature bit sequence. this string also forms part + * of the proxy class name. + */ + WeakReference proxyClass; + /** + * a flag which is true this class employs writeReplace to perform serialization of its instances + * and false if serialization must employ of a ProxyObjectOutputStream and ProxyObjectInputStream + */ + boolean isUseWriteReplace; + + ProxyDetails(byte[] signature, Class proxyClass, boolean isUseWriteReplace) + { + this.signature = signature; + this.proxyClass = new WeakReference(proxyClass); + this.isUseWriteReplace = isUseWriteReplace; + } + } + + /** + * Constructs a factory of proxy class. + */ + public ProxyFactory() { + superClass = null; + interfaces = null; + methodFilter = null; + handler = null; + signature = null; + signatureMethods = null; + hasGetHandler = false; + thisClass = null; + writeDirectory = null; + factoryUseCache = useCache; + factoryWriteReplace = useWriteReplace; + } + + /** + * Sets the super class of a proxy class. + */ + public void setSuperclass(Class clazz) { + superClass = clazz; + // force recompute of signature + signature = null; + } + + /** + * Obtains the super class set by setSuperclass(). + * + * @since 3.4 + */ + public Class getSuperclass() { return superClass; } + + /** + * Sets the interfaces of a proxy class. + */ + public void setInterfaces(Class[] ifs) { + interfaces = ifs; + // force recompute of signature + signature = null; + } + + /** + * Obtains the interfaces set by setInterfaces. + * + * @since 3.4 + */ + public Class[] getInterfaces() { return interfaces; } + + /** + * Sets a filter that selects the methods that will be controlled by a handler. + */ + public void setFilter(MethodFilter mf) { + methodFilter = mf; + // force recompute of signature + signature = null; + } + + /** + * Generates a proxy class using the current filter. + */ + public Class createClass() { + if (signature == null) { + computeSignature(methodFilter); + } + return createClass1(); + } + + /** + * Generates a proxy class using the supplied filter. + */ + public Class createClass(MethodFilter filter) { + computeSignature(filter); + return createClass1(); + } + + /** + * Generates a proxy class with a specific signature. + * access is package local so ProxyObjectInputStream can use this + * @param signature + * @return + */ + Class createClass(byte[] signature) + { + installSignature(signature); + return createClass1(); + } + + private Class createClass1() { + if (thisClass == null) { + ClassLoader cl = getClassLoader(); + synchronized (proxyCache) { + if (factoryUseCache) + createClass2(cl); + else + createClass3(cl); + } + } + + // don't retain any unwanted references + Class result = thisClass; + thisClass = null; + + return result; + } + + private static char[] hexDigits = + { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; + + public String getKey(Class superClass, Class[] interfaces, byte[] signature, boolean useWriteReplace) + { + StringBuffer sbuf = new StringBuffer(); + if (superClass != null){ + sbuf.append(superClass.getName()); + } + sbuf.append(":"); + for (int i = 0; i < interfaces.length; i++) { + sbuf.append(interfaces[i].getName()); + sbuf.append(":"); + } + for (int i = 0; i < signature.length; i++) { + byte b = signature[i]; + int lo = b & 0xf; + int hi = (b >> 4) & 0xf; + sbuf.append(hexDigits[lo]); + sbuf.append(hexDigits[hi]); + } + if (useWriteReplace) { + sbuf.append(":w"); + } + + return sbuf.toString(); + } + + private void createClass2(ClassLoader cl) { + String key = getKey(superClass, interfaces, signature, factoryWriteReplace); + /* + * Excessive concurrency causes a large memory footprint and slows the + * execution speed down (with JDK 1.5). Thus, we use a jumbo lock for + * reducing concrrency. + */ + // synchronized (proxyCache) { + HashMap cacheForTheLoader = (HashMap)proxyCache.get(cl); + ProxyDetails details; + if (cacheForTheLoader == null) { + cacheForTheLoader = new HashMap(); + proxyCache.put(cl, cacheForTheLoader); + } + details = (ProxyDetails)cacheForTheLoader.get(key); + if (details != null) { + WeakReference reference = details.proxyClass; + thisClass = (Class)reference.get(); + if (thisClass != null) { + return; + } + } + createClass3(cl); + details = new ProxyDetails(signature, thisClass, factoryWriteReplace); + cacheForTheLoader.put(key, details); + // } + } + + private void createClass3(ClassLoader cl) { + // we need a new class so we need a new class name + allocateClassName(); + + try { + ClassFile cf = make(); + if (writeDirectory != null) + FactoryHelper.writeFile(cf, writeDirectory); + + thisClass = FactoryHelper.toClass(cf, cl, getDomain()); + setField(FILTER_SIGNATURE_FIELD, signature); + // legacy behaviour : we only set the default interceptor static field if we are not using the cache + if (!factoryUseCache) { + setField(DEFAULT_INTERCEPTOR, handler); + } + } + catch (CannotCompileException e) { + throw new RuntimeException(e.getMessage(), e); + } + + } + + private void setField(String fieldName, Object value) { + if (thisClass != null && value != null) + try { + Field f = thisClass.getField(fieldName); + SecurityActions.setAccessible(f, true); + f.set(null, value); + SecurityActions.setAccessible(f, false); + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + static byte[] getFilterSignature(Class clazz) { + return (byte[])getField(clazz, FILTER_SIGNATURE_FIELD); + } + + private static Object getField(Class clazz, String fieldName) { + try { + Field f = clazz.getField(fieldName); + f.setAccessible(true); + Object value = f.get(null); + f.setAccessible(false); + return value; + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * Obtains the method handler of the given proxy object. + * + * @param p a proxy object. + * @return the method handler. + * @since 3.16 + */ + public static MethodHandler getHandler(Proxy p) { + try { + Field f = p.getClass().getDeclaredField(HANDLER); + f.setAccessible(true); + Object value = f.get(p); + f.setAccessible(false); + return (MethodHandler)value; + } + catch (Exception e) { + throw new RuntimeException(e); + } + } + + /** + * A provider of class loaders. + * + * @see #classLoaderProvider + * @since 3.4 + */ + public static interface ClassLoaderProvider { + /** + * Returns a class loader. + * + * @param pf a proxy factory that is going to obtain a class loader. + */ + public ClassLoader get(ProxyFactory pf); + } + + /** + * A provider used by createClass() for obtaining + * a class loader. + * get() on this ClassLoaderProvider object + * is called to obtain a class loader. + * + *

The value of this field can be updated for changing the default + * implementation. + * + *

Example: + * 

+     * ProxyFactory.classLoaderProvider = new ProxyFactory.ClassLoaderProvider() {
+     *     public ClassLoader get(ProxyFactory pf) {
+     *         return Thread.currentThread().getContextClassLoader();
+     *     }
+     * };
+     *
+ * + * @since 3.4 + */ + public static ClassLoaderProvider classLoaderProvider + = new ClassLoaderProvider() { + public ClassLoader get(ProxyFactory pf) { + return pf.getClassLoader0(); + } + }; + + protected ClassLoader getClassLoader() { + return classLoaderProvider.get(this); + } + + protected ClassLoader getClassLoader0() { + ClassLoader loader = null; + if (superClass != null && !superClass.getName().equals("java.lang.Object")) + loader = superClass.getClassLoader(); + else if (interfaces != null && interfaces.length > 0) + loader = interfaces[0].getClassLoader(); + + if (loader == null) { + loader = getClass().getClassLoader(); + // In case javassist is in the endorsed dir + if (loader == null) { + loader = Thread.currentThread().getContextClassLoader(); + if (loader == null) + loader = ClassLoader.getSystemClassLoader(); + } + } + + return loader; + } + + protected ProtectionDomain getDomain() { + Class clazz; + if (superClass != null && !superClass.getName().equals("java.lang.Object")) + clazz = superClass; + else if (interfaces != null && interfaces.length > 0) + clazz = interfaces[0]; + else + clazz = this.getClass(); + + return clazz.getProtectionDomain(); + } + + /** + * Creates a proxy class and returns an instance of that class. + * + * @param paramTypes parameter types for a constructor. + * @param args arguments passed to a constructor. + * @param mh the method handler for the proxy class. + * @since 3.4 + */ + public Object create(Class[] paramTypes, Object[] args, MethodHandler mh) + throws NoSuchMethodException, IllegalArgumentException, + InstantiationException, IllegalAccessException, InvocationTargetException + { + Object obj = create(paramTypes, args); + ((Proxy)obj).setHandler(mh); + return obj; + } + + /** + * Creates a proxy class and returns an instance of that class. + * + * @param paramTypes parameter types for a constructor. + * @param args arguments passed to a constructor. + */ + public Object create(Class[] paramTypes, Object[] args) + throws NoSuchMethodException, IllegalArgumentException, + InstantiationException, IllegalAccessException, InvocationTargetException + { + Class c = createClass(); + Constructor cons = c.getConstructor(paramTypes); + return cons.newInstance(args); + } + + /** + * Sets the default invocation handler. This invocation handler is shared + * among all the instances of a proxy class unless another is explicitly + * specified. + * @deprecated since 3.12 + * use of this method is incompatible with proxy class caching. + * instead clients should call method {@link Proxy#setHandler(MethodHandler)} to set the handler + * for each newly created proxy instance. + * calling this method will automatically disable caching of classes created by the proxy factory. + */ + public void setHandler(MethodHandler mi) { + // if we were using the cache and the handler is non-null then we must stop caching + if (factoryUseCache && mi != null) { + factoryUseCache = false; + // clear any currently held class so we don't try to reuse it or set its handler field + thisClass = null; + } + handler = mi; + // this retains the behaviour of the old code which resets any class we were holding on to + // this is probably not what is wanted + setField(DEFAULT_INTERCEPTOR, handler); + } + + /** + * A unique class name generator. + */ + public static interface UniqueName { + /** + * Returns a unique class name. + * + * @param classname the super class name of the proxy class. + */ + String get(String classname); + } + + /** + * A unique class name generator. + * Replacing this generator changes the algorithm to generate a + * unique name. The get method does not have to be + * a synchronized method since the access to this field + * is mutually exclusive and thus thread safe. + */ + public static UniqueName nameGenerator = new UniqueName() { + private final String sep = "_$$_jvst" + Integer.toHexString(this.hashCode() & 0xfff) + "_"; + private int counter = 0; + + public String get(String classname) { + return classname + sep + Integer.toHexString(counter++); + } + }; + + private static String makeProxyName(String classname) { + synchronized (nameGenerator) { + return nameGenerator.get(classname); + } + } + + private ClassFile make() throws CannotCompileException { + ClassFile cf = new ClassFile(false, classname, superName); + cf.setAccessFlags(AccessFlag.PUBLIC); + setInterfaces(cf, interfaces, hasGetHandler ? Proxy.class : ProxyObject.class); + ConstPool pool = cf.getConstPool(); + + // legacy: we only add the static field for the default interceptor if caching is disabled + if (!factoryUseCache) { + FieldInfo finfo = new FieldInfo(pool, DEFAULT_INTERCEPTOR, HANDLER_TYPE); + finfo.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC); + cf.addField(finfo); + } + + // handler is per instance + FieldInfo finfo2 = new FieldInfo(pool, HANDLER, HANDLER_TYPE); + finfo2.setAccessFlags(AccessFlag.PRIVATE); + cf.addField(finfo2); + + // filter signature is per class + FieldInfo finfo3 = new FieldInfo(pool, FILTER_SIGNATURE_FIELD, FILTER_SIGNATURE_TYPE); + finfo3.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC); + cf.addField(finfo3); + + // the proxy class serial uid must always be a fixed value + FieldInfo finfo4 = new FieldInfo(pool, SERIAL_VERSION_UID_FIELD, SERIAL_VERSION_UID_TYPE); + finfo4.setAccessFlags(AccessFlag.PUBLIC | AccessFlag.STATIC| AccessFlag.FINAL); + cf.addField(finfo4); + + // HashMap allMethods = getMethods(superClass, interfaces); + // int size = allMethods.size(); + makeConstructors(classname, cf, pool, classname); + + ArrayList forwarders = new ArrayList(); + int s = overrideMethods(cf, pool, classname, forwarders); + addClassInitializer(cf, pool, classname, s, forwarders); + addSetter(classname, cf, pool); + if (!hasGetHandler) + addGetter(classname, cf, pool); + + if (factoryWriteReplace) { + try { + cf.addMethod(makeWriteReplace(pool)); + } + catch (DuplicateMemberException e) { + // writeReplace() is already declared in the super class/interfaces. + } + } + + thisClass = null; + return cf; + } + + private void checkClassAndSuperName() { + if (interfaces == null) + interfaces = new Class[0]; + + if (superClass == null) { + superClass = OBJECT_TYPE; + superName = superClass.getName(); + basename = interfaces.length == 0 ? superName + : interfaces[0].getName(); + } else { + superName = superClass.getName(); + basename = superName; + } + + if (Modifier.isFinal(superClass.getModifiers())) + throw new RuntimeException(superName + " is final"); + + if (basename.startsWith("java.")) + basename = "org.javassist.tmp." + basename; + } + + private void allocateClassName() { + classname = makeProxyName(basename); + } + + private static Comparator sorter = new Comparator() { + + public int compare(Object o1, Object o2) { + Map.Entry e1 = (Map.Entry)o1; + Map.Entry e2 = (Map.Entry)o2; + String key1 = (String)e1.getKey(); + String key2 = (String)e2.getKey(); + return key1.compareTo(key2); + } + }; + + private void makeSortedMethodList() { + checkClassAndSuperName(); + + hasGetHandler = false; // getMethods() may set this to true. + HashMap allMethods = getMethods(superClass, interfaces); + signatureMethods = new ArrayList(allMethods.entrySet()); + Collections.sort(signatureMethods, sorter); + } + + private void computeSignature(MethodFilter filter) // throws CannotCompileException + { + makeSortedMethodList(); + + int l = signatureMethods.size(); + int maxBytes = ((l + 7) >> 3); + signature = new byte[maxBytes]; + for (int idx = 0; idx < l; idx++) + { + Map.Entry e = (Map.Entry)signatureMethods.get(idx); + Method m = (Method)e.getValue(); + int mod = m.getModifiers(); + if (!Modifier.isFinal(mod) && !Modifier.isStatic(mod) + && isVisible(mod, basename, m) && (filter == null || filter.isHandled(m))) { + setBit(signature, idx); + } + } + } + + private void installSignature(byte[] signature) // throws CannotCompileException + { + makeSortedMethodList(); + + int l = signatureMethods.size(); + int maxBytes = ((l + 7) >> 3); + if (signature.length != maxBytes) { + throw new RuntimeException("invalid filter signature length for deserialized proxy class"); + } + + this.signature = signature; + } + + private boolean testBit(byte[] signature, int idx) { + int byteIdx = idx >> 3; + if (byteIdx > signature.length) { + return false; + } else { + int bitIdx = idx & 0x7; + int mask = 0x1 << bitIdx; + int sigByte = signature[byteIdx]; + return ((sigByte & mask) != 0); + } + } + + private void setBit(byte[] signature, int idx) { + int byteIdx = idx >> 3; + if (byteIdx < signature.length) { + int bitIdx = idx & 0x7; + int mask = 0x1 << bitIdx; + int sigByte = signature[byteIdx]; + signature[byteIdx] = (byte)(sigByte | mask); + } + } + + private static void setInterfaces(ClassFile cf, Class[] interfaces, Class proxyClass) { + String setterIntf = proxyClass.getName(); + String[] list; + if (interfaces == null || interfaces.length == 0) + list = new String[] { setterIntf }; + else { + list = new String[interfaces.length + 1]; + for (int i = 0; i < interfaces.length; i++) + list[i] = interfaces[i].getName(); + + list[interfaces.length] = setterIntf; + } + + cf.setInterfaces(list); + } + + private static void addClassInitializer(ClassFile cf, ConstPool cp, + String classname, int size, ArrayList forwarders) + throws CannotCompileException + { + FieldInfo finfo = new FieldInfo(cp, HOLDER, HOLDER_TYPE); + finfo.setAccessFlags(AccessFlag.PRIVATE | AccessFlag.STATIC); + cf.addField(finfo); + MethodInfo minfo = new MethodInfo(cp, "", "()V"); + minfo.setAccessFlags(AccessFlag.STATIC); + setThrows(minfo, cp, new Class[] { ClassNotFoundException.class }); + + Bytecode code = new Bytecode(cp, 0, 2); + code.addIconst(size * 2); + code.addAnewarray("java.lang.reflect.Method"); + final int varArray = 0; + code.addAstore(varArray); + + // forName() must be called here. Otherwise, the class might be + // invisible. + code.addLdc(classname); + code.addInvokestatic("java.lang.Class", + "forName", "(Ljava/lang/String;)Ljava/lang/Class;"); + final int varClass = 1; + code.addAstore(varClass); + + Iterator it = forwarders.iterator(); + while (it.hasNext()) { + Find2MethodsArgs args = (Find2MethodsArgs)it.next(); + callFind2Methods(code, args.methodName, args.delegatorName, + args.origIndex, args.descriptor, varClass, varArray); + } + + code.addAload(varArray); + code.addPutstatic(classname, HOLDER, HOLDER_TYPE); + + code.addLconst(SERIAL_VERSION_UID_VALUE); + code.addPutstatic(classname, SERIAL_VERSION_UID_FIELD, SERIAL_VERSION_UID_TYPE); + code.addOpcode(Bytecode.RETURN); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + } + + /** + * @param thisMethod might be null. + */ + private static void callFind2Methods(Bytecode code, String superMethod, String thisMethod, + int index, String desc, int classVar, int arrayVar) { + String findClass = RuntimeSupport.class.getName(); + String findDesc + = "(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/reflect/Method;)V"; + + code.addAload(classVar); + code.addLdc(superMethod); + if (thisMethod == null) + code.addOpcode(Opcode.ACONST_NULL); + else + code.addLdc(thisMethod); + + code.addIconst(index); + code.addLdc(desc); + code.addAload(arrayVar); + code.addInvokestatic(findClass, "find2Methods", findDesc); + } + + private static void addSetter(String classname, ClassFile cf, ConstPool cp) + throws CannotCompileException + { + MethodInfo minfo = new MethodInfo(cp, HANDLER_SETTER, + HANDLER_SETTER_TYPE); + minfo.setAccessFlags(AccessFlag.PUBLIC); + Bytecode code = new Bytecode(cp, 2, 2); + code.addAload(0); + code.addAload(1); + code.addPutfield(classname, HANDLER, HANDLER_TYPE); + code.addOpcode(Bytecode.RETURN); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + } + + private static void addGetter(String classname, ClassFile cf, ConstPool cp) + throws CannotCompileException + { + MethodInfo minfo = new MethodInfo(cp, HANDLER_GETTER, + HANDLER_GETTER_TYPE); + minfo.setAccessFlags(AccessFlag.PUBLIC); + Bytecode code = new Bytecode(cp, 1, 1); + code.addAload(0); + code.addGetfield(classname, HANDLER, HANDLER_TYPE); + code.addOpcode(Bytecode.ARETURN); + minfo.setCodeAttribute(code.toCodeAttribute()); + cf.addMethod(minfo); + } + + private int overrideMethods(ClassFile cf, ConstPool cp, String className, ArrayList forwarders) + throws CannotCompileException + { + String prefix = makeUniqueName("_d", signatureMethods); + Iterator it = signatureMethods.iterator(); + int index = 0; + while (it.hasNext()) { + Map.Entry e = (Map.Entry)it.next(); + String key = (String)e.getKey(); + Method meth = (Method)e.getValue(); + if (ClassFile.MAJOR_VERSION < ClassFile.JAVA_5 || !isBridge(meth)) + if (testBit(signature, index)) { + override(className, meth, prefix, index, + keyToDesc(key, meth), cf, cp, forwarders); + } + + index++; + } + + return index; + } + + private static boolean isBridge(Method m) { + return m.isBridge(); + } + + private void override(String thisClassname, Method meth, String prefix, + int index, String desc, ClassFile cf, ConstPool cp, ArrayList forwarders) + throws CannotCompileException + { + Class declClass = meth.getDeclaringClass(); + String delegatorName = prefix + index + meth.getName(); + if (Modifier.isAbstract(meth.getModifiers())) + delegatorName = null; + else { + MethodInfo delegator + = makeDelegator(meth, desc, cp, declClass, delegatorName); + // delegator is not a bridge method. See Sec. 15.12.4.5 of JLS 3rd Ed. + delegator.setAccessFlags(delegator.getAccessFlags() & ~AccessFlag.BRIDGE); + cf.addMethod(delegator); + } + + MethodInfo forwarder + = makeForwarder(thisClassname, meth, desc, cp, declClass, + delegatorName, index, forwarders); + cf.addMethod(forwarder); + } + + private void makeConstructors(String thisClassName, ClassFile cf, + ConstPool cp, String classname) throws CannotCompileException + { + Constructor[] cons = SecurityActions.getDeclaredConstructors(superClass); + // legacy: if we are not caching then we need to initialise the default handler + boolean doHandlerInit = !factoryUseCache; + for (int i = 0; i < cons.length; i++) { + Constructor c = cons[i]; + int mod = c.getModifiers(); + if (!Modifier.isFinal(mod) && !Modifier.isPrivate(mod) + && isVisible(mod, basename, c)) { + MethodInfo m = makeConstructor(thisClassName, c, cp, superClass, doHandlerInit); + cf.addMethod(m); + } + } + } + + private static String makeUniqueName(String name, List sortedMethods) { + if (makeUniqueName0(name, sortedMethods.iterator())) + return name; + + for (int i = 100; i < 999; i++) { + String s = name + i; + if (makeUniqueName0(s, sortedMethods.iterator())) + return s; + } + + throw new RuntimeException("cannot make a unique method name"); + } + + private static boolean makeUniqueName0(String name, Iterator it) { + while (it.hasNext()) { + Map.Entry e = (Map.Entry)it.next(); + String key = (String)e.getKey(); + if (key.startsWith(name)) + return false; + } + + return true; + } + + /** + * Returns true if the method is visible from the package. + * + * @param mod the modifiers of the method. + */ + private static boolean isVisible(int mod, String from, Member meth) { + if ((mod & Modifier.PRIVATE) != 0) + return false; + else if ((mod & (Modifier.PUBLIC | Modifier.PROTECTED)) != 0) + return true; + else { + String p = getPackageName(from); + String q = getPackageName(meth.getDeclaringClass().getName()); + if (p == null) + return q == null; + else + return p.equals(q); + } + } + + private static String getPackageName(String name) { + int i = name.lastIndexOf('.'); + if (i < 0) + return null; + else + return name.substring(0, i); + } + + /* getMethods() may set hasGetHandler to true. + */ + private HashMap getMethods(Class superClass, Class[] interfaceTypes) { + HashMap hash = new HashMap(); + HashSet set = new HashSet(); + for (int i = 0; i < interfaceTypes.length; i++) + getMethods(hash, interfaceTypes[i], set); + + getMethods(hash, superClass, set); + return hash; + } + + private void getMethods(HashMap hash, Class clazz, Set visitedClasses) { + // This both speeds up scanning by avoiding duplicate interfaces and is needed to + // ensure that superinterfaces are always scanned before subinterfaces. + if (!visitedClasses.add(clazz)) + return; + + Class[] ifs = clazz.getInterfaces(); + for (int i = 0; i < ifs.length; i++) + getMethods(hash, ifs[i], visitedClasses); + + Class parent = clazz.getSuperclass(); + if (parent != null) + getMethods(hash, parent, visitedClasses); + + /* Java 5 or later allows covariant return types. + * It also allows contra-variant parameter types + * if a super class is a generics with concrete type arguments + * such as Foo. So the method-overriding rule is complex. + */ + Method[] methods = SecurityActions.getDeclaredMethods(clazz); + for (int i = 0; i < methods.length; i++) + if (!Modifier.isPrivate(methods[i].getModifiers())) { + Method m = methods[i]; + String key = m.getName() + ':' + RuntimeSupport.makeDescriptor(m); // see keyToDesc(). + if (key.startsWith(HANDLER_GETTER_KEY)) + hasGetHandler = true; + + // JIRA JASSIST-85 + // put the method to the cache, retrieve previous definition (if any) + Method oldMethod = (Method)hash.put(key, methods[i]); + + // check if visibility has been reduced + if (null != oldMethod && Modifier.isPublic(oldMethod.getModifiers()) + && !Modifier.isPublic(methods[i].getModifiers()) ) { + // we tried to overwrite a public definition with a non-public definition, + // use the old definition instead. + hash.put(key, oldMethod); + } + } + } + + private static final String HANDLER_GETTER_KEY + = HANDLER_GETTER + ":()"; + + private static String keyToDesc(String key, Method m) { + return key.substring(key.indexOf(':') + 1); + } + + private static MethodInfo makeConstructor(String thisClassName, Constructor cons, + ConstPool cp, Class superClass, boolean doHandlerInit) { + String desc = RuntimeSupport.makeDescriptor(cons.getParameterTypes(), + Void.TYPE); + MethodInfo minfo = new MethodInfo(cp, "", desc); + minfo.setAccessFlags(Modifier.PUBLIC); // cons.getModifiers() & ~Modifier.NATIVE + setThrows(minfo, cp, cons.getExceptionTypes()); + Bytecode code = new Bytecode(cp, 0, 0); + + // legacy: if we are not using caching then we initialise the instance's handler + // from the class's static default interceptor and skip the next few instructions if + // it is non-null + if (doHandlerInit) { + code.addAload(0); + code.addGetstatic(thisClassName, DEFAULT_INTERCEPTOR, HANDLER_TYPE); + code.addPutfield(thisClassName, HANDLER, HANDLER_TYPE); + code.addGetstatic(thisClassName, DEFAULT_INTERCEPTOR, HANDLER_TYPE); + code.addOpcode(Opcode.IFNONNULL); + code.addIndex(10); + } + // if caching is enabled then we don't have a handler to initialise so this else branch will install + // the handler located in the static field of class RuntimeSupport. + code.addAload(0); + code.addGetstatic(NULL_INTERCEPTOR_HOLDER, DEFAULT_INTERCEPTOR, HANDLER_TYPE); + code.addPutfield(thisClassName, HANDLER, HANDLER_TYPE); + int pc = code.currentPc(); + + code.addAload(0); + int s = addLoadParameters(code, cons.getParameterTypes(), 1); + code.addInvokespecial(superClass.getName(), "", desc); + code.addOpcode(Opcode.RETURN); + code.setMaxLocals(s + 1); + CodeAttribute ca = code.toCodeAttribute(); + minfo.setCodeAttribute(ca); + + StackMapTable.Writer writer = new StackMapTable.Writer(32); + writer.sameFrame(pc); + ca.setAttribute(writer.toStackMapTable(cp)); + return minfo; + } + + private static MethodInfo makeDelegator(Method meth, String desc, + ConstPool cp, Class declClass, String delegatorName) { + MethodInfo delegator = new MethodInfo(cp, delegatorName, desc); + delegator.setAccessFlags(Modifier.FINAL | Modifier.PUBLIC + | (meth.getModifiers() & ~(Modifier.PRIVATE + | Modifier.PROTECTED + | Modifier.ABSTRACT + | Modifier.NATIVE + | Modifier.SYNCHRONIZED))); + setThrows(delegator, cp, meth); + Bytecode code = new Bytecode(cp, 0, 0); + code.addAload(0); + int s = addLoadParameters(code, meth.getParameterTypes(), 1); + code.addInvokespecial(declClass.getName(), meth.getName(), desc); + addReturn(code, meth.getReturnType()); + code.setMaxLocals(++s); + delegator.setCodeAttribute(code.toCodeAttribute()); + return delegator; + } + + /** + * @param delegatorName null if the original method is abstract. + */ + private static MethodInfo makeForwarder(String thisClassName, + Method meth, String desc, ConstPool cp, + Class declClass, String delegatorName, int index, + ArrayList forwarders) { + MethodInfo forwarder = new MethodInfo(cp, meth.getName(), desc); + forwarder.setAccessFlags(Modifier.FINAL + | (meth.getModifiers() & ~(Modifier.ABSTRACT + | Modifier.NATIVE + | Modifier.SYNCHRONIZED))); + setThrows(forwarder, cp, meth); + int args = Descriptor.paramSize(desc); + Bytecode code = new Bytecode(cp, 0, args + 2); + /* + * static { + * methods[index * 2] + * = RuntimeSupport.findSuperMethod(this, , ); + * methods[index * 2 + 1] + * = RuntimeSupport.findMethod(this, , ); + * or = null // the original method is abstract. + * } + * : + * return ($r)handler.invoke(this, methods[index * 2], + * methods[index * 2 + 1], $args); + */ + int origIndex = index * 2; + int delIndex = index * 2 + 1; + int arrayVar = args + 1; + code.addGetstatic(thisClassName, HOLDER, HOLDER_TYPE); + code.addAstore(arrayVar); + + forwarders.add(new Find2MethodsArgs(meth.getName(), delegatorName, desc, origIndex)); + + code.addAload(0); + code.addGetfield(thisClassName, HANDLER, HANDLER_TYPE); + code.addAload(0); + + code.addAload(arrayVar); + code.addIconst(origIndex); + code.addOpcode(Opcode.AALOAD); + + code.addAload(arrayVar); + code.addIconst(delIndex); + code.addOpcode(Opcode.AALOAD); + + makeParameterList(code, meth.getParameterTypes()); + code.addInvokeinterface(MethodHandler.class.getName(), "invoke", + "(Ljava/lang/Object;Ljava/lang/reflect/Method;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;", + 5); + Class retType = meth.getReturnType(); + addUnwrapper(code, retType); + addReturn(code, retType); + + CodeAttribute ca = code.toCodeAttribute(); + forwarder.setCodeAttribute(ca); + return forwarder; + } + + static class Find2MethodsArgs { + String methodName, delegatorName, descriptor; + int origIndex; + + Find2MethodsArgs(String mname, String dname, String desc, int index) { + methodName = mname; + delegatorName = dname; + descriptor = desc; + origIndex = index; + } + } + + private static void setThrows(MethodInfo minfo, ConstPool cp, Method orig) { + Class[] exceptions = orig.getExceptionTypes(); + setThrows(minfo, cp, exceptions); + } + + private static void setThrows(MethodInfo minfo, ConstPool cp, + Class[] exceptions) { + if (exceptions.length == 0) + return; + + String[] list = new String[exceptions.length]; + for (int i = 0; i < exceptions.length; i++) + list[i] = exceptions[i].getName(); + + ExceptionsAttribute ea = new ExceptionsAttribute(cp); + ea.setExceptions(list); + minfo.setExceptionsAttribute(ea); + } + + private static int addLoadParameters(Bytecode code, Class[] params, + int offset) { + int stacksize = 0; + int n = params.length; + for (int i = 0; i < n; ++i) + stacksize += addLoad(code, stacksize + offset, params[i]); + + return stacksize; + } + + private static int addLoad(Bytecode code, int n, Class type) { + if (type.isPrimitive()) { + if (type == Long.TYPE) { + code.addLload(n); + return 2; + } + else if (type == Float.TYPE) + code.addFload(n); + else if (type == Double.TYPE) { + code.addDload(n); + return 2; + } + else + code.addIload(n); + } + else + code.addAload(n); + + return 1; + } + + private static int addReturn(Bytecode code, Class type) { + if (type.isPrimitive()) { + if (type == Long.TYPE) { + code.addOpcode(Opcode.LRETURN); + return 2; + } + else if (type == Float.TYPE) + code.addOpcode(Opcode.FRETURN); + else if (type == Double.TYPE) { + code.addOpcode(Opcode.DRETURN); + return 2; + } + else if (type == Void.TYPE) { + code.addOpcode(Opcode.RETURN); + return 0; + } + else + code.addOpcode(Opcode.IRETURN); + } + else + code.addOpcode(Opcode.ARETURN); + + return 1; + } + + private static void makeParameterList(Bytecode code, Class[] params) { + int regno = 1; + int n = params.length; + code.addIconst(n); + code.addAnewarray("java/lang/Object"); + for (int i = 0; i < n; i++) { + code.addOpcode(Opcode.DUP); + code.addIconst(i); + Class type = params[i]; + if (type.isPrimitive()) + regno = makeWrapper(code, type, regno); + else { + code.addAload(regno); + regno++; + } + + code.addOpcode(Opcode.AASTORE); + } + } + + private static int makeWrapper(Bytecode code, Class type, int regno) { + int index = FactoryHelper.typeIndex(type); + String wrapper = FactoryHelper.wrapperTypes[index]; + code.addNew(wrapper); + code.addOpcode(Opcode.DUP); + addLoad(code, regno, type); + code.addInvokespecial(wrapper, "", + FactoryHelper.wrapperDesc[index]); + return regno + FactoryHelper.dataSize[index]; + } + + private static void addUnwrapper(Bytecode code, Class type) { + if (type.isPrimitive()) { + if (type == Void.TYPE) + code.addOpcode(Opcode.POP); + else { + int index = FactoryHelper.typeIndex(type); + String wrapper = FactoryHelper.wrapperTypes[index]; + code.addCheckcast(wrapper); + code.addInvokevirtual(wrapper, + FactoryHelper.unwarpMethods[index], + FactoryHelper.unwrapDesc[index]); + } + } + else + code.addCheckcast(type.getName()); + } + + private static MethodInfo makeWriteReplace(ConstPool cp) { + MethodInfo minfo = new MethodInfo(cp, "writeReplace", "()Ljava/lang/Object;"); + String[] list = new String[1]; + list[0] = "java.io.ObjectStreamException"; + ExceptionsAttribute ea = new ExceptionsAttribute(cp); + ea.setExceptions(list); + minfo.setExceptionsAttribute(ea); + Bytecode code = new Bytecode(cp, 0, 1); + code.addAload(0); + code.addInvokestatic("javassist.util.proxy.RuntimeSupport", + "makeSerializedProxy", + "(Ljava/lang/Object;)Ljavassist/util/proxy/SerializedProxy;"); + code.addOpcode(Opcode.ARETURN); + minfo.setCodeAttribute(code.toCodeAttribute()); + return minfo; + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java new file mode 100644 index 0000000..59f8f8b --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java @@ -0,0 +1,44 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +/** + * The interface implemented by proxy classes. + * This interface is available only if the super class of the proxy object + * does not have a getHandler() method. If the super class + * has getHandler, then Proxy interface is + * available. + * + * @see ProxyFactory + * @see Proxy + */ +public interface ProxyObject extends Proxy { + /** + * Sets a handler. It can be used for changing handlers + * during runtime. + */ + void setHandler(MethodHandler mi); + + /** + * Get the handler. + * This can be used to access the underlying MethodHandler + * or to serialize it properly. + * + * @see ProxyFactory#getHandler(Proxy) + */ + MethodHandler getHandler(); +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java new file mode 100644 index 0000000..ee81e88 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java @@ -0,0 +1,100 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.io.IOException; +import java.io.InputStream; +import java.io.ObjectInputStream; +import java.io.ObjectStreamClass; + +/** + * An input stream class which knows how to deserialize proxies created via {@link ProxyFactory} and + * serializedo via a {@link ProxyObjectOutputStream}. It must be used when deserialising proxies created + * from a proxy factory configured with {@link ProxyFactory#useWriteReplace} set to false. + * + * @author Andrew Dinn + */ +public class ProxyObjectInputStream extends ObjectInputStream +{ + /** + * create an input stream which can be used to deserialize an object graph which includes proxies created + * using class ProxyFactory. the classloader used to resolve proxy superclass and interface names + * read from the input stream will default to the current thread's context class loader or the system + * classloader if the context class loader is null. + * @param in + * @throws java.io.StreamCorruptedException whenever ObjectInputStream would also do so + * @throws IOException whenever ObjectInputStream would also do so + * @throws SecurityException whenever ObjectInputStream would also do so + * @throws NullPointerException if in is null + */ + public ProxyObjectInputStream(InputStream in) throws IOException + { + super(in); + loader = Thread.currentThread().getContextClassLoader(); + if (loader == null) { + loader = ClassLoader.getSystemClassLoader(); + } + } + + /** + * Reset the loader to be + * @param loader + */ + public void setClassLoader(ClassLoader loader) + { + if (loader != null) { + this.loader = loader; + } else { + loader = ClassLoader.getSystemClassLoader(); + } + } + + protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException { + boolean isProxy = readBoolean(); + if (isProxy) { + String name = (String)readObject(); + Class superClass = loader.loadClass(name); + int length = readInt(); + Class[] interfaces = new Class[length]; + for (int i = 0; i < length; i++) { + name = (String)readObject(); + interfaces[i] = loader.loadClass(name); + } + length = readInt(); + byte[] signature = new byte[length]; + read(signature); + ProxyFactory factory = new ProxyFactory(); + // we must always use the cache and never use writeReplace when using + // ProxyObjectOutputStream and ProxyObjectInputStream + factory.setUseCache(true); + factory.setUseWriteReplace(false); + factory.setSuperclass(superClass); + factory.setInterfaces(interfaces); + Class proxyClass = factory.createClass(signature); + return ObjectStreamClass.lookup(proxyClass); + } else { + return super.readClassDescriptor(); + } + } + + /** + * the loader to use to resolve classes for proxy superclass and interface names read + * from the stream. defaults to the context class loader of the thread which creates + * the input stream or the system class loader if the context class loader is null. + */ + private ClassLoader loader; +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java new file mode 100644 index 0000000..84ac6cb --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java @@ -0,0 +1,72 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.io.IOException; +import java.io.ObjectOutputStream; +import java.io.ObjectStreamClass; +import java.io.OutputStream; + +/** + * An input stream class which knows how to serialize proxies created via {@link ProxyFactory}. It must + * be used when serialising proxies created from a proxy factory configured with + * {@link ProxyFactory#useWriteReplace} set to false. Subsequent deserialization of the serialized data + * must employ a {@link ProxyObjectInputStream} + * + * @author Andrew Dinn + */ +public class ProxyObjectOutputStream extends ObjectOutputStream +{ + /** + * create an output stream which can be used to serialize an object graph which includes proxies created + * using class ProxyFactory + * @param out + * @throws IOException whenever ObjectOutputStream would also do so + * @throws SecurityException whenever ObjectOutputStream would also do so + * @throws NullPointerException if out is null + */ + public ProxyObjectOutputStream(OutputStream out) throws IOException + { + super(out); + } + + protected void writeClassDescriptor(ObjectStreamClass desc) throws IOException { + Class cl = desc.forClass(); + if (ProxyFactory.isProxyClass(cl)) { + writeBoolean(true); + Class superClass = cl.getSuperclass(); + Class[] interfaces = cl.getInterfaces(); + byte[] signature = ProxyFactory.getFilterSignature(cl); + String name = superClass.getName(); + writeObject(name); + // we don't write the marker interface ProxyObject + writeInt(interfaces.length - 1); + for (int i = 0; i < interfaces.length; i++) { + Class interfaze = interfaces[i]; + if (interfaze != ProxyObject.class && interfaze != Proxy.class) { + name = interfaces[i].getName(); + writeObject(name); + } + } + writeInt(signature.length); + write(signature); + } else { + writeBoolean(false); + super.writeClassDescriptor(desc); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java new file mode 100644 index 0000000..9f4bbf5 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java @@ -0,0 +1,271 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.Method; +import java.io.Serializable; + +/** + * Runtime support routines that the classes generated by ProxyFactory use. + * + * @see ProxyFactory + */ +public class RuntimeSupport { + /** + * A method handler that only executes a method. + */ + public static MethodHandler default_interceptor = new DefaultMethodHandler(); + + static class DefaultMethodHandler implements MethodHandler, Serializable { + public Object invoke(Object self, Method m, + Method proceed, Object[] args) + throws Exception + { + return proceed.invoke(self, args); + } + }; + + /** + * Finds two methods specified by the parameters and stores them + * into the given array. + * + * @throws RuntimeException if the methods are not found. + * @see javassist.util.proxy.ProxyFactory + */ + public static void find2Methods(Class clazz, String superMethod, + String thisMethod, int index, + String desc, java.lang.reflect.Method[] methods) + { + methods[index + 1] = thisMethod == null ? null + : findMethod(clazz, thisMethod, desc); + methods[index] = findSuperClassMethod(clazz, superMethod, desc); + } + + /** + * Finds two methods specified by the parameters and stores them + * into the given array. + * + *

Added back for JBoss Seam. See JASSIST-206.

+ * + * @throws RuntimeException if the methods are not found. + * @see javassist.util.proxy.ProxyFactory + * @deprecated replaced by {@link #find2Methods(Class, String, String, int, String, Method[])} + */ + public static void find2Methods(Object self, String superMethod, + String thisMethod, int index, + String desc, java.lang.reflect.Method[] methods) + { + methods[index + 1] = thisMethod == null ? null + : findMethod(self, thisMethod, desc); + methods[index] = findSuperMethod(self, superMethod, desc); + } + + /** + * Finds a method with the given name and descriptor. + * It searches only the class of self. + * + *

Added back for JBoss Seam. See JASSIST-206.

+ * + * @throws RuntimeException if the method is not found. + * @deprecated replaced by {@link #findMethod(Class, String, String)} + */ + public static Method findMethod(Object self, String name, String desc) { + Method m = findMethod2(self.getClass(), name, desc); + if (m == null) + error(self.getClass(), name, desc); + + return m; + } + + /** + * Finds a method with the given name and descriptor. + * It searches only the class of self. + * + * @throws RuntimeException if the method is not found. + */ + public static Method findMethod(Class clazz, String name, String desc) { + Method m = findMethod2(clazz, name, desc); + if (m == null) + error(clazz, name, desc); + + return m; + } + + /** + * Finds a method that has the given name and descriptor and is declared + * in the super class. + * + * @throws RuntimeException if the method is not found. + */ + public static Method findSuperMethod(Object self, String name, String desc) { + // for JBoss Seam. See JASSIST-183. + Class clazz = self.getClass(); + return findSuperClassMethod(clazz, name, desc); + } + + /** + * Finds a method that has the given name and descriptor and is declared + * in the super class. + * + * @throws RuntimeException if the method is not found. + */ + public static Method findSuperClassMethod(Class clazz, String name, String desc) { + Method m = findSuperMethod2(clazz.getSuperclass(), name, desc); + if (m == null) + m = searchInterfaces(clazz, name, desc); + + if (m == null) + error(clazz, name, desc); + + return m; + } + + private static void error(Class clazz, String name, String desc) { + throw new RuntimeException("not found " + name + ":" + desc + + " in " + clazz.getName()); + } + + private static Method findSuperMethod2(Class clazz, String name, String desc) { + Method m = findMethod2(clazz, name, desc); + if (m != null) + return m; + + Class superClass = clazz.getSuperclass(); + if (superClass != null) { + m = findSuperMethod2(superClass, name, desc); + if (m != null) + return m; + } + + return searchInterfaces(clazz, name, desc); + } + + private static Method searchInterfaces(Class clazz, String name, String desc) { + Method m = null; + Class[] interfaces = clazz.getInterfaces(); + for (int i = 0; i < interfaces.length; i++) { + m = findSuperMethod2(interfaces[i], name, desc); + if (m != null) + return m; + } + + return m; + } + + private static Method findMethod2(Class clazz, String name, String desc) { + Method[] methods = SecurityActions.getDeclaredMethods(clazz); + int n = methods.length; + for (int i = 0; i < n; i++) + if (methods[i].getName().equals(name) + && makeDescriptor(methods[i]).equals(desc)) + return methods[i]; + + return null; + } + + /** + * Makes a descriptor for a given method. + */ + public static String makeDescriptor(Method m) { + Class[] params = m.getParameterTypes(); + return makeDescriptor(params, m.getReturnType()); + } + + /** + * Makes a descriptor for a given method. + * + * @param params parameter types. + * @param retType return type. + */ + public static String makeDescriptor(Class[] params, Class retType) { + StringBuffer sbuf = new StringBuffer(); + sbuf.append('('); + for (int i = 0; i < params.length; i++) + makeDesc(sbuf, params[i]); + + sbuf.append(')'); + if (retType != null) + makeDesc(sbuf, retType); + + return sbuf.toString(); + } + + /** + * Makes a descriptor for a given method. + * + * @param params the descriptor of parameter types. + * @param retType return type. + */ + public static String makeDescriptor(String params, Class retType) { + StringBuffer sbuf = new StringBuffer(params); + makeDesc(sbuf, retType); + return sbuf.toString(); + } + + private static void makeDesc(StringBuffer sbuf, Class type) { + if (type.isArray()) { + sbuf.append('['); + makeDesc(sbuf, type.getComponentType()); + } + else if (type.isPrimitive()) { + if (type == Void.TYPE) + sbuf.append('V'); + else if (type == Integer.TYPE) + sbuf.append('I'); + else if (type == Byte.TYPE) + sbuf.append('B'); + else if (type == Long.TYPE) + sbuf.append('J'); + else if (type == Double.TYPE) + sbuf.append('D'); + else if (type == Float.TYPE) + sbuf.append('F'); + else if (type == Character.TYPE) + sbuf.append('C'); + else if (type == Short.TYPE) + sbuf.append('S'); + else if (type == Boolean.TYPE) + sbuf.append('Z'); + else + throw new RuntimeException("bad type: " + type.getName()); + } + else + sbuf.append('L').append(type.getName().replace('.', '/')) + .append(';'); + } + + /** + * Converts a proxy object to an object that is writable to an + * object stream. This method is called by writeReplace() + * in a proxy class. + * + * @since 3.4 + */ + public static SerializedProxy makeSerializedProxy(Object proxy) + throws java.io.InvalidClassException + { + Class clazz = proxy.getClass(); + + MethodHandler methodHandler = null; + if (proxy instanceof ProxyObject) + methodHandler = ((ProxyObject)proxy).getHandler(); + else if (proxy instanceof Proxy) + methodHandler = ProxyFactory.getHandler((Proxy)proxy); + + return new SerializedProxy(clazz, ProxyFactory.getFilterSignature(clazz), methodHandler); + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java new file mode 100644 index 0000000..d8e8a77 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java @@ -0,0 +1,136 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ +package com.wenshuo.agent.javassist.util.proxy; + +import java.lang.reflect.AccessibleObject; +import java.lang.reflect.Constructor; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; + +class SecurityActions { + static Method[] getDeclaredMethods(final Class clazz) { + if (System.getSecurityManager() == null) + return clazz.getDeclaredMethods(); + else { + return (Method[]) AccessController + .doPrivileged(new PrivilegedAction() { + public Object run() { + return clazz.getDeclaredMethods(); + } + }); + } + } + + static Constructor[] getDeclaredConstructors(final Class clazz) { + if (System.getSecurityManager() == null) + return clazz.getDeclaredConstructors(); + else { + return (Constructor[]) AccessController + .doPrivileged(new PrivilegedAction() { + public Object run() { + return clazz.getDeclaredConstructors(); + } + }); + } + } + + static Method getDeclaredMethod(final Class clazz, final String name, + final Class[] types) throws NoSuchMethodException { + if (System.getSecurityManager() == null) + return clazz.getDeclaredMethod(name, types); + else { + try { + return (Method) AccessController + .doPrivileged(new PrivilegedExceptionAction() { + public Object run() throws Exception { + return clazz.getDeclaredMethod(name, types); + } + }); + } + catch (PrivilegedActionException e) { + if (e.getCause() instanceof NoSuchMethodException) + throw (NoSuchMethodException) e.getCause(); + + throw new RuntimeException(e.getCause()); + } + } + } + + static Constructor getDeclaredConstructor(final Class clazz, + final Class[] types) + throws NoSuchMethodException + { + if (System.getSecurityManager() == null) + return clazz.getDeclaredConstructor(types); + else { + try { + return (Constructor) AccessController + .doPrivileged(new PrivilegedExceptionAction() { + public Object run() throws Exception { + return clazz.getDeclaredConstructor(types); + } + }); + } + catch (PrivilegedActionException e) { + if (e.getCause() instanceof NoSuchMethodException) + throw (NoSuchMethodException) e.getCause(); + + throw new RuntimeException(e.getCause()); + } + } + } + + static void setAccessible(final AccessibleObject ao, + final boolean accessible) { + if (System.getSecurityManager() == null) + ao.setAccessible(accessible); + else { + AccessController.doPrivileged(new PrivilegedAction() { + public Object run() { + ao.setAccessible(accessible); + return null; + } + }); + } + } + + static void set(final Field fld, final Object target, final Object value) + throws IllegalAccessException + { + if (System.getSecurityManager() == null) + fld.set(target, value); + else { + try { + AccessController.doPrivileged(new PrivilegedExceptionAction() { + public Object run() throws Exception { + fld.set(target, value); + return null; + } + }); + } + catch (PrivilegedActionException e) { + if (e.getCause() instanceof NoSuchMethodException) + throw (IllegalAccessException) e.getCause(); + + throw new RuntimeException(e.getCause()); + } + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java b/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java new file mode 100644 index 0000000..70e6469 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java @@ -0,0 +1,99 @@ +/* + * Javassist, a Java-bytecode translator toolkit. + * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. Alternatively, the contents of this file may be used under + * the terms of the GNU Lesser General Public License Version 2.1 or later, + * or the Apache License Version 2.0. + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + */ + +package com.wenshuo.agent.javassist.util.proxy; + +import java.io.Serializable; +import java.io.ObjectStreamException; +import java.security.AccessController; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.security.ProtectionDomain; + +/** + * A proxy object is converted into an instance of this class + * when it is written to an output stream. + * + * @see RuntimeSupport#makeSerializedProxy(Object) + */ +class SerializedProxy implements Serializable { + private String superClass; + private String[] interfaces; + private byte[] filterSignature; + private MethodHandler handler; + + SerializedProxy(Class proxy, byte[] sig, MethodHandler h) { + filterSignature = sig; + handler = h; + superClass = proxy.getSuperclass().getName(); + Class[] infs = proxy.getInterfaces(); + int n = infs.length; + interfaces = new String[n - 1]; + String setterInf = ProxyObject.class.getName(); + String setterInf2 = Proxy.class.getName(); + for (int i = 0; i < n; i++) { + String name = infs[i].getName(); + if (!name.equals(setterInf) && !name.equals(setterInf2)) + interfaces[i] = name; + } + } + + /** + * Load class. + * + * @param className the class name + * @return loaded class + * @throws ClassNotFoundException for any error + */ + protected Class loadClass(final String className) throws ClassNotFoundException { + try { + return (Class)AccessController.doPrivileged(new PrivilegedExceptionAction(){ + public Object run() throws Exception{ + ClassLoader cl = Thread.currentThread().getContextClassLoader(); + return Class.forName(className, true, cl); + } + }); + } + catch (PrivilegedActionException pae) { + throw new RuntimeException("cannot load the class: " + className, pae.getException()); + } + } + + Object readResolve() throws ObjectStreamException { + try { + int n = interfaces.length; + Class[] infs = new Class[n]; + for (int i = 0; i < n; i++) + infs[i] = loadClass(interfaces[i]); + + ProxyFactory f = new ProxyFactory(); + f.setSuperclass(loadClass(superClass)); + f.setInterfaces(infs); + Proxy proxy = (Proxy)f.createClass(filterSignature).newInstance(); + proxy.setHandler(handler); + return proxy; + } + catch (ClassNotFoundException e) { + throw new java.io.InvalidClassException(e.getMessage()); + } + catch (InstantiationException e2) { + throw new java.io.InvalidObjectException(e2.getMessage()); + } + catch (IllegalAccessException e3) { + throw new java.io.InvalidClassException(e3.getMessage()); + } + } +} diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html b/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html new file mode 100644 index 0000000..6c77804 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html @@ -0,0 +1,6 @@ + + +Dynamic proxy (similar to Enhancer of cglib). +See ProxyFactory for more details. + + diff --git a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java new file mode 100644 index 0000000..c1f9678 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -0,0 +1,316 @@ +/* + * @(#)ExecuteLogUtils.java 2015-7-27 下午05:57:01 javaagent Copyright 2015 wenshuo, Inc. All rights reserved. wenshuo + * PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent.log; + +import java.io.BufferedWriter; +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.OutputStreamWriter; +import java.io.RandomAccessFile; +import java.text.ParseException; +import java.text.SimpleDateFormat; +import java.util.Calendar; +import java.util.Date; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ScheduledThreadPoolExecutor; +import java.util.concurrent.TimeUnit; + +import com.wenshuo.agent.AgentUtils; +import com.wenshuo.agent.ConfigUtils; +import com.wenshuo.agent.NamedThreadFactory; + +/** + * ExecuteLogUtils + * + * @author dingjsh + * @time 2015-7-27下午05:57:01 + */ +public class ExecuteLogUtils { + + private static BufferedWriter counterLogWriter = null; + + private static long nextDayStartTimeMillis; + + private static String logFileName = null; + + private static long startTimeMillis; + + private static ScheduledThreadPoolExecutor counterLogExecutor; + + private static ConcurrentHashMap> executeCounterMap; + + private static final Object executeCounterLock = new Object(); + + private static final int BUFFER_SIZE = 256 * 1024; + + private static final String ENCODING = "UTF-8"; + + private static boolean isUsingNanoTime = false; + + private static boolean logAvgExecuteTime = false; + + private static volatile boolean isInitialized = false; + + private ExecuteLogUtils() { + super(); + } + + /** + * 初使化 + * + * @author dingjsh + * @time 2015-7-30上午10:47:58 + */ + public static synchronized void init() { + if (isInitialized) { + return; + } + logFileName = ConfigUtils.getLogFileName(); + int interval = ConfigUtils.getLogInterval(); + logAvgExecuteTime = ConfigUtils.isLogAvgExecuteTime(); + isUsingNanoTime = ConfigUtils.isUsingNanoTime(); + if (AgentUtils.isBlank(logFileName)) { + System.err.println("日志文件名为空"); + throw new RuntimeException("日志文件名为空"); + } + setNextDateStartTimeMillis(); + initWriter(); + executeCounterMap = new ConcurrentHashMap>(); + startTimeMillis = System.currentTimeMillis(); + counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); + counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); + isInitialized = true; + } + + public static void log(String className, String methodName, long executeTime) { + logExecuteCounter(className, methodName, executeTime); + } + + /** + * 输出方法执行记数日志 + * + * @author dingjsh + * @time 2015-7-28下午01:35:25 + */ + synchronized static void outputCounterLog() throws IOException { + ConcurrentHashMap> executeCounterMapInner = executeCounterMap; + executeCounterMap = new ConcurrentHashMap>(); + String startTime = formatTimeMillis(startTimeMillis); + String endTime = formatTimeMillis(System.currentTimeMillis()); + long byteLength = removeJSONArrayEndBracket(); + if (0 == byteLength) { + writeLog("[", true, startTimeMillis); + } + + Set>> entrySet = executeCounterMapInner.entrySet(); + Iterator>> ite = entrySet.iterator(); + int length = entrySet.size(); + if (length > 0 && byteLength > 10) { // 说明文件不只是[],json数组中已经有内容 + writeLog(",", startTimeMillis); + } + for (int index = 0; ite.hasNext(); index++) { + Map.Entry> entry = ite.next(); + String className = entry.getKey(); + Map method2ExecuteMap = entry.getValue(); + String methodExecuteJson = MethodExecuteJSONformatter.getMethodExecuteJSON(className, method2ExecuteMap, + startTime, endTime, isUsingNanoTime, logAvgExecuteTime); + writeLog(methodExecuteJson, startTimeMillis); + if (index < length - 1) { + writeLog(",", true, startTimeMillis); + } + } + writeLog("]", true, startTimeMillis); + flushLogAndClose(); + startTimeMillis = System.currentTimeMillis(); + } + + private static void logExecuteCounter(String className, String methodName, long executeTime) { + // dingjs modified in 20210825 原来是用锁和AtomicLong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 + // 数据有一些误差，这个误差对于agent数据监控并没有什么影响，牺牲一定的准确性带来性能的提升是有必要的 + ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); + long[] counter = methodCounterMap.get(methodName); + if (null == counter) { + methodCounterMap.put(methodName, new long[]{1, executeTime}); + } else { + counter[0]++; + counter[1] = executeTime + counter[1]; + } + } + + /** + * ExecuteLogUtils + * + * @param className 类名 + * @return class和它的调用次数映射关系 + * @description 获得class和它的调用次数映射关系，如果exeuteCounterMap中没有，则创建一个并放入 + * @author dingjsh + * @date 2018年5月25日 下午4:40:33 + * @version 1.2.0 + */ + private static ConcurrentHashMap getOrCreateClassExecutesMapping(String className) { + ConcurrentHashMap methodCounterMap = executeCounterMap.get(className); + if (null == methodCounterMap) { + synchronized (executeCounterLock) { + methodCounterMap = executeCounterMap.get(className); + if (null == methodCounterMap) { + methodCounterMap = new ConcurrentHashMap(); + executeCounterMap.put(className, methodCounterMap); + } + } + } + return methodCounterMap; + } + + private static void writeLog(String logValue, long currTimeMillis) { + writeLog(logValue, false, currTimeMillis); + } + + private static void writeLog(String logValue, boolean newLine, long currTimeMillis) { + ensureLogFileUpToDate(currTimeMillis); + try { + counterLogWriter.write(logValue); + if (newLine) { + counterLogWriter.newLine(); + } + } catch (IOException e) { + System.err.println(e); + } + + } + + private static void flushLogAndClose() { + try { + counterLogWriter.flush(); + } catch (IOException e) { + System.err.println(e); + } finally { + AgentUtils.closeQuietly(counterLogWriter); + counterLogWriter = null; + } + } + + /** + * 确保日志文件没过时,日志文件都会加上日期后缀,如果当前日志文件 + */ + private static void ensureLogFileUpToDate(long currTimeMillis) { + if (currTimeMillis >= nextDayStartTimeMillis) { + try { + if (null != counterLogWriter) { + counterLogWriter.flush(); + } + } catch (Exception e) { + System.err.println(e); + } finally { + AgentUtils.closeQuietly(counterLogWriter); + } + initWriter(); + setNextDateStartTimeMillis(); + } + if (null == counterLogWriter) { + initWriter(); + } + + } + + private static void initWriter() { + try { + File logFile = getCounterLogFile(logFileName); + counterLogWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(logFile, true), ENCODING), + BUFFER_SIZE); + } catch (IOException e) { + System.err.println(e); + throw new RuntimeException("无法初始化【" + logFileName + "】,建议您检查磁盘空间，或者手动删除该日志文件"); + } + } + + private static File getCounterLogFile(String logFileName) throws IOException { + + String logFileNameWithDate = getCurrDateString(); + int lastIndexOfDot = logFileName.lastIndexOf('.'); + if (lastIndexOfDot > 0) { + logFileName = logFileName.substring(0, lastIndexOfDot) + "." + logFileNameWithDate + + logFileName.substring(lastIndexOfDot); + } else { + logFileName = logFileName + "." + logFileNameWithDate + ".log"; + } + File logFile = getLogFile(logFileName); + return logFile; + } + + private static File getLogFile(String logFileName) throws IOException { + File logFile = new File(logFileName); + if (logFile.isDirectory()) { + System.err.println("【" + logFileName + "】是文件夹"); + throw new RuntimeException("【" + logFileName + "】是文件夹"); + } else if (!logFile.exists()) { + // dingjs modified in 20140513 + File dirFile = logFile.getParentFile(); + AgentUtils.forceMkdir(dirFile); + boolean created = logFile.createNewFile(); + if (!created) { + System.err.println("【" + logFileName + "】创建失败"); + throw new RuntimeException("【" + logFileName + "】创建失败"); + } + } + return logFile; + } + + private static String getCurrDateString() { + Date today = new Date(); + return new SimpleDateFormat("yyyy-MM-dd").format(today); + } + + /** + * 由开始日期转换为开始时间，一般在以时间为条件的查询中使用 + */ + private static Date date2StartTime(Date date) { + SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); + String dateStr = sdf.format(date); + Date startTime = null; + try { + startTime = sdf.parse(dateStr + " 00:00:00"); + } catch (ParseException e) { + System.err.println(e); + } + return startTime; + } + + /** + * 设置下一天的开始时间 + */ + private static void setNextDateStartTimeMillis() { + Date currDate = new Date(); + Calendar cal = Calendar.getInstance(); + cal.setTime(currDate); + cal.add(Calendar.DATE, 1); + Date startTime = date2StartTime(cal.getTime()); + nextDayStartTimeMillis = startTime.getTime(); + } + + private static String formatTimeMillis(long timeMillis) { + Date date = new Date(timeMillis); + SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); + return sdf.format(date); + } + + private static long removeJSONArrayEndBracket() throws IOException { + File logFile = getCounterLogFile(logFileName); + RandomAccessFile f = new RandomAccessFile(logFile.getAbsolutePath(), "rw"); + long length = f.length(); + byte b = -1; + while (b != 93 && length > 0) { + length -= 1; + f.seek(length); + b = f.readByte(); + } + f.setLength(length); + f.close(); + return length; + } +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java new file mode 100644 index 0000000..13e1454 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java @@ -0,0 +1,70 @@ +package com.wenshuo.agent.log; + +import java.util.Map; + + +/** + * MethodExecuteJSONformatter + * + * @author dingjsh + * @version 2.0.0 + * @description 2.0.0 + * @date 2018年8月22日 下午8:07:01 + */ +class MethodExecuteJSONformatter { + + /** + * MethodExecuteJSONformatter + * + * @param className 类名 + * @param method2ExecuteMap Map<方法名, Long[]> 数组第一个是执行次数，第二个是执行时间 + * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss + * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss + * @return 格式化后的json string + * @description 将方法执行监控数据格式化为json string + * @author dingjsh + * @date 2018年8月22日 下午8:49:18 + * @version 2.0.0 + */ + static String getMethodExecuteJSON(String className, Map method2ExecuteMap, + String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { + StringBuilder json = new StringBuilder("{"); + appendString(json, "class", className).append(","); + appendString(json, "start", startTime).append(","); + appendString(json, "end", endTime).append(","); + appendKey(json, "methods").append("["); + for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { + String methodName = methodEntry.getKey(); + long[] executeCounter = methodEntry.getValue(); + long counter = executeCounter[0]; + long timeInMillis + = isUsingNanoTime ? executeCounter[1] / 1000000 : executeCounter[1]; + json.append("{"); + appendString(json, "name", methodName).append(","); + appendLong(json, "counter", counter).append(","); + appendLong(json, "time", timeInMillis); + if (logAvgExecuteTime && counter > 0) { + json.append(","); + appendLong(json, "avg", timeInMillis / counter); + } + json.append("},"); + } + if (json.charAt(json.length() - 1) == ',') { + json.deleteCharAt(json.length() - 1); + } + json.append("]}"); + return json.toString(); + } + + private static StringBuilder appendString(StringBuilder jsonBuilder, String key, String value) { + return appendKey(jsonBuilder, key).append("\"").append(value).append("\""); + } + + private static StringBuilder appendLong(StringBuilder jsonBuilder, String key, long value) { + return appendKey(jsonBuilder, key).append(value); + } + + private static StringBuilder appendKey(StringBuilder jsonBuilder, String key) { + return jsonBuilder.append("\"").append(key).append("\":"); + } +} diff --git a/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java b/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java new file mode 100644 index 0000000..3a08620 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java @@ -0,0 +1,31 @@ +/* + * @(#)OutputLogRunnable.java 2015-7-28 下午03:27:20 + * javaagent + * Copyright 2015 wenshuo, Inc. All rights reserved. + * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. + */ +package com.wenshuo.agent.log; + +/** + * OutputLogRunnable + * + * @author dingjsh + * @time 2015-7-28下午03:27:20 + */ +public class OutputLogRunnable implements Runnable { + + /* + * (non-Javadoc) + * + * @see java.lang.Runnable#run() + */ + @Override + public void run() { + try{ + ExecuteLogUtils.outputCounterLog(); + }catch(Exception e){ + System.err.println(e); + } + } + +} diff --git a/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java new file mode 100644 index 0000000..545b231 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -0,0 +1,155 @@ +package com.wenshuo.agent.transformer; + +import com.wenshuo.agent.ConfigUtils; +import com.wenshuo.agent.PojoDetector; +import com.wenshuo.agent.javassist.CannotCompileException; +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.LoaderClassPath; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.NotFoundException; +import java.io.IOException; +import java.lang.instrument.ClassFileTransformer; +import java.security.ProtectionDomain; +import java.util.Collections; +import java.util.Set; +import java.util.regex.Pattern; + +/** + * AgentLogClassFileTransformer 类增强，增加agent日志 + * + * @author dingjsh + * @time 2015-7-24上午09:53:44 + */ +public class AgentLogClassFileTransformer implements ClassFileTransformer { + + private static final String LOG_UTILS = "com.wenshuo.agent.log.ExecuteLogUtils"; + + private static final String AGENT_PACKAGE_NAME = "com.wenshuo.agent"; + + + public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, + ProtectionDomain protectionDomain, byte[] classfileBuffer) { + byte[] byteCode = classfileBuffer; + className = className.replace('/', '.'); + if (!isNeedLogExecuteInfo(className)) { + return byteCode; + } + if (null == loader) { + loader = Thread.currentThread().getContextClassLoader(); + } + byteCode = aopLog(loader, className, byteCode); + return byteCode; + } + + private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { + try { + ClassPool cp = ClassPool.getDefault(); + CtClass cc; + try { + cc = cp.get(className); + } catch (NotFoundException e) { + cp.insertClassPath(new LoaderClassPath(loader)); + cc = cp.get(className); + } + byteCode = aopLog(cc, className, byteCode); + } catch (Exception ex) { + System.err.println(ex); + } + return byteCode; + } + + private byte[] aopLog(CtClass cc, String className, byte[] byteCode) throws CannotCompileException, IOException { + if (null == cc) { + return byteCode; + } + if (!cc.isInterface()) { + CtMethod[] methods = cc.getDeclaredMethods(); + if (null != methods && methods.length > 0) { + boolean isOpenPojoMonitor = ConfigUtils.isOpenPojoMonitor(); + Set getSetMethods = Collections.emptySet(); + if (!isOpenPojoMonitor) { + getSetMethods = PojoDetector.getPojoMethodNames(methods); + } + for (CtMethod m : methods) { + if (isOpenPojoMonitor || !getSetMethods.contains(m.getName())) { + aopLog(className, m); + } + } + byteCode = cc.toBytecode(); + } + } + cc.detach(); + return byteCode; + } + + private void aopLog(String className, CtMethod m) throws CannotCompileException { + if (null == m || m.isEmpty()) { + return; + } + boolean isMethodStatic = Modifier.isStatic(m.getModifiers()); + String aopClassName = isMethodStatic ? "\"" + className + "\"" : "this.getClass().getName()"; + final String timeMethodStr + = ConfigUtils.isUsingNanoTime() ? "java.lang.System.nanoTime()" : "java.lang.System.currentTimeMillis()"; + + // 避免变量名重复 + m.addLocalVariable("dingjsh_javaagent_elapsedTime", CtClass.longType); + m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); + m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;"); + m.insertAfter(LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() + + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); + } + + /** + * 是否需要记录执行信息 + * + * @param className 类名 + * @return 是否需要记录执行信息 + * @author dingjsh + * @time 2015-7-27下午06:11:02 + */ + private boolean isNeedLogExecuteInfo(String className) { + // do not transform the agent class,prevent deadlock + if (className.startsWith(AGENT_PACKAGE_NAME)) { + return false; + } + Set includes = ConfigUtils.getIncludePackages(); + if (null == includes || includes.isEmpty()) { + return false; + } + + boolean isNeeded = false; + // include package + for (String packageName : includes) { + if (className.startsWith(packageName)) { + isNeeded = true; + break; + } + } + // exclude package + if (isNeeded) { + Set excludes = ConfigUtils.getExcludePackages(); + if (null != excludes && !excludes.isEmpty()) { + for (String packageName : excludes) { + if (className.startsWith(packageName)) { + isNeeded = false; + break; + } + } + } + } + if (isNeeded) { + Set excludeClassRegexs = ConfigUtils.getExcludeClassRegexs(); + if (null != excludeClassRegexs && !excludeClassRegexs.isEmpty()) { + for (String regex : excludeClassRegexs) { + isNeeded = !Pattern.matches(regex, className); + if (!isNeeded) { + break; + } + } + } + } + return isNeeded; + } +} diff --git a/src/main/resources/agent.properties b/src/main/resources/agent.properties new file mode 100644 index 0000000..2117cd7 --- /dev/null +++ b/src/main/resources/agent.properties @@ -0,0 +1,16 @@ +#\u9700\u8981\u76d1\u63a7\u7684\u5305\uff0c\u591a\u4e2a\u5305\u7528\u5206\u53f7\u5206\u9694 +agent.include.package=com.XXX +#\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u5305\uff0c\u591a\u4e2a\u5305\u7528\u5206\u53f7\u5206\u9694\u3002 \u9700\u8981\u76d1\u63a7\u7684\u5305-\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u5305\u5c31\u662f\u771f\u6b63\u8981\u76d1\u63a7\u7684\u5305 +agent.exclude.package= +#\u65e5\u5fd7\u6587\u4ef6\uff0c\u4f1a\u81ea\u52a8\u589e\u52a0\u65e5\u671f\u540e\u7f00 +agent.log.file=d\:\\agent.log +#\u65e5\u5fd7\u8f93\u51fa\u5468\u671f +agent.log.interval.seconds=600 +#\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u7c7b\u7684\u6b63\u5219\u8868\u8fbe\u5f0f +agent.exclude.class.regex= +#\u662f\u5426\u8bb0\u5f55\u5e73\u5747\u65f6\u95f4 +agent.log.avg.execute.time=false +#\u9ed8\u8ba4\u4e0d\u9700\u8981\u76d1\u63a7\u7684\u7c7b\u7684\u6b63\u5219\u8868\u8fbe\u5f0f +agent.exclude.class.regex.default=.*EnhancerByCGLIB.*;.*FastClassByCGLIB.*;.*EnhancerBySpringCGLIB.*;.*FastClassBySpringCGLIB.* +#\u8bb0\u5f55\u65b9\u6cd5\u7684\u8017\u65f6\u65f6\u662f\u91c7\u7528nanoTime,\u8fd8\u662fcurrentTimeMillis,nanoTime\u66f4\u51c6\u786e\uff0c\u4f46\u662f\u4f1a\u8017\u65f6\u4e00\u4e9b +agent.log.nano=true diff --git a/src/test/java/com/wenshuo/agent/test/TestCtMethod.java b/src/test/java/com/wenshuo/agent/test/TestCtMethod.java new file mode 100644 index 0000000..ecca591 --- /dev/null +++ b/src/test/java/com/wenshuo/agent/test/TestCtMethod.java @@ -0,0 +1,50 @@ +package com.wenshuo.agent.test; + +import java.util.Arrays; +import java.util.List; + +import org.junit.Assert; +import org.junit.Test; + +import com.wenshuo.agent.javassist.ClassPool; +import com.wenshuo.agent.javassist.CtClass; +import com.wenshuo.agent.javassist.CtMethod; +import com.wenshuo.agent.javassist.Modifier; +import com.wenshuo.agent.javassist.NotFoundException; + +public class TestCtMethod { + + private static List staticMethodNames = Arrays.asList("privateStatic","protectedStatic","publicStatic","defaultStatic"); + + @Test + public void staticMethodTest() throws NotFoundException{ + ClassPool cp = ClassPool.getDefault(); + CtClass ctClass = cp.get("com.wenshuo.agent.test.TestCtMethod"); + CtMethod[] ctMethods = ctClass.getDeclaredMethods(); + for(CtMethod ctMethod : ctMethods){ + String methodName = ctMethod.getName(); + if(staticMethodNames.contains(methodName)){ + Assert.assertTrue(methodName+" is static method", Modifier.isStatic(ctMethod.getModifiers())); + } + } + System.out.println("staticMethodTest is successful"); + } + + private static void privateStatic(){ + System.out.println("I'm private and static"); + } + + protected static void protectedStatic(){ + System.out.println("I'm private and static"); + } + + public static void publicStatic(){ + System.out.println("I'm public and static"); + } + static void defaultStatic(){ + System.out.println("I'm default and static"); + } + + + +} From 2a13f489054f622aae42010e349444635610ea33 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Mon, 16 Oct 2023 11:07:55 +0800 Subject: [PATCH 17/25] =?UTF-8?q?=E4=BF=AE=E6=94=B9readme?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/README.md b/README.md index 8736aa2..84f08d7 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ -# Javaagent +# 🎉 Javaagent 🎉 ## 概述 -javaagent是一个简单优雅的java agent,利用java自带的instrument特性+javassist字节码编辑技术，实现了无侵入的方法级性能监控。相比于NewRelic或者开源的[pinpoint](https://github.com/naver/pinpoint),以及阿里的[arthas](https://github.com/alibaba/arthas),本工具主打的是简单，我们只记录每个方法的执行次数和时间，并输出到json格式的日志文件中。基于javaagent的日志，你可以使用严丽同学开发的[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)进行分析查询，或者可以自己去写分析器，这样可以让你快速定位生产环境的性能瓶颈。 +**javaagent** 是一个简单优雅的 java agent ,利用 java 自带的 `instrument` 特性+ `javassist` 字节码编辑技术，实现了无侵入的方法级性能监控。相比于NewRelic或者开源的[pinpoint](https://github.com/naver/pinpoint),以及阿里的[arthas](https://github.com/alibaba/arthas),本工具主打的是简单，我们只记录每个方法的执行次数和时间，并输出到json格式的日志文件中。基于javaagent的日志，你可以使用严丽同学开发的[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)进行分析查询，或者可以自己去写分析器，这样可以让你快速定位生产环境的性能瓶颈。 ## 集成 java启动参数中就有javaagent,你只需要在JAVA_OPTS中加入`-javaagent:/opt/javaagent/javaagent.jar=/opt/javaagent/agent.properties`就实现了方法级监控。其中`=`前指定的是jar包的路径，`=`后指定的是对agent的一些配置参数。 @@ -12,25 +12,24 @@ agent.include.package=com.XXX # 不需要监控的包，多个包用分号分隔。 需要监控的包-不需要监控的包就是真正要监控的包 agent.exclude.package= # 日志文件，会自动增加日期后缀 -agent.log.file=d\:\\agent.log +agent.log.file=/opt/agent.log # 日志输出周期 agent.log.interval.seconds=600 # 不需要监控的类的正则表达式 agent.exclude.class.regex= # 是否记录平均时间 agent.log.avg.execute.time=false -# 默认不需要监控的类的正则表达式 -agent.exclude.class.regex.default=.*EnhancerByCGLIB.*;.*FastClassByCGLIB.* # 记录方法的耗时时是采用nanoTime,还是currentTimeMillis,nanoTime更准确，但是会耗时一些 agent.log.nano=true ``` ## agent日志分析器使用 -agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分析工具，除了基础功能，对于有sql能力的同学，你可以直接使用[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)自带的[console](http://XXXX/console)登录后，直接写sql进行统计，你可以按自己想要的维度来进行处理。 +agent日志分析器是我同事严丽使用SpringBoot+h2数据库开发的分析工具，除了基础功能，对于有sql能力的同学，你可以直接使用[agent日志分析工具](https://pan.baidu.com/s/1Ma4iEWRmBonGO1TapeEF-g)自带的[console](http://ip:port/console)登录后，直接写sql进行统计，你可以按自己想要的维度来进行处理。 - JDBC URL: jdbc:h2:mem:~/h2test - USer Name : sa - Password : 空 -登录后，你就可以尽情的写sql了。 + +登录后，你就可以尽情地写 sql 对类、方法的执行次数、执行时间进行统计查询。 ## 欢迎关注我的公众号 - 程序员阿水 From edf5e4ee08d2f8da4130518e0cf22368a33426f7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Mon, 16 Oct 2023 11:21:01 +0800 Subject: [PATCH 18/25] =?UTF-8?q?=E4=BF=AE=E6=94=B9MANIFEST?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- pom.xml | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/pom.xml b/pom.xml index 4bc2299..d3d4eec 100644 --- a/pom.xml +++ b/pom.xml @@ -26,7 +26,7 @@ Apache License, Version 2.0 - http://www.apache.org/licenses/LICENSE-2.0.txt + https://www.apache.org/licenses/LICENSE-2.0.txt repo @@ -48,9 +48,10 @@ org.apache.maven.plugins maven-compiler-plugin + 3.8.1 - 6 - 6 + ${project.build.target} + ${project.build.target} From aa1cea60d0042f58977fb5d42c16afca92ad589d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=B8=81=E5=BB=BA=E6=B0=B4?= Date: Mon, 16 Oct 2023 17:59:27 +0800 Subject: [PATCH 19/25] =?UTF-8?q?=E6=94=AF=E6=8C=81=E4=BD=BF=E7=94=A8?= =?UTF-8?q?=E7=B3=BB=E7=BB=9F=E5=BC=95=E7=94=A8=E7=9A=84=E6=97=A5=E5=BF=97?= =?UTF-8?q?=E6=A1=86=E6=9E=B6?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- pom.xml | 146 ++++++++++-------- src/main/java/com/wenshuo/agent/Agent.java | 9 +- .../java/com/wenshuo/agent/ConfigUtils.java | 10 +- .../wenshuo/agent/applog/AppLogFactory.java | 52 +++++++ .../agent/applog/CommonsLoggingAppLog.java | 50 ++++++ .../wenshuo/agent/applog/ConsoleAppLog.java | 40 +++++ .../com/wenshuo/agent/applog/IAppLog.java | 28 ++++ .../com/wenshuo/agent/applog/Slf4jAppLog.java | 50 ++++++ .../wenshuo/agent/log/ExecuteLogUtils.java | 20 ++- .../wenshuo/agent/log/OutputLogRunnable.java | 19 +-- .../AgentLogClassFileTransformer.java | 30 ++-- 11 files changed, 357 insertions(+), 97 deletions(-) create mode 100644 src/main/java/com/wenshuo/agent/applog/AppLogFactory.java create mode 100644 src/main/java/com/wenshuo/agent/applog/CommonsLoggingAppLog.java create mode 100644 src/main/java/com/wenshuo/agent/applog/ConsoleAppLog.java create mode 100644 src/main/java/com/wenshuo/agent/applog/IAppLog.java create mode 100644 src/main/java/com/wenshuo/agent/applog/Slf4jAppLog.java diff --git a/pom.xml b/pom.xml index d3d4eec..7a93d28 100644 --- a/pom.xml +++ b/pom.xml @@ -1,76 +1,90 @@ - 4.0.0 + xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> + 4.0.0 - com.wenshuo - javaagent - 2.1.2 - jar + com.wenshuo + javaagent + 2.1.2 + jar - javaagent - 基于javaagent技术来记录方法执行次数和时间 - https://github.com/dingjs/javaagent + javaagent + 基于javaagent技术来记录方法执行次数和时间 + https://github.com/dingjs/javaagent - - UTF-8 - 1.6 - UTF-8 - - - - dingjsh - 丁建水 - 47954233@qq.com - - - - - Apache License, Version 2.0 - https://www.apache.org/licenses/LICENSE-2.0.txt - repo - - + + UTF-8 + 1.6 + UTF-8 + + + + dingjsh + 丁建水 + 47954233@qq.com + + + + + Apache License, Version 2.0 + https://www.apache.org/licenses/LICENSE-2.0.txt + repo + + - - - - org.apache.maven.plugins - maven-jar-plugin - 3.3.0 - - - - com.wenshuo.agent.Agent - - - - - - org.apache.maven.plugins - maven-compiler-plugin - 3.8.1 - - ${project.build.target} - ${project.build.target} - - - - + + + + org.apache.maven.plugins + maven-jar-plugin + 3.3.0 + + + + com.wenshuo.agent.Agent + + + + + + org.apache.maven.plugins + maven-compiler-plugin + 3.8.1 + + ${project.build.target} + ${project.build.target} + + + + - + + + com.sun + tools + ${java.version} + system + true + ${java.home}/../lib/tools.jar + + + junit + junit + 4.13.2 + test + + + org.slf4j + slf4j-api + 1.7.36 + compile + true + - com.sun - tools - ${java.version} - system + commons-logging + commons-logging + 1.2 + compile true - ${java.home}/../lib/tools.jar - - junit - junit - 4.13.2 - test - - + diff --git a/src/main/java/com/wenshuo/agent/Agent.java b/src/main/java/com/wenshuo/agent/Agent.java index c32f651..4397784 100644 --- a/src/main/java/com/wenshuo/agent/Agent.java +++ b/src/main/java/com/wenshuo/agent/Agent.java @@ -4,8 +4,13 @@ * Copyright 2015 wenshuo, Inc. All rights reserved. * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ + package com.wenshuo.agent; + import java.lang.instrument.Instrumentation; + +import com.wenshuo.agent.applog.AppLogFactory; +import com.wenshuo.agent.applog.IAppLog; import com.wenshuo.agent.log.ExecuteLogUtils; import com.wenshuo.agent.transformer.AgentLogClassFileTransformer; @@ -16,10 +21,12 @@ */ public class Agent { + private static IAppLog log = AppLogFactory.getAppLog(Agent.class); + public static void premain(String agentArs, Instrumentation inst) { - System.out.println("javaagent启动成功，将自动记录方法的执行次数和时间"); // 初始化配置 ConfigUtils.initProperties(agentArs); + log.info("javaagent启动成功，将自动记录方法的执行次数和时间,日志文件路径：" + ConfigUtils.getLogFileName()); ExecuteLogUtils.init(); inst.addTransformer(new AgentLogClassFileTransformer()); } diff --git a/src/main/java/com/wenshuo/agent/ConfigUtils.java b/src/main/java/com/wenshuo/agent/ConfigUtils.java index 400a9be..e086fc2 100644 --- a/src/main/java/com/wenshuo/agent/ConfigUtils.java +++ b/src/main/java/com/wenshuo/agent/ConfigUtils.java @@ -7,6 +7,9 @@ import java.util.Properties; import java.util.Set; +import com.wenshuo.agent.applog.AppLogFactory; +import com.wenshuo.agent.applog.IAppLog; + /** * 获取配置信息
* ConfigUtils @@ -24,6 +27,8 @@ public class ConfigUtils { private static Set excludeClassRegexs; + private static IAppLog log = AppLogFactory.getAppLog(ConfigUtils.class); + private ConfigUtils() { super(); } @@ -49,7 +54,7 @@ private static Properties getProperties(String propertiesFileName) { input = ConfigUtils.class.getClassLoader().getResourceAsStream("agent.properties"); properties.load(input); } catch (Exception e) { - System.err.println("未找到默认配置"); + log.warn("未找到默认配置"); } finally { AgentUtils.closeQuietly(input); } @@ -58,7 +63,7 @@ private static Properties getProperties(String propertiesFileName) { input = new FileInputStream(propertiesFileName); properties.load(input); } catch (Exception e) { - System.err.println(e); + log.error("解析配置文件出错：" + propertiesFileName, e); } finally { AgentUtils.closeQuietly(input); } @@ -158,4 +163,5 @@ public static boolean isUsingNanoTime() { String value = getProperty(ConfigConsts.LOG_TIME_NANO); return "true".equalsIgnoreCase(value); } + } diff --git a/src/main/java/com/wenshuo/agent/applog/AppLogFactory.java b/src/main/java/com/wenshuo/agent/applog/AppLogFactory.java new file mode 100644 index 0000000..4283064 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/applog/AppLogFactory.java @@ -0,0 +1,52 @@ +/** + * @projectName javaagent + * @package com.wenshuo.agent.applog + * @className com.wenshuo.agent.applog.IAppLogFactory + * @copyright Copyright 2023 Thunisoft, Inc All rights reserved. + */ + +package com.wenshuo.agent.applog; + +/** + * AppLogFactory + * + * @author dingjsh + * @description javaagent日志工厂类 + * @date 2023-10-16 11:49 + * @since 2.1.3 + */ +public class AppLogFactory { + + private static final String SLF4J_FACTORY_CLASS_NAME = "org.slf4j.LoggerFactory"; + + private static final String COMMONS_LOGGING_FACTORY_CLASS_NAME = "org.apache.commons.logging.LogFactory"; + + /** + * 如果工程中有slf4j,则采用slf4j输出日志，如果有commons-logging,则采用commons-logging,否则用console + * @param clazz + * @return javaagent日志对象 + */ + public static IAppLog getAppLog(Class clazz) { + if (isClassPresent(SLF4J_FACTORY_CLASS_NAME, Thread.currentThread().getContextClassLoader())) { + return new Slf4jAppLog(clazz); + } else if (isClassPresent(COMMONS_LOGGING_FACTORY_CLASS_NAME, Thread.currentThread().getContextClassLoader())) { + return new CommonsLoggingAppLog(clazz); + } else { + return new ConsoleAppLog(); + } + } + + protected static boolean isClassPresent(String className, ClassLoader classLoader) { + try { + resolve(className, classLoader); + return true; + } catch (Throwable throwable) { + return false; + } + } + + protected static Class resolve(String className, ClassLoader classLoader) throws ClassNotFoundException { + return classLoader != null ? Class.forName(className, false, classLoader) : Class.forName(className); + } + +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/applog/CommonsLoggingAppLog.java b/src/main/java/com/wenshuo/agent/applog/CommonsLoggingAppLog.java new file mode 100644 index 0000000..f832c0d --- /dev/null +++ b/src/main/java/com/wenshuo/agent/applog/CommonsLoggingAppLog.java @@ -0,0 +1,50 @@ +/** + * @projectName javaagent + * @package com.wenshuo.agent.applog + * @className com.wenshuo.agent.applog.CommonsLoggingAppLog + * @copyright Copyright 2023 Thunisoft, Inc All rights reserved. + */ + +package com.wenshuo.agent.applog; + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; + +/** + * CommonsLoggingAppLog + * + * @author dingjsh + * @description + * @date 2023-10-16 17:35 + * @since 2.1.3 + */ +class CommonsLoggingAppLog implements IAppLog { + + private Log log; + + public CommonsLoggingAppLog(Class clazz) { + log = LogFactory.getLog(clazz); + } + + @Override + public void info(String message) { + log.info(message); + + } + + @Override + public void warn(String message) { + log.warn(message); + } + + @Override + public void error(String message) { + log.error(message); + } + + @Override + public void error(String message, Throwable t) { + log.error(message, t); + } + +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/applog/ConsoleAppLog.java b/src/main/java/com/wenshuo/agent/applog/ConsoleAppLog.java new file mode 100644 index 0000000..d9011c8 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/applog/ConsoleAppLog.java @@ -0,0 +1,40 @@ +/** + * @projectName javaagent + * @package com.wenshuo.agent.applog + * @className com.wenshuo.agent.applog.ConsoleAppLog + * @copyright Copyright 2023 Thunisoft, Inc All rights reserved. + */ + +package com.wenshuo.agent.applog; + +/** + * ConsoleAppLog + * + * @author dingjsh + * @description + * @date 2023-10-16 17:37 + * @since 2.1.3 + */ +class ConsoleAppLog implements IAppLog { + + @Override + public void info(String message) { + System.out.println("[info ] " + message); + } + + @Override + public void warn(String message) { + System.out.println("[warn ] " + message); + } + + @Override + public void error(String message) { + System.err.println("[error ] " + message); + } + + @Override + public void error(String message, Throwable t) { + System.err.println("[error ] " + message); + } + +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/applog/IAppLog.java b/src/main/java/com/wenshuo/agent/applog/IAppLog.java new file mode 100644 index 0000000..2aa9821 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/applog/IAppLog.java @@ -0,0 +1,28 @@ +/** + * @projectName javaagent + * @package com.wenshuo.agent.applog + * @className com.wenshuo.agent.applog.IAppLog + * @copyright Copyright 2023 Thunisoft, Inc All rights reserved. + */ + +package com.wenshuo.agent.applog; + +/** + * IAppLog + * + * @author dingjsh + * @description javaagent日志接口 + * @date 2023-10-16 11:46 + * @since 2.1.3 + */ +public interface IAppLog { + + void info(String message); + + void warn(String message); + + void error(String message); + + void error(String message, Throwable t); + +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/applog/Slf4jAppLog.java b/src/main/java/com/wenshuo/agent/applog/Slf4jAppLog.java new file mode 100644 index 0000000..ed60c66 --- /dev/null +++ b/src/main/java/com/wenshuo/agent/applog/Slf4jAppLog.java @@ -0,0 +1,50 @@ +/** + * @projectName javaagent + * @package com.wenshuo.agent.applog + * @className com.wenshuo.agent.applog.Slf4jAppLog + * @copyright Copyright 2023 Thunisoft, Inc All rights reserved. + */ + +package com.wenshuo.agent.applog; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Slf4jAppLog + * + * @author dingjsh + * @description + * @date 2023-10-16 16:58 + * @since 2.1.3 + */ +class Slf4jAppLog implements IAppLog { + + private Logger log; + + public Slf4jAppLog(Class clazz) { + log = LoggerFactory.getLogger(clazz); + } + + @Override + public void info(String message) { + log.info(message); + + } + + @Override + public void warn(String message) { + log.warn(message); + } + + @Override + public void error(String message) { + log.error(message); + } + + @Override + public void error(String message, Throwable t) { + log.error(message, t); + } + +} \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java index c1f9678..624d8c1 100644 --- a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -2,6 +2,7 @@ * @(#)ExecuteLogUtils.java 2015-7-27 下午05:57:01 javaagent Copyright 2015 wenshuo, Inc. All rights reserved. wenshuo * PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ + package com.wenshuo.agent.log; import java.io.BufferedWriter; @@ -24,6 +25,8 @@ import com.wenshuo.agent.AgentUtils; import com.wenshuo.agent.ConfigUtils; import com.wenshuo.agent.NamedThreadFactory; +import com.wenshuo.agent.applog.AppLogFactory; +import com.wenshuo.agent.applog.IAppLog; /** * ExecuteLogUtils @@ -57,6 +60,8 @@ public class ExecuteLogUtils { private static volatile boolean isInitialized = false; + private static final IAppLog log = AppLogFactory.getAppLog(ExecuteLogUtils.class); + private ExecuteLogUtils() { super(); } @@ -76,7 +81,7 @@ public static synchronized void init() { logAvgExecuteTime = ConfigUtils.isLogAvgExecuteTime(); isUsingNanoTime = ConfigUtils.isUsingNanoTime(); if (AgentUtils.isBlank(logFileName)) { - System.err.println("日志文件名为空"); + log.error("日志文件名为空"); throw new RuntimeException("日志文件名为空"); } setNextDateStartTimeMillis(); @@ -136,7 +141,7 @@ private static void logExecuteCounter(String className, String methodName, long ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); long[] counter = methodCounterMap.get(methodName); if (null == counter) { - methodCounterMap.put(methodName, new long[]{1, executeTime}); + methodCounterMap.put(methodName, new long[] {1, executeTime}); } else { counter[0]++; counter[1] = executeTime + counter[1]; @@ -179,7 +184,7 @@ private static void writeLog(String logValue, boolean newLine, long currTimeMill counterLogWriter.newLine(); } } catch (IOException e) { - System.err.println(e); + log.error(e.getMessage(), e); } } @@ -188,7 +193,7 @@ private static void flushLogAndClose() { try { counterLogWriter.flush(); } catch (IOException e) { - System.err.println(e); + log.error(e.getMessage(), e); } finally { AgentUtils.closeQuietly(counterLogWriter); counterLogWriter = null; @@ -224,7 +229,7 @@ private static void initWriter() { counterLogWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(logFile, true), ENCODING), BUFFER_SIZE); } catch (IOException e) { - System.err.println(e); + log.error(e.getMessage(), e); throw new RuntimeException("无法初始化【" + logFileName + "】,建议您检查磁盘空间，或者手动删除该日志文件"); } } @@ -254,7 +259,7 @@ private static File getLogFile(String logFileName) throws IOException { AgentUtils.forceMkdir(dirFile); boolean created = logFile.createNewFile(); if (!created) { - System.err.println("【" + logFileName + "】创建失败"); + log.error("【" + logFileName + "】创建失败"); throw new RuntimeException("【" + logFileName + "】创建失败"); } } @@ -276,7 +281,7 @@ private static Date date2StartTime(Date date) { try { startTime = sdf.parse(dateStr + " 00:00:00"); } catch (ParseException e) { - System.err.println(e); + log.error(e.getMessage(), e); } return startTime; } @@ -313,4 +318,5 @@ private static long removeJSONArrayEndBracket() throws IOException { f.close(); return length; } + } \ No newline at end of file diff --git a/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java b/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java index 3a08620..09e4f47 100644 --- a/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java +++ b/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java @@ -4,27 +4,28 @@ * Copyright 2015 wenshuo, Inc. All rights reserved. * wenshuo PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ + package com.wenshuo.agent.log; +import com.wenshuo.agent.applog.AppLogFactory; +import com.wenshuo.agent.applog.IAppLog; + /** * OutputLogRunnable - * + * * @author dingjsh * @time 2015-7-28下午03:27:20 */ public class OutputLogRunnable implements Runnable { - /* - * (non-Javadoc) - * - * @see java.lang.Runnable#run() - */ + private static IAppLog log = AppLogFactory.getAppLog(OutputLogRunnable.class); + @Override public void run() { - try{ + try { ExecuteLogUtils.outputCounterLog(); - }catch(Exception e){ - System.err.println(e); + } catch (Exception e) { + log.error(e.getMessage(), e); } } diff --git a/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java index 545b231..6602f06 100644 --- a/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ b/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -1,7 +1,16 @@ package com.wenshuo.agent.transformer; +import java.io.IOException; +import java.lang.instrument.ClassFileTransformer; +import java.security.ProtectionDomain; +import java.util.Collections; +import java.util.Set; +import java.util.regex.Pattern; + import com.wenshuo.agent.ConfigUtils; import com.wenshuo.agent.PojoDetector; +import com.wenshuo.agent.applog.AppLogFactory; +import com.wenshuo.agent.applog.IAppLog; import com.wenshuo.agent.javassist.CannotCompileException; import com.wenshuo.agent.javassist.ClassPool; import com.wenshuo.agent.javassist.CtClass; @@ -9,16 +18,10 @@ import com.wenshuo.agent.javassist.LoaderClassPath; import com.wenshuo.agent.javassist.Modifier; import com.wenshuo.agent.javassist.NotFoundException; -import java.io.IOException; -import java.lang.instrument.ClassFileTransformer; -import java.security.ProtectionDomain; -import java.util.Collections; -import java.util.Set; -import java.util.regex.Pattern; /** * AgentLogClassFileTransformer 类增强，增加agent日志 - * + * * @author dingjsh * @time 2015-7-24上午09:53:44 */ @@ -28,9 +31,10 @@ public class AgentLogClassFileTransformer implements ClassFileTransformer { private static final String AGENT_PACKAGE_NAME = "com.wenshuo.agent"; + private static IAppLog log = AppLogFactory.getAppLog(AgentLogClassFileTransformer.class); public byte[] transform(ClassLoader loader, String className, Class classBeingRedefined, - ProtectionDomain protectionDomain, byte[] classfileBuffer) { + ProtectionDomain protectionDomain, byte[] classfileBuffer) { byte[] byteCode = classfileBuffer; className = className.replace('/', '.'); if (!isNeedLogExecuteInfo(className)) { @@ -55,7 +59,7 @@ private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { } byteCode = aopLog(cc, className, byteCode); } catch (Exception ex) { - System.err.println(ex); + log.error(ex.getMessage(), ex); } return byteCode; } @@ -91,19 +95,20 @@ private void aopLog(String className, CtMethod m) throws CannotCompileException boolean isMethodStatic = Modifier.isStatic(m.getModifiers()); String aopClassName = isMethodStatic ? "\"" + className + "\"" : "this.getClass().getName()"; final String timeMethodStr - = ConfigUtils.isUsingNanoTime() ? "java.lang.System.nanoTime()" : "java.lang.System.currentTimeMillis()"; + = ConfigUtils.isUsingNanoTime() ? "java.lang.System.nanoTime()" : "java.lang.System.currentTimeMillis" + + "()"; // 避免变量名重复 m.addLocalVariable("dingjsh_javaagent_elapsedTime", CtClass.longType); m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;"); m.insertAfter(LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() - + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); + + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); } /** * 是否需要记录执行信息 - * + * * @param className 类名 * @return 是否需要记录执行信息 * @author dingjsh @@ -152,4 +157,5 @@ private boolean isNeedLogExecuteInfo(String className) { } return isNeeded; } + } From cf8b05b884f9e04d7d6d35115e39ecde4ce31443 Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Fri, 6 Sep 2024 11:39:15 +0800 Subject: [PATCH 20/25] =?UTF-8?q?feat=EF=BC=9A=E6=B7=BB=E5=8A=A0=E6=96=B9?= =?UTF-8?q?=E6=B3=95=E6=89=A7=E8=A1=8C=E6=97=B6=E9=97=B4=E7=99=BE=E5=88=86?= =?UTF-8?q?=E6=AF=94=E7=BB=9F=E8=AE=A1=EF=BC=8C=E4=B8=8EJMeter=E6=80=A7?= =?UTF-8?q?=E8=83=BD=E6=8A=A5=E5=91=8A=E7=BB=9F=E8=AE=A1=E6=96=B9=E5=BC=8F?= =?UTF-8?q?=E4=B8=80=E8=87=B4?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 1 + README.md | 4 + pom.xml | 32 ++++- .../java/com/wenshuo/agent/AgentUtils.java | 2 +- .../java/com/wenshuo/agent/ConfigConsts.java | 6 + .../java/com/wenshuo/agent/ConfigUtils.java | 24 ++++ .../wenshuo/agent/log/ExecuteLogUtils.java | 68 +++++++--- .../agent/log/MethodExecuteJSONformatter.java | 32 ++++- src/main/resources/agent.properties | 4 + .../com/wenshuo/agent/test/TestCtMethod.java | 128 +++++++++++++++++- 10 files changed, 271 insertions(+), 30 deletions(-) diff --git a/.gitignore b/.gitignore index 3a8beb1..5a452fe 100644 --- a/.gitignore +++ b/.gitignore @@ -19,4 +19,5 @@ target/maven-archiver/pom.properties /.settings /.idea *.log +dependency-reduced-pom.xml diff --git a/README.md b/README.md index 84f08d7..072292e 100644 --- a/README.md +++ b/README.md @@ -21,6 +21,10 @@ agent.exclude.class.regex= agent.log.avg.execute.time=false # 记录方法的耗时时是采用nanoTime,还是currentTimeMillis,nanoTime更准确，但是会耗时一些 agent.log.nano=true +# 是否统计方法执行时间百分比，同JMeter性能测试百分比计算方式，如果开启默认会统计最大值、最小值 +agent.log.stat.execute.time=false +# 方法执行时间统计百分比（agent.log.stat.execute.time=true时有效），多选范围[0, 1]，例如：0.5,0.9,0.95,0.99 +agent.log.stat.execute.time.pct=0.5,0.9,0.95,0.99 ``` ## agent日志分析器使用 diff --git a/pom.xml b/pom.xml index 7a93d28..5854424 100644 --- a/pom.xml +++ b/pom.xml @@ -4,7 +4,7 @@ com.wenshuo javaagent - 2.1.2 + 2.1.3 jar javaagent @@ -45,6 +45,31 @@ + + org.apache.maven.plugins + maven-shade-plugin + 3.1.1 + + + package + + shade + + + + + com.tdunning:t-digest + + + + + ccom.wenshuo.agent.Agent + + + + + + org.apache.maven.plugins maven-compiler-plugin @@ -86,5 +111,10 @@ compile true + + com.tdunning + t-digest + 3.3 + diff --git a/src/main/java/com/wenshuo/agent/AgentUtils.java b/src/main/java/com/wenshuo/agent/AgentUtils.java index e133898..6c6a871 100644 --- a/src/main/java/com/wenshuo/agent/AgentUtils.java +++ b/src/main/java/com/wenshuo/agent/AgentUtils.java @@ -69,7 +69,7 @@ public static boolean isBlank(String str) { * whitespace * @since 2.0 */ - static boolean isNotBlank(String str) { + public static boolean isNotBlank(String str) { return !isBlank(str); } diff --git a/src/main/java/com/wenshuo/agent/ConfigConsts.java b/src/main/java/com/wenshuo/agent/ConfigConsts.java index 6edd2c4..4bac970 100644 --- a/src/main/java/com/wenshuo/agent/ConfigConsts.java +++ b/src/main/java/com/wenshuo/agent/ConfigConsts.java @@ -34,6 +34,12 @@ public interface ConfigConsts { String LOG_TIME_NANO = "agent.log.nano"; + /** 是否统计方法执行时间百分比，同JMeter性能测试百分比计算方式，如果开启默认会统计最大值、最小值*/ + String LOG_STAT_EXECUTE_TIME = "agent.log.stat.execute.time"; + + /** 方法执行时间统计百分比（agent.log.stat.execute.time=true时有效），多选范围[0, 1]，例如：0.5,0.9,0.95,0.99 */ + String LOG_STAT_EXECUTE_TIME_PCT = "agent.log.stat.execute.time.pct"; + int DEFAULT_LOG_INTERVAL = 600; } diff --git a/src/main/java/com/wenshuo/agent/ConfigUtils.java b/src/main/java/com/wenshuo/agent/ConfigUtils.java index e086fc2..73af9dc 100644 --- a/src/main/java/com/wenshuo/agent/ConfigUtils.java +++ b/src/main/java/com/wenshuo/agent/ConfigUtils.java @@ -164,4 +164,28 @@ public static boolean isUsingNanoTime() { return "true".equalsIgnoreCase(value); } + /** + * ConfigUtils + * + * @author fanzhongwei + * @return boolean 是否统计方法执行时间百分比，同JMeter性能测试百分比计算方式 + * @date 2024/9/5 下午7:12 + **/ + public static boolean isLogStatExecuteTime() { + String value = getProperty(ConfigConsts.LOG_STAT_EXECUTE_TIME); + return "true".equalsIgnoreCase(value); + } + + /** + * ConfigUtils + * + * @author fanzhongwei + * @return boolean 方法执行时间统计百分比（agent.log.stat.execute.time=true时有效），多选范围[0, 1]，例如：0.5,0.9,0.95,0.99 + * @date 2024/9/5 下午7:13 + **/ + public static String getLogStatExecuteTimePct() { + String value = getProperty(ConfigConsts.LOG_STAT_EXECUTE_TIME_PCT); + return value; + } + } diff --git a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java index 624d8c1..8ac2305 100644 --- a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -22,6 +22,7 @@ import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; +import com.tdunning.math.stats.MergingDigest; import com.wenshuo.agent.AgentUtils; import com.wenshuo.agent.ConfigUtils; import com.wenshuo.agent.NamedThreadFactory; @@ -46,7 +47,8 @@ public class ExecuteLogUtils { private static ScheduledThreadPoolExecutor counterLogExecutor; - private static ConcurrentHashMap> executeCounterMap; + // Map > + private static ConcurrentHashMap> executeCounterMap; private static final Object executeCounterLock = new Object(); @@ -58,6 +60,10 @@ public class ExecuteLogUtils { private static boolean logAvgExecuteTime = false; + private static boolean logStatExecuteTime = false; + + private static double[] logStatExecuteTimePct = new double[] {0.5, 0.9, 0.95, 0.99}; + private static volatile boolean isInitialized = false; private static final IAppLog log = AppLogFactory.getAppLog(ExecuteLogUtils.class); @@ -80,13 +86,22 @@ public static synchronized void init() { int interval = ConfigUtils.getLogInterval(); logAvgExecuteTime = ConfigUtils.isLogAvgExecuteTime(); isUsingNanoTime = ConfigUtils.isUsingNanoTime(); + logStatExecuteTime = ConfigUtils.isLogStatExecuteTime(); + String statPct = ConfigUtils.getLogStatExecuteTimePct(); + if (AgentUtils.isNotBlank(statPct)) { + String[] pctArr = statPct.split(","); + logStatExecuteTimePct = new double[pctArr.length]; + for (int i = 0; i < pctArr.length; i++) { + logStatExecuteTimePct[i] = Double.parseDouble(pctArr[i]); + } + } if (AgentUtils.isBlank(logFileName)) { log.error("日志文件名为空"); throw new RuntimeException("日志文件名为空"); } setNextDateStartTimeMillis(); initWriter(); - executeCounterMap = new ConcurrentHashMap>(); + executeCounterMap = new ConcurrentHashMap>(); startTimeMillis = System.currentTimeMillis(); counterLogExecutor = new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("pool-thread-agent-log", true)); counterLogExecutor.scheduleWithFixedDelay(new OutputLogRunnable(), interval, interval, TimeUnit.SECONDS); @@ -94,7 +109,11 @@ public static synchronized void init() { } public static void log(String className, String methodName, long executeTime) { - logExecuteCounter(className, methodName, executeTime); + try { + logExecuteCounter(className, methodName, executeTime); + } catch (Exception e) { + log.error("记录方法执行日志失败", e); + } } /** @@ -104,8 +123,8 @@ public static void log(String className, String methodName, long executeTime) { * @time 2015-7-28下午01:35:25 */ synchronized static void outputCounterLog() throws IOException { - ConcurrentHashMap> executeCounterMapInner = executeCounterMap; - executeCounterMap = new ConcurrentHashMap>(); + ConcurrentHashMap> executeCounterMapInner = executeCounterMap; + executeCounterMap = new ConcurrentHashMap>(); String startTime = formatTimeMillis(startTimeMillis); String endTime = formatTimeMillis(System.currentTimeMillis()); long byteLength = removeJSONArrayEndBracket(); @@ -113,18 +132,18 @@ synchronized static void outputCounterLog() throws IOException { writeLog("[", true, startTimeMillis); } - Set>> entrySet = executeCounterMapInner.entrySet(); - Iterator>> ite = entrySet.iterator(); + Set>> entrySet = executeCounterMapInner.entrySet(); + Iterator>> ite = entrySet.iterator(); int length = entrySet.size(); if (length > 0 && byteLength > 10) { // 说明文件不只是[],json数组中已经有内容 writeLog(",", startTimeMillis); } for (int index = 0; ite.hasNext(); index++) { - Map.Entry> entry = ite.next(); + Map.Entry> entry = ite.next(); String className = entry.getKey(); - Map method2ExecuteMap = entry.getValue(); + Map method2ExecuteMap = entry.getValue(); String methodExecuteJson = MethodExecuteJSONformatter.getMethodExecuteJSON(className, method2ExecuteMap, - startTime, endTime, isUsingNanoTime, logAvgExecuteTime); + startTime, endTime, isUsingNanoTime, logAvgExecuteTime, logStatExecuteTime, logStatExecuteTimePct); writeLog(methodExecuteJson, startTimeMillis); if (index < length - 1) { writeLog(",", true, startTimeMillis); @@ -138,13 +157,26 @@ synchronized static void outputCounterLog() throws IOException { private static void logExecuteCounter(String className, String methodName, long executeTime) { // dingjs modified in 20210825 原来是用锁和AtomicLong来避免线程安全问题，现在去掉这些实现。原因是此处线程安全问题顶多导致 // 数据有一些误差，这个误差对于agent数据监控并没有什么影响，牺牲一定的准确性带来性能的提升是有必要的 - ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); - long[] counter = methodCounterMap.get(methodName); + ConcurrentHashMap methodCounterMap = getOrCreateClassExecutesMapping(className); + Object[] counter = methodCounterMap.get(methodName); if (null == counter) { - methodCounterMap.put(methodName, new long[] {1, executeTime}); + MergingDigest md = null; + if (logStatExecuteTime) { + int compression = 150; + int factor = 5; + md = new MergingDigest(compression, (factor + 1) * compression, compression); + } + methodCounterMap.put(methodName, new Object[] {1L, executeTime, md}); } else { - counter[0]++; - counter[1] = executeTime + counter[1]; + counter[0] = (Long) counter[0] + 1L; + counter[1] = executeTime + (Long) counter[1]; + if (logStatExecuteTime) { + MergingDigest md = (MergingDigest) counter[2]; + // MergingDigest需要线程安全 + synchronized (md) { + md.add(executeTime); + } + } } } @@ -158,13 +190,13 @@ private static void logExecuteCounter(String className, String methodName, long * @date 2018年5月25日 下午4:40:33 * @version 1.2.0 */ - private static ConcurrentHashMap getOrCreateClassExecutesMapping(String className) { - ConcurrentHashMap methodCounterMap = executeCounterMap.get(className); + private static ConcurrentHashMap getOrCreateClassExecutesMapping(String className) { + ConcurrentHashMap methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { synchronized (executeCounterLock) { methodCounterMap = executeCounterMap.get(className); if (null == methodCounterMap) { - methodCounterMap = new ConcurrentHashMap(); + methodCounterMap = new ConcurrentHashMap(); executeCounterMap.put(className, methodCounterMap); } } diff --git a/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java index 13e1454..fa28d2e 100644 --- a/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java +++ b/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java @@ -1,5 +1,7 @@ package com.wenshuo.agent.log; +import com.tdunning.math.stats.MergingDigest; + import java.util.Map; @@ -17,7 +19,7 @@ class MethodExecuteJSONformatter { * MethodExecuteJSONformatter * * @param className 类名 - * @param method2ExecuteMap Map<方法名, Long[]> 数组第一个是执行次数，第二个是执行时间 + * @param method2ExecuteMap Map<方法名, Object[]> 数组第一个是执行次数，第二个是执行时间，第三个是方法执行时间统计（MergingDigest, 根据配置可选） * @param startTime 统计周期的开始时间，格式为 yyyy-MM-dd HH:mm:ss * @param endTime 统计周期的结束时间，格式为 yyyy-MM-dd HH:mm:ss * @return 格式化后的json string @@ -26,19 +28,21 @@ class MethodExecuteJSONformatter { * @date 2018年8月22日 下午8:49:18 * @version 2.0.0 */ - static String getMethodExecuteJSON(String className, Map method2ExecuteMap, - String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime) { + static String getMethodExecuteJSON(String className, Map method2ExecuteMap, + String startTime, String endTime, boolean isUsingNanoTime, boolean logAvgExecuteTime, + boolean logStatExecuteTime, double[] logStatExecuteTimePct) { StringBuilder json = new StringBuilder("{"); appendString(json, "class", className).append(","); appendString(json, "start", startTime).append(","); appendString(json, "end", endTime).append(","); appendKey(json, "methods").append("["); - for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { + for (Map.Entry methodEntry : method2ExecuteMap.entrySet()) { String methodName = methodEntry.getKey(); - long[] executeCounter = methodEntry.getValue(); - long counter = executeCounter[0]; + Object[] executeCounter = methodEntry.getValue(); + Long counter = (Long) executeCounter[0]; + Long totalTime = (Long) executeCounter[1]; long timeInMillis - = isUsingNanoTime ? executeCounter[1] / 1000000 : executeCounter[1]; + = isUsingNanoTime ? totalTime / 1000000 : totalTime; json.append("{"); appendString(json, "name", methodName).append(","); appendLong(json, "counter", counter).append(","); @@ -47,6 +51,20 @@ static String getMethodExecuteJSON(String className, Map method2 json.append(","); appendLong(json, "avg", timeInMillis / counter); } + if (logStatExecuteTime && counter > 0) { + MergingDigest md = (MergingDigest)executeCounter[2]; + json.append(","); + appendLong(json, "min", (long) md.getMin()); + + for (int i = 0; i < logStatExecuteTimePct.length; i++) { + double pct = logStatExecuteTimePct[i]; + json.append(","); + appendLong(json, "th" + (int)(pct * 100), (long) md.quantile(pct)); + } + + json.append(","); + appendLong(json, "max", (long) md.getMax()); + } json.append("},"); } if (json.charAt(json.length() - 1) == ',') { diff --git a/src/main/resources/agent.properties b/src/main/resources/agent.properties index 2117cd7..d5cb9f9 100644 --- a/src/main/resources/agent.properties +++ b/src/main/resources/agent.properties @@ -14,3 +14,7 @@ agent.log.avg.execute.time=false agent.exclude.class.regex.default=.*EnhancerByCGLIB.*;.*FastClassByCGLIB.*;.*EnhancerBySpringCGLIB.*;.*FastClassBySpringCGLIB.* #\u8bb0\u5f55\u65b9\u6cd5\u7684\u8017\u65f6\u65f6\u662f\u91c7\u7528nanoTime,\u8fd8\u662fcurrentTimeMillis,nanoTime\u66f4\u51c6\u786e\uff0c\u4f46\u662f\u4f1a\u8017\u65f6\u4e00\u4e9b agent.log.nano=true +#\u662f\u5426\u7edf\u8ba1\u65b9\u6cd5\u6267\u884c\u65f6\u95f4\u767e\u5206\u6bd4\uff0c\u540cJMeter\u6027\u80fd\u6d4b\u8bd5\u767e\u5206\u6bd4\u8ba1\u7b97\u65b9\u5f0f\uff0c\u5982\u679c\u5f00\u542f\u9ed8\u8ba4\u4f1a\u7edf\u8ba1\u6700\u5927\u503c\u3001\u6700\u5c0f\u503c +agent.log.stat.execute.time=false +#\u65b9\u6cd5\u6267\u884c\u65f6\u95f4\u7edf\u8ba1\u767e\u5206\u6bd4\uff08agent.log.stat.execute.time=true\u65f6\u6709\u6548\uff09\uff0c\u591a\u9009\u8303\u56f4[0, 1]\uff0c\u4f8b\u5982\uff1a0.5,0.9,0.95,0.99 +agent.log.stat.execute.time.pct=0.5,0.9,0.95,0.99 \ No newline at end of file diff --git a/src/test/java/com/wenshuo/agent/test/TestCtMethod.java b/src/test/java/com/wenshuo/agent/test/TestCtMethod.java index ecca591..66ec31a 100644 --- a/src/test/java/com/wenshuo/agent/test/TestCtMethod.java +++ b/src/test/java/com/wenshuo/agent/test/TestCtMethod.java @@ -1,9 +1,17 @@ package com.wenshuo.agent.test; +import java.util.ArrayList; import java.util.Arrays; import java.util.List; +import java.util.Random; +import java.util.concurrent.*; +import com.tdunning.math.stats.Centroid; +import com.tdunning.math.stats.Dist; +import com.tdunning.math.stats.MergingDigest; +import com.tdunning.math.stats.ScaleFunction; import org.junit.Assert; +import org.junit.Ignore; import org.junit.Test; import com.wenshuo.agent.javassist.ClassPool; @@ -44,7 +52,121 @@ public static void publicStatic(){ static void defaultStatic(){ System.out.println("I'm default and static"); } - - - + + + /** + * 100个线程并发测试，每个线程往100个不同的Digest中添加5000000个随机数据[0, 100]，并计算耗时
+ * 内存限制：-Xms50m -Xmx50m + * + * 测试结论：从统计值来看，统计结果基本符合预期，并且耗时基本在800ms~1000ms，未发生内存溢出，初步评估可以加入到javaagent方法耗时统计中并且对性能影响在可控范围内
+ * 部分统计结果如下：
+ * MIN 10th pct 20th pct 25th pct 50th pct 75th pct 90th pct 95th pct 99th pct MAX 耗时
+ * ========== ========== ========== ========== ========== ========== ========== ========== ========== ========== ==========
+ * 0 10 20 25 50 75 90 95 99 100 942
+ * 0 10 20 25 50 75 90 95 99 100 869
+ * 0 10 20 25 50 75 90 95 99 100 939
+ * 0 10 20 25 50 75 90 95 99 100 895
+ * 0 10 20 25 50 75 90 95 99 100 942
+ * 0 10 20 25 50 75 90 95 99 100 845
+ * 0 10 20 25 50 75 90 95 99 100 887
+ * 0 10 20 25 50 75 90 95 99 100 898
+ * 0 10 20 25 50 75 90 95 99 100 911
+ * 0 10 20 25 50 75 90 95 99 100 815
+ * 0 10 20 25 50 75 90 95 99 100 762
+ * 0 10 20 25 50 75 90 95 99 100 893
+ * 0 10 20 25 50 75 90 95 99 100 933
+ * 0 10 20 25 50 75 90 95 99 100 866
+ * 0 10 20 25 50 75 90 95 99 100 863
+ * 0 10 20 25 50 75 90 95 99 100 920
+ * 0 10 20 25 50 75 90 95 99 100 830
+ * 0 10 20 25 50 75 90 95 99 100 870
+ * 0 10 20 25 50 75 90 95 100 100 913
+ * + * + * @return void + * @date 2024/9/5 下午6:41 + **/ + @Test + @Ignore + public void testMethodPctCounter() { + int compression = 150; + int factor = 5; + + final int M = 100; + final List mds = new ArrayList(M); + final long[] counts = new long[M]; + for (int i = 0; i < M; ++i) { + mds.add(new MergingDigest(compression, (factor + 1) * compression, compression)); + counts[i] = 0; + } + + // Fill all digests with random values (0~100). + final Random random = new Random(); + + ThreadPoolExecutor executorService = new ThreadPoolExecutor( + 100, + 100, + 0, + TimeUnit.MINUTES, + new ArrayBlockingQueue(1000), + new ThreadPoolExecutor.CallerRunsPolicy()); + for (int i = 0; i < 5000000; ++i) { + executorService.execute((new Runnable() { + @Override + public void run() { + for (int j = 0; j < M; ++j) { + MergingDigest md = mds.get(j); + synchronized (md) { + int data = random.nextInt(101); + long start = System.currentTimeMillis(); + md.add(data); + counts[j] = counts[j] + (System.currentTimeMillis() - start); + } + } + } + })); + } + while (true) { + if (executorService.getActiveCount() != 0) { + try { + Thread.sleep(100); + } catch (InterruptedException e) { + e.printStackTrace(); + } + } else { + break; + } + } + executorService.shutdown(); + + // Output + double[] qArr = new double[]{0.1, 0.2, 0.25, 0.5, 0.75, 0.90, 0.95, 0.99}; + System.out.printf("%10s\t", "MIN"); + for (int i = 0 ; i < qArr.length; ++i) { + System.out.printf("%4sth pct\t", (int)(qArr[i] * 100)); + } + System.out.printf("%10s\t", "MAX"); + System.out.printf("%10s\t", "耗时"); + System.out.println(); + for (int i = 0 ; i < 11; ++i) { + System.out.print("==========\t"); + } + System.out.println(); + + + for (int i = 0; i < mds.size(); ++i) { + MergingDigest md = mds.get(i); + System.out.printf("%10.0f\t", md.getMin()); + long start = System.currentTimeMillis(); + for (double q : qArr) { + System.out.printf("%10.0f\t", md.quantile(q)); + } + counts[i] = counts[i] + (System.currentTimeMillis() - start); + System.out.printf("%10.0f\t", md.getMax()); + System.out.printf("%10d\t", counts[i]); + System.out.println(); + } + + } + } From c9dcb8487b292070912398a85bec4ef776e45aab Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Fri, 6 Sep 2024 18:38:28 +0800 Subject: [PATCH 21/25] =?UTF-8?q?=E8=B0=83=E6=95=B4=E9=A1=B9=E7=9B=AE?= =?UTF-8?q?=E7=9B=AE=E5=BD=95=E7=BB=93=E6=9E=84=EF=BC=8C=E6=B7=BB=E5=8A=A0?= =?UTF-8?q?agent=E6=97=A5=E5=BF=97=E5=88=86=E6=9E=90=E5=B7=A5=E5=85=B7?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 4 +- agent-analyer/agent-analyzer.iml | 99 ++ agent-analyer/pom.xml | 138 +++ .../wenshuo/agent/analyzer/AgentAnalyzer.java | 18 + .../agent/analyzer/bean/AgentLogDO.java | 65 + .../agent/analyzer/bean/ClassBean.java | 39 + .../agent/analyzer/bean/MethodBean.java | 45 + .../configuration/MvcConfiguration.java | 104 ++ .../controller/CheckLogFileController.java | 187 +++ 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agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/javassist/util/proxy/package.html (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/log/OutputLogRunnable.java (100%) rename {src => agent/src}/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java (100%) rename {src => agent/src}/main/resources/agent.properties (100%) rename {src => agent/src}/test/java/com/wenshuo/agent/test/TestCtMethod.java (100%) diff --git a/.gitignore b/.gitignore index 5a452fe..07f590f 100644 --- a/.gitignore +++ b/.gitignore @@ -15,9 +15,9 @@ target/maven-archiver/pom.properties *.prefs *.project .classpath -/target +target /.settings -/.idea +.idea *.log dependency-reduced-pom.xml diff --git a/agent-analyer/agent-analyzer.iml b/agent-analyer/agent-analyzer.iml new file mode 100644 index 0000000..591b2be --- /dev/null +++ b/agent-analyer/agent-analyzer.iml @@ -0,0 +1,99 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + \ No newline at end of file diff --git a/agent-analyer/pom.xml b/agent-analyer/pom.xml new file mode 100644 index 0000000..db7e3bc --- /dev/null +++ b/agent-analyer/pom.xml @@ -0,0 +1,138 @@ + + 4.0.0 + + com.wenshuo + agent-analyzer + 1.0.0 + war + + agent日志分析器 + + + UTF-8 + 1.8 + 2.6.7 + 1.2.83 + 2.15.1 + + + + + + + org.springframework.boot + spring-boot-dependencies + ${springboot.version} + pom + import + + + + + + + org.projectlombok + lombok + + + org.springframework.boot + spring-boot-starter-web + + + org.apache.commons + commons-lang3 + + + + + + + + + + com.alibaba + fastjson + ${fastjson.version} + + + + org.springframework.boot + spring-boot-starter-data-jpa + + + + com.h2database + h2 + runtime + + + + commons-io + commons-io + ${commons-io.version} + + + commons-logging + commons-logging + 1.2 + compile + + + + + agent-analyzer + + + src/main/java + + **/*.xml + + + + ${basedir}/src/main/webapp + META-INF/resources + + **/** + + + + src/main/resources + false + + .gitkeep + + + ** + + + + + + org.apache.maven.plugins + maven-compiler-plugin + 3.8.1 + + ${java.version} + ${java.version} + + + + org.springframework.boot + spring-boot-maven-plugin + ${springboot.version} + + + + repackage + + + + + com.wenshuo.agent.analyzer.AgentAnalyzer + true + + + + + diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/AgentAnalyzer.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/AgentAnalyzer.java new file mode 100644 index 0000000..e5676d4 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/AgentAnalyzer.java @@ -0,0 +1,18 @@ +package com.wenshuo.agent.analyzer; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +/** + * agent日志分析 + * + * @date 2024/09/06 13:52 + **/ +@SpringBootApplication + +public class AgentAnalyzer { + public static void main(String[] args) { + SpringApplication.run(AgentAnalyzer.class, args); + } + +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/AgentLogDO.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/AgentLogDO.java new file mode 100644 index 0000000..69a24d3 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/AgentLogDO.java @@ -0,0 +1,65 @@ +package com.wenshuo.agent.analyzer.bean; + +import com.alibaba.fastjson.annotation.JSONField; +import lombok.AllArgsConstructor; +import lombok.Data; +import lombok.NoArgsConstructor; + +import java.util.Date; +import java.util.UUID; +import javax.persistence.Entity; +import javax.persistence.GeneratedValue; +import javax.persistence.Id; +import javax.persistence.Table; + +/** + * @date 2024/09/06 14:05 + **/ +@Entity +@Table(name = "T_AGENT_LOG") +@Data +@NoArgsConstructor +@AllArgsConstructor +public class AgentLogDO { + + @Id + @GeneratedValue + private UUID id; + + private Date startTime; + + private Date endTime; + + @JSONField(name = "class") + private String className; + + private String methodName; + + private Long counter; + + private Long time; + + private Long avg; + + private Long min; + + private Long max; + + private Long median; + + private Long th90Pct; + + private Long th95Pct; + + private Long th99Pct; + + private String version; + + private String day; + + private String startAndEnd; + + private String fileName; + + private String timeCut; +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/ClassBean.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/ClassBean.java new file mode 100644 index 0000000..aed66bc --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/ClassBean.java @@ -0,0 +1,39 @@ +package com.wenshuo.agent.analyzer.bean; + +import com.alibaba.fastjson.annotation.JSONField; +import lombok.AllArgsConstructor; +import lombok.Data; +import lombok.NoArgsConstructor; + +import java.util.Date; + +/** + * @date 2024/09/06 14:09 + **/ +@Data +@NoArgsConstructor +@AllArgsConstructor +public class ClassBean { + + private String bh; + + private Date startTime; + + private String start; + + private Date endTime; + + private String end; + + @JSONField(name = "class") + private String className; + + @JSONField(name = "methods") + private String methods; + + private String version; + + private String day; + + private String startAndEnd; +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/MethodBean.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/MethodBean.java new file mode 100644 index 0000000..828a335 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/bean/MethodBean.java @@ -0,0 +1,45 @@ +package com.wenshuo.agent.analyzer.bean; + +import com.alibaba.fastjson.annotation.JSONField; +import lombok.AllArgsConstructor; +import lombok.Data; +import lombok.NoArgsConstructor; + +/** + * @date 2024/09/06 14:10 + **/ +@Data +@NoArgsConstructor +@AllArgsConstructor +public class MethodBean { + + @JSONField(name = "name") + private String methodName; + + @JSONField(name = "time") + private Long time; + + @JSONField(name = "avg") + private Long avg; + + @JSONField(name = "counter") + private Long counter; + + @JSONField(name = "min") + private Long min; + + @JSONField(name = "max") + private Long max; + + @JSONField(name = "th50") + private Long median; + + @JSONField(name = "th90") + private Long th90Pct; + + @JSONField(name = "th95") + private Long th95Pct; + + @JSONField(name = "th99") + private Long th99Pct; +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/configuration/MvcConfiguration.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/configuration/MvcConfiguration.java new file mode 100644 index 0000000..60f705a --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/configuration/MvcConfiguration.java @@ -0,0 +1,104 @@ +package com.wenshuo.agent.analyzer.configuration; + +import com.alibaba.fastjson.serializer.SerializeConfig; +import com.alibaba.fastjson.serializer.SerializerFeature; +import com.alibaba.fastjson.support.config.FastJsonConfig; +import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter; +import org.springframework.context.annotation.Bean; +import org.springframework.http.MediaType; +import org.springframework.http.converter.HttpMessageConverter; +import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; +import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; +import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; +import org.springframework.web.servlet.view.InternalResourceViewResolver; +import org.springframework.web.servlet.view.JstlView; + +import java.nio.charset.StandardCharsets; +import java.time.LocalDateTime; +import java.util.ArrayList; +import java.util.Date; +import java.util.List; + +/** + * @date 2024/09/06 13:59 + **/ +public class MvcConfiguration extends WebMvcConfigurationSupport { + + @Override + public void addResourceHandlers(ResourceHandlerRegistry registry) { + registry.addResourceHandler("/*", "/", "").addResourceLocations("classpath:/static/index.html"); + registry.addResourceHandler("/**").addResourceLocations("classpath:/static/"); + registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/"); + registry.addResourceHandler("/swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/"); + registry.addResourceHandler("/doc.html").addResourceLocations("classpath:/META-INF/resources/"); + registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/"); + super.addResourceHandlers(registry); + } + + @Override + public void addViewControllers(ViewControllerRegistry registry) { + registry.addViewController("/").setViewName("index"); + } + + @Bean + public InternalResourceViewResolver viewResolver() { + InternalResourceViewResolver viewResolver = new InternalResourceViewResolver(); + viewResolver.setPrefix("/static/"); + viewResolver.setSuffix(".html"); + + return viewResolver; + } + + /** + * 配置fastjson方式一：(map集合)保留非实体构造方法的null，构造方法中的null格式化为——"" + * 配置fastjson方式二：在SpringBoot启动类中(@SpringBootApplication)，注入Bean: HttpMessageConverters + * (list集合+单个对象实例) 中的null，均能够格式为——"" + * + * @param converters + */ + @Override + public void configureMessageConverters(List> converters) { + //创建会话消息实例容器 + FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter(); + //创建fastJson配置实例 + FastJsonConfig config = new FastJsonConfig(); + config.setSerializerFeatures( + //全局修改日期格式,如果时间是data、时间戳类型，按照这种格式初始化时间 "yyyy-MM-dd HH:mm:ss" + SerializerFeature.WriteDateUseDateFormat, + // 保留 Map 空的字段 + SerializerFeature.WriteMapNullValue, + // 将 String 类型的 null 转成"" + SerializerFeature.WriteNullStringAsEmpty, + // 将 List 类型的 null 转成 [] + SerializerFeature.WriteNullListAsEmpty, + // 将 Boolean 类型的 null 转成 false + SerializerFeature.WriteNullBooleanAsFalse, + // 避免循环引用 + SerializerFeature.DisableCircularReferenceDetect, + //返回Json数据排版格式 + SerializerFeature.PrettyFormat, + // 去除循环引用 + SerializerFeature.DisableCircularReferenceDetect, + // 序列化枚举时使用toString方法 + SerializerFeature.WriteEnumUsingToString + ); + + SerializeConfig serializeConfig = SerializeConfig.globalInstance; + config.setSerializeConfig(serializeConfig); + + + //按字段名称排序后输出-SerializerFeature.SortField + //设置配置实例 + converter.setFastJsonConfig(config); + //设置默认编码方式 + converter.setDefaultCharset(StandardCharsets.UTF_8); + //集合填入媒介类型 + List mediaTypeList = new ArrayList<>(); + // 解决中文乱码问题，相当于在 Controller 上的 @RequestMapping 中加了个属性 produces = "application/json" + mediaTypeList.add(MediaType.APPLICATION_JSON); + //设置支持媒介——装载了解决中文乱码参数 + converter.setSupportedMediaTypes(mediaTypeList); + //添加到会话中 + converters.add(converter); + } +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/CheckLogFileController.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/CheckLogFileController.java new file mode 100644 index 0000000..4c2d696 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/CheckLogFileController.java @@ -0,0 +1,187 @@ +package com.wenshuo.agent.analyzer.controller; + + +import com.alibaba.fastjson.JSON; +import com.alibaba.fastjson.JSONObject; +import java.io.IOException; +import java.text.ParseException; +import java.util.*; + +import com.wenshuo.agent.analyzer.bean.AgentLogDO; +import com.wenshuo.agent.analyzer.dao.LogFileDao; +import com.wenshuo.agent.analyzer.service.LogFileService; +import org.apache.commons.lang3.StringUtils; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.data.domain.Example; +import org.springframework.data.domain.ExampleMatcher; +import org.springframework.data.domain.Page; +import org.springframework.data.domain.Pageable; +import org.springframework.stereotype.Controller; +import org.springframework.ui.Model; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.ResponseBody; +import org.springframework.web.multipart.MultipartFile; + +@Controller +@RequestMapping({"/logFileAnalysis"}) +public class CheckLogFileController { + @Autowired + private LogFileDao logFileDao; + + @Autowired + private LogFileService logFileService; + + @RequestMapping({"/upload"}) + @ResponseBody + public JSONObject uploadAndAnalysis(MultipartFile[] file) throws ParseException, IOException { + JSONObject json = new JSONObject(); + boolean success = this.logFileService.saveFileInfoToDatabase(file[0], json); + if (success) { + json.put("code", Integer.valueOf(0)); + } else { + json.put("code", Integer.valueOf(1)); + } + return json; + } + + @RequestMapping({"deleteFiles"}) + @ResponseBody + public Object deleteFiles(String files) { + JSONObject json = new JSONObject(); + try { + this.logFileDao.deleteFiles(files); + json.put("code", Integer.valueOf(0)); + } catch (Exception e) { + json.put("code", Integer.valueOf(1)); + } + return json; + } + + @RequestMapping({"getDays"}) + @ResponseBody + public String getDays() { + List list = this.logFileDao.findFileList(); + return JSONObject.toJSONString(list); + } + + @RequestMapping({"toResultPage"}) + public String toResultPage(Model model, Integer page, String type, String order, String methodName, String className) { + model.addAttribute("methodName", methodName); + model.addAttribute("className", className); + return "html/result"; + } + + @RequestMapping({"toClassResultPage"}) + public String toClassResultPage(Model model, Integer page, String type, String order, String className) { + List findOne = this.logFileService.getDataInfo(null, className); + model.addAttribute("data", JSONObject.toJSONString(findOne)); + model.addAttribute("className", className); + return "html/result"; + } + + @RequestMapping({"getTimes"}) + @ResponseBody + public String getTimes(String files) { + List list = this.logFileDao.findTimeList(files); + return JSONObject.toJSONString(list); + } + + @RequestMapping({"getClassName"}) + @ResponseBody + public String getClassName(String files, String startAndEndTime) { + List list = this.logFileDao.findClassNames(files, startAndEndTime); + return JSONObject.toJSONString(list); + } + + @RequestMapping({"getDetail"}) + @ResponseBody + public String getDetail(String methodName, String className, Long value, Integer type, String days, String startAndEndTime) throws ParseException { + AgentLogDO agentLogDo = new AgentLogDO(); + agentLogDo.setMethodName(methodName); + agentLogDo.setClassName(className); + agentLogDo.setDay(days); + agentLogDo.setStartAndEnd(startAndEndTime); + if (type.intValue() == 1) { + agentLogDo.setTime(value); + } else if (type.intValue() == 2) { + agentLogDo.setCounter(value); + } else if (type.intValue() == 3) { + agentLogDo.setAvg(value); + } + Example logFileExample = Example.of(agentLogDo); + Optional findOne = this.logFileDao.findOne(logFileExample); + return JSONObject.toJSONString(findOne.get()); + } + + @RequestMapping({"getEchartResult"}) + @ResponseBody + public String getEchartResult(String files) { + Map result = new HashMap<>(); + List timePointList = new ArrayList<>(); + List y1Data = new ArrayList<>(); + List y2Data = new ArrayList<>(); + List y3Data = new ArrayList<>(); + List results = this.logFileDao.stasticByFile(files); + for (Map statics : results) { + String timePoint = statics.get("timeCut").toString().substring(10); + Long count = (Long)statics.get("totalCounter"); + y1Data.add(count.toString()); + Long time = (Long)statics.get("totalTime"); + y2Data.add(time.toString()); + if (count.longValue() != 0L) { + Long avg = Long.valueOf(time.longValue() / count.longValue()); + y3Data.add(avg.toString()); + } else { + y3Data.add("-"); + } + timePointList.add(timePoint); + } + result.put("xData", JSONObject.toJSONString(timePointList)); + result.put("y1Data", JSONObject.toJSONString(y1Data)); + result.put("y2Data", JSONObject.toJSONString(y2Data)); + result.put("y3Data", JSONObject.toJSONString(y3Data)); + return JSONObject.toJSONString(result); + } + + @RequestMapping({"getDetailTableResult"}) + @ResponseBody + public String getDetailTableResult(Integer page, String type, String order, String className, String methodName) throws ParseException { + Map result = new HashMap<>(); + AgentLogDO agentLogDo = new AgentLogDO(); + if (StringUtils.isNotEmpty(methodName)) + agentLogDo.setMethodName(methodName); + if (StringUtils.isNotEmpty(className)) + agentLogDo.setClassName(className); + Example logFileExample = Example.of(agentLogDo); + String sortString = "time"; + Pageable pageable = this.logFileService.getPageInfo(page, type, order, result, sortString); + Page pageInfo = this.logFileDao.findAll(logFileExample, pageable); + result.put("code", Integer.valueOf(1)); + result.put("count", Long.valueOf(pageInfo.getTotalElements())); + result.put("data", JSON.toJSON(pageInfo.getContent())); + return JSONObject.toJSONString(result); + } + + @RequestMapping({"getTableResult"}) + @ResponseBody + public String getTableResult(String files, String startAndEndTime, Integer page, String type, String order, String className, String methodName) throws ParseException { + Map result = new HashMap<>(); + AgentLogDO agentLogDo = new AgentLogDO(); + agentLogDo.setFileName(files); + if (!startAndEndTime.equals("null")) + agentLogDo.setStartAndEnd(startAndEndTime); + if (StringUtils.isNotEmpty(methodName)) + agentLogDo.setMethodName(methodName); + if (StringUtils.isNotEmpty(className)) + agentLogDo.setClassName(className); + ExampleMatcher matcher = ExampleMatcher.matching().withMatcher("className", ExampleMatcher.GenericPropertyMatchers.contains()); + Example logFileExample = Example.of(agentLogDo, matcher); + String sortString = "avg"; + Pageable pageable = this.logFileService.getPageInfo(page, type, order, result, sortString); + Page pageInfo = this.logFileDao.findAll(logFileExample, pageable); + result.put("code", Integer.valueOf(1)); + result.put("count", Long.valueOf(pageInfo.getTotalElements())); + result.put("data", JSON.toJSON(pageInfo.getContent())); + return JSONObject.toJSONString(result); + } +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/IndexController.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/IndexController.java new file mode 100644 index 0000000..b260f58 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/controller/IndexController.java @@ -0,0 +1,16 @@ +package com.wenshuo.agent.analyzer.controller; + +import org.springframework.stereotype.Controller; +import org.springframework.web.bind.annotation.RequestMapping; + +/** + * @date 2024/09/06 15:00 + **/ +@Controller +public class IndexController { + + // @RequestMapping({"/"}) + public String index() { + return "jsp/prc"; + } +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/dao/LogFileDao.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/dao/LogFileDao.java new file mode 100644 index 0000000..467fd99 --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/dao/LogFileDao.java @@ -0,0 +1,41 @@ +package com.wenshuo.agent.analyzer.dao; + +import java.util.Date; +import java.util.List; +import java.util.Map; +import java.util.UUID; + +import com.wenshuo.agent.analyzer.bean.AgentLogDO; +import org.springframework.data.jpa.repository.JpaRepository; +import org.springframework.data.jpa.repository.Modifying; +import org.springframework.data.jpa.repository.Query; + +public interface LogFileDao extends JpaRepository { + @Query("select t from AgentLogDO t where t.className = ?1 and t.methodName = ?2 and t.startTime = ?3 and t.endTime =?4") + List findByClassName(String paramString1, String paramString2, Date paramDate1, Date paramDate2); + + @Query("select startAndEnd from AgentLogDO t where t.fileName = ?1 group by startAndEnd order by startAndEnd") + List findTimeList(String paramString); + + @Query("select timeCut from AgentLogDO t where t.fileName = ?1 group by timeCut order by timeCut") + List findTimeCutList(String paramString); + + @Query("SELECT fileName FROM AgentLogDO group by fileName") + List findFileList(); + + @Modifying + @Query("delete from AgentLogDO t where t.fileName = ?1") + void deleteFiles(String paramString); + + @Query("select className from AgentLogDO t where t.fileName = ?1 and t.startAndEnd = ?2 ") + List findClassNames(String paramString1, String paramString2); + + @Query("select sum(counter) from AgentLogDO t where t.fileName = ?1 and t.timeCut = ?2 ") + Long selectCountInfo(String paramString1, String paramString2); + + @Query("select sum(time) from AgentLogDO t where t.fileName = ?1 and t.timeCut = ?2 ") + Long selectTimeInfo(String paramString1, String paramString2); + + @Query("select t.timeCut as timeCut,sum(time) as totalTime,sum(counter) as totalCounter from AgentLogDO t where t.fileName = ?1 group by timeCut order by timeCut ") + List stasticByFile(String paramString); +} diff --git a/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/service/LogFileService.java b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/service/LogFileService.java new file mode 100644 index 0000000..03a0c2d --- /dev/null +++ b/agent-analyer/src/main/java/com/wenshuo/agent/analyzer/service/LogFileService.java @@ -0,0 +1,150 @@ +package com.wenshuo.agent.analyzer.service; + +import com.alibaba.fastjson.JSONObject; +import com.wenshuo.agent.analyzer.bean.AgentLogDO; +import com.wenshuo.agent.analyzer.bean.ClassBean; +import com.wenshuo.agent.analyzer.bean.MethodBean; +import com.wenshuo.agent.analyzer.dao.LogFileDao; +import org.apache.commons.io.IOUtils; +import org.apache.commons.lang3.StringUtils; +import org.apache.commons.lang3.time.DateUtils; +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.data.domain.Example; +import org.springframework.data.domain.PageRequest; +import org.springframework.data.domain.Pageable; +import org.springframework.data.domain.Sort; +import org.springframework.stereotype.Service; +import org.springframework.util.CollectionUtils; +import org.springframework.web.multipart.MultipartFile; + +import java.io.IOException; +import java.io.InputStream; +import java.text.ParseException; +import java.util.ArrayList; +import java.util.List; +import java.util.Map; + +/** + * @date 2024/09/06 14:25 + **/ +@Service +public class LogFileService { + private static Log log = LogFactory.getLog(LogFileService.class); + + private static final String PATTERNS = "yyyy-MM-dd hh:mm:ss"; + + @Autowired + private LogFileDao logFileDao; + + public boolean saveFileInfoToDatabase(MultipartFile file, JSONObject json) throws IOException, ParseException { + long start = System.currentTimeMillis(); + boolean success = validateAgentLogFile(file, json); + if (!success) + return false; + String fileName = file.getOriginalFilename(); + String agentLogStr = readAgentLog(file); + List agentLogArray = JSONObject.parseArray(agentLogStr, ClassBean.class); + long parseArrayEnd = System.currentTimeMillis(); + log.info("转换【" + fileName + "】成ClassBean成功，耗时【" + (parseArrayEnd - start) + "】毫秒，共有【" + agentLogArray.size() + "】条"); + List agentLogDOList = new ArrayList<>(agentLogArray.size() * 10); + for (ClassBean classBean : agentLogArray) { + List methodList = JSONObject.parseArray(classBean.getMethods(), MethodBean.class); + if (!CollectionUtils.isEmpty(methodList)) + for (MethodBean methodBean : methodList) { + AgentLogDO agentLogDo = buildAgentLogDO(fileName, classBean, methodBean); + agentLogDOList.add(agentLogDo); + } + } + long convertToBeanEnd = System.currentTimeMillis(); + log.info("转换【" + fileName + "】成功，耗时【" + (convertToBeanEnd - start) + "】毫秒"); + if (!CollectionUtils.isEmpty(agentLogDOList)) { + this.logFileDao.saveAll(agentLogDOList); + this.logFileDao.flush(); + } + long end = System.currentTimeMillis(); + log.info("文件【" + fileName + "】对应的数据保存到数据库成功，耗时【" + (end - convertToBeanEnd) + "】毫秒"); + return true; + } + + private AgentLogDO buildAgentLogDO(String fileName, ClassBean classBean, MethodBean methodBean) throws ParseException { + AgentLogDO agentLogDo = new AgentLogDO(); + agentLogDo.setMethodName(methodBean.getMethodName()); + agentLogDo.setCounter(methodBean.getCounter()); + agentLogDo.setTime(methodBean.getTime()); + if (methodBean.getAvg() != null) { + agentLogDo.setAvg(methodBean.getAvg()); + } else { + agentLogDo.setAvg(Long.valueOf(methodBean.getTime().longValue() / methodBean.getCounter().longValue())); + } + agentLogDo.setMin(methodBean.getMin()); + agentLogDo.setMedian(methodBean.getMedian()); + agentLogDo.setMax(methodBean.getMax()); + agentLogDo.setTh90Pct(methodBean.getTh90Pct()); + agentLogDo.setTh95Pct(methodBean.getTh95Pct()); + agentLogDo.setTh99Pct(methodBean.getTh99Pct()); + agentLogDo.setClassName(classBean.getClassName()); + agentLogDo.setDay(classBean.getStart().substring(0, 10)); + agentLogDo.setStartAndEnd(classBean.getStart() + " 至 " + classBean.getEnd()); + agentLogDo.setStartTime(DateUtils.parseDate(classBean.getStart(), new String[] { "yyyy-MM-dd hh:mm:ss" })); + agentLogDo.setTimeCut(classBean.getStart().substring(0, 13)); + agentLogDo.setEndTime(DateUtils.parseDate(classBean.getEnd(), new String[] { "yyyy-MM-dd hh:mm:ss" })); + agentLogDo.setFileName(fileName); + return agentLogDo; + } + + private String readAgentLog(MultipartFile file) throws IOException { + try (InputStream input = file.getInputStream()) { + return IOUtils.toString(input, "UTF-8"); + } + } + + private boolean validateAgentLogFile(MultipartFile file, JSONObject json) { + if (file.getSize() == 0L) { + json.put("code", Integer.valueOf(1)); + json.put("message", "上传的文档不存在"); + return false; + } + String fileName = file.getOriginalFilename(); + AgentLogDO agentLogDoForQuery = new AgentLogDO(); + agentLogDoForQuery.setFileName(fileName); + Example example = Example.of(agentLogDoForQuery); + if (this.logFileDao.exists(example)) { + String message = "此文档已存在，文档名为" + fileName; + log.info(message); + json.put("message", message); + return false; + } + return true; + } + + public List getDataInfo(String methodName, String className) { + AgentLogDO agentLogDo = new AgentLogDO(); + agentLogDo.setClassName(className); + if (StringUtils.isNotEmpty(methodName)) + agentLogDo.setMethodName(methodName); + Example logFileExample = Example.of(agentLogDo); + String sortString = "time"; + Sort sort = Sort.by(Sort.Direction.DESC, new String[] { sortString }); + return this.logFileDao.findAll(logFileExample, sort); + } + + public Pageable getPageInfo(Integer page, String type, String order, Map result, String sortString) { + PageRequest pageRequest; + if (type != null) + sortString = type; + Sort sort = Sort.by(Sort.Direction.DESC, new String[] { sortString }); + if (order != null && order.contains("asc")) + sort = Sort.by(Sort.Direction.ASC, new String[] { sortString }); + Pageable pageable = null; + if (page != null && page.intValue() > 1) { + pageRequest = PageRequest.of(page.intValue() - 1, 100, sort); + result.put("pages", page); + } else { + pageRequest = PageRequest.of(0, 100, sort); + result.put("pages", Integer.valueOf(1)); + } + return (Pageable)pageRequest; + } +} diff --git a/agent-analyer/src/main/resources/application.yml b/agent-analyer/src/main/resources/application.yml new file mode 100644 index 0000000..42df27d --- /dev/null +++ b/agent-analyer/src/main/resources/application.yml @@ -0,0 +1,40 @@ +server: + port: 8080 +spring: + datasource: + url: jdbc:h2:mem:~/h2test;DB_CLOSE_DELAY=-1 + platform: h2 + username: sa + password: + driverClassName: org.h2.Driver + jpa: + database-platform: org.hibernate.dialect.H2Dialect + hibernate: + ddl-auto: update + properties: + hibernate: + show_sql: false + use_sql_comments: false + format_sql: false + generate_statistics : false + cache : + use_second_level_cache : false + jdbc: + batch_size : 50 + order_inserts : true + order_updates : true + h2: + console: + enabled: true + path: /console + settings: + trace: false + web-allow-others: true + servlet: + multipart: + max-file-size: 1000MB + max-request-size: 1000MB +logging: + level: + root: info + com.wenshuo: debug diff --git a/agent-analyer/src/main/resources/static/html/result.html b/agent-analyer/src/main/resources/static/html/result.html new file mode 100644 index 0000000..de816a2 --- /dev/null +++ b/agent-analyer/src/main/resources/static/html/result.html @@ -0,0 +1,100 @@ + + + + + +Insert title here + + +
+
+
+
+ + + + + + + + + \ No newline at end of file diff --git a/agent-analyer/src/main/resources/static/index.html b/agent-analyer/src/main/resources/static/index.html new file mode 100644 index 0000000..1fa50c3 --- /dev/null +++ b/agent-analyer/src/main/resources/static/index.html @@ -0,0 +1,634 @@ + + + + + agent日志自动化工具 + + + + +
+
+ + + +
+ + +
+ +
+
+ + +
+
+
+ +
+ +
+ +
+ + + + + + + + + + +
文件名大小状态操作
+
+ + +
+ + +
+ + + +
+
+
+ +
+ + +
+ + +
+ + +
+ +
+ +
+ +
+ + +
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+ +
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+ +
+ + +
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+
+ + + + + + + + + + + \ No newline at end of file diff --git a/agent-analyer/src/main/resources/static/js/ZeroClipboard.js b/agent-analyer/src/main/resources/static/js/ZeroClipboard.js new file mode 100644 index 0000000..8799966 --- /dev/null +++ b/agent-analyer/src/main/resources/static/js/ZeroClipboard.js @@ -0,0 +1,458 @@ +/*! +* ZeroClipboard +* The ZeroClipboard library provides an easy way to copy text to the clipboard using an invisible Adobe Flash movie and a JavaScript interface. +* Copyright (c) 2013 Jon Rohan, James M. Greene +* Licensed MIT +* http://zeroclipboard.org/ +* v1.2.0-beta.4 +*/ +(function() { + "use strict"; + var _camelizeCssPropName = function() { + var matcherRegex = /\-([a-z])/g, replacerFn = function(match, group) { + return group.toUpperCase(); + }; + return function(prop) { + return prop.replace(matcherRegex, replacerFn); + }; + }(); + var _getStyle = function(el, prop) { + var value, camelProp, tagName, possiblePointers, i, len; + if (window.getComputedStyle) { + value = window.getComputedStyle(el, null).getPropertyValue(prop); + } else { + camelProp = _camelizeCssPropName(prop); + if (el.currentStyle) { + value = el.currentStyle[camelProp]; + } else { + value = el.style[camelProp]; + } + } + if (prop === "cursor") { + if (!value || value === "auto") { + tagName = el.tagName.toLowerCase(); + possiblePointers = [ "a" ]; + for (i = 0, len = possiblePointers.length; i < len; i++) { + if (tagName === possiblePointers[i]) { + return "pointer"; + } + } + } + } + return value; + }; + var _elementMouseOver = function(event) { + if (!ZeroClipboard.prototype._singleton) return; + if (!event) { + event = window.event; + } + var target; + if (this !== window) { + target = this; + } else if (event.target) { + target = event.target; + } else if (event.srcElement) { + target = event.srcElement; + } + ZeroClipboard.prototype._singleton.setCurrent(target); + }; + var _addEventHandler = function(element, method, func) { + if (element.addEventListener) { + element.addEventListener(method, func, false); + } else if (element.attachEvent) { + element.attachEvent("on" + method, func); + } + }; + var _removeEventHandler = function(element, method, func) { + if (element.removeEventListener) { + element.removeEventListener(method, func, false); + } else if (element.detachEvent) { + element.detachEvent("on" + method, func); + } + }; + var _addClass = function(element, value) { + if (element.addClass) { + element.addClass(value); + return element; + } + if (value && typeof value === "string") { + var classNames = (value || "").split(/\s+/); + if (element.nodeType === 1) { + if (!element.className) { + element.className = value; + } else { + var className = " " + element.className + " ", setClass = element.className; + for (var c = 0, cl = classNames.length; c < cl; c++) { + if (className.indexOf(" " + classNames[c] + " ") < 0) { + setClass += " " + classNames[c]; + } + } + element.className = setClass.replace(/^\s+|\s+$/g, ""); + } + } + } + return element; + }; + var _removeClass = function(element, value) { + if (element.removeClass) { + element.removeClass(value); + return element; + } + if (value && typeof value === "string" || value === undefined) { + var classNames = (value || "").split(/\s+/); + if (element.nodeType === 1 && element.className) { + if (value) { + var className = (" " + element.className + " ").replace(/[\n\t]/g, " "); + for (var c = 0, cl = classNames.length; c < cl; c++) { + className = className.replace(" " + classNames[c] + " ", " "); + } + element.className = className.replace(/^\s+|\s+$/g, ""); + } else { + element.className = ""; + } + } + } + return element; + }; + var _getZoomFactor = function() { + var rect, physicalWidth, logicalWidth, zoomFactor = 1; + if (typeof document.body.getBoundingClientRect === "function") { + rect = document.body.getBoundingClientRect(); + physicalWidth = rect.right - rect.left; + logicalWidth = document.body.offsetWidth; + zoomFactor = Math.round(physicalWidth / logicalWidth * 100) / 100; + } + return zoomFactor; + }; + var _getDOMObjectPosition = function(obj) { + var info = { + left: 0, + top: 0, + width: 0, + height: 0, + zIndex: 999999999 + }; + var zi = _getStyle(obj, "z-index"); + if (zi && zi !== "auto") { + info.zIndex = parseInt(zi, 10); + } + if (obj.getBoundingClientRect) { + var rect = obj.getBoundingClientRect(); + var pageXOffset, pageYOffset, zoomFactor; + if ("pageXOffset" in window && "pageYOffset" in window) { + pageXOffset = window.pageXOffset; + pageYOffset = window.pageYOffset; + } else { + zoomFactor = _getZoomFactor(); + pageXOffset = Math.round(document.documentElement.scrollLeft / zoomFactor); + pageYOffset = Math.round(document.documentElement.scrollTop / zoomFactor); + } + var leftBorderWidth = document.documentElement.clientLeft || 0; + var topBorderWidth = document.documentElement.clientTop || 0; + info.left = rect.left + pageXOffset - leftBorderWidth; + info.top = rect.top + pageYOffset - topBorderWidth; + info.width = "width" in rect ? rect.width : rect.right - rect.left; + info.height = "height" in rect ? rect.height : rect.bottom - rect.top; + } + return info; + }; + var _noCache = function(path, options) { + var useNoCache = !(options && options.useNoCache === false); + if (useNoCache) { + return (path.indexOf("?") === -1 ? "?" : "&") + "nocache=" + new Date().getTime(); + } else { + return ""; + } + }; + var _vars = function(options) { + var str = []; + var origins = []; + if (options.trustedOrigins) { + if (typeof options.trustedOrigins === "string") { + origins = origins.push(options.trustedOrigins); + } else if (typeof options.trustedOrigins === "object" && "length" in options.trustedOrigins) { + origins = origins.concat(options.trustedOrigins); + } + } + if (options.trustedDomains) { + if (typeof options.trustedDomains === "string") { + origins = origins.push(options.trustedDomains); + } else if (typeof options.trustedDomains === "object" && "length" in options.trustedDomains) { + origins = origins.concat(options.trustedDomains); + } + } + if (origins.length) { + str.push("trustedOrigins=" + encodeURIComponent(origins.join(","))); + } + if (typeof options.amdModuleId === "string" && options.amdModuleId) { + str.push("amdModuleId=" + encodeURIComponent(options.amdModuleId)); + } + if (typeof options.cjsModuleId === "string" && options.cjsModuleId) { + str.push("cjsModuleId=" + encodeURIComponent(options.cjsModuleId)); + } + return str.join("&"); + }; + var _inArray = function(elem, array) { + if (array.indexOf) { + return array.indexOf(elem); + } + for (var i = 0, length = array.length; i < length; i++) { + if (array[i] === elem) { + return i; + } + } + return -1; + }; + var _prepGlue = function(elements) { + if (typeof elements === "string") throw new TypeError("ZeroClipboard doesn't accept query strings."); + if (!elements.length) return [ elements ]; + return elements; + }; + var _dispatchCallback = function(func, element, instance, args, async) { + if (async) { + window.setTimeout(function() { + func.call(element, instance, args); + }, 0); + } else { + func.call(element, instance, args); + } + }; + var ZeroClipboard = function(elements, options) { + if (elements) (ZeroClipboard.prototype._singleton || this).glue(elements); + if (ZeroClipboard.prototype._singleton) return ZeroClipboard.prototype._singleton; + ZeroClipboard.prototype._singleton = this; + this.options = {}; + for (var kd in _defaults) this.options[kd] = _defaults[kd]; + for (var ko in options) this.options[ko] = options[ko]; + this.handlers = {}; + if (ZeroClipboard.detectFlashSupport()) _bridge(); + }; + var currentElement, gluedElements = []; + ZeroClipboard.prototype.setCurrent = function(element) { + currentElement = element; + this.reposition(); + var titleAttr = element.getAttribute("title"); + if (titleAttr) { + this.setTitle(titleAttr); + } + var useHandCursor = this.options.forceHandCursor === true || _getStyle(element, "cursor") === "pointer"; + _setHandCursor.call(this, useHandCursor); + }; + ZeroClipboard.prototype.setText = function(newText) { + if (newText && newText !== "") { + this.options.text = newText; + if (this.ready()) this.flashBridge.setText(newText); + } + }; + ZeroClipboard.prototype.setTitle = function(newTitle) { + if (newTitle && newTitle !== "") this.htmlBridge.setAttribute("title", newTitle); + }; + ZeroClipboard.prototype.setSize = function(width, height) { + if (this.ready()) this.flashBridge.setSize(width, height); + }; + ZeroClipboard.prototype.setHandCursor = function(enabled) { + enabled = typeof enabled === "boolean" ? enabled : !!enabled; + _setHandCursor.call(this, enabled); + this.options.forceHandCursor = enabled; + }; + var _setHandCursor = function(enabled) { + if (this.ready()) this.flashBridge.setHandCursor(enabled); + }; + ZeroClipboard.version = "1.2.0-beta.4"; + var _defaults = { + moviePath: "ZeroClipboard.swf", + trustedOrigins: null, + text: null, + hoverClass: "zeroclipboard-is-hover", + activeClass: "zeroclipboard-is-active", + allowScriptAccess: "sameDomain", + useNoCache: true, + forceHandCursor: false + }; + ZeroClipboard.setDefaults = function(options) { + for (var ko in options) _defaults[ko] = options[ko]; + }; + ZeroClipboard.destroy = function() { + ZeroClipboard.prototype._singleton.unglue(gluedElements); + var bridge = ZeroClipboard.prototype._singleton.htmlBridge; + bridge.parentNode.removeChild(bridge); + delete ZeroClipboard.prototype._singleton; + }; + ZeroClipboard.detectFlashSupport = function() { + var hasFlash = false; + if (typeof ActiveXObject === "function") { + try { + if (new ActiveXObject("ShockwaveFlash.ShockwaveFlash")) { + hasFlash = true; + } + } catch (error) {} + } + if (!hasFlash && navigator.mimeTypes["application/x-shockwave-flash"]) { + hasFlash = true; + } + return hasFlash; + }; + var _amdModuleId = null; + var _cjsModuleId = null; + var _bridge = function() { + var client = ZeroClipboard.prototype._singleton; + var container = document.getElementById("global-zeroclipboard-html-bridge"); + if (!container) { + var opts = {}; + for (var ko in client.options) opts[ko] = client.options[ko]; + opts.amdModuleId = _amdModuleId; + opts.cjsModuleId = _cjsModuleId; + var flashvars = _vars(opts); + var html = ' '; + container = document.createElement("div"); + container.id = "global-zeroclipboard-html-bridge"; + container.setAttribute("class", "global-zeroclipboard-container"); + container.setAttribute("data-clipboard-ready", false); + container.style.position = "absolute"; + container.style.left = "-9999px"; + container.style.top = "-9999px"; + container.style.width = "15px"; + container.style.height = "15px"; + container.style.zIndex = "9999"; + container.innerHTML = html; + document.body.appendChild(container); + } + client.htmlBridge = container; + client.flashBridge = document["global-zeroclipboard-flash-bridge"] || container.children[0].lastElementChild; + }; + ZeroClipboard.prototype.resetBridge = function() { + this.htmlBridge.style.left = "-9999px"; + this.htmlBridge.style.top = "-9999px"; + this.htmlBridge.removeAttribute("title"); + this.htmlBridge.removeAttribute("data-clipboard-text"); + _removeClass(currentElement, this.options.activeClass); + currentElement = null; + this.options.text = null; + }; + ZeroClipboard.prototype.ready = function() { + var ready = this.htmlBridge.getAttribute("data-clipboard-ready"); + return ready === "true" || ready === true; + }; + ZeroClipboard.prototype.reposition = function() { + if (!currentElement) return false; + var pos = _getDOMObjectPosition(currentElement); + this.htmlBridge.style.top = pos.top + "px"; + this.htmlBridge.style.left = pos.left + "px"; + this.htmlBridge.style.width = pos.width + "px"; + this.htmlBridge.style.height = pos.height + "px"; + this.htmlBridge.style.zIndex = pos.zIndex + 1; + this.setSize(pos.width, pos.height); + }; + ZeroClipboard.dispatch = function(eventName, args) { + ZeroClipboard.prototype._singleton.receiveEvent(eventName, args); + }; + ZeroClipboard.prototype.on = function(eventName, func) { + var events = eventName.toString().split(/\s/g); + for (var i = 0; i < events.length; i++) { + eventName = events[i].toLowerCase().replace(/^on/, ""); + if (!this.handlers[eventName]) this.handlers[eventName] = func; + } + if (this.handlers.noflash && !ZeroClipboard.detectFlashSupport()) { + this.receiveEvent("onNoFlash", null); + } + }; + ZeroClipboard.prototype.addEventListener = ZeroClipboard.prototype.on; + ZeroClipboard.prototype.off = function(eventName, func) { + var events = eventName.toString().split(/\s/g); + for (var i = 0; i < events.length; i++) { + eventName = events[i].toLowerCase().replace(/^on/, ""); + for (var event in this.handlers) { + if (event === eventName && this.handlers[event] === func) { + delete this.handlers[event]; + } + } + } + }; + ZeroClipboard.prototype.removeEventListener = ZeroClipboard.prototype.off; + ZeroClipboard.prototype.receiveEvent = function(eventName, args) { + eventName = eventName.toString().toLowerCase().replace(/^on/, ""); + var element = currentElement; + var performCallbackAsync = true; + switch (eventName) { + case "load": + if (args && parseFloat(args.flashVersion.replace(",", ".").replace(/[^0-9\.]/gi, "")) < 10) { + this.receiveEvent("onWrongFlash", { + flashVersion: args.flashVersion + }); + return; + } + this.htmlBridge.setAttribute("data-clipboard-ready", true); + break; + + case "mouseover": + _addClass(element, this.options.hoverClass); + break; + + case "mouseout": + _removeClass(element, this.options.hoverClass); + this.resetBridge(); + break; + + case "mousedown": + _addClass(element, this.options.activeClass); + break; + + case "mouseup": + _removeClass(element, this.options.activeClass); + break; + + case "datarequested": + var targetId = element.getAttribute("data-clipboard-target"), targetEl = !targetId ? null : document.getElementById(targetId); + if (targetEl) { + var textContent = targetEl.value || targetEl.textContent || targetEl.innerText; + if (textContent) this.setText(textContent); + } else { + var defaultText = element.getAttribute("data-clipboard-text"); + if (defaultText) this.setText(defaultText); + } + performCallbackAsync = false; + break; + + case "complete": + this.options.text = null; + break; + } + if (this.handlers[eventName]) { + var func = this.handlers[eventName]; + if (typeof func === "string" && typeof window[func] === "function") { + func = window[func]; + } + if (typeof func === "function") { + _dispatchCallback(func, element, this, args, performCallbackAsync); + } + } + }; + ZeroClipboard.prototype.glue = function(elements) { + elements = _prepGlue(elements); + for (var i = 0; i < elements.length; i++) { + if (_inArray(elements[i], gluedElements) == -1) { + gluedElements.push(elements[i]); + _addEventHandler(elements[i], "mouseover", _elementMouseOver); + } + } + }; + ZeroClipboard.prototype.unglue = function(elements) { + elements = _prepGlue(elements); + for (var i = 0; i < elements.length; i++) { + _removeEventHandler(elements[i], "mouseover", _elementMouseOver); + var arrayIndex = _inArray(elements[i], gluedElements); + if (arrayIndex != -1) gluedElements.splice(arrayIndex, 1); + } + }; + if (typeof define === "function" && define.amd) { + define([ "require", "exports", "module" ], function(require, exports, module) { + _amdModuleId = module && module.id || null; + return ZeroClipboard; + }); + } else if (typeof module !== "undefined" && module) { + _cjsModuleId = module.id || null; + module.exports = ZeroClipboard; + } else { + window.ZeroClipboard = ZeroClipboard; + } +})(); \ No newline at end of file diff --git a/agent-analyer/src/main/resources/static/js/ZeroClipboard.min.js b/agent-analyer/src/main/resources/static/js/ZeroClipboard.min.js new file mode 100644 index 0000000..9e583aa --- /dev/null +++ b/agent-analyer/src/main/resources/static/js/ZeroClipboard.min.js @@ -0,0 +1,9 @@ +/*! +* ZeroClipboard +* The ZeroClipboard library provides an easy way to copy text to the clipboard using an invisible Adobe Flash movie and a JavaScript interface. +* Copyright (c) 2013 Jon Rohan, James M. Greene +* Licensed MIT +* http://zeroclipboard.org/ +* v1.2.0-beta.4 +*/ +!function(){"use strict";var a,b=function(){var a=/\-([a-z])/g,b=function(a,b){return b.toUpperCase()};return function(c){return c.replace(a,b)}}(),c=function(a,c){var d,e,f,g,h,i;if(window.getComputedStyle?d=window.getComputedStyle(a,null).getPropertyValue(c):(e=b(c),d=a.currentStyle?a.currentStyle[e]:a.style[e]),"cursor"===c&&(!d||"auto"===d))for(f=a.tagName.toLowerCase(),g=["a"],h=0,i=g.length;i>h;h++)if(f===g[h])return"pointer";return d},d=function(a){if(p.prototype._singleton){a||(a=window.event);var b;this!==window?b=this:a.target?b=a.target:a.srcElement&&(b=a.srcElement),p.prototype._singleton.setCurrent(b)}},e=function(a,b,c){a.addEventListener?a.addEventListener(b,c,!1):a.attachEvent&&a.attachEvent("on"+b,c)},f=function(a,b,c){a.removeEventListener?a.removeEventListener(b,c,!1):a.detachEvent&&a.detachEvent("on"+b,c)},g=function(a,b){if(a.addClass)return a.addClass(b),a;if(b&&"string"==typeof b){var 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ztKHequy%K29%~igz)x+#EU3rTB6nmi_DvRJlMH+}06(y4CXdWgU#WCLsdPdq6~2@n zNT?}?rhJ7i0iB`OfSRAp&&`eiv zab00GG)MZv?a&Y21h`6Z x7)zJKB11J?tUWB&wu-e!#oFUyO@iN7=v;g?38?1AqA4Bz+PnkEe*sSxkJixF*6{!U literal 0 HcmV?d00001 diff --git a/agent-analyer/src/main/resources/static/js/amsverify.js b/agent-analyer/src/main/resources/static/js/amsverify.js new file mode 100644 index 0000000..ebe9d44 --- /dev/null +++ b/agent-analyer/src/main/resources/static/js/amsverify.js @@ -0,0 +1,154 @@ +//验证是否为空或者多空格 + function isNull(str){ + if ( str == "" ) return true; + var regu = "^[ ]+$"; + var re = new RegExp(regu); + return re.test(str); + } + function isChinaOrLett(s){// 判断是否是汉字、字母 + var regu = "^[a-zA-Z\u4e00-\u9fa5]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + function isChina(s){// 判断是否是汉字 + var regu = "[\u4e00-\u9fa5]+"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + function isCardNo(card) // 是否合法的身份证号 + { + // 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X + var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/; + if(reg.test(card)) + { + return true; + }else{ + return false + } + } + //合法的IP地址 + function isIP(strIP) { + if (isNull(strIP)) return false; + var re=/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/g // 匹配IP地址的正则表达式 + if(re.test(strIP)) + { + if( RegExp.$1 <256 && RegExp.$2<256 && RegExp.$3<256 && RegExp.$4<256) return true; + } + return false; + } + /* + * 用途：检查输入字符串是否符合正整数格式 输入： s：字符串 返回： 如果通过验证返回true,否则返回false + * + */ + function isNumber( s ){ + var regu = "^[0-9]+$"; + var re = new RegExp(regu); + if (s.search(re) != -1) { + return true; + } else { + return false; + } + } + + /* + 用途：检查输入的起止日期是否正确，启用时间不得早于当前时间， + 且结束如期>=起始日期 + 输入： + startDate：起始日期 + endDate：结束如期 + 返回： + 如果通过验证返回true,否则返回false + + */ + function checkTwoDate( startDate,endDate ) { + var now = new Date();//获得系统当前时间 + //把时间格式转换为字符串 + var year = now.getFullYear(); + var month =(now.getMonth() + 1).toString(); + var day = (now.getDate()).toString(); + if (month.length == 1) { + month = "0" + month; + } + if (day.length == 1) { + day = "0" + day; + } + var dateTime = year+month+day; + //验证 + startDate=startDate.replace("-","").replace("-",""); + endDate=startDate.replace("-","").replace("-",""); + if(startDateendDate) { + return false; + } + return true; + } + /* + 结束如期>=起始日期 + 输入： + startDate：起始日期 + endDate：结束如期 + 返回： + 如果通过验证返回true,否则返回false + + */ + function checkDate( startDate,endDate ) { + startDate=startDate.replace("-","").replace("-",""); + endDate=endDate.replace("-","").replace("-",""); + if( startDate>endDate) { + return false; + } + return true; + } + /* + 用途：检查输入字符串是否只由汉字、字母、数字组成 + 输入： + value：字符串 + 返回： + 如果通过验证返回true,否则返回false + + */ + function isChinaOrNumbOrLett( s ){//判断是否是汉字、字母、数字组成 + var regu = "^[0-9a-zA-Z\u4e00-\u9fa5]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + /* + 用途：检查输入字符串是否只由、字母、数字组成 + 输入： + value：字符串 + 返回： + 如果通过验证返回true,否则返回false + + */ + function isNumbOrLett( s ){//判断是否是字母、数字组成 + var regu = "^[0-9a-zA-Z]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + /* + 用途：检查输入字符串是否是http://开头 + */ + function isServerUrl(s){ + var patrn=/^(https?|http:\/\/)/i; + var patrn2=/^[-\.\w#%&:?=\/]+$/i; + if (!patrn.exec(s)) return false; + if (!patrn2.exec(s)) return false ; + return true; + } diff --git a/agent-analyer/src/main/resources/static/js/auto-line-number.js b/agent-analyer/src/main/resources/static/js/auto-line-number.js new file mode 100644 index 0000000..f511e52 --- /dev/null +++ b/agent-analyer/src/main/resources/static/js/auto-line-number.js @@ -0,0 +1,100 @@ +;(function($){ + var AutoRowsNumbers = function (element, config){ + this.$element = $(element); + this.$group = $('
', { 'class': "textarea-group" }); + this.$ol = $('
', { 'class': 'textarea-rows' }); + this.$wrap = $('
', { 'class': 'textarea-wrap' }); + this.$group.css({ + "width" : this.$element.outerWidth(true) + 'px', + "display" : config.display + }); + this.$ol.css({ + "color" : config.color, + "width" : config.width, + "height" : this.$element.height(), + "font-size" : this.$element.css("font-size"), + "line-height" : this.$element.css("line-height"), + "position" : "absolute", + "overflow" : "hidden", + "margin" : 0, + "padding" : 0, + "text-align": "center", + "font-family": "仿宋" + }); + this.$wrap.css({ + "padding" : ((this.$element.outerHeight() - this.$element.height())/2) + 'px 0', + "background-color" : config.bgColor, + "position" : "absolute", + "width" : config.width, + "height" : this.$element.height() + 'px' + }); + this.$element.css({ + "white-space" : "pre", + "resize": "none", + "margin-left" : (parseInt(config.width) - parseInt(this.$element.css("border-left-width"))) + 'px', + "width": (this.$element.width() - parseInt(config.width)) + 'px' + }); + + } + + AutoRowsNumbers.prototype = { + constructor: AutoRowsNumbers, + + init : function(){ + var that = this; + that.$element.wrap(that.$group); + that.$ol.insertBefore(that.$element); + this.$ol.wrap(that.$wrap) + that.$element.on('keydown',{ that: that }, that.inputText); + that.$element.on('scroll',{ that: that },that.syncScroll); + that.inputText({data:{that:that}}); + }, + + inputText: function(event){ + var that = event.data.that; + + setTimeout(function(){ + var value = that.$element.val(); + value.match(/\n/g) ? that.updateLine(value.match(/\n/g).length+1) : that.updateLine(1); + that.syncScroll({data:{that:that}}); + },0); + }, + + updateLine: function(count){ + var that = this; + that.$element; + that.$ol.html(''); + + for(var i=1;i<=count;i++){ + that.$ol.append("
"+i+"
"); + } + }, + + syncScroll: function(event){ + var that = event.data.that; + that.$ol.children().eq(0).css("margin-top", -(that.$element.scrollTop()) + "px"); + } + } + + $.fn.setTextareaCount = function(option){ + var config = {}; + var option = arguments[0] ? arguments[0] : {}; + config.color = option.color ? option.color : "#FFF"; + config.width = option.width ? option.width : "30px"; + config.bgColor = option.bgColor ? option.bgColor : "#999"; + config.display = option.display ? option.display : "block"; + + return this.each(function () { + var $this = $(this), + data = $this.data('autoRowsNumbers'); + + if (!data){ $this.data('autoRowsNumbers', (data = new AutoRowsNumbers($this, config))); } + + if (typeof option === 'string'){ + return false; + } else { + data.init(); + } + }); + } +})(jQuery) diff --git a/agent-analyer/src/main/resources/static/js/diyfunction.js b/agent-analyer/src/main/resources/static/js/diyfunction.js new file mode 100644 index 0000000..628e4e6 --- /dev/null +++ b/agent-analyer/src/main/resources/static/js/diyfunction.js @@ -0,0 +1,1081 @@ +//验证是否为空或者多空格 + function isNull(str){ + if ( str == "" ) return true; + var regu = "^[ ]+$"; + var re = new RegExp(regu); + return re.test(str); + } + function isChinaOrLett(s){// 判断是否是汉字、字母 + var regu = "^[a-zA-Z\u4e00-\u9fa5]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + function isChina(s){// 判断是否是汉字 + var regu = "[\u4e00-\u9fa5]+"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + function isCardNo(card) // 是否合法的身份证号 + { + // 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X + var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/; + if(reg.test(card)) + { + return true; + }else{ + return false + } + } + //合法的IP地址 + function isIP(strIP) { + if (isNull(strIP)) return false; + var re=/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/g // 匹配IP地址的正则表达式 + if(re.test(strIP)) + { + if( RegExp.$1 <256 && RegExp.$2<256 && RegExp.$3<256 && RegExp.$4<256) return true; + } + return false; + } + /* + * 用途：检查输入字符串是否符合正整数格式 输入： s：字符串 返回： 如果通过验证返回true,否则返回false + * + */ + function isNumber( s ){ + var regu = "^[0-9]+$"; + var re = new RegExp(regu); + if (s.search(re) != -1) { + return true; + } else { + return false; + } + } + + /* + 用途：检查输入的起止日期是否正确，启用时间不得早于当前时间， + 且结束如期>=起始日期 + 输入： + startDate：起始日期 + endDate：结束如期 + 返回： + 如果通过验证返回true,否则返回false + + */ + function checkTwoDate( startDate,endDate ) { + var now = new Date();//获得系统当前时间 + //把时间格式转换为字符串 + var year = now.getFullYear(); + var month =(now.getMonth() + 1).toString(); + var day = (now.getDate()).toString(); + if (month.length == 1) { + month = "0" + month; + } + if (day.length == 1) { + day = "0" + day; + } + var dateTime = year+month+day; + //验证 + startDate=startDate.replace("-","").replace("-",""); + endDate=startDate.replace("-","").replace("-",""); + if(startDateendDate) { + return false; + } + return true; + } + /* + 结束如期>=起始日期 + 输入： + startDate：起始日期 + endDate：结束如期 + 返回： + 如果通过验证返回true,否则返回false + + */ + function checkDate( startDate,endDate ) { + startDate=startDate.replace("-","").replace("-",""); + endDate=endDate.replace("-","").replace("-",""); + if( startDate>endDate) { + return false; + } + return true; + } + /* + 用途：检查输入字符串是否只由汉字、字母、数字组成 + 输入： + value：字符串 + 返回： + 如果通过验证返回true,否则返回false + + */ + function isChinaOrNumbOrLett( s ){//判断是否是汉字、字母、数字组成 + var regu = "^[0-9a-zA-Z\u4e00-\u9fa5]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + /* + 用途：检查输入字符串是否只由、字母、数字组成 + 输入： + value：字符串 + 返回： + 如果通过验证返回true,否则返回false + + */ + function isNumbOrLett( s ){//判断是否是字母、数字组成 + var regu = "^[0-9a-zA-Z]+$"; + var re = new RegExp(regu); + if (re.test(s)) { + return true; + }else{ + return false; + } + } + /* + 用途：检查输入字符串是否是http://开头 + */ + function isServerUrl(s){ + var patrn=/^(https?|http:\/\/)/i; + var patrn2=/^[-\.\w#%&:?=\/]+$/i; + if (!patrn.exec(s)) return false; + if (!patrn2.exec(s)) return false ; + return true; + } + + +/** + * 浏览器复制功能 + */ +function copy(){ + + $('#copy_bar').zclip({ + path: 'ZeroClipboard.swf', + copy: function(){//复制内容 + return $('#code_area').val(); + }, + afterCopy: function(){//复制成功 + $.messager.show({ + title:'复制结果', + msg:'已复制到剪切板。', + timeout:3000, + showType:'slide', + style:{ + left:'', + top:'', + bottom:document.body.scrollTop+document.documentElement.scrollTop + } + + }); + } + }); + +} +/** + * 数据库信息读取cookie，实现记住功能 + */ +function readCookie(){ + $("#dbType").val(getCookie("dbType")); + $("#dbServerIp").val(getCookie("dbServerIp")); + $("#dbServerPort").val(getCookie("dbServerPort")); + $("#dbUserName").val(getCookie("dbUserName")); + $("#dbPassword").val(getCookie("dbPassword")); + $("#dbName").val(getCookie("dbName")); +} + +/** + * 把数据库信息存进cookie，实现记住密码功能 + */ +function setCookie(name,value,expireHours) { +// var cookieString=name+"="+escape(value); + var cookieString=name+"="+value; + //判断是否设置过期时间 + if(expireHours>0){ + var date=new Date(); + date.setTime(date.getTime+expireHours*3600*1000); + cookieString=cookieString+";expires="+date.toGMTString(); + } + document.cookie=cookieString; +} +function setCookies(dbTypeValue,dbServerIpValue,dbServerPortValue,dbUserNameValue,dbPasswordValue,dbNameValue){ + setCookie("dbType",dbTypeValue,12); + setCookie("dbServerIp",dbServerIpValue,12); + setCookie("dbServerPort",dbServerPortValue,12); + setCookie("dbUserName",dbUserNameValue,12); + setCookie("dbPassword",dbPasswordValue,12); + setCookie("dbName",dbNameValue,12); +} + +function getCookie(name){ + var strCookie=document.cookie; + var arrCookie=strCookie.split("; "); + for(var i=0;i1){ + bl= true; + }else{ + layer.alert('通信端口，请输入整数并且在1-65535之间！', -1); + return false; + } + if(isNull(userName)){ + layer.alert('用户名不能为空！', -1); + return false; + } + /* if(isNull(pwd)){ + layer.alert('密码不能为空！', -1); + return false; + } */ + if(isNull(dbName)){ + layer.alert('数据库名不能为空！', -1); + return false; + } + //用户名 + if(isChina(userName)){ + layer.alert('用户名不能为汉字！', -1); + return false; + } + //密码 + if(isChina(pwd)){ + layer.alert('密码不能为汉字！', -1); + return false; + } + //数据库名 + if(isChina(dbName)){ + layer.alert('数据库名不能为汉字！', -1); + return false; + } + return bl; +} +//左移数据 +function moveToLeft() +{ + var rows = $('#checkedTableList').datagrid('getChecked');// 获取所有选中的行 + if(rows.length==0) + { + $.messager.alert('错误',"请至少选择一行数据!",'error'); + return false; + } + for (var i = 0; i < rows.length; i++) + { + //获取自定义table 的中的checkbox值 + var tableName=rows[i].tableName; + $('#tableInfoList').datagrid('insertRow',{ + index: 0, // 索引从0开始 + row: { + tableName: tableName + } + }); + var rowIndex =$("#checkedTableList").datagrid("getRowIndex",rows[i]);//得到索引 + $("#checkedTableList").datagrid("deleteRow",rowIndex); + + + } +} +//点击右移按钮，发生数据变化 +function moveToRight() +{ + var rows = $('#tableInfoList').datagrid('getChecked');// 获取所有选中的行 + if(rows.length==0) + { + $.messager.alert('错误',"请至少选择一行数据!",'error'); + return false; + } + + for (var i = 0; i < rows.length; i++) + { + //获取自定义table 的中的checkbox值 + var tableName=rows[i].tableName; + $('#checkedTableList').datagrid('insertRow',{ + // index: 0, // 索引从0开始 从0开始，就是放在前面，如果不设置，就在后面追加 + row: { + tableName: tableName + } + }); + var rowIndex =$("#tableInfoList").datagrid("getRowIndex",rows[i]);//得到索引 + $("#tableInfoList").datagrid("deleteRow",rowIndex); + + + } + +} +function findObjectInArray(array,nodeText,parentNodeText){ + for ( var i = 0; i < array.length; i++) { + //alert(array[i].columnName+";"+array[i].tableName); + if (nodeText == array[i].columnName && parentNodeText == array[i].tableName) { + return array[i]; + } + } + return false; +} + + + +//重置日期控件格式 +function myformatter(date){ + var y = date.getFullYear(); + var m = date.getMonth()+1; + var d = date.getDate(); + return y+'-'+(m<10?('0'+m):m)+'-'+(d<10?('0'+d):d); +} +function myparser(s){ + if (!s) return new Date(); + var ss = (s.split('-')); + var y = parseInt(ss[0],10); + var m = parseInt(ss[1],10); + var d = parseInt(ss[2],10); + if (!isNaN(y) && !isNaN(m) && !isNaN(d)){ + return new Date(y,m-1,d); + } else { + return new Date(); + } +} + + +function preview(){ + +//$("#preview").click(function(){ + + var userDataType_2=$("#userDataType").combobox('getText')//预置类型 + var startNo_2=$("#startNo").val();//数值开始 + var endNo_2=$("#endNo").val();//数值结束 + var startLength_2=$("#startLength").val();//长度开始 + var endLength_2=$("#endLength").val();//长度结束 + var startDate_2=$('#startDate').datebox('getValue');//开始日期 + var endDate_2=$('#endDate').datebox('getValue');//结束日期 + var diy_2= $.trim($("#diy").val());//自定义字符 + var sql_2= $.trim($("#sql").val());//SQL语句 + var isContain_=$("#isContain_").is(":checked");//判断是否勾选了包含- + var isConnect=$("#isConnect").is(":checked");//判断是否勾选了包含- + + //不管删不删除以前的，都要添加当前页面数据。 + if (userDataType_2 == "数字") { + if(isNull(startNo_2) || isNull(endNo_2)){ + layer.alert('不能为空！', -1); + return false; + }else { + if(!isNumber(startNo_2) || (!isNumber(endNo_2))){ + layer.alert('长度必须为数字！', -1); + return false; + } + } + if ($("#paramsType").combobox('getText')=='随机小数' && !isNumber($.trim($("#numdigits").val()))) { + layer.alert('保留小数位数必须为小于7的数字！', -1); + return false; + } + }else if(userDataType_2=="自定义字符" ) { + if(isNull(diy_2)){ + layer.alert('不能为空！', -1); + return false; + } + }else if(userDataType_2=="SQL语句"){ + if(isNull(sql_2)){ + layer.alert('不能为空！', -1); + return false; + } + }else if(userDataType_2=="日期"){ + if(isNull(startDate_2) || isNull(endDate_2)){ + layer.alert('不能为空！', -1); + return false; + } + }else { + if(isNull(startLength_2) || isNull(endLength_2)){ + layer.alert('不能为空！', -1); + return false; + }else { + if(!isNumber(startLength_2) || (!isNumber(endLength_2))){ + layer.alert('长度必须为数字！', -1); + return false; + } + } + + } + if (!isNull($("#isFormatMessage").html())) { + layer.alert('参数格式不符合规则', -1); + return false; + } +/* $.messager.progress({ + title:"提示框", + text:"正在计算，请稍候..." + }); */ + + $.ajax({ + type : 'post', + url : _path+"/ColumnControl/preView",//测试连接的方法 + datatpye : "script/html", + data : $("#columnInfo").serialize(),//serialize() 方法通过序列化表单值，创建 URL 编码文本字符串。例如：username=admin&password=admin123 + success : function(msgdata) { + $.messager.progress('close'); + //if() + //$.messager.alert('预览结果',msgdata,'info'); + if( JSON.stringify(msgdata).indexOf('Exception:') !=-1){ + $.messager.alert('预览结果',msgdata,'error'); + }else{ + $.messager.alert('测试结果',msgdata,'info'); + } + } + }); +//}) +} + +/** + *点击导入配置 + */ +function openUpload(){ + if(!$("#conn").linkbutton('options').disabled)//获取该按钮的启用、禁用状态 + { + $.messager.alert('提示信息','请先连接数据库并正确选择待操作的数据表！','error'); + return false; + } + $('#upload_win').window('open'); + +} +//在选择表时，提供搜索功能 +function searchTable(){ + var bl= false; + var regu = /^\..*$/;//正整数的正则表达式 + //通信端口 + if(!regu.test($("#searchTableName").attr("value")) ){ + bl= true; + }else{ + layer.alert('输入格式错误', -1); + return false; + } + $('#tableInfoList').datagrid({ + title:'', + method:$("#db_form").attr("method"), + url:_path+"/dbControl/searchTableName", + queryParams:{ + searchTableName:$("#searchTableName").attr("value") + }, + striped : true,//设置为true将交替显示行背景。 + + loadMsg : '数据装载中......', + rownumbers: true, + singleSelect: false, + selectOnCheck: true, + checkOnSelect: true, + columns:[[ + {field:'checkbox',checkbox:true },//显示复选框样式，单独列出来一列，json返回内容不需包括 + {field:'tableName',title:'Table' } + ]], + //onLoadSuccess:function()，判断返回值，但返回值必须是json格式。并且是{'rows':[{'tableName':'连接不成功'}]}这种格式 + /* onLoadSuccess:function(data){ //JSON.stringify(data) 方法把data转为字符串，str.indexOf(str2)!=-1;判断是否包含某字符串 + $.messager.progress('close'); + if(JSON.stringify(data).indexOf("连接不成功") != -1){ + $.messager.alert('连接结果',"连接不成功",'error'); + }else { + $('#win').window('open'); + + } + } */ + }); +} +function paramFormatToDemo(src){ + var regu = "^%(0[0-9]{1,2})d$"; + var re = new RegExp(regu); + var 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null==t.rangeStart&&null==t.rangeEnd&&!t.scale},getCoordSysModel:R,setRange:function(t,e){this.option.rangeStart=t,this.option.rangeEnd=e},resetRange:function(){this.option.rangeStart=this.option.rangeEnd=null}},Q_=Ai({type:"triangle",shape:{cx:0,cy:0,width:0,height:0},buildPath:function(t,e){var n=e.cx,i=e.cy,r=e.width/2,o=e.height/2;t.moveTo(n,i-o),t.lineTo(n+r,i+o),t.lineTo(n-r,i+o),t.closePath()}}),J_=Ai({type:"diamond",shape:{cx:0,cy:0,width:0,height:0},buildPath:function(t,e){var n=e.cx,i=e.cy,r=e.width/2,o=e.height/2;t.moveTo(n,i-o),t.lineTo(n+r,i),t.lineTo(n,i+o),t.lineTo(n-r,i),t.closePath()}}),tw=Ai({type:"pin",shape:{x:0,y:0,width:0,height:0},buildPath:function(t,e){var n=e.x,i=e.y,r=e.width/5*3,o=Math.max(r,e.height),a=r/2,s=a*a/(o-a),l=i-o+a+s,u=Math.asin(s/a),h=Math.cos(u)*a,c=Math.sin(u),d=Math.cos(u),f=.6*a,p=.7*a;t.moveTo(n-h,l+s),t.arc(n,l,a,Math.PI-u,2*Math.PI+u),t.bezierCurveTo(n+h-c*f,l+s+d*f,n,i-p,n,i),t.bezierCurveTo(n,i-p,n-h+c*f,l+s+d*f,n-h,l+s),t.closePath()}}),ew=Ai({type:"arrow",shape:{x:0,y:0,width:0,height:0},buildPath:function(t,e){var n=e.height,i=e.width,r=e.x,o=e.y,a=i/3*2;t.moveTo(r,o),t.lineTo(r+a,o+n),t.lineTo(r,o+n/4*3),t.lineTo(r-a,o+n),t.lineTo(r,o),t.closePath()}}),nw={line:function(t,e,n,i,r){r.x1=t,r.y1=e+i/2,r.x2=t+n,r.y2=e+i/2},rect:function(t,e,n,i,r){r.x=t,r.y=e,r.width=n,r.height=i},roundRect:function(t,e,n,i,r){r.x=t,r.y=e,r.width=n,r.height=i,r.r=Math.min(n,i)/4},square:function(t,e,n,i,r){var 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i=e.symbolType,r=iw[i];"none"!==e.symbolType&&(r||(r=iw[i="rect"]),nw[i](e.x,e.y,e.width,e.height,r.shape),r.buildPath(t,r.shape,n))}}),ow={isDimensionStacked:Ps,enableDataStack:ks,getStackedDimension:Ls},aw=(Object.freeze||Object)({createList:function(t){return Os(t.getSource(),t)},getLayoutRect:Gr,dataStack:ow,createScale:function(t,e){var n=e;pr.isInstance(e)||h(n=new pr(e),K_);var i=rl(n);return i.setExtent(t[0],t[1]),il(i,n),i},mixinAxisModelCommonMethods:function(t){h(t,K_)},completeDimensions:Ts,createDimensions:C_,createSymbol:cl}),sw=1e-8;pl.prototype={constructor:pl,properties:null,getBoundingRect:function(){var t=this._rect;if(t)return t;for(var e=Number.MAX_VALUE,n=[e,e],i=[-e,-e],r=[],o=[],a=this.geometries,s=0;s0}),function(t){var e=t.properties,n=t.geometry,i=n.coordinates,r=[];"Polygon"===n.type&&r.push({type:"polygon",exterior:i[0],interiors:i.slice(1)}),"MultiPolygon"===n.type&&d(i,function(t){t[0]&&r.push({type:"polygon",exterior:t[0],interiors:t.slice(1)})});var o=new pl(e.name,r,e.cp);return o.properties=e,o})},uw=Dn(),hw=[0,1],cw=function(t,e,n){this.dim=t,this.scale=e,this._extent=n||[0,0],this.inverse=!1,this.onBand=!1};cw.prototype={constructor:cw,contain:function(t){var e=this._extent,n=Math.min(e[0],e[1]),i=Math.max(e[0],e[1]);return t>=n&&t<=i},containData:function(t){return this.contain(this.dataToCoord(t))},getExtent:function(){return this._extent.slice()},getPixelPrecision:function(t){return Ir(t||this.scale.getExtent(),this._extent)},setExtent:function(t,e){var n=this._extent;n[0]=t,n[1]=e},dataToCoord:function(t,e){var n=this._extent,i=this.scale;return t=i.normalize(t),this.onBand&&"ordinal"===i.type&&Ll(n=n.slice(),i.count()),xr(t,hw,n,e)},coordToData:function(t,e){var n=this._extent,i=this.scale;this.onBand&&"ordinal"===i.type&&Ll(n=n.slice(),i.count());var r=xr(t,n,hw,e);return this.scale.scale(r)},pointToData:function(t,e){},getTicksCoords:function(t){var e=(t=t||{}).tickModel||this.getTickModel(),n=yl(this,e),i=f(n.ticks,function(t){return{coord:this.dataToCoord(t),tickValue:t}},this),r=e.get("alignWithLabel");return Ol(this,i,n.tickCategoryInterval,r,t.clamp),i},getViewLabels:function(){return vl(this).labels},getLabelModel:function(){return this.model.getModel("axisLabel")},getTickModel:function(){return this.model.getModel("axisTick")},getBandWidth:function(){var t=this._extent,e=this.scale.getExtent(),n=e[1]-e[0]+(this.onBand?1:0);0===n&&(n=1);var i=Math.abs(t[1]-t[0]);return Math.abs(i)/n},isHorizontal:null,getRotate:null,calculateCategoryInterval:function(){return Tl(this)}};var dw=lw,fw={};d(["map","each","filter","indexOf","inherits","reduce","filter","bind","curry","isArray","isString","isObject","isFunction","extend","defaults","clone","merge"],function(t){fw[t]=Np[t]}),cx.extend({type:"series.line",dependencies:["grid","polar"],getInitialData:function(t,e){return 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r=this.childAt(0),a=t.hostModel,s=t.getItemVisual(e,"color");"image"!==r.type&&r.useStyle({strokeNoScale:!0});var l=i&&i.itemStyle,u=i&&i.hoverItemStyle,h=i&&i.symbolRotate,c=i&&i.symbolOffset,d=i&&i.labelModel,f=i&&i.hoverLabelModel,p=i&&i.hoverAnimation,g=i&&i.cursorStyle;if(!i||t.hasItemOption){var m=i&&i.itemModel?i.itemModel:t.getItemModel(e);l=m.getModel(mw).getItemStyle(["color"]),u=m.getModel(vw).getItemStyle(),h=m.getShallow("symbolRotate"),c=m.getShallow("symbolOffset"),d=m.getModel(yw),f=m.getModel(xw),p=m.getShallow("hoverAnimation"),g=m.getShallow("cursor")}else u=o({},u);var v=r.style;r.attr("rotation",(h||0)*Math.PI/180||0),c&&r.attr("position",[_r(c[0],n[0]),_r(c[1],n[1])]),g&&r.attr("cursor",g),r.setColor(s,i&&i.symbolInnerColor),r.setStyle(l);var y=t.getItemVisual(e,"opacity");null!=y&&(v.opacity=y);var x=t.getItemVisual(e,"liftZ"),_=r.__z2Origin;null!=x?null==_&&(r.__z2Origin=r.z2,r.z2+=x):null!=_&&(r.z2=_,r.__z2Origin=null);var w=i&&i.useNameLabel;$i(v,u,d,f,{labelFetcher:a,labelDataIndex:e,defaultText:function(e,n){return w?t.getName(e):zl(t,e)},isRectText:!0,autoColor:s}),r.off("mouseover").off("mouseout").off("emphasis").off("normal"),r.hoverStyle=u,qi(r);var b=Nl(n);if(p&&a.isAnimationEnabled()){var M=function(){if(!this.incremental){var t=b[1]/b[0];this.animateTo({scale:[Math.max(1.1*b[0],b[0]+3),Math.max(1.1*b[1],b[1]+3*t)]},400,"elasticOut")}},S=function(){this.incremental||this.animateTo({scale:b},400,"elasticOut")};r.on("mouseover",M).on("mouseout",S).on("emphasis",M).on("normal",S)}},pw.fadeOut=function(t,e){var n=this.childAt(0);this.silent=n.silent=!0,!(e&&e.keepLabel)&&(n.style.text=null),ar(n,{style:{opacity:0},scale:[0,0]},this._seriesModel,this.dataIndex,t)},u(El,Sg);var _w=Bl.prototype;_w.updateData=function(t,e){e=Fl(e);var n=this.group,i=t.hostModel,r=this._data,o=this._symbolCtor,a=Hl(t);r||n.removeAll(),t.diff(r).add(function(i){var r=t.getItemLayout(i);if(Vl(t,r,i,e)){var s=new o(t,i,a);s.attr("position",r),t.setItemGraphicEl(i,s),n.add(s)}}).update(function(s,l){var u=r.getItemGraphicEl(l),h=t.getItemLayout(s);Vl(t,h,s,e)?(u?(u.updateData(t,s,a),ar(u,{position:h},i)):(u=new o(t,s)).attr("position",h),n.add(u),t.setItemGraphicEl(s,u)):n.remove(u)}).remove(function(t){var e=r.getItemGraphicEl(t);e&&e.fadeOut(function(){n.remove(e)})}).execute(),this._data=t},_w.isPersistent=function(){return!0},_w.updateLayout=function(){var t=this._data;t&&t.eachItemGraphicEl(function(e,n){var i=t.getItemLayout(n);e.attr("position",i)})},_w.incrementalPrepareUpdate=function(t){this._seriesScope=Hl(t),this._data=null,this.group.removeAll()},_w.incrementalUpdate=function(t,e,n){n=Fl(n);for(var i=t.start;i0&&Xl(n[r-1]);r--);for(;i0&&Xl(n[o-1]);o--);for(;r=0){var a=r.getItemGraphicEl(o);if(!a){var s=r.getItemLayout(o);if(!s)return;(a=new El(r,o)).position=s,a.setZ(t.get("zlevel"),t.get("z")),a.ignore=isNaN(s[0])||isNaN(s[1]),a.__temp=!0,r.setItemGraphicEl(o,a),a.stopSymbolAnimation(!0),this.group.add(a)}a.highlight()}else ra.prototype.highlight.call(this,t,e,n,i)},downplay:function(t,e,n,i){var r=t.getData(),o=Tn(r,i);if(null!=o&&o>=0){var a=r.getItemGraphicEl(o);a&&(a.__temp?(r.setItemGraphicEl(o,null),this.group.remove(a)):a.downplay())}else ra.prototype.downplay.call(this,t,e,n,i)},_newPolyline:function(t){var e=this._polyline;return e&&this._lineGroup.remove(e),e=new Aw({shape:{points:t},silent:!0,z2:10}),this._lineGroup.add(e),this._polyline=e,e},_newPolygon:function(t,e){var n=this._polygon;return n&&this._lineGroup.remove(n),n=new kw({shape:{points:t,stackedOnPoints:e},silent:!0}),this._lineGroup.add(n),this._polygon=n,n},_updateAnimation:function(t,e,n,i,r,o){var a=this._polyline,s=this._polygon,l=t.hostModel,u=ww(this._data,t,this._stackedOnPoints,e,this._coordSys,n,this._valueOrigin,o),h=u.current,c=u.stackedOnCurrent,d=u.next,f=u.stackedOnNext;r&&(h=ru(u.current,n,r),c=ru(u.stackedOnCurrent,n,r),d=ru(u.next,n,r),f=ru(u.stackedOnNext,n,r)),a.shape.__points=u.current,a.shape.points=h,ar(a,{shape:{points:d}},l),s&&(s.setShape({points:h,stackedOnPoints:c}),ar(s,{shape:{points:d,stackedOnPoints:f}},l));for(var p=[],g=u.status,m=0;me&&(e=t[n]);return isFinite(e)?e:NaN},min:function(t){for(var e=1/0,n=0;ne[1]&&e.reverse(),e},getOtherAxis:function(){this.grid.getOtherAxis()},pointToData:function(t,e){return this.coordToData(this.toLocalCoord(t["x"===this.dim?0:1]),e)},toLocalCoord:null,toGlobalCoord:null},u(Nw,cw);var Rw={show:!0,zlevel:0,z:0,inverse:!1,name:"",nameLocation:"end",nameRotate:null,nameTruncate:{maxWidth:null,ellipsis:"...",placeholder:"."},nameTextStyle:{},nameGap:15,silent:!1,triggerEvent:!1,tooltip:{show:!1},axisPointer:{},axisLine:{show:!0,onZero:!0,onZeroAxisIndex:null,lineStyle:{color:"#333",width:1,type:"solid"},symbol:["none","none"],symbolSize:[10,15]},axisTick:{show:!0,inside:!1,length:5,lineStyle:{width:1}},axisLabel:{show:!0,inside:!1,rotate:0,showMinLabel:null,showMaxLabel:null,margin:8,fontSize:12},splitLine:{show:!0,lineStyle:{color:["#ccc"],width:1,type:"solid"}},splitArea:{show:!1,areaStyle:{color:["rgba(250,250,250,0.3)","rgba(200,200,200,0.3)"]}}},Bw={};Bw.categoryAxis=i({boundaryGap:!0,deduplication:null,splitLine:{show:!1},axisTick:{alignWithLabel:!1,interval:"auto"},axisLabel:{interval:"auto"}},Rw),Bw.valueAxis=i({boundaryGap:[0,0],splitNumber:5},Rw),Bw.timeAxis=a({scale:!0,min:"dataMin",max:"dataMax"},Bw.valueAxis),Bw.logAxis=a({scale:!0,logBase:10},Bw.valueAxis);var Vw=["value","category","time","log"],Fw=function(t,e,n,o){d(Vw,function(a){e.extend({type:t+"Axis."+a,mergeDefaultAndTheme:function(e,r){var o=this.layoutMode,s=o?Ur(e):{};i(e,r.getTheme().get(a+"Axis")),i(e,this.getDefaultOption()),e.type=n(t,e),o&&Zr(e,s,o)},optionUpdated:function(){"category"===this.option.type&&(this.__ordinalMeta=Rs.createByAxisModel(this))},getCategories:function(t){var e=this.option;if("category"===e.type)return t?e.data:this.__ordinalMeta.categories},getOrdinalMeta:function(){return this.__ordinalMeta},defaultOption:r([{},Bw[a+"Axis"],o],!0)})}),Iy.registerSubTypeDefaulter(t+"Axis",v(n,t))},Hw=Iy.extend({type:"cartesian2dAxis",axis:null,init:function(){Hw.superApply(this,"init",arguments),this.resetRange()},mergeOption:function(){Hw.superApply(this,"mergeOption",arguments),this.resetRange()},restoreData:function(){Hw.superApply(this,"restoreData",arguments),this.resetRange()},getCoordSysModel:function(){return this.ecModel.queryComponents({mainType:"grid",index:this.option.gridIndex,id:this.option.gridId})[0]}});i(Hw.prototype,K_);var Gw={offset:0};Fw("x",Hw,hu,Gw),Fw("y",Hw,hu,Gw),Iy.extend({type:"grid",dependencies:["xAxis","yAxis"],layoutMode:"box",coordinateSystem:null,defaultOption:{show:!1,zlevel:0,z:0,left:"10%",top:60,right:"10%",bottom:60,containLabel:!1,backgroundColor:"rgba(0,0,0,0)",borderWidth:1,borderColor:"#ccc"}});var Ww=du.prototype;Ww.type="grid",Ww.axisPointerEnabled=!0,Ww.getRect=function(){return this._rect},Ww.update=function(t,e){var n=this._axesMap;this._updateScale(t,this.model),d(n.x,function(t){il(t.scale,t.model)}),d(n.y,function(t){il(t.scale,t.model)}),d(n.x,function(t){fu(n,"y",t)}),d(n.y,function(t){fu(n,"x",t)}),this.resize(this.model,e)},Ww.resize=function(t,e,n){function i(){d(o,function(t){var e=t.isHorizontal(),n=e?[0,r.width]:[0,r.height],i=t.inverse?1:0;t.setExtent(n[i],n[1-i]),gu(t,e?r.x:r.y)})}var r=Gr(t.getBoxLayoutParams(),{width:e.getWidth(),height:e.getHeight()});this._rect=r;var o=this._axesList;i(),!n&&t.get("containLabel")&&(d(o,function(t){if(!t.model.get("axisLabel.inside")){var e=ll(t);if(e){var n=t.isHorizontal()?"height":"width",i=t.model.get("axisLabel.margin");r[n]-=e[n]+i,"top"===t.position?r.y+=e.height+i:"left"===t.position&&(r.x+=e.width+i)}}}),i())},Ww.getAxis=function(t,e){var n=this._axesMap[t];if(null!=n){if(null==e)for(var i in n)if(n.hasOwnProperty(i))return n[i];return n[e]}},Ww.getAxes=function(){return this._axesList.slice()},Ww.getCartesian=function(t,e){if(null!=t&&null!=e){var n="x"+t+"y"+e;return this._coordsMap[n]}w(t)&&(e=t.yAxisIndex,t=t.xAxisIndex);for(var i=0,r=this._coordsList;iu[1]?-1:1,c=["start"===r?u[0]-h*l:"end"===r?u[1]+h*l:(u[0]+u[1])/2,Su(r)?t.labelOffset+a*l:0],d=e.get("nameRotate");null!=d&&(d=d*Uw/180);var f;Su(r)?i=Yw(t.rotation,null!=d?d:t.rotation,a):(i=xu(t,r,d||0,u),null!=(f=t.axisNameAvailableWidth)&&(f=Math.abs(f/Math.sin(i.rotation)),!isFinite(f)&&(f=null)));var p=s.getFont(),g=e.get("nameTruncate",!0)||{},m=g.ellipsis,v=C(t.nameTruncateMaxWidth,g.maxWidth,f),y=null!=m&&null!=v?my(n,v,p,m,{minChar:2,placeholder:g.placeholder}):n,x=e.get("tooltip",!0),_=e.mainType,w={componentType:_,name:n,$vars:["name"]};w[_+"Index"]=e.componentIndex;var b=new kv({anid:"name",__fullText:n,__truncatedText:y,position:c,rotation:i.rotation,silent:_u(e),z2:1,tooltip:x&&x.show?o({content:n,formatter:function(){return n},formatterParams:w},x):null});Ki(b.style,s,{text:y,textFont:p,textFill:s.getTextColor()||e.get("axisLine.lineStyle.color"),textAlign:i.textAlign,textVerticalAlign:i.textVerticalAlign}),e.get("triggerEvent")&&(b.eventData=yu(e),b.eventData.targetType="axisName",b.eventData.name=n),this._dumbGroup.add(b),b.updateTransform(),this.group.add(b),b.decomposeTransform()}}},Yw=Xw.innerTextLayout=function(t,e,n){var i,r,o=Tr(e-t);return Dr(o)?(r=n>0?"top":"bottom",i="center"):Dr(o-Uw)?(r=n>0?"bottom":"top",i="center"):(r="middle",i=o>0&&o0?"right":"left":n>0?"left":"right"),{rotation:o,textAlign:i,textVerticalAlign:r}},qw=d,$w=v,Kw=as({type:"axis",_axisPointer:null,axisPointerClass:null,render:function(t,e,n,i){this.axisPointerClass&&Ou(t),Kw.superApply(this,"render",arguments),Bu(this,t,0,n,0,!0)},updateAxisPointer:function(t,e,n,i,r){Bu(this,t,0,n,0,!1)},remove:function(t,e){var n=this._axisPointer;n&&n.remove(e),Kw.superApply(this,"remove",arguments)},dispose:function(t,e){Vu(this,e),Kw.superApply(this,"dispose",arguments)}}),Qw=[];Kw.registerAxisPointerClass=function(t,e){Qw[t]=e},Kw.getAxisPointerClass=function(t){return t&&Qw[t]};var Jw=["axisLine","axisTickLabel","axisName"],tb=["splitArea","splitLine"],eb=Kw.extend({type:"cartesianAxis",axisPointerClass:"CartesianAxisPointer",render:function(t,e,n,i){this.group.removeAll();var r=this._axisGroup;if(this._axisGroup=new Sg,this.group.add(this._axisGroup),t.get("show")){var o=t.getCoordSysModel(),a=Fu(o,t),s=new Xw(t,a);d(Jw,s.add,s),this._axisGroup.add(s.getGroup()),d(tb,function(e){t.get(e+".show")&&this["_"+e](t,o)},this),cr(r,this._axisGroup,t),eb.superCall(this,"render",t,e,n,i)}},remove:function(){this._splitAreaColors=null},_splitLine:function(t,e){var n=t.axis;if(!n.scale.isBlank()){var i=t.getModel("splitLine"),r=i.getModel("lineStyle"),o=r.get("color");o=y(o)?o:[o];for(var s=e.coordinateSystem.getRect(),l=n.isHorizontal(),u=0,h=n.getTicksCoords({tickModel:i}),c=[],d=[],f=r.getLineStyle(),p=0;p1){var c;"string"==typeof r?c=Ow[r]:"function"==typeof r&&(c=r),c&&t.setData(i.downSample(i.mapDimension(s.dim),1/h,c,zw))}}}}}("line")),cx.extend({type:"series.__base_bar__",getInitialData:function(t,e){return Os(this.getSource(),this)},getMarkerPosition:function(t){var e=this.coordinateSystem;if(e){var n=e.dataToPoint(e.clampData(t)),i=this.getData(),r=i.getLayout("offset"),o=i.getLayout("size");return n[e.getBaseAxis().isHorizontal()?0:1]+=r+o/2,n}return[NaN,NaN]},defaultOption:{zlevel:0,z:2,coordinateSystem:"cartesian2d",legendHoverLink:!0,barMinHeight:0,barMinAngle:0,large:!1,largeThreshold:400,progressive:3e3,progressiveChunkMode:"mod",itemStyle:{},emphasis:{}}}).extend({type:"series.bar",dependencies:["grid","polar"],brushSelector:"rect",getProgressive:function(){return!!this.get("large")&&this.get("progressive")},getProgressiveThreshold:function(){var t=this.get("progressiveThreshold"),e=this.get("largeThreshold");return e>t&&(t=e),t}});var nb=Sm([["fill","color"],["stroke","borderColor"],["lineWidth","borderWidth"],["stroke","barBorderColor"],["lineWidth","barBorderWidth"],["opacity"],["shadowBlur"],["shadowOffsetX"],["shadowOffsetY"],["shadowColor"]]),ib={getBarItemStyle:function(t){var e=nb(this,t);if(this.getBorderLineDash){var n=this.getBorderLineDash();n&&(e.lineDash=n)}return e}},rb=["itemStyle","barBorderWidth"];o(pr.prototype,ib),ls({type:"bar",render:function(t,e,n){this._updateDrawMode(t);var i=t.get("coordinateSystem");return"cartesian2d"!==i&&"polar"!==i||(this._isLargeDraw?this._renderLarge(t,e,n):this._renderNormal(t,e,n)),this.group},incrementalPrepareRender:function(t,e,n){this._clear(),this._updateDrawMode(t)},incrementalRender:function(t,e,n,i){this._incrementalRenderLarge(t,e)},_updateDrawMode:function(t){var e=t.pipelineContext.large;(null==this._isLargeDraw||e^this._isLargeDraw)&&(this._isLargeDraw=e,this._clear())},_renderNormal:function(t,e,n){var i,r=this.group,o=t.getData(),a=this._data,s=t.coordinateSystem,l=s.getBaseAxis();"cartesian2d"===s.type?i=l.isHorizontal():"polar"===s.type&&(i="angle"===l.dim);var u=t.isAnimationEnabled()?t:null;o.diff(a).add(function(e){if(o.hasValue(e)){var n=o.getItemModel(e),a=ab[s.type](o,e,n),l=ob[s.type](o,e,n,a,i,u);o.setItemGraphicEl(e,l),r.add(l),Uu(l,o,e,n,a,t,i,"polar"===s.type)}}).update(function(e,n){var l=a.getItemGraphicEl(n);if(o.hasValue(e)){var h=o.getItemModel(e),c=ab[s.type](o,e,h);l?ar(l,{shape:c},u,e):l=ob[s.type](o,e,h,c,i,u,!0),o.setItemGraphicEl(e,l),r.add(l),Uu(l,o,e,h,c,t,i,"polar"===s.type)}else r.remove(l)}).remove(function(t){var e=a.getItemGraphicEl(t);"cartesian2d"===s.type?e&&Wu(t,u,e):e&&Zu(t,u,e)}).execute(),this._data=o},_renderLarge:function(t,e,n){this._clear(),ju(t,this.group)},_incrementalRenderLarge:function(t,e){ju(e,this.group,!0)},dispose:R,remove:function(t){this._clear(t)},_clear:function(t){var e=this.group,n=this._data;t&&t.get("animation")&&n&&!this._isLargeDraw?n.eachItemGraphicEl(function(e){"sector"===e.type?Zu(e.dataIndex,t,e):Wu(e.dataIndex,t,e)}):e.removeAll(),this._data=null}});var ob={cartesian2d:function(t,e,n,i,r,a,s){var l=new Fv({shape:o({},i)});if(a){var u=l.shape,h=r?"height":"width",c={};u[h]=0,c[h]=i[h],ty[s?"updateProps":"initProps"](l,{shape:c},a,e)}return l},polar:function(t,e,n,i,r,o,s){var l=i.startAngle0?1:-1,a=i.height>0?1:-1;return{x:i.x+o*r/2,y:i.y+a*r/2,width:i.width-o*r,height:i.height-a*r}},polar:function(t,e,n){var i=t.getItemLayout(e);return{cx:i.cx,cy:i.cy,r0:i.r0,r:i.r,startAngle:i.startAngle,endAngle:i.endAngle}}},sb=xi.extend({type:"largeBar",shape:{points:[]},buildPath:function(t,e){for(var n=e.points,i=this.__startPoint,r=this.__valueIdx,o=0;o=0?"p":"n",b=m;p&&(r[a][_]||(r[a][_]={p:m,n:m}),b=r[a][_][w]);var M,S,I,C;if(g)M=b,S=(T=n.dataToPoint([x,_]))[1]+l,I=T[0]-m,C=u,Math.abs(I)0&&"scale"!==u){var d=r.getItemLayout(0),f=Math.max(n.getWidth(),n.getHeight())/2,p=m(a.removeClipPath,a);a.setClipPath(this._createClipPath(d.cx,d.cy,f,d.startAngle,d.clockwise,p,t))}this._data=r}},dispose:function(){},_createClipPath:function(t,e,n,i,r,o,a){var s=new zv({shape:{cx:t,cy:e,r0:0,r:n,startAngle:i,endAngle:i,clockwise:r}});return sr(s,{shape:{endAngle:i+(r?1:-1)*Math.PI*2}},a,o),s},containPoint:function(t,e){var n=e.getData().getItemLayout(0);if(n){var i=t[0]-n.cx,r=t[1]-n.cy,o=Math.sqrt(i*i+r*r);return o<=n.r&&o>=n.r0}}});var db=function(t,e,n,i){var r,o,a=t.getData(),s=[],l=!1;a.each(function(n){var i,u,h,c,d=a.getItemLayout(n),f=a.getItemModel(n),p=f.getModel("label"),g=p.get("position")||f.get("emphasis.label.position"),m=f.getModel("labelLine"),v=m.get("length"),y=m.get("length2"),x=(d.startAngle+d.endAngle)/2,_=Math.cos(x),w=Math.sin(x);r=d.cx,o=d.cy;var b="inside"===g||"inner"===g;if("center"===g)i=d.cx,u=d.cy,c="center";else{var M=(b?(d.r+d.r0)/2*_:d.r*_)+r,S=(b?(d.r+d.r0)/2*w:d.r*w)+o;if(i=M+3*_,u=S+3*w,!b){var I=M+_*(v+e-d.r),C=S+w*(v+e-d.r),T=I+(_<0?-1:1)*y,D=C;i=T+(_<0?-5:5),u=D,h=[[M,S],[I,C],[T,D]]}c=b?"center":_>0?"left":"right"}var A=p.getFont(),k=p.get("rotate")?_<0?-x+Math.PI:-x:0,P=ce(t.getFormattedLabel(n,"normal")||a.getName(n),A,c,"top");l=!!k,d.label={x:i,y:u,position:g,height:P.height,len:v,len2:y,linePoints:h,textAlign:c,verticalAlign:"middle",rotation:k,inside:b},b||s.push(d.label)}),!l&&t.get("avoidLabelOverlap")&&Ju(s,r,o,e,n,i)},fb=2*Math.PI,pb=Math.PI/180;!function(t,e){d(e,function(e){e.update="updateView",ts(e,function(n,i){var r={};return i.eachComponent({mainType:"series",subType:t,query:n},function(t){t[e.method]&&t[e.method](n.name,n.dataIndex);var i=t.getData();i.each(function(e){var n=i.getName(e);r[n]=t.isSelected(n)||!1})}),{name:n.name,selected:r}})})}("pie",[{type:"pieToggleSelect",event:"pieselectchanged",method:"toggleSelected"},{type:"pieSelect",event:"pieselected",method:"select"},{type:"pieUnSelect",event:"pieunselected",method:"unSelect"}]),ns(function(t){return{getTargetSeries:function(e){var n={},i=N();return e.eachSeriesByType(t,function(t){t.__paletteScope=n,i.set(t.uid,t)}),i},reset:function(t,e){var n=t.getRawData(),i={},r=t.getData();r.each(function(t){var e=r.getRawIndex(t);i[e]=t}),n.each(function(e){var o=i[e],a=null!=o&&r.getItemVisual(o,"color",!0);if(a)n.setItemVisual(e,"color",a);else{var s=n.getItemModel(e).get("itemStyle.color")||t.getColorFromPalette(n.getName(e)||e+"",t.__paletteScope,n.count());n.setItemVisual(e,"color",s),null!=o&&r.setItemVisual(o,"color",s)}})}}}("pie")),es(v(function(t,e,n,i){e.eachSeriesByType(t,function(t){var e=t.getData(),i=e.mapDimension("value"),r=t.get("center"),o=t.get("radius");y(o)||(o=[0,o]),y(r)||(r=[r,r]);var a=n.getWidth(),s=n.getHeight(),l=Math.min(a,s),u=_r(r[0],a),h=_r(r[1],s),c=_r(o[0],l/2),d=_r(o[1],l/2),f=-t.get("startAngle")*pb,p=t.get("minAngle")*pb,g=0;e.each(i,function(t){!isNaN(t)&&g++});var m=e.getSum(i),v=Math.PI/(m||g)*2,x=t.get("clockwise"),_=t.get("roseType"),w=t.get("stillShowZeroSum"),b=e.getDataExtent(i);b[0]=0;var M=fb,S=0,I=f,C=x?1:-1;if(e.each(i,function(t,n){var i;if(isNaN(t))e.setItemLayout(n,{angle:NaN,startAngle:NaN,endAngle:NaN,clockwise:x,cx:u,cy:h,r0:c,r:_?NaN:d});else{(i="area"!==_?0===m&&w?v:t*v:fb/g)=0;s--){var l=2*s,u=i[l]-o/2,h=i[l+1]-a/2;if(t>=u&&e>=h&&t<=u+o&&e<=h+a)return s}return-1}}),mb=th.prototype;mb.isPersistent=function(){return!this._incremental},mb.updateData=function(t){this.group.removeAll();var e=new gb({rectHover:!0,cursor:"default"});e.setShape({points:t.getLayout("symbolPoints")}),this._setCommon(e,t),this.group.add(e),this._incremental=null},mb.updateLayout=function(t){if(!this._incremental){var e=t.getLayout("symbolPoints");this.group.eachChild(function(t){if(null!=t.startIndex){var n=2*(t.endIndex-t.startIndex),i=4*t.startIndex*2;e=new Float32Array(e.buffer,i,n)}t.setShape("points",e)})}},mb.incrementalPrepareUpdate=function(t){this.group.removeAll(),this._clearIncremental(),t.count()>2e6?(this._incremental||(this._incremental=new Di({silent:!0})),this.group.add(this._incremental)):this._incremental=null},mb.incrementalUpdate=function(t,e){var n;this._incremental?(n=new gb,this._incremental.addDisplayable(n,!0)):((n=new gb({rectHover:!0,cursor:"default",startIndex:t.start,endIndex:t.end})).incremental=!0,this.group.add(n)),n.setShape({points:e.getLayout("symbolPoints")}),this._setCommon(n,e,!!this._incremental)},mb._setCommon=function(t,e,n){var i=e.hostModel,r=e.getVisual("symbolSize");t.setShape("size",r instanceof Array?r:[r,r]),t.symbolProxy=cl(e.getVisual("symbol"),0,0,0,0),t.setColor=t.symbolProxy.setColor;var o=t.shape.size[0]<4;t.useStyle(i.getModel("itemStyle").getItemStyle(o?["color","shadowBlur","shadowColor"]:["color"]));var a=e.getVisual("color");a&&t.setColor(a),n||(t.seriesIndex=i.seriesIndex,t.on("mousemove",function(e){t.dataIndex=null;var n=t.findDataIndex(e.offsetX,e.offsetY);n>=0&&(t.dataIndex=n+(t.startIndex||0))}))},mb.remove=function(){this._clearIncremental(),this._incremental=null,this.group.removeAll()},mb._clearIncremental=function(){var t=this._incremental;t&&t.clearDisplaybles()},ls({type:"scatter",render:function(t,e,n){var i=t.getData();this._updateSymbolDraw(i,t).updateData(i),this._finished=!0},incrementalPrepareRender:function(t,e,n){var i=t.getData();this._updateSymbolDraw(i,t).incrementalPrepareUpdate(i),this._finished=!1},incrementalRender:function(t,e,n){this._symbolDraw.incrementalUpdate(t,e.getData()),this._finished=t.end===e.getData().count()},updateTransform:function(t,e,n){var i=t.getData();if(this.group.dirty(),!this._finished||i.count()>1e4||!this._symbolDraw.isPersistent())return{update:!0};var r=Lw().reset(t);r.progress&&r.progress({start:0,end:i.count()},i),this._symbolDraw.updateLayout(i)},_updateSymbolDraw:function(t,e){var n=this._symbolDraw,i=e.pipelineContext.large;return n&&i===this._isLargeDraw||(n&&n.remove(),n=this._symbolDraw=i?new th:new Bl,this._isLargeDraw=i,this.group.removeAll()),this.group.add(n.group),n},remove:function(t,e){this._symbolDraw&&this._symbolDraw.remove(!0),this._symbolDraw=null},dispose:function(){}}),ns(Pw("scatter","circle")),es(Lw("scatter")),Qa(function(t){var e=t.graphic;y(e)?e[0]&&e[0].elements?t.graphic=[t.graphic[0]]:t.graphic=[{elements:e}]:e&&!e.elements&&(t.graphic=[{elements:[e]}])});var vb=os({type:"graphic",defaultOption:{elements:[],parentId:null},_elOptionsToUpdate:null,mergeOption:function(t){var e=this.option.elements;this.option.elements=null,vb.superApply(this,"mergeOption",arguments),this.option.elements=e},optionUpdated:function(t,e){var n=this.option,i=(e?n:t).elements,r=n.elements=e?[]:n.elements,o=[];this._flatten(i,o);var a=Mn(r,o);Sn(a);var s=this._elOptionsToUpdate=[];d(a,function(t,e){var n=t.option;n&&(s.push(n),oh(t,n),ah(r,e,n),sh(r[e],n))},this);for(var l=r.length-1;l>=0;l--)null==r[l]?r.splice(l,1):delete r[l].$action},_flatten:function(t,e,n){d(t,function(t){if(t){n&&(t.parentOption=n),e.push(t);var i=t.children;"group"===t.type&&i&&this._flatten(i,e,t),delete t.children}},this)},useElOptionsToUpdate:function(){var t=this._elOptionsToUpdate;return this._elOptionsToUpdate=null,t}});as({type:"graphic",init:function(t,e){this._elMap=N(),this._lastGraphicModel},render:function(t,e,n){t!==this._lastGraphicModel&&this._clear(),this._lastGraphicModel=t,this._updateElements(t,n),this._relocate(t,n)},_updateElements:function(t,e){var n=t.useElOptionsToUpdate();if(n){var i=this._elMap,r=this.group;d(n,function(t){var e=t.$action,n=t.id,o=i.get(n),a=t.parentId,s=null!=a?i.get(a):r;if("text"===t.type){var l=t.style;t.hv&&t.hv[1]&&(l.textVerticalAlign=l.textBaseline=null),!l.hasOwnProperty("textFill")&&l.fill&&(l.textFill=l.fill),!l.hasOwnProperty("textStroke")&&l.stroke&&(l.textStroke=l.stroke)}var u=ih(t);e&&"merge"!==e?"replace"===e?(nh(o,i),eh(n,s,u,i)):"remove"===e&&nh(o,i):o?o.attr(u):eh(n,s,u,i);var h=i.get(n);h&&(h.__ecGraphicWidth=t.width,h.__ecGraphicHeight=t.height)})}},_relocate:function(t,e){for(var n=t.option.elements,i=this.group,r=this._elMap,o=n.length-1;o>=0;o--){var a=n[o],s=r.get(a.id);if(s){var l=s.parent;Wr(s,a,l===i?{width:e.getWidth(),height:e.getHeight()}:{width:l.__ecGraphicWidth||0,height:l.__ecGraphicHeight||0},null,{hv:a.hv,boundingMode:a.bounding})}}},_clear:function(){var t=this._elMap;t.each(function(e){nh(e,t)}),this._elMap=N()},dispose:function(){this._clear()}});var yb=function(t,e){var n,i=[],r=t.seriesIndex;if(null==r||!(n=e.getSeriesByIndex(r)))return{point:[]};var o=n.getData(),a=Tn(o,t);if(null==a||a<0||y(a))return{point:[]};var s=o.getItemGraphicEl(a),l=n.coordinateSystem;if(n.getTooltipPosition)i=n.getTooltipPosition(a)||[];else if(l&&l.dataToPoint)i=l.dataToPoint(o.getValues(f(l.dimensions,function(t){return o.mapDimension(t)}),a,!0))||[];else if(s){var u=s.getBoundingRect().clone();u.applyTransform(s.transform),i=[u.x+u.width/2,u.y+u.height/2]}return{point:i,el:s}},xb=d,_b=v,wb=Dn(),bb=(os({type:"axisPointer",coordSysAxesInfo:null,defaultOption:{show:"auto",triggerOn:null,zlevel:0,z:50,type:"line",snap:!1,triggerTooltip:!0,value:null,status:null,link:[],animation:null,animationDurationUpdate:200,lineStyle:{color:"#aaa",width:1,type:"solid"},shadowStyle:{color:"rgba(150,150,150,0.3)"},label:{show:!0,formatter:null,precision:"auto",margin:3,color:"#fff",padding:[5,7,5,7],backgroundColor:"auto",borderColor:null,borderWidth:0,shadowBlur:3,shadowColor:"#aaa"},handle:{show:!1,icon:"M10.7,11.9v-1.3H9.3v1.3c-4.9,0.3-8.8,4.4-8.8,9.4c0,5,3.9,9.1,8.8,9.4h1.3c4.9-0.3,8.8-4.4,8.8-9.4C19.5,16.3,15.6,12.2,10.7,11.9z M13.3,24.4H6.7v-1.2h6.6z M13.3,22H6.7v-1.2h6.6z 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r=e.get("value"),o=e.get("status");if(this._axisModel=t,this._axisPointerModel=e,this._api=n,i||this._lastValue!==r||this._lastStatus!==o){this._lastValue=r,this._lastStatus=o;var a=this._group,s=this._handle;if(!o||"hide"===o)return a&&a.hide(),void(s&&s.hide());a&&a.show(),s&&s.show();var l={};this.makeElOption(l,r,t,e,n);var u=l.graphicKey;u!==this._lastGraphicKey&&this.clear(n),this._lastGraphicKey=u;var h=this._moveAnimation=this.determineAnimation(t,e);if(a){var c=v(Ch,e,h);this.updatePointerEl(a,l,c,e),this.updateLabelEl(a,l,c,e)}else a=this._group=new Sg,this.createPointerEl(a,l,t,e),this.createLabelEl(a,l,t,e),n.getZr().add(a);kh(a,e,!0),this._renderHandle(r)}},remove:function(t){this.clear(t)},dispose:function(t){this.clear(t)},determineAnimation:function(t,e){var n=e.get("animation"),i=t.axis,r="category"===i.type,o=e.get("snap");if(!o&&!r)return!1;if("auto"===n||null==n){var a=this.animationThreshold;if(r&&i.getBandWidth()>a)return!0;if(o){var s=zu(t).seriesDataCount,l=i.getExtent();return Math.abs(l[0]-l[1])/s>a}return!1}return!0===n},makeElOption:function(t,e,n,i,r){},createPointerEl:function(t,e,n,i){var r=e.pointer;if(r){var o=Ib(t).pointerEl=new ty[r.type](Cb(e.pointer));t.add(o)}},createLabelEl:function(t,e,n,i){if(e.label){var r=Ib(t).labelEl=new Fv(Cb(e.label));t.add(r),Dh(r,i)}},updatePointerEl:function(t,e,n){var i=Ib(t).pointerEl;i&&(i.setStyle(e.pointer.style),n(i,{shape:e.pointer.shape}))},updateLabelEl:function(t,e,n,i){var r=Ib(t).labelEl;r&&(r.setStyle(e.label.style),n(r,{shape:e.label.shape,position:e.label.position}),Dh(r,i))},_renderHandle:function(t){if(!this._dragging&&this.updateHandleTransform){var e=this._axisPointerModel,n=this._api.getZr(),i=this._handle,r=e.getModel("handle"),o=e.get("status");if(!r.get("show")||!o||"hide"===o)return i&&n.remove(i),void(this._handle=null);var a;this._handle||(a=!0,i=this._handle=fr(r.get("icon"),{cursor:"move",draggable:!0,onmousemove:function(t){tm(t.event)},onmousedown:Tb(this._onHandleDragMove,this,0,0),drift:Tb(this._onHandleDragMove,this),ondragend:Tb(this._onHandleDragEnd,this)}),n.add(i)),kh(i,e,!1);var s=["color","borderColor","borderWidth","opacity","shadowColor","shadowBlur","shadowOffsetX","shadowOffsetY"];i.setStyle(r.getItemStyle(null,s));var l=r.get("size");y(l)||(l=[l,l]),i.attr("scale",[l[0]/2,l[1]/2]),ha(this,"_doDispatchAxisPointer",r.get("throttle")||0,"fixRate"),this._moveHandleToValue(t,a)}},_moveHandleToValue:function(t,e){Ch(this._axisPointerModel,!e&&this._moveAnimation,this._handle,Ah(this.getHandleTransform(t,this._axisModel,this._axisPointerModel)))},_onHandleDragMove:function(t,e){var n=this._handle;if(n){this._dragging=!0;var i=this.updateHandleTransform(Ah(n),[t,e],this._axisModel,this._axisPointerModel);this._payloadInfo=i,n.stopAnimation(),n.attr(Ah(i)),Ib(n).lastProp=null,this._doDispatchAxisPointer()}},_doDispatchAxisPointer:function(){if(this._handle){var t=this._payloadInfo,e=this._axisModel;this._api.dispatchAction({type:"updateAxisPointer",x:t.cursorPoint[0],y:t.cursorPoint[1],tooltipOption:t.tooltipOption,axesInfo:[{axisDim:e.axis.dim,axisIndex:e.componentIndex}]})}},_onHandleDragEnd:function(t){if(this._dragging=!1,this._handle){var e=this._axisPointerModel.get("value");this._moveHandleToValue(e),this._api.dispatchAction({type:"hideTip"})}},getHandleTransform:null,updateHandleTransform:null,clear:function(t){this._lastValue=null,this._lastStatus=null;var e=t.getZr(),n=this._group,i=this._handle;e&&n&&(this._lastGraphicKey=null,n&&e.remove(n),i&&e.remove(i),this._group=null,this._handle=null,this._payloadInfo=null)},doClear:function(){},buildLabel:function(t,e,n){return n=n||0,{x:t[n],y:t[1-n],width:e[n],height:e[1-n]}}}).constructor=Ih,En(Ih);var Db=Ih.extend({makeElOption:function(t,e,n,i,r){var o=n.axis,a=o.grid,s=i.get("type"),l=Vh(a,o).getOtherAxis(o).getGlobalExtent(),u=o.toGlobalCoord(o.dataToCoord(e,!0));if(s&&"none"!==s){var h=Ph(i),c=Ab[s](o,u,l,h);c.style=h,t.graphicKey=c.type,t.pointer=c}Nh(e,t,Fu(a.model,n),n,i,r)},getHandleTransform:function(t,e,n){var i=Fu(e.axis.grid.model,e,{labelInside:!1});return i.labelMargin=n.get("handle.margin"),{position:Eh(e.axis,t,i),rotation:i.rotation+(i.labelDirection<0?Math.PI:0)}},updateHandleTransform:function(t,e,n,i){var r=n.axis,o=r.grid,a=r.getGlobalExtent(!0),s=Vh(o,r).getOtherAxis(r).getGlobalExtent(),l="x"===r.dim?0:1,u=t.position;u[l]+=e[l],u[l]=Math.min(a[1],u[l]),u[l]=Math.max(a[0],u[l]);var h=(s[1]+s[0])/2,c=[h,h];c[l]=u[l];var d=[{verticalAlign:"middle"},{align:"center"}];return{position:u,rotation:t.rotation,cursorPoint:c,tooltipOption:d[l]}}}),Ab={line:function(t,e,n,i){var r=Rh([e,n[0]],[e,n[1]],Fh(t));return zi({shape:r,style:i}),{type:"Line",shape:r}},shadow:function(t,e,n,i){var r=Math.max(1,t.getBandWidth()),o=n[1]-n[0];return{type:"Rect",shape:Bh([e-r/2,n[0]],[r,o],Fh(t))}}};Kw.registerAxisPointerClass("CartesianAxisPointer",Db),Qa(function(t){if(t){(!t.axisPointer||0===t.axisPointer.length)&&(t.axisPointer={});var e=t.axisPointer.link;e&&!y(e)&&(t.axisPointer.link=[e])}}),Ja(Xx.PROCESSOR.STATISTIC,function(t,e){t.getComponent("axisPointer").coordSysAxesInfo=Tu(t,e)}),ts({type:"updateAxisPointer",event:"updateAxisPointer",update:":updateAxisPointer"},function(t,e,n){var i=t.currTrigger,r=[t.x,t.y],o=t,a=t.dispatchAction||m(n.dispatchAction,n),s=e.getComponent("axisPointer").coordSysAxesInfo;if(s){vh(r)&&(r=yb({seriesIndex:o.seriesIndex,dataIndex:o.dataIndex},e).point);var l=vh(r),u=o.axesInfo,h=s.axesInfo,c="leave"===i||vh(r),d={},f={},p={list:[],map:{}},g={showPointer:_b(hh,f),showTooltip:_b(ch,p)};xb(s.coordSysMap,function(t,e){var n=l||t.containPoint(r);xb(s.coordSysAxesInfo[e],function(t,e){var i=t.axis,o=gh(u,t);if(!c&&n&&(!u||o)){var a=o&&o.value;null!=a||l||(a=i.pointToData(r)),null!=a&&lh(t,a,g,!1,d)}})});var v={};return xb(h,function(t,e){var n=t.linkGroup;n&&!f[e]&&xb(n.axesInfo,function(e,i){var r=f[i];if(e!==t&&r){var o=r.value;n.mapper&&(o=t.axis.scale.parse(n.mapper(o,mh(e),mh(t)))),v[t.key]=o}})}),xb(v,function(t,e){lh(h[e],t,g,!0,d)}),dh(f,h,d),fh(p,r,t,a),ph(h,0,n),d}}),os({type:"tooltip",dependencies:["axisPointer"],defaultOption:{zlevel:0,z:8,show:!0,showContent:!0,trigger:"item",triggerOn:"mousemove|click",alwaysShowContent:!1,displayMode:"single",confine:!1,showDelay:0,hideDelay:100,transitionDuration:.4,enterable:!1,backgroundColor:"rgba(50,50,50,0.7)",borderColor:"#333",borderRadius:4,borderWidth:0,padding:5,extraCssText:"",axisPointer:{type:"line",axis:"auto",animation:"auto",animationDurationUpdate:200,animationEasingUpdate:"exponentialOut",crossStyle:{color:"#999",width:1,type:"dashed",textStyle:{}}},textStyle:{color:"#fff",fontSize:14}}});var kb=d,Pb=zr,Lb=["","-webkit-","-moz-","-o-"];Zh.prototype={constructor:Zh,_enterable:!0,update:function(){var t=this._container,e=t.currentStyle||document.defaultView.getComputedStyle(t),n=t.style;"absolute"!==n.position&&"absolute"!==e.position&&(n.position="relative")},show:function(t){clearTimeout(this._hideTimeout);var e=this.el;e.style.cssText="position:absolute;display:block;border-style:solid;white-space:nowrap;z-index:9999999;"+Wh(t)+";left:"+this._x+"px;top:"+this._y+"px;"+(t.get("extraCssText")||""),e.style.display=e.innerHTML?"block":"none",this._show=!0},setContent:function(t){this.el.innerHTML=null==t?"":t},setEnterable:function(t){this._enterable=t},getSize:function(){var t=this.el;return[t.clientWidth,t.clientHeight]},moveTo:function(t,e){var n,i=this._zr;i&&i.painter&&(n=i.painter.getViewportRootOffset())&&(t+=n.offsetLeft,e+=n.offsetTop);var r=this.el.style;r.left=t+"px",r.top=e+"px",this._x=t,this._y=e},hide:function(){this.el.style.display="none",this._show=!1},hideLater:function(t){!this._show||this._inContent&&this._enterable||(t?(this._hideDelay=t,this._show=!1,this._hideTimeout=setTimeout(m(this.hide,this),t)):this.hide())},isShow:function(){return this._show}};var Ob=m,zb=d,Eb=_r,Nb=new Fv({shape:{x:-1,y:-1,width:2,height:2}});as({type:"tooltip",init:function(t,e){if(!bp.node){var n=new Zh(e.getDom(),e);this._tooltipContent=n}},render:function(t,e,n){if(!bp.node&&!bp.wxa){this.group.removeAll(),this._tooltipModel=t,this._ecModel=e,this._api=n,this._lastDataByCoordSys=null,this._alwaysShowContent=t.get("alwaysShowContent");var i=this._tooltipContent;i.update(),i.setEnterable(t.get("enterable")),this._initGlobalListener(),this._keepShow()}},_initGlobalListener:function(){var t=this._tooltipModel.get("triggerOn");yh("itemTooltip",this._api,Ob(function(e,n,i){"none"!==t&&(t.indexOf(e)>=0?this._tryShow(n,i):"leave"===e&&this._hide(i))},this))},_keepShow:function(){var t=this._tooltipModel,e=this._ecModel,n=this._api;if(null!=this._lastX&&null!=this._lastY&&"none"!==t.get("triggerOn")){var i=this;clearTimeout(this._refreshUpdateTimeout),this._refreshUpdateTimeout=setTimeout(function(){i.manuallyShowTip(t,e,n,{x:i._lastX,y:i._lastY})})}},manuallyShowTip:function(t,e,n,i){if(i.from!==this.uid&&!bp.node){var r=Xh(i,n);this._ticket="";var o=i.dataByCoordSys;if(i.tooltip&&null!=i.x&&null!=i.y){var a=Nb;a.position=[i.x,i.y],a.update(),a.tooltip=i.tooltip,this._tryShow({offsetX:i.x,offsetY:i.y,target:a},r)}else if(o)this._tryShow({offsetX:i.x,offsetY:i.y,position:i.position,event:{},dataByCoordSys:i.dataByCoordSys,tooltipOption:i.tooltipOption},r);else if(null!=i.seriesIndex){if(this._manuallyAxisShowTip(t,e,n,i))return;var s=yb(i,e),l=s.point[0],u=s.point[1];null!=l&&null!=u&&this._tryShow({offsetX:l,offsetY:u,position:i.position,target:s.el,event:{}},r)}else null!=i.x&&null!=i.y&&(n.dispatchAction({type:"updateAxisPointer",x:i.x,y:i.y}),this._tryShow({offsetX:i.x,offsetY:i.y,position:i.position,target:n.getZr().findHover(i.x,i.y).target,event:{}},r))}},manuallyHideTip:function(t,e,n,i){var r=this._tooltipContent;!this._alwaysShowContent&&this._tooltipModel&&r.hideLater(this._tooltipModel.get("hideDelay")),this._lastX=this._lastY=null,i.from!==this.uid&&this._hide(Xh(i,n))},_manuallyAxisShowTip:function(t,e,n,i){var r=i.seriesIndex,o=i.dataIndex,a=e.getComponent("axisPointer").coordSysAxesInfo;if(null!=r&&null!=o&&null!=a){var s=e.getSeriesByIndex(r);if(s&&"axis"===(t=Uh([s.getData().getItemModel(o),s,(s.coordinateSystem||{}).model,t])).get("trigger"))return n.dispatchAction({type:"updateAxisPointer",seriesIndex:r,dataIndex:o,position:i.position}),!0}},_tryShow:function(t,e){var n=t.target;if(this._tooltipModel){this._lastX=t.offsetX,this._lastY=t.offsetY;var i=t.dataByCoordSys;i&&i.length?this._showAxisTooltip(i,t):n&&null!=n.dataIndex?(this._lastDataByCoordSys=null,this._showSeriesItemTooltip(t,n,e)):n&&n.tooltip?(this._lastDataByCoordSys=null,this._showComponentItemTooltip(t,n,e)):(this._lastDataByCoordSys=null,this._hide(e))}},_showOrMove:function(t,e){var n=t.get("showDelay");e=m(e,this),clearTimeout(this._showTimout),n>0?this._showTimout=setTimeout(e,n):e()},_showAxisTooltip:function(t,e){var n=this._ecModel,i=this._tooltipModel,r=[e.offsetX,e.offsetY],o=[],a=[],s=Uh([e.tooltipOption,i]);zb(t,function(t){zb(t.dataByAxis,function(t){var e=n.getComponent(t.axisDim+"Axis",t.axisIndex),i=t.value,r=[];if(e&&null!=i){var s=zh(i,e.axis,n,t.seriesDataIndices,t.valueLabelOpt);d(t.seriesDataIndices,function(o){var l=n.getSeriesByIndex(o.seriesIndex),u=o.dataIndexInside,h=l&&l.getDataParams(u);h.axisDim=t.axisDim,h.axisIndex=t.axisIndex,h.axisType=t.axisType,h.axisId=t.axisId,h.axisValue=sl(e.axis,i),h.axisValueLabel=s,h&&(a.push(h),r.push(l.formatTooltip(u,!0)))});var l=s;o.push((l?Er(l)+"
":"")+r.join("
"))}})},this),o.reverse(),o=o.join("

");var l=e.position;this._showOrMove(s,function(){this._updateContentNotChangedOnAxis(t)?this._updatePosition(s,l,r[0],r[1],this._tooltipContent,a):this._showTooltipContent(s,o,a,Math.random(),r[0],r[1],l)})},_showSeriesItemTooltip:function(t,e,n){var i=this._ecModel,r=e.seriesIndex,o=i.getSeriesByIndex(r),a=e.dataModel||o,s=e.dataIndex,l=e.dataType,u=a.getData(),h=Uh([u.getItemModel(s),a,o&&(o.coordinateSystem||{}).model,this._tooltipModel]),c=h.get("trigger");if(null==c||"item"===c){var d=a.getDataParams(s,l),f=a.formatTooltip(s,!1,l),p="item_"+a.name+"_"+s;this._showOrMove(h,function(){this._showTooltipContent(h,f,d,p,t.offsetX,t.offsetY,t.position,t.target)}),n({type:"showTip",dataIndexInside:s,dataIndex:u.getRawIndex(s),seriesIndex:r,from:this.uid})}},_showComponentItemTooltip:function(t,e,n){var i=e.tooltip;if("string"==typeof i){var r=i;i={content:r,formatter:r}}var o=new pr(i,this._tooltipModel,this._ecModel),a=o.get("content"),s=Math.random();this._showOrMove(o,function(){this._showTooltipContent(o,a,o.get("formatterParams")||{},s,t.offsetX,t.offsetY,t.position,e)}),n({type:"showTip",from:this.uid})},_showTooltipContent:function(t,e,n,i,r,o,a,s){if(this._ticket="",t.get("showContent")&&t.get("show")){var l=this._tooltipContent,u=t.get("formatter");a=a||t.get("position");var h=e;if(u&&"string"==typeof u)h=Nr(u,n,!0);else if("function"==typeof u){var c=Ob(function(e,i){e===this._ticket&&(l.setContent(i),this._updatePosition(t,a,r,o,l,n,s))},this);this._ticket=i,h=u(n,i,c)}l.setContent(h),l.show(t),this._updatePosition(t,a,r,o,l,n,s)}},_updatePosition:function(t,e,n,i,r,o,a){var s=this._api.getWidth(),l=this._api.getHeight();e=e||t.get("position");var u=r.getSize(),h=t.get("align"),c=t.get("verticalAlign"),d=a&&a.getBoundingRect().clone();if(a&&d.applyTransform(a.transform),"function"==typeof e&&(e=e([n,i],o,r.el,d,{viewSize:[s,l],contentSize:u.slice()})),y(e))n=Eb(e[0],s),i=Eb(e[1],l);else if(w(e)){e.width=u[0],e.height=u[1];var f=Gr(e,{width:s,height:l});n=f.x,i=f.y,h=null,c=null}else"string"==typeof e&&a?(n=(p=$h(e,d,u))[0],i=p[1]):(n=(p=jh(n,i,r.el,s,l,h?null:20,c?null:20))[0],i=p[1]);if(h&&(n-=Kh(h)?u[0]/2:"right"===h?u[0]:0),c&&(i-=Kh(c)?u[1]/2:"bottom"===c?u[1]:0),t.get("confine")){var p=Yh(n,i,r.el,s,l);n=p[0],i=p[1]}r.moveTo(n,i)},_updateContentNotChangedOnAxis:function(t){var e=this._lastDataByCoordSys,n=!!e&&e.length===t.length;return n&&zb(e,function(e,i){var r=e.dataByAxis||{},o=(t[i]||{}).dataByAxis||[];(n&=r.length===o.length)&&zb(r,function(t,e){var i=o[e]||{},r=t.seriesDataIndices||[],a=i.seriesDataIndices||[];(n&=t.value===i.value&&t.axisType===i.axisType&&t.axisId===i.axisId&&r.length===a.length)&&zb(r,function(t,e){var i=a[e];n&=t.seriesIndex===i.seriesIndex&&t.dataIndex===i.dataIndex})})}),this._lastDataByCoordSys=t,!!n},_hide:function(t){this._lastDataByCoordSys=null,t({type:"hideTip",from:this.uid})},dispose:function(t,e){bp.node||bp.wxa||(this._tooltipContent.hide(),Sh("itemTooltip",e))}}),ts({type:"showTip",event:"showTip",update:"tooltip:manuallyShowTip"},function(){}),ts({type:"hideTip",event:"hideTip",update:"tooltip:manuallyHideTip"},function(){});var Rb=os({type:"legend.plain",dependencies:["series"],layoutMode:{type:"box",ignoreSize:!0},init:function(t,e,n){this.mergeDefaultAndTheme(t,n),t.selected=t.selected||{}},mergeOption:function(t){Rb.superCall(this,"mergeOption",t)},optionUpdated:function(){this._updateData(this.ecModel);var t=this._data;if(t[0]&&"single"===this.get("selectedMode")){for(var e=!1,n=0;n=0},defaultOption:{zlevel:0,z:4,show:!0,orient:"horizontal",left:"center",top:0,align:"auto",backgroundColor:"rgba(0,0,0,0)",borderColor:"#ccc",borderRadius:0,borderWidth:0,padding:5,itemGap:10,itemWidth:25,itemHeight:14,inactiveColor:"#ccc",textStyle:{color:"#333"},selectedMode:!0,tooltip:{show:!1}}});ts("legendToggleSelect","legendselectchanged",v(Qh,"toggleSelected")),ts("legendSelect","legendselected",v(Qh,"select")),ts("legendUnSelect","legendunselected",v(Qh,"unSelect"));var Bb=v,Vb=d,Fb=Sg,Hb=as({type:"legend.plain",newlineDisabled:!1,init:function(){this.group.add(this._contentGroup=new Fb),this._backgroundEl},getContentGroup:function(){return this._contentGroup},render:function(t,e,n){if(this.resetInner(),t.get("show",!0)){var i=t.get("align");i&&"auto"!==i||(i="right"===t.get("left")&&"vertical"===t.get("orient")?"right":"left"),this.renderInner(i,t,e,n);var r=t.getBoxLayoutParams(),o={width:n.getWidth(),height:n.getHeight()},s=t.get("padding"),l=Gr(r,o,s),u=this.layoutInner(t,i,l),h=Gr(a({width:u.width,height:u.height},r),o,s);this.group.attr("position",[h.x-u.x,h.y-u.y]),this.group.add(this._backgroundEl=tc(u,t))}},resetInner:function(){this.getContentGroup().removeAll(),this._backgroundEl&&this.group.remove(this._backgroundEl)},renderInner:function(t,e,n,i){var r=this.getContentGroup(),o=N(),a=e.get("selectedMode"),s=[];n.eachRawSeries(function(t){!t.get("legendHoverLink")&&s.push(t.id)}),Vb(e.getData(),function(l,u){var h=l.get("name");if(this.newlineDisabled||""!==h&&"\n"!==h){var c=n.getSeriesByName(h)[0];if(!o.get(h))if(c){var d=c.getData(),f=d.getVisual("color");"function"==typeof f&&(f=f(c.getDataParams(0)));var p=d.getVisual("legendSymbol")||"roundRect",g=d.getVisual("symbol");this._createItem(h,u,l,e,p,g,t,f,a).on("click",Bb(ec,h,i)).on("mouseover",Bb(nc,c,null,i,s)).on("mouseout",Bb(ic,c,null,i,s)),o.set(h,!0)}else n.eachRawSeries(function(n){if(!o.get(h)&&n.legendDataProvider){var r=n.legendDataProvider(),c=r.indexOfName(h);if(c<0)return;var d=r.getItemVisual(c,"color");this._createItem(h,u,l,e,"roundRect",null,t,d,a).on("click",Bb(ec,h,i)).on("mouseover",Bb(nc,n,h,i,s)).on("mouseout",Bb(ic,n,h,i,s)),o.set(h,!0)}},this)}else r.add(new Fb({newline:!0}))},this)},_createItem:function(t,e,n,i,r,a,s,l,u){var h=i.get("itemWidth"),c=i.get("itemHeight"),d=i.get("inactiveColor"),f=i.get("symbolKeepAspect"),p=i.isSelected(t),g=new Fb,m=n.getModel("textStyle"),v=n.get("icon"),y=n.getModel("tooltip"),x=y.parentModel;if(r=v||r,g.add(cl(r,0,0,h,c,p?l:d,null==f||f)),!v&&a&&(a!==r||"none"==a)){var _=.8*c;"none"===a&&(a="circle"),g.add(cl(a,(h-_)/2,(c-_)/2,_,_,p?l:d,null==f||f))}var w="left"===s?h+5:-5,b=s,M=i.get("formatter"),S=t;"string"==typeof M&&M?S=M.replace("{name}",null!=t?t:""):"function"==typeof M&&(S=M(t)),g.add(new kv({style:Ki({},m,{text:S,x:w,y:c/2,textFill:p?m.getTextColor():d,textAlign:b,textVerticalAlign:"middle"})}));var I=new Fv({shape:g.getBoundingRect(),invisible:!0,tooltip:y.get("show")?o({content:t,formatter:x.get("formatter",!0)||function(){return t},formatterParams:{componentType:"legend",legendIndex:i.componentIndex,name:t,$vars:["name"]}},y.option):null});return g.add(I),g.eachChild(function(t){t.silent=!0}),I.silent=!u,this.getContentGroup().add(g),qi(g),g.__legendDataIndex=e,g},layoutInner:function(t,e,n){var i=this.getContentGroup();by(t.get("orient"),i,t.get("itemGap"),n.width,n.height);var r=i.getBoundingRect();return i.attr("position",[-r.x,-r.y]),this.group.getBoundingRect()}});Ja(function(t){var e=t.findComponents({mainType:"legend"});e&&e.length&&t.filterSeries(function(t){for(var n=0;nn[s],f=[-h.x,-h.y];f[a]=i.position[a];var p=[0,0],g=[-c.x,-c.y],m=T(t.get("pageButtonGap",!0),t.get("itemGap",!0));d&&("end"===t.get("pageButtonPosition",!0)?g[a]+=n[s]-c[s]:p[a]+=c[s]+m),g[1-a]+=h[l]/2-c[l]/2,i.attr("position",f),r.attr("position",p),o.attr("position",g);var v=this.group.getBoundingRect();if((v={x:0,y:0})[s]=d?n[s]:h[s],v[l]=Math.max(h[l],c[l]),v[u]=Math.min(0,c[u]+g[1-a]),r.__rectSize=n[s],d){var y={x:0,y:0};y[s]=Math.max(n[s]-c[s]-m,0),y[l]=v[l],r.setClipPath(new Fv({shape:y})),r.__rectSize=y[s]}else o.eachChild(function(t){t.attr({invisible:!0,silent:!0})});var x=this._getPageInfo(t);return null!=x.pageIndex&&ar(i,{position:x.contentPosition},!!d&&t),this._updatePageInfoView(t,x),v},_pageGo:function(t,e,n){var i=this._getPageInfo(e)[t];null!=i&&n.dispatchAction({type:"legendScroll",scrollDataIndex:i,legendId:e.id})},_updatePageInfoView:function(t,e){var n=this._controllerGroup;d(["pagePrev","pageNext"],function(i){var r=null!=e[i+"DataIndex"],o=n.childOfName(i);o&&(o.setStyle("fill",r?t.get("pageIconColor",!0):t.get("pageIconInactiveColor",!0)),o.cursor=r?"pointer":"default")});var i=n.childOfName("pageText"),r=t.get("pageFormatter"),o=e.pageIndex,a=null!=o?o+1:0,s=e.pageCount;i&&r&&i.setStyle("text",_(r)?r.replace("{current}",a).replace("{total}",s):r({current:a,total:s}))},_getPageInfo:function(t){function e(t){var e=t.getBoundingRect().clone();return e[f]+=t.position[h],e}var n,i,r,o,a=t.get("scrollDataIndex",!0),s=this.getContentGroup(),l=s.getBoundingRect(),u=this._containerGroup.__rectSize,h=t.getOrient().index,c=Zb[h],d=Zb[1-h],f=Ub[h],p=s.position.slice();this._showController?s.eachChild(function(t){t.__legendDataIndex===a&&(o=t)}):o=s.childAt(0);var g=u?Math.ceil(l[c]/u):0;if(o){var m=o.getBoundingRect(),v=o.position[h]+m[f];p[h]=-v-l[f],n=Math.floor(g*(v+m[f]+u/2)/l[c]),n=l[c]&&g?Math.max(0,Math.min(g-1,n)):-1;var y={x:0,y:0};y[c]=u,y[d]=l[d],y[f]=-p[h]-l[f];var x,_=s.children();if(s.eachChild(function(t,n){var i=e(t);i.intersect(y)&&(null==x&&(x=n),r=t.__legendDataIndex),n===_.length-1&&i[f]+i[c]<=y[f]+y[c]&&(r=null)}),null!=x){var w=e(_[x]);if(y[f]=w[f]+w[c]-y[c],x<=0&&w[f]>=y[f])i=null;else{for(;x>0&&e(_[x-1]).intersect(y);)x--;i=_[x].__legendDataIndex}}}return{contentPosition:p,pageIndex:n,pageCount:g,pagePrevDataIndex:i,pageNextDataIndex:r}}});ts("legendScroll","legendscroll",function(t,e){var n=t.scrollDataIndex;null!=n&&e.eachComponent({mainType:"legend",subType:"scroll",query:t},function(t){t.setScrollDataIndex(n)})}),os({type:"title",layoutMode:{type:"box",ignoreSize:!0},defaultOption:{zlevel:0,z:6,show:!0,text:"",target:"blank",subtext:"",subtarget:"blank",left:0,top:0,backgroundColor:"rgba(0,0,0,0)",borderColor:"#ccc",borderWidth:0,padding:5,itemGap:10,textStyle:{fontSize:18,fontWeight:"bolder",color:"#333"},subtextStyle:{color:"#aaa"}}}),as({type:"title",render:function(t,e,n){if(this.group.removeAll(),t.get("show")){var i=this.group,r=t.getModel("textStyle"),o=t.getModel("subtextStyle"),a=t.get("textAlign"),s=t.get("textBaseline"),l=new kv({style:Ki({},r,{text:t.get("text"),textFill:r.getTextColor()},{disableBox:!0}),z2:10}),u=l.getBoundingRect(),h=t.get("subtext"),c=new kv({style:Ki({},o,{text:h,textFill:o.getTextColor(),y:u.height+t.get("itemGap"),textVerticalAlign:"top"},{disableBox:!0}),z2:10}),d=t.get("link"),f=t.get("sublink");l.silent=!d,c.silent=!f,d&&l.on("click",function(){window.open(d,"_"+t.get("target"))}),f&&c.on("click",function(){window.open(f,"_"+t.get("subtarget"))}),i.add(l),h&&i.add(c);var p=i.getBoundingRect(),g=t.getBoxLayoutParams();g.width=p.width,g.height=p.height;var m=Gr(g,{width:n.getWidth(),height:n.getHeight()},t.get("padding"));a||("middle"===(a=t.get("left")||t.get("right"))&&(a="center"),"right"===a?m.x+=m.width:"center"===a&&(m.x+=m.width/2)),s||("center"===(s=t.get("top")||t.get("bottom"))&&(s="middle"),"bottom"===s?m.y+=m.height:"middle"===s&&(m.y+=m.height/2),s=s||"top"),i.attr("position",[m.x,m.y]);var v={textAlign:a,textVerticalAlign:s};l.setStyle(v),c.setStyle(v),p=i.getBoundingRect();var y=m.margin,x=t.getItemStyle(["color","opacity"]);x.fill=t.get("backgroundColor");var _=new Fv({shape:{x:p.x-y[3],y:p.y-y[0],width:p.width+y[1]+y[3],height:p.height+y[0]+y[2],r:t.get("borderRadius")},style:x,silent:!0});Ei(_),i.add(_)}}});var jb=Or,Yb=Er,qb=os({type:"marker",dependencies:["series","grid","polar","geo"],init:function(t,e,n,i){this.mergeDefaultAndTheme(t,n),this.mergeOption(t,n,i.createdBySelf,!0)},isAnimationEnabled:function(){if(bp.node)return!1;var t=this.__hostSeries;return this.getShallow("animation")&&t&&t.isAnimationEnabled()},mergeOption:function(t,e,n,i){var r=this.constructor,a=this.mainType+"Model";n||e.eachSeries(function(t){var n=t.get(this.mainType,!0),s=t[a];n&&n.data?(s?s.mergeOption(n,e,!0):(i&&oc(n),d(n.data,function(t){t instanceof Array?(oc(t[0]),oc(t[1])):oc(t)}),o(s=new r(n,this,e),{mainType:this.mainType,seriesIndex:t.seriesIndex,name:t.name,createdBySelf:!0}),s.__hostSeries=t),t[a]=s):t[a]=null},this)},formatTooltip:function(t){var e=this.getData(),n=this.getRawValue(t),i=y(n)?f(n,jb).join(", "):jb(n),r=e.getName(t),o=Yb(this.name);return(null!=n||r)&&(o+="
"),r&&(o+=Yb(r),null!=n&&(o+=" : ")),null!=n&&(o+=Yb(i)),o},getData:function(){return this._data},setData:function(t){this._data=t}});h(qb,sx),qb.extend({type:"markPoint",defaultOption:{zlevel:0,z:5,symbol:"pin",symbolSize:50,tooltip:{trigger:"item"},label:{show:!0,position:"inside"},itemStyle:{borderWidth:2},emphasis:{label:{show:!0}}}});var $b=l,Kb=v,Qb={min:Kb(lc,"min"),max:Kb(lc,"max"),average:Kb(lc,"average")},Jb=as({type:"marker",init:function(){this.markerGroupMap=N()},render:function(t,e,n){var i=this.markerGroupMap;i.each(function(t){t.__keep=!1});var r=this.type+"Model";e.eachSeries(function(t){var i=t[r];i&&this.renderSeries(t,i,e,n)},this),i.each(function(t){!t.__keep&&this.group.remove(t.group)},this)},renderSeries:function(){}});Jb.extend({type:"markPoint",updateTransform:function(t,e,n){e.eachSeries(function(t){var e=t.markPointModel;e&&(gc(e.getData(),t,n),this.markerGroupMap.get(t.id).updateLayout(e))},this)},renderSeries:function(t,e,n,i){var r=t.coordinateSystem,o=t.id,a=t.getData(),s=this.markerGroupMap,l=s.get(o)||s.set(o,new Bl),u=mc(r,t,e);e.setData(u),gc(e.getData(),t,i),u.each(function(t){var n=u.getItemModel(t),i=n.getShallow("symbolSize");"function"==typeof i&&(i=i(e.getRawValue(t),e.getDataParams(t))),u.setItemVisual(t,{symbolSize:i,color:n.get("itemStyle.color")||a.getVisual("color"),symbol:n.getShallow("symbol")})}),l.updateData(u),this.group.add(l.group),u.eachItemGraphicEl(function(t){t.traverse(function(t){t.dataModel=e})}),l.__keep=!0,l.group.silent=e.get("silent")||t.get("silent")}}),Qa(function(t){t.markPoint=t.markPoint||{}}),qb.extend({type:"markLine",defaultOption:{zlevel:0,z:5,symbol:["circle","arrow"],symbolSize:[8,16],precision:2,tooltip:{trigger:"item"},label:{show:!0,position:"end"},lineStyle:{type:"dashed"},emphasis:{label:{show:!0},lineStyle:{width:3}},animationEasing:"linear"}});var tM=Hv.prototype,eM=Wv.prototype,nM=Ai({type:"ec-line",style:{stroke:"#000",fill:null},shape:{x1:0,y1:0,x2:0,y2:0,percent:1,cpx1:null,cpy1:null},buildPath:function(t,e){(vc(e)?tM:eM).buildPath(t,e)},pointAt:function(t){return vc(this.shape)?tM.pointAt.call(this,t):eM.pointAt.call(this,t)},tangentAt:function(t){var e=this.shape,n=vc(e)?[e.x2-e.x1,e.y2-e.y1]:eM.tangentAt.call(this,t);return j(n,n)}}),iM=["fromSymbol","toSymbol"],rM=bc.prototype;rM.beforeUpdate=function(){var t=this,e=t.childOfName("fromSymbol"),n=t.childOfName("toSymbol"),i=t.childOfName("label");if(e||n||!i.ignore){for(var r=1,o=this.parent;o;)o.scale&&(r/=o.scale[0]),o=o.parent;var a=t.childOfName("line");if(this.__dirty||a.__dirty){var s=a.shape.percent,l=a.pointAt(0),u=a.pointAt(s),h=W([],u,l);if(j(h,h),e&&(e.attr("position",l),c=a.tangentAt(0),e.attr("rotation",Math.PI/2-Math.atan2(c[1],c[0])),e.attr("scale",[r*s,r*s])),n){n.attr("position",u);var c=a.tangentAt(1);n.attr("rotation",-Math.PI/2-Math.atan2(c[1],c[0])),n.attr("scale",[r*s,r*s])}if(!i.ignore){i.attr("position",u);var d,f,p,g=5*r;if("end"===i.__position)d=[h[0]*g+u[0],h[1]*g+u[1]],f=h[0]>.8?"left":h[0]<-.8?"right":"center",p=h[1]>.8?"top":h[1]<-.8?"bottom":"middle";else if("middle"===i.__position){var m=s/2,v=[(c=a.tangentAt(m))[1],-c[0]],y=a.pointAt(m);v[1]>0&&(v[0]=-v[0],v[1]=-v[1]),d=[y[0]+v[0]*g,y[1]+v[1]*g],f="center",p="bottom";var x=-Math.atan2(c[1],c[0]);u[0].8?"right":h[0]<-.8?"left":"center",p=h[1]>.8?"bottom":h[1]<-.8?"top":"middle";i.attr({style:{textVerticalAlign:i.__verticalAlign||p,textAlign:i.__textAlign||f},position:d,scale:[r,r]})}}}},rM._createLine=function(t,e,n){var i=t.hostModel,r=_c(t.getItemLayout(e));r.shape.percent=0,sr(r,{shape:{percent:1}},i,e),this.add(r);var o=new kv({name:"label"});this.add(o),d(iM,function(n){var i=xc(n,t,e);this.add(i),this[yc(n)]=t.getItemVisual(e,n)},this),this._updateCommonStl(t,e,n)},rM.updateData=function(t,e,n){var i=t.hostModel,r=this.childOfName("line"),o=t.getItemLayout(e),a={shape:{}};wc(a.shape,o),ar(r,a,i,e),d(iM,function(n){var i=t.getItemVisual(e,n),r=yc(n);if(this[r]!==i){this.remove(this.childOfName(n));var o=xc(n,t,e);this.add(o)}this[r]=i},this),this._updateCommonStl(t,e,n)},rM._updateCommonStl=function(t,e,n){var i=t.hostModel,r=this.childOfName("line"),o=n&&n.lineStyle,s=n&&n.hoverLineStyle,l=n&&n.labelModel,u=n&&n.hoverLabelModel;if(!n||t.hasItemOption){var h=t.getItemModel(e);o=h.getModel("lineStyle").getLineStyle(),s=h.getModel("emphasis.lineStyle").getLineStyle(),l=h.getModel("label"),u=h.getModel("emphasis.label")}var c=t.getItemVisual(e,"color"),f=D(t.getItemVisual(e,"opacity"),o.opacity,1);r.useStyle(a({strokeNoScale:!0,fill:"none",stroke:c,opacity:f},o)),r.hoverStyle=s,d(iM,function(t){var e=this.childOfName(t);e&&(e.setColor(c),e.setStyle({opacity:f}))},this);var p,g,m=l.getShallow("show"),v=u.getShallow("show"),y=this.childOfName("label");if((m||v)&&(p=c||"#000",null==(g=i.getFormattedLabel(e,"normal",t.dataType)))){var x=i.getRawValue(e);g=null==x?t.getName(e):isFinite(x)?wr(x):x}var _=m?g:null,w=v?T(i.getFormattedLabel(e,"emphasis",t.dataType),g):null,b=y.style;null==_&&null==w||(Ki(y.style,l,{text:_},{autoColor:p}),y.__textAlign=b.textAlign,y.__verticalAlign=b.textVerticalAlign,y.__position=l.get("position")||"middle"),y.hoverStyle=null!=w?{text:w,textFill:u.getTextColor(!0),fontStyle:u.getShallow("fontStyle"),fontWeight:u.getShallow("fontWeight"),fontSize:u.getShallow("fontSize"),fontFamily:u.getShallow("fontFamily")}:{text:null},y.ignore=!m&&!v,qi(this)},rM.highlight=function(){this.trigger("emphasis")},rM.downplay=function(){this.trigger("normal")},rM.updateLayout=function(t,e){this.setLinePoints(t.getItemLayout(e))},rM.setLinePoints=function(t){var e=this.childOfName("line");wc(e.shape,t),e.dirty()},u(bc,Sg);var oM=Mc.prototype;oM.isPersistent=function(){return!0},oM.updateData=function(t){var e=this,n=e.group,i=e._lineData;e._lineData=t,i||n.removeAll();var r=Cc(t);t.diff(i).add(function(n){Sc(e,t,n,r)}).update(function(n,o){Ic(e,i,t,o,n,r)}).remove(function(t){n.remove(i.getItemGraphicEl(t))}).execute()},oM.updateLayout=function(){var t=this._lineData;t&&t.eachItemGraphicEl(function(e,n){e.updateLayout(t,n)},this)},oM.incrementalPrepareUpdate=function(t){this._seriesScope=Cc(t),this._lineData=null,this.group.removeAll()},oM.incrementalUpdate=function(t,e){for(var n=t.start;n=0&&"number"==typeof h&&(h=+h.toFixed(Math.min(m,20))),p.coord[d]=g.coord[d]=h,a=[p,g,{type:l,valueIndex:a.valueIndex,value:h}]}return a=[uc(t,a[0]),uc(t,a[1]),o({},a[2])],a[2].type=a[2].type||"",i(a[2],a[0]),i(a[2],a[1]),a};Jb.extend({type:"markLine",updateTransform:function(t,e,n){e.eachSeries(function(t){var e=t.markLineModel;if(e){var i=e.getData(),r=e.__from,o=e.__to;r.each(function(e){Lc(r,e,!0,t,n),Lc(o,e,!1,t,n)}),i.each(function(t){i.setItemLayout(t,[r.getItemLayout(t),o.getItemLayout(t)])}),this.markerGroupMap.get(t.id).updateLayout()}},this)},renderSeries:function(t,e,n,i){function r(e,n,r){var o=e.getItemModel(n);Lc(e,n,r,t,i),e.setItemVisual(n,{symbolSize:o.get("symbolSize")||g[r?0:1],symbol:o.get("symbol",!0)||p[r?0:1],color:o.get("itemStyle.color")||s.getVisual("color")})}var o=t.coordinateSystem,a=t.id,s=t.getData(),l=this.markerGroupMap,u=l.get(a)||l.set(a,new Mc);this.group.add(u.group);var h=Oc(o,t,e),c=h.from,d=h.to,f=h.line;e.__from=c,e.__to=d,e.setData(f);var p=e.get("symbol"),g=e.get("symbolSize");y(p)||(p=[p,p]),"number"==typeof g&&(g=[g,g]),h.from.each(function(t){r(c,t,!0),r(d,t,!1)}),f.each(function(t){var e=f.getItemModel(t).get("lineStyle.color");f.setItemVisual(t,{color:e||c.getItemVisual(t,"color")}),f.setItemLayout(t,[c.getItemLayout(t),d.getItemLayout(t)]),f.setItemVisual(t,{fromSymbolSize:c.getItemVisual(t,"symbolSize"),fromSymbol:c.getItemVisual(t,"symbol"),toSymbolSize:d.getItemVisual(t,"symbolSize"),toSymbol:d.getItemVisual(t,"symbol")})}),u.updateData(f),h.line.eachItemGraphicEl(function(t,n){t.traverse(function(t){t.dataModel=e})}),u.__keep=!0,u.group.silent=e.get("silent")||t.get("silent")}}),Qa(function(t){t.markLine=t.markLine||{}}),qb.extend({type:"markArea",defaultOption:{zlevel:0,z:1,tooltip:{trigger:"item"},animation:!1,label:{show:!0,position:"top"},itemStyle:{borderWidth:0},emphasis:{label:{show:!0,position:"top"}}}});var sM=function(t,e,n,i){var o=uc(t,i[0]),a=uc(t,i[1]),s=C,l=o.coord,u=a.coord;l[0]=s(l[0],-1/0),l[1]=s(l[1],-1/0),u[0]=s(u[0],1/0),u[1]=s(u[1],1/0);var h=r([{},o,a]);return h.coord=[o.coord,a.coord],h.x0=o.x,h.y0=o.y,h.x1=a.x,h.y1=a.y,h},lM=[["x0","y0"],["x1","y0"],["x1","y1"],["x0","y1"]];Jb.extend({type:"markArea",updateTransform:function(t,e,n){e.eachSeries(function(t){var e=t.markAreaModel;if(e){var i=e.getData();i.each(function(e){var r=f(lM,function(r){return Rc(i,e,r,t,n)});i.setItemLayout(e,r),i.getItemGraphicEl(e).setShape("points",r)})}},this)},renderSeries:function(t,e,n,i){var r=t.coordinateSystem,o=t.id,s=t.getData(),l=this.markerGroupMap,u=l.get(o)||l.set(o,{group:new Sg});this.group.add(u.group),u.__keep=!0;var h=Bc(r,t,e);e.setData(h),h.each(function(e){h.setItemLayout(e,f(lM,function(n){return Rc(h,e,n,t,i)})),h.setItemVisual(e,{color:s.getVisual("color")})}),h.diff(u.__data).add(function(t){var e=new Bv({shape:{points:h.getItemLayout(t)}});h.setItemGraphicEl(t,e),u.group.add(e)}).update(function(t,n){var i=u.__data.getItemGraphicEl(n);ar(i,{shape:{points:h.getItemLayout(t)}},e,t),u.group.add(i),h.setItemGraphicEl(t,i)}).remove(function(t){var e=u.__data.getItemGraphicEl(t);u.group.remove(e)}).execute(),h.eachItemGraphicEl(function(t,n){var i=h.getItemModel(n),r=i.getModel("label"),o=i.getModel("emphasis.label"),s=h.getItemVisual(n,"color");t.useStyle(a(i.getModel("itemStyle").getItemStyle(),{fill:Pt(s,.4),stroke:s})),t.hoverStyle=i.getModel("emphasis.itemStyle").getItemStyle(),$i(t.style,t.hoverStyle,r,o,{labelFetcher:e,labelDataIndex:n,defaultText:h.getName(n)||"",isRectText:!0,autoColor:s}),qi(t,{}),t.dataModel=e}),u.__data=h,u.group.silent=e.get("silent")||t.get("silent")}}),Qa(function(t){t.markArea=t.markArea||{}}),Iy.registerSubTypeDefaulter("dataZoom",function(){return"slider"});var uM=["cartesian2d","polar","singleAxis"],hM=function(t,e){var n=f(t=t.slice(),Fr),i=f(e=(e||[]).slice(),Fr);return function(r,o){d(t,function(t,a){for(var s={name:t,capital:n[a]},l=0;l=a[0]&&t<=a[1]}if(t===this._dataZoomModel){var i=this._dimName,r=this.getTargetSeriesModels(),o=t.get("filterMode"),a=this._valueWindow;"none"!==o&&cM(r,function(t){var e=t.getData(),r=e.mapDimension(i,!0);"weakFilter"===o?e.filterSelf(function(t){for(var n,i,o,s=0;sa[1];if(u&&!h&&!c)return!0;u&&(o=!0),h&&(n=!0),c&&(i=!0)}return o&&n&&i}):cM(r,function(i){if("empty"===o)t.setData(e.map(i,function(t){return n(t)?t:NaN}));else{var r={};r[i]=a,e.selectRange(r)}}),cM(r,function(t){e.setApproximateExtent(a,t)})})}}};var pM=d,gM=hM,mM=os({type:"dataZoom",dependencies:["xAxis","yAxis","zAxis","radiusAxis","angleAxis","singleAxis","series"],defaultOption:{zlevel:0,z:4,orient:null,xAxisIndex:null,yAxisIndex:null,filterMode:"filter",throttle:null,start:0,end:100,startValue:null,endValue:null,minSpan:null,maxSpan:null,minValueSpan:null,maxValueSpan:null,rangeMode:null},init:function(t,e,n){this._dataIntervalByAxis={},this._dataInfo={},this._axisProxies={},this.textStyleModel,this._autoThrottle=!0,this._rangePropMode=["percent","percent"];var i=Uc(t);this.mergeDefaultAndTheme(t,n),this.doInit(i)},mergeOption:function(t){var e=Uc(t);i(this.option,t,!0),this.doInit(e)},doInit:function(t){var e=this.option;bp.canvasSupported||(e.realtime=!1),this._setDefaultThrottle(t),Xc(this,t),pM([["start","startValue"],["end","endValue"]],function(t,n){"value"===this._rangePropMode[n]&&(e[t[0]]=null)},this),this.textStyleModel=this.getModel("textStyle"),this._resetTarget(),this._giveAxisProxies()},_giveAxisProxies:function(){var t=this._axisProxies;this.eachTargetAxis(function(e,n,i,r){var o=this.dependentModels[e.axis][n],a=o.__dzAxisProxy||(o.__dzAxisProxy=new fM(e.name,n,this,r));t[e.name+"_"+n]=a},this)},_resetTarget:function(){var t=this.option,e=this._judgeAutoMode();gM(function(e){var n=e.axisIndex;t[n]=xn(t[n])},this),"axisIndex"===e?this._autoSetAxisIndex():"orient"===e&&this._autoSetOrient()},_judgeAutoMode:function(){var t=this.option,e=!1;gM(function(n){null!=t[n.axisIndex]&&(e=!0)},this);var n=t.orient;return null==n&&e?"orient":e?void 0:(null==n&&(t.orient="horizontal"),"axisIndex")},_autoSetAxisIndex:function(){var t=!0,e=this.get("orient",!0),n=this.option,i=this.dependentModels;if(t){var r="vertical"===e?"y":"x";i[r+"Axis"].length?(n[r+"AxisIndex"]=[0],t=!1):pM(i.singleAxis,function(i){t&&i.get("orient",!0)===e&&(n.singleAxisIndex=[i.componentIndex],t=!1)})}t&&gM(function(e){if(t){var i=[],r=this.dependentModels[e.axis];if(r.length&&!i.length)for(var o=0,a=r.length;o0?100:20}},getFirstTargetAxisModel:function(){var t;return gM(function(e){if(null==t){var n=this.get(e.axisIndex);n.length&&(t=this.dependentModels[e.axis][n[0]])}},this),t},eachTargetAxis:function(t,e){var n=this.ecModel;gM(function(i){pM(this.get(i.axisIndex),function(r){t.call(e,i,r,this,n)},this)},this)},getAxisProxy:function(t,e){return this._axisProxies[t+"_"+e]},getAxisModel:function(t,e){var n=this.getAxisProxy(t,e);return n&&n.getAxisModel()},setRawRange:function(t,e){var n=this.option;pM([["start","startValue"],["end","endValue"]],function(e){null==t[e[0]]&&null==t[e[1]]||(n[e[0]]=t[e[0]],n[e[1]]=t[e[1]])},this),!e&&Xc(this,t)},getPercentRange:function(){var t=this.findRepresentativeAxisProxy();if(t)return t.getDataPercentWindow()},getValueRange:function(t,e){if(null!=t||null!=e)return this.getAxisProxy(t,e).getDataValueWindow();var n=this.findRepresentativeAxisProxy();return n?n.getDataValueWindow():void 0},findRepresentativeAxisProxy:function(t){if(t)return t.__dzAxisProxy;var e=this._axisProxies;for(var n in e)if(e.hasOwnProperty(n)&&e[n].hostedBy(this))return e[n];for(var n in e)if(e.hasOwnProperty(n)&&!e[n].hostedBy(this))return e[n]},getRangePropMode:function(){return this._rangePropMode.slice()}}),vM=dx.extend({type:"dataZoom",render:function(t,e,n,i){this.dataZoomModel=t,this.ecModel=e,this.api=n},getTargetCoordInfo:function(){function t(t,e,n,i){for(var r,o=0;oo&&(e[1-i]=e[i]+h.sign*o),e}),xM=Fv,_M=xr,wM=br,bM=m,MM=d,SM="horizontal",IM=5,CM=["line","bar","candlestick","scatter"],TM=vM.extend({type:"dataZoom.slider",init:function(t,e){this._displayables={},this._orient,this._range,this._handleEnds,this._size,this._handleWidth,this._handleHeight,this._location,this._dragging,this._dataShadowInfo,this.api=e},render:function(t,e,n,i){TM.superApply(this,"render",arguments),ha(this,"_dispatchZoomAction",this.dataZoomModel.get("throttle"),"fixRate"),this._orient=t.get("orient"),!1!==this.dataZoomModel.get("show")?(i&&"dataZoom"===i.type&&i.from===this.uid||this._buildView(),this._updateView()):this.group.removeAll()},remove:function(){TM.superApply(this,"remove",arguments),ca(this,"_dispatchZoomAction")},dispose:function(){TM.superApply(this,"dispose",arguments),ca(this,"_dispatchZoomAction")},_buildView:function(){var t=this.group;t.removeAll(),this._resetLocation(),this._resetInterval();var e=this._displayables.barGroup=new Sg;this._renderBackground(),this._renderHandle(),this._renderDataShadow(),t.add(e),this._positionGroup()},_resetLocation:function(){var t=this.dataZoomModel,e=this.api,n=this._findCoordRect(),i={width:e.getWidth(),height:e.getHeight()},r=this._orient===SM?{right:i.width-n.x-n.width,top:i.height-30-7,width:n.width,height:30}:{right:7,top:n.y,width:30,height:n.height},o=Ur(t.option);d(["right","top","width","height"],function(t){"ph"===o[t]&&(o[t]=r[t])});var a=Gr(o,i,t.padding);this._location={x:a.x,y:a.y},this._size=[a.width,a.height],"vertical"===this._orient&&this._size.reverse()},_positionGroup:function(){var t=this.group,e=this._location,n=this._orient,i=this.dataZoomModel.getFirstTargetAxisModel(),r=i&&i.get("inverse"),o=this._displayables.barGroup,a=(this._dataShadowInfo||{}).otherAxisInverse;o.attr(n!==SM||r?n===SM&&r?{scale:a?[-1,1]:[-1,-1]}:"vertical"!==n||r?{scale:a?[-1,-1]:[-1,1],rotation:Math.PI/2}:{scale:a?[1,-1]:[1,1],rotation:Math.PI/2}:{scale:a?[1,1]:[1,-1]});var s=t.getBoundingRect([o]);t.attr("position",[e.x-s.x,e.y-s.y])},_getViewExtent:function(){return[0,this._size[0]]},_renderBackground:function(){var t=this.dataZoomModel,e=this._size,n=this._displayables.barGroup;n.add(new xM({silent:!0,shape:{x:0,y:0,width:e[0],height:e[1]},style:{fill:t.get("backgroundColor")},z2:-40})),n.add(new xM({shape:{x:0,y:0,width:e[0],height:e[1]},style:{fill:"transparent"},z2:0,onclick:m(this._onClickPanelClick,this)}))},_renderDataShadow:function(){var t=this._dataShadowInfo=this._prepareDataShadowInfo();if(t){var e=this._size,n=t.series,i=n.getRawData(),r=n.getShadowDim?n.getShadowDim():t.otherDim;if(null!=r){var o=i.getDataExtent(r),s=.3*(o[1]-o[0]);o=[o[0]-s,o[1]+s];var l,u=[0,e[1]],h=[0,e[0]],c=[[e[0],0],[0,0]],d=[],f=h[1]/(i.count()-1),p=0,g=Math.round(i.count()/e[0]);i.each([r],function(t,e){if(g>0&&e%g)p+=f;else{var n=null==t||isNaN(t)||""===t,i=n?0:_M(t,o,u,!0);n&&!l&&e?(c.push([c[c.length-1][0],0]),d.push([d[d.length-1][0],0])):!n&&l&&(c.push([p,0]),d.push([p,0])),c.push([p,i]),d.push([p,i]),p+=f,l=n}});var m=this.dataZoomModel;this._displayables.barGroup.add(new Bv({shape:{points:c},style:a({fill:m.get("dataBackgroundColor")},m.getModel("dataBackground.areaStyle").getAreaStyle()),silent:!0,z2:-20})),this._displayables.barGroup.add(new Vv({shape:{points:d},style:m.getModel("dataBackground.lineStyle").getLineStyle(),silent:!0,z2:-19}))}}},_prepareDataShadowInfo:function(){var t=this.dataZoomModel,e=t.get("showDataShadow");if(!1!==e){var n,i=this.ecModel;return t.eachTargetAxis(function(r,o){d(t.getAxisProxy(r.name,o).getTargetSeriesModels(),function(t){if(!(n||!0!==e&&l(CM,t.get("type"))<0)){var a,s=i.getComponent(r.axis,o).axis,u=qc(r.name),h=t.coordinateSystem;null!=u&&h.getOtherAxis&&(a=h.getOtherAxis(s).inverse),u=t.getData().mapDimension(u),n={thisAxis:s,series:t,thisDim:r.name,otherDim:u,otherAxisInverse:a}}},this)},this),n}},_renderHandle:function(){var t=this._displayables,e=t.handles=[],n=t.handleLabels=[],i=this._displayables.barGroup,r=this._size,o=this.dataZoomModel;i.add(t.filler=new xM({draggable:!0,cursor:$c(this._orient),drift:bM(this._onDragMove,this,"all"),onmousemove:function(t){tm(t.event)},ondragstart:bM(this._showDataInfo,this,!0),ondragend:bM(this._onDragEnd,this),onmouseover:bM(this._showDataInfo,this,!0),onmouseout:bM(this._showDataInfo,this,!1),style:{fill:o.get("fillerColor"),textPosition:"inside"}})),i.add(new xM(Ei({silent:!0,shape:{x:0,y:0,width:r[0],height:r[1]},style:{stroke:o.get("dataBackgroundColor")||o.get("borderColor"),lineWidth:1,fill:"rgba(0,0,0,0)"}}))),MM([0,1],function(t){var r=fr(o.get("handleIcon"),{cursor:$c(this._orient),draggable:!0,drift:bM(this._onDragMove,this,t),onmousemove:function(t){tm(t.event)},ondragend:bM(this._onDragEnd,this),onmouseover:bM(this._showDataInfo,this,!0),onmouseout:bM(this._showDataInfo,this,!1)},{x:-1,y:0,width:2,height:2}),a=r.getBoundingRect();this._handleHeight=_r(o.get("handleSize"),this._size[1]),this._handleWidth=a.width/a.height*this._handleHeight,r.setStyle(o.getModel("handleStyle").getItemStyle());var s=o.get("handleColor");null!=s&&(r.style.fill=s),i.add(e[t]=r);var l=o.textStyleModel;this.group.add(n[t]=new kv({silent:!0,invisible:!0,style:{x:0,y:0,text:"",textVerticalAlign:"middle",textAlign:"center",textFill:l.getTextColor(),textFont:l.getFont()},z2:10}))},this)},_resetInterval:function(){var t=this._range=this.dataZoomModel.getPercentRange(),e=this._getViewExtent();this._handleEnds=[_M(t[0],[0,100],e,!0),_M(t[1],[0,100],e,!0)]},_updateInterval:function(t,e){var n=this.dataZoomModel,i=this._handleEnds,r=this._getViewExtent(),o=n.findRepresentativeAxisProxy().getMinMaxSpan(),a=[0,100];yM(e,i,r,n.get("zoomLock")?"all":t,null!=o.minSpan?_M(o.minSpan,a,r,!0):null,null!=o.maxSpan?_M(o.maxSpan,a,r,!0):null);var s=this._range,l=this._range=wM([_M(i[0],r,a,!0),_M(i[1],r,a,!0)]);return!s||s[0]!==l[0]||s[1]!==l[1]},_updateView:function(t){var e=this._displayables,n=this._handleEnds,i=wM(n.slice()),r=this._size;MM([0,1],function(t){var i=e.handles[t],o=this._handleHeight;i.attr({scale:[o/2,o/2],position:[n[t],r[1]/2-o/2]})},this),e.filler.setShape({x:i[0],y:0,width:i[1]-i[0],height:r[1]}),this._updateDataInfo(t)},_updateDataInfo:function(t){function e(t){var e=lr(i.handles[t].parent,this.group),n=hr(0===t?"right":"left",e),s=this._handleWidth/2+IM,l=ur([c[t]+(0===t?-s:s),this._size[1]/2],e);r[t].setStyle({x:l[0],y:l[1],textVerticalAlign:o===SM?"middle":n,textAlign:o===SM?n:"center",text:a[t]})}var n=this.dataZoomModel,i=this._displayables,r=i.handleLabels,o=this._orient,a=["",""];if(n.get("showDetail")){var s=n.findRepresentativeAxisProxy();if(s){var l=s.getAxisModel().axis,u=this._range,h=t?s.calculateDataWindow({start:u[0],end:u[1]}).valueWindow:s.getDataValueWindow();a=[this._formatLabel(h[0],l),this._formatLabel(h[1],l)]}}var c=wM(this._handleEnds.slice());e.call(this,0),e.call(this,1)},_formatLabel:function(t,e){var n=this.dataZoomModel,i=n.get("labelFormatter"),r=n.get("labelPrecision");null!=r&&"auto"!==r||(r=e.getPixelPrecision());var o=null==t||isNaN(t)?"":"category"===e.type||"time"===e.type?e.scale.getLabel(Math.round(t)):t.toFixed(Math.min(r,20));return x(i)?i(t,o):_(i)?i.replace("{value}",o):o},_showDataInfo:function(t){t=this._dragging||t;var e=this._displayables.handleLabels;e[0].attr("invisible",!t),e[1].attr("invisible",!t)},_onDragMove:function(t,e,n){this._dragging=!0;var i=ur([e,n],this._displayables.barGroup.getLocalTransform(),!0),r=this._updateInterval(t,i[0]),o=this.dataZoomModel.get("realtime");this._updateView(!o),r&&o&&this._dispatchZoomAction()},_onDragEnd:function(){this._dragging=!1,this._showDataInfo(!1),!this.dataZoomModel.get("realtime")&&this._dispatchZoomAction()},_onClickPanelClick:function(t){var e=this._size,n=this._displayables.barGroup.transformCoordToLocal(t.offsetX,t.offsetY);if(!(n[0]<0||n[0]>e[0]||n[1]<0||n[1]>e[1])){var i=this._handleEnds,r=(i[0]+i[1])/2,o=this._updateInterval("all",n[0]-r);this._updateView(),o&&this._dispatchZoomAction()}},_dispatchZoomAction:function(){var t=this._range;this.api.dispatchAction({type:"dataZoom",from:this.uid,dataZoomId:this.dataZoomModel.id,start:t[0],end:t[1]})},_findCoordRect:function(){var t;if(MM(this.getTargetCoordInfo(),function(e){if(!t&&e.length){var n=e[0].model.coordinateSystem;t=n.getRect&&n.getRect()}}),!t){var e=this.api.getWidth(),n=this.api.getHeight();t={x:.2*e,y:.2*n,width:.6*e,height:.6*n}}return t}});mM.extend({type:"dataZoom.inside",defaultOption:{disabled:!1,zoomLock:!1,zoomOnMouseWheel:!0,moveOnMouseMove:!0,preventDefaultMouseMove:!0}});var DM="\0_ec_interaction_mutex";ts({type:"takeGlobalCursor",event:"globalCursorTaken",update:"update"},function(){}),h(ed,Zp);var AM=v,kM="\0_ec_dataZoom_roams",PM=m,LM=vM.extend({type:"dataZoom.inside",init:function(t,e){this._range},render:function(t,e,n,i){LM.superApply(this,"render",arguments),this._range=t.getPercentRange(),d(this.getTargetCoordInfo(),function(e,i){var r=f(e,function(t){return cd(t.model)});d(e,function(e){var o=e.model,a=t.option;ud(n,{coordId:cd(o),allCoordIds:r,containsPoint:function(t,e,n){return o.coordinateSystem.containPoint([e,n])},dataZoomId:t.id,throttleRate:t.get("throttle",!0),panGetRange:PM(this._onPan,this,e,i),zoomGetRange:PM(this._onZoom,this,e,i),zoomLock:a.zoomLock,disabled:a.disabled,roamControllerOpt:{zoomOnMouseWheel:a.zoomOnMouseWheel,moveOnMouseMove:a.moveOnMouseMove,preventDefaultMouseMove:a.preventDefaultMouseMove}})},this)},this)},dispose:function(){hd(this.api,this.dataZoomModel.id),LM.superApply(this,"dispose",arguments),this._range=null},_onPan:function(t,e,n,i,r,o,a,s,l){var u=this._range,h=u.slice(),c=t.axisModels[0];if(c){var d=OM[e]([o,a],[s,l],c,n,t),f=d.signal*(h[1]-h[0])*d.pixel/d.pixelLength;return yM(f,h,[0,100],"all"),this._range=h,u[0]!==h[0]||u[1]!==h[1]?h:void 0}},_onZoom:function(t,e,n,i,r,o){var a=this._range,s=a.slice(),l=t.axisModels[0];if(l){var u=OM[e](null,[r,o],l,n,t),h=(u.signal>0?u.pixelStart+u.pixelLength-u.pixel:u.pixel-u.pixelStart)/u.pixelLength*(s[1]-s[0])+s[0];i=Math.max(1/i,0),s[0]=(s[0]-h)*i+h,s[1]=(s[1]-h)*i+h;var c=this.dataZoomModel.findRepresentativeAxisProxy().getMinMaxSpan();return yM(0,s,[0,100],0,c.minSpan,c.maxSpan),this._range=s,a[0]!==s[0]||a[1]!==s[1]?s:void 0}}}),OM={grid:function(t,e,n,i,r){var o=n.axis,a={},s=r.model.coordinateSystem.getRect();return t=t||[0,0],"x"===o.dim?(a.pixel=e[0]-t[0],a.pixelLength=s.width,a.pixelStart=s.x,a.signal=o.inverse?1:-1):(a.pixel=e[1]-t[1],a.pixelLength=s.height,a.pixelStart=s.y,a.signal=o.inverse?-1:1),a},polar:function(t,e,n,i,r){var o=n.axis,a={},s=r.model.coordinateSystem,l=s.getRadiusAxis().getExtent(),u=s.getAngleAxis().getExtent();return t=t?s.pointToCoord(t):[0,0],e=s.pointToCoord(e),"radiusAxis"===n.mainType?(a.pixel=e[0]-t[0],a.pixelLength=l[1]-l[0],a.pixelStart=l[0],a.signal=o.inverse?1:-1):(a.pixel=e[1]-t[1],a.pixelLength=u[1]-u[0],a.pixelStart=u[0],a.signal=o.inverse?-1:1),a},singleAxis:function(t,e,n,i,r){var o=n.axis,a=r.model.coordinateSystem.getRect(),s={};return t=t||[0,0],"horizontal"===o.orient?(s.pixel=e[0]-t[0],s.pixelLength=a.width,s.pixelStart=a.x,s.signal=o.inverse?1:-1):(s.pixel=e[1]-t[1],s.pixelLength=a.height,s.pixelStart=a.y,s.signal=o.inverse?-1:1),s}};Ja({getTargetSeries:function(t){var e=N();return t.eachComponent("dataZoom",function(t){t.eachTargetAxis(function(t,n,i){d(i.getAxisProxy(t.name,n).getTargetSeriesModels(),function(t){e.set(t.uid,t)})})}),e},modifyOutputEnd:!0,overallReset:function(t,e){t.eachComponent("dataZoom",function(t){t.eachTargetAxis(function(t,n,i){i.getAxisProxy(t.name,n).reset(i,e)}),t.eachTargetAxis(function(t,n,i){i.getAxisProxy(t.name,n).filterData(i,e)})}),t.eachComponent("dataZoom",function(t){var e=t.findRepresentativeAxisProxy(),n=e.getDataPercentWindow(),i=e.getDataValueWindow();t.setRawRange({start:n[0],end:n[1],startValue:i[0],endValue:i[1]},!0)})}}),ts("dataZoom",function(t,e){var n=Fc(m(e.eachComponent,e,"dataZoom"),hM,function(t,e){return t.get(e.axisIndex)}),i=[];e.eachComponent({mainType:"dataZoom",query:t},function(t,e){i.push.apply(i,n(t).nodes)}),d(i,function(e,n){e.setRawRange({start:t.start,end:t.end,startValue:t.startValue,endValue:t.endValue})})});var zM={},EM=os({type:"toolbox",layoutMode:{type:"box",ignoreSize:!0},optionUpdated:function(){EM.superApply(this,"optionUpdated",arguments),d(this.option.feature,function(t,e){var n=wd(e);n&&i(t,n.defaultOption)})},defaultOption:{show:!0,z:6,zlevel:0,orient:"horizontal",left:"right",top:"top",backgroundColor:"transparent",borderColor:"#ccc",borderRadius:0,borderWidth:0,padding:5,itemSize:15,itemGap:8,showTitle:!0,iconStyle:{borderColor:"#666",color:"none"},emphasis:{iconStyle:{borderColor:"#3E98C5"}}}});as({type:"toolbox",render:function(t,e,n,i){function r(r,a){var s,c=h[r],d=h[a],f=new pr(l[c],t,t.ecModel);if(c&&!d){if(bd(c))s={model:f,onclick:f.option.onclick,featureName:c};else{var p=wd(c);if(!p)return;s=new p(f,e,n)}u[c]=s}else{if(!(s=u[d]))return;s.model=f,s.ecModel=e,s.api=n}c||!d?f.get("show")&&!s.unusable?(o(f,s,c),f.setIconStatus=function(t,e){var n=this.option,i=this.iconPaths;n.iconStatus=n.iconStatus||{},n.iconStatus[t]=e,i[t]&&i[t].trigger(e)},s.render&&s.render(f,e,n,i)):s.remove&&s.remove(e,n):s.dispose&&s.dispose(e,n)}function o(i,r,o){var l=i.getModel("iconStyle"),u=i.getModel("emphasis.iconStyle"),h=r.getIcons?r.getIcons():i.get("icon"),c=i.get("title")||{};if("string"==typeof h){var f=h,p=c;c={},(h={})[o]=f,c[o]=p}var g=i.iconPaths={};d(h,function(o,h){var d=fr(o,{},{x:-s/2,y:-s/2,width:s,height:s});d.setStyle(l.getItemStyle()),d.hoverStyle=u.getItemStyle(),qi(d),t.get("showTitle")&&(d.__title=c[h],d.on("mouseover",function(){var t=u.getItemStyle();d.setStyle({text:c[h],textPosition:t.textPosition||"bottom",textFill:t.fill||t.stroke||"#000",textAlign:t.textAlign||"center"})}).on("mouseout",function(){d.setStyle({textFill:null})})),d.trigger(i.get("iconStatus."+h)||"normal"),a.add(d),d.on("click",m(r.onclick,r,e,n,h)),g[h]=d})}var a=this.group;if(a.removeAll(),t.get("show")){var s=+t.get("itemSize"),l=t.get("feature")||{},u=this._features||(this._features={}),h=[];d(l,function(t,e){h.push(e)}),new hs(this._featureNames||[],h).add(r).update(r).remove(v(r,null)).execute(),this._featureNames=h,Jh(a,t,n),a.add(tc(a.getBoundingRect(),t)),a.eachChild(function(t){var e=t.__title,i=t.hoverStyle;if(i&&e){var r=ce(e,Ce(i)),o=t.position[0]+a.position[0],l=!1;t.position[1]+a.position[1]+s+r.height>n.getHeight()&&(i.textPosition="top",l=!0);var u=l?-5-r.height:s+8;o+r.width/2>n.getWidth()?(i.textPosition=["100%",u],i.textAlign="right"):o-r.width/2<0&&(i.textPosition=[0,u],i.textAlign="left")}})}},updateView:function(t,e,n,i){d(this._features,function(t){t.updateView&&t.updateView(t.model,e,n,i)})},remove:function(t,e){d(this._features,function(n){n.remove&&n.remove(t,e)}),this.group.removeAll()},dispose:function(t,e){d(this._features,function(n){n.dispose&&n.dispose(t,e)})}});var NM=Sx.toolbox.saveAsImage;Md.defaultOption={show:!0,icon:"M4.7,22.9L29.3,45.5L54.7,23.4M4.6,43.6L4.6,58L53.8,58L53.8,43.6M29.2,45.1L29.2,0",title:NM.title,type:"png",name:"",excludeComponents:["toolbox"],pixelRatio:1,lang:NM.lang.slice()},Md.prototype.unusable=!bp.canvasSupported,Md.prototype.onclick=function(t,e){var n=this.model,i=n.get("name")||t.get("title.0.text")||"echarts",r=document.createElement("a"),o=n.get("type",!0)||"png";r.download=i+"."+o,r.target="_blank";var a=e.getConnectedDataURL({type:o,backgroundColor:n.get("backgroundColor",!0)||t.get("backgroundColor")||"#fff",excludeComponents:n.get("excludeComponents"),pixelRatio:n.get("pixelRatio")});if(r.href=a,"function"!=typeof MouseEvent||bp.browser.ie||bp.browser.edge)if(window.navigator.msSaveOrOpenBlob){for(var s=atob(a.split(",")[1]),l=s.length,u=new Uint8Array(l);l--;)u[l]=s.charCodeAt(l);var h=new Blob([u]);window.navigator.msSaveOrOpenBlob(h,i+"."+o)}else{var c=n.get("lang"),d='';window.open().document.write(d)}else{var f=new MouseEvent("click",{view:window,bubbles:!0,cancelable:!1});r.dispatchEvent(f)}},_d("saveAsImage",Md);var RM=Sx.toolbox.magicType;Sd.defaultOption={show:!0,type:[],icon:{line:"M4.1,28.9h7.1l9.3-22l7.4,38l9.7-19.7l3,12.8h14.9M4.1,58h51.4",bar:"M6.7,22.9h10V48h-10V22.9zM24.9,13h10v35h-10V13zM43.2,2h10v46h-10V2zM3.1,58h53.7",stack:"M8.2,38.4l-8.4,4.1l30.6,15.3L60,42.5l-8.1-4.1l-21.5,11L8.2,38.4z M51.9,30l-8.1,4.2l-13.4,6.9l-13.9-6.9L8.2,30l-8.4,4.2l8.4,4.2l22.2,11l21.5-11l8.1-4.2L51.9,30z M51.9,21.7l-8.1,4.2L35.7,30l-5.3,2.8L24.9,30l-8.4-4.1l-8.3-4.2l-8.4,4.2L8.2,30l8.3,4.2l13.9,6.9l13.4-6.9l8.1-4.2l8.1-4.1L51.9,21.7zM30.4,2.2L-0.2,17.5l8.4,4.1l8.3,4.2l8.4,4.2l5.5,2.7l5.3-2.7l8.1-4.2l8.1-4.2l8.1-4.1L30.4,2.2z",tiled:"M2.3,2.2h22.8V25H2.3V2.2z M35,2.2h22.8V25H35V2.2zM2.3,35h22.8v22.8H2.3V35z M35,35h22.8v22.8H35V35z"},title:n(RM.title),option:{},seriesIndex:{}};var BM=Sd.prototype;BM.getIcons=function(){var t=this.model,e=t.get("icon"),n={};return d(t.get("type"),function(t){e[t]&&(n[t]=e[t])}),n};var VM={line:function(t,e,n,r){if("bar"===t)return i({id:e,type:"line",data:n.get("data"),stack:n.get("stack"),markPoint:n.get("markPoint"),markLine:n.get("markLine")},r.get("option.line")||{},!0)},bar:function(t,e,n,r){if("line"===t)return i({id:e,type:"bar",data:n.get("data"),stack:n.get("stack"),markPoint:n.get("markPoint"),markLine:n.get("markLine")},r.get("option.bar")||{},!0)},stack:function(t,e,n,r){if("line"===t||"bar"===t)return i({id:e,stack:"__ec_magicType_stack__"},r.get("option.stack")||{},!0)},tiled:function(t,e,n,r){if("line"===t||"bar"===t)return i({id:e,stack:""},r.get("option.tiled")||{},!0)}},FM=[["line","bar"],["stack","tiled"]];BM.onclick=function(t,e,n){var i=this.model,r=i.get("seriesIndex."+n);if(VM[n]){var o={series:[]};d(FM,function(t){l(t,n)>=0&&d(t,function(t){i.setIconStatus(t,"normal")})}),i.setIconStatus(n,"emphasis"),t.eachComponent({mainType:"series",query:null==r?null:{seriesIndex:r}},function(e){var r=e.subType,s=e.id,l=VM[n](r,s,e,i);l&&(a(l,e.option),o.series.push(l));var u=e.coordinateSystem;if(u&&"cartesian2d"===u.type&&("line"===n||"bar"===n)){var h=u.getAxesByScale("ordinal")[0];if(h){var c=h.dim+"Axis",d=t.queryComponents({mainType:c,index:e.get(name+"Index"),id:e.get(name+"Id")})[0].componentIndex;o[c]=o[c]||[];for(var f=0;f<=d;f++)o[c][d]=o[c][d]||{};o[c][d].boundaryGap="bar"===n}}}),e.dispatchAction({type:"changeMagicType",currentType:n,newOption:o})}},ts({type:"changeMagicType",event:"magicTypeChanged",update:"prepareAndUpdate"},function(t,e){e.mergeOption(t.newOption)}),_d("magicType",Sd);var HM=Sx.toolbox.dataView,GM=new Array(60).join("-"),WM="\t",ZM=new RegExp("["+WM+"]+","g");zd.defaultOption={show:!0,readOnly:!1,optionToContent:null,contentToOption:null,icon:"M17.5,17.3H33 M17.5,17.3H33 M45.4,29.5h-28 M11.5,2v56H51V14.8L38.4,2H11.5z M38.4,2.2v12.7H51 M45.4,41.7h-28",title:n(HM.title),lang:n(HM.lang),backgroundColor:"#fff",textColor:"#000",textareaColor:"#fff",textareaBorderColor:"#333",buttonColor:"#c23531",buttonTextColor:"#fff"},zd.prototype.onclick=function(t,e){function n(){i.removeChild(o),x._dom=null}var i=e.getDom(),r=this.model;this._dom&&i.removeChild(this._dom);var o=document.createElement("div");o.style.cssText="position:absolute;left:5px;top:5px;bottom:5px;right:5px;",o.style.backgroundColor=r.get("backgroundColor")||"#fff";var a=document.createElement("h4"),s=r.get("lang")||[];a.innerHTML=s[0]||r.get("title"),a.style.cssText="margin: 10px 20px;",a.style.color=r.get("textColor");var l=document.createElement("div"),u=document.createElement("textarea");l.style.cssText="display:block;width:100%;overflow:auto;";var h=r.get("optionToContent"),c=r.get("contentToOption"),d=Dd(t);if("function"==typeof h){var f=h(e.getOption());"string"==typeof f?l.innerHTML=f:S(f)&&l.appendChild(f)}else l.appendChild(u),u.readOnly=r.get("readOnly"),u.style.cssText="width:100%;height:100%;font-family:monospace;font-size:14px;line-height:1.6rem;",u.style.color=r.get("textColor"),u.style.borderColor=r.get("textareaBorderColor"),u.style.backgroundColor=r.get("textareaColor"),u.value=d.value;var p=d.meta,g=document.createElement("div");g.style.cssText="position:absolute;bottom:0;left:0;right:0;";var m="float:right;margin-right:20px;border:none;cursor:pointer;padding:2px 5px;font-size:12px;border-radius:3px",v=document.createElement("div"),y=document.createElement("div");m+=";background-color:"+r.get("buttonColor"),m+=";color:"+r.get("buttonTextColor");var x=this;on(v,"click",n),on(y,"click",function(){var t;try{t="function"==typeof c?c(l,e.getOption()):Od(u.value,p)}catch(t){throw n(),new Error("Data view format error "+t)}t&&e.dispatchAction({type:"changeDataView",newOption:t}),n()}),v.innerHTML=s[1],y.innerHTML=s[2],y.style.cssText=m,v.style.cssText=m,!r.get("readOnly")&&g.appendChild(y),g.appendChild(v),on(u,"keydown",function(t){if(9===(t.keyCode||t.which)){var e=this.value,n=this.selectionStart,i=this.selectionEnd;this.value=e.substring(0,n)+WM+e.substring(i),this.selectionStart=this.selectionEnd=n+1,tm(t)}}),o.appendChild(a),o.appendChild(l),o.appendChild(g),l.style.height=i.clientHeight-80+"px",i.appendChild(o),this._dom=o},zd.prototype.remove=function(t,e){this._dom&&e.getDom().removeChild(this._dom)},zd.prototype.dispose=function(t,e){this.remove(t,e)},_d("dataView",zd),ts({type:"changeDataView",event:"dataViewChanged",update:"prepareAndUpdate"},function(t,e){var n=[];d(t.newOption.series,function(t){var i=e.getSeriesByName(t.name)[0];if(i){var r=i.get("data");n.push({name:t.name,data:Ed(t.data,r)})}else n.push(o({type:"scatter"},t))}),e.mergeOption(a({series:n},t.newOption))});var UM=v,XM=d,jM=f,YM=Math.min,qM=Math.max,$M=Math.pow,KM=1e4,QM=6,JM=6,tS="globalPan",eS={w:[0,0],e:[0,1],n:[1,0],s:[1,1]},nS={w:"ew",e:"ew",n:"ns",s:"ns",ne:"nesw",sw:"nesw",nw:"nwse",se:"nwse"},iS={brushStyle:{lineWidth:2,stroke:"rgba(0,0,0,0.3)",fill:"rgba(0,0,0,0.1)"},transformable:!0,brushMode:"single",removeOnClick:!1},rS=0;Nd.prototype={constructor:Nd,enableBrush:function(t){return this._brushType&&Bd(this),t.brushType&&Rd(this,t),this},setPanels:function(t){if(t&&t.length){var e=this._panels={};d(t,function(t){e[t.panelId]=n(t)})}else this._panels=null;return this},mount:function(t){t=t||{},this._enableGlobalPan=t.enableGlobalPan;var e=this.group;return this._zr.add(e),e.attr({position:t.position||[0,0],rotation:t.rotation||0,scale:t.scale||[1,1]}),this._transform=e.getLocalTransform(),this},eachCover:function(t,e){XM(this._covers,t,e)},updateCovers:function(t){function e(t,e){return(null!=t.id?t.id:o+e)+"-"+t.brushType}function r(e,n){var i=t[e];if(null!=n&&a[n]===u)s[e]=a[n];else{var r=s[e]=null!=n?(a[n].__brushOption=i,a[n]):Fd(l,Vd(l,i));Wd(l,r)}}t=f(t,function(t){return i(n(iS),t,!0)});var o="\0-brush-index-",a=this._covers,s=this._covers=[],l=this,u=this._creatingCover;return new hs(a,t,function(t,n){return e(t.__brushOption,n)},e).add(r).update(r).remove(function(t){a[t]!==u&&l.group.remove(a[t])}).execute(),this},unmount:function(){return this.enableBrush(!1),jd(this),this._zr.remove(this.group),this},dispose:function(){this.unmount(),this.off()}},h(Nd,Zp);var oS={mousedown:function(t){if(this._dragging)mf.call(this,t);else if(!t.target||!t.target.draggable){df(t);var e=this.group.transformCoordToLocal(t.offsetX,t.offsetY);this._creatingCover=null,(this._creatingPanel=Ud(this,t,e))&&(this._dragging=!0,this._track=[e.slice()])}},mousemove:function(t){var e=this.group.transformCoordToLocal(t.offsetX,t.offsetY);if(cf(this,t,e),this._dragging){df(t);var 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b/agent-analyer/src/main/resources/static/js/layui/lay/modules/util.js @@ -0,0 +1,2 @@ +/** layui-v2.3.0 MIT License By https://www.layui.com */ + ;layui.define("jquery",function(e){"use strict";var t=layui.$,i={fixbar:function(e){var i,a,o="layui-fixbar",r="layui-fixbar-top",l=t(document),n=t("body");e=t.extend({showHeight:200},e),e.bar1=e.bar1===!0?"":e.bar1,e.bar2=e.bar2===!0?"":e.bar2,e.bgcolor=e.bgcolor?"background-color:"+e.bgcolor:"";var c=[e.bar1,e.bar2,""],g=t(['
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agent/src/main/java/com/wenshuo/agent/applog/Slf4jAppLog.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java b/agent/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ByteArrayClassPath.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java b/agent/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CannotCompileException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java b/agent/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ClassClassPath.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassMap.java b/agent/src/main/java/com/wenshuo/agent/javassist/ClassMap.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ClassMap.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ClassMap.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPath.java b/agent/src/main/java/com/wenshuo/agent/javassist/ClassPath.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ClassPath.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ClassPath.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPool.java b/agent/src/main/java/com/wenshuo/agent/javassist/ClassPool.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ClassPool.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ClassPool.java diff --git a/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java b/agent/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java rename to agent/src/main/java/com/wenshuo/agent/javassist/ClassPoolTail.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java b/agent/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CodeConverter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CodeConverter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtArray.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtArray.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtArray.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtArray.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtBehavior.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtBehavior.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtClass.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtClass.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtClass.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtClass.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtClassType.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtClassType.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtClassType.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtClassType.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtConstructor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtConstructor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtField.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtField.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtField.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtField.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtMember.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtMember.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtMember.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtMember.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtMethod.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtMethod.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtMethod.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtMethod.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewClass.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewClass.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewConstructor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewMethod.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewNestedClass.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedConstructor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtNewWrappedMethod.java diff --git a/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java b/agent/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java rename to agent/src/main/java/com/wenshuo/agent/javassist/CtPrimitiveType.java diff --git a/src/main/java/com/wenshuo/agent/javassist/Loader.java b/agent/src/main/java/com/wenshuo/agent/javassist/Loader.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/Loader.java rename to agent/src/main/java/com/wenshuo/agent/javassist/Loader.java diff --git a/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java b/agent/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java rename to agent/src/main/java/com/wenshuo/agent/javassist/LoaderClassPath.java diff --git a/src/main/java/com/wenshuo/agent/javassist/Modifier.java b/agent/src/main/java/com/wenshuo/agent/javassist/Modifier.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/Modifier.java rename to agent/src/main/java/com/wenshuo/agent/javassist/Modifier.java diff --git a/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java b/agent/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/NotFoundException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/NotFoundException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java b/agent/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java rename to agent/src/main/java/com/wenshuo/agent/javassist/SerialVersionUID.java diff --git a/src/main/java/com/wenshuo/agent/javassist/Translator.java b/agent/src/main/java/com/wenshuo/agent/javassist/Translator.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/Translator.java rename to agent/src/main/java/com/wenshuo/agent/javassist/Translator.java diff --git a/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java b/agent/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/URLClassPath.java rename to agent/src/main/java/com/wenshuo/agent/javassist/URLClassPath.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AccessFlag.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationDefaultAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AnnotationsAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/AttributeInfo.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/BadBytecode.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/BootstrapMethodsAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteArray.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ByteStream.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Bytecode.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFile.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFilePrinter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ClassFileWriter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAnalyzer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/CodeIterator.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstPool.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ConstantAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/DeprecatedAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Descriptor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/DuplicateMemberException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/EnclosingMethodAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionTable.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ExceptionsAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/FieldInfo.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/InnerClassesAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/InstructionPrinter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LineNumberAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LocalVariableTypeAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/LongVector.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodInfo.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/MethodParametersAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Mnemonic.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/Opcode.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/ParameterAnnotationsAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SignatureAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SourceFileAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMap.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/StackMapTable.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/SyntheticAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/TypeAnnotationsAttribute.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Analyzer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/ControlFlow.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Executor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Frame.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/FramePrinter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/IntQueue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiArrayType.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/MultiType.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Subroutine.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/SubroutineScanner.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Type.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/Util.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/analysis/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/Annotation.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationImpl.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/AnnotationsWriter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ArrayMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/BooleanMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ByteMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/CharMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ClassMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/DoubleMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/EnumMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/FloatMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/IntegerMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/LongMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/MemberValueVisitor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/NoSuchClassError.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/ShortMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/StringMemberValue.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/TypeAnnotationsWriter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/annotation/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/BasicBlock.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/MapMaker.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/Tracer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeData.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypeTag.java diff --git a/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java b/agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java rename to agent/src/main/java/com/wenshuo/agent/javassist/bytecode/stackmap/TypedBlock.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/AccessorMaker.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/CodeGen.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/CompileError.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/Javac.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/JvstCodeGen.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/JvstTypeChecker.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/KeywordTable.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/Lex.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/MemberCodeGen.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/MemberResolver.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/NoFieldException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/Parser.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ProceedHandler.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/SymbolTable.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/SyntaxError.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/TokenId.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/TypeChecker.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTList.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ASTree.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/ArrayInit.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/AssignExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/BinExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CallExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CastExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/CondExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Declarator.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/DoubleConst.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Expr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/FieldDecl.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/InstanceOfExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/IntConst.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Keyword.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Member.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/MethodDecl.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/NewExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Pair.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Stmnt.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/StringL.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Symbol.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Variable.java diff --git a/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java b/agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/compiler/ast/Visitor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformAccessArrayField.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformAfter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformBefore.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformCall.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformFieldAccess.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformNew.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformNewClass.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformReadField.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/TransformWriteField.java diff --git a/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java b/agent/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/convert/Transformer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/Cast.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/Cast.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/ConstructorCall.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/Expr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/Expr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/ExprEditor.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/FieldAccess.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/Handler.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/Handler.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/Instanceof.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/MethodCall.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/NewArray.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java b/agent/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/NewExpr.java diff --git a/src/main/java/com/wenshuo/agent/javassist/expr/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/expr/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/expr/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/expr/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java b/agent/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java rename to agent/src/main/java/com/wenshuo/agent/javassist/runtime/Cflow.java diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java b/agent/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java rename to agent/src/main/java/com/wenshuo/agent/javassist/runtime/Desc.java diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java b/agent/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java rename to agent/src/main/java/com/wenshuo/agent/javassist/runtime/DotClass.java diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java b/agent/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java rename to agent/src/main/java/com/wenshuo/agent/javassist/runtime/Inner.java diff --git a/src/main/java/com/wenshuo/agent/javassist/runtime/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/runtime/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/runtime/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/runtime/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPool.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactory.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolFactoryImpl.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepository.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/ScopedClassPoolRepositoryImpl.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/SoftValueHashMap.java diff --git a/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/scopedpool/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/Callback.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/Callback.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/Dump.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/Dump.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/framedump.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/framedump.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/tools/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotCreateException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotInvokeException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/CannotReflectException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/ClassMetaobject.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Compiler.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Loader.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metalevel.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Metaobject.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Reflection.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/Sample.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/reflect/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/AppletServer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectImporter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/ObjectNotFoundException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Proxy.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteException.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/RemoteRef.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/Sample.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/StubGenerator.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/rmi/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/web/BadHttpRequest.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/web/Viewer.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java b/agent/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/web/Webserver.java diff --git a/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/tools/web/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/tools/web/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/HotSwapper.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/util/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/util/package.html diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/FactoryHelper.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodFilter.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/MethodHandler.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/Proxy.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyFactory.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObject.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectInputStream.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/ProxyObjectOutputStream.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/RuntimeSupport.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/SecurityActions.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/SerializedProxy.java diff --git a/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html b/agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html similarity index 100% rename from src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html rename to agent/src/main/java/com/wenshuo/agent/javassist/util/proxy/package.html diff --git a/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java b/agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java similarity index 100% rename from src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java rename to agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java diff --git a/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java b/agent/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java similarity index 100% rename from src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java rename to agent/src/main/java/com/wenshuo/agent/log/MethodExecuteJSONformatter.java diff --git a/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java b/agent/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java similarity index 100% rename from src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java rename to agent/src/main/java/com/wenshuo/agent/log/OutputLogRunnable.java diff --git a/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java similarity index 100% rename from src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java rename to agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java diff --git a/src/main/resources/agent.properties b/agent/src/main/resources/agent.properties similarity index 100% rename from src/main/resources/agent.properties rename to agent/src/main/resources/agent.properties diff --git a/src/test/java/com/wenshuo/agent/test/TestCtMethod.java b/agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java similarity index 100% rename from src/test/java/com/wenshuo/agent/test/TestCtMethod.java rename to agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java From b6b19c41dc253db3134e7089764c59dff8501817 Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Tue, 10 Sep 2024 10:29:58 +0800 Subject: [PATCH 22/25] =?UTF-8?q?=E6=B7=BB=E5=8A=A0agent-analyzer=E5=90=AF?= =?UTF-8?q?=E5=8A=A8=E8=84=9A=E6=9C=AC?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 2 +- agent-analyer/agent-analyzer.iml | 99 ----------- agent-analyer/bin/README.md | 28 ++++ agent-analyer/bin/run.sh | 36 ++++ agent-analyer/bin/stop.sh | 18 ++ agent-analyer/pom.xml | 276 +++++++++++++++---------------- 6 files changed, 221 insertions(+), 238 deletions(-) delete mode 100644 agent-analyer/agent-analyzer.iml create mode 100644 agent-analyer/bin/README.md create mode 100755 agent-analyer/bin/run.sh create mode 100755 agent-analyer/bin/stop.sh diff --git a/.gitignore b/.gitignore index 07f590f..cf93773 100644 --- a/.gitignore +++ b/.gitignore @@ -7,7 +7,7 @@ *.jar *.war *.ear -javaagent.iml +*.iml # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml hs_err_pid* diff --git a/agent-analyer/agent-analyzer.iml b/agent-analyer/agent-analyzer.iml deleted file mode 100644 index 591b2be..0000000 --- a/agent-analyer/agent-analyzer.iml +++ /dev/null @@ -1,99 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - \ No newline at end of file diff --git a/agent-analyer/bin/README.md b/agent-analyer/bin/README.md new file mode 100644 index 0000000..3ac1bdc --- /dev/null +++ b/agent-analyer/bin/README.md @@ -0,0 +1,28 @@ +# agent-analyzer启动教程 + +## 启动服务 + +启动 agent-analyzer 有以下两种方式，请使用提供的脚本(`run.sh`)启动程序 + +### 使用 `run.sh` 启动程序 + +请使用如下命令启动服务：`sh run.sh [port] [jmx-port]` + ++ `port` 为访问 UIM API 的端口，如果不指定的话，默认为 **80** ++ `jmx-port` 为 JMX 远程监控端口。如果不指定的话，不会开启 + + +## 验证启动是否成功 + +在运行 shell 脚本后，静候一小段时间，在浏览器中键入以下地址，即可查看是否启动成功： + +`http://ip:port/` + + +## 停止服务 + +使用如下脚本停止服务，这样会停止所有的 `agent-analyzer` 服务。 + +```bash +sh stop.sh +``` \ No newline at end of file diff --git a/agent-analyer/bin/run.sh b/agent-analyer/bin/run.sh new file mode 100755 index 0000000..dec8295 --- /dev/null +++ b/agent-analyer/bin/run.sh @@ -0,0 +1,36 @@ +#!/bin/bash +DIR1="`dirname $BASH_SOURCE`" +CURRENT_PATH=`readlink -f "$DIR1"` + +APP_NAME="agent-analyzer.jar" + +APP_PORT=8080 +if [ -z "$1" ] +then + echo "没有指定程序端口，将使用默认端口 ${APP_PORT}" +else + APP_PORT=$1 +fi + + +echo "尝试获取本机 ip 地址" +IP_ADDR='127.0.0.1' +IP_ADDR=$(ip addr | awk '/^[0-9]+: / {}; /inet.*global/ {print gensub(/(.*)\/(.*)/, "\\1", "g", $2)}') +echo "成功获取本机 ip 地址: $IP_ADDR" + +JAVA_OPT="${JAVA_OPT} -server -Xms512m -Xmx2g -Xmn256m" +JAVA_OPT="${JAVA_OPT} -XX:+UseG1GC" +JAVA_OPT="${JAVA_OPT} -XX:+HeapDumpOnOutOfMemoryError" +if [ -z "$2" ] +then + echo "没有指定 JMX 远程端口，将无法进行远程监控" +else + JAVA_OPT="${JAVA_OPT} -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=${2} -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostn +ame=${IP_ADDR}" +fi + +echo "程序运行参数为：${JAVA_OPT}" +echo "程序运行端口为：${APP_PORT}" + +nohup java ${JAVA_OPT} -jar ${CURRENT_PATH}/${APP_NAME} --server.port=$APP_PORT > nohup_${APP_PORT}.out 2>&1 & + diff --git a/agent-analyer/bin/stop.sh b/agent-analyer/bin/stop.sh new file mode 100755 index 0000000..4f7473c --- /dev/null +++ b/agent-analyer/bin/stop.sh @@ -0,0 +1,18 @@ +#!/bin/bash +# add comment +if [ -z "$1" ] +then + pid=`ps ax |grep -i 'agent-analyzer.jar' |grep java | grep -v grep | awk '{print $1}'` +else + pid=`ps ax |grep -i 'agent-analyzer.jar' |grep java | grep -i 'server.port='''${1}''''| grep -v grep | awk '{print $1}'` +fi + +if [ -z "$pid" ] ; then + echo "agent-analyzer is not running." + exit 0; +fi +echo "agent-analyzer(${pid}) is running." +echo "Send shutdown request to agent-analyzer(${pid})....." +kill -9 ${pid} +echo "Shutdown agent-analyzer(${pid}) success." + \ No newline at end of file diff --git a/agent-analyer/pom.xml b/agent-analyer/pom.xml index db7e3bc..16c3c8f 100644 --- a/agent-analyer/pom.xml +++ b/agent-analyer/pom.xml @@ -1,138 +1,138 @@ - - 4.0.0 - - com.wenshuo - agent-analyzer - 1.0.0 - war - - agent日志分析器 - - - UTF-8 - 1.8 - 2.6.7 - 1.2.83 - 2.15.1 - - - - - - - org.springframework.boot - spring-boot-dependencies - ${springboot.version} - pom - import - - - - - - - org.projectlombok - lombok - - - org.springframework.boot - spring-boot-starter-web - - - org.apache.commons - commons-lang3 - - - - - - - - - - com.alibaba - fastjson - ${fastjson.version} - - - - org.springframework.boot - spring-boot-starter-data-jpa - - - - com.h2database - h2 - runtime - - - - commons-io - commons-io - ${commons-io.version} - - - commons-logging - commons-logging - 1.2 - compile - - - - - agent-analyzer - - - src/main/java - - **/*.xml - - - - ${basedir}/src/main/webapp - META-INF/resources - - **/** - - - - src/main/resources - false - - .gitkeep - - - ** - - - - - - org.apache.maven.plugins - maven-compiler-plugin - 3.8.1 - - ${java.version} - ${java.version} - - - - org.springframework.boot - spring-boot-maven-plugin - ${springboot.version} - - - - repackage - - - - - com.wenshuo.agent.analyzer.AgentAnalyzer - true - - - - - + + 4.0.0 + + com.wenshuo + agent-analyzer + 1.0.0 + jar + + agent日志分析器 + + + UTF-8 + 1.8 + 2.6.7 + 1.2.83 + 2.15.1 + + + + + + + org.springframework.boot + spring-boot-dependencies + ${springboot.version} + pom + import + + + + + + + org.projectlombok + lombok + + + org.springframework.boot + spring-boot-starter-web + + + org.apache.commons + commons-lang3 + + + + + + + + + + com.alibaba + fastjson + ${fastjson.version} + + + + org.springframework.boot + spring-boot-starter-data-jpa + + + + com.h2database + h2 + runtime + + + + commons-io + commons-io + ${commons-io.version} + + + commons-logging + commons-logging + 1.2 + compile + + + + + agent-analyzer + + + src/main/java + + **/*.xml + + + + ${basedir}/src/main/webapp + META-INF/resources + + **/** + + + + src/main/resources + false + + .gitkeep + + + ** + + + + + + org.apache.maven.plugins + maven-compiler-plugin + 3.8.1 + + ${java.version} + ${java.version} + + + + org.springframework.boot + spring-boot-maven-plugin + ${springboot.version} + + + + repackage + + + + + com.wenshuo.agent.analyzer.AgentAnalyzer + true + + + + + From c2b0951714bace80c47dfe0e9d094257adbf211f Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Wed, 11 Sep 2024 11:27:17 +0800 Subject: [PATCH 23/25] =?UTF-8?q?bugfix:=20=E5=A4=84=E7=90=86=E5=B7=A6?= =?UTF-8?q?=E4=BE=A7=E5=AF=BC=E8=88=AA=E5=86=85=E5=AE=B9=E8=BF=87=E5=A4=9A?= =?UTF-8?q?=E6=97=B6=E6=98=BE=E7=A4=BA=E4=B8=8D=E5=85=A8=E9=97=AE=E9=A2=98?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../src/main/resources/static/index.html | 1266 ++++++++--------- 1 file changed, 633 insertions(+), 633 deletions(-) diff --git a/agent-analyer/src/main/resources/static/index.html b/agent-analyer/src/main/resources/static/index.html index 1fa50c3..2d06738 100644 --- a/agent-analyer/src/main/resources/static/index.html +++ b/agent-analyer/src/main/resources/static/index.html @@ -1,634 +1,634 @@ - - - - - agent日志自动化工具 - - - - -
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        + + + + + + + + + + \ No newline at end of file From fbab9fa50b8386c8ff17bb6af2f7f45f1f1394a6 Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Mon, 30 Sep 2024 11:47:19 +0800 Subject: [PATCH 24/25] =?UTF-8?q?bugfix:=20=E5=A4=84=E7=90=86=E6=96=B9?= =?UTF-8?q?=E6=B3=95=E5=BC=82=E5=B8=B8=E6=97=B6=E6=97=A0=E6=B3=95=E8=AE=B0?= =?UTF-8?q?=E5=BD=95=E6=96=B9=E6=B3=95=E6=89=A7=E8=A1=8C=E6=97=A5=E5=BF=97?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../wenshuo/agent/log/ExecuteLogUtils.java | 1 + .../AgentLogClassFileTransformer.java | 7 +-- .../com/wenshuo/agent/test/TestCtMethod.java | 49 ++++++++++++++++--- 3 files changed, 48 insertions(+), 9 deletions(-) diff --git a/agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java b/agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java index 8ac2305..e74753d 100644 --- a/agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java +++ b/agent/src/main/java/com/wenshuo/agent/log/ExecuteLogUtils.java @@ -165,6 +165,7 @@ private static void logExecuteCounter(String className, String methodName, long int compression = 150; int factor = 5; md = new MergingDigest(compression, (factor + 1) * compression, compression); + md.add(executeTime); } methodCounterMap.put(methodName, new Object[] {1L, executeTime, md}); } else { diff --git a/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java index 6602f06..7b6a16b 100644 --- a/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ b/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -59,6 +59,7 @@ private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { } byteCode = aopLog(cc, className, byteCode); } catch (Exception ex) { + ex.printStackTrace(); log.error(ex.getMessage(), ex); } return byteCode; @@ -100,10 +101,10 @@ private void aopLog(String className, CtMethod m) throws CannotCompileException // 避免变量名重复 m.addLocalVariable("dingjsh_javaagent_elapsedTime", CtClass.longType); + m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;" + + LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() + + "\",(long)dingjsh_javaagent_elapsedTime" + ");", true); m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); - m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;"); - m.insertAfter(LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() - + "\",(long)dingjsh_javaagent_elapsedTime" + ");"); } /** diff --git a/agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java b/agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java index 66ec31a..273b8bc 100644 --- a/agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java +++ b/agent/src/test/java/com/wenshuo/agent/test/TestCtMethod.java @@ -10,16 +10,12 @@ import com.tdunning.math.stats.Dist; import com.tdunning.math.stats.MergingDigest; import com.tdunning.math.stats.ScaleFunction; +import com.wenshuo.agent.ConfigUtils; +import com.wenshuo.agent.javassist.*; import org.junit.Assert; import org.junit.Ignore; import org.junit.Test; -import com.wenshuo.agent.javassist.ClassPool; -import com.wenshuo.agent.javassist.CtClass; -import com.wenshuo.agent.javassist.CtMethod; -import com.wenshuo.agent.javassist.Modifier; -import com.wenshuo.agent.javassist.NotFoundException; - public class TestCtMethod { private static List staticMethodNames = Arrays.asList("privateStatic","protectedStatic","publicStatic","defaultStatic"); @@ -53,6 +49,47 @@ static void defaultStatic(){ System.out.println("I'm default and static"); } + public static Object publicStaticWithResult(){ + String result = null; + System.out.println("I'm public and static"); + Random random = new Random(); + if(random.nextInt(100) < 50){ + result = new String("hello world：random.nextInt(100) < 50"); + return result; + } + result = new String("hello world：random.nextInt(100) >= 50"); + return result; + } + + @Test + @Ignore + public void asFinallyTest() throws Exception { + String className = "com.wenshuo.agent.test.TestCtMethod"; + ClassPool pool = ClassPool.getDefault(); + CtClass ctClass = pool.get(className); + + transformerMethod(className, ctClass.getDeclaredMethod("publicStatic")); + transformerMethod(className, ctClass.getDeclaredMethod("publicStaticWithResult")); + + ctClass.writeFile("/home/code/github/javaagent/agent/target"); + } + + private static void transformerMethod(String className, CtMethod m) throws CannotCompileException { + boolean isMethodStatic = Modifier.isStatic(m.getModifiers()); + String aopClassName = isMethodStatic ? "\"" + className + "\"" : "this.getClass().getName()"; + final String timeMethodStr + = ConfigUtils.isUsingNanoTime() ? "java.lang.System.nanoTime()" : "java.lang.System.currentTimeMillis" + + "()"; + String LOG_UTILS = "com.wenshuo.agent.log.ExecuteLogUtils"; + + // 避免变量名重复 + m.addLocalVariable("dingjsh_javaagent_elapsedTime", CtClass.longType); + m.insertAfter("dingjsh_javaagent_elapsedTime = " + timeMethodStr + " - dingjsh_javaagent_elapsedTime;" + + LOG_UTILS + ".log(" + aopClassName + ",\"" + m.getName() + + "\",(long)dingjsh_javaagent_elapsedTime" + ");", true); + m.insertBefore("dingjsh_javaagent_elapsedTime = " + timeMethodStr + ";"); + } + /** * 100个线程并发测试，每个线程往100个不同的Digest中添加5000000个随机数据[0, 100]，并计算耗时
        From 60874a6bf279ea08dc298f9f85444d16f8ff3969 Mon Sep 17 00:00:00 2001 From: fanzhongwei Date: Mon, 30 Sep 2024 12:00:51 +0800 Subject: [PATCH 25/25] =?UTF-8?q?bugfix:=20javaagent=E4=BF=AE=E6=94=B9?= =?UTF-8?q?=E5=AD=97=E8=8A=82=E7=A0=81=E5=A4=B1=E8=B4=A5=E6=97=B6=E8=BE=93?= =?UTF-8?q?=E5=87=BA=E6=8E=A7=E5=88=B6=E5=8F=B0=E6=97=A5=E5=BF=97?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../wenshuo/agent/transformer/AgentLogClassFileTransformer.java | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java b/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java index 7b6a16b..60cf216 100644 --- a/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java +++ b/agent/src/main/java/com/wenshuo/agent/transformer/AgentLogClassFileTransformer.java @@ -59,7 +59,7 @@ private byte[] aopLog(ClassLoader loader, String className, byte[] byteCode) { } byteCode = aopLog(cc, className, byteCode); } catch (Exception ex) { - ex.printStackTrace(); + System.err.println("javaagent修改字节码失败，失败原因：" + ex.getMessage()); log.error(ex.getMessage(), ex); } return byteCode;