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#include <cpptrace/exceptions.hpp>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstring>
#include <new>
#include <stdexcept>
#include <string>
#include "platform/exception_type.hpp"
#include "utils/common.hpp"
namespace cpptrace {
namespace detail {
lazy_trace_holder::lazy_trace_holder(const lazy_trace_holder& other) : resolved(other.resolved) {
if(other.resolved) {
new (&resolved_trace) stacktrace(other.resolved_trace);
} else {
new (&trace) raw_trace(other.trace);
}
}
lazy_trace_holder::lazy_trace_holder(lazy_trace_holder&& other) noexcept : resolved(other.resolved) {
if(other.resolved) {
new (&resolved_trace) stacktrace(std::move(other.resolved_trace));
} else {
new (&trace) raw_trace(std::move(other.trace));
}
}
lazy_trace_holder& lazy_trace_holder::operator=(const lazy_trace_holder& other) {
clear();
resolved = other.resolved;
if(other.resolved) {
new (&resolved_trace) stacktrace(other.resolved_trace);
} else {
new (&trace) raw_trace(other.trace);
}
return *this;
}
lazy_trace_holder& lazy_trace_holder::operator=(lazy_trace_holder&& other) noexcept {
clear();
resolved = other.resolved;
if(other.resolved) {
new (&resolved_trace) stacktrace(std::move(other.resolved_trace));
} else {
new (&trace) raw_trace(std::move(other.trace));
}
return *this;
}
lazy_trace_holder::~lazy_trace_holder() {
clear();
}
// access
const raw_trace& lazy_trace_holder::get_raw_trace() const {
if(resolved) {
throw std::logic_error(
"cpptrace::detail::lazy_trace_holder::get_resolved_trace called on resolved holder"
);
}
return trace;
}
stacktrace& lazy_trace_holder::get_resolved_trace() {
if(!resolved) {
raw_trace old_trace = std::move(trace);
*this = lazy_trace_holder(stacktrace{});
try {
if(!old_trace.empty()) {
resolved_trace = old_trace.resolve();
}
} catch(const std::exception& e) {
if(!detail::should_absorb_trace_exceptions()) {
// TODO: Append to message somehow?
std::fprintf(
stderr,
"Exception occurred while resolving trace in cpptrace::detail::lazy_trace_holder:\n%s\n",
e.what()
);
}
}
}
return resolved_trace;
}
const stacktrace& lazy_trace_holder::get_resolved_trace() const {
if(!resolved) {
throw std::logic_error(
"cpptrace::detail::lazy_trace_holder::get_resolved_trace called on unresolved const holder"
);
}
return resolved_trace;
}
void lazy_trace_holder::clear() {
if(resolved) {
resolved_trace.~stacktrace();
} else {
trace.~raw_trace();
}
}
CPPTRACE_FORCE_NO_INLINE
raw_trace get_raw_trace_and_absorb(std::size_t skip, std::size_t max_depth) {
try {
return generate_raw_trace(skip + 1, max_depth);
} catch(const std::exception& e) {
if(!detail::should_absorb_trace_exceptions()) {
// TODO: Append to message somehow
std::fprintf(
stderr,
"Cpptrace: Exception occurred while resolving trace in cpptrace::exception object:\n%s\n",
e.what()
);
}
return raw_trace{};
}
}
CPPTRACE_FORCE_NO_INLINE
raw_trace get_raw_trace_and_absorb(std::size_t skip) {
try { // try/catch can never be hit but it's needed to prevent TCO
return get_raw_trace_and_absorb(skip + 1, SIZE_MAX);
} catch(...) {
if(!detail::should_absorb_trace_exceptions()) {
throw;
}
return raw_trace{};
}
}
}
const char* lazy_exception::what() const noexcept {
if(what_string.empty()) {
what_string = message() + std::string(":\n") + trace_holder.get_resolved_trace().to_string();
}
return what_string.c_str();
}
const char* lazy_exception::message() const noexcept {
return "cpptrace::lazy_exception";
}
const stacktrace& lazy_exception::trace() const noexcept {
return trace_holder.get_resolved_trace();
}
const char* exception_with_message::message() const noexcept {
return user_message.c_str();
}
system_error::system_error(int error_code, std::string&& message_arg, raw_trace&& trace) noexcept
: runtime_error(
message_arg + ": " + std::error_code(error_code, std::generic_category()).message(),
std::move(trace)
),
ec(std::error_code(error_code, std::generic_category())) {}
const std::error_code& system_error::code() const noexcept {
return ec;
}
const char* nested_exception::message() const noexcept {
if(message_value.empty()) {
try {
std::rethrow_exception(ptr);
} catch(std::exception& e) {
message_value = std::string("Nested exception: ") + e.what();
} catch(...) {
message_value = "Nested exception holding instance of " + detail::exception_type_name();
}
}
return message_value.c_str();
}
std::exception_ptr nested_exception::nested_ptr() const noexcept {
return ptr;
}
CPPTRACE_FORCE_NO_INLINE
void rethrow_and_wrap_if_needed(std::size_t skip) {
try {
std::rethrow_exception(std::current_exception());
} catch(cpptrace::exception&) {
throw; // already a cpptrace::exception
} catch(...) {
throw nested_exception(std::current_exception(), detail::get_raw_trace_and_absorb(skip + 1));
}
}
}