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linker_namespaces.cpp
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88 lines (76 loc) · 2.72 KB
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/*
* Copyright (C) 2016 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "linker_namespaces.h"
#include "linker_globals.h"
#include "linker_soinfo.h"
#include "linker_utils.h"
bool android_namespace_t::is_accessible(const std::string& file) {
if (!is_isolated_) {
return true;
}
for (const auto& dir : ld_library_paths_) {
if (file_is_in_dir(file, dir)) {
return true;
}
}
for (const auto& dir : default_library_paths_) {
if (file_is_in_dir(file, dir)) {
return true;
}
}
for (const auto& dir : permitted_paths_) {
if (file_is_under_dir(file, dir)) {
return true;
}
}
return false;
}
bool android_namespace_t::is_accessible(soinfo* s) {
auto is_accessible_ftor = [this] (soinfo* si) {
// This is workaround for apps hacking into soinfo list.
// and inserting their own entries into it. (http://b/37191433)
if (!si->has_min_version(3)) {
DL_WARN("invalid soinfo version for \"%s\"", si->get_soname());
return false;
}
if (si->get_primary_namespace() == this) {
return true;
}
const android_namespace_list_t& secondary_namespaces = si->get_secondary_namespaces();
if (secondary_namespaces.find(this) != secondary_namespaces.end()) {
return true;
}
return false;
};
if (is_accessible_ftor(s)) {
return true;
}
return !s->get_parents().visit([&](soinfo* si) {
return !is_accessible_ftor(si);
});
}