/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "art_api/dex_file_support.h"
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#include <dlfcn.h>
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#include <mutex>
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#ifndef STATIC_LIB
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// Not used in the static lib, so avoid a dependency on this header in
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// libdexfile_support_static.
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#include <log/log.h>
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#endif
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namespace art_api {
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namespace dex {
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#ifdef STATIC_LIB
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#define DEFINE_DLFUNC_PTR(CLASS, DLFUNC) decltype(DLFUNC)* CLASS::g_##DLFUNC = DLFUNC
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#else
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#define DEFINE_DLFUNC_PTR(CLASS, DLFUNC) decltype(DLFUNC)* CLASS::g_##DLFUNC = nullptr
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#endif
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DEFINE_DLFUNC_PTR(DexString, ExtDexFileMakeString);
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DEFINE_DLFUNC_PTR(DexString, ExtDexFileGetString);
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DEFINE_DLFUNC_PTR(DexString, ExtDexFileFreeString);
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DEFINE_DLFUNC_PTR(DexFile, ExtDexFileOpenFromMemory);
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DEFINE_DLFUNC_PTR(DexFile, ExtDexFileOpenFromFd);
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DEFINE_DLFUNC_PTR(DexFile, ExtDexFileGetMethodInfoForOffset);
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DEFINE_DLFUNC_PTR(DexFile, ExtDexFileGetAllMethodInfos);
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DEFINE_DLFUNC_PTR(DexFile, ExtDexFileFree);
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#undef DEFINE_DLFUNC_PTR
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void LoadLibdexfileExternal() {
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#if defined(STATIC_LIB)
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// Nothing to do here since all function pointers are initialised statically.
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#elif defined(NO_DEXFILE_SUPPORT)
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LOG_FATAL("Dex file support not available.");
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#else
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static std::once_flag dlopen_once;
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std::call_once(dlopen_once, []() {
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constexpr char kLibdexfileExternalLib[] = "libdexfile_external.so";
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void* handle =
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dlopen(kLibdexfileExternalLib, RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE);
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LOG_ALWAYS_FATAL_IF(handle == nullptr, "Failed to load %s: %s",
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kLibdexfileExternalLib, dlerror());
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#define SET_DLFUNC_PTR(CLASS, DLFUNC) \
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do { \
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CLASS::g_##DLFUNC = reinterpret_cast<decltype(DLFUNC)*>(dlsym(handle, #DLFUNC)); \
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LOG_ALWAYS_FATAL_IF(CLASS::g_##DLFUNC == nullptr, \
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"Failed to find %s in %s: %s", \
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#DLFUNC, \
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kLibdexfileExternalLib, \
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dlerror()); \
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} while (0)
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SET_DLFUNC_PTR(DexString, ExtDexFileMakeString);
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SET_DLFUNC_PTR(DexString, ExtDexFileGetString);
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SET_DLFUNC_PTR(DexString, ExtDexFileFreeString);
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SET_DLFUNC_PTR(DexFile, ExtDexFileOpenFromMemory);
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SET_DLFUNC_PTR(DexFile, ExtDexFileOpenFromFd);
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SET_DLFUNC_PTR(DexFile, ExtDexFileGetMethodInfoForOffset);
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SET_DLFUNC_PTR(DexFile, ExtDexFileGetAllMethodInfos);
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SET_DLFUNC_PTR(DexFile, ExtDexFileFree);
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#undef SET_DLFUNC_PTR
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});
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#endif // !defined(NO_DEXFILE_SUPPORT) && !defined(STATIC_LIB)
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}
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DexFile::~DexFile() { g_ExtDexFileFree(ext_dex_file_); }
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MethodInfo DexFile::AbsorbMethodInfo(const ExtDexFileMethodInfo& ext_method_info) {
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return {ext_method_info.offset, ext_method_info.len, DexString(ext_method_info.name)};
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}
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void DexFile::AddMethodInfoCallback(const ExtDexFileMethodInfo* ext_method_info, void* ctx) {
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auto vect = static_cast<MethodInfoVector*>(ctx);
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vect->emplace_back(AbsorbMethodInfo(*ext_method_info));
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}
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} // namespace dex
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} // namespace art_api
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