blob: 446fe161f149f9a24506bb191ff3f2894ee7dc43 [file] [log] [blame]
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "art_api/dex_file_support.h"
#include <dlfcn.h>
#include <mutex>
#ifndef STATIC_LIB
// Not used in the static lib, so avoid a dependency on this header in
// libdexfile_support_static.
#include <log/log.h>
#endif
namespace art_api {
namespace dex {
#ifdef STATIC_LIB
#define DEFINE_DLFUNC_PTR(CLASS, DLFUNC) decltype(DLFUNC)* CLASS::g_##DLFUNC = DLFUNC
#else
#define DEFINE_DLFUNC_PTR(CLASS, DLFUNC) decltype(DLFUNC)* CLASS::g_##DLFUNC = nullptr
#endif
DEFINE_DLFUNC_PTR(DexString, ExtDexFileMakeString);
DEFINE_DLFUNC_PTR(DexString, ExtDexFileGetString);
DEFINE_DLFUNC_PTR(DexString, ExtDexFileFreeString);
DEFINE_DLFUNC_PTR(DexFile, ExtDexFileOpenFromMemory);
DEFINE_DLFUNC_PTR(DexFile, ExtDexFileOpenFromFd);
DEFINE_DLFUNC_PTR(DexFile, ExtDexFileGetMethodInfoForOffset);
DEFINE_DLFUNC_PTR(DexFile, ExtDexFileGetAllMethodInfos);
DEFINE_DLFUNC_PTR(DexFile, ExtDexFileFree);
#undef DEFINE_DLFUNC_PTR
void LoadLibdexfileExternal() {
#if defined(STATIC_LIB)
// Nothing to do here since all function pointers are initialised statically.
#elif defined(NO_DEXFILE_SUPPORT)
LOG_FATAL("Dex file support not available.");
#else
static std::once_flag dlopen_once;
std::call_once(dlopen_once, []() {
// Check which version is already loaded to avoid loading both debug and release builds.
// We might also be backtracing from separate process, in which case neither is loaded.
const char* so_name = "libdexfiled_external.so";
void* handle = dlopen(so_name, RTLD_NOLOAD | RTLD_NOW | RTLD_NODELETE);
if (handle == nullptr) {
so_name = "libdexfile_external.so";
handle = dlopen(so_name, RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE);
}
LOG_ALWAYS_FATAL_IF(handle == nullptr, "Failed to load %s: %s", so_name, dlerror());
#define SET_DLFUNC_PTR(CLASS, DLFUNC) \
do { \
CLASS::g_##DLFUNC = reinterpret_cast<decltype(DLFUNC)*>(dlsym(handle, #DLFUNC)); \
LOG_ALWAYS_FATAL_IF(CLASS::g_##DLFUNC == nullptr, \
"Failed to find %s in %s: %s", \
#DLFUNC, \
so_name, \
dlerror()); \
} while (0)
SET_DLFUNC_PTR(DexString, ExtDexFileMakeString);
SET_DLFUNC_PTR(DexString, ExtDexFileGetString);
SET_DLFUNC_PTR(DexString, ExtDexFileFreeString);
SET_DLFUNC_PTR(DexFile, ExtDexFileOpenFromMemory);
SET_DLFUNC_PTR(DexFile, ExtDexFileOpenFromFd);
SET_DLFUNC_PTR(DexFile, ExtDexFileGetMethodInfoForOffset);
SET_DLFUNC_PTR(DexFile, ExtDexFileGetAllMethodInfos);
SET_DLFUNC_PTR(DexFile, ExtDexFileFree);
#undef SET_DLFUNC_PTR
});
#endif // !defined(NO_DEXFILE_SUPPORT) && !defined(STATIC_LIB)
}
DexFile::~DexFile() { g_ExtDexFileFree(ext_dex_file_); }
MethodInfo DexFile::AbsorbMethodInfo(const ExtDexFileMethodInfo& ext_method_info) {
return {ext_method_info.offset, ext_method_info.len, DexString(ext_method_info.name)};
}
void DexFile::AddMethodInfoCallback(const ExtDexFileMethodInfo* ext_method_info, void* ctx) {
auto vect = static_cast<MethodInfoVector*>(ctx);
vect->emplace_back(AbsorbMethodInfo(*ext_method_info));
}
} // namespace dex
} // namespace art_api