9062bb4269
libunwindstack may be used in situations where we cannot guarantee that libdexfile_external.so is available, e.g. from libc_malloc_debug.so in the bootstrap Bionic, or in APEXes with incomplete linker configs. Test: atest libunwindstack_unit_test Test: atest --host libunwindstack_unit_test Test: rm -f out/host/linux-x86/lib*/libdexfile_external.so && \ out/host/linux-x86/nativetest64/libunwindstack_unit_test/libunwindstack_unit_test (check that DexFile(s)Test tests fail without abort) Bug; 139408016 Change-Id: I7eeee77ab363d9d39412ece2038ce786394bb34f
126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/*
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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 <stdint.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <memory>
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#define LOG_TAG "unwind"
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#include <log/log.h>
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#include <android-base/unique_fd.h>
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#include <art_api/dex_file_support.h>
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#include <unwindstack/MapInfo.h>
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#include <unwindstack/Memory.h>
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#include "DexFile.h"
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namespace unwindstack {
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static bool CheckDexSupport() {
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if (std::string err_msg; !art_api::dex::TryLoadLibdexfileExternal(&err_msg)) {
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ALOGW("Failed to initialize DEX file support: %s", err_msg.c_str());
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return false;
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}
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return true;
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}
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static bool HasDexSupport() {
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static bool has_dex_support = CheckDexSupport();
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return has_dex_support;
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}
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std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
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MapInfo* info) {
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if (!info->name.empty()) {
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std::unique_ptr<DexFile> dex_file =
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DexFileFromFile::Create(dex_file_offset_in_memory - info->start + info->offset, info->name);
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if (dex_file) {
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return dex_file;
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}
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}
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return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name);
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}
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bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name,
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uint64_t* method_offset) {
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art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset, false);
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if (method_info.offset == 0) {
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return false;
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}
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*method_name = method_info.name;
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*method_offset = dex_offset - method_info.offset;
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return true;
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}
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std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
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const std::string& file) {
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if (UNLIKELY(!HasDexSupport())) {
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return nullptr;
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}
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android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
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if (fd == -1) {
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return nullptr;
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}
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std::string error_msg;
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std::unique_ptr<art_api::dex::DexFile> art_dex_file =
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OpenFromFd(fd, dex_file_offset_in_file, file, &error_msg);
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if (art_dex_file == nullptr) {
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return nullptr;
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}
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return std::unique_ptr<DexFileFromFile>(new DexFileFromFile(std::move(*art_dex_file.release())));
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}
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std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
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Memory* memory,
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const std::string& name) {
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if (UNLIKELY(!HasDexSupport())) {
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return nullptr;
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}
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std::vector<uint8_t> backing_memory;
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for (size_t size = 0;;) {
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std::string error_msg;
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std::unique_ptr<art_api::dex::DexFile> art_dex_file =
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OpenFromMemory(backing_memory.data(), &size, name, &error_msg);
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if (art_dex_file != nullptr) {
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return std::unique_ptr<DexFileFromMemory>(
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new DexFileFromMemory(std::move(*art_dex_file.release()), std::move(backing_memory)));
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}
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if (!error_msg.empty()) {
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return nullptr;
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}
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backing_memory.resize(size);
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if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(),
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backing_memory.size())) {
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return nullptr;
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}
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}
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}
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} // namespace unwindstack
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