93 lines
3.4 KiB
C++
93 lines
3.4 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 "read_dex_file.h"
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#include <fcntl.h>
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#include <algorithm>
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#include <iterator>
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#include <string>
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#include <utility>
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#include <vector>
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#include <android-base/logging.h>
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#include <android-base/mapped_file.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 "utils.h"
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namespace simpleperf {
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static void ReadSymbols(art_api::dex::DexFile& dex_file, uint64_t file_offset,
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const std::function<void(DexFileSymbol*)>& symbol_cb) {
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auto callback = [&](const art_api::dex::DexFile::Method& method) {
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size_t name_size, code_size;
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const char* name = method.GetQualifiedName(/*with_params=*/false, &name_size);
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size_t offset = method.GetCodeOffset(&code_size);
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DexFileSymbol symbol{std::string_view(name, name_size), file_offset + offset, code_size};
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symbol_cb(&symbol);
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};
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dex_file.ForEachMethod(callback);
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}
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bool ReadSymbolsFromDexFileInMemory(void* addr, uint64_t size, const std::string& debug_filename,
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const std::vector<uint64_t>& dex_file_offsets,
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const std::function<void(DexFileSymbol*)>& symbol_callback) {
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for (uint64_t file_offset : dex_file_offsets) {
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size_t max_file_size;
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if (__builtin_sub_overflow(size, file_offset, &max_file_size)) {
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LOG(WARNING) << "failed to read dex file symbols from " << debug_filename << "(offset "
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<< file_offset << ")";
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return false;
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}
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uint8_t* file_addr = static_cast<uint8_t*>(addr) + file_offset;
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std::unique_ptr<art_api::dex::DexFile> dex_file;
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art_api::dex::DexFile::Error error_msg =
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art_api::dex::DexFile::Create(file_addr, max_file_size, nullptr, "", &dex_file);
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if (dex_file == nullptr) {
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LOG(WARNING) << "failed to read dex file symbols from " << debug_filename << "(offset "
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<< file_offset << "): " << error_msg.ToString();
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return false;
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}
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ReadSymbols(*dex_file, file_offset, symbol_callback);
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}
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return true;
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}
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bool ReadSymbolsFromDexFile(const std::string& file_path,
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const std::vector<uint64_t>& dex_file_offsets,
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const std::function<void(DexFileSymbol*)>& symbol_callback) {
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android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file_path.c_str(), O_RDONLY | O_CLOEXEC)));
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if (fd == -1) {
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return false;
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}
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size_t file_size = GetFileSize(file_path);
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if (file_size == 0) {
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return false;
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}
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std::unique_ptr<android::base::MappedFile> map;
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map = android::base::MappedFile::FromFd(fd, 0, file_size, PROT_READ);
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if (map == nullptr) {
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return false;
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}
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return ReadSymbolsFromDexFileInMemory(map->data(), file_size, file_path, dex_file_offsets,
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symbol_callback);
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}
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} // namespace simpleperf
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