platform_system_core/libunwindstack/DexFile.h
David Srbecky 85b5fecec9 Check for data races when reading JIT/DEX entries.
Update the entries only when the list is modified by the runtime.

Check that the list wasn't concurrently modified when being read.

Bug: 124287208
Test: libunwindstack_test
Test: art/test.py -b --host -r -t 137-cfi
Change-Id: I87ba70322053a01b3d5be1fdf6310e1dc21bb084
2019-03-29 14:01:32 +00:00

73 lines
2.1 KiB
C++

/*
* 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.
*/
#ifndef _LIBUNWINDSTACK_DEX_FILE_H
#define _LIBUNWINDSTACK_DEX_FILE_H
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include <art_api/dex_file_support.h>
namespace unwindstack {
class Memory;
struct MapInfo;
class DexFile : protected art_api::dex::DexFile {
public:
virtual ~DexFile() = default;
bool GetFunctionName(uint64_t dex_pc, std::string* method_name, uint64_t* method_offset);
static std::unique_ptr<DexFile> Create(uint64_t dex_file_offset_in_memory, Memory* memory,
MapInfo* info);
protected:
DexFile(art_api::dex::DexFile&& art_dex_file) : art_api::dex::DexFile(std::move(art_dex_file)) {}
uint64_t addr_ = 0;
};
class DexFileFromFile : public DexFile {
public:
static std::unique_ptr<DexFileFromFile> Create(uint64_t dex_file_offset_in_file,
const std::string& file);
private:
DexFileFromFile(art_api::dex::DexFile&& art_dex_file) : DexFile(std::move(art_dex_file)) {}
};
class DexFileFromMemory : public DexFile {
public:
static std::unique_ptr<DexFileFromMemory> Create(uint64_t dex_file_offset_in_memory,
Memory* memory, const std::string& name);
private:
DexFileFromMemory(art_api::dex::DexFile&& art_dex_file, std::vector<uint8_t>&& memory)
: DexFile(std::move(art_dex_file)), memory_(std::move(memory)) {}
std::vector<uint8_t> memory_;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_DEX_FILE_H