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/*
* 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_LOCAL_UNWINDER_H
#define _LIBUNWINDSTACK_LOCAL_UNWINDER_H
#include <pthread.h>
#include <stdint.h>
#include <sys/types.h>
#include <memory>
#include <string>
#include <vector>
#include <unwindstack/Error.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
namespace unwindstack {
// Forward declarations.
class Elf;
struct MapInfo;
struct LocalFrameData {
LocalFrameData(MapInfo* map_info, uint64_t pc, uint64_t rel_pc, const std::string& function_name,
uint64_t function_offset)
: map_info(map_info),
pc(pc),
rel_pc(rel_pc),
function_name(function_name),
function_offset(function_offset) {}
MapInfo* map_info;
uint64_t pc;
uint64_t rel_pc;
std::string function_name;
uint64_t function_offset;
};
// This is a specialized class that should only be used for doing local unwinds.
// The Unwind call can be made as multiple times on the same object, and it can
// be called by multiple threads at the same time.
// It is designed to be used in debugging circumstances to get a stack trace
// as fast as possible.
class LocalUnwinder {
public:
LocalUnwinder() = default;
LocalUnwinder(const std::vector<std::string>& skip_libraries) : skip_libraries_(skip_libraries) {}
~LocalUnwinder() = default;
bool Init();
bool Unwind(std::vector<LocalFrameData>* frame_info, size_t max_frames);
bool ShouldSkipLibrary(const std::string& map_name);
MapInfo* GetMapInfo(uint64_t pc);
ErrorCode LastErrorCode() { return last_error_.code; }
uint64_t LastErrorAddress() { return last_error_.address; }
private:
pthread_rwlock_t maps_rwlock_;
std::unique_ptr<LocalUpdatableMaps> maps_ = nullptr;
std::shared_ptr<Memory> process_memory_;
std::vector<std::string> skip_libraries_;
ErrorData last_error_;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_LOCAL_UNWINDER_H
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