eb0772ff4a
This object is able to be easily used from other code and can be used to replace the libbacktrace calls in other parts of the platform. Also, demangle the function names when calling FormatFrame. Bug: 120606663 Test: Unit tests pass, debuggerd using this code directly passes unit Test: tests. Change-Id: Ifd8cf9bdd89174c1736810711d20e9f37f29b1bf
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016 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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#ifndef _LIBUNWINDSTACK_MAP_INFO_H
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#define _LIBUNWINDSTACK_MAP_INFO_H
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#include <stdint.h>
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#include <atomic>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <unwindstack/Elf.h>
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#include <unwindstack/Memory.h>
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namespace unwindstack {
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struct MapInfo {
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MapInfo(MapInfo* map_info, uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
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const char* name)
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: start(start),
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end(end),
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offset(offset),
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flags(flags),
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name(name),
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prev_map(map_info),
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load_bias(static_cast<uint64_t>(-1)) {}
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MapInfo(MapInfo* map_info, uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
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const std::string& name)
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: start(start),
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end(end),
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offset(offset),
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flags(flags),
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name(name),
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prev_map(map_info),
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load_bias(static_cast<uint64_t>(-1)) {}
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~MapInfo() = default;
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uint64_t start = 0;
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uint64_t end = 0;
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uint64_t offset = 0;
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uint16_t flags = 0;
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std::string name;
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std::shared_ptr<Elf> elf;
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// This value is only non-zero if the offset is non-zero but there is
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// no elf signature found at that offset.
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uint64_t elf_offset = 0;
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// This value is the offset from the map in memory that is the start
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// of the elf. This is not equal to offset when the linker splits
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// shared libraries into a read-only and read-execute map.
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uint64_t elf_start_offset = 0;
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MapInfo* prev_map = nullptr;
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std::atomic_uint64_t load_bias;
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// This function guarantees it will never return nullptr.
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Elf* GetElf(const std::shared_ptr<Memory>& process_memory, ArchEnum expected_arch);
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uint64_t GetLoadBias(const std::shared_ptr<Memory>& process_memory);
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Memory* CreateMemory(const std::shared_ptr<Memory>& process_memory);
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bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
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private:
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MapInfo(const MapInfo&) = delete;
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void operator=(const MapInfo&) = delete;
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Memory* GetFileMemory();
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bool InitFileMemoryFromPreviousReadOnlyMap(MemoryFileAtOffset* memory);
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// Protect the creation of the elf object.
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std::mutex mutex_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_MAP_INFO_H
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