3841accba8
Add test and benchmark. Also switch libbacktrace, libunwindstack, libmemunreachable to use libprocinfo for map file reading. The benchmark shows using libprocinfo speeds up map file reading in libbacktrace and libunwindstack 18% - 36% on walleye. Bug: http://b/79118393 Test: run procinfo_test. Test: run libunwindstack_test. Test: run libbacktrace_test. Test: run memunreachable_test. Change-Id: Icf281c352f4103fc8d4ba6732c5c07b943330ca1
86 lines
2.5 KiB
C++
86 lines
2.5 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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namespace unwindstack {
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// Forward declarations.
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class Memory;
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struct MapInfo {
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MapInfo() = default;
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MapInfo(uint64_t start, uint64_t end) : start(start), end(end) {}
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MapInfo(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags, 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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load_bias(static_cast<uint64_t>(-1)) {}
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MapInfo(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags, 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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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. This indicates that the
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// entire file is represented by the Memory object returned by CreateMemory,
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// instead of a portion of the file.
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uint64_t elf_offset = 0;
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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, bool init_gnu_debugdata = false);
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uint64_t GetLoadBias(const std::shared_ptr<Memory>& process_memory);
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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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Memory* CreateMemory(const std::shared_ptr<Memory>& process_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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