f6f691b63c
Changes: - Remove unused GetReturnAddressFromDefault function and tests. - Modify the unwinder to stop when a pc/sp in a device map. - Modify the unwinder to skip initial frames based on map names. - Unit tests that exercise all of the paths in the unwinder code. - Move the test Elf/ElfInterface objects into their own file. - Update RegsFake to handle extra cases. - Modify libbacktrace code to use this unwinder. The new unwinder does not implement the ignore frame functionality since this is not used very often and is better implemented using a skip frames in named libraries functionality. Test: Ran new unit tests, ran backtrace tests. Change-Id: Ifd65e9acd66ac5e2d0e04bd32a9ad870b54610ff
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
/*
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* Copyright (C) 2017 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_UNWINDER_H
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#define _LIBUNWINDSTACK_UNWINDER_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <memory>
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#include <set>
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#include <string>
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#include <vector>
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#include <unwindstack/Maps.h>
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#include <unwindstack/Memory.h>
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#include <unwindstack/Regs.h>
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namespace unwindstack {
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// Forward declarations.
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class Elf;
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struct FrameData {
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size_t num;
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uint64_t rel_pc;
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uint64_t pc;
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uint64_t sp;
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std::string function_name;
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uint64_t function_offset;
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std::string map_name;
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uint64_t map_offset;
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uint64_t map_start;
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uint64_t map_end;
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uint64_t map_load_bias;
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int map_flags;
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};
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class Unwinder {
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public:
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Unwinder(size_t max_frames, Maps* maps, Regs* regs, std::shared_ptr<Memory> process_memory)
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: max_frames_(max_frames), maps_(maps), regs_(regs), process_memory_(process_memory) {
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frames_.reserve(max_frames);
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}
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~Unwinder() = default;
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void Unwind(std::set<std::string>* initial_map_names_to_skip = nullptr);
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size_t NumFrames() { return frames_.size(); }
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const std::vector<FrameData>& frames() { return frames_; }
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std::string FormatFrame(size_t frame_num);
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static std::string FormatFrame(const FrameData& frame, bool bits32);
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private:
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void FillInFrame(MapInfo* map_info, Elf* elf, uint64_t rel_pc, bool adjust_pc);
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size_t max_frames_;
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Maps* maps_;
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Regs* regs_;
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std::vector<FrameData> frames_;
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std::shared_ptr<Memory> process_memory_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_UNWINDER_H
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