c3d79f7c07
When stepping, it's necessary to use both the unaltered relative pc and the adjusted relative pc. If the adjusted pc is not used, the wrong unwind information can be used. Added new offline unit tests that take real data and verifies that it unwinds properly. Fix a bug in the map code that would not properly parse map data for a 64 bit process when done in a 32 bit process. Fix bug in eh_frame processing that didn't adjust the pc correctly. Fix unit tests related to the pc adjustment. Bug: 69475565 Test: Passes libbacktrace/libunwindstack unit tests. Test: Run debuggerd -b on processes on a hikey. Change-Id: Ic501a1c4549c5f61d2742a7105c42a960f2c892b
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 <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(const std::vector<std::string>* initial_map_names_to_skip = nullptr,
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const std::vector<std::string>* map_suffixes_to_ignore = 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 adjusted_rel_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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