a2ec50bf57
This cleans up a bit of the Unwinder code to make it clear what's going on. Modify the offline unit tests to verify the pc and sp to make sure that those values get computed correctly. Test: Passes unit tests. Test: Passes 137-cfi art tests. Change-Id: I0787a1d77b8726d3defd08f31c7476f6798f8d0d
109 lines
3 KiB
C++
109 lines
3 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/Error.h>
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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 DexFiles;
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class Elf;
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class JitDebug;
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enum ArchEnum : uint8_t;
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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 = 0;
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std::string map_name;
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uint64_t map_offset = 0;
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uint64_t map_start = 0;
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uint64_t map_end = 0;
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uint64_t map_load_bias = 0;
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int map_flags = 0;
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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 is32bit);
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void SetJitDebug(JitDebug* jit_debug, ArchEnum arch);
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// Disabling the resolving of names results in the function name being
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// set to an empty string and the function offset being set to zero.
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void SetResolveNames(bool resolve) { resolve_names_ = resolve; }
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#if !defined(NO_LIBDEXFILE_SUPPORT)
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void SetDexFiles(DexFiles* dex_files, ArchEnum arch);
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#endif
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ErrorCode LastErrorCode() { return last_error_.code; }
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uint64_t LastErrorAddress() { return last_error_.address; }
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private:
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void FillInDexFrame();
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void FillInFrame(MapInfo* map_info, Elf* elf, uint64_t rel_pc, uint64_t func_pc,
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uint64_t pc_adjustment);
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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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JitDebug* jit_debug_ = nullptr;
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#if !defined(NO_LIBDEXFILE_SUPPORT)
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DexFiles* dex_files_ = nullptr;
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#endif
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bool resolve_names_ = true;
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ErrorData last_error_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_UNWINDER_H
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