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
142 lines
4.2 KiB
C++
142 lines
4.2 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/DexFiles.h>
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#include <unwindstack/Error.h>
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#include <unwindstack/JitDebug.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 Elf;
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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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// The offset from the first map representing the frame. When there are
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// two maps (read-only and read-execute) this will be the offset from
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// the read-only map. When there is only one map, this will be the
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// same as the actual offset of the map and match map_exact_offset.
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uint64_t map_elf_start_offset = 0;
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// The actual offset from the map where the pc lies.
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uint64_t map_exact_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(size_t max_frames, Maps* maps, std::shared_ptr<Memory> process_memory)
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: max_frames_(max_frames), maps_(maps), 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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void SetRegs(Regs* regs) { regs_ = regs; }
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Maps* GetMaps() { return maps_; }
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std::shared_ptr<Memory>& GetProcessMemory() { return process_memory_; }
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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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protected:
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Unwinder(size_t max_frames) : max_frames_(max_frames) { frames_.reserve(max_frames); }
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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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class UnwinderFromPid : public Unwinder {
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public:
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UnwinderFromPid(size_t max_frames, pid_t pid) : Unwinder(max_frames), pid_(pid) {}
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~UnwinderFromPid() = default;
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bool Init(ArchEnum arch);
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private:
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pid_t pid_;
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std::unique_ptr<Maps> maps_ptr_;
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std::unique_ptr<JitDebug> jit_debug_ptr_;
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#if !defined(NO_LIBDEXFILE_SUPPORT)
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std::unique_ptr<DexFiles> dex_files_ptr_;
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#endif
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_UNWINDER_H
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