4aec66e810
Actually make the destructor virtual so that objects in UnwinderFromPid get freed. Also, explicitly make the DexFiles and JitDebug destructors virtual. Bug: 123099840 Test: Ran UnwindTest.local_from_pid thousands of times. Change-Id: I8bf11c0eb3587fa82f5f14f4723ea5c91da0fd46
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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virtual ~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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virtual ~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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