105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/*
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* Copyright (C) 2015 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 _LIBBACKTRACE_UNWIND_OFFLINE_H
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#define _LIBBACKTRACE_UNWIND_OFFLINE_H
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#include <libunwind.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <ucontext.h>
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#include <unordered_map>
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#include <unordered_set>
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#include <backtrace/Backtrace.h>
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struct Space {
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uint64_t start;
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uint64_t end;
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const uint8_t* data;
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Space() {
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Clear();
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}
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void Clear();
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size_t Read(uint64_t addr, uint8_t* buffer, size_t size);
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};
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struct DebugFrameInfo {
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bool is_eh_frame;
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struct EhFrame {
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uint64_t eh_frame_hdr_vaddr;
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uint64_t eh_frame_vaddr;
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uint64_t fde_table_offset_in_eh_frame_hdr;
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std::vector<uint8_t> eh_frame_hdr_data;
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std::vector<uint8_t> eh_frame_data;
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struct ProgramHeader {
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uint64_t vaddr;
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uint64_t file_offset;
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uint64_t file_size;
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};
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std::vector<ProgramHeader> program_headers;
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} eh_frame;
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};
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class BacktraceOffline : public Backtrace {
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public:
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BacktraceOffline(pid_t pid, pid_t tid, BacktraceMap* map, const backtrace_stackinfo_t& stack,
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bool cache_file)
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: Backtrace(pid, tid, map),
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cache_file_(cache_file),
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context_(nullptr),
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last_debug_frame_(nullptr) {
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stack_space_.start = stack.start;
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stack_space_.end = stack.end;
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stack_space_.data = stack.data;
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}
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virtual ~BacktraceOffline() {
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if (last_debug_frame_ != nullptr) {
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delete last_debug_frame_;
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}
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}
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bool Unwind(size_t num_ignore_frames, ucontext_t* context) override;
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bool ReadWord(uintptr_t ptr, word_t* out_value) override;
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size_t Read(uintptr_t addr, uint8_t* buffer, size_t bytes) override;
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bool FindProcInfo(unw_addr_space_t addr_space, uint64_t ip, unw_proc_info_t* proc_info,
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int need_unwind_info);
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bool ReadReg(size_t reg_index, uint64_t* value);
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protected:
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std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) override;
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DebugFrameInfo* GetDebugFrameInFile(const std::string& filename);
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static std::unordered_map<std::string, std::unique_ptr<DebugFrameInfo>> debug_frames_;
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static std::unordered_set<std::string> debug_frame_missing_files_;
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bool cache_file_;
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ucontext_t* context_;
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Space eh_frame_hdr_space_;
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Space eh_frame_space_;
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Space stack_space_;
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DebugFrameInfo* last_debug_frame_;
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};
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#endif // _LIBBACKTRACE_BACKTRACE_OFFLINE_H
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