1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _LIBBACKTRACE_UNWIND_OFFLINE_H 18 #define _LIBBACKTRACE_UNWIND_OFFLINE_H 19 20 #include <libunwind.h> 21 #include <stdint.h> 22 #include <sys/types.h> 23 #include <ucontext.h> 24 25 #include <unordered_map> 26 #include <unordered_set> 27 28 #include <backtrace/Backtrace.h> 29 30 struct Space { 31 uint64_t start; 32 uint64_t end; 33 const uint8_t* data; 34 35 Space() { 36 Clear(); 37 } 38 39 void Clear(); 40 size_t Read(uint64_t addr, uint8_t* buffer, size_t size); 41 }; 42 43 struct DebugFrameInfo; 44 45 class BacktraceOffline : public Backtrace { 46 public: 47 BacktraceOffline(pid_t pid, pid_t tid, BacktraceMap* map, const backtrace_stackinfo_t& stack, 48 bool cache_file) 49 : Backtrace(pid, tid, map), 50 cache_file_(cache_file), 51 context_(nullptr) { 52 stack_space_.start = stack.start; 53 stack_space_.end = stack.end; 54 stack_space_.data = stack.data; 55 } 56 57 virtual ~BacktraceOffline() = default; 58 59 bool Unwind(size_t num_ignore_frames, ucontext_t* context) override; 60 61 bool ReadWord(uintptr_t ptr, word_t* out_value) override; 62 63 size_t Read(uintptr_t addr, uint8_t* buffer, size_t bytes) override; 64 65 bool FindProcInfo(unw_addr_space_t addr_space, uint64_t ip, unw_proc_info_t* proc_info, 66 int need_unwind_info); 67 68 bool ReadReg(size_t reg_index, uint64_t* value); 69 70 protected: 71 std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) override; 72 DebugFrameInfo* GetDebugFrameInFile(const std::string& filename); 73 74 bool cache_file_; 75 ucontext_t* context_; 76 Space eh_frame_hdr_space_; 77 Space eh_frame_space_; 78 Space arm_extab_space_; 79 Space arm_exidx_space_; 80 Space stack_space_; 81 }; 82 83 #endif // _LIBBACKTRACE_BACKTRACE_OFFLINE_H 84
