5d991bc351
1. Read .ARM.exidx and .ARM.extab, provides these data to libunwind through AccessMem. 2. In FindProcInfo, search .ARM.exidx for the idx entry of function containing ip. 3. Add structures to store .ARM.exidx info in DebugFrameInfo, and clean up the structure. 4. Add tests to test each unwind information (.eh_frame, .debug_frame, .gnu_debugdata, .ARM.exidx) separately. Bug: http://b/30974693 Test: run backtrace_test. Test: run simpleperf runtest.py. Change-Id: I9377a54379158bd35860efcf0e011423be7350d4
83 lines
2.2 KiB
C++
83 lines
2.2 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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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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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() = default;
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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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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 arm_extab_space_;
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Space arm_exidx_space_;
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Space stack_space_;
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};
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#endif // _LIBBACKTRACE_BACKTRACE_OFFLINE_H
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