87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
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/*
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* Copyright (C) 2018 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_LOCAL_UNWINDER_H
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#define _LIBUNWINDSTACK_LOCAL_UNWINDER_H
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#include <pthread.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/Error.h>
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#include <unwindstack/Maps.h>
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#include <unwindstack/Memory.h>
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namespace unwindstack {
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// Forward declarations.
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class Elf;
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struct MapInfo;
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struct LocalFrameData {
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LocalFrameData(MapInfo* map_info, uint64_t pc, uint64_t rel_pc, const std::string& function_name,
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uint64_t function_offset)
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: map_info(map_info),
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pc(pc),
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rel_pc(rel_pc),
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function_name(function_name),
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function_offset(function_offset) {}
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MapInfo* map_info;
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uint64_t pc;
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uint64_t rel_pc;
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std::string function_name;
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uint64_t function_offset;
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};
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// This is a specialized class that should only be used for doing local unwinds.
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// The Unwind call can be made as multiple times on the same object, and it can
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// be called by multiple threads at the same time.
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// It is designed to be used in debugging circumstances to get a stack trace
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// as fast as possible.
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class LocalUnwinder {
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public:
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LocalUnwinder() = default;
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LocalUnwinder(const std::vector<std::string>& skip_libraries) : skip_libraries_(skip_libraries) {}
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~LocalUnwinder() = default;
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bool Init();
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bool Unwind(std::vector<LocalFrameData>* frame_info, size_t max_frames);
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bool ShouldSkipLibrary(const std::string& map_name);
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MapInfo* GetMapInfo(uint64_t pc);
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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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private:
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pthread_rwlock_t maps_rwlock_;
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std::unique_ptr<LocalUpdatableMaps> maps_ = nullptr;
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std::shared_ptr<Memory> process_memory_;
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std::vector<std::string> skip_libraries_;
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ErrorData last_error_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_LOCAL_UNWINDER_H
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