a2efd3ac7a
This new version doesn't require any specialized thread implementation, it uses the Current implementation to do its job. In addition, it runs much faster when multiple threads are trying to unwind at the same time since the global signal lock is held for only a small amount of time. Even running through the threads one at a time should be faster since it no longer requires two passes through the unwound stacks. The new code now allows multiple simultaneous unwinds of the same thread. Finally, add the ability to unwind from a ucontext_t passed in. This functionality doesn't work for remote unwinds yet. Change-Id: I4d181d7ca5ffd2acfd1686e668e6d21e36b425cb
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
/*
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* Copyright (C) 2013 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_CURRENT_H
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#define _LIBBACKTRACE_UNWIND_CURRENT_H
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#include <string>
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#include "BacktraceImpl.h"
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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class UnwindCurrent : public BacktraceImpl {
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public:
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UnwindCurrent();
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virtual ~UnwindCurrent();
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virtual bool Unwind(size_t num_ignore_frames, ucontext_t* ucontext);
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virtual std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset);
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bool UnwindFromContext(size_t num_ignore_frames, bool within_handler);
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void GetUnwContextFromUcontext(const ucontext_t* context);
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protected:
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unw_context_t context_;
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};
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#endif // _LIBBACKTRACE_UNWIND_CURRENT_H
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