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58 lines
1.7 KiB
58 lines
1.7 KiB
4 months ago
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/*
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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_BACKTRACE_CURRENT_H
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#define _LIBBACKTRACE_BACKTRACE_CURRENT_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <backtrace/Backtrace.h>
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// The signal used to cause a thread to dump the stack.
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#if defined(__GLIBC__)
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// In order to run the backtrace_tests on the host, we can't use
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// the internal real time signals used by GLIBC. To avoid this,
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// use SIGRTMIN for the signal to dump the stack.
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#define THREAD_SIGNAL SIGRTMIN
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#else
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#define THREAD_SIGNAL (__SIGRTMIN+1)
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#endif
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class BacktraceMap;
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class BacktraceCurrent : public Backtrace {
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public:
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BacktraceCurrent(pid_t pid, pid_t tid, BacktraceMap* map) : Backtrace(pid, tid, map) {}
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virtual ~BacktraceCurrent() {}
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size_t Read(uint64_t addr, uint8_t* buffer, size_t bytes) override;
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bool ReadWord(uint64_t ptr, word_t* out_value) override;
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bool Unwind(size_t num_ignore_frames, void* ucontext) override;
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protected:
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bool DiscardFrame(const backtrace_frame_data_t& frame);
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private:
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bool UnwindThread(size_t num_ignore_frames);
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virtual bool UnwindFromContext(size_t num_ignore_frames, void* ucontext) = 0;
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};
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#endif // _LIBBACKTRACE_BACKTRACE_CURRENT_H
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