602b88ccdd
For non-zygote spawned processes, we might want to dump the backtrace data. Provide a method to send a signal to a process and then dump the data to a file. Adds a method to dump the backtrace data on exit. Update documentation and explain format of heap dump data. Test: Ran unit tests, enabled new options and used them. Change-Id: Ie2fa706694160731afe02c1382b037d06df1d069
71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef DEBUG_MALLOC_BACKTRACEDATA_H
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#define DEBUG_MALLOC_BACKTRACEDATA_H
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#include <stdint.h>
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#include <atomic>
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#include <private/bionic_macros.h>
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#include "OptionData.h"
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// Forward declarations.
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class Config;
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class BacktraceData : public OptionData {
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public:
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BacktraceData(DebugData* debug_data, const Config& config, size_t* offset);
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virtual ~BacktraceData() = default;
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bool Initialize(const Config& config);
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inline size_t alloc_offset() { return alloc_offset_; }
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bool ShouldBacktrace() { return enabled_ == 1; }
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void ToggleBacktraceEnabled() { enabled_.fetch_xor(1); }
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void EnableDumping() { dump_ = true; }
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bool ShouldDumpAndReset() {
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bool expected = true;
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return dump_.compare_exchange_strong(expected, false);
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}
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private:
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size_t alloc_offset_ = 0;
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std::atomic_uint8_t enabled_;
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std::atomic_bool dump_;
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DISALLOW_COPY_AND_ASSIGN(BacktraceData);
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};
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#endif // DEBUG_MALLOC_BACKTRACEDATA_H
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