7add50d820
libmemunreachable uses an imprecise mark and sweep pass over all memory
allocated by jemalloc in order to find unreachable allocations.
Bug: 27208635
Change-Id: Ia70bbf31f5b40ff71dab28cfd6cd06c5ef01a2d4
(cherry picked from commit bcb4ed3eaa)
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright (C) 2016 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 LIBMEMUNREACHABLE_PTRACER_THREAD_H_
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#define LIBMEMUNREACHABLE_PTRACER_THREAD_H_
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#include <functional>
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#include <mutex>
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#include "android-base/macros.h"
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#include "Allocator.h"
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class Stack;
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// PtracerThread is similar to std::thread, except that it creates a "thread"
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// that can ptrace the other threads. The thread is actually a separate
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// process, with its own thread group, but shares address space and fds with
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// the parent.
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class PtracerThread {
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public:
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PtracerThread(const std::function<int()>& func);
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~PtracerThread();
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bool Start();
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int Join();
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private:
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void SetTracer(pid_t);
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void ClearTracer();
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void Kill();
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DISALLOW_COPY_AND_ASSIGN(PtracerThread);
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std::unique_ptr<Stack> stack_;
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std::function<int()> func_;
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std::mutex m_;
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pid_t child_pid_;
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};
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#endif // LIBMEMUNREACHABLE_PTRACER_THREAD_H_
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