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63 lines
1.8 KiB
63 lines
1.8 KiB
/*
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* Copyright (C) 2008 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 ART_RUNTIME_SIGNAL_CATCHER_H_
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#define ART_RUNTIME_SIGNAL_CATCHER_H_
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#include "android-base/unique_fd.h"
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#include "base/mutex.h"
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namespace art {
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class Runtime;
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class SignalSet;
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class Thread;
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/*
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* A daemon thread that catches signals and does something useful. For
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* example, when a SIGQUIT (Ctrl-\) arrives, we suspend and dump the
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* status of all threads.
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*/
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class SignalCatcher {
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public:
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SignalCatcher();
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~SignalCatcher();
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void HandleSigQuit() REQUIRES(!Locks::mutator_lock_, !Locks::thread_list_lock_,
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!Locks::thread_suspend_count_lock_);
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private:
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// NO_THREAD_SAFETY_ANALYSIS for static function calling into member function with excludes lock.
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static void* Run(void* arg) NO_THREAD_SAFETY_ANALYSIS;
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void HandleSigUsr1();
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void Output(const std::string& s);
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void SetHaltFlag(bool new_value) REQUIRES(!lock_);
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bool ShouldHalt() REQUIRES(!lock_);
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int WaitForSignal(Thread* self, SignalSet& signals) REQUIRES(!lock_);
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mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
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ConditionVariable cond_ GUARDED_BY(lock_);
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bool halt_ GUARDED_BY(lock_);
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pthread_t pthread_ GUARDED_BY(lock_);
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Thread* thread_ GUARDED_BY(lock_);
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};
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} // namespace art
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#endif // ART_RUNTIME_SIGNAL_CATCHER_H_
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