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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_SIGNAL_CATCHER_H_
#define ART_RUNTIME_SIGNAL_CATCHER_H_
#include "base/mutex.h"
namespace art {
class Runtime;
class SignalSet;
class Thread;
/*
* A daemon thread that catches signals and does something useful. For
* example, when a SIGQUIT (Ctrl-\) arrives, we suspend and dump the
* status of all threads.
*/
class SignalCatcher {
public:
explicit SignalCatcher(const std::string& stack_trace_file);
~SignalCatcher();
void HandleSigQuit() LOCKS_EXCLUDED(Locks::mutator_lock_,
Locks::thread_list_lock_,
Locks::thread_suspend_count_lock_);
private:
static void* Run(void* arg);
void HandleSigUsr1();
void Output(const std::string& s);
void SetHaltFlag(bool new_value);
bool ShouldHalt();
int WaitForSignal(Thread* self, SignalSet& signals);
std::string stack_trace_file_;
mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
ConditionVariable cond_ GUARDED_BY(lock_);
bool halt_ GUARDED_BY(lock_);
pthread_t pthread_ GUARDED_BY(lock_);
Thread* thread_ GUARDED_BY(lock_);
};
} // namespace art
#endif // ART_RUNTIME_SIGNAL_CATCHER_H_
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