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Elliott Hughese27955c2011-08-26 15:21:24 -07001/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Brian Carlstromfc0e3212013-07-17 14:40:12 -070017#ifndef ART_RUNTIME_SIGNAL_CATCHER_H_
18#define ART_RUNTIME_SIGNAL_CATCHER_H_
Elliott Hughese27955c2011-08-26 15:21:24 -070019
Elliott Hughes76b61672012-12-12 17:47:30 -080020#include "base/mutex.h"
Elliott Hughese27955c2011-08-26 15:21:24 -070021
22namespace art {
23
24class Runtime;
Elliott Hughes457005c2012-04-16 13:54:25 -070025class SignalSet;
Elliott Hughese27955c2011-08-26 15:21:24 -070026class Thread;
27
28/*
Elliott Hughes8cf5bc02012-02-02 16:32:16 -080029 * A daemon thread that catches signals and does something useful. For
Elliott Hughese27955c2011-08-26 15:21:24 -070030 * example, when a SIGQUIT (Ctrl-\) arrives, we suspend and dump the
31 * status of all threads.
32 */
33class SignalCatcher {
34 public:
Elliott Hughesff17f1f2012-01-24 18:12:29 -080035 explicit SignalCatcher(const std::string& stack_trace_file);
Elliott Hughese27955c2011-08-26 15:21:24 -070036 ~SignalCatcher();
37
Ian Rogersb726dcb2012-09-05 08:57:23 -070038 void HandleSigQuit() LOCKS_EXCLUDED(Locks::mutator_lock_,
39 Locks::thread_list_lock_,
40 Locks::thread_suspend_count_lock_);
Ian Rogers00f7d0e2012-07-19 15:28:27 -070041
Elliott Hughes42ee1422011-09-06 12:33:32 -070042
Elliott Hughese27955c2011-08-26 15:21:24 -070043 private:
44 static void* Run(void* arg);
Elliott Hughese27955c2011-08-26 15:21:24 -070045
Elliott Hughes94ce37a2011-10-18 15:07:48 -070046 void HandleSigUsr1();
47 void Output(const std::string& s);
Elliott Hughes5fe594f2011-09-08 12:33:17 -070048 void SetHaltFlag(bool new_value);
49 bool ShouldHalt();
Elliott Hughesf8349362012-06-18 15:00:06 -070050 int WaitForSignal(Thread* self, SignalSet& signals);
Elliott Hughes5fe594f2011-09-08 12:33:17 -070051
Elliott Hughes94ce37a2011-10-18 15:07:48 -070052 std::string stack_trace_file_;
Elliott Hughesf8349362012-06-18 15:00:06 -070053
Ian Rogersc604d732012-10-14 16:09:54 -070054 mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
55 ConditionVariable cond_ GUARDED_BY(lock_);
Elliott Hughesf8349362012-06-18 15:00:06 -070056 bool halt_ GUARDED_BY(lock_);
57 pthread_t pthread_ GUARDED_BY(lock_);
58 Thread* thread_ GUARDED_BY(lock_);
Elliott Hughese27955c2011-08-26 15:21:24 -070059};
60
61} // namespace art
62
Brian Carlstromfc0e3212013-07-17 14:40:12 -070063#endif // ART_RUNTIME_SIGNAL_CATCHER_H_