Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 17 | #ifndef ART_RUNTIME_THREAD_LIST_H_ |
| 18 | #define ART_RUNTIME_THREAD_LIST_H_ |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 19 | |
Mathieu Chartier | 70a596d | 2014-12-17 14:56:47 -0800 | [diff] [blame] | 20 | #include "base/histogram.h" |
Elliott Hughes | 76b6167 | 2012-12-12 17:47:30 -0800 | [diff] [blame] | 21 | #include "base/mutex.h" |
Mathieu Chartier | e34fa1d | 2015-01-14 14:55:47 -0800 | [diff] [blame] | 22 | #include "gc_root.h" |
Ian Rogers | d9c4fc9 | 2013-10-01 19:45:43 -0700 | [diff] [blame] | 23 | #include "jni.h" |
Mathieu Chartier | 83c8ee0 | 2014-01-28 14:50:23 -0800 | [diff] [blame] | 24 | #include "object_callbacks.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 25 | |
| 26 | #include <bitset> |
| 27 | #include <list> |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 28 | |
| 29 | namespace art { |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 30 | class Closure; |
| 31 | class Thread; |
Mathieu Chartier | 7664f5c | 2012-06-08 18:15:32 -0700 | [diff] [blame] | 32 | class TimingLogger; |
| 33 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 34 | class ThreadList { |
| 35 | public: |
| 36 | static const uint32_t kMaxThreadId = 0xFFFF; |
Ian Rogers | d9c4fc9 | 2013-10-01 19:45:43 -0700 | [diff] [blame] | 37 | static const uint32_t kInvalidThreadId = 0; |
| 38 | static const uint32_t kMainThreadId = 1; |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 39 | |
Elliott Hughes | 4dd9b4d | 2011-12-12 18:29:24 -0800 | [diff] [blame] | 40 | explicit ThreadList(); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 41 | ~ThreadList(); |
| 42 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 43 | void DumpForSigQuit(std::ostream& os) |
Mathieu Chartier | 70a596d | 2014-12-17 14:56:47 -0800 | [diff] [blame] | 44 | LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::mutator_lock_); |
Ian Rogers | 7b078e8 | 2014-09-10 14:44:24 -0700 | [diff] [blame] | 45 | // For thread suspend timeout dumps. |
| 46 | void Dump(std::ostream& os) |
Mathieu Chartier | 70a596d | 2014-12-17 14:56:47 -0800 | [diff] [blame] | 47 | LOCKS_EXCLUDED(Locks::thread_list_lock_, Locks::thread_suspend_count_lock_); |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 48 | pid_t GetLockOwner(); // For SignalCatcher. |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 49 | |
Elliott Hughes | 8d768a9 | 2011-09-14 16:35:25 -0700 | [diff] [blame] | 50 | // Thread suspension support. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 51 | void ResumeAll() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 52 | UNLOCK_FUNCTION(Locks::mutator_lock_) |
| 53 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 54 | Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 55 | void Resume(Thread* thread, bool for_debugger = false) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 56 | LOCKS_EXCLUDED(Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 57 | |
| 58 | // Suspends all threads and gets exclusive access to the mutator_lock_. |
| 59 | void SuspendAll() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 60 | EXCLUSIVE_LOCK_FUNCTION(Locks::mutator_lock_) |
| 61 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 62 | Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 63 | |
Ian Rogers | d9c4fc9 | 2013-10-01 19:45:43 -0700 | [diff] [blame] | 64 | |
| 65 | // Suspend a thread using a peer, typically used by the debugger. Returns the thread on success, |
| 66 | // else NULL. The peer is used to identify the thread to avoid races with the thread terminating. |
| 67 | // If the thread should be suspended then value of request_suspension should be true otherwise |
| 68 | // the routine will wait for a previous suspend request. If the suspension times out then *timeout |
| 69 | // is set to true. |
Brian Carlstrom | ba32de4 | 2014-08-27 23:43:46 -0700 | [diff] [blame] | 70 | Thread* SuspendThreadByPeer(jobject peer, bool request_suspension, bool debug_suspension, |
| 71 | bool* timed_out) |
Ian Rogers | d9c4fc9 | 2013-10-01 19:45:43 -0700 | [diff] [blame] | 72 | LOCKS_EXCLUDED(Locks::mutator_lock_, |
| 73 | Locks::thread_list_lock_, |
| 74 | Locks::thread_suspend_count_lock_); |
| 75 | |
| 76 | // Suspend a thread using its thread id, typically used by lock/monitor inflation. Returns the |
| 77 | // thread on success else NULL. The thread id is used to identify the thread to avoid races with |
| 78 | // the thread terminating. Note that as thread ids are recycled this may not suspend the expected |
| 79 | // thread, that may be terminating. If the suspension times out then *timeout is set to true. |
| 80 | Thread* SuspendThreadByThreadId(uint32_t thread_id, bool debug_suspension, bool* timed_out) |
| 81 | LOCKS_EXCLUDED(Locks::mutator_lock_, |
| 82 | Locks::thread_list_lock_, |
| 83 | Locks::thread_suspend_count_lock_); |
| 84 | |
| 85 | // Find an already suspended thread (or self) by its id. |
| 86 | Thread* FindThreadByThreadId(uint32_t thin_lock_id); |
| 87 | |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 88 | // Run a checkpoint on threads, running threads are not suspended but run the checkpoint inside |
| 89 | // of the suspend check. Returns how many checkpoints we should expect to run. |
Ian Rogers | 719d1a3 | 2014-03-06 12:13:39 -0800 | [diff] [blame] | 90 | size_t RunCheckpoint(Closure* checkpoint_function) |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 91 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 92 | Locks::thread_suspend_count_lock_); |
| 93 | |
Ian Rogers | a03de6d | 2014-03-08 23:37:07 +0000 | [diff] [blame] | 94 | size_t RunCheckpointOnRunnableThreads(Closure* checkpoint_function) |
Ian Rogers | 7b078e8 | 2014-09-10 14:44:24 -0700 | [diff] [blame] | 95 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 96 | Locks::thread_suspend_count_lock_); |
Dave Allison | 39c3bfb | 2014-01-28 18:33:52 -0800 | [diff] [blame] | 97 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 98 | // Suspends all threads |
| 99 | void SuspendAllForDebugger() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 100 | LOCKS_EXCLUDED(Locks::mutator_lock_, |
| 101 | Locks::thread_list_lock_, |
| 102 | Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 103 | |
| 104 | void SuspendSelfForDebugger() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 105 | LOCKS_EXCLUDED(Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 106 | |
Sebastien Hertz | 253fa55 | 2014-10-14 17:27:15 +0200 | [diff] [blame] | 107 | // Resume all threads |
| 108 | void ResumeAllForDebugger() |
| 109 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 110 | Locks::thread_suspend_count_lock_); |
| 111 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 112 | void UndoDebuggerSuspensions() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 113 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 114 | Locks::thread_suspend_count_lock_); |
Elliott Hughes | 8d768a9 | 2011-09-14 16:35:25 -0700 | [diff] [blame] | 115 | |
Elliott Hughes | f834936 | 2012-06-18 15:00:06 -0700 | [diff] [blame] | 116 | // Iterates over all the threads. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 117 | void ForEach(void (*callback)(Thread*, void*), void* context) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 118 | EXCLUSIVE_LOCKS_REQUIRED(Locks::thread_list_lock_); |
Elliott Hughes | 47fce01 | 2011-10-25 18:37:19 -0700 | [diff] [blame] | 119 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 120 | // Add/remove current thread from list. |
| 121 | void Register(Thread* self) |
Ian Rogers | 120f1c7 | 2012-09-28 17:17:10 -0700 | [diff] [blame] | 122 | EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) |
| 123 | LOCKS_EXCLUDED(Locks::mutator_lock_, Locks::thread_list_lock_); |
| 124 | void Unregister(Thread* self) LOCKS_EXCLUDED(Locks::mutator_lock_, Locks::thread_list_lock_); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 125 | |
Mathieu Chartier | 83c8ee0 | 2014-01-28 14:50:23 -0800 | [diff] [blame] | 126 | void VisitRoots(RootCallback* callback, void* arg) const |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 127 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 128 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 129 | // Return a copy of the thread list. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 130 | std::list<Thread*> GetList() EXCLUSIVE_LOCKS_REQUIRED(Locks::thread_list_lock_) { |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 131 | return list_; |
| 132 | } |
Elliott Hughes | 93e74e8 | 2011-09-13 11:07:03 -0700 | [diff] [blame] | 133 | |
Mathieu Chartier | 590fee9 | 2013-09-13 13:46:47 -0700 | [diff] [blame] | 134 | void DumpNativeStacks(std::ostream& os) |
| 135 | LOCKS_EXCLUDED(Locks::thread_list_lock_); |
| 136 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 137 | private: |
Ian Rogers | cfaa455 | 2012-11-26 21:00:08 -0800 | [diff] [blame] | 138 | uint32_t AllocThreadId(Thread* self); |
Chao-ying Fu | 9e36931 | 2014-05-21 11:20:52 -0700 | [diff] [blame] | 139 | void ReleaseThreadId(Thread* self, uint32_t id) LOCKS_EXCLUDED(Locks::allocated_thread_ids_lock_); |
Elliott Hughes | e52e49b | 2012-04-02 16:05:44 -0700 | [diff] [blame] | 140 | |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 141 | bool Contains(Thread* thread) EXCLUSIVE_LOCKS_REQUIRED(Locks::thread_list_lock_); |
| 142 | bool Contains(pid_t tid) EXCLUSIVE_LOCKS_REQUIRED(Locks::thread_list_lock_); |
Elliott Hughes | abbe07d | 2012-06-05 17:42:23 -0700 | [diff] [blame] | 143 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 144 | void DumpUnattachedThreads(std::ostream& os) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 145 | LOCKS_EXCLUDED(Locks::thread_list_lock_); |
Elliott Hughes | e52e49b | 2012-04-02 16:05:44 -0700 | [diff] [blame] | 146 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 147 | void SuspendAllDaemonThreads() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 148 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 149 | Locks::thread_suspend_count_lock_); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 150 | void WaitForOtherNonDaemonThreadsToExit() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 151 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 152 | Locks::thread_suspend_count_lock_); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 153 | |
Ian Rogers | 50b35e2 | 2012-10-04 10:09:15 -0700 | [diff] [blame] | 154 | void AssertThreadsAreSuspended(Thread* self, Thread* ignore1, Thread* ignore2 = NULL) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 155 | LOCKS_EXCLUDED(Locks::thread_list_lock_, |
| 156 | Locks::thread_suspend_count_lock_); |
Elliott Hughes | 234ab15 | 2011-10-26 14:02:26 -0700 | [diff] [blame] | 157 | |
Chao-ying Fu | 9e36931 | 2014-05-21 11:20:52 -0700 | [diff] [blame] | 158 | std::bitset<kMaxThreadId> allocated_ids_ GUARDED_BY(Locks::allocated_thread_ids_lock_); |
Elliott Hughes | e52e49b | 2012-04-02 16:05:44 -0700 | [diff] [blame] | 159 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 160 | // The actual list of all threads. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 161 | std::list<Thread*> list_ GUARDED_BY(Locks::thread_list_lock_); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 162 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 163 | // Ongoing suspend all requests, used to ensure threads added to list_ respect SuspendAll. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 164 | int suspend_all_count_ GUARDED_BY(Locks::thread_suspend_count_lock_); |
| 165 | int debug_suspend_all_count_ GUARDED_BY(Locks::thread_suspend_count_lock_); |
Elliott Hughes | 8d768a9 | 2011-09-14 16:35:25 -0700 | [diff] [blame] | 166 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 167 | // Signaled when threads terminate. Used to determine when all non-daemons have terminated. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 168 | ConditionVariable thread_exit_cond_ GUARDED_BY(Locks::thread_list_lock_); |
Elliott Hughes | 93e74e8 | 2011-09-13 11:07:03 -0700 | [diff] [blame] | 169 | |
Mathieu Chartier | 70a596d | 2014-12-17 14:56:47 -0800 | [diff] [blame] | 170 | // Thread suspend time histogram. Only modified when all the threads are suspended, so guarding |
| 171 | // by mutator lock ensures no thread can read when another thread is modifying it. |
| 172 | Histogram<uint64_t> suspend_all_historam_ GUARDED_BY(Locks::mutator_lock_); |
| 173 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 174 | friend class Thread; |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 175 | |
| 176 | DISALLOW_COPY_AND_ASSIGN(ThreadList); |
| 177 | }; |
| 178 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 179 | } // namespace art |
| 180 | |
Brian Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 181 | #endif // ART_RUNTIME_THREAD_LIST_H_ |