java_lang_Thread.cc revision 1d54e73444e017d3a65234e0f193846f3e27472b
18daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes/* 28daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * Copyright (C) 2008 The Android Open Source Project 38daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * 48daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 58daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * you may not use this file except in compliance with the License. 68daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * You may obtain a copy of the License at 78daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * 88daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 98daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * 108daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * Unless required by applicable law or agreed to in writing, software 118daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 128daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * See the License for the specific language governing permissions and 148daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * limitations under the License. 158daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes */ 168daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1762d6c772205b8859f0ebf7ad105402ec4c3e2e01Ian Rogers#include "common_throws.h" 188218847294600bbfcdc041a46c2b579b6e70cf3bElliott Hughes#include "debugger.h" 198daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "jni_internal.h" 204cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes#include "monitor.h" 212dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mirror/object.h" 2200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers#include "scoped_thread_state_change.h" 2354643083afd5b99f4d52a32b4030aec0db8d0e2fElliott Hughes#include "ScopedUtfChars.h" 248daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "thread.h" 258daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "thread_list.h" 268daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 278daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesnamespace art { 288daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 290512f02dd6623c0870c11fbf3274d7462f732136Elliott Hughesstatic jobject Thread_currentThread(JNIEnv* env, jclass) { 30cfaa455374aae0a08c8cb28b5bb306b17866d652Ian Rogers ScopedObjectAccess soa(env); 31cfaa455374aae0a08c8cb28b5bb306b17866d652Ian Rogers return soa.AddLocalReference<jobject>(soa.Self()->GetPeer()); 328daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 338daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 34365c10235438607541fa2259a5fec48061b90bd8Ian Rogersstatic jboolean Thread_interrupted(JNIEnv* env, jclass) { 35cfaa455374aae0a08c8cb28b5bb306b17866d652Ian Rogers return static_cast<JNIEnvExt*>(env)->self->Interrupted() ? JNI_TRUE : JNI_FALSE; 368daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 378daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 3857aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jboolean Thread_isInterrupted(JNIEnv* env, jobject java_thread) { 3900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 4050b35e2fd1a68cd1240e4a9d9f363e11764957d1Ian Rogers MutexLock mu(soa.Self(), *Locks::thread_list_lock_); 4100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 42d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes return (thread != NULL) ? thread->IsInterrupted() : JNI_FALSE; 438daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 448daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 4552673ffae0025d86f4023735581f19ebcc477487Ian Rogersstatic void Thread_nativeCreate(JNIEnv* env, jclass, jobject java_thread, jlong stack_size, 4652673ffae0025d86f4023735581f19ebcc477487Ian Rogers jboolean daemon) { 4752673ffae0025d86f4023735581f19ebcc477487Ian Rogers Thread::CreateNativeThread(env, java_thread, stack_size, daemon == JNI_TRUE); 488daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 498daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 5057aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jint Thread_nativeGetStatus(JNIEnv* env, jobject java_thread, jboolean has_been_started) { 51cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes // Ordinals from Java's Thread.State. 52cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaNew = 0; 53cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaRunnable = 1; 54cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaBlocked = 2; 55cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaWaiting = 3; 56cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaTimedWaiting = 4; 57cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaTerminated = 5; 58cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes 5900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 6057aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes ThreadState internal_thread_state = (has_been_started ? kTerminated : kStarting); 6150b35e2fd1a68cd1240e4a9d9f363e11764957d1Ian Rogers MutexLock mu(soa.Self(), *Locks::thread_list_lock_); 6200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 63cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes if (thread != NULL) { 64cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes internal_thread_state = thread->GetState(); 65cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes } 66cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes switch (internal_thread_state) { 6700f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kTerminated: return kJavaTerminated; 6800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kRunnable: return kJavaRunnable; 6900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kTimedWaiting: return kJavaTimedWaiting; 704cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes case kSleeping: return kJavaTimedWaiting; 7100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kBlocked: return kJavaBlocked; 7200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaiting: return kJavaWaiting; 7300f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kStarting: return kJavaNew; 7400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kNative: return kJavaRunnable; 7500f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForGcToComplete: return kJavaWaiting; 7600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingPerformingGc: return kJavaWaiting; 771d54e73444e017d3a65234e0f193846f3e27472bIan Rogers case kWaitingForCheckPointsToRun: return kJavaWaiting; 7800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerSend: return kJavaWaiting; 7900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerToAttach: return kJavaWaiting; 8000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingInMainDebuggerLoop: return kJavaWaiting; 8100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerSuspension: return kJavaWaiting; 8200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForJniOnLoad: return kJavaWaiting; 8300f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForSignalCatcherOutput: return kJavaWaiting; 8400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingInMainSignalCatcherLoop: return kJavaWaiting; 8500f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kSuspended: return kJavaRunnable; 86cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes // Don't add a 'default' here so the compiler can spot incompatible enum changes. 878e4aac52962d54cb4be2078b9cd95685e067133aElliott Hughes } 88cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes return -1; // Unreachable. 898daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 908daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 9157aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jboolean Thread_nativeHoldsLock(JNIEnv* env, jobject java_thread, jobject java_object) { 9200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 932dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* object = soa.Decode<mirror::Object*>(java_object); 945f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes if (object == NULL) { 9562d6c772205b8859f0ebf7ad105402ec4c3e2e01Ian Rogers ThrowNullPointerException(NULL, "object == null"); 965f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes return JNI_FALSE; 975f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes } 9850b35e2fd1a68cd1240e4a9d9f363e11764957d1Ian Rogers MutexLock mu(soa.Self(), *Locks::thread_list_lock_); 9900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 1005f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes return thread->HoldsLock(object); 1018daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1028daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 10357aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic void Thread_nativeInterrupt(JNIEnv* env, jobject java_thread) { 10400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 10581d425b0b232962441616f8b14f73620bffef5e5Ian Rogers MutexLock mu(soa.Self(), *Locks::thread_list_lock_); 10600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 1075f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes if (thread != NULL) { 1085f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes thread->Interrupt(); 1095f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes } 1108daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1118daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 11215bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogersstatic void Thread_nativeSetName(JNIEnv* env, jobject peer, jstring java_name) { 11357aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes ScopedUtfChars name(env, java_name); 11415bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers { 11515bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers ScopedObjectAccess soa(env); 1162dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers if (soa.Decode<mirror::Object*>(peer) == soa.Self()->GetPeer()) { 117dbe6f4613ae0161b169f4fca8a616b0b393370abMathieu Chartier soa.Self()->SetThreadName(name.c_str()); 11815bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers return; 11915bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 12015bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 12115bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // Suspend thread to avoid it from killing itself while we set its name. We don't just hold the 12215bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // thread list lock to avoid this, as setting the thread name causes mutator to lock/unlock 12315bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // in the DDMS send code. 124f327e07b37e349b1ec5eaad6dc294a9b7a081d20Elliott Hughes bool timed_out; 125f327e07b37e349b1ec5eaad6dc294a9b7a081d20Elliott Hughes Thread* thread = Thread::SuspendForDebugger(peer, true, &timed_out); 12615bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers if (thread != NULL) { 12715bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers { 12815bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers ScopedObjectAccess soa(env); 12915bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers thread->SetThreadName(name.c_str()); 13015bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 13115bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers Runtime::Current()->GetThreadList()->Resume(thread, true); 132f327e07b37e349b1ec5eaad6dc294a9b7a081d20Elliott Hughes } else if (timed_out) { 13315bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers LOG(ERROR) << "Trying to set thread name to '" << name.c_str() << "' failed as the thread " 13415bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers "failed to suspend within a generous timeout."; 135899e789bd4741c0172268f7838ce8ab220a5f916Elliott Hughes } 1368daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1378daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1388daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes/* 13957aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes * Alter the priority of the specified thread. "new_priority" will range 1408daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * from Thread.MIN_PRIORITY to Thread.MAX_PRIORITY (1-10), with "normal" 1418daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * threads at Thread.NORM_PRIORITY (5). 1428daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes */ 14357aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic void Thread_nativeSetPriority(JNIEnv* env, jobject java_thread, jint new_priority) { 14400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 14550b35e2fd1a68cd1240e4a9d9f363e11764957d1Ian Rogers MutexLock mu(soa.Self(), *Locks::thread_list_lock_); 14600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 147d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes if (thread != NULL) { 14857aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes thread->SetNativePriority(new_priority); 149d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes } 1508daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1518daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1524cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughesstatic void Thread_sleep(JNIEnv* env, jclass, jobject java_lock, jlong ms, jint ns) { 1534cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes ScopedObjectAccess soa(env); 1542dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* lock = soa.Decode<mirror::Object*>(java_lock); 1554cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes Monitor::Wait(Thread::Current(), lock, ms, ns, true, kSleeping); 1564cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes} 1574cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes 1588daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes/* 1598daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * Causes the thread to temporarily pause and allow other threads to execute. 1608daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * 1618daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * The exact behavior is poorly defined. Some discussion here: 1628daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * http://www.cs.umd.edu/~pugh/java/memoryModel/archive/0944.html 1638daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes */ 1640512f02dd6623c0870c11fbf3274d7462f732136Elliott Hughesstatic void Thread_yield(JNIEnv*, jobject) { 1658daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes sched_yield(); 1668daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1678daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1688daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesstatic JNINativeMethod gMethods[] = { 1698daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, currentThread, "()Ljava/lang/Thread;"), 1708daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, interrupted, "()Z"), 1718daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, isInterrupted, "()Z"), 17252673ffae0025d86f4023735581f19ebcc477487Ian Rogers NATIVE_METHOD(Thread, nativeCreate, "(Ljava/lang/Thread;JZ)V"), 173cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes NATIVE_METHOD(Thread, nativeGetStatus, "(Z)I"), 1748daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeHoldsLock, "(Ljava/lang/Object;)Z"), 1758daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeInterrupt, "()V"), 1768daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeSetName, "(Ljava/lang/String;)V"), 1778daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeSetPriority, "(I)V"), 1784cd121ef0cb35fced70c7d9de378277be7a727d9Elliott Hughes NATIVE_METHOD(Thread, sleep, "(Ljava/lang/Object;JI)V"), 1798daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, yield, "()V"), 1808daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes}; 1818daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1828daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesvoid register_java_lang_Thread(JNIEnv* env) { 183eac766769e3114a078c188ea26776a81f0edb3cfElliott Hughes REGISTER_NATIVE_METHODS("java/lang/Thread"); 1848daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1858daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1868daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} // namespace art 187