java_lang_Thread.cc revision dbe6f4613ae0161b169f4fca8a616b0b393370ab
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 178218847294600bbfcdc041a46c2b579b6e70cf3bElliott Hughes#include "debugger.h" 188daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "jni_internal.h" 198daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "object.h" 2000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers#include "scoped_thread_state_change.h" 2154643083afd5b99f4d52a32b4030aec0db8d0e2fElliott Hughes#include "ScopedUtfChars.h" 228daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "thread.h" 238daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes#include "thread_list.h" 248daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 258daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesnamespace art { 268daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 270512f02dd6623c0870c11fbf3274d7462f732136Elliott Hughesstatic jobject Thread_currentThread(JNIEnv* env, jclass) { 28dbe6f4613ae0161b169f4fca8a616b0b393370abMathieu Chartier return reinterpret_cast<JNIEnvExt*>(env)->self->GetPeer(); 298daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 308daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 31365c10235438607541fa2259a5fec48061b90bd8Ian Rogersstatic jboolean Thread_interrupted(JNIEnv* env, jclass) { 3200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers return reinterpret_cast<JNIEnvExt*>(env)->self->Interrupted() ? JNI_TRUE : JNI_FALSE; 338daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 348daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 3557aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jboolean Thread_isInterrupted(JNIEnv* env, jobject java_thread) { 3600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 37b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_list_lock_); 3800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 39d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes return (thread != NULL) ? thread->IsInterrupted() : JNI_FALSE; 408daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 418daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 4252673ffae0025d86f4023735581f19ebcc477487Ian Rogersstatic void Thread_nativeCreate(JNIEnv* env, jclass, jobject java_thread, jlong stack_size, 4352673ffae0025d86f4023735581f19ebcc477487Ian Rogers jboolean daemon) { 4452673ffae0025d86f4023735581f19ebcc477487Ian Rogers Thread::CreateNativeThread(env, java_thread, stack_size, daemon == JNI_TRUE); 458daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 468daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 4757aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jint Thread_nativeGetStatus(JNIEnv* env, jobject java_thread, jboolean has_been_started) { 48cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes // Ordinals from Java's Thread.State. 49cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaNew = 0; 50cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaRunnable = 1; 51cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaBlocked = 2; 52cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaWaiting = 3; 53cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaTimedWaiting = 4; 54cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes const jint kJavaTerminated = 5; 55cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes 5600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 5757aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes ThreadState internal_thread_state = (has_been_started ? kTerminated : kStarting); 58b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_list_lock_); 5900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 60cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes if (thread != NULL) { 61b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_suspend_count_lock_); 62cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes internal_thread_state = thread->GetState(); 63cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes } 64cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes switch (internal_thread_state) { 6500f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kTerminated: return kJavaTerminated; 6600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kRunnable: return kJavaRunnable; 6700f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kTimedWaiting: return kJavaTimedWaiting; 6800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kBlocked: return kJavaBlocked; 6900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaiting: return kJavaWaiting; 7000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kStarting: return kJavaNew; 7100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kNative: return kJavaRunnable; 7200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForGcToComplete: return kJavaWaiting; 7300f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingPerformingGc: return kJavaWaiting; 7400f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerSend: return kJavaWaiting; 7500f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerToAttach: return kJavaWaiting; 7600f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingInMainDebuggerLoop: return kJavaWaiting; 7700f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForDebuggerSuspension: return kJavaWaiting; 7800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForJniOnLoad: return kJavaWaiting; 7900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingForSignalCatcherOutput: return kJavaWaiting; 8000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kWaitingInMainSignalCatcherLoop: return kJavaWaiting; 8100f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers case kSuspended: return kJavaRunnable; 82cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes // Don't add a 'default' here so the compiler can spot incompatible enum changes. 838e4aac52962d54cb4be2078b9cd95685e067133aElliott Hughes } 84cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes return -1; // Unreachable. 858daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 868daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 8757aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic jboolean Thread_nativeHoldsLock(JNIEnv* env, jobject java_thread, jobject java_object) { 8800f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 8900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Object* object = soa.Decode<Object*>(java_object); 905f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes if (object == NULL) { 915f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes Thread::Current()->ThrowNewException("Ljava/lang/NullPointerException;", "object == null"); 925f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes return JNI_FALSE; 935f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes } 94b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_list_lock_); 9500f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 965f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes return thread->HoldsLock(object); 978daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 988daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 9957aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic void Thread_nativeInterrupt(JNIEnv* env, jobject java_thread) { 10000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 101b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_list_lock_); 10200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 1035f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes if (thread != NULL) { 1045f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes thread->Interrupt(); 1055f79133a435ebcb20000370d56046fe01201dd80Elliott Hughes } 1068daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1078daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 10815bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogersstatic void Thread_nativeSetName(JNIEnv* env, jobject peer, jstring java_name) { 10957aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes ScopedUtfChars name(env, java_name); 11015bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers { 11115bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers ScopedObjectAccess soa(env); 112dbe6f4613ae0161b169f4fca8a616b0b393370abMathieu Chartier if (soa.Env()->IsSameObject(peer, soa.Self()->GetPeer())) { 113dbe6f4613ae0161b169f4fca8a616b0b393370abMathieu Chartier soa.Self()->SetThreadName(name.c_str()); 11415bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers return; 11515bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 11615bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 11715bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // Suspend thread to avoid it from killing itself while we set its name. We don't just hold the 11815bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // thread list lock to avoid this, as setting the thread name causes mutator to lock/unlock 11915bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers // in the DDMS send code. 12015bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers bool timeout; 12115bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers Thread* thread = Thread::SuspendForDebugger(peer, true, &timeout); 12215bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers if (thread != NULL) { 12315bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers { 12415bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers ScopedObjectAccess soa(env); 12515bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers thread->SetThreadName(name.c_str()); 12615bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } 12715bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers Runtime::Current()->GetThreadList()->Resume(thread, true); 12815bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers } else if (timeout) { 12915bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers LOG(ERROR) << "Trying to set thread name to '" << name.c_str() << "' failed as the thread " 13015bf2d34efa2218e287b584fb3653d268b9edc8dIan Rogers "failed to suspend within a generous timeout."; 131899e789bd4741c0172268f7838ce8ab220a5f916Elliott Hughes } 1328daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1338daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1348daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes/* 13557aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes * Alter the priority of the specified thread. "new_priority" will range 1368daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * from Thread.MIN_PRIORITY to Thread.MAX_PRIORITY (1-10), with "normal" 1378daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * threads at Thread.NORM_PRIORITY (5). 1388daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes */ 13957aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughesstatic void Thread_nativeSetPriority(JNIEnv* env, jobject java_thread, jint new_priority) { 14000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers ScopedObjectAccess soa(env); 141b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers MutexLock mu(*Locks::thread_list_lock_); 14200f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers Thread* thread = Thread::FromManagedThread(soa, java_thread); 143d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes if (thread != NULL) { 14457aba86f29d7e795bf7e68c65cc464d2291b6af1Elliott Hughes thread->SetNativePriority(new_priority); 145d369bb76dee0df2d2a106e9bf7f4e6446ed6deaaElliott Hughes } 1468daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1478daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1488daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes/* 1498daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * Causes the thread to temporarily pause and allow other threads to execute. 1508daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * 1518daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * The exact behavior is poorly defined. Some discussion here: 1528daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes * http://www.cs.umd.edu/~pugh/java/memoryModel/archive/0944.html 1538daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes */ 1540512f02dd6623c0870c11fbf3274d7462f732136Elliott Hughesstatic void Thread_yield(JNIEnv*, jobject) { 1558daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes sched_yield(); 1568daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1578daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1588daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesstatic JNINativeMethod gMethods[] = { 1598daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, currentThread, "()Ljava/lang/Thread;"), 1608daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, interrupted, "()Z"), 1618daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, isInterrupted, "()Z"), 16252673ffae0025d86f4023735581f19ebcc477487Ian Rogers NATIVE_METHOD(Thread, nativeCreate, "(Ljava/lang/Thread;JZ)V"), 163cf2b2d44070de8a3baa2c19ebf3d8cef2ad7fd5bElliott Hughes NATIVE_METHOD(Thread, nativeGetStatus, "(Z)I"), 1648daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeHoldsLock, "(Ljava/lang/Object;)Z"), 1658daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeInterrupt, "()V"), 1668daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeSetName, "(Ljava/lang/String;)V"), 1678daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, nativeSetPriority, "(I)V"), 1688daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes NATIVE_METHOD(Thread, yield, "()V"), 1698daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes}; 1708daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1718daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughesvoid register_java_lang_Thread(JNIEnv* env) { 172eac766769e3114a078c188ea26776a81f0edb3cfElliott Hughes REGISTER_NATIVE_METHODS("java/lang/Thread"); 1738daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} 1748daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes 1758daa0929f08a3080ea64dbd4e997e72f411e6fc9Elliott Hughes} // namespace art 176