Mercurial > hg > truffle

comparison src/share/vm/runtime/serviceThread.cpp @ 3356:78542e2b5e35

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans Summary: Add a notification to the GarbageCollectorMXBeans Reviewed-by: acorn, mchung
author fparain
date Thu, 12 May 2011 10:30:11 -0700
parents 216d916d5c12
children 31a4e55f8c9d
comparison
equal deleted inserted replaced
3355:f1cbbee6713b 3356:78542e2b5e35
26 #include "runtime/interfaceSupport.hpp" 26 #include "runtime/interfaceSupport.hpp"
27 #include "runtime/javaCalls.hpp" 27 #include "runtime/javaCalls.hpp"
28 #include "runtime/serviceThread.hpp" 28 #include "runtime/serviceThread.hpp"
29 #include "runtime/mutexLocker.hpp" 29 #include "runtime/mutexLocker.hpp"
30 #include "prims/jvmtiImpl.hpp" 30 #include "prims/jvmtiImpl.hpp"
31 #include "services/gcNotifier.hpp"
31 32
32 ServiceThread* ServiceThread::_instance = NULL; 33 ServiceThread* ServiceThread::_instance = NULL;
33 34
34 void ServiceThread::initialize() { 35 void ServiceThread::initialize() {
35 EXCEPTION_MARK; 36 EXCEPTION_MARK;
79 80
80 void ServiceThread::service_thread_entry(JavaThread* jt, TRAPS) { 81 void ServiceThread::service_thread_entry(JavaThread* jt, TRAPS) {
81 while (true) { 82 while (true) {
82 bool sensors_changed = false; 83 bool sensors_changed = false;
83 bool has_jvmti_events = false; 84 bool has_jvmti_events = false;
85 bool has_gc_notification_event = false;
84 JvmtiDeferredEvent jvmti_event; 86 JvmtiDeferredEvent jvmti_event;
85 { 87 {
86 // Need state transition ThreadBlockInVM so that this thread 88 // Need state transition ThreadBlockInVM so that this thread
87 // will be handled by safepoint correctly when this thread is 89 // will be handled by safepoint correctly when this thread is
88 // notified at a safepoint. 90 // notified at a safepoint.
93 95
94 ThreadBlockInVM tbivm(jt); 96 ThreadBlockInVM tbivm(jt);
95 97
96 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 98 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
97 while (!(sensors_changed = LowMemoryDetector::has_pending_requests()) && 99 while (!(sensors_changed = LowMemoryDetector::has_pending_requests()) &&
98 !(has_jvmti_events = JvmtiDeferredEventQueue::has_events())) { 100 !(has_jvmti_events = JvmtiDeferredEventQueue::has_events()) &&
101 !(has_gc_notification_event = GCNotifier::has_event())) {
99 // wait until one of the sensors has pending requests, or there is a 102 // wait until one of the sensors has pending requests, or there is a
100 // pending JVMTI event to post 103 // pending JVMTI event or JMX GC notification to post
101 Service_lock->wait(Mutex::_no_safepoint_check_flag); 104 Service_lock->wait(Mutex::_no_safepoint_check_flag);
102 } 105 }
103 106
104 if (has_jvmti_events) { 107 if (has_jvmti_events) {
105 jvmti_event = JvmtiDeferredEventQueue::dequeue(); 108 jvmti_event = JvmtiDeferredEventQueue::dequeue();
111 } 114 }
112 115
113 if (sensors_changed) { 116 if (sensors_changed) {
114 LowMemoryDetector::process_sensor_changes(jt); 117 LowMemoryDetector::process_sensor_changes(jt);
115 } 118 }
119
120 if(has_gc_notification_event) {
121 GCNotifier::sendNotification(CHECK);
122 }
116 } 123 }
117 } 124 }
118 125
119 bool ServiceThread::is_service_thread(Thread* thread) { 126 bool ServiceThread::is_service_thread(Thread* thread) {
120 return thread == _instance; 127 return thread == _instance;