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comparison src/share/vm/runtime/task.cpp @ 10405:f2110083203d

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8005849: JEP 167: Event-Based JVM Tracing Reviewed-by: acorn, coleenp, sla Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author sla
date Mon, 10 Jun 2013 11:30:51 +0200
parents f34d701e952e
children 606acabe7b5c
comparison
equal deleted inserted replaced
10404:d0add7016434 10405:f2110083203d
1 /* 1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
112 112
113 PeriodicTask::~PeriodicTask() { 113 PeriodicTask::~PeriodicTask() {
114 disenroll(); 114 disenroll();
115 } 115 }
116 116
117 /* enroll could be called from a JavaThread, so we have to check for
118 * safepoint when taking the lock to avoid deadlocking */
117 void PeriodicTask::enroll() { 119 void PeriodicTask::enroll() {
118 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? 120 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ?
119 NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); 121 NULL : PeriodicTask_lock);
120 122
121 if (_num_tasks == PeriodicTask::max_tasks) { 123 if (_num_tasks == PeriodicTask::max_tasks) {
122 fatal("Overflow in PeriodicTask table"); 124 fatal("Overflow in PeriodicTask table");
123 } 125 }
124 _tasks[_num_tasks++] = this; 126 _tasks[_num_tasks++] = this;
129 } else { 131 } else {
130 WatcherThread::start(); 132 WatcherThread::start();
131 } 133 }
132 } 134 }
133 135
136 /* disenroll could be called from a JavaThread, so we have to check for
137 * safepoint when taking the lock to avoid deadlocking */
134 void PeriodicTask::disenroll() { 138 void PeriodicTask::disenroll() {
135 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? 139 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ?
136 NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); 140 NULL : PeriodicTask_lock);
137 141
138 int index; 142 int index;
139 for(index = 0; index < _num_tasks && _tasks[index] != this; index++) 143 for(index = 0; index < _num_tasks && _tasks[index] != this; index++)
140 ; 144 ;
141 145