author | jbachorik |
Thu, 05 Sep 2013 14:34:22 +0200 | |
changeset 19814 | 77d0468c8874 |
parent 5506 | 202f599c92aa |
child 23010 | 6dadb192ad81 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test |
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* @bug 5086470 6358247 |
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* @summary Basic Test for ThreadMXBean.dumpAllThreads(false, true) |
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* and getThreadInfo of customized JSR-166 synchronizers. |
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* @author Mandy Chung |
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* |
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* @build Barrier |
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* @build ThreadDump |
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19814
77d0468c8874
8004179: Few of test/java/lang/management/ThreadMXBean/* tests don't clean up the created threads
jbachorik
parents:
5506
diff
changeset
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* @run main/othervm MyOwnSynchronizer |
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*/ |
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import java.lang.management.*; |
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import java.util.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.TimeUnit; |
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import java.io.*; |
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public class MyOwnSynchronizer { |
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static ThreadMXBean mbean = ManagementFactory.getThreadMXBean(); |
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static Mutex mutex = new Mutex(); |
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static MyThread thread = new MyThread(); |
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public static void main(String[] argv) throws Exception { |
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if (!mbean.isSynchronizerUsageSupported()) { |
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System.out.println("Monitoring of synchronizer usage not supported"); |
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return; |
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} |
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thread.setDaemon(true); |
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thread.start(); |
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// wait until myThread acquires mutex |
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while (!mutex.isLocked()) { |
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try { |
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Thread.sleep(100); |
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} catch (InterruptedException e) { |
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throw new RuntimeException(e); |
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} |
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} |
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ThreadDump.threadDump(); |
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// Test dumpAllThreads with locked synchronizers |
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ThreadInfo[] tinfos = mbean.dumpAllThreads(false, true); |
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for (ThreadInfo ti : tinfos) { |
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MonitorInfo[] monitors = ti.getLockedMonitors(); |
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if (monitors.length != 0) { |
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throw new RuntimeException("Name: " + ti.getThreadName() + |
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" has non-empty locked monitors = " + monitors.length); |
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} |
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LockInfo[] syncs = ti.getLockedSynchronizers(); |
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if (ti.getThreadId() == thread.getId()) { |
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thread.checkLockedSyncs(ti, syncs); |
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} |
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} |
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// Test getThreadInfo with locked synchronizers |
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tinfos = mbean.getThreadInfo(new long[] {thread.getId()}, false, true); |
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if (tinfos.length != 1) { |
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throw new RuntimeException("getThreadInfo() returns " + |
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tinfos.length + " ThreadInfo objects. Expected 0."); |
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} |
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ThreadInfo ti = tinfos[0]; |
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if (ti.getLockedMonitors().length != 0) { |
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throw new RuntimeException("Name: " + ti.getThreadName() + |
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" has non-empty locked monitors = " + |
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ti.getLockedMonitors().length); |
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} |
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thread.checkLockedSyncs(ti, ti.getLockedSynchronizers()); |
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System.out.println("Test passed"); |
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} |
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static class Mutex implements Lock, java.io.Serializable { |
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// Our internal helper class |
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class Sync extends AbstractQueuedSynchronizer { |
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// Report whether in locked state |
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protected boolean isHeldExclusively() { |
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return getState() == 1; |
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} |
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// Acquire the lock if state is zero |
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public boolean tryAcquire(int acquires) { |
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assert acquires == 1; // Otherwise unused |
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if (compareAndSetState(0, 1)) { |
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setExclusiveOwnerThread(Thread.currentThread()); |
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return true; |
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} |
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return false; |
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} |
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// Release the lock by setting state to zero |
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protected boolean tryRelease(int releases) { |
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assert releases == 1; // Otherwise unused |
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if (getState() == 0) throw new IllegalMonitorStateException(); |
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setExclusiveOwnerThread(null); |
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setState(0); |
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return true; |
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} |
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// Provide a Condition |
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Condition newCondition() { return new ConditionObject(); } |
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// Deserialize properly |
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private void readObject(ObjectInputStream s) |
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throws IOException, ClassNotFoundException { |
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s.defaultReadObject(); |
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setState(0); // reset to unlocked state |
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} |
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} |
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// The sync object does all the hard work. We just forward to it. |
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private final Sync sync = new Sync(); |
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public void lock() { sync.acquire(1); } |
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public boolean tryLock() { return sync.tryAcquire(1); } |
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public void unlock() { sync.release(1); } |
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public Condition newCondition() { return sync.newCondition(); } |
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public boolean isLocked() { return sync.isHeldExclusively(); } |
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public boolean hasQueuedThreads() { return sync.hasQueuedThreads(); } |
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public void lockInterruptibly() throws InterruptedException { |
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sync.acquireInterruptibly(1); |
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} |
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public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException { |
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return sync.tryAcquireNanos(1, unit.toNanos(timeout)); |
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} |
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public AbstractOwnableSynchronizer getSync() { return sync; } |
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} |
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static class MyThread extends Thread { |
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public MyThread() { |
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super("MyThread"); |
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} |
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public void run() { |
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mutex.lock(); |
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Object o = new Object(); |
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synchronized(o) { |
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try { |
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o.wait(); |
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} catch (InterruptedException e) { |
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throw new RuntimeException(e); |
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} |
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} |
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} |
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int OWNED_SYNCS = 1; |
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void checkLockedSyncs(ThreadInfo info, LockInfo[] syncs) { |
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if (!getName().equals(info.getThreadName())) { |
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throw new RuntimeException("Name: " + info.getThreadName() + |
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" not matched. Expected: " + getName()); |
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} |
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if (syncs.length != OWNED_SYNCS) { |
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throw new RuntimeException("Number of locked syncs = " + |
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syncs.length + |
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" not matched. Expected: " + OWNED_SYNCS); |
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} |
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AbstractOwnableSynchronizer s = mutex.getSync(); |
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String lockName = s.getClass().getName(); |
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int hcode = System.identityHashCode(s); |
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if (!lockName.equals(syncs[0].getClassName())) { |
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throw new RuntimeException("LockInfo : " + syncs[0] + |
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" class name not matched. Expected: " + lockName); |
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} |
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if (hcode != syncs[0].getIdentityHashCode()) { |
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throw new RuntimeException("LockInfo: " + syncs[0] + |
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" IdentityHashCode not matched. Expected: " + hcode); |
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} |
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} |
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} |
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} |