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/*
* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package nsk.monitoring.share.thread;
import nsk.share.log.Log;
import java.lang.management.ThreadInfo;
import java.lang.management.MonitorInfo;
import java.lang.management.LockInfo;
/**
* WaitingThread is RecursiveMonitoringThread that is waiting on a lock.
*/
public class WaitingThread extends RecursiveMonitoringThread {
private String lock = new String("a lock");
private volatile boolean ready = false;
private Object readyLock = new Object();
private static final String[] expectedMethods = {
"nsk.monitoring.share.thread.WaitingThread.runInside",
"java.lang.Object.wait"
};
public WaitingThread(Log log, RunType recursionType, int maxDepth) {
super(log, recursionType, maxDepth);
}
public void checkThreadInfo(ThreadInfo info) {
super.checkThreadInfo(info);
verify(info.getThreadState() == Thread.State.WAITING, "ThreadInfo.getThreadState() = " + info.getThreadState() + " != " + Thread.State.WAITING);
verify(info.getBlockedTime() == 0 || info.getBlockedTime() == -1, "ThreadInfo.getBlockedTime() == " + info.getBlockedTime());
verify(info.getBlockedCount() >= 0, "ThreadInfo.getBlockedCount() = " + info.getBlockedCount() + " != 1");
verify(info.getWaitedTime() > 0 || info.getWaitedTime() == -1, "ThreadInfo.getWaitedTime() == " + info.getWaitedTime());
verify(info.getWaitedCount() == 1, "ThreadInfo.getWaitedCount() = " + info.getWaitedCount() + " != 1");
checkLockInfo(info.getLockInfo());
verify(info.getLockName().equals(info.getLockInfo().toString()), "ThreadInfo.getLockName() = " + info.getLockName() + " != ThreadInfo.getLockInfo().toString() = " + info.getLockInfo().toString());
verify(info.getLockOwnerId() == -1, "ThreadInfo.getLockOwnerId() = " + info.getLockOwnerId() + " != -1");
verify(info.getLockOwnerName() == null , "ThreadInfo.getLockOwnerName() = " + info.getLockOwnerName() + " != null");
checkMonitorInfo(info.getLockedMonitors(), null);
checkSynchronizers(info.getLockedSynchronizers(), null);
}
private void checkLockInfo(LockInfo lockInfo) {
verify(lockInfo.getClassName().equals(lock.getClass().getName()), "LockInfo.getClassName() = " + lockInfo.getClassName() + " differs from lock.getClass().getName() = " + lock.getClass().getName());
verify(lockInfo.getIdentityHashCode() == System.identityHashCode(lock), "LockInfo.getIdentityHashCode() = " + lockInfo.getIdentityHashCode() + " differs from System.identityHashCode(lock) = " + System.identityHashCode(lock));
String expectedToString = lock.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(lock));
verify(lockInfo.toString().equals(expectedToString), "LockInfo.toString() = " + lockInfo.toString() + " differs from expected toString() = " + expectedToString);
}
public void waitState() {
synchronized (readyLock) {
while (!ready) {
try {
readyLock.wait();
} catch (InterruptedException e) {
log.warn(e);
}
}
}
waitThreadState(Thread.State.WAITING);
}
public void finish() {
ready = false;
synchronized (lock) {
lock.notifyAll();
}
}
protected void runInside() {
synchronized (readyLock) {
ready = true;
readyLock.notifyAll();
}
while (ready) {
synchronized (lock) {
try {
lock.wait();
} catch (InterruptedException e) {
log.warn(e);
}
}
}
}
protected boolean isStackTraceElementExpected(StackTraceElement element) {
return super.isStackTraceElementExpected(element) || checkStackTraceElement(element, expectedMethods);
}
}
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