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/*
* Copyright (c) 2004, 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.ThreadInfo.getLockName;
import java.lang.management.*;
import java.io.*;
import nsk.share.*;
public class getlockname001 {
private static Wicket mainEntrance = new Wicket();
private static Object backDoor = new Object();
private static String lock
= backDoor.getClass().getName() + "@"
+ Integer.toHexString(System.identityHashCode(backDoor));
private static boolean testFailed = false;
public static void main(String[] argv) {
System.exit(Consts.JCK_STATUS_BASE + run(argv, System.out));
}
public static int run(String[] argv, PrintStream out) {
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
ThreadInfo info;
String name;
// Test MyThread that is going to be locked on "backDoor" object
MyThread myThread = new MyThread(out);
myThread.start();
long id = myThread.getId();
// Wait for MyThread to start
mainEntrance.waitFor();
synchronized(backDoor) {
// MyThread is about to be locked on "backDoor" right now
info = mbean.getThreadInfo(id, Integer.MAX_VALUE);
name = info.getLockName();
backDoor.notify();
if (!lock.equals(name)) {
out.println("Failure 1.");
out.println("ThreadInfo.getLockName() returned string \"" + name
+ "\" for a locked thread, but \"" + lock
+ "\" expected.");
testFailed = true;
}
}
// Test "main" that is not locked on any object
id = Thread.currentThread().getId();
info = mbean.getThreadInfo(id, Integer.MAX_VALUE);
name = info.getLockName();
if (name != null) {
out.println("Failure 2.");
out.println("ThreadInfo.getLockName() returned not-null \"" + name
+ "\" for a running thread.");
testFailed = true;
}
if (testFailed)
out.println("TEST FAILED");
return (testFailed) ? Consts.TEST_FAILED : Consts.TEST_PASSED;
}
private static class MyThread extends Thread {
PrintStream out;
MyThread(PrintStream out) {
this.out = out;
}
public void run() {
synchronized(backDoor) {
// Notify "main" thread that "backDoor" is waiting for a signal
mainEntrance.unlock();
// The thread is locked on "backDoor" object
try {
backDoor.wait();
} catch (InterruptedException e) {
out.println("Unexpected exception.");
e.printStackTrace(out);
testFailed = true;
}
}
} // run()
} // MyThread
}
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