/*

 * Copyright (c) 2005, 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.

 */

/*

 * @test

 * @bug     5086470 6358247

 * @summary Basic Test for ThreadInfo.getLockedMonitors()

 *          - a stack frame acquires no monitor

 *          - a stack frame acquires one or more monitors

 *          - a stack frame blocks on Object.wait

 *            and the monitor waiting is not locked.

 *          LockingThread is the class that creates threads

 *          and do the checking.

 *

 * @author  Mandy Chung

 *

 * @build Barrier

 * @build LockingThread

 * @build ThreadDump

 */

import java.lang.management.*;

import java.util.*;

public class LockedMonitors {

    public static void main(String[] argv) throws Exception {

        ThreadMXBean mbean = ManagementFactory.getThreadMXBean();

        if (!mbean.isObjectMonitorUsageSupported()) {

            System.out.println("Monitoring of object monitor usage is not supported");

            return;

        }

        // Start the thread and print the thread dump

        LockingThread.startLockingThreads();

        ThreadDump.threadDump();

        ThreadInfo[] tinfos;

        long[] ids = LockingThread.getThreadIds();

        // Dump all threads with locked monitors

        tinfos = mbean.dumpAllThreads(true, false);

        LockingThread.checkLockedMonitors(tinfos);

        // Dump all threads with locked monitors and locked synchronizers

        tinfos = mbean.dumpAllThreads(true, true);

        LockingThread.checkLockedMonitors(tinfos);

        // Test getThreadInfo with locked monitors

        tinfos = mbean.getThreadInfo(ids, true, false);

        if (tinfos.length != ids.length) {

            throw new RuntimeException("Number of ThreadInfo objects = " +

                tinfos.length + " not matched. Expected: " + ids.length);

        }

        LockingThread.checkLockedMonitors(tinfos);

        // Test getThreadInfo with locked monitors and locked synchronizers

        tinfos = mbean.getThreadInfo(ids, true, true);

        if (tinfos.length != ids.length) {

            throw new RuntimeException("Number of ThreadInfo objects = " +

                tinfos.length + " not matched. Expected: " + ids.length);

        }

        LockingThread.checkLockedMonitors(tinfos);

        System.out.println("Test passed");

    }

}