/*

 * 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 4401399

 *  @summary Simple basic test of jdi Monitor request and event.

 *

 *  @author Swamy Venkataramanappa

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g MonitorEventTest.java

 *  @run driver MonitorEventTest

 */

import com.sun.jdi.*;

import com.sun.jdi.event.*;

import com.sun.jdi.request.*;

import java.util.*;

/********** target program **********/

class MonitorTestTarg {

    public static Object endingMonitor;

    public static Object startingMonitor;

    public static final long timeout = 30 * 6000; // milliseconds

    public static volatile boolean aboutEnterLock;

    static void foo() {

        System.out.println("Howdy!");

    }

    public static void main(String[] args){

        endingMonitor = new Object();

        startingMonitor = new Object();

        myThread t1 = new myThread();

        foo();

        aboutEnterLock = false;

        synchronized(endingMonitor) {

            // run thread

            try {

                // start thread

                synchronized (startingMonitor) {

                    t1.start();

                    startingMonitor.wait(timeout);

                }

            } catch (InterruptedException e) {

                System.out.println("Interrupted exception " + e);

            }

            Thread.yield();

            while(!(aboutEnterLock && t1.getState() == Thread.State.BLOCKED)) {

                try {

                    Thread.sleep(1000);

                }catch(Exception x){

                    System.out.println(x);

                }

            }

        }

        try {

            t1.join(timeout);

        } catch (Exception x){

            System.out.println("Exception while thread.join :" + x);

        }

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

    }

}

class myThread extends Thread {

    public void run() {

        synchronized(MonitorTestTarg.startingMonitor) {

            MonitorTestTarg.startingMonitor.notify();

        }

        // contended enter wait until main thread release monitor

        MonitorTestTarg.aboutEnterLock = true;

        synchronized (MonitorTestTarg.endingMonitor) {

        }

    }

}

    /********** test program **********/

public class MonitorEventTest extends TestScaffold {

    ReferenceType targetClass;

    ThreadReference mainThread;

    List monitors;

    MonitorContendedEnterRequest contendedEnterRequest;

    MonitorWaitedRequest monitorWaitedRequest;

    MonitorContendedEnteredRequest contendedEnteredRequest;

    MonitorWaitRequest monitorWaitRequest;

    static int actualWaitCount = 0;

    static int actualWaitedCount = 0;

    static int actualContendedEnterCount = 0;

    static int actualContendedEnteredCount= 0;

    MonitorEventTest (String args[]) {

        super(args);

    }

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

        new MonitorEventTest(args).startTests();

    }

    /********** event handlers **********/

    public void monitorContendedEnter(MonitorContendedEnterEvent event) {

        actualContendedEnterCount++;

    }

    public void monitorContendedEntered(MonitorContendedEnteredEvent event) {

        actualContendedEnteredCount++;

    }

    public void monitorWait(MonitorWaitEvent event) {

        actualWaitCount++;

    }

    public void monitorWaited(MonitorWaitedEvent event) {

        actualWaitedCount++;

    }

    /********** test core **********/

    protected void runTests() throws Exception {

        /*

         * Get to the top of main()

         * to determine targetClass and mainThread

         */

        BreakpointEvent bpe = startToMain("MonitorTestTarg");

        targetClass = bpe.location().declaringType();

        mainThread = bpe.thread();

        int initialSize = mainThread.frames().size();

        if (vm().canRequestMonitorEvents()) {

            contendedEnterRequest = eventRequestManager().createMonitorContendedEnterRequest();

            contendedEnterRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);

            contendedEnterRequest.enable();

            contendedEnteredRequest = eventRequestManager().createMonitorContendedEnteredRequest();

            contendedEnteredRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);

            contendedEnteredRequest.enable();

            monitorWaitRequest = eventRequestManager().createMonitorWaitRequest();

            monitorWaitRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);

            monitorWaitRequest.enable();

            monitorWaitedRequest = eventRequestManager().createMonitorWaitedRequest();

            monitorWaitedRequest.setSuspendPolicy(EventRequest.SUSPEND_NONE);

            monitorWaitedRequest.enable();

        } else {

            System.out.println("request monitor events not supported " );

        }

        resumeTo("MonitorTestTarg", "foo", "()V");

        /*

         * resume until end

         */

        listenUntilVMDisconnect();

        /*

         * At least one of each type event should have recevied by this test.

         */

        if (vm().canRequestMonitorEvents()) {

            if (actualContendedEnterCount == 0) {

                failure("Did not receive any  contended enter event.");

            }

            if (actualContendedEnteredCount == 0) {

                failure("Did not receive any contended entered event. ");

            }

            if (actualWaitCount == 0) {

                failure("Did not receive any contended monitor wait event");

            }

            if (actualWaitedCount == 0) {

                failure("Did not receive any contended monitor waited event");

            }

        }

        /*

         * deal with results of test

         * if anything has called failure("foo") testFailed will be true

         */

        if (!testFailed) {

            println("MonitorEventTest: passed");

        } else {

            throw new Exception("MonitorEventTest: failed");

        }

    }

}