/*

 * Copyright (c) 2006, 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 6485605

 *  @summary com.sun.jdi.InternalException: Inconsistent suspend policy in internal event handler

 *

 *  @author jjh

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g SuspendThreadTest.java

 *  @run main SuspendThreadTest

 */

import com.sun.jdi.*;

import com.sun.jdi.event.*;

import com.sun.jdi.request.*;

import java.util.*;

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

class SuspendThreadTarg {

    public static long count;

    public static void bkpt() {

        count++;

    }

    public static void main(String[] args){

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

        // We need this to be running so the bkpt

        // can be hit immediately when it is enabled

        // in the back-end.

        while(count >= 0) {

            bkpt();

        }

        System.out.println("Goodbye from SuspendThreadTarg, count = " + count);

    }

}

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

public class SuspendThreadTest extends TestScaffold {

    ClassType targetClass;

    ThreadReference mainThread;

    SuspendThreadTest (String args[]) {

        super(args);

    }

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

        new SuspendThreadTest(args).startTests();

    }

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

    // 1000 makes the test take over 2 mins on win32

    static int maxBkpts = 200;

    int bkptCount;

    BreakpointRequest bkptRequest;

    Field debuggeeCountField;

    // When we get a bkpt we want to disable the request,

    // resume the debuggee, and then re-enable the request

    public void breakpointReached(BreakpointEvent event) {

        System.out.println("Got BreakpointEvent: " + bkptCount +

                           ", debuggeeCount = " +

                           ((LongValue)targetClass.

                            getValue(debuggeeCountField)).value()

                           );

        bkptRequest.disable();

    }

    public void eventSetComplete(EventSet set) {

        set.resume();

        // The main thread watchs the bkptCount to

        // see if bkpts stop coming in.  The

        // test _should_ fail well before maxBkpts bkpts.

        if (bkptCount++ < maxBkpts) {

            bkptRequest.enable();

        }

    }

    public void vmDisconnected(VMDisconnectEvent event) {

        println("Got VMDisconnectEvent");

    }

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

    protected void runTests() throws Exception {

        /*

         * Get to the top of main()

         * to determine targetClass and mainThread

         */

        BreakpointEvent bpe = startToMain("SuspendThreadTarg");

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

        mainThread = bpe.thread();

        EventRequestManager erm = vm().eventRequestManager();

        Location loc1 = findMethod(targetClass, "bkpt", "()V").location();

        bkptRequest = erm.createBreakpointRequest(loc1);

        // Without this, it is a SUSPEND_ALL bkpt and the test will pass

        bkptRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);

        bkptRequest.enable();

        debuggeeCountField = targetClass.fieldByName("count");

        try {

            addListener (this);

        } catch (Exception ex){

            ex.printStackTrace();

            failure("failure: Could not add listener");

            throw new Exception("SuspendThreadTest: failed");

        }

        int prevBkptCount;

        vm().resume();

        while (bkptCount < maxBkpts) {

            prevBkptCount = bkptCount;

            // If we don't get a bkpt within 5 secs,

            // the test fails

            try {

                Thread.sleep(5000);

            } catch (InterruptedException ee) {

            }

            if (prevBkptCount == bkptCount) {

                failure("failure: test hung");

                break;

            }

            prevBkptCount = bkptCount;

        }

        println("done with loop");

        bkptRequest.disable();

        removeListener(this);

        /*

         * deal with results of test

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

         */

        if (!testFailed) {

            println("SuspendThreadTest: passed");

        } else {

            throw new Exception("SuspendThreadTest: failed");

        }

    }

}