/*

 * Copyright (c) 2003, 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 4893530

 *  @summary If JDI is initially started from a thread group that is subsequently

 *           destroyed this should not impact subsequent thread creation by

 *           the virtual machine manager.

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile ThreadGroupTest.java

 *  @run main ThreadGroupTest

 */

import com.sun.jdi.*;

import com.sun.jdi.connect.*;

import com.sun.jdi.event.*;

import com.sun.jdi.request.*;

import java.util.*;

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

class ThreadGroupTarg {

    public static void main(String[] args){

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

        System.out.println("Goodbye from ThreadGroupTarg!");

    }

}

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

public class ThreadGroupTest extends TestScaffold {

    ReferenceType targetClass;

    ThreadReference mainThread;

    // Helper thread to fetch VirtualMachineManager

    static class Fetcher implements Runnable {

        public void run() {

            Bootstrap.virtualMachineManager();

        }

    }

    ThreadGroupTest (String args[]) {

        super(args);

    }

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

        // create a random thread group, and run a thread in that group to

        // fetch the VirtualMachineManager

        ThreadGroup tg = new ThreadGroup("Gus");

        Fetcher fetcher = new Fetcher();

        Thread thr = new Thread(tg, fetcher);

        thr.start();

        try {

            thr.join();

        } catch (InterruptedException x) { }

        // now destroy the thread group

        tg.destroy();

        // run the test

        new ThreadGroupTest(args).startTests();

    }

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

    protected void runTests() throws Exception {

        // run the target until it completes

        startToMain("ThreadGroupTarg");

        listenUntilVMDisconnect();

        /*

         * deal with results of test

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

         */

        if (!testFailed) {

            println("ThreadGroupTest: passed");

        } else {

            throw new Exception("ThreadGroupTest: failed");

        }

    }

}