/*

 * Copyright 2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

import java.lang.instrument.Instrumentation;

public class StressGetObjectSizeApp

    extends ASimpleInstrumentationTestCase

{

    /**

     * Constructor for StressGetObjectSizeApp.

     * @param name

     */

    public StressGetObjectSizeApp(String name)

    {

        super(name);

    }

    public static void

    main (String[] args)

        throws Throwable {

        ATestCaseScaffold   test = new StressGetObjectSizeApp(args[0]);

        test.runTest();

    }

    protected final void

    doRunTest()

        throws Throwable {

        stressGetObjectSize();

    }

    public void stressGetObjectSize() {

        System.out.println("main: an object size=" +

            fInst.getObjectSize(new Object()));

        RoundAndRound[] threads = new RoundAndRound[10];

        for (int i = 0; i < threads.length; ++i) {

            threads[i] = new RoundAndRound(fInst);

            threads[i].start();

        }

        try {

            Thread.sleep(500); // let all threads get going in their loops

        } catch (InterruptedException ie) {

        }

        System.out.println("stressGetObjectSize: returning");

        return;

    }

    private static class RoundAndRound extends Thread {

        private final Instrumentation inst;

        private final Object anObject;

        public RoundAndRound(Instrumentation inst) {

            this.inst = inst;

            this.anObject = new Object();

            setDaemon(true);

        }

        public void run() {

            long sum = 0;

            while (true) {

              sum += inst.getObjectSize(anObject);

            }

        }

    }

}