/*

 * Copyright (c) 2012, 2013, 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 7190310

 * @summary Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops

 *

 * @run main/othervm/timeout=600 -Xbatch compiler.c2.Test7190310

 */

/*

 * Note bug exhibits as infinite loop, timeout is helpful.

 * It should normally finish pretty quickly, but on some especially slow machines

 * it may not.  The companion _unsafe test lacks a timeout, but that is okay.

 */

package compiler.c2;

import java.lang.ref.Reference;

import java.lang.ref.ReferenceQueue;

import java.lang.ref.WeakReference;

public class Test7190310 {

    private static Object str = new Object() {

        public String toString() {

            return "The Object";

        }

        protected void finalize() throws Throwable {

            System.out.println("The Object is being finalized");

            super.finalize();

        }

    };

    private final static ReferenceQueue<Object> rq =

            new ReferenceQueue<Object>();

    private final static WeakReference<Object> wr =

            new WeakReference<Object>(str, rq);

    public static void main(String[] args)

            throws InterruptedException {

        Thread reader = new Thread() {

            public void run() {

                while (wr.get() != null) {

                }

                System.out.println("wr.get() returned null");

            }

        };

        Thread queueReader = new Thread() {

            public void run() {

                try {

                    Reference<? extends Object> ref = rq.remove();

                    System.out.println(ref);

                    System.out.println("queueReader returned, ref==wr is "

                            + (ref == wr));

                } catch (InterruptedException e) {

                    System.err.println("Sleep interrupted - exiting");

                }

            }

        };

        reader.start();

        queueReader.start();

        Thread.sleep(1000);

        str = null;

        System.gc();

    }

}