/*

 * Copyright (c) 2008, 2016, 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 6772683

 * @summary Thread.isInterrupted() fails to return true on multiprocessor PC

 *

 * @run main/othervm compiler.c2.InterruptedTest 100

 */

package compiler.c2;

public class InterruptedTest {

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

        /* The value of the threshold determines for how many seconds

         * the main thread must wait for the worker thread. On highly

         * loaded systems it can take a while until the worker thread

         * obtains CPU time and is able to check if it was interrupted

         * by the main thread. The higher the threshold the likelier

         * the worker thread can check if it was interrupted (that is

         * required for successul test execution).

         */

        int threshold = 100;

        if (args.length != 1) {

            System.out.println("Incorrect number of arguments");

            System.exit(1);

        }

        try {

            threshold = Integer.parseInt(args[0]);

        } catch (NumberFormatException e) {

            System.out.println("Invalid argument format");

            System.exit(1);

        }

        if (threshold < 1) {

            System.out.println("Threshold must be at least 1");

            System.exit(1);

        }

        Thread workerThread = new Thread("worker") {

            public void run() {

                System.out.println("Worker thread: running...");

                while (!Thread.currentThread().isInterrupted()) {

                }

                System.out.println("Worker thread: bye");

            }

        };

        System.out.println("Main thread: starts a worker thread...");

        workerThread.start();

        System.out.println("Main thread: waits 5 seconds after starting the worker thread");

        workerThread.join(5000); // Wait 5 sec to let run() method to be compiled

        int ntries = 0;

        while (workerThread.isAlive() && ntries < threshold) {

            System.out.println("Main thread: interrupts the worker thread...");

            workerThread.interrupt();

            if (workerThread.isInterrupted()) {

                System.out.println("Main thread: worker thread is interrupted");

            }

            ntries++;

            System.out.println("Main thread: waits 1 second for the worker thread to die...");

            workerThread.join(1000); // Wait 1 sec and try again

        }

        if (ntries == threshold) {

          System.out.println("Main thread: the worker thread did not die after " +

                             ntries + " seconds have elapsed");

          System.exit(97);

        }

        System.out.println("Main thread: bye");

    }

}