/*

 * 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.

 *

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/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file:

 *

 * Written by Doug Lea with assistance from members of JCP JSR-166

 * Expert Group and released to the public domain, as explained at

 * http://creativecommons.org/publicdomain/zero/1.0/

 */

/*

 * @test

 * @author Doug Lea

 * @bug 8004138

 * @summary Check if ForkJoinPool table leaks thrown exceptions.

 * @run main/othervm -Xmx8m -Djava.util.concurrent.ForkJoinPool.common.parallelism=4 FJExceptionTableLeak

 */

import java.util.concurrent.ForkJoinPool;

import java.util.concurrent.RecursiveAction;

public class FJExceptionTableLeak {

    // This test was observed to fail with pre-bug-fix jdk7 -Xmx8m,

    // using STEPS = 220 and TASKS_PER_STEP = 100

    static final int PRE_BUG_FIX_FAILURE_STEPS = 220;

    static final int STEPS = 10 * PRE_BUG_FIX_FAILURE_STEPS;

    static final int TASKS_PER_STEP = 100;

    static class FailingTaskException extends RuntimeException {}

    static class FailingTask extends RecursiveAction {

        public void compute() {

            throw new FailingTaskException();

        }

    }

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

        ForkJoinPool pool = new ForkJoinPool(4);

        FailingTask[] tasks = new FailingTask[TASKS_PER_STEP];

        for (int k = 0; k < STEPS; ++k) {

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

                tasks[i] = new FailingTask();

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

                pool.execute(tasks[i]);

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

                try {

                    tasks[i].join();

                    throw new AssertionError("should throw");

                } catch (FailingTaskException success) {}

            }

        }

    }

}