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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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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 */

/*

 * @test TestCSLocker

 * @key gc

 * @bug 6186200

 * @summary This short test check RFE 6186200 changes. One thread locked

 * @summary completely in JNI CS, while other is trying to allocate memory

 * @summary provoking GC. OOM means FAIL, deadlock means PASS.

 * @run main/native/othervm -Xmx256m TestCSLocker

 */

public class TestCSLocker extends Thread

{

    static int timeout = 5000;

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

        long startTime = System.currentTimeMillis();

        // start garbage producer thread

        GarbageProducer garbageProducer = new GarbageProducer(1000000, 10);

        garbageProducer.start();

        // start CS locker thread

        CSLocker csLocker = new CSLocker();

        csLocker.start();

        // check timeout to success deadlocking

        while(System.currentTimeMillis() < startTime + timeout) {

            System.out.println("sleeping...");

            sleep(1000);

        }

        csLocker.unlock();

        garbageProducer.interrupt();

    }

}

class GarbageProducer extends Thread

{

    private int size;

    private int sleepTime;

    GarbageProducer(int size, int sleepTime) {

        this.size = size;

        this.sleepTime = sleepTime;

    }

    public void run() {

        boolean isRunning = true;

        while (isRunning) {

            try {

                int[] arr = null;

                arr = new int[size];

                sleep(sleepTime);

            } catch (InterruptedException e) {

                isRunning = false;

            }

        }

    }

}

class CSLocker extends Thread

{

    static { System.loadLibrary("TestCSLocker"); }

    public void run() {

        int[] a = new int[10];

        a[0] = 1;

        if (!lock(a)) {

            throw new RuntimeException("failed to acquire CSLock");

        }

    }

    native boolean lock(int[] array);

    native void unlock();

}