jdk8-mips64-public/hotspot: test/serviceability/threads/TestFalseDeadLock.java@dbb05f6d93c4

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 import java.lang.management.ManagementFactory;

    25 import java.lang.management.ThreadMXBean;

    26 import java.util.Random;

    28 /*

    29  * @test

    30  * @bug 8016304

    31  * @summary Make sure no deadlock is reported for this program which has no deadlocks.

    32  * @run main/othervm TestFalseDeadLock

    33  */

    35 /*

    36  * This test will not provoke the bug every time it is run since the bug is intermittent.

    37  * The test has a fixed running time of 5 seconds.

    38  */

    40 public class TestFalseDeadLock {

    41     private static ThreadMXBean bean;

    42     private static volatile boolean running = true;

    43     private static volatile boolean found = false;

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

    46         bean = ManagementFactory.getThreadMXBean();

    47         Thread[] threads = new Thread[500];

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

    49             Test t = new Test();

    50             threads[i] = new Thread(t);

    51             threads[i].start();

    52         }

    53         try {

    54             Thread.sleep(5000);

    55         } catch (InterruptedException ex) {

    56         }

    57         running = false;

    58         for (Thread t : threads) {

    59             t.join();

    60         }

    61         if (found) {

    62             throw new Exception("Deadlock reported, but there is no deadlock.");

    63         }

    64     }

    66     public static class Test implements Runnable {

    67         public void run() {

    68             Random r = new Random();

    69             while (running) {

    70                 try {

    71                     synchronized (this) {

    72                         wait(r.nextInt(1000) + 1);

    73                     }

    74                 } catch (InterruptedException ex) {

    75                 }

    76                 recurse(2000);

    77             }

    78             if (bean.findDeadlockedThreads() != null) {

    79                 System.out.println("FOUND!");

    80                 found = true;

    81             }

    82         }

    84         private void recurse(int i) {

    85             if (!running) {

    86                 // It is important for the test to call println here

    87                 // since there are locks inside that path.

    88                 System.out.println("Hullo");

    89             }

    90             else if (i > 0) {

    91                 recurse(i - 1);

    92             }

    93         }

    94     }

    95 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/serviceability/threads/TestFalseDeadLock.java@dbb05f6d93c4

test/serviceability/threads/TestFalseDeadLock.java