jdk8-mips64-public/hotspot: test/compiler/6863420/Test.java@8c95980d0b66

     1 /*

     2  * Copyright 2009 D.E. Shaw.  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  *

    23  */

    25 /**

    26  * @test

    27  * @bug 6863420

    28  * @summary os::javaTimeNanos() go backward on Solaris x86

    29  *

    30  * Notice the internal timeout in timeout thread Test.TOT.

    31  * @run main/othervm/timeout=300 Test

    32  */

    34 public class Test {

    36     static final int INTERNAL_TIMEOUT=240;

    37     static class TOT extends Thread {

    38        public void run() {

    39            try {

    40                Thread.sleep(INTERNAL_TIMEOUT*1000);

    41            } catch (InterruptedException ex) {

    42            }

    43            done = true;

    44        }

    45     }

    47     static long value = 0;

    48     static boolean got_backward_time = false;

    49     static volatile boolean done = false;

    51     public static void main(String args[]) {

    52         final int count = 100000;

    54         TOT tot = new TOT();

    55         tot.setDaemon(true);

    56         tot.start();

    58         for (int numThreads = 1; !done && numThreads <= 32; numThreads++) {

    59             final int numRuns = 1;

    60             for (int t=1; t <= numRuns; t++) {

    61                 final int curRun = t;

    63                 System.out.println("Spawning " + numThreads + " threads");

    64                 final Thread threads[] = new Thread[numThreads];

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

    66                     Runnable thread =

    67                         new Runnable() {

    68                             public void run() {

    69                                 for (long l = 0; !done && l < 100000; l++) {

    70                                     final long start = System.nanoTime();

    71                                     if (value == 12345678) {

    72                                         System.out.println("Wow!");

    73                                     }

    74                                     final long end = System.nanoTime();

    75                                     final long time = end - start;

    76                                     value += time;

    77                                     if (time < 0) {

    78                                         System.out.println(

    79                                             "Backwards: " +

    80                                             "start=" + start + " " +

    81                                             "end=" + end + " " +

    82                                             "time= " + time

    83                                         );

    84                                         got_backward_time = true;

    85                                     }

    86                                 }

    87                             }

    88                         };

    89                     threads[i] = new Thread(thread, "Thread" + i);

    90                 }

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

    92                     threads[i].start();

    93                 }

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

    95                     try {

    96                         threads[i].join();

    97                     }

    98                     catch (InterruptedException e) {

    99                         continue;

   100                     }

   101                 }

   102             }

   103         }

   105         if (got_backward_time) {

   106             System.exit(97);

   107         }

   108     }

   109 }

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