aoqi@0: /*
aoqi@0:  * Copyright 2009 D.E. Shaw.  All Rights Reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @test
aoqi@0:  * @bug 6863420
aoqi@0:  * @summary os::javaTimeNanos() go backward on Solaris x86
aoqi@0:  *
aoqi@0:  * Notice the internal timeout in timeout thread Test.TOT.
aoqi@0:  * @run main/othervm/timeout=300 Test
aoqi@0:  */
aoqi@0: 
aoqi@0: public class Test {
aoqi@0: 
aoqi@0:     static final int INTERNAL_TIMEOUT=240;
aoqi@0:     static class TOT extends Thread {
aoqi@0:        public void run() {
aoqi@0:            try {
aoqi@0:                Thread.sleep(INTERNAL_TIMEOUT*1000);
aoqi@0:            } catch (InterruptedException ex) {
aoqi@0:            }
aoqi@0:            done = true;
aoqi@0:        }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static long value = 0;
aoqi@0:     static boolean got_backward_time = false;
aoqi@0:     static volatile boolean done = false;
aoqi@0: 
aoqi@0:     public static void main(String args[]) {
aoqi@0:         final int count = 100000;
aoqi@0: 
aoqi@0:         TOT tot = new TOT();
aoqi@0:         tot.setDaemon(true);
aoqi@0:         tot.start();
aoqi@0: 
aoqi@0:         for (int numThreads = 1; !done && numThreads <= 32; numThreads++) {
aoqi@0:             final int numRuns = 1;
aoqi@0:             for (int t=1; t <= numRuns; t++) {
aoqi@0:                 final int curRun = t;
aoqi@0: 
aoqi@0:                 System.out.println("Spawning " + numThreads + " threads");
aoqi@0:                 final Thread threads[] = new Thread[numThreads];
aoqi@0:                 for (int i = 0; i < threads.length; i++) {
aoqi@0:                     Runnable thread =
aoqi@0:                         new Runnable() {
aoqi@0:                             public void run() {
aoqi@0:                                 for (long l = 0; !done && l < 100000; l++) {
aoqi@0:                                     final long start = System.nanoTime();
aoqi@0:                                     if (value == 12345678) {
aoqi@0:                                         System.out.println("Wow!");
aoqi@0:                                     }
aoqi@0:                                     final long end = System.nanoTime();
aoqi@0:                                     final long time = end - start;
aoqi@0:                                     value += time;
aoqi@0:                                     if (time < 0) {
aoqi@0:                                         System.out.println(
aoqi@0:                                             "Backwards: " +
aoqi@0:                                             "start=" + start + " " +
aoqi@0:                                             "end=" + end + " " +
aoqi@0:                                             "time= " + time
aoqi@0:                                         );
aoqi@0:                                         got_backward_time = true;
aoqi@0:                                     }
aoqi@0:                                 }
aoqi@0:                             }
aoqi@0:                         };
aoqi@0:                     threads[i] = new Thread(thread, "Thread" + i);
aoqi@0:                 }
aoqi@0:                 for (int i = 0; i < threads.length; i++) {
aoqi@0:                     threads[i].start();
aoqi@0:                 }
aoqi@0:                 for (int i = 0; i < threads.length; i++) {
aoqi@0:                     try {
aoqi@0:                         threads[i].join();
aoqi@0:                     }
aoqi@0:                     catch (InterruptedException e) {
aoqi@0:                         continue;
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         if (got_backward_time) {
aoqi@0:             System.exit(97);
aoqi@0:         }
aoqi@0:     }
aoqi@0: }