| /* |
| * Copyright 2009 D.E. Shaw. All Rights Reserved. |
| * 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /** |
| * @test |
| * @bug 6863420 |
| * @summary os::javaTimeNanos() go backward on Solaris x86 |
| * |
| * @run main/othervm Test |
| */ |
| |
| public class Test { |
| static long value = 0; |
| static boolean got_backward_time = false; |
| |
| public static void main(String args[]) { |
| final int count = 100000; |
| |
| for (int numThreads = 1; numThreads <= 32; numThreads++) { |
| final int numRuns = 1; |
| for (int t=1; t <= numRuns; t++) { |
| final int curRun = t; |
| |
| System.out.println("Spawning " + numThreads + " threads"); |
| final Thread threads[] = new Thread[numThreads]; |
| for (int i = 0; i < threads.length; i++) { |
| Runnable thread = |
| new Runnable() { |
| public void run() { |
| for (long l = 0; l < 100000; l++) { |
| final long start = System.nanoTime(); |
| if (value == 12345678) { |
| System.out.println("Wow!"); |
| } |
| final long end = System.nanoTime(); |
| final long time = end - start; |
| value += time; |
| if (time < 0) { |
| System.out.println( |
| "Backwards: " + |
| "start=" + start + " " + |
| "end=" + end + " " + |
| "time= " + time |
| ); |
| got_backward_time = true; |
| } |
| } |
| } |
| }; |
| threads[i] = new Thread(thread, "Thread" + i); |
| } |
| for (int i = 0; i < threads.length; i++) { |
| threads[i].start(); |
| } |
| for (int i = 0; i < threads.length; i++) { |
| try { |
| threads[i].join(); |
| } |
| catch (InterruptedException e) { |
| continue; |
| } |
| } |
| } |
| } |
| |
| if (got_backward_time) { |
| System.exit(97); |
| } |
| } |
| } |