/*
* 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 / timeout = 300 compiler . runtime . Test6863420
*/
/*
* Notice the internal timeout in timeout thread Test6863420 . TOT .
*/
package compiler.runtime;
public class Test6863420 {
static final int INTERNAL_TIMEOUT=240 ;
static class TOT extends Thread {
public void run() {
try {
Thread .sleep(INTERNAL_TIMEOUT*1000 );
} catch (InterruptedException ex) {
}
done = true ;
}
}
static long value = 0 ;
static boolean got_backward_time = false ;
static volatile boolean done = false ;
public static void main(String args[]) {
final int count = 100000 ;
TOT tot = new TOT();
tot.setDaemon(true );
tot.start();
for (int numThreads = 1 ; !done && 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 ; !done && 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 );
}
}
}
Messung V0.5 in Prozent C=98 H=64 G=82
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-01)
¤
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