/*
* Copyright ( c ) 2010 , Oracle and / or its affiliates . 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 7009231
* @ summary C1 : Incorrect CAS code for longs on SPARC 32 bit
*
* @ run main / othervm - Xbatch compiler . codegen . Test7009231
*/
package compiler.codegen;
import java.util.concurrent.atomic.AtomicLong;
public class Test7009231 {
public static void main(String[] args) throws InterruptedException {
doTest(8 );
}
private static void doTest(int nThreads) throws InterruptedException {
Thread [] aThreads = new Thread [nThreads];
final AtomicLong atl = new AtomicLong();
for (int i = 0 ; i < nThreads; i++) {
aThreads[i] = new RunnerThread(atl, 1 L << (8 * i));
}
for (int i = 0 ; i < nThreads; i++) {
aThreads[i].start();
}
for (int i = 0 ; i < nThreads; i++) {
aThreads[i].join();
}
}
public static class RunnerThread extends Thread {
public RunnerThread(AtomicLong atomic, long lMask) {
m_lMask = lMask;
m_atomic = atomic;
}
public void run() {
AtomicLong atomic = m_atomic;
long lMask = m_lMask;
for (int i = 0 ; i < 100000 ; i++) {
setBit(atomic, lMask);
clearBit(atomic, lMask);
}
}
protected void setBit(AtomicLong atomic, long lMask) {
long lWord;
do {
lWord = atomic.get();
} while (!atomic.compareAndSet(lWord, lWord | lMask));
if ((atomic.get() & lMask) == 0 L) {
throw new InternalError();
}
}
protected void clearBit(AtomicLong atomic, long lMask) {
long lWord;
do {
lWord = atomic.get();
} while (!atomic.compareAndSet(lWord, lWord & ~lMask));
if ((atomic.get() & lMask) != 0 L) {
throw new InternalError();
}
}
private long m_lMask;
private AtomicLong m_atomic;
}
}
Messung V0.5 in Prozent C=89 H=90 G=89
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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