99 lines
3.0 KiB
Java
99 lines
3.0 KiB
Java
/*
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* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 7009231
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* @summary C1: Incorrect CAS code for longs on SPARC 32bit
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*
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* @run main/othervm -Xbatch compiler.codegen.Test7009231
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*/
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package compiler.codegen;
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import java.util.concurrent.atomic.AtomicLong;
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public class Test7009231 {
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public static void main(String[] args) throws InterruptedException {
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doTest(8);
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}
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private static void doTest(int nThreads) throws InterruptedException {
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Thread[] aThreads = new Thread[nThreads];
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final AtomicLong atl = new AtomicLong();
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for (int i = 0; i < nThreads; i++) {
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aThreads[i] = new RunnerThread(atl, 1L << (8 * i));
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}
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for (int i = 0; i < nThreads; i++) {
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aThreads[i].start();
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}
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for (int i = 0; i < nThreads; i++) {
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aThreads[i].join();
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}
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}
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public static class RunnerThread extends Thread {
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public RunnerThread(AtomicLong atomic, long lMask) {
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m_lMask = lMask;
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m_atomic = atomic;
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}
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public void run() {
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AtomicLong atomic = m_atomic;
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long lMask = m_lMask;
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for (int i = 0; i < 100000; i++) {
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setBit(atomic, lMask);
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clearBit(atomic, lMask);
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}
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}
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protected void setBit(AtomicLong atomic, long lMask) {
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long lWord;
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do {
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lWord = atomic.get();
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} while (!atomic.compareAndSet(lWord, lWord | lMask));
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if ((atomic.get() & lMask) == 0L) {
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throw new InternalError();
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}
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}
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protected void clearBit(AtomicLong atomic, long lMask) {
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long lWord;
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do {
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lWord = atomic.get();
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} while (!atomic.compareAndSet(lWord, lWord & ~lMask));
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if ((atomic.get() & lMask) != 0L) {
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throw new InternalError();
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}
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}
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private long m_lMask;
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private AtomicLong m_atomic;
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}
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}
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