1/* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/** 25 * @test 26 * @bug 7009231 27 * @summary C1: Incorrect CAS code for longs on SPARC 32bit 28 * 29 * @run main/othervm -Xbatch compiler.codegen.Test7009231 30 */ 31 32package compiler.codegen; 33 34import java.util.concurrent.atomic.AtomicLong; 35 36public class Test7009231 { 37 public static void main(String[] args) throws InterruptedException { 38 doTest(8); 39 } 40 41 private static void doTest(int nThreads) throws InterruptedException { 42 Thread[] aThreads = new Thread[nThreads]; 43 final AtomicLong atl = new AtomicLong(); 44 45 for (int i = 0; i < nThreads; i++) { 46 aThreads[i] = new RunnerThread(atl, 1L << (8 * i)); 47 } 48 49 for (int i = 0; i < nThreads; i++) { 50 aThreads[i].start(); 51 } 52 53 for (int i = 0; i < nThreads; i++) { 54 aThreads[i].join(); 55 } 56 } 57 58 public static class RunnerThread extends Thread { 59 public RunnerThread(AtomicLong atomic, long lMask) { 60 m_lMask = lMask; 61 m_atomic = atomic; 62 } 63 64 public void run() { 65 AtomicLong atomic = m_atomic; 66 long lMask = m_lMask; 67 for (int i = 0; i < 100000; i++) { 68 setBit(atomic, lMask); 69 clearBit(atomic, lMask); 70 } 71 } 72 73 protected void setBit(AtomicLong atomic, long lMask) { 74 long lWord; 75 do { 76 lWord = atomic.get(); 77 } while (!atomic.compareAndSet(lWord, lWord | lMask)); 78 79 if ((atomic.get() & lMask) == 0L) { 80 throw new InternalError(); 81 } 82 } 83 84 protected void clearBit(AtomicLong atomic, long lMask) { 85 long lWord; 86 do { 87 lWord = atomic.get(); 88 } while (!atomic.compareAndSet(lWord, lWord & ~lMask)); 89 90 if ((atomic.get() & lMask) != 0L) { 91 throw new InternalError(); 92 } 93 } 94 95 private long m_lMask; 96 private AtomicLong m_atomic; 97 } 98} 99