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annotate test/compiler/7009231/Test7009231.java @ 8018:cdb46031e718 jdk8-b77

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Added tag hs25-b18 for changeset 412d722168bc
author amurillo
date Fri, 08 Feb 2013 08:07:07 -0800
parents 037c727f35fb
children
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2089
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1 /*
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
037c727f35fb 7009231: C1: Incorrect CAS code for longs on SPARC 32bit
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /**
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26 * @test
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27 * @bug 7009231
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28 * @summary C1: Incorrect CAS code for longs on SPARC 32bit
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29 *
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30 * @run main/othervm -Xbatch Test7009231
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31 *
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32 */
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33
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34 import java.util.Random;
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35 import java.util.concurrent.atomic.AtomicLong;
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36
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37
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38 public class Test7009231 {
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39 public static void main(String[] args) throws InterruptedException {
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40 doTest(8);
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41 }
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42
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43 private static void doTest(int nThreads) throws InterruptedException {
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44 Thread[] aThreads = new Thread[nThreads];
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45 final AtomicLong atl = new AtomicLong();
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46
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47 for (int i = 0; i < nThreads; i++) {
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48 aThreads[i] = new RunnerThread(atl, 1L << (8 * i));
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49 }
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50
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51 for (int i = 0; i < nThreads; i++) {
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52 aThreads[i].start();
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53 }
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54
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55 for (int i = 0; i < nThreads; i++) {
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56 aThreads[i].join();
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57 }
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58 }
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59
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60 public static class RunnerThread extends Thread {
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61 public RunnerThread(AtomicLong atomic, long lMask) {
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62 m_lMask = lMask;
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63 m_atomic = atomic;
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64 }
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65
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66 public void run() {
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67 AtomicLong atomic = m_atomic;
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68 long lMask = m_lMask;
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69 for (int i = 0; i < 100000; i++) {
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70 setBit(atomic, lMask);
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71 clearBit(atomic, lMask);
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72 }
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73 }
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74
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75 protected void setBit(AtomicLong atomic, long lMask) {
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76 long lWord;
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77 do {
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78 lWord = atomic.get();
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79 } while (!atomic.compareAndSet(lWord, lWord | lMask));
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80
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81 if ((atomic.get() & lMask) == 0L) {
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82 throw new InternalError();
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83 }
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84 }
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85
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86 protected void clearBit(AtomicLong atomic, long lMask) {
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87 long lWord;
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88 do {
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89 lWord = atomic.get();
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90 } while (!atomic.compareAndSet(lWord, lWord & ~lMask));
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91
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92 if ((atomic.get() & lMask) != 0L) {
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93 throw new InternalError();
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94 }
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95 }
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96
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97 private long m_lMask;
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98 private AtomicLong m_atomic;
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99 }
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100 }