Test7009231.java revision 11707:ad7af1afda7a 
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
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23 */
24
25/**
26 * @test
27 * @bug 7009231
28 * @summary C1: Incorrect CAS code for longs on SPARC 32bit
29 *
30 * @run main/othervm -Xbatch compiler.codegen.Test7009231
31 */
32
33package compiler.codegen;
34
35import java.util.concurrent.atomic.AtomicLong;
36
37public class Test7009231 {
38    public static void main(String[] args) throws InterruptedException {
39        doTest(8);
40    }
41
42    private static void doTest(int nThreads) throws InterruptedException {
43        Thread[]         aThreads = new Thread[nThreads];
44        final AtomicLong atl      = new AtomicLong();
45
46        for (int i = 0; i < nThreads; i++) {
47          aThreads[i] = new RunnerThread(atl, 1L << (8 * i));
48        }
49
50        for (int i = 0; i < nThreads; i++) {
51          aThreads[i].start();
52        }
53
54        for (int i = 0; i < nThreads; i++) {
55          aThreads[i].join();
56        }
57    }
58
59    public static class RunnerThread extends Thread {
60        public RunnerThread(AtomicLong atomic, long lMask) {
61            m_lMask  = lMask;
62            m_atomic = atomic;
63        }
64
65        public void run() {
66            AtomicLong atomic = m_atomic;
67            long       lMask  = m_lMask;
68            for (int i = 0; i < 100000; i++) {
69                setBit(atomic, lMask);
70                clearBit(atomic, lMask);
71            }
72        }
73
74        protected void setBit(AtomicLong atomic, long lMask) {
75            long lWord;
76            do {
77                lWord = atomic.get();
78            } while (!atomic.compareAndSet(lWord, lWord | lMask));
79
80            if ((atomic.get() & lMask) == 0L) {
81                throw new InternalError();
82            }
83        }
84
85        protected void clearBit(AtomicLong atomic, long lMask) {
86            long lWord;
87            do {
88                lWord = atomic.get();
89            } while (!atomic.compareAndSet(lWord, lWord & ~lMask));
90
91            if ((atomic.get() & lMask) != 0L) {
92                throw new InternalError();
93            }
94        }
95
96        private long m_lMask;
97        private AtomicLong m_atomic;
98    }
99}
100