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comparison test/runtime/7100935/TestShortArraycopy.java @ 4010:16f9fa2bf76c

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7100935: win32: memmove is not atomic but is used for pd_conjoint_*_atomic operations Summary: replace the call to memmove by a simple copy loop Reviewed-by: dholmes, kvn, never Contributed-by: axel.siebenborn@sap.com, volker.simonis@gmail.com
author kvn
date Wed, 19 Oct 2011 10:52:30 -0700
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4009:e5928e7dab26 4010:16f9fa2bf76c
1 /*
2 * Copyright 2011 SAP AG. 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 TestShortArraycopy
26 * @bug 7100935
27 * @summary verify that shorts are copied element-wise atomic.
28 * @run main/othervm -Xint TestShortArraycopy
29 * @run main/othervm -Xcomp -Xbatch TestShortArraycopy
30 * @author volker.simonis@gmail.com
31 */
32
33 public class TestShortArraycopy {
34
35 static short[] a1 = new short[8];
36 static short[] a2 = new short[8];
37 static short[] a3 = new short[8];
38
39 static volatile boolean keepRunning = true;
40
41 public static void main(String[] args) throws InterruptedException {
42
43 for (int i = 0; i < a1.length ; i++) {
44 a1[i] = (short)0xffff;
45 a2[i] = (short)0xffff;
46 a3[i] = (short)0x0000;
47 }
48 Thread reader = new Thread() {
49 public void run() {
50 while (keepRunning) {
51 for (int j = 0; j < a1.length; j++) {
52 short s = a1[j];
53 if (s != (short)0xffff && s != (short)0x0000) {
54 System.out.println("Error: s = " + s);
55 throw new RuntimeException("wrong result");
56
57 }
58 }
59 }
60 }
61 };
62 Thread writer = new Thread() {
63 public void run() {
64 for (int i = 0; i < 1000000; i++) {
65 System.arraycopy(a2, 5, a1, 3, 3);
66 System.arraycopy(a3, 5, a1, 3, 3);
67 }
68 }
69 };
70 keepRunning = true;
71 reader.start();
72 writer.start();
73 writer.join();
74 keepRunning = false;
75 reader.join();
76 }
77 }