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comparison test/runtime/7100935/TestConjointAtomicArraycopy.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 TestConjointAtomicArraycopy
26 * @bug 7100935
27 * @summary verify that oops are copied element-wise atomic
28 * @run main/othervm -Xint TestConjointAtomicArraycopy
29 * @run main/othervm -Xcomp -Xbatch TestConjointAtomicArraycopy
30 * @author axel.siebenborn@sap.com
31 */
32
33 public class TestConjointAtomicArraycopy {
34
35 static volatile Object [] testArray = new Object [4];
36
37 static short[] a1 = new short[8];
38 static short[] a2 = new short[8];
39 static short[] a3 = new short[8];
40
41 static volatile boolean keepRunning = true;
42
43 static void testOopsCopy() throws InterruptedException{
44
45 }
46
47 public static void main(String[] args ) throws InterruptedException{
48 for (int i = 0; i < testArray.length; i++){
49 testArray[i] = new String("A");
50 }
51
52 Thread writer = new Thread (new Runnable(){
53 public void run(){
54 for (int i = 0 ; i < 1000000; i++) {
55 System.arraycopy(testArray, 1, testArray, 0, 3);
56 testArray[2] = new String("a");
57 }
58 }
59 });
60
61 Thread reader = new Thread( new Runnable(){
62 public void run(){
63 while (keepRunning){
64 String name = testArray[2].getClass().getName();
65 if(!(name.endsWith("String"))){
66 throw new RuntimeException("got wrong class name");
67 }
68 }
69 }
70 });
71 keepRunning = true;
72 reader.start();
73 writer.start();
74 writer.join();
75 keepRunning = false;
76 reader.join();
77 }
78 }