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annotate 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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4010
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1 /*
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2 * Copyright 2011 SAP AG. 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
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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 * @test TestShortArraycopy
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26 * @bug 7100935
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27 * @summary verify that shorts are copied element-wise atomic.
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28 * @run main/othervm -Xint TestShortArraycopy
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29 * @run main/othervm -Xcomp -Xbatch TestShortArraycopy
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30 * @author volker.simonis@gmail.com
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31 */
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32
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33 public class TestShortArraycopy {
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34
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35 static short[] a1 = new short[8];
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36 static short[] a2 = new short[8];
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37 static short[] a3 = new short[8];
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38
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39 static volatile boolean keepRunning = true;
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40
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41 public static void main(String[] args) throws InterruptedException {
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42
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43 for (int i = 0; i < a1.length ; i++) {
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44 a1[i] = (short)0xffff;
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45 a2[i] = (short)0xffff;
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46 a3[i] = (short)0x0000;
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47 }
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48 Thread reader = new Thread() {
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49 public void run() {
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50 while (keepRunning) {
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51 for (int j = 0; j < a1.length; j++) {
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52 short s = a1[j];
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53 if (s != (short)0xffff && s != (short)0x0000) {
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54 System.out.println("Error: s = " + s);
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55 throw new RuntimeException("wrong result");
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56
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57 }
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58 }
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59 }
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60 }
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61 };
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62 Thread writer = new Thread() {
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63 public void run() {
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64 for (int i = 0; i < 1000000; i++) {
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65 System.arraycopy(a2, 5, a1, 3, 3);
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66 System.arraycopy(a3, 5, a1, 3, 3);
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67 }
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68 }
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69 };
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70 keepRunning = true;
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71 reader.start();
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72 writer.start();
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73 writer.join();
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74 keepRunning = false;
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75 reader.join();
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76 }
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77 }