Mercurial > hg > truffle
diff test/runtime/7100935/TestShortArraycopy.java @ 4010:16f9fa2bf76c
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 |
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date | Wed, 19 Oct 2011 10:52:30 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/7100935/TestShortArraycopy.java Wed Oct 19 10:52:30 2011 -0700 @@ -0,0 +1,77 @@ +/* + * Copyright 2011 SAP AG. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test TestShortArraycopy + * @bug 7100935 + * @summary verify that shorts are copied element-wise atomic. + * @run main/othervm -Xint TestShortArraycopy + * @run main/othervm -Xcomp -Xbatch TestShortArraycopy + * @author volker.simonis@gmail.com + */ + +public class TestShortArraycopy { + + static short[] a1 = new short[8]; + static short[] a2 = new short[8]; + static short[] a3 = new short[8]; + + static volatile boolean keepRunning = true; + + public static void main(String[] args) throws InterruptedException { + + for (int i = 0; i < a1.length ; i++) { + a1[i] = (short)0xffff; + a2[i] = (short)0xffff; + a3[i] = (short)0x0000; + } + Thread reader = new Thread() { + public void run() { + while (keepRunning) { + for (int j = 0; j < a1.length; j++) { + short s = a1[j]; + if (s != (short)0xffff && s != (short)0x0000) { + System.out.println("Error: s = " + s); + throw new RuntimeException("wrong result"); + + } + } + } + } + }; + Thread writer = new Thread() { + public void run() { + for (int i = 0; i < 1000000; i++) { + System.arraycopy(a2, 5, a1, 3, 3); + System.arraycopy(a3, 5, a1, 3, 3); + } + } + }; + keepRunning = true; + reader.start(); + writer.start(); + writer.join(); + keepRunning = false; + reader.join(); + } +}