1 /* 2 * Copyright (c) 2011 SAP SE. 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 }