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 }