1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. 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
  26  * @library /testlibrary
  27  * @run main CopyMemory
  28  */
  29 
  30 import com.oracle.java.testlibrary.*;
  31 import sun.misc.Unsafe;
  32 import static com.oracle.java.testlibrary.Asserts.*;
  33 
  34 public class CopyMemory {
  35     final static int LENGTH = 8;
  36     public static void main(String args[]) throws Exception {
  37         Unsafe unsafe = Utils.getUnsafe();
  38         long src = unsafe.allocateMemory(LENGTH);
  39         long dst = unsafe.allocateMemory(LENGTH);
  40         assertNotEquals(src, 0L);
  41         assertNotEquals(dst, 0L);
  42 
  43         for (int i = 0; i < LENGTH; i++) {
  44             unsafe.putByte(src + i, (byte)i);
  45             unsafe.copyMemory(src, dst, i);
  46             for (int j = 0; j < i; j++) {
  47                 assertEquals(unsafe.getByte(src + j), unsafe.getByte(src + j));
  48             }
  49         }
  50         unsafe.freeMemory(src);
  51         unsafe.freeMemory(dst);
  52     }
  53 }