| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. 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 |
| * @summary Verifies behaviour of Unsafe.copyMemory |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @run main CopyMemory |
| */ |
| |
| import jdk.internal.misc.Unsafe; |
| import static jdk.test.lib.Asserts.*; |
| |
| public class CopyMemory { |
| final static int LENGTH = 8; |
| public static void main(String args[]) throws Exception { |
| Unsafe unsafe = Unsafe.getUnsafe(); |
| long src = unsafe.allocateMemory(LENGTH); |
| long dst = unsafe.allocateMemory(LENGTH); |
| assertNotEquals(src, 0L); |
| assertNotEquals(dst, 0L); |
| |
| // call copyMemory() with different lengths and verify the contents of |
| // the destination array |
| for (int i = 0; i < LENGTH; i++) { |
| unsafe.putByte(src + i, (byte)i); |
| unsafe.copyMemory(src, dst, i); |
| for (int j = 0; j < i; j++) { |
| assertEquals(unsafe.getByte(src + j), unsafe.getByte(src + j)); |
| } |
| } |
| unsafe.freeMemory(src); |
| unsafe.freeMemory(dst); |
| } |
| } |