| /* |
| * 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 |
| * @bug 8022853 |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * @run main GetUncompressedObject |
| */ |
| |
| import static jdk.test.lib.Asserts.*; |
| |
| import jdk.internal.misc.Unsafe; |
| |
| public class GetUncompressedObject { |
| |
| public static void main(String args[]) throws Exception { |
| Unsafe unsafe = Unsafe.getUnsafe(); |
| |
| // Allocate some memory and fill it with non-zero values. |
| final int size = 32; |
| final long address = unsafe.allocateMemory(size); |
| unsafe.setMemory(address, size, (byte) 0x23); |
| |
| // The only thing we can do is check for null-ness. |
| // So, store a null somewhere. |
| unsafe.putAddress(address + 16, 0); |
| |
| Object nullObj = unsafe.getUncompressedObject(address + 16); |
| if (nullObj != null) { |
| throw new InternalError("should be null"); |
| } |
| } |
| |
| } |