hotspot/test/runtime/Unsafe/GetUncompressedObject.java
changeset 30288 476c276de939
child 30604 b8d532cb6420
equal deleted inserted replaced
30287:b39d2cec5056 30288:476c276de939
       
     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 /* @test
       
    25  * @bug 8022853
       
    26  * @library /testlibrary
       
    27  * @modules java.base/sun.misc
       
    28  * @run main GetUncompressedObject
       
    29  */
       
    30 
       
    31 import static com.oracle.java.testlibrary.Asserts.*;
       
    32 
       
    33 import com.oracle.java.testlibrary.*;
       
    34 import sun.misc.Unsafe;
       
    35 
       
    36 public class GetUncompressedObject {
       
    37 
       
    38     public static void main(String args[]) throws Exception {
       
    39         Unsafe unsafe = Utils.getUnsafe();
       
    40 
       
    41         // Allocate some memory and fill it with non-zero values.
       
    42         final int size = 32;
       
    43         final long address = unsafe.allocateMemory(size);
       
    44         unsafe.setMemory(address, size, (byte) 0x23);
       
    45 
       
    46         // The only thing we can do is check for null-ness.
       
    47         // So, store a null somewhere.
       
    48         unsafe.putAddress(address + 16, 0);
       
    49 
       
    50         Object nullObj = unsafe.getUncompressedObject(address + 16);
       
    51         if (nullObj != null) {
       
    52             throw new InternalError("should be null");
       
    53         }
       
    54     }
       
    55 
       
    56 }