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  * @summary Verify behaviour of Unsafe.get/putObject

    27  * @library /testlibrary

    28  * @run main GetPutObject

    29  */

    30 

    31 import java.lang.reflect.Field;

    32 import com.oracle.java.testlibrary.*;

    33 import sun.misc.Unsafe;

    34 import static com.oracle.java.testlibrary.Asserts.*;

    35 

    36 public class GetPutObject {

    37     public static void main(String args[]) throws Exception {

    38         Unsafe unsafe = Utils.getUnsafe();

    39         Test t = new Test();

    40         Object o = new Object();

    41         Field field = Test.class.getField("o");

    42 

    43         int offset = unsafe.fieldOffset(field);

    44         assertEquals(t.o, unsafe.getObject(t, offset));

    45 

    46         unsafe.putObject(t, offset, o);

    47         assertEquals(o, unsafe.getObject(t, offset));

    48 

    49         Object arrayObject[] = { unsafe, null, new Object() };

    50         int scale = unsafe.arrayIndexScale(arrayObject.getClass());

    51         offset = unsafe.arrayBaseOffset(arrayObject.getClass());

    52         for (int i = 0; i < arrayObject.length; i++) {

    53             assertEquals(unsafe.getObject(arrayObject, offset), arrayObject[i]);

    54             offset += scale;

    55         }

    56     }

    57 

    58     static class Test {

    59         public Object o = new Object();

    60     }

    61 }