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 GetPutInt

    28  */

    29 

    30 import java.lang.reflect.Field;

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

    32 import sun.misc.Unsafe;

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

    34 

    35 public class GetPutInt {

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

    37         Unsafe unsafe = Utils.getUnsafe();

    38         Test t = new Test();

    39         Field field = Test.class.getField("i");

    40 

    41         int offset = unsafe.fieldOffset(field);

    42         assertEquals(-1, unsafe.getInt(t, offset));

    43         unsafe.putInt(t, offset, 0);

    44         assertEquals(0, unsafe.getInt(t, offset));

    45 

    46         long address = unsafe.allocateMemory(8);

    47         unsafe.putInt(address, 1);

    48         assertEquals(1, unsafe.getInt(address));

    49         unsafe.freeMemory(address);

    50 

    51         int arrayInt[] = { -1, 0, 1, 2 };

    52         int scale = unsafe.arrayIndexScale(arrayInt.getClass());

    53         offset = unsafe.arrayBaseOffset(arrayInt.getClass());

    54         for (int i = 0; i < arrayInt.length; i++) {

    55             assertEquals(unsafe.getInt(arrayInt, offset), arrayInt[i]);

    56             offset += scale;

    57         }

    58     }

    59 

    60     static class Test {

    61         public int i = -1;

    62     }

    63 }