1/*
2 * Copyright (c) 2015, 2016, 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/putDouble
27 * @library /test/lib
28 * @modules java.base/jdk.internal.misc
29 *          java.management
30 * @run main GetPutDouble
31 */
32
33import java.lang.reflect.Field;
34import jdk.internal.misc.Unsafe;
35import static jdk.test.lib.Asserts.*;
36
37public class GetPutDouble {
38    public static void main(String args[]) throws Exception {
39        Unsafe unsafe = Unsafe.getUnsafe();
40        Test t = new Test();
41        Field field = Test.class.getField("d");
42
43        long offset = unsafe.objectFieldOffset(field);
44        assertEquals(-1.0, unsafe.getDouble(t, offset));
45        unsafe.putDouble(t, offset, 0.0);
46        assertEquals(0.0, unsafe.getDouble(t, offset));
47
48        long address = unsafe.allocateMemory(8);
49        unsafe.putDouble(address, 1.0);
50        assertEquals(1.0, unsafe.getDouble(address));
51        unsafe.freeMemory(address);
52
53        double arrayDouble[] = { -1.0, 0.0, 1.0, 2.0 };
54        int scale = unsafe.arrayIndexScale(arrayDouble.getClass());
55        offset = unsafe.arrayBaseOffset(arrayDouble.getClass());
56        for (int i = 0; i < arrayDouble.length; i++) {
57            assertEquals(unsafe.getDouble(arrayDouble, offset), arrayDouble[i]);
58            offset += scale;
59        }
60    }
61
62    static class Test {
63        public double d = -1.0;
64    }
65}
66