Mercurial > hg > truffle
comparison test/compiler/intrinsics/unsafe/UnsafeGetAddressTest.java @ 18041:52b4284cb496
Merge with jdk8u20-b26
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 15 Oct 2014 16:02:50 +0200 |
parents | 9ab9f254cfe2 |
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17606:45d7b2c7029d | 18041:52b4284cb496 |
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1 /* | |
2 * Copyright (c) 2014, 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 * @bug 6653795 | |
27 * @summary C2 intrinsic for Unsafe.getAddress performs pointer sign extension on 32-bit systems | |
28 * @run main UnsafeGetAddressTest | |
29 * | |
30 */ | |
31 | |
32 import sun.misc.Unsafe; | |
33 import java.lang.reflect.*; | |
34 | |
35 public class UnsafeGetAddressTest { | |
36 private static Unsafe unsafe; | |
37 | |
38 public static void main(String[] args) throws Exception { | |
39 Class c = UnsafeGetAddressTest.class.getClassLoader().loadClass("sun.misc.Unsafe"); | |
40 Field f = c.getDeclaredField("theUnsafe"); | |
41 f.setAccessible(true); | |
42 unsafe = (Unsafe)f.get(c); | |
43 | |
44 long address = unsafe.allocateMemory(unsafe.addressSize()); | |
45 unsafe.putAddress(address, 0x0000000080000000L); | |
46 // from sun.misc.Unsafe.getAddress' documentation: | |
47 // "If the native pointer is less than 64 bits wide, it is | |
48 // extended as an unsigned number to a Java long." | |
49 result = unsafe.getAddress(address); | |
50 System.out.printf("1: was 0x%x, expected 0x%x\n", result, | |
51 0x0000000080000000L); | |
52 for (int i = 0; i < 1000000; i++) { | |
53 result = unsafe.getAddress(address); | |
54 } | |
55 | |
56 // The code has got compiled, check the result now | |
57 System.out.printf("2: was 0x%x, expected 0x%x\n", result, | |
58 0x0000000080000000L); | |
59 if (result != 0x0000000080000000L) { | |
60 System.out.println("Test Failed"); | |
61 System.exit(97); | |
62 } else { | |
63 System.out.println("Test Passed"); | |
64 } | |
65 } | |
66 static volatile long result; | |
67 } | |
68 |