Mercurial > hg > graal-compiler

comparison test/compiler/6968348/Test6968348.java @ 1827:52e82a6bedaf

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6968348: Byteswapped memory access can point to wrong location after JIT Reviewed-by: twisti, kvn, iveresov
author never
date Mon, 04 Oct 2010 17:09:18 -0700
parents
children
comparison
equal deleted inserted replaced
1826:56601ef83436 1827:52e82a6bedaf
1 /*
2 * Copyright (c) 2010, 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 /**
26 * @test
27 * @bug 6968348
28 * @summary Byteswapped memory access can point to wrong location after JIT
29 *
30 * @run main Test6968348
31 */
32
33 import sun.misc.Unsafe;
34 import java.lang.reflect.*;
35
36 public class Test6968348 {
37 static Unsafe unsafe;
38 static final long[] buffer = new long[4096];
39 static int array_long_base_offset;
40
41 public static void main(String[] args) throws Exception {
42 Class c = Test6968348.class.getClassLoader().loadClass("sun.misc.Unsafe");
43 Field f = c.getDeclaredField("theUnsafe");
44 f.setAccessible(true);
45 unsafe = (Unsafe)f.get(c);
46 array_long_base_offset = unsafe.arrayBaseOffset(long[].class);
47
48 for (int n = 0; n < 100000; n++) {
49 test();
50 }
51 }
52
53 public static void test() {
54 for (long i = array_long_base_offset; i < 4096; i += 8) {
55 unsafe.putLong(buffer, i, Long.reverseBytes(i));
56 }
57 }
58 }