Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/compiler/6968348/Test6968348.java	Wed Apr 27 01:25:04 2016 +0800
     1.3 @@ -0,0 +1,58 @@
     1.4 +/*
     1.5 + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +/**
    1.29 + * @test
    1.30 + * @bug 6968348
    1.31 + * @summary Byteswapped memory access can point to wrong location after JIT
    1.32 + *
    1.33 + * @run main Test6968348
    1.34 + */
    1.35 +
    1.36 +import sun.misc.Unsafe;
    1.37 +import java.lang.reflect.*;
    1.38 +
    1.39 +public class Test6968348 {
    1.40 +    static Unsafe unsafe;
    1.41 +    static final long[] buffer = new long[4096];
    1.42 +    static int array_long_base_offset;
    1.43 +
    1.44 +    public static void main(String[] args) throws Exception {
    1.45 +        Class c = Test6968348.class.getClassLoader().loadClass("sun.misc.Unsafe");
    1.46 +        Field f = c.getDeclaredField("theUnsafe");
    1.47 +        f.setAccessible(true);
    1.48 +        unsafe = (Unsafe)f.get(c);
    1.49 +        array_long_base_offset = unsafe.arrayBaseOffset(long[].class);
    1.50 +
    1.51 +        for (int n = 0; n < 100000; n++) {
    1.52 +            test();
    1.53 +        }
    1.54 +    }
    1.55 +
    1.56 +    public static void test() {
    1.57 +        for (long i = array_long_base_offset; i < 4096; i += 8) {
    1.58 +            unsafe.putLong(buffer, i, Long.reverseBytes(i));
    1.59 +        }
    1.60 +    }
    1.61 +}