1 /*

     2  * Copyright (c) 2010, 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

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    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.

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    23 

    24 /**

    25  * @test

    26  * @bug 6968348

    27  * @summary Byteswapped memory access can point to wrong location after JIT

    28  * @modules java.base/jdk.internal.misc

    29  *

    30  * @run main compiler.c2.Test6968348

    31  */

    32 

    33 package compiler.c2;

    34 

    35 import jdk.internal.misc.Unsafe;

    36 

    37 import java.lang.reflect.Field;

    38 

    39 public class Test6968348 {

    40     static Unsafe unsafe = Unsafe.getUnsafe();

    41     static final long[] buffer = new long[4096];

    42     static int array_long_base_offset;

    43 

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

    45         array_long_base_offset = unsafe.arrayBaseOffset(long[].class);

    46 

    47         for (int n = 0; n < 100000; n++) {

    48             test();

    49         }

    50     }

    51 

    52     public static void test() {

    53         for (long i = array_long_base_offset; i < 4096; i += 8) {

    54             unsafe.putLong(buffer, i, Long.reverseBytes(i));

    55         }

    56     }

    57 }