test/hotspot/jtreg/compiler/c2/Test6968348.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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/**
 * @test
 * @bug 6968348
 * @summary Byteswapped memory access can point to wrong location after JIT
 * @modules java.base/jdk.internal.misc
 *
 * @run main compiler.c2.Test6968348
 */

package compiler.c2;

import jdk.internal.misc.Unsafe;

import java.lang.reflect.Field;

public class Test6968348 {
    static Unsafe unsafe = Unsafe.getUnsafe();
    static final long[] buffer = new long[4096];
    static int array_long_base_offset;

    public static void main(String[] args) throws Exception {
        array_long_base_offset = unsafe.arrayBaseOffset(long[].class);

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

    public static void test() {
        for (long i = array_long_base_offset; i < 4096; i += 8) {
            unsafe.putLong(buffer, i, Long.reverseBytes(i));
        }
    }
}