diff -r 000000000000 -r f90c822e73f8 test/compiler/6968348/Test6968348.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/6968348/Test6968348.java Wed Apr 27 01:25:04 2016 +0800 @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * 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 + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +/** + * @test + * @bug 6968348 + * @summary Byteswapped memory access can point to wrong location after JIT + * + * @run main Test6968348 + */ + +import sun.misc.Unsafe; +import java.lang.reflect.*; + +public class Test6968348 { + static Unsafe unsafe; + static final long[] buffer = new long[4096]; + static int array_long_base_offset; + + public static void main(String[] args) throws Exception { + Class c = Test6968348.class.getClassLoader().loadClass("sun.misc.Unsafe"); + Field f = c.getDeclaredField("theUnsafe"); + f.setAccessible(true); + unsafe = (Unsafe)f.get(c); + 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)); + } + } +}