1 /*

     2  * Copyright (c) 2018, Red Hat, Inc. 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  * @test

    26  * @bug 8200282

    27  * @summary arraycopy converted as a series of loads/stores uses wrong slice for loads

    28  *

    29  * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,ACasLoadsStoresBadMem::not_inlined  ACasLoadsStoresBadMem

    30  *

    31  */

    32 

    33 public class ACasLoadsStoresBadMem {

    34     public static void main(String[] args) {

    35         int[] dst = new int[5];

    36         for (int i = 0; i < 20_000; i++) {

    37             test1(dst, 1);

    38             for (int j = 1; j < 5; j++) {

    39                 if (dst[j] != j) {

    40                     throw new RuntimeException("Bad copy ");

    41                 }

    42             }

    43         }

    44     }

    45 

    46     private static void test1(int[] dst, int dstPos) {

    47         int[] src = new int[4];

    48         not_inlined();

    49         src[0] = 1;

    50         src[1] = 2;

    51         src[2] = 3;

    52         src[3] = 4;

    53         System.arraycopy(src, 0, dst, dstPos, 4);

    54     }

    55 

    56     private static void not_inlined() {

    57     }

    58 }