jdk8-mips64-public/hotspot: test/compiler/7179138/Test7179138

     1 /*

     2  * Copyright 2012 Skip Balk.  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  */

    24 /*

    25  * @test

    26  * @bug 7179138

    27  * @summary Incorrect result with String concatenation optimization

    28  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation Test7179138_1

    29  *

    30  * @author Skip Balk

    31  */

    33 public class Test7179138_1 {

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

    35         System.out.println("Java Version: " + System.getProperty("java.vm.version"));

    36         long[] durations = new long[60];

    37         for (int i = 0; i < 100000; i++) {

    38             // this empty for-loop is required to reproduce this bug

    39             for (long duration : durations) {

    40                 // do nothing

    41             }

    42             {

    43                 String s = "test";

    44                 int len = s.length();

    46                 s = new StringBuilder(String.valueOf(s)).append(s).toString();

    47                 len = len + len;

    49                 s = new StringBuilder(String.valueOf(s)).append(s).toString();

    50                 len = len + len;

    52                 s = new StringBuilder(String.valueOf(s)).append(s).toString();

    53                 len = len + len;

    55                 if (s.length() != len) {

    56                     System.out.println("Failed at iteration: " + i);

    57                     System.out.println("Length mismatch: " + s.length() + " <> " + len);

    58                     System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\"");

    59                     System.out.println("Actual:   \"" + s + "\"");

    60                     System.exit(97);

    61                 }

    62             }

    63         }

    64     }

    65 }

test/compiler/7179138/Test7179138_1.java@5201379fe487