1 /*

     2  * Copyright 2009 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 6855164

    27  * @summary SIGSEGV during compilation of method involving loop over CharSequence

    28  * @run main/othervm -Xbatch Test

    29  */

    30 

    31 public class Test{

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

    33         StringBuffer builder = new StringBuffer();

    34 

    35         for(int i = 0; i < 100; i++)

    36             builder.append("I am the very model of a modern major general\n");

    37 

    38         for(int j = 0; j < builder.length(); j++){

    39             previousSpaceIndex(builder, j);

    40         }

    41     }

    42 

    43     private static final int previousSpaceIndex(CharSequence sb, int seek) {

    44         seek--;

    45         while (seek > 0) {

    46             if (sb.charAt(seek) == ' ') {

    47                 while (seek > 0 && sb.charAt(seek - 1) == ' ')

    48                     seek--;

    49                 return seek;

    50             }

    51             seek--;

    52         }

    53         return 0;

    54     }

    55 }