1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. 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 /**
  26  * @test
  27  * @bug 6935022
  28  * @summary Server VM incorrectly breaks out of while loop
  29  *
  30  * @run main Test6935022
  31  */
  32 
  33 public class Test6935022 {
  34     public static final void main(String[] args) throws Exception {
  35         Test6935022 test = new Test6935022();
  36 
  37         int cnt = 0;
  38 
  39         while (cnt < 10000) {
  40             try {
  41                 ++cnt;
  42                 if ((cnt&1023) == 0)
  43                   System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt);
  44                 test.loop(2147483647, (cnt&1023));
  45             }
  46 
  47             catch (Exception e) {
  48                 System.out.println("Caught on iteration " + cnt);
  49                 e.printStackTrace();
  50                 System.exit(97);
  51             }
  52         }
  53     }
  54 
  55     private void loop(int endingRow, int mask) throws Exception {
  56         int rows = 1;
  57         boolean next = true;
  58 
  59         while(rows <= endingRow && next) {
  60             rows++;
  61             if (rows == mask)
  62               System.out.println("Rows="+rows+", end="+endingRow+", next="+next);
  63             next = next(rows);
  64         }
  65 
  66         if (next)
  67             throw new Exception("Ended on rows(no rs): " + rows);
  68     }
  69 
  70     private boolean next(int rows) {
  71         return rows < 12;
  72     }
  73 }
  74