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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /**
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26 * @test
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27 * @bug 6935022
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28 * @summary Server VM incorrectly breaks out of while loop
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29 *
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30 * @run main Test6935022
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31 */
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32
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33 public class Test6935022 {
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34 public static final void main(String[] args) throws Exception {
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35 Test6935022 test = new Test6935022();
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36
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37 int cnt = 0;
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38
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39 while (cnt < 10000) {
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40 try {
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41 ++cnt;
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42 if ((cnt&1023) == 0)
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43 System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt);
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44 test.loop(2147483647, (cnt&1023));
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45 }
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46
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47 catch (Exception e) {
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48 System.out.println("Caught on iteration " + cnt);
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49 e.printStackTrace();
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50 System.exit(97);
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51 }
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52 }
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53 }
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54
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55 private void loop(int endingRow, int mask) throws Exception {
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56 int rows = 1;
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57 boolean next = true;
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58
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59 while(rows <= endingRow && next) {
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60 rows++;
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61 if (rows == mask)
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62 System.out.println("Rows="+rows+", end="+endingRow+", next="+next);
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63 next = next(rows);
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64 }
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65
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66 if (next)
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67 throw new Exception("Ended on rows(no rs): " + rows);
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68 }
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69
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70 private boolean next(int rows) {
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71 return rows < 12;
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72 }
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73 }
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74
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