Test6935022.java revision 12158:0fe2815ffa74 
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 * @test
26 * @bug 6935022
27 * @summary Server VM incorrectly breaks out of while loop
28 *
29 * @run main compiler.c2.Test6935022
30 */
31
32package compiler.c2;
33
34public class Test6935022 {
35    public static final void main(String[] args) throws Exception {
36        Test6935022 test = new Test6935022();
37
38        int cnt = 0;
39
40        while (cnt < 10000) {
41            try {
42                ++cnt;
43                if ((cnt&1023) == 0)
44                  System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt);
45                test.loop(2147483647, (cnt&1023));
46            }
47
48            catch (Exception e) {
49                System.out.println("Caught on iteration " + cnt);
50                e.printStackTrace();
51                System.exit(97);
52            }
53        }
54    }
55
56    private void loop(int endingRow, int mask) throws Exception {
57        int rows = 1;
58        boolean next = true;
59
60        while(rows <= endingRow && next) {
61            rows++;
62            if (rows == mask)
63              System.out.println("Rows="+rows+", end="+endingRow+", next="+next);
64            next = next(rows);
65        }
66
67        if (next)
68            throw new Exception("Ended on rows(no rs): " + rows);
69    }
70
71    private boolean next(int rows) {
72        return rows < 12;
73    }
74}
75
76