Test6724218.java revision 11707:ad7af1afda7a 
1/*
2 * Copyright (c) 2008, 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 6724218
27 * @summary Fix raise_LCA_above_marks() early termination
28 *
29 * @run main/othervm -Xbatch
30 *      -XX:CompileCommand=exclude,compiler.c2.Test6724218::update
31 *      compiler.c2.Test6724218
32 */
33
34package compiler.c2;
35
36public class Test6724218 {
37    Test6724218 next  = null;
38    Object value = null;
39
40    static boolean _closed = false;
41    static int size = 0;
42    static Test6724218 list  = null;
43    static int cache_size = 0;
44    static Test6724218 cache = null;
45
46    Object get(int i) {
47        Test6724218 t = list;
48        list = t.next;
49        size -= 1;
50        Object o = t.value;
51        if (i > 0) {
52            t.next = cache;
53            t.value = null;
54            cache = t;
55            cache_size = +1;
56        }
57        return o;
58    }
59
60    void update() {
61        // Exclude compilation of this one.
62        if (size == 0) {
63            Test6724218 t;
64            if (cache_size > 0) {
65                t = cache;
66                cache = t.next;
67                cache_size = -1;
68            } else {
69                t = new Test6724218();
70            }
71            t.value = new Object();
72            t.next = list;
73            list = t;
74            size += 1;
75        }
76    }
77
78    synchronized Object test(int i) {
79        while (true) {
80            if (_closed) {
81                return null;
82            } else if (size > 0) {
83                return get(i);
84            }
85            update();
86        }
87    }
88
89    public static void main(String argv[]) throws Exception {
90        Test6724218 t = new Test6724218();
91        int lim = 500000;
92        Object o;
93        for (int j = 0; j < lim; j++) {
94            o = t.test(j&1);
95            if (o == null) {
96              throw new Exception("*** Failed on iteration " + j);
97            }
98            if ((j&1) == 0) {
99              t.update();
100            }
101        }
102    }
103}
104