Synch2.java revision 6073:cea72c2bf071 
1/*
2 * Copyright (c) 2003, 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 4892913
27 * @summary     Subject.getPrivateCredentials not thread-safe against changes to
28 *              principals
29 * @run main/othervm/policy=Synch2.policy Synch2
30 */
31
32import java.util.Iterator;
33import java.util.Set;
34import javax.security.auth.Subject;
35import javax.security.auth.x500.X500Principal;
36
37public class Synch2 {
38    static volatile boolean finished = false;
39    public static void main(String[] args) {
40        System.setSecurityManager(new SecurityManager());
41        Subject subject = new Subject();
42        final Set principals = subject.getPrincipals();
43        principals.add(new X500Principal("CN=Alice"));
44        final Set credentials = subject.getPrivateCredentials();
45        credentials.add("Dummy credential");
46        new Thread() {
47            {
48                start();
49            }
50            public void run() {
51                X500Principal p = new X500Principal("CN=Bob");
52                while (!finished) {
53                    principals.add(p);
54                    principals.remove(p);
55                }
56            }
57        };
58        for (int i = 0; i < 1000; i++) {
59            synchronized (credentials) {
60                for (Iterator it = credentials.iterator(); it.hasNext(); ) {
61                    it.next();
62                }
63            }
64        }
65        finished = true;
66    }
67}
68