SynchronizedAccess.java revision 12245:2f69eb7d4b90 
1/*
2 * Copyright (c) 1999, 2015, 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 4162583 7054918
27 * @library ../testlibrary
28 * @summary Make sure Provider api implementations are synchronized properly
29 */
30
31import java.security.*;
32
33public class SynchronizedAccess {
34
35    public static void main(String[] args) throws Exception {
36        ProvidersSnapshot snapshot = ProvidersSnapshot.create();
37        try {
38            main0(args);
39        } finally {
40            snapshot.restore();
41        }
42    }
43
44    public static void main0(String[] args) throws Exception {
45        AccessorThread[] acc = new AccessorThread[200];
46        for (int i=0; i < acc.length; i++)
47            acc[i] = new AccessorThread("thread"+i);
48        for (int i=0; i < acc.length; i++)
49            acc[i].start();
50        for (int i=0; i < acc.length; i++)
51            acc[i].join();
52    }
53}
54
55class AccessorThread extends Thread {
56
57    public AccessorThread(String str) {
58        super(str);
59    }
60
61    public void run() {
62        Provider[] provs = new Provider[10];
63        for (int i=0; i < provs.length; i++)
64            provs[i] = new MyProvider("name"+i, 1, "test");
65
66        int rounds = 20;
67        while (rounds-- > 0) {
68            try {
69                for (int i=0; i<provs.length; i++) {
70                    Security.addProvider(provs[i]);
71                }
72                Signature sig = Signature.getInstance("sigalg");
73                for (int i=0; i<provs.length; i++) {
74                    Security.removeProvider("name"+i);
75                }
76                provs = Security.getProviders();
77            } catch (NoSuchAlgorithmException nsae) {
78            }
79
80            try {
81                Thread.sleep(5);
82            } catch (InterruptedException ie) {
83            }
84        } // while
85    }
86}
87
88class MyProvider extends Provider {
89    public MyProvider(String name, double version, String info) {
90        super(name, version, info);
91        put("Signature.sigalg", "sigimpl");
92    }
93}
94