1 /*

     2  * Copyright (c) 2012 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  * @test

    25  * @bug 7188755

    26  * @run main/othervm MultiThreadedSystemProxies

    27  * @summary Crash due to missing synchronization on gconf_client in

    28  *          DefaultProxySelector.c

    29  */

    30 import java.net.ProxySelector;

    31 import java.net.URI;

    32 

    33 /* Racey test, not guaranteed to fail, but if it does we have a problem. */

    34 

    35 public class MultiThreadedSystemProxies {

    36     static final int NUM_THREADS = 100;

    37 

    38     public static void main(String[] args) throws Exception {

    39         System.setProperty("java.net.useSystemProxies", "true");

    40         final ProxySelector ps = ProxySelector.getDefault();

    41         final URI uri = new URI("http://ubuntu.com");

    42         Thread[] threads = new Thread[NUM_THREADS];

    43 

    44         for (int i = 0; i < NUM_THREADS; i++) {

    45             threads[i] = new Thread(new Runnable() {

    46                 @Override

    47                 public void run() {

    48                     try {

    49                         ps.select(uri);

    50                     } catch (Exception x) {

    51                         throw new RuntimeException(x);

    52                     }

    53                 }

    54             });

    55         }

    56         for (int i = 0; i < NUM_THREADS; i++) {

    57             threads[i].start();

    58         }

    59         for (int i = 0; i < NUM_THREADS; i++) {

    60             threads[i].join();

    61         }

    62     }

    63 }