1 /*

     2  * Copyright (c) 2019, 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 8231387

    27  * @library ../testlibrary

    28  * @summary make sure getService() avoids a race

    29  * @author Tianmin Shi

    30  */

    31 

    32 import java.security.Provider;

    33 

    34 public class GetServiceRace {

    35 

    36     private static final Provider testProvider;

    37     static {

    38         testProvider = new Provider("MyProvider", 1.0, "test") {

    39         };

    40         testProvider.put("CertificateFactory.Fixed", "MyCertificateFactory");

    41     }

    42 

    43     private static final int NUMBER_OF_RETRIEVERS = 3;

    44     private static final int TEST_TIME_MS = 1000;

    45 

    46     public static boolean testFailed = false;

    47 

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

    49         Updater updater = new Updater();

    50         updater.start();

    51         Retriever [] retrievers = new Retriever[NUMBER_OF_RETRIEVERS];

    52         for (int i=0; i<retrievers.length; i++) {

    53             retrievers[i] = new Retriever();

    54             retrievers[i].start();

    55         }

    56         Thread.sleep(TEST_TIME_MS);

    57         System.out.println("Interrupt");

    58         updater.interrupt();

    59         updater.join();

    60         for (int i=0; i<retrievers.length; i++) {

    61             retrievers[i].interrupt();

    62             retrievers[i].join();

    63         }

    64         System.out.println("Done");

    65         if (testFailed) {

    66             throw new Exception("Test Failed");

    67         }

    68         System.out.println("Test Passed");

    69     }

    70 

    71     private static class Updater extends Thread {

    72         @Override

    73         public void run() {

    74             while (!isInterrupted()) {

    75                 testProvider.put("CertificateFactory.Added", "MyCertificateFactory");

    76             }

    77             System.out.println("Updater stopped");

    78         }

    79     }

    80 

    81     private static class Retriever extends Thread {

    82         @Override

    83         public void run() {

    84             while (!isInterrupted()) {

    85                 Provider.Service service = testProvider.getService("CertificateFactory", "Fixed");

    86                 if (service == null) {

    87                     if (!testFailed) {

    88                         System.err.println("CertificateFactory.Fixed is NULL");

    89                         testFailed = true;

    90                     }

    91                 } else {

    92                     //System.out.println("CertificateFactory.Fixed is good");

    93                 }

    94             }

    95             System.out.println("Retriever stopped");

    96         }

    97     }

    98 }