1 /*

     2  * Copyright (c) 1999, 2016, 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.

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    23 

    24 /*

    25  * @test

    26  * @bug 4162583 7054918 8130181

    27  * @library ../testlibrary

    28  * @summary Make sure Provider api implementations are synchronized properly

    29  */

    30 

    31 import java.security.*;

    32 

    33 public 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 

    55 class 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 

    88 class MyProvider extends Provider {

    89     public MyProvider(String name, String version, String info) {

    90         super(name, version, info);

    91         put("Signature.sigalg", "sigimpl");

    92     }

    93 }