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