| /* |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4893489 |
| * @summary Subject.doAs not thread-safe against changes to principals |
| */ |
| |
| import java.security.Principal; |
| import java.security.PrivilegedAction; |
| import java.util.Collections; |
| import java.util.Set; |
| import javax.security.auth.Subject; |
| import javax.security.auth.x500.X500Principal; |
| |
| public class Synch { |
| static volatile boolean finished = false; |
| public static void main(String[] args) { |
| Subject subject = new Subject(); |
| final Set principals = subject.getPrincipals(); |
| principals.add(new X500Principal("CN=Alice")); |
| new Thread() { |
| public void run() { |
| Principal last = new X500Principal("CN=Bob"); |
| for (int i = 0; !finished; i++) { |
| Principal next = new X500Principal("CN=Bob" + i); |
| principals.add(next); |
| principals.remove(last); |
| last = next; |
| } |
| } |
| }.start(); |
| for (int i = 0; i < 1000; i++) { |
| Subject.doAs( |
| subject, |
| new PrivilegedAction() { |
| public Object run() { |
| return Subject.doAs( |
| new Subject(true, |
| Collections.singleton( |
| new X500Principal("CN=Claire")), |
| Collections.EMPTY_SET, |
| Collections.EMPTY_SET), |
| new PrivilegedAction() { |
| public Object run() { |
| return null; |
| } |
| }); |
| } |
| }); |
| } |
| finished = true; |
| } |
| } |