/* * 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 4892841 * @summary Subject.getPrincipals(Class) not thread-safe against changes to * principals */ import java.util.Set; import javax.security.auth.Subject; import javax.security.auth.x500.X500Principal; public class Synch3 { 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() { { start(); } public void run() { X500Principal p = new X500Principal("CN=Bob"); while (!finished) { principals.add(p); principals.remove(p); } } }; for (int i = 0; i < 1000; i++) { subject.getPrincipals(X500Principal.class); } finished = true; } }