1/*
2 * Copyright (c) 2012, 2015, 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 * Portions Copyright (c) 2012 IBM Corporation
26 */
27
28/**
29 * @test
30 * @bug 7164191
31 * @summary properties.putAll API may fail with ConcurrentModifcationException on multi-thread scenario
32 * @modules jdk.management.agent/jdk.internal.agent
33 * @author Deven You
34 */
35
36import java.util.Properties;
37import jdk.internal.agent.Agent;
38
39public class AgentCMETest {
40    static Class<?> agentClass;
41
42    /**
43     * In jdk.internal.agent.Agent.loadManagementProperties(), call
44     * properties.putAll API may fail with ConcurrentModifcationException if the
45     * system properties are modified simultaneously by another thread
46     *
47     * @param args
48     * @throws Exception
49     */
50    public static void main(String[] args) throws Exception {
51        System.out.println("Start...");
52
53        final Properties properties = System.getProperties();
54        Thread t1 = new Thread(new Runnable() {
55            public void run() {
56                for (int i = 0; i < 100; i++) {
57                    properties.put(String.valueOf(i), "");
58                    try {
59                        Thread.sleep(1);
60                    } catch (InterruptedException e) {
61                        // do nothing
62                    }
63                }
64            }
65        });
66        t1.start();
67
68        for (int i = 0; i < 10000; i++) {
69            Agent.loadManagementProperties();
70        }
71
72        System.out.println("Finished...");
73    }
74}
75