1 /*
 2  * Copyright (c) 2017, 2018, Red Hat, Inc. 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 /**
26  * @test
27  * @summary Test JMX memory pools
28  * @requires vm.gc.Shenandoah
29  * @modules java.base/jdk.internal.misc
30  *          java.management
31  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx1g -Xms1g TestMemoryPools
32  */
33 
34 import java.lang.management.*;
35 import java.util.*;
36 
37 public class TestMemoryPools {
38 
39     public static void main(String[] args) throws Exception {
40         List<MemoryManagerMXBean> mms = ManagementFactory.getMemoryManagerMXBeans();
41         if (mms == null) {
42             throw new RuntimeException("getMemoryManagerMXBeans is null");
43         }
44         if (mms.isEmpty()) {
45             throw new RuntimeException("getMemoryManagerMXBeans is empty");
46         }
47         for (MemoryManagerMXBean mmBean : mms) {
48             String[] names = mmBean.getMemoryPoolNames();
49             if (names == null) {
50                 throw new RuntimeException("getMemoryPoolNames() is null");
51             }
52             if (names.length == 0) {
53                 throw new RuntimeException("getMemoryPoolNames() is empty");
54             }
55             for (String name : names) {
56                 if (name == null) {
57                     throw new RuntimeException("pool name is null");
58                 }
59                 if (name.length() == 0) {
60                     throw new RuntimeException("pool name is empty");
61                 }
62             }
63         }
64     }
65 }