1 /*
   2  * Copyright (c) 2017 Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /**
  25  * @test TestMemoryPools
  26  * @key gc
  27  * @summary Test JMX memory pools
  28  * @modules java.base/jdk.internal.misc
  29  *          java.management
  30  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xmx1g -Xms1g TestMemoryPools
  31  */
  32 
  33 import java.lang.management.*;
  34 import java.util.*;
  35 
  36 public class TestMemoryPools {
  37 
  38     public static void main(String[] args) throws Exception {
  39         List<MemoryManagerMXBean> mms = ManagementFactory.getMemoryManagerMXBeans();
  40         if (mms == null) {
  41             throw new RuntimeException("getMemoryManagerMXBeans is null");
  42         }
  43         if (mms.isEmpty()) {
  44             throw new RuntimeException("getMemoryManagerMXBeans is empty");
  45         }
  46         for (MemoryManagerMXBean mmBean : mms) {
  47             String[] names = mmBean.getMemoryPoolNames();
  48             if (names == null) {
  49                 throw new RuntimeException("getMemoryPoolNames() is null");
  50             }
  51             if (names.length == 0) {
  52                 throw new RuntimeException("getMemoryPoolNames() is empty");
  53             }
  54             for (String name : names) {
  55                 if (name == null) {
  56                     throw new RuntimeException("pool name is null");
  57                 }
  58                 if (name.length() == 0) {
  59                     throw new RuntimeException("pool name is empty");
  60                 }
  61             }
  62         }
  63     }
  64 }