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