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 }