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 }