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 * @summary Test JMX memory pools 27 * @key gc 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 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 }