--- /dev/null 2017-11-08 15:25:57.713133075 +0100 +++ new/test/hotspot/jtreg/gc/TestMemoryMXBeansAndPoolsPresence.java 2017-11-28 11:57:15.346641287 +0100 @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +import java.util.List; +import java.util.ArrayList; +import java.lang.management.*; +import static jdk.test.lib.Asserts.*; +import java.util.stream.*; + +/* @test TestMemoryMXBeansAndPoolsPresence + * @bug 8191564 + * @summary Tests that GarbageCollectorMXBeans and GC MemoryPools are created. + * @library /test/lib + * @modules java.base/jdk.internal.misc + * java.management + * @run main/othervm -XX:+UseG1GC TestMemoryMXBeansAndPoolsPresence G1 + * @run main/othervm -XX:+UseConcMarkSweepGC TestMemoryMXBeansAndPoolsPresence CMS + * @run main/othervm -XX:+UseParallelGC TestMemoryMXBeansAndPoolsPresence Parallel + * @run main/othervm -XX:+UseSerialGC TestMemoryMXBeansAndPoolsPresence Serial + */ + +class GCBeanDescription { + public String name; + public String[] poolNames; + + public GCBeanDescription(String name, String[] poolNames) { + this.name = name; + this.poolNames = poolNames; + } +} + +public class TestMemoryMXBeansAndPoolsPresence { + public static void test(GCBeanDescription... expectedBeans) { + List memoryPools = ManagementFactory.getMemoryPoolMXBeans(); + + List gcBeans = ManagementFactory.getGarbageCollectorMXBeans(); + assertEQ(expectedBeans.length, gcBeans.size()); + + for (GCBeanDescription desc : expectedBeans) { + List beans = gcBeans.stream() + .filter(b -> b.getName().equals(desc.name)) + .collect(Collectors.toList()); + assertEQ(beans.size(), 1); + + GarbageCollectorMXBean bean = beans.get(0); + assertEQ(desc.name, bean.getName()); + + String[] pools = bean.getMemoryPoolNames(); + assertEQ(desc.poolNames.length, pools.length); + for (int i = 0; i < desc.poolNames.length; i++) { + assertEQ(desc.poolNames[i], pools[i]); + } + } + } + + public static void main(String[] args) { + switch (args[0]) { + case "G1": + test(new GCBeanDescription("G1 Young Generation", new String[] {"G1 Eden Space", "G1 Survivor Space"}), + new GCBeanDescription("G1 Old Generation", new String[] {"G1 Eden Space", "G1 Survivor Space", "G1 Old Gen"})); + break; + case "CMS": + test(new GCBeanDescription("ParNew", new String[] {"Par Eden Space", "Par Survivor Space"}), + new GCBeanDescription("ConcurrentMarkSweep", new String[] {"Par Eden Space", "Par Survivor Space", "CMS Old Gen"})); + break; + case "Parallel": + test(new GCBeanDescription("PS Scavenge", new String[] {"PS Eden Space", "PS Survivor Space"}), + new GCBeanDescription("PS MarkSweep", new String[] {"PS Eden Space", "PS Survivor Space", "PS Old Gen"})); + break; + case "Serial": + test(new GCBeanDescription("Copy", new String[] {"Eden Space", "Survivor Space"}), + new GCBeanDescription("MarkSweepCompact", new String[] {"Eden Space", "Survivor Space", "Tenured Gen"})); + break; + default: + assertTrue(false); + break; + + } + } +}