127 lines
4.8 KiB
Java
127 lines
4.8 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.List;
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import java.lang.management.ManagementFactory;
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import java.lang.management.MemoryManagerMXBean;
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import java.lang.management.MemoryPoolMXBean;
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import java.lang.management.MemoryUsage;
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import java.lang.management.RuntimeMXBean;
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import java.lang.management.ManagementFactory;
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/* @test TestMetaspaceMemoryPool
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* @bug 8000754
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* @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a
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* MemoryManagerMXBean is created.
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers TestMetaspaceMemoryPool
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:ClassMetaspaceSize=60m TestMetaspaceMemoryPool
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*/
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public class TestMetaspaceMemoryPool {
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public static void main(String[] args) {
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verifyThatMetaspaceMemoryManagerExists();
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verifyMemoryPool(getMemoryPool("Metaspace"), isFlagDefined("MaxMetaspaceSize"));
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if (runsOn64bit()) {
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if (usesCompressedOops()) {
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MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space");
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verifyMemoryPool(cksPool, true);
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}
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}
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}
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private static boolean runsOn64bit() {
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return !System.getProperty("sun.arch.data.model").equals("32");
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}
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private static boolean usesCompressedOops() {
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return isFlagDefined("+UseCompressedOops");
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}
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private static boolean isFlagDefined(String name) {
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RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
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List<String> args = runtimeMxBean.getInputArguments();
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for (String arg : args) {
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if (arg.startsWith("-XX:" + name)) {
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return true;
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}
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}
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return false;
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}
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private static void verifyThatMetaspaceMemoryManagerExists() {
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List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
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for (MemoryManagerMXBean manager : managers) {
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if (manager.getName().equals("Metaspace Manager")) {
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return;
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}
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}
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throw new RuntimeException("Expected to find a metaspace memory manager");
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}
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private static MemoryPoolMXBean getMemoryPool(String name) {
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List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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for (MemoryPoolMXBean pool : pools) {
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if (pool.getName().equals(name)) {
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return pool;
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}
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}
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throw new RuntimeException("Expected to find a memory pool with name " + name);
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}
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private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
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MemoryUsage mu = pool.getUsage();
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assertDefined(mu.getInit(), "init");
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assertDefined(mu.getUsed(), "used");
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assertDefined(mu.getCommitted(), "committed");
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if (isMaxDefined) {
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assertDefined(mu.getMax(), "max");
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} else {
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assertUndefined(mu.getMax(), "max");
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}
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}
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private static void assertDefined(long value, String name) {
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assertTrue(value != -1, "Expected " + name + " to be defined");
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}
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private static void assertUndefined(long value, String name) {
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assertEquals(value, -1, "Expected " + name + " to be undefined");
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}
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private static void assertEquals(long actual, long expected, String msg) {
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assertTrue(actual == expected, msg);
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}
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private static void assertTrue(boolean condition, String msg) {
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if (!condition) {
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throw new RuntimeException(msg);
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}
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}
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}
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