131 lines
4.7 KiB
Java
131 lines
4.7 KiB
Java
/*
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* Copyright (c) 2014, 2019, 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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package gc.class_unloading;
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/*
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* @test
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* @key gc
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* @bug 8049831
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* @requires !vm.graal.enabled
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build sun.hotspot.WhiteBox
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* @run driver gc.class_unloading.TestCMSClassUnloadingEnabledHWM
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* @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated.
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import java.lang.management.GarbageCollectorMXBean;
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import java.lang.management.ManagementFactory;
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import sun.hotspot.WhiteBox;
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public class TestCMSClassUnloadingEnabledHWM {
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private static long MetaspaceSize = 32 * 1024 * 1024;
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private static long YoungGenSize = 32 * 1024 * 1024;
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private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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"-Xbootclasspath/a:.",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+WhiteBoxAPI",
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"-Xmx128m",
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"-XX:CMSMaxAbortablePrecleanTime=1",
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"-XX:CMSWaitDuration=50",
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"-XX:MetaspaceSize=" + MetaspaceSize,
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"-Xmn" + YoungGenSize,
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"-XX:+UseConcMarkSweepGC",
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"-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled",
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"-Xlog:gc",
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TestCMSClassUnloadingEnabledHWM.AllocateBeyondMetaspaceSize.class.getName(),
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"" + MetaspaceSize);
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return new OutputAnalyzer(pb.start());
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}
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public static OutputAnalyzer runWithCMSClassUnloading() throws Exception {
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return run(true);
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}
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public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception {
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return run(false);
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}
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public static void testWithoutCMSClassUnloading() throws Exception {
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// -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle.
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OutputAnalyzer out = runWithoutCMSClassUnloading();
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out.shouldMatch(".*Pause Full.*");
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out.shouldNotMatch(".*Pause Initial Mark.*");
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}
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public static void testWithCMSClassUnloading() throws Exception {
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// -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC.
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OutputAnalyzer out = runWithCMSClassUnloading();
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out.shouldMatch(".*Pause Initial Mark.*");
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out.shouldNotMatch(".*Pause Full.*");
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}
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public static void main(String args[]) throws Exception {
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testWithCMSClassUnloading();
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testWithoutCMSClassUnloading();
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}
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public static class AllocateBeyondMetaspaceSize {
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public static void main(String [] args) throws Exception {
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if (args.length != 1) {
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throw new IllegalArgumentException("Usage: <MetaspaceSize>");
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}
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WhiteBox wb = WhiteBox.getWhiteBox();
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// Allocate past the MetaspaceSize limit.
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long metaspaceSize = Long.parseLong(args[0]);
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long allocationBeyondMetaspaceSize = metaspaceSize * 2;
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long metaspace = wb.allocateMetaspace(null, allocationBeyondMetaspaceSize);
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// Wait for at least one GC to occur. The caller will parse the log files produced.
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GarbageCollectorMXBean cmsGCBean = getCMSGCBean();
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while (cmsGCBean.getCollectionCount() == 0) {
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Thread.sleep(100);
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}
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wb.freeMetaspace(null, metaspace, metaspace);
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}
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private static GarbageCollectorMXBean getCMSGCBean() {
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for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans()) {
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if (gcBean.getObjectName().toString().equals("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep")) {
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return gcBean;
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}
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}
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return null;
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}
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}
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}
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