77 lines
3.0 KiB
Java
77 lines
3.0 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2022, Alibaba Group Holding Limited. 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.g1;
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/*
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* @test TestRemarkCleanupMXBean
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* @bug 8297247
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* @summary Test that Remark and Cleanup are correctly reported by
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* a GarbageCollectorMXBean
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* @requires vm.gc.G1
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* @library /test/lib /
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* @build jdk.test.whitebox.WhiteBox
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -XX:+UseG1GC -Xlog:gc
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* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* gc.g1.TestRemarkCleanupMXBean
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*/
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import static jdk.test.whitebox.WhiteBox.getWhiteBox;
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import java.lang.management.GarbageCollectorMXBean;
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import java.lang.management.ManagementFactory;
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import jdk.test.whitebox.WhiteBox;
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import jdk.test.whitebox.gc.GC;
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public class TestRemarkCleanupMXBean {
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public static void main(String[] args) throws Exception {
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GarbageCollectorMXBean g1ConcGCBean = null;
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String expectedName = "G1 Concurrent GC";
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for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
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if (expectedName.equals(bean.getName())) {
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g1ConcGCBean = bean;
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break;
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}
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}
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if (g1ConcGCBean == null) {
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throw new RuntimeException("Unable to find GC bean: " + expectedName);
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}
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long before = g1ConcGCBean.getCollectionCount();
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getWhiteBox().g1RunConcurrentGC();
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long after = g1ConcGCBean.getCollectionCount();
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if (after >= before + 2) { // Must report a Remark and a Cleanup
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System.out.println(g1ConcGCBean.getName() + " reports a difference " +
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after + " - " + before + " = " + (after - before));
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} else {
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throw new RuntimeException("Remark or Cleanup not reported by " +
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g1ConcGCBean.getName());
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}
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}
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}
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