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8222001: JFR event for heap dumps written
Reviewed-by: mgronlun
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| /* | ||
| * Copyright (c) 2020, 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. Oracle designates this | ||
| * particular file as subject to the "Classpath" exception as provided | ||
| * by Oracle in the LICENSE file that accompanied this code. | ||
| * | ||
| * 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. | ||
| */ | ||
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| package jdk.jfr.event.diagnostics; | ||
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| import java.lang.management.ManagementFactory; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.util.List; | ||
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| import javax.management.MBeanServer; | ||
| import javax.management.ObjectName; | ||
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| import jdk.jfr.Recording; | ||
| import jdk.jfr.consumer.RecordedEvent; | ||
| import jdk.test.lib.jfr.EventNames; | ||
| import jdk.test.lib.jfr.Events; | ||
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| /** | ||
| * @test | ||
| * @key jfr | ||
| * @requires vm.hasJFR | ||
| * @library /test/lib | ||
| * @modules java.management | ||
| * @run main/othervm jdk.jfr.event.diagnostics.TestHeapDump | ||
| */ | ||
| public class TestHeapDump { | ||
| private final static String EVENT_NAME = EventNames.HeapDump; | ||
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| public static void main(String[] args) throws Exception { | ||
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| Path path = Paths.get("dump.hprof").toAbsolutePath(); | ||
| try (Recording r = new Recording()) { | ||
| r.enable(EVENT_NAME); | ||
| r.start(); | ||
| heapDump(path); | ||
| r.stop(); | ||
| List<RecordedEvent> events = Events.fromRecording(r); | ||
| if (events.size() != 1) { | ||
| throw new Exception("Expected one event, got " + events.size()); | ||
| } | ||
| RecordedEvent e = events.get(0); | ||
| Events.assertField(e, "destination").equal(path.toString()); | ||
| Events.assertField(e, "gcBeforeDump").equal(true); | ||
| Events.assertField(e, "onOutOfMemoryError").equals(false); | ||
| Events.assertField(e, "size").equals(Files.size(path)); | ||
| System.out.println(e); | ||
| } | ||
| } | ||
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| private static void heapDump(Path path) throws Exception { | ||
| ObjectName objectName = new ObjectName("com.sun.management:type=HotSpotDiagnostic"); | ||
| MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer(); | ||
| Object[] parameters = new Object[2]; | ||
| parameters[0] = path.toString(); | ||
| parameters[1] = true; | ||
| String[] signature = new String[] { String.class.getName(), boolean.class.toString() }; | ||
| mbeanServer.invoke(objectName, "dumpHeap", parameters, signature); | ||
| } | ||
| } |