/*
* Copyright ( c ) 2013 , 2019 , 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 .
*
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*/
package jdk.jfr.event.runtime;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
import java.util.stream.Collectors;
import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;
/**
* @ test
* @ key jfr
* @ requires vm . gc = = " Serial " | vm . gc = = null
* @ requires vm . hasJFR
* @ library / test / lib
* @ run driver jdk . jfr . event . runtime . TestVMInfoEvent generateFlagsFile
* @ run main / othervm - XX : Flags = TestVMInfoEvent . flags - Xmx500m jdk . jfr . event . runtime . TestVMInfoEvent arg1 arg2
*/
public class TestVMInfoEvent {
private final static String EVENT_NAME = EventNames.JVMInformation;
public static void main(String[] args) throws Exception {
if ( (args.length > 0 ) && ("generateFlagsFile" .equals(args[0 ])) ) {
generateFlagsFile();
return ;
}
RuntimeMXBean mbean = ManagementFactory.getRuntimeMXBean();
Recording recording = new Recording();
recording.enable(EVENT_NAME);
recording.start();
recording.stop();
List<RecordedEvent> events = Events.fromRecording(recording);
Events.hasEvents(events);
for (RecordedEvent event : events) {
System.out.println("Event:" + event);
Events.assertField(event, "jvmName" ).equal(mbean.getVmName());
String jvmVersion = Events.assertField(event, "jvmVersion" ).notEmpty().getValue();
if (!jvmVersion.contains(mbean.getVmVersion())) {
Asserts.fail(String.format("%s does not contain %s" , jvmVersion, mbean.getVmVersion()));
}
String jvmArgs = Events.assertField(event, "jvmArguments" ).notNull().getValue();
String jvmFlags = Events.assertField(event, "jvmFlags" ).notNull().getValue();
Long pid = Events.assertField(event, "pid" ).atLeast(0 L).getValue();
Asserts.assertEquals(pid, ProcessHandle.current().pid());
String eventArgs = (jvmFlags.trim() + " " + jvmArgs).trim();
String beanArgs = mbean.getInputArguments().stream().collect(Collectors.joining(" " ));
Asserts.assertEquals(eventArgs, beanArgs, "Wrong inputArgs" );
final String javaCommand = mbean.getSystemProperties().get("sun.java.command" );
Events.assertField(event, "javaArguments" ).equal(javaCommand);
Events.assertField(event, "jvmStartTime" ).equal(mbean.getStartTime());
}
}
public static void generateFlagsFile() throws Exception {
Files.writeString(Paths.get("" , "TestVMInfoEvent.flags" ), "+UseSerialGC" );
}
}
Messung V0.5 in Prozent C=98 H=84 G=91
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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