8199712: Flight Recorder
Reviewed-by: coleenp, ihse, erikj, dsamersoff, mseledtsov, egahlin, mgronlun
Contributed-by: erik.gahlin@oracle.com, markus.gronlund@oracle.com
/*
* Copyright (c) 2013, 2018, 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.
*
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package jdk.jfr.event.runtime;
import static jdk.test.lib.Asserts.assertTrue;
import java.nio.file.Paths;
import java.time.Duration;
import java.util.*;
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;
import sun.hotspot.WhiteBox;
/*
* @test TestSafepointEvents
* @key jfr
* @library /test/lib
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:.
* -XX:+FlightRecorder -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* jdk.jfr.event.runtime.TestSafepointEvents
*/
public class TestSafepointEvents {
static final String[] EVENT_NAMES = new String[] {
EventNames.SafepointBegin,
EventNames.SafepointStateSyncronization,
EventNames.SafepointWaitBlocked,
EventNames.SafepointCleanup,
EventNames.SafepointCleanupTask,
EventNames.SafepointEnd
};
public static void main(String[] args) throws Exception {
Recording recording = new Recording();
for (String name : EVENT_NAMES) {
recording.enable(name).withThreshold(Duration.ofMillis(0));
}
recording.start();
WhiteBox.getWhiteBox().forceSafepoint();
recording.stop();
try {
// Verify that each event type was seen at least once
for (String name : EVENT_NAMES) {
boolean found = false;
for (RecordedEvent event : Events.fromRecording(recording)) {
found = event.getEventType().getName().equals(name);
if (found) {
break;
}
}
assertTrue(found, "Expected event from test [" + name + "]");
}
// Collect all events grouped by safepoint id
SortedMap<Integer, Set<String>> safepointIds = new TreeMap<>();
for (RecordedEvent event : Events.fromRecording(recording)) {
Integer safepointId = event.getValue("safepointId");
if (!safepointIds.containsKey(safepointId)) {
safepointIds.put(safepointId, new HashSet<>());
}
safepointIds.get(safepointId).add(event.getEventType().getName());
}
// The last safepoint may be related to stopping the recording and can thus be
// incomplete - so if there is more than one, ignore the last one
if (safepointIds.size() > 1) {
safepointIds.remove(safepointIds.lastKey());
}
Asserts.assertGreaterThanOrEqual(safepointIds.size(), 1, "At least 1 safepoint must have occured");
// Verify that each safepoint id has an occurence of every event type,
// this ensures that all events related to a given safepoint had the same id
for (Set<String> safepointEvents : safepointIds.values()) {
for (String name : EVENT_NAMES) {
assertTrue(safepointEvents.contains(name), "Expected event '" + name + "' to be present");
}
}
} catch (Throwable e) {
recording.dump(Paths.get("failed.jfr"));
throw e;
} finally {
recording.close();
}
}
}