author | mgronlun |
Thu, 13 Dec 2018 14:36:54 +0100 | |
changeset 53014 | 339d2fbe8675 |
parent 52334 | a181612f0715 |
child 55256 | 3b22c7e00573 |
child 57360 | 5d043a159d5c |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
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* Copyright (c) 2016, 2018, 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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 jdk.jfr.internal; |
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import static jdk.jfr.internal.LogLevel.INFO; |
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import static jdk.jfr.internal.LogLevel.TRACE; |
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import static jdk.jfr.internal.LogLevel.WARN; |
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import static jdk.jfr.internal.LogTag.JFR; |
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import static jdk.jfr.internal.LogTag.JFR_SYSTEM; |
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import java.io.IOException; |
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import java.security.AccessControlContext; |
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import java.security.AccessController; |
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import java.time.Duration; |
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import java.time.Instant; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
50113 | 42 |
import java.util.HashSet; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.Timer; |
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import java.util.TimerTask; |
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import java.util.concurrent.CopyOnWriteArrayList; |
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import jdk.jfr.EventType; |
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import jdk.jfr.FlightRecorder; |
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import jdk.jfr.FlightRecorderListener; |
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import jdk.jfr.Recording; |
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import jdk.jfr.RecordingState; |
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import jdk.jfr.events.ActiveRecordingEvent; |
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import jdk.jfr.events.ActiveSettingEvent; |
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import jdk.jfr.internal.SecuritySupport.SecureRecorderListener; |
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import jdk.jfr.internal.instrument.JDKEvents; |
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public final class PlatformRecorder { |
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private final List<PlatformRecording> recordings = new ArrayList<>(); |
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private final static List<SecureRecorderListener> changeListeners = new ArrayList<>(); |
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private final Repository repository; |
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private final Timer timer; |
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private final static JVM jvm = JVM.getJVM(); |
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private final EventType activeRecordingEvent; |
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private final EventType activeSettingEvent; |
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private final Thread shutdownHook; |
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private long recordingCounter = 0; |
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private RepositoryChunk currentChunk; |
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public PlatformRecorder() throws Exception { |
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repository = Repository.getRepository(); |
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Logger.log(JFR_SYSTEM, INFO, "Initialized disk repository"); |
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repository.ensureRepository(); |
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jvm.createNativeJFR(); |
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Logger.log(JFR_SYSTEM, INFO, "Created native"); |
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JDKEvents.initialize(); |
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Logger.log(JFR_SYSTEM, INFO, "Registered JDK events"); |
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JDKEvents.addInstrumentation(); |
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startDiskMonitor(); |
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activeRecordingEvent = EventType.getEventType(ActiveRecordingEvent.class); |
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activeSettingEvent = EventType.getEventType(ActiveSettingEvent.class); |
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shutdownHook = SecuritySupport.createThreadWitNoPermissions("JFR: Shutdown Hook", new ShutdownHook(this)); |
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SecuritySupport.setUncaughtExceptionHandler(shutdownHook, new ShutdownHook.ExceptionHandler()); |
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SecuritySupport.registerShutdownHook(shutdownHook); |
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timer = createTimer(); |
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} |
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50113 | 93 |
private static Timer createTimer() { |
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try { |
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List<Timer> result = new CopyOnWriteArrayList<>(); |
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Thread t = SecuritySupport.createThreadWitNoPermissions("Permissionless thread", ()-> { |
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result.add(new Timer("JFR Recording Scheduler", true)); |
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}); |
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t.start(); |
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t.join(); |
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return result.get(0); |
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} catch (InterruptedException e) { |
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throw new IllegalStateException("Not able to create timer task. " + e.getMessage(), e); |
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} |
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} |
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public synchronized PlatformRecording newRecording(Map<String, String> settings) { |
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return newRecording(settings, ++recordingCounter); |
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} |
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50745 | 111 |
// To be used internally when doing dumps. |
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// Caller must have recorder lock and close recording before releasing lock |
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public PlatformRecording newTemporaryRecording() { |
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if(!Thread.holdsLock(this)) { |
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throw new InternalError("Caller must have recorder lock"); |
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} |
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return newRecording(new HashMap<>(), 0); |
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} |
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private synchronized PlatformRecording newRecording(Map<String, String> settings, long id) { |
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PlatformRecording recording = new PlatformRecording(this, id); |
50113 | 122 |
if (!settings.isEmpty()) { |
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recording.setSettings(settings); |
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} |
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recordings.add(recording); |
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return recording; |
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} |
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synchronized void finish(PlatformRecording recording) { |
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if (recording.getState() == RecordingState.RUNNING) { |
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recording.stop("Recording closed"); |
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} |
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recordings.remove(recording); |
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} |
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public synchronized List<PlatformRecording> getRecordings() { |
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return Collections.unmodifiableList(new ArrayList<PlatformRecording>(recordings)); |
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} |
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public synchronized static void addListener(FlightRecorderListener changeListener) { |
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AccessControlContext context = AccessController.getContext(); |
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SecureRecorderListener sl = new SecureRecorderListener(context, changeListener); |
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boolean runInitialized; |
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synchronized (PlatformRecorder.class) { |
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runInitialized = FlightRecorder.isInitialized(); |
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changeListeners.add(sl); |
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} |
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if (runInitialized) { |
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sl.recorderInitialized(FlightRecorder.getFlightRecorder()); |
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} |
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} |
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public synchronized static boolean removeListener(FlightRecorderListener changeListener) { |
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for (SecureRecorderListener s : new ArrayList<>(changeListeners)) { |
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if (s.getChangeListener() == changeListener) { |
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changeListeners.remove(s); |
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return true; |
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} |
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} |
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return false; |
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} |
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static synchronized List<FlightRecorderListener> getListeners() { |
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return new ArrayList<>(changeListeners); |
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} |
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Timer getTimer() { |
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return timer; |
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} |
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public static void notifyRecorderInitialized(FlightRecorder recorder) { |
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Logger.log(JFR_SYSTEM, TRACE, "Notifying listeners that Flight Recorder is initialized"); |
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for (FlightRecorderListener r : getListeners()) { |
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r.recorderInitialized(recorder); |
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} |
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} |
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// called by shutdown hook |
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synchronized void destroy() { |
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try { |
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timer.cancel(); |
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} catch (Exception ex) { |
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Logger.log(JFR_SYSTEM, WARN, "Shutdown hook could not cancel timer"); |
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} |
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for (PlatformRecording p : getRecordings()) { |
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if (p.getState() == RecordingState.RUNNING) { |
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try { |
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p.stop("Shutdown"); |
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} catch (Exception ex) { |
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Logger.log(JFR, WARN, "Recording " + p.getName() + ":" + p.getId() + " could not be stopped"); |
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} |
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} |
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} |
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JDKEvents.remove(); |
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if (jvm.hasNativeJFR()) { |
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if (jvm.isRecording()) { |
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jvm.endRecording_(); |
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} |
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jvm.destroyNativeJFR(); |
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} |
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repository.clear(); |
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} |
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synchronized void start(PlatformRecording recording) { |
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// State can only be NEW or DELAYED because of previous checks |
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Instant now = Instant.now(); |
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recording.setStartTime(now); |
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recording.updateTimer(); |
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Duration duration = recording.getDuration(); |
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if (duration != null) { |
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recording.setStopTime(now.plus(duration)); |
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} |
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boolean toDisk = recording.isToDisk(); |
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boolean beginPhysical = true; |
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for (PlatformRecording s : getRecordings()) { |
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if (s.getState() == RecordingState.RUNNING) { |
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beginPhysical = false; |
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if (s.isToDisk()) { |
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toDisk = true; |
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} |
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} |
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} |
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if (beginPhysical) { |
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RepositoryChunk newChunk = null; |
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if (toDisk) { |
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newChunk = repository.newChunk(now); |
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MetadataRepository.getInstance().setOutput(newChunk.getUnfishedFile().toString()); |
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} else { |
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MetadataRepository.getInstance().setOutput(null); |
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} |
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currentChunk = newChunk; |
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jvm.beginRecording_(); |
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recording.setState(RecordingState.RUNNING); |
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updateSettings(); |
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writeMetaEvents(); |
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} else { |
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RepositoryChunk newChunk = null; |
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if (toDisk) { |
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newChunk = repository.newChunk(now); |
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RequestEngine.doChunkEnd(); |
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MetadataRepository.getInstance().setOutput(newChunk.getUnfishedFile().toString()); |
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} |
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recording.setState(RecordingState.RUNNING); |
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updateSettings(); |
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writeMetaEvents(); |
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if (currentChunk != null) { |
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finishChunk(currentChunk, now, recording); |
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} |
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currentChunk = newChunk; |
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} |
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RequestEngine.doChunkBegin(); |
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} |
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50745 | 258 |
synchronized void stop(PlatformRecording recording) { |
50113 | 259 |
RecordingState state = recording.getState(); |
260 |
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261 |
if (Utils.isAfter(state, RecordingState.RUNNING)) { |
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throw new IllegalStateException("Can't stop an already stopped recording."); |
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} |
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if (Utils.isBefore(state, RecordingState.RUNNING)) { |
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throw new IllegalStateException("Recording must be started before it can be stopped."); |
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} |
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Instant now = Instant.now(); |
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boolean toDisk = false; |
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boolean endPhysical = true; |
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for (PlatformRecording s : getRecordings()) { |
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RecordingState rs = s.getState(); |
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if (s != recording && RecordingState.RUNNING == rs) { |
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endPhysical = false; |
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if (s.isToDisk()) { |
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toDisk = true; |
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} |
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} |
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} |
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50745 | 279 |
OldObjectSample.emit(recording); |
50113 | 280 |
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if (endPhysical) { |
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RequestEngine.doChunkEnd(); |
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if (recording.isToDisk()) { |
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if (currentChunk != null) { |
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MetadataRepository.getInstance().setOutput(null); |
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finishChunk(currentChunk, now, null); |
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currentChunk = null; |
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} |
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} else { |
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// last memory |
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50745 | 291 |
dumpMemoryToDestination(recording); |
50113 | 292 |
} |
293 |
jvm.endRecording_(); |
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disableEvents(); |
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} else { |
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296 |
RepositoryChunk newChunk = null; |
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297 |
RequestEngine.doChunkEnd(); |
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298 |
updateSettingsButIgnoreRecording(recording); |
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299 |
if (toDisk) { |
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300 |
newChunk = repository.newChunk(now); |
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MetadataRepository.getInstance().setOutput(newChunk.getUnfishedFile().toString()); |
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302 |
} else { |
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MetadataRepository.getInstance().setOutput(null); |
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} |
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305 |
writeMetaEvents(); |
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306 |
if (currentChunk != null) { |
|
307 |
finishChunk(currentChunk, now, null); |
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} |
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309 |
currentChunk = newChunk; |
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310 |
RequestEngine.doChunkBegin(); |
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311 |
} |
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312 |
recording.setState(RecordingState.STOPPED); |
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313 |
} |
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314 |
||
50745 | 315 |
private void dumpMemoryToDestination(PlatformRecording recording) { |
316 |
WriteableUserPath dest = recording.getDestination(); |
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50113 | 317 |
if (dest != null) { |
318 |
MetadataRepository.getInstance().setOutput(dest.getText()); |
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recording.clearDestination(); |
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320 |
} |
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321 |
} |
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private void disableEvents() { |
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323 |
MetadataRepository.getInstance().disableEvents(); |
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324 |
} |
|
325 |
||
326 |
void updateSettings() { |
|
327 |
updateSettingsButIgnoreRecording(null); |
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328 |
} |
|
329 |
||
330 |
void updateSettingsButIgnoreRecording(PlatformRecording ignoreMe) { |
|
331 |
List<PlatformRecording> recordings = getRunningRecordings(); |
|
332 |
List<Map<String, String>> list = new ArrayList<>(recordings.size()); |
|
333 |
for (PlatformRecording r : recordings) { |
|
334 |
if (r != ignoreMe) { |
|
335 |
list.add(r.getSettings()); |
|
336 |
} |
|
337 |
} |
|
338 |
MetadataRepository.getInstance().setSettings(list); |
|
339 |
} |
|
340 |
||
341 |
synchronized void rotateDisk() { |
|
342 |
Instant now = Instant.now(); |
|
343 |
RepositoryChunk newChunk = repository.newChunk(now); |
|
344 |
RequestEngine.doChunkEnd(); |
|
345 |
MetadataRepository.getInstance().setOutput(newChunk.getUnfishedFile().toString()); |
|
346 |
writeMetaEvents(); |
|
347 |
if (currentChunk != null) { |
|
348 |
finishChunk(currentChunk, now, null); |
|
349 |
} |
|
350 |
currentChunk = newChunk; |
|
351 |
RequestEngine.doChunkBegin(); |
|
352 |
} |
|
353 |
||
354 |
private List<PlatformRecording> getRunningRecordings() { |
|
355 |
List<PlatformRecording> runningRecordings = new ArrayList<>(); |
|
356 |
for (PlatformRecording recording : getRecordings()) { |
|
357 |
if (recording.getState() == RecordingState.RUNNING) { |
|
358 |
runningRecordings.add(recording); |
|
359 |
} |
|
360 |
} |
|
361 |
return runningRecordings; |
|
362 |
} |
|
363 |
||
364 |
private List<RepositoryChunk> makeChunkList(Instant startTime, Instant endTime) { |
|
365 |
Set<RepositoryChunk> chunkSet = new HashSet<>(); |
|
366 |
for (PlatformRecording r : getRecordings()) { |
|
367 |
chunkSet.addAll(r.getChunks()); |
|
368 |
} |
|
369 |
if (chunkSet.size() > 0) { |
|
370 |
List<RepositoryChunk> chunks = new ArrayList<>(chunkSet.size()); |
|
371 |
for (RepositoryChunk rc : chunkSet) { |
|
372 |
if (rc.inInterval(startTime, endTime)) { |
|
373 |
chunks.add(rc); |
|
374 |
} |
|
375 |
} |
|
376 |
// n*log(n), should be able to do n*log(k) with a priority queue, |
|
377 |
// where k = number of recordings, n = number of chunks |
|
378 |
Collections.sort(chunks, RepositoryChunk.END_TIME_COMPARATOR); |
|
379 |
return chunks; |
|
380 |
} |
|
381 |
||
382 |
return Collections.emptyList(); |
|
383 |
} |
|
384 |
||
385 |
private void startDiskMonitor() { |
|
386 |
Thread t = SecuritySupport.createThreadWitNoPermissions("JFR Periodic Tasks", () -> periodicTask()); |
|
387 |
SecuritySupport.setDaemonThread(t, true); |
|
388 |
t.start(); |
|
389 |
} |
|
390 |
||
391 |
private void finishChunk(RepositoryChunk chunk, Instant time, PlatformRecording ignoreMe) { |
|
392 |
chunk.finish(time); |
|
393 |
for (PlatformRecording r : getRecordings()) { |
|
394 |
if (r != ignoreMe && r.getState() == RecordingState.RUNNING) { |
|
395 |
r.appendChunk(chunk); |
|
396 |
} |
|
397 |
} |
|
398 |
} |
|
399 |
||
400 |
private void writeMetaEvents() { |
|
401 |
||
402 |
if (activeRecordingEvent.isEnabled()) { |
|
403 |
for (PlatformRecording r : getRecordings()) { |
|
404 |
if (r.getState() == RecordingState.RUNNING && r.shouldWriteMetadataEvent()) { |
|
405 |
ActiveRecordingEvent event = new ActiveRecordingEvent(); |
|
406 |
event.id = r.getId(); |
|
407 |
event.name = r.getName(); |
|
408 |
WriteableUserPath p = r.getDestination(); |
|
409 |
event.destination = p == null ? null : p.getText(); |
|
410 |
Duration d = r.getDuration(); |
|
411 |
event.recordingDuration = d == null ? Long.MAX_VALUE : d.toMillis(); |
|
412 |
Duration age = r.getMaxAge(); |
|
413 |
event.maxAge = age == null ? Long.MAX_VALUE : age.toMillis(); |
|
414 |
Long size = r.getMaxSize(); |
|
415 |
event.maxSize = size == null ? Long.MAX_VALUE : size; |
|
416 |
Instant start = r.getStartTime(); |
|
417 |
event.recordingStart = start == null ? Long.MAX_VALUE : start.toEpochMilli(); |
|
418 |
event.commit(); |
|
419 |
} |
|
420 |
} |
|
421 |
} |
|
422 |
if (activeSettingEvent.isEnabled()) { |
|
423 |
for (EventControl ec : MetadataRepository.getInstance().getEventControls()) { |
|
424 |
ec.writeActiveSettingEvent(); |
|
425 |
} |
|
426 |
} |
|
427 |
} |
|
428 |
||
429 |
private void periodicTask() { |
|
53014
339d2fbe8675
8215284: Reduce noise induced by periodic task getFileSize()
mgronlun
parents:
52334
diff
changeset
|
430 |
if (!jvm.hasNativeJFR()) { |
339d2fbe8675
8215284: Reduce noise induced by periodic task getFileSize()
mgronlun
parents:
52334
diff
changeset
|
431 |
return; |
339d2fbe8675
8215284: Reduce noise induced by periodic task getFileSize()
mgronlun
parents:
52334
diff
changeset
|
432 |
} |
50113 | 433 |
while (true) { |
434 |
synchronized (this) { |
|
53014
339d2fbe8675
8215284: Reduce noise induced by periodic task getFileSize()
mgronlun
parents:
52334
diff
changeset
|
435 |
if (jvm.shouldRotateDisk()) { |
339d2fbe8675
8215284: Reduce noise induced by periodic task getFileSize()
mgronlun
parents:
52334
diff
changeset
|
436 |
rotateDisk(); |
50113 | 437 |
} |
438 |
} |
|
439 |
long minDelta = RequestEngine.doPeriodic(); |
|
440 |
long wait = Math.min(minDelta, Options.getWaitInterval()); |
|
441 |
takeNap(wait); |
|
442 |
} |
|
443 |
} |
|
444 |
||
445 |
private void takeNap(long duration) { |
|
446 |
try { |
|
447 |
synchronized (JVM.FILE_DELTA_CHANGE) { |
|
448 |
JVM.FILE_DELTA_CHANGE.wait(duration < 10 ? 10 : duration); |
|
449 |
} |
|
450 |
} catch (InterruptedException e) { |
|
451 |
e.printStackTrace(); |
|
452 |
} |
|
453 |
} |
|
454 |
||
455 |
synchronized Recording newCopy(PlatformRecording r, boolean stop) { |
|
456 |
Recording newRec = new Recording(); |
|
457 |
PlatformRecording copy = PrivateAccess.getInstance().getPlatformRecording(newRec); |
|
458 |
copy.setSettings(r.getSettings()); |
|
459 |
copy.setMaxAge(r.getMaxAge()); |
|
460 |
copy.setMaxSize(r.getMaxSize()); |
|
461 |
copy.setDumpOnExit(r.getDumpOnExit()); |
|
462 |
copy.setName("Clone of " + r.getName()); |
|
463 |
copy.setToDisk(r.isToDisk()); |
|
464 |
copy.setInternalDuration(r.getDuration()); |
|
465 |
copy.setStartTime(r.getStartTime()); |
|
466 |
copy.setStopTime(r.getStopTime()); |
|
467 |
||
468 |
if (r.getState() == RecordingState.NEW) { |
|
469 |
return newRec; |
|
470 |
} |
|
471 |
if (r.getState() == RecordingState.DELAYED) { |
|
472 |
copy.scheduleStart(r.getStartTime()); |
|
473 |
return newRec; |
|
474 |
} |
|
475 |
copy.setState(r.getState()); |
|
476 |
// recording has started, copy chunks |
|
477 |
for (RepositoryChunk c : r.getChunks()) { |
|
478 |
copy.add(c); |
|
479 |
} |
|
480 |
if (r.getState() == RecordingState.RUNNING) { |
|
481 |
if (stop) { |
|
482 |
copy.stop("Stopped when cloning recording '" + r.getName() + "'"); |
|
483 |
} else { |
|
484 |
if (r.getStopTime() != null) { |
|
485 |
TimerTask stopTask = copy.createStopTask(); |
|
486 |
copy.setStopTask(copy.createStopTask()); |
|
487 |
getTimer().schedule(stopTask, r.getStopTime().toEpochMilli()); |
|
488 |
} |
|
489 |
} |
|
490 |
} |
|
491 |
return newRec; |
|
492 |
} |
|
493 |
||
50745 | 494 |
public synchronized void fillWithRecordedData(PlatformRecording target, Boolean pathToGcRoots) { |
50113 | 495 |
boolean running = false; |
496 |
boolean toDisk = false; |
|
50745 | 497 |
|
50113 | 498 |
for (PlatformRecording r : recordings) { |
499 |
if (r.getState() == RecordingState.RUNNING) { |
|
500 |
running = true; |
|
50745 | 501 |
if (r.isToDisk()) { |
502 |
toDisk = true; |
|
503 |
} |
|
50113 | 504 |
} |
505 |
} |
|
506 |
// If needed, flush data from memory |
|
507 |
if (running) { |
|
508 |
if (toDisk) { |
|
50745 | 509 |
OldObjectSample.emit(recordings, pathToGcRoots); |
50113 | 510 |
rotateDisk(); |
511 |
} else { |
|
50745 | 512 |
try (PlatformRecording snapshot = newTemporaryRecording()) { |
513 |
snapshot.setToDisk(true); |
|
514 |
snapshot.setShouldWriteActiveRecordingEvent(false); |
|
50113 | 515 |
snapshot.start(); |
50745 | 516 |
OldObjectSample.emit(recordings, pathToGcRoots); |
517 |
snapshot.stop("Snapshot dump"); |
|
518 |
fillWithDiskChunks(target); |
|
50113 | 519 |
} |
50745 | 520 |
return; |
50113 | 521 |
} |
522 |
} |
|
50745 | 523 |
fillWithDiskChunks(target); |
50113 | 524 |
} |
525 |
||
50745 | 526 |
private void fillWithDiskChunks(PlatformRecording target) { |
50113 | 527 |
for (RepositoryChunk c : makeChunkList(null, null)) { |
50745 | 528 |
target.add(c); |
50113 | 529 |
} |
50745 | 530 |
target.setState(RecordingState.STOPPED); |
50113 | 531 |
Instant startTime = null; |
532 |
Instant endTime = null; |
|
533 |
||
50745 | 534 |
for (RepositoryChunk c : target.getChunks()) { |
50113 | 535 |
if (startTime == null || c.getStartTime().isBefore(startTime)) { |
536 |
startTime = c.getStartTime(); |
|
537 |
} |
|
538 |
if (endTime == null || c.getEndTime().isAfter(endTime)) { |
|
539 |
endTime = c.getEndTime(); |
|
540 |
} |
|
541 |
} |
|
542 |
Instant now = Instant.now(); |
|
543 |
if (startTime == null) { |
|
544 |
startTime = now; |
|
545 |
} |
|
546 |
if (endTime == null) { |
|
547 |
endTime = now; |
|
548 |
} |
|
50745 | 549 |
target.setStartTime(startTime); |
550 |
target.setStopTime(endTime); |
|
551 |
target.setInternalDuration(Duration.between(startTime, endTime)); |
|
50113 | 552 |
} |
553 |
} |