author | mgronlun |
Wed, 30 Oct 2019 19:43:52 +0100 | |
changeset 58863 | c16ac7a2eba4 |
parent 58836 | 31ec3e55fa3d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 2019, 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.DEBUG; |
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import static jdk.jfr.internal.LogTag.JFR_SYSTEM; |
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import java.io.ByteArrayOutputStream; |
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import java.io.DataOutputStream; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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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 jdk.jfr.AnnotationElement; |
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import jdk.jfr.Event; |
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import jdk.jfr.EventType; |
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import jdk.jfr.Period; |
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import jdk.jfr.StackTrace; |
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import jdk.jfr.Threshold; |
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import jdk.jfr.ValueDescriptor; |
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import jdk.jfr.internal.RequestEngine.RequestHook; |
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import jdk.jfr.internal.consumer.RepositoryFiles; |
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import jdk.jfr.internal.handlers.EventHandler; |
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public final class MetadataRepository { |
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private static final JVM jvm = JVM.getJVM(); |
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private static final MetadataRepository instace = new MetadataRepository(); |
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private final List<EventType> nativeEventTypes = new ArrayList<>(100); |
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private final List<EventControl> nativeControls = new ArrayList<EventControl>(100); |
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private final TypeLibrary typeLibrary = TypeLibrary.getInstance(); |
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private final SettingsManager settingsManager = new SettingsManager(); |
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private final Map<String, Class<? extends Event>> mirrors = new HashMap<>(); |
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private boolean staleMetadata = true; |
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private boolean unregistered; |
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private long lastUnloaded = -1; |
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public MetadataRepository() { |
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initializeJVMEventTypes(); |
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} |
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private void initializeJVMEventTypes() { |
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List<RequestHook> requestHooks = new ArrayList<>(); |
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for (Type type : typeLibrary.getTypes()) { |
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if (type instanceof PlatformEventType) { |
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PlatformEventType pEventType = (PlatformEventType) type; |
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EventType eventType = PrivateAccess.getInstance().newEventType(pEventType); |
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pEventType.setHasDuration(eventType.getAnnotation(Threshold.class) != null); |
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pEventType.setHasStackTrace(eventType.getAnnotation(StackTrace.class) != null); |
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pEventType.setHasCutoff(eventType.getAnnotation(Cutoff.class) != null); |
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pEventType.setHasPeriod(eventType.getAnnotation(Period.class) != null); |
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// Must add hook before EventControl is created as it removes |
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// annotations, such as Period and Threshold. |
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if (pEventType.hasPeriod()) { |
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pEventType.setEventHook(true); |
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if (!(Type.EVENT_NAME_PREFIX + "ExecutionSample").equals(type.getName())) { |
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requestHooks.add(new RequestHook(pEventType)); |
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} |
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} |
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nativeControls.add(new EventControl(pEventType)); |
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nativeEventTypes.add(eventType); |
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} |
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} |
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RequestEngine.addHooks(requestHooks); |
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} |
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public static MetadataRepository getInstance() { |
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return instace; |
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} |
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public synchronized List<EventType> getRegisteredEventTypes() { |
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List<EventHandler> handlers = getEventHandlers(); |
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List<EventType> eventTypes = new ArrayList<>(handlers.size() + nativeEventTypes.size()); |
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for (EventHandler h : handlers) { |
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if (h.isRegistered()) { |
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eventTypes.add(h.getEventType()); |
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} |
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} |
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eventTypes.addAll(nativeEventTypes); |
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return eventTypes; |
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} |
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public synchronized EventType getEventType(Class<? extends jdk.internal.event.Event> eventClass) { |
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EventHandler h = getHandler(eventClass); |
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if (h != null && h.isRegistered()) { |
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return h.getEventType(); |
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} |
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throw new IllegalStateException("Event class " + eventClass.getName() + " is not registered"); |
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} |
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public synchronized void unregister(Class<? extends Event> eventClass) { |
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Utils.checkRegisterPermission(); |
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EventHandler handler = getHandler(eventClass); |
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if (handler != null) { |
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handler.setRegistered(false); |
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} |
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// never registered, ignore call |
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} |
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public synchronized EventType register(Class<? extends jdk.internal.event.Event> eventClass) { |
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return register(eventClass, Collections.emptyList(), Collections.emptyList()); |
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} |
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public synchronized EventType register(Class<? extends jdk.internal.event.Event> eventClass, List<AnnotationElement> dynamicAnnotations, List<ValueDescriptor> dynamicFields) { |
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Utils.checkRegisterPermission(); |
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EventHandler handler = getHandler(eventClass); |
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if (handler == null) { |
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if (eventClass.getAnnotation(MirrorEvent.class) != null) { |
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// don't register mirrors |
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return null; |
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} |
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PlatformEventType pe = findMirrorType(eventClass); |
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handler = makeHandler(eventClass, pe, dynamicAnnotations, dynamicFields); |
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} |
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handler.setRegistered(true); |
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typeLibrary.addType(handler.getPlatformEventType()); |
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if (jvm.isRecording()) { |
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storeDescriptorInJVM(); // needed for emergency dump |
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settingsManager.setEventControl(handler.getEventControl()); |
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settingsManager.updateRetransform(Collections.singletonList((eventClass))); |
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} else { |
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setStaleMetadata(); |
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} |
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return handler.getEventType(); |
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} |
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private PlatformEventType findMirrorType(Class<? extends jdk.internal.event.Event> eventClass) throws InternalError { |
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String fullName = eventClass.getModule().getName() + ":" + eventClass.getName(); |
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Class<? extends Event> mirrorClass = mirrors.get(fullName); |
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if (mirrorClass == null) { |
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return null; // not a mirror |
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} |
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Utils.verifyMirror(mirrorClass, eventClass); |
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PlatformEventType et = (PlatformEventType) TypeLibrary.createType(mirrorClass); |
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typeLibrary.removeType(et.getId()); |
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long id = Type.getTypeId(eventClass); |
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et.setId(id); |
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return et; |
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} |
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private EventHandler getHandler(Class<? extends jdk.internal.event.Event> eventClass) { |
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Utils.ensureValidEventSubclass(eventClass); |
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SecuritySupport.makeVisibleToJFR(eventClass); |
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Utils.ensureInitialized(eventClass); |
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return Utils.getHandler(eventClass); |
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} |
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private EventHandler makeHandler(Class<? extends jdk.internal.event.Event> eventClass, PlatformEventType pEventType, List<AnnotationElement> dynamicAnnotations, List<ValueDescriptor> dynamicFields) throws InternalError { |
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SecuritySupport.addHandlerExport(eventClass); |
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if (pEventType == null) { |
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pEventType = (PlatformEventType) TypeLibrary.createType(eventClass, dynamicAnnotations, dynamicFields); |
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} |
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EventType eventType = PrivateAccess.getInstance().newEventType(pEventType); |
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EventControl ec = new EventControl(pEventType, eventClass); |
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Class<? extends EventHandler> handlerClass = null; |
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try { |
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String eventHandlerName = EventHandlerCreator.makeEventHandlerName(eventType.getId()); |
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handlerClass = Class.forName(eventHandlerName, false, Event.class.getClassLoader()).asSubclass(EventHandler.class); |
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// Created eagerly on class load, tag as instrumented |
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pEventType.setInstrumented(); |
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Logger.log(JFR_SYSTEM, DEBUG, "Found existing event handler for " + eventType.getName()); |
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} catch (ClassNotFoundException cne) { |
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EventHandlerCreator ehc = new EventHandlerCreator(eventType.getId(), ec.getSettingInfos(), eventType, eventClass); |
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handlerClass = ehc.makeEventHandlerClass(); |
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Logger.log(LogTag.JFR_SYSTEM, DEBUG, "Created event handler for " + eventType.getName()); |
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} |
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EventHandler handler = EventHandlerCreator.instantiateEventHandler(handlerClass, true, eventType, ec); |
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Utils.setHandler(eventClass, handler); |
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return handler; |
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} |
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public synchronized void setSettings(List<Map<String, String>> list) { |
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settingsManager.setSettings(list); |
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} |
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204 |
synchronized void disableEvents() { |
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for (EventControl c : getEventControls()) { |
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c.disable(); |
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} |
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} |
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public synchronized List<EventControl> getEventControls() { |
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List<Class<? extends jdk.internal.event.Event>> eventClasses = jvm.getAllEventClasses(); |
212 |
ArrayList<EventControl> controls = new ArrayList<>(eventClasses.size() + nativeControls.size()); |
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controls.addAll(nativeControls); |
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for (Class<? extends jdk.internal.event.Event> clazz : eventClasses) { |
215 |
EventHandler eh = Utils.getHandler(clazz); |
|
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if (eh != null) { |
|
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controls.add(eh.getEventControl()); |
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} |
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} |
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return controls; |
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} |
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private void storeDescriptorInJVM() throws InternalError { |
|
224 |
jvm.storeMetadataDescriptor(getBinaryRepresentation()); |
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staleMetadata = false; |
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} |
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private static List<EventHandler> getEventHandlers() { |
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List<Class<? extends jdk.internal.event.Event>> allEventClasses = jvm.getAllEventClasses(); |
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List<EventHandler> eventHandlers = new ArrayList<>(allEventClasses.size()); |
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for (Class<? extends jdk.internal.event.Event> clazz : allEventClasses) { |
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EventHandler eh = Utils.getHandler(clazz); |
233 |
if (eh != null) { |
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eventHandlers.add(eh); |
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} |
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} |
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return eventHandlers; |
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238 |
} |
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239 |
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240 |
private byte[] getBinaryRepresentation() { |
|
241 |
ByteArrayOutputStream baos = new ByteArrayOutputStream(40000); |
|
242 |
DataOutputStream daos = new DataOutputStream(baos); |
|
243 |
try { |
|
244 |
List<Type> types = typeLibrary.getTypes(); |
|
245 |
Collections.sort(types); |
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246 |
MetadataDescriptor.write(types, daos); |
|
247 |
daos.flush(); |
|
248 |
return baos.toByteArray(); |
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249 |
} catch (IOException e) { |
|
250 |
// should not happen |
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251 |
throw new InternalError(e); |
|
252 |
} |
|
253 |
} |
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254 |
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255 |
synchronized boolean isEnabled(String eventName) { |
|
256 |
return settingsManager.isEnabled(eventName); |
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257 |
} |
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258 |
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259 |
synchronized void setStaleMetadata() { |
|
260 |
staleMetadata = true; |
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261 |
} |
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// Lock around setOutput ensures that other threads don't |
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// emit events after setOutput and unregister the event class, before a call |
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// to storeDescriptorInJVM |
266 |
synchronized void setOutput(String filename) { |
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if (staleMetadata) { |
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storeDescriptorInJVM(); |
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} |
50113 | 270 |
jvm.setOutput(filename); |
58863 | 271 |
if (filename != null) { |
272 |
RepositoryFiles.notifyNewFile(); |
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273 |
} |
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50113 | 274 |
unregisterUnloaded(); |
275 |
if (unregistered) { |
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if (typeLibrary.clearUnregistered()) { |
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storeDescriptorInJVM(); |
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} |
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unregistered = false; |
280 |
} |
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281 |
} |
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282 |
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283 |
private void unregisterUnloaded() { |
|
284 |
long unloaded = jvm.getUnloadedEventClassCount(); |
|
285 |
if (this.lastUnloaded != unloaded) { |
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this.lastUnloaded = unloaded; |
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List<Class<? extends jdk.internal.event.Event>> eventClasses = jvm.getAllEventClasses(); |
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HashSet<Long> knownIds = new HashSet<>(eventClasses.size()); |
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for (Class<? extends jdk.internal.event.Event> ec: eventClasses) { |
50113 | 290 |
knownIds.add(Type.getTypeId(ec)); |
291 |
} |
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292 |
for (Type type : typeLibrary.getTypes()) { |
|
293 |
if (type instanceof PlatformEventType) { |
|
294 |
if (!knownIds.contains(type.getId())) { |
|
295 |
PlatformEventType pe = (PlatformEventType) type; |
|
296 |
if (!pe.isJVM()) { |
|
297 |
pe.setRegistered(false); |
|
298 |
} |
|
299 |
} |
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300 |
} |
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301 |
} |
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302 |
} |
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} |
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synchronized void setUnregistered() { |
50113 | 306 |
unregistered = true; |
307 |
} |
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public synchronized void registerMirror(Class<? extends Event> eventClass) { |
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MirrorEvent me = eventClass.getAnnotation(MirrorEvent.class); |
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if (me != null) { |
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String fullName = me.module() + ":" + me.className(); |
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mirrors.put(fullName, eventClass); |
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return; |
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} |
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throw new InternalError("Mirror class must have annotation " + MirrorEvent.class.getName()); |
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} |
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public synchronized void flush() { |
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if (staleMetadata) { |
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storeDescriptorInJVM(); |
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} |
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jvm.flush(); |
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} |
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} |