author | egahlin |
Fri, 31 May 2019 20:44:28 +0200 | |
branch | JEP-349-branch |
changeset 57385 | 7d9d4f629f6e |
parent 57380 | 6a7e7743b82f |
child 57427 | 596f839ce88f |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
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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.consumer; |
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import java.io.IOException; |
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import java.util.Collection; |
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import java.util.List; |
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import java.util.StringJoiner; |
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import jdk.jfr.EventType; |
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import jdk.jfr.internal.LogLevel; |
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import jdk.jfr.internal.LogTag; |
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import jdk.jfr.internal.Logger; |
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import jdk.jfr.internal.LongMap; |
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import jdk.jfr.internal.MetadataDescriptor; |
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import jdk.jfr.internal.Type; |
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import jdk.jfr.internal.Utils; |
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import jdk.jfr.internal.consumer.ChunkHeader; |
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import jdk.jfr.internal.consumer.InternalEventFilter; |
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import jdk.jfr.internal.consumer.Parser; |
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import jdk.jfr.internal.consumer.RecordingInput; |
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/** |
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* Parses a chunk. |
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* |
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*/ |
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final class ChunkParser { |
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private static final long CONSTANT_POOL_TYPE_ID = 1; |
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private final RecordingInput input; |
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private final ChunkHeader chunkHeader; |
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private final MetadataDescriptor metadata; |
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private final TimeConverter timeConverter; |
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private final MetadataDescriptor previousMetadata; |
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private final long pollInterval; |
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private final LongMap<ConstantLookup> constantLookups; |
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private LongMap<Type> typeMap; |
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private LongMap<Parser> parsers; |
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private boolean chunkFinished; |
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private InternalEventFilter eventFilter = InternalEventFilter.ACCEPT_ALL; |
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private boolean reuse; |
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private boolean ordered; |
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private boolean resetEventCache; |
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public ChunkParser(RecordingInput input, boolean reuse) throws IOException { |
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this(new ChunkHeader(input), null, 500); |
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this.reuse = reuse; |
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} |
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||
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private ChunkParser(ChunkHeader header, ChunkParser previous, long pollInterval) throws IOException { |
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this.input = header.getInput(); |
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this.chunkHeader = header; |
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if (previous == null) { |
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this.pollInterval = 500; |
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this.constantLookups = new LongMap<>(); |
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this.previousMetadata = null; |
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} else { |
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this.constantLookups = previous.constantLookups; |
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this.previousMetadata = previous.metadata; |
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this.pollInterval = previous.pollInterval; |
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this.ordered = previous.ordered; |
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this.reuse = previous.reuse; |
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this.eventFilter = previous.eventFilter; |
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} |
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this.metadata = header.readMetadata(previousMetadata); |
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this.timeConverter = new TimeConverter(chunkHeader, metadata.getGMTOffset()); |
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if (metadata != previousMetadata) { |
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ParserFactory factory = new ParserFactory(metadata, constantLookups, timeConverter); |
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parsers = factory.getParsers(); |
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typeMap = factory.getTypeMap(); |
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updateEventParsers(); |
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} else { |
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parsers = previous.parsers; |
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typeMap = previous.typeMap; |
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} |
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constantLookups.forEach(c -> c.newPool()); |
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fillConstantPools(0); |
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constantLookups.forEach(c -> c.getLatestPool().setResolving()); |
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constantLookups.forEach(c -> c.getLatestPool().resolve()); |
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constantLookups.forEach(c -> c.getLatestPool().setResolved()); |
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input.position(chunkHeader.getEventStart()); |
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} |
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public void setParserFilter(InternalEventFilter filter) { |
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// Disable low level filter, since it doesn't work |
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// when a psrser is shared |
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// this.eventFilter = filter; |
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// updateParserFilters(); |
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} |
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public InternalEventFilter getEventFilter() { |
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return this.eventFilter; |
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} |
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/** |
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* Reads an event and returns null when segment or chunk ends. |
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*/ |
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public RecordedEvent readStreamingEvent(boolean awaitNewEvents) throws IOException { |
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long absoluteChunkEnd = chunkHeader.getEnd(); |
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while (true) { |
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RecordedEvent event = readEvent(); |
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if (event != null) { |
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return event; |
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} |
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if (!awaitNewEvents) { |
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return null; |
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} |
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long lastValid = absoluteChunkEnd; |
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long metadataPoistion = chunkHeader.getMetataPosition(); |
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long contantPosition = chunkHeader.getConstantPoolPosition(); |
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chunkFinished = awaitUpdatedHeader(absoluteChunkEnd); |
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if (chunkFinished) { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "At chunk end"); |
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return null; |
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} |
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absoluteChunkEnd = chunkHeader.getEnd(); |
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// Read metadata and constant pools for the next segment |
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if (chunkHeader.getMetataPosition() != metadataPoistion) { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Found new metadata in chunk. Rebuilding types and parsers"); |
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MetadataDescriptor metadata = chunkHeader.readMetadata(previousMetadata); |
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ParserFactory factory = new ParserFactory(metadata, constantLookups, timeConverter); |
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parsers = factory.getParsers(); |
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typeMap = factory.getTypeMap(); |
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parents:
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updateEventParsers(); |
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} |
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if (contantPosition != chunkHeader.getConstantPoolPosition()) { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Found new constant pool data. Filling up pools with new values"); |
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constantLookups.forEach(c -> c.getLatestPool().setAllResolved(false)); |
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fillConstantPools(contantPosition + chunkHeader.getAbsoluteChunkStart()); |
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constantLookups.forEach(c -> c.getLatestPool().setResolving()); |
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constantLookups.forEach(c -> c.getLatestPool().resolve()); |
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constantLookups.forEach(c -> c.getLatestPool().setResolved()); |
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} |
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input.position(lastValid); |
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} |
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} |
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/** |
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* Reads an event and returns null when the chunk ends |
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*/ |
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public RecordedEvent readEvent() throws IOException { |
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long absoluteChunkEnd = chunkHeader.getEnd(); |
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while (input.position() < absoluteChunkEnd) { |
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long pos = input.position(); |
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int size = input.readInt(); |
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if (size == 0) { |
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throw new IOException("Event can't have zero size"); |
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} |
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long typeId = input.readLong(); |
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// Skip metadata and constant pool events (id = 0, id = 1) |
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if (typeId > CONSTANT_POOL_TYPE_ID) { |
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Parser p = parsers.get(typeId); |
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if (p instanceof EventParser) { |
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EventParser ep = (EventParser) p; |
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RecordedEvent event = ep.parse(input); |
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if (event != null) { |
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input.position(pos + size); |
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return event; |
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} |
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} |
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} |
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input.position(pos + size); |
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} |
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return null; |
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} |
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private boolean awaitUpdatedHeader(long absoluteChunkEnd) throws IOException { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Waiting for more data (streaming). Read so far: " + chunkHeader.getChunkSize() + " bytes"); |
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while (true) { |
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chunkHeader.refresh(); |
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if (absoluteChunkEnd != chunkHeader.getEnd()) { |
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return false; |
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} |
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if (chunkHeader.isFinished()) { |
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return true; |
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} |
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Utils.takeNap(pollInterval); |
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} |
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} |
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private void fillConstantPools(long abortCP) throws IOException { |
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long thisCP = chunkHeader.getConstantPoolPosition() + chunkHeader.getAbsoluteChunkStart(); |
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long lastCP = -1; |
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long delta = -1; |
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boolean log = Logger.shouldLog(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE); |
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while (thisCP != abortCP && delta != 0) { |
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input.position(thisCP); |
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lastCP = thisCP; |
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int size = input.readInt(); // size |
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long typeId = input.readLong(); |
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if (typeId != CONSTANT_POOL_TYPE_ID) { |
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throw new IOException("Expected check point event (id = 1) at position " + lastCP + ", but found type id = " + typeId); |
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} |
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input.readLong(); // timestamp |
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input.readLong(); // duration |
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delta = input.readLong(); |
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thisCP += delta; |
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boolean flush = input.readBoolean(); |
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int poolCount = input.readInt(); |
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final long logLastCP = lastCP; |
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final long logDelta = delta; |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, () -> { |
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return "New constant pool: startPosition=" + logLastCP + ", size=" + size + ", deltaToNext=" + logDelta + ", flush=" + flush + ", poolCount=" + poolCount; |
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}); |
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for (int i = 0; i < poolCount; i++) { |
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long id = input.readLong(); // type id |
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ConstantLookup lookup = constantLookups.get(id); |
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Type type = typeMap.get(id); |
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if (lookup == null) { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Found constant pool(" + id + ") that is never used"); |
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if (type == null) { |
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throw new IOException( |
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"Error parsing constant pool type " + getName(id) + " at position " + input.position() + " at check point between [" + lastCP + ", " + lastCP + size + "]"); |
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} |
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ConstantMap pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName()); |
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constantLookups.put(type.getId(), new ConstantLookup(pool, type)); |
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} |
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Parser parser = parsers.get(id); |
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if (parser == null) { |
247 |
throw new IOException("Could not find constant pool type with id = " + id); |
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} |
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try { |
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int count = input.readInt(); |
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if (count == 0) { |
252 |
throw new InternalError("Pool " + type.getName() + " must contain at least one element "); |
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} |
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if (log) { |
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, "Constant Pool " + i + ": " + type.getName()); |
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} |
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for (int j = 0; j < count; j++) { |
258 |
long key = input.readLong(); |
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// Object resolved = lookup.getCurrent(key); |
260 |
// Disable cache Object resolved = lookup.getResolved(key); |
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// if (resolved == null) { |
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Object v = parser.parse(input); |
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logConstant(key, v, false); |
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lookup.getLatestPool().put(key, v); |
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// } else { |
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// parser.skip(input); |
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// logConstant(key, resolved, true); |
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// Disable cache lookup.getLatestPool().putResolved(key, resolved); |
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269 |
// } |
|
50113 | 270 |
} |
271 |
} catch (Exception e) { |
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57360 | 272 |
throw new IOException("Error parsing constant pool type " + getName(id) + " at position " + input.position() + " at check point between [" + lastCP + ", " + lastCP + size + "]", |
273 |
e); |
|
50113 | 274 |
} |
275 |
} |
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57360 | 276 |
if (input.position() != lastCP + size) { |
50113 | 277 |
throw new IOException("Size of check point event doesn't match content"); |
278 |
} |
|
279 |
} |
|
280 |
} |
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281 |
||
57360 | 282 |
private void logConstant(long key, Object v, boolean preresolved) { |
283 |
if (!Logger.shouldLog(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE)) { |
|
284 |
return; |
|
285 |
} |
|
286 |
String valueText; |
|
287 |
if (v.getClass().isArray()) { |
|
288 |
Object[] array = (Object[]) v; |
|
289 |
StringJoiner sj = new StringJoiner(", ", "{", "}"); |
|
290 |
for (int i = 0; i < array.length; i++) { |
|
291 |
sj.add(textify(array[i])); |
|
292 |
} |
|
293 |
valueText = sj.toString(); |
|
294 |
} else { |
|
295 |
valueText = textify(v); |
|
296 |
} |
|
297 |
String suffix = preresolved ? " (presolved)" :""; |
|
298 |
Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, "Constant: " + key + " = " + valueText + suffix); |
|
299 |
} |
|
300 |
||
301 |
private String textify(Object o) { |
|
302 |
if (o == null) { // should not happen |
|
303 |
return "null"; |
|
304 |
} |
|
305 |
if (o instanceof String) { |
|
306 |
return "\"" + String.valueOf(o) + "\""; |
|
307 |
} |
|
308 |
if (o instanceof RecordedObject) { |
|
309 |
return o.getClass().getName(); |
|
310 |
} |
|
311 |
if (o.getClass().isArray()) { |
|
312 |
Object[] array = (Object[]) o; |
|
313 |
if (array.length > 0) { |
|
314 |
return textify(array[0]) + "[]"; // can it be recursive? |
|
315 |
} |
|
316 |
} |
|
317 |
return String.valueOf(o); |
|
318 |
} |
|
319 |
||
50113 | 320 |
private String getName(long id) { |
321 |
Type type = typeMap.get(id); |
|
52850 | 322 |
return type == null ? ("unknown(" + id + ")") : type.getName(); |
50113 | 323 |
} |
324 |
||
325 |
public Collection<Type> getTypes() { |
|
326 |
return metadata.getTypes(); |
|
327 |
} |
|
328 |
||
329 |
public List<EventType> getEventTypes() { |
|
330 |
return metadata.getEventTypes(); |
|
331 |
} |
|
332 |
||
57360 | 333 |
public boolean isLastChunk() throws IOException { |
50113 | 334 |
return chunkHeader.isLastChunk(); |
335 |
} |
|
336 |
||
337 |
public ChunkParser nextChunkParser() throws IOException { |
|
57360 | 338 |
return new ChunkParser(chunkHeader.nextHeader(), this, pollInterval); |
339 |
} |
|
340 |
||
341 |
public boolean isChunkFinished() { |
|
342 |
return chunkFinished; |
|
50113 | 343 |
} |
57380
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
344 |
|
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
345 |
// Need to call updateEventParsers() for |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
346 |
// change to take effect |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
347 |
public void setReuse(boolean resue) { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
348 |
this.reuse = resue; |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
349 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
350 |
|
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
351 |
// Need to call updateEventParsers() for |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
352 |
// change to take effect |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
353 |
public void setOrdered(boolean ordered) { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
354 |
this.ordered = ordered; |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
355 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
356 |
|
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
357 |
// Need to call updateEventParsers() for |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
358 |
// change to take effect |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
359 |
public void resetEventCache() { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
360 |
this.resetEventCache = true; |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
361 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
362 |
|
6a7e7743b82f
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egahlin
parents:
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diff
changeset
|
363 |
public void updateEventParsers() { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
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parents:
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diff
changeset
|
364 |
parsers.forEach(p -> { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
365 |
if (p instanceof EventParser) { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
366 |
EventParser ep = (EventParser) p; |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
367 |
ep.setOrdered(ordered); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
368 |
ep.setReuse(reuse); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
369 |
if (resetEventCache) { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
370 |
ep.resetCache(); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
371 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
372 |
long threshold = eventFilter.getThreshold(ep.getEventType().getName()); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
373 |
if (threshold >= 0) { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
374 |
ep.setEnabled(true); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
375 |
ep.setThreshold(timeConverter.convertDurationNanos(threshold)); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
376 |
} else { |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
377 |
ep.setThreshold(-1L); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
378 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
379 |
} |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
380 |
}); |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
381 |
resetEventCache = false; |
6a7e7743b82f
setOrdered and setReuse implemented for file stream, incl. unit tests
egahlin
parents:
57377
diff
changeset
|
382 |
} |
50113 | 383 |
} |