| /* |
| * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.jfr.consumer; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import jdk.jfr.EventType; |
| import jdk.jfr.internal.LogLevel; |
| import jdk.jfr.internal.LogTag; |
| import jdk.jfr.internal.Logger; |
| import jdk.jfr.internal.MetadataDescriptor; |
| import jdk.jfr.internal.Type; |
| import jdk.jfr.internal.consumer.ChunkHeader; |
| import jdk.jfr.internal.consumer.RecordingInput; |
| |
| /** |
| * Parses a chunk. |
| * |
| */ |
| final class ChunkParser { |
| private static final long CONSTANT_POOL_TYPE_ID = 1; |
| private final RecordingInput input; |
| private final LongMap<Parser> parsers; |
| private final ChunkHeader chunkHeader; |
| private final long absoluteChunkEnd; |
| private final MetadataDescriptor metadata; |
| private final LongMap<Type> typeMap; |
| private final TimeConverter timeConverter; |
| |
| public ChunkParser(RecordingInput input) throws IOException { |
| this(new ChunkHeader(input)); |
| } |
| |
| private ChunkParser(ChunkHeader header) throws IOException { |
| this.input = header.getInput(); |
| this.chunkHeader = header; |
| this.metadata = header.readMetadata(); |
| this.absoluteChunkEnd = header.getEnd(); |
| this.timeConverter = new TimeConverter(chunkHeader); |
| |
| ParserFactory factory = new ParserFactory(metadata, timeConverter); |
| LongMap<ConstantMap> constantPools = factory.getConstantPools(); |
| parsers = factory.getParsers(); |
| typeMap = factory.getTypeMap(); |
| |
| fillConstantPools(parsers, constantPools); |
| constantPools.forEach(ConstantMap::setIsResolving); |
| constantPools.forEach(ConstantMap::resolve); |
| constantPools.forEach(ConstantMap::setResolved); |
| |
| input.position(chunkHeader.getEventStart()); |
| } |
| |
| public RecordedEvent readEvent() throws IOException { |
| while (input.position() < absoluteChunkEnd) { |
| long pos = input.position(); |
| int size = input.readInt(); |
| if (size == 0) { |
| throw new IOException("Event can't have zero size"); |
| } |
| long typeId = input.readLong(); |
| if (typeId > CONSTANT_POOL_TYPE_ID) { // also skips metadata (id=0) |
| Parser ep = parsers.get(typeId); |
| if (ep instanceof EventParser) { |
| return (RecordedEvent) ep.parse(input); |
| } |
| } |
| input.position(pos + size); |
| } |
| return null; |
| } |
| |
| private void fillConstantPools(LongMap<Parser> typeParser, LongMap<ConstantMap> constantPools) throws IOException { |
| long nextCP = chunkHeader.getAbsoluteChunkStart(); |
| long deltaToNext = chunkHeader.getConstantPoolPosition(); |
| while (deltaToNext != 0) { |
| nextCP += deltaToNext; |
| input.position(nextCP); |
| final long position = nextCP; |
| int size = input.readInt(); // size |
| long typeId = input.readLong(); |
| if (typeId != CONSTANT_POOL_TYPE_ID) { |
| throw new IOException("Expected check point event (id = 1) at position " + nextCP + ", but found type id = " + typeId); |
| } |
| input.readLong(); // timestamp |
| input.readLong(); // duration |
| deltaToNext = input.readLong(); |
| final long delta = deltaToNext; |
| boolean flush = input.readBoolean(); |
| int poolCount = input.readInt(); |
| Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, () -> { |
| return "New constant pool: startPosition=" + position + |
| ", size=" + size + ", deltaToNext=" + delta + |
| ", flush=" + flush + ", poolCount=" + poolCount; |
| }); |
| |
| for (int i = 0; i < poolCount; i++) { |
| long id = input.readLong(); // type id |
| ConstantMap pool = constantPools.get(id); |
| Type type = typeMap.get(id); |
| if (pool == null) { |
| Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Found constant pool(" + id + ") that is never used"); |
| if (type == null) { |
| throw new IOException("Error parsing constant pool type " + getName(id) + " at position " + input.position() + " at check point between [" + nextCP + ", " + nextCP + size + "]"); |
| } |
| pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName()); |
| constantPools.put(type.getId(), pool); |
| } |
| Parser parser = typeParser.get(id); |
| if (parser == null) { |
| throw new IOException("Could not find constant pool type with id = " + id); |
| } |
| try { |
| int count = input.readInt(); |
| Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, () -> "Constant: " + getName(id) + "[" + count + "]"); |
| for (int j = 0; j < count; j++) { |
| long key = input.readLong(); |
| Object value = parser.parse(input); |
| pool.put(key, value); |
| } |
| } catch (Exception e) { |
| throw new IOException("Error parsing constant pool type " + getName(id) + " at position " + input.position() + " at check point between [" + nextCP + ", " + nextCP + size + "]", e); |
| } |
| } |
| if (input.position() != nextCP + size) { |
| throw new IOException("Size of check point event doesn't match content"); |
| } |
| } |
| } |
| |
| private String getName(long id) { |
| Type type = typeMap.get(id); |
| return type == null ? ("unknown(" + id +")") : type.getName(); |
| } |
| |
| public Collection<Type> getTypes() { |
| return metadata.getTypes(); |
| } |
| |
| public List<EventType> getEventTypes() { |
| return metadata.getEventTypes(); |
| } |
| |
| public boolean isLastChunk() { |
| return chunkHeader.isLastChunk(); |
| } |
| |
| public ChunkParser nextChunkParser() throws IOException { |
| return new ChunkParser(chunkHeader.nextHeader()); |
| } |
| } |