--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/consumer/ChunkParser.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,176 @@
+/*
+ * 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());
+ }
+}