--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,184 @@
+/*
+ * 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.internal.consumer;
+
+import java.io.DataInput;
+import java.io.IOException;
+
+import jdk.jfr.internal.LogLevel;
+import jdk.jfr.internal.LogTag;
+import jdk.jfr.internal.Logger;
+import jdk.jfr.internal.MetadataDescriptor;
+
+public final class ChunkHeader {
+ private static final long METADATA_TYPE_ID = 0;
+ private static final byte[] FILE_MAGIC = { 'F', 'L', 'R', '\0' };
+
+ private final short major;
+ private final short minor;
+ private final long chunkSize;
+ private final long chunkStartTicks;
+ private final long ticksPerSecond;
+ private final long chunkStartNanos;
+ private final long metadataPosition;
+ // private final long absoluteInitialConstantPoolPosition;
+ private final long absoluteChunkEnd;
+ private final long absoluteEventStart;
+ private final long absoluteChunkStart;
+ private final boolean lastChunk;
+ private final RecordingInput input;
+ private final long durationNanos;
+ private final long id;
+ private long constantPoolPosition;
+
+ public ChunkHeader(RecordingInput input) throws IOException {
+ this(input, 0, 0);
+ }
+
+ private ChunkHeader(RecordingInput input, long absoluteChunkStart, long id) throws IOException {
+ input.position(absoluteChunkStart);
+ if (input.position() >= input.size()) {
+ throw new IOException("Chunk contains no data");
+ }
+ verifyMagic(input);
+ this.input = input;
+ this.id = id;
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk " + id);
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: startPosition=" + absoluteChunkStart);
+ major = input.readRawShort();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: major=" + major);
+ minor = input.readRawShort();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: minor=" + minor);
+ if (major != 1 && major != 2) {
+ throw new IOException("File version " + major + "." + minor + ". Only Flight Recorder files of version 1.x and 2.x can be read by this JDK.");
+ }
+ chunkSize = input.readRawLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: chunkSize=" + chunkSize);
+ this.constantPoolPosition = input.readRawLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: constantPoolPosition=" + constantPoolPosition);
+ metadataPosition = input.readRawLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: metadataPosition=" + metadataPosition);
+ chunkStartNanos = input.readRawLong(); // nanos since epoch
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: startNanos=" + chunkStartNanos);
+ durationNanos = input.readRawLong(); // duration nanos, not used
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: durationNanos=" + durationNanos);
+ chunkStartTicks = input.readRawLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: startTicks=" + chunkStartTicks);
+ ticksPerSecond = input.readRawLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Chunk: ticksPerSecond=" + ticksPerSecond);
+ input.readRawInt(); // features, not used
+
+ // set up boundaries
+ this.absoluteChunkStart = absoluteChunkStart;
+ absoluteChunkEnd = absoluteChunkStart + chunkSize;
+ lastChunk = input.size() == absoluteChunkEnd;
+ absoluteEventStart = input.position();
+
+ // read metadata
+ input.position(absoluteEventStart);
+ }
+
+ public ChunkHeader nextHeader() throws IOException {
+ return new ChunkHeader(input, absoluteChunkEnd, id + 1);
+ }
+
+ public MetadataDescriptor readMetadata() throws IOException {
+ input.position(absoluteChunkStart + metadataPosition);
+ input.readInt(); // size
+ long id = input.readLong(); // event type id
+ if (id != METADATA_TYPE_ID) {
+ throw new IOException("Expected metadata event. Type id=" + id + ", should have been " + METADATA_TYPE_ID);
+ }
+ input.readLong(); // start time
+ input.readLong(); // duration
+ long metadataId = input.readLong();
+ Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.TRACE, "Metadata id=" + metadataId);
+ // No need to read if metadataId == lastMetadataId, but we
+ // do it for verification purposes.
+ return MetadataDescriptor.read(input);
+ }
+
+ public boolean isLastChunk() {
+ return lastChunk;
+ }
+
+ public short getMajor() {
+ return major;
+ }
+
+ public short getMinor() {
+ return minor;
+ }
+
+ public long getAbsoluteChunkStart() {
+ return absoluteChunkStart;
+ }
+
+ public long getConstantPoolPosition() {
+ return constantPoolPosition;
+ }
+
+ public long getStartTicks() {
+ return chunkStartTicks;
+ }
+
+ public double getTicksPerSecond() {
+ return ticksPerSecond;
+ }
+
+ public long getStartNanos() {
+ return chunkStartNanos;
+ }
+
+ public long getEnd() {
+ return absoluteChunkEnd;
+ }
+
+ public long getSize() {
+ return chunkSize;
+ }
+
+ public long getDuration() {
+ return durationNanos;
+ }
+
+ public RecordingInput getInput() {
+ return input;
+ }
+
+ private static void verifyMagic(DataInput input) throws IOException {
+ for (byte c : FILE_MAGIC) {
+ if (input.readByte() != c) {
+ throw new IOException("Not a Flight Recorder file");
+ }
+ }
+ }
+
+ public long getEventStart() {
+ return absoluteEventStart;
+ }
+
+}