1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * The contents of this file are subject to the terms of either the Universal Permissive License 7 * v 1.0 as shown at http://oss.oracle.com/licenses/upl 8 * 9 * or the following license: 10 * 11 * Redistribution and use in source and binary forms, with or without modification, are permitted 12 * provided that the following conditions are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions 15 * and the following disclaimer. 16 * 17 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of 18 * conditions and the following disclaimer in the documentation and/or other materials provided with 19 * the distribution. 20 * 21 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to 22 * endorse or promote products derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 26 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 31 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 package org.openjdk.jmc.flightrecorder.internal.parser.v1; 34 35 import java.io.IOException; 36 import java.util.List; 37 38 import org.openjdk.jmc.flightrecorder.CouldNotLoadRecordingException; 39 import org.openjdk.jmc.flightrecorder.internal.ChunkInfo; 40 import org.openjdk.jmc.flightrecorder.internal.IChunkLoader; 41 import org.openjdk.jmc.flightrecorder.internal.InvalidJfrFileException; 42 import org.openjdk.jmc.flightrecorder.internal.parser.Chunk; 43 import org.openjdk.jmc.flightrecorder.internal.parser.LoaderContext; 44 import org.openjdk.jmc.flightrecorder.internal.parser.v1.ChunkMetadata.ClassElement; 45 import org.openjdk.jmc.flightrecorder.internal.util.ParserToolkit; 46 47 public class ChunkLoaderV1 implements IChunkLoader { 48 49 private final static long CONSTANT_POOL_EVENT_TYPE = 1; 50 51 private final ChunkStructure header; 52 private final byte[] data; 53 private final LoaderContext context; 54 55 public ChunkLoaderV1(ChunkStructure header, byte[] data, LoaderContext context) { 56 this.header = header; 57 this.data = data; 58 this.context = context; 59 } 60 61 @Override 62 public byte[] call() throws Exception { 63 SeekableInputStream input = SeekableInputStream.build(data, header.isIntegersCompressed()); 64 65 // Read metadata 66 input.seek(header.getMetadataOffset()); 67 List<ClassElement> classes = ChunkMetadata.readMetadata(input).metadata.classes; 68 TypeManager manager = new TypeManager(classes, context, header); 69 70 // Read constants 71 long constantPoolOffset = 0; 72 // An initial constantPoolOffset of 0 indicates no constant pools. 73 long delta = header.getConstantPoolOffset(); 74 while (delta != 0) { 75 constantPoolOffset += delta; 76 input.seek(constantPoolOffset); 77 delta = readConstantPoolEvent(input, manager); 78 } 79 manager.resolveConstants(); 80 81 // Read events 82 long index = header.getBodyStartOffset(); 83 while (index < header.getChunkSize()) { 84 input.seek(index); 85 int size = input.readInt(); 86 long type = input.readLong(); 87 if (type != CONSTANT_POOL_EVENT_TYPE && type != ChunkMetadata.METADATA_EVENT_TYPE) { 88 manager.readEvent(type, input); 89 } 90 index += size; 91 } 92 return data; 93 } 94 95 private static long readConstantPoolEvent(IDataInput input, TypeManager manager) 96 throws IOException, InvalidJfrFileException { 97 input.readInt(); // size 98 ParserToolkit.assertValue(input.readLong(), CONSTANT_POOL_EVENT_TYPE); // type; 99 input.readLong(); // start 100 input.readLong(); // duration 101 long delta = input.readLong(); 102 input.readBoolean(); // flush 103 int poolCount = input.readInt(); 104 for (int i = 0; i < poolCount; i++) { 105 long classId = input.readLong(); 106 int constantCount = input.readInt(); 107 manager.readConstants(classId, input, constantCount); 108 } 109 return delta; 110 } 111 112 public static IChunkLoader create(Chunk input, LoaderContext context) 113 throws IOException, CouldNotLoadRecordingException { 114 ChunkStructure header = new ChunkStructure(input); 115 byte[] data = input.fill(header.getChunkSize()); 116 return new ChunkLoaderV1(header, data, context); 117 } 118 119 public static ChunkInfo getInfo(Chunk input, long position) throws IOException, CouldNotLoadRecordingException { 120 ChunkStructure header = new ChunkStructure(input); 121 return new ChunkInfo(position, header.getChunkSize(), header.getChunkRange()); 122 } 123 124 @Override 125 public long getTimestamp() { 126 return header.getStartTimeNanos(); 127 } 128 }