author | egahlin |
Tue, 13 Aug 2019 03:58:29 +0200 | |
branch | JEP-349-branch |
changeset 57717 | 4ce66d271065 |
parent 57690 | 9316d02dd4a5 |
child 58197 | 0ef79bd7fb5c |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
57360 | 2 |
* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. |
50113 | 3 |
* 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.internal.consumer; |
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import java.io.DataInput; |
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import java.io.EOFException; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.RandomAccessFile; |
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import java.nio.file.Path; |
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public final class RecordingInput implements DataInput, AutoCloseable { |
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||
57466 | 37 |
private final static int DEFAULT_BLOCK_SIZE = 64_000; |
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private static final class Block { |
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private byte[] bytes = new byte[0]; |
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private long blockPosition; |
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Reduced allocation pressure. Fix getValue for startTime and duration
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private long blockPositionEnd; |
6fabe73e5d9a
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diff
changeset
|
43 |
|
50113 | 44 |
boolean contains(long position) { |
57452
6fabe73e5d9a
Reduced allocation pressure. Fix getValue for startTime and duration
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parents:
57425
diff
changeset
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45 |
return position >= blockPosition && position < blockPositionEnd; |
50113 | 46 |
} |
47 |
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48 |
public void read(RandomAccessFile file, int amount) throws IOException { |
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blockPosition = file.getFilePointer(); |
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// reuse byte array, if possible |
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57360 | 51 |
if (amount > bytes.length) { |
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bytes = new byte[amount]; |
53 |
} |
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57452
6fabe73e5d9a
Reduced allocation pressure. Fix getValue for startTime and duration
egahlin
parents:
57425
diff
changeset
|
54 |
this.blockPositionEnd = blockPosition + amount; |
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file.readFully(bytes, 0, amount); |
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} |
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58 |
public byte get(long position) { |
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return bytes[(int) (position - blockPosition)]; |
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} |
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57386 | 61 |
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public void reset() { |
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57454 | 63 |
blockPosition = 0; |
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blockPositionEnd = 0; |
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57386 | 65 |
} |
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} |
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private final int blockSize; |
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private final FileAccess fileAccess; |
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private RandomAccessFile file; |
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private String filename; |
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private Block currentBlock = new Block(); |
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private Block previousBlock = new Block(); |
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private long position; |
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private long size = -1; // Fail fast if setSize(...) has not been called |
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// before parsing |
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50113 | 76 |
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parents:
57466
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changeset
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public RecordingInput(File f, FileAccess fileAccess, int blockSize) throws IOException { |
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this.blockSize = blockSize; |
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this.fileAccess = fileAccess; |
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initialize(f); |
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} |
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private void initialize(File f) throws IOException { |
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this.filename = fileAccess.getAbsolutePath(f); |
57690
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parents:
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changeset
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this.file = fileAccess.openRAF(f, "r"); |
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this.position = 0; |
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this.size = -1; |
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this.currentBlock.reset(); |
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57717
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parents:
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changeset
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previousBlock.reset(); |
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if (fileAccess.length(f) < 8) { |
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throw new IOException("Not a valid Flight Recorder file. File length is only " + f.length() + " bytes."); |
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} |
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} |
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||
57690
9316d02dd4a5
Add EventStream::setEndTime(...) and a first stab at priviliged access to local repository
egahlin
parents:
57466
diff
changeset
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public RecordingInput(File f, FileAccess fileAccess) throws IOException { |
9316d02dd4a5
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parents:
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changeset
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this(f, fileAccess, DEFAULT_BLOCK_SIZE); |
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} |
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public void positionPhysical(long position) throws IOException { |
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file.seek(position); |
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} |
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public final byte readPhysicalByte() throws IOException { |
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return file.readByte(); |
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} |
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public long readPhysicalLong() throws IOException { |
108 |
return file.readLong(); |
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} |
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@Override |
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public final byte readByte() throws IOException { |
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if (!currentBlock.contains(position)) { |
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position(position); |
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} |
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return currentBlock.get(position++); |
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} |
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@Override |
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public final void readFully(byte[] dest, int offset, int length) throws IOException { |
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// TODO: Optimize, use Arrays.copy if all bytes are in current block |
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// array |
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for (int i = 0; i < length; i++) { |
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dest[i + offset] = readByte(); |
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} |
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} |
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@Override |
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public final void readFully(byte[] dst) throws IOException { |
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readFully(dst, 0, dst.length); |
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} |
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public final short readRawShort() throws IOException { |
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// copied from java.io.Bits |
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byte b0 = readByte(); |
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byte b1 = readByte(); |
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return (short) ((b1 & 0xFF) + (b0 << 8)); |
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} |
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@Override |
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public final double readDouble() throws IOException { |
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// copied from java.io.Bits |
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return Double.longBitsToDouble(readRawLong()); |
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} |
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@Override |
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public final float readFloat() throws IOException { |
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// copied from java.io.Bits |
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return Float.intBitsToFloat(readRawInt()); |
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} |
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152 |
public final int readRawInt() throws IOException { |
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// copied from java.io.Bits |
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byte b0 = readByte(); |
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byte b1 = readByte(); |
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byte b2 = readByte(); |
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byte b3 = readByte(); |
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return ((b3 & 0xFF)) + ((b2 & 0xFF) << 8) + ((b1 & 0xFF) << 16) + ((b0) << 24); |
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} |
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public final long readRawLong() throws IOException { |
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// copied from java.io.Bits |
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byte b0 = readByte(); |
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byte b1 = readByte(); |
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byte b2 = readByte(); |
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byte b3 = readByte(); |
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byte b4 = readByte(); |
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byte b5 = readByte(); |
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byte b6 = readByte(); |
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byte b7 = readByte(); |
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return ((b7 & 0xFFL)) + ((b6 & 0xFFL) << 8) + ((b5 & 0xFFL) << 16) + ((b4 & 0xFFL) << 24) + ((b3 & 0xFFL) << 32) + ((b2 & 0xFFL) << 40) + ((b1 & 0xFFL) << 48) + (((long) b0) << 56); |
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} |
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173 |
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57360 | 174 |
public final long position() { |
50113 | 175 |
return position; |
176 |
} |
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177 |
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178 |
public final void position(long newPosition) throws IOException { |
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179 |
if (!currentBlock.contains(newPosition)) { |
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180 |
if (!previousBlock.contains(newPosition)) { |
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57360 | 181 |
if (newPosition > size) { |
182 |
throw new EOFException("Trying to read at " + newPosition + ", but file is only " + size + " bytes."); |
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50113 | 183 |
} |
184 |
long blockStart = trimToFileSize(calculateBlockStart(newPosition)); |
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file.seek(blockStart); |
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// trim amount to file size |
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57360 | 187 |
long amount = Math.min(size - blockStart, blockSize); |
50113 | 188 |
previousBlock.read(file, (int) amount); |
189 |
} |
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// swap previous and current |
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Block tmp = currentBlock; |
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currentBlock = previousBlock; |
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previousBlock = tmp; |
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} |
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position = newPosition; |
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} |
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198 |
private final long trimToFileSize(long position) throws IOException { |
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return Math.min(size(), Math.max(0, position)); |
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} |
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202 |
private final long calculateBlockStart(long newPosition) { |
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// align to end of current block |
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if (currentBlock.contains(newPosition - blockSize)) { |
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return currentBlock.blockPosition + currentBlock.bytes.length; |
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} |
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// align before current block |
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if (currentBlock.contains(newPosition + blockSize)) { |
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return currentBlock.blockPosition - blockSize; |
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} |
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// not near current block, pick middle |
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return newPosition - blockSize / 2; |
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} |
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57360 | 215 |
public final long size() { |
50113 | 216 |
return size; |
217 |
} |
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219 |
public final void close() throws IOException { |
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file.close(); |
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} |
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@Override |
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public final int skipBytes(int n) throws IOException { |
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long position = position(); |
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position(position + n); |
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return (int) (position() - position); |
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} |
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@Override |
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public final boolean readBoolean() throws IOException { |
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return readByte() != 0; |
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} |
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@Override |
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public int readUnsignedByte() throws IOException { |
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return readByte() & 0x00FF; |
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} |
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240 |
@Override |
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public int readUnsignedShort() throws IOException { |
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return readShort() & 0xFFFF; |
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} |
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@Override |
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public final String readLine() throws IOException { |
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throw new UnsupportedOperationException(); |
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} |
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250 |
// NOTE, this method should really be called readString |
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// but can't be renamed without making RecordingInput a |
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// public class. |
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// |
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// This method DOES Not read as expected (s2 + utf8 encoded character) |
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// instead it read: |
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// byte encoding |
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// int size |
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// data (byte or char) |
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// |
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// where encoding |
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// |
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// 0, means null |
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// 1, means UTF8 encoded byte array |
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// 2, means char array |
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// 3, means latin-1 (ISO-8859-1) encoded byte array |
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// 4, means "" |
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@Override |
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public String readUTF() throws IOException { |
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57360 | 269 |
throw new UnsupportedOperationException("Use StringParser"); |
50113 | 270 |
} |
271 |
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272 |
@Override |
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273 |
public char readChar() throws IOException { |
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return (char) readLong(); |
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275 |
} |
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276 |
||
277 |
@Override |
|
278 |
public short readShort() throws IOException { |
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279 |
return (short) readLong(); |
|
280 |
} |
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281 |
||
282 |
@Override |
|
283 |
public int readInt() throws IOException { |
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284 |
return (int) readLong(); |
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285 |
} |
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286 |
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57454 | 287 |
public long readLongExpanded() throws IOException { |
288 |
final byte[] bytes = currentBlock.bytes; |
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289 |
final int index = (int) (position - currentBlock.blockPosition); |
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290 |
||
291 |
if (index + 8 < bytes.length && index >= 0) { |
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292 |
byte b0 = bytes[index]; |
|
293 |
if (b0 >= 0) { |
|
294 |
position += 1; |
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295 |
return (b0 & 0x7FL); |
|
296 |
} |
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297 |
int b1 = bytes[index + 1]; |
|
298 |
if (b1 >= 0) { |
|
299 |
position += 2; |
|
300 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7); |
|
301 |
} |
|
302 |
int b2 = bytes[index + 2]; |
|
303 |
if (b2 >= 0) { |
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304 |
position += 3; |
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305 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14); |
|
306 |
} |
|
307 |
int b3 = bytes[index + 3]; |
|
308 |
if (b3 >= 0) { |
|
309 |
position += 4; |
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310 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + ((b3 & 0x7FL) << 21); |
|
311 |
} |
|
312 |
int b4 = bytes[index + 4]; |
|
313 |
if (b4 >= 0) { |
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314 |
position += 5; |
|
315 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + |
|
316 |
((b3 & 0x7FL) << 21) + ((b4 & 0x7FL) << 28); |
|
317 |
} |
|
318 |
int b5 = bytes[index + 5]; |
|
319 |
if (b5 >= 0) { |
|
320 |
position += 6; |
|
321 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + |
|
322 |
((b3 & 0x7FL) << 21) + ((b4 & 0x7FL) << 28) + ((b5 & 0x7FL) << 35); |
|
323 |
} |
|
324 |
int b6 = bytes[index + 6]; |
|
325 |
if (b6 >= 0) { |
|
326 |
position += 7; |
|
327 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + |
|
328 |
((b3 & 0x7FL) << 21) + ((b4 & 0x7FL) << 28) + ((b5 & 0x7FL) << 35) + |
|
329 |
((b6 & 0x7FL) << 42); |
|
330 |
||
331 |
} |
|
332 |
int b7 = bytes[index + 7]; |
|
333 |
if (b7 >= 0) { |
|
334 |
position += 8; |
|
335 |
return (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + |
|
336 |
((b3 & 0x7FL) << 21) + ((b4 & 0x7FL) << 28) + ((b5 & 0x7FL) << 35) + |
|
337 |
((b6 & 0x7FL) << 42) + ((b7 & 0x7FL) << 49); |
|
338 |
} |
|
339 |
int b8 = bytes[index + 8];// read last byte raw |
|
340 |
position += 9; |
|
341 |
long ret = (b0 & 0x7FL) + ((b1 & 0x7FL) << 7) + ((b2 & 0x7FL) << 14) + |
|
342 |
((b3 & 0x7FL) << 21) + ((b4 & 0x7FL) << 28) + ((b5 & 0x7FL) << 35) + |
|
343 |
((b6 & 0x7FL) << 42) + ((b7 & 0x7FL) << 49); |
|
344 |
return ret + ((((long) (b8 & 0XFF)) << 56)); |
|
345 |
} else { |
|
346 |
return readLongSlow(); |
|
347 |
} |
|
348 |
} |
|
349 |
||
50113 | 350 |
public long readLong() throws IOException { |
57454 | 351 |
final byte[] bytes = currentBlock.bytes; |
352 |
final int index = (int) (position - currentBlock.blockPosition); |
|
353 |
||
354 |
if (index + 8 < bytes.length && index >= 0) { |
|
355 |
byte b0 = bytes[index]; |
|
356 |
long ret = (b0 & 0x7FL); |
|
357 |
if (b0 >= 0) { |
|
358 |
position += 1; |
|
359 |
return ret; |
|
360 |
} |
|
361 |
int b1 = bytes[index + 1]; |
|
362 |
ret += (b1 & 0x7FL) << 7; |
|
363 |
if (b1 >= 0) { |
|
364 |
position += 2; |
|
365 |
return ret; |
|
366 |
} |
|
367 |
int b2 = bytes[index + 2]; |
|
368 |
ret += (b2 & 0x7FL) << 14; |
|
369 |
if (b2 >= 0) { |
|
370 |
position += 3; |
|
371 |
return ret; |
|
372 |
} |
|
373 |
int b3 = bytes[index + 3]; |
|
374 |
ret += (b3 & 0x7FL) << 21; |
|
375 |
if (b3 >= 0) { |
|
376 |
position += 4; |
|
377 |
return ret; |
|
378 |
} |
|
379 |
int b4 = bytes[index + 4]; |
|
380 |
ret += (b4 & 0x7FL) << 28; |
|
381 |
if (b4 >= 0) { |
|
382 |
position += 5; |
|
383 |
return ret; |
|
384 |
} |
|
385 |
int b5 = bytes[index + 5]; |
|
386 |
ret += (b5 & 0x7FL) << 35; |
|
387 |
if (b5 >= 0) { |
|
388 |
position += 6; |
|
389 |
return ret; |
|
390 |
} |
|
391 |
int b6 = bytes[index + 6]; |
|
392 |
ret += (b6 & 0x7FL) << 42; |
|
393 |
if (b6 >= 0) { |
|
394 |
position += 7; |
|
395 |
return ret; |
|
396 |
} |
|
397 |
int b7 = bytes[index + 7]; |
|
398 |
ret += (b7 & 0x7FL) << 49; |
|
399 |
if (b7 >= 0) { |
|
400 |
position += 8; |
|
401 |
return ret; |
|
402 |
} |
|
403 |
int b8 = bytes[index + 8];// read last byte raw |
|
404 |
position += 9; |
|
405 |
return ret + (((long) (b8 & 0XFF)) << 56); |
|
406 |
} else { |
|
407 |
return readLongSlow(); |
|
408 |
} |
|
409 |
} |
|
410 |
||
411 |
private long readLongSlow() throws IOException { |
|
50113 | 412 |
byte b0 = readByte(); |
413 |
long ret = (b0 & 0x7FL); |
|
414 |
if (b0 >= 0) { |
|
415 |
return ret; |
|
416 |
} |
|
57454 | 417 |
|
50113 | 418 |
int b1 = readByte(); |
419 |
ret += (b1 & 0x7FL) << 7; |
|
420 |
if (b1 >= 0) { |
|
421 |
return ret; |
|
422 |
} |
|
57454 | 423 |
|
50113 | 424 |
int b2 = readByte(); |
425 |
ret += (b2 & 0x7FL) << 14; |
|
426 |
if (b2 >= 0) { |
|
427 |
return ret; |
|
428 |
} |
|
57454 | 429 |
|
50113 | 430 |
int b3 = readByte(); |
431 |
ret += (b3 & 0x7FL) << 21; |
|
432 |
if (b3 >= 0) { |
|
433 |
return ret; |
|
434 |
} |
|
57454 | 435 |
|
50113 | 436 |
int b4 = readByte(); |
437 |
ret += (b4 & 0x7FL) << 28; |
|
438 |
if (b4 >= 0) { |
|
439 |
return ret; |
|
440 |
} |
|
57454 | 441 |
|
50113 | 442 |
int b5 = readByte(); |
443 |
ret += (b5 & 0x7FL) << 35; |
|
444 |
if (b5 >= 0) { |
|
445 |
return ret; |
|
446 |
} |
|
57454 | 447 |
|
50113 | 448 |
int b6 = readByte(); |
449 |
ret += (b6 & 0x7FL) << 42; |
|
450 |
if (b6 >= 0) { |
|
451 |
return ret; |
|
452 |
} |
|
57454 | 453 |
|
50113 | 454 |
int b7 = readByte(); |
455 |
ret += (b7 & 0x7FL) << 49; |
|
456 |
if (b7 >= 0) { |
|
457 |
return ret; |
|
57454 | 458 |
|
50113 | 459 |
} |
57454 | 460 |
|
50113 | 461 |
int b8 = readByte(); // read last byte raw |
462 |
return ret + (((long) (b8 & 0XFF)) << 56); |
|
463 |
} |
|
57360 | 464 |
|
465 |
public void setValidSize(long size) { |
|
466 |
if (size > this.size) { |
|
467 |
this.size = size; |
|
468 |
} |
|
469 |
} |
|
470 |
||
471 |
public long getFileSize() throws IOException { |
|
472 |
return file.length(); |
|
473 |
} |
|
474 |
||
475 |
public String getFilename() { |
|
476 |
return filename; |
|
477 |
} |
|
478 |
||
57386 | 479 |
// Purpose of this method is to reuse block cache from a |
480 |
// previous RecordingInput |
|
57454 | 481 |
public void setFile(Path path) throws IOException { |
57386 | 482 |
try { |
57425 | 483 |
file.close(); |
57386 | 484 |
} catch (IOException e) { |
485 |
// perhaps deleted |
|
486 |
} |
|
57425 | 487 |
file = null; |
488 |
initialize(path.toFile()); |
|
57386 | 489 |
} |
57454 | 490 |
/* |
57386 | 491 |
|
57454 | 492 |
|
493 |
||
494 |
||
495 |
||
496 |
* |
|
497 |
* |
|
498 |
*/ |
|
50113 | 499 |
} |