/* * Copyright (c) 2003, 2004, 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 sun.management.counter.perf;import sun.management.counter.*;import java.nio.*;import java.io.UnsupportedEncodingException;class PerfDataEntry { private class EntryFieldOffset { private final static int SIZEOF_BYTE = 1; private final static int SIZEOF_INT = 4; private final static int SIZEOF_LONG = 8; private final static int ENTRY_LENGTH_SIZE = SIZEOF_INT; private final static int NAME_OFFSET_SIZE = SIZEOF_INT; private final static int VECTOR_LENGTH_SIZE = SIZEOF_INT; private final static int DATA_TYPE_SIZE = SIZEOF_BYTE; private final static int FLAGS_SIZE = SIZEOF_BYTE; private final static int DATA_UNIT_SIZE = SIZEOF_BYTE; private final static int DATA_VAR_SIZE = SIZEOF_BYTE; private final static int DATA_OFFSET_SIZE = SIZEOF_INT; final static int ENTRY_LENGTH = 0; final static int NAME_OFFSET = ENTRY_LENGTH + ENTRY_LENGTH_SIZE; final static int VECTOR_LENGTH = NAME_OFFSET + NAME_OFFSET_SIZE;; final static int DATA_TYPE = VECTOR_LENGTH + VECTOR_LENGTH_SIZE; final static int FLAGS = DATA_TYPE + DATA_TYPE_SIZE; final static int DATA_UNIT = FLAGS + FLAGS_SIZE; final static int DATA_VAR = DATA_UNIT + DATA_UNIT_SIZE; final static int DATA_OFFSET = DATA_VAR + DATA_VAR_SIZE; } private String name; private int entryStart; private int entryLength; private int vectorLength; private PerfDataType dataType; private int flags; private Units unit; private Variability variability; private int dataOffset; private int dataSize; private ByteBuffer data; PerfDataEntry(ByteBuffer b) { entryStart = b.position(); entryLength = b.getInt(); // check for valid entry length if (entryLength <= 0 || entryLength > b.limit()) { throw new InstrumentationException("Invalid entry length: " + " entryLength = " + entryLength); } // check if last entry occurs before the eof. if ((entryStart + entryLength) > b.limit()) { throw new InstrumentationException("Entry extends beyond end of buffer: " + " entryStart = " + entryStart + " entryLength = " + entryLength + " buffer limit = " + b.limit()); } b.position(entryStart + EntryFieldOffset.NAME_OFFSET); int nameOffset = b.getInt(); if ((entryStart + nameOffset) > b.limit()) { throw new InstrumentationException("Invalid name offset: " + " entryStart = " + entryStart + " nameOffset = " + nameOffset + " buffer limit = " + b.limit()); } b.position(entryStart + EntryFieldOffset.VECTOR_LENGTH); vectorLength = b.getInt(); b.position(entryStart + EntryFieldOffset.DATA_TYPE); dataType = PerfDataType.toPerfDataType(b.get()); b.position(entryStart + EntryFieldOffset.FLAGS); flags = b.get(); b.position(entryStart + EntryFieldOffset.DATA_UNIT); unit = Units.toUnits(b.get()); b.position(entryStart + EntryFieldOffset.DATA_VAR); variability = Variability.toVariability(b.get()); b.position(entryStart + EntryFieldOffset.DATA_OFFSET); dataOffset = b.getInt(); // read in the perfData item name, casting bytes to chars. skip the // null terminator b.position(entryStart + nameOffset); // calculate the length of the name int nameLength = 0; byte c; for (; (c = b.get()) != (byte)0; nameLength++); byte[] symbolBytes = new byte[nameLength]; b.position(entryStart + nameOffset); for (int i = 0; i < nameLength; i++) { symbolBytes[i] = b.get(); } // convert name into a String try { name = new String(symbolBytes, "UTF-8"); } catch (UnsupportedEncodingException e) { // should not reach here // "UTF-8" is always a known encoding throw new InternalError(e.getMessage()); } if (variability == Variability.INVALID) { throw new InstrumentationException("Invalid variability attribute:" + " name = " + name); } if (unit == Units.INVALID) { throw new InstrumentationException("Invalid units attribute: " + " name = " + name); } if (vectorLength > 0) { dataSize = vectorLength * dataType.size(); } else { dataSize = dataType.size(); } // check if data beyond the eof. if ((entryStart + dataOffset + dataSize) > b.limit()) { throw new InstrumentationException("Data extends beyond end of buffer: " + " entryStart = " + entryStart + " dataOffset = " + dataOffset+ " dataSize = " + dataSize + " buffer limit = " + b.limit()); } // Construct a ByteBuffer for the data b.position(entryStart + dataOffset); data = b.slice(); data.order(b.order()); data.limit(dataSize); } public int size() { return entryLength; } public String name() { return name; } public PerfDataType type() { return dataType; } public Units units() { return unit; } public int flags() { return flags; } /** * Returns the number of elements in the data. */ public int vectorLength() { return vectorLength; } public Variability variability() { return variability; } public ByteBuffer byteData() { data.position(0); assert data.remaining() == vectorLength(); return data.duplicate(); } public LongBuffer longData() { LongBuffer lb = data.asLongBuffer(); return lb; }}
/*
* Copyright (c) 2003, 2004, 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 sun.management.counter.perf;
import sun.management.counter.*;
import java.nio.*;
import java.io.UnsupportedEncodingException;
class PerfDataEntry {
private class EntryFieldOffset {
private final static int SIZEOF_BYTE = 1;
private final static int SIZEOF_INT = 4;
private final static int SIZEOF_LONG = 8;
private final static int ENTRY_LENGTH_SIZE = SIZEOF_INT;
private final static int NAME_OFFSET_SIZE = SIZEOF_INT;
private final static int VECTOR_LENGTH_SIZE = SIZEOF_INT;
private final static int DATA_TYPE_SIZE = SIZEOF_BYTE;
private final static int FLAGS_SIZE = SIZEOF_BYTE;
private final static int DATA_UNIT_SIZE = SIZEOF_BYTE;
private final static int DATA_VAR_SIZE = SIZEOF_BYTE;
private final static int DATA_OFFSET_SIZE = SIZEOF_INT;
final static int ENTRY_LENGTH = 0;
final static int NAME_OFFSET = ENTRY_LENGTH + ENTRY_LENGTH_SIZE;
final static int VECTOR_LENGTH = NAME_OFFSET + NAME_OFFSET_SIZE;;
final static int DATA_TYPE = VECTOR_LENGTH + VECTOR_LENGTH_SIZE;
final static int FLAGS = DATA_TYPE + DATA_TYPE_SIZE;
final static int DATA_UNIT = FLAGS + FLAGS_SIZE;
final static int DATA_VAR = DATA_UNIT + DATA_UNIT_SIZE;
final static int DATA_OFFSET = DATA_VAR + DATA_VAR_SIZE;
}
private String name;
private int entryStart;
private int entryLength;
private int vectorLength;
private PerfDataType dataType;
private int flags;
private Units unit;
private Variability variability;
private int dataOffset;
private int dataSize;
private ByteBuffer data;
PerfDataEntry(ByteBuffer b) {
entryStart = b.position();
entryLength = b.getInt();
// check for valid entry length
if (entryLength <= 0 || entryLength > b.limit()) {
throw new InstrumentationException("Invalid entry length: " +
" entryLength = " + entryLength);
}
// check if last entry occurs before the eof.
if ((entryStart + entryLength) > b.limit()) {
throw new InstrumentationException("Entry extends beyond end of buffer: " +
" entryStart = " + entryStart +
" entryLength = " + entryLength +
" buffer limit = " + b.limit());
}
b.position(entryStart + EntryFieldOffset.NAME_OFFSET);
int nameOffset = b.getInt();
if ((entryStart + nameOffset) > b.limit()) {
throw new InstrumentationException("Invalid name offset: " +
" entryStart = " + entryStart +
" nameOffset = " + nameOffset +
" buffer limit = " + b.limit());
}
b.position(entryStart + EntryFieldOffset.VECTOR_LENGTH);
vectorLength = b.getInt();
b.position(entryStart + EntryFieldOffset.DATA_TYPE);
dataType = PerfDataType.toPerfDataType(b.get());
b.position(entryStart + EntryFieldOffset.FLAGS);
flags = b.get();
b.position(entryStart + EntryFieldOffset.DATA_UNIT);
unit = Units.toUnits(b.get());
b.position(entryStart + EntryFieldOffset.DATA_VAR);
variability = Variability.toVariability(b.get());
b.position(entryStart + EntryFieldOffset.DATA_OFFSET);
dataOffset = b.getInt();
// read in the perfData item name, casting bytes to chars. skip the
// null terminator
b.position(entryStart + nameOffset);
// calculate the length of the name
int nameLength = 0;
byte c;
for (; (c = b.get()) != (byte)0; nameLength++);
byte[] symbolBytes = new byte[nameLength];
b.position(entryStart + nameOffset);
for (int i = 0; i < nameLength; i++) {
symbolBytes[i] = b.get();
}
// convert name into a String
try {
name = new String(symbolBytes, "UTF-8");
}
catch (UnsupportedEncodingException e) {
// should not reach here
// "UTF-8" is always a known encoding
throw new InternalError(e.getMessage());
}
if (variability == Variability.INVALID) {
throw new InstrumentationException("Invalid variability attribute:" +
" name = " + name);
}
if (unit == Units.INVALID) {
throw new InstrumentationException("Invalid units attribute: " +
" name = " + name);
}
if (vectorLength > 0) {
dataSize = vectorLength * dataType.size();
} else {
dataSize = dataType.size();
}
// check if data beyond the eof.
if ((entryStart + dataOffset + dataSize) > b.limit()) {
throw new InstrumentationException("Data extends beyond end of buffer: " +
" entryStart = " + entryStart +
" dataOffset = " + dataOffset+
" dataSize = " + dataSize +
" buffer limit = " + b.limit());
}
// Construct a ByteBuffer for the data
b.position(entryStart + dataOffset);
data = b.slice();
data.order(b.order());
data.limit(dataSize);
}
public int size() {
return entryLength;
}
public String name() {
return name;
}
public PerfDataType type() {
return dataType;
}
public Units units() {
return unit;
}
public int flags() {
return flags;
}
/**
* Returns the number of elements in the data.
*/
public int vectorLength() {
return vectorLength;
}
public Variability variability() {
return variability;
}
public ByteBuffer byteData() {
data.position(0);
assert data.remaining() == vectorLength();
return data.duplicate();
}
public LongBuffer longData() {
LongBuffer lb = data.asLongBuffer();
return lb;
}
}