Java example source code file (HprofReader.java)
The HprofReader.java Java example source code
/*
* Copyright (c) 1997, 2008, 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.
*/
/*
* The Original Code is HAT. The Initial Developer of the
* Original Code is Bill Foote, with contributions from others
* at JavaSoft/Sun.
*/
package com.sun.tools.hat.internal.parser;
import java.io.*;
import java.util.Date;
import java.util.Hashtable;
import com.sun.tools.hat.internal.model.ArrayTypeCodes;
import com.sun.tools.hat.internal.model.*;
/**
* Object that's used to read a hprof file.
*
* @author Bill Foote
*/
public class HprofReader extends Reader /* imports */ implements ArrayTypeCodes {
final static int MAGIC_NUMBER = 0x4a415641;
// That's "JAVA", the first part of "JAVA PROFILE ..."
private final static String[] VERSIONS = {
" PROFILE 1.0\0",
" PROFILE 1.0.1\0",
" PROFILE 1.0.2\0",
};
private final static int VERSION_JDK12BETA3 = 0;
private final static int VERSION_JDK12BETA4 = 1;
private final static int VERSION_JDK6 = 2;
// These version numbers are indices into VERSIONS. The instance data
// member version is set to one of these, and it drives decisions when
// reading the file.
//
// Version 1.0.1 added HPROF_GC_PRIM_ARRAY_DUMP, which requires no
// version-sensitive parsing.
//
// Version 1.0.1 changed the type of a constant pool entry from a signature
// to a typecode.
//
// Version 1.0.2 added HPROF_HEAP_DUMP_SEGMENT and HPROF_HEAP_DUMP_END
// to allow a large heap to be dumped as a sequence of heap dump segments.
//
// The HPROF agent in J2SE 1.2 through to 5.0 generate a version 1.0.1
// file. In Java SE 6.0 the version is either 1.0.1 or 1.0.2 depending on
// the size of the heap (normally it will be 1.0.1 but for multi-GB
// heaps the heap dump will not fit in a HPROF_HEAP_DUMP record so the
// dump is generated as version 1.0.2).
//
// Record types:
//
static final int HPROF_UTF8 = 0x01;
static final int HPROF_LOAD_CLASS = 0x02;
static final int HPROF_UNLOAD_CLASS = 0x03;
static final int HPROF_FRAME = 0x04;
static final int HPROF_TRACE = 0x05;
static final int HPROF_ALLOC_SITES = 0x06;
static final int HPROF_HEAP_SUMMARY = 0x07;
static final int HPROF_START_THREAD = 0x0a;
static final int HPROF_END_THREAD = 0x0b;
static final int HPROF_HEAP_DUMP = 0x0c;
static final int HPROF_CPU_SAMPLES = 0x0d;
static final int HPROF_CONTROL_SETTINGS = 0x0e;
static final int HPROF_LOCKSTATS_WAIT_TIME = 0x10;
static final int HPROF_LOCKSTATS_HOLD_TIME = 0x11;
static final int HPROF_GC_ROOT_UNKNOWN = 0xff;
static final int HPROF_GC_ROOT_JNI_GLOBAL = 0x01;
static final int HPROF_GC_ROOT_JNI_LOCAL = 0x02;
static final int HPROF_GC_ROOT_JAVA_FRAME = 0x03;
static final int HPROF_GC_ROOT_NATIVE_STACK = 0x04;
static final int HPROF_GC_ROOT_STICKY_CLASS = 0x05;
static final int HPROF_GC_ROOT_THREAD_BLOCK = 0x06;
static final int HPROF_GC_ROOT_MONITOR_USED = 0x07;
static final int HPROF_GC_ROOT_THREAD_OBJ = 0x08;
static final int HPROF_GC_CLASS_DUMP = 0x20;
static final int HPROF_GC_INSTANCE_DUMP = 0x21;
static final int HPROF_GC_OBJ_ARRAY_DUMP = 0x22;
static final int HPROF_GC_PRIM_ARRAY_DUMP = 0x23;
static final int HPROF_HEAP_DUMP_SEGMENT = 0x1c;
static final int HPROF_HEAP_DUMP_END = 0x2c;
private final static int T_CLASS = 2;
private int version; // The version of .hprof being read
private int debugLevel;
private long currPos; // Current position in the file
private int dumpsToSkip;
private boolean callStack; // If true, read the call stack of objects
private int identifierSize; // Size, in bytes, of identifiers.
private Hashtable<Long, String> names;
// Hashtable<Integer, ThreadObject>, used to map the thread sequence number
// (aka "serial number") to the thread object ID for
// HPROF_GC_ROOT_THREAD_OBJ. ThreadObject is a trivial inner class,
// at the end of this file.
private Hashtable<Integer, ThreadObject> threadObjects;
// Hashtable<Long, String>, maps class object ID to class name
// (with / converted to .)
private Hashtable<Long, String> classNameFromObjectID;
// Hashtable<Integer, Integer>, maps class serial # to class object ID
private Hashtable<Integer, String> classNameFromSerialNo;
// Hashtable<Long, StackFrame> maps stack frame ID to StackFrame.
// Null if we're not tracking them.
private Hashtable<Long, StackFrame> stackFrames;
// Hashtable<Integer, StackTrace> maps stack frame ID to StackTrace
// Null if we're not tracking them.
private Hashtable<Integer, StackTrace> stackTraces;
private Snapshot snapshot;
public HprofReader(String fileName, PositionDataInputStream in,
int dumpNumber, boolean callStack, int debugLevel)
throws IOException {
super(in);
RandomAccessFile file = new RandomAccessFile(fileName, "r");
this.snapshot = new Snapshot(MappedReadBuffer.create(file));
this.dumpsToSkip = dumpNumber - 1;
this.callStack = callStack;
this.debugLevel = debugLevel;
names = new Hashtable<Long, String>();
threadObjects = new Hashtable<Integer, ThreadObject>(43);
classNameFromObjectID = new Hashtable<Long, String>();
if (callStack) {
stackFrames = new Hashtable<Long, StackFrame>(43);
stackTraces = new Hashtable<Integer, StackTrace>(43);
classNameFromSerialNo = new Hashtable<Integer, String>();
}
}
public Snapshot read() throws IOException {
currPos = 4; // 4 because of the magic number
version = readVersionHeader();
identifierSize = in.readInt();
snapshot.setIdentifierSize(identifierSize);
if (version >= VERSION_JDK12BETA4) {
snapshot.setNewStyleArrayClass(true);
} else {
snapshot.setNewStyleArrayClass(false);
}
currPos += 4;
if (identifierSize != 4 && identifierSize != 8) {
throw new IOException("I'm sorry, but I can't deal with an identifier size of " + identifierSize + ". I can only deal with 4 or 8.");
}
System.out.println("Dump file created " + (new Date(in.readLong())));
currPos += 8;
for (;;) {
int type;
try {
type = in.readUnsignedByte();
} catch (EOFException ignored) {
break;
}
in.readInt(); // Timestamp of this record
// Length of record: readInt() will return negative value for record
// length >2GB. so store 32bit value in long to keep it unsigned.
long length = in.readInt() & 0xffffffffL;
if (debugLevel > 0) {
System.out.println("Read record type " + type
+ ", length " + length
+ " at position " + toHex(currPos));
}
if (length < 0) {
throw new IOException("Bad record length of " + length
+ " at byte " + toHex(currPos+5)
+ " of file.");
}
currPos += 9 + length;
switch (type) {
case HPROF_UTF8: {
long id = readID();
byte[] chars = new byte[(int)length - identifierSize];
in.readFully(chars);
names.put(new Long(id), new String(chars));
break;
}
case HPROF_LOAD_CLASS: {
int serialNo = in.readInt(); // Not used
long classID = readID();
int stackTraceSerialNo = in.readInt();
long classNameID = readID();
Long classIdI = new Long(classID);
String nm = getNameFromID(classNameID).replace('/', '.');
classNameFromObjectID.put(classIdI, nm);
if (classNameFromSerialNo != null) {
classNameFromSerialNo.put(new Integer(serialNo), nm);
}
break;
}
case HPROF_HEAP_DUMP: {
if (dumpsToSkip <= 0) {
try {
readHeapDump(length, currPos);
} catch (EOFException exp) {
handleEOF(exp, snapshot);
}
if (debugLevel > 0) {
System.out.println(" Finished processing instances in heap dump.");
}
return snapshot;
} else {
dumpsToSkip--;
skipBytes(length);
}
break;
}
case HPROF_HEAP_DUMP_END: {
if (version >= VERSION_JDK6) {
if (dumpsToSkip <= 0) {
skipBytes(length); // should be no-op
return snapshot;
} else {
// skip this dump (of the end record for a sequence of dump segments)
dumpsToSkip--;
}
} else {
// HPROF_HEAP_DUMP_END only recognized in >= 1.0.2
warn("Ignoring unrecognized record type " + type);
}
skipBytes(length); // should be no-op
break;
}
case HPROF_HEAP_DUMP_SEGMENT: {
if (version >= VERSION_JDK6) {
if (dumpsToSkip <= 0) {
try {
// read the dump segment
readHeapDump(length, currPos);
} catch (EOFException exp) {
handleEOF(exp, snapshot);
}
} else {
// all segments comprising the heap dump will be skipped
skipBytes(length);
}
} else {
// HPROF_HEAP_DUMP_SEGMENT only recognized in >= 1.0.2
warn("Ignoring unrecognized record type " + type);
skipBytes(length);
}
break;
}
case HPROF_FRAME: {
if (stackFrames == null) {
skipBytes(length);
} else {
long id = readID();
String methodName = getNameFromID(readID());
String methodSig = getNameFromID(readID());
String sourceFile = getNameFromID(readID());
int classSer = in.readInt();
String className = classNameFromSerialNo.get(new Integer(classSer));
int lineNumber = in.readInt();
if (lineNumber < StackFrame.LINE_NUMBER_NATIVE) {
warn("Weird stack frame line number: " + lineNumber);
lineNumber = StackFrame.LINE_NUMBER_UNKNOWN;
}
stackFrames.put(new Long(id),
new StackFrame(methodName, methodSig,
className, sourceFile,
lineNumber));
}
break;
}
case HPROF_TRACE: {
if (stackTraces == null) {
skipBytes(length);
} else {
int serialNo = in.readInt();
int threadSeq = in.readInt(); // Not used
StackFrame[] frames = new StackFrame[in.readInt()];
for (int i = 0; i < frames.length; i++) {
long fid = readID();
frames[i] = stackFrames.get(new Long(fid));
if (frames[i] == null) {
throw new IOException("Stack frame " + toHex(fid) + " not found");
}
}
stackTraces.put(new Integer(serialNo),
new StackTrace(frames));
}
break;
}
case HPROF_UNLOAD_CLASS:
case HPROF_ALLOC_SITES:
case HPROF_START_THREAD:
case HPROF_END_THREAD:
case HPROF_HEAP_SUMMARY:
case HPROF_CPU_SAMPLES:
case HPROF_CONTROL_SETTINGS:
case HPROF_LOCKSTATS_WAIT_TIME:
case HPROF_LOCKSTATS_HOLD_TIME:
{
// Ignore these record types
skipBytes(length);
break;
}
default: {
skipBytes(length);
warn("Ignoring unrecognized record type " + type);
}
}
}
return snapshot;
}
private void skipBytes(long length) throws IOException {
in.skipBytes((int)length);
}
private int readVersionHeader() throws IOException {
int candidatesLeft = VERSIONS.length;
boolean[] matched = new boolean[VERSIONS.length];
for (int i = 0; i < candidatesLeft; i++) {
matched[i] = true;
}
int pos = 0;
while (candidatesLeft > 0) {
char c = (char) in.readByte();
currPos++;
for (int i = 0; i < VERSIONS.length; i++) {
if (matched[i]) {
if (c != VERSIONS[i].charAt(pos)) { // Not matched
matched[i] = false;
--candidatesLeft;
} else if (pos == VERSIONS[i].length() - 1) { // Full match
return i;
}
}
}
++pos;
}
throw new IOException("Version string not recognized at byte " + (pos+3));
}
private void readHeapDump(long bytesLeft, long posAtEnd) throws IOException {
while (bytesLeft > 0) {
int type = in.readUnsignedByte();
if (debugLevel > 0) {
System.out.println(" Read heap sub-record type " + type
+ " at position "
+ toHex(posAtEnd - bytesLeft));
}
bytesLeft--;
switch(type) {
case HPROF_GC_ROOT_UNKNOWN: {
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.UNKNOWN, ""));
break;
}
case HPROF_GC_ROOT_THREAD_OBJ: {
long id = readID();
int threadSeq = in.readInt();
int stackSeq = in.readInt();
bytesLeft -= identifierSize + 8;
threadObjects.put(new Integer(threadSeq),
new ThreadObject(id, stackSeq));
break;
}
case HPROF_GC_ROOT_JNI_GLOBAL: {
long id = readID();
long globalRefId = readID(); // Ignored, for now
bytesLeft -= 2*identifierSize;
snapshot.addRoot(new Root(id, 0, Root.NATIVE_STATIC, ""));
break;
}
case HPROF_GC_ROOT_JNI_LOCAL: {
long id = readID();
int threadSeq = in.readInt();
int depth = in.readInt();
bytesLeft -= identifierSize + 8;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
if (st != null) {
st = st.traceForDepth(depth+1);
}
snapshot.addRoot(new Root(id, to.threadId,
Root.NATIVE_LOCAL, "", st));
break;
}
case HPROF_GC_ROOT_JAVA_FRAME: {
long id = readID();
int threadSeq = in.readInt();
int depth = in.readInt();
bytesLeft -= identifierSize + 8;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
if (st != null) {
st = st.traceForDepth(depth+1);
}
snapshot.addRoot(new Root(id, to.threadId,
Root.JAVA_LOCAL, "", st));
break;
}
case HPROF_GC_ROOT_NATIVE_STACK: {
long id = readID();
int threadSeq = in.readInt();
bytesLeft -= identifierSize + 4;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
snapshot.addRoot(new Root(id, to.threadId,
Root.NATIVE_STACK, "", st));
break;
}
case HPROF_GC_ROOT_STICKY_CLASS: {
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.SYSTEM_CLASS, ""));
break;
}
case HPROF_GC_ROOT_THREAD_BLOCK: {
long id = readID();
int threadSeq = in.readInt();
bytesLeft -= identifierSize + 4;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
snapshot.addRoot(new Root(id, to.threadId,
Root.THREAD_BLOCK, "", st));
break;
}
case HPROF_GC_ROOT_MONITOR_USED: {
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.BUSY_MONITOR, ""));
break;
}
case HPROF_GC_CLASS_DUMP: {
int bytesRead = readClass();
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_INSTANCE_DUMP: {
int bytesRead = readInstance();
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_OBJ_ARRAY_DUMP: {
int bytesRead = readArray(false);
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_PRIM_ARRAY_DUMP: {
int bytesRead = readArray(true);
bytesLeft -= bytesRead;
break;
}
default: {
throw new IOException("Unrecognized heap dump sub-record type: " + type);
}
}
}
if (bytesLeft != 0) {
warn("Error reading heap dump or heap dump segment: Byte count is " + bytesLeft + " instead of 0");
skipBytes(bytesLeft);
}
if (debugLevel > 0) {
System.out.println(" Finished heap sub-records.");
}
}
private long readID() throws IOException {
return (identifierSize == 4)?
(Snapshot.SMALL_ID_MASK & (long)in.readInt()) : in.readLong();
}
//
// Read a java value. If result is non-null, it's expected to be an
// array of one element. We use it to fake multiple return values.
// @returns the number of bytes read
//
private int readValue(JavaThing[] resultArr) throws IOException {
byte type = in.readByte();
return 1 + readValueForType(type, resultArr);
}
private int readValueForType(byte type, JavaThing[] resultArr)
throws IOException {
if (version >= VERSION_JDK12BETA4) {
type = signatureFromTypeId(type);
}
return readValueForTypeSignature(type, resultArr);
}
private int readValueForTypeSignature(byte type, JavaThing[] resultArr)
throws IOException {
switch (type) {
case '[':
case 'L': {
long id = readID();
if (resultArr != null) {
resultArr[0] = new JavaObjectRef(id);
}
return identifierSize;
}
case 'Z': {
int b = in.readByte();
if (b != 0 && b != 1) {
warn("Illegal boolean value read");
}
if (resultArr != null) {
resultArr[0] = new JavaBoolean(b != 0);
}
return 1;
}
case 'B': {
byte b = in.readByte();
if (resultArr != null) {
resultArr[0] = new JavaByte(b);
}
return 1;
}
case 'S': {
short s = in.readShort();
if (resultArr != null) {
resultArr[0] = new JavaShort(s);
}
return 2;
}
case 'C': {
char ch = in.readChar();
if (resultArr != null) {
resultArr[0] = new JavaChar(ch);
}
return 2;
}
case 'I': {
int val = in.readInt();
if (resultArr != null) {
resultArr[0] = new JavaInt(val);
}
return 4;
}
case 'J': {
long val = in.readLong();
if (resultArr != null) {
resultArr[0] = new JavaLong(val);
}
return 8;
}
case 'F': {
float val = in.readFloat();
if (resultArr != null) {
resultArr[0] = new JavaFloat(val);
}
return 4;
}
case 'D': {
double val = in.readDouble();
if (resultArr != null) {
resultArr[0] = new JavaDouble(val);
}
return 8;
}
default: {
throw new IOException("Bad value signature: " + type);
}
}
}
private ThreadObject getThreadObjectFromSequence(int threadSeq)
throws IOException {
ThreadObject to = threadObjects.get(new Integer(threadSeq));
if (to == null) {
throw new IOException("Thread " + threadSeq +
" not found for JNI local ref");
}
return to;
}
private String getNameFromID(long id) throws IOException {
return getNameFromID(new Long(id));
}
private String getNameFromID(Long id) throws IOException {
if (id.longValue() == 0L) {
return "";
}
String result = names.get(id);
if (result == null) {
warn("Name not found at " + toHex(id.longValue()));
return "unresolved name " + toHex(id.longValue());
}
return result;
}
private StackTrace getStackTraceFromSerial(int ser) throws IOException {
if (stackTraces == null) {
return null;
}
StackTrace result = stackTraces.get(new Integer(ser));
if (result == null) {
warn("Stack trace not found for serial # " + ser);
}
return result;
}
//
// Handle a HPROF_GC_CLASS_DUMP
// Return number of bytes read
//
private int readClass() throws IOException {
long id = readID();
StackTrace stackTrace = getStackTraceFromSerial(in.readInt());
long superId = readID();
long classLoaderId = readID();
long signersId = readID();
long protDomainId = readID();
long reserved1 = readID();
long reserved2 = readID();
int instanceSize = in.readInt();
int bytesRead = 7 * identifierSize + 8;
int numConstPoolEntries = in.readUnsignedShort();
bytesRead += 2;
for (int i = 0; i < numConstPoolEntries; i++) {
int index = in.readUnsignedShort(); // unused
bytesRead += 2;
bytesRead += readValue(null); // We ignore the values
}
int numStatics = in.readUnsignedShort();
bytesRead += 2;
JavaThing[] valueBin = new JavaThing[1];
JavaStatic[] statics = new JavaStatic[numStatics];
for (int i = 0; i < numStatics; i++) {
long nameId = readID();
bytesRead += identifierSize;
byte type = in.readByte();
bytesRead++;
bytesRead += readValueForType(type, valueBin);
String fieldName = getNameFromID(nameId);
if (version >= VERSION_JDK12BETA4) {
type = signatureFromTypeId(type);
}
String signature = "" + ((char) type);
JavaField f = new JavaField(fieldName, signature);
statics[i] = new JavaStatic(f, valueBin[0]);
}
int numFields = in.readUnsignedShort();
bytesRead += 2;
JavaField[] fields = new JavaField[numFields];
for (int i = 0; i < numFields; i++) {
long nameId = readID();
bytesRead += identifierSize;
byte type = in.readByte();
bytesRead++;
String fieldName = getNameFromID(nameId);
if (version >= VERSION_JDK12BETA4) {
type = signatureFromTypeId(type);
}
String signature = "" + ((char) type);
fields[i] = new JavaField(fieldName, signature);
}
String name = classNameFromObjectID.get(new Long(id));
if (name == null) {
warn("Class name not found for " + toHex(id));
name = "unknown-name@" + toHex(id);
}
JavaClass c = new JavaClass(id, name, superId, classLoaderId, signersId,
protDomainId, fields, statics,
instanceSize);
snapshot.addClass(id, c);
snapshot.setSiteTrace(c, stackTrace);
return bytesRead;
}
private String toHex(long addr) {
return com.sun.tools.hat.internal.util.Misc.toHex(addr);
}
//
// Handle a HPROF_GC_INSTANCE_DUMP
// Return number of bytes read
//
private int readInstance() throws IOException {
long start = in.position();
long id = readID();
StackTrace stackTrace = getStackTraceFromSerial(in.readInt());
long classID = readID();
int bytesFollowing = in.readInt();
int bytesRead = (2 * identifierSize) + 8 + bytesFollowing;
JavaObject jobj = new JavaObject(classID, start);
skipBytes(bytesFollowing);
snapshot.addHeapObject(id, jobj);
snapshot.setSiteTrace(jobj, stackTrace);
return bytesRead;
}
//
// Handle a HPROF_GC_OBJ_ARRAY_DUMP or HPROF_GC_PRIM_ARRAY_DUMP
// Return number of bytes read
//
private int readArray(boolean isPrimitive) throws IOException {
long start = in.position();
long id = readID();
StackTrace stackTrace = getStackTraceFromSerial(in.readInt());
int num = in.readInt();
int bytesRead = identifierSize + 8;
long elementClassID;
if (isPrimitive) {
elementClassID = in.readByte();
bytesRead++;
} else {
elementClassID = readID();
bytesRead += identifierSize;
}
// Check for primitive arrays:
byte primitiveSignature = 0x00;
int elSize = 0;
if (isPrimitive || version < VERSION_JDK12BETA4) {
switch ((int)elementClassID) {
case T_BOOLEAN: {
primitiveSignature = (byte) 'Z';
elSize = 1;
break;
}
case T_CHAR: {
primitiveSignature = (byte) 'C';
elSize = 2;
break;
}
case T_FLOAT: {
primitiveSignature = (byte) 'F';
elSize = 4;
break;
}
case T_DOUBLE: {
primitiveSignature = (byte) 'D';
elSize = 8;
break;
}
case T_BYTE: {
primitiveSignature = (byte) 'B';
elSize = 1;
break;
}
case T_SHORT: {
primitiveSignature = (byte) 'S';
elSize = 2;
break;
}
case T_INT: {
primitiveSignature = (byte) 'I';
elSize = 4;
break;
}
case T_LONG: {
primitiveSignature = (byte) 'J';
elSize = 8;
break;
}
}
if (version >= VERSION_JDK12BETA4 && primitiveSignature == 0x00) {
throw new IOException("Unrecognized typecode: "
+ elementClassID);
}
}
if (primitiveSignature != 0x00) {
int size = elSize * num;
bytesRead += size;
JavaValueArray va = new JavaValueArray(primitiveSignature, start);
skipBytes(size);
snapshot.addHeapObject(id, va);
snapshot.setSiteTrace(va, stackTrace);
} else {
int sz = num * identifierSize;
bytesRead += sz;
JavaObjectArray arr = new JavaObjectArray(elementClassID, start);
skipBytes(sz);
snapshot.addHeapObject(id, arr);
snapshot.setSiteTrace(arr, stackTrace);
}
return bytesRead;
}
private byte signatureFromTypeId(byte typeId) throws IOException {
switch (typeId) {
case T_CLASS: {
return (byte) 'L';
}
case T_BOOLEAN: {
return (byte) 'Z';
}
case T_CHAR: {
return (byte) 'C';
}
case T_FLOAT: {
return (byte) 'F';
}
case T_DOUBLE: {
return (byte) 'D';
}
case T_BYTE: {
return (byte) 'B';
}
case T_SHORT: {
return (byte) 'S';
}
case T_INT: {
return (byte) 'I';
}
case T_LONG: {
return (byte) 'J';
}
default: {
throw new IOException("Invalid type id of " + typeId);
}
}
}
private void handleEOF(EOFException exp, Snapshot snapshot) {
if (debugLevel > 0) {
exp.printStackTrace();
}
warn("Unexpected EOF. Will miss information...");
// we have EOF, we have to tolerate missing references
snapshot.setUnresolvedObjectsOK(true);
}
private void warn(String msg) {
System.out.println("WARNING: " + msg);
}
//
// A trivial data-holder class for HPROF_GC_ROOT_THREAD_OBJ.
//
private class ThreadObject {
long threadId;
int stackSeq;
ThreadObject(long threadId, int stackSeq) {
this.threadId = threadId;
this.stackSeq = stackSeq;
}
}
}
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