Class ObjectRecord

java.lang.Object

com.ibm.jvm.dtfjview.heapdump.portable.PortableHeapDumpRecord

com.ibm.jvm.dtfjview.heapdump.portable.ObjectRecord

Direct Known Subclasses:

LongObjectRecord, MediumObjectRecord, ShortObjectRecord

public abstract class ObjectRecord
extends PortableHeapDumpRecord

Object record. Base class for anything that looks like an object (has a classAddress, a size and a hashcode in addition to the address, previousAddress and references required to be a PortableHeapDumpRecord).

Field Summary

Fields

Modifier and Type	Field	Description
protected final long	_classAddress
protected final int	_hashCode
protected final boolean	_is32BitHash

Fields declared in class PortableHeapDumpRecord

_baseAddress, _gapPreceding, _gapSize, _numberOfReferences, _referenceFieldSize, _references, ADDRESS_SHIFT_SIZE, EIGHT_BYTE_REF, FOUR_BYTE_REF, ONE_BYTE_REF, TWO_BYTE_REF

Modifier and Type	Field	Description
protected final long	_baseAddress	Address diff-addresses are based from
protected final long	_gapPreceding
protected final byte	_gapSize
protected int	_numberOfReferences
protected final byte	_referenceFieldSize
protected final ReferenceIterator	_references
static final int	ADDRESS_SHIFT_SIZE
static final byte	EIGHT_BYTE_REF
static final byte	FOUR_BYTE_REF
static final byte	ONE_BYTE_REF
static final byte	TWO_BYTE_REF

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ObjectRecord(long address, long previousAddress, long classAddress, int hashCode, ReferenceIterator references, boolean is32BitHash)

Method Summary

Modifier and Type	Method	Description
static ObjectRecord	getObjectRecord(long address, long previousAddress, long classAddress, int hashCode, ReferenceIterator references, PortableHeapDumpClassCache cache, boolean is64Bit, boolean is32BitHash)	Static factory method to pick the appropriate factory method
protected static boolean	isShortObjectEligible(long current, long previous)

Methods declared in class PortableHeapDumpRecord

getAddressDifference, getDifferenceReferences, sizeofReference, writeHeapDump, writeReference, writeReferences

Modifier and Type	Method	Description
protected static long	getAddressDifference(long address, long base)
protected ReferenceIterator	getDifferenceReferences(ReferenceIterator input, long base)
protected static byte	sizeofReference(long reference)
protected abstract void	writeHeapDump(DataOutput out)
protected void	writeReference(DataOutput dos, byte size, long reference)
protected final void	writeReferences(DataOutput out)

Methods declared in class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

_hashCode

protected final int _hashCode

_classAddress

protected final long _classAddress

_is32BitHash

protected final boolean _is32BitHash

Constructor Details

ObjectRecord

protected ObjectRecord(long address,
 long previousAddress,
 long classAddress,
 int hashCode,
 ReferenceIterator references,
 boolean is32BitHash)

Method Details

isShortObjectEligible

protected static boolean isShortObjectEligible(long current,
 long previous)

getObjectRecord

public static ObjectRecord getObjectRecord(long address,
 long previousAddress,
 long classAddress,
 int hashCode,
 ReferenceIterator references,
 PortableHeapDumpClassCache cache,
 boolean is64Bit,
 boolean is32BitHash)

Static factory method to pick the appropriate factory method

Returns:

ObjectRecord for this object