Module openj9.dtfjview

Package com.ibm.jvm.dtfjview.heapdump.portable

Class PortableHeapDumpRecord

java.lang.Object

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

Direct Known Subclasses:

ClassRecord, LongPrimitiveArrayRecord, ObjectRecord, PrimitiveArrayRecord

public abstract class PortableHeapDumpRecord
extends Object

Base class for all PHD records. Contains logic common to relative-addressed entities with references

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PortableHeapDumpRecord(long address, long previousAddress, ReferenceIterator references)	Constructor

Method Summary

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 void	writeReferences(DataOutput out)

Methods declared in class java.lang.Object

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

Field Detail

ONE_BYTE_REF

public static final byte ONE_BYTE_REF

See Also:

Constant Field Values

TWO_BYTE_REF

public static final byte TWO_BYTE_REF

See Also:

Constant Field Values

FOUR_BYTE_REF

public static final byte FOUR_BYTE_REF

See Also:

Constant Field Values

EIGHT_BYTE_REF

public static final byte EIGHT_BYTE_REF

See Also:

Constant Field Values

ADDRESS_SHIFT_SIZE

public static final int ADDRESS_SHIFT_SIZE

See Also:

Constant Field Values

_baseAddress

protected final long _baseAddress

Address diff-addresses are based from

_references

protected final ReferenceIterator _references

_referenceFieldSize

protected final byte _referenceFieldSize

_gapPreceding

protected final long _gapPreceding

_gapSize

protected final byte _gapSize

_numberOfReferences

protected int _numberOfReferences

Constructor Detail

PortableHeapDumpRecord

protected PortableHeapDumpRecord(long address,
                                 long previousAddress,
                                 ReferenceIterator references)

Constructor

Parameters:

baseAddress - The address to base the relative reference addresses from

references - Iterator of regular (absolute) references

Method Detail

sizeofReference

protected static byte sizeofReference(long reference)

getDifferenceReferences

protected ReferenceIterator getDifferenceReferences(ReferenceIterator input,
                                                    long base)

getAddressDifference

protected static long getAddressDifference(long address,
                                           long base)

writeReferences

protected final void writeReferences(DataOutput out)
                              throws IOException

Throws:

IOException

writeReference

protected void writeReference(DataOutput dos,
                              byte size,
                              long reference)
                       throws IOException

Throws:

IOException

writeHeapDump

protected abstract void writeHeapDump(DataOutput out)
                               throws IOException

Throws:

IOException