Module openj9.dtfj

Package com.ibm.j9ddr.vm29.pointer

Class AbstractPointer

java.lang.Object

com.ibm.j9ddr.vm29.j9.DataType

com.ibm.j9ddr.vm29.pointer.AbstractPointer

Direct Known Subclasses:

CorruptPointer, Pointer, StructurePointer

public abstract class AbstractPointer
extends DataType

Field Summary

Fields

Modifier and Type	Field	Description
protected long	address

Fields declared in class com.ibm.j9ddr.vm29.j9.DataType

BITFIELD_FORMAT, pointerPackageName, process, SIZEOF_BOOL, structurePackageName

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractPointer(long address)

Method Summary

Modifier and Type	Method	Description
abstract AbstractPointer	add(long count)
abstract AbstractPointer	add(Scalar count)
abstract AbstractPointer	addOffset(long offset)
abstract AbstractPointer	addOffset(Scalar offset)
boolean	allBitsIn(long bitmask)
boolean	anyBitsIn(long bitmask)
abstract DataType	at(long index)
abstract DataType	at(Scalar index)
int	compare(AbstractPointer pointer)
boolean	eq(Object obj)
String	formatFullInteractive()
long	getAddress()
protected static IProcess	getAddressSpace()
protected char	getBaseCharAtOffset(long offset)
protected boolean	getBoolAtOffset(long offset)
protected byte	getByteAtOffset(long offset)
int	getBytesAtOffset(long offset, byte[] data)
protected double	getDoubleAtOffset(long offset)
protected float	getFloatAtOffset(long offset)
String	getHexAddress()
String	getHexValue()	This method reads number of the bytes depending on the pointers' base size.
protected IDATA	getIDATAAtOffset(long offset)
protected int	getIntAtOffset(long offset)
protected long	getLongAtOffset(long offset)
protected com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer	getObjectClassAtOffset(long offset)
protected com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer	getObjectMonitorAtOffset(long offset)
protected com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer	getObjectReferenceAtOffset(long offset)
protected long	getPointerAtOffset(long offset)
protected short	getShortAtOffset(long offset)
String	getTargetName()
protected UDATA	getUDATAAtOffset(long offset)
boolean	gt(AbstractPointer pointer)
boolean	gte(AbstractPointer pointer)
String	hexAt(long index)	This method returns the memory values at the given index.
String	hexAt(Scalar index)	This method returns the memory values at the given index.
boolean	isNull()
boolean	lt(AbstractPointer pointer)
boolean	lte(AbstractPointer pointer)
long	nonNullAddress()
boolean	notNull()
static void	reportClassCacheStats()
protected abstract long	sizeOfBaseType()
abstract AbstractPointer	sub(long count)
IDATA	sub(AbstractPointer pointer)
abstract AbstractPointer	sub(Scalar count)
abstract AbstractPointer	subOffset(long offset)
abstract AbstractPointer	subOffset(Scalar offset)
abstract AbstractPointer	untag()
abstract AbstractPointer	untag(long tagBits)

Methods declared in class com.ibm.j9ddr.vm29.j9.DataType

formatShortInteractive, getJ9RASPointer, getPointerPackageName, getProcess, getStructure, getStructure, getStructure, getStructurePackageName, init, longValue, setJ9RASPointer

Methods declared in class java.lang.Object

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

Field Detail

address

protected long address

Constructor Detail

AbstractPointer

protected AbstractPointer(long address)

Method Detail

add

public abstract AbstractPointer add(long count)

add

public abstract AbstractPointer add(Scalar count)

addOffset

public abstract AbstractPointer addOffset(long offset)

addOffset

public abstract AbstractPointer addOffset(Scalar offset)

sub

public abstract AbstractPointer sub(long count)

sub

public abstract AbstractPointer sub(Scalar count)

subOffset

public abstract AbstractPointer subOffset(long offset)

subOffset

public abstract AbstractPointer subOffset(Scalar offset)

untag

public abstract AbstractPointer untag(long tagBits)

untag

public abstract AbstractPointer untag()

allBitsIn

public final boolean allBitsIn(long bitmask)

anyBitsIn

public boolean anyBitsIn(long bitmask)

at

public abstract DataType at(long index)
                     throws CorruptDataException

Throws:

CorruptDataException

at

public abstract DataType at(Scalar index)
                     throws CorruptDataException

Throws:

CorruptDataException

isNull

public boolean isNull()

notNull

public boolean notNull()

eq

public boolean eq(Object obj)

getAddress

public long getAddress()

nonNullAddress

public final long nonNullAddress()
                          throws NullPointerDereference

Throws:

NullPointerDereference

getHexAddress

public String getHexAddress()

hexAt

public String hexAt(long index)
             throws CorruptDataException

This method returns the memory values at the given index. For StructurePointer instance objects, UDATA.sizeof amount of bytes are read. Otherwise, amount of bytes to be read depend on the object type. For instance, if it is I16Pointer, then 2 bytes are read. Note that this method returns bytes as they appear in the memory. It ignores endian-ization. For instance I16 value 0xABCD lays in the memory as CDAB on Little Endian platforms. And this method returns for this I16Pointer 0xCDAB and does not reverse the bytes.

Parameters:

index - Offset of the memory to be read.

Returns:

String representation of the value at the given index.

Throws:

CorruptDataException

hexAt

public String hexAt(Scalar index)
             throws CorruptDataException

This method returns the memory values at the given index. For StructurePointer instance objects, UDATA.sizeof amount of bytes are read. Otherwise, amount of bytes to be read depend on the object type. For instance, if it is I16Pointer, then 2 bytes are read. Note that this method returns bytes as they appear in the memory. It ignores endian-ization. For instance I16 value 0xABCD lays in the memory as CDAB on Little Endian platforms. And this method returns for this I16Pointer 0xCDAB and does not reverse the bytes.

Parameters:

index - Offset of the memory to be read.

Returns:

String representation of the value at the given index.

Throws:

CorruptDataException

getHexValue

public String getHexValue()
                   throws CorruptDataException

This method reads number of the bytes depending on the pointers' base size. And if the platform is little endian, it reverses the bytes read and returns it as hex string. If the platform is big endian, then it returns the read bytes as it is as an hex string.

Returns:

hex string of the value of this pointer points.

Throws:

CorruptDataException

getAddressSpace

protected static IProcess getAddressSpace()

lt

public boolean lt(AbstractPointer pointer)

lte

public boolean lte(AbstractPointer pointer)

gt

public boolean gt(AbstractPointer pointer)

gte

public boolean gte(AbstractPointer pointer)

sub

public IDATA sub(AbstractPointer pointer)

sizeOfBaseType

protected abstract long sizeOfBaseType()

compare

public int compare(AbstractPointer pointer)

getPointerAtOffset

protected long getPointerAtOffset(long offset)
                           throws CorruptDataException

Throws:

CorruptDataException

getIntAtOffset

protected int getIntAtOffset(long offset)
                      throws CorruptDataException

Throws:

CorruptDataException

getDoubleAtOffset

protected double getDoubleAtOffset(long offset)
                            throws CorruptDataException

Throws:

CorruptDataException

getFloatAtOffset

protected float getFloatAtOffset(long offset)
                          throws CorruptDataException

Throws:

CorruptDataException

getBoolAtOffset

protected boolean getBoolAtOffset(long offset)
                           throws CorruptDataException

Throws:

CorruptDataException

getUDATAAtOffset

protected UDATA getUDATAAtOffset(long offset)
                          throws CorruptDataException

Throws:

CorruptDataException

getIDATAAtOffset

protected IDATA getIDATAAtOffset(long offset)
                          throws CorruptDataException

Throws:

CorruptDataException

getShortAtOffset

protected short getShortAtOffset(long offset)
                          throws CorruptDataException

Throws:

CorruptDataException

getByteAtOffset

protected byte getByteAtOffset(long offset)
                        throws CorruptDataException

Throws:

CorruptDataException

getBytesAtOffset

public int getBytesAtOffset(long offset,
                            byte[] data)
                     throws CorruptDataException

Throws:

CorruptDataException

getBaseCharAtOffset

protected char getBaseCharAtOffset(long offset)
                            throws CorruptDataException

Throws:

CorruptDataException

getLongAtOffset

protected long getLongAtOffset(long offset)
                        throws CorruptDataException

Throws:

CorruptDataException

getObjectReferenceAtOffset

protected com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer getObjectReferenceAtOffset(long offset)
                                                                                   throws CorruptDataException

Throws:

CorruptDataException

getObjectClassAtOffset

protected com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer getObjectClassAtOffset(long offset)
                                                                              throws CorruptDataException

Throws:

CorruptDataException

getObjectMonitorAtOffset

protected com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer getObjectMonitorAtOffset(long offset)
                                                                                        throws CorruptDataException

Throws:

CorruptDataException

formatFullInteractive

public String formatFullInteractive()

Returns:

Full DDR-interactive formatting

getTargetName

public String getTargetName()

reportClassCacheStats

public static void reportClassCacheStats()