Class GCHeapRegionDescriptorSegregated_V1

java.lang.Object

com.ibm.j9ddr.vm29.j9.gc.GCHeapRegionDescriptor

com.ibm.j9ddr.vm29.j9.gc.GCHeapRegionDescriptorSegregated_V1

public class GCHeapRegionDescriptorSegregated_V1
extends GCHeapRegionDescriptor

Field Summary

Fields

Modifier and Type	Field	Description
protected UDATA	cellSize
protected GCHeapRegionDescriptor	headOfSpan
protected VoidPointer	highAddress
protected VoidPointer	lowAddress
protected com.ibm.j9ddr.vm29.pointer.generated.MM_MemoryPoolPointer	memoryPool
protected com.ibm.j9ddr.vm29.pointer.generated.MM_MemorySubSpacePointer	memorySubSpace
protected UDATA	regionsInSpan
protected long	regionType
protected UDATA	sizeClass
protected UDATA	typeFlags

Fields declared in class com.ibm.j9ddr.vm29.j9.gc.GCHeapRegionDescriptor

heapRegionDescriptor

Constructor Summary

Constructors

Constructor	Description
GCHeapRegionDescriptorSegregated_V1(com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionDescriptorSegregatedPointer region)

Method Summary

Modifier and Type	Method	Description
boolean	containsObjects()
String	descriptionString()
UDATA	getCellSize()
GCHeapRegionDescriptor	getHeadOfSpan()
VoidPointer	getHighAddress()	Get the high address of this region
VoidPointer	getLowAddress()	Get the low address of this region
com.ibm.j9ddr.vm29.pointer.generated.MM_MemoryPoolPointer	getMemoryPool()
long	getRegionType()
UDATA	getSize()
UDATA	getSizeClass()
com.ibm.j9ddr.vm29.pointer.generated.MM_MemorySubSpacePointer	getSubSpace()
UDATA	getTypeFlags()	A helper to request the type flags from the Subspace associated with the receiving region.
protected VoidPointer	getWalkableHighAddress()
boolean	hasValidMarkMap()
protected void	init()
boolean	isAddressInRegion(AbstractPointer address)	Determine if the specified address is in the region
boolean	isImmortal()
boolean	isScoped()
GCObjectHeapIterator	objectIterator(boolean includeLiveObjects, boolean includeDeadObjects)	Create an iterator which iterates over all objects (if any) in the region

Methods declared in class com.ibm.j9ddr.vm29.j9.gc.GCHeapRegionDescriptor

fromHeapRegionDescriptor, fromHeapRegionDescriptor, getHeapRegionDescriptorPointer

Methods declared in class java.lang.Object

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

Field Details

sizeClass

protected UDATA sizeClass

cellSize

protected UDATA cellSize

lowAddress

protected VoidPointer lowAddress

highAddress

protected VoidPointer highAddress

regionsInSpan

protected UDATA regionsInSpan

regionType

protected long regionType

typeFlags

protected UDATA typeFlags

memorySubSpace

protected com.ibm.j9ddr.vm29.pointer.generated.MM_MemorySubSpacePointer memorySubSpace

memoryPool

protected com.ibm.j9ddr.vm29.pointer.generated.MM_MemoryPoolPointer memoryPool

headOfSpan

protected GCHeapRegionDescriptor headOfSpan

Constructor Details

GCHeapRegionDescriptorSegregated_V1

public GCHeapRegionDescriptorSegregated_V1(com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionDescriptorSegregatedPointer region)
                                    throws CorruptDataException

Throws:

CorruptDataException

Method Details

getSizeClass

public UDATA getSizeClass()

getCellSize

public UDATA getCellSize()
                  throws CorruptDataException

Throws:

CorruptDataException

objectIterator

public GCObjectHeapIterator objectIterator(boolean includeLiveObjects,
 boolean includeDeadObjects)
                                    throws CorruptDataException

Description copied from class: GCHeapRegionDescriptor

Create an iterator which iterates over all objects (if any) in the region

Returns:

an GCObjectHeapIterator which iterates over all objects in the region

Throws:

CorruptDataException

init

protected void init()
             throws CorruptDataException

Throws:

CorruptDataException

getLowAddress

public VoidPointer getLowAddress()

Description copied from class: GCHeapRegionDescriptor

Get the low address of this region

Specified by:

getLowAddress in class GCHeapRegionDescriptor

Returns:

the lowest address in the region

getHighAddress

public VoidPointer getHighAddress()

Description copied from class: GCHeapRegionDescriptor

Get the high address of this region

Specified by:

getHighAddress in class GCHeapRegionDescriptor

Returns:

the first address beyond the end of the region

getSize

public UDATA getSize()

Specified by:

getSize in class GCHeapRegionDescriptor

Returns:

The number of contiguous bytes represented by the receiver

getTypeFlags

public UDATA getTypeFlags()

Description copied from class: GCHeapRegionDescriptor

A helper to request the type flags from the Subspace associated with the receiving region.

Specified by:

getTypeFlags in class GCHeapRegionDescriptor

Returns:

The type flags of the Subspace associated with this region

hasValidMarkMap

public boolean hasValidMarkMap()

Specified by:

hasValidMarkMap in class GCHeapRegionDescriptor

Returns:

true if the region has an up-to-date mark map

containsObjects

public boolean containsObjects()

Specified by:

containsObjects in class GCHeapRegionDescriptor

Returns:

true if the region contains objects

getWalkableHighAddress

protected VoidPointer getWalkableHighAddress()
                                      throws CorruptDataException

Throws:

CorruptDataException

getRegionType

public long getRegionType()

Specified by:

getRegionType in class GCHeapRegionDescriptor

Returns:

this region's current type

getSubSpace

public com.ibm.j9ddr.vm29.pointer.generated.MM_MemorySubSpacePointer getSubSpace()

Specified by:

getSubSpace in class GCHeapRegionDescriptor

Returns:

the memory subspace associated with this region

getMemoryPool

public com.ibm.j9ddr.vm29.pointer.generated.MM_MemoryPoolPointer getMemoryPool()

Specified by:

getMemoryPool in class GCHeapRegionDescriptor

Returns:

the memory subspace associated with this region

isAddressInRegion

public boolean isAddressInRegion(AbstractPointer address)

Description copied from class: GCHeapRegionDescriptor

Determine if the specified address is in the region

Specified by:

isAddressInRegion in class GCHeapRegionDescriptor

Returns:

true if address is within the receiver, false otherwise

isImmortal

public boolean isImmortal()

Specified by:

isImmortal in class GCHeapRegionDescriptor

Returns:

true if the region is associated with a subspace with immortal memory type

isScoped

public boolean isScoped()

Specified by:

isScoped in class GCHeapRegionDescriptor

Returns:

true if the region is associated with a subspace with scoped memory type

getHeadOfSpan

public GCHeapRegionDescriptor getHeadOfSpan()

Specified by:

getHeadOfSpan in class GCHeapRegionDescriptor

Returns:

in a spanning region, return to the HEAD of the span; in non-spanning region return this

descriptionString

public String descriptionString()