org.mmtk.utility.gcspy.drivers

Class ImmortalSpaceDriver

java.lang.Object

org.mmtk.utility.gcspy.drivers.AbstractDriver

org.mmtk.utility.gcspy.drivers.LinearSpaceDriver

org.mmtk.utility.gcspy.drivers.ImmortalSpaceDriver

Direct Known Subclasses:

GenImmortalSpaceDriver

public class ImmortalSpaceDriver
extends LinearSpaceDriver

GCspy driver for the contiguous MMTk ImmortalSpace. Adds features for the Immortal space.

This class extends LinearSpaceDriver, a simple driver for contiguous MMTk spaces such as CopySpace and ImmortalSpace.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	ImmortalSpaceDriver.Closure Used to visit the edges in the immortal object.

Field Summary

Fields

Modifier and Type	Field and Description
private ImmortalSpaceDriver.Closure	closure
private static boolean	DEBUG
private AbstractDriver[]	registeredDrivers

Fields inherited from class org.mmtk.utility.gcspy.drivers.LinearSpaceDriver

allTileNum, arrayObjectsStream, arrayPrimitiveStream, arrayUsedSpaceStream, lastAddress, lastSize, refFromImmortalStream, rootsStream, scalarObjectsStream, scalarUsedSpaceStream, subspace, totalArrayObjects, totalArrayUsedSpace, totalPrimitives, totalRefFromImmortal, totalRoots, totalScalarObjects, totalScalarUsedSpace

Fields inherited from class org.mmtk.utility.gcspy.drivers.AbstractDriver

blockSize, changed, control, CONTROL_BACKGROUND, CONTROL_LINK, CONTROL_SEPARATOR, CONTROL_UNUSED, CONTROL_USED, maxTileNum, mmtkSpace, myClass, name, server, serverSpace, streams

Constructor Summary

Constructors

Constructor and Description
ImmortalSpaceDriver(ServerInterpreter server, String spaceName, Space mmtkSpace, int blockSize, boolean mainSpace) Create a new driver for an immortal Contiguous MMTk space.

Method Summary

Modifier and Type	Method and Description
protected String	getDriverName() Get the name of this driver type.
void	registerDriversForReferenceNotification(AbstractDriver[] drivers) Register a set of AbstractDriver instances to be notified about direct references.
void	scan(ObjectReference object, boolean total) Update the tile statistics.

Methods inherited from class org.mmtk.utility.gcspy.drivers.LinearSpaceDriver

getScanner, handleReferenceFromImmortalSpace, handleRoot, resetData, resetRootsStream, scan, scanCheckPrimitiveArray, setRange, setupControlInfo, setupSummaries, transmit

Methods inherited from class org.mmtk.utility.gcspy.drivers.AbstractDriver

addControl, addStream, controlIsBackground, controlIsSeparator, controlIsUnused, controlIsUsed, controlValues, countTileNum, countTileNum, createServerSpace, createSubspace, getControl, getMaxTileNum, getServerSpace, initControl, initControls, isConnected, maxObjectsPerBlock, scan, scan, send, setControl, setRange, setSpaceInfo, setTilenames

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

registeredDrivers

private AbstractDriver[] registeredDrivers

closure

private final ImmortalSpaceDriver.Closure closure

Constructor Detail

ImmortalSpaceDriver

public ImmortalSpaceDriver(ServerInterpreter server,
                           String spaceName,
                           Space mmtkSpace,
                           int blockSize,
                           boolean mainSpace)

Create a new driver for an immortal Contiguous MMTk space.

Parameters:

server - The GCspy ServerInterpreter

spaceName - The name of this GCspy space

mmtkSpace - The MMTk space

blockSize - The tile size

mainSpace - Is this the main space?

Method Detail

getDriverName

protected String getDriverName()

Get the name of this driver type.

Overrides:

getDriverName in class LinearSpaceDriver

Returns:

The name, "MMTk ImmortalSpaceDriver" for this driver.

scan

public void scan(ObjectReference object,
                 boolean total)

Update the tile statistics.
This method overrides scan iin its superclass to add immortal space features.

Overrides:

scan in class LinearSpaceDriver

Parameters:

object - The current object

total - Whether to accumulate the values

registerDriversForReferenceNotification

public void registerDriversForReferenceNotification(AbstractDriver[] drivers)

Register a set of AbstractDriver instances to be notified about direct references.

Parameters:

drivers - The array of driver objects.