GenImmortalSpaceDriver (Jikes RVM API)

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org.mmtk.utility.gcspy.drivers
Class GenImmortalSpaceDriver

java.lang.Object
  org.mmtk.utility.gcspy.drivers.AbstractDriver
      org.mmtk.utility.gcspy.drivers.LinearSpaceDriver
          org.mmtk.utility.gcspy.drivers.ImmortalSpaceDriver
              org.mmtk.utility.gcspy.drivers.GenImmortalSpaceDriver

public class GenImmortalSpaceDriver
extends ImmortalSpaceDriver
extends ImmortalSpaceDriver

GCspy driver for the MMTk generational immortal space. Additional Stream for remset references. This class extends ImmortalSpaceDriver, a simple driver for the contiguous MMTk ImmortalSpace.

Field Summary
`private static boolean`	`DEBUG`
`protected ShortStream`	`remsetStream` The Stream for newly promoted objects
`protected int`	`totalRemset` Statistics for remset references

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
`GenImmortalSpaceDriver(ServerInterpreter server, String spaceName, Space mmtkSpace, int blockSize, boolean mainSpace)` Create a new driver for a generational immortal space.

Method Summary
`private ShortStream`	`createRemsetStream()` Helper methods to create the additional streams
`protected String`	`getDriverName()` Get the name of this driver type.
`boolean`	`handleRemsetAddress(Address addr)` Handle a remset address
`void`	`resetRemsetStream()` Reset the remset Stream The remset Stream has to be reset seperately because we do not gather data in the usual way using scan().
`protected void`	`setupSummaries()` Setup summaries part of the `transmit` method.

Methods inherited from class org.mmtk.utility.gcspy.drivers.ImmortalSpaceDriver
`registerDriversForReferenceNotification, scan`

Methods inherited from class org.mmtk.utility.gcspy.drivers.LinearSpaceDriver
`getScanner, handleReferenceFromImmortalSpace, handleRoot, resetData, resetRootsStream, scan, scanCheckPrimitiveArray, setRange, setupControlInfo, 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

remsetStream

protected ShortStream remsetStream

The Stream for newly promoted objects

totalRemset

protected int totalRemset

Statistics for remset references

Constructor Detail

GenImmortalSpaceDriver

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

Create a new driver for a generational immortal 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 ImmortalSpaceDriver

Returns:: The name, "MMTk GenImmortalSpaceDriver" for this driver.

createRemsetStream

private ShortStream createRemsetStream()

Helper methods to create the additional streams

setupSummaries

protected void setupSummaries()

Setup summaries part of the transmit method.

Overrides method in superclass to handle additional Stream.

Overrides:: setupSummaries in class LinearSpaceDriver

handleRemsetAddress

public boolean handleRemsetAddress(Address addr)

Handle a remset address

Parameters:: addr - Remset Address
Returns:: true if the given Address is in this subspace.

resetRemsetStream

public void resetRemsetStream()

Reset the remset Stream The remset Stream has to be reset seperately because we do not gather data in the usual way using scan().