org.mmtk.plan.refcount.generational

Class GenRCConstraints

java.lang.Object

org.mmtk.plan.PlanConstraints

org.mmtk.plan.SimpleConstraints

org.mmtk.plan.StopTheWorldConstraints

org.mmtk.plan.refcount.RCBaseConstraints

org.mmtk.plan.refcount.generational.GenRCConstraints

public class GenRCConstraints
extends RCBaseConstraints

This class and its subclasses communicate to the host VM/Runtime any features of the selected plan that it needs to know. This is separate from the main Plan/PlanLocal class in order to bypass any issues with ordering of static initialization.

Constructor Summary

Constructors

Constructor and Description
GenRCConstraints()

Method Summary

Modifier and Type	Method and Description
boolean	buildForGenRC()
int	maxNonLOSCopyBytes()
boolean	movesObjects()

Methods inherited from class org.mmtk.plan.refcount.RCBaseConstraints

gcHeaderBits, gcHeaderWords, maxNonLOSDefaultAllocBytes, needsObjectReferenceWriteBarrier, objectReferenceBulkCopySupported

Methods inherited from class org.mmtk.plan.PlanConstraints

addressBulkCopySupported, booleanBulkCopySupported, byteBulkCopySupported, charBulkCopySupported, doubleBulkCopySupported, extentBulkCopySupported, floatBulkCopySupported, generateGCTrace, generational, intBulkCopySupported, longBulkCopySupported, maxNonLOSNonMovingAllocBytes, maxNumGCThreads, needsAddressReadBarrier, needsAddressWriteBarrier, needsBooleanReadBarrier, needsBooleanWriteBarrier, needsByteReadBarrier, needsByteWriteBarrier, needsCharReadBarrier, needsCharWriteBarrier, needsConcurrentWorkers, needsDoubleReadBarrier, needsDoubleWriteBarrier, needsExtentReadBarrier, needsExtentWriteBarrier, needsFloatReadBarrier, needsFloatWriteBarrier, needsForwardAfterLiveness, needsIntReadBarrier, needsIntWriteBarrier, needsJavaLangReferenceReadBarrier, needsLinearScan, needsLogBitInHeader, needsLongReadBarrier, needsLongWriteBarrier, needsObjectReferenceNonHeapReadBarrier, needsObjectReferenceNonHeapWriteBarrier, needsObjectReferenceReadBarrier, needsOffsetReadBarrier, needsOffsetWriteBarrier, needsShortReadBarrier, needsShortWriteBarrier, needsWordReadBarrier, needsWordWriteBarrier, numSpecializedScans, offsetBulkCopySupported, shortBulkCopySupported, withGCspy, wordBulkCopySupported

Methods inherited from class java.lang.Object

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

Constructor Detail

GenRCConstraints

public GenRCConstraints()

Method Detail

movesObjects

public boolean movesObjects()

Overrides:

movesObjects in class PlanConstraints

Returns:

true if this Plan moves objects.

maxNonLOSCopyBytes

public int maxNonLOSCopyBytes()

Overrides:

maxNonLOSCopyBytes in class PlanConstraints

Returns:

Size (in bytes) beyond which copied objects must be copied to the LOS

buildForGenRC

public boolean buildForGenRC()

Overrides:

buildForGenRC in class RCBaseConstraints

Returns:

true if we are building for generational reference counting