org.mmtk.plan.semispace.usePrimitiveWriteBarriers

Class UsePrimitiveWriteBarriersConstraints

java.lang.Object

org.mmtk.plan.PlanConstraints

org.mmtk.plan.SimpleConstraints

org.mmtk.plan.StopTheWorldConstraints

org.mmtk.plan.semispace.SSConstraints

org.mmtk.plan.semispace.usePrimitiveWriteBarriers.UsePrimitiveWriteBarriersConstraints

public class UsePrimitiveWriteBarriersConstraints
extends SSConstraints

UsePrimitiveWriteBarriers common constants.

Constructor Summary

Constructors

Constructor and Description
UsePrimitiveWriteBarriersConstraints()

Method Summary

Modifier and Type	Method and Description
boolean	booleanBulkCopySupported()
boolean	byteBulkCopySupported()
boolean	charBulkCopySupported()
boolean	doubleBulkCopySupported()
boolean	floatBulkCopySupported()
boolean	intBulkCopySupported()
boolean	longBulkCopySupported()
boolean	needsAddressWriteBarrier()
boolean	needsBooleanWriteBarrier()
boolean	needsByteWriteBarrier()
boolean	needsCharWriteBarrier()
boolean	needsDoubleWriteBarrier()
boolean	needsExtentWriteBarrier()
boolean	needsFloatWriteBarrier()
boolean	needsIntWriteBarrier()
boolean	needsLongWriteBarrier()
boolean	needsOffsetWriteBarrier()
boolean	needsShortWriteBarrier()
boolean	needsWordWriteBarrier()
boolean	shortBulkCopySupported()

Methods inherited from class org.mmtk.plan.semispace.SSConstraints

gcHeaderBits, gcHeaderWords, movesObjects, numSpecializedScans

Methods inherited from class org.mmtk.plan.PlanConstraints

addressBulkCopySupported, extentBulkCopySupported, generateGCTrace, generational, maxNonLOSCopyBytes, maxNonLOSDefaultAllocBytes, maxNonLOSNonMovingAllocBytes, maxNumGCThreads, needsAddressReadBarrier, needsBooleanReadBarrier, needsByteReadBarrier, needsCharReadBarrier, needsConcurrentWorkers, needsDoubleReadBarrier, needsExtentReadBarrier, needsFloatReadBarrier, needsForwardAfterLiveness, needsIntReadBarrier, needsJavaLangReferenceReadBarrier, needsLinearScan, needsLogBitInHeader, needsLongReadBarrier, needsObjectReferenceNonHeapReadBarrier, needsObjectReferenceNonHeapWriteBarrier, needsObjectReferenceReadBarrier, needsObjectReferenceWriteBarrier, needsOffsetReadBarrier, needsShortReadBarrier, needsWordReadBarrier, objectReferenceBulkCopySupported, offsetBulkCopySupported, withGCspy, wordBulkCopySupported

Methods inherited from class java.lang.Object

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

Constructor Detail

UsePrimitiveWriteBarriersConstraints

public UsePrimitiveWriteBarriersConstraints()

Method Detail

needsBooleanWriteBarrier

public boolean needsBooleanWriteBarrier()

Overrides:

needsBooleanWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on booleans.

booleanBulkCopySupported

public boolean booleanBulkCopySupported()

Overrides:

booleanBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk boolean arraycopy barriers.

needsByteWriteBarrier

public boolean needsByteWriteBarrier()

Overrides:

needsByteWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on bytes.

byteBulkCopySupported

public boolean byteBulkCopySupported()

Overrides:

byteBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk byte arraycopy barriers.

needsCharWriteBarrier

public boolean needsCharWriteBarrier()

Overrides:

needsCharWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on chars.

charBulkCopySupported

public boolean charBulkCopySupported()

Overrides:

charBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk char arraycopy barriers.

needsShortWriteBarrier

public boolean needsShortWriteBarrier()

Overrides:

needsShortWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on shorts.

shortBulkCopySupported

public boolean shortBulkCopySupported()

Overrides:

shortBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk short arraycopy barriers.

needsIntWriteBarrier

public boolean needsIntWriteBarrier()

Overrides:

needsIntWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on ints.

intBulkCopySupported

public boolean intBulkCopySupported()

Overrides:

intBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk int arraycopy barriers.

needsLongWriteBarrier

public boolean needsLongWriteBarrier()

Overrides:

needsLongWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on longs.

longBulkCopySupported

public boolean longBulkCopySupported()

Overrides:

longBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk long arraycopy barriers.

needsFloatWriteBarrier

public boolean needsFloatWriteBarrier()

Overrides:

needsFloatWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on floats.

floatBulkCopySupported

public boolean floatBulkCopySupported()

Overrides:

floatBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk float arraycopy barriers.

needsDoubleWriteBarrier

public boolean needsDoubleWriteBarrier()

Overrides:

needsDoubleWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on doubles.

doubleBulkCopySupported

public boolean doubleBulkCopySupported()

Overrides:

doubleBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk double arraycopy barriers.

needsWordWriteBarrier

public boolean needsWordWriteBarrier()

Overrides:

needsWordWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on Words.

needsAddressWriteBarrier

public boolean needsAddressWriteBarrier()

Overrides:

needsAddressWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on Address's.

needsExtentWriteBarrier

public boolean needsExtentWriteBarrier()

Overrides:

needsExtentWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on Extents.

needsOffsetWriteBarrier

public boolean needsOffsetWriteBarrier()

Overrides:

needsOffsetWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on Offsets.