org.mmtk.plan.poisoned

Class PoisonedConstraints

java.lang.Object

org.mmtk.plan.PlanConstraints

org.mmtk.plan.SimpleConstraints

org.mmtk.plan.StopTheWorldConstraints

org.mmtk.plan.marksweep.MSConstraints

org.mmtk.plan.poisoned.PoisonedConstraints

public class PoisonedConstraints
extends MSConstraints

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
PoisonedConstraints()

Method Summary

Modifier and Type	Method and Description
boolean	needsObjectReferenceNonHeapReadBarrier()
boolean	needsObjectReferenceNonHeapWriteBarrier()
boolean	needsObjectReferenceReadBarrier()
boolean	needsObjectReferenceWriteBarrier()

Methods inherited from class org.mmtk.plan.marksweep.MSConstraints

gcHeaderBits, gcHeaderWords, maxNonLOSDefaultAllocBytes, numSpecializedScans

Methods inherited from class org.mmtk.plan.PlanConstraints

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

Methods inherited from class java.lang.Object

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

Constructor Detail

PoisonedConstraints

public PoisonedConstraints()

Method Detail

needsObjectReferenceWriteBarrier

public boolean needsObjectReferenceWriteBarrier()

Overrides:

needsObjectReferenceWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on object references.

needsObjectReferenceReadBarrier

public boolean needsObjectReferenceReadBarrier()

Overrides:

needsObjectReferenceReadBarrier in class PlanConstraints

Returns:

true if this Plan requires read barriers on object references.

needsObjectReferenceNonHeapWriteBarrier

public boolean needsObjectReferenceNonHeapWriteBarrier()

Overrides:

needsObjectReferenceNonHeapWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires non-heap write barriers on object references.

needsObjectReferenceNonHeapReadBarrier

public boolean needsObjectReferenceNonHeapReadBarrier()

Overrides:

needsObjectReferenceNonHeapReadBarrier in class PlanConstraints

Returns:

true if this Plan requires non-heap read barriers on object references.