org.mmtk.plan.stickyimmix

Class StickyImmixConstraints

java.lang.Object

org.mmtk.plan.PlanConstraints

org.mmtk.plan.SimpleConstraints

org.mmtk.plan.StopTheWorldConstraints

org.mmtk.plan.immix.ImmixConstraints

org.mmtk.plan.stickyimmix.StickyImmixConstraints

public class StickyImmixConstraints
extends ImmixConstraints

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
StickyImmixConstraints()

Method Summary

Modifier and Type	Method and Description
int	maxNonLOSCopyBytes()
int	maxNonLOSDefaultAllocBytes()
boolean	needsLogBitInHeader()
boolean	needsObjectReferenceWriteBarrier()
int	numSpecializedScans()
boolean	objectReferenceBulkCopySupported()

Methods inherited from class org.mmtk.plan.immix.ImmixConstraints

gcHeaderBits, gcHeaderWords, movesObjects

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, needsLongReadBarrier, needsLongWriteBarrier, needsObjectReferenceNonHeapReadBarrier, needsObjectReferenceNonHeapWriteBarrier, needsObjectReferenceReadBarrier, needsOffsetReadBarrier, needsOffsetWriteBarrier, needsShortReadBarrier, needsShortWriteBarrier, needsWordReadBarrier, needsWordWriteBarrier, offsetBulkCopySupported, shortBulkCopySupported, withGCspy, wordBulkCopySupported

Methods inherited from class java.lang.Object

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

Constructor Detail

StickyImmixConstraints

public StickyImmixConstraints()

Method Detail

numSpecializedScans

public int numSpecializedScans()

Overrides:

numSpecializedScans in class ImmixConstraints

Returns:

The number of specialized scans. We need nursery & full heap.

needsObjectReferenceWriteBarrier

public boolean needsObjectReferenceWriteBarrier()

Overrides:

needsObjectReferenceWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on object references.

needsLogBitInHeader

public boolean needsLogBitInHeader()

Overrides:

needsLogBitInHeader in class PlanConstraints

Returns:

true if this Plan requires a header bit for object logging

maxNonLOSDefaultAllocBytes

public int maxNonLOSDefaultAllocBytes()

Overrides:

maxNonLOSDefaultAllocBytes in class ImmixConstraints

Returns:

Size (in bytes) beyond which new regular objects must be allocated to the LOS

maxNonLOSCopyBytes

public int maxNonLOSCopyBytes()

Overrides:

maxNonLOSCopyBytes in class ImmixConstraints

Returns:

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

objectReferenceBulkCopySupported

public boolean objectReferenceBulkCopySupported()

Overrides:

objectReferenceBulkCopySupported in class PlanConstraints

Returns:

true if this Plan can perform bulk object arraycopy barriers.