org.mmtk.plan.semispace.gctrace

Class GCTraceConstraints

java.lang.Object

org.mmtk.plan.PlanConstraints

org.mmtk.plan.SimpleConstraints

org.mmtk.plan.StopTheWorldConstraints

org.mmtk.plan.semispace.SSConstraints

org.mmtk.plan.semispace.gctrace.GCTraceConstraints

public class GCTraceConstraints
extends SSConstraints

GCTrace constants.

Constructor Summary

Constructors

Constructor and Description
GCTraceConstraints()

Method Summary

Modifier and Type	Method and Description
boolean	generateGCTrace()
boolean	needsObjectReferenceWriteBarrier()

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

gcHeaderBits, gcHeaderWords, movesObjects, numSpecializedScans

Methods inherited from class org.mmtk.plan.PlanConstraints

addressBulkCopySupported, booleanBulkCopySupported, byteBulkCopySupported, charBulkCopySupported, doubleBulkCopySupported, extentBulkCopySupported, floatBulkCopySupported, generational, intBulkCopySupported, longBulkCopySupported, maxNonLOSCopyBytes, maxNonLOSDefaultAllocBytes, 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, 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

GCTraceConstraints

public GCTraceConstraints()

Method Detail

needsObjectReferenceWriteBarrier

public boolean needsObjectReferenceWriteBarrier()

Overrides:

needsObjectReferenceWriteBarrier in class PlanConstraints

Returns:

true if this Plan requires write barriers on object references.

generateGCTrace

public boolean generateGCTrace()

Overrides:

generateGCTrace in class PlanConstraints

Returns:

true if this plan contains GCTrace.