org.mmtk.plan.refcount.backuptrace

Class BTTraceLocal

java.lang.Object

org.mmtk.plan.TransitiveClosure

org.mmtk.plan.TraceLocal

org.mmtk.plan.refcount.backuptrace.BTTraceLocal

public final class BTTraceLocal
extends TraceLocal

This class implements the thread-local core functionality for a transitive closure over the heap graph.

Field Summary

Fields inherited from class org.mmtk.plan.TraceLocal

rootLocations, values

Fields inherited from class org.mmtk.plan.TransitiveClosure

specializedScan

Constructor Summary

Constructors

Constructor and Description
BTTraceLocal(Trace trace)

Method Summary

Modifier and Type	Method and Description
boolean	isLive(ObjectReference object) Is the specified object reachable?
ObjectReference	traceObject(ObjectReference object) When we trace a non-root object we do nothing.

Methods inherited from class org.mmtk.plan.TraceLocal

completeTrace, flush, getForwardedFinalizable, getForwardedReference, getForwardedReferenceType, getForwardedReferent, incrementalTrace, isReachable, isReferentLive, logMessage, overwriteReferenceDuringTrace, prepare, processEdge, processInteriorEdge, processNode, processRememberedSets, processRootEdge, processRoots, readyToFinalize, release, reportDelayedRootEdge, retainForFinalize, retainReferent, scanObject, traceObject, willNotMoveInCurrentCollection

Methods inherited from class org.mmtk.plan.TransitiveClosure

getSpecializedScanClass, registerSpecializedScan

Methods inherited from class java.lang.Object

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

Constructor Detail

BTTraceLocal

public BTTraceLocal(Trace trace)

Parameters:

trace - the associated global trace

Method Detail

isLive

public boolean isLive(ObjectReference object)

Is the specified object reachable?

Overrides:

isLive in class TraceLocal

Parameters:

object - The object.

Returns:

true if the object is reachable.

traceObject

public ObjectReference traceObject(ObjectReference object)

When we trace a non-root object we do nothing.

Overrides:

traceObject in class TraceLocal

Parameters:

object - The object to be traced.

Returns:

The new reference to the same object instance.