org.mmtk.plan.refcount.generational

Class GenRCCollector

java.lang.Object

org.mmtk.plan.CollectorContext

org.mmtk.plan.ParallelCollector

org.mmtk.plan.SimpleCollector

org.mmtk.plan.StopTheWorldCollector

org.mmtk.plan.refcount.RCBaseCollector

org.mmtk.plan.refcount.generational.GenRCCollector

public class GenRCCollector
extends RCBaseCollector

This class implements the collector context for a simple reference counting collector.

Field Summary

Fields

Modifier and Type	Field and Description
private GenRCModifiedProcessor	modProcessor
private ExplicitFreeListLocal	rc
private GenRCFindRootSetTraceLocal	rootTrace

Fields inherited from class org.mmtk.plan.refcount.RCBaseCollector

newRootBuffer

Fields inherited from class org.mmtk.plan.SimpleCollector

sanityLocal

Fields inherited from class org.mmtk.plan.ParallelCollector

group

Fields inherited from class org.mmtk.plan.CollectorContext

log

Constructor Summary

Constructors

Constructor and Description
GenRCCollector()

Method Summary

Modifier and Type	Method and Description
Address	allocCopy(ObjectReference original, int bytes, int align, int offset, int allocator) Allocate space for copying an object (this method does not copy the object, it only allocates space)
void	collectionPhase(short phaseId, boolean primary) Perform a (local, i.e.per-collector) collection phase.
protected TransitiveClosure	getModifiedProcessor()
protected TraceLocal	getRootTrace()
void	postCopy(ObjectReference object, ObjectReference typeRef, int bytes, int allocator) Perform any post-copy actions.

Methods inherited from class org.mmtk.plan.refcount.RCBaseCollector

collect, getCurrentTrace, getModBuffer, global

Methods inherited from class org.mmtk.plan.StopTheWorldCollector

concurrentCollect, concurrentCollectionPhase

Methods inherited from class org.mmtk.plan.ParallelCollector

parallelWorkerCount, parallelWorkerOrdinal, park, rendezvous, run

Methods inherited from class org.mmtk.plan.CollectorContext

copyCheckAllocator, getId, getLog, initCollector

Methods inherited from class java.lang.Object

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

Field Detail

rootTrace

private final GenRCFindRootSetTraceLocal rootTrace

modProcessor

private final GenRCModifiedProcessor modProcessor

rc

private final ExplicitFreeListLocal rc

Constructor Detail

GenRCCollector

public GenRCCollector()

Method Detail

collectionPhase

public final void collectionPhase(short phaseId,
                                  boolean primary)

Perform a (local, i.e.per-collector) collection phase.

Overrides:

collectionPhase in class RCBaseCollector

Parameters:

phaseId - The unique phase identifier

primary - Should this thread be used to execute any single-threaded local operations?

allocCopy

public final Address allocCopy(ObjectReference original,
                               int bytes,
                               int align,
                               int offset,
                               int allocator)

Allocate space for copying an object (this method does not copy the object, it only allocates space)

Overrides:

allocCopy in class CollectorContext

Parameters:

original - The object that is being copied.

bytes - The size of the space to be allocated (in bytes)

align - Required alignment for the copy

offset - Offset associated with the alignment.

allocator - The allocator associated with this request

Returns:

The address of the first byte of the allocated region

postCopy

public final void postCopy(ObjectReference object,
                           ObjectReference typeRef,
                           int bytes,
                           int allocator)

Perform any post-copy actions.

In this case nothing is required.

Overrides:

postCopy in class CollectorContext

Parameters:

object - The newly allocated object.

typeRef - the type reference for the instance being created.

bytes - The size of the space to be allocated (in bytes).

allocator - The allocator statically assigned to this allocation.

getModifiedProcessor

protected final TransitiveClosure getModifiedProcessor()

Specified by:

getModifiedProcessor in class RCBaseCollector

Returns:

the modified processor to use.

getRootTrace

protected final TraceLocal getRootTrace()

Specified by:

getRootTrace in class RCBaseCollector

Returns:

the root trace to use.