org.mmtk.plan.copyms

Class CopyMSCollector

java.lang.Object

org.mmtk.plan.CollectorContext

org.mmtk.plan.ParallelCollector

org.mmtk.plan.SimpleCollector

org.mmtk.plan.StopTheWorldCollector

org.mmtk.plan.copyms.CopyMSCollector

public class CopyMSCollector
extends StopTheWorldCollector

This class implements per-collector thread behavior and state for the CopyMS plan.

Specifically, this class defines CopyMS collection behavior (through trace and the collectionPhase method), and collection-time allocation into the mature space.

See Also:

CopyMS, CopyMSMutator, StopTheWorldCollector, CollectorContext

Field Summary

Fields

Modifier and Type	Field and Description
protected LargeObjectLocal	los
private MarkSweepLocal	mature
private CopyMSTraceLocal	trace

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
CopyMSCollector() Create a new (local) instance.

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.
TraceLocal	getCurrentTrace()
private static CopyMS	global()
void	postCopy(ObjectReference object, ObjectReference typeRef, int bytes, int allocator) Perform any post-copy actions.

Methods inherited from class org.mmtk.plan.StopTheWorldCollector

collect, 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

mature

private final MarkSweepLocal mature

trace

private final CopyMSTraceLocal trace

los

protected final LargeObjectLocal los

Constructor Detail

CopyMSCollector

public CopyMSCollector()

Create a new (local) instance.

Method Detail

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)

Description copied from class: CollectorContext

Perform any post-copy actions.

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.

collectionPhase

public final void collectionPhase(short phaseId,
                                  boolean primary)

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

Overrides:

collectionPhase in class SimpleCollector

Parameters:

phaseId - The unique phase identifier

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

global

private static CopyMS global()

Returns:

the active global plan as an MS instance.

getCurrentTrace

public final TraceLocal getCurrentTrace()

Overrides:

getCurrentTrace in class ParallelCollector

Returns:

The current trace instance.