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org.mmtk.plan.copyms
Class CopyMSCollector

java.lang.Object
  extended by org.mmtk.plan.CollectorContext
      extended by org.mmtk.plan.SimpleCollector
          extended by org.mmtk.plan.StopTheWorldCollector
              extended by org.mmtk.plan.copyms.CopyMSCollector
All Implemented Interfaces:
Constants
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
protected  LargeObjectLocal los
           
private  MarkSweepLocal mature
          Instance fields
private  CopyMSTraceLocal trace
           
 
Fields inherited from class org.mmtk.plan.CollectorContext
immortal, resetConcurrentWork, sanityLocal
 
Fields inherited from interface org.mmtk.utility.Constants
ALIGNMENT_VALUE, ARRAY_ELEMENT, BITS_IN_ADDRESS, BITS_IN_BYTE, BITS_IN_CHAR, BITS_IN_INT, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BYTE, BYTES_IN_CHAR, BYTES_IN_INT, BYTES_IN_KBYTE, BYTES_IN_MBYTE, BYTES_IN_PAGE, BYTES_IN_SHORT, BYTES_IN_WORD, CARD_MASK, CARD_META_PAGES_PER_REGION, INSTANCE_FIELD, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BYTE, LOG_BITS_IN_CHAR, LOG_BITS_IN_INT, LOG_BITS_IN_PAGE, LOG_BITS_IN_SHORT, LOG_BITS_IN_WORD, LOG_BYTES_IN_ADDRESS, LOG_BYTES_IN_ADDRESS_SPACE, LOG_BYTES_IN_BYTE, LOG_BYTES_IN_CHAR, LOG_BYTES_IN_INT, LOG_BYTES_IN_KBYTE, LOG_BYTES_IN_MBYTE, LOG_BYTES_IN_PAGE, LOG_BYTES_IN_SHORT, LOG_BYTES_IN_WORD, LOG_CARD_BYTES, LOG_CARD_GRAIN, LOG_CARD_META_BYTES, LOG_CARD_META_PAGES, LOG_CARD_META_SIZE, LOG_CARD_UNITS, LOG_MIN_ALIGNMENT, MAX_ALIGNMENT, MAX_BYTES_PADDING, MAX_INT, MIN_ALIGNMENT, MIN_INT, SUPPORT_CARD_SCANNING
 
Constructor Summary
CopyMSCollector()
          Create a new (local) instance.
 
Method Summary
 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 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.CollectorContext
clearResetConcurrentWork, copyCheckAllocator, getId, initCollector, resetConcurrentWork
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

mature

private MarkSweepLocal mature
Instance fields

trace

private 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 - A reference to the original object
bytes - The size of the space to be allocated (in bytes)
align - The requested alignment.
offset - The alignment offset.
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.

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 per-collector collection phase.

Overrides:
collectionPhase in class SimpleCollector
Parameters:
phaseId - The collection phase to perform
primary - Use this thread for single-threaded local activities.

global

private static CopyMS global()
Returns:
the active global plan as an MS instance.

getCurrentTrace

public final TraceLocal getCurrentTrace()
Specified by:
getCurrentTrace in class CollectorContext
Returns:
The current trace instance.
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