Overview  Package   Class  Use  Tree  Serialized  Deprecated  Index  Help 
 PREV CLASS   NEXT CLASS FRAMES    NO FRAMES    
SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD

org.mmtk.policy
Class RawPageSpace

java.lang.Object
  extended by org.mmtk.policy.Space
      extended by org.mmtk.policy.RawPageSpace
All Implemented Interfaces:
Constants
public final class RawPageSpace
extends Space
implements Constants

Each instance of this class corresponds to one raw page space.

This class provides access to raw memory for managing internal meta data.

Nested Class Summary
 
Nested classes/interfaces inherited from class org.mmtk.policy.Space
Space.SpaceVisitor
 
Field Summary
 
Fields inherited from class org.mmtk.policy.Space
AVAILABLE_BYTES, AVAILABLE_END, AVAILABLE_PAGES, AVAILABLE_START, BYTES_IN_CHUNK, contiguous, descriptor, extent, headDiscontiguousRegion, HEAP_END, HEAP_START, immortal, LOG_ADDRESS_SPACE, LOG_BYTES_IN_CHUNK, MAX_CHUNKS, MAX_SPACES, movable, PAGES_IN_CHUNK, pr, start, zeroed
 
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
RawPageSpace(String name, VMRequest vmRequest)
          The caller specifies the region of virtual memory to be used for this space.
 
Method Summary
 boolean isLive(ObjectReference object)
          Is the object in this space alive?
 void prepare()
           
 void release()
           
 void release(Address first)
          Release a group of pages that were allocated together.
 ObjectReference traceObject(TransitiveClosure trace, ObjectReference object)
          Trace an object.
 
Methods inherited from class org.mmtk.policy.Space
acquire, availablePhysicalPages, chunkAlign, chunkAlign, committedPages, cumulativeCommittedPages, eagerlyMmapMMTkContiguousSpaces, eagerlyMmapMMTkDiscontiguousSpaces, eagerlyMmapMMTkSpaces, getDescriptor, getDiscontigEnd, getDiscontigStart, getExtent, getFracAvailable, getHeadDiscontiguousRegion, getIndex, getName, getSpaceForAddress, getSpaceForObject, getStart, growDiscontiguousSpace, growSpace, isImmortal, isImmortal, isInSpace, isInSpace, isMappedAddress, isMappedObject, isMovable, isMovable, isReachable, printUsageMB, printUsagePages, printVMMap, releaseAllChunks, releaseDiscontiguousChunks, requiredChunks, reservedPages, setZeroingApproach, skipConcurrentZeroing, triggerConcurrentZeroing, visitSpaces
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RawPageSpace

public RawPageSpace(String name,
                    VMRequest vmRequest)
The caller specifies the region of virtual memory to be used for this space. If this region conflicts with an existing space, then the constructor will fail.

Parameters:
name - The name of this space (used when printing error messages etc)
vmRequest - An object describing the virtual memory requested.
Method Detail

prepare

public void prepare()

release

public void release()

release

public void release(Address first)
Release a group of pages that were allocated together.

Specified by:
release in class Space
Parameters:
first - The first page in the group of pages that were allocated together.

traceObject

public ObjectReference traceObject(TransitiveClosure trace,
                                   ObjectReference object)
Trace an object.

This makes no sense for a raw page space and should never be called.

Specified by:
traceObject in class Space
Parameters:
object - The object to be traced.
trace - The trace being conducted.
Returns:
zero: calling this is an error.

isLive

public boolean isLive(ObjectReference object)
Description copied from class: Space
Is the object in this space alive?

Specified by:
isLive in class Space
Parameters:
object - The object reference.
Returns:
true if the object is live.
Overview  Package   Class  Use  Tree  Serialized  Deprecated  Index  Help 
 PREV CLASS   NEXT CLASS FRAMES    NO FRAMES    
SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD