OpenJDK 27 · sun.jvm.hotspot.gc.shared.ContiguousSpace

A ContiguousSpace describes a heap area.

Invariant: bottom() and end() are on page_size boundaries and:

bottom() <= top() <= end()

top() is inclusive and end() is exclusive.

Field Summary

Modifier and Type	Field and Description
private static AddressField	bottomField
private static AddressField	endField
private static AddressField	topField

Access	Constructor and Description
public	ContiguousSpace(Address addr)

Modifier and Type	Method and Description
public Address	bottom()
public OopHandle	bottomAsOopHandle() Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism
public long	capacity() Returned value is in bytes
public boolean	contains(Address p) Testers
public Address	end()
public long	free()
public List<MemRegion>	getLiveRegions() Implements sun.jvm.hotspot.gc.shared.LiveRegionsProvider.getLiveRegions. Returns regions of Space where live objects live
private static synchronized void	initialize(TypeDataBase db)
public OopHandle	nextOopHandle(OopHandle handle, long size) Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism
public void	print()
public void	printOn(PrintStream tty)
public Address	top()
public long	used()
public MemRegion	usedRegion() In a contiguous space we have a more obvious bound on what parts contain objects.

Inherited from sun.jvm.hotspot.runtime.VMObject:: equals getAddress hashCode toString

bottomField	back to summary
private static AddressField bottomField

endField	back to summary
private static AddressField endField

topField	back to summary
private static AddressField topField

ContiguousSpace	back to summary
public ContiguousSpace(Address addr)

bottom	back to summary
public Address bottom()

bottomAsOopHandle	back to summary
public OopHandle bottomAsOopHandle() Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism

capacity	back to summary
public long capacity() Returned value is in bytes

contains	back to summary
public boolean contains(Address p) Testers

end	back to summary
public Address end()

free	back to summary
public long free()

getLiveRegions	back to summary
public List<MemRegion> getLiveRegions() Implements sun.jvm.hotspot.gc.shared.LiveRegionsProvider.getLiveRegions. Returns regions of Space where live objects live

getLiveRegions

public List<MemRegion> getLiveRegions()

Returns regions of Space where live objects live

initialize	back to summary
private static synchronized void initialize(TypeDataBase db)

nextOopHandle	back to summary
public OopHandle nextOopHandle(OopHandle handle, long size) Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism

print	back to summary
public void print()

printOn	back to summary
public void printOn(PrintStream tty)

top	back to summary
public Address top()

used	back to summary
public long used()

usedRegion	back to summary
public MemRegion usedRegion() In a contiguous space we have a more obvious bound on what parts contain objects.