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sun.jvm.hotspot.gc.serial

public abstract Class Generation

Class Inheritance

extends VMObject

java.lang.Object
sun.jvm.hotspot.runtime.VMObject
sun.jvm.hotspot.gc.serial.Generation

Known Direct Subclasses

sun.jvm.hotspot.gc.serial.TenuredGeneration, sun.jvm.hotspot.gc.serial.DefNewGeneration

Imports

java.io.*, java.util.*, sun.jvm.hotspot.debugger.*, sun.jvm.hotspot.gc.shared.*, sun.jvm.hotspot.memory.*, sun.jvm.hotspot.runtime.*, sun.jvm.hotspot.types.*, sun.jvm.hotspot.utilities.Observable, .Observer

The (supported) Generation hierarchy currently looks like this:

Generation
- TenuredGeneration
- DefNewGeneration

Field Summary

Modifier and Type	Field and Description
protected static final int	K
private static long	reservedFieldOffset
private static long	virtualSpaceFieldOffset

Inherited from sun.jvm.hotspot.runtime.VMObject:: addr

Constructor Summary

Access	Constructor and Description
public	Generation(Address addr)

Method Summary

Modifier and Type	Method and Description
public abstract long	capacity() The maximum number of object bytes the generation can currently hold.
public abstract long	contiguousAvailable() The largest number of contiguous free words in the generation, including expansion.
public abstract long	free() The number of free bytes in the gen.
private static synchronized void	initialize(TypeDataBase db)
public boolean	isInReserved(Address p) Returns "TRUE" iff "p" points into the reserved area of the generation.
public abstract void	liveRegionsIterate(LiveRegionsClosure closure) Iteration - do not use for time critical operations
public abstract String	name()
public void	print()
public abstract void	printOn(PrintStream tty)
public MemRegion	reserved()
public abstract long	used() The number of used bytes in the gen.
public MemRegion	usedRegion() Returns a region guaranteed to contain all the objects in the generation.
protected VirtualSpace	virtualSpace()

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

Field Detail

K	back to summary
protected static final int K

reservedFieldOffset	back to summary
private static long reservedFieldOffset

virtualSpaceFieldOffset	back to summary
private static long virtualSpaceFieldOffset

Constructor Detail

Generation	back to summary
public Generation(Address addr)

Method Detail

capacity	back to summary
public abstract long capacity() The maximum number of object bytes the generation can currently hold.

contiguousAvailable	back to summary
public abstract long contiguousAvailable() The largest number of contiguous free words in the generation, including expansion. (VM's version assumes it is called at a safepoint.)

free	back to summary
public abstract long free() The number of free bytes in the gen.

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

isInReserved	back to summary
public boolean isInReserved(Address p) Returns "TRUE" iff "p" points into the reserved area of the generation.

liveRegionsIterate	back to summary
public abstract void liveRegionsIterate(LiveRegionsClosure closure) Iteration - do not use for time critical operations

name	back to summary
public abstract String name()

print	back to summary
public void print()

printOn	back to summary
public abstract void printOn(PrintStream tty)

reserved	back to summary
public MemRegion reserved()

used	back to summary
public abstract long used() The number of used bytes in the gen.

usedRegion	back to summary
public MemRegion usedRegion() Returns a region guaranteed to contain all the objects in the generation.

virtualSpace	back to summary
protected VirtualSpace virtualSpace()