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Memory.Manager
Class MarkAndSweep  

java.lang.Object
  Memory.Manager.MarkAndSweep

All Implemented Interfaces:

GCConstants

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public class MarkAndSweep

extends java.lang.Object

implements GCConstants

MarkAndSweep collector, adapted from Jikes RVM version written by Dick Attanasio.

Version:

$Id: MarkAndSweep.java,v 1.5 2003/05/12 10:05:19 joewhaley Exp $

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Field Summary
private static Memory.Heap.BootHeap	bootHeap
(package private) static boolean	flag2nd
(package private) static boolean	gc_collect_now
(package private) static int	GC_RETRY_COUNT
(package private) static boolean	gcInProgress
static Memory.Heap.ImmortalHeap	immortalHeap
private static Memory.Heap.LargeHeap	largeHeap
private static Memory.Heap.MallocHeap	mallocHeap
static boolean	movesObjects
(package private) static int	SMALL_SPACE_MAX
private static Memory.Heap.SegregatedListHeap	smallHeap
(package private) static int	verbose           Control chattering during progress of GC
static boolean	writeBarrier

 

Fields inherited from interface Memory.Manager.GCConstants

GC_BLOCKSIZE, GC_MAX_SMALL_SIZE, GC_SIZES, GC_SIZEVALUES, LOG_GC_BLOCKSIZE

 

Constructor Summary

MarkAndSweep()

 

Method Summary
static java.lang.Object	allocateArray(int numElements, int size, java.lang.Object[] tib)           Allocate an array object.
static java.lang.Object	allocateObject(int size, java.lang.Object[] tib)           Allocate a "scalar" (non-array) Java object.
static long	allSmallFreeMemory()
static long	allSmallUsableMemory()
static void	boot()
static void	collect()
static long	freeMemory()
(package private) static void	gc_emptyWorkQueue()
(package private) static Memory.HeapAddress	gc_getMatureSpace(int size)
(package private) static boolean	gc_isLive(Memory.HeapAddress ref)
(package private) static void	gc_scanObjectOrArray(Memory.HeapAddress objRef)
static void	gc()
static void	gc1(java.lang.String why, int size)
static boolean	gcInProgress()           "getter" function for gcInProgress
static void	gcSetup(int numSysThreads)
static java.lang.Object	getLiveObject(java.lang.Object obj)
static void	heapExhausted(Memory.Heap.Heap heap, int size, int count)           Handle heap exhaustion.
static void	init()           Setup done during bootimage building
private static void	prepareNonParticipatingVPsForAllocation()
private static void	prepareNonParticipatingVPsForGC()
static void	printclass(Memory.HeapAddress ref)
static boolean	processFinalizerCandidate(Memory.HeapAddress ref)
static void	processPtrField(Memory.Address location)           Process an object reference field during collection.
static Memory.HeapAddress	processPtrValue(Memory.HeapAddress ref)           Process an object reference (value) during collection.
(package private) static void	processWriteBufferEntry(Memory.HeapAddress ref)
static void	setupProcessor(Scheduler.jq_NativeThread st)
(package private) static void	showParameter()
static long	totalMemory()

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

verbose

static int verbose

Control chattering during progress of GC

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movesObjects

public static final boolean movesObjects

See Also:

Constant Field Values

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writeBarrier

public static final boolean writeBarrier

See Also:

Constant Field Values

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SMALL_SPACE_MAX

static final int SMALL_SPACE_MAX

See Also:

Constant Field Values

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GC_RETRY_COUNT

static final int GC_RETRY_COUNT

See Also:

Constant Field Values

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flag2nd

static boolean flag2nd

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gc_collect_now

static boolean gc_collect_now

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bootHeap

private static Memory.Heap.BootHeap bootHeap

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mallocHeap

private static Memory.Heap.MallocHeap mallocHeap

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smallHeap

private static Memory.Heap.SegregatedListHeap smallHeap

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immortalHeap

public static Memory.Heap.ImmortalHeap immortalHeap

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largeHeap

private static Memory.Heap.LargeHeap largeHeap

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gcInProgress

static boolean gcInProgress

Constructor Detail

MarkAndSweep

public MarkAndSweep()

Method Detail

gcInProgress

public static boolean gcInProgress()

"getter" function for gcInProgress

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init

public static void init()

Setup done during bootimage building

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boot

public static void boot()

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showParameter

static void showParameter()

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allocateObject

public static java.lang.Object allocateObject(int size,
                                              java.lang.Object[] tib)
                                       throws java.lang.OutOfMemoryError

Allocate a "scalar" (non-array) Java object.

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allocateArray

public static java.lang.Object allocateArray(int numElements,
                                             int size,
                                             java.lang.Object[] tib)
                                      throws java.lang.OutOfMemoryError

Allocate an array object.

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heapExhausted

public static void heapExhausted(Memory.Heap.Heap heap,
                                 int size,
                                 int count)

Handle heap exhaustion.

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gcSetup

public static void gcSetup(int numSysThreads)

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prepareNonParticipatingVPsForGC

private static void prepareNonParticipatingVPsForGC()

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prepareNonParticipatingVPsForAllocation

private static void prepareNonParticipatingVPsForAllocation()

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collect

public static void collect()

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gc_getMatureSpace

static Memory.HeapAddress gc_getMatureSpace(int size)

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gc_scanObjectOrArray

static void gc_scanObjectOrArray(Memory.HeapAddress objRef)

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gc_emptyWorkQueue

static void gc_emptyWorkQueue()

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gc

public static void gc()

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gc1

public static void gc1(java.lang.String why,
                       int size)

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totalMemory

public static long totalMemory()

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freeMemory

public static long freeMemory()

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allSmallFreeMemory

public static long allSmallFreeMemory()

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allSmallUsableMemory

public static long allSmallUsableMemory()

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gc_isLive

static boolean gc_isLive(Memory.HeapAddress ref)

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setupProcessor

public static void setupProcessor(Scheduler.jq_NativeThread st)

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printclass

public static void printclass(Memory.HeapAddress ref)

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processWriteBufferEntry

static void processWriteBufferEntry(Memory.HeapAddress ref)

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getLiveObject

public static java.lang.Object getLiveObject(java.lang.Object obj)

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processFinalizerCandidate

public static boolean processFinalizerCandidate(Memory.HeapAddress ref)

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processPtrField

public static void processPtrField(Memory.Address location)

Process an object reference field during collection.

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processPtrValue

public static Memory.HeapAddress processPtrValue(Memory.HeapAddress ref)

Process an object reference (value) during collection.

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