org.mmtk.utility.sanitychecker

Class SanityChecker

java.lang.Object

org.mmtk.utility.sanitychecker.SanityChecker

public final class SanityChecker
extends Object

This class performs sanity checks for Simple collectors.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALIVE
Trace	checkTrace
(package private) SanityTraceLocal	checkTraceLocal
static long	danglingReferenceCount
static int	DEAD
static long	liveObjectCount
static int	LOG_SANITY_DATA_SIZE
static long	nullReferenceCount
private boolean	preGCSanity
static long	referenceCount
static long	rootReferenceCount
Trace	rootTrace
private SanityDataTable	sanityTable
private SanityLinearScan	scanner
static int	UNSURE

Constructor Summary

Constructors

Constructor and Description
SanityChecker()

Method Summary

Modifier and Type	Method and Description
boolean	collectionPhase(int phaseId) Perform any sanity checking collection phases.
static void	dumpObjectInformation(ObjectReference object) Print out object information (used for warning and error messages)
void	processObject(TraceLocal trace, ObjectReference object, boolean root) Process an object during sanity checking, validating data, incrementing counters and enqueuing if this is the first visit to the object.
void	scanProcessObject(ObjectReference object) Process an object during a linear scan of the heap.

Methods inherited from class java.lang.Object

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

Field Detail

referenceCount

public static long referenceCount

rootReferenceCount

public static long rootReferenceCount

danglingReferenceCount

public static long danglingReferenceCount

nullReferenceCount

public static long nullReferenceCount

liveObjectCount

public static long liveObjectCount

DEAD

public static final int DEAD

See Also:

Constant Field Values

ALIVE

public static final int ALIVE

See Also:

Constant Field Values

UNSURE

public static final int UNSURE

See Also:

Constant Field Values

LOG_SANITY_DATA_SIZE

public static final int LOG_SANITY_DATA_SIZE

See Also:

Constant Field Values

rootTrace

public Trace rootTrace

checkTrace

public Trace checkTrace

sanityTable

private final SanityDataTable sanityTable

preGCSanity

private boolean preGCSanity

checkTraceLocal

final SanityTraceLocal checkTraceLocal

scanner

private final SanityLinearScan scanner

Constructor Detail

SanityChecker

public SanityChecker()

Method Detail

collectionPhase

public boolean collectionPhase(int phaseId)

Perform any sanity checking collection phases.

Parameters:

phaseId - The id to proces

Returns:

true if the phase was handled.

scanProcessObject

public void scanProcessObject(ObjectReference object)

Process an object during a linear scan of the heap. We have already checked all objects in the table. So we are only interested in objects that are not in the sanity table here. We are therefore only looking for leaks here.

Parameters:

object - The object being scanned.

processObject

public void processObject(TraceLocal trace,
                          ObjectReference object,
                          boolean root)

Process an object during sanity checking, validating data, incrementing counters and enqueuing if this is the first visit to the object.

Parameters:

trace - the trace to use for processing

object - The object to mark.

root - true If the object is a root.

dumpObjectInformation

public static void dumpObjectInformation(ObjectReference object)

Print out object information (used for warning and error messages)

Parameters:

object - The object to dump info for.