Class RootScanner

java.lang.Object

com.ibm.j9ddr.vm29.j9.RootScanner

Direct Known Subclasses:

AddressAwareRootScanner, DTFJJavaRuntime.DTFJRootScanner

public abstract class RootScanner
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	RootScanner.Reachability

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RootScanner()

Method Summary

Modifier and Type	Method	Description
protected abstract void	doClass(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer clazz)
protected void	doClass(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer clazz, VoidPointer address)
protected abstract void	doClassLoader(com.ibm.j9ddr.vm29.pointer.generated.J9ClassLoaderPointer slot)
protected void	doClassLoader(com.ibm.j9ddr.vm29.pointer.generated.J9ClassLoaderPointer slot, VoidPointer address)
protected abstract void	doClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot)
protected void	doClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot, VoidPointer address)
protected abstract void	doFinalizableObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected abstract void	doJNIGlobalReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doJNIGlobalReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doJNIWeakGlobalReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doJNIWeakGlobalReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doJVMTIObjectTagSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doJVMTIObjectTagSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected void	doMemoryAreaSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doMemorySpaceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected abstract void	doMonitorLookupCacheSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer slot)
protected void	doMonitorLookupCacheSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer objectMonitor, ObjectMonitorReferencePointer slotAddress)
protected abstract void	doMonitorReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer objectMonitor)
protected abstract void	doNonCollectableObjectSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doNonCollectableObjectSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doOwnableSynchronizerObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected abstract void	doPhantomReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doPhantomReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doRememberedSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doRememberedSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doSoftReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doSoftReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doStackSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doStackSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, WalkState walkState, VoidPointer stackLocation)
protected abstract void	doStringCacheTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doStringCacheTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doStringTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doStringTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doUnfinalizedObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected abstract void	doVMClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot)
protected void	doVMClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot, VoidPointer address)
protected abstract void	doVMThreadJNISlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doVMThreadJNISlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doVMThreadMonitorRecordSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doVMThreadMonitorRecordSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doVMThreadSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doVMThreadSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected abstract void	doWeakReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)
protected void	doWeakReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot, VoidPointer address)
protected RootScanner.Reachability	getReachability()
void	scanAllSlots()	Scan all slots which contain references into the heap.
protected void	scanClasses()
protected void	scanClassLoaders()
void	scanClearable()	Scan all clearable root set references from the VM into the heap.
protected void	scanFinalizableObjects()
protected void	scanJNIGlobalReferences()
protected void	scanJNIWeakGlobalReferences()
protected void	scanJVMTIObjectTagTables()
protected void	scanMonitorLookupCaches()
protected void	scanMonitorReferences()
protected void	scanNonCollectableObjects()
protected void	scanOwnableSynchronizerObjects()
protected void	scanPermanentClasses()
protected void	scanPhantomReferenceObjects()
protected void	scanRememberedSet()
void	scanRoots()	Scan all root set references from the VM into the heap.
protected void	scanSoftReferenceObjects()
protected void	scanStringTable()
protected void	scanThreads()
protected void	scanUnfinalizedObjects()
protected void	scanVMClassSlots()
protected void	scanWeakReferenceObjects()
void	setClassDataAsRoots(boolean classDataAsRoots)
void	setIncludeRememberedSetReferences(boolean includeRememberedSetReferences)
void	setIncludeStackFrameClassReferences(boolean includeStackFrameClassReferences)
void	setNurseryReferencesOnly(boolean nurseryReferencesOnly)
void	setNurseryReferencesPossibly(boolean nurseryReferencesPossibly)
void	setScanStackSlots(boolean scanStackSlots)
void	setStringTableAsRoot(boolean stringTableAsRoot)
void	setTrackVisibleStackFrameDepth(boolean trackVisibleStackFrameDepth)

Methods declared in class java.lang.Object

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

Constructor Details

RootScanner

protected RootScanner()
               throws CorruptDataException

Throws:

CorruptDataException

Method Details

setStringTableAsRoot

public void setStringTableAsRoot(boolean stringTableAsRoot)

setNurseryReferencesOnly

public void setNurseryReferencesOnly(boolean nurseryReferencesOnly)

setNurseryReferencesPossibly

public void setNurseryReferencesPossibly(boolean nurseryReferencesPossibly)

setIncludeRememberedSetReferences

public void setIncludeRememberedSetReferences(boolean includeRememberedSetReferences)

setIncludeStackFrameClassReferences

public void setIncludeStackFrameClassReferences(boolean includeStackFrameClassReferences)

setClassDataAsRoots

public void setClassDataAsRoots(boolean classDataAsRoots)

setTrackVisibleStackFrameDepth

public void setTrackVisibleStackFrameDepth(boolean trackVisibleStackFrameDepth)

setScanStackSlots

public void setScanStackSlots(boolean scanStackSlots)

doClassSlot

protected abstract void doClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot)

doClass

protected abstract void doClass(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer clazz)

doClassLoader

protected abstract void doClassLoader(com.ibm.j9ddr.vm29.pointer.generated.J9ClassLoaderPointer slot)

doWeakReferenceSlot

protected abstract void doWeakReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doSoftReferenceSlot

protected abstract void doSoftReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doPhantomReferenceSlot

protected abstract void doPhantomReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doFinalizableObject

protected abstract void doFinalizableObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doUnfinalizedObject

protected abstract void doUnfinalizedObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doOwnableSynchronizerObject

protected abstract void doOwnableSynchronizerObject(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doMonitorReference

protected abstract void doMonitorReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer objectMonitor)

doMonitorLookupCacheSlot

protected abstract void doMonitorLookupCacheSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer slot)

doJNIWeakGlobalReference

protected abstract void doJNIWeakGlobalReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doJNIGlobalReferenceSlot

protected abstract void doJNIGlobalReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doRememberedSlot

protected abstract void doRememberedSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doJVMTIObjectTagSlot

protected abstract void doJVMTIObjectTagSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doStringTableSlot

protected abstract void doStringTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doStringCacheTableSlot

protected abstract void doStringCacheTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doVMClassSlot

protected abstract void doVMClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot)

doVMThreadSlot

protected abstract void doVMThreadSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doVMThreadJNISlot

protected abstract void doVMThreadJNISlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doVMThreadMonitorRecordSlot

protected abstract void doVMThreadMonitorRecordSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doNonCollectableObjectSlot

protected abstract void doNonCollectableObjectSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doMemorySpaceSlot

protected abstract void doMemorySpaceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doStackSlot

protected abstract void doStackSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot)

doClassSlot

protected void doClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot,
 VoidPointer address)

doClass

protected void doClass(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer clazz,
 VoidPointer address)

doClassLoader

protected void doClassLoader(com.ibm.j9ddr.vm29.pointer.generated.J9ClassLoaderPointer slot,
 VoidPointer address)

doWeakReferenceSlot

protected void doWeakReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doSoftReferenceSlot

protected void doSoftReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doPhantomReferenceSlot

protected void doPhantomReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doMonitorLookupCacheSlot

protected void doMonitorLookupCacheSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectMonitorPointer objectMonitor,
 ObjectMonitorReferencePointer slotAddress)

doJNIWeakGlobalReference

protected void doJNIWeakGlobalReference(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doJNIGlobalReferenceSlot

protected void doJNIGlobalReferenceSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doRememberedSlot

protected void doRememberedSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doJVMTIObjectTagSlot

protected void doJVMTIObjectTagSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doStringTableSlot

protected void doStringTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doStringCacheTableSlot

protected void doStringCacheTableSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doVMClassSlot

protected void doVMClassSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer slot,
 VoidPointer address)

doVMThreadSlot

protected void doVMThreadSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doVMThreadJNISlot

protected void doVMThreadJNISlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doVMThreadMonitorRecordSlot

protected void doVMThreadMonitorRecordSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doNonCollectableObjectSlot

protected void doNonCollectableObjectSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doMemoryAreaSlot

protected void doMemoryAreaSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 VoidPointer address)

doStackSlot

protected void doStackSlot(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer slot,
 WalkState walkState,
 VoidPointer stackLocation)

scanPermanentClasses

protected void scanPermanentClasses()
                             throws CorruptDataException

Throws:

CorruptDataException

scanAllSlots

public void scanAllSlots()
                  throws CorruptDataException

Scan all slots which contain references into the heap.

Throws:

CorruptDataException

scanRoots

public void scanRoots()
               throws CorruptDataException

Scan all root set references from the VM into the heap. For all slots that are hard root references into the heap, the appropriate slot handler will be called.

Throws:

CorruptDataException

scanClearable

public void scanClearable()
                   throws CorruptDataException

Scan all clearable root set references from the VM into the heap. For all slots that are clearable root references into the heap, the appropriate slot handler will be called.

Throws:

CorruptDataException

scanJVMTIObjectTagTables

protected void scanJVMTIObjectTagTables()
                                 throws CorruptDataException

Throws:

CorruptDataException

scanNonCollectableObjects

protected void scanNonCollectableObjects()
                                  throws CorruptDataException

Throws:

CorruptDataException

scanRememberedSet

protected void scanRememberedSet()
                          throws CorruptDataException

Throws:

CorruptDataException

scanJNIWeakGlobalReferences

protected void scanJNIWeakGlobalReferences()
                                    throws CorruptDataException

Throws:

CorruptDataException

scanMonitorReferences

protected void scanMonitorReferences()
                              throws CorruptDataException

Throws:

CorruptDataException

scanUnfinalizedObjects

protected void scanUnfinalizedObjects()
                               throws CorruptDataException

Throws:

CorruptDataException

scanOwnableSynchronizerObjects

protected void scanOwnableSynchronizerObjects()
                                       throws CorruptDataException

Throws:

CorruptDataException

scanMonitorLookupCaches

protected void scanMonitorLookupCaches()
                                throws CorruptDataException

Throws:

CorruptDataException

scanPhantomReferenceObjects

protected void scanPhantomReferenceObjects()
                                    throws CorruptDataException

Throws:

CorruptDataException

scanSoftReferenceObjects

protected void scanSoftReferenceObjects()
                                 throws CorruptDataException

Throws:

CorruptDataException

scanWeakReferenceObjects

protected void scanWeakReferenceObjects()
                                 throws CorruptDataException

Throws:

CorruptDataException

scanStringTable

protected void scanStringTable()
                        throws CorruptDataException

Throws:

CorruptDataException

scanJNIGlobalReferences

protected void scanJNIGlobalReferences()
                                throws CorruptDataException

Throws:

CorruptDataException

scanFinalizableObjects

protected void scanFinalizableObjects()
                               throws CorruptDataException

Throws:

CorruptDataException

scanThreads

protected void scanThreads()
                    throws CorruptDataException

Throws:

CorruptDataException

scanClassLoaders

protected void scanClassLoaders()
                         throws CorruptDataException

Throws:

CorruptDataException

scanVMClassSlots

protected void scanVMClassSlots()
                         throws CorruptDataException

Throws:

CorruptDataException

scanClasses

protected void scanClasses()
                    throws CorruptDataException

Throws:

CorruptDataException

getReachability

protected RootScanner.Reachability getReachability()