org.mmtk.plan.poisoned

Class Poisoned

java.lang.Object

org.mmtk.plan.Plan

org.mmtk.plan.Simple

org.mmtk.plan.StopTheWorld

org.mmtk.plan.marksweep.MS

org.mmtk.plan.poisoned.Poisoned

public class Poisoned
extends MS

This class implements a poisoned collector, that is essentially a test case for read and write barriers in the VM.

Field Summary

Fields inherited from class org.mmtk.plan.marksweep.MS

MARK_SWEEP, msSpace, msTrace, SCAN_MARK

Fields inherited from class org.mmtk.plan.StopTheWorld

postSanityPhase, preSanityPhase

Fields inherited from class org.mmtk.plan.Simple

CLOSURE, collection, collectionAttempt, COMPLETE, completeClosurePhase, FINALIZABLE, finishPhase, FORWARD, FORWARD_FINALIZABLE, FORWARD_REFS, forwardPhase, INITIATE, initPhase, PHANTOM_REFS, POST_SANITY_PLACEHOLDER, PRE_SANITY_PLACEHOLDER, PREPARE, PREPARE_STACKS, prepareStacks, refTypeClosurePhase, RELEASE, rootClosurePhase, ROOTS, SANITY_BUILD_TABLE, SANITY_CHECK_TABLE, SANITY_COPY_ROOTS, SANITY_PREPARE, SANITY_RELEASE, SANITY_ROOTS, SANITY_SET_POSTGC, SANITY_SET_PREGC, sanityBuildPhase, sanityCheckPhase, SET_COLLECTION_KIND, SOFT_REFS, STACK_ROOTS, WEAK_REFS, WEAK_TRACK_REFS

Fields inherited from class org.mmtk.plan.Plan

ALLOC_CODE, ALLOC_COLD_CODE, ALLOC_DEFAULT, ALLOC_GCSPY, ALLOC_HOT_CODE, ALLOC_IMMORTAL, ALLOC_LARGE_CODE, ALLOC_LOS, ALLOC_NON_MOVING, ALLOC_NON_REFERENCE, ALLOC_PRIMITIVE_LOS, ALLOC_STACK, allocationSiteCount, ALLOCATORS, concurrentWorkers, controlCollectorContext, DEFAULT_MAX_NURSERY, DEFAULT_MIN_NURSERY, DEFAULT_SITE, defaultCollectorContext, emergencyCollection, GATHER_WRITE_BARRIER_STATS, GC_PREPARE, GC_PROPER, IMMORTAL, immortalSpace, insideHarness, internalTriggeredCollection, LARGE_CODE, largeCodeSpace, lastInternalTriggeredCollection, LOS, loSpace, MAX_NON_LOS_COPY_BYTES, MAX_NON_LOS_DEFAULT_ALLOC_BYTES, MAX_NON_LOS_NONMOVING_ALLOC_BYTES, META, metaDataSpace, NEEDS_LOG_BIT_IN_HEADER, NON_MOVING, NON_PARTICIPANT, nonMovingSpace, NOT_IN_GC, parallelWorkers, pretenureThreshold, SANITY, sanityChecker, sanitySpace, SCAN_BOOT_IMAGE, SMALL_CODE, smallCodeSpace, stacksPrepared, totalTime, USE_CODE_SPACE, userTriggeredCollection, VM_SPACE, vmSpace

Constructor Summary

Constructors

Constructor and Description
Poisoned()

Method Summary

Modifier and Type	Method and Description
Word	bootTimeWriteBarrier(Word reference) Perform any required write barrier action when installing an object reference a boot time.
static ObjectReference	depoison(Word value) DePoisons a reference value.
ObjectReference	loadObjectReference(Address slot) Load an object reference
static Word	poison(ObjectReference reference) Poisons a reference value.
void	storeObjectReference(Address slot, ObjectReference value) Store an object reference

Methods inherited from class org.mmtk.plan.marksweep.MS

collectionPhase, getPagesUsed, registerSpecializedMethods, willNeverMove

Methods inherited from class org.mmtk.plan.StopTheWorld

processOptions

Methods inherited from class org.mmtk.plan.Simple

replacePhase, replacePlaceholderPhase, switchNurseryZeroingApproach

Methods inherited from class org.mmtk.plan.Plan

availableMemory, collectionRequired, concurrentCollectionRequired, determineThreadCount, enableAllocation, enableCollection, forceFullHeapCollection, freeMemory, fullyBooted, gcInProgress, gcInProgressProper, getAllocationSite, getCollectionReserve, getPagesAvail, getPagesReserved, getSpecializedScanClass, getTotalPages, handleUserCollectionRequest, harnessBegin, harnessEnd, insertPhaseAfter, isCurrentGCNursery, isEmergencyCollection, isInitialized, isInternalTriggeredCollection, isUserTriggeredCollection, lastCollectionFullHeap, lastCollectionWasExhaustive, logPoll, notifyExit, poll, preCollectorSpawn, printDetailedTiming, printPostStats, printPreStats, printUsedPages, reservedMemory, resetCollectionTrigger, sanityExpectedRC, sanityLinearScan, setBuildTimeGCByte, setGCStatus, spawnCollectorThreads, stacksPrepared, startGCspyServer, stressTestGCRequired, totalMemory, triggerInternalCollectionRequest, usedMemory

Methods inherited from class java.lang.Object

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

Constructor Detail

Poisoned

public Poisoned()

Method Detail

bootTimeWriteBarrier

public Word bootTimeWriteBarrier(Word reference)

Description copied from class: Plan

Perform any required write barrier action when installing an object reference a boot time.

Overrides:

bootTimeWriteBarrier in class Plan

Parameters:

reference - the reference value that is to be stored

Returns:

The raw value to be stored

poison

public static Word poison(ObjectReference reference)

Poisons a reference value.

Parameters:

reference - the reference to poison

Returns:

the poisoned value

depoison

public static ObjectReference depoison(Word value)

DePoisons a reference value.

Parameters:

value - the reference to dePoison

Returns:

the dePoisoned value

storeObjectReference

public void storeObjectReference(Address slot,
                                 ObjectReference value)

Store an object reference

Overrides:

storeObjectReference in class Plan

Parameters:

slot - The location of the reference

value - The value to store

loadObjectReference

public ObjectReference loadObjectReference(Address slot)

Description copied from class: Plan

Load an object reference

Overrides:

loadObjectReference in class Plan

Parameters:

slot - The location of the reference

Returns:

the object reference loaded from slot