Package com.oracle.svm.core.genscavenge

Interface Summary

Interface	Description
AlignedHeapChunk.AlignedHeader	Additional fields beyond what is in HeapChunk.Header.
CardTable.Visitor	An interface for visitors to a card remembered set table.
GreyToBlackObjRefVisitor.Counters	A set of counters.
HeapChunk.Header<T extends HeapChunk.Header<T>>
HeapPolicy.HintGCPolicy
HeapVerifier	Verification of the heap.
Space.Verifier
ThreadLocalAllocation.Descriptor
UnalignedHeapChunk.UnalignedHeader	Additional fields beyond what is in HeapChunk.Header.

Class Summary

Class	Description
AlignedHeapChunk	An AlignedHeapChunk can hold many Objects.
AlignedHeapChunk.MemoryWalkerAccessImpl	Methods for a MemoryWalker to access an aligned heap chunk.
AlignedHeapChunk.TestingBackDoor	Expose some methods that should be protected.
CardTable	A card remembered set table is a remembered set that summarizes pointer stores into a region.
CardTable.ReferenceToYoungObjectReferenceVisitor	Visit an object reference and return false if it is a reference to the young space.
CardTable.ReferenceToYoungObjectVisitor
CardTable.TestingBackDoor	For testing and debugging.
CollectionPolicy	A collection policy to decide when to collect incrementally or completely.
CollectionPolicy.BySpaceAndTime	A collection policy that delays complete collections until the heap has at least `-Xms` space in it, and then tries to balance time in incremental and complete collections.
CollectionPolicy.ByTime	A collection policy that attempts to balance the time spent in incremental collections and the time spent in full collections.
CollectionPolicy.NeverCollect	For debugging: A collection policy that never collects.
CollectionPolicy.OnlyCompletely	For debugging: A collection policy that only collects completely.
CollectionPolicy.OnlyIncrementally	For debugging: A collection policy that only collects incrementally.
CollectionPolicy.Options
DiscoverableReferenceProcessing
FirstObjectTable	A "first object table" to tell me the start of the first object that crosses onto a card remembered set memory region.
FirstObjectTable.TestingBackDoor	Make some protected things public, for testing.
GCImpl
GCImpl.Accounting	Accounting for this collector.
GCImpl.CollectionVMOperation
GCImpl.RememberedSetConstructor	A ObjectVisitor to build the remembered set for a chunk.
GCImpl.Timer	A class for the timers kept by the collector.
Generation	A Generation is a collection of one or more Spaces.
GreyObjectsWalker	Apply an ObjectVisitor to all the new Object in a Space since a snapshot.
GreyToBlackObjectVisitor	Run an ObjectReferenceVisitor (GreyToBlackObjRefVisitor) over any interior object references in the Object, turning this Object from grey to black.
GreyToBlackObjRefVisitor	This visitor is handed *Pointers to Object references* and if necessary it promotes the referenced Object and replaces the Object reference with a forwarding pointer.
GreyToBlackObjRefVisitor.NoopCounters
GreyToBlackObjRefVisitor.Options
GreyToBlackObjRefVisitor.RealCounters
HeapChunk	HeapChunk is a superclass for the memory that makes up the Heap.
HeapChunk.MemoryWalkerAccessImpl<T extends HeapChunk.Header<?>>	Shared methods for a MemoryWalker to access a heap chunk.
HeapImpl	An implementation of a card remembered set generational heap.
HeapOptions
HeapPolicy	HeapPolicy contains different GC policies including size of memory chunk, large array threshold, limit of unused chunk, maximum heap size and verbose for printing debugging information during GC.
HeapPolicy.AlwaysCollectCompletely
HeapPolicy.CollectOnAllocationPolicy	A policy for when to cause automatic collections on allocation.
HeapPolicy.CollectOnAllocationPolicy.Always	A policy that always causes collection on allocation.
HeapPolicy.CollectOnAllocationPolicy.Never	A policy that never causes collection on allocation.
HeapPolicy.CollectOnAllocationPolicy.Sometimes	A policy that causes collections if enough young generation allocation has happened.
HeapPolicy.ScepticallyCollect	Collect if bytes allocated since last collection exceed the threshold defined by HeapPolicy.ScepticallyCollect.collectScepticallyThreshold().
HeapPolicy.TestingBackDoor	Methods exposed for testing.
HeapPolicyOptions
HeapVerifier.MemoryChecker
HeapVerifierImpl	Verification of the heap.
HeapVerifierImpl.VerifyVMOperation	A VMOperation that verifies the heap.
Latch	An AutoCloseable boolean.
MemoryWalkerImpl
MemoryWalkerImpl.MemoryWalkerVMOperation	A VMOperation that walks memory.
ObjectHeaderImpl	The low-order 3 bits of an ObjectHeader are used to mark things about this object instance.
OldGeneration	An OldGeneration has three Spaces, fromSpace for existing objects, toSpace for newly-allocated or promoted objects, and pinnedSpace for pinned objects. An OldGeneration also keeps a list of PinnedAllocators.
PathExhibitor
PathExhibitor.BootImageHeapElement	A path element for a reference from the native image heap.
PathExhibitor.CyclicElement	A path element for a cyclic reference.
PathExhibitor.FrameVisitor	A reusable StackFrameVisitor.
PathExhibitor.HeapElement	A path element for a reference from a Object field.
PathExhibitor.InterferenceElement	A path element for when I find a PathElement.
PathExhibitor.LeafElement	A path element for a leaf.
PathExhibitor.PathElement
PathExhibitor.StackElement	A path element for a reference from a stack frame.
PathExhibitor.TestingBackDoor	For debugging.
PinnedAllocatorImpl	This class holds the instance data for a PinnedAllocator.
PinnedObjectImpl	Holder for a pinned object, such that the object doesn't move until the pin is removed.
Space	A Space is a collection of HeapChunks.
Space.Accounting	Keep whatever accounting is required.
StackVerifier	Walk a thread stack verifying the Objects pointed to from the frames.
ThreadLocalAllocation	Bump-pointer allocation from thread-local top and end Pointers.
ThreadLocalAllocation.TestingBackdoor	Expose some private methods for white-box testing.
UnalignedHeapChunk	An UnalignedHeapChunk holds exactly one Object.
UnalignedHeapChunk.TestingBackDoor	Expose some methods that should be protected.
YoungGeneration	A Young Generation has one space, for ordinary objects.

Enum Summary

Enum	Description
HeapVerifier.Occasion
HeapVerifierImpl.ChunkLimit

Exception Summary

Exception	Description
GCImpl.UnpinnedObjectReferenceWalkerException

Error Summary

Error	Description
HeapVerifier.HeapVerificationError	Throw one of these to signal that verification has failed.