com.oracle.svm.core.heap

Class Heap

java.lang.Object

com.oracle.svm.core.heap.Heap

Direct Known Subclasses:

HeapImpl

public abstract class Heap
extends Object

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Heap()

Method Summary

Modifier and Type	Method and Description
abstract PinnedAllocator	createPinnedAllocator() Create a PinnedAllocator.
abstract void	disableAllocation(org.graalvm.nativeimage.IsolateThread vmThread)
abstract void	endSafepoint() Reset the heap to the normal execution state.
abstract List<Class<?>>	getClassList() Return a list of all the classes in the heap.
abstract GC	getGC()
abstract org.graalvm.compiler.nodes.spi.GCProvider	getGCProvider() Returns a suitable GCProvider for the garbage collector that is used for this heap.
static Heap	getHeap() Retuns the singleton Heap implementation that is created during image generation.
abstract MemoryMXBean	getMemoryMXBean() Get the MemoryMXBean for this heap.
abstract ObjectHeader	getObjectHeader() Get the ObjectHeader implementation that this Heap uses.
abstract boolean	isAllocationDisallowed() Allocation is disallowed if ...
abstract void	prepareForSafepoint() Prepare the heap for a safepoint.
abstract void	resumeAllocation()
abstract void	suspendAllocation()
abstract void	tearDown() Tear down the heap, return all allocated virtual memory chunks to VirtualMemoryProvider.
abstract void	walkObjects(ObjectVisitor visitor) Walk all the Objects in the Heap, passing each to the visitor.

Methods inherited from class java.lang.Object

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

Constructor Detail

Heap

protected Heap()

Method Detail

getHeap

public static Heap getHeap()

Retuns the singleton Heap implementation that is created during image generation.

suspendAllocation

public abstract void suspendAllocation()

resumeAllocation

public abstract void resumeAllocation()

disableAllocation

public abstract void disableAllocation(org.graalvm.nativeimage.IsolateThread vmThread)

isAllocationDisallowed

public abstract boolean isAllocationDisallowed()

Allocation is disallowed if ...

createPinnedAllocator

public abstract PinnedAllocator createPinnedAllocator()

Create a PinnedAllocator.

getGC

public abstract GC getGC()

walkObjects

public abstract void walkObjects(ObjectVisitor visitor)

Walk all the Objects in the Heap, passing each to the visitor.

getClassList

public abstract List<Class<?>> getClassList()

Return a list of all the classes in the heap.

getObjectHeader

public abstract ObjectHeader getObjectHeader()

Get the ObjectHeader implementation that this Heap uses. TODO: This is used during native image generation to put appropriate headers on Objects in the native image heap. Is there any reason to expose the whole ObjectHeader interface, since only setBootImageOnLong(0L) is used then, to get the native image object header bits? TODO: Would an "Unsigned getBootImageObjectHeaderBits()" method be sufficient?

getMemoryMXBean

public abstract MemoryMXBean getMemoryMXBean()

Get the MemoryMXBean for this heap.

tearDown

public abstract void tearDown()

Tear down the heap, return all allocated virtual memory chunks to VirtualMemoryProvider.

prepareForSafepoint

public abstract void prepareForSafepoint()

Prepare the heap for a safepoint.

endSafepoint

public abstract void endSafepoint()

Reset the heap to the normal execution state.

getGCProvider

public abstract org.graalvm.compiler.nodes.spi.GCProvider getGCProvider()

Returns a suitable GCProvider for the garbage collector that is used for this heap.