com.oracle.svm.core.genscavenge

Class ImageHeapInfo

java.lang.Object

com.oracle.svm.core.genscavenge.ImageHeapInfo

public final class ImageHeapInfo
extends Object

Information on the multiple partitions that make up the image heap, which don't necessarily form a contiguous block of memory (there can be holes in between), and their boundaries.

Field Summary

Fields

Modifier and Type	Field and Description
int	dynamicHubCount
Object	firstObject
Object	firstReadOnlyHugeObject
Object	firstReadOnlyPrimitiveObject
Object	firstReadOnlyReferenceObject
Object	firstReadOnlyRelocatableObject
Object	firstWritableHugeObject
Object	firstWritablePrimitiveObject
Object	firstWritableReferenceObject
Object	lastObject
Object	lastReadOnlyHugeObject
Object	lastReadOnlyPrimitiveObject
Object	lastReadOnlyReferenceObject
Object	lastReadOnlyRelocatableObject
Object	lastWritableHugeObject
Object	lastWritablePrimitiveObject
Object	lastWritableReferenceObject
static long	NO_CHUNK Indicates no chunk with ImageHeapInfo.initialize(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, long, long, int) chunk offset parameters.
long	offsetOfFirstAlignedChunkWithRememberedSet
long	offsetOfFirstUnalignedChunkWithRememberedSet

Constructor Summary

Constructors

Constructor and Description
ImageHeapInfo()

Method Summary

Modifier and Type	Method and Description
void	initialize(Object firstReadOnlyPrimitiveObject, Object lastReadOnlyPrimitiveObject, Object firstReadOnlyReferenceObject, Object lastReadOnlyReferenceObject, Object firstReadOnlyRelocatableObject, Object lastReadOnlyRelocatableObject, Object firstWritablePrimitiveObject, Object lastWritablePrimitiveObject, Object firstWritableReferenceObject, Object lastWritableReferenceObject, Object firstWritableHugeObject, Object lastWritableHugeObject, Object firstReadOnlyHugeObject, Object lastReadOnlyHugeObject, long offsetOfFirstAlignedChunkWithRememberedSet, long offsetOfFirstUnalignedChunkWithRememberedSet, int dynamicHubCount)
boolean	isInImageHeap(org.graalvm.word.Pointer objectPointer) This method only returns the correct result for pointers that point to the the start of an object.
boolean	isInImageHeapSlow(org.graalvm.word.Pointer objectPointer)
boolean	isInReadOnlyHugePartition(org.graalvm.word.Pointer ptr)
boolean	isInReadOnlyPrimitivePartition(org.graalvm.word.Pointer ptr)
boolean	isInReadOnlyReferencePartition(org.graalvm.word.Pointer ptr)
boolean	isInReadOnlyRelocatablePartition(org.graalvm.word.Pointer ptr)
boolean	isInWritableHugePartition(org.graalvm.word.Pointer ptr)
boolean	isInWritablePrimitivePartition(org.graalvm.word.Pointer ptr)
boolean	isInWritableReferencePartition(org.graalvm.word.Pointer ptr)

Methods inherited from class java.lang.Object

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

Field Detail

NO_CHUNK

public static final long NO_CHUNK

Indicates no chunk with ImageHeapInfo.initialize(java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, java.lang.Object, long, long, int) chunk offset parameters.

See Also:

Constant Field Values

firstReadOnlyPrimitiveObject

public Object firstReadOnlyPrimitiveObject

lastReadOnlyPrimitiveObject

public Object lastReadOnlyPrimitiveObject

firstReadOnlyReferenceObject

public Object firstReadOnlyReferenceObject

lastReadOnlyReferenceObject

public Object lastReadOnlyReferenceObject

firstReadOnlyRelocatableObject

public Object firstReadOnlyRelocatableObject

lastReadOnlyRelocatableObject

public Object lastReadOnlyRelocatableObject

firstWritablePrimitiveObject

public Object firstWritablePrimitiveObject

lastWritablePrimitiveObject

public Object lastWritablePrimitiveObject

firstWritableReferenceObject

public Object firstWritableReferenceObject

lastWritableReferenceObject

public Object lastWritableReferenceObject

firstWritableHugeObject

public Object firstWritableHugeObject

lastWritableHugeObject

public Object lastWritableHugeObject

firstReadOnlyHugeObject

public Object firstReadOnlyHugeObject

lastReadOnlyHugeObject

public Object lastReadOnlyHugeObject

firstObject

public Object firstObject

lastObject

public Object lastObject

offsetOfFirstAlignedChunkWithRememberedSet

public long offsetOfFirstAlignedChunkWithRememberedSet

offsetOfFirstUnalignedChunkWithRememberedSet

public long offsetOfFirstUnalignedChunkWithRememberedSet

dynamicHubCount

public int dynamicHubCount

Constructor Detail

ImageHeapInfo

public ImageHeapInfo()

Method Detail

initialize

public void initialize(Object firstReadOnlyPrimitiveObject,
                       Object lastReadOnlyPrimitiveObject,
                       Object firstReadOnlyReferenceObject,
                       Object lastReadOnlyReferenceObject,
                       Object firstReadOnlyRelocatableObject,
                       Object lastReadOnlyRelocatableObject,
                       Object firstWritablePrimitiveObject,
                       Object lastWritablePrimitiveObject,
                       Object firstWritableReferenceObject,
                       Object lastWritableReferenceObject,
                       Object firstWritableHugeObject,
                       Object lastWritableHugeObject,
                       Object firstReadOnlyHugeObject,
                       Object lastReadOnlyHugeObject,
                       long offsetOfFirstAlignedChunkWithRememberedSet,
                       long offsetOfFirstUnalignedChunkWithRememberedSet,
                       int dynamicHubCount)

isInReadOnlyPrimitivePartition

public boolean isInReadOnlyPrimitivePartition(org.graalvm.word.Pointer ptr)

isInReadOnlyReferencePartition

public boolean isInReadOnlyReferencePartition(org.graalvm.word.Pointer ptr)

isInReadOnlyRelocatablePartition

public boolean isInReadOnlyRelocatablePartition(org.graalvm.word.Pointer ptr)

isInWritablePrimitivePartition

public boolean isInWritablePrimitivePartition(org.graalvm.word.Pointer ptr)

isInWritableReferencePartition

public boolean isInWritableReferencePartition(org.graalvm.word.Pointer ptr)

isInWritableHugePartition

public boolean isInWritableHugePartition(org.graalvm.word.Pointer ptr)

isInReadOnlyHugePartition

public boolean isInReadOnlyHugePartition(org.graalvm.word.Pointer ptr)

isInImageHeap

public boolean isInImageHeap(org.graalvm.word.Pointer objectPointer)

This method only returns the correct result for pointers that point to the the start of an object. This is sufficient for all our current use cases. This code must be as fast as possible at the GC uses it for every visited reference.

isInImageHeapSlow

public boolean isInImageHeapSlow(org.graalvm.word.Pointer objectPointer)