com.oracle.svm.core.heap

Interface ReferenceAccess

All Known Implementing Classes:

ReferenceAccessImpl

public interface ReferenceAccess

Means for accessing object references, explicitly distinguishing between compressed and uncompressed references.

Method Summary

Modifier and Type	Method and Description
org.graalvm.word.UnsignedWord	getCompressedRepresentation(Object obj) Return the compressed representation of an object reference.
org.graalvm.compiler.core.common.CompressEncoding	getCompressEncoding() Returns the default compression encoding.
boolean	haveCompressedReferences() Returns true iff compressed references are available.
org.graalvm.compiler.word.Word	readObjectAsUntrackedPointer(org.graalvm.word.Pointer p, boolean compressed) Read the absolute address of the object referenced by the object reference at address p and return it as a word which is not tracked by garbage collection.
Object	readObjectAt(org.graalvm.word.Pointer p, boolean compressed) Read the object reference at address p and return it.
static ReferenceAccess	singleton()
Object	uncompressReference(org.graalvm.word.UnsignedWord ref) Get an object reference from its compressed representation.
void	writeObjectAt(org.graalvm.word.Pointer p, Object value, boolean compressed) Write the location of object value to the object reference at address p.
void	writeObjectBarrieredAt(Object object, org.graalvm.word.UnsignedWord offsetInObject, Object value, boolean compressed)

Method Detail

singleton

static ReferenceAccess singleton()

readObjectAsUntrackedPointer

org.graalvm.compiler.word.Word readObjectAsUntrackedPointer(org.graalvm.word.Pointer p,
                                                            boolean compressed)

Read the absolute address of the object referenced by the object reference at address p and return it as a word which is not tracked by garbage collection.

readObjectAt

Object readObjectAt(org.graalvm.word.Pointer p,
                    boolean compressed)

Read the object reference at address p and return it.

writeObjectAt

void writeObjectAt(org.graalvm.word.Pointer p,
                   Object value,
                   boolean compressed)

Write the location of object value to the object reference at address p.

writeObjectBarrieredAt

void writeObjectBarrieredAt(Object object,
                            org.graalvm.word.UnsignedWord offsetInObject,
                            Object value,
                            boolean compressed)

getCompressedRepresentation

org.graalvm.word.UnsignedWord getCompressedRepresentation(Object obj)

Return the compressed representation of an object reference.

uncompressReference

Object uncompressReference(org.graalvm.word.UnsignedWord ref)

Get an object reference from its compressed representation.

haveCompressedReferences

boolean haveCompressedReferences()

Returns true iff compressed references are available.

getCompressEncoding

org.graalvm.compiler.core.common.CompressEncoding getCompressEncoding()

Returns the default compression encoding.