com.oracle.svm.core.heap

Class InstanceReferenceMapEncoder

java.lang.Object

com.oracle.svm.core.heap.ReferenceMapEncoder

com.oracle.svm.core.heap.InstanceReferenceMapEncoder

public class InstanceReferenceMapEncoder
extends ReferenceMapEncoder

Encodes the reference map of Java instances. Features such as derived pointers and mixing compressed/uncompressed pointers are neither needed nor supported. The implementation favors decoding speed over compactness. This is fine as there is a limited number of instance reference maps. Each reference map has the following format:

• int entryCount - the number of entries in the reference map
• entryCount entries with the following format:
  • int offset - the offset where a reference is located
  • uint referenceCount - the number of adjacent references that are located at the offset

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.svm.core.heap.ReferenceMapEncoder

ReferenceMapEncoder.Input, ReferenceMapEncoder.OffsetIterator

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAP_ENTRY_SIZE
static int	MAP_HEADER_SIZE

Fields inherited from class com.oracle.svm.core.heap.ReferenceMapEncoder

encodings, writeBuffer

Constructor Summary

Constructors

Constructor and Description
InstanceReferenceMapEncoder()

Method Summary

Modifier and Type	Method and Description
protected void	encodeAll(List<Map.Entry<ReferenceMapEncoder.Input,Long>> sortedEntries)

Methods inherited from class com.oracle.svm.core.heap.ReferenceMapEncoder

add, encodeAll, lookupEncoding

Methods inherited from class java.lang.Object

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

Field Detail

MAP_HEADER_SIZE

public static final int MAP_HEADER_SIZE

See Also:

Constant Field Values

MAP_ENTRY_SIZE

public static final int MAP_ENTRY_SIZE

See Also:

Constant Field Values

Constructor Detail

InstanceReferenceMapEncoder

public InstanceReferenceMapEncoder()

Method Detail

encodeAll

protected void encodeAll(List<Map.Entry<ReferenceMapEncoder.Input,Long>> sortedEntries)

Specified by:

encodeAll in class ReferenceMapEncoder