org.jikesrvm.mm.mminterface

Class SpecializedScanMethod

java.lang.Object

org.jikesrvm.classloader.SpecializedMethod

org.jikesrvm.mm.mminterface.SpecializedScanMethod

public final class SpecializedScanMethod
extends SpecializedMethod

A method that scan objects and is specialized to a specific MMTk TransitiveClosure type.

In general as there may not be a 1-1 mapping between objects and the specialized methods this class is responsible for performing the mapping.

Specialized methods must have a static 'invoke' method that matches the given signature and return type.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	SpecializedScanMethod.Names The atoms for the names of the specialized methods

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	ENABLED Use specialized scanning ?
private static int	FALLBACK_PATTERN Fallback to a slower path that is not specialized
private static int	MAX_SPECIALIZED_OFFSET Maximum field offset we can deal with
private static int	NULL_PATTERN Objects with no references or primitive arrays
private static int	PATTERNS The total number of patterns
private static int	REFARRAY_PATTERN Reference arrays
private static TypeReference	returnType The return type of this method: void
private static TypeReference[]	signature This method's signature: the object to be scanned and the trace to use
private static int	SPECIALIZED_PATTERNS Number of patterns we will specialize
private static Atom	specializedMethodDescriptor The generic descriptor for the specialized methods
private CompiledMethod[]	specializedMethods We keep the specialized methods for key object reference patterns here.
private static TypeReference	specializedScanMethodType Our type reference
private TypeReference[]	specializedSignature The specialized signature of the method

Fields inherited from class org.jikesrvm.classloader.SpecializedMethod

id

Constructor Summary

Constructors

Constructor and Description
SpecializedScanMethod(int id, TypeReference specializedTrace)

Method Summary

Modifier and Type	Method and Description
static void	fallback(Object object, TransitiveClosure trace)
private static int	getPattern(RVMType type)
TypeReference	getReturnType()
TypeReference[]	getSignature()
static void	invoke(int id, Object object, TransitiveClosure trace) This method performs the scanning of a given object.
static void	noReferences(Object object, TransitiveClosure trace)
static void	pattern(int pattern, Object object, TransitiveClosure trace)
static void	referenceArray(Object object, TransitiveClosure trace)
static void	scalar(Object object, TransitiveClosure trace)
static void	scalarNNNNNR(Object object, TransitiveClosure trace)
static void	scalarNNNNRN(Object object, TransitiveClosure trace)
static void	scalarNNNNRR(Object object, TransitiveClosure trace)
static void	scalarNNNRNN(Object object, TransitiveClosure trace)
static void	scalarNNNRNR(Object object, TransitiveClosure trace)
static void	scalarNNNRRN(Object object, TransitiveClosure trace)
static void	scalarNNNRRR(Object object, TransitiveClosure trace)
static void	scalarNNRNNN(Object object, TransitiveClosure trace)
static void	scalarNNRNNR(Object object, TransitiveClosure trace)
static void	scalarNNRNRN(Object object, TransitiveClosure trace)
static void	scalarNNRNRR(Object object, TransitiveClosure trace)
static void	scalarNNRRNN(Object object, TransitiveClosure trace)
static void	scalarNNRRNR(Object object, TransitiveClosure trace)
static void	scalarNNRRRN(Object object, TransitiveClosure trace)
static void	scalarNNRRRR(Object object, TransitiveClosure trace)
static void	scalarNRNNNN(Object object, TransitiveClosure trace)
static void	scalarNRNNNR(Object object, TransitiveClosure trace)
static void	scalarNRNNRN(Object object, TransitiveClosure trace)
static void	scalarNRNNRR(Object object, TransitiveClosure trace)
static void	scalarNRNRNN(Object object, TransitiveClosure trace)
static void	scalarNRNRNR(Object object, TransitiveClosure trace)
static void	scalarNRNRRN(Object object, TransitiveClosure trace)
static void	scalarNRNRRR(Object object, TransitiveClosure trace)
static void	scalarNRRNNN(Object object, TransitiveClosure trace)
static void	scalarNRRNNR(Object object, TransitiveClosure trace)
static void	scalarNRRNRN(Object object, TransitiveClosure trace)
static void	scalarNRRNRR(Object object, TransitiveClosure trace)
static void	scalarNRRRNN(Object object, TransitiveClosure trace)
static void	scalarNRRRNR(Object object, TransitiveClosure trace)
static void	scalarNRRRRN(Object object, TransitiveClosure trace)
static void	scalarNRRRRR(Object object, TransitiveClosure trace)
static void	scalarRNNNNN(Object object, TransitiveClosure trace)
static void	scalarRNNNNR(Object object, TransitiveClosure trace)
static void	scalarRNNNRN(Object object, TransitiveClosure trace)
static void	scalarRNNNRR(Object object, TransitiveClosure trace)
static void	scalarRNNRNN(Object object, TransitiveClosure trace)
static void	scalarRNNRNR(Object object, TransitiveClosure trace)
static void	scalarRNNRRN(Object object, TransitiveClosure trace)
static void	scalarRNNRRR(Object object, TransitiveClosure trace)
static void	scalarRNRNNN(Object object, TransitiveClosure trace)
static void	scalarRNRNNR(Object object, TransitiveClosure trace)
static void	scalarRNRNRN(Object object, TransitiveClosure trace)
static void	scalarRNRNRR(Object object, TransitiveClosure trace)
static void	scalarRNRRNN(Object object, TransitiveClosure trace)
static void	scalarRNRRNR(Object object, TransitiveClosure trace)
static void	scalarRNRRRN(Object object, TransitiveClosure trace)
static void	scalarRNRRRR(Object object, TransitiveClosure trace)
static void	scalarRRNNNN(Object object, TransitiveClosure trace)
static void	scalarRRNNNR(Object object, TransitiveClosure trace)
static void	scalarRRNNRN(Object object, TransitiveClosure trace)
static void	scalarRRNNRR(Object object, TransitiveClosure trace)
static void	scalarRRNRNN(Object object, TransitiveClosure trace)
static void	scalarRRNRNR(Object object, TransitiveClosure trace)
static void	scalarRRNRRN(Object object, TransitiveClosure trace)
static void	scalarRRNRRR(Object object, TransitiveClosure trace)
static void	scalarRRRNNN(Object object, TransitiveClosure trace)
static void	scalarRRRNNR(Object object, TransitiveClosure trace)
static void	scalarRRRNRN(Object object, TransitiveClosure trace)
static void	scalarRRRNRR(Object object, TransitiveClosure trace)
static void	scalarRRRRNN(Object object, TransitiveClosure trace)
static void	scalarRRRRNR(Object object, TransitiveClosure trace)
static void	scalarRRRRRN(Object object, TransitiveClosure trace)
static void	scalarRRRRRR(Object object, TransitiveClosure trace)
CodeArray	specializeMethod(RVMType type) TODO: Lazily compile specialized methods?
private Atom	templateMethodName(int pattern) Find the template method name for a given pattern.

Methods inherited from class org.jikesrvm.classloader.SpecializedMethod

compileSpecializedMethod

Methods inherited from class java.lang.Object

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

Field Detail

ENABLED

public static final boolean ENABLED

Use specialized scanning ?

See Also:

Constant Field Values

signature

private static final TypeReference[] signature

This method's signature: the object to be scanned and the trace to use

returnType

private static final TypeReference returnType

The return type of this method: void

specializedScanMethodType

private static final TypeReference specializedScanMethodType

Our type reference

NULL_PATTERN

private static final int NULL_PATTERN

Objects with no references or primitive arrays

See Also:

Constant Field Values

SPECIALIZED_PATTERNS

private static final int SPECIALIZED_PATTERNS

Number of patterns we will specialize

See Also:

Constant Field Values

REFARRAY_PATTERN

private static final int REFARRAY_PATTERN

Reference arrays

See Also:

Constant Field Values

FALLBACK_PATTERN

private static final int FALLBACK_PATTERN

Fallback to a slower path that is not specialized

See Also:

Constant Field Values

PATTERNS

private static final int PATTERNS

The total number of patterns

See Also:

Constant Field Values

MAX_SPECIALIZED_OFFSET

private static final int MAX_SPECIALIZED_OFFSET

Maximum field offset we can deal with

See Also:

Constant Field Values

specializedMethods

private final CompiledMethod[] specializedMethods

We keep the specialized methods for key object reference patterns here.

specializedSignature

private final TypeReference[] specializedSignature

The specialized signature of the method

specializedMethodDescriptor

private static final Atom specializedMethodDescriptor

The generic descriptor for the specialized methods

Constructor Detail

SpecializedScanMethod

public SpecializedScanMethod(int id,
                             TypeReference specializedTrace)

Method Detail

getPattern

private static int getPattern(RVMType type)

Parameters:

type - the type to scan

Returns:

the index for the given pattern

specializeMethod

public CodeArray specializeMethod(RVMType type)

TODO: Lazily compile specialized methods?

Specified by:

specializeMethod in class SpecializedMethod

Parameters:

type - the type whose specialzed method is to be returned

Returns:

the specialized method for the given type.

getSignature

public TypeReference[] getSignature()

Specified by:

getSignature in class SpecializedMethod

Returns:

the method signature of the specialized method's invoke.

getReturnType

public TypeReference getReturnType()

Specified by:

getReturnType in class SpecializedMethod

Returns:

the return type of the specialized method's invoke

invoke

public static void invoke(int id,
                          Object object,
                          TransitiveClosure trace)

This method performs the scanning of a given object.

This is the method that (may) be hijacked by the compiler to call the specialized method.

It is safe for a compiler to ignore the potential gains and just use this method directly.

Parameters:

id - The specialized method id

object - The object to scan

trace - The trace to scan

fallback

public static void fallback(Object object,
                            TransitiveClosure trace)

scalar

public static void scalar(Object object,
                          TransitiveClosure trace)

referenceArray

public static void referenceArray(Object object,
                                  TransitiveClosure trace)

noReferences

public static void noReferences(Object object,
                                TransitiveClosure trace)

pattern

public static void pattern(int pattern,
                           Object object,
                           TransitiveClosure trace)

templateMethodName

private Atom templateMethodName(int pattern)

Find the template method name for a given pattern.

Parameters:

pattern - The pattern to look for

Returns:

The method name that will be used.

scalarRNNNNN

public static void scalarRNNNNN(Object object,
                                TransitiveClosure trace)

scalarNRNNNN

public static void scalarNRNNNN(Object object,
                                TransitiveClosure trace)

scalarRRNNNN

public static void scalarRRNNNN(Object object,
                                TransitiveClosure trace)

scalarNNRNNN

public static void scalarNNRNNN(Object object,
                                TransitiveClosure trace)

scalarRNRNNN

public static void scalarRNRNNN(Object object,
                                TransitiveClosure trace)

scalarNRRNNN

public static void scalarNRRNNN(Object object,
                                TransitiveClosure trace)

scalarRRRNNN

public static void scalarRRRNNN(Object object,
                                TransitiveClosure trace)

scalarNNNRNN

public static void scalarNNNRNN(Object object,
                                TransitiveClosure trace)

scalarRNNRNN

public static void scalarRNNRNN(Object object,
                                TransitiveClosure trace)

scalarNRNRNN

public static void scalarNRNRNN(Object object,
                                TransitiveClosure trace)

scalarRRNRNN

public static void scalarRRNRNN(Object object,
                                TransitiveClosure trace)

scalarNNRRNN

public static void scalarNNRRNN(Object object,
                                TransitiveClosure trace)

scalarRNRRNN

public static void scalarRNRRNN(Object object,
                                TransitiveClosure trace)

scalarNRRRNN

public static void scalarNRRRNN(Object object,
                                TransitiveClosure trace)

scalarRRRRNN

public static void scalarRRRRNN(Object object,
                                TransitiveClosure trace)

scalarNNNNRN

public static void scalarNNNNRN(Object object,
                                TransitiveClosure trace)

scalarRNNNRN

public static void scalarRNNNRN(Object object,
                                TransitiveClosure trace)

scalarNRNNRN

public static void scalarNRNNRN(Object object,
                                TransitiveClosure trace)

scalarRRNNRN

public static void scalarRRNNRN(Object object,
                                TransitiveClosure trace)

scalarNNRNRN

public static void scalarNNRNRN(Object object,
                                TransitiveClosure trace)

scalarRNRNRN

public static void scalarRNRNRN(Object object,
                                TransitiveClosure trace)

scalarNRRNRN

public static void scalarNRRNRN(Object object,
                                TransitiveClosure trace)

scalarRRRNRN

public static void scalarRRRNRN(Object object,
                                TransitiveClosure trace)

scalarNNNRRN

public static void scalarNNNRRN(Object object,
                                TransitiveClosure trace)

scalarRNNRRN

public static void scalarRNNRRN(Object object,
                                TransitiveClosure trace)

scalarNRNRRN

public static void scalarNRNRRN(Object object,
                                TransitiveClosure trace)

scalarRRNRRN

public static void scalarRRNRRN(Object object,
                                TransitiveClosure trace)

scalarNNRRRN

public static void scalarNNRRRN(Object object,
                                TransitiveClosure trace)

scalarRNRRRN

public static void scalarRNRRRN(Object object,
                                TransitiveClosure trace)

scalarNRRRRN

public static void scalarNRRRRN(Object object,
                                TransitiveClosure trace)

scalarRRRRRN

public static void scalarRRRRRN(Object object,
                                TransitiveClosure trace)

scalarNNNNNR

public static void scalarNNNNNR(Object object,
                                TransitiveClosure trace)

scalarRNNNNR

public static void scalarRNNNNR(Object object,
                                TransitiveClosure trace)

scalarNRNNNR

public static void scalarNRNNNR(Object object,
                                TransitiveClosure trace)

scalarRRNNNR

public static void scalarRRNNNR(Object object,
                                TransitiveClosure trace)

scalarNNRNNR

public static void scalarNNRNNR(Object object,
                                TransitiveClosure trace)

scalarRNRNNR

public static void scalarRNRNNR(Object object,
                                TransitiveClosure trace)

scalarNRRNNR

public static void scalarNRRNNR(Object object,
                                TransitiveClosure trace)

scalarRRRNNR

public static void scalarRRRNNR(Object object,
                                TransitiveClosure trace)

scalarNNNRNR

public static void scalarNNNRNR(Object object,
                                TransitiveClosure trace)

scalarRNNRNR

public static void scalarRNNRNR(Object object,
                                TransitiveClosure trace)

scalarNRNRNR

public static void scalarNRNRNR(Object object,
                                TransitiveClosure trace)

scalarRRNRNR

public static void scalarRRNRNR(Object object,
                                TransitiveClosure trace)

scalarNNRRNR

public static void scalarNNRRNR(Object object,
                                TransitiveClosure trace)

scalarRNRRNR

public static void scalarRNRRNR(Object object,
                                TransitiveClosure trace)

scalarNRRRNR

public static void scalarNRRRNR(Object object,
                                TransitiveClosure trace)

scalarRRRRNR

public static void scalarRRRRNR(Object object,
                                TransitiveClosure trace)

scalarNNNNRR

public static void scalarNNNNRR(Object object,
                                TransitiveClosure trace)

scalarRNNNRR

public static void scalarRNNNRR(Object object,
                                TransitiveClosure trace)

scalarNRNNRR

public static void scalarNRNNRR(Object object,
                                TransitiveClosure trace)

scalarRRNNRR

public static void scalarRRNNRR(Object object,
                                TransitiveClosure trace)

scalarNNRNRR

public static void scalarNNRNRR(Object object,
                                TransitiveClosure trace)

scalarRNRNRR

public static void scalarRNRNRR(Object object,
                                TransitiveClosure trace)

scalarNRRNRR

public static void scalarNRRNRR(Object object,
                                TransitiveClosure trace)

scalarRRRNRR

public static void scalarRRRNRR(Object object,
                                TransitiveClosure trace)

scalarNNNRRR

public static void scalarNNNRRR(Object object,
                                TransitiveClosure trace)

scalarRNNRRR

public static void scalarRNNRRR(Object object,
                                TransitiveClosure trace)

scalarNRNRRR

public static void scalarNRNRRR(Object object,
                                TransitiveClosure trace)

scalarRRNRRR

public static void scalarRRNRRR(Object object,
                                TransitiveClosure trace)

scalarNNRRRR

public static void scalarNNRRRR(Object object,
                                TransitiveClosure trace)

scalarRNRRRR

public static void scalarRNRRRR(Object object,
                                TransitiveClosure trace)

scalarNRRRRR

public static void scalarNRRRRR(Object object,
                                TransitiveClosure trace)

scalarRRRRRR

public static void scalarRRRRRR(Object object,
                                TransitiveClosure trace)