harpoon.Interpret.Tree
Class InterpreterOffsetMap

java.lang.Object
  harpoon.Interpret.Tree.InterpreterOffsetMap

public class InterpreterOffsetMap
extends Object

A simple OffsetMap, used by the Tree Interpreter

Version:

$Id: InterpreterOffsetMap.java,v 1.5 2004/02/08 01:58:09 cananian Exp $

Author:

Duncan Bryce <duncan@lcs.mit.edu>

Constructor Summary

InterpreterOffsetMap(ClassHierarchy ch)

InterpreterOffsetMap(ClassHierarchy ch, NameMap nm)
Class constructor

Method Summary

int	clazzPtrOffset(HClass hc) Returns the offset of the class pointer
int	componentTypeOffset(HClass hc) If hc is an array type, returns the offset of its component type's class pointer
Object	decodeLabel(Label label)
int	displaySize() Returns the size of the display information of the specified class
int	elementsOffset(HClass hc) Returns the offset of the first array element if hc is an array type, otherwise generates an assertion failure
int	fieldsOffset(HClass hc) Returns the offset of the first field in an object of the specified type
int	hashCodeOffset(HClass hc) Returns the offset of the hashcode of the specified object
int	interfaceListOffset(HClass hc) If hc is a class type, or an interface, returns the offset from the class pointer of the pointer to implemented interfaces
Label	jlClass(HClass hc)
Label	label(HClass hc) Returns the label corresponding to the specified HClass
Label	label(HField hf) Returns the label corresponding to the specified static field
Label	label(HMethod hm) Returns the label corrensponding to the specified method.
Label	label(String stringConstant) Returns the label corresponding to the specified String constant
int	lengthOffset(HClass hc) If hc is an array type, returns the offset of its length field
int	offset(HClass hc) Returns the offset from the class pointer of this class's pointer in the display
int	offset(HField hf) Returns the offset from the object reference of the specified non-static field
int	offset(HMethod hm) Returns the offset from the class pointer of the specified non-static method
int	size(HClass hc) Returns the size of the specified class
Map	stringConstantMap()
Set	stringConstants()
int	wordsize() Returns the size (in bytes) of a word in the architecture represented by this OffsetMap.

Methods inherited from class java.lang.Object

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

Constructor Detail

InterpreterOffsetMap

public InterpreterOffsetMap(ClassHierarchy ch)

InterpreterOffsetMap

public InterpreterOffsetMap(ClassHierarchy ch,
                            NameMap nm)

Class constructor

Method Detail

decodeLabel

public Object decodeLabel(Label label)

jlClass

public Label jlClass(HClass hc)

label

public Label label(HClass hc)

Returns the label corresponding to the specified HClass

label

public Label label(HField hf)

Returns the label corresponding to the specified static field

label

public Label label(HMethod hm)

Returns the label corrensponding to the specified method. This method is not necessarily static

label

public Label label(String stringConstant)

Returns the label corresponding to the specified String constant

stringConstants

public Set stringConstants()

stringConstantMap

public Map stringConstantMap()

clazzPtrOffset

public int clazzPtrOffset(HClass hc)

Returns the offset of the class pointer

componentTypeOffset

public int componentTypeOffset(HClass hc)

If hc is an array type, returns the offset of its component type's class pointer

displaySize

public int displaySize()

Returns the size of the display information of the specified class

elementsOffset

public int elementsOffset(HClass hc)

Returns the offset of the first array element if hc is an array type, otherwise generates an assertion failure

fieldsOffset

public int fieldsOffset(HClass hc)

Returns the offset of the first field in an object of the specified type

hashCodeOffset

public int hashCodeOffset(HClass hc)

Returns the offset of the hashcode of the specified object

interfaceListOffset

public int interfaceListOffset(HClass hc)

If hc is a class type, or an interface, returns the offset from the class pointer of the pointer to implemented interfaces

lengthOffset

public int lengthOffset(HClass hc)

If hc is an array type, returns the offset of its length field

offset

public int offset(HClass hc)

Returns the offset from the class pointer of this class's pointer in the display

offset

public int offset(HField hf)

Returns the offset from the object reference of the specified non-static field

offset

public int offset(HMethod hm)

Returns the offset from the class pointer of the specified non-static method

size

public int size(HClass hc)

Returns the size of the specified class

wordsize

public int wordsize()

Returns the size (in bytes) of a word in the architecture represented by this OffsetMap.