com.mebigfatguy.fbcontrib.utils
Class RegisterUtils

java.lang.Object
  extended by com.mebigfatguy.fbcontrib.utils.RegisterUtils

public class RegisterUtils
extends java.lang.Object

an auxillary class for managing and manipulating registers


Method Summary
static int getALoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen)
          returns the register used to load a reference
static int getAStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen)
          returns the register used to store a reference
static int getLoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen)
          returns the register used in a load operation
static int getLocalVariableEndRange(org.apache.bcel.classfile.LocalVariableTable lvt, int reg, int curPC)
          returns the end pc of the visible range of this register at this pc
static int[] getParameterRegisters(org.apache.bcel.classfile.Method obj)
          gets the set of registers used for parameters
static int getStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen)
          returns the register used in a store operation
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

getAStoreReg

public static int getAStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                               int seen)
returns the register used to store a reference

Parameters:
dbc - the dismantle byte code parsing the class
seen - the opcode of the store
Returns:
the register stored into

getALoadReg

public static int getALoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                              int seen)
returns the register used to load a reference

Parameters:
dbc - the dismantle byte code parsing the class
seen - the opcode of the load
Returns:
the register loaded from

getStoreReg

public static int getStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                              int seen)
returns the register used in a store operation

Parameters:
dbc - the dismantle byte code parsing the class
seen - the opcode of the store
Returns:
the register stored into

getLoadReg

public static int getLoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                             int seen)
returns the register used in a load operation

Parameters:
dbc - the dismantle byte code parsing the class
seen - the opcode of the load
Returns:
the register stored into

getLocalVariableEndRange

public static int getLocalVariableEndRange(org.apache.bcel.classfile.LocalVariableTable lvt,
                                           int reg,
                                           int curPC)
returns the end pc of the visible range of this register at this pc

Parameters:
lvt - the local variable table for this method
reg - the register to examine
curPC - the pc of the current instruction
Returns:
the endpc

getParameterRegisters

public static int[] getParameterRegisters(org.apache.bcel.classfile.Method obj)
gets the set of registers used for parameters

Parameters:
obj - the context object for the method to find the parameter registers of


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