byucc.jhdl.synth.classparse
Class AttributeCode

java.lang.Object
  byucc.jhdl.synth.classparse.ClassFileParser
      byucc.jhdl.synth.classparse.AttributeInfo
          byucc.jhdl.synth.classparse.AttributeCode

public class AttributeCode

extends AttributeInfo

Field Summary

Fields inherited from class byucc.jhdl.synth.classparse.AttributeInfo

attribute_name

Fields inherited from class byucc.jhdl.synth.classparse.ClassFileParser

CONSTANT_Class, CONSTANT_Double, CONSTANT_Fieldref, CONSTANT_Float, CONSTANT_Integer, CONSTANT_InterfaceMethodref, CONSTANT_Long, CONSTANT_Methodref, CONSTANT_NameAndType, CONSTANT_String, CONSTANT_Utf8

Constructor Summary

AttributeCode(MethodInfo parent, int name_index)

Method Summary

void	execute(VirtualMachine vm)
BasicBlock[]	findBasicBlocks(VirtualMachine vm)
OpCode[]	getCode()
OpCode	getInstructionAtIndex(int index)
OpCode	getInstructionByPC(int pc)
int	getInstructionIndexByPC(int pc) Get the index of the instruction that has the given PC value.
java.lang.String	getLocalVariableName(int pc, int index)
AttributeLocalVariableTable	getLocalVariables()
java.lang.String	getLocalVariableType(int index)
int	length()
void	resolveTargets()
void	toClass(ClassFileWriter output) Spit out the contents of this AttributeCode to the given ClassFileWriter.
java.lang.StringBuffer	toJasmin(java.lang.StringBuffer result)
java.lang.String	toString()

Methods inherited from class byucc.jhdl.synth.classparse.ClassFileParser

getClassFile, getConstantPool, parseAttributeInfo, parseAttributes, parseConstantPool, parseCPInfo, parseDouble, parseFieldInfo, parseFields, parseFloat, parseLong, parseMethodInfo, parseMethods, parseOpCode, parseSuccess, parseUTF, s2, toJasmin, u1, u2, u4

Methods inherited from class java.lang.Object

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

Constructor Detail

AttributeCode

public AttributeCode(MethodInfo parent,
                     int name_index)

Method Detail

toClass

public void toClass(ClassFileWriter output)

Spit out the contents of this AttributeCode to the given ClassFileWriter. This method is basically the opposite of the constructor. The constructor reads in a AttributeCode from a DataInputStream and this method spits the AttributeCode out to a DataOutputStream, (which is in the ClassFileWriter).

Overrides:

toClass in class AttributeInfo

Parameters:

output - a ClassFileWriter constructed with a DataOutputStram to contain the output class file.

length

public int length()

Overrides:

length in class ClassFileParser

resolveTargets

public void resolveTargets()

getInstructionByPC

public OpCode getInstructionByPC(int pc)

getInstructionIndexByPC

public int getInstructionIndexByPC(int pc)

Get the index of the instruction that has the given PC value. If the given PC value is beyond the end of the code in this method, then return the index of the last valid OPCode within this method. The reason we do this is that the values of the indices from the LocalVariableTable sometimes extend beyond the last PC in the method. Here's the relevant section of the documentation of the LocalVariableTable: start_pc, length The given local variable must have a value at indices into the code array in the interval [start_pc, start_pc+length], that is, between start_pc and start_pc+length inclusive. The value of start_pc must be a valid index into the code array of this Code attribute and must be the index of the opcode of an instruction. Either the value of start_pc+length must be a valid index into the code array of this Code attribute and be the index of the opcode of an instruction, or it must be the first index beyond the end of that code array. (Java Language Specification)

getInstructionAtIndex

public OpCode getInstructionAtIndex(int index)

toString

public java.lang.String toString()

toJasmin

public java.lang.StringBuffer toJasmin(java.lang.StringBuffer result)

Overrides:

toJasmin in class AttributeInfo

execute

public void execute(VirtualMachine vm)

findBasicBlocks

public BasicBlock[] findBasicBlocks(VirtualMachine vm)

getLocalVariables

public AttributeLocalVariableTable getLocalVariables()

getLocalVariableName

public java.lang.String getLocalVariableName(int pc,
                                             int index)

getCode

public OpCode[] getCode()

getLocalVariableType

public java.lang.String getLocalVariableType(int index)