net.sf.transjvm
Class InstructionStream

java.lang.Object
  net.sf.transjvm.InstructionStream

public class InstructionStream
extends java.lang.Object

Utility stream for writing instruction codes.

Author:

Mark Shannon

Constructor Summary

InstructionStream(ByteStream stream, ConstantPool pool, Frame frame)

Method Summary

void	_instanceof(TypeID id)
void	_new(TypeID id)
void	add(int incr)
void	addLocalVariableName(int start, int length, java.lang.String name, TypeID type, int index)
int	address()
void	anewarray(TypeID id)
void	athrow()
void	bconst(boolean value)
void	beginSub()
void	branchBackwards(int opcode, int address) Inserts a backwards branch.
int	branchForwards(int opcode) Inserts a forward branch
void	byteArg(int opcode, int arg)
void	checkcast(TypeID id)
void	close()
void	dconst(double value)
void	dup_x1()
void	dup_x2()
void	dup()
void	dup2_x1()
void	dup2_x2()
void	dup2()
void	endSub()
void	fconst(float f)
void	getfield(FieldID id)
Attribute	getLineNumberTable()
Attribute	getLocalVariableTable()
void	getstatic(FieldID id)
void	handleException(int start, int end, TypeID type, int target)
void	iconst(int value)
void	intArg(int opcode, int arg)
void	jumpBackwards(int address) Inserts a backwards jump.
int	jumpForwards() Inserts a forward jump.
void	lconst(long value)
void	line(int line) Marks start of new source code line, for debugging.
int	maxStack()
void	newarray(TypeID component)
void	patch(int address) Patches a forward jump or branch, to branch to the current address.
void	pop2()
void	putfield(FieldID id)
void	putstatic(FieldID id)
void	sconst(java.lang.String s)
void	shortArg(int opcode, int arg)
void	stackDepth(int depth) Ensures that the JVM will allocate stack space of no less than depth.
void	write(int value)
void	writeInt(int value)
void	writeRef(MemberID id)
void	writeShortAt(int address, int value)

Methods inherited from class java.lang.Object

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

Constructor Detail

InstructionStream

public InstructionStream(ByteStream stream,
                         ConstantPool pool,
                         Frame frame)

Method Detail

address

public int address()

writeInt

public void writeInt(int value)

write

public void write(int value)

getLineNumberTable

public Attribute getLineNumberTable()

close

public void close()

maxStack

public int maxStack()

stackDepth

public void stackDepth(int depth)

Ensures that the JVM will allocate stack space of no less than depth.

line

public void line(int line)

Marks start of new source code line, for debugging.

byteArg

public void byteArg(int opcode,
                    int arg)

shortArg

public void shortArg(int opcode,
                     int arg)

intArg

public void intArg(int opcode,
                   int arg)

anewarray

public void anewarray(TypeID id)

Throws:

java.lang.IllegalArgumentException - if id is a primitive type

athrow

public void athrow()

_new

public void _new(TypeID id)

Throws:

java.lang.IllegalArgumentException - if id is a primitive type

checkcast

public void checkcast(TypeID id)

Throws:

java.lang.IllegalArgumentException - if id is a primitive type

dup

public void dup()

dup2

public void dup2()

dup_x1

public void dup_x1()

dup2_x1

public void dup2_x1()

dup_x2

public void dup_x2()

dup2_x2

public void dup2_x2()

getfield

public void getfield(FieldID id)

getstatic

public void getstatic(FieldID id)

add

public void add(int incr)

_instanceof

public void _instanceof(TypeID id)

Throws:

java.lang.IllegalArgumentException - if id is a primitive type

writeRef

public void writeRef(MemberID id)

newarray

public void newarray(TypeID component)

lconst

public void lconst(long value)

dconst

public void dconst(double value)

fconst

public void fconst(float f)

sconst

public void sconst(java.lang.String s)

bconst

public void bconst(boolean value)

iconst

public void iconst(int value)

pop2

public void pop2()

putfield

public void putfield(FieldID id)

putstatic

public void putstatic(FieldID id)

jumpForwards

public int jumpForwards()

Inserts a forward jump. Equivalent to branchForwards(Opcodes.JVM_goto)

Returns:

Address to be passed to patch method.

branchForwards

public int branchForwards(int opcode)

Inserts a forward branch

Parameters:

opcode - Opcode for the branch.

Returns:

Address to be passed to patch method.

branchBackwards

public void branchBackwards(int opcode,
                            int address)

Inserts a backwards branch.

Parameters:

opcode - Opcode for the branch.

address - The target address.

jumpBackwards

public void jumpBackwards(int address)

Inserts a backwards jump. Equivalent to branchBackwards(Opcodes.JVM_goto)

Parameters:

address - The target address.

writeShortAt

public void writeShortAt(int address,
                         int value)

patch

public void patch(int address)

Patches a forward jump or branch, to branch to the current address.

Parameters:

address - the address returned by the coresponding forward jump or branch.

handleException

public void handleException(int start,
                            int end,
                            TypeID type,
                            int target)

beginSub

public void beginSub()

endSub

public void endSub()

getLocalVariableTable

public Attribute getLocalVariableTable()

addLocalVariableName

public void addLocalVariableName(int start,
                                 int length,
                                 java.lang.String name,
                                 TypeID type,
                                 int index)