Package serp.bytecode

Class WideInstruction

java.lang.Object

serp.bytecode.CodeEntry

serp.bytecode.Instruction

serp.bytecode.TypedInstruction

serp.bytecode.LocalVariableInstruction

serp.bytecode.WideInstruction

All Implemented Interfaces:

BCEntity, VisitAcceptor

public class WideInstruction
extends LocalVariableInstruction

The wide instruction, which is used to allow other instructions to index values beyond what they can normally index baed on the length of their arguments.

Field Summary

Fields

Modifier and Type	Field	Description
private int	_inc
private int	_ins
private static java.lang.Class[][]	_mappings

Fields inherited from class serp.bytecode.CodeEntry

byteIndex, next, prev

Constructor Summary

Constructors

Constructor	Description
WideInstruction(Code owner)

Method Summary

Modifier and Type	Method	Description
void	acceptVisit(BCVisitor visit)	Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
WideInstruction	aload()	Set the type of instruction this wide instruction modifies.
WideInstruction	astore()	Set the type of instruction this wide instruction modifies.
WideInstruction	dload()	Set the type of instruction this wide instruction modifies.
WideInstruction	dstore()	Set the type of instruction this wide instruction modifies.
boolean	equalsInstruction(Instruction other)	WideInstructions are equal if the instruction they augment is the same or unset.
WideInstruction	fload()	Set the type of instruction this wide instruction modifies.
WideInstruction	fstore()	Set the type of instruction this wide instruction modifies.
int	getIncrement()	Return the increment for this instruction if it augments IINC, or -1 if unset.
int	getInstruction()	Return the opcode of the instruction to modify; this will return one of the constants defined in Constants.
(package private) int	getLength()	Return the length in bytes of this opcode, including all arguments.
int	getLogicalStackChange()	Return the logical number of stack positions changed by this instruction.
int	getStackChange()	Return the number of stack positions this instruction pushes or pops during its execution.
java.lang.String	getTypeName()	Return the type name for this instruction.
WideInstruction	iinc()	Set the type of instruction this wide instruction modifies.
WideInstruction	iload()	Set the type of instruction this wide instruction modifies.
WideInstruction	istore()	Set the type of instruction this wide instruction modifies.
WideInstruction	lload()	Set the type of instruction this wide instruction modifies.
WideInstruction	lstore()	Set the type of instruction this wide instruction modifies.
(package private) void	read(java.io.DataInput in)	Read the arguments for this opcode from the given stream.
(package private) void	read(Instruction orig)	Copy the given instruction data.
WideInstruction	ret()	Set the type of instruction this wide instruction modifies.
WideInstruction	setIncrement(int val)	Set the increment on this instruction if it augments IINC.
WideInstruction	setInstruction(int opcode)	Set the type of instruction this wide instruction modifies.
WideInstruction	setInstruction(Instruction ins)	Set the type of instruction this wide instruction modifies.
TypedInstruction	setType(java.lang.String type)	Set the type of this instruction.
(package private) void	write(java.io.DataOutput out)	Write the arguments for this opcode to the given stream.

Methods inherited from class serp.bytecode.LocalVariableInstruction

calculateLocal, calculateOpcode, getLocal, getLocalVariable, getParam, setLocal, setLocalVariable, setParam

Methods inherited from class serp.bytecode.TypedInstruction

getType, getTypeBC, mapType, setType, setType

Methods inherited from class serp.bytecode.Instruction

getByteIndex, getClassLoader, getCode, getLineNumber, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode

Methods inherited from class java.lang.Object

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

Field Detail

_mappings

private static final java.lang.Class[][] _mappings

_ins

private int _ins

_inc

private int _inc

Constructor Detail

WideInstruction

WideInstruction(Code owner)

Method Detail

getLength

int getLength()

Description copied from class: Instruction

Return the length in bytes of this opcode, including all arguments. For many opcodes this method relies on an up-to-date byte index.

Overrides:

getLength in class Instruction

getStackChange

public int getStackChange()

Description copied from class: Instruction

Return the number of stack positions this instruction pushes or pops during its execution.

Overrides:

getStackChange in class Instruction

Returns:

0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack

getLogicalStackChange

public int getLogicalStackChange()

Description copied from class: Instruction

Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.

Overrides:

getLogicalStackChange in class Instruction

getTypeName

public java.lang.String getTypeName()

Description copied from class: TypedInstruction

Return the type name for this instruction. If the type has not been set, this method will return null.

Overrides:

getTypeName in class LocalVariableInstruction

setType

public TypedInstruction setType(java.lang.String type)

Description copied from class: TypedInstruction

Set the type of this instruction. Types that have no direct support will be converted accordingly.

Overrides:

setType in class LocalVariableInstruction

Returns:

this instruction, for method chaining

getInstruction

public int getInstruction()

Return the opcode of the instruction to modify; this will return one of the constants defined in Constants.

setInstruction

public WideInstruction setInstruction(Instruction ins)

Set the type of instruction this wide instruction modifies.

setInstruction

public WideInstruction setInstruction(int opcode)

Set the type of instruction this wide instruction modifies.

iinc

public WideInstruction iinc()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

ret

public WideInstruction ret()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

iload

public WideInstruction iload()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

fload

public WideInstruction fload()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

aload

public WideInstruction aload()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

lload

public WideInstruction lload()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

dload

public WideInstruction dload()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

istore

public WideInstruction istore()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

fstore

public WideInstruction fstore()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

astore

public WideInstruction astore()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

lstore

public WideInstruction lstore()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

dstore

public WideInstruction dstore()

Set the type of instruction this wide instruction modifies.

Returns:

this instruction, for method chaining

getIncrement

public int getIncrement()

Return the increment for this instruction if it augments IINC, or -1 if unset.

setIncrement

public WideInstruction setIncrement(int val)

Set the increment on this instruction if it augments IINC.

Returns:

this Instruction, for method chaining

equalsInstruction

public boolean equalsInstruction(Instruction other)

WideInstructions are equal if the instruction they augment is the same or unset.

Overrides:

equalsInstruction in class LocalVariableInstruction

acceptVisit

public void acceptVisit(BCVisitor visit)

Description copied from interface: VisitAcceptor

Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.

Specified by:

acceptVisit in interface VisitAcceptor

Overrides:

acceptVisit in class Instruction

read

void read(Instruction orig)

Description copied from class: Instruction

Copy the given instruction data.

Overrides:

read in class LocalVariableInstruction

read

void read(java.io.DataInput in)
   throws java.io.IOException

Description copied from class: Instruction

Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

read in class Instruction

Throws:

java.io.IOException

write

void write(java.io.DataOutput out)
    throws java.io.IOException

Description copied from class: Instruction

Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

write in class Instruction

Throws:

java.io.IOException