gov.nasa.jpf.jvm.bytecode

Class LDC

java.lang.Object

gov.nasa.jpf.vm.Instruction

gov.nasa.jpf.jvm.bytecode.LDC

All Implemented Interfaces:

JVMInstruction, Attributable, InstructionInterface, java.lang.Cloneable

Direct Known Subclasses:

LDC_W

public class LDC
extends Instruction
implements JVMInstruction

Push item from runtime constant pool ... => ..., value

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LDC.Type

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	string
protected int	value

Fields inherited from class gov.nasa.jpf.vm.Instruction

attr, insnIndex, mi, position

Constructor Summary

Constructors

Constructor and Description
LDC()
LDC(float f)
LDC(int v)
LDC(java.lang.String s, boolean isClass)

Method Summary

Modifier and Type	Method and Description
void	accept(JVMInstructionVisitor insVisitor)
Instruction	execute(ThreadInfo ti) this is the real workhorse returns next instruction to enter in this thread <2do> it's unfortunate we roll every side effect into this method, because it diminishes the value of the 'executeInstruction' notification: all insns that require some sort of late binding (InvokeVirtual, GetField, ..) are not yet fully analyzable (e.g.
int	getByteCode()
java.lang.String	getClassValue()
float	getFloatValue()
int	getLength() return the length in bytes of this instruction.
java.lang.String	getStringValue()
LDC.Type	getType()
int	getValue()
boolean	isString()

Methods inherited from class gov.nasa.jpf.vm.Instruction

addAttr, asInstruction, attrIterator, attrIterator, cleanupTransients, getAttr, getAttr, getFileLocation, getFilePos, getInstructionIndex, getLineNumber, getMethodInfo, getMnemonic, getNext, getNext, getNextAttr, getPosition, getPrev, getSourceLine, getSourceLocation, getSourceOrLocation, hasAttr, hasAttr, init, isBackJump, isCompleted, isExtendedInstruction, isFirstInstruction, isMonitorEnterPrologue, isSchedulingRelevant, removeAttr, replaceAttr, requiresClinitExecution, setAttr, setContext, setLocation, setMethodInfo, toPostExecString, toString, typeSafeClone

Methods inherited from class java.lang.Object

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

Methods inherited from interface gov.nasa.jpf.vm.bytecode.InstructionInterface

asInstruction, getFileLocation, getFilePos, getInstructionIndex, getLineNumber, getMethodInfo, getMnemonic, getNext, getNext, getPosition, getPrev, getSourceLine, getSourceLocation, isBackJump, isCompleted, isExtendedInstruction, isFirstInstruction, toPostExecString

Methods inherited from interface gov.nasa.jpf.util.Attributable

addAttr, attrIterator, attrIterator, getAttr, getAttr, getNextAttr, hasAttr, hasAttr, removeAttr, replaceAttr, setAttr

Field Detail

string

protected java.lang.String string

value

protected int value

Constructor Detail

LDC

public LDC()

LDC

public LDC(java.lang.String s,
           boolean isClass)

LDC

public LDC(int v)

LDC

public LDC(float f)

Method Detail

execute

public Instruction execute(ThreadInfo ti)

Description copied from class: Instruction

this is the real workhorse returns next instruction to enter in this thread <2do> it's unfortunate we roll every side effect into this method, because it diminishes the value of the 'executeInstruction' notification: all insns that require some sort of late binding (InvokeVirtual, GetField, ..) are not yet fully analyzable (e.g. the callee of InvokeVirtuals is not known yet), putting the burden of duplicating the related code of enter() in the listener. It would be better if we factor this 'prepareExecution' out of enter()

Specified by:

execute in interface InstructionInterface

Specified by:

execute in class Instruction

getLength

public int getLength()

Description copied from class: Instruction

return the length in bytes of this instruction. override if this is not 1

Specified by:

getLength in interface InstructionInterface

Overrides:

getLength in class Instruction

getByteCode

public int getByteCode()

Specified by:

getByteCode in interface InstructionInterface

getValue

public int getValue()

getType

public LDC.Type getType()

isString

public boolean isString()

getFloatValue

public float getFloatValue()

getStringValue

public java.lang.String getStringValue()

getClassValue

public java.lang.String getClassValue()

accept

public void accept(JVMInstructionVisitor insVisitor)

Specified by:

accept in interface JVMInstruction