gov.nasa.jpf.jvm.bytecode

Class ArrayLoadInstruction

java.lang.Object

gov.nasa.jpf.vm.Instruction

gov.nasa.jpf.jvm.JVMInstruction

gov.nasa.jpf.jvm.bytecode.ArrayInstruction

gov.nasa.jpf.jvm.bytecode.ArrayElementInstruction

gov.nasa.jpf.jvm.bytecode.ArrayLoadInstruction

All Implemented Interfaces:

InstructionVisitorAcceptor, Cloneable

Direct Known Subclasses:

AALOAD, BALOAD, CALOAD, FALOAD, IALOAD, LongArrayLoadInstruction, SALOAD

public abstract class ArrayLoadInstruction
extends ArrayElementInstruction

abstraction for all array load instructions ..., array, index => ..., value

Field Summary

Fields inherited from class gov.nasa.jpf.jvm.bytecode.ArrayElementInstruction

index

Fields inherited from class gov.nasa.jpf.jvm.bytecode.ArrayInstruction

arrayRef

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

attr, insnIndex, mi, position

Constructor Summary

Constructors

Constructor and Description
ArrayLoadInstruction()

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(InstructionVisitor 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.
boolean	isRead()
protected boolean	isReference()
protected int	peekArrayRef(ThreadInfo ti) only makes sense pre-exec
protected int	peekIndex(ThreadInfo ti)
protected abstract void	push(StackFrame frame, ElementInfo e, int index)

Methods inherited from class gov.nasa.jpf.jvm.bytecode.ArrayElementInstruction

createAndSetArrayCG, getElementSize, getIndex

Methods inherited from class gov.nasa.jpf.jvm.bytecode.ArrayInstruction

getArrayRef

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayLoadInstruction

public ArrayLoadInstruction()

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 class Instruction

isReference

protected boolean isReference()

peekArrayRef

protected int peekArrayRef(ThreadInfo ti)

only makes sense pre-exec

Specified by:

peekArrayRef in class ArrayInstruction

peekIndex

protected int peekIndex(ThreadInfo ti)

Specified by:

peekIndex in class ArrayElementInstruction

push

protected abstract void push(StackFrame frame,
        ElementInfo e,
        int index)
                      throws ArrayIndexOutOfBoundsExecutiveException

Throws:

ArrayIndexOutOfBoundsExecutiveException

isRead

public boolean isRead()

Specified by:

isRead in class ArrayElementInstruction

accept

public void accept(InstructionVisitor insVisitor)

Specified by:

accept in interface InstructionVisitorAcceptor

Overrides:

accept in class ArrayInstruction