gov.nasa.jpf.jvm.bytecode

Class ArrayLoadInstruction

java.lang.Object

gov.nasa.jpf.vm.Instruction

gov.nasa.jpf.vm.bytecode.ArrayElementInstruction

gov.nasa.jpf.jvm.bytecode.JVMArrayElementInstruction

gov.nasa.jpf.jvm.bytecode.ArrayLoadInstruction

All Implemented Interfaces:

JVMInstruction, Attributable, InstructionInterface, ReadOrWriteInstruction, java.lang.Cloneable

Direct Known Subclasses:

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

public abstract class ArrayLoadInstruction
extends JVMArrayElementInstruction
implements JVMInstruction

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

Field Summary

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

arrayOperandAttr, arrayRef, index, indexOperandAttr

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

attr, insnIndex, mi, position

Constructor Summary

Constructors

Constructor and Description
ArrayLoadInstruction()

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.
boolean	isRead()
protected boolean	isReference()
java.lang.Object	peekArrayAttr(ThreadInfo ti)
int	peekArrayRef(ThreadInfo ti) only makes sense pre-exec
int	peekIndex(ThreadInfo ti)
java.lang.Object	peekIndexAttr(ThreadInfo ti)
protected abstract void	push(StackFrame frame, ElementInfo e, int index)

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

getArrayOperandAttr, getArrayRef, getElementInfo, getElementSize, getIndex, getIndexOperandAttr, isReferenceArray, peekArrayElementInfo

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

addAttr, asInstruction, attrIterator, attrIterator, cleanupTransients, getAttr, getAttr, getFileLocation, getFilePos, getInstructionIndex, getLength, 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, getByteCode, getFileLocation, getFilePos, getInstructionIndex, getLength, 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

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 interface InstructionInterface

Specified by:

execute in class Instruction

isReference

protected boolean isReference()

peekArrayRef

public int peekArrayRef(ThreadInfo ti)

only makes sense pre-exec

Specified by:

peekArrayRef in class JVMArrayElementInstruction

peekArrayAttr

public java.lang.Object peekArrayAttr(ThreadInfo ti)

Specified by:

peekArrayAttr in class JVMArrayElementInstruction

peekIndex

public int peekIndex(ThreadInfo ti)

Specified by:

peekIndex in class JVMArrayElementInstruction

peekIndexAttr

public java.lang.Object peekIndexAttr(ThreadInfo ti)

Specified by:

peekIndexAttr in class JVMArrayElementInstruction

push

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

Throws:

ArrayIndexOutOfBoundsExecutiveException

isRead

public boolean isRead()

Specified by:

isRead in interface ReadOrWriteInstruction

Specified by:

isRead in class JVMArrayElementInstruction

accept

public void accept(JVMInstructionVisitor insVisitor)

Specified by:

accept in interface JVMInstruction