gov.nasa.jpf.jvm.bytecode

Class VirtualInvocation

java.lang.Object

gov.nasa.jpf.vm.Instruction

gov.nasa.jpf.jvm.JVMInstruction

gov.nasa.jpf.jvm.bytecode.InvokeInstruction

gov.nasa.jpf.jvm.bytecode.InstanceInvocation

gov.nasa.jpf.jvm.bytecode.VirtualInvocation

All Implemented Interfaces:

InstructionVisitorAcceptor, Cloneable

Direct Known Subclasses:

INVOKEINTERFACE, INVOKEVIRTUAL

public abstract class VirtualInvocation
extends InstanceInvocation

a base class for virtual call instructions

Field Summary

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

argSize, arguments, cname, invokedMethod, lastObj, mname, signature

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

attr, insnIndex, mi, position

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VirtualInvocation()
protected	VirtualInvocation(String clsDescriptor, String methodName, String signature)

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.
Object	getFieldValue(String id, ThreadInfo ti)
MethodInfo	getInvokedMethod(ThreadInfo ti)
MethodInfo	getInvokedMethod(ThreadInfo ti, int objRef)
protected boolean	isLastUnlock(ElementInfo ei) If the object will still be owned, then the current thread can go on.
protected boolean	isLockOwner(ThreadInfo ti, ElementInfo ei) If the current thread already owns the lock, then the current thread can go on.
Instruction	typeSafeClone(MethodInfo clonedMethod) this is overridden by any Instruction that use a cache for class or method to provide a type safe cloning

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

getCalleeThis, getThisElementInfo

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

checkSyncCG, getArgSize, getArgumentAttrs, getArgumentValue, getArgumentValues, getFieldOrArgumentValue, getInvokedMethod, getInvokedMethodClassName, getInvokedMethodName, getInvokedMethodSignature, getLastObjRef, getLength, getReturnType, getReturnTypeName, hasArgumentAttr, hasAttrRefArgument, isCompleted, isReferenceReturnType, setInvokedMethod, setupCallee

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

VirtualInvocation

protected VirtualInvocation()

VirtualInvocation

protected VirtualInvocation(String clsDescriptor,
                 String methodName,
                 String signature)

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

isLockOwner

protected boolean isLockOwner(ThreadInfo ti,
                  ElementInfo ei)

If the current thread already owns the lock, then the current thread can go on. For example, this is a recursive acquisition.

isLastUnlock

protected boolean isLastUnlock(ElementInfo ei)

If the object will still be owned, then the current thread can go on. For example, all but the last monitorexit for the object.

getInvokedMethod

public MethodInfo getInvokedMethod(ThreadInfo ti)

Specified by:

getInvokedMethod in class InvokeInstruction

getInvokedMethod

public MethodInfo getInvokedMethod(ThreadInfo ti,
                          int objRef)

getFieldValue

public Object getFieldValue(String id,
                   ThreadInfo ti)

Specified by:

getFieldValue in class InvokeInstruction

accept

public void accept(InstructionVisitor insVisitor)

Specified by:

accept in interface InstructionVisitorAcceptor

Overrides:

accept in class InstanceInvocation

typeSafeClone

public Instruction typeSafeClone(MethodInfo clonedMethod)

Description copied from class: Instruction

this is overridden by any Instruction that use a cache for class or method to provide a type safe cloning

Overrides:

typeSafeClone in class InvokeInstruction