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An Automatable Framework for Formal Specification & Verification of Aspect Oriented Program

An Automatable Framework for Formal Specification & Verification of Aspect Oriented Programs M. Nafees Qamar1 *, Aamer Nadeem2 , M. Uzair Khan2

1COMSATS Institute of Information Technology,

Islamabad, Pakistan.

2Center for Software Dependability,

Muhammad Ali Jinnah University,

Islamabad, Pakistan.

1{nafees_qamar@comsats.edu.pk}, 2{anadeem, uzair@jinnah.edu.pk}

Abstract. Formal verification of software is a perennial problem and an

inclusion to formal verification challenges is AOP (Aspect Oriented programs).

Likewise, several contrary formal verification approaches exist for OOP

(Object Oriented programs) but unable to deliver same robustness for AOP

verification and also the proposed approaches to verify AOP seem to be less

effective because of their adoptability for large systems. Although we believe

that the potential solution would be to choose best existing formal methods for

formal verification of AOP to avoid unnecessary additions and modifications in

current state of the art. This paper gives a thorough survey of the existing work.

The paper presents a holistic framework for formal verification of AOP by

formally specifying aspects and classes, autonomously. Then the obtained

specifications are integrated to get filtered definition of the AOP, i.e., merging

the aspect specification with the class specification to preserve execution order

of an AO program. Besides, to verify augmented system, the derivation of

classes through de-compilation from compiled AOP is attained for generating

their corresponding formal specifications. Former and latter generated formal

specifications are compared to analyze the intended and exotic behavior of

aspects. This helps us to ensure that the actual behavior of the system is

according to the one specified. Additionally, our approach helps to identify

ambiguities and contradictions present in the compiled AOP, and allows to

eliminate them. We use Object-Z to write classes and propose our own

notations and constructs for describing aspects and
for formulating filtered

notations and constructs for describing aspects and for formulating filtered

formal specification of classes and aspects using the notion of filters from

RTOZ (Real Time Object-Z∗ ). A possible tool support realizes the automation

process of the framework.

*is a senior member of Center for Software Dependability and presently working as Research Associate at COMSATS Institute of Information Technology, Islamabad.

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