P.H.S. Brito

Publications (2)0 Total impact

• Source

  Available from: unicamp.br

  Conference Proceeding: Verifying architectural variabilities in software fault tolerance techniques

  P.H.S. Brito, C.M.F. Rubira, R. de Lemos
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  ABSTRACT: This paper considers the representation of different software fault tolerance techniques as a product line architecture (PLA) for promoting the reuse of software artifact. The proposed PLA enables to specify a series of closely related architectural applications, which is obtained by identifying variation points associated with design decisions regarding software fault tolerance. These decisions are used to choose the appropriate technique depending on the features selected, e.g, the number of redundant resources, or the type of adjudicator. The proposed approach also comprises the formalisation of the PLA, using B-method and CSP, for systematising the verification of fault-tolerant software systems at the architectural level. The properties verified cover two complementary contexts: the selection of the correct architectural variabilities for instantiating the PLA, and also the properties of the chosen fault tolerance techniques.
  Software Architecture, 2009 & European Conference on Software Architecture. WICSA/ECSA 2009. Joint Working IEEE/IFIP Conference on; 10/2009
• Conference Proceeding: Architectural-Based Validation of Fault-Tolerant Software

  P.H.S. Brito, R. de Lemos, E. Martins, R. Moraes, C.M.F. Rubira
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  ABSTRACT: Many architecture-centred approaches have been proposed for constructing dependable component-based systems. However, few of them provide an integrated solution for their development that combines fault prevention, fault removal, and fault tolerance techniques. This paper proposes a rigorous development approach based on an architectural abstraction, which combines formal methods and robustness testing. The architectural abstraction assumes a crash failure semantics, and when it is instantiated as an architectural element provides the basis for architecting fault tolerant systems. The architecture is formally specified using the B-method and CSP. Assurances that the software system is indeed dependable are obtained by combining formal specification for removing ambiguities from the architectural representation, and robustness testing for validating the source code against its software architecture. The feasibility of the proposed approach is illustrated in the context of a financial critical system.
  Dependable Computing, 2009. LADC '09. Fourth Latin-American Symposium on; 10/2009