A Type System for Components

Ornela Dardha (1, 2, 3) , Elena Giachino (1, 3) , Michael Lienhardt (1, 4)

1 FOCUS - Foundations of Component-based Ubiquitous Systems
2 DISI - Dipartimento di Scienze dell'Informazione [Bologna]
3 DISI - Department of Computer Science and Engineering [Bologna]
4 PPS - Preuves, Programmes et Systèmes

In modern distributed systems, dynamic reconfiguration, i.e., changing at runtime the communication pattern of a program, is challenging. Generally, it is difficult to guarantee that such modifications will not disrupt ongoing computations. In a previous paper, a solution to this problem was proposed by extending the object-oriented language ABS with a component model allowing the programmer to: i) perform updates on objects by means of communication ports and their rebinding; and ii) precisely specify when such updates can safely occur in an object by means of critical sections. However, improper rebind operations could still occur and lead to runtime errors. The present paper introduces a type system for this component model that extends the ABS type system with the notion of ports and a precise analysis that statically enforces that no object will attempt illegal rebinding.

Domaines: Informatique

Ornela Dardha, Elena Giachino, Michael Lienhardt. A Type System for Components. SEFM - International Conference on Software Engineering and Formal Methods - 2013, 2013, Madrid, Spain. pp.167-181, ⟨10.1007/978-3-642-40561-7_12⟩. ⟨hal-00909310⟩