Timed Runtime Monitoring for Multiparty Conversations

• Published in: Electronic Proceedings in Theoretical Computer Science
• Main Authors: Rumyana Neykova, Laura Bocchi, Nobuko Yoshida
• Format: Article
• Language: English
• Published: Open Publishing Association 2014-08-01
• Online Access: http://arxiv.org/pdf/1408.5979v1

We propose a dynamic verification framework for protocols in real-time distributed systems. The framework is based on Scribble, a tool-chain for design and verification of choreographies based on multiparty session types, developed with our industrial partners. Drawing from recent work on multiparty session types for real-time interactions, we extend Scribble with clocks, resets, and clock predicates constraining the times in which interactions should occur. We present a timed API for Python to program distributed implementations of Scribble specifications. A dynamic verification framework ensures the safe execution of applications written with our timed API: we have implemented dedicated runtime monitors that check that each interaction occurs at a correct timing with respect to the corresponding Scribble specification. The performance of our implementation and its practicability are analysed via benchmarking.