Resource usage analysis for the π-calculus

  • Authors:
  • Naoki Kobayashi;Kohei Suenaga;Lucian Wischik

  • Affiliations:
  • Tohoku University;University of Tokyo;Microsoft Corporation

  • Venue:
  • VMCAI'06 Proceedings of the 7th international conference on Verification, Model Checking, and Abstract Interpretation
  • Year:
  • 2006

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Abstract

We propose a type-based resource usage analysis for the (pi)-calculus extended with resource creation/access primitives. The goal of the resource usage analysis is to statically check that a program accesses resources such as files and memory in a valid manner. Our type system is an extension of previous behavioral type systems for the pi-calculus, and can guarantee the safety property that no invalid access is performed, as well as the property that necessary accesses (such as the close operation for a file) are eventually performed unless the program diverges. A sound type inference algorithm for the type system is also developed to free the programmer from the burden of writing complex type annotations. Based on the algorithm, we have implemented a prototype resource usage analyzer for the π-calculus. To the authors' knowledge, ours is the first type-based resource usage analysis that deals with an expressive concurrent language like the π-calculus.