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Kalas: A Verified, End-To-End Compiler for a Choreographic Language

Authors Johannes Åman Pohjola, Alejandro Gómez-Londoño , James Shaker, Michael Norrish

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Author Details

Johannes Åman Pohjola
  • University of New South Wales, Sydney, Australia
Alejandro Gómez-Londoño
  • Chalmers University of Technology, Gothenburg, Sweden
James Shaker
  • Australian National University, Canberra, Australia
Michael Norrish
  • Australian National University, Canberra, Australia

Acknowledgements

We are grateful to Marco Carbone, Rob van Glabbeek and Magnus Myreen for insightful discussion on this work.

Cite AsGet BibTex

Johannes Åman Pohjola, Alejandro Gómez-Londoño, James Shaker, and Michael Norrish. Kalas: A Verified, End-To-End Compiler for a Choreographic Language. In 13th International Conference on Interactive Theorem Proving (ITP 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 237, pp. 27:1-27:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)
https://doi.org/10.4230/LIPIcs.ITP.2022.27

Abstract

Choreographies are an abstraction for globally describing deadlock-free communicating systems. A choreography can be compiled into multiple endpoints preserving the global behavior, providing a path for concrete system implementations. Of course, the soundness of this approach hinges on the correctness of the compilation function. In this paper, we present a verified compiler for Kalas, a choreographic language. Its machine-checked end-to-end proof of correctness ensures all generated endpoints adhere to the system description, preserving the top-level communication guarantees. This work uses the verified CakeML compiler and Hol4 proof assistant, allowing for concrete executable implementations and statements of correctness at the machine code level for multiple architectures.

Subject Classification

ACM Subject Classification
  • Theory of computation → Concurrency
  • Software and its engineering → Software verification
  • Software and its engineering → Compilers
Keywords
  • Choreographies
  • Interactive Theorem Proving
  • Compiler Verification

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