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ICFP 2016
Sun 18 - Sat 24 September 2016 Nara, Japan
Mon 19 Sep 2016 14:30 - 14:55 at Noh Theater - Session 2 Chair(s): Kathleen Fisher

We present a framework aimed at significantly reducing the cost of verifying certain classes of systems software, such as file systems. Our framework allows for equational reasoning about systems code written in our new language, Cogent. Cogent is a restricted, polymorphic, higher-order, and purely functional language with linear types and without the need for a trusted runtime or garbage collector. Linear types allow us to assign two semantics to the language: one imperative, suitable for efficient C code generation; and one functional, suitable for equational reasoning and verification. As Cogent is a restricted language, it is designed to easily interoperate with existing C functions and to connect to existing C verification frameworks. Our framework is based on certifying compilation: For a well-typed Cogent program, our compiler produces C code, a high-level shallow embedding of its semantics in Isabelle/HOL, and a proof that the C code correctly refines this embedding. Thus one can reason about the full semantics of real-world systems code productively and equationally, while retaining the interoperability and leanness of C. The compiler certificate is a series of language-level proofs and per-program translation validation phases, combined into one coherent top-level theorem in Isabelle/HOL.

Mon 19 Sep
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13:40 - 14:55: Research Papers - Session 2 at Noh Theater
Chair(s): Kathleen FisherTufts University
icfp-2016-papers13:40 - 14:05
Yong Kiam TanIHPC at A*STAR, Singapore, Magnus O. MyreenChalmers University of Technology, Sweden, Ramana KumarData61 at CSIRO, Australia, Anthony FoxUniversity of Cambridge, UK, Scott OwensUniversity of Kent, UK, Michael NorrishData61 at CSIRO, Australia
icfp-2016-papers14:05 - 14:30
Paul DownenUniversity of Oregon, USA, Luke MaurerUniversity of Oregon, USA, Zena M. AriolaUniversity of Oregon, USA, Simon Peyton JonesMicrosoft Research, UK
icfp-2016-papers14:30 - 14:55
Liam O'ConnorUNSW, Australia, Zilin ChenUNSW, Australia, Christine RizkallahUniversity of Pennsylvania, USA, Sidney AmaniUNSW, Australia, Japheth LimData61, Australia, Toby MurrayUniversity of Melbourne, Australia, Yutaka NagashimaData61, Australia, Thomas SewellUNSW, Australia, Gerwin KleinUNSW, Australia