Actris 2.0: Asynchronous session-type based reasoning in separation logic

Message passing is a useful abstraction for implementing concurrent programs. For real-world systems, however, it is often combined with other programming and concurrency paradigms, such as higher-order functions, mutable state, shared-memory concurrency, and locks. We present Actris: a logic for proving functional correctness of programs...

Machine-checked semantic session typing

Session types- A family of type systems for message-passing concurrency-have been subject to many extensions, where each extension comes with a separate proof of type safety. These extensions cannot be readily combined, and their proofs of type safety are generally not machine checked, making their correctness less trustworthy. We overcome...

Intrinsically-Typed Definitional Interpreters for Linear, Session-Typed Languages

An intrinsically-typed definitional interpreter is a concise specification of dynamic semantics, that is executable and type safe by construction. Unfortunately, scaling intrinsically-typed definitional interpreters to more complicated object languages often results in definitions that are cluttered with manual proof work. For linearly-typed...

Actris: Session-type based reasoning in separation logic

Message passing is a useful abstraction to implement concurrent programs. For real-world systems, however, it is often combined with other programming and concurrency paradigms, such as higher-order functions, mutable state, shared-memory concurrency, and locks. We present Actris: a logic for proving functional correctness of programs that...

Dependent Types for Invariants in Session Types

Session types are a formal method to describe communication protocols between two or more actors. Protocols that type check are guaranteed to respect communication safety, linearity, progress, and session fidelity. Basic session types, however, do not in general guarantee anything about the contents of messages, while real-life applications of...