Publication Type

Journal Article

Version

acceptedVersion

Publication Date

11-2017

Abstract

A number of high-level languages and libraries have been proposed that offer novel and simple to use abstractions for concurrent, asynchronous, and distributed programming. The execution models that realise them, however, often change over time---whether to improve performance, or to extend them to new language features---potentially affecting behavioural and safety properties of existing programs. This is exemplified by SCOOP, a message-passing approach to concurrent object-oriented programming that has seen multiple changes proposed and implemented, with demonstrable consequences for an idiomatic usage of its core abstraction. We propose a semantics comparison workbench for SCOOP with fully and semi-automatic tools for analysing and comparing the state spaces of programs with respect to different execution models or semantics. We demonstrate its use in checking the consistency of properties across semantics by applying it to a set of representative programs, and highlighting a deadlock-related discrepancy between the principal execution models of SCOOP. Furthermore, we demonstrate the extensibility of the workbench by generalising the formalisation of an execution model to support recently proposed extensions for distributed programming. Our workbench is based on a modular and parameterisable graph transformation semantics implemented in the GROOVE tool. We discuss how graph transformations are leveraged to atomically model intricate language abstractions, how the visual yet algebraic nature of the model can be used to ascertain soundness, and highlight how the approach could be applied to similar languages.

Keywords

concurrent asynchronous programming, distributed programming with message passing, operational semantics, runtime semantics, graph transformation systems, verification/analysis parameterised by semantics, concurrency abstractions, object-oriented programming, software engineering, SCOOP, GROOVE

Discipline

Programming Languages and Compilers | Software Engineering

Research Areas

Software and Cyber-Physical Systems

Publication

Formal Aspects of Computing

Volume

30

Issue

1

First Page

163

Last Page

192

ISSN

0934-5043

Identifier

10.1007/s00165-017-0443-1

Publisher

Springer (part of Springer Nature): Springer Open Choice Hybrid Journals

Additional URL

https://doi.org/10.1007/s00165-017-0443-1

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