Blogs (28) >>
ECOOP 2016
Sun 17 - Fri 22 July 2016 Rome, Italy
Wed 20 Jul 2016 13:45 - 14:10 at Auditorium Loyola - Session 2 Chair(s): James Noble
The ability to specify immutability in a programming language is a powerful tool for developers, enabling them to better understand and more safely transform their code without fearing unintended changes to program state. The C++ programming language allows developers to specify a form of immutability using the `const` keyword. In this work, we characterize the meaning of the C++ `const` qualifier and present the ConstSanitizer tool, which dynamically verifies a stricter form of immutability than that defined in C++: it identifies `const` uses that are either not consistent with transitive immutability, that write to mutable fields, or that write to formerly-`const` objects whose const`-ness has been cast away.

We evaluate a set of 7 C++ benchmark programs to find writes-through-const, establish root causes for how they fail to respect our stricter definition of immutability, and assign attributes to each write (namely: synchronized, not visible, buffer/cache, delayed initialization, and incorrect). ConstSanitizer finds 17 archetypes for writes in these programs which do not respect our version of immutability. Over half of these seem unnecessary to us. Our classification and observations of behaviour in practice contribute to the understanding of a widely-used C++ language feature.

Wed 20 Jul

Displayed time zone: Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna change

13:45 - 15:00
Session 2Research Track at Auditorium Loyola
Chair(s): James Noble Victoria University of Wellington
C++ const and Immutability: An Empirical Study of Writes-Through-const[AEC approved]
Research Track
Jonathan Eyolfson University of Waterloo, Patrick Lam University of Waterloo, Canada
Link to publication DOI Pre-print Media Attached
Formal Language Recognition with the Java Type CheckerDistinguished Paper
Research Track
Yossi Gil Israel Institute of Technology, Tomer Levy Technion – Israel Institute of Technology
Link to publication DOI
Towards Ontology-Based Program Analysis
Research Track
Link to publication DOI Media Attached