Wed 17 Jul 2019 16:00 - 16:20 at Mancy - Program Analysis 1 Chair(s): Yannis Smaragdakis

We introduce Wasm Logic, a sound program logic for first-order, encapsulated WebAssembly.

We design a novel assertion syntax, tailored to WebAssembly’s stack-based semantics and the strong guarantees given by WebAssembly’s type system, and show how to adapt the standard separation logic triple and proof rules in a principled way to capture WebAssembly’s uncommon structured control flow.

Using Wasm Logic, we specify and verify a simple WebAssembly B-tree library, giving abstract specifications independent of the underlying implementation.

We mechanise Wasm Logic and its soundness proof in full in Isabelle/HOL. As part of the soundness proof, we formalise and fully mechanise a novel, big-step semantics of WebAssembly, which we prove equivalent, up to transitive closure, to the original WebAssembly small-step semantics.

Wed 17 Jul

Displayed time zone: Belfast change

15:40 - 17:00
Program Analysis 1Research Papers at Mancy
Chair(s): Yannis Smaragdakis University of Athens
15:40
20m
Research paper
Static Analysis for Asynchronous JavaScript Programs
Research Papers
Thodoris Sotiropoulos Athens University of Economics and Business, Ben Livshits Imperial College London, UK
DOI
16:00
20m
Research paper
A Program Logic for First-Order Encapsulated WebAssembly
Research Papers
Conrad Watt University of Cambridge, Petar Maksimović Imperial College London, UK and Mathematical Institute of the Serbian Academy of Sciences and Arts, Serbia, Neel Krishnaswami Computer Laboratory, University of Cambridge, Philippa Gardner Imperial College London
DOI Media Attached
16:20
20m
Research paper
Garbage-free Abstract Interpretation through Abstract Reference Counting
Research Papers
Noah Van Es Sofware Languages Lab, Vrije Universiteit Brussel, Quentin Stiévenart Vrije Universiteit Brussel, Belgium, Coen De Roover Vrije Universiteit Brussel
DOI
16:40
20m
Research paper
Eventually Sound Points-To Analysis with Specifications
Research Papers
Osbert Bastani University of Pennsylvania, Rahul Sharma Microsoft Research, Lazaro Clapp Stanford University, Saswat Anand Stanford University, Alex Aiken Stanford University
DOI Media Attached