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Redmond, WA 98052This page intentionally left blank. 1 2008/9/11A Calculus of Atomic Actions (2008)
BibTeX
@MISC{Elmas08redmond,wa,
author = {Tayfun Elmas and Shaz Qadeer and Serdar Tasiran},
title = {Redmond, WA 98052This page intentionally left blank. 1 2008/9/11A Calculus of Atomic Actions},
year = {2008}
}
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Abstract
We present a proof calculus and method for the static verification of assertions and procedure specifications in shared-memory concurrent programs. The key idea in our approach is to use atomicity as a proof tool and to simplify the verification of assertions by rewriting programs to consist of larger atomic actions. We propose a novel, iterative proof style in which alternating use of abstraction and reduction is exploited to compute larger atomic code blocks in a sound manner. This makes possible the verification of assertions in the transformed program by simple sequential reasoning within atomic blocks, or significantly simplified application of existing concurrent program verification techniques such as the Owicki-Gries or rely-guarantee methods. Our method facilitates a clean separation of concerns where at each phase of the proof, the user worries only about only either the sequential properties or the concurrency control mechanisms in the program. We implemented our method in a tool called QED. We demonstrate the simplicity and effectiveness of our approach on a number of benchmarks including ones with intricate concurrency protocols. 1.
Keyphrases
atomic action atomic code block transformed program concurrent program verification technique proof calculus simple sequential reasoning clean separation iterative proof style key idea atomic block concurrency control mechanism rely-guarantee method static verification intricate concurrency protocol proof tool sequential property sound manner shared-memory concurrent program procedure specification
