On Sequentializing Concurrent Programs

Bouajjani, Ahmed, Emmi, Michael and Parlato, Gennaro (2011) On Sequentializing Concurrent Programs At SAS, Italy. 14 - 16 Sep 2011.


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We propose a general framework for compositional under-approximate concurrent program analyses by reduction to sequential program analyses—so-called sequentializations. We notice the existing sequentializations—based on bounding the number of execution contexts, execution rounds, or delays from a deterministic task-schedule—rely on three key features for scalable concurrent program analyses: (i) reduction to the sequential program model, (ii) compositional reasoning to avoid expensive task-product constructions, and (iii) parameterized exploration bounds. To understand how those sequentializations can be unified and generalized, we define a general framework which preserves their key features, and in which those sequentializations are particular instances. We also identify a most general instance which considers more executions, by composing the rounds of different tasks in any order, restricted only by the unavoidable program and task-creation causality orders. In fact, we show this general instance is fundamentally more powerful by identifying an infinite family of state-reachability problems (to states g1,g2,...) which can be answered precisely with a fixed exploration bound, whereas the existing sequentializations require an increasing bound k to reach each gk. Our framework applies to a general class of shared-memory concurrent programs, with dynamic task-creation and arbitrary preemption.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 14-16 September 2011
Venue - Dates: SAS, Italy, 2011-09-14 - 2011-09-16
Organisations: Electronic & Software Systems
ePrint ID: 272451
Date :
Date Event
2011Accepted/In Press
Date Deposited: 13 Jun 2011 13:21
Last Modified: 17 Apr 2017 17:44
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/272451

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