Efficient Synthesis for Concurrency by Semantics-Preserving Transformations

Černý, Pavol and Henzinger, Thomas A and Radhakrishna, Arjun and Ryzhyk, Leonid and Tarrach, Thorsten (2013) Efficient Synthesis for Concurrency by Semantics-Preserving Transformations. Computer Aided Verification '13, 8044. pp. 951-967.

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Official URL: http://dx.doi.org/10.1007/978-3-642-39799-8_68

Abstract

We develop program synthesis techniques that can help programmers fix concurrency-related bugs. We make two new contributions to synthesis for concurrency, the first improving the efficiency of the synthesized code, and the second improving the efficiency of the synthesis procedure itself. The first contribution is to have the synthesis procedure explore a variety of (sequential) semantics-preserving program transformations. Classically, only one such transformation has been considered, namely, the insertion of synchronization primitives (such as locks). Based on common manual bug-fixing techniques used by Linux device-driver developers, we explore additional, more efficient transformations, such as the reordering of independent instructions. The second contribution is to speed up the counterexample-guided removal of concurrency bugs within the synthesis procedure by considering partial-order traces (instead of linear traces) as counterexamples. A partial-order error trace represents a set of linear (interleaved) traces of a concurrent program all of which lead to the same error. By eliminating a partial-order error trace, we eliminate in a single iteration of the synthesis procedure all linearizations of the partial-order trace. We evaluated our techniques on several simplified examples of real concurrency bugs that occurred in Linux device drivers.

Item Type: Article
DOI: 10.1007/978-3-642-39799-8_68
Subjects: 000 Computer science, knowledge & general works > 000 Computer science, knowledge & systems
000 Computer science, knowledge & general works > 000 Computer science, knowledge & systems > 004 Data processing & computer science
Research Group: Henzinger Group
Depositing User: Thorsten Tarrach
Date Deposited: 28 Apr 2014 09:10
Last Modified: 24 Sep 2014 11:55
URI: https://repository.ist.ac.at/id/eprint/199

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