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A Study of Concurrency Bugs in an Open Source Software

Abstract : Concurrent programming puts demands on software debugging and testing, as concurrent software may exhibit problems not present in sequential software, e.g., deadlocks and race conditions. In aiming to increase efficiency and effectiveness of debugging and bug-fixing for concurrent software, a deep understanding of concurrency bugs, their frequency and fixing-times would be helpful. Similarly, to design effective tools and techniques for testing and debugging concurrent software understanding the differences between non-concurrency and concurrency bugs in real-word software would be useful. This paper presents an empirical study focusing on understanding the differences and similarities between concurrency bugs and other bugs, as well as the differences among various concurrency bug types in terms of their severity and their fixing time. Our basis is a comprehensive analysis of bug reports covering several generations of an open source software system. The analysis involves a total of 4872 bug reports from the last decade, including 221 reports related to concurrency bugs. We found that concurrency bugs are different from other bugs in terms of their fixing time and their severity. Our findings shed light on concurrency bugs and could thereby influence future design and development of concurrent software, their debugging and testing, as well as related tools.
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Submitted on : Tuesday, September 20, 2016 - 2:13:46 PM
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Sara Abbaspour Asadollah, Daniel Sundmark, Sigrid Eldh, Hans  Hansson, Eduard Enoiu. A Study of Concurrency Bugs in an Open Source Software. 12th IFIP International Conference on Open Source Systems (OSS), May 2016, Gothenburg, Sweden. pp.16-31, ⟨10.1007/978-3-319-39225-7_2⟩. ⟨hal-01369048⟩

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