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Wang, Jue; Jiang, Yanyan; Xu, Chang; Li, Qiwei; Gu, Tianxiao; Ma, Jun; Ma, Xiaoxing; Lu, Jian
Science of computer programming, 10/2018, Letnik: 163Journal Article
Smartphones are indispensable in people's daily activities, and smartphone apps tend to be increasingly concurrent due to the wide use of multi-core devices and technologies. Due to this tendency, developers are increasingly unable to tackle the complexity of concurrent apps and to avoid subtle concurrency bugs. To better address this issue, we propose a novel approach to detecting concurrency bugs in Android apps based on the fact that one can generate simultaneous input events and their schedules for an app, which would easily trigger concurrency bugs in an app. We conduct systematic state space exploration to find potentially conflicting resource accesses in an Android app. The app is then automatically pressure-tested by guided event and schedule generation. We implemented our prototype tool named AATT+ and evaluated it with two sets of real-world Android apps. Benchmarking using 15 Android apps with previously known concurrency bugs, AATT+ and existing concurrency-unaware techniques detected 10 and 1 bugs, respectively. Evaluated with another set of 17 popular Android apps, AATT+ detected 11 concurrency bugs and 7 of them were previously unknown, achieving an over 80% higher detection rate than existing concurrency-unaware techniques. •Proposed an effective approach to detecting concurrency bugs in Android apps by combining event and schedule generation.•Implemented a prototype tool AATT+ and evaluated it using real-world Android apps.•Studied concurrency bugs in our experiments and identified common bug patterns.
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in: SICRIS
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