OASIcs.WCET.2007.1191.pdf
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Finding DU-Paths for Testing of Multi-Tasking Real-Time Systems using WCET Analysis
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7th International Workshop on Worst-Case Execution Time Analysis (WCET'07) (WCET 2007)
Series: Open Access Series in Informatics (OASIcs)
Conference: Workshop on Worst-Case Execution Time Analysis (WCET) - License:
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported license
- Publication Date: 2007-11-13
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Daniel Sundmark, Anders Petterson, Christer Sandberg, Andreas Ermedahl, and Henrik Thane. Finding DU-Paths for Testing of Multi-Tasking Real-Time Systems using WCET Analysis. In 7th International Workshop on Worst-Case Execution Time Analysis (WCET'07). Open Access Series in Informatics (OASIcs), Volume 6, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)
https://doi.org/10.4230/OASIcs.WCET.2007.1191
Abstract
Memory corruption is one of the most common software failures. For sequential software and multi- tasking software with synchronized data accesses, it has been shown that program faults causing memory cor- ruption can be detected by analyzing the relations be- tween defines and uses of variables (DU-based testing). However, such methods are insufficient in preemptive systems, since they lack the ability to detect inter-task shared variable dependencies. In this paper, we propose the use of a system level shared variable DU analy- sis of preemptive multi-tasking real-time software. By deriving temporal attributes of each access to shared data using WCET analysis, and combining this infor- mation with the real-time schedule information, our method also detects inter-task shared variable depen- dencies. The paper also describes how we extended the SWEET tool to derive these temporal attributes.
Subject Classification
Keywords
- Testing
- Real-time systems
- WCET analysis
- data flow
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