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.
@InProceedings{sundmark_et_al:OASIcs.WCET.2007.1191, author = {Sundmark, Daniel and Petterson, Anders and Sandberg, Christer and Ermedahl, Andreas and Thane, Henrik}, title = {{Finding DU-Paths for Testing of Multi-Tasking Real-Time Systems using WCET Analysis}}, booktitle = {7th International Workshop on Worst-Case Execution Time Analysis (WCET'07)}, pages = {1--6}, series = {Open Access Series in Informatics (OASIcs)}, ISBN = {978-3-939897-05-7}, ISSN = {2190-6807}, year = {2007}, volume = {6}, editor = {Rochange, Christine}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2007.1191}, URN = {urn:nbn:de:0030-drops-11914}, doi = {10.4230/OASIcs.WCET.2007.1191}, annote = {Keywords: Testing, Real-time systems, WCET analysis, data flow} }
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