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This paper proposes a practical static analysis tool named LUKE, for detecting null pointer dereferences (NPD) in C programs. LUKE first uses a guarded value-dependence graph (VDG) to track the dependence relations of values, and then detects NPD by solving the graph reachability problem on its VDG. To improve accuracy as well as scalability, the detection algorithm leverages heuristic inference algorithms...
For some special domains, if search engines only take advantage of keywords, the searchers need to mater lots of professional terms. Moreover, to refine the search interests, the professional rules and reasoning of those rules should be used. To resolving above problems, this paper focuses on extending search engines via ontology extraction and modeling, semantic rules reasoning algorithm, and feature-based...
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