Abstract. We present the first symbolic execution and automatic test generation tool for C++ programs. First we describe our effort in extending an existing symbolic execution tool for C programs to handle C++ programs. We then show how we made this tool generic, efficient and usable to handle real-life industrial applications. Novel features include extended symbolic virtual machine, library optimization for C and C++, object-level execution and reasoning, interfacing with specific type of efficient solvers, and semi-automatic unit and component testing. This tool is being used to assist the validation and testing of industrial software as well as publicly available programs written using the C++ language.
Abstract. GPU based computing has made significant strides in recent years. Unfortunately, GPU program optimizations can introduce subtle concurrency errors, and so incisive formal bug-hunting methods are essential. This paper presents a new formal bug-hunting method for GPU programs that combine barriers and atomics. We present an algorithm called conflict-directed delay-bounded scheduling algorithm (CD) that exploits the occurrence of conflicts among atomic synchronization commands to trigger the generation of alternate schedules; these alternate schedules are executed in a delay-bounded manner. We formally describe CD, and present two correctness checking methods, one based on final state comparison, and the other on user assertions. We evaluate our implementation on realistic GPU benchmarks, with encouraging results.
Abstract. We present a trusted source translator that transforms total functions defined in the specification language of the HOL theorem prover to simple intermediate code. This translator eliminates polymorphism by code specification, removes higher-order functions through closure conversion, interprets pattern matching as conditional expressions, etc. The target intermediate language can be further translated by proof to a simple imperative language. Each transformation is proven to be correct automatically. The formalization, implementation and mechanical verification of all transformations are done in HOL-4.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.