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Proceedings of the thirty-first SIGCSE technical symposium on computer science education

作者： Chris McDonald Kamran Kazemi Programming Languages and Systems Group Department of Computer Science The University of Western Australia Nedlands Western Australia 6907

ISBN: (纸本)9781581132137

Parallel algorithms are often introduced to students by describing the geometric topologies formed by communicating processes and often the geographic relationships between them. However, the two most common message passing environments used in teaching, PVM and MPI, each provide only rudimentary support for the specification and execution of process topologies. There is a strong need for better syntactic and semantic support for process topologies in these environments, so that students may concentrate on the algorithms being studied, and not have to wrestle with the environments' infrastructure. This paper first motivates, and then describes the use of additional support within PVM and MPI which addresses this need.

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Improving the PVM teaching environment 97

Improving the PVM teaching environment

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Proceedings of the twenty-eighth SIGCSE technical symposium on computer science education

作者： Chris McDonald Kamran Kazemi Programming Languages and Systems Group Department of Computer Science The University of Western Australia Crawley Western Australia 6907

ISBN: (纸本)9780897918893

The parallel programming community has long recognized the need for a simple programming environment offering interprocess communication between heterogeneous systems. As the Parallel Virtual Machine environment, PVM, has emerged to meet this goal, an increasing number of educational institutions are choosing PVM to support their teaching of parallel and distributed computing using networks of workstations. However, it is often the nature of PVM's design and implementation that can severely limit its success in a teaching environment. This paper first motivates and then describes improvements to the PVM environment which increase both robustness and efficiency in an educational setting.

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A hybrid shared memory execution model for a data parallel language with I/O

A hybrid shared memory execution model for a data parallel l...

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作者： Grelck, Clemens Kuthe, Steffen Scholz, Sven-Bodo Institute of Software Technology and Programming Languages University of Lübeck Ratzeburger Allee 160 23538 Lübeck Germany Department of Computer Science University of Hertfordshire College Lane Hatfield AL10 9AB United Kingdom

We propose a novel execution model for the implicitly parallel execution of data parallel programs in the presence of general I/O operations. This model is called hybrid because it combines the advantages of the standard execution models fork/join and SPMD. Based on program analysis the hybrid model adapts itself to one or the other on the granularity of individual instructions. We outline compilation techniques that systematically derive the organization of parallel code from data flow characteristics aiming at the reduction of execution mode switches in general and synchronization/communication requirements in particular. Experiments based on a prototype implementation show the effectiveness of the hybrid execution model for reducing parallel overhead. © 2008 World Scientific Publishing Company.

关键词： Input output programs

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Leveraging Applications of Formal Methods, Verification, and Validation 1

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丛书名： Communications in computer and Information science

1000年

作者： Reiner Hähnle Jens Knoop Tiziana Margaria Dietmar Schreiner Bernhard Steffen

ISBN: (数字)9783642347818

ISBN: (纸本)9783642347801

This volume contains a selection of revised papers that were presented at the Software Aspects of Robotic Systems, SARS 2011 Workshop and the Machine Learning for System Construction, MLSC 2011 Workshop, held during October 17-18 in Vienna, Austria, under the auspices of the International Symposium Series on Leveraging Applications of Formal Methods, Verification, and Validation, ISoLA. The topics covered by the papers of the SARS and the MLSC workshop demonstrate the breadth and the richness of the respective fields of the two workshops stretching from robot programming to languages and compilation techniques, to real-time and fault tolerance, to dependability, software architectures, computer vision, cognitive robotics, multi-robot-coordination, and simulation to bio-inspired algorithms, and from machine learning for anomaly detection, to model construction in software product lines to classification of web service interfaces. In addition the SARS workshop hosted a special session on the recently launched KOROS project on collaborating robot systems that is borne by a consortium of researchers of the faculties of architecture and planning, computer science, electrical engineering and information technology, and mechanical and industrial engineering at the Vienna University of Technology. The four papers devoted to this session highlight important research directions pursued in this interdisciplinary research project.

关键词： Artificial Intelligence Data Mining and Knowledge Discovery Software Engineering Computation by Abstract Devices Information Storage and Retrieval Pattern Recognition

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Specification, implementation, and verification of Domain Specific languages: A logic programming-based approach

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2002年 2407卷 211-239页

作者： Gupta, Gopal Pontelli, Enrico Applied Logic Programming Languages and Systems Lab. Department of Computer Science University of Texas at Dallas Richardson TX 95083 United States Laboratory for Logic Databases and Advanced Programming Department of Computer Science New Mexico State University Las Cruces NM 88003 United States

ISBN: (纸本)3540439595

Domain Specific languages (DSLs) are high level languages designed for solving problems in a particular domain, and have been suggested as means for developing reliable software systems. We present a (constraint) logic programming-based framework for specification, efficient implementation, and automatic verification of domain specific languages (DSLs). Our framework is based on using Horn logic (or pure Prolog), and eventually constraints, to specify denotational semantics of domain specific languages. Both the syntax as well as the semantic specification of the DSL in question are directly executable in our framework: the specification itself serves as an interpreter for the DSL. More efficient implementations of this DSL-a compiler-can be automatically derived via partial evaluation. Additionally, the executable specification can be used for automatic or semi-automatic verification of programs written in the DSL as well as for automatically obtaining traditional debuggers and profilers. The ability to verify DSL programs is a distinct advantage of our approach. In this paper we give a general outline of our approach, and illustrate it with practical examples. © 2002 Springer-Verlag Berlin Heidelberg.

关键词： Specifications

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SAC: Off-the-shelf support for data-parallelism on multicores

SAC: Off-the-shelf support for data-parallelism on multicore...

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DAMP 2007: Workshop on Declarative Aspects of Multicore programming

作者： Grelck, Clemens Scholz, Sven-Bodo University of Lübeck Institute of Software Technology and Programming Languages Ratzeburger Allee 160 23538 Lübeck Germany University of Hertfordshire Department of Computer Science College Lane Hatfield AL10 9AB United Kingdom University of Hertfordshire United Kingdom

ISBN: (纸本)1595936904

The advent of multicore processors has raised new demand for harnessing concurrency in the software mass market. We summarise our previous work on the data parallel, functional array processing language SaC. Its compiler technology is geared towards highly runtime-efficient support for shared memory multiprocessors and, thus, is readily applicable to today's off-the-shelf multicore systems. Copyright 2007 ACM.

关键词： Automatic programming

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Implementing and Executing Static Analysis using LLVM and CodeChecker

arXiv

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arXiv 2024年

作者： Horváth, Gábor Kovács, Réka Nikolett Szalay, Richárd Porkoláb, Zoltán Department of Programming Languages and Compilers Institute of Computer Science Faculty of Informatics Eötvös Loránd University Budapest Hungary

Static analysis is a method to analyse the source code without executing it. It is widely used to find bugs and code smells in industrial software. Among other methods, the most important techniques are the one based on the abstract syntax tree and the one performing symbolic execution. Both of these methods found their role in modern software development as they have different advantages and limitations. In this tutorial, we present two problems from the C++ programming language: the elimination of redundant pointers;and how can we deal with dangling pointers originated from the misuse of the std::string class. These two issues have different theoretical backgrounds and finding them requires different implementation techniques. We will provide a step-by-step guide to implement the checkers – software to identify the aforementioned problems –, one is based on the abstract syntax analysis method, the other will explore the possibilities of the symbolic execution. The methods are explained in great detail and supported by code examples. We intend this tutorial both for architects of static analysis tools and for those developers who want to understand the advantages and the constraints of the individual methods. © 2024, CC BY.

关键词： C++ (programming language)

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WIP: An Engaging Undergraduate Intro to Model Checking in Software Engineering Using TLA+

WIP: An Engaging Undergraduate Intro to Model Checking in So...

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Frontiers in Education (FIE) Conference

作者： Konstantin Läufer Gunda Mertin George K. Thiruvathukal Department of Computer Science Software and Systems Laboratory Loyola University Chicago Institute for Software Engineering and Programming Languages University of Lübeck

ISBN: (数字)9798350351507

ISBN: (纸本)9798350363067

Background: In this Innovative Practice Work in Progress, we present our initial efforts to integrate formal methods, with a focus on model-checking specifications written in Temporal Logic of Actions $(\text{TLA}^{+})$ , into computer science education, targeting undergraduate juniors/seniors and graduate students. Many safety-critical systems and services crucially depend on correct and reliable behavior. Formal methods can play a key role in ensuring correct and safe system behavior, yet remain underutilized in educational and industry contexts. Aims: We aim to (1) qualitatively assess the state of formal methods in computer science programs, (2) construct level-appropriate examples that could be included midway into one's undergraduate studies, (3) demonstrate how to address successive “failuresy” through progressively stringent safety and liveness requirements, and (4) establish an ongoing framework for assessing interest and relevance among students. Methods: We detail our pedagogical strategy for embedding $\text { TLA }^{+}$ into an intermediate course on formal methods at our institution. After starting with a refresher on mathematical logic, students specify the rules of simple puzzles in $\text { TLA }^{+}$ and use its included model checker (known as TLC) to find a solution. We gradually escalate to more complex, dynamic, event-driven systems, such as the control logic of a microwave oven, where students will study safety and liveness requirements. We subsequently discuss explicit concurrency, along with thread safety and deadlock avoidance, by modeling bounded counters and buffers. Results: Our initial findings suggest that through careful curricular design and choice of examples and tools, it is possible to inspire and cultivate a new generation of software engineers proficient in formal methods. Conclusions: Our initial efforts suggest that 84% of our students had a positive experience in our formal methods course. Our future plans include a longitudi

关键词： computer science Open Access Model checking System recovery Software Safety Logic Reliability Proposals Software engineering

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Model-based Generation of Attack-Fault Trees

arXiv

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arXiv 2023年

作者： Groner, Raffaela Witte, Thomas Raschke, Alexander Hirn, Sophie Pekaric, Irdin Frick, Markus Tichy, Matthias Felderer, Michael Institute of Software Engineering and Programming Languages Ulm University Germany Department of Computer Science University of Innsbruck Austria Department of Information Systems and Computer Science University of Liechtenstein Liechtenstein Germany Department of Mathematics and Computer Science University of Cologne Germany

Joint safety and security analysis of cyber-physical systems is a necessary step to correctly capture inter-dependencies between these properties. Attack-Fault Trees represent a combination of dynamic Fault Trees and Attack Trees and can be used to model and model-check a holistic view on both safety and security. Manually creating a complete AFT for the whole system is, however, a daunting task. It needs to span multiple abstraction layers, e.g., abstract application architecture and data flow as well as system and library dependencies that are affected by various vulnerabilities. We present an AFT generation tool-chain that facilitates this task using partial Fault and Attack Trees that are either manually created or mined from vulnerability databases. We semi-automatically create two system models that provide the necessary information to automatically combine these partial Fault and Attack Trees into complete AFTs using graph transformation rules. © 2023, CC BY-NC-ND.

关键词： Trees (mathematics)

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Collaboration And Versioning Framework – A Systematic Top-Down Approach

Collaboration And Versioning Framework – A Systematic Top-D...

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Conference on Model Driven Engineering languages and Systems Companion (MODELS-C)

作者： Jakob Pietron Alexander Raschke Joeri Exelmans Matthias Tichy Institute of Software Engineering and Programming Languages Ulm University Ulm Germany Department of Computer Science University of Antwerp – Flanders Make Antwerp Belgium

CONTEXT: Versioning allows users to efficiently create and evolve artifacts, not only but especially in the domain of model-driven engineering. Due to collaboration tools, the place and time where users jointly work at their artifacts do not play an important role anymore. Objective: We systematically elaborated a classification framework for collaboration and versioning tools. The intention is threefold: First, it should be possible to classify existing approaches. Second, deriving from user goals requirements to be met, and capabilities to be supported by a new tool. Third, given a set of capabilities, highlight which user goals can be achieved. Method: According to Kang and Lee, we systematically elaborated a problem space and a solution space and created mappings between both spaces and their sub-spaces. To demonstrate the applicability, we classified existing VCS like git, Google Docs, and several MDE-specific approaches. Results: The created feature diagram covers 238 features and contains about 87 constraints. Conclusion: The developed framework supports researchers and developers in classifying their tools, revealing new opportunities to improve their tools, and guiding the development of new tools.

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