The clanguage does not have a specific Boolean type: Boolean values are encoded with integers. This is also true for enumerated types, that may be freely and silently cast to and from integers. On the other hand, ver...
详细信息
The clanguage does not have a specific Boolean type: Boolean values are encoded with integers. This is also true for enumerated types, that may be freely and silently cast to and from integers. On the other hand, verification tools aiming at inferring the possible values of variables at each program point may benefit from the information that some (integer) variables are used solely as Boolean or enumerated type variables, or more generally as finite type variables with a small domain. Indeed, specialized and efficient symbolic representations such as BDDs may be used for representing properties on such variables, whereas approximated representations like intervals and octagons are better suited to larger domain integers and floating-points variables. Driven by this motivation, this paper proposes a static analysis for inferring more precise types for the variables of a c program, corresponding to their effective use. The analysis addresses a subset of the c99 language, including pointers, structures and dynamic allocation.
The article discusses the security in c programming language. critics claim that the decades-old c programming language is inherently insecure. The author disagrees. Programmers just have to use security tools to fix ...
详细信息
The article discusses the security in c programming language. critics claim that the decades-old c programming language is inherently insecure. The author disagrees. Programmers just have to use security tools to fix software *** in recent years has identified the root cause of many of the vulnerabilities typically found in c/c++ code. coding standards such as the cERT c Secure coding Standard help programmers avoid the associated pitfalls. However, without automated tools to check for non-compliance, it is, arguably, more or less impossible for a programmer to deliver fault-free code. Software analysis tools for staticcode analysis are available to enforce compliance with the guidelines recommended by these established coding standards. They can perform in-depth, systemwide analysis of the code, and can utilise formal methods to ensure that system security is not compromised. Software tools enforce compliance with the guidelines recommended by established coding standards.
The paper presents the use of the Red Pitaya development system in a secondary vocational education programme for electrical engineering. In the introduction, the Red Pitaya hardware and software are shortly described...
详细信息
The paper presents the use of the Red Pitaya development system in a secondary vocational education programme for electrical engineering. In the introduction, the Red Pitaya hardware and software are shortly described. In part one, integration of Red Pitaya into a school computer network and ways of accessing the command on Red Pitaya using SSH are shown. Red Pitaya can be used as a measuring system and can replace certain measuring instruments, such as oscilloscope, spectrum analyser, LcR metre and signal generator. The focus of the paper is on operation of a free-access web app of a signal generator and oscilloscope as well as development of own apps in the c programming language for Red Pitaya, such as LED-diode pulsation in the Red Pitaya development system, activation of a LED diode in Red Pitaya using an external button, measuring of an analogue voltage at slow analogue outputs and setting of an analogue voltage at slow analogue outputs. An insight is given in the development of own app for measuring the characteristics of the semiconductor elements like a diode, bipolar transistor and MOS FET transistor. The characteristics are measured at several phases, such as conception and setting-up a measuring system, development of the programme code in the c programming language, transfer of the programme to Red Pitaya, execution of the programme and processing of the measurement results in the diagram drawing-software gnuplot.
In modern industrial applications there is a great need for reliable regulators that satisfy many different system requirements. This paper addresses the problem of using Dc electrical motors to drive both linear and ...
详细信息
In modern industrial applications there is a great need for reliable regulators that satisfy many different system requirements. This paper addresses the problem of using Dc electrical motors to drive both linear and non-linear mechanical loads using a PID regulator. A graphical interface has also been developed, to present the results and confirm the system's reliability.
contents include Graphs and Linear Algebra The GraphBLAS API and Adjacency Matrices GraphBLAS Operations Pygraphblas and modifying the behavior of operations Graph Algorithms expressed with GraphBLAS, Breadth-First Tr...
详细信息
contents include Graphs and Linear Algebra The GraphBLAS API and Adjacency Matrices GraphBLAS Operations Pygraphblas and modifying the behavior of operations Graph Algorithms expressed with GraphBLAS, Breadth-First Traversal, connected components.
Rust is a programminglanguage that simultaneously offers high performance and strong security guarantees. However, these guarantees come at the cost of strict compiler checks that sometimes prevent necessary code pat...
详细信息
Rust is a programminglanguage that simultaneously offers high performance and strong security guarantees. However, these guarantees come at the cost of strict compiler checks that sometimes prevent necessary code patterns. The unsafe keyword allows developers to bypass these compiler checks, and is used in both pure Rust and mixed-language applications. But the use of unsafe undermines the security guarantees of Rust that make it an attractive option in the first *** first demonstrate that within a real-world pure Rust application, many uses of unsafe can be eliminated,or reduced to formally verifiable standard libraries. We then present Galeed, a system for isolating and protecting the Rust heap from access by other programminglanguages using Intels Memory Protection Key (MPK) technology. We demonstrate both the effectiveness and efficiency of Galeed on Firefox, a web browser written in Rust and c .
contrary to predictions of its demise, c remains a dominant programminglanguage, especially in embedded systems. Speed and transparency dictate that it will be so for the next decade, despite its supposed unsuitabili...
详细信息
ISBN:
(纸本)9781450320856
contrary to predictions of its demise, c remains a dominant programminglanguage, especially in embedded systems. Speed and transparency dictate that it will be so for the next decade, despite its supposed unsuitability for programming parallel architectures. A flexible compiler development system is a unique vehicle to bend the clanguage and its implementation to the developers' will. Using hard-won experience in applying extended versions of c to diverse parallel architectures, c's potential in the dark ages of multi-core programming is examined.
暂无评论