Building a GNAT SAS analysis pipeline on GitLab

This is the first part of a series in which we’ll implement a GNAT SAS analysis pipeline for Ada code on GitLab by making use of GNAT SAS 24 new features. We are focusing on getting a pipeline that "Just Works(tm)", leaving more advanced issues such as scalability, improvement of user experience, or maintainability for later.

#Docker    #GitLab    #CodePeer    #DevOps    #GNAT SAS   

Memory Safety in Ada and SPARK through Language Features and Tool Support

This blog post describes how Ada and SPARK provide memory safety through a combination of language features, run-time checks, and static and dynamic analysis tools.

#memory safety    #safe programming languages    #Ada    #SPARK   

An Introduction to Memory Safety Concepts and Challenges

This blog post explains the concept of memory safety and the most common memory errors. Then, it introduces three memory-safe languages that have built-in countermeasures against memory errors.

#Programming     #memory safety    #memory bugs    #Ada    #SPARK    #Rust   

Announcing Ada binding to the wolfSSL library

Today, we at wolfSSL (https://www.wolfssl.com/) are happy to announce the availability of an Ada/SPARK binding that enables Ada applications to use post-quantum TLS 1.3 encryption through the wolfSSL embedded SSL/TLS library. The wolfSSL library is thread safe by design. Multiple threads can enter the library simultaneously without creating conflicts because wolfSSL avoids global data, static data, and the sharing of objects. When objects are used in the API the wolfSSL library provides opaque pointers to objects whose contents is only known internally by the wolfSSL library. This library interface design makes it easy to make bindings to other programming languages and at the same time enables the contents of the objects used internally to be highly configurable.

#wolfSSL   

A little bit of Photoshop® using GNAT for CUDA®

Today I want to go over some internal mechanisms of a Photoshop-like application to better illustrate an up-and-coming tech, GNAT for CUDA®, developed at AdaCore.

#CUDA    #GNAT Pro    #Photoshop    #GPU    #Ada    #AdaCore    #NVIDIA    #GPGPU    #Computer Vision    #Image Analysis    #Bilateral Filter    #Signal Processing    #parallel computing    #Surface Blur    #Image Processing   

Bare-metal C++ development environment for certifiable safety-critical applications

We are happy to announce the availability of GNAT Pro for C++, a versatile development environment for bare-metal targets capable of supporting different subsets of the C++ language. It constitutes the best choice for safety-critical bare-metal systems that want to reduce complexity, memory footprint and execution-time overhead, paving the way to software certification. GNAT Pro for C++ targets popular hardware in the avionics, defense, railway, and space domains: PowerPC (32 bits), x86 (64 bits), RISC-V (32/64 bits), LEON3 (32 bits) and ARM (32/64 bits).

#C++    #Safety Critical Development    #Certification    #Bare-metal   

Identifying and authorizing users at AdaCore

Back in the 90s when AdaCore was founded, the state of IT security was very different. A unique Unix login and password were enough to connect to a shared server and run business applications. Most of the protocols used were still unencrypted, and the most elaborate access controls were based on Unix groups and perimeter defense. As the company evolved, we gave users access to more and more services, some not hosted on-premise. More services meant distinct credentials. Security-savvy users, who did not accept reusing the same password everywhere, had the burden of maintaining all these distinct credentials. Most credentials were long-lived, and very often shared. Also as the notion of perimeter defense became more and more fuzzy with the introduction of PaaS, IaaS, .. the need for safer access and communication protocols increased significantly.

#DevOps    #Security   

Extending Priority Inheritance Beyond Protected Operations

This blog entry shows how to define protected types that extend the language-defined priority inheritance for protected actions to the statements outside those protected actions. We create a mutex type for illustration.

#Ada    #Protected Types    #Priority Inheritance   

VSS: Cursors, Iterators and Markers

The VSS (as an abbre­vi­a­tion for Vir­tu­al String Sub­sys­tem) library is designed to pro­vide advanced string and text pro­cess­ing capa­bil­i­ties. It offers a con­ve­nient and robust API that allows devel­op­ers to work with Uni­code text, regard­less of its inter­nal rep­re­sen­ta­tion. Last time we provided overview of the library, and in this arti­cle, we will introduce concepts of cursors that are used to iterate, retrieve, and modify text data.

#vss    #Unicode    #strings    #Libraries   

SPARK, Beyond Normal Termination

When teaching SPARK to my students, I generally explain the central position of contracts in formal verification in the following way: Contracts of subprograms summarize their behavior - preconditions constrain their inputs, while postconditions describe their effects. It is an easy way to see contracts, However, not returning normally, for example looping forever or raising exceptions, is definitely a significant effect of a subprogram. Modeling that effect would be beneficial because if it occurs in an unexpected way it might cause the entire program to derail. Release 24.0 of SPARK includes contracts that can be used to reason about subprograms which do not return normally. This blog post describes them.

#SPARK