IMUtility
buddy_alloc
IMUtility | buddy_alloc | |
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5 | 7 | |
32 | 121 | |
- | - | |
7.4 | 7.3 | |
27 days ago | about 1 month ago | |
C | C | |
BSD 3-clause "New" or "Revised" License | BSD Zero Clause License |
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IMUtility
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An open-source project that aims to comply with safety-critical requirements
Does anyone know of a small or medium-sized open-source project that would be interested in adapting its code to comply with safety-critical standards? Our project, https://github.com/IMProject/IMUtility, would like to port all reusable code as a utility so it could be added as a submodule. We also offer assistance in integrating ECALIER into the project.
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Running MISRA-C analysis tool.
You can take look at how we integrated MISRA C 2012 from cppcheck. We also have ECLAIR but it is not free. https://github.com/IMProject/IMUtility
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What should I look for in a Master's Degree for Embedded Systems?
You can join our project at https://github.com/IMProject/IMUtility and write a master's thesis in which you compare the latency and memory usage of algorithms written in compliance with the MISRA coding standard versus those that are not. I would expect non-MISRA algorithms to be more optimized, but nobody really knows the answer since no one has yet conducted such a comparison. This could open doors for you at all automotive companies in Germany. ;)
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Examples of excellently-written projects.
Link to project: https://github.com/IMProject/IMUtility
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Open-source MISRA-compliant projects
We started this small Utility code https://github.com/IMProject/IMUtility and we make sure we set up cppchecker for MISRA C 2012. Soon we get contacted by Bugseng and get the offer to integrate ECLAIR so we did it. Since ECLAIR is certificated we can tell that our open-source project is checked with a certified tool and this can maybe help some startups that don't have the money at the beginning of journey to pay for all development.
buddy_alloc
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buddy memory allocator - project update (2 years)
If you need a sub-allocator with predictable performance feel free to give it a try. The code is here and it is licensed under the 0BSD license, making it as lax and as close to public domain as possible. Comments, issues and PRs are always welcomed and appreciated. Thanks!
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Open-source MISRA-compliant projects
I maintain a project that's not technically MISRA compliant (due to being a memory allocator and MISRA disallowing the very idea) and I keep it at 100% test coverage with support for multiple compilers and operating systems. Over time I had a few users reporting back - since it's working for them I count that as success. Is it wildly popular ? Of course not, but it doesn't have to be.
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One year ago I wrote a buddy memory allocator - project update
You are right about the tests - they are written with 64-bit in mind. I ought to rework them to switch sizes based on arch but that will take a weekend. I've filed https://github.com/spaskalev/buddy_alloc/issues/19 to track this.
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is there some good tutorial about how malloc or mcheck works?
I also maintain a application-based malloc (that doesn't do obtaining and releasing memory through the OS, just managing sub-diving a larger memory block into smaller requests) at https://github.com/spaskalev/buddy_alloc - feel free to ping me with any questions about it.
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I'm giving out microgrants to open source projects for the third year in a row! Brag about your projects here so I can see them, big or small!
I'm the author of https://github.com/spaskalev/buddy_alloc - a custom memory allocator for C (modern C11, works with C++ as well) designed for predictable and repeatable performance. It is suitable for use in embedded, games and any other system with soft or hard real-time demands. It has 100% line and branch test coverage and uses a fixed amount of space on the call stack when called. Recently the project had its first external contribution as well. Cheers!
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What is your own favorite C project?
I made a memory allocator that turned out rather neat - https://github.com/spaskalev/buddy_alloc
What are some alternatives?
pim - Source code for the book: Patterns in the Machine: A Software Engineering Guide to Embedded Development
rpmalloc - Public domain cross platform lock free thread caching 16-byte aligned memory allocator implemented in C
Melon - A generic cross-platform C library that includes many commonly used components and frameworks, and a new scripting language interpreter. It currently supports C99 and Aspect-Oriented Programming (AOP).
VulkanMemoryAllocator - Easy to integrate Vulkan memory allocation library
cFS - The Core Flight System (cFS)
isoalloc - A general purpose memory allocator that implements an isolation security strategy to mitigate memory safety issues while maintaining good performance
IMBootloader - Safety-Critical bootloader, written by following MISRA guidelines
gunslinger - C99, header-only framework for games and multimedia applications
rotate - [WIP] static typed programming language that compiles to vm bytecode
microui - A tiny immediate-mode UI library
gb - gb single-file public domain libraries for C & C++
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.