prusti-dev
kani
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prusti-dev | kani | |
---|---|---|
23 | 47 | |
1,446 | 1,824 | |
2.5% | 6.8% | |
8.8 | 9.5 | |
22 days ago | 6 days ago | |
Rust | Rust | |
GNU General Public License v3.0 or later | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
prusti-dev
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Using_Prolog_as_the_AST
> The overall goal would be to figure out classical error conditions like nill pointers deference.
> If I can figure out if a pointer will be nil in some execution branch, there is no reason why a computer cannot do the same.
Note, this is called flow-sensitive typing (also called type narrowing) and I think that typescript does it.
https://en.wikipedia.org/wiki/Flow-sensitive_typing
> I personally would see this as an human race level upgrades. Imagine feeding your code to a CI that spit back something like: "you will have a panic at line 156 when your input is > 4"
A model checker can do that!
See this
https://model-checking.github.io/kani/tutorial-kinds-of-fail...
Other techniques are also possible
https://github.com/viperproject/prusti-dev#quick-example
(Here I could link a lot of things, I just selected two Rust projects to illustrate)
This works better if you are able to provide contracts in your API that says which guarantees you provide. Alternatively, asserts are useful too.
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Programming Languages Going Above and Beyond
You might be interested in the Prusti project, which statically checks for absence of reachable panics, overflows etc. It also allows user-defined specifications such as pre and post-conditions, loop body invariants, termination checking and so on.
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Trying to find a crate that allows you to constrain the value of arguments in various ways via a proc macro
This is called refinement types and prusti might be the project you saw.
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rustc-plugin: A framework for writing plugins that integrate with the Rust compiler
But there's also a lot of exciting work around formal verification like Prusti.
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Is there something like "super-safe" rust?
prusti
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A plan for cybersecurity and grid safety
Efforts: seL4, Project Everest, the Prossimo project of the ISRG, Let's Encrypt, and Prusti for the Rust language
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Prop v0.42 released! Don't panic! The answer is... support for dependent types :)
Wow that sounds really cool! I'm not an expert but does that mean that one day you could implement dependend types or refinement types in Rust as a crate ? I currently only know of tools like: Flux Creusot Kani Prusti
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Prusti: Static Analyzer for Rust
And have it checked at compile time that the assertion holds! Which is a bit like Liquid Haskell in capability: https://ucsd-progsys.github.io/liquidhaskell/
... and now I just noticed that prusti has a crate prusti_contracts that can do the same thing!! https://github.com/viperproject/prusti-dev/blob/master/prust...
Now I'm wondering which tool is more capable (as I understand, they leverage a SMT solver like Z3 to discharge the proof obligations, right?)
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Six programming languages I’d like to see
For contract-based programming, I'm personally planning on experimenting with https://github.com/viperproject/prusti-dev
The withdraw example would look something like
impl Account {
kani
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The C Bounded Model Checker: Criminally Underused
This is also the backend for Kani - Amazon's formal verification tool for Rust.
- Boletín AWS Open Source, Christmas Edition
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The Wizardry Frontier
Nice read! Rust has pushed, and will continue to push, the limits of practical, bare metal, memory safe languages. And it's interesting to think about what's next, maybe eventually there will be some form of practical theorem proving "for the masses". Lean 4 looks great and has potential, but it's still mostly a language for mathematicians. There has been some research on AI constructed proofs, which could be the best of both worlds because then the type checker can verify that the AI generated code/proof is indeed correct. Tools like Kani are also a step forward in program correctness.
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CVE-2023-4863: Heap buffer overflow in WebP (Chrome)
> those applications need the proof for correctness so that more dangerous code---say, what would need `unsafe` in Rust---can be safely added
There are actually already tools built for this very purpose in Rust (see Kani [1] for instance).
Formal verification has a serious scaling problem, so forming programs in such a way that there are a few performance-critical areas that use unsafe routines seems like the best route. I feel like Rust leans into this paradigm with `unsafe` blocks.
- Formal verification for unsafe code?
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Unsafe Rust
You can also use Kani to check unsafe code. https://github.com/model-checking/kani
- This Week in Rust 499
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Kani 0.28.0 has been released!
Here's a summary of what's new in version 0.28.0:
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Kani 0.27.0 has been released!
However, there may be more down the line since we don't have (1) for now. If you're interested, would you mind commenting to this issue?
We're excited to announce the release of Kani Rust Verifier v0.27.0! Kani is a bit-precise model checker for Rust, and this new release comes with exciting changes and improvements.
What are some alternatives?
MIRAI - Rust mid-level IR Abstract Interpreter
awesome-rust-formalized-reasoning - An exhaustive list of all Rust resources regarding automated or semi-automated formalization efforts in any area, constructive mathematics, formal algorithms, and program verification.
Rudra - Rust Memory Safety & Undefined Behavior Detection
tectonic - A modernized, complete, self-contained TeX/LaTeX engine, powered by XeTeX and TeXLive.
automem - C++-style automatic memory management smart pointers for D
gdbstub - An ergonomic, featureful, and easy-to-integrate implementation of the GDB Remote Serial Protocol in Rust (with no-compromises #![no_std] support)
rmc - Kani Rust Verifier [Moved to: https://github.com/model-checking/kani]
rustig - A tool to detect code paths leading to Rust's panic handler
watt - Runtime for executing procedural macros as WebAssembly
rust - Empowering everyone to build reliable and efficient software.
magmide - A dependently-typed proof language intended to make provably correct bare metal code possible for working software engineers.