How Safe Is Zig?

• lru-rs

  3 586 6.7 Rust

  An implementation of a LRU cache

You didn't seem to click the commit the guy linked with the rust code https://github.com/jeromefroe/lru-rs/pull/121/commits/416a2d...

It has nothing to do with opting out. Zig, Rust and no language saves you when you write incorrect unsafe code. My original point is disqualifying c tools is misleading and everything suffers from incorrect unsafe code

• pure

  3 233 10.0 C

  A static analysis file format checker. (by ronomon)

  

Wow, that's saying something!

The tool is called Pure [1]. It was originally written in JavaScript and open-sourced, then rewritten for Microsoft in C (running sandboxed) after it detected David Fifield's “A Better Zip Bomb” as a zero day.

I'd love to rewrite it in Zig some day to benefit from the checked arithmetic, explicit control flow and spatial safety—there are no temporal issues for this domain since it's all run-to-completion single threaded.

Got to admit I'm a little embarrassed it's still in C!

[1] https://github.com/ronomon/pure

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• rust

  2,681 92,831 10.0 Rust

  Empowering everyone to build reliable and efficient software.

  

The headline feature of rustc memory management is the use of arenas: https://github.com/rust-lang/rust/blob/10f4ce324baf7cfb7ce2b...

    //! The arena, a fast but limited type of allocator.

• zig

  816 30,295 10.0 Zig

  General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.

  

• zorrow

  2 92 10.0 Zig

  Borrowchecker in Zig

Somebody implemented part of it in the past, but it was based on the ability to observe the order of execution of comptime blocks, which is going to be removed from the language (probably already is).

https://github.com/DutchGhost/zorrow

It's not a complete solution, among other things, because it only works if you use it to access variables, as the language has no way of forcing you.

• stable_deref_trait

  4 29 1.2 Rust

  Unsafe marker trait for types that deref to a stable address

Unsafe Rust is an esoteric language without iron-clad guarantees, and type-level programming and async Rust is an esoteric metalanguage (https://hirrolot.github.io/posts/rust-is-hard-or-the-misery-...). For example, matklad made a recent blog post on "Caches In Rust" (https://matklad.github.io/2022/06/11/caches-in-rust.html). The cache is built around https://docs.rs/elsa, which is built around https://docs.rs/stable_deref_trait/latest/stable_deref_trait..., which is unsound for Box and violates stacked borrows: https://github.com/Storyyeller/stable_deref_trait/issues/15

There is a recurring trend of sound C programs turning into unsound Rust programs, because shared mutability is often necessary but it's difficult to avoid creating &mut, and Stacked Borrows places strict conditions on constructing &mut T (they invalidate some but not all aliasing *const T).

• tigerbeetle

  37 1,012 9.5 Zig

  Discontinued A distributed financial accounting database designed for mission critical safety and performance. [Moved to: https://github.com/tigerbeetledb/tigerbeetle] (by coilhq)

  

It's a pleasure. Let me know if you have any more questions about TigerBeetle. Our design doc is also here: https://github.com/coilhq/tigerbeetle/blob/main/docs/DESIGN....

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