lineiform
cargo-mutants
lineiform | cargo-mutants | |
---|---|---|
8 | 8 | |
155 | 445 | |
- | - | |
0.0 | 9.7 | |
about 1 year ago | 7 days ago | |
Rust | Rust | |
- | MIT License |
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.
lineiform
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JITting functions in Rust for runtime performance flexibility
Sounds similar to lineiform. Which isn't all that stable or actively developed, but it is a cute approach to writing a meta-jit in rust. It's a weird approach, but IMO it's worth more experimentation.
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What’s everyone working on this week (9/2022)?
Working on Lineiform, my meta-JIT library, some more.
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Lineiform, a meta-JIT library for Rust interpreters
In response to Cranelift, switching to my own Tangle IR won't be using Cranelift at all (it uses raw dynasm-rs for emitting instructions). I go into a bit in https://github.com/chc4/lineiform/issues/19, but Cranelift specifically has some rules about iflags, the type they use to conceptualize processor flags effects (e.g. add's carryout or overflow). You can only have one iflags value live at a time, and it can't overlap with any other math operation. This is a problem because the x86 we're lifting doesn't always follow that rule, so if we just emit Cranelift as we go it will panic and say we built an invalid function.
I go into a bit in https://github.com/chc4/lineiform/issues/19, but it's less a problem with its optimizer and more a problem with its IR constraints. Cranelift specifically has some rules about `iflags`, the type they use to conceptualize processor flags effects (e.g. add's carryout or overflow). You can only have one `iflags` value live at a time, and it can't overlap with any other math operation. This is a problem because the x86 we're lifting doesn't always follow that rule, so if we just emit Cranelift as we go it will panic and say we built an invalid function.
The iflags design in general is kinda awkward too, and was being rethought a few months ago when I was first getting this working; I think they're planning on redesigning the add carryout interface and things to be slightly more streamlined. I suspect that any redesigned interface will have similar problems with mismatch between what I want from Cranelift and what 90% of other uses of Cranelfit want, though, and so I decided to just make my own IR instead.
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What's everyone working on this week (3/2022)?
Working on the codegen backend for Lineiform again. I sketched out a plan on how to implement register allocation in a way that hopefully doesn't have horrible behavior in the majority of cases, and implemented ~half of it last week, and hopefully I'll implement the other half and instruction scheduling this week.
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HN: == Happy New Year HN == (What is your “plans” for the new year?)
Yup, https://github.com/chc4/lineiform. It's not usable at all yet - I was building it on top of Cranelift, which turned out to be a fairly bad idea, so I'm going to have to essentially rewrite all of it with my own codegen backend I think. I've been hacking on it on and off but it's been much slower progress due to work (and writing a codegen backend is hard...)
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What's everyone working on this week (32/2021)?
I got struck by either a very dumb or very good idea a few days ago, and finally have a working (minimal) proof-of-concept for it: Lineiform is a meta-JIT library to nearly automatically get an optimizing method JIT from a Rust interpreter. It does dynamic recompilation on closures by lifting from x86 to Cranelift IR for runtime function inlining and constant propagation.
cargo-mutants
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Distcc: A fast, free distributed C/C++ compiler
Hi Rusty!
For a later hack in the same vein, check out https://github.com/sourcefrog/cargo-mutants
- cargo-mutants 0.2.9 finds poorly-tested code faster
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What's everyone working on this week (13/2022)?
cargo-mutants got a couple of releases over the weekend, fixing some environment-triggered bugs on Windows and Linux ecryptfs, and adding a better overall progress indicator (demo: https://asciinema.org/a/481375). It is getting better at avoiding uninteresting or pointless mutations, although there's a lot more to do there, and at printing function name paths well.
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What’s everyone working on this week (9/2022)?
While working on Conserve and cargo-mutants I felt that existing Rust progress-bar libraries like Indicatif didn't give me enough control of how the bar was drawn, or at least I was working around them to insert my own text. For example, I wanted to draw several counters into a single line, and it seems like the only way to do that is to just push in a text string.
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What's everyone working on this week (7/2022)?
Continuing with some fast-follow enhancements in cargo-mutants in response to user feedback: for example doctests are typically slow and in some trees not important for coverage, so you can now skip them.
- cargo-mutants 0.2: a new mutation testing tool
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What's everyone working on this week (6/2022)?
I got cargo-mutants to a state where I felt I could announce it and ask for public feedback.
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