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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    Patrick Walton‏ @pcwalton 26 Nov 2017
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    I think that kernel-space Rust would mostly benefit drivers (which, not coincidentally, are most in need of help re. security and correctness).

    5:45 PM - 26 Nov 2017
    • 5 Retweets
    • 80 Likes
    • Noob sai Noah Collins Michael B Kevin Swiber Scott Duensing Stefan Boberg sigh- o na. kaosat_dev Mischan Toosarani-Hausberger jameschurchman
    5 replies 5 retweets 80 likes
      1. Patrick Walton‏ @pcwalton 26 Nov 2017
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        There's a legitimate debate as to how much Rust would benefit the core memory manager, scheduler, etc. But the benefits to drivers are obvious.

        2 replies 0 retweets 24 likes
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      2. Reilly Grant → @reillyeon@toot.cafe‏ @reillyeon 26 Nov 2017
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        Replying to @pcwalton

        Drivers are one area of attack but I'd also look at the kernel/user-space interface. Could Rust's type system be used to check that the kernel is accessing user pointers in a safe way?

        1 reply 0 retweets 3 likes
      3. Patrick Walton‏ @pcwalton 27 Nov 2017
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        Replying to @reillyeon

        Yes, I’m pretty sure it could, and that’s a really good point.

        0 replies 0 retweets 0 likes
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      1. Manish‏ @ManishEarth 26 Nov 2017
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        Replying to @pcwalton

        Reminds me of @qDot's vision of all Firefox hardware code being in Rust

        0 replies 0 retweets 5 likes
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      1. Reilly Grant → @reillyeon@toot.cafe‏ @reillyeon 26 Nov 2017
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        Replying to @pcwalton

        I'd pull up the spec for a common controller interface like xHCI or AHCI and think about how you'd write a driver for that in Rust. I'm curious what kinds of primitives you'd build for manipulating what is essentially a shared memory data structure.

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      2.  ⚛ 𝘼𝙩𝙤𝙢 𝘼𝙜𝙚 𝙊𝙘𝙩𝙤𝙥𝙪𝙨  ⚛‏ @OhMeadhbh 26 Nov 2017
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        Replying to @pcwalton

        fwiw, i wrote a scheduler + message passing interface w/ rust to teach myself how to code in it. i would love to see someone who knew what they were doing do Rust/L4.

        1 reply 0 retweets 2 likes
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      2. W. Brian Gourlie‏ @dubya_brian 26 Nov 2017
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        Replying to @jhripley @pcwalton

        I've never written any unsafe code, so a legitimate question: How inconvenient does rust make it to write unsafe code? Are there things beyond putting code in an unsafe block that get in the way?

        1 reply 0 retweets 0 likes
      3. Matthias‏ @Madseee 26 Nov 2017
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        Replying to @dubya_brian @jhripley @pcwalton

        I wouldn't say inconvenient - rather that it makes you uncomfortable about having it in your src and rethink your code structure. Personally, i have yet to write unsafe code which i didn't replace with safe before shipping (except for bindings)

        0 replies 0 retweets 0 likes
      4. End of conversation

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