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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Rich Felker‏ @RichFelker 29 Dec 2016
      Replying to @RichFelker @CopperheadOS

      Most unsafety comes from doing backwards things you shouldn't even be doing in modern C.

      2 replies 0 retweets 1 like
    2. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @RichFelker

      Use-after-free, double-free, out-of-bounds accesses, etc. happen in every C codebase, even with extreme diligence like SQLite.

      2 replies 0 retweets 1 like
    3. Rich Felker‏ @RichFelker 29 Dec 2016
      Replying to @CopperheadOS

      Use-after-free and double-free shouldn't be able to happen unless you're doing really bad things.

      1 reply 0 retweets 0 likes
    4. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @RichFelker

      They do happen in all real world C projects of non-trivial size though. Even when abstracting most forms of lifetime management.

      2 replies 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 29 Dec 2016
      Replying to @CopperheadOS

      You either use single-owner/single-reference, or refcounting. Anything else is idiotic.

      1 reply 0 retweets 1 like
    6. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @RichFelker

      Or you use a language like Rust permitting you to do stuff like allocation-free parsing via lots of lightweight safe references.

      1 reply 0 retweets 0 likes
    7. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @CopperheadOS @RichFelker

      It's fine if the compiler tracks the origin of the lifetimes and enforces it. People use C for performance so they will do more.

      1 reply 0 retweets 0 likes
    8. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @CopperheadOS @RichFelker

      Reference counting can also be done wrong. The Linux kernel gets it wrong all over the place even when reusing code for it.

      2 replies 0 retweets 0 likes
    9. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @CopperheadOS @RichFelker

      Tools really need to enforce the correct way of doing things. Can have the option of defining new correct mechanisms though.

      1 reply 0 retweets 0 likes
    10. CopperheadOS‏ @CopperheadOS 29 Dec 2016
      Replying to @CopperheadOS @RichFelker

      People simply aren't going to get it right without it being enforced. Even if it's a single person and they are really trying.

      2 replies 0 retweets 1 like
      Rich Felker‏ @RichFelker 29 Dec 2016
      Replying to @CopperheadOS

      I agree. This is why viable rules need to be statically checkable.

      9:51 AM - 29 Dec 2016
      • 1 Like
      • CopperheadOS
      0 replies 0 retweets 1 like

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