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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. mcc‏ @mcclure111 Jul 10

      C is a cool programming language where if you want to return a string from a function you have to set up an entire physical-universe human social system for adjudicating who is responsible for freeing it "In order to create a C string, you must first create civilization"

      77 replies 953 retweets 3,618 likes
      Show this thread
    2. Rich Felker‏ @RichFelker Jul 10
      Replying to @mcclure111 @erincandescent

      And most other languages just pretend resources are infinite...

      1 reply 1 retweet 31 likes
    3. Real AI‏ @Luiz0x29A Jul 11
      Replying to @RichFelker @mcclure111 @erincandescent

      C pretends programmer time is infinite, who has time to manage memory, that's real work, aren't computers supposed to automate work ? just buy 2x memory (as per GC theory worst case)

      1 reply 0 retweets 1 like
    4. Enno Boland‏ @Gottox Jul 12
      Replying to @Luiz0x29A @RichFelker and

      There's more to consider than a languages productivity. A GC is a show stopper if you're doing anything with hard real time constraints. And even if you're only running on embedded hardware and can safe 50% RAM, it might be a good idea depending on the circumstances.

      3 replies 0 retweets 1 like
    5. Enno Boland‏ @Gottox Jul 12
      Replying to @Gottox @Luiz0x29A and

      And even if you just want to learn, C hides very few complexity. If you're know what's going on when handling strings, it might prevent some issues with other languages, too.

      2 replies 0 retweets 0 likes
    6. Real AI‏ @Luiz0x29A Jul 12
      Replying to @Gottox @RichFelker and

      really, do you know what's going on? caching out of order execution branch prediction pipelines register renaming expeculative execution memory barriers real hardware is nothing like C v̶i̶r̶t̶u̶a̶l̶ abstract machine compilers hide a lot of things

      2 replies 0 retweets 1 like
      Rich Felker‏ @RichFelker Jul 12
      Replying to @Luiz0x29A @Gottox and

      It's a bug in the hardware if you have to be aware of any of those to write correct programs.

      12:53 PM - 12 Jul 2018
      • 2 Likes
      • Fernando Pelliccioni Real AI
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Real AI‏ @Luiz0x29A Jul 12
          Replying to @RichFelker @Gottox and

          too bad if you mistakenly used undefined behavior

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker Jul 12
          Replying to @Luiz0x29A @Gottox and

          Out of all your list, data races (roughly corresponding to memory barriers) is the only one vaguely relevant to UB. Everything else preserves all behavior of arbitrary userspace asm (except timing) so it necessarily preserves behavior of C.

          2 replies 0 retweets 2 likes
        4. Real AI‏ @Luiz0x29A Jul 12
          Replying to @RichFelker @Gottox and

          out of order execution can also be a problem in some architectures, but they compiler do the right thing , usually

          1 reply 0 retweets 0 likes
        5. Rich Felker‏ @RichFelker Jul 12
          Replying to @Luiz0x29A @Gottox and

          Not sure what you mean. Visibility from other cores? If so that's just redundant with data races/[lack of] memory barriers.

          1 reply 0 retweets 0 likes
        6. Real AI‏ @Luiz0x29A Jul 12
          Replying to @RichFelker @Gottox and

          no, there are cpus that reorder instructions and cause problems if you are not careful in puting NOPs in the correct place they're totally dependent on the compiler creating the correct sequences counting on reordering

          0 replies 0 retweets 0 likes
        7. End of conversation

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