Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

Tweets

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

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Rich Felker‏ @RichFelker 6 Jul 2016

      Even when C89 was being drafted, there was a concern for ensuring that compilers could optimize based on non-aliasing assumptions.

      1 reply 0 retweets 0 likes
    2. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @RichFelker

      C89 3.3 reads "An object shall have its stored value accessed only by an lvalue that has one of the following types:[28]..."

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @RichFelker

      With footnote 28 as follows: "The intent of this list is to specify those circumstances in which an object may or may not be aliased."

      2 replies 0 retweets 0 likes
    4. friend void‏ @volatile_void 6 Jul 2016
      Replying to @RichFelker

      this doesn't contradict OpenBSD's man page, and I'm not sure what you find funny in it. It says -fstrict-aliasing causes issues…

      2 replies 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @volatile_void

      Did you mean to reply to this thread and not the OpenBSD one?

      1 reply 0 retweets 0 likes
    6. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @RichFelker

      This thread is about the general unawareness that even before C89 there was intent that compilers do non-aliasing-based optimizing

      1 reply 0 retweets 0 likes
    7. friend void‏ @volatile_void 6 Jul 2016
      Replying to @RichFelker

      both. I assumed they were related.

      2 replies 0 retweets 0 likes
    8. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @volatile_void

      Well they are on some level. I just found it ridiculous that OpenBSD is nonchalauntly saying their code needs -fno-strict-aliasing

      2 replies 0 retweets 0 likes
    9. Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @RichFelker

      ..rather than fixing their UB like I'd expect from a secure OS, & just using -fno-strict-aliasing as extra hardening/safety.

      1 reply 0 retweets 0 likes
    10.  🎃 p-zombie Damien Miller‏ @damienmiller 6 Jul 2016
      Replying to @RichFelker

      in other thread I pointed out an example of how the sockets API demands no-strict-aliasing (not just OpenBSD either)

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 6 Jul 2016
      Replying to @damienmiller

      And I've pointed out in multiple threads how that claim is wrong and it's only bad legacy socket code that has probs

      5:49 PM - 6 Jul 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. friend void‏ @volatile_void 6 Jul 2016
          Replying to @RichFelker

          about that, I'm not sure how “treat the structs as opaque” helps the OS implementers that have to provide the functions.

          2 replies 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @volatile_void

          Then let's analyze what's wrong here in musl, if anything, and fix it if so. That should shed light on whether there's an issue.

          1 reply 0 retweets 0 likes
        4. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @RichFelker

          musl's getaddrinfo looks clean/correct here: https://git.musl-libc.org/cgit/musl/tree/src/network/getaddrinfo.c?h=v1.1.15#n64 …

          1 reply 0 retweets 0 likes
        5. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @RichFelker

          musl's getnameinfo probably has one minor sockaddr aliasing error: https://git.musl-libc.org/cgit/musl/tree/src/network/getnameinfo.c?h=v1.1.15#n131 …

          1 reply 0 retweets 0 likes
        6. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @RichFelker

          res_msend may have a tiny issue if bind() were 3rd-party, but since it's ours and just a syscall, it's ok: https://git.musl-libc.org/cgit/musl/tree/src/network/res_msend.c?h=v1.1.15#n71 …

          1 reply 0 retweets 0 likes
        7. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @RichFelker

          And finally getifaddrs may have some sockaddr aliasing issues; I'm not familiar enough with that code to judge immediately.

          1 reply 0 retweets 0 likes
        8. Rich Felker‏ @RichFelker 6 Jul 2016
          Replying to @RichFelker

          Everything else in musl looks clean with respect to struct sockaddr.

          0 replies 0 retweets 0 likes
        9. End of conversation

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info