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. Alexander Cherepanov‏ @ch3root 19 Oct 2015

      sizeof overflow -- well defined or UB? sizeof(int[(0, SIZE_MAX / sizeof(int) + 1)]) == 0

      2 replies 1 retweet 2 likes
    2. Alexander Cherepanov‏ @ch3root 27 Oct 2015
      Replying to @ch3root

      Alexander Cherepanov Retweeted CopperheadOS

      IMO sizeof overflow is UB per C11 6.5p5 Rel'd: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68065 … https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68107 … Partially inspired byhttps://twitter.com/CopperheadSec/status/656946446239797248 …

      Alexander Cherepanov added,

      CopperheadOS @CopperheadOS
      Replying to @ch3root
      @ch3root You might be interested in the bug I filed some time ago for Rust when I was working on it: https://github.com/rust-lang/rust/issues/17913 ….
      2 replies 0 retweets 3 likes
    3. Rich Felker‏ @RichFelker 27 Oct 2015
      Replying to @ch3root

      @ch3root That's a potentially valid interpretation, but unusably bad QoI issue, just like ptrdiff_t overflows.

      1 reply 0 retweets 0 likes
    4. Alexander Cherepanov‏ @ch3root 27 Oct 2015
      Replying to @RichFelker

      @RichFelker size_t size = SIZE_MAX / sizeof(int) + 2; int (*p)[size]; p = malloc(sizeof *p); What should the code do? Crash in line 2?

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 27 Oct 2015
      Replying to @ch3root

      @ch3root Something like that. VLAs are problematic in a lot of ways. Nice that you pointed out that pointer-to-VLA is problematic too.

      8:40 AM - 27 Oct 2015
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Alexander Cherepanov‏ @ch3root 27 Oct 2015
          Replying to @RichFelker

          @RichFelker It's surely preferable to state directly in std that objects with size > SIZE_MAX are UB (if it's indeed intended:-).

          1 reply 0 retweets 0 likes
        3. Alexander Cherepanov‏ @ch3root 27 Oct 2015
          Replying to @ch3root

          @RichFelker But it's not there yet. UB in sizeof overflow means dynamic oversized VLAs are effectively prohibited.

          2 replies 0 retweets 0 likes
        4. Alexander Cherepanov‏ @ch3root 27 Oct 2015
          Replying to @ch3root

          @RichFelker OTOH huge objects in stack are a problem irrespective of VLA.

          1 reply 0 retweets 0 likes
        5. CopperheadOS‏ @CopperheadOS 27 Oct 2015
          Replying to @ch3root

          @ch3root @RichFelker -fstack-check should work properly, have no significant performance overhead and be enabled by default though.

          1 reply 0 retweets 0 likes
        6. CopperheadOS‏ @CopperheadOS 27 Oct 2015
          Replying to @CopperheadOS

          @ch3root @RichFelker Microsoft solved that potentially uncaught stack overflow problem a long time ago and it should be solved here too.

          1 reply 0 retweets 0 likes
        7. CopperheadOS‏ @CopperheadOS 27 Oct 2015
          Replying to @CopperheadOS

          @ch3root @RichFelker An amusing side issue is that Clang performs the Windows stack checking but implements -fstack-check as a no-op.

          0 replies 0 retweets 1 like
        8. 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