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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 3 Sep 2019
    • Report Tweet
    • Report NetzDG Violation

    Patrick Walton Retweeted Andrew McCreight

    Periodic reminder that there are sites out there that depend on JS stack overflows happening and will hang if the stack doesn’t overflow in a timely mannerhttps://twitter.com/amccreight/status/1169015581602979844 …

    Patrick Walton added,

    Andrew McCreight @amccreight
    Replying to @antumbral @kripken
    In Firefox, we see perf issues on some sites when the stack size is too big. https://bugzilla.mozilla.org/show_bug.cgi?id=1578350 …
    3:49 PM - 3 Sep 2019
    • 111 Retweets
    • 313 Likes
    • Michael Jendrusch Florian Bender Michael Hay Peeyush Kushwaha crimes Vilem might have a-prepare-fication curl | sudo bash Tim Cook's apple
    20 replies 111 retweets 313 likes
      1. New conversation
      2. John Regehr‏ @johnregehr 3 Sep 2019
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        Replying to @pcwalton

        this is a special case of the general rule that given enough users, every behavior will become depended upon also see 6502 "unintended opcodes" http://hitmen.c02.at/files/docs/c64/NoMoreSecrets-NMOS6510UnintendedOpcodes-20162412.pdf …

        2 replies 5 retweets 32 likes
      3. LukÄç.jpg.exe‏ @boondaburrah 3 Sep 2019
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        Replying to @johnregehr @pcwalton

        I wonder how many of these work on the 65816 or if they were 'fixed'

        1 reply 0 retweets 1 like
      4. 2 more replies
      1. New conversation
      2. Rich Felker‏ @RichFelker 3 Sep 2019
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        Replying to @pcwalton

        Sites that depend on, or junk being pulled in because of ads/trackers/other unwanted crap?

        1 reply 0 retweets 4 likes
      3. Rich Felker‏ @RichFelker 3 Sep 2019
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        Replying to @RichFelker @pcwalton

        Also, let me guess, they hang because these are native calls thanks to JIT hell, whereas with a reasonable interpreter control would return to browser after a fixed number of interpreter steps...

        2 replies 1 retweet 3 likes
      4. 3 more replies
      1. New conversation
      2. James‏ @astrocrash 3 Sep 2019
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        Replying to @pcwalton

        pic.twitter.com/4D45Z4ewu4

        2 replies 6 retweets 44 likes
      3. lil individual contributor‏ @debitexpenses 3 Sep 2019
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        Replying to @astrocrash

        Crediting the artist:https://xkcd.com/1172/ 

        0 replies 0 retweets 25 likes
      4. End of conversation
      1. Andy Wingo‏ @andywingo 4 Sep 2019
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        Replying to @pcwalton

        i would click on the heart but it is labelled "like" and i definitely do not like

        0 replies 1 retweet 8 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Wes‏ @weskerfoot 3 Sep 2019
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        Replying to @pcwalton

        Is this just because of recursion or is it that they are somehow generating that many nested function calls that it overflows somehow? Would proper tail call elimination actually help, or just mask the problem?

        2 replies 0 retweets 1 like
      3. Erik sixfeetapart Harrison‏ @erikharrison 3 Sep 2019
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        Replying to @weskerfoot @pcwalton

        See bug for references but at least one example was a copy protection scheme on games that overflows the stack to make the debugger unusable.

        0 replies 1 retweet 7 likes
      4. End of conversation
      1. New conversation
      2. Joey Watts‏ @joeywatts96 3 Sep 2019
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        Replying to @pcwalton

        😫

        1 reply 0 retweets 0 likes
      3. Joey Watts‏ @joeywatts96 3 Sep 2019
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        Replying to @joeywatts96 @pcwalton

        "With a sufficient number of users of an API, it does not matter what you promise in the contract: all observable behaviors of your system will be depended on by somebody." Hyrum's law, it really is true... http://www.hyrumslaw.com 

        0 replies 1 retweet 9 likes
      4. End of conversation

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