[Webkit-unassigned] [Bug 248802] [GTK] WebKitWebProcess crashes in JavaScriptCore LinkBuffer::copyCompactAndLinkCode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=248802

--- Comment #8 from John Ralls <jralls at ceridwen.us> ---
(In reply to Michael Catanzaro from comment #7)
> Not sure how to help with this bug. Just wanted to say that WebKitGTK is
> *theoretically* supported on macOS, so you could try to upstream the
> non-hacky portions of your build fixes if you want.

Very little of it is non-hacky because I don't have a deep enough understanding of the code base to do anything but hack. I attached the patches so that someone who does have a better grip on the code could see if I created the problem by doing something dumb.

As for helping, you at least have better knowledge of the code base than I do and more important more contacts with the WebKit team. As I said, I don't even understand why it's crashing: It's a half-gig active allocated memory region into which memcpy wants to write 188 bytes somewhere in the middle. The 188 bytes in the destination are all 0x00. The tail of the address is always 0x4000 so it can't be alignment. Whatever it is it's a problem on aarch64 and not x86_64. What could it be?

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