[Webkit-unassigned] [Bug 72155] Replace Qt QThread threading back-end with pthread/Win32 threading back-ends

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72155


Simon Hausmann <hausmann at webkit.org> changed:

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                 CC|                            |hausmann at webkit.org




--- Comment #2 from Simon Hausmann <hausmann at webkit.org>  2011-11-14 07:57:21 PST ---
(In reply to comment #0)
> WebWorker QThreads can outlive the QApplication instance, and even various internal Qt global static state. This leads to random SEGVs and hangs on application exit. Moving away from ThreadingQt QThread back-end to use ThreadingPthreads or ThreadingWin helps to avoid this and reduce maintenance due to more code shared with the other platforms.
> 
> See bug 71718 for a valgrind/helgrind log showing the problem, and a discussion of using POSIX/Win32 threads instead of QThreads.

I like the idea of more code sharing and while introducing the pthreads dependency on windows is painful, I clearly see benefits. But I'm curious about the web workers:

Could you elaborate a bit how it is possible that web workers can outlive the QApplication instance? It doesn't sound like something "intentional" to me, but I might easily be missing something :)

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