[Webkit-unassigned] [Bug 71718] Apparent threading bug causes intermittent segfaults
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Wed Nov 9 08:58:15 PST 2011
https://bugs.webkit.org/show_bug.cgi?id=71718
--- Comment #6 from Andrew Wason <rectalogic at rectalogic.com> 2011-11-09 08:58:15 PST ---
Created an attachment (id=114296)
--> (https://bugs.webkit.org/attachment.cgi?id=114296&action=review)
helgrind log
This is the tail end of a valgrind helgrind log during a crash.
The WebWorker QThreads can outlive the QApplication instance, and even various Qt global static state. In this case the global static Qt internal global_callback_table() is being destroyed while outstanding QThreads are accessing it as part of their shutdown.
Allowing the QThreads to outlive QApplication seems like a problem. Perhaps we should QThread::wait for the threads in QCoreApplication::aboutToQuit?
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