[Webkit-unassigned] [Bug 234358] [iOS 15] Crash during WebProcessProxy::didClose while writing to NSUserDefaults on another thread

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Dec 20 05:55:10 PST 2021


--- Comment #6 from Ali Juma <ajuma at chromium.org> ---
(In reply to Alexey Proskuryakov from comment #4)
> This offset in WebPageProxy::resetStateAfterProcessTermination corresponds
> to line 7951 in
> https://trac.webkit.org/browser/webkit/tags/Safari-612.
> WebKit/UIProcess/WebPageProxy.cpp
>         pageClient().processDidExit();
> Tracing into what it could be calling, I don't see anything helpful (seems
> like it would be [CATransaction commit] in
> WebViewImpl::setAcceleratedCompositingRootLayer, based on omitted frames?..
> But trying to guess execution flow based on missing frames is a long shot.
> Can you say what key the Chrome thread is writing? Maybe that would help see
> who is observing it, and whether there is a refcounting bug.

The Chrome thread is writing the key "PreviousSessionInfoParams".

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