[Webkit-unassigned] [Bug 189663] REGRESSION (PSON): White or Black flash occurs when process swapping on navigation on Mac

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Sep 19 07:17:11 PDT 2018


https://bugs.webkit.org/show_bug.cgi?id=189663

--- Comment #19 from Antti Koivisto <koivisto at iki.fi> ---
> The crashes are likely caused by not calling
> pageClient().didRelaunchProcess() anymore in case of process swap. The
> PageClient needs to be notified that the WebPageProxy's process has changed.
> Otherwise, it cannot do the necessary updates and things like
> SmartMagnificationController keep trying to receive IPC from the old process
> instead of the new one.

The reason turned out to be that earlier suspend message to web process caused problems on iOS when it tore down the drawing area.

Nevertheless I put processDidExit/didRelaunchProcess calls back using a separate PageClient::processWillSwap path that avoids clearing root layer on but is otherwise the same as processDidExit.

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