RESOLVED FIXED151877
[iOS] Bail out if the page proxy is invalid when WebPageProxy::processWillBecome{Foreground, Suspended}() are called 
https://bugs.webkit.org/show_bug.cgi?id=151877
Summary [iOS] Bail out if the page proxy is invalid when WebPageProxy::processWillBec...
Daniel Bates
Reported 2015-12-04 11:23:52 PST
Assume you have a single web page p open in MobileSafari (or nothing open - about:blank is implicitly loaded, though the favorites screen is showing). Suppose the web page crashes. Then the WebPageProxy p' associated with p will be marked as invalid (WebPageProxy::m_isValid == false) and the ProcessThrottler of the WebProcessProxy associated with p will schedule a process suspension timer (since there are no foreground or background processes - the foreground web page crashed). Assuming the process suspension timer fires before the WebPageProxy object associated with the crashed web page reattaches to a new web process then WebPageProxy::processWillBecomeSuspended() will be called on p' and the assertion ASSERT(m_isValid) will fail.
Attachments
Patch (2.08 KB, patch)
2015-12-04 11:28 PST, Daniel Bates 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Daniel Bates
Comment 1 2015-12-04 11:28:33 PST
Created attachment 266645 [details] Patch
Daniel Bates
Comment 2 2015-12-09 18:50:50 PST
Comment on attachment 266645 [details] Patch Clearing flags on attachment: 266645 Committed r193883: <http://trac.webkit.org/changeset/193883>
Daniel Bates
Comment 3 2015-12-09 18:50:55 PST
All reviewed patches have been landed. Closing bug.
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