[Webkit-unassigned] [Bug 136051] New: Web Replay: EventSender dispatches should be deterministic and per-Document

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=136051

           Summary: Web Replay: EventSender dispatches should be
                    deterministic and per-Document
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Events
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: burg at cs.washington.edu
                CC: darin at apple.com, timothy at apple.com,
                    joepeck at webkit.org, dbates at webkit.org,
                    akling at apple.com


EventSender causes JS code to execute nondeterministically. It uses a Timer to asynchronously dispatch the same event to multiple elements of the same type on a future run loop. It also force-dispatches the event when the document closes.

Currently, each (event name, element) pair gets its own static EventSender. This is quite nondeterministic because unrelated pages (say, the Inspector or another tab) share the same static EventSenders and can force-dispatch each others' pending events on implicitClose.

I propose making EventSender instances per-Document. Then we can use ReplayableTimer to iron out the scheduling.

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