[Webkit-unassigned] [Bug 215460] New: [Cocoa] Avoid changing XPC target queue inside XPC event handler

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215460

            Bug ID: 215460
           Summary: [Cocoa] Avoid changing XPC target queue inside XPC
                    event handler
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pvollan at apple.com

In WebProcess::handleXPCEndpointMessages we currently change the XPC target queue for the XPC bootstrap connection while under the XPC event handler. This sometimes causes simulated crashes on iOS and should be avoided. According to the documentation in https://developer.apple.com/documentation/xpc/1448786-xpc_connection_set_target_queue?language=objc, there does not seem to be anything saying this is a programming error, but the simulated crash claims it is.

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