[Webkit-unassigned] [Bug 126121] New: The JavaScriptCore API ignores dynamically created protocols

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=126121

           Summary: The JavaScriptCore API ignores dynamically created
                    protocols
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: markvjal at gmail.com


Created an attachment (id=219854)
 --> (https://bugs.webkit.org/attachment.cgi?id=219854&action=review)
Example of dynamically generated protocol ignored by JavaScriptCore

I would like to use a dynamically generated protocol as my JSExport sub-protocol for interacting with JavaScriptCore.

However JavaScriptCore ignores dynamically generated protocols. Attached is a snippet which shows the behaviour when the protocol is statically defined, and when it is dynamically defined.

The "hello" method is only called when the protocol is statically defined.

I have tracked down the issue to the private Objective-C runtime method  _protocol_getMethodTypeEncoding() which returns null if the protocol method has been dynamically defined.

Said method is extensively used in the ObjCCallbackFunction.mm file. A solution, if possible, would be to use the method_getTypeEncoding() method which correctly outputs the type encoding for both dynamically and statically generated protocol methods.

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