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  1. Apache Cordova
  2. CB-6150

objc_msgSend causes EXC_BAD_ACCESS with plugins on arm64


    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.4.0
    • Fix Version/s: 3.5.0
    • Component/s: cordova-ios
    • Labels:
    • Environment:

      iOS 7.0.6 arm64


      This bug was mentioned before in https://issues.apache.org/jira/browse/CB-5888

      The code in CDVCommandQueue line 197:
      objc_msgSend(obj, normalSelector, command);
      Causes a EXC_BAD_ACCESS on arm64.

      According to Apple's docs at https://developer.apple.com/library/ios/documentation/General/Conceptual/CocoaTouch64BitGuide/ConvertingYourAppto64-Bit/ConvertingYourAppto64-Bit.html :

      An exception to the casting rule described above is when you are calling the objc_msgSend function or any other similar functions in the Objective-C runtime that send messages. Although the prototype for the message functions has a variadic form, the method function that is called by the Objective-C runtime does not share the same prototype. The Objective-C runtime directly dispatches to the function that implements the method, so the calling conventions are mismatched, as described previously. Therefore you must cast the objc_msgSend function to a prototype that matches the method function being called.

      This bug can be solved by explicit casting, like so:

      ((void(*)(id, SEL, id))objc_msgSend)(obj, normalSelector, command);


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              • Assignee:
                shazron Shazron Abdullah
                silentjohnny Joris Verbogt
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