[jira] [Created] (CB-6150) objc_msgSend causes EXC_BAD_ACCESS with plugins on arm64

["Joris Verbogt (JIRA)" <ji...@apache.org>]

Joris Verbogt created CB-6150:
---------------------------------

             Summary: objc_msgSend causes EXC_BAD_ACCESS with plugins on arm64
                 Key: CB-6150
                 URL: https://issues.apache.org/jira/browse/CB-6150
             Project: Apache Cordova
          Issue Type: Bug
          Components: iOS
    Affects Versions: 3.4.0
         Environment: iOS 7.0.6 arm64
            Reporter: Joris Verbogt


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);





--
This message was sent by Atlassian JIRA
(v6.2#6252)