[CB-6150] objc_msgSend causes EXC_BAD_ACCESS with plugins on arm64

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

Environment

iOS 7.0.6 arm64

• Assignee: Shazron Abdullah
• Reporter: Joris Verbogt
• Created: 03/Mar/14 09:16
• Updated: 23/Aug/18 07:26
• Resolved: 03/Mar/14 23:19

Description

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);

Issue Links

• is related to: CB-5888 objc_msgSend causes EXC_BAD_ACCESS with plugins