Mike Ash • 10/11/2019

objc_msgSend's New Prototype

This technical blog post analyzes the recent change in Apple's OSes where the prototype for the core Objective-C function objc_msgSend was changed to void/void. It delves into the function's assembly implementation, its role in dynamic method dispatch, and why its true prototype is inherently variable, matching the signature of the target method implementation.

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#assembly #Runtime #Objective C