[LLVMdev] Q: clang, obj-c: Hashing selectors to SEL's.

[David Chisnall]

This is a question specific to Apple's Objective-C runtime and would be more appropriately addressed to Apple's Objective-C mailing list.

David

On 13 Apr 2013, at 21:10, Charlie Burns <crb at sonic.net> wrote:

> 
> I'm trying to understand the method dispatch in objc_MsgSend.
> 
> At some point during compilation, ascii selectors are hashed
> into integer SEL's. Is this hash somehow guaranteed to be unique?
> If so, how? If not, how are collisions handled? Is this hashing
> done during the link phase?
> 
> Any insights/pointers to the code/documentation related to this
> hashing would be greatly appreciated.
> 
> Thanks,
> 
> Charlie
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