[PATCH] [compiler-rt] Fix the prototype of ioctl interceptor

[Evgeniy Stepanov]

In http://reviews.llvm.org/D7038#112364, @kubabrecka wrote:

> Are you suggesting not to use the variadic prototype of the function, i.e.
>
>   int ioctl(int fildes, unsigned long request, void *arg);
>   
>
> ? Because that's exactly what I think is the cause of the memory corruptions that I saw.  Even when we *know* there's exactly one var-argument every time, the following function headers are not equal on all platforms:
>
>   int ioctl(int fildes, unsigned long request, void *arg);
>   int ioctl(int fildes, unsigned long request, ...);


Ok, I guess.
Btw, what platforms do you have in mind where the old code (w/o va_arg, but with "unsigned long request") would not work correctly?


http://reviews.llvm.org/D7038

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