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Re: [Xen-devel] [PATCH V2 3/6] [RFC] xen/common: Introduce _xrealloc function

On 07.08.2019 20:36, Oleksandr wrote:
There's one more thing for the re-alloc case though (besides
cosmetic aspects): The incoming pointer should also be verified
to be of correct type.

Jan, how this could be technically implemented, or are these any existing 
examples in Xen?

See x86's copy_to_guest_offset(), for example. To get the compiler
to emit a warning (at least), a (typically otherwise dead)
comparison of pointers is commonly used.


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