[PATCH v3 3/8] malloc: Basic support for memory tagging in the malloc() family

[Florian Weimer]

* Richard Earnshaw via Libc-alpha:

> +/* Set the tags for a region of memory, which must have size and alignment
> +   that are multiples of __MTAG_GRANULE_SIZE.  Size cannot be zero.
> +   void *__libc_mtag_tag_region (const void *, size_t)  */
> +#define __libc_mtag_tag_region(p, s) (p)

I think we need a description of how the tagging operation is supposed
to work.  For example, it's surprising that the requested tag is not
specified in an argument.

Thanks,
Florian
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