[Clang] Disable use of the counted_by attribute for whole struct pointers (#112636)

The whole struct is specificed in the __bdos. The calculation of the
whole size of the structure can be done in two ways:

    1) sizeof(struct S) + count * sizeof(typeof(fam))
    2) offsetof(struct S, fam) + count * sizeof(typeof(fam))

The first will add any remaining whitespace that might exist after
allocation while the second method is more precise, but not quite
expected from programmers. See [1] for a discussion of the topic.

GCC isn't (currently) able to calculate __bdos on a pointer to the whole
structure. Therefore, because of the above issue, we'll choose to match
what GCC does for consistency's sake.

[1] https://lore.kernel.org/lkml/ZvV6X5FPBBW7CO1f@archlinux/

Co-authored-by: Eli Friedman <efriedma@quicinc.com>

0 files changed, 0 insertions, 0 deletions