https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96503
--- Comment #8 from Siddhesh Poyarekar <siddhesh at gcc dot gnu.org> --- (In reply to Martin Uecker from comment #7) > For __builtin_with_access we probably only want to allow > reducing the object size, while the 'extend_size' workaround > used by systemd (cf comment #4) would need to extend it. > Maybe we need another flag? I've been thinking of a new __object_size__ attribute to annotate functions that behave like __builtin_object_size so that calls to it override (and not just reduce) sizes returned by allocations. I can then use it to annotate a supported malloc_usable_size replacement (say, malloc_size_estimate) that actually works like __builtin_object_size and can then be used by systemd.
