[Bug sanitizer/65662] AddressSanitizer CHECK failed: ../../../../gcc/libsanitizer/sanitizer_common/sanitizer_allocator.h:835 "((res)) < ((kNumPossibleRegions))" (0x3ffb49, 0x80000)

["pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65662

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> There are dups for this already.
> The issue is that aarch64-linux has 3 very much different virtual address
> space sizes and stock libsanitizer supports only the smallest one.  I have a
> patch for supporting the middle-one, see e.g.
> http://pkgs.fedoraproject.org/cgit/gcc.git/tree/gcc5-libsanitize-aarch64-
> va42.patch
> but supporting all 3 virtual address space sizes requires more changes
> upstream, because the smallest virtual address space size is really too
> small for anything usable.

The largest one is required to be supported for Cavium's ThunderX in a dual
socket case.  Can we declare address santizer broken for GCC 5 for AARCH64 due
to this?

I think MIPS has a similar issue too when different page sizes are used but
nobody upstream has reported it yet.