One theme I have been noticing in the libsanitizer code is that it has
all of the knowledge of glibc when it comes to syscalls but makes some
bad assumptions dealing with some structures. For an example on MIPS
n64: stat and stat64 are different layout between user and kernel.
Don't ask, it is a historical mistake.
Also it really forces target maintainers to maintain both glibc and
libsanitizer code. ILP32 on aarch64 has some similar issues as x32
and MIPS n32.
Even Linus is pushing new 32bit targets to go the route of 64bit time
which is means libsanitizer code becomes even more complex.
This is indeed a PITA.
It is caused by our need to avoid even greater PITA of including
system headers into the sanitizer files
(we allow system #includes only in a handful of files).