[Bug sanitizer/58994] asan.exp regressions on x86_64 darwin at -m64 but not -m32 at r204372

[glider at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58994

--- Comment #6 from Alexander Potapenko <glider at google dot com> ---
The problem is caused by _NSGetEnviron() being called before libSystem is
initialized. This happens because some initialization code calls __cxa_atexit()
before libSystem_initialize(), and __cxa_atexit() calls __asan_init() and
_NSGetEnviron().

The fix is trivial (call the real __cxa_atexit() if asan_inited == 0 instead of
calling __asan_init()), but before landing it I'll check why the crash doesn't
happen on LLVM (I suspect different linkage order).