https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107963
--- Comment #3 from Fangrui Song <i at maskray dot me> ---
GCC doesn't implement -fsanitize=memory.
In the absence of it, __attribute__((disable_sanitizer_instrumentation)) is
like __attribute__((no_sanitize("all"))).
When -fsanitize=memory is implemented, the two attribute will be different.
