Cross-testing libsanitizer

[Yury Gribov]

>> Is this 8G of RAM? If yes - I'd be curious to know which part of
>> libsanitizer needs so much memory.
>
> Here is what I have in gcc.log:
> ==12356==ERROR: AddressSanitizer failed to allocate 0x200001000
> (8589938688) bytes at address ffffff000 (errno: 12)^M
> ==12356==ReserveShadowMemoryRange failed while trying to map
> 0x200001000 bytes. Perhaps you're using ulimit -v^M

Interesting. AFAIK Asan maps shadow memory with NORESERVE flag so it 
should not consume any RAM at all...

-Y