Comment #7 on issue 278 by [email protected]: Do not sanitize kernel
area on 32-bit targets
http://code.google.com/p/address-sanitizer/issues/detail?id=278
We can try
1. checking /proc/PID/maps
2. mmapping several addresses in the upper 1Gb
3. checking where is the current stack pointer
None of that is exceptionally robust (although #3 should work on most
systems I've encountered).
Maybe also hide this feature under a flag?
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