http://www.andythemoron.com/blog/2017-04-27/Proc-Filesystem
https://fredrb.github.io/2016/10/01/Understanding-proc/
https://news.ycombinator.com/item?id=12641155
http://codeyarns.com/2015/04/27/memory-layout-of-a-process-in-linux/
https://landley.net/writing/memory-faq.txt
/proc
http://habrahabr.ru/post/209446/
http://linux.die.net/man/5/proc
https://blogs.oracle.com/ksplice/entry/solving_problems_with_proc