Display information about memory use of an application for the program data

I use this tool to optimize applications. Changing code a bit might mean one less page of data. It also helps to see whether data is moved from pure data segments to relro segments which are more secure. Example output:

$ nrpages ~/bin/nrpages 
   /home/drepper/bin/nrpages:    1 read-only,    2 writable,     2 COW,     1 relro