pmap in Linux

Hello,

I'd like to measure the amount of RAM required by a single process, but it
turned to be a non-trivial task because of demand paging, dynamic
libraries and fork() usage.

In Solaris it's pretty easy to get what I want using pmap. It shows
the whole application virtual memory and, amongst other things, the RSS
for each region/area.

Unfortunately, this feature has not been implemented in the Linux pmap
port as it just lists region attributes and size, probably because
the info I look for cannot be gathered directly from the /proc dir.

Any hint about this?

Thanks