See currently loaded Shared Objects in Linux

Question

I have two, related questions:

• How can I see if a shared library is currently loaded? (i.e. system-wide, process agnostic)
• How can I see all shared libraries loaded by a process?

Answer 1

You can do both with lsof. To see what processes have a library open or mapped do:

lsof /path/to/lib.so

and to see what files (including shared libraries) a process has open and/or mapped, do:

lsof -p <pid>

Answer 2

Another way to see what's loaded in a process is by looking at the /proc/PID/maps file. This shows everything mapped into your address space, including shared objects mapped in.