Gdb - shared library debugging trouble

Не могу отладить динамическую либу, загружаемую в один из процессов программы

gdb attach 22595

info shared
   Syms  Read  Shared Object Library
   No          mylib.so

Reading symbols from mylib.so...done.

Breakpoint 1 at 0x3254b: file myfile.c, line 621.

Continuing.
Warning:
Cannot insert breakpoint 1.
Error accessing memory address 0x3254b: Input/output error.

Function «myfunction» not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 2 (myfunction) pending.

Continuing.
[Inferior 1 (process 23347) exited normally]

Никак не могу подцепиться к либе.