GDB doesn't show object's members

Question

I've a class Impl which inherites from Base.

A simple code snippet I'm trying to debug:

{
    Base* base = getObject();     // getObject() returns instance of Impl
    base->something();
}

When I want to inspect base I get:

p base
$1 = (Base *) 0x7fffc408edf0

p *base
$2 = {_vptr.Base = 0x7ffff74be100 <vtable for Impl+16>}

I'm compiling my program with gcc and I use -O0 -g. I've also tried -ggdb3 instead of -g with no use.

What may be important here: my project is divided into 3 modules: executable and two static libraries. Code I'm debugging lies in one of those static libraries, and definitions of Impl and Base are in second one.

Answer 1

You want (gdb) set print object on.

Documentation:

set print object on
  When displaying a pointer to an object, identify the actual (derived) type
  of the object rather than the declared type, using the virtual function table.