vtable in polymorphic class of C++ using gdb [duplicate]

Answer 1

Did you try set print object on ?

(gdb) help set print object
Set printing of object's derived type based on vtable info.

Answer 2

If you have a sufficiently new version of gdb, you may want to look at the "info vtbl" command (or perhaps it is called "info vtable"; my own version of gdb is not sufficiently new, and so I cannot test the feature out myself).

I only noticed the feature when googling for an answer to this question and I noticed posts to the gdb mailing list circa 2012, notably this one from March 2012:

http://permalink.gmane.org/gmane.comp.gdb.patches/73957