Re: next/step after main() function's return

[Michael Snyder <msnyder at vmware dot com>]

Joel Brobecker wrote:
> > I'm guessing this happens because libc_start_main is compiled with -g.
> > Otherwise, gdb would continue executing "in the woods" until exit.
>
> Actually, off-by-one error :-). __libc_start_main is not compiled with
> debugging info, but main is.  When you do a "next" in main, GDB takes
> the debugging info, and computes the address range that we need to
> step out of.  So, when main returns back to __libc_start_main, we're
> done, and tell the user where we are.  What you are describing, however,
> happens once we land inside __libc_start_main, since there is no line
> info to help us compute the next/step range.

Hmm, yes, and that's when I would expect us to keep stepping, looking
for a line range, until eventually we exit.