Re: Are mixed debug formats in one exe supported?

[Daniel Jacobowitz <drow at false dot org>]

On Tue, Mar 23, 2004 at 02:41:01PM -0600, Brian Ford wrote:
> I am trying to add DWARF2 support to PE/COFF for Cygwin/Mingw.  They
> currently use stabs.
> 
> While testing, executables end up having mixed stabs/DWARF2 debugging
> info if any system/gcc/previously compiled static libs are linked in.
> The result causes gdb to SEGV while traversing the partial symbol tables
> looking for symbol main.
> 
> The problem is that init_psymbol_list is called for the executable twice
> due to mainline being set at dbxread.c:562, and again at
> dwarf2read.c:1076.
> 
> So, the question.  Is this meant to work?  I assume the reason mainline is
> used here is:
> 
> /* If we are reinitializing, or if we have never loaded syms yet, init */
> 
> Why does reinitializing not clean up after itself (ie. reset the
> [global|static]_psymbols.size to 0)?  Is that a leak?
> 
> I'm going to keep digging, but since I have zero knowledge of gdb
> internals, I thought I'd ask and save some time.  Thanks.

I can't answer any of the more detailed questions, but yes, this is
supposed to work.  It's easy to produce binaries with both stabs and
DWARF-2 on GNU/Linux, and it generally works OK.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer