[RFC] Gdb line table implementation tweak

[Daniel Jacobowitz]

On Tue, Feb 12, 2002 at 05:28:55PM -0700, Fred Fish wrote:
> The implementation of gdb's line number table can cause gdb to give
> misleading results when some parts of a program are compiled with
> debugging enabled and other parts are not.  Here is an example:

I like this patch; I like it a lot.  It fixes a problem I've described
on the lists several times now involving libstdc++.  I'm not sure it
will fix all my problems, given that texthigh/textlow for the psymtabs
are still used in various places and will be incorrect; but it should
be purely an improvement.

This should fix the problem we were attempting to solve in:

2001-11-13  Jim Blandy  <jimb@redhat.com>

	...

        Patch from Peter Schauer:
        
        * symtab.c (find_pc_sect_line): If we can't find the function
        containing PC, we certainly won't have line number information for
        that location, so return zero immediately.

Which had to be reverted for breaking assembly language debugging.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer