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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug win32/26935] [gdb/testsuite] Using gold in
 gdb.base/morestack.exp causes incorrect debug info
Date: Mon, 04 Jan 2021 14:01:45 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26935

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|mi                          |win32

--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #4)
> (In reply to Tom de Vries from comment #3)
> > (In reply to Tom de Vries from comment #2)
> > > But with ld, we have:
> > > ...
> > > linetable: ((struct linetable *) 0x2f18420):
> > > INDEX  LINE   ADDRESS            IS-STMT
> > > 0      END    0x56555004         Y
> > > 1      109    0x56555b8b         Y
> > > ...
> > > If we're dropping lines 636 and 637 because the addresses are out of =
range,
> > > I'd say it makes sense to drop the corresponding END as well.
> >=20
> > This seems to work:
> > ...
> > diff --git a/gdb/buildsym.c b/gdb/buildsym.c
> > index 9525962d966..f2560dd7fe7 100644
> > --- a/gdb/buildsym.c
> > +++ b/gdb/buildsym.c
> > @@ -714,6 +714,14 @@ buildsym_compunit::record_line (struct subfile
> > *subfile, int line
> > ,
> >             break;
> >           subfile->line_vector->nitems--;
> >         }
> > +
> > +      /* Ignore an end-of-sequence marker marking an empty sequence.  =
*/
> > +      struct linetable_entry *last
> > +       =3D (subfile->line_vector->nitems =3D=3D 0
> > +          ? nullptr
> > +          : &subfile->line_vector->item[subfile->line_vector->nitems -=
 1]);
> > +      if (last =3D=3D nullptr || last->line =3D=3D 0)
> > +       return;
> >      }
> >=20=20
> >    e =3D subfile->line_vector->item + subfile->line_vector->nitems++;
> > ...
>=20
> Patch survives testsuite run.

Submitted:
https://sourceware.org/pipermail/gdb-patches/2021-January/174668.html

--=20
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