http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53754
Cary Coutant <ccoutant at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |ccoutant at gcc dot gnu.org
|gnu.org |
--- Comment #4 from Cary Coutant <ccoutant at gcc dot gnu.org> 2012-06-25
21:19:17 UTC ---
Created attachment 27705
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27705
Patch to fix ICE with -g -flto and anonymous namespace
> You can't delay producing pubnames this way with LTO. Please fix.
The obvious problem is that we're calling langhooks.dwarf_name (in
gen_namespace_die) for an anonymous namespace, even with the default
-gno-pubnames. I can fix that by adding a check for want_pubnames just before
the call to add_pubname_string, as in the patch below. But this is still going
to ICE if you turn on -gpubnames with -lto. The only way I can think of to fix
that is relax the assert in lhd_decl_printable_name, and just have it return an
empty string in the DECL_NAMELESS case. That will not produce the right results
for an anonmyous namespace, but without front-end langhooks available to us
(and until we implement the lazy debug plan), how can we do better?
How much is expected to work today with LTO and -g? Aren't we still stuck with
calling langhooks from dwarf2out.c back-end routines? I can understand that we
don't want to ICE, but what guarantees do we make about debug info?
-cary
