[Bug middle-end/46671] [4.6 Regression] ICE in default_no_named_section, at varasm .c:5994

["davek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46671

--- Comment #9 from Dave Korn <davek at gcc dot gnu.org> 2010-12-06 17:27:06 UTC ---
(In reply to comment #8)
> sdbout.c is broken then.

  Quite likely, but I don't understand what it thinks it's trying to do yet
well enough to be sure how.

>  If it doesn't care in which code section it emits the
> stuff, it should at least not switch_to_section (text_section) if
> in_section != NULL && (in_section->flags & SECTION_CODE) != 0.

  I'll take a look at that possibility, thanks.  I'm going to have to read up
on the coff debug spec to see what it says about the matter.

> And in any case, it should remember in_section from the beginning of the
> function into say saved_section automatic var and if it was non-NULL, do
> switch_to_section (saved_section) at the end of the function.

  In fact I don't think that would help, GAS does not accept switching section
in the middle of an open CFI directive block (though this is probably an
implementation limitation rather than a deliberate design choice; cfi is
tracked on a per-frag basis, switching to a new section and back leads to
starting a new frag which doesn't have any pointer to the previously-begun cfi
block.)