[Bug target/19620] exception not caught when passing through C code

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2005-01-31 10:54 -------
> I'll admit that I don't understand the problem, at least on
> Sparc.  There is an ABI which defines what the C stack looks
> like; the C++ stack is, in fact, identical.  Walking back the
> stack is trivial.  The only thing you need the tables for is for
> finding destructor or handler code.

This indeed may be true on SPARC.

> So you won't find them in the C code which doesn't have the tables; that's no
> problem, because I'm pretty sure that the C code doesn't have any
> destructors, nor any exception handlers.

Sure, but GCC nevertheless needs unwind info describing that there is no table
and how to further unwind.

> Is there something linked with portability which precludes this
> approach.  (I know that the stack walkback code is NOT portable.
> But I would have thought that this was true with or without the
> tables.)

The exception propagation mechanism is generic and doesn't special-case SPARC at
the moment.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebotcazou at gcc dot gnu dot
                   |                            |org
          Component|c++                         |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19620