-fexceptions? -fasync-unwind-tables?

[Ulrich Weigand]

Gregory Turner wrote:

> Possible goals are:
> 
>   achieve real "SEH"-style syntax, that is, no bloody __ENDTRY macro.
>   
>   fix "break"
> 
>   fix "return" from try/finally blocks.

These are certainly interesting goals, but they appear to be hard
to achieve without compiler support ...

> Anyhow, I'll take a look at the dwarf2 goodies, maybe I'll decide that it's 
> do-able, but more trouble than its worth... either way, I intend to make some 
> kind of patch out of this whole investigation, as I am pretty darn sure I can 
> at least fix one of the forementioned deficiencies, maybe even two, without 
> making any major sacrifices.

I don't quite see how dwarf2 unwinding fits into this.  Is this just to be
able to avoid the setjmp?

Note that g++ exception handling with dwarf2 works quite different from
MSVC exception handling -- the former hooks exception processing into
the dwarf2 frame 'personality' routines, while the latter uses the
exception frame chain anchored in the TEB ...

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  weigand at informatik.uni-erlangen.de