__attribute__((cleanup(function)) versus try/finally

[Mike Stump]

On Thursday, May 8, 2003, at 01:46 PM, Richard Henderson wrote:
> On Thu, May 08, 2003 at 11:29:50AM -0700, Mike Stump wrote:
>> If table size is a big issue, we can have C default to sjlj EH (lower
>> cost in non-EH code), and integrate in handling for sjlj exceptions
>> into the dwarf EH system.
>
> Lets not, please.  This is much harder than you realize, and
> involves a siginificant performance impact to dwarf-only EH.

Ok.  I was imagining a scheme that elaborated a failure case (lookup 
the pc and not find any entries) and just checked the new sp value 
against sjlh_EH_stack->sp and did the sjlj stack processing if 
required.  Maybe there are other nits that complicate it.