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Re: sjlj-exceptions ICE. simplified test case
- To: Geert Bosch <bosch at gnat dot com>
- Subject: Re: sjlj-exceptions ICE. simplified test case
- From: Richard Henderson <rth at cygnus dot com>
- Date: Wed, 26 Apr 2000 10:53:51 -0700
- Cc: Robert Lipe <robertl at sco dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- References: <20000426141306.5542534D81@nile.gnat.com>
On Wed, Apr 26, 2000 at 10:14:03AM -0400, Geert Bosch wrote:
> Especially in the context of embedded systems, the space overhead of unwind
> tables may not be acceptable,
Have you looked at the code generated by the sjlj exceptions recently?
It's huge. I think it'd be a stretch to claim sjlj is smaller.
> Another issue is that in some cases it might be necessary to have support
> for propagating exceptions through foreign code without any tables at all.
Yeah, I suppose.
> At least on SGI it used to be the case that during program initialization
> all addresses in unwind tables were patched up, which caused excessive
> startup delays because of swapping...
Not fixed, but fixable. I've made suggestions before when asked, but
no one's ever implemeneted it. Perhaps something to make sure to get
done before gcc3 and the c++ abi change...
r~