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Date: Wed, 24 Nov 2004 09:31:39 -0800
From: Richard Henderson <rth AT redhat DOT com>
To: "Aaron W. LaFramboise" <aaronavay62 AT aaronwl DOT com>
Cc: Danny Smith <dannysmith AT users DOT sourceforge DOT net>, gcc AT gcc DOT gnu DOT org,
   Cygwin <cygwin AT cygwin DOT com>, mingw-dvlpr <mingw-dvlpr AT lists DOT sourceforge DOT net>
Subject: Re: stdcall lib functions with exception throwing callbacks vs Dwarf2 EH
Message-ID: <20041124173139.GA5380@redhat.com>
Mail-Followup-To: Richard Henderson <rth AT redhat DOT com>, "Aaron W. LaFramboise" <aaronavay62 AT aaronwl DOT com>, Danny Smith <dannysmith AT users DOT sourceforge DOT net>, gcc AT gcc DOT gnu DOT org, Cygwin <cygwin AT cygwin DOT com>, mingw-dvlpr <mingw-dvlpr AT lists DOT sourceforge DOT net>
References: <001701c4d1ab$949322e0$0a6d65da AT DANNY> <20041124003240 DOT GA6028 AT redhat DOT com> <000c01c4d1fa$3f297fd0$e56d65da AT DANNY> <20041124080708 DOT GA3578 AT redhat DOT com> <41A44B97 DOT 1060007 AT aaronwl DOT com>
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On Wed, Nov 24, 2004 at 02:51:35AM -0600, Aaron W. LaFramboise wrote:
> Is there a way to have the DW2 unwinder call some particular function,
> for eg, if the previous frame was not compiled with -fexceptions, rather
> than just crashing?  Is this what MD_FALLBACK_FRAME_STATE_FOR is for?

Yes, sortof.  I don't know if you can make it do what you want, exactly.

> Other Windows compilers are able to handle this condition.

If you want to be able to handle this, I recommend that you NOT use dwarf2.
Handling this condition is not in the dwarf2 design requirements.


r~

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