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Mail Archives: cygwin-developers/2001/10/22/20:57:28

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Date: Mon, 22 Oct 2001 20:58:28 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin-developers AT cygwin DOT com
Subject: Re: 1.3.4 status?
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On Mon, Oct 22, 2001 at 08:52:36PM -0400, Jonathan Kamens wrote:
>>  Date: Mon, 22 Oct 2001 20:47:40 -0400
>>  From: Christopher Faylor <cgf AT redhat DOT com>
>>  
>>  It's not a malloc issue.  gcc's -O3 optimization is screwing up regparm
>>  parameter passing, specifically in fhandler_console::read which seems to
>>  need to call alloca for some reason, although I can't say exactly why.
>
>Now here's someone with slightly more knowledge of x86 assembler code
>than I have :-).
>
>Seriously, I assume this means that I should (a) stop trying to track
>down this bug since you've figured it out, and (b) stop trying to
>compile Cygwin with -O3.

I'd say tentatively yes to the former and definitely yes to the latter.
If you can figure out how to rearrange the code in fhandler_console::read
to avoid the problem, though, that would be useful.

cgf

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