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Mail Archives: cygwin-developers/2001/10/22/22:26:34

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Message-ID: <034501c15b6a$9a51fd10$0200a8c0@lifelesswks>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: <cygwin-developers AT cygwin DOT com>
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Subject: Re: 1.3.4 status?
Date: Tue, 23 Oct 2001 12:29:51 +1000
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----- Original Message -----
From: "Christopher Faylor" <cgf AT redhat DOT com>
To: <cygwin-developers AT cygwin DOT com>
Sent: Tuesday, October 23, 2001 12:23 PM
Subject: Re: 1.3.4 status?


> On Tue, Oct 23, 2001 at 12:18:05PM +1000, Robert Collins wrote:
> >on every call, it checks the stack depth. _everything_ allocated from
a
> >call point deeper in the stack is reclaimed, and freed (alloca only
uses
> >the stack to identify when to do stuff, not for storage).
>
> That's what libiberty's alloca does.  That is for systems for which a
> real alloca is difficult or impossible.  That isn't what the builtin
> alloca does.

*Blush*. I should have recalled builtin-alloca's existence.

> The alloca that cygwin uses is below.  This is from
> gcc/config/i386/cygwin.asm.
...
or in other words, allocate directly on the stack. Cool.

Rob

- Raw text -


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