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Date: Fri, 4 Jan 2008 15:21:50 +0300
From: Andrey Chernov <ache@nagual.pp.ru>
To: Jason Evans <jasone@FreeBSD.ORG>
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Mail-Followup-To: Andrey Chernov <ache@nagual.pp.ru>,
	Jason Evans <jasone@FreeBSD.ORG>, freebsd-current@FreeBSD.ORG,
	Poul-Henning Kamp <phk@FreeBSD.ORG>
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Cc: freebsd-current@FreeBSD.ORG, Poul-Henning Kamp <phk@FreeBSD.ORG>
Subject: Re: sbrk(2) broken
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On Wed, Jan 02, 2008 at 10:38:40PM -0800, Jason Evans wrote:
> Poul-Henning noticed today that xchat fails to start if malloc uses sbrk 
> internally.  

Malloc() itself knows about memory amount _really_ in use by a program and 
could check it don't go beyond the limits, but for this it needs run-time 
check via getrlimit() call for each malloc() call (a program can use 
setrlimit() by itself). Traking direct mmap()s and sbrk()s outside of 
malloc() is also needed.

-- 
http://ache.pp.ru/