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Date: | Fri, 17 May 2002 20:22:05 +0300 |
From: | "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> |
Sender: | halo1 AT zahav DOT net DOT il |
To: | djgpp-workers AT delorie DOT com |
Message-Id: | <3942-Fri17May2002202204+0300-eliz@is.elta.co.il> |
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In-reply-to: | <3CE517CD.AD3D0617@yahoo.com> (message from CBFalconer on Fri, 17 |
May 2002 10:46:37 -0400) | |
Subject: | Re: emacs under w2k and malloc effects |
References: | <Pine DOT SUN DOT 3 DOT 91 DOT 1020516075834 DOT 13145D-100000 AT is> <3CE3990C DOT 308C92EC AT yahoo DOT com> <1225-Thu16May2002182200+0300-eliz AT is DOT elta DOT co DOT il> <3CE3FF64 DOT E0F0D953 AT yahoo DOT com> <4331-Fri17May2002115908+0300-eliz AT is DOT elta DOT co DOT il> <3CE517CD DOT AD3D0617 AT yahoo DOT com> |
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> Date: Fri, 17 May 2002 10:46:37 -0400 > From: CBFalconer <cbfalconer AT yahoo DOT com> > > However if something else effectively calls sbrk with a negative > value, nmalloc may later think it has a new noncontiguous block, > and may then very well allocate the same space twice!. This would > NOT be good. I don't think this is a real issue: any program that calls sbrk behind malloc's back should know what it's doing. In general, such programs don't call malloc at all. A similar situation exists if a program calls both buffered stdio functions like fread, and printf and unbuffered functions like read and write. We don't bother to protect the FILE object against unbuffered atrocities. So I don't think you should worry about this.
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