Date: Sat, 30 Jun 2001 16:41:30 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: djgpp AT delorie DOT com
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Subject: Re: CWSDPMI/DJGPP integration [was Re: Peculiar behavior of program.]
References: <3b3bcc05 DOT sandmann AT clio DOT rice DOT edu> <3b3c14b3 DOT 264226436 AT news DOT primus DOT ca> <3b3bd249 DOT sandmann AT clio DOT rice DOT edu> <3b3d9a68 DOT 364006408 AT news DOT primus DOT ca>
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> From: invalid AT erehwon DOT invalid (Graaagh the Mighty)
> Newsgroups: comp.os.msdos.djgpp
> Date: Sat, 30 Jun 2001 09:24:56 GMT
> 
> On Fri, 29 Jun 2001  0:56:41, "Charles Sandmann"
> <sandmann AT clio DOT rice DOT edu> sat on a tribble, which squeaked:
> 
> >This won't catch huge overruns, but if you write-protect the entire text
> >section you will at least prevent overwrite of executable code and catch
> >errors sooner with correct error messages.
> 
> For non-self-modifying-code (and self-modifying is rare these days --
> self-modifying algorithms work best by using function pointers or ints
> and switch statements) this should work.

The limitation Charles mentioned has nothing to do with self-modifying
code.  What Charles told you is that if you have a very large
off-stack allocation, like if you have a large automatic array or
structure, or even a simple alloca(1000000), the separate stack
segment won't detect it.