home *** CD-ROM | disk | FTP | other *** search
- Path: EU.net!sun4nl!xs4all!usenet
- From: jtv@xs4all.nl (Jeroen T. Vermeulen)
- Newsgroups: comp.sys.amiga.misc,comp.sys.amiga.programmer
- Subject: Re: toy operating systems, like AmigaOS
- Date: Sun, 21 Apr 96 21:31:44
- Organization: Leiden University, Mathematics & Computer Science, The Netherlands
- Distribution: world
- Message-ID: <19960421.7AF7A10.1375A@asd08-15.dial.xs4all.nl>
- References: <skllsf.984983.4.5@groomlake.mil> <4kplgo$o9r@canyon.sr.hp.com> <4ksu6q$haa@nadine.teleport.com> <19960417.7BBC9E0.3B7F@asd01-01.dial.xs4all.nl> <3175CF42.DAB@mail.stud.ingok.hitos.no> <4l7bjj$p27@btmpjg.god.bel.alcatel.be>
- NNTP-Posting-Host: asd08-15.dial.xs4all.nl
- Mime-Version: 1.0
- Content-Type: text/plain; charset=iso-8859-1
- Content-Transfer-Encoding: 8bit
- X-NewsSoftware: GRn 2.1 Feb 19, 1994
-
- In article <4l7bjj$p27@btmpjg.god.bel.alcatel.be> barnhoorn@nlev00 () writes:
-
- > >Jeroen T. Vermeulen wrote:
- > >> It would be great IMO to have an add-on layer to the OS that
- > >> aggressively checks and reports everything, but there shouldn't be too
- > >> much reason for the user to run that.
- > >
- > >There are tools which does that. Enforcer and Mungwall come to mind. If
- > >programmers used these tools, there would be no use for memory protection.
- > >
- > Enforcer and Mungwall do not give enough protection -> no warning
- > is generated when you are writing in memory, allocated by some other
- > process :-(
-
- Jaco, there is some truth to what he's saying. There is a difference between
- "doing the same thing as" memory protection and "reducing the need for" memory
- protection. Enforcer doesn't protect you (from pretty much anything), but it
- helps tremendously in finding cases where software does this. The cases that
- "usually" don't cause trouble (trashing random memory) are the most nasty, and
- these are the ones that Enforcer catches.
-
- If you add GuardianAngelRemix and MungWall, you can catch a lot more of these
- illegal accesses. Test rigorously and you will end up with a "safe" product.
- Not 100% bug-free perhaps, but if you reduce the risks to rougly the same level
- as, say, hardware failures and harmful user errors, then it buys you the
- stability you want without memory protection.
-
-
- > ---------------------------------------------------------------------------
- > Jaco Barnhoorn barnie@xs4all.nl
- > Software Test Engineer barnhoorn%nlev00@btmv56.se.bel.alcatel.be
- > Alcatel Telecom Systems
- > Rijswijk, The Netherlands
- > ---------------------------------------------------------------------------
-
- --
- ============================================================================
- # Jeroen T. Vermeulen \"How are we doing kid?"/ Yes, we use Amigas. #
- #--- jtv@xs4all.nl ---\"Oh, same as always."/-- ... --#
- #jvermeul@wi.leidenuniv.nl \ "That bad, huh?" / Got a problem with that? #
- Disclaimer: My mom always said I had a screw loose.
-