From: "David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>
To: "comp.lang.ada mail to news gateway" <comp.lang.ada@ada.eu.org>
Subject: Re: status of PL/I as a viable language
Date: Thu, 20 Feb 2003 17:00:48 -0600
Date: 2003-02-20T17:00:48-06:00 [thread overview]
Message-ID: <mailman.30.1045781951.9948.comp.lang.ada@ada.eu.org> (raw)
----- Original Message -----
From: "Peter Flass" <peter_flass@yahoo.com>
Newsgroups: comp.lang.pl1,comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: February 20, 2003 4:06 PM
Subject: Re: status of PL/I as a viable language
> "John R. Strohm" wrote:
> > The last bug I found and fixed at my last employer was a null pointer
> > access. That company has an internal coding policy that pointers will
> > ALWAYS be tested for null before being dereferenced.
>
> I would submit that this should be done by hardware, not software (i.e.
> location 0, assuming null is 0) should be fetch-protected from
> everywhere but a few O/S routines. Anything else is a colossal waste of
> computing resources.
Well, that's probably what happened in this case. This would cause a
segmentation fault, which would probably require more computing
resource to recover from, as it would to test the pointer for null and
take the appropriate action -- i.e., handling a signal costs more than
testing the value of a register for zero/non-zero.
> _______________________________________________
> comp.lang.ada mailing list
> comp.lang.ada@ada.eu.org
> http://ada.eu.org/mailman/listinfo/comp.lang.ada
>
>
next reply other threads:[~2003-02-20 23:00 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 23:00 David C. Hoos, Sr. [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-02-26 20:55 status of PL/I as a viable language David C. Hoos
2003-02-27 12:12 ` Preben Randhol
2003-02-22 13:26 David C. Hoos, Sr.
2003-02-21 18:17 Lionel.DRAGHI
2003-02-21 18:44 ` Hyman Rosen
[not found] <mHZ0a.42983$jM5.108891@newsfeeds.bigpond.com>
[not found] ` <nRg1a.190899$HG.32437469@news4.srv.hcvlny.cv.net>
[not found] ` <3E51908E.9CCA3412@adaworks.com>
[not found] ` <8Gh4a.7455$_c6.743959@newsread2.prod.itd.earthlink.net>
[not found] ` <3E51ABCE.5491B9A2@adaworks.com>
[not found] ` <b2spe6$p23$1@helle.btinternet.com>
[not found] ` <3E5273DE.2050206@cox.net>
[not found] ` <3E531E6F.BDFB2599@adaworks.com>
[not found] ` <3E546C45.4010406@cox.net>
2003-02-20 15:49 ` Richard Riehle
2003-02-20 16:26 ` Donald L. Dobbs
2003-02-20 17:15 ` Preben Randhol
2003-02-21 6:24 ` Anders Wirzenius
2003-02-21 18:44 ` John R. Strohm
2003-02-20 17:58 ` Hyman Rosen
2003-02-20 18:44 ` John R. Strohm
2003-02-20 19:09 ` Larry Kilgallen
2003-02-20 19:27 ` John R. Strohm
2003-02-20 19:48 ` Hyman Rosen
2003-02-20 21:12 ` John R. Strohm
2003-02-20 21:39 ` Bobby D. Bryant
2003-02-21 20:36 ` Randy Brukardt
2003-02-21 8:33 ` Jean-Pierre Rosen
2003-02-20 19:34 ` Hyman Rosen
2003-02-20 19:52 ` Vinzent Hoefler
2003-02-20 20:14 ` Hyman Rosen
2003-02-20 21:20 ` Vinzent Hoefler
2003-02-21 8:14 ` Ondřej Tučný
2003-02-21 14:54 ` Hyman Rosen
2003-02-21 15:05 ` Vinzent Hoefler
2003-02-21 15:55 ` Preben Randhol
2003-02-21 16:45 ` Hyman Rosen
2003-02-21 17:40 ` Preben Randhol
2003-02-21 17:44 ` Preben Randhol
2003-02-21 18:10 ` Hyman Rosen
2003-02-21 18:38 ` Preben Randhol
2003-02-21 18:40 ` Preben Randhol
2003-02-21 18:52 ` Hyman Rosen
2003-02-21 19:24 ` Vinzent Hoefler
2003-02-21 19:57 ` Hyman Rosen
2003-02-21 20:37 ` Vinzent Hoefler
2003-02-21 20:55 ` Randy Brukardt
2003-02-21 18:42 ` Vinzent Hoefler
2003-02-21 18:48 ` John R. Strohm
2003-02-21 20:22 ` Richard Riehle
2003-02-21 20:51 ` Randy Brukardt
2003-02-21 21:29 ` Hyman Rosen
2003-02-21 21:44 ` Vinzent Hoefler
2003-02-23 5:05 ` Hyman Rosen
2003-02-24 16:29 ` Vinzent Hoefler
2003-02-22 11:06 ` Preben Randhol
2003-02-23 22:04 ` tmoran
2003-02-24 9:32 ` Preben Randhol
2003-03-02 2:37 ` AG
2003-03-01 13:46 ` Preben Randhol
2003-03-03 0:57 ` AG
2003-03-02 12:40 ` Preben Randhol
2003-03-02 16:52 ` John R. Strohm
2003-03-03 0:19 ` Georg Bauhaus
2003-03-03 3:03 ` John R. Strohm
2003-03-04 12:11 ` Faust
2003-03-03 8:01 ` Preben Randhol
2003-02-24 20:15 ` Randy Brukardt
2003-02-25 10:00 ` Preben Randhol
2003-02-26 1:10 ` Randy Brukardt
2003-02-26 18:49 ` Stephen Leake
2003-02-27 12:09 ` Preben Randhol
2003-03-01 18:16 ` Richard Riehle
2003-03-02 1:56 ` AG
[not found] ` <iqeli-c2d.ln1@beastie.ix.netcom.com>
2003-02-23 5:13 ` Hyman Rosen
2003-02-28 10:32 ` Lutz Donnerhacke
2003-02-28 18:52 ` Vinzent Hoefler
2003-02-23 19:19 ` Berend de Boer
2003-02-24 6:19 ` Hyman Rosen
2003-02-20 22:10 ` Peter Flass
2003-02-20 22:26 ` Chad R. Meiners
2003-02-21 9:13 ` Dmitry A. Kazakov
2003-02-21 14:56 ` Hyman Rosen
2003-02-21 16:04 ` Preben Randhol
2003-02-21 19:41 ` Mike Silva
2003-02-21 20:41 ` Richard Riehle
2003-02-21 21:46 ` Donald L. Dobbs
2003-02-23 2:23 ` Shmuel (Seymour J.) Metz
2003-02-23 5:02 ` Hyman Rosen
2003-02-23 18:34 ` Donald L. Dobbs
2003-02-24 6:22 ` Hyman Rosen
2003-02-21 19:16 ` John R. Strohm
2003-02-21 19:49 ` Hyman Rosen
2003-02-21 20:32 ` Frank J. Lhota
2003-02-21 20:40 ` John R. Strohm
2003-02-21 20:35 ` John R. Strohm
2003-02-21 21:40 ` Hyman Rosen
2003-02-21 22:25 ` John R. Strohm
2003-02-22 10:56 ` Preben Randhol
2003-02-22 19:55 ` Everett M. Greene
2003-02-23 11:15 ` Preben Randhol
2003-02-22 19:55 ` Everett M. Greene
2003-02-22 20:03 ` John R. Strohm
2003-02-22 22:38 ` Larry Kilgallen
2003-02-21 21:44 ` Pointless Harlows
2003-02-22 4:51 ` John W. Kennedy
2003-02-23 0:13 ` James J. Weinkam
2003-02-23 2:28 ` John W. Kennedy
2003-02-20 21:45 ` Larry Kilgallen
2003-02-20 22:06 ` Peter Flass
2003-02-20 23:30 ` John R. Strohm
2003-02-21 13:46 ` Peter Flass
2003-02-21 20:33 ` Shmuel (Seymour J.) Metz
2003-02-21 20:26 ` Shmuel (Seymour J.) Metz
2003-02-20 22:34 ` Larry Kilgallen
[not found] ` <1lagi-b33.ln1@beastie.ix.netcom.com>
2003-02-21 16:09 ` Preben Randhol
2003-02-21 18:10 ` Larry Kilgallen
2003-02-24 12:00 ` Larry Kilgallen
2003-02-21 20:16 ` Shmuel (Seymour J.) Metz
2003-02-22 12:57 ` Peter Flass
2003-02-23 2:27 ` Shmuel (Seymour J.) Metz
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox