From: Dan Kegel <dank@alumni.caltech.edu>
To: atmproj@yahoo.com, linux-kernel@vger.kernel.org
Subject: Re: malloc(1/0) ??
Date: Mon, 06 Nov 2000 22:45:54 -0800 [thread overview]
Message-ID: <3A07A522.3D1914D2@alumni.caltech.edu> (raw)
atmproj@yahoo.com asked:
> [Why does this program not crash?]
>
> main()
> {
> char *s;
> s = (char*)malloc(0);
> strcpy(s,"fffff");
> printf("%s\n",s);
> }
It doesn't crash because the standard malloc is
optimized for speed, not for finding bugs.
Try linking it with a debugging malloc, e.g.
cc bug.c -lefence
and watch it dump core.
- Dan
-
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next reply other threads:[~2000-11-07 6:40 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-07 6:45 Dan Kegel [this message]
2000-11-07 7:13 ` malloc(1/0) ?? J. Dow
2000-11-07 7:52 ` David Schwartz
2000-11-08 0:47 ` Igmar Palsenberg
-- strict thread matches above, loose matches on Subject: below --
2000-11-07 16:12 Jesse Pollard
2000-11-07 16:38 ` lost
2000-11-07 9:26 malloc (1/0) ?? David Feuer
2000-11-07 3:59 malloc(1/0) ?? RAJESH BALAN
2000-11-07 7:54 ` David Schwartz
2000-11-07 7:59 ` Andrej Hosna
2000-11-07 8:50 ` David Schwartz
2000-11-07 8:09 ` Lyle Coder
2000-11-07 8:46 ` Matti Aarnio
2000-11-08 0:29 ` Rogier Wolff
2000-11-08 0:36 ` David Schwartz
2000-11-08 0:54 ` Igmar Palsenberg
2000-11-08 0:50 ` Igmar Palsenberg
2000-11-08 22:11 ` H. Peter Anvin
2000-11-08 22:11 ` Rasmus Andersen
2000-11-09 16:03 ` Igmar Palsenberg
2000-11-08 0:41 ` Igmar Palsenberg
2000-11-07 23:58 ` Tim Waugh
2000-11-08 12:38 ` Igmar Palsenberg
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