Date: Fri, 3 Aug 2007 01:00:17 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Nick Frampton <njf@statseeker.com> Cc: freebsd-current@freebsd.org Subject: Re: gcc 4.2 profiling breaks argv Message-ID: <20070803050017.GA56653@rot26.obsecurity.org> In-Reply-To: <46B2A6B0.1030609@statseeker.com>
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On Fri, Aug 03, 2007 at 01:53:20PM +1000, Nick Frampton wrote:
> Hi all,
>
> Programs segfault when attempting to access argv from main when compiled
> under gcc 4.2.0 with the -pg profiling option. The following program
> illustrates this problem.
>
> $ cat test.c
> #include <stdio.h>
> int main (int argc, char **argv) {
> fprintf (stderr, "argv=%p\n", argv);
> return 0;
> }
> $ cc -c -o test.o -pg test.c && cc -o test -pg test.o
> $ ./test
> Segmentation fault (core dumped)
>
> $ cc -v
> Using built-in specs.
> Target: i386-undermydesk-freebsd
> Configured with: FreeBSD/i386 system compiler
> Thread model: posix
> gcc version 4.2.0 20070514 [FreeBSD]
>
> $ uname -a
> FreeBSD test03.statseeker.com 7.0-CURRENT FreeBSD 7.0-CURRENT #1: Fri
> Aug 3 11:07:03 EST 2007
> root@test03.statseeker.com:/usr/obj/usr/src/sys/GENERIC i386
>
> This issue was reported on this list on 5th July 2007 by Garrett Cooper
> but argv was not mentioned in that post. I have not seen this problem
> reported elsewhere (e.g. on the gcc mailing list).
So perhaps you should do so?
Or try checking with 4.2.1 in case it's fixed already.
Kris
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