Re: gcc 4.2 profiling breaks argv

From: Kris Kennaway <kris_at_obsecurity.org>
Date: Fri, 3 Aug 2007 01:00:17 -0400
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_at_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
Received on Fri Aug 03 2007 - 03:00:18 UTC

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