Date: Fri, 03 Aug 2007 13:53:20 +1000 From: Nick Frampton <njf@statseeker.com> To: freebsd-current@freebsd.org Subject: gcc 4.2 profiling breaks argv Message-ID: <46B2A6B0.1030609@statseeker.com>
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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).
-Nick
**
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