Date: Thu, 02 Aug 2007 22:02:11 -0700 From: Garrett Cooper <youshi10@u.washington.edu> To: Yuri Pankov <yuri@darklight.org.ru> Cc: freebsd-current@freebsd.org, Nick Frampton <njf@statseeker.com> Subject: Re: gcc 4.2 profiling breaks argv Message-ID: <46B2B6D3.3080509@u.washington.edu> In-Reply-To: <20070803045036.GA1809@darklight.org.ru> References: <46B2A6B0.1030609@statseeker.com> <20070803045036.GA1809@darklight.org.ru>
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Yuri Pankov wrote:
> 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).
>>
>> -Nick
>> **
>>
>
> FWIW, I can't reproduce it on amd64:
>
>
>> cc -c -o test.o -pg test.c && cc -o test -pg test.o
>> ./test
>>
> argv=0x7fffffffe8b0
>
>> cc -v
>>
> Using built-in specs.
> Target: amd64-undermydesk-freebsd
> Configured with: FreeBSD/amd64 system compiler
> Thread model: posix
> gcc version 4.2.0 20070514 [FreeBSD]
>
>
> Yuri
>
I've already posted 2 other threads, and I believe a bug report
about this.
-Garrett
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