Date: Wed, 16 Jan 2008 08:54:47 GMT From: Francis Dupont <Francis.Dupont@fdupont.fr> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/119709: cc -pg produced bad binaries on x86 in 7.0-RC1 Message-ID: <200801160854.m0G8slF8057087@www.freebsd.org> Resent-Message-ID: <200801160900.m0G900wk043436@freefall.freebsd.org>
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>Number: 119709
>Category: i386
>Synopsis: cc -pg produced bad binaries on x86 in 7.0-RC1
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jan 16 09:00:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Francis Dupont
>Release: 7.0-RC1
>Organization:
ISC Inc.
>Environment:
FreeBSD f70.fdupont.fr 7.0-RC1 FreeBSD 7.0-RC1 #0: Mon Dec 24 12:18:24 UTC 2007 root@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
All binaries produced by [g]cc -pg crash in main() because the argument array is not correctly copied on x86 (32 bits).
Note the bug (and its fix!) is already known for current.
>How-To-Repeat:
cat > x.c
#include <stdio.h>
int
main(int argc, char *argv[])
{
int i;
for (i = 0; i < argc; i++)
printf("argv[%d] = %s\n", i, argv[i]);
printf("...\n");
}
^D
cc -g -O -pg -o x x.c
./x
-> Segmentation fault
>Fix:
According to the current list "gprof's broken in 7-CURRENT" thread, gcc 4.2 uses the %ecx register so it must be saved...Gdb seems to agree and BTW it is very easy to check.
So please apply the proper patch before proposing the RC2!
>Release-Note:
>Audit-Trail:
>Unformatted:
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