Date: Fri, 4 Jul 2008 13:01:11 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: freebsd-hackers@FreeBSD.org Cc: oleg@rinet.ru Subject: profiling broken on RELENG_7/i386 Message-ID: <20080704121833.J35668@woozle.rinet.ru>
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Dear colleagues,
It seems we step on a bug in gcc in RELENG_7/i386
It is triggered at least by profiling program which uses getopt(3):
marck@ref7-i386:~/tmp/gprof> cat test.c
#include <unistd.h>
int
main(int argc, char *argv[])
{
int ch;
while ((ch = getopt(argc, argv, "")) != -1) {
}
return (0);
}
marck@ref7-i386:~/tmp/gprof> make
Warning: Object directory not changed from original
/dumpster/home/marck/tmp/gprof
cc -O2 -fno-strict-aliasing -pipe -march=prescott -g -pg -c test.c
cc -O2 -fno-strict-aliasing -pipe -march=prescott -g -pg -o test test.o
marck@ref7-i386:~/tmp/gprof> ./test
Segmentation fault (core dumped)
marck@ref7-i386:~/tmp/gprof> gdb test test.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Core was generated by `test'.
Program terminated with signal 11, Segmentation fault.
#0 0x080481e0 in main (argc=Cannot access memory at address 0x1b
) at test.c:6
6 {
(gdb) l
1
2 #include <unistd.h>
3
4 int
5 main(int argc, char *argv[])
6 {
7 int ch;
8
9 while ((ch = getopt(argc, argv, "")) != -1) {
10 }
(gdb) marck@ref7-i386:~/tmp/gprof> truss ./test
__sysctl(0xbf7feb0c,0x2,0x806bf70,0xbf7feb18,0x0,0x0) = 0 (0x0)
__sysctl(0xbf7fe64c,0x2,0x806d558,0xbf7fe654,0x0,0x0) = 0 (0x0)
__sysctl(0xbf7fe69c,0x2,0xbf7fe6a8,0xbf7fe6ac,0x0,0x0) = 0 (0x0)
readlink("/etc/malloc.conf","aj",1024) = 2 (0x2)
issetugid(0x8066d0d,0xbf7fe70b,0x400,0xbf7feb18,0x0,0x0) = 0 (0x0)
break(0x8100000) = 0 (0x0)
break(0x8200000) = 0 (0x0)
sysarch(0xa,0xbf7feba0,0xbf7febc8,0x8048555,0x8102040,0xc) = 0 (0x0)
break(0x8226004) = 0 (0x0)
profil(0x82075a8,0xf52e,0x8048148,0x8000,0x0,0x0) = 0 (0x0)
SIGNAL 11 (SIGSEGV)
other ref platforms seem to be ok.
Any hints?
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer: marck@FreeBSD.org ]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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