profiling broken on RELENG_7/i386

[Dmitry Morozovsky]

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 at 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 at 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 at ref7-i386:~/tmp/gprof> ./test 
Segmentation fault (core dumped)
marck at 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 at 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 at FreeBSD.org ]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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