This is the mail archive of the
gdb@sourceware.org
mailing list for the GDB project.
gdb output
- From: Oliver Block <lists at block-online dot eu>
- To: gdb at sourceware dot org
- Date: Sat, 11 Nov 2006 03:18:41 +0100 (MET)
- Subject: gdb output
Hello,
a program causes a segmentation fault and I'd like to know if I interpret the
following gdb output correctly (text continues after output):
************************************************************************************
#1 Â0x4012eb3f in gethostbyname () from /lib/tls/libc.so.6
No symbol table info available.
#2 Â0x08049312 in http_send_recv (hostname=0x804a340 "www.oliver-block.eu",
  request=0x804b030 "GET /checkip.php HTTP/1.0\r\nHost:
www.oliver-block.eu\r\n\r\n") at ddnscli.c:168
    hptr = (struct hostent *) 0x804b068
    sptr = (struct servent *) 0x804b028
    sin = {sin_family = 2, sin_port = 0, sin_addr = {s_addr = 0},
 sin_zero = "\000\000\000\000\000\000\000"}
    s = 134514323
    retval = 45
    n = 0
    buflen = 1024
#3 Â0x080498ee in get_ip (qry=0x804b008) at ddnscli.c:323
    tmp = 0x0
    r = 0x804b030 "GET /checkip.php HTTP/1.0\r\nHost:
www.oliver-block.eu\r\n\r\n"
#4 Â0x080499fa in main (argc=3, argv=0xbffff1a4) at ddnscli.c:398
    option = 8 '\b'
    q = (struct query *) 0x804b008
(gdb) p sizeof(struct servent)
$1 = 16
****************************************************************************
When I extract
from #2:
sptr = (struct servent *) 0x804b028
from #4:
r = 0x804b030 "GET /checkip.php HTTP/1.0\r\nHost: www.oliver-block.eu\r\n\r\n"
as servent has a size of 16 bytes
804b028 + 16 = 0x804b038
These two variables seem to overlap. Do you agree?
Regards,
Oliver
--
Leben ist mehr als ...
<http://www.nak-nrw.de/index.php?id=71>