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SIGSEGV

P: n/a
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 *0x4012eb3f in gethostbyname () from /lib/tls/libc.so.6
No symbol table info available.
#2 *0x08049312 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 *0x080498ee 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 *0x080499fa 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 = 804b038

These two variables seem to overlap. Do you agree?

Regards,

Oliver
--
Leben ist mehr als ...
<http://www.nak-nrw.de/index.php?id=71>
Nov 11 '06 #1
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P: n/a
On Sat, 11 Nov 2006 02:37:23 +0100, Oliver Block
<ne********@block-online.euwrote in comp.lang.c:
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):
Sorry, we speak C here, not debuggers or other tools. Try a one of
the gnu.gcc.* groups, or perhaps one for your particular flavor of
*nix. This is not a language question.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://c-faq.com/
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~a...FAQ-acllc.html
Nov 11 '06 #2

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