Jeremy C. Reed <reed@reedmedia.net> typed:
:On Fri, 19 Jan 2001, Simon Burge wrote:
:> When debugging with gdb it's useful to build debugging versions of
:> the programs.  On my main development machine, I have in /etc/mk.conf:
:> 	COPTS+=         -g
:> 	LDFLAGS+=       -g
:> so all programs and libraries get built with debugging information.
:Okay. I did this.
:telnet says:
:#0  0x482032a6 in strcpy ()
:#1  0x805a6a0 in _hostname ()
:#2  0x804da2c in main (argc=2, argv=0xbfbe556c) at main.c:356
:#3  0x804a2e5 in ___start ()
:But how can I easily find line "356" with all the #ifdef's and macros?
:(Is there some tool for that?)
:After testing further, it appears that the bad strcpy is really line 2434
:in commands.c. I wonder why the backtrace says the other one.

Line 356 is absolute.  Either use an editor or go "up" the stack and
list it.  tn() is a valid function.  Looks like the stack is being
hosed.  And, yes, at commands.c:2434

(gdb) up
#1  0x805a720 in _hostname ()
(gdb) up
#2  0x804da8c in main (argc=2, argv=0xbfbe514c) at main.c:356
356                     if (tn(argp - args, args) == 1)
(gdb) l
351                             *argp++ = argv[1];      /* port */
352                     *argp = 0;
353     
354                     if (setjmp(toplevel) != 0)
355                             Exit(0);
356                     if (tn(argp - args, args) == 1)
357                             return (0);
358                     else
359                             return (1);
360             }
(gdb) l tn
2367    
2368        int
2369    tn(argc, argv)
2370        int argc;
2371        char *argv[];
2372    {
2373        struct addrinfo hints, *res, *res0;
2374        char *cause = "telnet: unknown";
2375        int error;
2376    #if     defined(IP_OPTIONS) && defined(IPPROTO_IP)
(gdb) 

Regards,
-- 
Geoff Wing : <gcw@pobox.com>
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