[collectd] Collectd on freebsd 7x (specificially 7.2)

[Brett Hawn]

Florian Forster wrote:
> thanks for debugging this problem that far :) 262145 in hex is 0x40001,
> which isn't really related to 6 in any obvious way. The code was
> originally written for Mac OS X, so it's well possible that FreeBSD
> somehow treats the `socket protocol' differently from Mac OS X..
>
> There is another field burried deep within that structure,
>   (struct xsocket *)->xso_so->so_proto->pr_protocol
> in our case that's:
>   so->xso_so->so_proto->pr_protocol
>
> Could you maybe check the value of that member? From what I see it
> *should* be identical to (struct xsocket *)->xso_protocol, but you never
> know..
>
> Regards,
> -octo
>   
Unfortunately it appears to be blowing up nicely

I included <sys/protosw.h>

and then

    if (so->xso_protocol != 262145)
      continue;

     printf("Value of so->xso_so->so_proto->pr_protocol is %u", 
so->xso_so->so_proto->pr_protocol);

    /* Ignore PCBs which were freed during copyout. */
    if (inp->inp_gencnt > in_orig->xig_gen)
      continue;


cds794# gdb collectd
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
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Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...
(gdb) run -f
Starting program: /usr/local/collectd/sbin/collectd -f
[New LWP 100199]
[New Thread 0x800d020b0 (LWP 100199)]
[New Thread 0x800d023d0 (LWP 100049)]
[New Thread 0x800d02560 (LWP 100215)]
[New Thread 0x800d026f0 (LWP 100293)]
[New Thread 0x800d02880 (LWP 100294)]
[New Thread 0x800d02a10 (LWP 100295)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x800d02560 (LWP 100215)]
0x0000000800f0318b in conn_read () at tcpconns.c:608
608          printf("Value of so->xso_so->so_proto->pr_protocol is %u", 
so->xso_so->so_proto->pr_protocol);
(gdb) backtrace
#0  0x0000000800f0318b in conn_read () at tcpconns.c:608
#1  0x000000000040b032 in plugin_read_thread (args=Variable "args" is 
not available.
) at plugin.c:365
#2  0x00000008006584d1 in pthread_getprio () from /lib/libthr.so.3
#3  0x0000000000000000 in ?? ()
Error accessing memory address 0x7fffff9fe000: Bad address.

*boom*