[SR-Users] Help on how to debug cfg_get variable having unexpected value?

[Daniel-Constantin Mierla]

Hello,


can you provide more details about what you think is going wrong?


The value of this variable is updated by each process when that process
does some particular operations (e.g., receiving a sip message), it is
not propagated automatically to every kamailio process when you do the
update via kamcmd.


Cheers,
Daniel

On 14.05.18 19:43, Malcolm O'Hare wrote:
> I'm trying to debug an issue I've encountered where a variable that
> I've set using kamcmd cfg.set has an unexpected value when used in
> kamailio.  The variable should be 0 or 1, but it looks like its
> getting set accidently somehow.
>
> 2018-05-11T22:02:58.344260+00:00 ip-172-31-129-45 kamailio[5253]:
> DEBUG: <core> [select.c:263]: resolve_select(): 'with_dynamodb_user_data'
>
> 2018-05-11T22:02:58.344264+00:00 ip-172-31-129-45 kamailio[5253]:
> DEBUG: <core> [cfg/cfg_select.c:174]: select_cfg_var(): DEBUG:
> select_cfg_var(): select fixup is postponed:
> features.with_dynamodb_user_data
>
> 2018-05-11T22:05:03.467110+00:00 ip-172-31-129-45 kamailio[5551]:
> INFO: <core> [cfg/cfg_ctx.c:608]: cfg_set_now(): INFO: cfg_set_now():
> features.with_dynamodb_user_data has been changed to 1
>
> 2018-05-11T22:15:51.695118+00:00 ip-172-31-129-45 kamailio[5574]:
> [2c03c333-1705-41b1-aa26-6f10492a5a6f] DEBUG: with_dynamodb_user_data
> is 1157627905
>
>
> I've tried to debug using gdb using breaks and set a watch on the
> memory address of the var, but it looks like it keeps using different
> memory locations.  The value in the address pointed at by group.handle
> seems to change for each invocation of set_cfg_now, so when I try and
> put a watch on the address of *group.handle + var.offset it never gets
> hit.
>
> (gdb) print *group
> $36 = {num = 25, mapping = 0x7f56ee4474f0, vars = 0x0, add_var = 0x0,
> size = 164, meta_offset = 968, var_offset = 984, handle =
> 0x7f56edf92fd0, orig_handle = 0x0,
>   dynamic = 1 '\001', next = 0x0, name_len = 8, name = "f"}
>
> (gdb) print *var
> $62 = {def = 0x7f56ee471668, name_len = 23, pos = 24, offset = 164,
> flag = 0}
>
> Any ideas?
>
> Malcolm
>
>
>
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-- 
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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