[erlang-questions] process trace triggered by sequential trace token

Kaiduan Xie <>
Wed Feb 2 18:38:06 CET 2011


Dmitriy,

Please correct me if my understanding is wrong.

You would like to trace a particular function of a particular
gen_server without changing the code. Do you know the pid of the
gen_server? How you know the pid of the interested gen_server?

Best regards,

/Kaiduan

On Wed, Feb 2, 2011 at 11:40 AM, Dmitriy Kargapolov
<> wrote:
> Kaiduan,
> I'd like to trace function calls (per match specs) in the body (callback) of
> gen_server for particular call to this gen_server. I'd like to do this on
> existing code, meaning no code alteration should be done to this gen_server
> process. If this is what you were able to do, would you please share your
> experience?
> Thank you.
>
> On Wed, Feb 2, 2011 at 11:07 AM, Kaiduan Xie <> wrote:
>>
>> Sorry for hitting wrong key.
>>
>> I have successfully traced a particular call from user A to user B
>> based on the headers in SIP message in a system that has many
>> concurrent calls using sequential trace. I do not know if this is what
>> you want.
>>
>> Best regards,
>>
>> /Kaiduan
>>
>> On Wed, Feb 2, 2011 at 11:04 AM, Kaiduan Xie <> wrote:
>> > Dimitriy,
>> >
>> > I
>> >
>> > On Wed, Feb 2, 2011 at 10:04 AM, Dmitriy Kargapolov
>> > <> wrote:
>> >> Hi All,
>> >> I'd like to trace gen_server body execution, not for all calls, but for
>> >> particular one.
>> >> Is there a way to enable trace for the process by received (and
>> >> matched)
>> >> message "contaminated" by trace token? (And disable it at the end of
>> >> message
>> >> processing). I know there is a way to turn sequential trace by matching
>> >> regular function call, but I need things to go in reverse order...
>> >> Thanks.
>> >>
>> >
>
>


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