Obtain message content of Erlang messages in dtrace

[Duncan Paul Attard]

Hello,

Just wanted to check on this.


> On 16 Dec 2019, at 13:16, Duncan Paul Attard <duncan.attard.01@REDACTED> wrote:
> 
> Thanks a lot!
> 
> Yes, currently I’m using erlang:trace/3, but was curious whether the same thing can be achieved `externally` via dtrace (or even LTTng).
> 
> Does `Dtrace is meant more to observe VM itself, not to trace you application.` mean that the message content cannot be retrieved though?
> 
> Duncan
> 
> 
>> On 16 Dec 2019, at 13:10, Łukasz Niemier <lukasz@REDACTED> wrote:
>> 
>>> I was experimenting with Erlang and dtrace, and am interested to know whether the message content exchanged between two Erlang processes can be obtained. In particular, I am interested in the `message-send` and `message-receive` probes.
>> 
>> Dtrace is meant more to observe VM itself, not to trace you application.
>> 
>>> Is there a way in which this can be achieved. And if not, are there any alternatives?
>> 
>> For tracing your own application you have erlang:trace/3, seq_trace, dbg, dyntrace, etc. If you are more interested in tracing and debugging applications in Erlang then you should check https://www.erlang-in-anger.com
>> 
>> --
>> 
>> Łukasz Niemier
>> lukasz@REDACTED
>> 
>> 
>> 
>> 
>> 
>