[erlang-questions] Calling a function when a dbg call trace is hit?

[Roger Lipscombe]

On 15 May 2014 11:08, T Ty <tty.erlang@REDACTED> wrote:
> I'm trying to understand what you mean by "It appears that all traces apply
> to all processes included in the session?"

Let me clarify:

If I set up a trace for a particular function, for all processes:

dbg:tpl(foo, bar, '_', []).
dbg:p(all, c).

...there doesn't seem to be a way to concurrently trace _more_
functions but only for a particular process:

dbg:tpl(quux, '_', []).
dbg:p(pid(0,321,0), c).

...at the same time. In other words, having two dbg "sessions" active at once.