[lttng-dev] Enable UST probes only in specific process

[Dmitri Shubin]

Hi!

Is it possible to enable user-space tracepoint in specific process (of
given PID)?

AFAIU
lttng enable-event -u prov:probe --filter '$ctx.vpid==12345'
enables probe for all processes and then drops unmatched.

In my case I'm doing rather heavyweight thing in probe (getting stack
trace) and want to do that only in the process of interest.

Is it possible?

The only way I can do it now is playing with LTTNG_HOME variable setting it
to different paths for each process.

Thanks!
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