[lttng-dev] Check if userland tracing enabled

[lttng-dev] Check if userland tracing enabled

[Simon Crowe]

All,

I am looking a userland C program, but i want the application to do a
little extra work when there is a tracing session active, is there fast
call I could use which would tell me if a tracing session is in progress on
my app or particular trace name

Regards

Si
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[lttng-dev] Check if userland tracing enabled

[Philippe Proulx]

On Fri, Sep 22, 2017 at 10:06 AM, Simon Crowe <smncrowe at gmail.com> wrote:
> All,
>
> I am looking a userland C program, but i want the application to do a little
> extra work when there is a tracing session active, is there fast call I
> could use which would tell me if a tracing session is in progress on my app
> or particular trace name

You can use tracepoint_enabled() and do_tracepoint() at least, which
is somewhat equivalent.

See <http://lttng.org/man/3/lttng-ust/v2.10/#doc-tracepoint>.

Phil
>
> Regards
>
> Si
>
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