Hi all,
Is it feasible to have an officially supported way of determining if a
tracepoint is currently enabled?
In my code I would like to test if the tracepoint is enabled, and if it
isn't, avoid doing expensive setup work.
I've been doing the following:
if
(__builtin_expect(!!(__tracepoint_sample_component___message.state), 0)) {
/* setup work */
tracepoint(sample_component, message);
/* cleanup work */
}
But it's weak for two reasons:
* The 'state' attribute goes true when the tracepoint is enabled, but
stays true after the tracepoint is disabled. It only goes false when
the session is destroyed.
* It uses a private / unofficial API
What I'd like is an official API that correctly evaluates whether a
tracepoint is enabled or not?
Is this possible?
Thanks,
Dave
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