[lttng-dev] Runtime issue with mismatched arg name in TRACEPOINT_EVENT_INSTANCE and TRACEPOINT_EVENT_CLASS

[Eugene Ivanov]

Hi,

Recently I've used different names for the argument in
TRACEPOINT_EVENT_INSTANCE and TRACEPOINT_EVENT_CLASS. Everything
compiles, the probe is registered, but can't be activated.
__tracepoint_provider___probe.state is always 0 despite whatever is
shown in 'lttng list session_name'. In this case I would expect
compilation failure.

Probes example, note some_id and MISMATCHED_id:

TRACEPOINT_EVENT_CLASS(hello, myclass,
         TP_ARGS(const unsigned long *, some_id),
         TP_FIELDS(ctf_array(unsigned long, some_identifier, some_id, 2)))

TRACEPOINT_EVENT_INSTANCE(hello, myclass, probe_name, TP_ARGS(const
unsigned long *, MISMATCHED_id))


--
Eugene Ivanov


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