Fix: check for event class/instance prototype mismatch
The TP_ARGS() for an event instance belonging to an event class
must have compatible types with the event class TP_ARGS().
Failure to follow this rule leads to a prototype mismatch between the
tracepoint call site and the probe function. A common effect perceived
is that events with prototype mismatch between call site and probe
function are never traced.
Fix this by enforcing a compile-time check of the event instance and
class prototypes, similarly to what is done in LTTng modules.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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