trace_get_event_file
extern struct trace_event_file *trace_get_event_file(const char *instance,
gen_kprobe_test = trace_get_event_file(NULL, "kprobes",
gen_kretprobe_test = trace_get_event_file(NULL, "kprobes",
empty_synth_test = trace_get_event_file(NULL, "synthetic",
create_synth_test = trace_get_event_file(NULL, "synthetic",
gen_synth_test = trace_get_event_file(NULL, "synthetic",
EXPORT_SYMBOL_GPL(trace_get_event_file);