3  * trace helpers.
16 #include <trace.h>
20  * create_instance - create a trace instance with *instance_name
28  * destroy_instance - remove a trace instance and free the data
42  * Returns 0 if the event was collected, 1 if the tool should stop collecting trace.
48 	struct trace_instance *trace = context;  in collect_registered_events()  local
49 	struct trace_seq *s = trace->seq;  in collect_registered_events()
63  * trace_instance_destroy - destroy and free a rv trace instance
65 void trace_instance_destroy(struct trace_instance *trace)  in trace_instance_destroy()  argument
67 	if (trace->inst) {  in trace_instance_destroy()
68 		destroy_instance(trace->inst);  in trace_instance_destroy()
69 		trace->inst = NULL;  in trace_instance_destroy()
72 	if (trace->seq) {  in trace_instance_destroy()
73 		free(trace->seq);  in trace_instance_destroy()
74 		trace->seq = NULL;  in trace_instance_destroy()
77 	if (trace->tep) {  in trace_instance_destroy()
78 		tep_free(trace->tep);  in trace_instance_destroy()
79 		trace->tep = NULL;  in trace_instance_destroy()
84  * trace_instance_init - create an trace instance
90  * Note that the trace instance is returned disabled. This allows
92  * to the kernel threads, before starting generating trace entries.
96 int trace_instance_init(struct trace_instance *trace, char *name)  in trace_instance_init()  argument
98 	trace->seq = calloc(1, sizeof(*trace->seq));  in trace_instance_init()
99 	if (!trace->seq)  in trace_instance_init()
102 	trace_seq_init(trace->seq);  in trace_instance_init()
104 	trace->inst = create_instance(name);  in trace_instance_init()
105 	if (!trace->inst)  in trace_instance_init()
108 	trace->tep = tracefs_local_events(NULL);  in trace_instance_init()
109 	if (!trace->tep)  in trace_instance_init()
116 	tracefs_trace_off(trace->inst);  in trace_instance_init()
121 	trace_instance_destroy(trace);  in trace_instance_init()
130 int trace_instance_start(struct trace_instance *trace)  in trace_instance_start()  argument
132 	return tracefs_trace_on(trace->inst);  in trace_instance_start()