Lines Matching defs:trace
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;
49 struct trace_seq *s = trace->seq;
63 * trace_instance_destroy - destroy and free a rv trace instance
65 void trace_instance_destroy(struct trace_instance *trace)
67 if (trace->inst) {
68 destroy_instance(trace->inst);
69 trace->inst = NULL;
72 if (trace->seq) {
73 free(trace->seq);
74 trace->seq = NULL;
77 if (trace->tep) {
78 tep_free(trace->tep);
79 trace->tep = NULL;
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)
98 trace->seq = calloc(1, sizeof(*trace->seq));
99 if (!trace->seq)
102 trace_seq_init(trace->seq);
104 trace->inst = create_instance(name);
105 if (!trace->inst)
108 trace->tep = tracefs_local_events(NULL);
109 if (!trace->tep)
116 tracefs_trace_off(trace->inst);
121 trace_instance_destroy(trace);
130 int trace_instance_start(struct trace_instance *trace)
132 return tracefs_trace_on(trace->inst);