10 #include "trace.h"
51  * create_instance - create a trace instance with *instance_name
59  * destroy_instance - remove a trace instance and free the data
68  * save_trace_to_file - save the trace output of the instance to the file
72 	const char *file = "trace";  in save_trace_to_file()
80 		err_msg("Failed to open trace file\n");  in save_trace_to_file()
118 	struct trace_instance *trace = context;  in collect_registered_events()  local
119 	struct trace_seq *s = trace->seq;  in collect_registered_events()
130  * trace_instance_destroy - destroy and free a rtla trace instance
132 void trace_instance_destroy(struct trace_instance *trace)  in trace_instance_destroy()  argument
134 	if (trace->inst) {  in trace_instance_destroy()
135 		disable_tracer(trace->inst);  in trace_instance_destroy()
136 		destroy_instance(trace->inst);  in trace_instance_destroy()
137 		trace->inst = NULL;  in trace_instance_destroy()
140 	if (trace->seq) {  in trace_instance_destroy()
141 		free(trace->seq);  in trace_instance_destroy()
142 		trace->seq = NULL;  in trace_instance_destroy()
145 	if (trace->tep) {  in trace_instance_destroy()
146 		tep_free(trace->tep);  in trace_instance_destroy()
147 		trace->tep = NULL;  in trace_instance_destroy()
152  * trace_instance_init - create an rtla trace instance
158  * Note that the trace instance is returned disabled. This allows
160  * to the kernel threads, before starting generating trace entries.
162 int trace_instance_init(struct trace_instance *trace, char *tool_name)  in trace_instance_init()  argument
164 	trace->seq = calloc(1, sizeof(*trace->seq));  in trace_instance_init()
165 	if (!trace->seq)  in trace_instance_init()
168 	trace_seq_init(trace->seq);  in trace_instance_init()
170 	trace->inst = create_instance(tool_name);  in trace_instance_init()
171 	if (!trace->inst)  in trace_instance_init()
174 	trace->tep = tracefs_local_events(NULL);  in trace_instance_init()
175 	if (!trace->tep)  in trace_instance_init()
182 	tracefs_trace_off(trace->inst);  in trace_instance_init()
187 	trace_instance_destroy(trace);  in trace_instance_init()
194 int trace_instance_start(struct trace_instance *trace)  in trace_instance_start()  argument
196 	return tracefs_trace_on(trace->inst);  in trace_instance_start()
202 int trace_instance_stop(struct trace_instance *trace)  in trace_instance_stop()  argument
204 	return tracefs_trace_off(trace->inst);  in trace_instance_stop()
208  * trace_events_free - free a list of trace events
230  * trace_event_alloc - alloc and parse a single trace event
393  * trace_events_disable - disable all trace events
521  * trace_events_destroy - disable and free all trace events
533 int trace_is_off(struct trace_instance *tool, struct trace_instance *trace)  in trace_is_off()  argument
543 	 * The trace instance is only enabled when -t is set. IOW, when the system  in trace_is_off()
546 	if (trace && !tracefs_trace_is_on(trace->inst))  in trace_is_off()