#include <errno.h>
#include <urcu/list.h>
+#include <string.h>
#include <lttng/lttng.h>
#include <lttng-sessiond-comm.h>
#include <lttngerr.h>
+#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
+#include <ust/lttng-ust-ctl.h>
+#else
+#include "lttng-ust-ctl.h"
+#endif
+
#include "channel.h"
#include "event.h"
#include "kernel-ctl.h"
end:
return ret;
}
+
+/*
+ * Enable UST tracepoint event for a channel from a UST session.
+ */
+int event_ust_enable_tracepoint(struct ltt_ust_session *ustsession,
+ struct ltt_ust_channel *ustchan, struct lttng_event *event)
+{
+ int ret;
+ struct ltt_ust_event *ustevent;
+ struct lttng_ust_event lttngustevent;
+ struct object_data *object_event;
+
+ ustevent = trace_ust_get_event_by_name(event->name, ustchan);
+ if (ustevent == NULL) {
+ ustevent = trace_ust_create_event(event);
+ if (ustevent == NULL) {
+ ret = -1;
+ goto end;
+ }
+ strncpy(lttngustevent.name, event->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ lttngustevent.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ /* TODO: adjust to other instrumentation types */
+ lttngustevent.instrumentation = LTTNG_UST_TRACEPOINT;
+ ret = ustctl_create_event(ustsession->sock, <tngustevent,
+ ustchan->obj, &object_event);
+ if (ret < 0) {
+ if (ret == -EEXIST) {
+ ret = LTTCOMM_KERN_EVENT_EXIST;
+ } else {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ }
+ goto end;
+ }
+ ustevent->obj = object_event;
+ ustevent->handle = object_event->handle;
+ ustevent->enabled = 1;
+ /* Add event to event list */
+ cds_list_add(&ustevent->list, &ustchan->events.head);
+ ustchan->events.count++;
+ } else if (ustevent->enabled == 0) {
+ ret = ustctl_enable(ustsession->sock, ustevent->obj);
+ if (ret < 0) {
+ ret = LTTCOMM_KERN_ENABLE_FAIL;
+ goto end;
+ }
+ ustevent->enabled = 1;
+ }
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}
+
+int event_ust_disable_tracepoint(struct ltt_ust_session *ustsession,
+ struct ltt_ust_channel *ustchan, char *event_name)
+{
+ int ret;
+ struct ltt_ust_event *ustevent;
+
+ ustevent = trace_ust_get_event_by_name(event_name, ustchan);
+ if (ustevent == NULL) {
+ ret = LTTCOMM_NO_EVENT;
+ goto end;
+ }
+ ret = ustctl_disable(ustsession->sock, ustevent->obj);
+ if (ret < 0) {
+ ret = LTTCOMM_UST_ENABLE_FAIL;
+ goto end;
+ }
+ ustevent->enabled = 0;
+ ret = LTTCOMM_OK;
+end:
+ return ret;
+}