int context_kernel_add(struct ltt_kernel_session *ksession,
struct lttng_event_context *ctx, char *event_name, char *channel_name);
int context_ust_add(struct ltt_ust_session *ustsession,
int context_kernel_add(struct ltt_kernel_session *ksession,
struct lttng_event_context *ctx, char *event_name, char *channel_name);
int context_ust_add(struct ltt_ust_session *ustsession,