struct processtop* add_proc(struct lttngtop *ctx, int pid, char *comm,
unsigned long timestamp);
struct processtop* update_proc(struct processtop* proc, int pid, int tid,
struct processtop* add_proc(struct lttngtop *ctx, int pid, char *comm,
unsigned long timestamp);
struct processtop* update_proc(struct processtop* proc, int pid, int tid,