if (pid == -1) {
/* Track all pids: destroy tracker if exists. */
if (session->pid_tracker.ht) {
fini_pid_tracker(&session->pid_tracker);
/* Ensure all apps have session. */
if (pid == -1) {
/* Track all pids: destroy tracker if exists. */
if (session->pid_tracker.ht) {
fini_pid_tracker(&session->pid_tracker);
/* Ensure all apps have session. */