Edit File: watchdog.stp
#!/usr/bin/stap /* * watchdog.stp * usage: stap watchdog.stp start_event stop_event time_ms */ global active, count function trigger(p:long) { /* may want to change the action here */ event=sprintf("/usr/bin/pstack %d", p); system(event); } probe $1 { active[pid()]=1 } probe $2 { delete active[pid()]; delete count[pid()]} probe timer.ms($3) { foreach (p in active) { count[p]++ if (count[p] == 2) trigger(p) } }