| Linux hosting5.siteguarding.com 3.10.0-962.3.2.lve1.5.88.el7.x86_64 #1 SMP Fri Sep 26 14:06:42 UTC 2025 x86_64 Path : /usr/share/systemtap/examples/general/ |
| Current File : //usr/share/systemtap/examples/general/varwatch.stp |
#!/usr/bin/stap
global var, varerr
probe $1 {
if (@defined($2)) {
try {
newvar = $2;
if (var[tid()] != newvar) {
printf("%s[%d] %s %s:\n", execname(), tid(), pp(), @2);
println(newvar);
var[tid()] = newvar;
}
} catch { varerr ++ } # error during $2 resolution or perhaps var[] assignment
}
}
probe kprocess.release { # if using per-thread checking
delete var[$p->pid] # thread
}
probe never {
var[0]="" # assigns a type to var in case no probes match $1 above
}
probe error,end {
if (varerr) printf("%s %s access errors: %d", @1, @2, varerr);
}