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#! /usr/bin/env stap
#
# Copyright (C) 2018 Red Hat, Inc.
# By William Cohen, Red Hat Inc.
# wcohen@redhat.com
#
# USAGE: stap syscallerrorsbypid.stp --suppress-handler-errors
#
# The "--suppress-handler-errors" option allows the script to continue
# run when probes are skipped. The probe skips make the data less accurate,
# but are otherwise harmless.
global arr%[20000], sys%[20000]
global procname%
probe syscall_any {
sys[tid()] = syscall_nr
}
probe syscall_any.return {
if (tid() in sys && retval < 0 ) {
arr[pid(), sys[tid()], retval]++
procname[pid()] = execname()
}
delete sys[tid()]
}
probe scheduler.process_exit {
delete arr[pid(),*,*]
delete procname[pid()]
}
function process_name(pid) {
return sprintf("%s[%d]", procname[pid], pid)
}
probe prometheus {
@prometheus_dump_array3_map(arr, "syscall_error_count", "pid", "syscall", "error",
sprint, process_name, syscall_name, errno_str)
}
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