ktrace(1) on OpenBSD
The text 38d220c7952d, as OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9 shipped it.
enable kernel process tracing
Flags it lists
-
-C -
-a -
-c -
-d -
-f -
-g -
-i -
-p -
-t