ktrace(1) on OpenBSD
The text a5a7a4d63d24, as OpenBSD 5.7, OpenBSD 5.6, OpenBSD 5.5, OpenBSD 5.4 shipped it.
enable kernel process tracing
Flags it lists
-
-B -
-C -
-a -
-c -
-d -
-f -
-g -
-i -
-p -
-t