vm_map_inherit(9) on FreeBSD
The text 084f4c1bff8b, as FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE shipped it.
set fork inheritance flags for a range within a map
The text 084f4c1bff8b, as FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE shipped it.
set fork inheritance flags for a range within a map