dwarf_add_frame_fde_b(3) on FreeBSD
The text 306320c0f5f1, as FreeBSD 12.0-RELEASE, FreeBSD 11.4-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE, FreeBSD 11.1-RELEASE, FreeBSD 11.0-RELEASE shipped it.
add a call frame descriptor to a DWARF producer instance