This is xnu-12377.1.9. See this file in:
Directory listing for xnu-12377.1.9//tests/vfs
devfd_access.c
devfd_access.entitlements
direntries_permissions.c
fmount_funmount.c
freeable_vnodes.c
getattrlist_fstype.c
getattrlist_fullpath.c
getattrlist_mountextflags.c
linkat_flags.c
longpaths.c
longpaths.entitlements
lseek.c
named_fork_path.c
o_search.c
open_symlink.c
open_unique.c
openbyid_stress.c
openbyid_stress.entitlements
resolve_beneath.c
resolve_namespace.c
sandbox_appledouble_write.c
sandbox_fstat.c
sandbox_type_error.c
statfs_ext.c
symlink_trailing_slash.c
unlinkat_nodeletebusy.c
volfs_chroot.c