(gdb) p *(struct dirhash *)0xfffff80452eaf600
$168 = {
  dh_lock = {
    lock_object = {
      lo_name = 0xffffffff8154bbac "dirhash",
      lo_flags = 41091072,
      lo_data = 0,
      lo_witness = 0x0
    },
    sx_lock = 33
  },
  dh_refcount = 1,
  dh_hash = 0xfffff80320cc1580,
  dh_narrays = 8,
  dh_hlen = 2048,
  dh_hused = 959,
  dh_memreq = 8693,
  dh_blkfree = 0xfffff80452eb4150 "\002",
  dh_nblk = 45,
  dh_dirblks = 30,
  dh_firstfree = {1, -1, 0, -1, -1, -1, -1, 29, -1 <repeats 60 times>},
  dh_seqoff = 472,
  dh_score = 64,
  dh_onlist = 1,
  dh_lastused = 1623051228,
  dh_list = {
    tqe_next = 0xfffff80452ef4400,
    tqe_prev = 0xfffff80452ef3178
  }
}

(gdb) p ((struct dirhash *)0xfffff80452eaf600).dh_blkfree[29]
$169 = 7 '\a'