TX_SIZE
v = (uint32_t *)((caddr_t)str + TX_SIZE(*v));
len = TX_SIZE(len);
len = TX_SIZE(len);
sz = TX_SIZE(sz);
bp += sizeof (uint32_t) + TX_SIZE(value_len);
sz = TX_SIZE(sz);
sz = TX_SIZE(sz);
sz = TX_SIZE(sz);
len = TX_SIZE(len + 1);
len = TX_SIZE(len);
assert(TX_SIZE(size) == size);