(gdb) fr 0
#0 0x0000000000408137 in ngx_hash_wildcard_init (hinit=0x7fffffc06010, names=0x807c4e2c0, nelts=1) at src/core/ngx_hash.c:493
493 in src/core/ngx_hash.c
(gdb) p *hinit
$1 = {hash = 0x0, key = 0x408680 <ngx_hash_key_lc>, max_size = 4096, bucket_size = 2048, name = 0x4aec84 "server_names_hash",
pool = 0x801435000, temp_pool = 0x80784c000}
(gdb) p *names
$2 = {key = {len = 18446744073707016271, data = 0x807c4e078 "\210\236u\002\b"}, key_hash = 0, value = 0x802759e88}
(gdb)