""" Please make sure you read the README file COMPLETELY BEFORE reading anything below.
It is very critical that you read coding guidelines in Section E in README file.
"""
from xnu import *
from utils import *
@lldb_command('walkkauthcache')
def WalkKauthCache(cmd_args=None):
""" Walks the bins of the kauth credential hash cache and prints out the
number of bins and bin usage information.
"""
PrintKauthCache()
def PrintKauthCache(cmd_args=None):
""" Routine to determine the size of the kauth cache, walk the bins
and print out usage information.
"""
anchor = unsigned(kern.globals.kauth_cred_table_anchor)
alloc_info_struct = anchor - sizeof('struct _mhead')
alloc_info = kern.GetValueFromAddress(alloc_info_struct, 'struct _mhead*')
alloc_size = unsigned(alloc_info.mlen) - (sizeof('struct _mhead'))
table_entries = alloc_size / sizeof('struct kauth_cred_entry_head')
anchor = kern.globals.kauth_cred_table_anchor
print "Cred cache has: " + str(table_entries) + " buckets\n"
print "Number of items in each bucket ... \n"
for i in range(0, table_entries):
numinbucket = 0
for kauth_cred in IterateTAILQ_HEAD(anchor[i], "cr_link"):
numinbucket += 1
print str(numinbucket) + "\n"