tools/lldbmacros/kauth.py

   1 """ Please make sure you read the README file COMPLETELY BEFORE reading anything below.
   2     It is very critical that you read coding guidelines in Section E in README file.
   3 """
   4
   5 from xnu import *
   6 from utils import *
   7
   8 # Macro: walkkauthcache
   9 @lldb_command('walkkauthcache')
  10 def WalkKauthCache(cmd_args=None):
  11     """ Walks the bins of the kauth credential hash cache and prints out the
  12         number of bins and bin usage information.
  13     """
  14     PrintKauthCache()
  15 # EndMacro: walkkauthcache
  16
  17 def PrintKauthCache(cmd_args=None):
  18     """ Routine to determine the size of the kauth cache, walk the bins
  19          and print out usage information.
  20     """
  21     anchor = unsigned(kern.globals.kauth_cred_table_anchor)
  22     alloc_info_struct = anchor - sizeof('struct _mhead')
  23     alloc_info = kern.GetValueFromAddress(alloc_info_struct, 'struct _mhead*')
  24     alloc_size = unsigned(alloc_info.mlen) - (sizeof('struct _mhead'))
  25     table_entries = alloc_size / sizeof('struct kauth_cred_entry_head')
  26     anchor = kern.globals.kauth_cred_table_anchor
  27     print "Cred cache has: " + str(table_entries) + " buckets\n"
  28     print "Number of items in each bucket ... \n"
  29     for i in range(0, table_entries):
  30         numinbucket = 0
  31         for kauth_cred in IterateTAILQ_HEAD(anchor[i], "cr_link"):
  32             numinbucket += 1
  33             #print str(kauth_cred.cr_posix)
  34             #print str(kauth_cred.cr_ref)
  35         print str(numinbucket) + "\n"