tools/lldbmacros/ulock.py

   1 from xnu import *
   2 from scheduler import GetRecentTimestamp
   3 import xnudefines
   4
   5 ulock_types = {
   6     1: "COMPARE_AND_WAIT",
   7     2: "UNFAIR_LOCK",
   8     3: "UNFAIR_LOCK64_SHARED",
   9     4: "COMPARE_AND_WAIT64",
  10     5: "COMPARE_AND_WAIT64_SHARED"
  11 }
  12
  13 @header("{:<20s} {:<20s} {:<20s} {:<10s} {:<20s} {:<20s} {:<20s}".format(
  14     'ull_t', 'kind', 'addr/obj', 'pid/offs', 'owner', 'turnstile', 'waiters'))
  15 def GetUlockSummary(ull):
  16     code = int(ull.ull_opcode)
  17     if ulock_types.has_key(code):
  18         ull_type = ulock_types[code]
  19     else:
  20         ull_type = "{:#x}".format(code)
  21
  22     s = "{ull: <#20x} {ull_type: <20s}".format(ull=ull, ull_type=ull_type)
  23     ulk=ull.ull_key
  24     if int(ulk.ulk_key_type) is 1:
  25         s += " {ulk.ulk_addr: <#20x} {ulk.ulk_pid: <10d}".format(ulk=ulk)
  26     elif int(ulk.ulk_key_type) is 2:
  27         s += " {ulk.ulk_object: <#20x} {ulk.ulk_offset: <10d}".format(ulk=ulk)
  28     else:
  29         s += " {:<20s} {:<10s}".format("", "")
  30
  31     return s + " {ull.ull_owner: <#20x} {ull.ull_turnstile: <#20x} {ull.ull_nwaiters: >7d}".format(ull=ull)
  32
  33 @lldb_command('showallulocks', fancy=True)
  34 def ShowAllUlocks(cmd_args=None, cmd_options={}, O=None):
  35     """ Display a summary of all the ulocks in the system
  36
  37         usage: showallulocks
  38     """
  39
  40     with O.table(GetUlockSummary.header):
  41         count = kern.globals.ull_hash_buckets;
  42         buckets = kern.globals.ull_bucket
  43         for i in xrange(0, count):
  44             for ull in IterateLinkageChain(addressof(buckets[i].ulb_head), 'ull_t *', 'ull_hash_link'):
  45                 print GetUlockSummary(ull)