tools/lldbmacros/core/kernelcore.py

   1
   2 """ Please make sure you read the README COMPLETELY BEFORE reading anything below.
   3     It is very critical that you read coding guidelines in Section E in README file.
   4 """
   5
   6 from cvalue import *
   7 from lazytarget import *
   8 from configuration import *
   9 from utils import *
  10 import caching
  11 import lldb
  12
  13 def IterateTAILQ_HEAD(headval, element_name):
  14     """ iterate over a TAILQ_HEAD in kernel. refer to bsd/sys/queue.h
  15         params:
  16             headval     - value : value object representing the head of the list
  17             element_name- str          :  string name of the field which holds the list links.
  18         returns:
  19             A generator does not return. It is used for iterating.
  20             value : an object that is of type as headval->tqh_first. Always a pointer object
  21         example usage:
  22           list_head = kern.GetGlobalVariable('mountlist')
  23           for entryobj in IterateTAILQ_HEAD(list_head, 'mnt_list'):
  24             print GetEntrySummary(entryobj)
  25     """
  26     iter_val = headval.tqh_first
  27     while unsigned(iter_val) != 0 :
  28         yield iter_val
  29         iter_val = iter_val.__getattr__(element_name).tqe_next
  30     #end of yield loop
  31
  32 def IterateLinkedList(element, field_name):
  33     """ iterate over a linked list.
  34         This is equivalent to elt = element; while(elt) { do_work(elt); elt = elt-><field_name>; }
  35         params:
  36             element - value : value object representing element in the list.
  37             field_name - str       : name of field that holds pointer to next element
  38         returns: Nothing. This is used as iterable
  39         example usage:
  40             first_zone = kern.GetGlobalVariable('first_zone')
  41             for zone in IterateLinkedList(first_zone, 'next_zone'):
  42                 print GetZoneSummary(zone)
  43     """
  44     elt = element
  45     while unsigned(elt) != 0:
  46         yield elt
  47         elt = elt.__getattr__(field_name)
  48     #end of while loop
  49
  50 def IterateListEntry(element, element_type, field_name, list_prefix=''):
  51     """ iterate over a list as defined with LIST_HEAD in bsd/sys/queue.h
  52         params:
  53             element      - value : Value object for lh_first
  54             element_type - str   : Type of the next element
  55             field_name   - str   : Name of the field in next element's structure
  56             list_prefix  - str   : use 's' here to iterate SLIST_HEAD instead
  57         returns:
  58             A generator does not return. It is used for iterating
  59             value  : an object thats of type (element_type) head->le_next. Always a pointer object
  60         example usage:
  61             headp = kern.globals.initproc.p_children
  62             for pp in IterateListEntry(headp, 'struct proc *', 'p_sibling'):
  63                 print GetProcInfo(pp)
  64     """
  65     elt = element.__getattr__(list_prefix + 'lh_first')
  66     if type(element_type) == str:
  67         element_type = gettype(element_type)
  68     while unsigned(elt) != 0:
  69         yield elt
  70         next_el = elt.__getattr__(field_name).__getattr__(list_prefix + 'le_next')
  71         elt = cast(next_el, element_type)
  72
  73 def IterateLinkageChain(queue_head, element_type, field_name, field_ofst=0):
  74     """ Iterate over a Linkage Chain queue in kernel of type queue_head_t. (osfmk/kern/queue.h method 1)
  75         This is equivalent to the qe_foreach_element() macro
  76         params:
  77             queue_head   - value       : Value object for queue_head.
  78             element_type - lldb.SBType : pointer type of the element which contains the queue_chain_t. Typically its structs like thread, task etc..
  79                          - str         : OR a string describing the type. ex. 'task *'
  80             field_name   - str         : Name of the field (in element) which holds a queue_chain_t
  81             field_ofst   - int         : offset from the 'field_name' (in element) which holds a queue_chain_t
  82                                          This is mostly useful if a particular element contains an array of queue_chain_t
  83         returns:
  84             A generator does not return. It is used for iterating.
  85             value  : An object thats of type (element_type). Always a pointer object
  86         example usage:
  87             coalq = kern.GetGlobalVariable('coalitions_q')
  88             for coal in IterateLinkageChain(coalq, 'struct coalition *', 'coalitions'):
  89                 print GetCoalitionInfo(coal)
  90     """
  91     global kern
  92     if type(element_type) == str:
  93         element_type = gettype(element_type)
  94
  95     if unsigned(queue_head) == 0:
  96         return
  97
  98     if element_type.IsPointerType():
  99         elem_ofst = getfieldoffset(element_type.GetPointeeType(), field_name) + field_ofst
 100     else:
 101         elem_ofst = getfieldoffset(element_type, field_name) + field_ofst
 102
 103     link = queue_head.next
 104     while (unsigned(link) != unsigned(queue_head)):
 105         addr = unsigned(link) - elem_ofst;
 106         # I can't use the GetValueFromAddress function of the kernel class
 107         # because I have no instance of that class!
 108         obj = value(link.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr)))
 109         obj = cast(obj, element_type)
 110         yield obj
 111         link = link.next
 112
 113
 114 def IterateQueue(queue_head, element_ptr_type, element_field_name, backwards=False, unpack_ptr_fn=None):
 115     """ Iterate over an Element Chain queue in kernel of type queue_head_t. (osfmk/kern/queue.h method 2)
 116         params:
 117             queue_head         - value : Value object for queue_head.
 118             element_ptr_type   - lldb.SBType : a pointer type of the element 'next' points to. Typically its structs like thread, task etc..
 119                                - str         : OR a string describing the type. ex. 'task *'
 120             element_field_name - str : name of the field in target struct.
 121             backwards          - backwards : traverse the queue backwards
 122             unpack_ptr_fn      - function : a function ptr of signature def unpack_ptr(long v) which returns long.
 123         returns:
 124             A generator does not return. It is used for iterating.
 125             value  : an object thats of type (element_type) queue_head->next. Always a pointer object
 126         example usage:
 127             for page_meta in IterateQueue(kern.globals.first_zone.pages.all_free, 'struct zone_page_metadata *', 'pages'):
 128                 print page_meta
 129     """
 130     if type(element_ptr_type) == str :
 131         element_ptr_type = gettype(element_ptr_type)
 132
 133     queue_head = queue_head.GetSBValue()
 134     queue_head_addr = 0x0
 135     if queue_head.TypeIsPointerType():
 136         queue_head_addr = queue_head.GetValueAsUnsigned()
 137     else:
 138         queue_head_addr = queue_head.GetAddress().GetLoadAddress(LazyTarget.GetTarget())
 139
 140     def unpack_ptr_and_recast(v):
 141         if unpack_ptr_fn is None:
 142             return v
 143         v_unpacked = unpack_ptr_fn(v.GetValueAsUnsigned())
 144         obj = v.CreateValueFromExpression(None,'(void *)'+str(v_unpacked))
 145         obj.Cast(element_ptr_type)
 146         return obj
 147
 148     if backwards:
 149         cur_elt = unpack_ptr_and_recast(queue_head.GetChildMemberWithName('prev'))
 150     else:
 151         cur_elt = unpack_ptr_and_recast(queue_head.GetChildMemberWithName('next'))
 152
 153     while True:
 154
 155         if not cur_elt.IsValid() or cur_elt.GetValueAsUnsigned() == 0 or cur_elt.GetValueAsUnsigned() == queue_head_addr:
 156             break
 157         elt = cur_elt.Cast(element_ptr_type)
 158         yield value(elt)
 159         if backwards:
 160             cur_elt = unpack_ptr_and_recast(elt.GetChildMemberWithName(element_field_name).GetChildMemberWithName('prev'))
 161         else:
 162             cur_elt = unpack_ptr_and_recast(elt.GetChildMemberWithName(element_field_name).GetChildMemberWithName('next'))
 163
 164
 165 def IterateRBTreeEntry(element, element_type, field_name):
 166     """ iterate over a rbtree as defined with RB_HEAD in libkern/tree.h
 167             element      - value : Value object for rbh_root
 168             element_type - str   : Type of the link element
 169             field_name   - str   : Name of the field in link element's structure
 170         returns:
 171             A generator does not return. It is used for iterating
 172             value  : an object thats of type (element_type) head->sle_next. Always a pointer object
 173     """
 174     elt = element.__getattr__('rbh_root')
 175     if type(element_type) == str:
 176         element_type = gettype(element_type)
 177
 178     # Walk to find min
 179     parent = elt
 180     while unsigned(elt) != 0:
 181         parent = elt
 182         elt = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type)
 183     elt = parent
 184
 185     # Now elt is min
 186     while unsigned(elt) != 0:
 187         yield elt
 188         # implementation cribbed from RB_NEXT in libkern/tree.h
 189         right = cast(elt.__getattr__(field_name).__getattr__('rbe_right'), element_type)
 190         if unsigned(right) != 0:
 191             elt = right
 192             left = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type)
 193             while unsigned(left) != 0:
 194                 elt = left
 195                 left = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type)
 196         else:
 197
 198             # avoid using GetValueFromAddress
 199             addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1
 200             parent = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr)))
 201             parent = cast(parent, element_type)
 202
 203             if unsigned(parent) != 0:
 204                 left = cast(parent.__getattr__(field_name).__getattr__('rbe_left'), element_type)
 205             if (unsigned(parent) != 0) and (unsigned(elt) == unsigned(left)):
 206                 elt = parent
 207             else:
 208                 if unsigned(parent) != 0:
 209                     right = cast(parent.__getattr__(field_name).__getattr__('rbe_right'), element_type)
 210                 while unsigned(parent) != 0 and (unsigned(elt) == unsigned(right)):
 211                     elt = parent
 212
 213                     # avoid using GetValueFromAddress
 214                     addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1
 215                     parent = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr)))
 216                     parent = cast(parent, element_type)
 217
 218                     right = cast(parent.__getattr__(field_name).__getattr__('rbe_right'), element_type)
 219
 220                 # avoid using GetValueFromAddress
 221                 addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1
 222                 elt = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr)))
 223                 elt = cast(elt, element_type)
 224
 225
 226 def IteratePriorityQueueEntry(root, element_type, field_name):
 227     """ iterate over a priority queue as defined with struct priority_queue from osfmk/kern/priority_queue.h
 228             root         - value : Value object for the priority queue
 229             element_type - str   : Type of the link element
 230             field_name   - str   : Name of the field in link element's structure
 231         returns:
 232             A generator does not return. It is used for iterating
 233             value  : an object thats of type (element_type). Always a pointer object
 234     """
 235     def _make_pqe(addr):
 236         return value(root.GetSBValue().CreateValueFromExpression(None,'(struct priority_queue_entry *)'+str(addr)))
 237
 238     queue = [unsigned(root.pq_root_packed) & ~3]
 239
 240     while len(queue):
 241         elt = _make_pqe(queue.pop())
 242
 243         while elt:
 244             yield containerof(elt, element_type, field_name)
 245             addr = unsigned(elt.child)
 246             if addr: queue.append(addr)
 247             elt = elt.next
 248
 249
 250 class KernelTarget(object):
 251     """ A common kernel object that provides access to kernel objects and information.
 252         The class holds global lists for  task, terminated_tasks, procs, zones, zombroc etc.
 253         It also provides a way to symbolicate an address or create a value from an address.
 254     """
 255     def __init__(self, debugger):
 256         """ Initialize the kernel debugging environment.
 257             Target properties like architecture and connectedness are lazy-evaluted.
 258         """
 259         self._debugger = debugger # This holds an lldb.SBDebugger object for debugger state
 260         self._threads_list = []
 261         self._tasks_list = []
 262         self._coalitions_list = []
 263         self._thread_groups = []
 264         self._allproc = []
 265         self._terminated_tasks_list = []
 266         self._zones_list = []
 267         self._zombproc_list = []
 268         self._kernel_types_cache = {} #this will cache the Type objects as and when requested.
 269         self._version = None
 270         self._arch = None
 271         self._ptrsize = None # pointer size of kernel, not userspace
 272         self.symbolicator = None
 273         class _GlobalVariableFind(object):
 274             def __init__(self, kern):
 275                 self._xnu_kernobj_12obscure12 = kern
 276             def __getattr__(self, name):
 277                 v = self._xnu_kernobj_12obscure12.GetGlobalVariable(name)
 278                 if not v.GetSBValue().IsValid():
 279                     raise ValueError('No such global variable by name: %s '%str(name))
 280                 return v
 281         self.globals = _GlobalVariableFind(self)
 282         LazyTarget.Initialize(debugger)
 283
 284     def _GetSymbolicator(self):
 285         """ Internal function: To initialize the symbolication from lldb.utils
 286         """
 287         if not self.symbolicator is None:
 288             return self.symbolicator
 289
 290         from lldb.utils import symbolication
 291         symbolicator = symbolication.Symbolicator()
 292         symbolicator.target = LazyTarget.GetTarget()
 293         self.symbolicator = symbolicator
 294         return self.symbolicator
 295
 296     def Symbolicate(self, addr):
 297         """ simple method to get name of function/variable from an address. this is equivalent of gdb 'output /a 0xaddress'
 298             params:
 299                 addr - int : typically hex value like 0xffffff80002c0df0
 300             returns:
 301                 str - '' if no symbol found else the symbol name.
 302             Note: this function only finds the first symbol. If you expect multiple symbol conflict please use SymbolicateFromAddress()
 303         """
 304         ret_str = ''
 305         syms = self.SymbolicateFromAddress(addr)
 306         if len(syms) > 0:
 307             ret_str +=syms[0].GetName()
 308         return ret_str
 309
 310     def SymbolicateFromAddress(self, addr):
 311         """ symbolicates any given address based on modules loaded in the target.
 312             params:
 313                 addr - int : typically hex value like 0xffffff80002c0df0
 314             returns:
 315                 [] of SBSymbol: In case we don't find anything than empty array is returned.
 316                       Note: a type of symbol can be figured out by gettype() function of SBSymbol.
 317             example usage:
 318                 syms = kern.Symbolicate(0xffffff80002c0df0)
 319                 for s in syms:
 320                   if s.GetType() == lldb.eSymbolTypeCode:
 321                     print "Function", s.GetName()
 322                   if s.GetType() == lldb.eSymbolTypeData:
 323                     print "Variable", s.GetName()
 324         """
 325         if type(int(1)) != type(addr):
 326             if str(addr).strip().find("0x") == 0 :
 327                 addr = int(addr, 16)
 328             else:
 329                 addr = int(addr)
 330         ret_array = []
 331         symbolicator = self._GetSymbolicator()
 332         syms = symbolicator.symbolicate(addr)
 333         if not syms:
 334             return ret_array
 335         for s in syms:
 336             ret_array.append(s.get_symbol_context().symbol)
 337         return ret_array
 338
 339     def IsDebuggerConnected(self):
 340         proc_state = LazyTarget.GetProcess().state
 341         if proc_state == lldb.eStateInvalid : return False
 342         if proc_state in [lldb.eStateStopped, lldb.eStateSuspended] : return True
 343
 344     def GetGlobalVariable(self, name):
 345         """ Get the value object representation for a kernel global variable
 346             params:
 347               name : str - name of the variable. ex. version
 348             returns: value - python object representing global variable.
 349             raises : Exception in case the variable is not found.
 350         """
 351         self._globals_cache_dict = caching.GetDynamicCacheData("kern._globals_cache_dict", {})
 352         if name not in self._globals_cache_dict:
 353             self._globals_cache_dict[name] = value(LazyTarget.GetTarget().FindGlobalVariables(name, 1).GetValueAtIndex(0))
 354         return self._globals_cache_dict[name]
 355
 356     def GetLoadAddressForSymbol(self, name):
 357         """ Get the load address of a symbol in the kernel.
 358             params:
 359               name : str - name of the symbol to lookup
 360             returns: int - the load address as an integer. Use GetValueFromAddress to cast to a value.
 361             raises : LookupError - if the symbol is not found.
 362         """
 363         name = str(name)
 364         target = LazyTarget.GetTarget()
 365         syms_arr = target.FindSymbols(name)
 366         if syms_arr.IsValid() and len(syms_arr) > 0:
 367             symbol = syms_arr[0].GetSymbol()
 368             if symbol.IsValid():
 369                 return int(symbol.GetStartAddress().GetLoadAddress(target))
 370
 371         raise LookupError("Symbol not found: " + name)
 372
 373     def GetValueFromAddress(self, addr, type_str = 'void *'):
 374         """ convert a address to value
 375             params:
 376                 addr - int : typically hex value like 0xffffff80008dc390
 377                 type_str - str: type to cast to. Default type will be void *
 378             returns:
 379                 value : a value object which has address as addr and type is type_str
 380         """
 381         obj = value(self.globals.version.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr)))
 382         obj = cast(obj, type_str)
 383         return obj
 384
 385     def GetValueAsType(self, v, t):
 386         """ Retrieves a global variable 'v' of type 't' wrapped in a vue object.
 387             If 'v' is an address, creates a vue object of the appropriate type.
 388             If 'v' is a name, looks for the global variable and asserts its type.
 389             Throws:
 390                 NameError - If 'v' cannot be found
 391                 TypeError - If 'v' is of the wrong type
 392         """
 393         if islong(v):
 394             return self.GetValueFromAddress(v, t)
 395         else:
 396             var = LazyTarget.GetTarget().FindGlobalVariables(v, 1)[0]
 397             if not var:
 398                 raise NameError("Failed to find global variable '{0}'".format(v))
 399             if var.GetTypeName() != t:
 400                 raise TypeError("{0} must be of type '{1}', not '{2}'".format(v, t, var.GetTypeName()))
 401             return value(var)
 402
 403     def _GetIterator(self, iter_head_name, next_element_name='next', iter_head_type=None):
 404         """ returns an iterator for a collection in kernel memory.
 405             params:
 406                 iter_head_name - str : name of queue_head or list head variable.
 407                 next_element_name - str : name of the element that leads to next element.
 408                                           for ex. in struct zone list 'next_zone' is the linking element.
 409             returns:
 410                 iterable : typically used in conjunction with "for varname in iterable:"
 411         """
 412         head_element = self.GetGlobalVariable(iter_head_name)
 413         return head_element.GetSBValue().linked_list_iter(next_element_name)
 414
 415     def TruncPage(self, addr):
 416         return (addr & ~(unsigned(self.GetGlobalVariable("page_size")) - 1))
 417
 418     def RoundPage(self, addr):
 419         return trunc_page(addr + unsigned(self.GetGlobalVariable("page_size")) - 1)
 420
 421     def StraddlesPage(self, addr, size):
 422         if size > unsigned(self.GetGlobalVariable("page_size")):
 423             return True
 424         val = ((addr + size) & (unsigned(self.GetGlobalVariable("page_size"))-1))
 425         return (val < size and val > 0)
 426
 427
 428     def PhysToKVARM64(self, addr):
 429         ptov_table = self.GetGlobalVariable('ptov_table')
 430         for i in range(0, self.GetGlobalVariable('ptov_index')):
 431             if (addr >= long(unsigned(ptov_table[i].pa))) and (addr < (long(unsigned(ptov_table[i].pa)) + long(unsigned(ptov_table[i].len)))):
 432                 return (addr - long(unsigned(ptov_table[i].pa)) + long(unsigned(ptov_table[i].va)))
 433         return (addr - unsigned(self.GetGlobalVariable("gPhysBase")) + unsigned(self.GetGlobalVariable("gVirtBase")))
 434
 435     def PhysToKernelVirt(self, addr):
 436         if self.arch == 'x86_64':
 437             return (addr + unsigned(self.GetGlobalVariable('physmap_base')))
 438         elif self.arch.startswith('arm64'):
 439             return self.PhysToKVARM64(addr)
 440         elif self.arch.startswith('arm'):
 441             return (addr - unsigned(self.GetGlobalVariable("gPhysBase")) + unsigned(self.GetGlobalVariable("gVirtBase")))
 442         else:
 443             raise ValueError("PhysToVirt does not support {0}".format(self.arch))
 444
 445     def GetNanotimeFromAbstime(self, abstime):
 446         """ convert absolute time (which is in MATUs) to nano seconds.
 447             Since based on architecture the conversion may differ.
 448             params:
 449                 abstime - int absolute time as shown by mach_absolute_time
 450             returns:
 451                 int - nanosecs of time
 452         """
 453         usec_divisor = caching.GetStaticCacheData("kern.rtc_usec_divisor", None)
 454         if not usec_divisor:
 455             if self.arch == 'x86_64':
 456                 usec_divisor = 1000
 457             else:
 458                 rtclockdata_addr = self.GetLoadAddressForSymbol('RTClockData')
 459                 rtc = self.GetValueFromAddress(rtclockdata_addr, 'struct _rtclock_data_ *')
 460                 usec_divisor = unsigned(rtc.rtc_usec_divisor)
 461             usec_divisor = int(usec_divisor)
 462             caching.SaveStaticCacheData('kern.rtc_usec_divisor', usec_divisor)
 463         nsecs = (abstime * 1000)/usec_divisor
 464         return nsecs
 465
 466     def __getattribute__(self, name):
 467         if name == 'zones' :
 468             self._zones_list = caching.GetDynamicCacheData("kern._zones_list", [])
 469             if len(self._zones_list) > 0: return self._zones_list
 470             zone_array = self.GetGlobalVariable('zone_array')
 471             for i in range(0, self.GetGlobalVariable('num_zones')):
 472                 self._zones_list.append(addressof(zone_array[i]))
 473             caching.SaveDynamicCacheData("kern._zones_list", self._zones_list)
 474             return self._zones_list
 475
 476         if name == 'threads' :
 477             self._threads_list = caching.GetDynamicCacheData("kern._threads_list", [])
 478             if len(self._threads_list) > 0 : return self._threads_list
 479             thread_queue_head = self.GetGlobalVariable('threads')
 480             thread_type = LazyTarget.GetTarget().FindFirstType('thread')
 481             thread_ptr_type = thread_type.GetPointerType()
 482             for th in IterateQueue(thread_queue_head, thread_ptr_type, 'threads'):
 483                 self._threads_list.append(th)
 484             caching.SaveDynamicCacheData("kern._threads_list", self._threads_list)
 485             return self._threads_list
 486
 487         if name == 'tasks' :
 488             self._tasks_list = caching.GetDynamicCacheData("kern._tasks_list", [])
 489             if len(self._tasks_list) > 0 : return self._tasks_list
 490             task_queue_head = self.GetGlobalVariable('tasks')
 491             task_type = LazyTarget.GetTarget().FindFirstType('task')
 492             task_ptr_type = task_type.GetPointerType()
 493             for tsk in IterateQueue(task_queue_head, task_ptr_type, 'tasks'):
 494                 self._tasks_list.append(tsk)
 495             caching.SaveDynamicCacheData("kern._tasks_list", self._tasks_list)
 496             return self._tasks_list
 497
 498         if name == 'coalitions' :
 499             self._coalitions_list = caching.GetDynamicCacheData("kern._coalitions_list", [])
 500             if len(self._coalitions_list) > 0 : return self._coalitions_list
 501             coalition_queue_head = self.GetGlobalVariable('coalitions_q')
 502             coalition_type = LazyTarget.GetTarget().FindFirstType('coalition')
 503             coalition_ptr_type = coalition_type.GetPointerType()
 504             for coal in IterateLinkageChain(addressof(coalition_queue_head), coalition_ptr_type, 'coalitions'):
 505                 self._coalitions_list.append(coal)
 506             caching.SaveDynamicCacheData("kern._coalitions_list", self._coalitions_list)
 507             return self._coalitions_list
 508
 509         if name == 'thread_groups' :
 510             self._thread_groups_list = caching.GetDynamicCacheData("kern._thread_groups_list", [])
 511             if len(self._thread_groups_list) > 0 : return self._thread_groups_list
 512             thread_groups_queue_head = self.GetGlobalVariable('tg_queue')
 513             thread_group_type = LazyTarget.GetTarget().FindFirstType('thread_group')
 514             thread_groups_ptr_type = thread_group_type.GetPointerType()
 515             for coal in IterateLinkageChain(addressof(thread_groups_queue_head), thread_groups_ptr_type, 'tg_queue_chain'):
 516                 self._thread_groups_list.append(coal)
 517             caching.SaveDynamicCacheData("kern._thread_groups_list", self._thread_groups_list)
 518             return self._thread_groups_list
 519
 520         if name == 'terminated_tasks' :
 521             self._terminated_tasks_list = caching.GetDynamicCacheData("kern._terminated_tasks_list", [])
 522             if len(self._terminated_tasks_list) > 0 : return self._terminated_tasks_list
 523             task_queue_head = self.GetGlobalVariable('terminated_tasks')
 524             task_type = LazyTarget.GetTarget().FindFirstType('task')
 525             task_ptr_type = task_type.GetPointerType()
 526             for tsk in IterateQueue(task_queue_head, task_ptr_type, 'tasks'):
 527                 self._terminated_tasks_list.append(tsk)
 528             caching.SaveDynamicCacheData("kern._terminated_tasks_list", self._terminated_tasks_list)
 529             return self._terminated_tasks_list
 530
 531         if name == 'procs' :
 532             self._allproc = caching.GetDynamicCacheData("kern._allproc", [])
 533             if len(self._allproc) > 0 : return self._allproc
 534             all_proc_head = self.GetGlobalVariable('allproc')
 535             proc_val = cast(all_proc_head.lh_first, 'proc *')
 536             while proc_val != 0:
 537                 self._allproc.append(proc_val)
 538                 proc_val = cast(proc_val.p_list.le_next, 'proc *')
 539             caching.SaveDynamicCacheData("kern._allproc", self._allproc)
 540             return self._allproc
 541
 542         if name == 'interrupt_stats' :
 543             self._interrupt_stats_list = caching.GetDynamicCacheData("kern._interrupt_stats_list", [])
 544             if len(self._interrupt_stats_list) > 0 : return self._interrupt_stats_list
 545             interrupt_stats_head = self.GetGlobalVariable('gInterruptAccountingDataList')
 546             interrupt_stats_type = LazyTarget.GetTarget().FindFirstType('IOInterruptAccountingData')
 547             interrupt_stats_ptr_type = interrupt_stats_type.GetPointerType()
 548             for interrupt_stats_obj in IterateQueue(interrupt_stats_head, interrupt_stats_ptr_type, 'chain'):
 549                 self._interrupt_stats_list.append(interrupt_stats_obj)
 550             caching.SaveDynamicCacheData("kern._interrupt_stats", self._interrupt_stats_list)
 551             return self._interrupt_stats_list
 552
 553         if name == 'zombprocs' :
 554             self._zombproc_list = caching.GetDynamicCacheData("kern._zombproc_list", [])
 555             if len(self._zombproc_list) > 0 : return self._zombproc_list
 556             zproc_head = self.GetGlobalVariable('zombproc')
 557             proc_val = cast(zproc_head.lh_first, 'proc *')
 558             while proc_val != 0:
 559                 self._zombproc_list.append(proc_val)
 560                 proc_val = cast(proc_val.p_list.le_next, 'proc *')
 561             caching.SaveDynamicCacheData("kern._zombproc_list", self._zombproc_list)
 562             return self._zombproc_list
 563
 564         if name == 'version' :
 565             self._version = caching.GetStaticCacheData("kern.version", None)
 566             if self._version != None : return self._version
 567             self._version = str(self.GetGlobalVariable('version'))
 568             caching.SaveStaticCacheData("kern.version", self._version)
 569             return self._version
 570
 571         if name == 'arch' :
 572             self._arch = caching.GetStaticCacheData("kern.arch", None)
 573             if self._arch != None : return self._arch
 574             arch = LazyTarget.GetTarget().triple.split('-')[0]
 575             if arch in ('armv7', 'armv7s', 'armv7k'):
 576                 self._arch = 'arm'
 577             else:
 578                 self._arch = arch
 579             caching.SaveStaticCacheData("kern.arch", self._arch)
 580             return self._arch
 581
 582         if name == 'ptrsize' :
 583             self._ptrsize = caching.GetStaticCacheData("kern.ptrsize", None)
 584             if self._ptrsize != None : return self._ptrsize
 585             arch = LazyTarget.GetTarget().triple.split('-')[0]
 586             if arch == 'x86_64' or arch.startswith('arm64'):
 587                 self._ptrsize = 8
 588             else:
 589                 self._ptrsize = 4
 590             caching.SaveStaticCacheData("kern.ptrsize", self._ptrsize)
 591             return self._ptrsize
 592
 593         if name == 'VM_MIN_KERNEL_ADDRESS':
 594             if self.arch == 'x86_64':
 595                 return unsigned(0xFFFFFF8000000000)
 596             elif self.arch.startswith('arm64'):
 597                 return unsigned(0xffffffe000000000)
 598             else:
 599                 return unsigned(0x80000000)
 600
 601         if name == 'VM_MIN_KERNEL_AND_KEXT_ADDRESS':
 602             if self.arch == 'x86_64':
 603                 return self.VM_MIN_KERNEL_ADDRESS - 0x80000000
 604             else:
 605                 return self.VM_MIN_KERNEL_ADDRESS
 606
 607         return object.__getattribute__(self, name)