from xnu import *
from utils import *
from process import *
from pmap import *
import struct
def GetBinaryNameForPC(pc_val, user_lib_info = None):
""" find the binary in user_lib_info that the passed pc_val falls in range of.
params:
pc_val : int - integer form of the pc address
user_lib_info: [] of [] which hold start, end, binary name
returns:
str - Name of binary or "unknown" if not found.
"""
retval = "unknown"
if not user_lib_info:
return retval
matches = []
for info in user_lib_info:
if pc_val >= info[0] and pc_val <= info[1]:
matches.append((pc_val - info[0], info[2]))
matches.sort()
if matches:
retval = matches[0][1]
return retval
def ShowX86UserStack(thread, user_lib_info = None):
""" Display user space stack frame and pc addresses.
params:
thread: obj referencing thread value
returns:
Nothing
"""
iss = Cast(thread.machine.iss, 'x86_saved_state_t *')
abi = int(iss.flavor)
user_ip = 0
user_frame = 0
user_abi_ret_offset = 0
if abi == 0xf:
debuglog("User process is 64 bit")
user_ip = iss.uss.ss_64.isf.rip
user_frame = iss.uss.ss_64.rbp
user_abi_ret_offset = 8
user_abi_type = "uint64_t"
else:
debuglog("user process is 32 bit")
user_ip = iss.uss.ss_32.eip
user_frame = iss.uss.ss_32.ebp
user_abi_ret_offset = 4
user_abi_type = "uint32_t"
if user_ip == 0:
print "This activation does not appear to have a valid user context."
return False
cur_ip = user_ip
cur_frame = user_frame
debuglog("ip= 0x%x , fr = 0x%x " % (cur_ip, cur_frame))
frameformat = "{0:d} FP: 0x{1:x} PC: 0x{2:x}"
if user_lib_info is not None:
frameformat = "{0:d} {3: <30s} 0x{2:x}"
print frameformat.format(0, cur_frame, cur_ip, GetBinaryNameForPC(cur_ip, user_lib_info))
print kern.Symbolicate(cur_ip)
frameno = 0
while True:
frameno = frameno + 1
frame = GetUserDataAsString(thread.task, unsigned(cur_frame), user_abi_ret_offset*2)
cur_ip = _ExtractDataFromString(frame, user_abi_ret_offset, user_abi_type)
cur_frame = _ExtractDataFromString(frame, 0, user_abi_type)
if not cur_frame or cur_frame == 0x0000000800000008:
break
print frameformat.format(frameno, cur_frame, cur_ip, GetBinaryNameForPC(cur_ip, user_lib_info))
print kern.Symbolicate(cur_ip)
return
def _PrintARMUserStack(task, cur_pc, cur_fp, framesize, frametype, frameformat, user_lib_info=None):
if cur_pc == 0:
"No valid user context for this activation."
return
frameno = 0
print frameformat.format(frameno, cur_fp, cur_pc, GetBinaryNameForPC(cur_pc, user_lib_info))
while True:
frameno = frameno + 1
frame = GetUserDataAsString(task, cur_fp, framesize)
cur_fp = _ExtractDataFromString(frame, 0, frametype)
cur_pc = _ExtractDataFromString(frame, (framesize / 2), frametype)
if not cur_fp:
break
print frameformat.format(frameno, cur_fp, cur_pc, GetBinaryNameForPC(cur_pc, user_lib_info))
def ShowARMUserStack(thread, user_lib_info = None):
cur_pc = unsigned(thread.machine.PcbData.pc)
cur_fp = unsigned(thread.machine.PcbData.r[7])
frameformat = "{0:>2d} FP: 0x{1:x} PC: 0x{2:x}"
if user_lib_info is not None:
frameformat = "{0:>2d} {3: <30s} 0x{2:0>8x}"
framesize = 8
frametype = "uint32_t"
_PrintARMUserStack(thread.task, cur_pc, cur_fp, framesize, frametype, frameformat, user_lib_info=user_lib_info)
def ShowARM64UserStack(thread, user_lib_info = None):
SAVED_STATE_FLAVOR_ARM=20
SAVED_STATE_FLAVOR_ARM64=21
upcb = thread.machine.upcb
flavor = upcb.ash.flavor
frameformat = "{0:>2d} FP: 0x{1:x} PC: 0x{2:x}"
if flavor == SAVED_STATE_FLAVOR_ARM64:
cur_pc = unsigned(upcb.uss.ss_64.pc)
cur_fp = unsigned(upcb.uss.ss_64.fp)
if user_lib_info is not None:
frameformat = "{0:>2d} {3: <30s} 0x{2:x}"
framesize = 16
frametype = "uint64_t"
elif flavor == SAVED_STATE_FLAVOR_ARM:
cur_pc = unsigned(upcb.uss.ss_32.pc)
cur_fp = unsigned(upcb.uss.ss_32.r[7])
if user_lib_info is not None:
frameformat = "{0:>2d}: {3: <30s} 0x{2:x}"
framesize = 8
frametype = "uint32_t"
else:
raise RuntimeError("Thread {0} has an invalid flavor {1}".format(unsigned(thread), flavor))
_PrintARMUserStack(thread.task, cur_pc, cur_fp, framesize, frametype, frameformat, user_lib_info=user_lib_info)
@lldb_command('showthreaduserstack')
def ShowThreadUserStack(cmd_args=None):
""" Show user stack for a given thread.
Syntax: (lldb) showthreaduserstack <thread_ptr>
"""
if not cmd_args:
raise ArgumentError("Insufficient arguments")
thread = kern.GetValueFromAddress(ArgumentStringToInt(cmd_args[0]), 'thread *')
if kern.arch == "x86_64":
ShowX86UserStack(thread)
elif kern.arch == "arm":
ShowARMUserStack(thread)
elif kern.arch == "arm64":
ShowARM64UserStack(thread)
return True
@lldb_command('printuserdata','XO:')
def PrintUserspaceData(cmd_args=None, cmd_options={}):
""" Read userspace data for given task and print based on format provided.
Syntax: (lldb) printuserdata <task_t> <uspace_address> <format_specifier>
params:
<task_t> : pointer to task
<uspace_address> : address to user space memory
<format_specifier> : String representation for processing the data and printing it.
e.g Q -> unsigned long long, q -> long long, I -> unsigned int, i -> int
10i -> 10 ints, 20s -> 20 character string, s -> null terminated string
See: https://docs.python.org/2/library/struct.html#format-characters
options:
-X : print all values in hex.
-O <file path>: Save data to file
"""
if not cmd_args or len(cmd_args) < 3:
raise ArgumentError("Insufficient arguments")
task = kern.GetValueFromAddress(cmd_args[0], 'task *')
uspace_addr = ArgumentStringToInt(cmd_args[1])
format_specifier_str = cmd_args[2]
user_data_len = 0
if format_specifier_str == "s":
print "0x%x: " % uspace_addr + GetUserspaceString(task, uspace_addr)
return True
try:
user_data_len = struct.calcsize(format_specifier_str)
except Exception, e:
raise ArgumentError("Invalid format specifier provided.")
user_data_string = GetUserDataAsString(task, uspace_addr, user_data_len)
if not user_data_string:
print "Could not read any data from userspace address."
return False
if "-O" in cmd_options:
fh = open(cmd_options["-O"],"w")
fh.write(user_data_string)
fh.close()
print "Written %d bytes to %s." % (user_data_len, cmd_options['-O'])
return True
upacked_data = struct.unpack(format_specifier_str, user_data_string)
element_size = user_data_len / len(upacked_data)
for i in range(len(upacked_data)):
if "-X" in cmd_options:
print "0x%x: " % (uspace_addr + i*element_size) + hex(upacked_data[i])
else:
print "0x%x: " % (uspace_addr + i*element_size) + str(upacked_data[i])
return True
@lldb_command('showtaskuserargs')
def ShowTaskUserArgs(cmd_args=None, cmd_options={}):
""" Read the process argv, env, and apple strings from the user stack
Syntax: (lldb) showtaskuserargs <task_t>
params:
<task_t> : pointer to task
"""
if not cmd_args or len(cmd_args) != 1:
raise ArgumentError("Insufficient arguments")
task = kern.GetValueFromAddress(cmd_args[0], 'task *')
proc = Cast(task.bsd_info, 'proc *')
format_string = "Q" if kern.ptrsize == 8 else "I"
string_area_size = proc.p_argslen
string_area_addr = proc.user_stack - string_area_size
string_area = GetUserDataAsString(task, string_area_addr, string_area_size)
if not string_area:
print "Could not read any data from userspace address."
return False
i = 0
pos = string_area_addr - kern.ptrsize
for name in ["apple", "env", "argv"] :
while True:
if name == "argv" :
if i == proc.p_argc:
break
i += 1
pos -= kern.ptrsize
user_data_string = GetUserDataAsString(task, pos, kern.ptrsize)
ptr = struct.unpack(format_string, user_data_string)[0]
if ptr == 0:
break
if string_area_addr <= ptr and ptr < string_area_addr+string_area_size :
string_offset = ptr - string_area_addr
string = string_area[string_offset:];
else:
string = GetUserspaceString(task, ptr)
print name + "[]: " + string
return True
@lldb_command('showtaskuserstacks')
def ShowTaskUserStacks(cmd_args=None):
""" Print out the user stack for each thread in a task, followed by the user libraries.
Syntax: (lldb) showtaskuserstacks <task_t>
The format is compatible with CrashTracer. You can also use the speedtracer plugin as follows
(lldb) showtaskuserstacks <task_t> -p speedtracer
Note: the address ranges are approximations. Also the list may not be completely accurate. This command expects memory read failures
and hence will skip a library if unable to read information. Please use your good judgement and not take the output as accurate
"""
if not cmd_args:
raise ArgumentError("Insufficient arguments")
task = kern.GetValueFromAddress(cmd_args[0], 'task *')
pval = Cast(task.bsd_info, 'proc *')
crash_report_format_string = """\
Process: {pid: <10d}
Path: {path: <50s}
Identifier: {pname: <30s}
Version: ??? (???)
Code Type: {parch: <20s}
Parent Process: {ppname: >20s}[{ppid:d}]
Date/Time: {timest:s}.000 -0800
OS Version: {osversion: <20s}
Report Version: 8
Exception Type: n/a
Exception Codes: n/a
Crashed Thread: 0
Application Specific Information:
Synthetic crash log generated from Kernel userstacks
"""
user_lib_rex = re.compile("([0-9a-fx]+)\s-\s([0-9a-fx]+)\s+(.*?)\s", re.IGNORECASE|re.MULTILINE)
from datetime import datetime
ts = datetime.fromtimestamp(int(pval.p_start.tv_sec))
date_string = ts.strftime('%Y-%m-%d %H:%M:%S')
is_64 = False
if pval.p_flag & 0x4 :
is_64 = True
parch_s = ""
if kern.arch == "x86_64" or kern.arch == "i386":
osversion = "Mac OS X 10.8"
parch_s = "I386 (32 bit)"
if is_64:
parch_s = "X86-64 (Native)"
else:
parch_s = kern.arch
osversion = "iOS"
osversion += " ({:s})".format(kern.globals.osversion)
print crash_report_format_string.format(pid = pval.p_pid,
pname = pval.p_comm,
path = pval.p_comm,
ppid = pval.p_ppid,
ppname = GetProcNameForPid(pval.p_ppid),
timest = date_string,
parch = parch_s,
osversion = osversion
)
print "Binary Images:"
ShowTaskUserLibraries([hex(task)])
usertask_lib_info = [] for entry in ShowTaskUserLibraries.found_images:
arr = user_lib_rex.findall(entry[3])
if len(arr) == 0 :
continue
usertask_lib_info.append([int(arr[0][0],16), int(arr[0][1],16), str(arr[0][2]).strip()])
printthread_user_stack_ptr = ShowX86UserStack
if kern.arch == "arm":
printthread_user_stack_ptr = ShowARMUserStack
elif kern.arch =="arm64":
printthread_user_stack_ptr = ShowARM64UserStack
counter = 0
for thval in IterateQueue(task.threads, 'thread *', 'task_threads'):
print "\nThread {0:d} name:0x{1:x}\nThread {0:d}:".format(counter, thval)
counter += 1
try:
printthread_user_stack_ptr(thval, usertask_lib_info)
except Exception as exc_err:
print "Failed to show user stack for thread 0x{0:x}".format(thval)
if config['debug']:
raise exc_err
else:
print "Enable debugging ('(lldb) xnudebug debug') to see detailed trace."
return
def GetUserDataAsString(task, addr, size):
""" Get data from task's address space as a string of bytes
params:
task: task object from which to extract information
addr: int - start address to get data from.
size: int - no of bytes to read.
returns:
str - a stream of bytes. Empty string if read fails.
"""
err = lldb.SBError()
if GetConnectionProtocol() == "kdp":
kdp_pmap_addr = unsigned(addressof(kern.globals.kdp_pmap))
if not WriteInt64ToMemoryAddress(unsigned(task.map.pmap), kdp_pmap_addr):
debuglog("Failed to write in kdp_pmap from GetUserDataAsString.")
return ""
content = LazyTarget.GetProcess().ReadMemory(addr, size, err)
if not err.Success():
debuglog("Failed to read process memory. Error: " + err.description)
return ""
if not WriteInt64ToMemoryAddress(0, kdp_pmap_addr):
debuglog("Failed to reset in kdp_pmap from GetUserDataAsString.")
return ""
elif kern.arch in ['arm', 'arm64', 'x86_64'] and long(size) < (2 * kern.globals.page_size):
range1_addr = long(addr)
range1_size = long(size)
if kern.StraddlesPage(range1_addr, range1_size):
range2_addr = long(kern.TruncPage(range1_addr + range1_size))
range2_size = long(range1_addr + range1_size - range2_addr)
range1_size = long(range2_addr - range1_addr)
else:
range2_addr = 0
range2_size = 0
range2_in_kva = 0
paddr_range1 = PmapWalk(task.map.pmap, range1_addr, vSILENT)
if not paddr_range1:
debuglog("Not mapped task 0x{:x} address 0x{:x}".format(task, addr))
return ""
range1_in_kva = kern.PhysToKernelVirt(paddr_range1)
content = LazyTarget.GetProcess().ReadMemory(range1_in_kva, range1_size, err)
if not err.Success():
raise RuntimeError("Failed to read process memory. Error: " + err.description)
if range2_addr:
paddr_range2 = PmapWalk(task.map.pmap, range2_addr, vSILENT)
if not paddr_range2:
debuglog("Not mapped task 0x{:x} address 0x{:x}".format(task, addr))
return ""
range2_in_kva = kern.PhysToKernelVirt(paddr_range2)
content += LazyTarget.GetProcess().ReadMemory(range2_in_kva, range2_size, err)
if not err.Success():
raise RuntimeError("Failed to read process memory. Error: " + err.description)
else:
raise NotImplementedError("GetUserDataAsString does not support this configuration")
return content
def _ExtractDataFromString(strdata, offset, data_type, length=0):
""" Extract specific data from string buffer
params:
strdata: str - string data give from GetUserDataAsString
offset: int - 0 based offset into the data.
data_type: str - defines what type to be read as. Supported values are:
'uint64_t', 'uint32_t', 'string'
length: int - used when data_type=='string'
returns
None - if extraction failed.
obj - based on what is requested in data_type
"""
unpack_str = "s"
if data_type == 'uint64_t':
length = 8
unpack_str = "Q"
elif data_type == "uint32_t":
length = 4
unpack_str = "I"
else:
unpack_str= "%ds" % length
data_len = len(strdata)
if offset > data_len or (offset + length) > data_len or offset < 0:
debuglog("Invalid arguments to _ExtractDataFromString.")
return 0
return struct.unpack(unpack_str, strdata[offset:(offset + length)])[0]
def GetUserspaceString(task, string_address):
""" Maps 32 bytes at a time and packs as string
params:
task: obj - referencing task to read data from
string_address: int - address where the image path is stored
returns:
str - string path of the file. "" if failed to read.
"""
done = False
retval = ""
if string_address == 0:
done = True
while not done:
str_data = GetUserDataAsString(task, string_address, 32)
if len(str_data) == 0:
break
i = 0
while i < 32:
if ord(str_data[i]):
retval += str_data[i]
else:
break
i += 1
if i < 32:
done = True
else:
string_address += 32
return retval
def GetImageInfo(task, mh_image_address, mh_path_address, approx_end_address=None):
""" Print user library informaiton.
params:
task : obj referencing the task for which Image info printed
mh_image_address : int - address which has image info
mh_path_address : int - address which holds path name string
approx_end_address: int - address which lldbmacros think is end address.
returns:
str - string representing image info. "" if failure to read data.
"""
if approx_end_address:
image_end_load_address = int(approx_end_address) -1
else:
image_end_load_address = int(mh_image_address) + 0xffffffff
print_format = "0x{0:x} - 0x{1:x} {2: <50s} (??? - ???) <{3: <36s}> {4: <50s}"
mh_data = GetUserDataAsString(task, mh_image_address, 32)
if len(mh_data) == 0:
debuglog("unable to get userdata for task 0x{:x} img_addr 0x{:x} path_address 0x{:x}".format(
task, mh_image_address, mh_path_address))
return ""
mh_magic = _ExtractDataFromString(mh_data, (4 * 0), "uint32_t")
mh_cputype = _ExtractDataFromString(mh_data,(4 * 1), "uint32_t")
mh_cpusubtype = _ExtractDataFromString(mh_data,(4 * 2), "uint32_t")
mh_filetype = _ExtractDataFromString(mh_data,(4 * 3), "uint32_t")
mh_ncmds = _ExtractDataFromString(mh_data,(4 * 4), "uint32_t")
mh_sizeofcmds = _ExtractDataFromString(mh_data,(4 * 5), "uint32_t")
mh_flags = _ExtractDataFromString(mh_data,(4 * 6), "uint32_t")
if mh_magic == 0xfeedfacf:
mh_64 = True
lc_address = mh_image_address + 32
else:
mh_64 = False
lc_address = mh_image_address + 28
lc_idx = 0
uuid_data = 0
found_uuid_data = False
retval = None
while lc_idx < mh_ncmds:
lcmd_data = GetUserDataAsString(task, lc_address, 24)
lc_cmd = _ExtractDataFromString(lcmd_data, 4 * 0, "uint32_t")
lc_cmd_size = _ExtractDataFromString(lcmd_data, 4 * 1, "uint32_t")
lc_data = _ExtractDataFromString(lcmd_data, 4*2, "string", 16)
uuid_out_string = ""
path_out_string = ""
if lc_cmd == 0x1b:
uuid_data = [ord(x) for x in lc_data]
found_uuid_data = True
uuid_out_string = "{a[0]:02X}{a[1]:02X}{a[2]:02X}{a[3]:02X}-{a[4]:02X}{a[5]:02X}-{a[6]:02X}{a[7]:02X}-{a[8]:02X}{a[9]:02X}-{a[10]:02X}{a[11]:02X}{a[12]:02X}{a[13]:02X}{a[14]:02X}{a[15]:02X}".format(a=uuid_data)
path_out_string = GetUserspaceString(task, mh_path_address)
path_base_name = path_out_string.split("/")[-1]
retval = print_format.format(mh_image_address, image_end_load_address, path_base_name, uuid_out_string, path_out_string)
elif lc_cmd == 0xe:
ShowTaskUserLibraries.exec_load_path = lc_address + _ExtractDataFromString(lcmd_data, 4*2, "uint32_t")
debuglog("Found load command to be 0xe for address %s" % hex(ShowTaskUserLibraries.exec_load_path))
lc_address = lc_address + lc_cmd_size
lc_idx += 1
if not found_uuid_data:
path_out_string = GetUserspaceString(task, mh_path_address)
path_base_name = path_out_string.split("/")[-1]
uuid_out_string = ""
retval = print_format.format(mh_image_address, image_end_load_address, path_base_name, uuid_out_string, path_out_string)
return retval
@static_var("found_images", []) @static_var("exec_load_path", 0)
@lldb_command("showtaskuserlibraries")
def ShowTaskUserLibraries(cmd_args=None):
""" Show binary images known by dyld in target task
For a given user task, inspect the dyld shared library state and print information about all Mach-O images.
Syntax: (lldb)showtaskuserlibraries <task_t>
Note: the address ranges are approximations. Also the list may not be completely accurate. This command expects memory read failures
and hence will skip a library if unable to read information. Please use your good judgement and not take the output as accurate
"""
if not cmd_args:
raise ArgumentError("Insufficient arguments")
ShowTaskUserLibraries.found_images = []
task = kern.GetValueFromAddress(cmd_args[0], 'task_t')
is_task_64 = int(task.t_flags) & 0x1
dyld_all_image_infos_address = unsigned(task.all_image_info_addr)
debuglog("dyld_all_image_infos_address = %s" % hex(dyld_all_image_infos_address))
cur_data_offset = 0
if dyld_all_image_infos_address == 0:
print "No dyld shared library information available for task"
return False
debuglog("Extracting version information.")
vers_info_data = GetUserDataAsString(task, dyld_all_image_infos_address, 112)
version = _ExtractDataFromString(vers_info_data, cur_data_offset, "uint32_t")
cur_data_offset += 4
if version > 14:
print "Unknown dyld all_image_infos version number %d" % version
image_info_count = _ExtractDataFromString(vers_info_data, cur_data_offset, "uint32_t")
debuglog("version = %d count = %d is_task_64 = %s" % (version, image_info_count, repr(is_task_64)))
ShowTaskUserLibraries.exec_load_path = 0
if is_task_64:
image_info_size = 24
image_info_array_address = _ExtractDataFromString(vers_info_data, 8, "uint64_t")
dyld_load_address = _ExtractDataFromString(vers_info_data, 8*4, "uint64_t")
dyld_all_image_infos_address_from_struct = _ExtractDataFromString(vers_info_data, 8*13, "uint64_t")
else:
image_info_size = 12
image_info_array_address = _ExtractDataFromString(vers_info_data, 4*2, "uint32_t")
dyld_load_address = _ExtractDataFromString(vers_info_data, 4*5, "uint32_t")
dyld_all_image_infos_address_from_struct = _ExtractDataFromString(vers_info_data, 4*14, "uint32_t")
dyld_load_address = dyld_load_address + (dyld_all_image_infos_address - dyld_all_image_infos_address_from_struct)
i = 0
image_info_list = []
while i < image_info_count:
image_info_address = image_info_array_address + i * image_info_size
debuglog("i = %d, image_info_address = %s, image_info_size = %d" % (i, hex(image_info_address), image_info_size))
n_im_info_addr = None
img_data = ""
try:
img_data = GetUserDataAsString(task, image_info_address, image_info_size)
except Exception, e:
debuglog("Failed to read user data for task 0x{:x} addr 0x{:x}, exception {:s}".format(task, image_info_address, str(e)))
pass
if is_task_64:
image_info_addr = _ExtractDataFromString(img_data, 0, "uint64_t")
image_info_path = _ExtractDataFromString(img_data, 8, "uint64_t")
else:
image_info_addr = _ExtractDataFromString(img_data, 0, "uint32_t")
image_info_path = _ExtractDataFromString(img_data, 4, "uint32_t")
if image_info_addr :
debuglog("Found image: image_info_addr = %s, image_info_path= %s" % (hex(image_info_addr), hex(image_info_path)))
image_info_list.append((image_info_addr, image_info_path))
i += 1
image_info_list.sort()
num_images_found = len(image_info_list)
for ii in range(num_images_found):
n_im_info_addr = dyld_load_address
if ii + 1 < num_images_found:
n_im_info_addr = image_info_list[ii+1][0]
image_info_addr = image_info_list[ii][0]
image_info_path = image_info_list[ii][1]
try:
image_print_s = GetImageInfo(task, image_info_addr, image_info_path, approx_end_address=n_im_info_addr)
if len(image_print_s) > 0:
print image_print_s
ShowTaskUserLibraries.found_images.append((image_info_addr, n_im_info_addr, image_info_path, image_print_s))
else:
debuglog("Failed to print image info for task 0x{:x} image_info 0x{:x}".format(task, image_info_addr))
except Exception,e:
if config['debug']:
raise e
if ShowTaskUserLibraries.exec_load_path != 0:
debuglog("main executable load_path is set.")
image_print_s = GetImageInfo(task, dyld_load_address, ShowTaskUserLibraries.exec_load_path)
if len(image_print_s) > 0:
print image_print_s
ShowTaskUserLibraries.found_images.append((dyld_load_address, dyld_load_address + 0xffffffff,
ShowTaskUserLibraries.exec_load_path, image_print_s))
else:
debuglog("Failed to print image for main executable for task 0x{:x} dyld_load_addr 0x{:x}".format(task, dyld_load_address))
else:
debuglog("Falling back to vm entry method for finding executable load address")
print "# NOTE: Failed to find executable using all_image_infos. Using fuzzy match to find best possible load address for executable."
ShowTaskLoadInfo([cmd_args[0]])
return
@lldb_command("showtaskuserdyldinfo")
def ShowTaskUserDyldInfo(cmd_args=None):
""" Inspect the dyld global info for the given user task & print out all fields including error messages
Syntax: (lldb)showtaskuserdyldinfo <task_t>
"""
if cmd_args == None or len(cmd_args) < 1:
print "No arguments passed"
print ShowTaskUserDyldInfo.__doc__.strip()
return
out_str = ""
task = kern.GetValueFromAddress(cmd_args[0], 'task_t')
is_task_64 = int(task.t_flags) & 0x1
dyld_all_image_infos_address = unsigned(task.all_image_info_addr)
if dyld_all_image_infos_address == 0:
print "No dyld shared library information available for task"
return False
vers_info_data = GetUserDataAsString(task, dyld_all_image_infos_address, 112)
dyld_all_image_infos_version = _ExtractDataFromString(vers_info_data, 0, "uint32_t")
if dyld_all_image_infos_version > 14:
out_str += "Unknown dyld all_image_infos version number %d" % dyld_all_image_infos_version
if is_task_64:
dyld_all_image_infos_infoArrayCount = _ExtractDataFromString(vers_info_data, 4, "uint32_t")
dyld_all_image_infos_infoArray = _ExtractDataFromString(vers_info_data, 8, "uint64_t")
dyld_all_image_infos_notification = _ExtractDataFromString(vers_info_data, 16, "uint64_t")
dyld_all_image_infos_processDetachedFromSharedRegion = _ExtractDataFromString(vers_info_data, 24, "string")
dyld_all_image_infos_libSystemInitialized = _ExtractDataFromString(vers_info_data, 25, "string")
dyld_all_image_infos_dyldImageLoadAddress = _ExtractDataFromString(vers_info_data, 32, "uint64_t")
dyld_all_image_infos_jitInfo = _ExtractDataFromString(vers_info_data, 40, "uint64_t")
dyld_all_image_infos_dyldVersion = _ExtractDataFromString(vers_info_data, 48, "uint64_t")
dyld_all_image_infos_errorMessage = _ExtractDataFromString(vers_info_data, 56, "uint64_t")
dyld_all_image_infos_terminationFlags = _ExtractDataFromString(vers_info_data, 64, "uint64_t")
dyld_all_image_infos_coreSymbolicationShmPage = _ExtractDataFromString(vers_info_data, 72, "uint64_t")
dyld_all_image_infos_systemOrderFlag = _ExtractDataFromString(vers_info_data, 80, "uint64_t")
dyld_all_image_infos_uuidArrayCount = _ExtractDataFromString(vers_info_data, 88, "uint64_t")
dyld_all_image_infos_uuidArray = _ExtractDataFromString(vers_info_data, 96, "uint64_t")
dyld_all_image_infos_dyldAllImageInfosAddress = _ExtractDataFromString(vers_info_data, 104, "uint64_t")
else:
dyld_all_image_infos_infoArrayCount = _ExtractDataFromString(vers_info_data, 4, "uint32_t")
dyld_all_image_infos_infoArray = _ExtractDataFromString(vers_info_data, 8, "uint32_t")
dyld_all_image_infos_notification = _ExtractDataFromString(vers_info_data, 12, "uint32_t")
dyld_all_image_infos_processDetachedFromSharedRegion = _ExtractDataFromString(vers_info_data, 16, "string")
dyld_all_image_infos_libSystemInitialized = _ExtractDataFromString(vers_info_data, 17, "string")
dyld_all_image_infos_dyldImageLoadAddress = _ExtractDataFromString(vers_info_data, 20, "uint32_t")
dyld_all_image_infos_jitInfo = _ExtractDataFromString(vers_info_data, 24, "uint32_t")
dyld_all_image_infos_dyldVersion = _ExtractDataFromString(vers_info_data, 28, "uint32_t")
dyld_all_image_infos_errorMessage = _ExtractDataFromString(vers_info_data, 32, "uint32_t")
dyld_all_image_infos_terminationFlags = _ExtractDataFromString(vers_info_data, 36, "uint32_t")
dyld_all_image_infos_coreSymbolicationShmPage = _ExtractDataFromString(vers_info_data, 40, "uint32_t")
dyld_all_image_infos_systemOrderFlag = _ExtractDataFromString(vers_info_data, 44, "uint32_t")
dyld_all_image_infos_uuidArrayCount = _ExtractDataFromString(vers_info_data, 48, "uint32_t")
dyld_all_image_infos_uuidArray = _ExtractDataFromString(vers_info_data, 52, "uint32_t")
dyld_all_image_infos_dyldAllImageInfosAddress = _ExtractDataFromString(vers_info_data, 56, "uint32_t")
dyld_all_imfo_infos_slide = (dyld_all_image_infos_address - dyld_all_image_infos_dyldAllImageInfosAddress)
dyld_all_image_infos_dyldVersion_postslide = (dyld_all_image_infos_dyldVersion + dyld_all_imfo_infos_slide)
path_out = GetUserspaceString(task, dyld_all_image_infos_dyldVersion_postslide)
out_str += "[dyld-{:s}]\n".format(path_out)
out_str += "version \t\t\t\t: {:d}\n".format(dyld_all_image_infos_version)
out_str += "infoArrayCount \t\t\t\t: {:d}\n".format(dyld_all_image_infos_infoArrayCount)
out_str += "infoArray \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_infoArray)
out_str += "notification \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_notification)
out_str += "processDetachedFromSharedRegion \t: "
if dyld_all_image_infos_processDetachedFromSharedRegion != "":
out_str += "TRUE\n".format(dyld_all_image_infos_processDetachedFromSharedRegion)
else:
out_str += "FALSE\n"
out_str += "libSystemInitialized \t\t\t: "
if dyld_all_image_infos_libSystemInitialized != "":
out_str += "TRUE\n".format(dyld_all_image_infos_libSystemInitialized)
else:
out_str += "FALSE\n"
out_str += "dyldImageLoadAddress \t\t\t: {:#x}\n".format(dyld_all_image_infos_dyldImageLoadAddress)
out_str += "jitInfo \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_jitInfo)
out_str += "\ndyldVersion \t\t\t\t: {:#x}".format(dyld_all_image_infos_dyldVersion)
if (dyld_all_imfo_infos_slide != 0):
out_str += " (currently {:#x})\n".format(dyld_all_image_infos_dyldVersion_postslide)
else:
out_str += "\n"
out_str += "errorMessage \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorMessage)
if dyld_all_image_infos_errorMessage != 0:
out_str += GetUserspaceString(task, dyld_all_image_infos_errorMessage)
out_str += "terminationFlags \t\t\t: {:#x}\n".format(dyld_all_image_infos_terminationFlags)
out_str += "coreSymbolicationShmPage \t\t: {:#x}\n".format(dyld_all_image_infos_coreSymbolicationShmPage)
out_str += "systemOrderFlag \t\t\t: {:#x}\n".format(dyld_all_image_infos_systemOrderFlag)
out_str += "uuidArrayCount \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_uuidArrayCount)
out_str += "uuidArray \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_uuidArray)
out_str += "dyldAllImageInfosAddress \t\t: {:#x}".format(dyld_all_image_infos_dyldAllImageInfosAddress)
if (dyld_all_imfo_infos_slide != 0):
out_str += " (currently {:#x})\n".format(dyld_all_image_infos_address)
else:
out_str += "\n"
if is_task_64:
dyld_all_image_infos_address = dyld_all_image_infos_address + 112
dyld_all_image_infos_v10 = GetUserDataAsString(task, dyld_all_image_infos_address, 64)
dyld_all_image_infos_initialImageCount = _ExtractDataFromString(dyld_all_image_infos_v10, 112-112, "uint64_t")
dyld_all_image_infos_errorKind = _ExtractDataFromString(dyld_all_image_infos_v10, 120-112, "uint64_t")
dyld_all_image_infos_errorClientOfDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 128-112, "uint64_t")
dyld_all_image_infos_errorTargetDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 136-112, "uint64_t")
dyld_all_image_infos_errorSymbol = _ExtractDataFromString(dyld_all_image_infos_v10, 144-112, "uint64_t")
dyld_all_image_infos_sharedCacheSlide = _ExtractDataFromString(dyld_all_image_infos_v10, 152-112, "uint64_t")
dyld_all_image_infos_sharedCacheUUID = _ExtractDataFromString(dyld_all_image_infos_v10, 160-112, "string")
else:
dyld_all_image_infos_address = dyld_all_image_infos_address + 60
dyld_all_image_infos_v10 = GetUserDataAsString(task, dyld_all_image_infos_address, 40)
dyld_all_image_infos_initialImageCount = _ExtractDataFromString(dyld_all_image_infos_v10, 60-60, "uint32_t")
dyld_all_image_infos_errorKind = _ExtractDataFromString(dyld_all_image_infos_v10, 64-60, "uint32_t")
dyld_all_image_infos_errorClientOfDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 68-60, "uint32_t")
dyld_all_image_infos_errorTargetDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 72-60, "uint32_t")
dyld_all_image_infos_errorSymbol = _ExtractDataFromString(dyld_all_image_infos_v10, 76-60, "uint32_t")
dyld_all_image_infos_sharedCacheSlide = _ExtractDataFromString(dyld_all_image_infos_v10, 80-60, "uint32_t")
dyld_all_image_infos_sharedCacheUUID = _ExtractDataFromString(dyld_all_image_infos_v10, 84-60, "string")
if dyld_all_image_infos_version >= 10:
out_str += "\ninitialImageCount \t\t\t: {:#x}\n".format(dyld_all_image_infos_initialImageCount)
if dyld_all_image_infos_version >= 11:
out_str += "errorKind \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorKind)
out_str += "errorClientOfDylibPath \t\t\t: {:#x}\n".format(dyld_all_image_infos_errorClientOfDylibPath)
if dyld_all_image_infos_errorClientOfDylibPath != 0:
out_str += "\t\t\t\t"
out_str += GetUserspaceString(task, dyld_all_image_infos_errorClientOfDylibPath)
out_str += "\n"
out_str += "errorTargetDylibPath \t\t\t: {:#x}\n".format(dyld_all_image_infos_errorTargetDylibPath)
if dyld_all_image_infos_errorTargetDylibPath != 0:
out_str += "\t\t\t\t"
out_str += GetUserspaceString(task, dyld_all_image_infos_errorTargetDylibPath)
out_str += "\n"
out_str += "errorSymbol \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorSymbol)
if dyld_all_image_infos_errorSymbol != 0:
out_str += "\t\t\t\t"
out_str += GetUserspaceString(task, dyld_all_image_infos_errorSymbol)
out_str += "\n"
if dyld_all_image_infos_version >= 12:
out_str += "sharedCacheSlide \t\t\t: {:#x}\n".format(dyld_all_image_infos_sharedCacheSlide)
if dyld_all_image_infos_version >= 13 and dyld_all_image_infos_sharedCacheUUID != "":
out_str += "sharedCacheUUID \t\t\t: {:s}\n".format(dyld_all_image_infos_sharedCacheUUID)
else:
out_str += "No dyld information available for task\n"
print out_str
@lldb_type_summary(['OSMallocTag'])
@header("{0: <20s} {1: >5s} {2: ^16s} {3: <5s} {4: <40s}".format("TAG", "COUNT", "STATE", "ATTR", "NAME"))
def GetOSMallocTagSummary(malloc_tag):
""" Summarize the given OSMalloc tag.
params:
malloc_tag : value - value representing a _OSMallocTag_ * in kernel
returns:
out_str - string summary of the OSMalloc tag.
"""
if not malloc_tag:
return "Invalid malloc tag value: 0x0"
out_str = "{: <#20x} {: >5d} {: ^#16x} {: <5d} {: <40s}\n".format(malloc_tag,
malloc_tag.OSMT_refcnt, malloc_tag.OSMT_state, malloc_tag.OSMT_attr, malloc_tag.OSMT_name)
return out_str
@lldb_command('showosmalloc')
def ShowOSMalloc(cmd_args=None):
""" Print the outstanding allocation count of OSMalloc tags
Usage: showosmalloc
"""
summary_str = ""
tag_headp = Cast(addressof(kern.globals.OSMalloc_tag_list), 'struct _OSMallocTag_ *')
tagp = Cast(tag_headp.OSMT_link.next, 'struct _OSMallocTag_ *')
summary_str += GetOSMallocTagSummary.header + "\n"
while tagp != tag_headp:
summary_str += GetOSMallocTagSummary(tagp)
tagp = Cast(tagp.OSMT_link.next, 'struct _OSMallocTag_ *')
print summary_str
@lldb_command('savekcdata', 'T:O:')
def SaveKCDataToFile(cmd_args=None, cmd_options={}):
""" Save the data referred by the kcdata_descriptor structure.
options:
-T: <task_t> pointer to task if memory referenced is in userstask.
-O: <output file path> path to file to save data. default: /tmp/kcdata.<timestamp>.bin
Usage: (lldb) savekcdata <kcdata_descriptor_t> -T <task_t> -O /path/to/outputfile.bin
"""
if not cmd_args:
raise ArgumentError('Please provide the kcdata descriptor.')
kcdata = kern.GetValueFromAddress(cmd_args[0], 'kcdata_descriptor_t')
outputfile = '/tmp/kcdata.{:s}.bin'.format(str(time.time()))
task = None
if '-O' in cmd_options:
outputfile = cmd_options['-O']
if '-T' in cmd_options:
task = kern.GetValueFromAddress(cmd_options['-T'], 'task_t')
memory_begin_address = unsigned(kcdata.kcd_addr_begin)
memory_size = 16 + unsigned(kcdata.kcd_addr_end) - memory_begin_address
flags_copyout = unsigned(kcdata.kcd_flags)
if flags_copyout:
if not task:
raise ArgumentError('Invalid task pointer provided.')
memory_data = GetUserDataAsString(task, memory_begin_address, memory_size)
else:
data_ptr = kern.GetValueFromAddress(memory_begin_address, 'uint8_t *')
memory_data = []
for i in range(memory_size):
memory_data.append(chr(data_ptr[i]))
if i % 50000 == 0:
print "%d of %d \r" % (i, memory_size),
memory_data = ''.join(memory_data)
if len(memory_data) != memory_size:
print "Failed to read {:d} bytes from address {: <#020x}".format(memory_size, memory_begin_address)
return False
fh = open(outputfile, 'w')
fh.write(memory_data)
fh.close()
print "Saved {:d} bytes to file {:s}".format(memory_size, outputfile)
return True