You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
273 lines
11 KiB
273 lines
11 KiB
"""
|
|
LLDB AppKit formatters
|
|
|
|
Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
See https://llvm.org/LICENSE.txt for license information.
|
|
SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
"""
|
|
# example summary provider for NSNumber
|
|
# the real summary is now C++ code built into LLDB
|
|
|
|
from __future__ import print_function
|
|
|
|
import lldb
|
|
import ctypes
|
|
import lldb.runtime.objc.objc_runtime
|
|
import lldb.formatters.metrics
|
|
import struct
|
|
import lldb.formatters.Logger
|
|
|
|
statistics = lldb.formatters.metrics.Metrics()
|
|
statistics.add_metric('invalid_isa')
|
|
statistics.add_metric('invalid_pointer')
|
|
statistics.add_metric('unknown_class')
|
|
statistics.add_metric('code_notrun')
|
|
|
|
# despite the similary to synthetic children providers, these classes are not
|
|
# trying to provide anything but the port number of an NSNumber, so they need not
|
|
# obey the interface specification for synthetic children providers
|
|
|
|
|
|
class NSTaggedNumber_SummaryProvider:
|
|
|
|
def adjust_for_architecture(self):
|
|
pass
|
|
|
|
def __init__(self, valobj, info_bits, data, params):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.valobj = valobj
|
|
self.sys_params = params
|
|
self.info_bits = info_bits
|
|
self.data = data
|
|
self.update()
|
|
|
|
def update(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.adjust_for_architecture()
|
|
|
|
def value(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
# in spite of the plenty of types made available by the public NSNumber API
|
|
# only a bunch of these are actually used in the internal implementation
|
|
# unfortunately, the original type information appears to be lost
|
|
# so we try to at least recover the proper magnitude of the data
|
|
if self.info_bits == 0:
|
|
return '(char)' + \
|
|
str(ord(ctypes.c_char(chr(self.data % 256)).value))
|
|
if self.info_bits == 4:
|
|
return '(short)' + \
|
|
str(ctypes.c_short(self.data % (256 * 256)).value)
|
|
if self.info_bits == 8:
|
|
return '(int)' + str(ctypes.c_int(self.data %
|
|
(256 * 256 * 256 * 256)).value)
|
|
if self.info_bits == 12:
|
|
return '(long)' + str(ctypes.c_long(self.data).value)
|
|
else:
|
|
return 'unexpected value:(info=' + str(self.info_bits) + \
|
|
", value = " + str(self.data) + ')'
|
|
|
|
|
|
class NSUntaggedNumber_SummaryProvider:
|
|
|
|
def adjust_for_architecture(self):
|
|
pass
|
|
|
|
def __init__(self, valobj, params):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.valobj = valobj
|
|
self.sys_params = params
|
|
if not(self.sys_params.types_cache.char):
|
|
self.sys_params.types_cache.char = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeChar)
|
|
if not(self.sys_params.types_cache.short):
|
|
self.sys_params.types_cache.short = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeShort)
|
|
if not(self.sys_params.types_cache.ushort):
|
|
self.sys_params.types_cache.ushort = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeUnsignedShort)
|
|
if not(self.sys_params.types_cache.int):
|
|
self.sys_params.types_cache.int = self.valobj.GetType().GetBasicType(lldb.eBasicTypeInt)
|
|
if not(self.sys_params.types_cache.long):
|
|
self.sys_params.types_cache.long = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeLong)
|
|
if not(self.sys_params.types_cache.ulong):
|
|
self.sys_params.types_cache.ulong = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeUnsignedLong)
|
|
if not(self.sys_params.types_cache.longlong):
|
|
self.sys_params.types_cache.longlong = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeLongLong)
|
|
if not(self.sys_params.types_cache.ulonglong):
|
|
self.sys_params.types_cache.ulonglong = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeUnsignedLongLong)
|
|
if not(self.sys_params.types_cache.float):
|
|
self.sys_params.types_cache.float = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeFloat)
|
|
if not(self.sys_params.types_cache.double):
|
|
self.sys_params.types_cache.double = self.valobj.GetType(
|
|
).GetBasicType(lldb.eBasicTypeDouble)
|
|
self.update()
|
|
|
|
def update(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.adjust_for_architecture()
|
|
|
|
def value(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
global statistics
|
|
# we need to skip the ISA, then the next byte tells us what to read
|
|
# we then skip one other full pointer worth of data and then fetch the contents
|
|
# if we are fetching an int64 value, one more pointer must be skipped
|
|
# to get at our data
|
|
data_type_vo = self.valobj.CreateChildAtOffset(
|
|
"dt", self.sys_params.pointer_size, self.sys_params.types_cache.char)
|
|
data_type = ((data_type_vo.GetValueAsUnsigned(0) % 256) & 0x1F)
|
|
data_offset = 2 * self.sys_params.pointer_size
|
|
if data_type == 0B00001:
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.char)
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(char)' + \
|
|
str(ord(ctypes.c_char(chr(data_vo.GetValueAsUnsigned(0))).value))
|
|
elif data_type == 0B0010:
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.short)
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(short)' + str(
|
|
ctypes.c_short(
|
|
data_vo.GetValueAsUnsigned(0) %
|
|
(256 * 256)).value)
|
|
# IF tagged pointers are possible on 32bit+v2 runtime
|
|
# (of which the only existing instance should be iOS)
|
|
# then values of this type might be tagged
|
|
elif data_type == 0B0011:
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.int)
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(int)' + str(ctypes.c_int(data_vo.GetValueAsUnsigned(0) %
|
|
(256 * 256 * 256 * 256)).value)
|
|
# apparently, on is_64_bit architectures, these are the only values that will ever
|
|
# be represented by a non tagged pointers
|
|
elif data_type == 0B10001:
|
|
data_offset = data_offset + 8 # 8 is needed even if we are on 32bit
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.longlong)
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(long)' + \
|
|
str(ctypes.c_long(data_vo.GetValueAsUnsigned(0)).value)
|
|
elif data_type == 0B0100:
|
|
if self.sys_params.is_64_bit:
|
|
data_offset = data_offset + self.sys_params.pointer_size
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.longlong)
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(long)' + \
|
|
str(ctypes.c_long(data_vo.GetValueAsUnsigned(0)).value)
|
|
elif data_type == 0B0101:
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.longlong)
|
|
data_plain = int(
|
|
str(data_vo.GetValueAsUnsigned(0) & 0x00000000FFFFFFFF))
|
|
packed = struct.pack('I', data_plain)
|
|
data_float = struct.unpack('f', packed)[0]
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(float)' + str(data_float)
|
|
elif data_type == 0B0110:
|
|
data_vo = self.valobj.CreateChildAtOffset(
|
|
"data", data_offset, self.sys_params.types_cache.longlong)
|
|
data_plain = data_vo.GetValueAsUnsigned(0)
|
|
data_double = struct.unpack('d', struct.pack('Q', data_plain))[0]
|
|
statistics.metric_hit('code_notrun', self.valobj)
|
|
return '(double)' + str(data_double)
|
|
statistics.metric_hit(
|
|
'unknown_class', str(
|
|
valobj.GetName()) + " had unknown data_type " + str(data_type))
|
|
return 'unexpected: dt = ' + str(data_type)
|
|
|
|
|
|
class NSUnknownNumber_SummaryProvider:
|
|
|
|
def adjust_for_architecture(self):
|
|
pass
|
|
|
|
def __init__(self, valobj, params):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.valobj = valobj
|
|
self.sys_params = params
|
|
self.update()
|
|
|
|
def update(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
self.adjust_for_architecture()
|
|
|
|
def value(self):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
stream = lldb.SBStream()
|
|
self.valobj.GetExpressionPath(stream)
|
|
expr = "(NSString*)[" + stream.GetData() + " stringValue]"
|
|
num_children_vo = self.valobj.CreateValueFromExpression("str", expr)
|
|
if num_children_vo.IsValid():
|
|
return num_children_vo.GetSummary()
|
|
return '<variable is not NSNumber>'
|
|
|
|
|
|
def GetSummary_Impl(valobj):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
global statistics
|
|
class_data, wrapper = lldb.runtime.objc.objc_runtime.Utilities.prepare_class_detection(
|
|
valobj, statistics)
|
|
if wrapper:
|
|
return wrapper
|
|
|
|
name_string = class_data.class_name()
|
|
logger >> "class name is: " + str(name_string)
|
|
|
|
if name_string == 'NSNumber' or name_string == '__NSCFNumber':
|
|
if class_data.is_tagged():
|
|
wrapper = NSTaggedNumber_SummaryProvider(
|
|
valobj, class_data.info_bits(), class_data.value(), class_data.sys_params)
|
|
statistics.metric_hit('code_notrun', valobj)
|
|
else:
|
|
# the wrapper might be unable to decipher what is into the NSNumber
|
|
# and then have to run code on it
|
|
wrapper = NSUntaggedNumber_SummaryProvider(
|
|
valobj, class_data.sys_params)
|
|
else:
|
|
wrapper = NSUnknownNumber_SummaryProvider(
|
|
valobj, class_data.sys_params)
|
|
statistics.metric_hit(
|
|
'unknown_class',
|
|
valobj.GetName() +
|
|
" seen as " +
|
|
name_string)
|
|
return wrapper
|
|
|
|
|
|
def NSNumber_SummaryProvider(valobj, dict):
|
|
logger = lldb.formatters.Logger.Logger()
|
|
provider = GetSummary_Impl(valobj)
|
|
if provider is not None:
|
|
if isinstance(
|
|
provider,
|
|
lldb.runtime.objc.objc_runtime.SpecialSituation_Description):
|
|
return provider.message()
|
|
try:
|
|
summary = provider.value()
|
|
except Exception as foo:
|
|
print(foo)
|
|
# except:
|
|
summary = None
|
|
logger >> "got summary " + str(summary)
|
|
if summary is None:
|
|
summary = '<variable is not NSNumber>'
|
|
return str(summary)
|
|
return 'Summary Unavailable'
|
|
|
|
|
|
def __lldb_init_module(debugger, dict):
|
|
debugger.HandleCommand(
|
|
"type summary add -F NSNumber.NSNumber_SummaryProvider NSNumber")
|
|
debugger.HandleCommand(
|
|
"type summary add -F NSNumber.NSNumber_SummaryProvider __NSCFBoolean")
|
|
debugger.HandleCommand(
|
|
"type summary add -F NSNumber.NSNumber_SummaryProvider __NSCFNumber")
|