1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294
|
"""
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
"""
# summary provider for NSSet
import lldb
import ctypes
import lldb.runtime.objc.objc_runtime
import lldb.formatters.metrics
import CFBag
import lldb.formatters.Logger
try:
basestring
except NameError:
basestring = str
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 NSMachPort, so they need not
# obey the interface specification for synthetic children providers
class NSCFSet_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.NSUInteger):
if self.sys_params.is_64_bit:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedInt)
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# one pointer is the ISA
# then we have one other internal pointer, plus
# 4 bytes worth of flags. hence, these values
def offset(self):
logger = lldb.formatters.Logger.Logger()
if self.sys_params.is_64_bit:
return 20
else:
return 12
def count(self):
logger = lldb.formatters.Logger.Logger()
vcount = self.valobj.CreateChildAtOffset(
"count", self.offset(), self.sys_params.types_cache.NSUInteger)
return vcount.GetValueAsUnsigned(0)
class NSSetUnknown_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 count(self):
logger = lldb.formatters.Logger.Logger()
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
expr = "(int)[" + stream.GetData() + " count]"
num_children_vo = self.valobj.CreateValueFromExpression("count", expr)
if num_children_vo.IsValid():
return num_children_vo.GetValueAsUnsigned(0)
return '<variable is not NSSet>'
class NSSetI_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.NSUInteger):
if self.sys_params.is_64_bit:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedInt)
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# we just need to skip the ISA and the count immediately follows
def offset(self):
logger = lldb.formatters.Logger.Logger()
return self.sys_params.pointer_size
def count(self):
logger = lldb.formatters.Logger.Logger()
num_children_vo = self.valobj.CreateChildAtOffset(
"count", self.offset(), self.sys_params.types_cache.NSUInteger)
value = num_children_vo.GetValueAsUnsigned(0)
if value is not None:
# the MSB on immutable sets seems to be taken by some other data
# not sure if it is a bug or some weird sort of feature, but masking it out
# gets the count right (unless, of course, someone's dictionaries grow
# too large - but I have not tested this)
if self.sys_params.is_64_bit:
value = value & ~0xFF00000000000000
else:
value = value & ~0xFF000000
return value
class NSSetM_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.NSUInteger):
if self.sys_params.is_64_bit:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedInt)
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# we just need to skip the ISA and the count immediately follows
def offset(self):
logger = lldb.formatters.Logger.Logger()
return self.sys_params.pointer_size
def count(self):
logger = lldb.formatters.Logger.Logger()
num_children_vo = self.valobj.CreateChildAtOffset(
"count", self.offset(), self.sys_params.types_cache.NSUInteger)
return num_children_vo.GetValueAsUnsigned(0)
class NSCountedSet_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.voidptr):
self.sys_params.types_cache.voidptr = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeVoid).GetPointerType()
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# an NSCountedSet is implemented using a CFBag whose pointer just follows
# the ISA
def offset(self):
logger = lldb.formatters.Logger.Logger()
return self.sys_params.pointer_size
def count(self):
logger = lldb.formatters.Logger.Logger()
cfbag_vo = self.valobj.CreateChildAtOffset(
"bag_impl", self.offset(), self.sys_params.types_cache.voidptr)
return CFBag.CFBagRef_SummaryProvider(
cfbag_vo, self.sys_params).length()
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 == '__NSCFSet':
wrapper = NSCFSet_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
elif name_string == '__NSSetI':
wrapper = NSSetI_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
elif name_string == '__NSSetM':
wrapper = NSSetM_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
elif name_string == 'NSCountedSet':
wrapper = NSCountedSet_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
else:
wrapper = NSSetUnknown_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit(
'unknown_class',
valobj.GetName() +
" seen as " +
name_string)
return wrapper
def NSSet_SummaryProvider(valobj, dict):
logger = lldb.formatters.Logger.Logger()
provider = GetSummary_Impl(valobj)
if provider is not None:
try:
summary = provider.count()
except:
summary = None
if summary is None:
summary = '<variable is not NSSet>'
if isinstance(summary, basestring):
return summary
else:
summary = str(summary) + \
(' objects' if summary != 1 else ' object')
return summary
return 'Summary Unavailable'
def NSSet_SummaryProvider2(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.count()
except:
summary = None
logger >> "got summary " + str(summary)
# for some reason, one needs to clear some bits for the count returned
# to be correct when using directly CF*SetRef as compared to NS*Set
# this only happens on 64bit, and the bit mask was derived through
# experimentation (if counts start looking weird, then most probably
# the mask needs to be changed)
if summary is None:
summary = '<variable is not CFSet>'
if isinstance(summary, basestring):
return summary
else:
if provider.sys_params.is_64_bit:
summary = summary & ~0x1fff000000000000
summary = '@"' + str(summary) + \
(' values"' if summary != 1 else ' value"')
return summary
return 'Summary Unavailable'
def __lldb_init_module(debugger, dict):
debugger.HandleCommand(
"type summary add -F NSSet.NSSet_SummaryProvider NSSet")
debugger.HandleCommand(
"type summary add -F NSSet.NSSet_SummaryProvider2 CFSetRef CFMutableSetRef")
|