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# summary provider for NSDictionary
import lldb
import ctypes
import objc_runtime
import metrics
statistics = 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 count for an NSDictionary, so they need not
# obey the interface specification for synthetic children providers
class NSCFDictionary_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update();
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
if self.is_64_bit:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
# empirically determined on both 32 and 64bit desktop Mac OS X
# probably boils down to 2 pointers and 4 bytes of data, but
# the description of __CFDictionary is not readily available so most
# of this is guesswork, plain and simple
def offset(self):
if self.is_64_bit:
return 20
else:
return 12
def num_children(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
return num_children_vo.GetValueAsUnsigned(0)
class NSDictionaryI_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update();
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
if self.is_64_bit:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
# we just need to skip the ISA and the count immediately follows
def offset(self):
if self.is_64_bit:
return 8
else:
return 4
def num_children(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
value = num_children_vo.GetValueAsUnsigned(0)
if value != None:
# the MS6bits on immutable dictionaries seem to be taken by the LSB of capacity
# not sure if it is a bug or some weird sort of feature, but masking that out
# gets the count right
if self.is_64_bit:
value = value & ~0xFC00000000000000
else:
value = value & ~0xFC000000
return value
class NSDictionaryM_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update();
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
if self.is_64_bit:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
# we just need to skip the ISA and the count immediately follows
def offset(self):
if self.is_64_bit:
return 8
else:
return 4
def num_children(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
value = num_children_vo.GetValueAsUnsigned(0)
if value != None:
# the MS6bits on mutable dictionaries seem to be taken by flags for
# KVO and probably other features. however, masking it out does get
# the count right
if self.is_64_bit:
value = value & ~0xFC00000000000000
else:
value = value & ~0xFC000000
return value
class NSDictionaryUnknown_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update()
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
def num_children(self):
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
num_children_vo = self.valobj.CreateValueFromExpression("count","(int)[" + stream.GetData() + " count]");
return num_children_vo.GetValueAsUnsigned(0)
def GetSummary_Impl(valobj):
global statistics
class_data = objc_runtime.ObjCRuntime(valobj)
if class_data.is_valid() == False:
statistics.metric_hit('invalid_pointer',valobj)
wrapper = None
return
class_data = class_data.read_class_data()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
if class_data.is_kvo():
class_data = class_data.get_superclass()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
name_string = class_data.class_name()
if name_string == '__NSCFDictionary':
wrapper = NSCFDictionary_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSDictionaryI':
wrapper = NSDictionaryI_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSDictionaryM':
wrapper = NSDictionaryM_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSDictionaryUnknown_SummaryProvider(valobj)
statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string)
return wrapper;
def CFDictionary_SummaryProvider (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
try:
summary = str(provider.num_children());
except:
summary = None
if summary == None:
summary = 'no valid dictionary here'
return summary + " key/value pairs"
return ''
def CFDictionary_SummaryProvider2 (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
try:
summary = (provider.num_children());
except:
summary = None
if summary == None:
summary = 'no valid dictionary here'
# needed on OSX Mountain Lion
elif provider.is_64_bit:
summary = int(summary) & ~0x0f1f000000000000
return str(summary) + " key/value pairs"
return ''
def __lldb_init_module(debugger,dict):
debugger.HandleCommand("type summary add -F CFDictionary.CFDictionary_SummaryProvider NSDictionary")
debugger.HandleCommand("type summary add -F CFDictionary.CFDictionary_SummaryProvider2 CFDictionaryRef CFMutableDictionaryRef")
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