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# summary provider for NSSet
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 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):
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)
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
# one pointer is the ISA
# then we have one other internal pointer, plus
# 4 bytes worth of flags. hence, these values
def offset(self):
if self.is_64_bit:
return 20
else:
return 12
def count(self):
vcount = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
return vcount.GetValueAsUnsigned(0)
class NSSetUnknown_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 count(self):
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
expr = "(int)[" + stream.GetData() + " count]"
num_children_vo = self.valobj.CreateValueFromExpression("count",expr);
return num_children_vo.GetValueAsUnsigned(0)
class NSSetI_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 count(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
value = num_children_vo.GetValueAsUnsigned(0)
if value != 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.is_64_bit:
value = value & ~0xFF00000000000000
else:
value = value & ~0xFF000000
return value
class NSSetM_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 count(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
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 == '__NSCFSet':
wrapper = NSCFSet_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSSetI':
wrapper = NSSetI_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSSetM':
wrapper = NSSetM_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSSetUnknown_SummaryProvider(valobj)
statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string)
return wrapper;
def NSSet_SummaryProvider (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
#try:
summary = provider.count();
#except:
# summary = None
if summary == None:
summary = 'no valid set here'
return str(summary) + ' objects'
return ''
def NSSet_SummaryProvider2 (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
try:
summary = provider.count();
except:
summary = None
# 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 == None:
summary = 'no valid set here'
else:
if provider.is_64_bit:
summary = int(summary) & ~0x1fff000000000000
return str(summary) + ' objects'
return ''
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")
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