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# synthetic children provider for NSArray
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')
# much less functional than the other two cases below
# just runs code to get to the count and then returns
# no children
class NSArrayKVC_SynthProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, dict, params):
self.valobj = valobj;
self.update()
def update(self):
self.adjust_for_architecture();
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)
# much less functional than the other two cases below
# just runs code to get to the count and then returns
# no children
class NSArrayCF_SynthProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, dict, params):
self.valobj = valobj;
self.sys_params = params
if not (self.sys_params.types_cache.ulong):
self.sys_params.types_cache.ulong = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
self.update()
def update(self):
self.adjust_for_architecture();
def num_children(self):
num_children_vo = self.valobj.CreateChildAtOffset("count",
self.sys_params.cfruntime_size,
self.sys_params.types_cache.ulong)
return num_children_vo.GetValueAsUnsigned(0)
class NSArrayI_SynthProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, dict, params):
self.valobj = valobj;
self.sys_params = params
if not(self.sys_params.types_cache.long):
self.sys_params.types_cache.long = self.valobj.GetType().GetBasicType(lldb.eBasicTypeLong)
self.update()
def update(self):
self.adjust_for_architecture();
# skip the isa pointer and get at the size
def num_children(self):
count = self.valobj.CreateChildAtOffset("count",
self.sys_params.pointer_size,
self.sys_params.types_cache.long);
return count.GetValueAsUnsigned(0)
class NSArrayM_SynthProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, dict, params):
self.valobj = valobj;
self.sys_params = params
if not(self.sys_params.types_cache.long):
self.sys_params.types_cache.long = self.valobj.GetType().GetBasicType(lldb.eBasicTypeLong)
self.update()
def update(self):
self.adjust_for_architecture();
# skip the isa pointer and get at the size
def num_children(self):
count = self.valobj.CreateChildAtOffset("count",
self.sys_params.pointer_size,
self.sys_params.types_cache.long);
return count.GetValueAsUnsigned(0)
# this is the actual synth provider, but is just a wrapper that checks
# whether valobj is an instance of __NSArrayI or __NSArrayM and sets up an
# appropriate backend layer to do the computations
class NSArray_SynthProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, dict):
self.valobj = valobj;
self.adjust_for_architecture()
self.wrapper = self.make_wrapper(valobj,dict)
self.invalid = (self.wrapper == None)
def num_children(self):
if self.wrapper == None:
return 0;
return self.wrapper.num_children()
def update(self):
if self.wrapper == None:
return
self.wrapper.update()
# this code acts as our defense against NULL and unitialized
# NSArray pointers, which makes it much longer than it would be otherwise
def make_wrapper(self,valobj,dict):
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 == '__NSArrayI':
wrapper = NSArrayI_SynthProvider(valobj, dict, class_data.sys_params)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSArrayM':
wrapper = NSArrayM_SynthProvider(valobj, dict, class_data.sys_params)
statistics.metric_hit('code_notrun',valobj)
elif name_string == '__NSCFArray':
wrapper = NSArrayCF_SynthProvider(valobj, dict, class_data.sys_params)
statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSArrayKVC_SynthProvider(valobj, dict, class_data.sys_params)
statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string)
return wrapper;
def CFArray_SummaryProvider (valobj,dict):
provider = NSArray_SynthProvider(valobj,dict);
if provider.invalid == False:
try:
summary = str(provider.num_children());
except:
summary = None
if summary == None:
summary = 'no valid array here'
return summary + " objects"
return ''
def __lldb_init_module(debugger,dict):
debugger.HandleCommand("type summary add -F CFArray.CFArray_SummaryProvider NSArray CFArrayRef CFMutableArrayRef")
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