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