forked from OSchip/llvm-project
212 lines
6.9 KiB
Python
212 lines
6.9 KiB
Python
# summary provider for NSSet
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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 port number of an NSMachPort, so they need not
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# obey the interface specification for synthetic children providers
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class NSCFSet_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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self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
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# one pointer is the ISA
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# then we have one other internal pointer, plus
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# 4 bytes worth of flags. hence, these values
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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 count(self):
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vcount = self.valobj.CreateChildAtOffset("count",
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self.offset(),
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self.NSUInteger)
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return vcount.GetValueAsUnsigned(0)
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class NSSetUnknown_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 count(self):
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stream = lldb.SBStream()
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self.valobj.GetExpressionPath(stream)
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expr = "(int)[" + stream.GetData() + " count]"
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num_children_vo = self.valobj.CreateValueFromExpression("count",expr);
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return num_children_vo.GetValueAsUnsigned(0)
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class NSSetI_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 count(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 MSB on immutable sets seems to be taken by some other data
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# not sure if it is a bug or some weird sort of feature, but masking it out
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# gets the count right (unless, of course, someone's dictionaries grow
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# too large - but I have not tested this)
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if self.is_64_bit:
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value = value & ~0xFF00000000000000
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else:
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value = value & ~0xFF000000
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return value
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class NSSetM_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 count(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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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 == '__NSCFSet':
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wrapper = NSCFSet_SummaryProvider(valobj)
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statistics.metric_hit('code_notrun',valobj)
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elif name_string == '__NSSetI':
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wrapper = NSSetI_SummaryProvider(valobj)
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statistics.metric_hit('code_notrun',valobj)
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elif name_string == '__NSSetM':
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wrapper = NSSetM_SummaryProvider(valobj)
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statistics.metric_hit('code_notrun',valobj)
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else:
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wrapper = NSSetUnknown_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 NSSet_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 = provider.count();
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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 set here'
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return str(summary) + ' objects'
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return ''
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def NSSet_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.count();
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except:
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summary = None
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# for some reason, one needs to clear some bits for the count returned
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# to be correct when using directly CF*SetRef as compared to NS*Set
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# this only happens on 64bit, and the bit mask was derived through
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# experimentation (if counts start looking weird, then most probably
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# the mask needs to be changed)
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if summary == None:
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summary = 'no valid set here'
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else:
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if provider.is_64_bit:
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summary = int(summary) & ~0x1fff000000000000
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return str(summary) + ' objects'
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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 NSSet.NSSet_SummaryProvider NSSet")
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debugger.HandleCommand("type summary add -F NSSet.NSSet_SummaryProvider2 CFSetRef CFMutableSetRef")
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