forked from OSchip/llvm-project
125 lines
3.9 KiB
Python
125 lines
3.9 KiB
Python
# summary provider for CFBinaryHeap
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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 length for an CFBinaryHeap, so they need not
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# obey the interface specification for synthetic children providers
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class CFBinaryHeapRef_SummaryProvider:
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def adjust_for_architecture(self):
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pass
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def __init__(self, valobj, params):
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self.valobj = valobj;
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self.sys_params = params
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if not(self.sys_params.types_cache.NSUInteger):
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if self.sys_params.is_64_bit:
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self.sys_params.types_cache.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
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else:
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self.sys_params.types_cache.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
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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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# 8 bytes on i386
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# 16 bytes on x64
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# most probably 2 pointers
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def offset(self):
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return 2 * self.sys_params.pointer_size
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def length(self):
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size = self.valobj.CreateChildAtOffset("count",
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self.offset(),
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self.sys_params.types_cache.NSUInteger)
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return size.GetValueAsUnsigned(0)
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class CFBinaryHeapUnknown_SummaryProvider:
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def adjust_for_architecture(self):
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pass
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def __init__(self, valobj, params):
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self.valobj = valobj;
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self.sys_params = params
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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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def length(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)CFBinaryHeapGetCount(" + stream.GetData() + " )");
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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 == '__NSCFType':
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# CFBinaryHeap does not expose an actual NSWrapper type, so we have to check that this is
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# an NSCFType and then check we are a pointer-to CFBinaryHeap
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valobj_type = valobj.GetType()
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if valobj_type.IsValid() and valobj_type.IsPointerType():
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pointee_type = valobj_type.GetPointeeType()
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if pointee_type.GetName() == '__CFBinaryHeap':
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wrapper = CFBinaryHeapRef_SummaryProvider(valobj, class_data.sys_params)
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statistics.metric_hit('code_notrun',valobj)
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return wrapper
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wrapper = CFBinaryHeapUnknown_SummaryProvider(valobj, class_data.sys_params)
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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 CFBinaryHeap_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.length();
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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
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# to be correct when using CF(Mutable)BagRef on x64
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# the bit mask was derived through experimentation
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# (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.sys_params.is_64_bit:
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summary = summary & ~0x1fff000000000000
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if summary == 1:
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return '@"1 item"'
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else:
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summary = '@"' + str(summary) + ' items"'
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return summary
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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 CFBinaryHeap.CFBinaryHeap_SummaryProvider CFBinaryHeapRef")
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