forked from OSchip/llvm-project
134 lines
4.0 KiB
Python
134 lines
4.0 KiB
Python
# summary provider for NSData
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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 NSData, so they need not
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# obey the interface specification for synthetic children providers
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class NSConcreteData_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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# one pointer is the ISA
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# then there are 32 bit worth of flags and other data
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# however, on 64bit systems these are padded to be a full
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# machine word long, which means we actually have two pointers
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# worth of data to skip
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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 NSDataUnknown_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)[" + stream.GetData() + " length]");
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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 == 'NSConcreteData' or \
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name_string == 'NSConcreteMutableData' or \
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name_string == '__NSCFData':
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wrapper = NSConcreteData_SummaryProvider(valobj, class_data.sys_params)
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statistics.metric_hit('code_notrun',valobj)
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else:
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wrapper = NSDataUnknown_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 NSData_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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if summary == None:
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summary = 'no valid data here'
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else:
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if summary == 1:
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summary = '1 byte'
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else:
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summary = str(summary) + ' bytes'
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return summary
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return ''
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def NSData_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.length();
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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 data here'
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else:
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if summary == 1:
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summary = '@"1 byte"'
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else:
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summary = '@"' + str(summary) + ' bytes"'
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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 NSData.NSData_SummaryProvider NSData")
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debugger.HandleCommand("type summary add -F NSData.NSData_SummaryProvider2 CFDataRef CFMutableDataRef")
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