forked from OSchip/llvm-project
235 lines
7.2 KiB
Python
235 lines
7.2 KiB
Python
# summary provider for NSDate
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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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import struct
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import time
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import datetime
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import CFString
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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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# Python promises to start counting time at midnight on Jan 1st on the epoch year
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# hence, all we need to know is the epoch year
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python_epoch = time.gmtime(0).tm_year
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osx_epoch = datetime.date(2001,1,1).timetuple()
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def mkgmtime(t):
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return time.mktime(t)-time.timezone
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osx_epoch = mkgmtime(osx_epoch)
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def osx_to_python_time(osx):
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if python_epoch <= 2001:
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return osx + osx_epoch
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else:
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return osx - osx_epoch
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# represent a struct_time as a string in the format used by Xcode
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def xcode_format_time(X):
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return time.strftime('%Y-%m-%d %H:%M:%S %Z',X)
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# represent a count-since-epoch as a string in the format used by Xcode
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def xcode_format_count(X):
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return xcode_format_time(time.localtime(X))
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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 summary for NSDate, so they need not
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# obey the interface specification for synthetic children providers
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class NSTaggedDate_SummaryProvider:
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def adjust_for_architecture(self):
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pass
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def __init__(self, valobj, info_bits, data, 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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# NSDate is not using its info_bits for info like NSNumber is
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# so we need to regroup info_bits and data
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self.data = ((data << 8) | (info_bits << 4))
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def update(self):
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self.adjust_for_architecture();
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def value(self):
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# the value of the date-time object is wrapped into the pointer value
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# unfortunately, it is made as a time-delta after Jan 1 2001 midnight GMT
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# while all Python knows about is the "epoch", which is a platform-dependent
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# year (1970 of *nix) whose Jan 1 at midnight is taken as reference
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value_double = struct.unpack('d', struct.pack('Q', self.data))[0]
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return xcode_format_count(osx_to_python_time(value_double))
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class NSUntaggedDate_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.double):
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self.sys_params.types_cache.double = self.valobj.GetType().GetBasicType(lldb.eBasicTypeDouble)
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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 offset(self):
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return self.sys_params.pointer_size
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def value(self):
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value = self.valobj.CreateChildAtOffset("value",
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self.offset(),
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self.sys_params.types_cache.double)
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value_double = struct.unpack('d', struct.pack('Q', value.GetValueAsUnsigned(0)))[0]
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return xcode_format_count(osx_to_python_time(value_double))
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class NSCalendarDate_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.double):
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self.sys_params.types_cache.double = self.valobj.GetType().GetBasicType(lldb.eBasicTypeDouble)
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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 offset(self):
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return 2*self.sys_params.pointer_size
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def value(self):
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value = self.valobj.CreateChildAtOffset("value",
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self.offset(),
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self.sys_params.types_cache.double)
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value_double = struct.unpack('d', struct.pack('Q', value.GetValueAsUnsigned(0)))[0]
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return xcode_format_count(osx_to_python_time(value_double))
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class NSTimeZoneClass_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.voidptr):
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self.sys_params.types_cache.voidptr = self.valobj.GetType().GetBasicType(lldb.eBasicTypeVoid).GetPointerType()
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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 offset(self):
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return self.sys_params.pointer_size
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def timezone(self):
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tz_string = self.valobj.CreateChildAtOffset("tz_name",
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self.offset(),
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self.sys_params.types_cache.voidptr)
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return CFString.CFString_SummaryProvider(tz_string,None)
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class NSUnknownDate_SummaryProvider:
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def adjust_for_architecture(self):
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pass
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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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def value(self):
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stream = lldb.SBStream()
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self.valobj.GetExpressionPath(stream)
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expr = "(NSString*)[" + stream.GetData() + " description]"
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num_children_vo = self.valobj.CreateValueFromExpression("str",expr);
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return num_children_vo.GetSummary()
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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 == 'NSDate' or name_string == '__NSDate' or name_string == '__NSTaggedDate':
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if class_data.is_tagged():
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wrapper = NSTaggedDate_SummaryProvider(valobj,class_data.info_bits(),class_data.value(), class_data.sys_params)
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statistics.metric_hit('code_notrun',valobj)
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else:
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wrapper = NSUntaggedDate_SummaryProvider(valobj, class_data.sys_params)
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statistics.metric_hit('code_notrun',valobj)
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elif name_string == 'NSCalendarDate':
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wrapper = NSCalendarDate_SummaryProvider(valobj, class_data.sys_params)
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statistics.metric_hit('code_notrun',valobj)
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elif name_string == '__NSTimeZone':
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wrapper = NSTimeZoneClass_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 = NSUnknownDate_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 NSDate_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.value();
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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 date here'
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return str(summary)
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return ''
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def NSTimeZone_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.timezone();
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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 timezone here'
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return str(summary)
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return ''
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def CFAbsoluteTime_SummaryProvider (valobj,dict):
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try:
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value_double = struct.unpack('d', struct.pack('Q', valobj.GetValueAsUnsigned(0)))[0]
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return xcode_format_count(osx_to_python_time(value_double))
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except:
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return 'unable to provide a summary'
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def __lldb_init_module(debugger,dict):
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debugger.HandleCommand("type summary add -F NSDate.NSDate_SummaryProvider NSDate")
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debugger.HandleCommand("type summary add -F NSDate.CFAbsoluteTime_SummaryProvider CFAbsoluteTime")
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debugger.HandleCommand("type summary add -F NSDate.NSTimeZone_SummaryProvider NSTimeZone CFTimeZoneRef")
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