| Enrico Granata | eb4a479 | 2012-02-23 23:10:27 +0000 | [diff] [blame^] | 1 | # summary provider for NSBundle |
| 2 | import lldb |
| 3 | import ctypes |
| 4 | import objc_runtime |
| 5 | import metrics |
| 6 | import NSURL |
| 7 | |
| 8 | statistics = metrics.Metrics() |
| 9 | statistics.add_metric('invalid_isa') |
| 10 | statistics.add_metric('invalid_pointer') |
| 11 | statistics.add_metric('unknown_class') |
| 12 | statistics.add_metric('code_notrun') |
| 13 | |
| 14 | # despite the similary to synthetic children providers, these classes are not |
| 15 | # trying to provide anything but a summary for an NSURL, so they need not |
| 16 | # obey the interface specification for synthetic children providers |
| 17 | class NSBundleKnown_SummaryProvider: |
| 18 | def adjust_for_architecture(self): |
| 19 | self.lp64 = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8) |
| 20 | self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle) |
| 21 | self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize() |
| 22 | |
| 23 | def __init__(self, valobj): |
| 24 | self.valobj = valobj; |
| 25 | self.update(); |
| 26 | |
| 27 | def update(self): |
| 28 | self.adjust_for_architecture(); |
| 29 | self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID) |
| 30 | if self.lp64: |
| 31 | self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong) |
| 32 | self.pointer_size = 8 |
| 33 | else: |
| 34 | self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt) |
| 35 | self.pointer_size = 4 |
| 36 | self.NSString = self.valobj.GetTarget().FindFirstType('NSString') |
| 37 | self.NSURL = self.valobj.GetTarget().FindFirstType('NSURL') |
| 38 | |
| 39 | # we need to skip the ISA, plus four other values |
| 40 | # that are luckily each a pointer in size |
| 41 | # which makes our computation trivial :-) |
| 42 | def offset(self): |
| 43 | return 5 * self.pointer_size |
| 44 | |
| 45 | def url_text(self): |
| 46 | global statistics |
| 47 | text = self.valobj.CreateChildAtOffset("text", |
| 48 | self.offset(), |
| 49 | self.NSString.GetPointerType()) |
| 50 | my_string = text.GetSummary() |
| 51 | if (my_string == None) or (my_string == ''): |
| 52 | statistics.metric_hit('unknown_class',str(self.valobj) + " triggered unkown pointer location") |
| 53 | return NSBundleUnknown_SummaryProvider(self.valobj).url_text() |
| 54 | else: |
| 55 | statistics.metric_hit('code_notrun',self.valobj) |
| 56 | return my_string |
| 57 | |
| 58 | |
| 59 | class NSBundleUnknown_SummaryProvider: |
| 60 | def adjust_for_architecture(self): |
| 61 | self.lp64 = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8) |
| 62 | self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle) |
| 63 | self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize() |
| 64 | |
| 65 | def __init__(self, valobj): |
| 66 | self.valobj = valobj; |
| 67 | self.update() |
| 68 | |
| 69 | def update(self): |
| 70 | self.adjust_for_architecture(); |
| 71 | self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID) |
| 72 | |
| 73 | def url_text(self): |
| 74 | stream = lldb.SBStream() |
| 75 | self.valobj.GetExpressionPath(stream) |
| 76 | expr = "(NSString*)[" + stream.GetData() + " bundlePath]" |
| 77 | url_text_vo = self.valobj.CreateValueFromExpression("path",expr); |
| 78 | return url_text_vo.GetSummary() |
| 79 | |
| 80 | |
| 81 | def GetSummary_Impl(valobj): |
| 82 | global statistics |
| 83 | class_data = objc_runtime.ObjCRuntime(valobj) |
| 84 | if class_data.is_valid() == False: |
| 85 | statistics.metric_hit('invalid_pointer',valobj) |
| 86 | wrapper = None |
| 87 | return |
| 88 | class_data = class_data.read_class_data() |
| 89 | if class_data.is_valid() == False: |
| 90 | statistics.metric_hit('invalid_isa',valobj) |
| 91 | wrapper = None |
| 92 | return |
| 93 | if class_data.is_kvo(): |
| 94 | class_data = class_data.get_superclass() |
| 95 | if class_data.is_valid() == False: |
| 96 | statistics.metric_hit('invalid_isa',valobj) |
| 97 | wrapper = None |
| 98 | return |
| 99 | |
| 100 | name_string = class_data.class_name() |
| 101 | if name_string == 'NSBundle': |
| 102 | wrapper = NSBundleKnown_SummaryProvider(valobj) |
| 103 | # [NSBundle mainBundle] does return an object that is |
| 104 | # not correctly filled out for our purposes, so we still |
| 105 | # end up having to run code in that case |
| 106 | #statistics.metric_hit('code_notrun',valobj) |
| 107 | else: |
| 108 | wrapper = NSBundleUnknown_SummaryProvider(valobj) |
| 109 | statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string) |
| 110 | return wrapper; |
| 111 | |
| 112 | def NSBundle_SummaryProvider (valobj,dict): |
| 113 | provider = GetSummary_Impl(valobj); |
| 114 | if provider != None: |
| 115 | try: |
| 116 | summary = provider.url_text(); |
| 117 | except: |
| 118 | summary = None |
| 119 | if summary == None or summary == '': |
| 120 | summary = 'no valid NSBundle here' |
| 121 | return summary |
| 122 | return '' |
| 123 | |
| 124 | def __lldb_init_module(debugger,dict): |
| 125 | debugger.HandleCommand("type summary add -F NSBundle.NSBundle_SummaryProvider NSBundle") |