Newer
Older
Enrico Granata
committed
# summary provider for CFBinaryHeap
import lldb
import ctypes
import objc_runtime
import metrics
statistics = metrics.Metrics()
statistics.add_metric('invalid_isa')
statistics.add_metric('invalid_pointer')
statistics.add_metric('unknown_class')
statistics.add_metric('code_notrun')
# despite the similary to synthetic children providers, these classes are not
# trying to provide anything but the length for an CFBinaryHeap, so they need not
# obey the interface specification for synthetic children providers
class CFBinaryHeapRef_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
Enrico Granata
committed
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update();
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
Enrico Granata
committed
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
# 8 bytes on i386
# 16 bytes on x64
# most probably 2 pointers
def offset(self):
Enrico Granata
committed
return 16
else:
return 8
def length(self):
size = self.valobj.CreateChildAtOffset("count",
self.offset(),
self.NSUInteger)
return size.GetValueAsUnsigned(0)
class CFBinaryHeapUnknown_SummaryProvider:
def adjust_for_architecture(self):
self.is_64_bit = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
Enrico Granata
committed
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update()
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
def length(self):
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
num_children_vo = self.valobj.CreateValueFromExpression("count","(int)CFBinaryHeapGetCount(" + stream.GetData() + " )");
return num_children_vo.GetValueAsUnsigned(0)
def GetSummary_Impl(valobj):
global statistics
class_data = objc_runtime.ObjCRuntime(valobj)
if class_data.is_valid() == False:
statistics.metric_hit('invalid_pointer',valobj)
wrapper = None
return
class_data = class_data.read_class_data()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
if class_data.is_kvo():
class_data = class_data.get_superclass()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
name_string = class_data.class_name()
if name_string == '__NSCFType':
# CFBinaryHeap does not expose an actual NSWrapper type, so we have to check that this is
# an NSCFType and then check we are a pointer-to CFBinaryHeap
valobj_type = valobj.GetType()
if valobj_type.IsValid() and valobj_type.IsPointerType():
pointee_type = valobj_type.GetPointeeType()
if pointee_type.GetName() == '__CFBinaryHeap':
wrapper = CFBinaryHeapRef_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
return wrapper
wrapper = CFBinaryHeapUnknown_SummaryProvider(valobj)
statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string)
return wrapper;
def CFBinaryHeap_SummaryProvider (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
try:
summary = provider.length();
except:
summary = None
# for some reason, one needs to clear some bits for the count
# to be correct when using CF(Mutable)BagRef on x64
# the bit mask was derived through experimentation
# (if counts start looking weird, then most probably
# the mask needs to be changed)
if summary == None:
summary = 'no valid set here'
else:
Enrico Granata
committed
summary = summary & ~0x1fff000000000000
if summary == 1:
return '1 item'
return str(summary) + " items"
return ''
def __lldb_init_module(debugger,dict):
debugger.HandleCommand("type summary add -F CFBinaryHeap.CFBinaryHeap_SummaryProvider CFBinaryHeapRef")