6fd87d5d33
The synthetic children providers now use the new (safer) APIs to get the values of objects As a side effect, fixed an issue in ValueObject where ResolveValue() was not always updating the value before reading it llvm-svn: 136861
56 lines
2.2 KiB
Python
56 lines
2.2 KiB
Python
class StdVectorSynthProvider:
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def __init__(self, valobj, dict):
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self.valobj = valobj;
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self.update()
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def num_children(self):
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start_val = self.start.GetValueAsUnsigned(0)
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finish_val = self.finish.GetValueAsUnsigned(0)
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end_val = self.end.GetValueAsUnsigned(0)
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# Before a vector has been constructed, it will contain bad values
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# so we really need to be careful about the length we return since
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# unitialized data can cause us to return a huge number. We need
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# to also check for any of the start, finish or end of storage values
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# being zero (NULL). If any are, then this vector has not been
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# initialized yet and we should return zero
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# Make sure nothing is NULL
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if start_val == 0 or finish_val == 0 or end_val == 0:
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return 0
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# Make sure start is less than finish
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if start_val >= finish_val:
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return 0
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# Make sure finish is less than or equal to end of storage
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if finish_val > end_val:
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return 0
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# We might still get things wrong, so cap things at 256 items for now
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# TODO: read a target "settings set" variable for this to allow it to
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# be customized
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num_children = (finish_val-start_val)/self.data_size
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if num_children > 256:
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return 256
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return num_children
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def get_child_index(self,name):
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if name == "len":
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return self.num_children();
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else:
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return int(name.lstrip('[').rstrip(']'))
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def get_child_at_index(self,index):
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if index == self.num_children():
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return self.valobj.CreateValueFromExpression("len",str(self.num_children()))
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else:
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offset = index * self.data_size
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return self.start.CreateChildAtOffset('['+str(index)+']',offset,self.data_type)
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def update(self):
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impl = self.valobj.GetChildMemberWithName('_M_impl')
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self.start = impl.GetChildMemberWithName('_M_start')
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self.finish = impl.GetChildMemberWithName('_M_finish')
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self.end = impl.GetChildMemberWithName('_M_end_of_storage')
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self.data_type = self.start.GetType().GetPointeeType()
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self.data_size = self.data_type.GetByteSize()
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