763b96c86d
For some data formatters, even getting the number of children can be an expensive operations (e.g., needing to walk a linked list to determine the number of elements). This is then wasted work when we know we will be printing only small number of them. This patch replaces the calls to GetNumChildren (at least those on the "frame var" path) with the calls to the capped version, passing the value of `max-children-count` setting (plus one)
40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
import lldb
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class fooSynthProvider:
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# For testing purposes, we'll keep track of the maximum value of
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# max_num_children we've been called with.
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MAX_NUM_CHILDREN_MAX = 0
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@classmethod
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def reset_max_num_children_max(cls):
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old_value = fooSynthProvider.MAX_NUM_CHILDREN_MAX
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fooSynthProvider.MAX_NUM_CHILDREN_MAX = 0
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return old_value
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def __init__(self, valobj, dict):
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self.valobj = valobj
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self.int_type = valobj.GetType().GetBasicType(lldb.eBasicTypeInt)
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def num_children(self, max_num_children):
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fooSynthProvider.MAX_NUM_CHILDREN_MAX = max(
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fooSynthProvider.MAX_NUM_CHILDREN_MAX, max_num_children
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)
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return 3
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def get_child_at_index(self, index):
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if index == 0:
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child = self.valobj.GetChildMemberWithName("a")
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if index == 1:
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child = self.valobj.CreateChildAtOffset("fake_a", 1, self.int_type)
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if index == 2:
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child = self.valobj.GetChildMemberWithName("r")
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return child
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def get_child_index(self, name):
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if name == "a":
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return 0
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if name == "fake_a":
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return 1
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return 2
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