lldb/examples/summaries/synth.py

   1 import lldb
   2
   3
   4 class PythonObjectSyntheticChildProvider(object):
   5     def __init__(self, value, internal_dict):
   6         self.value = value
   7         self.values = self.make_children()
   8         self.built_values = {}
   9         self.bo = self.value.target.byte_order
  10         self.ps = self.value.target.addr_size
  11
  12     def make_children(self):
  13         pass
  14
  15     def num_children(self):
  16         return len(self.values)
  17
  18     def get_child_index(self, name):
  19         i = 0
  20         for N, value in self.values:
  21             if N == name:
  22                 return i
  23             i += 1
  24         return None
  25
  26     def update(self):
  27         pass
  28
  29     def has_children(self):
  30         return len(self.values) > 0
  31
  32     def gen_child(self, name, value):
  33         data = None
  34         type = None
  35         if isinstance(value, int):
  36             data = lldb.SBData.CreateDataFromUInt64Array(self.bo, self.ps, [value])
  37             type = self.value.target.GetBasicType(lldb.eBasicTypeLong)
  38         elif isinstance(value, float):
  39             data = lldb.SBData.CreateDataFromDoubleArray(self.bo, self.ps, [value])
  40             type = self.value.target.GetBasicType(lldb.eBasicTypeDouble)
  41         elif isinstance(value, str):
  42             data = lldb.SBData.CreateDataFromCString(self.bo, self.ps, value)
  43             type = self.value.target.GetBasicType(lldb.eBasicTypeChar).GetArrayType(
  44                 len(value)
  45             )
  46         if (data is not None) and (type is not None):
  47             return self.value.CreateValueFromData(name, data, type)
  48         return None
  49
  50     def get_child_at_index(self, index):
  51         if index in self.built_values:
  52             return self.built_values[index]
  53
  54         bv = None
  55
  56         name, value = self.values[index]
  57         bv = self.gen_child(name, value)
  58         self.built_values[index] = bv
  59         return bv