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annotate paraspace/injection.py @ 88:bbe8d5cbe368

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Clone objects with meta info
author Thinker K.F. Li <thinker@codemud.net>
date Sun, 24 Jul 2011 19:15:04 +0800
parents cd1ee85853f4
children 88645ab29aeb
rev   line source
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1
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2 def _relocatable_children(obj):
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3 from paraspace.dexfile import relocatable
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5 attr_value_pairs = [(attr, getattr(obj, attr)) for attr in dir(obj)]
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6 rel_children = [(attr, value) for attr, value in attr_value_pairs
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7 if isinstance(value, relocatable)]
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8 return rel_children
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11 ## \brief Travel relocatable descendants.
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12 #
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13 # \param cloner is the function to return a clone.
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14 # \param adjuster is called to adjust the clone.
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15 # \param visit_log is a dictionary to keep clones.
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16 #
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17 def _travel_desc_relocatable(obj, worker, visit_log):
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18 if id(obj) in visit_log:
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19 return visit_log[id(obj)]
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20
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21 result = worker(obj)
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22 visit_log[id(obj)] = result
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23
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24 rel_children = _relocatable_children(obj)
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25 for attr, value in rel_children:
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26 _travel_conn_objs(value, worker, visit_log)
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27 pass
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28 pass
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30
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31 ## \brief Return name string of a linked class definition item.
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32 def classdef_name(classdef):
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33 return classdef.classIdx.descriptorIdx.stringDataOff.data
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34
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35
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36 ## \brief Return a map that map type of a object to the list of a DEXFile.
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37 def dex_type_2_array_attr_map():
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38 global dex_type_2_array_attr_map
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39 from paraspace.dexfile import DEXFile, array
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40
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41 attr_values = [(attr, getattr(DEXFile, attr))
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42 for attr in dir(DEXFile)]
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43 type_2_attr = dict([(value.child_type, attr)
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44 for attr, value in attr_values
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45 if isinstance(value, array)])
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46
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47 dex_type_2_array_attr_map = lambda: type_2_attr
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48
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49 return type_2_attr
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50
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51
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52 ## \brief Append a object to appropriate list of a DEXFile object.
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53 #
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54 # Skip the object if found no appropriate list.
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55 #
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56 def dex_append_obj_list(dex, obj):
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57 from paraspace.dex_deptracker import _dex_tree_get_child
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58 from paraspace.dex_deptracker import _dex_tree_set_child
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59
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60 type_2_attr = dex_type_2_array_attr_map()
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61 try:
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62 attr = type_2_attr[obj.__class__]
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63 except KeyError:
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64 return
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65
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66 array = getattr(dex, attr)
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67 array.items.append(obj)
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68
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69 count_name = array.count_name
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70 count = _dex_tree_get_child(dex, count_name)
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71 _dex_tree_set_child(dex, count_name, count + 1)
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72 pass
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73
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74
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75 ## \brief Clone a class definition item
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76 #
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77 # \param dex is the DEXFile that clazz is cloning for.
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78 # \param clazz is the class definition item that is cloning.
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79 #
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80 def _clone_classdef(dex, clazz):
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81 from copy import copy
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82 from paraspace.dexfile import _DEX_StringDataItem, _DEX_StringId
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83 from paraspace.dexfile import _DEX_TypeId
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84
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85 visit_log = {}
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87 def cloner(obj):
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88 clone = copy(obj)
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89 return clone
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90
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91 def relink_dependencies(clone):
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92 rel_children = _relocatable_children(clone)
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93 for attr, value in rel_children:
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94 clone_value = visit_log[id(value)]
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95 setattr(clone, attr, clone_value)
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96 pass
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97 pass
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98
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99 def merge_unique_strdata():
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100 strdatas = [(obj_id, obj)
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101 for obj_id, obj in visit_log.items()
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102 if isinstance(obj, _DEX_StringDataItem)]
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103 dex_str_2_strdata = dict([(strdata.data, strdata)
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104 for strdata in dex.stringDataItems.items])
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105 for obj_id, strdata in strdatas:
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106 if strdata.data in dex_str_2_strdata:
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107 visit_log[obj_id] = dex_str_2_strdata[strdata]
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108 else:
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109 dex_append_obj_list(dex, strdata)
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110 pass
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111 pass
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112 pass
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113
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114 def merge_unique_strid():
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115 strids = [(obj_id, obj)
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116 for obj_id, obj in visit_log.items()
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117 if isinstance(obj, _DEX_StringId)]
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118
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119 for obj_id, strid in strids:
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120 relink_dependencies(strid)
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121 pass
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122
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123 strdata_2_strid = dict([(strid.stringDataOff, strid)
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124 for strid in dex.stringIds.items])
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125 for obj_id, strid in strids:
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126 if strid.stringDataOff in strdata_2_strid:
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127 visit_log[obj_id] = strdata_2_strid[strid.stringDataOff]
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128 else:
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129 dex_append_obj_list(dex, strid)
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130 pass
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131 pass
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132 pass
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133
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134 def merge_unique_typeid():
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135 typeids = [(obj_id, obj)
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136 for obj_id, obj in visit_log.items()
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137 if isinstance(obj, _DEX_TypeId)]
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138
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139 for obj_id, typeid in typeids:
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140 relink_dependencies(typeid)
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141 pass
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142
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143 strid_2_typeid = dict([(typeid.descriptorIdx, typeid)
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144 for typeid in dex.typeIds.items])
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145 for obj_id, typeid in typeids:
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146 if typeid.descriptorIdx in strid_2_typeid:
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147 visit_log[obj_id] = strid_2_typeid[typeid.descriptorIdx]
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148 else:
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149 dex_append_obj_list(dex, typeid)
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parents: 87
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150 pass
bbe8d5cbe368 Clone objects with meta info
Thinker K.F. Li <thinker@codemud.net>
parents: 87
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151 pass
bbe8d5cbe368 Clone objects with meta info
Thinker K.F. Li <thinker@codemud.net>
parents: 87
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152 pass
bbe8d5cbe368 Clone objects with meta info
Thinker K.F. Li <thinker@codemud.net>
parents: 87
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153
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154 def has_classdef(clazz):
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155 class_typeIds = set([classdef.classIdx
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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156 for classdef in dex.classDefs.items])
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parents: 87
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157 return dex.classIdx in class_typeIds
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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158
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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159 _travel_desc_relocatable(obj, cloner, visit_log)
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parents: 87
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160
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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161 merge_unique_strdata()
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parents: 87
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162 merge_unique_strid()
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parents: 87
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163 merge_unique_typeid()
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parents: 87
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164
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parents: 87
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165 for obj in visit_log.values():
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parents: 87
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166 if isinstance(obj, (_DEX_StringDataItem,
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parents: 87
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167 _DEX_StringId,
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parents: 87
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168 _DEX_TypeId)):
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169 continue
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parents: 87
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170 relink_dependencies(obj)
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parents: 87
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171 dex_append_obj_list(dex, obj)
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parents: 87
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172 pass
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parents: 87
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173
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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174 if has_classef(clazz):
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parents: 87
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175 raise RuntimeError, \
bbe8d5cbe368 Clone objects with meta info
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parents: 87
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176 'clone a class \'%s\'that is already in the DEXFile' % \
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Thinker K.F. Li <thinker@codemud.net>
parents: 87
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177 classdef_name(clazz)
87
cd1ee85853f4 Add injection.py
Thinker K.F. Li <thinker@codemud.net>
parents:
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178 pass
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Thinker K.F. Li <thinker@codemud.net>
parents:
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179
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Thinker K.F. Li <thinker@codemud.net>
parents:
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180
cd1ee85853f4 Add injection.py
Thinker K.F. Li <thinker@codemud.net>
parents:
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181 def dexfile_insert_class(dex, class_def):
88
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parents: 87
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182 _clone_classdef(dex, class_def)
87
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Thinker K.F. Li <thinker@codemud.net>
parents:
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183 pass