tool/mbed/mbed-sdk/workspace_tools/dev/syms.py

   1 """
   2 mbed SDK
   3 Copyright (c) 2011-2013 ARM Limited
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9     http://www.apache.org/licenses/LICENSE-2.0
  10
  11 Unless required by applicable law or agreed to in writing, software
  12 distributed under the License is distributed on an "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 See the License for the specific language governing permissions and
  15 limitations under the License.
  16
  17
  18 Utility to find which libraries could define a given symbol
  19 """
  20 from argparse import ArgumentParser
  21 from os.path import join, splitext
  22 from os import walk
  23 from subprocess import Popen, PIPE
  24
  25
  26 OBJ_EXT = ['.o', '.a', '.ar']
  27
  28
  29 def find_sym_in_lib(sym, obj_path):
  30     contain_symbol = False
  31
  32     out = Popen(["nm", "-C", obj_path], stdout=PIPE, stderr=PIPE).communicate()[0]
  33     for line in out.splitlines():
  34             tokens = line.split()
  35             n = len(tokens)
  36             if n == 2:
  37                 sym_type = tokens[0]
  38                 sym_name = tokens[1]
  39             elif n == 3:
  40                 sym_type = tokens[1]
  41                 sym_name = tokens[2]
  42             else:
  43                 continue
  44
  45             if sym_type == "U":
  46                 # This object is using this symbol, not defining it
  47                 continue
  48
  49             if sym_name == sym:
  50                 contain_symbol = True
  51
  52     return contain_symbol
  53
  54
  55 def find_sym_in_path(sym, dir_path):
  56     for root, _, files in walk(dir_path):
  57         for file in files:
  58
  59             _, ext = splitext(file)
  60             if ext not in OBJ_EXT: continue
  61
  62             path = join(root, file)
  63             if find_sym_in_lib(sym, path):
  64                 print path
  65
  66
  67 if __name__ == '__main__':
  68     parser = ArgumentParser(description='Find Symbol')
  69     parser.add_argument('-s', '--sym',  required=True,
  70                         help='The symbol to be searched')
  71     parser.add_argument('-p', '--path',  required=True,
  72                         help='The path where to search')
  73     args = parser.parse_args()
  74
  75     find_sym_in_path(args.sym, args.path)