security/generate_mapfile.py

   1 #!/usr/bin/env python
   2
   3 # This Source Code Form is subject to the terms of the Mozilla Public
   4 # License, v. 2.0. If a copy of the MPL was not distributed with this
   5 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   6
   7 # This script processes NSS .def files according to the rules defined in
   8 # a comment at the top of each one. The files are used to define the
   9 # exports from NSS shared libraries, with -DEFFILE on Windows, a linker
  10 # script on Linux, or with -exported_symbols_list on OS X.
  11 #
  12 # The NSS build system processes them using a series of sed replacements,
  13 # but the Mozilla build system is already running a Python script to generate
  14 # the file so it's simpler to just do the replacement in Python.
  15 #
  16 # One difference between the NSS build system and Mozilla's is that
  17 # Mozilla's supports building on Linux for Windows using MinGW. MinGW
  18 # expects all lines containing ;+ removed and all ;- tokens removed.
  19
  20 import buildconfig
  21
  22
  23 def main(output, input):
  24     is_darwin = buildconfig.substs['OS_ARCH'] == 'Darwin'
  25     is_mingw = "WINNT" == buildconfig.substs['OS_ARCH'] and \
  26         buildconfig.substs.get('GCC_USE_GNU_LD')
  27
  28     with open(input, 'r', encoding='utf-8') as f:
  29         for line in f:
  30             line = line.rstrip()
  31             # On everything except MinGW, remove all lines containing ';-'
  32             if not is_mingw and ';-' in line:
  33                 continue
  34             # On OS X, remove all lines containing ';+'
  35             if is_darwin and ';+' in line:
  36                 continue
  37             # Remove the string ' DATA '.
  38             line = line.replace(' DATA ', '')
  39             # Remove the string ';+'
  40             if not is_mingw:
  41                 line = line.replace(';+', '')
  42             # Remove the string ';;'
  43             line = line.replace(';;', '')
  44             # If a ';' is present, remove everything after it,
  45             # and on OS X, remove it as well.
  46             i = line.find(';')
  47             if i != -1:
  48                 if is_darwin or is_mingw:
  49                     line = line[:i]
  50                 else:
  51                     line = line[:i+1]
  52             # On OS X, symbols get an underscore in front.
  53             if line and is_darwin:
  54                 output.write('_')
  55             output.write(line)
  56             output.write('\n')