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 buildconfig.substs.get(
  26         "GCC_USE_GNU_LD"
  27     )
  28
  29     with open(input, "r", encoding="utf-8") as f:
  30         for line in f:
  31             line = line.rstrip()
  32             # On everything except MinGW, remove all lines containing ';-'
  33             if not is_mingw and ";-" in line:
  34                 continue
  35             # On OS X, remove all lines containing ';+'
  36             if is_darwin and ";+" in line:
  37                 continue
  38             # Remove the string ' DATA '.
  39             line = line.replace(" DATA ", "")
  40             # Remove the string ';+'
  41             if not is_mingw:
  42                 line = line.replace(";+", "")
  43             # Remove the string ';;'
  44             line = line.replace(";;", "")
  45             # If a ';' is present, remove everything after it,
  46             # and on OS X, remove it as well.
  47             i = line.find(";")
  48             if i != -1:
  49                 if is_darwin or is_mingw:
  50                     line = line[:i]
  51                 else:
  52                     line = line[: i + 1]
  53             # On OS X, symbols get an underscore in front.
  54             if line and is_darwin:
  55                 output.write("_")
  56             output.write(line)
  57             output.write("\n")