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1#!/usr/bin/python
2
3# This tool is used to generate the version scripts for libc and libm
4# for every architecture.
5
6import atexit
7import os.path
8import shutil
9import tempfile
10import sys
11
12
13all_arches = ["arm", "arm64", "mips", "mips64", "x86", "x86_64"]
14bionic_libc_root = os.path.join(os.environ["ANDROID_BUILD_TOP"], "bionic/libc")
15bionic_libm_root = os.path.join(os.environ["ANDROID_BUILD_TOP"], "bionic/libm")
16bionic_libdl_root = os.path.join(os.environ["ANDROID_BUILD_TOP"], "bionic/libdl")
17libc_script = os.path.join(bionic_libc_root, "libc.map.txt")
18libm_script = os.path.join(bionic_libm_root, "libm.map.txt")
19libdl_script = os.path.join(bionic_libdl_root, "libdl.map.txt")
20libstdcxx_script = os.path.join(bionic_libc_root, "libstdc++.map.txt")
21
22script_name = os.path.basename(sys.argv[0])
23
24# TODO (dimity): generate architecture-specific version scripts as part of build
25
26# temp directory where we store all intermediate files
27bionic_temp = tempfile.mkdtemp(prefix="bionic_genversionscripts")
28# Make sure the directory is deleted when the script exits.
29atexit.register(shutil.rmtree, bionic_temp)
30
31bionic_libc_root = os.path.join(os.environ["ANDROID_BUILD_TOP"], "bionic/libc")
32
33warning = "Generated by %s. Do not edit." % script_name
34
35
36def has_arch_tags(tags):
37  for arch in all_arches:
38    if arch in tags:
39      return True
40  return False
41
42
43class VersionScriptGenerator(object):
44
45  def run(self):
46    for script in [libc_script, libstdcxx_script, libm_script, libdl_script]:
47      basename = os.path.basename(script)
48      dirname = os.path.dirname(script)
49      for arch in all_arches:
50        name = basename.split(".")[0] + "." + arch + ".map"
51        tmp_path = os.path.join(bionic_temp, name)
52        dest_path = os.path.join(dirname, name)
53        with open(tmp_path, "w") as fout:
54          with open(script, "r") as fin:
55            fout.write("# %s\n" % warning)
56            for line in fin:
57              index = line.find("#")
58              if index != -1:
59                tags = line[index+1:].split()
60                if arch not in tags and has_arch_tags(tags):
61                  continue
62              fout.write(line)
63        shutil.copyfile(tmp_path, dest_path)
64
65
66generator = VersionScriptGenerator()
67generator.run()
68