e8e453439f
Despite the name, most of resolv_private.h is actually in glibc; it's just that there it's tucked away in libresolv whereas we have it in libc. Change-Id: Ibcf6603f1141ffd2661cee0bffa83052d4f9e549
154 lines
3.4 KiB
Python
Executable File
154 lines
3.4 KiB
Python
Executable File
#!/usr/bin/python
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import glob
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import os
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import re
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import string
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import subprocess
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import sys
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toolchain = os.environ['ANDROID_TOOLCHAIN']
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arch = re.sub(r'.*/linux-x86/([^/]+)/.*', r'\1', toolchain)
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def GetSymbolsFromSo(so_file):
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# Example readelf output:
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# 264: 0001623c 4 FUNC GLOBAL DEFAULT 8 cabsf
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# 266: 00016244 4 FUNC GLOBAL DEFAULT 8 dremf
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# 267: 00019018 4 OBJECT GLOBAL DEFAULT 11 __fe_dfl_env
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# 268: 00000000 0 FUNC GLOBAL DEFAULT UND __aeabi_dcmplt
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r = re.compile(r' +\d+: [0-9a-f]+ +\d+ (I?FUNC|OBJECT) +\S+ +\S+ +\d+ (\S+)')
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symbols = set()
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for line in subprocess.check_output(['readelf', '--dyn-syms', '-W', so_file]).split('\n'):
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if ' HIDDEN ' in line or ' UND ' in line:
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continue
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m = r.match(line)
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if m:
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symbol = m.group(2)
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symbol = re.sub('@.*', '', symbol)
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symbols.add(symbol)
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return symbols
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def GetSymbolsFromAndroidSo(*files):
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symbols = set()
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for f in files:
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symbols = symbols | GetSymbolsFromSo('%s/system/lib64/%s' % (os.environ['ANDROID_PRODUCT_OUT'], f))
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return symbols
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def GetSymbolsFromSystemSo(*files):
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symbols = set()
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for f in files:
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f = glob.glob('/lib/x86_64-linux-gnu/%s' % f)[-1]
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symbols = symbols | GetSymbolsFromSo(f)
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return symbols
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def MangleGlibcNameToBionic(name):
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if name in glibc_to_bionic_names:
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return glibc_to_bionic_names[name]
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return name
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glibc_to_bionic_names = {
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'__res_init': 'res_init',
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'__res_mkquery': 'res_mkquery',
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'__res_query': 'res_query',
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'__res_search': 'res_search',
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}
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glibc = GetSymbolsFromSystemSo('libc.so.*', 'librt.so.*', 'libpthread.so.*', 'libresolv.so.*', 'libm.so.*')
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bionic = GetSymbolsFromAndroidSo('libc.so', 'libm.so')
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glibc = map(MangleGlibcNameToBionic, glibc)
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# bionic includes various BSD symbols to ease porting other BSD-licensed code.
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bsd_stuff = set([
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'basename_r',
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'dirname_r',
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'fgetln',
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'fpurge',
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'funopen',
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'gamma_r',
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'gammaf_r',
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'getprogname',
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'setprogname',
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'strlcat',
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'strlcpy',
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'sys_signame',
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'wcslcat',
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'wcslcpy'
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])
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# Some symbols are part of the FORTIFY implementation.
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FORTIFY_stuff = set([
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'__FD_CLR_chk',
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'__FD_ISSET_chk',
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'__FD_SET_chk',
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'__stack_chk_guard',
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'__stpncpy_chk2',
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'__strchr_chk',
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'__strlcat_chk',
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'__strlcpy_chk',
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'__strlen_chk',
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'__strncpy_chk2',
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'__strrchr_chk',
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'__umask_chk'
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])
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# Some symbols are used to implement public macros.
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macro_stuff = set([
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'__assert2',
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'__errno',
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'__fe_dfl_env',
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'__get_h_errno',
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])
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# bionic exposes various Linux features that glibc doesn't.
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linux_stuff = set([
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'getauxval',
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'gettid',
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'tgkill'
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])
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# Some standard stuff isn't yet in the versions of glibc we're using.
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std_stuff = set([
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'at_quick_exit',
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'c16rtomb',
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'c32rtomb',
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'mbrtoc16',
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'mbrtoc32',
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])
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# These have mangled names in glibc, with a macro taking the "obvious" name.
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weird_stuff = set([
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'fstat',
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'fstat64',
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'fstatat',
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'fstatat64',
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'isfinite',
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'isfinitef',
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'isfinitel',
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'isnormal',
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'isnormalf',
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'isnormall',
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'lstat',
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'lstat64',
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'mknod',
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'mknodat',
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'stat',
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'stat64',
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])
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print 'glibc:'
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for symbol in sorted(glibc):
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print symbol
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print
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print 'bionic:'
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for symbol in sorted(bionic):
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print symbol
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print
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print 'in bionic but not glibc:'
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allowed_stuff = (bsd_stuff | FORTIFY_stuff | linux_stuff | macro_stuff | std_stuff | weird_stuff)
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for symbol in sorted((bionic - allowed_stuff).difference(glibc)):
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print symbol
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sys.exit(0)
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