6b586e7709
Rather than "whatever people have installed as 'python' on their machine". I've removed check-symbols.py because that's been broken for years and we never even noticed, and I'm not sure it's worth fixing. Test: treehugger, manual Change-Id: Ieb996bbdf790a18d4b1fb46a409cc240ba2a2a49
263 lines
6.8 KiB
Python
Executable file
263 lines
6.8 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Copyright (C) 2015 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the 'License');
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an 'AS IS' BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# pylint: disable=bad-indentation,bad-continuation
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import glob
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import os
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import re
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import sys
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import symbols
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only_unwanted = False
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if len(sys.argv) > 1:
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if sys.argv[1] in ('-u', '--unwanted'):
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only_unwanted = True
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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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if arch == 'aarch64':
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arch = 'arm64'
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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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def GetNdkIgnored(arch): # pylint: disable=redefined-outer-name
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ignored_symbols = set()
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files = glob.glob('%s/ndk/build/tools/unwanted-symbols/%s/*' %
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(os.getenv('ANDROID_BUILD_TOP'), arch))
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for f in files:
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ignored_symbols |= set(open(f, 'r').read().splitlines())
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return ignored_symbols
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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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'__xpg_basename': '__gnu_basename',
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}
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glibc = symbols.GetFromSystemSo([
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'libc.so.*',
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'librt.so.*',
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'libpthread.so.*',
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'libresolv.so.*',
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'libm.so.*',
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'libutil.so.*',
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])
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bionic = symbols.GetFromAndroidSo(['libc.so', 'libm.so'])
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this_dir = os.path.dirname(os.path.realpath(__file__))
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posix = symbols.GetFromTxt(os.path.join(this_dir, 'posix-2013.txt'))
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ndk_ignored = GetNdkIgnored(arch)
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glibc = set(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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'arc4random',
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'arc4random_buf',
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'arc4random_uniform',
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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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'funopen64',
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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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'__fwrite_chk',
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'__memchr_chk',
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'__memrchr_chk',
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'__pwrite64_chk',
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'__pwrite_chk',
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'__sendto_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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'__write_chk',
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])
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# Some symbols are used to implement public functions/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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'__gnu_strerror_r',
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'__fpclassifyd',
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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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'__sF',
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'__pthread_cleanup_pop',
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'__pthread_cleanup_push',
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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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'pthread_gettid_np',
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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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'optreset',
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'sigsetjmp',
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])
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# These exist in glibc, but under slightly different names (generally one extra
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# or one fewer _). TODO: check against glibc names.
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libresolv_stuff = set([
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'__res_send_setqhook',
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'__res_send_setrhook',
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'_resolv_delete_cache_for_net',
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'_resolv_flush_cache_for_net',
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'_resolv_set_nameservers_for_net',
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'dn_expand',
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'nsdispatch',
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])
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# Implementation details we know we export (and can't get away from).
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known = set([
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'_ctype_',
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'__libc_init',
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])
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# POSIX has some stuff that's unusable in the modern world (a64l) or not
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# actually implemented in glibc unless you count always failing with ENOSYS
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# as being implemented (fattach). Other stuff (fmtmsg) isn't used in any
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# codebase I have access to, internal or external.
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in_posix_and_glibc_but_dead_or_useless = set([
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'a64l', # obsolete
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'confstr', # obsolete
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'endutxent', # no utmp on Android
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'fattach', # <stropts.h> marked obsolescent
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'fdetach', # <stropts.h> marked obsolescent
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'fmtmsg', # unused
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'getdate', # unused
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'getdate_err', # unused
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'gethostid', # obsolete
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'getmsg', # <stropts.h> marked obsolescent
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'getpmsg', # <stropts.h> marked obsolescent
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'getutxent', # no utmp on Android
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'getutxid', # no utmp on Android
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'getutxline', # no utmp on Android
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'isastream', # <stropts.h> marked obsolescent
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'l64a', # obsolete
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'mq_close', # disallowed by SELinux
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'mq_getattr', # disallowed by SELinux
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'mq_notify', # disallowed by SELinux
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'mq_open', # disallowed by SELinux
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'mq_receive', # disallowed by SELinux
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'mq_send', # disallowed by SELinux
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'mq_setattr', # disallowed by SELinux
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'mq_timedreceive', # disallowed by SELinux
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'mq_timedsend', # disallowed by SELinux
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'mq_unlink', # disallowed by SELinux
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'pthread_getconcurrency', # marked obsolescent
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'pthread_setconcurrency', # marked obsolescent
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'putmsg', # <stropts.h> marked obsolescent
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'putpmsg', # <stropts.h> marked obsolescent
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'pututxline', # no utmp on Android
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'shm_open', # disallowed by SELinux
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'shm_unlink', # disallowed by SELinux
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'setutxent', # no utmp on Android
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'sockatmark', # obsolete (https://tools.ietf.org/html/rfc6093)
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'strfmon', # icu4c
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'strfmon_l', # icu4c
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'ulimit', # <ulimit.h> marked obsolescent
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])
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posix = posix - in_posix_and_glibc_but_dead_or_useless
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glibc = glibc - in_posix_and_glibc_but_dead_or_useless
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if not only_unwanted:
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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 glibc (but not posix) but not bionic:')
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for symbol in sorted((glibc - posix).difference(bionic)):
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print(symbol)
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print()
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print('in posix (and implemented in glibc) but not bionic:')
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for symbol in sorted((posix.intersection(glibc)).difference(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 |
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std_stuff | weird_stuff | libresolv_stuff | known)
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for symbol in sorted((bionic - allowed_stuff).difference(glibc)):
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if symbol in ndk_ignored:
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symbol += '*'
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print(symbol)
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sys.exit(0)
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