Differential D4095 Diff 13866 contrib/devtools/symbol-check.py

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contrib/devtools/symbol-check.py

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# Taking the minimum of these as our target.		# Taking the minimum of these as our target.
#		#
# According to GNU ABI document (http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html) this corresponds to:		# According to GNU ABI document (http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html) this corresponds to:
# GCC 4.8.0: GCC_4.8.0		# GCC 4.8.0: GCC_4.8.0
# GCC 4.8.0: GLIBCXX_3.4.18, CXXABI_1.3.7		# GCC 4.8.0: GLIBCXX_3.4.18, CXXABI_1.3.7
# (glibc) GLIBC_2_19		# (glibc) GLIBC_2_19
#		#
MAX_VERSIONS = {		MAX_VERSIONS = {
'GCC': (4, 8, 0),		'GCC': (4, 8, 0),
'CXXABI': (1, 3, 7),		'CXXABI': (1, 3, 7),
'GLIBCXX': (3, 4, 18),		'GLIBCXX': (3, 4, 18),
'GLIBC': (2, 19)		'GLIBC': (2, 19),
		'LIBATOMIC': (1, 0)
}		}
# See here for a description of _IO_stdin_used:		# See here for a description of _IO_stdin_used:
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109		# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109

# Ignore symbols that are exported as part of every executable		# Ignore symbols that are exported as part of every executable
IGNORE_EXPORTS = {		IGNORE_EXPORTS = {
'_edata', '_end', '_init', '__bss_start', '_fini', '_IO_stdin_used', 'stdin', 'stdout', 'stderr',		'_edata', '_end', '__end__', '_init', '__bss_start', '__bss_start__', '_bss_end__', '__bss_end__', '_fini', '_IO_stdin_used', 'stdin', 'stdout', 'stderr',
# Figure out why we get these symbols exported on xenial.		# Figure out why we get these symbols exported on xenial.
'_ZNKSt5ctypeIcE8do_widenEc', 'in6addr_any', 'optarg',		'_ZNKSt5ctypeIcE8do_widenEc', 'in6addr_any', 'optarg',
'_ZNSt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE10_M_destroyEv'		'_ZNSt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE10_M_destroyEv'
}		}
READELF_CMD = os.getenv('READELF', '/usr/bin/readelf')		READELF_CMD = os.getenv('READELF', '/usr/bin/readelf')
CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt')		CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt')
# Allowed NEEDED libraries		# Allowed NEEDED libraries
ALLOWED_LIBRARIES = {		ALLOWED_LIBRARIES = {
# bitcoind and bitcoin-qt		# bitcoind and bitcoin-qt
'libgcc_s.so.1', # GCC base support		'libgcc_s.so.1', # GCC base support
'libc.so.6', # C library		'libc.so.6', # C library
'libpthread.so.0', # threading		'libpthread.so.0', # threading
'libanl.so.1', # DNS resolve		'libanl.so.1', # DNS resolve
'libm.so.6', # math library		'libm.so.6', # math library
'librt.so.1', # real-time (clock)		'librt.so.1', # real-time (clock)
		'libatomic.so.1',
'ld-linux-x86-64.so.2', # 64-bit dynamic linker		'ld-linux-x86-64.so.2', # 64-bit dynamic linker
'ld-linux.so.2', # 32-bit dynamic linker		'ld-linux.so.2', # 32-bit dynamic linker
		'ld-linux-aarch64.so.1', # 64-bit ARM dynamic linker
		'ld-linux-armhf.so.3', # 32-bit ARM dynamic linker
# bitcoin-qt only		# bitcoin-qt only
'libX11-xcb.so.1', # part of X11		'libX11-xcb.so.1', # part of X11
'libX11.so.6', # part of X11		'libX11.so.6', # part of X11
'libxcb.so.1', # part of X11		'libxcb.so.1', # part of X11
'libfontconfig.so.1', # font support		'libfontconfig.so.1', # font support
'libfreetype.so.6', # font parsing		'libfreetype.so.6', # font parsing
'libdl.so.2' # programming interface to dynamic linker		'libdl.so.2' # programming interface to dynamic linker
}		}
		ARCH_MIN_GLIBC_VER = {
		'80386': (2, 1),
		'X86-64': (2, 2, 5),
		'ARM': (2, 4),
		'AArch64': (2, 17)
		}


class CPPFilt(object):		class CPPFilt(object):
'''		'''
Demangle C++ symbol names.		Demangle C++ symbol names.

Use a pipe to the 'c++filt' command.		Use a pipe to the 'c++filt' command.
'''		'''
Show All 13 Lines	def close(self):
self.proc.wait()		self.proc.wait()


def read_symbols(executable, imports=True):		def read_symbols(executable, imports=True):
'''		'''
Parse an ELF executable and return a list of (symbol,version) tuples		Parse an ELF executable and return a list of (symbol,version) tuples
for dynamic, imported symbols.		for dynamic, imported symbols.
'''		'''
p = subprocess.Popen([READELF_CMD, '--dyn-syms', '-W', executable], stdout=subprocess.PIPE,		p = subprocess.Popen([READELF_CMD, '--dyn-syms', '-W', '-h', executable], stdout=subprocess.PIPE,
stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)		stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)
(stdout, stderr) = p.communicate()		(stdout, stderr) = p.communicate()
if p.returncode:		if p.returncode:
raise IOError('Could not read symbols for {}: {}'.format(		raise IOError('Could not read symbols for {}: {}'.format(
executable, stderr.strip()))		executable, stderr.strip()))
syms = []		syms = []
for line in stdout.splitlines():		for line in stdout.splitlines():
line = line.split()		line = line.split()
		if 'Machine:' in line:
		arch = line[-1]
if len(line) > 7 and re.match('[0-9]+:$', line[0]):		if len(line) > 7 and re.match('[0-9]+:$', line[0]):
(sym, _, version) = line[7].partition('@')		(sym, _, version) = line[7].partition('@')
is_import = line[6] == 'UND'		is_import = line[6] == 'UND'
if version.startswith('@'):		if version.startswith('@'):
version = version[1:]		version = version[1:]
if is_import == imports:		if is_import == imports:
syms.append((sym, version))		syms.append((sym, version, arch))
return syms		return syms


def check_version(max_versions, version):		def check_version(max_versions, version, arch):
if '_' in version:		if '_' in version:
(lib, _, ver) = version.rpartition('_')		(lib, _, ver) = version.rpartition('_')
else:		else:
lib = version		lib = version
ver = '0'		ver = '0'
ver = tuple([int(x) for x in ver.split('.')])		ver = tuple([int(x) for x in ver.split('.')])
if not lib in max_versions:		if not lib in max_versions:
return False		return False
return ver <= max_versions[lib]		return ver <= max_versions[lib] or lib == 'GLIBC' and ver <= ARCH_MIN_GLIBC_VER[arch]


def read_libraries(filename):		def read_libraries(filename):
p = subprocess.Popen([READELF_CMD, '-d', '-W', filename], stdout=subprocess.PIPE,		p = subprocess.Popen([READELF_CMD, '-d', '-W', filename], stdout=subprocess.PIPE,
stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)		stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)
(stdout, stderr) = p.communicate()		(stdout, stderr) = p.communicate()
if p.returncode:		if p.returncode:
raise IOError('Error opening file')		raise IOError('Error opening file')
Show All 10 Lines	def read_libraries(filename):
return libraries		return libraries


if __name__ == '__main__':		if __name__ == '__main__':
cppfilt = CPPFilt()		cppfilt = CPPFilt()
retval = 0		retval = 0
for filename in sys.argv[1:]:		for filename in sys.argv[1:]:
# Check imported symbols		# Check imported symbols
for sym, version in read_symbols(filename, True):		for sym, version, arch in read_symbols(filename, True):
if version and not check_version(MAX_VERSIONS, version):		if version and not check_version(MAX_VERSIONS, version, arch):
print('{}: symbol {} from unsupported version {}'.format(		print('{}: symbol {} from unsupported version {}'.format(
filename, cppfilt(sym), version))		filename, cppfilt(sym), version))
retval = 1		retval = 1
# Check exported symbols		# Check exported symbols
for sym, version in read_symbols(filename, False):		for sym, version, arch in read_symbols(filename, False):
if sym in IGNORE_EXPORTS:		if sym in IGNORE_EXPORTS:
continue		continue
print('{}: export of symbol {} not allowed'.format(		print('{}: export of symbol {} not allowed'.format(
filename, cppfilt(sym)))		filename, cppfilt(sym)))
retval = 1		retval = 1
# Check dependency libraries		# Check dependency libraries
for library_name in read_libraries(filename):		for library_name in read_libraries(filename):
if library_name not in ALLOWED_LIBRARIES:		if library_name not in ALLOWED_LIBRARIES:
print('{}: NEEDED library {} is not allowed'.format(		print('{}: NEEDED library {} is not allowed'.format(
filename, library_name))		filename, library_name))
retval = 1		retval = 1

sys.exit(retval)		sys.exit(retval)