diff --git a/contrib/devtools/symbol-check.py b/contrib/devtools/symbol-check.py index 3d81db042..1f196eb33 100755 --- a/contrib/devtools/symbol-check.py +++ b/contrib/devtools/symbol-check.py @@ -1,179 +1,179 @@ #!/usr/bin/env python # Copyright (c) 2014 Wladimir J. van der Laan # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. ''' A script to check that the (Linux) executables produced by gitian only contain allowed gcc, glibc and libstdc++ version symbols. This makes sure they are still compatible with the minimum supported Linux distribution versions. Example usage: find ../gitian-builder/build -type f -executable | xargs python contrib/devtools/symbol-check.py ''' from __future__ import division, print_function, unicode_literals import subprocess import re import sys import os -# Debian 6.0.9 (Squeeze) has: +# Debian 8.11 (Jessie) has: # -# - g++ version 4.4.5 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=g%2B%2B) -# - libc version 2.11.3 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=libc6) -# - libstdc++ version 4.4.5 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=libstdc%2B%2B6) +# - g++ version 4.9.2 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=g%2B%2B) +# - libc version 2.19.18 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=libc6) +# - libstdc++ version 4.8.4 (https://packages.debian.org/search?suite=default§ion=all&arch=any&searchon=names&keywords=libstdc%2B%2B6) # -# Ubuntu 10.04.4 (Lucid Lynx) has: +# Ubuntu 14.04 (Trusty Tahr) has: # -# - g++ version 4.4.3 (http://packages.ubuntu.com/search?keywords=g%2B%2B&searchon=names&suite=lucid§ion=all) -# - libc version 2.11.1 (http://packages.ubuntu.com/search?keywords=libc6&searchon=names&suite=lucid§ion=all) -# - libstdc++ version 4.4.3 (http://packages.ubuntu.com/search?suite=lucid§ion=all&arch=any&keywords=libstdc%2B%2B&searchon=names) +# - g++ version 4.8.2 (https://packages.ubuntu.com/search?suite=trusty§ion=all&arch=any&keywords=g%2B%2B&searchon=names) +# - libc version 2.19.0 (https://packages.ubuntu.com/search?suite=trusty§ion=all&arch=any&keywords=libc6&searchon=names) +# - libstdc++ version 4.8.2 (https://packages.ubuntu.com/search?suite=trusty§ion=all&arch=any&keywords=libstdc%2B%2B&searchon=names) # # 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: -# GCC 4.4.0: GCC_4.4.0 -# GCC 4.4.2: GLIBCXX_3.4.13, CXXABI_1.3.3 -# (glibc) GLIBC_2_11 +# GCC 4.8.0: GCC_4.8.0 +# GCC 4.8.0: GLIBCXX_3.4.18, CXXABI_1.3.7 +# (glibc) GLIBC_2_19 # MAX_VERSIONS = { - 'GCC': (4, 4, 0), - 'CXXABI': (1, 3, 3), - 'GLIBCXX': (3, 4, 13), - 'GLIBC': (2, 11) + 'GCC': (4, 8, 0), + 'CXXABI': (1, 3, 7), + 'GLIBCXX': (3, 4, 18), + 'GLIBC': (2, 19) } # See here for a description of _IO_stdin_used: # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=634261#109 # Ignore symbols that are exported as part of every executable IGNORE_EXPORTS = { '_edata', '_end', '_init', '__bss_start', '_fini', '_IO_stdin_used', 'stdin', 'stdout', 'stderr', # Figure out why we get these symbols exported on xenial. '_ZNKSt5ctypeIcE8do_widenEc', 'in6addr_any', 'optarg', '_ZNSt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE10_M_destroyEv' } READELF_CMD = os.getenv('READELF', '/usr/bin/readelf') CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt') # Allowed NEEDED libraries ALLOWED_LIBRARIES = { # bitcoind and bitcoin-qt 'libgcc_s.so.1', # GCC base support 'libc.so.6', # C library 'libpthread.so.0', # threading 'libanl.so.1', # DNS resolve 'libm.so.6', # math library 'librt.so.1', # real-time (clock) 'ld-linux-x86-64.so.2', # 64-bit dynamic linker 'ld-linux.so.2', # 32-bit dynamic linker # bitcoin-qt only 'libX11-xcb.so.1', # part of X11 'libX11.so.6', # part of X11 'libxcb.so.1', # part of X11 'libfontconfig.so.1', # font support 'libfreetype.so.6', # font parsing 'libdl.so.2' # programming interface to dynamic linker } class CPPFilt(object): ''' Demangle C++ symbol names. Use a pipe to the 'c++filt' command. ''' def __init__(self): self.proc = subprocess.Popen( CPPFILT_CMD, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True) def __call__(self, mangled): self.proc.stdin.write(mangled + '\n') self.proc.stdin.flush() return self.proc.stdout.readline().rstrip() def close(self): self.proc.stdin.close() self.proc.stdout.close() self.proc.wait() def read_symbols(executable, imports=True): ''' Parse an ELF executable and return a list of (symbol,version) tuples for dynamic, imported symbols. ''' p = subprocess.Popen([READELF_CMD, '--dyn-syms', '-W', executable], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True) (stdout, stderr) = p.communicate() if p.returncode: raise IOError('Could not read symbols for %s: %s' % (executable, stderr.strip())) syms = [] for line in stdout.splitlines(): line = line.split() if len(line) > 7 and re.match('[0-9]+:$', line[0]): (sym, _, version) = line[7].partition('@') is_import = line[6] == 'UND' if version.startswith('@'): version = version[1:] if is_import == imports: syms.append((sym, version)) return syms def check_version(max_versions, version): if '_' in version: (lib, _, ver) = version.rpartition('_') else: lib = version ver = '0' ver = tuple([int(x) for x in ver.split('.')]) if not lib in max_versions: return False return ver <= max_versions[lib] def read_libraries(filename): p = subprocess.Popen([READELF_CMD, '-d', '-W', filename], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True) (stdout, stderr) = p.communicate() if p.returncode: raise IOError('Error opening file') libraries = [] for line in stdout.splitlines(): tokens = line.split() if len(tokens) > 2 and tokens[1] == '(NEEDED)': match = re.match( '^Shared library: \[(.*)\]$', ' '.join(tokens[2:])) if match: libraries.append(match.group(1)) else: raise ValueError('Unparseable (NEEDED) specification') return libraries if __name__ == '__main__': cppfilt = CPPFilt() retval = 0 for filename in sys.argv[1:]: # Check imported symbols for sym, version in read_symbols(filename, True): if version and not check_version(MAX_VERSIONS, version): print('%s: symbol %s from unsupported version %s' % (filename, cppfilt(sym), version)) retval = 1 # Check exported symbols for sym, version in read_symbols(filename, False): if sym in IGNORE_EXPORTS: continue print('%s: export of symbol %s not allowed' % (filename, cppfilt(sym))) retval = 1 # Check dependency libraries for library_name in read_libraries(filename): if library_name not in ALLOWED_LIBRARIES: print('%s: NEEDED library %s is not allowed' % (filename, library_name)) retval = 1 sys.exit(retval)