| #!/usr/bin/env python3 |
| |
| import argparse |
| import os |
| import platform |
| import subprocess |
| |
| # This list contains symbols that _might_ be exported for some platforms |
| PLATFORM_SYMBOLS = [ |
| '__bss_end__', |
| '__bss_start__', |
| '__bss_start', |
| '__end__', |
| '_bss_end__', |
| '_edata', |
| '_end', |
| '_fini', |
| '_init', |
| ] |
| |
| |
| def get_symbols(nm, lib): |
| ''' |
| List all the (non platform-specific) symbols exported by the library |
| ''' |
| symbols = [] |
| platform_name = platform.system() |
| output = subprocess.check_output([nm, '-gP', lib], |
| stderr=open(os.devnull, 'w')).decode("ascii") |
| for line in output.splitlines(): |
| fields = line.split() |
| if len(fields) == 2 or fields[1] == 'U': |
| continue |
| symbol_name = fields[0] |
| if platform_name == 'Linux': |
| if symbol_name in PLATFORM_SYMBOLS: |
| continue |
| elif platform_name == 'Darwin': |
| assert symbol_name[0] == '_' |
| symbol_name = symbol_name[1:] |
| symbols.append(symbol_name) |
| |
| return symbols |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser() |
| parser.add_argument('--symbols-file', |
| action='store', |
| required=True, |
| help='path to file containing symbols') |
| parser.add_argument('--lib', |
| action='store', |
| required=True, |
| help='path to library') |
| parser.add_argument('--nm', |
| action='store', |
| required=True, |
| help='path to binary (or name in $PATH)') |
| args = parser.parse_args() |
| |
| try: |
| lib_symbols = get_symbols(args.nm, args.lib) |
| except: |
| # We can't run this test, but we haven't technically failed it either |
| # Return the GNU "skip" error code |
| exit(77) |
| mandatory_symbols = [] |
| optional_symbols = [] |
| with open(args.symbols_file) as symbols_file: |
| qualifier_optional = '(optional)' |
| for line in symbols_file.readlines(): |
| |
| # Strip comments |
| line = line.split('#')[0] |
| line = line.strip() |
| if not line: |
| continue |
| |
| # Line format: |
| # [qualifier] symbol |
| qualifier = None |
| symbol = None |
| |
| fields = line.split() |
| if len(fields) == 1: |
| symbol = fields[0] |
| elif len(fields) == 2: |
| qualifier = fields[0] |
| symbol = fields[1] |
| else: |
| print(args.symbols_file + ': invalid format: ' + line) |
| exit(1) |
| |
| # The only supported qualifier is 'optional', which means the |
| # symbol doesn't have to be exported by the library |
| if qualifier and not qualifier == qualifier_optional: |
| print(args.symbols_file + ': invalid qualifier: ' + qualifier) |
| exit(1) |
| |
| if qualifier == qualifier_optional: |
| optional_symbols.append(symbol) |
| else: |
| mandatory_symbols.append(symbol) |
| |
| unknown_symbols = [] |
| for symbol in lib_symbols: |
| if symbol in mandatory_symbols: |
| continue |
| if symbol in optional_symbols: |
| continue |
| unknown_symbols.append(symbol) |
| |
| missing_symbols = [ |
| sym for sym in mandatory_symbols if sym not in lib_symbols |
| ] |
| |
| for symbol in unknown_symbols: |
| print(args.lib + ': unknown symbol exported: ' + symbol) |
| |
| for symbol in missing_symbols: |
| print(args.lib + ': missing symbol: ' + symbol) |
| |
| if unknown_symbols or missing_symbols: |
| exit(1) |
| exit(0) |
| |
| |
| if __name__ == '__main__': |
| main() |