1#!/usr/bin/env python3 2 3import sys, os, shutil, subprocess, re, difflib 4 5os.environ['LC_ALL'] = 'C' # otherwise 'nm' prints in wrong order 6 7builddir = os.getenv ('builddir', os.path.dirname (__file__)) 8libs = os.getenv ('libs', '.libs') 9 10IGNORED_SYMBOLS = '|'.join(['_fini', '_init', '_fdata', '_ftext', '_fbss', 11 '__bss_start', '__bss_start__', '__bss_end__', '_edata', '_end', '_bss_end__', 12 '__end__', '__gcov_.*', 'llvm_.*', 'flush_fn_list', 'writeout_fn_list', 'mangle_path', 13 'lprofDirMode', 'reset_fn_list']) 14 15nm = os.getenv ('NM', shutil.which ('nm')) 16if not nm: 17 print ('check-symbols.py: \'nm\' not found; skipping test') 18 sys.exit (77) 19 20cxxfilt = shutil.which ('c++filt') 21 22tested = False 23stat = 0 24 25for soname in ['harfbuzz', 'harfbuzz-subset', 'harfbuzz-icu', 'harfbuzz-gobject', 'harfbuzz-cairo']: 26 for suffix in ['so', 'dylib']: 27 so = os.path.join (builddir, libs, 'lib%s.%s' % (soname, suffix)) 28 if not os.path.exists (so): continue 29 30 # On macOS, C symbols are prefixed with _ 31 symprefix = '_' if suffix == 'dylib' else '' 32 33 EXPORTED_SYMBOLS = [s.split ()[2] 34 for s in re.findall (r'^.+ [BCDGIRSTu] .+$', subprocess.check_output (nm.split() + [so]).decode ('utf-8'), re.MULTILINE) 35 if not re.match (r'.* %s(%s)\b' % (symprefix, IGNORED_SYMBOLS), s)] 36 37 # run again c++filt also if is available 38 if cxxfilt: 39 EXPORTED_SYMBOLS = subprocess.check_output ( 40 [cxxfilt], input='\n'.join (EXPORTED_SYMBOLS).encode () 41 ).decode ('utf-8').splitlines () 42 43 prefix = (symprefix + os.path.basename (so)).replace ('libharfbuzz', 'hb').replace ('-', '_').split ('.')[0] 44 45 print ('Checking that %s does not expose internal symbols' % so) 46 suspicious_symbols = [x for x in EXPORTED_SYMBOLS if not re.match (r'^%s(_|$)' % prefix, x)] 47 if suspicious_symbols: 48 print ('Ouch, internal symbols exposed:', suspicious_symbols) 49 stat = 1 50 51 def_path = os.path.join (builddir, soname + '.def') 52 if not os.path.exists (def_path): 53 print ('\'%s\' not found; skipping' % def_path) 54 else: 55 print ('Checking that %s has the same symbol list as %s' % (so, def_path)) 56 with open (def_path, 'r', encoding='utf-8') as f: def_file = f.read () 57 diff_result = list (difflib.context_diff ( 58 def_file.splitlines (), 59 ['EXPORTS'] + [re.sub ('^%shb' % symprefix, 'hb', x) for x in EXPORTED_SYMBOLS] + 60 # cheat: copy the last line from the def file! 61 [def_file.splitlines ()[-1]] 62 )) 63 64 if diff_result: 65 print ('\n'.join (diff_result)) 66 stat = 1 67 68 tested = True 69 70if not tested: 71 print ('check-symbols.py: no shared libraries found; skipping test') 72 sys.exit (77) 73 74sys.exit (stat) 75