3 import sys, os, shutil, subprocess, re, difflib
5 os.environ['LC_ALL'] = 'C' # otherwise 'nm' prints in wrong order
7 builddir = os.environ.get ('builddir', os.path.dirname (__file__))
8 libs = os.environ.get ('libs', '.libs')
10 IGNORED_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'])
14 nm = shutil.which ('nm')
16 print ('check-symbols.py: \'nm\' not found; skipping test')
19 cxxflit = shutil.which ('c++filt')
24 for soname in ['harfbuzz', 'harfbuzz-subset', 'harfbuzz-icu', 'harfbuzz-gobject']:
25 for suffix in ['so', 'dylib']:
26 so = os.path.join (builddir, libs, 'lib%s.%s' % (soname, suffix))
27 if not os.path.exists (so): continue
29 # On macOS, C symbols are prefixed with _
30 symprefix = '_' if suffix == 'dylib' else ''
32 EXPORTED_SYMBOLS = [s.split ()[2]
33 for s in re.findall (r'^.+ [BCDGIRST] .+$', subprocess.check_output ([nm, so]).decode ('utf-8'), re.MULTILINE)
34 if not re.match (r'.* %s(%s)\b' % (symprefix, IGNORED_SYMBOLS), s)]
36 # run again c++flit also if is available
38 EXPORTED_SYMBOLS = subprocess.check_output (
39 [cxxflit], input='\n'.join (EXPORTED_SYMBOLS).encode ()
40 ).decode ('utf-8').splitlines ()
42 prefix = (symprefix + os.path.basename (so)).replace ('libharfbuzz', 'hb').replace ('-', '_').split ('.')[0]
44 print ('Checking that %s does not expose internal symbols' % so)
45 suspicious_symbols = [x for x in EXPORTED_SYMBOLS if not re.match (r'^%s(_|$)' % prefix, x)]
46 if suspicious_symbols:
47 print ('Ouch, internal symbols exposed:', suspicious_symbols)
50 def_path = os.path.join (builddir, soname + '.def')
51 if not os.path.exists (def_path):
52 print ('\'%s\' not found; skipping' % def_path)
54 print ('Checking that %s has the same symbol list as %s' % (so, def_path))
55 with open (def_path, 'r', encoding='utf-8') as f: def_file = f.read ()
56 diff_result = list (difflib.context_diff (
57 def_file.splitlines (),
58 ['EXPORTS'] + [re.sub ('^%shb' % symprefix, 'hb', x) for x in EXPORTED_SYMBOLS] +
59 # cheat: copy the last line from the def file!
60 [def_file.splitlines ()[-1]]
64 print ('\n'.join (diff_result))
70 print ('check-symbols.sh: no shared libraries found; skipping test')