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# functions for handling ABI checking of libraries
import Options, Utils, os, Logs, samba_utils, sys, Task, fnmatch, re
from TaskGen import feature, before, after
# these type maps cope with platform specific names for common types
# please add new type mappings into the list below
abi_type_maps = {
'_Bool' : 'bool',
'struct __va_list_tag *' : 'va_list'
}
def normalise_signature(sig):
'''normalise a signature from gdb'''
sig = sig.strip()
sig = re.sub('^\$[0-9]+\s=\s\{*', '', sig)
sig = re.sub('\}(\s0x[0-9a-f]+\s<\w+>)?$', '', sig)
sig = re.sub('0x[0-9a-f]+', '0xXXXX', sig)
for t in abi_type_maps:
# we need to cope with non-word characters in mapped types
m = t
m = m.replace('*', '\*')
if m[-1].isalnum() or m[-1] == '_':
m += '\\b'
if m[0].isalnum() or m[0] == '_':
m = '\\b' + m
sig = re.sub(m, abi_type_maps[t], sig)
return sig
def normalise_varargs(sig):
'''cope with older versions of gdb'''
sig = re.sub(',\s\.\.\.', '', sig)
return sig
def parse_sigs(sigs, abi_match):
'''parse ABI signatures file'''
abi_match = samba_utils.TO_LIST(abi_match)
ret = {}
a = sigs.split('\n')
for s in a:
if s.find(':') == -1:
continue
sa = s.split(':')
if abi_match:
matched = False
for p in abi_match:
if p[0] == '!' and fnmatch.fnmatch(sa[0], p[1:]):
break
elif fnmatch.fnmatch(sa[0], p):
matched = True
break
if not matched:
continue
ret[sa[0]] = normalise_signature(sa[1])
return ret
def save_sigs(sig_file, parsed_sigs):
'''save ABI signatures to a file'''
sigs = ''
for s in sorted(parsed_sigs.keys()):
sigs += '%s: %s\n' % (s, parsed_sigs[s])
return samba_utils.save_file(sig_file, sigs, create_dir=True)
def abi_check_task(self):
'''check if the ABI has changed'''
abi_gen = self.ABI_GEN
libpath = self.inputs[0].abspath(self.env)
libname = os.path.basename(libpath)
sigs = Utils.cmd_output([abi_gen, libpath])
parsed_sigs = parse_sigs(sigs, self.ABI_MATCH)
sig_file = self.ABI_FILE
old_sigs = samba_utils.load_file(sig_file)
if old_sigs is None or Options.options.ABI_UPDATE:
if not save_sigs(sig_file, parsed_sigs):
raise Utils.WafError('Failed to save ABI file "%s"' % sig_file)
Logs.warn('Generated ABI signatures %s' % sig_file)
return
parsed_old_sigs = parse_sigs(old_sigs, self.ABI_MATCH)
# check all old sigs
got_error = False
for s in parsed_old_sigs:
if not s in parsed_sigs:
Logs.error('%s: symbol %s has been removed - please update major version\n\tsignature: %s' % (
libname, s, parsed_old_sigs[s]))
got_error = True
elif normalise_varargs(parsed_old_sigs[s]) != normalise_varargs(parsed_sigs[s]):
Logs.error('%s: symbol %s has changed - please update major version\n\told_signature: %s\n\tnew_signature: %s' % (
libname, s, parsed_old_sigs[s], parsed_sigs[s]))
got_error = True
for s in parsed_sigs:
if not s in parsed_old_sigs:
Logs.error('%s: symbol %s has been added - please mark it _PRIVATE_ or update minor version\n\tsignature: %s' % (
libname, s, parsed_sigs[s]))
got_error = True
if got_error:
raise Utils.WafError('ABI for %s has changed - please fix library version then build with --abi-update\nSee http://wiki.samba.org/index.php/Waf#ABI_Checking for more information' % libname)
t = Task.task_type_from_func('abi_check', abi_check_task, color='BLUE', ext_in='.bin')
t.quiet = True
# allow "waf --abi-check" to force re-checking the ABI
if '--abi-check' in sys.argv:
Task.always_run(t)
@after('apply_link')
@feature('abi_check')
def abi_check(self):
'''check that ABI matches saved signatures'''
env = self.bld.env
if not env.ABI_CHECK or self.abi_file is None:
return
# if the platform doesn't support -fvisibility=hidden then the ABI
# checks become fairly meaningless
if not env.HAVE_VISIBILITY_ATTR:
return
topsrc = self.bld.srcnode.abspath()
abi_gen = os.path.join(topsrc, 'buildtools/scripts/abi_gen.sh')
tsk = self.create_task('abi_check', self.link_task.outputs[0])
tsk.ABI_FILE = self.abi_file
tsk.ABI_MATCH = self.abi_match
tsk.ABI_GEN = abi_gen
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