1 # functions for handling ABI checking of libraries
3 import Options, Utils, os, Logs, samba_utils, sys, Task, fnmatch, re, Build
4 from TaskGen import feature, before, after
6 # these type maps cope with platform specific names for common types
7 # please add new type mappings into the list below
10 'struct __va_list_tag *' : 'va_list'
13 version_key = lambda x: map(int, x.split("."))
15 def normalise_signature(sig):
16 '''normalise a signature from gdb'''
18 sig = re.sub('^\$[0-9]+\s=\s\{(.+)\}$', r'\1', sig)
19 sig = re.sub('^\$[0-9]+\s=\s\{(.+)\}(\s0x[0-9a-f]+\s<\w+>)+$', r'\1', sig)
20 sig = re.sub('^\$[0-9]+\s=\s(0x[0-9a-f]+)\s?(<\w+>)?$', r'\1', sig)
21 sig = re.sub('0x[0-9a-f]+', '0xXXXX', sig)
22 sig = re.sub('", <incomplete sequence (\\\\[a-z0-9]+)>', r'\1"', sig)
24 for t in abi_type_maps:
25 # we need to cope with non-word characters in mapped types
27 m = m.replace('*', '\*')
28 if m[-1].isalnum() or m[-1] == '_':
30 if m[0].isalnum() or m[0] == '_':
32 sig = re.sub(m, abi_type_maps[t], sig)
36 def normalise_varargs(sig):
37 '''cope with older versions of gdb'''
38 sig = re.sub(',\s\.\.\.', '', sig)
42 def parse_sigs(sigs, abi_match):
43 '''parse ABI signatures file'''
44 abi_match = samba_utils.TO_LIST(abi_match)
55 if p[0] == '!' and fnmatch.fnmatch(sa[0], p[1:]):
58 elif fnmatch.fnmatch(sa[0], p):
61 if (not matched) and negative:
63 Logs.debug("%s -> %s" % (sa[1], normalise_signature(sa[1])))
64 ret[sa[0]] = normalise_signature(sa[1])
67 def save_sigs(sig_file, parsed_sigs):
68 '''save ABI signatures to a file'''
70 for s in sorted(parsed_sigs.keys()):
71 sigs += '%s: %s\n' % (s, parsed_sigs[s])
72 return samba_utils.save_file(sig_file, sigs, create_dir=True)
75 def abi_check_task(self):
76 '''check if the ABI has changed'''
77 abi_gen = self.ABI_GEN
79 libpath = self.inputs[0].abspath(self.env)
80 libname = os.path.basename(libpath)
82 sigs = Utils.cmd_output([abi_gen, libpath])
83 parsed_sigs = parse_sigs(sigs, self.ABI_MATCH)
85 sig_file = self.ABI_FILE
87 old_sigs = samba_utils.load_file(sig_file)
88 if old_sigs is None or Options.options.ABI_UPDATE:
89 if not save_sigs(sig_file, parsed_sigs):
90 raise Utils.WafError('Failed to save ABI file "%s"' % sig_file)
91 Logs.warn('Generated ABI signatures %s' % sig_file)
94 parsed_old_sigs = parse_sigs(old_sigs, self.ABI_MATCH)
98 for s in parsed_old_sigs:
99 if not s in parsed_sigs:
100 Logs.error('%s: symbol %s has been removed - please update major version\n\tsignature: %s' % (
101 libname, s, parsed_old_sigs[s]))
103 elif normalise_varargs(parsed_old_sigs[s]) != normalise_varargs(parsed_sigs[s]):
104 Logs.error('%s: symbol %s has changed - please update major version\n\told_signature: %s\n\tnew_signature: %s' % (
105 libname, s, parsed_old_sigs[s], parsed_sigs[s]))
108 for s in parsed_sigs:
109 if not s in parsed_old_sigs:
110 Logs.error('%s: symbol %s has been added - please mark it _PRIVATE_ or update minor version\n\tsignature: %s' % (
111 libname, s, parsed_sigs[s]))
115 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\nIf you have not changed any ABI, and your platform always gives this error, please configure with --abi-check-disable to skip this check' % libname)
118 t = Task.task_type_from_func('abi_check', abi_check_task, color='BLUE', ext_in='.bin')
120 # allow "waf --abi-check" to force re-checking the ABI
121 if '--abi-check' in sys.argv:
125 @feature('abi_check')
127 '''check that ABI matches saved signatures'''
129 if not env.ABI_CHECK or self.abi_directory is None:
132 # if the platform doesn't support -fvisibility=hidden then the ABI
133 # checks become fairly meaningless
134 if not env.HAVE_VISIBILITY_ATTR:
137 topsrc = self.bld.srcnode.abspath()
138 abi_gen = os.path.join(topsrc, 'buildtools/scripts/abi_gen.sh')
140 abi_file = "%s/%s-%s.sigs" % (self.abi_directory, self.name, self.vnum)
142 tsk = self.create_task('abi_check', self.link_task.outputs[0])
143 tsk.ABI_FILE = abi_file
144 tsk.ABI_MATCH = self.abi_match
145 tsk.ABI_GEN = abi_gen
148 def abi_process_file(fname, version, symmap):
149 '''process one ABI file, adding new symbols to the symmap'''
150 f = open(fname, mode='r')
152 symname = line.split(":")[0]
153 if not symname in symmap:
154 symmap[symname] = version
158 def abi_write_vscript(f, libname, current_version, versions, symmap, abi_match):
159 """Write a vscript file for a library in --version-script format.
161 :param f: File-like object to write to
162 :param libname: Name of the library, uppercased
163 :param current_version: Current version
164 :param versions: Versions to consider
165 :param symmap: Dictionary mapping symbols -> version
166 :param abi_match: List of symbols considered to be public in the current
172 invmap.setdefault(symmap[s], []).append(s)
175 versions = sorted(versions, key=version_key)
177 symver = "%s_%s" % (libname, k)
178 if symver == current_version:
180 f.write("%s {\n" % symver)
181 if k in sorted(invmap.keys()):
182 f.write("\tglobal:\n")
183 for s in invmap.get(k, []):
184 f.write("\t\t%s;\n" % s);
185 f.write("}%s;\n\n" % last_key)
186 last_key = " %s" % symver
187 f.write("%s {\n" % current_version)
188 local_abi = filter(lambda x: x[0] == '!', abi_match)
189 global_abi = filter(lambda x: x[0] != '!', abi_match)
190 f.write("\tglobal:\n")
191 if len(global_abi) > 0:
193 f.write("\t\t%s;\n" % x)
196 if abi_match != ["*"]:
197 f.write("\tlocal:\n")
199 f.write("\t\t%s;\n" % x[1:])
200 if len(global_abi) > 0:
205 def abi_build_vscript(task):
206 '''generate a vscript file for our public libraries'''
208 tgt = task.outputs[0].bldpath(task.env)
212 for f in task.inputs:
213 fname = f.abspath(task.env)
214 basename = os.path.basename(fname)
215 version = basename[len(task.env.LIBNAME)+1:-len(".sigs")]
216 versions.append(version)
217 abi_process_file(fname, version, symmap)
218 f = open(tgt, mode='w')
220 abi_write_vscript(f, task.env.LIBNAME, task.env.VERSION, versions,
221 symmap, task.env.ABI_MATCH)
226 def ABI_VSCRIPT(bld, libname, abi_directory, version, vscript, abi_match=None):
227 '''generate a vscript file for our public libraries'''
229 source = bld.path.ant_glob('%s/%s-[0-9]*.sigs' % (abi_directory, libname))
230 def abi_file_key(path):
231 return version_key(path[:-len(".sigs")].rsplit("-")[-1])
232 source = sorted(source.split(), key=abi_file_key)
236 libname = os.path.basename(libname)
237 version = os.path.basename(version)
238 libname = libname.replace("-", "_").replace("+","_").upper()
239 version = version.replace("-", "_").replace("+","_").upper()
241 t = bld.SAMBA_GENERATOR(vscript,
242 rule=abi_build_vscript,
246 if abi_match is None:
249 abi_match = samba_utils.TO_LIST(abi_match)
250 t.env.ABI_MATCH = abi_match
251 t.env.VERSION = version
252 t.env.LIBNAME = libname
253 t.vars = ['LIBNAME', 'VERSION', 'ABI_MATCH']
254 Build.BuildContext.ABI_VSCRIPT = ABI_VSCRIPT