| 1 | # a waf tool to extract symbols from object files or libraries
|
|---|
| 2 | # using nm, producing a set of exposed defined/undefined symbols
|
|---|
| 3 |
|
|---|
| 4 | import os, re, subprocess
|
|---|
| 5 | import Utils, Build, Options, Logs
|
|---|
| 6 | from Logs import debug
|
|---|
| 7 | from samba_utils import TO_LIST, LOCAL_CACHE, get_tgt_list, os_path_relpath
|
|---|
| 8 |
|
|---|
| 9 | # these are the data structures used in symbols.py:
|
|---|
| 10 | #
|
|---|
| 11 | # bld.env.symbol_map : dictionary mapping public symbol names to list of
|
|---|
| 12 | # subsystem names where that symbol exists
|
|---|
| 13 | #
|
|---|
| 14 | # t.in_library : list of libraries that t is in
|
|---|
| 15 | #
|
|---|
| 16 | # bld.env.public_symbols: set of public symbols for each subsystem
|
|---|
| 17 | # bld.env.used_symbols : set of used symbols for each subsystem
|
|---|
| 18 | #
|
|---|
| 19 | # bld.env.syslib_symbols: dictionary mapping system library name to set of symbols
|
|---|
| 20 | # for that library
|
|---|
| 21 | # bld.env.library_dict : dictionary mapping built library paths to subsystem names
|
|---|
| 22 | #
|
|---|
| 23 | # LOCAL_CACHE(bld, 'TARGET_TYPE') : dictionary mapping subsystem name to target type
|
|---|
| 24 |
|
|---|
| 25 |
|
|---|
| 26 | def symbols_extract(bld, objfiles, dynamic=False):
|
|---|
| 27 | '''extract symbols from objfile, returning a dictionary containing
|
|---|
| 28 | the set of undefined and public symbols for each file'''
|
|---|
| 29 |
|
|---|
| 30 | ret = {}
|
|---|
| 31 |
|
|---|
| 32 | # see if we can get some results from the nm cache
|
|---|
| 33 | if not bld.env.nm_cache:
|
|---|
| 34 | bld.env.nm_cache = {}
|
|---|
| 35 |
|
|---|
| 36 | objfiles = set(objfiles).copy()
|
|---|
| 37 |
|
|---|
| 38 | remaining = set()
|
|---|
| 39 | for obj in objfiles:
|
|---|
| 40 | if obj in bld.env.nm_cache:
|
|---|
| 41 | ret[obj] = bld.env.nm_cache[obj].copy()
|
|---|
| 42 | else:
|
|---|
| 43 | remaining.add(obj)
|
|---|
| 44 | objfiles = remaining
|
|---|
| 45 |
|
|---|
| 46 | if len(objfiles) == 0:
|
|---|
| 47 | return ret
|
|---|
| 48 |
|
|---|
| 49 | cmd = ["nm"]
|
|---|
| 50 | if dynamic:
|
|---|
| 51 | # needed for some .so files
|
|---|
| 52 | cmd.append("-D")
|
|---|
| 53 | cmd.extend(list(objfiles))
|
|---|
| 54 |
|
|---|
| 55 | nmpipe = subprocess.Popen(cmd, stdout=subprocess.PIPE).stdout
|
|---|
| 56 | if len(objfiles) == 1:
|
|---|
| 57 | filename = list(objfiles)[0]
|
|---|
| 58 | ret[filename] = { "PUBLIC": set(), "UNDEFINED" : set()}
|
|---|
| 59 |
|
|---|
| 60 | for line in nmpipe:
|
|---|
| 61 | line = line.strip()
|
|---|
| 62 | if line.endswith(':'):
|
|---|
| 63 | filename = line[:-1]
|
|---|
| 64 | ret[filename] = { "PUBLIC": set(), "UNDEFINED" : set() }
|
|---|
| 65 | continue
|
|---|
| 66 | cols = line.split(" ")
|
|---|
| 67 | if cols == ['']:
|
|---|
| 68 | continue
|
|---|
| 69 | # see if the line starts with an address
|
|---|
| 70 | if len(cols) == 3:
|
|---|
| 71 | symbol_type = cols[1]
|
|---|
| 72 | symbol = cols[2]
|
|---|
| 73 | else:
|
|---|
| 74 | symbol_type = cols[0]
|
|---|
| 75 | symbol = cols[1]
|
|---|
| 76 | if symbol_type in "BDGTRVWSi":
|
|---|
| 77 | # its a public symbol
|
|---|
| 78 | ret[filename]["PUBLIC"].add(symbol)
|
|---|
| 79 | elif symbol_type in "U":
|
|---|
| 80 | ret[filename]["UNDEFINED"].add(symbol)
|
|---|
| 81 |
|
|---|
| 82 | # add to the cache
|
|---|
| 83 | for obj in objfiles:
|
|---|
| 84 | if obj in ret:
|
|---|
| 85 | bld.env.nm_cache[obj] = ret[obj].copy()
|
|---|
| 86 | else:
|
|---|
| 87 | bld.env.nm_cache[obj] = { "PUBLIC": set(), "UNDEFINED" : set() }
|
|---|
| 88 |
|
|---|
| 89 | return ret
|
|---|
| 90 |
|
|---|
| 91 |
|
|---|
| 92 | def real_name(name):
|
|---|
| 93 | if name.find(".objlist") != -1:
|
|---|
| 94 | name = name[:-8]
|
|---|
| 95 | return name
|
|---|
| 96 |
|
|---|
| 97 |
|
|---|
| 98 | def find_ldd_path(bld, libname, binary):
|
|---|
| 99 | '''find the path to the syslib we will link against'''
|
|---|
| 100 | ret = None
|
|---|
| 101 | if not bld.env.syslib_paths:
|
|---|
| 102 | bld.env.syslib_paths = {}
|
|---|
| 103 | if libname in bld.env.syslib_paths:
|
|---|
| 104 | return bld.env.syslib_paths[libname]
|
|---|
| 105 |
|
|---|
| 106 | lddpipe = subprocess.Popen(['ldd', binary], stdout=subprocess.PIPE).stdout
|
|---|
| 107 | for line in lddpipe:
|
|---|
| 108 | line = line.strip()
|
|---|
| 109 | cols = line.split(" ")
|
|---|
| 110 | if len(cols) < 3 or cols[1] != "=>":
|
|---|
| 111 | continue
|
|---|
| 112 | if cols[0].startswith("libc."):
|
|---|
| 113 | # save this one too
|
|---|
| 114 | bld.env.libc_path = cols[2]
|
|---|
| 115 | if cols[0].startswith(libname):
|
|---|
| 116 | ret = cols[2]
|
|---|
| 117 | bld.env.syslib_paths[libname] = ret
|
|---|
| 118 | return ret
|
|---|
| 119 |
|
|---|
| 120 |
|
|---|
| 121 | # some regular expressions for parsing readelf output
|
|---|
| 122 | re_sharedlib = re.compile('Shared library: \[(.*)\]')
|
|---|
| 123 | re_rpath = re.compile('Library rpath: \[(.*)\]')
|
|---|
| 124 |
|
|---|
| 125 | def get_libs(bld, binname):
|
|---|
| 126 | '''find the list of linked libraries for any binary or library
|
|---|
| 127 | binname is the path to the binary/library on disk
|
|---|
| 128 |
|
|---|
| 129 | We do this using readelf instead of ldd as we need to avoid recursing
|
|---|
| 130 | into system libraries
|
|---|
| 131 | '''
|
|---|
| 132 |
|
|---|
| 133 | # see if we can get the result from the ldd cache
|
|---|
| 134 | if not bld.env.lib_cache:
|
|---|
| 135 | bld.env.lib_cache = {}
|
|---|
| 136 | if binname in bld.env.lib_cache:
|
|---|
| 137 | return bld.env.lib_cache[binname].copy()
|
|---|
| 138 |
|
|---|
| 139 | rpath = []
|
|---|
| 140 | libs = set()
|
|---|
| 141 |
|
|---|
| 142 | elfpipe = subprocess.Popen(['readelf', '--dynamic', binname], stdout=subprocess.PIPE).stdout
|
|---|
| 143 | for line in elfpipe:
|
|---|
| 144 | m = re_sharedlib.search(line)
|
|---|
| 145 | if m:
|
|---|
| 146 | libs.add(m.group(1))
|
|---|
| 147 | m = re_rpath.search(line)
|
|---|
| 148 | if m:
|
|---|
| 149 | rpath.extend(m.group(1).split(":"))
|
|---|
| 150 |
|
|---|
| 151 | ret = set()
|
|---|
| 152 | for lib in libs:
|
|---|
| 153 | found = False
|
|---|
| 154 | for r in rpath:
|
|---|
| 155 | path = os.path.join(r, lib)
|
|---|
| 156 | if os.path.exists(path):
|
|---|
| 157 | ret.add(os.path.realpath(path))
|
|---|
| 158 | found = True
|
|---|
| 159 | break
|
|---|
| 160 | if not found:
|
|---|
| 161 | # we didn't find this lib using rpath. It is probably a system
|
|---|
| 162 | # library, so to find the path to it we either need to use ldd
|
|---|
| 163 | # or we need to start parsing /etc/ld.so.conf* ourselves. We'll
|
|---|
| 164 | # use ldd for now, even though it is slow
|
|---|
| 165 | path = find_ldd_path(bld, lib, binname)
|
|---|
| 166 | if path:
|
|---|
| 167 | ret.add(os.path.realpath(path))
|
|---|
| 168 |
|
|---|
| 169 | bld.env.lib_cache[binname] = ret.copy()
|
|---|
| 170 |
|
|---|
| 171 | return ret
|
|---|
| 172 |
|
|---|
| 173 |
|
|---|
| 174 | def get_libs_recursive(bld, binname, seen):
|
|---|
| 175 | '''find the recursive list of linked libraries for any binary or library
|
|---|
| 176 | binname is the path to the binary/library on disk. seen is a set used
|
|---|
| 177 | to prevent loops
|
|---|
| 178 | '''
|
|---|
| 179 | if binname in seen:
|
|---|
| 180 | return set()
|
|---|
| 181 | ret = get_libs(bld, binname)
|
|---|
| 182 | seen.add(binname)
|
|---|
| 183 | for lib in ret:
|
|---|
| 184 | # we don't want to recurse into system libraries. If a system
|
|---|
| 185 | # library that we use (eg. libcups) happens to use another library
|
|---|
| 186 | # (such as libkrb5) which contains common symbols with our own
|
|---|
| 187 | # libraries, then that is not an error
|
|---|
| 188 | if lib in bld.env.library_dict:
|
|---|
| 189 | ret = ret.union(get_libs_recursive(bld, lib, seen))
|
|---|
| 190 | return ret
|
|---|
| 191 |
|
|---|
| 192 |
|
|---|
| 193 |
|
|---|
| 194 | def find_syslib_path(bld, libname, deps):
|
|---|
| 195 | '''find the path to the syslib we will link against'''
|
|---|
| 196 | # the strategy is to use the targets that depend on the library, and run ldd
|
|---|
| 197 | # on it to find the real location of the library that is used
|
|---|
| 198 |
|
|---|
| 199 | linkpath = deps[0].link_task.outputs[0].abspath(bld.env)
|
|---|
| 200 |
|
|---|
| 201 | if libname == "python":
|
|---|
| 202 | libname += bld.env.PYTHON_VERSION
|
|---|
| 203 |
|
|---|
| 204 | return find_ldd_path(bld, "lib%s" % libname.lower(), linkpath)
|
|---|
| 205 |
|
|---|
| 206 |
|
|---|
| 207 | def build_symbol_sets(bld, tgt_list):
|
|---|
| 208 | '''build the public_symbols and undefined_symbols attributes for each target'''
|
|---|
| 209 |
|
|---|
| 210 | if bld.env.public_symbols:
|
|---|
| 211 | return
|
|---|
| 212 |
|
|---|
| 213 | objlist = [] # list of object file
|
|---|
| 214 | objmap = {} # map from object filename to target (subsystem) name
|
|---|
| 215 |
|
|---|
| 216 | for t in tgt_list:
|
|---|
| 217 | t.public_symbols = set()
|
|---|
| 218 | t.undefined_symbols = set()
|
|---|
| 219 | t.used_symbols = set()
|
|---|
| 220 | for tsk in getattr(t, 'compiled_tasks', []):
|
|---|
| 221 | for output in tsk.outputs:
|
|---|
| 222 | objpath = output.abspath(bld.env)
|
|---|
| 223 | objlist.append(objpath)
|
|---|
| 224 | objmap[objpath] = t
|
|---|
| 225 |
|
|---|
| 226 | symbols = symbols_extract(bld, objlist)
|
|---|
| 227 | for obj in objlist:
|
|---|
| 228 | t = objmap[obj]
|
|---|
| 229 | t.public_symbols = t.public_symbols.union(symbols[obj]["PUBLIC"])
|
|---|
| 230 | t.undefined_symbols = t.undefined_symbols.union(symbols[obj]["UNDEFINED"])
|
|---|
| 231 | t.used_symbols = t.used_symbols.union(symbols[obj]["UNDEFINED"])
|
|---|
| 232 |
|
|---|
| 233 | t.undefined_symbols = t.undefined_symbols.difference(t.public_symbols)
|
|---|
| 234 |
|
|---|
| 235 | # and the reverse map of public symbols to subsystem name
|
|---|
| 236 | bld.env.symbol_map = {}
|
|---|
| 237 |
|
|---|
| 238 | for t in tgt_list:
|
|---|
| 239 | for s in t.public_symbols:
|
|---|
| 240 | if not s in bld.env.symbol_map:
|
|---|
| 241 | bld.env.symbol_map[s] = []
|
|---|
| 242 | bld.env.symbol_map[s].append(real_name(t.sname))
|
|---|
| 243 |
|
|---|
| 244 | targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
|
|---|
| 245 |
|
|---|
| 246 | bld.env.public_symbols = {}
|
|---|
| 247 | for t in tgt_list:
|
|---|
| 248 | name = real_name(t.sname)
|
|---|
| 249 | if name in bld.env.public_symbols:
|
|---|
| 250 | bld.env.public_symbols[name] = bld.env.public_symbols[name].union(t.public_symbols)
|
|---|
| 251 | else:
|
|---|
| 252 | bld.env.public_symbols[name] = t.public_symbols
|
|---|
| 253 | if t.samba_type == 'LIBRARY':
|
|---|
| 254 | for dep in t.add_objects:
|
|---|
| 255 | t2 = bld.get_tgen_by_name(dep)
|
|---|
| 256 | bld.ASSERT(t2 is not None, "Library '%s' has unknown dependency '%s'" % (name, dep))
|
|---|
| 257 | bld.env.public_symbols[name] = bld.env.public_symbols[name].union(t2.public_symbols)
|
|---|
| 258 |
|
|---|
| 259 | bld.env.used_symbols = {}
|
|---|
| 260 | for t in tgt_list:
|
|---|
| 261 | name = real_name(t.sname)
|
|---|
| 262 | if name in bld.env.used_symbols:
|
|---|
| 263 | bld.env.used_symbols[name] = bld.env.used_symbols[name].union(t.used_symbols)
|
|---|
| 264 | else:
|
|---|
| 265 | bld.env.used_symbols[name] = t.used_symbols
|
|---|
| 266 | if t.samba_type == 'LIBRARY':
|
|---|
| 267 | for dep in t.add_objects:
|
|---|
| 268 | t2 = bld.get_tgen_by_name(dep)
|
|---|
| 269 | bld.ASSERT(t2 is not None, "Library '%s' has unknown dependency '%s'" % (name, dep))
|
|---|
| 270 | bld.env.used_symbols[name] = bld.env.used_symbols[name].union(t2.used_symbols)
|
|---|
| 271 |
|
|---|
| 272 |
|
|---|
| 273 | def build_library_dict(bld, tgt_list):
|
|---|
| 274 | '''build the library_dict dictionary'''
|
|---|
| 275 |
|
|---|
| 276 | if bld.env.library_dict:
|
|---|
| 277 | return
|
|---|
| 278 |
|
|---|
| 279 | bld.env.library_dict = {}
|
|---|
| 280 |
|
|---|
| 281 | for t in tgt_list:
|
|---|
| 282 | if t.samba_type in [ 'LIBRARY', 'PYTHON' ]:
|
|---|
| 283 | linkpath = os.path.realpath(t.link_task.outputs[0].abspath(bld.env))
|
|---|
| 284 | bld.env.library_dict[linkpath] = t.sname
|
|---|
| 285 |
|
|---|
| 286 |
|
|---|
| 287 | def build_syslib_sets(bld, tgt_list):
|
|---|
| 288 | '''build the public_symbols for all syslibs'''
|
|---|
| 289 |
|
|---|
| 290 | if bld.env.syslib_symbols:
|
|---|
| 291 | return
|
|---|
| 292 |
|
|---|
| 293 | # work out what syslibs we depend on, and what targets those are used in
|
|---|
| 294 | syslibs = {}
|
|---|
| 295 | objmap = {}
|
|---|
| 296 | for t in tgt_list:
|
|---|
| 297 | if getattr(t, 'uselib', []) and t.samba_type in [ 'LIBRARY', 'BINARY', 'PYTHON' ]:
|
|---|
| 298 | for lib in t.uselib:
|
|---|
| 299 | if lib in ['PYEMBED', 'PYEXT']:
|
|---|
| 300 | lib = "python"
|
|---|
| 301 | if not lib in syslibs:
|
|---|
| 302 | syslibs[lib] = []
|
|---|
| 303 | syslibs[lib].append(t)
|
|---|
| 304 |
|
|---|
| 305 | # work out the paths to each syslib
|
|---|
| 306 | syslib_paths = []
|
|---|
| 307 | for lib in syslibs:
|
|---|
| 308 | path = find_syslib_path(bld, lib, syslibs[lib])
|
|---|
| 309 | if path is None:
|
|---|
| 310 | Logs.warn("Unable to find syslib path for %s" % lib)
|
|---|
| 311 | if path is not None:
|
|---|
| 312 | syslib_paths.append(path)
|
|---|
| 313 | objmap[path] = lib.lower()
|
|---|
| 314 |
|
|---|
| 315 | # add in libc
|
|---|
| 316 | syslib_paths.append(bld.env.libc_path)
|
|---|
| 317 | objmap[bld.env.libc_path] = 'c'
|
|---|
| 318 |
|
|---|
| 319 | symbols = symbols_extract(bld, syslib_paths, dynamic=True)
|
|---|
| 320 |
|
|---|
| 321 | # keep a map of syslib names to public symbols
|
|---|
| 322 | bld.env.syslib_symbols = {}
|
|---|
| 323 | for lib in symbols:
|
|---|
| 324 | bld.env.syslib_symbols[lib] = symbols[lib]["PUBLIC"]
|
|---|
| 325 |
|
|---|
| 326 | # add to the map of symbols to dependencies
|
|---|
| 327 | for lib in symbols:
|
|---|
| 328 | for sym in symbols[lib]["PUBLIC"]:
|
|---|
| 329 | if not sym in bld.env.symbol_map:
|
|---|
| 330 | bld.env.symbol_map[sym] = []
|
|---|
| 331 | bld.env.symbol_map[sym].append(objmap[lib])
|
|---|
| 332 |
|
|---|
| 333 | # keep the libc symbols as well, as these are useful for some of the
|
|---|
| 334 | # sanity checks
|
|---|
| 335 | bld.env.libc_symbols = symbols[bld.env.libc_path]["PUBLIC"]
|
|---|
| 336 |
|
|---|
| 337 | # add to the combined map of dependency name to public_symbols
|
|---|
| 338 | for lib in bld.env.syslib_symbols:
|
|---|
| 339 | bld.env.public_symbols[objmap[lib]] = bld.env.syslib_symbols[lib]
|
|---|
| 340 |
|
|---|
| 341 |
|
|---|
| 342 | def build_autodeps(bld, t):
|
|---|
| 343 | '''build the set of dependencies for a target'''
|
|---|
| 344 | deps = set()
|
|---|
| 345 | name = real_name(t.sname)
|
|---|
| 346 |
|
|---|
| 347 | targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
|
|---|
| 348 |
|
|---|
| 349 | for sym in t.undefined_symbols:
|
|---|
| 350 | if sym in t.public_symbols:
|
|---|
| 351 | continue
|
|---|
| 352 | if sym in bld.env.symbol_map:
|
|---|
| 353 | depname = bld.env.symbol_map[sym]
|
|---|
| 354 | if depname == [ name ]:
|
|---|
| 355 | # self dependencies aren't interesting
|
|---|
| 356 | continue
|
|---|
| 357 | if t.in_library == depname:
|
|---|
| 358 | # no need to depend on the library we are part of
|
|---|
| 359 | continue
|
|---|
| 360 | if depname[0] in ['c', 'python']:
|
|---|
| 361 | # these don't go into autodeps
|
|---|
| 362 | continue
|
|---|
| 363 | if targets[depname[0]] in [ 'SYSLIB' ]:
|
|---|
| 364 | deps.add(depname[0])
|
|---|
| 365 | continue
|
|---|
| 366 | t2 = bld.get_tgen_by_name(depname[0])
|
|---|
| 367 | if len(t2.in_library) != 1:
|
|---|
| 368 | deps.add(depname[0])
|
|---|
| 369 | continue
|
|---|
| 370 | if t2.in_library == t.in_library:
|
|---|
| 371 | # if we're part of the same library, we don't need to autodep
|
|---|
| 372 | continue
|
|---|
| 373 | deps.add(t2.in_library[0])
|
|---|
| 374 | t.autodeps = deps
|
|---|
| 375 |
|
|---|
| 376 |
|
|---|
| 377 | def build_library_names(bld, tgt_list):
|
|---|
| 378 | '''add a in_library attribute to all targets that are part of a library'''
|
|---|
| 379 |
|
|---|
| 380 | if bld.env.done_build_library_names:
|
|---|
| 381 | return
|
|---|
| 382 |
|
|---|
| 383 | for t in tgt_list:
|
|---|
| 384 | t.in_library = []
|
|---|
| 385 |
|
|---|
| 386 | for t in tgt_list:
|
|---|
| 387 | if t.samba_type in [ 'LIBRARY' ]:
|
|---|
| 388 | for obj in t.samba_deps_extended:
|
|---|
| 389 | t2 = bld.get_tgen_by_name(obj)
|
|---|
| 390 | if t2 and t2.samba_type in [ 'SUBSYSTEM', 'ASN1' ]:
|
|---|
| 391 | if not t.sname in t2.in_library:
|
|---|
| 392 | t2.in_library.append(t.sname)
|
|---|
| 393 | bld.env.done_build_library_names = True
|
|---|
| 394 |
|
|---|
| 395 |
|
|---|
| 396 | def check_library_deps(bld, t):
|
|---|
| 397 | '''check that all the autodeps that have mutual dependency of this
|
|---|
| 398 | target are in the same library as the target'''
|
|---|
| 399 |
|
|---|
| 400 | name = real_name(t.sname)
|
|---|
| 401 |
|
|---|
| 402 | if len(t.in_library) > 1:
|
|---|
| 403 | Logs.warn("WARNING: Target '%s' in multiple libraries: %s" % (t.sname, t.in_library))
|
|---|
| 404 |
|
|---|
| 405 | for dep in t.autodeps:
|
|---|
| 406 | t2 = bld.get_tgen_by_name(dep)
|
|---|
| 407 | if t2 is None:
|
|---|
| 408 | continue
|
|---|
| 409 | for dep2 in t2.autodeps:
|
|---|
| 410 | if dep2 == name and t.in_library != t2.in_library:
|
|---|
| 411 | Logs.warn("WARNING: mutual dependency %s <=> %s" % (name, real_name(t2.sname)))
|
|---|
| 412 | Logs.warn("Libraries should match. %s != %s" % (t.in_library, t2.in_library))
|
|---|
| 413 | # raise Utils.WafError("illegal mutual dependency")
|
|---|
| 414 |
|
|---|
| 415 |
|
|---|
| 416 | def check_syslib_collisions(bld, tgt_list):
|
|---|
| 417 | '''check if a target has any symbol collisions with a syslib
|
|---|
| 418 |
|
|---|
| 419 | We do not want any code in Samba to use a symbol name from a
|
|---|
| 420 | system library. The chance of that causing problems is just too
|
|---|
| 421 | high. Note that libreplace uses a rep_XX approach of renaming
|
|---|
| 422 | symbols via macros
|
|---|
| 423 | '''
|
|---|
| 424 |
|
|---|
| 425 | has_error = False
|
|---|
| 426 | for t in tgt_list:
|
|---|
| 427 | for lib in bld.env.syslib_symbols:
|
|---|
| 428 | common = t.public_symbols.intersection(bld.env.syslib_symbols[lib])
|
|---|
| 429 | if common:
|
|---|
| 430 | Logs.error("ERROR: Target '%s' has symbols '%s' which is also in syslib '%s'" % (t.sname, common, lib))
|
|---|
| 431 | has_error = True
|
|---|
| 432 | if has_error:
|
|---|
| 433 | raise Utils.WafError("symbols in common with system libraries")
|
|---|
| 434 |
|
|---|
| 435 |
|
|---|
| 436 | def check_dependencies(bld, t):
|
|---|
| 437 | '''check for depenencies that should be changed'''
|
|---|
| 438 |
|
|---|
| 439 | if bld.get_tgen_by_name(t.sname + ".objlist"):
|
|---|
| 440 | return
|
|---|
| 441 |
|
|---|
| 442 | targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
|
|---|
| 443 |
|
|---|
| 444 | remaining = t.undefined_symbols.copy()
|
|---|
| 445 | remaining = remaining.difference(t.public_symbols)
|
|---|
| 446 |
|
|---|
| 447 | sname = real_name(t.sname)
|
|---|
| 448 |
|
|---|
| 449 | deps = set(t.samba_deps)
|
|---|
| 450 | for d in t.samba_deps:
|
|---|
| 451 | if targets[d] in [ 'EMPTY', 'DISABLED', 'SYSLIB', 'GENERATOR' ]:
|
|---|
| 452 | continue
|
|---|
| 453 | bld.ASSERT(d in bld.env.public_symbols, "Failed to find symbol list for dependency '%s'" % d)
|
|---|
| 454 | diff = remaining.intersection(bld.env.public_symbols[d])
|
|---|
| 455 | if not diff and targets[sname] != 'LIBRARY':
|
|---|
| 456 | Logs.info("Target '%s' has no dependency on %s" % (sname, d))
|
|---|
| 457 | else:
|
|---|
| 458 | remaining = remaining.difference(diff)
|
|---|
| 459 |
|
|---|
| 460 | t.unsatisfied_symbols = set()
|
|---|
| 461 | needed = {}
|
|---|
| 462 | for sym in remaining:
|
|---|
| 463 | if sym in bld.env.symbol_map:
|
|---|
| 464 | dep = bld.env.symbol_map[sym]
|
|---|
| 465 | if not dep[0] in needed:
|
|---|
| 466 | needed[dep[0]] = set()
|
|---|
| 467 | needed[dep[0]].add(sym)
|
|---|
| 468 | else:
|
|---|
| 469 | t.unsatisfied_symbols.add(sym)
|
|---|
| 470 |
|
|---|
| 471 | for dep in needed:
|
|---|
| 472 | Logs.info("Target '%s' should add dep '%s' for symbols %s" % (sname, dep, " ".join(needed[dep])))
|
|---|
| 473 |
|
|---|
| 474 |
|
|---|
| 475 |
|
|---|
| 476 | def check_syslib_dependencies(bld, t):
|
|---|
| 477 | '''check for syslib depenencies'''
|
|---|
| 478 |
|
|---|
| 479 | if bld.get_tgen_by_name(t.sname + ".objlist"):
|
|---|
| 480 | return
|
|---|
| 481 |
|
|---|
| 482 | sname = real_name(t.sname)
|
|---|
| 483 |
|
|---|
| 484 | remaining = set()
|
|---|
| 485 |
|
|---|
| 486 | features = TO_LIST(t.features)
|
|---|
| 487 | if 'pyembed' in features or 'pyext' in features:
|
|---|
| 488 | if 'python' in bld.env.public_symbols:
|
|---|
| 489 | t.unsatisfied_symbols = t.unsatisfied_symbols.difference(bld.env.public_symbols['python'])
|
|---|
| 490 |
|
|---|
| 491 | needed = {}
|
|---|
| 492 | for sym in t.unsatisfied_symbols:
|
|---|
| 493 | if sym in bld.env.symbol_map:
|
|---|
| 494 | dep = bld.env.symbol_map[sym][0]
|
|---|
| 495 | if dep == 'c':
|
|---|
| 496 | continue
|
|---|
| 497 | if not dep in needed:
|
|---|
| 498 | needed[dep] = set()
|
|---|
| 499 | needed[dep].add(sym)
|
|---|
| 500 | else:
|
|---|
| 501 | remaining.add(sym)
|
|---|
| 502 |
|
|---|
| 503 | for dep in needed:
|
|---|
| 504 | Logs.info("Target '%s' should add syslib dep '%s' for symbols %s" % (sname, dep, " ".join(needed[dep])))
|
|---|
| 505 |
|
|---|
| 506 | if remaining:
|
|---|
| 507 | debug("deps: Target '%s' has unsatisfied symbols: %s" % (sname, " ".join(remaining)))
|
|---|
| 508 |
|
|---|
| 509 |
|
|---|
| 510 |
|
|---|
| 511 | def symbols_symbolcheck(task):
|
|---|
| 512 | '''check the internal dependency lists'''
|
|---|
| 513 | bld = task.env.bld
|
|---|
| 514 | tgt_list = get_tgt_list(bld)
|
|---|
| 515 |
|
|---|
| 516 | build_symbol_sets(bld, tgt_list)
|
|---|
| 517 | build_library_names(bld, tgt_list)
|
|---|
| 518 |
|
|---|
| 519 | for t in tgt_list:
|
|---|
| 520 | t.autodeps = set()
|
|---|
| 521 | if getattr(t, 'source', ''):
|
|---|
| 522 | build_autodeps(bld, t)
|
|---|
| 523 |
|
|---|
| 524 | for t in tgt_list:
|
|---|
| 525 | check_dependencies(bld, t)
|
|---|
| 526 |
|
|---|
| 527 | for t in tgt_list:
|
|---|
| 528 | check_library_deps(bld, t)
|
|---|
| 529 |
|
|---|
| 530 | def symbols_syslibcheck(task):
|
|---|
| 531 | '''check the syslib dependencies'''
|
|---|
| 532 | bld = task.env.bld
|
|---|
| 533 | tgt_list = get_tgt_list(bld)
|
|---|
| 534 |
|
|---|
| 535 | build_syslib_sets(bld, tgt_list)
|
|---|
| 536 | check_syslib_collisions(bld, tgt_list)
|
|---|
| 537 |
|
|---|
| 538 | for t in tgt_list:
|
|---|
| 539 | check_syslib_dependencies(bld, t)
|
|---|
| 540 |
|
|---|
| 541 |
|
|---|
| 542 | def symbols_whyneeded(task):
|
|---|
| 543 | """check why 'target' needs to link to 'subsystem'"""
|
|---|
| 544 | bld = task.env.bld
|
|---|
| 545 | tgt_list = get_tgt_list(bld)
|
|---|
| 546 |
|
|---|
| 547 | why = Options.options.WHYNEEDED.split(":")
|
|---|
| 548 | if len(why) != 2:
|
|---|
| 549 | raise Utils.WafError("usage: WHYNEEDED=TARGET:DEPENDENCY")
|
|---|
| 550 | target = why[0]
|
|---|
| 551 | subsystem = why[1]
|
|---|
| 552 |
|
|---|
| 553 | build_symbol_sets(bld, tgt_list)
|
|---|
| 554 | build_library_names(bld, tgt_list)
|
|---|
| 555 | build_syslib_sets(bld, tgt_list)
|
|---|
| 556 |
|
|---|
| 557 | Logs.info("Checking why %s needs to link to %s" % (target, subsystem))
|
|---|
| 558 | if not target in bld.env.used_symbols:
|
|---|
| 559 | Logs.warn("unable to find target '%s' in used_symbols dict" % target)
|
|---|
| 560 | return
|
|---|
| 561 | if not subsystem in bld.env.public_symbols:
|
|---|
| 562 | Logs.warn("unable to find subsystem '%s' in public_symbols dict" % subsystem)
|
|---|
| 563 | return
|
|---|
| 564 | overlap = bld.env.used_symbols[target].intersection(bld.env.public_symbols[subsystem])
|
|---|
| 565 | if not overlap:
|
|---|
| 566 | Logs.info("target '%s' doesn't use any public symbols from '%s'" % (target, subsystem))
|
|---|
| 567 | else:
|
|---|
| 568 | Logs.info("target '%s' uses symbols %s from '%s'" % (target, overlap, subsystem))
|
|---|
| 569 |
|
|---|
| 570 |
|
|---|
| 571 | def report_duplicate(bld, binname, sym, libs, fail_on_error):
|
|---|
| 572 | '''report duplicated symbols'''
|
|---|
| 573 | if sym in ['_init', '_fini', '_edata', '_end', '__bss_start']:
|
|---|
| 574 | return
|
|---|
| 575 | libnames = []
|
|---|
| 576 | for lib in libs:
|
|---|
| 577 | if lib in bld.env.library_dict:
|
|---|
| 578 | libnames.append(bld.env.library_dict[lib])
|
|---|
| 579 | else:
|
|---|
| 580 | libnames.append(lib)
|
|---|
| 581 | if fail_on_error:
|
|---|
| 582 | raise Utils.WafError("%s: Symbol %s linked in multiple libraries %s" % (binname, sym, libnames))
|
|---|
| 583 | else:
|
|---|
| 584 | print("%s: Symbol %s linked in multiple libraries %s" % (binname, sym, libnames))
|
|---|
| 585 |
|
|---|
| 586 |
|
|---|
| 587 | def symbols_dupcheck_binary(bld, binname, fail_on_error):
|
|---|
| 588 | '''check for duplicated symbols in one binary'''
|
|---|
| 589 |
|
|---|
| 590 | libs = get_libs_recursive(bld, binname, set())
|
|---|
| 591 | symlist = symbols_extract(bld, libs, dynamic=True)
|
|---|
| 592 |
|
|---|
| 593 | symmap = {}
|
|---|
| 594 | for libpath in symlist:
|
|---|
| 595 | for sym in symlist[libpath]['PUBLIC']:
|
|---|
| 596 | if sym == '_GLOBAL_OFFSET_TABLE_':
|
|---|
| 597 | continue
|
|---|
| 598 | if not sym in symmap:
|
|---|
| 599 | symmap[sym] = set()
|
|---|
| 600 | symmap[sym].add(libpath)
|
|---|
| 601 | for sym in symmap:
|
|---|
| 602 | if len(symmap[sym]) > 1:
|
|---|
| 603 | for libpath in symmap[sym]:
|
|---|
| 604 | if libpath in bld.env.library_dict:
|
|---|
| 605 | report_duplicate(bld, binname, sym, symmap[sym], fail_on_error)
|
|---|
| 606 | break
|
|---|
| 607 |
|
|---|
| 608 | def symbols_dupcheck(task, fail_on_error=False):
|
|---|
| 609 | '''check for symbols defined in two different subsystems'''
|
|---|
| 610 | bld = task.env.bld
|
|---|
| 611 | tgt_list = get_tgt_list(bld)
|
|---|
| 612 |
|
|---|
| 613 | targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
|
|---|
| 614 |
|
|---|
| 615 | build_library_dict(bld, tgt_list)
|
|---|
| 616 | for t in tgt_list:
|
|---|
| 617 | if t.samba_type == 'BINARY':
|
|---|
| 618 | binname = os_path_relpath(t.link_task.outputs[0].abspath(bld.env), os.getcwd())
|
|---|
| 619 | symbols_dupcheck_binary(bld, binname, fail_on_error)
|
|---|
| 620 |
|
|---|
| 621 |
|
|---|
| 622 | def symbols_dupcheck_fatal(task):
|
|---|
| 623 | '''check for symbols defined in two different subsystems (and fail if duplicates are found)'''
|
|---|
| 624 | symbols_dupcheck(task, fail_on_error=True)
|
|---|
| 625 |
|
|---|
| 626 |
|
|---|
| 627 | def SYMBOL_CHECK(bld):
|
|---|
| 628 | '''check our dependency lists'''
|
|---|
| 629 | if Options.options.SYMBOLCHECK:
|
|---|
| 630 | bld.SET_BUILD_GROUP('symbolcheck')
|
|---|
| 631 | task = bld(rule=symbols_symbolcheck, always=True, name='symbol checking')
|
|---|
| 632 | task.env.bld = bld
|
|---|
| 633 |
|
|---|
| 634 | bld.SET_BUILD_GROUP('syslibcheck')
|
|---|
| 635 | task = bld(rule=symbols_syslibcheck, always=True, name='syslib checking')
|
|---|
| 636 | task.env.bld = bld
|
|---|
| 637 |
|
|---|
| 638 | bld.SET_BUILD_GROUP('syslibcheck')
|
|---|
| 639 | task = bld(rule=symbols_dupcheck, always=True, name='symbol duplicate checking')
|
|---|
| 640 | task.env.bld = bld
|
|---|
| 641 |
|
|---|
| 642 | if Options.options.WHYNEEDED:
|
|---|
| 643 | bld.SET_BUILD_GROUP('syslibcheck')
|
|---|
| 644 | task = bld(rule=symbols_whyneeded, always=True, name='check why a dependency is needed')
|
|---|
| 645 | task.env.bld = bld
|
|---|
| 646 |
|
|---|
| 647 |
|
|---|
| 648 | Build.BuildContext.SYMBOL_CHECK = SYMBOL_CHECK
|
|---|
| 649 |
|
|---|
| 650 | def DUP_SYMBOL_CHECK(bld):
|
|---|
| 651 | if Options.options.DUP_SYMBOLCHECK and bld.env.DEVELOPER:
|
|---|
| 652 | '''check for duplicate symbols'''
|
|---|
| 653 | bld.SET_BUILD_GROUP('syslibcheck')
|
|---|
| 654 | task = bld(rule=symbols_dupcheck_fatal, always=True, name='symbol duplicate checking')
|
|---|
| 655 | task.env.bld = bld
|
|---|
| 656 |
|
|---|
| 657 | Build.BuildContext.DUP_SYMBOL_CHECK = DUP_SYMBOL_CHECK
|
|---|
