GeezerVisonThe World Wide Web, restored to 800 pixels of glory. |
| Home|About|Gaming cabinet|Archives|How it works|Starter sites |
GeezerVison is showing github.com — cpython/Objects/moduleobject.c at main · python/cpython Expand file tree/ Copy pathmoduleobject.cMore file actions 1833 lines (1681 loc) · 54.7 KB / Copy pathmoduleobject.cFile metadata and controls1833 lines (1681 loc) · 54.7 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* Module object implementation */ #include "Python.h" #include "pycore_call.h" // _PyObject_CallNoArgs() #include "pycore_ceval.h" // _PyEval_EnableGILTransient() #include "pycore_dict.h" // _PyDict_EnablePerThreadRefcounting() #include "pycore_fileutils.h" // _Py_wgetcwd #include "pycore_import.h" // _PyImport_GetNextModuleIndex() #include "pycore_interp.h" // PyInterpreterState.importlib #include "pycore_lazyimportobject.h" // PyLazyImport_CheckExact() #include "pycore_long.h" // _PyLong_GetOne() #include "pycore_modsupport.h" // _PyModule_CreateInitialized() #include "pycore_moduleobject.h" // _PyModule_GetDefOrNull() #include "pycore_object.h" // _PyType_AllocNoTrack #include "pycore_pyerrors.h" // _PyErr_FormatFromCause() #include "pycore_pystate.h" // _PyInterpreterState_GET() #include "pycore_slots.h" // _PySlotIterator_Init #include "pycore_unicodeobject.h" // _PyUnicode_EqualToASCIIString() #include "pycore_weakref.h" // FT_CLEAR_WEAKREFS() #include "osdefs.h" // MAXPATHLEN #define _PyModule_CAST(op) \ (assert(PyModule_Check(op)), _Py_CAST(PyModuleObject*, (op))) static PyMemberDef module_members[] = { {"__dict__", _Py_T_OBJECT, offsetof(PyModuleObject, md_dict), Py_READONLY}, {0} }; static void assert_def_missing_or_redundant(PyModuleObject *m) { /* We copy all relevant info into the module object. * Modules created using a def keep a reference to that (statically * allocated) def; the info there should match what we have in the module. */ #ifndef NDEBUG if (m->md_token_is_def) { PyModuleDef *def = (PyModuleDef *)m->md_token; assert(def); #define DO_ASSERT(F) assert (def->m_ ## F == m->md_state_ ## F); DO_ASSERT(size); DO_ASSERT(traverse); DO_ASSERT(clear); DO_ASSERT(free); #undef DO_ASSERT } #endif // NDEBUG } PyTypeObject PyModuleDef_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "moduledef", /* tp_name */ sizeof(PyModuleDef), /* tp_basicsize */ 0, /* tp_itemsize */ }; int _PyModule_IsExtension(PyObject *obj) { if (!PyModule_Check(obj)) { return 0; } PyModuleObject *module = (PyModuleObject*)obj; if (module->md_exec) { return 1; } if (module->md_token_is_def) { PyModuleDef *def = (PyModuleDef *)module->md_token; return (module->md_token_is_def && def->m_methods != NULL); } return 0; } PyObject* PyModuleDef_Init(PyModuleDef* def) { #ifdef Py_GIL_DISABLED // Check that this def does not come from a non-free-threading ABI. // // This is meant as a "sanity check"; users should never rely on it. // In particular, if we run out of ob_flags bits, or otherwise need to // change some of the internals, this check can go away. Still, it // would be nice to keep it for the free-threading transition. // // A PyModuleDef must be initialized with PyModuleDef_HEAD_INIT, // which (via PyObject_HEAD_INIT) sets _Py_STATICALLY_ALLOCATED_FLAG // and not _Py_LEGACY_ABI_CHECK_FLAG. For PyModuleDef, these flags never // change. // This means that the lower nibble of a valid PyModuleDef's ob_flags is // always `_10_` (in binary; `_` is don't care). // // So, a check for these bits won't reject valid PyModuleDef. // Rejecting incompatible extensions is slightly less important; here's // how that works: // // In the pre-free-threading stable ABI, PyModuleDef_HEAD_INIT is big // enough to overlap with free-threading ABI's ob_flags, is all zeros // except for the refcount field. // The refcount field can be: // - 1 (3.11 and below) // - UINT_MAX >> 2 (32-bit 3.12 & 3.13) // - UINT_MAX (64-bit 3.12 & 3.13) // - 7L << 28 (3.14) // // This means that the lower nibble of *any byte* in PyModuleDef_HEAD_INIT // is not `_10_` -- it can be: // - 0b0000 // - 0b0001 // - 0b0011 (from UINT_MAX >> 2) // - 0b0111 (from 7L << 28) // - 0b1111 (e.g. from UINT_MAX) // (The values may change at runtime as the PyModuleDef is used, but // PyModuleDef_Init is required before using the def as a Python object, // so we check at least once with the initial values. uint16_t flags = ((PyObject*)def)->ob_flags; uint16_t bits = _Py_STATICALLY_ALLOCATED_FLAG | _Py_LEGACY_ABI_CHECK_FLAG; if ((flags & bits) != _Py_STATICALLY_ALLOCATED_FLAG) { const char *message = "invalid PyModuleDef, extension possibly " "compiled for non-free-threaded Python"; // Write the error as unraisable: if the extension tries calling // any API, it's likely to segfault and lose the exception. PyErr_SetString(PyExc_SystemError, message); PyErr_WriteUnraisable(NULL); // But also raise the exception normally -- this is technically // a recoverable state. PyErr_SetString(PyExc_SystemError, message); return NULL; } #endif assert(PyModuleDef_Type.tp_flags & Py_TPFLAGS_READY); if (def->m_base.m_index == 0) { Py_SET_REFCNT(def, 1); Py_SET_TYPE(def, &PyModuleDef_Type); def->m_base.m_index = _PyImport_GetNextModuleIndex(); } return (PyObject*)def; } static int module_init_dict(PyModuleObject *mod, PyObject *md_dict, PyObject *name, PyObject *doc) { assert(md_dict != NULL); if (doc == NULL) doc = Py_None; if (PyDict_SetItem(md_dict, &_Py_ID(__name__), name) != 0) return -1; if (PyDict_SetItem(md_dict, &_Py_ID(__doc__), doc) != 0) return -1; if (PyDict_SetItem(md_dict, &_Py_ID(__package__), Py_None) != 0) return -1; if (PyDict_SetItem(md_dict, &_Py_ID(__loader__), Py_None) != 0) return -1; if (PyDict_SetItem(md_dict, &_Py_ID(__spec__), Py_None) != 0) return -1; if (PyUnicode_CheckExact(name)) { Py_XSETREF(mod->md_name, Py_NewRef(name)); } return 0; } static PyModuleObject * new_module_notrack(PyTypeObject *mt) { PyModuleObject *m; m = (PyModuleObject *)_PyType_AllocNoTrack(mt, 0); if (m == NULL) return NULL; m->md_state = NULL; m->md_weaklist = NULL; m->md_name = NULL; m->md_token_is_def = false; #ifdef Py_GIL_DISABLED m->md_requires_gil = true; #endif m->md_state_size = 0; m->md_state_traverse = NULL; m->md_state_clear = NULL; m->md_state_free = NULL; m->md_exec = NULL; m->md_token = NULL; m->md_dict = PyDict_New(); if (m->md_dict == NULL) { Py_DECREF(m); return NULL; } return m; } /* Module dict watcher callback. * When a module dictionary is modified, we need to clear the keys version * to invalidate any cached lookups that depend on the dictionary structure. */ static int module_dict_watcher(PyDict_WatchEvent event, PyObject *dict, PyObject *key, PyObject *new_value) { assert(PyDict_Check(dict)); // Only if a new lazy object shows up do we need to clear the dictionary. If // this is adding a new key then the version will be reset anyway. if (event == PyDict_EVENT_MODIFIED && new_value != NULL && PyLazyImport_CheckExact(new_value)) { _PyDict_ClearKeysVersionLockHeld(dict); } return 0; } int _PyModule_InitModuleDictWatcher(PyInterpreterState *interp) { // This is a reserved watcher for CPython so there's no need to check for non-NULL. assert(interp->dict_state.watchers[MODULE_WATCHER_ID] == NULL); interp->dict_state.watchers[MODULE_WATCHER_ID] = &module_dict_watcher; return 0; } static void track_module(PyModuleObject *m) { _PyDict_EnablePerThreadRefcounting(m->md_dict); _PyObject_SetDeferredRefcount((PyObject *)m); PyDict_Watch(MODULE_WATCHER_ID, m->md_dict); PyObject_GC_Track(m); } static PyObject * new_module(PyTypeObject *mt, PyObject *args, PyObject *kws) { PyModuleObject *m = new_module_notrack(mt); if (m != NULL) { track_module(m); } return (PyObject *)m; } PyObject * PyModule_NewObject(PyObject *name) { PyModuleObject *m = new_module_notrack(&PyModule_Type); if (m == NULL) return NULL; if (module_init_dict(m, m->md_dict, name, NULL) != 0) goto fail; track_module(m); return (PyObject *)m; fail: Py_DECREF(m); return NULL; } PyObject * PyModule_New(const char *name) { PyObject *nameobj, *module; nameobj = PyUnicode_FromString(name); if (nameobj == NULL) return NULL; module = PyModule_NewObject(nameobj); Py_DECREF(nameobj); return module; } /* Check API/ABI version * Issues a warning on mismatch, which is usually not fatal. * Returns 0 if an exception is raised. */ static int check_api_version(const char *name, int module_api_version) { if (module_api_version != PYTHON_API_VERSION && module_api_version != PYTHON_ABI_VERSION) { int err; err = PyErr_WarnFormat(PyExc_RuntimeWarning, 1, "Python C API version mismatch for module %.100s: " "This Python has API version %d, module %.100s has version %d.", name, PYTHON_API_VERSION, name, module_api_version); if (err) return 0; } return 1; } static int _add_methods_to_object(PyObject *module, PyObject *name, PyMethodDef *functions) { PyObject *func; PyMethodDef *fdef; for (fdef = functions; fdef->ml_name != NULL; fdef++) { if ((fdef->ml_flags & METH_CLASS) || (fdef->ml_flags & METH_STATIC)) { PyErr_SetString(PyExc_ValueError, "module functions cannot set" " METH_CLASS or METH_STATIC"); return -1; } func = PyCFunction_NewEx(fdef, (PyObject*)module, name); if (func == NULL) { return -1; } _PyObject_SetDeferredRefcount(func); if (PyObject_SetAttrString(module, fdef->ml_name, func) != 0) { Py_DECREF(func); return -1; } Py_DECREF(func); } return 0; } PyObject * PyModule_Create2(PyModuleDef* module, int module_api_version) { if (!_PyImport_IsInitialized(_PyInterpreterState_GET())) { PyErr_SetString(PyExc_SystemError, "Python import machinery not initialized"); return NULL; } return _PyModule_CreateInitialized(module, module_api_version); } static void module_copy_members_from_deflike( PyModuleObject *md, PyModuleDef *def_like /* not necessarily a valid Python object */) { md->md_state_size = def_like->m_size; md->md_state_traverse = def_like->m_traverse; md->md_state_clear = def_like->m_clear; md->md_state_free = def_like->m_free; } PyObject * _PyModule_CreateInitialized(PyModuleDef* module, int module_api_version) { const char* name; PyModuleObject *m; if (!PyModuleDef_Init(module)) return NULL; name = module->m_name; if (!check_api_version(name, module_api_version)) { return NULL; } if (module->m_slots) { PyErr_Format( PyExc_SystemError, "module %s: PyModule_Create is incompatible with m_slots", name); return NULL; } name = _PyImport_ResolveNameWithPackageContext(name); m = (PyModuleObject*)PyModule_New(name); if (m == NULL) return NULL; if (module->m_size > 0) { m->md_state = PyMem_Malloc(module->m_size); if (!m->md_state) { PyErr_NoMemory(); Py_DECREF(m); return NULL; } memset(m->md_state, 0, module->m_size); } if (module->m_methods != NULL) { if (PyModule_AddFunctions((PyObject *) m, module->m_methods) != 0) { Py_DECREF(m); return NULL; } } if (module->m_doc != NULL) { if (PyModule_SetDocString((PyObject *) m, module->m_doc) != 0) { Py_DECREF(m); return NULL; } } m->md_token = module; m->md_token_is_def = true; module_copy_members_from_deflike(m, module); #ifdef Py_GIL_DISABLED m->md_requires_gil = true; #endif return (PyObject*)m; } typedef PyObject *(*createfunc_t)(PyObject *, PyModuleDef*); static PyObject * module_from_slots_and_spec( const PySlot *slots, PyObject *spec, int module_api_version, PyModuleDef* original_def /* NULL if not defined by a def */) { createfunc_t create = NULL; PyObject *nameobj; PyObject *m = NULL; uint64_t multiple_interpreters = (uint64_t)(uintptr_t)Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED; bool requires_gil = true; const char *name; int ret; void *token = NULL; _Py_modexecfunc m_exec = NULL; PyInterpreterState *interp = _PyInterpreterState_GET(); nameobj = PyObject_GetAttrString(spec, "name"); if (nameobj == NULL) { return NULL; } name = PyUnicode_AsUTF8(nameobj); if (name == NULL) { goto error; } if (!check_api_version(name, module_api_version)) { goto error; } _PySlotIterator it; PyModuleDef _dummy_def = {0}; PyModuleDef *def_like; if (slots) { assert(!original_def); def_like = &_dummy_def; _PySlotIterator_Init(&it, slots, _PySlot_KIND_MOD); } else { assert(original_def); def_like = original_def; _PySlotIterator_InitLegacy(&it, def_like->m_slots, _PySlot_KIND_MOD); } it.name = name; while (_PySlotIterator_Next(&it)) { switch (it.current.sl_id) { case Py_slot_invalid: goto error; case Py_mod_create: create = (createfunc_t)it.current.sl_func; break; case Py_mod_exec: if (!original_def) { if (m_exec) { PyErr_Format( PyExc_SystemError, "module %s has multiple Py_mod_exec slots", name); goto error; } m_exec = (_Py_modexecfunc)it.current.sl_func; } break; case Py_mod_multiple_interpreters: multiple_interpreters = it.current.sl_uint64; break; case Py_mod_gil: { uint64_t val = it.current.sl_uint64; requires_gil = (val != (uint64_t)(uintptr_t)Py_MOD_GIL_NOT_USED); } break; case Py_mod_abi: if (PyABIInfo_Check(it.current.sl_ptr, name) < 0) { goto error; } break; case Py_mod_token: if (original_def && original_def != it.current.sl_ptr) { PyErr_Format( PyExc_SystemError, "module %s: arbitrary Py_mod_token not " "allowed with PyModuleDef", name); goto error; } token = it.current.sl_ptr; break; // Common case: Copy a PEP 793 slot to def_like #define DEF_SLOT_CASE(SLOT, TYPE, SL_MEMBER, MEMBER) \ case SLOT: \ do { \ if (original_def) { \ TYPE orig_value = (TYPE)original_def->MEMBER; \ TYPE new_value = (TYPE)it.current.SL_MEMBER; \ if (orig_value != new_value) { \ PyErr_Format( \ PyExc_SystemError, \ "module %s: %s conflicts with " \ "PyModuleDef." #MEMBER, \ name, _PySlot_GetName(it.current.sl_id)); \ goto error; \ } \ } \ (def_like->MEMBER) = (TYPE)it.current.SL_MEMBER; \ } while (0); \ break; \ ///////////////////////////////////////////////////////////////// DEF_SLOT_CASE(Py_mod_name, char*, sl_ptr, m_name) DEF_SLOT_CASE(Py_mod_doc, char*, sl_ptr, m_doc) DEF_SLOT_CASE(Py_mod_state_size, Py_ssize_t, sl_size, m_size) DEF_SLOT_CASE(Py_mod_methods, PyMethodDef*, sl_ptr, m_methods) DEF_SLOT_CASE(Py_mod_state_traverse, traverseproc, sl_func, m_traverse) DEF_SLOT_CASE(Py_mod_state_clear, inquiry, sl_func, m_clear) DEF_SLOT_CASE(Py_mod_state_free, freefunc, sl_func, m_free) #undef DEF_SLOT_CASE } } if (!original_def && !_PySlotIterator_SawSlot(&it, Py_mod_abi)) { PyErr_Format( PyExc_SystemError, "module %s does not define Py_mod_abi," " which is mandatory for modules defined from slots only.", name); goto error; } #ifdef Py_GIL_DISABLED // For modules created directly from slots (not from a def), we enable // the GIL here (pairing `_PyEval_EnableGILTransient` with // an immediate `_PyImport_EnableGILAndWarn`). // For modules created from a def, the caller is responsible for this. if (!original_def && requires_gil) { PyThreadState *tstate = _PyThreadState_GET(); if (_PyEval_EnableGILTransient(tstate) < 0) { goto error; } if (_PyImport_EnableGILAndWarn(tstate, nameobj) < 0) { goto error; } } #endif if (def_like->m_size < 0) { PyErr_Format( PyExc_SystemError, "module %s: m_size may not be negative for multi-phase initialization", name); goto error; } /* By default, multi-phase init modules are expected to work under multiple interpreters. */ if (multiple_interpreters == (int64_t)(intptr_t)Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED) { if (!_Py_IsMainInterpreter(interp) && _PyImport_CheckSubinterpIncompatibleExtensionAllowed(name) < 0) { goto error; } } else if (multiple_interpreters != (int64_t)(intptr_t)Py_MOD_PER_INTERPRETER_GIL_SUPPORTED && interp->ceval.own_gil && !_Py_IsMainInterpreter(interp) && _PyImport_CheckSubinterpIncompatibleExtensionAllowed(name) < 0) { goto error; } if (create) { m = create(spec, original_def); if (m == NULL) { if (!PyErr_Occurred()) { PyErr_Format( PyExc_SystemError, "creation of module %s failed without setting an exception", name); } goto error; } else { if (PyErr_Occurred()) { _PyErr_FormatFromCause( PyExc_SystemError, "creation of module %s raised unreported exception", name); goto error; } } } else { m = PyModule_NewObject(nameobj); if (m == NULL) { goto error; } } if (PyModule_Check(m)) { PyModuleObject *mod = (PyModuleObject*)m; mod->md_state = NULL; module_copy_members_from_deflike(mod, def_like); if (original_def) { assert (!token || token == original_def); mod->md_token = original_def; mod->md_token_is_def = 1; } else { mod->md_token = token; } #ifdef Py_GIL_DISABLED mod->md_requires_gil = requires_gil; #else (void)requires_gil; #endif mod->md_exec = m_exec; } else { if (def_like->m_size > 0 || def_like->m_traverse || def_like->m_clear || def_like->m_free) { PyErr_Format( PyExc_SystemError, "module %s is not a module object, but requests module state", name); goto error; } if (_PySlotIterator_SawSlot(&it, Py_mod_exec)) { PyErr_Format( PyExc_SystemError, "module %s specifies execution slots, but did not create " "a ModuleType instance", name); goto error; } if (token) { PyErr_Format( PyExc_SystemError, "module %s specifies a token, but did not create " "a ModuleType instance", name); goto error; } } if (def_like->m_methods != NULL) { ret = _add_methods_to_object(m, nameobj, def_like->m_methods); if (ret != 0) { goto error; } } if (def_like->m_doc != NULL) { ret = PyModule_SetDocString(m, def_like->m_doc); if (ret != 0) { goto error; } } Py_DECREF(nameobj); return m; error: Py_DECREF(nameobj); Py_XDECREF(m); return NULL; } PyObject * PyModule_FromDefAndSpec2(PyModuleDef* def, PyObject *spec, int module_api_version) { PyModuleDef_Init(def); return module_from_slots_and_spec(NULL, spec, module_api_version, def); } PyObject * PyModule_FromSlotsAndSpec(const PySlot *slots, PyObject *spec) { if (!slots) { PyErr_SetString( PyExc_SystemError, "PyModule_FromSlotsAndSpec called with NULL slots"); return NULL; } return module_from_slots_and_spec(slots, spec, PYTHON_API_VERSION, NULL); } #ifdef Py_GIL_DISABLED int PyUnstable_Module_SetGIL(PyObject *module, void *gil) { bool requires_gil = (gil != Py_MOD_GIL_NOT_USED); if (!PyModule_Check(module)) { PyErr_BadInternalCall(); return -1; } ((PyModuleObject *)module)->md_requires_gil = requires_gil; return 0; } #endif static int run_exec_func(PyObject *module, int (*exec)(PyObject *)) { int ret = exec(module); if (ret != 0) { if (!PyErr_Occurred()) { PyErr_Format( PyExc_SystemError, "execution of %R failed without setting an exception", module); } return -1; } if (PyErr_Occurred()) { _PyErr_FormatFromCause( PyExc_SystemError, "execution of module %R raised unreported exception", module); return -1; } return 0; } static int alloc_state(PyObject *module) { if (!PyModule_Check(module)) { PyErr_Format(PyExc_TypeError, "expected module, got %T", module); return -1; } PyModuleObject *md = (PyModuleObject*)module; if (md->md_state_size >= 0) { if (md->md_state == NULL) { /* Always set a state pointer; this serves as a marker to skip * multiple initialization (importlib.reload() is no-op) */ md->md_state = PyMem_Malloc(md->md_state_size); if (!md->md_state) { PyErr_NoMemory(); return -1; } memset(md->md_state, 0, md->md_state_size); } } return 0; } int PyModule_Exec(PyObject *module) { if (alloc_state(module) < 0) { return -1; } PyModuleObject *md = (PyModuleObject*)module; if (md->md_exec) { assert(!md->md_token_is_def); return run_exec_func(module, md->md_exec); } PyModuleDef *def = _PyModule_GetDefOrNull(module); if (def) { return PyModule_ExecDef(module, def); } return 0; } int PyModule_ExecDef(PyObject *module, PyModuleDef *def) { if (alloc_state(module) < 0) { return -1; } assert(PyModule_Check(module)); if (def->m_slots == NULL) { return 0; } _PySlotIterator it; _PySlotIterator_InitLegacy(&it, def->m_slots, _PySlot_KIND_MOD); while (_PySlotIterator_Next(&it)) { _Py_modexecfunc func; switch (it.current.sl_id) { case Py_slot_invalid: return -1; case Py_mod_exec: func = (_Py_modexecfunc)it.current.sl_func; if (run_exec_func(module, func) < 0) { return -1; } break; } } return 0; } int PyModule_AddFunctions(PyObject *m, PyMethodDef *functions) { int res; PyObject *name = PyModule_GetNameObject(m); if (name == NULL) { return -1; } res = _add_methods_to_object(m, name, functions); Py_DECREF(name); return res; } int PyModule_SetDocString(PyObject *m, const char *doc) { PyObject *v; v = PyUnicode_FromString(doc); if (v == NULL || PyObject_SetAttr(m, &_Py_ID(__doc__), v) != 0) { Py_XDECREF(v); return -1; } Py_DECREF(v); return 0; } PyObject * PyModule_GetDict(PyObject *m) { if (!PyModule_Check(m)) { PyErr_BadInternalCall(); return NULL; } return _PyModule_GetDict(m); // borrowed reference } int PyModule_GetStateSize(PyObject *m, Py_ssize_t *size_p) { *size_p = -1; if (!PyModule_Check(m)) { PyErr_Format(PyExc_TypeError, "expected module, got %T", m); return -1; } PyModuleObject *mod = (PyModuleObject *)m; *size_p = mod->md_state_size; return 0; } int PyModule_GetToken_DuringGC(PyObject *m, void **token_p) { *token_p = NULL; if (!PyModule_Check(m)) { return -1; } *token_p = _PyModule_GetToken(m); return 0; } int PyModule_GetToken(PyObject *m, void **token_p) { *token_p = NULL; if (!PyModule_Check(m)) { PyErr_Format(PyExc_TypeError, "expected module, got %T", m); return -1; } *token_p = _PyModule_GetToken(m); return 0; } PyObject* PyModule_GetNameObject(PyObject *mod) { if (!PyModule_Check(mod)) { PyErr_BadArgument(); return NULL; } PyObject *dict = ((PyModuleObject *)mod)->md_dict; // borrowed reference if (dict == NULL || !PyDict_Check(dict)) { goto error; } PyObject *name; if (PyDict_GetItemRef(dict, &_Py_ID(__name__), &name) <= 0) { // error or not found goto error; } if (!PyUnicode_Check(name)) { Py_DECREF(name); goto error; } return name; error: if (!PyErr_Occurred()) { PyErr_SetString(PyExc_SystemError, "nameless module"); } return NULL; } const char * PyModule_GetName(PyObject *m) { PyObject *name = PyModule_GetNameObject(m); if (name == NULL) { return NULL; } assert(Py_REFCNT(name) >= 2); Py_DECREF(name); /* module dict has still a reference */ return PyUnicode_AsUTF8(name); } PyObject* _PyModule_GetFilenameObject(PyObject *mod) { // We return None to indicate "not found" or "bogus". if (!PyModule_Check(mod)) { PyErr_BadArgument(); return NULL; } PyObject *dict = ((PyModuleObject *)mod)->md_dict; // borrowed reference if (dict == NULL) { // The module has been tampered with. Py_RETURN_NONE; } PyObject *fileobj; int res = PyDict_GetItemRef(dict, &_Py_ID(__file__), &fileobj); if (res < 0) { return NULL; } if (res == 0) { // __file__ isn't set. There are several reasons why this might // be so, most of them valid reasons. If it's the __main__ // module then we're running the REPL or with -c. Otherwise // it's a namespace package or other module with a loader that // isn't disk-based. It could also be that a user created // a module manually but without manually setting __file__. Py_RETURN_NONE; } if (!PyUnicode_Check(fileobj)) { Py_DECREF(fileobj); Py_RETURN_NONE; } return fileobj; } PyObject* PyModule_GetFilenameObject(PyObject *mod) { PyObject *fileobj = _PyModule_GetFilenameObject(mod); if (fileobj == NULL) { return NULL; } if (fileobj == Py_None) { PyErr_SetString(PyExc_SystemError, "module filename missing"); return NULL; } return fileobj; } const char * PyModule_GetFilename(PyObject *m) { PyObject *fileobj; const char *utf8; fileobj = PyModule_GetFilenameObject(m); if (fileobj == NULL) return NULL; utf8 = PyUnicode_AsUTF8(fileobj); Py_DECREF(fileobj); /* module dict has still a reference */ return utf8; } Py_ssize_t _PyModule_GetFilenameUTF8(PyObject *mod, char *buffer, Py_ssize_t maxlen) { // We "return" an empty string for an invalid module // and for a missing, empty, or invalid filename. assert(maxlen >= 0); Py_ssize_t size = -1; PyObject *filenameobj = _PyModule_GetFilenameObject(mod); if (filenameobj == NULL) { return -1; } if (filenameobj == Py_None) { // It is missing or invalid. buffer[0] = '\0'; size = 0; } else { const char *filename = PyUnicode_AsUTF8AndSize(filenameobj, &size); if (filename == NULL) { Py_DECREF(filenameobj); return -1; } assert(size >= 0); if (size > maxlen) { |
| You are visitor 01402520 — GeezerVison does not store the pages you look up. Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required. |