| |
| /* Module definition and import implementation */ |
| |
| #include "Python.h" |
| |
| #include "Python-ast.h" |
| #undef Yield /* undefine macro conflicting with winbase.h */ |
| #include "errcode.h" |
| #include "marshal.h" |
| #include "code.h" |
| #include "frameobject.h" |
| #include "osdefs.h" |
| #include "importdl.h" |
| |
| #ifdef HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifdef MS_WINDOWS |
| /* for stat.st_mode */ |
| typedef unsigned short mode_t; |
| /* for _mkdir */ |
| #include <direct.h> |
| #endif |
| |
| |
| #define CACHEDIR "__pycache__" |
| |
| /* See _PyImport_FixupExtensionObject() below */ |
| static PyObject *extensions = NULL; |
| |
| /* Function from Parser/tokenizer.c */ |
| extern char * PyTokenizer_FindEncodingFilename(int, PyObject *); |
| |
| /* This table is defined in config.c: */ |
| extern struct _inittab _PyImport_Inittab[]; |
| |
| struct _inittab *PyImport_Inittab = _PyImport_Inittab; |
| |
| static PyObject *initstr = NULL; |
| |
| /* Initialize things */ |
| |
| void |
| _PyImport_Init(void) |
| { |
| initstr = PyUnicode_InternFromString("__init__"); |
| if (initstr == NULL) |
| Py_FatalError("Can't initialize import variables"); |
| } |
| |
| void |
| _PyImportHooks_Init(void) |
| { |
| PyObject *v, *path_hooks = NULL; |
| int err = 0; |
| |
| /* adding sys.path_hooks and sys.path_importer_cache */ |
| v = PyList_New(0); |
| if (v == NULL) |
| goto error; |
| err = PySys_SetObject("meta_path", v); |
| Py_DECREF(v); |
| if (err) |
| goto error; |
| v = PyDict_New(); |
| if (v == NULL) |
| goto error; |
| err = PySys_SetObject("path_importer_cache", v); |
| Py_DECREF(v); |
| if (err) |
| goto error; |
| path_hooks = PyList_New(0); |
| if (path_hooks == NULL) |
| goto error; |
| err = PySys_SetObject("path_hooks", path_hooks); |
| if (err) { |
| error: |
| PyErr_Print(); |
| Py_FatalError("initializing sys.meta_path, sys.path_hooks, " |
| "or path_importer_cache failed"); |
| } |
| Py_DECREF(path_hooks); |
| } |
| |
| void |
| _PyImportZip_Init(void) |
| { |
| PyObject *path_hooks, *zimpimport; |
| int err = 0; |
| |
| path_hooks = PySys_GetObject("path_hooks"); |
| if (path_hooks == NULL) |
| goto error; |
| |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# installing zipimport hook\n"); |
| |
| zimpimport = PyImport_ImportModule("zipimport"); |
| if (zimpimport == NULL) { |
| PyErr_Clear(); /* No zip import module -- okay */ |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# can't import zipimport\n"); |
| } |
| else { |
| _Py_IDENTIFIER(zipimporter); |
| PyObject *zipimporter = _PyObject_GetAttrId(zimpimport, |
| &PyId_zipimporter); |
| Py_DECREF(zimpimport); |
| if (zipimporter == NULL) { |
| PyErr_Clear(); /* No zipimporter object -- okay */ |
| if (Py_VerboseFlag) |
| PySys_WriteStderr( |
| "# can't import zipimport.zipimporter\n"); |
| } |
| else { |
| /* sys.path_hooks.insert(0, zipimporter) */ |
| err = PyList_Insert(path_hooks, 0, zipimporter); |
| Py_DECREF(zipimporter); |
| if (err < 0) { |
| goto error; |
| } |
| if (Py_VerboseFlag) |
| PySys_WriteStderr( |
| "# installed zipimport hook\n"); |
| } |
| } |
| |
| return; |
| |
| error: |
| PyErr_Print(); |
| Py_FatalError("initializing zipimport failed"); |
| } |
| |
| /* Locking primitives to prevent parallel imports of the same module |
| in different threads to return with a partially loaded module. |
| These calls are serialized by the global interpreter lock. */ |
| |
| #ifdef WITH_THREAD |
| |
| #include "pythread.h" |
| |
| static PyThread_type_lock import_lock = 0; |
| static long import_lock_thread = -1; |
| static int import_lock_level = 0; |
| |
| void |
| _PyImport_AcquireLock(void) |
| { |
| long me = PyThread_get_thread_ident(); |
| if (me == -1) |
| return; /* Too bad */ |
| if (import_lock == NULL) { |
| import_lock = PyThread_allocate_lock(); |
| if (import_lock == NULL) |
| return; /* Nothing much we can do. */ |
| } |
| if (import_lock_thread == me) { |
| import_lock_level++; |
| return; |
| } |
| if (import_lock_thread != -1 || !PyThread_acquire_lock(import_lock, 0)) |
| { |
| PyThreadState *tstate = PyEval_SaveThread(); |
| PyThread_acquire_lock(import_lock, 1); |
| PyEval_RestoreThread(tstate); |
| } |
| import_lock_thread = me; |
| import_lock_level = 1; |
| } |
| |
| int |
| _PyImport_ReleaseLock(void) |
| { |
| long me = PyThread_get_thread_ident(); |
| if (me == -1 || import_lock == NULL) |
| return 0; /* Too bad */ |
| if (import_lock_thread != me) |
| return -1; |
| import_lock_level--; |
| if (import_lock_level == 0) { |
| import_lock_thread = -1; |
| PyThread_release_lock(import_lock); |
| } |
| return 1; |
| } |
| |
| /* This function is called from PyOS_AfterFork to ensure that newly |
| created child processes do not share locks with the parent. |
| We now acquire the import lock around fork() calls but on some platforms |
| (Solaris 9 and earlier? see isue7242) that still left us with problems. */ |
| |
| void |
| _PyImport_ReInitLock(void) |
| { |
| if (import_lock != NULL) |
| import_lock = PyThread_allocate_lock(); |
| if (import_lock_level > 1) { |
| /* Forked as a side effect of import */ |
| long me = PyThread_get_thread_ident(); |
| PyThread_acquire_lock(import_lock, 0); |
| /* XXX: can the previous line fail? */ |
| import_lock_thread = me; |
| import_lock_level--; |
| } else { |
| import_lock_thread = -1; |
| import_lock_level = 0; |
| } |
| } |
| |
| #endif |
| |
| static PyObject * |
| imp_lock_held(PyObject *self, PyObject *noargs) |
| { |
| #ifdef WITH_THREAD |
| return PyBool_FromLong(import_lock_thread != -1); |
| #else |
| return PyBool_FromLong(0); |
| #endif |
| } |
| |
| static PyObject * |
| imp_acquire_lock(PyObject *self, PyObject *noargs) |
| { |
| #ifdef WITH_THREAD |
| _PyImport_AcquireLock(); |
| #endif |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyObject * |
| imp_release_lock(PyObject *self, PyObject *noargs) |
| { |
| #ifdef WITH_THREAD |
| if (_PyImport_ReleaseLock() < 0) { |
| PyErr_SetString(PyExc_RuntimeError, |
| "not holding the import lock"); |
| return NULL; |
| } |
| #endif |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| void |
| _PyImport_Fini(void) |
| { |
| Py_XDECREF(extensions); |
| extensions = NULL; |
| #ifdef WITH_THREAD |
| if (import_lock != NULL) { |
| PyThread_free_lock(import_lock); |
| import_lock = NULL; |
| } |
| #endif |
| } |
| |
| /* Helper for sys */ |
| |
| PyObject * |
| PyImport_GetModuleDict(void) |
| { |
| PyInterpreterState *interp = PyThreadState_GET()->interp; |
| if (interp->modules == NULL) |
| Py_FatalError("PyImport_GetModuleDict: no module dictionary!"); |
| return interp->modules; |
| } |
| |
| |
| /* List of names to clear in sys */ |
| static char* sys_deletes[] = { |
| "path", "argv", "ps1", "ps2", |
| "last_type", "last_value", "last_traceback", |
| "path_hooks", "path_importer_cache", "meta_path", |
| /* misc stuff */ |
| "flags", "float_info", |
| NULL |
| }; |
| |
| static char* sys_files[] = { |
| "stdin", "__stdin__", |
| "stdout", "__stdout__", |
| "stderr", "__stderr__", |
| NULL |
| }; |
| |
| |
| /* Un-initialize things, as good as we can */ |
| |
| void |
| PyImport_Cleanup(void) |
| { |
| Py_ssize_t pos, ndone; |
| PyObject *key, *value, *dict; |
| PyInterpreterState *interp = PyThreadState_GET()->interp; |
| PyObject *modules = interp->modules; |
| |
| if (modules == NULL) |
| return; /* Already done */ |
| |
| /* Delete some special variables first. These are common |
| places where user values hide and people complain when their |
| destructors fail. Since the modules containing them are |
| deleted *last* of all, they would come too late in the normal |
| destruction order. Sigh. */ |
| |
| value = PyDict_GetItemString(modules, "builtins"); |
| if (value != NULL && PyModule_Check(value)) { |
| dict = PyModule_GetDict(value); |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# clear builtins._\n"); |
| PyDict_SetItemString(dict, "_", Py_None); |
| } |
| value = PyDict_GetItemString(modules, "sys"); |
| if (value != NULL && PyModule_Check(value)) { |
| char **p; |
| PyObject *v; |
| dict = PyModule_GetDict(value); |
| for (p = sys_deletes; *p != NULL; p++) { |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# clear sys.%s\n", *p); |
| PyDict_SetItemString(dict, *p, Py_None); |
| } |
| for (p = sys_files; *p != NULL; p+=2) { |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# restore sys.%s\n", *p); |
| v = PyDict_GetItemString(dict, *(p+1)); |
| if (v == NULL) |
| v = Py_None; |
| PyDict_SetItemString(dict, *p, v); |
| } |
| } |
| |
| /* First, delete __main__ */ |
| value = PyDict_GetItemString(modules, "__main__"); |
| if (value != NULL && PyModule_Check(value)) { |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# cleanup __main__\n"); |
| _PyModule_Clear(value); |
| PyDict_SetItemString(modules, "__main__", Py_None); |
| } |
| |
| /* The special treatment of "builtins" here is because even |
| when it's not referenced as a module, its dictionary is |
| referenced by almost every module's __builtins__. Since |
| deleting a module clears its dictionary (even if there are |
| references left to it), we need to delete the "builtins" |
| module last. Likewise, we don't delete sys until the very |
| end because it is implicitly referenced (e.g. by print). |
| |
| Also note that we 'delete' modules by replacing their entry |
| in the modules dict with None, rather than really deleting |
| them; this avoids a rehash of the modules dictionary and |
| also marks them as "non existent" so they won't be |
| re-imported. */ |
| |
| /* Next, repeatedly delete modules with a reference count of |
| one (skipping builtins and sys) and delete them */ |
| do { |
| ndone = 0; |
| pos = 0; |
| while (PyDict_Next(modules, &pos, &key, &value)) { |
| if (value->ob_refcnt != 1) |
| continue; |
| if (PyUnicode_Check(key) && PyModule_Check(value)) { |
| if (PyUnicode_CompareWithASCIIString(key, "builtins") == 0) |
| continue; |
| if (PyUnicode_CompareWithASCIIString(key, "sys") == 0) |
| continue; |
| if (Py_VerboseFlag) |
| PySys_FormatStderr( |
| "# cleanup[1] %U\n", key); |
| _PyModule_Clear(value); |
| PyDict_SetItem(modules, key, Py_None); |
| ndone++; |
| } |
| } |
| } while (ndone > 0); |
| |
| /* Next, delete all modules (still skipping builtins and sys) */ |
| pos = 0; |
| while (PyDict_Next(modules, &pos, &key, &value)) { |
| if (PyUnicode_Check(key) && PyModule_Check(value)) { |
| if (PyUnicode_CompareWithASCIIString(key, "builtins") == 0) |
| continue; |
| if (PyUnicode_CompareWithASCIIString(key, "sys") == 0) |
| continue; |
| if (Py_VerboseFlag) |
| PySys_FormatStderr("# cleanup[2] %U\n", key); |
| _PyModule_Clear(value); |
| PyDict_SetItem(modules, key, Py_None); |
| } |
| } |
| |
| /* Next, delete sys and builtins (in that order) */ |
| value = PyDict_GetItemString(modules, "sys"); |
| if (value != NULL && PyModule_Check(value)) { |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# cleanup sys\n"); |
| _PyModule_Clear(value); |
| PyDict_SetItemString(modules, "sys", Py_None); |
| } |
| value = PyDict_GetItemString(modules, "builtins"); |
| if (value != NULL && PyModule_Check(value)) { |
| if (Py_VerboseFlag) |
| PySys_WriteStderr("# cleanup builtins\n"); |
| _PyModule_Clear(value); |
| PyDict_SetItemString(modules, "builtins", Py_None); |
| } |
| |
| /* Finally, clear and delete the modules directory */ |
| PyDict_Clear(modules); |
| interp->modules = NULL; |
| Py_DECREF(modules); |
| } |
| |
| |
| /* Helper for pythonrun.c -- return magic number and tag. */ |
| |
| long |
| PyImport_GetMagicNumber(void) |
| { |
| long res; |
| PyInterpreterState *interp = PyThreadState_Get()->interp; |
| PyObject *pyc_magic = PyObject_GetAttrString(interp->importlib, |
| "_RAW_MAGIC_NUMBER"); |
| if (pyc_magic == NULL) |
| return -1; |
| res = PyLong_AsLong(pyc_magic); |
| Py_DECREF(pyc_magic); |
| return res; |
| } |
| |
| |
| extern const char * _PySys_ImplCacheTag; |
| |
| const char * |
| PyImport_GetMagicTag(void) |
| { |
| return _PySys_ImplCacheTag; |
| } |
| |
| |
| /* Magic for extension modules (built-in as well as dynamically |
| loaded). To prevent initializing an extension module more than |
| once, we keep a static dictionary 'extensions' keyed by module name |
| (for built-in modules) or by filename (for dynamically loaded |
| modules), containing these modules. A copy of the module's |
| dictionary is stored by calling _PyImport_FixupExtensionObject() |
| immediately after the module initialization function succeeds. A |
| copy can be retrieved from there by calling |
| _PyImport_FindExtensionObject(). |
| |
| Modules which do support multiple initialization set their m_size |
| field to a non-negative number (indicating the size of the |
| module-specific state). They are still recorded in the extensions |
| dictionary, to avoid loading shared libraries twice. |
| */ |
| |
| int |
| _PyImport_FixupExtensionObject(PyObject *mod, PyObject *name, |
| PyObject *filename) |
| { |
| PyObject *modules, *dict; |
| struct PyModuleDef *def; |
| if (extensions == NULL) { |
| extensions = PyDict_New(); |
| if (extensions == NULL) |
| return -1; |
| } |
| if (mod == NULL || !PyModule_Check(mod)) { |
| PyErr_BadInternalCall(); |
| return -1; |
| } |
| def = PyModule_GetDef(mod); |
| if (!def) { |
| PyErr_BadInternalCall(); |
| return -1; |
| } |
| modules = PyImport_GetModuleDict(); |
| if (PyDict_SetItem(modules, name, mod) < 0) |
| return -1; |
| if (_PyState_AddModule(mod, def) < 0) { |
| PyDict_DelItem(modules, name); |
| return -1; |
| } |
| if (def->m_size == -1) { |
| if (def->m_base.m_copy) { |
| /* Somebody already imported the module, |
| likely under a different name. |
| XXX this should really not happen. */ |
| Py_DECREF(def->m_base.m_copy); |
| def->m_base.m_copy = NULL; |
| } |
| dict = PyModule_GetDict(mod); |
| if (dict == NULL) |
| return -1; |
| def->m_base.m_copy = PyDict_Copy(dict); |
| if (def->m_base.m_copy == NULL) |
| return -1; |
| } |
| PyDict_SetItem(extensions, filename, (PyObject*)def); |
| return 0; |
| } |
| |
| int |
| _PyImport_FixupBuiltin(PyObject *mod, char *name) |
| { |
| int res; |
| PyObject *nameobj; |
| nameobj = PyUnicode_InternFromString(name); |
| if (nameobj == NULL) |
| return -1; |
| res = _PyImport_FixupExtensionObject(mod, nameobj, nameobj); |
| Py_DECREF(nameobj); |
| return res; |
| } |
| |
| PyObject * |
| _PyImport_FindExtensionObject(PyObject *name, PyObject *filename) |
| { |
| PyObject *mod, *mdict; |
| PyModuleDef* def; |
| if (extensions == NULL) |
| return NULL; |
| def = (PyModuleDef*)PyDict_GetItem(extensions, filename); |
| if (def == NULL) |
| return NULL; |
| if (def->m_size == -1) { |
| /* Module does not support repeated initialization */ |
| if (def->m_base.m_copy == NULL) |
| return NULL; |
| mod = PyImport_AddModuleObject(name); |
| if (mod == NULL) |
| return NULL; |
| mdict = PyModule_GetDict(mod); |
| if (mdict == NULL) |
| return NULL; |
| if (PyDict_Update(mdict, def->m_base.m_copy)) |
| return NULL; |
| } |
| else { |
| if (def->m_base.m_init == NULL) |
| return NULL; |
| mod = def->m_base.m_init(); |
| if (mod == NULL) |
| return NULL; |
| PyDict_SetItem(PyImport_GetModuleDict(), name, mod); |
| Py_DECREF(mod); |
| } |
| if (_PyState_AddModule(mod, def) < 0) { |
| PyDict_DelItem(PyImport_GetModuleDict(), name); |
| Py_DECREF(mod); |
| return NULL; |
| } |
| if (Py_VerboseFlag) |
| PySys_FormatStderr("import %U # previously loaded (%R)\n", |
| name, filename); |
| return mod; |
| |
| } |
| |
| PyObject * |
| _PyImport_FindBuiltin(const char *name) |
| { |
| PyObject *res, *nameobj; |
| nameobj = PyUnicode_InternFromString(name); |
| if (nameobj == NULL) |
| return NULL; |
| res = _PyImport_FindExtensionObject(nameobj, nameobj); |
| Py_DECREF(nameobj); |
| return res; |
| } |
| |
| /* Get the module object corresponding to a module name. |
| First check the modules dictionary if there's one there, |
| if not, create a new one and insert it in the modules dictionary. |
| Because the former action is most common, THIS DOES NOT RETURN A |
| 'NEW' REFERENCE! */ |
| |
| PyObject * |
| PyImport_AddModuleObject(PyObject *name) |
| { |
| PyObject *modules = PyImport_GetModuleDict(); |
| PyObject *m; |
| |
| if ((m = PyDict_GetItem(modules, name)) != NULL && |
| PyModule_Check(m)) |
| return m; |
| m = PyModule_NewObject(name); |
| if (m == NULL) |
| return NULL; |
| if (PyDict_SetItem(modules, name, m) != 0) { |
| Py_DECREF(m); |
| return NULL; |
| } |
| Py_DECREF(m); /* Yes, it still exists, in modules! */ |
| |
| return m; |
| } |
| |
| PyObject * |
| PyImport_AddModule(const char *name) |
| { |
| PyObject *nameobj, *module; |
| nameobj = PyUnicode_FromString(name); |
| if (nameobj == NULL) |
| return NULL; |
| module = PyImport_AddModuleObject(nameobj); |
| Py_DECREF(nameobj); |
| return module; |
| } |
| |
| |
| /* Remove name from sys.modules, if it's there. */ |
| static void |
| remove_module(PyObject *name) |
| { |
| PyObject *modules = PyImport_GetModuleDict(); |
| if (PyDict_GetItem(modules, name) == NULL) |
| return; |
| if (PyDict_DelItem(modules, name) < 0) |
| Py_FatalError("import: deleting existing key in" |
| "sys.modules failed"); |
| } |
| |
| |
| /* Execute a code object in a module and return the module object |
| * WITH INCREMENTED REFERENCE COUNT. If an error occurs, name is |
| * removed from sys.modules, to avoid leaving damaged module objects |
| * in sys.modules. The caller may wish to restore the original |
| * module object (if any) in this case; PyImport_ReloadModule is an |
| * example. |
| * |
| * Note that PyImport_ExecCodeModuleWithPathnames() is the preferred, richer |
| * interface. The other two exist primarily for backward compatibility. |
| */ |
| PyObject * |
| PyImport_ExecCodeModule(char *name, PyObject *co) |
| { |
| return PyImport_ExecCodeModuleWithPathnames( |
| name, co, (char *)NULL, (char *)NULL); |
| } |
| |
| PyObject * |
| PyImport_ExecCodeModuleEx(char *name, PyObject *co, char *pathname) |
| { |
| return PyImport_ExecCodeModuleWithPathnames( |
| name, co, pathname, (char *)NULL); |
| } |
| |
| PyObject * |
| PyImport_ExecCodeModuleWithPathnames(char *name, PyObject *co, char *pathname, |
| char *cpathname) |
| { |
| PyObject *m = NULL; |
| PyObject *nameobj, *pathobj = NULL, *cpathobj = NULL; |
| |
| nameobj = PyUnicode_FromString(name); |
| if (nameobj == NULL) |
| return NULL; |
| |
| if (cpathname != NULL) { |
| cpathobj = PyUnicode_DecodeFSDefault(cpathname); |
| if (cpathobj == NULL) |
| goto error; |
| } |
| else |
| cpathobj = NULL; |
| |
| if (pathname != NULL) { |
| pathobj = PyUnicode_DecodeFSDefault(pathname); |
| if (pathobj == NULL) |
| goto error; |
| } |
| else if (cpathobj != NULL) { |
| PyInterpreterState *interp = PyThreadState_GET()->interp; |
| _Py_IDENTIFIER(_get_sourcefile); |
| |
| if (interp == NULL) { |
| Py_FatalError("PyImport_ExecCodeModuleWithPathnames: " |
| "no interpreter!"); |
| } |
| |
| pathobj = _PyObject_CallMethodObjIdArgs(interp->importlib, |
| &PyId__get_sourcefile, cpathobj, |
| NULL); |
| if (pathobj == NULL) |
| PyErr_Clear(); |
| } |
| else |
| pathobj = NULL; |
| |
| m = PyImport_ExecCodeModuleObject(nameobj, co, pathobj, cpathobj); |
| error: |
| Py_DECREF(nameobj); |
| Py_XDECREF(pathobj); |
| Py_XDECREF(cpathobj); |
| return m; |
| } |
| |
| PyObject* |
| PyImport_ExecCodeModuleObject(PyObject *name, PyObject *co, PyObject *pathname, |
| PyObject *cpathname) |
| { |
| PyObject *modules = PyImport_GetModuleDict(); |
| PyObject *m, *d, *v; |
| |
| m = PyImport_AddModuleObject(name); |
| if (m == NULL) |
| return NULL; |
| /* If the module is being reloaded, we get the old module back |
| and re-use its dict to exec the new code. */ |
| d = PyModule_GetDict(m); |
| if (PyDict_GetItemString(d, "__builtins__") == NULL) { |
| if (PyDict_SetItemString(d, "__builtins__", |
| PyEval_GetBuiltins()) != 0) |
| goto error; |
| } |
| if (pathname != NULL) { |
| v = pathname; |
| } |
| else { |
| v = ((PyCodeObject *)co)->co_filename; |
| } |
| Py_INCREF(v); |
| if (PyDict_SetItemString(d, "__file__", v) != 0) |
| PyErr_Clear(); /* Not important enough to report */ |
| Py_DECREF(v); |
| |
| /* Remember the pyc path name as the __cached__ attribute. */ |
| if (cpathname != NULL) |
| v = cpathname; |
| else |
| v = Py_None; |
| if (PyDict_SetItemString(d, "__cached__", v) != 0) |
| PyErr_Clear(); /* Not important enough to report */ |
| |
| v = PyEval_EvalCode(co, d, d); |
| if (v == NULL) |
| goto error; |
| Py_DECREF(v); |
| |
| if ((m = PyDict_GetItem(modules, name)) == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "Loaded module %R not found in sys.modules", |
| name); |
| return NULL; |
| } |
| |
| Py_INCREF(m); |
| |
| return m; |
| |
| error: |
| remove_module(name); |
| return NULL; |
| } |
| |
| |
| static void |
| update_code_filenames(PyCodeObject *co, PyObject *oldname, PyObject *newname) |
| { |
| PyObject *constants, *tmp; |
| Py_ssize_t i, n; |
| |
| if (PyUnicode_Compare(co->co_filename, oldname)) |
| return; |
| |
| tmp = co->co_filename; |
| co->co_filename = newname; |
| Py_INCREF(co->co_filename); |
| Py_DECREF(tmp); |
| |
| constants = co->co_consts; |
| n = PyTuple_GET_SIZE(constants); |
| for (i = 0; i < n; i++) { |
| tmp = PyTuple_GET_ITEM(constants, i); |
| if (PyCode_Check(tmp)) |
| update_code_filenames((PyCodeObject *)tmp, |
| oldname, newname); |
| } |
| } |
| |
| static void |
| update_compiled_module(PyCodeObject *co, PyObject *newname) |
| { |
| PyObject *oldname; |
| |
| if (PyUnicode_Compare(co->co_filename, newname) == 0) |
| return; |
| |
| oldname = co->co_filename; |
| Py_INCREF(oldname); |
| update_code_filenames(co, oldname, newname); |
| Py_DECREF(oldname); |
| } |
| |
| static PyObject * |
| imp_fix_co_filename(PyObject *self, PyObject *args) |
| { |
| PyObject *co; |
| PyObject *file_path; |
| |
| if (!PyArg_ParseTuple(args, "OO:_fix_co_filename", &co, &file_path)) |
| return NULL; |
| |
| if (!PyCode_Check(co)) { |
| PyErr_SetString(PyExc_TypeError, |
| "first argument must be a code object"); |
| return NULL; |
| } |
| |
| if (!PyUnicode_Check(file_path)) { |
| PyErr_SetString(PyExc_TypeError, |
| "second argument must be a string"); |
| return NULL; |
| } |
| |
| update_compiled_module((PyCodeObject*)co, file_path); |
| |
| Py_RETURN_NONE; |
| } |
| |
| |
| /* Forward */ |
| static struct _frozen * find_frozen(PyObject *); |
| |
| |
| /* Helper to test for built-in module */ |
| |
| static int |
| is_builtin(PyObject *name) |
| { |
| int i, cmp; |
| for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
| cmp = PyUnicode_CompareWithASCIIString(name, PyImport_Inittab[i].name); |
| if (cmp == 0) { |
| if (PyImport_Inittab[i].initfunc == NULL) |
| return -1; |
| else |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* Return an importer object for a sys.path/pkg.__path__ item 'p', |
| possibly by fetching it from the path_importer_cache dict. If it |
| wasn't yet cached, traverse path_hooks until a hook is found |
| that can handle the path item. Return None if no hook could; |
| this tells our caller it should fall back to the builtin |
| import mechanism. Cache the result in path_importer_cache. |
| Returns a borrowed reference. */ |
| |
| static PyObject * |
| get_path_importer(PyObject *path_importer_cache, PyObject *path_hooks, |
| PyObject *p) |
| { |
| PyObject *importer; |
| Py_ssize_t j, nhooks; |
| |
| /* These conditions are the caller's responsibility: */ |
| assert(PyList_Check(path_hooks)); |
| assert(PyDict_Check(path_importer_cache)); |
| |
| nhooks = PyList_Size(path_hooks); |
| if (nhooks < 0) |
| return NULL; /* Shouldn't happen */ |
| |
| importer = PyDict_GetItem(path_importer_cache, p); |
| if (importer != NULL) |
| return importer; |
| |
| /* set path_importer_cache[p] to None to avoid recursion */ |
| if (PyDict_SetItem(path_importer_cache, p, Py_None) != 0) |
| return NULL; |
| |
| for (j = 0; j < nhooks; j++) { |
| PyObject *hook = PyList_GetItem(path_hooks, j); |
| if (hook == NULL) |
| return NULL; |
| importer = PyObject_CallFunctionObjArgs(hook, p, NULL); |
| if (importer != NULL) |
| break; |
| |
| if (!PyErr_ExceptionMatches(PyExc_ImportError)) { |
| return NULL; |
| } |
| PyErr_Clear(); |
| } |
| if (importer == NULL) { |
| return Py_None; |
| } |
| if (importer != NULL) { |
| int err = PyDict_SetItem(path_importer_cache, p, importer); |
| Py_DECREF(importer); |
| if (err != 0) |
| return NULL; |
| } |
| return importer; |
| } |
| |
| PyAPI_FUNC(PyObject *) |
| PyImport_GetImporter(PyObject *path) { |
| PyObject *importer=NULL, *path_importer_cache=NULL, *path_hooks=NULL; |
| |
| if ((path_importer_cache = PySys_GetObject("path_importer_cache"))) { |
| if ((path_hooks = PySys_GetObject("path_hooks"))) { |
| importer = get_path_importer(path_importer_cache, |
| path_hooks, path); |
| } |
| } |
| Py_XINCREF(importer); /* get_path_importer returns a borrowed reference */ |
| return importer; |
| } |
| |
| |
| static int init_builtin(PyObject *); /* Forward */ |
| |
| /* Initialize a built-in module. |
| Return 1 for success, 0 if the module is not found, and -1 with |
| an exception set if the initialization failed. */ |
| |
| static int |
| init_builtin(PyObject *name) |
| { |
| struct _inittab *p; |
| |
| if (_PyImport_FindExtensionObject(name, name) != NULL) |
| return 1; |
| |
| for (p = PyImport_Inittab; p->name != NULL; p++) { |
| PyObject *mod; |
| PyModuleDef *def; |
| if (PyUnicode_CompareWithASCIIString(name, p->name) == 0) { |
| if (p->initfunc == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "Cannot re-init internal module %R", |
| name); |
| return -1; |
| } |
| mod = (*p->initfunc)(); |
| if (mod == 0) |
| return -1; |
| /* Remember pointer to module init function. */ |
| def = PyModule_GetDef(mod); |
| def->m_base.m_init = p->initfunc; |
| if (_PyImport_FixupExtensionObject(mod, name, name) < 0) |
| return -1; |
| /* FixupExtension has put the module into sys.modules, |
| so we can release our own reference. */ |
| Py_DECREF(mod); |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* Frozen modules */ |
| |
| static struct _frozen * |
| find_frozen(PyObject *name) |
| { |
| struct _frozen *p; |
| |
| if (name == NULL) |
| return NULL; |
| |
| for (p = PyImport_FrozenModules; ; p++) { |
| if (p->name == NULL) |
| return NULL; |
| if (PyUnicode_CompareWithASCIIString(name, p->name) == 0) |
| break; |
| } |
| return p; |
| } |
| |
| static PyObject * |
| get_frozen_object(PyObject *name) |
| { |
| struct _frozen *p = find_frozen(name); |
| int size; |
| |
| if (p == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "No such frozen object named %R", |
| name); |
| return NULL; |
| } |
| if (p->code == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "Excluded frozen object named %R", |
| name); |
| return NULL; |
| } |
| size = p->size; |
| if (size < 0) |
| size = -size; |
| return PyMarshal_ReadObjectFromString((char *)p->code, size); |
| } |
| |
| static PyObject * |
| is_frozen_package(PyObject *name) |
| { |
| struct _frozen *p = find_frozen(name); |
| int size; |
| |
| if (p == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "No such frozen object named %R", |
| name); |
| return NULL; |
| } |
| |
| size = p->size; |
| |
| if (size < 0) |
| Py_RETURN_TRUE; |
| else |
| Py_RETURN_FALSE; |
| } |
| |
| |
| /* Initialize a frozen module. |
| Return 1 for success, 0 if the module is not found, and -1 with |
| an exception set if the initialization failed. |
| This function is also used from frozenmain.c */ |
| |
| int |
| PyImport_ImportFrozenModuleObject(PyObject *name) |
| { |
| struct _frozen *p; |
| PyObject *co, *m, *path; |
| int ispackage; |
| int size; |
| |
| p = find_frozen(name); |
| |
| if (p == NULL) |
| return 0; |
| if (p->code == NULL) { |
| PyErr_Format(PyExc_ImportError, |
| "Excluded frozen object named %R", |
| name); |
| return -1; |
| } |
| size = p->size; |
| ispackage = (size < 0); |
| if (ispackage) |
| size = -size; |
| co = PyMarshal_ReadObjectFromString((char *)p->code, size); |
| if (co == NULL) |
| return -1; |
| if (!PyCode_Check(co)) { |
| PyErr_Format(PyExc_TypeError, |
| "frozen object %R is not a code object", |
| name); |
| goto err_return; |
| } |
| if (ispackage) { |
| /* Set __path__ to the package name */ |
| PyObject *d, *l; |
| int err; |
| m = PyImport_AddModuleObject(name); |
| if (m == NULL) |
| goto err_return; |
| d = PyModule_GetDict(m); |
| l = PyList_New(1); |
| if (l == NULL) { |
| goto err_return; |
| } |
| Py_INCREF(name); |
| PyList_SET_ITEM(l, 0, name); |
| err = PyDict_SetItemString(d, "__path__", l); |
| Py_DECREF(l); |
| if (err != 0) |
| goto err_return; |
| } |
| path = PyUnicode_FromString("<frozen>"); |
| if (path == NULL) |
| goto err_return; |
| m = PyImport_ExecCodeModuleObject(name, co, path, NULL); |
| Py_DECREF(path); |
| if (m == NULL) |
| goto err_return; |
| Py_DECREF(co); |
| Py_DECREF(m); |
| return 1; |
| err_return: |
| Py_DECREF(co); |
| return -1; |
| } |
| |
| int |
| PyImport_ImportFrozenModule(char *name) |
| { |
| PyObject *nameobj; |
| int ret; |
| nameobj = PyUnicode_InternFromString(name); |
| if (nameobj == NULL) |
| return -1; |
| ret = PyImport_ImportFrozenModuleObject(nameobj); |
| Py_DECREF(nameobj); |
| return ret; |
| } |
| |
| |
| /* Import a module, either built-in, frozen, or external, and return |
| its module object WITH INCREMENTED REFERENCE COUNT */ |
| |
| PyObject * |
| PyImport_ImportModule(const char *name) |
| { |
| PyObject *pname; |
| PyObject *result; |
| |
| pname = PyUnicode_FromString(name); |
| if (pname == NULL) |
| return NULL; |
| result = PyImport_Import(pname); |
| Py_DECREF(pname); |
| return result; |
| } |
| |
| /* Import a module without blocking |
| * |
| * At first it tries to fetch the module from sys.modules. If the module was |
| * never loaded before it loads it with PyImport_ImportModule() unless another |
| * thread holds the import lock. In the latter case the function raises an |
| * ImportError instead of blocking. |
| * |
| * Returns the module object with incremented ref count. |
| */ |
| PyObject * |
| PyImport_ImportModuleNoBlock(const char *name) |
| { |
| return PyImport_ImportModule(name); |
| } |
| |
| |
| /* Remove importlib frames from the traceback, |
| * except in Verbose mode. */ |
| static void |
| remove_importlib_frames(void) |
| { |
| const char *importlib_filename = "<frozen importlib._bootstrap>"; |
| const char *remove_frames = "_call_with_frames_removed"; |
| int always_trim = 0; |
| int in_importlib = 0; |
| PyObject *exception, *value, *base_tb, *tb; |
| PyObject **prev_link, **outer_link = NULL; |
| |
| /* Synopsis: if it's an ImportError, we trim all importlib chunks |
| from the traceback. We always trim chunks |
| which end with a call to "_call_with_frames_removed". */ |
| |
| PyErr_Fetch(&exception, &value, &base_tb); |
| if (!exception || Py_VerboseFlag) |
| goto done; |
| if (PyType_IsSubtype((PyTypeObject *) exception, |
| (PyTypeObject *) PyExc_ImportError)) |
| always_trim = 1; |
| |
| prev_link = &base_tb; |
| tb = base_tb; |
| while (tb != NULL) { |
| PyTracebackObject *traceback = (PyTracebackObject *)tb; |
| PyObject *next = (PyObject *) traceback->tb_next; |
| PyFrameObject *frame = traceback->tb_frame; |
| PyCodeObject *code = frame->f_code; |
| int now_in_importlib; |
| |
| assert(PyTraceBack_Check(tb)); |
| now_in_importlib = (PyUnicode_CompareWithASCIIString( |
| code->co_filename, |
| importlib_filename) == 0); |
| if (now_in_importlib && !in_importlib) { |
| /* This is the link to this chunk of importlib tracebacks */ |
| outer_link = prev_link; |
| } |
| in_importlib = now_in_importlib; |
| |
| if (in_importlib && |
| (always_trim || |
| PyUnicode_CompareWithASCIIString(code->co_name, |
| remove_frames) == 0)) { |
| PyObject *tmp = *outer_link; |
| *outer_link = next; |
| Py_XINCREF(next); |
| Py_DECREF(tmp); |
| prev_link = outer_link; |
| } |
| else { |
| prev_link = (PyObject **) &traceback->tb_next; |
| } |
| tb = next; |
| } |
| done: |
| PyErr_Restore(exception, value, base_tb); |
| } |
| |
| |
| PyObject * |
| PyImport_ImportModuleLevelObject(PyObject *name, PyObject *given_globals, |
| PyObject *locals, PyObject *given_fromlist, |
| int level) |
| { |
| _Py_IDENTIFIER(__import__); |
| _Py_IDENTIFIER(__initializing__); |
| _Py_IDENTIFIER(__package__); |
| _Py_IDENTIFIER(__path__); |
| _Py_IDENTIFIER(__name__); |
| _Py_IDENTIFIER(_find_and_load); |
| _Py_IDENTIFIER(_handle_fromlist); |
| _Py_IDENTIFIER(_lock_unlock_module); |
| _Py_static_string(single_dot, "."); |
| PyObject *abs_name = NULL; |
| PyObject *builtins_import = NULL; |
| PyObject *final_mod = NULL; |
| PyObject *mod = NULL; |
| PyObject *package = NULL; |
| PyObject *globals = NULL; |
| PyObject *fromlist = NULL; |
| PyInterpreterState *interp = PyThreadState_GET()->interp; |
| |
| /* Make sure to use default values so as to not have |
| PyObject_CallMethodObjArgs() truncate the parameter list because of a |
| NULL argument. */ |
| if (given_globals == NULL) { |
| globals = PyDict_New(); |
| if (globals == NULL) { |
| goto error; |
| } |
| } |
| else { |
| /* Only have to care what given_globals is if it will be used |
| fortsomething. */ |
| if (level > 0 && !PyDict_Check(given_globals)) { |
| PyErr_SetString(PyExc_TypeError, "globals must be a dict"); |
| goto error; |
| } |
| globals = given_globals; |
| Py_INCREF(globals); |
| } |
| |
| if (given_fromlist == NULL) { |
| fromlist = PyList_New(0); |
| if (fromlist == NULL) { |
| goto error; |
| } |
| } |
| else { |
| fromlist = given_fromlist; |
| Py_INCREF(fromlist); |
| } |
| if (name == NULL) { |
| PyErr_SetString(PyExc_ValueError, "Empty module name"); |
| goto error; |
| } |
| |
| /* The below code is importlib.__import__() & _gcd_import(), ported to C |
| for added performance. */ |
| |
| if (!PyUnicode_Check(name)) { |
| PyErr_SetString(PyExc_TypeError, "module name must be a string"); |
| goto error; |
| } |
| else if (PyUnicode_READY(name) < 0) { |
| goto error; |
| } |
| if (level < 0) { |
| PyErr_SetString(PyExc_ValueError, "level must be >= 0"); |
| goto error; |
| } |
| else if (level > 0) { |
| package = _PyDict_GetItemId(globals, &PyId___package__); |
| if (package != NULL && package != Py_None) { |
| Py_INCREF(package); |
| if (!PyUnicode_Check(package)) { |
| PyErr_SetString(PyExc_TypeError, "package must be a string"); |
| goto error; |
| } |
| } |
| else { |
| package = _PyDict_GetItemId(globals, &PyId___name__); |
| if (package == NULL) { |
| PyErr_SetString(PyExc_KeyError, "'__name__' not in globals"); |
| goto error; |
| } |
| else if (!PyUnicode_Check(package)) { |
| PyErr_SetString(PyExc_TypeError, "__name__ must be a string"); |
| } |
| Py_INCREF(package); |
| |
| if (_PyDict_GetItemId(globals, &PyId___path__) == NULL) { |
| PyObject *partition = NULL; |
| PyObject *borrowed_dot = _PyUnicode_FromId(&single_dot); |
| if (borrowed_dot == NULL) { |
| goto error; |
| } |
| partition = PyUnicode_RPartition(package, borrowed_dot); |
| Py_DECREF(package); |
| if (partition == NULL) { |
| goto error; |
| } |
| package = PyTuple_GET_ITEM(partition, 0); |
| Py_INCREF(package); |
| Py_DECREF(partition); |
| } |
| } |
| |
| if (PyDict_GetItem(interp->modules, package) == NULL) { |
| PyErr_Format(PyExc_SystemError, |
| "Parent module %R not loaded, cannot perform relative " |
| "import", package); |
| goto error; |
| } |
| } |
| else { /* level == 0 */ |
| if (PyUnicode_GET_LENGTH(name) == 0) { |
| PyErr_SetString(PyExc_ValueError, "Empty module name"); |
| goto error; |
| } |
| package = Py_None; |
| Py_INCREF(package); |
| } |
| |
| if (level > 0) { |
| Py_ssize_t last_dot = PyUnicode_GET_LENGTH(package); |
| PyObject *base = NULL; |
| int level_up = 1; |
| |
| for (level_up = 1; level_up < level; level_up += 1) { |
| last_dot = PyUnicode_FindChar(package, '.', 0, last_dot, -1); |
| if (last_dot == -2) { |
| goto error; |
| } |
| else if (last_dot == -1) { |
| PyErr_SetString(PyExc_ValueError, |
| "attempted relative import beyond top-level " |
| "package"); |
| goto error; |
| } |
| } |
| base = PyUnicode_Substring(package, 0, last_dot); |
| if (PyUnicode_GET_LENGTH(name) > 0) { |
| PyObject *borrowed_dot, *seq = NULL; |
| |
| borrowed_dot = _PyUnicode_FromId(&single_dot); |
| seq = PyTuple_Pack(2, base, name); |
| Py_DECREF(base); |
| if (borrowed_dot == NULL || seq == NULL) { |
| goto error; |
| } |
| |
| abs_name = PyUnicode_Join(borrowed_dot, seq); |
| Py_DECREF(seq); |
| if (abs_name == NULL) { |
| goto error; |
| } |
| } |
| else { |
| abs_name = base; |
| } |
| } |
| else { |
| abs_name = name; |
| Py_INCREF(abs_name); |
| } |
| |
| #ifdef WITH_THREAD |
| _PyImport_AcquireLock(); |
| #endif |
| /* From this point forward, goto error_with_unlock! */ |
| if (PyDict_Check(globals)) { |
| builtins_import = _PyDict_GetItemId(globals, &PyId___import__); |
| } |
| if (builtins_import == NULL) { |
| builtins_import = _PyDict_GetItemId(interp->builtins, &PyId___import__); |
| if (builtins_import == NULL) { |
| Py_FatalError("__import__ missing"); |
| } |
| } |
| Py_INCREF(builtins_import); |
| |
| mod = PyDict_GetItem(interp->modules, abs_name); |
| if (mod == Py_None) { |
| PyObject *msg = PyUnicode_FromFormat("import of %R halted; " |
| "None in sys.modules", abs_name); |
| if (msg != NULL) { |
| PyErr_SetImportError(msg, abs_name, NULL); |
| Py_DECREF(msg); |
| } |
| mod = NULL; |
| goto error_with_unlock; |
| } |
| else if (mod != NULL) { |
| PyObject *value; |
| int initializing = 0; |
| |
| Py_INCREF(mod); |
| /* Only call _bootstrap._lock_unlock_module() if __initializing__ is true. */ |
| value = _PyObject_GetAttrId(mod, &PyId___initializing__); |
| if (value == NULL) |
| PyErr_Clear(); |
| else { |
| initializing = PyObject_IsTrue(value); |
| Py_DECREF(value); |
| if (initializing == -1) |
| PyErr_Clear(); |
| } |
| if (initializing > 0) { |
| /* _bootstrap._lock_unlock_module() releases the import lock */ |
| value = _PyObject_CallMethodObjIdArgs(interp->importlib, |
| &PyId__lock_unlock_module, abs_name, |
| NULL); |
| if (value == NULL) |
| goto error; |
| Py_DECREF(value); |
| } |
| else { |
| #ifdef WITH_THREAD |
| if (_PyImport_ReleaseLock() < 0) { |
| PyErr_SetString(PyExc_RuntimeError, "not holding the import lock"); |
| goto error; |
| } |
| #endif |
| } |
| } |
| else { |
| /* _bootstrap._find_and_load() releases the import lock */ |
| mod = _PyObject_CallMethodObjIdArgs(interp->importlib, |
| &PyId__find_and_load, abs_name, |
| builtins_import, NULL); |
| if (mod == NULL) { |
| goto error; |
| } |
| } |
| /* From now on we don't hold the import lock anymore. */ |
| |
| if (PyObject_Not(fromlist)) { |
| if (level == 0 || PyUnicode_GET_LENGTH(name) > 0) { |
| PyObject *front = NULL; |
| PyObject *partition = NULL; |
| PyObject *borrowed_dot = _PyUnicode_FromId(&single_dot); |
| |
| if (borrowed_dot == NULL) { |
| goto error; |
| } |
| |
| partition = PyUnicode_Partition(name, borrowed_dot); |
| if (partition == NULL) { |
| goto error; |
| } |
| |
| if (PyUnicode_GET_LENGTH(PyTuple_GET_ITEM(partition, 1)) == 0) { |
| /* No dot in module name, simple exit */ |
| Py_DECREF(partition); |
| final_mod = mod; |
| Py_INCREF(mod); |
| goto error; |
| } |
| |
| front = PyTuple_GET_ITEM(partition, 0); |
| Py_INCREF(front); |
| Py_DECREF(partition); |
| |
| if (level == 0) { |
| final_mod = PyObject_CallFunctionObjArgs(builtins_import, front, NULL); |
| Py_DECREF(front); |
| } |
| else { |
| Py_ssize_t cut_off = PyUnicode_GET_LENGTH(name) - |
| PyUnicode_GET_LENGTH(front); |
| Py_ssize_t abs_name_len = PyUnicode_GET_LENGTH(abs_name); |
| PyObject *to_return = PyUnicode_Substring(abs_name, 0, |
| abs_name_len - cut_off); |
| Py_DECREF(front); |
| if (to_return == NULL) { |
| goto error; |
| } |
| |
| final_mod = PyDict_GetItem(interp->modules, to_return); |
| if (final_mod == NULL) { |
| PyErr_Format(PyExc_KeyError, |
| "%R not in sys.modules as expected", |
| to_return); |
| } |
| else { |
| Py_INCREF(final_mod); |
| } |
| Py_DECREF(to_return); |
| } |
| } |
| else { |
| final_mod = mod; |
| Py_INCREF(mod); |
| } |
| } |
| else { |
| final_mod = _PyObject_CallMethodObjIdArgs(interp->importlib, |
| &PyId__handle_fromlist, mod, |
| fromlist, builtins_import, |
| NULL); |
| } |
| goto error; |
| |
| error_with_unlock: |
| #ifdef WITH_THREAD |
| if (_PyImport_ReleaseLock() < 0) { |
| PyErr_SetString(PyExc_RuntimeError, "not holding the import lock"); |
| } |
| #endif |
| error: |
| Py_XDECREF(abs_name); |
| Py_XDECREF(builtins_import); |
| Py_XDECREF(mod); |
| Py_XDECREF(package); |
| Py_XDECREF(globals); |
| Py_XDECREF(fromlist); |
| if (final_mod == NULL) |
| remove_importlib_frames(); |
| return final_mod; |
| } |
| |
| PyObject * |
| PyImport_ImportModuleLevel(const char *name, PyObject *globals, PyObject *locals, |
| PyObject *fromlist, int level) |
| { |
| PyObject *nameobj, *mod; |
| nameobj = PyUnicode_FromString(name); |
| if (nameobj == NULL) |
| return NULL; |
| mod = PyImport_ImportModuleLevelObject(nameobj, globals, locals, |
| fromlist, level); |
| Py_DECREF(nameobj); |
| return mod; |
| } |
| |
| |
| /* Re-import a module of any kind and return its module object, WITH |
| INCREMENTED REFERENCE COUNT */ |
| |
| PyObject * |
| PyImport_ReloadModule(PyObject *m) |
| { |
| _Py_IDENTIFIER(reload); |
| PyObject *reloaded_module = NULL; |
| PyObject *modules = PyImport_GetModuleDict(); |
| PyObject *imp = PyDict_GetItemString(modules, "imp"); |
| if (imp == NULL) { |
| imp = PyImport_ImportModule("imp"); |
| if (imp == NULL) { |
| return NULL; |
| } |
| } |
| else { |
| Py_INCREF(imp); |
| } |
| |
| reloaded_module = _PyObject_CallMethodId(imp, &PyId_reload, "O", m); |
| Py_DECREF(imp); |
| return reloaded_module; |
| } |
| |
| |
| /* Higher-level import emulator which emulates the "import" statement |
| more accurately -- it invokes the __import__() function from the |
| builtins of the current globals. This means that the import is |
| done using whatever import hooks are installed in the current |
| environment. |
| A dummy list ["__doc__"] is passed as the 4th argument so that |
| e.g. PyImport_Import(PyUnicode_FromString("win32com.client.gencache")) |
| will return <module "gencache"> instead of <module "win32com">. */ |
| |
| PyObject * |
| PyImport_Import(PyObject *module_name) |
| { |
| static PyObject *silly_list = NULL; |
| static PyObject *builtins_str = NULL; |
| static PyObject *import_str = NULL; |
| PyObject *globals = NULL; |
| PyObject *import = NULL; |
| PyObject *builtins = NULL; |
| PyObject *modules = NULL; |
| PyObject *r = NULL; |
| |
| /* Initialize constant string objects */ |
| if (silly_list == NULL) { |
| import_str = PyUnicode_InternFromString("__import__"); |
| if (import_str == NULL) |
| return NULL; |
| builtins_str = PyUnicode_InternFromString("__builtins__"); |
| if (builtins_str == NULL) |
| return NULL; |
| silly_list = PyList_New(0); |
| if (silly_list == NULL) |
| return NULL; |
| } |
| |
| /* Get the builtins from current globals */ |
| globals = PyEval_GetGlobals(); |
| if (globals != NULL) { |
| Py_INCREF(globals); |
| builtins = PyObject_GetItem(globals, builtins_str); |
| if (builtins == NULL) |
| goto err; |
| } |
| else { |
| /* No globals -- use standard builtins, and fake globals */ |
| builtins = PyImport_ImportModuleLevel("builtins", |
| NULL, NULL, NULL, 0); |
| if (builtins == NULL) |
| return NULL; |
| globals = Py_BuildValue("{OO}", builtins_str, builtins); |
| if (globals == NULL) |
| goto err; |
| } |
| |
| /* Get the __import__ function from the builtins */ |
| if (PyDict_Check(builtins)) { |
| import = PyObject_GetItem(builtins, import_str); |
| if (import == NULL) |
| PyErr_SetObject(PyExc_KeyError, import_str); |
| } |
| else |
| import = PyObject_GetAttr(builtins, import_str); |
| if (import == NULL) |
| goto err; |
| |
| /* Call the __import__ function with the proper argument list |
| Always use absolute import here. |
| Calling for side-effect of import. */ |
| r = PyObject_CallFunction(import, "OOOOi", module_name, globals, |
| globals, silly_list, 0, NULL); |
| if (r == NULL) |
| goto err; |
| Py_DECREF(r); |
| |
| modules = PyImport_GetModuleDict(); |
| r = PyDict_GetItem(modules, module_name); |
| if (r != NULL) |
| Py_INCREF(r); |
| |
| err: |
| Py_XDECREF(globals); |
| Py_XDECREF(builtins); |
| Py_XDECREF(import); |
| |
| return r; |
| } |
| |
| static PyObject * |
| imp_extension_suffixes(PyObject *self, PyObject *noargs) |
| { |
| PyObject *list; |
| const char *suffix; |
| unsigned int index = 0; |
| |
| list = PyList_New(0); |
| if (list == NULL) |
| return NULL; |
| #ifdef HAVE_DYNAMIC_LOADING |
| while ((suffix = _PyImport_DynLoadFiletab[index])) { |
| PyObject *item = PyUnicode_FromString(suffix); |
| if (item == NULL) { |
| Py_DECREF(list); |
| return NULL; |
| } |
| if (PyList_Append(list, item) < 0) { |
| Py_DECREF(list); |
| Py_DECREF(item); |
| return NULL; |
| } |
| Py_DECREF(item); |
| index += 1; |
| } |
| #endif |
| return list; |
| } |
| |
| static PyObject * |
| imp_init_builtin(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| int ret; |
| PyObject *m; |
| if (!PyArg_ParseTuple(args, "U:init_builtin", &name)) |
| return NULL; |
| ret = init_builtin(name); |
| if (ret < 0) |
| return NULL; |
| if (ret == 0) { |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| m = PyImport_AddModuleObject(name); |
| Py_XINCREF(m); |
| return m; |
| } |
| |
| static PyObject * |
| imp_init_frozen(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| int ret; |
| PyObject *m; |
| if (!PyArg_ParseTuple(args, "U:init_frozen", &name)) |
| return NULL; |
| ret = PyImport_ImportFrozenModuleObject(name); |
| if (ret < 0) |
| return NULL; |
| if (ret == 0) { |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| m = PyImport_AddModuleObject(name); |
| Py_XINCREF(m); |
| return m; |
| } |
| |
| static PyObject * |
| imp_get_frozen_object(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| |
| if (!PyArg_ParseTuple(args, "U:get_frozen_object", &name)) |
| return NULL; |
| return get_frozen_object(name); |
| } |
| |
| static PyObject * |
| imp_is_frozen_package(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| |
| if (!PyArg_ParseTuple(args, "U:is_frozen_package", &name)) |
| return NULL; |
| return is_frozen_package(name); |
| } |
| |
| static PyObject * |
| imp_is_builtin(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| if (!PyArg_ParseTuple(args, "U:is_builtin", &name)) |
| return NULL; |
| return PyLong_FromLong(is_builtin(name)); |
| } |
| |
| static PyObject * |
| imp_is_frozen(PyObject *self, PyObject *args) |
| { |
| PyObject *name; |
| struct _frozen *p; |
| if (!PyArg_ParseTuple(args, "U:is_frozen", &name)) |
| return NULL; |
| p = find_frozen(name); |
| return PyBool_FromLong((long) (p == NULL ? 0 : p->size)); |
| } |
| |
| #ifdef HAVE_DYNAMIC_LOADING |
| |
| static PyObject * |
| imp_load_dynamic(PyObject *self, PyObject *args) |
| { |
| PyObject *name, *pathname, *fob = NULL, *mod; |
| FILE *fp; |
| |
| if (!PyArg_ParseTuple(args, "UO&|O:load_dynamic", |
| &name, PyUnicode_FSDecoder, &pathname, &fob)) |
| return NULL; |
| if (fob != NULL) { |
| fp = _Py_fopen(pathname, "r"); |
| if (fp == NULL) { |
| Py_DECREF(pathname); |
| if (!PyErr_Occurred()) |
| PyErr_SetFromErrno(PyExc_IOError); |
| return NULL; |
| } |
| } |
| else |
| fp = NULL; |
| mod = _PyImport_LoadDynamicModule(name, pathname, fp); |
| Py_DECREF(pathname); |
| if (fp) |
| fclose(fp); |
| return mod; |
| } |
| |
| #endif /* HAVE_DYNAMIC_LOADING */ |
| |
| |
| /* Doc strings */ |
| |
| PyDoc_STRVAR(doc_imp, |
| "(Extremely) low-level import machinery bits as used by importlib and imp."); |
| |
| PyDoc_STRVAR(doc_extension_suffixes, |
| "extension_suffixes() -> list of strings\n\ |
| Returns the list of file suffixes used to identify extension modules."); |
| |
| PyDoc_STRVAR(doc_lock_held, |
| "lock_held() -> boolean\n\ |
| Return True if the import lock is currently held, else False.\n\ |
| On platforms without threads, return False."); |
| |
| PyDoc_STRVAR(doc_acquire_lock, |
| "acquire_lock() -> None\n\ |
| Acquires the interpreter's import lock for the current thread.\n\ |
| This lock should be used by import hooks to ensure thread-safety\n\ |
| when importing modules.\n\ |
| On platforms without threads, this function does nothing."); |
| |
| PyDoc_STRVAR(doc_release_lock, |
| "release_lock() -> None\n\ |
| Release the interpreter's import lock.\n\ |
| On platforms without threads, this function does nothing."); |
| |
| static PyMethodDef imp_methods[] = { |
| {"extension_suffixes", imp_extension_suffixes, METH_NOARGS, |
| doc_extension_suffixes}, |
| {"lock_held", imp_lock_held, METH_NOARGS, doc_lock_held}, |
| {"acquire_lock", imp_acquire_lock, METH_NOARGS, doc_acquire_lock}, |
| {"release_lock", imp_release_lock, METH_NOARGS, doc_release_lock}, |
| {"get_frozen_object", imp_get_frozen_object, METH_VARARGS}, |
| {"is_frozen_package", imp_is_frozen_package, METH_VARARGS}, |
| {"init_builtin", imp_init_builtin, METH_VARARGS}, |
| {"init_frozen", imp_init_frozen, METH_VARARGS}, |
| {"is_builtin", imp_is_builtin, METH_VARARGS}, |
| {"is_frozen", imp_is_frozen, METH_VARARGS}, |
| #ifdef HAVE_DYNAMIC_LOADING |
| {"load_dynamic", imp_load_dynamic, METH_VARARGS}, |
| #endif |
| {"_fix_co_filename", imp_fix_co_filename, METH_VARARGS}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| |
| static struct PyModuleDef impmodule = { |
| PyModuleDef_HEAD_INIT, |
| "_imp", |
| doc_imp, |
| 0, |
| imp_methods, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| |
| PyMODINIT_FUNC |
| PyInit_imp(void) |
| { |
| PyObject *m, *d; |
| |
| m = PyModule_Create(&impmodule); |
| if (m == NULL) |
| goto failure; |
| d = PyModule_GetDict(m); |
| if (d == NULL) |
| goto failure; |
| |
| return m; |
| failure: |
| Py_XDECREF(m); |
| return NULL; |
| } |
| |
| |
| /* API for embedding applications that want to add their own entries |
| to the table of built-in modules. This should normally be called |
| *before* Py_Initialize(). When the table resize fails, -1 is |
| returned and the existing table is unchanged. |
| |
| After a similar function by Just van Rossum. */ |
| |
| int |
| PyImport_ExtendInittab(struct _inittab *newtab) |
| { |
| static struct _inittab *our_copy = NULL; |
| struct _inittab *p; |
| int i, n; |
| |
| /* Count the number of entries in both tables */ |
| for (n = 0; newtab[n].name != NULL; n++) |
| ; |
| if (n == 0) |
| return 0; /* Nothing to do */ |
| for (i = 0; PyImport_Inittab[i].name != NULL; i++) |
| ; |
| |
| /* Allocate new memory for the combined table */ |
| p = our_copy; |
| PyMem_RESIZE(p, struct _inittab, i+n+1); |
| if (p == NULL) |
| return -1; |
| |
| /* Copy the tables into the new memory */ |
| if (our_copy != PyImport_Inittab) |
| memcpy(p, PyImport_Inittab, (i+1) * sizeof(struct _inittab)); |
| PyImport_Inittab = our_copy = p; |
| memcpy(p+i, newtab, (n+1) * sizeof(struct _inittab)); |
| |
| return 0; |
| } |
| |
| /* Shorthand to add a single entry given a name and a function */ |
| |
| int |
| PyImport_AppendInittab(const char *name, PyObject* (*initfunc)(void)) |
| { |
| struct _inittab newtab[2]; |
| |
| memset(newtab, '\0', sizeof newtab); |
| |
| newtab[0].name = (char *)name; |
| newtab[0].initfunc = initfunc; |
| |
| return PyImport_ExtendInittab(newtab); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |