diff options
Diffstat (limited to 'Python/import.c')
| -rw-r--r-- | Python/import.c | 3317 |
1 files changed, 626 insertions, 2691 deletions
diff --git a/Python/import.c b/Python/import.c index 598b7e0..2540f9d 100644 --- a/Python/import.c +++ b/Python/import.c @@ -8,6 +8,7 @@ #include "errcode.h" #include "marshal.h" #include "code.h" +#include "frameobject.h" #include "osdefs.h" #include "importdl.h" @@ -26,176 +27,38 @@ typedef unsigned short mode_t; #endif -/* Magic word to reject .pyc files generated by other Python versions. - It should change for each incompatible change to the bytecode. - - The value of CR and LF is incorporated so if you ever read or write - a .pyc file in text mode the magic number will be wrong; also, the - Apple MPW compiler swaps their values, botching string constants. - - The magic numbers must be spaced apart at least 2 values, as the - -U interpeter flag will cause MAGIC+1 being used. They have been - odd numbers for some time now. - - There were a variety of old schemes for setting the magic number. - The current working scheme is to increment the previous value by - 10. - - Starting with the adoption of PEP 3147 in Python 3.2, every bump in magic - number also includes a new "magic tag", i.e. a human readable string used - to represent the magic number in __pycache__ directories. When you change - the magic number, you must also set a new unique magic tag. Generally this - can be named after the Python major version of the magic number bump, but - it can really be anything, as long as it's different than anything else - that's come before. The tags are included in the following table, starting - with Python 3.2a0. - - Known values: - Python 1.5: 20121 - Python 1.5.1: 20121 - Python 1.5.2: 20121 - Python 1.6: 50428 - Python 2.0: 50823 - Python 2.0.1: 50823 - Python 2.1: 60202 - Python 2.1.1: 60202 - Python 2.1.2: 60202 - Python 2.2: 60717 - Python 2.3a0: 62011 - Python 2.3a0: 62021 - Python 2.3a0: 62011 (!) - Python 2.4a0: 62041 - Python 2.4a3: 62051 - Python 2.4b1: 62061 - Python 2.5a0: 62071 - Python 2.5a0: 62081 (ast-branch) - Python 2.5a0: 62091 (with) - Python 2.5a0: 62092 (changed WITH_CLEANUP opcode) - Python 2.5b3: 62101 (fix wrong code: for x, in ...) - Python 2.5b3: 62111 (fix wrong code: x += yield) - Python 2.5c1: 62121 (fix wrong lnotab with for loops and - storing constants that should have been removed) - Python 2.5c2: 62131 (fix wrong code: for x, in ... in listcomp/genexp) - Python 2.6a0: 62151 (peephole optimizations and STORE_MAP opcode) - Python 2.6a1: 62161 (WITH_CLEANUP optimization) - Python 3000: 3000 - 3010 (removed UNARY_CONVERT) - 3020 (added BUILD_SET) - 3030 (added keyword-only parameters) - 3040 (added signature annotations) - 3050 (print becomes a function) - 3060 (PEP 3115 metaclass syntax) - 3061 (string literals become unicode) - 3071 (PEP 3109 raise changes) - 3081 (PEP 3137 make __file__ and __name__ unicode) - 3091 (kill str8 interning) - 3101 (merge from 2.6a0, see 62151) - 3103 (__file__ points to source file) - Python 3.0a4: 3111 (WITH_CLEANUP optimization). - Python 3.0a5: 3131 (lexical exception stacking, including POP_EXCEPT) - Python 3.1a0: 3141 (optimize list, set and dict comprehensions: - change LIST_APPEND and SET_ADD, add MAP_ADD) - Python 3.1a0: 3151 (optimize conditional branches: - introduce POP_JUMP_IF_FALSE and POP_JUMP_IF_TRUE) - Python 3.2a0: 3160 (add SETUP_WITH) - tag: cpython-32 - Python 3.2a1: 3170 (add DUP_TOP_TWO, remove DUP_TOPX and ROT_FOUR) - tag: cpython-32 - Python 3.2a2 3180 (add DELETE_DEREF) -*/ - -/* MAGIC must change whenever the bytecode emitted by the compiler may no - longer be understood by older implementations of the eval loop (usually - due to the addition of new opcodes) - TAG must change for each major Python release. The magic number will take - care of any bytecode changes that occur during development. -*/ -#define MAGIC (3180 | ((long)'\r'<<16) | ((long)'\n'<<24)) -#define TAG "cpython-32" #define CACHEDIR "__pycache__" -/* Current magic word and string tag as globals. */ -static long pyc_magic = MAGIC; -static const char *pyc_tag = TAG; -/* See _PyImport_FixupExtensionUnicode() below */ +/* 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[]; -/* Method from Parser/tokenizer.c */ -extern char * PyTokenizer_FindEncoding(int); - struct _inittab *PyImport_Inittab = _PyImport_Inittab; -/* these tables define the module suffixes that Python recognizes */ -struct filedescr * _PyImport_Filetab = NULL; - -static const struct filedescr _PyImport_StandardFiletab[] = { - {".py", "U", PY_SOURCE}, -#ifdef MS_WINDOWS - {".pyw", "U", PY_SOURCE}, -#endif - {".pyc", "rb", PY_COMPILED}, - {0, 0} -}; - +static PyObject *initstr = NULL; /* Initialize things */ void _PyImport_Init(void) { - const struct filedescr *scan; - struct filedescr *filetab; - int countD = 0; - int countS = 0; - - /* prepare _PyImport_Filetab: copy entries from - _PyImport_DynLoadFiletab and _PyImport_StandardFiletab. - */ -#ifdef HAVE_DYNAMIC_LOADING - for (scan = _PyImport_DynLoadFiletab; scan->suffix != NULL; ++scan) - ++countD; -#endif - for (scan = _PyImport_StandardFiletab; scan->suffix != NULL; ++scan) - ++countS; - filetab = PyMem_NEW(struct filedescr, countD + countS + 1); - if (filetab == NULL) - Py_FatalError("Can't initialize import file table."); -#ifdef HAVE_DYNAMIC_LOADING - memcpy(filetab, _PyImport_DynLoadFiletab, - countD * sizeof(struct filedescr)); -#endif - memcpy(filetab + countD, _PyImport_StandardFiletab, - countS * sizeof(struct filedescr)); - filetab[countD + countS].suffix = NULL; - - _PyImport_Filetab = filetab; - - if (Py_OptimizeFlag) { - /* Replace ".pyc" with ".pyo" in _PyImport_Filetab */ - for (; filetab->suffix != NULL; filetab++) { - if (strcmp(filetab->suffix, ".pyc") == 0) - filetab->suffix = ".pyo"; - } - } + initstr = PyUnicode_InternFromString("__init__"); + if (initstr == NULL) + Py_FatalError("Can't initialize import variables"); } void _PyImportHooks_Init(void) { - PyObject *v, *path_hooks = NULL, *zimpimport; + PyObject *v, *path_hooks = NULL; int err = 0; - /* adding sys.path_hooks and sys.path_importer_cache, setting up - zipimport */ - if (PyType_Ready(&PyNullImporter_Type) < 0) - goto error; - - if (Py_VerboseFlag) - PySys_WriteStderr("# installing zipimport hook\n"); - + /* adding sys.path_hooks and sys.path_importer_cache */ v = PyList_New(0); if (v == NULL) goto error; @@ -216,11 +79,25 @@ _PyImportHooks_Init(void) err = PySys_SetObject("path_hooks", path_hooks); if (err) { error: - PyErr_Print(); - Py_FatalError("initializing sys.meta_path, sys.path_hooks, " - "path_importer_cache, or NullImporter failed" - ); + 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) { @@ -229,8 +106,9 @@ _PyImportHooks_Init(void) PySys_WriteStderr("# can't import zipimport\n"); } else { - PyObject *zipimporter = PyObject_GetAttrString(zimpimport, - "zipimporter"); + _Py_IDENTIFIER(zipimporter); + PyObject *zipimporter = _PyObject_GetAttrId(zimpimport, + &PyId_zipimporter); Py_DECREF(zimpimport); if (zipimporter == NULL) { PyErr_Clear(); /* No zipimporter object -- okay */ @@ -239,17 +117,23 @@ _PyImportHooks_Init(void) "# can't import zipimport.zipimporter\n"); } else { - /* sys.path_hooks.append(zipimporter) */ - err = PyList_Append(path_hooks, zipimporter); + /* sys.path_hooks.insert(0, zipimporter) */ + err = PyList_Insert(path_hooks, 0, zipimporter); Py_DECREF(zipimporter); - if (err) + if (err < 0) { goto error; + } if (Py_VerboseFlag) PySys_WriteStderr( "# installed zipimport hook\n"); } } - Py_DECREF(path_hooks); + + return; + + error: + PyErr_Print(); + Py_FatalError("initializing zipimport failed"); } /* Locking primitives to prevent parallel imports of the same module @@ -319,7 +203,7 @@ _PyImport_ReInitLock(void) /* 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? */ + /* XXX: can the previous line fail? */ import_lock_thread = me; import_lock_level--; } else { @@ -369,8 +253,6 @@ _PyImport_Fini(void) { Py_XDECREF(extensions); extensions = NULL; - PyMem_DEL(_PyImport_Filetab); - _PyImport_Filetab = NULL; #ifdef WITH_THREAD if (import_lock != NULL) { PyThread_free_lock(import_lock); @@ -379,14 +261,6 @@ _PyImport_Fini(void) #endif } -static void -imp_modules_reloading_clear(void) -{ - PyInterpreterState *interp = PyThreadState_Get()->interp; - if (interp->modules_reloading != NULL) - PyDict_Clear(interp->modules_reloading); -} - /* Helper for sys */ PyObject * @@ -423,7 +297,6 @@ void PyImport_Cleanup(void) { Py_ssize_t pos, ndone; - char *name; PyObject *key, *value, *dict; PyInterpreterState *interp = PyThreadState_GET()->interp; PyObject *modules = interp->modules; @@ -496,14 +369,13 @@ PyImport_Cleanup(void) if (value->ob_refcnt != 1) continue; if (PyUnicode_Check(key) && PyModule_Check(value)) { - name = _PyUnicode_AsString(key); - if (strcmp(name, "builtins") == 0) + if (PyUnicode_CompareWithASCIIString(key, "builtins") == 0) continue; - if (strcmp(name, "sys") == 0) + if (PyUnicode_CompareWithASCIIString(key, "sys") == 0) continue; if (Py_VerboseFlag) - PySys_WriteStderr( - "# cleanup[1] %s\n", name); + PySys_FormatStderr( + "# cleanup[1] %U\n", key); _PyModule_Clear(value); PyDict_SetItem(modules, key, Py_None); ndone++; @@ -515,13 +387,12 @@ PyImport_Cleanup(void) pos = 0; while (PyDict_Next(modules, &pos, &key, &value)) { if (PyUnicode_Check(key) && PyModule_Check(value)) { - name = _PyUnicode_AsString(key); - if (strcmp(name, "builtins") == 0) + if (PyUnicode_CompareWithASCIIString(key, "builtins") == 0) continue; - if (strcmp(name, "sys") == 0) + if (PyUnicode_CompareWithASCIIString(key, "sys") == 0) continue; if (Py_VerboseFlag) - PySys_WriteStderr("# cleanup[2] %s\n", name); + PySys_FormatStderr("# cleanup[2] %U\n", key); _PyModule_Clear(value); PyDict_SetItem(modules, key, Py_None); } @@ -547,7 +418,6 @@ PyImport_Cleanup(void) PyDict_Clear(modules); interp->modules = NULL; Py_DECREF(modules); - Py_CLEAR(interp->modules_reloading); } @@ -556,25 +426,36 @@ PyImport_Cleanup(void) long PyImport_GetMagicNumber(void) { - return pyc_magic; + 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 pyc_tag; + 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_FixupExtensionUnicode() + dictionary is stored by calling _PyImport_FixupExtensionObject() immediately after the module initialization function succeeds. A copy can be retrieved from there by calling - _PyImport_FindExtensionUnicode(). + _PyImport_FindExtensionObject(). Modules which do support multiple initialization set their m_size field to a non-negative number (indicating the size of the @@ -583,7 +464,8 @@ PyImport_GetMagicTag(void) */ int -_PyImport_FixupExtensionUnicode(PyObject *mod, char *name, PyObject *filename) +_PyImport_FixupExtensionObject(PyObject *mod, PyObject *name, + PyObject *filename) { PyObject *modules, *dict; struct PyModuleDef *def; @@ -602,10 +484,10 @@ _PyImport_FixupExtensionUnicode(PyObject *mod, char *name, PyObject *filename) return -1; } modules = PyImport_GetModuleDict(); - if (PyDict_SetItemString(modules, name, mod) < 0) + if (PyDict_SetItem(modules, name, mod) < 0) return -1; if (_PyState_AddModule(mod, def) < 0) { - PyDict_DelItemString(modules, name); + PyDict_DelItem(modules, name); return -1; } if (def->m_size == -1) { @@ -631,17 +513,17 @@ int _PyImport_FixupBuiltin(PyObject *mod, char *name) { int res; - PyObject *filename; - filename = PyUnicode_FromString(name); - if (filename == NULL) + PyObject *nameobj; + nameobj = PyUnicode_InternFromString(name); + if (nameobj == NULL) return -1; - res = _PyImport_FixupExtensionUnicode(mod, name, filename); - Py_DECREF(filename); + res = _PyImport_FixupExtensionObject(mod, nameobj, nameobj); + Py_DECREF(nameobj); return res; } PyObject * -_PyImport_FindExtensionUnicode(char *name, PyObject *filename) +_PyImport_FindExtensionObject(PyObject *name, PyObject *filename) { PyObject *mod, *mdict; PyModuleDef* def; @@ -654,7 +536,7 @@ _PyImport_FindExtensionUnicode(char *name, PyObject *filename) /* Module does not support repeated initialization */ if (def->m_base.m_copy == NULL) return NULL; - mod = PyImport_AddModule(name); + mod = PyImport_AddModuleObject(name); if (mod == NULL) return NULL; mdict = PyModule_GetDict(mod); @@ -669,30 +551,30 @@ _PyImport_FindExtensionUnicode(char *name, PyObject *filename) mod = def->m_base.m_init(); if (mod == NULL) return NULL; - PyDict_SetItemString(PyImport_GetModuleDict(), name, mod); + PyDict_SetItem(PyImport_GetModuleDict(), name, mod); Py_DECREF(mod); } if (_PyState_AddModule(mod, def) < 0) { - PyDict_DelItemString(PyImport_GetModuleDict(), name); + PyDict_DelItem(PyImport_GetModuleDict(), name); Py_DECREF(mod); return NULL; } if (Py_VerboseFlag) - PySys_FormatStderr("import %s # previously loaded (%U)\n", + PySys_FormatStderr("import %U # previously loaded (%R)\n", name, filename); return mod; } PyObject * -_PyImport_FindBuiltin(char *name) +_PyImport_FindBuiltin(const char *name) { - PyObject *res, *filename; - filename = PyUnicode_FromString(name); - if (filename == NULL) + PyObject *res, *nameobj; + nameobj = PyUnicode_InternFromString(name); + if (nameobj == NULL) return NULL; - res = _PyImport_FindExtensionUnicode(name, filename); - Py_DECREF(filename); + res = _PyImport_FindExtensionObject(nameobj, nameobj); + Py_DECREF(nameobj); return res; } @@ -703,18 +585,18 @@ _PyImport_FindBuiltin(char *name) 'NEW' REFERENCE! */ PyObject * -PyImport_AddModule(const char *name) +PyImport_AddModuleObject(PyObject *name) { PyObject *modules = PyImport_GetModuleDict(); PyObject *m; - if ((m = PyDict_GetItemString(modules, name)) != NULL && + if ((m = PyDict_GetItem(modules, name)) != NULL && PyModule_Check(m)) return m; - m = PyModule_New(name); + m = PyModule_NewObject(name); if (m == NULL) return NULL; - if (PyDict_SetItemString(modules, name, m) != 0) { + if (PyDict_SetItem(modules, name, m) != 0) { Py_DECREF(m); return NULL; } @@ -723,22 +605,31 @@ PyImport_AddModule(const char *name) 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(const char *name) +remove_module(PyObject *name) { PyObject *modules = PyImport_GetModuleDict(); - if (PyDict_GetItemString(modules, name) == NULL) + if (PyDict_GetItem(modules, name) == NULL) return; - if (PyDict_DelItemString(modules, name) < 0) + if (PyDict_DelItem(modules, name) < 0) Py_FatalError("import: deleting existing key in" "sys.modules failed"); } -static PyObject * get_sourcefile(char *file); -static char *make_source_pathname(char *pathname, char *buf); -static char *make_compiled_pathname(char *pathname, char *buf, size_t buflen, - int debug); /* Execute a code object in a module and return the module object * WITH INCREMENTED REFERENCE COUNT. If an error occurs, name is @@ -768,10 +659,60 @@ 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_AddModule(name); + m = PyImport_AddModuleObject(name); if (m == NULL) return NULL; /* If the module is being reloaded, we get the old module back @@ -782,43 +723,33 @@ PyImport_ExecCodeModuleWithPathnames(char *name, PyObject *co, char *pathname, PyEval_GetBuiltins()) != 0) goto error; } - /* Remember the filename as the __file__ attribute */ - v = NULL; if (pathname != NULL) { - v = get_sourcefile(pathname); - if (v == NULL) - PyErr_Clear(); + v = pathname; } - if (v == NULL) { + else { v = ((PyCodeObject *)co)->co_filename; - Py_INCREF(v); } + 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 = Py_None; - Py_INCREF(v); - } - else if ((v = PyUnicode_FromString(cpathname)) == NULL) { - PyErr_Clear(); /* Not important enough to report */ + if (cpathname != NULL) + v = cpathname; + else v = Py_None; - Py_INCREF(v); - } if (PyDict_SetItemString(d, "__cached__", v) != 0) PyErr_Clear(); /* Not important enough to report */ - Py_DECREF(v); v = PyEval_EvalCode(co, d, d); if (v == NULL) goto error; Py_DECREF(v); - if ((m = PyDict_GetItemString(modules, name)) == NULL) { + if ((m = PyDict_GetItem(modules, name)) == NULL) { PyErr_Format(PyExc_ImportError, - "Loaded module %.200s not found in sys.modules", + "Loaded module %R not found in sys.modules", name); return NULL; } @@ -833,409 +764,6 @@ PyImport_ExecCodeModuleWithPathnames(char *name, PyObject *co, char *pathname, } -/* Like strrchr(string, '/') but searches for the rightmost of either SEP - or ALTSEP, if the latter is defined. -*/ -static char * -rightmost_sep(char *s) -{ - char *found, c; - for (found = NULL; (c = *s); s++) { - if (c == SEP -#ifdef ALTSEP - || c == ALTSEP -#endif - ) - { - found = s; - } - } - return found; -} - - -/* Given a pathname for a Python source file, fill a buffer with the - pathname for the corresponding compiled file. Return the pathname - for the compiled file, or NULL if there's no space in the buffer. - Doesn't set an exception. */ - -static char * -make_compiled_pathname(char *pathname, char *buf, size_t buflen, int debug) -{ - /* foo.py -> __pycache__/foo.<tag>.pyc */ - size_t len = strlen(pathname); - size_t i, save; - char *pos; - int sep = SEP; - - /* Sanity check that the buffer has roughly enough space to hold what - will eventually be the full path to the compiled file. The 5 extra - bytes include the slash afer __pycache__, the two extra dots, the - extra trailing character ('c' or 'o') and null. This isn't exact - because the contents of the buffer can affect how many actual - characters of the string get into the buffer. We'll do a final - sanity check before writing the extension to ensure we do not - overflow the buffer. - */ - if (len + strlen(CACHEDIR) + strlen(pyc_tag) + 5 > buflen) - return NULL; - - /* Find the last path separator and copy everything from the start of - the source string up to and including the separator. - */ - if ((pos = rightmost_sep(pathname)) == NULL) { - i = 0; - } - else { - sep = *pos; - i = pos - pathname + 1; - strncpy(buf, pathname, i); - } - - save = i; - buf[i++] = '\0'; - /* Add __pycache__/ */ - strcat(buf, CACHEDIR); - i += strlen(CACHEDIR) - 1; - buf[i++] = sep; - buf[i++] = '\0'; - /* Add the base filename, but remove the .py or .pyw extension, since - the tag name must go before the extension. - */ - strcat(buf, pathname + save); - if ((pos = strrchr(buf, '.')) != NULL) - *++pos = '\0'; - strcat(buf, pyc_tag); - /* The length test above assumes that we're only adding one character - to the end of what would normally be the extension. What if there - is no extension, or the string ends in '.' or '.p', and otherwise - fills the buffer? By appending 4 more characters onto the string - here, we could overrun the buffer. - - As a simple example, let's say buflen=32 and the input string is - 'xxx.py'. strlen() would be 6 and the test above would yield: - - (6 + 11 + 10 + 5 == 32) > 32 - - which is false and so the name mangling would continue. This would - be fine because we'd end up with this string in buf: - - __pycache__/xxx.cpython-32.pyc\0 - - strlen(of that) == 30 + the nul fits inside a 32 character buffer. - We can even handle an input string of say 'xxxxx' above because - that's (5 + 11 + 10 + 5 == 31) > 32 which is also false. Name - mangling that yields: - - __pycache__/xxxxxcpython-32.pyc\0 - - which is 32 characters including the nul, and thus fits in the - buffer. However, an input string of 'xxxxxx' would yield a result - string of: - - __pycache__/xxxxxxcpython-32.pyc\0 - - which is 33 characters long (including the nul), thus overflowing - the buffer, even though the first test would fail, i.e.: the input - string is also 6 characters long, so 32 > 32 is false. - - The reason the first test fails but we still overflow the buffer is - that the test above only expects to add one extra character to be - added to the extension, and here we're adding three (pyc). We - don't add the first dot, so that reclaims one of expected - positions, leaving us overflowing by 1 byte (3 extra - 1 reclaimed - dot - 1 expected extra == 1 overflowed). - - The best we can do is ensure that we still have enough room in the - target buffer before we write the extension. Because it's always - only the extension that can cause the overflow, and never the other - path bytes we've written, it's sufficient to just do one more test - here. Still, the assertion that follows can't hurt. - */ -#if 0 - printf("strlen(buf): %d; buflen: %d\n", (int)strlen(buf), (int)buflen); -#endif - if (strlen(buf) + 5 > buflen) - return NULL; - strcat(buf, debug ? ".pyc" : ".pyo"); - assert(strlen(buf) < buflen); - return buf; -} - - -/* Given a pathname to a Python byte compiled file, return the path to the - source file, if the path matches the PEP 3147 format. This does not check - for any file existence, however, if the pyc file name does not match PEP - 3147 style, NULL is returned. buf must be at least as big as pathname; - the resulting path will always be shorter. */ - -static char * -make_source_pathname(char *pathname, char *buf) -{ - /* __pycache__/foo.<tag>.pyc -> foo.py */ - size_t i, j; - char *left, *right, *dot0, *dot1, sep; - - /* Look back two slashes from the end. In between these two slashes - must be the string __pycache__ or this is not a PEP 3147 style - path. It's possible for there to be only one slash. - */ - if ((right = rightmost_sep(pathname)) == NULL) - return NULL; - sep = *right; - *right = '\0'; - left = rightmost_sep(pathname); - *right = sep; - if (left == NULL) - left = pathname; - else - left++; - if (right-left != strlen(CACHEDIR) || - strncmp(left, CACHEDIR, right-left) != 0) - return NULL; - - /* Now verify that the path component to the right of the last slash - has two dots in it. - */ - if ((dot0 = strchr(right + 1, '.')) == NULL) - return NULL; - if ((dot1 = strchr(dot0 + 1, '.')) == NULL) - return NULL; - /* Too many dots? */ - if (strchr(dot1 + 1, '.') != NULL) - return NULL; - - /* This is a PEP 3147 path. Start by copying everything from the - start of pathname up to and including the leftmost slash. Then - copy the file's basename, removing the magic tag and adding a .py - suffix. - */ - strncpy(buf, pathname, (i=left-pathname)); - strncpy(buf+i, right+1, (j=dot0-right)); - strcpy(buf+i+j, "py"); - return buf; -} - -/* Given a pathname for a Python source file, its time of last - modification, and a pathname for a compiled file, check whether the - compiled file represents the same version of the source. If so, - return a FILE pointer for the compiled file, positioned just after - the header; if not, return NULL. - Doesn't set an exception. */ - -static FILE * -check_compiled_module(char *pathname, time_t mtime, char *cpathname) -{ - FILE *fp; - long magic; - long pyc_mtime; - - fp = fopen(cpathname, "rb"); - if (fp == NULL) - return NULL; - magic = PyMarshal_ReadLongFromFile(fp); - if (magic != pyc_magic) { - if (Py_VerboseFlag) - PySys_WriteStderr("# %s has bad magic\n", cpathname); - fclose(fp); - return NULL; - } - pyc_mtime = PyMarshal_ReadLongFromFile(fp); - if (pyc_mtime != mtime) { - if (Py_VerboseFlag) - PySys_WriteStderr("# %s has bad mtime\n", cpathname); - fclose(fp); - return NULL; - } - if (Py_VerboseFlag) - PySys_WriteStderr("# %s matches %s\n", cpathname, pathname); - return fp; -} - - -/* Read a code object from a file and check it for validity */ - -static PyCodeObject * -read_compiled_module(char *cpathname, FILE *fp) -{ - PyObject *co; - - co = PyMarshal_ReadLastObjectFromFile(fp); - if (co == NULL) - return NULL; - if (!PyCode_Check(co)) { - PyErr_Format(PyExc_ImportError, - "Non-code object in %.200s", cpathname); - Py_DECREF(co); - return NULL; - } - return (PyCodeObject *)co; -} - - -/* Load a module from a compiled file, execute it, and return its - module object WITH INCREMENTED REFERENCE COUNT */ - -static PyObject * -load_compiled_module(char *name, char *cpathname, FILE *fp) -{ - long magic; - PyCodeObject *co; - PyObject *m; - - magic = PyMarshal_ReadLongFromFile(fp); - if (magic != pyc_magic) { - PyErr_Format(PyExc_ImportError, - "Bad magic number in %.200s", cpathname); - return NULL; - } - (void) PyMarshal_ReadLongFromFile(fp); - co = read_compiled_module(cpathname, fp); - if (co == NULL) - return NULL; - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # precompiled from %s\n", - name, cpathname); - m = PyImport_ExecCodeModuleWithPathnames( - name, (PyObject *)co, cpathname, cpathname); - Py_DECREF(co); - - return m; -} - -/* Parse a source file and return the corresponding code object */ - -static PyCodeObject * -parse_source_module(const char *pathname, FILE *fp) -{ - PyCodeObject *co = NULL; - mod_ty mod; - PyCompilerFlags flags; - PyArena *arena = PyArena_New(); - if (arena == NULL) - return NULL; - - flags.cf_flags = 0; - mod = PyParser_ASTFromFile(fp, pathname, NULL, - Py_file_input, 0, 0, &flags, - NULL, arena); - if (mod) { - co = PyAST_Compile(mod, pathname, NULL, arena); - } - PyArena_Free(arena); - return co; -} - - -/* Helper to open a bytecode file for writing in exclusive mode */ - -static FILE * -open_exclusive(char *filename, mode_t mode) -{ -#if defined(O_EXCL)&&defined(O_CREAT)&&defined(O_WRONLY)&&defined(O_TRUNC) - /* Use O_EXCL to avoid a race condition when another process tries to - write the same file. When that happens, our open() call fails, - which is just fine (since it's only a cache). - XXX If the file exists and is writable but the directory is not - writable, the file will never be written. Oh well. - */ - int fd; - (void) unlink(filename); - fd = open(filename, O_EXCL|O_CREAT|O_WRONLY|O_TRUNC -#ifdef O_BINARY - |O_BINARY /* necessary for Windows */ -#endif -#ifdef __VMS - , mode, "ctxt=bin", "shr=nil" -#else - , mode -#endif - ); - if (fd < 0) - return NULL; - return fdopen(fd, "wb"); -#else - /* Best we can do -- on Windows this can't happen anyway */ - return fopen(filename, "wb"); -#endif -} - - -/* Write a compiled module to a file, placing the time of last - modification of its source into the header. - Errors are ignored, if a write error occurs an attempt is made to - remove the file. */ - -static void -write_compiled_module(PyCodeObject *co, char *cpathname, struct stat *srcstat) -{ - FILE *fp; - char *dirpath; - time_t mtime = srcstat->st_mtime; -#ifdef MS_WINDOWS /* since Windows uses different permissions */ - mode_t mode = srcstat->st_mode & ~S_IEXEC; -#else - mode_t mode = srcstat->st_mode & ~S_IXUSR & ~S_IXGRP & ~S_IXOTH; - mode_t dirmode = (srcstat->st_mode | - S_IXUSR | S_IXGRP | S_IXOTH | - S_IWUSR | S_IWGRP | S_IWOTH); -#endif - int saved; - - /* Ensure that the __pycache__ directory exists. */ - dirpath = rightmost_sep(cpathname); - if (dirpath == NULL) { - if (Py_VerboseFlag) - PySys_WriteStderr( - "# no %s path found %s\n", - CACHEDIR, cpathname); - return; - } - saved = *dirpath; - *dirpath = '\0'; - -#ifdef MS_WINDOWS - if (_mkdir(cpathname) < 0 && errno != EEXIST) { -#else - if (mkdir(cpathname, dirmode) < 0 && errno != EEXIST) { -#endif - *dirpath = saved; - if (Py_VerboseFlag) - PySys_WriteStderr( - "# cannot create cache dir %s\n", cpathname); - return; - } - *dirpath = saved; - - fp = open_exclusive(cpathname, mode); - if (fp == NULL) { - if (Py_VerboseFlag) - PySys_WriteStderr( - "# can't create %s\n", cpathname); - return; - } - PyMarshal_WriteLongToFile(pyc_magic, fp, Py_MARSHAL_VERSION); - /* First write a 0 for mtime */ - PyMarshal_WriteLongToFile(0L, fp, Py_MARSHAL_VERSION); - PyMarshal_WriteObjectToFile((PyObject *)co, fp, Py_MARSHAL_VERSION); - if (fflush(fp) != 0 || ferror(fp)) { - if (Py_VerboseFlag) - PySys_WriteStderr("# can't write %s\n", cpathname); - /* Don't keep partial file */ - fclose(fp); - (void) unlink(cpathname); - return; - } - /* Now write the true mtime (as a 32-bit field) */ - fseek(fp, 4L, 0); - assert(mtime <= 0xFFFFFFFF); - PyMarshal_WriteLongToFile((long)mtime, fp, Py_MARSHAL_VERSION); - fflush(fp); - fclose(fp); - if (Py_VerboseFlag) - PySys_WriteStderr("# wrote %s\n", cpathname); -} - static void update_code_filenames(PyCodeObject *co, PyObject *oldname, PyObject *newname) { @@ -1260,224 +788,60 @@ update_code_filenames(PyCodeObject *co, PyObject *oldname, PyObject *newname) } } -static int -update_compiled_module(PyCodeObject *co, char *pathname) +static void +update_compiled_module(PyCodeObject *co, PyObject *newname) { - PyObject *oldname, *newname; + PyObject *oldname; - newname = PyUnicode_DecodeFSDefault(pathname); - if (newname == NULL) - return -1; - - if (!PyUnicode_Compare(co->co_filename, newname)) { - Py_DECREF(newname); - return 0; - } + 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); - Py_DECREF(newname); - return 1; } -/* Load a source module from a given file and return its module - object WITH INCREMENTED REFERENCE COUNT. If there's a matching - byte-compiled file, use that instead. */ - static PyObject * -load_source_module(char *name, char *pathname, FILE *fp) +imp_fix_co_filename(PyObject *self, PyObject *args) { - struct stat st; - FILE *fpc; - char *buf; - char *cpathname; - PyCodeObject *co = NULL; - PyObject *m; + PyObject *co; + PyObject *file_path; - if (fstat(fileno(fp), &st) != 0) { - PyErr_Format(PyExc_RuntimeError, - "unable to get file status from '%s'", - pathname); + if (!PyArg_ParseTuple(args, "OO:_fix_co_filename", &co, &file_path)) return NULL; - } - if (sizeof st.st_mtime > 4) { - /* Python's .pyc timestamp handling presumes that the timestamp fits - in 4 bytes. Since the code only does an equality comparison, - ordering is not important and we can safely ignore the higher bits - (collisions are extremely unlikely). - */ - st.st_mtime &= 0xFFFFFFFF; - } - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - return PyErr_NoMemory(); - } - cpathname = make_compiled_pathname( - pathname, buf, (size_t)MAXPATHLEN + 1, !Py_OptimizeFlag); - if (cpathname != NULL && - (fpc = check_compiled_module(pathname, st.st_mtime, cpathname))) { - co = read_compiled_module(cpathname, fpc); - fclose(fpc); - if (co == NULL) - goto error_exit; - if (update_compiled_module(co, pathname) < 0) - goto error_exit; - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # precompiled from %s\n", - name, cpathname); - pathname = cpathname; - } - else { - co = parse_source_module(pathname, fp); - if (co == NULL) - goto error_exit; - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # from %s\n", - name, pathname); - if (cpathname) { - PyObject *ro = PySys_GetObject("dont_write_bytecode"); - if (ro == NULL || !PyObject_IsTrue(ro)) - write_compiled_module(co, cpathname, &st); - } - } - m = PyImport_ExecCodeModuleWithPathnames( - name, (PyObject *)co, pathname, cpathname); - Py_DECREF(co); - PyMem_FREE(buf); - return m; - -error_exit: - Py_XDECREF(co); - PyMem_FREE(buf); - return NULL; -} - -/* Get source file -> unicode or None - * Returns the path to the py file if available, else the given path - */ -static PyObject * -get_sourcefile(char *file) -{ - char *py = NULL; - Py_ssize_t len; - PyObject *u; - struct stat statbuf; - - if (!file || !*file) { - Py_RETURN_NONE; + if (!PyCode_Check(co)) { + PyErr_SetString(PyExc_TypeError, + "first argument must be a code object"); + return NULL; } - len = strlen(file); - /* match '*.py?' */ - if (len > MAXPATHLEN || PyOS_strnicmp(&file[len-4], ".py", 3) != 0) { - return PyUnicode_DecodeFSDefault(file); + if (!PyUnicode_Check(file_path)) { + PyErr_SetString(PyExc_TypeError, + "second argument must be a string"); + return NULL; } - py = PyMem_MALLOC(MAXPATHLEN+1); - if (py == NULL) { - return PyErr_NoMemory(); - } - /* Start by trying to turn PEP 3147 path into source path. If that - * fails, just chop off the trailing character, i.e. legacy pyc path - * to py. - */ - if (make_source_pathname(file, py) == NULL) { - strncpy(py, file, len-1); - py[len-1] = '\0'; - } + update_compiled_module((PyCodeObject*)co, file_path); - if (stat(py, &statbuf) == 0 && - S_ISREG(statbuf.st_mode)) { - u = PyUnicode_DecodeFSDefault(py); - } - else { - u = PyUnicode_DecodeFSDefault(file); - } - PyMem_FREE(py); - return u; + Py_RETURN_NONE; } -/* Forward */ -static PyObject *load_module(char *, FILE *, char *, int, PyObject *); -static struct filedescr *find_module(char *, char *, PyObject *, - char *, size_t, FILE **, PyObject **); -static struct _frozen * find_frozen(char *); - -/* Load a package and return its module object WITH INCREMENTED - REFERENCE COUNT */ -static PyObject * -load_package(char *name, char *pathname) -{ - PyObject *m, *d; - PyObject *file = NULL; - PyObject *path = NULL; - int err; - char *buf = NULL; - FILE *fp = NULL; - struct filedescr *fdp; - - m = PyImport_AddModule(name); - if (m == NULL) - return NULL; - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # directory %s\n", - name, pathname); - d = PyModule_GetDict(m); - file = get_sourcefile(pathname); - if (file == NULL) - goto error; - path = Py_BuildValue("[O]", file); - if (path == NULL) - goto error; - err = PyDict_SetItemString(d, "__file__", file); - if (err == 0) - err = PyDict_SetItemString(d, "__path__", path); - if (err != 0) - goto error; - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - PyErr_NoMemory(); - goto error; - } - buf[0] = '\0'; - fdp = find_module(name, "__init__", path, buf, MAXPATHLEN+1, &fp, NULL); - if (fdp == NULL) { - if (PyErr_ExceptionMatches(PyExc_ImportError)) { - PyErr_Clear(); - Py_INCREF(m); - } - else - m = NULL; - goto cleanup; - } - m = load_module(name, fp, buf, fdp->type, NULL); - if (fp != NULL) - fclose(fp); - goto cleanup; - - error: - m = NULL; - cleanup: - if (buf) - PyMem_FREE(buf); - Py_XDECREF(path); - Py_XDECREF(file); - return m; -} +/* Forward */ +static struct _frozen * find_frozen(PyObject *); /* Helper to test for built-in module */ static int -is_builtin(char *name) +is_builtin(PyObject *name) { - int i; + int i, cmp; for (i = 0; PyImport_Inittab[i].name != NULL; i++) { - if (strcmp(name, PyImport_Inittab[i].name) == 0) { + cmp = PyUnicode_CompareWithASCIIString(name, PyImport_Inittab[i].name); + if (cmp == 0) { if (PyImport_Inittab[i].initfunc == NULL) return -1; else @@ -1533,15 +897,7 @@ get_path_importer(PyObject *path_importer_cache, PyObject *path_hooks, PyErr_Clear(); } if (importer == NULL) { - importer = PyObject_CallFunctionObjArgs( - (PyObject *)&PyNullImporter_Type, p, NULL - ); - if (importer == NULL) { - if (PyErr_ExceptionMatches(PyExc_ImportError)) { - PyErr_Clear(); - return Py_None; - } - } + return Py_None; } if (importer != NULL) { int err = PyDict_SetItem(path_importer_cache, p, importer); @@ -1566,661 +922,38 @@ PyImport_GetImporter(PyObject *path) { return importer; } -/* Search the path (default sys.path) for a module. Return the - corresponding filedescr struct, and (via return arguments) the - pathname and an open file. Return NULL if the module is not found. */ - -#ifdef MS_COREDLL -extern FILE *PyWin_FindRegisteredModule(const char *, struct filedescr **, - char *, Py_ssize_t); -#endif - -static int case_ok(char *, Py_ssize_t, Py_ssize_t, char *); -static int find_init_module(char *); /* Forward */ -static struct filedescr importhookdescr = {"", "", IMP_HOOK}; - -static struct filedescr * -find_module(char *fullname, char *subname, PyObject *path, char *buf, - size_t buflen, FILE **p_fp, PyObject **p_loader) -{ - Py_ssize_t i, npath; - size_t len, namelen; - struct filedescr *fdp = NULL; - char *filemode; - FILE *fp = NULL; - PyObject *path_hooks, *path_importer_cache; - struct stat statbuf; - static struct filedescr fd_frozen = {"", "", PY_FROZEN}; - static struct filedescr fd_builtin = {"", "", C_BUILTIN}; - static struct filedescr fd_package = {"", "", PKG_DIRECTORY}; - char *name; -#if defined(PYOS_OS2) - size_t saved_len; - size_t saved_namelen; - char *saved_buf = NULL; -#endif - if (p_loader != NULL) - *p_loader = NULL; - - if (strlen(subname) > MAXPATHLEN) { - PyErr_SetString(PyExc_OverflowError, - "module name is too long"); - return NULL; - } - name = PyMem_MALLOC(MAXPATHLEN+1); - if (name == NULL) { - PyErr_NoMemory(); - return NULL; - } - strcpy(name, subname); - - /* sys.meta_path import hook */ - if (p_loader != NULL) { - PyObject *meta_path; - - meta_path = PySys_GetObject("meta_path"); - if (meta_path == NULL || !PyList_Check(meta_path)) { - PyErr_SetString(PyExc_RuntimeError, - "sys.meta_path must be a list of " - "import hooks"); - goto error_exit; - } - Py_INCREF(meta_path); /* zap guard */ - npath = PyList_Size(meta_path); - for (i = 0; i < npath; i++) { - PyObject *loader; - PyObject *hook = PyList_GetItem(meta_path, i); - loader = PyObject_CallMethod(hook, "find_module", - "sO", fullname, - path != NULL ? - path : Py_None); - if (loader == NULL) { - Py_DECREF(meta_path); - goto error_exit; /* true error */ - } - if (loader != Py_None) { - /* a loader was found */ - *p_loader = loader; - Py_DECREF(meta_path); - PyMem_FREE(name); - return &importhookdescr; - } - Py_DECREF(loader); - } - Py_DECREF(meta_path); - } - - if (find_frozen(fullname) != NULL) { - strcpy(buf, fullname); - PyMem_FREE(name); - return &fd_frozen; - } - - if (path == NULL) { - if (is_builtin(name)) { - strcpy(buf, name); - PyMem_FREE(name); - return &fd_builtin; - } -#ifdef MS_COREDLL - fp = PyWin_FindRegisteredModule(name, &fdp, buf, buflen); - if (fp != NULL) { - *p_fp = fp; - PyMem_FREE(name); - return fdp; - } -#endif - path = PySys_GetObject("path"); - } - - if (path == NULL || !PyList_Check(path)) { - PyErr_SetString(PyExc_RuntimeError, - "sys.path must be a list of directory names"); - goto error_exit; - } - - path_hooks = PySys_GetObject("path_hooks"); - if (path_hooks == NULL || !PyList_Check(path_hooks)) { - PyErr_SetString(PyExc_RuntimeError, - "sys.path_hooks must be a list of " - "import hooks"); - goto error_exit; - } - path_importer_cache = PySys_GetObject("path_importer_cache"); - if (path_importer_cache == NULL || - !PyDict_Check(path_importer_cache)) { - PyErr_SetString(PyExc_RuntimeError, - "sys.path_importer_cache must be a dict"); - goto error_exit; - } - - npath = PyList_Size(path); - namelen = strlen(name); - for (i = 0; i < npath; i++) { - PyObject *v = PyList_GetItem(path, i); - PyObject *origv = v; - const char *base; - Py_ssize_t size; - if (!v) - goto error_exit; - if (PyUnicode_Check(v)) { - v = PyUnicode_EncodeFSDefault(v); - if (v == NULL) - goto error_exit; - } - else if (!PyBytes_Check(v)) - continue; - else - Py_INCREF(v); - - base = PyBytes_AS_STRING(v); - size = PyBytes_GET_SIZE(v); - len = size; - if (len + 2 + namelen + MAXSUFFIXSIZE >= buflen) { - Py_DECREF(v); - continue; /* Too long */ - } - strcpy(buf, base); - Py_DECREF(v); - - if (strlen(buf) != len) { - continue; /* v contains '\0' */ - } - - /* sys.path_hooks import hook */ - if (p_loader != NULL) { - PyObject *importer; - - importer = get_path_importer(path_importer_cache, - path_hooks, origv); - if (importer == NULL) { - goto error_exit; - } - /* Note: importer is a borrowed reference */ - if (importer != Py_None) { - PyObject *loader; - loader = PyObject_CallMethod(importer, - "find_module", - "s", fullname); - if (loader == NULL) - goto error_exit; /* error */ - if (loader != Py_None) { - /* a loader was found */ - *p_loader = loader; - PyMem_FREE(name); - return &importhookdescr; - } - Py_DECREF(loader); - continue; - } - } - /* no hook was found, use builtin import */ - - if (len > 0 && buf[len-1] != SEP -#ifdef ALTSEP - && buf[len-1] != ALTSEP -#endif - ) - buf[len++] = SEP; - strcpy(buf+len, name); - len += namelen; - - /* Check for package import (buf holds a directory name, - and there's an __init__ module in that directory */ -#ifdef HAVE_STAT - if (stat(buf, &statbuf) == 0 && /* it exists */ - S_ISDIR(statbuf.st_mode) && /* it's a directory */ - case_ok(buf, len, namelen, name)) { /* case matches */ - if (find_init_module(buf)) { /* and has __init__.py */ - PyMem_FREE(name); - return &fd_package; - } - else { - int err; - PyObject *unicode = PyUnicode_DecodeFSDefault(buf); - if (unicode == NULL) - goto error_exit; - err = PyErr_WarnFormat(PyExc_ImportWarning, 1, - "Not importing directory '%U': missing __init__.py", - unicode); - Py_DECREF(unicode); - if (err) - goto error_exit; - } - } -#endif -#if defined(PYOS_OS2) - /* take a snapshot of the module spec for restoration - * after the 8 character DLL hackery - */ - saved_buf = strdup(buf); - saved_len = len; - saved_namelen = namelen; -#endif /* PYOS_OS2 */ - for (fdp = _PyImport_Filetab; fdp->suffix != NULL; fdp++) { - struct stat statbuf; -#if defined(PYOS_OS2) && defined(HAVE_DYNAMIC_LOADING) - /* OS/2 limits DLLs to 8 character names (w/o - extension) - * so if the name is longer than that and its a - * dynamically loaded module we're going to try, - * truncate the name before trying - */ - if (strlen(subname) > 8) { - /* is this an attempt to load a C extension? */ - const struct filedescr *scan; - scan = _PyImport_DynLoadFiletab; - while (scan->suffix != NULL) { - if (!strcmp(scan->suffix, fdp->suffix)) - break; - else - scan++; - } - if (scan->suffix != NULL) { - /* yes, so truncate the name */ - namelen = 8; - len -= strlen(subname) - namelen; - buf[len] = '\0'; - } - } -#endif /* PYOS_OS2 */ - strcpy(buf+len, fdp->suffix); - if (Py_VerboseFlag > 1) - PySys_WriteStderr("# trying %s\n", buf); - - filemode = fdp->mode; - if (filemode[0] == 'U') - filemode = "r" PY_STDIOTEXTMODE; - - if (stat(buf, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) - /* it's a directory */ - fp = NULL; - else - fp = fopen(buf, filemode); - if (fp != NULL) { - if (case_ok(buf, len, namelen, name)) - break; - else { /* continue search */ - fclose(fp); - fp = NULL; - } - } -#if defined(PYOS_OS2) - /* restore the saved snapshot */ - strcpy(buf, saved_buf); - len = saved_len; - namelen = saved_namelen; -#endif - } -#if defined(PYOS_OS2) - /* don't need/want the module name snapshot anymore */ - if (saved_buf) - { - free(saved_buf); - saved_buf = NULL; - } -#endif - if (fp != NULL) - break; - } - if (fp == NULL) { - PyErr_Format(PyExc_ImportError, - "No module named %.200s", name); - goto error_exit; - } - *p_fp = fp; - PyMem_FREE(name); - return fdp; - -error_exit: - PyMem_FREE(name); - return NULL; -} - -/* case_ok(char* buf, Py_ssize_t len, Py_ssize_t namelen, char* name) - * The arguments here are tricky, best shown by example: - * /a/b/c/d/e/f/g/h/i/j/k/some_long_module_name.py\0 - * ^ ^ ^ ^ - * |--------------------- buf ---------------------| - * |------------------- len ------------------| - * |------ name -------| - * |----- namelen -----| - * buf is the full path, but len only counts up to (& exclusive of) the - * extension. name is the module name, also exclusive of extension. - * - * We've already done a successful stat() or fopen() on buf, so know that - * there's some match, possibly case-insensitive. - * - * case_ok() is to return 1 if there's a case-sensitive match for - * name, else 0. case_ok() is also to return 1 if envar PYTHONCASEOK - * exists. - * - * case_ok() is used to implement case-sensitive import semantics even - * on platforms with case-insensitive filesystems. It's trivial to implement - * for case-sensitive filesystems. It's pretty much a cross-platform - * nightmare for systems with case-insensitive filesystems. - */ - -/* First we may need a pile of platform-specific header files; the sequence - * of #if's here should match the sequence in the body of case_ok(). - */ -#if defined(MS_WINDOWS) -#include <windows.h> - -#elif defined(DJGPP) -#include <dir.h> - -#elif (defined(__MACH__) && defined(__APPLE__) || defined(__CYGWIN__)) && defined(HAVE_DIRENT_H) -#include <sys/types.h> -#include <dirent.h> - -#elif defined(PYOS_OS2) -#define INCL_DOS -#define INCL_DOSERRORS -#define INCL_NOPMAPI -#include <os2.h> -#endif - -static int -case_ok(char *buf, Py_ssize_t len, Py_ssize_t namelen, char *name) -{ -/* Pick a platform-specific implementation; the sequence of #if's here should - * match the sequence just above. - */ - -/* MS_WINDOWS */ -#if defined(MS_WINDOWS) - WIN32_FIND_DATA data; - HANDLE h; - - if (Py_GETENV("PYTHONCASEOK") != NULL) - return 1; - - h = FindFirstFile(buf, &data); - if (h == INVALID_HANDLE_VALUE) { - PyErr_Format(PyExc_NameError, - "Can't find file for module %.100s\n(filename %.300s)", - name, buf); - return 0; - } - FindClose(h); - return strncmp(data.cFileName, name, namelen) == 0; - -/* DJGPP */ -#elif defined(DJGPP) - struct ffblk ffblk; - int done; - - if (Py_GETENV("PYTHONCASEOK") != NULL) - return 1; - - done = findfirst(buf, &ffblk, FA_ARCH|FA_RDONLY|FA_HIDDEN|FA_DIREC); - if (done) { - PyErr_Format(PyExc_NameError, - "Can't find file for module %.100s\n(filename %.300s)", - name, buf); - return 0; - } - return strncmp(ffblk.ff_name, name, namelen) == 0; - -/* new-fangled macintosh (macosx) or Cygwin */ -#elif (defined(__MACH__) && defined(__APPLE__) || defined(__CYGWIN__)) && defined(HAVE_DIRENT_H) - DIR *dirp; - struct dirent *dp; - char dirname[MAXPATHLEN + 1]; - const int dirlen = len - namelen - 1; /* don't want trailing SEP */ - - if (Py_GETENV("PYTHONCASEOK") != NULL) - return 1; - - /* Copy the dir component into dirname; substitute "." if empty */ - if (dirlen <= 0) { - dirname[0] = '.'; - dirname[1] = '\0'; - } - else { - assert(dirlen <= MAXPATHLEN); - memcpy(dirname, buf, dirlen); - dirname[dirlen] = '\0'; - } - /* Open the directory and search the entries for an exact match. */ - dirp = opendir(dirname); - if (dirp) { - char *nameWithExt = buf + len - namelen; - while ((dp = readdir(dirp)) != NULL) { - const int thislen = -#ifdef _DIRENT_HAVE_D_NAMELEN - dp->d_namlen; -#else - strlen(dp->d_name); -#endif - if (thislen >= namelen && - strcmp(dp->d_name, nameWithExt) == 0) { - (void)closedir(dirp); - return 1; /* Found */ - } - } - (void)closedir(dirp); - } - return 0 ; /* Not found */ - -/* OS/2 */ -#elif defined(PYOS_OS2) - HDIR hdir = 1; - ULONG srchcnt = 1; - FILEFINDBUF3 ffbuf; - APIRET rc; - - if (Py_GETENV("PYTHONCASEOK") != NULL) - return 1; - - rc = DosFindFirst(buf, - &hdir, - FILE_READONLY | FILE_HIDDEN | FILE_SYSTEM | FILE_DIRECTORY, - &ffbuf, sizeof(ffbuf), - &srchcnt, - FIL_STANDARD); - if (rc != NO_ERROR) - return 0; - return strncmp(ffbuf.achName, name, namelen) == 0; - -/* assuming it's a case-sensitive filesystem, so there's nothing to do! */ -#else - return 1; - -#endif -} - -#ifdef HAVE_STAT - -/* Helper to look for __init__.py or __init__.py[co] in potential package */ -static int -find_init_module(char *buf) -{ - const size_t save_len = strlen(buf); - size_t i = save_len; - char *pname; /* pointer to start of __init__ */ - struct stat statbuf; - -/* For calling case_ok(buf, len, namelen, name): - * /a/b/c/d/e/f/g/h/i/j/k/some_long_module_name.py\0 - * ^ ^ ^ ^ - * |--------------------- buf ---------------------| - * |------------------- len ------------------| - * |------ name -------| - * |----- namelen -----| - */ - if (save_len + 13 >= MAXPATHLEN) - return 0; - buf[i++] = SEP; - pname = buf + i; - strcpy(pname, "__init__.py"); - if (stat(buf, &statbuf) == 0) { - if (case_ok(buf, - save_len + 9, /* len("/__init__") */ - 8, /* len("__init__") */ - pname)) { - buf[save_len] = '\0'; - return 1; - } - } - i += strlen(pname); - strcpy(buf+i, Py_OptimizeFlag ? "o" : "c"); - if (stat(buf, &statbuf) == 0) { - if (case_ok(buf, - save_len + 9, /* len("/__init__") */ - 8, /* len("__init__") */ - pname)) { - buf[save_len] = '\0'; - return 1; - } - } - buf[save_len] = '\0'; - return 0; -} - -#endif /* HAVE_STAT */ - - -static int init_builtin(char *); /* Forward */ - -static PyObject* -load_builtin(char *name, char *pathname, int type) -{ - PyObject *m, *modules; - int err; - - if (pathname != NULL && pathname[0] != '\0') - name = pathname; - - if (type == C_BUILTIN) - err = init_builtin(name); - else - err = PyImport_ImportFrozenModule(name); - if (err < 0) - return NULL; - if (err == 0) { - PyErr_Format(PyExc_ImportError, - "Purported %s module %.200s not found", - type == C_BUILTIN ? - "builtin" : "frozen", - name); - return NULL; - } - - modules = PyImport_GetModuleDict(); - m = PyDict_GetItemString(modules, name); - if (m == NULL) { - PyErr_Format( - PyExc_ImportError, - "%s module %.200s not properly initialized", - type == C_BUILTIN ? - "builtin" : "frozen", - name); - return NULL; - } - Py_INCREF(m); - return m; -} - -/* Load an external module using the default search path and return - its module object WITH INCREMENTED REFERENCE COUNT */ - -static PyObject * -load_module(char *name, FILE *fp, char *pathname, int type, PyObject *loader) -{ - PyObject *m; - - /* First check that there's an open file (if we need one) */ - switch (type) { - case PY_SOURCE: - case PY_COMPILED: - if (fp == NULL) { - PyErr_Format(PyExc_ValueError, - "file object required for import (type code %d)", - type); - return NULL; - } - } - - switch (type) { - - case PY_SOURCE: - m = load_source_module(name, pathname, fp); - break; - - case PY_COMPILED: - m = load_compiled_module(name, pathname, fp); - break; - -#ifdef HAVE_DYNAMIC_LOADING - case C_EXTENSION: - m = _PyImport_LoadDynamicModule(name, pathname, fp); - break; -#endif - - case PKG_DIRECTORY: - m = load_package(name, pathname); - break; - - case C_BUILTIN: - case PY_FROZEN: - m = load_builtin(name, pathname, type); - break; - - case IMP_HOOK: { - if (loader == NULL) { - PyErr_SetString(PyExc_ImportError, - "import hook without loader"); - return NULL; - } - m = PyObject_CallMethod(loader, "load_module", "s", name); - break; - } - - default: - PyErr_Format(PyExc_ImportError, - "Don't know how to import %.200s (type code %d)", - name, type); - m = NULL; - - } - - return m; -} +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(char *name) +init_builtin(PyObject *name) { struct _inittab *p; - if (_PyImport_FindBuiltin(name) != NULL) + if (_PyImport_FindExtensionObject(name, name) != NULL) return 1; for (p = PyImport_Inittab; p->name != NULL; p++) { PyObject *mod; PyModuleDef *def; - if (strcmp(name, p->name) == 0) { + if (PyUnicode_CompareWithASCIIString(name, p->name) == 0) { if (p->initfunc == NULL) { PyErr_Format(PyExc_ImportError, - "Cannot re-init internal module %.200s", + "Cannot re-init internal module %R", name); return -1; } - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # builtin\n", name); 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_FixupBuiltin(mod, name) < 0) + if (_PyImport_FixupExtensionObject(mod, name, name) < 0) return -1; /* FixupExtension has put the module into sys.modules, so we can release our own reference. */ @@ -2235,37 +968,37 @@ init_builtin(char *name) /* Frozen modules */ static struct _frozen * -find_frozen(char *name) +find_frozen(PyObject *name) { struct _frozen *p; - if (!name) + if (name == NULL) return NULL; for (p = PyImport_FrozenModules; ; p++) { if (p->name == NULL) return NULL; - if (strcmp(p->name, name) == 0) + if (PyUnicode_CompareWithASCIIString(name, p->name) == 0) break; } return p; } static PyObject * -get_frozen_object(char *name) +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 %.200s", + "No such frozen object named %R", name); return NULL; } if (p->code == NULL) { PyErr_Format(PyExc_ImportError, - "Excluded frozen object named %.200s", + "Excluded frozen object named %R", name); return NULL; } @@ -2276,14 +1009,14 @@ get_frozen_object(char *name) } static PyObject * -is_frozen_package(char *name) +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 %.200s", + "No such frozen object named %R", name); return NULL; } @@ -2303,19 +1036,20 @@ is_frozen_package(char *name) This function is also used from frozenmain.c */ int -PyImport_ImportFrozenModule(char *name) +PyImport_ImportFrozenModuleObject(PyObject *name) { - struct _frozen *p = find_frozen(name); - PyObject *co; - PyObject *m; + 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 %.200s", + "Excluded frozen object named %R", name); return -1; } @@ -2323,41 +1057,39 @@ PyImport_ImportFrozenModule(char *name) ispackage = (size < 0); if (ispackage) size = -size; - if (Py_VerboseFlag) - PySys_WriteStderr("import %s # frozen%s\n", - name, ispackage ? " package" : ""); co = PyMarshal_ReadObjectFromString((char *)p->code, size); if (co == NULL) return -1; if (!PyCode_Check(co)) { PyErr_Format(PyExc_TypeError, - "frozen object %.200s is not a code object", + "frozen object %R is not a code object", name); goto err_return; } if (ispackage) { /* Set __path__ to the package name */ - PyObject *d, *s, *l; + PyObject *d, *l; int err; - m = PyImport_AddModule(name); + m = PyImport_AddModuleObject(name); if (m == NULL) goto err_return; d = PyModule_GetDict(m); - s = PyUnicode_InternFromString(name); - if (s == NULL) - goto err_return; l = PyList_New(1); if (l == NULL) { - Py_DECREF(s); goto err_return; } - PyList_SET_ITEM(l, 0, s); + Py_INCREF(name); + PyList_SET_ITEM(l, 0, name); err = PyDict_SetItemString(d, "__path__", l); Py_DECREF(l); if (err != 0) goto err_return; } - m = PyImport_ExecCodeModuleEx(name, co, "<frozen>"); + 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); @@ -2368,6 +1100,19 @@ err_return: 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 */ @@ -2398,579 +1143,407 @@ PyImport_ImportModule(const char *name) PyObject * PyImport_ImportModuleNoBlock(const char *name) { - PyObject *result; - PyObject *modules; -#ifdef WITH_THREAD - long me; -#endif - - /* Try to get the module from sys.modules[name] */ - modules = PyImport_GetModuleDict(); - if (modules == NULL) - return NULL; - - result = PyDict_GetItemString(modules, name); - if (result != NULL) { - Py_INCREF(result); - return result; - } - else { - PyErr_Clear(); - } -#ifdef WITH_THREAD - /* check the import lock - * me might be -1 but I ignore the error here, the lock function - * takes care of the problem */ - me = PyThread_get_thread_ident(); - if (import_lock_thread == -1 || import_lock_thread == me) { - /* no thread or me is holding the lock */ - return PyImport_ImportModule(name); - } - else { - PyErr_Format(PyExc_ImportError, - "Failed to import %.200s because the import lock" - "is held by another thread.", - name); - return NULL; - } -#else return PyImport_ImportModule(name); -#endif } -/* Forward declarations for helper routines */ -static PyObject *get_parent(PyObject *globals, char *buf, - Py_ssize_t *p_buflen, int level); -static PyObject *load_next(PyObject *mod, PyObject *altmod, - char **p_name, char *buf, Py_ssize_t *p_buflen); -static int mark_miss(char *name); -static int ensure_fromlist(PyObject *mod, PyObject *fromlist, - char *buf, Py_ssize_t buflen, int recursive); -static PyObject * import_submodule(PyObject *mod, char *name, char *fullname); - -/* The Magnum Opus of dotted-name import :-) */ - -static PyObject * -import_module_level(char *name, PyObject *globals, PyObject *locals, - PyObject *fromlist, int level) -{ - char *buf; - Py_ssize_t buflen = 0; - PyObject *parent, *head, *next, *tail; - if (strchr(name, '/') != NULL -#ifdef MS_WINDOWS - || strchr(name, '\\') != NULL -#endif - ) { - PyErr_SetString(PyExc_ImportError, - "Import by filename is not supported."); - return NULL; +/* 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); +} - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - return PyErr_NoMemory(); - } - parent = get_parent(globals, buf, &buflen, level); - if (parent == NULL) - goto error_exit; - head = load_next(parent, level < 0 ? Py_None : parent, &name, buf, - &buflen); - if (head == NULL) - goto error_exit; +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; - tail = head; - Py_INCREF(tail); - while (name) { - next = load_next(tail, tail, &name, buf, &buflen); - Py_DECREF(tail); - if (next == NULL) { - Py_DECREF(head); - goto error_exit; + /* 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; } - tail = next; } - if (tail == Py_None) { - /* If tail is Py_None, both get_parent and load_next found - an empty module name: someone called __import__("") or - doctored faulty bytecode */ - Py_DECREF(tail); - Py_DECREF(head); - PyErr_SetString(PyExc_ValueError, - "Empty module name"); - goto error_exit; - } - - if (fromlist != NULL) { - if (fromlist == Py_None || !PyObject_IsTrue(fromlist)) - fromlist = NULL; + else { + /* Only have to care what given_globals is if it will be used + for something. */ + 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 (fromlist == NULL) { - Py_DECREF(tail); - PyMem_FREE(buf); - return head; + if (given_fromlist == NULL) { + fromlist = PyList_New(0); + if (fromlist == NULL) { + goto error; + } } - - Py_DECREF(head); - if (!ensure_fromlist(tail, fromlist, buf, buflen, 0)) { - Py_DECREF(tail); - goto error_exit; + else { + fromlist = given_fromlist; + Py_INCREF(fromlist); } - - PyMem_FREE(buf); - return tail; - -error_exit: - PyMem_FREE(buf); - return NULL; -} - -PyObject * -PyImport_ImportModuleLevel(char *name, PyObject *globals, PyObject *locals, - PyObject *fromlist, int level) -{ - PyObject *result; - _PyImport_AcquireLock(); - result = import_module_level(name, globals, locals, fromlist, level); - if (_PyImport_ReleaseLock() < 0) { - Py_XDECREF(result); - PyErr_SetString(PyExc_RuntimeError, - "not holding the import lock"); - return NULL; + if (name == NULL) { + PyErr_SetString(PyExc_ValueError, "Empty module name"); + goto error; } - return result; -} - -/* Return the package that an import is being performed in. If globals comes - from the module foo.bar.bat (not itself a package), this returns the - sys.modules entry for foo.bar. If globals is from a package's __init__.py, - the package's entry in sys.modules is returned, as a borrowed reference. - The *name* of the returned package is returned in buf, with the length of - the name in *p_buflen. + /* The below code is importlib.__import__() & _gcd_import(), ported to C + for added performance. */ - If globals doesn't come from a package or a module in a package, or a - corresponding entry is not found in sys.modules, Py_None is returned. -*/ -static PyObject * -get_parent(PyObject *globals, char *buf, Py_ssize_t *p_buflen, int level) -{ - static PyObject *namestr = NULL; - static PyObject *pathstr = NULL; - static PyObject *pkgstr = NULL; - PyObject *pkgname, *modname, *modpath, *modules, *parent; - int orig_level = level; - - if (globals == NULL || !PyDict_Check(globals) || !level) - return Py_None; - - if (namestr == NULL) { - namestr = PyUnicode_InternFromString("__name__"); - if (namestr == NULL) - return NULL; + if (!PyUnicode_Check(name)) { + PyErr_SetString(PyExc_TypeError, "module name must be a string"); + goto error; } - if (pathstr == NULL) { - pathstr = PyUnicode_InternFromString("__path__"); - if (pathstr == NULL) - return NULL; + else if (PyUnicode_READY(name) < 0) { + goto error; } - if (pkgstr == NULL) { - pkgstr = PyUnicode_InternFromString("__package__"); - if (pkgstr == NULL) - return NULL; + if (level < 0) { + PyErr_SetString(PyExc_ValueError, "level must be >= 0"); + goto error; } - - *buf = '\0'; - *p_buflen = 0; - pkgname = PyDict_GetItem(globals, pkgstr); - - if ((pkgname != NULL) && (pkgname != Py_None)) { - /* __package__ is set, so use it */ - char *pkgname_str; - Py_ssize_t len; - - if (!PyUnicode_Check(pkgname)) { - PyErr_SetString(PyExc_ValueError, - "__package__ set to non-string"); - return NULL; - } - pkgname_str = _PyUnicode_AsStringAndSize(pkgname, &len); - if (len == 0) { - if (level > 0) { - PyErr_SetString(PyExc_ValueError, - "Attempted relative import in non-package"); - return NULL; + 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; } - return Py_None; - } - if (len > MAXPATHLEN) { - PyErr_SetString(PyExc_ValueError, - "Package name too long"); - return NULL; } - strcpy(buf, pkgname_str); - } else { - /* __package__ not set, so figure it out and set it */ - modname = PyDict_GetItem(globals, namestr); - if (modname == NULL || !PyUnicode_Check(modname)) - return Py_None; - - modpath = PyDict_GetItem(globals, pathstr); - if (modpath != NULL) { - /* __path__ is set, so modname is already the package name */ - char *modname_str; - Py_ssize_t len; - int error; - - modname_str = _PyUnicode_AsStringAndSize(modname, &len); - if (len > MAXPATHLEN) { - PyErr_SetString(PyExc_ValueError, - "Module name too long"); - return NULL; - } - strcpy(buf, modname_str); - error = PyDict_SetItem(globals, pkgstr, modname); - if (error) { - PyErr_SetString(PyExc_ValueError, - "Could not set __package__"); - return NULL; + else { + package = _PyDict_GetItemId(globals, &PyId___name__); + if (package == NULL) { + PyErr_SetString(PyExc_KeyError, "'__name__' not in globals"); + goto error; } - } else { - /* Normal module, so work out the package name if any */ - char *start = _PyUnicode_AsString(modname); - char *lastdot = strrchr(start, '.'); - size_t len; - int error; - if (lastdot == NULL && level > 0) { - PyErr_SetString(PyExc_ValueError, - "Attempted relative import in non-package"); - return NULL; + else if (!PyUnicode_Check(package)) { + PyErr_SetString(PyExc_TypeError, "__name__ must be a string"); } - if (lastdot == NULL) { - error = PyDict_SetItem(globals, pkgstr, Py_None); - if (error) { - PyErr_SetString(PyExc_ValueError, - "Could not set __package__"); - return NULL; + 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; } - return Py_None; - } - len = lastdot - start; - if (len >= MAXPATHLEN) { - PyErr_SetString(PyExc_ValueError, - "Module name too long"); - return NULL; - } - strncpy(buf, start, len); - buf[len] = '\0'; - pkgname = PyUnicode_FromString(buf); - if (pkgname == NULL) { - return NULL; - } - error = PyDict_SetItem(globals, pkgstr, pkgname); - Py_DECREF(pkgname); - if (error) { - PyErr_SetString(PyExc_ValueError, - "Could not set __package__"); - return NULL; + 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; + } } - while (--level > 0) { - char *dot = strrchr(buf, '.'); - if (dot == NULL) { - PyErr_SetString(PyExc_ValueError, - "Attempted relative import beyond " - "toplevel package"); - return NULL; + else { /* level == 0 */ + if (PyUnicode_GET_LENGTH(name) == 0) { + PyErr_SetString(PyExc_ValueError, "Empty module name"); + goto error; } - *dot = '\0'; + package = Py_None; + Py_INCREF(package); } - *p_buflen = strlen(buf); - modules = PyImport_GetModuleDict(); - parent = PyDict_GetItemString(modules, buf); - if (parent == NULL) { - if (orig_level < 1) { - PyObject *err_msg = PyBytes_FromFormat( - "Parent module '%.200s' not found " - "while handling absolute import", buf); - if (err_msg == NULL) { - return NULL; + 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; } - if (!PyErr_WarnEx(PyExc_RuntimeWarning, - PyBytes_AsString(err_msg), 1)) { - *buf = '\0'; - *p_buflen = 0; - parent = Py_None; + else if (last_dot == -1) { + PyErr_SetString(PyExc_ValueError, + "attempted relative import beyond top-level " + "package"); + goto error; } - Py_DECREF(err_msg); - } else { - PyErr_Format(PyExc_SystemError, - "Parent module '%.200s' not loaded, " - "cannot perform relative import", buf); } - } - return parent; - /* We expect, but can't guarantee, if parent != None, that: - - parent.__name__ == buf - - parent.__dict__ is globals - If this is violated... Who cares? */ -} - -/* altmod is either None or same as mod */ -static PyObject * -load_next(PyObject *mod, PyObject *altmod, char **p_name, char *buf, - Py_ssize_t *p_buflen) -{ - char *name = *p_name; - char *dot = strchr(name, '.'); - size_t len; - char *p; - PyObject *result; - - if (strlen(name) == 0) { - /* completely empty module name should only happen in - 'from . import' (or '__import__("")')*/ - Py_INCREF(mod); - *p_name = NULL; - return mod; - } + 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; + } - if (dot == NULL) { - *p_name = NULL; - len = strlen(name); + abs_name = PyUnicode_Join(borrowed_dot, seq); + Py_DECREF(seq); + if (abs_name == NULL) { + goto error; + } + } + else { + abs_name = base; + } } else { - *p_name = dot+1; - len = dot-name; - } - if (len == 0) { - PyErr_SetString(PyExc_ValueError, - "Empty module name"); - return NULL; + abs_name = name; + Py_INCREF(abs_name); } - p = buf + *p_buflen; - if (p != buf) - *p++ = '.'; - if (p+len-buf >= MAXPATHLEN) { - PyErr_SetString(PyExc_ValueError, - "Module name too long"); - return NULL; - } - strncpy(p, name, len); - p[len] = '\0'; - *p_buflen = p+len-buf; - - result = import_submodule(mod, p, buf); - if (result == Py_None && altmod != mod) { - Py_DECREF(result); - /* Here, altmod must be None and mod must not be None */ - result = import_submodule(altmod, p, p); - if (result != NULL && result != Py_None) { - if (mark_miss(buf) != 0) { - Py_DECREF(result); - return NULL; - } - strncpy(buf, name, len); - buf[len] = '\0'; - *p_buflen = len; +#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"); } } - if (result == NULL) - return NULL; + Py_INCREF(builtins_import); - if (result == Py_None) { - Py_DECREF(result); - PyErr_Format(PyExc_ImportError, - "No module named %.200s", name); - return NULL; + 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; - return result; -} - -static int -mark_miss(char *name) -{ - PyObject *modules = PyImport_GetModuleDict(); - return PyDict_SetItemString(modules, name, Py_None); -} - -static int -ensure_fromlist(PyObject *mod, PyObject *fromlist, char *buf, Py_ssize_t buflen, - int recursive) -{ - int i; - - if (!PyObject_HasAttrString(mod, "__path__")) - return 1; - - for (i = 0; ; i++) { - PyObject *item = PySequence_GetItem(fromlist, i); - int hasit; - if (item == NULL) { - if (PyErr_ExceptionMatches(PyExc_IndexError)) { + 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(); - return 1; - } - return 0; } - if (!PyUnicode_Check(item)) { - PyErr_SetString(PyExc_TypeError, - "Item in ``from list'' not a string"); - Py_DECREF(item); - return 0; + 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); } - if (PyUnicode_AS_UNICODE(item)[0] == '*') { - PyObject *all; - Py_DECREF(item); - /* See if the package defines __all__ */ - if (recursive) - continue; /* Avoid endless recursion */ - all = PyObject_GetAttrString(mod, "__all__"); - if (all == NULL) - PyErr_Clear(); - else { - int ret = ensure_fromlist(mod, all, buf, buflen, 1); - Py_DECREF(all); - if (!ret) - return 0; + else { +#ifdef WITH_THREAD + if (_PyImport_ReleaseLock() < 0) { + PyErr_SetString(PyExc_RuntimeError, "not holding the import lock"); + goto error; } - continue; +#endif } - hasit = PyObject_HasAttr(mod, item); - if (!hasit) { - PyObject *item8; - char *subname; - PyObject *submod; - char *p; - item8 = PyUnicode_EncodeFSDefault(item); - if (!item8) { - PyErr_SetString(PyExc_ValueError, "Cannot encode path item"); - return 0; - } - subname = PyBytes_AS_STRING(item8); - if (buflen + strlen(subname) >= MAXPATHLEN) { - PyErr_SetString(PyExc_ValueError, - "Module name too long"); - Py_DECREF(item); - return 0; - } - p = buf + buflen; - *p++ = '.'; - strcpy(p, subname); - submod = import_submodule(mod, subname, buf); - Py_DECREF(item8); - Py_XDECREF(submod); - if (submod == NULL) { - Py_DECREF(item); - return 0; - } + } + 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; } - Py_DECREF(item); } + /* From now on we don't hold the import lock anymore. */ - /* NOTREACHED */ -} + 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); -static int -add_submodule(PyObject *mod, PyObject *submod, char *fullname, char *subname, - PyObject *modules) -{ - if (mod == Py_None) - return 1; - /* Irrespective of the success of this load, make a - reference to it in the parent package module. A copy gets - saved in the modules dictionary under the full name, so get a - reference from there, if need be. (The exception is when the - load failed with a SyntaxError -- then there's no trace in - sys.modules. In that case, of course, do nothing extra.) */ - if (submod == NULL) { - submod = PyDict_GetItemString(modules, fullname); - if (submod == NULL) - return 1; - } - if (PyModule_Check(mod)) { - /* We can't use setattr here since it can give a - * spurious warning if the submodule name shadows a - * builtin name */ - PyObject *dict = PyModule_GetDict(mod); - if (!dict) - return 0; - if (PyDict_SetItemString(dict, subname, submod) < 0) - return 0; - } - else { - if (PyObject_SetAttrString(mod, subname, submod) < 0) - return 0; - } - return 1; -} + if (borrowed_dot == NULL) { + goto error; + } -static PyObject * -import_submodule(PyObject *mod, char *subname, char *fullname) -{ - PyObject *modules = PyImport_GetModuleDict(); - PyObject *m = NULL; + partition = PyUnicode_Partition(name, borrowed_dot); + if (partition == NULL) { + goto error; + } - /* Require: - if mod == None: subname == fullname - else: mod.__name__ + "." + subname == fullname - */ + 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; + } - if ((m = PyDict_GetItemString(modules, fullname)) != NULL) { - Py_INCREF(m); - } - else { - PyObject *path, *loader = NULL; - char *buf; - struct filedescr *fdp; - FILE *fp = NULL; + front = PyTuple_GET_ITEM(partition, 0); + Py_INCREF(front); + Py_DECREF(partition); - if (mod == Py_None) - path = NULL; - else { - path = PyObject_GetAttrString(mod, "__path__"); - if (path == NULL) { - PyErr_Clear(); - Py_INCREF(Py_None); - return Py_None; + 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; + } - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - return PyErr_NoMemory(); - } - buf[0] = '\0'; - fdp = find_module(fullname, subname, path, buf, MAXPATHLEN+1, - &fp, &loader); - Py_XDECREF(path); - if (fdp == NULL) { - PyMem_FREE(buf); - if (!PyErr_ExceptionMatches(PyExc_ImportError)) - return NULL; - PyErr_Clear(); - Py_INCREF(Py_None); - return Py_None; + 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); + } } - m = load_module(fullname, fp, buf, fdp->type, loader); - Py_XDECREF(loader); - if (fp) - fclose(fp); - if (!add_submodule(mod, m, fullname, subname, modules)) { - Py_XDECREF(m); - m = NULL; + else { + final_mod = mod; + Py_INCREF(mod); } - PyMem_FREE(buf); } + else { + final_mod = _PyObject_CallMethodObjIdArgs(interp->importlib, + &PyId__handle_fromlist, mod, + fromlist, builtins_import, + NULL); + } + goto error; - return m; + 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; } @@ -2980,103 +1553,23 @@ import_submodule(PyObject *mod, char *subname, char *fullname) PyObject * PyImport_ReloadModule(PyObject *m) { - PyInterpreterState *interp = PyThreadState_Get()->interp; - PyObject *modules_reloading = interp->modules_reloading; + _Py_IDENTIFIER(reload); + PyObject *reloaded_module = NULL; PyObject *modules = PyImport_GetModuleDict(); - PyObject *path = NULL, *loader = NULL, *existing_m = NULL; - char *name, *subname; - char *buf; - struct filedescr *fdp; - FILE *fp = NULL; - PyObject *newm; - - if (modules_reloading == NULL) { - Py_FatalError("PyImport_ReloadModule: " - "no modules_reloading dictionary!"); - return NULL; - } - - if (m == NULL || !PyModule_Check(m)) { - PyErr_SetString(PyExc_TypeError, - "reload() argument must be module"); - return NULL; - } - name = (char*)PyModule_GetName(m); - if (name == NULL) - return NULL; - if (m != PyDict_GetItemString(modules, name)) { - PyErr_Format(PyExc_ImportError, - "reload(): module %.200s not in sys.modules", - name); - return NULL; - } - existing_m = PyDict_GetItemString(modules_reloading, name); - if (existing_m != NULL) { - /* Due to a recursive reload, this module is already - being reloaded. */ - Py_INCREF(existing_m); - return existing_m; - } - if (PyDict_SetItemString(modules_reloading, name, m) < 0) - return NULL; - - subname = strrchr(name, '.'); - if (subname == NULL) - subname = name; - else { - PyObject *parentname, *parent; - parentname = PyUnicode_FromStringAndSize(name, (subname-name)); - if (parentname == NULL) { - imp_modules_reloading_clear(); - return NULL; - } - parent = PyDict_GetItem(modules, parentname); - if (parent == NULL) { - PyErr_Format(PyExc_ImportError, - "reload(): parent %U not in sys.modules", - parentname); - Py_DECREF(parentname); - imp_modules_reloading_clear(); + PyObject *imp = PyDict_GetItemString(modules, "imp"); + if (imp == NULL) { + imp = PyImport_ImportModule("imp"); + if (imp == NULL) { return NULL; } - Py_DECREF(parentname); - subname++; - path = PyObject_GetAttrString(parent, "__path__"); - if (path == NULL) - PyErr_Clear(); - } - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - Py_XDECREF(path); - return PyErr_NoMemory(); } - buf[0] = '\0'; - fdp = find_module(name, subname, path, buf, MAXPATHLEN+1, &fp, &loader); - Py_XDECREF(path); - - if (fdp == NULL) { - Py_XDECREF(loader); - imp_modules_reloading_clear(); - PyMem_FREE(buf); - return NULL; + else { + Py_INCREF(imp); } - newm = load_module(name, fp, buf, fdp->type, loader); - Py_XDECREF(loader); - - if (fp) - fclose(fp); - if (newm == NULL) { - /* load_module probably removed name from modules because of - * the error. Put back the original module object. We're - * going to return NULL in this case regardless of whether - * replacing name succeeds, so the return value is ignored. - */ - PyDict_SetItemString(modules, name, m); - } - imp_modules_reloading_clear(); - PyMem_FREE(buf); - return newm; + reloaded_module = _PyObject_CallMethodId(imp, &PyId_reload, "O", m); + Py_DECREF(imp); + return reloaded_module; } @@ -3166,48 +1659,19 @@ PyImport_Import(PyObject *module_name) return r; } - -/* Module 'imp' provides Python access to the primitives used for - importing modules. -*/ - static PyObject * -imp_make_magic(long magic) -{ - char buf[4]; - - buf[0] = (char) ((magic >> 0) & 0xff); - buf[1] = (char) ((magic >> 8) & 0xff); - buf[2] = (char) ((magic >> 16) & 0xff); - buf[3] = (char) ((magic >> 24) & 0xff); - - return PyBytes_FromStringAndSize(buf, 4); -} - -static PyObject * -imp_get_magic(PyObject *self, PyObject *noargs) -{ - return imp_make_magic(pyc_magic); -} - -static PyObject * -imp_get_tag(PyObject *self, PyObject *noargs) -{ - return PyUnicode_FromString(pyc_tag); -} - -static PyObject * -imp_get_suffixes(PyObject *self, PyObject *noargs) +imp_extension_suffixes(PyObject *self, PyObject *noargs) { PyObject *list; - struct filedescr *fdp; + const char *suffix; + unsigned int index = 0; list = PyList_New(0); if (list == NULL) return NULL; - for (fdp = _PyImport_Filetab; fdp->suffix != NULL; fdp++) { - PyObject *item = Py_BuildValue("ssi", - fdp->suffix, fdp->mode, fdp->type); +#ifdef HAVE_DYNAMIC_LOADING + while ((suffix = _PyImport_DynLoadFiletab[index])) { + PyObject *item = PyUnicode_FromString(suffix); if (item == NULL) { Py_DECREF(list); return NULL; @@ -3218,102 +1682,19 @@ imp_get_suffixes(PyObject *self, PyObject *noargs) return NULL; } Py_DECREF(item); + index += 1; } +#endif return list; } static PyObject * -call_find_module(char *name, PyObject *path) -{ - extern int fclose(FILE *); - PyObject *fob, *ret; - PyObject *pathobj; - struct filedescr *fdp; - char *pathname; - FILE *fp = NULL; - int fd = -1; - char *found_encoding = NULL; - char *encoding = NULL; - - pathname = PyMem_MALLOC(MAXPATHLEN+1); - if (pathname == NULL) { - return PyErr_NoMemory(); - } - pathname[0] = '\0'; - if (path == Py_None) - path = NULL; - fdp = find_module(NULL, name, path, pathname, MAXPATHLEN+1, &fp, NULL); - if (fdp == NULL) - goto error_exit; - if (fp != NULL) { - fd = fileno(fp); - if (fd != -1) - fd = dup(fd); - fclose(fp); - fp = NULL; - if (fd == -1) { - PyErr_SetFromErrno(PyExc_OSError); - goto error_exit; - } - } - if (fd != -1) { - if (strchr(fdp->mode, 'b') == NULL) { - /* PyTokenizer_FindEncoding() returns PyMem_MALLOC'ed - memory. */ - found_encoding = PyTokenizer_FindEncoding(fd); - lseek(fd, 0, 0); /* Reset position */ - if (found_encoding == NULL && PyErr_Occurred()) { - close(fd); - goto error_exit; - } - encoding = (found_encoding != NULL) ? found_encoding : - (char*)PyUnicode_GetDefaultEncoding(); - } - fob = PyFile_FromFd(fd, pathname, fdp->mode, -1, - (char*)encoding, NULL, NULL, 1); - if (fob == NULL) { - close(fd); - PyMem_FREE(found_encoding); - goto error_exit; - } - } - else { - fob = Py_None; - Py_INCREF(fob); - } - pathobj = PyUnicode_DecodeFSDefault(pathname); - ret = Py_BuildValue("NN(ssi)", - fob, pathobj, fdp->suffix, fdp->mode, fdp->type); - PyMem_FREE(found_encoding); - PyMem_FREE(pathname); - return ret; - -error_exit: - PyMem_FREE(pathname); - return NULL; -} - -static PyObject * -imp_find_module(PyObject *self, PyObject *args) -{ - PyObject *name; - PyObject *ret, *path = NULL; - if (!PyArg_ParseTuple(args, "O&|O:find_module", - PyUnicode_FSConverter, &name, - &path)) - return NULL; - ret = call_find_module(PyBytes_AS_STRING(name), path); - Py_DECREF(name); - return ret; -} - -static PyObject * imp_init_builtin(PyObject *self, PyObject *args) { - char *name; + PyObject *name; int ret; PyObject *m; - if (!PyArg_ParseTuple(args, "s:init_builtin", &name)) + if (!PyArg_ParseTuple(args, "U:init_builtin", &name)) return NULL; ret = init_builtin(name); if (ret < 0) @@ -3322,7 +1703,7 @@ imp_init_builtin(PyObject *self, PyObject *args) Py_INCREF(Py_None); return Py_None; } - m = PyImport_AddModule(name); + m = PyImport_AddModuleObject(name); Py_XINCREF(m); return m; } @@ -3330,19 +1711,19 @@ imp_init_builtin(PyObject *self, PyObject *args) static PyObject * imp_init_frozen(PyObject *self, PyObject *args) { - char *name; + PyObject *name; int ret; PyObject *m; - if (!PyArg_ParseTuple(args, "s:init_frozen", &name)) + if (!PyArg_ParseTuple(args, "U:init_frozen", &name)) return NULL; - ret = PyImport_ImportFrozenModule(name); + ret = PyImport_ImportFrozenModuleObject(name); if (ret < 0) return NULL; if (ret == 0) { Py_INCREF(Py_None); return Py_None; } - m = PyImport_AddModule(name); + m = PyImport_AddModuleObject(name); Py_XINCREF(m); return m; } @@ -3350,9 +1731,9 @@ imp_init_frozen(PyObject *self, PyObject *args) static PyObject * imp_get_frozen_object(PyObject *self, PyObject *args) { - char *name; + PyObject *name; - if (!PyArg_ParseTuple(args, "s:get_frozen_object", &name)) + if (!PyArg_ParseTuple(args, "U:get_frozen_object", &name)) return NULL; return get_frozen_object(name); } @@ -3360,9 +1741,9 @@ imp_get_frozen_object(PyObject *self, PyObject *args) static PyObject * imp_is_frozen_package(PyObject *self, PyObject *args) { - char *name; + PyObject *name; - if (!PyArg_ParseTuple(args, "s:is_frozen_package", &name)) + if (!PyArg_ParseTuple(args, "U:is_frozen_package", &name)) return NULL; return is_frozen_package(name); } @@ -3370,8 +1751,8 @@ imp_is_frozen_package(PyObject *self, PyObject *args) static PyObject * imp_is_builtin(PyObject *self, PyObject *args) { - char *name; - if (!PyArg_ParseTuple(args, "s:is_builtin", &name)) + PyObject *name; + if (!PyArg_ParseTuple(args, "U:is_builtin", &name)) return NULL; return PyLong_FromLong(is_builtin(name)); } @@ -3379,333 +1760,54 @@ imp_is_builtin(PyObject *self, PyObject *args) static PyObject * imp_is_frozen(PyObject *self, PyObject *args) { - char *name; + PyObject *name; struct _frozen *p; - if (!PyArg_ParseTuple(args, "s:is_frozen", &name)) + if (!PyArg_ParseTuple(args, "U:is_frozen", &name)) return NULL; p = find_frozen(name); return PyBool_FromLong((long) (p == NULL ? 0 : p->size)); } -static FILE * -get_file(char *pathname, PyObject *fob, char *mode) -{ - FILE *fp; - if (mode[0] == 'U') - mode = "r" PY_STDIOTEXTMODE; - if (fob == NULL) { - fp = fopen(pathname, mode); - } - else { - int fd = PyObject_AsFileDescriptor(fob); - if (fd == -1) - return NULL; - if (!_PyVerify_fd(fd)) - goto error; - /* the FILE struct gets a new fd, so that it can be closed - * independently of the file descriptor given - */ - fd = dup(fd); - if (fd == -1) - goto error; - fp = fdopen(fd, mode); - } - if (fp) - return fp; -error: - PyErr_SetFromErrno(PyExc_IOError); - return NULL; -} - -static PyObject * -imp_load_compiled(PyObject *self, PyObject *args) -{ - char *name; - PyObject *pathname; - PyObject *fob = NULL; - PyObject *m; - FILE *fp; - if (!PyArg_ParseTuple(args, "sO&|O:load_compiled", - &name, - PyUnicode_FSConverter, &pathname, - &fob)) - return NULL; - fp = get_file(PyBytes_AS_STRING(pathname), fob, "rb"); - if (fp == NULL) { - Py_DECREF(pathname); - return NULL; - } - m = load_compiled_module(name, PyBytes_AS_STRING(pathname), fp); - fclose(fp); - Py_DECREF(pathname); - return m; -} - #ifdef HAVE_DYNAMIC_LOADING static PyObject * imp_load_dynamic(PyObject *self, PyObject *args) { - char *name; - PyObject *pathbytes; - char *pathname; - PyObject *fob = NULL; - PyObject *m; - FILE *fp = NULL; - if (!PyArg_ParseTuple(args, "sO&|O:load_dynamic", - &name, PyUnicode_FSConverter, &pathbytes, &fob)) - return NULL; - pathname = PyBytes_AS_STRING(pathbytes); - if (fob) { - fp = get_file(pathname, fob, "r"); - if (fp == NULL) { - Py_DECREF(pathbytes); - return NULL; - } - } - m = _PyImport_LoadDynamicModule(name, pathname, fp); - Py_DECREF(pathbytes); - if (fp) - fclose(fp); - return m; -} - -#endif /* HAVE_DYNAMIC_LOADING */ - -static PyObject * -imp_load_source(PyObject *self, PyObject *args) -{ - char *name; - PyObject *pathname; - PyObject *fob = NULL; - PyObject *m; + PyObject *name, *pathname, *fob = NULL, *mod; FILE *fp; - if (!PyArg_ParseTuple(args, "sO&|O:load_source", - &name, - PyUnicode_FSConverter, &pathname, - &fob)) - return NULL; - fp = get_file(PyBytes_AS_STRING(pathname), fob, "r"); - if (fp == NULL) { - Py_DECREF(pathname); - return NULL; - } - m = load_source_module(name, PyBytes_AS_STRING(pathname), fp); - Py_DECREF(pathname); - fclose(fp); - return m; -} -static PyObject * -imp_load_module(PyObject *self, PyObject *args) -{ - char *name; - PyObject *fob; - PyObject *pathname; - PyObject * ret; - char *suffix; /* Unused */ - char *mode; - int type; - FILE *fp; - - if (!PyArg_ParseTuple(args, "sOO&(ssi):load_module", - &name, &fob, - PyUnicode_FSConverter, &pathname, - &suffix, &mode, &type)) + if (!PyArg_ParseTuple(args, "UO&|O:load_dynamic", + &name, PyUnicode_FSDecoder, &pathname, &fob)) return NULL; - if (*mode) { - /* Mode must start with 'r' or 'U' and must not contain '+'. - Implicit in this test is the assumption that the mode - may contain other modifiers like 'b' or 't'. */ - - if (!(*mode == 'r' || *mode == 'U') || strchr(mode, '+')) { - PyErr_Format(PyExc_ValueError, - "invalid file open mode %.200s", mode); - Py_DECREF(pathname); - return NULL; - } - } - if (fob == Py_None) - fp = NULL; - else { - fp = get_file(NULL, fob, mode); + if (fob != NULL) { + fp = _Py_fopen(pathname, "r"); if (fp == NULL) { Py_DECREF(pathname); + if (!PyErr_Occurred()) + PyErr_SetFromErrno(PyExc_IOError); return NULL; } } - ret = load_module(name, fp, PyBytes_AS_STRING(pathname), type, NULL); + else + fp = NULL; + mod = _PyImport_LoadDynamicModule(name, pathname, fp); Py_DECREF(pathname); if (fp) fclose(fp); - return ret; -} - -static PyObject * -imp_load_package(PyObject *self, PyObject *args) -{ - char *name; - PyObject *pathname; - PyObject * ret; - if (!PyArg_ParseTuple(args, "sO&:load_package", - &name, PyUnicode_FSConverter, &pathname)) - return NULL; - ret = load_package(name, PyBytes_AS_STRING(pathname)); - Py_DECREF(pathname); - return ret; -} - -static PyObject * -imp_new_module(PyObject *self, PyObject *args) -{ - char *name; - if (!PyArg_ParseTuple(args, "s:new_module", &name)) - return NULL; - return PyModule_New(name); -} - -static PyObject * -imp_reload(PyObject *self, PyObject *v) -{ - return PyImport_ReloadModule(v); -} - -PyDoc_STRVAR(doc_reload, -"reload(module) -> module\n\ -\n\ -Reload the module. The module must have been successfully imported before."); - -static PyObject * -imp_cache_from_source(PyObject *self, PyObject *args, PyObject *kws) -{ - static char *kwlist[] = {"path", "debug_override", NULL}; - - char *buf; - PyObject *pathbytes; - char *cpathname; - PyObject *debug_override = NULL; - int debug = !Py_OptimizeFlag; - - if (!PyArg_ParseTupleAndKeywords( - args, kws, "O&|O", kwlist, - PyUnicode_FSConverter, &pathbytes, &debug_override)) - return NULL; - - if (debug_override != NULL && - (debug = PyObject_IsTrue(debug_override)) < 0) { - Py_DECREF(pathbytes); - return NULL; - } - - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - return PyErr_NoMemory(); - } - cpathname = make_compiled_pathname( - PyBytes_AS_STRING(pathbytes), - buf, MAXPATHLEN+1, debug); - Py_DECREF(pathbytes); - - if (cpathname == NULL) { - PyErr_Format(PyExc_SystemError, "path buffer too short"); - PyMem_FREE(buf); - return NULL; - } - { - PyObject *ret = PyUnicode_DecodeFSDefault(buf); - PyMem_FREE(buf); - return ret; - } + return mod; } -PyDoc_STRVAR(doc_cache_from_source, -"cache_from_source(path, [debug_override]) -> path\n\ -Given the path to a .py file, return the path to its .pyc/.pyo file.\n\ -\n\ -The .py file does not need to exist; this simply returns the path to the\n\ -.pyc/.pyo file calculated as if the .py file were imported. The extension\n\ -will be .pyc unless __debug__ is not defined, then it will be .pyo.\n\ -\n\ -If debug_override is not None, then it must be a boolean and is taken as\n\ -the value of __debug__ instead."); - -static PyObject * -imp_source_from_cache(PyObject *self, PyObject *args, PyObject *kws) -{ - static char *kwlist[] = {"path", NULL}; - - PyObject *pathname_obj; - char *pathname; - char *buf; - - if (!PyArg_ParseTupleAndKeywords( - args, kws, "O&", kwlist, - PyUnicode_FSConverter, &pathname_obj)) - return NULL; - - pathname = PyBytes_AS_STRING(pathname_obj); - buf = PyMem_MALLOC(MAXPATHLEN+1); - if (buf == NULL) { - return PyErr_NoMemory(); - } - if (make_source_pathname(pathname, buf) == NULL) { - PyErr_Format(PyExc_ValueError, "Not a PEP 3147 pyc path: %s", - pathname); - Py_DECREF(pathname_obj); - PyMem_FREE(buf); - return NULL; - } - Py_DECREF(pathname_obj); - { - PyObject *ret = PyUnicode_FromString(buf); - PyMem_FREE(buf); - return ret; - } -} +#endif /* HAVE_DYNAMIC_LOADING */ -PyDoc_STRVAR(doc_source_from_cache, -"source_from_cache(path) -> path\n\ -Given the path to a .pyc./.pyo file, return the path to its .py file.\n\ -\n\ -The .pyc/.pyo file does not need to exist; this simply returns the path to\n\ -the .py file calculated to correspond to the .pyc/.pyo file. If path\n\ -does not conform to PEP 3147 format, ValueError will be raised."); /* Doc strings */ PyDoc_STRVAR(doc_imp, -"This module provides the components needed to build your own\n\ -__import__ function. Undocumented functions are obsolete."); - -PyDoc_STRVAR(doc_find_module, -"find_module(name, [path]) -> (file, filename, (suffix, mode, type))\n\ -Search for a module. If path is omitted or None, search for a\n\ -built-in, frozen or special module and continue search in sys.path.\n\ -The module name cannot contain '.'; to search for a submodule of a\n\ -package, pass the submodule name and the package's __path__."); - -PyDoc_STRVAR(doc_load_module, -"load_module(name, file, filename, (suffix, mode, type)) -> module\n\ -Load a module, given information returned by find_module().\n\ -The module name must include the full package name, if any."); - -PyDoc_STRVAR(doc_get_magic, -"get_magic() -> string\n\ -Return the magic number for .pyc or .pyo files."); - -PyDoc_STRVAR(doc_get_tag, -"get_tag() -> string\n\ -Return the magic tag for .pyc or .pyo files."); - -PyDoc_STRVAR(doc_get_suffixes, -"get_suffixes() -> [(suffix, mode, type), ...]\n\ -Return a list of (suffix, mode, type) tuples describing the files\n\ -that find_module() looks for."); - -PyDoc_STRVAR(doc_new_module, -"new_module(name) -> module\n\ -Create a new module. Do not enter it in sys.modules.\n\ -The module name must include the full package name, if any."); +"(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\ @@ -3725,179 +1827,28 @@ Release the interpreter's import lock.\n\ On platforms without threads, this function does nothing."); static PyMethodDef imp_methods[] = { - {"find_module", imp_find_module, METH_VARARGS, doc_find_module}, - {"get_magic", imp_get_magic, METH_NOARGS, doc_get_magic}, - {"get_tag", imp_get_tag, METH_NOARGS, doc_get_tag}, - {"get_suffixes", imp_get_suffixes, METH_NOARGS, doc_get_suffixes}, - {"load_module", imp_load_module, METH_VARARGS, doc_load_module}, - {"new_module", imp_new_module, METH_VARARGS, doc_new_module}, + {"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}, - {"reload", imp_reload, METH_O, doc_reload}, - {"cache_from_source", (PyCFunction)imp_cache_from_source, - METH_VARARGS | METH_KEYWORDS, doc_cache_from_source}, - {"source_from_cache", (PyCFunction)imp_source_from_cache, - METH_VARARGS | METH_KEYWORDS, doc_source_from_cache}, - /* The rest are obsolete */ {"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}, - {"load_compiled", imp_load_compiled, METH_VARARGS}, #ifdef HAVE_DYNAMIC_LOADING {"load_dynamic", imp_load_dynamic, METH_VARARGS}, #endif - {"load_package", imp_load_package, METH_VARARGS}, - {"load_source", imp_load_source, METH_VARARGS}, + {"_fix_co_filename", imp_fix_co_filename, METH_VARARGS}, {NULL, NULL} /* sentinel */ }; -static int -setint(PyObject *d, char *name, int value) -{ - PyObject *v; - int err; - - v = PyLong_FromLong((long)value); - err = PyDict_SetItemString(d, name, v); - Py_XDECREF(v); - return err; -} - -typedef struct { - PyObject_HEAD -} NullImporter; - -static int -NullImporter_init(NullImporter *self, PyObject *args, PyObject *kwds) -{ -#ifndef MS_WINDOWS - PyObject *path; - struct stat statbuf; - int rv; - - if (!_PyArg_NoKeywords("NullImporter()", kwds)) - return -1; - - if (!PyArg_ParseTuple(args, "O&:NullImporter", - PyUnicode_FSConverter, &path)) - return -1; - - if (PyBytes_GET_SIZE(path) == 0) { - Py_DECREF(path); - PyErr_SetString(PyExc_ImportError, "empty pathname"); - return -1; - } - - rv = stat(PyBytes_AS_STRING(path), &statbuf); - Py_DECREF(path); - if (rv == 0) { - /* it exists */ - if (S_ISDIR(statbuf.st_mode)) { - /* it's a directory */ - PyErr_SetString(PyExc_ImportError, "existing directory"); - return -1; - } - } -#else /* MS_WINDOWS */ - PyObject *pathobj; - DWORD rv; - wchar_t *path; - - if (!_PyArg_NoKeywords("NullImporter()", kwds)) - return -1; - - if (!PyArg_ParseTuple(args, "U:NullImporter", - &pathobj)) - return -1; - - if (PyUnicode_GET_SIZE(pathobj) == 0) { - PyErr_SetString(PyExc_ImportError, "empty pathname"); - return -1; - } - - path = PyUnicode_AsWideCharString(pathobj, NULL); - if (path == NULL) - return -1; - /* see issue1293 and issue3677: - * stat() on Windows doesn't recognise paths like - * "e:\\shared\\" and "\\\\whiterab-c2znlh\\shared" as dirs. - */ - rv = GetFileAttributesW(path); - PyMem_Free(path); - if (rv != INVALID_FILE_ATTRIBUTES) { - /* it exists */ - if (rv & FILE_ATTRIBUTE_DIRECTORY) { - /* it's a directory */ - PyErr_SetString(PyExc_ImportError, "existing directory"); - return -1; - } - } -#endif - return 0; -} - -static PyObject * -NullImporter_find_module(NullImporter *self, PyObject *args) -{ - Py_RETURN_NONE; -} - -static PyMethodDef NullImporter_methods[] = { - {"find_module", (PyCFunction)NullImporter_find_module, METH_VARARGS, - "Always return None" - }, - {NULL} /* Sentinel */ -}; - - -PyTypeObject PyNullImporter_Type = { - PyVarObject_HEAD_INIT(NULL, 0) - "imp.NullImporter", /*tp_name*/ - sizeof(NullImporter), /*tp_basicsize*/ - 0, /*tp_itemsize*/ - 0, /*tp_dealloc*/ - 0, /*tp_print*/ - 0, /*tp_getattr*/ - 0, /*tp_setattr*/ - 0, /*tp_reserved*/ - 0, /*tp_repr*/ - 0, /*tp_as_number*/ - 0, /*tp_as_sequence*/ - 0, /*tp_as_mapping*/ - 0, /*tp_hash */ - 0, /*tp_call*/ - 0, /*tp_str*/ - 0, /*tp_getattro*/ - 0, /*tp_setattro*/ - 0, /*tp_as_buffer*/ - Py_TPFLAGS_DEFAULT, /*tp_flags*/ - "Null importer object", /* tp_doc */ - 0, /* tp_traverse */ - 0, /* tp_clear */ - 0, /* tp_richcompare */ - 0, /* tp_weaklistoffset */ - 0, /* tp_iter */ - 0, /* tp_iternext */ - NullImporter_methods, /* tp_methods */ - 0, /* tp_members */ - 0, /* tp_getset */ - 0, /* tp_base */ - 0, /* tp_dict */ - 0, /* tp_descr_get */ - 0, /* tp_descr_set */ - 0, /* tp_dictoffset */ - (initproc)NullImporter_init, /* tp_init */ - 0, /* tp_alloc */ - PyType_GenericNew /* tp_new */ -}; static struct PyModuleDef impmodule = { PyModuleDef_HEAD_INIT, - "imp", + "_imp", doc_imp, 0, imp_methods, @@ -3912,9 +1863,6 @@ PyInit_imp(void) { PyObject *m, *d; - if (PyType_Ready(&PyNullImporter_Type) < 0) - return NULL; - m = PyModule_Create(&impmodule); if (m == NULL) goto failure; @@ -3922,19 +1870,6 @@ PyInit_imp(void) if (d == NULL) goto failure; - if (setint(d, "SEARCH_ERROR", SEARCH_ERROR) < 0) goto failure; - if (setint(d, "PY_SOURCE", PY_SOURCE) < 0) goto failure; - if (setint(d, "PY_COMPILED", PY_COMPILED) < 0) goto failure; - if (setint(d, "C_EXTENSION", C_EXTENSION) < 0) goto failure; - if (setint(d, "PY_RESOURCE", PY_RESOURCE) < 0) goto failure; - if (setint(d, "PKG_DIRECTORY", PKG_DIRECTORY) < 0) goto failure; - if (setint(d, "C_BUILTIN", C_BUILTIN) < 0) goto failure; - if (setint(d, "PY_FROZEN", PY_FROZEN) < 0) goto failure; - if (setint(d, "PY_CODERESOURCE", PY_CODERESOURCE) < 0) goto failure; - if (setint(d, "IMP_HOOK", IMP_HOOK) < 0) goto failure; - - Py_INCREF(&PyNullImporter_Type); - PyModule_AddObject(m, "NullImporter", (PyObject *)&PyNullImporter_Type); return m; failure: Py_XDECREF(m); |