mirror of
https://github.com/python/cpython.git
synced 2024-11-24 02:15:30 +08:00
b2fc549278
This change is almost entirely moving code around and hiding import state behind internal API. We introduce no changes to behavior, nor to non-internal API. (Since there was already going to be a lot of churn, I took this as an opportunity to re-organize import.c into topically-grouped sections of code.) The motivation is to simplify a number of upcoming changes. Specific changes: * move existing import-related code to import.c, wherever possible * add internal API for interacting with import state (both global and per-interpreter) * use only API outside of import.c (to limit churn there when changing the location, etc.) * consolidate the import-related state of PyInterpreterState into a single struct field (this changes layout slightly) * add macros for import state in import.c (to simplify changing the location) * group code in import.c into sections *remove _PyState_AddModule() https://github.com/python/cpython/issues/101758
3418 lines
92 KiB
C
3418 lines
92 KiB
C
/* Module definition and import implementation */
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#include "Python.h"
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#include "pycore_import.h" // _PyImport_BootstrapImp()
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#include "pycore_initconfig.h" // _PyStatus_OK()
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#include "pycore_interp.h" // struct _import_runtime_state
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#include "pycore_namespace.h" // _PyNamespace_Type
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#include "pycore_pyerrors.h" // _PyErr_SetString()
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#include "pycore_pyhash.h" // _Py_KeyedHash()
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#include "pycore_pylifecycle.h"
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#include "pycore_pymem.h" // _PyMem_SetDefaultAllocator()
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#include "pycore_pystate.h" // _PyInterpreterState_GET()
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#include "pycore_sysmodule.h" // _PySys_Audit()
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#include "marshal.h" // PyMarshal_ReadObjectFromString()
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#include "importdl.h" // _PyImport_DynLoadFiletab
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#include "pydtrace.h" // PyDTrace_IMPORT_FIND_LOAD_START_ENABLED()
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#include <stdbool.h> // bool
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*[clinic input]
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module _imp
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=9c332475d8686284]*/
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#include "clinic/import.c.h"
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/*******************************/
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/* process-global import state */
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/*******************************/
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/* This table is defined in config.c: */
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extern struct _inittab _PyImport_Inittab[];
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// This is not used after Py_Initialize() is called.
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// (See _PyRuntimeState.imports.inittab.)
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struct _inittab *PyImport_Inittab = _PyImport_Inittab;
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// When we dynamically allocate a larger table for PyImport_ExtendInittab(),
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// we track the pointer here so we can deallocate it during finalization.
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static struct _inittab *inittab_copy = NULL;
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/*******************************/
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/* runtime-global import state */
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/*******************************/
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#define INITTAB _PyRuntime.imports.inittab
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#define LAST_MODULE_INDEX _PyRuntime.imports.last_module_index
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#define EXTENSIONS _PyRuntime.imports.extensions
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#define import_lock _PyRuntime.imports.lock.mutex
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#define import_lock_thread _PyRuntime.imports.lock.thread
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#define import_lock_level _PyRuntime.imports.lock.level
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#define FIND_AND_LOAD _PyRuntime.imports.find_and_load
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#define PKGCONTEXT (_PyRuntime.imports.pkgcontext)
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/*******************************/
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/* interpreter import state */
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/*******************************/
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#define MODULES(interp) \
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(interp)->imports.modules
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#define MODULES_BY_INDEX(interp) \
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(interp)->imports.modules_by_index
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#define IMPORTLIB(interp) \
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(interp)->imports.importlib
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#define OVERRIDE_FROZEN_MODULES(interp) \
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(interp)->imports.override_frozen_modules
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#ifdef HAVE_DLOPEN
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# define DLOPENFLAGS(interp) \
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(interp)->imports.dlopenflags
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#endif
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#define IMPORT_FUNC(interp) \
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(interp)->imports.import_func
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/*******************/
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/* the import lock */
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/*******************/
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/* Locking primitives to prevent parallel imports of the same module
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in different threads to return with a partially loaded module.
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These calls are serialized by the global interpreter lock. */
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void
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_PyImport_AcquireLock(void)
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{
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unsigned long me = PyThread_get_thread_ident();
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if (me == PYTHREAD_INVALID_THREAD_ID)
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return; /* Too bad */
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if (import_lock == NULL) {
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import_lock = PyThread_allocate_lock();
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if (import_lock == NULL)
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return; /* Nothing much we can do. */
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}
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if (import_lock_thread == me) {
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import_lock_level++;
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return;
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}
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if (import_lock_thread != PYTHREAD_INVALID_THREAD_ID ||
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!PyThread_acquire_lock(import_lock, 0))
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{
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PyThreadState *tstate = PyEval_SaveThread();
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PyThread_acquire_lock(import_lock, WAIT_LOCK);
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PyEval_RestoreThread(tstate);
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}
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assert(import_lock_level == 0);
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import_lock_thread = me;
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import_lock_level = 1;
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}
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int
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_PyImport_ReleaseLock(void)
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{
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unsigned long me = PyThread_get_thread_ident();
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if (me == PYTHREAD_INVALID_THREAD_ID || import_lock == NULL)
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return 0; /* Too bad */
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if (import_lock_thread != me)
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return -1;
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import_lock_level--;
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assert(import_lock_level >= 0);
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if (import_lock_level == 0) {
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import_lock_thread = PYTHREAD_INVALID_THREAD_ID;
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PyThread_release_lock(import_lock);
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}
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return 1;
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}
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#ifdef HAVE_FORK
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/* This function is called from PyOS_AfterFork_Child() to ensure that newly
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created child processes do not share locks with the parent.
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We now acquire the import lock around fork() calls but on some platforms
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(Solaris 9 and earlier? see isue7242) that still left us with problems. */
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PyStatus
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_PyImport_ReInitLock(void)
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{
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if (import_lock != NULL) {
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if (_PyThread_at_fork_reinit(&import_lock) < 0) {
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return _PyStatus_ERR("failed to create a new lock");
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}
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}
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if (import_lock_level > 1) {
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/* Forked as a side effect of import */
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unsigned long me = PyThread_get_thread_ident();
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PyThread_acquire_lock(import_lock, WAIT_LOCK);
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import_lock_thread = me;
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import_lock_level--;
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} else {
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import_lock_thread = PYTHREAD_INVALID_THREAD_ID;
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import_lock_level = 0;
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}
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return _PyStatus_OK();
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}
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#endif
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/***************/
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/* sys.modules */
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/***************/
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PyObject *
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_PyImport_InitModules(PyInterpreterState *interp)
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{
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assert(MODULES(interp) == NULL);
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MODULES(interp) = PyDict_New();
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if (MODULES(interp) == NULL) {
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return NULL;
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}
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return MODULES(interp);
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}
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PyObject *
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_PyImport_GetModules(PyInterpreterState *interp)
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{
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return MODULES(interp);
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}
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void
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_PyImport_ClearModules(PyInterpreterState *interp)
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{
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Py_SETREF(MODULES(interp), NULL);
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}
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PyObject *
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PyImport_GetModuleDict(void)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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if (MODULES(interp) == NULL) {
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Py_FatalError("interpreter has no modules dictionary");
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}
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return MODULES(interp);
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}
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// This is only kept around for extensions that use _Py_IDENTIFIER.
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PyObject *
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_PyImport_GetModuleId(_Py_Identifier *nameid)
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{
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PyObject *name = _PyUnicode_FromId(nameid); /* borrowed */
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if (name == NULL) {
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return NULL;
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}
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return PyImport_GetModule(name);
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}
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int
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_PyImport_SetModule(PyObject *name, PyObject *m)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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PyObject *modules = MODULES(interp);
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return PyObject_SetItem(modules, name, m);
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}
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int
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_PyImport_SetModuleString(const char *name, PyObject *m)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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PyObject *modules = MODULES(interp);
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return PyMapping_SetItemString(modules, name, m);
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}
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static PyObject *
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import_get_module(PyThreadState *tstate, PyObject *name)
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{
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PyObject *modules = MODULES(tstate->interp);
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if (modules == NULL) {
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_PyErr_SetString(tstate, PyExc_RuntimeError,
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"unable to get sys.modules");
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return NULL;
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}
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PyObject *m;
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Py_INCREF(modules);
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if (PyDict_CheckExact(modules)) {
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m = PyDict_GetItemWithError(modules, name); /* borrowed */
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Py_XINCREF(m);
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}
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else {
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m = PyObject_GetItem(modules, name);
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if (m == NULL && _PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
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_PyErr_Clear(tstate);
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}
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}
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Py_DECREF(modules);
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return m;
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}
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static int
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import_ensure_initialized(PyInterpreterState *interp, PyObject *mod, PyObject *name)
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{
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PyObject *spec;
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/* Optimization: only call _bootstrap._lock_unlock_module() if
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__spec__._initializing is true.
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NOTE: because of this, initializing must be set *before*
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stuffing the new module in sys.modules.
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*/
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spec = PyObject_GetAttr(mod, &_Py_ID(__spec__));
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int busy = _PyModuleSpec_IsInitializing(spec);
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Py_XDECREF(spec);
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if (busy) {
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/* Wait until module is done importing. */
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PyObject *value = _PyObject_CallMethodOneArg(
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IMPORTLIB(interp), &_Py_ID(_lock_unlock_module), name);
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if (value == NULL) {
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return -1;
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}
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Py_DECREF(value);
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}
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return 0;
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}
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static void remove_importlib_frames(PyThreadState *tstate);
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PyObject *
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PyImport_GetModule(PyObject *name)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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PyObject *mod;
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mod = import_get_module(tstate, name);
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if (mod != NULL && mod != Py_None) {
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if (import_ensure_initialized(tstate->interp, mod, name) < 0) {
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Py_DECREF(mod);
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remove_importlib_frames(tstate);
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return NULL;
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}
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}
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return mod;
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}
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/* Get the module object corresponding to a module name.
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First check the modules dictionary if there's one there,
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if not, create a new one and insert it in the modules dictionary. */
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static PyObject *
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import_add_module(PyThreadState *tstate, PyObject *name)
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{
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PyObject *modules = MODULES(tstate->interp);
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if (modules == NULL) {
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_PyErr_SetString(tstate, PyExc_RuntimeError,
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"no import module dictionary");
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return NULL;
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}
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PyObject *m;
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if (PyDict_CheckExact(modules)) {
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m = Py_XNewRef(PyDict_GetItemWithError(modules, name));
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}
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else {
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m = PyObject_GetItem(modules, name);
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// For backward-compatibility we copy the behavior
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// of PyDict_GetItemWithError().
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if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
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_PyErr_Clear(tstate);
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}
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}
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if (_PyErr_Occurred(tstate)) {
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return NULL;
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}
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if (m != NULL && PyModule_Check(m)) {
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return m;
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}
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Py_XDECREF(m);
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m = PyModule_NewObject(name);
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if (m == NULL)
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return NULL;
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if (PyObject_SetItem(modules, name, m) != 0) {
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Py_DECREF(m);
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return NULL;
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}
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return m;
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}
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PyObject *
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PyImport_AddModuleObject(PyObject *name)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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PyObject *mod = import_add_module(tstate, name);
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if (mod) {
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PyObject *ref = PyWeakref_NewRef(mod, NULL);
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Py_DECREF(mod);
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if (ref == NULL) {
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return NULL;
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}
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mod = PyWeakref_GetObject(ref);
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Py_DECREF(ref);
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}
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return mod; /* borrowed reference */
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}
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PyObject *
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PyImport_AddModule(const char *name)
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{
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PyObject *nameobj = PyUnicode_FromString(name);
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if (nameobj == NULL) {
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return NULL;
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}
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PyObject *module = PyImport_AddModuleObject(nameobj);
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Py_DECREF(nameobj);
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return module;
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}
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/* Remove name from sys.modules, if it's there.
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* Can be called with an exception raised.
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* If fail to remove name a new exception will be chained with the old
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* exception, otherwise the old exception is preserved.
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*/
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static void
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remove_module(PyThreadState *tstate, PyObject *name)
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{
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PyObject *type, *value, *traceback;
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_PyErr_Fetch(tstate, &type, &value, &traceback);
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PyObject *modules = MODULES(tstate->interp);
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if (PyDict_CheckExact(modules)) {
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PyObject *mod = _PyDict_Pop(modules, name, Py_None);
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Py_XDECREF(mod);
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}
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else if (PyMapping_DelItem(modules, name) < 0) {
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if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
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_PyErr_Clear(tstate);
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}
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}
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_PyErr_ChainExceptions(type, value, traceback);
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}
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/************************************/
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/* per-interpreter modules-by-index */
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/************************************/
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Py_ssize_t
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_PyImport_GetNextModuleIndex(void)
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{
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LAST_MODULE_INDEX++;
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return LAST_MODULE_INDEX;
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}
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static const char *
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_modules_by_index_check(PyInterpreterState *interp, Py_ssize_t index)
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{
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if (index == 0) {
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return "invalid module index";
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}
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if (MODULES_BY_INDEX(interp) == NULL) {
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return "Interpreters module-list not accessible.";
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}
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if (index > PyList_GET_SIZE(MODULES_BY_INDEX(interp))) {
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return "Module index out of bounds.";
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}
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return NULL;
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}
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static PyObject *
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_modules_by_index_get(PyInterpreterState *interp, PyModuleDef *def)
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{
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Py_ssize_t index = def->m_base.m_index;
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if (_modules_by_index_check(interp, index) != NULL) {
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return NULL;
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}
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PyObject *res = PyList_GET_ITEM(MODULES_BY_INDEX(interp), index);
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return res==Py_None ? NULL : res;
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}
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static int
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_modules_by_index_set(PyInterpreterState *interp,
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PyModuleDef *def, PyObject *module)
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{
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assert(def != NULL);
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assert(def->m_slots == NULL);
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assert(def->m_base.m_index > 0);
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if (MODULES_BY_INDEX(interp) == NULL) {
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MODULES_BY_INDEX(interp) = PyList_New(0);
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if (MODULES_BY_INDEX(interp) == NULL) {
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return -1;
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}
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}
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Py_ssize_t index = def->m_base.m_index;
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while (PyList_GET_SIZE(MODULES_BY_INDEX(interp)) <= index) {
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if (PyList_Append(MODULES_BY_INDEX(interp), Py_None) < 0) {
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return -1;
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}
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}
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return PyList_SetItem(MODULES_BY_INDEX(interp), index, Py_NewRef(module));
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}
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static int
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_modules_by_index_clear(PyInterpreterState *interp, PyModuleDef *def)
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{
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Py_ssize_t index = def->m_base.m_index;
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const char *err = _modules_by_index_check(interp, index);
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if (err != NULL) {
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Py_FatalError(err);
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return -1;
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}
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return PyList_SetItem(MODULES_BY_INDEX(interp), index, Py_NewRef(Py_None));
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}
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PyObject*
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PyState_FindModule(PyModuleDef* module)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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if (module->m_slots) {
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return NULL;
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}
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return _modules_by_index_get(interp, module);
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}
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int
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PyState_AddModule(PyObject* module, PyModuleDef* def)
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{
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if (!def) {
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Py_FatalError("module definition is NULL");
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return -1;
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}
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PyThreadState *tstate = _PyThreadState_GET();
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if (def->m_slots) {
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_PyErr_SetString(tstate,
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PyExc_SystemError,
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"PyState_AddModule called on module with slots");
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return -1;
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}
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PyInterpreterState *interp = tstate->interp;
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Py_ssize_t index = def->m_base.m_index;
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if (MODULES_BY_INDEX(interp) &&
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index < PyList_GET_SIZE(MODULES_BY_INDEX(interp)) &&
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module == PyList_GET_ITEM(MODULES_BY_INDEX(interp), index))
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{
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_Py_FatalErrorFormat(__func__, "module %p already added", module);
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return -1;
|
|
}
|
|
|
|
return _modules_by_index_set(interp, def, module);
|
|
}
|
|
|
|
int
|
|
PyState_RemoveModule(PyModuleDef* def)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
if (def->m_slots) {
|
|
_PyErr_SetString(tstate,
|
|
PyExc_SystemError,
|
|
"PyState_RemoveModule called on module with slots");
|
|
return -1;
|
|
}
|
|
return _modules_by_index_clear(tstate->interp, def);
|
|
}
|
|
|
|
|
|
// Used by finalize_modules()
|
|
void
|
|
_PyImport_ClearModulesByIndex(PyInterpreterState *interp)
|
|
{
|
|
if (!MODULES_BY_INDEX(interp)) {
|
|
return;
|
|
}
|
|
|
|
Py_ssize_t i;
|
|
for (i = 0; i < PyList_GET_SIZE(MODULES_BY_INDEX(interp)); i++) {
|
|
PyObject *m = PyList_GET_ITEM(MODULES_BY_INDEX(interp), i);
|
|
if (PyModule_Check(m)) {
|
|
/* cleanup the saved copy of module dicts */
|
|
PyModuleDef *md = PyModule_GetDef(m);
|
|
if (md) {
|
|
Py_CLEAR(md->m_base.m_copy);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Setting modules_by_index to NULL could be dangerous, so we
|
|
clear the list instead. */
|
|
if (PyList_SetSlice(MODULES_BY_INDEX(interp),
|
|
0, PyList_GET_SIZE(MODULES_BY_INDEX(interp)),
|
|
NULL)) {
|
|
PyErr_WriteUnraisable(MODULES_BY_INDEX(interp));
|
|
}
|
|
}
|
|
|
|
|
|
/*********************/
|
|
/* extension modules */
|
|
/*********************/
|
|
|
|
/* Make sure name is fully qualified.
|
|
|
|
This is a bit of a hack: when the shared library is loaded,
|
|
the module name is "package.module", but the module calls
|
|
PyModule_Create*() with just "module" for the name. The shared
|
|
library loader squirrels away the true name of the module in
|
|
_PyRuntime.imports.pkgcontext, and PyModule_Create*() will
|
|
substitute this (if the name actually matches).
|
|
*/
|
|
const char *
|
|
_PyImport_ResolveNameWithPackageContext(const char *name)
|
|
{
|
|
if (PKGCONTEXT != NULL) {
|
|
const char *p = strrchr(PKGCONTEXT, '.');
|
|
if (p != NULL && strcmp(name, p+1) == 0) {
|
|
name = PKGCONTEXT;
|
|
PKGCONTEXT = NULL;
|
|
}
|
|
}
|
|
return name;
|
|
}
|
|
|
|
const char *
|
|
_PyImport_SwapPackageContext(const char *newcontext)
|
|
{
|
|
const char *oldcontext = PKGCONTEXT;
|
|
PKGCONTEXT = newcontext;
|
|
return oldcontext;
|
|
}
|
|
|
|
#ifdef HAVE_DLOPEN
|
|
int
|
|
_PyImport_GetDLOpenFlags(PyInterpreterState *interp)
|
|
{
|
|
return DLOPENFLAGS(interp);
|
|
}
|
|
|
|
void
|
|
_PyImport_SetDLOpenFlags(PyInterpreterState *interp, int new_val)
|
|
{
|
|
DLOPENFLAGS(interp) = new_val;
|
|
}
|
|
#endif // HAVE_DLOPEN
|
|
|
|
|
|
/* Common implementation for _imp.exec_dynamic and _imp.exec_builtin */
|
|
static int
|
|
exec_builtin_or_dynamic(PyObject *mod) {
|
|
PyModuleDef *def;
|
|
void *state;
|
|
|
|
if (!PyModule_Check(mod)) {
|
|
return 0;
|
|
}
|
|
|
|
def = PyModule_GetDef(mod);
|
|
if (def == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
state = PyModule_GetState(mod);
|
|
if (state) {
|
|
/* Already initialized; skip reload */
|
|
return 0;
|
|
}
|
|
|
|
return PyModule_ExecDef(mod, def);
|
|
}
|
|
|
|
|
|
/*******************/
|
|
|
|
#if defined(__EMSCRIPTEN__) && defined(PY_CALL_TRAMPOLINE)
|
|
#include <emscripten.h>
|
|
EM_JS(PyObject*, _PyImport_InitFunc_TrampolineCall, (PyModInitFunction func), {
|
|
return wasmTable.get(func)();
|
|
});
|
|
#endif // __EMSCRIPTEN__ && PY_CALL_TRAMPOLINE
|
|
|
|
|
|
/*****************************/
|
|
/* single-phase init modules */
|
|
/*****************************/
|
|
|
|
/*
|
|
We support a number of kinds of single-phase init builtin/extension modules:
|
|
|
|
* "basic"
|
|
* no module state (PyModuleDef.m_size == -1)
|
|
* does not support repeated init (we use PyModuleDef.m_base.m_copy)
|
|
* may have process-global state
|
|
* the module's def is cached in _PyRuntime.imports.extensions,
|
|
by (name, filename)
|
|
* "reinit"
|
|
* no module state (PyModuleDef.m_size == 0)
|
|
* supports repeated init (m_copy is never used)
|
|
* should not have any process-global state
|
|
* its def is never cached in _PyRuntime.imports.extensions
|
|
(except, currently, under the main interpreter, for some reason)
|
|
* "with state" (almost the same as reinit)
|
|
* has module state (PyModuleDef.m_size > 0)
|
|
* supports repeated init (m_copy is never used)
|
|
* should not have any process-global state
|
|
* its def is never cached in _PyRuntime.imports.extensions
|
|
(except, currently, under the main interpreter, for some reason)
|
|
|
|
There are also variants within those classes:
|
|
|
|
* two or more modules share a PyModuleDef
|
|
* a module's init func uses another module's PyModuleDef
|
|
* a module's init func calls another's module's init func
|
|
* a module's init "func" is actually a variable statically initialized
|
|
to another module's init func
|
|
* two or modules share "methods"
|
|
* a module's init func copies another module's PyModuleDef
|
|
(with a different name)
|
|
* (basic-only) two or modules share process-global state
|
|
|
|
In the first case, where modules share a PyModuleDef, the following
|
|
notable weirdness happens:
|
|
|
|
* the module's __name__ matches the def, not the requested name
|
|
* the last module (with the same def) to be imported for the first time wins
|
|
* returned by PyState_Find_Module() (via interp->modules_by_index)
|
|
* (non-basic-only) its init func is used when re-loading any of them
|
|
(via the def's m_init)
|
|
* (basic-only) the copy of its __dict__ is used when re-loading any of them
|
|
(via the def's m_copy)
|
|
|
|
However, the following happens as expected:
|
|
|
|
* a new module object (with its own __dict__) is created for each request
|
|
* the module's __spec__ has the requested name
|
|
* the loaded module is cached in sys.modules under the requested name
|
|
* the m_index field of the shared def is not changed,
|
|
so at least PyState_FindModule() will always look in the same place
|
|
|
|
For "basic" modules there are other quirks:
|
|
|
|
* (whether sharing a def or not) when loaded the first time,
|
|
m_copy is set before _init_module_attrs() is called
|
|
in importlib._bootstrap.module_from_spec(),
|
|
so when the module is re-loaded, the previous value
|
|
for __wpec__ (and others) is reset, possibly unexpectedly.
|
|
|
|
Generally, when multiple interpreters are involved, some of the above
|
|
gets even messier.
|
|
*/
|
|
|
|
/* 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 the tuple
|
|
(module name, module name) (for built-in modules) or by
|
|
(filename, module name) (for dynamically loaded modules), containing these
|
|
modules. A copy of the module's dictionary is stored by calling
|
|
_PyImport_FixupExtensionObject() immediately after the module initialization
|
|
function succeeds. A copy can be retrieved from there by calling
|
|
import_find_extension().
|
|
|
|
Modules which do support multiple initialization set their m_size
|
|
field to a non-negative number (indicating the size of the
|
|
module-specific state). They are still recorded in the extensions
|
|
dictionary, to avoid loading shared libraries twice.
|
|
*/
|
|
|
|
static PyModuleDef *
|
|
_extensions_cache_get(PyObject *filename, PyObject *name)
|
|
{
|
|
PyObject *extensions = EXTENSIONS;
|
|
if (extensions == NULL) {
|
|
return NULL;
|
|
}
|
|
PyObject *key = PyTuple_Pack(2, filename, name);
|
|
if (key == NULL) {
|
|
return NULL;
|
|
}
|
|
PyModuleDef *def = (PyModuleDef *)PyDict_GetItemWithError(extensions, key);
|
|
Py_DECREF(key);
|
|
return def;
|
|
}
|
|
|
|
static int
|
|
_extensions_cache_set(PyObject *filename, PyObject *name, PyModuleDef *def)
|
|
{
|
|
PyObject *extensions = EXTENSIONS;
|
|
if (extensions == NULL) {
|
|
extensions = PyDict_New();
|
|
if (extensions == NULL) {
|
|
return -1;
|
|
}
|
|
EXTENSIONS = extensions;
|
|
}
|
|
PyObject *key = PyTuple_Pack(2, filename, name);
|
|
if (key == NULL) {
|
|
return -1;
|
|
}
|
|
int res = PyDict_SetItem(extensions, key, (PyObject *)def);
|
|
Py_DECREF(key);
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_extensions_cache_clear(void)
|
|
{
|
|
Py_CLEAR(EXTENSIONS);
|
|
}
|
|
|
|
static int
|
|
fix_up_extension(PyObject *mod, PyObject *name, PyObject *filename)
|
|
{
|
|
if (mod == NULL || !PyModule_Check(mod)) {
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
|
|
struct PyModuleDef *def = PyModule_GetDef(mod);
|
|
if (!def) {
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
if (_modules_by_index_set(tstate->interp, def, mod) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
// bpo-44050: Extensions and def->m_base.m_copy can be updated
|
|
// when the extension module doesn't support sub-interpreters.
|
|
// XXX Why special-case the main interpreter?
|
|
if (_Py_IsMainInterpreter(tstate->interp) || def->m_size == -1) {
|
|
if (def->m_size == -1) {
|
|
if (def->m_base.m_copy) {
|
|
/* Somebody already imported the module,
|
|
likely under a different name.
|
|
XXX this should really not happen. */
|
|
Py_CLEAR(def->m_base.m_copy);
|
|
}
|
|
PyObject *dict = PyModule_GetDict(mod);
|
|
if (dict == NULL) {
|
|
return -1;
|
|
}
|
|
def->m_base.m_copy = PyDict_Copy(dict);
|
|
if (def->m_base.m_copy == NULL) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (_extensions_cache_set(filename, name, def) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_PyImport_FixupExtensionObject(PyObject *mod, PyObject *name,
|
|
PyObject *filename, PyObject *modules)
|
|
{
|
|
if (PyObject_SetItem(modules, name, mod) < 0) {
|
|
return -1;
|
|
}
|
|
if (fix_up_extension(mod, name, filename) < 0) {
|
|
PyMapping_DelItem(modules, name);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
import_find_extension(PyThreadState *tstate, PyObject *name,
|
|
PyObject *filename)
|
|
{
|
|
/* Only single-phase init modules will be in the cache. */
|
|
PyModuleDef *def = _extensions_cache_get(filename, name);
|
|
if (def == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *mod, *mdict;
|
|
PyObject *modules = MODULES(tstate->interp);
|
|
|
|
if (def->m_size == -1) {
|
|
/* Module does not support repeated initialization */
|
|
if (def->m_base.m_copy == NULL)
|
|
return NULL;
|
|
mod = import_add_module(tstate, name);
|
|
if (mod == NULL)
|
|
return NULL;
|
|
mdict = PyModule_GetDict(mod);
|
|
if (mdict == NULL) {
|
|
Py_DECREF(mod);
|
|
return NULL;
|
|
}
|
|
if (PyDict_Update(mdict, def->m_base.m_copy)) {
|
|
Py_DECREF(mod);
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
if (def->m_base.m_init == NULL)
|
|
return NULL;
|
|
mod = _PyImport_InitFunc_TrampolineCall(def->m_base.m_init);
|
|
if (mod == NULL)
|
|
return NULL;
|
|
if (PyObject_SetItem(modules, name, mod) == -1) {
|
|
Py_DECREF(mod);
|
|
return NULL;
|
|
}
|
|
}
|
|
if (_modules_by_index_set(tstate->interp, def, mod) < 0) {
|
|
PyMapping_DelItem(modules, name);
|
|
Py_DECREF(mod);
|
|
return NULL;
|
|
}
|
|
|
|
int verbose = _PyInterpreterState_GetConfig(tstate->interp)->verbose;
|
|
if (verbose) {
|
|
PySys_FormatStderr("import %U # previously loaded (%R)\n",
|
|
name, filename);
|
|
}
|
|
return mod;
|
|
}
|
|
|
|
|
|
/*******************/
|
|
/* builtin modules */
|
|
/*******************/
|
|
|
|
int
|
|
_PyImport_FixupBuiltin(PyObject *mod, const char *name, PyObject *modules)
|
|
{
|
|
int res = -1;
|
|
PyObject *nameobj;
|
|
nameobj = PyUnicode_InternFromString(name);
|
|
if (nameobj == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyObject_SetItem(modules, nameobj, mod) < 0) {
|
|
goto finally;
|
|
}
|
|
if (fix_up_extension(mod, nameobj, nameobj) < 0) {
|
|
PyMapping_DelItem(modules, nameobj);
|
|
goto finally;
|
|
}
|
|
res = 0;
|
|
|
|
finally:
|
|
Py_DECREF(nameobj);
|
|
return res;
|
|
}
|
|
|
|
/* Helper to test for built-in module */
|
|
|
|
static int
|
|
is_builtin(PyObject *name)
|
|
{
|
|
int i;
|
|
struct _inittab *inittab = INITTAB;
|
|
for (i = 0; inittab[i].name != NULL; i++) {
|
|
if (_PyUnicode_EqualToASCIIString(name, inittab[i].name)) {
|
|
if (inittab[i].initfunc == NULL)
|
|
return -1;
|
|
else
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static PyObject*
|
|
create_builtin(PyThreadState *tstate, PyObject *name, PyObject *spec)
|
|
{
|
|
PyObject *mod = import_find_extension(tstate, name, name);
|
|
if (mod || _PyErr_Occurred(tstate)) {
|
|
return mod;
|
|
}
|
|
|
|
PyObject *modules = MODULES(tstate->interp);
|
|
for (struct _inittab *p = INITTAB; p->name != NULL; p++) {
|
|
if (_PyUnicode_EqualToASCIIString(name, p->name)) {
|
|
if (p->initfunc == NULL) {
|
|
/* Cannot re-init internal module ("sys" or "builtins") */
|
|
mod = PyImport_AddModuleObject(name);
|
|
return Py_XNewRef(mod);
|
|
}
|
|
mod = _PyImport_InitFunc_TrampolineCall(*p->initfunc);
|
|
if (mod == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (PyObject_TypeCheck(mod, &PyModuleDef_Type)) {
|
|
return PyModule_FromDefAndSpec((PyModuleDef*)mod, spec);
|
|
}
|
|
else {
|
|
/* Remember pointer to module init function. */
|
|
PyModuleDef *def = PyModule_GetDef(mod);
|
|
if (def == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
def->m_base.m_init = p->initfunc;
|
|
if (_PyImport_FixupExtensionObject(mod, name, name,
|
|
modules) < 0) {
|
|
return NULL;
|
|
}
|
|
return mod;
|
|
}
|
|
}
|
|
}
|
|
|
|
// not found
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*****************************/
|
|
/* the builtin modules table */
|
|
/*****************************/
|
|
|
|
/* API for embedding applications that want to add their own entries
|
|
to the table of built-in modules. This should normally be called
|
|
*before* Py_Initialize(). When the table resize fails, -1 is
|
|
returned and the existing table is unchanged.
|
|
|
|
After a similar function by Just van Rossum. */
|
|
|
|
int
|
|
PyImport_ExtendInittab(struct _inittab *newtab)
|
|
{
|
|
struct _inittab *p;
|
|
size_t i, n;
|
|
int res = 0;
|
|
|
|
if (INITTAB != NULL) {
|
|
Py_FatalError("PyImport_ExtendInittab() may not be called after Py_Initialize()");
|
|
}
|
|
|
|
/* Count the number of entries in both tables */
|
|
for (n = 0; newtab[n].name != NULL; n++)
|
|
;
|
|
if (n == 0)
|
|
return 0; /* Nothing to do */
|
|
for (i = 0; PyImport_Inittab[i].name != NULL; i++)
|
|
;
|
|
|
|
/* Force default raw memory allocator to get a known allocator to be able
|
|
to release the memory in _PyImport_Fini2() */
|
|
PyMemAllocatorEx old_alloc;
|
|
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
|
|
/* Allocate new memory for the combined table */
|
|
p = NULL;
|
|
if (i + n <= SIZE_MAX / sizeof(struct _inittab) - 1) {
|
|
size_t size = sizeof(struct _inittab) * (i + n + 1);
|
|
p = PyMem_RawRealloc(inittab_copy, size);
|
|
}
|
|
if (p == NULL) {
|
|
res = -1;
|
|
goto done;
|
|
}
|
|
|
|
/* Copy the tables into the new memory at the first call
|
|
to PyImport_ExtendInittab(). */
|
|
if (inittab_copy != PyImport_Inittab) {
|
|
memcpy(p, PyImport_Inittab, (i+1) * sizeof(struct _inittab));
|
|
}
|
|
memcpy(p + i, newtab, (n + 1) * sizeof(struct _inittab));
|
|
PyImport_Inittab = inittab_copy = p;
|
|
|
|
done:
|
|
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
return res;
|
|
}
|
|
|
|
/* Shorthand to add a single entry given a name and a function */
|
|
|
|
int
|
|
PyImport_AppendInittab(const char *name, PyObject* (*initfunc)(void))
|
|
{
|
|
struct _inittab newtab[2];
|
|
|
|
if (INITTAB != NULL) {
|
|
Py_FatalError("PyImport_AppendInittab() may not be called after Py_Initialize()");
|
|
}
|
|
|
|
memset(newtab, '\0', sizeof newtab);
|
|
|
|
newtab[0].name = name;
|
|
newtab[0].initfunc = initfunc;
|
|
|
|
return PyImport_ExtendInittab(newtab);
|
|
}
|
|
|
|
|
|
/* the internal table */
|
|
|
|
static int
|
|
init_builtin_modules_table(void)
|
|
{
|
|
size_t size;
|
|
for (size = 0; PyImport_Inittab[size].name != NULL; size++)
|
|
;
|
|
size++;
|
|
|
|
/* Make the copy. */
|
|
struct _inittab *copied = PyMem_RawMalloc(size * sizeof(struct _inittab));
|
|
if (copied == NULL) {
|
|
return -1;
|
|
}
|
|
memcpy(copied, PyImport_Inittab, size * sizeof(struct _inittab));
|
|
INITTAB = copied;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
fini_builtin_modules_table(void)
|
|
{
|
|
struct _inittab *inittab = INITTAB;
|
|
INITTAB = NULL;
|
|
PyMem_RawFree(inittab);
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_GetBuiltinModuleNames(void)
|
|
{
|
|
PyObject *list = PyList_New(0);
|
|
if (list == NULL) {
|
|
return NULL;
|
|
}
|
|
struct _inittab *inittab = INITTAB;
|
|
for (Py_ssize_t i = 0; inittab[i].name != NULL; i++) {
|
|
PyObject *name = PyUnicode_FromString(inittab[i].name);
|
|
if (name == NULL) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
}
|
|
if (PyList_Append(list, name) < 0) {
|
|
Py_DECREF(name);
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(name);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
|
|
/********************/
|
|
/* the magic number */
|
|
/********************/
|
|
|
|
/* Helper for pythonrun.c -- return magic number and tag. */
|
|
|
|
long
|
|
PyImport_GetMagicNumber(void)
|
|
{
|
|
long res;
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
PyObject *external, *pyc_magic;
|
|
|
|
external = PyObject_GetAttrString(IMPORTLIB(interp), "_bootstrap_external");
|
|
if (external == NULL)
|
|
return -1;
|
|
pyc_magic = PyObject_GetAttrString(external, "_RAW_MAGIC_NUMBER");
|
|
Py_DECREF(external);
|
|
if (pyc_magic == NULL)
|
|
return -1;
|
|
res = PyLong_AsLong(pyc_magic);
|
|
Py_DECREF(pyc_magic);
|
|
return res;
|
|
}
|
|
|
|
|
|
extern const char * _PySys_ImplCacheTag;
|
|
|
|
const char *
|
|
PyImport_GetMagicTag(void)
|
|
{
|
|
return _PySys_ImplCacheTag;
|
|
}
|
|
|
|
|
|
/*********************************/
|
|
/* a Python module's code object */
|
|
/*********************************/
|
|
|
|
/* Execute a code object in a module and return the module object
|
|
* WITH INCREMENTED REFERENCE COUNT. If an error occurs, name is
|
|
* removed from sys.modules, to avoid leaving damaged module objects
|
|
* in sys.modules. The caller may wish to restore the original
|
|
* module object (if any) in this case; PyImport_ReloadModule is an
|
|
* example.
|
|
*
|
|
* Note that PyImport_ExecCodeModuleWithPathnames() is the preferred, richer
|
|
* interface. The other two exist primarily for backward compatibility.
|
|
*/
|
|
PyObject *
|
|
PyImport_ExecCodeModule(const char *name, PyObject *co)
|
|
{
|
|
return PyImport_ExecCodeModuleWithPathnames(
|
|
name, co, (char *)NULL, (char *)NULL);
|
|
}
|
|
|
|
PyObject *
|
|
PyImport_ExecCodeModuleEx(const char *name, PyObject *co, const char *pathname)
|
|
{
|
|
return PyImport_ExecCodeModuleWithPathnames(
|
|
name, co, pathname, (char *)NULL);
|
|
}
|
|
|
|
PyObject *
|
|
PyImport_ExecCodeModuleWithPathnames(const char *name, PyObject *co,
|
|
const char *pathname,
|
|
const char *cpathname)
|
|
{
|
|
PyObject *m = NULL;
|
|
PyObject *nameobj, *pathobj = NULL, *cpathobj = NULL, *external= 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 = _PyInterpreterState_GET();
|
|
|
|
if (interp == NULL) {
|
|
Py_FatalError("no current interpreter");
|
|
}
|
|
|
|
external= PyObject_GetAttrString(IMPORTLIB(interp),
|
|
"_bootstrap_external");
|
|
if (external != NULL) {
|
|
pathobj = _PyObject_CallMethodOneArg(
|
|
external, &_Py_ID(_get_sourcefile), cpathobj);
|
|
Py_DECREF(external);
|
|
}
|
|
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;
|
|
}
|
|
|
|
static PyObject *
|
|
module_dict_for_exec(PyThreadState *tstate, PyObject *name)
|
|
{
|
|
PyObject *m, *d;
|
|
|
|
m = import_add_module(tstate, name);
|
|
if (m == NULL)
|
|
return NULL;
|
|
/* If the module is being reloaded, we get the old module back
|
|
and re-use its dict to exec the new code. */
|
|
d = PyModule_GetDict(m);
|
|
int r = PyDict_Contains(d, &_Py_ID(__builtins__));
|
|
if (r == 0) {
|
|
r = PyDict_SetItem(d, &_Py_ID(__builtins__), PyEval_GetBuiltins());
|
|
}
|
|
if (r < 0) {
|
|
remove_module(tstate, name);
|
|
Py_DECREF(m);
|
|
return NULL;
|
|
}
|
|
|
|
Py_INCREF(d);
|
|
Py_DECREF(m);
|
|
return d;
|
|
}
|
|
|
|
static PyObject *
|
|
exec_code_in_module(PyThreadState *tstate, PyObject *name,
|
|
PyObject *module_dict, PyObject *code_object)
|
|
{
|
|
PyObject *v, *m;
|
|
|
|
v = PyEval_EvalCode(code_object, module_dict, module_dict);
|
|
if (v == NULL) {
|
|
remove_module(tstate, name);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(v);
|
|
|
|
m = import_get_module(tstate, name);
|
|
if (m == NULL && !_PyErr_Occurred(tstate)) {
|
|
_PyErr_Format(tstate, PyExc_ImportError,
|
|
"Loaded module %R not found in sys.modules",
|
|
name);
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
PyObject*
|
|
PyImport_ExecCodeModuleObject(PyObject *name, PyObject *co, PyObject *pathname,
|
|
PyObject *cpathname)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyObject *d, *external, *res;
|
|
|
|
d = module_dict_for_exec(tstate, name);
|
|
if (d == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (pathname == NULL) {
|
|
pathname = ((PyCodeObject *)co)->co_filename;
|
|
}
|
|
external = PyObject_GetAttrString(IMPORTLIB(tstate->interp),
|
|
"_bootstrap_external");
|
|
if (external == NULL) {
|
|
Py_DECREF(d);
|
|
return NULL;
|
|
}
|
|
res = PyObject_CallMethodObjArgs(external, &_Py_ID(_fix_up_module),
|
|
d, name, pathname, cpathname, NULL);
|
|
Py_DECREF(external);
|
|
if (res != NULL) {
|
|
Py_DECREF(res);
|
|
res = exec_code_in_module(tstate, name, d, co);
|
|
}
|
|
Py_DECREF(d);
|
|
return res;
|
|
}
|
|
|
|
|
|
static void
|
|
update_code_filenames(PyCodeObject *co, PyObject *oldname, PyObject *newname)
|
|
{
|
|
PyObject *constants, *tmp;
|
|
Py_ssize_t i, n;
|
|
|
|
if (PyUnicode_Compare(co->co_filename, oldname))
|
|
return;
|
|
|
|
Py_XSETREF(co->co_filename, Py_NewRef(newname));
|
|
|
|
constants = co->co_consts;
|
|
n = PyTuple_GET_SIZE(constants);
|
|
for (i = 0; i < n; i++) {
|
|
tmp = PyTuple_GET_ITEM(constants, i);
|
|
if (PyCode_Check(tmp))
|
|
update_code_filenames((PyCodeObject *)tmp,
|
|
oldname, newname);
|
|
}
|
|
}
|
|
|
|
static void
|
|
update_compiled_module(PyCodeObject *co, PyObject *newname)
|
|
{
|
|
PyObject *oldname;
|
|
|
|
if (PyUnicode_Compare(co->co_filename, newname) == 0)
|
|
return;
|
|
|
|
oldname = co->co_filename;
|
|
Py_INCREF(oldname);
|
|
update_code_filenames(co, oldname, newname);
|
|
Py_DECREF(oldname);
|
|
}
|
|
|
|
|
|
/******************/
|
|
/* frozen modules */
|
|
/******************/
|
|
|
|
/* Return true if the name is an alias. In that case, "alias" is set
|
|
to the original module name. If it is an alias but the original
|
|
module isn't known then "alias" is set to NULL while true is returned. */
|
|
static bool
|
|
resolve_module_alias(const char *name, const struct _module_alias *aliases,
|
|
const char **alias)
|
|
{
|
|
const struct _module_alias *entry;
|
|
for (entry = aliases; ; entry++) {
|
|
if (entry->name == NULL) {
|
|
/* It isn't an alias. */
|
|
return false;
|
|
}
|
|
if (strcmp(name, entry->name) == 0) {
|
|
if (alias != NULL) {
|
|
*alias = entry->orig;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool
|
|
use_frozen(void)
|
|
{
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
int override = OVERRIDE_FROZEN_MODULES(interp);
|
|
if (override > 0) {
|
|
return true;
|
|
}
|
|
else if (override < 0) {
|
|
return false;
|
|
}
|
|
else {
|
|
return interp->config.use_frozen_modules;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
list_frozen_module_names(void)
|
|
{
|
|
PyObject *names = PyList_New(0);
|
|
if (names == NULL) {
|
|
return NULL;
|
|
}
|
|
bool enabled = use_frozen();
|
|
const struct _frozen *p;
|
|
#define ADD_MODULE(name) \
|
|
do { \
|
|
PyObject *nameobj = PyUnicode_FromString(name); \
|
|
if (nameobj == NULL) { \
|
|
goto error; \
|
|
} \
|
|
int res = PyList_Append(names, nameobj); \
|
|
Py_DECREF(nameobj); \
|
|
if (res != 0) { \
|
|
goto error; \
|
|
} \
|
|
} while(0)
|
|
// We always use the bootstrap modules.
|
|
for (p = _PyImport_FrozenBootstrap; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
ADD_MODULE(p->name);
|
|
}
|
|
// Frozen stdlib modules may be disabled.
|
|
for (p = _PyImport_FrozenStdlib; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
if (enabled) {
|
|
ADD_MODULE(p->name);
|
|
}
|
|
}
|
|
for (p = _PyImport_FrozenTest; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
if (enabled) {
|
|
ADD_MODULE(p->name);
|
|
}
|
|
}
|
|
#undef ADD_MODULE
|
|
// Add any custom modules.
|
|
if (PyImport_FrozenModules != NULL) {
|
|
for (p = PyImport_FrozenModules; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
PyObject *nameobj = PyUnicode_FromString(p->name);
|
|
if (nameobj == NULL) {
|
|
goto error;
|
|
}
|
|
int found = PySequence_Contains(names, nameobj);
|
|
if (found < 0) {
|
|
Py_DECREF(nameobj);
|
|
goto error;
|
|
}
|
|
else if (found) {
|
|
Py_DECREF(nameobj);
|
|
}
|
|
else {
|
|
int res = PyList_Append(names, nameobj);
|
|
Py_DECREF(nameobj);
|
|
if (res != 0) {
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return names;
|
|
|
|
error:
|
|
Py_DECREF(names);
|
|
return NULL;
|
|
}
|
|
|
|
typedef enum {
|
|
FROZEN_OKAY,
|
|
FROZEN_BAD_NAME, // The given module name wasn't valid.
|
|
FROZEN_NOT_FOUND, // It wasn't in PyImport_FrozenModules.
|
|
FROZEN_DISABLED, // -X frozen_modules=off (and not essential)
|
|
FROZEN_EXCLUDED, /* The PyImport_FrozenModules entry has NULL "code"
|
|
(module is present but marked as unimportable, stops search). */
|
|
FROZEN_INVALID, /* The PyImport_FrozenModules entry is bogus
|
|
(eg. does not contain executable code). */
|
|
} frozen_status;
|
|
|
|
static inline void
|
|
set_frozen_error(frozen_status status, PyObject *modname)
|
|
{
|
|
const char *err = NULL;
|
|
switch (status) {
|
|
case FROZEN_BAD_NAME:
|
|
case FROZEN_NOT_FOUND:
|
|
err = "No such frozen object named %R";
|
|
break;
|
|
case FROZEN_DISABLED:
|
|
err = "Frozen modules are disabled and the frozen object named %R is not essential";
|
|
break;
|
|
case FROZEN_EXCLUDED:
|
|
err = "Excluded frozen object named %R";
|
|
break;
|
|
case FROZEN_INVALID:
|
|
err = "Frozen object named %R is invalid";
|
|
break;
|
|
case FROZEN_OKAY:
|
|
// There was no error.
|
|
break;
|
|
default:
|
|
Py_UNREACHABLE();
|
|
}
|
|
if (err != NULL) {
|
|
PyObject *msg = PyUnicode_FromFormat(err, modname);
|
|
if (msg == NULL) {
|
|
PyErr_Clear();
|
|
}
|
|
PyErr_SetImportError(msg, modname, NULL);
|
|
Py_XDECREF(msg);
|
|
}
|
|
}
|
|
|
|
static const struct _frozen *
|
|
look_up_frozen(const char *name)
|
|
{
|
|
const struct _frozen *p;
|
|
// We always use the bootstrap modules.
|
|
for (p = _PyImport_FrozenBootstrap; ; p++) {
|
|
if (p->name == NULL) {
|
|
// We hit the end-of-list sentinel value.
|
|
break;
|
|
}
|
|
if (strcmp(name, p->name) == 0) {
|
|
return p;
|
|
}
|
|
}
|
|
// Prefer custom modules, if any. Frozen stdlib modules can be
|
|
// disabled here by setting "code" to NULL in the array entry.
|
|
if (PyImport_FrozenModules != NULL) {
|
|
for (p = PyImport_FrozenModules; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
if (strcmp(name, p->name) == 0) {
|
|
return p;
|
|
}
|
|
}
|
|
}
|
|
// Frozen stdlib modules may be disabled.
|
|
if (use_frozen()) {
|
|
for (p = _PyImport_FrozenStdlib; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
if (strcmp(name, p->name) == 0) {
|
|
return p;
|
|
}
|
|
}
|
|
for (p = _PyImport_FrozenTest; ; p++) {
|
|
if (p->name == NULL) {
|
|
break;
|
|
}
|
|
if (strcmp(name, p->name) == 0) {
|
|
return p;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct frozen_info {
|
|
PyObject *nameobj;
|
|
const char *data;
|
|
PyObject *(*get_code)(void);
|
|
Py_ssize_t size;
|
|
bool is_package;
|
|
bool is_alias;
|
|
const char *origname;
|
|
};
|
|
|
|
static frozen_status
|
|
find_frozen(PyObject *nameobj, struct frozen_info *info)
|
|
{
|
|
if (info != NULL) {
|
|
memset(info, 0, sizeof(*info));
|
|
}
|
|
|
|
if (nameobj == NULL || nameobj == Py_None) {
|
|
return FROZEN_BAD_NAME;
|
|
}
|
|
const char *name = PyUnicode_AsUTF8(nameobj);
|
|
if (name == NULL) {
|
|
// Note that this function previously used
|
|
// _PyUnicode_EqualToASCIIString(). We clear the error here
|
|
// (instead of propagating it) to match the earlier behavior
|
|
// more closely.
|
|
PyErr_Clear();
|
|
return FROZEN_BAD_NAME;
|
|
}
|
|
|
|
const struct _frozen *p = look_up_frozen(name);
|
|
if (p == NULL) {
|
|
return FROZEN_NOT_FOUND;
|
|
}
|
|
if (info != NULL) {
|
|
info->nameobj = nameobj; // borrowed
|
|
info->data = (const char *)p->code;
|
|
info->get_code = p->get_code;
|
|
info->size = p->size;
|
|
info->is_package = p->is_package;
|
|
if (p->size < 0) {
|
|
// backward compatibility with negative size values
|
|
info->size = -(p->size);
|
|
info->is_package = true;
|
|
}
|
|
info->origname = name;
|
|
info->is_alias = resolve_module_alias(name, _PyImport_FrozenAliases,
|
|
&info->origname);
|
|
}
|
|
if (p->code == NULL && p->size == 0 && p->get_code != NULL) {
|
|
/* It is only deepfrozen. */
|
|
return FROZEN_OKAY;
|
|
}
|
|
if (p->code == NULL) {
|
|
/* It is frozen but marked as un-importable. */
|
|
return FROZEN_EXCLUDED;
|
|
}
|
|
if (p->code[0] == '\0' || p->size == 0) {
|
|
/* Does not contain executable code. */
|
|
return FROZEN_INVALID;
|
|
}
|
|
return FROZEN_OKAY;
|
|
}
|
|
|
|
static PyObject *
|
|
unmarshal_frozen_code(struct frozen_info *info)
|
|
{
|
|
if (info->get_code) {
|
|
PyObject *code = info->get_code();
|
|
assert(code != NULL);
|
|
return code;
|
|
}
|
|
PyObject *co = PyMarshal_ReadObjectFromString(info->data, info->size);
|
|
if (co == NULL) {
|
|
/* Does not contain executable code. */
|
|
set_frozen_error(FROZEN_INVALID, info->nameobj);
|
|
return NULL;
|
|
}
|
|
if (!PyCode_Check(co)) {
|
|
// We stick with TypeError for backward compatibility.
|
|
PyErr_Format(PyExc_TypeError,
|
|
"frozen object %R is not a code object",
|
|
info->nameobj);
|
|
Py_DECREF(co);
|
|
return NULL;
|
|
}
|
|
return co;
|
|
}
|
|
|
|
|
|
/* Initialize a frozen module.
|
|
Return 1 for success, 0 if the module is not found, and -1 with
|
|
an exception set if the initialization failed.
|
|
This function is also used from frozenmain.c */
|
|
|
|
int
|
|
PyImport_ImportFrozenModuleObject(PyObject *name)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyObject *co, *m, *d = NULL;
|
|
int err;
|
|
|
|
struct frozen_info info;
|
|
frozen_status status = find_frozen(name, &info);
|
|
if (status == FROZEN_NOT_FOUND || status == FROZEN_DISABLED) {
|
|
return 0;
|
|
}
|
|
else if (status == FROZEN_BAD_NAME) {
|
|
return 0;
|
|
}
|
|
else if (status != FROZEN_OKAY) {
|
|
set_frozen_error(status, name);
|
|
return -1;
|
|
}
|
|
co = unmarshal_frozen_code(&info);
|
|
if (co == NULL) {
|
|
return -1;
|
|
}
|
|
if (info.is_package) {
|
|
/* Set __path__ to the empty list */
|
|
PyObject *l;
|
|
m = import_add_module(tstate, name);
|
|
if (m == NULL)
|
|
goto err_return;
|
|
d = PyModule_GetDict(m);
|
|
l = PyList_New(0);
|
|
if (l == NULL) {
|
|
Py_DECREF(m);
|
|
goto err_return;
|
|
}
|
|
err = PyDict_SetItemString(d, "__path__", l);
|
|
Py_DECREF(l);
|
|
Py_DECREF(m);
|
|
if (err != 0)
|
|
goto err_return;
|
|
}
|
|
d = module_dict_for_exec(tstate, name);
|
|
if (d == NULL) {
|
|
goto err_return;
|
|
}
|
|
m = exec_code_in_module(tstate, name, d, co);
|
|
if (m == NULL) {
|
|
goto err_return;
|
|
}
|
|
Py_DECREF(m);
|
|
/* Set __origname__ (consumed in FrozenImporter._setup_module()). */
|
|
PyObject *origname;
|
|
if (info.origname) {
|
|
origname = PyUnicode_FromString(info.origname);
|
|
if (origname == NULL) {
|
|
goto err_return;
|
|
}
|
|
}
|
|
else {
|
|
origname = Py_NewRef(Py_None);
|
|
}
|
|
err = PyDict_SetItemString(d, "__origname__", origname);
|
|
Py_DECREF(origname);
|
|
if (err != 0) {
|
|
goto err_return;
|
|
}
|
|
Py_DECREF(d);
|
|
Py_DECREF(co);
|
|
return 1;
|
|
|
|
err_return:
|
|
Py_XDECREF(d);
|
|
Py_DECREF(co);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
PyImport_ImportFrozenModule(const char *name)
|
|
{
|
|
PyObject *nameobj;
|
|
int ret;
|
|
nameobj = PyUnicode_InternFromString(name);
|
|
if (nameobj == NULL)
|
|
return -1;
|
|
ret = PyImport_ImportFrozenModuleObject(nameobj);
|
|
Py_DECREF(nameobj);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*************/
|
|
/* importlib */
|
|
/*************/
|
|
|
|
/* Import the _imp extension by calling manually _imp.create_builtin() and
|
|
_imp.exec_builtin() since importlib is not initialized yet. Initializing
|
|
importlib requires the _imp module: this function fix the bootstrap issue.
|
|
*/
|
|
static PyObject*
|
|
bootstrap_imp(PyThreadState *tstate)
|
|
{
|
|
PyObject *name = PyUnicode_FromString("_imp");
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Mock a ModuleSpec object just good enough for PyModule_FromDefAndSpec():
|
|
// an object with just a name attribute.
|
|
//
|
|
// _imp.__spec__ is overridden by importlib._bootstrap._instal() anyway.
|
|
PyObject *attrs = Py_BuildValue("{sO}", "name", name);
|
|
if (attrs == NULL) {
|
|
goto error;
|
|
}
|
|
PyObject *spec = _PyNamespace_New(attrs);
|
|
Py_DECREF(attrs);
|
|
if (spec == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
// Create the _imp module from its definition.
|
|
PyObject *mod = create_builtin(tstate, name, spec);
|
|
Py_CLEAR(name);
|
|
Py_DECREF(spec);
|
|
if (mod == NULL) {
|
|
goto error;
|
|
}
|
|
assert(mod != Py_None); // not found
|
|
|
|
// Execute the _imp module: call imp_module_exec().
|
|
if (exec_builtin_or_dynamic(mod) < 0) {
|
|
Py_DECREF(mod);
|
|
goto error;
|
|
}
|
|
return mod;
|
|
|
|
error:
|
|
Py_XDECREF(name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Global initializations. Can be undone by Py_FinalizeEx(). Don't
|
|
call this twice without an intervening Py_FinalizeEx() call. When
|
|
initializations fail, a fatal error is issued and the function does
|
|
not return. On return, the first thread and interpreter state have
|
|
been created.
|
|
|
|
Locking: you must hold the interpreter lock while calling this.
|
|
(If the lock has not yet been initialized, that's equivalent to
|
|
having the lock, but you cannot use multiple threads.)
|
|
|
|
*/
|
|
static int
|
|
init_importlib(PyThreadState *tstate, PyObject *sysmod)
|
|
{
|
|
assert(!_PyErr_Occurred(tstate));
|
|
|
|
PyInterpreterState *interp = tstate->interp;
|
|
int verbose = _PyInterpreterState_GetConfig(interp)->verbose;
|
|
|
|
// Import _importlib through its frozen version, _frozen_importlib.
|
|
if (verbose) {
|
|
PySys_FormatStderr("import _frozen_importlib # frozen\n");
|
|
}
|
|
if (PyImport_ImportFrozenModule("_frozen_importlib") <= 0) {
|
|
return -1;
|
|
}
|
|
PyObject *importlib = PyImport_AddModule("_frozen_importlib"); // borrowed
|
|
if (importlib == NULL) {
|
|
return -1;
|
|
}
|
|
IMPORTLIB(interp) = Py_NewRef(importlib);
|
|
|
|
// Import the _imp module
|
|
if (verbose) {
|
|
PySys_FormatStderr("import _imp # builtin\n");
|
|
}
|
|
PyObject *imp_mod = bootstrap_imp(tstate);
|
|
if (imp_mod == NULL) {
|
|
return -1;
|
|
}
|
|
if (_PyImport_SetModuleString("_imp", imp_mod) < 0) {
|
|
Py_DECREF(imp_mod);
|
|
return -1;
|
|
}
|
|
|
|
// Install importlib as the implementation of import
|
|
PyObject *value = PyObject_CallMethod(importlib, "_install",
|
|
"OO", sysmod, imp_mod);
|
|
Py_DECREF(imp_mod);
|
|
if (value == NULL) {
|
|
return -1;
|
|
}
|
|
Py_DECREF(value);
|
|
|
|
assert(!_PyErr_Occurred(tstate));
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
init_importlib_external(PyInterpreterState *interp)
|
|
{
|
|
PyObject *value;
|
|
value = PyObject_CallMethod(IMPORTLIB(interp),
|
|
"_install_external_importers", "");
|
|
if (value == NULL) {
|
|
return -1;
|
|
}
|
|
Py_DECREF(value);
|
|
return 0;
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_GetImportlibLoader(PyInterpreterState *interp,
|
|
const char *loader_name)
|
|
{
|
|
return PyObject_GetAttrString(IMPORTLIB(interp), loader_name);
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_GetImportlibExternalLoader(PyInterpreterState *interp,
|
|
const char *loader_name)
|
|
{
|
|
PyObject *bootstrap = PyObject_GetAttrString(IMPORTLIB(interp),
|
|
"_bootstrap_external");
|
|
if (bootstrap == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *loader_type = PyObject_GetAttrString(bootstrap, loader_name);
|
|
Py_DECREF(bootstrap);
|
|
return loader_type;
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_BlessMyLoader(PyInterpreterState *interp, PyObject *module_globals)
|
|
{
|
|
PyObject *external = PyObject_GetAttrString(IMPORTLIB(interp),
|
|
"_bootstrap_external");
|
|
if (external == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *loader = PyObject_CallMethod(external, "_bless_my_loader",
|
|
"O", module_globals, NULL);
|
|
Py_DECREF(external);
|
|
return loader;
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_ImportlibModuleRepr(PyInterpreterState *interp, PyObject *m)
|
|
{
|
|
return PyObject_CallMethod(IMPORTLIB(interp), "_module_repr", "O", m);
|
|
}
|
|
|
|
|
|
/*******************/
|
|
|
|
/* Return a finder object for a sys.path/pkg.__path__ item 'p',
|
|
possibly by fetching it from the path_importer_cache dict. If it
|
|
wasn't yet cached, traverse path_hooks until a hook is found
|
|
that can handle the path item. Return None if no hook could;
|
|
this tells our caller that the path based finder could not find
|
|
a finder for this path item. Cache the result in
|
|
path_importer_cache. */
|
|
|
|
static PyObject *
|
|
get_path_importer(PyThreadState *tstate, PyObject *path_importer_cache,
|
|
PyObject *path_hooks, PyObject *p)
|
|
{
|
|
PyObject *importer;
|
|
Py_ssize_t j, nhooks;
|
|
|
|
/* These conditions are the caller's responsibility: */
|
|
assert(PyList_Check(path_hooks));
|
|
assert(PyDict_Check(path_importer_cache));
|
|
|
|
nhooks = PyList_Size(path_hooks);
|
|
if (nhooks < 0)
|
|
return NULL; /* Shouldn't happen */
|
|
|
|
importer = PyDict_GetItemWithError(path_importer_cache, p);
|
|
if (importer != NULL || _PyErr_Occurred(tstate)) {
|
|
return Py_XNewRef(importer);
|
|
}
|
|
|
|
/* set path_importer_cache[p] to None to avoid recursion */
|
|
if (PyDict_SetItem(path_importer_cache, p, Py_None) != 0)
|
|
return NULL;
|
|
|
|
for (j = 0; j < nhooks; j++) {
|
|
PyObject *hook = PyList_GetItem(path_hooks, j);
|
|
if (hook == NULL)
|
|
return NULL;
|
|
importer = PyObject_CallOneArg(hook, p);
|
|
if (importer != NULL)
|
|
break;
|
|
|
|
if (!_PyErr_ExceptionMatches(tstate, PyExc_ImportError)) {
|
|
return NULL;
|
|
}
|
|
_PyErr_Clear(tstate);
|
|
}
|
|
if (importer == NULL) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
if (PyDict_SetItem(path_importer_cache, p, importer) < 0) {
|
|
Py_DECREF(importer);
|
|
return NULL;
|
|
}
|
|
return importer;
|
|
}
|
|
|
|
PyObject *
|
|
PyImport_GetImporter(PyObject *path)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyObject *path_importer_cache = PySys_GetObject("path_importer_cache");
|
|
PyObject *path_hooks = PySys_GetObject("path_hooks");
|
|
if (path_importer_cache == NULL || path_hooks == NULL) {
|
|
return NULL;
|
|
}
|
|
return get_path_importer(tstate, path_importer_cache, path_hooks, path);
|
|
}
|
|
|
|
|
|
/*********************/
|
|
/* importing modules */
|
|
/*********************/
|
|
|
|
int
|
|
_PyImport_InitDefaultImportFunc(PyInterpreterState *interp)
|
|
{
|
|
// Get the __import__ function
|
|
PyObject *import_func = _PyDict_GetItemStringWithError(interp->builtins,
|
|
"__import__");
|
|
if (import_func == NULL) {
|
|
return -1;
|
|
}
|
|
IMPORT_FUNC(interp) = Py_NewRef(import_func);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_PyImport_IsDefaultImportFunc(PyInterpreterState *interp, PyObject *func)
|
|
{
|
|
return func == IMPORT_FUNC(interp);
|
|
}
|
|
|
|
|
|
/* Import a module, either built-in, frozen, or external, and return
|
|
its module object WITH INCREMENTED REFERENCE COUNT */
|
|
|
|
PyObject *
|
|
PyImport_ImportModule(const char *name)
|
|
{
|
|
PyObject *pname;
|
|
PyObject *result;
|
|
|
|
pname = PyUnicode_FromString(name);
|
|
if (pname == NULL)
|
|
return NULL;
|
|
result = PyImport_Import(pname);
|
|
Py_DECREF(pname);
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Import a module without blocking
|
|
*
|
|
* At first it tries to fetch the module from sys.modules. If the module was
|
|
* never loaded before it loads it with PyImport_ImportModule() unless another
|
|
* thread holds the import lock. In the latter case the function raises an
|
|
* ImportError instead of blocking.
|
|
*
|
|
* Returns the module object with incremented ref count.
|
|
*/
|
|
PyObject *
|
|
PyImport_ImportModuleNoBlock(const char *name)
|
|
{
|
|
return PyImport_ImportModule(name);
|
|
}
|
|
|
|
|
|
/* Remove importlib frames from the traceback,
|
|
* except in Verbose mode. */
|
|
static void
|
|
remove_importlib_frames(PyThreadState *tstate)
|
|
{
|
|
const char *importlib_filename = "<frozen importlib._bootstrap>";
|
|
const char *external_filename = "<frozen importlib._bootstrap_external>";
|
|
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(tstate, &exception, &value, &base_tb);
|
|
if (!exception || _PyInterpreterState_GetConfig(tstate->interp)->verbose) {
|
|
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 = PyFrame_GetCode(frame);
|
|
int now_in_importlib;
|
|
|
|
assert(PyTraceBack_Check(tb));
|
|
now_in_importlib = _PyUnicode_EqualToASCIIString(code->co_filename, importlib_filename) ||
|
|
_PyUnicode_EqualToASCIIString(code->co_filename, external_filename);
|
|
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_EqualToASCIIString(code->co_name, remove_frames))) {
|
|
Py_XSETREF(*outer_link, Py_XNewRef(next));
|
|
prev_link = outer_link;
|
|
}
|
|
else {
|
|
prev_link = (PyObject **) &traceback->tb_next;
|
|
}
|
|
Py_DECREF(code);
|
|
tb = next;
|
|
}
|
|
assert(PyExceptionInstance_Check(value));
|
|
assert((PyObject *)Py_TYPE(value) == exception);
|
|
if (base_tb == NULL) {
|
|
base_tb = Py_None;
|
|
Py_INCREF(Py_None);
|
|
}
|
|
PyException_SetTraceback(value, base_tb);
|
|
done:
|
|
_PyErr_Restore(tstate, exception, value, base_tb);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
resolve_name(PyThreadState *tstate, PyObject *name, PyObject *globals, int level)
|
|
{
|
|
PyObject *abs_name;
|
|
PyObject *package = NULL;
|
|
PyObject *spec;
|
|
Py_ssize_t last_dot;
|
|
PyObject *base;
|
|
int level_up;
|
|
|
|
if (globals == NULL) {
|
|
_PyErr_SetString(tstate, PyExc_KeyError, "'__name__' not in globals");
|
|
goto error;
|
|
}
|
|
if (!PyDict_Check(globals)) {
|
|
_PyErr_SetString(tstate, PyExc_TypeError, "globals must be a dict");
|
|
goto error;
|
|
}
|
|
package = PyDict_GetItemWithError(globals, &_Py_ID(__package__));
|
|
if (package == Py_None) {
|
|
package = NULL;
|
|
}
|
|
else if (package == NULL && _PyErr_Occurred(tstate)) {
|
|
goto error;
|
|
}
|
|
spec = PyDict_GetItemWithError(globals, &_Py_ID(__spec__));
|
|
if (spec == NULL && _PyErr_Occurred(tstate)) {
|
|
goto error;
|
|
}
|
|
|
|
if (package != NULL) {
|
|
Py_INCREF(package);
|
|
if (!PyUnicode_Check(package)) {
|
|
_PyErr_SetString(tstate, PyExc_TypeError,
|
|
"package must be a string");
|
|
goto error;
|
|
}
|
|
else if (spec != NULL && spec != Py_None) {
|
|
int equal;
|
|
PyObject *parent = PyObject_GetAttr(spec, &_Py_ID(parent));
|
|
if (parent == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
equal = PyObject_RichCompareBool(package, parent, Py_EQ);
|
|
Py_DECREF(parent);
|
|
if (equal < 0) {
|
|
goto error;
|
|
}
|
|
else if (equal == 0) {
|
|
if (PyErr_WarnEx(PyExc_DeprecationWarning,
|
|
"__package__ != __spec__.parent", 1) < 0) {
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (spec != NULL && spec != Py_None) {
|
|
package = PyObject_GetAttr(spec, &_Py_ID(parent));
|
|
if (package == NULL) {
|
|
goto error;
|
|
}
|
|
else if (!PyUnicode_Check(package)) {
|
|
_PyErr_SetString(tstate, PyExc_TypeError,
|
|
"__spec__.parent must be a string");
|
|
goto error;
|
|
}
|
|
}
|
|
else {
|
|
if (PyErr_WarnEx(PyExc_ImportWarning,
|
|
"can't resolve package from __spec__ or __package__, "
|
|
"falling back on __name__ and __path__", 1) < 0) {
|
|
goto error;
|
|
}
|
|
|
|
package = PyDict_GetItemWithError(globals, &_Py_ID(__name__));
|
|
if (package == NULL) {
|
|
if (!_PyErr_Occurred(tstate)) {
|
|
_PyErr_SetString(tstate, PyExc_KeyError,
|
|
"'__name__' not in globals");
|
|
}
|
|
goto error;
|
|
}
|
|
|
|
Py_INCREF(package);
|
|
if (!PyUnicode_Check(package)) {
|
|
_PyErr_SetString(tstate, PyExc_TypeError,
|
|
"__name__ must be a string");
|
|
goto error;
|
|
}
|
|
|
|
int haspath = PyDict_Contains(globals, &_Py_ID(__path__));
|
|
if (haspath < 0) {
|
|
goto error;
|
|
}
|
|
if (!haspath) {
|
|
Py_ssize_t dot;
|
|
|
|
if (PyUnicode_READY(package) < 0) {
|
|
goto error;
|
|
}
|
|
|
|
dot = PyUnicode_FindChar(package, '.',
|
|
0, PyUnicode_GET_LENGTH(package), -1);
|
|
if (dot == -2) {
|
|
goto error;
|
|
}
|
|
else if (dot == -1) {
|
|
goto no_parent_error;
|
|
}
|
|
PyObject *substr = PyUnicode_Substring(package, 0, dot);
|
|
if (substr == NULL) {
|
|
goto error;
|
|
}
|
|
Py_SETREF(package, substr);
|
|
}
|
|
}
|
|
|
|
last_dot = PyUnicode_GET_LENGTH(package);
|
|
if (last_dot == 0) {
|
|
goto no_parent_error;
|
|
}
|
|
|
|
for (level_up = 1; level_up < level; level_up += 1) {
|
|
last_dot = PyUnicode_FindChar(package, '.', 0, last_dot, -1);
|
|
if (last_dot == -2) {
|
|
goto error;
|
|
}
|
|
else if (last_dot == -1) {
|
|
_PyErr_SetString(tstate, PyExc_ImportError,
|
|
"attempted relative import beyond top-level "
|
|
"package");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
base = PyUnicode_Substring(package, 0, last_dot);
|
|
Py_DECREF(package);
|
|
if (base == NULL || PyUnicode_GET_LENGTH(name) == 0) {
|
|
return base;
|
|
}
|
|
|
|
abs_name = PyUnicode_FromFormat("%U.%U", base, name);
|
|
Py_DECREF(base);
|
|
return abs_name;
|
|
|
|
no_parent_error:
|
|
_PyErr_SetString(tstate, PyExc_ImportError,
|
|
"attempted relative import "
|
|
"with no known parent package");
|
|
|
|
error:
|
|
Py_XDECREF(package);
|
|
return NULL;
|
|
}
|
|
|
|
static PyObject *
|
|
import_find_and_load(PyThreadState *tstate, PyObject *abs_name)
|
|
{
|
|
PyObject *mod = NULL;
|
|
PyInterpreterState *interp = tstate->interp;
|
|
int import_time = _PyInterpreterState_GetConfig(interp)->import_time;
|
|
#define import_level FIND_AND_LOAD.import_level
|
|
#define accumulated FIND_AND_LOAD.accumulated
|
|
|
|
_PyTime_t t1 = 0, accumulated_copy = accumulated;
|
|
|
|
PyObject *sys_path = PySys_GetObject("path");
|
|
PyObject *sys_meta_path = PySys_GetObject("meta_path");
|
|
PyObject *sys_path_hooks = PySys_GetObject("path_hooks");
|
|
if (_PySys_Audit(tstate, "import", "OOOOO",
|
|
abs_name, Py_None, sys_path ? sys_path : Py_None,
|
|
sys_meta_path ? sys_meta_path : Py_None,
|
|
sys_path_hooks ? sys_path_hooks : Py_None) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* XOptions is initialized after first some imports.
|
|
* So we can't have negative cache before completed initialization.
|
|
* Anyway, importlib._find_and_load is much slower than
|
|
* _PyDict_GetItemIdWithError().
|
|
*/
|
|
if (import_time) {
|
|
#define header FIND_AND_LOAD.header
|
|
if (header) {
|
|
fputs("import time: self [us] | cumulative | imported package\n",
|
|
stderr);
|
|
header = 0;
|
|
}
|
|
#undef header
|
|
|
|
import_level++;
|
|
t1 = _PyTime_GetPerfCounter();
|
|
accumulated = 0;
|
|
}
|
|
|
|
if (PyDTrace_IMPORT_FIND_LOAD_START_ENABLED())
|
|
PyDTrace_IMPORT_FIND_LOAD_START(PyUnicode_AsUTF8(abs_name));
|
|
|
|
mod = PyObject_CallMethodObjArgs(IMPORTLIB(interp), &_Py_ID(_find_and_load),
|
|
abs_name, IMPORT_FUNC(interp), NULL);
|
|
|
|
if (PyDTrace_IMPORT_FIND_LOAD_DONE_ENABLED())
|
|
PyDTrace_IMPORT_FIND_LOAD_DONE(PyUnicode_AsUTF8(abs_name),
|
|
mod != NULL);
|
|
|
|
if (import_time) {
|
|
_PyTime_t cum = _PyTime_GetPerfCounter() - t1;
|
|
|
|
import_level--;
|
|
fprintf(stderr, "import time: %9ld | %10ld | %*s%s\n",
|
|
(long)_PyTime_AsMicroseconds(cum - accumulated, _PyTime_ROUND_CEILING),
|
|
(long)_PyTime_AsMicroseconds(cum, _PyTime_ROUND_CEILING),
|
|
import_level*2, "", PyUnicode_AsUTF8(abs_name));
|
|
|
|
accumulated = accumulated_copy + cum;
|
|
}
|
|
|
|
return mod;
|
|
#undef import_level
|
|
#undef accumulated
|
|
}
|
|
|
|
PyObject *
|
|
PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
|
|
PyObject *locals, PyObject *fromlist,
|
|
int level)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyObject *abs_name = NULL;
|
|
PyObject *final_mod = NULL;
|
|
PyObject *mod = NULL;
|
|
PyObject *package = NULL;
|
|
PyInterpreterState *interp = tstate->interp;
|
|
int has_from;
|
|
|
|
if (name == NULL) {
|
|
_PyErr_SetString(tstate, PyExc_ValueError, "Empty module name");
|
|
goto error;
|
|
}
|
|
|
|
/* The below code is importlib.__import__() & _gcd_import(), ported to C
|
|
for added performance. */
|
|
|
|
if (!PyUnicode_Check(name)) {
|
|
_PyErr_SetString(tstate, PyExc_TypeError,
|
|
"module name must be a string");
|
|
goto error;
|
|
}
|
|
if (PyUnicode_READY(name) < 0) {
|
|
goto error;
|
|
}
|
|
if (level < 0) {
|
|
_PyErr_SetString(tstate, PyExc_ValueError, "level must be >= 0");
|
|
goto error;
|
|
}
|
|
|
|
if (level > 0) {
|
|
abs_name = resolve_name(tstate, name, globals, level);
|
|
if (abs_name == NULL)
|
|
goto error;
|
|
}
|
|
else { /* level == 0 */
|
|
if (PyUnicode_GET_LENGTH(name) == 0) {
|
|
_PyErr_SetString(tstate, PyExc_ValueError, "Empty module name");
|
|
goto error;
|
|
}
|
|
abs_name = Py_NewRef(name);
|
|
}
|
|
|
|
mod = import_get_module(tstate, abs_name);
|
|
if (mod == NULL && _PyErr_Occurred(tstate)) {
|
|
goto error;
|
|
}
|
|
|
|
if (mod != NULL && mod != Py_None) {
|
|
if (import_ensure_initialized(tstate->interp, mod, abs_name) < 0) {
|
|
goto error;
|
|
}
|
|
}
|
|
else {
|
|
Py_XDECREF(mod);
|
|
mod = import_find_and_load(tstate, abs_name);
|
|
if (mod == NULL) {
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
has_from = 0;
|
|
if (fromlist != NULL && fromlist != Py_None) {
|
|
has_from = PyObject_IsTrue(fromlist);
|
|
if (has_from < 0)
|
|
goto error;
|
|
}
|
|
if (!has_from) {
|
|
Py_ssize_t len = PyUnicode_GET_LENGTH(name);
|
|
if (level == 0 || len > 0) {
|
|
Py_ssize_t dot;
|
|
|
|
dot = PyUnicode_FindChar(name, '.', 0, len, 1);
|
|
if (dot == -2) {
|
|
goto error;
|
|
}
|
|
|
|
if (dot == -1) {
|
|
/* No dot in module name, simple exit */
|
|
final_mod = Py_NewRef(mod);
|
|
goto error;
|
|
}
|
|
|
|
if (level == 0) {
|
|
PyObject *front = PyUnicode_Substring(name, 0, dot);
|
|
if (front == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
final_mod = PyImport_ImportModuleLevelObject(front, NULL, NULL, NULL, 0);
|
|
Py_DECREF(front);
|
|
}
|
|
else {
|
|
Py_ssize_t cut_off = len - dot;
|
|
Py_ssize_t abs_name_len = PyUnicode_GET_LENGTH(abs_name);
|
|
PyObject *to_return = PyUnicode_Substring(abs_name, 0,
|
|
abs_name_len - cut_off);
|
|
if (to_return == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
final_mod = import_get_module(tstate, to_return);
|
|
Py_DECREF(to_return);
|
|
if (final_mod == NULL) {
|
|
if (!_PyErr_Occurred(tstate)) {
|
|
_PyErr_Format(tstate, PyExc_KeyError,
|
|
"%R not in sys.modules as expected",
|
|
to_return);
|
|
}
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
final_mod = Py_NewRef(mod);
|
|
}
|
|
}
|
|
else {
|
|
PyObject *path;
|
|
if (_PyObject_LookupAttr(mod, &_Py_ID(__path__), &path) < 0) {
|
|
goto error;
|
|
}
|
|
if (path) {
|
|
Py_DECREF(path);
|
|
final_mod = PyObject_CallMethodObjArgs(
|
|
IMPORTLIB(interp), &_Py_ID(_handle_fromlist),
|
|
mod, fromlist, IMPORT_FUNC(interp), NULL);
|
|
}
|
|
else {
|
|
final_mod = Py_NewRef(mod);
|
|
}
|
|
}
|
|
|
|
error:
|
|
Py_XDECREF(abs_name);
|
|
Py_XDECREF(mod);
|
|
Py_XDECREF(package);
|
|
if (final_mod == NULL) {
|
|
remove_importlib_frames(tstate);
|
|
}
|
|
return final_mod;
|
|
}
|
|
|
|
PyObject *
|
|
PyImport_ImportModuleLevel(const char *name, PyObject *globals, PyObject *locals,
|
|
PyObject *fromlist, int level)
|
|
{
|
|
PyObject *nameobj, *mod;
|
|
nameobj = PyUnicode_FromString(name);
|
|
if (nameobj == NULL)
|
|
return NULL;
|
|
mod = PyImport_ImportModuleLevelObject(nameobj, globals, locals,
|
|
fromlist, level);
|
|
Py_DECREF(nameobj);
|
|
return mod;
|
|
}
|
|
|
|
|
|
/* Re-import a module of any kind and return its module object, WITH
|
|
INCREMENTED REFERENCE COUNT */
|
|
|
|
PyObject *
|
|
PyImport_ReloadModule(PyObject *m)
|
|
{
|
|
PyObject *reloaded_module = NULL;
|
|
PyObject *importlib = PyImport_GetModule(&_Py_ID(importlib));
|
|
if (importlib == NULL) {
|
|
if (PyErr_Occurred()) {
|
|
return NULL;
|
|
}
|
|
|
|
importlib = PyImport_ImportModule("importlib");
|
|
if (importlib == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
reloaded_module = PyObject_CallMethodOneArg(importlib, &_Py_ID(reload), m);
|
|
Py_DECREF(importlib);
|
|
return reloaded_module;
|
|
}
|
|
|
|
|
|
/* Higher-level import emulator which emulates the "import" statement
|
|
more accurately -- it invokes the __import__() function from the
|
|
builtins of the current globals. This means that the import is
|
|
done using whatever import hooks are installed in the current
|
|
environment.
|
|
A dummy list ["__doc__"] is passed as the 4th argument so that
|
|
e.g. PyImport_Import(PyUnicode_FromString("win32com.client.gencache"))
|
|
will return <module "gencache"> instead of <module "win32com">. */
|
|
|
|
PyObject *
|
|
PyImport_Import(PyObject *module_name)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyObject *globals = NULL;
|
|
PyObject *import = NULL;
|
|
PyObject *builtins = NULL;
|
|
PyObject *r = NULL;
|
|
|
|
PyObject *from_list = PyList_New(0);
|
|
if (from_list == NULL) {
|
|
goto err;
|
|
}
|
|
|
|
/* Get the builtins from current globals */
|
|
globals = PyEval_GetGlobals();
|
|
if (globals != NULL) {
|
|
Py_INCREF(globals);
|
|
builtins = PyObject_GetItem(globals, &_Py_ID(__builtins__));
|
|
if (builtins == NULL)
|
|
goto err;
|
|
}
|
|
else {
|
|
/* No globals -- use standard builtins, and fake globals */
|
|
builtins = PyImport_ImportModuleLevel("builtins",
|
|
NULL, NULL, NULL, 0);
|
|
if (builtins == NULL) {
|
|
goto err;
|
|
}
|
|
globals = Py_BuildValue("{OO}", &_Py_ID(__builtins__), builtins);
|
|
if (globals == NULL)
|
|
goto err;
|
|
}
|
|
|
|
/* Get the __import__ function from the builtins */
|
|
if (PyDict_Check(builtins)) {
|
|
import = PyObject_GetItem(builtins, &_Py_ID(__import__));
|
|
if (import == NULL) {
|
|
_PyErr_SetObject(tstate, PyExc_KeyError, &_Py_ID(__import__));
|
|
}
|
|
}
|
|
else
|
|
import = PyObject_GetAttr(builtins, &_Py_ID(__import__));
|
|
if (import == NULL)
|
|
goto err;
|
|
|
|
/* Call the __import__ function with the proper argument list
|
|
Always use absolute import here.
|
|
Calling for side-effect of import. */
|
|
r = PyObject_CallFunction(import, "OOOOi", module_name, globals,
|
|
globals, from_list, 0, NULL);
|
|
if (r == NULL)
|
|
goto err;
|
|
Py_DECREF(r);
|
|
|
|
r = import_get_module(tstate, module_name);
|
|
if (r == NULL && !_PyErr_Occurred(tstate)) {
|
|
_PyErr_SetObject(tstate, PyExc_KeyError, module_name);
|
|
}
|
|
|
|
err:
|
|
Py_XDECREF(globals);
|
|
Py_XDECREF(builtins);
|
|
Py_XDECREF(import);
|
|
Py_XDECREF(from_list);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/*********************/
|
|
/* runtime lifecycle */
|
|
/*********************/
|
|
|
|
PyStatus
|
|
_PyImport_Init(void)
|
|
{
|
|
if (INITTAB != NULL) {
|
|
return _PyStatus_ERR("global import state already initialized");
|
|
}
|
|
|
|
PyStatus status = _PyStatus_OK();
|
|
|
|
/* Force default raw memory allocator to get a known allocator to be able
|
|
to release the memory in _PyImport_Fini() */
|
|
PyMemAllocatorEx old_alloc;
|
|
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
|
|
if (init_builtin_modules_table() != 0) {
|
|
status = PyStatus_NoMemory();
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
return status;
|
|
}
|
|
|
|
void
|
|
_PyImport_Fini(void)
|
|
{
|
|
/* Destroy the database used by _PyImport_{Fixup,Find}Extension */
|
|
_extensions_cache_clear();
|
|
if (import_lock != NULL) {
|
|
PyThread_free_lock(import_lock);
|
|
import_lock = NULL;
|
|
}
|
|
|
|
/* Use the same memory allocator as _PyImport_Init(). */
|
|
PyMemAllocatorEx old_alloc;
|
|
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
|
|
/* Free memory allocated by _PyImport_Init() */
|
|
fini_builtin_modules_table();
|
|
|
|
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
}
|
|
|
|
void
|
|
_PyImport_Fini2(void)
|
|
{
|
|
/* Use the same memory allocator than PyImport_ExtendInittab(). */
|
|
PyMemAllocatorEx old_alloc;
|
|
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
|
|
// Reset PyImport_Inittab
|
|
PyImport_Inittab = _PyImport_Inittab;
|
|
|
|
/* Free memory allocated by PyImport_ExtendInittab() */
|
|
PyMem_RawFree(inittab_copy);
|
|
inittab_copy = NULL;
|
|
|
|
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
|
|
}
|
|
|
|
|
|
/*************************/
|
|
/* interpreter lifecycle */
|
|
/*************************/
|
|
|
|
PyStatus
|
|
_PyImport_InitCore(PyThreadState *tstate, PyObject *sysmod, int importlib)
|
|
{
|
|
// XXX Initialize here: interp->modules and interp->import_func.
|
|
// XXX Initialize here: sys.modules and sys.meta_path.
|
|
|
|
if (importlib) {
|
|
/* This call sets up builtin and frozen import support */
|
|
if (init_importlib(tstate, sysmod) < 0) {
|
|
return _PyStatus_ERR("failed to initialize importlib");
|
|
}
|
|
}
|
|
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* In some corner cases it is important to be sure that the import
|
|
machinery has been initialized (or not cleaned up yet). For
|
|
example, see issue #4236 and PyModule_Create2(). */
|
|
|
|
int
|
|
_PyImport_IsInitialized(PyInterpreterState *interp)
|
|
{
|
|
if (MODULES(interp) == NULL)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/* Clear the direct per-interpreter import state, if not cleared already. */
|
|
void
|
|
_PyImport_ClearCore(PyInterpreterState *interp)
|
|
{
|
|
/* interp->modules should have been cleaned up and cleared already
|
|
by _PyImport_FiniCore(). */
|
|
Py_CLEAR(MODULES(interp));
|
|
Py_CLEAR(MODULES_BY_INDEX(interp));
|
|
Py_CLEAR(IMPORTLIB(interp));
|
|
Py_CLEAR(IMPORT_FUNC(interp));
|
|
}
|
|
|
|
void
|
|
_PyImport_FiniCore(PyInterpreterState *interp)
|
|
{
|
|
int verbose = _PyInterpreterState_GetConfig(interp)->verbose;
|
|
|
|
if (_PySys_ClearAttrString(interp, "meta_path", verbose) < 0) {
|
|
PyErr_WriteUnraisable(NULL);
|
|
}
|
|
|
|
// XXX Pull in most of finalize_modules() in pylifecycle.c.
|
|
|
|
if (_PySys_ClearAttrString(interp, "modules", verbose) < 0) {
|
|
PyErr_WriteUnraisable(NULL);
|
|
}
|
|
|
|
_PyImport_ClearCore(interp);
|
|
}
|
|
|
|
// XXX Add something like _PyImport_Disable() for use early in interp fini?
|
|
|
|
|
|
/* "external" imports */
|
|
|
|
static int
|
|
init_zipimport(PyThreadState *tstate, int verbose)
|
|
{
|
|
PyObject *path_hooks = PySys_GetObject("path_hooks");
|
|
if (path_hooks == NULL) {
|
|
_PyErr_SetString(tstate, PyExc_RuntimeError,
|
|
"unable to get sys.path_hooks");
|
|
return -1;
|
|
}
|
|
|
|
if (verbose) {
|
|
PySys_WriteStderr("# installing zipimport hook\n");
|
|
}
|
|
|
|
PyObject *zipimporter = _PyImport_GetModuleAttrString("zipimport", "zipimporter");
|
|
if (zipimporter == NULL) {
|
|
_PyErr_Clear(tstate); /* No zipimporter object -- okay */
|
|
if (verbose) {
|
|
PySys_WriteStderr("# can't import zipimport.zipimporter\n");
|
|
}
|
|
}
|
|
else {
|
|
/* sys.path_hooks.insert(0, zipimporter) */
|
|
int err = PyList_Insert(path_hooks, 0, zipimporter);
|
|
Py_DECREF(zipimporter);
|
|
if (err < 0) {
|
|
return -1;
|
|
}
|
|
if (verbose) {
|
|
PySys_WriteStderr("# installed zipimport hook\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
PyStatus
|
|
_PyImport_InitExternal(PyThreadState *tstate)
|
|
{
|
|
int verbose = _PyInterpreterState_GetConfig(tstate->interp)->verbose;
|
|
|
|
// XXX Initialize here: sys.path_hooks and sys.path_importer_cache.
|
|
|
|
if (init_importlib_external(tstate->interp) != 0) {
|
|
_PyErr_Print(tstate);
|
|
return _PyStatus_ERR("external importer setup failed");
|
|
}
|
|
|
|
if (init_zipimport(tstate, verbose) != 0) {
|
|
PyErr_Print();
|
|
return _PyStatus_ERR("initializing zipimport failed");
|
|
}
|
|
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
void
|
|
_PyImport_FiniExternal(PyInterpreterState *interp)
|
|
{
|
|
int verbose = _PyInterpreterState_GetConfig(interp)->verbose;
|
|
|
|
// XXX Uninstall importlib metapath importers here?
|
|
|
|
if (_PySys_ClearAttrString(interp, "path_importer_cache", verbose) < 0) {
|
|
PyErr_WriteUnraisable(NULL);
|
|
}
|
|
if (_PySys_ClearAttrString(interp, "path_hooks", verbose) < 0) {
|
|
PyErr_WriteUnraisable(NULL);
|
|
}
|
|
}
|
|
|
|
|
|
/******************/
|
|
/* module helpers */
|
|
/******************/
|
|
|
|
PyObject *
|
|
_PyImport_GetModuleAttr(PyObject *modname, PyObject *attrname)
|
|
{
|
|
PyObject *mod = PyImport_Import(modname);
|
|
if (mod == NULL) {
|
|
return NULL;
|
|
}
|
|
PyObject *result = PyObject_GetAttr(mod, attrname);
|
|
Py_DECREF(mod);
|
|
return result;
|
|
}
|
|
|
|
PyObject *
|
|
_PyImport_GetModuleAttrString(const char *modname, const char *attrname)
|
|
{
|
|
PyObject *pmodname = PyUnicode_FromString(modname);
|
|
if (pmodname == NULL) {
|
|
return NULL;
|
|
}
|
|
PyObject *pattrname = PyUnicode_FromString(attrname);
|
|
if (pattrname == NULL) {
|
|
Py_DECREF(pmodname);
|
|
return NULL;
|
|
}
|
|
PyObject *result = _PyImport_GetModuleAttr(pmodname, pattrname);
|
|
Py_DECREF(pattrname);
|
|
Py_DECREF(pmodname);
|
|
return result;
|
|
}
|
|
|
|
|
|
/**************/
|
|
/* the module */
|
|
/**************/
|
|
|
|
/*[clinic input]
|
|
_imp.lock_held
|
|
|
|
Return True if the import lock is currently held, else False.
|
|
|
|
On platforms without threads, return False.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_lock_held_impl(PyObject *module)
|
|
/*[clinic end generated code: output=8b89384b5e1963fc input=9b088f9b217d9bdf]*/
|
|
{
|
|
return PyBool_FromLong(import_lock_thread != PYTHREAD_INVALID_THREAD_ID);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.acquire_lock
|
|
|
|
Acquires the interpreter's import lock for the current thread.
|
|
|
|
This lock should be used by import hooks to ensure thread-safety when importing
|
|
modules. On platforms without threads, this function does nothing.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_acquire_lock_impl(PyObject *module)
|
|
/*[clinic end generated code: output=1aff58cb0ee1b026 input=4a2d4381866d5fdc]*/
|
|
{
|
|
_PyImport_AcquireLock();
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.release_lock
|
|
|
|
Release the interpreter's import lock.
|
|
|
|
On platforms without threads, this function does nothing.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_release_lock_impl(PyObject *module)
|
|
/*[clinic end generated code: output=7faab6d0be178b0a input=934fb11516dd778b]*/
|
|
{
|
|
if (_PyImport_ReleaseLock() < 0) {
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"not holding the import lock");
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_imp._fix_co_filename
|
|
|
|
code: object(type="PyCodeObject *", subclass_of="&PyCode_Type")
|
|
Code object to change.
|
|
|
|
path: unicode
|
|
File path to use.
|
|
/
|
|
|
|
Changes code.co_filename to specify the passed-in file path.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp__fix_co_filename_impl(PyObject *module, PyCodeObject *code,
|
|
PyObject *path)
|
|
/*[clinic end generated code: output=1d002f100235587d input=895ba50e78b82f05]*/
|
|
|
|
{
|
|
update_compiled_module(code, path);
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_imp.create_builtin
|
|
|
|
spec: object
|
|
/
|
|
|
|
Create an extension module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_create_builtin(PyObject *module, PyObject *spec)
|
|
/*[clinic end generated code: output=ace7ff22271e6f39 input=37f966f890384e47]*/
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
|
|
PyObject *name = PyObject_GetAttrString(spec, "name");
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!PyUnicode_Check(name)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"name must be string, not %.200s",
|
|
Py_TYPE(name)->tp_name);
|
|
Py_DECREF(name);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *mod = create_builtin(tstate, name, spec);
|
|
Py_DECREF(name);
|
|
return mod;
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
_imp.extension_suffixes
|
|
|
|
Returns the list of file suffixes used to identify extension modules.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_extension_suffixes_impl(PyObject *module)
|
|
/*[clinic end generated code: output=0bf346e25a8f0cd3 input=ecdeeecfcb6f839e]*/
|
|
{
|
|
PyObject *list;
|
|
|
|
list = PyList_New(0);
|
|
if (list == NULL)
|
|
return NULL;
|
|
#ifdef HAVE_DYNAMIC_LOADING
|
|
const char *suffix;
|
|
unsigned int index = 0;
|
|
|
|
while ((suffix = _PyImport_DynLoadFiletab[index])) {
|
|
PyObject *item = PyUnicode_FromString(suffix);
|
|
if (item == NULL) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
}
|
|
if (PyList_Append(list, item) < 0) {
|
|
Py_DECREF(list);
|
|
Py_DECREF(item);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(item);
|
|
index += 1;
|
|
}
|
|
#endif
|
|
return list;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.init_frozen
|
|
|
|
name: unicode
|
|
/
|
|
|
|
Initializes a frozen module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_init_frozen_impl(PyObject *module, PyObject *name)
|
|
/*[clinic end generated code: output=fc0511ed869fd69c input=13019adfc04f3fb3]*/
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
int ret;
|
|
|
|
ret = PyImport_ImportFrozenModuleObject(name);
|
|
if (ret < 0)
|
|
return NULL;
|
|
if (ret == 0) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return import_add_module(tstate, name);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.find_frozen
|
|
|
|
name: unicode
|
|
/
|
|
*
|
|
withdata: bool = False
|
|
|
|
Return info about the corresponding frozen module (if there is one) or None.
|
|
|
|
The returned info (a 2-tuple):
|
|
|
|
* data the raw marshalled bytes
|
|
* is_package whether or not it is a package
|
|
* origname the originally frozen module's name, or None if not
|
|
a stdlib module (this will usually be the same as
|
|
the module's current name)
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_find_frozen_impl(PyObject *module, PyObject *name, int withdata)
|
|
/*[clinic end generated code: output=8c1c3c7f925397a5 input=22a8847c201542fd]*/
|
|
{
|
|
struct frozen_info info;
|
|
frozen_status status = find_frozen(name, &info);
|
|
if (status == FROZEN_NOT_FOUND || status == FROZEN_DISABLED) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
else if (status == FROZEN_BAD_NAME) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
else if (status != FROZEN_OKAY) {
|
|
set_frozen_error(status, name);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *data = NULL;
|
|
if (withdata) {
|
|
data = PyMemoryView_FromMemory((char *)info.data, info.size, PyBUF_READ);
|
|
if (data == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
PyObject *origname = NULL;
|
|
if (info.origname != NULL && info.origname[0] != '\0') {
|
|
origname = PyUnicode_FromString(info.origname);
|
|
if (origname == NULL) {
|
|
Py_DECREF(data);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
PyObject *result = PyTuple_Pack(3, data ? data : Py_None,
|
|
info.is_package ? Py_True : Py_False,
|
|
origname ? origname : Py_None);
|
|
Py_XDECREF(origname);
|
|
Py_XDECREF(data);
|
|
return result;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.get_frozen_object
|
|
|
|
name: unicode
|
|
data as dataobj: object = None
|
|
/
|
|
|
|
Create a code object for a frozen module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_get_frozen_object_impl(PyObject *module, PyObject *name,
|
|
PyObject *dataobj)
|
|
/*[clinic end generated code: output=54368a673a35e745 input=034bdb88f6460b7b]*/
|
|
{
|
|
struct frozen_info info = {0};
|
|
Py_buffer buf = {0};
|
|
if (PyObject_CheckBuffer(dataobj)) {
|
|
if (PyObject_GetBuffer(dataobj, &buf, PyBUF_READ) != 0) {
|
|
return NULL;
|
|
}
|
|
info.data = (const char *)buf.buf;
|
|
info.size = buf.len;
|
|
}
|
|
else if (dataobj != Py_None) {
|
|
_PyArg_BadArgument("get_frozen_object", "argument 2", "bytes", dataobj);
|
|
return NULL;
|
|
}
|
|
else {
|
|
frozen_status status = find_frozen(name, &info);
|
|
if (status != FROZEN_OKAY) {
|
|
set_frozen_error(status, name);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (info.nameobj == NULL) {
|
|
info.nameobj = name;
|
|
}
|
|
if (info.size == 0 && info.get_code == NULL) {
|
|
/* Does not contain executable code. */
|
|
set_frozen_error(FROZEN_INVALID, name);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *codeobj = unmarshal_frozen_code(&info);
|
|
if (dataobj != Py_None) {
|
|
PyBuffer_Release(&buf);
|
|
}
|
|
return codeobj;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.is_frozen_package
|
|
|
|
name: unicode
|
|
/
|
|
|
|
Returns True if the module name is of a frozen package.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_is_frozen_package_impl(PyObject *module, PyObject *name)
|
|
/*[clinic end generated code: output=e70cbdb45784a1c9 input=81b6cdecd080fbb8]*/
|
|
{
|
|
struct frozen_info info;
|
|
frozen_status status = find_frozen(name, &info);
|
|
if (status != FROZEN_OKAY && status != FROZEN_EXCLUDED) {
|
|
set_frozen_error(status, name);
|
|
return NULL;
|
|
}
|
|
return PyBool_FromLong(info.is_package);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.is_builtin
|
|
|
|
name: unicode
|
|
/
|
|
|
|
Returns True if the module name corresponds to a built-in module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_is_builtin_impl(PyObject *module, PyObject *name)
|
|
/*[clinic end generated code: output=3bfd1162e2d3be82 input=86befdac021dd1c7]*/
|
|
{
|
|
return PyLong_FromLong(is_builtin(name));
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.is_frozen
|
|
|
|
name: unicode
|
|
/
|
|
|
|
Returns True if the module name corresponds to a frozen module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_is_frozen_impl(PyObject *module, PyObject *name)
|
|
/*[clinic end generated code: output=01f408f5ec0f2577 input=7301dbca1897d66b]*/
|
|
{
|
|
struct frozen_info info;
|
|
frozen_status status = find_frozen(name, &info);
|
|
if (status != FROZEN_OKAY) {
|
|
Py_RETURN_FALSE;
|
|
}
|
|
Py_RETURN_TRUE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp._frozen_module_names
|
|
|
|
Returns the list of available frozen modules.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp__frozen_module_names_impl(PyObject *module)
|
|
/*[clinic end generated code: output=80609ef6256310a8 input=76237fbfa94460d2]*/
|
|
{
|
|
return list_frozen_module_names();
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp._override_frozen_modules_for_tests
|
|
|
|
override: int
|
|
/
|
|
|
|
(internal-only) Override PyConfig.use_frozen_modules.
|
|
|
|
(-1: "off", 1: "on", 0: no override)
|
|
See frozen_modules() in Lib/test/support/import_helper.py.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp__override_frozen_modules_for_tests_impl(PyObject *module, int override)
|
|
/*[clinic end generated code: output=36d5cb1594160811 input=8f1f95a3ef21aec3]*/
|
|
{
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
OVERRIDE_FROZEN_MODULES(interp) = override;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
#ifdef HAVE_DYNAMIC_LOADING
|
|
|
|
/*[clinic input]
|
|
_imp.create_dynamic
|
|
|
|
spec: object
|
|
file: object = NULL
|
|
/
|
|
|
|
Create an extension module.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file)
|
|
/*[clinic end generated code: output=83249b827a4fde77 input=c31b954f4cf4e09d]*/
|
|
{
|
|
PyObject *mod, *name, *path;
|
|
FILE *fp;
|
|
|
|
name = PyObject_GetAttrString(spec, "name");
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
path = PyObject_GetAttrString(spec, "origin");
|
|
if (path == NULL) {
|
|
Py_DECREF(name);
|
|
return NULL;
|
|
}
|
|
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
mod = import_find_extension(tstate, name, path);
|
|
if (mod != NULL || PyErr_Occurred()) {
|
|
Py_DECREF(name);
|
|
Py_DECREF(path);
|
|
return mod;
|
|
}
|
|
|
|
if (file != NULL) {
|
|
fp = _Py_fopen_obj(path, "r");
|
|
if (fp == NULL) {
|
|
Py_DECREF(name);
|
|
Py_DECREF(path);
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
fp = NULL;
|
|
|
|
mod = _PyImport_LoadDynamicModuleWithSpec(spec, fp);
|
|
|
|
Py_DECREF(name);
|
|
Py_DECREF(path);
|
|
if (fp)
|
|
fclose(fp);
|
|
return mod;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.exec_dynamic -> int
|
|
|
|
mod: object
|
|
/
|
|
|
|
Initialize an extension module.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_imp_exec_dynamic_impl(PyObject *module, PyObject *mod)
|
|
/*[clinic end generated code: output=f5720ac7b465877d input=9fdbfcb250280d3a]*/
|
|
{
|
|
return exec_builtin_or_dynamic(mod);
|
|
}
|
|
|
|
|
|
#endif /* HAVE_DYNAMIC_LOADING */
|
|
|
|
/*[clinic input]
|
|
_imp.exec_builtin -> int
|
|
|
|
mod: object
|
|
/
|
|
|
|
Initialize a built-in module.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_imp_exec_builtin_impl(PyObject *module, PyObject *mod)
|
|
/*[clinic end generated code: output=0262447b240c038e input=7beed5a2f12a60ca]*/
|
|
{
|
|
return exec_builtin_or_dynamic(mod);
|
|
}
|
|
|
|
/*[clinic input]
|
|
_imp.source_hash
|
|
|
|
key: long
|
|
source: Py_buffer
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_imp_source_hash_impl(PyObject *module, long key, Py_buffer *source)
|
|
/*[clinic end generated code: output=edb292448cf399ea input=9aaad1e590089789]*/
|
|
{
|
|
union {
|
|
uint64_t x;
|
|
char data[sizeof(uint64_t)];
|
|
} hash;
|
|
hash.x = _Py_KeyedHash((uint64_t)key, source->buf, source->len);
|
|
#if !PY_LITTLE_ENDIAN
|
|
// Force to little-endian. There really ought to be a succinct standard way
|
|
// to do this.
|
|
for (size_t i = 0; i < sizeof(hash.data)/2; i++) {
|
|
char tmp = hash.data[i];
|
|
hash.data[i] = hash.data[sizeof(hash.data) - i - 1];
|
|
hash.data[sizeof(hash.data) - i - 1] = tmp;
|
|
}
|
|
#endif
|
|
return PyBytes_FromStringAndSize(hash.data, sizeof(hash.data));
|
|
}
|
|
|
|
|
|
PyDoc_STRVAR(doc_imp,
|
|
"(Extremely) low-level import machinery bits as used by importlib and imp.");
|
|
|
|
static PyMethodDef imp_methods[] = {
|
|
_IMP_EXTENSION_SUFFIXES_METHODDEF
|
|
_IMP_LOCK_HELD_METHODDEF
|
|
_IMP_ACQUIRE_LOCK_METHODDEF
|
|
_IMP_RELEASE_LOCK_METHODDEF
|
|
_IMP_FIND_FROZEN_METHODDEF
|
|
_IMP_GET_FROZEN_OBJECT_METHODDEF
|
|
_IMP_IS_FROZEN_PACKAGE_METHODDEF
|
|
_IMP_CREATE_BUILTIN_METHODDEF
|
|
_IMP_INIT_FROZEN_METHODDEF
|
|
_IMP_IS_BUILTIN_METHODDEF
|
|
_IMP_IS_FROZEN_METHODDEF
|
|
_IMP__FROZEN_MODULE_NAMES_METHODDEF
|
|
_IMP__OVERRIDE_FROZEN_MODULES_FOR_TESTS_METHODDEF
|
|
_IMP_CREATE_DYNAMIC_METHODDEF
|
|
_IMP_EXEC_DYNAMIC_METHODDEF
|
|
_IMP_EXEC_BUILTIN_METHODDEF
|
|
_IMP__FIX_CO_FILENAME_METHODDEF
|
|
_IMP_SOURCE_HASH_METHODDEF
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
|
|
static int
|
|
imp_module_exec(PyObject *module)
|
|
{
|
|
const wchar_t *mode = _Py_GetConfig()->check_hash_pycs_mode;
|
|
PyObject *pyc_mode = PyUnicode_FromWideChar(mode, -1);
|
|
if (pyc_mode == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyModule_AddObjectRef(module, "check_hash_based_pycs", pyc_mode) < 0) {
|
|
Py_DECREF(pyc_mode);
|
|
return -1;
|
|
}
|
|
Py_DECREF(pyc_mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static PyModuleDef_Slot imp_slots[] = {
|
|
{Py_mod_exec, imp_module_exec},
|
|
{0, NULL}
|
|
};
|
|
|
|
static struct PyModuleDef imp_module = {
|
|
PyModuleDef_HEAD_INIT,
|
|
.m_name = "_imp",
|
|
.m_doc = doc_imp,
|
|
.m_size = 0,
|
|
.m_methods = imp_methods,
|
|
.m_slots = imp_slots,
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__imp(void)
|
|
{
|
|
return PyModuleDef_Init(&imp_module);
|
|
}
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|