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bpo-31404: Revert "remove modules from Py_InterpreterState (#1638)" (#3565)

Browse Source 
PR #1638, for bpo-28411, causes problems in some (very) edge cases. Until that gets sorted out, we're reverting the merge. PR #3506, a fix on top of #1638, is also getting reverted.
This commit is contained in:
Eric Snow 2017-09-13 23:46:04 -07:00 committed by GitHub
parent 13ad3b7a82
commit 93c92f7d1d
21 changed files with 154 additions and 308 deletions
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7
Doc/c-api/import.rst
View File

@ -204,13 +204,6 @@ Importing Modules
Return the dictionary used for the module administration (a.k.a.
``sys.modules``). Note that this is a per-interpreter variable.
.. c:function:: PyObject* PyImport_GetModule(PyObject *name)
Return the already imported module with the given name. If the
module has not been imported yet then returns NULL but does not set
an error. Returns NULL and sets an error if the lookup failed.
.. versionadded:: 3.7
.. c:function:: PyObject* PyImport_GetImporter(PyObject *path)

3
Doc/whatsnew/3.7.rst
View File

@ -486,9 +486,6 @@ Changes in the Python API
and module are affected by this change. (Contributed by INADA Naoki and
Eugene Toder in :issue:`29463`.)
* ``PyInterpreterState`` no longer has a ``modules`` field. Instead use
``sys.modules``.
* The *mode* argument of :func:`os.makedirs` no longer affects the file
permission bits of newly-created intermediate-level directories.
To set their file permission bits you can set the umask before invoking

25
Include/import.h
View File

@ -38,25 +38,11 @@ PyAPI_FUNC(PyObject *) PyImport_ExecCodeModuleObject(
);
#endif
PyAPI_FUNC(PyObject *) PyImport_GetModuleDict(void);
#ifndef Py_LIMITED_API
PyAPI_FUNC(int) _PyImport_IsInitialized(PyInterpreterState *);
#endif
PyAPI_FUNC(PyObject *) PyImport_GetModule(PyObject *name);
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _PyImport_GetModule(PyObject *name);
PyAPI_FUNC(PyObject *) _PyImport_GetModuleWithError(PyObject *name);
PyAPI_FUNC(PyObject *) _PyImport_GetModuleId(struct _Py_Identifier *name);
PyAPI_FUNC(int) _PyImport_SetModule(PyObject *name, PyObject *module);
PyAPI_FUNC(int) _PyImport_SetModuleString(const char *name, PyObject* module);
#endif
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
PyAPI_FUNC(PyObject *) PyImport_AddModuleObject(
PyObject *name
);
#endif
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _PyImport_AddModuleObject(PyObject *, PyObject *);
#endif
PyAPI_FUNC(PyObject *) PyImport_AddModule(
const char *name /* UTF-8 encoded string */
);
@ -106,19 +92,14 @@ PyAPI_FUNC(int) _PyImport_ReleaseLock(void);
PyAPI_FUNC(void) _PyImport_ReInitLock(void);
PyAPI_FUNC(PyObject *) _PyImport_FindBuiltin(
const char *name, /* UTF-8 encoded string */
PyObject *modules
const char *name /* UTF-8 encoded string */
);
PyAPI_FUNC(PyObject *) _PyImport_FindExtensionObject(PyObject *, PyObject *);
PyAPI_FUNC(PyObject *) _PyImport_FindExtensionObjectEx(PyObject *, PyObject *,
PyObject *);
PyAPI_FUNC(int) _PyImport_FixupBuiltin(
PyObject *mod,
const char *name, /* UTF-8 encoded string */
PyObject *modules
const char *name /* UTF-8 encoded string */
);
PyAPI_FUNC(int) _PyImport_FixupExtensionObject(PyObject*, PyObject *,
PyObject *, PyObject *);
PyAPI_FUNC(int) _PyImport_FixupExtensionObject(PyObject*, PyObject *, PyObject *);
struct _inittab {
const char *name; /* ASCII encoded string */

4
Include/modsupport.h
View File

@ -191,10 +191,6 @@ PyAPI_FUNC(int) PyModule_ExecDef(PyObject *module, PyModuleDef *def);
PyAPI_FUNC(PyObject *) PyModule_Create2(struct PyModuleDef*,
int apiver);
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _PyModule_CreateInitialized(struct PyModuleDef*,
int apiver);
#endif
#ifdef Py_LIMITED_API
#define PyModule_Create(module) \

3
Include/object.h
View File

@ -727,13 +727,14 @@ PyAPI_FUNC(Py_ssize_t) _Py_GetRefTotal(void);
/* Py_REF_DEBUG also controls the display of refcounts and memory block
* allocations at the interactive prompt and at interpreter shutdown
*/
PyAPI_FUNC(PyObject *) _PyDebug_XOptionShowRefCount(void);
PyAPI_FUNC(void) _PyDebug_PrintTotalRefs(void);
#define _PY_DEBUG_PRINT_TOTAL_REFS() _PyDebug_PrintTotalRefs()
#else
#define _Py_INC_REFTOTAL
#define _Py_DEC_REFTOTAL
#define _Py_REF_DEBUG_COMMA
#define _Py_CHECK_REFCNT(OP) /* a semicolon */;
#define _PY_DEBUG_PRINT_TOTAL_REFS()
#endif /* Py_REF_DEBUG */
#ifdef COUNT_ALLOCS

3
Include/pystate.h
View File

@ -53,6 +53,7 @@ typedef struct _is {
int64_t id;
PyObject *modules;
PyObject *modules_by_index;
PyObject *sysdict;
PyObject *builtins;
@ -60,6 +61,8 @@ typedef struct _is {
/* Used in Python/sysmodule.c. */
int check_interval;
PyObject *warnoptions;
PyObject *xoptions;
/* Used in Modules/_threadmodule.c. */
long num_threads;

4
Misc/NEWS.d/next/Core and Builtins/2017-09-04-10-46-09.bpo-28411.IU9rQL.rst
View File

@ -1,4 +0,0 @@
``PyInterpreterState`` has a "modules" field that is copied into
``sys.modules`` during interpreter startup. This causes problems if a
program replaces ``sys.modules`` with something else. To solve this we
eliminate ``PyInterpreterState.modules``.

12
Modules/_pickle.c
View File

@ -6425,7 +6425,9 @@ _pickle_Unpickler_find_class_impl(UnpicklerObject *self,
/*[clinic end generated code: output=becc08d7f9ed41e3 input=e2e6a865de093ef4]*/
{
PyObject *global;
PyObject *modules_dict;
PyObject *module;
_Py_IDENTIFIER(modules);
/* Try to map the old names used in Python 2.x to the new ones used in
Python 3.x. We do this only with old pickle protocols and when the
@ -6482,7 +6484,13 @@ _pickle_Unpickler_find_class_impl(UnpicklerObject *self,
}
}
module = PyImport_GetModule(module_name);
modules_dict = _PySys_GetObjectId(&PyId_modules);
if (modules_dict == NULL) {
PyErr_SetString(PyExc_RuntimeError, "unable to get sys.modules");
return NULL;
}
module = PyDict_GetItemWithError(modules_dict, module_name);
if (module == NULL) {
if (PyErr_Occurred())
return NULL;
@ -6490,11 +6498,11 @@ _pickle_Unpickler_find_class_impl(UnpicklerObject *self,
if (module == NULL)
return NULL;
global = getattribute(module, global_name, self->proto >= 4);
Py_DECREF(module);
}
else {
global = getattribute(module, global_name, self->proto >= 4);
}
Py_DECREF(module);
return global;
}

10
Modules/pyexpat.c
View File

@ -1643,6 +1643,7 @@ MODULE_INITFUNC(void)
PyObject *errors_module;
PyObject *modelmod_name;
PyObject *model_module;
PyObject *sys_modules;
PyObject *tmpnum, *tmpstr;
PyObject *codes_dict;
PyObject *rev_codes_dict;
@ -1692,6 +1693,11 @@ MODULE_INITFUNC(void)
*/
PyModule_AddStringConstant(m, "native_encoding", "UTF-8");
sys_modules = PySys_GetObject("modules");
if (sys_modules == NULL) {
Py_DECREF(m);
return NULL;
}
d = PyModule_GetDict(m);
if (d == NULL) {
Py_DECREF(m);
@ -1701,7 +1707,7 @@ MODULE_INITFUNC(void)
if (errors_module == NULL) {
errors_module = PyModule_New(MODULE_NAME ".errors");
if (errors_module != NULL) {
_PyImport_SetModule(errmod_name, errors_module);
PyDict_SetItem(sys_modules, errmod_name, errors_module);
/* gives away the reference to errors_module */
PyModule_AddObject(m, "errors", errors_module);
}
@ -1711,7 +1717,7 @@ MODULE_INITFUNC(void)
if (model_module == NULL) {
model_module = PyModule_New(MODULE_NAME ".model");
if (model_module != NULL) {
_PyImport_SetModule(modelmod_name, model_module);
PyDict_SetItem(sys_modules, modelmod_name, model_module);
/* gives away the reference to model_module */
PyModule_AddObject(m, "model", model_module);
}

12
Objects/moduleobject.c
View File

@ -161,18 +161,12 @@ _add_methods_to_object(PyObject *module, PyObject *name, PyMethodDef *functions)
PyObject *
PyModule_Create2(struct PyModuleDef* module, int module_api_version)
{
if (!_PyImport_IsInitialized(PyThreadState_GET()->interp))
Py_FatalError("Python import machinery not initialized");
return _PyModule_CreateInitialized(module, module_api_version);
}
PyObject *
_PyModule_CreateInitialized(struct PyModuleDef* module, int module_api_version)
{
const char* name;
PyModuleObject *m;
PyInterpreterState *interp = PyThreadState_Get()->interp;
if (interp->modules == NULL)
Py_FatalError("Python import machinery not initialized");
if (!PyModuleDef_Init(module))
return NULL;
name = module->m_name;

27
Objects/object.c
View File

@ -29,23 +29,20 @@ _Py_GetRefTotal(void)
return total;
}
PyObject *
_PyDebug_XOptionShowRefCount(void)
{
PyObject *xoptions = PySys_GetXOptions();
if (xoptions == NULL)
return NULL;
_Py_IDENTIFIER(showrefcount);
return _PyDict_GetItemId(xoptions, &PyId_showrefcount);
}
void
_PyDebug_PrintTotalRefs(void) {
fprintf(stderr,
"[%" PY_FORMAT_SIZE_T "d refs, "
"%" PY_FORMAT_SIZE_T "d blocks]\n",
_Py_GetRefTotal(), _Py_GetAllocatedBlocks());
PyObject *xoptions, *value;
_Py_IDENTIFIER(showrefcount);
xoptions = PySys_GetXOptions();
if (xoptions == NULL)
return;
value = _PyDict_GetItemId(xoptions, &PyId_showrefcount);
if (value == Py_True)
fprintf(stderr,
"[%" PY_FORMAT_SIZE_T "d refs, "
"%" PY_FORMAT_SIZE_T "d blocks]\n",
_Py_GetRefTotal(), _Py_GetAllocatedBlocks());
}
#endif /* Py_REF_DEBUG */

3
Objects/typeobject.c
View File

@ -3902,6 +3902,7 @@ import_copyreg(void)
{
PyObject *copyreg_str;
PyObject *copyreg_module;
PyInterpreterState *interp = PyThreadState_GET()->interp;
_Py_IDENTIFIER(copyreg);
copyreg_str = _PyUnicode_FromId(&PyId_copyreg);
@ -3913,7 +3914,7 @@ import_copyreg(void)
by storing a reference to the cached module in a static variable, but
this broke when multiple embedded interpreters were in use (see issue
#17408 and #19088). */
copyreg_module = _PyImport_GetModuleWithError(copyreg_str);
copyreg_module = PyDict_GetItemWithError(interp->modules, copyreg_str);
if (copyreg_module != NULL) {
Py_INCREF(copyreg_module);
return copyreg_module;

5
Python/_warnings.c
View File

@ -38,6 +38,7 @@ static PyObject *
get_warnings_attr(const char *attr, int try_import)
{
static PyObject *warnings_str = NULL;
PyObject *all_modules;
PyObject *warnings_module, *obj;
if (warnings_str == NULL) {
@ -57,7 +58,9 @@ get_warnings_attr(const char *attr, int try_import)
}
}
else {
warnings_module = _PyImport_GetModule(warnings_str);
all_modules = PyImport_GetModuleDict();
warnings_module = PyDict_GetItem(all_modules, warnings_str);
if (warnings_module == NULL)
return NULL;

2
Python/bltinmodule.c
View File

@ -2685,7 +2685,7 @@ _PyBuiltin_Init(void)
PyType_Ready(&PyZip_Type) < 0)
return NULL;
mod = _PyModule_CreateInitialized(&builtinsmodule, PYTHON_API_VERSION);
mod = PyModule_Create(&builtinsmodule);
if (mod == NULL)
return NULL;
dict = PyModule_GetDict(mod);

2
Python/ceval.c
View File

@ -4935,7 +4935,7 @@ import_from(PyObject *v, PyObject *name)
Py_DECREF(pkgname);
return NULL;
}
x = _PyImport_GetModule(fullmodname);
x = PyDict_GetItem(PyImport_GetModuleDict(), fullmodname);
Py_DECREF(fullmodname);
if (x == NULL) {
goto error;

205
Python/import.c
View File

@ -290,115 +290,10 @@ _PyImport_Fini(void)
PyObject *
PyImport_GetModuleDict(void)
{
PyObject *sysdict = PyThreadState_GET()->interp->sysdict;
if (sysdict == NULL) {
Py_FatalError("PyImport_GetModuleDict: no sys module!");
}
_Py_IDENTIFIER(modules);
PyObject *modules = _PyDict_GetItemId(sysdict, &PyId_modules);
if (modules == NULL) {
Py_FatalError("lost sys.modules");
}
return modules;
}
/* 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 (interp->sysdict == NULL)
return 0;
_Py_IDENTIFIER(modules);
PyObject *modules = _PyDict_GetItemId(interp->sysdict, &PyId_modules);
if (modules == NULL)
return 0;
return 1;
}
PyObject *
_PyImport_GetModule(PyObject *name)
{
PyObject *modules = PyImport_GetModuleDict();
if (PyDict_CheckExact(modules)) {
return PyDict_GetItem(modules, name);
}
PyObject *mod = PyObject_GetItem(modules, name);
// For backward-comaptibility we copy the behavior of PyDict_GetItem().
if (PyErr_Occurred()) {
PyErr_Clear();
}
Py_XDECREF(mod);
return mod;
}
PyObject *
_PyImport_GetModuleWithError(PyObject *name)
{
PyObject *modules = PyImport_GetModuleDict();
if (PyDict_CheckExact(modules)) {
return PyDict_GetItemWithError(modules, name);
}
PyObject *mod = PyObject_GetItem(modules, name);
// For backward-comaptibility we copy the behavior
// of PyDict_GetItemWithError().
if (PyErr_ExceptionMatches(PyExc_KeyError)) {
PyErr_Clear();
}
return mod;
}
PyObject *
_PyImport_GetModuleId(struct _Py_Identifier *nameid)
{
PyObject *name = _PyUnicode_FromId(nameid); /* borrowed */
if (name == NULL) {
return NULL;
}
return _PyImport_GetModule(name);
}
int
_PyImport_SetModule(PyObject *name, PyObject *m)
{
PyObject *modules = PyImport_GetModuleDict();
return PyObject_SetItem(modules, name, m);
}
int
_PyImport_SetModuleString(const char *name, PyObject *m)
{
PyObject *modules = PyImport_GetModuleDict();
return PyMapping_SetItemString(modules, name, m);
}
PyObject *
PyImport_GetModule(PyObject *name)
{
PyObject *m;
PyObject *modules = PyImport_GetModuleDict();
if (modules == NULL) {
PyErr_SetString(PyExc_RuntimeError, "unable to get sys.modules");
return NULL;
}
Py_INCREF(modules);
if (PyDict_CheckExact(modules)) {
m = PyDict_GetItemWithError(modules, name); /* borrowed */
Py_XINCREF(m);
}
else {
m = PyObject_GetItem(modules, name);
if (PyErr_ExceptionMatches(PyExc_KeyError)) {
PyErr_Clear();
}
}
Py_DECREF(modules);
return m;
PyInterpreterState *interp = PyThreadState_GET()->interp;
if (interp->modules == NULL)
Py_FatalError("PyImport_GetModuleDict: no module dictionary!");
return interp->modules;
}
@ -428,7 +323,7 @@ PyImport_Cleanup(void)
Py_ssize_t pos;
PyObject *key, *value, *dict;
PyInterpreterState *interp = PyThreadState_GET()->interp;
PyObject *modules = PyImport_GetModuleDict();
PyObject *modules = interp->modules;
PyObject *weaklist = NULL;
const char * const *p;
@ -490,7 +385,7 @@ PyImport_Cleanup(void)
if (Py_VerboseFlag && PyUnicode_Check(key))
PySys_FormatStderr("# cleanup[2] removing %U\n", key);
STORE_MODULE_WEAKREF(key, value);
PyObject_SetItem(modules, key, Py_None);
PyDict_SetItem(modules, key, Py_None);
}
}
@ -557,6 +452,7 @@ PyImport_Cleanup(void)
/* Clear and delete the modules directory. Actual modules will
still be there only if imported during the execution of some
destructor. */
interp->modules = NULL;
Py_DECREF(modules);
/* Once more */
@ -615,9 +511,9 @@ PyImport_GetMagicTag(void)
int
_PyImport_FixupExtensionObject(PyObject *mod, PyObject *name,
PyObject *filename, PyObject *modules)
PyObject *filename)
{
PyObject *dict, *key;
PyObject *modules, *dict, *key;
struct PyModuleDef *def;
int res;
if (extensions == NULL) {
@ -634,10 +530,11 @@ _PyImport_FixupExtensionObject(PyObject *mod, PyObject *name,
PyErr_BadInternalCall();
return -1;
}
if (PyObject_SetItem(modules, name, mod) < 0)
modules = PyImport_GetModuleDict();
if (PyDict_SetItem(modules, name, mod) < 0)
return -1;
if (_PyState_AddModule(mod, def) < 0) {
PyMapping_DelItem(modules, name);
PyDict_DelItem(modules, name);
return -1;
}
if (def->m_size == -1) {
@ -665,28 +562,20 @@ _PyImport_FixupExtensionObject(PyObject *mod, PyObject *name,
}
int
_PyImport_FixupBuiltin(PyObject *mod, const char *name, PyObject *modules)
_PyImport_FixupBuiltin(PyObject *mod, const char *name)
{
int res;
PyObject *nameobj;
nameobj = PyUnicode_InternFromString(name);
if (nameobj == NULL)
return -1;
res = _PyImport_FixupExtensionObject(mod, nameobj, nameobj, modules);
res = _PyImport_FixupExtensionObject(mod, nameobj, nameobj);
Py_DECREF(nameobj);
return res;
}
PyObject *
_PyImport_FindExtensionObject(PyObject *name, PyObject *filename)
{
PyObject *modules = PyImport_GetModuleDict();
return _PyImport_FindExtensionObjectEx(name, filename, modules);
}
PyObject *
_PyImport_FindExtensionObjectEx(PyObject *name, PyObject *filename,
PyObject *modules)
{
PyObject *mod, *mdict, *key;
PyModuleDef* def;
@ -703,7 +592,7 @@ _PyImport_FindExtensionObjectEx(PyObject *name, PyObject *filename,
/* Module does not support repeated initialization */
if (def->m_base.m_copy == NULL)
return NULL;
mod = _PyImport_AddModuleObject(name, modules);
mod = PyImport_AddModuleObject(name);
if (mod == NULL)
return NULL;
mdict = PyModule_GetDict(mod);
@ -718,14 +607,14 @@ _PyImport_FindExtensionObjectEx(PyObject *name, PyObject *filename,
mod = def->m_base.m_init();
if (mod == NULL)
return NULL;
if (PyObject_SetItem(modules, name, mod) == -1) {
if (PyDict_SetItem(PyImport_GetModuleDict(), name, mod) == -1) {
Py_DECREF(mod);
return NULL;
}
Py_DECREF(mod);
}
if (_PyState_AddModule(mod, def) < 0) {
PyMapping_DelItem(modules, name);
PyDict_DelItem(PyImport_GetModuleDict(), name);
Py_DECREF(mod);
return NULL;
}
@ -737,13 +626,13 @@ _PyImport_FindExtensionObjectEx(PyObject *name, PyObject *filename,
}
PyObject *
_PyImport_FindBuiltin(const char *name, PyObject *modules)
_PyImport_FindBuiltin(const char *name)
{
PyObject *res, *nameobj;
nameobj = PyUnicode_InternFromString(name);
if (nameobj == NULL)
return NULL;
res = _PyImport_FindExtensionObjectEx(nameobj, nameobj, modules);
res = _PyImport_FindExtensionObject(nameobj, nameobj);
Py_DECREF(nameobj);
return res;
}
@ -758,34 +647,19 @@ PyObject *
PyImport_AddModuleObject(PyObject *name)
{
PyObject *modules = PyImport_GetModuleDict();
return _PyImport_AddModuleObject(name, modules);
}
PyObject *
_PyImport_AddModuleObject(PyObject *name, PyObject *modules)
{
PyObject *m;
if (PyDict_CheckExact(modules)) {
m = PyDict_GetItemWithError(modules, name);
}
else {
m = PyObject_GetItem(modules, name);
// For backward-comaptibility we copy the behavior
// of PyDict_GetItemWithError().
if (PyErr_ExceptionMatches(PyExc_KeyError)) {
PyErr_Clear();
}
if ((m = PyDict_GetItemWithError(modules, name)) != NULL &&
PyModule_Check(m)) {
return m;
}
if (PyErr_Occurred()) {
return NULL;
}
if (m != NULL && PyModule_Check(m)) {
return m;
}
m = PyModule_NewObject(name);
if (m == NULL)
return NULL;
if (PyObject_SetItem(modules, name, m) != 0) {
if (PyDict_SetItem(modules, name, m) != 0) {
Py_DECREF(m);
return NULL;
}
@ -812,13 +686,11 @@ static void
remove_module(PyObject *name)
{
PyObject *modules = PyImport_GetModuleDict();
if (PyMapping_DelItem(modules, name) < 0) {
if (!PyMapping_HasKey(modules, name)) {
return;
}
if (PyDict_GetItem(modules, name) == NULL)
return;
if (PyDict_DelItem(modules, name) < 0)
Py_FatalError("import: deleting existing key in"
"sys.modules failed");
}
}
@ -927,6 +799,7 @@ module_dict_for_exec(PyObject *name)
static PyObject *
exec_code_in_module(PyObject *name, PyObject *module_dict, PyObject *code_object)
{
PyObject *modules = PyImport_GetModuleDict();
PyObject *v, *m;
v = PyEval_EvalCode(code_object, module_dict, module_dict);
@ -936,8 +809,7 @@ exec_code_in_module(PyObject *name, PyObject *module_dict, PyObject *code_object
}
Py_DECREF(v);
m = _PyImport_GetModule(name);
if (m == NULL) {
if ((m = PyDict_GetItem(modules, name)) == NULL) {
PyErr_Format(PyExc_ImportError,
"Loaded module %R not found in sys.modules",
name);
@ -1170,7 +1042,6 @@ _imp_create_builtin(PyObject *module, PyObject *spec)
return NULL;
}
PyObject *modules = NULL;
for (p = PyImport_Inittab; p->name != NULL; p++) {
PyModuleDef *def;
if (_PyUnicode_EqualToASCIIString(name, p->name)) {
@ -1196,11 +1067,7 @@ _imp_create_builtin(PyObject *module, PyObject *spec)
return NULL;
}
def->m_base.m_init = p->initfunc;
if (modules == NULL) {
modules = PyImport_GetModuleDict();
}
if (_PyImport_FixupExtensionObject(mod, name, name,
modules) < 0) {
if (_PyImport_FixupExtensionObject(mod, name, name) < 0) {
Py_DECREF(name);
return NULL;
}
@ -1644,7 +1511,7 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
Py_INCREF(abs_name);
}
mod = _PyImport_GetModule(abs_name);
mod = PyDict_GetItem(interp->modules, abs_name);
if (mod != NULL && mod != Py_None) {
_Py_IDENTIFIER(__spec__);
_Py_IDENTIFIER(_initializing);
@ -1731,7 +1598,7 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
goto error;
}
final_mod = _PyImport_GetModule(to_return);
final_mod = PyDict_GetItem(interp->modules, to_return);
Py_DECREF(to_return);
if (final_mod == NULL) {
PyErr_Format(PyExc_KeyError,
@ -1784,10 +1651,10 @@ PyImport_ImportModuleLevel(const char *name, PyObject *globals, PyObject *locals
PyObject *
PyImport_ReloadModule(PyObject *m)
{
_Py_IDENTIFIER(imp);
_Py_IDENTIFIER(reload);
PyObject *reloaded_module = NULL;
PyObject *imp = _PyImport_GetModuleId(&PyId_imp);
PyObject *modules = PyImport_GetModuleDict();
PyObject *imp = PyDict_GetItemString(modules, "imp");
if (imp == NULL) {
imp = PyImport_ImportModule("imp");
if (imp == NULL) {
@ -1822,6 +1689,7 @@ PyImport_Import(PyObject *module_name)
PyObject *globals = NULL;
PyObject *import = NULL;
PyObject *builtins = NULL;
PyObject *modules = NULL;
PyObject *r = NULL;
/* Initialize constant string objects */
@ -1876,7 +1744,8 @@ PyImport_Import(PyObject *module_name)
goto err;
Py_DECREF(r);
r = _PyImport_GetModule(module_name);
modules = PyImport_GetModuleDict();
r = PyDict_GetItemWithError(modules, module_name);
if (r != NULL) {
Py_INCREF(r);
}

3
Python/importdl.c
View File

@ -215,8 +215,7 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
else
Py_INCREF(path);
PyObject *modules = PyImport_GetModuleDict();
if (_PyImport_FixupExtensionObject(m, name_unicode, path, modules) < 0)
if (_PyImport_FixupExtensionObject(m, name_unicode, path) < 0)
goto error;
Py_DECREF(name_unicode);

76
Python/pylifecycle.c
View File

@ -42,7 +42,6 @@ _Py_IDENTIFIER(name);
_Py_IDENTIFIER(stdin);
_Py_IDENTIFIER(stdout);
_Py_IDENTIFIER(stderr);
_Py_IDENTIFIER(threading);
#ifdef __cplusplus
extern "C" {
@ -284,6 +283,7 @@ initimport(PyInterpreterState *interp, PyObject *sysmod)
{
PyObject *importlib;
PyObject *impmod;
PyObject *sys_modules;
PyObject *value;
/* Import _importlib through its frozen version, _frozen_importlib. */
@ -314,7 +314,11 @@ initimport(PyInterpreterState *interp, PyObject *sysmod)
else if (Py_VerboseFlag) {
PySys_FormatStderr("import _imp # builtin\n");
}
if (_PyImport_SetModuleString("_imp", impmod) < 0) {
sys_modules = PyImport_GetModuleDict();
if (Py_VerboseFlag) {
PySys_FormatStderr("import sys # builtin\n");
}
if (PyDict_SetItemString(sys_modules, "_imp", impmod) < 0) {
Py_FatalError("Py_Initialize: can't save _imp to sys.modules");
}
@ -671,20 +675,10 @@ void _Py_InitializeCore(const _PyCoreConfig *config)
if (!_PyFloat_Init())
Py_FatalError("Py_InitializeCore: can't init float");
PyObject *modules = PyDict_New();
if (modules == NULL)
interp->modules = PyDict_New();
if (interp->modules == NULL)
Py_FatalError("Py_InitializeCore: can't make modules dictionary");
sysmod = _PySys_BeginInit();
if (sysmod == NULL)
Py_FatalError("Py_InitializeCore: can't initialize sys");
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL)
Py_FatalError("Py_InitializeCore: can't initialize sys dict");
Py_INCREF(interp->sysdict);
PyDict_SetItemString(interp->sysdict, "modules", modules);
_PyImport_FixupBuiltin(sysmod, "sys", modules);
/* Init Unicode implementation; relies on the codec registry */
if (_PyUnicode_Init() < 0)
Py_FatalError("Py_InitializeCore: can't initialize unicode");
@ -695,7 +689,7 @@ void _Py_InitializeCore(const _PyCoreConfig *config)
bimod = _PyBuiltin_Init();
if (bimod == NULL)
Py_FatalError("Py_InitializeCore: can't initialize builtins modules");
_PyImport_FixupBuiltin(bimod, "builtins", modules);
_PyImport_FixupBuiltin(bimod, "builtins");
interp->builtins = PyModule_GetDict(bimod);
if (interp->builtins == NULL)
Py_FatalError("Py_InitializeCore: can't initialize builtins dict");
@ -704,6 +698,17 @@ void _Py_InitializeCore(const _PyCoreConfig *config)
/* initialize builtin exceptions */
_PyExc_Init(bimod);
sysmod = _PySys_BeginInit();
if (sysmod == NULL)
Py_FatalError("Py_InitializeCore: can't initialize sys");
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL)
Py_FatalError("Py_InitializeCore: can't initialize sys dict");
Py_INCREF(interp->sysdict);
_PyImport_FixupBuiltin(sysmod, "sys");
PyDict_SetItemString(interp->sysdict, "modules",
interp->modules);
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place. */
pstderr = PyFile_NewStdPrinter(fileno(stderr));
@ -1006,11 +1011,6 @@ Py_FinalizeEx(void)
while (_PyGC_CollectIfEnabled() > 0)
/* nothing */;
#endif
#ifdef Py_REF_DEBUG
PyObject *showrefcount = _PyDebug_XOptionShowRefCount();
#endif
/* Destroy all modules */
PyImport_Cleanup();
@ -1058,10 +1058,7 @@ Py_FinalizeEx(void)
/* dump hash stats */
_PyHash_Fini();
#ifdef Py_REF_DEBUG
if (showrefcount == Py_True)
_PyDebug_PrintTotalRefs();
#endif
_PY_DEBUG_PRINT_TOTAL_REFS();
#ifdef Py_TRACE_REFS
/* Display all objects still alive -- this can invoke arbitrary
@ -1206,22 +1203,9 @@ Py_NewInterpreter(void)
/* XXX The following is lax in error checking */
PyObject *modules = PyDict_New();
if (modules == NULL)
Py_FatalError("Py_NewInterpreter: can't make modules dictionary");
interp->modules = PyDict_New();
sysmod = _PyImport_FindBuiltin("sys", modules);
if (sysmod != NULL) {
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL)
goto handle_error;
Py_INCREF(interp->sysdict);
PyDict_SetItemString(interp->sysdict, "modules", modules);
PySys_SetPath(Py_GetPath());
_PySys_EndInit(interp->sysdict);
}
bimod = _PyImport_FindBuiltin("builtins", modules);
bimod = _PyImport_FindBuiltin("builtins");
if (bimod != NULL) {
interp->builtins = PyModule_GetDict(bimod);
if (interp->builtins == NULL)
@ -1232,9 +1216,18 @@ Py_NewInterpreter(void)
/* initialize builtin exceptions */
_PyExc_Init(bimod);
sysmod = _PyImport_FindBuiltin("sys");
if (bimod != NULL && sysmod != NULL) {
PyObject *pstderr;
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL)
goto handle_error;
Py_INCREF(interp->sysdict);
_PySys_EndInit(interp->sysdict);
PySys_SetPath(Py_GetPath());
PyDict_SetItemString(interp->sysdict, "modules",
interp->modules);
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place. */
pstderr = PyFile_NewStdPrinter(fileno(stderr));
@ -1910,13 +1903,14 @@ wait_for_thread_shutdown(void)
{
_Py_IDENTIFIER(_shutdown);
PyObject *result;
PyObject *threading = _PyImport_GetModuleId(&PyId_threading);
PyThreadState *tstate = PyThreadState_GET();
PyObject *threading = PyMapping_GetItemString(tstate->interp->modules,
"threading");
if (threading == NULL) {
/* threading not imported */
PyErr_Clear();
return;
}
Py_INCREF(threading);
result = _PyObject_CallMethodId(threading, &PyId__shutdown, NULL);
if (result == NULL) {
PyErr_WriteUnraisable(threading);

4
Python/pystate.c
View File

@ -90,12 +90,15 @@ PyInterpreterState_New(void)
PyMem_RawMalloc(sizeof(PyInterpreterState));
if (interp != NULL) {
interp->modules = NULL;
interp->modules_by_index = NULL;
interp->sysdict = NULL;
interp->builtins = NULL;
interp->builtins_copy = NULL;
interp->tstate_head = NULL;
interp->check_interval = 100;
interp->warnoptions = NULL;
interp->xoptions = NULL;
interp->num_threads = 0;
interp->pythread_stacksize = 0;
interp->codec_search_path = NULL;
@ -153,6 +156,7 @@ PyInterpreterState_Clear(PyInterpreterState *interp)
Py_CLEAR(interp->codec_search_path);
Py_CLEAR(interp->codec_search_cache);
Py_CLEAR(interp->codec_error_registry);
Py_CLEAR(interp->modules);
Py_CLEAR(interp->modules_by_index);
Py_CLEAR(interp->sysdict);
Py_CLEAR(interp->builtins);

5
Python/pythonrun.c
View File

@ -113,10 +113,7 @@ PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags *
err = -1;
for (;;) {
ret = PyRun_InteractiveOneObject(fp, filename, flags);
#ifdef Py_REF_DEBUG
if (_PyDebug_XOptionShowRefCount() == Py_True)
_PyDebug_PrintTotalRefs();
#endif
_PY_DEBUG_PRINT_TOTAL_REFS();
if (ret == E_EOF) {
err = 0;
break;

47
Python/sysmodule.c
View File

@ -36,14 +36,12 @@ extern const char *PyWin_DLLVersionString;
_Py_IDENTIFIER(_);
_Py_IDENTIFIER(__sizeof__);
_Py_IDENTIFIER(_xoptions);
_Py_IDENTIFIER(buffer);
_Py_IDENTIFIER(builtins);
_Py_IDENTIFIER(encoding);
_Py_IDENTIFIER(path);
_Py_IDENTIFIER(stdout);
_Py_IDENTIFIER(stderr);
_Py_IDENTIFIER(warnoptions);
_Py_IDENTIFIER(write);
PyObject *
@ -162,11 +160,13 @@ static PyObject *
sys_displayhook(PyObject *self, PyObject *o)
{
PyObject *outf;
PyInterpreterState *interp = PyThreadState_GET()->interp;
PyObject *modules = interp->modules;
PyObject *builtins;
static PyObject *newline = NULL;
int err;
builtins = _PyImport_GetModuleId(&PyId_builtins);
builtins = _PyDict_GetItemId(modules, &PyId_builtins);
if (builtins == NULL) {
PyErr_SetString(PyExc_RuntimeError, "lost builtins module");
return NULL;
@ -1481,17 +1481,13 @@ list_builtin_module_names(void)
static PyObject *
get_warnoptions(void)
{
PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
if (warnoptions == NULL || !PyList_Check(warnoptions)) {
Py_XDECREF(warnoptions);
warnoptions = PyList_New(0);
if (warnoptions == NULL)
return NULL;
if (_PySys_SetObjectId(&PyId_warnoptions, warnoptions)) {
Py_DECREF(warnoptions);
return NULL;
}
Py_DECREF(warnoptions);
PyThreadState_GET()->interp->warnoptions = warnoptions;
}
return warnoptions;
}
@ -1499,7 +1495,7 @@ get_warnoptions(void)
void
PySys_ResetWarnOptions(void)
{
PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
if (warnoptions == NULL || !PyList_Check(warnoptions))
return;
PyList_SetSlice(warnoptions, 0, PyList_GET_SIZE(warnoptions), NULL);
@ -1528,24 +1524,20 @@ PySys_AddWarnOption(const wchar_t *s)
int
PySys_HasWarnOptions(void)
{
PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
return (warnoptions != NULL && (PyList_Size(warnoptions) > 0)) ? 1 : 0;
}
static PyObject *
get_xoptions(void)
{
PyObject *xoptions = _PySys_GetObjectId(&PyId__xoptions);
PyObject *xoptions = PyThreadState_GET()->interp->xoptions;
if (xoptions == NULL || !PyDict_Check(xoptions)) {
Py_XDECREF(xoptions);
xoptions = PyDict_New();
if (xoptions == NULL)
return NULL;
if (_PySys_SetObjectId(&PyId__xoptions, xoptions)) {
Py_DECREF(xoptions);
return NULL;
}
Py_DECREF(xoptions);
PyThreadState_GET()->interp->xoptions = xoptions;
}
return xoptions;
}
@ -1947,7 +1939,7 @@ _PySys_BeginInit(void)
PyObject *m, *sysdict, *version_info;
int res;
m = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION);
m = PyModule_Create(&sysmodule);
if (m == NULL)
return NULL;
sysdict = PyModule_GetDict(m);
@ -2094,6 +2086,16 @@ _PySys_BeginInit(void)
#undef SET_SYS_FROM_STRING_BORROW
/* Updating the sys namespace, returning integer error codes */
#define SET_SYS_FROM_STRING_BORROW_INT_RESULT(key, value) \
do { \
PyObject *v = (value); \
if (v == NULL) \
return -1; \
res = PyDict_SetItemString(sysdict, key, v); \
if (res < 0) { \
return res; \
} \
} while (0)
#define SET_SYS_FROM_STRING_INT_RESULT(key, value) \
do { \
PyObject *v = (value); \
@ -2138,11 +2140,15 @@ _PySys_EndInit(PyObject *sysdict)
SET_SYS_FROM_STRING_INT_RESULT("base_exec_prefix",
PyUnicode_FromWideChar(Py_GetExecPrefix(), -1));
if (get_warnoptions() == NULL)
PyObject *warnoptions = get_warnoptions();
if (warnoptions == NULL)
return -1;
SET_SYS_FROM_STRING_BORROW_INT_RESULT("warnoptions", warnoptions);
if (get_xoptions() == NULL)
PyObject *xoptions = get_xoptions();
if (xoptions == NULL)
return -1;
SET_SYS_FROM_STRING_BORROW_INT_RESULT("_xoptions", xoptions);
if (PyErr_Occurred())
return -1;
@ -2150,6 +2156,7 @@ _PySys_EndInit(PyObject *sysdict)
}
#undef SET_SYS_FROM_STRING_INT_RESULT
#undef SET_SYS_FROM_STRING_BORROW_INT_RESULT
static PyObject *
makepathobject(const wchar_t *path, wchar_t delim)