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gh-101758: Clean Up Uses of Import State (gh-101919) 

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
This commit is contained in:
Eric Snow 2023-02-15 15:32:31 -07:00 committed by GitHub
parent c1ce0d178f
commit b2fc549278
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
20 changed files with 1496 additions and 1092 deletions
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103
Include/internal/pycore_import.h
View File

@ -36,11 +36,112 @@ struct _import_runtime_state {
const char * pkgcontext;
};
struct _import_state {
/* cached sys.modules dictionary */
PyObject *modules;
/* This is the list of module objects for all legacy (single-phase init)
extension modules ever loaded in this process (i.e. imported
in this interpreter or in any other). Py_None stands in for
modules that haven't actually been imported in this interpreter.
A module's index (PyModuleDef.m_base.m_index) is used to look up
the corresponding module object for this interpreter, if any.
(See PyState_FindModule().) When any extension module
is initialized during import, its moduledef gets initialized by
PyModuleDef_Init(), and the first time that happens for each
PyModuleDef, its index gets set to the current value of
a global counter (see _PyRuntimeState.imports.last_module_index).
The entry for that index in this interpreter remains unset until
the module is actually imported here. (Py_None is used as
a placeholder.) Note that multi-phase init modules always get
an index for which there will never be a module set.
This is initialized lazily in PyState_AddModule(), which is also
where modules get added. */
PyObject *modules_by_index;
/* importlib module._bootstrap */
PyObject *importlib;
/* override for config->use_frozen_modules (for tests)
(-1: "off", 1: "on", 0: no override) */
int override_frozen_modules;
#ifdef HAVE_DLOPEN
int dlopenflags;
#endif
PyObject *import_func;
};
#ifdef HAVE_DLOPEN
# include <dlfcn.h>
# if HAVE_DECL_RTLD_NOW
# define _Py_DLOPEN_FLAGS RTLD_NOW
# else
# define _Py_DLOPEN_FLAGS RTLD_LAZY
# endif
# define DLOPENFLAGS_INIT .dlopenflags = _Py_DLOPEN_FLAGS,
#else
# define _Py_DLOPEN_FLAGS 0
# define DLOPENFLAGS_INIT
#endif
#define IMPORTS_INIT \
{ \
.override_frozen_modules = 0, \
DLOPENFLAGS_INIT \
}
extern void _PyImport_ClearCore(PyInterpreterState *interp);
extern Py_ssize_t _PyImport_GetNextModuleIndex(void);
extern const char * _PyImport_ResolveNameWithPackageContext(const char *name);
extern const char * _PyImport_SwapPackageContext(const char *newcontext);
extern int _PyImport_GetDLOpenFlags(PyInterpreterState *interp);
extern void _PyImport_SetDLOpenFlags(PyInterpreterState *interp, int new_val);
extern PyObject * _PyImport_InitModules(PyInterpreterState *interp);
extern PyObject * _PyImport_GetModules(PyInterpreterState *interp);
extern void _PyImport_ClearModules(PyInterpreterState *interp);
extern void _PyImport_ClearModulesByIndex(PyInterpreterState *interp);
extern int _PyImport_InitDefaultImportFunc(PyInterpreterState *interp);
extern int _PyImport_IsDefaultImportFunc(
PyInterpreterState *interp,
PyObject *func);
extern PyObject * _PyImport_GetImportlibLoader(
PyInterpreterState *interp,
const char *loader_name);
extern PyObject * _PyImport_GetImportlibExternalLoader(
PyInterpreterState *interp,
const char *loader_name);
extern PyObject * _PyImport_BlessMyLoader(
PyInterpreterState *interp,
PyObject *module_globals);
extern PyObject * _PyImport_ImportlibModuleRepr(
PyInterpreterState *interp,
PyObject *module);
extern PyStatus _PyImport_Init(void);
extern void _PyImport_Fini(void);
extern void _PyImport_Fini2(void);
extern PyStatus _PyImport_InitCore(
PyThreadState *tstate,
PyObject *sysmod,
int importlib);
extern PyStatus _PyImport_InitExternal(PyThreadState *tstate);
extern void _PyImport_FiniCore(PyInterpreterState *interp);
extern void _PyImport_FiniExternal(PyInterpreterState *interp);
#ifdef HAVE_FORK
extern PyStatus _PyImport_ReInitLock(void);
#endif
extern PyObject* _PyImport_BootstrapImp(PyThreadState *tstate);
extern PyObject* _PyImport_GetBuiltinModuleNames(void);
struct _module_alias {
const char *name; /* ASCII encoded string */

33
Include/internal/pycore_interp.h
View File

@ -21,6 +21,7 @@ extern "C" {
#include "pycore_function.h" // FUNC_MAX_WATCHERS
#include "pycore_genobject.h" // struct _Py_async_gen_state
#include "pycore_gc.h" // struct _gc_runtime_state
#include "pycore_import.h" // struct _import_state
#include "pycore_list.h" // struct _Py_list_state
#include "pycore_global_objects.h" // struct _Py_interp_static_objects
#include "pycore_tuple.h" // struct _Py_tuple_state
@ -92,37 +93,12 @@ struct _is {
struct _ceval_state ceval;
struct _gc_runtime_state gc;
// sys.modules dictionary
PyObject *modules;
/* This is the list of module objects for all legacy (single-phase init)
extension modules ever loaded in this process (i.e. imported
in this interpreter or in any other). Py_None stands in for
modules that haven't actually been imported in this interpreter.
struct _import_state imports;
A module's index (PyModuleDef.m_base.m_index) is used to look up
the corresponding module object for this interpreter, if any.
(See PyState_FindModule().) When any extension module
is initialized during import, its moduledef gets initialized by
PyModuleDef_Init(), and the first time that happens for each
PyModuleDef, its index gets set to the current value of
a global counter (see _PyRuntimeState.imports.last_module_index).
The entry for that index in this interpreter remains unset until
the module is actually imported here. (Py_None is used as
a placeholder.) Note that multi-phase init modules always get
an index for which there will never be a module set.
This is initialized lazily in _PyState_AddModule(), which is also
where modules get added. */
PyObject *modules_by_index;
// Dictionary of the sys module
PyObject *sysdict;
// Dictionary of the builtins module
PyObject *builtins;
// importlib module
PyObject *importlib;
// override for config->use_frozen_modules (for tests)
// (-1: "off", 1: "on", 0: no override)
int override_frozen_modules;
PyObject *codec_search_path;
PyObject *codec_search_cache;
@ -130,15 +106,11 @@ struct _is {
int codecs_initialized;
PyConfig config;
#ifdef HAVE_DLOPEN
int dlopenflags;
#endif
unsigned long feature_flags;
PyObject *dict; /* Stores per-interpreter state */
PyObject *builtins_copy;
PyObject *import_func;
// Initialized to _PyEval_EvalFrameDefault().
_PyFrameEvalFunction eval_frame;
@ -205,7 +177,6 @@ struct _is {
/* other API */
extern void _PyInterpreterState_ClearModules(PyInterpreterState *interp);
extern void _PyInterpreterState_Clear(PyThreadState *tstate);

4
Include/internal/pycore_pylifecycle.h
View File

@ -30,7 +30,6 @@ PyAPI_FUNC(int) _Py_IsLocaleCoercionTarget(const char *ctype_loc);
/* Various one-time initializers */
extern void _Py_InitVersion(void);
extern PyStatus _PyImport_Init(void);
extern PyStatus _PyFaulthandler_Init(int enable);
extern int _PyTraceMalloc_Init(int enable);
extern PyObject * _PyBuiltin_Init(PyInterpreterState *interp);
@ -45,7 +44,6 @@ extern int _PyBuiltins_AddExceptions(PyObject * bltinmod);
extern PyStatus _Py_HashRandomization_Init(const PyConfig *);
extern PyStatus _PyTime_Init(void);
extern PyStatus _PyImportZip_Init(PyThreadState *tstate);
extern PyStatus _PyGC_Init(PyInterpreterState *interp);
extern PyStatus _PyAtExit_Init(PyInterpreterState *interp);
extern int _Py_Deepfreeze_Init(void);
@ -55,8 +53,6 @@ extern int _Py_Deepfreeze_Init(void);
extern int _PySignal_Init(int install_signal_handlers);
extern void _PySignal_Fini(void);
extern void _PyImport_Fini(void);
extern void _PyImport_Fini2(void);
extern void _PyGC_Fini(PyInterpreterState *interp);
extern void _Py_HashRandomization_Fini(void);
extern void _PyFaulthandler_Fini(void);

6
Include/internal/pycore_pystate.h
View File

@ -152,12 +152,6 @@ extern void _PySignal_AfterFork(void);
#endif
PyAPI_FUNC(int) _PyState_AddModule(
PyThreadState *tstate,
PyObject* module,
PyModuleDef* def);
PyAPI_FUNC(int) _PyOS_InterruptOccurred(PyThreadState *tstate);
#define HEAD_LOCK(runtime) \

15
Include/internal/pycore_runtime_init.h
View File

@ -97,23 +97,10 @@ extern "C" {
._main_interpreter = _PyInterpreterState_INIT, \
}
#ifdef HAVE_DLOPEN
# include <dlfcn.h>
# if HAVE_DECL_RTLD_NOW
# define _Py_DLOPEN_FLAGS RTLD_NOW
# else
# define _Py_DLOPEN_FLAGS RTLD_LAZY
# endif
# define DLOPENFLAGS_INIT .dlopenflags = _Py_DLOPEN_FLAGS,
#else
# define _Py_DLOPEN_FLAGS 0
# define DLOPENFLAGS_INIT
#endif
#define _PyInterpreterState_INIT \
{ \
.id_refcount = -1, \
DLOPENFLAGS_INIT \
.imports = IMPORTS_INIT, \
.ceval = { \
.recursion_limit = Py_DEFAULT_RECURSION_LIMIT, \
}, \

3
Include/internal/pycore_sysmodule.h
View File

@ -20,6 +20,9 @@ extern void _PySys_ClearAuditHooks(PyThreadState *tstate);
PyAPI_FUNC(int) _PySys_SetAttr(PyObject *, PyObject *);
extern int _PySys_ClearAttrString(PyInterpreterState *interp,
const char *name, int verbose);
#ifdef __cplusplus
}
#endif

2
Lib/test/test_imp.py
View File

@ -387,7 +387,7 @@ class ImportTests(unittest.TestCase):
check_basic_reloaded(mod, lookedup, initialized, init_count,
before, reloaded)
# Currently _PyState_AddModule() always replaces the cached module.
# Currently PyState_AddModule() always replaces the cached module.
self.assertIs(basic.look_up_self(), mod)
self.assertEqual(basic.initialized_count(), expected_init_count)

1
Lib/test/test_stable_abi_ctypes.py generated
View File

@ -864,7 +864,6 @@ SYMBOL_NAMES = (
"_PyObject_GC_Resize",
"_PyObject_New",
"_PyObject_NewVar",
"_PyState_AddModule",
"_PyThreadState_Init",
"_PyThreadState_Prealloc",
"_PyWeakref_CallableProxyType",

3
Misc/stable_abi.toml
View File

@ -1684,9 +1684,6 @@
[function._PyObject_NewVar]
added = '3.2'
abi_only = true
[function._PyState_AddModule]
added = '3.2'
abi_only = true
[function._PyThreadState_Init]
added = '3.2'
abi_only = true

25
Objects/moduleobject.c
View File

@ -42,10 +42,9 @@ PyModuleDef_Init(PyModuleDef* def)
{
assert(PyModuleDef_Type.tp_flags & Py_TPFLAGS_READY);
if (def->m_base.m_index == 0) {
_PyRuntime.imports.last_module_index++;
Py_SET_REFCNT(def, 1);
Py_SET_TYPE(def, &PyModuleDef_Type);
def->m_base.m_index = _PyRuntime.imports.last_module_index;
def->m_base.m_index = _PyImport_GetNextModuleIndex();
}
return (PyObject*)def;
}
@ -209,24 +208,7 @@ _PyModule_CreateInitialized(PyModuleDef* module, int module_api_version)
"module %s: PyModule_Create is incompatible with m_slots", name);
return NULL;
}
/* 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
_Py_PackageContext, and PyModule_Create*() will substitute this
(if the name actually matches).
*/
#define _Py_PackageContext (_PyRuntime.imports.pkgcontext)
if (_Py_PackageContext != NULL) {
const char *p = strrchr(_Py_PackageContext, '.');
if (p != NULL && strcmp(module->m_name, p+1) == 0) {
name = _Py_PackageContext;
_Py_PackageContext = NULL;
}
}
#undef _Py_PackageContext
name = _PyImport_ResolveNameWithPackageContext(name);
if ((m = (PyModuleObject*)PyModule_New(name)) == NULL)
return NULL;
@ -710,8 +692,7 @@ static PyObject *
module_repr(PyModuleObject *m)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
return PyObject_CallMethod(interp->importlib, "_module_repr", "O", m);
return _PyImport_ImportlibModuleRepr(interp, (PyObject *)m);
}
/* Check if the "_initializing" attribute of the module spec is set to true.

1
PC/python3dll.c generated
View File

@ -34,7 +34,6 @@ EXPORT_FUNC(_PyObject_GC_NewVar)
EXPORT_FUNC(_PyObject_GC_Resize)
EXPORT_FUNC(_PyObject_New)
EXPORT_FUNC(_PyObject_NewVar)
EXPORT_FUNC(_PyState_AddModule)
EXPORT_FUNC(_PyThreadState_Init)
EXPORT_FUNC(_PyThreadState_Prealloc)
EXPORT_FUNC(Py_AddPendingCall)

11
Python/_warnings.c
View File

@ -214,7 +214,7 @@ get_warnings_attr(PyInterpreterState *interp, PyObject *attr, int try_import)
gone, then we can't even use PyImport_GetModule without triggering
an interpreter abort.
*/
if (!interp->modules) {
if (!_PyImport_GetModules(interp)) {
return NULL;
}
warnings_module = PyImport_GetModule(&_Py_ID(warnings));
@ -1050,7 +1050,6 @@ warnings_warn_impl(PyObject *module, PyObject *message, PyObject *category,
static PyObject *
get_source_line(PyInterpreterState *interp, PyObject *module_globals, int lineno)
{
PyObject *external;
PyObject *loader;
PyObject *module_name;
PyObject *get_source;
@ -1059,13 +1058,7 @@ get_source_line(PyInterpreterState *interp, PyObject *module_globals, int lineno
PyObject *source_line;
/* stolen from import.c */
external = PyObject_GetAttrString(interp->importlib, "_bootstrap_external");
if (external == NULL) {
return NULL;
}
loader = PyObject_CallMethod(external, "_bless_my_loader", "O", module_globals, NULL);
Py_DECREF(external);
loader = _PyImport_BlessMyLoader(interp, module_globals);
if (loader == NULL) {
return NULL;
}

2
Python/ceval.c
View File

@ -2688,7 +2688,7 @@ import_name(PyThreadState *tstate, _PyInterpreterFrame *frame,
}
PyObject *locals = frame->f_locals;
/* Fast path for not overloaded __import__. */
if (import_func == tstate->interp->import_func) {
if (_PyImport_IsDefaultImportFunc(tstate->interp, import_func)) {
int ilevel = _PyLong_AsInt(level);
if (ilevel == -1 && _PyErr_Occurred(tstate)) {
return NULL;

2
Python/dynload_shlib.c
View File

@ -75,7 +75,7 @@ _PyImport_FindSharedFuncptr(const char *prefix,
return NULL;
}
dlopenflags = _PyInterpreterState_GET()->dlopenflags;
dlopenflags = _PyImport_GetDLOpenFlags(_PyInterpreterState_GET());
handle = dlopen(pathname, dlopenflags);

2014
Python/import.c
View File

File diff suppressed because it is too large Load Diff

17
Python/importdl.c
View File

@ -99,7 +99,7 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
#endif
PyObject *name_unicode = NULL, *name = NULL, *path = NULL, *m = NULL;
const char *name_buf, *hook_prefix;
const char *oldcontext;
const char *oldcontext, *newcontext;
dl_funcptr exportfunc;
PyModuleDef *def;
PyModInitFunction p0;
@ -113,6 +113,10 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
"spec.name must be a string");
goto error;
}
newcontext = PyUnicode_AsUTF8(name_unicode);
if (newcontext == NULL) {
goto error;
}
name = get_encoded_name(name_unicode, &hook_prefix);
if (name == NULL) {
@ -160,16 +164,9 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
p0 = (PyModInitFunction)exportfunc;
/* Package context is needed for single-phase init */
#define _Py_PackageContext (_PyRuntime.imports.pkgcontext)
oldcontext = _Py_PackageContext;
_Py_PackageContext = PyUnicode_AsUTF8(name_unicode);
if (_Py_PackageContext == NULL) {
_Py_PackageContext = oldcontext;
goto error;
}
oldcontext = _PyImport_SwapPackageContext(newcontext);
m = _PyImport_InitFunc_TrampolineCall(p0);
_Py_PackageContext = oldcontext;
#undef _Py_PackageContext
_PyImport_SwapPackageContext(oldcontext);
if (m == NULL) {
if (!PyErr_Occurred()) {

125
Python/pylifecycle.c
View File

@ -156,79 +156,6 @@ Py_IsInitialized(void)
}
/* 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;
}
interp->importlib = Py_NewRef(importlib);
// Import the _imp module
if (verbose) {
PySys_FormatStderr("import _imp # builtin\n");
}
PyObject *imp_mod = _PyImport_BootstrapImp(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 PyStatus
init_importlib_external(PyThreadState *tstate)
{
PyObject *value;
value = PyObject_CallMethod(tstate->interp->importlib,
"_install_external_importers", "");
if (value == NULL) {
_PyErr_Print(tstate);
return _PyStatus_ERR("external importer setup failed");
}
Py_DECREF(value);
return _PyImportZip_Init(tstate);
}
/* Helper functions to better handle the legacy C locale
*
* The legacy C locale assumes ASCII as the default text encoding, which
@ -814,7 +741,8 @@ pycore_init_builtins(PyThreadState *tstate)
goto error;
}
if (_PyImport_FixupBuiltin(bimod, "builtins", interp->modules) < 0) {
PyObject *modules = _PyImport_GetModules(interp);
if (_PyImport_FixupBuiltin(bimod, "builtins", modules) < 0) {
goto error;
}
@ -850,13 +778,9 @@ pycore_init_builtins(PyThreadState *tstate)
}
Py_DECREF(bimod);
// Get the __import__ function
PyObject *import_func = _PyDict_GetItemStringWithError(interp->builtins,
"__import__");
if (import_func == NULL) {
if (_PyImport_InitDefaultImportFunc(interp) < 0) {
goto error;
}
interp->import_func = Py_NewRef(import_func);
assert(!_PyErr_Occurred(tstate));
return _PyStatus_OK();
@ -918,11 +842,10 @@ pycore_interp_init(PyThreadState *tstate)
}
const PyConfig *config = _PyInterpreterState_GetConfig(interp);
if (config->_install_importlib) {
/* This call sets up builtin and frozen import support */
if (init_importlib(tstate, sysmod) < 0) {
return _PyStatus_ERR("failed to initialize importlib");
}
status = _PyImport_InitCore(tstate, sysmod, config->_install_importlib);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
done:
@ -1172,7 +1095,7 @@ init_interp_main(PyThreadState *tstate)
return _PyStatus_ERR("failed to update the Python config");
}
status = init_importlib_external(tstate);
status = _PyImport_InitExternal(tstate);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
@ -1379,8 +1302,11 @@ finalize_modules_delete_special(PyThreadState *tstate, int verbose)
static const char * const sys_deletes[] = {
"path", "argv", "ps1", "ps2",
"last_type", "last_value", "last_traceback",
"path_hooks", "path_importer_cache", "meta_path",
"__interactivehook__",
// path_hooks and path_importer_cache are cleared
// by _PyImport_FiniExternal().
// XXX Clear meta_path in _PyImport_FiniCore().
"meta_path",
NULL
};
@ -1401,10 +1327,7 @@ finalize_modules_delete_special(PyThreadState *tstate, int verbose)
const char * const *p;
for (p = sys_deletes; *p != NULL; p++) {
if (verbose) {
PySys_WriteStderr("# clear sys.%s\n", *p);
}
if (PyDict_SetItemString(interp->sysdict, *p, Py_None) < 0) {
if (_PySys_ClearAttrString(interp, *p, verbose) < 0) {
PyErr_WriteUnraisable(NULL);
}
}
@ -1576,11 +1499,12 @@ finalize_clear_sys_builtins_dict(PyInterpreterState *interp, int verbose)
/* Clear modules, as good as we can */
// XXX Move most of this to import.c.
static void
finalize_modules(PyThreadState *tstate)
{
PyInterpreterState *interp = tstate->interp;
PyObject *modules = interp->modules;
PyObject *modules = _PyImport_GetModules(interp);
if (modules == NULL) {
// Already done
return;
@ -1645,12 +1569,12 @@ finalize_modules(PyThreadState *tstate)
// clear PyInterpreterState.modules_by_index and
// clear PyModuleDef.m_base.m_copy (of extensions not using the multi-phase
// initialization API)
_PyInterpreterState_ClearModules(interp);
_PyImport_ClearModulesByIndex(interp);
// Clear and delete the modules directory. Actual modules will
// still be there only if imported during the execution of some
// destructor.
Py_SETREF(interp->modules, NULL);
_PyImport_ClearModules(interp);
// Collect garbage once more
_PyGC_CollectNoFail(tstate);
@ -1861,6 +1785,8 @@ Py_FinalizeEx(void)
runtime->initialized = 0;
runtime->core_initialized = 0;
// XXX Call something like _PyImport_Disable() here?
/* Destroy the state of all threads of the interpreter, except of the
current thread. In practice, only daemon threads should still be alive,
except if wait_for_thread_shutdown() has been cancelled by CTRL+C.
@ -1910,6 +1836,7 @@ Py_FinalizeEx(void)
PyGC_Collect();
/* Destroy all modules */
_PyImport_FiniExternal(tstate->interp);
finalize_modules(tstate);
/* Print debug stats if any */
@ -1943,7 +1870,9 @@ Py_FinalizeEx(void)
so it is possible to use tracemalloc in objects destructor. */
_PyTraceMalloc_Fini();
/* Destroy the database used by _PyImport_{Fixup,Find}Extension */
/* Finalize any remaining import state */
// XXX Move these up to where finalize_modules() is currently.
_PyImport_FiniCore(tstate->interp);
_PyImport_Fini();
/* unload faulthandler module */
@ -2183,7 +2112,11 @@ Py_EndInterpreter(PyThreadState *tstate)
Py_FatalError("not the last thread");
}
// XXX Call something like _PyImport_Disable() here?
_PyImport_FiniExternal(tstate->interp);
finalize_modules(tstate);
_PyImport_FiniCore(tstate->interp);
finalize_interp_clear(tstate);
finalize_interp_delete(tstate->interp);
@ -2232,7 +2165,7 @@ add_main_module(PyInterpreterState *interp)
if (PyErr_Occurred()) {
return _PyStatus_ERR("Failed to test __main__.__loader__");
}
PyObject *loader = PyObject_GetAttrString(interp->importlib,
PyObject *loader = _PyImport_GetImportlibLoader(interp,
"BuiltinImporter");
if (loader == NULL) {
return _PyStatus_ERR("Failed to retrieve BuiltinImporter");
@ -2739,7 +2672,7 @@ _Py_DumpExtensionModules(int fd, PyInterpreterState *interp)
if (interp == NULL) {
return;
}
PyObject *modules = interp->modules;
PyObject *modules = _PyImport_GetModules(interp);
if (modules == NULL || !PyDict_Check(modules)) {
return;
}

151
Python/pystate.c
View File

@ -772,11 +772,13 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate)
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);
assert(interp->imports.modules == NULL);
assert(interp->imports.modules_by_index == NULL);
assert(interp->imports.importlib == NULL);
assert(interp->imports.import_func == NULL);
Py_CLEAR(interp->builtins_copy);
Py_CLEAR(interp->importlib);
Py_CLEAR(interp->import_func);
Py_CLEAR(interp->dict);
#ifdef HAVE_FORK
Py_CLEAR(interp->before_forkers);
@ -836,6 +838,7 @@ PyInterpreterState_Clear(PyInterpreterState *interp)
// garbage. It can be different than the current Python thread state
// of 'interp'.
PyThreadState *current_tstate = current_fast_get(interp->runtime);
_PyImport_ClearCore(interp);
interpreter_clear(interp, current_tstate);
}
@ -843,6 +846,7 @@ PyInterpreterState_Clear(PyInterpreterState *interp)
void
_PyInterpreterState_Clear(PyThreadState *tstate)
{
_PyImport_ClearCore(tstate->interp);
interpreter_clear(tstate->interp, tstate);
}
@ -945,36 +949,6 @@ _PyInterpreterState_DeleteExceptMain(_PyRuntimeState *runtime)
#endif
// Used by finalize_modules()
void
_PyInterpreterState_ClearModules(PyInterpreterState *interp)
{
if (!interp->modules_by_index) {
return;
}
Py_ssize_t i;
for (i = 0; i < PyList_GET_SIZE(interp->modules_by_index); i++) {
PyObject *m = PyList_GET_ITEM(interp->modules_by_index, 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(interp->modules_by_index,
0, PyList_GET_SIZE(interp->modules_by_index),
NULL)) {
PyErr_WriteUnraisable(interp->modules_by_index);
}
}
//----------
// accessors
//----------
@ -1058,11 +1032,12 @@ _PyInterpreterState_RequireIDRef(PyInterpreterState *interp, int required)
PyObject *
_PyInterpreterState_GetMainModule(PyInterpreterState *interp)
{
if (interp->modules == NULL) {
PyObject *modules = _PyImport_GetModules(interp);
if (modules == NULL) {
PyErr_SetString(PyExc_RuntimeError, "interpreter not initialized");
return NULL;
}
return PyMapping_GetItemString(interp->modules, "__main__");
return PyMapping_GetItemString(modules, "__main__");
}
PyObject *
@ -1922,110 +1897,6 @@ done:
}
/****************/
/* module state */
/****************/
PyObject*
PyState_FindModule(PyModuleDef* module)
{
Py_ssize_t index = module->m_base.m_index;
PyInterpreterState *state = _PyInterpreterState_GET();
PyObject *res;
if (module->m_slots) {
return NULL;
}
if (index == 0)
return NULL;
if (state->modules_by_index == NULL)
return NULL;
if (index >= PyList_GET_SIZE(state->modules_by_index))
return NULL;
res = PyList_GET_ITEM(state->modules_by_index, index);
return res==Py_None ? NULL : res;
}
int
_PyState_AddModule(PyThreadState *tstate, PyObject* module, PyModuleDef* def)
{
if (!def) {
assert(_PyErr_Occurred(tstate));
return -1;
}
if (def->m_slots) {
_PyErr_SetString(tstate,
PyExc_SystemError,
"PyState_AddModule called on module with slots");
return -1;
}
PyInterpreterState *interp = tstate->interp;
if (!interp->modules_by_index) {
interp->modules_by_index = PyList_New(0);
if (!interp->modules_by_index) {
return -1;
}
}
while (PyList_GET_SIZE(interp->modules_by_index) <= def->m_base.m_index) {
if (PyList_Append(interp->modules_by_index, Py_None) < 0) {
return -1;
}
}
return PyList_SetItem(interp->modules_by_index,
def->m_base.m_index, Py_NewRef(module));
}
int
PyState_AddModule(PyObject* module, PyModuleDef* def)
{
if (!def) {
Py_FatalError("module definition is NULL");
return -1;
}
PyThreadState *tstate = current_fast_get(&_PyRuntime);
PyInterpreterState *interp = tstate->interp;
Py_ssize_t index = def->m_base.m_index;
if (interp->modules_by_index &&
index < PyList_GET_SIZE(interp->modules_by_index) &&
module == PyList_GET_ITEM(interp->modules_by_index, index))
{
_Py_FatalErrorFormat(__func__, "module %p already added", module);
return -1;
}
return _PyState_AddModule(tstate, module, def);
}
int
PyState_RemoveModule(PyModuleDef* def)
{
PyThreadState *tstate = current_fast_get(&_PyRuntime);
PyInterpreterState *interp = tstate->interp;
if (def->m_slots) {
_PyErr_SetString(tstate,
PyExc_SystemError,
"PyState_RemoveModule called on module with slots");
return -1;
}
Py_ssize_t index = def->m_base.m_index;
if (index == 0) {
Py_FatalError("invalid module index");
}
if (interp->modules_by_index == NULL) {
Py_FatalError("Interpreters module-list not accessible.");
}
if (index > PyList_GET_SIZE(interp->modules_by_index)) {
Py_FatalError("Module index out of bounds.");
}
return PyList_SetItem(interp->modules_by_index, index, Py_NewRef(Py_None));
}
/***********************************/
/* Python "auto thread state" API. */
/***********************************/

10
Python/pythonrun.c
View File

@ -350,14 +350,8 @@ static int
set_main_loader(PyObject *d, PyObject *filename, const char *loader_name)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
PyObject *bootstrap = PyObject_GetAttrString(interp->importlib,
"_bootstrap_external");
if (bootstrap == NULL) {
return -1;
}
PyObject *loader_type = PyObject_GetAttrString(bootstrap, loader_name);
Py_DECREF(bootstrap);
PyObject *loader_type = _PyImport_GetImportlibExternalLoader(interp,
loader_name);
if (loader_type == NULL) {
return -1;
}

40
Python/sysmodule.c
View File

@ -142,6 +142,20 @@ PySys_SetObject(const char *name, PyObject *v)
return sys_set_object_str(interp, name, v);
}
int
_PySys_ClearAttrString(PyInterpreterState *interp,
const char *name, int verbose)
{
if (verbose) {
PySys_WriteStderr("# clear sys.%s\n", name);
}
/* To play it safe, we set the attr to None instead of deleting it. */
if (PyDict_SetItemString(interp->sysdict, name, Py_None) < 0) {
return -1;
}
return 0;
}
static int
should_audit(PyInterpreterState *interp)
@ -1650,7 +1664,7 @@ sys_setdlopenflags_impl(PyObject *module, int new_val)
/*[clinic end generated code: output=ec918b7fe0a37281 input=4c838211e857a77f]*/
{
PyInterpreterState *interp = _PyInterpreterState_GET();
interp->dlopenflags = new_val;
_PyImport_SetDLOpenFlags(interp, new_val);
Py_RETURN_NONE;
}
@ -1668,7 +1682,8 @@ sys_getdlopenflags_impl(PyObject *module)
/*[clinic end generated code: output=e92cd1bc5005da6e input=dc4ea0899c53b4b6]*/
{
PyInterpreterState *interp = _PyInterpreterState_GET();
return PyLong_FromLong(interp->dlopenflags);
return PyLong_FromLong(
_PyImport_GetDLOpenFlags(interp));
}
#endif /* HAVE_DLOPEN */
@ -2279,22 +2294,10 @@ static PyMethodDef sys_methods[] = {
static PyObject *
list_builtin_module_names(void)
{
PyObject *list = PyList_New(0);
PyObject *list = _PyImport_GetBuiltinModuleNames();
if (list == NULL) {
return NULL;
}
struct _inittab *inittab = _PyRuntime.imports.inittab;
for (Py_ssize_t i = 0; inittab[i].name != NULL; i++) {
PyObject *name = PyUnicode_FromString(inittab[i].name);
if (name == NULL) {
goto error;
}
if (PyList_Append(list, name) < 0) {
Py_DECREF(name);
goto error;
}
Py_DECREF(name);
}
if (PyList_Sort(list) != 0) {
goto error;
}
@ -3411,11 +3414,10 @@ _PySys_Create(PyThreadState *tstate, PyObject **sysmod_p)
PyInterpreterState *interp = tstate->interp;
PyObject *modules = PyDict_New();
PyObject *modules = _PyImport_InitModules(interp);
if (modules == NULL) {
goto error;
}
interp->modules = modules;
PyObject *sysmod = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION);
if (sysmod == NULL) {
@ -3428,7 +3430,7 @@ _PySys_Create(PyThreadState *tstate, PyObject **sysmod_p)
}
interp->sysdict = Py_NewRef(sysdict);
if (PyDict_SetItemString(sysdict, "modules", interp->modules) < 0) {
if (PyDict_SetItemString(sysdict, "modules", modules) < 0) {
goto error;
}
@ -3442,7 +3444,7 @@ _PySys_Create(PyThreadState *tstate, PyObject **sysmod_p)
return status;
}
if (_PyImport_FixupBuiltin(sysmod, "sys", interp->modules) < 0) {
if (_PyImport_FixupBuiltin(sysmod, "sys", modules) < 0) {
goto error;
}