From 0041087aa12044223103c7b8a3ca07d896652ab9 Mon Sep 17 00:00:00 2001 From: "Miss Islington (bot)" <31488909+miss-islington@users.noreply.github.com> Date: Wed, 12 Jun 2024 19:15:16 +0200 Subject: [PATCH] [3.13] gh-71587: Drop local reference cache to `_strptime` module in `_datetime` (gh-120424) The _strptime module object was cached in a static local variable (in the datetime.strptime() implementation). That's a problem when it crosses isolation boundaries, such as reinitializing the runtme or between interpreters. This change fixes the problem by dropping the static variable, instead always relying on the normal sys.modules cache (via PyImport_Import()). (cherry picked from commit 127c1d2771749853e287632c086b6054212bf12a, AKA gh-120224) Co-authored-by: neonene <53406459+neonene@users.noreply.github.com> --- .../pycore_global_objects_fini_generated.h | 1 + Include/internal/pycore_global_strings.h | 1 + Include/internal/pycore_runtime_init_generated.h | 1 + Include/internal/pycore_unicodeobject_generated.h | 3 +++ Lib/test/test_embed.py | 9 +++++++++ .../2024-06-07-11-23-31.gh-issue-71587.IjFajE.rst | 2 ++ Modules/_datetimemodule.c | 14 +++++++------- Tools/c-analyzer/cpython/globals-to-fix.tsv | 1 - 8 files changed, 24 insertions(+), 8 deletions(-) create mode 100644 Misc/NEWS.d/next/Library/2024-06-07-11-23-31.gh-issue-71587.IjFajE.rst diff --git a/Include/internal/pycore_global_objects_fini_generated.h b/Include/internal/pycore_global_objects_fini_generated.h index a40f007bdac..07d96bab707 100644 --- a/Include/internal/pycore_global_objects_fini_generated.h +++ b/Include/internal/pycore_global_objects_fini_generated.h @@ -776,6 +776,7 @@ _PyStaticObjects_CheckRefcnt(PyInterpreterState *interp) { _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_showwarnmsg)); _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_shutdown)); _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_slotnames)); + _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_strptime)); _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_strptime_datetime)); _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_swappedbytes_)); _PyStaticObject_CheckRefcnt((PyObject *)&_Py_ID(_type_)); diff --git a/Include/internal/pycore_global_strings.h b/Include/internal/pycore_global_strings.h index eaf81e4f115..9b2becdb132 100644 --- a/Include/internal/pycore_global_strings.h +++ b/Include/internal/pycore_global_strings.h @@ -265,6 +265,7 @@ struct _Py_global_strings { STRUCT_FOR_ID(_showwarnmsg) STRUCT_FOR_ID(_shutdown) STRUCT_FOR_ID(_slotnames) + STRUCT_FOR_ID(_strptime) STRUCT_FOR_ID(_strptime_datetime) STRUCT_FOR_ID(_swappedbytes_) STRUCT_FOR_ID(_type_) diff --git a/Include/internal/pycore_runtime_init_generated.h b/Include/internal/pycore_runtime_init_generated.h index b18c2684691..6a38b2085c4 100644 --- a/Include/internal/pycore_runtime_init_generated.h +++ b/Include/internal/pycore_runtime_init_generated.h @@ -774,6 +774,7 @@ extern "C" { INIT_ID(_showwarnmsg), \ INIT_ID(_shutdown), \ INIT_ID(_slotnames), \ + INIT_ID(_strptime), \ INIT_ID(_strptime_datetime), \ INIT_ID(_swappedbytes_), \ INIT_ID(_type_), \ diff --git a/Include/internal/pycore_unicodeobject_generated.h b/Include/internal/pycore_unicodeobject_generated.h index 87e22ac39c1..16502bb4dea 100644 --- a/Include/internal/pycore_unicodeobject_generated.h +++ b/Include/internal/pycore_unicodeobject_generated.h @@ -636,6 +636,9 @@ _PyUnicode_InitStaticStrings(PyInterpreterState *interp) { string = &_Py_ID(_slotnames); assert(_PyUnicode_CheckConsistency(string, 1)); _PyUnicode_InternInPlace(interp, &string); + string = &_Py_ID(_strptime); + assert(_PyUnicode_CheckConsistency(string, 1)); + _PyUnicode_InternInPlace(interp, &string); string = &_Py_ID(_strptime_datetime); assert(_PyUnicode_CheckConsistency(string, 1)); _PyUnicode_InternInPlace(interp, &string); diff --git a/Lib/test/test_embed.py b/Lib/test/test_embed.py index d94c63a13b8..634513ec7a5 100644 --- a/Lib/test/test_embed.py +++ b/Lib/test/test_embed.py @@ -404,6 +404,15 @@ class EmbeddingTests(EmbeddingTestsMixin, unittest.TestCase): out, err = self.run_embedded_interpreter("test_repeated_init_exec", code) self.assertEqual(out, '9\n' * INIT_LOOPS) + def test_datetime_reset_strptime(self): + code = ( + "import datetime;" + "d = datetime.datetime.strptime('2000-01-01', '%Y-%m-%d');" + "print(d.strftime('%Y%m%d'))" + ) + out, err = self.run_embedded_interpreter("test_repeated_init_exec", code) + self.assertEqual(out, '20000101\n' * INIT_LOOPS) + @unittest.skipIf(_testinternalcapi is None, "requires _testinternalcapi") class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase): diff --git a/Misc/NEWS.d/next/Library/2024-06-07-11-23-31.gh-issue-71587.IjFajE.rst b/Misc/NEWS.d/next/Library/2024-06-07-11-23-31.gh-issue-71587.IjFajE.rst new file mode 100644 index 00000000000..50a66297799 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2024-06-07-11-23-31.gh-issue-71587.IjFajE.rst @@ -0,0 +1,2 @@ +Fix crash in C version of :meth:`datetime.datetime.strptime` when called again +on the restarted interpreter. diff --git a/Modules/_datetimemodule.c b/Modules/_datetimemodule.c index d6fa273c75e..7db30303236 100644 --- a/Modules/_datetimemodule.c +++ b/Modules/_datetimemodule.c @@ -5511,19 +5511,19 @@ datetime_utcfromtimestamp(PyObject *cls, PyObject *args) static PyObject * datetime_strptime(PyObject *cls, PyObject *args) { - static PyObject *module = NULL; - PyObject *string, *format; + PyObject *string, *format, *result; if (!PyArg_ParseTuple(args, "UU:strptime", &string, &format)) return NULL; + PyObject *module = PyImport_Import(&_Py_ID(_strptime)); if (module == NULL) { - module = PyImport_ImportModule("_strptime"); - if (module == NULL) - return NULL; + return NULL; } - return PyObject_CallMethodObjArgs(module, &_Py_ID(_strptime_datetime), - cls, string, format, NULL); + result = PyObject_CallMethodObjArgs(module, &_Py_ID(_strptime_datetime), + cls, string, format, NULL); + Py_DECREF(module); + return result; } /* Return new datetime from date/datetime and time arguments. */ diff --git a/Tools/c-analyzer/cpython/globals-to-fix.tsv b/Tools/c-analyzer/cpython/globals-to-fix.tsv index aeb7cad9e02..06e58e92184 100644 --- a/Tools/c-analyzer/cpython/globals-to-fix.tsv +++ b/Tools/c-analyzer/cpython/globals-to-fix.tsv @@ -434,7 +434,6 @@ Modules/_ctypes/_ctypes.c CreateSwappedType swapped_suffix - Modules/_ctypes/_ctypes.c - _unpickle - Modules/_ctypes/_ctypes.c PyCArrayType_from_ctype array_cache - Modules/_cursesmodule.c - ModDict - -Modules/_datetimemodule.c datetime_strptime module - ## state Modules/_ctypes/_ctypes.c - _ctypes_ptrtype_cache -