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gh-102251: Explicitly free state for test modules with state in test_import #105085

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Merged
erlend-aasland merged 8 commits into from
May 31, 2023
Merged

gh-102251: Explicitly free state for test modules with state in test_import #105085

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f4de1f7
clear module state after use
sunmy2019 May 30, 2023
bd32c13
PEP 7
erlend-aasland May 30, 2023
ac72ac4
use `unittest.addCleanup`
sunmy2019 May 30, 2023
764be66
Update Modules/_testsinglephase.c
sunmy2019 May 30, 2023
52f46f2
Update Lib/test/test_import/__init__.py
sunmy2019 May 30, 2023
daebdf7
Update Lib/test/test_import/__init__.py
sunmy2019 May 30, 2023
a0f5bb7
Update Lib/test/test_import/__init__.py
sunmy2019 May 30, 2023
26a9ede
tell by `has_state` instead of name
sunmy2019 May 30, 2023
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clear module state after use
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@sunmy2019
sunmy2019 committed May 30, 2023
commit f4de1f7e2f5703468deaa75dc8f5f42193d1ad0d
8 changes: 8 additions & 0 deletions Lib/test/test_import/__init__.py
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Expand Up @@ -2330,6 +2330,9 @@ def test_variants(self):
self.assertIs(basic.look_up_self(), basic_lookedup)
self.assertEqual(basic.initialized_count(), expected_init_count)

loaded.module._clear_module_state()
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def test_basic_reloaded(self):
# m_copy is copied into the existing module object.
# Global state is not changed.
Expand Down Expand Up @@ -2413,6 +2416,11 @@ def test_with_reinit_reloaded(self):

self.assertIs(reloaded.snapshot.cached, reloaded.module)

if name == f'{self.NAME}_with_state':
loaded.module._clear_module_state()
reloaded.module._clear_module_state()
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# Currently, for every single-phrase init module loaded
# in multiple interpreters, those interpreters share a
# PyModuleDef for that object, which can be a problem.
Expand Down
21 changes: 20 additions & 1 deletion Modules/_testsinglephase.c
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Expand Up @@ -248,6 +248,24 @@ basic__clear_globals(PyObject *self, PyObject *Py_UNUSED(ignored))
basic__clear_globals_doc}


PyDoc_STRVAR(basic__clear_module_state_doc, "_clear_module_state()\n\
\n\
Free the module state and set it to uninitialized.");

static PyObject*
basic__clear_module_state(PyObject *self, PyObject *Py_UNUSED(ignored)) {
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module_state *state = get_module_state(self);
if (state != NULL) {
clear_state(state);
}
Py_RETURN_NONE;
}

#define _CLEAR_MODULE_STATE_METHODDEF \
{"_clear_module_state", basic__clear_module_state, METH_NOARGS, \
basic__clear_module_state_doc}


/*********************************************/
/* the _testsinglephase module (and aliases) */
/*********************************************/
Expand Down Expand Up @@ -408,7 +426,7 @@ PyInit__testsinglephase_with_reinit(void)
/* the _testsinglephase_with_state module */
/******************************************/

/* This ia less typical of legacy extensions in the wild:
/* This is a less typical of legacy extensions in the wild:
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- single-phase init (same as _testsinglephase above)
- has some module state
- supports repeated initialization
Expand All @@ -424,6 +442,7 @@ static PyMethodDef TestMethods_WithState[] = {
LOOK_UP_SELF_METHODDEF,
SUM_METHODDEF,
STATE_INITIALIZED_METHODDEF,
_CLEAR_MODULE_STATE_METHODDEF,
{NULL, NULL} /* sentinel */
};

Expand Down