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gh-100227: Make the Global PyModuleDef Cache Safe for Isolated Interpreters #102938

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ericsnowcurrently wants to merge 23 commits into from
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gh-100227: Make the Global PyModuleDef Cache Safe for Isolated Interpreters #102938

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546b934
Factor out add_threadstate().
ericsnowcurrently Mar 21, 2023
0bcd136
Add _PyThreadState_InitDetached().
ericsnowcurrently Mar 21, 2023
35d5310
Add _PyThreadState_ClearDetached().
ericsnowcurrently Mar 21, 2023
cba9e34
Add _PyRuntime.cached_objects.main_tstate.
ericsnowcurrently Mar 21, 2023
3b1bb8b
Add _Py_AcquireGlobalObjectsState() and _Py_ReleaseGlobalObjectsState().
ericsnowcurrently Mar 22, 2023
eb42aa1
Add _Py_AddToGlobalDict().
ericsnowcurrently Mar 22, 2023
4e9da2d
Drop _Py_AcquireGlobalObjectsState() and _Py_ReleaseGlobalObjectsStat…
ericsnowcurrently Mar 22, 2023
6216207
Add acquire_global_objects_lock() and release_global_objects_lock().
ericsnowcurrently Mar 22, 2023
3c007c0
Add some TODO comments.
ericsnowcurrently Mar 13, 2023
7d95514
Factor out store_interned().
ericsnowcurrently Mar 20, 2023
5c20b84
Store a thread state to use just for interned strings.
ericsnowcurrently Mar 20, 2023
a3ae02a
Always use the main interpreter when possibly resizing the interned d…
ericsnowcurrently Mar 20, 2023
d5fbc37
Use _PyRuntime.cached_objects.main_tstate instead.
ericsnowcurrently Mar 21, 2023
459325f
Add _PyThreadState_IsBound() and _PyThreadState_Unbind().
ericsnowcurrently Mar 21, 2023
4f25244
Make sure the one-off tstate is bound before using it.
ericsnowcurrently Mar 21, 2023
e68535a
Use _Py_AcquireGlobalObjectsState() in store_interned().
ericsnowcurrently Mar 22, 2023
22753b3
Use _Py_AddToGlobalDict().
ericsnowcurrently Mar 22, 2023
5c7bfd7
Move the extensions dict to _PyRuntime.cached_objects.
ericsnowcurrently Mar 22, 2023
f1a33ce
Add _Py_GetFromGlobalDict().
ericsnowcurrently Mar 22, 2023
10e6d69
Add _Py_PopFromGlobalDict().
ericsnowcurrently Mar 22, 2023
7dbae68
Adjust _Py_AddToGlobalDict().
ericsnowcurrently Mar 22, 2023
3e08c1f
Use _Py_PopFromGlobalDict() in unicode_dealloc().
ericsnowcurrently Mar 22, 2023
1039a60
Use the global dict API in import.c.
ericsnowcurrently Mar 22, 2023
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Add _Py_GetFromGlobalDict().
  • Loading branch information
@ericsnowcurrently
ericsnowcurrently committed Mar 22, 2023
commit f1a33ce6f60e7e1dce6a9f0d1aeb1e27cc446d50
1 change: 1 addition & 0 deletions Include/internal/pycore_pystate.h
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Expand Up @@ -130,6 +130,7 @@ PyAPI_FUNC(void) _PyThreadState_DeleteExcept(PyThreadState *tstate);
extern void _PyThreadState_InitDetached(PyThreadState *, PyInterpreterState *);
extern void _PyThreadState_ClearDetached(PyThreadState *);

extern PyObject * _Py_GetFromGlobalDict(PyObject *, PyObject *);
extern PyObject * _Py_AddToGlobalDict(PyObject *, PyObject *, PyObject *);


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17 changes: 17 additions & 0 deletions Python/pystate.c
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Expand Up @@ -622,6 +622,23 @@ release_global_objects_lock(_PyRuntimeState *runtime)
assert(current_fast_get(runtime) != NULL);
}

PyObject *
_Py_GetFromGlobalDict(PyObject *dict, PyObject *key)
{
_PyRuntimeState *runtime = &_PyRuntime;

/* Due to interpreter isolation we must hold a global lock,
starting at this point and ending before we return.
Note that the operations in this function are very fucused
and we should not expect any reentrancy. */
acquire_global_objects_lock(runtime);
/* We don't worry about the global objects state
since there are no memory operations. */
PyObject *value = PyDict_GetItemWithError(dict, key);
release_global_objects_lock(runtime);
return value;
}

PyObject *
_Py_AddToGlobalDict(PyObject *dict, PyObject *key, PyObject *value)
{
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