8000 gh-100227: Make the Global Interned Dict Safe for Isolated Interpreters by ericsnowcurrently · Pull Request #102925 · python/cpython · GitHub
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gh-100227: Make the Global Interned Dict Safe for Isolated Interpreters #102925

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Merged
merged 17 commits into from
Mar 23, 2023
Merged

gh-100227: Make the Global Interned Dict Safe for Isolated Interpreters #102925

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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
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Add acquire_global_objects_lock() and release_global_objects_lock().
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@ericsnowcurrently
ericsnowcurrently committed Mar 22, 2023
commit 6216207cfa3410a20bed9161bb9f067ded8f97fe
21 changes: 18 additions & 3 deletions Python/pystate.c
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Original file line number Diff line number Diff line change
Expand Up @@ -606,6 +606,22 @@ unbind_global_objects_state(_PyRuntimeState *runtime)
#endif
}

static inline void
acquire_global_objects_lock(_PyRuntimeState *runtime)
{
/* For now we can rely on the GIL, so we don't actually
acquire a global lock here. */
assert(current_fast_get(runtime) != NULL);
}

static inline void
release_global_objects_lock(_PyRuntimeState *runtime)
{
/* For now we can rely on the GIL, so we don't actually
release a global lock here. */
assert(current_fast_get(runtime) != NULL);
}

PyObject *
_Py_AddToGlobalDict(PyObject *dict, PyObject *key, PyObject *value)
{
Expand All @@ -623,7 +639,7 @@ _Py_AddToGlobalDict(PyObject *dict, PyObject *key, PyObject *value)
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. */
// For now we rely on the GIL.
acquire_global_objects_lock(runtime);

/* Swap to the main interpreter, if necessary. */
PyThreadState *oldts = NULL;
Expand Down Expand Up @@ -659,8 +675,7 @@ _Py_AddToGlobalDict(PyObject *dict, PyObject *key, PyObject *value)
unbind_global_objects_state(runtime);
}

// This is where we would release the global lock,
// if we weren't relying on the GIL.
release_global_objects_lock(runtime);

// XXX Immortalize the key and value.

Expand Down
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