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

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Merged
ericsnowcurrently 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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Use _PyRuntime.cached_objects.main_tstate instead.
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@ericsnowcurrently
ericsnowcurrently committed Mar 22, 2023
commit d5fbc37edb8e2c3e983ef79e78c861e1e16b9ce8
6 changes: 1 addition & 5 deletions Include/internal/pycore_unicodeobject.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,12 +33,8 @@ struct _Py_unicode_runtime_ids {
};

struct _Py_unicode_runtime_state {
struct {
PyThreadState *tstate;
/* The actual interned dict is at
_PyRuntime.cached_objects.interned_strings. */
} interned;
struct _Py_unicode_runtime_ids ids;
/* The interned dict is at _PyRuntime.cached_objects.interned_strings. */
};

/* fs_codec.encoding is initialized to NULL.
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29 changes: 1 addition & 28 deletions Objects/unicodeobject.c
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Expand Up @@ -14588,29 +14588,7 @@ _PyUnicode_InitTypes(PyInterpreterState *interp)
static PyThreadState *
get_interned_tstate(void)
{
PyThreadState *tstate = _PyRuntime.unicode_state.interned.tstate;
if (tstate == NULL) {
PyInterpreterState *main_interp = _PyInterpreterState_Main();
/* We do not "bind" the thread state here. */
tstate = _PyThreadState_New(main_interp);
if (tstate == NULL) {
PyErr_Clear();
return NULL;
}
_PyRuntime.unicode_state.interned.tstate = tstate;
}
return tstate;
}

static void
clear_interned_tstate(void)
{
PyThreadState *tstate = _PyRuntime.unicode_state.interned.tstate;
if (tstate != NULL) {
_PyRuntime.unicode_state.interned.tstate = NULL;
PyThreadState_Clear(tstate);
PyThreadState_Delete(tstate);
}
return &_PyRuntime.cached_objects.main_tstate;
}

static inline PyObject *
Expand All @@ -14623,9 +14601,6 @@ store_interned(PyObject *obj)
PyThreadState *oldts = NULL;
if (!_Py_IsMainInterpreter(_PyInterpreterState_GET())) {
PyThreadState *main_tstate = get_interned_tstate();
if (main_tstate == NULL) {
return NULL;
}
oldts = PyThreadState_Swap(main_tstate);
assert(oldts != NULL);
}
Expand Down Expand Up @@ -14750,8 +14725,6 @@ _PyUnicode_ClearInterned(PyInterpreterState *interp)
PyDict_Clear(interned);
Py_DECREF(interned);
set_interned_dict(NULL);

clear_interned_tstate();
}


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