8000 gh-84436: Make Interned Strings Immortal by ericsnowcurrently · Pull Request #102887 · python/cpython · GitHub
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gh-84436: Make Interned Strings Immortal #102887

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gh-84436: Make Interned Strings Immortal #102887

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546b934
Factor out add_threadstate().
ericsnowcurrently Mar 21, 2023
0bcd136 8000
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
b649a84
Make objects stored in global containers immortal.
ericsnowcurrently Mar 20, 2023
9b0dc99
Immortalize the interned strings dict.
ericsnowcurrently Mar 22, 2023
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Add _PyRuntime.cached_objects.main_tstate.
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@ericsnowcurrently
ericsnowcurrently committed Mar 22, 2023
commit cba9e34b991f77d28510dc63c636896a21c257fd
4 changes: 4 additions & 0 deletions Include/internal/pycore_global_objects.h
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Expand Up @@ -28,6 +28,10 @@ extern "C" {

struct _Py_cached_objects {
PyObject *interned_strings;
/* A thread state tied to the main interpreter,
used exclusively for when a global object (e.g. interned strings)
is resized (i.e. deallocated + allocated) from an arbitrary thread. */
PyThreadState main_tstate;
};

#define _Py_GLOBAL_OBJECT(NAME) \
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3 changes: 3 additions & 0 deletions Include/internal/pycore_runtime_init.h
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Expand Up @@ -58,6 +58,9 @@ extern PyTypeObject _PyExc_MemoryError;
.types = { \
.next_version_tag = 1, \
}, \
.cached_objects = { \
.main_tstate = _PyThreadState_INIT, \
}, \
.static_objects = { \
.singletons = { \
.small_ints = _Py_small_ints_INIT, \
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4 changes: 4 additions & 0 deletions Python/pylifecycle.c
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Expand Up @@ -635,6 +635,8 @@ pycore_create_interpreter(_PyRuntimeState *runtime,
return status;
}

_PyThreadState_InitDetached(&runtime->cached_objects.main_tstate, interp);

*tstate_p = tstate;
return _PyStatus_OK();
}
Expand Down Expand Up @@ -1928,6 +1930,8 @@ Py_FinalizeEx(void)
// XXX Do this sooner during finalization.
// XXX Ensure finalizer errors are handled properly.

_PyThreadState_ClearDetached(&runtime->cached_objects.main_tstate);

finalize_interp_clear(tstate);
finalize_interp_delete(tstate->interp);

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0