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gh-98627: Add an Optional Check for Extension Module Subinterpreter Compatibility (gh-99040)

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Enforcing (optionally) the restriction set by PEP 489 makes sense. Furthermore, this sets the stage for a potential restriction related to a per-interpreter GIL.

This change includes the following:

* add tests for extension module subinterpreter compatibility
* add _PyInterpreterConfig.check_multi_interp_extensions
* add Py_RTFLAGS_MULTI_INTERP_EXTENSIONS
* add _PyImport_CheckSubinterpIncompatibleExtensionAllowed()
* fail iff the module does not implement multi-phase init and the current interpreter is configured to check

https://github.com/python/cpython/issues/98627
This commit is contained in:
Eric Snow 2023-02-15 18:16:00 -07:00 • committed by GitHub
parent 3dea4ba6c1
commit 89ac665891
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15 changed files with 557 additions and 19 deletions
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5
Python/importdl.c
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@ -3,6 +3,7 @@
#include "Python.h"
#include "pycore_call.h"
#include "pycore_import.h"
#include "pycore_pystate.h"
#include "pycore_runtime.h"
@ -203,6 +204,10 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
/* Fall back to single-phase init mechanism */
if (_PyImport_CheckSubinterpIncompatibleExtensionAllowed(name_buf) < 0) {
goto error;
}
if (hook_prefix == nonascii_prefix) {
/* don't allow legacy init for non-ASCII module names */
PyErr_Format(