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bpo-40453: Add PyConfig._isolated_subinterpreter (GH-19820)

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An isolated subinterpreter cannot spawn threads, spawn a child
process or call os.fork().

* Add private _Py_NewInterpreter(isolated_subinterpreter) function.
* Add isolated=True keyword-only parameter to
  _xxsubinterpreters.create().
* Allow again os.fork() in "non-isolated" subinterpreters.
This commit is contained in:
Victor Stinner 2020-05-01 11:33:44 +02:00 • committed by GitHub
parent 8bcfd31cc0
commit 252346acd9
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 68 additions and 12 deletions
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3
Python/initconfig.c
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@ -632,6 +632,7 @@ _PyConfig_InitCompatConfig(PyConfig *config)
config->check_hash_pycs_mode = NULL;
config->pathconfig_warnings = -1;
config->_init_main = 1;
config->_isolated_interpreter = 0;
#ifdef MS_WINDOWS
config->legacy_windows_stdio = -1;
#endif
@ -850,6 +851,7 @@ _PyConfig_Copy(PyConfig *config, const PyConfig *config2)
COPY_WSTR_ATTR(check_hash_pycs_mode);
COPY_ATTR(pathconfig_warnings);
COPY_ATTR(_init_main);
COPY_ATTR(_isolated_interpreter);
#undef COPY_ATTR
#undef COPY_WSTR_ATTR
@ -949,6 +951,7 @@ config_as_dict(const PyConfig *config)
SET_ITEM_WSTR(check_hash_pycs_mode);
SET_ITEM_INT(pathconfig_warnings);
SET_ITEM_INT(_init_main);
SET_ITEM_INT(_isolated_interpreter);
return dict;