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bpo-42990: Functions inherit current builtins (GH-24564)

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The types.FunctionType constructor now inherits the current builtins
if the globals dictionary has no "__builtins__" key, rather than
using {"None": None} as builtins: same behavior as eval() and exec()
functions.

Defining a function with "def function(...): ..." in Python is not
affected, globals cannot be overriden with this syntax: it also
inherits the current builtins.

PyFrame_New(), PyEval_EvalCode(), PyEval_EvalCodeEx(),
PyFunction_New() and PyFunction_NewWithQualName() now inherits the
current builtins namespace if the globals dictionary has no
"__builtins__" key.

* Add _PyEval_GetBuiltins() function.
* _PyEval_BuiltinsFromGlobals() now uses _PyEval_GetBuiltins() if
  builtins cannot be found in globals.
* Add tstate parameter to _PyEval_BuiltinsFromGlobals().
This commit is contained in:
Victor Stinner 2021-02-20 15:17:18 +01:00 • committed by GitHub
parent 4233ff3ee4
commit 46496f9d12
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7 changed files with 74 additions and 31 deletions
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5
Include/internal/pycore_ceval.h
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@ -34,7 +34,10 @@ PyAPI_FUNC(void) _PyEval_SetCoroutineOriginTrackingDepth(
void _PyEval_Fini(void);
extern PyObject *_PyEval_BuiltinsFromGlobals(PyObject *globals);
extern PyObject* _PyEval_GetBuiltins(PyThreadState *tstate);
extern PyObject *_PyEval_BuiltinsFromGlobals(
PyThreadState *tstate,
PyObject *globals);
static inline PyObject*