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GH-91079: Implement C stack limits using addresses, not counters. (GH-130007)

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* Implement C recursion protection with limit pointers

* Remove calls to PyOS_CheckStack

* Add stack protection to parser

* Make tests more robust to low stacks

* Improve error messages for stack overflow
This commit is contained in:
Mark Shannon 2025-02-19 11:44:57 +00:00 • committed by GitHub
parent c637bce20a
commit 2498c22fa0
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GPG key ID: B5690EEEBB952194
47 changed files with 1217 additions and 1463 deletions
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9
Python/executor_cases.c.h generated
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@ -5426,14 +5426,13 @@
JUMP_TO_JUMP_TARGET();
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
STAT_INC(CALL, hit);
PyCFunction cfunc = PyCFunction_GET_FUNCTION(callable_o);
_PyStackRef arg = args[0];
_Py_EnterRecursiveCallTstateUnchecked(tstate);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyObject *res_o = _PyCFunction_TrampolineCall(cfunc, PyCFunction_GET_SELF(callable_o), PyStackRef_AsPyObjectBorrow(arg));
stack_pointer = _PyFrame_GetStackPointer(frame);
@ -5813,7 +5812,7 @@
JUMP_TO_JUMP_TARGET();
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
@ -5826,7 +5825,6 @@
}
STAT_INC(CALL, hit);
PyCFunction cfunc = meth->ml_meth;
_Py_EnterRecursiveCallTstateUnchecked(tstate);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyObject *res_o = _PyCFunction_TrampolineCall(cfunc,
PyStackRef_AsPyObjectBorrow(self_stackref),
@ -5984,13 +5982,12 @@
JUMP_TO_JUMP_TARGET();
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
STAT_INC(CALL, hit);
PyCFunction cfunc = meth->ml_meth;
_Py_EnterRecursiveCallTstateUnchecked(tstate);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyObject *res_o = _PyCFunction_TrampolineCall(cfunc, self, NULL);
stack_pointer = _PyFrame_GetStackPointer(frame);