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GH-130396: Use computed stack limits on linux (GH-130398)

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* Implement C recursion protection with limit pointers for Linux, MacOS and Windows

* 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 2025-02-25 09:24:48 +00:00 • committed by GitHub
parent 99088ab081
commit 014223649c
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GPG key ID: B5690EEEBB952194
58 changed files with 1295 additions and 1482 deletions
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11
Python/generated_cases.c.h generated
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@ -2222,7 +2222,7 @@
JUMP_TO_PREDICTED(CALL);
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UPDATE_MISS_STATS(CALL);
assert(_PyOpcode_Deopt[opcode] == (CALL));
JUMP_TO_PREDICTED(CALL);
@ -2230,7 +2230,6 @@
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);
@ -3599,14 +3598,13 @@
JUMP_TO_PREDICTED(CALL);
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UPDATE_MISS_STATS(CALL);
assert(_PyOpcode_Deopt[opcode] == (CALL));
JUMP_TO_PREDICTED(CALL);
}
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);
@ -3696,7 +3694,7 @@
JUMP_TO_PREDICTED(CALL);
}
// CPython promises to check all non-vectorcall function calls.
if (tstate->c_recursion_remaining <= 0) {
if (_Py_ReachedRecursionLimit(tstate)) {
UPDATE_MISS_STATS(CALL);
assert(_PyOpcode_Deopt[opcode] == (CALL));
JUMP_TO_PREDICTED(CALL);
@ -3711,7 +3709,6 @@
}
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),
@ -7292,7 +7289,6 @@
/* Restore previous frame and return. */
tstate->current_frame = frame->previous;
assert(!_PyErr_Occurred(tstate));
tstate->c_recursion_remaining += PY_EVAL_C_STACK_UNITS;
PyObject *result = PyStackRef_AsPyObjectSteal(retval);
stack_pointer += -1;
assert(WITHIN_STACK_BOUNDS());
@ -12081,7 +12077,6 @@ JUMP_TO_LABEL(error);
if (frame->owner == FRAME_OWNED_BY_INTERPRETER) {
/* Restore previous frame and exit */
tstate->current_frame = frame->previous;
tstate->c_recursion_remaining += PY_EVAL_C_STACK_UNITS;
return NULL;
}
next_instr = frame->instr_ptr;