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GH-119866: Spill the stack around escaping calls. (GH-124392)

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* Spill the evaluation around escaping calls in the generated interpreter and JIT. 

* The code generator tracks live, cached values so they can be saved to memory when needed.

* Spills the stack pointer around escaping calls, so that the exact stack is visible to the cycle GC.
This commit is contained in:
Mark Shannon 2024-10-07 14:56:39 +01:00 • committed by GitHub
parent cda3b5a576
commit da071fa3e8
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GPG key ID: B5690EEEBB952194
25 changed files with 3841 additions and 2034 deletions
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18
Python/ceval.c
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@ -274,7 +274,6 @@ static void monitor_throw(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr);
static int check_args_iterable(PyThreadState *, PyObject *func, PyObject *vararg);
static int get_exception_handler(PyCodeObject *, int, int*, int*, int*);
static _PyInterpreterFrame *
_PyEvalFramePushAndInit_Ex(PyThreadState *tstate, _PyStackRef func,
@ -394,6 +393,13 @@ const _Py_SpecialMethod _Py_SpecialMethods[] = {
}
};
const size_t _Py_FunctionAttributeOffsets[] = {
[MAKE_FUNCTION_CLOSURE] = offsetof(PyFunctionObject, func_closure),
[MAKE_FUNCTION_ANNOTATIONS] = offsetof(PyFunctionObject, func_annotations),
[MAKE_FUNCTION_KWDEFAULTS] = offsetof(PyFunctionObject, func_kwdefaults),
[MAKE_FUNCTION_DEFAULTS] = offsetof(PyFunctionObject, func_defaults),
[MAKE_FUNCTION_ANNOTATE] = offsetof(PyFunctionObject, func_annotate),
};
// PEP 634: Structural Pattern Matching
@ -1036,6 +1042,7 @@ tier2_dispatch:
uopcode = next_uop->opcode;
#ifdef Py_DEBUG
if (lltrace >= 3) {
dump_stack(frame, stack_pointer);
if (next_uop->opcode == _START_EXECUTOR) {
printf("%4d uop: ", 0);
}
@ -1043,8 +1050,7 @@ tier2_dispatch:
printf("%4d uop: ", (int)(next_uop - current_executor->trace));
}
_PyUOpPrint(next_uop);
printf(" stack_level=%d\n",
(int)(stack_pointer - _PyFrame_Stackbase(frame)));
printf("\n");
}
#endif
next_uop++;
@ -2920,11 +2926,11 @@ _PyEval_CheckExceptStarTypeValid(PyThreadState *tstate, PyObject* right)
return 0;
}
static int
check_args_iterable(PyThreadState *tstate, PyObject *func, PyObject *args)
int
_Py_Check_ArgsIterable(PyThreadState *tstate, PyObject *func, PyObject *args)
{
if (Py_TYPE(args)->tp_iter == NULL && !PySequence_Check(args)) {
/* check_args_iterable() may be called with a live exception:
/* _Py_Check_ArgsIterable() may be called with a live exception:
* clear it to prevent calling _PyObject_FunctionStr() with an
* exception set. */
_PyErr_Clear(tstate);