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GH-96421: Insert shim frame on entry to interpreter (GH-96319)

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* Adds EXIT_INTERPRETER instruction to exit PyEval_EvalDefault()

* Simplifies RETURN_VALUE, YIELD_VALUE and RETURN_GENERATOR instructions as they no longer need to check for entry frames.
This commit is contained in:
Mark Shannon 2022-11-10 04:34:57 -08:00 • committed by GitHub
parent dbf2faf579
commit 1e197e63e2
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GPG key ID: 4AEE18F83AFDEB23
24 changed files with 450 additions and 346 deletions
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4
Python/frame.c
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@ -80,6 +80,7 @@ _PyFrame_Copy(_PyInterpreterFrame *src, _PyInterpreterFrame *dest)
static void
take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
{
assert(frame->owner != FRAME_OWNED_BY_CSTACK);
assert(frame->owner != FRAME_OWNED_BY_FRAME_OBJECT);
assert(frame->owner != FRAME_CLEARED);
Py_ssize_t size = ((char*)&frame->localsplus[frame->stacktop]) - (char *)frame;
@ -99,7 +100,9 @@ take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
while (prev && _PyFrame_IsIncomplete(prev)) {
prev = prev->previous;
}
frame->previous = NULL;
if (prev) {
assert(prev->owner != FRAME_OWNED_BY_CSTACK);
/* Link PyFrameObjects.f_back and remove link through _PyInterpreterFrame.previous */
PyFrameObject *back = _PyFrame_GetFrameObject(prev);
if (back == NULL) {
@ -111,7 +114,6 @@ take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
else {
f->f_back = (PyFrameObject *)Py_NewRef(back);
}
frame->previous = NULL;
}
if (!_PyObject_GC_IS_TRACKED((PyObject *)f)) {
_PyObject_GC_TRACK((PyObject *)f);