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bpo-44032: Move data stack to thread from FrameObject. (GH-26076)

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* Remove 'zombie' frames. We won't need them once we are allocating fixed-size frames.

* Add co_nlocalplus field to code object to avoid recomputing size of locals + frees + cells.

* Move locals, cells and freevars out of frame object into separate memory buffer.

* Use per-threadstate allocated memory chunks for local variables.

* Move globals and builtins from frame object to per-thread stack.

* Move (slow) locals frame object to per-thread stack.

* Move internal frame functions to internal header.
This commit is contained in:
Mark Shannon 2021-05-21 10:57:35 +01:00 • committed by GitHub
parent be4dd7fcd9
commit b11a951f16
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GPG key ID: 4AEE18F83AFDEB23
20 changed files with 454 additions and 250 deletions
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6
Objects/typeobject.c
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@ -8836,14 +8836,14 @@ super_init_without_args(PyFrameObject *f, PyCodeObject *co,
return -1;
}
PyObject *obj = f->f_localsplus[0];
PyObject *obj = f->f_localsptr[0];
Py_ssize_t i, n;
if (obj == NULL && co->co_cell2arg) {
/* The first argument might be a cell. */
n = PyTuple_GET_SIZE(co->co_cellvars);
for (i = 0; i < n; i++) {
if (co->co_cell2arg[i] == 0) {
PyObject *cell = f->f_localsplus[co->co_nlocals + i];
PyObject *cell = f->f_localsptr[co->co_nlocals + i];
assert(PyCell_Check(cell));
obj = PyCell_GET(cell);
break;
@ -8871,7 +8871,7 @@ super_init_without_args(PyFrameObject *f, PyCodeObject *co,
if (_PyUnicode_EqualToASCIIId(name, &PyId___class__)) {
Py_ssize_t index = co->co_nlocals +
PyTuple_GET_SIZE(co->co_cellvars) + i;
PyObject *cell = f->f_localsplus[index];
PyObject *cell = f->f_localsptr[index];
if (cell == NULL || !PyCell_Check(cell)) {
PyErr_SetString(PyExc_RuntimeError,
"super(): bad __class__ cell");