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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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5
Objects/codeobject.c
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@ -280,6 +280,8 @@ PyCode_NewWithPosOnlyArgs(int argcount, int posonlyargcount, int kwonlyargcount,
co->co_posonlyargcount = posonlyargcount;
co->co_kwonlyargcount = kwonlyargcount;
co->co_nlocals = nlocals;
co->co_nlocalsplus = nlocals +
(int)PyTuple_GET_SIZE(freevars) + (int)PyTuple_GET_SIZE(cellvars);
co->co_stacksize = stacksize;
co->co_flags = flags;
Py_INCREF(code);
@ -304,7 +306,6 @@ PyCode_NewWithPosOnlyArgs(int argcount, int posonlyargcount, int kwonlyargcount,
co->co_linetable = linetable;
Py_INCREF(exceptiontable);
co->co_exceptiontable = exceptiontable;
co->co_zombieframe = NULL;
co->co_weakreflist = NULL;
co->co_extra = NULL;
@ -968,8 +969,6 @@ code_dealloc(PyCodeObject *co)
Py_XDECREF(co->co_exceptiontable);
if (co->co_cell2arg != NULL)
PyMem_Free(co->co_cell2arg);
if (co->co_zombieframe != NULL)
PyObject_GC_Del(co->co_zombieframe);
if (co->co_weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject*)co);
PyObject_Free(co);