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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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20 changed files with 454 additions and 250 deletions
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6
Lib/test/test_sys.py
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@ -1274,11 +1274,7 @@ class SizeofTest(unittest.TestCase):
# frame
import inspect
x = inspect.currentframe()
ncells = len(x.f_code.co_cellvars)
nfrees = len(x.f_code.co_freevars)
localsplus = x.f_code.co_stacksize + x.f_code.co_nlocals +\
ncells + nfrees
check(x, vsize('8P3i3c' + localsplus*'P'))
check(x, size('5P3i4cP'))
# function
def func(): pass
check(func, size('14P'))