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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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11
Lib/test/test_gdb.py
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@ -666,15 +666,16 @@ id(a)''')
def test_frames(self):
gdb_output = self.get_stack_trace('''
import sys
def foo(a, b, c):
pass
return sys._getframe(0)
foo(3, 4, 5)
id(foo.__code__)''',
f = foo(3, 4, 5)
id(f)''',
breakpoint='builtin_id',
cmds_after_breakpoint=['print (PyFrameObject*)(((PyCodeObject*)v)->co_zombieframe)']
cmds_after_breakpoint=['print (PyFrameObject*)v']
)
self.assertTrue(re.match(r'.*\s+\$1 =\s+Frame 0x-?[0-9a-f]+, for file <string>, line 3, in foo \(\)\s+.*',
self.assertTrue(re.match(r'.*\s+\$1 =\s+Frame 0x-?[0-9a-f]+, for file <string>, line 4, in foo \(a=3.*',
gdb_output,
re.DOTALL),
'Unexpected gdb representation: %r\n%s' % (gdb_output, gdb_output))