The fallback to find the current frame in the gdb helpers fails for inlined frames

[pablogsal]

BPO	45637
Nosy	@markshannon, @pablogsal
PRs	bpo-45637: Remove broken fallback in gdb helpers to obtain frame variable #29257 bpo-45637: Store the frame pointer in the cframe #29267 bpo-45637: Fix cframe-based fallback in the gdb helpers #29515

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-11-10.13:50:11.587>
created_at = <Date 2021-10-27.23:26:30.245>
labels = ['interpreter-core', '3.11']
title = 'The fallback to find the current frame in the gdb helpers fails for inlined frames'
updated_at = <Date 2021-11-10.13:50:11.586>
user = 'https://github.com/pablogsal'

bugs.python.org fields:

activity = <Date 2021-11-10.13:50:11.586>
actor = 'pablogsal'
assignee = 'none'
closed = True
closed_date = <Date 2021-11-10.13:50:11.587>
closer = 'pablogsal'
components = ['Interpreter Core']
creation = <Date 2021-10-27.23:26:30.245>
creator = 'pablogsal'
dependencies = []
files = []
hgrepos = []
issue_num = 45637
keywords = ['patch']
message_count = 4.0
messages = ['405140', '405183', '406011', '406096']
nosy_count = 2.0
nosy_names = ['Mark.Shannon', 'pablogsal']
pr_nums = ['29257', '29267', '29515']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue45637'
versions = ['Python 3.11']

[pablogsal]

This code does not work in the presence of inlined Python calls:

cpython/Tools/gdb/libpython.py

Lines 1804 to 1813 in d02ffd1

	# gdb is unable to get the "frame" argument of PyEval_EvalFrameEx()
	# because it was "optimized out". Try to get "frame" from the frame
	# of the caller, _PyEval_Vector().
	orig_frame = frame
	caller = self._gdbframe.older()
	if caller:
	frame = caller.read_var('frame')
	frame = PyFramePtr(frame)
	if not frame.is_optimized_out():
	return frame

[pablogsal]

New changeset f291404 by Mark Shannon in branch 'main':
bpo-45637: Store the frame pointer in the cframe (GH-29267)
f291404

[pablogsal]

New changeset f4c0348 by Pablo Galindo Salgado in branch 'main':
bpo-45637: Remove broken fallback in gdb helpers to obtain frame variable (GH-29257)
f4c0348

[pablogsal]

New changeset 20205ad by Pablo Galindo Salgado in branch 'main':
bpo-45637: Fix cframe-based fallback in the gdb helpers (GH-29515)
20205ad