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[3.11] gh-104736: Fix test_gdb tests on ppc64le with clang (GH-109360) (#109362) 

gh-104736: Fix test_gdb tests on ppc64le with clang (GH-109360)

Fix test_gdb on Python built with LLVM clang 16 on Linux ppc64le (ex:
Fedora 38). Search patterns in gdb "bt" command output to detect
when gdb fails to retrieve the traceback. For example, skip a test if
"Backtrace stopped: frame did not save the PC" is found.
(cherry picked from commit 44d9a71ea2)

Co-authored-by: Victor Stinner <vstinner@python.org>
This commit is contained in:
Miss Islington (bot) 2023-09-12 21:48:44 -07:00 committed by GitHub
parent df21fdc973
commit 66c0d0ac8c
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8
Lib/test/test_gdb.py
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@ -246,6 +246,14 @@ def get_stack_trace(self, source=None, script=None,
# gh-91960: On Python built with "clang -Og", gdb gets
# "frame=<optimized out>" for _PyEval_EvalFrameDefault() parameter
'(unable to read python frame information)',
# gh-104736: On Python built with "clang -Og" on ppc64le,
# "py-bt" displays a truncated or not traceback, but "where"
# logs this error message:
'Backtrace stopped: frame did not save the PC',
# gh-104736: When "bt" command displays something like:
# "#1 0x0000000000000000 in ?? ()", the traceback is likely
# truncated or wrong.
' ?? ()',
):
if pattern in out:
raise unittest.SkipTest(f"{pattern!r} found in gdb output")

4
Misc/NEWS.d/next/Tests/2023-09-13-05-58-09.gh-issue-104736.lA25Fu.rst Normal file
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@ -0,0 +1,4 @@
Fix test_gdb on Python built with LLVM clang 16 on Linux ppc64le (ex: Fedora
38). Search patterns in gdb "bt" command output to detect when gdb fails to
retrieve the traceback. For example, skip a test if ``Backtrace stopped: frame
did not save the PC`` is found. Patch by Victor Stinner.