test_dtrace leaks temporary files on "PPC64LE CentOS9 LTO + PGO 3.x" buildbot

PPC64LE CentOS9 LTO + PGO 3.x: https://buildbot.python.org/#/builders/885/builds/8098

0:06:23 load avg: 7.34 mem: 67.4 MiB Run 1 test in parallel using 1 worker process (timeout: 40 min, worker timeout: 45 min)
0:06:43 load avg: 7.17 mem: 67.6 MiB [1/1/1] test_dtrace failed (env changed)
Re-running test_dtrace in verbose mode
setUpClass (test.test_dtrace.BPFTraceNormalTests) ... skipped "bpftrace not available: [Errno 2] No such file or directory: 'bpftrace'"
setUpClass (test.test_dtrace.BPFTraceOptimizedTests) ... skipped "bpftrace not available: [Errno 2] No such file or directory: 'bpftrace'"
test_filter_probe_rows_ignores_warnings (test.test_dtrace.BPFTraceOutputTests.test_filter_probe_rows_ignores_warnings) ... ok
test_check_probes (test.test_dtrace.CheckDtraceProbes.test_check_probes) ... ok
test_missing_probes (test.test_dtrace.CheckDtraceProbes.test_missing_probes) ... expected failure
skipped 'dtrace(1) failed: /usr/bin/dtrace invalid option -q\nUsage /usr/bin/dtrace [--help] [-h | -G] [-C [-I<Path>]] -s File.d [-o <File>]'
setUpClass (test.test_dtrace.DTraceOptimizedTests) ... skipped 'dtrace(1) failed: /usr/bin/dtrace invalid option -q\nUsage /usr/bin/dtrace [--help] [-h | -G] [-C [-I<Path>]] -s File.d [-o <File>]'
setUpClass (test.test_dtrace.SystemTapNormalTests) ... skipped 'stap timed out during usability check'
setUpClass (test.test_dtrace.SystemTapOptimizedTests) ... skipped 'stap timed out during usability check'

----------------------------------------------------------------------
Ran 3 tests in 20.343s

OK (skipped=6, expected failures=1)

Warning -- test_dtrace leaked temporary files (2): stap8jlQ00, stapNGGnvV

Linked PRs

• gh-156720

test.test_dtrace とリンクされた PR gh-156720 から始め、PPC64LE CentOS9 buildbot の出力を使って、漏洩した 2 つの一時ファイルを理解します。比較可能な環境で test_dtrace を実行し、スキップされた、またはタイムアウトした SystemTap チェックの後に一時ファイルがクリーンアップされることを確認します。