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_remote_debugging: Degrade gracefully reads instead of failing the whole read completely #154194
Description
Bug report
Bug description:
The implicit problem found in https://discuss.python.org/t/tachyon-97-error-rate/107619 and, subsequently, in #151022 and #151036 is that we're raising exceptions and discarding the whole sample, when we could degrade gracefully and keep most of the information.
There are are many limits from which we can recover gracefully, by truncating the data. In particular: funcnames, filenames, locations, but also some temporary reads from the target and other walking limits.
Raising exceptions causes very high error rates, when it doesn't really need to be the case. Also, we really don't know what might be the limits found in the real apps.
CPython versions tested on:
CPython main branch
Operating systems tested on:
macOS
Activity
pythongh-154194: Integrate bounded walks and simplify degradation tests
gh-154194: Degrade frames in Tachyon instead of failing the sample (#…
[3.15] gh-154194: Degrade frames in Tachyon instead of failing the sa…
[3.14] gh-154194: Degrade frames instead of failing the sample (GH-15…
Revert "[3.15] pythongh-154194: Degrade frames in Tachyon instead of …
encukou commentedon Oct 6, 2026
In 3.14, the new tests fail on Intel MacOS: https://buildbot.python.org/#/builders/1729/builds/1721
maurycy commentedon Oct 6, 2026
@pablogsal My understanding is that this means that #158874 needs a backport to 3.14
maurycy commentedon Oct 6, 2026
@encukou It's good now https://buildbot.python.org/#/builders/1729/builds/1724 Thank you
[3.15] Restore deferred backports for 3.15.1, including GH-158874 (#1…