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See https://docs.python.org/3.15/library/threading.html#iterator-synchronization We handle these as simple Models-as-Data models.
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Copilot review overview
🟢 Approval recommended
The models match the Python 3.15 APIs and are covered across normal data flow, taint flow, aliases, callbacks, and container types.
Review effort: Balanced
Findings: None
What changed in this PR
Adds Python 3.15 data-flow models for synchronized iterator utilities.
Changes:
- Models element and taint flow through
serialize_iteratorandconcurrent_tee. - Adds normal-flow and taint-tracking coverage.
- Documents the analysis improvement.
| File | Description |
|---|---|
python/ql/lib/semmle/python/frameworks/Stdlib.model.yml |
Adds threading iterator models. |
python/ql/lib/change-notes/2026-09-30-python315-threading-iterators.md |
Records the new modeling. |
python/ql/test/library-tests/dataflow/threading-iterators/test.py |
Exercises normal data flow. |
python/ql/test/library-tests/dataflow/threading-iterators/test_taint.py |
Exercises taint propagation. |
python/ql/test/library-tests/dataflow/threading-iterators/options |
Configures Python 3 extraction. |
python/ql/test/library-tests/dataflow/threading-iterators/NormalDataflowTest.ql |
Provides the normal-flow test harness. |
python/ql/test/library-tests/dataflow/threading-iterators/NormalDataflowTest.expected |
Contains the generated normal-flow baseline. |
python/ql/test/library-tests/dataflow/threading-iterators/InlineTaintTest.ql |
Provides the taint test harness. |
python/ql/test/library-tests/dataflow/threading-iterators/InlineTaintTest.expected |
Contains the generated taint baseline. |
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See
https://docs.python.org/3.15/library/threading.html#iterator-synchronization
We handle these as simple Models-as-Data models.