JS: Generate legacy flow steps for all flow summaries #20169
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Pull Request Overview
This PR ensures that legacy data flow/taint tracking libraries receive flow steps for all flow summaries, not just those that are unsupported by the new flow summary system. Previously, legacy flow steps were only generated for summaries that couldn't be handled as proper flow summaries, but legacy libraries don't use SummarizedCallables at all and need steps for all summaries.
Key Changes:
- Modified the logic to generate legacy flow steps for all flow summaries instead of only unsupported ones
- Added new legacy flow step classes that handle all summary-based steps
- Updated the test expectations to reflect that legacy and new data flow libraries now have consistent behavior
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| javascript/ql/lib/semmle/javascript/frameworks/data/ModelsAsData.qll | Added logic to generate legacy flow steps for all summaries and created separate legacy step classes |
| javascript/ql/test/library-tests/frameworks/data/test.expected | Updated test expectations to remove differences between legacy and new data flow libraries |
Napalys
approved these changes
Aug 6, 2025
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#19445 follow up: The legacy data flow/taint tracking libraries do not use
SummarizedCallables, so we still need to generate local flow steps for all summaries.