C++: Add missing ReadFileEx flow summary#19595
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MathiasVP merged 2 commits intogithub:mainfrom May 27, 2025
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Pull Request Overview
This PR adds flow tests and a summary model for the hEvent field on OVERLAPPED when used with ReadFileEx, ensuring that the field is correctly propagated to completion routines.
- Introduces two new completion routines (
FileIOCompletionRoutine2,FileIOCompletionRoutine3) and correspondingReadFileExtest cases inwindows.cpp. - Updates expected test outputs (
validatemodels.expected,sources.expected,flow.expected,nodes) to reflect the new dataflow. - Adds a new summary entry for
ReadFileExinWindows.model.yml.
Reviewed Changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.
Show a summary per file
| File | Description |
|---|---|
| cpp/ql/test/library-tests/dataflow/external-models/windows.cpp | Added FileIOCompletionRoutine2/3 and two new ReadFileEx tests |
| cpp/ql/test/library-tests/dataflow/external-models/validatemodels.expected | Added unrecognized spec warnings for new hEvent model entries |
| cpp/ql/test/library-tests/dataflow/external-models/sources.expected | Updated source locations for new read/write flows |
| cpp/ql/test/library-tests/dataflow/external-models/flow.expected | Expanded flow edges for the new summary parameters |
| cpp/ql/lib/ext/Windows.model.yml | Inserted a new manual summary entry for ReadFileEx’s hEvent field |
jketema
approved these changes
May 27, 2025
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DCA was uneventful (as expected) |
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The
hEventfield onOVERLAPPEDremains unchanged when passed fromReadFileExto the callback function. This PR adds a summary model that reflects this.Thanks for noticing this funny behavior, @jketema!