52d2bebd1c
This changes the flow to be taint rather than data flow, and it extends it to include chi instructions with unknown type as long as they're not for the `AliasedVirtualVariable`. We're losing three good test results because these tests are not affected by `DefaultTaintTracking.qll`. The taint step added here can later be ported to `TaintTrackingUtil.qll` to recover these results, but we probably want a better API than transitive-closure search through instructions before doing that.
CodeQL
This open source repository contains the standard CodeQL libraries and queries that power LGTM, and the other products that Semmle makes available to its customers worldwide.
How do I learn CodeQL and run queries?
There is extensive documentation on getting started with writing CodeQL. You can use the interactive query console on LGTM.com or the CodeQL for Visual Studio Code extension to try out your queries on any open source project that's currently being analyzed.
Contributing
We welcome contributions to our standard library and standard checks. Do you have an idea for a new check, or how to improve an existing query? Then please go ahead and open a pull request! Before you do, though, please take the time to read our contributing guidelines. You can also consult our style guides to learn how to format your code for consistency and clarity, how to write query metadata, and how to write query help documentation for your query.
License
The code in this repository is licensed under Apache License 2.0 by Semmle.