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This was amended as part of https://github.com/github/codeql/pull/12186, but the conversion was inadequate because the new implementation didn't work when a sink (type conversion) led directly to a non-`localTaintStep` step, such as a store step or an interprocedural step. Here I move the sink back one step to the argument of the type conversion and sanitize the result of the conversion instead, to ensure there is always a unique local successor to a sink. This should eliminate unexpected extra results that resulted from https://github.com/github/codeql/pull/12186. Independently there are also *lost* results that stem from needing a higher `fieldFlowBranchLimit` that are not addressed in this PR, but raising that limit is a performance risk and so I will address this separately.
Go analysis support for CodeQL
This sub-folder contains the extractor, CodeQL libraries, and queries that power Go support for CodeQL.
It contains two major components:
- an extractor, itself written in Go, that parses Go source code and converts it into a database that can be queried using CodeQL.
- static analysis libraries and queries written in CodeQL that can be used to analyze such a database to find coding mistakes or security vulnerabilities.
Usage
To analyze a Go codebase, either use the CodeQL command-line interface to create a database yourself, or download a pre-built database from GitHub.com. You can then run any of the queries contained in this repository either on the command line or using the VS Code extension.
Contributions
Contributions are welcome! Please see our contribution guidelines and our code of conduct for details on how to participate in our community.
Licensing
The code in this repository is licensed under the MIT license.