Java: Add support for "View CFG" in VSCode. #21268
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Pull request overview
This PR extracts the control flow graph (CFG) printing implementation from the language-agnostic Cfg.qll file into a dedicated PrintGraph.qll module and adds support for the "View CFG" query in VSCode for Java.
Changes:
- Created a new shared
PrintGraph.qllmodule with reusable logic for printing CFGs in tests, Mermaid diagrams, and VSCode - Refactored
Cfg.qllto use the newPrintGraphmodule instead of inline implementations - Added Java-specific implementation in
ControlFlowGraph.qlland createdprintCfg.qlquery file
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| shared/controlflow/codeql/controlflow/PrintGraph.qll | New shared module containing extracted logic for printing CFGs with support for test output, Mermaid diagrams, and VSCode's "View CFG" feature |
| shared/controlflow/codeql/controlflow/Cfg.qll | Refactored to import and use the new PrintGraph module instead of inline implementations |
| java/ql/lib/semmle/code/java/ControlFlowGraph.qll | Implements PrintGraphInput signature to enable CFG printing for Java |
| java/ql/lib/printCfg.ql | New query file implementing "View CFG" for Java, following the pattern from C#, Ruby, Rust, and Swift |
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Extracts the "View CFG" implementation from
Cfg.qllto its own file and implements it for Java.