e68f2fd717
Preparatory refactor for the shared-CFG dataflow migration. Adds the new Python CFG library additively, without changing any production behaviour. Library additions: - semmle.python.controlflow.internal.AstNodeImpl — mediates between the Python AST and the shared codeql.controlflow.ControlFlowGraph signature. Wraps Python's Stmt/Expr/Scope/Pattern and adds two synthetic kinds of node (BlockStmt for body slots, intermediate nodes for multi-operand boolean expressions). - semmle.python.controlflow.internal.Cfg — public facade re-exposing the same API surface as semmle/python/Flow.qll (ControlFlowNode, CallNode, BasicBlock, NameNode, DefinitionNode, CompareNode, ...), backed by the shared CFG. - lib/printCfgNew.ql — debug/visualisation query for the new CFG. - consistency-queries/CfgConsistency.ql — consistency query running the shared CFG's standard checks against Python. Shared library: - shared.controlflow.ControlFlowGraph — adds two defaulted getWhileElse / getForeachElse predicates to AstSig so Python can model while-else / for-else (no behavioural change for other languages). Test additions: - ControlFlow/bindings/* — annotation-driven SSA-binding tests for the new CFG (annassign, compound, comprehension, decorated, except_handler, imports, match_pattern, parameters, simple, type_params, walrus_starred, with_stmt, dead_under_no_raise). - ControlFlow/store-load/* — basic store/load coverage. - ControlFlow/evaluation-order/NewCfg*.ql — mirrors of the existing OldCfg evaluation-order self-validation suite, run against the new CFG via NewCfgImpl.qll. - Minor extensions to existing test_if.py / test_boolean.py + cosmetic .expected churn on a handful of OldCfg tests. No dataflow, SSA, or production query is migrated yet — that lands in follow-up PRs. The new CFG library has zero callers in lib/ and src/. Verified by: - All lib + src + consistency-queries compile clean (367 queries). - All 56 ControlFlow library-tests pass. - All 474 dataflow + PointsTo library-tests + consistency tests pass. - syntax_error/CONSISTENCY/CfgConsistency passes. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
CodeQL
This open source repository contains the standard CodeQL libraries and queries that power GitHub Advanced Security and the other application security products that GitHub makes available to its customers worldwide.
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License
The code in this repository is licensed under the MIT License by GitHub.
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CodeQL for Visual Studio Code
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