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Merge pull request #4649 from yoff/python-dataflow-cfgparameters
Python: Make `ParameterNode` a `CfgNode`
2 parents fc764db + 0710963 commit 6113985

22 files changed

Lines changed: 632 additions & 438 deletions

‎python/ql/src/semmle/python/dataflow/new/internal/DataFlowPrivate.qll‎

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@@ -139,6 +139,11 @@ module EssaFlow {
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contextManager.strictlyDominates(var)
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)
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or
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exists(ParameterDefinition pd |
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nodeFrom.asCfgNode() = pd.getDefiningNode() and
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nodeTo.asVar() = pd.getVariable()
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)
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or
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// First use after definition
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// `y = 42`
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// `x = f(y)`

‎python/ql/src/semmle/python/dataflow/new/internal/DataFlowPublic.qll‎

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@@ -176,21 +176,21 @@ ExprNode exprNode(DataFlowExpr e) { result.getNode().getNode() = e }
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* The value of a parameter at function entry, viewed as a node in a data
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* flow graph.
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*/
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class ParameterNode extends EssaNode {
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ParameterNode() { var instanceof ParameterDefinition }
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class ParameterNode extends CfgNode {
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ParameterDefinition def;
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ParameterNode() { node = def.getDefiningNode() }
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/**
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* Holds if this node is the parameter of callable `c` at the
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* (zero-based) index `i`.
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*/
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predicate isParameterOf(DataFlowCallable c, int i) {
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var.(ParameterDefinition).getDefiningNode() = c.getParameter(i)
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}
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predicate isParameterOf(DataFlowCallable c, int i) { node = c.getParameter(i) }
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override DataFlowCallable getEnclosingCallable() { this.isParameterOf(result, _) }
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/** Gets the `Parameter` this `ParameterNode` represents. */
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Parameter getParameter() { result = var.(ParameterDefinition).getParameter() }
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Parameter getParameter() { result = def.getParameter() }
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}
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/**

‎python/ql/test/experimental/dataflow/basic/callGraph.expected‎

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| test.py:4:10:4:10 | ControlFlowNode for z | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | SSA variable x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |

‎python/ql/test/experimental/dataflow/basic/callGraphSinks.expected‎

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| test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |

‎python/ql/test/experimental/dataflow/basic/global.expected‎

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@@ -1,6 +1,14 @@
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| test.py:1:1:1:21 | ControlFlowNode for FunctionExpr | test.py:1:5:1:17 | GSSA Variable obfuscated_id |
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| test.py:1:1:1:21 | ControlFlowNode for FunctionExpr | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | SSA variable x | test.py:3:3:3:3 | SSA variable z |
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| test.py:3:7:3:7 | ControlFlowNode for y | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:4:10:4:10 | ControlFlowNode for z | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:4:10:4:10 | ControlFlowNode for z | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:1:19:1:19 | SSA variable x |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:2:3:2:3 | SSA variable y |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:6:1:6:1 | GSSA Variable a | test.py:7:19:7:19 | ControlFlowNode for a |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:1:19:1:19 | SSA variable x |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:2:3:2:3 | SSA variable y |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:7:19:7:19 | ControlFlowNode for a |
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| test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | SSA variable x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:2:3:2:3 | SSA variable y |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:2:7:2:7 | ControlFlowNode for x |

‎python/ql/test/experimental/dataflow/basic/globalStep.expected‎

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| test.py:1:1:1:21 | ControlFlowNode for FunctionExpr | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:3:2:3 | SSA variable y |
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| test.py:6:5:6:6 | ControlFlowNode for IntegerLiteral | test.py:7:19:7:19 | ControlFlowNode for a |
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| test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | SSA variable x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | SSA variable x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |
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| test.py:7:19:7:19 | ControlFlowNode for a | test.py:7:5:7:20 | ControlFlowNode for obfuscated_id() |

‎python/ql/test/experimental/dataflow/basic/local.expected‎

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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:1:5:1:17 | GSSA Variable obfuscated_id |
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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:3:3:3 | SSA variable z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | SSA variable x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:3:2:3 | SSA variable y |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:7:2:7 | ControlFlowNode for x |

‎python/ql/test/experimental/dataflow/basic/localStep.expected‎

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| test.py:1:1:1:21 | ControlFlowNode for FunctionExpr | test.py:1:5:1:17 | GSSA Variable obfuscated_id |
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| test.py:1:5:1:17 | GSSA Variable obfuscated_id | test.py:7:5:7:17 | ControlFlowNode for obfuscated_id |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:1:19:1:19 | SSA variable x |
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| test.py:1:19:1:19 | SSA variable x | test.py:2:7:2:7 | ControlFlowNode for x |
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| test.py:2:3:2:3 | SSA variable y | test.py:3:7:3:7 | ControlFlowNode for y |
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| test.py:2:7:2:7 | ControlFlowNode for x | test.py:2:3:2:3 | SSA variable y |

‎python/ql/test/experimental/dataflow/basic/maximalFlows.expected‎

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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | ControlFlowNode for x | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:1:19:1:19 | SSA variable x | test.py:4:10:4:10 | ControlFlowNode for z |
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| test.py:1:19:1:19 | SSA variable x | test.py:7:1:7:1 | GSSA Variable b |
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| test.py:2:3:2:3 | SSA variable y | test.py:4:10:4:10 | ControlFlowNode for z |

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