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Python: Fix getAGuardedNode

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This commit is contained in:
Rasmus Lerchedahl Petersen
2020-09-14 14:46:15 +02:00
parent 0eb8b6c7b0
commit 543876f980
6 changed files with 62 additions and 11 deletions
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2
python/ql/src/experimental/dataflow/internal/DataFlowPrivate.qll
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@@ -130,7 +130,7 @@ module EssaFlow {
}
predicate useToNextUse(NameNode nodeFrom, NameNode nodeTo) {
AdjacentUses::adjacentUseUseSameVar(nodeFrom, nodeTo)
AdjacentUses::adjacentUseUse(nodeFrom, nodeTo)
}
predicate defToFirstUse(EssaVariable var, NameNode nodeTo) {

9
python/ql/src/experimental/dataflow/internal/DataFlowPublic.qll
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@@ -5,6 +5,7 @@
private import python
private import DataFlowPrivate
import experimental.dataflow.TypeTracker
private import semmle.python.essa.SsaCompute
/**
* IPA type for data flow nodes.
@@ -176,10 +177,10 @@ class BarrierGuard extends GuardNode {
/** Gets a node guarded by this guard. */
final ExprNode getAGuardedNode() {
exists(Variable v, NameNode n, boolean testIsTrue |
n.uses(v) and
this.checks(n, testIsTrue) and
result.asCfgNode().(NameNode).uses(v) and
exists(EssaDefinition def, ControlFlowNode node, boolean testIsTrue |
AdjacentUses::aUse(def, node) and
this.checks(node, testIsTrue) and
AdjacentUses::aUse(def, result.asCfgNode()) and
this.controlsNode(result.asCfgNode(), testIsTrue)
)
}