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34 lines
860 B
Plaintext
34 lines
860 B
Plaintext
import cpp
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import semmle.code.cpp.dataflow.old.DataFlow
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class EdgeToExcept extends AdditionalControlFlowEdge {
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EdgeToExcept() {
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mkElement(this) instanceof Call and
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exists(getNearestTryExceptParent(mkElement(this)))
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}
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override ControlFlowNode getAnEdgeTarget() {
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result = getNearestTryExceptParent(mkElement(this)).getExcept()
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}
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}
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MicrosoftTryExceptStmt getNearestTryExceptParent(Expr e) { result = getANearParent(e) }
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private Element getANearParent(Expr e) {
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result = e.getParent()
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or
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exists(Element prev |
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result = prev.(Expr).getParent()
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or
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result = prev.(Stmt).getParent()
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// do not recurse past __try
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not prev instanceof MicrosoftTryStmt and
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prev = getANearParent(e)
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)
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}
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from DataFlow::Node nodeFrom, DataFlow::Node nodeTo
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where DataFlow::localFlowStep(nodeFrom, nodeTo)
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select nodeFrom, nodeTo
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