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Data flow: fix bad join in localFlowExit #17339

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Data flow: fix bad join in localFlowExit #17339

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5348b03
Data flow: Duplicate call to 'revFlow'
asgerf Aug 29, 2024
5a47dd1
Data flow: remove unused 'apNext'
asgerf Aug 29, 2024
60faa00
Data flow: unify apNext with ap as they're always equal in this clause
asgerf Aug 29, 2024
f3a6561
Data flow: add only_bind_out to 'next'
asgerf Aug 29, 2024
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20 changes: 11 additions & 9 deletions shared/dataflow/codeql/dataflow/internal/DataFlowImpl.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -2695,20 +2695,22 @@ module MakeImpl<LocationSig Location, InputSig<Location> Lang> {
private predicate localFlowExit(NodeEx node, FlowState state, Ap ap) {
revFlow(node, pragma[only_bind_into](state), pragma[only_bind_into](ap)) and
(
exists(NodeEx next, Ap apNext | revFlow(next, pragma[only_bind_into](state), apNext) |
jumpStepEx(node, next) and
apNext = ap
exists(NodeEx next |
revFlow(pragma[only_bind_out](next), pragma[only_bind_into](state), ap)
|
jumpStepEx(node, next)
or
additionalJumpStep(node, next, _) and
apNext = ap and
ap instanceof ApNil
or
callEdgeArgParam(_, _, node, next, _, ap) and
apNext = ap
or
callEdgeReturn(_, _, node, _, next, _, ap) and
apNext = ap
callEdgeArgParam(_, _, node, next, _, ap)
or
callEdgeReturn(_, _, node, _, next, _, ap)
)
or
exists(NodeEx next |
revFlow(pragma[only_bind_out](next), pragma[only_bind_into](state), _)
|
storeStepCand(node, _, _, next, _, _)
or
readStepCand(node, _, next)
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