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Tom Hvitved
2022-09-16 13:47:03 +02:00
parent 59caa977d0
commit db8b6ac69a
7 changed files with 56 additions and 0 deletions
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8
python/ql/lib/semmle/python/dataflow/new/internal/DataFlowImplConsistency.qll
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@@ -32,6 +32,12 @@ module Consistency {
/** Holds if `n` should be excluded from the consistency test `reverseRead`. */
predicate reverseReadExclude(Node n) { none() }
/** Holds if `n` should be excluded from the consistency test `postHasUniquePre`. */
predicate postHasUniquePreExclude(PostUpdateNode n) { none() }
/** Holds if `n` should be excluded from the consistency test `uniquePostUpdate`. */
predicate uniquePostUpdateExclude(Node n) { none() }
}
private class RelevantNode extends Node {
@@ -166,6 +172,7 @@ module Consistency {
}
query predicate postHasUniquePre(PostUpdateNode n, string msg) {
not any(ConsistencyConfiguration conf).postHasUniquePreExclude(n) and
exists(int c |
c = count(n.getPreUpdateNode()) and
c != 1 and
@@ -174,6 +181,7 @@ module Consistency {
}
query predicate uniquePostUpdate(Node n, string msg) {
not any(ConsistencyConfiguration conf).uniquePostUpdateExclude(n) and
1 < strictcount(PostUpdateNode post | post.getPreUpdateNode() = n) and
msg = "Node has multiple PostUpdateNodes."
}