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Merge pull request #9024 from hvitved/dataflow/content-flow-lib

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Data flow: Introduce `ContentDataFlow.qll`
This commit is contained in:
Tom Hvitved
2022-05-24 15:09:16 +02:00
committed by GitHub
parent d61f6453d0 6345816acf
commit 728ccafe2b
12 changed files with 6135 additions and 91 deletions
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37
python/ql/lib/semmle/python/dataflow/new/internal/DataFlowImplCommon.qll
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@@ -788,24 +788,31 @@ private module Cached {
cached
predicate readSet(Node node1, ContentSet c, Node node2) { readStep(node1, c, node2) }
cached
predicate storeSet(
Node node1, ContentSet c, Node node2, DataFlowType contentType, DataFlowType containerType
) {
storeStep(node1, c, node2) and
contentType = getNodeDataFlowType(node1) and
containerType = getNodeDataFlowType(node2)
or
exists(Node n1, Node n2 |
n1 = node1.(PostUpdateNode).getPreUpdateNode() and
n2 = node2.(PostUpdateNode).getPreUpdateNode()
|
argumentValueFlowsThrough(n2, TReadStepTypesSome(containerType, c, contentType), n1)
or
readSet(n2, c, n1) and
contentType = getNodeDataFlowType(n1) and
containerType = getNodeDataFlowType(n2)
)
}
private predicate store(
Node node1, Content c, Node node2, DataFlowType contentType, DataFlowType containerType
) {
exists(ContentSet cs | c = cs.getAStoreContent() |
storeStep(node1, cs, node2) and
contentType = getNodeDataFlowType(node1) and
containerType = getNodeDataFlowType(node2)
or
exists(Node n1, Node n2 |
n1 = node1.(PostUpdateNode).getPreUpdateNode() and
n2 = node2.(PostUpdateNode).getPreUpdateNode()
|
argumentValueFlowsThrough(n2, TReadStepTypesSome(containerType, cs, contentType), n1)
or
readSet(n2, cs, n1) and
contentType = getNodeDataFlowType(n1) and
containerType = getNodeDataFlowType(n2)
)
exists(ContentSet cs |
c = cs.getAStoreContent() and storeSet(node1, cs, node2, contentType, containerType)
)
}