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JS: Propagate locally returned functions out of calls

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This commit is contained in:
Asger Feldthaus
2020-06-12 10:07:37 +01:00
parent 6531db3cca
commit 4c536dde20
2 changed files with 11 additions and 1 deletions
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11
javascript/ql/src/semmle/javascript/dataflow/internal/CallGraphs.qll
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@@ -61,6 +61,17 @@ module CallGraph {
function = cls.getConstructor() and
cls.getAClassReference(t.continue()).flowsTo(result)
)
or
imprecision = 0 and
exists(DataFlow::FunctionNode outer |
result = getAFunctionReference(outer, 0, t.continue()).getAnInvocation() and
locallyReturnedFunction(outer, function)
)
}
cached
private predicate locallyReturnedFunction(DataFlow::FunctionNode outer, DataFlow::FunctionNode inner) {
inner.flowsTo(outer.getAReturn())
}
/**

1
javascript/ql/test/library-tests/CallGraphs/AnnotatedTest/Test.expected
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@@ -2,5 +2,4 @@ spuriousCallee
missingCallee
| constructor-field.ts:40:5:40:14 | f3.build() | constructor-field.ts:13:3:13:12 | build() {} | -1 |
| constructor-field.ts:71:1:71:11 | bf3.build() | constructor-field.ts:13:3:13:12 | build() {} | -1 |
| returned-function.js:23:1:23:4 | r2() | returned-function.js:8:9:10:9 | functio ... } | -1 |
badAnnotation