C#: Remove false-positive reflection calls in dataflow #18269
Merged
+20
−2
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When debugging a data flow performance issue, I noticed that we may have incorrect flow out of calls using reflection.
The data flow library uses the
Dispatch.qll
library to resolve calls, and this library distinguishes between the static target and dynamic targets of calls; for reflection-based calls, any method with matching name and arity is considered a static target, and this is then refined based on type information when calculating dynamic call targets. This means that "static target" of reflection calls is overly broad, and should not be used in data flow.