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Description
This is another issue we encountered when analysing databases created with build-mode=none.
It appears that dataflow graphs are broken when static fields are accessed on unknown classes.
Please take a look codeql_issue2.zip for more information.
Here is the example java code:
// This import is from a dependency that is not resolved
import com.foo.mycompany.UnknownClass;
public class DataFlowNotConnected {
static class MyClass {
public static String staticField = "static";
}
private int run() {
// data source 1 should flow to sink e and f, but dataflow is broken by UnknownClass.staticField
int a = 1;
int b = a;
// static class field access from known class
String staticField1 = MyClass.staticField;
int c = b;
int d = c;
// static class field access from unknown class breaks dataflow
String staticField2 = UnknownClass.staticField;
int e = d;
int f = e;
return f;
}
}