resolve calls to all instantiations of a signature predicate

Author: erik-krogh

ql/ql/src/codeql_ql/ast/internal/Predicate.qll

@@ -70,10 +70,16 @@ private module Cached {
       definesPredicate(m, pc.getPredicateName(), pc.getNumberOfArguments(), p, public)
     )
     or
-    exists(Module mod, PredicateExpr sig |
-      mod.hasParameter(_, pc.getPredicateName(), sig) and
-      p = sig.getResolvedPredicate() and // <- this is a `signature predicate`, but that's fine.
-      sig.getArity() = pc.getNumberOfArguments() // TODO: resolve all instantiations?
+    exists(Module mod, PredicateExpr sig, int i |
+      mod.hasParameter(i, pc.getPredicateName(), sig) and
+      sig.getArity() = pc.getNumberOfArguments()
+    |
+      p = sig.getResolvedPredicate() // <- this is a `signature predicate`, but that's fine.
+      or
+      exists(ModuleExpr inst, SignatureExpr arg | inst.getResolvedModule().asModule() = mod |
+        arg = inst.getArgument(i) and
+        p = arg.asPredicate().getResolvedPredicate()
+      )
     )
   }
 

ql/ql/test/callgraph/callgraph.expected

@@ -22,6 +22,7 @@ getTarget
 | Overrides.qll:28:3:28:9 | MemberCall | Overrides.qll:6:3:6:29 | ClassPredicate bar |
 | Overrides.qll:29:3:29:10 | MemberCall | Overrides.qll:8:3:8:41 | ClassPredicate baz |
 | ParamModules.qll:5:28:5:41 | PredicateCall | ParamModules.qll:2:13:2:36 | ClasslessPredicate fooSig |
+| ParamModules.qll:5:28:5:41 | PredicateCall | ParamModules.qll:8:3:8:35 | ClasslessPredicate myFoo |
 | ParamModules.qll:10:26:10:49 | PredicateCall | ParamModules.qll:5:5:5:43 | ClasslessPredicate bar |
 | ParamModules.qll:26:27:26:53 | PredicateCall | ParamModules.qll:17:5:17:42 | ClasslessPredicate getAnEven |
 | ParamModules.qll:26:27:26:61 | MemberCall | ParamModules.qll:23:5:23:39 | ClassPredicate myFoo |