Add STATIC_BASE_TYPE property to calls

Author: johannescoetzee

schema/src/main/scala/io/shiftleft/codepropertygraph/schema/CallGraph.scala

@@ -176,8 +176,22 @@ object CallGraph extends SchemaBase {
       ).protoId(ProtoIds.Inlined)
     )
 
+    val staticBaseType = builder
+      .addProperty(
+        name = "STATIC_BASE_TYPE",
+        valueType = ValueType.String,
+        comment = """The `STATIC_BASE_TYPE` field is used to keep track of the type on which a static method
+            |is called for static methods which may be inherited. This information can then be used to find
+            |the true `METHOD_FULL_NAME` of the method being called during call linking. For example, if a
+            |class `Foo` defines a static method `foo` and a class `Bar extends Foo`, then the `STATIC_BASE_TYPE`
+            |of a`Bar.foo()` call is `Bar` and the `METHOD_FULL_NAME` of the `foo` call is rewritten to
+            |`Foo.foo:<signature>`.
+            |""".stripMargin
+      )
+      .protoId(ProtoIds.StaticBaseType)
+
     callNode
-      .addProperties(dispatchType)
+      .addProperties(dispatchType, staticBaseType)
 
     callNode
       .addOutEdge(edge = call, inNode = method)

schema/src/main/scala/io/shiftleft/codepropertygraph/schema/ProtoIds.scala

@@ -124,6 +124,7 @@ object ProtoIds {
   val AstParentType             = 56
   val AstParentFullName         = 57
   val DependencyGroupId         = 58
+  val StaticBaseType            = 59
   val Symbol                    = 100
   val MethodShortName           = 102
   val PackageName               = 103