Merge pull request github#2016 from asger-semmle/jquery

Add type tracking and type info to jQuery model

Author: Esben Sparre Andreasen

javascript/ql/src/semmle/javascript/Extend.qll

@@ -47,7 +47,9 @@ private class ExtendCallWithFlag extends ExtendCall {
       name = "node.extend"
     )
     or
-    this = jquery().getAPropertyRead("extend").getACall()
+    // Match $.extend using the source of `$` only, as ExtendCall should not
+    // depend on type tracking.
+    this = JQuery::dollarSource().getAMemberCall("extend")
   }
 
   /**

javascript/ql/src/semmle/javascript/JSDoc.qll

@@ -336,6 +336,7 @@ class JSDocNamedTypeExpr extends @jsdoc_named_type_expr, JSDocTypeExpr {
   /**
    * Gets the qualified name of this name by resolving its prefix, if any.
    */
+  cached
   private string resolvedName() {
     exists(string prefix, string suffix, JSDoc::Environment env |
       hasNamePartsAndEnv(prefix, suffix, env) and

javascript/ql/src/semmle/javascript/frameworks/AngularJS/AngularJSCore.qll

@@ -631,11 +631,11 @@ private class RouteParamSource extends RemoteFlowSource {
  * AngularJS expose a jQuery-like interface through `angular.html(..)`.
  * The interface may be backed by an actual jQuery implementation.
  */
-private class JQLiteObject extends JQueryObject {
+private class JQLiteObject extends JQuery::ObjectSource::Range {
   JQLiteObject() {
-    this = angular().getAMemberCall("element").asExpr()
+    this = angular().getAMemberCall("element")
     or
-    exists(SimpleParameter param |
+    exists(Parameter param | this = DataFlow::parameterNode(param) |
       // element parameters to user-functions invoked by AngularJS
       param = any(LinkFunction link).getElementParameter()
       or
@@ -652,15 +652,13 @@ private class JQLiteObject extends JQueryObject {
           param = f.getAstNode().(Function).getParameter(i)
         )
       )
-    |
-      this = param.getAnInitialUse()
     )
     or
     exists(ServiceReference element |
       element.getName() = "$rootElement" or
       element.getName() = "$document"
     |
-      this = element.getAnAccess()
+      this = element.getAReference()
     )
   }
 }

javascript/ql/src/semmle/javascript/frameworks/AngularJS/ServiceDefinitions.qll

@@ -34,6 +34,13 @@ abstract class ServiceReference extends TServiceReference {
    */
   abstract string getName();
 
+  /**
+   * Gets a data flow node that may refer to this service.
+   */
+  DataFlow::SourceNode getAReference() {
+    result = DataFlow::parameterNode(any(ServiceRequest request).getDependencyParameter(this))
+  }
+
   /**
    * Gets an access to the referenced service.
    */