Merge pull request #15887 from michaelnebel/csharp/qualifiedname

C#: Fully qualified name.

Author: michaelnebel

csharp/ql/integration-tests/all-platforms/diag_recursive_generics/Types.ql

@@ -2,4 +2,4 @@ import csharp
 
 from Class c
 where c.fromSource()
-select c, c.getBaseClass().getFullyQualifiedName()
+select c, c.getBaseClass().getFullyQualifiedNameDebug()

csharp/ql/lib/semmle/code/csharp/Element.qll

@@ -102,6 +102,8 @@ class NamedElement extends Element, @named_element {
   final predicate hasName(string name) { name = this.getName() }
 
   /**
+   * DEPRECATED: Use `hasFullyQualifiedName` instead.
+   *
    * Gets the fully qualified name of this element, for example the
    * fully qualified name of `M` on line 3 is `N.C.M` in
    *
@@ -112,15 +114,23 @@ class NamedElement extends Element, @named_element {
    *   }
    * }
    * ```
+   *
+   * Unbound generic types, such as `IList<T>`, are represented as
+   * ``System.Collections.Generic.IList`1``.
    */
-  cached
-  deprecated final string getQualifiedName() {
-    exists(string qualifier, string name | this.hasQualifiedName(qualifier, name) |
+  deprecated final string getFullyQualifiedName() {
+    exists(string qualifier, string name | this.hasFullyQualifiedName(qualifier, name) |
       if qualifier = "" then result = name else result = qualifier + "." + name
     )
   }
 
   /**
+   * INTERNAL: Do not use.
+   *
+   * This is intended for DEBUG ONLY.
+   * Constructing the fully qualified name for all elements in a large codebase
+   * puts severe stress on the string pool.
+   *
    * Gets the fully qualified name of this element, for example the
    * fully qualified name of `M` on line 3 is `N.C.M` in
    *
@@ -135,23 +145,14 @@ class NamedElement extends Element, @named_element {
    * Unbound generic types, such as `IList<T>`, are represented as
    * ``System.Collections.Generic.IList`1``.
    */
-  cached
-  final string getFullyQualifiedName() {
+  bindingset[this]
+  pragma[inline_late]
+  final string getFullyQualifiedNameDebug() {
     exists(string qualifier, string name | this.hasFullyQualifiedName(qualifier, name) |
       if qualifier = "" then result = name else result = qualifier + "." + name
     )
   }
 
-  /**
-   * DEPRECATED: Use `hasFullyQualifiedName` instead.
-   *
-   * Holds if this element has the qualified name `qualifier`.`name`.
-   */
-  cached
-  deprecated predicate hasQualifiedName(string qualifier, string name) {
-    qualifier = "" and name = this.getName()
-  }
-
   /** Holds if this element has the fully qualified name `qualifier`.`name`. */
   cached
   predicate hasFullyQualifiedName(string qualifier, string name) {

csharp/ql/lib/semmle/code/csharp/Member.qll

@@ -71,17 +71,11 @@ class Declaration extends NamedElement, @declaration {
 
   override string toString() { result = this.getName() }
 
-  deprecated override predicate hasQualifiedName(string qualifier, string name) {
-    QualifiedName<QualifiedNameInput>::hasQualifiedName(this, qualifier, name)
-  }
-
   override predicate hasFullyQualifiedName(string qualifier, string name) {
     QualifiedName<FullyQualifiedNameInput>::hasQualifiedName(this, qualifier, name)
   }
 
   /**
-   * DEPRECATED: Use `getFullyQualifiedNameWithTypes` instead.
-   *
    * Gets the fully qualified name of this declaration, including types, for example
    * the fully qualified name with types of `M` on line 3 is `N.C.M(int, string)` in
    *
@@ -93,33 +87,13 @@ class Declaration extends NamedElement, @declaration {
    * }
    * ```
    */
-  deprecated string getQualifiedNameWithTypes() {
-    exists(string qual |
-      qual = this.getDeclaringType().getQualifiedName() and
+  deprecated string getFullyQualifiedNameWithTypes() {
+    exists(string fullqual, string qual, string name |
+      this.getDeclaringType().hasFullyQualifiedName(qual, name) and
+      fullqual = getQualifiedName(qual, name) and
       if this instanceof NestedType
-      then result = qual + "+" + this.toStringWithTypes()
-      else result = qual + "." + this.toStringWithTypes()
-    )
-  }
-
-  /**
-   * Gets the fully qualified name of this declaration, including types, for example
-   * the fully qualified name with types of `M` on line 3 is `N.C.M(int, string)` in
-   *
-   * ```csharp
-   * namespace N {
-   *   class C {
-   *     void M(int i, string s) { }
-   *   }
-   * }
-   * ```
-   */
-  string getFullyQualifiedNameWithTypes() {
-    exists(string qual |
-      qual = this.getDeclaringType().getFullyQualifiedName() and
-      if this instanceof NestedType
-      then result = qual + "+" + this.toStringWithTypes()
-      else result = qual + "." + this.toStringWithTypes()
+      then result = fullqual + "+" + this.toStringWithTypes()
+      else result = fullqual + "." + this.toStringWithTypes()
     )
   }
 
@@ -263,17 +237,6 @@ class Member extends Modifiable, @member {
   /** Gets an access to this member. */
   MemberAccess getAnAccess() { result.getTarget() = this }
 
-  /**
-   * DEPRECATED: Use `hasFullyQualifiedName` instead.
-   *
-   * Holds if this member has name `name` and is defined in type `type`
-   * with namespace `namespace`.
-   */
-  cached
-  deprecated final predicate hasQualifiedName(string namespace, string type, string name) {
-    QualifiedName<QualifiedNameInput>::hasQualifiedName(this, namespace, type, name)
-  }
-
   /**
    * Holds if this member has name `name` and is defined in type `type`
    * with namespace `namespace`.

csharp/ql/lib/semmle/code/csharp/Namespace.qll

@@ -38,16 +38,6 @@ class Namespace extends TypeContainer, Declaration, @namespace {
     parent_namespace(result, this)
   }
 
-  /**
-   * Holds if this namespace has the qualified name `qualifier`.`name`.
-   *
-   * For example if the qualified name is `System.Collections.Generic`, then
-   * `qualifier`=`System.Collections` and `name`=`Generic`.
-   */
-  deprecated override predicate hasQualifiedName(string qualifier, string name) {
-    namespaceHasQualifiedName(this, qualifier, name)
-  }
-
   /**
    * Holds if this namespace has the qualified name `qualifier`.`name`.
    *

csharp/ql/lib/semmle/code/csharp/commons/QualifiedName.qll

@@ -219,3 +219,28 @@ predicate splitQualifiedName(string qualifiedName, string qualifier, string name
     name = qualifiedName
   )
 }
+
+/**
+ * INTERNAL: Do not use.
+ *
+ * Gets the fully qualified name of this declaration, including types, for example
+ * the fully qualified name with types of `M` on line 3 is `N.C.M(int, string)` in
+ *
+ * ```csharp
+ * namespace N {
+ *   class C {
+ *     void M(int i, string s) { }
+ *   }
+ * }
+ * ```
+ */
+bindingset[d]
+string getFullyQualifiedNameWithTypes(Declaration d) {
+  exists(string fullqual, string qual, string name |
+    d.getDeclaringType().hasFullyQualifiedName(qual, name) and
+    fullqual = getQualifiedName(qual, name) and
+    if d instanceof NestedType
+    then result = fullqual + "+" + d.toStringWithTypes()
+    else result = fullqual + "." + d.toStringWithTypes()
+  )
+}

csharp/ql/lib/semmle/code/csharp/dataflow/SSA.qll

@@ -120,7 +120,7 @@ module Ssa {
           result = prefix + "." + this.getAssignable()
         |
           if f.(Modifiable).isStatic()
-          then prefix = f.getDeclaringType().getFullyQualifiedName()
+          then prefix = f.getDeclaringType().getName()
           else prefix = "this"
         )
       }

csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll

@@ -3,6 +3,7 @@
  */
 
 private import csharp
+private import semmle.code.csharp.commons.QualifiedName
 private import semmle.code.csharp.frameworks.system.linq.Expressions
 private import codeql.dataflow.internal.FlowSummaryImpl
 private import codeql.dataflow.internal.AccessPathSyntax as AccessPath
@@ -42,10 +43,18 @@ module Input implements InputSig<Location, DataFlowImplSpecific::CsharpDataFlow>
   string encodeContent(ContentSet c, string arg) {
     c = TElementContent() and result = "Element" and arg = ""
     or
-    exists(Field f | c = TFieldContent(f) and result = "Field" and arg = f.getFullyQualifiedName())
+    exists(Field f, string qualifier, string name |
+      c = TFieldContent(f) and
+      f.hasFullyQualifiedName(qualifier, name) and
+      arg = getQualifiedName(qualifier, name) and
+      result = "Field"
+    )
     or
-    exists(Property p |
-      c = TPropertyContent(p) and result = "Property" and arg = p.getFullyQualifiedName()
+    exists(Property p, string qualifier, string name |
+      c = TPropertyContent(p) and
+      p.hasFullyQualifiedName(qualifier, name) and
+      arg = getQualifiedName(qualifier, name) and
+      result = "Property"
     )
     or
     exists(SyntheticField f |

csharp/ql/lib/semmle/code/csharp/security/dataflow/ExternalAPIsQuery.qll

@@ -139,13 +139,13 @@ class ExternalApiUsedWithUntrustedData extends TExternalApi {
 
   /** Gets a textual representation of this element. */
   string toString() {
-    exists(Callable m, int index, string indexString |
+    exists(Callable m, int index, string indexString, string qualifier, string name |
       if index = -1 then indexString = "qualifier" else indexString = "param " + index
     |
       this = TExternalApiParameter(m, index) and
+      m.getDeclaringType().hasFullyQualifiedName(qualifier, name) and
       result =
-        m.getDeclaringType().getFullyQualifiedName() + "." + m.toStringWithTypes() + " [" +
-          indexString + "]"
+        getQualifiedName(qualifier, name) + "." + m.toStringWithTypes() + " [" + indexString + "]"
     )
   }
 }

csharp/ql/test/library-tests/attributes/AttributeElements.ql

@@ -1,9 +1,7 @@
 import csharp
-import semmle.code.csharp.commons.QualifiedName
 
-from Attributable element, Attribute attribute, string qualifier, string name
+from Attributable element, Attribute attribute
 where
   attribute = element.getAnAttribute() and
-  (attribute.fromSource() or element.(Assembly).getName() in ["attributes", "Assembly1"]) and
-  attribute.getType().hasFullyQualifiedName(qualifier, name)
-select element, attribute, getQualifiedName(qualifier, name)
+  (attribute.fromSource() or element.(Assembly).getName() in ["attributes", "Assembly1"])
+select element, attribute, attribute.getType().getFullyQualifiedNameDebug()

csharp/ql/test/library-tests/constructors/Destructors1.ql

@@ -3,11 +3,10 @@
  */
 
 import csharp
-import semmle.code.csharp.commons.QualifiedName
 
 from Destructor c, string qualifier, string name
 where
   c.getDeclaringType().hasFullyQualifiedName(qualifier, name) and
   qualifier = "Constructors" and
   name = "Class"
-select c, c.getDeclaringType().getFullyQualifiedName()
+select c, c.getDeclaringType().getFullyQualifiedNameDebug()