C#: Add a summary model for PathString.ToString.

Author: michaelnebel

csharp/ql/lib/ext/Microsoft.AspNetCore.Http.model.yml

@@ -0,0 +1,6 @@
+extensions:
+  - addsTo:
+      pack: codeql/csharp-all
+      extensible: summaryModel
+    data:
+      - ["Microsoft.AspNetCore.Http", "PathString", True, "ToString", "()", "", "Argument[this]", "ReturnValue", "taint", "manual"]

csharp/ql/test/library-tests/dataflow/library/FlowSummaries.expected

@@ -1258,6 +1258,7 @@ summary
 | Microsoft.AspNetCore.Http;HttpResponse;OnStarting;(System.Func<System.Threading.Tasks.Task>);Argument[0];Argument[0].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;IEndpointFilter;InvokeAsync;(Microsoft.AspNetCore.Http.EndpointFilterInvocationContext,Microsoft.AspNetCore.Http.EndpointFilterDelegate);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;IMiddleware;InvokeAsync;(Microsoft.AspNetCore.Http.HttpContext,Microsoft.AspNetCore.Http.RequestDelegate);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |
+| Microsoft.AspNetCore.Http;PathString;ToString;();Argument[this];ReturnValue;taint;manual |
 | Microsoft.AspNetCore.Http;ProblemDetailsOptions;set_CustomizeProblemDetails;(System.Action<Microsoft.AspNetCore.Http.ProblemDetailsContext>);Argument[0];Argument[0].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;QueryCollection+Enumerator;get_Current;();Argument[this];ReturnValue;taint;df-generated |
 | Microsoft.AspNetCore.Http;QueryCollection;GetEnumerator;();Argument[this].Element;ReturnValue.Property[System.Collections.Generic.IEnumerator`1.Current];value;manual |

csharp/ql/test/library-tests/dataflow/library/FlowSummariesFiltered.expected

@@ -415,6 +415,7 @@
 | Microsoft.AspNetCore.Http;HttpResponse;OnStarting;(System.Func<System.Threading.Tasks.Task>);Argument[0];Argument[0].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;IEndpointFilter;InvokeAsync;(Microsoft.AspNetCore.Http.EndpointFilterInvocationContext,Microsoft.AspNetCore.Http.EndpointFilterDelegate);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;IMiddleware;InvokeAsync;(Microsoft.AspNetCore.Http.HttpContext,Microsoft.AspNetCore.Http.RequestDelegate);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |
+| Microsoft.AspNetCore.Http;PathString;ToString;();Argument[this];ReturnValue;taint;manual |
 | Microsoft.AspNetCore.Http;ProblemDetailsOptions;set_CustomizeProblemDetails;(System.Action<Microsoft.AspNetCore.Http.ProblemDetailsContext>);Argument[0];Argument[0].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;RequestDelegate;BeginInvoke;(Microsoft.AspNetCore.Http.HttpContext,System.AsyncCallback,System.Object);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |
 | Microsoft.AspNetCore.Http;RequestDelegateFactory;Create;(System.Reflection.MethodInfo,System.Func<Microsoft.AspNetCore.Http.HttpContext,System.Object>,Microsoft.AspNetCore.Http.RequestDelegateFactoryOptions);Argument[1];Argument[1].Parameter[delegate-self];value;hq-generated |