C#: Add internal extractor diagnostics query

Author: hvitved

csharp/ql/src/Metrics/internal/ExtractorDiagnostics.ql

@@ -0,0 +1,24 @@
+/**
+ * @name Extractor diagnostics
+ * @description This query is for internal use only and may change without notice.
+ * @kind table
+ * @id csharp/extractor-diagnostics
+ */
+
+import csharp
+
+bindingset[i]
+private float getCompilationTimeSum(int i) {
+  result = sum(float f | compilation_time(_, _, i, f) | f)
+}
+
+select getCompilationTimeSum(0) as sum_frontend_cpu_seconds,
+  getCompilationTimeSum(1) as sum_frontend_elapsed_seconds,
+  getCompilationTimeSum(4) as sum_frontend_user_seconds,
+  getCompilationTimeSum(2) as sum_extractor_cpu_seconds,
+  getCompilationTimeSum(3) as sum_extractor_elapsed_seconds,
+  getCompilationTimeSum(5) as sum_extractor_user_seconds,
+  sum(float f | compilation_finished(_, f, _) | f) as sum_total_cpu_seconds,
+  sum(float f | compilation_finished(_, _, f) | f) as sum_total_elapsed_seconds,
+  getCompilationTimeSum(6) as sum_peak_working_set_mb,
+  max(float f | compilation_time(_, _, 6, f) | f) as max_peak_working_set_mb