[PATCH] D75603: [clangd] Add instrumentation mode in clangd for metrics collection.

[UTKARSH SAXENA via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGe397a0a5c3c0: [clangd] Add instrumentation mode in clangd for metrics collection. (authored by usaxena95).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D75603/new/

https://reviews.llvm.org/D75603

Files:
  clang-tools-extra/clangd/CodeComplete.cpp
  clang-tools-extra/clangd/CodeComplete.h
  clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp


Index: clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
+++ clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
@@ -29,7 +29,9 @@
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include <condition_variable>
+#include <functional>
 #include <mutex>
+#include <vector>
 
 namespace clang {
 namespace clangd {
@@ -1041,6 +1043,21 @@
   EXPECT_THAT(Completions, Contains(Named("TT")));
 }
 
+TEST(CompletionTest, RecordCCResultCallback) {
+  std::vector<CodeCompletion> RecordedCompletions;
+  CodeCompleteOptions Opts;
+  Opts.RecordCCResult = [&RecordedCompletions](const CodeCompletion &CC,
+                                               const SymbolQualitySignals &,
+                                               const SymbolRelevanceSignals &,
+                                               float Score) {
+    RecordedCompletions.push_back(CC);
+  };
+
+  completions("int xy1, xy2; int a = xy^", /*IndexSymbols=*/{}, Opts);
+  EXPECT_THAT(RecordedCompletions,
+              UnorderedElementsAre(Named("xy1"), Named("xy2")));
+}
+
 SignatureHelp signatures(llvm::StringRef Text, Position Point,
                          std::vector<Symbol> IndexSymbols = {}) {
   std::unique_ptr<SymbolIndex> Index;
Index: clang-tools-extra/clangd/CodeComplete.h
===================================================================
--- clang-tools-extra/clangd/CodeComplete.h
+++ clang-tools-extra/clangd/CodeComplete.h
@@ -19,6 +19,7 @@
 #include "Logger.h"
 #include "Path.h"
 #include "Protocol.h"
+#include "Quality.h"
 #include "index/Index.h"
 #include "index/Symbol.h"
 #include "index/SymbolOrigin.h"
@@ -29,12 +30,14 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Error.h"
+#include <functional>
 #include <future>
 
 namespace clang {
 class NamedDecl;
 namespace clangd {
 struct PreambleData;
+struct CodeCompletion;
 
 struct CodeCompleteOptions {
   /// Returns options that can be passed to clang's completion engine.
@@ -129,6 +132,16 @@
     /// Always use text-based completion.
     NeverParse,
   } RunParser = ParseIfReady;
+
+  /// Callback invoked on all CompletionCandidate after they are scored and
+  /// before they are ranked (by -Score). Thus the results are yielded in
+  /// arbitrary order.
+  ///
+  /// This callbacks allows capturing various internal structures used by clangd
+  /// during code completion. Eg: Symbol quality and relevance signals.
+  std::function<void(const CodeCompletion &, const SymbolQualitySignals &,
+                     const SymbolRelevanceSignals &, float Score)>
+      RecordCCResult;
 };
 
 // Semi-structured representation of a code-complete suggestion for our C++ API.
Index: clang-tools-extra/clangd/CodeComplete.cpp
===================================================================
--- clang-tools-extra/clangd/CodeComplete.cpp
+++ clang-tools-extra/clangd/CodeComplete.cpp
@@ -1660,6 +1660,10 @@
                                ? Scores.Total / Relevance.NameMatch
                                : Scores.Quality;
 
+    if (Opts.RecordCCResult)
+      Opts.RecordCCResult(toCodeCompletion(Bundle), Quality, Relevance,
+                          Scores.Total);
+
     dlog("CodeComplete: {0} ({1}) = {2}\n{3}{4}\n", First.Name,
          llvm::to_string(Origin), Scores.Total, llvm::to_string(Quality),
          llvm::to_string(Relevance));


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