Merge upstream release/8.x branch

clang-tools-extra/clang-tidy/ClangTidy.cpp

@@ -529,24 +529,8 @@ runClangTidy(clang::tidy::ClangTidyContext &Context,
         return AdjustedArgs;
       };
 
-  // Remove plugins arguments.
-  ArgumentsAdjuster PluginArgumentsRemover =
-      [](const CommandLineArguments &Args, StringRef Filename) {
-        CommandLineArguments AdjustedArgs;
-        for (size_t I = 0, E = Args.size(); I < E; ++I) {
-          if (I + 4 < Args.size() && Args[I] == "-Xclang" &&
-              (Args[I + 1] == "-load" || Args[I + 1] == "-add-plugin" ||
-               StringRef(Args[I + 1]).startswith("-plugin-arg-")) &&
-              Args[I + 2] == "-Xclang") {
-            I += 3;
-          } else
-            AdjustedArgs.push_back(Args[I]);
-        }
-        return AdjustedArgs;
-      };
-
   Tool.appendArgumentsAdjuster(PerFileExtraArgumentsInserter);
-  Tool.appendArgumentsAdjuster(PluginArgumentsRemover);
+  Tool.appendArgumentsAdjuster(getStripPluginsAdjuster());
   Context.setEnableProfiling(EnableCheckProfile);
   Context.setProfileStoragePrefix(StoreCheckProfile);
 

clang-tools-extra/clang-tidy/misc/NonPrivateMemberVariablesInClassesCheck.cpp

@@ -23,8 +23,8 @@ AST_MATCHER(CXXRecordDecl, hasMethods) {
   return std::distance(Node.method_begin(), Node.method_end()) != 0;
 }
 
-AST_MATCHER(CXXRecordDecl, hasNonStaticMethod) {
-  return hasMethod(unless(isStaticStorageClass()))
+AST_MATCHER(CXXRecordDecl, hasNonStaticNonImplicitMethod) {
+  return hasMethod(unless(anyOf(isStaticStorageClass(), isImplicit())))
       .matches(Node, Finder, Builder);
 }
 
@@ -67,10 +67,11 @@ void NonPrivateMemberVariablesInClassesCheck::registerMatchers(
       IgnorePublicMemberVariables ? isProtected() : unless(isPrivate()));
 
   // We only want the records that not only contain the mutable data (non-static
-  // member variables), but also have some logic (non-static member functions).
-  // We may optionally ignore records where all the member variables are public.
+  // member variables), but also have some logic (non-static, non-implicit
+  // member functions).  We may optionally ignore records where all the member
+  // variables are public.
   Finder->addMatcher(cxxRecordDecl(anyOf(isStruct(), isClass()), hasMethods(),
-                                   hasNonStaticMethod(),
+                                   hasNonStaticNonImplicitMethod(),
                                    unless(ShouldIgnoreRecord),
                                    forEach(InterestingField.bind("field")))
                          .bind("record"),

clang-tools-extra/clang-tidy/modernize/AvoidCArraysCheck.cpp

@@ -31,6 +31,12 @@ AST_MATCHER(clang::RecordDecl, isExternCContext) {
   return Node.isExternCContext();
 }
 
+AST_MATCHER(clang::ParmVarDecl, isArgvOfMain) {
+  const clang::DeclContext *DC = Node.getDeclContext();
+  const auto *FD = llvm::dyn_cast<clang::FunctionDecl>(DC);
+  return FD ? FD->isMain() : false;
+}
+
 } // namespace
 
 namespace clang {
@@ -44,7 +50,8 @@ void AvoidCArraysCheck::registerMatchers(MatchFinder *Finder) {
 
   Finder->addMatcher(
       typeLoc(hasValidBeginLoc(), hasType(arrayType()),
-              unless(anyOf(hasParent(varDecl(isExternC())),
+              unless(anyOf(hasParent(parmVarDecl(isArgvOfMain())),
+                           hasParent(varDecl(isExternC())),
                            hasParent(fieldDecl(
                                hasParent(recordDecl(isExternCContext())))),
                            hasAncestor(functionDecl(isExternC())))))

clang-tools-extra/clangd/ClangdLSPServer.cpp

@@ -290,7 +290,8 @@ void ClangdLSPServer::onInitialize(const InitializeParams &Params,
   if (UseDirBasedCDB)
     BaseCDB = llvm::make_unique<DirectoryBasedGlobalCompilationDatabase>(
         CompileCommandsDir);
-  CDB.emplace(BaseCDB.get(), Params.initializationOptions.fallbackFlags);
+  CDB.emplace(BaseCDB.get(), Params.initializationOptions.fallbackFlags,
+              ClangdServerOpts.ResourceDir);
   Server.emplace(*CDB, FSProvider, static_cast<DiagnosticsConsumer &>(*this),
                  ClangdServerOpts);
   applyConfiguration(Params.initializationOptions.ConfigSettings);

clang-tools-extra/clangd/ClangdServer.cpp

@@ -38,11 +38,6 @@ namespace clang {
 namespace clangd {
 namespace {
 
-std::string getStandardResourceDir() {
-  static int Dummy; // Just an address in this process.
-  return CompilerInvocation::GetResourcesPath("clangd", (void *)&Dummy);
-}
-
 class RefactoringResultCollector final
     : public tooling::RefactoringResultConsumer {
 public:
@@ -108,8 +103,6 @@ ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
                            DiagnosticsConsumer &DiagConsumer,
                            const Options &Opts)
     : CDB(CDB), FSProvider(FSProvider),
-      ResourceDir(Opts.ResourceDir ? *Opts.ResourceDir
-                                   : getStandardResourceDir()),
       DynamicIdx(Opts.BuildDynamicSymbolIndex
                      ? new FileIndex(Opts.HeavyweightDynamicSymbolIndex)
                      : nullptr),
@@ -137,7 +130,7 @@ ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
     AddIndex(Opts.StaticIndex);
   if (Opts.BackgroundIndex) {
     BackgroundIdx = llvm::make_unique<BackgroundIndex>(
-        Context::current().clone(), ResourceDir, FSProvider, CDB,
+        Context::current().clone(), FSProvider, CDB,
         BackgroundIndexStorage::createDiskBackedStorageFactory(),
         Opts.BackgroundIndexRebuildPeriodMs);
     AddIndex(BackgroundIdx.get());
@@ -462,10 +455,6 @@ tooling::CompileCommand ClangdServer::getCompileCommand(PathRef File) {
   llvm::Optional<tooling::CompileCommand> C = CDB.getCompileCommand(File);
   if (!C) // FIXME: Suppress diagnostics? Let the user know?
     C = CDB.getFallbackCommand(File);
-
-  // Inject the resource dir.
-  // FIXME: Don't overwrite it if it's already there.
-  C->CommandLine.push_back("-resource-dir=" + ResourceDir);
   return std::move(*C);
 }
 

clang-tools-extra/clangd/ExpectedTypes.cpp

@@ -35,8 +35,10 @@ static llvm::Optional<QualType>
 typeOfCompletion(const CodeCompletionResult &R) {
   auto *VD = dyn_cast_or_null<ValueDecl>(R.Declaration);
   if (!VD)
-    return None; // We handle only variables and functions below.
+    return llvm::None; // We handle only variables and functions below.
   auto T = VD->getType();
+  if (T.isNull())
+    return llvm::None;
   if (auto FuncT = T->getAs<FunctionType>()) {
     // Functions are a special case. They are completed as 'foo()' and we want
     // to match their return type rather than the function type itself.

clang-tools-extra/clangd/GlobalCompilationDatabase.cpp

@@ -9,12 +9,36 @@
 
 #include "GlobalCompilationDatabase.h"
 #include "Logger.h"
+#include "clang/Frontend/CompilerInvocation.h"
+#include "clang/Tooling/ArgumentsAdjusters.h"
 #include "clang/Tooling/CompilationDatabase.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 
 namespace clang {
 namespace clangd {
+namespace {
+
+void adjustArguments(tooling::CompileCommand &Cmd,
+                     llvm::StringRef ResourceDir) {
+  // Strip plugin related command line arguments. Clangd does
+  // not support plugins currently. Therefore it breaks if
+  // compiler tries to load plugins.
+  Cmd.CommandLine =
+      tooling::getStripPluginsAdjuster()(Cmd.CommandLine, Cmd.Filename);
+  // Inject the resource dir.
+  // FIXME: Don't overwrite it if it's already there.
+  if (!ResourceDir.empty())
+    Cmd.CommandLine.push_back(("-resource-dir=" + ResourceDir).str());
+}
+
+std::string getStandardResourceDir() {
+  static int Dummy; // Just an address in this process.
+  return CompilerInvocation::GetResourcesPath("clangd", (void *)&Dummy);
+}
+
+} // namespace
 
 static std::string getFallbackClangPath() {
   static int Dummy;
@@ -106,8 +130,11 @@ DirectoryBasedGlobalCompilationDatabase::getCDBForFile(
 }
 
 OverlayCDB::OverlayCDB(const GlobalCompilationDatabase *Base,
-                       std::vector<std::string> FallbackFlags)
-    : Base(Base), FallbackFlags(std::move(FallbackFlags)) {
+                       std::vector<std::string> FallbackFlags,
+                       llvm::Optional<std::string> ResourceDir)
+    : Base(Base), ResourceDir(ResourceDir ? std::move(*ResourceDir)
+                                          : getStandardResourceDir()),
+      FallbackFlags(std::move(FallbackFlags)) {
   if (Base)
     BaseChanged = Base->watch([this](const std::vector<std::string> Changes) {
       OnCommandChanged.broadcast(Changes);
@@ -116,16 +143,22 @@ OverlayCDB::OverlayCDB(const GlobalCompilationDatabase *Base,
 
 llvm::Optional<tooling::CompileCommand>
 OverlayCDB::getCompileCommand(PathRef File, ProjectInfo *Project) const {
+  llvm::Optional<tooling::CompileCommand> Cmd;
   {
     std::lock_guard<std::mutex> Lock(Mutex);
     auto It = Commands.find(File);
     if (It != Commands.end()) {
       if (Project)
         Project->SourceRoot = "";
-      return It->second;
+      Cmd = It->second;
     }
   }
-  return Base ? Base->getCompileCommand(File, Project) : None;
+  if (!Cmd && Base)
+    Cmd = Base->getCompileCommand(File, Project);
+  if (!Cmd)
+    return llvm::None;
+  adjustArguments(*Cmd, ResourceDir);
+  return Cmd;
 }
 
 tooling::CompileCommand OverlayCDB::getFallbackCommand(PathRef File) const {

clang-tools-extra/clangd/GlobalCompilationDatabase.h

@@ -12,6 +12,7 @@
 
 #include "Function.h"
 #include "Path.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/StringMap.h"
 #include <memory>
 #include <mutex>
@@ -98,7 +99,8 @@ class OverlayCDB : public GlobalCompilationDatabase {
   // Base may be null, in which case no entries are inherited.
   // FallbackFlags are added to the fallback compile command.
   OverlayCDB(const GlobalCompilationDatabase *Base,
-             std::vector<std::string> FallbackFlags = {});
+             std::vector<std::string> FallbackFlags = {},
+             llvm::Optional<std::string> ResourceDir = llvm::None);
 
   llvm::Optional<tooling::CompileCommand>
   getCompileCommand(PathRef File, ProjectInfo * = nullptr) const override;
@@ -113,6 +115,7 @@ class OverlayCDB : public GlobalCompilationDatabase {
   mutable std::mutex Mutex;
   llvm::StringMap<tooling::CompileCommand> Commands; /* GUARDED_BY(Mut) */
   const GlobalCompilationDatabase *Base;
+  std::string ResourceDir;
   std::vector<std::string> FallbackFlags;
   CommandChanged::Subscription BaseChanged;
 };

clang-tools-extra/clangd/index/Background.cpp

@@ -127,13 +127,12 @@ llvm::SmallString<128> getAbsolutePath(const tooling::CompileCommand &Cmd) {
 } // namespace
 
 BackgroundIndex::BackgroundIndex(
-    Context BackgroundContext, llvm::StringRef ResourceDir,
-    const FileSystemProvider &FSProvider, const GlobalCompilationDatabase &CDB,
+    Context BackgroundContext, const FileSystemProvider &FSProvider,
+    const GlobalCompilationDatabase &CDB,
     BackgroundIndexStorage::Factory IndexStorageFactory,
     size_t BuildIndexPeriodMs, size_t ThreadPoolSize)
-    : SwapIndex(llvm::make_unique<MemIndex>()), ResourceDir(ResourceDir),
-      FSProvider(FSProvider), CDB(CDB),
-      BackgroundContext(std::move(BackgroundContext)),
+    : SwapIndex(llvm::make_unique<MemIndex>()), FSProvider(FSProvider),
+      CDB(CDB), BackgroundContext(std::move(BackgroundContext)),
       BuildIndexPeriodMs(BuildIndexPeriodMs),
       SymbolsUpdatedSinceLastIndex(false),
       IndexStorageFactory(std::move(IndexStorageFactory)),
@@ -230,7 +229,6 @@ void BackgroundIndex::enqueue(tooling::CompileCommand Cmd,
                               BackgroundIndexStorage *Storage) {
   enqueueTask(Bind(
                   [this, Storage](tooling::CompileCommand Cmd) {
-                    Cmd.CommandLine.push_back("-resource-dir=" + ResourceDir);
                     // We can't use llvm::StringRef here since we are going to
                     // move from Cmd during the call below.
                     const std::string FileName = Cmd.Filename;

clang-tools-extra/clangd/index/Background.h

@@ -68,9 +68,7 @@ class BackgroundIndex : public SwapIndex {
   /// If BuildIndexPeriodMs is greater than 0, the symbol index will only be
   /// rebuilt periodically (one per \p BuildIndexPeriodMs); otherwise, index is
   /// rebuilt for each indexed file.
-  // FIXME: resource-dir injection should be hoisted somewhere common.
-  BackgroundIndex(Context BackgroundContext, llvm::StringRef ResourceDir,
-                  const FileSystemProvider &,
+  BackgroundIndex(Context BackgroundContext, const FileSystemProvider &,
                   const GlobalCompilationDatabase &CDB,
                   BackgroundIndexStorage::Factory IndexStorageFactory,
                   size_t BuildIndexPeriodMs = 0,
@@ -99,7 +97,6 @@ class BackgroundIndex : public SwapIndex {
               BackgroundIndexStorage *IndexStorage);
 
   // configuration
-  std::string ResourceDir;
   const FileSystemProvider &FSProvider;
   const GlobalCompilationDatabase &CDB;
   Context BackgroundContext;