Use Clang C++ for completion and diagnostics

src/clang_complete.cc

@@ -5,6 +5,8 @@
 #include "log.hh"
 #include "platform.h"
 
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
 #include <clang/Sema/CodeCompleteConsumer.h>
 #include <llvm/ADT/Twine.h>
 #include <llvm/Support/Threading.h>
@@ -16,25 +18,15 @@ using namespace llvm;
 
 namespace {
 
-unsigned Flags() {
-  // TODO: use clang_defaultEditingTranslationUnitOptions()?
-  return CXTranslationUnit_Incomplete | CXTranslationUnit_KeepGoing |
-         CXTranslationUnit_CacheCompletionResults |
-         CXTranslationUnit_PrecompiledPreamble |
-         CXTranslationUnit_IncludeBriefCommentsInCodeCompletion |
-         CXTranslationUnit_DetailedPreprocessingRecord |
-         CXTranslationUnit_CreatePreambleOnFirstParse;
-}
-
 std::string StripFileType(const std::string& path) {
   SmallString<128> Ret;
   sys::path::append(Ret, sys::path::parent_path(path), sys::path::stem(path));
   return Ret.str();
 }
 
-unsigned GetCompletionPriority(const CodeCompletionString& CCS,
+unsigned GetCompletionPriority(const CodeCompletionString &CCS,
                                CXCursorKind result_kind,
-                               const std::optional<std::string>& typedText) {
+                               const std::optional<std::string> &typedText) {
   unsigned priority = CCS.getPriority();
   if (CCS.getAvailability() != CXAvailability_Available ||
       result_kind == CXCursor_Destructor ||
@@ -196,35 +188,29 @@ void BuildCompletionItemTexts(std::vector<lsCompletionItem> &out,
       // clang-format on
     }
 
-    for (auto i = out_first; i < out.size(); ++i)
+    if (Kind != CodeCompletionString::CK_Informative)
-      out[i].label += text;
+      for (auto i = out_first; i < out.size(); ++i) {
+        out[i].label += text;
+        if (!include_snippets && !out[i].parameters_.empty())
+          continue;
 
-    if (Kind == CodeCompletionString::CK_Informative)
+        if (Kind == CodeCompletionString::CK_Placeholder) {
-      continue;
+          out[i].insertText +=
-
-    for (auto i = out_first; i < out.size(); ++i) {
-      if (!include_snippets && !out[i].parameters_.empty())
-        continue;
-
-      if (Kind == CodeCompletionString::CK_Placeholder) {
-        out[i].insertText +=
             "${" + std::to_string(out[i].parameters_.size()) + ":" + text + "}";
-        out[i].insertTextFormat = lsInsertTextFormat::Snippet;
+          out[i].insertTextFormat = lsInsertTextFormat::Snippet;
-      } else {
+        } else {
-        out[i].insertText += text;
+          out[i].insertText += text;
+        }
       }
+  }
+
+  if (result_type.size())
+    for (auto i = out_first; i < out.size(); ++i) {
+      // ' : ' for variables,
+      // ' -> ' (trailing return type-like) for functions
+      out[i].label += (out[i].label == out[i].filterText ? " : " : " -> ");
+      out[i].label += result_type;
     }
-  }
-
-  if (result_type.empty())
-    return;
-
-  for (auto i = out_first; i < out.size(); ++i) {
-    // ' : ' for variables,
-    // ' -> ' (trailing return type-like) for functions
-    out[i].label += (out[i].label == out[i].filterText ? " : " : " -> ");
-    out[i].label += result_type;
-  }
 }
 
 // |do_insert|: if |!do_insert|, do not append strings to |insert| after
@@ -298,56 +284,87 @@ void BuildDetailString(const CodeCompletionString &CCS, lsCompletionItem &item,
   }
 }
 
+class CaptureCompletionResults : public CodeCompleteConsumer {
+  std::shared_ptr<clang::GlobalCodeCompletionAllocator> Alloc;
+  CodeCompletionTUInfo CCTUInfo;
+
+public:
+  std::vector<lsCompletionItem> ls_items;
+
+  CaptureCompletionResults(const CodeCompleteOptions &Opts)
+      : CodeCompleteConsumer(Opts, false),
+        Alloc(std::make_shared<clang::GlobalCodeCompletionAllocator>()),
+        CCTUInfo(Alloc) {}
+
+  void ProcessCodeCompleteResults(Sema &S, 
+    CodeCompletionContext Context,
+    CodeCompletionResult *Results,
+    unsigned NumResults) override {
+    ls_items.reserve(NumResults);
+    for (unsigned i = 0; i != NumResults; i++) {
+      CodeCompletionString *CCS = Results[i].CreateCodeCompletionString(
+          S, Context, getAllocator(), getCodeCompletionTUInfo(),
+          includeBriefComments());
+      if (CCS->getAvailability() == CXAvailability_NotAvailable)
+        continue;
+
+      lsCompletionItem ls_item;
+      ls_item.kind = GetCompletionKind(Results[i].CursorKind);
+      if (const char* brief = CCS->getBriefComment())
+        ls_item.documentation = brief;
+
+      // label/detail/filterText/insertText/priority
+      if (g_config->completion.detailedLabel) {
+        ls_item.detail = CCS->getParentContextName().str();
+
+        size_t first_idx = ls_items.size();
+        ls_items.push_back(ls_item);
+        BuildCompletionItemTexts(ls_items, *CCS,
+                                 g_config->client.snippetSupport);
+
+        for (size_t j = first_idx; j < ls_items.size(); j++) {
+          if (g_config->client.snippetSupport &&
+              ls_items[j].insertTextFormat == lsInsertTextFormat::Snippet)
+            ls_items[j].insertText += "$0";
+          ls_items[j].priority_ = GetCompletionPriority(
+              *CCS, Results[i].CursorKind, ls_items[i].filterText);
+        }
+      } else {
+        bool do_insert = true;
+        int angle_stack = 0;
+        BuildDetailString(*CCS, ls_item, do_insert,
+                          &ls_item.parameters_,
+                          g_config->client.snippetSupport, angle_stack);
+        if (g_config->client.snippetSupport &&
+            ls_item.insertTextFormat == lsInsertTextFormat::Snippet)
+          ls_item.insertText += "$0";
+        ls_item.priority_ =
+            GetCompletionPriority(*CCS, Results[i].CursorKind, ls_item.label);
+        ls_items.push_back(ls_item);
+      }
+    }
+  }
+
+  CodeCompletionAllocator &getAllocator() override { return *Alloc; }
+
+  CodeCompletionTUInfo &getCodeCompletionTUInfo() override { return CCTUInfo;}
+};
+
 void TryEnsureDocumentParsed(ClangCompleteManager* manager,
                              std::shared_ptr<CompletionSession> session,
                              std::unique_ptr<ClangTranslationUnit>* tu,
-                             ClangIndex* index,
                              bool emit_diag) {
   // Nothing to do. We already have a translation unit.
   if (*tu)
     return;
 
-  std::vector<std::string> args = session->file.args;
+  const auto &args = session->file.args;
-
-  // -fspell-checking enables FixIts for, ie, misspelled types.
-  if (!std::count(args.begin(), args.end(), "-fno-spell-checking") &&
-      !std::count(args.begin(), args.end(), "-fspell-checking")) {
-    args.push_back("-fspell-checking");
-  }
-
   WorkingFiles::Snapshot snapshot = session->working_files->AsSnapshot(
       {StripFileType(session->file.filename)});
-  std::vector<CXUnsavedFile> unsaved = snapshot.AsUnsavedFiles();
 
   LOG_S(INFO) << "Creating completion session with arguments "
               << StringJoin(args, " ");
-  *tu = ClangTranslationUnit::Create(index, session->file.filename, args,
+  *tu = ClangTranslationUnit::Create(session->file.filename, args, snapshot);
-                                     unsaved, Flags());
-
-  // Build diagnostics.
-  if (g_config->diagnostics.onParse && *tu) {
-    // If we're emitting diagnostics, do an immediate reparse, otherwise we will
-    // emit stale/bad diagnostics.
-    *tu = ClangTranslationUnit::Reparse(std::move(*tu), unsaved);
-    if (!*tu) {
-      LOG_S(ERROR) << "Reparsing translation unit for diagnostics failed for "
-                   << session->file.filename;
-      return;
-    }
-
-    std::vector<lsDiagnostic> ls_diagnostics;
-    unsigned num_diagnostics = clang_getNumDiagnostics((*tu)->cx_tu);
-    for (unsigned i = 0; i < num_diagnostics; ++i) {
-      std::optional<lsDiagnostic> diagnostic = BuildAndDisposeDiagnostic(
-          clang_getDiagnostic((*tu)->cx_tu, i), session->file.filename);
-      // Filter messages like "too many errors emitted, stopping now
-      // [-ferror-limit=]" which has line = 0 and got subtracted by 1 after
-      // conversion to lsDiagnostic
-      if (diagnostic && diagnostic->range.start.line >= 0)
-        ls_diagnostics.push_back(*diagnostic);
-    }
-    manager->on_diagnostic_(session->file.filename, ls_diagnostics);
-  }
 }
 
 void CompletionPreloadMain(ClangCompleteManager* completion_manager) {
@@ -374,8 +391,7 @@ void CompletionPreloadMain(ClangCompleteManager* completion_manager) {
       continue;
 
     std::unique_ptr<ClangTranslationUnit> parsing;
-    TryEnsureDocumentParsed(completion_manager, session, &parsing, &tu->index,
+    TryEnsureDocumentParsed(completion_manager, session, &parsing, true);
-                            true);
 
     // Activate new translation unit.
     std::lock_guard<std::mutex> lock(tu->lock);
@@ -404,84 +420,43 @@ void CompletionQueryMain(ClangCompleteManager* completion_manager) {
                                           true /*create_if_needed*/);
 
     std::lock_guard<std::mutex> lock(session->completion.lock);
-    TryEnsureDocumentParsed(completion_manager, session, &session->completion.tu,
+    TryEnsureDocumentParsed(completion_manager, session, &session->completion.tu, false);
-                            &session->completion.index, false);
 
     // It is possible we failed to create the document despite
     // |TryEnsureDocumentParsed|.
-    if (!session->completion.tu)
+    if (ClangTranslationUnit* tu = session->completion.tu.get()) {
-      continue;
+      WorkingFiles::Snapshot snapshot =
+          completion_manager->working_files_->AsSnapshot({StripFileType(path)});
+      IntrusiveRefCntPtr<FileManager> FileMgr(&tu->Unit->getFileManager());
+      IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions());
+      IntrusiveRefCntPtr<DiagnosticsEngine> Diag(new DiagnosticsEngine(
+          IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), &*DiagOpts));
+      // StoreDiags Diags;
+      // IntrusiveRefCntPtr<DiagnosticsEngine> DiagE =
+      //     CompilerInstance::createDiagnostics(DiagOpts.get(), &Diags, false);
 
-    WorkingFiles::Snapshot snapshot =
+      IntrusiveRefCntPtr<SourceManager> SrcMgr(
-        completion_manager->working_files_->AsSnapshot({StripFileType(path)});
+          new SourceManager(*Diag, *FileMgr));
-    std::vector<CXUnsavedFile> unsaved = snapshot.AsUnsavedFiles();
+      std::vector<ASTUnit::RemappedFile> Remapped = GetRemapped(snapshot);
+      SmallVector<StoredDiagnostic, 8> Diagnostics;
+      SmallVector<const llvm::MemoryBuffer *, 1> TemporaryBuffers;
 
-    unsigned const kCompleteOptions =
+      CodeCompleteOptions Opts;
-        CXCodeComplete_IncludeMacros | CXCodeComplete_IncludeBriefComments;
+      LangOptions LangOpts;
-    CXCodeCompleteResults* cx_results = clang_codeCompleteAt(
+      Opts.IncludeBriefComments = true;
-        session->completion.tu->cx_tu, session->file.filename.c_str(),
+      Opts.LoadExternal = false;
-        request->position.line + 1, request->position.character + 1,
+      Opts.IncludeFixIts = true;
-        unsaved.data(), (unsigned)unsaved.size(), kCompleteOptions);
+      CaptureCompletionResults capture(Opts);
-    if (!cx_results) {
+      tu->Unit->CodeComplete(session->file.filename, request->position.line + 1,
-      request->on_complete({}, false /*is_cached_result*/);
+                             request->position.character + 1, Remapped,
-      continue;
+                             /*IncludeMacros=*/true,
+                             /*IncludeCodePatterns=*/false,
+                             /*IncludeBriefComments=*/true, capture, tu->PCHCO,
+                             *Diag, LangOpts, *SrcMgr, *FileMgr, Diagnostics,
+                             TemporaryBuffers);
+      request->on_complete(capture.ls_items, false /*is_cached_result*/);
+      // completion_manager->on_diagnostic_(session->file.filename, Diags.take());
     }
-
-    std::vector<lsCompletionItem> ls_result;
-    // this is a guess but can be larger in case of std::optional
-    // parameters, as they may be expanded into multiple items
-    ls_result.reserve(cx_results->NumResults);
-
-    for (unsigned i = 0; i < cx_results->NumResults; ++i) {
-      CXCompletionResult& result = cx_results->Results[i];
-      auto CCS = (CodeCompletionString *)result.CompletionString;
-      if (CCS->getAvailability() == CXAvailability_NotAvailable)
-        continue;
-
-      lsCompletionItem ls_item;
-      ls_item.kind = GetCompletionKind(result.CursorKind);
-      if (const char* brief = CCS->getBriefComment())
-        ls_item.documentation = brief;
-
-      // label/detail/filterText/insertText/priority
-      if (g_config->completion.detailedLabel) {
-        ls_item.detail = CCS->getParentContextName().str();
-
-        auto first_idx = ls_result.size();
-        ls_result.push_back(ls_item);
-
-        // label/filterText/insertText
-        BuildCompletionItemTexts(ls_result, *CCS,
-                                 g_config->client.snippetSupport);
-
-        for (auto i = first_idx; i < ls_result.size(); ++i) {
-          if (g_config->client.snippetSupport &&
-              ls_result[i].insertTextFormat == lsInsertTextFormat::Snippet) {
-            ls_result[i].insertText += "$0";
-          }
-
-          ls_result[i].priority_ = GetCompletionPriority(
-              *CCS, result.CursorKind, ls_result[i].filterText);
-        }
-      } else {
-        bool do_insert = true;
-        int angle_stack = 0;
-        BuildDetailString(*CCS, ls_item, do_insert,
-                          &ls_item.parameters_,
-                          g_config->client.snippetSupport, angle_stack);
-        if (g_config->client.snippetSupport &&
-            ls_item.insertTextFormat == lsInsertTextFormat::Snippet)
-          ls_item.insertText += "$0";
-        ls_item.priority_ =
-            GetCompletionPriority(*CCS, result.CursorKind, ls_item.label);
-        ls_result.push_back(ls_item);
-      }
-    }
-
-    request->on_complete(ls_result, false /*is_cached_result*/);
-
-    // Make sure |ls_results| is destroyed before clearing |cx_results|.
-    clang_disposeCodeCompleteResults(cx_results);
   }
 }
 
@@ -500,44 +475,72 @@ void DiagnosticQueryMain(ClangCompleteManager* completion_manager) {
 
     // At this point, we must have a translation unit. Block until we have one.
     std::lock_guard<std::mutex> lock(session->diagnostics.lock);
-    TryEnsureDocumentParsed(
+    TryEnsureDocumentParsed(completion_manager, session,
-        completion_manager, session, &session->diagnostics.tu,
+                            &session->diagnostics.tu,
-        &session->diagnostics.index, false /*emit_diagnostics*/);
+                            false /*emit_diagnostics*/);
 
     // It is possible we failed to create the document despite
     // |TryEnsureDocumentParsed|.
-    if (!session->diagnostics.tu)
+    ClangTranslationUnit* tu = session->diagnostics.tu.get();
+    if (!tu)
       continue;
 
     WorkingFiles::Snapshot snapshot =
         completion_manager->working_files_->AsSnapshot({StripFileType(path)});
-    std::vector<CXUnsavedFile> unsaved = snapshot.AsUnsavedFiles();
+    llvm::CrashRecoveryContext CRC;
-
+    if (tu->Reparse(CRC, snapshot)) {
-    // Emit diagnostics.
-    session->diagnostics.tu = ClangTranslationUnit::Reparse(
-        std::move(session->diagnostics.tu), unsaved);
-    if (!session->diagnostics.tu) {
       LOG_S(ERROR) << "Reparsing translation unit for diagnostics failed for "
                    << path;
       continue;
     }
 
-    size_t num_diagnostics =
+    auto &SM = tu->Unit->getSourceManager();
-        clang_getNumDiagnostics(session->diagnostics.tu->cx_tu);
+    auto &LangOpts = tu->Unit->getLangOpts();
-    std::vector<lsDiagnostic> ls_diagnostics;
+    std::vector<lsDiagnostic> ls_diags;
-    ls_diagnostics.reserve(num_diagnostics);
+    for (ASTUnit::stored_diag_iterator I = tu->Unit->stored_diag_begin(),
-    for (unsigned i = 0; i < num_diagnostics; ++i) {
+                                       E = tu->Unit->stored_diag_end();
-      CXDiagnostic cx_diag =
+         I != E; ++I) {
-          clang_getDiagnostic(session->diagnostics.tu->cx_tu, i);
+      FullSourceLoc FLoc = I->getLocation();
-      std::optional<lsDiagnostic> diagnostic =
+      SourceRange R;
-          BuildAndDisposeDiagnostic(cx_diag, path);
+      for (const auto &CR : I->getRanges()) {
-      // Filter messages like "too many errors emitted, stopping now
+        auto RT = Lexer::makeFileCharRange(CR, SM, LangOpts);
-      // [-ferror-limit=]" which has line = 0 and got subtracted by 1 after
+        if (SM.isPointWithin(FLoc, RT.getBegin(), RT.getEnd())) {
-      // conversion to lsDiagnostic
+          R = CR.getAsRange();
-      if (diagnostic && diagnostic->range.start.line >= 0)
+          break;
-        ls_diagnostics.push_back(*diagnostic);
+        }
+      }
+      Range r = R.isValid() ? FromCharRange(SM, LangOpts, R)
+                            : FromTokenRange(SM, LangOpts, {FLoc, FLoc});
+      lsDiagnostic ls_diag;
+      ls_diag.range =
+          lsRange{{r.start.line, r.start.column}, {r.end.line, r.end.column}};
+      switch (I->getLevel()) {
+      case DiagnosticsEngine::Ignored:
+        // llvm_unreachable
+        break;
+      case DiagnosticsEngine::Note:
+      case DiagnosticsEngine::Remark:
+        ls_diag.severity = lsDiagnosticSeverity::Information;
+        break;
+      case DiagnosticsEngine::Warning:
+        ls_diag.severity = lsDiagnosticSeverity::Warning;
+        break;
+      case DiagnosticsEngine::Error:
+      case DiagnosticsEngine::Fatal:
+        ls_diag.severity = lsDiagnosticSeverity::Error;
+      }
+      ls_diag.message = I->getMessage().str();
+      for (const FixItHint &FixIt : I->getFixIts()) {
+        lsTextEdit edit;
+        edit.newText = FixIt.CodeToInsert;
+        r = FromCharRange(SM, LangOpts, FixIt.RemoveRange.getAsRange());
+        edit.range =
+            lsRange{{r.start.line, r.start.column}, {r.end.line, r.end.column}};
+        ls_diag.fixits_.push_back(edit);
+      }
+      ls_diags.push_back(ls_diag);
     }
-    completion_manager->on_diagnostic_(path, ls_diagnostics);
+    completion_manager->on_diagnostic_(path, ls_diags);
   }
 }
 

src/clang_complete.h

@@ -19,8 +19,6 @@ struct CompletionSession
     : public std::enable_shared_from_this<CompletionSession> {
   // Translation unit for clang.
   struct Tu {
-    ClangIndex index{0, 0};
-
     // When |tu| was last parsed.
     std::optional<std::chrono::time_point<std::chrono::high_resolution_clock>>
         last_parsed_at;

src/clang_tu.cc

@@ -4,173 +4,113 @@
 #include "log.hh"
 #include "platform.h"
 #include "utils.h"
+#include "working_files.h"
+
+#include <llvm/Support/CrashRecoveryContext.h>
+using namespace clang;
 
 #include <assert.h>
-#include <string.h>
-#include <algorithm>
 #include <mutex>
 
-namespace {
+Range FromSourceRange(const SourceManager &SM, const LangOptions &LangOpts,
-
+                      SourceRange R, llvm::sys::fs::UniqueID *UniqueID,
-void EmitDiagnostics(std::string path,
+                      bool token) {
-                     std::vector<const char*> args,
+  SourceLocation BLoc = R.getBegin(), ELoc = R.getEnd();
-                     CXTranslationUnit tu) {
+  std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(BLoc);
-  std::string output = "Fatal errors while trying to parse " + path + "\n";
+  std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(ELoc);
-  output +=
+  if (token)
-      "Args: " +
+    EInfo.second += Lexer::MeasureTokenLength(ELoc, SM, LangOpts);
-      StringJoinMap(args, [](const char* arg) { return std::string(arg); }) +
+  unsigned l0 = SM.getLineNumber(BInfo.first, BInfo.second) - 1,
-      "\n";
+           c0 = SM.getColumnNumber(BInfo.first, BInfo.second) - 1,
-
+           l1 = SM.getLineNumber(EInfo.first, EInfo.second) - 1,
-  size_t num_diagnostics = clang_getNumDiagnostics(tu);
+           c1 = SM.getColumnNumber(EInfo.first, EInfo.second) - 1;
-  for (unsigned i = 0; i < num_diagnostics; ++i) {
+  if (l0 > INT16_MAX)
-    output += "  - ";
+    l0 = 0;
-
+  if (c0 > INT16_MAX)
-    CXDiagnostic diagnostic = clang_getDiagnostic(tu, i);
+    c0 = 0;
-
+  if (l1 > INT16_MAX)
-    // Location.
+    l1 = 0;
-    CXFile file;
+  if (c1 > INT16_MAX)
-    unsigned int line, column;
+    c1 = 0;
-    clang_getSpellingLocation(clang_getDiagnosticLocation(diagnostic), &file,
+  if (UniqueID) {
-                              &line, &column, nullptr);
+    if (const FileEntry *F = SM.getFileEntryForID(BInfo.first))
-    std::string path = FileName(file);
+      *UniqueID = F->getUniqueID();
-    output += path + ":" + std::to_string(line - 1) + ":" +
+    else
-              std::to_string(column) + " ";
+      *UniqueID = llvm::sys::fs::UniqueID(0, 0);
-
-    // Severity
-    switch (clang_getDiagnosticSeverity(diagnostic)) {
-      case CXDiagnostic_Ignored:
-      case CXDiagnostic_Note:
-        output += "[info]";
-        break;
-      case CXDiagnostic_Warning:
-        output += "[warning]";
-        break;
-      case CXDiagnostic_Error:
-        output += "[error]";
-        break;
-      case CXDiagnostic_Fatal:
-        output += "[fatal]";
-        break;
-    }
-
-    // Content.
-    output += " " + ToString(clang_getDiagnosticSpelling(diagnostic));
-
-    clang_disposeDiagnostic(diagnostic);
-
-    output += "\n";
   }
-
+  return {{int16_t(l0), int16_t(c0)}, {int16_t(l1), int16_t(c1)}};
-  LOG_S(WARNING) << output;
-}
-}  // namespace
-
-ClangIndex::ClangIndex() : ClangIndex(1, 0) {}
-
-ClangIndex::ClangIndex(int exclude_declarations_from_pch,
-                       int display_diagnostics) {
-  // llvm::InitializeAllTargets (and possibly others) called by
-  // clang_createIndex transtively modifies/reads lib/Support/TargetRegistry.cpp
-  // FirstTarget. There will be a race condition if two threads call
-  // clang_createIndex concurrently.
-  static std::mutex mutex_;
-  std::lock_guard<std::mutex> lock(mutex_);
-
-  cx_index =
-      clang_createIndex(exclude_declarations_from_pch, display_diagnostics);
 }
 
-ClangIndex::~ClangIndex() {
+Range FromCharRange(const SourceManager &SM, const LangOptions &LangOpts,
-  clang_disposeIndex(cx_index);
+                    SourceRange R,
+                    llvm::sys::fs::UniqueID *UniqueID) {
+  return FromSourceRange(SM, LangOpts, R, UniqueID, false);
 }
 
-// static
+Range FromTokenRange(const SourceManager &SM, const LangOptions &LangOpts,
-std::unique_ptr<ClangTranslationUnit> ClangTranslationUnit::Create(
+                     SourceRange R,
-    ClangIndex* index,
+                     llvm::sys::fs::UniqueID *UniqueID) {
-    const std::string& filepath,
+  return FromSourceRange(SM, LangOpts, R, UniqueID, true);
-    const std::vector<std::string>& arguments,
+}
-    std::vector<CXUnsavedFile>& unsaved_files,
-    unsigned flags) {
-  std::vector<const char*> args;
-  for (auto& arg : arguments)
-    args.push_back(arg.c_str());
 
-  CXTranslationUnit cx_tu;
+std::vector<ASTUnit::RemappedFile>
-  CXErrorCode error_code;
+GetRemapped(const WorkingFiles::Snapshot &snapshot) {
-  {
+  std::vector<ASTUnit::RemappedFile> Remapped;
-    error_code = clang_parseTranslationUnit2FullArgv(
+  for (auto &file : snapshot.files) {
-        index->cx_index, nullptr, args.data(), (int)args.size(),
+    std::unique_ptr<llvm::MemoryBuffer> MB =
-        unsaved_files.data(), (unsigned)unsaved_files.size(), flags, &cx_tu);
+        llvm::MemoryBuffer::getMemBufferCopy(file.content, file.filename);
+    Remapped.emplace_back(file.filename, MB.release());
   }
+  return Remapped;
+}
 
-  if (error_code != CXError_Success && cx_tu)
+std::unique_ptr<ClangTranslationUnit>
-    EmitDiagnostics(filepath, args, cx_tu);
+ClangTranslationUnit::Create(const std::string &filepath,
+                             const std::vector<std::string> &args,
+                             const WorkingFiles::Snapshot &snapshot) {
+  std::vector<const char *> Args;
+  for (auto& arg : args)
+    Args.push_back(arg.c_str());
+  Args.push_back("-fno-spell-checking");
 
-  // We sometimes dump the command to logs and ask the user to run it. Include
+  auto ret = std::make_unique<ClangTranslationUnit>();
-  // -fsyntax-only so they don't do a full compile.
+  IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
-  auto make_msg = [&]() {
+      CompilerInstance::createDiagnostics(new DiagnosticOptions));
-    return "Please try running the following, identify which flag causes the "
+  std::vector<ASTUnit::RemappedFile> Remapped = GetRemapped(snapshot);
-           "issue, and report a bug. ccls will then filter the flag for you "
+
-           " automatically:\n " +
+  ret->PCHCO = std::make_shared<PCHContainerOperations>();
-           StringJoin(args, " ") + " -fsyntax-only";
+  std::unique_ptr<ASTUnit> ErrUnit, Unit;
+  llvm::CrashRecoveryContext CRC;
+  auto parse = [&]() {
+    Unit.reset(ASTUnit::LoadFromCommandLine(
+        Args.data(), Args.data() + Args.size(),
+        /*PCHContainerOpts=*/ret->PCHCO, Diags,
+        /*ResourceFilePath=*/"", /*OnlyLocalDecls=*/false,
+        /*CaptureDiagnostics=*/true, Remapped,
+        /*RemappedFilesKeepOriginalName=*/true, 1, TU_Prefix,
+        /*CacheCodeCompletionResults=*/true, true,
+        /*AllowPCHWithCompilerErrors=*/true, SkipFunctionBodiesScope::None,
+        /*SingleFileParse=*/false,
+        /*UserFilesAreVolatile=*/true, false,
+        ret->PCHCO->getRawReader().getFormat(), &ErrUnit));
   };
-
+  if (!RunSafely(CRC, parse)) {
-  switch (error_code) {
+    LOG_S(ERROR)
-    case CXError_Success:
+        << "clang crashed for " << filepath << "\n"
-      return std::make_unique<ClangTranslationUnit>(cx_tu);
+        << StringJoin(args, " ") + " -fsyntax-only";
-    case CXError_Failure:
+    return {};
-      LOG_S(ERROR) << "libclang generic failure for " << filepath << ". "
-                   << make_msg();
-      return nullptr;
-    case CXError_Crashed:
-      LOG_S(ERROR) << "libclang crashed for " << filepath << ". " << make_msg();
-      return nullptr;
-    case CXError_InvalidArguments:
-      LOG_S(ERROR) << "libclang had invalid arguments for " << filepath << ". "
-                   << make_msg();
-      return nullptr;
-    case CXError_ASTReadError:
-      LOG_S(ERROR) << "libclang had ast read error for " << filepath << ". "
-                   << make_msg();
-      return nullptr;
   }
+  if (!Unit && !ErrUnit)
+    return {};
 
-  return nullptr;
+  ret->Unit = std::move(Unit);
+  return ret;
 }
 
-// static
+int ClangTranslationUnit::Reparse(llvm::CrashRecoveryContext &CRC,
-std::unique_ptr<ClangTranslationUnit> ClangTranslationUnit::Reparse(
+                                  const WorkingFiles::Snapshot &snapshot) {
-    std::unique_ptr<ClangTranslationUnit> tu,
+  int ret = 1;
-    std::vector<CXUnsavedFile>& unsaved) {
+  auto parse = [&]() { ret = Unit->Reparse(PCHCO, GetRemapped(snapshot)); };
-  int error_code = clang_reparseTranslationUnit(
+  (void)RunSafely(CRC, parse);
-      tu->cx_tu, (unsigned)unsaved.size(), unsaved.data(),
+  return ret;
-      clang_defaultReparseOptions(tu->cx_tu));
-
-  if (error_code != CXError_Success && tu->cx_tu)
-    EmitDiagnostics("<unknown>", {}, tu->cx_tu);
-
-  switch (error_code) {
-    case CXError_Success:
-      return tu;
-    case CXError_Failure:
-      LOG_S(ERROR) << "libclang reparse generic failure";
-      return nullptr;
-    case CXError_Crashed:
-      LOG_S(ERROR) << "libclang reparse crashed";
-      return nullptr;
-    case CXError_InvalidArguments:
-      LOG_S(ERROR) << "libclang reparse had invalid arguments";
-      return nullptr;
-    case CXError_ASTReadError:
-      LOG_S(ERROR) << "libclang reparse had ast read error";
-      return nullptr;
-  }
-
-  return nullptr;
-}
-
-ClangTranslationUnit::ClangTranslationUnit(CXTranslationUnit tu) : cx_tu(tu) {}
-
-ClangTranslationUnit::~ClangTranslationUnit() {
-  clang_disposeTranslationUnit(cx_tu);
 }

src/clang_tu.h

@@ -1,40 +1,45 @@
 #pragma once
 #include "position.h"
+#include "working_files.h"
 
-#include <clang-c/Index.h>
+#include <clang/Frontend/ASTUnit.h>
+#include <clang/Frontend/CompilerInstance.h>
+#include <llvm/Support/CrashRecoveryContext.h>
 
 #include <memory>
 #include <string>
 #include <vector>
+#include <stdlib.h>
 
-// Simple RAII wrapper about CXIndex.
+std::vector<clang::ASTUnit::RemappedFile>
-// Note: building a ClangIndex instance acquires a global lock, since libclang
+GetRemapped(const WorkingFiles::Snapshot &snapshot);
-// API does not appear to be thread-safe here.
+
-class ClangIndex {
+Range FromCharRange(const clang::SourceManager &SM, const clang::LangOptions &LangOpts,
- public:
+                    clang::SourceRange R,
-  ClangIndex();
+                    llvm::sys::fs::UniqueID *UniqueID = nullptr);
-  ClangIndex(int exclude_declarations_from_pch, int display_diagnostics);
+
-  ~ClangIndex();
+Range FromTokenRange(const clang::SourceManager &SM, const clang::LangOptions &LangOpts,
-  CXIndex cx_index;
+                     clang::SourceRange R,
-};
+                     llvm::sys::fs::UniqueID *UniqueID = nullptr);
+
+template <typename Fn>
+bool RunSafely(llvm::CrashRecoveryContext &CRC, Fn &&fn) {
+  const char *env = getenv("CCLS_CRASH_RECOVERY");
+  if (env && strcmp(env, "0") == 0) {
+    fn();
+    return true;
+  }
+  return CRC.RunSafely(fn);
+}
 
-// RAII wrapper around CXTranslationUnit which also makes it much more
-// challenging to use a CXTranslationUnit instance that is not correctly
-// initialized.
 struct ClangTranslationUnit {
-  static std::unique_ptr<ClangTranslationUnit> Create(
+  static std::unique_ptr<ClangTranslationUnit>
-      ClangIndex* index,
+  Create(const std::string &filepath, const std::vector<std::string> &arguments,
-      const std::string& filepath,
+         const WorkingFiles::Snapshot &snapshot);
-      const std::vector<std::string>& arguments,
-      std::vector<CXUnsavedFile>& unsaved_files,
-      unsigned flags);
 
-  static std::unique_ptr<ClangTranslationUnit> Reparse(
+  int Reparse(llvm::CrashRecoveryContext &CRC,
-      std::unique_ptr<ClangTranslationUnit> tu,
+              const WorkingFiles::Snapshot &snapshot);
-      std::vector<CXUnsavedFile>& unsaved);
 
-  explicit ClangTranslationUnit(CXTranslationUnit tu);
+  std::shared_ptr<clang::PCHContainerOperations> PCHCO;
-  ~ClangTranslationUnit();
+  std::unique_ptr<clang::ASTUnit> Unit;
-
-  CXTranslationUnit cx_tu;
 };

src/clang_utils.cc

@@ -1,113 +1,12 @@
 #include "clang_utils.h"
 
+#include "filesystem.hh"
 #include "platform.h"
 
-#include "filesystem.hh"
+#include <clang/AST/Type.h>
 using namespace clang;
 using namespace llvm;
 
-namespace {
-
-lsRange GetLsRangeForFixIt(const CXSourceRange& range) {
-  CXSourceLocation start = clang_getRangeStart(range);
-  CXSourceLocation end = clang_getRangeEnd(range);
-
-  unsigned int start_line, start_column;
-  clang_getSpellingLocation(start, nullptr, &start_line, &start_column,
-                            nullptr);
-  unsigned int end_line, end_column;
-  clang_getSpellingLocation(end, nullptr, &end_line, &end_column, nullptr);
-
-  return lsRange{lsPosition{int(start_line) - 1, int(start_column) - 1},
-                 lsPosition{int(end_line) - 1, int(end_column)}};
-}
-
-}  // namespace
-
-// See clang_formatDiagnostic
-std::optional<lsDiagnostic> BuildAndDisposeDiagnostic(CXDiagnostic diagnostic,
-                                                 const std::string& path) {
-  // Get diagnostic location.
-  CXFile file;
-  unsigned start_line, start_column;
-  clang_getSpellingLocation(clang_getDiagnosticLocation(diagnostic), &file,
-                            &start_line, &start_column, nullptr);
-
-  if (file && path != FileName(file)) {
-    clang_disposeDiagnostic(diagnostic);
-    return std::nullopt;
-  }
-
-  unsigned end_line = start_line, end_column = start_column,
-           num_ranges = clang_getDiagnosticNumRanges(diagnostic);
-  for (unsigned i = 0; i < num_ranges; i++) {
-    CXFile file0, file1;
-    unsigned line0, column0, line1, column1;
-    CXSourceRange range = clang_getDiagnosticRange(diagnostic, i);
-    clang_getSpellingLocation(clang_getRangeStart(range), &file0, &line0,
-                              &column0, nullptr);
-    clang_getSpellingLocation(clang_getRangeEnd(range), &file1, &line1,
-                              &column1, nullptr);
-    if (file0 != file1 || file0 != file)
-      continue;
-    if (line0 < start_line || (line0 == start_line && column0 < start_column)) {
-      start_line = line0;
-      start_column = column0;
-    }
-    if (line1 > end_line || (line1 == end_line && column1 > end_column)) {
-      end_line = line1;
-      end_column = column1;
-    }
-  }
-
-  // Build diagnostic.
-  lsDiagnostic ls_diagnostic;
-  ls_diagnostic.range = lsRange{{int(start_line) - 1, int(start_column) - 1},
-                                {int(end_line) - 1, int(end_column) - 1}};
-
-  ls_diagnostic.message = ToString(clang_getDiagnosticSpelling(diagnostic));
-
-  // Append the flag that enables this diagnostic, ie, [-Wswitch]
-  std::string enabling_flag =
-      ToString(clang_getDiagnosticOption(diagnostic, nullptr));
-  if (!enabling_flag.empty())
-    ls_diagnostic.message += " [" + enabling_flag + "]";
-
-  ls_diagnostic.code = clang_getDiagnosticCategory(diagnostic);
-
-  switch (clang_getDiagnosticSeverity(diagnostic)) {
-    case CXDiagnostic_Ignored:
-      // llvm_unreachable
-      break;
-    case CXDiagnostic_Note:
-      ls_diagnostic.severity = lsDiagnosticSeverity::Information;
-      break;
-    case CXDiagnostic_Warning:
-      ls_diagnostic.severity = lsDiagnosticSeverity::Warning;
-      break;
-    case CXDiagnostic_Error:
-    case CXDiagnostic_Fatal:
-      ls_diagnostic.severity = lsDiagnosticSeverity::Error;
-      break;
-  }
-
-  // Report fixits
-  unsigned num_fixits = clang_getDiagnosticNumFixIts(diagnostic);
-  for (unsigned i = 0; i < num_fixits; ++i) {
-    CXSourceRange replacement_range;
-    CXString text = clang_getDiagnosticFixIt(diagnostic, i, &replacement_range);
-
-    lsTextEdit edit;
-    edit.newText = ToString(text);
-    edit.range = GetLsRangeForFixIt(replacement_range);
-    ls_diagnostic.fixits_.push_back(edit);
-  }
-
-  clang_disposeDiagnostic(diagnostic);
-
-  return ls_diagnostic;
-}
-
 std::string FileName(CXFile file) {
   std::string ret;
   // clang > 6
@@ -153,34 +52,145 @@ std::string ToString(CXCursorKind kind) {
   return ToString(clang_getCursorKindSpelling(kind));
 }
 
-const char* ClangBuiltinTypeName(CXTypeKind kind) {
+// clang::BuiltinType::getName without PrintingPolicy
-  switch (kind) {
+const char* ClangBuiltinTypeName(int kind) {
-    // clang-format off
+  switch (BuiltinType::Kind(kind)) {
-    case CXType_Bool: return "bool";
+  case BuiltinType::Void:
-    case CXType_Char_U: return "char";
+    return "void";
-    case CXType_UChar: return "unsigned char";
+  case BuiltinType::Bool:
-    case CXType_Char16: return "char16_t";
+    return "bool";
-    case CXType_Char32: return "char32_t";
+  case BuiltinType::Char_S:
-    case CXType_UShort: return "unsigned short";
+    return "char";
-    case CXType_UInt: return "unsigned int";
+  case BuiltinType::Char_U:
-    case CXType_ULong: return "unsigned long";
+    return "char";
-    case CXType_ULongLong: return "unsigned long long";
+  case BuiltinType::SChar:
-    case CXType_UInt128: return "unsigned __int128";
+    return "signed char";
-    case CXType_Char_S: return "char";
+  case BuiltinType::Short:
-    case CXType_SChar: return "signed char";
+    return "short";
-    case CXType_WChar: return "wchar_t";
+  case BuiltinType::Int:
-    case CXType_Short: return "short";
+    return "int";
-    case CXType_Int: return "int";
+  case BuiltinType::Long:
-    case CXType_Long: return "long";
+    return "long";
-    case CXType_LongLong: return "long long";
+  case BuiltinType::LongLong:
-    case CXType_Int128: return "__int128";
+    return "long long";
-    case CXType_Float: return "float";
+  case BuiltinType::Int128:
-    case CXType_Double: return "double";
+    return "__int128";
-    case CXType_LongDouble: return "long double";
+  case BuiltinType::UChar:
-    case CXType_Float128: return "__float128";
+    return "unsigned char";
-    case CXType_Half: return "_Float16";
+  case BuiltinType::UShort:
-    case CXType_NullPtr: return "nullptr";
+    return "unsigned short";
-    default: return "";
+  case BuiltinType::UInt:
-    // clang-format on
+    return "unsigned int";
+  case BuiltinType::ULong:
+    return "unsigned long";
+  case BuiltinType::ULongLong:
+    return "unsigned long long";
+  case BuiltinType::UInt128:
+    return "unsigned __int128";
+  case BuiltinType::Half:
+    return "__fp16";
+  case BuiltinType::Float:
+    return "float";
+  case BuiltinType::Double:
+    return "double";
+  case BuiltinType::LongDouble:
+    return "long double";
+  case BuiltinType::ShortAccum:
+    return "short _Accum";
+  case BuiltinType::Accum:
+    return "_Accum";
+  case BuiltinType::LongAccum:
+    return "long _Accum";
+  case BuiltinType::UShortAccum:
+    return "unsigned short _Accum";
+  case BuiltinType::UAccum:
+    return "unsigned _Accum";
+  case BuiltinType::ULongAccum:
+    return "unsigned long _Accum";
+  case BuiltinType::BuiltinType::ShortFract:
+    return "short _Fract";
+  case BuiltinType::BuiltinType::Fract:
+    return "_Fract";
+  case BuiltinType::BuiltinType::LongFract:
+    return "long _Fract";
+  case BuiltinType::BuiltinType::UShortFract:
+    return "unsigned short _Fract";
+  case BuiltinType::BuiltinType::UFract:
+    return "unsigned _Fract";
+  case BuiltinType::BuiltinType::ULongFract:
+    return "unsigned long _Fract";
+  case BuiltinType::BuiltinType::SatShortAccum:
+    return "_Sat short _Accum";
+  case BuiltinType::BuiltinType::SatAccum:
+    return "_Sat _Accum";
+  case BuiltinType::BuiltinType::SatLongAccum:
+    return "_Sat long _Accum";
+  case BuiltinType::BuiltinType::SatUShortAccum:
+    return "_Sat unsigned short _Accum";
+  case BuiltinType::BuiltinType::SatUAccum:
+    return "_Sat unsigned _Accum";
+  case BuiltinType::BuiltinType::SatULongAccum:
+    return "_Sat unsigned long _Accum";
+  case BuiltinType::BuiltinType::SatShortFract:
+    return "_Sat short _Fract";
+  case BuiltinType::BuiltinType::SatFract:
+    return "_Sat _Fract";
+  case BuiltinType::BuiltinType::SatLongFract:
+    return "_Sat long _Fract";
+  case BuiltinType::BuiltinType::SatUShortFract:
+    return "_Sat unsigned short _Fract";
+  case BuiltinType::BuiltinType::SatUFract:
+    return "_Sat unsigned _Fract";
+  case BuiltinType::BuiltinType::SatULongFract:
+    return "_Sat unsigned long _Fract";
+  case BuiltinType::Float16:
+    return "_Float16";
+  case BuiltinType::Float128:
+    return "__float128";
+  case BuiltinType::WChar_S:
+  case BuiltinType::WChar_U:
+    return "wchar_t";
+  case BuiltinType::Char8:
+    return "char8_t";
+  case BuiltinType::Char16:
+    return "char16_t";
+  case BuiltinType::Char32:
+    return "char32_t";
+  case BuiltinType::NullPtr:
+    return "nullptr_t";
+  case BuiltinType::Overload:
+    return "<overloaded function type>";
+  case BuiltinType::BoundMember:
+    return "<bound member function type>";
+  case BuiltinType::PseudoObject:
+    return "<pseudo-object type>";
+  case BuiltinType::Dependent:
+    return "<dependent type>";
+  case BuiltinType::UnknownAny:
+    return "<unknown type>";
+  case BuiltinType::ARCUnbridgedCast:
+    return "<ARC unbridged cast type>";
+  case BuiltinType::BuiltinFn:
+    return "<builtin fn type>";
+  case BuiltinType::ObjCId:
+    return "id";
+  case BuiltinType::ObjCClass:
+    return "Class";
+  case BuiltinType::ObjCSel:
+    return "SEL";
+  case BuiltinType::OCLSampler:
+    return "sampler_t";
+  case BuiltinType::OCLEvent:
+    return "event_t";
+  case BuiltinType::OCLClkEvent:
+    return "clk_event_t";
+  case BuiltinType::OCLQueue:
+    return "queue_t";
+  case BuiltinType::OCLReserveID:
+    return "reserve_id_t";
+  case BuiltinType::OMPArraySection:
+    return "<OpenMP array section type>";
+  default:
+    return "";
   }
 }

src/clang_utils.h

@@ -8,9 +8,6 @@
 #include <optional>
 #include <vector>
 
-std::optional<lsDiagnostic> BuildAndDisposeDiagnostic(CXDiagnostic diagnostic,
-                                                 const std::string& path);
-
 // Returns the absolute path to |file|.
 std::string FileName(CXFile file);
 std::string FileName(const clang::FileEntry& file);
@@ -19,4 +16,4 @@ std::string ToString(CXString cx_string);
 
 std::string ToString(CXCursorKind cursor_kind);
 
-const char* ClangBuiltinTypeName(CXTypeKind);
+const char* ClangBuiltinTypeName(int);

src/indexer.cc

@@ -1,5 +1,6 @@
 #include "indexer.h"
 
+#include "clang_tu.h"
 #include "log.hh"
 #include "platform.h"
 #include "serializer.h"
@@ -83,43 +84,6 @@ StringRef GetSourceInRange(const SourceManager &SM, const LangOptions &LangOpts,
                                       BInfo.second);
 }
 
-Range FromSourceRange(const SourceManager &SM, const LangOptions &LangOpts,
-                      SourceRange R, llvm::sys::fs::UniqueID *UniqueID,
-                      bool token) {
-  SourceLocation BLoc = R.getBegin(), ELoc = R.getEnd();
-  std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(BLoc);
-  std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(ELoc);
-  if (token)
-    EInfo.second += Lexer::MeasureTokenLength(ELoc, SM, LangOpts);
-  unsigned l0 = SM.getLineNumber(BInfo.first, BInfo.second) - 1,
-           c0 = SM.getColumnNumber(BInfo.first, BInfo.second) - 1,
-           l1 = SM.getLineNumber(EInfo.first, EInfo.second) - 1,
-           c1 = SM.getColumnNumber(EInfo.first, EInfo.second) - 1;
-  if (l0 > INT16_MAX) l0 = 0;
-  if (c0 > INT16_MAX) c0 = 0;
-  if (l1 > INT16_MAX) l1 = 0;
-  if (c1 > INT16_MAX) c1 = 0;
-  if (UniqueID) {
-    if (const FileEntry *F = SM.getFileEntryForID(BInfo.first))
-      *UniqueID = F->getUniqueID();
-    else
-      *UniqueID = llvm::sys::fs::UniqueID(0, 0);
-  }
-  return {{int16_t(l0), int16_t(c0)}, {int16_t(l1), int16_t(c1)}};
-}
-
-Range FromCharRange(const SourceManager &SM, const LangOptions &LangOpts,
-                    SourceRange R,
-                    llvm::sys::fs::UniqueID *UniqueID = nullptr) {
-  return FromSourceRange(SM, LangOpts, R, UniqueID, false);
-}
-
-Range FromTokenRange(const SourceManager &SM, const LangOptions &LangOpts,
-                     SourceRange R,
-                     llvm::sys::fs::UniqueID *UniqueID = nullptr) {
-  return FromSourceRange(SM, LangOpts, R, UniqueID, true);
-}
-
 SymbolKind GetSymbolKind(const Decl* D) {
   switch (D->getKind()) {
   case Decl::TranslationUnit:
@@ -1154,29 +1118,20 @@ std::vector<std::unique_ptr<IndexFile>> Index(
       DataConsumer, IndexOpts, std::make_unique<IndexFrontendAction>(param));
 
   DiagnosticErrorTrap DiagTrap(*Diags);
-  bool success = false;
   llvm::CrashRecoveryContext CRC;
-  {
+  auto compile = [&]() {
-    auto compile = [&]() {
+    ASTUnit::LoadFromCompilerInvocationAction(
-      success = ASTUnit::LoadFromCompilerInvocationAction(
+        std::move(CI), PCHCO, Diags, IndexAction.get(), Unit.get(),
-          std::move(CI), PCHCO, Diags, IndexAction.get(), Unit.get(),
+        /*Persistent=*/true, /*ResourceDir=*/"",
-          /*Persistent=*/true, /*ResourceDir=*/"",
+        /*OnlyLocalDecls=*/true,
-          /*OnlyLocalDecls=*/true,
+        /*CaptureDiagnostics=*/true, 0, false, false, true);
-          /*CaptureDiagnostics=*/true, 0, false, false, true);
+  };
-    };
+  if (!RunSafely(CRC, compile)) {
-    const char *env = getenv("CCLS_CRASH_RECOVERY");
+    LOG_S(ERROR) << "clang crashed for " << file;
-    if (env && strcmp(env, "0") == 0)
-      compile();
-    else
-      CRC.RunSafely(compile);
-  }
-
-  if (!Unit) {
-    LOG_S(ERROR) << "failed to index " << file;
     return {};
   }
-  if (!success) {
+  if (!Unit) {
-    LOG_S(ERROR) << "clang crashed for " << file;
+    LOG_S(ERROR) << "failed to index " << file;
     return {};
   }
 

src/messages/textDocument_didOpen.cc

@@ -51,6 +51,8 @@ struct Handler_TextDocumentDidOpen
 
     include_complete->AddFile(working_file->filename);
     clang_complete->NotifyView(path);
+    if (g_config->diagnostics.onParse)
+      clang_complete->DiagnosticsUpdate({params.textDocument.uri});
     if (params.args.size())
       project->SetFlagsForFile(params.args, path);
 

src/working_files.cc

@@ -195,20 +195,6 @@ std::optional<int> FindMatchingLine(const std::vector<std::string>& index_lines,
 
 }  // namespace
 
-std::vector<CXUnsavedFile> WorkingFiles::Snapshot::AsUnsavedFiles() const {
-  std::vector<CXUnsavedFile> result;
-  result.reserve(files.size());
-  for (auto& file : files) {
-    CXUnsavedFile unsaved;
-    unsaved.Filename = file.filename.c_str();
-    unsaved.Contents = file.content.c_str();
-    unsaved.Length = (unsigned long)file.content.size();
-
-    result.push_back(unsaved);
-  }
-  return result;
-}
-
 WorkingFile::WorkingFile(const std::string& filename,
                          const std::string& buffer_content)
     : filename(filename), buffer_content(buffer_content) {

src/working_files.h

@@ -84,7 +84,6 @@ struct WorkingFiles {
       std::string content;
     };
 
-    std::vector<CXUnsavedFile> AsUnsavedFiles() const;
     std::vector<File> files;
   };