clang-tools  15.0.0git
ClangTidy.cpp
Go to the documentation of this file.
1 //===--- tools/extra/clang-tidy/ClangTidy.cpp - Clang tidy tool -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file This file implements a clang-tidy tool.
10 ///
11 /// This tool uses the Clang Tooling infrastructure, see
12 /// http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
13 /// for details on setting it up with LLVM source tree.
14 ///
15 //===----------------------------------------------------------------------===//
16 
17 #include "ClangTidy.h"
18 #include "ClangTidyCheck.h"
21 #include "ClangTidyProfiling.h"
23 #include "clang-tidy-config.h"
24 #include "clang/AST/ASTConsumer.h"
25 #include "clang/ASTMatchers/ASTMatchFinder.h"
26 #include "clang/Format/Format.h"
27 #include "clang/Frontend/ASTConsumers.h"
28 #include "clang/Frontend/CompilerInstance.h"
29 #include "clang/Frontend/FrontendDiagnostic.h"
30 #include "clang/Frontend/MultiplexConsumer.h"
31 #include "clang/Frontend/TextDiagnosticPrinter.h"
32 #include "clang/Lex/PPCallbacks.h"
33 #include "clang/Lex/Preprocessor.h"
34 #include "clang/Lex/PreprocessorOptions.h"
35 #include "clang/Rewrite/Frontend/FixItRewriter.h"
36 #include "clang/Rewrite/Frontend/FrontendActions.h"
37 #include "clang/Tooling/Core/Diagnostic.h"
38 #include "clang/Tooling/DiagnosticsYaml.h"
39 #include "clang/Tooling/Refactoring.h"
40 #include "clang/Tooling/ReplacementsYaml.h"
41 #include "clang/Tooling/Tooling.h"
42 #include "llvm/Support/Process.h"
43 #include <algorithm>
44 #include <utility>
45 
46 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
47 #include "clang/Analysis/PathDiagnostic.h"
48 #include "clang/StaticAnalyzer/Frontend/AnalysisConsumer.h"
49 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
50 
51 using namespace clang::ast_matchers;
52 using namespace clang::driver;
53 using namespace clang::tooling;
54 using namespace llvm;
55 
56 LLVM_INSTANTIATE_REGISTRY(clang::tidy::ClangTidyModuleRegistry)
57 
58 namespace clang {
59 namespace tidy {
60 
61 namespace {
62 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
63 static const char *AnalyzerCheckNamePrefix = "clang-analyzer-";
64 
65 class AnalyzerDiagnosticConsumer : public ento::PathDiagnosticConsumer {
66 public:
67  AnalyzerDiagnosticConsumer(ClangTidyContext &Context) : Context(Context) {}
68 
69  void FlushDiagnosticsImpl(std::vector<const ento::PathDiagnostic *> &Diags,
70  FilesMade *FilesMade) override {
71  for (const ento::PathDiagnostic *PD : Diags) {
72  SmallString<64> CheckName(AnalyzerCheckNamePrefix);
73  CheckName += PD->getCheckerName();
74  Context.diag(CheckName, PD->getLocation().asLocation(),
75  PD->getShortDescription())
76  << PD->path.back()->getRanges();
77 
78  for (const auto &DiagPiece :
79  PD->path.flatten(/*ShouldFlattenMacros=*/true)) {
80  Context.diag(CheckName, DiagPiece->getLocation().asLocation(),
81  DiagPiece->getString(), DiagnosticIDs::Note)
82  << DiagPiece->getRanges();
83  }
84  }
85  }
86 
87  StringRef getName() const override { return "ClangTidyDiags"; }
88  bool supportsLogicalOpControlFlow() const override { return true; }
89  bool supportsCrossFileDiagnostics() const override { return true; }
90 
91 private:
92  ClangTidyContext &Context;
93 };
94 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
95 
96 class ErrorReporter {
97 public:
98  ErrorReporter(ClangTidyContext &Context, FixBehaviour ApplyFixes,
99  llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS)
100  : Files(FileSystemOptions(), std::move(BaseFS)),
101  DiagOpts(new DiagnosticOptions()),
102  DiagPrinter(new TextDiagnosticPrinter(llvm::outs(), &*DiagOpts)),
103  Diags(IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), &*DiagOpts,
104  DiagPrinter),
105  SourceMgr(Diags, Files), Context(Context), ApplyFixes(ApplyFixes),
106  TotalFixes(0), AppliedFixes(0), WarningsAsErrors(0) {
107  DiagOpts->ShowColors = Context.getOptions().UseColor.getValueOr(
108  llvm::sys::Process::StandardOutHasColors());
109  DiagPrinter->BeginSourceFile(LangOpts);
110  if (DiagOpts->ShowColors && !llvm::sys::Process::StandardOutIsDisplayed()) {
111  llvm::sys::Process::UseANSIEscapeCodes(true);
112  }
113  }
114 
115  SourceManager &getSourceManager() { return SourceMgr; }
116 
117  void reportDiagnostic(const ClangTidyError &Error) {
118  const tooling::DiagnosticMessage &Message = Error.Message;
119  SourceLocation Loc = getLocation(Message.FilePath, Message.FileOffset);
120  // Contains a pair for each attempted fix: location and whether the fix was
121  // applied successfully.
122  SmallVector<std::pair<SourceLocation, bool>, 4> FixLocations;
123  {
124  auto Level = static_cast<DiagnosticsEngine::Level>(Error.DiagLevel);
125  std::string Name = Error.DiagnosticName;
126  if (!Error.EnabledDiagnosticAliases.empty())
127  Name += "," + llvm::join(Error.EnabledDiagnosticAliases, ",");
128  if (Error.IsWarningAsError) {
129  Name += ",-warnings-as-errors";
130  Level = DiagnosticsEngine::Error;
132  }
133  auto Diag = Diags.Report(Loc, Diags.getCustomDiagID(Level, "%0 [%1]"))
134  << Message.Message << Name;
135  for (const FileByteRange &FBR : Error.Message.Ranges)
136  Diag << getRange(FBR);
137  // FIXME: explore options to support interactive fix selection.
138  const llvm::StringMap<Replacements> *ChosenFix;
139  if (ApplyFixes != FB_NoFix &&
140  (ChosenFix = getFixIt(Error, ApplyFixes == FB_FixNotes))) {
141  for (const auto &FileAndReplacements : *ChosenFix) {
142  for (const auto &Repl : FileAndReplacements.second) {
143  ++TotalFixes;
144  bool CanBeApplied = false;
145  if (!Repl.isApplicable())
146  continue;
147  SourceLocation FixLoc;
148  SmallString<128> FixAbsoluteFilePath = Repl.getFilePath();
149  Files.makeAbsolutePath(FixAbsoluteFilePath);
150  tooling::Replacement R(FixAbsoluteFilePath, Repl.getOffset(),
151  Repl.getLength(), Repl.getReplacementText());
152  Replacements &Replacements = FileReplacements[R.getFilePath()];
153  llvm::Error Err = Replacements.add(R);
154  if (Err) {
155  // FIXME: Implement better conflict handling.
156  llvm::errs() << "Trying to resolve conflict: "
157  << llvm::toString(std::move(Err)) << "\n";
158  unsigned NewOffset =
159  Replacements.getShiftedCodePosition(R.getOffset());
160  unsigned NewLength = Replacements.getShiftedCodePosition(
161  R.getOffset() + R.getLength()) -
162  NewOffset;
163  if (NewLength == R.getLength()) {
164  R = Replacement(R.getFilePath(), NewOffset, NewLength,
165  R.getReplacementText());
166  Replacements = Replacements.merge(tooling::Replacements(R));
167  CanBeApplied = true;
168  ++AppliedFixes;
169  } else {
170  llvm::errs()
171  << "Can't resolve conflict, skipping the replacement.\n";
172  }
173  } else {
174  CanBeApplied = true;
175  ++AppliedFixes;
176  }
177  FixLoc = getLocation(FixAbsoluteFilePath, Repl.getOffset());
178  FixLocations.push_back(std::make_pair(FixLoc, CanBeApplied));
179  }
180  }
181  }
182  reportFix(Diag, Error.Message.Fix);
183  }
184  for (auto Fix : FixLocations) {
185  Diags.Report(Fix.first, Fix.second ? diag::note_fixit_applied
186  : diag::note_fixit_failed);
187  }
188  for (const auto &Note : Error.Notes)
189  reportNote(Note);
190  }
191 
192  void finish() {
193  if (TotalFixes > 0) {
194  Rewriter Rewrite(SourceMgr, LangOpts);
195  for (const auto &FileAndReplacements : FileReplacements) {
196  StringRef File = FileAndReplacements.first();
197  llvm::ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
198  SourceMgr.getFileManager().getBufferForFile(File);
199  if (!Buffer) {
200  llvm::errs() << "Can't get buffer for file " << File << ": "
201  << Buffer.getError().message() << "\n";
202  // FIXME: Maybe don't apply fixes for other files as well.
203  continue;
204  }
205  StringRef Code = Buffer.get()->getBuffer();
206  auto Style = format::getStyle(
207  *Context.getOptionsForFile(File).FormatStyle, File, "none");
208  if (!Style) {
209  llvm::errs() << llvm::toString(Style.takeError()) << "\n";
210  continue;
211  }
212  llvm::Expected<tooling::Replacements> Replacements =
213  format::cleanupAroundReplacements(Code, FileAndReplacements.second,
214  *Style);
215  if (!Replacements) {
216  llvm::errs() << llvm::toString(Replacements.takeError()) << "\n";
217  continue;
218  }
219  if (llvm::Expected<tooling::Replacements> FormattedReplacements =
220  format::formatReplacements(Code, *Replacements, *Style)) {
221  Replacements = std::move(FormattedReplacements);
222  if (!Replacements)
223  llvm_unreachable("!Replacements");
224  } else {
225  llvm::errs() << llvm::toString(FormattedReplacements.takeError())
226  << ". Skipping formatting.\n";
227  }
228  if (!tooling::applyAllReplacements(Replacements.get(), Rewrite)) {
229  llvm::errs() << "Can't apply replacements for file " << File << "\n";
230  }
231  }
232  if (Rewrite.overwriteChangedFiles()) {
233  llvm::errs() << "clang-tidy failed to apply suggested fixes.\n";
234  } else {
235  llvm::errs() << "clang-tidy applied " << AppliedFixes << " of "
236  << TotalFixes << " suggested fixes.\n";
237  }
238  }
239  }
240 
241  unsigned getWarningsAsErrorsCount() const { return WarningsAsErrors; }
242 
243 private:
244  SourceLocation getLocation(StringRef FilePath, unsigned Offset) {
245  if (FilePath.empty())
246  return SourceLocation();
247 
248  auto File = SourceMgr.getFileManager().getFile(FilePath);
249  if (!File)
250  return SourceLocation();
251 
252  FileID ID = SourceMgr.getOrCreateFileID(*File, SrcMgr::C_User);
253  return SourceMgr.getLocForStartOfFile(ID).getLocWithOffset(Offset);
254  }
255 
256  void reportFix(const DiagnosticBuilder &Diag,
257  const llvm::StringMap<Replacements> &Fix) {
258  for (const auto &FileAndReplacements : Fix) {
259  for (const auto &Repl : FileAndReplacements.second) {
260  if (!Repl.isApplicable())
261  continue;
262  FileByteRange FBR;
263  FBR.FilePath = Repl.getFilePath().str();
264  FBR.FileOffset = Repl.getOffset();
265  FBR.Length = Repl.getLength();
266 
267  Diag << FixItHint::CreateReplacement(getRange(FBR),
268  Repl.getReplacementText());
269  }
270  }
271  }
272 
273  void reportNote(const tooling::DiagnosticMessage &Message) {
274  SourceLocation Loc = getLocation(Message.FilePath, Message.FileOffset);
275  auto Diag =
276  Diags.Report(Loc, Diags.getCustomDiagID(DiagnosticsEngine::Note, "%0"))
277  << Message.Message;
278  for (const FileByteRange &FBR : Message.Ranges)
279  Diag << getRange(FBR);
280  reportFix(Diag, Message.Fix);
281  }
282 
283  CharSourceRange getRange(const FileByteRange &Range) {
284  SmallString<128> AbsoluteFilePath{Range.FilePath};
285  Files.makeAbsolutePath(AbsoluteFilePath);
286  SourceLocation BeginLoc = getLocation(AbsoluteFilePath, Range.FileOffset);
287  SourceLocation EndLoc = BeginLoc.getLocWithOffset(Range.Length);
288  // Retrieve the source range for applicable highlights and fixes. Macro
289  // definition on the command line have locations in a virtual buffer and
290  // don't have valid file paths and are therefore not applicable.
291  return CharSourceRange::getCharRange(BeginLoc, EndLoc);
292  }
293 
294  FileManager Files;
295  LangOptions LangOpts; // FIXME: use langopts from each original file
296  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
297  DiagnosticConsumer *DiagPrinter;
298  DiagnosticsEngine Diags;
299  SourceManager SourceMgr;
300  llvm::StringMap<Replacements> FileReplacements;
301  ClangTidyContext &Context;
302  FixBehaviour ApplyFixes;
303  unsigned TotalFixes;
304  unsigned AppliedFixes;
305  unsigned WarningsAsErrors;
306 };
307 
308 class ClangTidyASTConsumer : public MultiplexConsumer {
309 public:
310  ClangTidyASTConsumer(std::vector<std::unique_ptr<ASTConsumer>> Consumers,
311  std::unique_ptr<ClangTidyProfiling> Profiling,
312  std::unique_ptr<ast_matchers::MatchFinder> Finder,
313  std::vector<std::unique_ptr<ClangTidyCheck>> Checks)
314  : MultiplexConsumer(std::move(Consumers)),
315  Profiling(std::move(Profiling)), Finder(std::move(Finder)),
316  Checks(std::move(Checks)) {}
317 
318 private:
319  // Destructor order matters! Profiling must be destructed last.
320  // Or at least after Finder.
321  std::unique_ptr<ClangTidyProfiling> Profiling;
322  std::unique_ptr<ast_matchers::MatchFinder> Finder;
323  std::vector<std::unique_ptr<ClangTidyCheck>> Checks;
324 };
325 
326 } // namespace
327 
328 ClangTidyASTConsumerFactory::ClangTidyASTConsumerFactory(
329  ClangTidyContext &Context,
330  IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFS)
331  : Context(Context), OverlayFS(std::move(OverlayFS)),
332  CheckFactories(new ClangTidyCheckFactories) {
333  for (ClangTidyModuleRegistry::entry E : ClangTidyModuleRegistry::entries()) {
334  std::unique_ptr<ClangTidyModule> Module = E.instantiate();
335  Module->addCheckFactories(*CheckFactories);
336  }
337 }
338 
339 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
340 static void
341 setStaticAnalyzerCheckerOpts(const ClangTidyOptions &Opts,
342  clang::AnalyzerOptions &AnalyzerOptions) {
343  StringRef AnalyzerPrefix(AnalyzerCheckNamePrefix);
344  for (const auto &Opt : Opts.CheckOptions) {
345  StringRef OptName(Opt.getKey());
346  if (!OptName.consume_front(AnalyzerPrefix))
347  continue;
348  // Analyzer options are always local options so we can ignore priority.
349  AnalyzerOptions.Config[OptName] = Opt.getValue().Value;
350  }
351 }
352 
353 typedef std::vector<std::pair<std::string, bool>> CheckersList;
354 
355 static CheckersList getAnalyzerCheckersAndPackages(ClangTidyContext &Context,
356  bool IncludeExperimental) {
357  CheckersList List;
358 
359  const auto &RegisteredCheckers =
360  AnalyzerOptions::getRegisteredCheckers(IncludeExperimental);
361  bool AnalyzerChecksEnabled = false;
362  for (StringRef CheckName : RegisteredCheckers) {
363  std::string ClangTidyCheckName((AnalyzerCheckNamePrefix + CheckName).str());
364  AnalyzerChecksEnabled |= Context.isCheckEnabled(ClangTidyCheckName);
365  }
366 
367  if (!AnalyzerChecksEnabled)
368  return List;
369 
370  // List all static analyzer checkers that our filter enables.
371  //
372  // Always add all core checkers if any other static analyzer check is enabled.
373  // This is currently necessary, as other path sensitive checks rely on the
374  // core checkers.
375  for (StringRef CheckName : RegisteredCheckers) {
376  std::string ClangTidyCheckName((AnalyzerCheckNamePrefix + CheckName).str());
377 
378  if (CheckName.startswith("core") ||
379  Context.isCheckEnabled(ClangTidyCheckName)) {
380  List.emplace_back(std::string(CheckName), true);
381  }
382  }
383  return List;
384 }
385 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
386 
387 std::unique_ptr<clang::ASTConsumer>
389  clang::CompilerInstance &Compiler, StringRef File) {
390  // FIXME: Move this to a separate method, so that CreateASTConsumer doesn't
391  // modify Compiler.
392  SourceManager *SM = &Compiler.getSourceManager();
393  Context.setSourceManager(SM);
394  Context.setCurrentFile(File);
395  Context.setASTContext(&Compiler.getASTContext());
396 
397  auto WorkingDir = Compiler.getSourceManager()
398  .getFileManager()
399  .getVirtualFileSystem()
400  .getCurrentWorkingDirectory();
401  if (WorkingDir)
402  Context.setCurrentBuildDirectory(WorkingDir.get());
403 
404  std::vector<std::unique_ptr<ClangTidyCheck>> Checks =
405  CheckFactories->createChecksForLanguage(&Context);
406 
407  ast_matchers::MatchFinder::MatchFinderOptions FinderOptions;
408 
409  std::unique_ptr<ClangTidyProfiling> Profiling;
410  if (Context.getEnableProfiling()) {
411  Profiling = std::make_unique<ClangTidyProfiling>(
412  Context.getProfileStorageParams());
413  FinderOptions.CheckProfiling.emplace(Profiling->Records);
414  }
415 
416  std::unique_ptr<ast_matchers::MatchFinder> Finder(
417  new ast_matchers::MatchFinder(std::move(FinderOptions)));
418 
419  Preprocessor *PP = &Compiler.getPreprocessor();
420  Preprocessor *ModuleExpanderPP = PP;
421 
422  if (Context.getLangOpts().Modules && OverlayFS != nullptr) {
423  auto ModuleExpander = std::make_unique<ExpandModularHeadersPPCallbacks>(
424  &Compiler, OverlayFS);
425  ModuleExpanderPP = ModuleExpander->getPreprocessor();
426  PP->addPPCallbacks(std::move(ModuleExpander));
427  }
428 
429  for (auto &Check : Checks) {
430  Check->registerMatchers(&*Finder);
431  Check->registerPPCallbacks(*SM, PP, ModuleExpanderPP);
432  }
433 
434  std::vector<std::unique_ptr<ASTConsumer>> Consumers;
435  if (!Checks.empty())
436  Consumers.push_back(Finder->newASTConsumer());
437 
438 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
439  AnalyzerOptionsRef AnalyzerOptions = Compiler.getAnalyzerOpts();
440  AnalyzerOptions->CheckersAndPackages = getAnalyzerCheckersAndPackages(
441  Context, Context.canEnableAnalyzerAlphaCheckers());
442  if (!AnalyzerOptions->CheckersAndPackages.empty()) {
443  setStaticAnalyzerCheckerOpts(Context.getOptions(), *AnalyzerOptions);
444  AnalyzerOptions->AnalysisStoreOpt = RegionStoreModel;
445  AnalyzerOptions->AnalysisDiagOpt = PD_NONE;
446  AnalyzerOptions->AnalyzeNestedBlocks = true;
447  AnalyzerOptions->eagerlyAssumeBinOpBifurcation = true;
448  std::unique_ptr<ento::AnalysisASTConsumer> AnalysisConsumer =
449  ento::CreateAnalysisConsumer(Compiler);
450  AnalysisConsumer->AddDiagnosticConsumer(
451  new AnalyzerDiagnosticConsumer(Context));
452  Consumers.push_back(std::move(AnalysisConsumer));
453  }
454 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
455  return std::make_unique<ClangTidyASTConsumer>(
456  std::move(Consumers), std::move(Profiling), std::move(Finder),
457  std::move(Checks));
458 }
459 
460 std::vector<std::string> ClangTidyASTConsumerFactory::getCheckNames() {
461  std::vector<std::string> CheckNames;
462  for (const auto &CheckFactory : *CheckFactories) {
463  if (Context.isCheckEnabled(CheckFactory.getKey()))
464  CheckNames.emplace_back(CheckFactory.getKey());
465  }
466 
467 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
468  for (const auto &AnalyzerCheck : getAnalyzerCheckersAndPackages(
469  Context, Context.canEnableAnalyzerAlphaCheckers()))
470  CheckNames.push_back(AnalyzerCheckNamePrefix + AnalyzerCheck.first);
471 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
472 
473  llvm::sort(CheckNames);
474  return CheckNames;
475 }
476 
479  std::vector<std::unique_ptr<ClangTidyCheck>> Checks =
480  CheckFactories->createChecks(&Context);
481  for (const auto &Check : Checks)
482  Check->storeOptions(Options);
483  return Options;
484 }
485 
486 std::vector<std::string>
490  std::make_unique<DefaultOptionsProvider>(ClangTidyGlobalOptions(),
491  Options),
493  ClangTidyASTConsumerFactory Factory(Context);
494  return Factory.getCheckNames();
495 }
496 
501  std::make_unique<DefaultOptionsProvider>(ClangTidyGlobalOptions(),
502  Options),
504  ClangTidyASTConsumerFactory Factory(Context);
505  return Factory.getCheckOptions();
506 }
507 
508 std::vector<ClangTidyError>
510  const CompilationDatabase &Compilations,
511  ArrayRef<std::string> InputFiles,
512  llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> BaseFS,
513  bool ApplyAnyFix, bool EnableCheckProfile,
514  llvm::StringRef StoreCheckProfile) {
515  ClangTool Tool(Compilations, InputFiles,
516  std::make_shared<PCHContainerOperations>(), BaseFS);
517 
518  // Add extra arguments passed by the clang-tidy command-line.
519  ArgumentsAdjuster PerFileExtraArgumentsInserter =
520  [&Context](const CommandLineArguments &Args, StringRef Filename) {
521  ClangTidyOptions Opts = Context.getOptionsForFile(Filename);
522  CommandLineArguments AdjustedArgs = Args;
523  if (Opts.ExtraArgsBefore) {
524  auto I = AdjustedArgs.begin();
525  if (I != AdjustedArgs.end() && !StringRef(*I).startswith("-"))
526  ++I; // Skip compiler binary name, if it is there.
527  AdjustedArgs.insert(I, Opts.ExtraArgsBefore->begin(),
528  Opts.ExtraArgsBefore->end());
529  }
530  if (Opts.ExtraArgs)
531  AdjustedArgs.insert(AdjustedArgs.end(), Opts.ExtraArgs->begin(),
532  Opts.ExtraArgs->end());
533  return AdjustedArgs;
534  };
535 
536  Tool.appendArgumentsAdjuster(PerFileExtraArgumentsInserter);
537  Tool.appendArgumentsAdjuster(getStripPluginsAdjuster());
538  Context.setEnableProfiling(EnableCheckProfile);
539  Context.setProfileStoragePrefix(StoreCheckProfile);
540 
541  ClangTidyDiagnosticConsumer DiagConsumer(Context, nullptr, true, ApplyAnyFix);
542  DiagnosticsEngine DE(new DiagnosticIDs(), new DiagnosticOptions(),
543  &DiagConsumer, /*ShouldOwnClient=*/false);
544  Context.setDiagnosticsEngine(&DE);
545  Tool.setDiagnosticConsumer(&DiagConsumer);
546 
547  class ActionFactory : public FrontendActionFactory {
548  public:
549  ActionFactory(ClangTidyContext &Context,
550  IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> BaseFS)
551  : ConsumerFactory(Context, std::move(BaseFS)) {}
552  std::unique_ptr<FrontendAction> create() override {
553  return std::make_unique<Action>(&ConsumerFactory);
554  }
555 
556  bool runInvocation(std::shared_ptr<CompilerInvocation> Invocation,
557  FileManager *Files,
558  std::shared_ptr<PCHContainerOperations> PCHContainerOps,
559  DiagnosticConsumer *DiagConsumer) override {
560  // Explicitly ask to define __clang_analyzer__ macro.
561  Invocation->getPreprocessorOpts().SetUpStaticAnalyzer = true;
562  return FrontendActionFactory::runInvocation(
563  Invocation, Files, PCHContainerOps, DiagConsumer);
564  }
565 
566  private:
567  class Action : public ASTFrontendAction {
568  public:
569  Action(ClangTidyASTConsumerFactory *Factory) : Factory(Factory) {}
570  std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &Compiler,
571  StringRef File) override {
572  return Factory->createASTConsumer(Compiler, File);
573  }
574 
575  private:
577  };
578 
579  ClangTidyASTConsumerFactory ConsumerFactory;
580  };
581 
582  ActionFactory Factory(Context, std::move(BaseFS));
583  Tool.run(&Factory);
584  return DiagConsumer.take();
585 }
586 
587 void handleErrors(llvm::ArrayRef<ClangTidyError> Errors,
589  unsigned &WarningsAsErrorsCount,
590  llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
591  ErrorReporter Reporter(Context, Fix, std::move(BaseFS));
592  llvm::vfs::FileSystem &FileSystem =
593  Reporter.getSourceManager().getFileManager().getVirtualFileSystem();
594  auto InitialWorkingDir = FileSystem.getCurrentWorkingDirectory();
595  if (!InitialWorkingDir)
596  llvm::report_fatal_error("Cannot get current working path.");
597 
598  for (const ClangTidyError &Error : Errors) {
599  if (!Error.BuildDirectory.empty()) {
600  // By default, the working directory of file system is the current
601  // clang-tidy running directory.
602  //
603  // Change the directory to the one used during the analysis.
604  FileSystem.setCurrentWorkingDirectory(Error.BuildDirectory);
605  }
606  Reporter.reportDiagnostic(Error);
607  // Return to the initial directory to correctly resolve next Error.
608  FileSystem.setCurrentWorkingDirectory(InitialWorkingDir.get());
609  }
610  Reporter.finish();
611  WarningsAsErrorsCount += Reporter.getWarningsAsErrorsCount();
612 }
613 
614 void exportReplacements(const llvm::StringRef MainFilePath,
615  const std::vector<ClangTidyError> &Errors,
616  raw_ostream &OS) {
617  TranslationUnitDiagnostics TUD;
618  TUD.MainSourceFile = std::string(MainFilePath);
619  for (const auto &Error : Errors) {
620  tooling::Diagnostic Diag = Error;
621  TUD.Diagnostics.insert(TUD.Diagnostics.end(), Diag);
622  }
623 
624  yaml::Output YAML(OS);
625  YAML << TUD;
626 }
627 
628 } // namespace tidy
629 } // namespace clang
MultiplexConsumer
Range
CharSourceRange Range
SourceRange for the file name.
Definition: IncludeOrderCheck.cpp:38
ClangTidyDiagnosticConsumer.h
Loc
SourceLocation Loc
Definition: KernelNameRestrictionCheck.cpp:45
llvm
Some operations such as code completion produce a set of candidates.
Definition: YAMLGenerator.cpp:28
clang::tidy::ClangTidyOptions::OptionMap
llvm::StringMap< ClangTidyValue > OptionMap
Definition: ClangTidyOptions.h:115
clang::tidy::bugprone::getName
static SmallString< 64 > getName(const NamedDecl *ND)
Returns the diagnostic-friendly name of the node, or empty string.
Definition: EasilySwappableParametersCheck.cpp:1918
E
const Expr * E
Definition: AvoidBindCheck.cpp:88
clang::tidy::ClangTidyDiagnosticConsumer::take
std::vector< ClangTidyError > take()
Definition: ClangTidyDiagnosticConsumer.cpp:725
StoreCheckProfile
static cl::opt< std::string > StoreCheckProfile("store-check-profile", cl::desc(R"( By default reports are printed in tabulated format to stderr. When this option is passed, these per-TU profiles are instead stored as JSON. )"), cl::value_desc("prefix"), cl::cat(ClangTidyCategory))
DiagnosticConsumer
Checks
static cl::opt< std::string > Checks("checks", cl::desc(R"( Comma-separated list of globs with optional '-' prefix. Globs are processed in order of appearance in the list. Globs without '-' prefix add checks with matching names to the set, globs with the '-' prefix remove checks with matching names from the set of enabled checks. This option's value is appended to the value of the 'Checks' option in .clang-tidy file, if any. )"), cl::init(""), cl::cat(ClangTidyCategory))
clang::tidy::ClangTidyASTConsumerFactory::getCheckOptions
ClangTidyOptions::OptionMap getCheckOptions()
Get the union of options from all checks.
Definition: ClangTidy.cpp:477
clang::tidy::bugprone::Message
static const char Message[]
Definition: ReservedIdentifierCheck.cpp:31
Filename
std::string Filename
Filename as a string.
Definition: IncludeOrderCheck.cpp:39
clang::tidy::getCheckOptions
ClangTidyOptions::OptionMap getCheckOptions(const ClangTidyOptions &Options, bool AllowEnablingAnalyzerAlphaCheckers)
Returns the effective check-specific options.
Definition: ClangTidy.cpp:498
clang::tidy::ClangTidyDiagnosticConsumer
A diagnostic consumer that turns each Diagnostic into a SourceManager-independent ClangTidyError.
Definition: ClangTidyDiagnosticConsumer.h:246
clang::tidy::cppcoreguidelines::join
static std::string join(ArrayRef< SpecialMemberFunctionsCheck::SpecialMemberFunctionKind > SMFS, llvm::StringRef AndOr)
Definition: SpecialMemberFunctionsCheck.cpp:78
clang::tidy::handleErrors
void handleErrors(llvm::ArrayRef< ClangTidyError > Errors, ClangTidyContext &Context, FixBehaviour Fix, unsigned &WarningsAsErrorsCount, llvm::IntrusiveRefCntPtr< llvm::vfs::FileSystem > BaseFS)
Displays the found Errors to the users.
Definition: ClangTidy.cpp:587
clang::tidy::ClangTidyASTConsumerFactory::getCheckNames
std::vector< std::string > getCheckNames()
Get the list of enabled checks.
Definition: ClangTidy.cpp:460
SourceMgr
llvm::SourceMgr * SourceMgr
Definition: ConfigCompile.cpp:101
Fix
static cl::opt< bool > Fix("fix", cl::desc(R"( Apply suggested fixes. Without -fix-errors clang-tidy will bail out if any compilation errors were found. )"), cl::init(false), cl::cat(ClangTidyCategory))
clang::tidy::ClangTidyOptions
Contains options for clang-tidy.
Definition: ClangTidyOptions.h:50
clang::ast_matchers
Definition: AbseilMatcher.h:14
clang::tidy::ClangTidyCheckFactories
A collection of ClangTidyCheckFactory instances.
Definition: ClangTidyModule.h:28
clang::tidy::FixBehaviour
FixBehaviour
Controls what kind of fixes clang-tidy is allowed to apply.
Definition: ClangTidy.h:86
ClangTidyModuleRegistry.h
ClangTidy.h
Error
constexpr static llvm::SourceMgr::DiagKind Error
Definition: ConfigCompile.cpp:590
Offset
size_t Offset
Definition: CodeComplete.cpp:1203
clang::tidy::runClangTidy
std::vector< ClangTidyError > runClangTidy(clang::tidy::ClangTidyContext &Context, const CompilationDatabase &Compilations, ArrayRef< std::string > InputFiles, llvm::IntrusiveRefCntPtr< llvm::vfs::OverlayFileSystem > BaseFS, bool ApplyAnyFix, bool EnableCheckProfile, llvm::StringRef StoreCheckProfile)
Definition: ClangTidy.cpp:509
Code
std::string Code
Definition: FindTargetTests.cpp:67
AllowEnablingAnalyzerAlphaCheckers
static cl::opt< bool > AllowEnablingAnalyzerAlphaCheckers("allow-enabling-analyzer-alpha-checkers", cl::init(false), cl::Hidden, cl::cat(ClangTidyCategory))
This option allows enabling the experimental alpha checkers from the static analyzer.
clang::tidy::ClangTidyError
A detected error complete with information to display diagnostic and automatic fix.
Definition: ClangTidyDiagnosticConsumer.h:35
Diagnostic
DiagnosticCallback Diagnostic
Definition: ConfigCompile.cpp:100
clang::tooling
Definition: ClangTidy.h:25
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition: ClangTidyDiagnosticConsumer.h:66
Args
llvm::json::Object Args
Definition: Trace.cpp:138
Name
Token Name
Definition: MacroToEnumCheck.cpp:89
Files
llvm::DenseSet< FileID > Files
Definition: IncludeCleaner.cpp:194
Output
std::string Output
Definition: TraceTests.cpp:159
clang::tidy::bugprone::PP
static Preprocessor * PP
Definition: BadSignalToKillThreadCheck.cpp:29
clang::tidy::ClangTidyGlobalOptions
Global options.
Definition: ClangTidyOptions.h:42
WarningsAsErrors
static cl::opt< std::string > WarningsAsErrors("warnings-as-errors", cl::desc(R"( Upgrades warnings to errors. Same format as '-checks'. This option's value is appended to the value of the 'WarningsAsErrors' option in .clang-tidy file, if any. )"), cl::init(""), cl::cat(ClangTidyCategory))
clang::tidy::ClangTidyASTConsumerFactory
Definition: ClangTidy.h:33
ID
static char ID
Definition: Logger.cpp:74
EnableCheckProfile
static cl::opt< bool > EnableCheckProfile("enable-check-profile", cl::desc(R"( Enable per-check timing profiles, and print a report to stderr. )"), cl::init(false), cl::cat(ClangTidyCategory))
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27
OS
llvm::raw_string_ostream OS
Definition: TraceTests.cpp:160
ExpandModularHeadersPPCallbacks.h
Diags
CapturedDiags Diags
Definition: ConfigCompileTests.cpp:39
LangOpts
const LangOptions * LangOpts
Definition: ExtractFunction.cpp:366
clang::tidy::bugprone::reportDiagnostic
void reportDiagnostic(DiagnosticBuilder D, const T *Node, SourceRange SR, bool DefaultConstruction)
Definition: UnusedRaiiCheck.cpp:42
clang::tidy::cppcoreguidelines::toString
static llvm::StringRef toString(SpecialMemberFunctionsCheck::SpecialMemberFunctionKind K)
Definition: SpecialMemberFunctionsCheck.cpp:55
clang::tidy::getCheckNames
std::vector< std::string > getCheckNames(const ClangTidyOptions &Options, bool AllowEnablingAnalyzerAlphaCheckers)
Fills the list of check names that are enabled when the provided filters are applied.
Definition: ClangTidy.cpp:487
ClangTidyProfiling.h
clang::tidy::FB_FixNotes
@ FB_FixNotes
Apply fixes found in notes.
Definition: ClangTidy.h:92
clang::tidy::exportReplacements
void exportReplacements(const llvm::StringRef MainFilePath, const std::vector< ClangTidyError > &Errors, raw_ostream &OS)
Definition: ClangTidy.cpp:614
clang::tidy::getFixIt
const llvm::StringMap< tooling::Replacements > * getFixIt(const tooling::Diagnostic &Diagnostic, bool GetFixFromNotes)
Gets the Fix attached to Diagnostic.
Definition: ClangTidyDiagnosticConsumer.cpp:325
clang::tidy::ClangTidyASTConsumerFactory::createASTConsumer
std::unique_ptr< clang::ASTConsumer > createASTConsumer(clang::CompilerInstance &Compiler, StringRef File)
Returns an ASTConsumer that runs the specified clang-tidy checks.
Definition: ClangTidy.cpp:388
ClangTidyCheck.h
clang::tidy::FB_NoFix
@ FB_NoFix
Don't try to apply any fix.
Definition: ClangTidy.h:88
clang::clangd::MessageType::Error
@ Error
An error message.
clang::tidy::ClangTidyModuleRegistry
llvm::Registry< ClangTidyModule > ClangTidyModuleRegistry
Definition: ClangTidyModuleRegistry.h:18
Action
FieldAction Action
Definition: MemberwiseConstructor.cpp:261