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List:       cfe-commits
Subject:    [PATCH] D53953: [clang-tidy] Get ClangTidyContext out of the business of storing diagnostics. NFC
From:       Sam McCall via Phabricator via cfe-commits <cfe-commits () lists ! llvm ! org>
Date:       2018-10-31 22:59:56
Message-ID: 5099bb9ef2c6baa9704832a698801ba2 () localhost ! localdomain
[Download RAW message or body]

sammccall updated this revision to Diff 172039.
sammccall added a comment.

Remove backwards-compat behavior around ClangdDiagnosticConsumer::finish(),=
 it's presumably a bug
Update test to verify we fail but don't crash in that case.
auto -> real type


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D53953

Files:
  clang-tidy/ClangTidy.cpp
  clang-tidy/ClangTidy.h
  clang-tidy/ClangTidyDiagnosticConsumer.cpp
  clang-tidy/ClangTidyDiagnosticConsumer.h
  clang-tidy/tool/ClangTidyMain.cpp
  test/clang-tidy/clang-tidy-run-with-database.cpp
  unittests/clang-tidy/ClangTidyTest.h


["D53953.172039.patch" (text/x-patch)]

Index: unittests/clang-tidy/ClangTidyTest.h
===================================================================
--- unittests/clang-tidy/ClangTidyTest.h
+++ unittests/clang-tidy/ClangTidyTest.h
@@ -118,15 +118,15 @@
   Invocation.setDiagnosticConsumer(&DiagConsumer);
   if (!Invocation.run()) {
     std::string ErrorText;
-    for (const auto &Error : Context.getErrors()) {
+    for (const auto &Error : DiagConsumer.take()) {
       ErrorText += Error.Message.Message + "\n";
     }
     llvm::report_fatal_error(ErrorText);
   }
 
-  DiagConsumer.finish();
   tooling::Replacements Fixes;
-  for (const ClangTidyError &Error : Context.getErrors()) {
+  std::vector<ClangTidyError> Diags = DiagConsumer.take();
+  for (const ClangTidyError &Error : Diags) {
     for (const auto &FileAndFixes : Error.Fix) {
       for (const auto &Fix : FileAndFixes.second) {
         auto Err = Fixes.add(Fix);
@@ -139,7 +139,7 @@
     }
   }
   if (Errors)
-    *Errors = Context.getErrors();
+    *Errors = std::move(Diags);
   auto Result = tooling::applyAllReplacements(Code, Fixes);
   if (!Result) {
     // FIXME: propogate the error.
Index: test/clang-tidy/clang-tidy-run-with-database.cpp
===================================================================
--- test/clang-tidy/clang-tidy-run-with-database.cpp
+++ test/clang-tidy/clang-tidy-run-with-database.cpp
@@ -8,7 +8,13 @@
 // RUN: echo 'int *HP = 0;' > %T/compilation-database-test/include/header.h
 // RUN: echo '#include "header.h"' > %T/compilation-database-test/b/d.cpp
 // RUN: sed 's|test_dir|%/T/compilation-database-test|g' \
                %S/Inputs/compilation-database/template.json > \
                %T/compile_commands.json
-// RUN: clang-tidy --checks=-*,modernize-use-nullptr -p %T \
%T/compilation-database-test/b/not-exist -header-filter=.* +
+// Regression test: shouldn't crash.
+// RUN: not clang-tidy --checks=-*,modernize-use-nullptr -p %T \
%T/compilation-database-test/b/not-exist -header-filter=.* 2>&1 | FileCheck %s \
-check-prefix=CHECK-NOT-EXIST +// CHECK-NOT-EXIST: Error while processing \
{{.*}}/not-exist. +// CHECK-NOT-EXIST: unable to handle compilation
+// CHECK-NOT-EXIST: Found compiler error
+
 // RUN: clang-tidy --checks=-*,modernize-use-nullptr -p %T \
%T/compilation-database-test/a/a.cpp %T/compilation-database-test/a/b.cpp \
%T/compilation-database-test/b/b.cpp %T/compilation-database-test/b/c.cpp \
%T/compilation-database-test/b/d.cpp -header-filter=.* -fix  // RUN: FileCheck \
-input-file=%T/compilation-database-test/a/a.cpp %s -check-prefix=CHECK-FIX1  // RUN: \
FileCheck -input-file=%T/compilation-database-test/a/b.cpp %s \
                -check-prefix=CHECK-FIX2
Index: clang-tidy/tool/ClangTidyMain.cpp
===================================================================
--- clang-tidy/tool/ClangTidyMain.cpp
+++ clang-tidy/tool/ClangTidyMain.cpp
@@ -422,9 +422,9 @@
 
   ClangTidyContext Context(std::move(OwningOptionsProvider),
                            AllowEnablingAnalyzerAlphaCheckers);
-  runClangTidy(Context, OptionsParser.getCompilations(), PathList, BaseFS,
-               EnableCheckProfile, ProfilePrefix);
-  ArrayRef<ClangTidyError> Errors = Context.getErrors();
+  std::vector<ClangTidyError> Errors =
+      runClangTidy(Context, OptionsParser.getCompilations(), PathList, BaseFS,
+                   EnableCheckProfile, ProfilePrefix);
   bool FoundErrors = llvm::find_if(Errors, [](const ClangTidyError &E) {
                        return E.DiagLevel == ClangTidyError::Error;
                      }) != Errors.end();
@@ -434,7 +434,7 @@
   unsigned WErrorCount = 0;
 
   // -fix-errors implies -fix.
-  handleErrors(Context, (FixErrors || Fix) && !DisableFixes, WErrorCount,
+  handleErrors(Errors, Context, (FixErrors || Fix) && !DisableFixes, WErrorCount,
                BaseFS);
 
   if (!ExportFixes.empty() && !Errors.empty()) {
Index: clang-tidy/ClangTidyDiagnosticConsumer.h
===================================================================
--- clang-tidy/ClangTidyDiagnosticConsumer.h
+++ clang-tidy/ClangTidyDiagnosticConsumer.h
@@ -160,12 +160,6 @@
   /// counters.
   const ClangTidyStats &getStats() const { return Stats; }
 
-  /// \brief Returns all collected errors.
-  ArrayRef<ClangTidyError> getErrors() const { return Errors; }
-
-  /// \brief Clears collected errors.
-  void clearErrors() { Errors.clear(); }
-
   /// \brief Control profile collection in clang-tidy.
   void setEnableProfiling(bool Profile);
   bool getEnableProfiling() const { return Profile; }
@@ -203,7 +197,6 @@
   /// \brief Store an \p Error.
   void storeError(const ClangTidyError &Error);
 
-  std::vector<ClangTidyError> Errors;
   DiagnosticsEngine *DiagEngine;
   std::unique_ptr<ClangTidyOptionsProvider> OptionsProvider;
 
@@ -243,13 +236,12 @@
   void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
                         const Diagnostic &Info) override;
 
-  /// \brief Flushes the internal diagnostics buffer to the ClangTidyContext.
-  void finish() override;
+  // Retrieve the diagnostics that were captured.
+  std::vector<ClangTidyError> take();
 
 private:
   void finalizeLastError();
-
-  void removeIncompatibleErrors(SmallVectorImpl<ClangTidyError> &Errors) const;
+  void removeIncompatibleErrors();
 
   /// \brief Returns the \c HeaderFilter constructed for the options set in the
   /// context.
@@ -263,7 +255,8 @@
   ClangTidyContext &Context;
   bool RemoveIncompatibleErrors;
   std::unique_ptr<DiagnosticsEngine> Diags;
-  SmallVector<ClangTidyError, 8> Errors;
+  std::vector<ClangTidyError> Errors;
+  std::vector<ClangTidyError> FinalizedErrors;
   std::unique_ptr<llvm::Regex> HeaderFilter;
   bool LastErrorRelatesToUserCode;
   bool LastErrorPassesLineFilter;
Index: clang-tidy/ClangTidyDiagnosticConsumer.cpp
===================================================================
--- clang-tidy/ClangTidyDiagnosticConsumer.cpp
+++ clang-tidy/ClangTidyDiagnosticConsumer.cpp
@@ -259,11 +259,6 @@
   return WarningAsErrorFilter->contains(CheckName);
 }
 
-/// \brief Store a \c ClangTidyError.
-void ClangTidyContext::storeError(const ClangTidyError &Error) {
-  Errors.push_back(Error);
-}
-
 StringRef ClangTidyContext::getCheckName(unsigned DiagnosticID) const {
   llvm::DenseMap<unsigned, std::string>::const_iterator I =
       CheckNamesByDiagnosticID.find(DiagnosticID);
@@ -534,8 +529,7 @@
   return HeaderFilter.get();
 }
 
-void ClangTidyDiagnosticConsumer::removeIncompatibleErrors(
-    SmallVectorImpl<ClangTidyError> &Errors) const {
+void ClangTidyDiagnosticConsumer::removeIncompatibleErrors() {
   // Each error is modelled as the set of intervals in which it applies
   // replacements. To detect overlapping replacements, we use a sweep line
   // algorithm over these sets of intervals.
@@ -673,18 +667,13 @@
 };
 } // end anonymous namespace
 
-// Flushes the internal diagnostics buffer to the ClangTidyContext.
-void ClangTidyDiagnosticConsumer::finish() {
+std::vector<ClangTidyError> ClangTidyDiagnosticConsumer::take() {
   finalizeLastError();
 
   std::sort(Errors.begin(), Errors.end(), LessClangTidyError());
   Errors.erase(std::unique(Errors.begin(), Errors.end(), EqualClangTidyError()),
                Errors.end());
-
   if (RemoveIncompatibleErrors)
-    removeIncompatibleErrors(Errors);
-
-  for (const ClangTidyError &Error : Errors)
-    Context.storeError(Error);
-  Errors.clear();
+    removeIncompatibleErrors();
+  return std::move(Errors);
 }
Index: clang-tidy/ClangTidy.h
===================================================================
--- clang-tidy/ClangTidy.h
+++ clang-tidy/ClangTidy.h
@@ -230,20 +230,22 @@
 /// \param StoreCheckProfile If provided, and EnableCheckProfile is true,
 /// the profile will not be output to stderr, but will instead be stored
 /// as a JSON file in the specified directory.
-void runClangTidy(clang::tidy::ClangTidyContext &Context,
-                  const tooling::CompilationDatabase &Compilations,
-                  ArrayRef<std::string> InputFiles,
-                  llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS,
-                  bool EnableCheckProfile = false,
-                  llvm::StringRef StoreCheckProfile = StringRef());
+std::vector<ClangTidyError>
+runClangTidy(clang::tidy::ClangTidyContext &Context,
+             const tooling::CompilationDatabase &Compilations,
+             ArrayRef<std::string> InputFiles,
+             llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS,
+             bool EnableCheckProfile = false,
+             llvm::StringRef StoreCheckProfile = StringRef());
 
 // FIXME: This interface will need to be significantly extended to be useful.
 // FIXME: Implement confidence levels for displaying/fixing errors.
 //
 /// \brief Displays the found \p Errors to the users. If \p Fix is true, \p
 /// Errors containing fixes are automatically applied and reformatted. If no
 /// clang-format configuration file is found, the given \P FormatStyle is used.
-void handleErrors(ClangTidyContext &Context, bool Fix,
+void handleErrors(llvm::ArrayRef<ClangTidyError> Diags,
+                  ClangTidyContext &Context, bool Fix,
                   unsigned &WarningsAsErrorsCount,
                   llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS);
 
Index: clang-tidy/ClangTidy.cpp
===================================================================
--- clang-tidy/ClangTidy.cpp
+++ clang-tidy/ClangTidy.cpp
@@ -500,11 +500,12 @@
   return Factory.getCheckOptions();
 }
 
-void runClangTidy(clang::tidy::ClangTidyContext &Context,
-                  const CompilationDatabase &Compilations,
-                  ArrayRef<std::string> InputFiles,
-                  llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS,
-                  bool EnableCheckProfile, llvm::StringRef StoreCheckProfile) {
+std::vector<ClangTidyError>
+runClangTidy(clang::tidy::ClangTidyContext &Context,
+             const CompilationDatabase &Compilations,
+             ArrayRef<std::string> InputFiles,
+             llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS,
+             bool EnableCheckProfile, llvm::StringRef StoreCheckProfile) {
   ClangTool Tool(Compilations, InputFiles,
                  std::make_shared<PCHContainerOperations>(), BaseFS);
 
@@ -586,9 +587,11 @@
 
   ActionFactory Factory(Context);
   Tool.run(&Factory);
+  return DiagConsumer.take();
 }
 
-void handleErrors(ClangTidyContext &Context, bool Fix,
+void handleErrors(llvm::ArrayRef<ClangTidyError> Diags,
+                  ClangTidyContext &Context, bool Fix,
                   unsigned &WarningsAsErrorsCount,
                   llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
   ErrorReporter Reporter(Context, Fix, BaseFS);
@@ -598,7 +601,7 @@
   if (!InitialWorkingDir)
     llvm::report_fatal_error("Cannot get current working path.");
 
-  for (const ClangTidyError &Error : Context.getErrors()) {
+  for (const ClangTidyError &Error : Diags) {
     if (!Error.BuildDirectory.empty()) {
       // By default, the working directory of file system is the current
       // clang-tidy running directory.


[Attachment #4 (text/plain)]

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