clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp

   1 //===--- ExecuteCompilerInvocation.cpp ------------------------------------===//
   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 // This file holds ExecuteCompilerInvocation(). It is split into its own file to
  10 // minimize the impact of pulling in essentially everything else in Clang.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "clang/ARCMigrate/ARCMTActions.h"
  15 #include "clang/CodeGen/CodeGenAction.h"
  16 #include "clang/Config/config.h"
  17 #include "clang/Driver/Options.h"
  18 #include "clang/ExtractAPI/FrontendActions.h"
  19 #include "clang/Frontend/CompilerInstance.h"
  20 #include "clang/Frontend/CompilerInvocation.h"
  21 #include "clang/Frontend/FrontendActions.h"
  22 #include "clang/Frontend/FrontendDiagnostic.h"
  23 #include "clang/Frontend/FrontendPluginRegistry.h"
  24 #include "clang/Frontend/Utils.h"
  25 #include "clang/FrontendTool/Utils.h"
  26 #include "clang/Rewrite/Frontend/FrontendActions.h"
  27 #include "clang/StaticAnalyzer/Frontend/AnalyzerHelpFlags.h"
  28 #include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
  29 #include "llvm/Option/OptTable.h"
  30 #include "llvm/Option/Option.h"
  31 #include "llvm/Support/BuryPointer.h"
  32 #include "llvm/Support/DynamicLibrary.h"
  33 #include "llvm/Support/ErrorHandling.h"
  34 using namespace clang;
  35 using namespace llvm::opt;
  36
  37 namespace clang {
  38
  39 static std::unique_ptr<FrontendAction>
  40 CreateFrontendBaseAction(CompilerInstance &CI) {
  41   using namespace clang::frontend;
  42   StringRef Action("unknown");
  43   (void)Action;
  44
  45   switch (CI.getFrontendOpts().ProgramAction) {
  46   case ASTDeclList:            return std::make_unique<ASTDeclListAction>();
  47   case ASTDump:                return std::make_unique<ASTDumpAction>();
  48   case ASTPrint:               return std::make_unique<ASTPrintAction>();
  49   case ASTView:                return std::make_unique<ASTViewAction>();
  50   case DumpCompilerOptions:
  51     return std::make_unique<DumpCompilerOptionsAction>();
  52   case DumpRawTokens:          return std::make_unique<DumpRawTokensAction>();
  53   case DumpTokens:             return std::make_unique<DumpTokensAction>();
  54   case EmitAssembly:           return std::make_unique<EmitAssemblyAction>();
  55   case EmitBC:                 return std::make_unique<EmitBCAction>();
  56   case EmitHTML:               return std::make_unique<HTMLPrintAction>();
  57   case EmitLLVM:               return std::make_unique<EmitLLVMAction>();
  58   case EmitLLVMOnly:           return std::make_unique<EmitLLVMOnlyAction>();
  59   case EmitCodeGenOnly:        return std::make_unique<EmitCodeGenOnlyAction>();
  60   case EmitObj:                return std::make_unique<EmitObjAction>();
  61   case ExtractAPI:
  62     return std::make_unique<ExtractAPIAction>();
  63   case FixIt:                  return std::make_unique<FixItAction>();
  64   case GenerateModule:
  65     return std::make_unique<GenerateModuleFromModuleMapAction>();
  66   case GenerateModuleInterface:
  67     return std::make_unique<GenerateModuleInterfaceAction>();
  68   case GenerateHeaderUnit:
  69     return std::make_unique<GenerateHeaderUnitAction>();
  70   case GeneratePCH:            return std::make_unique<GeneratePCHAction>();
  71   case GenerateInterfaceStubs:
  72     return std::make_unique<GenerateInterfaceStubsAction>();
  73   case InitOnly:               return std::make_unique<InitOnlyAction>();
  74   case ParseSyntaxOnly:        return std::make_unique<SyntaxOnlyAction>();
  75   case ModuleFileInfo:         return std::make_unique<DumpModuleInfoAction>();
  76   case VerifyPCH:              return std::make_unique<VerifyPCHAction>();
  77   case TemplightDump:          return std::make_unique<TemplightDumpAction>();
  78
  79   case PluginAction: {
  80     for (const FrontendPluginRegistry::entry &Plugin :
  81          FrontendPluginRegistry::entries()) {
  82       if (Plugin.getName() == CI.getFrontendOpts().ActionName) {
  83         std::unique_ptr<PluginASTAction> P(Plugin.instantiate());
  84         if ((P->getActionType() != PluginASTAction::ReplaceAction &&
  85              P->getActionType() != PluginASTAction::CmdlineAfterMainAction) ||
  86             !P->ParseArgs(
  87                 CI,
  88                 CI.getFrontendOpts().PluginArgs[std::string(Plugin.getName())]))
  89           return nullptr;
  90         return std::move(P);
  91       }
  92     }
  93
  94     CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
  95       << CI.getFrontendOpts().ActionName;
  96     return nullptr;
  97   }
  98
  99   case PrintPreamble:          return std::make_unique<PrintPreambleAction>();
 100   case PrintPreprocessedInput: {
 101     if (CI.getPreprocessorOutputOpts().RewriteIncludes ||
 102         CI.getPreprocessorOutputOpts().RewriteImports)
 103       return std::make_unique<RewriteIncludesAction>();
 104     return std::make_unique<PrintPreprocessedAction>();
 105   }
 106
 107   case RewriteMacros:          return std::make_unique<RewriteMacrosAction>();
 108   case RewriteTest:            return std::make_unique<RewriteTestAction>();
 109 #if CLANG_ENABLE_OBJC_REWRITER
 110   case RewriteObjC:            return std::make_unique<RewriteObjCAction>();
 111 #else
 112   case RewriteObjC:            Action = "RewriteObjC"; break;
 113 #endif
 114 #if CLANG_ENABLE_ARCMT
 115   case MigrateSource:
 116     return std::make_unique<arcmt::MigrateSourceAction>();
 117 #else
 118   case MigrateSource:          Action = "MigrateSource"; break;
 119 #endif
 120 #if CLANG_ENABLE_STATIC_ANALYZER
 121   case RunAnalysis:            return std::make_unique<ento::AnalysisAction>();
 122 #else
 123   case RunAnalysis:            Action = "RunAnalysis"; break;
 124 #endif
 125   case RunPreprocessorOnly:    return std::make_unique<PreprocessOnlyAction>();
 126   case PrintDependencyDirectivesSourceMinimizerOutput:
 127     return std::make_unique<PrintDependencyDirectivesSourceMinimizerAction>();
 128   }
 129
 130 #if !CLANG_ENABLE_ARCMT || !CLANG_ENABLE_STATIC_ANALYZER \
 131   || !CLANG_ENABLE_OBJC_REWRITER
 132   CI.getDiagnostics().Report(diag::err_fe_action_not_available) << Action;
 133   return 0;
 134 #else
 135   llvm_unreachable("Invalid program action!");
 136 #endif
 137 }
 138
 139 std::unique_ptr<FrontendAction>
 140 CreateFrontendAction(CompilerInstance &CI) {
 141   // Create the underlying action.
 142   std::unique_ptr<FrontendAction> Act = CreateFrontendBaseAction(CI);
 143   if (!Act)
 144     return nullptr;
 145
 146   const FrontendOptions &FEOpts = CI.getFrontendOpts();
 147
 148   if (FEOpts.FixAndRecompile) {
 149     Act = std::make_unique<FixItRecompile>(std::move(Act));
 150   }
 151
 152 #if CLANG_ENABLE_ARCMT
 153   if (CI.getFrontendOpts().ProgramAction != frontend::MigrateSource &&
 154       CI.getFrontendOpts().ProgramAction != frontend::GeneratePCH) {
 155     // Potentially wrap the base FE action in an ARC Migrate Tool action.
 156     switch (FEOpts.ARCMTAction) {
 157     case FrontendOptions::ARCMT_None:
 158       break;
 159     case FrontendOptions::ARCMT_Check:
 160       Act = std::make_unique<arcmt::CheckAction>(std::move(Act));
 161       break;
 162     case FrontendOptions::ARCMT_Modify:
 163       Act = std::make_unique<arcmt::ModifyAction>(std::move(Act));
 164       break;
 165     case FrontendOptions::ARCMT_Migrate:
 166       Act = std::make_unique<arcmt::MigrateAction>(std::move(Act),
 167                                      FEOpts.MTMigrateDir,
 168                                      FEOpts.ARCMTMigrateReportOut,
 169                                      FEOpts.ARCMTMigrateEmitARCErrors);
 170       break;
 171     }
 172
 173     if (FEOpts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
 174       Act = std::make_unique<arcmt::ObjCMigrateAction>(std::move(Act),
 175                                                         FEOpts.MTMigrateDir,
 176                                                         FEOpts.ObjCMTAction);
 177     }
 178   }
 179 #endif
 180
 181   // If there are any AST files to merge, create a frontend action
 182   // adaptor to perform the merge.
 183   if (!FEOpts.ASTMergeFiles.empty())
 184     Act = std::make_unique<ASTMergeAction>(std::move(Act),
 185                                             FEOpts.ASTMergeFiles);
 186
 187   return Act;
 188 }
 189
 190 bool ExecuteCompilerInvocation(CompilerInstance *Clang) {
 191   // Honor -help.
 192   if (Clang->getFrontendOpts().ShowHelp) {
 193     driver::getDriverOptTable().printHelp(
 194         llvm::outs(), "clang -cc1 [options] file...",
 195         "LLVM 'Clang' Compiler: http://clang.llvm.org",
 196         /*Include=*/driver::options::CC1Option,
 197         /*Exclude=*/0, /*ShowAllAliases=*/false);
 198     return true;
 199   }
 200
 201   // Honor -version.
 202   //
 203   // FIXME: Use a better -version message?
 204   if (Clang->getFrontendOpts().ShowVersion) {
 205     llvm::cl::PrintVersionMessage();
 206     return true;
 207   }
 208
 209   Clang->LoadRequestedPlugins();
 210
 211   // Honor -mllvm.
 212   //
 213   // FIXME: Remove this, one day.
 214   // This should happen AFTER plugins have been loaded!
 215   if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
 216     unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
 217     auto Args = std::make_unique<const char*[]>(NumArgs + 2);
 218     Args[0] = "clang (LLVM option parsing)";
 219     for (unsigned i = 0; i != NumArgs; ++i)
 220       Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
 221     Args[NumArgs + 1] = nullptr;
 222     llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args.get());
 223   }
 224
 225 #if CLANG_ENABLE_STATIC_ANALYZER
 226   // These should happen AFTER plugins have been loaded!
 227
 228   AnalyzerOptions &AnOpts = *Clang->getAnalyzerOpts();
 229
 230   // Honor -analyzer-checker-help and -analyzer-checker-help-hidden.
 231   if (AnOpts.ShowCheckerHelp || AnOpts.ShowCheckerHelpAlpha ||
 232       AnOpts.ShowCheckerHelpDeveloper) {
 233     ento::printCheckerHelp(llvm::outs(), *Clang);
 234     return true;
 235   }
 236
 237   // Honor -analyzer-checker-option-help.
 238   if (AnOpts.ShowCheckerOptionList || AnOpts.ShowCheckerOptionAlphaList ||
 239       AnOpts.ShowCheckerOptionDeveloperList) {
 240     ento::printCheckerConfigList(llvm::outs(), *Clang);
 241     return true;
 242   }
 243
 244   // Honor -analyzer-list-enabled-checkers.
 245   if (AnOpts.ShowEnabledCheckerList) {
 246     ento::printEnabledCheckerList(llvm::outs(), *Clang);
 247     return true;
 248   }
 249
 250   // Honor -analyzer-config-help.
 251   if (AnOpts.ShowConfigOptionsList) {
 252     ento::printAnalyzerConfigList(llvm::outs());
 253     return true;
 254   }
 255 #endif
 256
 257   // If there were errors in processing arguments, don't do anything else.
 258   if (Clang->getDiagnostics().hasErrorOccurred())
 259     return false;
 260   // Create and execute the frontend action.
 261   std::unique_ptr<FrontendAction> Act(CreateFrontendAction(*Clang));
 262   if (!Act)
 263     return false;
 264   bool Success = Clang->ExecuteAction(*Act);
 265   if (Clang->getFrontendOpts().DisableFree)
 266     llvm::BuryPointer(std::move(Act));
 267   return Success;
 268 }
 269
 270 } // namespace clang