//===--- ExecuteCompilerInvocation.cpp ------------------------------------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// This file holds ExecuteCompilerInvocation(). It is split into its own file to

// minimize the impact of pulling in essentially everything else in Clang.

//

//===----------------------------------------------------------------------===//

#include "clang/ARCMigrate/ARCMTActions.h"

#include "clang/CodeGen/CodeGenAction.h"

#include "clang/Config/config.h"

#include "clang/Driver/Options.h"

#include "clang/Frontend/CompilerInstance.h"

#include "clang/Frontend/CompilerInvocation.h"

#include "clang/Frontend/FrontendActions.h"

#include "clang/Frontend/FrontendDiagnostic.h"

#include "clang/Frontend/FrontendPluginRegistry.h"

#include "clang/Frontend/Utils.h"

#include "clang/FrontendTool/Utils.h"

#include "clang/Rewrite/Frontend/FrontendActions.h"

#include "clang/StaticAnalyzer/Frontend/AnalyzerHelpFlags.h"

#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"

#include "llvm/Option/OptTable.h"

#include "llvm/Option/Option.h"

#include "llvm/Support/BuryPointer.h"

#include "llvm/Support/DynamicLibrary.h"

#include "llvm/Support/ErrorHandling.h"

using namespace clang;

using namespace llvm::opt;

namespace clang {

static std::unique_ptr<FrontendAction>

CreateFrontendBaseAction(CompilerInstance &CI) {

  using namespace clang::frontend;

  StringRef Action("unknown");

  (void)Action;

  switch (CI.getFrontendOpts().ProgramAction) {

  case ASTDeclList:            return std::make_unique<ASTDeclListAction>();

  case ASTDump:                return std::make_unique<ASTDumpAction>();

  case ASTPrint:               return std::make_unique<ASTPrintAction>();

  case ASTView:                return std::make_unique<ASTViewAction>();

  case DumpCompilerOptions:

    return std::make_unique<DumpCompilerOptionsAction>();

  case DumpRawTokens:          return std::make_unique<DumpRawTokensAction>();

  case DumpTokens:             return std::make_unique<DumpTokensAction>();

  case EmitAssembly:           return std::make_unique<EmitAssemblyAction>();

  case EmitBC:                 return std::make_unique<EmitBCAction>();

  case EmitHTML:               return std::make_unique<HTMLPrintAction>();

  case EmitLLVM:               return std::make_unique<EmitLLVMAction>();

  case EmitLLVMOnly:           return std::make_unique<EmitLLVMOnlyAction>();

  case EmitCodeGenOnly:        return std::make_unique<EmitCodeGenOnlyAction>();

  case EmitObj:                return std::make_unique<EmitObjAction>();

  case FixIt:                  return std::make_unique<FixItAction>();

  case GenerateModule:

    return std::make_unique<GenerateModuleFromModuleMapAction>();

  case GenerateModuleInterface:

    return std::make_unique<GenerateModuleInterfaceAction>();

  case GenerateHeaderModule:

    return std::make_unique<GenerateHeaderModuleAction>();

  case GeneratePCH:            return std::make_unique<GeneratePCHAction>();

  case GenerateInterfaceStubs:

    return std::make_unique<GenerateInterfaceStubsAction>();

  case InitOnly:               return std::make_unique<InitOnlyAction>();

  case ParseSyntaxOnly:        return std::make_unique<SyntaxOnlyAction>();

  case ModuleFileInfo:         return std::make_unique<DumpModuleInfoAction>();

  case VerifyPCH:              return std::make_unique<VerifyPCHAction>();

  case TemplightDump:          return std::make_unique<TemplightDumpAction>();

  case PluginAction: {

    for (const FrontendPluginRegistry::entry &Plugin :

         FrontendPluginRegistry::entries()) {

      if (Plugin.getName() == CI.getFrontendOpts().ActionName) {

        std::unique_ptr<PluginASTAction> P(Plugin.instantiate());

        if ((P->getActionType() != PluginASTAction::ReplaceAction &&

             P->getActionType() != PluginASTAction::Cmdline) ||

            !P->ParseArgs(

                CI,

                CI.getFrontendOpts().PluginArgs[std::string(Plugin.getName())]))

          return nullptr;

        return std::move(P);

      }

    }

    CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)

      << CI.getFrontendOpts().ActionName;

    return nullptr;

  }

  case PrintPreamble:          return std::make_unique<PrintPreambleAction>();

  case PrintPreprocessedInput: {

    if (CI.getPreprocessorOutputOpts().RewriteIncludes ||

        CI.getPreprocessorOutputOpts().RewriteImports)

      return std::make_unique<RewriteIncludesAction>();

    return std::make_unique<PrintPreprocessedAction>();

  }

  case RewriteMacros:          return std::make_unique<RewriteMacrosAction>();

  case RewriteTest:            return std::make_unique<RewriteTestAction>();

#if CLANG_ENABLE_OBJC_REWRITER

  case RewriteObjC:            return std::make_unique<RewriteObjCAction>();

#else

  case RewriteObjC:            Action = "RewriteObjC"; break;

#endif

#if CLANG_ENABLE_ARCMT

  case MigrateSource:

    return std::make_unique<arcmt::MigrateSourceAction>();

#else

  case MigrateSource:          Action = "MigrateSource"; break;

#endif

#if CLANG_ENABLE_STATIC_ANALYZER

  case RunAnalysis:            return std::make_unique<ento::AnalysisAction>();

#else

  case RunAnalysis:            Action = "RunAnalysis"; break;

#endif

  case RunPreprocessorOnly:    return std::make_unique<PreprocessOnlyAction>();

  case PrintDependencyDirectivesSourceMinimizerOutput:

    return std::make_unique<PrintDependencyDirectivesSourceMinimizerAction>();

  }

#if !CLANG_ENABLE_ARCMT || !CLANG_ENABLE_STATIC_ANALYZER \

  || !CLANG_ENABLE_OBJC_REWRITER

  CI.getDiagnostics().Report(diag::err_fe_action_not_available) << Action;

  return 0;

#else

  llvm_unreachable("Invalid program action!");

#endif

}

std::unique_ptr<FrontendAction>

CreateFrontendAction(CompilerInstance &CI) {

  // Create the underlying action.

  std::unique_ptr<FrontendAction> Act = CreateFrontendBaseAction(CI);

  if (!Act)

    return nullptr;

  const FrontendOptions &FEOpts = CI.getFrontendOpts();

  if (FEOpts.FixAndRecompile) {

    Act = std::make_unique<FixItRecompile>(std::move(Act));

  }

#if CLANG_ENABLE_ARCMT

  if (CI.getFrontendOpts().ProgramAction != frontend::MigrateSource &&

      CI.getFrontendOpts().ProgramAction != frontend::GeneratePCH) {

    // Potentially wrap the base FE action in an ARC Migrate Tool action.

    switch (FEOpts.ARCMTAction) {

    case FrontendOptions::ARCMT_None:

      break;

    case FrontendOptions::ARCMT_Check:

      Act = std::make_unique<arcmt::CheckAction>(std::move(Act));

      break;

    case FrontendOptions::ARCMT_Modify:

      Act = std::make_unique<arcmt::ModifyAction>(std::move(Act));

      break;

    case FrontendOptions::ARCMT_Migrate:

      Act = std::make_unique<arcmt::MigrateAction>(std::move(Act),

                                     FEOpts.MTMigrateDir,

                                     FEOpts.ARCMTMigrateReportOut,

                                     FEOpts.ARCMTMigrateEmitARCErrors);

      break;

    }

    if (FEOpts.ObjCMTAction != FrontendOptions::ObjCMT_None) {

      Act = std::make_unique<arcmt::ObjCMigrateAction>(std::move(Act),

                                                        FEOpts.MTMigrateDir,

                                                        FEOpts.ObjCMTAction);

    }

  }

#endif

  // If there are any AST files to merge, create a frontend action

  // adaptor to perform the merge.

  if (!FEOpts.ASTMergeFiles.empty())

    Act = std::make_unique<ASTMergeAction>(std::move(Act),

                                            FEOpts.ASTMergeFiles);

  return Act;

}

bool ExecuteCompilerInvocation(CompilerInstance *Clang) {

  // Honor -help.

  if (Clang->getFrontendOpts().ShowHelp) {

    driver::getDriverOptTable().PrintHelp(

        llvm::outs(), "clang -cc1 [options] file...",

        "LLVM 'Clang' Compiler: http://clang.llvm.org",

        /*Include=*/driver::options::CC1Option,

        /*Exclude=*/0, /*ShowAllAliases=*/false);

    return true;

  }

  // Honor -version.

  //

  // FIXME: Use a better -version message?

  if (Clang->getFrontendOpts().ShowVersion) {

    llvm::cl::PrintVersionMessage();

    return true;

  }

  // Load any requested plugins.

  for (const std::string &Path : Clang->getFrontendOpts().Plugins) {

    std::string Error;

    if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), &Error))

      Clang->getDiagnostics().Report(diag::err_fe_unable_to_load_plugin)

        << Path << Error;

  }

  // Check if any of the loaded plugins replaces the main AST action

  for (const FrontendPluginRegistry::entry &Plugin :

       FrontendPluginRegistry::entries()) {

    std::unique_ptr<PluginASTAction> P(Plugin.instantiate());

    if (P->getActionType() == PluginASTAction::ReplaceAction) {

      Clang->getFrontendOpts().ProgramAction = clang::frontend::PluginAction;

      Clang->getFrontendOpts().ActionName = Plugin.getName().str();

      break;

    }

  }

  // Honor -mllvm.

  //

  // FIXME: Remove this, one day.

  // This should happen AFTER plugins have been loaded!

  if (!Clang->getFrontendOpts().LLVMArgs.empty()) {

    unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();

    auto Args = std::make_unique<const char*[]>(NumArgs + 2);

    Args[0] = "clang (LLVM option parsing)";

    for (unsigned i = 0; i != NumArgs; 
++i39.1k
)

      Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();

    Args[NumArgs + 1] = nullptr;

    llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args.get());

  }

#if CLANG_ENABLE_STATIC_ANALYZER

  // These should happen AFTER plugins have been loaded!

  AnalyzerOptions &AnOpts = *Clang->getAnalyzerOpts();

  // Honor -analyzer-checker-help and -analyzer-checker-help-hidden.

  if (AnOpts.ShowCheckerHelp || 
AnOpts.ShowCheckerHelpAlpha39.0k
 ||

      AnOpts.ShowCheckerHelpDeveloper) {

    ento::printCheckerHelp(llvm::outs(), *Clang);

    return true;

  }

  // Honor -analyzer-checker-option-help.

  if (AnOpts.ShowCheckerOptionList || 
AnOpts.ShowCheckerOptionAlphaList38.9k
 ||

      AnOpts.ShowCheckerOptionDeveloperList) {

    ento::printCheckerConfigList(llvm::outs(), *Clang);

    return true;

  }

  // Honor -analyzer-list-enabled-checkers.

  if (AnOpts.ShowEnabledCheckerList) {

    ento::printEnabledCheckerList(llvm::outs(), *Clang);

    return true;

  }

  // Honor -analyzer-config-help.

  if (AnOpts.ShowConfigOptionsList) {

    ento::printAnalyzerConfigList(llvm::outs());

    return true;

  }

#endif

  // If there were errors in processing arguments, don't do anything else.

  if (Clang->getDiagnostics().hasErrorOccurred())

    return false;

  // Create and execute the frontend action.

  std::unique_ptr<FrontendAction> Act(CreateFrontendAction(*Clang));

  if (!Act)

    return false;

  bool Success = Clang->ExecuteAction(*Act);

  if (Clang->getFrontendOpts().DisableFree)

    llvm::BuryPointer(std::move(Act));

  return Success;

}

} // namespace clang