| //===--- clang.cpp - C-Language Front-end ---------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This utility may be invoked in the following manner: |
| // clang-cc --help - Output help info. |
| // clang-cc [options] - Read from stdin. |
| // clang-cc [options] file - Read from "file". |
| // clang-cc [options] file1 file2 - Read these files. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Options.h" |
| #include "clang/Basic/Diagnostic.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Basic/Version.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/VerifyDiagnosticsClient.h" |
| #include "llvm/LLVMContext.h" |
| #include "llvm/ADT/OwningPtr.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/ManagedStatic.h" |
| #include "llvm/Support/PluginLoader.h" |
| #include "llvm/Support/PrettyStackTrace.h" |
| #include "llvm/Support/Timer.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/System/Host.h" |
| #include "llvm/System/Path.h" |
| #include "llvm/System/Signals.h" |
| #include "llvm/Target/TargetSelect.h" |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // Main driver |
| //===----------------------------------------------------------------------===// |
| |
| std::string GetBuiltinIncludePath(const char *Argv0) { |
| llvm::sys::Path P = |
| llvm::sys::Path::GetMainExecutable(Argv0, |
| (void*)(intptr_t) GetBuiltinIncludePath); |
| |
| if (!P.isEmpty()) { |
| P.eraseComponent(); // Remove /clang from foo/bin/clang |
| P.eraseComponent(); // Remove /bin from foo/bin |
| |
| // Get foo/lib/clang/<version>/include |
| P.appendComponent("lib"); |
| P.appendComponent("clang"); |
| P.appendComponent(CLANG_VERSION_STRING); |
| P.appendComponent("include"); |
| } |
| |
| return P.str(); |
| } |
| |
| static void LLVMErrorHandler(void *UserData, const std::string &Message) { |
| Diagnostic &Diags = *static_cast<Diagnostic*>(UserData); |
| |
| Diags.Report(diag::err_fe_error_backend) << Message; |
| |
| // We cannot recover from llvm errors. |
| exit(1); |
| } |
| |
| /// ClangFrontendTimer - The front-end activities should charge time to it with |
| /// TimeRegion. The -ftime-report option controls whether this will do |
| /// anything. |
| llvm::Timer *ClangFrontendTimer = 0; |
| |
| static FrontendAction *CreateFrontendAction(CompilerInstance &CI) { |
| using namespace clang::frontend; |
| |
| switch (CI.getFrontendOpts().ProgramAction) { |
| default: |
| llvm::llvm_unreachable("Invalid program action!"); |
| |
| case ASTDump: return new ASTDumpAction(); |
| case ASTPrint: return new ASTPrintAction(); |
| case ASTPrintXML: return new ASTPrintXMLAction(); |
| case ASTView: return new ASTViewAction(); |
| case DumpRawTokens: return new DumpRawTokensAction(); |
| case DumpRecordLayouts: return new DumpRecordAction(); |
| case DumpTokens: return new DumpTokensAction(); |
| case EmitAssembly: return new EmitAssemblyAction(); |
| case EmitBC: return new EmitBCAction(); |
| case EmitHTML: return new HTMLPrintAction(); |
| case EmitLLVM: return new EmitLLVMAction(); |
| case EmitLLVMOnly: return new EmitLLVMOnlyAction(); |
| case FixIt: return new FixItAction(); |
| case GeneratePCH: return new GeneratePCHAction(); |
| case GeneratePTH: return new GeneratePTHAction(); |
| case InheritanceView: return new InheritanceViewAction(); |
| case ParseNoop: return new ParseOnlyAction(); |
| case ParsePrintCallbacks: return new PrintParseAction(); |
| case ParseSyntaxOnly: return new SyntaxOnlyAction(); |
| |
| case PluginAction: { |
| if (CI.getFrontendOpts().ActionName == "help") { |
| llvm::errs() << "clang-cc plugins:\n"; |
| for (FrontendPluginRegistry::iterator it = |
| FrontendPluginRegistry::begin(), |
| ie = FrontendPluginRegistry::end(); |
| it != ie; ++it) |
| llvm::errs() << " " << it->getName() << " - " << it->getDesc() << "\n"; |
| exit(1); |
| } |
| |
| for (FrontendPluginRegistry::iterator it = |
| FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end(); |
| it != ie; ++it) { |
| if (it->getName() == CI.getFrontendOpts().ActionName) |
| return it->instantiate(); |
| } |
| |
| CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name) |
| << CI.getFrontendOpts().ActionName; |
| return 0; |
| } |
| |
| case PrintDeclContext: return new DeclContextPrintAction(); |
| case PrintPreprocessedInput: return new PrintPreprocessedAction(); |
| case RewriteBlocks: return new RewriteBlocksAction(); |
| case RewriteMacros: return new RewriteMacrosAction(); |
| case RewriteObjC: return new RewriteObjCAction(); |
| case RewriteTest: return new RewriteTestAction(); |
| case RunAnalysis: return new AnalysisAction(); |
| case RunPreprocessorOnly: return new PreprocessOnlyAction(); |
| } |
| } |
| |
| static TargetInfo * |
| ConstructCompilerInvocation(CompilerInvocation &Opts, Diagnostic &Diags, |
| const char *Argv0, bool &IsAST) { |
| // Initialize target options. |
| InitializeTargetOptions(Opts.getTargetOpts()); |
| |
| // Get information about the target being compiled for. |
| llvm::OwningPtr<TargetInfo> Target( |
| TargetInfo::CreateTargetInfo(Diags, Opts.getTargetOpts())); |
| if (!Target) |
| return 0; |
| |
| // Initialize frontend options. |
| InitializeFrontendOptions(Opts.getFrontendOpts()); |
| |
| // Determine the input language, we currently require all files to match. |
| FrontendOptions::InputKind IK = Opts.getFrontendOpts().Inputs[0].first; |
| for (unsigned i = 1, e = Opts.getFrontendOpts().Inputs.size(); i != e; ++i) { |
| if (Opts.getFrontendOpts().Inputs[i].first != IK) { |
| llvm::errs() << "error: cannot have multiple input files of distinct " |
| << "language kinds without -x\n"; |
| return 0; |
| } |
| } |
| |
| // Initialize language options. |
| // |
| // FIXME: These aren't used during operations on ASTs. Split onto a separate |
| // code path to make this obvious. |
| IsAST = (IK == FrontendOptions::IK_AST); |
| if (!IsAST) |
| InitializeLangOptions(Opts.getLangOpts(), IK, *Target); |
| |
| // Initialize the static analyzer options. |
| InitializeAnalyzerOptions(Opts.getAnalyzerOpts()); |
| |
| // Initialize the dependency output options (-M...). |
| InitializeDependencyOutputOptions(Opts.getDependencyOutputOpts()); |
| |
| // Initialize the header search options. |
| InitializeHeaderSearchOptions(Opts.getHeaderSearchOpts(), |
| GetBuiltinIncludePath(Argv0)); |
| |
| // Initialize the other preprocessor options. |
| InitializePreprocessorOptions(Opts.getPreprocessorOpts()); |
| |
| // Initialize the preprocessed output options. |
| InitializePreprocessorOutputOptions(Opts.getPreprocessorOutputOpts()); |
| |
| // Initialize backend options, which may also be used to key some language |
| // options. |
| InitializeCodeGenOptions(Opts.getCodeGenOpts(), Opts.getLangOpts(), |
| Opts.getFrontendOpts().ShowTimers); |
| |
| return Target.take(); |
| } |
| |
| int main(int argc, char **argv) { |
| llvm::sys::PrintStackTraceOnErrorSignal(); |
| llvm::PrettyStackTraceProgram X(argc, argv); |
| CompilerInstance Clang(&llvm::getGlobalContext(), false); |
| |
| // Initialize targets first, so that --version shows registered targets. |
| llvm::InitializeAllTargets(); |
| llvm::InitializeAllAsmPrinters(); |
| |
| llvm::cl::ParseCommandLineOptions(argc, argv, |
| "LLVM 'Clang' Compiler: http://clang.llvm.org\n"); |
| |
| // Construct the diagnostic engine first, so that we can build a diagnostic |
| // client to use for any errors during option handling. |
| InitializeDiagnosticOptions(Clang.getDiagnosticOpts()); |
| Clang.createDiagnostics(argc, argv); |
| if (!Clang.hasDiagnostics()) |
| return 1; |
| |
| // Set an error handler, so that any LLVM backend diagnostics go through our |
| // error handler. |
| llvm::llvm_install_error_handler(LLVMErrorHandler, |
| static_cast<void*>(&Clang.getDiagnostics())); |
| |
| // Now that we have initialized the diagnostics engine, create the target and |
| // the compiler invocation object. |
| // |
| // FIXME: We should move .ast inputs to taking a separate path, they are |
| // really quite different. |
| bool IsAST = false; |
| Clang.setTarget( |
| ConstructCompilerInvocation(Clang.getInvocation(), Clang.getDiagnostics(), |
| argv[0], IsAST)); |
| if (!Clang.hasTarget()) |
| return 1; |
| |
| // Validate/process some options |
| if (Clang.getHeaderSearchOpts().Verbose) |
| llvm::errs() << "clang-cc version " CLANG_VERSION_STRING |
| << " based upon " << PACKAGE_STRING |
| << " hosted on " << llvm::sys::getHostTriple() << "\n"; |
| |
| if (Clang.getFrontendOpts().ShowTimers) |
| ClangFrontendTimer = new llvm::Timer("Clang front-end time"); |
| |
| // Enforce certain implications. |
| if (!Clang.getFrontendOpts().ViewClassInheritance.empty()) |
| Clang.getFrontendOpts().ProgramAction = frontend::InheritanceView; |
| if (!Clang.getFrontendOpts().FixItLocations.empty()) |
| Clang.getFrontendOpts().ProgramAction = frontend::FixIt; |
| |
| for (unsigned i = 0, e = Clang.getFrontendOpts().Inputs.size(); i != e; ++i) { |
| const std::string &InFile = Clang.getFrontendOpts().Inputs[i].second; |
| |
| // If we aren't using an AST file, setup the file and source managers and |
| // the preprocessor. |
| if (!IsAST) { |
| if (!i) { |
| // Create a file manager object to provide access to and cache the |
| // filesystem. |
| Clang.createFileManager(); |
| |
| // Create the source manager. |
| Clang.createSourceManager(); |
| } else { |
| // Reset the ID tables if we are reusing the SourceManager. |
| Clang.getSourceManager().clearIDTables(); |
| } |
| |
| // Create the preprocessor. |
| Clang.createPreprocessor(); |
| } |
| |
| llvm::OwningPtr<FrontendAction> Act(CreateFrontendAction(Clang)); |
| if (!Act) |
| break; |
| |
| Act->setCurrentTimer(ClangFrontendTimer); |
| if (Act->BeginSourceFile(Clang, InFile, IsAST)) { |
| Act->Execute(); |
| Act->EndSourceFile(); |
| } |
| } |
| |
| if (Clang.getDiagnosticOpts().ShowCarets) |
| if (unsigned NumDiagnostics = Clang.getDiagnostics().getNumDiagnostics()) |
| fprintf(stderr, "%d diagnostic%s generated.\n", NumDiagnostics, |
| (NumDiagnostics == 1 ? "" : "s")); |
| |
| if (Clang.getFrontendOpts().ShowStats) { |
| Clang.getFileManager().PrintStats(); |
| fprintf(stderr, "\n"); |
| } |
| |
| delete ClangFrontendTimer; |
| |
| // Return the appropriate status when verifying diagnostics. |
| // |
| // FIXME: If we could make getNumErrors() do the right thing, we wouldn't need |
| // this. |
| if (Clang.getDiagnosticOpts().VerifyDiagnostics) |
| return static_cast<VerifyDiagnosticsClient&>( |
| Clang.getDiagnosticClient()).HadErrors(); |
| |
| // Managed static deconstruction. Useful for making things like |
| // -time-passes usable. |
| llvm::llvm_shutdown(); |
| |
| return (Clang.getDiagnostics().getNumErrors() != 0); |
| } |
| |