1 //===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This is the entry point to the clang -cc1 functionality, which implements the 11 // core compiler functionality along with a number of additional tools for 12 // demonstration and testing purposes. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "llvm/Option/Arg.h" 17 #include "clang/CodeGen/ObjectFilePCHContainerOperations.h" 18 #include "clang/Driver/DriverDiagnostic.h" 19 #include "clang/Driver/Options.h" 20 #include "clang/Frontend/CompilerInstance.h" 21 #include "clang/Frontend/CompilerInvocation.h" 22 #include "clang/Frontend/FrontendDiagnostic.h" 23 #include "clang/Frontend/TextDiagnosticBuffer.h" 24 #include "clang/Frontend/TextDiagnosticPrinter.h" 25 #include "clang/Frontend/Utils.h" 26 #include "clang/FrontendTool/Utils.h" 27 #include "llvm/ADT/Statistic.h" 28 #include "llvm/LinkAllPasses.h" 29 #include "llvm/Option/ArgList.h" 30 #include "llvm/Option/OptTable.h" 31 #include "llvm/Support/ErrorHandling.h" 32 #include "llvm/Support/ManagedStatic.h" 33 #include "llvm/Support/Signals.h" 34 #include "llvm/Support/TargetSelect.h" 35 #include "llvm/Support/Timer.h" 36 #include "llvm/Support/raw_ostream.h" 37 #include <cstdio> 38 using namespace clang; 39 using namespace llvm::opt; 40 41 //===----------------------------------------------------------------------===// 42 // Main driver 43 //===----------------------------------------------------------------------===// 44 45 static void LLVMErrorHandler(void *UserData, const std::string &Message, 46 bool GenCrashDiag) { 47 DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData); 48 49 Diags.Report(diag::err_fe_error_backend) << Message; 50 51 // Run the interrupt handlers to make sure any special cleanups get done, in 52 // particular that we remove files registered with RemoveFileOnSignal. 53 llvm::sys::RunInterruptHandlers(); 54 55 // We cannot recover from llvm errors. When reporting a fatal error, exit 56 // with status 70 to generate crash diagnostics. For BSD systems this is 57 // defined as an internal software error. Otherwise, exit with status 1. 58 exit(GenCrashDiag ? 70 : 1); 59 } 60 61 #ifdef LINK_POLLY_INTO_TOOLS 62 namespace polly { 63 void initializePollyPasses(llvm::PassRegistry &Registry); 64 } 65 #endif 66 67 int cc1_main(ArrayRef<const char *> Argv, const char *Argv0, void *MainAddr) { 68 std::unique_ptr<CompilerInstance> Clang(new CompilerInstance()); 69 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 70 71 // Register the support for object-file-wrapped Clang modules. 72 auto PCHOps = Clang->getPCHContainerOperations(); 73 PCHOps->registerWriter(llvm::make_unique<ObjectFilePCHContainerWriter>()); 74 PCHOps->registerReader(llvm::make_unique<ObjectFilePCHContainerReader>()); 75 76 // Initialize targets first, so that --version shows registered targets. 77 llvm::InitializeAllTargets(); 78 llvm::InitializeAllTargetMCs(); 79 llvm::InitializeAllAsmPrinters(); 80 llvm::InitializeAllAsmParsers(); 81 82 #ifdef LINK_POLLY_INTO_TOOLS 83 llvm::PassRegistry &Registry = *llvm::PassRegistry::getPassRegistry(); 84 polly::initializePollyPasses(Registry); 85 #endif 86 87 // Buffer diagnostics from argument parsing so that we can output them using a 88 // well formed diagnostic object. 89 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions(); 90 TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer; 91 DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagsBuffer); 92 bool Success = CompilerInvocation::CreateFromArgs( 93 Clang->getInvocation(), Argv.begin(), Argv.end(), Diags); 94 95 // Infer the builtin include path if unspecified. 96 if (Clang->getHeaderSearchOpts().UseBuiltinIncludes && 97 Clang->getHeaderSearchOpts().ResourceDir.empty()) 98 Clang->getHeaderSearchOpts().ResourceDir = 99 CompilerInvocation::GetResourcesPath(Argv0, MainAddr); 100 101 // Create the actual diagnostics engine. 102 Clang->createDiagnostics(); 103 if (!Clang->hasDiagnostics()) 104 return 1; 105 106 // Set an error handler, so that any LLVM backend diagnostics go through our 107 // error handler. 108 llvm::install_fatal_error_handler(LLVMErrorHandler, 109 static_cast<void*>(&Clang->getDiagnostics())); 110 111 DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics()); 112 if (!Success) 113 return 1; 114 115 // Execute the frontend actions. 116 Success = ExecuteCompilerInvocation(Clang.get()); 117 118 // If any timers were active but haven't been destroyed yet, print their 119 // results now. This happens in -disable-free mode. 120 llvm::TimerGroup::printAll(llvm::errs()); 121 122 // Our error handler depends on the Diagnostics object, which we're 123 // potentially about to delete. Uninstall the handler now so that any 124 // later errors use the default handling behavior instead. 125 llvm::remove_fatal_error_handler(); 126 127 // When running with -disable-free, don't do any destruction or shutdown. 128 if (Clang->getFrontendOpts().DisableFree) { 129 BuryPointer(std::move(Clang)); 130 return !Success; 131 } 132 133 return !Success; 134 } 135
