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> 38using namespace clang; 39using namespace llvm::opt; 40 41//===----------------------------------------------------------------------===// 42// Main driver 43//===----------------------------------------------------------------------===// 44 45static 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 62namespace polly { 63void initializePollyPasses(llvm::PassRegistry &Registry); 64} 65#endif 66 67int 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