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 "clang/Driver/Arg.h" 17 #include "clang/Driver/ArgList.h" 18 #include "clang/Driver/CC1Options.h" 19 #include "clang/Driver/DriverDiagnostic.h" 20 #include "clang/Driver/OptTable.h" 21 #include "clang/Frontend/CompilerInstance.h" 22 #include "clang/Frontend/CompilerInvocation.h" 23 #include "clang/Frontend/FrontendDiagnostic.h" 24 #include "clang/Frontend/TextDiagnosticBuffer.h" 25 #include "clang/Frontend/TextDiagnosticPrinter.h" 26 #include "clang/FrontendTool/Utils.h" 27 #include "llvm/ADT/Statistic.h" 28 #include "llvm/Support/ErrorHandling.h" 29 #include "llvm/Support/ManagedStatic.h" 30 #include "llvm/Support/TargetSelect.h" 31 #include "llvm/Support/Timer.h" 32 #include "llvm/Support/raw_ostream.h" 33 #include <cstdio> 34 using namespace clang; 35 36 //===----------------------------------------------------------------------===// 37 // Main driver 38 //===----------------------------------------------------------------------===// 39 40 static void LLVMErrorHandler(void *UserData, const std::string &Message) { 41 DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData); 42 43 Diags.Report(diag::err_fe_error_backend) << Message; 44 45 // We cannot recover from llvm errors. 46 exit(1); 47 } 48 49 // FIXME: Define the need for this testing away. 50 static int cc1_test(DiagnosticsEngine &Diags, 51 const char **ArgBegin, const char **ArgEnd) { 52 using namespace clang::driver; 53 54 llvm::errs() << "cc1 argv:"; 55 for (const char **i = ArgBegin; i != ArgEnd; ++i) 56 llvm::errs() << " \"" << *i << '"'; 57 llvm::errs() << "\n"; 58 59 // Parse the arguments. 60 OptTable *Opts = createCC1OptTable(); 61 unsigned MissingArgIndex, MissingArgCount; 62 InputArgList *Args = Opts->ParseArgs(ArgBegin, ArgEnd, 63 MissingArgIndex, MissingArgCount); 64 65 // Check for missing argument error. 66 if (MissingArgCount) 67 Diags.Report(clang::diag::err_drv_missing_argument) 68 << Args->getArgString(MissingArgIndex) << MissingArgCount; 69 70 // Dump the parsed arguments. 71 llvm::errs() << "cc1 parsed options:\n"; 72 for (ArgList::const_iterator it = Args->begin(), ie = Args->end(); 73 it != ie; ++it) 74 (*it)->dump(); 75 76 // Create a compiler invocation. 77 llvm::errs() << "cc1 creating invocation.\n"; 78 CompilerInvocation Invocation; 79 CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags); 80 81 // Convert the invocation back to argument strings. 82 std::vector<std::string> InvocationArgs; 83 Invocation.toArgs(InvocationArgs); 84 85 // Dump the converted arguments. 86 SmallVector<const char*, 32> Invocation2Args; 87 llvm::errs() << "invocation argv :"; 88 for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) { 89 Invocation2Args.push_back(InvocationArgs[i].c_str()); 90 llvm::errs() << " \"" << InvocationArgs[i] << '"'; 91 } 92 llvm::errs() << "\n"; 93 94 // Convert those arguments to another invocation, and check that we got the 95 // same thing. 96 CompilerInvocation Invocation2; 97 CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(), 98 Invocation2Args.end(), Diags); 99 100 // FIXME: Implement CompilerInvocation comparison. 101 if (true) { 102 //llvm::errs() << "warning: Invocations differ!\n"; 103 104 std::vector<std::string> Invocation2Args; 105 Invocation2.toArgs(Invocation2Args); 106 llvm::errs() << "invocation2 argv:"; 107 for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i) 108 llvm::errs() << " \"" << Invocation2Args[i] << '"'; 109 llvm::errs() << "\n"; 110 } 111 112 return 0; 113 } 114 115 int cc1_main(const char **ArgBegin, const char **ArgEnd, 116 const char *Argv0, void *MainAddr) { 117 llvm::OwningPtr<CompilerInstance> Clang(new CompilerInstance()); 118 llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 119 120 // Run clang -cc1 test. 121 if (ArgBegin != ArgEnd && StringRef(ArgBegin[0]) == "-cc1test") { 122 DiagnosticsEngine Diags(DiagID, new TextDiagnosticPrinter(llvm::errs(), 123 DiagnosticOptions())); 124 return cc1_test(Diags, ArgBegin + 1, ArgEnd); 125 } 126 127 // Initialize targets first, so that --version shows registered targets. 128 llvm::InitializeAllTargets(); 129 llvm::InitializeAllTargetMCs(); 130 llvm::InitializeAllAsmPrinters(); 131 llvm::InitializeAllAsmParsers(); 132 133 // Buffer diagnostics from argument parsing so that we can output them using a 134 // well formed diagnostic object. 135 TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer; 136 DiagnosticsEngine Diags(DiagID, DiagsBuffer); 137 CompilerInvocation::CreateFromArgs(Clang->getInvocation(), ArgBegin, ArgEnd, 138 Diags); 139 140 // Infer the builtin include path if unspecified. 141 if (Clang->getHeaderSearchOpts().UseBuiltinIncludes && 142 Clang->getHeaderSearchOpts().ResourceDir.empty()) 143 Clang->getHeaderSearchOpts().ResourceDir = 144 CompilerInvocation::GetResourcesPath(Argv0, MainAddr); 145 146 // Create the actual diagnostics engine. 147 Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin)); 148 if (!Clang->hasDiagnostics()) 149 return 1; 150 151 // Set an error handler, so that any LLVM backend diagnostics go through our 152 // error handler. 153 llvm::install_fatal_error_handler(LLVMErrorHandler, 154 static_cast<void*>(&Clang->getDiagnostics())); 155 156 DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics()); 157 158 // Execute the frontend actions. 159 bool Success = ExecuteCompilerInvocation(Clang.get()); 160 161 // If any timers were active but haven't been destroyed yet, print their 162 // results now. This happens in -disable-free mode. 163 llvm::TimerGroup::printAll(llvm::errs()); 164 165 // Our error handler depends on the Diagnostics object, which we're 166 // potentially about to delete. Uninstall the handler now so that any 167 // later errors use the default handling behavior instead. 168 llvm::remove_fatal_error_handler(); 169 170 // When running with -disable-free, don't do any destruction or shutdown. 171 if (Clang->getFrontendOpts().DisableFree) { 172 if (llvm::AreStatisticsEnabled() || Clang->getFrontendOpts().ShowStats) 173 llvm::PrintStatistics(); 174 Clang.take(); 175 return !Success; 176 } 177 178 // Managed static deconstruction. Useful for making things like 179 // -time-passes usable. 180 llvm::llvm_shutdown(); 181 182 return !Success; 183 } 184
