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 "llvm/LinkAllPasses.h" 34 #include <cstdio> 35 using namespace clang; 36 37 //===----------------------------------------------------------------------===// 38 // Main driver 39 //===----------------------------------------------------------------------===// 40 41 static void LLVMErrorHandler(void *UserData, const std::string &Message) { 42 DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData); 43 44 Diags.Report(diag::err_fe_error_backend) << Message; 45 46 // We cannot recover from llvm errors. 47 exit(1); 48 } 49 50 // FIXME: Define the need for this testing away. 51 static int cc1_test(DiagnosticsEngine &Diags, 52 const char **ArgBegin, const char **ArgEnd) { 53 using namespace clang::driver; 54 55 llvm::errs() << "cc1 argv:"; 56 for (const char **i = ArgBegin; i != ArgEnd; ++i) 57 llvm::errs() << " \"" << *i << '"'; 58 llvm::errs() << "\n"; 59 60 // Parse the arguments. 61 OptTable *Opts = createCC1OptTable(); 62 unsigned MissingArgIndex, MissingArgCount; 63 InputArgList *Args = Opts->ParseArgs(ArgBegin, ArgEnd, 64 MissingArgIndex, MissingArgCount); 65 66 // Check for missing argument error. 67 if (MissingArgCount) 68 Diags.Report(clang::diag::err_drv_missing_argument) 69 << Args->getArgString(MissingArgIndex) << MissingArgCount; 70 71 // Dump the parsed arguments. 72 llvm::errs() << "cc1 parsed options:\n"; 73 for (ArgList::const_iterator it = Args->begin(), ie = Args->end(); 74 it != ie; ++it) 75 (*it)->dump(); 76 77 // Create a compiler invocation. 78 llvm::errs() << "cc1 creating invocation.\n"; 79 CompilerInvocation Invocation; 80 if (!CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags)) 81 return 1; 82 83 // Convert the invocation back to argument strings. 84 std::vector<std::string> InvocationArgs; 85 Invocation.toArgs(InvocationArgs); 86 87 // Dump the converted arguments. 88 SmallVector<const char*, 32> Invocation2Args; 89 llvm::errs() << "invocation argv :"; 90 for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) { 91 Invocation2Args.push_back(InvocationArgs[i].c_str()); 92 llvm::errs() << " \"" << InvocationArgs[i] << '"'; 93 } 94 llvm::errs() << "\n"; 95 96 // Convert those arguments to another invocation, and check that we got the 97 // same thing. 98 CompilerInvocation Invocation2; 99 if (!CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(), 100 Invocation2Args.end(), Diags)) 101 return 1; 102 103 // FIXME: Implement CompilerInvocation comparison. 104 if (true) { 105 //llvm::errs() << "warning: Invocations differ!\n"; 106 107 std::vector<std::string> Invocation2Args; 108 Invocation2.toArgs(Invocation2Args); 109 llvm::errs() << "invocation2 argv:"; 110 for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i) 111 llvm::errs() << " \"" << Invocation2Args[i] << '"'; 112 llvm::errs() << "\n"; 113 } 114 115 return 0; 116 } 117 118 int cc1_main(const char **ArgBegin, const char **ArgEnd, 119 const char *Argv0, void *MainAddr) { 120 OwningPtr<CompilerInstance> Clang(new CompilerInstance()); 121 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 122 123 // Run clang -cc1 test. 124 if (ArgBegin != ArgEnd && StringRef(ArgBegin[0]) == "-cc1test") { 125 DiagnosticsEngine Diags(DiagID, new TextDiagnosticPrinter(llvm::errs(), 126 DiagnosticOptions())); 127 return cc1_test(Diags, ArgBegin + 1, ArgEnd); 128 } 129 130 // Initialize targets first, so that --version shows registered targets. 131 llvm::InitializeAllTargets(); 132 llvm::InitializeAllTargetMCs(); 133 llvm::InitializeAllAsmPrinters(); 134 llvm::InitializeAllAsmParsers(); 135 136 // Buffer diagnostics from argument parsing so that we can output them using a 137 // well formed diagnostic object. 138 TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer; 139 DiagnosticsEngine Diags(DiagID, DiagsBuffer); 140 bool Success; 141 Success = CompilerInvocation::CreateFromArgs(Clang->getInvocation(), 142 ArgBegin, ArgEnd, Diags); 143 144 // Infer the builtin include path if unspecified. 145 if (Clang->getHeaderSearchOpts().UseBuiltinIncludes && 146 Clang->getHeaderSearchOpts().ResourceDir.empty()) 147 Clang->getHeaderSearchOpts().ResourceDir = 148 CompilerInvocation::GetResourcesPath(Argv0, MainAddr); 149 150 // Create the actual diagnostics engine. 151 Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin)); 152 if (!Clang->hasDiagnostics()) 153 return 1; 154 155 // Set an error handler, so that any LLVM backend diagnostics go through our 156 // error handler. 157 llvm::install_fatal_error_handler(LLVMErrorHandler, 158 static_cast<void*>(&Clang->getDiagnostics())); 159 160 DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics()); 161 if (!Success) 162 return 1; 163 164 // Execute the frontend actions. 165 Success = ExecuteCompilerInvocation(Clang.get()); 166 167 // If any timers were active but haven't been destroyed yet, print their 168 // results now. This happens in -disable-free mode. 169 llvm::TimerGroup::printAll(llvm::errs()); 170 171 // Our error handler depends on the Diagnostics object, which we're 172 // potentially about to delete. Uninstall the handler now so that any 173 // later errors use the default handling behavior instead. 174 llvm::remove_fatal_error_handler(); 175 176 // When running with -disable-free, don't do any destruction or shutdown. 177 if (Clang->getFrontendOpts().DisableFree) { 178 if (llvm::AreStatisticsEnabled() || Clang->getFrontendOpts().ShowStats) 179 llvm::PrintStatistics(); 180 Clang.take(); 181 return !Success; 182 } 183 184 // Managed static deconstruction. Useful for making things like 185 // -time-passes usable. 186 llvm::llvm_shutdown(); 187 188 return !Success; 189 } 190
