cc1_main.cpp revision 96b1d4b4eb6b18dd6df7a2c0833332b45840580f
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/LLVMContext.h" 28#include "llvm/ADT/Statistic.h" 29#include "llvm/Support/ErrorHandling.h" 30#include "llvm/Support/ManagedStatic.h" 31#include "llvm/Support/Timer.h" 32#include "llvm/Support/raw_ostream.h" 33#include "llvm/Target/TargetSelect.h" 34#include <cstdio> 35using namespace clang; 36 37//===----------------------------------------------------------------------===// 38// Main driver 39//===----------------------------------------------------------------------===// 40 41static void LLVMErrorHandler(void *UserData, const std::string &Message) { 42 Diagnostic &Diags = *static_cast<Diagnostic*>(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. 51static int cc1_test(Diagnostic &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 CompilerInvocation::CreateFromArgs(Invocation, ArgBegin, ArgEnd, Diags); 81 82 // Convert the invocation back to argument strings. 83 std::vector<std::string> InvocationArgs; 84 Invocation.toArgs(InvocationArgs); 85 86 // Dump the converted arguments. 87 llvm::SmallVector<const char*, 32> Invocation2Args; 88 llvm::errs() << "invocation argv :"; 89 for (unsigned i = 0, e = InvocationArgs.size(); i != e; ++i) { 90 Invocation2Args.push_back(InvocationArgs[i].c_str()); 91 llvm::errs() << " \"" << InvocationArgs[i] << '"'; 92 } 93 llvm::errs() << "\n"; 94 95 // Convert those arguments to another invocation, and check that we got the 96 // same thing. 97 CompilerInvocation Invocation2; 98 CompilerInvocation::CreateFromArgs(Invocation2, Invocation2Args.begin(), 99 Invocation2Args.end(), Diags); 100 101 // FIXME: Implement CompilerInvocation comparison. 102 if (true) { 103 //llvm::errs() << "warning: Invocations differ!\n"; 104 105 std::vector<std::string> Invocation2Args; 106 Invocation2.toArgs(Invocation2Args); 107 llvm::errs() << "invocation2 argv:"; 108 for (unsigned i = 0, e = Invocation2Args.size(); i != e; ++i) 109 llvm::errs() << " \"" << Invocation2Args[i] << '"'; 110 llvm::errs() << "\n"; 111 } 112 113 return 0; 114} 115 116int cc1_main(const char **ArgBegin, const char **ArgEnd, 117 const char *Argv0, void *MainAddr) { 118 llvm::OwningPtr<CompilerInstance> Clang(new CompilerInstance()); 119 llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 120 121 Clang->setLLVMContext(new llvm::LLVMContext()); 122 123 // Run clang -cc1 test. 124 if (ArgBegin != ArgEnd && llvm::StringRef(ArgBegin[0]) == "-cc1test") { 125 Diagnostic 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::InitializeAllAsmPrinters(); 133 llvm::InitializeAllAsmParsers(); 134 135 // Buffer diagnostics from argument parsing so that we can output them using a 136 // well formed diagnostic object. 137 TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer; 138 Diagnostic Diags(DiagID, DiagsBuffer); 139 CompilerInvocation::CreateFromArgs(Clang->getInvocation(), ArgBegin, ArgEnd, 140 Diags); 141 142 // Infer the builtin include path if unspecified. 143 if (Clang->getHeaderSearchOpts().UseBuiltinIncludes && 144 Clang->getHeaderSearchOpts().ResourceDir.empty()) 145 Clang->getHeaderSearchOpts().ResourceDir = 146 CompilerInvocation::GetResourcesPath(Argv0, MainAddr); 147 148 // Create the actual diagnostics engine. 149 Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin)); 150 if (!Clang->hasDiagnostics()) 151 return 1; 152 153 // Set an error handler, so that any LLVM backend diagnostics go through our 154 // error handler. 155 llvm::install_fatal_error_handler(LLVMErrorHandler, 156 static_cast<void*>(&Clang->getDiagnostics())); 157 158 DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics()); 159 160 // Execute the frontend actions. 161 bool Success = ExecuteCompilerInvocation(Clang.get()); 162 163 // If any timers were active but haven't been destroyed yet, print their 164 // results now. This happens in -disable-free mode. 165 llvm::TimerGroup::printAll(llvm::errs()); 166 167 // Our error handler depends on the Diagnostics object, which we're 168 // potentially about to delete. Uninstall the handler now so that any 169 // later errors use the default handling behavior instead. 170 llvm::remove_fatal_error_handler(); 171 172 // When running with -disable-free, don't do any destruction or shutdown. 173 if (Clang->getFrontendOpts().DisableFree) { 174 if (Clang->getFrontendOpts().ShowStats) 175 llvm::PrintStatistics(); 176 Clang.take(); 177 return !Success; 178 } 179 180 // Managed static deconstruction. Useful for making things like 181 // -time-passes usable. 182 llvm::llvm_shutdown(); 183 184 return !Success; 185} 186