1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 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 file implements the clang::InitializePreprocessor function. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Basic/Version.h" 15 #include "clang/Frontend/Utils.h" 16 #include "clang/Basic/MacroBuilder.h" 17 #include "clang/Basic/TargetInfo.h" 18 #include "clang/Frontend/FrontendDiagnostic.h" 19 #include "clang/Frontend/FrontendOptions.h" 20 #include "clang/Frontend/PreprocessorOptions.h" 21 #include "clang/Lex/Preprocessor.h" 22 #include "clang/Basic/FileManager.h" 23 #include "clang/Basic/SourceManager.h" 24 #include "llvm/ADT/APFloat.h" 25 #include "llvm/Support/FileSystem.h" 26 #include "llvm/Support/MemoryBuffer.h" 27 #include "llvm/Support/Path.h" 28 using namespace clang; 29 30 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 31 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 32 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 33 static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro, 34 Diagnostic &Diags) { 35 std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('='); 36 llvm::StringRef MacroName = MacroPair.first; 37 llvm::StringRef MacroBody = MacroPair.second; 38 if (MacroName.size() != Macro.size()) { 39 // Per GCC -D semantics, the macro ends at \n if it exists. 40 llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r"); 41 if (End != llvm::StringRef::npos) 42 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 43 << MacroName; 44 Builder.defineMacro(MacroName, MacroBody.substr(0, End)); 45 } else { 46 // Push "macroname 1". 47 Builder.defineMacro(Macro); 48 } 49 } 50 51 std::string clang::NormalizeDashIncludePath(llvm::StringRef File, 52 FileManager &FileMgr) { 53 // Implicit include paths should be resolved relative to the current 54 // working directory first, and then use the regular header search 55 // mechanism. The proper way to handle this is to have the 56 // predefines buffer located at the current working directory, but 57 // it has no file entry. For now, workaround this by using an 58 // absolute path if we find the file here, and otherwise letting 59 // header search handle it. 60 llvm::SmallString<128> Path(File); 61 llvm::sys::fs::make_absolute(Path); 62 bool exists; 63 if (llvm::sys::fs::exists(Path.str(), exists) || !exists) 64 Path = File; 65 else if (exists) 66 FileMgr.getFile(File); 67 68 return Lexer::Stringify(Path.str()); 69 } 70 71 /// AddImplicitInclude - Add an implicit #include of the specified file to the 72 /// predefines buffer. 73 static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File, 74 FileManager &FileMgr) { 75 Builder.append("#include \"" + 76 llvm::Twine(NormalizeDashIncludePath(File, FileMgr)) + "\""); 77 } 78 79 static void AddImplicitIncludeMacros(MacroBuilder &Builder, 80 llvm::StringRef File, 81 FileManager &FileMgr) { 82 Builder.append("#__include_macros \"" + 83 llvm::Twine(NormalizeDashIncludePath(File, FileMgr)) + "\""); 84 // Marker token to stop the __include_macros fetch loop. 85 Builder.append("##"); // ##? 86 } 87 88 /// AddImplicitIncludePTH - Add an implicit #include using the original file 89 /// used to generate a PTH cache. 90 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 91 llvm::StringRef ImplicitIncludePTH) { 92 PTHManager *P = PP.getPTHManager(); 93 // Null check 'P' in the corner case where it couldn't be created. 94 const char *OriginalFile = P ? P->getOriginalSourceFile() : 0; 95 96 if (!OriginalFile) { 97 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 98 << ImplicitIncludePTH; 99 return; 100 } 101 102 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager()); 103 } 104 105 /// PickFP - This is used to pick a value based on the FP semantics of the 106 /// specified FP model. 107 template <typename T> 108 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 109 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 110 T IEEEQuadVal) { 111 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 112 return IEEESingleVal; 113 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 114 return IEEEDoubleVal; 115 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 116 return X87DoubleExtendedVal; 117 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 118 return PPCDoubleDoubleVal; 119 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 120 return IEEEQuadVal; 121 } 122 123 static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix, 124 const llvm::fltSemantics *Sem) { 125 const char *DenormMin, *Epsilon, *Max, *Min; 126 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", 127 "3.64519953188247460253e-4951L", 128 "4.94065645841246544176568792868221e-324L", 129 "6.47517511943802511092443895822764655e-4966L"); 130 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 131 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", 132 "1.08420217248550443401e-19L", 133 "4.94065645841246544176568792868221e-324L", 134 "1.92592994438723585305597794258492732e-34L"); 135 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 136 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 137 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 138 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 139 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 140 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", 141 "3.36210314311209350626e-4932L", 142 "2.00416836000897277799610805135016e-292L", 143 "3.36210314311209350626267781732175260e-4932L"); 144 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", 145 "1.18973149535723176502e+4932L", 146 "1.79769313486231580793728971405301e+308L", 147 "1.18973149535723176508575932662800702e+4932L"); 148 149 llvm::SmallString<32> DefPrefix; 150 DefPrefix = "__"; 151 DefPrefix += Prefix; 152 DefPrefix += "_"; 153 154 Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin); 155 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 156 Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits)); 157 Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon)); 158 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 159 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 160 Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits)); 161 162 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp)); 163 Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp)); 164 Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max)); 165 166 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")"); 167 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")"); 168 Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min)); 169 } 170 171 172 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 173 /// named MacroName with the max value for a type with width 'TypeWidth' a 174 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 175 static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth, 176 llvm::StringRef ValSuffix, bool isSigned, 177 MacroBuilder &Builder) { 178 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 179 : llvm::APInt::getMaxValue(TypeWidth); 180 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 181 } 182 183 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 184 /// the width, suffix, and signedness of the given type 185 static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty, 186 const TargetInfo &TI, MacroBuilder &Builder) { 187 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 188 TI.isTypeSigned(Ty), Builder); 189 } 190 191 static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty, 192 MacroBuilder &Builder) { 193 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 194 } 195 196 static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty, 197 const TargetInfo &TI, MacroBuilder &Builder) { 198 Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty))); 199 } 200 201 static void DefineTypeSizeof(llvm::StringRef MacroName, unsigned BitWidth, 202 const TargetInfo &TI, MacroBuilder &Builder) { 203 Builder.defineMacro(MacroName, 204 llvm::Twine(BitWidth / TI.getCharWidth())); 205 } 206 207 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 208 const TargetInfo &TI, MacroBuilder &Builder) { 209 int TypeWidth = TI.getTypeWidth(Ty); 210 211 // Use the target specified int64 type, when appropriate, so that [u]int64_t 212 // ends up being defined in terms of the correct type. 213 if (TypeWidth == 64) 214 Ty = TI.getInt64Type(); 215 216 DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder); 217 218 llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty)); 219 if (!ConstSuffix.empty()) 220 Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__", 221 ConstSuffix); 222 } 223 224 /// \brief Add definitions required for a smooth interaction between 225 /// Objective-C++ automatic reference counting and libc++. 226 static void AddObjCXXARCLibcxxDefines(const LangOptions &LangOpts, 227 MacroBuilder &Builder) { 228 Builder.defineMacro("_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF"); 229 230 std::string Result; 231 { 232 // Provide overloads of the function std::__1::addressof() that accept 233 // references to lifetime-qualified objects. libc++'s (more general) 234 // std::__1::addressof() template fails to instantiate with such types, 235 // because it attempts to convert the object to a char& before 236 // dereferencing. 237 llvm::raw_string_ostream Out(Result); 238 239 Out << "#pragma clang diagnostic push\n" 240 << "#pragma clang diagnostic ignored \"-Wc++0x-extensions\"\n" 241 << "namespace std { inline namespace __1 {\n" 242 << "\n"; 243 244 Out << "template <class _Tp>\n" 245 << "inline __attribute__ ((__visibility__(\"hidden\"), " 246 << "__always_inline__))\n" 247 << "__attribute__((objc_lifetime(strong))) _Tp*\n" 248 << "addressof(__attribute__((objc_lifetime(strong))) _Tp& __x) {\n" 249 << " return &__x;\n" 250 << "}\n" 251 << "\n"; 252 253 if (!LangOpts.ObjCNoAutoRefCountRuntime) { 254 Out << "template <class _Tp>\n" 255 << "inline __attribute__ ((__visibility__(\"hidden\")," 256 << "__always_inline__))\n" 257 << "__attribute__((objc_lifetime(weak))) _Tp*\n" 258 << "addressof(__attribute__((objc_lifetime(weak))) _Tp& __x) {\n" 259 << " return &__x;\n" 260 << "};\n" 261 << "\n"; 262 } 263 264 Out << "template <class _Tp>\n" 265 << "inline __attribute__ ((__visibility__(\"hidden\")," 266 << "__always_inline__))\n" 267 << "__attribute__((objc_lifetime(autoreleasing))) _Tp*\n" 268 << "addressof(__attribute__((objc_lifetime(autoreleasing))) _Tp& __x) " 269 << "{\n" 270 << " return &__x;\n" 271 << "}\n" 272 << "\n"; 273 274 Out << "template <class _Tp>\n" 275 << "inline __attribute__ ((__visibility__(\"hidden\"), " 276 << "__always_inline__))\n" 277 << "__unsafe_unretained _Tp* addressof(__unsafe_unretained _Tp& __x)" 278 << " {\n" 279 << " return &__x;\n" 280 << "}\n"; 281 282 Out << "\n" 283 << "} }\n" 284 << "#pragma clang diagnostic pop\n" 285 << "\n"; 286 } 287 Builder.append(Result); 288 } 289 290 /// \brief Add definitions required for a smooth interaction between 291 /// Objective-C++ automated reference counting and libstdc++ (4.2). 292 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 293 MacroBuilder &Builder) { 294 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 295 296 std::string Result; 297 { 298 // Provide specializations for the __is_scalar type trait so that 299 // lifetime-qualified objects are not considered "scalar" types, which 300 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 301 // default-construct, and destruct semantics (none of which hold for 302 // lifetime-qualified objects in ARC). 303 llvm::raw_string_ostream Out(Result); 304 305 Out << "namespace std {\n" 306 << "\n" 307 << "struct __true_type;\n" 308 << "struct __false_type;\n" 309 << "\n"; 310 311 Out << "template<typename _Tp> struct __is_scalar;\n" 312 << "\n"; 313 314 Out << "template<typename _Tp>\n" 315 << "struct __is_scalar<__attribute__((objc_lifetime(strong))) _Tp> {\n" 316 << " enum { __value = 0 };\n" 317 << " typedef __false_type __type;\n" 318 << "};\n" 319 << "\n"; 320 321 if (!LangOpts.ObjCNoAutoRefCountRuntime) { 322 Out << "template<typename _Tp>\n" 323 << "struct __is_scalar<__attribute__((objc_lifetime(weak))) _Tp> {\n" 324 << " enum { __value = 0 };\n" 325 << " typedef __false_type __type;\n" 326 << "};\n" 327 << "\n"; 328 } 329 330 Out << "template<typename _Tp>\n" 331 << "struct __is_scalar<__attribute__((objc_lifetime(autoreleasing)))" 332 << " _Tp> {\n" 333 << " enum { __value = 0 };\n" 334 << " typedef __false_type __type;\n" 335 << "};\n" 336 << "\n"; 337 338 Out << "}\n"; 339 } 340 Builder.append(Result); 341 } 342 343 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 344 const LangOptions &LangOpts, 345 const FrontendOptions &FEOpts, 346 MacroBuilder &Builder) { 347 if (!LangOpts.Microsoft && !LangOpts.TraditionalCPP) 348 Builder.defineMacro("__STDC__"); 349 if (LangOpts.Freestanding) 350 Builder.defineMacro("__STDC_HOSTED__", "0"); 351 else 352 Builder.defineMacro("__STDC_HOSTED__"); 353 354 if (!LangOpts.CPlusPlus) { 355 if (LangOpts.C99) 356 Builder.defineMacro("__STDC_VERSION__", "199901L"); 357 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 358 Builder.defineMacro("__STDC_VERSION__", "199409L"); 359 } else { 360 if (LangOpts.GNUMode) 361 Builder.defineMacro("__cplusplus"); 362 else 363 // C++ [cpp.predefined]p1: 364 // The name_ _cplusplus is defined to the value 199711L when compiling a 365 // C++ translation unit. 366 Builder.defineMacro("__cplusplus", "199711L"); 367 } 368 369 if (LangOpts.ObjC1) 370 Builder.defineMacro("__OBJC__"); 371 372 // Not "standard" per se, but available even with the -undef flag. 373 if (LangOpts.AsmPreprocessor) 374 Builder.defineMacro("__ASSEMBLER__"); 375 } 376 377 static void InitializePredefinedMacros(const TargetInfo &TI, 378 const LangOptions &LangOpts, 379 const FrontendOptions &FEOpts, 380 MacroBuilder &Builder) { 381 // Compiler version introspection macros. 382 Builder.defineMacro("__llvm__"); // LLVM Backend 383 Builder.defineMacro("__clang__"); // Clang Frontend 384 #define TOSTR2(X) #X 385 #define TOSTR(X) TOSTR2(X) 386 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 387 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 388 #ifdef CLANG_VERSION_PATCHLEVEL 389 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 390 #else 391 Builder.defineMacro("__clang_patchlevel__", "0"); 392 #endif 393 Builder.defineMacro("__clang_version__", 394 "\"" CLANG_VERSION_STRING " (" 395 + getClangFullRepositoryVersion() + ")\""); 396 #undef TOSTR 397 #undef TOSTR2 398 // Currently claim to be compatible with GCC 4.2.1-5621. 399 Builder.defineMacro("__GNUC_MINOR__", "2"); 400 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 401 Builder.defineMacro("__GNUC__", "4"); 402 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 403 404 // As sad as it is, enough software depends on the __VERSION__ for version 405 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 406 // compatibility with) first. 407 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 408 llvm::Twine(getClangFullCPPVersion()) + "\""); 409 410 // Initialize language-specific preprocessor defines. 411 412 // Standard conforming mode? 413 if (!LangOpts.GNUMode) 414 Builder.defineMacro("__STRICT_ANSI__"); 415 416 if (LangOpts.CPlusPlus0x) 417 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 418 419 if (LangOpts.ObjC1) { 420 if (LangOpts.ObjCNonFragileABI) { 421 Builder.defineMacro("__OBJC2__"); 422 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 423 } 424 425 if (LangOpts.getGCMode() != LangOptions::NonGC) 426 Builder.defineMacro("__OBJC_GC__"); 427 428 if (LangOpts.NeXTRuntime) 429 Builder.defineMacro("__NEXT_RUNTIME__"); 430 } 431 432 // darwin_constant_cfstrings controls this. This is also dependent 433 // on other things like the runtime I believe. This is set even for C code. 434 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 435 436 if (LangOpts.ObjC2) 437 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 438 439 if (LangOpts.PascalStrings) 440 Builder.defineMacro("__PASCAL_STRINGS__"); 441 442 if (LangOpts.Blocks) { 443 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 444 Builder.defineMacro("__BLOCKS__"); 445 } 446 447 if (LangOpts.Exceptions) 448 Builder.defineMacro("__EXCEPTIONS"); 449 if (LangOpts.RTTI) 450 Builder.defineMacro("__GXX_RTTI"); 451 if (LangOpts.SjLjExceptions) 452 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 453 454 if (LangOpts.Deprecated) 455 Builder.defineMacro("__DEPRECATED"); 456 457 if (LangOpts.CPlusPlus) { 458 Builder.defineMacro("__GNUG__", "4"); 459 Builder.defineMacro("__GXX_WEAK__"); 460 Builder.defineMacro("__private_extern__", "extern"); 461 } 462 463 if (LangOpts.Microsoft) { 464 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however 465 // VC++ appears to only like __FUNCTION__. 466 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__"); 467 // Work around some issues with Visual C++ headerws. 468 if (LangOpts.CPlusPlus) { 469 // Since we define wchar_t in C++ mode. 470 Builder.defineMacro("_WCHAR_T_DEFINED"); 471 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 472 // FIXME: Support Microsoft's __identifier extension in the lexer. 473 Builder.append("#define __identifier(x) x"); 474 Builder.append("class type_info;"); 475 } 476 477 if (LangOpts.CPlusPlus0x) { 478 Builder.defineMacro("_HAS_CHAR16_T_LANGUAGE_SUPPORT", "1"); 479 } 480 } 481 482 if (LangOpts.Optimize) 483 Builder.defineMacro("__OPTIMIZE__"); 484 if (LangOpts.OptimizeSize) 485 Builder.defineMacro("__OPTIMIZE_SIZE__"); 486 487 // Initialize target-specific preprocessor defines. 488 489 // Define type sizing macros based on the target properties. 490 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 491 Builder.defineMacro("__CHAR_BIT__", "8"); 492 493 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder); 494 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 495 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 496 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 497 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 498 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 499 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 500 501 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 502 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 503 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 504 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 505 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 506 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 507 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 508 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 509 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 510 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 511 DefineTypeSizeof("__SIZEOF_SIZE_T__", 512 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 513 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 514 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 515 DefineTypeSizeof("__SIZEOF_WINT_T__", 516 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 517 518 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 519 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 520 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 521 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 522 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 523 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 524 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 525 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 526 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 527 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 528 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 529 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 530 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 531 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 532 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 533 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 534 535 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat()); 536 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat()); 537 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat()); 538 539 // Define a __POINTER_WIDTH__ macro for stdint.h. 540 Builder.defineMacro("__POINTER_WIDTH__", 541 llvm::Twine((int)TI.getPointerWidth(0))); 542 543 if (!LangOpts.CharIsSigned) 544 Builder.defineMacro("__CHAR_UNSIGNED__"); 545 546 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 547 Builder.defineMacro("__WINT_UNSIGNED__"); 548 549 // Define exact-width integer types for stdint.h 550 Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__", 551 "char"); 552 553 if (TI.getShortWidth() > TI.getCharWidth()) 554 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 555 556 if (TI.getIntWidth() > TI.getShortWidth()) 557 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 558 559 if (TI.getLongWidth() > TI.getIntWidth()) 560 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 561 562 if (TI.getLongLongWidth() > TI.getLongWidth()) 563 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 564 565 // Add __builtin_va_list typedef. 566 Builder.append(TI.getVAListDeclaration()); 567 568 if (const char *Prefix = TI.getUserLabelPrefix()) 569 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 570 571 // Build configuration options. FIXME: these should be controlled by 572 // command line options or something. 573 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 574 575 if (LangOpts.GNUInline) 576 Builder.defineMacro("__GNUC_GNU_INLINE__"); 577 else 578 Builder.defineMacro("__GNUC_STDC_INLINE__"); 579 580 if (LangOpts.NoInline) 581 Builder.defineMacro("__NO_INLINE__"); 582 583 if (unsigned PICLevel = LangOpts.PICLevel) { 584 Builder.defineMacro("__PIC__", llvm::Twine(PICLevel)); 585 Builder.defineMacro("__pic__", llvm::Twine(PICLevel)); 586 } 587 588 // Macros to control C99 numerics and <float.h> 589 Builder.defineMacro("__FLT_EVAL_METHOD__", "0"); 590 Builder.defineMacro("__FLT_RADIX__", "2"); 591 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); 592 Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig)); 593 594 if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn) 595 Builder.defineMacro("__SSP__"); 596 else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq) 597 Builder.defineMacro("__SSP_ALL__", "2"); 598 599 if (FEOpts.ProgramAction == frontend::RewriteObjC) 600 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 601 602 // Define a macro that exists only when using the static analyzer. 603 if (FEOpts.ProgramAction == frontend::RunAnalysis) 604 Builder.defineMacro("__clang_analyzer__"); 605 606 if (LangOpts.FastRelaxedMath) 607 Builder.defineMacro("__FAST_RELAXED_MATH__"); 608 609 // Get other target #defines. 610 TI.getTargetDefines(LangOpts, Builder); 611 } 612 613 // Initialize the remapping of files to alternative contents, e.g., 614 // those specified through other files. 615 static void InitializeFileRemapping(Diagnostic &Diags, 616 SourceManager &SourceMgr, 617 FileManager &FileMgr, 618 const PreprocessorOptions &InitOpts) { 619 // Remap files in the source manager (with buffers). 620 for (PreprocessorOptions::const_remapped_file_buffer_iterator 621 Remap = InitOpts.remapped_file_buffer_begin(), 622 RemapEnd = InitOpts.remapped_file_buffer_end(); 623 Remap != RemapEnd; 624 ++Remap) { 625 // Create the file entry for the file that we're mapping from. 626 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, 627 Remap->second->getBufferSize(), 628 0); 629 if (!FromFile) { 630 Diags.Report(diag::err_fe_remap_missing_from_file) 631 << Remap->first; 632 if (!InitOpts.RetainRemappedFileBuffers) 633 delete Remap->second; 634 continue; 635 } 636 637 // Override the contents of the "from" file with the contents of 638 // the "to" file. 639 SourceMgr.overrideFileContents(FromFile, Remap->second, 640 InitOpts.RetainRemappedFileBuffers); 641 } 642 643 // Remap files in the source manager (with other files). 644 for (PreprocessorOptions::const_remapped_file_iterator 645 Remap = InitOpts.remapped_file_begin(), 646 RemapEnd = InitOpts.remapped_file_end(); 647 Remap != RemapEnd; 648 ++Remap) { 649 // Find the file that we're mapping to. 650 const FileEntry *ToFile = FileMgr.getFile(Remap->second); 651 if (!ToFile) { 652 Diags.Report(diag::err_fe_remap_missing_to_file) 653 << Remap->first << Remap->second; 654 continue; 655 } 656 657 // Create the file entry for the file that we're mapping from. 658 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, 659 ToFile->getSize(), 0); 660 if (!FromFile) { 661 Diags.Report(diag::err_fe_remap_missing_from_file) 662 << Remap->first; 663 continue; 664 } 665 666 // Override the contents of the "from" file with the contents of 667 // the "to" file. 668 SourceMgr.overrideFileContents(FromFile, ToFile); 669 } 670 671 SourceMgr.setOverridenFilesKeepOriginalName( 672 InitOpts.RemappedFilesKeepOriginalName); 673 } 674 675 /// InitializePreprocessor - Initialize the preprocessor getting it and the 676 /// environment ready to process a single file. This returns true on error. 677 /// 678 void clang::InitializePreprocessor(Preprocessor &PP, 679 const PreprocessorOptions &InitOpts, 680 const HeaderSearchOptions &HSOpts, 681 const FrontendOptions &FEOpts) { 682 const LangOptions &LangOpts = PP.getLangOptions(); 683 std::string PredefineBuffer; 684 PredefineBuffer.reserve(4080); 685 llvm::raw_string_ostream Predefines(PredefineBuffer); 686 MacroBuilder Builder(Predefines); 687 688 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), 689 PP.getFileManager(), InitOpts); 690 691 // Emit line markers for various builtin sections of the file. We don't do 692 // this in asm preprocessor mode, because "# 4" is not a line marker directive 693 // in this mode. 694 if (!PP.getLangOptions().AsmPreprocessor) 695 Builder.append("# 1 \"<built-in>\" 3"); 696 697 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 698 if (InitOpts.UsePredefines) { 699 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 700 701 // Install definitions to make Objective-C++ ARC work well with various 702 // C++ Standard Library implementations. 703 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) { 704 switch (InitOpts.ObjCXXARCStandardLibrary) { 705 case ARCXX_nolib: 706 break; 707 708 case ARCXX_libcxx: 709 AddObjCXXARCLibcxxDefines(LangOpts, Builder); 710 break; 711 712 case ARCXX_libstdcxx: 713 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 714 break; 715 } 716 } 717 } 718 719 // Even with predefines off, some macros are still predefined. 720 // These should all be defined in the preprocessor according to the 721 // current language configuration. 722 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(), 723 FEOpts, Builder); 724 725 // Add on the predefines from the driver. Wrap in a #line directive to report 726 // that they come from the command line. 727 if (!PP.getLangOptions().AsmPreprocessor) 728 Builder.append("# 1 \"<command line>\" 1"); 729 730 // Process #define's and #undef's in the order they are given. 731 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 732 if (InitOpts.Macros[i].second) // isUndef 733 Builder.undefineMacro(InitOpts.Macros[i].first); 734 else 735 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 736 PP.getDiagnostics()); 737 } 738 739 // If -imacros are specified, include them now. These are processed before 740 // any -include directives. 741 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 742 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i], 743 PP.getFileManager()); 744 745 // Process -include directives. 746 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 747 const std::string &Path = InitOpts.Includes[i]; 748 if (Path == InitOpts.ImplicitPTHInclude) 749 AddImplicitIncludePTH(Builder, PP, Path); 750 else 751 AddImplicitInclude(Builder, Path, PP.getFileManager()); 752 } 753 754 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 755 if (!PP.getLangOptions().AsmPreprocessor) 756 Builder.append("# 1 \"<built-in>\" 2"); 757 758 // Instruct the preprocessor to skip the preamble. 759 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 760 InitOpts.PrecompiledPreambleBytes.second); 761 762 // Copy PredefinedBuffer into the Preprocessor. 763 PP.setPredefines(Predefines.str()); 764 765 // Initialize the header search object. 766 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, 767 PP.getLangOptions(), 768 PP.getTargetInfo().getTriple()); 769 } 770