| //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the clang::InitializePreprocessor function. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Basic/Version.h" |
| #include "clang/Frontend/Utils.h" |
| #include "clang/Basic/MacroBuilder.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/FrontendOptions.h" |
| #include "clang/Frontend/PreprocessorOptions.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "llvm/ADT/APFloat.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/System/Path.h" |
| using namespace clang; |
| |
| // Append a #define line to Buf for Macro. Macro should be of the form XXX, |
| // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit |
| // "#define XXX Y z W". To get a #define with no value, use "XXX=". |
| static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro, |
| Diagnostic &Diags) { |
| std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('='); |
| llvm::StringRef MacroName = MacroPair.first; |
| llvm::StringRef MacroBody = MacroPair.second; |
| if (MacroName.size() != Macro.size()) { |
| // Per GCC -D semantics, the macro ends at \n if it exists. |
| llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r"); |
| if (End != llvm::StringRef::npos) |
| Diags.Report(diag::warn_fe_macro_contains_embedded_newline) |
| << MacroName; |
| Builder.defineMacro(MacroName, MacroBody.substr(0, End)); |
| } else { |
| // Push "macroname 1". |
| Builder.defineMacro(Macro); |
| } |
| } |
| |
| std::string clang::NormalizeDashIncludePath(llvm::StringRef File) { |
| // Implicit include paths should be resolved relative to the current |
| // working directory first, and then use the regular header search |
| // mechanism. The proper way to handle this is to have the |
| // predefines buffer located at the current working directory, but |
| // it has not file entry. For now, workaround this by using an |
| // absolute path if we find the file here, and otherwise letting |
| // header search handle it. |
| llvm::sys::Path Path(File); |
| Path.makeAbsolute(); |
| if (!Path.exists()) |
| Path = File; |
| |
| return Lexer::Stringify(Path.str()); |
| } |
| |
| /// AddImplicitInclude - Add an implicit #include of the specified file to the |
| /// predefines buffer. |
| static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) { |
| Builder.append("#include \"" + |
| llvm::Twine(NormalizeDashIncludePath(File)) + "\""); |
| } |
| |
| static void AddImplicitIncludeMacros(MacroBuilder &Builder, |
| llvm::StringRef File) { |
| Builder.append("#__include_macros \"" + |
| llvm::Twine(NormalizeDashIncludePath(File)) + "\""); |
| // Marker token to stop the __include_macros fetch loop. |
| Builder.append("##"); // ##? |
| } |
| |
| /// AddImplicitIncludePTH - Add an implicit #include using the original file |
| /// used to generate a PTH cache. |
| static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, |
| llvm::StringRef ImplicitIncludePTH) { |
| PTHManager *P = PP.getPTHManager(); |
| assert(P && "No PTHManager."); |
| const char *OriginalFile = P->getOriginalSourceFile(); |
| |
| if (!OriginalFile) { |
| PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) |
| << ImplicitIncludePTH; |
| return; |
| } |
| |
| AddImplicitInclude(Builder, OriginalFile); |
| } |
| |
| /// PickFP - This is used to pick a value based on the FP semantics of the |
| /// specified FP model. |
| template <typename T> |
| static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, |
| T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, |
| T IEEEQuadVal) { |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) |
| return IEEESingleVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) |
| return IEEEDoubleVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) |
| return X87DoubleExtendedVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) |
| return PPCDoubleDoubleVal; |
| assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); |
| return IEEEQuadVal; |
| } |
| |
| static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix, |
| const llvm::fltSemantics *Sem) { |
| const char *DenormMin, *Epsilon, *Max, *Min; |
| DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", |
| "3.64519953188247460253e-4951L", |
| "4.94065645841246544176568792868221e-324L", |
| "6.47517511943802511092443895822764655e-4966L"); |
| int Digits = PickFP(Sem, 6, 15, 18, 31, 33); |
| Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", |
| "1.08420217248550443401e-19L", |
| "4.94065645841246544176568792868221e-324L", |
| "1.92592994438723585305597794258492732e-34L"); |
| int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); |
| int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); |
| int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); |
| int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); |
| int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); |
| Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", |
| "3.36210314311209350626e-4932L", |
| "2.00416836000897277799610805135016e-292L", |
| "3.36210314311209350626267781732175260e-4932L"); |
| Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", |
| "1.18973149535723176502e+4932L", |
| "1.79769313486231580793728971405301e+308L", |
| "1.18973149535723176508575932662800702e+4932L"); |
| |
| llvm::SmallString<32> DefPrefix; |
| DefPrefix = "__"; |
| DefPrefix += Prefix; |
| DefPrefix += "_"; |
| |
| Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin); |
| Builder.defineMacro(DefPrefix + "HAS_DENORM__"); |
| Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits)); |
| Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon)); |
| Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); |
| Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); |
| Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits)); |
| |
| Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp)); |
| Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp)); |
| Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max)); |
| |
| Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")"); |
| Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")"); |
| Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min)); |
| } |
| |
| |
| /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro |
| /// named MacroName with the max value for a type with width 'TypeWidth' a |
| /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). |
| static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth, |
| llvm::StringRef ValSuffix, bool isSigned, |
| MacroBuilder& Builder) { |
| long long MaxVal; |
| if (isSigned) |
| MaxVal = (1LL << (TypeWidth - 1)) - 1; |
| else |
| MaxVal = ~0LL >> (64-TypeWidth); |
| |
| Builder.defineMacro(MacroName, llvm::Twine(MaxVal) + ValSuffix); |
| } |
| |
| /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine |
| /// the width, suffix, and signedness of the given type |
| static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), |
| TI.isTypeSigned(Ty), Builder); |
| } |
| |
| static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty, |
| MacroBuilder &Builder) { |
| Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); |
| } |
| |
| static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty))); |
| } |
| |
| static void DefineExactWidthIntType(TargetInfo::IntType Ty, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| int TypeWidth = TI.getTypeWidth(Ty); |
| DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder); |
| |
| llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty)); |
| if (!ConstSuffix.empty()) |
| Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__", |
| ConstSuffix); |
| } |
| |
| static void InitializePredefinedMacros(const TargetInfo &TI, |
| const LangOptions &LangOpts, |
| const FrontendOptions &FEOpts, |
| MacroBuilder &Builder) { |
| // Compiler version introspection macros. |
| Builder.defineMacro("__llvm__"); // LLVM Backend |
| Builder.defineMacro("__clang__"); // Clang Frontend |
| #define TOSTR2(X) #X |
| #define TOSTR(X) TOSTR2(X) |
| Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); |
| Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); |
| #ifdef CLANG_VERSION_PATCHLEVEL |
| Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); |
| #else |
| Builder.defineMacro("__clang_patchlevel__", "0"); |
| #endif |
| Builder.defineMacro("__clang_version__", |
| "\"" CLANG_VERSION_STRING " (" |
| + getClangFullRepositoryVersion() + ")\""); |
| #undef TOSTR |
| #undef TOSTR2 |
| // Currently claim to be compatible with GCC 4.2.1-5621. |
| Builder.defineMacro("__GNUC_MINOR__", "2"); |
| Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); |
| Builder.defineMacro("__GNUC__", "4"); |
| Builder.defineMacro("__GXX_ABI_VERSION", "1002"); |
| Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible Clang Compiler\""); |
| |
| // Initialize language-specific preprocessor defines. |
| |
| // These should all be defined in the preprocessor according to the |
| // current language configuration. |
| if (!LangOpts.Microsoft) |
| Builder.defineMacro("__STDC__"); |
| if (LangOpts.AsmPreprocessor) |
| Builder.defineMacro("__ASSEMBLER__"); |
| |
| if (!LangOpts.CPlusPlus) { |
| if (LangOpts.C99) |
| Builder.defineMacro("__STDC_VERSION__", "199901L"); |
| else if (!LangOpts.GNUMode && LangOpts.Digraphs) |
| Builder.defineMacro("__STDC_VERSION__", "199409L"); |
| } |
| |
| // Standard conforming mode? |
| if (!LangOpts.GNUMode) |
| Builder.defineMacro("__STRICT_ANSI__"); |
| |
| if (LangOpts.CPlusPlus0x) |
| Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); |
| |
| if (LangOpts.Freestanding) |
| Builder.defineMacro("__STDC_HOSTED__", "0"); |
| else |
| Builder.defineMacro("__STDC_HOSTED__"); |
| |
| if (LangOpts.ObjC1) { |
| Builder.defineMacro("__OBJC__"); |
| if (LangOpts.ObjCNonFragileABI) { |
| Builder.defineMacro("__OBJC2__"); |
| Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); |
| } |
| |
| if (LangOpts.getGCMode() != LangOptions::NonGC) |
| Builder.defineMacro("__OBJC_GC__"); |
| |
| if (LangOpts.NeXTRuntime) |
| Builder.defineMacro("__NEXT_RUNTIME__"); |
| } |
| |
| // darwin_constant_cfstrings controls this. This is also dependent |
| // on other things like the runtime I believe. This is set even for C code. |
| Builder.defineMacro("__CONSTANT_CFSTRINGS__"); |
| |
| if (LangOpts.ObjC2) |
| Builder.defineMacro("OBJC_NEW_PROPERTIES"); |
| |
| if (LangOpts.PascalStrings) |
| Builder.defineMacro("__PASCAL_STRINGS__"); |
| |
| if (LangOpts.Blocks) { |
| Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); |
| Builder.defineMacro("__BLOCKS__"); |
| } |
| |
| if (LangOpts.Exceptions) |
| Builder.defineMacro("__EXCEPTIONS"); |
| if (LangOpts.SjLjExceptions) |
| Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); |
| |
| if (LangOpts.CPlusPlus) { |
| Builder.defineMacro("__DEPRECATED"); |
| Builder.defineMacro("__GNUG__", "4"); |
| Builder.defineMacro("__GXX_WEAK__"); |
| if (LangOpts.GNUMode) |
| Builder.defineMacro("__cplusplus"); |
| else |
| // C++ [cpp.predefined]p1: |
| // The name_ _cplusplusis defined to the value199711Lwhen compiling a |
| // C++ translation unit. |
| Builder.defineMacro("__cplusplus", "199711L"); |
| Builder.defineMacro("__private_extern__", "extern"); |
| } |
| |
| if (LangOpts.Microsoft) { |
| // Filter out some microsoft extensions when trying to parse in ms-compat |
| // mode. |
| Builder.defineMacro("__int8", "__INT8_TYPE__"); |
| Builder.defineMacro("__int16", "__INT16_TYPE__"); |
| Builder.defineMacro("__int32", "__INT32_TYPE__"); |
| Builder.defineMacro("__int64", "__INT64_TYPE__"); |
| // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however |
| // VC++ appears to only like __FUNCTION__. |
| Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__"); |
| // Work around some issues with Visual C++ headerws. |
| if (LangOpts.CPlusPlus) { |
| // Since we define wchar_t in C++ mode. |
| Builder.defineMacro("_WCHAR_T_DEFINED"); |
| Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); |
| // FIXME: This should be temporary until we have a __pragma |
| // solution, to avoid some errors flagged in VC++ headers. |
| Builder.defineMacro("_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES", "0"); |
| } |
| } |
| |
| if (LangOpts.Optimize) |
| Builder.defineMacro("__OPTIMIZE__"); |
| if (LangOpts.OptimizeSize) |
| Builder.defineMacro("__OPTIMIZE_SIZE__"); |
| |
| // Initialize target-specific preprocessor defines. |
| |
| // Define type sizing macros based on the target properties. |
| assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); |
| Builder.defineMacro("__CHAR_BIT__", "8"); |
| |
| DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder); |
| DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); |
| DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); |
| DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); |
| DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); |
| DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); |
| DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); |
| |
| DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); |
| DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); |
| DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); |
| DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); |
| DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); |
| DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); |
| DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); |
| DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); |
| DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); |
| DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); |
| DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); |
| DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); |
| DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); |
| DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); |
| |
| DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat()); |
| DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat()); |
| DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat()); |
| |
| // Define a __POINTER_WIDTH__ macro for stdint.h. |
| Builder.defineMacro("__POINTER_WIDTH__", |
| llvm::Twine((int)TI.getPointerWidth(0))); |
| |
| if (!LangOpts.CharIsSigned) |
| Builder.defineMacro("__CHAR_UNSIGNED__"); |
| |
| // Define exact-width integer types for stdint.h |
| Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__", |
| "char"); |
| |
| if (TI.getShortWidth() > TI.getCharWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); |
| |
| if (TI.getIntWidth() > TI.getShortWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); |
| |
| if (TI.getLongWidth() > TI.getIntWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); |
| |
| if (TI.getLongLongWidth() > TI.getLongWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); |
| |
| // Add __builtin_va_list typedef. |
| Builder.append(TI.getVAListDeclaration()); |
| |
| if (const char *Prefix = TI.getUserLabelPrefix()) |
| Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); |
| |
| // Build configuration options. FIXME: these should be controlled by |
| // command line options or something. |
| Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); |
| |
| if (LangOpts.GNUInline) |
| Builder.defineMacro("__GNUC_GNU_INLINE__"); |
| else |
| Builder.defineMacro("__GNUC_STDC_INLINE__"); |
| |
| if (LangOpts.NoInline) |
| Builder.defineMacro("__NO_INLINE__"); |
| |
| if (unsigned PICLevel = LangOpts.PICLevel) { |
| Builder.defineMacro("__PIC__", llvm::Twine(PICLevel)); |
| Builder.defineMacro("__pic__", llvm::Twine(PICLevel)); |
| } |
| |
| // Macros to control C99 numerics and <float.h> |
| Builder.defineMacro("__FLT_EVAL_METHOD__", "0"); |
| Builder.defineMacro("__FLT_RADIX__", "2"); |
| int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); |
| Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig)); |
| |
| if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn) |
| Builder.defineMacro("__SSP__"); |
| else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq) |
| Builder.defineMacro("__SSP_ALL__", "2"); |
| |
| if (FEOpts.ProgramAction == frontend::RewriteObjC) |
| Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); |
| // Get other target #defines. |
| TI.getTargetDefines(LangOpts, Builder); |
| } |
| |
| // Initialize the remapping of files to alternative contents, e.g., |
| // those specified through other files. |
| static void InitializeFileRemapping(Diagnostic &Diags, |
| SourceManager &SourceMgr, |
| FileManager &FileMgr, |
| const PreprocessorOptions &InitOpts) { |
| // Remap files in the source manager (with buffers). |
| for (PreprocessorOptions::remapped_file_buffer_iterator |
| Remap = InitOpts.remapped_file_buffer_begin(), |
| RemapEnd = InitOpts.remapped_file_buffer_end(); |
| Remap != RemapEnd; |
| ++Remap) { |
| // Create the file entry for the file that we're mapping from. |
| const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, |
| Remap->second->getBufferSize(), |
| 0); |
| if (!FromFile) { |
| Diags.Report(diag::err_fe_remap_missing_from_file) |
| << Remap->first; |
| delete Remap->second; |
| continue; |
| } |
| |
| // Override the contents of the "from" file with the contents of |
| // the "to" file. |
| SourceMgr.overrideFileContents(FromFile, Remap->second); |
| } |
| |
| // Remap files in the source manager (with other files). |
| for (PreprocessorOptions::remapped_file_iterator |
| Remap = InitOpts.remapped_file_begin(), |
| RemapEnd = InitOpts.remapped_file_end(); |
| Remap != RemapEnd; |
| ++Remap) { |
| // Find the file that we're mapping to. |
| const FileEntry *ToFile = FileMgr.getFile(Remap->second); |
| if (!ToFile) { |
| Diags.Report(diag::err_fe_remap_missing_to_file) |
| << Remap->first << Remap->second; |
| continue; |
| } |
| |
| // Create the file entry for the file that we're mapping from. |
| const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, |
| ToFile->getSize(), |
| 0); |
| if (!FromFile) { |
| Diags.Report(diag::err_fe_remap_missing_from_file) |
| << Remap->first; |
| continue; |
| } |
| |
| // Load the contents of the file we're mapping to. |
| std::string ErrorStr; |
| const llvm::MemoryBuffer *Buffer |
| = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr); |
| if (!Buffer) { |
| Diags.Report(diag::err_fe_error_opening) |
| << Remap->second << ErrorStr; |
| continue; |
| } |
| |
| // Override the contents of the "from" file with the contents of |
| // the "to" file. |
| SourceMgr.overrideFileContents(FromFile, Buffer); |
| } |
| } |
| |
| /// InitializePreprocessor - Initialize the preprocessor getting it and the |
| /// environment ready to process a single file. This returns true on error. |
| /// |
| void clang::InitializePreprocessor(Preprocessor &PP, |
| const PreprocessorOptions &InitOpts, |
| const HeaderSearchOptions &HSOpts, |
| const FrontendOptions &FEOpts) { |
| std::string PredefineBuffer; |
| PredefineBuffer.reserve(4080); |
| llvm::raw_string_ostream Predefines(PredefineBuffer); |
| MacroBuilder Builder(Predefines); |
| |
| InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), |
| PP.getFileManager(), InitOpts); |
| |
| // Emit line markers for various builtin sections of the file. We don't do |
| // this in asm preprocessor mode, because "# 4" is not a line marker directive |
| // in this mode. |
| if (!PP.getLangOptions().AsmPreprocessor) |
| Builder.append("# 1 \"<built-in>\" 3"); |
| |
| // Install things like __POWERPC__, __GNUC__, etc into the macro table. |
| if (InitOpts.UsePredefines) |
| InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(), |
| FEOpts, Builder); |
| |
| // Add on the predefines from the driver. Wrap in a #line directive to report |
| // that they come from the command line. |
| if (!PP.getLangOptions().AsmPreprocessor) |
| Builder.append("# 1 \"<command line>\" 1"); |
| |
| // Process #define's and #undef's in the order they are given. |
| for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { |
| if (InitOpts.Macros[i].second) // isUndef |
| Builder.undefineMacro(InitOpts.Macros[i].first); |
| else |
| DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, |
| PP.getDiagnostics()); |
| } |
| |
| // If -imacros are specified, include them now. These are processed before |
| // any -include directives. |
| for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) |
| AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); |
| |
| // Process -include directives. |
| for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { |
| const std::string &Path = InitOpts.Includes[i]; |
| if (Path == InitOpts.ImplicitPTHInclude) |
| AddImplicitIncludePTH(Builder, PP, Path); |
| else |
| AddImplicitInclude(Builder, Path); |
| } |
| |
| // Exit the command line and go back to <built-in> (2 is LC_LEAVE). |
| if (!PP.getLangOptions().AsmPreprocessor) |
| Builder.append("# 1 \"<built-in>\" 2"); |
| |
| // Copy PredefinedBuffer into the Preprocessor. |
| PP.setPredefines(Predefines.str()); |
| |
| // Initialize the header search object. |
| ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, |
| PP.getLangOptions(), |
| PP.getTargetInfo().getTriple()); |
| } |