InclusionRewriter.cpp revision ce6af1189fb8f6d2a6fa083cff84a796c8377504
18c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie//===--- InclusionRewriter.cpp - Rewrite includes into their expansions ---===// 28c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// 38c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// The LLVM Compiler Infrastructure 48c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// 58c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// This file is distributed under the University of Illinois Open Source 68c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// License. See LICENSE.TXT for details. 78c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// 88c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie//===----------------------------------------------------------------------===// 98c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// 108c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// This code rewrites include invocations into their expansions. This gives you 118c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// a file with all included files merged into it. 128c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie// 138c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie//===----------------------------------------------------------------------===// 148c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 15305c613af6cfc40e519c75d9d2c84c6fa9a841c0Ted Kremenek#include "clang/Rewrite/Frontend/Rewriters.h" 168c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie#include "clang/Basic/SourceManager.h" 178c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie#include "clang/Frontend/PreprocessorOutputOptions.h" 18596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer#include "clang/Lex/HeaderSearch.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/Preprocessor.h" 20596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer#include "llvm/ADT/SmallString.h" 218c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie#include "llvm/Support/raw_ostream.h" 228c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 238c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikieusing namespace clang; 248c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikieusing namespace llvm; 258c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 268c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikienamespace { 278c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 288c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikieclass InclusionRewriter : public PPCallbacks { 298c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie /// Information about which #includes were actually performed, 308c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie /// created by preprocessor callbacks. 318c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie struct FileChange { 3203409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis const Module *Mod; 338c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SourceLocation From; 348c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileID Id; 358c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType; 3603409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis FileChange(SourceLocation From, const Module *Mod) : Mod(Mod), From(From) { 378c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 388c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie }; 3949fdccb4595862828aa5cadc1497d466a8031ddaDmitri Gribenko Preprocessor &PP; ///< Used to find inclusion directives. 4049fdccb4595862828aa5cadc1497d466a8031ddaDmitri Gribenko SourceManager &SM; ///< Used to read and manage source files. 4149fdccb4595862828aa5cadc1497d466a8031ddaDmitri Gribenko raw_ostream &OS; ///< The destination stream for rewritten contents. 4249fdccb4595862828aa5cadc1497d466a8031ddaDmitri Gribenko bool ShowLineMarkers; ///< Show #line markers. 4349fdccb4595862828aa5cadc1497d466a8031ddaDmitri Gribenko bool UseLineDirective; ///< Use of line directives or line markers. 448c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie typedef std::map<unsigned, FileChange> FileChangeMap; 45959dc8475fc20ce8c3fd55021cb9f02a531cddc5Dmitri Gribenko FileChangeMap FileChanges; ///< Tracks which files were included where. 468c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie /// Used transitively for building up the FileChanges mapping over the 478c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie /// various \c PPCallbacks callbacks. 488c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileChangeMap::iterator LastInsertedFileChange; 498c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikiepublic: 508c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie InclusionRewriter(Preprocessor &PP, raw_ostream &OS, bool ShowLineMarkers); 518c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool Process(FileID FileId, SrcMgr::CharacteristicKind FileType); 528c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikieprivate: 538c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, 548c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType, 558c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileID PrevFID); 568c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie virtual void FileSkipped(const FileEntry &ParentFile, 578c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const Token &FilenameTok, 588c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType); 598c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie virtual void InclusionDirective(SourceLocation HashLoc, 608c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const Token &IncludeTok, 618c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef FileName, 628c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool IsAngled, 63da313592441db36cf4b06be97c4bcc238ee6fa9cArgyrios Kyrtzidis CharSourceRange FilenameRange, 648c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const FileEntry *File, 658c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef SearchPath, 66f8afcffe6a0213760b64c211812b1750e1e1e967Argyrios Kyrtzidis StringRef RelativePath, 67f8afcffe6a0213760b64c211812b1750e1e1e967Argyrios Kyrtzidis const Module *Imported); 688c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie void WriteLineInfo(const char *Filename, int Line, 698c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType, 708c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL, StringRef Extra = StringRef()); 7103409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis void WriteImplicitModuleImport(const Module *Mod, StringRef EOL); 728c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie void OutputContentUpTo(const MemoryBuffer &FromFile, 738c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie unsigned &WriteFrom, unsigned WriteTo, 748c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL, int &lines, 758c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool EnsureNewline = false); 768c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie void CommentOutDirective(Lexer &DirectivesLex, const Token &StartToken, 778c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const MemoryBuffer &FromFile, StringRef EOL, 788c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie unsigned &NextToWrite, int &Lines); 79596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool HandleHasInclude(FileID FileId, Lexer &RawLex, 80596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer const DirectoryLookup *Lookup, Token &Tok, 81596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool &FileExists); 828c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const FileChange *FindFileChangeLocation(SourceLocation Loc) const; 838c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef NextIdentifierName(Lexer &RawLex, Token &RawToken); 848c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie}; 858c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 868c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} // end anonymous namespace 878c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 888c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Initializes an InclusionRewriter with a \p PP source and \p OS destination. 898c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid BlaikieInclusionRewriter::InclusionRewriter(Preprocessor &PP, raw_ostream &OS, 908c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool ShowLineMarkers) 918c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie : PP(PP), SM(PP.getSourceManager()), OS(OS), 928c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie ShowLineMarkers(ShowLineMarkers), 938c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie LastInsertedFileChange(FileChanges.end()) { 948c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // If we're in microsoft mode, use normal #line instead of line markers. 958c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie UseLineDirective = PP.getLangOpts().MicrosoftExt; 968c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 978c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 988c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Write appropriate line information as either #line directives or GNU line 998c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// markers depending on what mode we're in, including the \p Filename and 1008c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// \p Line we are located at, using the specified \p EOL line separator, and 1018c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// any \p Extra context specifiers in GNU line directives. 1028c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::WriteLineInfo(const char *Filename, int Line, 1038c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType, 1048c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL, StringRef Extra) { 1058c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (!ShowLineMarkers) 1068c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return; 1078c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (UseLineDirective) { 1088c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << "#line" << ' ' << Line << ' ' << '"' << Filename << '"'; 1098c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } else { 1108c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // Use GNU linemarkers as described here: 1118c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // http://gcc.gnu.org/onlinedocs/cpp/Preprocessor-Output.html 1128c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << '#' << ' ' << Line << ' ' << '"' << Filename << '"'; 1138c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (!Extra.empty()) 1148c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << Extra; 1158c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (FileType == SrcMgr::C_System) 1168c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // "`3' This indicates that the following text comes from a system header 1178c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // file, so certain warnings should be suppressed." 1188c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << " 3"; 1198c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie else if (FileType == SrcMgr::C_ExternCSystem) 1208c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // as above for `3', plus "`4' This indicates that the following text 1218c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // should be treated as being wrapped in an implicit extern "C" block." 1228c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << " 3 4"; 1238c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 1248c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << EOL; 1258c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 1268c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 12703409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidisvoid InclusionRewriter::WriteImplicitModuleImport(const Module *Mod, 12803409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis StringRef EOL) { 12903409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis OS << "@import " << Mod->getFullModuleName() << ";" 13003409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis << " /* clang -frewrite-includes: implicit import */" << EOL; 13103409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis} 13203409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis 1338c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// FileChanged - Whenever the preprocessor enters or exits a #include file 1348c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// it invokes this handler. 1358c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::FileChanged(SourceLocation Loc, 1368c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileChangeReason Reason, 1378c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind NewFileType, 1388c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileID) { 1398c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (Reason != EnterFile) 1408c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return; 1418c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (LastInsertedFileChange == FileChanges.end()) 1428c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // we didn't reach this file (eg: the main file) via an inclusion directive 1438c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return; 1448c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie LastInsertedFileChange->second.Id = FullSourceLoc(Loc, SM).getFileID(); 1458c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie LastInsertedFileChange->second.FileType = NewFileType; 1468c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie LastInsertedFileChange = FileChanges.end(); 1478c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 1488c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 1498c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Called whenever an inclusion is skipped due to canonical header protection 1508c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// macros. 1518c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::FileSkipped(const FileEntry &/*ParentFile*/, 1528c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const Token &/*FilenameTok*/, 1538c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind /*FileType*/) { 1548c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie assert(LastInsertedFileChange != FileChanges.end() && "A file, that wasn't " 1558c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie "found via an inclusion directive, was skipped"); 1568c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileChanges.erase(LastInsertedFileChange); 1578c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie LastInsertedFileChange = FileChanges.end(); 1588c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 1598c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 1608c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// This should be called whenever the preprocessor encounters include 1618c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// directives. It does not say whether the file has been included, but it 1628c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// provides more information about the directive (hash location instead 1638c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// of location inside the included file). It is assumed that the matching 1648c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// FileChanged() or FileSkipped() is called after this. 1658c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::InclusionDirective(SourceLocation HashLoc, 1668c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const Token &/*IncludeTok*/, 1678c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef /*FileName*/, 1688c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool /*IsAngled*/, 169da313592441db36cf4b06be97c4bcc238ee6fa9cArgyrios Kyrtzidis CharSourceRange /*FilenameRange*/, 1708c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const FileEntry * /*File*/, 1718c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef /*SearchPath*/, 172f8afcffe6a0213760b64c211812b1750e1e1e967Argyrios Kyrtzidis StringRef /*RelativePath*/, 17303409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis const Module *Imported) { 1748c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie assert(LastInsertedFileChange == FileChanges.end() && "Another inclusion " 1758c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie "directive was found before the previous one was processed"); 1768c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie std::pair<FileChangeMap::iterator, bool> p = FileChanges.insert( 17703409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis std::make_pair(HashLoc.getRawEncoding(), FileChange(HashLoc, Imported))); 1788c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie assert(p.second && "Unexpected revisitation of the same include directive"); 17903409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis if (!Imported) 18003409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis LastInsertedFileChange = p.first; 1818c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 1828c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 1838c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Simple lookup for a SourceLocation (specifically one denoting the hash in 1848c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// an inclusion directive) in the map of inclusion information, FileChanges. 1858c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikieconst InclusionRewriter::FileChange * 1868c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid BlaikieInclusionRewriter::FindFileChangeLocation(SourceLocation Loc) const { 1878c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileChangeMap::const_iterator I = FileChanges.find(Loc.getRawEncoding()); 1888c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (I != FileChanges.end()) 1898c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return &I->second; 1908c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return NULL; 1918c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 1928c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 1938c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Detect the likely line ending style of \p FromFile by examining the first 1948c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// newline found within it. 1958c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikiestatic StringRef DetectEOL(const MemoryBuffer &FromFile) { 1968c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // detect what line endings the file uses, so that added content does not mix 1978c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // the style 1988c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const char *Pos = strchr(FromFile.getBufferStart(), '\n'); 1998c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (Pos == NULL) 2008c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return "\n"; 2018c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (Pos + 1 < FromFile.getBufferEnd() && Pos[1] == '\r') 2028c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return "\n\r"; 2038c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (Pos - 1 >= FromFile.getBufferStart() && Pos[-1] == '\r') 2048c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return "\r\n"; 2058c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return "\n"; 2068c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 2078c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 2088c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Writes out bytes from \p FromFile, starting at \p NextToWrite and ending at 2098c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// \p WriteTo - 1. 2108c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::OutputContentUpTo(const MemoryBuffer &FromFile, 2118c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie unsigned &WriteFrom, unsigned WriteTo, 2128c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL, int &Line, 2138c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool EnsureNewline) { 2148c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (WriteTo <= WriteFrom) 2158c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return; 2168c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS.write(FromFile.getBufferStart() + WriteFrom, WriteTo - WriteFrom); 2178c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // count lines manually, it's faster than getPresumedLoc() 2183159819ed71a2e814175a593147f7637a423ba56Benjamin Kramer Line += std::count(FromFile.getBufferStart() + WriteFrom, 2193159819ed71a2e814175a593147f7637a423ba56Benjamin Kramer FromFile.getBufferStart() + WriteTo, '\n'); 2208c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (EnsureNewline) { 2218c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie char LastChar = FromFile.getBufferStart()[WriteTo - 1]; 2228c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (LastChar != '\n' && LastChar != '\r') 2238c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS << EOL; 2248c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 2258c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie WriteFrom = WriteTo; 2268c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 2278c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 2288c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Print characters from \p FromFile starting at \p NextToWrite up until the 2298c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// inclusion directive at \p StartToken, then print out the inclusion 2308c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// inclusion directive disabled by a #if directive, updating \p NextToWrite 2318c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// and \p Line to track the number of source lines visited and the progress 2328c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// through the \p FromFile buffer. 2338c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid InclusionRewriter::CommentOutDirective(Lexer &DirectiveLex, 2348c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const Token &StartToken, 2358c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const MemoryBuffer &FromFile, 2368c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL, 2378c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie unsigned &NextToWrite, int &Line) { 2388c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OutputContentUpTo(FromFile, NextToWrite, 2398c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SM.getFileOffset(StartToken.getLocation()), EOL, Line); 2408c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Token DirectiveToken; 2418c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie do { 2428c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie DirectiveLex.LexFromRawLexer(DirectiveToken); 2438c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } while (!DirectiveToken.is(tok::eod) && DirectiveToken.isNot(tok::eof)); 24460ad16b7e24cdb88c577c107b69da85458000858David Blaikie OS << "#if 0 /* expanded by -frewrite-includes */" << EOL; 2458c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OutputContentUpTo(FromFile, NextToWrite, 2468c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SM.getFileOffset(DirectiveToken.getLocation()) + DirectiveToken.getLength(), 2478c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie EOL, Line); 24860ad16b7e24cdb88c577c107b69da85458000858David Blaikie OS << "#endif /* expanded by -frewrite-includes */" << EOL; 2498c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 2508c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 2518c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Find the next identifier in the pragma directive specified by \p RawToken. 2528c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid BlaikieStringRef InclusionRewriter::NextIdentifierName(Lexer &RawLex, 2538c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Token &RawToken) { 2548c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.LexFromRawLexer(RawToken); 2558c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (RawToken.is(tok::raw_identifier)) 2568c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.LookUpIdentifierInfo(RawToken); 2578c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (RawToken.is(tok::identifier)) 2588c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return RawToken.getIdentifierInfo()->getName(); 2598c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return StringRef(); 2608c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 2618c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 262596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer// Expand __has_include and __has_include_next if possible. If there's no 263596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer// definitive answer return false. 264596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramerbool InclusionRewriter::HandleHasInclude( 265596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer FileID FileId, Lexer &RawLex, const DirectoryLookup *Lookup, Token &Tok, 266596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool &FileExists) { 267596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Lex the opening paren. 268596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(Tok); 269596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.isNot(tok::l_paren)) 270596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 271596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 272596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(Tok); 273596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 274596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer SmallString<128> FilenameBuffer; 275596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer StringRef Filename; 276596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Since the raw lexer doesn't give us angle_literals we have to parse them 277596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // ourselves. 278596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // FIXME: What to do if the file name is a macro? 279596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.is(tok::less)) { 280596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(Tok); 281596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 282596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer FilenameBuffer += '<'; 283596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer do { 284596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.is(tok::eod)) // Sanity check. 285596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 286596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 287596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.is(tok::raw_identifier)) 288596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer PP.LookUpIdentifierInfo(Tok); 289596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 290596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Get the string piece. 291596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer SmallVector<char, 128> TmpBuffer; 292596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool Invalid = false; 293596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer StringRef TmpName = PP.getSpelling(Tok, TmpBuffer, &Invalid); 294596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Invalid) 295596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 296596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 297596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer FilenameBuffer += TmpName; 298596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 299596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(Tok); 300596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } while (Tok.isNot(tok::greater)); 301596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 302596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer FilenameBuffer += '>'; 303596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer Filename = FilenameBuffer; 304596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } else { 305596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.isNot(tok::string_literal)) 306596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 307596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 308596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool Invalid = false; 309596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer Filename = PP.getSpelling(Tok, FilenameBuffer, &Invalid); 310596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Invalid) 311596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 312596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } 313596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 314596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Lex the closing paren. 315596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(Tok); 316596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Tok.isNot(tok::r_paren)) 317596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return false; 318596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 319596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Now ask HeaderInfo if it knows about the header. 320596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // FIXME: Subframeworks aren't handled here. Do we care? 321596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool isAngled = PP.GetIncludeFilenameSpelling(Tok.getLocation(), Filename); 322596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer const DirectoryLookup *CurDir; 323596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer const FileEntry *File = PP.getHeaderSearchInfo().LookupFile( 324596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer Filename, isAngled, 0, CurDir, 325596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer PP.getSourceManager().getFileEntryForID(FileId), 0, 0, 0, false); 326596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 327596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer FileExists = File != 0; 328596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer return true; 329596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer} 330596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 3318c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// Use a raw lexer to analyze \p FileId, inccrementally copying parts of it 3328c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie/// and including content of included files recursively. 3338c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikiebool InclusionRewriter::Process(FileID FileId, 3348c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SrcMgr::CharacteristicKind FileType) 3358c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie{ 3368c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie bool Invalid; 3378c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const MemoryBuffer &FromFile = *SM.getBuffer(FileId, &Invalid); 338bae2b31822e3c2139b5f8fbb127e4c5674cce6dbDavid Blaikie if (Invalid) // invalid inclusion 339507d496e18fb7bf54e4cb8f79df56941f93f1edaArgyrios Kyrtzidis return false; 3408c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const char *FileName = FromFile.getBufferIdentifier(); 3418c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Lexer RawLex(FileId, &FromFile, PP.getSourceManager(), PP.getLangOpts()); 3428c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.SetCommentRetentionState(false); 3438c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3448c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef EOL = DetectEOL(FromFile); 3458c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3468c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // Per the GNU docs: "1" indicates the start of a new file. 3478c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie WriteLineInfo(FileName, 1, FileType, EOL, " 1"); 3488c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3498c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (SM.getFileIDSize(FileId) == 0) 350507d496e18fb7bf54e4cb8f79df56941f93f1edaArgyrios Kyrtzidis return false; 3518c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3528c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // The next byte to be copied from the source file 3538c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie unsigned NextToWrite = 0; 3548c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie int Line = 1; // The current input file line number. 3558c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3568c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Token RawToken; 3578c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.LexFromRawLexer(RawToken); 3588c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 3598c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // TODO: Consider adding a switch that strips possibly unimportant content, 3608c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // such as comments, to reduce the size of repro files. 3618c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie while (RawToken.isNot(tok::eof)) { 3628c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (RawToken.is(tok::hash) && RawToken.isAtStartOfLine()) { 3638c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.setParsingPreprocessorDirective(true); 3648c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Token HashToken = RawToken; 3658c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.LexFromRawLexer(RawToken); 3668c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (RawToken.is(tok::raw_identifier)) 3678c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.LookUpIdentifierInfo(RawToken); 368ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak if (RawToken.getIdentifierInfo() != NULL) { 3698c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie switch (RawToken.getIdentifierInfo()->getPPKeywordID()) { 3708c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie case tok::pp_include: 3718c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie case tok::pp_include_next: 3728c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie case tok::pp_import: { 3738c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie CommentOutDirective(RawLex, HashToken, FromFile, EOL, NextToWrite, 3748c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Line); 37503409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis StringRef LineInfoExtra; 3768c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (const FileChange *Change = FindFileChangeLocation( 3778c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie HashToken.getLocation())) { 37803409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis if (Change->Mod) { 37903409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis WriteImplicitModuleImport(Change->Mod, EOL); 38003409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis 38103409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis // else now include and recursively process the file 38203409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis } else if (Process(Change->Id, Change->FileType)) { 3838c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // and set lineinfo back to this file, if the nested one was 3848c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // actually included 3858c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // `2' indicates returning to a file (after having included 3868c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // another file. 38703409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis LineInfoExtra = " 2"; 388507d496e18fb7bf54e4cb8f79df56941f93f1edaArgyrios Kyrtzidis } 38903409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis } 39003409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis // fix up lineinfo (since commented out directive changed line 39103409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis // numbers) for inclusions that were skipped due to header guards 39203409967bd9860ffb2ff6b38126e04493c55567fArgyrios Kyrtzidis WriteLineInfo(FileName, Line, FileType, EOL, LineInfoExtra); 3938c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie break; 3948c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 3958c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie case tok::pp_pragma: { 3968c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie StringRef Identifier = NextIdentifierName(RawLex, RawToken); 3978c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (Identifier == "clang" || Identifier == "GCC") { 3988c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie if (NextIdentifierName(RawLex, RawToken) == "system_header") { 3998c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // keep the directive in, commented out 4008c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie CommentOutDirective(RawLex, HashToken, FromFile, EOL, 4018c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie NextToWrite, Line); 4028c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // update our own type 4038c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie FileType = SM.getFileCharacteristic(RawToken.getLocation()); 4048c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie WriteLineInfo(FileName, Line, FileType, EOL); 4058c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4068c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } else if (Identifier == "once") { 4078c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // keep the directive in, commented out 4088c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie CommentOutDirective(RawLex, HashToken, FromFile, EOL, 4098c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie NextToWrite, Line); 4108c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie WriteLineInfo(FileName, Line, FileType, EOL); 4118c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4128c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie break; 4138c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 414596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer case tok::pp_if: 415ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak case tok::pp_elif: { 416ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak bool elif = (RawToken.getIdentifierInfo()->getPPKeywordID() == 417ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak tok::pp_elif); 418596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Rewrite special builtin macros to avoid pulling in host details. 419596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer do { 420596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Walk over the directive. 421596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawLex.LexFromRawLexer(RawToken); 422596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (RawToken.is(tok::raw_identifier)) 423596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer PP.LookUpIdentifierInfo(RawToken); 424596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 425596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (RawToken.is(tok::identifier)) { 426596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer bool HasFile; 427596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer SourceLocation Loc = RawToken.getLocation(); 428596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 429596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Rewrite __has_include(x) 430596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (RawToken.getIdentifierInfo()->isStr("__has_include")) { 431596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (!HandleHasInclude(FileId, RawLex, 0, RawToken, HasFile)) 432596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer continue; 433596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Rewrite __has_include_next(x) 434596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } else if (RawToken.getIdentifierInfo()->isStr( 435596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer "__has_include_next")) { 436596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer const DirectoryLookup *Lookup = PP.GetCurDirLookup(); 437596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (Lookup) 438596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer ++Lookup; 439596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer 440596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer if (!HandleHasInclude(FileId, RawLex, Lookup, RawToken, 441596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer HasFile)) 442596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer continue; 443596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } else { 444596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer continue; 445596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } 446596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // Replace the macro with (0) or (1), followed by the commented 447596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer // out macro for reference. 448596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer OutputContentUpTo(FromFile, NextToWrite, SM.getFileOffset(Loc), 449596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer EOL, Line); 450596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer OS << '(' << (int) HasFile << ")/*"; 451596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer OutputContentUpTo(FromFile, NextToWrite, 452596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer SM.getFileOffset(RawToken.getLocation()) + 453596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer RawToken.getLength(), 454596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer EOL, Line); 455596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer OS << "*/"; 456596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } 457596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer } while (RawToken.isNot(tok::eod)); 458ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak if (elif) { 459ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak OutputContentUpTo(FromFile, NextToWrite, 460ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak SM.getFileOffset(RawToken.getLocation()) + 461ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak RawToken.getLength(), 462ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak EOL, Line, /*EnsureNewLine*/ true); 463ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak WriteLineInfo(FileName, Line, FileType, EOL); 464ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak } 465596eea7cc26979c952a0b177d024787a99b299dfBenjamin Kramer break; 466ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak } 467ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak case tok::pp_endif: 468ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak case tok::pp_else: { 469ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak // We surround every #include by #if 0 to comment it out, but that 470ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak // changes line numbers. These are fixed up right after that, but 471ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak // the whole #include could be inside a preprocessor conditional 472ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak // that is not processed. So it is necessary to fix the line 473ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak // numbers one the next line after each #else/#endif as well. 474ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak RawLex.SetKeepWhitespaceMode(true); 475ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak do { 476ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak RawLex.LexFromRawLexer(RawToken); 477ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak } while (RawToken.isNot(tok::eod) && RawToken.isNot(tok::eof)); 478ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak OutputContentUpTo( 479ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak FromFile, NextToWrite, 480ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak SM.getFileOffset(RawToken.getLocation()) + RawToken.getLength(), 481ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak EOL, Line, /*EnsureNewLine*/ true); 482ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak WriteLineInfo(FileName, Line, FileType, EOL); 483ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak RawLex.SetKeepWhitespaceMode(false); 484ce6af1189fb8f6d2a6fa083cff84a796c8377504Lubos Lunak } 4858c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie default: 4868c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie break; 4878c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4888c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4898c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.setParsingPreprocessorDirective(false); 4908c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4918c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie RawLex.LexFromRawLexer(RawToken); 4928c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } 4938c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OutputContentUpTo(FromFile, NextToWrite, 494b18840ddd6aa472bbf78ab9de59159eb128fb6a9Argyrios Kyrtzidis SM.getFileOffset(SM.getLocForEndOfFile(FileId)), EOL, Line, 4958c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie /*EnsureNewline*/true); 4968c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie return true; 4978c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 4988c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 49960ad16b7e24cdb88c577c107b69da85458000858David Blaikie/// InclusionRewriterInInput - Implement -frewrite-includes mode. 5008c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikievoid clang::RewriteIncludesInInput(Preprocessor &PP, raw_ostream *OS, 5018c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie const PreprocessorOutputOptions &Opts) { 5028c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie SourceManager &SM = PP.getSourceManager(); 5038c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie InclusionRewriter *Rewrite = new InclusionRewriter(PP, *OS, 5048c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Opts.ShowLineMarkers); 5058c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.addPPCallbacks(Rewrite); 5068c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie 5078c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // First let the preprocessor process the entire file and call callbacks. 5088c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // Callbacks will record which #include's were actually performed. 5098c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.EnterMainSourceFile(); 5108c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Token Tok; 5118c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // Only preprocessor directives matter here, so disable macro expansion 5128c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // everywhere else as an optimization. 5138c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // TODO: It would be even faster if the preprocessor could be switched 5148c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // to a mode where it would parse only preprocessor directives and comments, 5158c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie // nothing else matters for parsing or processing. 5168c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.SetMacroExpansionOnlyInDirectives(); 5178c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie do { 5188c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie PP.Lex(Tok); 5198c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie } while (Tok.isNot(tok::eof)); 5208c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie Rewrite->Process(SM.getMainFileID(), SrcMgr::C_User); 5218c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie OS->flush(); 5228c0b3787e7ccc7978b42dfbb84da2b802c743a5dDavid Blaikie} 523