PPLexerChange.cpp revision c9c3907e66659e4457593fdec4a27c671c12e041
18c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===--- PPLexerChange.cpp - Handle changing lexers in the preprocessor ---===// 28c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 38c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// The LLVM Compiler Infrastructure 48c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 58c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// This file is distributed under the University of Illinois Open Source 68c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// License. See LICENSE.TXT for details. 78c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 88c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 98c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// This file implements pieces of the Preprocessor interface that manage the 118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// current lexer stack. 128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 158c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Lex/Preprocessor.h" 16aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor#include "clang/Basic/FileManager.h" 178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Basic/SourceManager.h" 1855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/HeaderSearch.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/LexDiagnostic.h" 2055fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/MacroInfo.h" 2155fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "llvm/ADT/StringSwitch.h" 22585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/Support/FileSystem.h" 2315ba2af0f9ad52e67e908179b8ec2eb404e11c61Ted Kremenek#include "llvm/Support/MemoryBuffer.h" 24585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/Support/PathV2.h" 258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerusing namespace clang; 268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 274b391087f9c5582d448ab66ccbc7028f7673f380Ted KremenekPPCallbacks::~PPCallbacks() {} 288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 306b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Miscellaneous Methods. 318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// isInPrimaryFile - Return true if we're in the top-level file, not in a 341a5f9000b690d08e65b6b8821e4f7c57d63beb1dJames Dennett/// \#include. This looks through macro expansions and active _Pragma lexers. 358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::isInPrimaryFile() const { 3681d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return IncludeMacroStack.empty(); 381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If there are any stacked lexers, we're in a #include. 4081d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek assert(IsFileLexer(IncludeMacroStack[0]) && 418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Top level include stack isn't our primary lexer?"); 428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 1, e = IncludeMacroStack.size(); i != e; ++i) 4381d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(IncludeMacroStack[i])) 448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 488c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// getCurrentLexer - Return the current file lexer being lexed from. Note 498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// that this ignores any potentially active macro expansions and _Pragma 508c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// expansions going on at the time. 5168e48e4a81767997ef0231e47eca4f665102c95eTed KremenekPreprocessorLexer *Preprocessor::getCurrentFileLexer() const { 5281d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 5368e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return CurPPLexer; 541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Look for a stacked lexer. 568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = IncludeMacroStack.size(); i != 0; --i) { 5768e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek const IncludeStackInfo& ISI = IncludeMacroStack[i-1]; 5881d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISI)) 5968e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return ISI.ThePPLexer; 608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return 0; 628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 646b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner 656b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 666b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Methods for Entering and Callbacks for leaving various contexts 676b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 688c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterSourceFile - Add a source file to the top of the include stack and 70e7f2cbd8c093dcaebaa04c3f7b8fb1a0b4533b15Nuno Lopes/// start lexing tokens from it instead of the current buffer. 71e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattnervoid Preprocessor::EnterSourceFile(FileID FID, const DirectoryLookup *CurDir, 72e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation Loc) { 738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(CurTokenLexer == 0 && "Cannot #include a file inside a macro!"); 748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner ++NumEnteredSourceFiles; 751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (MaxIncludeStackDepth < IncludeMacroStack.size()) 778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner MaxIncludeStackDepth = IncludeMacroStack.size(); 788c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 796137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (PTH) { 806e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner if (PTHLexer *PL = PTH->CreateLexer(FID)) { 816e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithPTH(PL, CurDir); 82e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 836e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner } 846137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 856e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner 866e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner // Get the MemoryBuffer for this FID, if it fails, we fail. 87aae58b0c3efb5fa9f97a3e4b1c1a2d31077efe5bDouglas Gregor bool Invalid = false; 88e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner const llvm::MemoryBuffer *InputFile = 89e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner getSourceManager().getBuffer(FID, Loc, &Invalid); 90e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Invalid) { 91e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation FileStart = SourceMgr.getLocForStartOfFile(FID); 92e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner Diag(Loc, diag::err_pp_error_opening_file) 93e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner << std::string(SourceMgr.getBufferName(FileStart)) << ""; 94e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 95e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner } 967d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 977d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && 987d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getFileEntryForID(FID) == CodeCompletionFile) { 997d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc = SourceMgr.getLocForStartOfFile(FID); 1007d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionLoc = 101a64ccefdf0ea4e03ec88805d71b0af74950c7472Argyrios Kyrtzidis CodeCompletionFileLoc.getLocWithOffset(CodeCompletionOffset); 1027d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 1037d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 1046e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithLexer(new Lexer(FID, InputFile, *this), CurDir); 105e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 1061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 107721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner 1086137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithLexer - Add a source file to the top of the include stack 1096137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start lexing tokens from it instead of the current buffer. 1101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithLexer(Lexer *TheLexer, 1118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner const DirectoryLookup *CurDir) { 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Add the current lexer to the include stack. 11441938c8493b4380df738263166b746eacb33c309Ted Kremenek if (CurPPLexer || CurTokenLexer) 115ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 116ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek 117caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurLexer.reset(TheLexer); 1189c1b750c59d510e6c9eccb1f37bccc46ccfe6844Ted Kremenek CurPPLexer = TheLexer; 1198c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = CurDir; 120b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 121b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_Lexer; 122b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1238c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 1248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (Callbacks && !CurLexer->Is_PragmaLexer) { 1259d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 1260b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner SourceMgr.getFileCharacteristic(CurLexer->getFileLoc()); 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Callbacks->FileChanged(CurLexer->getFileLoc(), 1298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner PPCallbacks::EnterFile, FileType); 1308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 1318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1336137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithPTH - Add a source file to the top of the include stack 1346137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start getting tokens from it using the PTH cache. 1351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithPTH(PTHLexer *PL, 1366137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek const DirectoryLookup *CurDir) { 1371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1386137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (CurPPLexer || CurTokenLexer) 1396137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek PushIncludeMacroStack(); 1408c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1416137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurDirLookup = CurDir; 1426137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPTHLexer.reset(PL); 1436137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPPLexer = CurPTHLexer.get(); 144b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 145b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_PTHLexer; 146b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1476137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek // Notify the client, if desired, that we are in a new source file. 1486137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (Callbacks) { 1492b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = CurPPLexer->getFileID(); 1508c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceLocation EnterLoc = SourceMgr.getLocForStartOfFile(FID); 1518c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SrcMgr::CharacteristicKind FileType = 1528c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(EnterLoc); 1538c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(EnterLoc, PPCallbacks::EnterFile, FileType); 1546137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 1556137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek} 1568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterMacro - Add a Macro to the top of the include stack and start lexing 1588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// tokens from it instead of the current buffer. 159e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattnervoid Preprocessor::EnterMacro(Token &Tok, SourceLocation ILEnd, 160c30981a563a8947cb26b1e308d122fa2ef90fcebRichard Smith MacroInfo *Macro, MacroArgs *Args) { 161bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokenLexer *TokLexer; 1628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 163bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer = new TokenLexer(Tok, ILEnd, Macro, Args, *this); 1648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 165bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer = TokenLexerCache[--NumCachedTokenLexers]; 166bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer->Init(Tok, ILEnd, Macro, Args); 1678c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 168bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 169bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis PushIncludeMacroStack(); 170bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis CurDirLookup = 0; 171bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis CurTokenLexer.reset(TokLexer); 172b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 173b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 1748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1758c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterTokenStream - Add a "macro" context to the top of the include stack, 1776b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// which will cause the lexer to start returning the specified tokens. 1786b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1796b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If DisableMacroExpansion is true, tokens lexed from the token stream will 1806b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// not be subject to further macro expansion. Otherwise, these tokens will 1816b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// be re-macro-expanded when/if expansion is enabled. 1826b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1836b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If OwnsTokens is false, this method assumes that the specified stream of 1846b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// tokens has a permanent owner somewhere, so they do not need to be copied. 1856b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If it is true, it assumes the array of tokens is allocated with new[] and 1866b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// must be freed. 1876b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1886b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattnervoid Preprocessor::EnterTokenStream(const Token *Toks, unsigned NumToks, 1896b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool DisableMacroExpansion, 1906b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool OwnsTokens) { 1918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Create a macro expander to expand from the specified token stream. 192bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokenLexer *TokLexer; 1938c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 194bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer = new TokenLexer(Toks, NumToks, DisableMacroExpansion, 195bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis OwnsTokens, *this); 1968c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 197bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer = TokenLexerCache[--NumCachedTokenLexers]; 198bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer->Init(Toks, NumToks, DisableMacroExpansion, OwnsTokens); 1998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 200bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 201bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Save our current state. 202bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis PushIncludeMacroStack(); 203bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis CurDirLookup = 0; 204bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis CurTokenLexer.reset(TokLexer); 205b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 206b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 2078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 2088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 209585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// \brief Compute the relative path that names the given file relative to 210585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// the given directory. 211585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregorstatic void computeRelativePath(FileManager &FM, const DirectoryEntry *Dir, 212585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const FileEntry *File, 213f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<128> &Result) { 214585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result.clear(); 215585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 216585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef FilePath = File->getDir()->getName(); 217585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef Path = FilePath; 218585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor while (!Path.empty()) { 219585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (const DirectoryEntry *CurDir = FM.getDirectory(Path)) { 220585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (CurDir == Dir) { 221585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = FilePath.substr(Path.size()); 222585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::append(Result, 223585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::filename(File->getName())); 224585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor return; 225585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 226585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 227585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 228585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Path = llvm::sys::path::parent_path(Path); 229585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 230585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 231585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = File->getName(); 232585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor} 233585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 2348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfFile - This callback is invoked when the lexer hits the end of 2358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the current file. This either returns the EOF token or pops a level off 2368c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the include stack and keeps going. 2378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfFile(Token &Result, bool isEndOfMacro) { 2388c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!CurTokenLexer && 2398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a file when currently in a macro!"); 2401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // See if this file had a controlling macro. 2421a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurPPLexer) { // Not ending a macro, ignore it. 2431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const IdentifierInfo *ControllingMacro = 2441a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPPLexer->MIOpt.GetControllingMacroAtEndOfFile()) { 24583d63c78810556d26b62ac4cbae2eda6cdd2570cSteve Naroff // Okay, this has a controlling macro, remember in HeaderFileInfo. 2461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const FileEntry *FE = 247d83d2e73fdbe425acc4cac7b8130c464cb98333dDouglas Gregor SourceMgr.getFileEntryForID(CurPPLexer->getFileID())) 2488c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner HeaderInfo.SetFileControllingMacro(FE, ControllingMacro); 2498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2508c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2523eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // Complain about reaching a true EOF within arc_cf_code_audited. 2533eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // We don't want to complain about reaching the end of a macro 2543eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // instantiation or a _Pragma. 2553eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall if (PragmaARCCFCodeAuditedLoc.isValid() && 256d80d90d65895a2004b0d01c67ac417cde6cc62fdJohn McCall !isEndOfMacro && !(CurLexer && CurLexer->Is_PragmaLexer)) { 2578dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(PragmaARCCFCodeAuditedLoc, diag::err_pp_eof_in_arc_cf_code_audited); 2588dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2598dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Recover by leaving immediately. 2608dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall PragmaARCCFCodeAuditedLoc = SourceLocation(); 2618dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall } 2628dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If this is a #include'd file, pop it off the include stack and continue 2648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexing the #includer file. 2658c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!IncludeMacroStack.empty()) { 2667d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2677d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis // If we lexed the code-completion file, act as if we reached EOF. 2687d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && CurPPLexer && 2697d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getLocForStartOfFile(CurPPLexer->getFileID()) == 2707d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc) { 2717d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer) { 2727d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis Result.startToken(); 2737d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer->FormTokenWithChars(Result, CurLexer->BufferEnd, tok::eof); 2747d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer.reset(); 2757d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } else { 2767d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis assert(CurPTHLexer && "Got EOF but no current lexer set!"); 2777d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer->getEOF(Result); 2787d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer.reset(); 2797d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2807d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2817d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPPLexer = 0; 2827d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis return true; 2837d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2847d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 285d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis if (!isEndOfMacro && CurPPLexer && 286d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.getIncludeLoc(CurPPLexer->getFileID()).isValid()) { 287d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // Notify SourceManager to record the number of FileIDs that were created 288d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // during lexing of the #include'd file. 289d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis unsigned NumFIDs = 290d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.local_sloc_entry_size() - 291d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis CurPPLexer->getInitialNumSLocEntries() + 1/*#include'd file*/; 292d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.setNumCreatedFIDsForFileID(CurPPLexer->getFileID(), NumFIDs); 293d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis } 294d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis 295c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis FileID ExitedFID; 296c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis if (Callbacks && !isEndOfMacro && CurPPLexer) 297c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis ExitedFID = CurPPLexer->getFileID(); 298c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis 2998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We're done with the #included file. 3008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner RemoveTopOfLexerStack(); 3018c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 3031a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (Callbacks && !isEndOfMacro && CurPPLexer) { 3049d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 3058c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(CurPPLexer->getSourceLocation()); 3068c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 307c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis PPCallbacks::ExitFile, FileType, ExitedFID); 3088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Client should lex another token. 3118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 3128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If the file ends with a newline, form the EOF token on the newline itself, 3158c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // rather than "on the line following it", which doesn't exist. This makes 3168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // diagnostics relating to the end of file include the last file that the user 3178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // actually typed, which is goodness. 3181a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurLexer) { 3191a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek const char *EndPos = CurLexer->BufferEnd; 3201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3211a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r')) { 3228c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner --EndPos; 3231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3241a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek // Handle \n\r and \r\n: 3251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3261a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r') && 3271a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek EndPos[-1] != EndPos[0]) 3281a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek --EndPos; 3291a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek } 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3311a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek Result.startToken(); 3321a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->BufferPtr = EndPos; 3331a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->FormTokenWithChars(Result, EndPos, tok::eof); 3341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 335bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis if (isCodeCompletionEnabled()) { 336bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Inserting the code-completion point increases the source buffer by 1, 337bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // but the main FileID was created before inserting the point. 338bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Compensate by reducing the EOF location by 1, otherwise the location 339bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // will point to the next FileID. 340bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // FIXME: This is hacky, the code-completion point should probably be 341bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // inserted before the main FileID is created. 342bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis if (CurLexer->getFileLoc() == CodeCompletionFileLoc) 343bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis Result.setLocation(Result.getLocation().getLocWithOffset(-1)); 344bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis } 345bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 346e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann if (!isIncrementalProcessingEnabled()) 347e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann // We're done with lexing. 348e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann CurLexer.reset(); 34967116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner } else { 35067116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner assert(CurPTHLexer && "Got EOF but no current lexer set!"); 35159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek CurPTHLexer->getEOF(Result); 3521a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPTHLexer.reset(); 3538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 354e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann 355e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann if (!isIncrementalProcessingEnabled()) 356e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann CurPPLexer = 0; 3578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3580827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // This is the end of the top-level file. 'WarnUnusedMacroLocs' has collected 3590827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // all macro locations that we need to warn because they are not used. 3600827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis for (WarnUnusedMacroLocsTy::iterator 3610827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis I=WarnUnusedMacroLocs.begin(), E=WarnUnusedMacroLocs.end(); I!=E; ++I) 3620827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diag(*I, diag::pp_macro_not_used); 363dbd8209b33e6c9f151e4913a9c095d64a95439c4Daniel Dunbar 364585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // If we are building a module that has an umbrella header, make sure that 365585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // each of the headers within the directory covered by the umbrella header 366585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // was actually included by the umbrella header. 367585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Module *Mod = getCurrentModule()) { 368585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Mod->getUmbrellaHeader()) { 369585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor SourceLocation StartLoc 370585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor = SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID()); 371585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 372585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (getDiagnostics().getDiagnosticLevel( 373585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor diag::warn_uncovered_module_header, 374585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StartLoc) != DiagnosticsEngine::Ignored) { 37551f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor ModuleMap &ModMap = getHeaderSearchInfo().getModuleMap(); 376224bfeeaf046103937a5d1c8f8a9a7b79c6c14edDouglas Gregor typedef llvm::sys::fs::recursive_directory_iterator 377585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor recursive_directory_iterator; 378585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const DirectoryEntry *Dir = Mod->getUmbrellaDir(); 379585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::error_code EC; 380585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor for (recursive_directory_iterator Entry(Dir->getName(), EC), End; 381585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Entry != End && !EC; Entry.increment(EC)) { 382585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor using llvm::StringSwitch; 383585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 38451f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor // Check whether this entry has an extension typically associated with 385585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // headers. 386585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (!StringSwitch<bool>(llvm::sys::path::extension(Entry->path())) 38751f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor .Cases(".h", ".H", ".hh", ".hpp", true) 38851f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor .Default(false)) 389585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor continue; 390585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 391585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (const FileEntry *Header = getFileManager().getFile(Entry->path())) 392585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (!getSourceManager().hasFileInfo(Header)) { 39351f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor if (!ModMap.isHeaderInUnavailableModule(Header)) { 39451f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor // Find the relative path that would access this header. 395f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<128> RelativePath; 39651f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor computeRelativePath(FileMgr, Dir, Header, RelativePath); 39751f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor Diag(StartLoc, diag::warn_uncovered_module_header) 398c9c3907e66659e4457593fdec4a27c671c12e041Douglas Gregor << Mod->getFullModuleName() << RelativePath; 39951f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor } 400585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 401585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 402585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 403585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 404585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 405585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 4068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 4078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 4088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfTokenLexer - This callback is invoked when the current TokenLexer 4108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// hits the end of its token stream. 4118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfTokenLexer(Token &Result) { 4121a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 4138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a macro when currently in a #include file!"); 4148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4155b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis if (!MacroExpandingLexersStack.empty() && 4165b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis MacroExpandingLexersStack.back().first == CurTokenLexer.get()) 4175b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis removeCachedMacroExpandedTokensOfLastLexer(); 4185b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis 4198c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 4208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 421caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 4228c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 423caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 4248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Handle this like a #include file being popped off the stack. 4268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return HandleEndOfFile(Result, true); 4278c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 4288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// RemoveTopOfLexerStack - Pop the current lexer/macro exp off the top of the 4308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// lexer stack. This should only be used in situations where the current 4318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state of the top-of-stack lexer is unknown. 4328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::RemoveTopOfLexerStack() { 4338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!IncludeMacroStack.empty() && "Ran out of stack entries to load"); 4341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (CurTokenLexer) { 4368c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 4378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 438caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 4398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 440caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 443ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PopIncludeMacroStack(); 4448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 4458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleMicrosoftCommentPaste - When the macro expander pastes together a 4478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// comment (/##/) in microsoft mode, this method handles updating the current 4488c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state, returning the token on the next source line. 4498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::HandleMicrosoftCommentPaste(Token &Tok) { 4501a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 4518c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Pasted comment can only be formed from macro"); 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We handle this by scanning for the closest real lexer, switching it to 4548c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // raw mode and preprocessor mode. This will cause it to return \n as an 45584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // explicit EOD token. 4561a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek PreprocessorLexer *FoundLexer = 0; 4578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner bool LexerWasInPPMode = false; 4588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 4598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner IncludeStackInfo &ISI = *(IncludeMacroStack.end()-i-1); 4601a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (ISI.ThePPLexer == 0) continue; // Scan for a real lexer. 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Once we find a real lexer, mark it as raw mode (disabling macro 46384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // expansions) and preprocessor mode (return EOD). We know that the lexer 4648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // was *not* in raw mode before, because the macro that the comment came 4658c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // from was expanded. However, it could have already been in preprocessor 4668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // mode (#if COMMENT) in which case we have to return it to that mode and 46784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // return EOD. 4681a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek FoundLexer = ISI.ThePPLexer; 4698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = true; 4708c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner LexerWasInPPMode = FoundLexer->ParsingPreprocessorDirective; 4718c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = true; 4728c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner break; 4738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4758c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Okay, we either found and switched over the lexer, or we didn't find a 4768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexer. In either case, finish off the macro the comment came from, getting 4778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // the next token. 4788c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!HandleEndOfTokenLexer(Tok)) Lex(Tok); 4791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 48084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Discarding comments as long as we don't have EOF or EOD. This 'comments 4818c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // out' the rest of the line, including any tokens that came from other macros 4828c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // that were active, as in: 4838c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // #define submacro a COMMENT b 4848c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // submacro c 4858c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // which should lex to 'a' only: 'b' and 'c' should be removed. 48684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod) && Tok.isNot(tok::eof)) 4878c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Lex(Tok); 4881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 48984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we got an eod token, then we successfully found the end of the line. 49084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 4918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(FoundLexer && "Can't get end of line without an active lexer"); 4928c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Restore the lexer back to normal mode instead of raw mode. 4938c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = false; 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the lexer was already in preprocessor mode, just return the EOD token 4968c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // to finish the preprocessor line. 4978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (LexerWasInPPMode) return; 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Otherwise, switch out of PP mode and return the next lexed token. 5008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = false; 5018c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return Lex(Tok); 5028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If we got an EOF token, then we reached the end of the token stream but 5058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // didn't find an explicit \n. This can only happen if there was no lexer 50684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // active (an active lexer would return EOD at EOF if there was no \n in 5078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // preprocessor directive mode), so just return EOF as our token. 50884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne assert(!FoundLexer && "Lexer should return EOD before EOF in PP mode"); 5098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 510