Pragma.cpp revision 4e4d08403ca5cfd4d558fa2936215d3a4e5a528d
1//===--- Pragma.cpp - Pragma registration and handling --------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the PragmaHandler/PragmaTable interfaces and implements 11// pragma related methods of the Preprocessor class. 12// 13//===----------------------------------------------------------------------===// 14 15#include "clang/Lex/Pragma.h" 16#include "clang/Lex/HeaderSearch.h" 17#include "clang/Lex/LiteralSupport.h" 18#include "clang/Lex/Preprocessor.h" 19#include "clang/Lex/MacroInfo.h" 20#include "clang/Lex/LexDiagnostic.h" 21#include "clang/Basic/FileManager.h" 22#include "clang/Basic/SourceManager.h" 23#include "llvm/Support/CrashRecoveryContext.h" 24#include "llvm/Support/ErrorHandling.h" 25#include <algorithm> 26using namespace clang; 27 28// Out-of-line destructor to provide a home for the class. 29PragmaHandler::~PragmaHandler() { 30} 31 32//===----------------------------------------------------------------------===// 33// EmptyPragmaHandler Implementation. 34//===----------------------------------------------------------------------===// 35 36EmptyPragmaHandler::EmptyPragmaHandler() {} 37 38void EmptyPragmaHandler::HandlePragma(Preprocessor &PP, 39 PragmaIntroducerKind Introducer, 40 Token &FirstToken) {} 41 42//===----------------------------------------------------------------------===// 43// PragmaNamespace Implementation. 44//===----------------------------------------------------------------------===// 45 46 47PragmaNamespace::~PragmaNamespace() { 48 for (llvm::StringMap<PragmaHandler*>::iterator 49 I = Handlers.begin(), E = Handlers.end(); I != E; ++I) 50 delete I->second; 51} 52 53/// FindHandler - Check to see if there is already a handler for the 54/// specified name. If not, return the handler for the null identifier if it 55/// exists, otherwise return null. If IgnoreNull is true (the default) then 56/// the null handler isn't returned on failure to match. 57PragmaHandler *PragmaNamespace::FindHandler(StringRef Name, 58 bool IgnoreNull) const { 59 if (PragmaHandler *Handler = Handlers.lookup(Name)) 60 return Handler; 61 return IgnoreNull ? 0 : Handlers.lookup(StringRef()); 62} 63 64void PragmaNamespace::AddPragma(PragmaHandler *Handler) { 65 assert(!Handlers.lookup(Handler->getName()) && 66 "A handler with this name is already registered in this namespace"); 67 llvm::StringMapEntry<PragmaHandler *> &Entry = 68 Handlers.GetOrCreateValue(Handler->getName()); 69 Entry.setValue(Handler); 70} 71 72void PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { 73 assert(Handlers.lookup(Handler->getName()) && 74 "Handler not registered in this namespace"); 75 Handlers.erase(Handler->getName()); 76} 77 78void PragmaNamespace::HandlePragma(Preprocessor &PP, 79 PragmaIntroducerKind Introducer, 80 Token &Tok) { 81 // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro 82 // expand it, the user can have a STDC #define, that should not affect this. 83 PP.LexUnexpandedToken(Tok); 84 85 // Get the handler for this token. If there is no handler, ignore the pragma. 86 PragmaHandler *Handler 87 = FindHandler(Tok.getIdentifierInfo() ? Tok.getIdentifierInfo()->getName() 88 : StringRef(), 89 /*IgnoreNull=*/false); 90 if (Handler == 0) { 91 PP.Diag(Tok, diag::warn_pragma_ignored); 92 return; 93 } 94 95 // Otherwise, pass it down. 96 Handler->HandlePragma(PP, Introducer, Tok); 97} 98 99//===----------------------------------------------------------------------===// 100// Preprocessor Pragma Directive Handling. 101//===----------------------------------------------------------------------===// 102 103/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 104/// rest of the pragma, passing it to the registered pragma handlers. 105void Preprocessor::HandlePragmaDirective(unsigned Introducer) { 106 ++NumPragma; 107 108 // Invoke the first level of pragma handlers which reads the namespace id. 109 Token Tok; 110 PragmaHandlers->HandlePragma(*this, PragmaIntroducerKind(Introducer), Tok); 111 112 // If the pragma handler didn't read the rest of the line, consume it now. 113 if ((CurTokenLexer && CurTokenLexer->isParsingPreprocessorDirective()) 114 || (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective)) 115 DiscardUntilEndOfDirective(); 116} 117 118/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 119/// return the first token after the directive. The _Pragma token has just 120/// been read into 'Tok'. 121void Preprocessor::Handle_Pragma(Token &Tok) { 122 // Remember the pragma token location. 123 SourceLocation PragmaLoc = Tok.getLocation(); 124 125 // Read the '('. 126 Lex(Tok); 127 if (Tok.isNot(tok::l_paren)) { 128 Diag(PragmaLoc, diag::err__Pragma_malformed); 129 return; 130 } 131 132 // Read the '"..."'. 133 Lex(Tok); 134 if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 135 Diag(PragmaLoc, diag::err__Pragma_malformed); 136 // Skip this token, and the ')', if present. 137 if (Tok.isNot(tok::r_paren)) 138 Lex(Tok); 139 if (Tok.is(tok::r_paren)) 140 Lex(Tok); 141 return; 142 } 143 144 if (Tok.hasUDSuffix()) { 145 Diag(Tok, diag::err_invalid_string_udl); 146 // Skip this token, and the ')', if present. 147 Lex(Tok); 148 if (Tok.is(tok::r_paren)) 149 Lex(Tok); 150 return; 151 } 152 153 // Remember the string. 154 std::string StrVal = getSpelling(Tok); 155 156 // Read the ')'. 157 Lex(Tok); 158 if (Tok.isNot(tok::r_paren)) { 159 Diag(PragmaLoc, diag::err__Pragma_malformed); 160 return; 161 } 162 163 SourceLocation RParenLoc = Tok.getLocation(); 164 165 // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1: 166 // "The string literal is destringized by deleting the L prefix, if present, 167 // deleting the leading and trailing double-quotes, replacing each escape 168 // sequence \" by a double-quote, and replacing each escape sequence \\ by a 169 // single backslash." 170 if (StrVal[0] == 'L') // Remove L prefix. 171 StrVal.erase(StrVal.begin()); 172 assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 173 "Invalid string token!"); 174 175 // Remove the front quote, replacing it with a space, so that the pragma 176 // contents appear to have a space before them. 177 StrVal[0] = ' '; 178 179 // Replace the terminating quote with a \n. 180 StrVal[StrVal.size()-1] = '\n'; 181 182 // Remove escaped quotes and escapes. 183 for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 184 if (StrVal[i] == '\\' && 185 (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 186 // \\ -> '\' and \" -> '"'. 187 StrVal.erase(StrVal.begin()+i); 188 --e; 189 } 190 } 191 192 // Plop the string (including the newline and trailing null) into a buffer 193 // where we can lex it. 194 Token TmpTok; 195 TmpTok.startToken(); 196 CreateString(&StrVal[0], StrVal.size(), TmpTok); 197 SourceLocation TokLoc = TmpTok.getLocation(); 198 199 // Make and enter a lexer object so that we lex and expand the tokens just 200 // like any others. 201 Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, 202 StrVal.size(), *this); 203 204 EnterSourceFileWithLexer(TL, 0); 205 206 // With everything set up, lex this as a #pragma directive. 207 HandlePragmaDirective(PIK__Pragma); 208 209 // Finally, return whatever came after the pragma directive. 210 return Lex(Tok); 211} 212 213/// HandleMicrosoft__pragma - Like Handle_Pragma except the pragma text 214/// is not enclosed within a string literal. 215void Preprocessor::HandleMicrosoft__pragma(Token &Tok) { 216 // Remember the pragma token location. 217 SourceLocation PragmaLoc = Tok.getLocation(); 218 219 // Read the '('. 220 Lex(Tok); 221 if (Tok.isNot(tok::l_paren)) { 222 Diag(PragmaLoc, diag::err__Pragma_malformed); 223 return; 224 } 225 226 // Get the tokens enclosed within the __pragma(), as well as the final ')'. 227 SmallVector<Token, 32> PragmaToks; 228 int NumParens = 0; 229 Lex(Tok); 230 while (Tok.isNot(tok::eof)) { 231 PragmaToks.push_back(Tok); 232 if (Tok.is(tok::l_paren)) 233 NumParens++; 234 else if (Tok.is(tok::r_paren) && NumParens-- == 0) 235 break; 236 Lex(Tok); 237 } 238 239 if (Tok.is(tok::eof)) { 240 Diag(PragmaLoc, diag::err_unterminated___pragma); 241 return; 242 } 243 244 PragmaToks.front().setFlag(Token::LeadingSpace); 245 246 // Replace the ')' with an EOD to mark the end of the pragma. 247 PragmaToks.back().setKind(tok::eod); 248 249 Token *TokArray = new Token[PragmaToks.size()]; 250 std::copy(PragmaToks.begin(), PragmaToks.end(), TokArray); 251 252 // Push the tokens onto the stack. 253 EnterTokenStream(TokArray, PragmaToks.size(), true, true); 254 255 // With everything set up, lex this as a #pragma directive. 256 HandlePragmaDirective(PIK___pragma); 257 258 // Finally, return whatever came after the pragma directive. 259 return Lex(Tok); 260} 261 262/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 263/// 264void Preprocessor::HandlePragmaOnce(Token &OnceTok) { 265 if (isInPrimaryFile()) { 266 Diag(OnceTok, diag::pp_pragma_once_in_main_file); 267 return; 268 } 269 270 // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 271 // Mark the file as a once-only file now. 272 HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); 273} 274 275void Preprocessor::HandlePragmaMark() { 276 assert(CurPPLexer && "No current lexer?"); 277 if (CurLexer) 278 CurLexer->ReadToEndOfLine(); 279 else 280 CurPTHLexer->DiscardToEndOfLine(); 281} 282 283 284/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 285/// 286void Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 287 Token Tok; 288 289 while (1) { 290 // Read the next token to poison. While doing this, pretend that we are 291 // skipping while reading the identifier to poison. 292 // This avoids errors on code like: 293 // #pragma GCC poison X 294 // #pragma GCC poison X 295 if (CurPPLexer) CurPPLexer->LexingRawMode = true; 296 LexUnexpandedToken(Tok); 297 if (CurPPLexer) CurPPLexer->LexingRawMode = false; 298 299 // If we reached the end of line, we're done. 300 if (Tok.is(tok::eod)) return; 301 302 // Can only poison identifiers. 303 if (Tok.isNot(tok::raw_identifier)) { 304 Diag(Tok, diag::err_pp_invalid_poison); 305 return; 306 } 307 308 // Look up the identifier info for the token. We disabled identifier lookup 309 // by saying we're skipping contents, so we need to do this manually. 310 IdentifierInfo *II = LookUpIdentifierInfo(Tok); 311 312 // Already poisoned. 313 if (II->isPoisoned()) continue; 314 315 // If this is a macro identifier, emit a warning. 316 if (II->hasMacroDefinition()) 317 Diag(Tok, diag::pp_poisoning_existing_macro); 318 319 // Finally, poison it! 320 II->setIsPoisoned(); 321 if (II->isFromAST()) 322 II->setChangedSinceDeserialization(); 323 } 324} 325 326/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 327/// that the whole directive has been parsed. 328void Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 329 if (isInPrimaryFile()) { 330 Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 331 return; 332 } 333 334 // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 335 PreprocessorLexer *TheLexer = getCurrentFileLexer(); 336 337 // Mark the file as a system header. 338 HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); 339 340 341 PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation()); 342 if (PLoc.isInvalid()) 343 return; 344 345 unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename()); 346 347 // Notify the client, if desired, that we are in a new source file. 348 if (Callbacks) 349 Callbacks->FileChanged(SysHeaderTok.getLocation(), 350 PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); 351 352 // Emit a line marker. This will change any source locations from this point 353 // forward to realize they are in a system header. 354 // Create a line note with this information. 355 SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine(), FilenameID, 356 false, false, true, false); 357} 358 359/// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah. 360/// 361void Preprocessor::HandlePragmaDependency(Token &DependencyTok) { 362 Token FilenameTok; 363 CurPPLexer->LexIncludeFilename(FilenameTok); 364 365 // If the token kind is EOD, the error has already been diagnosed. 366 if (FilenameTok.is(tok::eod)) 367 return; 368 369 // Reserve a buffer to get the spelling. 370 SmallString<128> FilenameBuffer; 371 bool Invalid = false; 372 StringRef Filename = getSpelling(FilenameTok, FilenameBuffer, &Invalid); 373 if (Invalid) 374 return; 375 376 bool isAngled = 377 GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 378 // If GetIncludeFilenameSpelling set the start ptr to null, there was an 379 // error. 380 if (Filename.empty()) 381 return; 382 383 // Search include directories for this file. 384 const DirectoryLookup *CurDir; 385 const FileEntry *File = LookupFile(Filename, isAngled, 0, CurDir, NULL, NULL, 386 NULL); 387 if (File == 0) { 388 if (!SuppressIncludeNotFoundError) 389 Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; 390 return; 391 } 392 393 const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); 394 395 // If this file is older than the file it depends on, emit a diagnostic. 396 if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 397 // Lex tokens at the end of the message and include them in the message. 398 std::string Message; 399 Lex(DependencyTok); 400 while (DependencyTok.isNot(tok::eod)) { 401 Message += getSpelling(DependencyTok) + " "; 402 Lex(DependencyTok); 403 } 404 405 // Remove the trailing ' ' if present. 406 if (!Message.empty()) 407 Message.erase(Message.end()-1); 408 Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 409 } 410} 411 412/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 413/// syntax is: 414/// #pragma comment(linker, "foo") 415/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 416/// "foo" is a string, which is fully macro expanded, and permits string 417/// concatenation, embedded escape characters etc. See MSDN for more details. 418void Preprocessor::HandlePragmaComment(Token &Tok) { 419 SourceLocation CommentLoc = Tok.getLocation(); 420 Lex(Tok); 421 if (Tok.isNot(tok::l_paren)) { 422 Diag(CommentLoc, diag::err_pragma_comment_malformed); 423 return; 424 } 425 426 // Read the identifier. 427 Lex(Tok); 428 if (Tok.isNot(tok::identifier)) { 429 Diag(CommentLoc, diag::err_pragma_comment_malformed); 430 return; 431 } 432 433 // Verify that this is one of the 5 whitelisted options. 434 // FIXME: warn that 'exestr' is deprecated. 435 const IdentifierInfo *II = Tok.getIdentifierInfo(); 436 if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 437 !II->isStr("linker") && !II->isStr("user")) { 438 Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 439 return; 440 } 441 442 // Read the optional string if present. 443 Lex(Tok); 444 std::string ArgumentString; 445 if (Tok.is(tok::comma)) { 446 Lex(Tok); // eat the comma. 447 448 // We need at least one string. 449 if (Tok.isNot(tok::string_literal)) { 450 Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 451 return; 452 } 453 454 // String concatenation allows multiple strings, which can even come from 455 // macro expansion. 456 // "foo " "bar" "Baz" 457 SmallVector<Token, 4> StrToks; 458 while (Tok.is(tok::string_literal)) { 459 if (Tok.hasUDSuffix()) 460 Diag(Tok, diag::err_invalid_string_udl); 461 StrToks.push_back(Tok); 462 Lex(Tok); 463 } 464 465 // Concatenate and parse the strings. 466 StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 467 assert(Literal.isAscii() && "Didn't allow wide strings in"); 468 if (Literal.hadError) 469 return; 470 if (Literal.Pascal) { 471 Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed); 472 return; 473 } 474 475 ArgumentString = Literal.GetString(); 476 } 477 478 // FIXME: If the kind is "compiler" warn if the string is present (it is 479 // ignored). 480 // FIXME: 'lib' requires a comment string. 481 // FIXME: 'linker' requires a comment string, and has a specific list of 482 // things that are allowable. 483 484 if (Tok.isNot(tok::r_paren)) { 485 Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 486 return; 487 } 488 Lex(Tok); // eat the r_paren. 489 490 if (Tok.isNot(tok::eod)) { 491 Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 492 return; 493 } 494 495 // If the pragma is lexically sound, notify any interested PPCallbacks. 496 if (Callbacks) 497 Callbacks->PragmaComment(CommentLoc, II, ArgumentString); 498} 499 500/// HandlePragmaMessage - Handle the microsoft and gcc #pragma message 501/// extension. The syntax is: 502/// #pragma message(string) 503/// OR, in GCC mode: 504/// #pragma message string 505/// string is a string, which is fully macro expanded, and permits string 506/// concatenation, embedded escape characters, etc... See MSDN for more details. 507void Preprocessor::HandlePragmaMessage(Token &Tok) { 508 SourceLocation MessageLoc = Tok.getLocation(); 509 Lex(Tok); 510 bool ExpectClosingParen = false; 511 switch (Tok.getKind()) { 512 case tok::l_paren: 513 // We have a MSVC style pragma message. 514 ExpectClosingParen = true; 515 // Read the string. 516 Lex(Tok); 517 break; 518 case tok::string_literal: 519 // We have a GCC style pragma message, and we just read the string. 520 break; 521 default: 522 Diag(MessageLoc, diag::err_pragma_message_malformed); 523 return; 524 } 525 526 // We need at least one string. 527 if (Tok.isNot(tok::string_literal)) { 528 Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 529 return; 530 } 531 532 // String concatenation allows multiple strings, which can even come from 533 // macro expansion. 534 // "foo " "bar" "Baz" 535 SmallVector<Token, 4> StrToks; 536 while (Tok.is(tok::string_literal)) { 537 if (Tok.hasUDSuffix()) 538 Diag(Tok, diag::err_invalid_string_udl); 539 StrToks.push_back(Tok); 540 Lex(Tok); 541 } 542 543 // Concatenate and parse the strings. 544 StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 545 assert(Literal.isAscii() && "Didn't allow wide strings in"); 546 if (Literal.hadError) 547 return; 548 if (Literal.Pascal) { 549 Diag(StrToks[0].getLocation(), diag::err_pragma_message_malformed); 550 return; 551 } 552 553 StringRef MessageString(Literal.GetString()); 554 555 if (ExpectClosingParen) { 556 if (Tok.isNot(tok::r_paren)) { 557 Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 558 return; 559 } 560 Lex(Tok); // eat the r_paren. 561 } 562 563 if (Tok.isNot(tok::eod)) { 564 Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 565 return; 566 } 567 568 // Output the message. 569 Diag(MessageLoc, diag::warn_pragma_message) << MessageString; 570 571 // If the pragma is lexically sound, notify any interested PPCallbacks. 572 if (Callbacks) 573 Callbacks->PragmaMessage(MessageLoc, MessageString); 574} 575 576/// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro. 577/// Return the IdentifierInfo* associated with the macro to push or pop. 578IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) { 579 // Remember the pragma token location. 580 Token PragmaTok = Tok; 581 582 // Read the '('. 583 Lex(Tok); 584 if (Tok.isNot(tok::l_paren)) { 585 Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 586 << getSpelling(PragmaTok); 587 return 0; 588 } 589 590 // Read the macro name string. 591 Lex(Tok); 592 if (Tok.isNot(tok::string_literal)) { 593 Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 594 << getSpelling(PragmaTok); 595 return 0; 596 } 597 598 if (Tok.hasUDSuffix()) { 599 Diag(Tok, diag::err_invalid_string_udl); 600 return 0; 601 } 602 603 // Remember the macro string. 604 std::string StrVal = getSpelling(Tok); 605 606 // Read the ')'. 607 Lex(Tok); 608 if (Tok.isNot(tok::r_paren)) { 609 Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 610 << getSpelling(PragmaTok); 611 return 0; 612 } 613 614 assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 615 "Invalid string token!"); 616 617 // Create a Token from the string. 618 Token MacroTok; 619 MacroTok.startToken(); 620 MacroTok.setKind(tok::raw_identifier); 621 CreateString(&StrVal[1], StrVal.size() - 2, MacroTok); 622 623 // Get the IdentifierInfo of MacroToPushTok. 624 return LookUpIdentifierInfo(MacroTok); 625} 626 627/// HandlePragmaPushMacro - Handle #pragma push_macro. 628/// The syntax is: 629/// #pragma push_macro("macro") 630void Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) { 631 // Parse the pragma directive and get the macro IdentifierInfo*. 632 IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok); 633 if (!IdentInfo) return; 634 635 // Get the MacroInfo associated with IdentInfo. 636 MacroInfo *MI = getMacroInfo(IdentInfo); 637 638 MacroInfo *MacroCopyToPush = 0; 639 if (MI) { 640 // Make a clone of MI. 641 MacroCopyToPush = CloneMacroInfo(*MI); 642 643 // Allow the original MacroInfo to be redefined later. 644 MI->setIsAllowRedefinitionsWithoutWarning(true); 645 } 646 647 // Push the cloned MacroInfo so we can retrieve it later. 648 PragmaPushMacroInfo[IdentInfo].push_back(MacroCopyToPush); 649} 650 651/// HandlePragmaPopMacro - Handle #pragma pop_macro. 652/// The syntax is: 653/// #pragma pop_macro("macro") 654void Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) { 655 SourceLocation MessageLoc = PopMacroTok.getLocation(); 656 657 // Parse the pragma directive and get the macro IdentifierInfo*. 658 IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok); 659 if (!IdentInfo) return; 660 661 // Find the vector<MacroInfo*> associated with the macro. 662 llvm::DenseMap<IdentifierInfo*, std::vector<MacroInfo*> >::iterator iter = 663 PragmaPushMacroInfo.find(IdentInfo); 664 if (iter != PragmaPushMacroInfo.end()) { 665 // Release the MacroInfo currently associated with IdentInfo. 666 MacroInfo *CurrentMI = getMacroInfo(IdentInfo); 667 if (CurrentMI) { 668 if (CurrentMI->isWarnIfUnused()) 669 WarnUnusedMacroLocs.erase(CurrentMI->getDefinitionLoc()); 670 ReleaseMacroInfo(CurrentMI); 671 } 672 673 // Get the MacroInfo we want to reinstall. 674 MacroInfo *MacroToReInstall = iter->second.back(); 675 676 // Reinstall the previously pushed macro. 677 setMacroInfo(IdentInfo, MacroToReInstall); 678 679 // Pop PragmaPushMacroInfo stack. 680 iter->second.pop_back(); 681 if (iter->second.size() == 0) 682 PragmaPushMacroInfo.erase(iter); 683 } else { 684 Diag(MessageLoc, diag::warn_pragma_pop_macro_no_push) 685 << IdentInfo->getName(); 686 } 687} 688 689void Preprocessor::HandlePragmaIncludeAlias(Token &Tok) { 690 // We will either get a quoted filename or a bracketed filename, and we 691 // have to track which we got. The first filename is the source name, 692 // and the second name is the mapped filename. If the first is quoted, 693 // the second must be as well (cannot mix and match quotes and brackets). 694 695 // Get the open paren 696 Lex(Tok); 697 if (Tok.isNot(tok::l_paren)) { 698 Diag(Tok, diag::warn_pragma_include_alias_expected) << "("; 699 return; 700 } 701 702 // We expect either a quoted string literal, or a bracketed name 703 Token SourceFilenameTok; 704 CurPPLexer->LexIncludeFilename(SourceFilenameTok); 705 if (SourceFilenameTok.is(tok::eod)) { 706 // The diagnostic has already been handled 707 return; 708 } 709 710 StringRef SourceFileName; 711 SmallString<128> FileNameBuffer; 712 if (SourceFilenameTok.is(tok::string_literal) || 713 SourceFilenameTok.is(tok::angle_string_literal)) { 714 SourceFileName = getSpelling(SourceFilenameTok, FileNameBuffer); 715 } else if (SourceFilenameTok.is(tok::less)) { 716 // This could be a path instead of just a name 717 FileNameBuffer.push_back('<'); 718 SourceLocation End; 719 if (ConcatenateIncludeName(FileNameBuffer, End)) 720 return; // Diagnostic already emitted 721 SourceFileName = FileNameBuffer.str(); 722 } else { 723 Diag(Tok, diag::warn_pragma_include_alias_expected_filename); 724 return; 725 } 726 FileNameBuffer.clear(); 727 728 // Now we expect a comma, followed by another include name 729 Lex(Tok); 730 if (Tok.isNot(tok::comma)) { 731 Diag(Tok, diag::warn_pragma_include_alias_expected) << ","; 732 return; 733 } 734 735 Token ReplaceFilenameTok; 736 CurPPLexer->LexIncludeFilename(ReplaceFilenameTok); 737 if (ReplaceFilenameTok.is(tok::eod)) { 738 // The diagnostic has already been handled 739 return; 740 } 741 742 StringRef ReplaceFileName; 743 if (ReplaceFilenameTok.is(tok::string_literal) || 744 ReplaceFilenameTok.is(tok::angle_string_literal)) { 745 ReplaceFileName = getSpelling(ReplaceFilenameTok, FileNameBuffer); 746 } else if (ReplaceFilenameTok.is(tok::less)) { 747 // This could be a path instead of just a name 748 FileNameBuffer.push_back('<'); 749 SourceLocation End; 750 if (ConcatenateIncludeName(FileNameBuffer, End)) 751 return; // Diagnostic already emitted 752 ReplaceFileName = FileNameBuffer.str(); 753 } else { 754 Diag(Tok, diag::warn_pragma_include_alias_expected_filename); 755 return; 756 } 757 758 // Finally, we expect the closing paren 759 Lex(Tok); 760 if (Tok.isNot(tok::r_paren)) { 761 Diag(Tok, diag::warn_pragma_include_alias_expected) << ")"; 762 return; 763 } 764 765 // Now that we have the source and target filenames, we need to make sure 766 // they're both of the same type (angled vs non-angled) 767 StringRef OriginalSource = SourceFileName; 768 769 bool SourceIsAngled = 770 GetIncludeFilenameSpelling(SourceFilenameTok.getLocation(), 771 SourceFileName); 772 bool ReplaceIsAngled = 773 GetIncludeFilenameSpelling(ReplaceFilenameTok.getLocation(), 774 ReplaceFileName); 775 if (!SourceFileName.empty() && !ReplaceFileName.empty() && 776 (SourceIsAngled != ReplaceIsAngled)) { 777 unsigned int DiagID; 778 if (SourceIsAngled) 779 DiagID = diag::warn_pragma_include_alias_mismatch_angle; 780 else 781 DiagID = diag::warn_pragma_include_alias_mismatch_quote; 782 783 Diag(SourceFilenameTok.getLocation(), DiagID) 784 << SourceFileName 785 << ReplaceFileName; 786 787 return; 788 } 789 790 // Now we can let the include handler know about this mapping 791 getHeaderSearchInfo().AddIncludeAlias(OriginalSource, ReplaceFileName); 792} 793 794/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 795/// If 'Namespace' is non-null, then it is a token required to exist on the 796/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 797void Preprocessor::AddPragmaHandler(StringRef Namespace, 798 PragmaHandler *Handler) { 799 PragmaNamespace *InsertNS = PragmaHandlers; 800 801 // If this is specified to be in a namespace, step down into it. 802 if (!Namespace.empty()) { 803 // If there is already a pragma handler with the name of this namespace, 804 // we either have an error (directive with the same name as a namespace) or 805 // we already have the namespace to insert into. 806 if (PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace)) { 807 InsertNS = Existing->getIfNamespace(); 808 assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 809 " handler with the same name!"); 810 } else { 811 // Otherwise, this namespace doesn't exist yet, create and insert the 812 // handler for it. 813 InsertNS = new PragmaNamespace(Namespace); 814 PragmaHandlers->AddPragma(InsertNS); 815 } 816 } 817 818 // Check to make sure we don't already have a pragma for this identifier. 819 assert(!InsertNS->FindHandler(Handler->getName()) && 820 "Pragma handler already exists for this identifier!"); 821 InsertNS->AddPragma(Handler); 822} 823 824/// RemovePragmaHandler - Remove the specific pragma handler from the 825/// preprocessor. If \arg Namespace is non-null, then it should be the 826/// namespace that \arg Handler was added to. It is an error to remove 827/// a handler that has not been registered. 828void Preprocessor::RemovePragmaHandler(StringRef Namespace, 829 PragmaHandler *Handler) { 830 PragmaNamespace *NS = PragmaHandlers; 831 832 // If this is specified to be in a namespace, step down into it. 833 if (!Namespace.empty()) { 834 PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace); 835 assert(Existing && "Namespace containing handler does not exist!"); 836 837 NS = Existing->getIfNamespace(); 838 assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 839 } 840 841 NS->RemovePragmaHandler(Handler); 842 843 // If this is a non-default namespace and it is now empty, remove 844 // it. 845 if (NS != PragmaHandlers && NS->IsEmpty()) { 846 PragmaHandlers->RemovePragmaHandler(NS); 847 delete NS; 848 } 849} 850 851bool Preprocessor::LexOnOffSwitch(tok::OnOffSwitch &Result) { 852 Token Tok; 853 LexUnexpandedToken(Tok); 854 855 if (Tok.isNot(tok::identifier)) { 856 Diag(Tok, diag::ext_on_off_switch_syntax); 857 return true; 858 } 859 IdentifierInfo *II = Tok.getIdentifierInfo(); 860 if (II->isStr("ON")) 861 Result = tok::OOS_ON; 862 else if (II->isStr("OFF")) 863 Result = tok::OOS_OFF; 864 else if (II->isStr("DEFAULT")) 865 Result = tok::OOS_DEFAULT; 866 else { 867 Diag(Tok, diag::ext_on_off_switch_syntax); 868 return true; 869 } 870 871 // Verify that this is followed by EOD. 872 LexUnexpandedToken(Tok); 873 if (Tok.isNot(tok::eod)) 874 Diag(Tok, diag::ext_pragma_syntax_eod); 875 return false; 876} 877 878namespace { 879/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 880struct PragmaOnceHandler : public PragmaHandler { 881 PragmaOnceHandler() : PragmaHandler("once") {} 882 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 883 Token &OnceTok) { 884 PP.CheckEndOfDirective("pragma once"); 885 PP.HandlePragmaOnce(OnceTok); 886 } 887}; 888 889/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 890/// rest of the line is not lexed. 891struct PragmaMarkHandler : public PragmaHandler { 892 PragmaMarkHandler() : PragmaHandler("mark") {} 893 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 894 Token &MarkTok) { 895 PP.HandlePragmaMark(); 896 } 897}; 898 899/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 900struct PragmaPoisonHandler : public PragmaHandler { 901 PragmaPoisonHandler() : PragmaHandler("poison") {} 902 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 903 Token &PoisonTok) { 904 PP.HandlePragmaPoison(PoisonTok); 905 } 906}; 907 908/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 909/// as a system header, which silences warnings in it. 910struct PragmaSystemHeaderHandler : public PragmaHandler { 911 PragmaSystemHeaderHandler() : PragmaHandler("system_header") {} 912 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 913 Token &SHToken) { 914 PP.HandlePragmaSystemHeader(SHToken); 915 PP.CheckEndOfDirective("pragma"); 916 } 917}; 918struct PragmaDependencyHandler : public PragmaHandler { 919 PragmaDependencyHandler() : PragmaHandler("dependency") {} 920 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 921 Token &DepToken) { 922 PP.HandlePragmaDependency(DepToken); 923 } 924}; 925 926struct PragmaDebugHandler : public PragmaHandler { 927 PragmaDebugHandler() : PragmaHandler("__debug") {} 928 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 929 Token &DepToken) { 930 Token Tok; 931 PP.LexUnexpandedToken(Tok); 932 if (Tok.isNot(tok::identifier)) { 933 PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); 934 return; 935 } 936 IdentifierInfo *II = Tok.getIdentifierInfo(); 937 938 if (II->isStr("assert")) { 939 llvm_unreachable("This is an assertion!"); 940 } else if (II->isStr("crash")) { 941 *(volatile int*) 0x11 = 0; 942 } else if (II->isStr("llvm_fatal_error")) { 943 llvm::report_fatal_error("#pragma clang __debug llvm_fatal_error"); 944 } else if (II->isStr("llvm_unreachable")) { 945 llvm_unreachable("#pragma clang __debug llvm_unreachable"); 946 } else if (II->isStr("overflow_stack")) { 947 DebugOverflowStack(); 948 } else if (II->isStr("handle_crash")) { 949 llvm::CrashRecoveryContext *CRC =llvm::CrashRecoveryContext::GetCurrent(); 950 if (CRC) 951 CRC->HandleCrash(); 952 } else { 953 PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command) 954 << II->getName(); 955 } 956 } 957 958// Disable MSVC warning about runtime stack overflow. 959#ifdef _MSC_VER 960 #pragma warning(disable : 4717) 961#endif 962 void DebugOverflowStack() { 963 DebugOverflowStack(); 964 } 965#ifdef _MSC_VER 966 #pragma warning(default : 4717) 967#endif 968 969}; 970 971/// PragmaDiagnosticHandler - e.g. '#pragma GCC diagnostic ignored "-Wformat"' 972struct PragmaDiagnosticHandler : public PragmaHandler { 973private: 974 const char *Namespace; 975public: 976 explicit PragmaDiagnosticHandler(const char *NS) : 977 PragmaHandler("diagnostic"), Namespace(NS) {} 978 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 979 Token &DiagToken) { 980 SourceLocation DiagLoc = DiagToken.getLocation(); 981 Token Tok; 982 PP.LexUnexpandedToken(Tok); 983 if (Tok.isNot(tok::identifier)) { 984 PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); 985 return; 986 } 987 IdentifierInfo *II = Tok.getIdentifierInfo(); 988 PPCallbacks *Callbacks = PP.getPPCallbacks(); 989 990 diag::Mapping Map; 991 if (II->isStr("warning")) 992 Map = diag::MAP_WARNING; 993 else if (II->isStr("error")) 994 Map = diag::MAP_ERROR; 995 else if (II->isStr("ignored")) 996 Map = diag::MAP_IGNORE; 997 else if (II->isStr("fatal")) 998 Map = diag::MAP_FATAL; 999 else if (II->isStr("pop")) { 1000 if (!PP.getDiagnostics().popMappings(DiagLoc)) 1001 PP.Diag(Tok, diag::warn_pragma_diagnostic_cannot_pop); 1002 else if (Callbacks) 1003 Callbacks->PragmaDiagnosticPop(DiagLoc, Namespace); 1004 return; 1005 } else if (II->isStr("push")) { 1006 PP.getDiagnostics().pushMappings(DiagLoc); 1007 if (Callbacks) 1008 Callbacks->PragmaDiagnosticPush(DiagLoc, Namespace); 1009 return; 1010 } else { 1011 PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); 1012 return; 1013 } 1014 1015 PP.LexUnexpandedToken(Tok); 1016 1017 // We need at least one string. 1018 if (Tok.isNot(tok::string_literal)) { 1019 PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 1020 return; 1021 } 1022 1023 // String concatenation allows multiple strings, which can even come from 1024 // macro expansion. 1025 // "foo " "bar" "Baz" 1026 SmallVector<Token, 4> StrToks; 1027 while (Tok.is(tok::string_literal)) { 1028 StrToks.push_back(Tok); 1029 PP.LexUnexpandedToken(Tok); 1030 } 1031 1032 if (Tok.isNot(tok::eod)) { 1033 PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 1034 return; 1035 } 1036 1037 // Concatenate and parse the strings. 1038 StringLiteralParser Literal(&StrToks[0], StrToks.size(), PP); 1039 assert(Literal.isAscii() && "Didn't allow wide strings in"); 1040 if (Literal.hadError) 1041 return; 1042 if (Literal.Pascal) { 1043 PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); 1044 return; 1045 } 1046 1047 StringRef WarningName(Literal.GetString()); 1048 1049 if (WarningName.size() < 3 || WarningName[0] != '-' || 1050 WarningName[1] != 'W') { 1051 PP.Diag(StrToks[0].getLocation(), 1052 diag::warn_pragma_diagnostic_invalid_option); 1053 return; 1054 } 1055 1056 if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.substr(2), 1057 Map, DiagLoc)) 1058 PP.Diag(StrToks[0].getLocation(), 1059 diag::warn_pragma_diagnostic_unknown_warning) << WarningName; 1060 else if (Callbacks) 1061 Callbacks->PragmaDiagnostic(DiagLoc, Namespace, Map, WarningName); 1062 } 1063}; 1064 1065/// PragmaCommentHandler - "#pragma comment ...". 1066struct PragmaCommentHandler : public PragmaHandler { 1067 PragmaCommentHandler() : PragmaHandler("comment") {} 1068 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1069 Token &CommentTok) { 1070 PP.HandlePragmaComment(CommentTok); 1071 } 1072}; 1073 1074/// PragmaIncludeAliasHandler - "#pragma include_alias("...")". 1075struct PragmaIncludeAliasHandler : public PragmaHandler { 1076 PragmaIncludeAliasHandler() : PragmaHandler("include_alias") {} 1077 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1078 Token &IncludeAliasTok) { 1079 PP.HandlePragmaIncludeAlias(IncludeAliasTok); 1080 } 1081}; 1082 1083/// PragmaMessageHandler - "#pragma message("...")". 1084struct PragmaMessageHandler : public PragmaHandler { 1085 PragmaMessageHandler() : PragmaHandler("message") {} 1086 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1087 Token &CommentTok) { 1088 PP.HandlePragmaMessage(CommentTok); 1089 } 1090}; 1091 1092/// PragmaPushMacroHandler - "#pragma push_macro" saves the value of the 1093/// macro on the top of the stack. 1094struct PragmaPushMacroHandler : public PragmaHandler { 1095 PragmaPushMacroHandler() : PragmaHandler("push_macro") {} 1096 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1097 Token &PushMacroTok) { 1098 PP.HandlePragmaPushMacro(PushMacroTok); 1099 } 1100}; 1101 1102 1103/// PragmaPopMacroHandler - "#pragma pop_macro" sets the value of the 1104/// macro to the value on the top of the stack. 1105struct PragmaPopMacroHandler : public PragmaHandler { 1106 PragmaPopMacroHandler() : PragmaHandler("pop_macro") {} 1107 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1108 Token &PopMacroTok) { 1109 PP.HandlePragmaPopMacro(PopMacroTok); 1110 } 1111}; 1112 1113// Pragma STDC implementations. 1114 1115/// PragmaSTDC_FENV_ACCESSHandler - "#pragma STDC FENV_ACCESS ...". 1116struct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler { 1117 PragmaSTDC_FENV_ACCESSHandler() : PragmaHandler("FENV_ACCESS") {} 1118 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1119 Token &Tok) { 1120 tok::OnOffSwitch OOS; 1121 if (PP.LexOnOffSwitch(OOS)) 1122 return; 1123 if (OOS == tok::OOS_ON) 1124 PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported); 1125 } 1126}; 1127 1128/// PragmaSTDC_CX_LIMITED_RANGEHandler - "#pragma STDC CX_LIMITED_RANGE ...". 1129struct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler { 1130 PragmaSTDC_CX_LIMITED_RANGEHandler() 1131 : PragmaHandler("CX_LIMITED_RANGE") {} 1132 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1133 Token &Tok) { 1134 tok::OnOffSwitch OOS; 1135 PP.LexOnOffSwitch(OOS); 1136 } 1137}; 1138 1139/// PragmaSTDC_UnknownHandler - "#pragma STDC ...". 1140struct PragmaSTDC_UnknownHandler : public PragmaHandler { 1141 PragmaSTDC_UnknownHandler() {} 1142 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1143 Token &UnknownTok) { 1144 // C99 6.10.6p2, unknown forms are not allowed. 1145 PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored); 1146 } 1147}; 1148 1149/// PragmaARCCFCodeAuditedHandler - 1150/// #pragma clang arc_cf_code_audited begin/end 1151struct PragmaARCCFCodeAuditedHandler : public PragmaHandler { 1152 PragmaARCCFCodeAuditedHandler() : PragmaHandler("arc_cf_code_audited") {} 1153 virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, 1154 Token &NameTok) { 1155 SourceLocation Loc = NameTok.getLocation(); 1156 bool IsBegin; 1157 1158 Token Tok; 1159 1160 // Lex the 'begin' or 'end'. 1161 PP.LexUnexpandedToken(Tok); 1162 const IdentifierInfo *BeginEnd = Tok.getIdentifierInfo(); 1163 if (BeginEnd && BeginEnd->isStr("begin")) { 1164 IsBegin = true; 1165 } else if (BeginEnd && BeginEnd->isStr("end")) { 1166 IsBegin = false; 1167 } else { 1168 PP.Diag(Tok.getLocation(), diag::err_pp_arc_cf_code_audited_syntax); 1169 return; 1170 } 1171 1172 // Verify that this is followed by EOD. 1173 PP.LexUnexpandedToken(Tok); 1174 if (Tok.isNot(tok::eod)) 1175 PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; 1176 1177 // The start location of the active audit. 1178 SourceLocation BeginLoc = PP.getPragmaARCCFCodeAuditedLoc(); 1179 1180 // The start location we want after processing this. 1181 SourceLocation NewLoc; 1182 1183 if (IsBegin) { 1184 // Complain about attempts to re-enter an audit. 1185 if (BeginLoc.isValid()) { 1186 PP.Diag(Loc, diag::err_pp_double_begin_of_arc_cf_code_audited); 1187 PP.Diag(BeginLoc, diag::note_pragma_entered_here); 1188 } 1189 NewLoc = Loc; 1190 } else { 1191 // Complain about attempts to leave an audit that doesn't exist. 1192 if (!BeginLoc.isValid()) { 1193 PP.Diag(Loc, diag::err_pp_unmatched_end_of_arc_cf_code_audited); 1194 return; 1195 } 1196 NewLoc = SourceLocation(); 1197 } 1198 1199 PP.setPragmaARCCFCodeAuditedLoc(NewLoc); 1200 } 1201}; 1202 1203} // end anonymous namespace 1204 1205 1206/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 1207/// #pragma GCC poison/system_header/dependency and #pragma once. 1208void Preprocessor::RegisterBuiltinPragmas() { 1209 AddPragmaHandler(new PragmaOnceHandler()); 1210 AddPragmaHandler(new PragmaMarkHandler()); 1211 AddPragmaHandler(new PragmaPushMacroHandler()); 1212 AddPragmaHandler(new PragmaPopMacroHandler()); 1213 AddPragmaHandler(new PragmaMessageHandler()); 1214 1215 // #pragma GCC ... 1216 AddPragmaHandler("GCC", new PragmaPoisonHandler()); 1217 AddPragmaHandler("GCC", new PragmaSystemHeaderHandler()); 1218 AddPragmaHandler("GCC", new PragmaDependencyHandler()); 1219 AddPragmaHandler("GCC", new PragmaDiagnosticHandler("GCC")); 1220 // #pragma clang ... 1221 AddPragmaHandler("clang", new PragmaPoisonHandler()); 1222 AddPragmaHandler("clang", new PragmaSystemHeaderHandler()); 1223 AddPragmaHandler("clang", new PragmaDebugHandler()); 1224 AddPragmaHandler("clang", new PragmaDependencyHandler()); 1225 AddPragmaHandler("clang", new PragmaDiagnosticHandler("clang")); 1226 AddPragmaHandler("clang", new PragmaARCCFCodeAuditedHandler()); 1227 1228 AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler()); 1229 AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler()); 1230 AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler()); 1231 1232 // MS extensions. 1233 if (LangOpts.MicrosoftExt) { 1234 AddPragmaHandler(new PragmaCommentHandler()); 1235 AddPragmaHandler(new PragmaIncludeAliasHandler()); 1236 } 1237} 1238