| //===--- Pragma.cpp - Pragma registration and handling --------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the PragmaHandler/PragmaTable interfaces and implements |
| // pragma related methods of the Preprocessor class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Lex/Pragma.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Lex/HeaderSearch.h" |
| #include "clang/Lex/LexDiagnostic.h" |
| #include "clang/Lex/LiteralSupport.h" |
| #include "clang/Lex/MacroInfo.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/Support/CrashRecoveryContext.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include <algorithm> |
| using namespace clang; |
| |
| #include "llvm/Support/raw_ostream.h" |
| |
| // Out-of-line destructor to provide a home for the class. |
| PragmaHandler::~PragmaHandler() { |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // EmptyPragmaHandler Implementation. |
| //===----------------------------------------------------------------------===// |
| |
| EmptyPragmaHandler::EmptyPragmaHandler() {} |
| |
| void EmptyPragmaHandler::HandlePragma(Preprocessor &PP, |
| PragmaIntroducerKind Introducer, |
| Token &FirstToken) {} |
| |
| //===----------------------------------------------------------------------===// |
| // PragmaNamespace Implementation. |
| //===----------------------------------------------------------------------===// |
| |
| PragmaNamespace::~PragmaNamespace() { |
| for (llvm::StringMap<PragmaHandler*>::iterator |
| I = Handlers.begin(), E = Handlers.end(); I != E; ++I) |
| delete I->second; |
| } |
| |
| /// FindHandler - Check to see if there is already a handler for the |
| /// specified name. If not, return the handler for the null identifier if it |
| /// exists, otherwise return null. If IgnoreNull is true (the default) then |
| /// the null handler isn't returned on failure to match. |
| PragmaHandler *PragmaNamespace::FindHandler(StringRef Name, |
| bool IgnoreNull) const { |
| if (PragmaHandler *Handler = Handlers.lookup(Name)) |
| return Handler; |
| return IgnoreNull ? 0 : Handlers.lookup(StringRef()); |
| } |
| |
| void PragmaNamespace::AddPragma(PragmaHandler *Handler) { |
| assert(!Handlers.lookup(Handler->getName()) && |
| "A handler with this name is already registered in this namespace"); |
| llvm::StringMapEntry<PragmaHandler *> &Entry = |
| Handlers.GetOrCreateValue(Handler->getName()); |
| Entry.setValue(Handler); |
| } |
| |
| void PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { |
| assert(Handlers.lookup(Handler->getName()) && |
| "Handler not registered in this namespace"); |
| Handlers.erase(Handler->getName()); |
| } |
| |
| void PragmaNamespace::HandlePragma(Preprocessor &PP, |
| PragmaIntroducerKind Introducer, |
| Token &Tok) { |
| // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro |
| // expand it, the user can have a STDC #define, that should not affect this. |
| PP.LexUnexpandedToken(Tok); |
| |
| // Get the handler for this token. If there is no handler, ignore the pragma. |
| PragmaHandler *Handler |
| = FindHandler(Tok.getIdentifierInfo() ? Tok.getIdentifierInfo()->getName() |
| : StringRef(), |
| /*IgnoreNull=*/false); |
| if (Handler == 0) { |
| PP.Diag(Tok, diag::warn_pragma_ignored); |
| return; |
| } |
| |
| // Otherwise, pass it down. |
| Handler->HandlePragma(PP, Introducer, Tok); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Preprocessor Pragma Directive Handling. |
| //===----------------------------------------------------------------------===// |
| |
| /// HandlePragmaDirective - The "\#pragma" directive has been parsed. Lex the |
| /// rest of the pragma, passing it to the registered pragma handlers. |
| void Preprocessor::HandlePragmaDirective(SourceLocation IntroducerLoc, |
| PragmaIntroducerKind Introducer) { |
| if (Callbacks) |
| Callbacks->PragmaDirective(IntroducerLoc, Introducer); |
| |
| if (!PragmasEnabled) |
| return; |
| |
| ++NumPragma; |
| |
| // Invoke the first level of pragma handlers which reads the namespace id. |
| Token Tok; |
| PragmaHandlers->HandlePragma(*this, Introducer, Tok); |
| |
| // If the pragma handler didn't read the rest of the line, consume it now. |
| if ((CurTokenLexer && CurTokenLexer->isParsingPreprocessorDirective()) |
| || (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective)) |
| DiscardUntilEndOfDirective(); |
| } |
| |
| namespace { |
| /// \brief Helper class for \see Preprocessor::Handle_Pragma. |
| class LexingFor_PragmaRAII { |
| Preprocessor &PP; |
| bool InMacroArgPreExpansion; |
| bool Failed; |
| Token &OutTok; |
| Token PragmaTok; |
| |
| public: |
| LexingFor_PragmaRAII(Preprocessor &PP, bool InMacroArgPreExpansion, |
| Token &Tok) |
| : PP(PP), InMacroArgPreExpansion(InMacroArgPreExpansion), |
| Failed(false), OutTok(Tok) { |
| if (InMacroArgPreExpansion) { |
| PragmaTok = OutTok; |
| PP.EnableBacktrackAtThisPos(); |
| } |
| } |
| |
| ~LexingFor_PragmaRAII() { |
| if (InMacroArgPreExpansion) { |
| if (Failed) { |
| PP.CommitBacktrackedTokens(); |
| } else { |
| PP.Backtrack(); |
| OutTok = PragmaTok; |
| } |
| } |
| } |
| |
| void failed() { |
| Failed = true; |
| } |
| }; |
| } |
| |
| /// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then |
| /// return the first token after the directive. The _Pragma token has just |
| /// been read into 'Tok'. |
| void Preprocessor::Handle_Pragma(Token &Tok) { |
| |
| // This works differently if we are pre-expanding a macro argument. |
| // In that case we don't actually "activate" the pragma now, we only lex it |
| // until we are sure it is lexically correct and then we backtrack so that |
| // we activate the pragma whenever we encounter the tokens again in the token |
| // stream. This ensures that we will activate it in the correct location |
| // or that we will ignore it if it never enters the token stream, e.g: |
| // |
| // #define EMPTY(x) |
| // #define INACTIVE(x) EMPTY(x) |
| // INACTIVE(_Pragma("clang diagnostic ignored \"-Wconversion\"")) |
| |
| LexingFor_PragmaRAII _PragmaLexing(*this, InMacroArgPreExpansion, Tok); |
| |
| // Remember the pragma token location. |
| SourceLocation PragmaLoc = Tok.getLocation(); |
| |
| // Read the '('. |
| Lex(Tok); |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(PragmaLoc, diag::err__Pragma_malformed); |
| return _PragmaLexing.failed(); |
| } |
| |
| // Read the '"..."'. |
| Lex(Tok); |
| if (!tok::isStringLiteral(Tok.getKind())) { |
| Diag(PragmaLoc, diag::err__Pragma_malformed); |
| // Skip this token, and the ')', if present. |
| if (Tok.isNot(tok::r_paren)) |
| Lex(Tok); |
| if (Tok.is(tok::r_paren)) |
| Lex(Tok); |
| return _PragmaLexing.failed(); |
| } |
| |
| if (Tok.hasUDSuffix()) { |
| Diag(Tok, diag::err_invalid_string_udl); |
| // Skip this token, and the ')', if present. |
| Lex(Tok); |
| if (Tok.is(tok::r_paren)) |
| Lex(Tok); |
| return _PragmaLexing.failed(); |
| } |
| |
| // Remember the string. |
| Token StrTok = Tok; |
| |
| // Read the ')'. |
| Lex(Tok); |
| if (Tok.isNot(tok::r_paren)) { |
| Diag(PragmaLoc, diag::err__Pragma_malformed); |
| return _PragmaLexing.failed(); |
| } |
| |
| if (InMacroArgPreExpansion) |
| return; |
| |
| SourceLocation RParenLoc = Tok.getLocation(); |
| std::string StrVal = getSpelling(StrTok); |
| |
| // The _Pragma is lexically sound. Destringize according to C11 6.10.9.1: |
| // "The string literal is destringized by deleting any encoding prefix, |
| // deleting the leading and trailing double-quotes, replacing each escape |
| // sequence \" by a double-quote, and replacing each escape sequence \\ by a |
| // single backslash." |
| if (StrVal[0] == 'L' || StrVal[0] == 'U' || |
| (StrVal[0] == 'u' && StrVal[1] != '8')) |
| StrVal.erase(StrVal.begin()); |
| else if (StrVal[0] == 'u') |
| StrVal.erase(StrVal.begin(), StrVal.begin() + 2); |
| |
| if (StrVal[0] == 'R') { |
| // FIXME: C++11 does not specify how to handle raw-string-literals here. |
| // We strip off the 'R', the quotes, the d-char-sequences, and the parens. |
| assert(StrVal[1] == '"' && StrVal[StrVal.size() - 1] == '"' && |
| "Invalid raw string token!"); |
| |
| // Measure the length of the d-char-sequence. |
| unsigned NumDChars = 0; |
| while (StrVal[2 + NumDChars] != '(') { |
| assert(NumDChars < (StrVal.size() - 5) / 2 && |
| "Invalid raw string token!"); |
| ++NumDChars; |
| } |
| assert(StrVal[StrVal.size() - 2 - NumDChars] == ')'); |
| |
| // Remove 'R " d-char-sequence' and 'd-char-sequence "'. We'll replace the |
| // parens below. |
| StrVal.erase(0, 2 + NumDChars); |
| StrVal.erase(StrVal.size() - 1 - NumDChars); |
| } else { |
| assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && |
| "Invalid string token!"); |
| |
| // Remove escaped quotes and escapes. |
| unsigned ResultPos = 1; |
| for (unsigned i = 1, e = StrVal.size() - 1; i != e; ++i) { |
| // Skip escapes. \\ -> '\' and \" -> '"'. |
| if (StrVal[i] == '\\' && i + 1 < e && |
| (StrVal[i + 1] == '\\' || StrVal[i + 1] == '"')) |
| ++i; |
| StrVal[ResultPos++] = StrVal[i]; |
| } |
| StrVal.erase(StrVal.begin() + ResultPos, StrVal.end() - 1); |
| } |
| |
| // Remove the front quote, replacing it with a space, so that the pragma |
| // contents appear to have a space before them. |
| StrVal[0] = ' '; |
| |
| // Replace the terminating quote with a \n. |
| StrVal[StrVal.size()-1] = '\n'; |
| |
| // Plop the string (including the newline and trailing null) into a buffer |
| // where we can lex it. |
| Token TmpTok; |
| TmpTok.startToken(); |
| CreateString(StrVal, TmpTok); |
| SourceLocation TokLoc = TmpTok.getLocation(); |
| |
| // Make and enter a lexer object so that we lex and expand the tokens just |
| // like any others. |
| Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, |
| StrVal.size(), *this); |
| |
| EnterSourceFileWithLexer(TL, 0); |
| |
| // With everything set up, lex this as a #pragma directive. |
| HandlePragmaDirective(PragmaLoc, PIK__Pragma); |
| |
| // Finally, return whatever came after the pragma directive. |
| return Lex(Tok); |
| } |
| |
| /// HandleMicrosoft__pragma - Like Handle_Pragma except the pragma text |
| /// is not enclosed within a string literal. |
| void Preprocessor::HandleMicrosoft__pragma(Token &Tok) { |
| // Remember the pragma token location. |
| SourceLocation PragmaLoc = Tok.getLocation(); |
| |
| // Read the '('. |
| Lex(Tok); |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(PragmaLoc, diag::err__Pragma_malformed); |
| return; |
| } |
| |
| // Get the tokens enclosed within the __pragma(), as well as the final ')'. |
| SmallVector<Token, 32> PragmaToks; |
| int NumParens = 0; |
| Lex(Tok); |
| while (Tok.isNot(tok::eof)) { |
| PragmaToks.push_back(Tok); |
| if (Tok.is(tok::l_paren)) |
| NumParens++; |
| else if (Tok.is(tok::r_paren) && NumParens-- == 0) |
| break; |
| Lex(Tok); |
| } |
| |
| if (Tok.is(tok::eof)) { |
| Diag(PragmaLoc, diag::err_unterminated___pragma); |
| return; |
| } |
| |
| PragmaToks.front().setFlag(Token::LeadingSpace); |
| |
| // Replace the ')' with an EOD to mark the end of the pragma. |
| PragmaToks.back().setKind(tok::eod); |
| |
| Token *TokArray = new Token[PragmaToks.size()]; |
| std::copy(PragmaToks.begin(), PragmaToks.end(), TokArray); |
| |
| // Push the tokens onto the stack. |
| EnterTokenStream(TokArray, PragmaToks.size(), true, true); |
| |
| // With everything set up, lex this as a #pragma directive. |
| HandlePragmaDirective(PragmaLoc, PIK___pragma); |
| |
| // Finally, return whatever came after the pragma directive. |
| return Lex(Tok); |
| } |
| |
| /// HandlePragmaOnce - Handle \#pragma once. OnceTok is the 'once'. |
| /// |
| void Preprocessor::HandlePragmaOnce(Token &OnceTok) { |
| if (isInPrimaryFile()) { |
| Diag(OnceTok, diag::pp_pragma_once_in_main_file); |
| return; |
| } |
| |
| // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. |
| // Mark the file as a once-only file now. |
| HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); |
| } |
| |
| void Preprocessor::HandlePragmaMark() { |
| assert(CurPPLexer && "No current lexer?"); |
| if (CurLexer) |
| CurLexer->ReadToEndOfLine(); |
| else |
| CurPTHLexer->DiscardToEndOfLine(); |
| } |
| |
| |
| /// HandlePragmaPoison - Handle \#pragma GCC poison. PoisonTok is the 'poison'. |
| /// |
| void Preprocessor::HandlePragmaPoison(Token &PoisonTok) { |
| Token Tok; |
| |
| while (1) { |
| // Read the next token to poison. While doing this, pretend that we are |
| // skipping while reading the identifier to poison. |
| // This avoids errors on code like: |
| // #pragma GCC poison X |
| // #pragma GCC poison X |
| if (CurPPLexer) CurPPLexer->LexingRawMode = true; |
| LexUnexpandedToken(Tok); |
| if (CurPPLexer) CurPPLexer->LexingRawMode = false; |
| |
| // If we reached the end of line, we're done. |
| if (Tok.is(tok::eod)) return; |
| |
| // Can only poison identifiers. |
| if (Tok.isNot(tok::raw_identifier)) { |
| Diag(Tok, diag::err_pp_invalid_poison); |
| return; |
| } |
| |
| // Look up the identifier info for the token. We disabled identifier lookup |
| // by saying we're skipping contents, so we need to do this manually. |
| IdentifierInfo *II = LookUpIdentifierInfo(Tok); |
| |
| // Already poisoned. |
| if (II->isPoisoned()) continue; |
| |
| // If this is a macro identifier, emit a warning. |
| if (II->hasMacroDefinition()) |
| Diag(Tok, diag::pp_poisoning_existing_macro); |
| |
| // Finally, poison it! |
| II->setIsPoisoned(); |
| if (II->isFromAST()) |
| II->setChangedSinceDeserialization(); |
| } |
| } |
| |
| /// HandlePragmaSystemHeader - Implement \#pragma GCC system_header. We know |
| /// that the whole directive has been parsed. |
| void Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { |
| if (isInPrimaryFile()) { |
| Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); |
| return; |
| } |
| |
| // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. |
| PreprocessorLexer *TheLexer = getCurrentFileLexer(); |
| |
| // Mark the file as a system header. |
| HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); |
| |
| |
| PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation()); |
| if (PLoc.isInvalid()) |
| return; |
| |
| unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename()); |
| |
| // Notify the client, if desired, that we are in a new source file. |
| if (Callbacks) |
| Callbacks->FileChanged(SysHeaderTok.getLocation(), |
| PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); |
| |
| // Emit a line marker. This will change any source locations from this point |
| // forward to realize they are in a system header. |
| // Create a line note with this information. |
| SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine()+1, |
| FilenameID, /*IsEntry=*/false, /*IsExit=*/false, |
| /*IsSystem=*/true, /*IsExternC=*/false); |
| } |
| |
| /// HandlePragmaDependency - Handle \#pragma GCC dependency "foo" blah. |
| /// |
| void Preprocessor::HandlePragmaDependency(Token &DependencyTok) { |
| Token FilenameTok; |
| CurPPLexer->LexIncludeFilename(FilenameTok); |
| |
| // If the token kind is EOD, the error has already been diagnosed. |
| if (FilenameTok.is(tok::eod)) |
| return; |
| |
| // Reserve a buffer to get the spelling. |
| SmallString<128> FilenameBuffer; |
| bool Invalid = false; |
| StringRef Filename = getSpelling(FilenameTok, FilenameBuffer, &Invalid); |
| if (Invalid) |
| return; |
| |
| bool isAngled = |
| GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); |
| // If GetIncludeFilenameSpelling set the start ptr to null, there was an |
| // error. |
| if (Filename.empty()) |
| return; |
| |
| // Search include directories for this file. |
| const DirectoryLookup *CurDir; |
| const FileEntry *File = LookupFile(FilenameTok.getLocation(), Filename, |
| isAngled, 0, CurDir, NULL, NULL, NULL); |
| if (File == 0) { |
| if (!SuppressIncludeNotFoundError) |
| Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; |
| return; |
| } |
| |
| const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); |
| |
| // If this file is older than the file it depends on, emit a diagnostic. |
| if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { |
| // Lex tokens at the end of the message and include them in the message. |
| std::string Message; |
| Lex(DependencyTok); |
| while (DependencyTok.isNot(tok::eod)) { |
| Message += getSpelling(DependencyTok) + " "; |
| Lex(DependencyTok); |
| } |
| |
| // Remove the trailing ' ' if present. |
| if (!Message.empty()) |
| Message.erase(Message.end()-1); |
| Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; |
| } |
| } |
| |
| /// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro. |
| /// Return the IdentifierInfo* associated with the macro to push or pop. |
| IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) { |
| // Remember the pragma token location. |
| Token PragmaTok = Tok; |
| |
| // Read the '('. |
| Lex(Tok); |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) |
| << getSpelling(PragmaTok); |
| return 0; |
| } |
| |
| // Read the macro name string. |
| Lex(Tok); |
| if (Tok.isNot(tok::string_literal)) { |
| Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) |
| << getSpelling(PragmaTok); |
| return 0; |
| } |
| |
| if (Tok.hasUDSuffix()) { |
| Diag(Tok, diag::err_invalid_string_udl); |
| return 0; |
| } |
| |
| // Remember the macro string. |
| std::string StrVal = getSpelling(Tok); |
| |
| // Read the ')'. |
| Lex(Tok); |
| if (Tok.isNot(tok::r_paren)) { |
| Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) |
| << getSpelling(PragmaTok); |
| return 0; |
| } |
| |
| assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && |
| "Invalid string token!"); |
| |
| // Create a Token from the string. |
| Token MacroTok; |
| MacroTok.startToken(); |
| MacroTok.setKind(tok::raw_identifier); |
| CreateString(StringRef(&StrVal[1], StrVal.size() - 2), MacroTok); |
| |
| // Get the IdentifierInfo of MacroToPushTok. |
| return LookUpIdentifierInfo(MacroTok); |
| } |
| |
| /// \brief Handle \#pragma push_macro. |
| /// |
| /// The syntax is: |
| /// \code |
| /// #pragma push_macro("macro") |
| /// \endcode |
| void Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) { |
| // Parse the pragma directive and get the macro IdentifierInfo*. |
| IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok); |
| if (!IdentInfo) return; |
| |
| // Get the MacroInfo associated with IdentInfo. |
| MacroInfo *MI = getMacroInfo(IdentInfo); |
| |
| if (MI) { |
| // Allow the original MacroInfo to be redefined later. |
| MI->setIsAllowRedefinitionsWithoutWarning(true); |
| } |
| |
| // Push the cloned MacroInfo so we can retrieve it later. |
| PragmaPushMacroInfo[IdentInfo].push_back(MI); |
| } |
| |
| /// \brief Handle \#pragma pop_macro. |
| /// |
| /// The syntax is: |
| /// \code |
| /// #pragma pop_macro("macro") |
| /// \endcode |
| void Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) { |
| SourceLocation MessageLoc = PopMacroTok.getLocation(); |
| |
| // Parse the pragma directive and get the macro IdentifierInfo*. |
| IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok); |
| if (!IdentInfo) return; |
| |
| // Find the vector<MacroInfo*> associated with the macro. |
| llvm::DenseMap<IdentifierInfo*, std::vector<MacroInfo*> >::iterator iter = |
| PragmaPushMacroInfo.find(IdentInfo); |
| if (iter != PragmaPushMacroInfo.end()) { |
| // Forget the MacroInfo currently associated with IdentInfo. |
| if (MacroDirective *CurrentMD = getMacroDirective(IdentInfo)) { |
| MacroInfo *MI = CurrentMD->getMacroInfo(); |
| if (MI->isWarnIfUnused()) |
| WarnUnusedMacroLocs.erase(MI->getDefinitionLoc()); |
| appendMacroDirective(IdentInfo, AllocateUndefMacroDirective(MessageLoc)); |
| } |
| |
| // Get the MacroInfo we want to reinstall. |
| MacroInfo *MacroToReInstall = iter->second.back(); |
| |
| if (MacroToReInstall) { |
| // Reinstall the previously pushed macro. |
| appendDefMacroDirective(IdentInfo, MacroToReInstall, MessageLoc, |
| /*isImported=*/false); |
| } |
| |
| // Pop PragmaPushMacroInfo stack. |
| iter->second.pop_back(); |
| if (iter->second.size() == 0) |
| PragmaPushMacroInfo.erase(iter); |
| } else { |
| Diag(MessageLoc, diag::warn_pragma_pop_macro_no_push) |
| << IdentInfo->getName(); |
| } |
| } |
| |
| void Preprocessor::HandlePragmaIncludeAlias(Token &Tok) { |
| // We will either get a quoted filename or a bracketed filename, and we |
| // have to track which we got. The first filename is the source name, |
| // and the second name is the mapped filename. If the first is quoted, |
| // the second must be as well (cannot mix and match quotes and brackets). |
| |
| // Get the open paren |
| Lex(Tok); |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(Tok, diag::warn_pragma_include_alias_expected) << "("; |
| return; |
| } |
| |
| // We expect either a quoted string literal, or a bracketed name |
| Token SourceFilenameTok; |
| CurPPLexer->LexIncludeFilename(SourceFilenameTok); |
| if (SourceFilenameTok.is(tok::eod)) { |
| // The diagnostic has already been handled |
| return; |
| } |
| |
| StringRef SourceFileName; |
| SmallString<128> FileNameBuffer; |
| if (SourceFilenameTok.is(tok::string_literal) || |
| SourceFilenameTok.is(tok::angle_string_literal)) { |
| SourceFileName = getSpelling(SourceFilenameTok, FileNameBuffer); |
| } else if (SourceFilenameTok.is(tok::less)) { |
| // This could be a path instead of just a name |
| FileNameBuffer.push_back('<'); |
| SourceLocation End; |
| if (ConcatenateIncludeName(FileNameBuffer, End)) |
| return; // Diagnostic already emitted |
| SourceFileName = FileNameBuffer.str(); |
| } else { |
| Diag(Tok, diag::warn_pragma_include_alias_expected_filename); |
| return; |
| } |
| FileNameBuffer.clear(); |
| |
| // Now we expect a comma, followed by another include name |
| Lex(Tok); |
| if (Tok.isNot(tok::comma)) { |
| Diag(Tok, diag::warn_pragma_include_alias_expected) << ","; |
| return; |
| } |
| |
| Token ReplaceFilenameTok; |
| CurPPLexer->LexIncludeFilename(ReplaceFilenameTok); |
| if (ReplaceFilenameTok.is(tok::eod)) { |
| // The diagnostic has already been handled |
| return; |
| } |
| |
| StringRef ReplaceFileName; |
| if (ReplaceFilenameTok.is(tok::string_literal) || |
| ReplaceFilenameTok.is(tok::angle_string_literal)) { |
| ReplaceFileName = getSpelling(ReplaceFilenameTok, FileNameBuffer); |
| } else if (ReplaceFilenameTok.is(tok::less)) { |
| // This could be a path instead of just a name |
| FileNameBuffer.push_back('<'); |
| SourceLocation End; |
| if (ConcatenateIncludeName(FileNameBuffer, End)) |
| return; // Diagnostic already emitted |
| ReplaceFileName = FileNameBuffer.str(); |
| } else { |
| Diag(Tok, diag::warn_pragma_include_alias_expected_filename); |
| return; |
| } |
| |
| // Finally, we expect the closing paren |
| Lex(Tok); |
| if (Tok.isNot(tok::r_paren)) { |
| Diag(Tok, diag::warn_pragma_include_alias_expected) << ")"; |
| return; |
| } |
| |
| // Now that we have the source and target filenames, we need to make sure |
| // they're both of the same type (angled vs non-angled) |
| StringRef OriginalSource = SourceFileName; |
| |
| bool SourceIsAngled = |
| GetIncludeFilenameSpelling(SourceFilenameTok.getLocation(), |
| SourceFileName); |
| bool ReplaceIsAngled = |
| GetIncludeFilenameSpelling(ReplaceFilenameTok.getLocation(), |
| ReplaceFileName); |
| if (!SourceFileName.empty() && !ReplaceFileName.empty() && |
| (SourceIsAngled != ReplaceIsAngled)) { |
| unsigned int DiagID; |
| if (SourceIsAngled) |
| DiagID = diag::warn_pragma_include_alias_mismatch_angle; |
| else |
| DiagID = diag::warn_pragma_include_alias_mismatch_quote; |
| |
| Diag(SourceFilenameTok.getLocation(), DiagID) |
| << SourceFileName |
| << ReplaceFileName; |
| |
| return; |
| } |
| |
| // Now we can let the include handler know about this mapping |
| getHeaderSearchInfo().AddIncludeAlias(OriginalSource, ReplaceFileName); |
| } |
| |
| /// AddPragmaHandler - Add the specified pragma handler to the preprocessor. |
| /// If 'Namespace' is non-null, then it is a token required to exist on the |
| /// pragma line before the pragma string starts, e.g. "STDC" or "GCC". |
| void Preprocessor::AddPragmaHandler(StringRef Namespace, |
| PragmaHandler *Handler) { |
| PragmaNamespace *InsertNS = PragmaHandlers; |
| |
| // If this is specified to be in a namespace, step down into it. |
| if (!Namespace.empty()) { |
| // If there is already a pragma handler with the name of this namespace, |
| // we either have an error (directive with the same name as a namespace) or |
| // we already have the namespace to insert into. |
| if (PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace)) { |
| InsertNS = Existing->getIfNamespace(); |
| assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" |
| " handler with the same name!"); |
| } else { |
| // Otherwise, this namespace doesn't exist yet, create and insert the |
| // handler for it. |
| InsertNS = new PragmaNamespace(Namespace); |
| PragmaHandlers->AddPragma(InsertNS); |
| } |
| } |
| |
| // Check to make sure we don't already have a pragma for this identifier. |
| assert(!InsertNS->FindHandler(Handler->getName()) && |
| "Pragma handler already exists for this identifier!"); |
| InsertNS->AddPragma(Handler); |
| } |
| |
| /// RemovePragmaHandler - Remove the specific pragma handler from the |
| /// preprocessor. If \arg Namespace is non-null, then it should be the |
| /// namespace that \arg Handler was added to. It is an error to remove |
| /// a handler that has not been registered. |
| void Preprocessor::RemovePragmaHandler(StringRef Namespace, |
| PragmaHandler *Handler) { |
| PragmaNamespace *NS = PragmaHandlers; |
| |
| // If this is specified to be in a namespace, step down into it. |
| if (!Namespace.empty()) { |
| PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace); |
| assert(Existing && "Namespace containing handler does not exist!"); |
| |
| NS = Existing->getIfNamespace(); |
| assert(NS && "Invalid namespace, registered as a regular pragma handler!"); |
| } |
| |
| NS->RemovePragmaHandler(Handler); |
| |
| // If this is a non-default namespace and it is now empty, remove |
| // it. |
| if (NS != PragmaHandlers && NS->IsEmpty()) { |
| PragmaHandlers->RemovePragmaHandler(NS); |
| delete NS; |
| } |
| } |
| |
| bool Preprocessor::LexOnOffSwitch(tok::OnOffSwitch &Result) { |
| Token Tok; |
| LexUnexpandedToken(Tok); |
| |
| if (Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::ext_on_off_switch_syntax); |
| return true; |
| } |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| if (II->isStr("ON")) |
| Result = tok::OOS_ON; |
| else if (II->isStr("OFF")) |
| Result = tok::OOS_OFF; |
| else if (II->isStr("DEFAULT")) |
| Result = tok::OOS_DEFAULT; |
| else { |
| Diag(Tok, diag::ext_on_off_switch_syntax); |
| return true; |
| } |
| |
| // Verify that this is followed by EOD. |
| LexUnexpandedToken(Tok); |
| if (Tok.isNot(tok::eod)) |
| Diag(Tok, diag::ext_pragma_syntax_eod); |
| return false; |
| } |
| |
| namespace { |
| /// PragmaOnceHandler - "\#pragma once" marks the file as atomically included. |
| struct PragmaOnceHandler : public PragmaHandler { |
| PragmaOnceHandler() : PragmaHandler("once") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &OnceTok) { |
| PP.CheckEndOfDirective("pragma once"); |
| PP.HandlePragmaOnce(OnceTok); |
| } |
| }; |
| |
| /// PragmaMarkHandler - "\#pragma mark ..." is ignored by the compiler, and the |
| /// rest of the line is not lexed. |
| struct PragmaMarkHandler : public PragmaHandler { |
| PragmaMarkHandler() : PragmaHandler("mark") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &MarkTok) { |
| PP.HandlePragmaMark(); |
| } |
| }; |
| |
| /// PragmaPoisonHandler - "\#pragma poison x" marks x as not usable. |
| struct PragmaPoisonHandler : public PragmaHandler { |
| PragmaPoisonHandler() : PragmaHandler("poison") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &PoisonTok) { |
| PP.HandlePragmaPoison(PoisonTok); |
| } |
| }; |
| |
| /// PragmaSystemHeaderHandler - "\#pragma system_header" marks the current file |
| /// as a system header, which silences warnings in it. |
| struct PragmaSystemHeaderHandler : public PragmaHandler { |
| PragmaSystemHeaderHandler() : PragmaHandler("system_header") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &SHToken) { |
| PP.HandlePragmaSystemHeader(SHToken); |
| PP.CheckEndOfDirective("pragma"); |
| } |
| }; |
| struct PragmaDependencyHandler : public PragmaHandler { |
| PragmaDependencyHandler() : PragmaHandler("dependency") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &DepToken) { |
| PP.HandlePragmaDependency(DepToken); |
| } |
| }; |
| |
| struct PragmaDebugHandler : public PragmaHandler { |
| PragmaDebugHandler() : PragmaHandler("__debug") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &DepToken) { |
| Token Tok; |
| PP.LexUnexpandedToken(Tok); |
| if (Tok.isNot(tok::identifier)) { |
| PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); |
| return; |
| } |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| |
| if (II->isStr("assert")) { |
| llvm_unreachable("This is an assertion!"); |
| } else if (II->isStr("crash")) { |
| LLVM_BUILTIN_TRAP; |
| } else if (II->isStr("parser_crash")) { |
| Token Crasher; |
| Crasher.setKind(tok::annot_pragma_parser_crash); |
| PP.EnterToken(Crasher); |
| } else if (II->isStr("llvm_fatal_error")) { |
| llvm::report_fatal_error("#pragma clang __debug llvm_fatal_error"); |
| } else if (II->isStr("llvm_unreachable")) { |
| llvm_unreachable("#pragma clang __debug llvm_unreachable"); |
| } else if (II->isStr("overflow_stack")) { |
| DebugOverflowStack(); |
| } else if (II->isStr("handle_crash")) { |
| llvm::CrashRecoveryContext *CRC =llvm::CrashRecoveryContext::GetCurrent(); |
| if (CRC) |
| CRC->HandleCrash(); |
| } else if (II->isStr("captured")) { |
| HandleCaptured(PP); |
| } else { |
| PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command) |
| << II->getName(); |
| } |
| |
| PPCallbacks *Callbacks = PP.getPPCallbacks(); |
| if (Callbacks) |
| Callbacks->PragmaDebug(Tok.getLocation(), II->getName()); |
| } |
| |
| void HandleCaptured(Preprocessor &PP) { |
| // Skip if emitting preprocessed output. |
| if (PP.isPreprocessedOutput()) |
| return; |
| |
| Token Tok; |
| PP.LexUnexpandedToken(Tok); |
| |
| if (Tok.isNot(tok::eod)) { |
| PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) |
| << "pragma clang __debug captured"; |
| return; |
| } |
| |
| SourceLocation NameLoc = Tok.getLocation(); |
| Token *Toks = PP.getPreprocessorAllocator().Allocate<Token>(1); |
| Toks->startToken(); |
| Toks->setKind(tok::annot_pragma_captured); |
| Toks->setLocation(NameLoc); |
| |
| PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true, |
| /*OwnsTokens=*/false); |
| } |
| |
| // Disable MSVC warning about runtime stack overflow. |
| #ifdef _MSC_VER |
| #pragma warning(disable : 4717) |
| #endif |
| void DebugOverflowStack() { |
| DebugOverflowStack(); |
| } |
| #ifdef _MSC_VER |
| #pragma warning(default : 4717) |
| #endif |
| |
| }; |
| |
| /// PragmaDiagnosticHandler - e.g. '\#pragma GCC diagnostic ignored "-Wformat"' |
| struct PragmaDiagnosticHandler : public PragmaHandler { |
| private: |
| const char *Namespace; |
| public: |
| explicit PragmaDiagnosticHandler(const char *NS) : |
| PragmaHandler("diagnostic"), Namespace(NS) {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &DiagToken) { |
| SourceLocation DiagLoc = DiagToken.getLocation(); |
| Token Tok; |
| PP.LexUnexpandedToken(Tok); |
| if (Tok.isNot(tok::identifier)) { |
| PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); |
| return; |
| } |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| PPCallbacks *Callbacks = PP.getPPCallbacks(); |
| |
| diag::Mapping Map; |
| if (II->isStr("warning")) |
| Map = diag::MAP_WARNING; |
| else if (II->isStr("error")) |
| Map = diag::MAP_ERROR; |
| else if (II->isStr("ignored")) |
| Map = diag::MAP_IGNORE; |
| else if (II->isStr("fatal")) |
| Map = diag::MAP_FATAL; |
| else if (II->isStr("pop")) { |
| if (!PP.getDiagnostics().popMappings(DiagLoc)) |
| PP.Diag(Tok, diag::warn_pragma_diagnostic_cannot_pop); |
| else if (Callbacks) |
| Callbacks->PragmaDiagnosticPop(DiagLoc, Namespace); |
| return; |
| } else if (II->isStr("push")) { |
| PP.getDiagnostics().pushMappings(DiagLoc); |
| if (Callbacks) |
| Callbacks->PragmaDiagnosticPush(DiagLoc, Namespace); |
| return; |
| } else { |
| PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); |
| return; |
| } |
| |
| PP.LexUnexpandedToken(Tok); |
| SourceLocation StringLoc = Tok.getLocation(); |
| |
| std::string WarningName; |
| if (!PP.FinishLexStringLiteral(Tok, WarningName, "pragma diagnostic", |
| /*MacroExpansion=*/false)) |
| return; |
| |
| if (Tok.isNot(tok::eod)) { |
| PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); |
| return; |
| } |
| |
| if (WarningName.size() < 3 || WarningName[0] != '-' || |
| WarningName[1] != 'W') { |
| PP.Diag(StringLoc, diag::warn_pragma_diagnostic_invalid_option); |
| return; |
| } |
| |
| if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.substr(2), |
| Map, DiagLoc)) |
| PP.Diag(StringLoc, diag::warn_pragma_diagnostic_unknown_warning) |
| << WarningName; |
| else if (Callbacks) |
| Callbacks->PragmaDiagnostic(DiagLoc, Namespace, Map, WarningName); |
| } |
| }; |
| |
| // Returns -1 on failure. |
| static int LexSimpleInt(Preprocessor &PP, Token &Tok) { |
| assert(Tok.is(tok::numeric_constant)); |
| SmallString<8> IntegerBuffer; |
| bool NumberInvalid = false; |
| StringRef Spelling = PP.getSpelling(Tok, IntegerBuffer, &NumberInvalid); |
| if (NumberInvalid) |
| return -1; |
| NumericLiteralParser Literal(Spelling, Tok.getLocation(), PP); |
| if (Literal.hadError || !Literal.isIntegerLiteral() || Literal.hasUDSuffix()) |
| return -1; |
| llvm::APInt APVal(32, 0); |
| if (Literal.GetIntegerValue(APVal)) |
| return -1; |
| PP.Lex(Tok); |
| return int(APVal.getLimitedValue(INT_MAX)); |
| } |
| |
| /// "\#pragma warning(...)". MSVC's diagnostics do not map cleanly to clang's |
| /// diagnostics, so we don't really implement this pragma. We parse it and |
| /// ignore it to avoid -Wunknown-pragma warnings. |
| struct PragmaWarningHandler : public PragmaHandler { |
| PragmaWarningHandler() : PragmaHandler("warning") {} |
| |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &Tok) { |
| // Parse things like: |
| // warning(push, 1) |
| // warning(pop) |
| // warning(disable : 1 2 3 ; error 4 5 6 ; suppress 7 8 9) |
| SourceLocation DiagLoc = Tok.getLocation(); |
| PPCallbacks *Callbacks = PP.getPPCallbacks(); |
| |
| PP.Lex(Tok); |
| if (Tok.isNot(tok::l_paren)) { |
| PP.Diag(Tok, diag::warn_pragma_warning_expected) << "("; |
| return; |
| } |
| |
| PP.Lex(Tok); |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| if (!II) { |
| PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid); |
| return; |
| } |
| |
| if (II->isStr("push")) { |
| // #pragma warning( push[ ,n ] ) |
| int Level = -1; |
| PP.Lex(Tok); |
| if (Tok.is(tok::comma)) { |
| PP.Lex(Tok); |
| if (Tok.is(tok::numeric_constant)) |
| Level = LexSimpleInt(PP, Tok); |
| if (Level < 0 || Level > 4) { |
| PP.Diag(Tok, diag::warn_pragma_warning_push_level); |
| return; |
| } |
| } |
| if (Callbacks) |
| Callbacks->PragmaWarningPush(DiagLoc, Level); |
| } else if (II->isStr("pop")) { |
| // #pragma warning( pop ) |
| PP.Lex(Tok); |
| if (Callbacks) |
| Callbacks->PragmaWarningPop(DiagLoc); |
| } else { |
| // #pragma warning( warning-specifier : warning-number-list |
| // [; warning-specifier : warning-number-list...] ) |
| while (true) { |
| II = Tok.getIdentifierInfo(); |
| if (!II) { |
| PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid); |
| return; |
| } |
| |
| // Figure out which warning specifier this is. |
| StringRef Specifier = II->getName(); |
| bool SpecifierValid = |
| llvm::StringSwitch<bool>(Specifier) |
| .Cases("1", "2", "3", "4", true) |
| .Cases("default", "disable", "error", "once", "suppress", true) |
| .Default(false); |
| if (!SpecifierValid) { |
| PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid); |
| return; |
| } |
| PP.Lex(Tok); |
| if (Tok.isNot(tok::colon)) { |
| PP.Diag(Tok, diag::warn_pragma_warning_expected) << ":"; |
| return; |
| } |
| |
| // Collect the warning ids. |
| SmallVector<int, 4> Ids; |
| PP.Lex(Tok); |
| while (Tok.is(tok::numeric_constant)) { |
| int Id = LexSimpleInt(PP, Tok); |
| if (Id <= 0) { |
| PP.Diag(Tok, diag::warn_pragma_warning_expected_number); |
| return; |
| } |
| Ids.push_back(Id); |
| } |
| if (Callbacks) |
| Callbacks->PragmaWarning(DiagLoc, Specifier, Ids); |
| |
| // Parse the next specifier if there is a semicolon. |
| if (Tok.isNot(tok::semi)) |
| break; |
| PP.Lex(Tok); |
| } |
| } |
| |
| if (Tok.isNot(tok::r_paren)) { |
| PP.Diag(Tok, diag::warn_pragma_warning_expected) << ")"; |
| return; |
| } |
| |
| PP.Lex(Tok); |
| if (Tok.isNot(tok::eod)) |
| PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma warning"; |
| } |
| }; |
| |
| /// PragmaIncludeAliasHandler - "\#pragma include_alias("...")". |
| struct PragmaIncludeAliasHandler : public PragmaHandler { |
| PragmaIncludeAliasHandler() : PragmaHandler("include_alias") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &IncludeAliasTok) { |
| PP.HandlePragmaIncludeAlias(IncludeAliasTok); |
| } |
| }; |
| |
| /// PragmaMessageHandler - Handle the microsoft and gcc \#pragma message |
| /// extension. The syntax is: |
| /// \code |
| /// #pragma message(string) |
| /// \endcode |
| /// OR, in GCC mode: |
| /// \code |
| /// #pragma message string |
| /// \endcode |
| /// string is a string, which is fully macro expanded, and permits string |
| /// concatenation, embedded escape characters, etc... See MSDN for more details. |
| /// Also handles \#pragma GCC warning and \#pragma GCC error which take the same |
| /// form as \#pragma message. |
| struct PragmaMessageHandler : public PragmaHandler { |
| private: |
| const PPCallbacks::PragmaMessageKind Kind; |
| const StringRef Namespace; |
| |
| static const char* PragmaKind(PPCallbacks::PragmaMessageKind Kind, |
| bool PragmaNameOnly = false) { |
| switch (Kind) { |
| case PPCallbacks::PMK_Message: |
| return PragmaNameOnly ? "message" : "pragma message"; |
| case PPCallbacks::PMK_Warning: |
| return PragmaNameOnly ? "warning" : "pragma warning"; |
| case PPCallbacks::PMK_Error: |
| return PragmaNameOnly ? "error" : "pragma error"; |
| } |
| llvm_unreachable("Unknown PragmaMessageKind!"); |
| } |
| |
| public: |
| PragmaMessageHandler(PPCallbacks::PragmaMessageKind Kind, |
| StringRef Namespace = StringRef()) |
| : PragmaHandler(PragmaKind(Kind, true)), Kind(Kind), Namespace(Namespace) {} |
| |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &Tok) { |
| SourceLocation MessageLoc = Tok.getLocation(); |
| PP.Lex(Tok); |
| bool ExpectClosingParen = false; |
| switch (Tok.getKind()) { |
| case tok::l_paren: |
| // We have a MSVC style pragma message. |
| ExpectClosingParen = true; |
| // Read the string. |
| PP.Lex(Tok); |
| break; |
| case tok::string_literal: |
| // We have a GCC style pragma message, and we just read the string. |
| break; |
| default: |
| PP.Diag(MessageLoc, diag::err_pragma_message_malformed) << Kind; |
| return; |
| } |
| |
| std::string MessageString; |
| if (!PP.FinishLexStringLiteral(Tok, MessageString, PragmaKind(Kind), |
| /*MacroExpansion=*/true)) |
| return; |
| |
| if (ExpectClosingParen) { |
| if (Tok.isNot(tok::r_paren)) { |
| PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind; |
| return; |
| } |
| PP.Lex(Tok); // eat the r_paren. |
| } |
| |
| if (Tok.isNot(tok::eod)) { |
| PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind; |
| return; |
| } |
| |
| // Output the message. |
| PP.Diag(MessageLoc, (Kind == PPCallbacks::PMK_Error) |
| ? diag::err_pragma_message |
| : diag::warn_pragma_message) << MessageString; |
| |
| // If the pragma is lexically sound, notify any interested PPCallbacks. |
| if (PPCallbacks *Callbacks = PP.getPPCallbacks()) |
| Callbacks->PragmaMessage(MessageLoc, Namespace, Kind, MessageString); |
| } |
| }; |
| |
| /// PragmaPushMacroHandler - "\#pragma push_macro" saves the value of the |
| /// macro on the top of the stack. |
| struct PragmaPushMacroHandler : public PragmaHandler { |
| PragmaPushMacroHandler() : PragmaHandler("push_macro") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &PushMacroTok) { |
| PP.HandlePragmaPushMacro(PushMacroTok); |
| } |
| }; |
| |
| |
| /// PragmaPopMacroHandler - "\#pragma pop_macro" sets the value of the |
| /// macro to the value on the top of the stack. |
| struct PragmaPopMacroHandler : public PragmaHandler { |
| PragmaPopMacroHandler() : PragmaHandler("pop_macro") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &PopMacroTok) { |
| PP.HandlePragmaPopMacro(PopMacroTok); |
| } |
| }; |
| |
| // Pragma STDC implementations. |
| |
| /// PragmaSTDC_FENV_ACCESSHandler - "\#pragma STDC FENV_ACCESS ...". |
| struct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler { |
| PragmaSTDC_FENV_ACCESSHandler() : PragmaHandler("FENV_ACCESS") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &Tok) { |
| tok::OnOffSwitch OOS; |
| if (PP.LexOnOffSwitch(OOS)) |
| return; |
| if (OOS == tok::OOS_ON) |
| PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported); |
| } |
| }; |
| |
| /// PragmaSTDC_CX_LIMITED_RANGEHandler - "\#pragma STDC CX_LIMITED_RANGE ...". |
| struct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler { |
| PragmaSTDC_CX_LIMITED_RANGEHandler() |
| : PragmaHandler("CX_LIMITED_RANGE") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &Tok) { |
| tok::OnOffSwitch OOS; |
| PP.LexOnOffSwitch(OOS); |
| } |
| }; |
| |
| /// PragmaSTDC_UnknownHandler - "\#pragma STDC ...". |
| struct PragmaSTDC_UnknownHandler : public PragmaHandler { |
| PragmaSTDC_UnknownHandler() {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &UnknownTok) { |
| // C99 6.10.6p2, unknown forms are not allowed. |
| PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored); |
| } |
| }; |
| |
| /// PragmaARCCFCodeAuditedHandler - |
| /// \#pragma clang arc_cf_code_audited begin/end |
| struct PragmaARCCFCodeAuditedHandler : public PragmaHandler { |
| PragmaARCCFCodeAuditedHandler() : PragmaHandler("arc_cf_code_audited") {} |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &NameTok) { |
| SourceLocation Loc = NameTok.getLocation(); |
| bool IsBegin; |
| |
| Token Tok; |
| |
| // Lex the 'begin' or 'end'. |
| PP.LexUnexpandedToken(Tok); |
| const IdentifierInfo *BeginEnd = Tok.getIdentifierInfo(); |
| if (BeginEnd && BeginEnd->isStr("begin")) { |
| IsBegin = true; |
| } else if (BeginEnd && BeginEnd->isStr("end")) { |
| IsBegin = false; |
| } else { |
| PP.Diag(Tok.getLocation(), diag::err_pp_arc_cf_code_audited_syntax); |
| return; |
| } |
| |
| // Verify that this is followed by EOD. |
| PP.LexUnexpandedToken(Tok); |
| if (Tok.isNot(tok::eod)) |
| PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; |
| |
| // The start location of the active audit. |
| SourceLocation BeginLoc = PP.getPragmaARCCFCodeAuditedLoc(); |
| |
| // The start location we want after processing this. |
| SourceLocation NewLoc; |
| |
| if (IsBegin) { |
| // Complain about attempts to re-enter an audit. |
| if (BeginLoc.isValid()) { |
| PP.Diag(Loc, diag::err_pp_double_begin_of_arc_cf_code_audited); |
| PP.Diag(BeginLoc, diag::note_pragma_entered_here); |
| } |
| NewLoc = Loc; |
| } else { |
| // Complain about attempts to leave an audit that doesn't exist. |
| if (!BeginLoc.isValid()) { |
| PP.Diag(Loc, diag::err_pp_unmatched_end_of_arc_cf_code_audited); |
| return; |
| } |
| NewLoc = SourceLocation(); |
| } |
| |
| PP.setPragmaARCCFCodeAuditedLoc(NewLoc); |
| } |
| }; |
| |
| /// \brief Handle "\#pragma region [...]" |
| /// |
| /// The syntax is |
| /// \code |
| /// #pragma region [optional name] |
| /// #pragma endregion [optional comment] |
| /// \endcode |
| /// |
| /// \note This is |
| /// <a href="http://msdn.microsoft.com/en-us/library/b6xkz944(v=vs.80).aspx">editor-only</a> |
| /// pragma, just skipped by compiler. |
| struct PragmaRegionHandler : public PragmaHandler { |
| PragmaRegionHandler(const char *pragma) : PragmaHandler(pragma) { } |
| |
| virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer, |
| Token &NameTok) { |
| // #pragma region: endregion matches can be verified |
| // __pragma(region): no sense, but ignored by msvc |
| // _Pragma is not valid for MSVC, but there isn't any point |
| // to handle a _Pragma differently. |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| |
| /// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: |
| /// \#pragma GCC poison/system_header/dependency and \#pragma once. |
| void Preprocessor::RegisterBuiltinPragmas() { |
| AddPragmaHandler(new PragmaOnceHandler()); |
| AddPragmaHandler(new PragmaMarkHandler()); |
| AddPragmaHandler(new PragmaPushMacroHandler()); |
| AddPragmaHandler(new PragmaPopMacroHandler()); |
| AddPragmaHandler(new PragmaMessageHandler(PPCallbacks::PMK_Message)); |
| |
| // #pragma GCC ... |
| AddPragmaHandler("GCC", new PragmaPoisonHandler()); |
| AddPragmaHandler("GCC", new PragmaSystemHeaderHandler()); |
| AddPragmaHandler("GCC", new PragmaDependencyHandler()); |
| AddPragmaHandler("GCC", new PragmaDiagnosticHandler("GCC")); |
| AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Warning, |
| "GCC")); |
| AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Error, |
| "GCC")); |
| // #pragma clang ... |
| AddPragmaHandler("clang", new PragmaPoisonHandler()); |
| AddPragmaHandler("clang", new PragmaSystemHeaderHandler()); |
| AddPragmaHandler("clang", new PragmaDebugHandler()); |
| AddPragmaHandler("clang", new PragmaDependencyHandler()); |
| AddPragmaHandler("clang", new PragmaDiagnosticHandler("clang")); |
| AddPragmaHandler("clang", new PragmaARCCFCodeAuditedHandler()); |
| |
| AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler()); |
| AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler()); |
| AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler()); |
| |
| // MS extensions. |
| if (LangOpts.MicrosoftExt) { |
| AddPragmaHandler(new PragmaWarningHandler()); |
| AddPragmaHandler(new PragmaIncludeAliasHandler()); |
| AddPragmaHandler(new PragmaRegionHandler("region")); |
| AddPragmaHandler(new PragmaRegionHandler("endregion")); |
| } |
| } |