Pragma.cpp revision ff759a66526d6a985fb4efae69c6b798d83364df
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Pragma.cpp - Pragma registration and handling --------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the PragmaHandler/PragmaTable interfaces and implements 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// pragma related methods of the Preprocessor class. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Pragma.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/HeaderSearch.h" 17a9d9145741ef77db45890911674705b81605b10bChris Lattner#include "clang/Lex/LiteralSupport.h" 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 19f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner#include "clang/Lex/MacroInfo.h" 20500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/FileManager.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/SourceManager.h" 23ff759a66526d6a985fb4efae69c6b798d83364dfDaniel Dunbar#include "llvm/Support/CrashRecoveryContext.h" 245505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar#include "llvm/Support/ErrorHandling.h" 252e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor#include <algorithm> 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Out-of-line destructor to provide a home for the class. 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler::~PragmaHandler() { 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 33c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar// EmptyPragmaHandler Implementation. 34c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar//===----------------------------------------------------------------------===// 35c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 369b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios KyrtzidisEmptyPragmaHandler::EmptyPragmaHandler() {} 37c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 38c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbarvoid EmptyPragmaHandler::HandlePragma(Preprocessor &PP, Token &FirstToken) {} 39c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 40c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar//===----------------------------------------------------------------------===// 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// PragmaNamespace Implementation. 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaNamespace::~PragmaNamespace() { 469b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis for (llvm::StringMap<PragmaHandler*>::iterator 479b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis I = Handlers.begin(), E = Handlers.end(); I != E; ++I) 489b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis delete I->second; 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FindHandler - Check to see if there is already a handler for the 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// specified name. If not, return the handler for the null identifier if it 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// exists, otherwise return null. If IgnoreNull is true (the default) then 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the null handler isn't returned on failure to match. 559b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios KyrtzidisPragmaHandler *PragmaNamespace::FindHandler(llvm::StringRef Name, 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool IgnoreNull) const { 579b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis if (PragmaHandler *Handler = Handlers.lookup(Name)) 589b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis return Handler; 599b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis return IgnoreNull ? 0 : Handlers.lookup(llvm::StringRef()); 609b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis} 611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidisvoid PragmaNamespace::AddPragma(PragmaHandler *Handler) { 639b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis assert(!Handlers.lookup(Handler->getName()) && 649b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis "A handler with this name is already registered in this namespace"); 659b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis llvm::StringMapEntry<PragmaHandler *> &Entry = 669b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis Handlers.GetOrCreateValue(Handler->getName()); 679b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis Entry.setValue(Handler); 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 704095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { 719b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis assert(Handlers.lookup(Handler->getName()) && 729b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis "Handler not registered in this namespace"); 739b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis Handlers.erase(Handler->getName()); 744095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 754095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 76d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) { 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // expand it, the user can have a STDC #define, that should not affect this. 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexUnexpandedToken(Tok); 801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the handler for this token. If there is no handler, ignore the pragma. 829b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaHandler *Handler 839b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis = FindHandler(Tok.getIdentifierInfo() ? Tok.getIdentifierInfo()->getName() 849b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis : llvm::StringRef(), 859b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis /*IgnoreNull=*/false); 86af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner if (Handler == 0) { 87af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner PP.Diag(Tok, diag::warn_pragma_ignored); 88af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner return; 89af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner } 901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, pass it down. 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Handler->HandlePragma(PP, Tok); 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Preprocessor Pragma Directive Handling. 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// rest of the pragma, passing it to the registered pragma handlers. 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::HandlePragmaDirective() { 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumPragma; 1031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Invoke the first level of pragma handlers which reads the namespace id. 105d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->HandlePragma(*this, Tok); 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the pragma handler didn't read the rest of the line, consume it now. 109027cff63321262a5a85a402c39aac06ee66c745dChris Lattner if (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective) 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the first token after the directive. The _Pragma token has just 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// been read into 'Tok'. 116d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::Handle_Pragma(Token &Tok) { 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the pragma token location. 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation PragmaLoc = Tok.getLocation(); 1191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '('. 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1223692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::l_paren)) { 1233692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1243692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1253692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '"..."'. 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1293692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 1303692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1313692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1323692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the string. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string StrVal = getSpelling(Tok); 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the ')'. 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1393692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::r_paren)) { 1403692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1413692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1423692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 144e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner SourceLocation RParenLoc = Tok.getLocation(); 1451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 146a9d9145741ef77db45890911674705b81605b10bChris Lattner // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1: 147a9d9145741ef77db45890911674705b81605b10bChris Lattner // "The string literal is destringized by deleting the L prefix, if present, 148a9d9145741ef77db45890911674705b81605b10bChris Lattner // deleting the leading and trailing double-quotes, replacing each escape 149a9d9145741ef77db45890911674705b81605b10bChris Lattner // sequence \" by a double-quote, and replacing each escape sequence \\ by a 150a9d9145741ef77db45890911674705b81605b10bChris Lattner // single backslash." 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[0] == 'L') // Remove L prefix. 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()); 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Invalid string token!"); 1551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove the front quote, replacing it with a space, so that the pragma 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // contents appear to have a space before them. 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[0] = ' '; 1591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1601fa495304c81e03f07f278a47b5efe9317104aabChris Lattner // Replace the terminating quote with a \n. 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[StrVal.size()-1] = '\n'; 1621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove escaped quotes and escapes. 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[i] == '\\' && 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // \\ -> '\' and \" -> '"'. 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()+i); 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --e; 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Plop the string (including the newline and trailing null) into a buffer 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // where we can lex it. 17547246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner Token TmpTok; 17647246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner TmpTok.startToken(); 17747246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner CreateString(&StrVal[0], StrVal.size(), TmpTok); 17847246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner SourceLocation TokLoc = TmpTok.getLocation(); 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Make and enter a lexer object so that we lex and expand the tokens just 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // like any others. 182e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, 1831fa495304c81e03f07f278a47b5efe9317104aabChris Lattner StrVal.size(), *this); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer EnterSourceFileWithLexer(TL, 0); 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // With everything set up, lex this as a #pragma directive. 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HandlePragmaDirective(); 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, return whatever came after the pragma directive. 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Lex(Tok); 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 198d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaOnce(Token &OnceTok) { 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(OnceTok, diag::pp_pragma_once_in_main_file); 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a once-only file now. 2062b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2092243449253475574fc6f14986ff8f7fce5d46799Chris Lattnervoid Preprocessor::HandlePragmaMark() { 21017ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(CurPPLexer && "No current lexer?"); 2116896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner if (CurLexer) 2126896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner CurLexer->ReadToEndOfLine(); 2136896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner else 2146896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner CurPTHLexer->DiscardToEndOfLine(); 2152243449253475574fc6f14986ff8f7fce5d46799Chris Lattner} 2162243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2172243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 220d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 221d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the next token to poison. While doing this, pretend that we are 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // skipping while reading the identifier to poison. 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This avoids errors on code like: 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 22968a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = true; 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LexUnexpandedToken(Tok); 23168a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = false; 2321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we reached the end of line, we're done. 23422f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.is(tok::eom)) return; 2351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Can only poison identifiers. 23722f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.isNot(tok::identifier)) { 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_invalid_poison); 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the identifier info for the token. We disabled identifier lookup 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // by saying we're skipping contents, so we need to do this manually. 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *II = LookUpIdentifierInfo(Tok); 2451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Already poisoned. 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (II->isPoisoned()) continue; 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a macro identifier, emit a warning. 2500edde55077cc3cb9fffeba19f5936f05a68c8e2bChris Lattner if (II->hasMacroDefinition()) 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::pp_poisoning_existing_macro); 2521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, poison it! 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer II->setIsPoisoned(); 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the whole directive has been parsed. 260d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 26735c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek PreprocessorLexer *TheLexer = getCurrentFileLexer(); 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a system header. 2702b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2736896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation()); 2746896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner unsigned FilenameLen = strlen(PLoc.getFilename()); 2756896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename(), 2766896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner FilenameLen); 2771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2786896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // Emit a line marker. This will change any source locations from this point 2796896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // forward to realize they are in a system header. 2806896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // Create a line note with this information. 2816896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine(), FilenameID, 2826896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner false, false, true, false); 2831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Notify the client, if desired, that we are in a new source file. 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Callbacks) 28635c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek Callbacks->FileChanged(SysHeaderTok.getLocation(), 2870b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah. 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 292d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaDependency(Token &DependencyTok) { 293d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token FilenameTok; 29468a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the token kind is EOM, the error has already been diagnosed. 29722f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (FilenameTok.is(tok::eom)) 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reserve a buffer to get the spelling. 301a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner llvm::SmallString<128> FilenameBuffer; 302453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 303453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor llvm::StringRef Filename = getSpelling(FilenameTok, FilenameBuffer, &Invalid); 304453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 305453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return; 3061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 307a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner bool isAngled = 308a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If GetIncludeFilenameSpelling set the start ptr to null, there was an 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // error. 311a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Filename.empty()) 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Search include directories for this file. 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *CurDir; 316f45b646244705410866d62f1d8bf017a047ed662Chris Lattner const FileEntry *File = LookupFile(Filename, isAngled, 0, CurDir); 31756b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner if (File == 0) { 318a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; 31956b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner return; 32056b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner } 3211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3222b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this file is older than the file it depends on, emit a diagnostic. 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex tokens at the end of the message and include them in the message. 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string Message; 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 32922f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner while (DependencyTok.isNot(tok::eom)) { 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message += getSpelling(DependencyTok) + " "; 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message.erase(Message.end()-1); 33556b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 339636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 340636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// syntax is: 341636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// #pragma comment(linker, "foo") 342636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 343636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// "foo" is a string, which is fully macro expanded, and permits string 344d7ee349f1dd84e023d09a35fb4d40c15888a55acGabor Greif/// concatenation, embedded escape characters etc. See MSDN for more details. 345636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnervoid Preprocessor::HandlePragmaComment(Token &Tok) { 346636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner SourceLocation CommentLoc = Tok.getLocation(); 347636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 348636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::l_paren)) { 349636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 350636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 351636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 353636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Read the identifier. 354636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 355636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::identifier)) { 356636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 357636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 358636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 360636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Verify that this is one of the 5 whitelisted options. 361636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: warn that 'exestr' is deprecated. 362636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner const IdentifierInfo *II = Tok.getIdentifierInfo(); 3631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 364636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner !II->isStr("linker") && !II->isStr("user")) { 365636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 366636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 367636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 369a9d9145741ef77db45890911674705b81605b10bChris Lattner // Read the optional string if present. 370636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 371a9d9145741ef77db45890911674705b81605b10bChris Lattner std::string ArgumentString; 372636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.is(tok::comma)) { 373a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the comma. 374636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 375636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // We need at least one string. 376edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::string_literal)) { 377636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 378636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 379636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 380636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 381636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // String concatenation allows multiple strings, which can even come from 382636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // macro expansion. 383636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // "foo " "bar" "Baz" 384a9d9145741ef77db45890911674705b81605b10bChris Lattner llvm::SmallVector<Token, 4> StrToks; 385edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner while (Tok.is(tok::string_literal)) { 386a9d9145741ef77db45890911674705b81605b10bChris Lattner StrToks.push_back(Tok); 387636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 388a9d9145741ef77db45890911674705b81605b10bChris Lattner } 389a9d9145741ef77db45890911674705b81605b10bChris Lattner 390a9d9145741ef77db45890911674705b81605b10bChris Lattner // Concatenate and parse the strings. 391a9d9145741ef77db45890911674705b81605b10bChris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 392a9d9145741ef77db45890911674705b81605b10bChris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 393a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.hadError) 394a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 395a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.Pascal) { 396a9d9145741ef77db45890911674705b81605b10bChris Lattner Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed); 397a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 398a9d9145741ef77db45890911674705b81605b10bChris Lattner } 399a9d9145741ef77db45890911674705b81605b10bChris Lattner 400a9d9145741ef77db45890911674705b81605b10bChris Lattner ArgumentString = std::string(Literal.GetString(), 401a9d9145741ef77db45890911674705b81605b10bChris Lattner Literal.GetString()+Literal.GetStringLength()); 402636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 4031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 404a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: If the kind is "compiler" warn if the string is present (it is 405a9d9145741ef77db45890911674705b81605b10bChris Lattner // ignored). 406a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'lib' requires a comment string. 407a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'linker' requires a comment string, and has a specific list of 408a9d9145741ef77db45890911674705b81605b10bChris Lattner // things that are allowable. 4091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 410636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::r_paren)) { 411636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 412636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 413636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 414a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the r_paren. 415636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 416636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::eom)) { 417636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 418636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 419636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 4201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 421a9d9145741ef77db45890911674705b81605b10bChris Lattner // If the pragma is lexically sound, notify any interested PPCallbacks. 422172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner if (Callbacks) 423172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner Callbacks->PragmaComment(CommentLoc, II, ArgumentString); 424636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner} 425636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 426abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// HandlePragmaMessage - Handle the microsoft #pragma message extension. The 427abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// syntax is: 428abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// #pragma message(messagestring) 429abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// messagestring is a string, which is fully macro expanded, and permits string 430abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// concatenation, embedded escape characters etc. See MSDN for more details. 431abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattnervoid Preprocessor::HandlePragmaMessage(Token &Tok) { 432abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner SourceLocation MessageLoc = Tok.getLocation(); 433abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Lex(Tok); 434abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Tok.isNot(tok::l_paren)) { 435abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(MessageLoc, diag::err_pragma_message_malformed); 436abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 437abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 438abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 439abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // Read the string. 440abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Lex(Tok); 441abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 442abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 443abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // We need at least one string. 444abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Tok.isNot(tok::string_literal)) { 445abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 446abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 447abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 448abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 449abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // String concatenation allows multiple strings, which can even come from 450abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // macro expansion. 451abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // "foo " "bar" "Baz" 452abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner llvm::SmallVector<Token, 4> StrToks; 453abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner while (Tok.is(tok::string_literal)) { 454abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner StrToks.push_back(Tok); 455abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Lex(Tok); 456abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 457abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 458abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // Concatenate and parse the strings. 459abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 460abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 461abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Literal.hadError) 462abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 463abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Literal.Pascal) { 464abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(StrToks[0].getLocation(), diag::err_pragma_message_malformed); 465abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 466abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 467abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 468abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner llvm::StringRef MessageString(Literal.GetString(), Literal.GetStringLength()); 469636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 470abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Tok.isNot(tok::r_paren)) { 471abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 472abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 473abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 474abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Lex(Tok); // eat the r_paren. 475abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 476abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Tok.isNot(tok::eom)) { 477abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_message_malformed); 478abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner return; 479abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 480abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 481abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // Output the message. 482abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Diag(MessageLoc, diag::warn_pragma_message) << MessageString; 483abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 484abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner // If the pragma is lexically sound, notify any interested PPCallbacks. 485abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Callbacks) 486abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner Callbacks->PragmaMessage(MessageLoc, MessageString); 487abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner} 488636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 489f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro. 490f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// Return the IdentifierInfo* associated with the macro to push or pop. 491f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerIdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) { 492f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Remember the pragma token location. 493f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Token PragmaTok = Tok; 494f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 495f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Read the '('. 496f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Lex(Tok); 497f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (Tok.isNot(tok::l_paren)) { 498f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 499f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner << getSpelling(PragmaTok); 500f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return 0; 501f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 502f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 503f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Read the macro name string. 504f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Lex(Tok); 505f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (Tok.isNot(tok::string_literal)) { 506f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 507f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner << getSpelling(PragmaTok); 508f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return 0; 509f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 510f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 511f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Remember the macro string. 512f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner std::string StrVal = getSpelling(Tok); 513f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 514f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Read the ')'. 515f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Lex(Tok); 516f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (Tok.isNot(tok::r_paren)) { 517f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) 518f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner << getSpelling(PragmaTok); 519f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return 0; 520f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 521f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 522f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 523f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner "Invalid string token!"); 524f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 525f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Create a Token from the string. 526f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Token MacroTok; 527f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroTok.startToken(); 528f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroTok.setKind(tok::identifier); 529f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner CreateString(&StrVal[1], StrVal.size() - 2, MacroTok); 530f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 531f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Get the IdentifierInfo of MacroToPushTok. 532f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return LookUpIdentifierInfo(MacroTok); 533f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 534f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 535f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// HandlePragmaPushMacro - Handle #pragma push_macro. 536f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// The syntax is: 537f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// #pragma push_macro("macro") 538f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattnervoid Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) { 539f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Parse the pragma directive and get the macro IdentifierInfo*. 540f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok); 541f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (!IdentInfo) return; 542f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 543f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Get the MacroInfo associated with IdentInfo. 544f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MI = getMacroInfo(IdentInfo); 545f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 546f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MacroCopyToPush = 0; 547f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (MI) { 548f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Make a clone of MI. 549f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroCopyToPush = CloneMacroInfo(*MI); 550f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 551f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Allow the original MacroInfo to be redefined later. 552f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MI->setIsAllowRedefinitionsWithoutWarning(true); 553f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 554f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 555f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Push the cloned MacroInfo so we can retrieve it later. 556f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PragmaPushMacroInfo[IdentInfo].push_back(MacroCopyToPush); 557f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 558f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 559f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// HandlePragmaPopMacro - Handle #pragma push_macro. 560f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// The syntax is: 561f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// #pragma pop_macro("macro") 562f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattnervoid Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) { 563f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner SourceLocation MessageLoc = PopMacroTok.getLocation(); 564f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 565f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Parse the pragma directive and get the macro IdentifierInfo*. 566f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok); 567f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (!IdentInfo) return; 568f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 569f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Find the vector<MacroInfo*> associated with the macro. 570f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner llvm::DenseMap<IdentifierInfo*, std::vector<MacroInfo*> >::iterator iter = 571f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PragmaPushMacroInfo.find(IdentInfo); 572f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (iter != PragmaPushMacroInfo.end()) { 573f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Release the MacroInfo currently associated with IdentInfo. 574f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *CurrentMI = getMacroInfo(IdentInfo); 575f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (CurrentMI) ReleaseMacroInfo(CurrentMI); 576f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 577f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Get the MacroInfo we want to reinstall. 578f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MacroToReInstall = iter->second.back(); 579f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 580f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Reinstall the previously pushed macro. 581f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner setMacroInfo(IdentInfo, MacroToReInstall); 582f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 583f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Pop PragmaPushMacroInfo stack. 584f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner iter->second.pop_back(); 585f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (iter->second.size() == 0) 586f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PragmaPushMacroInfo.erase(iter); 587f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } else { 588f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner Diag(MessageLoc, diag::warn_pragma_pop_macro_no_push) 589f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner << IdentInfo->getName(); 590f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 591f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If 'Namespace' is non-null, then it is a token required to exist on the 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 5969b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidisvoid Preprocessor::AddPragmaHandler(llvm::StringRef Namespace, 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler) { 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *InsertNS = PragmaHandlers; 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is specified to be in a namespace, step down into it. 6019b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis if (!Namespace.empty()) { 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is already a pragma handler with the name of this namespace, 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we either have an error (directive with the same name as a namespace) or 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we already have the namespace to insert into. 6059b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis if (PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace)) { 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = Existing->getIfNamespace(); 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer " handler with the same name!"); 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this namespace doesn't exist yet, create and insert the 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // handler for it. 6129b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis InsertNS = new PragmaNamespace(Namespace); 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->AddPragma(InsertNS); 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check to make sure we don't already have a pragma for this identifier. 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!InsertNS->FindHandler(Handler->getName()) && 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Pragma handler already exists for this identifier!"); 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS->AddPragma(Handler); 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6234095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// RemovePragmaHandler - Remove the specific pragma handler from the 6244095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// preprocessor. If \arg Namespace is non-null, then it should be the 6254095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// namespace that \arg Handler was added to. It is an error to remove 6264095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// a handler that has not been registered. 6279b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidisvoid Preprocessor::RemovePragmaHandler(llvm::StringRef Namespace, 6284095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Handler) { 6294095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaNamespace *NS = PragmaHandlers; 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6314095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is specified to be in a namespace, step down into it. 6329b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis if (!Namespace.empty()) { 6339b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace); 6344095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(Existing && "Namespace containing handler does not exist!"); 6354095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 6364095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS = Existing->getIfNamespace(); 6374095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 6384095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 6394095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 6404095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS->RemovePragmaHandler(Handler); 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6424095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is a non-default namespace and it is now empty, remove 6434095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // it. 6444095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (NS != PragmaHandlers && NS->IsEmpty()) 6454095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandlers->RemovePragmaHandler(NS); 6464095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 6474095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace { 6492243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaOnceHandler : public PragmaHandler { 6519b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaOnceHandler() : PragmaHandler("once") {} 652d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &OnceTok) { 65335410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma once"); 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaOnce(OnceTok); 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6582243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 6592243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// rest of the line is not lexed. 6602243449253475574fc6f14986ff8f7fce5d46799Chris Lattnerstruct PragmaMarkHandler : public PragmaHandler { 6619b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaMarkHandler() : PragmaHandler("mark") {} 6622243449253475574fc6f14986ff8f7fce5d46799Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &MarkTok) { 6632243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PP.HandlePragmaMark(); 6642243449253475574fc6f14986ff8f7fce5d46799Chris Lattner } 6652243449253475574fc6f14986ff8f7fce5d46799Chris Lattner}; 6662243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 6672243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaPoisonHandler : public PragmaHandler { 6699b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaPoisonHandler() : PragmaHandler("poison") {} 670d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PoisonTok) { 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaPoison(PoisonTok); 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6752243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 6762243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// as a system header, which silences warnings in it. 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaSystemHeaderHandler : public PragmaHandler { 6789b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaSystemHeaderHandler() : PragmaHandler("system_header") {} 679d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &SHToken) { 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaSystemHeader(SHToken); 68135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma"); 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaDependencyHandler : public PragmaHandler { 6859b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaDependencyHandler() : PragmaHandler("dependency") {} 686d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaDependency(DepToken); 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbarstruct PragmaDebugHandler : public PragmaHandler { 692abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar PragmaDebugHandler() : PragmaHandler("__debug") {} 693abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 694abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar Token Tok; 695abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar PP.LexUnexpandedToken(Tok); 696abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar if (Tok.isNot(tok::identifier)) { 697abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_invalid); 698abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar return; 699abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar } 700abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar IdentifierInfo *II = Tok.getIdentifierInfo(); 701abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar 7025505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar if (II->isStr("assert")) { 7035505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar assert(0 && "This is an assertion!"); 704abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar } else if (II->isStr("crash")) { 7055505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar *(volatile int*) 0x11 = 0; 7065505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar } else if (II->isStr("llvm_fatal_error")) { 7075505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar llvm::report_fatal_error("#pragma clang __debug llvm_fatal_error"); 7085505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar } else if (II->isStr("llvm_unreachable")) { 7095505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar llvm_unreachable("#pragma clang __debug llvm_unreachable"); 7105505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar } else if (II->isStr("overflow_stack")) { 7115505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar DebugOverflowStack(); 712ff759a66526d6a985fb4efae69c6b798d83364dfDaniel Dunbar } else if (II->isStr("handle_crash")) { 713ff759a66526d6a985fb4efae69c6b798d83364dfDaniel Dunbar llvm::CrashRecoveryContext *CRC =llvm::CrashRecoveryContext::GetCurrent(); 714ff759a66526d6a985fb4efae69c6b798d83364dfDaniel Dunbar if (CRC) 715ff759a66526d6a985fb4efae69c6b798d83364dfDaniel Dunbar CRC->HandleCrash(); 7165505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar } else { 7175505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command) 7185505413ee8e4e2924f52ba81181071f3a492e7d9Daniel Dunbar << II->getName(); 719abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar } 720abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar } 721abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar 722abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar void DebugOverflowStack() { 723abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar DebugOverflowStack(); 724abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar } 725abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar}; 726abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar 727edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner/// PragmaDiagnosticHandler - e.g. '#pragma GCC diagnostic ignored "-Wformat"' 72804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// Since clang's diagnostic supports extended functionality beyond GCC's 72904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// the constructor takes a clangMode flag to tell it whether or not to allow 73004ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// clang's extended functionality, or whether to reject it. 731edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattnerstruct PragmaDiagnosticHandler : public PragmaHandler { 73204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattnerprivate: 73304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner const bool ClangMode; 73404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattnerpublic: 7359b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis explicit PragmaDiagnosticHandler(const bool clangMode) 7369b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis : PragmaHandler("diagnostic"), ClangMode(clangMode) {} 7379b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis 738edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DiagToken) { 739edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Token Tok; 740edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 741edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::identifier)) { 74204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid 74304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner : diag::warn_pragma_diagnostic_gcc_invalid; 74404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, Diag); 745edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 746edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 747edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 749edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::Mapping Map; 750edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (II->isStr("warning")) 751edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_WARNING; 752edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("error")) 753edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_ERROR; 754edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("ignored")) 755edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_IGNORE; 756edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("fatal")) 757edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_FATAL; 75804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner else if (ClangMode) { 75904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner if (II->isStr("pop")) { 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!PP.getDiagnostics().popMappings()) 76104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_cannot_ppp); 76204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner return; 76304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } 76404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 76504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner if (II->isStr("push")) { 76604ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.getDiagnostics().pushMappings(); 7671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return; 76804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } 76904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 77004ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_invalid); 77104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner return; 77204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } else { 77304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_gcc_invalid); 774edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 775edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 777edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 778edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner 779edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // We need at least one string. 780edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::string_literal)) { 781edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 782edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 783edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 7841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 785edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // String concatenation allows multiple strings, which can even come from 786edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // macro expansion. 787edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // "foo " "bar" "Baz" 788edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner llvm::SmallVector<Token, 4> StrToks; 789edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner while (Tok.is(tok::string_literal)) { 790edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner StrToks.push_back(Tok); 791edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 792edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 794edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::eom)) { 795edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 796edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 797edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 7981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 799edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // Concatenate and parse the strings. 800edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), PP); 801edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 802edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Literal.hadError) 803edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 804edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Literal.Pascal) { 80504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid 80604ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner : diag::warn_pragma_diagnostic_gcc_invalid; 80704ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, Diag); 808edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 809edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 81004ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 811edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner std::string WarningName(Literal.GetString(), 812edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Literal.GetString()+Literal.GetStringLength()); 813edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner 814edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (WarningName.size() < 3 || WarningName[0] != '-' || 815edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner WarningName[1] != 'W') { 816edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(StrToks[0].getLocation(), 817edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::warn_pragma_diagnostic_invalid_option); 818edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 819edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 8201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 821edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.c_str()+2, 822edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map)) 823edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(StrToks[0].getLocation(), 824edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::warn_pragma_diagnostic_unknown_warning) << WarningName; 825edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 826edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner}; 8271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 828636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// PragmaCommentHandler - "#pragma comment ...". 829636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnerstruct PragmaCommentHandler : public PragmaHandler { 8309b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaCommentHandler() : PragmaHandler("comment") {} 831636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 832636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PP.HandlePragmaComment(CommentTok); 833636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 834636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner}; 8351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 836abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner/// PragmaMessageHandler - "#pragma message("...")". 837abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattnerstruct PragmaMessageHandler : public PragmaHandler { 8389b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaMessageHandler() : PragmaHandler("message") {} 839abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 840abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner PP.HandlePragmaMessage(CommentTok); 841abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 842abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner}; 843abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner 844f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// PragmaPushMacroHandler - "#pragma push_macro" saves the value of the 845f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// macro on the top of the stack. 846f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattnerstruct PragmaPushMacroHandler : public PragmaHandler { 847f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PragmaPushMacroHandler() : PragmaHandler("push_macro") {} 848f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PushMacroTok) { 849f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PP.HandlePragmaPushMacro(PushMacroTok); 850f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 851f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner}; 852f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 853f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 854f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// PragmaPopMacroHandler - "#pragma pop_macro" sets the value of the 855f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner/// macro to the value on the top of the stack. 856f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattnerstruct PragmaPopMacroHandler : public PragmaHandler { 857f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PragmaPopMacroHandler() : PragmaHandler("pop_macro") {} 858f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PopMacroTok) { 859f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner PP.HandlePragmaPopMacro(PopMacroTok); 860f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner } 861f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner}; 862f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 863062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner// Pragma STDC implementations. 8646c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 8656c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattnerenum STDCSetting { 8666c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner STDC_ON, STDC_OFF, STDC_DEFAULT, STDC_INVALID 8676c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner}; 8681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8696c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattnerstatic STDCSetting LexOnOffSwitch(Preprocessor &PP) { 8706c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Token Tok; 8716c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.LexUnexpandedToken(Tok); 8726c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 8736c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (Tok.isNot(tok::identifier)) { 8746c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax); 8756c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return STDC_INVALID; 8766c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner } 8776c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 8786c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner STDCSetting Result; 8796c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (II->isStr("ON")) 8806c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_ON; 8816c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else if (II->isStr("OFF")) 8826c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_OFF; 8836c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else if (II->isStr("DEFAULT")) 8846c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_DEFAULT; 8856c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else { 8866c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax); 8876c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return STDC_INVALID; 8886c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner } 8896c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 8906c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // Verify that this is followed by EOM. 8916c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.LexUnexpandedToken(Tok); 8926c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (Tok.isNot(tok::eom)) 8936c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax_eom); 8946c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return Result; 8956c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner} 8961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 897062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FP_CONTRACTHandler - "#pragma STDC FP_CONTRACT ...". 898062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FP_CONTRACTHandler : public PragmaHandler { 8999b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaSTDC_FP_CONTRACTHandler() : PragmaHandler("FP_CONTRACT") {} 900f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 9016c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // We just ignore the setting of FP_CONTRACT. Since we don't do contractions 9026c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // at all, our default is OFF and setting it to ON is an optimization hint 9036c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // we can safely ignore. When we support -ffma or something, we would need 9046c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // to diagnose that we are ignoring FMA. 9056c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner LexOnOffSwitch(PP); 906062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 907062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 9081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 909062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FENV_ACCESSHandler - "#pragma STDC FENV_ACCESS ...". 910062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler { 9119b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaSTDC_FENV_ACCESSHandler() : PragmaHandler("FENV_ACCESS") {} 912f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 9134d8aac3778b40c161bed9964125948ee01c08821Chris Lattner if (LexOnOffSwitch(PP) == STDC_ON) 9144d8aac3778b40c161bed9964125948ee01c08821Chris Lattner PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported); 915062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 916062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 9171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 918062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_CX_LIMITED_RANGEHandler - "#pragma STDC CX_LIMITED_RANGE ...". 919062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler { 9209b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaSTDC_CX_LIMITED_RANGEHandler() 9219b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis : PragmaHandler("CX_LIMITED_RANGE") {} 922f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 9236c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner LexOnOffSwitch(PP); 924062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 925062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 9261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 927062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_UnknownHandler - "#pragma STDC ...". 928062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_UnknownHandler : public PragmaHandler { 9299b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis PragmaSTDC_UnknownHandler() {} 930f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &UnknownTok) { 9316c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // C99 6.10.6p2, unknown forms are not allowed. 932f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored); 933062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 934062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 9351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end anonymous namespace 9375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 9405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// #pragma GCC poison/system_header/dependency and #pragma once. 9415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::RegisterBuiltinPragmas() { 9429b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler(new PragmaOnceHandler()); 9439b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler(new PragmaMarkHandler()); 944f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner AddPragmaHandler(new PragmaPushMacroHandler()); 945f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner AddPragmaHandler(new PragmaPopMacroHandler()); 9461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 947e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner // #pragma GCC ... 9489b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("GCC", new PragmaPoisonHandler()); 9499b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("GCC", new PragmaSystemHeaderHandler()); 9509b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("GCC", new PragmaDependencyHandler()); 9519b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("GCC", new PragmaDiagnosticHandler(false)); 952e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner // #pragma clang ... 9539b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("clang", new PragmaPoisonHandler()); 9549b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("clang", new PragmaSystemHeaderHandler()); 955abf7b72a965efba4a5ac6f85c66d5aba0c83f972Daniel Dunbar AddPragmaHandler("clang", new PragmaDebugHandler()); 9569b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("clang", new PragmaDependencyHandler()); 9579b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("clang", new PragmaDiagnosticHandler(true)); 9589b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis 9599b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("STDC", new PragmaSTDC_FP_CONTRACTHandler()); 9609b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler()); 9619b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler()); 962062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler()); 9631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 964636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // MS extensions. 965abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner if (Features.Microsoft) { 9669b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler(new PragmaCommentHandler()); 9679b36c3f0de0105e903130bbda3c4aea7d792c0afArgyrios Kyrtzidis AddPragmaHandler(new PragmaMessageHandler()); 968abfe094ce71c42656dcb84a3bdc3e79cb3c16fc3Chris Lattner } 9695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 970