Pragma.cpp revision c72cc5072cdc1a1a6e05f9d0f962f293a69248c4
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" 19500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/FileManager.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/SourceManager.h" 222e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor#include <algorithm> 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Out-of-line destructor to provide a home for the class. 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler::~PragmaHandler() { 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 30c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar// EmptyPragmaHandler Implementation. 31c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar//===----------------------------------------------------------------------===// 32c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 33c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel DunbarEmptyPragmaHandler::EmptyPragmaHandler() : PragmaHandler(0) {} 34c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 35c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbarvoid EmptyPragmaHandler::HandlePragma(Preprocessor &PP, Token &FirstToken) {} 36c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar 37c72cc5072cdc1a1a6e05f9d0f962f293a69248c4Daniel Dunbar//===----------------------------------------------------------------------===// 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// PragmaNamespace Implementation. 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaNamespace::~PragmaNamespace() { 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete Handlers[i]; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FindHandler - Check to see if there is already a handler for the 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// specified name. If not, return the handler for the null identifier if it 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// exists, otherwise return null. If IgnoreNull is true (the default) then 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// the null handler isn't returned on failure to match. 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerPragmaHandler *PragmaNamespace::FindHandler(const IdentifierInfo *Name, 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool IgnoreNull) const { 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *NullHandler = 0; 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Handlers[i]->getName() == Name) 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Handlers[i]; 571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Handlers[i]->getName() == 0) 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer NullHandler = Handlers[i]; 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return IgnoreNull ? 0 : NullHandler; 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 644095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { 654095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { 664095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Handlers[i] == Handler) { 674095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers[i] = Handlers.back(); 684095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar Handlers.pop_back(); 694095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar return; 704095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 714095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 724095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(0 && "Handler not registered in this namespace"); 734095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 744095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 75d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) { 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // expand it, the user can have a STDC #define, that should not affect this. 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.LexUnexpandedToken(Tok); 791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the handler for this token. If there is no handler, ignore the pragma. 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler = FindHandler(Tok.getIdentifierInfo(), false); 82af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner if (Handler == 0) { 83af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner PP.Diag(Tok, diag::warn_pragma_ignored); 84af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner return; 85af7cdf45da4925f788e87a4c318ee67404646088Chris Lattner } 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, pass it down. 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Handler->HandlePragma(PP, Tok); 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Preprocessor Pragma Directive Handling. 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDirective - The "#pragma" directive has been parsed. Lex the 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// rest of the pragma, passing it to the registered pragma handlers. 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::HandlePragmaDirective() { 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumPragma; 991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Invoke the first level of pragma handlers which reads the namespace id. 101d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->HandlePragma(*this, Tok); 1031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the pragma handler didn't read the rest of the line, consume it now. 105027cff63321262a5a85a402c39aac06ee66c745dChris Lattner if (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective) 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DiscardUntilEndOfDirective(); 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// return the first token after the directive. The _Pragma token has just 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// been read into 'Tok'. 112d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::Handle_Pragma(Token &Tok) { 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the pragma token location. 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation PragmaLoc = Tok.getLocation(); 1151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '('. 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1183692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::l_paren)) { 1193692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1203692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1213692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the '"..."'. 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1253692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) { 1263692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1273692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1283692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember the string. 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string StrVal = getSpelling(Tok); 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the ')'. 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Tok); 1353692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (Tok.isNot(tok::r_paren)) { 1363692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(PragmaLoc, diag::err__Pragma_malformed); 1373692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1383692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 140e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner SourceLocation RParenLoc = Tok.getLocation(); 1411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 142a9d9145741ef77db45890911674705b81605b10bChris Lattner // The _Pragma is lexically sound. Destringize according to C99 6.10.9.1: 143a9d9145741ef77db45890911674705b81605b10bChris Lattner // "The string literal is destringized by deleting the L prefix, if present, 144a9d9145741ef77db45890911674705b81605b10bChris Lattner // deleting the leading and trailing double-quotes, replacing each escape 145a9d9145741ef77db45890911674705b81605b10bChris Lattner // sequence \" by a double-quote, and replacing each escape sequence \\ by a 146a9d9145741ef77db45890911674705b81605b10bChris Lattner // single backslash." 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[0] == 'L') // Remove L prefix. 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()); 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' && 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Invalid string token!"); 1511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove the front quote, replacing it with a space, so that the pragma 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // contents appear to have a space before them. 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[0] = ' '; 1551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1561fa495304c81e03f07f278a47b5efe9317104aabChris Lattner // Replace the terminating quote with a \n. 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal[StrVal.size()-1] = '\n'; 1581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remove escaped quotes and escapes. 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) { 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StrVal[i] == '\\' && 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer (StrVal[i+1] == '\\' || StrVal[i+1] == '"')) { 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // \\ -> '\' and \" -> '"'. 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrVal.erase(StrVal.begin()+i); 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --e; 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Plop the string (including the newline and trailing null) into a buffer 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // where we can lex it. 17147246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner Token TmpTok; 17247246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner TmpTok.startToken(); 17347246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner CreateString(&StrVal[0], StrVal.size(), TmpTok); 17447246be8ac5b0ddde6c402b8fc6946b6135487b5Chris Lattner SourceLocation TokLoc = TmpTok.getLocation(); 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Make and enter a lexer object so that we lex and expand the tokens just 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // like any others. 178e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, 1791fa495304c81e03f07f278a47b5efe9317104aabChris Lattner StrVal.size(), *this); 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer EnterSourceFileWithLexer(TL, 0); 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // With everything set up, lex this as a #pragma directive. 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HandlePragmaDirective(); 1851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, return whatever came after the pragma directive. 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Lex(Tok); 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaOnce - Handle #pragma once. OnceTok is the 'once'. 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 194d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaOnce(Token &OnceTok) { 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(OnceTok, diag::pp_pragma_once_in_main_file); 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a once-only file now. 2022b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2052243449253475574fc6f14986ff8f7fce5d46799Chris Lattnervoid Preprocessor::HandlePragmaMark() { 20617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(CurPPLexer && "No current lexer?"); 2076896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner if (CurLexer) 2086896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner CurLexer->ReadToEndOfLine(); 2096896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner else 2106896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner CurPTHLexer->DiscardToEndOfLine(); 2112243449253475574fc6f14986ff8f7fce5d46799Chris Lattner} 2122243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2132243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaPoison - Handle #pragma GCC poison. PoisonTok is the 'poison'. 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 216d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaPoison(Token &PoisonTok) { 217d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token Tok; 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read the next token to poison. While doing this, pretend that we are 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // skipping while reading the identifier to poison. 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This avoids errors on code like: 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // #pragma GCC poison X 22568a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = true; 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LexUnexpandedToken(Tok); 22768a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek if (CurPPLexer) CurPPLexer->LexingRawMode = false; 2281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we reached the end of line, we're done. 23022f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.is(tok::eom)) return; 2311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Can only poison identifiers. 23322f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (Tok.isNot(tok::identifier)) { 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_pp_invalid_poison); 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the identifier info for the token. We disabled identifier lookup 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // by saying we're skipping contents, so we need to do this manually. 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *II = LookUpIdentifierInfo(Tok); 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Already poisoned. 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (II->isPoisoned()) continue; 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a macro identifier, emit a warning. 2460edde55077cc3cb9fffeba19f5936f05a68c8e2bChris Lattner if (II->hasMacroDefinition()) 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::pp_poisoning_existing_macro); 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Finally, poison it! 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer II->setIsPoisoned(); 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaSystemHeader - Implement #pragma GCC system_header. We know 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the whole directive has been parsed. 256d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isInPrimaryFile()) { 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. 26335c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek PreprocessorLexer *TheLexer = getCurrentFileLexer(); 2641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Mark the file as a system header. 2662b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); 2671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2696896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation()); 2706896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner unsigned FilenameLen = strlen(PLoc.getFilename()); 2716896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename(), 2726896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner FilenameLen); 2731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2746896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // Emit a line marker. This will change any source locations from this point 2756896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // forward to realize they are in a system header. 2766896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner // Create a line note with this information. 2776896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine(), FilenameID, 2786896a371e302c63ce3d4a99ad2c32e42dde6a9e4Chris Lattner false, false, true, false); 2791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Notify the client, if desired, that we are in a new source file. 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Callbacks) 28235c10c25ddec4effbd26dead23ea5b04ee32f45aTed Kremenek Callbacks->FileChanged(SysHeaderTok.getLocation(), 2830b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HandlePragmaDependency - Handle #pragma GCC dependency "foo" blah. 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 288d217773f106856a11879ec79dc468efefaf2ee75Chris Lattnervoid Preprocessor::HandlePragmaDependency(Token &DependencyTok) { 289d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner Token FilenameTok; 29068a91d5736c2c03d60a9d1c59d08191b8e0d6c52Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the token kind is EOM, the error has already been diagnosed. 29322f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner if (FilenameTok.is(tok::eom)) 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reserve a buffer to get the spelling. 297a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner llvm::SmallString<128> FilenameBuffer; 298453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 299453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor llvm::StringRef Filename = getSpelling(FilenameTok, FilenameBuffer, &Invalid); 300453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 301453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return; 3021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 303a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner bool isAngled = 304a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If GetIncludeFilenameSpelling set the start ptr to null, there was an 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // error. 307a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Filename.empty()) 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Search include directories for this file. 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *CurDir; 312f45b646244705410866d62f1d8bf017a047ed662Chris Lattner const FileEntry *File = LookupFile(Filename, isAngled, 0, CurDir); 31356b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner if (File == 0) { 314a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; 31556b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner return; 31656b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner } 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3182b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this file is older than the file it depends on, emit a diagnostic. 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex tokens at the end of the message and include them in the message. 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string Message; 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 32522f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner while (DependencyTok.isNot(tok::eom)) { 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message += getSpelling(DependencyTok) + " "; 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(DependencyTok); 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Message.erase(Message.end()-1); 33156b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message; 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 335636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// HandlePragmaComment - Handle the microsoft #pragma comment extension. The 336636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// syntax is: 337636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// #pragma comment(linker, "foo") 338636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user. 339636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// "foo" is a string, which is fully macro expanded, and permits string 340d7ee349f1dd84e023d09a35fb4d40c15888a55acGabor Greif/// concatenation, embedded escape characters etc. See MSDN for more details. 341636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnervoid Preprocessor::HandlePragmaComment(Token &Tok) { 342636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner SourceLocation CommentLoc = Tok.getLocation(); 343636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 344636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::l_paren)) { 345636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 346636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 347636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 349636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Read the identifier. 350636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 351636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::identifier)) { 352636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(CommentLoc, diag::err_pragma_comment_malformed); 353636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 354636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 356636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // Verify that this is one of the 5 whitelisted options. 357636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // FIXME: warn that 'exestr' is deprecated. 358636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner const IdentifierInfo *II = Tok.getIdentifierInfo(); 3591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") && 360636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner !II->isStr("linker") && !II->isStr("user")) { 361636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind); 362636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 363636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 365a9d9145741ef77db45890911674705b81605b10bChris Lattner // Read the optional string if present. 366636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 367a9d9145741ef77db45890911674705b81605b10bChris Lattner std::string ArgumentString; 368636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.is(tok::comma)) { 369a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the comma. 370636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 371636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // We need at least one string. 372edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::string_literal)) { 373636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 374636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 375636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 376636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 377636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // String concatenation allows multiple strings, which can even come from 378636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // macro expansion. 379636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // "foo " "bar" "Baz" 380a9d9145741ef77db45890911674705b81605b10bChris Lattner llvm::SmallVector<Token, 4> StrToks; 381edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner while (Tok.is(tok::string_literal)) { 382a9d9145741ef77db45890911674705b81605b10bChris Lattner StrToks.push_back(Tok); 383636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Lex(Tok); 384a9d9145741ef77db45890911674705b81605b10bChris Lattner } 385a9d9145741ef77db45890911674705b81605b10bChris Lattner 386a9d9145741ef77db45890911674705b81605b10bChris Lattner // Concatenate and parse the strings. 387a9d9145741ef77db45890911674705b81605b10bChris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this); 388a9d9145741ef77db45890911674705b81605b10bChris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 389a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.hadError) 390a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 391a9d9145741ef77db45890911674705b81605b10bChris Lattner if (Literal.Pascal) { 392a9d9145741ef77db45890911674705b81605b10bChris Lattner Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed); 393a9d9145741ef77db45890911674705b81605b10bChris Lattner return; 394a9d9145741ef77db45890911674705b81605b10bChris Lattner } 395a9d9145741ef77db45890911674705b81605b10bChris Lattner 396a9d9145741ef77db45890911674705b81605b10bChris Lattner ArgumentString = std::string(Literal.GetString(), 397a9d9145741ef77db45890911674705b81605b10bChris Lattner Literal.GetString()+Literal.GetStringLength()); 398636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 3991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 400a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: If the kind is "compiler" warn if the string is present (it is 401a9d9145741ef77db45890911674705b81605b10bChris Lattner // ignored). 402a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'lib' requires a comment string. 403a9d9145741ef77db45890911674705b81605b10bChris Lattner // FIXME: 'linker' requires a comment string, and has a specific list of 404a9d9145741ef77db45890911674705b81605b10bChris Lattner // things that are allowable. 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 406636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::r_paren)) { 407636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 408636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 409636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 410a9d9145741ef77db45890911674705b81605b10bChris Lattner Lex(Tok); // eat the r_paren. 411636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 412636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Tok.isNot(tok::eom)) { 413636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner Diag(Tok.getLocation(), diag::err_pragma_comment_malformed); 414636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner return; 415636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 417a9d9145741ef77db45890911674705b81605b10bChris Lattner // If the pragma is lexically sound, notify any interested PPCallbacks. 418172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner if (Callbacks) 419172e336b12fa32a1737f66d77a3f2de86f9cc8e8Chris Lattner Callbacks->PragmaComment(CommentLoc, II, ArgumentString); 420636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner} 421636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 422636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 423636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If 'Namespace' is non-null, then it is a token required to exist on the 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 4281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::AddPragmaHandler(const char *Namespace, 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandler *Handler) { 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *InsertNS = PragmaHandlers; 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is specified to be in a namespace, step down into it. 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Namespace) { 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If there is already a pragma handler with the name of this namespace, 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we either have an error (directive with the same name as a namespace) or 4385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // we already have the namespace to insert into. 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID)) { 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = Existing->getIfNamespace(); 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma" 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer " handler with the same name!"); 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this namespace doesn't exist yet, create and insert the 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // handler for it. 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS = new PragmaNamespace(NSID); 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaHandlers->AddPragma(InsertNS); 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check to make sure we don't already have a pragma for this identifier. 4525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!InsertNS->FindHandler(Handler->getName()) && 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Pragma handler already exists for this identifier!"); 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer InsertNS->AddPragma(Handler); 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4574095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// RemovePragmaHandler - Remove the specific pragma handler from the 4584095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// preprocessor. If \arg Namespace is non-null, then it should be the 4594095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// namespace that \arg Handler was added to. It is an error to remove 4604095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar/// a handler that has not been registered. 4614095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbarvoid Preprocessor::RemovePragmaHandler(const char *Namespace, 4624095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Handler) { 4634095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaNamespace *NS = PragmaHandlers; 4641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4654095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is specified to be in a namespace, step down into it. 4664095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (Namespace) { 4674095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar IdentifierInfo *NSID = getIdentifierInfo(Namespace); 4684095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandler *Existing = PragmaHandlers->FindHandler(NSID); 4694095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(Existing && "Namespace containing handler does not exist!"); 4704095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4714095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS = Existing->getIfNamespace(); 4724095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar assert(NS && "Invalid namespace, registered as a regular pragma handler!"); 4734095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar } 4744095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4754095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar NS->RemovePragmaHandler(Handler); 4761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4774095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // If this is a non-default namespace and it is now empty, remove 4784095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar // it. 4794095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar if (NS != PragmaHandlers && NS->IsEmpty()) 4804095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar PragmaHandlers->RemovePragmaHandler(NS); 4814095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar} 4824095080aff204008eefb26b100906c6ca2bc4bb6Daniel Dunbar 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace { 4842243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaOnceHandler - "#pragma once" marks the file as atomically included. 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaOnceHandler : public PragmaHandler { 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaOnceHandler(const IdentifierInfo *OnceID) : PragmaHandler(OnceID) {} 487d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &OnceTok) { 48835410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma once"); 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaOnce(OnceTok); 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4932243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaMarkHandler - "#pragma mark ..." is ignored by the compiler, and the 4942243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// rest of the line is not lexed. 4952243449253475574fc6f14986ff8f7fce5d46799Chris Lattnerstruct PragmaMarkHandler : public PragmaHandler { 4962243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PragmaMarkHandler(const IdentifierInfo *MarkID) : PragmaHandler(MarkID) {} 4972243449253475574fc6f14986ff8f7fce5d46799Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &MarkTok) { 4982243449253475574fc6f14986ff8f7fce5d46799Chris Lattner PP.HandlePragmaMark(); 4992243449253475574fc6f14986ff8f7fce5d46799Chris Lattner } 5002243449253475574fc6f14986ff8f7fce5d46799Chris Lattner}; 5012243449253475574fc6f14986ff8f7fce5d46799Chris Lattner 5022243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaPoisonHandler - "#pragma poison x" marks x as not usable. 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaPoisonHandler : public PragmaHandler { 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaPoisonHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 505d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &PoisonTok) { 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaPoison(PoisonTok); 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5102243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// PragmaSystemHeaderHandler - "#pragma system_header" marks the current file 5112243449253475574fc6f14986ff8f7fce5d46799Chris Lattner/// as a system header, which silences warnings in it. 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaSystemHeaderHandler : public PragmaHandler { 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaSystemHeaderHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 514d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &SHToken) { 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaSystemHeader(SHToken); 51635410d5cbbb18735d76e00496540d416dc49b577Chris Lattner PP.CheckEndOfDirective("pragma"); 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstruct PragmaDependencyHandler : public PragmaHandler { 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaDependencyHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 521d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DepToken) { 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.HandlePragmaDependency(DepToken); 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 5251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 526edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner/// PragmaDiagnosticHandler - e.g. '#pragma GCC diagnostic ignored "-Wformat"' 52704ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// Since clang's diagnostic supports extended functionality beyond GCC's 52804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// the constructor takes a clangMode flag to tell it whether or not to allow 52904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner/// clang's extended functionality, or whether to reject it. 530edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattnerstruct PragmaDiagnosticHandler : public PragmaHandler { 53104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattnerprivate: 53204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner const bool ClangMode; 53304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattnerpublic: 53404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PragmaDiagnosticHandler(const IdentifierInfo *ID, 53504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner const bool clangMode) : PragmaHandler(ID), 53604ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner ClangMode(clangMode) {} 537edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &DiagToken) { 538edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Token Tok; 539edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 540edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::identifier)) { 54104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid 54204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner : diag::warn_pragma_diagnostic_gcc_invalid; 54304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, Diag); 544edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 545edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 546edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 548edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::Mapping Map; 549edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (II->isStr("warning")) 550edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_WARNING; 551edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("error")) 552edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_ERROR; 553edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("ignored")) 554edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_IGNORE; 555edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner else if (II->isStr("fatal")) 556edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map = diag::MAP_FATAL; 55704ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner else if (ClangMode) { 55804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner if (II->isStr("pop")) { 5591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!PP.getDiagnostics().popMappings()) 56004ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_cannot_ppp); 56104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner return; 56204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } 56304ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 56404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner if (II->isStr("push")) { 56504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.getDiagnostics().pushMappings(); 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return; 56704ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } 56804ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 56904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_invalid); 57004ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner return; 57104ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner } else { 57204ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, diag::warn_pragma_diagnostic_gcc_invalid); 573edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 574edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 576edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 577edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner 578edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // We need at least one string. 579edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::string_literal)) { 580edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 581edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 582edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 5831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 584edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // String concatenation allows multiple strings, which can even come from 585edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // macro expansion. 586edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // "foo " "bar" "Baz" 587edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner llvm::SmallVector<Token, 4> StrToks; 588edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner while (Tok.is(tok::string_literal)) { 589edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner StrToks.push_back(Tok); 590edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.LexUnexpandedToken(Tok); 591edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 593edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Tok.isNot(tok::eom)) { 594edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); 595edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 596edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 598edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner // Concatenate and parse the strings. 599edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner StringLiteralParser Literal(&StrToks[0], StrToks.size(), PP); 600edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner assert(!Literal.AnyWide && "Didn't allow wide strings in"); 601edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Literal.hadError) 602edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 603edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (Literal.Pascal) { 60404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid 60504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner : diag::warn_pragma_diagnostic_gcc_invalid; 60604ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner PP.Diag(Tok, Diag); 607edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 608edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 60904ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner 610edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner std::string WarningName(Literal.GetString(), 611edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Literal.GetString()+Literal.GetStringLength()); 612edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner 613edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (WarningName.size() < 3 || WarningName[0] != '-' || 614edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner WarningName[1] != 'W') { 615edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(StrToks[0].getLocation(), 616edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::warn_pragma_diagnostic_invalid_option); 617edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner return; 618edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 6191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 620edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.c_str()+2, 621edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner Map)) 622edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner PP.Diag(StrToks[0].getLocation(), 623edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner diag::warn_pragma_diagnostic_unknown_warning) << WarningName; 624edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner } 625edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner}; 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 627636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner/// PragmaCommentHandler - "#pragma comment ...". 628636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattnerstruct PragmaCommentHandler : public PragmaHandler { 629636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PragmaCommentHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 630636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &CommentTok) { 631636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner PP.HandlePragmaComment(CommentTok); 632636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner } 633636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner}; 6341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 635062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner// Pragma STDC implementations. 6366c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 6376c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattnerenum STDCSetting { 6386c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner STDC_ON, STDC_OFF, STDC_DEFAULT, STDC_INVALID 6396c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner}; 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6416c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattnerstatic STDCSetting LexOnOffSwitch(Preprocessor &PP) { 6426c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Token Tok; 6436c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.LexUnexpandedToken(Tok); 6446c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 6456c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (Tok.isNot(tok::identifier)) { 6466c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax); 6476c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return STDC_INVALID; 6486c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner } 6496c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 6506c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner STDCSetting Result; 6516c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (II->isStr("ON")) 6526c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_ON; 6536c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else if (II->isStr("OFF")) 6546c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_OFF; 6556c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else if (II->isStr("DEFAULT")) 6566c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner Result = STDC_DEFAULT; 6576c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner else { 6586c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax); 6596c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return STDC_INVALID; 6606c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner } 6616c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner 6626c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // Verify that this is followed by EOM. 6636c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.LexUnexpandedToken(Tok); 6646c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner if (Tok.isNot(tok::eom)) 6656c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner PP.Diag(Tok, diag::ext_stdc_pragma_syntax_eom); 6666c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner return Result; 6676c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner} 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 669062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FP_CONTRACTHandler - "#pragma STDC FP_CONTRACT ...". 670062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FP_CONTRACTHandler : public PragmaHandler { 671062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_FP_CONTRACTHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 672f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 6736c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // We just ignore the setting of FP_CONTRACT. Since we don't do contractions 6746c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // at all, our default is OFF and setting it to ON is an optimization hint 6756c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // we can safely ignore. When we support -ffma or something, we would need 6766c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // to diagnose that we are ignoring FMA. 6776c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner LexOnOffSwitch(PP); 678062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 679062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 681062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_FENV_ACCESSHandler - "#pragma STDC FENV_ACCESS ...". 682062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler { 683062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_FENV_ACCESSHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {} 684f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 6854d8aac3778b40c161bed9964125948ee01c08821Chris Lattner if (LexOnOffSwitch(PP) == STDC_ON) 6864d8aac3778b40c161bed9964125948ee01c08821Chris Lattner PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported); 687062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 688062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 690062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_CX_LIMITED_RANGEHandler - "#pragma STDC CX_LIMITED_RANGE ...". 691062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler { 692062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_CX_LIMITED_RANGEHandler(const IdentifierInfo *ID) 693062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner : PragmaHandler(ID) {} 694f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &Tok) { 6956c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner LexOnOffSwitch(PP); 696062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 697062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 6981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 699062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner/// PragmaSTDC_UnknownHandler - "#pragma STDC ...". 700062f23246510393c19b537b68ec88b6a08ee8996Chris Lattnerstruct PragmaSTDC_UnknownHandler : public PragmaHandler { 701062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner PragmaSTDC_UnknownHandler() : PragmaHandler(0) {} 702f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner virtual void HandlePragma(Preprocessor &PP, Token &UnknownTok) { 7036c5cf4a2e234923ab66127de0874a71cb6bfdd83Chris Lattner // C99 6.10.6p2, unknown forms are not allowed. 704f545be5552b6fd40a4c766fbf82dab0ab5305790Chris Lattner PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored); 705062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner } 706062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner}; 7071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end anonymous namespace 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// #pragma GCC poison/system_header/dependency and #pragma once. 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Preprocessor::RegisterBuiltinPragmas() { 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once"))); 7152243449253475574fc6f14986ff8f7fce5d46799Chris Lattner AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark"))); 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 717e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner // #pragma GCC ... 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison"))); 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaSystemHeaderHandler( 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("system_header"))); 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AddPragmaHandler("GCC", new PragmaDependencyHandler( 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer getIdentifierInfo("dependency"))); 723edaf877d2469147ba818187a3e57a00b3f73b123Chris Lattner AddPragmaHandler("GCC", new PragmaDiagnosticHandler( 72404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner getIdentifierInfo("diagnostic"), 72504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner false)); 726e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner // #pragma clang ... 727e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner AddPragmaHandler("clang", new PragmaPoisonHandler( 728e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner getIdentifierInfo("poison"))); 729e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner AddPragmaHandler("clang", new PragmaSystemHeaderHandler( 730e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner getIdentifierInfo("system_header"))); 731e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner AddPragmaHandler("clang", new PragmaDependencyHandler( 732e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner getIdentifierInfo("dependency"))); 733e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner AddPragmaHandler("clang", new PragmaDiagnosticHandler( 73404ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner getIdentifierInfo("diagnostic"), 73504ae2df026b275aae5dddfc0db5ca55ff4e62179Chris Lattner true)); 736e8fa06e07363b6d5e6c371bbd454d51bab78d01dChris Lattner 737062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_FP_CONTRACTHandler( 738062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("FP_CONTRACT"))); 739062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler( 740062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("FENV_ACCESS"))); 741062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler( 742062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner getIdentifierInfo("CX_LIMITED_RANGE"))); 743062f23246510393c19b537b68ec88b6a08ee8996Chris Lattner AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler()); 7441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 745636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner // MS extensions. 746636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner if (Features.Microsoft) 747636c5ef6572e899d36cec1b0023fb28ba65189e1Chris Lattner AddPragmaHandler(0, new PragmaCommentHandler(getIdentifierInfo("comment"))); 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 749