forked from OSchip/llvm-project
1313 lines
43 KiB
C++
1313 lines
43 KiB
C++
//===--- Pragma.cpp - Pragma registration and handling --------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PragmaHandler/PragmaTable interfaces and implements
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// pragma related methods of the Preprocessor class.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Lex/Pragma.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/LiteralSupport.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Lex/MacroInfo.h"
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#include "clang/Lex/LexDiagnostic.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/Support/CrashRecoveryContext.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <algorithm>
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using namespace clang;
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// Out-of-line destructor to provide a home for the class.
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PragmaHandler::~PragmaHandler() {
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}
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//===----------------------------------------------------------------------===//
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// EmptyPragmaHandler Implementation.
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//===----------------------------------------------------------------------===//
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EmptyPragmaHandler::EmptyPragmaHandler() {}
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void EmptyPragmaHandler::HandlePragma(Preprocessor &PP,
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PragmaIntroducerKind Introducer,
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Token &FirstToken) {}
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//===----------------------------------------------------------------------===//
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// PragmaNamespace Implementation.
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//===----------------------------------------------------------------------===//
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PragmaNamespace::~PragmaNamespace() {
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for (llvm::StringMap<PragmaHandler*>::iterator
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I = Handlers.begin(), E = Handlers.end(); I != E; ++I)
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delete I->second;
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}
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/// FindHandler - Check to see if there is already a handler for the
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/// specified name. If not, return the handler for the null identifier if it
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/// exists, otherwise return null. If IgnoreNull is true (the default) then
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/// the null handler isn't returned on failure to match.
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PragmaHandler *PragmaNamespace::FindHandler(StringRef Name,
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bool IgnoreNull) const {
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if (PragmaHandler *Handler = Handlers.lookup(Name))
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return Handler;
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return IgnoreNull ? 0 : Handlers.lookup(StringRef());
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}
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void PragmaNamespace::AddPragma(PragmaHandler *Handler) {
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assert(!Handlers.lookup(Handler->getName()) &&
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"A handler with this name is already registered in this namespace");
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llvm::StringMapEntry<PragmaHandler *> &Entry =
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Handlers.GetOrCreateValue(Handler->getName());
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Entry.setValue(Handler);
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}
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void PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) {
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assert(Handlers.lookup(Handler->getName()) &&
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"Handler not registered in this namespace");
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Handlers.erase(Handler->getName());
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}
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void PragmaNamespace::HandlePragma(Preprocessor &PP,
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PragmaIntroducerKind Introducer,
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Token &Tok) {
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// Read the 'namespace' that the directive is in, e.g. STDC. Do not macro
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// expand it, the user can have a STDC #define, that should not affect this.
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PP.LexUnexpandedToken(Tok);
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// Get the handler for this token. If there is no handler, ignore the pragma.
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PragmaHandler *Handler
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= FindHandler(Tok.getIdentifierInfo() ? Tok.getIdentifierInfo()->getName()
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: StringRef(),
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/*IgnoreNull=*/false);
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if (Handler == 0) {
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PP.Diag(Tok, diag::warn_pragma_ignored);
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return;
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}
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// Otherwise, pass it down.
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Handler->HandlePragma(PP, Introducer, Tok);
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}
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//===----------------------------------------------------------------------===//
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// Preprocessor Pragma Directive Handling.
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//===----------------------------------------------------------------------===//
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/// HandlePragmaDirective - The "\#pragma" directive has been parsed. Lex the
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/// rest of the pragma, passing it to the registered pragma handlers.
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void Preprocessor::HandlePragmaDirective(unsigned Introducer) {
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if (!PragmasEnabled)
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return;
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++NumPragma;
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// Invoke the first level of pragma handlers which reads the namespace id.
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Token Tok;
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PragmaHandlers->HandlePragma(*this, PragmaIntroducerKind(Introducer), Tok);
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// If the pragma handler didn't read the rest of the line, consume it now.
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if ((CurTokenLexer && CurTokenLexer->isParsingPreprocessorDirective())
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|| (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective))
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DiscardUntilEndOfDirective();
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}
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namespace {
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/// \brief Helper class for \see Preprocessor::Handle_Pragma.
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class LexingFor_PragmaRAII {
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Preprocessor &PP;
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bool InMacroArgPreExpansion;
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bool Failed;
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Token &OutTok;
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Token PragmaTok;
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public:
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LexingFor_PragmaRAII(Preprocessor &PP, bool InMacroArgPreExpansion,
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Token &Tok)
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: PP(PP), InMacroArgPreExpansion(InMacroArgPreExpansion),
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Failed(false), OutTok(Tok) {
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if (InMacroArgPreExpansion) {
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PragmaTok = OutTok;
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PP.EnableBacktrackAtThisPos();
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}
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}
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~LexingFor_PragmaRAII() {
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if (InMacroArgPreExpansion) {
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if (Failed) {
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PP.CommitBacktrackedTokens();
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} else {
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PP.Backtrack();
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OutTok = PragmaTok;
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}
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}
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}
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void failed() {
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Failed = true;
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}
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};
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}
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/// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then
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/// return the first token after the directive. The _Pragma token has just
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/// been read into 'Tok'.
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void Preprocessor::Handle_Pragma(Token &Tok) {
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// This works differently if we are pre-expanding a macro argument.
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// In that case we don't actually "activate" the pragma now, we only lex it
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// until we are sure it is lexically correct and then we backtrack so that
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// we activate the pragma whenever we encounter the tokens again in the token
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// stream. This ensures that we will activate it in the correct location
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// or that we will ignore it if it never enters the token stream, e.g:
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//
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// #define EMPTY(x)
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// #define INACTIVE(x) EMPTY(x)
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// INACTIVE(_Pragma("clang diagnostic ignored \"-Wconversion\""))
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LexingFor_PragmaRAII _PragmaLexing(*this, InMacroArgPreExpansion, Tok);
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// Remember the pragma token location.
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SourceLocation PragmaLoc = Tok.getLocation();
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// Read the '('.
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Lex(Tok);
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if (Tok.isNot(tok::l_paren)) {
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Diag(PragmaLoc, diag::err__Pragma_malformed);
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return _PragmaLexing.failed();
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}
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// Read the '"..."'.
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Lex(Tok);
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if (Tok.isNot(tok::string_literal) && Tok.isNot(tok::wide_string_literal)) {
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Diag(PragmaLoc, diag::err__Pragma_malformed);
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// Skip this token, and the ')', if present.
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if (Tok.isNot(tok::r_paren))
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Lex(Tok);
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if (Tok.is(tok::r_paren))
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Lex(Tok);
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return _PragmaLexing.failed();
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}
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if (Tok.hasUDSuffix()) {
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Diag(Tok, diag::err_invalid_string_udl);
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// Skip this token, and the ')', if present.
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Lex(Tok);
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if (Tok.is(tok::r_paren))
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Lex(Tok);
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return _PragmaLexing.failed();
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}
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// Remember the string.
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Token StrTok = Tok;
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// Read the ')'.
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Lex(Tok);
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if (Tok.isNot(tok::r_paren)) {
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Diag(PragmaLoc, diag::err__Pragma_malformed);
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return _PragmaLexing.failed();
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}
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if (InMacroArgPreExpansion)
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return;
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SourceLocation RParenLoc = Tok.getLocation();
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std::string StrVal = getSpelling(StrTok);
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// The _Pragma is lexically sound. Destringize according to C99 6.10.9.1:
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// "The string literal is destringized by deleting the L prefix, if present,
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// deleting the leading and trailing double-quotes, replacing each escape
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// sequence \" by a double-quote, and replacing each escape sequence \\ by a
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// single backslash."
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if (StrVal[0] == 'L') // Remove L prefix.
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StrVal.erase(StrVal.begin());
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assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
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"Invalid string token!");
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// Remove the front quote, replacing it with a space, so that the pragma
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// contents appear to have a space before them.
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StrVal[0] = ' ';
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// Replace the terminating quote with a \n.
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StrVal[StrVal.size()-1] = '\n';
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// Remove escaped quotes and escapes.
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for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) {
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if (StrVal[i] == '\\' &&
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(StrVal[i+1] == '\\' || StrVal[i+1] == '"')) {
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// \\ -> '\' and \" -> '"'.
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StrVal.erase(StrVal.begin()+i);
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--e;
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}
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}
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// Plop the string (including the newline and trailing null) into a buffer
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// where we can lex it.
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Token TmpTok;
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TmpTok.startToken();
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CreateString(&StrVal[0], StrVal.size(), TmpTok);
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SourceLocation TokLoc = TmpTok.getLocation();
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// Make and enter a lexer object so that we lex and expand the tokens just
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// like any others.
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Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc,
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StrVal.size(), *this);
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EnterSourceFileWithLexer(TL, 0);
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// With everything set up, lex this as a #pragma directive.
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HandlePragmaDirective(PIK__Pragma);
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// Finally, return whatever came after the pragma directive.
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return Lex(Tok);
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}
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/// HandleMicrosoft__pragma - Like Handle_Pragma except the pragma text
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/// is not enclosed within a string literal.
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void Preprocessor::HandleMicrosoft__pragma(Token &Tok) {
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// Remember the pragma token location.
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SourceLocation PragmaLoc = Tok.getLocation();
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// Read the '('.
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Lex(Tok);
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if (Tok.isNot(tok::l_paren)) {
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Diag(PragmaLoc, diag::err__Pragma_malformed);
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return;
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}
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// Get the tokens enclosed within the __pragma(), as well as the final ')'.
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SmallVector<Token, 32> PragmaToks;
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int NumParens = 0;
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Lex(Tok);
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while (Tok.isNot(tok::eof)) {
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PragmaToks.push_back(Tok);
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if (Tok.is(tok::l_paren))
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NumParens++;
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else if (Tok.is(tok::r_paren) && NumParens-- == 0)
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break;
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Lex(Tok);
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}
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if (Tok.is(tok::eof)) {
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Diag(PragmaLoc, diag::err_unterminated___pragma);
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return;
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}
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PragmaToks.front().setFlag(Token::LeadingSpace);
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// Replace the ')' with an EOD to mark the end of the pragma.
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PragmaToks.back().setKind(tok::eod);
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Token *TokArray = new Token[PragmaToks.size()];
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std::copy(PragmaToks.begin(), PragmaToks.end(), TokArray);
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// Push the tokens onto the stack.
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EnterTokenStream(TokArray, PragmaToks.size(), true, true);
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// With everything set up, lex this as a #pragma directive.
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HandlePragmaDirective(PIK___pragma);
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// Finally, return whatever came after the pragma directive.
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return Lex(Tok);
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}
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/// HandlePragmaOnce - Handle \#pragma once. OnceTok is the 'once'.
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///
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void Preprocessor::HandlePragmaOnce(Token &OnceTok) {
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if (isInPrimaryFile()) {
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Diag(OnceTok, diag::pp_pragma_once_in_main_file);
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return;
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}
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// Get the current file lexer we're looking at. Ignore _Pragma 'files' etc.
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// Mark the file as a once-only file now.
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HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry());
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}
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void Preprocessor::HandlePragmaMark() {
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assert(CurPPLexer && "No current lexer?");
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if (CurLexer)
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CurLexer->ReadToEndOfLine();
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else
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CurPTHLexer->DiscardToEndOfLine();
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}
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/// HandlePragmaPoison - Handle \#pragma GCC poison. PoisonTok is the 'poison'.
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///
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void Preprocessor::HandlePragmaPoison(Token &PoisonTok) {
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Token Tok;
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while (1) {
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// Read the next token to poison. While doing this, pretend that we are
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// skipping while reading the identifier to poison.
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// This avoids errors on code like:
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// #pragma GCC poison X
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// #pragma GCC poison X
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if (CurPPLexer) CurPPLexer->LexingRawMode = true;
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LexUnexpandedToken(Tok);
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if (CurPPLexer) CurPPLexer->LexingRawMode = false;
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// If we reached the end of line, we're done.
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if (Tok.is(tok::eod)) return;
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// Can only poison identifiers.
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if (Tok.isNot(tok::raw_identifier)) {
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Diag(Tok, diag::err_pp_invalid_poison);
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return;
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}
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// Look up the identifier info for the token. We disabled identifier lookup
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// by saying we're skipping contents, so we need to do this manually.
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IdentifierInfo *II = LookUpIdentifierInfo(Tok);
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// Already poisoned.
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if (II->isPoisoned()) continue;
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// If this is a macro identifier, emit a warning.
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if (II->hasMacroDefinition())
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Diag(Tok, diag::pp_poisoning_existing_macro);
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// Finally, poison it!
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II->setIsPoisoned();
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if (II->isFromAST())
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II->setChangedSinceDeserialization();
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}
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}
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/// HandlePragmaSystemHeader - Implement \#pragma GCC system_header. We know
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/// that the whole directive has been parsed.
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void Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) {
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if (isInPrimaryFile()) {
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Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file);
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return;
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}
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// Get the current file lexer we're looking at. Ignore _Pragma 'files' etc.
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PreprocessorLexer *TheLexer = getCurrentFileLexer();
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// Mark the file as a system header.
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HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry());
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PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation());
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if (PLoc.isInvalid())
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return;
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unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename());
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// Notify the client, if desired, that we are in a new source file.
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if (Callbacks)
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Callbacks->FileChanged(SysHeaderTok.getLocation(),
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PPCallbacks::SystemHeaderPragma, SrcMgr::C_System);
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// Emit a line marker. This will change any source locations from this point
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// forward to realize they are in a system header.
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// Create a line note with this information.
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SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine(), FilenameID,
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false, false, true, false);
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}
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/// HandlePragmaDependency - Handle \#pragma GCC dependency "foo" blah.
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///
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void Preprocessor::HandlePragmaDependency(Token &DependencyTok) {
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Token FilenameTok;
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CurPPLexer->LexIncludeFilename(FilenameTok);
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// If the token kind is EOD, the error has already been diagnosed.
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if (FilenameTok.is(tok::eod))
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return;
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// Reserve a buffer to get the spelling.
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SmallString<128> FilenameBuffer;
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bool Invalid = false;
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StringRef Filename = getSpelling(FilenameTok, FilenameBuffer, &Invalid);
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if (Invalid)
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return;
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bool isAngled =
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GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename);
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// If GetIncludeFilenameSpelling set the start ptr to null, there was an
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// error.
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if (Filename.empty())
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return;
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// Search include directories for this file.
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const DirectoryLookup *CurDir;
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const FileEntry *File = LookupFile(Filename, isAngled, 0, CurDir, NULL, NULL,
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NULL);
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if (File == 0) {
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if (!SuppressIncludeNotFoundError)
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Diag(FilenameTok, diag::err_pp_file_not_found) << Filename;
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return;
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}
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const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry();
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// If this file is older than the file it depends on, emit a diagnostic.
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if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) {
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// Lex tokens at the end of the message and include them in the message.
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std::string Message;
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Lex(DependencyTok);
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while (DependencyTok.isNot(tok::eod)) {
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Message += getSpelling(DependencyTok) + " ";
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Lex(DependencyTok);
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}
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// Remove the trailing ' ' if present.
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if (!Message.empty())
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Message.erase(Message.end()-1);
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Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message;
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}
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}
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/// \brief Handle the microsoft \#pragma comment extension.
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///
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/// The syntax is:
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/// \code
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/// \#pragma comment(linker, "foo")
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/// \endcode
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/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user.
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/// "foo" is a string, which is fully macro expanded, and permits string
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/// concatenation, embedded escape characters etc. See MSDN for more details.
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void Preprocessor::HandlePragmaComment(Token &Tok) {
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SourceLocation CommentLoc = Tok.getLocation();
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Lex(Tok);
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if (Tok.isNot(tok::l_paren)) {
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Diag(CommentLoc, diag::err_pragma_comment_malformed);
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return;
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}
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// Read the identifier.
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Lex(Tok);
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if (Tok.isNot(tok::identifier)) {
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Diag(CommentLoc, diag::err_pragma_comment_malformed);
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return;
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}
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// Verify that this is one of the 5 whitelisted options.
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// FIXME: warn that 'exestr' is deprecated.
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const IdentifierInfo *II = Tok.getIdentifierInfo();
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if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") &&
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!II->isStr("linker") && !II->isStr("user")) {
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Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind);
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return;
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}
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// Read the optional string if present.
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Lex(Tok);
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std::string ArgumentString;
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if (Tok.is(tok::comma)) {
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Lex(Tok); // eat the comma.
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|
|
// We need at least one string.
|
|
if (Tok.isNot(tok::string_literal)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
|
|
return;
|
|
}
|
|
|
|
// String concatenation allows multiple strings, which can even come from
|
|
// macro expansion.
|
|
// "foo " "bar" "Baz"
|
|
SmallVector<Token, 4> StrToks;
|
|
while (Tok.is(tok::string_literal)) {
|
|
if (Tok.hasUDSuffix())
|
|
Diag(Tok, diag::err_invalid_string_udl);
|
|
StrToks.push_back(Tok);
|
|
Lex(Tok);
|
|
}
|
|
|
|
// Concatenate and parse the strings.
|
|
StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this);
|
|
assert(Literal.isAscii() && "Didn't allow wide strings in");
|
|
if (Literal.hadError)
|
|
return;
|
|
if (Literal.Pascal) {
|
|
Diag(StrToks[0].getLocation(), diag::err_pragma_comment_malformed);
|
|
return;
|
|
}
|
|
|
|
ArgumentString = Literal.GetString();
|
|
}
|
|
|
|
// FIXME: If the kind is "compiler" warn if the string is present (it is
|
|
// ignored).
|
|
// FIXME: 'lib' requires a comment string.
|
|
// FIXME: 'linker' requires a comment string, and has a specific list of
|
|
// things that are allowable.
|
|
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
|
|
return;
|
|
}
|
|
Lex(Tok); // eat the r_paren.
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
|
|
return;
|
|
}
|
|
|
|
// If the pragma is lexically sound, notify any interested PPCallbacks.
|
|
if (Callbacks)
|
|
Callbacks->PragmaComment(CommentLoc, II, ArgumentString);
|
|
}
|
|
|
|
/// HandlePragmaMessage - Handle the microsoft and gcc \#pragma message
|
|
/// extension. The syntax is:
|
|
/// \code
|
|
/// \#pragma message(string)
|
|
/// \endcode
|
|
/// OR, in GCC mode:
|
|
/// \code
|
|
/// \#pragma message string
|
|
/// \endcode
|
|
/// string is a string, which is fully macro expanded, and permits string
|
|
/// concatenation, embedded escape characters, etc... See MSDN for more details.
|
|
void Preprocessor::HandlePragmaMessage(Token &Tok) {
|
|
SourceLocation MessageLoc = Tok.getLocation();
|
|
Lex(Tok);
|
|
bool ExpectClosingParen = false;
|
|
switch (Tok.getKind()) {
|
|
case tok::l_paren:
|
|
// We have a MSVC style pragma message.
|
|
ExpectClosingParen = true;
|
|
// Read the string.
|
|
Lex(Tok);
|
|
break;
|
|
case tok::string_literal:
|
|
// We have a GCC style pragma message, and we just read the string.
|
|
break;
|
|
default:
|
|
Diag(MessageLoc, diag::err_pragma_message_malformed);
|
|
return;
|
|
}
|
|
|
|
// We need at least one string.
|
|
if (Tok.isNot(tok::string_literal)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_message_malformed);
|
|
return;
|
|
}
|
|
|
|
// String concatenation allows multiple strings, which can even come from
|
|
// macro expansion.
|
|
// "foo " "bar" "Baz"
|
|
SmallVector<Token, 4> StrToks;
|
|
while (Tok.is(tok::string_literal)) {
|
|
if (Tok.hasUDSuffix())
|
|
Diag(Tok, diag::err_invalid_string_udl);
|
|
StrToks.push_back(Tok);
|
|
Lex(Tok);
|
|
}
|
|
|
|
// Concatenate and parse the strings.
|
|
StringLiteralParser Literal(&StrToks[0], StrToks.size(), *this);
|
|
assert(Literal.isAscii() && "Didn't allow wide strings in");
|
|
if (Literal.hadError)
|
|
return;
|
|
if (Literal.Pascal) {
|
|
Diag(StrToks[0].getLocation(), diag::err_pragma_message_malformed);
|
|
return;
|
|
}
|
|
|
|
StringRef MessageString(Literal.GetString());
|
|
|
|
if (ExpectClosingParen) {
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_message_malformed);
|
|
return;
|
|
}
|
|
Lex(Tok); // eat the r_paren.
|
|
}
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_message_malformed);
|
|
return;
|
|
}
|
|
|
|
// Output the message.
|
|
Diag(MessageLoc, diag::warn_pragma_message) << MessageString;
|
|
|
|
// If the pragma is lexically sound, notify any interested PPCallbacks.
|
|
if (Callbacks)
|
|
Callbacks->PragmaMessage(MessageLoc, MessageString);
|
|
}
|
|
|
|
/// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro.
|
|
/// Return the IdentifierInfo* associated with the macro to push or pop.
|
|
IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) {
|
|
// Remember the pragma token location.
|
|
Token PragmaTok = Tok;
|
|
|
|
// Read the '('.
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed)
|
|
<< getSpelling(PragmaTok);
|
|
return 0;
|
|
}
|
|
|
|
// Read the macro name string.
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::string_literal)) {
|
|
Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed)
|
|
<< getSpelling(PragmaTok);
|
|
return 0;
|
|
}
|
|
|
|
if (Tok.hasUDSuffix()) {
|
|
Diag(Tok, diag::err_invalid_string_udl);
|
|
return 0;
|
|
}
|
|
|
|
// Remember the macro string.
|
|
std::string StrVal = getSpelling(Tok);
|
|
|
|
// Read the ')'.
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed)
|
|
<< getSpelling(PragmaTok);
|
|
return 0;
|
|
}
|
|
|
|
assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
|
|
"Invalid string token!");
|
|
|
|
// Create a Token from the string.
|
|
Token MacroTok;
|
|
MacroTok.startToken();
|
|
MacroTok.setKind(tok::raw_identifier);
|
|
CreateString(&StrVal[1], StrVal.size() - 2, MacroTok);
|
|
|
|
// Get the IdentifierInfo of MacroToPushTok.
|
|
return LookUpIdentifierInfo(MacroTok);
|
|
}
|
|
|
|
/// \brief Handle \#pragma push_macro.
|
|
///
|
|
/// The syntax is:
|
|
/// \code
|
|
/// \#pragma push_macro("macro")
|
|
/// \endcode
|
|
void Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) {
|
|
// Parse the pragma directive and get the macro IdentifierInfo*.
|
|
IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok);
|
|
if (!IdentInfo) return;
|
|
|
|
// Get the MacroInfo associated with IdentInfo.
|
|
MacroInfo *MI = getMacroInfo(IdentInfo);
|
|
|
|
MacroInfo *MacroCopyToPush = 0;
|
|
if (MI) {
|
|
// Make a clone of MI.
|
|
MacroCopyToPush = CloneMacroInfo(*MI);
|
|
|
|
// Allow the original MacroInfo to be redefined later.
|
|
MI->setIsAllowRedefinitionsWithoutWarning(true);
|
|
}
|
|
|
|
// Push the cloned MacroInfo so we can retrieve it later.
|
|
PragmaPushMacroInfo[IdentInfo].push_back(MacroCopyToPush);
|
|
}
|
|
|
|
/// \brief Handle \#pragma pop_macro.
|
|
///
|
|
/// The syntax is:
|
|
/// \code
|
|
/// #pragma pop_macro("macro")
|
|
/// \endcode
|
|
void Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) {
|
|
SourceLocation MessageLoc = PopMacroTok.getLocation();
|
|
|
|
// Parse the pragma directive and get the macro IdentifierInfo*.
|
|
IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok);
|
|
if (!IdentInfo) return;
|
|
|
|
// Find the vector<MacroInfo*> associated with the macro.
|
|
llvm::DenseMap<IdentifierInfo*, std::vector<MacroInfo*> >::iterator iter =
|
|
PragmaPushMacroInfo.find(IdentInfo);
|
|
if (iter != PragmaPushMacroInfo.end()) {
|
|
// Release the MacroInfo currently associated with IdentInfo.
|
|
MacroInfo *CurrentMI = getMacroInfo(IdentInfo);
|
|
if (CurrentMI) {
|
|
if (CurrentMI->isWarnIfUnused())
|
|
WarnUnusedMacroLocs.erase(CurrentMI->getDefinitionLoc());
|
|
ReleaseMacroInfo(CurrentMI);
|
|
}
|
|
|
|
// Get the MacroInfo we want to reinstall.
|
|
MacroInfo *MacroToReInstall = iter->second.back();
|
|
|
|
// Reinstall the previously pushed macro.
|
|
setMacroInfo(IdentInfo, MacroToReInstall);
|
|
|
|
// Pop PragmaPushMacroInfo stack.
|
|
iter->second.pop_back();
|
|
if (iter->second.size() == 0)
|
|
PragmaPushMacroInfo.erase(iter);
|
|
} else {
|
|
Diag(MessageLoc, diag::warn_pragma_pop_macro_no_push)
|
|
<< IdentInfo->getName();
|
|
}
|
|
}
|
|
|
|
void Preprocessor::HandlePragmaIncludeAlias(Token &Tok) {
|
|
// We will either get a quoted filename or a bracketed filename, and we
|
|
// have to track which we got. The first filename is the source name,
|
|
// and the second name is the mapped filename. If the first is quoted,
|
|
// the second must be as well (cannot mix and match quotes and brackets).
|
|
|
|
// Get the open paren
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
Diag(Tok, diag::warn_pragma_include_alias_expected) << "(";
|
|
return;
|
|
}
|
|
|
|
// We expect either a quoted string literal, or a bracketed name
|
|
Token SourceFilenameTok;
|
|
CurPPLexer->LexIncludeFilename(SourceFilenameTok);
|
|
if (SourceFilenameTok.is(tok::eod)) {
|
|
// The diagnostic has already been handled
|
|
return;
|
|
}
|
|
|
|
StringRef SourceFileName;
|
|
SmallString<128> FileNameBuffer;
|
|
if (SourceFilenameTok.is(tok::string_literal) ||
|
|
SourceFilenameTok.is(tok::angle_string_literal)) {
|
|
SourceFileName = getSpelling(SourceFilenameTok, FileNameBuffer);
|
|
} else if (SourceFilenameTok.is(tok::less)) {
|
|
// This could be a path instead of just a name
|
|
FileNameBuffer.push_back('<');
|
|
SourceLocation End;
|
|
if (ConcatenateIncludeName(FileNameBuffer, End))
|
|
return; // Diagnostic already emitted
|
|
SourceFileName = FileNameBuffer.str();
|
|
} else {
|
|
Diag(Tok, diag::warn_pragma_include_alias_expected_filename);
|
|
return;
|
|
}
|
|
FileNameBuffer.clear();
|
|
|
|
// Now we expect a comma, followed by another include name
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::comma)) {
|
|
Diag(Tok, diag::warn_pragma_include_alias_expected) << ",";
|
|
return;
|
|
}
|
|
|
|
Token ReplaceFilenameTok;
|
|
CurPPLexer->LexIncludeFilename(ReplaceFilenameTok);
|
|
if (ReplaceFilenameTok.is(tok::eod)) {
|
|
// The diagnostic has already been handled
|
|
return;
|
|
}
|
|
|
|
StringRef ReplaceFileName;
|
|
if (ReplaceFilenameTok.is(tok::string_literal) ||
|
|
ReplaceFilenameTok.is(tok::angle_string_literal)) {
|
|
ReplaceFileName = getSpelling(ReplaceFilenameTok, FileNameBuffer);
|
|
} else if (ReplaceFilenameTok.is(tok::less)) {
|
|
// This could be a path instead of just a name
|
|
FileNameBuffer.push_back('<');
|
|
SourceLocation End;
|
|
if (ConcatenateIncludeName(FileNameBuffer, End))
|
|
return; // Diagnostic already emitted
|
|
ReplaceFileName = FileNameBuffer.str();
|
|
} else {
|
|
Diag(Tok, diag::warn_pragma_include_alias_expected_filename);
|
|
return;
|
|
}
|
|
|
|
// Finally, we expect the closing paren
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::warn_pragma_include_alias_expected) << ")";
|
|
return;
|
|
}
|
|
|
|
// Now that we have the source and target filenames, we need to make sure
|
|
// they're both of the same type (angled vs non-angled)
|
|
StringRef OriginalSource = SourceFileName;
|
|
|
|
bool SourceIsAngled =
|
|
GetIncludeFilenameSpelling(SourceFilenameTok.getLocation(),
|
|
SourceFileName);
|
|
bool ReplaceIsAngled =
|
|
GetIncludeFilenameSpelling(ReplaceFilenameTok.getLocation(),
|
|
ReplaceFileName);
|
|
if (!SourceFileName.empty() && !ReplaceFileName.empty() &&
|
|
(SourceIsAngled != ReplaceIsAngled)) {
|
|
unsigned int DiagID;
|
|
if (SourceIsAngled)
|
|
DiagID = diag::warn_pragma_include_alias_mismatch_angle;
|
|
else
|
|
DiagID = diag::warn_pragma_include_alias_mismatch_quote;
|
|
|
|
Diag(SourceFilenameTok.getLocation(), DiagID)
|
|
<< SourceFileName
|
|
<< ReplaceFileName;
|
|
|
|
return;
|
|
}
|
|
|
|
// Now we can let the include handler know about this mapping
|
|
getHeaderSearchInfo().AddIncludeAlias(OriginalSource, ReplaceFileName);
|
|
}
|
|
|
|
/// AddPragmaHandler - Add the specified pragma handler to the preprocessor.
|
|
/// If 'Namespace' is non-null, then it is a token required to exist on the
|
|
/// pragma line before the pragma string starts, e.g. "STDC" or "GCC".
|
|
void Preprocessor::AddPragmaHandler(StringRef Namespace,
|
|
PragmaHandler *Handler) {
|
|
PragmaNamespace *InsertNS = PragmaHandlers;
|
|
|
|
// If this is specified to be in a namespace, step down into it.
|
|
if (!Namespace.empty()) {
|
|
// If there is already a pragma handler with the name of this namespace,
|
|
// we either have an error (directive with the same name as a namespace) or
|
|
// we already have the namespace to insert into.
|
|
if (PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace)) {
|
|
InsertNS = Existing->getIfNamespace();
|
|
assert(InsertNS != 0 && "Cannot have a pragma namespace and pragma"
|
|
" handler with the same name!");
|
|
} else {
|
|
// Otherwise, this namespace doesn't exist yet, create and insert the
|
|
// handler for it.
|
|
InsertNS = new PragmaNamespace(Namespace);
|
|
PragmaHandlers->AddPragma(InsertNS);
|
|
}
|
|
}
|
|
|
|
// Check to make sure we don't already have a pragma for this identifier.
|
|
assert(!InsertNS->FindHandler(Handler->getName()) &&
|
|
"Pragma handler already exists for this identifier!");
|
|
InsertNS->AddPragma(Handler);
|
|
}
|
|
|
|
/// RemovePragmaHandler - Remove the specific pragma handler from the
|
|
/// preprocessor. If \arg Namespace is non-null, then it should be the
|
|
/// namespace that \arg Handler was added to. It is an error to remove
|
|
/// a handler that has not been registered.
|
|
void Preprocessor::RemovePragmaHandler(StringRef Namespace,
|
|
PragmaHandler *Handler) {
|
|
PragmaNamespace *NS = PragmaHandlers;
|
|
|
|
// If this is specified to be in a namespace, step down into it.
|
|
if (!Namespace.empty()) {
|
|
PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace);
|
|
assert(Existing && "Namespace containing handler does not exist!");
|
|
|
|
NS = Existing->getIfNamespace();
|
|
assert(NS && "Invalid namespace, registered as a regular pragma handler!");
|
|
}
|
|
|
|
NS->RemovePragmaHandler(Handler);
|
|
|
|
// If this is a non-default namespace and it is now empty, remove
|
|
// it.
|
|
if (NS != PragmaHandlers && NS->IsEmpty()) {
|
|
PragmaHandlers->RemovePragmaHandler(NS);
|
|
delete NS;
|
|
}
|
|
}
|
|
|
|
bool Preprocessor::LexOnOffSwitch(tok::OnOffSwitch &Result) {
|
|
Token Tok;
|
|
LexUnexpandedToken(Tok);
|
|
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::ext_on_off_switch_syntax);
|
|
return true;
|
|
}
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
if (II->isStr("ON"))
|
|
Result = tok::OOS_ON;
|
|
else if (II->isStr("OFF"))
|
|
Result = tok::OOS_OFF;
|
|
else if (II->isStr("DEFAULT"))
|
|
Result = tok::OOS_DEFAULT;
|
|
else {
|
|
Diag(Tok, diag::ext_on_off_switch_syntax);
|
|
return true;
|
|
}
|
|
|
|
// Verify that this is followed by EOD.
|
|
LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::eod))
|
|
Diag(Tok, diag::ext_pragma_syntax_eod);
|
|
return false;
|
|
}
|
|
|
|
namespace {
|
|
/// PragmaOnceHandler - "\#pragma once" marks the file as atomically included.
|
|
struct PragmaOnceHandler : public PragmaHandler {
|
|
PragmaOnceHandler() : PragmaHandler("once") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &OnceTok) {
|
|
PP.CheckEndOfDirective("pragma once");
|
|
PP.HandlePragmaOnce(OnceTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaMarkHandler - "\#pragma mark ..." is ignored by the compiler, and the
|
|
/// rest of the line is not lexed.
|
|
struct PragmaMarkHandler : public PragmaHandler {
|
|
PragmaMarkHandler() : PragmaHandler("mark") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &MarkTok) {
|
|
PP.HandlePragmaMark();
|
|
}
|
|
};
|
|
|
|
/// PragmaPoisonHandler - "\#pragma poison x" marks x as not usable.
|
|
struct PragmaPoisonHandler : public PragmaHandler {
|
|
PragmaPoisonHandler() : PragmaHandler("poison") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PoisonTok) {
|
|
PP.HandlePragmaPoison(PoisonTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaSystemHeaderHandler - "\#pragma system_header" marks the current file
|
|
/// as a system header, which silences warnings in it.
|
|
struct PragmaSystemHeaderHandler : public PragmaHandler {
|
|
PragmaSystemHeaderHandler() : PragmaHandler("system_header") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &SHToken) {
|
|
PP.HandlePragmaSystemHeader(SHToken);
|
|
PP.CheckEndOfDirective("pragma");
|
|
}
|
|
};
|
|
struct PragmaDependencyHandler : public PragmaHandler {
|
|
PragmaDependencyHandler() : PragmaHandler("dependency") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DepToken) {
|
|
PP.HandlePragmaDependency(DepToken);
|
|
}
|
|
};
|
|
|
|
struct PragmaDebugHandler : public PragmaHandler {
|
|
PragmaDebugHandler() : PragmaHandler("__debug") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DepToken) {
|
|
Token Tok;
|
|
PP.LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::identifier)) {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
|
|
if (II->isStr("assert")) {
|
|
llvm_unreachable("This is an assertion!");
|
|
} else if (II->isStr("crash")) {
|
|
*(volatile int*) 0x11 = 0;
|
|
} else if (II->isStr("parser_crash")) {
|
|
Token Crasher;
|
|
Crasher.setKind(tok::annot_pragma_parser_crash);
|
|
PP.EnterToken(Crasher);
|
|
} else if (II->isStr("llvm_fatal_error")) {
|
|
llvm::report_fatal_error("#pragma clang __debug llvm_fatal_error");
|
|
} else if (II->isStr("llvm_unreachable")) {
|
|
llvm_unreachable("#pragma clang __debug llvm_unreachable");
|
|
} else if (II->isStr("overflow_stack")) {
|
|
DebugOverflowStack();
|
|
} else if (II->isStr("handle_crash")) {
|
|
llvm::CrashRecoveryContext *CRC =llvm::CrashRecoveryContext::GetCurrent();
|
|
if (CRC)
|
|
CRC->HandleCrash();
|
|
} else {
|
|
PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command)
|
|
<< II->getName();
|
|
}
|
|
}
|
|
|
|
// Disable MSVC warning about runtime stack overflow.
|
|
#ifdef _MSC_VER
|
|
#pragma warning(disable : 4717)
|
|
#endif
|
|
void DebugOverflowStack() {
|
|
DebugOverflowStack();
|
|
}
|
|
#ifdef _MSC_VER
|
|
#pragma warning(default : 4717)
|
|
#endif
|
|
|
|
};
|
|
|
|
/// PragmaDiagnosticHandler - e.g. '\#pragma GCC diagnostic ignored "-Wformat"'
|
|
struct PragmaDiagnosticHandler : public PragmaHandler {
|
|
private:
|
|
const char *Namespace;
|
|
public:
|
|
explicit PragmaDiagnosticHandler(const char *NS) :
|
|
PragmaHandler("diagnostic"), Namespace(NS) {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DiagToken) {
|
|
SourceLocation DiagLoc = DiagToken.getLocation();
|
|
Token Tok;
|
|
PP.LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::identifier)) {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
PPCallbacks *Callbacks = PP.getPPCallbacks();
|
|
|
|
diag::Mapping Map;
|
|
if (II->isStr("warning"))
|
|
Map = diag::MAP_WARNING;
|
|
else if (II->isStr("error"))
|
|
Map = diag::MAP_ERROR;
|
|
else if (II->isStr("ignored"))
|
|
Map = diag::MAP_IGNORE;
|
|
else if (II->isStr("fatal"))
|
|
Map = diag::MAP_FATAL;
|
|
else if (II->isStr("pop")) {
|
|
if (!PP.getDiagnostics().popMappings(DiagLoc))
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_cannot_pop);
|
|
else if (Callbacks)
|
|
Callbacks->PragmaDiagnosticPop(DiagLoc, Namespace);
|
|
return;
|
|
} else if (II->isStr("push")) {
|
|
PP.getDiagnostics().pushMappings(DiagLoc);
|
|
if (Callbacks)
|
|
Callbacks->PragmaDiagnosticPush(DiagLoc, Namespace);
|
|
return;
|
|
} else {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
|
|
PP.LexUnexpandedToken(Tok);
|
|
|
|
// We need at least one string.
|
|
if (Tok.isNot(tok::string_literal)) {
|
|
PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token);
|
|
return;
|
|
}
|
|
|
|
// String concatenation allows multiple strings, which can even come from
|
|
// macro expansion.
|
|
// "foo " "bar" "Baz"
|
|
SmallVector<Token, 4> StrToks;
|
|
while (Tok.is(tok::string_literal)) {
|
|
StrToks.push_back(Tok);
|
|
PP.LexUnexpandedToken(Tok);
|
|
}
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token);
|
|
return;
|
|
}
|
|
|
|
// Concatenate and parse the strings.
|
|
StringLiteralParser Literal(&StrToks[0], StrToks.size(), PP);
|
|
assert(Literal.isAscii() && "Didn't allow wide strings in");
|
|
if (Literal.hadError)
|
|
return;
|
|
if (Literal.Pascal) {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
|
|
StringRef WarningName(Literal.GetString());
|
|
|
|
if (WarningName.size() < 3 || WarningName[0] != '-' ||
|
|
WarningName[1] != 'W') {
|
|
PP.Diag(StrToks[0].getLocation(),
|
|
diag::warn_pragma_diagnostic_invalid_option);
|
|
return;
|
|
}
|
|
|
|
if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.substr(2),
|
|
Map, DiagLoc))
|
|
PP.Diag(StrToks[0].getLocation(),
|
|
diag::warn_pragma_diagnostic_unknown_warning) << WarningName;
|
|
else if (Callbacks)
|
|
Callbacks->PragmaDiagnostic(DiagLoc, Namespace, Map, WarningName);
|
|
}
|
|
};
|
|
|
|
/// PragmaCommentHandler - "\#pragma comment ...".
|
|
struct PragmaCommentHandler : public PragmaHandler {
|
|
PragmaCommentHandler() : PragmaHandler("comment") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &CommentTok) {
|
|
PP.HandlePragmaComment(CommentTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaIncludeAliasHandler - "\#pragma include_alias("...")".
|
|
struct PragmaIncludeAliasHandler : public PragmaHandler {
|
|
PragmaIncludeAliasHandler() : PragmaHandler("include_alias") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &IncludeAliasTok) {
|
|
PP.HandlePragmaIncludeAlias(IncludeAliasTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaMessageHandler - "\#pragma message("...")".
|
|
struct PragmaMessageHandler : public PragmaHandler {
|
|
PragmaMessageHandler() : PragmaHandler("message") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &CommentTok) {
|
|
PP.HandlePragmaMessage(CommentTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaPushMacroHandler - "\#pragma push_macro" saves the value of the
|
|
/// macro on the top of the stack.
|
|
struct PragmaPushMacroHandler : public PragmaHandler {
|
|
PragmaPushMacroHandler() : PragmaHandler("push_macro") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PushMacroTok) {
|
|
PP.HandlePragmaPushMacro(PushMacroTok);
|
|
}
|
|
};
|
|
|
|
|
|
/// PragmaPopMacroHandler - "\#pragma pop_macro" sets the value of the
|
|
/// macro to the value on the top of the stack.
|
|
struct PragmaPopMacroHandler : public PragmaHandler {
|
|
PragmaPopMacroHandler() : PragmaHandler("pop_macro") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PopMacroTok) {
|
|
PP.HandlePragmaPopMacro(PopMacroTok);
|
|
}
|
|
};
|
|
|
|
// Pragma STDC implementations.
|
|
|
|
/// PragmaSTDC_FENV_ACCESSHandler - "\#pragma STDC FENV_ACCESS ...".
|
|
struct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler {
|
|
PragmaSTDC_FENV_ACCESSHandler() : PragmaHandler("FENV_ACCESS") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) {
|
|
tok::OnOffSwitch OOS;
|
|
if (PP.LexOnOffSwitch(OOS))
|
|
return;
|
|
if (OOS == tok::OOS_ON)
|
|
PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported);
|
|
}
|
|
};
|
|
|
|
/// PragmaSTDC_CX_LIMITED_RANGEHandler - "\#pragma STDC CX_LIMITED_RANGE ...".
|
|
struct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler {
|
|
PragmaSTDC_CX_LIMITED_RANGEHandler()
|
|
: PragmaHandler("CX_LIMITED_RANGE") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) {
|
|
tok::OnOffSwitch OOS;
|
|
PP.LexOnOffSwitch(OOS);
|
|
}
|
|
};
|
|
|
|
/// PragmaSTDC_UnknownHandler - "\#pragma STDC ...".
|
|
struct PragmaSTDC_UnknownHandler : public PragmaHandler {
|
|
PragmaSTDC_UnknownHandler() {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &UnknownTok) {
|
|
// C99 6.10.6p2, unknown forms are not allowed.
|
|
PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored);
|
|
}
|
|
};
|
|
|
|
/// PragmaARCCFCodeAuditedHandler -
|
|
/// \#pragma clang arc_cf_code_audited begin/end
|
|
struct PragmaARCCFCodeAuditedHandler : public PragmaHandler {
|
|
PragmaARCCFCodeAuditedHandler() : PragmaHandler("arc_cf_code_audited") {}
|
|
virtual void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &NameTok) {
|
|
SourceLocation Loc = NameTok.getLocation();
|
|
bool IsBegin;
|
|
|
|
Token Tok;
|
|
|
|
// Lex the 'begin' or 'end'.
|
|
PP.LexUnexpandedToken(Tok);
|
|
const IdentifierInfo *BeginEnd = Tok.getIdentifierInfo();
|
|
if (BeginEnd && BeginEnd->isStr("begin")) {
|
|
IsBegin = true;
|
|
} else if (BeginEnd && BeginEnd->isStr("end")) {
|
|
IsBegin = false;
|
|
} else {
|
|
PP.Diag(Tok.getLocation(), diag::err_pp_arc_cf_code_audited_syntax);
|
|
return;
|
|
}
|
|
|
|
// Verify that this is followed by EOD.
|
|
PP.LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::eod))
|
|
PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma";
|
|
|
|
// The start location of the active audit.
|
|
SourceLocation BeginLoc = PP.getPragmaARCCFCodeAuditedLoc();
|
|
|
|
// The start location we want after processing this.
|
|
SourceLocation NewLoc;
|
|
|
|
if (IsBegin) {
|
|
// Complain about attempts to re-enter an audit.
|
|
if (BeginLoc.isValid()) {
|
|
PP.Diag(Loc, diag::err_pp_double_begin_of_arc_cf_code_audited);
|
|
PP.Diag(BeginLoc, diag::note_pragma_entered_here);
|
|
}
|
|
NewLoc = Loc;
|
|
} else {
|
|
// Complain about attempts to leave an audit that doesn't exist.
|
|
if (!BeginLoc.isValid()) {
|
|
PP.Diag(Loc, diag::err_pp_unmatched_end_of_arc_cf_code_audited);
|
|
return;
|
|
}
|
|
NewLoc = SourceLocation();
|
|
}
|
|
|
|
PP.setPragmaARCCFCodeAuditedLoc(NewLoc);
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
|
|
/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas:
|
|
/// \#pragma GCC poison/system_header/dependency and \#pragma once.
|
|
void Preprocessor::RegisterBuiltinPragmas() {
|
|
AddPragmaHandler(new PragmaOnceHandler());
|
|
AddPragmaHandler(new PragmaMarkHandler());
|
|
AddPragmaHandler(new PragmaPushMacroHandler());
|
|
AddPragmaHandler(new PragmaPopMacroHandler());
|
|
AddPragmaHandler(new PragmaMessageHandler());
|
|
|
|
// #pragma GCC ...
|
|
AddPragmaHandler("GCC", new PragmaPoisonHandler());
|
|
AddPragmaHandler("GCC", new PragmaSystemHeaderHandler());
|
|
AddPragmaHandler("GCC", new PragmaDependencyHandler());
|
|
AddPragmaHandler("GCC", new PragmaDiagnosticHandler("GCC"));
|
|
// #pragma clang ...
|
|
AddPragmaHandler("clang", new PragmaPoisonHandler());
|
|
AddPragmaHandler("clang", new PragmaSystemHeaderHandler());
|
|
AddPragmaHandler("clang", new PragmaDebugHandler());
|
|
AddPragmaHandler("clang", new PragmaDependencyHandler());
|
|
AddPragmaHandler("clang", new PragmaDiagnosticHandler("clang"));
|
|
AddPragmaHandler("clang", new PragmaARCCFCodeAuditedHandler());
|
|
|
|
AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler());
|
|
AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler());
|
|
AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler());
|
|
|
|
// MS extensions.
|
|
if (LangOpts.MicrosoftExt) {
|
|
AddPragmaHandler(new PragmaCommentHandler());
|
|
AddPragmaHandler(new PragmaIncludeAliasHandler());
|
|
}
|
|
}
|