forked from OSchip/llvm-project
1558 lines
52 KiB
C++
1558 lines
52 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/Basic/FileManager.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Basic/TokenKinds.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/LexDiagnostic.h"
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#include "clang/Lex/MacroInfo.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Lex/PreprocessorLexer.h"
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#include "clang/Lex/PTHLexer.h"
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#include "clang/Lex/Token.h"
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#include "clang/Lex/TokenLexer.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/CrashRecoveryContext.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <algorithm>
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#include <cassert>
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#include <cstdint>
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#include <limits>
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#include <string>
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#include <vector>
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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(StringRef Name) : PragmaHandler(Name) {}
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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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llvm::DeleteContainerSeconds(Handlers);
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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 ? nullptr : 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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Handlers[Handler->getName()] = 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) {
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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(SourceLocation IntroducerLoc,
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PragmaIntroducerKind Introducer) {
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if (Callbacks)
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Callbacks->PragmaDirective(IntroducerLoc, 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, 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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} // end anonymous namespace
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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::isStringLiteral(Tok.getKind())) {
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Diag(PragmaLoc, diag::err__Pragma_malformed);
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// Skip bad tokens, and the ')', if present.
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if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::eof))
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Lex(Tok);
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while (Tok.isNot(tok::r_paren) &&
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!Tok.isAtStartOfLine() &&
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Tok.isNot(tok::eof))
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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 C11 6.10.9.1:
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// "The string literal is destringized by deleting any encoding prefix,
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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' || StrVal[0] == 'U' ||
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(StrVal[0] == 'u' && StrVal[1] != '8'))
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StrVal.erase(StrVal.begin());
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else if (StrVal[0] == 'u')
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StrVal.erase(StrVal.begin(), StrVal.begin() + 2);
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if (StrVal[0] == 'R') {
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// FIXME: C++11 does not specify how to handle raw-string-literals here.
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// We strip off the 'R', the quotes, the d-char-sequences, and the parens.
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assert(StrVal[1] == '"' && StrVal[StrVal.size() - 1] == '"' &&
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"Invalid raw string token!");
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// Measure the length of the d-char-sequence.
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unsigned NumDChars = 0;
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while (StrVal[2 + NumDChars] != '(') {
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assert(NumDChars < (StrVal.size() - 5) / 2 &&
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"Invalid raw string token!");
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++NumDChars;
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}
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assert(StrVal[StrVal.size() - 2 - NumDChars] == ')');
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// Remove 'R " d-char-sequence' and 'd-char-sequence "'. We'll replace the
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// parens below.
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StrVal.erase(0, 2 + NumDChars);
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StrVal.erase(StrVal.size() - 1 - NumDChars);
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} else {
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assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
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"Invalid string token!");
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// Remove escaped quotes and escapes.
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unsigned ResultPos = 1;
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for (size_t i = 1, e = StrVal.size() - 1; i != e; ++i) {
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// Skip escapes. \\ -> '\' and \" -> '"'.
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if (StrVal[i] == '\\' && i + 1 < e &&
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(StrVal[i + 1] == '\\' || StrVal[i + 1] == '"'))
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++i;
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StrVal[ResultPos++] = StrVal[i];
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}
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StrVal.erase(StrVal.begin() + ResultPos, StrVal.end() - 1);
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}
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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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// 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, 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, nullptr);
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// With everything set up, lex this as a #pragma directive.
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HandlePragmaDirective(PragmaLoc, 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(PragmaLoc, 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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// Don't honor the 'once' when handling the primary source file, unless
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// this is a prefix to a TU, which indicates we're generating a PCH file, or
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// when the main file is a header (e.g. when -xc-header is provided on the
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// commandline).
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if (isInPrimaryFile() && TUKind != TU_Prefix && !getLangOpts().IsHeaderFile) {
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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() {
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Token Tok;
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while (true) {
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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 (isMacroDefined(II))
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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()+1,
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FilenameID, /*IsEntry=*/false, /*IsExit=*/false,
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/*IsSystem=*/true, /*IsExternC=*/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;
|
|
const FileEntry *File =
|
|
LookupFile(FilenameTok.getLocation(), Filename, isAngled, nullptr,
|
|
nullptr, CurDir, nullptr, nullptr, nullptr);
|
|
if (!File) {
|
|
if (!SuppressIncludeNotFoundError)
|
|
Diag(FilenameTok, diag::err_pp_file_not_found) << Filename;
|
|
return;
|
|
}
|
|
|
|
const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry();
|
|
|
|
// If this file is older than the file it depends on, emit a diagnostic.
|
|
if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) {
|
|
// Lex tokens at the end of the message and include them in the message.
|
|
std::string Message;
|
|
Lex(DependencyTok);
|
|
while (DependencyTok.isNot(tok::eod)) {
|
|
Message += getSpelling(DependencyTok) + " ";
|
|
Lex(DependencyTok);
|
|
}
|
|
|
|
// Remove the trailing ' ' if present.
|
|
if (!Message.empty())
|
|
Message.erase(Message.end()-1);
|
|
Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message;
|
|
}
|
|
}
|
|
|
|
/// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro.
|
|
/// Return the IdentifierInfo* associated with the macro to push or pop.
|
|
IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) {
|
|
// Remember the pragma token location.
|
|
Token PragmaTok = Tok;
|
|
|
|
// Read the '('.
|
|
Lex(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed)
|
|
<< getSpelling(PragmaTok);
|
|
return nullptr;
|
|
}
|
|
|
|
// 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 nullptr;
|
|
}
|
|
|
|
if (Tok.hasUDSuffix()) {
|
|
Diag(Tok, diag::err_invalid_string_udl);
|
|
return nullptr;
|
|
}
|
|
|
|
// 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 nullptr;
|
|
}
|
|
|
|
assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
|
|
"Invalid string token!");
|
|
|
|
// Create a Token from the string.
|
|
Token MacroTok;
|
|
MacroTok.startToken();
|
|
MacroTok.setKind(tok::raw_identifier);
|
|
CreateString(StringRef(&StrVal[1], StrVal.size() - 2), MacroTok);
|
|
|
|
// Get the IdentifierInfo of MacroToPushTok.
|
|
return LookUpIdentifierInfo(MacroTok);
|
|
}
|
|
|
|
/// \brief Handle \#pragma push_macro.
|
|
///
|
|
/// The syntax is:
|
|
/// \code
|
|
/// #pragma push_macro("macro")
|
|
/// \endcode
|
|
void Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) {
|
|
// Parse the pragma directive and get the macro IdentifierInfo*.
|
|
IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok);
|
|
if (!IdentInfo) return;
|
|
|
|
// Get the MacroInfo associated with IdentInfo.
|
|
MacroInfo *MI = getMacroInfo(IdentInfo);
|
|
|
|
if (MI) {
|
|
// Allow the original MacroInfo to be redefined later.
|
|
MI->setIsAllowRedefinitionsWithoutWarning(true);
|
|
}
|
|
|
|
// Push the cloned MacroInfo so we can retrieve it later.
|
|
PragmaPushMacroInfo[IdentInfo].push_back(MI);
|
|
}
|
|
|
|
/// \brief Handle \#pragma pop_macro.
|
|
///
|
|
/// The syntax is:
|
|
/// \code
|
|
/// #pragma pop_macro("macro")
|
|
/// \endcode
|
|
void Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) {
|
|
SourceLocation MessageLoc = PopMacroTok.getLocation();
|
|
|
|
// Parse the pragma directive and get the macro IdentifierInfo*.
|
|
IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok);
|
|
if (!IdentInfo) return;
|
|
|
|
// Find the vector<MacroInfo*> associated with the macro.
|
|
llvm::DenseMap<IdentifierInfo*, std::vector<MacroInfo*> >::iterator iter =
|
|
PragmaPushMacroInfo.find(IdentInfo);
|
|
if (iter != PragmaPushMacroInfo.end()) {
|
|
// Forget the MacroInfo currently associated with IdentInfo.
|
|
if (MacroInfo *MI = getMacroInfo(IdentInfo)) {
|
|
if (MI->isWarnIfUnused())
|
|
WarnUnusedMacroLocs.erase(MI->getDefinitionLoc());
|
|
appendMacroDirective(IdentInfo, AllocateUndefMacroDirective(MessageLoc));
|
|
}
|
|
|
|
// Get the MacroInfo we want to reinstall.
|
|
MacroInfo *MacroToReInstall = iter->second.back();
|
|
|
|
if (MacroToReInstall)
|
|
// Reinstall the previously pushed macro.
|
|
appendDefMacroDirective(IdentInfo, MacroToReInstall, MessageLoc);
|
|
|
|
// Pop PragmaPushMacroInfo stack.
|
|
iter->second.pop_back();
|
|
if (iter->second.empty())
|
|
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;
|
|
} 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;
|
|
} 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.get();
|
|
|
|
// 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 != nullptr && "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.get();
|
|
|
|
// 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.get() && 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") {}
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &OnceTok) override {
|
|
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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &MarkTok) override {
|
|
PP.HandlePragmaMark();
|
|
}
|
|
};
|
|
|
|
/// PragmaPoisonHandler - "\#pragma poison x" marks x as not usable.
|
|
struct PragmaPoisonHandler : public PragmaHandler {
|
|
PragmaPoisonHandler() : PragmaHandler("poison") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PoisonTok) override {
|
|
PP.HandlePragmaPoison();
|
|
}
|
|
};
|
|
|
|
/// 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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &SHToken) override {
|
|
PP.HandlePragmaSystemHeader(SHToken);
|
|
PP.CheckEndOfDirective("pragma");
|
|
}
|
|
};
|
|
|
|
struct PragmaDependencyHandler : public PragmaHandler {
|
|
PragmaDependencyHandler() : PragmaHandler("dependency") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DepToken) override {
|
|
PP.HandlePragmaDependency(DepToken);
|
|
}
|
|
};
|
|
|
|
struct PragmaDebugHandler : public PragmaHandler {
|
|
PragmaDebugHandler() : PragmaHandler("__debug") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DepToken) override {
|
|
Token Tok;
|
|
PP.LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::identifier)) {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
|
|
if (II->isStr("assert")) {
|
|
llvm_unreachable("This is an assertion!");
|
|
} else if (II->isStr("crash")) {
|
|
LLVM_BUILTIN_TRAP;
|
|
} else if (II->isStr("parser_crash")) {
|
|
Token Crasher;
|
|
Crasher.startToken();
|
|
Crasher.setKind(tok::annot_pragma_parser_crash);
|
|
Crasher.setAnnotationRange(SourceRange(Tok.getLocation()));
|
|
PP.EnterToken(Crasher);
|
|
} else if (II->isStr("dump")) {
|
|
Token Identifier;
|
|
PP.LexUnexpandedToken(Identifier);
|
|
if (auto *DumpII = Identifier.getIdentifierInfo()) {
|
|
Token DumpAnnot;
|
|
DumpAnnot.startToken();
|
|
DumpAnnot.setKind(tok::annot_pragma_dump);
|
|
DumpAnnot.setAnnotationRange(
|
|
SourceRange(Tok.getLocation(), Identifier.getLocation()));
|
|
DumpAnnot.setAnnotationValue(DumpII);
|
|
PP.DiscardUntilEndOfDirective();
|
|
PP.EnterToken(DumpAnnot);
|
|
} else {
|
|
PP.Diag(Identifier, diag::warn_pragma_debug_missing_argument)
|
|
<< II->getName();
|
|
}
|
|
} 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("macro")) {
|
|
Token MacroName;
|
|
PP.LexUnexpandedToken(MacroName);
|
|
auto *MacroII = MacroName.getIdentifierInfo();
|
|
if (MacroII)
|
|
PP.dumpMacroInfo(MacroII);
|
|
else
|
|
PP.Diag(MacroName, diag::warn_pragma_debug_missing_argument)
|
|
<< II->getName();
|
|
} else if (II->isStr("overflow_stack")) {
|
|
DebugOverflowStack();
|
|
} else if (II->isStr("handle_crash")) {
|
|
llvm::CrashRecoveryContext *CRC =llvm::CrashRecoveryContext::GetCurrent();
|
|
if (CRC)
|
|
CRC->HandleCrash();
|
|
} else if (II->isStr("captured")) {
|
|
HandleCaptured(PP);
|
|
} else {
|
|
PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command)
|
|
<< II->getName();
|
|
}
|
|
|
|
PPCallbacks *Callbacks = PP.getPPCallbacks();
|
|
if (Callbacks)
|
|
Callbacks->PragmaDebug(Tok.getLocation(), II->getName());
|
|
}
|
|
|
|
void HandleCaptured(Preprocessor &PP) {
|
|
// Skip if emitting preprocessed output.
|
|
if (PP.isPreprocessedOutput())
|
|
return;
|
|
|
|
Token Tok;
|
|
PP.LexUnexpandedToken(Tok);
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol)
|
|
<< "pragma clang __debug captured";
|
|
return;
|
|
}
|
|
|
|
SourceLocation NameLoc = Tok.getLocation();
|
|
MutableArrayRef<Token> Toks(
|
|
PP.getPreprocessorAllocator().Allocate<Token>(1), 1);
|
|
Toks[0].startToken();
|
|
Toks[0].setKind(tok::annot_pragma_captured);
|
|
Toks[0].setLocation(NameLoc);
|
|
|
|
PP.EnterTokenStream(Toks, /*DisableMacroExpansion=*/true);
|
|
}
|
|
|
|
// Disable MSVC warning about runtime stack overflow.
|
|
#ifdef _MSC_VER
|
|
#pragma warning(disable : 4717)
|
|
#endif
|
|
static void DebugOverflowStack() {
|
|
void (*volatile Self)() = DebugOverflowStack;
|
|
Self();
|
|
}
|
|
#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) {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &DiagToken) override {
|
|
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();
|
|
|
|
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;
|
|
}
|
|
|
|
diag::Severity SV = llvm::StringSwitch<diag::Severity>(II->getName())
|
|
.Case("ignored", diag::Severity::Ignored)
|
|
.Case("warning", diag::Severity::Warning)
|
|
.Case("error", diag::Severity::Error)
|
|
.Case("fatal", diag::Severity::Fatal)
|
|
.Default(diag::Severity());
|
|
|
|
if (SV == diag::Severity()) {
|
|
PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
|
|
return;
|
|
}
|
|
|
|
PP.LexUnexpandedToken(Tok);
|
|
SourceLocation StringLoc = Tok.getLocation();
|
|
|
|
std::string WarningName;
|
|
if (!PP.FinishLexStringLiteral(Tok, WarningName, "pragma diagnostic",
|
|
/*MacroExpansion=*/false))
|
|
return;
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token);
|
|
return;
|
|
}
|
|
|
|
if (WarningName.size() < 3 || WarningName[0] != '-' ||
|
|
(WarningName[1] != 'W' && WarningName[1] != 'R')) {
|
|
PP.Diag(StringLoc, diag::warn_pragma_diagnostic_invalid_option);
|
|
return;
|
|
}
|
|
|
|
diag::Flavor Flavor = WarningName[1] == 'W' ? diag::Flavor::WarningOrError
|
|
: diag::Flavor::Remark;
|
|
StringRef Group = StringRef(WarningName).substr(2);
|
|
bool unknownDiag = false;
|
|
if (Group == "everything") {
|
|
// Special handling for pragma clang diagnostic ... "-Weverything".
|
|
// There is no formal group named "everything", so there has to be a
|
|
// special case for it.
|
|
PP.getDiagnostics().setSeverityForAll(Flavor, SV, DiagLoc);
|
|
} else
|
|
unknownDiag = PP.getDiagnostics().setSeverityForGroup(Flavor, Group, SV,
|
|
DiagLoc);
|
|
if (unknownDiag)
|
|
PP.Diag(StringLoc, diag::warn_pragma_diagnostic_unknown_warning)
|
|
<< WarningName;
|
|
else if (Callbacks)
|
|
Callbacks->PragmaDiagnostic(DiagLoc, Namespace, SV, WarningName);
|
|
}
|
|
};
|
|
|
|
/// "\#pragma warning(...)". MSVC's diagnostics do not map cleanly to clang's
|
|
/// diagnostics, so we don't really implement this pragma. We parse it and
|
|
/// ignore it to avoid -Wunknown-pragma warnings.
|
|
struct PragmaWarningHandler : public PragmaHandler {
|
|
PragmaWarningHandler() : PragmaHandler("warning") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) override {
|
|
// Parse things like:
|
|
// warning(push, 1)
|
|
// warning(pop)
|
|
// warning(disable : 1 2 3 ; error : 4 5 6 ; suppress : 7 8 9)
|
|
SourceLocation DiagLoc = Tok.getLocation();
|
|
PPCallbacks *Callbacks = PP.getPPCallbacks();
|
|
|
|
PP.Lex(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_expected) << "(";
|
|
return;
|
|
}
|
|
|
|
PP.Lex(Tok);
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
|
|
if (II && II->isStr("push")) {
|
|
// #pragma warning( push[ ,n ] )
|
|
int Level = -1;
|
|
PP.Lex(Tok);
|
|
if (Tok.is(tok::comma)) {
|
|
PP.Lex(Tok);
|
|
uint64_t Value;
|
|
if (Tok.is(tok::numeric_constant) &&
|
|
PP.parseSimpleIntegerLiteral(Tok, Value))
|
|
Level = int(Value);
|
|
if (Level < 0 || Level > 4) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_push_level);
|
|
return;
|
|
}
|
|
}
|
|
if (Callbacks)
|
|
Callbacks->PragmaWarningPush(DiagLoc, Level);
|
|
} else if (II && II->isStr("pop")) {
|
|
// #pragma warning( pop )
|
|
PP.Lex(Tok);
|
|
if (Callbacks)
|
|
Callbacks->PragmaWarningPop(DiagLoc);
|
|
} else {
|
|
// #pragma warning( warning-specifier : warning-number-list
|
|
// [; warning-specifier : warning-number-list...] )
|
|
while (true) {
|
|
II = Tok.getIdentifierInfo();
|
|
if (!II && !Tok.is(tok::numeric_constant)) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid);
|
|
return;
|
|
}
|
|
|
|
// Figure out which warning specifier this is.
|
|
bool SpecifierValid;
|
|
StringRef Specifier;
|
|
llvm::SmallString<1> SpecifierBuf;
|
|
if (II) {
|
|
Specifier = II->getName();
|
|
SpecifierValid = llvm::StringSwitch<bool>(Specifier)
|
|
.Cases("default", "disable", "error", "once",
|
|
"suppress", true)
|
|
.Default(false);
|
|
// If we read a correct specifier, snatch next token (that should be
|
|
// ":", checked later).
|
|
if (SpecifierValid)
|
|
PP.Lex(Tok);
|
|
} else {
|
|
// Token is a numeric constant. It should be either 1, 2, 3 or 4.
|
|
uint64_t Value;
|
|
Specifier = PP.getSpelling(Tok, SpecifierBuf);
|
|
if (PP.parseSimpleIntegerLiteral(Tok, Value)) {
|
|
SpecifierValid = (Value >= 1) && (Value <= 4);
|
|
} else
|
|
SpecifierValid = false;
|
|
// Next token already snatched by parseSimpleIntegerLiteral.
|
|
}
|
|
|
|
if (!SpecifierValid) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid);
|
|
return;
|
|
}
|
|
if (Tok.isNot(tok::colon)) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_expected) << ":";
|
|
return;
|
|
}
|
|
|
|
// Collect the warning ids.
|
|
SmallVector<int, 4> Ids;
|
|
PP.Lex(Tok);
|
|
while (Tok.is(tok::numeric_constant)) {
|
|
uint64_t Value;
|
|
if (!PP.parseSimpleIntegerLiteral(Tok, Value) || Value == 0 ||
|
|
Value > std::numeric_limits<int>::max()) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_expected_number);
|
|
return;
|
|
}
|
|
Ids.push_back(int(Value));
|
|
}
|
|
if (Callbacks)
|
|
Callbacks->PragmaWarning(DiagLoc, Specifier, Ids);
|
|
|
|
// Parse the next specifier if there is a semicolon.
|
|
if (Tok.isNot(tok::semi))
|
|
break;
|
|
PP.Lex(Tok);
|
|
}
|
|
}
|
|
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
PP.Diag(Tok, diag::warn_pragma_warning_expected) << ")";
|
|
return;
|
|
}
|
|
|
|
PP.Lex(Tok);
|
|
if (Tok.isNot(tok::eod))
|
|
PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma warning";
|
|
}
|
|
};
|
|
|
|
/// PragmaIncludeAliasHandler - "\#pragma include_alias("...")".
|
|
struct PragmaIncludeAliasHandler : public PragmaHandler {
|
|
PragmaIncludeAliasHandler() : PragmaHandler("include_alias") {}
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &IncludeAliasTok) override {
|
|
PP.HandlePragmaIncludeAlias(IncludeAliasTok);
|
|
}
|
|
};
|
|
|
|
/// PragmaMessageHandler - Handle the microsoft and gcc \#pragma message
|
|
/// extension. The syntax is:
|
|
/// \code
|
|
/// #pragma message(string)
|
|
/// \endcode
|
|
/// OR, in GCC mode:
|
|
/// \code
|
|
/// #pragma message string
|
|
/// \endcode
|
|
/// string is a string, which is fully macro expanded, and permits string
|
|
/// concatenation, embedded escape characters, etc... See MSDN for more details.
|
|
/// Also handles \#pragma GCC warning and \#pragma GCC error which take the same
|
|
/// form as \#pragma message.
|
|
struct PragmaMessageHandler : public PragmaHandler {
|
|
private:
|
|
const PPCallbacks::PragmaMessageKind Kind;
|
|
const StringRef Namespace;
|
|
|
|
static const char* PragmaKind(PPCallbacks::PragmaMessageKind Kind,
|
|
bool PragmaNameOnly = false) {
|
|
switch (Kind) {
|
|
case PPCallbacks::PMK_Message:
|
|
return PragmaNameOnly ? "message" : "pragma message";
|
|
case PPCallbacks::PMK_Warning:
|
|
return PragmaNameOnly ? "warning" : "pragma warning";
|
|
case PPCallbacks::PMK_Error:
|
|
return PragmaNameOnly ? "error" : "pragma error";
|
|
}
|
|
llvm_unreachable("Unknown PragmaMessageKind!");
|
|
}
|
|
|
|
public:
|
|
PragmaMessageHandler(PPCallbacks::PragmaMessageKind Kind,
|
|
StringRef Namespace = StringRef())
|
|
: PragmaHandler(PragmaKind(Kind, true)), Kind(Kind), Namespace(Namespace) {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) override {
|
|
SourceLocation MessageLoc = Tok.getLocation();
|
|
PP.Lex(Tok);
|
|
bool ExpectClosingParen = false;
|
|
switch (Tok.getKind()) {
|
|
case tok::l_paren:
|
|
// We have a MSVC style pragma message.
|
|
ExpectClosingParen = true;
|
|
// Read the string.
|
|
PP.Lex(Tok);
|
|
break;
|
|
case tok::string_literal:
|
|
// We have a GCC style pragma message, and we just read the string.
|
|
break;
|
|
default:
|
|
PP.Diag(MessageLoc, diag::err_pragma_message_malformed) << Kind;
|
|
return;
|
|
}
|
|
|
|
std::string MessageString;
|
|
if (!PP.FinishLexStringLiteral(Tok, MessageString, PragmaKind(Kind),
|
|
/*MacroExpansion=*/true))
|
|
return;
|
|
|
|
if (ExpectClosingParen) {
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind;
|
|
return;
|
|
}
|
|
PP.Lex(Tok); // eat the r_paren.
|
|
}
|
|
|
|
if (Tok.isNot(tok::eod)) {
|
|
PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind;
|
|
return;
|
|
}
|
|
|
|
// Output the message.
|
|
PP.Diag(MessageLoc, (Kind == PPCallbacks::PMK_Error)
|
|
? diag::err_pragma_message
|
|
: diag::warn_pragma_message) << MessageString;
|
|
|
|
// If the pragma is lexically sound, notify any interested PPCallbacks.
|
|
if (PPCallbacks *Callbacks = PP.getPPCallbacks())
|
|
Callbacks->PragmaMessage(MessageLoc, Namespace, Kind, MessageString);
|
|
}
|
|
};
|
|
|
|
/// PragmaPushMacroHandler - "\#pragma push_macro" saves the value of the
|
|
/// macro on the top of the stack.
|
|
struct PragmaPushMacroHandler : public PragmaHandler {
|
|
PragmaPushMacroHandler() : PragmaHandler("push_macro") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PushMacroTok) override {
|
|
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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &PopMacroTok) override {
|
|
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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) override {
|
|
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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &Tok) override {
|
|
tok::OnOffSwitch OOS;
|
|
PP.LexOnOffSwitch(OOS);
|
|
}
|
|
};
|
|
|
|
/// PragmaSTDC_UnknownHandler - "\#pragma STDC ...".
|
|
struct PragmaSTDC_UnknownHandler : public PragmaHandler {
|
|
PragmaSTDC_UnknownHandler() {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &UnknownTok) override {
|
|
// 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") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &NameTok) override {
|
|
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);
|
|
}
|
|
};
|
|
|
|
/// PragmaAssumeNonNullHandler -
|
|
/// \#pragma clang assume_nonnull begin/end
|
|
struct PragmaAssumeNonNullHandler : public PragmaHandler {
|
|
PragmaAssumeNonNullHandler() : PragmaHandler("assume_nonnull") {}
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &NameTok) override {
|
|
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_assume_nonnull_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.getPragmaAssumeNonNullLoc();
|
|
|
|
// 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_assume_nonnull);
|
|
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_assume_nonnull);
|
|
return;
|
|
}
|
|
NewLoc = SourceLocation();
|
|
}
|
|
|
|
PP.setPragmaAssumeNonNullLoc(NewLoc);
|
|
}
|
|
};
|
|
|
|
/// \brief Handle "\#pragma region [...]"
|
|
///
|
|
/// The syntax is
|
|
/// \code
|
|
/// #pragma region [optional name]
|
|
/// #pragma endregion [optional comment]
|
|
/// \endcode
|
|
///
|
|
/// \note This is
|
|
/// <a href="http://msdn.microsoft.com/en-us/library/b6xkz944(v=vs.80).aspx">editor-only</a>
|
|
/// pragma, just skipped by compiler.
|
|
struct PragmaRegionHandler : public PragmaHandler {
|
|
PragmaRegionHandler(const char *pragma) : PragmaHandler(pragma) { }
|
|
|
|
void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
|
|
Token &NameTok) override {
|
|
// #pragma region: endregion matches can be verified
|
|
// __pragma(region): no sense, but ignored by msvc
|
|
// _Pragma is not valid for MSVC, but there isn't any point
|
|
// to handle a _Pragma differently.
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
/// RegisterBuiltinPragmas - Install the standard preprocessor pragmas:
|
|
/// \#pragma GCC poison/system_header/dependency and \#pragma once.
|
|
void Preprocessor::RegisterBuiltinPragmas() {
|
|
AddPragmaHandler(new PragmaOnceHandler());
|
|
AddPragmaHandler(new PragmaMarkHandler());
|
|
AddPragmaHandler(new PragmaPushMacroHandler());
|
|
AddPragmaHandler(new PragmaPopMacroHandler());
|
|
AddPragmaHandler(new PragmaMessageHandler(PPCallbacks::PMK_Message));
|
|
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// #pragma GCC ...
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AddPragmaHandler("GCC", new PragmaPoisonHandler());
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AddPragmaHandler("GCC", new PragmaSystemHeaderHandler());
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AddPragmaHandler("GCC", new PragmaDependencyHandler());
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AddPragmaHandler("GCC", new PragmaDiagnosticHandler("GCC"));
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AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Warning,
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"GCC"));
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AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Error,
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"GCC"));
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// #pragma clang ...
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AddPragmaHandler("clang", new PragmaPoisonHandler());
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AddPragmaHandler("clang", new PragmaSystemHeaderHandler());
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AddPragmaHandler("clang", new PragmaDebugHandler());
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AddPragmaHandler("clang", new PragmaDependencyHandler());
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AddPragmaHandler("clang", new PragmaDiagnosticHandler("clang"));
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AddPragmaHandler("clang", new PragmaARCCFCodeAuditedHandler());
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AddPragmaHandler("clang", new PragmaAssumeNonNullHandler());
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AddPragmaHandler("STDC", new PragmaSTDC_FENV_ACCESSHandler());
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AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler());
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AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler());
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// MS extensions.
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if (LangOpts.MicrosoftExt) {
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AddPragmaHandler(new PragmaWarningHandler());
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AddPragmaHandler(new PragmaIncludeAliasHandler());
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AddPragmaHandler(new PragmaRegionHandler("region"));
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AddPragmaHandler(new PragmaRegionHandler("endregion"));
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}
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// Pragmas added by plugins
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for (PragmaHandlerRegistry::iterator it = PragmaHandlerRegistry::begin(),
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ie = PragmaHandlerRegistry::end();
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it != ie; ++it) {
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AddPragmaHandler(it->instantiate().release());
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}
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}
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/// Ignore all pragmas, useful for modes such as -Eonly which would otherwise
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/// warn about those pragmas being unknown.
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void Preprocessor::IgnorePragmas() {
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AddPragmaHandler(new EmptyPragmaHandler());
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// Also ignore all pragmas in all namespaces created
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// in Preprocessor::RegisterBuiltinPragmas().
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AddPragmaHandler("GCC", new EmptyPragmaHandler());
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AddPragmaHandler("clang", new EmptyPragmaHandler());
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if (PragmaHandler *NS = PragmaHandlers->FindHandler("STDC")) {
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// Preprocessor::RegisterBuiltinPragmas() already registers
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// PragmaSTDC_UnknownHandler as the empty handler, so remove it first,
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// otherwise there will be an assert about a duplicate handler.
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PragmaNamespace *STDCNamespace = NS->getIfNamespace();
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assert(STDCNamespace &&
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"Invalid namespace, registered as a regular pragma handler!");
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if (PragmaHandler *Existing = STDCNamespace->FindHandler("", false)) {
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RemovePragmaHandler("STDC", Existing);
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delete Existing;
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}
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}
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AddPragmaHandler("STDC", new EmptyPragmaHandler());
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}
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