1875 lines
72 KiB
C++
1875 lines
72 KiB
C++
//===--- PPMacroExpansion.cpp - Top level Macro Expansion -----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the top level handling of macro expansion for the
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// preprocessor.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/Attributes.h"
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#include "clang/Basic/Builtins.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/LLVM.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/ObjCRuntime.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Lex/CodeCompletionHandler.h"
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#include "clang/Lex/DirectoryLookup.h"
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#include "clang/Lex/ExternalPreprocessorSource.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/MacroArgs.h"
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#include "clang/Lex/MacroInfo.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/PreprocessorOptions.h"
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#include "clang/Lex/Token.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/DenseSet.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/None.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/STLExtras.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/StringRef.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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#include <cstddef>
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#include <cstring>
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#include <ctime>
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#include <string>
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#include <tuple>
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#include <utility>
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using namespace clang;
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MacroDirective *
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Preprocessor::getLocalMacroDirectiveHistory(const IdentifierInfo *II) const {
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if (!II->hadMacroDefinition())
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return nullptr;
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auto Pos = CurSubmoduleState->Macros.find(II);
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return Pos == CurSubmoduleState->Macros.end() ? nullptr
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: Pos->second.getLatest();
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}
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void Preprocessor::appendMacroDirective(IdentifierInfo *II, MacroDirective *MD){
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assert(MD && "MacroDirective should be non-zero!");
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assert(!MD->getPrevious() && "Already attached to a MacroDirective history.");
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MacroState &StoredMD = CurSubmoduleState->Macros[II];
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auto *OldMD = StoredMD.getLatest();
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MD->setPrevious(OldMD);
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StoredMD.setLatest(MD);
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StoredMD.overrideActiveModuleMacros(*this, II);
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if (needModuleMacros()) {
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// Track that we created a new macro directive, so we know we should
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// consider building a ModuleMacro for it when we get to the end of
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// the module.
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PendingModuleMacroNames.push_back(II);
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}
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// Set up the identifier as having associated macro history.
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II->setHasMacroDefinition(true);
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if (!MD->isDefined() && LeafModuleMacros.find(II) == LeafModuleMacros.end())
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II->setHasMacroDefinition(false);
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if (II->isFromAST())
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II->setChangedSinceDeserialization();
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}
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void Preprocessor::setLoadedMacroDirective(IdentifierInfo *II,
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MacroDirective *ED,
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MacroDirective *MD) {
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// Normally, when a macro is defined, it goes through appendMacroDirective()
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// above, which chains a macro to previous defines, undefs, etc.
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// However, in a pch, the whole macro history up to the end of the pch is
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// stored, so ASTReader goes through this function instead.
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// However, built-in macros are already registered in the Preprocessor
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// ctor, and ASTWriter stops writing the macro chain at built-in macros,
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// so in that case the chain from the pch needs to be spliced to the existing
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// built-in.
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assert(II && MD);
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MacroState &StoredMD = CurSubmoduleState->Macros[II];
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if (auto *OldMD = StoredMD.getLatest()) {
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// shouldIgnoreMacro() in ASTWriter also stops at macros from the
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// predefines buffer in module builds. However, in module builds, modules
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// are loaded completely before predefines are processed, so StoredMD
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// will be nullptr for them when they're loaded. StoredMD should only be
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// non-nullptr for builtins read from a pch file.
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assert(OldMD->getMacroInfo()->isBuiltinMacro() &&
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"only built-ins should have an entry here");
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assert(!OldMD->getPrevious() && "builtin should only have a single entry");
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ED->setPrevious(OldMD);
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StoredMD.setLatest(MD);
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} else {
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StoredMD = MD;
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}
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// Setup the identifier as having associated macro history.
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II->setHasMacroDefinition(true);
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if (!MD->isDefined() && LeafModuleMacros.find(II) == LeafModuleMacros.end())
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II->setHasMacroDefinition(false);
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}
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ModuleMacro *Preprocessor::addModuleMacro(Module *Mod, IdentifierInfo *II,
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MacroInfo *Macro,
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ArrayRef<ModuleMacro *> Overrides,
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bool &New) {
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llvm::FoldingSetNodeID ID;
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ModuleMacro::Profile(ID, Mod, II);
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void *InsertPos;
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if (auto *MM = ModuleMacros.FindNodeOrInsertPos(ID, InsertPos)) {
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New = false;
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return MM;
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}
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auto *MM = ModuleMacro::create(*this, Mod, II, Macro, Overrides);
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ModuleMacros.InsertNode(MM, InsertPos);
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// Each overridden macro is now overridden by one more macro.
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bool HidAny = false;
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for (auto *O : Overrides) {
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HidAny |= (O->NumOverriddenBy == 0);
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++O->NumOverriddenBy;
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}
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// If we were the first overrider for any macro, it's no longer a leaf.
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auto &LeafMacros = LeafModuleMacros[II];
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if (HidAny) {
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LeafMacros.erase(std::remove_if(LeafMacros.begin(), LeafMacros.end(),
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[](ModuleMacro *MM) {
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return MM->NumOverriddenBy != 0;
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}),
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LeafMacros.end());
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}
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// The new macro is always a leaf macro.
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LeafMacros.push_back(MM);
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// The identifier now has defined macros (that may or may not be visible).
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II->setHasMacroDefinition(true);
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New = true;
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return MM;
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}
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ModuleMacro *Preprocessor::getModuleMacro(Module *Mod, IdentifierInfo *II) {
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llvm::FoldingSetNodeID ID;
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ModuleMacro::Profile(ID, Mod, II);
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void *InsertPos;
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return ModuleMacros.FindNodeOrInsertPos(ID, InsertPos);
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}
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void Preprocessor::updateModuleMacroInfo(const IdentifierInfo *II,
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ModuleMacroInfo &Info) {
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assert(Info.ActiveModuleMacrosGeneration !=
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CurSubmoduleState->VisibleModules.getGeneration() &&
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"don't need to update this macro name info");
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Info.ActiveModuleMacrosGeneration =
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CurSubmoduleState->VisibleModules.getGeneration();
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auto Leaf = LeafModuleMacros.find(II);
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if (Leaf == LeafModuleMacros.end()) {
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// No imported macros at all: nothing to do.
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return;
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}
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Info.ActiveModuleMacros.clear();
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// Every macro that's locally overridden is overridden by a visible macro.
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llvm::DenseMap<ModuleMacro *, int> NumHiddenOverrides;
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for (auto *O : Info.OverriddenMacros)
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NumHiddenOverrides[O] = -1;
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// Collect all macros that are not overridden by a visible macro.
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llvm::SmallVector<ModuleMacro *, 16> Worklist;
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for (auto *LeafMM : Leaf->second) {
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assert(LeafMM->getNumOverridingMacros() == 0 && "leaf macro overridden");
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if (NumHiddenOverrides.lookup(LeafMM) == 0)
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Worklist.push_back(LeafMM);
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}
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while (!Worklist.empty()) {
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auto *MM = Worklist.pop_back_val();
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if (CurSubmoduleState->VisibleModules.isVisible(MM->getOwningModule())) {
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// We only care about collecting definitions; undefinitions only act
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// to override other definitions.
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if (MM->getMacroInfo())
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Info.ActiveModuleMacros.push_back(MM);
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} else {
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for (auto *O : MM->overrides())
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if ((unsigned)++NumHiddenOverrides[O] == O->getNumOverridingMacros())
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Worklist.push_back(O);
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}
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}
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// Our reverse postorder walk found the macros in reverse order.
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std::reverse(Info.ActiveModuleMacros.begin(), Info.ActiveModuleMacros.end());
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// Determine whether the macro name is ambiguous.
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MacroInfo *MI = nullptr;
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bool IsSystemMacro = true;
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bool IsAmbiguous = false;
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if (auto *MD = Info.MD) {
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while (MD && isa<VisibilityMacroDirective>(MD))
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MD = MD->getPrevious();
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if (auto *DMD = dyn_cast_or_null<DefMacroDirective>(MD)) {
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MI = DMD->getInfo();
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IsSystemMacro &= SourceMgr.isInSystemHeader(DMD->getLocation());
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}
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}
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for (auto *Active : Info.ActiveModuleMacros) {
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auto *NewMI = Active->getMacroInfo();
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// Before marking the macro as ambiguous, check if this is a case where
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// both macros are in system headers. If so, we trust that the system
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// did not get it wrong. This also handles cases where Clang's own
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// headers have a different spelling of certain system macros:
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// #define LONG_MAX __LONG_MAX__ (clang's limits.h)
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// #define LONG_MAX 0x7fffffffffffffffL (system's limits.h)
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//
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// FIXME: Remove the defined-in-system-headers check. clang's limits.h
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// overrides the system limits.h's macros, so there's no conflict here.
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if (MI && NewMI != MI &&
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!MI->isIdenticalTo(*NewMI, *this, /*Syntactically=*/true))
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IsAmbiguous = true;
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IsSystemMacro &= Active->getOwningModule()->IsSystem ||
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SourceMgr.isInSystemHeader(NewMI->getDefinitionLoc());
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MI = NewMI;
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}
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Info.IsAmbiguous = IsAmbiguous && !IsSystemMacro;
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}
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void Preprocessor::dumpMacroInfo(const IdentifierInfo *II) {
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ArrayRef<ModuleMacro*> Leaf;
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auto LeafIt = LeafModuleMacros.find(II);
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if (LeafIt != LeafModuleMacros.end())
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Leaf = LeafIt->second;
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const MacroState *State = nullptr;
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auto Pos = CurSubmoduleState->Macros.find(II);
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if (Pos != CurSubmoduleState->Macros.end())
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State = &Pos->second;
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llvm::errs() << "MacroState " << State << " " << II->getNameStart();
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if (State && State->isAmbiguous(*this, II))
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llvm::errs() << " ambiguous";
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if (State && !State->getOverriddenMacros().empty()) {
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llvm::errs() << " overrides";
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for (auto *O : State->getOverriddenMacros())
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llvm::errs() << " " << O->getOwningModule()->getFullModuleName();
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}
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llvm::errs() << "\n";
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// Dump local macro directives.
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for (auto *MD = State ? State->getLatest() : nullptr; MD;
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MD = MD->getPrevious()) {
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llvm::errs() << " ";
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MD->dump();
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}
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// Dump module macros.
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llvm::DenseSet<ModuleMacro*> Active;
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for (auto *MM : State ? State->getActiveModuleMacros(*this, II) : None)
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Active.insert(MM);
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llvm::DenseSet<ModuleMacro*> Visited;
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llvm::SmallVector<ModuleMacro *, 16> Worklist(Leaf.begin(), Leaf.end());
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while (!Worklist.empty()) {
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auto *MM = Worklist.pop_back_val();
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llvm::errs() << " ModuleMacro " << MM << " "
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<< MM->getOwningModule()->getFullModuleName();
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if (!MM->getMacroInfo())
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llvm::errs() << " undef";
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if (Active.count(MM))
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llvm::errs() << " active";
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else if (!CurSubmoduleState->VisibleModules.isVisible(
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MM->getOwningModule()))
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llvm::errs() << " hidden";
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else if (MM->getMacroInfo())
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llvm::errs() << " overridden";
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if (!MM->overrides().empty()) {
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llvm::errs() << " overrides";
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for (auto *O : MM->overrides()) {
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llvm::errs() << " " << O->getOwningModule()->getFullModuleName();
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if (Visited.insert(O).second)
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Worklist.push_back(O);
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}
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}
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llvm::errs() << "\n";
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if (auto *MI = MM->getMacroInfo()) {
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llvm::errs() << " ";
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MI->dump();
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llvm::errs() << "\n";
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}
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}
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}
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/// RegisterBuiltinMacro - Register the specified identifier in the identifier
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/// table and mark it as a builtin macro to be expanded.
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static IdentifierInfo *RegisterBuiltinMacro(Preprocessor &PP, const char *Name){
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// Get the identifier.
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IdentifierInfo *Id = PP.getIdentifierInfo(Name);
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// Mark it as being a macro that is builtin.
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MacroInfo *MI = PP.AllocateMacroInfo(SourceLocation());
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MI->setIsBuiltinMacro();
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PP.appendDefMacroDirective(Id, MI);
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return Id;
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}
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/// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the
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/// identifier table.
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void Preprocessor::RegisterBuiltinMacros() {
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Ident__LINE__ = RegisterBuiltinMacro(*this, "__LINE__");
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Ident__FILE__ = RegisterBuiltinMacro(*this, "__FILE__");
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Ident__DATE__ = RegisterBuiltinMacro(*this, "__DATE__");
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Ident__TIME__ = RegisterBuiltinMacro(*this, "__TIME__");
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Ident__COUNTER__ = RegisterBuiltinMacro(*this, "__COUNTER__");
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Ident_Pragma = RegisterBuiltinMacro(*this, "_Pragma");
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// C++ Standing Document Extensions.
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if (getLangOpts().CPlusPlus)
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Ident__has_cpp_attribute =
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RegisterBuiltinMacro(*this, "__has_cpp_attribute");
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else
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Ident__has_cpp_attribute = nullptr;
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// GCC Extensions.
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Ident__BASE_FILE__ = RegisterBuiltinMacro(*this, "__BASE_FILE__");
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Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro(*this, "__INCLUDE_LEVEL__");
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Ident__TIMESTAMP__ = RegisterBuiltinMacro(*this, "__TIMESTAMP__");
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// Microsoft Extensions.
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if (getLangOpts().MicrosoftExt) {
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Ident__identifier = RegisterBuiltinMacro(*this, "__identifier");
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Ident__pragma = RegisterBuiltinMacro(*this, "__pragma");
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} else {
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Ident__identifier = nullptr;
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Ident__pragma = nullptr;
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}
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// Clang Extensions.
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Ident__FILE_NAME__ = RegisterBuiltinMacro(*this, "__FILE_NAME__");
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Ident__has_feature = RegisterBuiltinMacro(*this, "__has_feature");
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Ident__has_extension = RegisterBuiltinMacro(*this, "__has_extension");
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Ident__has_builtin = RegisterBuiltinMacro(*this, "__has_builtin");
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Ident__has_attribute = RegisterBuiltinMacro(*this, "__has_attribute");
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if (!getLangOpts().CPlusPlus)
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Ident__has_c_attribute = RegisterBuiltinMacro(*this, "__has_c_attribute");
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else
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Ident__has_c_attribute = nullptr;
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Ident__has_declspec = RegisterBuiltinMacro(*this, "__has_declspec_attribute");
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Ident__has_include = RegisterBuiltinMacro(*this, "__has_include");
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Ident__has_include_next = RegisterBuiltinMacro(*this, "__has_include_next");
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Ident__has_warning = RegisterBuiltinMacro(*this, "__has_warning");
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Ident__is_identifier = RegisterBuiltinMacro(*this, "__is_identifier");
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Ident__is_target_arch = RegisterBuiltinMacro(*this, "__is_target_arch");
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Ident__is_target_vendor = RegisterBuiltinMacro(*this, "__is_target_vendor");
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Ident__is_target_os = RegisterBuiltinMacro(*this, "__is_target_os");
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Ident__is_target_environment =
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RegisterBuiltinMacro(*this, "__is_target_environment");
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// Modules.
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Ident__building_module = RegisterBuiltinMacro(*this, "__building_module");
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if (!getLangOpts().CurrentModule.empty())
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Ident__MODULE__ = RegisterBuiltinMacro(*this, "__MODULE__");
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else
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Ident__MODULE__ = nullptr;
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}
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/// isTrivialSingleTokenExpansion - Return true if MI, which has a single token
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/// in its expansion, currently expands to that token literally.
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static bool isTrivialSingleTokenExpansion(const MacroInfo *MI,
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const IdentifierInfo *MacroIdent,
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Preprocessor &PP) {
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IdentifierInfo *II = MI->getReplacementToken(0).getIdentifierInfo();
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// If the token isn't an identifier, it's always literally expanded.
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if (!II) return true;
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// If the information about this identifier is out of date, update it from
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// the external source.
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if (II->isOutOfDate())
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PP.getExternalSource()->updateOutOfDateIdentifier(*II);
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// If the identifier is a macro, and if that macro is enabled, it may be
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// expanded so it's not a trivial expansion.
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if (auto *ExpansionMI = PP.getMacroInfo(II))
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if (ExpansionMI->isEnabled() &&
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// Fast expanding "#define X X" is ok, because X would be disabled.
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II != MacroIdent)
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return false;
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// If this is an object-like macro invocation, it is safe to trivially expand
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// it.
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if (MI->isObjectLike()) return true;
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// If this is a function-like macro invocation, it's safe to trivially expand
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// as long as the identifier is not a macro argument.
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return std::find(MI->param_begin(), MI->param_end(), II) == MI->param_end();
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}
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/// isNextPPTokenLParen - Determine whether the next preprocessor token to be
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/// lexed is a '('. If so, consume the token and return true, if not, this
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/// method should have no observable side-effect on the lexed tokens.
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bool Preprocessor::isNextPPTokenLParen() {
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// Do some quick tests for rejection cases.
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unsigned Val;
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if (CurLexer)
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Val = CurLexer->isNextPPTokenLParen();
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else
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Val = CurTokenLexer->isNextTokenLParen();
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if (Val == 2) {
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// We have run off the end. If it's a source file we don't
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// examine enclosing ones (C99 5.1.1.2p4). Otherwise walk up the
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// macro stack.
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if (CurPPLexer)
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return false;
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for (const IncludeStackInfo &Entry : llvm::reverse(IncludeMacroStack)) {
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if (Entry.TheLexer)
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Val = Entry.TheLexer->isNextPPTokenLParen();
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else
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Val = Entry.TheTokenLexer->isNextTokenLParen();
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if (Val != 2)
|
|
break;
|
|
|
|
// Ran off the end of a source file?
|
|
if (Entry.ThePPLexer)
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Okay, if we know that the token is a '(', lex it and return. Otherwise we
|
|
// have found something that isn't a '(' or we found the end of the
|
|
// translation unit. In either case, return false.
|
|
return Val == 1;
|
|
}
|
|
|
|
/// HandleMacroExpandedIdentifier - If an identifier token is read that is to be
|
|
/// expanded as a macro, handle it and return the next token as 'Identifier'.
|
|
bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier,
|
|
const MacroDefinition &M) {
|
|
MacroInfo *MI = M.getMacroInfo();
|
|
|
|
// If this is a macro expansion in the "#if !defined(x)" line for the file,
|
|
// then the macro could expand to different things in other contexts, we need
|
|
// to disable the optimization in this case.
|
|
if (CurPPLexer) CurPPLexer->MIOpt.ExpandedMacro();
|
|
|
|
// If this is a builtin macro, like __LINE__ or _Pragma, handle it specially.
|
|
if (MI->isBuiltinMacro()) {
|
|
if (Callbacks)
|
|
Callbacks->MacroExpands(Identifier, M, Identifier.getLocation(),
|
|
/*Args=*/nullptr);
|
|
ExpandBuiltinMacro(Identifier);
|
|
return true;
|
|
}
|
|
|
|
/// Args - If this is a function-like macro expansion, this contains,
|
|
/// for each macro argument, the list of tokens that were provided to the
|
|
/// invocation.
|
|
MacroArgs *Args = nullptr;
|
|
|
|
// Remember where the end of the expansion occurred. For an object-like
|
|
// macro, this is the identifier. For a function-like macro, this is the ')'.
|
|
SourceLocation ExpansionEnd = Identifier.getLocation();
|
|
|
|
// If this is a function-like macro, read the arguments.
|
|
if (MI->isFunctionLike()) {
|
|
// Remember that we are now parsing the arguments to a macro invocation.
|
|
// Preprocessor directives used inside macro arguments are not portable, and
|
|
// this enables the warning.
|
|
InMacroArgs = true;
|
|
ArgMacro = &Identifier;
|
|
|
|
Args = ReadMacroCallArgumentList(Identifier, MI, ExpansionEnd);
|
|
|
|
// Finished parsing args.
|
|
InMacroArgs = false;
|
|
ArgMacro = nullptr;
|
|
|
|
// If there was an error parsing the arguments, bail out.
|
|
if (!Args) return true;
|
|
|
|
++NumFnMacroExpanded;
|
|
} else {
|
|
++NumMacroExpanded;
|
|
}
|
|
|
|
// Notice that this macro has been used.
|
|
markMacroAsUsed(MI);
|
|
|
|
// Remember where the token is expanded.
|
|
SourceLocation ExpandLoc = Identifier.getLocation();
|
|
SourceRange ExpansionRange(ExpandLoc, ExpansionEnd);
|
|
|
|
if (Callbacks) {
|
|
if (InMacroArgs) {
|
|
// We can have macro expansion inside a conditional directive while
|
|
// reading the function macro arguments. To ensure, in that case, that
|
|
// MacroExpands callbacks still happen in source order, queue this
|
|
// callback to have it happen after the function macro callback.
|
|
DelayedMacroExpandsCallbacks.push_back(
|
|
MacroExpandsInfo(Identifier, M, ExpansionRange));
|
|
} else {
|
|
Callbacks->MacroExpands(Identifier, M, ExpansionRange, Args);
|
|
if (!DelayedMacroExpandsCallbacks.empty()) {
|
|
for (const MacroExpandsInfo &Info : DelayedMacroExpandsCallbacks) {
|
|
// FIXME: We lose macro args info with delayed callback.
|
|
Callbacks->MacroExpands(Info.Tok, Info.MD, Info.Range,
|
|
/*Args=*/nullptr);
|
|
}
|
|
DelayedMacroExpandsCallbacks.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the macro definition is ambiguous, complain.
|
|
if (M.isAmbiguous()) {
|
|
Diag(Identifier, diag::warn_pp_ambiguous_macro)
|
|
<< Identifier.getIdentifierInfo();
|
|
Diag(MI->getDefinitionLoc(), diag::note_pp_ambiguous_macro_chosen)
|
|
<< Identifier.getIdentifierInfo();
|
|
M.forAllDefinitions([&](const MacroInfo *OtherMI) {
|
|
if (OtherMI != MI)
|
|
Diag(OtherMI->getDefinitionLoc(), diag::note_pp_ambiguous_macro_other)
|
|
<< Identifier.getIdentifierInfo();
|
|
});
|
|
}
|
|
|
|
// If we started lexing a macro, enter the macro expansion body.
|
|
|
|
// If this macro expands to no tokens, don't bother to push it onto the
|
|
// expansion stack, only to take it right back off.
|
|
if (MI->getNumTokens() == 0) {
|
|
// No need for arg info.
|
|
if (Args) Args->destroy(*this);
|
|
|
|
// Propagate whitespace info as if we had pushed, then popped,
|
|
// a macro context.
|
|
Identifier.setFlag(Token::LeadingEmptyMacro);
|
|
PropagateLineStartLeadingSpaceInfo(Identifier);
|
|
++NumFastMacroExpanded;
|
|
return false;
|
|
} else if (MI->getNumTokens() == 1 &&
|
|
isTrivialSingleTokenExpansion(MI, Identifier.getIdentifierInfo(),
|
|
*this)) {
|
|
// Otherwise, if this macro expands into a single trivially-expanded
|
|
// token: expand it now. This handles common cases like
|
|
// "#define VAL 42".
|
|
|
|
// No need for arg info.
|
|
if (Args) Args->destroy(*this);
|
|
|
|
// Propagate the isAtStartOfLine/hasLeadingSpace markers of the macro
|
|
// identifier to the expanded token.
|
|
bool isAtStartOfLine = Identifier.isAtStartOfLine();
|
|
bool hasLeadingSpace = Identifier.hasLeadingSpace();
|
|
|
|
// Replace the result token.
|
|
Identifier = MI->getReplacementToken(0);
|
|
|
|
// Restore the StartOfLine/LeadingSpace markers.
|
|
Identifier.setFlagValue(Token::StartOfLine , isAtStartOfLine);
|
|
Identifier.setFlagValue(Token::LeadingSpace, hasLeadingSpace);
|
|
|
|
// Update the tokens location to include both its expansion and physical
|
|
// locations.
|
|
SourceLocation Loc =
|
|
SourceMgr.createExpansionLoc(Identifier.getLocation(), ExpandLoc,
|
|
ExpansionEnd,Identifier.getLength());
|
|
Identifier.setLocation(Loc);
|
|
|
|
// If this is a disabled macro or #define X X, we must mark the result as
|
|
// unexpandable.
|
|
if (IdentifierInfo *NewII = Identifier.getIdentifierInfo()) {
|
|
if (MacroInfo *NewMI = getMacroInfo(NewII))
|
|
if (!NewMI->isEnabled() || NewMI == MI) {
|
|
Identifier.setFlag(Token::DisableExpand);
|
|
// Don't warn for "#define X X" like "#define bool bool" from
|
|
// stdbool.h.
|
|
if (NewMI != MI || MI->isFunctionLike())
|
|
Diag(Identifier, diag::pp_disabled_macro_expansion);
|
|
}
|
|
}
|
|
|
|
// Since this is not an identifier token, it can't be macro expanded, so
|
|
// we're done.
|
|
++NumFastMacroExpanded;
|
|
return true;
|
|
}
|
|
|
|
// Start expanding the macro.
|
|
EnterMacro(Identifier, ExpansionEnd, MI, Args);
|
|
return false;
|
|
}
|
|
|
|
enum Bracket {
|
|
Brace,
|
|
Paren
|
|
};
|
|
|
|
/// CheckMatchedBrackets - Returns true if the braces and parentheses in the
|
|
/// token vector are properly nested.
|
|
static bool CheckMatchedBrackets(const SmallVectorImpl<Token> &Tokens) {
|
|
SmallVector<Bracket, 8> Brackets;
|
|
for (SmallVectorImpl<Token>::const_iterator I = Tokens.begin(),
|
|
E = Tokens.end();
|
|
I != E; ++I) {
|
|
if (I->is(tok::l_paren)) {
|
|
Brackets.push_back(Paren);
|
|
} else if (I->is(tok::r_paren)) {
|
|
if (Brackets.empty() || Brackets.back() == Brace)
|
|
return false;
|
|
Brackets.pop_back();
|
|
} else if (I->is(tok::l_brace)) {
|
|
Brackets.push_back(Brace);
|
|
} else if (I->is(tok::r_brace)) {
|
|
if (Brackets.empty() || Brackets.back() == Paren)
|
|
return false;
|
|
Brackets.pop_back();
|
|
}
|
|
}
|
|
return Brackets.empty();
|
|
}
|
|
|
|
/// GenerateNewArgTokens - Returns true if OldTokens can be converted to a new
|
|
/// vector of tokens in NewTokens. The new number of arguments will be placed
|
|
/// in NumArgs and the ranges which need to surrounded in parentheses will be
|
|
/// in ParenHints.
|
|
/// Returns false if the token stream cannot be changed. If this is because
|
|
/// of an initializer list starting a macro argument, the range of those
|
|
/// initializer lists will be place in InitLists.
|
|
static bool GenerateNewArgTokens(Preprocessor &PP,
|
|
SmallVectorImpl<Token> &OldTokens,
|
|
SmallVectorImpl<Token> &NewTokens,
|
|
unsigned &NumArgs,
|
|
SmallVectorImpl<SourceRange> &ParenHints,
|
|
SmallVectorImpl<SourceRange> &InitLists) {
|
|
if (!CheckMatchedBrackets(OldTokens))
|
|
return false;
|
|
|
|
// Once it is known that the brackets are matched, only a simple count of the
|
|
// braces is needed.
|
|
unsigned Braces = 0;
|
|
|
|
// First token of a new macro argument.
|
|
SmallVectorImpl<Token>::iterator ArgStartIterator = OldTokens.begin();
|
|
|
|
// First closing brace in a new macro argument. Used to generate
|
|
// SourceRanges for InitLists.
|
|
SmallVectorImpl<Token>::iterator ClosingBrace = OldTokens.end();
|
|
NumArgs = 0;
|
|
Token TempToken;
|
|
// Set to true when a macro separator token is found inside a braced list.
|
|
// If true, the fixed argument spans multiple old arguments and ParenHints
|
|
// will be updated.
|
|
bool FoundSeparatorToken = false;
|
|
for (SmallVectorImpl<Token>::iterator I = OldTokens.begin(),
|
|
E = OldTokens.end();
|
|
I != E; ++I) {
|
|
if (I->is(tok::l_brace)) {
|
|
++Braces;
|
|
} else if (I->is(tok::r_brace)) {
|
|
--Braces;
|
|
if (Braces == 0 && ClosingBrace == E && FoundSeparatorToken)
|
|
ClosingBrace = I;
|
|
} else if (I->is(tok::eof)) {
|
|
// EOF token is used to separate macro arguments
|
|
if (Braces != 0) {
|
|
// Assume comma separator is actually braced list separator and change
|
|
// it back to a comma.
|
|
FoundSeparatorToken = true;
|
|
I->setKind(tok::comma);
|
|
I->setLength(1);
|
|
} else { // Braces == 0
|
|
// Separator token still separates arguments.
|
|
++NumArgs;
|
|
|
|
// If the argument starts with a brace, it can't be fixed with
|
|
// parentheses. A different diagnostic will be given.
|
|
if (FoundSeparatorToken && ArgStartIterator->is(tok::l_brace)) {
|
|
InitLists.push_back(
|
|
SourceRange(ArgStartIterator->getLocation(),
|
|
PP.getLocForEndOfToken(ClosingBrace->getLocation())));
|
|
ClosingBrace = E;
|
|
}
|
|
|
|
// Add left paren
|
|
if (FoundSeparatorToken) {
|
|
TempToken.startToken();
|
|
TempToken.setKind(tok::l_paren);
|
|
TempToken.setLocation(ArgStartIterator->getLocation());
|
|
TempToken.setLength(0);
|
|
NewTokens.push_back(TempToken);
|
|
}
|
|
|
|
// Copy over argument tokens
|
|
NewTokens.insert(NewTokens.end(), ArgStartIterator, I);
|
|
|
|
// Add right paren and store the paren locations in ParenHints
|
|
if (FoundSeparatorToken) {
|
|
SourceLocation Loc = PP.getLocForEndOfToken((I - 1)->getLocation());
|
|
TempToken.startToken();
|
|
TempToken.setKind(tok::r_paren);
|
|
TempToken.setLocation(Loc);
|
|
TempToken.setLength(0);
|
|
NewTokens.push_back(TempToken);
|
|
ParenHints.push_back(SourceRange(ArgStartIterator->getLocation(),
|
|
Loc));
|
|
}
|
|
|
|
// Copy separator token
|
|
NewTokens.push_back(*I);
|
|
|
|
// Reset values
|
|
ArgStartIterator = I + 1;
|
|
FoundSeparatorToken = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return !ParenHints.empty() && InitLists.empty();
|
|
}
|
|
|
|
/// ReadFunctionLikeMacroArgs - After reading "MACRO" and knowing that the next
|
|
/// token is the '(' of the macro, this method is invoked to read all of the
|
|
/// actual arguments specified for the macro invocation. This returns null on
|
|
/// error.
|
|
MacroArgs *Preprocessor::ReadMacroCallArgumentList(Token &MacroName,
|
|
MacroInfo *MI,
|
|
SourceLocation &MacroEnd) {
|
|
// The number of fixed arguments to parse.
|
|
unsigned NumFixedArgsLeft = MI->getNumParams();
|
|
bool isVariadic = MI->isVariadic();
|
|
|
|
// Outer loop, while there are more arguments, keep reading them.
|
|
Token Tok;
|
|
|
|
// Read arguments as unexpanded tokens. This avoids issues, e.g., where
|
|
// an argument value in a macro could expand to ',' or '(' or ')'.
|
|
LexUnexpandedToken(Tok);
|
|
assert(Tok.is(tok::l_paren) && "Error computing l-paren-ness?");
|
|
|
|
// ArgTokens - Build up a list of tokens that make up each argument. Each
|
|
// argument is separated by an EOF token. Use a SmallVector so we can avoid
|
|
// heap allocations in the common case.
|
|
SmallVector<Token, 64> ArgTokens;
|
|
bool ContainsCodeCompletionTok = false;
|
|
bool FoundElidedComma = false;
|
|
|
|
SourceLocation TooManyArgsLoc;
|
|
|
|
unsigned NumActuals = 0;
|
|
while (Tok.isNot(tok::r_paren)) {
|
|
if (ContainsCodeCompletionTok && Tok.isOneOf(tok::eof, tok::eod))
|
|
break;
|
|
|
|
assert(Tok.isOneOf(tok::l_paren, tok::comma) &&
|
|
"only expect argument separators here");
|
|
|
|
size_t ArgTokenStart = ArgTokens.size();
|
|
SourceLocation ArgStartLoc = Tok.getLocation();
|
|
|
|
// C99 6.10.3p11: Keep track of the number of l_parens we have seen. Note
|
|
// that we already consumed the first one.
|
|
unsigned NumParens = 0;
|
|
|
|
while (true) {
|
|
// Read arguments as unexpanded tokens. This avoids issues, e.g., where
|
|
// an argument value in a macro could expand to ',' or '(' or ')'.
|
|
LexUnexpandedToken(Tok);
|
|
|
|
if (Tok.isOneOf(tok::eof, tok::eod)) { // "#if f(<eof>" & "#if f(\n"
|
|
if (!ContainsCodeCompletionTok) {
|
|
Diag(MacroName, diag::err_unterm_macro_invoc);
|
|
Diag(MI->getDefinitionLoc(), diag::note_macro_here)
|
|
<< MacroName.getIdentifierInfo();
|
|
// Do not lose the EOF/EOD. Return it to the client.
|
|
MacroName = Tok;
|
|
return nullptr;
|
|
}
|
|
// Do not lose the EOF/EOD.
|
|
auto Toks = std::make_unique<Token[]>(1);
|
|
Toks[0] = Tok;
|
|
EnterTokenStream(std::move(Toks), 1, true, /*IsReinject*/ false);
|
|
break;
|
|
} else if (Tok.is(tok::r_paren)) {
|
|
// If we found the ) token, the macro arg list is done.
|
|
if (NumParens-- == 0) {
|
|
MacroEnd = Tok.getLocation();
|
|
if (!ArgTokens.empty() &&
|
|
ArgTokens.back().commaAfterElided()) {
|
|
FoundElidedComma = true;
|
|
}
|
|
break;
|
|
}
|
|
} else if (Tok.is(tok::l_paren)) {
|
|
++NumParens;
|
|
} else if (Tok.is(tok::comma)) {
|
|
// In Microsoft-compatibility mode, single commas from nested macro
|
|
// expansions should not be considered as argument separators. We test
|
|
// for this with the IgnoredComma token flag.
|
|
if (Tok.getFlags() & Token::IgnoredComma) {
|
|
// However, in MSVC's preprocessor, subsequent expansions do treat
|
|
// these commas as argument separators. This leads to a common
|
|
// workaround used in macros that need to work in both MSVC and
|
|
// compliant preprocessors. Therefore, the IgnoredComma flag can only
|
|
// apply once to any given token.
|
|
Tok.clearFlag(Token::IgnoredComma);
|
|
} else if (NumParens == 0) {
|
|
// Comma ends this argument if there are more fixed arguments
|
|
// expected. However, if this is a variadic macro, and this is part of
|
|
// the variadic part, then the comma is just an argument token.
|
|
if (!isVariadic)
|
|
break;
|
|
if (NumFixedArgsLeft > 1)
|
|
break;
|
|
}
|
|
} else if (Tok.is(tok::comment) && !KeepMacroComments) {
|
|
// If this is a comment token in the argument list and we're just in
|
|
// -C mode (not -CC mode), discard the comment.
|
|
continue;
|
|
} else if (!Tok.isAnnotation() && Tok.getIdentifierInfo() != nullptr) {
|
|
// Reading macro arguments can cause macros that we are currently
|
|
// expanding from to be popped off the expansion stack. Doing so causes
|
|
// them to be reenabled for expansion. Here we record whether any
|
|
// identifiers we lex as macro arguments correspond to disabled macros.
|
|
// If so, we mark the token as noexpand. This is a subtle aspect of
|
|
// C99 6.10.3.4p2.
|
|
if (MacroInfo *MI = getMacroInfo(Tok.getIdentifierInfo()))
|
|
if (!MI->isEnabled())
|
|
Tok.setFlag(Token::DisableExpand);
|
|
} else if (Tok.is(tok::code_completion)) {
|
|
ContainsCodeCompletionTok = true;
|
|
if (CodeComplete)
|
|
CodeComplete->CodeCompleteMacroArgument(MacroName.getIdentifierInfo(),
|
|
MI, NumActuals);
|
|
// Don't mark that we reached the code-completion point because the
|
|
// parser is going to handle the token and there will be another
|
|
// code-completion callback.
|
|
}
|
|
|
|
ArgTokens.push_back(Tok);
|
|
}
|
|
|
|
// If this was an empty argument list foo(), don't add this as an empty
|
|
// argument.
|
|
if (ArgTokens.empty() && Tok.getKind() == tok::r_paren)
|
|
break;
|
|
|
|
// If this is not a variadic macro, and too many args were specified, emit
|
|
// an error.
|
|
if (!isVariadic && NumFixedArgsLeft == 0 && TooManyArgsLoc.isInvalid()) {
|
|
if (ArgTokens.size() != ArgTokenStart)
|
|
TooManyArgsLoc = ArgTokens[ArgTokenStart].getLocation();
|
|
else
|
|
TooManyArgsLoc = ArgStartLoc;
|
|
}
|
|
|
|
// Empty arguments are standard in C99 and C++0x, and are supported as an
|
|
// extension in other modes.
|
|
if (ArgTokens.size() == ArgTokenStart && !getLangOpts().C99)
|
|
Diag(Tok, getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_empty_fnmacro_arg
|
|
: diag::ext_empty_fnmacro_arg);
|
|
|
|
// Add a marker EOF token to the end of the token list for this argument.
|
|
Token EOFTok;
|
|
EOFTok.startToken();
|
|
EOFTok.setKind(tok::eof);
|
|
EOFTok.setLocation(Tok.getLocation());
|
|
EOFTok.setLength(0);
|
|
ArgTokens.push_back(EOFTok);
|
|
++NumActuals;
|
|
if (!ContainsCodeCompletionTok && NumFixedArgsLeft != 0)
|
|
--NumFixedArgsLeft;
|
|
}
|
|
|
|
// Okay, we either found the r_paren. Check to see if we parsed too few
|
|
// arguments.
|
|
unsigned MinArgsExpected = MI->getNumParams();
|
|
|
|
// If this is not a variadic macro, and too many args were specified, emit
|
|
// an error.
|
|
if (!isVariadic && NumActuals > MinArgsExpected &&
|
|
!ContainsCodeCompletionTok) {
|
|
// Emit the diagnostic at the macro name in case there is a missing ).
|
|
// Emitting it at the , could be far away from the macro name.
|
|
Diag(TooManyArgsLoc, diag::err_too_many_args_in_macro_invoc);
|
|
Diag(MI->getDefinitionLoc(), diag::note_macro_here)
|
|
<< MacroName.getIdentifierInfo();
|
|
|
|
// Commas from braced initializer lists will be treated as argument
|
|
// separators inside macros. Attempt to correct for this with parentheses.
|
|
// TODO: See if this can be generalized to angle brackets for templates
|
|
// inside macro arguments.
|
|
|
|
SmallVector<Token, 4> FixedArgTokens;
|
|
unsigned FixedNumArgs = 0;
|
|
SmallVector<SourceRange, 4> ParenHints, InitLists;
|
|
if (!GenerateNewArgTokens(*this, ArgTokens, FixedArgTokens, FixedNumArgs,
|
|
ParenHints, InitLists)) {
|
|
if (!InitLists.empty()) {
|
|
DiagnosticBuilder DB =
|
|
Diag(MacroName,
|
|
diag::note_init_list_at_beginning_of_macro_argument);
|
|
for (SourceRange Range : InitLists)
|
|
DB << Range;
|
|
}
|
|
return nullptr;
|
|
}
|
|
if (FixedNumArgs != MinArgsExpected)
|
|
return nullptr;
|
|
|
|
DiagnosticBuilder DB = Diag(MacroName, diag::note_suggest_parens_for_macro);
|
|
for (SourceRange ParenLocation : ParenHints) {
|
|
DB << FixItHint::CreateInsertion(ParenLocation.getBegin(), "(");
|
|
DB << FixItHint::CreateInsertion(ParenLocation.getEnd(), ")");
|
|
}
|
|
ArgTokens.swap(FixedArgTokens);
|
|
NumActuals = FixedNumArgs;
|
|
}
|
|
|
|
// See MacroArgs instance var for description of this.
|
|
bool isVarargsElided = false;
|
|
|
|
if (ContainsCodeCompletionTok) {
|
|
// Recover from not-fully-formed macro invocation during code-completion.
|
|
Token EOFTok;
|
|
EOFTok.startToken();
|
|
EOFTok.setKind(tok::eof);
|
|
EOFTok.setLocation(Tok.getLocation());
|
|
EOFTok.setLength(0);
|
|
for (; NumActuals < MinArgsExpected; ++NumActuals)
|
|
ArgTokens.push_back(EOFTok);
|
|
}
|
|
|
|
if (NumActuals < MinArgsExpected) {
|
|
// There are several cases where too few arguments is ok, handle them now.
|
|
if (NumActuals == 0 && MinArgsExpected == 1) {
|
|
// #define A(X) or #define A(...) ---> A()
|
|
|
|
// If there is exactly one argument, and that argument is missing,
|
|
// then we have an empty "()" argument empty list. This is fine, even if
|
|
// the macro expects one argument (the argument is just empty).
|
|
isVarargsElided = MI->isVariadic();
|
|
} else if ((FoundElidedComma || MI->isVariadic()) &&
|
|
(NumActuals+1 == MinArgsExpected || // A(x, ...) -> A(X)
|
|
(NumActuals == 0 && MinArgsExpected == 2))) {// A(x,...) -> A()
|
|
// Varargs where the named vararg parameter is missing: OK as extension.
|
|
// #define A(x, ...)
|
|
// A("blah")
|
|
//
|
|
// If the macro contains the comma pasting extension, the diagnostic
|
|
// is suppressed; we know we'll get another diagnostic later.
|
|
if (!MI->hasCommaPasting()) {
|
|
Diag(Tok, diag::ext_missing_varargs_arg);
|
|
Diag(MI->getDefinitionLoc(), diag::note_macro_here)
|
|
<< MacroName.getIdentifierInfo();
|
|
}
|
|
|
|
// Remember this occurred, allowing us to elide the comma when used for
|
|
// cases like:
|
|
// #define A(x, foo...) blah(a, ## foo)
|
|
// #define B(x, ...) blah(a, ## __VA_ARGS__)
|
|
// #define C(...) blah(a, ## __VA_ARGS__)
|
|
// A(x) B(x) C()
|
|
isVarargsElided = true;
|
|
} else if (!ContainsCodeCompletionTok) {
|
|
// Otherwise, emit the error.
|
|
Diag(Tok, diag::err_too_few_args_in_macro_invoc);
|
|
Diag(MI->getDefinitionLoc(), diag::note_macro_here)
|
|
<< MacroName.getIdentifierInfo();
|
|
return nullptr;
|
|
}
|
|
|
|
// Add a marker EOF token to the end of the token list for this argument.
|
|
SourceLocation EndLoc = Tok.getLocation();
|
|
Tok.startToken();
|
|
Tok.setKind(tok::eof);
|
|
Tok.setLocation(EndLoc);
|
|
Tok.setLength(0);
|
|
ArgTokens.push_back(Tok);
|
|
|
|
// If we expect two arguments, add both as empty.
|
|
if (NumActuals == 0 && MinArgsExpected == 2)
|
|
ArgTokens.push_back(Tok);
|
|
|
|
} else if (NumActuals > MinArgsExpected && !MI->isVariadic() &&
|
|
!ContainsCodeCompletionTok) {
|
|
// Emit the diagnostic at the macro name in case there is a missing ).
|
|
// Emitting it at the , could be far away from the macro name.
|
|
Diag(MacroName, diag::err_too_many_args_in_macro_invoc);
|
|
Diag(MI->getDefinitionLoc(), diag::note_macro_here)
|
|
<< MacroName.getIdentifierInfo();
|
|
return nullptr;
|
|
}
|
|
|
|
return MacroArgs::create(MI, ArgTokens, isVarargsElided, *this);
|
|
}
|
|
|
|
/// Keeps macro expanded tokens for TokenLexers.
|
|
//
|
|
/// Works like a stack; a TokenLexer adds the macro expanded tokens that is
|
|
/// going to lex in the cache and when it finishes the tokens are removed
|
|
/// from the end of the cache.
|
|
Token *Preprocessor::cacheMacroExpandedTokens(TokenLexer *tokLexer,
|
|
ArrayRef<Token> tokens) {
|
|
assert(tokLexer);
|
|
if (tokens.empty())
|
|
return nullptr;
|
|
|
|
size_t newIndex = MacroExpandedTokens.size();
|
|
bool cacheNeedsToGrow = tokens.size() >
|
|
MacroExpandedTokens.capacity()-MacroExpandedTokens.size();
|
|
MacroExpandedTokens.append(tokens.begin(), tokens.end());
|
|
|
|
if (cacheNeedsToGrow) {
|
|
// Go through all the TokenLexers whose 'Tokens' pointer points in the
|
|
// buffer and update the pointers to the (potential) new buffer array.
|
|
for (const auto &Lexer : MacroExpandingLexersStack) {
|
|
TokenLexer *prevLexer;
|
|
size_t tokIndex;
|
|
std::tie(prevLexer, tokIndex) = Lexer;
|
|
prevLexer->Tokens = MacroExpandedTokens.data() + tokIndex;
|
|
}
|
|
}
|
|
|
|
MacroExpandingLexersStack.push_back(std::make_pair(tokLexer, newIndex));
|
|
return MacroExpandedTokens.data() + newIndex;
|
|
}
|
|
|
|
void Preprocessor::removeCachedMacroExpandedTokensOfLastLexer() {
|
|
assert(!MacroExpandingLexersStack.empty());
|
|
size_t tokIndex = MacroExpandingLexersStack.back().second;
|
|
assert(tokIndex < MacroExpandedTokens.size());
|
|
// Pop the cached macro expanded tokens from the end.
|
|
MacroExpandedTokens.resize(tokIndex);
|
|
MacroExpandingLexersStack.pop_back();
|
|
}
|
|
|
|
/// ComputeDATE_TIME - Compute the current time, enter it into the specified
|
|
/// scratch buffer, then return DATELoc/TIMELoc locations with the position of
|
|
/// the identifier tokens inserted.
|
|
static void ComputeDATE_TIME(SourceLocation &DATELoc, SourceLocation &TIMELoc,
|
|
Preprocessor &PP) {
|
|
time_t TT = time(nullptr);
|
|
struct tm *TM = localtime(&TT);
|
|
|
|
static const char * const Months[] = {
|
|
"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
|
|
};
|
|
|
|
{
|
|
SmallString<32> TmpBuffer;
|
|
llvm::raw_svector_ostream TmpStream(TmpBuffer);
|
|
TmpStream << llvm::format("\"%s %2d %4d\"", Months[TM->tm_mon],
|
|
TM->tm_mday, TM->tm_year + 1900);
|
|
Token TmpTok;
|
|
TmpTok.startToken();
|
|
PP.CreateString(TmpStream.str(), TmpTok);
|
|
DATELoc = TmpTok.getLocation();
|
|
}
|
|
|
|
{
|
|
SmallString<32> TmpBuffer;
|
|
llvm::raw_svector_ostream TmpStream(TmpBuffer);
|
|
TmpStream << llvm::format("\"%02d:%02d:%02d\"",
|
|
TM->tm_hour, TM->tm_min, TM->tm_sec);
|
|
Token TmpTok;
|
|
TmpTok.startToken();
|
|
PP.CreateString(TmpStream.str(), TmpTok);
|
|
TIMELoc = TmpTok.getLocation();
|
|
}
|
|
}
|
|
|
|
/// HasFeature - Return true if we recognize and implement the feature
|
|
/// specified by the identifier as a standard language feature.
|
|
static bool HasFeature(const Preprocessor &PP, StringRef Feature) {
|
|
const LangOptions &LangOpts = PP.getLangOpts();
|
|
|
|
// Normalize the feature name, __foo__ becomes foo.
|
|
if (Feature.startswith("__") && Feature.endswith("__") && Feature.size() >= 4)
|
|
Feature = Feature.substr(2, Feature.size() - 4);
|
|
|
|
#define FEATURE(Name, Predicate) .Case(#Name, Predicate)
|
|
return llvm::StringSwitch<bool>(Feature)
|
|
#include "clang/Basic/Features.def"
|
|
.Default(false);
|
|
#undef FEATURE
|
|
}
|
|
|
|
/// HasExtension - Return true if we recognize and implement the feature
|
|
/// specified by the identifier, either as an extension or a standard language
|
|
/// feature.
|
|
static bool HasExtension(const Preprocessor &PP, StringRef Extension) {
|
|
if (HasFeature(PP, Extension))
|
|
return true;
|
|
|
|
// If the use of an extension results in an error diagnostic, extensions are
|
|
// effectively unavailable, so just return false here.
|
|
if (PP.getDiagnostics().getExtensionHandlingBehavior() >=
|
|
diag::Severity::Error)
|
|
return false;
|
|
|
|
const LangOptions &LangOpts = PP.getLangOpts();
|
|
|
|
// Normalize the extension name, __foo__ becomes foo.
|
|
if (Extension.startswith("__") && Extension.endswith("__") &&
|
|
Extension.size() >= 4)
|
|
Extension = Extension.substr(2, Extension.size() - 4);
|
|
|
|
// Because we inherit the feature list from HasFeature, this string switch
|
|
// must be less restrictive than HasFeature's.
|
|
#define EXTENSION(Name, Predicate) .Case(#Name, Predicate)
|
|
return llvm::StringSwitch<bool>(Extension)
|
|
#include "clang/Basic/Features.def"
|
|
.Default(false);
|
|
#undef EXTENSION
|
|
}
|
|
|
|
/// EvaluateHasIncludeCommon - Process a '__has_include("path")'
|
|
/// or '__has_include_next("path")' expression.
|
|
/// Returns true if successful.
|
|
static bool EvaluateHasIncludeCommon(Token &Tok,
|
|
IdentifierInfo *II, Preprocessor &PP,
|
|
const DirectoryLookup *LookupFrom,
|
|
const FileEntry *LookupFromFile) {
|
|
// Save the location of the current token. If a '(' is later found, use
|
|
// that location. If not, use the end of this location instead.
|
|
SourceLocation LParenLoc = Tok.getLocation();
|
|
|
|
// These expressions are only allowed within a preprocessor directive.
|
|
if (!PP.isParsingIfOrElifDirective()) {
|
|
PP.Diag(LParenLoc, diag::err_pp_directive_required) << II;
|
|
// Return a valid identifier token.
|
|
assert(Tok.is(tok::identifier));
|
|
Tok.setIdentifierInfo(II);
|
|
return false;
|
|
}
|
|
|
|
// Get '('. If we don't have a '(', try to form a header-name token.
|
|
do {
|
|
if (PP.LexHeaderName(Tok))
|
|
return false;
|
|
} while (Tok.getKind() == tok::comment);
|
|
|
|
// Ensure we have a '('.
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
// No '(', use end of last token.
|
|
LParenLoc = PP.getLocForEndOfToken(LParenLoc);
|
|
PP.Diag(LParenLoc, diag::err_pp_expected_after) << II << tok::l_paren;
|
|
// If the next token looks like a filename or the start of one,
|
|
// assume it is and process it as such.
|
|
if (Tok.isNot(tok::header_name))
|
|
return false;
|
|
} else {
|
|
// Save '(' location for possible missing ')' message.
|
|
LParenLoc = Tok.getLocation();
|
|
if (PP.LexHeaderName(Tok))
|
|
return false;
|
|
}
|
|
|
|
if (Tok.isNot(tok::header_name)) {
|
|
PP.Diag(Tok.getLocation(), diag::err_pp_expects_filename);
|
|
return false;
|
|
}
|
|
|
|
// Reserve a buffer to get the spelling.
|
|
SmallString<128> FilenameBuffer;
|
|
bool Invalid = false;
|
|
StringRef Filename = PP.getSpelling(Tok, FilenameBuffer, &Invalid);
|
|
if (Invalid)
|
|
return false;
|
|
|
|
SourceLocation FilenameLoc = Tok.getLocation();
|
|
|
|
// Get ')'.
|
|
PP.LexNonComment(Tok);
|
|
|
|
// Ensure we have a trailing ).
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
PP.Diag(PP.getLocForEndOfToken(FilenameLoc), diag::err_pp_expected_after)
|
|
<< II << tok::r_paren;
|
|
PP.Diag(LParenLoc, diag::note_matching) << tok::l_paren;
|
|
return false;
|
|
}
|
|
|
|
bool isAngled = PP.GetIncludeFilenameSpelling(Tok.getLocation(), Filename);
|
|
// If GetIncludeFilenameSpelling set the start ptr to null, there was an
|
|
// error.
|
|
if (Filename.empty())
|
|
return false;
|
|
|
|
// Search include directories.
|
|
const DirectoryLookup *CurDir;
|
|
Optional<FileEntryRef> File =
|
|
PP.LookupFile(FilenameLoc, Filename, isAngled, LookupFrom, LookupFromFile,
|
|
CurDir, nullptr, nullptr, nullptr, nullptr, nullptr);
|
|
|
|
if (PPCallbacks *Callbacks = PP.getPPCallbacks()) {
|
|
SrcMgr::CharacteristicKind FileType = SrcMgr::C_User;
|
|
if (File)
|
|
FileType =
|
|
PP.getHeaderSearchInfo().getFileDirFlavor(&File->getFileEntry());
|
|
Callbacks->HasInclude(FilenameLoc, Filename, isAngled, File, FileType);
|
|
}
|
|
|
|
// Get the result value. A result of true means the file exists.
|
|
return File.hasValue();
|
|
}
|
|
|
|
/// EvaluateHasInclude - Process a '__has_include("path")' expression.
|
|
/// Returns true if successful.
|
|
static bool EvaluateHasInclude(Token &Tok, IdentifierInfo *II,
|
|
Preprocessor &PP) {
|
|
return EvaluateHasIncludeCommon(Tok, II, PP, nullptr, nullptr);
|
|
}
|
|
|
|
/// EvaluateHasIncludeNext - Process '__has_include_next("path")' expression.
|
|
/// Returns true if successful.
|
|
static bool EvaluateHasIncludeNext(Token &Tok,
|
|
IdentifierInfo *II, Preprocessor &PP) {
|
|
// __has_include_next is like __has_include, except that we start
|
|
// searching after the current found directory. If we can't do this,
|
|
// issue a diagnostic.
|
|
// FIXME: Factor out duplication with
|
|
// Preprocessor::HandleIncludeNextDirective.
|
|
const DirectoryLookup *Lookup = PP.GetCurDirLookup();
|
|
const FileEntry *LookupFromFile = nullptr;
|
|
if (PP.isInPrimaryFile() && PP.getLangOpts().IsHeaderFile) {
|
|
// If the main file is a header, then it's either for PCH/AST generation,
|
|
// or libclang opened it. Either way, handle it as a normal include below
|
|
// and do not complain about __has_include_next.
|
|
} else if (PP.isInPrimaryFile()) {
|
|
Lookup = nullptr;
|
|
PP.Diag(Tok, diag::pp_include_next_in_primary);
|
|
} else if (PP.getCurrentLexerSubmodule()) {
|
|
// Start looking up in the directory *after* the one in which the current
|
|
// file would be found, if any.
|
|
assert(PP.getCurrentLexer() && "#include_next directive in macro?");
|
|
LookupFromFile = PP.getCurrentLexer()->getFileEntry();
|
|
Lookup = nullptr;
|
|
} else if (!Lookup) {
|
|
PP.Diag(Tok, diag::pp_include_next_absolute_path);
|
|
} else {
|
|
// Start looking up in the next directory.
|
|
++Lookup;
|
|
}
|
|
|
|
return EvaluateHasIncludeCommon(Tok, II, PP, Lookup, LookupFromFile);
|
|
}
|
|
|
|
/// Process single-argument builtin feature-like macros that return
|
|
/// integer values.
|
|
static void EvaluateFeatureLikeBuiltinMacro(llvm::raw_svector_ostream& OS,
|
|
Token &Tok, IdentifierInfo *II,
|
|
Preprocessor &PP,
|
|
llvm::function_ref<
|
|
int(Token &Tok,
|
|
bool &HasLexedNextTok)> Op) {
|
|
// Parse the initial '('.
|
|
PP.LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
PP.Diag(Tok.getLocation(), diag::err_pp_expected_after) << II
|
|
<< tok::l_paren;
|
|
|
|
// Provide a dummy '0' value on output stream to elide further errors.
|
|
if (!Tok.isOneOf(tok::eof, tok::eod)) {
|
|
OS << 0;
|
|
Tok.setKind(tok::numeric_constant);
|
|
}
|
|
return;
|
|
}
|
|
|
|
unsigned ParenDepth = 1;
|
|
SourceLocation LParenLoc = Tok.getLocation();
|
|
llvm::Optional<int> Result;
|
|
|
|
Token ResultTok;
|
|
bool SuppressDiagnostic = false;
|
|
while (true) {
|
|
// Parse next token.
|
|
PP.LexUnexpandedToken(Tok);
|
|
|
|
already_lexed:
|
|
switch (Tok.getKind()) {
|
|
case tok::eof:
|
|
case tok::eod:
|
|
// Don't provide even a dummy value if the eod or eof marker is
|
|
// reached. Simply provide a diagnostic.
|
|
PP.Diag(Tok.getLocation(), diag::err_unterm_macro_invoc);
|
|
return;
|
|
|
|
case tok::comma:
|
|
if (!SuppressDiagnostic) {
|
|
PP.Diag(Tok.getLocation(), diag::err_too_many_args_in_macro_invoc);
|
|
SuppressDiagnostic = true;
|
|
}
|
|
continue;
|
|
|
|
case tok::l_paren:
|
|
++ParenDepth;
|
|
if (Result.hasValue())
|
|
break;
|
|
if (!SuppressDiagnostic) {
|
|
PP.Diag(Tok.getLocation(), diag::err_pp_nested_paren) << II;
|
|
SuppressDiagnostic = true;
|
|
}
|
|
continue;
|
|
|
|
case tok::r_paren:
|
|
if (--ParenDepth > 0)
|
|
continue;
|
|
|
|
// The last ')' has been reached; return the value if one found or
|
|
// a diagnostic and a dummy value.
|
|
if (Result.hasValue()) {
|
|
OS << Result.getValue();
|
|
// For strict conformance to __has_cpp_attribute rules, use 'L'
|
|
// suffix for dated literals.
|
|
if (Result.getValue() > 1)
|
|
OS << 'L';
|
|
} else {
|
|
OS << 0;
|
|
if (!SuppressDiagnostic)
|
|
PP.Diag(Tok.getLocation(), diag::err_too_few_args_in_macro_invoc);
|
|
}
|
|
Tok.setKind(tok::numeric_constant);
|
|
return;
|
|
|
|
default: {
|
|
// Parse the macro argument, if one not found so far.
|
|
if (Result.hasValue())
|
|
break;
|
|
|
|
bool HasLexedNextToken = false;
|
|
Result = Op(Tok, HasLexedNextToken);
|
|
ResultTok = Tok;
|
|
if (HasLexedNextToken)
|
|
goto already_lexed;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Diagnose missing ')'.
|
|
if (!SuppressDiagnostic) {
|
|
if (auto Diag = PP.Diag(Tok.getLocation(), diag::err_pp_expected_after)) {
|
|
if (IdentifierInfo *LastII = ResultTok.getIdentifierInfo())
|
|
Diag << LastII;
|
|
else
|
|
Diag << ResultTok.getKind();
|
|
Diag << tok::r_paren << ResultTok.getLocation();
|
|
}
|
|
PP.Diag(LParenLoc, diag::note_matching) << tok::l_paren;
|
|
SuppressDiagnostic = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Helper function to return the IdentifierInfo structure of a Token
|
|
/// or generate a diagnostic if none available.
|
|
static IdentifierInfo *ExpectFeatureIdentifierInfo(Token &Tok,
|
|
Preprocessor &PP,
|
|
signed DiagID) {
|
|
IdentifierInfo *II;
|
|
if (!Tok.isAnnotation() && (II = Tok.getIdentifierInfo()))
|
|
return II;
|
|
|
|
PP.Diag(Tok.getLocation(), DiagID);
|
|
return nullptr;
|
|
}
|
|
|
|
/// Implements the __is_target_arch builtin macro.
|
|
static bool isTargetArch(const TargetInfo &TI, const IdentifierInfo *II) {
|
|
std::string ArchName = II->getName().lower() + "--";
|
|
llvm::Triple Arch(ArchName);
|
|
const llvm::Triple &TT = TI.getTriple();
|
|
if (TT.isThumb()) {
|
|
// arm matches thumb or thumbv7. armv7 matches thumbv7.
|
|
if ((Arch.getSubArch() == llvm::Triple::NoSubArch ||
|
|
Arch.getSubArch() == TT.getSubArch()) &&
|
|
((TT.getArch() == llvm::Triple::thumb &&
|
|
Arch.getArch() == llvm::Triple::arm) ||
|
|
(TT.getArch() == llvm::Triple::thumbeb &&
|
|
Arch.getArch() == llvm::Triple::armeb)))
|
|
return true;
|
|
}
|
|
// Check the parsed arch when it has no sub arch to allow Clang to
|
|
// match thumb to thumbv7 but to prohibit matching thumbv6 to thumbv7.
|
|
return (Arch.getSubArch() == llvm::Triple::NoSubArch ||
|
|
Arch.getSubArch() == TT.getSubArch()) &&
|
|
Arch.getArch() == TT.getArch();
|
|
}
|
|
|
|
/// Implements the __is_target_vendor builtin macro.
|
|
static bool isTargetVendor(const TargetInfo &TI, const IdentifierInfo *II) {
|
|
StringRef VendorName = TI.getTriple().getVendorName();
|
|
if (VendorName.empty())
|
|
VendorName = "unknown";
|
|
return VendorName.equals_lower(II->getName());
|
|
}
|
|
|
|
/// Implements the __is_target_os builtin macro.
|
|
static bool isTargetOS(const TargetInfo &TI, const IdentifierInfo *II) {
|
|
std::string OSName =
|
|
(llvm::Twine("unknown-unknown-") + II->getName().lower()).str();
|
|
llvm::Triple OS(OSName);
|
|
if (OS.getOS() == llvm::Triple::Darwin) {
|
|
// Darwin matches macos, ios, etc.
|
|
return TI.getTriple().isOSDarwin();
|
|
}
|
|
return TI.getTriple().getOS() == OS.getOS();
|
|
}
|
|
|
|
/// Implements the __is_target_environment builtin macro.
|
|
static bool isTargetEnvironment(const TargetInfo &TI,
|
|
const IdentifierInfo *II) {
|
|
std::string EnvName = (llvm::Twine("---") + II->getName().lower()).str();
|
|
llvm::Triple Env(EnvName);
|
|
return TI.getTriple().getEnvironment() == Env.getEnvironment();
|
|
}
|
|
|
|
static void remapMacroPath(
|
|
SmallString<256> &Path,
|
|
const std::map<std::string, std::string, std::greater<std::string>>
|
|
&MacroPrefixMap) {
|
|
for (const auto &Entry : MacroPrefixMap)
|
|
if (llvm::sys::path::replace_path_prefix(Path, Entry.first, Entry.second))
|
|
break;
|
|
}
|
|
|
|
/// ExpandBuiltinMacro - If an identifier token is read that is to be expanded
|
|
/// as a builtin macro, handle it and return the next token as 'Tok'.
|
|
void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
|
|
// Figure out which token this is.
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
assert(II && "Can't be a macro without id info!");
|
|
|
|
// If this is an _Pragma or Microsoft __pragma directive, expand it,
|
|
// invoke the pragma handler, then lex the token after it.
|
|
if (II == Ident_Pragma)
|
|
return Handle_Pragma(Tok);
|
|
else if (II == Ident__pragma) // in non-MS mode this is null
|
|
return HandleMicrosoft__pragma(Tok);
|
|
|
|
++NumBuiltinMacroExpanded;
|
|
|
|
SmallString<128> TmpBuffer;
|
|
llvm::raw_svector_ostream OS(TmpBuffer);
|
|
|
|
// Set up the return result.
|
|
Tok.setIdentifierInfo(nullptr);
|
|
Tok.clearFlag(Token::NeedsCleaning);
|
|
bool IsAtStartOfLine = Tok.isAtStartOfLine();
|
|
bool HasLeadingSpace = Tok.hasLeadingSpace();
|
|
|
|
if (II == Ident__LINE__) {
|
|
// C99 6.10.8: "__LINE__: The presumed line number (within the current
|
|
// source file) of the current source line (an integer constant)". This can
|
|
// be affected by #line.
|
|
SourceLocation Loc = Tok.getLocation();
|
|
|
|
// Advance to the location of the first _, this might not be the first byte
|
|
// of the token if it starts with an escaped newline.
|
|
Loc = AdvanceToTokenCharacter(Loc, 0);
|
|
|
|
// One wrinkle here is that GCC expands __LINE__ to location of the *end* of
|
|
// a macro expansion. This doesn't matter for object-like macros, but
|
|
// can matter for a function-like macro that expands to contain __LINE__.
|
|
// Skip down through expansion points until we find a file loc for the
|
|
// end of the expansion history.
|
|
Loc = SourceMgr.getExpansionRange(Loc).getEnd();
|
|
PresumedLoc PLoc = SourceMgr.getPresumedLoc(Loc);
|
|
|
|
// __LINE__ expands to a simple numeric value.
|
|
OS << (PLoc.isValid()? PLoc.getLine() : 1);
|
|
Tok.setKind(tok::numeric_constant);
|
|
} else if (II == Ident__FILE__ || II == Ident__BASE_FILE__ ||
|
|
II == Ident__FILE_NAME__) {
|
|
// C99 6.10.8: "__FILE__: The presumed name of the current source file (a
|
|
// character string literal)". This can be affected by #line.
|
|
PresumedLoc PLoc = SourceMgr.getPresumedLoc(Tok.getLocation());
|
|
|
|
// __BASE_FILE__ is a GNU extension that returns the top of the presumed
|
|
// #include stack instead of the current file.
|
|
if (II == Ident__BASE_FILE__ && PLoc.isValid()) {
|
|
SourceLocation NextLoc = PLoc.getIncludeLoc();
|
|
while (NextLoc.isValid()) {
|
|
PLoc = SourceMgr.getPresumedLoc(NextLoc);
|
|
if (PLoc.isInvalid())
|
|
break;
|
|
|
|
NextLoc = PLoc.getIncludeLoc();
|
|
}
|
|
}
|
|
|
|
// Escape this filename. Turn '\' -> '\\' '"' -> '\"'
|
|
SmallString<256> FN;
|
|
if (PLoc.isValid()) {
|
|
// __FILE_NAME__ is a Clang-specific extension that expands to the
|
|
// the last part of __FILE__.
|
|
if (II == Ident__FILE_NAME__) {
|
|
// Try to get the last path component, failing that return the original
|
|
// presumed location.
|
|
StringRef PLFileName = llvm::sys::path::filename(PLoc.getFilename());
|
|
if (PLFileName != "")
|
|
FN += PLFileName;
|
|
else
|
|
FN += PLoc.getFilename();
|
|
} else {
|
|
FN += PLoc.getFilename();
|
|
}
|
|
remapMacroPath(FN, PPOpts->MacroPrefixMap);
|
|
Lexer::Stringify(FN);
|
|
OS << '"' << FN << '"';
|
|
}
|
|
Tok.setKind(tok::string_literal);
|
|
} else if (II == Ident__DATE__) {
|
|
Diag(Tok.getLocation(), diag::warn_pp_date_time);
|
|
if (!DATELoc.isValid())
|
|
ComputeDATE_TIME(DATELoc, TIMELoc, *this);
|
|
Tok.setKind(tok::string_literal);
|
|
Tok.setLength(strlen("\"Mmm dd yyyy\""));
|
|
Tok.setLocation(SourceMgr.createExpansionLoc(DATELoc, Tok.getLocation(),
|
|
Tok.getLocation(),
|
|
Tok.getLength()));
|
|
return;
|
|
} else if (II == Ident__TIME__) {
|
|
Diag(Tok.getLocation(), diag::warn_pp_date_time);
|
|
if (!TIMELoc.isValid())
|
|
ComputeDATE_TIME(DATELoc, TIMELoc, *this);
|
|
Tok.setKind(tok::string_literal);
|
|
Tok.setLength(strlen("\"hh:mm:ss\""));
|
|
Tok.setLocation(SourceMgr.createExpansionLoc(TIMELoc, Tok.getLocation(),
|
|
Tok.getLocation(),
|
|
Tok.getLength()));
|
|
return;
|
|
} else if (II == Ident__INCLUDE_LEVEL__) {
|
|
// Compute the presumed include depth of this token. This can be affected
|
|
// by GNU line markers.
|
|
unsigned Depth = 0;
|
|
|
|
PresumedLoc PLoc = SourceMgr.getPresumedLoc(Tok.getLocation());
|
|
if (PLoc.isValid()) {
|
|
PLoc = SourceMgr.getPresumedLoc(PLoc.getIncludeLoc());
|
|
for (; PLoc.isValid(); ++Depth)
|
|
PLoc = SourceMgr.getPresumedLoc(PLoc.getIncludeLoc());
|
|
}
|
|
|
|
// __INCLUDE_LEVEL__ expands to a simple numeric value.
|
|
OS << Depth;
|
|
Tok.setKind(tok::numeric_constant);
|
|
} else if (II == Ident__TIMESTAMP__) {
|
|
Diag(Tok.getLocation(), diag::warn_pp_date_time);
|
|
// MSVC, ICC, GCC, VisualAge C++ extension. The generated string should be
|
|
// of the form "Ddd Mmm dd hh::mm::ss yyyy", which is returned by asctime.
|
|
|
|
// Get the file that we are lexing out of. If we're currently lexing from
|
|
// a macro, dig into the include stack.
|
|
const FileEntry *CurFile = nullptr;
|
|
PreprocessorLexer *TheLexer = getCurrentFileLexer();
|
|
|
|
if (TheLexer)
|
|
CurFile = SourceMgr.getFileEntryForID(TheLexer->getFileID());
|
|
|
|
const char *Result;
|
|
if (CurFile) {
|
|
time_t TT = CurFile->getModificationTime();
|
|
struct tm *TM = localtime(&TT);
|
|
Result = asctime(TM);
|
|
} else {
|
|
Result = "??? ??? ?? ??:??:?? ????\n";
|
|
}
|
|
// Surround the string with " and strip the trailing newline.
|
|
OS << '"' << StringRef(Result).drop_back() << '"';
|
|
Tok.setKind(tok::string_literal);
|
|
} else if (II == Ident__COUNTER__) {
|
|
// __COUNTER__ expands to a simple numeric value.
|
|
OS << CounterValue++;
|
|
Tok.setKind(tok::numeric_constant);
|
|
} else if (II == Ident__has_feature) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
return II && HasFeature(*this, II->getName());
|
|
});
|
|
} else if (II == Ident__has_extension) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
return II && HasExtension(*this, II->getName());
|
|
});
|
|
} else if (II == Ident__has_builtin) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
if (!II)
|
|
return false;
|
|
else if (II->getBuiltinID() != 0) {
|
|
switch (II->getBuiltinID()) {
|
|
case Builtin::BI__builtin_operator_new:
|
|
case Builtin::BI__builtin_operator_delete:
|
|
// denotes date of behavior change to support calling arbitrary
|
|
// usual allocation and deallocation functions. Required by libc++
|
|
return 201802;
|
|
default:
|
|
return true;
|
|
}
|
|
return true;
|
|
} else if (II->getTokenID() != tok::identifier ||
|
|
II->hasRevertedTokenIDToIdentifier()) {
|
|
// Treat all keywords that introduce a custom syntax of the form
|
|
//
|
|
// '__some_keyword' '(' [...] ')'
|
|
//
|
|
// as being "builtin functions", even if the syntax isn't a valid
|
|
// function call (for example, because the builtin takes a type
|
|
// argument).
|
|
if (II->getName().startswith("__builtin_") ||
|
|
II->getName().startswith("__is_") ||
|
|
II->getName().startswith("__has_"))
|
|
return true;
|
|
return llvm::StringSwitch<bool>(II->getName())
|
|
.Case("__array_rank", true)
|
|
.Case("__array_extent", true)
|
|
.Case("__reference_binds_to_temporary", true)
|
|
.Case("__underlying_type", true)
|
|
.Default(false);
|
|
} else {
|
|
return llvm::StringSwitch<bool>(II->getName())
|
|
// Report builtin templates as being builtins.
|
|
.Case("__make_integer_seq", getLangOpts().CPlusPlus)
|
|
.Case("__type_pack_element", getLangOpts().CPlusPlus)
|
|
// Likewise for some builtin preprocessor macros.
|
|
// FIXME: This is inconsistent; we usually suggest detecting
|
|
// builtin macros via #ifdef. Don't add more cases here.
|
|
.Case("__is_target_arch", true)
|
|
.Case("__is_target_vendor", true)
|
|
.Case("__is_target_os", true)
|
|
.Case("__is_target_environment", true)
|
|
.Default(false);
|
|
}
|
|
});
|
|
} else if (II == Ident__is_identifier) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
return Tok.is(tok::identifier);
|
|
});
|
|
} else if (II == Ident__has_attribute) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
return II ? hasAttribute(AttrSyntax::GNU, nullptr, II,
|
|
getTargetInfo(), getLangOpts()) : 0;
|
|
});
|
|
} else if (II == Ident__has_declspec) {
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
if (II) {
|
|
const LangOptions &LangOpts = getLangOpts();
|
|
return LangOpts.DeclSpecKeyword &&
|
|
hasAttribute(AttrSyntax::Declspec, nullptr, II,
|
|
getTargetInfo(), LangOpts);
|
|
}
|
|
|
|
return false;
|
|
});
|
|
} else if (II == Ident__has_cpp_attribute ||
|
|
II == Ident__has_c_attribute) {
|
|
bool IsCXX = II == Ident__has_cpp_attribute;
|
|
EvaluateFeatureLikeBuiltinMacro(
|
|
OS, Tok, II, *this, [&](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *ScopeII = nullptr;
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(
|
|
Tok, *this, diag::err_feature_check_malformed);
|
|
if (!II)
|
|
return false;
|
|
|
|
// It is possible to receive a scope token. Read the "::", if it is
|
|
// available, and the subsequent identifier.
|
|
LexUnexpandedToken(Tok);
|
|
if (Tok.isNot(tok::coloncolon))
|
|
HasLexedNextToken = true;
|
|
else {
|
|
ScopeII = II;
|
|
LexUnexpandedToken(Tok);
|
|
II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_feature_check_malformed);
|
|
}
|
|
|
|
AttrSyntax Syntax = IsCXX ? AttrSyntax::CXX : AttrSyntax::C;
|
|
return II ? hasAttribute(Syntax, ScopeII, II, getTargetInfo(),
|
|
getLangOpts())
|
|
: 0;
|
|
});
|
|
} else if (II == Ident__has_include ||
|
|
II == Ident__has_include_next) {
|
|
// The argument to these two builtins should be a parenthesized
|
|
// file name string literal using angle brackets (<>) or
|
|
// double-quotes ("").
|
|
bool Value;
|
|
if (II == Ident__has_include)
|
|
Value = EvaluateHasInclude(Tok, II, *this);
|
|
else
|
|
Value = EvaluateHasIncludeNext(Tok, II, *this);
|
|
|
|
if (Tok.isNot(tok::r_paren))
|
|
return;
|
|
OS << (int)Value;
|
|
Tok.setKind(tok::numeric_constant);
|
|
} else if (II == Ident__has_warning) {
|
|
// The argument should be a parenthesized string literal.
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
std::string WarningName;
|
|
SourceLocation StrStartLoc = Tok.getLocation();
|
|
|
|
HasLexedNextToken = Tok.is(tok::string_literal);
|
|
if (!FinishLexStringLiteral(Tok, WarningName, "'__has_warning'",
|
|
/*AllowMacroExpansion=*/false))
|
|
return false;
|
|
|
|
// FIXME: Should we accept "-R..." flags here, or should that be
|
|
// handled by a separate __has_remark?
|
|
if (WarningName.size() < 3 || WarningName[0] != '-' ||
|
|
WarningName[1] != 'W') {
|
|
Diag(StrStartLoc, diag::warn_has_warning_invalid_option);
|
|
return false;
|
|
}
|
|
|
|
// Finally, check if the warning flags maps to a diagnostic group.
|
|
// We construct a SmallVector here to talk to getDiagnosticIDs().
|
|
// Although we don't use the result, this isn't a hot path, and not
|
|
// worth special casing.
|
|
SmallVector<diag::kind, 10> Diags;
|
|
return !getDiagnostics().getDiagnosticIDs()->
|
|
getDiagnosticsInGroup(diag::Flavor::WarningOrError,
|
|
WarningName.substr(2), Diags);
|
|
});
|
|
} else if (II == Ident__building_module) {
|
|
// The argument to this builtin should be an identifier. The
|
|
// builtin evaluates to 1 when that identifier names the module we are
|
|
// currently building.
|
|
EvaluateFeatureLikeBuiltinMacro(OS, Tok, II, *this,
|
|
[this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(Tok, *this,
|
|
diag::err_expected_id_building_module);
|
|
return getLangOpts().isCompilingModule() && II &&
|
|
(II->getName() == getLangOpts().CurrentModule);
|
|
});
|
|
} else if (II == Ident__MODULE__) {
|
|
// The current module as an identifier.
|
|
OS << getLangOpts().CurrentModule;
|
|
IdentifierInfo *ModuleII = getIdentifierInfo(getLangOpts().CurrentModule);
|
|
Tok.setIdentifierInfo(ModuleII);
|
|
Tok.setKind(ModuleII->getTokenID());
|
|
} else if (II == Ident__identifier) {
|
|
SourceLocation Loc = Tok.getLocation();
|
|
|
|
// We're expecting '__identifier' '(' identifier ')'. Try to recover
|
|
// if the parens are missing.
|
|
LexNonComment(Tok);
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
// No '(', use end of last token.
|
|
Diag(getLocForEndOfToken(Loc), diag::err_pp_expected_after)
|
|
<< II << tok::l_paren;
|
|
// If the next token isn't valid as our argument, we can't recover.
|
|
if (!Tok.isAnnotation() && Tok.getIdentifierInfo())
|
|
Tok.setKind(tok::identifier);
|
|
return;
|
|
}
|
|
|
|
SourceLocation LParenLoc = Tok.getLocation();
|
|
LexNonComment(Tok);
|
|
|
|
if (!Tok.isAnnotation() && Tok.getIdentifierInfo())
|
|
Tok.setKind(tok::identifier);
|
|
else {
|
|
Diag(Tok.getLocation(), diag::err_pp_identifier_arg_not_identifier)
|
|
<< Tok.getKind();
|
|
// Don't walk past anything that's not a real token.
|
|
if (Tok.isOneOf(tok::eof, tok::eod) || Tok.isAnnotation())
|
|
return;
|
|
}
|
|
|
|
// Discard the ')', preserving 'Tok' as our result.
|
|
Token RParen;
|
|
LexNonComment(RParen);
|
|
if (RParen.isNot(tok::r_paren)) {
|
|
Diag(getLocForEndOfToken(Tok.getLocation()), diag::err_pp_expected_after)
|
|
<< Tok.getKind() << tok::r_paren;
|
|
Diag(LParenLoc, diag::note_matching) << tok::l_paren;
|
|
}
|
|
return;
|
|
} else if (II == Ident__is_target_arch) {
|
|
EvaluateFeatureLikeBuiltinMacro(
|
|
OS, Tok, II, *this, [this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(
|
|
Tok, *this, diag::err_feature_check_malformed);
|
|
return II && isTargetArch(getTargetInfo(), II);
|
|
});
|
|
} else if (II == Ident__is_target_vendor) {
|
|
EvaluateFeatureLikeBuiltinMacro(
|
|
OS, Tok, II, *this, [this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(
|
|
Tok, *this, diag::err_feature_check_malformed);
|
|
return II && isTargetVendor(getTargetInfo(), II);
|
|
});
|
|
} else if (II == Ident__is_target_os) {
|
|
EvaluateFeatureLikeBuiltinMacro(
|
|
OS, Tok, II, *this, [this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(
|
|
Tok, *this, diag::err_feature_check_malformed);
|
|
return II && isTargetOS(getTargetInfo(), II);
|
|
});
|
|
} else if (II == Ident__is_target_environment) {
|
|
EvaluateFeatureLikeBuiltinMacro(
|
|
OS, Tok, II, *this, [this](Token &Tok, bool &HasLexedNextToken) -> int {
|
|
IdentifierInfo *II = ExpectFeatureIdentifierInfo(
|
|
Tok, *this, diag::err_feature_check_malformed);
|
|
return II && isTargetEnvironment(getTargetInfo(), II);
|
|
});
|
|
} else {
|
|
llvm_unreachable("Unknown identifier!");
|
|
}
|
|
CreateString(OS.str(), Tok, Tok.getLocation(), Tok.getLocation());
|
|
Tok.setFlagValue(Token::StartOfLine, IsAtStartOfLine);
|
|
Tok.setFlagValue(Token::LeadingSpace, HasLeadingSpace);
|
|
}
|
|
|
|
void Preprocessor::markMacroAsUsed(MacroInfo *MI) {
|
|
// If the 'used' status changed, and the macro requires 'unused' warning,
|
|
// remove its SourceLocation from the warn-for-unused-macro locations.
|
|
if (MI->isWarnIfUnused() && !MI->isUsed())
|
|
WarnUnusedMacroLocs.erase(MI->getDefinitionLoc());
|
|
MI->setIsUsed(true);
|
|
}
|