Пример #1
0
Optional<ASTBuilder::ForeignModuleKind>
ASTBuilder::getForeignModuleKind(NodePointer node) {
  if (node->getKind() == Demangle::Node::Kind::DeclContext)
    return getForeignModuleKind(node->getFirstChild());

  if (node->getKind() != Demangle::Node::Kind::Module)
    return None;

  return llvm::StringSwitch<Optional<ForeignModuleKind>>(node->getText())
      .Case(MANGLING_MODULE_OBJC, ForeignModuleKind::Imported)
      .Case(MANGLING_MODULE_CLANG_IMPORTER,
            ForeignModuleKind::SynthesizedByImporter)
      .Default(None);
}
Пример #2
0
bool Context::isThunkSymbol(llvm::StringRef MangledName) {
  if (isMangledName(MangledName)) {
    // First do a quick check
    if (MangledName.endswith("TA") ||  // partial application forwarder
        MangledName.endswith("Ta") ||  // ObjC partial application forwarder
        MangledName.endswith("To") ||  // swift-as-ObjC thunk
        MangledName.endswith("TO") ||  // ObjC-as-swift thunk
        MangledName.endswith("TR") ||  // reabstraction thunk helper function
        MangledName.endswith("Tr") ||  // reabstraction thunk
        MangledName.endswith("TW") ||  // protocol witness thunk
        MangledName.endswith("fC")) {  // allocating constructor

      // To avoid false positives, we need to fully demangle the symbol.
      NodePointer Nd = D->demangleSymbol(MangledName);
      if (!Nd || Nd->getKind() != Node::Kind::Global ||
          Nd->getNumChildren() == 0)
        return false;

      switch (Nd->getFirstChild()->getKind()) {
        case Node::Kind::ObjCAttribute:
        case Node::Kind::NonObjCAttribute:
        case Node::Kind::PartialApplyObjCForwarder:
        case Node::Kind::PartialApplyForwarder:
        case Node::Kind::ReabstractionThunkHelper:
        case Node::Kind::ReabstractionThunk:
        case Node::Kind::ProtocolWitness:
        case Node::Kind::Allocator:
          return true;
        default:
          break;
      }
    }
    return false;
  }

  if (MangledName.startswith("_T")) {
    // Old mangling.
    StringRef Remaining = MangledName.substr(2);
    if (Remaining.startswith("To") ||   // swift-as-ObjC thunk
        Remaining.startswith("TO") ||   // ObjC-as-swift thunk
        Remaining.startswith("PA_") ||  // partial application forwarder
        Remaining.startswith("PAo_")) { // ObjC partial application forwarder
      return true;
    }
  }
  return false;
}