C++ ToolChain::getRTTIMode方法代码示例

SanitizerArgs::SanitizerArgs(const ToolChain &TC,
                             const llvm::opt::ArgList &Args) {
  clear();
  SanitizerMask AllRemove = 0;  // During the loop below, the accumulated set of
                                // sanitizers disabled by the current sanitizer
                                // argument or any argument after it.
  SanitizerMask AllAddedKinds = 0;  // Mask of all sanitizers ever enabled by
                                    // -fsanitize= flags (directly or via group
                                    // expansion), some of which may be disabled
                                    // later. Used to carefully prune
                                    // unused-argument diagnostics.
  SanitizerMask DiagnosedKinds = 0;  // All Kinds we have diagnosed up to now.
                                     // Used to deduplicate diagnostics.
  SanitizerMask Kinds = 0;
  const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();

  const Driver &D = TC.getDriver();
  SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
  SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;

  for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
       I != E; ++I) {
    const auto *Arg = *I;
    if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
      Arg->claim();
      SanitizerMask Add = parseArgValues(D, Arg, true);
      AllAddedKinds |= expandSanitizerGroups(Add);

      // Avoid diagnosing any sanitizer which is disabled later.
      Add &= ~AllRemove;
      // At this point we have not expanded groups, so any unsupported
      // sanitizers in Add are those which have been explicitly enabled.
      // Diagnose them.
      if (SanitizerMask KindsToDiagnose =
              Add & InvalidTrappingKinds & ~DiagnosedKinds) {
        std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
        D.Diag(diag::err_drv_argument_not_allowed_with)
            << Desc << "-fsanitize-trap=undefined";
        DiagnosedKinds |= KindsToDiagnose;
      }
      Add &= ~InvalidTrappingKinds;
      if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
        std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
        D.Diag(diag::err_drv_unsupported_opt_for_target)
            << Desc << TC.getTriple().str();
        DiagnosedKinds |= KindsToDiagnose;
      }
      Add &= Supported;

      // Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
      // so we don't error out if -fno-rtti and -fsanitize=undefined were
      // passed.
      if (Add & Vptr &&
          (RTTIMode == ToolChain::RM_DisabledImplicitly ||
           RTTIMode == ToolChain::RM_DisabledExplicitly)) {
        if (RTTIMode == ToolChain::RM_DisabledImplicitly)
          // Warn about not having rtti enabled if the vptr sanitizer is
          // explicitly enabled
          D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
        else {
          const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg();
          assert(NoRTTIArg &&
                 "RTTI disabled explicitly but we have no argument!");
          D.Diag(diag::err_drv_argument_not_allowed_with)
              << "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
        }

        // Take out the Vptr sanitizer from the enabled sanitizers
        AllRemove |= Vptr;
      }

      Add = expandSanitizerGroups(Add);
      // Group expansion may have enabled a sanitizer which is disabled later.
      Add &= ~AllRemove;
      // Silently discard any unsupported sanitizers implicitly enabled through
      // group expansion.
      Add &= ~InvalidTrappingKinds;
      Add &= Supported;

      Kinds |= Add;
    } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
      Arg->claim();
      SanitizerMask Remove = parseArgValues(D, Arg, true);
      AllRemove |= expandSanitizerGroups(Remove);
    }
  }

  // We disable the vptr sanitizer if it was enabled by group expansion but RTTI
  // is disabled.
  if ((Kinds & Vptr) &&
      (RTTIMode == ToolChain::RM_DisabledImplicitly ||
       RTTIMode == ToolChain::RM_DisabledExplicitly)) {
    Kinds &= ~Vptr;
  }

  // Check that LTO is enabled if we need it.
  if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
    D.Diag(diag::err_drv_argument_only_allowed_with)
        << lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
//.........这里部分代码省略.........

SanitizerArgs::SanitizerArgs(const ToolChain &TC,
                             const llvm::opt::ArgList &Args) {
  SanitizerMask AllRemove = 0;  // During the loop below, the accumulated set of
                                // sanitizers disabled by the current sanitizer
                                // argument or any argument after it.
  SanitizerMask AllAddedKinds = 0;  // Mask of all sanitizers ever enabled by
                                    // -fsanitize= flags (directly or via group
                                    // expansion), some of which may be disabled
                                    // later. Used to carefully prune
                                    // unused-argument diagnostics.
  SanitizerMask DiagnosedKinds = 0;  // All Kinds we have diagnosed up to now.
                                     // Used to deduplicate diagnostics.
  SanitizerMask Kinds = 0;
  const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();

  const Driver &D = TC.getDriver();
  SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
  SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;

  MinimalRuntime =
      Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
                   options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);

  // The object size sanitizer should not be enabled at -O0.
  Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
  bool RemoveObjectSizeAtO0 =
      !OptLevel || OptLevel->getOption().matches(options::OPT_O0);

  for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
       I != E; ++I) {
    const auto *Arg = *I;
    if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
      Arg->claim();
      SanitizerMask Add = parseArgValues(D, Arg, /*AllowGroups=*/true);

      if (RemoveObjectSizeAtO0) {
        AllRemove |= SanitizerKind::ObjectSize;

        // The user explicitly enabled the object size sanitizer. Warn that
        // that this does nothing at -O0.
        if (Add & SanitizerKind::ObjectSize)
          D.Diag(diag::warn_drv_object_size_disabled_O0)
              << Arg->getAsString(Args);
      }

      AllAddedKinds |= expandSanitizerGroups(Add);

      // Avoid diagnosing any sanitizer which is disabled later.
      Add &= ~AllRemove;
      // At this point we have not expanded groups, so any unsupported
      // sanitizers in Add are those which have been explicitly enabled.
      // Diagnose them.
      if (SanitizerMask KindsToDiagnose =
              Add & InvalidTrappingKinds & ~DiagnosedKinds) {
        std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
        D.Diag(diag::err_drv_argument_not_allowed_with)
            << Desc << "-fsanitize-trap=undefined";
        DiagnosedKinds |= KindsToDiagnose;
      }
      Add &= ~InvalidTrappingKinds;

      if (MinimalRuntime) {
        if (SanitizerMask KindsToDiagnose =
                Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
          std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
          D.Diag(diag::err_drv_argument_not_allowed_with)
              << Desc << "-fsanitize-minimal-runtime";
          DiagnosedKinds |= KindsToDiagnose;
        }
        Add &= ~NotAllowedWithMinimalRuntime;
      }

      if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
        std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
        D.Diag(diag::err_drv_unsupported_opt_for_target)
            << Desc << TC.getTriple().str();
        DiagnosedKinds |= KindsToDiagnose;
      }
      Add &= Supported;

      // Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
      // so we don't error out if -fno-rtti and -fsanitize=undefined were
      // passed.
      if (Add & Vptr &&
          (RTTIMode == ToolChain::RM_DisabledImplicitly ||
           RTTIMode == ToolChain::RM_DisabledExplicitly)) {
        if (RTTIMode == ToolChain::RM_DisabledImplicitly)
          // Warn about not having rtti enabled if the vptr sanitizer is
          // explicitly enabled
          D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
        else {
          const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg();
          assert(NoRTTIArg &&
                 "RTTI disabled explicitly but we have no argument!");
          D.Diag(diag::err_drv_argument_not_allowed_with)
              << "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
        }

        // Take out the Vptr sanitizer from the enabled sanitizers
//.........这里部分代码省略.........