Method newNamedLabelId

libraries/asmjit/asmjit/base/codeholder.cpp:449–519

}

Error CodeHolder::newNamedLabelId(uint32_t& idOut, const char* name, size_t nameLength, uint32_t type, uint32_t parentId) noexcept {
  idOut = 0;
  uint32_t hVal = CodeHolder_hashNameAndFixLen(name, nameLength);

  if (ASMJIT_UNLIKELY(nameLength == 0))
    return DebugUtils::errored(kErrorInvalidLabelName);

  if (ASMJIT_UNLIKELY(nameLength > Globals::kMaxLabelLength))
    return DebugUtils::errored(kErrorLabelNameTooLong);

  switch (type) {
    case Label::kTypeLocal:
      if (ASMJIT_UNLIKELY(Operand::unpackId(parentId) >= _labels.getLength()))
        return DebugUtils::errored(kErrorInvalidParentLabel);

      hVal ^= parentId;
      break;

    case Label::kTypeGlobal:
      if (ASMJIT_UNLIKELY(parentId != 0))
        return DebugUtils::errored(kErrorNonLocalLabelCantHaveParent);

      break;

    default:
      return DebugUtils::errored(kErrorInvalidArgument);
  }

  // Don't allow to insert duplicates. Local labels allow duplicates that have
  // different id, this is already accomplished by having a different hashes
  // between the same label names having different parent labels.
  LabelEntry* le = _namedLabels.get(LabelByName(name, nameLength, hVal));
  if (ASMJIT_UNLIKELY(le))
    return DebugUtils::errored(kErrorLabelAlreadyDefined);

  Error err = kErrorOk;
  size_t index = _labels.getLength();

  if (ASMJIT_UNLIKELY(index >= Operand::kPackedIdCount))
    return DebugUtils::errored(kErrorLabelIndexOverflow);

  ASMJIT_PROPAGATE(_labels.willGrow(&_baseHeap));
  le = _baseHeap.allocZeroedT<LabelEntry>();

  if (ASMJIT_UNLIKELY(!le))
    return  DebugUtils::errored(kErrorNoHeapMemory);

  uint32_t id = Operand::packId(static_cast<uint32_t>(index));
  le->_hVal = hVal;
  le->_setId(id);
  le->_type = static_cast<uint8_t>(type);
  le->_parentId = 0;
  le->_sectionId = SectionEntry::kInvalidId;
  le->_offset = 0;

  if (le->_name.mustEmbed(nameLength)) {
    le->_name.setEmbedded(name, nameLength);
  }