C++ ValueObjectSP::GetCompilerType方法代码示例

void
lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::GetValueOffset (const lldb::ValueObjectSP& node)
{
    if (m_skip_size != UINT32_MAX)
        return;
    if (!node)
        return;
    CompilerType node_type(node->GetCompilerType());
    uint64_t bit_offset;
    if (node_type.GetIndexOfFieldWithName("__value_", NULL, &bit_offset) == UINT32_MAX)
        return;
    m_skip_size = bit_offset / 8u;
}

void lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::GetValueOffset(
    const lldb::ValueObjectSP &node) {
  if (m_skip_size != UINT32_MAX)
    return;
  if (!node)
    return;
  CompilerType node_type(node->GetCompilerType());
  uint64_t bit_offset;
  if (node_type.GetIndexOfFieldWithName("__value_", nullptr, &bit_offset) !=
      UINT32_MAX) {
    m_skip_size = bit_offset / 8u;
  } else {
    ClangASTContext *ast_ctx =
        llvm::dyn_cast_or_null<ClangASTContext>(node_type.GetTypeSystem());
    if (!ast_ctx)
      return;
    CompilerType tree_node_type = ast_ctx->CreateStructForIdentifier(
        ConstString(),
        {{"ptr0", ast_ctx->GetBasicType(lldb::eBasicTypeVoid).GetPointerType()},
         {"ptr1", ast_ctx->GetBasicType(lldb::eBasicTypeVoid).GetPointerType()},
         {"ptr2", ast_ctx->GetBasicType(lldb::eBasicTypeVoid).GetPointerType()},
         {"cw", ast_ctx->GetBasicType(lldb::eBasicTypeBool)},
         {"payload", (m_element_type.GetCompleteType(), m_element_type)}});
    std::string child_name;
    uint32_t child_byte_size;
    int32_t child_byte_offset = 0;
    uint32_t child_bitfield_bit_size;
    uint32_t child_bitfield_bit_offset;
    bool child_is_base_class;
    bool child_is_deref_of_parent;
    uint64_t language_flags;
    if (tree_node_type
            .GetChildCompilerTypeAtIndex(
                nullptr, 4, true, true, true, child_name, child_byte_size,
                child_byte_offset, child_bitfield_bit_size,
                child_bitfield_bit_offset, child_is_base_class,
                child_is_deref_of_parent, nullptr, language_flags)
            .IsValid())
      m_skip_size = (uint32_t)child_byte_offset;
  }
}

Error
ABISysV_mips::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp)
{
    Error error;
    if (!new_value_sp)
    {
        error.SetErrorString("Empty value object for return value.");
        return error;
    }

    CompilerType clang_type = new_value_sp->GetCompilerType();
    if (!clang_type)
    {
        error.SetErrorString ("Null clang type for return value.");
        return error;
    }

    Thread *thread = frame_sp->GetThread().get();

    bool is_signed;
    uint32_t count;
    bool is_complex;

    RegisterContext *reg_ctx = thread->GetRegisterContext().get();

    bool set_it_simple = false;
    if (clang_type.IsIntegerType (is_signed) || clang_type.IsPointerType())
    {
        DataExtractor data;
        Error data_error;
        size_t num_bytes = new_value_sp->GetData(data, data_error);
        if (data_error.Fail())
        {
            error.SetErrorStringWithFormat("Couldn't convert return value to raw data: %s", data_error.AsCString());
            return error;
        }

        lldb::offset_t offset = 0;
        if (num_bytes <= 8)
        {
            const RegisterInfo *r2_info = reg_ctx->GetRegisterInfoByName("r2", 0);
            if (num_bytes <= 4)
            {
                uint32_t raw_value = data.GetMaxU32(&offset, num_bytes);

                if (reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value))
                    set_it_simple = true;
            }
            else
            {
                uint32_t raw_value = data.GetMaxU32(&offset, 4);

                if (reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value))
                {
                    const RegisterInfo *r3_info = reg_ctx->GetRegisterInfoByName("r3", 0);
                    uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset);

                    if (reg_ctx->WriteRegisterFromUnsigned (r3_info, raw_value))
                        set_it_simple = true;
                }
            }
        }
        else
        {
            error.SetErrorString("We don't support returning longer than 64 bit integer values at present.");
        }
    }
    else if (clang_type.IsFloatingPointType (count, is_complex))
    {
        if (is_complex)
            error.SetErrorString ("We don't support returning complex values at present");
        else
            error.SetErrorString ("We don't support returning float values at present");
    }

    if (!set_it_simple)
        error.SetErrorString ("We only support setting simple integer return types at present.");

    return error;
}

Status ABISysV_ppc64::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
                                           lldb::ValueObjectSP &new_value_sp) {
  Status error;
  if (!new_value_sp) {
    error.SetErrorString("Empty value object for return value.");
    return error;
  }

  CompilerType compiler_type = new_value_sp->GetCompilerType();
  if (!compiler_type) {
    error.SetErrorString("Null clang type for return value.");
    return error;
  }

  Thread *thread = frame_sp->GetThread().get();

  bool is_signed;
  uint32_t count;
  bool is_complex;

  RegisterContext *reg_ctx = thread->GetRegisterContext().get();

  bool set_it_simple = false;
  if (compiler_type.IsIntegerOrEnumerationType(is_signed) ||
      compiler_type.IsPointerType()) {
    const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName("r3", 0);

    DataExtractor data;
    Status data_error;
    size_t num_bytes = new_value_sp->GetData(data, data_error);
    if (data_error.Fail()) {
      error.SetErrorStringWithFormat(
          "Couldn't convert return value to raw data: %s",
          data_error.AsCString());
      return error;
    }
    lldb::offset_t offset = 0;
    if (num_bytes <= 8) {
      uint64_t raw_value = data.GetMaxU64(&offset, num_bytes);

      if (reg_ctx->WriteRegisterFromUnsigned(reg_info, raw_value))
        set_it_simple = true;
    } else {
      error.SetErrorString("We don't support returning longer than 64 bit "
                           "integer values at present.");
    }
  } else if (compiler_type.IsFloatingPointType(count, is_complex)) {
    if (is_complex)
      error.SetErrorString(
          "We don't support returning complex values at present");
    else {
      size_t bit_width = compiler_type.GetBitSize(frame_sp.get());
      if (bit_width <= 64) {
        DataExtractor data;
        Status data_error;
        size_t num_bytes = new_value_sp->GetData(data, data_error);
        if (data_error.Fail()) {
          error.SetErrorStringWithFormat(
              "Couldn't convert return value to raw data: %s",
              data_error.AsCString());
          return error;
        }

        unsigned char buffer[16];
        ByteOrder byte_order = data.GetByteOrder();

        data.CopyByteOrderedData(0, num_bytes, buffer, 16, byte_order);
        set_it_simple = true;
      } else {
        // FIXME - don't know how to do 80 bit long doubles yet.
        error.SetErrorString(
            "We don't support returning float values > 64 bits at present");
      }
    }
  }

  if (!set_it_simple) {
    // Okay we've got a structure or something that doesn't fit in a simple
    // register.
    // We should figure out where it really goes, but we don't support this yet.
    error.SetErrorString("We only support setting simple integer and float "
                         "return types at present.");
  }

  return error;
}