Dynamic types array of struct segmentation fault [9144]

[mdnasr]

Domain::registerDynamicType crash with segmentation fault when data type contain array of structure. I have tried with both XML Types and Code types producing the same failure.

Current Behavior

The type.xml file:

<types>
  <type>
    <struct name="ChildStruct">
      <member name="index" type="uint32"/>
      <member name="message" type="string"/>
    </struct>
  </type>
  <type>
    <struct name="HelloWorld">
      <member name="child_struct" type="nonBasic" nonBasicTypeName="ChildStruct" arrayDimensions="2"/>
    </struct>
  </type>
</types>

Steps to Reproduce

Using the XML file above with project examples/C++/DDS/DynamicHelloWorldExample will produce the error but edit HelloWorldPublisher.cpp to remove any value intialization.

bool HelloWorldPublisher::init()
{
    if (eprosima::fastrtps::xmlparser::XMLP_ret::XML_OK !=
            eprosima::fastrtps::xmlparser::XMLProfileManager::loadXMLFile("example_type.xml"))
    {
        std::cout << "Cannot open XML file \"example_type.xml\". Please, run the publisher from the folder "
                  << "that contatins this XML file." << std::endl;
        return false;
    }

    eprosima::fastrtps::types::DynamicType_ptr dyn_type =
            eprosima::fastrtps::xmlparser::XMLProfileManager::getDynamicTypeByName("HelloWorld")->build();
    TypeSupport m_type(new eprosima::fastrtps::types::DynamicPubSubType(dyn_type));
    m_Hello = eprosima::fastrtps::types::DynamicDataFactory::get_instance()->create_data(dyn_type);

    DomainParticipantQos pqos;
    pqos.name("Participant_pub");
    mp_participant = DomainParticipantFactory::get_instance()->create_participant(0, pqos);

    if (mp_participant == nullptr)
    {
        return false;
    }

    //REGISTER THE TYPE
    m_type.get()->auto_fill_type_information(false);
    m_type.get()->auto_fill_type_object(true);

    m_type.register_type(mp_participant);
...

Also I have tried with creating types myself with the same error. Using examples/C++/DynamicHelloWorldExample edit in HelloWorldPublisher.cpp

bool HelloWorldPublisher::init()
{
    // Create basic builders
    DynamicTypeBuilder_ptr builder(DynamicTypeBuilderFactory::get_instance()->create_struct_builder());

    // Add members to the struct.
    builder->add_member(0, "index", DynamicTypeBuilderFactory::get_instance()->create_uint32_type());
    builder->add_member(1, "message", DynamicTypeBuilderFactory::get_instance()->create_string_type());
    DynamicType_ptr struct_type = builder->build();

    DynamicTypeBuilder_ptr parent_builder = DynamicTypeBuilderFactory::get_instance()->create_struct_builder();
    parent_builder->add_member(0, "child_struct", struct_type);
    parent_builder->add_member(1, "second", DynamicTypeBuilderFactory::get_instance()->create_int32_type());

    std::vector<uint32_t> lengths = {2};
    DynamicTypeBuilder_ptr array = DynamicTypeBuilderFactory::get_instance()->create_array_builder(&(*parent_builder), lengths);
    array->set_name("HelloWorld");

    DynamicType_ptr dynType = array->build();

    m_DynType.SetDynamicType(dynType);
    m_DynHello = DynamicDataFactory::get_instance()->create_data(dynType);

    ParticipantAttributes PParam;
    PParam.rtps.setName("DynHelloWorld_pub");
    mp_participant = Domain::createParticipant(PParam, (ParticipantListener*)&m_part_list);

...

System information

• Fast-RTPS version: 2.0.0 1df91c1
• OS: Ubuntu 16.04

[bjarnisig]

This is probably very related to #1243

[jparisu]

Thank you for this information.
This bug has been tagged and it will be solved in PR #2207 ASAP.
Please, follow this topic in issue #2184 .