Avoid segmentation fault if the Tracking item_type is not defined for the given implementation

src/algorithms/channel/adapters/channel.cc

@@ -23,7 +23,8 @@
 #include "telemetry_decoder_interface.h"
 #include "tracking_interface.h"
 #include <glog/logging.h>
-#include <utility>  // for std::move
+#include <stdexcept>  // for std::invalid_argument
+#include <utility>    // for std::move
 
 
 Channel::Channel(const ConfigurationInterface* configuration,
@@ -113,6 +114,13 @@ void Channel::connect(gr::top_block_sptr top_block)
             acq_->connect(top_block);
         }
     trk_->connect(top_block);
+
+    if (trk_->item_size() == 0)
+        {
+            std::string msg = trk_->role() + ".item_type is not defined for implementation " + trk_->implementation() + '\n';
+            throw std::invalid_argument(msg);
+        }
+
     nav_->connect(top_block);
 
     // Synchronous ports

src/algorithms/tracking/adapters/beidou_b1i_dll_pll_tracking.cc

@@ -72,7 +72,7 @@ BeidouB1iDllPllTracking::BeidouB1iDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/beidou_b3i_dll_pll_tracking.cc

@@ -64,7 +64,7 @@ BeidouB3iDllPllTracking::BeidouB3iDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/galileo_e1_dll_pll_veml_tracking.cc

@@ -65,7 +65,7 @@ GalileoE1DllPllVemlTracking::GalileoE1DllPllVemlTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
 

src/algorithms/tracking/adapters/galileo_e1_tcp_connector_tracking.cc

@@ -74,7 +74,7 @@ GalileoE1TcpConnectorTracking::GalileoE1TcpConnectorTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/galileo_e5a_dll_pll_tracking.cc

@@ -65,7 +65,7 @@ GalileoE5aDllPllTracking::GalileoE5aDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/galileo_e5b_dll_pll_tracking.cc

@@ -66,7 +66,7 @@ GalileoE5bDllPllTracking::GalileoE5bDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/galileo_e6_dll_pll_tracking.cc

@@ -61,7 +61,7 @@ GalileoE6DllPllTracking::GalileoE6DllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_c_aid_tracking.cc

@@ -95,7 +95,7 @@ GlonassL1CaDllPllCAidTracking::GlonassL1CaDllPllCAidTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type_ << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc

@@ -70,7 +70,7 @@ GlonassL1CaDllPllTracking::GlonassL1CaDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_c_aid_tracking.cc

@@ -93,7 +93,7 @@ GlonassL2CaDllPllCAidTracking::GlonassL2CaDllPllCAidTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type_ << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_tracking.cc

@@ -68,7 +68,7 @@ GlonassL2CaDllPllTracking::GlonassL2CaDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/gps_l1_ca_dll_pll_tracking.cc

@@ -73,7 +73,7 @@ GpsL1CaDllPllTracking::GpsL1CaDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/gps_l1_ca_dll_pll_tracking_gpu.cc

@@ -72,7 +72,7 @@ GpsL1CaDllPllTrackingGPU::GpsL1CaDllPllTrackingGPU(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/gps_l1_ca_kf_tracking.cc

@@ -81,7 +81,7 @@ GpsL1CaKfTracking::GpsL1CaKfTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/gps_l1_ca_tcp_connector_tracking.cc

@@ -60,7 +60,7 @@ GpsL1CaTcpConnectorTracking::GpsL1CaTcpConnectorTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << item_type << " unknown tracking item type.";
         }
 

src/algorithms/tracking/adapters/gps_l2_m_dll_pll_tracking.cc

@@ -62,7 +62,7 @@ GpsL2MDllPllTracking::GpsL2MDllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/algorithms/tracking/adapters/gps_l5_dll_pll_tracking.cc

@@ -65,7 +65,7 @@ GpsL5DllPllTracking::GpsL5DllPllTracking(
         }
     else
         {
-            item_size_ = sizeof(gr_complex);
+            item_size_ = 0;
             LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
         }
     channel_ = 0;

src/core/receiver/gnss_block_factory.cc

@@ -393,6 +393,11 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetChannel(
         {
             return nullptr;
         }
+    if (trk_->item_size() == 0)
+        {
+            LOG(ERROR) << trk_->role() << ".item_type=" << acq_item_type << " is not defined for implementation " << trk_->implementation();
+            return nullptr;
+        }
 
     std::unique_ptr<GNSSBlockInterface> channel_ = std::make_unique<Channel>(configuration, channel,
         std::move(acq_),

src/core/receiver/gnss_flowgraph.cc

@@ -804,7 +804,7 @@ int GNSSFlowgraph::connect_channels()
             else
                 {
                     LOG(ERROR) << "Can't connect channel " << i << " internally";
-                    help_hint_ += " * Check implementation names for Channel" + std::to_string(i) + " inner blocks.\n";
+                    help_hint_ += " * Check your configuration for Channel" + std::to_string(i) + " inner blocks.\n";
                     help_hint_ += "   Acquisition blocks documentation at https://gnss-sdr.org/docs/sp-blocks/acquisition/\n";
                     help_hint_ += "   Tracking blocks documentation at https://gnss-sdr.org/docs/sp-blocks/tracking/\n";
                     help_hint_ += "   Telemetry Decoder blocks documentation at https://gnss-sdr.org/docs/sp-blocks/telemetry-decoder/\n";