Software and hardware debugging (gdb, ftrace, Trace32, JTAG debugger, analog and digital Oscilloscope), DLT, DET.
Static test (Misra metrics, CodeProver, BugFinder), Unit test (gmock, cmocka, RTRT), Integration test (GNU, Tasking, GHS, T32, I-jet) , System test (HMI, Jenkins, CANSim, CANoe, VT-system).