Difference between std::terminate and std::abort

Both std::terminate() and std::abort() are used to abnormally terminate a C++ program, but they have some differences:

std::terminate():

• Invoked when an exception is not caught and propagates out of main(), or when an exception is thrown from a destructor during stack unwinding.
• Can be customized by setting a terminate handler using std::set_terminate().
• The default terminate handler calls std::abort().

std::abort():

• Immediately terminates the program without invoking any cleanup or destructors.
• Sends an abnormal termination signal (SIGABRT) to the host environment.
• Cannot be customized.

In summary, std::terminate() provides a customization point before terminating the program, while std::abort() immediately terminates without any opportunity for cleanup or customization.