Why is my terminate handler never called?
I have read that it is possible to call std::set_terminate()
to use a custom function as a global exception handler that catches all unhandled exceptions.
Simplified code of my program:
#include <exception>
#include <stdexcept>
#include <iostream>
void my_terminate_handler()
{
std::cerr << "Terminate handler" << std::endl;
std::cin.get();
std::abort();
}
int main()
{
std::set_terminate(my_terminate_handler);
int i = 1;
i--;
std::cout << 1/i << std::endl;
return 0;
}
Why is it my_terminate_handler()
never called? And in VC ++ 2013, 2015 RC and gcC ++ - 4.8.
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The completion handler will be called if the program calls terminate
. This can happen for a variety of reasons - including an uncaught exception - but division by zero is not one of those reasons. This gives undefined behavior; typically it raises a signal (not a C ++ exception) and you will need to install a signal handler, not a completion handler, to catch this.
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Because there is no uncaught exception in your code. Add one and it will be executed :
#include <exception>
#include <stdexcept>
#include <iostream>
void my_terminate_handler()
{
std::cerr << "Terminate handler" << std::endl;
}
int main()
{
std::set_terminate(my_terminate_handler);
throw "cake";
}
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