Catching all unhandled C++ exceptions?

Question

Is there some way to catch exceptions which are otherwise unhandled (including those thrown outside the catch block)?

I\'m not really concerned about all the normal

Answer 1

Provided that C++11 is available, this approach may be used (see example from: http://en.cppreference.com/w/cpp/error/rethrow_exception):

#include <iostream>
#include <exception>

void onterminate() {
  try {
    auto unknown = std::current_exception();
    if (unknown) {
      std::rethrow_exception(unknown);
    } else {
      std::cerr << "normal termination" << std::endl;
    }
  } catch (const std::exception& e) { // for proper `std::` exceptions
    std::cerr << "unexpected exception: " << e.what() << std::endl;
  } catch (...) { // last resort for things like `throw 1;`
    std::cerr << "unknown exception" << std::endl;
  }
}

int main () {
  std::set_terminate(onterminate); // set custom terminate handler
  // code which may throw...
  return 0;
}

This approach also allows you to customize console output for unhandled exceptions: to have something like this

unexpected exception: wrong input parameters
Aborted

instead of this:

terminate called after throwing an instance of 'std::logic_error'
  what():  wrong input parameters
Aborted

Answer 2

Check out std::set_terminate()