#include <stdio.h>
#include <string.h>
#include <stdexcept>
#include <signal.h>

void throw_signal( int signum )
{
  //  fprintf(stderr,"throw_signal: before throw; signum=%d\n",signum);fflush(stderr);
  throw std::runtime_error ("throw_signal");
}

int main() {

  struct sigaction new_action, d_old_action;
  memset (&new_action, 0, sizeof (new_action));

  new_action.sa_handler = throw_signal;
  sigemptyset (&new_action.sa_mask);
  new_action.sa_flags = 0;

  if (sigaction (SIGSEGV, &new_action, &d_old_action) < 0){
    perror ("sigaction (install new)");
    throw std::runtime_error ("sigaction");
  }

  try {
    int j = *((int *)NULL);
  }
  catch (...){
    printf("caught exception\n");
  }
}