//============================================================================
// Name        : SEG-FAULT-HANDLER.hxx
// Author      : Beldyuga Ivan Vikt.
// Version     : 2016/11/19 03:09:24
// Copyright   :
// Description : none.
//============================================================================
#pragma once

#include <iostream>

#include <sys/types.h>
//#include <sys/wait.h>

#include <unistd.h>
#include <signal.h>

#include <functional>
std::function<void()> on_exception_callback = [](){};
// void(*on_exception_callback)() = 0;

char call_gdb_buff[300];

inline void posix_signal(char const* str)
{
//     if( on_exception_callback != 0 )
         on_exception_callback();

     std::cerr << std::endl << "\t" << str << ", enter 'y' to launch gdb..." << std::endl;

     std::string command;
     std::cin >> command;

     pid_t child_pid;

     if( command == "y" )
          switch( child_pid = fork() )
          {
               case 0:     // now it child
                   std::cerr << "Child app: forking success, now debug." << std::endl;
                   system( call_gdb_buff );
                   break;
               case -1:     // error in main app
                    std::cerr << "Main app: forking error." << std::endl;
                    break;
               default:     // main app
                    std::cerr << "Main app: child was forked." << std::endl;
                    sleep(3); // it is need
                    break;
          }
}
void sigsegv_handler(int signum)
{
     posix_signal("SIGSEGV");
}
void sigfpe_handler(int signum)
{
     posix_signal("SIGFPE");
}

void reg_death_signal(char * Prog_path)
{
     sprintf( call_gdb_buff, "gdb %s %d", Prog_path, getpid() );
     signal(SIGSEGV, sigsegv_handler);
     signal(SIGFPE, sigfpe_handler);
}