在子进程中多次调用kill（）后，VM重新启动。

Question

#include <signal.h>
#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>

using namespace std;

void sigHandler(int sigNum){

    cout << "\nSignal has been sent." << endl;

}

int main(){

    pid_t PID = fork();

    if(PID == -1){

        perror("fork");
        exit(EXIT_FAILURE);

    }    

    if(PID == 0){

        cout << "\nChild will now send a signal to the parent process." << endl;

        kill(getppid(), SIGINT);    

        cout << "\nChild will now send a 2nd signal." << endl;

        kill(getppid(), SIGINT);

        cout << "\nChild will now send a 3rd signal." << endl;

        kill(getppid(), SIGINT);

    }else{

        struct sigaction action;

        action.sa_handler = sigHandler;

        sigemptyset(&action.sa_mask);    

        int checkErr = sigaction(SIGINT, &action, NULL);

        if(checkErr == -1){

            perror("sigaction");
            exit(EXIT_FAILURE);

        }

        wait(NULL);

        cout << "\nParent process is now finishing." << endl;

    }
}

对于这个特定的程序，我试图从子进程向父进程发送三次信号;但是，当我多次调用kill（）时，我的VM会重新启动。

有没有人有解决方案？

谢谢。