[Bug c++/30384] gdbserver get an error when father process exit

["hewei4321017 at 163 dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30384

--- Comment #3 from 贺伟 <hewei4321017 at 163 dot com> ---
Comment on attachment 14845
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14845
test code

#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <ostream>
#include <unistd.h>
#include <string.h>
#include<algorithm>
#include <assert.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <pthread.h>
#include <map>
#include <vector>
#include <sys/ptrace.h>
#include <sys/prctl.h>
#include <sys/user.h>
#include <sys/syscall.h>


using namespace std;
int main(int args, char* argv[], char* envp[])
{

    int g = 1;
    pid_t pid = fork();
    if (pid < 0) {
        return -1;
    } else if (pid == 0) {
        int i = 0;
        while (1) {
            int a = 3;
            i++;
            cout << "child:" << getpid() << endl;
            sleep(2);
        }

    } else if (pid > 0) {
        // cout << "father pid:"<<  getpid() << endl;

        int i = 0;
        while (i<5) {
            cout << "father:" << getpid() << endl;
            i++;
            sleep(2);
        }
        exit(0);

    }

    return 0;

}

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