2

ゾンビプロセスとして実行するプログラムがあります。デバッグしたいです。しかし、gdbエラーが発生しました。

mobile:/usr/local/ads5/bin# ps axf | grep ads_resolver
 5583 pts/2    S      0:00 ./ads_resolver main.cfg
 5584 pts/2    Zl     0:36  \_ [ads_resolver] <defunct>

mobile:/usr/local/ads5/bin# gdb ads_resolver 5584
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
Attaching to program: /usr/local/ads5/bin/ads_resolver, process 5584
ptrace: Operation not permitted.
/usr/local/ads5/bin/5584: No such file or directory.
(gdb) info threads
No registers.

ゾンビプロセスを作成する私のコードがあります：

template < class T>
int Monitor < T >::Start()
{
    pid_t pid;
    pid = fork();
    if(pid == 0)
    {
        IgnoreSignal::IgnoreDaemon();
        signal(SIGCHLD,Monitor<T>::ReStart);

        pid = fork();
        if(pid == 0)
        {
            IgnoreSignal::IgnoreAll();
            T worker;
            worker.Run();
        }
        while(1)
        {
            sleep(60);
        }
    }
    return 0; 
}
4

1 に答える 1

7

A zombie process has completed execution but the operating system is waiting for the parent to call wait(). This is just a status or a flag - the process no longer "exists" in terms of being executable.

So no it would not be possible for gdb to connect to a process that is no longer executing including a zombie process.

http://en.wikipedia.org/wiki/Zombie_process

于 2011-05-17T05:17:58.363 に答える