我有一个作为僵尸进程运行的程序。我想调试它。但是我得到了一个 gdb 错误。
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.
我的代码创建了僵尸进程：
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;
}