Hi,
I've another problem with my kernel module.
I want to stop the threads I'm monitoring when they are going to terminate
their execution in order to can restore them to a previous state.
To do this, I've substituted the function related with the sys_exit system
call with the following one:
static asmlinkage int cmc_sys_exit(int error_code)
{
if (current is one of the thread I'm monitoring){
send_sig(SIGSTOP,current,1);
return 0;
}
return original_sys_exit(error_code);
}
where original_sys_exit is the pointer to the original function.
After the executing of this function, things seems to go well, as all threads
stop the execution and do not terminate; but when they are resumed to a
previous state, sometimes not all threads restart the execution (someone
terminate) or can happen that all restart their execution from the previous
state but when they re-terminate their execution they not stop (as in the
first execution), they segfault and exit.
What goes wrong?
Thanks.
Vincenzo Mallozzi.
___________________________________
Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB
http://mail.yahoo.it
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
