Re: How gdb attach command works?

[Krishan Malik]

Hi, Gaurav

man page of ptrace will have all the answers.

#####################################################################
PTRACE(2)                  Linux Programmer’s Manual
PTRACE(2)

NAME
       ptrace - process trace

SYNOPSIS
       #include <sys/ptrace.h>

       long ptrace(enum __ptrace_request request, pid_t pid,
                   void *addr, void *data);

DESCRIPTION
       The ptrace() system call provides a means by which a parent process
may
       observe and control the execution of another process, and  examine
and
       change its core image and registers.  It is primarily used to
implement
       breakpoint debugging and system call tracing.
###################################################################

Thanks
Sri

On Wed, Oct 7, 2009 at 11:35 AM, Gaurav Aggarwal <grv.aggar...@gmail.com>wrote:

> Hey All,
>
> I do have a doubt not exactly on the kernel side but how exactly the 'gdb
> attach' command works? Isn't this violates the OS 'memory protection'
> objective of prevent a process from accessing memory that has not been
> allocated to it and hence to interfere with other processes memory space?
>
> --
> Regards,
> Gaurav Aggarwal
>



-- 
SK Malik