Re: Mapping a piece of one process' addrspace to another?

From: Jesse Pollard (pollard@tomcat.admin.navo.hpc.mil)
Date: Wed Mar 07 2001 - 08:57:40 EST


Marcelo Tosatti <marcelo@conectiva.com.br>:
> On Wed, 7 Mar 2001, Alexander Viro wrote:
>
> >
> >
> > You are reinventing the wheel.
> > man ptrace (see PTRACE_{PEEK,POKE}{TEXT,DATA} and PTRACE_{ATTACH,CONT,DETACH})
>
> With ptrace data will be copied twice. As far as I understood, Jeremy
> wants to avoid that.

The the only way left would be to mmap a file. The second process could
mmap the same file to put data.I believe the buffers holding the data
would be shared between the two processes.

How the first process detects that I don't know (semaphore? signal?).

-------------------------------------------------------------------------
Jesse I Pollard, II
Email: pollard@navo.hpc.mil

Any opinions expressed are solely my own.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:22 EST