This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
Re: [rfc] Allow xfer_partial to signal EOF out of band
- From: Mark Kettenis <mark dot kettenis at xs4all dot nl>
- To: drow at false dot org
- Cc: gdb-patches at sourceware dot org
- Date: Thu, 22 Jun 2006 20:12:50 +0200 (CEST)
- Subject: Re: [rfc] Allow xfer_partial to signal EOF out of band
- References: <20060622033609.GA28010@nevyn.them.org>
> Date: Wed, 21 Jun 2006 23:36:09 -0400
> From: Daniel Jacobowitz <drow@false.org>
>
> This patch adds a mechanism for to_xfer_partial to signal that it's done.
> I didn't implement the new mechanism for any other targets besides remote;
> it could easily be done for e.g. procfs_read_auxv, but the turnaround time
> is such that it's not a big deal either way. For the remote protocol,
> where there's an extra round trip to the remote link, I set *no_more if
> the target tells me to.
I don't like this at all. I think target_read_partial already has
enough arguments. And having read-like function calls return zero on
EOF is a well-established practice.
> Any comments on this? Otherwise, I'll commit it after qXfer:auxv:read.
> This is the patch which actually saves one packet whenever a remote object
> is transferred.
Does that really impact performance? If it does, I think you should
add some state to the remote protocol and use that to prevent it from
sending a packet.
Mark