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From: Oleg Nesterov <oleg@redhat.com>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: archer@sourceware.org, Roland McGrath <roland@redhat.com>
Subject: Re: Q: who maintains the STOPPED/RUNNING state?
Date: Wed, 21 Jul 2010 10:51:00 -0000	[thread overview]
Message-ID: <20100721104849.GA13299@redhat.com> (raw)
In-Reply-To: <20100721101826.GA12176@redhat.com>

On 07/21, Oleg Nesterov wrote:
>
> On 07/20, Frank Ch. Eigler wrote:
> >
> > Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> writes:
> >
> > > [...]
> > > Who maintains this state? gdb, server, both? To illustrate, suppose
> > > that ugdb receives
> > > 	$c			<--- resumes the tracee
> > > 	$g			<--- asks general registers
> > > What should ugdb do?
> >
> > Even if the protocol documentation theoretically permits this,
> > if actual gdb does not send it, and actual gdbserver does not
> > specifically handle it, you don't have to worry about it.
>
> I'd like to know how can I check that gdb can't do this.

It can. It doesn't send exactly '$g' because it has its own cache,
but it can send, say, '$m' when the tracee is running. gdbserver
returns E01 in this case.

> so I'll assume ugdb should return E01.

Yes.


Hmm. Speaking of '$m', I looked in the sources and noticed by
accident that read_inferior_memory() "hides" the breakpoints
inserted by gdbserver.

Of course, this is not documented in gdb.info too.

Oleg.

  reply	other threads:[~2010-07-21 10:51 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-16 20:54 Q: mutlithreaded tracees && clone/exit Oleg Nesterov
2010-07-16 21:40 ` Roland McGrath
2010-07-18 17:51   ` Oleg Nesterov
2010-07-18 18:04     ` Oleg Nesterov
2010-07-18 20:22     ` Roland McGrath
2010-07-19 13:44 ` BUG: add_thread_silent()->switch_to_thread(minus_one_ptid) is wrong Oleg Nesterov
2010-07-19 15:36   ` Oleg Nesterov
2010-07-19 16:01 ` Q: mutlithreaded tracees && clone/exit Jan Kratochvil
2010-07-19 22:57   ` Roland McGrath
2010-07-20 13:18   ` Oleg Nesterov
2010-07-20 14:04     ` BUG? gdb, non-stop && c -a Oleg Nesterov
2010-07-20 14:12       ` Jan Kratochvil
2010-07-20 14:49         ` Oleg Nesterov
2010-07-20 15:08           ` Jan Kratochvil
2010-07-20 15:28             ` Oleg Nesterov
2010-07-20 19:43         ` Roland McGrath
2010-07-21  7:59           ` Oleg Nesterov
2010-07-21  8:10             ` Jan Kratochvil
2010-07-21 11:12               ` Oleg Nesterov
2010-07-20 14:21     ` Q: mutlithreaded tracees && clone/exit Jan Kratochvil
2010-07-20 15:09       ` Oleg Nesterov
2010-07-20 19:41     ` Roland McGrath
2010-07-21  8:32       ` Oleg Nesterov
2010-07-20 14:43 ` Q: who maintains the STOPPED/RUNNING state? Oleg Nesterov
     [not found]   ` <y0mk4ophmvn.fsf@fche.csb>
2010-07-21 10:20     ` Oleg Nesterov
2010-07-21 10:51       ` Oleg Nesterov [this message]
2010-07-21 17:06 ` Q: multiple inferiors, all-stop && vCont Oleg Nesterov
2010-07-21 20:42   ` Roland McGrath
2010-07-23 17:33     ` Oleg Nesterov
2010-07-26 14:30       ` Oleg Nesterov
2010-07-26 16:06         ` Oleg Nesterov
2010-07-28 18:19         ` gdbstub initial code, another approach Oleg Nesterov
2010-07-29 21:38           ` Frank Ch. Eigler
2010-07-30 13:00             ` Oleg Nesterov
2010-07-30 13:16               ` Frank Ch. Eigler
2010-07-30 15:01                 ` Oleg Nesterov
2010-07-30 13:25               ` Jan Kratochvil
2010-07-30 14:44                 ` Oleg Nesterov
2010-07-30 15:20                   ` Jan Kratochvil
2010-08-02 12:54                     ` Oleg Nesterov
2010-08-03 13:55                       ` Jan Kratochvil
2010-07-30 17:59                 ` Tom Tromey
2010-08-02 18:25           ` Oleg Nesterov
2010-08-02 23:54           ` Jan Kratochvil
2010-08-03 12:27             ` Q: %Stop && gdb crash Oleg Nesterov
2010-08-03 13:17               ` Oleg Nesterov
2010-08-03 19:57                 ` Kevin Buettner
2010-08-04 19:42                   ` Oleg Nesterov
2010-08-04 23:32                     ` Kevin Buettner
2010-08-05 18:24                       ` Oleg Nesterov
2010-08-03 13:36               ` Jan Kratochvil
2010-08-03 15:09                 ` Oleg Nesterov
2010-08-03 12:39         ` Q: multiple inferiors, all-stop && vCont Jan Kratochvil
2010-08-03 14:32           ` Oleg Nesterov
2010-08-03 15:55             ` Jan Kratochvil
2010-08-03 16:56               ` Oleg Nesterov
2010-08-03 18:37                 ` Jan Kratochvil
2010-08-18 17:07           ` Jan Kratochvil
2010-08-18 19:22             ` Roland McGrath

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