From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Pedro Alves <palves-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Andrey Vagin <avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
criu-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
"Paul E. McKenney"
<paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Dave Jones <davej-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Michael Kerrisk (man-pages)"
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Pavel Emelyanov <xemul-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: Re: [PATCH] ptrace: add ability to retrieve signals without removing them from a queue
Date: Fri, 15 Feb 2013 20:43:56 +0100 [thread overview]
Message-ID: <20130215194356.GA12413@redhat.com> (raw)
In-Reply-To: <511E8223.6010506-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On 02/15, Pedro Alves wrote:
>
> Not sure I'm reading the patch right, but it looks like GDB would
> be able to use this as alternative to PTRACE_GET_SIGINFO variant
No, it is different. PTRACE_GETSIGINFO reports the siginfo for the signal
which was already dequeued (ignoring the fact ->last_siginfo != NULL doesn't
necessarily mean we report a signal), while this patch allows to look at
the pending signals which were not reported yet.
> I wouldn't mind if this was added unconditionally
> instead of wrapped on CONFIG_CHECKPOINT_RESTORE.
I agree. If you think gdb can use this new feature, CONFIG_ can go away.
> We'd miss the poke
> variant, but that looks like something that could be always be added
> later.
Yes. _POKE_ or _QUEUE_ or _DEQUEUE_, we can add more features if user-
space wants them.
Oleg.
next prev parent reply other threads:[~2013-02-15 19:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-13 15:16 [PATCH] ptrace: add ability to retrieve signals without removing them from a queue Andrey Vagin
[not found] ` <1360768595-31943-1-git-send-email-avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
2013-02-13 16:06 ` Oleg Nesterov
2013-02-15 18:44 ` Pedro Alves
[not found] ` <511E8223.6010506-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-02-15 19:43 ` Oleg Nesterov [this message]
[not found] ` <20130215194356.GA12413-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-02-15 19:53 ` Pedro Alves
2013-02-15 20:03 ` Pedro Alves
[not found] ` <511E9480.5070202-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-02-19 9:39 ` Andrey Wagin
2013-02-19 12:15 ` Michael Kerrisk (man-pages)
[not found] ` <CAKgNAkicAGEkvNFnSso__wK6QKao8jyDu5yuRmeyUOeaXLGChw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-19 17:53 ` Pavel Emelyanov
2013-02-19 19:34 ` Oleg Nesterov
[not found] ` <20130219193424.GA9606-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-02-19 19:47 ` Pavel Emelyanov
[not found] ` <5123D6D6.7010904-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2013-02-20 22:37 ` Oleg Nesterov
[not found] ` <20130220223703.GB16194-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-02-21 10:30 ` Pavel Emelyanov
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