From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Hyeoncheol Lee <hyc.lee@gmail.com>
Cc: masami.hiramatsu.pt@hitachi.com, linux-kernel@vger.kernel.org
Subject: Re: [QUESTION] Can uprobe_event support @ADDR, $retval, offs(FETCHARG)?
Date: Wed, 26 Sep 2012 10:12:38 +0530 [thread overview]
Message-ID: <20120926044238.GC27339@linux.vnet.ibm.com> (raw)
In-Reply-To: <CANFS6bZtOPe8XbsgC0V0encVLssFShWGhNLZQkCvEhKcNT946w@mail.gmail.com>
Hi Hyeoncheol,
> uprobe_event only supports %REG arguments. I think that memory fetch,
> return value fetch, memory dereference functions in
> kernel/trace/trace_probe.c are good for uprobe_event.
Yes, these will be good to have and is listed as todo.
> So with a little
> modification of parse_probe_arg(), uprobe_event can support @ADDR,
> $retval, offs(FETCHARGS) except @SYM, $stack, $stackN. Is it right?
For some of these like the @sym, trace_uprobe.c may not be the right
place because the kernel will not be able to decode user space symbols.
$retval needs uretprobes support
--
Thanks and Regards
Srikar
next prev parent reply other threads:[~2012-09-26 5:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-26 2:52 [QUESTION] Can uprobe_event support @ADDR, $retval, offs(FETCHARG)? Hyeoncheol Lee
2012-09-26 4:42 ` Srikar Dronamraju [this message]
2012-09-26 5:33 ` Masami Hiramatsu
2012-09-26 5:23 ` Srikar Dronamraju
2012-09-26 7:07 ` Hyeoncheol Lee
2012-09-26 6:55 ` Hyeoncheol Lee
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120926044238.GC27339@linux.vnet.ibm.com \
--to=srikar@linux.vnet.ibm.com \
--cc=hyc.lee@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=masami.hiramatsu.pt@hitachi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox