From: Nicholas Mc Guire <der.herr@hofr.at>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: David Daney <ddaney@caviumnetworks.com>,
Wu Zhangjin <wuzhangjin@gmail.com>,
linux-kernel@vger.kernel.org, linux-mips@linux-mips.org,
Thomas Gleixner <tglx@linutronix.de>,
Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH -v4 9/9] tracing: add function graph tracer support for MIPS
Date: Wed, 21 Oct 2009 20:17:05 +0200 [thread overview]
Message-ID: <20091021181705.GA5218@opentech.at> (raw)
In-Reply-To: <1256148562.18347.3264.camel@gandalf.stny.rr.com>
>
>
> We're not doing back traces. We need to modify the return of the
> function being called. Note, the above functions that end with ";" are
> leaf functions. Non leaf functions show "{" and end with "}".
>
> The trick here is to find a reliable way to modify the return address.
>
would it not more or less be the same thing if you used -finstrument-functions
then and provide a stub __cyg_profile_func_enter/exit initialized to an empty
function until you replace it during tracing. This does give you an overhead
when you are not tracing - but it would make the tracer implementation quite
generic.
hofrat
next prev parent reply other threads:[~2009-10-21 18:17 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1256135456.git.wuzhangjin@gmail.com>
2009-10-21 14:34 ` [PATCH -v4 1/9] tracing: convert trace_clock_local() as weak function Wu Zhangjin
2009-10-21 14:34 ` [PATCH -v4 2/9] MIPS: add mips_timecounter_read() to get high precision timestamp Wu Zhangjin
2009-10-21 14:34 ` [PATCH -v4 3/9] tracing: add MIPS specific trace_clock_local() Wu Zhangjin
2009-10-21 14:46 ` Steven Rostedt
2009-10-21 15:11 ` Wu Zhangjin
2009-10-21 14:34 ` [PATCH -v4 4/9] tracing: add static function tracer support for MIPS Wu Zhangjin
2009-10-21 15:24 ` Steven Rostedt
2009-10-22 17:47 ` Wu Zhangjin
2009-10-22 17:59 ` Steven Rostedt
2009-10-22 18:34 ` Wu Zhangjin
2009-10-22 18:34 ` David Daney
2009-10-22 19:13 ` Wu Zhangjin
[not found] ` <19168.49354.525249.654494@ropi.home>
2009-10-22 20:52 ` Steven Rostedt
2009-10-22 21:09 ` Frederic Weisbecker
2009-10-22 21:29 ` Adam Nemet
2009-10-22 21:55 ` Steven Rostedt
2009-10-23 1:09 ` Wu Zhangjin
2009-10-22 22:17 ` Richard Sandiford
2009-10-23 9:32 ` Wu Zhangjin
2009-10-23 22:48 ` [PATCH] MIPS: Add option to pass return address location to _mcount. Was: " David Daney
2009-10-24 9:12 ` Richard Sandiford
2009-10-24 15:53 ` Wu Zhangjin
2009-10-26 19:08 ` [PATCH] MIPS: Add option to pass return address location to _mcount David Daney
2009-10-27 1:04 ` Wu Zhangjin
2009-10-27 21:20 ` Richard Sandiford
2009-10-29 6:44 ` Wu Zhangjin
2009-10-29 16:32 ` David Daney
2009-10-29 18:11 ` David Daney
2009-10-23 7:21 ` [PATCH -v4 4/9] tracing: add static function tracer support for MIPS Wu Zhangjin
2009-10-21 14:34 ` [PATCH -v4 5/9] tracing: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST " Wu Zhangjin
2009-10-21 14:35 ` [PATCH -v4 6/9] tracing: add an endian argument to scripts/recordmcount.pl Wu Zhangjin
2009-10-21 15:26 ` Steven Rostedt
2009-10-21 14:35 ` [PATCH -v4 7/9] tracing: add dynamic function tracer support for MIPS Wu Zhangjin
2009-10-21 14:35 ` [PATCH -v4 8/9] tracing: not trace mips_timecounter_init() in MIPS Wu Zhangjin
2009-10-21 14:35 ` [PATCH -v4 9/9] tracing: add function graph tracer support for MIPS Wu Zhangjin
2009-10-21 15:21 ` Wu Zhangjin
2009-10-21 16:14 ` Steven Rostedt
2009-10-21 16:12 ` Steven Rostedt
2009-10-21 16:37 ` David Daney
2009-10-21 16:46 ` Steven Rostedt
2009-10-21 17:07 ` David Daney
2009-10-21 17:23 ` Steven Rostedt
2009-10-21 17:48 ` David Daney
2009-10-21 18:09 ` Steven Rostedt
2009-10-21 18:17 ` Nicholas Mc Guire [this message]
2009-10-21 18:34 ` Steven Rostedt
2009-10-21 18:25 ` David Daney
2009-10-22 11:38 ` Wu Zhangjin
2009-10-22 13:17 ` Steven Rostedt
2009-10-22 13:31 ` Wu Zhangjin
2009-10-22 15:20 ` Steven Rostedt
2009-10-22 15:59 ` David Daney
2009-10-22 16:11 ` Steven Rostedt
2009-10-22 16:16 ` David Daney
2009-10-22 18:00 ` Steven Rostedt
2009-10-22 17:39 ` Wu Zhangjin
2009-10-22 17:58 ` Steven Rostedt
[not found] ` <26008418.post@talk.nabble.com>
2009-10-25 10:48 ` Wu Zhangjin
2009-10-25 10:48 ` Wu Zhangjin
2009-10-25 13:37 ` Patrik Kluba
2009-10-25 13:37 ` Patrik Kluba
2009-10-25 14:22 ` Wu Zhangjin
2009-10-25 15:55 ` Richard Sandiford
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