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From: Steven Rostedt via lttng-dev <lttng-dev@lists.lttng.org>
To: ahmadkhorrami <ahmadkhorrami@ut.ac.ir>
Cc: Linux-trace Users <linux-trace-users@vger.kernel.org>,
	lttng-dev@lists.lttng.org, Namhyung Kim <namhyung@kernel.org>
Subject: Re: [lttng-dev] Capturing User-Level Function Calls/Returns
Date: Wed, 15 Jul 2020 14:28:49 -0400	[thread overview]
Message-ID: <20200715142849.0bfe909a@oasis.local.home> (raw)
Message-ID: <20200715182849.PnMhe-_CPv4Ee6WP9stRjl1bT1nJ95ovx_Hz3xDjycs@z> (raw)
In-Reply-To: <e9c7400ff0075f3beba2863c4432a905@ut.ac.ir>

On Wed, 15 Jul 2020 20:37:16 +0430
ahmadkhorrami <ahmadkhorrami@ut.ac.ir> wrote:

> Hi,
> What is the most efficient way to capture occurrence of a function 
> call/return of a binary program in userspace?
> It seems the answer is Uprobes. 1) Am I right?
> But Uprobes use "int" instruction which leads to a switch into kernel 
> mode. 2) Wouldn't it be better to avoid this transition?
> I'm looking forward to your reply and will be happy to read your 
> opinions.
> Regards.


Hi, I believe LTTng has utilities that can help you trace user space
programs.

I think there's also a users ftrace like utility that Namhyung was
working on. But I don't know where in the development that is.

-- Steve
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       reply	other threads:[~2020-07-15 18:35 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <e9c7400ff0075f3beba2863c4432a905@ut.ac.ir>
2020-07-15 18:28 ` Steven Rostedt [this message]
2020-07-15 18:28   ` Steven Rostedt via lttng-dev
2020-07-15 18:45   ` Mathieu Desnoyers
2020-07-15 18:45     ` [lttng-dev] " Mathieu Desnoyers via lttng-dev
2020-07-15 21:39     ` ahmadkhorrami
2020-07-15 21:39       ` [lttng-dev] " ahmadkhorrami via lttng-dev
2020-07-15 21:48       ` Steven Rostedt
2020-07-15 21:48         ` [lttng-dev] " Steven Rostedt via lttng-dev
2020-07-15 22:25         ` ahmadkhorrami
2020-07-15 22:25           ` [lttng-dev] " ahmadkhorrami via lttng-dev
2020-07-16  1:06         ` Michel Dagenais via lttng-dev
2020-07-16  1:06           ` [lttng-dev] " Michel Dagenais via lttng-dev
2020-07-16  1:49           ` Frank Ch. Eigler
2020-07-16  1:49             ` Frank Ch. Eigler via lttng-dev
2020-07-16 16:26             ` ahmadkhorrami
2020-07-16 16:26               ` ahmadkhorrami via lttng-dev
2020-07-16 16:20           ` ahmadkhorrami
2020-07-16 16:20             ` ahmadkhorrami via lttng-dev
2020-07-16 16:34           ` ahmadkhorrami
2020-07-16 16:34             ` ahmadkhorrami via lttng-dev
2020-07-16  1:04   ` Namhyung Kim
2020-07-16  1:04     ` [lttng-dev] " Namhyung Kim via lttng-dev
2020-07-16 16:07     ` ahmadkhorrami
2020-07-16 16:07       ` [lttng-dev] " ahmadkhorrami via lttng-dev

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