From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: newbie question: tracing userspace call/return sequences
Date: Sat, 7 Jan 2017 11:08:36 -0800
Message-ID: <20170107190835.GA26852@two.firstfloor.org>
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To: Namhyung Kim <namhyung@gmail.com>
Cc: Christian Convey <christian.convey@gmail.com>, Andi Kleen <andi@firstfloor.org>, linux-perf-users <linux-perf-users@vger.kernel.org>

> You can use uftrace for function tracing.  It doesn't have a hardware dependency
> but you need to rebuild your program with instrumentation enabled (like -pg
> or -finstrument-functions in gcc).
> 
> https://github.com/namhyung/uftrace

I have a similar tool here. 

http://github.com/andikleen/ftracer

But it's really far inferior to hardware tracing. Use the right tool for the
job.

-Andi