linux-kernel - Re: [PATCH 3/5] trace-cmd: lookup syscall names in profile

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Date:	Wed, 20 May 2015 14:00:29 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Josef Bacik <jbacik@...com>
Cc:	<linux-kernel@...r.kernel.org>, <kernel-team@...com>
Subject: Re: [PATCH 3/5] trace-cmd: lookup syscall names in profile

On Fri, 8 May 2015 15:29:02 -0400
Josef Bacik <jbacik@...com> wrote:

> When we profile syscall times we're just given the syscall number, not the name.
> This isn't helpful for human beings, so lookup the syscall names when we are
> printing out the information.  This uses the audit library to get this
> information, I'm not married to it, but it seems that any app that does this
> mapping has to scrape /usr/include/asm/unistd*.h to pull out the names, so might
> as well just use somebody elses work.
> 
> Signed-off-by: Josef Bacik <jbacik@...com>
> ---
>  Makefile        |  2 +-
>  trace-profile.c | 19 ++++++++++++++++---
>  2 files changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 63f7e79..402f711 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -160,7 +160,7 @@ bindir_relative_SQ = $(subst ','\'',$(bindir_relative))
>  plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
>  python_dir_SQ = $(subst ','\'',$(python_dir))
>  
> -LIBS = -L. -ltracecmd -ldl
> +LIBS = -L. -ltracecmd -ldl -laudit

This fails to compile for me because I don't have a audit-libs-devel
installed.

I'll keep this as is, but I'm going to add code to check for this
library, and go back to the default raw numbers if it doesn't exist.

-- Steve
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