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

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Message-ID: <555CD0E7.4040701@fb.com>
Date:	Wed, 20 May 2015 14:22:31 -0400
From:	Josef Bacik <jbacik@...com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	<linux-kernel@...r.kernel.org>, <kernel-team@...com>
Subject: Re: [PATCH 3/5] trace-cmd: lookup syscall names in profile

On 05/20/2015 02:00 PM, Steven Rostedt wrote:
> 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.
>

Maybe we should think about autoconf at some point?  Thanks,

Josef

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