linux-kernel - Re: [PATCH -tip 3/8] perf-probe: Show in what binaries/modules probes are set

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Message-ID: <20140123144909.GC17572@ghostprotocols.net>
Date:	Thu, 23 Jan 2014 11:49:09 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	"David A. Long" <dave.long@...aro.org>,
	yrl.pp-manager.tt@...achi.com, Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH -tip 3/8] perf-probe: Show in what binaries/modules
 probes are set

Em Thu, Jan 23, 2014 at 02:29:52AM +0000, Masami Hiramatsu escreveu:
> Show the name of binary file or modules in which the probes
> are set with --list option.
> 
> Without this change;
> 
> # ./perf probe -m drm drm_av_sync_delay
> # ./perf probe -x perf dso__load_vmlinux

Please add two spaces before lines starting with #, because 'git commit
--amend' asks you to:

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.

:-)

- Arnaldo
 
> # ./perf probe -l
>   probe:drm_av_sync_delay (on drm_av_sync_delay)
>   probe_perf:dso__load_vmlinux (on 0x000000000006d110)
> 
> With this change;
> 
> # ./perf probe -l
>   probe:drm_av_sync_delay (on drm_av_sync_delay in drm)
>   probe_perf:dso__load_vmlinux (on 0x000000000006d110 in /kbuild/ksrc/linux-3/tools/perf/perf)
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> ---
>  tools/perf/util/probe-event.c |   10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index 14c649df..2fb4486 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -1742,7 +1742,8 @@ static struct strlist *get_probe_trace_command_rawlist(int fd)
>  }
>  
>  /* Show an event */
> -static int show_perf_probe_event(struct perf_probe_event *pev)
> +static int show_perf_probe_event(struct perf_probe_event *pev,
> +				 const char *module)
>  {
>  	int i, ret;
>  	char buf[128];
> @@ -1758,6 +1759,8 @@ static int show_perf_probe_event(struct perf_probe_event *pev)
>  		return ret;
>  
>  	printf("  %-20s (on %s", buf, place);
> +	if (module)
> +		printf(" in %s", module);
>  
>  	if (pev->nargs > 0) {
>  		printf(" with");
> @@ -1795,7 +1798,8 @@ static int __show_perf_probe_events(int fd, bool is_kprobe)
>  			ret = convert_to_perf_probe_event(&tev, &pev,
>  								is_kprobe);
>  			if (ret >= 0)
> -				ret = show_perf_probe_event(&pev);
> +				ret = show_perf_probe_event(&pev,
> +							    tev.point.module);
>  		}
>  		clear_perf_probe_event(&pev);
>  		clear_probe_trace_event(&tev);
> @@ -1994,7 +1998,7 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
>  		group = pev->group;
>  		pev->event = tev->event;
>  		pev->group = tev->group;
> -		show_perf_probe_event(pev);
> +		show_perf_probe_event(pev, tev->point.module);
>  		/* Trick here - restore current event/group */
>  		pev->event = (char *)event;
>  		pev->group = (char *)group;
> 
--
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