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

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Message-ID: <20140123022952.7206.79515.stgit@kbuild-fedora.yrl.intra.hitachi.co.jp>
Date:	Thu, 23 Jan 2014 02:29:52 +0000
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
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: [PATCH -tip 3/8] perf-probe: Show in what binaries/modules probes
 are set

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

# ./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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