linux-kernel - [PATCH -tip v2 4/6] perf script: print DSOs and symbols for BTS branch

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Date:	Sun, 17 Jul 2011 18:31:03 +0900
From:	Akihiro Nagai <akihiro.nagai.hw@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	David Ahern <dsahern@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	yrl.pp-manager.tt@...achi.com,
	Akihiro Nagai <akihiro.nagai.hw@...achi.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	David Ahern <dsahern@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: [PATCH -tip v2 4/6] perf script: print DSOs and symbols for BTS
 branch_from addr

Print DSOs and symbols for branch_from address of BTS.
BTS records branch_from address in 'addr' fields,
and branch_to address in 'ip' field. Latest perf-script
resolves DSOs and symbols only for 'ip' field.
This patch resolves them for 'addr' field too.

# perf script -f ip,addr,dso,sym
3f03e016b0 (unknown) ([kernel.kallsyms]) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e016b0    _start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04b80 _dl_start (/lib64/ld-2.14.so)       3f03e016b3 _start (/lib64/ld-2.14.so)
3f03e04b80 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04ba6 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04bad _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
3f03e04c1d _dl_start (/lib64/ld-2.14.so)       3f03e04bfb _dl_start (/lib64/ld-2.14.so)
[snip]

Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@...achi.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
---

 tools/perf/builtin-script.c |    8 +++++++-
 tools/perf/util/event.c     |    2 +-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 2356198..7708d89 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -309,6 +309,12 @@ static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 	     (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
 		return true;
 
+	/* BTS Events */
+	if ((attr->type == PERF_TYPE_HARDWARE) &&
+	    (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
+	    (attr->sample_period == 1))
+		return true;
+
 	return false;
 }
 
@@ -328,7 +334,7 @@ static void print_sample_addr(union perf_event *event,
 
 	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 			      event->ip.pid, sample->addr, &al);
-	/* try to resolve for user space */
+	/* try to resolve addr_location for user space */
 	if (!al.map)
 		thread__find_addr_map(thread, session, PERF_RECORD_MISC_USER,
 			MAP__FUNCTION, event->ip.pid, sample->addr, &al);
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 49a9315..c541d02 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -771,7 +771,7 @@ int perf_event__preprocess_sample(const union perf_event *event,
 
 	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 			      event->ip.pid, event->ip.ip, al);
-	/* try to resolve for user space */
+	/* try to resolve addr_location for user space */
 	if (!al->map)
 		thread__find_addr_map(thread, session, PERF_RECORD_MISC_USER,
 				MAP__FUNCTION, event->ip.pid, event->ip.ip, al);

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