linux-kernel - [tip:perf/core] perf callchain: Do not report zero address in unwind

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Date:	Sat, 22 Feb 2014 09:57:55 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, paulus@...ba.org,
	hpa@...or.com, mingo@...nel.org, a.p.zijlstra@...llo.nl,
	jean.pihet@...aro.org, namhyung@...nel.org, jolsa@...hat.com,
	fweisbec@...il.com, dsahern@...il.com, tglx@...utronix.de,
	cjashfor@...ux.vnet.ibm.com
Subject: [tip:perf/core] perf callchain:
  Do not report zero address in unwind

Commit-ID:  1cf0382af98f6365b01b59453fe18dffe3c73d2f
Gitweb:     http://git.kernel.org/tip/1cf0382af98f6365b01b59453fe18dffe3c73d2f
Author:     Jiri Olsa <jolsa@...hat.com>
AuthorDate: Tue, 7 Jan 2014 13:47:24 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 18 Feb 2014 09:34:48 -0300

perf callchain: Do not report zero address in unwind

We are not interested in zero addresses in callchain, do not report
them.

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Acked-by: Jean Pihet <jean.pihet@...aro.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jean Pihet <jean.pihet@...aro.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-8-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/unwind.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
index bff3209..3b70181 100644
--- a/tools/perf/util/unwind.c
+++ b/tools/perf/util/unwind.c
@@ -563,7 +563,7 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
 		unw_word_t ip;
 
 		unw_get_reg(&c, UNW_REG_IP, &ip);
-		ret = entry(ip, ui->thread, ui->machine, cb, arg);
+		ret = ip ? entry(ip, ui->thread, ui->machine, cb, arg) : 0;
 	}
 
 	unw_destroy_addr_space(addr_space);
--
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