linux-kernel - [PATCH 4/9] perf symbols: Handle NULL dso in dso__name

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Message-Id: <1333123764-15662-5-git-send-email-acme@infradead.org>
Date:	Fri, 30 Mar 2012 13:09:19 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, David Miller <davem@...emloft.net>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 4/9] perf symbols: Handle NULL dso in dso__name_len

From: David Miller <davem@...emloft.net>

We should use "[unknown]" in this case, in concert with the code in
_hist_entry__dso_snprintf().

Otherwise we'll crash when recomputing the histogram column lengths in
hists__calc_col_len().

Signed-off-by: David S. Miller <davem@...emloft.net>
Link: http://lkml.kernel.org/r/20120325.162822.2267799792062571623.davem@davemloft.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/symbol.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index d9e995b..c0a028c 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -50,6 +50,8 @@ struct symbol_conf symbol_conf = {
 
 int dso__name_len(const struct dso *dso)
 {
+	if (!dso)
+		return strlen("[unknown]");
 	if (verbose)
 		return dso->long_name_len;
 
-- 
1.7.9.2.358.g22243

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