linux-kernel - [PATCH 3/4] perf tools: Check return value of filename__read

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Date:	Thu, 20 Feb 2014 10:32:55 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Namhyung Kim <namhyung@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Cody P Schafer <cody@...ux.vnet.ibm.com>
Subject: [PATCH 3/4] perf tools: Check return value of filename__read_debuglink()

From: Stephane Eranian <eranian@...gle.com>

When dso__read_binary_type_filename() called, it doesn't check the
return value of filename__read_debuglink() so that it'll try to open
the debuglink file even if it doesn't exist.

Also fix return value of the filename__read_debuglink() as it always
return -1 regardless of the result.

Cc: Cody P Schafer <cody@...ux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
Stephane, can I add your s-o-b here?

 tools/perf/util/dso.c        | 4 ++--
 tools/perf/util/symbol-elf.c | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 4045d086d9d9..64453d63b971 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -45,8 +45,8 @@ int dso__read_binary_type_filename(const struct dso *dso,
 			debuglink--;
 		if (*debuglink == '/')
 			debuglink++;
-		filename__read_debuglink(dso->long_name, debuglink,
-					 size - (debuglink - filename));
+		ret = filename__read_debuglink(dso->long_name, debuglink,
+					       size - (debuglink - filename));
 		}
 		break;
 	case DSO_BINARY_TYPE__BUILD_ID_CACHE:
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 3e9f336740fa..8ac4a4fe2abd 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -506,6 +506,8 @@ int filename__read_debuglink(const char *filename, char *debuglink,
 	/* the start of this section is a zero-terminated string */
 	strncpy(debuglink, data->d_buf, size);
 
+	err = 0;
+
 out_elf_end:
 	elf_end(elf);
 out_close:
-- 
1.7.11.7

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