linux-kernel - [PATCH 7/8] perf record: Use strerror

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Message-ID: <20140814022040.3140.9378.stgit@kbuild-fedora.novalocal>
Date:	Thu, 14 Aug 2014 02:20:40 +0000
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Naohiro Aota <naota@...sp.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung@...nel.org>
Subject: [PATCH 7/8] perf record: Use strerror_r instead of strerror

Use strerror_r instead of strerror in error messages
for thread-safety.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
---
 tools/perf/builtin-record.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4db670d..87e28a4 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -161,7 +161,7 @@ try_again:
 
 	if (perf_evlist__apply_filters(evlist)) {
 		error("failed to set filter with %d (%s)\n", errno,
-			strerror(errno));
+			strerror_r(errno, msg, sizeof(msg)));
 		rc = -1;
 		goto out;
 	}
@@ -175,7 +175,8 @@ try_again:
 			       "(current value: %u)\n", opts->mmap_pages);
 			rc = -errno;
 		} else {
-			pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno));
+			pr_err("failed to mmap with %d (%s)\n", errno,
+				strerror_r(errno, msg, sizeof(msg)));
 			rc = -errno;
 		}
 		goto out;
@@ -480,7 +481,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 	}
 
 	if (forks && workload_exec_errno) {
-		char msg[512];
+		char msg[STRERR_BUFSIZE];
 		const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 		pr_err("Workload failed: %s\n", emsg);
 		err = -1;

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