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perf util: Replace strerror with strerror_r for thread-safety

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Replaces all strerror with strerror_r in util for making the perf lib
thread-safe.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140814022236.3545.3367.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu
2014-08-14 02:22:36 +00:00
committed by Arnaldo Carvalho de Melo
parent 5f03cba415
commit 6e81c74cbf
8 changed files with 36 additions and 14 deletions
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6
tools/perf/util/cloexec.c
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@@ -3,6 +3,7 @@
#include "../perf.h"
#include "cloexec.h"
#include "asm/bug.h"
#include "debug.h"
static unsigned long flag = PERF_FLAG_FD_CLOEXEC;
@@ -18,6 +19,7 @@ static int perf_flag_probe(void)
int err;
int cpu;
pid_t pid = -1;
char sbuf[STRERR_BUFSIZE];
cpu = sched_getcpu();
if (cpu < 0)
@@ -42,7 +44,7 @@ static int perf_flag_probe(void)
WARN_ONCE(err != EINVAL && err != EBUSY,
"perf_event_open(..., PERF_FLAG_FD_CLOEXEC) failed with unexpected error %d (%s)\n",
err, strerror(err));
err, strerror_r(err, sbuf, sizeof(sbuf)));
/* not supported, confirm error related to PERF_FLAG_FD_CLOEXEC */
fd = sys_perf_event_open(&attr, pid, cpu, -1, 0);
@@ -50,7 +52,7 @@ static int perf_flag_probe(void)
if (WARN_ONCE(fd < 0 && err != EBUSY,
"perf_event_open(..., 0) failed unexpectedly with error %d (%s)\n",
err, strerror(err)))
err, strerror_r(err, sbuf, sizeof(sbuf))))
return -1;
close(fd);