[PATCH 6/8] perf trace: Use strerror_r instead of strerror

[Masami Hiramatsu]

Use strerror_r instead of strerror in error message
for thead-safety.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
---
 tools/perf/builtin-trace.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index d080b9c..a9e96ff 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1750,7 +1750,7 @@ static int trace__sys_exit(struct trace *trace, struct 
perf_evsel *evsel,
 signed_print:
                fprintf(trace->output, ") = %d", ret);
        } else if (ret < 0 && sc->fmt->errmsg) {
-               char bf[256];
+               char bf[STRERR_BUFSIZE];
                const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
                           *e = audit_errno_to_name(-ret);
 
@@ -2044,6 +2044,7 @@ static int trace__run(struct trace *trace, int argc, 
const char **argv)
        int err = -1, i;
        unsigned long before;
        const bool forks = argc > 0;
+       char sbuf[STRERR_BUFSIZE];
 
        trace->live = true;
 
@@ -2105,7 +2106,8 @@ static int trace__run(struct trace *trace, int argc, 
const char **argv)
 
        err = perf_evlist__mmap(evlist, trace->opts.mmap_pages, false);
        if (err < 0) {
-               fprintf(trace->output, "Couldn't mmap the events: %s\n", 
strerror(errno));
+               fprintf(trace->output, "Couldn't mmap the events: %s\n",
+                       strerror_r(errno, sbuf, sizeof(sbuf)));
                goto out_delete_evlist;
        }
 

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