perf llvm: Use strerror_r instead of the thread unsafe strerror one

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-5njrq9dltckgm624omw9ljgu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index aab855f..33071d6 100644 (file)
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -98,11 +98,12 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)
        void *buf = NULL;
        FILE *file = NULL;
        size_t read_sz = 0, buf_sz = 0;
+       char serr[STRERR_BUFSIZE];
 
        file = popen(cmd, "r");
        if (!file) {
                pr_err("ERROR: unable to popen cmd: %s\n",
-                      strerror(errno));
+                      strerror_r(errno, serr, sizeof(serr)));
                return -EINVAL;
        }
 
@@ -136,7 +137,7 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)
 
        if (ferror(file)) {
                pr_err("ERROR: error occurred when reading from pipe: %s\n",
-                      strerror(errno));
+                      strerror_r(errno, serr, sizeof(serr)));
                err = -EIO;
                goto errout;
        }
@@ -370,7 +371,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
        if (nr_cpus_avail <= 0) {
                pr_err(
 "WARNING:\tunable to get available CPUs in this system: %s\n"
-"        \tUse 128 instead.\n", strerror(errno));
+"        \tUse 128 instead.\n", strerror_r(errno, serr, sizeof(serr)));
                nr_cpus_avail = 128;
        }
        snprintf(nr_cpus_avail_str, sizeof(nr_cpus_avail_str), "%d",