perf util: Hint missing file when tool tips fail to load

Besides memory allocation failure, tips.txt may fail to load because the
file is not found (a more likely cause).

Communicate that to the user in tips failure warning.

Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Que <sque@chromium.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170412064919.92449-5-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index d8b45cea54d08233c3d743cc38c6c0ef7af90328..6097d87429e2b2d14f19c34e5249434eb9b1c65a 100644 (file)
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -696,7 +696,8 @@ const char *perf_tip(const char *dirpath)
 
        tips = strlist__new("tips.txt", &conf);
        if (tips == NULL)
-               return errno == ENOENT ? NULL : "Tip: get more memory! ;-p";
+               return errno == ENOENT ? NULL :
+                       "Tip: check path of tips.txt or get more memory! ;-p";
 
        if (strlist__nr_entries(tips) == 0)
                goto out;