diff options
| author | Masami Hiramatsu | 2016-07-19 01:12:41 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2016-07-18 19:46:34 -0300 |
| commit | e70493429bb1acaad829caae01c61dd7056fe671 (patch) | |
| tree | df9148b84c01f2ab1a24cfa4c1534368b316febd /tools/perf/util/map.c | |
| parent | 9a6c582d57a0fc37fa4e13a69d9129fb3d98a401 (diff) | |
perf probe: Warn unmatched function filter correctly
Warn unmatched function filter correctly instead of warning
"symbol-loading error", since that can be a filter issue.
From the technical point of view, this adds a filter chech in map__load
and if there is a filter, it returns -2 (filter-out), instead of -1
(error), and perf-probe checks it and change message.
E.g. without this fix:
# perf probe -F rt_sp*
no symbols found in [kernel.kallsyms], maybe install a debug package?
Failed to load symbols in kernel
With this fix:
# perf probe -F rt_sp*
no symbols passed the given filter.
Failed to find symbols matched to "rt_sp*"
Error: Failed to show functions.
Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/146885835596.16106.2293540792775552481.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/map.c')
| -rw-r--r-- | tools/perf/util/map.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index b39b12a1208d..728129ac653a 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -312,6 +312,9 @@ int map__load(struct map *map, symbol_filter_t filter) pr_warning("%.*s was updated (is prelink enabled?). " "Restart the long running apps that use it!\n", (int)real_len, name); + } else if (filter) { + pr_warning("no symbols passed the given filter.\n"); + return -2; /* Empty but maybe by the filter */ } else { pr_warning("no symbols found in %s, maybe install " "a debug package?\n", name); |