perf hists browser: Refuse 'a' hotkey on non symbolic views

We don't allocate the histogram data structures for --sort lists without
"sym", so, just like was done for the menu, don't try to annotate when
'a' is pressed, just warn the user about it.

Reported-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-27mjg02s2mbw8lfxqv7jpzec@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index af12e6f..4663dcb 100644 (file)
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -882,6 +882,13 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
                         */
                        goto out_free_stack;
                case 'a':
+                       if (!browser->has_symbols) {
+                               ui__warning(
+                       "Annotation is only available for symbolic views, "
+                       "include \"sym\" in --sort to use it.");
+                               continue;
+                       }
+
                        if (browser->selection == NULL ||
                            browser->selection->sym == NULL ||
                            browser->selection->map->dso->annotate_warned)