perf symbols: Consider unresolved DSOs in the dso__col_widt calculation

By using BITS_PER_LONG / 4, that is the number of chars that will be
used in such cases as the DSO "name".

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 23d5dfd4ed73..46563e16c3f5 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -676,6 +676,13 @@ int event__preprocess_sample(const event_t *self, struct perf_session *session,
                         dso__calc_col_width(al->map->dso);
 
                 al->sym = map__find_symbol(al->map, al->addr, filter);
+        } else {
+                const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
+
+                if (dsos__col_width < unresolved_col_width &&
+                    !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
+                    !symbol_conf.dso_list)
+                        dsos__col_width = unresolved_col_width;
         }
 
         if (symbol_conf.sym_list && al->sym &&