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-rw-r--r--tools/perf/util/map.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index b19bcd3b7128..728129ac653a 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -15,6 +15,7 @@
#include "debug.h"
#include "machine.h"
#include <linux/string.h>
+#include "unwind.h"
static void __maps__insert(struct maps *maps, struct map *map);
@@ -311,6 +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);
@@ -744,9 +748,10 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
/*
* XXX This should not really _copy_ te maps, but refcount them.
*/
-int map_groups__clone(struct map_groups *mg,
+int map_groups__clone(struct thread *thread,
struct map_groups *parent, enum map_type type)
{
+ struct map_groups *mg = thread->mg;
int err = -ENOMEM;
struct map *map;
struct maps *maps = &parent->maps[type];
@@ -757,6 +762,11 @@ int map_groups__clone(struct map_groups *mg,
struct map *new = map__clone(map);
if (new == NULL)
goto out_unlock;
+
+ err = unwind__prepare_access(thread, new, NULL);
+ if (err)
+ goto out_unlock;
+
map_groups__insert(mg, new);
map__put(new);
}