X-Git-Url: http://git.alex.org.uk

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 216e33a..e0a0970 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -230,6 +230,18 @@ struct hist_entry *__hists__add_entry(struct hists *hists,
 		if (!cmp) {
 			he->period += period;
 			++he->nr_events;
+
+			/* If the map of an existing hist_entry has
+			 * become out-of-date due to an exec() or
+			 * similar, update it.  Otherwise we will
+			 * mis-adjust symbol addresses when computing
+			 * the history counter to increment.
+			 */
+			if (he->ms.map != entry.ms.map) {
+				he->ms.map = entry.ms.map;
+				if (he->ms.map)
+					he->ms.map->referenced = true;
+			}
 			goto out;
 		}