8352422: [ubsan] Out-of-range reported in ciMethod.cpp:917:20: runtime error: 2.68435e+09 is outside the range of representable values of type 'int'

Reviewed-by: epeter, dlong

Author: marc-chevalier

src/hotspot/share/ci/ciMethod.cpp

@@ -914,8 +914,14 @@ int ciMethod::scale_count(int count, float prof_factor) {
       method_life = counter_life;
     }
     if (counter_life > 0) {
-      count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
-      count = (count > 0) ? count : 1;
+      double count_d = (double)count * prof_factor * method_life / counter_life + 0.5;
+      if (count_d >= static_cast<double>(INT_MAX)) {
+        // Clamp in case of overflowing int range.
+        count = INT_MAX;
+      } else {
+        count = int(count_d);
+        count = (count > 0) ? count : 1;
+      }
     } else {
       count = 1;
     }