src/hotspot/share/utilities/bitMap.inline.hpp

rev 52445 : 8211926: Catastrophic size_t underflow in BitMap::*_large methods
Reviewed-by: kbarrett

@@ -235,14 +235,16 @@
   }
   return mask;
 }
 
 inline void BitMap::set_large_range_of_words(idx_t beg, idx_t end) {
+  assert(beg <= end, "underflow");
   memset(_map + beg, ~(unsigned char)0, (end - beg) * sizeof(bm_word_t));
 }
 
 inline void BitMap::clear_large_range_of_words(idx_t beg, idx_t end) {
+  assert(beg <= end, "underflow");
   memset(_map + beg, 0, (end - beg) * sizeof(bm_word_t));
 }
 
 inline BitMap::idx_t BitMap::word_index_round_up(idx_t bit) const {
   idx_t bit_rounded_up = bit + (BitsPerWord - 1);