src/hotspot/share/utilities/bitMap.cpp

@@ -682,10 +682,15 @@
 void BitMap::print_on_error(outputStream* st, const char* prefix) const {
   st->print_cr("%s[" PTR_FORMAT ", " PTR_FORMAT ")",
       prefix, p2i(map()), p2i((char*)map() + (size() >> LogBitsPerByte)));
 }
 
+void BitMap::write_to(bm_word_t* buffer, size_t buffer_size_in_bytes) const {
+  assert(buffer_size_in_bytes == size_in_bytes(), "must be");
+  memcpy(buffer, _map, size_in_bytes());
+}
+
 #ifndef PRODUCT
 
 void BitMap::print_on(outputStream* st) const {
   tty->print("Bitmap(" SIZE_FORMAT "):", size());
   for (idx_t index = 0; index < size(); index++) {