src/share/vm/memory/cardTableModRefBS.cpp

rev 4973 : imported patch change-yg-card-value.diff
rev 4975 : imported patch refactor-and-sparc.diff

*** 461,470 ****
--- 461,476 ----
    jbyte val = _byte_map[card_index];
    // It's already processed
    if ((val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val()) {
      return false;
    }
+ 
+   if  (val == g1_young_gen) {
+     // the card is for a young gen region. We don't need to keep track of all pointers into young
+     return false;
+   }
+ 
    // Cached bit can be installed either on a clean card or on a claimed card.
    jbyte new_val = val;
    if (val == clean_card_val()) {
      new_val = (jbyte)deferred_card_val();
    } else {
*** 730,739 ****
--- 736,749 ----
  }
  
  void CardTableModRefBS::verify_dirty_region(MemRegion mr) {
    verify_region(mr, dirty_card, true /* val_equals */);
  }
+ 
+ void CardTableModRefBS::verify_g1_young_region(MemRegion mr) {
+   verify_region(mr, g1_young_gen,  true);
+ }
  #endif
  
  void CardTableModRefBS::print_on(outputStream* st) const {
    st->print_cr("Card table byte_map: [" INTPTR_FORMAT "," INTPTR_FORMAT "] byte_map_base: " INTPTR_FORMAT,
                 _byte_map, _byte_map + _byte_map_size, byte_map_base);