src/share/vm/memory/cardTableRS.cpp

rev 7214 : imported patch remove_n_gen
rev 7215 : imported patch remove_levels
rev 7216 : imported patch cleanup

*** 54,69 ****
  #else
    _ct_bs = new CardTableModRefBSForCTRS(whole_heap, max_covered_regions);
  #endif
    _ct_bs->initialize();
    set_bs(_ct_bs);
!   _last_cur_val_in_gen = NEW_C_HEAP_ARRAY3(jbyte, GenCollectedHeap::max_gens + 1,
                           mtGC, CURRENT_PC, AllocFailStrategy::RETURN_NULL);
    if (_last_cur_val_in_gen == NULL) {
      vm_exit_during_initialization("Could not create last_cur_val_in_gen array.");
    }
!   for (int i = 0; i < GenCollectedHeap::max_gens + 1; i++) {
      _last_cur_val_in_gen[i] = clean_card_val();
    }
    _ct_bs->set_CTRS(this);
  }
  
--- 54,72 ----
  #else
    _ct_bs = new CardTableModRefBSForCTRS(whole_heap, max_covered_regions);
  #endif
    _ct_bs->initialize();
    set_bs(_ct_bs);
!   // max_gens is really GenCollectedHeap::heap()->gen_policy()->number_of_generations()
!   // (which always is 2), but GenCollectedHeap has not been initialized yet.
!   int max_gens = 2;
!   _last_cur_val_in_gen = NEW_C_HEAP_ARRAY3(jbyte, max_gens + 1,
                           mtGC, CURRENT_PC, AllocFailStrategy::RETURN_NULL);
    if (_last_cur_val_in_gen == NULL) {
      vm_exit_during_initialization("Could not create last_cur_val_in_gen array.");
    }
!   for (int i = 0; i < max_gens + 1; i++) {
      _last_cur_val_in_gen[i] = clean_card_val();
    }
    _ct_bs->set_CTRS(this);
  }
  
*** 113,123 ****
    }
  }
  
  void CardTableRS::younger_refs_iterate(Generation* g,
                                         OopsInGenClosure* blk) {
!   _last_cur_val_in_gen[g->level()+1] = cur_youngergen_card_val();
    g->younger_refs_iterate(blk);
  }
  
  inline bool ClearNoncleanCardWrapper::clear_card(jbyte* entry) {
    if (_is_par) {
--- 116,126 ----
    }
  }
  
  void CardTableRS::younger_refs_iterate(Generation* g,
                                         OopsInGenClosure* blk) {
!   _last_cur_val_in_gen[2 /* Number of generations */] = cur_youngergen_card_val();
    g->younger_refs_iterate(blk);
  }
  
  inline bool ClearNoncleanCardWrapper::clear_card(jbyte* entry) {
    if (_is_par) {
*** 311,332 ****
  #endif
    _ct_bs->non_clean_card_iterate_possibly_parallel(sp, urasm, cl, this);
  }
  
  void CardTableRS::clear_into_younger(Generation* old_gen) {
!   assert(old_gen->level() == 1, "Should only be called for the old generation");
    // The card tables for the youngest gen need never be cleared.
    // There's a bit of subtlety in the clear() and invalidate()
    // methods that we exploit here and in invalidate_or_clear()
    // below to avoid missing cards at the fringes. If clear() or
    // invalidate() are changed in the future, this code should
    // be revisited. 20040107.ysr
    clear(old_gen->prev_used_region());
  }
  
  void CardTableRS::invalidate_or_clear(Generation* old_gen) {
!   assert(old_gen->level() == 1, "Should only be called for the old generation");
    // Invalidate the cards for the currently occupied part of
    // the old generation and clear the cards for the
    // unoccupied part of the generation (if any, making use
    // of that generation's prev_used_region to determine that
    // region). No need to do anything for the youngest
--- 314,337 ----
  #endif
    _ct_bs->non_clean_card_iterate_possibly_parallel(sp, urasm, cl, this);
  }
  
  void CardTableRS::clear_into_younger(Generation* old_gen) {
!   assert(old_gen == GenCollectedHeap::heap()->old_gen(),
!          "Should only be called for the old generation");
    // The card tables for the youngest gen need never be cleared.
    // There's a bit of subtlety in the clear() and invalidate()
    // methods that we exploit here and in invalidate_or_clear()
    // below to avoid missing cards at the fringes. If clear() or
    // invalidate() are changed in the future, this code should
    // be revisited. 20040107.ysr
    clear(old_gen->prev_used_region());
  }
  
  void CardTableRS::invalidate_or_clear(Generation* old_gen) {
!   assert(old_gen == GenCollectedHeap::heap()->old_gen(),
!          "Should only be called for the old generation");
    // Invalidate the cards for the currently occupied part of
    // the old generation and clear the cards for the
    // unoccupied part of the generation (if any, making use
    // of that generation's prev_used_region to determine that
    // region). No need to do anything for the youngest
*** 388,407 ****
    CardTableRS* _ct;
  public:
    VerifyCTGenClosure(CardTableRS* ct) : _ct(ct) {}
    void do_generation(Generation* gen) {
      // Skip the youngest generation.
!     if (gen->level() == 0) return;
      // Normally, we're interested in pointers to younger generations.
      VerifyCTSpaceClosure blk(_ct, gen->reserved().start());
      gen->space_iterate(&blk, true);
    }
  };
  
  void CardTableRS::verify_space(Space* s, HeapWord* gen_boundary) {
    // We don't need to do young-gen spaces.
!   if (s->end() <= gen_boundary) return;
    MemRegion used = s->used_region();
  
    jbyte* cur_entry = byte_for(used.start());
    jbyte* limit = byte_after(used.last());
    while (cur_entry < limit) {
--- 393,416 ----
    CardTableRS* _ct;
  public:
    VerifyCTGenClosure(CardTableRS* ct) : _ct(ct) {}
    void do_generation(Generation* gen) {
      // Skip the youngest generation.
!     if (gen == GenCollectedHeap::heap()->young_gen()) {
!       return;
!     }
      // Normally, we're interested in pointers to younger generations.
      VerifyCTSpaceClosure blk(_ct, gen->reserved().start());
      gen->space_iterate(&blk, true);
    }
  };
  
  void CardTableRS::verify_space(Space* s, HeapWord* gen_boundary) {
    // We don't need to do young-gen spaces.
!   if (s->end() <= gen_boundary) {
!     return;
!   }
    MemRegion used = s->used_region();
  
    jbyte* cur_entry = byte_for(used.start());
    jbyte* limit = byte_after(used.last());
    while (cur_entry < limit) {