1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP
  26 #define SHARE_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP
  27 
  28 #include "gc/shared/c2/modRefBarrierSetC2.hpp"
  29 
  30 class CardTableBarrierSetC2: public ModRefBarrierSetC2 {
  31 protected:
  32   virtual void post_barrier(GraphKit* kit,
  33                             Node* ctl,
  34                             Node* store,
  35                             Node* obj,
  36                             Node* adr,
  37                             uint adr_idx,
  38                             Node* val,
  39                             BasicType bt,
  40                             bool use_precise) const;
  41 
  42   Node* byte_map_base_node(GraphKit* kit) const;
  43 
  44 public:
  45   virtual void clone(GraphKit* kit, Node* src_base, Node* dst_base, Node* countx, bool is_array) const;
  46   virtual bool is_gc_barrier_node(Node* node) const;
  47   virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
  48   virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
  49 
  50   bool use_ReduceInitialCardMarks() const;
  51 };
  52 
  53 #endif // SHARE_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP