1 /*
   2  * Copyright (c) 1998, 2009, 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 class constantPoolCacheKlass: public Klass {
  26   juint    _alloc_size;        // allocation profiling support
  27  public:
  28   // Dispatched klass operations
  29   bool oop_is_constantPoolCache() const          { return true; }
  30   int  oop_size(oop obj) const;
  31   int  klass_oop_size() const                    { return object_size(); }
  32 
  33   // Allocation
  34   DEFINE_ALLOCATE_PERMANENT(constantPoolCacheKlass);
  35   constantPoolCacheOop allocate(int length, bool is_conc_safe, TRAPS);
  36   static klassOop create_klass(TRAPS);
  37 
  38   // Casting from klassOop
  39   static constantPoolCacheKlass* cast(klassOop k) {
  40     assert(k->klass_part()->oop_is_constantPoolCache(), "cast to constantPoolCacheKlass");
  41     return (constantPoolCacheKlass*)k->klass_part();
  42   }
  43 
  44   // Sizing
  45   static int header_size()       { return oopDesc::header_size() + sizeof(constantPoolCacheKlass)/HeapWordSize; }
  46   int object_size() const        { return align_object_size(header_size()); }
  47 
  48   // Garbage collection
  49   void oop_follow_contents(oop obj);
  50   int oop_adjust_pointers(oop obj);
  51   virtual bool oop_is_conc_safe(oop obj) const;
  52 
  53   // Parallel Scavenge and Parallel Old
  54   PARALLEL_GC_DECLS
  55 
  56   // Iterators
  57   int oop_oop_iterate(oop obj, OopClosure* blk);
  58   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
  59 
  60   // Allocation profiling support
  61   juint alloc_size() const              { return _alloc_size; }
  62   void set_alloc_size(juint n)          { _alloc_size = n; }
  63 
  64   // Printing
  65   void oop_print_value_on(oop obj, outputStream* st);
  66   void oop_print_on(oop obj, outputStream* st);
  67 
  68   // Verification
  69   const char* internal_name() const;
  70   void oop_verify_on(oop obj, outputStream* st);
  71 };