1 /*
   2  * Copyright (c) 1998, 2010, 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
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  24 
  25 #ifndef SHARE_VM_OOPS_CPCACHEKLASS_HPP
  26 #define SHARE_VM_OOPS_CPCACHEKLASS_HPP
  27 
  28 #include "oops/arrayKlass.hpp"
  29 #include "oops/cpCacheOop.hpp"
  30 #include "oops/instanceKlass.hpp"
  31 
  32 class constantPoolCacheKlass: public Klass {
  33   juint    _alloc_size;        // allocation profiling support
  34  public:
  35   // Dispatched klass operations
  36   bool oop_is_constantPoolCache() const          { return true; }
  37   int  oop_size(oop obj) const;
  38   int  klass_oop_size() const                    { return object_size(); }
  39 
  40   // Allocation
  41   DEFINE_ALLOCATE_PERMANENT(constantPoolCacheKlass);
  42   constantPoolCacheOop allocate(int length, bool is_conc_safe, TRAPS);
  43   static klassOop create_klass(TRAPS);
  44 
  45   // Casting from klassOop
  46   static constantPoolCacheKlass* cast(klassOop k) {
  47     assert(k->klass_part()->oop_is_constantPoolCache(), "cast to constantPoolCacheKlass");
  48     return (constantPoolCacheKlass*)k->klass_part();
  49   }
  50 
  51   // Sizing
  52   static int header_size()       { return oopDesc::header_size() + sizeof(constantPoolCacheKlass)/HeapWordSize; }
  53   int object_size() const        { return align_object_size(header_size()); }
  54 
  55   // Garbage collection
  56   void oop_follow_contents(oop obj);
  57   int oop_adjust_pointers(oop obj);
  58   virtual bool oop_is_conc_safe(oop obj) const;
  59 
  60   // Parallel Scavenge and Parallel Old
  61   PARALLEL_GC_DECLS
  62 
  63   // Iterators
  64   int oop_oop_iterate(oop obj, OopClosure* blk);
  65   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
  66 
  67   // Allocation profiling support
  68   juint alloc_size() const              { return _alloc_size; }
  69   void set_alloc_size(juint n)          { _alloc_size = n; }
  70 
  71   // Printing
  72   void oop_print_value_on(oop obj, outputStream* st);
  73   void oop_print_on(oop obj, outputStream* st);
  74 
  75   // Verification
  76   const char* internal_name() const;
  77   void oop_verify_on(oop obj, outputStream* st);
  78 };
  79 
  80 #endif // SHARE_VM_OOPS_CPCACHEKLASS_HPP