1 /*
   2  * Copyright (c) 2000, 2006, 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 // a methodDataKlass is the klass of a methodDataOop
  26 
  27 class methodDataKlass : public Klass {
  28   friend class VMStructs;
  29  private:
  30   juint _alloc_size; // allocation profiling support
  31  public:
  32   // Testing
  33   bool oop_is_methodData() const { return true; }
  34 
  35   // Allocation
  36   DEFINE_ALLOCATE_PERMANENT(methodDataKlass);
  37   methodDataOop allocate(methodHandle method, TRAPS);
  38   static klassOop create_klass(TRAPS);
  39 
  40   // Sizing
  41   int oop_size(oop obj) const;
  42   int klass_oop_size() const { return object_size(); }
  43 
  44   // Casting from klassOop
  45   static methodDataKlass* cast(klassOop k) {
  46     assert(k->klass_part()->oop_is_methodData(), "cast to methodDataKlass");
  47     return (methodDataKlass*) k->klass_part();
  48   }
  49 
  50   // Sizing
  51   static int header_size() {
  52     return oopDesc::header_size() + sizeof(methodDataKlass)/wordSize;
  53   }
  54   int object_size() const {
  55     return align_object_size(header_size());
  56   }
  57 
  58   // Garbage collection
  59   void oop_follow_contents(oop obj);
  60   int  oop_adjust_pointers(oop obj);
  61   bool oop_is_parsable(oop obj) const;
  62 
  63   // Parallel Scavenge and Parallel Old
  64   PARALLEL_GC_DECLS
  65 
  66   // Allocation profiling support
  67   juint alloc_size() const { return _alloc_size; }
  68   void  set_alloc_size(juint n) { _alloc_size = n; }
  69 
  70   // Iterators
  71   int oop_oop_iterate(oop obj, OopClosure* blk);
  72   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
  73 
  74  public:
  75   // Printing
  76   void oop_print_value_on(oop obj, outputStream* st);
  77 #ifndef PRODUCT
  78   void oop_print_on      (oop obj, outputStream* st);
  79 #endif //PRODUCT
  80 
  81   // Verify operations
  82   const char* internal_name() const;
  83   void oop_verify_on(oop obj, outputStream* st);
  84 };