1 /*
   2  * Copyright (c) 1997, 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
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_METHODKLASS_HPP
  26 #define SHARE_VM_OOPS_METHODKLASS_HPP
  27 
  28 #include "oops/klass.hpp"
  29 #include "oops/klassOop.hpp"
  30 #include "oops/methodOop.hpp"
  31 
  32 // a methodKlass is the klass of a methodOop
  33 
  34 class methodKlass : public Klass {
  35   friend class VMStructs;
  36  private:
  37   juint    _alloc_size;        // allocation profiling support
  38  public:
  39   // Testing
  40   bool oop_is_method() const { return true; }
  41 
  42   // Allocation
  43   DEFINE_ALLOCATE_PERMANENT(methodKlass);
  44   methodOop allocate(constMethodHandle xconst, AccessFlags access_flags,
  45                      TRAPS);
  46   static klassOop create_klass(TRAPS);
  47 
  48   // Sizing
  49   int oop_size(oop obj) const;
  50   int klass_oop_size() const     { return object_size(); }
  51 
  52   // Casting from klassOop
  53   static methodKlass* cast(klassOop k) {
  54     assert(k->klass_part()->oop_is_method(), "cast to methodKlass");
  55     return (methodKlass*) k->klass_part();
  56   }
  57 
  58   // Sizing
  59   static int header_size()       { return oopDesc::header_size() + sizeof(methodKlass)/HeapWordSize; }
  60   int object_size() const        { return align_object_size(header_size()); }
  61 
  62   // Garbage collection
  63   void oop_follow_contents(oop obj);
  64   int  oop_adjust_pointers(oop obj);
  65   bool oop_is_parsable(oop obj) const;
  66 
  67   // Parallel Scavenge and Parallel Old
  68   PARALLEL_GC_DECLS
  69 
  70   // Allocation profiling support
  71   juint alloc_size() const              { return _alloc_size; }
  72   void set_alloc_size(juint n)          { _alloc_size = n; }
  73 
  74   // Iterators
  75   int oop_oop_iterate(oop obj, OopClosure* blk);
  76   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
  77 
  78  public:
  79   // Printing
  80   void oop_print_value_on(oop obj, outputStream* st);
  81 #ifndef PRODUCT
  82   void oop_print_on      (oop obj, outputStream* st);
  83 #endif //PRODUCT
  84 
  85   // Verify operations
  86   const char* internal_name() const;
  87   void oop_verify_on(oop obj, outputStream* st);
  88   bool oop_partially_loaded(oop obj) const;
  89   void oop_set_partially_loaded(oop obj);
  90 };
  91 
  92 #endif // SHARE_VM_OOPS_METHODKLASS_HPP