1 /*
   2  * Copyright (c) 2003, 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_CONSTMETHODKLASS_HPP
  26 #define SHARE_VM_OOPS_CONSTMETHODKLASS_HPP
  27 
  28 #include "oops/klass.hpp"
  29 #include "oops/oop.hpp"
  30 #include "runtime/orderAccess.hpp"
  31 
  32 // A constMethodKlass is the klass of a constMethodOop
  33 
  34 class constMethodKlass : public Klass {
  35   friend class VMStructs;
  36 private:
  37   juint    _alloc_size;        // allocation profiling support
  38 public:
  39   // Testing
  40   bool oop_is_constMethod() const { return true; }
  41   virtual bool oop_is_parsable(oop obj) const;
  42   virtual bool oop_is_conc_safe(oop obj) const;
  43 
  44 
  45   // Allocation
  46   DEFINE_ALLOCATE_PERMANENT(constMethodKlass);
  47   constMethodOop allocate(int byte_code_size, int compressed_line_number_size,
  48                           int localvariable_table_length,
  49                           int checked_exceptions_length,
  50                           bool is_conc_safe,
  51                           TRAPS);
  52   static klassOop create_klass(TRAPS);
  53 
  54   // Sizing
  55   int oop_size(oop obj) const;
  56   int klass_oop_size() const     { return object_size(); }
  57 
  58   // Casting from klassOop
  59   static constMethodKlass* cast(klassOop k) {
  60     assert(k->klass_part()->oop_is_constMethod(), "cast to constMethodKlass");
  61     return (constMethodKlass*) k->klass_part();
  62   }
  63 
  64   // Sizing
  65   static int header_size() {
  66     return oopDesc::header_size() + sizeof(constMethodKlass)/HeapWordSize;
  67   }
  68   int object_size() const {
  69     return align_object_size(header_size());
  70   }
  71 
  72   // Garbage collection
  73   void oop_follow_contents(oop obj);
  74   int  oop_adjust_pointers(oop obj);
  75 
  76   // Parallel Scavenge and Parallel Old
  77   PARALLEL_GC_DECLS
  78 
  79   // Allocation profiling support
  80   juint alloc_size() const              { return _alloc_size; }
  81   void set_alloc_size(juint n)          { _alloc_size = n; }
  82 
  83   // Iterators
  84   int oop_oop_iterate(oop obj, OopClosure* blk);
  85   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
  86 
  87   // Printing
  88   void oop_print_value_on(oop obj, outputStream* st);
  89   void oop_print_on      (oop obj, outputStream* st);
  90 
  91   // Verify operations
  92   const char* internal_name() const;
  93   void oop_verify_on(oop obj, outputStream* st);
  94   bool oop_partially_loaded(oop obj) const;
  95   void oop_set_partially_loaded(oop obj);
  96 };
  97 
  98 #endif // SHARE_VM_OOPS_CONSTMETHODKLASS_HPP