1 /*
   2  * Copyright (c) 2017, 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_VALUEARRAYKLASS_HPP
  26 #define SHARE_VM_OOPS_VALUEARRAYKLASS_HPP
  27 
  28 #include "classfile/classLoaderData.hpp"
  29 #include "oops/arrayKlass.hpp"
  30 #include "oops/valueKlass.hpp"
  31 #include "utilities/macros.hpp"
  32 
  33 /**
  34  * Array of values, gives a layout of typeArrayOop, but needs oops iterators
  35  */
  36 class ValueArrayKlass : public ArrayKlass {
  37   friend class VMStructs;
  38  private:


  39   // Constructor
  40   ValueArrayKlass(Klass* element_klass, Symbol* name);

  41 
  42   static ValueArrayKlass* allocate_klass(Klass* element_klass, Symbol* name, TRAPS);
  43 protected:
  44   // Returns the ArrayKlass for n'th dimension.
  45   Klass* array_klass_impl(bool or_null, int n, TRAPS);
  46 
  47   // Returns the array class with this class as element type.
  48   Klass* array_klass_impl(bool or_null, TRAPS);
  49 
  50  public:
  51 
  52   ValueArrayKlass() {}
  53 
  54   virtual ValueKlass* element_klass() const;
  55   virtual void set_element_klass(Klass* k);
  56 
  57   // Casting from Klass*
  58   static ValueArrayKlass* cast(Klass* k) {
  59     assert(k->is_valueArray_klass(), "cast to ValueArrayKlass");
  60     return (ValueArrayKlass*) k;
  61   }
  62 
  63   // klass allocation
  64   static ValueArrayKlass* allocate_klass(Klass* element_klass, TRAPS);
  65 
  66   void initialize(TRAPS);
  67 




  68   ModuleEntry* module() const;
  69   PackageEntry* package() const;
  70 
  71   int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
  72 
  73   bool is_valueArray_klass_slow() const { return true; }
  74 
  75   bool contains_oops() {
  76     return element_klass()->contains_oops();
  77   }
  78 
  79   bool is_atomic() {
  80     return element_klass()->is_atomic();
  81   }
  82 
  83   oop protection_domain() const;
  84 
  85   static jint array_layout_helper(ValueKlass* vklass); // layout helper for values
  86 
  87   // sizing
  88   static int header_size()  { return sizeof(ValueArrayKlass)/HeapWordSize; }
  89   int size() const          { return ArrayKlass::static_size(header_size()); }
  90 
  91   jint max_elements() const;
  92 
  93   int oop_size(oop obj) const;
  94 
  95   // Oop Allocation
  96   oop allocate(int length, bool do_zero, TRAPS);
  97   oop multi_allocate(int rank, jint* sizes, TRAPS);
  98 
  99   // Naming
 100   const char* internal_name() const { return external_name(); }
 101 
 102   // Copying
 103   void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);



 104 
 105   // GC specific object visitors
 106   //
 107   // Mark Sweep
 108   int oop_ms_adjust_pointers(oop obj);
 109 
 110 #if INCLUDE_ALL_GCS
 111   // Parallel Scavenge
 112   void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);
 113   // Parallel Compact
 114   void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
 115   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
 116 #endif
 117 
 118   CMH("Oop iterators. Don't have embedded oops yet, so CMH...")
 119 
 120  private:
 121   template <bool nv, typename OopClosureType>
 122   inline void oop_oop_iterate(oop obj, OopClosureType* closure);
 123   template <bool nv, typename OopClosureType>
 124   inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
 125 
 126   template <bool nv, typename T, class OopClosureType>
 127   inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure);
 128 
 129   template <bool nv, class OopClosureType>
 130   inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr);
 131 
 132   template <bool nv, typename T, class OopClosureType>
 133   inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high);
 134 
 135  public:
 136   template <bool nv, class OopClosureType>
 137   inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure);
 138 
 139   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
 140   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
 141   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
 142   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
 143 
 144 #if INCLUDE_ALL_GCS
 145   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 146   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 147 #endif // INCLUDE_ALL_GCS
 148 
 149  public:
 150   // Printing
 151   void print_on(outputStream* st) const;
 152   void print_value_on(outputStream* st) const;
 153 
 154   void oop_print_value_on(oop obj, outputStream* st);
 155 #ifndef PRODUCT
 156   void oop_print_on(oop obj, outputStream* st);
 157 #endif
 158 
 159   // Verification
 160   void verify_on(outputStream* st);
 161   void oop_verify_on(oop obj, outputStream* st);
 162 };
 163 
 164 #endif
 165 
--- EOF ---