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   ValueKlass*    _element_klass;             // The klass of the elements of this array type
  40 
  41   // Constructor
  42   ValueArrayKlass(Klass* element_klass, Symbol* name);
  43   void set_element_klass(ValueKlass* k);
  44 
  45   static ValueArrayKlass* allocate_klass(Klass* element_klass, Symbol* name, TRAPS);
  46 protected:
  47   // Returns the ArrayKlass for n'th dimension.
  48   Klass* array_klass_impl(bool or_null, int n, TRAPS);
  49 
  50   // Returns the array class with this class as element type.
  51   Klass* array_klass_impl(bool or_null, TRAPS);
  52 
  53  public:
  54 
  55   ValueArrayKlass() {}
  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   // Instance variables
  69   ValueKlass* element_klass() const     { return _element_klass; }
  70   ValueKlass** element_klass_addr()     { return &_element_klass; }
  71 
  72   ModuleEntry* module() const;
  73   PackageEntry* package() const;
  74 
  75   int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); }
  76 
  77   bool is_valueArray_klass_slow() const { return true; }
  78 
  79   bool contains_oops() { return element_klass()->contains_oops(); }
  80   bool is_atomic() { return element_klass()->is_atomic(); }





  81 
  82   oop protection_domain() const;
  83 
  84   static jint array_layout_helper(ValueKlass* vklass); // layout helper for values
  85 
  86   // sizing
  87   static int header_size()  { return sizeof(ValueArrayKlass)/HeapWordSize; }
  88   int size() const          { return ArrayKlass::static_size(header_size()); }
  89 
  90   jint max_elements() const;
  91 
  92   int oop_size(oop obj) const;
  93 
  94   // Oop Allocation
  95   oop allocate(int length, bool do_zero, TRAPS);
  96   oop multi_allocate(int rank, jint* sizes, TRAPS);
  97 
  98   // Naming
  99   const char* internal_name() const { return external_name(); }
 100 
 101   // Copying
 102   void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
 103 
 104   // Compiler/Interpreter offset
 105   static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ValueArrayKlass, _element_klass)); }
 106 
 107   // GC specific object visitors
 108   //
 109   // Mark Sweep
 110   int oop_ms_adjust_pointers(oop obj);
 111 
 112 #if INCLUDE_ALL_GCS
 113   // Parallel Scavenge
 114   void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);
 115   // Parallel Compact
 116   void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
 117   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
 118 #endif
 119 
 120   CMH("Oop iterators. Don't have embedded oops yet, so CMH...")
 121 
 122  private:
 123   template <bool nv, typename OopClosureType>
 124   inline void oop_oop_iterate(oop obj, OopClosureType* closure);
 125   template <bool nv, typename OopClosureType>
 126   inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
 127 
 128   template <bool nv, typename T, class OopClosureType>
 129   inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure);
 130 
 131   template <bool nv, class OopClosureType>
 132   inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr);
 133 
 134   template <bool nv, typename T, class OopClosureType>
 135   inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high);
 136 
 137  public:
 138   template <bool nv, class OopClosureType>
 139   inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure);
 140 
 141   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
 142   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
 143   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
 144   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
 145 
 146 #if INCLUDE_ALL_GCS
 147   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 148   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 149 #endif // INCLUDE_ALL_GCS
 150 
 151  public:
 152   // Printing
 153   void print_on(outputStream* st) const;
 154   void print_value_on(outputStream* st) const;
 155 
 156   void oop_print_value_on(oop obj, outputStream* st);
 157 #ifndef PRODUCT
 158   void oop_print_on(oop obj, outputStream* st);
 159 #endif
 160 
 161   // Verification
 162   void verify_on(outputStream* st);
 163   void oop_verify_on(oop obj, outputStream* st);
 164 };
 165 
 166 #endif
 167 
--- EOF ---