rev 12851 : 8138737: Remove oop_ms_adjust_pointers and use oop_iterate instead
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   1 /*
   2  * Copyright (c) 1997, 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
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  24 
  25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  27 
  28 #include "classfile/classLoaderData.hpp"
  29 #include "oops/arrayKlass.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 // ObjArrayKlass is the klass for objArrays
  33 
  34 class ObjArrayKlass : public ArrayKlass {
  35   friend class VMStructs;
  36   friend class JVMCIVMStructs;
  37  private:
  38   Klass* _element_klass;            // The klass of the elements of this array type
  39   Klass* _bottom_klass;             // The one-dimensional type (InstanceKlass or TypeArrayKlass)
  40 
  41   // Constructor
  42   ObjArrayKlass(int n, Klass* element_klass, Symbol* name);
  43   static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS);
  44  public:
  45   // For dummy objects
  46   ObjArrayKlass() {}
  47 
  48   // Instance variables
  49   Klass* element_klass() const      { return _element_klass; }
  50   void set_element_klass(Klass* k)  { _element_klass = k; }
  51   Klass** element_klass_addr()      { return &_element_klass; }
  52 
  53   Klass* bottom_klass() const       { return _bottom_klass; }
  54   void set_bottom_klass(Klass* k)   { _bottom_klass = k; }
  55   Klass** bottom_klass_addr()       { return &_bottom_klass; }
  56 
  57   ModuleEntry* module() const;
  58   PackageEntry* package() const;
  59 
  60   // Compiler/Interpreter offset
  61   static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }
  62 
  63   // Dispatched operation
  64   bool can_be_primary_super_slow() const;
  65   GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
  66   bool compute_is_subtype_of(Klass* k);
  67   DEBUG_ONLY(bool is_objArray_klass_slow()  const  { return true; })
  68   int oop_size(oop obj) const;
  69 
  70   // Allocation
  71   static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
  72                                           int n, Klass* element_klass, TRAPS);
  73 
  74   objArrayOop allocate(int length, TRAPS);
  75   oop multi_allocate(int rank, jint* sizes, TRAPS);
  76 
  77   // Copying
  78   void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
  79 
  80   // Compute protection domain
  81   oop protection_domain() const { return bottom_klass()->protection_domain(); }
  82 
  83  private:
  84   // Either oop or narrowOop depending on UseCompressedOops.
  85   // must be called from within ObjArrayKlass.cpp
  86   template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
  87                                   T* dst, int length, TRAPS);
  88  protected:
  89   // Returns the ObjArrayKlass for n'th dimension.
  90   virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
  91 
  92   // Returns the array class with this class as element type.
  93   virtual Klass* array_klass_impl(bool or_null, TRAPS);
  94 
  95  public:
  96 
  97   static ObjArrayKlass* cast(Klass* k) {
  98     return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k)));
  99   }
 100 
 101   static const ObjArrayKlass* cast(const Klass* k) {
 102     assert(k->is_objArray_klass(), "cast to ObjArrayKlass");
 103     return static_cast<const ObjArrayKlass*>(k);
 104   }
 105 
 106   // Sizing
 107   static int header_size()                { return sizeof(ObjArrayKlass)/wordSize; }
 108   int size() const                        { return ArrayKlass::static_size(header_size()); }
 109 
 110   // Initialization (virtual from Klass)
 111   void initialize(TRAPS);
 112 
 113   // GC specific object visitors
 114   //


 115 #if INCLUDE_ALL_GCS
 116   // Parallel Scavenge
 117   void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);
 118   // Parallel Compact
 119   void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
 120   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
 121 #endif
 122 
 123   // Oop fields (and metadata) iterators
 124   //  [nv = true]  Use non-virtual calls to do_oop_nv.
 125   //  [nv = false] Use virtual calls to do_oop.
 126   //
 127   // The ObjArrayKlass iterators also visits the Object's klass.
 128 
 129  private:
 130 
 131   // Iterate over oop elements and metadata.
 132   template <bool nv, typename OopClosureType>
 133   inline void oop_oop_iterate(oop obj, OopClosureType* closure);
 134 
 135   // Iterate over oop elements within mr, and metadata.
 136   template <bool nv, typename OopClosureType>
 137   inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
 138 
 139   // Iterate over oop elements with indices within [start, end), and metadata.
 140   template <bool nv, class OopClosureType>
 141   inline void oop_oop_iterate_range(oop obj, OopClosureType* closure, int start, int end);
 142 
 143   // Iterate over oop elements within [start, end), and metadata.
 144   // Specialized for [T = oop] or [T = narrowOop].
 145   template <bool nv, typename T, class OopClosureType>
 146   inline void oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end);
 147 
 148  public:
 149   // Iterate over all oop elements.
 150   template <bool nv, class OopClosureType>
 151   inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure);
 152 
 153  private:
 154   // Iterate over all oop elements.
 155   // Specialized for [T = oop] or [T = narrowOop].
 156   template <bool nv, typename T, class OopClosureType>
 157   inline void oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure);
 158 
 159   // Iterate over all oop elements with indices within mr.
 160   template <bool nv, class OopClosureType>
 161   inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr);
 162 
 163   // Iterate over oop elements within [low, high)..
 164   // Specialized for [T = oop] or [T = narrowOop].
 165   template <bool nv, typename T, class OopClosureType>
 166   inline void oop_oop_iterate_elements_specialized_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high);
 167 
 168 
 169  public:
 170 
 171   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
 172   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
 173   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE)
 174   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE)
 175 
 176 #if INCLUDE_ALL_GCS
 177   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 178   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS)
 179 #endif // INCLUDE_ALL_GCS
 180 
 181   // JVM support
 182   jint compute_modifier_flags(TRAPS) const;
 183 
 184  public:
 185   // Printing
 186   void print_on(outputStream* st) const;
 187   void print_value_on(outputStream* st) const;
 188 
 189   void oop_print_value_on(oop obj, outputStream* st);
 190 #ifndef PRODUCT
 191   void oop_print_on      (oop obj, outputStream* st);
 192 #endif //PRODUCT
 193 
 194   const char* internal_name() const;
 195 
 196   // Verification
 197   void verify_on(outputStream* st);
 198 
 199   void oop_verify_on(oop obj, outputStream* st);
 200 };
 201 
 202 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP
--- EOF ---