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src/hotspot/share/oops/instanceClassLoaderKlass.hpp

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   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_INSTANCECLASSLOADERKLASS_HPP
  26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
  27 
  28 #include "gc/shared/specialized_oop_closures.hpp"
  29 #include "oops/instanceKlass.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 class ClassFileParser;
  33 
  34 // An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does
  35 // not add any field.  It is added to walk the dependencies for the class loader
  36 // key that this class loader points to.  This is how the loader_data graph is
  37 // walked and dependant class loaders are kept alive.  I thought we walked
  38 // the list later?
  39 
  40 class InstanceClassLoaderKlass: public InstanceKlass {
  41   friend class VMStructs;
  42   friend class InstanceKlass;
  43  private:
  44   InstanceClassLoaderKlass(const ClassFileParser& parser) : InstanceKlass(parser, InstanceKlass::_misc_kind_class_loader) {}



  45 
  46 public:
  47   InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
  48 
  49   // GC specific object visitors
  50   //
  51 #if INCLUDE_PARALLELGC
  52   // Parallel Scavenge
  53   void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);
  54   // Parallel Compact
  55   void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
  56   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
  57 #endif
  58 
  59   // Oop fields (and metadata) iterators
  60   //  [nv = true]  Use non-virtual calls to do_oop_nv.
  61   //  [nv = false] Use virtual calls to do_oop.
  62   //
  63   // The InstanceClassLoaderKlass iterators also visit the CLD pointer (or mirror of anonymous klasses.)
  64 
  65  private:
  66   // Forward iteration
  67   // Iterate over the oop fields and metadata.
  68   template <bool nv, class OopClosureType>
  69   inline void oop_oop_iterate(oop obj, OopClosureType* closure);
  70 
  71 #if INCLUDE_OOP_OOP_ITERATE_BACKWARDS
  72   // Reverse iteration
  73   // Iterate over the oop fields and metadata.
  74   template <bool nv, class OopClosureType>
  75   inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
  76 #endif
  77 
  78   // Bounded range iteration
  79   // Iterate over the oop fields and metadata.
  80   template <bool nv, class OopClosureType>
  81   inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
  82 
  83  public:
  84 
  85   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
  86   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
  87 
  88 #if INCLUDE_OOP_OOP_ITERATE_BACKWARDS
  89   ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_BACKWARDS)
  90   ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_BACKWARDS)
  91 #endif
  92 
  93 };
  94 
  95 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP


   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_INSTANCECLASSLOADERKLASS_HPP
  26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
  27 

  28 #include "oops/instanceKlass.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 class ClassFileParser;
  32 
  33 // An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does
  34 // not add any field.  It is added to walk the dependencies for the class loader
  35 // key that this class loader points to.  This is how the loader_data graph is
  36 // walked and dependant class loaders are kept alive.  I thought we walked
  37 // the list later?
  38 
  39 class InstanceClassLoaderKlass: public InstanceKlass {
  40   friend class VMStructs;
  41   friend class InstanceKlass;
  42 public:
  43   static const int ID = InstanceClassLoaderKlassID;
  44 
  45 private:
  46   InstanceClassLoaderKlass(const ClassFileParser& parser) : InstanceKlass(parser, InstanceKlass::_misc_kind_class_loader, ID) {}
  47 
  48 public:
  49   InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
  50 
  51   // GC specific object visitors
  52   //
  53 #if INCLUDE_PARALLELGC
  54   // Parallel Scavenge
  55   void oop_ps_push_contents(  oop obj, PSPromotionManager* pm);
  56   // Parallel Compact
  57   void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
  58   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
  59 #endif
  60 
  61   // Oop fields (and metadata) iterators


  62   //
  63   // The InstanceClassLoaderKlass iterators also visit the CLD pointer (or mirror of anonymous klasses.)
  64 
  65  public:
  66   // Forward iteration
  67   // Iterate over the oop fields and metadata.
  68   template <typename T, class OopClosureType>
  69   inline void oop_oop_iterate(oop obj, OopClosureType* closure);
  70 

  71   // Reverse iteration
  72   // Iterate over the oop fields and metadata.
  73   template <typename T, class OopClosureType>
  74   inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);

  75 
  76   // Bounded range iteration
  77   // Iterate over the oop fields and metadata.
  78   template <typename T, class OopClosureType>
  79   inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);











  80 };
  81 
  82 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
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