1 /*
   2  * Copyright (c) 2014, 2016, 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_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
  26 #define SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "classfile/dictionary.hpp"
  30 
  31 class ClassFileStream;
  32 class SerializeClosure;
  33 
  34 class SystemDictionaryShared: public SystemDictionary {
  35 public:
  36   static void initialize(TRAPS) {}
  37   static instanceKlassHandle find_or_load_shared_class(Symbol* class_name,
  38                                                        Handle class_loader,
  39                                                        TRAPS) {
  40     return instanceKlassHandle();
  41   }
  42   static void roots_oops_do(OopClosure* blk) {}
  43   static void oops_do(OopClosure* f) {}
  44   static bool is_sharing_possible(ClassLoaderData* loader_data) {
  45     oop class_loader = loader_data->class_loader();
  46     return (class_loader == NULL);
  47   }
  48   static bool is_shared_class_visible_for_classloader(
  49                                       instanceKlassHandle ik,
  50                                       Handle class_loader,
  51                                       const char* pkg_string,
  52                                       Symbol* pkg_name,
  53                                       PackageEntry* pkg_entry,
  54                                       ModuleEntry* mod_entry,
  55                                       TRAPS) {
  56     return false;
  57   }
  58 
  59   static Klass* dump_time_resolve_super_or_fail(Symbol* child_name,
  60                                                 Symbol* class_name,
  61                                                 Handle class_loader,
  62                                                 Handle protection_domain,
  63                                                 bool is_superclass,
  64                                                 TRAPS) {
  65     return NULL;
  66   }
  67 
  68   static size_t dictionary_entry_size() {
  69     return sizeof(DictionaryEntry);
  70   }
  71 
  72   static void init_shared_dictionary_entry(Klass* k, DictionaryEntry* entry) {}
  73 
  74   static InstanceKlass* lookup_from_stream(Symbol* class_name,
  75                                            Handle class_loader,
  76                                            Handle protection_domain,
  77                                            const ClassFileStream* st,
  78                                            TRAPS) {
  79     return NULL;
  80   }
  81 
  82   static void serialize(SerializeClosure* soc) {}
  83 
  84   // The (non-application) CDS implementation supports only classes in the boot
  85   // class loader, which ensures that the verification constraints are the same
  86   // during archive creation time and runtime. Thus we can do the constraint checks
  87   // entirely during archive creation time.
  88   static bool add_verification_constraint(Klass* k, Symbol* name,
  89                   Symbol* from_name, bool from_field_is_protected,
  90                   bool from_is_array, bool from_is_object) {return false;}
  91   static void finalize_verification_constraints() {}
  92   static void check_verification_constraints(instanceKlassHandle klass,
  93                                               TRAPS) {}
  94 };
  95 
  96 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP