hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
author iklam
Wed, 06 Apr 2016 21:53:44 -0700
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8150752: Share Class Data Reviewed-by: acorn, hseigel, mschoene
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/*
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 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
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#define SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
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#include "classfile/systemDictionary.hpp"
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#include "classfile/dictionary.hpp"
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class ClassFileStream;
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class SerializeClosure;
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class SystemDictionaryShared: public SystemDictionary {
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public:
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  static void initialize(TRAPS) {}
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  static instanceKlassHandle find_or_load_shared_class(Symbol* class_name,
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                                                       Handle class_loader,
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                                                       TRAPS) {
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    return instanceKlassHandle();
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  }
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  static void roots_oops_do(OopClosure* blk) {}
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  static void oops_do(OopClosure* f) {}
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  static bool is_sharing_possible(ClassLoaderData* loader_data) {
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    oop class_loader = loader_data->class_loader();
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    return (class_loader == NULL);
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  }
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  static bool is_shared_class_visible_for_classloader(
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                                      instanceKlassHandle ik,
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                                      Handle class_loader,
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                                      const char* pkg_string,
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                                      Symbol* pkg_name,
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                                      PackageEntry* pkg_entry,
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                                      ModuleEntry* mod_entry,
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                                      TRAPS) {
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    return false;
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  }
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  static Klass* dump_time_resolve_super_or_fail(Symbol* child_name,
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                                                Symbol* class_name,
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                                                Handle class_loader,
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                                                Handle protection_domain,
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                                                bool is_superclass,
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                                                TRAPS) {
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    return NULL;
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  }
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  static size_t dictionary_entry_size() {
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    return sizeof(DictionaryEntry);
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  }
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  static void init_shared_dictionary_entry(Klass* k, DictionaryEntry* entry) {}
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  static InstanceKlass* lookup_from_stream(Symbol* class_name,
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                                           Handle class_loader,
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                                           Handle protection_domain,
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                                           const ClassFileStream* st,
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                                           TRAPS) {
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    return NULL;
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  }
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  static void serialize(SerializeClosure* soc) {}
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  // The (non-application) CDS implementation supports only classes in the boot
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  // class loader, which ensures that the verification constraints are the same
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  // during archive creation time and runtime. Thus we can do the constraint checks
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  // entirely during archive creation time.
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  static bool add_verification_constraint(Klass* k, Symbol* name,
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                  Symbol* from_name, bool from_field_is_protected,
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                  bool from_is_array, bool from_is_object) {return false;}
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  static void finalize_verification_constraints() {}
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  static void check_verification_constraints(instanceKlassHandle klass,
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                                              TRAPS) {}
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};
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#endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP