hotspot/src/share/vm/classfile/loaderConstraints.hpp
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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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/*
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 * Copyright (c) 2003, 2009, 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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class LoaderConstraintEntry;
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class LoaderConstraintTable : public Hashtable {
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  friend class VMStructs;
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private:
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  enum Constants {
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    _loader_constraint_size = 107,                     // number of entries in constraint table
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    _nof_buckets            = 1009                     // number of buckets in hash table
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  };
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  LoaderConstraintEntry** find_loader_constraint(symbolHandle name,
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                                                 Handle loader);
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  LoaderConstraintTable(int nof_buckets);
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  LoaderConstraintEntry* new_entry(unsigned int hash, symbolOop name,
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                                   klassOop klass, int num_loaders,
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                                   int max_loaders);
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  LoaderConstraintEntry* bucket(int i) {
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    return (LoaderConstraintEntry*)Hashtable::bucket(i);
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  }
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  LoaderConstraintEntry** bucket_addr(int i) {
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    return (LoaderConstraintEntry**)Hashtable::bucket_addr(i);
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  }
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  // GC support
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  void oops_do(OopClosure* f);
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  void always_strong_classes_do(OopClosure* blk);
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  // Check class loader constraints
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  bool add_entry(symbolHandle name, klassOop klass1, Handle loader1,
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                                    klassOop klass2, Handle loader2);
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  // Note:  The main entry point for this module is via SystemDictionary.
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  // SystemDictionary::check_signature_loaders(symbolHandle signature,
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  //                                           Handle loader1, Handle loader2,
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  //                                           bool is_method, TRAPS)
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  klassOop find_constrained_klass(symbolHandle name, Handle loader);
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  // Class loader constraints
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  void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree);
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  void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader,
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                                klassOop klass);
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  void merge_loader_constraints(LoaderConstraintEntry** pp1,
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                                LoaderConstraintEntry** pp2, klassOop klass);
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  bool check_or_update(instanceKlassHandle k, Handle loader,
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                              symbolHandle name);
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  void purge_loader_constraints(BoolObjectClosure* is_alive);
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  void verify(Dictionary* dictionary, PlaceholderTable* placeholders);
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#ifndef PRODUCT
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  void print();
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#endif
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};
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class LoaderConstraintEntry : public HashtableEntry {
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  friend class VMStructs;
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  symbolOop              _name;                   // class name
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  int                    _num_loaders;
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  int                    _max_loaders;
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  oop*                   _loaders;                // initiating loaders
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  klassOop klass() { return (klassOop)literal(); }
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  klassOop* klass_addr() { return (klassOop*)literal_addr(); }
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  void set_klass(klassOop k) { set_literal(k); }
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  LoaderConstraintEntry* next() {
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    return (LoaderConstraintEntry*)HashtableEntry::next();
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  }
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  LoaderConstraintEntry** next_addr() {
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    return (LoaderConstraintEntry**)HashtableEntry::next_addr();
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  }
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  void set_next(LoaderConstraintEntry* next) {
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    HashtableEntry::set_next(next);
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  }
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  symbolOop name() { return _name; }
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  symbolOop* name_addr() { return &_name; }
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  void set_name(symbolOop name) { _name = name; }
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  int num_loaders() { return _num_loaders; }
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  void set_num_loaders(int i) { _num_loaders = i; }
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  int max_loaders() { return _max_loaders; }
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  void set_max_loaders(int i) { _max_loaders = i; }
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  oop* loaders() { return _loaders; }
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  void set_loaders(oop* loaders) { _loaders = loaders; }
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  oop loader(int i) { return _loaders[i]; }
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  oop* loader_addr(int i) { return &_loaders[i]; }
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  void set_loader(int i, oop p) { _loaders[i] = p; }
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};