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annotate src/share/vm/classfile/resolutionErrors.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
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1 /*
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2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP
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26 #define SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP
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27
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28 #include "oops/constantPool.hpp"
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29 #include "utilities/hashtable.hpp"
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30
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31 class ResolutionErrorEntry;
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33 // ResolutionError objects are used to record errors encountered during
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34 // constant pool resolution (JVMS 5.4.3).
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35
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36 class ResolutionErrorTable : public Hashtable<ConstantPool*, mtClass> {
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38 public:
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39 ResolutionErrorTable(int table_size);
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40
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41 ResolutionErrorEntry* new_entry(int hash, ConstantPool* pool, int cp_index, Symbol* error);
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42 void free_entry(ResolutionErrorEntry *entry);
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43
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44 ResolutionErrorEntry* bucket(int i) {
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45 return (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::bucket(i);
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46 }
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47
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48 ResolutionErrorEntry** bucket_addr(int i) {
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49 return (ResolutionErrorEntry**)Hashtable<ConstantPool*, mtClass>::bucket_addr(i);
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50 }
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51
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52 void add_entry(int index, ResolutionErrorEntry* new_entry) {
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53 Hashtable<ConstantPool*, mtClass>::add_entry(index,
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54 (HashtableEntry<ConstantPool*, mtClass>*)new_entry);
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55 }
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56
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57 void add_entry(int index, unsigned int hash,
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58 constantPoolHandle pool, int which, Symbol* error);
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59
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61 // find error given the constant pool and constant pool index
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62 ResolutionErrorEntry* find_entry(int index, unsigned int hash,
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63 constantPoolHandle pool, int cp_index);
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64
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66 unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
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67 return (unsigned int) pool->identity_hash() + cp_index;
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68 }
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69
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70 // purges unloaded entries from the table
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71 void purge_resolution_errors();
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72
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73 // RedefineClasses support - remove obsolete constant pool entry
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74 void delete_entry(ConstantPool* c);
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75 };
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77
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78 class ResolutionErrorEntry : public HashtableEntry<ConstantPool*, mtClass> {
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79 private:
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80 int _cp_index;
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81 Symbol* _error;
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82
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83 public:
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84 ConstantPool* pool() const { return (ConstantPool*)literal(); }
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85 ConstantPool** pool_addr() { return (ConstantPool**)literal_addr(); }
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86
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87 int cp_index() const { return _cp_index; }
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88 void set_cp_index(int cp_index) { _cp_index = cp_index; }
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89
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90 Symbol* error() const { return _error; }
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91 void set_error(Symbol* e);
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93 ResolutionErrorEntry* next() const {
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94 return (ResolutionErrorEntry*)HashtableEntry<ConstantPool*, mtClass>::next();
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95 }
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97 ResolutionErrorEntry** next_addr() {
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98 return (ResolutionErrorEntry**)HashtableEntry<ConstantPool*, mtClass>::next_addr();
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99 }
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100 };
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101
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102 #endif // SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP