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1 /*
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2 * Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class ResolutionErrorEntry;
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26
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27 // ResolutionError objects are used to record errors encountered during
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28 // constant pool resolution (JVMS 5.4.3).
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29
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30 class ResolutionErrorTable : public Hashtable {
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31
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32 public:
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33 ResolutionErrorTable(int table_size);
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34
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35 ResolutionErrorEntry* new_entry(int hash, constantPoolOop pool, int cp_index, symbolOop error);
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36
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37 ResolutionErrorEntry* bucket(int i) {
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38 return (ResolutionErrorEntry*)Hashtable::bucket(i);
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39 }
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40
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41 ResolutionErrorEntry** bucket_addr(int i) {
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42 return (ResolutionErrorEntry**)Hashtable::bucket_addr(i);
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43 }
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44
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45 void add_entry(int index, ResolutionErrorEntry* new_entry) {
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46 Hashtable::add_entry(index, (HashtableEntry*)new_entry);
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47 }
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48
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49 void add_entry(int index, unsigned int hash,
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50 constantPoolHandle pool, int which, symbolHandle error);
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51
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52
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53 // find error given the constant pool and constant pool index
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54 ResolutionErrorEntry* find_entry(int index, unsigned int hash,
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55 constantPoolHandle pool, int cp_index);
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56
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57
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58 unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
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59 return (unsigned int) pool->identity_hash() + cp_index;
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60 }
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61
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62 // purges unloaded entries from the table
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63 void purge_resolution_errors(BoolObjectClosure* is_alive);
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64
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65 // this table keeps symbolOops alive
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66 void always_strong_classes_do(OopClosure* blk);
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67
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68 // GC support.
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69 void oops_do(OopClosure* f);
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70 };
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71
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72
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73 class ResolutionErrorEntry : public HashtableEntry {
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74 private:
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75 int _cp_index;
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76 symbolOop _error;
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77
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78 public:
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79 constantPoolOop pool() const { return (constantPoolOop)literal(); }
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80 constantPoolOop* pool_addr() { return (constantPoolOop*)literal_addr(); }
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81
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82 int cp_index() const { return _cp_index; }
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83 void set_cp_index(int cp_index) { _cp_index = cp_index; }
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84
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85 symbolOop error() const { return _error; }
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86 void set_error(symbolOop e) { _error = e; }
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87 symbolOop* error_addr() { return &_error; }
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88
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89 ResolutionErrorEntry* next() const {
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90 return (ResolutionErrorEntry*)HashtableEntry::next();
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91 }
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92
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93 ResolutionErrorEntry** next_addr() {
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94 return (ResolutionErrorEntry**)HashtableEntry::next_addr();
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95 }
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96
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97 // GC support
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98 void oops_do(OopClosure* blk);
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99 };
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