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