1 /* 2 * Copyright (c) 2005, 2012, 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 #ifndef SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP 26 #define SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP 27 28 #include "oops/constantPool.hpp" 29 #include "utilities/hashtable.hpp" 30 31 class ResolutionErrorEntry; 32 33 // ResolutionError objects are used to record errors encountered during 34 // constant pool resolution (JVMS 5.4.3). 35 36 class ResolutionErrorTable : public Hashtable<ConstantPool*, mtClass> { 37 38 public: 39 ResolutionErrorTable(int table_size); 40 41 ResolutionErrorEntry* new_entry(int hash, ConstantPool* pool, int cp_index, Symbol* error); 42 void free_entry(ResolutionErrorEntry *entry); 43 44 ResolutionErrorEntry* bucket(int i) { 45 return (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::bucket(i); 46 } 47 48 ResolutionErrorEntry** bucket_addr(int i) { 49 return (ResolutionErrorEntry**)Hashtable<ConstantPool*, mtClass>::bucket_addr(i); 50 } 51 52 void add_entry(int index, ResolutionErrorEntry* new_entry) { 53 Hashtable<ConstantPool*, mtClass>::add_entry(index, 54 (HashtableEntry<ConstantPool*, mtClass>*)new_entry); 55 } 56 57 void add_entry(int index, unsigned int hash, 58 constantPoolHandle pool, int which, Symbol* error); 59 60 61 // find error given the constant pool and constant pool index 62 ResolutionErrorEntry* find_entry(int index, unsigned int hash, 63 constantPoolHandle pool, int cp_index); 64 65 66 unsigned int compute_hash(constantPoolHandle pool, int cp_index) { 67 return (unsigned int) pool->identity_hash() + cp_index; 68 } 69 70 // purges unloaded entries from the table 71 void purge_resolution_errors(); 72 73 // RedefineClasses support - remove obsolete constant pool entry 74 void delete_entry(ConstantPool* c); 75 }; 76 77 78 class ResolutionErrorEntry : public HashtableEntry<ConstantPool*, mtClass> { 79 private: 80 int _cp_index; 81 Symbol* _error; 82 83 public: 84 ConstantPool* pool() const { return (ConstantPool*)literal(); } 85 ConstantPool** pool_addr() { return (ConstantPool**)literal_addr(); } 86 87 int cp_index() const { return _cp_index; } 88 void set_cp_index(int cp_index) { _cp_index = cp_index; } 89 90 Symbol* error() const { return _error; } 91 void set_error(Symbol* e); 92 93 ResolutionErrorEntry* next() const { 94 return (ResolutionErrorEntry*)HashtableEntry<ConstantPool*, mtClass>::next(); 95 } 96 97 ResolutionErrorEntry** next_addr() { 98 return (ResolutionErrorEntry**)HashtableEntry<ConstantPool*, mtClass>::next_addr(); 99 } 100 }; 101 102 #endif // SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP