Fri, 06 Jun 2008 13:43:36 -0400
Merge
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | class DictionaryEntry; |
duke@435 | 26 | |
duke@435 | 27 | //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
duke@435 | 28 | // The data structure for the system dictionary (and the shared system |
duke@435 | 29 | // dictionary). |
duke@435 | 30 | |
duke@435 | 31 | class Dictionary : public TwoOopHashtable { |
duke@435 | 32 | friend class VMStructs; |
duke@435 | 33 | private: |
duke@435 | 34 | // current iteration index. |
duke@435 | 35 | static int _current_class_index; |
duke@435 | 36 | // pointer to the current hash table entry. |
duke@435 | 37 | static DictionaryEntry* _current_class_entry; |
duke@435 | 38 | |
duke@435 | 39 | DictionaryEntry* get_entry(int index, unsigned int hash, |
duke@435 | 40 | symbolHandle name, Handle loader); |
duke@435 | 41 | |
duke@435 | 42 | DictionaryEntry* bucket(int i) { |
duke@435 | 43 | return (DictionaryEntry*)Hashtable::bucket(i); |
duke@435 | 44 | } |
duke@435 | 45 | |
duke@435 | 46 | // The following method is not MT-safe and must be done under lock. |
duke@435 | 47 | DictionaryEntry** bucket_addr(int i) { |
duke@435 | 48 | return (DictionaryEntry**)Hashtable::bucket_addr(i); |
duke@435 | 49 | } |
duke@435 | 50 | |
duke@435 | 51 | void add_entry(int index, DictionaryEntry* new_entry) { |
duke@435 | 52 | Hashtable::add_entry(index, (HashtableEntry*)new_entry); |
duke@435 | 53 | } |
duke@435 | 54 | |
duke@435 | 55 | |
duke@435 | 56 | public: |
duke@435 | 57 | Dictionary(int table_size); |
duke@435 | 58 | Dictionary(int table_size, HashtableBucket* t, int number_of_entries); |
duke@435 | 59 | |
duke@435 | 60 | DictionaryEntry* new_entry(unsigned int hash, klassOop klass, oop loader); |
duke@435 | 61 | |
duke@435 | 62 | DictionaryEntry* new_entry(); |
duke@435 | 63 | |
duke@435 | 64 | void free_entry(DictionaryEntry* entry); |
duke@435 | 65 | |
duke@435 | 66 | void add_klass(symbolHandle class_name, Handle class_loader,KlassHandle obj); |
duke@435 | 67 | |
duke@435 | 68 | klassOop find_class(int index, unsigned int hash, |
duke@435 | 69 | symbolHandle name, Handle loader); |
duke@435 | 70 | |
duke@435 | 71 | klassOop find_shared_class(int index, unsigned int hash, symbolHandle name); |
duke@435 | 72 | |
duke@435 | 73 | // Compiler support |
duke@435 | 74 | klassOop try_get_next_class(); |
duke@435 | 75 | |
duke@435 | 76 | // GC support |
duke@435 | 77 | |
duke@435 | 78 | void oops_do(OopClosure* f); |
duke@435 | 79 | void always_strong_classes_do(OopClosure* blk); |
duke@435 | 80 | void classes_do(void f(klassOop)); |
duke@435 | 81 | void classes_do(void f(klassOop, TRAPS), TRAPS); |
duke@435 | 82 | void classes_do(void f(klassOop, oop)); |
duke@435 | 83 | void classes_do(void f(klassOop, oop, TRAPS), TRAPS); |
duke@435 | 84 | |
duke@435 | 85 | void methods_do(void f(methodOop)); |
duke@435 | 86 | |
duke@435 | 87 | |
duke@435 | 88 | // Classes loaded by the bootstrap loader are always strongly reachable. |
duke@435 | 89 | // If we're not doing class unloading, all classes are strongly reachable. |
duke@435 | 90 | static bool is_strongly_reachable(oop class_loader, oop klass) { |
duke@435 | 91 | assert (klass != NULL, "should have non-null klass"); |
duke@435 | 92 | return (class_loader == NULL || !ClassUnloading); |
duke@435 | 93 | } |
duke@435 | 94 | |
duke@435 | 95 | // Unload (that is, break root links to) all unmarked classes and |
duke@435 | 96 | // loaders. Returns "true" iff something was unloaded. |
duke@435 | 97 | bool do_unloading(BoolObjectClosure* is_alive); |
duke@435 | 98 | |
duke@435 | 99 | // Protection domains |
duke@435 | 100 | klassOop find(int index, unsigned int hash, symbolHandle name, |
duke@435 | 101 | Handle loader, Handle protection_domain, TRAPS); |
duke@435 | 102 | bool is_valid_protection_domain(int index, unsigned int hash, |
duke@435 | 103 | symbolHandle name, Handle class_loader, |
duke@435 | 104 | Handle protection_domain); |
duke@435 | 105 | void add_protection_domain(int index, unsigned int hash, |
duke@435 | 106 | instanceKlassHandle klass, Handle loader, |
duke@435 | 107 | Handle protection_domain, TRAPS); |
duke@435 | 108 | |
duke@435 | 109 | // Sharing support |
duke@435 | 110 | void dump(SerializeOopClosure* soc); |
duke@435 | 111 | void restore(SerializeOopClosure* soc); |
duke@435 | 112 | void reorder_dictionary(); |
duke@435 | 113 | |
duke@435 | 114 | |
duke@435 | 115 | #ifndef PRODUCT |
duke@435 | 116 | void print(); |
duke@435 | 117 | #endif |
duke@435 | 118 | void verify(); |
duke@435 | 119 | }; |
duke@435 | 120 | |
duke@435 | 121 | // The following classes can be in dictionary.cpp, but we need these |
duke@435 | 122 | // to be in header file so that SA's vmStructs can access. |
duke@435 | 123 | |
duke@435 | 124 | class ProtectionDomainEntry :public CHeapObj { |
duke@435 | 125 | friend class VMStructs; |
duke@435 | 126 | public: |
duke@435 | 127 | ProtectionDomainEntry* _next; |
duke@435 | 128 | oop _protection_domain; |
duke@435 | 129 | |
duke@435 | 130 | ProtectionDomainEntry(oop protection_domain, ProtectionDomainEntry* next) { |
duke@435 | 131 | _protection_domain = protection_domain; |
duke@435 | 132 | _next = next; |
duke@435 | 133 | } |
duke@435 | 134 | |
duke@435 | 135 | ProtectionDomainEntry* next() { return _next; } |
duke@435 | 136 | oop protection_domain() { return _protection_domain; } |
duke@435 | 137 | }; |
duke@435 | 138 | |
duke@435 | 139 | // An entry in the system dictionary, this describes a class as |
duke@435 | 140 | // { klassOop, loader, protection_domain }. |
duke@435 | 141 | |
duke@435 | 142 | class DictionaryEntry : public HashtableEntry { |
duke@435 | 143 | friend class VMStructs; |
duke@435 | 144 | private: |
duke@435 | 145 | // Contains the set of approved protection domains that can access |
duke@435 | 146 | // this system dictionary entry. |
duke@435 | 147 | ProtectionDomainEntry* _pd_set; |
duke@435 | 148 | oop _loader; |
duke@435 | 149 | |
duke@435 | 150 | |
duke@435 | 151 | public: |
duke@435 | 152 | // Tells whether a protection is in the approved set. |
duke@435 | 153 | bool contains_protection_domain(oop protection_domain) const; |
duke@435 | 154 | // Adds a protection domain to the approved set. |
duke@435 | 155 | void add_protection_domain(oop protection_domain); |
duke@435 | 156 | |
duke@435 | 157 | klassOop klass() const { return (klassOop)literal(); } |
duke@435 | 158 | klassOop* klass_addr() { return (klassOop*)literal_addr(); } |
duke@435 | 159 | |
duke@435 | 160 | DictionaryEntry* next() const { |
duke@435 | 161 | return (DictionaryEntry*)HashtableEntry::next(); |
duke@435 | 162 | } |
duke@435 | 163 | |
duke@435 | 164 | DictionaryEntry** next_addr() { |
duke@435 | 165 | return (DictionaryEntry**)HashtableEntry::next_addr(); |
duke@435 | 166 | } |
duke@435 | 167 | |
duke@435 | 168 | oop loader() const { return _loader; } |
duke@435 | 169 | void set_loader(oop loader) { _loader = loader; } |
duke@435 | 170 | oop* loader_addr() { return &_loader; } |
duke@435 | 171 | |
duke@435 | 172 | ProtectionDomainEntry* pd_set() const { return _pd_set; } |
duke@435 | 173 | void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; } |
duke@435 | 174 | |
duke@435 | 175 | bool has_protection_domain() { return _pd_set != NULL; } |
duke@435 | 176 | |
duke@435 | 177 | // Tells whether the initiating class' protection can access the this _klass |
duke@435 | 178 | bool is_valid_protection_domain(Handle protection_domain) { |
duke@435 | 179 | if (!ProtectionDomainVerification) return true; |
duke@435 | 180 | if (!SystemDictionary::has_checkPackageAccess()) return true; |
duke@435 | 181 | |
duke@435 | 182 | return protection_domain() == NULL |
duke@435 | 183 | ? true |
duke@435 | 184 | : contains_protection_domain(protection_domain()); |
duke@435 | 185 | } |
duke@435 | 186 | |
duke@435 | 187 | |
duke@435 | 188 | void protection_domain_set_oops_do(OopClosure* f) { |
duke@435 | 189 | for (ProtectionDomainEntry* current = _pd_set; |
duke@435 | 190 | current != NULL; |
duke@435 | 191 | current = current->_next) { |
duke@435 | 192 | f->do_oop(&(current->_protection_domain)); |
duke@435 | 193 | } |
duke@435 | 194 | } |
duke@435 | 195 | |
duke@435 | 196 | void verify_protection_domain_set() { |
duke@435 | 197 | for (ProtectionDomainEntry* current = _pd_set; |
duke@435 | 198 | current != NULL; |
duke@435 | 199 | current = current->_next) { |
duke@435 | 200 | current->_protection_domain->verify(); |
duke@435 | 201 | } |
duke@435 | 202 | } |
duke@435 | 203 | |
duke@435 | 204 | bool equals(symbolOop class_name, oop class_loader) const { |
duke@435 | 205 | klassOop klass = (klassOop)literal(); |
duke@435 | 206 | return (instanceKlass::cast(klass)->name() == class_name && |
duke@435 | 207 | _loader == class_loader); |
duke@435 | 208 | } |
duke@435 | 209 | |
duke@435 | 210 | void print() { |
duke@435 | 211 | int count = 0; |
duke@435 | 212 | for (ProtectionDomainEntry* current = _pd_set; |
duke@435 | 213 | current != NULL; |
duke@435 | 214 | current = current->_next) { |
duke@435 | 215 | count++; |
duke@435 | 216 | } |
duke@435 | 217 | tty->print_cr("pd set = #%d", count); |
duke@435 | 218 | } |
duke@435 | 219 | }; |