Mercurial > hg > graal-compiler

comparison src/share/vm/classfile/dictionary.hpp @ 0:a61af66fc99e jdk7-b24

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children e5b0439ef4ae
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 class DictionaryEntry;
26
27 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 // The data structure for the system dictionary (and the shared system
29 // dictionary).
30
31 class Dictionary : public TwoOopHashtable {
32 friend class VMStructs;
33 private:
34 // current iteration index.
35 static int _current_class_index;
36 // pointer to the current hash table entry.
37 static DictionaryEntry* _current_class_entry;
38
39 DictionaryEntry* get_entry(int index, unsigned int hash,
40 symbolHandle name, Handle loader);
41
42 DictionaryEntry* bucket(int i) {
43 return (DictionaryEntry*)Hashtable::bucket(i);
44 }
45
46 // The following method is not MT-safe and must be done under lock.
47 DictionaryEntry** bucket_addr(int i) {
48 return (DictionaryEntry**)Hashtable::bucket_addr(i);
49 }
50
51 void add_entry(int index, DictionaryEntry* new_entry) {
52 Hashtable::add_entry(index, (HashtableEntry*)new_entry);
53 }
54
55
56 public:
57 Dictionary(int table_size);
58 Dictionary(int table_size, HashtableBucket* t, int number_of_entries);
59
60 DictionaryEntry* new_entry(unsigned int hash, klassOop klass, oop loader);
61
62 DictionaryEntry* new_entry();
63
64 void free_entry(DictionaryEntry* entry);
65
66 void add_klass(symbolHandle class_name, Handle class_loader,KlassHandle obj);
67
68 klassOop find_class(int index, unsigned int hash,
69 symbolHandle name, Handle loader);
70
71 klassOop find_shared_class(int index, unsigned int hash, symbolHandle name);
72
73 // Compiler support
74 klassOop try_get_next_class();
75
76 // GC support
77
78 void oops_do(OopClosure* f);
79 void always_strong_classes_do(OopClosure* blk);
80 void classes_do(void f(klassOop));
81 void classes_do(void f(klassOop, TRAPS), TRAPS);
82 void classes_do(void f(klassOop, oop));
83 void classes_do(void f(klassOop, oop, TRAPS), TRAPS);
84
85 void methods_do(void f(methodOop));
86
87
88 // Classes loaded by the bootstrap loader are always strongly reachable.
89 // If we're not doing class unloading, all classes are strongly reachable.
90 static bool is_strongly_reachable(oop class_loader, oop klass) {
91 assert (klass != NULL, "should have non-null klass");
92 return (class_loader == NULL || !ClassUnloading);
93 }
94
95 // Unload (that is, break root links to) all unmarked classes and
96 // loaders. Returns "true" iff something was unloaded.
97 bool do_unloading(BoolObjectClosure* is_alive);
98
99 // Protection domains
100 klassOop find(int index, unsigned int hash, symbolHandle name,
101 Handle loader, Handle protection_domain, TRAPS);
102 bool is_valid_protection_domain(int index, unsigned int hash,
103 symbolHandle name, Handle class_loader,
104 Handle protection_domain);
105 void add_protection_domain(int index, unsigned int hash,
106 instanceKlassHandle klass, Handle loader,
107 Handle protection_domain, TRAPS);
108
109 // Sharing support
110 void dump(SerializeOopClosure* soc);
111 void restore(SerializeOopClosure* soc);
112 void reorder_dictionary();
113
114
115 #ifndef PRODUCT
116 void print();
117 #endif
118 void verify();
119 };
120
121 // The following classes can be in dictionary.cpp, but we need these
122 // to be in header file so that SA's vmStructs can access.
123
124 class ProtectionDomainEntry :public CHeapObj {
125 friend class VMStructs;
126 public:
127 ProtectionDomainEntry* _next;
128 oop _protection_domain;
129
130 ProtectionDomainEntry(oop protection_domain, ProtectionDomainEntry* next) {
131 _protection_domain = protection_domain;
132 _next = next;
133 }
134
135 ProtectionDomainEntry* next() { return _next; }
136 oop protection_domain() { return _protection_domain; }
137 };
138
139 // An entry in the system dictionary, this describes a class as
140 // { klassOop, loader, protection_domain }.
141
142 class DictionaryEntry : public HashtableEntry {
143 friend class VMStructs;
144 private:
145 // Contains the set of approved protection domains that can access
146 // this system dictionary entry.
147 ProtectionDomainEntry* _pd_set;
148 oop _loader;
149
150
151 public:
152 // Tells whether a protection is in the approved set.
153 bool contains_protection_domain(oop protection_domain) const;
154 // Adds a protection domain to the approved set.
155 void add_protection_domain(oop protection_domain);
156
157 klassOop klass() const { return (klassOop)literal(); }
158 klassOop* klass_addr() { return (klassOop*)literal_addr(); }
159
160 DictionaryEntry* next() const {
161 return (DictionaryEntry*)HashtableEntry::next();
162 }
163
164 DictionaryEntry** next_addr() {
165 return (DictionaryEntry**)HashtableEntry::next_addr();
166 }
167
168 oop loader() const { return _loader; }
169 void set_loader(oop loader) { _loader = loader; }
170 oop* loader_addr() { return &_loader; }
171
172 ProtectionDomainEntry* pd_set() const { return _pd_set; }
173 void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; }
174
175 bool has_protection_domain() { return _pd_set != NULL; }
176
177 // Tells whether the initiating class' protection can access the this _klass
178 bool is_valid_protection_domain(Handle protection_domain) {
179 if (!ProtectionDomainVerification) return true;
180 if (!SystemDictionary::has_checkPackageAccess()) return true;
181
182 return protection_domain() == NULL
183 ? true
184 : contains_protection_domain(protection_domain());
185 }
186
187
188 void protection_domain_set_oops_do(OopClosure* f) {
189 for (ProtectionDomainEntry* current = _pd_set;
190 current != NULL;
191 current = current->_next) {
192 f->do_oop(&(current->_protection_domain));
193 }
194 }
195
196 void verify_protection_domain_set() {
197 for (ProtectionDomainEntry* current = _pd_set;
198 current != NULL;
199 current = current->_next) {
200 current->_protection_domain->verify();
201 }
202 }
203
204 bool equals(symbolOop class_name, oop class_loader) const {
205 klassOop klass = (klassOop)literal();
206 return (instanceKlass::cast(klass)->name() == class_name &&
207 _loader == class_loader);
208 }
209
210 void print() {
211 int count = 0;
212 for (ProtectionDomainEntry* current = _pd_set;
213 current != NULL;
214 current = current->_next) {
215 count++;
216 }
217 tty->print_cr("pd set = #%d", count);
218 }
219 };