Mercurial > hg > truffle
annotate src/share/vm/classfile/dictionary.cpp @ 9875:2c55e8c4a591
make ReadNode and WriteNode virtualizable
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Wed, 05 Jun 2013 11:45:13 +0200 |
parents | 1f9994892f89 |
children | d587a5c30bd8 |
rev | line source |
---|---|
0 | 1 /* |
4864
b2cd0ee8f778
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
2426
diff
changeset
|
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1513
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1513
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1513
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/dictionary.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "oops/oop.inline.hpp" | |
29 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
30 #include "services/classLoadingService.hpp" | |
31 #include "utilities/hashtable.inline.hpp" | |
0 | 32 |
33 | |
34 DictionaryEntry* Dictionary::_current_class_entry = NULL; | |
35 int Dictionary::_current_class_index = 0; | |
36 | |
37 | |
38 Dictionary::Dictionary(int table_size) | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
39 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry)) { |
0 | 40 _current_class_index = 0; |
41 _current_class_entry = NULL; | |
42 }; | |
43 | |
44 | |
45 | |
6197 | 46 Dictionary::Dictionary(int table_size, HashtableBucket<mtClass>* t, |
0 | 47 int number_of_entries) |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
48 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry), t, number_of_entries) { |
0 | 49 _current_class_index = 0; |
50 _current_class_entry = NULL; | |
51 }; | |
52 | |
53 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
54 DictionaryEntry* Dictionary::new_entry(unsigned int hash, Klass* klass, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
55 ClassLoaderData* loader_data) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
56 DictionaryEntry* entry = (DictionaryEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
57 entry->set_loader_data(loader_data); |
0 | 58 entry->set_pd_set(NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
59 assert(klass->oop_is_instance(), "Must be"); |
0 | 60 return entry; |
61 } | |
62 | |
63 | |
64 void Dictionary::free_entry(DictionaryEntry* entry) { | |
65 // avoid recursion when deleting linked list | |
66 while (entry->pd_set() != NULL) { | |
67 ProtectionDomainEntry* to_delete = entry->pd_set(); | |
68 entry->set_pd_set(to_delete->next()); | |
69 delete to_delete; | |
70 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
71 Hashtable<Klass*, mtClass>::free_entry(entry); |
0 | 72 } |
73 | |
74 | |
75 bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { | |
76 #ifdef ASSERT | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
77 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 78 // Ensure this doesn't show up in the pd_set (invariant) |
79 bool in_pd_set = false; | |
80 for (ProtectionDomainEntry* current = _pd_set; | |
81 current != NULL; | |
82 current = current->next()) { | |
83 if (current->protection_domain() == protection_domain) { | |
84 in_pd_set = true; | |
85 break; | |
86 } | |
87 } | |
88 if (in_pd_set) { | |
89 assert(false, "A klass's protection domain should not show up " | |
90 "in its sys. dict. PD set"); | |
91 } | |
92 } | |
93 #endif /* ASSERT */ | |
94 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
95 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 96 // Succeeds trivially |
97 return true; | |
98 } | |
99 | |
100 for (ProtectionDomainEntry* current = _pd_set; | |
101 current != NULL; | |
102 current = current->next()) { | |
103 if (current->protection_domain() == protection_domain) return true; | |
104 } | |
105 return false; | |
106 } | |
107 | |
108 | |
109 void DictionaryEntry::add_protection_domain(oop protection_domain) { | |
110 assert_locked_or_safepoint(SystemDictionary_lock); | |
111 if (!contains_protection_domain(protection_domain)) { | |
112 ProtectionDomainEntry* new_head = | |
113 new ProtectionDomainEntry(protection_domain, _pd_set); | |
114 // Warning: Preserve store ordering. The SystemDictionary is read | |
115 // without locks. The new ProtectionDomainEntry must be | |
116 // complete before other threads can be allowed to see it | |
117 // via a store to _pd_set. | |
118 OrderAccess::release_store_ptr(&_pd_set, new_head); | |
119 } | |
120 if (TraceProtectionDomainVerification && WizardMode) { | |
121 print(); | |
122 } | |
123 } | |
124 | |
125 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
126 bool Dictionary::do_unloading() { |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
710
diff
changeset
|
127 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 128 bool class_was_unloaded = false; |
129 int index = 0; // Defined here for portability! Do not move | |
130 | |
131 // Remove unloadable entries and classes from system dictionary | |
132 // The placeholder array has been handled in always_strong_oops_do. | |
133 DictionaryEntry* probe = NULL; | |
134 for (index = 0; index < table_size(); index++) { | |
135 for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { | |
136 probe = *p; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
137 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
138 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 139 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
140 InstanceKlass* ik = InstanceKlass::cast(e); |
0 | 141 |
142 // Non-unloadable classes were handled in always_strong_oops_do | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
143 if (!is_strongly_reachable(loader_data, e)) { |
0 | 144 // Entry was not visited in phase1 (negated test from phase1) |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
145 assert(!loader_data->is_the_null_class_loader_data(), "unloading entry with null class loader"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
146 ClassLoaderData* k_def_class_loader_data = ik->class_loader_data(); |
0 | 147 |
148 // Do we need to delete this system dictionary entry? | |
149 bool purge_entry = false; | |
150 | |
151 // Do we need to delete this system dictionary entry? | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
152 if (loader_data->is_unloading()) { |
0 | 153 // If the loader is not live this entry should always be |
154 // removed (will never be looked up again). Note that this is | |
155 // not the same as unloading the referred class. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
156 if (k_def_class_loader_data == loader_data) { |
0 | 157 // This is the defining entry, so the referred class is about |
158 // to be unloaded. | |
159 // Notify the debugger and clean up the class. | |
160 class_was_unloaded = true; | |
161 // notify the debugger | |
162 if (JvmtiExport::should_post_class_unload()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
163 JvmtiExport::post_class_unload(ik); |
0 | 164 } |
165 | |
166 // notify ClassLoadingService of class unload | |
167 ClassLoadingService::notify_class_unloaded(ik); | |
168 | |
169 // Clean up C heap | |
170 ik->release_C_heap_structures(); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
171 ik->constants()->release_C_heap_structures(); |
0 | 172 } |
173 // Also remove this system dictionary entry. | |
174 purge_entry = true; | |
175 | |
176 } else { | |
177 // The loader in this entry is alive. If the klass is dead, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
178 // (determined by checking the defining class loader) |
0 | 179 // the loader must be an initiating loader (rather than the |
180 // defining loader). Remove this entry. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
181 if (k_def_class_loader_data->is_unloading()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
182 // If we get here, the class_loader_data must not be the defining |
0 | 183 // loader, it must be an initiating one. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
184 assert(k_def_class_loader_data != loader_data, |
0 | 185 "cannot have live defining loader and unreachable klass"); |
186 // Loader is live, but class and its defining loader are dead. | |
187 // Remove the entry. The class is going away. | |
188 purge_entry = true; | |
189 } | |
190 } | |
191 | |
192 if (purge_entry) { | |
193 *p = probe->next(); | |
194 if (probe == _current_class_entry) { | |
195 _current_class_entry = NULL; | |
196 } | |
197 free_entry(probe); | |
198 continue; | |
199 } | |
200 } | |
201 p = probe->next_addr(); | |
202 } | |
203 } | |
204 return class_was_unloaded; | |
205 } | |
206 | |
207 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
208 void Dictionary::always_strong_oops_do(OopClosure* blk) { |
0 | 209 // Follow all system classes and temporary placeholders in dictionary |
210 for (int index = 0; index < table_size(); index++) { | |
211 for (DictionaryEntry *probe = bucket(index); | |
212 probe != NULL; | |
213 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
214 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
215 ClassLoaderData* loader_data = probe->loader_data(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
216 if (is_strongly_reachable(loader_data, e)) { |
0 | 217 probe->protection_domain_set_oops_do(blk); |
218 } | |
219 } | |
220 } | |
221 } | |
222 | |
223 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
224 void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
225 // Follow all system classes and temporary placeholders in dictionary |
0 | 226 for (int index = 0; index < table_size(); index++) { |
227 for (DictionaryEntry* probe = bucket(index); | |
228 probe != NULL; | |
229 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
230 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
231 ClassLoaderData* loader_data = probe->loader_data(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
232 if (is_strongly_reachable(loader_data, e)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
233 closure->do_klass(e); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
234 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
235 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
236 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
237 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
238 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
239 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
240 // Just the classes from defining class loaders |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
241 void Dictionary::classes_do(void f(Klass*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
242 for (int index = 0; index < table_size(); index++) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
243 for (DictionaryEntry* probe = bucket(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
244 probe != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
245 probe = probe->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
246 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
247 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 248 f(k); |
249 } | |
250 } | |
251 } | |
252 } | |
253 | |
254 // Added for initialize_itable_for_klass to handle exceptions | |
255 // Just the classes from defining class loaders | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
256 void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
0 | 257 for (int index = 0; index < table_size(); index++) { |
258 for (DictionaryEntry* probe = bucket(index); | |
259 probe != NULL; | |
260 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
261 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
262 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 263 f(k, CHECK); |
264 } | |
265 } | |
266 } | |
267 } | |
268 | |
269 | |
270 // All classes, and their class loaders | |
271 // (added for helpers that use HandleMarks and ResourceMarks) | |
272 // Don't iterate over placeholders | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
273 void Dictionary::classes_do(void f(Klass*, ClassLoaderData*, TRAPS), TRAPS) { |
0 | 274 for (int index = 0; index < table_size(); index++) { |
275 for (DictionaryEntry* probe = bucket(index); | |
276 probe != NULL; | |
277 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
278 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
279 f(k, probe->loader_data(), CHECK); |
0 | 280 } |
281 } | |
282 } | |
283 | |
284 | |
285 // All classes, and their class loaders | |
286 // Don't iterate over placeholders | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
287 void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
0 | 288 for (int index = 0; index < table_size(); index++) { |
289 for (DictionaryEntry* probe = bucket(index); | |
290 probe != NULL; | |
291 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
292 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
293 f(k, probe->loader_data()); |
0 | 294 } |
295 } | |
296 } | |
297 | |
298 | |
299 void Dictionary::oops_do(OopClosure* f) { | |
300 for (int index = 0; index < table_size(); index++) { | |
301 for (DictionaryEntry* probe = bucket(index); | |
302 probe != NULL; | |
303 probe = probe->next()) { | |
304 probe->protection_domain_set_oops_do(f); | |
305 } | |
306 } | |
307 } | |
308 | |
309 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
310 void Dictionary::methods_do(void f(Method*)) { |
0 | 311 for (int index = 0; index < table_size(); index++) { |
312 for (DictionaryEntry* probe = bucket(index); | |
313 probe != NULL; | |
314 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
315 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
316 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 317 // only take klass is we have the entry with the defining class loader |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
318 InstanceKlass::cast(k)->methods_do(f); |
0 | 319 } |
320 } | |
321 } | |
322 } | |
323 | |
324 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
325 Klass* Dictionary::try_get_next_class() { |
0 | 326 while (true) { |
327 if (_current_class_entry != NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
328 Klass* k = _current_class_entry->klass(); |
0 | 329 _current_class_entry = _current_class_entry->next(); |
330 return k; | |
331 } | |
332 _current_class_index = (_current_class_index + 1) % table_size(); | |
333 _current_class_entry = bucket(_current_class_index); | |
334 } | |
335 // never reached | |
336 } | |
337 | |
338 | |
339 // Add a loaded class to the system dictionary. | |
340 // Readers of the SystemDictionary aren't always locked, so _buckets | |
341 // is volatile. The store of the next field in the constructor is | |
342 // also cast to volatile; we do this to ensure store order is maintained | |
343 // by the compilers. | |
344 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
345 void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
0 | 346 KlassHandle obj) { |
347 assert_locked_or_safepoint(SystemDictionary_lock); | |
348 assert(obj() != NULL, "adding NULL obj"); | |
6983 | 349 assert(obj()->name() == class_name, "sanity check on name"); |
8667
1f9994892f89
8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents:
7185
diff
changeset
|
350 assert(loader_data != NULL, "Must be non-NULL"); |
0 | 351 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
352 unsigned int hash = compute_hash(class_name, loader_data); |
0 | 353 int index = hash_to_index(hash); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
354 DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
0 | 355 add_entry(index, entry); |
356 } | |
357 | |
358 | |
359 // This routine does not lock the system dictionary. | |
360 // | |
361 // Since readers don't hold a lock, we must make sure that system | |
362 // dictionary entries are only removed at a safepoint (when only one | |
363 // thread is running), and are added to in a safe way (all links must | |
364 // be updated in an MT-safe manner). | |
365 // | |
366 // Callers should be aware that an entry could be added just after | |
367 // _buckets[index] is read here, so the caller will not see the new entry. | |
368 DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
369 Symbol* class_name, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
370 ClassLoaderData* loader_data) { |
0 | 371 debug_only(_lookup_count++); |
372 for (DictionaryEntry* entry = bucket(index); | |
373 entry != NULL; | |
374 entry = entry->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
375 if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
0 | 376 return entry; |
377 } | |
378 debug_only(_lookup_length++); | |
379 } | |
380 return NULL; | |
381 } | |
382 | |
383 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
384 Klass* Dictionary::find(int index, unsigned int hash, Symbol* name, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
385 ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
386 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 387 if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
388 return entry->klass(); | |
389 } else { | |
390 return NULL; | |
391 } | |
392 } | |
393 | |
394 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
395 Klass* Dictionary::find_class(int index, unsigned int hash, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
396 Symbol* name, ClassLoaderData* loader_data) { |
0 | 397 assert_locked_or_safepoint(SystemDictionary_lock); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
398 assert (index == index_for(name, loader_data), "incorrect index?"); |
0 | 399 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
400 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
401 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 402 } |
403 | |
404 | |
405 // Variant of find_class for shared classes. No locking required, as | |
406 // that table is static. | |
407 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
408 Klass* Dictionary::find_shared_class(int index, unsigned int hash, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
409 Symbol* name) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
410 assert (index == index_for(name, NULL), "incorrect index?"); |
0 | 411 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
412 DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
413 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 414 } |
415 | |
416 | |
417 void Dictionary::add_protection_domain(int index, unsigned int hash, | |
418 instanceKlassHandle klass, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
419 ClassLoaderData* loader_data, Handle protection_domain, |
0 | 420 TRAPS) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
421 Symbol* klass_name = klass->name(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
422 DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
0 | 423 |
424 assert(entry != NULL,"entry must be present, we just created it"); | |
425 assert(protection_domain() != NULL, | |
426 "real protection domain should be present"); | |
427 | |
428 entry->add_protection_domain(protection_domain()); | |
429 | |
430 assert(entry->contains_protection_domain(protection_domain()), | |
431 "now protection domain should be present"); | |
432 } | |
433 | |
434 | |
435 bool Dictionary::is_valid_protection_domain(int index, unsigned int hash, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
436 Symbol* name, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
437 ClassLoaderData* loader_data, |
0 | 438 Handle protection_domain) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
439 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 440 return entry->is_valid_protection_domain(protection_domain); |
441 } | |
442 | |
443 | |
444 void Dictionary::reorder_dictionary() { | |
445 | |
446 // Copy all the dictionary entries into a single master list. | |
447 | |
448 DictionaryEntry* master_list = NULL; | |
449 for (int i = 0; i < table_size(); ++i) { | |
450 DictionaryEntry* p = bucket(i); | |
451 while (p != NULL) { | |
452 DictionaryEntry* tmp; | |
453 tmp = p->next(); | |
454 p->set_next(master_list); | |
455 master_list = p; | |
456 p = tmp; | |
457 } | |
458 set_entry(i, NULL); | |
459 } | |
460 | |
461 // Add the dictionary entries back to the list in the correct buckets. | |
462 while (master_list != NULL) { | |
463 DictionaryEntry* p = master_list; | |
464 master_list = master_list->next(); | |
465 p->set_next(NULL); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
466 Symbol* class_name = InstanceKlass::cast((Klass*)(p->klass()))->name(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
467 // Since the null class loader data isn't copied to the CDS archive, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
468 // compute the hash with NULL for loader data. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
469 unsigned int hash = compute_hash(class_name, NULL); |
0 | 470 int index = hash_to_index(hash); |
471 p->set_hash(hash); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
472 p->set_loader_data(NULL); // loader_data isn't copied to CDS |
0 | 473 p->set_next(bucket(index)); |
474 set_entry(index, p); | |
475 } | |
476 } | |
477 | |
710 | 478 SymbolPropertyTable::SymbolPropertyTable(int table_size) |
6197 | 479 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
710 | 480 { |
481 } | |
6197 | 482 SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
710 | 483 int number_of_entries) |
6197 | 484 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
710 | 485 { |
486 } | |
487 | |
488 | |
489 SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
490 Symbol* sym, |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
491 intptr_t sym_mode) { |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
492 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
710 | 493 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
494 if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
710 | 495 return p; |
496 } | |
497 } | |
498 return NULL; | |
499 } | |
500 | |
501 | |
502 SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
503 Symbol* sym, intptr_t sym_mode) { |
710 | 504 assert_locked_or_safepoint(SystemDictionary_lock); |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
505 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
506 assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
710 | 507 |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
508 SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
6197 | 509 Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
710 | 510 return p; |
511 } | |
512 | |
513 void SymbolPropertyTable::oops_do(OopClosure* f) { | |
514 for (int index = 0; index < table_size(); index++) { | |
515 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
516 if (p->method_type() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
517 f->do_oop(p->method_type_addr()); |
710 | 518 } |
519 } | |
520 } | |
521 } | |
522 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
523 void SymbolPropertyTable::methods_do(void f(Method*)) { |
710 | 524 for (int index = 0; index < table_size(); index++) { |
525 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
526 Method* prop = p->method(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
527 if (prop != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
528 f((Method*)prop); |
710 | 529 } |
530 } | |
531 } | |
532 } | |
533 | |
0 | 534 |
535 // ---------------------------------------------------------------------------- | |
536 #ifndef PRODUCT | |
537 | |
538 void Dictionary::print() { | |
539 ResourceMark rm; | |
540 HandleMark hm; | |
541 | |
4864
b2cd0ee8f778
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
2426
diff
changeset
|
542 tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
b2cd0ee8f778
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
2426
diff
changeset
|
543 table_size(), number_of_entries()); |
0 | 544 tty->print_cr("^ indicates that initiating loader is different from " |
545 "defining loader"); | |
546 | |
547 for (int index = 0; index < table_size(); index++) { | |
548 for (DictionaryEntry* probe = bucket(index); | |
549 probe != NULL; | |
550 probe = probe->next()) { | |
551 if (Verbose) tty->print("%4d: ", index); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
552 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
553 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 554 bool is_defining_class = |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
555 (loader_data == InstanceKlass::cast(e)->class_loader_data()); |
0 | 556 tty->print("%s%s", is_defining_class ? " " : "^", |
6983 | 557 e->external_name()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
558 |
0 | 559 tty->print(", loader "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
560 loader_data->print_value(); |
0 | 561 tty->cr(); |
562 } | |
563 } | |
564 } | |
565 | |
566 #endif | |
567 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
568 |
0 | 569 void Dictionary::verify() { |
570 guarantee(number_of_entries() >= 0, "Verify of system dictionary failed"); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
571 |
0 | 572 int element_count = 0; |
573 for (int index = 0; index < table_size(); index++) { | |
574 for (DictionaryEntry* probe = bucket(index); | |
575 probe != NULL; | |
576 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
577 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
578 ClassLoaderData* loader_data = probe->loader_data(); |
6983 | 579 guarantee(e->oop_is_instance(), |
0 | 580 "Verify of system dictionary failed"); |
581 // class loader must be present; a null class loader is the | |
582 // boostrap loader | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
583 guarantee(loader_data != NULL || DumpSharedSpaces || |
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6983
diff
changeset
|
584 loader_data->class_loader() == NULL || |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
585 loader_data->class_loader()->is_instance(), |
0 | 586 "checking type of class_loader"); |
587 e->verify(); | |
588 probe->verify_protection_domain_set(); | |
589 element_count++; | |
590 } | |
591 } | |
592 guarantee(number_of_entries() == element_count, | |
593 "Verify of system dictionary failed"); | |
594 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
595 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
596 |