Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/dictionary.cpp @ 17794:3514ee402842
8029101: PPC64 (part 211): ordering of Independent Reads of Independent Writes
Reviewed-by: dholmes, kvn
Contributed-by: martin.doerr@sap.com
author | goetz |
---|---|
date | Thu, 16 Jan 2014 14:25:51 +0100 |
parents | aa6f2ea19d8f |
children | 48314d596a04 |
rev | line source |
---|---|
0 | 1 /* |
12837 | 2 * Copyright (c) 2003, 2013, 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" | |
12837 | 28 #include "memory/iterator.hpp" |
1972 | 29 #include "oops/oop.inline.hpp" |
30 #include "prims/jvmtiRedefineClassesTrace.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; | |
12837 | 42 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
0 | 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; | |
12837 | 51 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
0 | 52 }; |
53 | |
12837 | 54 ProtectionDomainCacheEntry* Dictionary::cache_get(oop protection_domain) { |
55 return _pd_cache_table->get(protection_domain); | |
56 } | |
0 | 57 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
58 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
|
59 ClassLoaderData* loader_data) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
60 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
|
61 entry->set_loader_data(loader_data); |
0 | 62 entry->set_pd_set(NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
63 assert(klass->oop_is_instance(), "Must be"); |
0 | 64 return entry; |
65 } | |
66 | |
67 | |
68 void Dictionary::free_entry(DictionaryEntry* entry) { | |
69 // avoid recursion when deleting linked list | |
70 while (entry->pd_set() != NULL) { | |
71 ProtectionDomainEntry* to_delete = entry->pd_set(); | |
72 entry->set_pd_set(to_delete->next()); | |
73 delete to_delete; | |
74 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
75 Hashtable<Klass*, mtClass>::free_entry(entry); |
0 | 76 } |
77 | |
78 | |
79 bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { | |
80 #ifdef ASSERT | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
81 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 82 // Ensure this doesn't show up in the pd_set (invariant) |
83 bool in_pd_set = false; | |
84 for (ProtectionDomainEntry* current = _pd_set; | |
85 current != NULL; | |
86 current = current->next()) { | |
87 if (current->protection_domain() == protection_domain) { | |
88 in_pd_set = true; | |
89 break; | |
90 } | |
91 } | |
92 if (in_pd_set) { | |
93 assert(false, "A klass's protection domain should not show up " | |
94 "in its sys. dict. PD set"); | |
95 } | |
96 } | |
97 #endif /* ASSERT */ | |
98 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
99 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 100 // Succeeds trivially |
101 return true; | |
102 } | |
103 | |
104 for (ProtectionDomainEntry* current = _pd_set; | |
105 current != NULL; | |
106 current = current->next()) { | |
107 if (current->protection_domain() == protection_domain) return true; | |
108 } | |
109 return false; | |
110 } | |
111 | |
112 | |
12837 | 113 void DictionaryEntry::add_protection_domain(Dictionary* dict, oop protection_domain) { |
0 | 114 assert_locked_or_safepoint(SystemDictionary_lock); |
115 if (!contains_protection_domain(protection_domain)) { | |
12837 | 116 ProtectionDomainCacheEntry* entry = dict->cache_get(protection_domain); |
0 | 117 ProtectionDomainEntry* new_head = |
12837 | 118 new ProtectionDomainEntry(entry, _pd_set); |
0 | 119 // Warning: Preserve store ordering. The SystemDictionary is read |
120 // without locks. The new ProtectionDomainEntry must be | |
121 // complete before other threads can be allowed to see it | |
122 // via a store to _pd_set. | |
123 OrderAccess::release_store_ptr(&_pd_set, new_head); | |
124 } | |
125 if (TraceProtectionDomainVerification && WizardMode) { | |
126 print(); | |
127 } | |
128 } | |
129 | |
130 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
131 bool Dictionary::do_unloading() { |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
710
diff
changeset
|
132 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 133 bool class_was_unloaded = false; |
134 int index = 0; // Defined here for portability! Do not move | |
135 | |
136 // Remove unloadable entries and classes from system dictionary | |
137 // The placeholder array has been handled in always_strong_oops_do. | |
138 DictionaryEntry* probe = NULL; | |
139 for (index = 0; index < table_size(); index++) { | |
140 for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { | |
141 probe = *p; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
142 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
143 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 144 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
145 InstanceKlass* ik = InstanceKlass::cast(e); |
0 | 146 |
147 // 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
|
148 if (!is_strongly_reachable(loader_data, e)) { |
0 | 149 // 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
|
150 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
|
151 ClassLoaderData* k_def_class_loader_data = ik->class_loader_data(); |
0 | 152 |
153 // Do we need to delete this system dictionary entry? | |
154 bool purge_entry = false; | |
155 | |
156 // 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
|
157 if (loader_data->is_unloading()) { |
0 | 158 // If the loader is not live this entry should always be |
159 // removed (will never be looked up again). Note that this is | |
160 // 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
|
161 if (k_def_class_loader_data == loader_data) { |
0 | 162 // This is the defining entry, so the referred class is about |
163 // to be unloaded. | |
164 class_was_unloaded = true; | |
165 } | |
166 // Also remove this system dictionary entry. | |
167 purge_entry = true; | |
168 | |
169 } else { | |
170 // 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
|
171 // (determined by checking the defining class loader) |
0 | 172 // the loader must be an initiating loader (rather than the |
173 // defining loader). Remove this entry. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
174 if (k_def_class_loader_data->is_unloading()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
175 // If we get here, the class_loader_data must not be the defining |
0 | 176 // loader, it must be an initiating one. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
177 assert(k_def_class_loader_data != loader_data, |
0 | 178 "cannot have live defining loader and unreachable klass"); |
179 // Loader is live, but class and its defining loader are dead. | |
180 // Remove the entry. The class is going away. | |
181 purge_entry = true; | |
182 } | |
183 } | |
184 | |
185 if (purge_entry) { | |
186 *p = probe->next(); | |
187 if (probe == _current_class_entry) { | |
188 _current_class_entry = NULL; | |
189 } | |
190 free_entry(probe); | |
191 continue; | |
192 } | |
193 } | |
194 p = probe->next_addr(); | |
195 } | |
196 } | |
197 return class_was_unloaded; | |
198 } | |
199 | |
200 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
201 void Dictionary::always_strong_oops_do(OopClosure* blk) { |
12837 | 202 // Follow all system classes and temporary placeholders in dictionary; only |
203 // protection domain oops contain references into the heap. In a first | |
204 // pass over the system dictionary determine which need to be treated as | |
205 // strongly reachable and mark them as such. | |
0 | 206 for (int index = 0; index < table_size(); index++) { |
207 for (DictionaryEntry *probe = bucket(index); | |
208 probe != NULL; | |
209 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
210 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
211 ClassLoaderData* loader_data = probe->loader_data(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
212 if (is_strongly_reachable(loader_data, e)) { |
12837 | 213 probe->set_strongly_reachable(); |
0 | 214 } |
215 } | |
216 } | |
12837 | 217 // Then iterate over the protection domain cache to apply the closure on the |
218 // previously marked ones. | |
219 _pd_cache_table->always_strong_oops_do(blk); | |
0 | 220 } |
221 | |
222 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
223 void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
224 // Follow all system classes and temporary placeholders in dictionary |
0 | 225 for (int index = 0; index < table_size(); index++) { |
226 for (DictionaryEntry* probe = bucket(index); | |
227 probe != NULL; | |
228 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
229 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
230 ClassLoaderData* loader_data = probe->loader_data(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
231 if (is_strongly_reachable(loader_data, e)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
232 closure->do_klass(e); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
233 } |
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 // Just the classes from defining class loaders |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
240 void Dictionary::classes_do(void f(Klass*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
241 for (int index = 0; index < table_size(); index++) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
242 for (DictionaryEntry* probe = bucket(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
243 probe != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
244 probe = probe->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
245 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
246 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 247 f(k); |
248 } | |
249 } | |
250 } | |
251 } | |
252 | |
253 // Added for initialize_itable_for_klass to handle exceptions | |
254 // Just the classes from defining class loaders | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
255 void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
0 | 256 for (int index = 0; index < table_size(); index++) { |
257 for (DictionaryEntry* probe = bucket(index); | |
258 probe != NULL; | |
259 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
260 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
261 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 262 f(k, CHECK); |
263 } | |
264 } | |
265 } | |
266 } | |
267 | |
268 // All classes, and their class loaders | |
269 // Don't iterate over placeholders | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
270 void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
0 | 271 for (int index = 0; index < table_size(); index++) { |
272 for (DictionaryEntry* probe = bucket(index); | |
273 probe != NULL; | |
274 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
275 Klass* k = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
276 f(k, probe->loader_data()); |
0 | 277 } |
278 } | |
279 } | |
280 | |
281 void Dictionary::oops_do(OopClosure* f) { | |
12837 | 282 // Only the protection domain oops contain references into the heap. Iterate |
283 // over all of them. | |
284 _pd_cache_table->oops_do(f); | |
0 | 285 } |
286 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
287 void Dictionary::methods_do(void f(Method*)) { |
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 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 294 // 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
|
295 InstanceKlass::cast(k)->methods_do(f); |
0 | 296 } |
297 } | |
298 } | |
299 } | |
300 | |
12837 | 301 void Dictionary::unlink(BoolObjectClosure* is_alive) { |
302 // Only the protection domain cache table may contain references to the heap | |
303 // that need to be unlinked. | |
304 _pd_cache_table->unlink(is_alive); | |
305 } | |
0 | 306 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
307 Klass* Dictionary::try_get_next_class() { |
0 | 308 while (true) { |
309 if (_current_class_entry != NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
310 Klass* k = _current_class_entry->klass(); |
0 | 311 _current_class_entry = _current_class_entry->next(); |
312 return k; | |
313 } | |
314 _current_class_index = (_current_class_index + 1) % table_size(); | |
315 _current_class_entry = bucket(_current_class_index); | |
316 } | |
317 // never reached | |
318 } | |
319 | |
320 // Add a loaded class to the system dictionary. | |
321 // Readers of the SystemDictionary aren't always locked, so _buckets | |
322 // is volatile. The store of the next field in the constructor is | |
323 // also cast to volatile; we do this to ensure store order is maintained | |
324 // by the compilers. | |
325 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
326 void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
0 | 327 KlassHandle obj) { |
328 assert_locked_or_safepoint(SystemDictionary_lock); | |
329 assert(obj() != NULL, "adding NULL obj"); | |
6983 | 330 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
|
331 assert(loader_data != NULL, "Must be non-NULL"); |
0 | 332 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
333 unsigned int hash = compute_hash(class_name, loader_data); |
0 | 334 int index = hash_to_index(hash); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
335 DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
0 | 336 add_entry(index, entry); |
337 } | |
338 | |
339 | |
340 // This routine does not lock the system dictionary. | |
341 // | |
342 // Since readers don't hold a lock, we must make sure that system | |
343 // dictionary entries are only removed at a safepoint (when only one | |
344 // thread is running), and are added to in a safe way (all links must | |
345 // be updated in an MT-safe manner). | |
346 // | |
347 // Callers should be aware that an entry could be added just after | |
348 // _buckets[index] is read here, so the caller will not see the new entry. | |
349 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
|
350 Symbol* class_name, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
351 ClassLoaderData* loader_data) { |
0 | 352 debug_only(_lookup_count++); |
353 for (DictionaryEntry* entry = bucket(index); | |
354 entry != NULL; | |
355 entry = entry->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
356 if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
0 | 357 return entry; |
358 } | |
359 debug_only(_lookup_length++); | |
360 } | |
361 return NULL; | |
362 } | |
363 | |
364 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
365 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
|
366 ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
367 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 368 if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
369 return entry->klass(); | |
370 } else { | |
371 return NULL; | |
372 } | |
373 } | |
374 | |
375 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
376 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
|
377 Symbol* name, ClassLoaderData* loader_data) { |
0 | 378 assert_locked_or_safepoint(SystemDictionary_lock); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
379 assert (index == index_for(name, loader_data), "incorrect index?"); |
0 | 380 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
381 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
|
382 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 383 } |
384 | |
385 | |
386 // Variant of find_class for shared classes. No locking required, as | |
387 // that table is static. | |
388 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
389 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
|
390 Symbol* name) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
391 assert (index == index_for(name, NULL), "incorrect index?"); |
0 | 392 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
393 DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
394 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 395 } |
396 | |
397 | |
398 void Dictionary::add_protection_domain(int index, unsigned int hash, | |
399 instanceKlassHandle klass, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
400 ClassLoaderData* loader_data, Handle protection_domain, |
0 | 401 TRAPS) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
402 Symbol* klass_name = klass->name(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
403 DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
0 | 404 |
405 assert(entry != NULL,"entry must be present, we just created it"); | |
406 assert(protection_domain() != NULL, | |
407 "real protection domain should be present"); | |
408 | |
12837 | 409 entry->add_protection_domain(this, protection_domain()); |
0 | 410 |
411 assert(entry->contains_protection_domain(protection_domain()), | |
412 "now protection domain should be present"); | |
413 } | |
414 | |
415 | |
416 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
|
417 Symbol* name, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
418 ClassLoaderData* loader_data, |
0 | 419 Handle protection_domain) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
420 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 421 return entry->is_valid_protection_domain(protection_domain); |
422 } | |
423 | |
424 | |
425 void Dictionary::reorder_dictionary() { | |
426 | |
427 // Copy all the dictionary entries into a single master list. | |
428 | |
429 DictionaryEntry* master_list = NULL; | |
430 for (int i = 0; i < table_size(); ++i) { | |
431 DictionaryEntry* p = bucket(i); | |
432 while (p != NULL) { | |
433 DictionaryEntry* tmp; | |
434 tmp = p->next(); | |
435 p->set_next(master_list); | |
436 master_list = p; | |
437 p = tmp; | |
438 } | |
439 set_entry(i, NULL); | |
440 } | |
441 | |
442 // Add the dictionary entries back to the list in the correct buckets. | |
443 while (master_list != NULL) { | |
444 DictionaryEntry* p = master_list; | |
445 master_list = master_list->next(); | |
446 p->set_next(NULL); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
447 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
|
448 // 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
|
449 // compute the hash with NULL for loader data. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
450 unsigned int hash = compute_hash(class_name, NULL); |
0 | 451 int index = hash_to_index(hash); |
452 p->set_hash(hash); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
453 p->set_loader_data(NULL); // loader_data isn't copied to CDS |
0 | 454 p->set_next(bucket(index)); |
455 set_entry(index, p); | |
456 } | |
457 } | |
458 | |
12837 | 459 ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
460 : Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) | |
461 { | |
462 } | |
463 | |
464 void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { | |
465 assert(SafepointSynchronize::is_at_safepoint(), "must be"); | |
466 for (int i = 0; i < table_size(); ++i) { | |
467 ProtectionDomainCacheEntry** p = bucket_addr(i); | |
468 ProtectionDomainCacheEntry* entry = bucket(i); | |
469 while (entry != NULL) { | |
470 if (is_alive->do_object_b(entry->literal())) { | |
471 p = entry->next_addr(); | |
472 } else { | |
473 *p = entry->next(); | |
474 free_entry(entry); | |
475 } | |
476 entry = *p; | |
477 } | |
478 } | |
479 } | |
480 | |
481 void ProtectionDomainCacheTable::oops_do(OopClosure* f) { | |
482 for (int index = 0; index < table_size(); index++) { | |
483 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
484 probe != NULL; | |
485 probe = probe->next()) { | |
486 probe->oops_do(f); | |
487 } | |
488 } | |
489 } | |
490 | |
491 uint ProtectionDomainCacheTable::bucket_size() { | |
492 return sizeof(ProtectionDomainCacheEntry); | |
493 } | |
494 | |
495 #ifndef PRODUCT | |
496 void ProtectionDomainCacheTable::print() { | |
497 tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", | |
498 table_size(), number_of_entries()); | |
499 for (int index = 0; index < table_size(); index++) { | |
500 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
501 probe != NULL; | |
502 probe = probe->next()) { | |
503 probe->print(); | |
504 } | |
505 } | |
506 } | |
507 | |
508 void ProtectionDomainCacheEntry::print() { | |
509 tty->print_cr("entry "PTR_FORMAT" value "PTR_FORMAT" strongly_reachable %d next "PTR_FORMAT, | |
12840 | 510 this, (void*)literal(), _strongly_reachable, next()); |
12837 | 511 } |
512 #endif | |
513 | |
514 void ProtectionDomainCacheTable::verify() { | |
515 int element_count = 0; | |
516 for (int index = 0; index < table_size(); index++) { | |
517 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
518 probe != NULL; | |
519 probe = probe->next()) { | |
520 probe->verify(); | |
521 element_count++; | |
522 } | |
523 } | |
524 guarantee(number_of_entries() == element_count, | |
525 "Verify of protection domain cache table failed"); | |
526 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
527 } | |
528 | |
529 void ProtectionDomainCacheEntry::verify() { | |
530 guarantee(literal()->is_oop(), "must be an oop"); | |
531 } | |
532 | |
533 void ProtectionDomainCacheTable::always_strong_oops_do(OopClosure* f) { | |
534 // the caller marked the protection domain cache entries that we need to apply | |
535 // the closure on. Only process them. | |
536 for (int index = 0; index < table_size(); index++) { | |
537 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
538 probe != NULL; | |
539 probe = probe->next()) { | |
540 if (probe->is_strongly_reachable()) { | |
541 probe->reset_strongly_reachable(); | |
542 probe->oops_do(f); | |
543 } | |
544 } | |
545 } | |
546 } | |
547 | |
548 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(oop protection_domain) { | |
549 unsigned int hash = compute_hash(protection_domain); | |
550 int index = hash_to_index(hash); | |
551 | |
552 ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); | |
553 if (entry == NULL) { | |
554 entry = add_entry(index, hash, protection_domain); | |
555 } | |
556 return entry; | |
557 } | |
558 | |
559 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, oop protection_domain) { | |
560 for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { | |
561 if (e->protection_domain() == protection_domain) { | |
562 return e; | |
563 } | |
564 } | |
565 | |
566 return NULL; | |
567 } | |
568 | |
569 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, oop protection_domain) { | |
570 assert_locked_or_safepoint(SystemDictionary_lock); | |
571 assert(index == index_for(protection_domain), "incorrect index?"); | |
572 assert(find_entry(index, protection_domain) == NULL, "no double entry"); | |
573 | |
574 ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); | |
575 Hashtable<oop, mtClass>::add_entry(index, p); | |
576 return p; | |
577 } | |
578 | |
579 void ProtectionDomainCacheTable::free(ProtectionDomainCacheEntry* to_delete) { | |
580 unsigned int hash = compute_hash(to_delete->protection_domain()); | |
581 int index = hash_to_index(hash); | |
582 | |
583 ProtectionDomainCacheEntry** p = bucket_addr(index); | |
584 ProtectionDomainCacheEntry* entry = bucket(index); | |
585 while (true) { | |
586 assert(entry != NULL, "sanity"); | |
587 | |
588 if (entry == to_delete) { | |
589 *p = entry->next(); | |
590 Hashtable<oop, mtClass>::free_entry(entry); | |
591 break; | |
592 } else { | |
593 p = entry->next_addr(); | |
594 entry = *p; | |
595 } | |
596 } | |
597 } | |
598 | |
710 | 599 SymbolPropertyTable::SymbolPropertyTable(int table_size) |
6197 | 600 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
710 | 601 { |
602 } | |
6197 | 603 SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
710 | 604 int number_of_entries) |
6197 | 605 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
710 | 606 { |
607 } | |
608 | |
609 | |
610 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
|
611 Symbol* sym, |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
612 intptr_t sym_mode) { |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
613 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
710 | 614 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
|
615 if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
710 | 616 return p; |
617 } | |
618 } | |
619 return NULL; | |
620 } | |
621 | |
622 | |
623 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
|
624 Symbol* sym, intptr_t sym_mode) { |
710 | 625 assert_locked_or_safepoint(SystemDictionary_lock); |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
626 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
710
diff
changeset
|
627 assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
710 | 628 |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
629 SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
6197 | 630 Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
710 | 631 return p; |
632 } | |
633 | |
634 void SymbolPropertyTable::oops_do(OopClosure* f) { | |
635 for (int index = 0; index < table_size(); index++) { | |
636 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
|
637 if (p->method_type() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
638 f->do_oop(p->method_type_addr()); |
710 | 639 } |
640 } | |
641 } | |
642 } | |
643 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
644 void SymbolPropertyTable::methods_do(void f(Method*)) { |
710 | 645 for (int index = 0; index < table_size(); index++) { |
646 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
|
647 Method* prop = p->method(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
648 if (prop != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
649 f((Method*)prop); |
710 | 650 } |
651 } | |
652 } | |
653 } | |
654 | |
0 | 655 |
656 // ---------------------------------------------------------------------------- | |
657 #ifndef PRODUCT | |
658 | |
659 void Dictionary::print() { | |
660 ResourceMark rm; | |
661 HandleMark hm; | |
662 | |
4864
b2cd0ee8f778
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
2426
diff
changeset
|
663 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
|
664 table_size(), number_of_entries()); |
0 | 665 tty->print_cr("^ indicates that initiating loader is different from " |
666 "defining loader"); | |
667 | |
668 for (int index = 0; index < table_size(); index++) { | |
669 for (DictionaryEntry* probe = bucket(index); | |
670 probe != NULL; | |
671 probe = probe->next()) { | |
672 if (Verbose) tty->print("%4d: ", index); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
673 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
674 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 675 bool is_defining_class = |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
676 (loader_data == InstanceKlass::cast(e)->class_loader_data()); |
0 | 677 tty->print("%s%s", is_defining_class ? " " : "^", |
6983 | 678 e->external_name()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
679 |
0 | 680 tty->print(", loader "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
681 loader_data->print_value(); |
0 | 682 tty->cr(); |
683 } | |
684 } | |
12837 | 685 tty->cr(); |
686 _pd_cache_table->print(); | |
687 tty->cr(); | |
0 | 688 } |
689 | |
690 #endif | |
691 | |
692 void Dictionary::verify() { | |
693 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
|
694 |
0 | 695 int element_count = 0; |
696 for (int index = 0; index < table_size(); index++) { | |
697 for (DictionaryEntry* probe = bucket(index); | |
698 probe != NULL; | |
699 probe = probe->next()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
700 Klass* e = probe->klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
701 ClassLoaderData* loader_data = probe->loader_data(); |
6983 | 702 guarantee(e->oop_is_instance(), |
0 | 703 "Verify of system dictionary failed"); |
704 // class loader must be present; a null class loader is the | |
705 // boostrap loader | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
706 guarantee(loader_data != NULL || DumpSharedSpaces || |
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6983
diff
changeset
|
707 loader_data->class_loader() == NULL || |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
708 loader_data->class_loader()->is_instance(), |
0 | 709 "checking type of class_loader"); |
11034 | 710 e->verify(/*check_dictionary*/false); |
0 | 711 probe->verify_protection_domain_set(); |
712 element_count++; | |
713 } | |
714 } | |
715 guarantee(number_of_entries() == element_count, | |
716 "Verify of system dictionary failed"); | |
717 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
12837 | 718 |
719 _pd_cache_table->verify(); | |
0 | 720 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
721 |