Mercurial > hg > truffle
annotate src/share/vm/classfile/dictionary.cpp @ 21167:ab451b6de9f8
Interop: introduce separate global language scope
author | Matthias Grimmer <grimmer@ssw.jku.at> |
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date | Thu, 30 Apr 2015 17:27:53 +0200 |
parents | 7848fc12602b |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2014, 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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" | |
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31 #include "runtime/orderAccess.inline.hpp" |
1972 | 32 #include "utilities/hashtable.inline.hpp" |
0 | 33 |
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34 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 35 |
36 DictionaryEntry* Dictionary::_current_class_entry = NULL; | |
37 int Dictionary::_current_class_index = 0; | |
38 | |
39 | |
40 Dictionary::Dictionary(int table_size) | |
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41 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry)) { |
0 | 42 _current_class_index = 0; |
43 _current_class_entry = NULL; | |
12837 | 44 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
0 | 45 }; |
46 | |
47 | |
6197 | 48 Dictionary::Dictionary(int table_size, HashtableBucket<mtClass>* t, |
0 | 49 int number_of_entries) |
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50 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry), t, number_of_entries) { |
0 | 51 _current_class_index = 0; |
52 _current_class_entry = NULL; | |
12837 | 53 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
0 | 54 }; |
55 | |
12837 | 56 ProtectionDomainCacheEntry* Dictionary::cache_get(oop protection_domain) { |
57 return _pd_cache_table->get(protection_domain); | |
58 } | |
0 | 59 |
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60 DictionaryEntry* Dictionary::new_entry(unsigned int hash, Klass* klass, |
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61 ClassLoaderData* loader_data) { |
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62 DictionaryEntry* entry = (DictionaryEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass); |
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63 entry->set_loader_data(loader_data); |
0 | 64 entry->set_pd_set(NULL); |
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65 assert(klass->oop_is_instance(), "Must be"); |
0 | 66 return entry; |
67 } | |
68 | |
69 | |
70 void Dictionary::free_entry(DictionaryEntry* entry) { | |
71 // avoid recursion when deleting linked list | |
72 while (entry->pd_set() != NULL) { | |
73 ProtectionDomainEntry* to_delete = entry->pd_set(); | |
74 entry->set_pd_set(to_delete->next()); | |
75 delete to_delete; | |
76 } | |
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77 Hashtable<Klass*, mtClass>::free_entry(entry); |
0 | 78 } |
79 | |
80 | |
81 bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { | |
82 #ifdef ASSERT | |
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83 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 84 // Ensure this doesn't show up in the pd_set (invariant) |
85 bool in_pd_set = false; | |
86 for (ProtectionDomainEntry* current = _pd_set; | |
87 current != NULL; | |
88 current = current->next()) { | |
89 if (current->protection_domain() == protection_domain) { | |
90 in_pd_set = true; | |
91 break; | |
92 } | |
93 } | |
94 if (in_pd_set) { | |
95 assert(false, "A klass's protection domain should not show up " | |
96 "in its sys. dict. PD set"); | |
97 } | |
98 } | |
99 #endif /* ASSERT */ | |
100 | |
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101 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
0 | 102 // Succeeds trivially |
103 return true; | |
104 } | |
105 | |
106 for (ProtectionDomainEntry* current = _pd_set; | |
107 current != NULL; | |
108 current = current->next()) { | |
109 if (current->protection_domain() == protection_domain) return true; | |
110 } | |
111 return false; | |
112 } | |
113 | |
114 | |
12837 | 115 void DictionaryEntry::add_protection_domain(Dictionary* dict, oop protection_domain) { |
0 | 116 assert_locked_or_safepoint(SystemDictionary_lock); |
117 if (!contains_protection_domain(protection_domain)) { | |
12837 | 118 ProtectionDomainCacheEntry* entry = dict->cache_get(protection_domain); |
0 | 119 ProtectionDomainEntry* new_head = |
12837 | 120 new ProtectionDomainEntry(entry, _pd_set); |
0 | 121 // Warning: Preserve store ordering. The SystemDictionary is read |
122 // without locks. The new ProtectionDomainEntry must be | |
123 // complete before other threads can be allowed to see it | |
124 // via a store to _pd_set. | |
125 OrderAccess::release_store_ptr(&_pd_set, new_head); | |
126 } | |
127 if (TraceProtectionDomainVerification && WizardMode) { | |
128 print(); | |
129 } | |
130 } | |
131 | |
132 | |
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133 void Dictionary::do_unloading() { |
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134 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 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; | |
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139 for (int index = 0; index < table_size(); index++) { |
0 | 140 for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { |
141 probe = *p; | |
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142 Klass* e = probe->klass(); |
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143 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 144 |
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145 InstanceKlass* ik = InstanceKlass::cast(e); |
0 | 146 |
147 // Non-unloadable classes were handled in always_strong_oops_do | |
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148 if (!is_strongly_reachable(loader_data, e)) { |
0 | 149 // Entry was not visited in phase1 (negated test from phase1) |
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150 assert(!loader_data->is_the_null_class_loader_data(), "unloading entry with null class loader"); |
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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? | |
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157 if (loader_data->is_unloading()) { |
0 | 158 // If the loader is not live this entry should always be |
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159 // removed (will never be looked up again). |
0 | 160 purge_entry = true; |
161 } else { | |
162 // The loader in this entry is alive. If the klass is dead, | |
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163 // (determined by checking the defining class loader) |
0 | 164 // the loader must be an initiating loader (rather than the |
165 // defining loader). Remove this entry. | |
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166 if (k_def_class_loader_data->is_unloading()) { |
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167 // If we get here, the class_loader_data must not be the defining |
0 | 168 // loader, it must be an initiating one. |
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169 assert(k_def_class_loader_data != loader_data, |
0 | 170 "cannot have live defining loader and unreachable klass"); |
171 // Loader is live, but class and its defining loader are dead. | |
172 // Remove the entry. The class is going away. | |
173 purge_entry = true; | |
174 } | |
175 } | |
176 | |
177 if (purge_entry) { | |
178 *p = probe->next(); | |
179 if (probe == _current_class_entry) { | |
180 _current_class_entry = NULL; | |
181 } | |
182 free_entry(probe); | |
183 continue; | |
184 } | |
185 } | |
186 p = probe->next_addr(); | |
187 } | |
188 } | |
189 } | |
190 | |
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191 void Dictionary::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
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192 // Skip the strong roots probe marking if the closures are the same. |
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193 if (strong == weak) { |
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194 oops_do(strong); |
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195 return; |
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196 } |
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197 |
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198 for (int index = 0; index < table_size(); index++) { |
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199 for (DictionaryEntry *probe = bucket(index); |
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200 probe != NULL; |
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201 probe = probe->next()) { |
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202 Klass* e = probe->klass(); |
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203 ClassLoaderData* loader_data = probe->loader_data(); |
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204 if (is_strongly_reachable(loader_data, e)) { |
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205 probe->set_strongly_reachable(); |
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206 } |
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207 } |
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208 } |
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209 _pd_cache_table->roots_oops_do(strong, weak); |
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210 } |
0 | 211 |
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212 void Dictionary::remove_classes_in_error_state() { |
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213 assert(DumpSharedSpaces, "supported only when dumping"); |
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214 DictionaryEntry* probe = NULL; |
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215 for (int index = 0; index < table_size(); index++) { |
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216 for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { |
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217 probe = *p; |
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218 InstanceKlass* ik = InstanceKlass::cast(probe->klass()); |
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219 if (ik->is_in_error_state()) { // purge this entry |
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220 *p = probe->next(); |
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221 if (probe == _current_class_entry) { |
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222 _current_class_entry = NULL; |
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223 } |
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224 free_entry(probe); |
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225 ResourceMark rm; |
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226 tty->print_cr("Preload Warning: Removed error class: %s", ik->external_name()); |
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227 continue; |
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228 } |
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229 |
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230 p = probe->next_addr(); |
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231 } |
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232 } |
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233 } |
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234 |
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235 void Dictionary::always_strong_oops_do(OopClosure* blk) { |
12837 | 236 // Follow all system classes and temporary placeholders in dictionary; only |
237 // protection domain oops contain references into the heap. In a first | |
238 // pass over the system dictionary determine which need to be treated as | |
239 // strongly reachable and mark them as such. | |
0 | 240 for (int index = 0; index < table_size(); index++) { |
241 for (DictionaryEntry *probe = bucket(index); | |
242 probe != NULL; | |
243 probe = probe->next()) { | |
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244 Klass* e = probe->klass(); |
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245 ClassLoaderData* loader_data = probe->loader_data(); |
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246 if (is_strongly_reachable(loader_data, e)) { |
12837 | 247 probe->set_strongly_reachable(); |
0 | 248 } |
249 } | |
250 } | |
12837 | 251 // Then iterate over the protection domain cache to apply the closure on the |
252 // previously marked ones. | |
253 _pd_cache_table->always_strong_oops_do(blk); | |
0 | 254 } |
255 | |
256 | |
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257 void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
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258 // Follow all system classes and temporary placeholders in dictionary |
0 | 259 for (int index = 0; index < table_size(); index++) { |
260 for (DictionaryEntry* probe = bucket(index); | |
261 probe != NULL; | |
262 probe = probe->next()) { | |
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263 Klass* e = probe->klass(); |
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264 ClassLoaderData* loader_data = probe->loader_data(); |
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265 if (is_strongly_reachable(loader_data, e)) { |
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266 closure->do_klass(e); |
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267 } |
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268 } |
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269 } |
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270 } |
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271 |
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272 |
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273 // Just the classes from defining class loaders |
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274 void Dictionary::classes_do(void f(Klass*)) { |
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275 for (int index = 0; index < table_size(); index++) { |
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276 for (DictionaryEntry* probe = bucket(index); |
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277 probe != NULL; |
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278 probe = probe->next()) { |
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279 Klass* k = probe->klass(); |
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280 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 281 f(k); |
282 } | |
283 } | |
284 } | |
285 } | |
286 | |
287 // Added for initialize_itable_for_klass to handle exceptions | |
288 // Just the classes from defining class loaders | |
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289 void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
0 | 290 for (int index = 0; index < table_size(); index++) { |
291 for (DictionaryEntry* probe = bucket(index); | |
292 probe != NULL; | |
293 probe = probe->next()) { | |
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294 Klass* k = probe->klass(); |
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295 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 296 f(k, CHECK); |
297 } | |
298 } | |
299 } | |
300 } | |
301 | |
302 // All classes, and their class loaders | |
303 // Don't iterate over placeholders | |
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304 void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
0 | 305 for (int index = 0; index < table_size(); index++) { |
306 for (DictionaryEntry* probe = bucket(index); | |
307 probe != NULL; | |
308 probe = probe->next()) { | |
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309 Klass* k = probe->klass(); |
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310 f(k, probe->loader_data()); |
0 | 311 } |
312 } | |
313 } | |
314 | |
315 void Dictionary::oops_do(OopClosure* f) { | |
12837 | 316 // Only the protection domain oops contain references into the heap. Iterate |
317 // over all of them. | |
318 _pd_cache_table->oops_do(f); | |
0 | 319 } |
320 | |
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321 void Dictionary::methods_do(void f(Method*)) { |
0 | 322 for (int index = 0; index < table_size(); index++) { |
323 for (DictionaryEntry* probe = bucket(index); | |
324 probe != NULL; | |
325 probe = probe->next()) { | |
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326 Klass* k = probe->klass(); |
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327 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
0 | 328 // only take klass is we have the entry with the defining class loader |
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329 InstanceKlass::cast(k)->methods_do(f); |
0 | 330 } |
331 } | |
332 } | |
333 } | |
334 | |
12837 | 335 void Dictionary::unlink(BoolObjectClosure* is_alive) { |
336 // Only the protection domain cache table may contain references to the heap | |
337 // that need to be unlinked. | |
338 _pd_cache_table->unlink(is_alive); | |
339 } | |
0 | 340 |
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341 Klass* Dictionary::try_get_next_class() { |
0 | 342 while (true) { |
343 if (_current_class_entry != NULL) { | |
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344 Klass* k = _current_class_entry->klass(); |
0 | 345 _current_class_entry = _current_class_entry->next(); |
346 return k; | |
347 } | |
348 _current_class_index = (_current_class_index + 1) % table_size(); | |
349 _current_class_entry = bucket(_current_class_index); | |
350 } | |
351 // never reached | |
352 } | |
353 | |
354 // Add a loaded class to the system dictionary. | |
355 // Readers of the SystemDictionary aren't always locked, so _buckets | |
356 // is volatile. The store of the next field in the constructor is | |
357 // also cast to volatile; we do this to ensure store order is maintained | |
358 // by the compilers. | |
359 | |
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360 void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
0 | 361 KlassHandle obj) { |
362 assert_locked_or_safepoint(SystemDictionary_lock); | |
363 assert(obj() != NULL, "adding NULL obj"); | |
6983 | 364 assert(obj()->name() == class_name, "sanity check on name"); |
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365 assert(loader_data != NULL, "Must be non-NULL"); |
0 | 366 |
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367 unsigned int hash = compute_hash(class_name, loader_data); |
0 | 368 int index = hash_to_index(hash); |
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369 DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
0 | 370 add_entry(index, entry); |
371 } | |
372 | |
373 | |
374 // This routine does not lock the system dictionary. | |
375 // | |
376 // Since readers don't hold a lock, we must make sure that system | |
377 // dictionary entries are only removed at a safepoint (when only one | |
378 // thread is running), and are added to in a safe way (all links must | |
379 // be updated in an MT-safe manner). | |
380 // | |
381 // Callers should be aware that an entry could be added just after | |
382 // _buckets[index] is read here, so the caller will not see the new entry. | |
383 DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, | |
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384 Symbol* class_name, |
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385 ClassLoaderData* loader_data) { |
0 | 386 debug_only(_lookup_count++); |
387 for (DictionaryEntry* entry = bucket(index); | |
388 entry != NULL; | |
389 entry = entry->next()) { | |
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390 if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
0 | 391 return entry; |
392 } | |
393 debug_only(_lookup_length++); | |
394 } | |
395 return NULL; | |
396 } | |
397 | |
398 | |
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399 Klass* Dictionary::find(int index, unsigned int hash, Symbol* name, |
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400 ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
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401 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 402 if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
403 return entry->klass(); | |
404 } else { | |
405 return NULL; | |
406 } | |
407 } | |
408 | |
409 | |
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410 Klass* Dictionary::find_class(int index, unsigned int hash, |
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411 Symbol* name, ClassLoaderData* loader_data) { |
0 | 412 assert_locked_or_safepoint(SystemDictionary_lock); |
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413 assert (index == index_for(name, loader_data), "incorrect index?"); |
0 | 414 |
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415 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
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416 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 417 } |
418 | |
419 | |
420 // Variant of find_class for shared classes. No locking required, as | |
421 // that table is static. | |
422 | |
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423 Klass* Dictionary::find_shared_class(int index, unsigned int hash, |
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424 Symbol* name) { |
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425 assert (index == index_for(name, NULL), "incorrect index?"); |
0 | 426 |
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427 DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
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428 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
0 | 429 } |
430 | |
431 | |
432 void Dictionary::add_protection_domain(int index, unsigned int hash, | |
433 instanceKlassHandle klass, | |
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434 ClassLoaderData* loader_data, Handle protection_domain, |
0 | 435 TRAPS) { |
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436 Symbol* klass_name = klass->name(); |
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437 DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
0 | 438 |
439 assert(entry != NULL,"entry must be present, we just created it"); | |
440 assert(protection_domain() != NULL, | |
441 "real protection domain should be present"); | |
442 | |
12837 | 443 entry->add_protection_domain(this, protection_domain()); |
0 | 444 |
445 assert(entry->contains_protection_domain(protection_domain()), | |
446 "now protection domain should be present"); | |
447 } | |
448 | |
449 | |
450 bool Dictionary::is_valid_protection_domain(int index, unsigned int hash, | |
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451 Symbol* name, |
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452 ClassLoaderData* loader_data, |
0 | 453 Handle protection_domain) { |
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454 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
0 | 455 return entry->is_valid_protection_domain(protection_domain); |
456 } | |
457 | |
458 | |
459 void Dictionary::reorder_dictionary() { | |
460 | |
461 // Copy all the dictionary entries into a single master list. | |
462 | |
463 DictionaryEntry* master_list = NULL; | |
464 for (int i = 0; i < table_size(); ++i) { | |
465 DictionaryEntry* p = bucket(i); | |
466 while (p != NULL) { | |
467 DictionaryEntry* tmp; | |
468 tmp = p->next(); | |
469 p->set_next(master_list); | |
470 master_list = p; | |
471 p = tmp; | |
472 } | |
473 set_entry(i, NULL); | |
474 } | |
475 | |
476 // Add the dictionary entries back to the list in the correct buckets. | |
477 while (master_list != NULL) { | |
478 DictionaryEntry* p = master_list; | |
479 master_list = master_list->next(); | |
480 p->set_next(NULL); | |
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481 Symbol* class_name = InstanceKlass::cast((Klass*)(p->klass()))->name(); |
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482 // Since the null class loader data isn't copied to the CDS archive, |
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483 // compute the hash with NULL for loader data. |
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484 unsigned int hash = compute_hash(class_name, NULL); |
0 | 485 int index = hash_to_index(hash); |
486 p->set_hash(hash); | |
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487 p->set_loader_data(NULL); // loader_data isn't copied to CDS |
0 | 488 p->set_next(bucket(index)); |
489 set_entry(index, p); | |
490 } | |
491 } | |
492 | |
12837 | 493 ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
494 : Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) | |
495 { | |
496 } | |
497 | |
498 void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { | |
499 assert(SafepointSynchronize::is_at_safepoint(), "must be"); | |
500 for (int i = 0; i < table_size(); ++i) { | |
501 ProtectionDomainCacheEntry** p = bucket_addr(i); | |
502 ProtectionDomainCacheEntry* entry = bucket(i); | |
503 while (entry != NULL) { | |
504 if (is_alive->do_object_b(entry->literal())) { | |
505 p = entry->next_addr(); | |
506 } else { | |
507 *p = entry->next(); | |
508 free_entry(entry); | |
509 } | |
510 entry = *p; | |
511 } | |
512 } | |
513 } | |
514 | |
515 void ProtectionDomainCacheTable::oops_do(OopClosure* f) { | |
516 for (int index = 0; index < table_size(); index++) { | |
517 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
518 probe != NULL; | |
519 probe = probe->next()) { | |
520 probe->oops_do(f); | |
521 } | |
522 } | |
523 } | |
524 | |
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525 void ProtectionDomainCacheTable::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
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526 for (int index = 0; index < table_size(); index++) { |
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527 for (ProtectionDomainCacheEntry* probe = bucket(index); |
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528 probe != NULL; |
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529 probe = probe->next()) { |
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530 if (probe->is_strongly_reachable()) { |
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531 probe->reset_strongly_reachable(); |
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532 probe->oops_do(strong); |
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533 } else { |
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534 if (weak != NULL) { |
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535 probe->oops_do(weak); |
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536 } |
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537 } |
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538 } |
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539 } |
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540 } |
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541 |
12837 | 542 uint ProtectionDomainCacheTable::bucket_size() { |
543 return sizeof(ProtectionDomainCacheEntry); | |
544 } | |
545 | |
546 #ifndef PRODUCT | |
547 void ProtectionDomainCacheTable::print() { | |
548 tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", | |
549 table_size(), number_of_entries()); | |
550 for (int index = 0; index < table_size(); index++) { | |
551 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
552 probe != NULL; | |
553 probe = probe->next()) { | |
554 probe->print(); | |
555 } | |
556 } | |
557 } | |
558 | |
559 void ProtectionDomainCacheEntry::print() { | |
560 tty->print_cr("entry "PTR_FORMAT" value "PTR_FORMAT" strongly_reachable %d next "PTR_FORMAT, | |
12840 | 561 this, (void*)literal(), _strongly_reachable, next()); |
12837 | 562 } |
563 #endif | |
564 | |
565 void ProtectionDomainCacheTable::verify() { | |
566 int element_count = 0; | |
567 for (int index = 0; index < table_size(); index++) { | |
568 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
569 probe != NULL; | |
570 probe = probe->next()) { | |
571 probe->verify(); | |
572 element_count++; | |
573 } | |
574 } | |
575 guarantee(number_of_entries() == element_count, | |
576 "Verify of protection domain cache table failed"); | |
577 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
578 } | |
579 | |
580 void ProtectionDomainCacheEntry::verify() { | |
581 guarantee(literal()->is_oop(), "must be an oop"); | |
582 } | |
583 | |
584 void ProtectionDomainCacheTable::always_strong_oops_do(OopClosure* f) { | |
585 // the caller marked the protection domain cache entries that we need to apply | |
586 // the closure on. Only process them. | |
587 for (int index = 0; index < table_size(); index++) { | |
588 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
589 probe != NULL; | |
590 probe = probe->next()) { | |
591 if (probe->is_strongly_reachable()) { | |
592 probe->reset_strongly_reachable(); | |
593 probe->oops_do(f); | |
594 } | |
595 } | |
596 } | |
597 } | |
598 | |
599 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(oop protection_domain) { | |
600 unsigned int hash = compute_hash(protection_domain); | |
601 int index = hash_to_index(hash); | |
602 | |
603 ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); | |
604 if (entry == NULL) { | |
605 entry = add_entry(index, hash, protection_domain); | |
606 } | |
607 return entry; | |
608 } | |
609 | |
610 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, oop protection_domain) { | |
611 for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { | |
612 if (e->protection_domain() == protection_domain) { | |
613 return e; | |
614 } | |
615 } | |
616 | |
617 return NULL; | |
618 } | |
619 | |
620 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, oop protection_domain) { | |
621 assert_locked_or_safepoint(SystemDictionary_lock); | |
622 assert(index == index_for(protection_domain), "incorrect index?"); | |
623 assert(find_entry(index, protection_domain) == NULL, "no double entry"); | |
624 | |
625 ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); | |
626 Hashtable<oop, mtClass>::add_entry(index, p); | |
627 return p; | |
628 } | |
629 | |
630 void ProtectionDomainCacheTable::free(ProtectionDomainCacheEntry* to_delete) { | |
631 unsigned int hash = compute_hash(to_delete->protection_domain()); | |
632 int index = hash_to_index(hash); | |
633 | |
634 ProtectionDomainCacheEntry** p = bucket_addr(index); | |
635 ProtectionDomainCacheEntry* entry = bucket(index); | |
636 while (true) { | |
637 assert(entry != NULL, "sanity"); | |
638 | |
639 if (entry == to_delete) { | |
640 *p = entry->next(); | |
641 Hashtable<oop, mtClass>::free_entry(entry); | |
642 break; | |
643 } else { | |
644 p = entry->next_addr(); | |
645 entry = *p; | |
646 } | |
647 } | |
648 } | |
649 | |
710 | 650 SymbolPropertyTable::SymbolPropertyTable(int table_size) |
6197 | 651 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
710 | 652 { |
653 } | |
6197 | 654 SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
710 | 655 int number_of_entries) |
6197 | 656 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
710 | 657 { |
658 } | |
659 | |
660 | |
661 SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, | |
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662 Symbol* sym, |
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663 intptr_t sym_mode) { |
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664 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
710 | 665 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
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666 if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
710 | 667 return p; |
668 } | |
669 } | |
670 return NULL; | |
671 } | |
672 | |
673 | |
674 SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, | |
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675 Symbol* sym, intptr_t sym_mode) { |
710 | 676 assert_locked_or_safepoint(SystemDictionary_lock); |
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677 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
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678 assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
710 | 679 |
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680 SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
6197 | 681 Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
710 | 682 return p; |
683 } | |
684 | |
685 void SymbolPropertyTable::oops_do(OopClosure* f) { | |
686 for (int index = 0; index < table_size(); index++) { | |
687 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
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688 if (p->method_type() != NULL) { |
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689 f->do_oop(p->method_type_addr()); |
710 | 690 } |
691 } | |
692 } | |
693 } | |
694 | |
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695 void SymbolPropertyTable::methods_do(void f(Method*)) { |
710 | 696 for (int index = 0; index < table_size(); index++) { |
697 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
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698 Method* prop = p->method(); |
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699 if (prop != NULL) { |
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700 f((Method*)prop); |
710 | 701 } |
702 } | |
703 } | |
704 } | |
705 | |
0 | 706 |
707 // ---------------------------------------------------------------------------- | |
708 | |
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709 void Dictionary::print(bool details) { |
0 | 710 ResourceMark rm; |
711 HandleMark hm; | |
712 | |
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713 if (details) { |
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714 tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
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715 table_size(), number_of_entries()); |
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716 tty->print_cr("^ indicates that initiating loader is different from " |
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717 "defining loader"); |
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718 } |
0 | 719 |
720 for (int index = 0; index < table_size(); index++) { | |
721 for (DictionaryEntry* probe = bucket(index); | |
722 probe != NULL; | |
723 probe = probe->next()) { | |
724 if (Verbose) tty->print("%4d: ", index); | |
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725 Klass* e = probe->klass(); |
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726 ClassLoaderData* loader_data = probe->loader_data(); |
0 | 727 bool is_defining_class = |
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728 (loader_data == InstanceKlass::cast(e)->class_loader_data()); |
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729 tty->print("%s%s", ((!details) || is_defining_class) ? " " : "^", |
6983 | 730 e->external_name()); |
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731 |
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732 if (details) { |
0 | 733 tty->print(", loader "); |
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734 if (loader_data != NULL) { |
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735 loader_data->print_value(); |
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736 } else { |
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737 tty->print("NULL"); |
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738 } |
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739 } |
0 | 740 tty->cr(); |
741 } | |
742 } | |
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743 |
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744 if (details) { |
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745 tty->cr(); |
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746 _pd_cache_table->print(); |
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747 } |
12837 | 748 tty->cr(); |
0 | 749 } |
750 | |
751 void Dictionary::verify() { | |
752 guarantee(number_of_entries() >= 0, "Verify of system dictionary failed"); | |
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753 |
0 | 754 int element_count = 0; |
755 for (int index = 0; index < table_size(); index++) { | |
756 for (DictionaryEntry* probe = bucket(index); | |
757 probe != NULL; | |
758 probe = probe->next()) { | |
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759 Klass* e = probe->klass(); |
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760 ClassLoaderData* loader_data = probe->loader_data(); |
6983 | 761 guarantee(e->oop_is_instance(), |
0 | 762 "Verify of system dictionary failed"); |
763 // class loader must be present; a null class loader is the | |
764 // boostrap loader | |
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765 guarantee(loader_data != NULL || DumpSharedSpaces || |
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766 loader_data->class_loader() == NULL || |
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767 loader_data->class_loader()->is_instance(), |
0 | 768 "checking type of class_loader"); |
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769 e->verify(); |
0 | 770 probe->verify_protection_domain_set(); |
771 element_count++; | |
772 } | |
773 } | |
774 guarantee(number_of_entries() == element_count, | |
775 "Verify of system dictionary failed"); | |
776 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
12837 | 777 |
778 _pd_cache_table->verify(); | |
0 | 779 } |
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780 |