Mercurial > hg > truffle
annotate src/share/vm/classfile/dictionary.cpp @ 17937:78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas
8043164: Format warning in traceStream.hpp
Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings
Reviewed-by: kvn, coleenp, iveresov, twisti
| author | drchase |
|---|---|
| date | Thu, 22 May 2014 15:52:41 -0400 |
| parents | 85318d1fe8fe |
| children | 52b4284cb496 ce8f6bb717c9 |
| rev | line source |
|---|---|
| 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" | |
| 31 #include "utilities/hashtable.inline.hpp" | |
| 0 | 32 |
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33 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 0 | 34 |
| 35 DictionaryEntry* Dictionary::_current_class_entry = NULL; | |
| 36 int Dictionary::_current_class_index = 0; | |
| 37 | |
| 38 | |
| 39 Dictionary::Dictionary(int table_size) | |
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40 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry)) { |
| 0 | 41 _current_class_index = 0; |
| 42 _current_class_entry = NULL; | |
| 12837 | 43 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
| 0 | 44 }; |
| 45 | |
| 46 | |
| 6197 | 47 Dictionary::Dictionary(int table_size, HashtableBucket<mtClass>* t, |
| 0 | 48 int number_of_entries) |
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49 : TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry), t, number_of_entries) { |
| 0 | 50 _current_class_index = 0; |
| 51 _current_class_entry = NULL; | |
| 12837 | 52 _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
| 0 | 53 }; |
| 54 | |
| 12837 | 55 ProtectionDomainCacheEntry* Dictionary::cache_get(oop protection_domain) { |
| 56 return _pd_cache_table->get(protection_domain); | |
| 57 } | |
| 0 | 58 |
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59 DictionaryEntry* Dictionary::new_entry(unsigned int hash, Klass* klass, |
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60 ClassLoaderData* loader_data) { |
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61 DictionaryEntry* entry = (DictionaryEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass); |
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62 entry->set_loader_data(loader_data); |
| 0 | 63 entry->set_pd_set(NULL); |
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64 assert(klass->oop_is_instance(), "Must be"); |
| 0 | 65 return entry; |
| 66 } | |
| 67 | |
| 68 | |
| 69 void Dictionary::free_entry(DictionaryEntry* entry) { | |
| 70 // avoid recursion when deleting linked list | |
| 71 while (entry->pd_set() != NULL) { | |
| 72 ProtectionDomainEntry* to_delete = entry->pd_set(); | |
| 73 entry->set_pd_set(to_delete->next()); | |
| 74 delete to_delete; | |
| 75 } | |
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76 Hashtable<Klass*, mtClass>::free_entry(entry); |
| 0 | 77 } |
| 78 | |
| 79 | |
| 80 bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { | |
| 81 #ifdef ASSERT | |
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82 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
| 0 | 83 // Ensure this doesn't show up in the pd_set (invariant) |
| 84 bool in_pd_set = false; | |
| 85 for (ProtectionDomainEntry* current = _pd_set; | |
| 86 current != NULL; | |
| 87 current = current->next()) { | |
| 88 if (current->protection_domain() == protection_domain) { | |
| 89 in_pd_set = true; | |
| 90 break; | |
| 91 } | |
| 92 } | |
| 93 if (in_pd_set) { | |
| 94 assert(false, "A klass's protection domain should not show up " | |
| 95 "in its sys. dict. PD set"); | |
| 96 } | |
| 97 } | |
| 98 #endif /* ASSERT */ | |
| 99 | |
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100 if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
| 0 | 101 // Succeeds trivially |
| 102 return true; | |
| 103 } | |
| 104 | |
| 105 for (ProtectionDomainEntry* current = _pd_set; | |
| 106 current != NULL; | |
| 107 current = current->next()) { | |
| 108 if (current->protection_domain() == protection_domain) return true; | |
| 109 } | |
| 110 return false; | |
| 111 } | |
| 112 | |
| 113 | |
| 12837 | 114 void DictionaryEntry::add_protection_domain(Dictionary* dict, oop protection_domain) { |
| 0 | 115 assert_locked_or_safepoint(SystemDictionary_lock); |
| 116 if (!contains_protection_domain(protection_domain)) { | |
| 12837 | 117 ProtectionDomainCacheEntry* entry = dict->cache_get(protection_domain); |
| 0 | 118 ProtectionDomainEntry* new_head = |
| 12837 | 119 new ProtectionDomainEntry(entry, _pd_set); |
| 0 | 120 // Warning: Preserve store ordering. The SystemDictionary is read |
| 121 // without locks. The new ProtectionDomainEntry must be | |
| 122 // complete before other threads can be allowed to see it | |
| 123 // via a store to _pd_set. | |
| 124 OrderAccess::release_store_ptr(&_pd_set, new_head); | |
| 125 } | |
| 126 if (TraceProtectionDomainVerification && WizardMode) { | |
| 127 print(); | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 | |
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132 bool Dictionary::do_unloading() { |
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133 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
| 0 | 134 bool class_was_unloaded = false; |
| 135 int index = 0; // Defined here for portability! Do not move | |
| 136 | |
| 137 // Remove unloadable entries and classes from system dictionary | |
| 138 // The placeholder array has been handled in always_strong_oops_do. | |
| 139 DictionaryEntry* probe = NULL; | |
| 140 for (index = 0; index < table_size(); index++) { | |
| 141 for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { | |
| 142 probe = *p; | |
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143 Klass* e = probe->klass(); |
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144 ClassLoaderData* loader_data = probe->loader_data(); |
| 0 | 145 |
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146 InstanceKlass* ik = InstanceKlass::cast(e); |
| 0 | 147 |
| 148 // Non-unloadable classes were handled in always_strong_oops_do | |
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149 if (!is_strongly_reachable(loader_data, e)) { |
| 0 | 150 // Entry was not visited in phase1 (negated test from phase1) |
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151 assert(!loader_data->is_the_null_class_loader_data(), "unloading entry with null class loader"); |
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152 ClassLoaderData* k_def_class_loader_data = ik->class_loader_data(); |
| 0 | 153 |
| 154 // Do we need to delete this system dictionary entry? | |
| 155 bool purge_entry = false; | |
| 156 | |
| 157 // Do we need to delete this system dictionary entry? | |
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158 if (loader_data->is_unloading()) { |
| 0 | 159 // If the loader is not live this entry should always be |
| 160 // removed (will never be looked up again). Note that this is | |
| 161 // not the same as unloading the referred class. | |
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162 if (k_def_class_loader_data == loader_data) { |
| 0 | 163 // This is the defining entry, so the referred class is about |
| 164 // to be unloaded. | |
| 165 class_was_unloaded = true; | |
| 166 } | |
| 167 // Also remove this system dictionary entry. | |
| 168 purge_entry = true; | |
| 169 | |
| 170 } else { | |
| 171 // The loader in this entry is alive. If the klass is dead, | |
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172 // (determined by checking the defining class loader) |
| 0 | 173 // the loader must be an initiating loader (rather than the |
| 174 // defining loader). Remove this entry. | |
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175 if (k_def_class_loader_data->is_unloading()) { |
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176 // If we get here, the class_loader_data must not be the defining |
| 0 | 177 // loader, it must be an initiating one. |
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178 assert(k_def_class_loader_data != loader_data, |
| 0 | 179 "cannot have live defining loader and unreachable klass"); |
| 180 // Loader is live, but class and its defining loader are dead. | |
| 181 // Remove the entry. The class is going away. | |
| 182 purge_entry = true; | |
| 183 } | |
| 184 } | |
| 185 | |
| 186 if (purge_entry) { | |
| 187 *p = probe->next(); | |
| 188 if (probe == _current_class_entry) { | |
| 189 _current_class_entry = NULL; | |
| 190 } | |
| 191 free_entry(probe); | |
| 192 continue; | |
| 193 } | |
| 194 } | |
| 195 p = probe->next_addr(); | |
| 196 } | |
| 197 } | |
| 198 return class_was_unloaded; | |
| 199 } | |
| 200 | |
| 201 | |
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202 void Dictionary::always_strong_oops_do(OopClosure* blk) { |
| 12837 | 203 // Follow all system classes and temporary placeholders in dictionary; only |
| 204 // protection domain oops contain references into the heap. In a first | |
| 205 // pass over the system dictionary determine which need to be treated as | |
| 206 // strongly reachable and mark them as such. | |
| 0 | 207 for (int index = 0; index < table_size(); index++) { |
| 208 for (DictionaryEntry *probe = bucket(index); | |
| 209 probe != NULL; | |
| 210 probe = probe->next()) { | |
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211 Klass* e = probe->klass(); |
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212 ClassLoaderData* loader_data = probe->loader_data(); |
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213 if (is_strongly_reachable(loader_data, e)) { |
| 12837 | 214 probe->set_strongly_reachable(); |
| 0 | 215 } |
| 216 } | |
| 217 } | |
| 12837 | 218 // Then iterate over the protection domain cache to apply the closure on the |
| 219 // previously marked ones. | |
| 220 _pd_cache_table->always_strong_oops_do(blk); | |
| 0 | 221 } |
| 222 | |
| 223 | |
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224 void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
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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()) { | |
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230 Klass* e = probe->klass(); |
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231 ClassLoaderData* loader_data = probe->loader_data(); |
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232 if (is_strongly_reachable(loader_data, e)) { |
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233 closure->do_klass(e); |
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234 } |
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235 } |
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236 } |
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237 } |
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238 |
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239 |
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240 // Just the classes from defining class loaders |
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241 void Dictionary::classes_do(void f(Klass*)) { |
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242 for (int index = 0; index < table_size(); index++) { |
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243 for (DictionaryEntry* probe = bucket(index); |
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244 probe != NULL; |
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245 probe = probe->next()) { |
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246 Klass* k = probe->klass(); |
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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 | |
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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()) { | |
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261 Klass* k = probe->klass(); |
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262 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
| 0 | 263 f(k, CHECK); |
| 264 } | |
| 265 } | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 // All classes, and their class loaders | |
| 270 // Don't iterate over placeholders | |
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271 void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
| 0 | 272 for (int index = 0; index < table_size(); index++) { |
| 273 for (DictionaryEntry* probe = bucket(index); | |
| 274 probe != NULL; | |
| 275 probe = probe->next()) { | |
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276 Klass* k = probe->klass(); |
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277 f(k, probe->loader_data()); |
| 0 | 278 } |
| 279 } | |
| 280 } | |
| 281 | |
| 282 void Dictionary::oops_do(OopClosure* f) { | |
| 12837 | 283 // Only the protection domain oops contain references into the heap. Iterate |
| 284 // over all of them. | |
| 285 _pd_cache_table->oops_do(f); | |
| 0 | 286 } |
| 287 | |
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288 void Dictionary::methods_do(void f(Method*)) { |
| 0 | 289 for (int index = 0; index < table_size(); index++) { |
| 290 for (DictionaryEntry* probe = bucket(index); | |
| 291 probe != NULL; | |
| 292 probe = probe->next()) { | |
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293 Klass* k = probe->klass(); |
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294 if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
| 0 | 295 // only take klass is we have the entry with the defining class loader |
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296 InstanceKlass::cast(k)->methods_do(f); |
| 0 | 297 } |
| 298 } | |
| 299 } | |
| 300 } | |
| 301 | |
| 12837 | 302 void Dictionary::unlink(BoolObjectClosure* is_alive) { |
| 303 // Only the protection domain cache table may contain references to the heap | |
| 304 // that need to be unlinked. | |
| 305 _pd_cache_table->unlink(is_alive); | |
| 306 } | |
| 0 | 307 |
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308 Klass* Dictionary::try_get_next_class() { |
| 0 | 309 while (true) { |
| 310 if (_current_class_entry != NULL) { | |
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311 Klass* k = _current_class_entry->klass(); |
| 0 | 312 _current_class_entry = _current_class_entry->next(); |
| 313 return k; | |
| 314 } | |
| 315 _current_class_index = (_current_class_index + 1) % table_size(); | |
| 316 _current_class_entry = bucket(_current_class_index); | |
| 317 } | |
| 318 // never reached | |
| 319 } | |
| 320 | |
| 321 // Add a loaded class to the system dictionary. | |
| 322 // Readers of the SystemDictionary aren't always locked, so _buckets | |
| 323 // is volatile. The store of the next field in the constructor is | |
| 324 // also cast to volatile; we do this to ensure store order is maintained | |
| 325 // by the compilers. | |
| 326 | |
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327 void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
| 0 | 328 KlassHandle obj) { |
| 329 assert_locked_or_safepoint(SystemDictionary_lock); | |
| 330 assert(obj() != NULL, "adding NULL obj"); | |
| 6983 | 331 assert(obj()->name() == class_name, "sanity check on name"); |
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332 assert(loader_data != NULL, "Must be non-NULL"); |
| 0 | 333 |
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334 unsigned int hash = compute_hash(class_name, loader_data); |
| 0 | 335 int index = hash_to_index(hash); |
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336 DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
| 0 | 337 add_entry(index, entry); |
| 338 } | |
| 339 | |
| 340 | |
| 341 // This routine does not lock the system dictionary. | |
| 342 // | |
| 343 // Since readers don't hold a lock, we must make sure that system | |
| 344 // dictionary entries are only removed at a safepoint (when only one | |
| 345 // thread is running), and are added to in a safe way (all links must | |
| 346 // be updated in an MT-safe manner). | |
| 347 // | |
| 348 // Callers should be aware that an entry could be added just after | |
| 349 // _buckets[index] is read here, so the caller will not see the new entry. | |
| 350 DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, | |
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351 Symbol* class_name, |
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352 ClassLoaderData* loader_data) { |
| 0 | 353 debug_only(_lookup_count++); |
| 354 for (DictionaryEntry* entry = bucket(index); | |
| 355 entry != NULL; | |
| 356 entry = entry->next()) { | |
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357 if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
| 0 | 358 return entry; |
| 359 } | |
| 360 debug_only(_lookup_length++); | |
| 361 } | |
| 362 return NULL; | |
| 363 } | |
| 364 | |
| 365 | |
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366 Klass* Dictionary::find(int index, unsigned int hash, Symbol* name, |
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367 ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
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368 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
| 0 | 369 if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
| 370 return entry->klass(); | |
| 371 } else { | |
| 372 return NULL; | |
| 373 } | |
| 374 } | |
| 375 | |
| 376 | |
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377 Klass* Dictionary::find_class(int index, unsigned int hash, |
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378 Symbol* name, ClassLoaderData* loader_data) { |
| 0 | 379 assert_locked_or_safepoint(SystemDictionary_lock); |
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380 assert (index == index_for(name, loader_data), "incorrect index?"); |
| 0 | 381 |
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382 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
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383 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
| 0 | 384 } |
| 385 | |
| 386 | |
| 387 // Variant of find_class for shared classes. No locking required, as | |
| 388 // that table is static. | |
| 389 | |
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390 Klass* Dictionary::find_shared_class(int index, unsigned int hash, |
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391 Symbol* name) { |
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392 assert (index == index_for(name, NULL), "incorrect index?"); |
| 0 | 393 |
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394 DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
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395 return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
| 0 | 396 } |
| 397 | |
| 398 | |
| 399 void Dictionary::add_protection_domain(int index, unsigned int hash, | |
| 400 instanceKlassHandle klass, | |
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401 ClassLoaderData* loader_data, Handle protection_domain, |
| 0 | 402 TRAPS) { |
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403 Symbol* klass_name = klass->name(); |
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404 DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
| 0 | 405 |
| 406 assert(entry != NULL,"entry must be present, we just created it"); | |
| 407 assert(protection_domain() != NULL, | |
| 408 "real protection domain should be present"); | |
| 409 | |
| 12837 | 410 entry->add_protection_domain(this, protection_domain()); |
| 0 | 411 |
| 412 assert(entry->contains_protection_domain(protection_domain()), | |
| 413 "now protection domain should be present"); | |
| 414 } | |
| 415 | |
| 416 | |
| 417 bool Dictionary::is_valid_protection_domain(int index, unsigned int hash, | |
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418 Symbol* name, |
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419 ClassLoaderData* loader_data, |
| 0 | 420 Handle protection_domain) { |
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421 DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
| 0 | 422 return entry->is_valid_protection_domain(protection_domain); |
| 423 } | |
| 424 | |
| 425 | |
| 426 void Dictionary::reorder_dictionary() { | |
| 427 | |
| 428 // Copy all the dictionary entries into a single master list. | |
| 429 | |
| 430 DictionaryEntry* master_list = NULL; | |
| 431 for (int i = 0; i < table_size(); ++i) { | |
| 432 DictionaryEntry* p = bucket(i); | |
| 433 while (p != NULL) { | |
| 434 DictionaryEntry* tmp; | |
| 435 tmp = p->next(); | |
| 436 p->set_next(master_list); | |
| 437 master_list = p; | |
| 438 p = tmp; | |
| 439 } | |
| 440 set_entry(i, NULL); | |
| 441 } | |
| 442 | |
| 443 // Add the dictionary entries back to the list in the correct buckets. | |
| 444 while (master_list != NULL) { | |
| 445 DictionaryEntry* p = master_list; | |
| 446 master_list = master_list->next(); | |
| 447 p->set_next(NULL); | |
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448 Symbol* class_name = InstanceKlass::cast((Klass*)(p->klass()))->name(); |
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449 // Since the null class loader data isn't copied to the CDS archive, |
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450 // compute the hash with NULL for loader data. |
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451 unsigned int hash = compute_hash(class_name, NULL); |
| 0 | 452 int index = hash_to_index(hash); |
| 453 p->set_hash(hash); | |
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454 p->set_loader_data(NULL); // loader_data isn't copied to CDS |
| 0 | 455 p->set_next(bucket(index)); |
| 456 set_entry(index, p); | |
| 457 } | |
| 458 } | |
| 459 | |
| 12837 | 460 ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
| 461 : Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) | |
| 462 { | |
| 463 } | |
| 464 | |
| 465 void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { | |
| 466 assert(SafepointSynchronize::is_at_safepoint(), "must be"); | |
| 467 for (int i = 0; i < table_size(); ++i) { | |
| 468 ProtectionDomainCacheEntry** p = bucket_addr(i); | |
| 469 ProtectionDomainCacheEntry* entry = bucket(i); | |
| 470 while (entry != NULL) { | |
| 471 if (is_alive->do_object_b(entry->literal())) { | |
| 472 p = entry->next_addr(); | |
| 473 } else { | |
| 474 *p = entry->next(); | |
| 475 free_entry(entry); | |
| 476 } | |
| 477 entry = *p; | |
| 478 } | |
| 479 } | |
| 480 } | |
| 481 | |
| 482 void ProtectionDomainCacheTable::oops_do(OopClosure* f) { | |
| 483 for (int index = 0; index < table_size(); index++) { | |
| 484 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
| 485 probe != NULL; | |
| 486 probe = probe->next()) { | |
| 487 probe->oops_do(f); | |
| 488 } | |
| 489 } | |
| 490 } | |
| 491 | |
| 492 uint ProtectionDomainCacheTable::bucket_size() { | |
| 493 return sizeof(ProtectionDomainCacheEntry); | |
| 494 } | |
| 495 | |
| 496 #ifndef PRODUCT | |
| 497 void ProtectionDomainCacheTable::print() { | |
| 498 tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", | |
| 499 table_size(), number_of_entries()); | |
| 500 for (int index = 0; index < table_size(); index++) { | |
| 501 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
| 502 probe != NULL; | |
| 503 probe = probe->next()) { | |
| 504 probe->print(); | |
| 505 } | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 void ProtectionDomainCacheEntry::print() { | |
| 510 tty->print_cr("entry "PTR_FORMAT" value "PTR_FORMAT" strongly_reachable %d next "PTR_FORMAT, | |
| 12840 | 511 this, (void*)literal(), _strongly_reachable, next()); |
| 12837 | 512 } |
| 513 #endif | |
| 514 | |
| 515 void ProtectionDomainCacheTable::verify() { | |
| 516 int element_count = 0; | |
| 517 for (int index = 0; index < table_size(); index++) { | |
| 518 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
| 519 probe != NULL; | |
| 520 probe = probe->next()) { | |
| 521 probe->verify(); | |
| 522 element_count++; | |
| 523 } | |
| 524 } | |
| 525 guarantee(number_of_entries() == element_count, | |
| 526 "Verify of protection domain cache table failed"); | |
| 527 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
| 528 } | |
| 529 | |
| 530 void ProtectionDomainCacheEntry::verify() { | |
| 531 guarantee(literal()->is_oop(), "must be an oop"); | |
| 532 } | |
| 533 | |
| 534 void ProtectionDomainCacheTable::always_strong_oops_do(OopClosure* f) { | |
| 535 // the caller marked the protection domain cache entries that we need to apply | |
| 536 // the closure on. Only process them. | |
| 537 for (int index = 0; index < table_size(); index++) { | |
| 538 for (ProtectionDomainCacheEntry* probe = bucket(index); | |
| 539 probe != NULL; | |
| 540 probe = probe->next()) { | |
| 541 if (probe->is_strongly_reachable()) { | |
| 542 probe->reset_strongly_reachable(); | |
| 543 probe->oops_do(f); | |
| 544 } | |
| 545 } | |
| 546 } | |
| 547 } | |
| 548 | |
| 549 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(oop protection_domain) { | |
| 550 unsigned int hash = compute_hash(protection_domain); | |
| 551 int index = hash_to_index(hash); | |
| 552 | |
| 553 ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); | |
| 554 if (entry == NULL) { | |
| 555 entry = add_entry(index, hash, protection_domain); | |
| 556 } | |
| 557 return entry; | |
| 558 } | |
| 559 | |
| 560 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, oop protection_domain) { | |
| 561 for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { | |
| 562 if (e->protection_domain() == protection_domain) { | |
| 563 return e; | |
| 564 } | |
| 565 } | |
| 566 | |
| 567 return NULL; | |
| 568 } | |
| 569 | |
| 570 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, oop protection_domain) { | |
| 571 assert_locked_or_safepoint(SystemDictionary_lock); | |
| 572 assert(index == index_for(protection_domain), "incorrect index?"); | |
| 573 assert(find_entry(index, protection_domain) == NULL, "no double entry"); | |
| 574 | |
| 575 ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); | |
| 576 Hashtable<oop, mtClass>::add_entry(index, p); | |
| 577 return p; | |
| 578 } | |
| 579 | |
| 580 void ProtectionDomainCacheTable::free(ProtectionDomainCacheEntry* to_delete) { | |
| 581 unsigned int hash = compute_hash(to_delete->protection_domain()); | |
| 582 int index = hash_to_index(hash); | |
| 583 | |
| 584 ProtectionDomainCacheEntry** p = bucket_addr(index); | |
| 585 ProtectionDomainCacheEntry* entry = bucket(index); | |
| 586 while (true) { | |
| 587 assert(entry != NULL, "sanity"); | |
| 588 | |
| 589 if (entry == to_delete) { | |
| 590 *p = entry->next(); | |
| 591 Hashtable<oop, mtClass>::free_entry(entry); | |
| 592 break; | |
| 593 } else { | |
| 594 p = entry->next_addr(); | |
| 595 entry = *p; | |
| 596 } | |
| 597 } | |
| 598 } | |
| 599 | |
| 710 | 600 SymbolPropertyTable::SymbolPropertyTable(int table_size) |
| 6197 | 601 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
| 710 | 602 { |
| 603 } | |
| 6197 | 604 SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
| 710 | 605 int number_of_entries) |
| 6197 | 606 : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
| 710 | 607 { |
| 608 } | |
| 609 | |
| 610 | |
| 611 SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, | |
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612 Symbol* sym, |
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613 intptr_t sym_mode) { |
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614 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
| 710 | 615 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
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616 if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
| 710 | 617 return p; |
| 618 } | |
| 619 } | |
| 620 return NULL; | |
| 621 } | |
| 622 | |
| 623 | |
| 624 SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, | |
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625 Symbol* sym, intptr_t sym_mode) { |
| 710 | 626 assert_locked_or_safepoint(SystemDictionary_lock); |
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627 assert(index == index_for(sym, sym_mode), "incorrect index?"); |
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628 assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
| 710 | 629 |
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630 SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
| 6197 | 631 Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
| 710 | 632 return p; |
| 633 } | |
| 634 | |
| 635 void SymbolPropertyTable::oops_do(OopClosure* f) { | |
| 636 for (int index = 0; index < table_size(); index++) { | |
| 637 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
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638 if (p->method_type() != NULL) { |
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639 f->do_oop(p->method_type_addr()); |
| 710 | 640 } |
| 641 } | |
| 642 } | |
| 643 } | |
| 644 | |
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645 void SymbolPropertyTable::methods_do(void f(Method*)) { |
| 710 | 646 for (int index = 0; index < table_size(); index++) { |
| 647 for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { | |
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648 Method* prop = p->method(); |
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649 if (prop != NULL) { |
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650 f((Method*)prop); |
| 710 | 651 } |
| 652 } | |
| 653 } | |
| 654 } | |
| 655 | |
| 0 | 656 |
| 657 // ---------------------------------------------------------------------------- | |
| 658 #ifndef PRODUCT | |
| 659 | |
| 660 void Dictionary::print() { | |
| 661 ResourceMark rm; | |
| 662 HandleMark hm; | |
| 663 | |
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664 tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
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665 table_size(), number_of_entries()); |
| 0 | 666 tty->print_cr("^ indicates that initiating loader is different from " |
| 667 "defining loader"); | |
| 668 | |
| 669 for (int index = 0; index < table_size(); index++) { | |
| 670 for (DictionaryEntry* probe = bucket(index); | |
| 671 probe != NULL; | |
| 672 probe = probe->next()) { | |
| 673 if (Verbose) tty->print("%4d: ", index); | |
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674 Klass* e = probe->klass(); |
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675 ClassLoaderData* loader_data = probe->loader_data(); |
| 0 | 676 bool is_defining_class = |
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677 (loader_data == InstanceKlass::cast(e)->class_loader_data()); |
| 0 | 678 tty->print("%s%s", is_defining_class ? " " : "^", |
| 6983 | 679 e->external_name()); |
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680 |
| 0 | 681 tty->print(", loader "); |
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682 loader_data->print_value(); |
| 0 | 683 tty->cr(); |
| 684 } | |
| 685 } | |
| 12837 | 686 tty->cr(); |
| 687 _pd_cache_table->print(); | |
| 688 tty->cr(); | |
| 0 | 689 } |
| 690 | |
| 691 #endif | |
| 692 | |
| 693 void Dictionary::verify() { | |
| 694 guarantee(number_of_entries() >= 0, "Verify of system dictionary failed"); | |
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695 |
| 0 | 696 int element_count = 0; |
| 697 for (int index = 0; index < table_size(); index++) { | |
| 698 for (DictionaryEntry* probe = bucket(index); | |
| 699 probe != NULL; | |
| 700 probe = probe->next()) { | |
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701 Klass* e = probe->klass(); |
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702 ClassLoaderData* loader_data = probe->loader_data(); |
| 6983 | 703 guarantee(e->oop_is_instance(), |
| 0 | 704 "Verify of system dictionary failed"); |
| 705 // class loader must be present; a null class loader is the | |
| 706 // boostrap loader | |
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707 guarantee(loader_data != NULL || DumpSharedSpaces || |
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708 loader_data->class_loader() == NULL || |
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709 loader_data->class_loader()->is_instance(), |
| 0 | 710 "checking type of class_loader"); |
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711 e->verify(); |
| 0 | 712 probe->verify_protection_domain_set(); |
| 713 element_count++; | |
| 714 } | |
| 715 } | |
| 716 guarantee(number_of_entries() == element_count, | |
| 717 "Verify of system dictionary failed"); | |
| 718 debug_only(verify_lookup_length((double)number_of_entries() / table_size())); | |
| 12837 | 719 |
| 720 _pd_cache_table->verify(); | |
| 0 | 721 } |
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722 |