| File: | jdk/src/hotspot/share/classfile/dictionary.cpp |
| Warning: | line 449, column 14 Value stored to 'e' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "classfile/classLoaderData.inline.hpp" |
| 27 | #include "classfile/dictionary.hpp" |
| 28 | #include "classfile/javaClasses.hpp" |
| 29 | #include "classfile/protectionDomainCache.hpp" |
| 30 | #include "classfile/systemDictionary.hpp" |
| 31 | #include "classfile/vmSymbols.hpp" |
| 32 | #include "logging/log.hpp" |
| 33 | #include "logging/logStream.hpp" |
| 34 | #include "memory/iterator.hpp" |
| 35 | #include "memory/metaspaceClosure.hpp" |
| 36 | #include "memory/resourceArea.hpp" |
| 37 | #include "memory/universe.hpp" |
| 38 | #include "oops/klass.inline.hpp" |
| 39 | #include "oops/method.hpp" |
| 40 | #include "oops/oop.inline.hpp" |
| 41 | #include "oops/oopHandle.inline.hpp" |
| 42 | #include "runtime/arguments.hpp" |
| 43 | #include "runtime/handles.inline.hpp" |
| 44 | #include "runtime/javaCalls.hpp" |
| 45 | #include "runtime/mutexLocker.hpp" |
| 46 | #include "runtime/safepointVerifiers.hpp" |
| 47 | #include "utilities/growableArray.hpp" |
| 48 | #include "utilities/hashtable.inline.hpp" |
| 49 | |
| 50 | // Optimization: if any dictionary needs resizing, we set this flag, |
| 51 | // so that we dont't have to walk all dictionaries to check if any actually |
| 52 | // needs resizing, which is costly to do at Safepoint. |
| 53 | bool Dictionary::_some_dictionary_needs_resizing = false; |
| 54 | |
| 55 | Dictionary::Dictionary(ClassLoaderData* loader_data, int table_size, bool resizable) |
| 56 | : Hashtable<InstanceKlass*, mtClass>(table_size, (int)sizeof(DictionaryEntry)), |
| 57 | _resizable(resizable), _needs_resizing(false), _loader_data(loader_data) { |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | Dictionary::Dictionary(ClassLoaderData* loader_data, |
| 62 | int table_size, HashtableBucket<mtClass>* t, |
| 63 | int number_of_entries, bool resizable) |
| 64 | : Hashtable<InstanceKlass*, mtClass>(table_size, (int)sizeof(DictionaryEntry), t, number_of_entries), |
| 65 | _resizable(resizable), _needs_resizing(false), _loader_data(loader_data) { |
| 66 | }; |
| 67 | |
| 68 | Dictionary::~Dictionary() { |
| 69 | DictionaryEntry* probe = NULL__null; |
| 70 | for (int index = 0; index < table_size(); index++) { |
| 71 | for (DictionaryEntry** p = bucket_addr(index); *p != NULL__null; ) { |
| 72 | probe = *p; |
| 73 | *p = probe->next(); |
| 74 | free_entry(probe); |
| 75 | } |
| 76 | } |
| 77 | assert(number_of_entries() == 0, "should have removed all entries")do { if (!(number_of_entries() == 0)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 77, "assert(" "number_of_entries() == 0" ") failed", "should have removed all entries" ); ::breakpoint(); } } while (0); |
| 78 | } |
| 79 | |
| 80 | DictionaryEntry* Dictionary::new_entry(unsigned int hash, InstanceKlass* klass) { |
| 81 | DictionaryEntry* entry = (DictionaryEntry*)Hashtable<InstanceKlass*, mtClass>::new_entry(hash, klass); |
| 82 | entry->release_set_pd_set(NULL__null); |
| 83 | assert(klass->is_instance_klass(), "Must be")do { if (!(klass->is_instance_klass())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 83, "assert(" "klass->is_instance_klass()" ") failed", "Must be" ); ::breakpoint(); } } while (0); |
| 84 | return entry; |
| 85 | } |
| 86 | |
| 87 | void Dictionary::free_entry(DictionaryEntry* entry) { |
| 88 | // avoid recursion when deleting linked list |
| 89 | // pd_set is accessed during a safepoint. |
| 90 | // This doesn't require a lock because nothing is reading this |
| 91 | // entry anymore. The ClassLoader is dead. |
| 92 | while (entry->pd_set_acquire() != NULL__null) { |
| 93 | ProtectionDomainEntry* to_delete = entry->pd_set_acquire(); |
| 94 | entry->release_set_pd_set(to_delete->next_acquire()); |
| 95 | delete to_delete; |
| 96 | } |
| 97 | BasicHashtable<mtClass>::free_entry(entry); |
| 98 | } |
| 99 | |
| 100 | const int _resize_load_trigger = 5; // load factor that will trigger the resize |
| 101 | |
| 102 | bool Dictionary::does_any_dictionary_needs_resizing() { |
| 103 | return Dictionary::_some_dictionary_needs_resizing; |
| 104 | } |
| 105 | |
| 106 | void Dictionary::check_if_needs_resize() { |
| 107 | if (_resizable == true) { |
| 108 | if (number_of_entries() > (_resize_load_trigger*table_size())) { |
| 109 | _needs_resizing = true; |
| 110 | Dictionary::_some_dictionary_needs_resizing = true; |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | bool Dictionary::resize_if_needed() { |
| 116 | assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint")do { if (!(SafepointSynchronize::is_at_safepoint())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 116, "assert(" "SafepointSynchronize::is_at_safepoint()" ") failed" , "must be at safepoint"); ::breakpoint(); } } while (0); |
| 117 | int desired_size = 0; |
| 118 | if (_needs_resizing == true) { |
| 119 | desired_size = calculate_resize(false); |
| 120 | assert(desired_size != 0, "bug in calculate_resize")do { if (!(desired_size != 0)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 120, "assert(" "desired_size != 0" ") failed", "bug in calculate_resize" ); ::breakpoint(); } } while (0); |
| 121 | if (desired_size == table_size()) { |
| 122 | _resizable = false; // hit max |
| 123 | } else { |
| 124 | if (!resize(desired_size)) { |
| 125 | // Something went wrong, turn resizing off |
| 126 | _resizable = false; |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | _needs_resizing = false; |
| 132 | Dictionary::_some_dictionary_needs_resizing = false; |
| 133 | |
| 134 | return (desired_size != 0); |
| 135 | } |
| 136 | |
| 137 | bool DictionaryEntry::is_valid_protection_domain(Handle protection_domain) { |
| 138 | |
| 139 | return protection_domain() == NULL__null || !java_lang_System::allow_security_manager() |
| 140 | ? true |
| 141 | : contains_protection_domain(protection_domain()); |
| 142 | } |
| 143 | |
| 144 | // Reading the pd_set on each DictionaryEntry is lock free and cannot safepoint. |
| 145 | // Adding and deleting entries is under the SystemDictionary_lock |
| 146 | // Deleting unloaded entries on ClassLoaderData for dictionaries that are not unloaded |
| 147 | // is a three step process: |
| 148 | // moving the entries to a separate list, handshake to wait for |
| 149 | // readers to complete (see NSV here), and then actually deleting the entries. |
| 150 | // Deleting entries is done by the ServiceThread when triggered by class unloading. |
| 151 | |
| 152 | bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { |
| 153 | assert(Thread::current()->is_Java_thread() || SafepointSynchronize::is_at_safepoint(),do { if (!(Thread::current()->is_Java_thread() || SafepointSynchronize ::is_at_safepoint())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 154, "assert(" "Thread::current()->is_Java_thread() || SafepointSynchronize::is_at_safepoint()" ") failed", "can only be called by a JavaThread or at safepoint" ); ::breakpoint(); } } while (0) |
| 154 | "can only be called by a JavaThread or at safepoint")do { if (!(Thread::current()->is_Java_thread() || SafepointSynchronize ::is_at_safepoint())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 154, "assert(" "Thread::current()->is_Java_thread() || SafepointSynchronize::is_at_safepoint()" ") failed", "can only be called by a JavaThread or at safepoint" ); ::breakpoint(); } } while (0); |
| 155 | // This cannot safepoint while reading the protection domain set. |
| 156 | NoSafepointVerifier nsv; |
| 157 | #ifdef ASSERT1 |
| 158 | if (protection_domain == instance_klass()->protection_domain()) { |
| 159 | // Ensure this doesn't show up in the pd_set (invariant) |
| 160 | bool in_pd_set = false; |
| 161 | for (ProtectionDomainEntry* current = pd_set_acquire(); |
| 162 | current != NULL__null; |
| 163 | current = current->next_acquire()) { |
| 164 | if (current->object_no_keepalive() == protection_domain) { |
| 165 | in_pd_set = true; |
| 166 | break; |
| 167 | } |
| 168 | } |
| 169 | if (in_pd_set) { |
| 170 | assert(false, "A klass's protection domain should not show up "do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 171, "assert(" "false" ") failed", "A klass's protection domain should not show up " "in its sys. dict. PD set"); ::breakpoint(); } } while (0) |
| 171 | "in its sys. dict. PD set")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 171, "assert(" "false" ") failed", "A klass's protection domain should not show up " "in its sys. dict. PD set"); ::breakpoint(); } } while (0); |
| 172 | } |
| 173 | } |
| 174 | #endif /* ASSERT */ |
| 175 | |
| 176 | if (protection_domain == instance_klass()->protection_domain()) { |
| 177 | // Succeeds trivially |
| 178 | return true; |
| 179 | } |
| 180 | |
| 181 | for (ProtectionDomainEntry* current = pd_set_acquire(); |
| 182 | current != NULL__null; |
| 183 | current = current->next_acquire()) { |
| 184 | if (current->object_no_keepalive() == protection_domain) { |
| 185 | return true; |
| 186 | } |
| 187 | } |
| 188 | return false; |
| 189 | } |
| 190 | |
| 191 | void DictionaryEntry::add_protection_domain(ClassLoaderData* loader_data, Handle protection_domain) { |
| 192 | assert_lock_strong(SystemDictionary_lock); |
| 193 | if (!contains_protection_domain(protection_domain())) { |
| 194 | ProtectionDomainCacheEntry* entry = SystemDictionary::pd_cache_table()->get(protection_domain); |
| 195 | // Additions and deletions hold the SystemDictionary_lock, readers are lock-free |
| 196 | ProtectionDomainEntry* new_head = new ProtectionDomainEntry(entry, _pd_set); |
| 197 | release_set_pd_set(new_head); |
| 198 | } |
| 199 | LogTarget(Trace, protectiondomain)LogTargetImpl<LogLevel::Trace, (LogTag::_protectiondomain) , (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG)> lt; |
| 200 | if (lt.is_enabled()) { |
| 201 | ResourceMark rm; |
| 202 | LogStream ls(lt); |
| 203 | ls.print("adding protection domain for class %s", instance_klass()->name()->as_C_string()); |
| 204 | ls.print(" class loader: "); |
| 205 | loader_data->class_loader()->print_value_on(&ls); |
| 206 | ls.print(" protection domain: "); |
| 207 | protection_domain->print_value_on(&ls); |
| 208 | ls.print(" "); |
| 209 | print_count(&ls); |
| 210 | ls.cr(); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | // Just the classes from defining class loaders |
| 215 | void Dictionary::classes_do(void f(InstanceKlass*)) { |
| 216 | for (int index = 0; index < table_size(); index++) { |
| 217 | for (DictionaryEntry* probe = bucket(index); |
| 218 | probe != NULL__null; |
| 219 | probe = probe->next()) { |
| 220 | InstanceKlass* k = probe->instance_klass(); |
| 221 | if (loader_data() == k->class_loader_data()) { |
| 222 | f(k); |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | // Added for initialize_itable_for_klass to handle exceptions |
| 229 | // Just the classes from defining class loaders |
| 230 | void Dictionary::classes_do(void f(InstanceKlass*, TRAPSJavaThread* __the_thread__), TRAPSJavaThread* __the_thread__) { |
| 231 | for (int index = 0; index < table_size(); index++) { |
| 232 | for (DictionaryEntry* probe = bucket(index); |
| 233 | probe != NULL__null; |
| 234 | probe = probe->next()) { |
| 235 | InstanceKlass* k = probe->instance_klass(); |
| 236 | if (loader_data() == k->class_loader_data()) { |
| 237 | f(k, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | // All classes, and their class loaders, including initiating class loaders |
| 244 | void Dictionary::all_entries_do(KlassClosure* closure) { |
| 245 | for (int index = 0; index < table_size(); index++) { |
| 246 | for (DictionaryEntry* probe = bucket(index); |
| 247 | probe != NULL__null; |
| 248 | probe = probe->next()) { |
| 249 | InstanceKlass* k = probe->instance_klass(); |
| 250 | closure->do_klass(k); |
| 251 | } |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | // Used to scan and relocate the classes during CDS archive dump. |
| 256 | void Dictionary::classes_do(MetaspaceClosure* it) { |
| 257 | Arguments::assert_is_dumping_archive(); |
| 258 | for (int index = 0; index < table_size(); index++) { |
| 259 | for (DictionaryEntry* probe = bucket(index); |
| 260 | probe != NULL__null; |
| 261 | probe = probe->next()) { |
| 262 | it->push(probe->klass_addr()); |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | |
| 268 | |
| 269 | // Add a loaded class to the dictionary. |
| 270 | // Readers of the SystemDictionary aren't always locked, so _buckets |
| 271 | // is volatile. The store of the next field in the constructor is |
| 272 | // also cast to volatile; we do this to ensure store order is maintained |
| 273 | // by the compilers. |
| 274 | |
| 275 | void Dictionary::add_klass(unsigned int hash, Symbol* class_name, |
| 276 | InstanceKlass* obj) { |
| 277 | assert_locked_or_safepoint(SystemDictionary_lock); |
| 278 | assert(obj != NULL, "adding NULL obj")do { if (!(obj != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 278, "assert(" "obj != __null" ") failed", "adding NULL obj" ); ::breakpoint(); } } while (0); |
| 279 | assert(obj->name() == class_name, "sanity check on name")do { if (!(obj->name() == class_name)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 279, "assert(" "obj->name() == class_name" ") failed", "sanity check on name" ); ::breakpoint(); } } while (0); |
| 280 | |
| 281 | DictionaryEntry* entry = new_entry(hash, obj); |
| 282 | int index = hash_to_index(hash); |
| 283 | add_entry(index, entry); |
| 284 | check_if_needs_resize(); |
| 285 | } |
| 286 | |
| 287 | |
| 288 | // This routine does not lock the dictionary. |
| 289 | // |
| 290 | // Since readers don't hold a lock, we must make sure that system |
| 291 | // dictionary entries are only removed at a safepoint (when only one |
| 292 | // thread is running), and are added to in a safe way (all links must |
| 293 | // be updated in an MT-safe manner). |
| 294 | // |
| 295 | // Callers should be aware that an entry could be added just after |
| 296 | // _buckets[index] is read here, so the caller will not see the new entry. |
| 297 | DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, |
| 298 | Symbol* class_name) { |
| 299 | for (DictionaryEntry* entry = bucket(index); |
| 300 | entry != NULL__null; |
| 301 | entry = entry->next()) { |
| 302 | if (entry->hash() == hash && entry->instance_klass()->name() == class_name) { |
| 303 | return entry; |
| 304 | } |
| 305 | } |
| 306 | return NULL__null; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | |
| 311 | InstanceKlass* Dictionary::find(unsigned int hash, Symbol* name, |
| 312 | Handle protection_domain) { |
| 313 | NoSafepointVerifier nsv; |
| 314 | |
| 315 | int index = hash_to_index(hash); |
| 316 | DictionaryEntry* entry = get_entry(index, hash, name); |
| 317 | if (entry != NULL__null && entry->is_valid_protection_domain(protection_domain)) { |
| 318 | return entry->instance_klass(); |
| 319 | } else { |
| 320 | return NULL__null; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | InstanceKlass* Dictionary::find_class(unsigned int hash, |
| 325 | Symbol* name) { |
| 326 | assert_locked_or_safepoint(SystemDictionary_lock); |
| 327 | |
| 328 | int index = hash_to_index(hash); |
| 329 | assert (index == index_for(name), "incorrect index?")do { if (!(index == index_for(name))) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 329, "assert(" "index == index_for(name)" ") failed", "incorrect index?" ); ::breakpoint(); } } while (0); |
| 330 | |
| 331 | DictionaryEntry* entry = get_entry(index, hash, name); |
| 332 | return (entry != NULL__null) ? entry->instance_klass() : NULL__null; |
| 333 | } |
| 334 | |
| 335 | void Dictionary::add_protection_domain(int index, unsigned int hash, |
| 336 | InstanceKlass* klass, |
| 337 | Handle protection_domain) { |
| 338 | assert(java_lang_System::allow_security_manager(), "only needed if security manager allowed")do { if (!(java_lang_System::allow_security_manager())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 338, "assert(" "java_lang_System::allow_security_manager()" ") failed", "only needed if security manager allowed"); ::breakpoint (); } } while (0); |
| 339 | Symbol* klass_name = klass->name(); |
| 340 | DictionaryEntry* entry = get_entry(index, hash, klass_name); |
| 341 | |
| 342 | assert(entry != NULL,"entry must be present, we just created it")do { if (!(entry != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 342, "assert(" "entry != __null" ") failed", "entry must be present, we just created it" ); ::breakpoint(); } } while (0); |
| 343 | assert(protection_domain() != NULL,do { if (!(protection_domain() != __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 344, "assert(" "protection_domain() != __null" ") failed", "real protection domain should be present" ); ::breakpoint(); } } while (0) |
| 344 | "real protection domain should be present")do { if (!(protection_domain() != __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 344, "assert(" "protection_domain() != __null" ") failed", "real protection domain should be present" ); ::breakpoint(); } } while (0); |
| 345 | |
| 346 | entry->add_protection_domain(loader_data(), protection_domain); |
| 347 | |
| 348 | #ifdef ASSERT1 |
| 349 | assert(loader_data() != ClassLoaderData::the_null_class_loader_data(), "doesn't make sense")do { if (!(loader_data() != ClassLoaderData::the_null_class_loader_data ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 349, "assert(" "loader_data() != ClassLoaderData::the_null_class_loader_data()" ") failed", "doesn't make sense"); ::breakpoint(); } } while (0); |
| 350 | #endif |
| 351 | |
| 352 | assert(entry->contains_protection_domain(protection_domain()),do { if (!(entry->contains_protection_domain(protection_domain ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 353, "assert(" "entry->contains_protection_domain(protection_domain())" ") failed", "now protection domain should be present"); ::breakpoint (); } } while (0) |
| 353 | "now protection domain should be present")do { if (!(entry->contains_protection_domain(protection_domain ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 353, "assert(" "entry->contains_protection_domain(protection_domain())" ") failed", "now protection domain should be present"); ::breakpoint (); } } while (0); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | inline bool Dictionary::is_valid_protection_domain(unsigned int hash, |
| 358 | Symbol* name, |
| 359 | Handle protection_domain) { |
| 360 | int index = hash_to_index(hash); |
| 361 | DictionaryEntry* entry = get_entry(index, hash, name); |
| 362 | return entry->is_valid_protection_domain(protection_domain); |
| 363 | } |
| 364 | |
| 365 | void Dictionary::validate_protection_domain(unsigned int name_hash, |
| 366 | InstanceKlass* klass, |
| 367 | Handle class_loader, |
| 368 | Handle protection_domain, |
| 369 | TRAPSJavaThread* __the_thread__) { |
| 370 | |
| 371 | assert(class_loader() != NULL, "Should not call this")do { if (!(class_loader() != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 371, "assert(" "class_loader() != __null" ") failed", "Should not call this" ); ::breakpoint(); } } while (0); |
| 372 | assert(protection_domain() != NULL, "Should not call this")do { if (!(protection_domain() != __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 372, "assert(" "protection_domain() != __null" ") failed", "Should not call this" ); ::breakpoint(); } } while (0); |
| 373 | |
| 374 | if (!java_lang_System::allow_security_manager() || |
| 375 | is_valid_protection_domain(name_hash, klass->name(), protection_domain)) { |
| 376 | return; |
| 377 | } |
| 378 | |
| 379 | // We only have to call checkPackageAccess if there's a security manager installed. |
| 380 | if (java_lang_System::has_security_manager()) { |
| 381 | |
| 382 | // This handle and the class_loader handle passed in keeps this class from |
| 383 | // being unloaded through several GC points. |
| 384 | // The class_loader handle passed in is the initiating loader. |
| 385 | Handle mirror(THREAD__the_thread__, klass->java_mirror()); |
| 386 | |
| 387 | // Now we have to call back to java to check if the initating class has access |
| 388 | InstanceKlass* system_loader = vmClasses::ClassLoader_klass(); |
| 389 | JavaValue result(T_VOID); |
| 390 | JavaCalls::call_special(&result, |
| 391 | class_loader, |
| 392 | system_loader, |
| 393 | vmSymbols::checkPackageAccess_name(), |
| 394 | vmSymbols::class_protectiondomain_signature(), |
| 395 | mirror, |
| 396 | protection_domain, |
| 397 | THREAD__the_thread__); |
| 398 | |
| 399 | LogTarget(Debug, protectiondomain)LogTargetImpl<LogLevel::Debug, (LogTag::_protectiondomain) , (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG)> lt; |
| 400 | if (lt.is_enabled()) { |
| 401 | ResourceMark rm(THREAD__the_thread__); |
| 402 | // Print out trace information |
| 403 | LogStream ls(lt); |
| 404 | ls.print_cr("Checking package access"); |
| 405 | ls.print("class loader: "); |
| 406 | class_loader()->print_value_on(&ls); |
| 407 | ls.print(" protection domain: "); |
| 408 | protection_domain()->print_value_on(&ls); |
| 409 | ls.print(" loading: "); klass->print_value_on(&ls); |
| 410 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 411 | ls.print_cr(" DENIED !!!!!!!!!!!!!!!!!!!!!"); |
| 412 | } else { |
| 413 | ls.print_cr(" granted"); |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) return; |
| 418 | } |
| 419 | |
| 420 | // If no exception has been thrown, we have validated the protection domain |
| 421 | // Insert the protection domain of the initiating class into the set. |
| 422 | // We still have to add the protection_domain to the dictionary in case a new |
| 423 | // security manager is installed later. Calls to load the same class with class loader |
| 424 | // and protection domain are expected to succeed. |
| 425 | { |
| 426 | MutexLocker mu(THREAD__the_thread__, SystemDictionary_lock); |
| 427 | int d_index = hash_to_index(name_hash); |
| 428 | add_protection_domain(d_index, name_hash, klass, |
| 429 | protection_domain); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | // During class loading we may have cached a protection domain that has |
| 434 | // since been unreferenced, so this entry should be cleared. |
| 435 | void Dictionary::clean_cached_protection_domains(GrowableArray<ProtectionDomainEntry*>* delete_list) { |
| 436 | assert(Thread::current()->is_Java_thread(), "only called by JavaThread")do { if (!(Thread::current()->is_Java_thread())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 436, "assert(" "Thread::current()->is_Java_thread()" ") failed" , "only called by JavaThread"); ::breakpoint(); } } while (0); |
| 437 | assert_lock_strong(SystemDictionary_lock); |
| 438 | assert(!loader_data()->has_class_mirror_holder(), "cld should have a ClassLoader holder not a Class holder")do { if (!(!loader_data()->has_class_mirror_holder())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 438, "assert(" "!loader_data()->has_class_mirror_holder()" ") failed", "cld should have a ClassLoader holder not a Class holder" ); ::breakpoint(); } } while (0); |
| 439 | |
| 440 | if (loader_data()->is_the_null_class_loader_data()) { |
| 441 | // Classes in the boot loader are not loaded with protection domains |
| 442 | return; |
| 443 | } |
| 444 | |
| 445 | for (int index = 0; index < table_size(); index++) { |
| 446 | for (DictionaryEntry* probe = bucket(index); |
| 447 | probe != NULL__null; |
| 448 | probe = probe->next()) { |
| 449 | Klass* e = probe->instance_klass(); |
Value stored to 'e' during its initialization is never read | |
| 450 | |
| 451 | ProtectionDomainEntry* current = probe->pd_set_acquire(); |
| 452 | ProtectionDomainEntry* prev = NULL__null; |
| 453 | while (current != NULL__null) { |
| 454 | if (current->object_no_keepalive() == NULL__null) { |
| 455 | LogTarget(Debug, protectiondomain)LogTargetImpl<LogLevel::Debug, (LogTag::_protectiondomain) , (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG)> lt; |
| 456 | if (lt.is_enabled()) { |
| 457 | ResourceMark rm; |
| 458 | // Print out trace information |
| 459 | LogStream ls(lt); |
| 460 | ls.print_cr("PD in set is not alive:"); |
| 461 | ls.print("class loader: "); loader_data()->class_loader()->print_value_on(&ls); |
| 462 | ls.print(" loading: "); probe->instance_klass()->print_value_on(&ls); |
| 463 | ls.cr(); |
| 464 | } |
| 465 | if (probe->pd_set_acquire() == current) { |
| 466 | probe->release_set_pd_set(current->next_acquire()); |
| 467 | } else { |
| 468 | assert(prev != NULL, "should be set by alive entry")do { if (!(prev != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 468, "assert(" "prev != __null" ") failed", "should be set by alive entry" ); ::breakpoint(); } } while (0); |
| 469 | prev->release_set_next(current->next_acquire()); |
| 470 | } |
| 471 | // Mark current for deletion but in the meantime it can still be |
| 472 | // traversed. |
| 473 | delete_list->push(current); |
| 474 | current = current->next_acquire(); |
| 475 | } else { |
| 476 | prev = current; |
| 477 | current = current->next_acquire(); |
| 478 | } |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | oop SymbolPropertyEntry::method_type() const { |
| 485 | return _method_type.resolve(); |
| 486 | } |
| 487 | |
| 488 | void SymbolPropertyEntry::set_method_type(oop p) { |
| 489 | _method_type = OopHandle(Universe::vm_global(), p); |
| 490 | } |
| 491 | |
| 492 | void SymbolPropertyEntry::free_entry() { |
| 493 | // decrement Symbol refcount here because hashtable doesn't. |
| 494 | literal()->decrement_refcount(); |
| 495 | // Free OopHandle |
| 496 | _method_type.release(Universe::vm_global()); |
| 497 | } |
| 498 | |
| 499 | void SymbolPropertyEntry::print_entry(outputStream* st) const { |
| 500 | symbol()->print_value_on(st); |
| 501 | st->print("/mode=" INTX_FORMAT"%" "l" "d", symbol_mode()); |
| 502 | st->print(" -> "); |
| 503 | bool printed = false; |
| 504 | if (method() != NULL__null) { |
| 505 | method()->print_value_on(st); |
| 506 | printed = true; |
| 507 | } |
| 508 | if (method_type() != NULL__null) { |
| 509 | if (printed) st->print(" and "); |
| 510 | st->print(INTPTR_FORMAT"0x%016" "l" "x", p2i((void *)method_type())); |
| 511 | printed = true; |
| 512 | } |
| 513 | st->print_cr(printed ? "" : "(empty)"); |
| 514 | } |
| 515 | |
| 516 | SymbolPropertyTable::SymbolPropertyTable(int table_size) |
| 517 | : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
| 518 | { |
| 519 | } |
| 520 | SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
| 521 | int number_of_entries) |
| 522 | : Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
| 523 | { |
| 524 | } |
| 525 | |
| 526 | |
| 527 | SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, |
| 528 | Symbol* sym, |
| 529 | intptr_t sym_mode) { |
| 530 | assert(index == index_for(sym, sym_mode), "incorrect index?")do { if (!(index == index_for(sym, sym_mode))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 530, "assert(" "index == index_for(sym, sym_mode)" ") failed" , "incorrect index?"); ::breakpoint(); } } while (0); |
| 531 | for (SymbolPropertyEntry* p = bucket(index); p != NULL__null; p = p->next()) { |
| 532 | if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
| 533 | return p; |
| 534 | } |
| 535 | } |
| 536 | return NULL__null; |
| 537 | } |
| 538 | |
| 539 | |
| 540 | SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, |
| 541 | Symbol* sym, intptr_t sym_mode) { |
| 542 | assert_locked_or_safepoint(SystemDictionary_lock); |
| 543 | assert(index == index_for(sym, sym_mode), "incorrect index?")do { if (!(index == index_for(sym, sym_mode))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 543, "assert(" "index == index_for(sym, sym_mode)" ") failed" , "incorrect index?"); ::breakpoint(); } } while (0); |
| 544 | assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry")do { if (!(find_entry(index, hash, sym, sym_mode) == __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 544, "assert(" "find_entry(index, hash, sym, sym_mode) == __null" ") failed", "no double entry"); ::breakpoint(); } } while (0 ); |
| 545 | |
| 546 | SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
| 547 | Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
| 548 | return p; |
| 549 | } |
| 550 | |
| 551 | void SymbolPropertyTable::methods_do(void f(Method*)) { |
| 552 | for (int index = 0; index < table_size(); index++) { |
| 553 | for (SymbolPropertyEntry* p = bucket(index); p != NULL__null; p = p->next()) { |
| 554 | Method* prop = p->method(); |
| 555 | if (prop != NULL__null) { |
| 556 | f((Method*)prop); |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | void SymbolPropertyTable::free_entry(SymbolPropertyEntry* entry) { |
| 563 | entry->free_entry(); |
| 564 | BasicHashtable<mtSymbol>::free_entry(entry); |
| 565 | } |
| 566 | |
| 567 | void DictionaryEntry::verify_protection_domain_set() { |
| 568 | assert(SafepointSynchronize::is_at_safepoint(), "must only be called as safepoint")do { if (!(SafepointSynchronize::is_at_safepoint())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 568, "assert(" "SafepointSynchronize::is_at_safepoint()" ") failed" , "must only be called as safepoint"); ::breakpoint(); } } while (0); |
| 569 | for (ProtectionDomainEntry* current = pd_set_acquire(); // accessed at a safepoint |
| 570 | current != NULL__null; |
| 571 | current = current->next_acquire()) { |
| 572 | guarantee(oopDesc::is_oop_or_null(current->object_no_keepalive()), "Invalid oop")do { if (!(oopDesc::is_oop_or_null(current->object_no_keepalive ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 572, "guarantee(" "oopDesc::is_oop_or_null(current->object_no_keepalive())" ") failed", "Invalid oop"); ::breakpoint(); } } while (0); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | void DictionaryEntry::print_count(outputStream *st) { |
| 577 | assert_locked_or_safepoint(SystemDictionary_lock); |
| 578 | int count = 0; |
| 579 | for (ProtectionDomainEntry* current = pd_set_acquire(); |
| 580 | current != NULL__null; |
| 581 | current = current->next_acquire()) { |
| 582 | count++; |
| 583 | } |
| 584 | st->print("pd set count = #%d", count); |
| 585 | } |
| 586 | |
| 587 | // ---------------------------------------------------------------------------- |
| 588 | |
| 589 | void Dictionary::print_on(outputStream* st) const { |
| 590 | ResourceMark rm; |
| 591 | |
| 592 | assert(loader_data() != NULL, "loader data should not be null")do { if (!(loader_data() != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 592, "assert(" "loader_data() != __null" ") failed", "loader data should not be null" ); ::breakpoint(); } } while (0); |
| 593 | assert(!loader_data()->has_class_mirror_holder(), "cld should have a ClassLoader holder not a Class holder")do { if (!(!loader_data()->has_class_mirror_holder())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 593, "assert(" "!loader_data()->has_class_mirror_holder()" ") failed", "cld should have a ClassLoader holder not a Class holder" ); ::breakpoint(); } } while (0); |
| 594 | st->print_cr("Java dictionary (table_size=%d, classes=%d, resizable=%s)", |
| 595 | table_size(), number_of_entries(), BOOL_TO_STR(_resizable)((_resizable) ? "true" : "false")); |
| 596 | st->print_cr("^ indicates that initiating loader is different from defining loader"); |
| 597 | |
| 598 | for (int index = 0; index < table_size(); index++) { |
| 599 | for (DictionaryEntry* probe = bucket(index); |
| 600 | probe != NULL__null; |
| 601 | probe = probe->next()) { |
| 602 | Klass* e = probe->instance_klass(); |
| 603 | bool is_defining_class = |
| 604 | (loader_data() == e->class_loader_data()); |
| 605 | st->print("%4d: %s%s", index, is_defining_class ? " " : "^", e->external_name()); |
| 606 | ClassLoaderData* cld = e->class_loader_data(); |
| 607 | if (!loader_data()->is_the_null_class_loader_data()) { |
| 608 | // Class loader output for the dictionary for the null class loader data is |
| 609 | // redundant and obvious. |
| 610 | st->print(", "); |
| 611 | cld->print_value_on(st); |
| 612 | st->print(", "); |
| 613 | probe->print_count(st); |
| 614 | } |
| 615 | st->cr(); |
| 616 | } |
| 617 | } |
| 618 | tty->cr(); |
| 619 | } |
| 620 | |
| 621 | void DictionaryEntry::verify() { |
| 622 | Klass* e = instance_klass(); |
| 623 | guarantee(e->is_instance_klass(),do { if (!(e->is_instance_klass())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 624, "guarantee(" "e->is_instance_klass()" ") failed", "Verify of dictionary failed" ); ::breakpoint(); } } while (0) |
| 624 | "Verify of dictionary failed")do { if (!(e->is_instance_klass())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 624, "guarantee(" "e->is_instance_klass()" ") failed", "Verify of dictionary failed" ); ::breakpoint(); } } while (0); |
| 625 | e->verify(); |
| 626 | verify_protection_domain_set(); |
| 627 | } |
| 628 | |
| 629 | void Dictionary::verify() { |
| 630 | guarantee(number_of_entries() >= 0, "Verify of dictionary failed")do { if (!(number_of_entries() >= 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 630, "guarantee(" "number_of_entries() >= 0" ") failed", "Verify of dictionary failed"); ::breakpoint(); } } while (0 ); |
| 631 | |
| 632 | ClassLoaderData* cld = loader_data(); |
| 633 | // class loader must be present; a null class loader is the |
| 634 | // boostrap loader |
| 635 | guarantee(cld != NULL &&do { if (!(cld != __null && (cld->the_null_class_loader_data () || cld->class_loader()->is_instance()))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 637, "guarantee(" "cld != NULL && (cld->the_null_class_loader_data() || cld->class_loader()->is_instance())" ") failed", "checking type of class_loader"); ::breakpoint() ; } } while (0) |
| 636 | (cld->the_null_class_loader_data() || cld->class_loader()->is_instance()),do { if (!(cld != __null && (cld->the_null_class_loader_data () || cld->class_loader()->is_instance()))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 637, "guarantee(" "cld != NULL && (cld->the_null_class_loader_data() || cld->class_loader()->is_instance())" ") failed", "checking type of class_loader"); ::breakpoint() ; } } while (0) |
| 637 | "checking type of class_loader")do { if (!(cld != __null && (cld->the_null_class_loader_data () || cld->class_loader()->is_instance()))) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/classfile/dictionary.cpp" , 637, "guarantee(" "cld != NULL && (cld->the_null_class_loader_data() || cld->class_loader()->is_instance())" ") failed", "checking type of class_loader"); ::breakpoint() ; } } while (0); |
| 638 | |
| 639 | ResourceMark rm; |
| 640 | stringStream tempst; |
| 641 | tempst.print("System Dictionary for %s class loader", cld->loader_name_and_id()); |
| 642 | verify_table<DictionaryEntry>(tempst.as_string()); |
| 643 | } |