author | goetz |
Tue, 29 Apr 2014 15:17:27 +0200 | |
changeset 24351 | 61b33cc6d3cf |
parent 22794 | f1c014ad3754 |
child 24424 | 2658d7834c6e |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "classfile/dictionary.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "memory/iterator.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "prims/jvmtiRedefineClassesTrace.hpp" |
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#include "runtime/orderAccess.inline.hpp" |
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#include "utilities/hashtable.inline.hpp" |
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DictionaryEntry* Dictionary::_current_class_entry = NULL; |
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int Dictionary::_current_class_index = 0; |
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Dictionary::Dictionary(int table_size) |
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: TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry)) { |
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_current_class_index = 0; |
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_current_class_entry = NULL; |
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_pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
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}; |
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Dictionary::Dictionary(int table_size, HashtableBucket<mtClass>* t, |
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int number_of_entries) |
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: TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry), t, number_of_entries) { |
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_current_class_index = 0; |
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_current_class_entry = NULL; |
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_pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
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}; |
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ProtectionDomainCacheEntry* Dictionary::cache_get(oop protection_domain) { |
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return _pd_cache_table->get(protection_domain); |
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} |
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DictionaryEntry* Dictionary::new_entry(unsigned int hash, Klass* klass, |
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ClassLoaderData* loader_data) { |
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DictionaryEntry* entry = (DictionaryEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass); |
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entry->set_loader_data(loader_data); |
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entry->set_pd_set(NULL); |
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assert(klass->oop_is_instance(), "Must be"); |
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return entry; |
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} |
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void Dictionary::free_entry(DictionaryEntry* entry) { |
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// avoid recursion when deleting linked list |
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while (entry->pd_set() != NULL) { |
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ProtectionDomainEntry* to_delete = entry->pd_set(); |
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entry->set_pd_set(to_delete->next()); |
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delete to_delete; |
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} |
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Hashtable<Klass*, mtClass>::free_entry(entry); |
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} |
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bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { |
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#ifdef ASSERT |
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if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
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// Ensure this doesn't show up in the pd_set (invariant) |
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bool in_pd_set = false; |
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for (ProtectionDomainEntry* current = _pd_set; |
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current != NULL; |
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current = current->next()) { |
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if (current->protection_domain() == protection_domain) { |
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in_pd_set = true; |
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break; |
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} |
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} |
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if (in_pd_set) { |
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assert(false, "A klass's protection domain should not show up " |
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"in its sys. dict. PD set"); |
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} |
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} |
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#endif /* ASSERT */ |
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if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
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// Succeeds trivially |
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return true; |
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} |
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for (ProtectionDomainEntry* current = _pd_set; |
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current != NULL; |
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current = current->next()) { |
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if (current->protection_domain() == protection_domain) return true; |
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} |
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return false; |
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} |
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void DictionaryEntry::add_protection_domain(Dictionary* dict, oop protection_domain) { |
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assert_locked_or_safepoint(SystemDictionary_lock); |
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if (!contains_protection_domain(protection_domain)) { |
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ProtectionDomainCacheEntry* entry = dict->cache_get(protection_domain); |
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ProtectionDomainEntry* new_head = |
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new ProtectionDomainEntry(entry, _pd_set); |
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// Warning: Preserve store ordering. The SystemDictionary is read |
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// without locks. The new ProtectionDomainEntry must be |
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// complete before other threads can be allowed to see it |
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// via a store to _pd_set. |
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OrderAccess::release_store_ptr(&_pd_set, new_head); |
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} |
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if (TraceProtectionDomainVerification && WizardMode) { |
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print(); |
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} |
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} |
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bool Dictionary::do_unloading() { |
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assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
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bool class_was_unloaded = false; |
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int index = 0; // Defined here for portability! Do not move |
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// Remove unloadable entries and classes from system dictionary |
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// The placeholder array has been handled in always_strong_oops_do. |
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DictionaryEntry* probe = NULL; |
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for (index = 0; index < table_size(); index++) { |
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for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { |
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probe = *p; |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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InstanceKlass* ik = InstanceKlass::cast(e); |
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// Non-unloadable classes were handled in always_strong_oops_do |
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if (!is_strongly_reachable(loader_data, e)) { |
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// Entry was not visited in phase1 (negated test from phase1) |
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assert(!loader_data->is_the_null_class_loader_data(), "unloading entry with null class loader"); |
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ClassLoaderData* k_def_class_loader_data = ik->class_loader_data(); |
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// Do we need to delete this system dictionary entry? |
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bool purge_entry = false; |
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// Do we need to delete this system dictionary entry? |
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if (loader_data->is_unloading()) { |
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// If the loader is not live this entry should always be |
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// removed (will never be looked up again). Note that this is |
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// not the same as unloading the referred class. |
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if (k_def_class_loader_data == loader_data) { |
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// This is the defining entry, so the referred class is about |
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// to be unloaded. |
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class_was_unloaded = true; |
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} |
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// Also remove this system dictionary entry. |
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purge_entry = true; |
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} else { |
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// The loader in this entry is alive. If the klass is dead, |
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// (determined by checking the defining class loader) |
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// the loader must be an initiating loader (rather than the |
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// defining loader). Remove this entry. |
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if (k_def_class_loader_data->is_unloading()) { |
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// If we get here, the class_loader_data must not be the defining |
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// loader, it must be an initiating one. |
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assert(k_def_class_loader_data != loader_data, |
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"cannot have live defining loader and unreachable klass"); |
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// Loader is live, but class and its defining loader are dead. |
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// Remove the entry. The class is going away. |
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purge_entry = true; |
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} |
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} |
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if (purge_entry) { |
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*p = probe->next(); |
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if (probe == _current_class_entry) { |
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_current_class_entry = NULL; |
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} |
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free_entry(probe); |
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continue; |
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} |
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} |
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p = probe->next_addr(); |
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} |
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} |
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return class_was_unloaded; |
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} |
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void Dictionary::always_strong_oops_do(OopClosure* blk) { |
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// Follow all system classes and temporary placeholders in dictionary; only |
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// protection domain oops contain references into the heap. In a first |
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205 |
// pass over the system dictionary determine which need to be treated as |
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// strongly reachable and mark them as such. |
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for (int index = 0; index < table_size(); index++) { |
208 |
for (DictionaryEntry *probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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if (is_strongly_reachable(loader_data, e)) { |
20405 | 214 |
probe->set_strongly_reachable(); |
1 | 215 |
} |
216 |
} |
|
217 |
} |
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20405 | 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); |
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1 | 221 |
} |
222 |
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void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
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// Follow all system classes and temporary placeholders in dictionary |
1 | 226 |
for (int index = 0; index < table_size(); index++) { |
227 |
for (DictionaryEntry* probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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if (is_strongly_reachable(loader_data, e)) { |
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closure->do_klass(e); |
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} |
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} |
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} |
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} |
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// Just the classes from defining class loaders |
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void Dictionary::classes_do(void f(Klass*)) { |
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for (int index = 0; index < table_size(); index++) { |
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for (DictionaryEntry* probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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Klass* k = probe->klass(); |
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if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
1 | 248 |
f(k); |
249 |
} |
|
250 |
} |
|
251 |
} |
|
252 |
} |
|
253 |
||
254 |
// Added for initialize_itable_for_klass to handle exceptions |
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255 |
// Just the classes from defining class loaders |
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void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
1 | 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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Klass* k = probe->klass(); |
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if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
1 | 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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void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
1 | 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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Klass* k = probe->klass(); |
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f(k, probe->loader_data()); |
1 | 278 |
} |
279 |
} |
|
280 |
} |
|
281 |
||
282 |
void Dictionary::oops_do(OopClosure* f) { |
|
20405 | 283 |
// Only the protection domain oops contain references into the heap. Iterate |
284 |
// over all of them. |
|
285 |
_pd_cache_table->oops_do(f); |
|
1 | 286 |
} |
287 |
||
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288 |
void Dictionary::methods_do(void f(Method*)) { |
1 | 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()) { |
1 | 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); |
1 | 297 |
} |
298 |
} |
|
299 |
} |
|
300 |
} |
|
301 |
||
20405 | 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 |
} |
|
1 | 307 |
|
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308 |
Klass* Dictionary::try_get_next_class() { |
1 | 309 |
while (true) { |
310 |
if (_current_class_entry != NULL) { |
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311 |
Klass* k = _current_class_entry->klass(); |
1 | 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, |
1 | 328 |
KlassHandle obj) { |
329 |
assert_locked_or_safepoint(SystemDictionary_lock); |
|
330 |
assert(obj() != NULL, "adding NULL obj"); |
|
14488 | 331 |
assert(obj()->name() == class_name, "sanity check on name"); |
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|
332 |
assert(loader_data != NULL, "Must be non-NULL"); |
1 | 333 |
|
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334 |
unsigned int hash = compute_hash(class_name, loader_data); |
1 | 335 |
int index = hash_to_index(hash); |
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336 |
DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
1 | 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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Symbol* class_name, |
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|
352 |
ClassLoaderData* loader_data) { |
1 | 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)) { |
1 | 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); |
1 | 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) { |
1 | 379 |
assert_locked_or_safepoint(SystemDictionary_lock); |
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380 |
assert (index == index_for(name, loader_data), "incorrect index?"); |
1 | 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; |
1 | 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?"); |
1 | 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; |
1 | 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, |
1 | 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); |
1 | 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 |
||
20405 | 410 |
entry->add_protection_domain(this, protection_domain()); |
1 | 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, |
1 | 420 |
Handle protection_domain) { |
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|
421 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
1 | 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); |
1 | 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 |
1 | 455 |
p->set_next(bucket(index)); |
456 |
set_entry(index, p); |
|
457 |
} |
|
458 |
} |
|
459 |
||
20405 | 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, |
|
20408 | 511 |
this, (void*)literal(), _strongly_reachable, next()); |
20405 | 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 |
||
2534 | 600 |
SymbolPropertyTable::SymbolPropertyTable(int table_size) |
13195 | 601 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
2534 | 602 |
{ |
603 |
} |
|
13195 | 604 |
SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
2534 | 605 |
int number_of_entries) |
13195 | 606 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
2534 | 607 |
{ |
608 |
} |
|
609 |
||
610 |
||
611 |
SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, |
|
8076
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|
612 |
Symbol* sym, |
5420
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diff
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|
613 |
intptr_t sym_mode) { |
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|
614 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
2534 | 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) { |
2534 | 617 |
return p; |
618 |
} |
|
619 |
} |
|
620 |
return NULL; |
|
621 |
} |
|
622 |
||
623 |
||
624 |
SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, |
|
8076
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changeset
|
625 |
Symbol* sym, intptr_t sym_mode) { |
2534 | 626 |
assert_locked_or_safepoint(SystemDictionary_lock); |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
627 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
628 |
assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
2534 | 629 |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
630 |
SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
13195 | 631 |
Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
2534 | 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()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
638 |
if (p->method_type() != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
639 |
f->do_oop(p->method_type_addr()); |
2534 | 640 |
} |
641 |
} |
|
642 |
} |
|
643 |
} |
|
644 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
645 |
void SymbolPropertyTable::methods_do(void f(Method*)) { |
2534 | 646 |
for (int index = 0; index < table_size(); index++) { |
647 |
for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
648 |
Method* prop = p->method(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
649 |
if (prop != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
650 |
f((Method*)prop); |
2534 | 651 |
} |
652 |
} |
|
653 |
} |
|
654 |
} |
|
655 |
||
1 | 656 |
|
657 |
// ---------------------------------------------------------------------------- |
|
658 |
#ifndef PRODUCT |
|
659 |
||
660 |
void Dictionary::print() { |
|
661 |
ResourceMark rm; |
|
662 |
HandleMark hm; |
|
663 |
||
11628
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
8921
diff
changeset
|
664 |
tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
8921
diff
changeset
|
665 |
table_size(), number_of_entries()); |
1 | 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); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
674 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
675 |
ClassLoaderData* loader_data = probe->loader_data(); |
1 | 676 |
bool is_defining_class = |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
677 |
(loader_data == InstanceKlass::cast(e)->class_loader_data()); |
1 | 678 |
tty->print("%s%s", is_defining_class ? " " : "^", |
14488 | 679 |
e->external_name()); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
680 |
|
1 | 681 |
tty->print(", loader "); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
682 |
loader_data->print_value(); |
1 | 683 |
tty->cr(); |
684 |
} |
|
685 |
} |
|
20405 | 686 |
tty->cr(); |
687 |
_pd_cache_table->print(); |
|
688 |
tty->cr(); |
|
1 | 689 |
} |
690 |
||
691 |
#endif |
|
692 |
||
693 |
void Dictionary::verify() { |
|
694 |
guarantee(number_of_entries() >= 0, "Verify of system dictionary failed"); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
695 |
|
1 | 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()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
701 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
702 |
ClassLoaderData* loader_data = probe->loader_data(); |
14488 | 703 |
guarantee(e->oop_is_instance(), |
1 | 704 |
"Verify of system dictionary failed"); |
705 |
// class loader must be present; a null class loader is the |
|
706 |
// boostrap loader |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
707 |
guarantee(loader_data != NULL || DumpSharedSpaces || |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
708 |
loader_data->class_loader() == NULL || |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
709 |
loader_data->class_loader()->is_instance(), |
1 | 710 |
"checking type of class_loader"); |
22794
f1c014ad3754
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents:
20408
diff
changeset
|
711 |
e->verify(); |
1 | 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())); |
|
20405 | 719 |
|
720 |
_pd_cache_table->verify(); |
|
1 | 721 |
} |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
722 |