author | drwhite |
Wed, 17 Feb 2016 18:02:03 -0500 | |
changeset 36187 | 1d61b06a3ae1 |
parent 35498 | 392b50de06c6 |
child 36381 | b9ed6bef9364 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2016, 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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||
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#include "precompiled.hpp" |
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#include "classfile/classLoaderData.inline.hpp" |
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#include "classfile/sharedClassUtil.hpp" |
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#include "classfile/dictionary.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/systemDictionaryShared.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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size_t Dictionary::entry_size() { |
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if (DumpSharedSpaces) { |
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return SystemDictionaryShared::dictionary_entry_size(); |
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} else { |
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return sizeof(DictionaryEntry); |
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} |
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} |
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Dictionary::Dictionary(int table_size) |
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: TwoOopHashtable<Klass*, mtClass>(table_size, (int)entry_size()) { |
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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, (int)entry_size(), 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->is_instance_klass(), "Must be"); |
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if (DumpSharedSpaces) { |
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SystemDictionaryShared::init_shared_dictionary_entry(klass, entry); |
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} |
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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 == 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 == 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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void Dictionary::do_unloading() { |
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assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
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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 (int 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). |
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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, |
1 | 181 |
"cannot have live defining loader and unreachable klass"); |
182 |
// 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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188 |
if (purge_entry) { |
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*p = probe->next(); |
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190 |
if (probe == _current_class_entry) { |
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191 |
_current_class_entry = NULL; |
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192 |
} |
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193 |
free_entry(probe); |
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continue; |
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195 |
} |
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196 |
} |
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p = probe->next_addr(); |
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198 |
} |
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} |
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} |
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void Dictionary::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
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// Skip the strong roots probe marking if the closures are the same. |
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if (strong == weak) { |
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oops_do(strong); |
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return; |
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} |
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|
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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* 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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probe->set_strongly_reachable(); |
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} |
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} |
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} |
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_pd_cache_table->roots_oops_do(strong, weak); |
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} |
1 | 222 |
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void Dictionary::remove_classes_in_error_state() { |
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assert(DumpSharedSpaces, "supported only when dumping"); |
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DictionaryEntry* probe = NULL; |
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for (int 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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InstanceKlass* ik = InstanceKlass::cast(probe->klass()); |
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if (ik->is_in_error_state()) { // purge this 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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234 |
} |
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235 |
free_entry(probe); |
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236 |
ResourceMark rm; |
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237 |
tty->print_cr("Preload Warning: Removed error class: %s", ik->external_name()); |
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238 |
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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} |
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|
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246 |
void Dictionary::always_strong_oops_do(OopClosure* blk) { |
20405 | 247 |
// Follow all system classes and temporary placeholders in dictionary; only |
248 |
// protection domain oops contain references into the heap. In a first |
|
249 |
// pass over the system dictionary determine which need to be treated as |
|
250 |
// strongly reachable and mark them as such. |
|
1 | 251 |
for (int index = 0; index < table_size(); index++) { |
252 |
for (DictionaryEntry *probe = bucket(index); |
|
253 |
probe != NULL; |
|
254 |
probe = probe->next()) { |
|
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255 |
Klass* e = probe->klass(); |
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256 |
ClassLoaderData* loader_data = probe->loader_data(); |
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257 |
if (is_strongly_reachable(loader_data, e)) { |
20405 | 258 |
probe->set_strongly_reachable(); |
1 | 259 |
} |
260 |
} |
|
261 |
} |
|
20405 | 262 |
// Then iterate over the protection domain cache to apply the closure on the |
263 |
// previously marked ones. |
|
264 |
_pd_cache_table->always_strong_oops_do(blk); |
|
1 | 265 |
} |
266 |
||
267 |
||
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268 |
void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
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// Follow all system classes and temporary placeholders in dictionary |
1 | 270 |
for (int index = 0; index < table_size(); index++) { |
271 |
for (DictionaryEntry* probe = bucket(index); |
|
272 |
probe != NULL; |
|
273 |
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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278 |
} |
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279 |
} |
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280 |
} |
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281 |
} |
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|
282 |
|
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283 |
|
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284 |
// Just the classes from defining class loaders |
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285 |
void Dictionary::classes_do(void f(Klass*)) { |
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286 |
for (int index = 0; index < table_size(); index++) { |
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287 |
for (DictionaryEntry* probe = bucket(index); |
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probe != NULL; |
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289 |
probe = probe->next()) { |
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290 |
Klass* k = probe->klass(); |
33602 | 291 |
if (probe->loader_data() == k->class_loader_data()) { |
1 | 292 |
f(k); |
293 |
} |
|
294 |
} |
|
295 |
} |
|
296 |
} |
|
297 |
||
298 |
// Added for initialize_itable_for_klass to handle exceptions |
|
299 |
// Just the classes from defining class loaders |
|
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300 |
void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
1 | 301 |
for (int index = 0; index < table_size(); index++) { |
302 |
for (DictionaryEntry* probe = bucket(index); |
|
303 |
probe != NULL; |
|
304 |
probe = probe->next()) { |
|
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|
305 |
Klass* k = probe->klass(); |
33602 | 306 |
if (probe->loader_data() == k->class_loader_data()) { |
1 | 307 |
f(k, CHECK); |
308 |
} |
|
309 |
} |
|
310 |
} |
|
311 |
} |
|
312 |
||
313 |
// All classes, and their class loaders |
|
314 |
// Don't iterate over placeholders |
|
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|
315 |
void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
1 | 316 |
for (int index = 0; index < table_size(); index++) { |
317 |
for (DictionaryEntry* probe = bucket(index); |
|
318 |
probe != NULL; |
|
319 |
probe = probe->next()) { |
|
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|
320 |
Klass* k = probe->klass(); |
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|
321 |
f(k, probe->loader_data()); |
1 | 322 |
} |
323 |
} |
|
324 |
} |
|
325 |
||
326 |
void Dictionary::oops_do(OopClosure* f) { |
|
20405 | 327 |
// Only the protection domain oops contain references into the heap. Iterate |
328 |
// over all of them. |
|
329 |
_pd_cache_table->oops_do(f); |
|
1 | 330 |
} |
331 |
||
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|
332 |
void Dictionary::methods_do(void f(Method*)) { |
1 | 333 |
for (int index = 0; index < table_size(); index++) { |
334 |
for (DictionaryEntry* probe = bucket(index); |
|
335 |
probe != NULL; |
|
336 |
probe = probe->next()) { |
|
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|
337 |
Klass* k = probe->klass(); |
33602 | 338 |
if (probe->loader_data() == k->class_loader_data()) { |
1 | 339 |
// only take klass is we have the entry with the defining class loader |
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|
340 |
InstanceKlass::cast(k)->methods_do(f); |
1 | 341 |
} |
342 |
} |
|
343 |
} |
|
344 |
} |
|
345 |
||
20405 | 346 |
void Dictionary::unlink(BoolObjectClosure* is_alive) { |
347 |
// Only the protection domain cache table may contain references to the heap |
|
348 |
// that need to be unlinked. |
|
349 |
_pd_cache_table->unlink(is_alive); |
|
350 |
} |
|
1 | 351 |
|
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|
352 |
Klass* Dictionary::try_get_next_class() { |
1 | 353 |
while (true) { |
354 |
if (_current_class_entry != NULL) { |
|
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|
355 |
Klass* k = _current_class_entry->klass(); |
1 | 356 |
_current_class_entry = _current_class_entry->next(); |
357 |
return k; |
|
358 |
} |
|
359 |
_current_class_index = (_current_class_index + 1) % table_size(); |
|
360 |
_current_class_entry = bucket(_current_class_index); |
|
361 |
} |
|
362 |
// never reached |
|
363 |
} |
|
364 |
||
365 |
// Add a loaded class to the system dictionary. |
|
366 |
// Readers of the SystemDictionary aren't always locked, so _buckets |
|
367 |
// is volatile. The store of the next field in the constructor is |
|
368 |
// also cast to volatile; we do this to ensure store order is maintained |
|
369 |
// by the compilers. |
|
370 |
||
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|
371 |
void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
1 | 372 |
KlassHandle obj) { |
373 |
assert_locked_or_safepoint(SystemDictionary_lock); |
|
374 |
assert(obj() != NULL, "adding NULL obj"); |
|
14488 | 375 |
assert(obj()->name() == class_name, "sanity check on name"); |
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|
376 |
assert(loader_data != NULL, "Must be non-NULL"); |
1 | 377 |
|
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|
378 |
unsigned int hash = compute_hash(class_name, loader_data); |
1 | 379 |
int index = hash_to_index(hash); |
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|
380 |
DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
1 | 381 |
add_entry(index, entry); |
382 |
} |
|
383 |
||
384 |
||
385 |
// This routine does not lock the system dictionary. |
|
386 |
// |
|
387 |
// Since readers don't hold a lock, we must make sure that system |
|
388 |
// dictionary entries are only removed at a safepoint (when only one |
|
389 |
// thread is running), and are added to in a safe way (all links must |
|
390 |
// be updated in an MT-safe manner). |
|
391 |
// |
|
392 |
// Callers should be aware that an entry could be added just after |
|
393 |
// _buckets[index] is read here, so the caller will not see the new entry. |
|
394 |
DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, |
|
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|
395 |
Symbol* class_name, |
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|
396 |
ClassLoaderData* loader_data) { |
1 | 397 |
debug_only(_lookup_count++); |
398 |
for (DictionaryEntry* entry = bucket(index); |
|
399 |
entry != NULL; |
|
400 |
entry = entry->next()) { |
|
13728
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|
401 |
if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
1 | 402 |
return entry; |
403 |
} |
|
404 |
debug_only(_lookup_length++); |
|
405 |
} |
|
406 |
return NULL; |
|
407 |
} |
|
408 |
||
409 |
||
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|
410 |
Klass* Dictionary::find(int index, unsigned int hash, Symbol* name, |
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|
411 |
ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
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changeset
|
412 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
1 | 413 |
if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
414 |
return entry->klass(); |
|
415 |
} else { |
|
416 |
return NULL; |
|
417 |
} |
|
418 |
} |
|
419 |
||
420 |
||
13728
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|
421 |
Klass* Dictionary::find_class(int index, unsigned int hash, |
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changeset
|
422 |
Symbol* name, ClassLoaderData* loader_data) { |
1 | 423 |
assert_locked_or_safepoint(SystemDictionary_lock); |
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|
424 |
assert (index == index_for(name, loader_data), "incorrect index?"); |
1 | 425 |
|
13728
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changeset
|
426 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
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changeset
|
427 |
return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
1 | 428 |
} |
429 |
||
430 |
||
431 |
// Variant of find_class for shared classes. No locking required, as |
|
432 |
// that table is static. |
|
433 |
||
13728
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changeset
|
434 |
Klass* Dictionary::find_shared_class(int index, unsigned int hash, |
8076
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|
435 |
Symbol* name) { |
13728
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|
436 |
assert (index == index_for(name, NULL), "incorrect index?"); |
1 | 437 |
|
13728
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|
438 |
DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
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|
439 |
return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
1 | 440 |
} |
441 |
||
442 |
||
443 |
void Dictionary::add_protection_domain(int index, unsigned int hash, |
|
444 |
instanceKlassHandle klass, |
|
13728
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|
445 |
ClassLoaderData* loader_data, Handle protection_domain, |
1 | 446 |
TRAPS) { |
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|
447 |
Symbol* klass_name = klass->name(); |
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|
448 |
DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
1 | 449 |
|
450 |
assert(entry != NULL,"entry must be present, we just created it"); |
|
451 |
assert(protection_domain() != NULL, |
|
452 |
"real protection domain should be present"); |
|
453 |
||
20405 | 454 |
entry->add_protection_domain(this, protection_domain()); |
1 | 455 |
|
456 |
assert(entry->contains_protection_domain(protection_domain()), |
|
457 |
"now protection domain should be present"); |
|
458 |
} |
|
459 |
||
460 |
||
461 |
bool Dictionary::is_valid_protection_domain(int index, unsigned int hash, |
|
8076
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changeset
|
462 |
Symbol* name, |
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|
463 |
ClassLoaderData* loader_data, |
1 | 464 |
Handle protection_domain) { |
13728
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changeset
|
465 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
1 | 466 |
return entry->is_valid_protection_domain(protection_domain); |
467 |
} |
|
468 |
||
469 |
||
470 |
void Dictionary::reorder_dictionary() { |
|
471 |
||
472 |
// Copy all the dictionary entries into a single master list. |
|
473 |
||
474 |
DictionaryEntry* master_list = NULL; |
|
475 |
for (int i = 0; i < table_size(); ++i) { |
|
476 |
DictionaryEntry* p = bucket(i); |
|
477 |
while (p != NULL) { |
|
478 |
DictionaryEntry* tmp; |
|
479 |
tmp = p->next(); |
|
480 |
p->set_next(master_list); |
|
481 |
master_list = p; |
|
482 |
p = tmp; |
|
483 |
} |
|
484 |
set_entry(i, NULL); |
|
485 |
} |
|
486 |
||
487 |
// Add the dictionary entries back to the list in the correct buckets. |
|
488 |
while (master_list != NULL) { |
|
489 |
DictionaryEntry* p = master_list; |
|
490 |
master_list = master_list->next(); |
|
491 |
p->set_next(NULL); |
|
33602 | 492 |
Symbol* class_name = p->klass()->name(); |
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|
493 |
// Since the null class loader data isn't copied to the CDS archive, |
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|
494 |
// compute the hash with NULL for loader data. |
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changeset
|
495 |
unsigned int hash = compute_hash(class_name, NULL); |
1 | 496 |
int index = hash_to_index(hash); |
497 |
p->set_hash(hash); |
|
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|
498 |
p->set_loader_data(NULL); // loader_data isn't copied to CDS |
1 | 499 |
p->set_next(bucket(index)); |
500 |
set_entry(index, p); |
|
501 |
} |
|
502 |
} |
|
503 |
||
35498
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changeset
|
504 |
|
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
505 |
unsigned int ProtectionDomainCacheTable::compute_hash(oop protection_domain) { |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
506 |
return (unsigned int)(protection_domain->identity_hash()); |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
507 |
} |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
508 |
|
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
509 |
int ProtectionDomainCacheTable::index_for(oop protection_domain) { |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
510 |
return hash_to_index(compute_hash(protection_domain)); |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
511 |
} |
392b50de06c6
8146401: Clean up oop.hpp: add inline directives and fix header files
goetz
parents:
34257
diff
changeset
|
512 |
|
20405 | 513 |
ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
514 |
: Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) |
|
515 |
{ |
|
516 |
} |
|
517 |
||
518 |
void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { |
|
519 |
assert(SafepointSynchronize::is_at_safepoint(), "must be"); |
|
520 |
for (int i = 0; i < table_size(); ++i) { |
|
521 |
ProtectionDomainCacheEntry** p = bucket_addr(i); |
|
522 |
ProtectionDomainCacheEntry* entry = bucket(i); |
|
523 |
while (entry != NULL) { |
|
524 |
if (is_alive->do_object_b(entry->literal())) { |
|
525 |
p = entry->next_addr(); |
|
526 |
} else { |
|
527 |
*p = entry->next(); |
|
528 |
free_entry(entry); |
|
529 |
} |
|
530 |
entry = *p; |
|
531 |
} |
|
532 |
} |
|
533 |
} |
|
534 |
||
535 |
void ProtectionDomainCacheTable::oops_do(OopClosure* f) { |
|
536 |
for (int index = 0; index < table_size(); index++) { |
|
537 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
538 |
probe != NULL; |
|
539 |
probe = probe->next()) { |
|
540 |
probe->oops_do(f); |
|
541 |
} |
|
542 |
} |
|
543 |
} |
|
544 |
||
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
545 |
void ProtectionDomainCacheTable::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
546 |
for (int index = 0; index < table_size(); index++) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
547 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
548 |
probe != NULL; |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
549 |
probe = probe->next()) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
550 |
if (probe->is_strongly_reachable()) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
551 |
probe->reset_strongly_reachable(); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
552 |
probe->oops_do(strong); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
553 |
} else { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
554 |
if (weak != NULL) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
555 |
probe->oops_do(weak); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
556 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
557 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
558 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
559 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
560 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
561 |
|
20405 | 562 |
uint ProtectionDomainCacheTable::bucket_size() { |
563 |
return sizeof(ProtectionDomainCacheEntry); |
|
564 |
} |
|
565 |
||
566 |
#ifndef PRODUCT |
|
567 |
void ProtectionDomainCacheTable::print() { |
|
568 |
tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", |
|
569 |
table_size(), number_of_entries()); |
|
570 |
for (int index = 0; index < table_size(); index++) { |
|
571 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
572 |
probe != NULL; |
|
573 |
probe = probe->next()) { |
|
574 |
probe->print(); |
|
575 |
} |
|
576 |
} |
|
577 |
} |
|
578 |
||
579 |
void ProtectionDomainCacheEntry::print() { |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
27618
diff
changeset
|
580 |
tty->print_cr("entry " PTR_FORMAT " value " PTR_FORMAT " strongly_reachable %d next " PTR_FORMAT, |
33148
68fa8b6c4340
8042893: compiler: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
31592
diff
changeset
|
581 |
p2i(this), p2i(literal()), _strongly_reachable, p2i(next())); |
20405 | 582 |
} |
583 |
#endif |
|
584 |
||
585 |
void ProtectionDomainCacheTable::verify() { |
|
586 |
int element_count = 0; |
|
587 |
for (int index = 0; index < table_size(); index++) { |
|
588 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
589 |
probe != NULL; |
|
590 |
probe = probe->next()) { |
|
591 |
probe->verify(); |
|
592 |
element_count++; |
|
593 |
} |
|
594 |
} |
|
595 |
guarantee(number_of_entries() == element_count, |
|
596 |
"Verify of protection domain cache table failed"); |
|
597 |
debug_only(verify_lookup_length((double)number_of_entries() / table_size())); |
|
598 |
} |
|
599 |
||
600 |
void ProtectionDomainCacheEntry::verify() { |
|
601 |
guarantee(literal()->is_oop(), "must be an oop"); |
|
602 |
} |
|
603 |
||
604 |
void ProtectionDomainCacheTable::always_strong_oops_do(OopClosure* f) { |
|
605 |
// the caller marked the protection domain cache entries that we need to apply |
|
606 |
// the closure on. Only process them. |
|
607 |
for (int index = 0; index < table_size(); index++) { |
|
608 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
609 |
probe != NULL; |
|
610 |
probe = probe->next()) { |
|
611 |
if (probe->is_strongly_reachable()) { |
|
612 |
probe->reset_strongly_reachable(); |
|
613 |
probe->oops_do(f); |
|
614 |
} |
|
615 |
} |
|
616 |
} |
|
617 |
} |
|
618 |
||
619 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(oop protection_domain) { |
|
620 |
unsigned int hash = compute_hash(protection_domain); |
|
621 |
int index = hash_to_index(hash); |
|
622 |
||
623 |
ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); |
|
624 |
if (entry == NULL) { |
|
625 |
entry = add_entry(index, hash, protection_domain); |
|
626 |
} |
|
627 |
return entry; |
|
628 |
} |
|
629 |
||
630 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, oop protection_domain) { |
|
631 |
for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
632 |
if (e->protection_domain() == protection_domain) { |
|
633 |
return e; |
|
634 |
} |
|
635 |
} |
|
636 |
||
637 |
return NULL; |
|
638 |
} |
|
639 |
||
640 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, oop protection_domain) { |
|
641 |
assert_locked_or_safepoint(SystemDictionary_lock); |
|
642 |
assert(index == index_for(protection_domain), "incorrect index?"); |
|
643 |
assert(find_entry(index, protection_domain) == NULL, "no double entry"); |
|
644 |
||
645 |
ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); |
|
646 |
Hashtable<oop, mtClass>::add_entry(index, p); |
|
647 |
return p; |
|
648 |
} |
|
649 |
||
650 |
void ProtectionDomainCacheTable::free(ProtectionDomainCacheEntry* to_delete) { |
|
651 |
unsigned int hash = compute_hash(to_delete->protection_domain()); |
|
652 |
int index = hash_to_index(hash); |
|
653 |
||
654 |
ProtectionDomainCacheEntry** p = bucket_addr(index); |
|
655 |
ProtectionDomainCacheEntry* entry = bucket(index); |
|
656 |
while (true) { |
|
657 |
assert(entry != NULL, "sanity"); |
|
658 |
||
659 |
if (entry == to_delete) { |
|
660 |
*p = entry->next(); |
|
661 |
Hashtable<oop, mtClass>::free_entry(entry); |
|
662 |
break; |
|
663 |
} else { |
|
664 |
p = entry->next_addr(); |
|
665 |
entry = *p; |
|
666 |
} |
|
667 |
} |
|
668 |
} |
|
669 |
||
2534 | 670 |
SymbolPropertyTable::SymbolPropertyTable(int table_size) |
13195 | 671 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
2534 | 672 |
{ |
673 |
} |
|
13195 | 674 |
SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
2534 | 675 |
int number_of_entries) |
13195 | 676 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
2534 | 677 |
{ |
678 |
} |
|
679 |
||
680 |
||
681 |
SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
682 |
Symbol* sym, |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
683 |
intptr_t sym_mode) { |
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
684 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
2534 | 685 |
for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
686 |
if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
2534 | 687 |
return p; |
688 |
} |
|
689 |
} |
|
690 |
return NULL; |
|
691 |
} |
|
692 |
||
693 |
||
694 |
SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
695 |
Symbol* sym, intptr_t sym_mode) { |
2534 | 696 |
assert_locked_or_safepoint(SystemDictionary_lock); |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
697 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
698 |
assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
2534 | 699 |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
700 |
SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
13195 | 701 |
Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
2534 | 702 |
return p; |
703 |
} |
|
704 |
||
705 |
void SymbolPropertyTable::oops_do(OopClosure* f) { |
|
706 |
for (int index = 0; index < table_size(); index++) { |
|
707 |
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
|
708 |
if (p->method_type() != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
709 |
f->do_oop(p->method_type_addr()); |
2534 | 710 |
} |
711 |
} |
|
712 |
} |
|
713 |
} |
|
714 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
715 |
void SymbolPropertyTable::methods_do(void f(Method*)) { |
2534 | 716 |
for (int index = 0; index < table_size(); index++) { |
717 |
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
|
718 |
Method* prop = p->method(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
719 |
if (prop != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
720 |
f((Method*)prop); |
2534 | 721 |
} |
722 |
} |
|
723 |
} |
|
724 |
} |
|
725 |
||
1 | 726 |
|
727 |
// ---------------------------------------------------------------------------- |
|
728 |
||
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
729 |
void Dictionary::print(bool details) { |
1 | 730 |
ResourceMark rm; |
731 |
HandleMark hm; |
|
732 |
||
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
733 |
if (details) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
734 |
tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
735 |
table_size(), number_of_entries()); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
736 |
tty->print_cr("^ indicates that initiating loader is different from " |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
737 |
"defining loader"); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
738 |
} |
1 | 739 |
|
740 |
for (int index = 0; index < table_size(); index++) { |
|
741 |
for (DictionaryEntry* probe = bucket(index); |
|
742 |
probe != NULL; |
|
743 |
probe = probe->next()) { |
|
744 |
if (Verbose) tty->print("%4d: ", index); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
745 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
746 |
ClassLoaderData* loader_data = probe->loader_data(); |
1 | 747 |
bool is_defining_class = |
33602 | 748 |
(loader_data == e->class_loader_data()); |
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
749 |
tty->print("%s%s", ((!details) || is_defining_class) ? " " : "^", |
14488 | 750 |
e->external_name()); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
751 |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
752 |
if (details) { |
1 | 753 |
tty->print(", loader "); |
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
754 |
if (loader_data != NULL) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
755 |
loader_data->print_value(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
756 |
} else { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
757 |
tty->print("NULL"); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
758 |
} |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
759 |
} |
1 | 760 |
tty->cr(); |
761 |
} |
|
762 |
} |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
763 |
|
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
764 |
if (details) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
765 |
tty->cr(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
766 |
_pd_cache_table->print(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
767 |
} |
20405 | 768 |
tty->cr(); |
1 | 769 |
} |
770 |
||
771 |
void Dictionary::verify() { |
|
772 |
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
|
773 |
|
1 | 774 |
int element_count = 0; |
775 |
for (int index = 0; index < table_size(); index++) { |
|
776 |
for (DictionaryEntry* probe = bucket(index); |
|
777 |
probe != NULL; |
|
778 |
probe = probe->next()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
779 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
780 |
ClassLoaderData* loader_data = probe->loader_data(); |
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33602
diff
changeset
|
781 |
guarantee(e->is_instance_klass(), |
1 | 782 |
"Verify of system dictionary failed"); |
783 |
// class loader must be present; a null class loader is the |
|
784 |
// boostrap loader |
|
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
785 |
guarantee(loader_data != NULL || DumpSharedSpaces || |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
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parents:
14488
diff
changeset
|
786 |
loader_data->class_loader() == NULL || |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
787 |
loader_data->class_loader()->is_instance(), |
1 | 788 |
"checking type of class_loader"); |
22794
f1c014ad3754
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
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parents:
20408
diff
changeset
|
789 |
e->verify(); |
1 | 790 |
probe->verify_protection_domain_set(); |
791 |
element_count++; |
|
792 |
} |
|
793 |
} |
|
794 |
guarantee(number_of_entries() == element_count, |
|
795 |
"Verify of system dictionary failed"); |
|
796 |
debug_only(verify_lookup_length((double)number_of_entries() / table_size())); |
|
20405 | 797 |
|
798 |
_pd_cache_table->verify(); |
|
1 | 799 |
} |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
800 |