author | jwilhelm |
Thu, 22 Jun 2017 00:51:07 +0200 | |
changeset 46554 | aa1cfd918c4f |
parent 46475 | 75902cea18af |
child 46701 | f559541c0daa |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2017, 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/protectionDomainCache.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "memory/iterator.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "utilities/hashtable.inline.hpp" |
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|
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unsigned int ProtectionDomainCacheTable::compute_hash(Handle protection_domain) { |
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// Identity hash can safepoint, so keep protection domain in a Handle. |
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return (unsigned int)(protection_domain->identity_hash()); |
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} |
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|
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int ProtectionDomainCacheTable::index_for(Handle protection_domain) { |
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return hash_to_index(compute_hash(protection_domain)); |
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} |
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|
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ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
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: Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) |
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{ |
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} |
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|
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void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { |
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assert(SafepointSynchronize::is_at_safepoint(), "must be"); |
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for (int i = 0; i < table_size(); ++i) { |
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ProtectionDomainCacheEntry** p = bucket_addr(i); |
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ProtectionDomainCacheEntry* entry = bucket(i); |
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while (entry != NULL) { |
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if (is_alive->do_object_b(entry->literal())) { |
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p = entry->next_addr(); |
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} else { |
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if (log_is_enabled(Debug, protectiondomain)) { |
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outputStream* log = Log(protectiondomain)::debug_stream(); |
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log->print("protection domain unlinked: "); |
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entry->literal()->print_value_on(log); |
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log->cr(); |
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} |
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*p = entry->next(); |
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free_entry(entry); |
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} |
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entry = *p; |
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} |
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} |
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} |
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void ProtectionDomainCacheTable::oops_do(OopClosure* f) { |
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for (int index = 0; index < table_size(); index++) { |
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for (ProtectionDomainCacheEntry* probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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probe->oops_do(f); |
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} |
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} |
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} |
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#ifndef PRODUCT |
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void ProtectionDomainCacheTable::print() { |
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tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", |
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table_size(), number_of_entries()); |
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for (int index = 0; index < table_size(); index++) { |
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for (ProtectionDomainCacheEntry* probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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probe->print(); |
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} |
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} |
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} |
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void ProtectionDomainCacheEntry::print() { |
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tty->print_cr("entry " PTR_FORMAT " value " PTR_FORMAT " next " PTR_FORMAT, |
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p2i(this), p2i(literal()), p2i(next())); |
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} |
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#endif |
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|
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void ProtectionDomainCacheTable::verify() { |
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verify_table<ProtectionDomainCacheEntry>("Protection Domain Table"); |
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} |
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void ProtectionDomainCacheEntry::verify() { |
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guarantee(literal()->is_oop(), "must be an oop"); |
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} |
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ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(Handle protection_domain) { |
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unsigned int hash = compute_hash(protection_domain); |
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int index = hash_to_index(hash); |
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|
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ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); |
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if (entry == NULL) { |
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entry = add_entry(index, hash, protection_domain); |
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} |
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return entry; |
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} |
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|
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ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, Handle protection_domain) { |
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for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { |
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if (e->protection_domain() == protection_domain()) { |
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return e; |
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} |
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} |
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|
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return NULL; |
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} |
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|
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ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, Handle protection_domain) { |
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assert_locked_or_safepoint(SystemDictionary_lock); |
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assert(index == index_for(protection_domain), "incorrect index?"); |
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assert(find_entry(index, protection_domain) == NULL, "no double entry"); |
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|
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ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); |
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Hashtable<oop, mtClass>::add_entry(index, p); |
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return p; |
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coleenp
parents:
diff
changeset
|
136 |
} |