1/* 2 * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/javaClasses.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "gc/shared/collectedHeap.inline.hpp" 29#include "gc/shared/specialized_oop_closures.hpp" 30#include "memory/iterator.inline.hpp" 31#include "memory/oopFactory.hpp" 32#include "oops/instanceKlass.hpp" 33#include "oops/instanceMirrorKlass.hpp" 34#include "oops/instanceOop.hpp" 35#include "oops/oop.inline.hpp" 36#include "oops/symbol.hpp" 37#include "runtime/handles.inline.hpp" 38#include "utilities/macros.hpp" 39 40int InstanceMirrorKlass::_offset_of_static_fields = 0; 41 42int InstanceMirrorKlass::instance_size(Klass* k) { 43 if (k != NULL && k->is_instance_klass()) { 44 return align_object_size(size_helper() + InstanceKlass::cast(k)->static_field_size()); 45 } 46 return size_helper(); 47} 48 49instanceOop InstanceMirrorKlass::allocate_instance(Klass* k, TRAPS) { 50 // Query before forming handle. 51 int size = instance_size(k); 52 assert(size > 0, "total object size must be positive: %d", size); 53 54 // Since mirrors can be variable sized because of the static fields, store 55 // the size in the mirror itself. 56 return (instanceOop)CollectedHeap::class_allocate(this, size, CHECK_NULL); 57} 58 59int InstanceMirrorKlass::oop_size(oop obj) const { 60 return java_lang_Class::oop_size(obj); 61} 62 63int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) { 64 Klass* k = java_lang_Class::as_Klass(obj); 65 if (k != NULL && k->is_instance_klass()) { 66 return InstanceKlass::cast(k)->static_oop_field_count(); 67 } 68 return 0; 69} 70