1 /* 2 * Copyright (c) 2011, 2015, 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 40 int InstanceMirrorKlass::_offset_of_static_fields = 0; 41 42 int InstanceMirrorKlass::instance_size(KlassHandle 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 49 instanceOop InstanceMirrorKlass::allocate_instance(KlassHandle k, TRAPS) { 50 // Query before forming handle. 51 int size = instance_size(k); 52 KlassHandle h_k(THREAD, this); 53 int field_offset = java_lang_Class::oop_size_offset(); 54 55 assert(field_offset != 0, "must be set"); 56 assert(size > 0, "total object size must be positive: %d", size); 57 58 instanceOop i = (instanceOop)CollectedHeap::class_allocate(h_k, size, field_offset, CHECK_NULL); 59 // oop_size is set by class_allocate() before the header is set. 60 return i; 61 } 62 63 int InstanceMirrorKlass::oop_size(oop obj) const { 64 return java_lang_Class::oop_size(obj); 65 } 66 67 int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) { 68 Klass* k = java_lang_Class::as_Klass(obj); 69 if (k != NULL && k->is_instance_klass()) { 70 return InstanceKlass::cast(k)->static_oop_field_count(); 71 } 72 return 0; 73 }