1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/instanceMirrorKlass.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,120 @@
1.4 +/*
1.5 + * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
1.29 +#define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
1.30 +
1.31 +#include "classfile/systemDictionary.hpp"
1.32 +#include "oops/instanceKlass.hpp"
1.33 +#include "runtime/handles.hpp"
1.34 +#include "utilities/macros.hpp"
1.35 +
1.36 +// An InstanceMirrorKlass is a specialized InstanceKlass for
1.37 +// java.lang.Class instances. These instances are special because
1.38 +// they contain the static fields of the class in addition to the
1.39 +// normal fields of Class. This means they are variable sized
1.40 +// instances and need special logic for computing their size and for
1.41 +// iteration of their oops.
1.42 +
1.43 +
1.44 +class InstanceMirrorKlass: public InstanceKlass {
1.45 + friend class VMStructs;
1.46 + friend class InstanceKlass;
1.47 +
1.48 + private:
1.49 + static int _offset_of_static_fields;
1.50 +
1.51 + // Constructor
1.52 + InstanceMirrorKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
1.53 + : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
1.54 +
1.55 + public:
1.56 + InstanceMirrorKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
1.57 + // Type testing
1.58 + bool oop_is_instanceMirror() const { return true; }
1.59 +
1.60 + // Casting from Klass*
1.61 + static InstanceMirrorKlass* cast(Klass* k) {
1.62 + assert(k->oop_is_instanceMirror(), "cast to InstanceMirrorKlass");
1.63 + return (InstanceMirrorKlass*) k;
1.64 + }
1.65 +
1.66 + // Returns the size of the instance including the extra static fields.
1.67 + virtual int oop_size(oop obj) const;
1.68 +
1.69 + // Static field offset is an offset into the Heap, should be converted by
1.70 + // based on UseCompressedOop for traversal
1.71 + static HeapWord* start_of_static_fields(oop obj) {
1.72 + return (HeapWord*)(cast_from_oop<intptr_t>(obj) + offset_of_static_fields());
1.73 + }
1.74 +
1.75 + static void init_offset_of_static_fields() {
1.76 + // Cache the offset of the static fields in the Class instance
1.77 + assert(_offset_of_static_fields == 0, "once");
1.78 + _offset_of_static_fields = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->size_helper() << LogHeapWordSize;
1.79 + }
1.80 +
1.81 + static int offset_of_static_fields() {
1.82 + return _offset_of_static_fields;
1.83 + }
1.84 +
1.85 + int compute_static_oop_field_count(oop obj);
1.86 +
1.87 + // Given a Klass return the size of the instance
1.88 + int instance_size(KlassHandle k);
1.89 +
1.90 + // allocation
1.91 + instanceOop allocate_instance(KlassHandle k, TRAPS);
1.92 +
1.93 + // Garbage collection
1.94 + int oop_adjust_pointers(oop obj);
1.95 + void oop_follow_contents(oop obj);
1.96 +
1.97 + // Parallel Scavenge and Parallel Old
1.98 + PARALLEL_GC_DECLS
1.99 +
1.100 + int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
1.101 + return oop_oop_iterate_v(obj, blk);
1.102 + }
1.103 + int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
1.104 + return oop_oop_iterate_v_m(obj, blk, mr);
1.105 + }
1.106 +
1.107 +#define InstanceMirrorKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
1.108 + int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
1.109 + int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
1.110 +
1.111 + ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
1.112 + ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
1.113 +
1.114 +#if INCLUDE_ALL_GCS
1.115 +#define InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
1.116 + int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
1.117 +
1.118 + ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
1.119 + ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
1.120 +#endif // INCLUDE_ALL_GCS
1.121 +};
1.122 +
1.123 +#endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
