1 /*
2 * Copyright (c) 1999, 2018, 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 "memory/universe.hpp"
28 #include "runtime/reflectionUtils.hpp"
29
KlassStream(InstanceKlass * klass,bool local_only,bool classes_only,bool walk_defaults)30 KlassStream::KlassStream(InstanceKlass* klass, bool local_only,
31 bool classes_only, bool walk_defaults) {
32 _klass = _base_klass = klass;
33 _base_class_search_defaults = false;
34 _defaults_checked = false;
35 if (classes_only) {
36 _interfaces = Universe::the_empty_instance_klass_array();
37 } else {
38 _interfaces = klass->transitive_interfaces();
39 }
40 _interface_index = _interfaces->length();
41 _local_only = local_only;
42 _classes_only = classes_only;
43 _walk_defaults = walk_defaults;
44 }
45
eos()46 bool KlassStream::eos() {
47 if (index() >= 0) return false;
48 if (_local_only) return true;
49 if (!_klass->is_interface() && _klass->super() != NULL) {
50 // go up superclass chain (not for interfaces)
51 _klass = _klass->java_super();
52 // Next for method walks, walk default methods
53 } else if (_walk_defaults && (_defaults_checked == false) && (_base_klass->default_methods() != NULL)) {
54 _base_class_search_defaults = true;
55 _klass = _base_klass;
56 _defaults_checked = true;
57 } else {
58 // Next walk transitive interfaces
59 if (_interface_index > 0) {
60 _klass = _interfaces->at(--_interface_index);
61 } else {
62 return true;
63 }
64 }
65 _index = length();
66 next();
67 return eos();
68 }
69
70
71 GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields =
72 new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<FilteredField*>(3, mtServiceability);
73
74
initialize()75 void FilteredFieldsMap::initialize() {
76 int offset = reflect_ConstantPool::oop_offset();
77 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_ConstantPool_klass(), offset));
78 offset = reflect_UnsafeStaticFieldAccessorImpl::base_offset();
79 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(), offset));
80 }
81
field_count()82 int FilteredFieldStream::field_count() {
83 int numflds = 0;
84 for (;!eos(); next()) {
85 numflds++;
86 }
87 return numflds;
88 }
89