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comparison src/share/vm/runtime/reflectionUtils.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 4ce7240d622c
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1999-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_reflectionUtils.cpp.incl"
27
28 KlassStream::KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only) {
29 _klass = klass;
30 if (classes_only) {
31 _interfaces = Universe::the_empty_system_obj_array();
32 } else {
33 _interfaces = klass->transitive_interfaces();
34 }
35 _interface_index = _interfaces->length();
36 _local_only = local_only;
37 _classes_only = classes_only;
38 }
39
40 bool KlassStream::eos() {
41 if (index() >= 0) return false;
42 if (_local_only) return true;
43 if (!_klass->is_interface() && _klass->super() != NULL) {
44 // go up superclass chain (not for interfaces)
45 _klass = _klass->super();
46 } else {
47 if (_interface_index > 0) {
48 _klass = klassOop(_interfaces->obj_at(--_interface_index));
49 } else {
50 return true;
51 }
52 }
53 _index = length();
54 next();
55 return eos();
56 }
57
58
59 GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields =
60 new (ResourceObj::C_HEAP) GrowableArray<FilteredField*>(3,true);
61
62
63 void FilteredFieldsMap::initialize() {
64 int offset;
65 offset = java_lang_Throwable::get_backtrace_offset();
66 _filtered_fields->append(new FilteredField(SystemDictionary::throwable_klass(), offset));
67 // The latest version of vm may be used with old jdk.
68 if (JDK_Version::is_gte_jdk16x_version()) {
69 // The following class fields do not exist in
70 // previous version of jdk.
71 offset = sun_reflect_ConstantPool::cp_oop_offset();
72 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_constant_pool_klass(), offset));
73 offset = sun_reflect_UnsafeStaticFieldAccessorImpl::base_offset();
74 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(), offset));
75 }
76 }
77
78 int FilteredFieldStream::field_count() {
79 int numflds = 0;
80 for (;!eos(); next()) {
81 numflds++;
82 }
83 return numflds;
84 }