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annotate src/share/vm/runtime/reflectionUtils.cpp @ 18096:ca6d25be853b jdk8u25-b13

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8044269: Analysis of archive files. Summary: Add checksum verification. Reviewed-by: iklam, dholmes, mschoene
author jiangli
date Tue, 12 Aug 2014 17:46:16 -0400
parents ac9cb1d5a202
children 096c224171c4
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1 /*
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/javaClasses.hpp"
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27 #include "memory/universe.inline.hpp"
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28 #include "runtime/reflectionUtils.hpp"
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29
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30 KlassStream::KlassStream(instanceKlassHandle klass, bool local_only,
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31 bool classes_only, bool walk_defaults) {
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32 _klass = _base_klass = klass;
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33 _base_class_search_defaults = false;
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34 _defaults_checked = false;
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35 if (classes_only) {
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36 _interfaces = Universe::the_empty_klass_array();
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37 } else {
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38 _interfaces = klass->transitive_interfaces();
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39 }
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40 _interface_index = _interfaces->length();
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41 _local_only = local_only;
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42 _classes_only = classes_only;
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43 _walk_defaults = walk_defaults;
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44 }
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45
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46 bool KlassStream::eos() {
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47 if (index() >= 0) return false;
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48 if (_local_only) return true;
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49 if (!_klass->is_interface() && _klass->super() != NULL) {
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50 // go up superclass chain (not for interfaces)
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51 _klass = _klass->super();
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52 // Next for method walks, walk default methods
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53 } else if (_walk_defaults && (_defaults_checked == false) && (_base_klass->default_methods() != NULL)) {
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54 _base_class_search_defaults = true;
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55 _klass = _base_klass;
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56 _defaults_checked = true;
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57 } else {
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58 // Next walk transitive interfaces
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59 if (_interface_index > 0) {
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60 _klass = _interfaces->at(--_interface_index);
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61 } else {
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62 return true;
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63 }
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64 }
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65 _index = length();
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66 next();
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67 return eos();
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68 }
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71 GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields =
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72 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<FilteredField*>(3,true);
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75 void FilteredFieldsMap::initialize() {
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76 int offset;
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77 offset = java_lang_Throwable::get_backtrace_offset();
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78 _filtered_fields->append(new FilteredField(SystemDictionary::Throwable_klass(), offset));
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79 // The latest version of vm may be used with old jdk.
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80 if (JDK_Version::is_gte_jdk16x_version()) {
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81 // The following class fields do not exist in
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82 // previous version of jdk.
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83 offset = sun_reflect_ConstantPool::oop_offset();
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84 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_ConstantPool_klass(), offset));
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85 offset = sun_reflect_UnsafeStaticFieldAccessorImpl::base_offset();
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86 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(), offset));
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87 }
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88 }
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90 int FilteredFieldStream::field_count() {
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91 int numflds = 0;
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92 for (;!eos(); next()) {
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93 numflds++;
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94 }
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95 return numflds;
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96 }