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 }