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1 /*
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2 * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 #include "incls/_fieldDescriptor.cpp.incl"
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27
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28
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29 oop fieldDescriptor::loader() const {
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30 return instanceKlass::cast(_cp->pool_holder())->class_loader();
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31 }
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32
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33 typeArrayOop fieldDescriptor::annotations() const {
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34 instanceKlass* ik = instanceKlass::cast(field_holder());
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35 objArrayOop md = ik->fields_annotations();
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36 if (md == NULL)
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37 return NULL;
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38 assert((index() % instanceKlass::next_offset) == 0, "");
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39 return typeArrayOop(md->obj_at(index() / instanceKlass::next_offset));
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40 }
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41
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42 constantTag fieldDescriptor::initial_value_tag() const {
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43 return constants()->tag_at(_initial_value_index);
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44 }
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45
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46 jint fieldDescriptor::int_initial_value() const {
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47 return constants()->int_at(_initial_value_index);
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48 }
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49
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50 jlong fieldDescriptor::long_initial_value() const {
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51 return constants()->long_at(_initial_value_index);
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52 }
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53
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54 jfloat fieldDescriptor::float_initial_value() const {
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55 return constants()->float_at(_initial_value_index);
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56 }
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57
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58 jdouble fieldDescriptor::double_initial_value() const {
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59 return constants()->double_at(_initial_value_index);
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60 }
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61
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62 oop fieldDescriptor::string_initial_value(TRAPS) const {
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63 return constants()->string_at(_initial_value_index, CHECK_0);
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64 }
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65
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66 void fieldDescriptor::initialize(klassOop k, int index) {
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67 instanceKlass* ik = instanceKlass::cast(k);
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68 _cp = ik->constants();
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69 typeArrayOop fields = ik->fields();
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70
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71 assert(fields->length() % instanceKlass::next_offset == 0, "Illegal size of field array");
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72 assert(fields->length() >= index + instanceKlass::next_offset, "Illegal size of field array");
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73
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74 _access_flags.set_field_flags(fields->ushort_at(index + instanceKlass::access_flags_offset));
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75 _name_index = fields->ushort_at(index + instanceKlass::name_index_offset);
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76 _signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);
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77 _initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);
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78 guarantee(_name_index != 0 && _signature_index != 0, "bad constant pool index for fieldDescriptor");
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79 _offset = ik->offset_from_fields( index );
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80 _generic_signature_index = fields->ushort_at(index + instanceKlass::generic_signature_offset);
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81 _index = index;
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82 }
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83
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84 #ifndef PRODUCT
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85
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86 void fieldDescriptor::print_on(outputStream* st) const {
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87 _access_flags.print_on(st);
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88 constants()->symbol_at(_name_index)->print_value_on(st);
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89 st->print(" ");
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90 constants()->symbol_at(_signature_index)->print_value_on(st);
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91 st->print(" @%d ", offset());
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92 if (WizardMode && has_initial_value()) {
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93 st->print("(initval ");
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94 constantTag t = initial_value_tag();
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95 if (t.is_int()) {
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96 st->print("int %d)", int_initial_value());
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97 } else if (t.is_long()){
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98 st->print_jlong(long_initial_value());
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99 } else if (t.is_float()){
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100 st->print("float %f)", float_initial_value());
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101 } else if (t.is_double()){
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102 st->print("double %lf)", double_initial_value());
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103 }
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104 }
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105 }
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106
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107 void fieldDescriptor::print_on_for(outputStream* st, oop obj) {
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108 print_on(st);
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109 BasicType ft = field_type();
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110 jint as_int;
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111 switch (ft) {
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112 case T_BYTE:
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113 as_int = (jint)obj->byte_field(offset());
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114 st->print(" %d", obj->byte_field(offset()));
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115 break;
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116 case T_CHAR:
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117 {
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118 jchar c = obj->char_field(offset());
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119 as_int = c;
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120 st->print(" %c %d", isprint(c) ? c : ' ', c);
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121 }
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122 break;
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123 case T_DOUBLE:
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124 st->print(" %lf", obj->double_field(offset()));
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125 break;
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126 case T_FLOAT:
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127 as_int = obj->int_field(offset());
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128 st->print(" %f", obj->float_field(offset()));
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129 break;
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130 case T_INT:
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131 st->print(" %d", obj->int_field(offset()));
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132 break;
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133 case T_LONG:
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134 st->print(" ");
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135 st->print_jlong(obj->long_field(offset()));
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136 break;
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137 case T_SHORT:
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138 as_int = obj->short_field(offset());
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139 st->print(" %d", obj->short_field(offset()));
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140 break;
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141 case T_BOOLEAN:
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142 as_int = obj->bool_field(offset());
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143 st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
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144 break;
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145 case T_ARRAY:
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146 st->print(" ");
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147 as_int = obj->int_field(offset());
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148 obj->obj_field(offset())->print_value_on(st);
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149 break;
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150 case T_OBJECT:
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151 st->print(" ");
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152 as_int = obj->int_field(offset());
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153 obj->obj_field(offset())->print_value_on(st);
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154 break;
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155 default:
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156 ShouldNotReachHere();
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157 break;
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158 }
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159 // Print a hint as to the underlying integer representation. This can be wrong for
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160 // pointers on an LP64 machine
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161 if (ft == T_LONG || ft == T_DOUBLE) {
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162 st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
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163 } else {
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164 st->print(" (%x)", as_int);
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165 }
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166 }
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167
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168 #endif /* PRODUCT */
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