1 /*
2 * Copyright (c) 1997, 2009, 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 "incls/_precompiled.incl"
26 #include "incls/_fieldDescriptor.cpp.incl"
27
28
29 oop fieldDescriptor::loader() const {
30 return instanceKlass::cast(_cp->pool_holder())->class_loader();
31 }
32
33 typeArrayOop fieldDescriptor::annotations() const {
34 instanceKlass* ik = instanceKlass::cast(field_holder());
35 objArrayOop md = ik->fields_annotations();
36 if (md == NULL)
37 return NULL;
38 assert((index() % instanceKlass::next_offset) == 0, "");
39 return typeArrayOop(md->obj_at(index() / instanceKlass::next_offset));
40 }
41
42 constantTag fieldDescriptor::initial_value_tag() const {
43 return constants()->tag_at(_initial_value_index);
44 }
45
46 jint fieldDescriptor::int_initial_value() const {
47 return constants()->int_at(_initial_value_index);
48 }
49
50 jlong fieldDescriptor::long_initial_value() const {
51 return constants()->long_at(_initial_value_index);
52 }
53
54 jfloat fieldDescriptor::float_initial_value() const {
55 return constants()->float_at(_initial_value_index);
56 }
57
58 jdouble fieldDescriptor::double_initial_value() const {
59 return constants()->double_at(_initial_value_index);
60 }
61
62 oop fieldDescriptor::string_initial_value(TRAPS) const {
63 return constants()->string_at(_initial_value_index, CHECK_0);
64 }
65
66 void fieldDescriptor::initialize(klassOop k, int index) {
67 instanceKlass* ik = instanceKlass::cast(k);
68 _cp = ik->constants();
69 typeArrayOop fields = ik->fields();
70
71 assert(fields->length() % instanceKlass::next_offset == 0, "Illegal size of field array");
72 assert(fields->length() >= index + instanceKlass::next_offset, "Illegal size of field array");
73
74 _access_flags.set_field_flags(fields->ushort_at(index + instanceKlass::access_flags_offset));
75 _name_index = fields->ushort_at(index + instanceKlass::name_index_offset);
76 _signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);
77 _initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);
78 guarantee(_name_index != 0 && _signature_index != 0, "bad constant pool index for fieldDescriptor");
79 _offset = ik->offset_from_fields( index );
80 _generic_signature_index = fields->ushort_at(index + instanceKlass::generic_signature_offset);
81 _index = index;
82 }
83
84 #ifndef PRODUCT
85
86 void fieldDescriptor::print_on(outputStream* st) const {
87 _access_flags.print_on(st);
88 constants()->symbol_at(_name_index)->print_value_on(st);
89 st->print(" ");
90 constants()->symbol_at(_signature_index)->print_value_on(st);
91 st->print(" @%d ", offset());
92 if (WizardMode && has_initial_value()) {
93 st->print("(initval ");
94 constantTag t = initial_value_tag();
95 if (t.is_int()) {
96 st->print("int %d)", int_initial_value());
97 } else if (t.is_long()){
98 st->print_jlong(long_initial_value());
99 } else if (t.is_float()){
100 st->print("float %f)", float_initial_value());
101 } else if (t.is_double()){
102 st->print("double %lf)", double_initial_value());
103 }
104 }
105 }
106
107 void fieldDescriptor::print_on_for(outputStream* st, oop obj) {
108 print_on(st);
109 BasicType ft = field_type();
110 jint as_int = 0;
111 switch (ft) {
112 case T_BYTE:
113 as_int = (jint)obj->byte_field(offset());
114 st->print(" %d", obj->byte_field(offset()));
115 break;
116 case T_CHAR:
117 as_int = (jint)obj->char_field(offset());
118 {
119 jchar c = obj->char_field(offset());
120 as_int = c;
121 st->print(" %c %d", isprint(c) ? c : ' ', c);
122 }
123 break;
124 case T_DOUBLE:
125 st->print(" %lf", obj->double_field(offset()));
126 break;
127 case T_FLOAT:
128 as_int = obj->int_field(offset());
129 st->print(" %f", obj->float_field(offset()));
130 break;
131 case T_INT:
132 as_int = obj->int_field(offset());
133 st->print(" %d", obj->int_field(offset()));
134 break;
135 case T_LONG:
136 st->print(" ");
137 st->print_jlong(obj->long_field(offset()));
138 break;
139 case T_SHORT:
140 as_int = obj->short_field(offset());
141 st->print(" %d", obj->short_field(offset()));
142 break;
143 case T_BOOLEAN:
144 as_int = obj->bool_field(offset());
145 st->print(" %s", obj->bool_field(offset()) ? "true" : "false");
146 break;
147 case T_ARRAY:
148 st->print(" ");
149 NOT_LP64(as_int = obj->int_field(offset()));
150 obj->obj_field(offset())->print_value_on(st);
151 break;
152 case T_OBJECT:
153 st->print(" ");
154 NOT_LP64(as_int = obj->int_field(offset()));
155 obj->obj_field(offset())->print_value_on(st);
156 break;
157 default:
158 ShouldNotReachHere();
159 break;
160 }
161 // Print a hint as to the underlying integer representation. This can be wrong for
162 // pointers on an LP64 machine
163 if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) {
164 st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint)));
165 } else if (as_int < 0 || as_int > 9) {
166 st->print(" (%x)", as_int);
167 }
168 }
169
170 #endif /* PRODUCT */