1 /*
2 * Copyright (c) 1997, 2017, 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 "precompiled.hpp"
26 #include "utilities/constantTag.hpp"
27 #include "utilities/ostream.hpp"
28
29 #ifndef PRODUCT
30
31 void constantTag::print_on(outputStream* st) const {
32 st->print("%s", internal_name());
33 }
34
35 #endif // PRODUCT
36
37 BasicType constantTag::basic_type() const {
38 switch (_tag) {
39 case JVM_CONSTANT_Integer :
40 return T_INT;
41 case JVM_CONSTANT_Float :
42 return T_FLOAT;
43 case JVM_CONSTANT_Long :
44 return T_LONG;
45 case JVM_CONSTANT_Double :
46 return T_DOUBLE;
47
48 case JVM_CONSTANT_Class :
49 case JVM_CONSTANT_String :
50 case JVM_CONSTANT_UnresolvedClass :
51 case JVM_CONSTANT_UnresolvedClassInError :
52 case JVM_CONSTANT_ClassIndex :
53 case JVM_CONSTANT_StringIndex :
54 case JVM_CONSTANT_MethodHandle :
55 case JVM_CONSTANT_MethodHandleInError :
56 case JVM_CONSTANT_MethodType :
57 case JVM_CONSTANT_MethodTypeInError :
58 return T_OBJECT;
59
60 case JVM_CONSTANT_Dynamic :
61 case JVM_CONSTANT_DynamicInError :
62 assert(false, "Dynamic constant has no fixed basic type");
63
64 default:
65 ShouldNotReachHere();
66 return T_ILLEGAL;
67 }
68 }
69
70
71 // value as specified in the classfile format
72 jbyte constantTag::classfile_value() const {
73 switch (_tag) {
74 case JVM_CONSTANT_ClassIndex:
75 case JVM_CONSTANT_UnresolvedClass:
76 case JVM_CONSTANT_UnresolvedClassInError:
77 return JVM_CONSTANT_Class;
78 case JVM_CONSTANT_StringIndex:
79 return JVM_CONSTANT_String;
80 case JVM_CONSTANT_MethodHandleInError:
81 return JVM_CONSTANT_MethodHandle;
82 case JVM_CONSTANT_MethodTypeInError:
83 return JVM_CONSTANT_MethodType;
84 case JVM_CONSTANT_DynamicInError:
85 return JVM_CONSTANT_Dynamic;
86 default:
87 // Return a zero tag for a gap after Long or Double,
88 // even though that doesn't exactly appear in a classfile.
89 assert(_tag >= 0 && _tag <= JVM_CONSTANT_ExternalMax,
90 "cannot interpret tag %d as a standard classfile tag", _tag);
91 return _tag;
92 }
93 }
94
95
96 jbyte constantTag::non_error_value() const {
97 switch (_tag) {
98 case JVM_CONSTANT_UnresolvedClassInError:
99 return JVM_CONSTANT_UnresolvedClass;
100 case JVM_CONSTANT_MethodHandleInError:
101 return JVM_CONSTANT_MethodHandle;
102 case JVM_CONSTANT_MethodTypeInError:
103 return JVM_CONSTANT_MethodType;
104 case JVM_CONSTANT_DynamicInError:
105 return JVM_CONSTANT_Dynamic;
106 default:
107 return _tag;
108 }
109 }
110
111
112 jbyte constantTag::error_value() const {
113 switch (_tag) {
114 case JVM_CONSTANT_UnresolvedClass:
115 return JVM_CONSTANT_UnresolvedClassInError;
116 case JVM_CONSTANT_MethodHandle:
117 return JVM_CONSTANT_MethodHandleInError;
118 case JVM_CONSTANT_MethodType:
119 return JVM_CONSTANT_MethodTypeInError;
120 case JVM_CONSTANT_Dynamic:
121 return JVM_CONSTANT_DynamicInError;
122 default:
123 ShouldNotReachHere();
124 return JVM_CONSTANT_Invalid;
125 }
126 }
127
128 const char* constantTag::internal_name() const {
129 switch (_tag) {
130 case JVM_CONSTANT_Invalid :
131 return "Invalid index";
132 case JVM_CONSTANT_Class :
133 return "Class";
134 case JVM_CONSTANT_Fieldref :
135 return "Field";
136 case JVM_CONSTANT_Methodref :
137 return "Method";
138 case JVM_CONSTANT_InterfaceMethodref :
139 return "InterfaceMethod";
140 case JVM_CONSTANT_String :
141 return "String";
142 case JVM_CONSTANT_Integer :
143 return "Integer";
144 case JVM_CONSTANT_Float :
145 return "Float";
146 case JVM_CONSTANT_Long :
147 return "Long";
148 case JVM_CONSTANT_Double :
149 return "Double";
150 case JVM_CONSTANT_NameAndType :
151 return "NameAndType";
152 case JVM_CONSTANT_MethodHandle :
153 return "MethodHandle";
154 case JVM_CONSTANT_MethodHandleInError :
155 return "MethodHandle Error";
156 case JVM_CONSTANT_MethodType :
157 return "MethodType";
158 case JVM_CONSTANT_MethodTypeInError :
159 return "MethodType Error";
160 case JVM_CONSTANT_Dynamic :
161 return "Dynamic";
162 case JVM_CONSTANT_DynamicInError :
163 return "Dynamic Error";
164 case JVM_CONSTANT_InvokeDynamic :
165 return "InvokeDynamic";
166 case JVM_CONSTANT_Utf8 :
167 return "Utf8";
168 case JVM_CONSTANT_UnresolvedClass :
169 return "Unresolved Class";
170 case JVM_CONSTANT_UnresolvedClassInError :
171 return "Unresolved Class Error";
172 case JVM_CONSTANT_ClassIndex :
173 return "Unresolved Class Index";
174 case JVM_CONSTANT_StringIndex :
175 return "Unresolved String Index";
176 default:
177 ShouldNotReachHere();
178 return "Illegal";
179 }
180 }