1 /*
2 * Copyright (c) 2000, 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 package sun.jvm.hotspot.runtime;
26
27 import java.util.Observer;
28 import sun.jvm.hotspot.types.TypeDataBase;
29
30
31 /** Encapsulates the BasicType enum in globalDefinitions.hpp in the
32 VM. */
33
34 public class BasicType {
35 private static int tBoolean;
36 private static int tChar;
37 private static int tFloat;
38 private static int tDouble;
39 private static int tByte;
40 private static int tShort;
41 private static int tInt;
42 private static int tLong;
43 private static int tObject;
44 private static int tArray;
45 private static int tVoid;
46 private static int tAddress;
47 private static int tNarrowOop;
48 private static int tMetadata;
49 private static int tNarrowKlass;
50 private static int tConflict;
51 private static int tIllegal;
52
53 public static BasicType T_BOOLEAN;
54 public static BasicType T_CHAR;
55 public static BasicType T_FLOAT;
56 public static BasicType T_DOUBLE;
57 public static BasicType T_BYTE;
58 public static BasicType T_SHORT;
59 public static BasicType T_INT;
60 public static BasicType T_LONG;
61 public static BasicType T_OBJECT;
62 public static BasicType T_ARRAY;
63 public static BasicType T_VOID;
64 public static BasicType T_ADDRESS;
65 public static BasicType T_NARROWOOP;
66 public static BasicType T_METADATA;
67 public static BasicType T_NARROWKLASS;
68 public static BasicType T_CONFLICT;
69 public static BasicType T_ILLEGAL;
70
71 static {
72 VM.registerVMInitializedObserver(
73 (o, d) -> initialize(VM.getVM().getTypeDataBase()));
74 }
75
76 private static synchronized void initialize(TypeDataBase db) {
77 tBoolean = db.lookupIntConstant("T_BOOLEAN").intValue();
78 tChar = db.lookupIntConstant("T_CHAR").intValue();
79 tFloat = db.lookupIntConstant("T_FLOAT").intValue();
80 tDouble = db.lookupIntConstant("T_DOUBLE").intValue();
81 tByte = db.lookupIntConstant("T_BYTE").intValue();
82 tShort = db.lookupIntConstant("T_SHORT").intValue();
83 tInt = db.lookupIntConstant("T_INT").intValue();
84 tLong = db.lookupIntConstant("T_LONG").intValue();
85 tObject = db.lookupIntConstant("T_OBJECT").intValue();
86 tArray = db.lookupIntConstant("T_ARRAY").intValue();
87 tVoid = db.lookupIntConstant("T_VOID").intValue();
88 tAddress = db.lookupIntConstant("T_ADDRESS").intValue();
89 tNarrowOop = db.lookupIntConstant("T_NARROWOOP").intValue();
90 tMetadata = db.lookupIntConstant("T_METADATA").intValue();
91 tNarrowKlass = db.lookupIntConstant("T_NARROWKLASS").intValue();
92 tConflict = db.lookupIntConstant("T_CONFLICT").intValue();
93 tIllegal = db.lookupIntConstant("T_ILLEGAL").intValue();
94
95 T_BOOLEAN = new BasicType(tBoolean);
96 T_CHAR = new BasicType(tChar);
97 T_FLOAT = new BasicType(tFloat);
98 T_DOUBLE = new BasicType(tDouble);
99 T_BYTE = new BasicType(tByte);
100 T_SHORT = new BasicType(tShort);
101 T_INT = new BasicType(tInt);
102 T_LONG = new BasicType(tLong);
103 T_OBJECT = new BasicType(tObject);
104 T_ARRAY = new BasicType(tArray);
105 T_VOID = new BasicType(tVoid);
106 T_ADDRESS = new BasicType(tAddress);
107 T_NARROWOOP = new BasicType(tNarrowOop);
108 T_METADATA = new BasicType(tMetadata);
109 T_NARROWKLASS = new BasicType(tNarrowKlass);
110 T_CONFLICT = new BasicType(tConflict);
111 T_ILLEGAL = new BasicType(tIllegal);
112 }
113
114 public static int getTBoolean() {
115 return tBoolean;
116 }
117
118 public static int getTChar() {
119 return tChar;
120 }
121
122 public static int getTFloat() {
123 return tFloat;
124 }
125
126 public static int getTDouble() {
127 return tDouble;
128 }
129
130 public static int getTByte() {
131 return tByte;
132 }
133
134 public static int getTShort() {
135 return tShort;
136 }
137
138 public static int getTInt() {
139 return tInt;
140 }
141
142 public static int getTLong() {
143 return tLong;
144 }
145
146 public static int getTObject() {
147 return tObject;
148 }
149
150 public static int getTArray() {
151 return tArray;
152 }
153
154 public static int getTVoid() {
155 return tVoid;
156 }
157
158 public static int getTAddress() {
159 return tAddress;
160 }
161
162 public static int getTNarrowOop() {
163 return tNarrowOop;
164 }
165
166 public static int getTMetadata() {
167 return tMetadata;
168 }
169
170 public static int getTNarrowKlass() {
171 return tNarrowKlass;
172 }
173
174 /** For stack value type with conflicting contents */
175 public static int getTConflict() {
176 return tConflict;
177 }
178
179 public static int getTIllegal() {
180 return tIllegal;
181 }
182
183 public static BasicType intToBasicType(int i) {
184 if (i == tBoolean) {
185 return T_BOOLEAN;
186 } else if (i == tChar) {
187 return T_CHAR;
188 } else if (i == tFloat) {
189 return T_FLOAT;
190 } else if (i == tDouble) {
191 return T_DOUBLE;
192 } else if (i == tByte) {
193 return T_BYTE;
194 } else if (i == tShort) {
195 return T_SHORT;
196 } else if (i == tInt) {
197 return T_INT;
198 } else if (i == tLong) {
199 return T_LONG;
200 } else if (i == tObject) {
201 return T_OBJECT;
202 } else if (i == tArray) {
203 return T_ARRAY;
204 } else if (i == tVoid) {
205 return T_VOID;
206 } else if (i == tAddress) {
207 return T_ADDRESS;
208 } else if (i == tNarrowOop) {
209 return T_NARROWOOP;
210 } else if (i == tMetadata) {
211 return T_METADATA;
212 } else if (i == tNarrowKlass) {
213 return T_NARROWKLASS;
214 } else {
215 return T_ILLEGAL;
216 }
217 }
218
219 public static BasicType charToBasicType(char c) {
220 switch( c ) {
221 case 'B': return T_BYTE;
222 case 'C': return T_CHAR;
223 case 'D': return T_DOUBLE;
224 case 'F': return T_FLOAT;
225 case 'I': return T_INT;
226 case 'J': return T_LONG;
227 case 'S': return T_SHORT;
228 case 'Z': return T_BOOLEAN;
229 case 'V': return T_VOID;
230 case 'L': return T_OBJECT;
231 case '[': return T_ARRAY;
232 }
233 return T_ILLEGAL;
234 }
235
236 public static int charToType(char c) {
237 return charToBasicType(c).getType();
238 }
239
240 public int getType() {
241 return type;
242 }
243
244 public String getName() {
245 if (type == tBoolean) {
246 return "boolean";
247 } else if (type == tChar) {
248 return "char";
249 } else if (type == tFloat) {
250 return "float";
251 } else if (type == tDouble) {
252 return "double";
253 } else if (type == tByte) {
254 return "byte";
255 } else if (type == tShort) {
256 return "short";
257 } else if (type == tInt) {
258 return "int";
259 } else if (type == tLong) {
260 return "long";
261 } else if (type == tObject) {
262 return "object";
263 } else if (type == tArray) {
264 return "array";
265 } else if (type == tVoid) {
266 return "void";
267 } else if (type == tAddress) {
268 return "address";
269 } else if (type == tNarrowOop) {
270 return "narrow oop";
271 } else if (type == tMetadata) {
272 return "metadata";
273 } else if (type == tNarrowKlass) {
274 return "narrow klass";
275 } else if (type == tConflict) {
276 return "conflict";
277 } else {
278 return "ILLEGAL TYPE";
279 }
280 }
281
282 //-- Internals only below this point
283 private BasicType(int type) {
284 this.type = type;
285 }
286
287 private int type;
288 }