1 /*
2 * Copyright (c) 1998, 2020, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.jdi;
27
28 import java.util.ArrayList;
29 import java.util.List;
30
31 public class JNITypeParser {
32
33 static final char SIGNATURE_ENDCLASS = ';';
34 static final char SIGNATURE_FUNC = '(';
35 static final char SIGNATURE_ENDFUNC = ')';
36
37 private String signature;
38 private List<String> typeNameList;
39 private List<String> signatureList;
40 private int currentIndex;
41
42 JNITypeParser(String signature) {
43 this.signature = signature;
44 }
45
46 static String typeNameToSignature(String typeName) {
47 StringBuilder sb = new StringBuilder();
48 int firstIndex = typeName.indexOf('[');
49 int index = firstIndex;
50 while (index != -1) {
51 sb.append('[');
52 index = typeName.indexOf('[', index + 1);
53 }
54
55 if (firstIndex != -1) {
56 typeName = typeName.substring(0, firstIndex);
57 }
58
59 if (typeName.equals("boolean")) {
60 sb.append('Z');
61 } else if (typeName.equals("byte")) {
62 sb.append('B');
63 } else if (typeName.equals("char")) {
64 sb.append('C');
65 } else if (typeName.equals("short")) {
66 sb.append('S');
67 } else if (typeName.equals("int")) {
68 sb.append('I');
69 } else if (typeName.equals("long")) {
70 sb.append('J');
71 } else if (typeName.equals("float")) {
72 sb.append('F');
73 } else if (typeName.equals("double")) {
74 sb.append('D');
75 } else {
76 sb.append('L');
77 index = typeName.indexOf("/"); // check if it's a hidden class
78 if (index < 0) {
79 sb.append(typeName.replace('.', '/'));
80 sb.append(";");
81 } else {
82 sb.append(typeName.substring(0, index).replace('.', '/'));
83 sb.append(";");
84 sb.append(typeName.substring(index, typeName.length()));
85 }
86 }
87
88 return sb.toString();
89 }
90
91 String typeName() {
92 return typeNameList().get(typeNameList().size()-1);
93 }
94
95 List<String> argumentTypeNames() {
96 return typeNameList().subList(0, typeNameList().size() - 1);
97 }
98
99 String signature() {
100 return signatureList().get(signatureList().size()-1);
101 }
102
103 List<String> argumentSignatures() {
104 return signatureList().subList(0, signatureList().size() - 1);
105 }
106
107 int dimensionCount() {
108 int count = 0;
109 String signature = signature();
110 while (signature.charAt(count) == '[') {
111 count++;
112 }
113 return count;
114 }
115
116 String componentSignature(int level) {
117 return signature().substring(level);
118 }
119
120 private synchronized List<String> signatureList() {
121 if (signatureList == null) {
122 signatureList = new ArrayList<>(10);
123 String elem;
124
125 currentIndex = 0;
126
127 while(currentIndex < signature.length()) {
128 elem = nextSignature();
129 signatureList.add(elem);
130 }
131 if (signatureList.size() == 0) {
132 throw new IllegalArgumentException("Invalid JNI signature '" +
133 signature + "'");
134 }
135 }
136 return signatureList;
137 }
138
139 private synchronized List<String> typeNameList() {
140 if (typeNameList == null) {
141 typeNameList = new ArrayList<>(10);
142 String elem;
143
144 currentIndex = 0;
145
146 while(currentIndex < signature.length()) {
147 elem = nextTypeName();
148 typeNameList.add(elem);
149 }
150 if (typeNameList.size() == 0) {
151 throw new IllegalArgumentException("Invalid JNI signature '" +
152 signature + "'");
153 }
154 }
155 return typeNameList;
156 }
157
158 private String nextSignature() {
159 char key = signature.charAt(currentIndex++);
160
161 switch(key) {
162 case (JDWP.Tag.ARRAY):
163 return key + nextSignature();
164
165 case (JDWP.Tag.OBJECT):
166 int endClass = signature.indexOf(SIGNATURE_ENDCLASS,
167 currentIndex);
168 String retVal;
169 if ((endClass+1) < signature.length() && signature.charAt(endClass+1) == '/') {
170 // hidden class
171 retVal = signature.substring(currentIndex - 1);
172 currentIndex = signature.length();
173 } else {
174 retVal = signature.substring(currentIndex - 1, endClass + 1);
175 currentIndex = endClass + 1;
176 }
177 return retVal;
178
179 case (JDWP.Tag.VOID):
180 case (JDWP.Tag.BOOLEAN):
181 case (JDWP.Tag.BYTE):
182 case (JDWP.Tag.CHAR):
183 case (JDWP.Tag.SHORT):
184 case (JDWP.Tag.INT):
185 case (JDWP.Tag.LONG):
186 case (JDWP.Tag.FLOAT):
187 case (JDWP.Tag.DOUBLE):
188 return String.valueOf(key);
189
190 case SIGNATURE_ENDFUNC:
191 case SIGNATURE_FUNC:
192 return nextSignature();
193
194 default:
195 throw new IllegalArgumentException(
196 "Invalid JNI signature character '" + key + "'");
197
198 }
199 }
200
201 private String nextTypeName() {
202 char key = signature.charAt(currentIndex++);
203
204 switch(key) {
205 case (JDWP.Tag.ARRAY):
206 return nextTypeName() + "[]";
207
208 case (JDWP.Tag.BYTE):
209 return "byte";
210
211 case (JDWP.Tag.CHAR):
212 return "char";
213
214 case (JDWP.Tag.OBJECT):
215 int endClass = signature.indexOf(SIGNATURE_ENDCLASS,
216 currentIndex);
217 String retVal = signature.substring(currentIndex,
218 endClass);
219 if ((endClass+1) < signature.length() && signature.charAt(endClass+1) == '/') {
220 // hidden class
221 retVal = retVal.replace('/', '.') + signature.substring(endClass + 1);
222 currentIndex = signature.length();
223 } else {
224 retVal = retVal.replace('/', '.');
225 currentIndex = endClass + 1;
226 }
227 return retVal;
228
229 case (JDWP.Tag.FLOAT):
230 return "float";
231
232 case (JDWP.Tag.DOUBLE):
233 return "double";
234
235 case (JDWP.Tag.INT):
236 return "int";
237
238 case (JDWP.Tag.LONG):
239 return "long";
240
241 case (JDWP.Tag.SHORT):
242 return "short";
243
244 case (JDWP.Tag.VOID):
245 return "void";
246
247 case (JDWP.Tag.BOOLEAN):
248 return "boolean";
249
250 case SIGNATURE_ENDFUNC:
251 case SIGNATURE_FUNC:
252 return nextTypeName();
253
254 default:
255 throw new IllegalArgumentException(
256 "Invalid JNI signature character '" + key + "'");
257 }
258 }
259 }