1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /*
26 * This file is available under and governed by the GNU General Public
27 * License version 2 only, as published by the Free Software Foundation.
28 * However, the following notice accompanied the original version of this
29 * file:
30 *
31 * ASM: a very small and fast Java bytecode manipulation framework
32 * Copyright (c) 2000-2011 INRIA, France Telecom
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of the copyright holders nor the names of its
44 * contributors may be used to endorse or promote products derived from
45 * this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
57 * THE POSSIBILITY OF SUCH DAMAGE.
58 */
59 package jdk.internal.org.objectweb.asm.tree.analysis;
60
61 import java.util.List;
62
63 import jdk.internal.org.objectweb.asm.Handle;
64 import jdk.internal.org.objectweb.asm.Opcodes;
65 import jdk.internal.org.objectweb.asm.Type;
66 import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;
67 import jdk.internal.org.objectweb.asm.tree.FieldInsnNode;
68 import jdk.internal.org.objectweb.asm.tree.IntInsnNode;
69 import jdk.internal.org.objectweb.asm.tree.InvokeDynamicInsnNode;
70 import jdk.internal.org.objectweb.asm.tree.LdcInsnNode;
71 import jdk.internal.org.objectweb.asm.tree.MethodInsnNode;
72 import jdk.internal.org.objectweb.asm.tree.MultiANewArrayInsnNode;
73 import jdk.internal.org.objectweb.asm.tree.TypeInsnNode;
74
75 /**
76 * An {@link Interpreter} for {@link BasicValue} values.
77 *
78 * @author Eric Bruneton
79 * @author Bing Ran
80 */
81 public class BasicInterpreter extends Interpreter<BasicValue> implements
82 Opcodes {
83
84 public BasicInterpreter() {
85 super(ASM5);
86 }
87
88 protected BasicInterpreter(final int api) {
89 super(api);
90 }
91
92 @Override
93 public BasicValue newValue(final Type type) {
94 if (type == null) {
95 return BasicValue.UNINITIALIZED_VALUE;
96 }
97 switch (type.getSort()) {
98 case Type.VOID:
99 return null;
100 case Type.BOOLEAN:
101 case Type.CHAR:
102 case Type.BYTE:
103 case Type.SHORT:
104 case Type.INT:
105 return BasicValue.INT_VALUE;
106 case Type.FLOAT:
107 return BasicValue.FLOAT_VALUE;
108 case Type.LONG:
109 return BasicValue.LONG_VALUE;
110 case Type.DOUBLE:
111 return BasicValue.DOUBLE_VALUE;
112 case Type.ARRAY:
113 case Type.OBJECT:
114 return BasicValue.REFERENCE_VALUE;
115 default:
116 throw new Error("Internal error");
117 }
118 }
119
120 @Override
121 public BasicValue newOperation(final AbstractInsnNode insn)
122 throws AnalyzerException {
123 switch (insn.getOpcode()) {
124 case ACONST_NULL:
125 return newValue(Type.getObjectType("null"));
126 case ICONST_M1:
127 case ICONST_0:
128 case ICONST_1:
129 case ICONST_2:
130 case ICONST_3:
131 case ICONST_4:
132 case ICONST_5:
133 return BasicValue.INT_VALUE;
134 case LCONST_0:
135 case LCONST_1:
136 return BasicValue.LONG_VALUE;
137 case FCONST_0:
138 case FCONST_1:
139 case FCONST_2:
140 return BasicValue.FLOAT_VALUE;
141 case DCONST_0:
142 case DCONST_1:
143 return BasicValue.DOUBLE_VALUE;
144 case BIPUSH:
145 case SIPUSH:
146 return BasicValue.INT_VALUE;
147 case LDC:
148 Object cst = ((LdcInsnNode) insn).cst;
149 if (cst instanceof Integer) {
150 return BasicValue.INT_VALUE;
151 } else if (cst instanceof Float) {
152 return BasicValue.FLOAT_VALUE;
153 } else if (cst instanceof Long) {
154 return BasicValue.LONG_VALUE;
155 } else if (cst instanceof Double) {
156 return BasicValue.DOUBLE_VALUE;
157 } else if (cst instanceof String) {
158 return newValue(Type.getObjectType("java/lang/String"));
159 } else if (cst instanceof Type) {
160 int sort = ((Type) cst).getSort();
161 if (sort == Type.OBJECT || sort == Type.ARRAY) {
162 return newValue(Type.getObjectType("java/lang/Class"));
163 } else if (sort == Type.METHOD) {
164 return newValue(Type
165 .getObjectType("java/lang/invoke/MethodType"));
166 } else {
167 throw new IllegalArgumentException("Illegal LDC constant "
168 + cst);
169 }
170 } else if (cst instanceof Handle) {
171 return newValue(Type
172 .getObjectType("java/lang/invoke/MethodHandle"));
173 } else {
174 throw new IllegalArgumentException("Illegal LDC constant "
175 + cst);
176 }
177 case JSR:
178 return BasicValue.RETURNADDRESS_VALUE;
179 case GETSTATIC:
180 return newValue(Type.getType(((FieldInsnNode) insn).desc));
181 case NEW:
182 return newValue(Type.getObjectType(((TypeInsnNode) insn).desc));
183 default:
184 throw new Error("Internal error.");
185 }
186 }
187
188 @Override
189 public BasicValue copyOperation(final AbstractInsnNode insn,
190 final BasicValue value) throws AnalyzerException {
191 return value;
192 }
193
194 @Override
195 public BasicValue unaryOperation(final AbstractInsnNode insn,
196 final BasicValue value) throws AnalyzerException {
197 switch (insn.getOpcode()) {
198 case INEG:
199 case IINC:
200 case L2I:
201 case F2I:
202 case D2I:
203 case I2B:
204 case I2C:
205 case I2S:
206 return BasicValue.INT_VALUE;
207 case FNEG:
208 case I2F:
209 case L2F:
210 case D2F:
211 return BasicValue.FLOAT_VALUE;
212 case LNEG:
213 case I2L:
214 case F2L:
215 case D2L:
216 return BasicValue.LONG_VALUE;
217 case DNEG:
218 case I2D:
219 case L2D:
220 case F2D:
221 return BasicValue.DOUBLE_VALUE;
222 case IFEQ:
223 case IFNE:
224 case IFLT:
225 case IFGE:
226 case IFGT:
227 case IFLE:
228 case TABLESWITCH:
229 case LOOKUPSWITCH:
230 case IRETURN:
231 case LRETURN:
232 case FRETURN:
233 case DRETURN:
234 case ARETURN:
235 case PUTSTATIC:
236 return null;
237 case GETFIELD:
238 return newValue(Type.getType(((FieldInsnNode) insn).desc));
239 case NEWARRAY:
240 switch (((IntInsnNode) insn).operand) {
241 case T_BOOLEAN:
242 return newValue(Type.getType("[Z"));
243 case T_CHAR:
244 return newValue(Type.getType("[C"));
245 case T_BYTE:
246 return newValue(Type.getType("[B"));
247 case T_SHORT:
248 return newValue(Type.getType("[S"));
249 case T_INT:
250 return newValue(Type.getType("[I"));
251 case T_FLOAT:
252 return newValue(Type.getType("[F"));
253 case T_DOUBLE:
254 return newValue(Type.getType("[D"));
255 case T_LONG:
256 return newValue(Type.getType("[J"));
257 default:
258 throw new AnalyzerException(insn, "Invalid array type");
259 }
260 case ANEWARRAY:
261 String desc = ((TypeInsnNode) insn).desc;
262 return newValue(Type.getType("[" + Type.getObjectType(desc)));
263 case ARRAYLENGTH:
264 return BasicValue.INT_VALUE;
265 case ATHROW:
266 return null;
267 case CHECKCAST:
268 desc = ((TypeInsnNode) insn).desc;
269 return newValue(Type.getObjectType(desc));
270 case INSTANCEOF:
271 return BasicValue.INT_VALUE;
272 case MONITORENTER:
273 case MONITOREXIT:
274 case IFNULL:
275 case IFNONNULL:
276 return null;
277 default:
278 throw new Error("Internal error.");
279 }
280 }
281
282 @Override
283 public BasicValue binaryOperation(final AbstractInsnNode insn,
284 final BasicValue value1, final BasicValue value2)
285 throws AnalyzerException {
286 switch (insn.getOpcode()) {
287 case IALOAD:
288 case BALOAD:
289 case CALOAD:
290 case SALOAD:
291 case IADD:
292 case ISUB:
293 case IMUL:
294 case IDIV:
295 case IREM:
296 case ISHL:
297 case ISHR:
298 case IUSHR:
299 case IAND:
300 case IOR:
301 case IXOR:
302 return BasicValue.INT_VALUE;
303 case FALOAD:
304 case FADD:
305 case FSUB:
306 case FMUL:
307 case FDIV:
308 case FREM:
309 return BasicValue.FLOAT_VALUE;
310 case LALOAD:
311 case LADD:
312 case LSUB:
313 case LMUL:
314 case LDIV:
315 case LREM:
316 case LSHL:
317 case LSHR:
318 case LUSHR:
319 case LAND:
320 case LOR:
321 case LXOR:
322 return BasicValue.LONG_VALUE;
323 case DALOAD:
324 case DADD:
325 case DSUB:
326 case DMUL:
327 case DDIV:
328 case DREM:
329 return BasicValue.DOUBLE_VALUE;
330 case AALOAD:
331 return BasicValue.REFERENCE_VALUE;
332 case LCMP:
333 case FCMPL:
334 case FCMPG:
335 case DCMPL:
336 case DCMPG:
337 return BasicValue.INT_VALUE;
338 case IF_ICMPEQ:
339 case IF_ICMPNE:
340 case IF_ICMPLT:
341 case IF_ICMPGE:
342 case IF_ICMPGT:
343 case IF_ICMPLE:
344 case IF_ACMPEQ:
345 case IF_ACMPNE:
346 case PUTFIELD:
347 return null;
348 default:
349 throw new Error("Internal error.");
350 }
351 }
352
353 @Override
354 public BasicValue ternaryOperation(final AbstractInsnNode insn,
355 final BasicValue value1, final BasicValue value2,
356 final BasicValue value3) throws AnalyzerException {
357 return null;
358 }
359
360 @Override
361 public BasicValue naryOperation(final AbstractInsnNode insn,
362 final List<? extends BasicValue> values) throws AnalyzerException {
363 int opcode = insn.getOpcode();
364 if (opcode == MULTIANEWARRAY) {
365 return newValue(Type.getType(((MultiANewArrayInsnNode) insn).desc));
366 } else if (opcode == INVOKEDYNAMIC) {
367 return newValue(Type
368 .getReturnType(((InvokeDynamicInsnNode) insn).desc));
369 } else {
370 return newValue(Type.getReturnType(((MethodInsnNode) insn).desc));
371 }
372 }
373
374 @Override
375 public void returnOperation(final AbstractInsnNode insn,
376 final BasicValue value, final BasicValue expected)
377 throws AnalyzerException {
378 }
379
380 @Override
381 public BasicValue merge(final BasicValue v, final BasicValue w) {
382 if (!v.equals(w)) {
383 return BasicValue.UNINITIALIZED_VALUE;
384 }
385 return v;
386 }
387 }