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org.aspectj/bcel-builder/verifier-src/org/aspectj/apache/bcel/verifier/InstructionWalker.java

InstructionWalker.java 13KB
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  1. /* ====================================================================

  2.  * The Apache Software License, Version 1.1

  3.  *

  4.  * Copyright (c) 2001 The Apache Software Foundation.  All rights

  5.  * reserved.

  6.  *

  7.  * Redistribution and use in source and binary forms, with or without

  8.  * modification, are permitted provided that the following conditions

  9.  * are met:

  10.  *

  11.  * 1. Redistributions of source code must retain the above copyright

  12.  *    notice, i list of conditions and the following disclaimer.

  13.  *

  14.  * 2. Redistributions in binary form must reproduce the above copyright

  15.  *    notice, i list of conditions and the following disclaimer in

  16.  *    the documentation and/or other materials provided with the

  17.  *    distribution.

  18.  *

  19.  * 3. The end-user documentation included with the redistribution,

  20.  *    if any, must include the following acknowledgment:

  21.  *       "i product includes software developed by the

  22.  *        Apache Software Foundation (https://www.apache.org/)."

  23.  *    Alternately, i acknowledgment may appear in the software itself,

  24.  *    if and wherever such third-party acknowledgments normally appear.

  25.  *

  26.  * 4. The names "Apache" and "Apache Software Foundation" and

  27.  *    "Apache BCEL" must not be used to endorse or promote products

  28.  *    derived from i software without prior written permission. For

  29.  *    written permission, please contact apache@apache.org.

  30.  *

  31.  * 5. Products derived from i software may not be called "Apache",

  32.  *    "Apache BCEL", nor may "Apache" appear in their name, without

  33.  *    prior written permission of the Apache Software Foundation.

  34.  *

  35.  * i SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED

  36.  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

  37.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  38.  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR

  39.  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

  40.  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

  41.  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

  42.  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

  43.  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  44.  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

  45.  * OF THE USE OF i SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  46.  * SUCH DAMAGE.

  47.  * ====================================================================

  48.  *

  49.  * i software consists of voluntary contributions made by many

  50.  * individuals on behalf of the Apache Software Foundation.  For more

  51.  * information on the Apache Software Foundation, please see

  52.  * <https://www.apache.org/>.

  53.  */

  54. package org.aspectj.apache.bcel.verifier;

  55. 

  56. import org.aspectj.apache.bcel.Constants;

  57. import org.aspectj.apache.bcel.generic.FieldInstruction;

  58. import org.aspectj.apache.bcel.generic.InstVisitor;

  59. import org.aspectj.apache.bcel.generic.Instruction;

  60. import org.aspectj.apache.bcel.generic.InstructionBranch;

  61. import org.aspectj.apache.bcel.generic.InstructionLV;

  62. import org.aspectj.apache.bcel.generic.InvokeInstruction;

  63. 

  64. /**

  65.  * Traverse an instruction

  66.  * 

  67.  * @author Andy Clement

  68.  */

  69. public class InstructionWalker implements Constants {

  70. 

  71. 	/**

  72. 	 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call methods

  73. 	 * according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.

  74. 	 * 

  75. 	 * @param i the instruction to visit

  76. 	 * @param v Visitor object

  77. 	 */

  78. 	public static void accept(Instruction i, InstVisitor v) {

  79. 		switch (i.opcode) {

  80. 		case IMPDEP1:

  81. 			v.visitIMPDEP1(i);

  82. 			break;

  83. 		case IMPDEP2:

  84. 			v.visitIMPDEP2(i);

  85. 			break;

  86. 		case MONITORENTER:

  87. 			v.visitExceptionThrower(i);

  88. 			v.visitStackConsumer(i);

  89. 			v.visitMONITORENTER(i);

  90. 			break;

  91. 		case MONITOREXIT:

  92. 			v.visitExceptionThrower(i);

  93. 			v.visitStackConsumer(i);

  94. 			v.visitMONITOREXIT(i);

  95. 			break;

  96. 		case LCMP:

  97. 			v.visitTypedInstruction(i);

  98. 			v.visitStackProducer(i);

  99. 			v.visitStackConsumer(i);

  100. 			v.visitLCMP(i);

  101. 			break;

  102. 		case FCMPL:

  103. 			v.visitTypedInstruction(i);

  104. 			v.visitStackProducer(i);

  105. 			v.visitStackConsumer(i);

  106. 			v.visitFCMPL(i);

  107. 			break;

  108. 		case FCMPG:

  109. 			v.visitTypedInstruction(i);

  110. 			v.visitStackProducer(i);

  111. 			v.visitStackConsumer(i);

  112. 			v.visitFCMPG(i);

  113. 			break;

  114. 		case DCMPL:

  115. 			v.visitTypedInstruction(i);

  116. 			v.visitStackProducer(i);

  117. 			v.visitStackConsumer(i);

  118. 			v.visitDCMPL(i);

  119. 			break;

  120. 		case DCMPG:

  121. 			v.visitTypedInstruction(i);

  122. 			v.visitStackProducer(i);

  123. 			v.visitStackConsumer(i);

  124. 			v.visitDCMPG(i);

  125. 			break;

  126. 		case NOP:

  127. 			v.visitNOP(i);

  128. 			break;

  129. 		case BREAKPOINT:

  130. 			v.visitBREAKPOINT(i);

  131. 			break;

  132. 		case SWAP:

  133. 			v.visitStackConsumer(i);

  134. 			v.visitStackProducer(i);

  135. 			v.visitStackInstruction(i);

  136. 			v.visitSWAP(i);

  137. 			break;

  138. 		case POP:

  139. 			v.visitStackConsumer(i);

  140. 			v.visitPopInstruction(i);

  141. 			v.visitStackInstruction(i);

  142. 			v.visitPOP(i);

  143. 			break;

  144. 		case POP2:

  145. 			v.visitStackConsumer(i);

  146. 			v.visitPopInstruction(i);

  147. 			v.visitStackInstruction(i);

  148. 			v.visitPOP2(i);

  149. 			break;

  150. 		case DUP2_X1:

  151. 			v.visitStackInstruction(i);

  152. 			v.visitDUP2_X1(i);

  153. 			break;

  154. 		case DUP2_X2:

  155. 			v.visitStackInstruction(i);

  156. 			v.visitDUP2_X2(i);

  157. 			break;

  158. 		case DUP2:

  159. 			v.visitStackProducer(i);

  160. 			v.visitPushInstruction(i);

  161. 			v.visitStackInstruction(i);

  162. 			v.visitDUP2(i);

  163. 			break;

  164. 		case DUP_X1:

  165. 			v.visitStackInstruction(i);

  166. 			v.visitDUP_X1(i);

  167. 			break;

  168. 		case DUP_X2:

  169. 			v.visitStackInstruction(i);

  170. 			v.visitDUP_X2(i);

  171. 			break;

  172. 		case DUP:

  173. 			v.visitStackProducer(i);

  174. 			v.visitPushInstruction(i);

  175. 			v.visitStackInstruction(i);

  176. 			v.visitDUP(i);

  177. 			break;

  178. 		case BASTORE:

  179. 			v.visitStackConsumer(i);

  180. 			v.visitExceptionThrower(i);

  181. 			v.visitTypedInstruction(i);

  182. 			v.visitArrayInstruction(i);

  183. 			v.visitBASTORE(i);

  184. 			break;

  185. 		case CASTORE:

  186. 			v.visitStackConsumer(i);

  187. 			v.visitExceptionThrower(i);

  188. 			v.visitTypedInstruction(i);

  189. 			v.visitArrayInstruction(i);

  190. 			v.visitCASTORE(i);

  191. 			break;

  192. 		case SASTORE:

  193. 			v.visitStackConsumer(i);

  194. 			v.visitExceptionThrower(i);

  195. 			v.visitTypedInstruction(i);

  196. 			v.visitArrayInstruction(i);

  197. 			v.visitSASTORE(i);

  198. 			break;

  199. 		case DASTORE:

  200. 			v.visitStackConsumer(i);

  201. 			v.visitExceptionThrower(i);

  202. 			v.visitTypedInstruction(i);

  203. 			v.visitArrayInstruction(i);

  204. 			v.visitDASTORE(i);

  205. 			break;

  206. 		case FASTORE:

  207. 			v.visitStackConsumer(i);

  208. 			v.visitExceptionThrower(i);

  209. 			v.visitTypedInstruction(i);

  210. 			v.visitArrayInstruction(i);

  211. 			v.visitFASTORE(i);

  212. 			break;

  213. 		case LASTORE:

  214. 			v.visitStackConsumer(i);

  215. 			v.visitExceptionThrower(i);

  216. 			v.visitTypedInstruction(i);

  217. 			v.visitArrayInstruction(i);

  218. 			v.visitLASTORE(i);

  219. 			break;

  220. 		case IASTORE:

  221. 			v.visitStackConsumer(i);

  222. 			v.visitExceptionThrower(i);

  223. 			v.visitTypedInstruction(i);

  224. 			v.visitArrayInstruction(i);

  225. 			v.visitIASTORE(i);

  226. 			break;

  227. 		case AASTORE:

  228. 			v.visitStackConsumer(i);

  229. 			v.visitExceptionThrower(i);

  230. 			v.visitTypedInstruction(i);

  231. 			v.visitArrayInstruction(i);

  232. 			v.visitAASTORE(i);

  233. 			break;

  234. 		case SALOAD:

  235. 			v.visitStackProducer(i);

  236. 			v.visitExceptionThrower(i);

  237. 			v.visitTypedInstruction(i);

  238. 			v.visitArrayInstruction(i);

  239. 			v.visitSALOAD(i);

  240. 			break;

  241. 		case CALOAD:

  242. 			v.visitStackProducer(i);

  243. 			v.visitExceptionThrower(i);

  244. 			v.visitTypedInstruction(i);

  245. 			v.visitArrayInstruction(i);

  246. 			v.visitCALOAD(i);

  247. 			break;

  248. 		case DALOAD:

  249. 			v.visitStackProducer(i);

  250. 			v.visitExceptionThrower(i);

  251. 			v.visitTypedInstruction(i);

  252. 			v.visitArrayInstruction(i);

  253. 			v.visitDALOAD(i);

  254. 			break;

  255. 		case FALOAD:

  256. 			v.visitStackProducer(i);

  257. 			v.visitExceptionThrower(i);

  258. 			v.visitTypedInstruction(i);

  259. 			v.visitArrayInstruction(i);

  260. 			v.visitFALOAD(i);

  261. 			break;

  262. 		case LALOAD:

  263. 			v.visitStackProducer(i);

  264. 			v.visitExceptionThrower(i);

  265. 			v.visitTypedInstruction(i);

  266. 			v.visitArrayInstruction(i);

  267. 			v.visitLALOAD(i);

  268. 			break;

  269. 		case AALOAD:

  270. 			v.visitStackProducer(i);

  271. 			v.visitExceptionThrower(i);

  272. 			v.visitTypedInstruction(i);

  273. 			v.visitArrayInstruction(i);

  274. 			v.visitAALOAD(i);

  275. 			break;

  276. 		case ATHROW:

  277. 			v.visitUnconditionalBranch(i);

  278. 			v.visitExceptionThrower(i);

  279. 			v.visitATHROW(i);

  280. 			break;

  281. 		case ACONST_NULL:

  282. 			v.visitStackProducer(i);

  283. 			v.visitPushInstruction(i);

  284. 			v.visitTypedInstruction(i);

  285. 			v.visitACONST_NULL(i);

  286. 			break;

  287. 		case ICONST_M1:

  288. 		case ICONST_0:

  289. 		case ICONST_1:

  290. 		case ICONST_2:

  291. 		case ICONST_3:

  292. 		case ICONST_4:

  293. 		case ICONST_5:

  294. 			v.visitPushInstruction(i);

  295. 			v.visitStackProducer(i);

  296. 			v.visitTypedInstruction(i);

  297. 			v.visitConstantPushInstruction(i);

  298. 			v.visitICONST(i);

  299. 			break;

  300. 		case LCONST_0:

  301. 		case LCONST_1:

  302. 			v.visitPushInstruction(i);

  303. 			v.visitStackProducer(i);

  304. 			v.visitTypedInstruction(i);

  305. 			v.visitConstantPushInstruction(i);

  306. 			v.visitLCONST(i);

  307. 			break;

  308. 		case FCONST_0:

  309. 		case FCONST_1:

  310. 		case FCONST_2:

  311. 			v.visitPushInstruction(i);

  312. 			v.visitStackProducer(i);

  313. 			v.visitTypedInstruction(i);

  314. 			v.visitConstantPushInstruction(i);

  315. 			v.visitFCONST(i);

  316. 			break;

  317. 		case DCONST_0:

  318. 		case DCONST_1:

  319. 			v.visitPushInstruction(i);

  320. 			v.visitStackProducer(i);

  321. 			v.visitTypedInstruction(i);

  322. 			v.visitConstantPushInstruction(i);

  323. 			v.visitDCONST(i);

  324. 			break;

  325. 		case BALOAD:

  326. 			v.visitStackProducer(i);

  327. 			v.visitExceptionThrower(i);

  328. 			v.visitTypedInstruction(i);

  329. 			v.visitArrayInstruction(i);

  330. 			v.visitBALOAD(i);

  331. 			break;

  332. 		case IALOAD:

  333. 			v.visitStackProducer(i);

  334. 			v.visitExceptionThrower(i);

  335. 			v.visitTypedInstruction(i);

  336. 			v.visitArrayInstruction(i);

  337. 			v.visitIALOAD(i);

  338. 			break;

  339. 		case BIPUSH:

  340. 			v.visitPushInstruction(i);

  341. 			v.visitStackProducer(i);

  342. 			v.visitTypedInstruction(i);

  343. 			v.visitConstantPushInstruction(i);

  344. 			v.visitBIPUSH(i);

  345. 			break;

  346. 		case SIPUSH:

  347. 			v.visitPushInstruction(i);

  348. 			v.visitStackProducer(i);

  349. 			v.visitTypedInstruction(i);

  350. 			v.visitConstantPushInstruction(i);

  351. 			v.visitSIPUSH(i);

  352. 			break;

  353. 		case LDC:

  354. 		case LDC_W:

  355. 			v.visitStackProducer(i);

  356. 			v.visitPushInstruction(i);

  357. 			v.visitExceptionThrower(i);

  358. 			v.visitTypedInstruction(i);

  359. 			v.visitCPInstruction(i);

  360. 			v.visitLDC(i);

  361. 			break;

  362. 		case LDC2_W:

  363. 			v.visitStackProducer(i);

  364. 			v.visitPushInstruction(i);

  365. 			v.visitTypedInstruction(i);

  366. 			v.visitCPInstruction(i);

  367. 			v.visitLDC2_W(i);

  368. 			break;

  369. 		case ARRAYLENGTH:

  370. 			v.visitExceptionThrower(i);

  371. 			v.visitStackProducer(i);

  372. 			v.visitARRAYLENGTH(i);

  373. 			break;

  374. 		case ASTORE_0:

  375. 			v.visitStackConsumer(i);

  376. 			v.visitPopInstruction(i);

  377. 			v.visitStoreInstruction(i);

  378. 			v.visitTypedInstruction(i);

  379. 			v.visitLocalVariableInstruction((InstructionLV) i);

  380. 			v.visitStoreInstruction(i);

  381. 			v.visitASTORE(i);

  382. 			break;

  383. 		case ALOAD_0:

  384. 			v.visitStackConsumer(i);

  385. 			v.visitPopInstruction(i);

  386. 			v.visitStoreInstruction(i);

  387. 			v.visitTypedInstruction(i);

  388. 			v.visitLocalVariableInstruction((InstructionLV) i);

  389. 			v.visitStoreInstruction(i);

  390. 			v.visitALOAD(i);

  391. 			break;

  392. 		// for store instructions: ISTORE > ASTORE_3 - needs to visit the instruction too

  393. 		// v.visitStackConsumer(i);

  394. 		// v.visitPopInstruction(i);

  395. 		// v.visitStoreInstruction(i);

  396. 		// v.visitTypedInstruction(i);

  397. 		// v.visitLocalVariableInstruction(i);

  398. 		// v.visitStoreInstruction(i);

  399. 		// for load instructions: ILOAD > ALOAD_3 - needs to visit the instruction too

  400. 		// v.visitStackProducer(i);

  401. 		// v.visitPushInstruction(i);

  402. 		// v.visitTypedInstruction(i);

  403. 		// v.visitLocalVariableInstruction(i);

  404. 		// v.visitLoadInstruction(i);

  405. 

  406. 		// for conversion instructions: (all 15 of them) - needs to visit conversion instruction too

  407. 		// v.visitTypedInstruction(i);

  408. 		// v.visitStackProducer(i);

  409. 		// v.visitStackConsumer(i);

  410. 		// v.visitConversionInstruction(i);

  411. 

  412. 		// arithmetic instructions - need to visit the instructions too (iadd etc)

  413. 		// v.visitTypedInstruction(i);

  414. 		// v.visitStackProducer(i);

  415. 		// v.visitStackConsumer(i);

  416. 		// v.visitArithmeticInstruction(i);

  417. 

  418. 		case INVOKESTATIC:

  419. 			v.visitExceptionThrower(i);

  420. 			v.visitTypedInstruction(i);

  421. 			v.visitStackConsumer(i);

  422. 			v.visitStackProducer(i);

  423. 			v.visitLoadClass(i);

  424. 			v.visitCPInstruction(i);

  425. 			v.visitFieldOrMethod(i);

  426. 			v.visitInvokeInstruction((InvokeInstruction) i);

  427. 			v.visitINVOKESTATIC((InvokeInstruction) i);

  428. 			break;

  429. 

  430. 		case GOTO:

  431. 			v.visitVariableLengthInstruction(i);

  432. 			v.visitUnconditionalBranch(i);

  433. 			v.visitBranchInstruction((InstructionBranch) i);

  434. 			v.visitGotoInstruction(i);

  435. 			v.visitGOTO(i);

  436. 			break;

  437. 		case PUTSTATIC:

  438. 			v.visitExceptionThrower(i);

  439. 			v.visitStackConsumer(i);

  440. 			v.visitPopInstruction(i);

  441. 			v.visitTypedInstruction(i);

  442. 			v.visitLoadClass(i);

  443. 			v.visitCPInstruction(i);

  444. 			v.visitFieldOrMethod(i);

  445. 			v.visitFieldInstruction(i);

  446. 			v.visitPUTSTATIC((FieldInstruction) i);

  447. 			break;

  448. 		case RETURN:

  449. 			v.visitExceptionThrower(i);

  450. 			v.visitTypedInstruction(i);

  451. 			v.visitStackConsumer(i);

  452. 			v.visitReturnInstruction(i);

  453. 			v.visitRETURN(i);

  454. 			break;

  455. 		default:

  456. 			throw new IllegalStateException("visiting not yet implemented for " + i.getName().toUpperCase());

  457. 		}

  458. 	}

  459. }