J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 1 | /* |
Kelly O'Hair | fe008ae | 2010-05-25 15:58:33 -0700 | [diff] [blame] | 2 | * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved. |
J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 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 |
Kelly O'Hair | fe008ae | 2010-05-25 15:58:33 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. Oracle designates this |
J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 8 | * particular file as subject to the "Classpath" exception as provided |
Kelly O'Hair | fe008ae | 2010-05-25 15:58:33 -0700 | [diff] [blame] | 9 | * by Oracle in the LICENSE file that accompanied this code. |
J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 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 | * |
Kelly O'Hair | fe008ae | 2010-05-25 15:58:33 -0700 | [diff] [blame] | 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. |
J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 24 | */ |
| 25 | |
| 26 | package sun.reflect; |
| 27 | |
| 28 | class ClassFileAssembler implements ClassFileConstants { |
| 29 | private ByteVector vec; |
| 30 | private short cpIdx = 0; |
| 31 | |
| 32 | public ClassFileAssembler() { |
| 33 | this(ByteVectorFactory.create()); |
| 34 | } |
| 35 | |
| 36 | public ClassFileAssembler(ByteVector vec) { |
| 37 | this.vec = vec; |
| 38 | } |
| 39 | |
| 40 | public ByteVector getData() { |
| 41 | return vec; |
| 42 | } |
| 43 | |
| 44 | /** Length in bytes */ |
| 45 | public short getLength() { |
| 46 | return (short) vec.getLength(); |
| 47 | } |
| 48 | |
| 49 | public void emitMagicAndVersion() { |
| 50 | emitInt(0xCAFEBABE); |
| 51 | emitShort((short) 0); |
| 52 | emitShort((short) 49); |
| 53 | } |
| 54 | |
| 55 | public void emitInt(int val) { |
| 56 | emitByte((byte) (val >> 24)); |
| 57 | emitByte((byte) ((val >> 16) & 0xFF)); |
| 58 | emitByte((byte) ((val >> 8) & 0xFF)); |
| 59 | emitByte((byte) (val & 0xFF)); |
| 60 | } |
| 61 | |
| 62 | public void emitShort(short val) { |
| 63 | emitByte((byte) ((val >> 8) & 0xFF)); |
| 64 | emitByte((byte) (val & 0xFF)); |
| 65 | } |
| 66 | |
| 67 | // Support for labels; package-private |
| 68 | void emitShort(short bci, short val) { |
| 69 | vec.put(bci, (byte) ((val >> 8) & 0xFF)); |
| 70 | vec.put(bci + 1, (byte) (val & 0xFF)); |
| 71 | } |
| 72 | |
| 73 | public void emitByte(byte val) { |
| 74 | vec.add(val); |
| 75 | } |
| 76 | |
| 77 | public void append(ClassFileAssembler asm) { |
| 78 | append(asm.vec); |
| 79 | } |
| 80 | |
| 81 | public void append(ByteVector vec) { |
| 82 | for (int i = 0; i < vec.getLength(); i++) { |
| 83 | emitByte(vec.get(i)); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | /** Keeps track of the current (one-based) constant pool index; |
| 88 | incremented after emitting one of the following constant pool |
| 89 | entries. Can fetch the current constant pool index for use in |
| 90 | later entries. Index points at the last valid constant pool |
| 91 | entry; initially invalid. It is illegal to fetch the constant |
| 92 | pool index before emitting at least one constant pool entry. */ |
| 93 | public short cpi() { |
| 94 | if (cpIdx == 0) { |
| 95 | throw new RuntimeException("Illegal use of ClassFileAssembler"); |
| 96 | } |
| 97 | return cpIdx; |
| 98 | } |
| 99 | |
| 100 | public void emitConstantPoolUTF8(String str) { |
| 101 | // NOTE: can not use str.getBytes("UTF-8") here because of |
| 102 | // bootstrapping issues with the character set converters. |
| 103 | byte[] bytes = UTF8.encode(str); |
| 104 | emitByte(CONSTANT_Utf8); |
| 105 | emitShort((short) bytes.length); |
| 106 | for (int i = 0; i < bytes.length; i++) { |
| 107 | emitByte(bytes[i]); |
| 108 | } |
| 109 | cpIdx++; |
| 110 | } |
| 111 | |
| 112 | public void emitConstantPoolClass(short index) { |
| 113 | emitByte(CONSTANT_Class); |
| 114 | emitShort(index); |
| 115 | cpIdx++; |
| 116 | } |
| 117 | |
| 118 | public void emitConstantPoolNameAndType(short nameIndex, short typeIndex) { |
| 119 | emitByte(CONSTANT_NameAndType); |
| 120 | emitShort(nameIndex); |
| 121 | emitShort(typeIndex); |
| 122 | cpIdx++; |
| 123 | } |
| 124 | |
| 125 | public void emitConstantPoolFieldref |
| 126 | (short classIndex, short nameAndTypeIndex) |
| 127 | { |
| 128 | emitByte(CONSTANT_Fieldref); |
| 129 | emitShort(classIndex); |
| 130 | emitShort(nameAndTypeIndex); |
| 131 | cpIdx++; |
| 132 | } |
| 133 | |
| 134 | public void emitConstantPoolMethodref |
| 135 | (short classIndex, short nameAndTypeIndex) |
| 136 | { |
| 137 | emitByte(CONSTANT_Methodref); |
| 138 | emitShort(classIndex); |
| 139 | emitShort(nameAndTypeIndex); |
| 140 | cpIdx++; |
| 141 | } |
| 142 | |
| 143 | public void emitConstantPoolInterfaceMethodref |
| 144 | (short classIndex, short nameAndTypeIndex) |
| 145 | { |
| 146 | emitByte(CONSTANT_InterfaceMethodref); |
| 147 | emitShort(classIndex); |
| 148 | emitShort(nameAndTypeIndex); |
| 149 | cpIdx++; |
| 150 | } |
| 151 | |
| 152 | public void emitConstantPoolString(short utf8Index) { |
| 153 | emitByte(CONSTANT_String); |
| 154 | emitShort(utf8Index); |
| 155 | cpIdx++; |
| 156 | } |
| 157 | |
| 158 | //---------------------------------------------------------------------- |
| 159 | // Opcodes. Keeps track of maximum stack and locals. Make a new |
| 160 | // assembler for each piece of assembled code, then append the |
| 161 | // result to the previous assembler's class file. |
| 162 | // |
| 163 | |
| 164 | private int stack = 0; |
| 165 | private int maxStack = 0; |
| 166 | private int maxLocals = 0; |
| 167 | |
| 168 | private void incStack() { |
| 169 | setStack(stack + 1); |
| 170 | } |
| 171 | |
| 172 | private void decStack() { |
| 173 | --stack; |
| 174 | } |
| 175 | |
| 176 | public short getMaxStack() { |
| 177 | return (short) maxStack; |
| 178 | } |
| 179 | |
| 180 | public short getMaxLocals() { |
| 181 | return (short) maxLocals; |
| 182 | } |
| 183 | |
| 184 | /** It's necessary to be able to specify the number of arguments at |
| 185 | the beginning of the method (which translates to the initial |
| 186 | value of max locals) */ |
| 187 | public void setMaxLocals(int maxLocals) { |
| 188 | this.maxLocals = maxLocals; |
| 189 | } |
| 190 | |
| 191 | /** Needed to do flow control. Returns current stack depth. */ |
| 192 | public int getStack() { |
| 193 | return stack; |
| 194 | } |
| 195 | |
| 196 | /** Needed to do flow control. */ |
| 197 | public void setStack(int value) { |
| 198 | stack = value; |
| 199 | if (stack > maxStack) { |
| 200 | maxStack = stack; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | /////////////// |
| 205 | // Constants // |
| 206 | /////////////// |
| 207 | |
| 208 | public void opc_aconst_null() { |
| 209 | emitByte(opc_aconst_null); |
| 210 | incStack(); |
| 211 | } |
| 212 | |
| 213 | public void opc_sipush(short constant) { |
| 214 | emitByte(opc_sipush); |
| 215 | emitShort(constant); |
| 216 | incStack(); |
| 217 | } |
| 218 | |
| 219 | public void opc_ldc(byte cpIdx) { |
| 220 | emitByte(opc_ldc); |
| 221 | emitByte(cpIdx); |
| 222 | incStack(); |
| 223 | } |
| 224 | |
| 225 | ///////////////////////////////////// |
| 226 | // Local variable loads and stores // |
| 227 | ///////////////////////////////////// |
| 228 | |
| 229 | public void opc_iload_0() { |
| 230 | emitByte(opc_iload_0); |
| 231 | if (maxLocals < 1) maxLocals = 1; |
| 232 | incStack(); |
| 233 | } |
| 234 | |
| 235 | public void opc_iload_1() { |
| 236 | emitByte(opc_iload_1); |
| 237 | if (maxLocals < 2) maxLocals = 2; |
| 238 | incStack(); |
| 239 | } |
| 240 | |
| 241 | public void opc_iload_2() { |
| 242 | emitByte(opc_iload_2); |
| 243 | if (maxLocals < 3) maxLocals = 3; |
| 244 | incStack(); |
| 245 | } |
| 246 | |
| 247 | public void opc_iload_3() { |
| 248 | emitByte(opc_iload_3); |
| 249 | if (maxLocals < 4) maxLocals = 4; |
| 250 | incStack(); |
| 251 | } |
| 252 | |
| 253 | public void opc_lload_0() { |
| 254 | emitByte(opc_lload_0); |
| 255 | if (maxLocals < 2) maxLocals = 2; |
| 256 | incStack(); |
| 257 | incStack(); |
| 258 | } |
| 259 | |
| 260 | public void opc_lload_1() { |
| 261 | emitByte(opc_lload_1); |
| 262 | if (maxLocals < 3) maxLocals = 3; |
| 263 | incStack(); |
| 264 | incStack(); |
| 265 | } |
| 266 | |
| 267 | public void opc_lload_2() { |
| 268 | emitByte(opc_lload_2); |
| 269 | if (maxLocals < 4) maxLocals = 4; |
| 270 | incStack(); |
| 271 | incStack(); |
| 272 | } |
| 273 | |
| 274 | public void opc_lload_3() { |
| 275 | emitByte(opc_lload_3); |
| 276 | if (maxLocals < 5) maxLocals = 5; |
| 277 | incStack(); |
| 278 | incStack(); |
| 279 | } |
| 280 | |
| 281 | public void opc_fload_0() { |
| 282 | emitByte(opc_fload_0); |
| 283 | if (maxLocals < 1) maxLocals = 1; |
| 284 | incStack(); |
| 285 | } |
| 286 | |
| 287 | public void opc_fload_1() { |
| 288 | emitByte(opc_fload_1); |
| 289 | if (maxLocals < 2) maxLocals = 2; |
| 290 | incStack(); |
| 291 | } |
| 292 | |
| 293 | public void opc_fload_2() { |
| 294 | emitByte(opc_fload_2); |
| 295 | if (maxLocals < 3) maxLocals = 3; |
| 296 | incStack(); |
| 297 | } |
| 298 | |
| 299 | public void opc_fload_3() { |
| 300 | emitByte(opc_fload_3); |
| 301 | if (maxLocals < 4) maxLocals = 4; |
| 302 | incStack(); |
| 303 | } |
| 304 | |
| 305 | public void opc_dload_0() { |
| 306 | emitByte(opc_dload_0); |
| 307 | if (maxLocals < 2) maxLocals = 2; |
| 308 | incStack(); |
| 309 | incStack(); |
| 310 | } |
| 311 | |
| 312 | public void opc_dload_1() { |
| 313 | emitByte(opc_dload_1); |
| 314 | if (maxLocals < 3) maxLocals = 3; |
| 315 | incStack(); |
| 316 | incStack(); |
| 317 | } |
| 318 | |
| 319 | public void opc_dload_2() { |
| 320 | emitByte(opc_dload_2); |
| 321 | if (maxLocals < 4) maxLocals = 4; |
| 322 | incStack(); |
| 323 | incStack(); |
| 324 | } |
| 325 | |
| 326 | public void opc_dload_3() { |
| 327 | emitByte(opc_dload_3); |
| 328 | if (maxLocals < 5) maxLocals = 5; |
| 329 | incStack(); |
| 330 | incStack(); |
| 331 | } |
| 332 | |
| 333 | public void opc_aload_0() { |
| 334 | emitByte(opc_aload_0); |
| 335 | if (maxLocals < 1) maxLocals = 1; |
| 336 | incStack(); |
| 337 | } |
| 338 | |
| 339 | public void opc_aload_1() { |
| 340 | emitByte(opc_aload_1); |
| 341 | if (maxLocals < 2) maxLocals = 2; |
| 342 | incStack(); |
| 343 | } |
| 344 | |
| 345 | public void opc_aload_2() { |
| 346 | emitByte(opc_aload_2); |
| 347 | if (maxLocals < 3) maxLocals = 3; |
| 348 | incStack(); |
| 349 | } |
| 350 | |
| 351 | public void opc_aload_3() { |
| 352 | emitByte(opc_aload_3); |
| 353 | if (maxLocals < 4) maxLocals = 4; |
| 354 | incStack(); |
| 355 | } |
| 356 | |
| 357 | public void opc_aaload() { |
| 358 | emitByte(opc_aaload); |
| 359 | decStack(); |
| 360 | } |
| 361 | |
| 362 | public void opc_astore_0() { |
| 363 | emitByte(opc_astore_0); |
| 364 | if (maxLocals < 1) maxLocals = 1; |
| 365 | decStack(); |
| 366 | } |
| 367 | |
| 368 | public void opc_astore_1() { |
| 369 | emitByte(opc_astore_1); |
| 370 | if (maxLocals < 2) maxLocals = 2; |
| 371 | decStack(); |
| 372 | } |
| 373 | |
| 374 | public void opc_astore_2() { |
| 375 | emitByte(opc_astore_2); |
| 376 | if (maxLocals < 3) maxLocals = 3; |
| 377 | decStack(); |
| 378 | } |
| 379 | |
| 380 | public void opc_astore_3() { |
| 381 | emitByte(opc_astore_3); |
| 382 | if (maxLocals < 4) maxLocals = 4; |
| 383 | decStack(); |
| 384 | } |
| 385 | |
| 386 | //////////////////////// |
| 387 | // Stack manipulation // |
| 388 | //////////////////////// |
| 389 | |
| 390 | public void opc_pop() { |
| 391 | emitByte(opc_pop); |
| 392 | decStack(); |
| 393 | } |
| 394 | |
| 395 | public void opc_dup() { |
| 396 | emitByte(opc_dup); |
| 397 | incStack(); |
| 398 | } |
| 399 | |
| 400 | public void opc_dup_x1() { |
| 401 | emitByte(opc_dup_x1); |
| 402 | incStack(); |
| 403 | } |
| 404 | |
| 405 | public void opc_swap() { |
| 406 | emitByte(opc_swap); |
| 407 | } |
| 408 | |
| 409 | /////////////////////////////// |
| 410 | // Widening conversions only // |
| 411 | /////////////////////////////// |
| 412 | |
| 413 | public void opc_i2l() { |
| 414 | emitByte(opc_i2l); |
| 415 | } |
| 416 | |
| 417 | public void opc_i2f() { |
| 418 | emitByte(opc_i2f); |
| 419 | } |
| 420 | |
| 421 | public void opc_i2d() { |
| 422 | emitByte(opc_i2d); |
| 423 | } |
| 424 | |
| 425 | public void opc_l2f() { |
| 426 | emitByte(opc_l2f); |
| 427 | } |
| 428 | |
| 429 | public void opc_l2d() { |
| 430 | emitByte(opc_l2d); |
| 431 | } |
| 432 | |
| 433 | public void opc_f2d() { |
| 434 | emitByte(opc_f2d); |
| 435 | } |
| 436 | |
| 437 | ////////////////// |
| 438 | // Control flow // |
| 439 | ////////////////// |
| 440 | |
| 441 | public void opc_ifeq(short bciOffset) { |
| 442 | emitByte(opc_ifeq); |
| 443 | emitShort(bciOffset); |
| 444 | decStack(); |
| 445 | } |
| 446 | |
| 447 | /** Control flow with forward-reference BCI. Stack assumes |
| 448 | straight-through control flow. */ |
| 449 | public void opc_ifeq(Label l) { |
| 450 | short instrBCI = getLength(); |
| 451 | emitByte(opc_ifeq); |
| 452 | l.add(this, instrBCI, getLength(), getStack() - 1); |
| 453 | emitShort((short) -1); // Must be patched later |
| 454 | } |
| 455 | |
| 456 | public void opc_if_icmpeq(short bciOffset) { |
| 457 | emitByte(opc_if_icmpeq); |
| 458 | emitShort(bciOffset); |
| 459 | setStack(getStack() - 2); |
| 460 | } |
| 461 | |
| 462 | /** Control flow with forward-reference BCI. Stack assumes straight |
| 463 | control flow. */ |
| 464 | public void opc_if_icmpeq(Label l) { |
| 465 | short instrBCI = getLength(); |
| 466 | emitByte(opc_if_icmpeq); |
| 467 | l.add(this, instrBCI, getLength(), getStack() - 2); |
| 468 | emitShort((short) -1); // Must be patched later |
| 469 | } |
| 470 | |
| 471 | public void opc_goto(short bciOffset) { |
| 472 | emitByte(opc_goto); |
| 473 | emitShort(bciOffset); |
| 474 | } |
| 475 | |
| 476 | /** Control flow with forward-reference BCI. Stack assumes straight |
| 477 | control flow. */ |
| 478 | public void opc_goto(Label l) { |
| 479 | short instrBCI = getLength(); |
| 480 | emitByte(opc_goto); |
| 481 | l.add(this, instrBCI, getLength(), getStack()); |
| 482 | emitShort((short) -1); // Must be patched later |
| 483 | } |
| 484 | |
| 485 | public void opc_ifnull(short bciOffset) { |
| 486 | emitByte(opc_ifnull); |
| 487 | emitShort(bciOffset); |
| 488 | decStack(); |
| 489 | } |
| 490 | |
| 491 | /** Control flow with forward-reference BCI. Stack assumes straight |
| 492 | control flow. */ |
| 493 | public void opc_ifnull(Label l) { |
| 494 | short instrBCI = getLength(); |
| 495 | emitByte(opc_ifnull); |
| 496 | l.add(this, instrBCI, getLength(), getStack() - 1); |
| 497 | emitShort((short) -1); // Must be patched later |
| 498 | decStack(); |
| 499 | } |
| 500 | |
| 501 | public void opc_ifnonnull(short bciOffset) { |
| 502 | emitByte(opc_ifnonnull); |
| 503 | emitShort(bciOffset); |
| 504 | decStack(); |
| 505 | } |
| 506 | |
| 507 | /** Control flow with forward-reference BCI. Stack assumes straight |
| 508 | control flow. */ |
| 509 | public void opc_ifnonnull(Label l) { |
| 510 | short instrBCI = getLength(); |
| 511 | emitByte(opc_ifnonnull); |
| 512 | l.add(this, instrBCI, getLength(), getStack() - 1); |
| 513 | emitShort((short) -1); // Must be patched later |
| 514 | decStack(); |
| 515 | } |
| 516 | |
| 517 | ///////////////////////// |
| 518 | // Return instructions // |
| 519 | ///////////////////////// |
| 520 | |
| 521 | public void opc_ireturn() { |
| 522 | emitByte(opc_ireturn); |
| 523 | setStack(0); |
| 524 | } |
| 525 | |
| 526 | public void opc_lreturn() { |
| 527 | emitByte(opc_lreturn); |
| 528 | setStack(0); |
| 529 | } |
| 530 | |
| 531 | public void opc_freturn() { |
| 532 | emitByte(opc_freturn); |
| 533 | setStack(0); |
| 534 | } |
| 535 | |
| 536 | public void opc_dreturn() { |
| 537 | emitByte(opc_dreturn); |
| 538 | setStack(0); |
| 539 | } |
| 540 | |
| 541 | public void opc_areturn() { |
| 542 | emitByte(opc_areturn); |
| 543 | setStack(0); |
| 544 | } |
| 545 | |
| 546 | public void opc_return() { |
| 547 | emitByte(opc_return); |
| 548 | setStack(0); |
| 549 | } |
| 550 | |
| 551 | ////////////////////// |
| 552 | // Field operations // |
| 553 | ////////////////////// |
| 554 | |
| 555 | public void opc_getstatic(short fieldIndex, int fieldSizeInStackSlots) { |
| 556 | emitByte(opc_getstatic); |
| 557 | emitShort(fieldIndex); |
| 558 | setStack(getStack() + fieldSizeInStackSlots); |
| 559 | } |
| 560 | |
| 561 | public void opc_putstatic(short fieldIndex, int fieldSizeInStackSlots) { |
| 562 | emitByte(opc_putstatic); |
| 563 | emitShort(fieldIndex); |
| 564 | setStack(getStack() - fieldSizeInStackSlots); |
| 565 | } |
| 566 | |
| 567 | public void opc_getfield(short fieldIndex, int fieldSizeInStackSlots) { |
| 568 | emitByte(opc_getfield); |
| 569 | emitShort(fieldIndex); |
| 570 | setStack(getStack() + fieldSizeInStackSlots - 1); |
| 571 | } |
| 572 | |
| 573 | public void opc_putfield(short fieldIndex, int fieldSizeInStackSlots) { |
| 574 | emitByte(opc_putfield); |
| 575 | emitShort(fieldIndex); |
| 576 | setStack(getStack() - fieldSizeInStackSlots - 1); |
| 577 | } |
| 578 | |
| 579 | //////////////////////// |
| 580 | // Method invocations // |
| 581 | //////////////////////// |
| 582 | |
| 583 | /** Long and double arguments and return types count as 2 arguments; |
| 584 | other values count as 1. */ |
| 585 | public void opc_invokevirtual(short methodIndex, |
| 586 | int numArgs, |
| 587 | int numReturnValues) |
| 588 | { |
| 589 | emitByte(opc_invokevirtual); |
| 590 | emitShort(methodIndex); |
| 591 | setStack(getStack() - numArgs - 1 + numReturnValues); |
| 592 | } |
| 593 | |
| 594 | /** Long and double arguments and return types count as 2 arguments; |
| 595 | other values count as 1. */ |
| 596 | public void opc_invokespecial(short methodIndex, |
| 597 | int numArgs, |
| 598 | int numReturnValues) |
| 599 | { |
| 600 | emitByte(opc_invokespecial); |
| 601 | emitShort(methodIndex); |
| 602 | setStack(getStack() - numArgs - 1 + numReturnValues); |
| 603 | } |
| 604 | |
| 605 | /** Long and double arguments and return types count as 2 arguments; |
| 606 | other values count as 1. */ |
| 607 | public void opc_invokestatic(short methodIndex, |
| 608 | int numArgs, |
| 609 | int numReturnValues) |
| 610 | { |
| 611 | emitByte(opc_invokestatic); |
| 612 | emitShort(methodIndex); |
| 613 | setStack(getStack() - numArgs + numReturnValues); |
| 614 | } |
| 615 | |
| 616 | /** Long and double arguments and return types count as 2 arguments; |
| 617 | other values count as 1. */ |
| 618 | public void opc_invokeinterface(short methodIndex, |
| 619 | int numArgs, |
| 620 | byte count, |
| 621 | int numReturnValues) |
| 622 | { |
| 623 | emitByte(opc_invokeinterface); |
| 624 | emitShort(methodIndex); |
| 625 | emitByte(count); |
| 626 | emitByte((byte) 0); |
| 627 | setStack(getStack() - numArgs - 1 + numReturnValues); |
| 628 | } |
| 629 | |
| 630 | ////////////////// |
| 631 | // Array length // |
| 632 | ////////////////// |
| 633 | |
| 634 | public void opc_arraylength() { |
| 635 | emitByte(opc_arraylength); |
| 636 | } |
| 637 | |
| 638 | ///////// |
| 639 | // New // |
| 640 | ///////// |
| 641 | |
| 642 | public void opc_new(short classIndex) { |
| 643 | emitByte(opc_new); |
| 644 | emitShort(classIndex); |
| 645 | incStack(); |
| 646 | } |
| 647 | |
| 648 | //////////// |
| 649 | // Athrow // |
| 650 | //////////// |
| 651 | |
| 652 | public void opc_athrow() { |
| 653 | emitByte(opc_athrow); |
| 654 | setStack(1); |
| 655 | } |
| 656 | |
| 657 | ////////////////////////////// |
| 658 | // Checkcast and instanceof // |
| 659 | ////////////////////////////// |
| 660 | |
| 661 | /** Assumes the checkcast succeeds */ |
| 662 | public void opc_checkcast(short classIndex) { |
| 663 | emitByte(opc_checkcast); |
| 664 | emitShort(classIndex); |
| 665 | } |
| 666 | |
| 667 | public void opc_instanceof(short classIndex) { |
| 668 | emitByte(opc_instanceof); |
| 669 | emitShort(classIndex); |
| 670 | } |
| 671 | } |