Mon, 28 Feb 2011 11:48:53 +0000
7015430: Incorrect thrown type determined for unchecked invocations
Summary: Thrown types do not get updated after 15.12.2.8, and do not get erased as per 15.12.2.6
Reviewed-by: jjg, dlsmith
duke@1 | 1 | /* |
jjg@816 | 2 | * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.jvm; |
duke@1 | 27 | |
duke@1 | 28 | import com.sun.tools.javac.code.*; |
duke@1 | 29 | import com.sun.tools.javac.code.Symbol.*; |
duke@1 | 30 | import com.sun.tools.javac.code.Type.*; |
duke@1 | 31 | import com.sun.tools.javac.jvm.Code.*; |
duke@1 | 32 | import com.sun.tools.javac.tree.JCTree; |
jjg@816 | 33 | import com.sun.tools.javac.util.Assert; |
duke@1 | 34 | |
duke@1 | 35 | import static com.sun.tools.javac.jvm.ByteCodes.*; |
duke@1 | 36 | |
duke@1 | 37 | /** A helper class for code generation. Items are objects |
duke@1 | 38 | * that stand for addressable entities in the bytecode. Each item |
duke@1 | 39 | * supports a fixed protocol for loading the item on the stack, storing |
duke@1 | 40 | * into it, converting it into a jump condition, and several others. |
duke@1 | 41 | * There are many individual forms of items, such as local, static, |
duke@1 | 42 | * indexed, or instance variables, values on the top of stack, the |
duke@1 | 43 | * special values this or super, etc. Individual items are represented as |
duke@1 | 44 | * inner classes in class Items. |
duke@1 | 45 | * |
jjg@581 | 46 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 47 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 48 | * This code and its internal interfaces are subject to change or |
duke@1 | 49 | * deletion without notice.</b> |
duke@1 | 50 | */ |
duke@1 | 51 | public class Items { |
duke@1 | 52 | |
duke@1 | 53 | /** The current constant pool. |
duke@1 | 54 | */ |
duke@1 | 55 | Pool pool; |
duke@1 | 56 | |
duke@1 | 57 | /** The current code buffer. |
duke@1 | 58 | */ |
duke@1 | 59 | Code code; |
duke@1 | 60 | |
duke@1 | 61 | /** The current symbol table. |
duke@1 | 62 | */ |
duke@1 | 63 | Symtab syms; |
duke@1 | 64 | |
duke@1 | 65 | /** Type utilities. */ |
duke@1 | 66 | Types types; |
duke@1 | 67 | |
duke@1 | 68 | /** Items that exist only once (flyweight pattern). |
duke@1 | 69 | */ |
duke@1 | 70 | private final Item voidItem; |
duke@1 | 71 | private final Item thisItem; |
duke@1 | 72 | private final Item superItem; |
duke@1 | 73 | private final Item[] stackItem = new Item[TypeCodeCount]; |
duke@1 | 74 | |
duke@1 | 75 | public Items(Pool pool, Code code, Symtab syms, Types types) { |
duke@1 | 76 | this.code = code; |
duke@1 | 77 | this.pool = pool; |
duke@1 | 78 | this.types = types; |
duke@1 | 79 | voidItem = new Item(VOIDcode) { |
duke@1 | 80 | public String toString() { return "void"; } |
duke@1 | 81 | }; |
duke@1 | 82 | thisItem = new SelfItem(false); |
duke@1 | 83 | superItem = new SelfItem(true); |
duke@1 | 84 | for (int i = 0; i < VOIDcode; i++) stackItem[i] = new StackItem(i); |
duke@1 | 85 | stackItem[VOIDcode] = voidItem; |
duke@1 | 86 | this.syms = syms; |
duke@1 | 87 | } |
duke@1 | 88 | |
duke@1 | 89 | /** Make a void item |
duke@1 | 90 | */ |
duke@1 | 91 | Item makeVoidItem() { |
duke@1 | 92 | return voidItem; |
duke@1 | 93 | } |
duke@1 | 94 | /** Make an item representing `this'. |
duke@1 | 95 | */ |
duke@1 | 96 | Item makeThisItem() { |
duke@1 | 97 | return thisItem; |
duke@1 | 98 | } |
duke@1 | 99 | |
duke@1 | 100 | /** Make an item representing `super'. |
duke@1 | 101 | */ |
duke@1 | 102 | Item makeSuperItem() { |
duke@1 | 103 | return superItem; |
duke@1 | 104 | } |
duke@1 | 105 | |
duke@1 | 106 | /** Make an item representing a value on stack. |
duke@1 | 107 | * @param type The value's type. |
duke@1 | 108 | */ |
duke@1 | 109 | Item makeStackItem(Type type) { |
duke@1 | 110 | return stackItem[Code.typecode(type)]; |
duke@1 | 111 | } |
duke@1 | 112 | |
duke@1 | 113 | /** Make an item representing an indexed expression. |
duke@1 | 114 | * @param type The expression's type. |
duke@1 | 115 | */ |
duke@1 | 116 | Item makeIndexedItem(Type type) { |
duke@1 | 117 | return new IndexedItem(type); |
duke@1 | 118 | } |
duke@1 | 119 | |
duke@1 | 120 | /** Make an item representing a local variable. |
duke@1 | 121 | * @param v The represented variable. |
duke@1 | 122 | */ |
duke@1 | 123 | LocalItem makeLocalItem(VarSymbol v) { |
duke@1 | 124 | return new LocalItem(v.erasure(types), v.adr); |
duke@1 | 125 | } |
duke@1 | 126 | |
duke@1 | 127 | /** Make an item representing a local anonymous variable. |
duke@1 | 128 | * @param type The represented variable's type. |
duke@1 | 129 | * @param reg The represented variable's register. |
duke@1 | 130 | */ |
duke@1 | 131 | private LocalItem makeLocalItem(Type type, int reg) { |
duke@1 | 132 | return new LocalItem(type, reg); |
duke@1 | 133 | } |
duke@1 | 134 | |
duke@1 | 135 | /** Make an item representing a static variable or method. |
duke@1 | 136 | * @param member The represented symbol. |
duke@1 | 137 | */ |
duke@1 | 138 | Item makeStaticItem(Symbol member) { |
duke@1 | 139 | return new StaticItem(member); |
duke@1 | 140 | } |
duke@1 | 141 | |
duke@1 | 142 | /** Make an item representing an instance variable or method. |
duke@1 | 143 | * @param member The represented symbol. |
duke@1 | 144 | * @param nonvirtual Is the reference not virtual? (true for constructors |
duke@1 | 145 | * and private members). |
duke@1 | 146 | */ |
duke@1 | 147 | Item makeMemberItem(Symbol member, boolean nonvirtual) { |
duke@1 | 148 | return new MemberItem(member, nonvirtual); |
duke@1 | 149 | } |
duke@1 | 150 | |
duke@1 | 151 | /** Make an item representing a literal. |
duke@1 | 152 | * @param type The literal's type. |
duke@1 | 153 | * @param value The literal's value. |
duke@1 | 154 | */ |
duke@1 | 155 | Item makeImmediateItem(Type type, Object value) { |
duke@1 | 156 | return new ImmediateItem(type, value); |
duke@1 | 157 | } |
duke@1 | 158 | |
duke@1 | 159 | /** Make an item representing an assignment expression. |
duke@1 | 160 | * @param lhs The item representing the assignment's left hand side. |
duke@1 | 161 | */ |
duke@1 | 162 | Item makeAssignItem(Item lhs) { |
duke@1 | 163 | return new AssignItem(lhs); |
duke@1 | 164 | } |
duke@1 | 165 | |
duke@1 | 166 | /** Make an item representing a conditional or unconditional jump. |
duke@1 | 167 | * @param opcode The jump's opcode. |
duke@1 | 168 | * @param trueJumps A chain encomassing all jumps that can be taken |
duke@1 | 169 | * if the condition evaluates to true. |
duke@1 | 170 | * @param falseJumps A chain encomassing all jumps that can be taken |
duke@1 | 171 | * if the condition evaluates to false. |
duke@1 | 172 | */ |
duke@1 | 173 | CondItem makeCondItem(int opcode, Chain trueJumps, Chain falseJumps) { |
duke@1 | 174 | return new CondItem(opcode, trueJumps, falseJumps); |
duke@1 | 175 | } |
duke@1 | 176 | |
duke@1 | 177 | /** Make an item representing a conditional or unconditional jump. |
duke@1 | 178 | * @param opcode The jump's opcode. |
duke@1 | 179 | */ |
duke@1 | 180 | CondItem makeCondItem(int opcode) { |
duke@1 | 181 | return makeCondItem(opcode, null, null); |
duke@1 | 182 | } |
duke@1 | 183 | |
duke@1 | 184 | /** The base class of all items, which implements default behavior. |
duke@1 | 185 | */ |
duke@1 | 186 | abstract class Item { |
duke@1 | 187 | |
duke@1 | 188 | /** The type code of values represented by this item. |
duke@1 | 189 | */ |
duke@1 | 190 | int typecode; |
duke@1 | 191 | |
duke@1 | 192 | Item(int typecode) { |
duke@1 | 193 | this.typecode = typecode; |
duke@1 | 194 | } |
duke@1 | 195 | |
duke@1 | 196 | /** Generate code to load this item onto stack. |
duke@1 | 197 | */ |
duke@1 | 198 | Item load() { |
duke@1 | 199 | throw new AssertionError(); |
duke@1 | 200 | } |
duke@1 | 201 | |
duke@1 | 202 | /** Generate code to store top of stack into this item. |
duke@1 | 203 | */ |
duke@1 | 204 | void store() { |
duke@1 | 205 | throw new AssertionError("store unsupported: " + this); |
duke@1 | 206 | } |
duke@1 | 207 | |
duke@1 | 208 | /** Generate code to invoke method represented by this item. |
duke@1 | 209 | */ |
duke@1 | 210 | Item invoke() { |
duke@1 | 211 | throw new AssertionError(this); |
duke@1 | 212 | } |
duke@1 | 213 | |
duke@1 | 214 | /** Generate code to use this item twice. |
duke@1 | 215 | */ |
duke@1 | 216 | void duplicate() {} |
duke@1 | 217 | |
duke@1 | 218 | /** Generate code to avoid having to use this item. |
duke@1 | 219 | */ |
duke@1 | 220 | void drop() {} |
duke@1 | 221 | |
duke@1 | 222 | /** Generate code to stash a copy of top of stack - of typecode toscode - |
duke@1 | 223 | * under this item. |
duke@1 | 224 | */ |
duke@1 | 225 | void stash(int toscode) { |
duke@1 | 226 | stackItem[toscode].duplicate(); |
duke@1 | 227 | } |
duke@1 | 228 | |
duke@1 | 229 | /** Generate code to turn item into a testable condition. |
duke@1 | 230 | */ |
duke@1 | 231 | CondItem mkCond() { |
duke@1 | 232 | load(); |
duke@1 | 233 | return makeCondItem(ifne); |
duke@1 | 234 | } |
duke@1 | 235 | |
duke@1 | 236 | /** Generate code to coerce item to given type code. |
duke@1 | 237 | * @param targetcode The type code to coerce to. |
duke@1 | 238 | */ |
duke@1 | 239 | Item coerce(int targetcode) { |
duke@1 | 240 | if (typecode == targetcode) |
duke@1 | 241 | return this; |
duke@1 | 242 | else { |
duke@1 | 243 | load(); |
duke@1 | 244 | int typecode1 = Code.truncate(typecode); |
duke@1 | 245 | int targetcode1 = Code.truncate(targetcode); |
duke@1 | 246 | if (typecode1 != targetcode1) { |
duke@1 | 247 | int offset = targetcode1 > typecode1 ? targetcode1 - 1 |
duke@1 | 248 | : targetcode1; |
duke@1 | 249 | code.emitop0(i2l + typecode1 * 3 + offset); |
duke@1 | 250 | } |
duke@1 | 251 | if (targetcode != targetcode1) { |
duke@1 | 252 | code.emitop0(int2byte + targetcode - BYTEcode); |
duke@1 | 253 | } |
duke@1 | 254 | return stackItem[targetcode]; |
duke@1 | 255 | } |
duke@1 | 256 | } |
duke@1 | 257 | |
duke@1 | 258 | /** Generate code to coerce item to given type. |
duke@1 | 259 | * @param targettype The type to coerce to. |
duke@1 | 260 | */ |
duke@1 | 261 | Item coerce(Type targettype) { |
duke@1 | 262 | return coerce(Code.typecode(targettype)); |
duke@1 | 263 | } |
duke@1 | 264 | |
duke@1 | 265 | /** Return the width of this item on stack as a number of words. |
duke@1 | 266 | */ |
duke@1 | 267 | int width() { |
duke@1 | 268 | return 0; |
duke@1 | 269 | } |
duke@1 | 270 | |
duke@1 | 271 | public abstract String toString(); |
duke@1 | 272 | } |
duke@1 | 273 | |
duke@1 | 274 | /** An item representing a value on stack. |
duke@1 | 275 | */ |
duke@1 | 276 | class StackItem extends Item { |
duke@1 | 277 | |
duke@1 | 278 | StackItem(int typecode) { |
duke@1 | 279 | super(typecode); |
duke@1 | 280 | } |
duke@1 | 281 | |
duke@1 | 282 | Item load() { |
duke@1 | 283 | return this; |
duke@1 | 284 | } |
duke@1 | 285 | |
duke@1 | 286 | void duplicate() { |
duke@1 | 287 | code.emitop0(width() == 2 ? dup2 : dup); |
duke@1 | 288 | } |
duke@1 | 289 | |
duke@1 | 290 | void drop() { |
duke@1 | 291 | code.emitop0(width() == 2 ? pop2 : pop); |
duke@1 | 292 | } |
duke@1 | 293 | |
duke@1 | 294 | void stash(int toscode) { |
duke@1 | 295 | code.emitop0( |
duke@1 | 296 | (width() == 2 ? dup_x2 : dup_x1) + 3 * (Code.width(toscode) - 1)); |
duke@1 | 297 | } |
duke@1 | 298 | |
duke@1 | 299 | int width() { |
duke@1 | 300 | return Code.width(typecode); |
duke@1 | 301 | } |
duke@1 | 302 | |
duke@1 | 303 | public String toString() { |
duke@1 | 304 | return "stack(" + typecodeNames[typecode] + ")"; |
duke@1 | 305 | } |
duke@1 | 306 | } |
duke@1 | 307 | |
duke@1 | 308 | /** An item representing an indexed expression. |
duke@1 | 309 | */ |
duke@1 | 310 | class IndexedItem extends Item { |
duke@1 | 311 | |
duke@1 | 312 | IndexedItem(Type type) { |
duke@1 | 313 | super(Code.typecode(type)); |
duke@1 | 314 | } |
duke@1 | 315 | |
duke@1 | 316 | Item load() { |
duke@1 | 317 | code.emitop0(iaload + typecode); |
duke@1 | 318 | return stackItem[typecode]; |
duke@1 | 319 | } |
duke@1 | 320 | |
duke@1 | 321 | void store() { |
duke@1 | 322 | code.emitop0(iastore + typecode); |
duke@1 | 323 | } |
duke@1 | 324 | |
duke@1 | 325 | void duplicate() { |
duke@1 | 326 | code.emitop0(dup2); |
duke@1 | 327 | } |
duke@1 | 328 | |
duke@1 | 329 | void drop() { |
duke@1 | 330 | code.emitop0(pop2); |
duke@1 | 331 | } |
duke@1 | 332 | |
duke@1 | 333 | void stash(int toscode) { |
duke@1 | 334 | code.emitop0(dup_x2 + 3 * (Code.width(toscode) - 1)); |
duke@1 | 335 | } |
duke@1 | 336 | |
duke@1 | 337 | int width() { |
duke@1 | 338 | return 2; |
duke@1 | 339 | } |
duke@1 | 340 | |
duke@1 | 341 | public String toString() { |
duke@1 | 342 | return "indexed(" + ByteCodes.typecodeNames[typecode] + ")"; |
duke@1 | 343 | } |
duke@1 | 344 | } |
duke@1 | 345 | |
duke@1 | 346 | /** An item representing `this' or `super'. |
duke@1 | 347 | */ |
duke@1 | 348 | class SelfItem extends Item { |
duke@1 | 349 | |
duke@1 | 350 | /** Flag which determines whether this item represents `this' or `super'. |
duke@1 | 351 | */ |
duke@1 | 352 | boolean isSuper; |
duke@1 | 353 | |
duke@1 | 354 | SelfItem(boolean isSuper) { |
duke@1 | 355 | super(OBJECTcode); |
duke@1 | 356 | this.isSuper = isSuper; |
duke@1 | 357 | } |
duke@1 | 358 | |
duke@1 | 359 | Item load() { |
duke@1 | 360 | code.emitop0(aload_0); |
duke@1 | 361 | return stackItem[typecode]; |
duke@1 | 362 | } |
duke@1 | 363 | |
duke@1 | 364 | public String toString() { |
duke@1 | 365 | return isSuper ? "super" : "this"; |
duke@1 | 366 | } |
duke@1 | 367 | } |
duke@1 | 368 | |
duke@1 | 369 | /** An item representing a local variable. |
duke@1 | 370 | */ |
duke@1 | 371 | class LocalItem extends Item { |
duke@1 | 372 | |
duke@1 | 373 | /** The variable's register. |
duke@1 | 374 | */ |
duke@1 | 375 | int reg; |
duke@1 | 376 | |
duke@1 | 377 | /** The variable's type. |
duke@1 | 378 | */ |
duke@1 | 379 | Type type; |
duke@1 | 380 | |
duke@1 | 381 | LocalItem(Type type, int reg) { |
duke@1 | 382 | super(Code.typecode(type)); |
jjg@816 | 383 | Assert.check(reg >= 0); |
duke@1 | 384 | this.type = type; |
duke@1 | 385 | this.reg = reg; |
duke@1 | 386 | } |
duke@1 | 387 | |
duke@1 | 388 | Item load() { |
duke@1 | 389 | if (reg <= 3) |
duke@1 | 390 | code.emitop0(iload_0 + Code.truncate(typecode) * 4 + reg); |
duke@1 | 391 | else |
duke@1 | 392 | code.emitop1w(iload + Code.truncate(typecode), reg); |
duke@1 | 393 | return stackItem[typecode]; |
duke@1 | 394 | } |
duke@1 | 395 | |
duke@1 | 396 | void store() { |
duke@1 | 397 | if (reg <= 3) |
duke@1 | 398 | code.emitop0(istore_0 + Code.truncate(typecode) * 4 + reg); |
duke@1 | 399 | else |
duke@1 | 400 | code.emitop1w(istore + Code.truncate(typecode), reg); |
duke@1 | 401 | code.setDefined(reg); |
duke@1 | 402 | } |
duke@1 | 403 | |
duke@1 | 404 | void incr(int x) { |
duke@1 | 405 | if (typecode == INTcode && x >= -32768 && x <= 32767) { |
duke@1 | 406 | code.emitop1w(iinc, reg, x); |
duke@1 | 407 | } else { |
duke@1 | 408 | load(); |
duke@1 | 409 | if (x >= 0) { |
duke@1 | 410 | makeImmediateItem(syms.intType, x).load(); |
duke@1 | 411 | code.emitop0(iadd); |
duke@1 | 412 | } else { |
duke@1 | 413 | makeImmediateItem(syms.intType, -x).load(); |
duke@1 | 414 | code.emitop0(isub); |
duke@1 | 415 | } |
duke@1 | 416 | makeStackItem(syms.intType).coerce(typecode); |
duke@1 | 417 | store(); |
duke@1 | 418 | } |
duke@1 | 419 | } |
duke@1 | 420 | |
duke@1 | 421 | public String toString() { |
duke@1 | 422 | return "localItem(type=" + type + "; reg=" + reg + ")"; |
duke@1 | 423 | } |
duke@1 | 424 | } |
duke@1 | 425 | |
duke@1 | 426 | /** An item representing a static variable or method. |
duke@1 | 427 | */ |
duke@1 | 428 | class StaticItem extends Item { |
duke@1 | 429 | |
duke@1 | 430 | /** The represented symbol. |
duke@1 | 431 | */ |
duke@1 | 432 | Symbol member; |
duke@1 | 433 | |
duke@1 | 434 | StaticItem(Symbol member) { |
duke@1 | 435 | super(Code.typecode(member.erasure(types))); |
duke@1 | 436 | this.member = member; |
duke@1 | 437 | } |
duke@1 | 438 | |
duke@1 | 439 | Item load() { |
duke@1 | 440 | code.emitop2(getstatic, pool.put(member)); |
duke@1 | 441 | return stackItem[typecode]; |
duke@1 | 442 | } |
duke@1 | 443 | |
duke@1 | 444 | void store() { |
duke@1 | 445 | code.emitop2(putstatic, pool.put(member)); |
duke@1 | 446 | } |
duke@1 | 447 | |
duke@1 | 448 | Item invoke() { |
duke@1 | 449 | MethodType mtype = (MethodType)member.erasure(types); |
duke@1 | 450 | int rescode = Code.typecode(mtype.restype); |
duke@1 | 451 | code.emitInvokestatic(pool.put(member), mtype); |
duke@1 | 452 | return stackItem[rescode]; |
duke@1 | 453 | } |
duke@1 | 454 | |
duke@1 | 455 | public String toString() { |
duke@1 | 456 | return "static(" + member + ")"; |
duke@1 | 457 | } |
duke@1 | 458 | } |
duke@1 | 459 | |
duke@1 | 460 | /** An item representing an instance variable or method. |
duke@1 | 461 | */ |
duke@1 | 462 | class MemberItem extends Item { |
duke@1 | 463 | |
duke@1 | 464 | /** The represented symbol. |
duke@1 | 465 | */ |
duke@1 | 466 | Symbol member; |
duke@1 | 467 | |
duke@1 | 468 | /** Flag that determines whether or not access is virtual. |
duke@1 | 469 | */ |
duke@1 | 470 | boolean nonvirtual; |
duke@1 | 471 | |
duke@1 | 472 | MemberItem(Symbol member, boolean nonvirtual) { |
duke@1 | 473 | super(Code.typecode(member.erasure(types))); |
duke@1 | 474 | this.member = member; |
duke@1 | 475 | this.nonvirtual = nonvirtual; |
duke@1 | 476 | } |
duke@1 | 477 | |
duke@1 | 478 | Item load() { |
duke@1 | 479 | code.emitop2(getfield, pool.put(member)); |
duke@1 | 480 | return stackItem[typecode]; |
duke@1 | 481 | } |
duke@1 | 482 | |
duke@1 | 483 | void store() { |
duke@1 | 484 | code.emitop2(putfield, pool.put(member)); |
duke@1 | 485 | } |
duke@1 | 486 | |
duke@1 | 487 | Item invoke() { |
duke@1 | 488 | MethodType mtype = (MethodType)member.externalType(types); |
duke@1 | 489 | int rescode = Code.typecode(mtype.restype); |
duke@1 | 490 | if ((member.owner.flags() & Flags.INTERFACE) != 0) { |
duke@1 | 491 | code.emitInvokeinterface(pool.put(member), mtype); |
duke@1 | 492 | } else if (nonvirtual) { |
duke@1 | 493 | code.emitInvokespecial(pool.put(member), mtype); |
duke@1 | 494 | } else { |
duke@1 | 495 | code.emitInvokevirtual(pool.put(member), mtype); |
duke@1 | 496 | } |
duke@1 | 497 | return stackItem[rescode]; |
duke@1 | 498 | } |
duke@1 | 499 | |
duke@1 | 500 | void duplicate() { |
duke@1 | 501 | stackItem[OBJECTcode].duplicate(); |
duke@1 | 502 | } |
duke@1 | 503 | |
duke@1 | 504 | void drop() { |
duke@1 | 505 | stackItem[OBJECTcode].drop(); |
duke@1 | 506 | } |
duke@1 | 507 | |
duke@1 | 508 | void stash(int toscode) { |
duke@1 | 509 | stackItem[OBJECTcode].stash(toscode); |
duke@1 | 510 | } |
duke@1 | 511 | |
duke@1 | 512 | int width() { |
duke@1 | 513 | return 1; |
duke@1 | 514 | } |
duke@1 | 515 | |
duke@1 | 516 | public String toString() { |
duke@1 | 517 | return "member(" + member + (nonvirtual ? " nonvirtual)" : ")"); |
duke@1 | 518 | } |
duke@1 | 519 | } |
duke@1 | 520 | |
duke@1 | 521 | /** An item representing a literal. |
duke@1 | 522 | */ |
duke@1 | 523 | class ImmediateItem extends Item { |
duke@1 | 524 | |
duke@1 | 525 | /** The literal's value. |
duke@1 | 526 | */ |
duke@1 | 527 | Object value; |
duke@1 | 528 | |
duke@1 | 529 | ImmediateItem(Type type, Object value) { |
duke@1 | 530 | super(Code.typecode(type)); |
duke@1 | 531 | this.value = value; |
duke@1 | 532 | } |
duke@1 | 533 | |
duke@1 | 534 | private void ldc() { |
duke@1 | 535 | int idx = pool.put(value); |
duke@1 | 536 | if (typecode == LONGcode || typecode == DOUBLEcode) { |
duke@1 | 537 | code.emitop2(ldc2w, idx); |
duke@1 | 538 | } else if (idx <= 255) { |
duke@1 | 539 | code.emitop1(ldc1, idx); |
duke@1 | 540 | } else { |
duke@1 | 541 | code.emitop2(ldc2, idx); |
duke@1 | 542 | } |
duke@1 | 543 | } |
duke@1 | 544 | |
duke@1 | 545 | Item load() { |
duke@1 | 546 | switch (typecode) { |
duke@1 | 547 | case INTcode: case BYTEcode: case SHORTcode: case CHARcode: |
duke@1 | 548 | int ival = ((Number)value).intValue(); |
duke@1 | 549 | if (-1 <= ival && ival <= 5) |
duke@1 | 550 | code.emitop0(iconst_0 + ival); |
duke@1 | 551 | else if (Byte.MIN_VALUE <= ival && ival <= Byte.MAX_VALUE) |
duke@1 | 552 | code.emitop1(bipush, ival); |
duke@1 | 553 | else if (Short.MIN_VALUE <= ival && ival <= Short.MAX_VALUE) |
duke@1 | 554 | code.emitop2(sipush, ival); |
duke@1 | 555 | else |
duke@1 | 556 | ldc(); |
duke@1 | 557 | break; |
duke@1 | 558 | case LONGcode: |
duke@1 | 559 | long lval = ((Number)value).longValue(); |
duke@1 | 560 | if (lval == 0 || lval == 1) |
duke@1 | 561 | code.emitop0(lconst_0 + (int)lval); |
duke@1 | 562 | else |
duke@1 | 563 | ldc(); |
duke@1 | 564 | break; |
duke@1 | 565 | case FLOATcode: |
duke@1 | 566 | float fval = ((Number)value).floatValue(); |
duke@1 | 567 | if (isPosZero(fval) || fval == 1.0 || fval == 2.0) |
duke@1 | 568 | code.emitop0(fconst_0 + (int)fval); |
duke@1 | 569 | else { |
duke@1 | 570 | ldc(); |
duke@1 | 571 | } |
duke@1 | 572 | break; |
duke@1 | 573 | case DOUBLEcode: |
duke@1 | 574 | double dval = ((Number)value).doubleValue(); |
duke@1 | 575 | if (isPosZero(dval) || dval == 1.0) |
duke@1 | 576 | code.emitop0(dconst_0 + (int)dval); |
duke@1 | 577 | else |
duke@1 | 578 | ldc(); |
duke@1 | 579 | break; |
duke@1 | 580 | case OBJECTcode: |
duke@1 | 581 | ldc(); |
duke@1 | 582 | break; |
duke@1 | 583 | default: |
jjg@816 | 584 | Assert.error(); |
duke@1 | 585 | } |
duke@1 | 586 | return stackItem[typecode]; |
duke@1 | 587 | } |
duke@1 | 588 | //where |
duke@1 | 589 | /** Return true iff float number is positive 0. |
duke@1 | 590 | */ |
duke@1 | 591 | private boolean isPosZero(float x) { |
duke@1 | 592 | return x == 0.0f && 1.0f / x > 0.0f; |
duke@1 | 593 | } |
duke@1 | 594 | /** Return true iff double number is positive 0. |
duke@1 | 595 | */ |
duke@1 | 596 | private boolean isPosZero(double x) { |
duke@1 | 597 | return x == 0.0d && 1.0d / x > 0.0d; |
duke@1 | 598 | } |
duke@1 | 599 | |
duke@1 | 600 | CondItem mkCond() { |
duke@1 | 601 | int ival = ((Number)value).intValue(); |
duke@1 | 602 | return makeCondItem(ival != 0 ? goto_ : dontgoto); |
duke@1 | 603 | } |
duke@1 | 604 | |
duke@1 | 605 | Item coerce(int targetcode) { |
duke@1 | 606 | if (typecode == targetcode) { |
duke@1 | 607 | return this; |
duke@1 | 608 | } else { |
duke@1 | 609 | switch (targetcode) { |
duke@1 | 610 | case INTcode: |
duke@1 | 611 | if (Code.truncate(typecode) == INTcode) |
duke@1 | 612 | return this; |
duke@1 | 613 | else |
duke@1 | 614 | return new ImmediateItem( |
duke@1 | 615 | syms.intType, |
duke@1 | 616 | ((Number)value).intValue()); |
duke@1 | 617 | case LONGcode: |
duke@1 | 618 | return new ImmediateItem( |
duke@1 | 619 | syms.longType, |
duke@1 | 620 | ((Number)value).longValue()); |
duke@1 | 621 | case FLOATcode: |
duke@1 | 622 | return new ImmediateItem( |
duke@1 | 623 | syms.floatType, |
duke@1 | 624 | ((Number)value).floatValue()); |
duke@1 | 625 | case DOUBLEcode: |
duke@1 | 626 | return new ImmediateItem( |
duke@1 | 627 | syms.doubleType, |
duke@1 | 628 | ((Number)value).doubleValue()); |
duke@1 | 629 | case BYTEcode: |
duke@1 | 630 | return new ImmediateItem( |
duke@1 | 631 | syms.byteType, |
duke@1 | 632 | (int)(byte)((Number)value).intValue()); |
duke@1 | 633 | case CHARcode: |
duke@1 | 634 | return new ImmediateItem( |
duke@1 | 635 | syms.charType, |
duke@1 | 636 | (int)(char)((Number)value).intValue()); |
duke@1 | 637 | case SHORTcode: |
duke@1 | 638 | return new ImmediateItem( |
duke@1 | 639 | syms.shortType, |
duke@1 | 640 | (int)(short)((Number)value).intValue()); |
duke@1 | 641 | default: |
duke@1 | 642 | return super.coerce(targetcode); |
duke@1 | 643 | } |
duke@1 | 644 | } |
duke@1 | 645 | } |
duke@1 | 646 | |
duke@1 | 647 | public String toString() { |
duke@1 | 648 | return "immediate(" + value + ")"; |
duke@1 | 649 | } |
duke@1 | 650 | } |
duke@1 | 651 | |
duke@1 | 652 | /** An item representing an assignment expressions. |
duke@1 | 653 | */ |
duke@1 | 654 | class AssignItem extends Item { |
duke@1 | 655 | |
duke@1 | 656 | /** The item representing the assignment's left hand side. |
duke@1 | 657 | */ |
duke@1 | 658 | Item lhs; |
duke@1 | 659 | |
duke@1 | 660 | AssignItem(Item lhs) { |
duke@1 | 661 | super(lhs.typecode); |
duke@1 | 662 | this.lhs = lhs; |
duke@1 | 663 | } |
duke@1 | 664 | |
duke@1 | 665 | Item load() { |
duke@1 | 666 | lhs.stash(typecode); |
duke@1 | 667 | lhs.store(); |
duke@1 | 668 | return stackItem[typecode]; |
duke@1 | 669 | } |
duke@1 | 670 | |
duke@1 | 671 | void duplicate() { |
duke@1 | 672 | load().duplicate(); |
duke@1 | 673 | } |
duke@1 | 674 | |
duke@1 | 675 | void drop() { |
duke@1 | 676 | lhs.store(); |
duke@1 | 677 | } |
duke@1 | 678 | |
duke@1 | 679 | void stash(int toscode) { |
jjg@816 | 680 | Assert.error(); |
duke@1 | 681 | } |
duke@1 | 682 | |
duke@1 | 683 | int width() { |
duke@1 | 684 | return lhs.width() + Code.width(typecode); |
duke@1 | 685 | } |
duke@1 | 686 | |
duke@1 | 687 | public String toString() { |
duke@1 | 688 | return "assign(lhs = " + lhs + ")"; |
duke@1 | 689 | } |
duke@1 | 690 | } |
duke@1 | 691 | |
duke@1 | 692 | /** An item representing a conditional or unconditional jump. |
duke@1 | 693 | */ |
duke@1 | 694 | class CondItem extends Item { |
duke@1 | 695 | |
duke@1 | 696 | /** A chain encomassing all jumps that can be taken |
duke@1 | 697 | * if the condition evaluates to true. |
duke@1 | 698 | */ |
duke@1 | 699 | Chain trueJumps; |
duke@1 | 700 | |
duke@1 | 701 | /** A chain encomassing all jumps that can be taken |
duke@1 | 702 | * if the condition evaluates to false. |
duke@1 | 703 | */ |
duke@1 | 704 | Chain falseJumps; |
duke@1 | 705 | |
duke@1 | 706 | /** The jump's opcode. |
duke@1 | 707 | */ |
duke@1 | 708 | int opcode; |
duke@1 | 709 | |
duke@1 | 710 | /* |
duke@1 | 711 | * An abstract syntax tree of this item. It is needed |
duke@1 | 712 | * for branch entries in 'CharacterRangeTable' attribute. |
duke@1 | 713 | */ |
duke@1 | 714 | JCTree tree; |
duke@1 | 715 | |
duke@1 | 716 | CondItem(int opcode, Chain truejumps, Chain falsejumps) { |
duke@1 | 717 | super(BYTEcode); |
duke@1 | 718 | this.opcode = opcode; |
duke@1 | 719 | this.trueJumps = truejumps; |
duke@1 | 720 | this.falseJumps = falsejumps; |
duke@1 | 721 | } |
duke@1 | 722 | |
duke@1 | 723 | Item load() { |
duke@1 | 724 | Chain trueChain = null; |
duke@1 | 725 | Chain falseChain = jumpFalse(); |
duke@1 | 726 | if (!isFalse()) { |
duke@1 | 727 | code.resolve(trueJumps); |
duke@1 | 728 | code.emitop0(iconst_1); |
duke@1 | 729 | trueChain = code.branch(goto_); |
duke@1 | 730 | } |
duke@1 | 731 | if (falseChain != null) { |
duke@1 | 732 | code.resolve(falseChain); |
duke@1 | 733 | code.emitop0(iconst_0); |
duke@1 | 734 | } |
duke@1 | 735 | code.resolve(trueChain); |
duke@1 | 736 | return stackItem[typecode]; |
duke@1 | 737 | } |
duke@1 | 738 | |
duke@1 | 739 | void duplicate() { |
duke@1 | 740 | load().duplicate(); |
duke@1 | 741 | } |
duke@1 | 742 | |
duke@1 | 743 | void drop() { |
duke@1 | 744 | load().drop(); |
duke@1 | 745 | } |
duke@1 | 746 | |
duke@1 | 747 | void stash(int toscode) { |
jjg@816 | 748 | Assert.error(); |
duke@1 | 749 | } |
duke@1 | 750 | |
duke@1 | 751 | CondItem mkCond() { |
duke@1 | 752 | return this; |
duke@1 | 753 | } |
duke@1 | 754 | |
duke@1 | 755 | Chain jumpTrue() { |
jjg@507 | 756 | if (tree == null) return Code.mergeChains(trueJumps, code.branch(opcode)); |
duke@1 | 757 | // we should proceed further in -Xjcov mode only |
duke@1 | 758 | int startpc = code.curPc(); |
jjg@507 | 759 | Chain c = Code.mergeChains(trueJumps, code.branch(opcode)); |
duke@1 | 760 | code.crt.put(tree, CRTable.CRT_BRANCH_TRUE, startpc, code.curPc()); |
duke@1 | 761 | return c; |
duke@1 | 762 | } |
duke@1 | 763 | |
duke@1 | 764 | Chain jumpFalse() { |
jjg@507 | 765 | if (tree == null) return Code.mergeChains(falseJumps, code.branch(Code.negate(opcode))); |
duke@1 | 766 | // we should proceed further in -Xjcov mode only |
duke@1 | 767 | int startpc = code.curPc(); |
jjg@507 | 768 | Chain c = Code.mergeChains(falseJumps, code.branch(Code.negate(opcode))); |
duke@1 | 769 | code.crt.put(tree, CRTable.CRT_BRANCH_FALSE, startpc, code.curPc()); |
duke@1 | 770 | return c; |
duke@1 | 771 | } |
duke@1 | 772 | |
duke@1 | 773 | CondItem negate() { |
jjg@507 | 774 | CondItem c = new CondItem(Code.negate(opcode), falseJumps, trueJumps); |
duke@1 | 775 | c.tree = tree; |
duke@1 | 776 | return c; |
duke@1 | 777 | } |
duke@1 | 778 | |
duke@1 | 779 | int width() { |
duke@1 | 780 | // a CondItem doesn't have a size on the stack per se. |
duke@1 | 781 | throw new AssertionError(); |
duke@1 | 782 | } |
duke@1 | 783 | |
duke@1 | 784 | boolean isTrue() { |
duke@1 | 785 | return falseJumps == null && opcode == goto_; |
duke@1 | 786 | } |
duke@1 | 787 | |
duke@1 | 788 | boolean isFalse() { |
duke@1 | 789 | return trueJumps == null && opcode == dontgoto; |
duke@1 | 790 | } |
duke@1 | 791 | |
duke@1 | 792 | public String toString() { |
duke@1 | 793 | return "cond(" + Code.mnem(opcode) + ")"; |
duke@1 | 794 | } |
duke@1 | 795 | } |
duke@1 | 796 | } |