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| 1 | /* | ||
| 2 | * Copyright (c) 2001, 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 sun.reflect; | ||
| 27 | |||
| 28 | import java.lang.reflect.*; | ||
| 29 | import sun.misc.Unsafe; | ||
| 30 | |||
| 31 | /** Shared functionality for all accessor generators */ | ||
| 32 | |||
| 33 | class AccessorGenerator implements ClassFileConstants { | ||
| 34 | static final Unsafe unsafe = Unsafe.getUnsafe(); | ||
| 35 | |||
| 36 | // Constants because there's no way to say "short integer constant", | ||
| 37 | // i.e., "1S" | ||
| 38 | protected static final short S0 = (short) 0; | ||
| 39 | protected static final short S1 = (short) 1; | ||
| 40 | protected static final short S2 = (short) 2; | ||
| 41 | protected static final short S3 = (short) 3; | ||
| 42 | protected static final short S4 = (short) 4; | ||
| 43 | protected static final short S5 = (short) 5; | ||
| 44 | protected static final short S6 = (short) 6; | ||
| 45 | |||
| 46 | // Instance variables for shared functionality between | ||
| 47 | // FieldAccessorGenerator and MethodAccessorGenerator | ||
| 48 | protected ClassFileAssembler asm; | ||
| 49 | protected int modifiers; | ||
| 50 | protected short thisClass; | ||
| 51 | protected short superClass; | ||
| 52 | protected short targetClass; | ||
| 53 | // Common constant pool entries to FieldAccessor and MethodAccessor | ||
| 54 | protected short throwableClass; | ||
| 55 | protected short classCastClass; | ||
| 56 | protected short nullPointerClass; | ||
| 57 | protected short illegalArgumentClass; | ||
| 58 | protected short invocationTargetClass; | ||
| 59 | protected short initIdx; | ||
| 60 | protected short initNameAndTypeIdx; | ||
| 61 | protected short initStringNameAndTypeIdx; | ||
| 62 | protected short nullPointerCtorIdx; | ||
| 63 | protected short illegalArgumentCtorIdx; | ||
| 64 | protected short illegalArgumentStringCtorIdx; | ||
| 65 | protected short invocationTargetCtorIdx; | ||
| 66 | protected short superCtorIdx; | ||
| 67 | protected short objectClass; | ||
| 68 | protected short toStringIdx; | ||
| 69 | protected short codeIdx; | ||
| 70 | protected short exceptionsIdx; | ||
| 71 | // Boxing | ||
| 72 | protected short booleanIdx; | ||
| 73 | protected short booleanCtorIdx; | ||
| 74 | protected short booleanUnboxIdx; | ||
| 75 | protected short byteIdx; | ||
| 76 | protected short byteCtorIdx; | ||
| 77 | protected short byteUnboxIdx; | ||
| 78 | protected short characterIdx; | ||
| 79 | protected short characterCtorIdx; | ||
| 80 | protected short characterUnboxIdx; | ||
| 81 | protected short doubleIdx; | ||
| 82 | protected short doubleCtorIdx; | ||
| 83 | protected short doubleUnboxIdx; | ||
| 84 | protected short floatIdx; | ||
| 85 | protected short floatCtorIdx; | ||
| 86 | protected short floatUnboxIdx; | ||
| 87 | protected short integerIdx; | ||
| 88 | protected short integerCtorIdx; | ||
| 89 | protected short integerUnboxIdx; | ||
| 90 | protected short longIdx; | ||
| 91 | protected short longCtorIdx; | ||
| 92 | protected short longUnboxIdx; | ||
| 93 | protected short shortIdx; | ||
| 94 | protected short shortCtorIdx; | ||
| 95 | protected short shortUnboxIdx; | ||
| 96 | |||
| 97 | protected final short NUM_COMMON_CPOOL_ENTRIES = (short) 30; | ||
| 98 | protected final short NUM_BOXING_CPOOL_ENTRIES = (short) 72; | ||
| 99 | |||
| 100 | // Requires that superClass has been set up | ||
| 101 | protected void emitCommonConstantPoolEntries() { | ||
| 102 | // + [UTF-8] "java/lang/Throwable" | ||
| 103 | // + [CONSTANT_Class_info] for above | ||
| 104 | // + [UTF-8] "java/lang/ClassCastException" | ||
| 105 | // + [CONSTANT_Class_info] for above | ||
| 106 | // + [UTF-8] "java/lang/NullPointerException" | ||
| 107 | // + [CONSTANT_Class_info] for above | ||
| 108 | // + [UTF-8] "java/lang/IllegalArgumentException" | ||
| 109 | // + [CONSTANT_Class_info] for above | ||
| 110 | // + [UTF-8] "java/lang/InvocationTargetException" | ||
| 111 | // + [CONSTANT_Class_info] for above | ||
| 112 | // + [UTF-8] "<init>" | ||
| 113 | // + [UTF-8] "()V" | ||
| 114 | // + [CONSTANT_NameAndType_info] for above | ||
| 115 | // + [CONSTANT_Methodref_info] for NullPointerException's constructor | ||
| 116 | // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor | ||
| 117 | // + [UTF-8] "(Ljava/lang/String;)V" | ||
| 118 | // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/String;)V" | ||
| 119 | // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor taking a String | ||
| 120 | // + [UTF-8] "(Ljava/lang/Throwable;)V" | ||
| 121 | // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/Throwable;)V" | ||
| 122 | // + [CONSTANT_Methodref_info] for InvocationTargetException's constructor | ||
| 123 | // + [CONSTANT_Methodref_info] for "super()" | ||
| 124 | // + [UTF-8] "java/lang/Object" | ||
| 125 | // + [CONSTANT_Class_info] for above | ||
| 126 | // + [UTF-8] "toString" | ||
| 127 | // + [UTF-8] "()Ljava/lang/String;" | ||
| 128 | // + [CONSTANT_NameAndType_info] for "toString()Ljava/lang/String;" | ||
| 129 | // + [CONSTANT_Methodref_info] for Object's toString method | ||
| 130 | // + [UTF-8] "Code" | ||
| 131 | // + [UTF-8] "Exceptions" | ||
| 132 | asm.emitConstantPoolUTF8("java/lang/Throwable"); | ||
| 133 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 134 | throwableClass = asm.cpi(); | ||
| 135 | asm.emitConstantPoolUTF8("java/lang/ClassCastException"); | ||
| 136 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 137 | classCastClass = asm.cpi(); | ||
| 138 | asm.emitConstantPoolUTF8("java/lang/NullPointerException"); | ||
| 139 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 140 | nullPointerClass = asm.cpi(); | ||
| 141 | asm.emitConstantPoolUTF8("java/lang/IllegalArgumentException"); | ||
| 142 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 143 | illegalArgumentClass = asm.cpi(); | ||
| 144 | asm.emitConstantPoolUTF8("java/lang/reflect/InvocationTargetException"); | ||
| 145 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 146 | invocationTargetClass = asm.cpi(); | ||
| 147 | asm.emitConstantPoolUTF8("<init>"); | ||
| 148 | initIdx = asm.cpi(); | ||
| 149 | asm.emitConstantPoolUTF8("()V"); | ||
| 150 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 151 | initNameAndTypeIdx = asm.cpi(); | ||
| 152 | asm.emitConstantPoolMethodref(nullPointerClass, initNameAndTypeIdx); | ||
| 153 | nullPointerCtorIdx = asm.cpi(); | ||
| 154 | asm.emitConstantPoolMethodref(illegalArgumentClass, initNameAndTypeIdx); | ||
| 155 | illegalArgumentCtorIdx = asm.cpi(); | ||
| 156 | asm.emitConstantPoolUTF8("(Ljava/lang/String;)V"); | ||
| 157 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 158 | initStringNameAndTypeIdx = asm.cpi(); | ||
| 159 | asm.emitConstantPoolMethodref(illegalArgumentClass, initStringNameAndTypeIdx); | ||
| 160 | illegalArgumentStringCtorIdx = asm.cpi(); | ||
| 161 | asm.emitConstantPoolUTF8("(Ljava/lang/Throwable;)V"); | ||
| 162 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 163 | asm.emitConstantPoolMethodref(invocationTargetClass, asm.cpi()); | ||
| 164 | invocationTargetCtorIdx = asm.cpi(); | ||
| 165 | asm.emitConstantPoolMethodref(superClass, initNameAndTypeIdx); | ||
| 166 | superCtorIdx = asm.cpi(); | ||
| 167 | asm.emitConstantPoolUTF8("java/lang/Object"); | ||
| 168 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 169 | objectClass = asm.cpi(); | ||
| 170 | asm.emitConstantPoolUTF8("toString"); | ||
| 171 | asm.emitConstantPoolUTF8("()Ljava/lang/String;"); | ||
| 172 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 173 | asm.emitConstantPoolMethodref(objectClass, asm.cpi()); | ||
| 174 | toStringIdx = asm.cpi(); | ||
| 175 | asm.emitConstantPoolUTF8("Code"); | ||
| 176 | codeIdx = asm.cpi(); | ||
| 177 | asm.emitConstantPoolUTF8("Exceptions"); | ||
| 178 | exceptionsIdx = asm.cpi(); | ||
| 179 | } | ||
| 180 | |||
| 181 | /** Constant pool entries required to be able to box/unbox primitive | ||
| 182 | types. Note that we don't emit these if we don't need them. */ | ||
| 183 | protected void emitBoxingContantPoolEntries() { | ||
| 184 | // * [UTF-8] "java/lang/Boolean" | ||
| 185 | // * [CONSTANT_Class_info] for above | ||
| 186 | // * [UTF-8] "(Z)V" | ||
| 187 | // * [CONSTANT_NameAndType_info] for above | ||
| 188 | // * [CONSTANT_Methodref_info] for above | ||
| 189 | // * [UTF-8] "booleanValue" | ||
| 190 | // * [UTF-8] "()Z" | ||
| 191 | // * [CONSTANT_NameAndType_info] for above | ||
| 192 | // * [CONSTANT_Methodref_info] for above | ||
| 193 | // * [UTF-8] "java/lang/Byte" | ||
| 194 | // * [CONSTANT_Class_info] for above | ||
| 195 | // * [UTF-8] "(B)V" | ||
| 196 | // * [CONSTANT_NameAndType_info] for above | ||
| 197 | // * [CONSTANT_Methodref_info] for above | ||
| 198 | // * [UTF-8] "byteValue" | ||
| 199 | // * [UTF-8] "()B" | ||
| 200 | // * [CONSTANT_NameAndType_info] for above | ||
| 201 | // * [CONSTANT_Methodref_info] for above | ||
| 202 | // * [UTF-8] "java/lang/Character" | ||
| 203 | // * [CONSTANT_Class_info] for above | ||
| 204 | // * [UTF-8] "(C)V" | ||
| 205 | // * [CONSTANT_NameAndType_info] for above | ||
| 206 | // * [CONSTANT_Methodref_info] for above | ||
| 207 | // * [UTF-8] "charValue" | ||
| 208 | // * [UTF-8] "()C" | ||
| 209 | // * [CONSTANT_NameAndType_info] for above | ||
| 210 | // * [CONSTANT_Methodref_info] for above | ||
| 211 | // * [UTF-8] "java/lang/Double" | ||
| 212 | // * [CONSTANT_Class_info] for above | ||
| 213 | // * [UTF-8] "(D)V" | ||
| 214 | // * [CONSTANT_NameAndType_info] for above | ||
| 215 | // * [CONSTANT_Methodref_info] for above | ||
| 216 | // * [UTF-8] "doubleValue" | ||
| 217 | // * [UTF-8] "()D" | ||
| 218 | // * [CONSTANT_NameAndType_info] for above | ||
| 219 | // * [CONSTANT_Methodref_info] for above | ||
| 220 | // * [UTF-8] "java/lang/Float" | ||
| 221 | // * [CONSTANT_Class_info] for above | ||
| 222 | // * [UTF-8] "(F)V" | ||
| 223 | // * [CONSTANT_NameAndType_info] for above | ||
| 224 | // * [CONSTANT_Methodref_info] for above | ||
| 225 | // * [UTF-8] "floatValue" | ||
| 226 | // * [UTF-8] "()F" | ||
| 227 | // * [CONSTANT_NameAndType_info] for above | ||
| 228 | // * [CONSTANT_Methodref_info] for above | ||
| 229 | // * [UTF-8] "java/lang/Integer" | ||
| 230 | // * [CONSTANT_Class_info] for above | ||
| 231 | // * [UTF-8] "(I)V" | ||
| 232 | // * [CONSTANT_NameAndType_info] for above | ||
| 233 | // * [CONSTANT_Methodref_info] for above | ||
| 234 | // * [UTF-8] "intValue" | ||
| 235 | // * [UTF-8] "()I" | ||
| 236 | // * [CONSTANT_NameAndType_info] for above | ||
| 237 | // * [CONSTANT_Methodref_info] for above | ||
| 238 | // * [UTF-8] "java/lang/Long" | ||
| 239 | // * [CONSTANT_Class_info] for above | ||
| 240 | // * [UTF-8] "(J)V" | ||
| 241 | // * [CONSTANT_NameAndType_info] for above | ||
| 242 | // * [CONSTANT_Methodref_info] for above | ||
| 243 | // * [UTF-8] "longValue" | ||
| 244 | // * [UTF-8] "()J" | ||
| 245 | // * [CONSTANT_NameAndType_info] for above | ||
| 246 | // * [CONSTANT_Methodref_info] for above | ||
| 247 | // * [UTF-8] "java/lang/Short" | ||
| 248 | // * [CONSTANT_Class_info] for above | ||
| 249 | // * [UTF-8] "(S)V" | ||
| 250 | // * [CONSTANT_NameAndType_info] for above | ||
| 251 | // * [CONSTANT_Methodref_info] for above | ||
| 252 | // * [UTF-8] "shortValue" | ||
| 253 | // * [UTF-8] "()S" | ||
| 254 | // * [CONSTANT_NameAndType_info] for above | ||
| 255 | // * [CONSTANT_Methodref_info] for above | ||
| 256 | // Boolean | ||
| 257 | asm.emitConstantPoolUTF8("java/lang/Boolean"); | ||
| 258 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 259 | booleanIdx = asm.cpi(); | ||
| 260 | asm.emitConstantPoolUTF8("(Z)V"); | ||
| 261 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 262 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 263 | booleanCtorIdx = asm.cpi(); | ||
| 264 | asm.emitConstantPoolUTF8("booleanValue"); | ||
| 265 | asm.emitConstantPoolUTF8("()Z"); | ||
| 266 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 267 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 268 | booleanUnboxIdx = asm.cpi(); | ||
| 269 | |||
| 270 | // Byte | ||
| 271 | asm.emitConstantPoolUTF8("java/lang/Byte"); | ||
| 272 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 273 | byteIdx = asm.cpi(); | ||
| 274 | asm.emitConstantPoolUTF8("(B)V"); | ||
| 275 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 276 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 277 | byteCtorIdx = asm.cpi(); | ||
| 278 | asm.emitConstantPoolUTF8("byteValue"); | ||
| 279 | asm.emitConstantPoolUTF8("()B"); | ||
| 280 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 281 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 282 | byteUnboxIdx = asm.cpi(); | ||
| 283 | |||
| 284 | // Character | ||
| 285 | asm.emitConstantPoolUTF8("java/lang/Character"); | ||
| 286 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 287 | characterIdx = asm.cpi(); | ||
| 288 | asm.emitConstantPoolUTF8("(C)V"); | ||
| 289 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 290 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 291 | characterCtorIdx = asm.cpi(); | ||
| 292 | asm.emitConstantPoolUTF8("charValue"); | ||
| 293 | asm.emitConstantPoolUTF8("()C"); | ||
| 294 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 295 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 296 | characterUnboxIdx = asm.cpi(); | ||
| 297 | |||
| 298 | // Double | ||
| 299 | asm.emitConstantPoolUTF8("java/lang/Double"); | ||
| 300 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 301 | doubleIdx = asm.cpi(); | ||
| 302 | asm.emitConstantPoolUTF8("(D)V"); | ||
| 303 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 304 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 305 | doubleCtorIdx = asm.cpi(); | ||
| 306 | asm.emitConstantPoolUTF8("doubleValue"); | ||
| 307 | asm.emitConstantPoolUTF8("()D"); | ||
| 308 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 309 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 310 | doubleUnboxIdx = asm.cpi(); | ||
| 311 | |||
| 312 | // Float | ||
| 313 | asm.emitConstantPoolUTF8("java/lang/Float"); | ||
| 314 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 315 | floatIdx = asm.cpi(); | ||
| 316 | asm.emitConstantPoolUTF8("(F)V"); | ||
| 317 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 318 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 319 | floatCtorIdx = asm.cpi(); | ||
| 320 | asm.emitConstantPoolUTF8("floatValue"); | ||
| 321 | asm.emitConstantPoolUTF8("()F"); | ||
| 322 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 323 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 324 | floatUnboxIdx = asm.cpi(); | ||
| 325 | |||
| 326 | // Integer | ||
| 327 | asm.emitConstantPoolUTF8("java/lang/Integer"); | ||
| 328 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 329 | integerIdx = asm.cpi(); | ||
| 330 | asm.emitConstantPoolUTF8("(I)V"); | ||
| 331 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 332 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 333 | integerCtorIdx = asm.cpi(); | ||
| 334 | asm.emitConstantPoolUTF8("intValue"); | ||
| 335 | asm.emitConstantPoolUTF8("()I"); | ||
| 336 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 337 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 338 | integerUnboxIdx = asm.cpi(); | ||
| 339 | |||
| 340 | // Long | ||
| 341 | asm.emitConstantPoolUTF8("java/lang/Long"); | ||
| 342 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 343 | longIdx = asm.cpi(); | ||
| 344 | asm.emitConstantPoolUTF8("(J)V"); | ||
| 345 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 346 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 347 | longCtorIdx = asm.cpi(); | ||
| 348 | asm.emitConstantPoolUTF8("longValue"); | ||
| 349 | asm.emitConstantPoolUTF8("()J"); | ||
| 350 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 351 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 352 | longUnboxIdx = asm.cpi(); | ||
| 353 | |||
| 354 | // Short | ||
| 355 | asm.emitConstantPoolUTF8("java/lang/Short"); | ||
| 356 | asm.emitConstantPoolClass(asm.cpi()); | ||
| 357 | shortIdx = asm.cpi(); | ||
| 358 | asm.emitConstantPoolUTF8("(S)V"); | ||
| 359 | asm.emitConstantPoolNameAndType(initIdx, asm.cpi()); | ||
| 360 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi()); | ||
| 361 | shortCtorIdx = asm.cpi(); | ||
| 362 | asm.emitConstantPoolUTF8("shortValue"); | ||
| 363 | asm.emitConstantPoolUTF8("()S"); | ||
| 364 | asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); | ||
| 365 | asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi()); | ||
| 366 | shortUnboxIdx = asm.cpi(); | ||
| 367 | } | ||
| 368 | |||
| 369 | // Necessary because of Java's annoying promotion rules | ||
| 370 | protected static short add(short s1, short s2) { | ||
| 371 | return (short) (s1 + s2); | ||
| 372 | } | ||
| 373 | |||
| 374 | protected static short sub(short s1, short s2) { | ||
| 375 | return (short) (s1 - s2); | ||
| 376 | } | ||
| 377 | |||
| 378 | protected boolean isStatic() { | ||
| 379 | return Modifier.isStatic(modifiers); | ||
| 380 | } | ||
| 381 | |||
| 382 | /** Returns class name in "internal" form (i.e., '/' separators | ||
| 383 | instead of '.') */ | ||
| 384 | protected static String getClassName | ||
| 385 | (Class c, boolean addPrefixAndSuffixForNonPrimitiveTypes) | ||
| 386 | { | ||
| 387 | if (c.isPrimitive()) { | ||
| 388 | if (c == Boolean.TYPE) { | ||
| 389 | return "Z"; | ||
| 390 | } else if (c == Byte.TYPE) { | ||
| 391 | return "B"; | ||
| 392 | } else if (c == Character.TYPE) { | ||
| 393 | return "C"; | ||
| 394 | } else if (c == Double.TYPE) { | ||
| 395 | return "D"; | ||
| 396 | } else if (c == Float.TYPE) { | ||
| 397 | return "F"; | ||
| 398 | } else if (c == Integer.TYPE) { | ||
| 399 | return "I"; | ||
| 400 | } else if (c == Long.TYPE) { | ||
| 401 | return "J"; | ||
| 402 | } else if (c == Short.TYPE) { | ||
| 403 | return "S"; | ||
| 404 | } else if (c == Void.TYPE) { | ||
| 405 | return "V"; | ||
| 406 | } | ||
| 407 | throw new InternalError("Should have found primitive type"); | ||
| 408 | } else if (c.isArray()) { | ||
| 409 | return "[" + getClassName(c.getComponentType(), true); | ||
| 410 | } else { | ||
| 411 | if (addPrefixAndSuffixForNonPrimitiveTypes) { | ||
| 412 | return internalize("L" + c.getName() + ";"); | ||
| 413 | } else { | ||
| 414 | return internalize(c.getName()); | ||
| 415 | } | ||
| 416 | } | ||
| 417 | } | ||
| 418 | |||
| 419 | private static String internalize(String className) { | ||
| 420 | return className.replace('.', '/'); | ||
| 421 | } | ||
| 422 | |||
| 423 | protected void emitConstructor() { | ||
| 424 | // Generate code into fresh code buffer | ||
| 425 | ClassFileAssembler cb = new ClassFileAssembler(); | ||
| 426 | // 0 incoming arguments | ||
| 427 | cb.setMaxLocals(1); | ||
| 428 | cb.opc_aload_0(); | ||
| 429 | cb.opc_invokespecial(superCtorIdx, 0, 0); | ||
| 430 | cb.opc_return(); | ||
| 431 | |||
| 432 | // Emit method | ||
| 433 | emitMethod(initIdx, cb.getMaxLocals(), cb, null, null); | ||
| 434 | } | ||
| 435 | |||
| 436 | // The descriptor's index in the constant pool must be (1 + | ||
| 437 | // nameIdx). "numArgs" must indicate ALL arguments, including the | ||
| 438 | // implicit "this" argument; double and long arguments each count | ||
| 439 | // as 2 in this count. The code buffer must NOT contain the code | ||
| 440 | // length. The exception table may be null, but if non-null must | ||
| 441 | // NOT contain the exception table's length. The checked exception | ||
| 442 | // indices may be null. | ||
| 443 | protected void emitMethod(short nameIdx, | ||
| 444 | int numArgs, | ||
| 445 | ClassFileAssembler code, | ||
| 446 | ClassFileAssembler exceptionTable, | ||
| 447 | short[] checkedExceptionIndices) | ||
| 448 | { | ||
| 449 | int codeLen = code.getLength(); | ||
| 450 | int excLen = 0; | ||
| 451 | if (exceptionTable != null) { | ||
| 452 | excLen = exceptionTable.getLength(); | ||
| 453 | if ((excLen % 8) != 0) { | ||
| 454 | throw new IllegalArgumentException("Illegal exception table"); | ||
| 455 | } | ||
| 456 | } | ||
| 457 | int attrLen = 12 + codeLen + excLen; | ||
| 458 | excLen = excLen / 8; // No-op if no exception table | ||
| 459 | |||
| 460 | asm.emitShort(ACC_PUBLIC); | ||
| 461 | asm.emitShort(nameIdx); | ||
| 462 | asm.emitShort(add(nameIdx, S1)); | ||
| 463 | if (checkedExceptionIndices == null) { | ||
| 464 | // Code attribute only | ||
| 465 | asm.emitShort(S1); | ||
| 466 | } else { | ||
| 467 | // Code and Exceptions attributes | ||
| 468 | asm.emitShort(S2); | ||
| 469 | } | ||
| 470 | // Code attribute | ||
| 471 | asm.emitShort(codeIdx); | ||
| 472 | asm.emitInt(attrLen); | ||
| 473 | asm.emitShort(code.getMaxStack()); | ||
| 474 | asm.emitShort((short) Math.max(numArgs, code.getMaxLocals())); | ||
| 475 | asm.emitInt(codeLen); | ||
| 476 | asm.append(code); | ||
| 477 | asm.emitShort((short) excLen); | ||
| 478 | if (exceptionTable != null) { | ||
| 479 | asm.append(exceptionTable); | ||
| 480 | } | ||
| 481 | asm.emitShort(S0); // No additional attributes for Code attribute | ||
| 482 | if (checkedExceptionIndices != null) { | ||
| 483 | // Exceptions attribute | ||
| 484 | asm.emitShort(exceptionsIdx); | ||
| 485 | asm.emitInt(2 + 2 * checkedExceptionIndices.length); | ||
| 486 | asm.emitShort((short) checkedExceptionIndices.length); | ||
| 487 | for (int i = 0; i < checkedExceptionIndices.length; i++) { | ||
| 488 | asm.emitShort(checkedExceptionIndices[i]); | ||
| 489 | } | ||
| 490 | } | ||
| 491 | } | ||
| 492 | |||
| 493 | protected short indexForPrimitiveType(Class type) { | ||
| 494 | if (type == Boolean.TYPE) { | ||
| 495 | return booleanIdx; | ||
| 496 | } else if (type == Byte.TYPE) { | ||
| 497 | return byteIdx; | ||
| 498 | } else if (type == Character.TYPE) { | ||
| 499 | return characterIdx; | ||
| 500 | } else if (type == Double.TYPE) { | ||
| 501 | return doubleIdx; | ||
| 502 | } else if (type == Float.TYPE) { | ||
| 503 | return floatIdx; | ||
| 504 | } else if (type == Integer.TYPE) { | ||
| 505 | return integerIdx; | ||
| 506 | } else if (type == Long.TYPE) { | ||
| 507 | return longIdx; | ||
| 508 | } else if (type == Short.TYPE) { | ||
| 509 | return shortIdx; | ||
| 510 | } | ||
| 511 | throw new InternalError("Should have found primitive type"); | ||
| 512 | } | ||
| 513 | |||
| 514 | protected short ctorIndexForPrimitiveType(Class type) { | ||
| 515 | if (type == Boolean.TYPE) { | ||
| 516 | return booleanCtorIdx; | ||
| 517 | } else if (type == Byte.TYPE) { | ||
| 518 | return byteCtorIdx; | ||
| 519 | } else if (type == Character.TYPE) { | ||
| 520 | return characterCtorIdx; | ||
| 521 | } else if (type == Double.TYPE) { | ||
| 522 | return doubleCtorIdx; | ||
| 523 | } else if (type == Float.TYPE) { | ||
| 524 | return floatCtorIdx; | ||
| 525 | } else if (type == Integer.TYPE) { | ||
| 526 | return integerCtorIdx; | ||
| 527 | } else if (type == Long.TYPE) { | ||
| 528 | return longCtorIdx; | ||
| 529 | } else if (type == Short.TYPE) { | ||
| 530 | return shortCtorIdx; | ||
| 531 | } | ||
| 532 | throw new InternalError("Should have found primitive type"); | ||
| 533 | } | ||
| 534 | |||
| 535 | /** Returns true for widening or identity conversions for primitive | ||
| 536 | types only */ | ||
| 537 | protected static boolean canWidenTo(Class type, Class otherType) { | ||
| 538 | if (!type.isPrimitive()) { | ||
| 539 | return false; | ||
| 540 | } | ||
| 541 | |||
| 542 | // Widening conversions (from JVM spec): | ||
| 543 | // byte to short, int, long, float, or double | ||
| 544 | // short to int, long, float, or double | ||
| 545 | // char to int, long, float, or double | ||
| 546 | // int to long, float, or double | ||
| 547 | // long to float or double | ||
| 548 | // float to double | ||
| 549 | |||
| 550 | if (type == Boolean.TYPE) { | ||
| 551 | if (otherType == Boolean.TYPE) { | ||
| 552 | return true; | ||
| 553 | } | ||
| 554 | } else if (type == Byte.TYPE) { | ||
| 555 | if ( otherType == Byte.TYPE | ||
| 556 | || otherType == Short.TYPE | ||
| 557 | || otherType == Integer.TYPE | ||
| 558 | || otherType == Long.TYPE | ||
| 559 | || otherType == Float.TYPE | ||
| 560 | || otherType == Double.TYPE) { | ||
| 561 | return true; | ||
| 562 | } | ||
| 563 | } else if (type == Short.TYPE) { | ||
| 564 | if ( otherType == Short.TYPE | ||
| 565 | || otherType == Integer.TYPE | ||
| 566 | || otherType == Long.TYPE | ||
| 567 | || otherType == Float.TYPE | ||
| 568 | || otherType == Double.TYPE) { | ||
| 569 | return true; | ||
| 570 | } | ||
| 571 | } else if (type == Character.TYPE) { | ||
| 572 | if ( otherType == Character.TYPE | ||
| 573 | || otherType == Integer.TYPE | ||
| 574 | || otherType == Long.TYPE | ||
| 575 | || otherType == Float.TYPE | ||
| 576 | || otherType == Double.TYPE) { | ||
| 577 | return true; | ||
| 578 | } | ||
| 579 | } else if (type == Integer.TYPE) { | ||
| 580 | if ( otherType == Integer.TYPE | ||
| 581 | || otherType == Long.TYPE | ||
| 582 | || otherType == Float.TYPE | ||
| 583 | || otherType == Double.TYPE) { | ||
| 584 | return true; | ||
| 585 | } | ||
| 586 | } else if (type == Long.TYPE) { | ||
| 587 | if ( otherType == Long.TYPE | ||
| 588 | || otherType == Float.TYPE | ||
| 589 | || otherType == Double.TYPE) { | ||
| 590 | return true; | ||
| 591 | } | ||
| 592 | } else if (type == Float.TYPE) { | ||
| 593 | if ( otherType == Float.TYPE | ||
| 594 | || otherType == Double.TYPE) { | ||
| 595 | return true; | ||
| 596 | } | ||
| 597 | } else if (type == Double.TYPE) { | ||
| 598 | if (otherType == Double.TYPE) { | ||
| 599 | return true; | ||
| 600 | } | ||
| 601 | } | ||
| 602 | |||
| 603 | return false; | ||
| 604 | } | ||
| 605 | |||
| 606 | /** Emits the widening bytecode for the given primitive conversion | ||
| 607 | (or none if the identity conversion). Requires that a primitive | ||
| 608 | conversion exists; i.e., canWidenTo must have already been | ||
| 609 | called and returned true. */ | ||
| 610 | protected static void emitWideningBytecodeForPrimitiveConversion | ||
| 611 | (ClassFileAssembler cb, | ||
| 612 | Class fromType, | ||
| 613 | Class toType) | ||
| 614 | { | ||
| 615 | // Note that widening conversions for integral types (i.e., "b2s", | ||
| 616 | // "s2i") are no-ops since values on the Java stack are | ||
| 617 | // sign-extended. | ||
| 618 | |||
| 619 | // Widening conversions (from JVM spec): | ||
| 620 | // byte to short, int, long, float, or double | ||
| 621 | // short to int, long, float, or double | ||
| 622 | // char to int, long, float, or double | ||
| 623 | // int to long, float, or double | ||
| 624 | // long to float or double | ||
| 625 | // float to double | ||
| 626 | |||
| 627 | if ( fromType == Byte.TYPE | ||
| 628 | || fromType == Short.TYPE | ||
| 629 | || fromType == Character.TYPE | ||
| 630 | || fromType == Integer.TYPE) { | ||
| 631 | if (toType == Long.TYPE) { | ||
| 632 | cb.opc_i2l(); | ||
| 633 | } else if (toType == Float.TYPE) { | ||
| 634 | cb.opc_i2f(); | ||
| 635 | } else if (toType == Double.TYPE) { | ||
| 636 | cb.opc_i2d(); | ||
| 637 | } | ||
| 638 | } else if (fromType == Long.TYPE) { | ||
| 639 | if (toType == Float.TYPE) { | ||
| 640 | cb.opc_l2f(); | ||
| 641 | } else if (toType == Double.TYPE) { | ||
| 642 | cb.opc_l2d(); | ||
| 643 | } | ||
| 644 | } else if (fromType == Float.TYPE) { | ||
| 645 | if (toType == Double.TYPE) { | ||
| 646 | cb.opc_f2d(); | ||
| 647 | } | ||
| 648 | } | ||
| 649 | |||
| 650 | // Otherwise, was identity or no-op conversion. Fall through. | ||
| 651 | } | ||
| 652 | |||
| 653 | protected short unboxingMethodForPrimitiveType(Class primType) { | ||
| 654 | if (primType == Boolean.TYPE) { | ||
| 655 | return booleanUnboxIdx; | ||
| 656 | } else if (primType == Byte.TYPE) { | ||
| 657 | return byteUnboxIdx; | ||
| 658 | } else if (primType == Character.TYPE) { | ||
| 659 | return characterUnboxIdx; | ||
| 660 | } else if (primType == Short.TYPE) { | ||
| 661 | return shortUnboxIdx; | ||
| 662 | } else if (primType == Integer.TYPE) { | ||
| 663 | return integerUnboxIdx; | ||
| 664 | } else if (primType == Long.TYPE) { | ||
| 665 | return longUnboxIdx; | ||
| 666 | } else if (primType == Float.TYPE) { | ||
| 667 | return floatUnboxIdx; | ||
| 668 | } else if (primType == Double.TYPE) { | ||
| 669 | return doubleUnboxIdx; | ||
| 670 | } | ||
| 671 | throw new InternalError("Illegal primitive type " + primType.getName()); | ||
| 672 | } | ||
| 673 | |||
| 674 | protected static final Class[] primitiveTypes = new Class[] { | ||
| 675 | Boolean.TYPE, | ||
| 676 | Byte.TYPE, | ||
| 677 | Character.TYPE, | ||
| 678 | Short.TYPE, | ||
| 679 | Integer.TYPE, | ||
| 680 | Long.TYPE, | ||
| 681 | Float.TYPE, | ||
| 682 | Double.TYPE | ||
| 683 | }; | ||
| 684 | |||
| 685 | /** We don't consider "Void" to be a primitive type */ | ||
| 686 | protected static boolean isPrimitive(Class c) { | ||
| 687 | return (c.isPrimitive() && c != Void.TYPE); | ||
| 688 | } | ||
| 689 | |||
| 690 | protected int typeSizeInStackSlots(Class c) { | ||
| 691 | if (c == Void.TYPE) { | ||
| 692 | return 0; | ||
| 693 | } | ||
| 694 | if (c == Long.TYPE || c == Double.TYPE) { | ||
| 695 | return 2; | ||
| 696 | } | ||
| 697 | return 1; | ||
| 698 | } | ||
| 699 | |||
| 700 | private ClassFileAssembler illegalArgumentCodeBuffer; | ||
| 701 | protected ClassFileAssembler illegalArgumentCodeBuffer() { | ||
| 702 | if (illegalArgumentCodeBuffer == null) { | ||
| 703 | illegalArgumentCodeBuffer = new ClassFileAssembler(); | ||
| 704 | illegalArgumentCodeBuffer.opc_new(illegalArgumentClass); | ||
| 705 | illegalArgumentCodeBuffer.opc_dup(); | ||
| 706 | illegalArgumentCodeBuffer.opc_invokespecial(illegalArgumentCtorIdx, 0, 0); | ||
| 707 | illegalArgumentCodeBuffer.opc_athrow(); | ||
| 708 | } | ||
| 709 | |||
| 710 | return illegalArgumentCodeBuffer; | ||
| 711 | } | ||
| 712 | } | ||