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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 | +} | |