Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
| author | jrose |
|---|---|
| date | Wed, 09 Jun 2010 18:50:45 -0700 |
| parents | c18cbe5936b8 |
| children | 2389669474a6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_classFileParser.cpp.incl" | |
| 27 | |
| 28 // We generally try to create the oops directly when parsing, rather than allocating | |
| 29 // temporary data structures and copying the bytes twice. A temporary area is only | |
| 30 // needed when parsing utf8 entries in the constant pool and when parsing line number | |
| 31 // tables. | |
| 32 | |
| 33 // We add assert in debug mode when class format is not checked. | |
| 34 | |
| 35 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE | |
| 36 #define JAVA_MIN_SUPPORTED_VERSION 45 | |
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37 #define JAVA_MAX_SUPPORTED_VERSION 51 |
| 0 | 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
| 39 | |
| 40 // Used for two backward compatibility reasons: | |
| 41 // - to check for new additions to the class file format in JDK1.5 | |
| 42 // - to check for bug fixes in the format checker in JDK1.5 | |
| 43 #define JAVA_1_5_VERSION 49 | |
| 44 | |
| 45 // Used for backward compatibility reasons: | |
| 46 // - to check for javac bug fixes that happened after 1.5 | |
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47 // - also used as the max version when running in jdk6 |
| 0 | 48 #define JAVA_6_VERSION 50 |
| 49 | |
| 50 | |
| 51 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 52 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 53 // this function (_current can be allocated in a register, with scalar | |
| 54 // replacement of aggregates). The _current pointer is copied back to | |
| 55 // stream() when this function returns. DON'T call another method within | |
| 56 // this method that uses stream(). | |
| 57 ClassFileStream* cfs0 = stream(); | |
| 58 ClassFileStream cfs1 = *cfs0; | |
| 59 ClassFileStream* cfs = &cfs1; | |
| 60 #ifdef ASSERT | |
| 61 u1* old_current = cfs0->current(); | |
| 62 #endif | |
| 63 | |
| 64 // Used for batching symbol allocations. | |
| 65 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 66 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 67 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 68 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 69 int names_count = 0; | |
| 70 | |
| 71 // parsing Index 0 is unused | |
| 72 for (int index = 1; index < length; index++) { | |
| 73 // Each of the following case guarantees one more byte in the stream | |
| 74 // for the following tag or the access_flags following constant pool, | |
| 75 // so we don't need bounds-check for reading tag. | |
| 76 u1 tag = cfs->get_u1_fast(); | |
| 77 switch (tag) { | |
| 78 case JVM_CONSTANT_Class : | |
| 79 { | |
| 80 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 81 u2 name_index = cfs->get_u2_fast(); | |
| 82 cp->klass_index_at_put(index, name_index); | |
| 83 } | |
| 84 break; | |
| 85 case JVM_CONSTANT_Fieldref : | |
| 86 { | |
| 87 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 88 u2 class_index = cfs->get_u2_fast(); | |
| 89 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 90 cp->field_at_put(index, class_index, name_and_type_index); | |
| 91 } | |
| 92 break; | |
| 93 case JVM_CONSTANT_Methodref : | |
| 94 { | |
| 95 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 96 u2 class_index = cfs->get_u2_fast(); | |
| 97 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 98 cp->method_at_put(index, class_index, name_and_type_index); | |
| 99 } | |
| 100 break; | |
| 101 case JVM_CONSTANT_InterfaceMethodref : | |
| 102 { | |
| 103 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 104 u2 class_index = cfs->get_u2_fast(); | |
| 105 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 106 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 107 } | |
| 108 break; | |
| 109 case JVM_CONSTANT_String : | |
| 110 { | |
| 111 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 112 u2 string_index = cfs->get_u2_fast(); | |
| 113 cp->string_index_at_put(index, string_index); | |
| 114 } | |
| 115 break; | |
| 1602 | 116 case JVM_CONSTANT_MethodHandle : |
| 117 case JVM_CONSTANT_MethodType : | |
| 118 if (!EnableMethodHandles || | |
| 119 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
| 120 classfile_parse_error( | |
| 121 (!EnableInvokeDynamic ? | |
| 122 "This JVM does not support constant tag %u in class file %s" : | |
| 123 "Class file version does not support constant tag %u in class file %s"), | |
| 124 tag, CHECK); | |
| 125 } | |
| 126 if (tag == JVM_CONSTANT_MethodHandle) { | |
| 127 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags | |
| 128 u1 ref_kind = cfs->get_u1_fast(); | |
| 129 u2 method_index = cfs->get_u2_fast(); | |
| 130 cp->method_handle_index_at_put(index, ref_kind, method_index); | |
| 131 } else if (tag == JVM_CONSTANT_MethodType) { | |
| 132 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags | |
| 133 u2 signature_index = cfs->get_u2_fast(); | |
| 134 cp->method_type_index_at_put(index, signature_index); | |
| 135 } else { | |
| 136 ShouldNotReachHere(); | |
| 137 } | |
| 138 break; | |
| 0 | 139 case JVM_CONSTANT_Integer : |
| 140 { | |
| 141 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 142 u4 bytes = cfs->get_u4_fast(); | |
| 143 cp->int_at_put(index, (jint) bytes); | |
| 144 } | |
| 145 break; | |
| 146 case JVM_CONSTANT_Float : | |
| 147 { | |
| 148 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 149 u4 bytes = cfs->get_u4_fast(); | |
| 150 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 151 } | |
| 152 break; | |
| 153 case JVM_CONSTANT_Long : | |
| 154 // A mangled type might cause you to overrun allocated memory | |
| 155 guarantee_property(index+1 < length, | |
| 156 "Invalid constant pool entry %u in class file %s", | |
| 157 index, CHECK); | |
| 158 { | |
| 159 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 160 u8 bytes = cfs->get_u8_fast(); | |
| 161 cp->long_at_put(index, bytes); | |
| 162 } | |
| 163 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 164 break; | |
| 165 case JVM_CONSTANT_Double : | |
| 166 // A mangled type might cause you to overrun allocated memory | |
| 167 guarantee_property(index+1 < length, | |
| 168 "Invalid constant pool entry %u in class file %s", | |
| 169 index, CHECK); | |
| 170 { | |
| 171 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 172 u8 bytes = cfs->get_u8_fast(); | |
| 173 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 174 } | |
| 175 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 176 break; | |
| 177 case JVM_CONSTANT_NameAndType : | |
| 178 { | |
| 179 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 180 u2 name_index = cfs->get_u2_fast(); | |
| 181 u2 signature_index = cfs->get_u2_fast(); | |
| 182 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 183 } | |
| 184 break; | |
| 185 case JVM_CONSTANT_Utf8 : | |
| 186 { | |
| 187 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 188 u2 utf8_length = cfs->get_u2_fast(); | |
| 189 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 190 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 191 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 192 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 193 cfs->skip_u1_fast(utf8_length); | |
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194 |
| 0 | 195 // Before storing the symbol, make sure it's legal |
| 196 if (_need_verify) { | |
| 197 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 198 } | |
| 199 | |
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200 if (AnonymousClasses && has_cp_patch_at(index)) { |
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201 Handle patch = clear_cp_patch_at(index); |
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202 guarantee_property(java_lang_String::is_instance(patch()), |
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203 "Illegal utf8 patch at %d in class file %s", |
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204 index, CHECK); |
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205 char* str = java_lang_String::as_utf8_string(patch()); |
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206 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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207 utf8_buffer = (u1*) str; |
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208 utf8_length = (int) strlen(str); |
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209 } |
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210 |
| 0 | 211 unsigned int hash; |
| 212 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
| 213 if (result == NULL) { | |
| 214 names[names_count] = (char*)utf8_buffer; | |
| 215 lengths[names_count] = utf8_length; | |
| 216 indices[names_count] = index; | |
| 217 hashValues[names_count++] = hash; | |
| 218 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
| 219 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 220 names_count = 0; | |
| 221 } | |
| 222 } else { | |
| 223 cp->symbol_at_put(index, result); | |
| 224 } | |
| 225 } | |
| 226 break; | |
| 227 default: | |
| 228 classfile_parse_error( | |
| 229 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 230 break; | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 // Allocate the remaining symbols | |
| 235 if (names_count > 0) { | |
| 236 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 237 } | |
| 238 | |
| 239 // Copy _current pointer of local copy back to stream(). | |
| 240 #ifdef ASSERT | |
| 241 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 242 #endif | |
| 243 cfs0->set_current(cfs1.current()); | |
| 244 } | |
| 245 | |
| 246 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
| 247 | |
| 248 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 249 ClassFileStream* cfs = stream(); | |
| 250 constantPoolHandle nullHandle; | |
| 251 | |
| 252 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 253 u2 length = cfs->get_u2_fast(); | |
| 254 guarantee_property( | |
| 255 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 256 length, CHECK_(nullHandle)); | |
| 257 constantPoolOop constant_pool = | |
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258 oopFactory::new_constantPool(length, |
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259 methodOopDesc::IsSafeConc, |
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260 CHECK_(nullHandle)); |
| 0 | 261 constantPoolHandle cp (THREAD, constant_pool); |
| 262 | |
| 263 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
| 264 | |
| 265 // parsing constant pool entries | |
| 266 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 267 | |
| 268 int index = 1; // declared outside of loops for portability | |
| 269 | |
| 270 // first verification pass - validate cross references and fixup class and string constants | |
| 271 for (index = 1; index < length; index++) { // Index 0 is unused | |
| 272 switch (cp->tag_at(index).value()) { | |
| 273 case JVM_CONSTANT_Class : | |
| 274 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 275 break; | |
| 276 case JVM_CONSTANT_Fieldref : | |
| 277 // fall through | |
| 278 case JVM_CONSTANT_Methodref : | |
| 279 // fall through | |
| 280 case JVM_CONSTANT_InterfaceMethodref : { | |
| 281 if (!_need_verify) break; | |
| 282 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 283 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 284 check_property(valid_cp_range(klass_ref_index, length) && | |
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285 is_klass_reference(cp, klass_ref_index), |
| 0 | 286 "Invalid constant pool index %u in class file %s", |
| 287 klass_ref_index, | |
| 288 CHECK_(nullHandle)); | |
| 289 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 290 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 291 "Invalid constant pool index %u in class file %s", | |
| 292 name_and_type_ref_index, | |
| 293 CHECK_(nullHandle)); | |
| 294 break; | |
| 295 } | |
| 296 case JVM_CONSTANT_String : | |
| 297 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 298 break; | |
| 299 case JVM_CONSTANT_Integer : | |
| 300 break; | |
| 301 case JVM_CONSTANT_Float : | |
| 302 break; | |
| 303 case JVM_CONSTANT_Long : | |
| 304 case JVM_CONSTANT_Double : | |
| 305 index++; | |
| 306 check_property( | |
| 307 (index < length && cp->tag_at(index).is_invalid()), | |
| 308 "Improper constant pool long/double index %u in class file %s", | |
| 309 index, CHECK_(nullHandle)); | |
| 310 break; | |
| 311 case JVM_CONSTANT_NameAndType : { | |
| 312 if (!_need_verify) break; | |
| 313 int name_ref_index = cp->name_ref_index_at(index); | |
| 314 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 315 check_property( | |
| 316 valid_cp_range(name_ref_index, length) && | |
| 317 cp->tag_at(name_ref_index).is_utf8(), | |
| 318 "Invalid constant pool index %u in class file %s", | |
| 319 name_ref_index, CHECK_(nullHandle)); | |
| 320 check_property( | |
| 321 valid_cp_range(signature_ref_index, length) && | |
| 322 cp->tag_at(signature_ref_index).is_utf8(), | |
| 323 "Invalid constant pool index %u in class file %s", | |
| 324 signature_ref_index, CHECK_(nullHandle)); | |
| 325 break; | |
| 326 } | |
| 327 case JVM_CONSTANT_Utf8 : | |
| 328 break; | |
| 329 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 330 case JVM_CONSTANT_UnresolvedClassInError: | |
| 331 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 332 break; | |
| 333 case JVM_CONSTANT_ClassIndex : | |
| 334 { | |
| 335 int class_index = cp->klass_index_at(index); | |
| 336 check_property( | |
| 337 valid_cp_range(class_index, length) && | |
| 338 cp->tag_at(class_index).is_utf8(), | |
| 339 "Invalid constant pool index %u in class file %s", | |
| 340 class_index, CHECK_(nullHandle)); | |
| 341 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 342 } | |
| 343 break; | |
| 344 case JVM_CONSTANT_UnresolvedString : | |
| 345 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 346 break; | |
| 347 case JVM_CONSTANT_StringIndex : | |
| 348 { | |
| 349 int string_index = cp->string_index_at(index); | |
| 350 check_property( | |
| 351 valid_cp_range(string_index, length) && | |
| 352 cp->tag_at(string_index).is_utf8(), | |
| 353 "Invalid constant pool index %u in class file %s", | |
| 354 string_index, CHECK_(nullHandle)); | |
| 355 symbolOop sym = cp->symbol_at(string_index); | |
| 356 cp->unresolved_string_at_put(index, sym); | |
| 357 } | |
| 358 break; | |
| 1602 | 359 case JVM_CONSTANT_MethodHandle : |
| 360 { | |
| 361 int ref_index = cp->method_handle_index_at(index); | |
| 362 check_property( | |
| 363 valid_cp_range(ref_index, length) && | |
| 364 EnableMethodHandles, | |
| 365 "Invalid constant pool index %u in class file %s", | |
| 366 ref_index, CHECK_(nullHandle)); | |
| 367 constantTag tag = cp->tag_at(ref_index); | |
| 368 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 369 switch (ref_kind) { | |
| 370 case JVM_REF_getField: | |
| 371 case JVM_REF_getStatic: | |
| 372 case JVM_REF_putField: | |
| 373 case JVM_REF_putStatic: | |
| 374 check_property( | |
| 375 tag.is_field(), | |
| 376 "Invalid constant pool index %u in class file %s (not a field)", | |
| 377 ref_index, CHECK_(nullHandle)); | |
| 378 break; | |
| 379 case JVM_REF_invokeVirtual: | |
| 380 case JVM_REF_invokeStatic: | |
| 381 case JVM_REF_invokeSpecial: | |
| 382 case JVM_REF_newInvokeSpecial: | |
| 383 check_property( | |
| 384 tag.is_method(), | |
| 385 "Invalid constant pool index %u in class file %s (not a method)", | |
| 386 ref_index, CHECK_(nullHandle)); | |
| 387 break; | |
| 388 case JVM_REF_invokeInterface: | |
| 389 check_property( | |
| 390 tag.is_interface_method(), | |
| 391 "Invalid constant pool index %u in class file %s (not an interface method)", | |
| 392 ref_index, CHECK_(nullHandle)); | |
| 393 break; | |
| 394 default: | |
| 395 classfile_parse_error( | |
| 396 "Bad method handle kind at constant pool index %u in class file %s", | |
| 397 index, CHECK_(nullHandle)); | |
| 398 } | |
| 399 // Keep the ref_index unchanged. It will be indirected at link-time. | |
| 400 } | |
| 401 break; | |
| 402 case JVM_CONSTANT_MethodType : | |
| 403 { | |
| 404 int ref_index = cp->method_type_index_at(index); | |
| 405 check_property( | |
| 406 valid_cp_range(ref_index, length) && | |
| 407 cp->tag_at(ref_index).is_utf8() && | |
| 408 EnableMethodHandles, | |
| 409 "Invalid constant pool index %u in class file %s", | |
| 410 ref_index, CHECK_(nullHandle)); | |
| 411 } | |
| 412 break; | |
| 0 | 413 default: |
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414 fatal(err_msg("bad constant pool tag value %u", |
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415 cp->tag_at(index).value())); |
| 0 | 416 ShouldNotReachHere(); |
| 417 break; | |
| 418 } // end of switch | |
| 419 } // end of for | |
| 420 | |
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421 if (_cp_patches != NULL) { |
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422 // need to treat this_class specially... |
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423 assert(AnonymousClasses, ""); |
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424 int this_class_index; |
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425 { |
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426 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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427 u1* mark = cfs->current(); |
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428 u2 flags = cfs->get_u2_fast(); |
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429 this_class_index = cfs->get_u2_fast(); |
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430 cfs->set_current(mark); // revert to mark |
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431 } |
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432 |
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433 for (index = 1; index < length; index++) { // Index 0 is unused |
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434 if (has_cp_patch_at(index)) { |
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435 guarantee_property(index != this_class_index, |
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436 "Illegal constant pool patch to self at %d in class file %s", |
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437 index, CHECK_(nullHandle)); |
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438 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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439 } |
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440 } |
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441 // Ensure that all the patches have been used. |
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442 for (index = 0; index < _cp_patches->length(); index++) { |
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443 guarantee_property(!has_cp_patch_at(index), |
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444 "Unused constant pool patch at %d in class file %s", |
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445 index, CHECK_(nullHandle)); |
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446 } |
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447 } |
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448 |
| 0 | 449 if (!_need_verify) { |
| 450 return cp; | |
| 451 } | |
| 452 | |
| 453 // second verification pass - checks the strings are of the right format. | |
|
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454 // but not yet to the other entries |
| 0 | 455 for (index = 1; index < length; index++) { |
| 456 jbyte tag = cp->tag_at(index).value(); | |
| 457 switch (tag) { | |
| 458 case JVM_CONSTANT_UnresolvedClass: { | |
| 459 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
|
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460 // check the name, even if _cp_patches will overwrite it |
| 0 | 461 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
| 462 break; | |
| 463 } | |
| 464 case JVM_CONSTANT_Fieldref: | |
| 465 case JVM_CONSTANT_Methodref: | |
| 466 case JVM_CONSTANT_InterfaceMethodref: { | |
| 467 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 468 // already verified to be utf8 | |
| 469 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 470 // already verified to be utf8 | |
| 471 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
| 472 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 473 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
| 474 if (tag == JVM_CONSTANT_Fieldref) { | |
| 475 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 476 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
| 477 } else { | |
| 478 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 479 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 480 if (tag == JVM_CONSTANT_Methodref) { | |
| 481 // 4509014: If a class method name begins with '<', it must be "<init>". | |
| 482 assert(!name.is_null(), "method name in constant pool is null"); | |
| 483 unsigned int name_len = name->utf8_length(); | |
| 484 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 485 if (name->byte_at(0) == '<') { | |
| 486 if (name() != vmSymbols::object_initializer_name()) { | |
| 487 classfile_parse_error( | |
| 488 "Bad method name at constant pool index %u in class file %s", | |
| 489 name_ref_index, CHECK_(nullHandle)); | |
| 490 } | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 break; | |
| 495 } | |
| 1602 | 496 case JVM_CONSTANT_MethodHandle: { |
| 497 int ref_index = cp->method_handle_index_at(index); | |
| 498 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 499 switch (ref_kind) { | |
| 500 case JVM_REF_invokeVirtual: | |
| 501 case JVM_REF_invokeStatic: | |
| 502 case JVM_REF_invokeSpecial: | |
| 503 case JVM_REF_newInvokeSpecial: | |
| 504 { | |
| 505 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); | |
| 506 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 507 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 508 if (ref_kind == JVM_REF_newInvokeSpecial) { | |
| 509 if (name() != vmSymbols::object_initializer_name()) { | |
| 510 classfile_parse_error( | |
| 511 "Bad constructor name at constant pool index %u in class file %s", | |
| 512 name_ref_index, CHECK_(nullHandle)); | |
| 513 } | |
| 514 } else { | |
| 515 if (name() == vmSymbols::object_initializer_name()) { | |
| 516 classfile_parse_error( | |
| 517 "Bad method name at constant pool index %u in class file %s", | |
| 518 name_ref_index, CHECK_(nullHandle)); | |
| 519 } | |
| 520 } | |
| 521 } | |
| 522 break; | |
| 523 // Other ref_kinds are already fully checked in previous pass. | |
| 524 } | |
| 525 break; | |
| 526 } | |
| 527 case JVM_CONSTANT_MethodType: { | |
| 528 symbolHandle no_name = vmSymbolHandles::type_name(); // place holder | |
| 529 symbolHandle signature(THREAD, cp->method_type_signature_at(index)); | |
| 530 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); | |
| 531 break; | |
| 532 } | |
| 0 | 533 } // end of switch |
| 534 } // end of for | |
| 535 | |
| 536 return cp; | |
| 537 } | |
| 538 | |
| 539 | |
|
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540 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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541 assert(AnonymousClasses, ""); |
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542 BasicType patch_type = T_VOID; |
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543 switch (cp->tag_at(index).value()) { |
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544 |
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545 case JVM_CONSTANT_UnresolvedClass : |
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546 // Patching a class means pre-resolving it. |
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547 // The name in the constant pool is ignored. |
| 1602 | 548 if (java_lang_Class::is_instance(patch())) { |
|
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549 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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550 "Illegal class patch at %d in class file %s", |
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551 index, CHECK); |
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552 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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553 } else { |
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554 guarantee_property(java_lang_String::is_instance(patch()), |
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555 "Illegal class patch at %d in class file %s", |
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556 index, CHECK); |
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557 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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558 cp->unresolved_klass_at_put(index, name()); |
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559 } |
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560 break; |
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561 |
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562 case JVM_CONSTANT_UnresolvedString : |
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563 // Patching a string means pre-resolving it. |
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564 // The spelling in the constant pool is ignored. |
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565 // The constant reference may be any object whatever. |
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566 // If it is not a real interned string, the constant is referred |
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567 // to as a "pseudo-string", and must be presented to the CP |
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568 // explicitly, because it may require scavenging. |
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569 cp->pseudo_string_at_put(index, patch()); |
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570 break; |
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571 |
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572 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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573 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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574 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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575 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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576 patch_prim: |
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577 { |
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578 jvalue value; |
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579 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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580 guarantee_property(value_type == patch_type, |
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581 "Illegal primitive patch at %d in class file %s", |
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582 index, CHECK); |
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583 switch (value_type) { |
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584 case T_INT: cp->int_at_put(index, value.i); break; |
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585 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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586 case T_LONG: cp->long_at_put(index, value.j); break; |
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587 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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588 default: assert(false, ""); |
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589 } |
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590 } |
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591 break; |
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592 |
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593 default: |
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594 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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595 guarantee_property(!has_cp_patch_at(index), |
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596 "Illegal unexpected patch at %d in class file %s", |
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597 index, CHECK); |
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598 return; |
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599 } |
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600 |
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601 // On fall-through, mark the patch as used. |
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602 clear_cp_patch_at(index); |
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603 } |
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604 |
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605 |
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606 |
| 0 | 607 class NameSigHash: public ResourceObj { |
| 608 public: | |
| 609 symbolOop _name; // name | |
| 610 symbolOop _sig; // signature | |
| 611 NameSigHash* _next; // Next entry in hash table | |
| 612 }; | |
| 613 | |
| 614 | |
| 615 #define HASH_ROW_SIZE 256 | |
| 616 | |
| 617 unsigned int hash(symbolOop name, symbolOop sig) { | |
| 618 unsigned int raw_hash = 0; | |
| 619 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 620 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 621 | |
| 622 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 623 } | |
| 624 | |
| 625 | |
| 626 void initialize_hashtable(NameSigHash** table) { | |
| 627 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 628 } | |
| 629 | |
| 630 // Return false if the name/sig combination is found in table. | |
| 631 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 632 // The old format checker uses heap sort to find duplicates. | |
| 633 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
| 634 // of table since we don't expect symbolOop's to move. | |
| 635 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
| 636 assert(name != NULL, "name in constant pool is NULL"); | |
| 637 | |
| 638 // First lookup for duplicates | |
| 639 int index = hash(name, sig); | |
| 640 NameSigHash* entry = table[index]; | |
| 641 while (entry != NULL) { | |
| 642 if (entry->_name == name && entry->_sig == sig) { | |
| 643 return false; | |
| 644 } | |
| 645 entry = entry->_next; | |
| 646 } | |
| 647 | |
| 648 // No duplicate is found, allocate a new entry and fill it. | |
| 649 entry = new NameSigHash(); | |
| 650 entry->_name = name; | |
| 651 entry->_sig = sig; | |
| 652 | |
| 653 // Insert into hash table | |
| 654 entry->_next = table[index]; | |
| 655 table[index] = entry; | |
| 656 | |
| 657 return true; | |
| 658 } | |
| 659 | |
| 660 | |
| 661 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 662 int length, | |
| 663 Handle class_loader, | |
| 664 Handle protection_domain, | |
| 665 symbolHandle class_name, | |
| 666 TRAPS) { | |
| 667 ClassFileStream* cfs = stream(); | |
| 668 assert(length > 0, "only called for length>0"); | |
| 669 objArrayHandle nullHandle; | |
| 670 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 671 objArrayHandle interfaces (THREAD, interface_oop); | |
| 672 | |
| 673 int index; | |
| 674 for (index = 0; index < length; index++) { | |
| 675 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
|
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676 KlassHandle interf; |
| 0 | 677 check_property( |
| 678 valid_cp_range(interface_index, cp->length()) && | |
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679 is_klass_reference(cp, interface_index), |
| 0 | 680 "Interface name has bad constant pool index %u in class file %s", |
| 681 interface_index, CHECK_(nullHandle)); | |
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682 if (cp->tag_at(interface_index).is_klass()) { |
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683 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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684 } else { |
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685 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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686 |
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687 // Don't need to check legal name because it's checked when parsing constant pool. |
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688 // But need to make sure it's not an array type. |
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689 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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690 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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691 |
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692 // Call resolve_super so classcircularity is checked |
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693 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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694 unresolved_klass, class_loader, protection_domain, |
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695 false, CHECK_(nullHandle)); |
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696 interf = KlassHandle(THREAD, k); |
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697 |
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698 if (LinkWellKnownClasses) // my super type is well known to me |
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699 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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700 } |
| 0 | 701 |
| 702 if (!Klass::cast(interf())->is_interface()) { | |
| 703 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 704 } | |
| 705 interfaces->obj_at_put(index, interf()); | |
| 706 } | |
| 707 | |
| 708 if (!_need_verify || length <= 1) { | |
| 709 return interfaces; | |
| 710 } | |
| 711 | |
| 712 // Check if there's any duplicates in interfaces | |
| 713 ResourceMark rm(THREAD); | |
| 714 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 715 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 716 initialize_hashtable(interface_names); | |
| 717 bool dup = false; | |
| 718 { | |
| 719 debug_only(No_Safepoint_Verifier nsv;) | |
| 720 for (index = 0; index < length; index++) { | |
| 721 klassOop k = (klassOop)interfaces->obj_at(index); | |
| 722 symbolOop name = instanceKlass::cast(k)->name(); | |
| 723 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
| 724 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 725 dup = true; | |
| 726 break; | |
| 727 } | |
| 728 } | |
| 729 } | |
| 730 if (dup) { | |
| 731 classfile_parse_error("Duplicate interface name in class file %s", | |
| 732 CHECK_(nullHandle)); | |
| 733 } | |
| 734 | |
| 735 return interfaces; | |
| 736 } | |
| 737 | |
| 738 | |
| 739 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 740 // Make sure the constant pool entry is of a type appropriate to this field | |
| 741 guarantee_property( | |
| 742 (constantvalue_index > 0 && | |
| 743 constantvalue_index < cp->length()), | |
| 744 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 745 constantvalue_index, CHECK); | |
| 746 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 747 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 748 case T_LONG: | |
| 749 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 750 break; | |
| 751 case T_FLOAT: | |
| 752 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 753 break; | |
| 754 case T_DOUBLE: | |
| 755 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 756 break; | |
| 757 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 758 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 759 break; | |
| 760 case T_OBJECT: | |
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761 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") |
| 0 | 762 && (value_type.is_string() || value_type.is_unresolved_string())), |
| 763 "Bad string initial value in class file %s", CHECK); | |
| 764 break; | |
| 765 default: | |
| 766 classfile_parse_error( | |
| 767 "Unable to set initial value %u in class file %s", | |
| 768 constantvalue_index, CHECK); | |
| 769 } | |
| 770 } | |
| 771 | |
| 772 | |
| 773 // Parse attributes for a field. | |
| 774 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 775 u2 attributes_count, | |
| 776 bool is_static, u2 signature_index, | |
| 777 u2* constantvalue_index_addr, | |
| 778 bool* is_synthetic_addr, | |
| 779 u2* generic_signature_index_addr, | |
| 780 typeArrayHandle* field_annotations, | |
| 781 TRAPS) { | |
| 782 ClassFileStream* cfs = stream(); | |
| 783 assert(attributes_count > 0, "length should be greater than 0"); | |
| 784 u2 constantvalue_index = 0; | |
| 785 u2 generic_signature_index = 0; | |
| 786 bool is_synthetic = false; | |
| 787 u1* runtime_visible_annotations = NULL; | |
| 788 int runtime_visible_annotations_length = 0; | |
| 789 u1* runtime_invisible_annotations = NULL; | |
| 790 int runtime_invisible_annotations_length = 0; | |
| 791 while (attributes_count--) { | |
| 792 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 793 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 794 u4 attribute_length = cfs->get_u4_fast(); | |
| 795 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 796 cp->tag_at(attribute_name_index).is_utf8(), | |
| 797 "Invalid field attribute index %u in class file %s", | |
| 798 attribute_name_index, | |
| 799 CHECK); | |
| 800 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
| 801 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
| 802 // ignore if non-static | |
| 803 if (constantvalue_index != 0) { | |
| 804 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 805 } | |
| 806 check_property( | |
| 807 attribute_length == 2, | |
| 808 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 809 attribute_length, CHECK); | |
| 810 constantvalue_index = cfs->get_u2(CHECK); | |
| 811 if (_need_verify) { | |
| 812 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 813 } | |
| 814 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 815 if (attribute_length != 0) { | |
| 816 classfile_parse_error( | |
| 817 "Invalid Synthetic field attribute length %u in class file %s", | |
| 818 attribute_length, CHECK); | |
| 819 } | |
| 820 is_synthetic = true; | |
| 821 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 822 if (attribute_length != 0) { | |
| 823 classfile_parse_error( | |
| 824 "Invalid Deprecated field attribute length %u in class file %s", | |
| 825 attribute_length, CHECK); | |
| 826 } | |
| 827 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 828 if (attribute_name == vmSymbols::tag_signature()) { | |
| 829 if (attribute_length != 2) { | |
| 830 classfile_parse_error( | |
| 831 "Wrong size %u for field's Signature attribute in class file %s", | |
| 832 attribute_length, CHECK); | |
| 833 } | |
| 834 generic_signature_index = cfs->get_u2(CHECK); | |
| 835 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 836 runtime_visible_annotations_length = attribute_length; | |
| 837 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 838 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 839 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 840 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 841 runtime_invisible_annotations_length = attribute_length; | |
| 842 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 843 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 844 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 845 } else { | |
| 846 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 847 } | |
| 848 } else { | |
| 849 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 850 } | |
| 851 } | |
| 852 | |
| 853 *constantvalue_index_addr = constantvalue_index; | |
| 854 *is_synthetic_addr = is_synthetic; | |
| 855 *generic_signature_index_addr = generic_signature_index; | |
| 856 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 857 runtime_visible_annotations_length, | |
| 858 runtime_invisible_annotations, | |
| 859 runtime_invisible_annotations_length, | |
| 860 CHECK); | |
| 861 return; | |
| 862 } | |
| 863 | |
| 864 | |
| 865 // Field allocation types. Used for computing field offsets. | |
| 866 | |
| 867 enum FieldAllocationType { | |
| 868 STATIC_OOP, // Oops | |
| 869 STATIC_BYTE, // Boolean, Byte, char | |
| 870 STATIC_SHORT, // shorts | |
| 871 STATIC_WORD, // ints | |
| 872 STATIC_DOUBLE, // long or double | |
| 873 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 874 NONSTATIC_OOP, | |
| 875 NONSTATIC_BYTE, | |
| 876 NONSTATIC_SHORT, | |
| 877 NONSTATIC_WORD, | |
| 878 NONSTATIC_DOUBLE, | |
| 879 NONSTATIC_ALIGNED_DOUBLE | |
| 880 }; | |
| 881 | |
| 882 | |
| 883 struct FieldAllocationCount { | |
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884 unsigned int static_oop_count; |
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885 unsigned int static_byte_count; |
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886 unsigned int static_short_count; |
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887 unsigned int static_word_count; |
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888 unsigned int static_double_count; |
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889 unsigned int nonstatic_oop_count; |
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890 unsigned int nonstatic_byte_count; |
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891 unsigned int nonstatic_short_count; |
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892 unsigned int nonstatic_word_count; |
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893 unsigned int nonstatic_double_count; |
| 0 | 894 }; |
| 895 | |
| 896 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 897 struct FieldAllocationCount *fac, | |
| 898 objArrayHandle* fields_annotations, TRAPS) { | |
| 899 ClassFileStream* cfs = stream(); | |
| 900 typeArrayHandle nullHandle; | |
| 901 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 902 u2 length = cfs->get_u2_fast(); | |
| 903 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 904 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 905 typeArrayHandle fields(THREAD, new_fields); | |
| 906 | |
| 907 int index = 0; | |
| 908 typeArrayHandle field_annotations; | |
| 909 for (int n = 0; n < length; n++) { | |
| 910 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 911 | |
| 912 AccessFlags access_flags; | |
| 913 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 914 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 915 access_flags.set_flags(flags); | |
| 916 | |
| 917 u2 name_index = cfs->get_u2_fast(); | |
| 918 int cp_size = cp->length(); | |
| 919 check_property( | |
| 920 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 921 "Invalid constant pool index %u for field name in class file %s", | |
| 922 name_index, CHECK_(nullHandle)); | |
| 923 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 924 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 925 | |
| 926 u2 signature_index = cfs->get_u2_fast(); | |
| 927 check_property( | |
| 928 valid_cp_range(signature_index, cp_size) && | |
| 929 cp->tag_at(signature_index).is_utf8(), | |
| 930 "Invalid constant pool index %u for field signature in class file %s", | |
| 931 signature_index, CHECK_(nullHandle)); | |
| 932 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
| 933 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
| 934 | |
| 935 u2 constantvalue_index = 0; | |
| 936 bool is_synthetic = false; | |
| 937 u2 generic_signature_index = 0; | |
| 938 bool is_static = access_flags.is_static(); | |
| 939 | |
| 940 u2 attributes_count = cfs->get_u2_fast(); | |
| 941 if (attributes_count > 0) { | |
| 942 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 943 &constantvalue_index, &is_synthetic, | |
| 944 &generic_signature_index, &field_annotations, | |
| 945 CHECK_(nullHandle)); | |
| 946 if (field_annotations.not_null()) { | |
| 947 if (fields_annotations->is_null()) { | |
| 948 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 949 *fields_annotations = objArrayHandle(THREAD, md); | |
| 950 } | |
| 951 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 952 } | |
| 953 if (is_synthetic) { | |
| 954 access_flags.set_is_synthetic(); | |
| 955 } | |
| 956 } | |
| 957 | |
| 958 fields->short_at_put(index++, access_flags.as_short()); | |
| 959 fields->short_at_put(index++, name_index); | |
| 960 fields->short_at_put(index++, signature_index); | |
| 961 fields->short_at_put(index++, constantvalue_index); | |
| 962 | |
| 963 // Remember how many oops we encountered and compute allocation type | |
| 964 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 965 FieldAllocationType atype; | |
| 966 if ( is_static ) { | |
| 967 switch ( type ) { | |
| 968 case T_BOOLEAN: | |
| 969 case T_BYTE: | |
| 970 fac->static_byte_count++; | |
| 971 atype = STATIC_BYTE; | |
| 972 break; | |
| 973 case T_LONG: | |
| 974 case T_DOUBLE: | |
| 975 if (Universe::field_type_should_be_aligned(type)) { | |
| 976 atype = STATIC_ALIGNED_DOUBLE; | |
| 977 } else { | |
| 978 atype = STATIC_DOUBLE; | |
| 979 } | |
| 980 fac->static_double_count++; | |
| 981 break; | |
| 982 case T_CHAR: | |
| 983 case T_SHORT: | |
| 984 fac->static_short_count++; | |
| 985 atype = STATIC_SHORT; | |
| 986 break; | |
| 987 case T_FLOAT: | |
| 988 case T_INT: | |
| 989 fac->static_word_count++; | |
| 990 atype = STATIC_WORD; | |
| 991 break; | |
| 992 case T_ARRAY: | |
| 993 case T_OBJECT: | |
| 994 fac->static_oop_count++; | |
| 995 atype = STATIC_OOP; | |
| 996 break; | |
| 997 case T_ADDRESS: | |
| 998 case T_VOID: | |
| 999 default: | |
| 1000 assert(0, "bad field type"); | |
| 1001 } | |
| 1002 } else { | |
| 1003 switch ( type ) { | |
| 1004 case T_BOOLEAN: | |
| 1005 case T_BYTE: | |
| 1006 fac->nonstatic_byte_count++; | |
| 1007 atype = NONSTATIC_BYTE; | |
| 1008 break; | |
| 1009 case T_LONG: | |
| 1010 case T_DOUBLE: | |
| 1011 if (Universe::field_type_should_be_aligned(type)) { | |
| 1012 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 1013 } else { | |
| 1014 atype = NONSTATIC_DOUBLE; | |
| 1015 } | |
| 1016 fac->nonstatic_double_count++; | |
| 1017 break; | |
| 1018 case T_CHAR: | |
| 1019 case T_SHORT: | |
| 1020 fac->nonstatic_short_count++; | |
| 1021 atype = NONSTATIC_SHORT; | |
| 1022 break; | |
| 1023 case T_FLOAT: | |
| 1024 case T_INT: | |
| 1025 fac->nonstatic_word_count++; | |
| 1026 atype = NONSTATIC_WORD; | |
| 1027 break; | |
| 1028 case T_ARRAY: | |
| 1029 case T_OBJECT: | |
| 1030 fac->nonstatic_oop_count++; | |
| 1031 atype = NONSTATIC_OOP; | |
| 1032 break; | |
| 1033 case T_ADDRESS: | |
| 1034 case T_VOID: | |
| 1035 default: | |
| 1036 assert(0, "bad field type"); | |
| 1037 } | |
| 1038 } | |
| 1039 | |
| 1040 // The correct offset is computed later (all oop fields will be located together) | |
| 1041 // We temporarily store the allocation type in the offset field | |
| 1042 fields->short_at_put(index++, atype); | |
| 1043 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 1044 fields->short_at_put(index++, generic_signature_index); | |
| 1045 } | |
| 1046 | |
| 1047 if (_need_verify && length > 1) { | |
| 1048 // Check duplicated fields | |
| 1049 ResourceMark rm(THREAD); | |
| 1050 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1051 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1052 initialize_hashtable(names_and_sigs); | |
| 1053 bool dup = false; | |
| 1054 { | |
| 1055 debug_only(No_Safepoint_Verifier nsv;) | |
| 1056 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 1057 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
| 1058 symbolOop name = cp->symbol_at(name_index); | |
| 1059 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
| 1060 symbolOop sig = cp->symbol_at(sig_index); | |
| 1061 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 1062 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 1063 dup = true; | |
| 1064 break; | |
| 1065 } | |
| 1066 } | |
| 1067 } | |
| 1068 if (dup) { | |
| 1069 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 1070 CHECK_(nullHandle)); | |
| 1071 } | |
| 1072 } | |
| 1073 | |
| 1074 return fields; | |
| 1075 } | |
| 1076 | |
| 1077 | |
| 1078 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 1079 while (length-- > 0) { | |
| 1080 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 | |
| 1085 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 1086 u4 exception_table_length, | |
| 1087 constantPoolHandle cp, | |
| 1088 TRAPS) { | |
| 1089 ClassFileStream* cfs = stream(); | |
| 1090 typeArrayHandle nullHandle; | |
| 1091 | |
| 1092 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 1093 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 1094 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 1095 | |
| 1096 int index = 0; | |
| 1097 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 1098 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 1099 u2 start_pc = cfs->get_u2_fast(); | |
| 1100 u2 end_pc = cfs->get_u2_fast(); | |
| 1101 u2 handler_pc = cfs->get_u2_fast(); | |
| 1102 u2 catch_type_index = cfs->get_u2_fast(); | |
| 1103 // Will check legal target after parsing code array in verifier. | |
| 1104 if (_need_verify) { | |
| 1105 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 1106 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 1107 guarantee_property(handler_pc < code_length, | |
| 1108 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 1109 if (catch_type_index != 0) { | |
| 1110 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
|
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1111 is_klass_reference(cp, catch_type_index), |
| 0 | 1112 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
| 1113 } | |
| 1114 } | |
| 1115 exception_handlers->int_at_put(index++, start_pc); | |
| 1116 exception_handlers->int_at_put(index++, end_pc); | |
| 1117 exception_handlers->int_at_put(index++, handler_pc); | |
| 1118 exception_handlers->int_at_put(index++, catch_type_index); | |
| 1119 } | |
| 1120 return exception_handlers; | |
| 1121 } | |
| 1122 | |
| 1123 void ClassFileParser::parse_linenumber_table( | |
| 1124 u4 code_attribute_length, u4 code_length, | |
| 1125 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 1126 ClassFileStream* cfs = stream(); | |
| 1127 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 1128 | |
| 1129 // Each entry is a u2 start_pc, and a u2 line_number | |
| 1130 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 1131 | |
| 1132 // Verify line number attribute and table length | |
| 1133 check_property( | |
| 1134 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 1135 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 1136 | |
| 1137 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 1138 | |
| 1139 if ((*write_stream) == NULL) { | |
| 1140 if (length_in_bytes > fixed_buffer_size) { | |
| 1141 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 1142 } else { | |
| 1143 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 1144 linenumbertable_buffer, fixed_buffer_size); | |
| 1145 } | |
| 1146 } | |
| 1147 | |
| 1148 while (num_entries-- > 0) { | |
| 1149 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 1150 u2 line = cfs->get_u2_fast(); // line_number | |
| 1151 guarantee_property(bci < code_length, | |
| 1152 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 1153 (*write_stream)->write_pair(bci, line); | |
| 1154 } | |
| 1155 } | |
| 1156 | |
| 1157 | |
| 1158 // Class file LocalVariableTable elements. | |
| 1159 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 1160 public: | |
| 1161 u2 start_bci; | |
| 1162 u2 length; | |
| 1163 u2 name_cp_index; | |
| 1164 u2 descriptor_cp_index; | |
| 1165 u2 slot; | |
| 1166 }; | |
| 1167 | |
| 1168 | |
| 1169 class LVT_Hash: public CHeapObj { | |
| 1170 public: | |
| 1171 LocalVariableTableElement *_elem; // element | |
| 1172 LVT_Hash* _next; // Next entry in hash table | |
| 1173 }; | |
| 1174 | |
| 1175 unsigned int hash(LocalVariableTableElement *elem) { | |
| 1176 unsigned int raw_hash = elem->start_bci; | |
| 1177 | |
| 1178 raw_hash = elem->length + raw_hash * 37; | |
| 1179 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 1180 raw_hash = elem->slot + raw_hash * 37; | |
| 1181 | |
| 1182 return raw_hash % HASH_ROW_SIZE; | |
| 1183 } | |
| 1184 | |
| 1185 void initialize_hashtable(LVT_Hash** table) { | |
| 1186 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1187 table[i] = NULL; | |
| 1188 } | |
| 1189 } | |
| 1190 | |
| 1191 void clear_hashtable(LVT_Hash** table) { | |
| 1192 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1193 LVT_Hash* current = table[i]; | |
| 1194 LVT_Hash* next; | |
| 1195 while (current != NULL) { | |
| 1196 next = current->_next; | |
| 1197 current->_next = NULL; | |
| 1198 delete(current); | |
| 1199 current = next; | |
| 1200 } | |
| 1201 table[i] = NULL; | |
| 1202 } | |
| 1203 } | |
| 1204 | |
| 1205 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 1206 LVT_Hash* entry = table[index]; | |
| 1207 | |
| 1208 /* | |
| 1209 * 3-tuple start_bci/length/slot has to be unique key, | |
| 1210 * so the following comparison seems to be redundant: | |
| 1211 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1212 */ | |
| 1213 while (entry != NULL) { | |
| 1214 if (elem->start_bci == entry->_elem->start_bci | |
| 1215 && elem->length == entry->_elem->length | |
| 1216 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1217 && elem->slot == entry->_elem->slot | |
| 1218 ) { | |
| 1219 return entry; | |
| 1220 } | |
| 1221 entry = entry->_next; | |
| 1222 } | |
| 1223 return NULL; | |
| 1224 } | |
| 1225 | |
| 1226 // Return false if the local variable is found in table. | |
| 1227 // Return true if no duplicate is found. | |
| 1228 // And local variable is added as a new entry in table. | |
| 1229 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1230 // First lookup for duplicates | |
| 1231 int index = hash(elem); | |
| 1232 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1233 | |
| 1234 if (entry != NULL) { | |
| 1235 return false; | |
| 1236 } | |
| 1237 // No duplicate is found, allocate a new entry and fill it. | |
| 1238 if ((entry = new LVT_Hash()) == NULL) { | |
| 1239 return false; | |
| 1240 } | |
| 1241 entry->_elem = elem; | |
| 1242 | |
| 1243 // Insert into hash table | |
| 1244 entry->_next = table[index]; | |
| 1245 table[index] = entry; | |
| 1246 | |
| 1247 return true; | |
| 1248 } | |
| 1249 | |
| 1250 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1251 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1252 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1253 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1254 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1255 lvt->signature_cp_index = 0; | |
| 1256 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1257 } | |
| 1258 | |
| 1259 // Function is used to parse both attributes: | |
| 1260 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1261 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1262 u2 max_locals, | |
| 1263 u4 code_attribute_length, | |
| 1264 constantPoolHandle cp, | |
| 1265 u2* localvariable_table_length, | |
| 1266 bool isLVTT, | |
| 1267 TRAPS) { | |
| 1268 ClassFileStream* cfs = stream(); | |
| 1269 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1270 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1271 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1272 // Verify local variable table attribute has right length | |
| 1273 if (_need_verify) { | |
| 1274 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1275 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1276 } | |
| 1277 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1278 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1279 if (!_need_verify) { | |
| 1280 cfs->skip_u2_fast(size); | |
| 1281 } else { | |
| 1282 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1283 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1284 u2 start_pc = cfs->get_u2_fast(); | |
| 1285 u2 length = cfs->get_u2_fast(); | |
| 1286 u2 name_index = cfs->get_u2_fast(); | |
| 1287 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1288 u2 index = cfs->get_u2_fast(); | |
| 1289 // Assign to a u4 to avoid overflow | |
| 1290 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1291 | |
| 1292 if (start_pc >= code_length) { | |
| 1293 classfile_parse_error( | |
| 1294 "Invalid start_pc %u in %s in class file %s", | |
| 1295 start_pc, tbl_name, CHECK_NULL); | |
| 1296 } | |
| 1297 if (end_pc > code_length) { | |
| 1298 classfile_parse_error( | |
| 1299 "Invalid length %u in %s in class file %s", | |
| 1300 length, tbl_name, CHECK_NULL); | |
| 1301 } | |
| 1302 int cp_size = cp->length(); | |
| 1303 guarantee_property( | |
| 1304 valid_cp_range(name_index, cp_size) && | |
| 1305 cp->tag_at(name_index).is_utf8(), | |
| 1306 "Name index %u in %s has bad constant type in class file %s", | |
| 1307 name_index, tbl_name, CHECK_NULL); | |
| 1308 guarantee_property( | |
| 1309 valid_cp_range(descriptor_index, cp_size) && | |
| 1310 cp->tag_at(descriptor_index).is_utf8(), | |
| 1311 "Signature index %u in %s has bad constant type in class file %s", | |
| 1312 descriptor_index, tbl_name, CHECK_NULL); | |
| 1313 | |
| 1314 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1315 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
| 1316 verify_legal_field_name(name, CHECK_NULL); | |
| 1317 u2 extra_slot = 0; | |
| 1318 if (!isLVTT) { | |
| 1319 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1320 | |
| 1321 // 4894874: check special cases for double and long local variables | |
| 1322 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
| 1323 sig() == vmSymbols::type_signature(T_LONG)) { | |
| 1324 extra_slot = 1; | |
| 1325 } | |
| 1326 } | |
| 1327 guarantee_property((index + extra_slot) < max_locals, | |
| 1328 "Invalid index %u in %s in class file %s", | |
| 1329 index, tbl_name, CHECK_NULL); | |
| 1330 } | |
| 1331 } | |
| 1332 return localvariable_table_start; | |
| 1333 } | |
| 1334 | |
| 1335 | |
| 1336 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1337 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1338 ClassFileStream* cfs = stream(); | |
| 1339 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1340 u4 i1 = *u1_index; | |
| 1341 u4 i2 = *u2_index + 1; | |
| 1342 for(int i = 0; i < array_length; i++) { | |
| 1343 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1344 index++; | |
| 1345 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1346 index++; | |
| 1347 } else if (tag == ITEM_Object) { | |
| 1348 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1349 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1350 is_klass_reference(cp, class_index), |
| 0 | 1351 "Bad class index %u in StackMap in class file %s", |
| 1352 class_index, CHECK); | |
| 1353 } else if (tag == ITEM_Uninitialized) { | |
| 1354 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1355 guarantee_property( | |
| 1356 offset < code_length, | |
| 1357 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1358 offset, CHECK); | |
| 1359 } else { | |
| 1360 guarantee_property( | |
| 1361 tag <= (u1)ITEM_Uninitialized, | |
| 1362 "Unknown variable type %u in StackMap in class file %s", | |
| 1363 tag, CHECK); | |
| 1364 } | |
| 1365 } | |
| 1366 u2_array[*u2_index] = index; | |
| 1367 *u1_index = i1; | |
| 1368 *u2_index = i2; | |
| 1369 } | |
| 1370 | |
| 1371 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1372 u4 code_attribute_length, TRAPS) { | |
| 1373 if (code_attribute_length == 0) | |
| 1374 return NULL; | |
| 1375 | |
| 1376 ClassFileStream* cfs = stream(); | |
| 1377 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1378 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1379 | |
| 1380 // check code_attribute_length first | |
| 1381 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1382 | |
| 1383 if (!_need_verify && !DumpSharedSpaces) { | |
| 1384 return NULL; | |
| 1385 } | |
| 1386 | |
| 1387 typeArrayOop stackmap_data = | |
| 1388 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1389 | |
| 1390 stackmap_data->set_length(code_attribute_length); | |
| 1391 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1392 (void*)stackmap_table_start, code_attribute_length); | |
| 1393 return stackmap_data; | |
| 1394 } | |
| 1395 | |
| 1396 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1397 u4 method_attribute_length, | |
| 1398 constantPoolHandle cp, TRAPS) { | |
| 1399 ClassFileStream* cfs = stream(); | |
| 1400 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1401 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1402 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1403 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1404 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1405 if (!_need_verify) { | |
| 1406 cfs->skip_u2_fast(size); | |
| 1407 } else { | |
| 1408 // Verify each value in the checked exception table | |
| 1409 u2 checked_exception; | |
| 1410 u2 len = *checked_exceptions_length; | |
| 1411 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1412 for (int i = 0; i < len; i++) { | |
| 1413 checked_exception = cfs->get_u2_fast(); | |
| 1414 check_property( | |
| 1415 valid_cp_range(checked_exception, cp->length()) && | |
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1416 is_klass_reference(cp, checked_exception), |
| 0 | 1417 "Exception name has bad type at constant pool %u in class file %s", |
| 1418 checked_exception, CHECK_NULL); | |
| 1419 } | |
| 1420 } | |
| 1421 // check exceptions attribute length | |
| 1422 if (_need_verify) { | |
| 1423 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1424 sizeof(u2) * size), | |
| 1425 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1426 } | |
| 1427 return checked_exceptions_start; | |
| 1428 } | |
| 1429 | |
| 1430 | |
| 1431 #define MAX_ARGS_SIZE 255 | |
| 1432 #define MAX_CODE_SIZE 65535 | |
| 1433 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1434 | |
| 1435 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1436 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1437 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1438 // entire method attribute is parsed. | |
| 1439 // | |
| 1440 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1441 // from the method back up to the containing klass. These flag values | |
| 1442 // are added to klass's access_flags. | |
| 1443 | |
| 1444 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1445 AccessFlags *promoted_flags, | |
| 1446 typeArrayHandle* method_annotations, | |
| 1447 typeArrayHandle* method_parameter_annotations, | |
| 1448 typeArrayHandle* method_default_annotations, | |
| 1449 TRAPS) { | |
| 1450 ClassFileStream* cfs = stream(); | |
| 1451 methodHandle nullHandle; | |
| 1452 ResourceMark rm(THREAD); | |
| 1453 // Parse fixed parts | |
| 1454 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1455 | |
| 1456 int flags = cfs->get_u2_fast(); | |
| 1457 u2 name_index = cfs->get_u2_fast(); | |
| 1458 int cp_size = cp->length(); | |
| 1459 check_property( | |
| 1460 valid_cp_range(name_index, cp_size) && | |
| 1461 cp->tag_at(name_index).is_utf8(), | |
| 1462 "Illegal constant pool index %u for method name in class file %s", | |
| 1463 name_index, CHECK_(nullHandle)); | |
| 1464 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1465 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 1466 | |
| 1467 u2 signature_index = cfs->get_u2_fast(); | |
| 1468 guarantee_property( | |
| 1469 valid_cp_range(signature_index, cp_size) && | |
| 1470 cp->tag_at(signature_index).is_utf8(), | |
| 1471 "Illegal constant pool index %u for method signature in class file %s", | |
| 1472 signature_index, CHECK_(nullHandle)); | |
| 1473 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
| 1474 | |
| 1475 AccessFlags access_flags; | |
| 1476 if (name == vmSymbols::class_initializer_name()) { | |
| 1477 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1478 flags = JVM_ACC_STATIC; | |
| 1479 } else { | |
| 1480 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1481 } | |
| 1482 | |
| 1483 int args_size = -1; // only used when _need_verify is true | |
| 1484 if (_need_verify) { | |
| 1485 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1486 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1487 if (args_size > MAX_ARGS_SIZE) { | |
| 1488 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1489 } | |
| 1490 } | |
| 1491 | |
| 1492 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1493 | |
| 1494 // Default values for code and exceptions attribute elements | |
| 1495 u2 max_stack = 0; | |
| 1496 u2 max_locals = 0; | |
| 1497 u4 code_length = 0; | |
| 1498 u1* code_start = 0; | |
| 1499 u2 exception_table_length = 0; | |
| 1500 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1501 u2 checked_exceptions_length = 0; | |
| 1502 u2* checked_exceptions_start = NULL; | |
| 1503 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1504 int linenumber_table_length = 0; | |
| 1505 int total_lvt_length = 0; | |
| 1506 u2 lvt_cnt = 0; | |
| 1507 u2 lvtt_cnt = 0; | |
| 1508 bool lvt_allocated = false; | |
| 1509 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1510 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1511 u2* localvariable_table_length; | |
| 1512 u2** localvariable_table_start; | |
| 1513 u2* localvariable_type_table_length; | |
| 1514 u2** localvariable_type_table_start; | |
| 1515 bool parsed_code_attribute = false; | |
| 1516 bool parsed_checked_exceptions_attribute = false; | |
| 1517 bool parsed_stackmap_attribute = false; | |
| 1518 // stackmap attribute - JDK1.5 | |
| 1519 typeArrayHandle stackmap_data; | |
| 1520 u2 generic_signature_index = 0; | |
| 1521 u1* runtime_visible_annotations = NULL; | |
| 1522 int runtime_visible_annotations_length = 0; | |
| 1523 u1* runtime_invisible_annotations = NULL; | |
| 1524 int runtime_invisible_annotations_length = 0; | |
| 1525 u1* runtime_visible_parameter_annotations = NULL; | |
| 1526 int runtime_visible_parameter_annotations_length = 0; | |
| 1527 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1528 int runtime_invisible_parameter_annotations_length = 0; | |
| 1529 u1* annotation_default = NULL; | |
| 1530 int annotation_default_length = 0; | |
| 1531 | |
| 1532 // Parse code and exceptions attribute | |
| 1533 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1534 while (method_attributes_count--) { | |
| 1535 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1536 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1537 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1538 check_property( | |
| 1539 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1540 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1541 "Invalid method attribute name index %u in class file %s", | |
| 1542 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1543 | |
| 1544 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
| 1545 if (method_attribute_name == vmSymbols::tag_code()) { | |
| 1546 // Parse Code attribute | |
| 1547 if (_need_verify) { | |
| 1548 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1549 "Code attribute in native or abstract methods in class file %s", | |
| 1550 CHECK_(nullHandle)); | |
| 1551 } | |
| 1552 if (parsed_code_attribute) { | |
| 1553 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1554 } | |
| 1555 parsed_code_attribute = true; | |
| 1556 | |
| 1557 // Stack size, locals size, and code size | |
| 1558 if (_major_version == 45 && _minor_version <= 2) { | |
| 1559 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1560 max_stack = cfs->get_u1_fast(); | |
| 1561 max_locals = cfs->get_u1_fast(); | |
| 1562 code_length = cfs->get_u2_fast(); | |
| 1563 } else { | |
| 1564 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1565 max_stack = cfs->get_u2_fast(); | |
| 1566 max_locals = cfs->get_u2_fast(); | |
| 1567 code_length = cfs->get_u4_fast(); | |
| 1568 } | |
| 1569 if (_need_verify) { | |
| 1570 guarantee_property(args_size <= max_locals, | |
| 1571 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1572 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1573 "Invalid method Code length %u in class file %s", | |
| 1574 code_length, CHECK_(nullHandle)); | |
| 1575 } | |
| 1576 // Code pointer | |
| 1577 code_start = cfs->get_u1_buffer(); | |
| 1578 assert(code_start != NULL, "null code start"); | |
| 1579 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1580 cfs->skip_u1_fast(code_length); | |
| 1581 | |
| 1582 // Exception handler table | |
| 1583 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1584 exception_table_length = cfs->get_u2_fast(); | |
| 1585 if (exception_table_length > 0) { | |
| 1586 exception_handlers = | |
| 1587 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1588 } | |
| 1589 | |
| 1590 // Parse additional attributes in code attribute | |
| 1591 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1592 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1593 |
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1594 unsigned int calculated_attribute_length = 0; |
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1595 |
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1596 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1597 calculated_attribute_length = |
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1598 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1599 } else { |
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1600 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1601 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1602 } |
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1603 calculated_attribute_length += |
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1604 code_length + |
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1605 sizeof(exception_table_length) + |
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1606 sizeof(code_attributes_count) + |
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1607 exception_table_length * |
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1608 ( sizeof(u2) + // start_pc |
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1609 sizeof(u2) + // end_pc |
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1610 sizeof(u2) + // handler_pc |
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1611 sizeof(u2) ); // catch_type_index |
| 0 | 1612 |
| 1613 while (code_attributes_count--) { | |
| 1614 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1615 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1616 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1617 calculated_attribute_length += code_attribute_length + | |
| 1618 sizeof(code_attribute_name_index) + | |
| 1619 sizeof(code_attribute_length); | |
| 1620 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1621 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1622 "Invalid code attribute name index %u in class file %s", | |
| 1623 code_attribute_name_index, | |
| 1624 CHECK_(nullHandle)); | |
| 1625 if (LoadLineNumberTables && | |
| 1626 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1627 // Parse and compress line number table | |
| 1628 parse_linenumber_table(code_attribute_length, code_length, | |
| 1629 &linenumber_table, CHECK_(nullHandle)); | |
| 1630 | |
| 1631 } else if (LoadLocalVariableTables && | |
| 1632 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1633 // Parse local variable table | |
| 1634 if (!lvt_allocated) { | |
| 1635 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1636 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1637 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1638 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1639 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1640 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1641 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1642 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1643 lvt_allocated = true; | |
| 1644 } | |
| 1645 if (lvt_cnt == max_lvt_cnt) { | |
| 1646 max_lvt_cnt <<= 1; | |
| 1647 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1648 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1649 } | |
| 1650 localvariable_table_start[lvt_cnt] = | |
| 1651 parse_localvariable_table(code_length, | |
| 1652 max_locals, | |
| 1653 code_attribute_length, | |
| 1654 cp, | |
| 1655 &localvariable_table_length[lvt_cnt], | |
| 1656 false, // is not LVTT | |
| 1657 CHECK_(nullHandle)); | |
| 1658 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1659 lvt_cnt++; | |
| 1660 } else if (LoadLocalVariableTypeTables && | |
| 1661 _major_version >= JAVA_1_5_VERSION && | |
| 1662 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1663 if (!lvt_allocated) { | |
| 1664 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1665 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1666 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1667 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1668 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1669 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1670 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1671 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1672 lvt_allocated = true; | |
| 1673 } | |
| 1674 // Parse local variable type table | |
| 1675 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1676 max_lvtt_cnt <<= 1; | |
| 1677 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1678 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1679 } | |
| 1680 localvariable_type_table_start[lvtt_cnt] = | |
| 1681 parse_localvariable_table(code_length, | |
| 1682 max_locals, | |
| 1683 code_attribute_length, | |
| 1684 cp, | |
| 1685 &localvariable_type_table_length[lvtt_cnt], | |
| 1686 true, // is LVTT | |
| 1687 CHECK_(nullHandle)); | |
| 1688 lvtt_cnt++; | |
| 1689 } else if (UseSplitVerifier && | |
| 1690 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1691 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1692 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1693 if (parsed_stackmap_attribute) { | |
| 1694 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1695 } | |
| 1696 typeArrayOop sm = | |
| 1697 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1698 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1699 parsed_stackmap_attribute = true; | |
| 1700 } else { | |
| 1701 // Skip unknown attributes | |
| 1702 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1703 } | |
| 1704 } | |
| 1705 // check method attribute length | |
| 1706 if (_need_verify) { | |
| 1707 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1708 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1709 } | |
| 1710 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1711 // Parse Exceptions attribute | |
| 1712 if (parsed_checked_exceptions_attribute) { | |
| 1713 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1714 } | |
| 1715 parsed_checked_exceptions_attribute = true; | |
| 1716 checked_exceptions_start = | |
| 1717 parse_checked_exceptions(&checked_exceptions_length, | |
| 1718 method_attribute_length, | |
| 1719 cp, CHECK_(nullHandle)); | |
| 1720 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1721 if (method_attribute_length != 0) { | |
| 1722 classfile_parse_error( | |
| 1723 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1724 method_attribute_length, CHECK_(nullHandle)); | |
| 1725 } | |
| 1726 // Should we check that there hasn't already been a synthetic attribute? | |
| 1727 access_flags.set_is_synthetic(); | |
| 1728 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1729 if (method_attribute_length != 0) { | |
| 1730 classfile_parse_error( | |
| 1731 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1732 method_attribute_length, CHECK_(nullHandle)); | |
| 1733 } | |
| 1734 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1735 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1736 if (method_attribute_length != 2) { | |
| 1737 classfile_parse_error( | |
| 1738 "Invalid Signature attribute length %u in class file %s", | |
| 1739 method_attribute_length, CHECK_(nullHandle)); | |
| 1740 } | |
| 1741 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1742 generic_signature_index = cfs->get_u2_fast(); | |
| 1743 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1744 runtime_visible_annotations_length = method_attribute_length; | |
| 1745 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1746 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1747 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1748 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1749 runtime_invisible_annotations_length = method_attribute_length; | |
| 1750 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1751 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1752 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1753 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1754 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1755 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1756 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1757 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1758 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1759 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1760 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1761 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1762 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1763 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1764 annotation_default_length = method_attribute_length; | |
| 1765 annotation_default = cfs->get_u1_buffer(); | |
| 1766 assert(annotation_default != NULL, "null annotation default"); | |
| 1767 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1768 } else { | |
| 1769 // Skip unknown attributes | |
| 1770 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1771 } | |
| 1772 } else { | |
| 1773 // Skip unknown attributes | |
| 1774 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1775 } | |
| 1776 } | |
| 1777 | |
| 1778 if (linenumber_table != NULL) { | |
| 1779 linenumber_table->write_terminator(); | |
| 1780 linenumber_table_length = linenumber_table->position(); | |
| 1781 } | |
| 1782 | |
| 1783 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1784 if (_need_verify) { | |
| 1785 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1786 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1787 } | |
| 1788 | |
| 1789 // All sizing information for a methodOop is finally available, now create it | |
| 1790 methodOop m_oop = oopFactory::new_method( | |
| 1791 code_length, access_flags, linenumber_table_length, | |
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1793 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
| 0 | 1794 methodHandle m (THREAD, m_oop); |
| 1795 | |
| 1796 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1797 | |
| 1798 // Fill in information from fixed part (access_flags already set) | |
| 1799 m->set_constants(cp()); | |
| 1800 m->set_name_index(name_index); | |
| 1801 m->set_signature_index(signature_index); | |
| 1802 m->set_generic_signature_index(generic_signature_index); | |
| 1803 #ifdef CC_INTERP | |
| 1804 // hmm is there a gc issue here?? | |
| 1805 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1806 m->set_result_index(rtf.type()); | |
| 1807 #endif | |
| 1808 | |
| 1809 if (args_size >= 0) { | |
| 1810 m->set_size_of_parameters(args_size); | |
| 1811 } else { | |
| 1812 m->compute_size_of_parameters(THREAD); | |
| 1813 } | |
| 1814 #ifdef ASSERT | |
| 1815 if (args_size >= 0) { | |
| 1816 m->compute_size_of_parameters(THREAD); | |
| 1817 assert(args_size == m->size_of_parameters(), ""); | |
| 1818 } | |
| 1819 #endif | |
| 1820 | |
| 1821 // Fill in code attribute information | |
| 1822 m->set_max_stack(max_stack); | |
| 1823 m->set_max_locals(max_locals); | |
| 1824 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1825 | |
| 1826 /** | |
| 1827 * The exception_table field is the flag used to indicate | |
| 1828 * that the methodOop and it's associated constMethodOop are partially | |
| 1829 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1830 * the field is set, the oops are considered fully initialized so make | |
| 1831 * sure that the oops can pass verification when this field is set. | |
| 1832 */ | |
| 1833 m->set_exception_table(exception_handlers()); | |
| 1834 | |
| 1835 // Copy byte codes | |
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1836 m->set_code(code_start); |
| 0 | 1837 |
| 1838 // Copy line number table | |
| 1839 if (linenumber_table != NULL) { | |
| 1840 memcpy(m->compressed_linenumber_table(), | |
| 1841 linenumber_table->buffer(), linenumber_table_length); | |
| 1842 } | |
| 1843 | |
| 1844 // Copy checked exceptions | |
| 1845 if (checked_exceptions_length > 0) { | |
| 1846 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1847 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1848 } | |
| 1849 | |
| 1850 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1851 * | |
| 1852 * Rules for LVT's and LVTT's are: | |
| 1853 * - There can be any number of LVT's and LVTT's. | |
| 1854 * - If there are n LVT's, it is the same as if there was just | |
| 1855 * one LVT containing all the entries from the n LVT's. | |
| 1856 * - There may be no more than one LVT entry per local variable. | |
| 1857 * Two LVT entries are 'equal' if these fields are the same: | |
| 1858 * start_pc, length, name, slot | |
| 1859 * - There may be no more than one LVTT entry per each LVT entry. | |
| 1860 * Each LVTT entry has to match some LVT entry. | |
| 1861 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 1862 */ | |
| 1863 if (total_lvt_length > 0) { | |
| 1864 int tbl_no, idx; | |
| 1865 | |
| 1866 promoted_flags->set_has_localvariable_table(); | |
| 1867 | |
| 1868 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 1869 initialize_hashtable(lvt_Hash); | |
| 1870 | |
| 1871 // To fill LocalVariableTable in | |
| 1872 Classfile_LVT_Element* cf_lvt; | |
| 1873 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 1874 | |
| 1875 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 1876 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 1877 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 1878 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 1879 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 1880 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 1881 && _need_verify | |
| 1882 && _major_version >= JAVA_1_5_VERSION ) { | |
| 1883 clear_hashtable(lvt_Hash); | |
| 1884 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 1885 "entry for '%s' in class file %s", | |
| 1886 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 1887 CHECK_(nullHandle)); | |
| 1888 } | |
| 1889 } | |
| 1890 } | |
| 1891 | |
| 1892 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 1893 Classfile_LVT_Element* cf_lvtt; | |
| 1894 LocalVariableTableElement lvtt_elem; | |
| 1895 | |
| 1896 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 1897 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 1898 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 1899 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 1900 int index = hash(&lvtt_elem); | |
| 1901 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 1902 if (entry == NULL) { | |
| 1903 if (_need_verify) { | |
| 1904 clear_hashtable(lvt_Hash); | |
| 1905 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 1906 "does not match any LVT entry", | |
| 1907 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1908 CHECK_(nullHandle)); | |
| 1909 } | |
| 1910 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 1911 clear_hashtable(lvt_Hash); | |
| 1912 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 1913 "entry for '%s' in class file %s", | |
| 1914 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1915 CHECK_(nullHandle)); | |
| 1916 } else { | |
| 1917 // to add generic signatures into LocalVariableTable | |
| 1918 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 1919 } | |
| 1920 } | |
| 1921 } | |
| 1922 clear_hashtable(lvt_Hash); | |
| 1923 } | |
| 1924 | |
| 1925 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 1926 runtime_visible_annotations_length, | |
| 1927 runtime_invisible_annotations, | |
| 1928 runtime_invisible_annotations_length, | |
| 1929 CHECK_(nullHandle)); | |
| 1930 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 1931 runtime_visible_parameter_annotations_length, | |
| 1932 runtime_invisible_parameter_annotations, | |
| 1933 runtime_invisible_parameter_annotations_length, | |
| 1934 CHECK_(nullHandle)); | |
| 1935 *method_default_annotations = assemble_annotations(annotation_default, | |
| 1936 annotation_default_length, | |
| 1937 NULL, | |
| 1938 0, | |
| 1939 CHECK_(nullHandle)); | |
| 1940 | |
| 1941 if (name() == vmSymbols::finalize_method_name() && | |
| 1942 signature() == vmSymbols::void_method_signature()) { | |
| 1943 if (m->is_empty_method()) { | |
| 1944 _has_empty_finalizer = true; | |
| 1945 } else { | |
| 1946 _has_finalizer = true; | |
| 1947 } | |
| 1948 } | |
| 1949 if (name() == vmSymbols::object_initializer_name() && | |
| 1950 signature() == vmSymbols::void_method_signature() && | |
| 1951 m->is_vanilla_constructor()) { | |
| 1952 _has_vanilla_constructor = true; | |
| 1953 } | |
| 1954 | |
|
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1955 if (EnableMethodHandles && (m->is_method_handle_invoke() || |
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1956 m->is_method_handle_adapter())) { |
| 710 | 1957 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), |
| 1958 "Method handle invokers must be defined internally to the VM", nullHandle); | |
| 1959 } | |
| 1960 | |
| 0 | 1961 return m; |
| 1962 } | |
| 1963 | |
| 1964 | |
| 1965 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1966 // from the methods back up to the containing klass. These flag values | |
| 1967 // are added to klass's access_flags. | |
| 1968 | |
| 1969 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 1970 AccessFlags* promoted_flags, | |
| 1971 bool* has_final_method, | |
| 1972 objArrayOop* methods_annotations_oop, | |
| 1973 objArrayOop* methods_parameter_annotations_oop, | |
| 1974 objArrayOop* methods_default_annotations_oop, | |
| 1975 TRAPS) { | |
| 1976 ClassFileStream* cfs = stream(); | |
| 1977 objArrayHandle nullHandle; | |
| 1978 typeArrayHandle method_annotations; | |
| 1979 typeArrayHandle method_parameter_annotations; | |
| 1980 typeArrayHandle method_default_annotations; | |
| 1981 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1982 u2 length = cfs->get_u2_fast(); | |
| 1983 if (length == 0) { | |
| 1984 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 1985 } else { | |
| 1986 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1987 objArrayHandle methods(THREAD, m); | |
| 1988 HandleMark hm(THREAD); | |
| 1989 objArrayHandle methods_annotations; | |
| 1990 objArrayHandle methods_parameter_annotations; | |
| 1991 objArrayHandle methods_default_annotations; | |
| 1992 for (int index = 0; index < length; index++) { | |
| 1993 methodHandle method = parse_method(cp, is_interface, | |
| 1994 promoted_flags, | |
| 1995 &method_annotations, | |
| 1996 &method_parameter_annotations, | |
| 1997 &method_default_annotations, | |
| 1998 CHECK_(nullHandle)); | |
| 1999 if (method->is_final()) { | |
| 2000 *has_final_method = true; | |
| 2001 } | |
| 2002 methods->obj_at_put(index, method()); | |
| 2003 if (method_annotations.not_null()) { | |
| 2004 if (methods_annotations.is_null()) { | |
| 2005 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2006 methods_annotations = objArrayHandle(THREAD, md); | |
| 2007 } | |
| 2008 methods_annotations->obj_at_put(index, method_annotations()); | |
| 2009 } | |
| 2010 if (method_parameter_annotations.not_null()) { | |
| 2011 if (methods_parameter_annotations.is_null()) { | |
| 2012 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2013 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 2014 } | |
| 2015 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 2016 } | |
| 2017 if (method_default_annotations.not_null()) { | |
| 2018 if (methods_default_annotations.is_null()) { | |
| 2019 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2020 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 2021 } | |
| 2022 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 2023 } | |
| 2024 } | |
| 2025 if (_need_verify && length > 1) { | |
| 2026 // Check duplicated methods | |
| 2027 ResourceMark rm(THREAD); | |
| 2028 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2029 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 2030 initialize_hashtable(names_and_sigs); | |
| 2031 bool dup = false; | |
| 2032 { | |
| 2033 debug_only(No_Safepoint_Verifier nsv;) | |
| 2034 for (int i = 0; i < length; i++) { | |
| 2035 methodOop m = (methodOop)methods->obj_at(i); | |
| 2036 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 2037 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 2038 dup = true; | |
| 2039 break; | |
| 2040 } | |
| 2041 } | |
| 2042 } | |
| 2043 if (dup) { | |
| 2044 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 2045 CHECK_(nullHandle)); | |
| 2046 } | |
| 2047 } | |
| 2048 | |
| 2049 *methods_annotations_oop = methods_annotations(); | |
| 2050 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 2051 *methods_default_annotations_oop = methods_default_annotations(); | |
| 2052 | |
| 2053 return methods; | |
| 2054 } | |
| 2055 } | |
| 2056 | |
| 2057 | |
| 2058 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 2059 objArrayHandle methods_annotations, | |
| 2060 objArrayHandle methods_parameter_annotations, | |
| 2061 objArrayHandle methods_default_annotations, | |
| 2062 TRAPS) { | |
| 2063 typeArrayHandle nullHandle; | |
| 2064 int length = methods()->length(); | |
| 2065 // If JVMTI original method ordering is enabled we have to | |
| 2066 // remember the original class file ordering. | |
| 2067 // We temporarily use the vtable_index field in the methodOop to store the | |
| 2068 // class file index, so we can read in after calling qsort. | |
| 2069 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2070 for (int index = 0; index < length; index++) { | |
| 2071 methodOop m = methodOop(methods->obj_at(index)); | |
| 2072 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 2073 m->set_vtable_index(index); | |
| 2074 } | |
| 2075 } | |
| 2076 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
| 2077 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
| 2078 methodOopDesc::sort_methods(methods(), | |
| 2079 methods_annotations(), | |
| 2080 methods_parameter_annotations(), | |
| 2081 methods_default_annotations()); | |
| 2082 | |
| 2083 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 2084 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2085 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 2086 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 2087 for (int index = 0; index < length; index++) { | |
| 2088 methodOop m = methodOop(methods->obj_at(index)); | |
| 2089 int old_index = m->vtable_index(); | |
| 2090 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 2091 method_ordering->int_at_put(index, old_index); | |
| 2092 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 2093 } | |
| 2094 return method_ordering; | |
| 2095 } else { | |
| 2096 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 2097 } | |
| 2098 } | |
| 2099 | |
| 2100 | |
| 2101 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2102 ClassFileStream* cfs = stream(); | |
| 2103 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 2104 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 2105 check_property( | |
| 2106 valid_cp_range(sourcefile_index, cp->length()) && | |
| 2107 cp->tag_at(sourcefile_index).is_utf8(), | |
| 2108 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 2109 sourcefile_index, CHECK); | |
| 2110 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 2111 } | |
| 2112 | |
| 2113 | |
| 2114 | |
| 2115 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 2116 instanceKlassHandle k, | |
| 2117 int length, TRAPS) { | |
| 2118 ClassFileStream* cfs = stream(); | |
| 2119 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 2120 assert(sde_buffer != NULL, "null sde buffer"); | |
| 2121 | |
| 2122 // Don't bother storing it if there is no way to retrieve it | |
| 2123 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 2124 // Optimistically assume that only 1 byte UTF format is used | |
| 2125 // (common case) | |
| 2126 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
| 2127 length, CHECK); | |
| 2128 k->set_source_debug_extension(sde_symbol); | |
| 2129 } | |
| 2130 // Got utf8 string, set stream position forward | |
| 2131 cfs->skip_u1(length, CHECK); | |
| 2132 } | |
| 2133 | |
| 2134 | |
| 2135 // Inner classes can be static, private or protected (classic VM does this) | |
| 2136 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 2137 | |
| 2138 // Return number of classes in the inner classes attribute table | |
| 2139 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2140 ClassFileStream* cfs = stream(); | |
| 2141 cfs->guarantee_more(2, CHECK_0); // length | |
| 2142 u2 length = cfs->get_u2_fast(); | |
| 2143 | |
| 2144 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 2145 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 2146 typeArrayHandle inner_classes(THREAD, ic); | |
| 2147 int index = 0; | |
| 2148 int cp_size = cp->length(); | |
| 2149 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 2150 for (int n = 0; n < length; n++) { | |
| 2151 // Inner class index | |
| 2152 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 2153 check_property( | |
| 2154 inner_class_info_index == 0 || | |
| 2155 (valid_cp_range(inner_class_info_index, cp_size) && | |
|
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2156 is_klass_reference(cp, inner_class_info_index)), |
| 0 | 2157 "inner_class_info_index %u has bad constant type in class file %s", |
| 2158 inner_class_info_index, CHECK_0); | |
| 2159 // Outer class index | |
| 2160 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 2161 check_property( | |
| 2162 outer_class_info_index == 0 || | |
| 2163 (valid_cp_range(outer_class_info_index, cp_size) && | |
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2164 is_klass_reference(cp, outer_class_info_index)), |
| 0 | 2165 "outer_class_info_index %u has bad constant type in class file %s", |
| 2166 outer_class_info_index, CHECK_0); | |
| 2167 // Inner class name | |
| 2168 u2 inner_name_index = cfs->get_u2_fast(); | |
| 2169 check_property( | |
| 2170 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 2171 cp->tag_at(inner_name_index).is_utf8()), | |
| 2172 "inner_name_index %u has bad constant type in class file %s", | |
| 2173 inner_name_index, CHECK_0); | |
| 2174 if (_need_verify) { | |
| 2175 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 2176 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 2177 } | |
| 2178 // Access flags | |
| 2179 AccessFlags inner_access_flags; | |
| 2180 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 2181 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2182 // Set abstract bit for old class files for backward compatibility | |
| 2183 flags |= JVM_ACC_ABSTRACT; | |
| 2184 } | |
| 2185 verify_legal_class_modifiers(flags, CHECK_0); | |
| 2186 inner_access_flags.set_flags(flags); | |
| 2187 | |
| 2188 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 2189 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 2190 inner_classes->short_at_put(index++, inner_name_index); | |
| 2191 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 2192 } | |
| 2193 | |
| 2194 // 4347400: make sure there's no duplicate entry in the classes array | |
| 2195 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2196 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 2197 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 2198 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 2199 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 2200 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 2201 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 2202 "Duplicate entry in InnerClasses in class file %s", | |
| 2203 CHECK_0); | |
| 2204 } | |
| 2205 } | |
| 2206 } | |
| 2207 | |
| 2208 // Update instanceKlass with inner class info. | |
| 2209 k->set_inner_classes(inner_classes()); | |
| 2210 return length; | |
| 2211 } | |
| 2212 | |
| 2213 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2214 k->set_is_synthetic(); | |
| 2215 } | |
| 2216 | |
| 2217 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2218 ClassFileStream* cfs = stream(); | |
| 2219 u2 signature_index = cfs->get_u2(CHECK); | |
| 2220 check_property( | |
| 2221 valid_cp_range(signature_index, cp->length()) && | |
| 2222 cp->tag_at(signature_index).is_utf8(), | |
| 2223 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 2224 signature_index, CHECK); | |
| 2225 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 2226 } | |
| 2227 | |
| 2228 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2229 ClassFileStream* cfs = stream(); | |
| 2230 // Set inner classes attribute to default sentinel | |
| 2231 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 2232 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 2233 u2 attributes_count = cfs->get_u2_fast(); | |
| 2234 bool parsed_sourcefile_attribute = false; | |
| 2235 bool parsed_innerclasses_attribute = false; | |
| 2236 bool parsed_enclosingmethod_attribute = false; | |
| 2237 u1* runtime_visible_annotations = NULL; | |
| 2238 int runtime_visible_annotations_length = 0; | |
| 2239 u1* runtime_invisible_annotations = NULL; | |
| 2240 int runtime_invisible_annotations_length = 0; | |
| 2241 // Iterate over attributes | |
| 2242 while (attributes_count--) { | |
| 2243 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2244 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2245 u4 attribute_length = cfs->get_u4_fast(); | |
| 2246 check_property( | |
| 2247 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2248 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2249 "Attribute name has bad constant pool index %u in class file %s", | |
| 2250 attribute_name_index, CHECK); | |
| 2251 symbolOop tag = cp->symbol_at(attribute_name_index); | |
| 2252 if (tag == vmSymbols::tag_source_file()) { | |
| 2253 // Check for SourceFile tag | |
| 2254 if (_need_verify) { | |
| 2255 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2256 } | |
| 2257 if (parsed_sourcefile_attribute) { | |
| 2258 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2259 } else { | |
| 2260 parsed_sourcefile_attribute = true; | |
| 2261 } | |
| 2262 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2263 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2264 // Check for SourceDebugExtension tag | |
| 2265 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2266 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2267 // Check for InnerClasses tag | |
| 2268 if (parsed_innerclasses_attribute) { | |
| 2269 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2270 } else { | |
| 2271 parsed_innerclasses_attribute = true; | |
| 2272 } | |
| 2273 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2274 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2275 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2276 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2277 } | |
| 2278 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2279 // Check for Synthetic tag | |
| 2280 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2281 if (attribute_length != 0) { | |
| 2282 classfile_parse_error( | |
| 2283 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2284 attribute_length, CHECK); | |
| 2285 } | |
| 2286 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2287 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2288 // Check for Deprecatd tag - 4276120 | |
| 2289 if (attribute_length != 0) { | |
| 2290 classfile_parse_error( | |
| 2291 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2292 attribute_length, CHECK); | |
| 2293 } | |
| 2294 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2295 if (tag == vmSymbols::tag_signature()) { | |
| 2296 if (attribute_length != 2) { | |
| 2297 classfile_parse_error( | |
| 2298 "Wrong Signature attribute length %u in class file %s", | |
| 2299 attribute_length, CHECK); | |
| 2300 } | |
| 2301 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2302 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2303 runtime_visible_annotations_length = attribute_length; | |
| 2304 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2305 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2306 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2307 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2308 runtime_invisible_annotations_length = attribute_length; | |
| 2309 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2310 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2311 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2312 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2313 if (parsed_enclosingmethod_attribute) { | |
| 2314 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2315 } else { | |
| 2316 parsed_enclosingmethod_attribute = true; | |
| 2317 } | |
| 2318 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2319 u2 class_index = cfs->get_u2_fast(); | |
| 2320 u2 method_index = cfs->get_u2_fast(); | |
| 2321 if (class_index == 0) { | |
| 2322 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2323 } | |
| 2324 // Validate the constant pool indices and types | |
| 2325 if (!cp->is_within_bounds(class_index) || | |
|
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2326 !is_klass_reference(cp, class_index)) { |
| 0 | 2327 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
| 2328 } | |
| 2329 if (method_index != 0 && | |
| 2330 (!cp->is_within_bounds(method_index) || | |
| 2331 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2332 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2333 } | |
| 2334 k->set_enclosing_method_indices(class_index, method_index); | |
| 2335 } else { | |
| 2336 // Unknown attribute | |
| 2337 cfs->skip_u1(attribute_length, CHECK); | |
| 2338 } | |
| 2339 } else { | |
| 2340 // Unknown attribute | |
| 2341 cfs->skip_u1(attribute_length, CHECK); | |
| 2342 } | |
| 2343 } | |
| 2344 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2345 runtime_visible_annotations_length, | |
| 2346 runtime_invisible_annotations, | |
| 2347 runtime_invisible_annotations_length, | |
| 2348 CHECK); | |
| 2349 k->set_class_annotations(annotations()); | |
| 2350 } | |
| 2351 | |
| 2352 | |
| 2353 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2354 int runtime_visible_annotations_length, | |
| 2355 u1* runtime_invisible_annotations, | |
| 2356 int runtime_invisible_annotations_length, TRAPS) { | |
| 2357 typeArrayHandle annotations; | |
| 2358 if (runtime_visible_annotations != NULL || | |
| 2359 runtime_invisible_annotations != NULL) { | |
| 2360 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2361 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2362 annotations = typeArrayHandle(THREAD, anno); | |
| 2363 if (runtime_visible_annotations != NULL) { | |
| 2364 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2365 } | |
| 2366 if (runtime_invisible_annotations != NULL) { | |
| 2367 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2368 } | |
| 2369 } | |
| 2370 return annotations; | |
| 2371 } | |
| 2372 | |
| 2373 | |
| 2374 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2375 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2376 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2377 if (fd->has_initial_value()) { | |
| 2378 BasicType t = fd->field_type(); | |
| 2379 switch (t) { | |
| 2380 case T_BYTE: | |
| 2381 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2382 break; | |
| 2383 case T_BOOLEAN: | |
| 2384 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2385 break; | |
| 2386 case T_CHAR: | |
| 2387 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2388 break; | |
| 2389 case T_SHORT: | |
| 2390 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2391 break; | |
| 2392 case T_INT: | |
| 2393 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2394 break; | |
| 2395 case T_FLOAT: | |
| 2396 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2397 break; | |
| 2398 case T_DOUBLE: | |
| 2399 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2400 break; | |
| 2401 case T_LONG: | |
| 2402 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2403 break; | |
| 2404 case T_OBJECT: | |
| 2405 { | |
| 2406 #ifdef ASSERT | |
| 2407 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
| 2408 assert(fd->signature() == sym, "just checking"); | |
| 2409 #endif | |
| 2410 oop string = fd->string_initial_value(CHECK); | |
| 2411 h_k()->obj_field_put(fd->offset(), string); | |
| 2412 } | |
| 2413 break; | |
| 2414 default: | |
| 2415 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2416 "Illegal ConstantValue attribute in class file"); | |
| 2417 } | |
| 2418 } | |
| 2419 } | |
| 2420 | |
| 2421 | |
| 2422 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2423 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2424 // This code is for compatibility with earlier jdk's that do not | |
| 2425 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2426 // the check for the "discovered" field should issue a warning if | |
| 2427 // the field is not found. For 1.6 this code should be issue a | |
| 2428 // fatal error if the "discovered" field is not found. | |
| 2429 // | |
| 2430 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2431 // next type of non-static oops leaves room for the fake oop. | |
| 2432 // Do not increment next_nonstatic_oop_offset so that the | |
| 2433 // fake oop is place after the java.lang.ref.Reference oop | |
| 2434 // fields. | |
| 2435 // | |
| 2436 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2437 // field. If it is not present, artifically create a field for it. | |
| 2438 // This allows this VM to run on early JDK where the field is not | |
| 2439 // present. | |
| 2440 | |
| 2441 // | |
| 2442 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2443 // next type of non-static oops leaves room for the fake oop. | |
| 2444 // Do not increment next_nonstatic_oop_offset so that the | |
| 2445 // fake oop is place after the java.lang.ref.Reference oop | |
| 2446 // fields. | |
| 2447 // | |
| 2448 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2449 // field. If it is not present, artifically create a field for it. | |
| 2450 // This allows this VM to run on early JDK where the field is not | |
| 2451 // present. | |
| 2452 int reference_sig_index = 0; | |
| 2453 int reference_name_index = 0; | |
| 2454 int reference_index = 0; | |
| 2455 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2456 const int n = (*fields_ptr)()->length(); | |
| 2457 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2458 int name_index = | |
| 2459 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2460 int sig_index = | |
| 2461 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2462 symbolOop f_name = cp->symbol_at(name_index); | |
| 2463 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2464 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
| 2465 // Save the index for reference signature for later use. | |
| 2466 // The fake discovered field does not entries in the | |
| 2467 // constant pool so the index for its signature cannot | |
| 2468 // be extracted from the constant pool. It will need | |
| 2469 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2470 // so same an index for that signature. | |
| 2471 reference_sig_index = sig_index; | |
| 2472 reference_name_index = name_index; | |
| 2473 reference_index = i; | |
| 2474 } | |
| 2475 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2476 f_sig == vmSymbols::reference_signature()) { | |
| 2477 // The values below are fake but will force extra | |
| 2478 // non-static oop fields and a corresponding non-static | |
| 2479 // oop map block to be allocated. | |
| 2480 extra = 0; | |
| 2481 break; | |
| 2482 } | |
| 2483 } | |
| 2484 if (extra != 0) { | |
| 2485 fac_ptr->nonstatic_oop_count += extra; | |
| 2486 // Add the additional entry to "fields" so that the klass | |
| 2487 // contains the "discoverd" field and the field will be initialized | |
| 2488 // in instances of the object. | |
| 2489 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2490 instanceKlass::next_offset; | |
| 2491 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2492 fields_with_fix_length, CHECK); | |
| 2493 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2494 | |
| 2495 // Take everything from the original but the length. | |
| 2496 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2497 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2498 } | |
| 2499 | |
| 2500 // Add the fake field at the end. | |
| 2501 int i = (*fields_ptr)->length(); | |
| 2502 // There is no name index for the fake "discovered" field nor | |
| 2503 // signature but a signature is needed so that the field will | |
| 2504 // be properly initialized. Use one found for | |
| 2505 // one of the other reference fields. Be sure the index for the | |
| 2506 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2507 // name is checked. That check is by passed for the last nonstatic | |
| 2508 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2509 // this artificial "discovered" field. An assertion checks that | |
| 2510 // the name index is 0. | |
| 2511 assert(reference_index != 0, "Missing signature for reference"); | |
| 2512 | |
| 2513 int j; | |
| 2514 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2515 fields_with_fix->ushort_at_put(i + j, | |
| 2516 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2517 } | |
| 2518 // Clear the public access flag and set the private access flag. | |
| 2519 short flags; | |
| 2520 flags = | |
| 2521 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2522 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2523 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2524 flags = flags | JVM_ACC_PRIVATE; | |
| 2525 AccessFlags access_flags; | |
| 2526 access_flags.set_flags(flags); | |
| 2527 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2528 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2529 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2530 flags); | |
| 2531 | |
| 2532 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2533 == reference_name_index, "The fake reference name is incorrect"); | |
| 2534 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2535 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2536 // The type of the field is stored in the low_offset entry during | |
| 2537 // parsing. | |
| 2538 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2539 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2540 | |
| 2541 // "fields" is allocated in the permanent generation. Disgard | |
| 2542 // it and let it be collected. | |
| 2543 (*fields_ptr) = fields_with_fix; | |
| 2544 } | |
| 2545 return; | |
| 2546 } | |
| 2547 | |
| 2548 | |
| 2549 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2550 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2551 // Add fake fields for java.lang.Class instances | |
| 2552 // | |
| 2553 // This is not particularly nice. We should consider adding a | |
| 2554 // private transient object field at the Java level to | |
| 2555 // java.lang.Class. Alternatively we could add a subclass of | |
| 2556 // instanceKlass which provides an accessor and size computer for | |
| 2557 // this field, but that appears to be more code than this hack. | |
| 2558 // | |
| 2559 // NOTE that we wedge these in at the beginning rather than the | |
| 2560 // end of the object because the Class layout changed between JDK | |
| 2561 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2562 // nonstatic oop fields were added at the Java level. The offsets | |
| 2563 // of these fake fields can't change between these two JDK | |
| 2564 // versions because when the offsets are computed at bootstrap | |
| 2565 // time we don't know yet which version of the JDK we're running in. | |
| 2566 | |
| 2567 // The values below are fake but will force two non-static oop fields and | |
| 2568 // a corresponding non-static oop map block to be allocated. | |
| 2569 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2570 fac_ptr->nonstatic_oop_count += extra; | |
| 2571 } | |
| 2572 | |
| 2573 | |
| 2574 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2575 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2576 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2577 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2578 // location where the real java fields are placed. | |
| 2579 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
|
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|
2580 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2581 } |
| 2582 | |
| 2583 | |
| 710 | 2584 // Force MethodHandle.vmentry to be an unmanaged pointer. |
| 2585 // There is no way for a classfile to express this, so we must help it. | |
| 2586 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
| 2587 typeArrayHandle* fields_ptr, | |
| 2588 FieldAllocationCount *fac_ptr, | |
| 2589 TRAPS) { | |
| 2590 // Add fake fields for java.dyn.MethodHandle instances | |
| 2591 // | |
| 2592 // This is not particularly nice, but since there is no way to express | |
| 2593 // a native wordSize field in Java, we must do it at this level. | |
| 2594 | |
| 2595 if (!EnableMethodHandles) return; | |
| 2596 | |
| 2597 int word_sig_index = 0; | |
| 2598 const int cp_size = cp->length(); | |
| 2599 for (int index = 1; index < cp_size; index++) { | |
| 2600 if (cp->tag_at(index).is_utf8() && | |
| 2601 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
| 2602 word_sig_index = index; | |
| 2603 break; | |
| 2604 } | |
| 2605 } | |
| 2606 | |
| 2607 if (word_sig_index == 0) | |
| 2608 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2609 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
| 2610 | |
| 2611 bool found_vmentry = false; | |
| 2612 | |
| 2613 const int n = (*fields_ptr)()->length(); | |
| 2614 for (int i = 0; i < n; i += instanceKlass::next_offset) { | |
| 2615 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset); | |
| 2616 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2617 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2618 symbolOop f_name = cp->symbol_at(name_index); | |
| 2619 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2620 if (f_sig == vmSymbols::byte_signature() && | |
| 2621 f_name == vmSymbols::vmentry_name() && | |
| 2622 (acc_flags & JVM_ACC_STATIC) == 0) { | |
| 2623 // Adjust the field type from byte to an unmanaged pointer. | |
| 2624 assert(fac_ptr->nonstatic_byte_count > 0, ""); | |
| 2625 fac_ptr->nonstatic_byte_count -= 1; | |
| 2626 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset, | |
| 2627 word_sig_index); | |
| 1108 | 2628 fac_ptr->nonstatic_word_count += 1; |
| 2629 | |
| 2630 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i + instanceKlass::low_offset); | |
| 710 | 2631 assert(atype == NONSTATIC_BYTE, ""); |
| 2632 FieldAllocationType new_atype = NONSTATIC_WORD; | |
| 1108 | 2633 (*fields_ptr)->ushort_at_put(i + instanceKlass::low_offset, new_atype); |
| 710 | 2634 |
| 2635 found_vmentry = true; | |
| 2636 break; | |
| 2637 } | |
| 2638 } | |
| 2639 | |
| 2640 if (!found_vmentry) | |
| 2641 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2642 "missing vmentry byte field in java.dyn.MethodHandle"); | |
| 2643 | |
| 2644 } | |
| 2645 | |
| 2646 | |
| 0 | 2647 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, |
| 2648 Handle class_loader, | |
| 2649 Handle protection_domain, | |
| 710 | 2650 KlassHandle host_klass, |
|
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2651 GrowableArray<Handle>* cp_patches, |
| 0 | 2652 symbolHandle& parsed_name, |
|
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|
2653 bool verify, |
| 0 | 2654 TRAPS) { |
| 2655 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2656 // have modified it | |
| 2657 unsigned char *cached_class_file_bytes = NULL; | |
| 2658 jint cached_class_file_length; | |
| 2659 | |
| 2660 ClassFileStream* cfs = stream(); | |
| 2661 // Timing | |
|
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2662 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
|
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|
2663 JavaThread* jt = (JavaThread*) THREAD; |
|
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|
2664 |
|
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|
2665 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), |
|
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2666 ClassLoader::perf_class_parse_selftime(), |
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2667 NULL, |
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2668 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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|
2669 jt->get_thread_stat()->perf_timers_addr(), |
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|
2670 PerfClassTraceTime::PARSE_CLASS); |
| 0 | 2671 |
| 2672 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
| 2673 | |
| 2674 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2675 unsigned char* ptr = cfs->buffer(); | |
| 2676 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2677 | |
| 2678 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2679 &ptr, &end_ptr, | |
| 2680 &cached_class_file_bytes, | |
| 2681 &cached_class_file_length); | |
| 2682 | |
| 2683 if (ptr != cfs->buffer()) { | |
| 2684 // JVMTI agent has modified class file data. | |
| 2685 // Set new class file stream using JVMTI agent modified | |
| 2686 // class file data. | |
| 2687 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2688 set_stream(cfs); | |
| 2689 } | |
| 2690 } | |
| 2691 | |
| 710 | 2692 _host_klass = host_klass; |
|
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2693 _cp_patches = cp_patches; |
| 0 | 2694 |
| 2695 instanceKlassHandle nullHandle; | |
| 2696 | |
| 2697 // Figure out whether we can skip format checking (matching classic VM behavior) | |
|
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2698 _need_verify = Verifier::should_verify_for(class_loader(), verify); |
| 0 | 2699 |
| 2700 // Set the verify flag in stream | |
| 2701 cfs->set_verify(_need_verify); | |
| 2702 | |
| 2703 // Save the class file name for easier error message printing. | |
| 2704 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
| 2705 | |
| 2706 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2707 // Magic value | |
| 2708 u4 magic = cfs->get_u4_fast(); | |
| 2709 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2710 "Incompatible magic value %u in class file %s", | |
| 2711 magic, CHECK_(nullHandle)); | |
| 2712 | |
| 2713 // Version numbers | |
| 2714 u2 minor_version = cfs->get_u2_fast(); | |
| 2715 u2 major_version = cfs->get_u2_fast(); | |
| 2716 | |
| 2717 // Check version numbers - we check this even with verifier off | |
| 2718 if (!is_supported_version(major_version, minor_version)) { | |
| 2719 if (name.is_null()) { | |
| 2720 Exceptions::fthrow( | |
| 2721 THREAD_AND_LOCATION, | |
| 2722 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2723 "Unsupported major.minor version %u.%u", | |
| 2724 major_version, | |
| 2725 minor_version); | |
| 2726 } else { | |
| 2727 ResourceMark rm(THREAD); | |
| 2728 Exceptions::fthrow( | |
| 2729 THREAD_AND_LOCATION, | |
| 2730 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2731 "%s : Unsupported major.minor version %u.%u", | |
| 2732 name->as_C_string(), | |
| 2733 major_version, | |
| 2734 minor_version); | |
| 2735 } | |
| 2736 return nullHandle; | |
| 2737 } | |
| 2738 | |
| 2739 _major_version = major_version; | |
| 2740 _minor_version = minor_version; | |
| 2741 | |
| 2742 | |
| 2743 // Check if verification needs to be relaxed for this class file | |
| 2744 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2745 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2746 | |
| 2747 // Constant pool | |
| 2748 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
| 2749 int cp_size = cp->length(); | |
| 2750 | |
| 2751 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2752 | |
| 2753 // Access flags | |
| 2754 AccessFlags access_flags; | |
| 2755 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2756 | |
| 2757 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2758 // Set abstract bit for old class files for backward compatibility | |
| 2759 flags |= JVM_ACC_ABSTRACT; | |
| 2760 } | |
| 2761 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2762 access_flags.set_flags(flags); | |
| 2763 | |
| 2764 // This class and superclass | |
| 2765 instanceKlassHandle super_klass; | |
| 2766 u2 this_class_index = cfs->get_u2_fast(); | |
| 2767 check_property( | |
| 2768 valid_cp_range(this_class_index, cp_size) && | |
| 2769 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2770 "Invalid this class index %u in constant pool in class file %s", | |
| 2771 this_class_index, CHECK_(nullHandle)); | |
| 2772 | |
| 2773 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
| 2774 assert(class_name.not_null(), "class_name can't be null"); | |
| 2775 | |
| 2776 // It's important to set parsed_name *before* resolving the super class. | |
| 2777 // (it's used for cleanup by the caller if parsing fails) | |
| 2778 parsed_name = class_name; | |
| 2779 | |
| 2780 // Update _class_name which could be null previously to be class_name | |
| 2781 _class_name = class_name; | |
| 2782 | |
| 2783 // Don't need to check whether this class name is legal or not. | |
| 2784 // It has been checked when constant pool is parsed. | |
| 2785 // However, make sure it is not an array type. | |
| 2786 if (_need_verify) { | |
| 2787 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2788 "Bad class name in class file %s", | |
| 2789 CHECK_(nullHandle)); | |
| 2790 } | |
| 2791 | |
| 2792 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2793 | |
| 2794 // release all handles when parsing is done | |
| 2795 { HandleMark hm(THREAD); | |
| 2796 | |
| 2797 // Checks if name in class file matches requested name | |
| 2798 if (name.not_null() && class_name() != name()) { | |
| 2799 ResourceMark rm(THREAD); | |
| 2800 Exceptions::fthrow( | |
| 2801 THREAD_AND_LOCATION, | |
| 2802 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
| 2803 "%s (wrong name: %s)", | |
| 2804 name->as_C_string(), | |
| 2805 class_name->as_C_string() | |
| 2806 ); | |
| 2807 return nullHandle; | |
| 2808 } | |
| 2809 | |
| 2810 if (TraceClassLoadingPreorder) { | |
| 2811 tty->print("[Loading %s", name()->as_klass_external_name()); | |
| 2812 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
| 2813 tty->print_cr("]"); | |
| 2814 } | |
| 2815 | |
| 2816 u2 super_class_index = cfs->get_u2_fast(); | |
| 2817 if (super_class_index == 0) { | |
| 2818 check_property(class_name() == vmSymbols::java_lang_Object(), | |
| 2819 "Invalid superclass index %u in class file %s", | |
| 2820 super_class_index, | |
| 2821 CHECK_(nullHandle)); | |
| 2822 } else { | |
| 2823 check_property(valid_cp_range(super_class_index, cp_size) && | |
|
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2824 is_klass_reference(cp, super_class_index), |
| 0 | 2825 "Invalid superclass index %u in class file %s", |
| 2826 super_class_index, | |
| 2827 CHECK_(nullHandle)); | |
| 2828 // The class name should be legal because it is checked when parsing constant pool. | |
| 2829 // However, make sure it is not an array type. | |
|
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2830 bool is_array = false; |
|
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2831 if (cp->tag_at(super_class_index).is_klass()) { |
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2832 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2833 if (_need_verify) |
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2834 is_array = super_klass->oop_is_array(); |
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2835 } else if (_need_verify) { |
|
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2836 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2837 } |
| 0 | 2838 if (_need_verify) { |
|
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2839 guarantee_property(!is_array, |
| 0 | 2840 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
| 2841 } | |
| 2842 } | |
| 2843 | |
| 2844 // Interfaces | |
| 2845 u2 itfs_len = cfs->get_u2_fast(); | |
| 2846 objArrayHandle local_interfaces; | |
| 2847 if (itfs_len == 0) { | |
| 2848 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2849 } else { | |
|
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2850 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); |
| 0 | 2851 } |
| 2852 | |
| 2853 // Fields (offsets are filled in later) | |
| 2854 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 2855 objArrayHandle fields_annotations; | |
| 2856 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 2857 // Methods | |
| 2858 bool has_final_method = false; | |
| 2859 AccessFlags promoted_flags; | |
| 2860 promoted_flags.set_flags(0); | |
| 2861 // These need to be oop pointers because they are allocated lazily | |
| 2862 // inside parse_methods inside a nested HandleMark | |
| 2863 objArrayOop methods_annotations_oop = NULL; | |
| 2864 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 2865 objArrayOop methods_default_annotations_oop = NULL; | |
| 2866 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 2867 &promoted_flags, | |
| 2868 &has_final_method, | |
| 2869 &methods_annotations_oop, | |
| 2870 &methods_parameter_annotations_oop, | |
| 2871 &methods_default_annotations_oop, | |
| 2872 CHECK_(nullHandle)); | |
| 2873 | |
| 2874 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 2875 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 2876 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 2877 | |
| 2878 // We check super class after class file is parsed and format is checked | |
|
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2879 if (super_class_index > 0 && super_klass.is_null()) { |
| 0 | 2880 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
| 2881 if (access_flags.is_interface()) { | |
| 2882 // Before attempting to resolve the superclass, check for class format | |
| 2883 // errors not checked yet. | |
| 2884 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
| 2885 "Interfaces must have java.lang.Object as superclass in class file %s", | |
| 2886 CHECK_(nullHandle)); | |
| 2887 } | |
| 2888 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 2889 sk, | |
| 2890 class_loader, | |
| 2891 protection_domain, | |
| 2892 true, | |
| 2893 CHECK_(nullHandle)); | |
|
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2894 |
| 0 | 2895 KlassHandle kh (THREAD, k); |
| 2896 super_klass = instanceKlassHandle(THREAD, kh()); | |
|
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2897 if (LinkWellKnownClasses) // my super class is well known to me |
|
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2898 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
|
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2899 } |
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2900 if (super_klass.not_null()) { |
| 0 | 2901 if (super_klass->is_interface()) { |
| 2902 ResourceMark rm(THREAD); | |
| 2903 Exceptions::fthrow( | |
| 2904 THREAD_AND_LOCATION, | |
| 2905 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
| 2906 "class %s has interface %s as super class", | |
| 2907 class_name->as_klass_external_name(), | |
| 2908 super_klass->external_name() | |
| 2909 ); | |
| 2910 return nullHandle; | |
| 2911 } | |
| 2912 // Make sure super class is not final | |
| 2913 if (super_klass->is_final()) { | |
| 2914 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 2915 } | |
| 2916 } | |
| 2917 | |
| 2918 // Compute the transitive list of all unique interfaces implemented by this class | |
| 2919 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 2920 | |
| 2921 // sort methods | |
| 2922 typeArrayHandle method_ordering = sort_methods(methods, | |
| 2923 methods_annotations, | |
| 2924 methods_parameter_annotations, | |
| 2925 methods_default_annotations, | |
| 2926 CHECK_(nullHandle)); | |
| 2927 | |
| 2928 // promote flags from parse_methods() to the klass' flags | |
| 2929 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 2930 | |
| 2931 // Size of Java vtable (in words) | |
| 2932 int vtable_size = 0; | |
| 2933 int itable_size = 0; | |
| 2934 int num_miranda_methods = 0; | |
| 2935 | |
| 2936 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 2937 num_miranda_methods, | |
| 2938 super_klass(), | |
| 2939 methods(), | |
| 2940 access_flags, | |
|
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|
2941 class_loader, |
|
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2942 class_name, |
|
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2943 local_interfaces(), |
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|
2944 CHECK_(nullHandle)); |
| 0 | 2945 |
| 2946 // Size of Java itable (in words) | |
| 2947 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 2948 | |
| 2949 // Field size and offset computation | |
| 2950 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 2951 #ifndef PRODUCT | |
| 2952 int orig_nonstatic_field_size = 0; | |
| 2953 #endif | |
| 2954 int static_field_size = 0; | |
| 2955 int next_static_oop_offset; | |
| 2956 int next_static_double_offset; | |
| 2957 int next_static_word_offset; | |
| 2958 int next_static_short_offset; | |
| 2959 int next_static_byte_offset; | |
| 2960 int next_static_type_offset; | |
| 2961 int next_nonstatic_oop_offset; | |
| 2962 int next_nonstatic_double_offset; | |
| 2963 int next_nonstatic_word_offset; | |
| 2964 int next_nonstatic_short_offset; | |
| 2965 int next_nonstatic_byte_offset; | |
| 2966 int next_nonstatic_type_offset; | |
| 2967 int first_nonstatic_oop_offset; | |
| 2968 int first_nonstatic_field_offset; | |
| 2969 int next_nonstatic_field_offset; | |
| 2970 | |
| 2971 // Calculate the starting byte offsets | |
| 2972 next_static_oop_offset = (instanceKlass::header_size() + | |
| 2973 align_object_offset(vtable_size) + | |
| 2974 align_object_offset(itable_size)) * wordSize; | |
| 2975 next_static_double_offset = next_static_oop_offset + | |
|
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|
2976 (fac.static_oop_count * heapOopSize); |
| 0 | 2977 if ( fac.static_double_count && |
| 2978 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 2979 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 2980 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 2981 } | |
| 2982 | |
| 2983 next_static_word_offset = next_static_double_offset + | |
| 2984 (fac.static_double_count * BytesPerLong); | |
| 2985 next_static_short_offset = next_static_word_offset + | |
| 2986 (fac.static_word_count * BytesPerInt); | |
| 2987 next_static_byte_offset = next_static_short_offset + | |
| 2988 (fac.static_short_count * BytesPerShort); | |
| 2989 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 2990 fac.static_byte_count ), wordSize ); | |
| 2991 static_field_size = (next_static_type_offset - | |
| 2992 next_static_oop_offset) / wordSize; | |
|
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2993 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2994 nonstatic_field_size * heapOopSize; |
| 0 | 2995 next_nonstatic_field_offset = first_nonstatic_field_offset; |
| 2996 | |
| 2997 // Add fake fields for java.lang.Class instances (also see below) | |
| 2998 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2999 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
| 3000 } | |
| 3001 | |
| 710 | 3002 // adjust the vmentry field declaration in java.dyn.MethodHandle |
| 3003 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { | |
| 3004 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle)); | |
| 3005 } | |
| 3006 | |
| 0 | 3007 // Add a fake "discovered" field if it is not present |
| 3008 // for compatibility with earlier jdk's. | |
| 3009 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
| 3010 && class_loader.is_null()) { | |
| 3011 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 3012 } | |
| 3013 // end of "discovered" field compactibility fix | |
| 3014 | |
|
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|
3015 unsigned int nonstatic_double_count = fac.nonstatic_double_count; |
|
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3016 unsigned int nonstatic_word_count = fac.nonstatic_word_count; |
|
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3017 unsigned int nonstatic_short_count = fac.nonstatic_short_count; |
|
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3018 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count; |
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3019 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count; |
| 0 | 3020 |
|
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3021 bool super_has_nonstatic_fields = |
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3022 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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3023 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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3024 ((nonstatic_double_count + nonstatic_word_count + |
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3025 nonstatic_short_count + nonstatic_byte_count + |
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3026 nonstatic_oop_count) != 0); |
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3027 |
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|
3028 |
|
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|
3029 // Prepare list of oops for oop map generation. |
|
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|
3030 int* nonstatic_oop_offsets; |
|
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|
3031 unsigned int* nonstatic_oop_counts; |
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|
3032 unsigned int nonstatic_oop_map_count = 0; |
| 0 | 3033 |
| 3034 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
|
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|
3035 THREAD, int, nonstatic_oop_count + 1); |
| 938 | 3036 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( |
|
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|
3037 THREAD, unsigned int, nonstatic_oop_count + 1); |
| 0 | 3038 |
| 3039 // Add fake fields for java.lang.Class instances (also see above). | |
| 3040 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
| 3041 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 3042 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
|
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|
3043 nonstatic_oop_offsets[0] = first_nonstatic_field_offset; |
|
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|
3044 const uint fake_oop_count = (next_nonstatic_field_offset - |
|
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|
3045 first_nonstatic_field_offset) / heapOopSize; |
|
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|
3046 nonstatic_oop_counts[0] = fake_oop_count; |
|
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|
3047 nonstatic_oop_map_count = 1; |
|
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|
3048 nonstatic_oop_count -= fake_oop_count; |
| 0 | 3049 first_nonstatic_oop_offset = first_nonstatic_field_offset; |
| 3050 } else { | |
| 3051 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 3052 } | |
| 3053 | |
| 3054 #ifndef PRODUCT | |
| 3055 if( PrintCompactFieldsSavings ) { | |
| 3056 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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3057 (nonstatic_oop_count * heapOopSize); |
| 0 | 3058 if ( nonstatic_double_count > 0 ) { |
| 3059 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 3060 } | |
| 3061 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3062 (nonstatic_double_count * BytesPerLong); | |
| 3063 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3064 (nonstatic_word_count * BytesPerInt); | |
| 3065 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3066 (nonstatic_short_count * BytesPerShort); | |
| 3067 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
|
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3068 nonstatic_byte_count ), heapOopSize ); |
| 0 | 3069 orig_nonstatic_field_size = nonstatic_field_size + |
|
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3070 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3071 } |
| 3072 #endif | |
| 3073 bool compact_fields = CompactFields; | |
| 3074 int allocation_style = FieldsAllocationStyle; | |
|
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3075 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? |
|
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3076 assert(false, "0 <= FieldsAllocationStyle <= 2"); |
| 0 | 3077 allocation_style = 1; // Optimistic |
| 3078 } | |
| 3079 | |
| 3080 // The next classes have predefined hard-coded fields offsets | |
| 3081 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 3082 // Use default fields allocation order for them. | |
| 3083 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
| 3084 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
| 3085 class_name() == vmSymbols::java_lang_Class() || | |
| 3086 class_name() == vmSymbols::java_lang_ClassLoader() || | |
| 3087 class_name() == vmSymbols::java_lang_ref_Reference() || | |
| 3088 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
| 3089 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
| 3090 class_name() == vmSymbols::java_lang_String() || | |
|
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3091 class_name() == vmSymbols::java_lang_Throwable() || |
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3092 class_name() == vmSymbols::java_lang_Boolean() || |
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3093 class_name() == vmSymbols::java_lang_Character() || |
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3094 class_name() == vmSymbols::java_lang_Float() || |
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3095 class_name() == vmSymbols::java_lang_Double() || |
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3096 class_name() == vmSymbols::java_lang_Byte() || |
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3097 class_name() == vmSymbols::java_lang_Short() || |
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3098 class_name() == vmSymbols::java_lang_Integer() || |
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3099 class_name() == vmSymbols::java_lang_Long())) { |
| 0 | 3100 allocation_style = 0; // Allocate oops first |
| 3101 compact_fields = false; // Don't compact fields | |
| 3102 } | |
| 3103 | |
| 3104 if( allocation_style == 0 ) { | |
| 3105 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 3106 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 3107 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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3108 (nonstatic_oop_count * heapOopSize); |
| 0 | 3109 } else if( allocation_style == 1 ) { |
| 3110 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 3111 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
|
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3112 } else if( allocation_style == 2 ) { |
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3113 // Fields allocation: oops fields in super and sub classes are together. |
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3114 if( nonstatic_field_size > 0 && super_klass() != NULL && |
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3115 super_klass->nonstatic_oop_map_size() > 0 ) { |
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3116 int map_size = super_klass->nonstatic_oop_map_size(); |
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3117 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); |
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3118 OopMapBlock* last_map = first_map + map_size - 1; |
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3119 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); |
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3120 if (next_offset == next_nonstatic_field_offset) { |
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3121 allocation_style = 0; // allocate oops first |
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3122 next_nonstatic_oop_offset = next_nonstatic_field_offset; |
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3123 next_nonstatic_double_offset = next_nonstatic_oop_offset + |
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3124 (nonstatic_oop_count * heapOopSize); |
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3125 } |
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3126 } |
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3127 if( allocation_style == 2 ) { |
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3128 allocation_style = 1; // allocate oops last |
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3129 next_nonstatic_double_offset = next_nonstatic_field_offset; |
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3130 } |
| 0 | 3131 } else { |
| 3132 ShouldNotReachHere(); | |
| 3133 } | |
| 3134 | |
| 3135 int nonstatic_oop_space_count = 0; | |
| 3136 int nonstatic_word_space_count = 0; | |
| 3137 int nonstatic_short_space_count = 0; | |
| 3138 int nonstatic_byte_space_count = 0; | |
| 3139 int nonstatic_oop_space_offset; | |
| 3140 int nonstatic_word_space_offset; | |
| 3141 int nonstatic_short_space_offset; | |
| 3142 int nonstatic_byte_space_offset; | |
| 3143 | |
|
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3144 if( nonstatic_double_count > 0 ) { |
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3145 int offset = next_nonstatic_double_offset; |
| 0 | 3146 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 3147 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 3148 // Allocate available fields into the gap before double field. | |
| 3149 int length = next_nonstatic_double_offset - offset; | |
| 3150 assert(length == BytesPerInt, ""); | |
| 3151 nonstatic_word_space_offset = offset; | |
| 3152 if( nonstatic_word_count > 0 ) { | |
| 3153 nonstatic_word_count -= 1; | |
| 3154 nonstatic_word_space_count = 1; // Only one will fit | |
| 3155 length -= BytesPerInt; | |
| 3156 offset += BytesPerInt; | |
| 3157 } | |
| 3158 nonstatic_short_space_offset = offset; | |
| 3159 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 3160 nonstatic_short_count -= 1; | |
| 3161 nonstatic_short_space_count += 1; | |
| 3162 length -= BytesPerShort; | |
| 3163 offset += BytesPerShort; | |
| 3164 } | |
| 3165 nonstatic_byte_space_offset = offset; | |
| 3166 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 3167 nonstatic_byte_count -= 1; | |
| 3168 nonstatic_byte_space_count += 1; | |
| 3169 length -= 1; | |
| 3170 } | |
| 3171 // Allocate oop field in the gap if there are no other fields for that. | |
| 3172 nonstatic_oop_space_offset = offset; | |
|
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3173 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
| 0 | 3174 allocation_style != 0 ) { // when oop fields not first |
| 3175 nonstatic_oop_count -= 1; | |
| 3176 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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3177 length -= heapOopSize; |
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3178 offset += heapOopSize; |
| 0 | 3179 } |
| 3180 } | |
| 3181 } | |
| 3182 | |
| 3183 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3184 (nonstatic_double_count * BytesPerLong); | |
| 3185 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3186 (nonstatic_word_count * BytesPerInt); | |
| 3187 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3188 (nonstatic_short_count * BytesPerShort); | |
| 3189 | |
| 3190 int notaligned_offset; | |
| 3191 if( allocation_style == 0 ) { | |
| 3192 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3193 } else { // allocation_style == 1 | |
| 3194 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3195 if( nonstatic_oop_count > 0 ) { | |
|
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3196 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 3197 } |
|
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3198 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 3199 } |
|
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3200 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
| 0 | 3201 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
|
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3202 - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3203 |
| 3204 // Iterate over fields again and compute correct offsets. | |
| 3205 // The field allocation type was temporarily stored in the offset slot. | |
| 3206 // oop fields are located before non-oop fields (static and non-static). | |
| 3207 int len = fields->length(); | |
| 3208 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 3209 int real_offset; | |
| 1108 | 3210 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
| 0 | 3211 switch (atype) { |
| 3212 case STATIC_OOP: | |
| 3213 real_offset = next_static_oop_offset; | |
|
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3214 next_static_oop_offset += heapOopSize; |
| 0 | 3215 break; |
| 3216 case STATIC_BYTE: | |
| 3217 real_offset = next_static_byte_offset; | |
| 3218 next_static_byte_offset += 1; | |
| 3219 break; | |
| 3220 case STATIC_SHORT: | |
| 3221 real_offset = next_static_short_offset; | |
| 3222 next_static_short_offset += BytesPerShort; | |
| 3223 break; | |
| 3224 case STATIC_WORD: | |
| 3225 real_offset = next_static_word_offset; | |
| 3226 next_static_word_offset += BytesPerInt; | |
| 3227 break; | |
| 3228 case STATIC_ALIGNED_DOUBLE: | |
| 3229 case STATIC_DOUBLE: | |
| 3230 real_offset = next_static_double_offset; | |
| 3231 next_static_double_offset += BytesPerLong; | |
| 3232 break; | |
| 3233 case NONSTATIC_OOP: | |
| 3234 if( nonstatic_oop_space_count > 0 ) { | |
| 3235 real_offset = nonstatic_oop_space_offset; | |
|
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3236 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 3237 nonstatic_oop_space_count -= 1; |
| 3238 } else { | |
| 3239 real_offset = next_nonstatic_oop_offset; | |
|
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3240 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 3241 } |
| 3242 // Update oop maps | |
| 3243 if( nonstatic_oop_map_count > 0 && | |
| 3244 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
|
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3245 real_offset - |
|
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3246 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * |
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3247 heapOopSize ) { |
| 0 | 3248 // Extend current oop map |
| 938 | 3249 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; |
| 0 | 3250 } else { |
| 3251 // Create new oop map | |
|
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3252 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; |
| 938 | 3253 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; |
| 0 | 3254 nonstatic_oop_map_count += 1; |
| 3255 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 3256 first_nonstatic_oop_offset = real_offset; | |
| 3257 } | |
| 3258 } | |
| 3259 break; | |
| 3260 case NONSTATIC_BYTE: | |
| 3261 if( nonstatic_byte_space_count > 0 ) { | |
| 3262 real_offset = nonstatic_byte_space_offset; | |
| 3263 nonstatic_byte_space_offset += 1; | |
| 3264 nonstatic_byte_space_count -= 1; | |
| 3265 } else { | |
| 3266 real_offset = next_nonstatic_byte_offset; | |
| 3267 next_nonstatic_byte_offset += 1; | |
| 3268 } | |
| 3269 break; | |
| 3270 case NONSTATIC_SHORT: | |
| 3271 if( nonstatic_short_space_count > 0 ) { | |
| 3272 real_offset = nonstatic_short_space_offset; | |
| 3273 nonstatic_short_space_offset += BytesPerShort; | |
| 3274 nonstatic_short_space_count -= 1; | |
| 3275 } else { | |
| 3276 real_offset = next_nonstatic_short_offset; | |
| 3277 next_nonstatic_short_offset += BytesPerShort; | |
| 3278 } | |
| 3279 break; | |
| 3280 case NONSTATIC_WORD: | |
| 3281 if( nonstatic_word_space_count > 0 ) { | |
| 3282 real_offset = nonstatic_word_space_offset; | |
| 3283 nonstatic_word_space_offset += BytesPerInt; | |
| 3284 nonstatic_word_space_count -= 1; | |
| 3285 } else { | |
| 3286 real_offset = next_nonstatic_word_offset; | |
| 3287 next_nonstatic_word_offset += BytesPerInt; | |
| 3288 } | |
| 3289 break; | |
| 3290 case NONSTATIC_ALIGNED_DOUBLE: | |
| 3291 case NONSTATIC_DOUBLE: | |
| 3292 real_offset = next_nonstatic_double_offset; | |
| 3293 next_nonstatic_double_offset += BytesPerLong; | |
| 3294 break; | |
| 3295 default: | |
| 3296 ShouldNotReachHere(); | |
| 3297 } | |
| 1108 | 3298 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); |
| 3299 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); | |
| 0 | 3300 } |
| 3301 | |
| 3302 // Size of instances | |
| 3303 int instance_size; | |
| 3304 | |
|
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3305 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
| 0 | 3306 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
| 3307 | |
|
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3308 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value"); |
| 0 | 3309 |
| 938 | 3310 // Number of non-static oop map blocks allocated at end of klass. |
|
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3311 const unsigned int total_oop_map_count = |
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3312 compute_oop_map_count(super_klass, nonstatic_oop_map_count, |
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3313 first_nonstatic_oop_offset); |
| 0 | 3314 |
| 3315 // Compute reference type | |
| 3316 ReferenceType rt; | |
| 3317 if (super_klass() == NULL) { | |
| 3318 rt = REF_NONE; | |
| 3319 } else { | |
| 3320 rt = super_klass->reference_type(); | |
| 3321 } | |
| 3322 | |
| 3323 // We can now create the basic klassOop for this klass | |
|
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3324 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size, |
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3325 static_field_size, |
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3326 total_oop_map_count, |
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|
3327 rt, CHECK_(nullHandle)); |
| 0 | 3328 instanceKlassHandle this_klass (THREAD, ik); |
| 3329 | |
| 938 | 3330 assert(this_klass->static_field_size() == static_field_size, "sanity"); |
| 3331 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, | |
| 3332 "sanity"); | |
| 0 | 3333 |
| 3334 // Fill in information already parsed | |
| 3335 this_klass->set_access_flags(access_flags); | |
| 975 | 3336 this_klass->set_should_verify_class(verify); |
| 0 | 3337 jint lh = Klass::instance_layout_helper(instance_size, false); |
| 3338 this_klass->set_layout_helper(lh); | |
| 3339 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 3340 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 3341 // Not yet: supers are done below to support the new subtype-checking fields | |
| 3342 //this_klass->set_super(super_klass()); | |
| 3343 this_klass->set_class_loader(class_loader()); | |
| 3344 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
| 975 | 3345 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
| 0 | 3346 this_klass->set_static_oop_field_size(fac.static_oop_count); |
| 3347 cp->set_pool_holder(this_klass()); | |
| 3348 this_klass->set_constants(cp()); | |
| 3349 this_klass->set_local_interfaces(local_interfaces()); | |
| 3350 this_klass->set_fields(fields()); | |
| 3351 this_klass->set_methods(methods()); | |
| 3352 if (has_final_method) { | |
| 3353 this_klass->set_has_final_method(); | |
| 3354 } | |
| 3355 this_klass->set_method_ordering(method_ordering()); | |
|
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3356 // The instanceKlass::_methods_jmethod_ids cache and the |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3357 // instanceKlass::_methods_cached_itable_indices cache are |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3358 // both managed on the assumption that the initial cache |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3359 // size is equal to the number of methods in the class. If |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3360 // that changes, then instanceKlass::idnum_can_increment() |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
975
diff
changeset
|
3361 // has to be changed accordingly. |
| 0 | 3362 this_klass->set_initial_method_idnum(methods->length()); |
| 3363 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 710 | 3364 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
|
474
7a018855d2f0
6779339: turn off LinkWellKnownClasses by default pending further testing
jrose
parents:
431
diff
changeset
|
3365 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
| 0 | 3366 this_klass->set_protection_domain(protection_domain()); |
| 3367 this_klass->set_fields_annotations(fields_annotations()); | |
| 3368 this_klass->set_methods_annotations(methods_annotations()); | |
| 3369 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3370 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3371 | |
| 3372 this_klass->set_minor_version(minor_version); | |
| 3373 this_klass->set_major_version(major_version); | |
| 3374 | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3375 // Set up methodOop::intrinsic_id as soon as we know the names of methods. |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3376 // (We used to do this lazily, but now we query it in Rewriter, |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3377 // which is eagerly done for every method, so we might as well do it now, |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3378 // when everything is fresh in memory.) |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3379 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3380 for (int j = 0; j < methods->length(); j++) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3381 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3382 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3383 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3384 |
| 0 | 3385 if (cached_class_file_bytes != NULL) { |
| 3386 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3387 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3388 cached_class_file_length); | |
| 3389 } | |
| 3390 | |
| 3391 // Miranda methods | |
| 3392 if ((num_miranda_methods > 0) || | |
| 3393 // if this class introduced new miranda methods or | |
| 3394 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3395 // super class exists and this class inherited miranda methods | |
| 3396 ) { | |
| 3397 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3398 } | |
| 3399 | |
| 3400 // Additional attributes | |
| 3401 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3402 | |
| 3403 // Make sure this is the end of class file stream | |
| 3404 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3405 | |
| 3406 // Initialize static fields | |
| 3407 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3408 | |
| 3409 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3410 // Compute transitive closure of interfaces this class implements | |
| 3411 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3412 | |
| 3413 // Fill in information needed to compute superclasses. | |
| 3414 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3415 | |
| 3416 // Initialize itable offset tables | |
| 3417 klassItable::setup_itable_offset_table(this_klass); | |
| 3418 | |
| 3419 // Do final class setup | |
| 938 | 3420 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); |
| 0 | 3421 |
| 3422 set_precomputed_flags(this_klass); | |
| 3423 | |
| 3424 // reinitialize modifiers, using the InnerClasses attribute | |
| 3425 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3426 this_klass->set_modifier_flags(computed_modifiers); | |
| 3427 | |
| 3428 // check if this class can access its super class | |
| 3429 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3430 | |
| 3431 // check if this class can access its superinterfaces | |
| 3432 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3433 | |
| 3434 // check if this class overrides any final method | |
| 3435 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3436 | |
| 3437 // check that if this class is an interface then it doesn't have static methods | |
| 3438 if (this_klass->is_interface()) { | |
| 3439 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3440 } | |
| 3441 | |
| 3442 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3443 false /* not shared class */); | |
| 3444 | |
| 3445 if (TraceClassLoading) { | |
| 3446 // print in a single call to reduce interleaving of output | |
| 3447 if (cfs->source() != NULL) { | |
| 3448 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3449 cfs->source()); | |
| 3450 } else if (class_loader.is_null()) { | |
| 3451 if (THREAD->is_Java_thread()) { | |
| 3452 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3453 tty->print("[Loaded %s by instance of %s]\n", | |
| 3454 this_klass->external_name(), | |
| 3455 instanceKlass::cast(caller)->external_name()); | |
| 3456 } else { | |
| 3457 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3458 } | |
| 3459 } else { | |
| 3460 ResourceMark rm; | |
| 3461 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3462 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3463 } | |
| 3464 } | |
| 3465 | |
| 3466 if (TraceClassResolution) { | |
| 3467 // print out the superclass. | |
| 3468 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3469 if (this_klass->java_super() != NULL) { | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3470 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
| 0 | 3471 } |
| 3472 // print out each of the interface classes referred to by this class. | |
| 3473 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3474 if (!local_interfaces.is_null()) { | |
| 3475 int length = local_interfaces->length(); | |
| 3476 for (int i = 0; i < length; i++) { | |
| 3477 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3478 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3479 const char * to = to_class->external_name(); | |
|
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3480 tty->print("RESOLVE %s %s (interface)\n", from, to); |
| 0 | 3481 } |
| 3482 } | |
| 3483 } | |
| 3484 | |
| 3485 #ifndef PRODUCT | |
| 3486 if( PrintCompactFieldsSavings ) { | |
| 3487 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
|
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3488 tty->print("[Saved %d of %d bytes in %s]\n", |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3489 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3490 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3491 this_klass->external_name()); |
| 0 | 3492 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
|
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3493 tty->print("[Wasted %d over %d bytes in %s]\n", |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3494 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3495 orig_nonstatic_field_size*heapOopSize, |
|
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3496 this_klass->external_name()); |
| 0 | 3497 } |
| 3498 } | |
| 3499 #endif | |
| 3500 | |
| 3501 // preserve result across HandleMark | |
| 3502 preserve_this_klass = this_klass(); | |
| 3503 } | |
| 3504 | |
| 3505 // Create new handle outside HandleMark | |
| 3506 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3507 debug_only(this_klass->as_klassOop()->verify();) | |
| 3508 | |
| 3509 return this_klass; | |
| 3510 } | |
| 3511 | |
| 3512 | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3513 unsigned int |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3514 ClassFileParser::compute_oop_map_count(instanceKlassHandle super, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3515 unsigned int nonstatic_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3516 int first_nonstatic_oop_offset) { |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3517 unsigned int map_count = |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3518 super.is_null() ? 0 : super->nonstatic_oop_map_count(); |
| 0 | 3519 if (nonstatic_oop_map_count > 0) { |
| 3520 // We have oops to add to map | |
| 938 | 3521 if (map_count == 0) { |
| 3522 map_count = nonstatic_oop_map_count; | |
| 0 | 3523 } else { |
| 938 | 3524 // Check whether we should add a new map block or whether the last one can |
| 3525 // be extended | |
| 3526 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); | |
| 3527 OopMapBlock* const last_map = first_map + map_count - 1; | |
| 3528 | |
| 3529 int next_offset = last_map->offset() + last_map->count() * heapOopSize; | |
| 0 | 3530 if (next_offset == first_nonstatic_oop_offset) { |
| 3531 // There is no gap bettwen superklass's last oop field and first | |
| 3532 // local oop field, merge maps. | |
| 3533 nonstatic_oop_map_count -= 1; | |
| 3534 } else { | |
| 3535 // Superklass didn't end with a oop field, add extra maps | |
| 938 | 3536 assert(next_offset < first_nonstatic_oop_offset, "just checking"); |
| 0 | 3537 } |
| 938 | 3538 map_count += nonstatic_oop_map_count; |
| 0 | 3539 } |
| 3540 } | |
| 938 | 3541 return map_count; |
| 0 | 3542 } |
| 3543 | |
| 3544 | |
| 3545 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3546 unsigned int nonstatic_oop_map_count, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3547 int* nonstatic_oop_offsets, |
|
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3548 unsigned int* nonstatic_oop_counts) { |
| 0 | 3549 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); |
| 938 | 3550 const instanceKlass* const super = k->superklass(); |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3551 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; |
| 938 | 3552 if (super_count > 0) { |
| 3553 // Copy maps from superklass | |
| 0 | 3554 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); |
|
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3555 for (unsigned int i = 0; i < super_count; ++i) { |
| 0 | 3556 *this_oop_map++ = *super_oop_map++; |
| 3557 } | |
| 3558 } | |
| 938 | 3559 |
| 0 | 3560 if (nonstatic_oop_map_count > 0) { |
| 938 | 3561 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { |
| 3562 // The counts differ because there is no gap between superklass's last oop | |
| 3563 // field and the first local oop field. Extend the last oop map copied | |
| 0 | 3564 // from the superklass instead of creating new one. |
| 3565 nonstatic_oop_map_count--; | |
| 3566 nonstatic_oop_offsets++; | |
| 3567 this_oop_map--; | |
| 938 | 3568 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); |
| 0 | 3569 this_oop_map++; |
| 3570 } | |
| 938 | 3571 |
| 0 | 3572 // Add new map blocks, fill them |
| 3573 while (nonstatic_oop_map_count-- > 0) { | |
| 3574 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 938 | 3575 this_oop_map->set_count(*nonstatic_oop_counts++); |
| 0 | 3576 this_oop_map++; |
| 3577 } | |
| 938 | 3578 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == |
| 3579 this_oop_map, "sanity"); | |
| 0 | 3580 } |
| 3581 } | |
| 3582 | |
| 3583 | |
| 3584 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3585 klassOop super = k->super(); | |
| 3586 | |
| 3587 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3588 // in which case we don't have to register objects as finalizable | |
| 3589 if (!_has_empty_finalizer) { | |
| 3590 if (_has_finalizer || | |
| 3591 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3592 k->set_has_finalizer(); | |
| 3593 } | |
| 3594 } | |
| 3595 | |
| 3596 #ifdef ASSERT | |
| 3597 bool f = false; | |
| 3598 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3599 vmSymbols::void_method_signature()); | |
| 3600 if (m != NULL && !m->is_empty_method()) { | |
| 3601 f = true; | |
| 3602 } | |
| 3603 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3604 #endif | |
| 3605 | |
| 3606 // Check if this klass supports the java.lang.Cloneable interface | |
| 1142 | 3607 if (SystemDictionary::Cloneable_klass_loaded()) { |
| 3608 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { | |
| 0 | 3609 k->set_is_cloneable(); |
| 3610 } | |
| 3611 } | |
| 3612 | |
| 3613 // Check if this klass has a vanilla default constructor | |
| 3614 if (super == NULL) { | |
| 3615 // java.lang.Object has empty default constructor | |
| 3616 k->set_has_vanilla_constructor(); | |
| 3617 } else { | |
| 3618 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3619 _has_vanilla_constructor) { | |
| 3620 k->set_has_vanilla_constructor(); | |
| 3621 } | |
| 3622 #ifdef ASSERT | |
| 3623 bool v = false; | |
| 3624 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3625 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3626 ), vmSymbols::void_method_signature()); | |
| 3627 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3628 v = true; | |
| 3629 } | |
| 3630 } | |
| 3631 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3632 #endif | |
| 3633 } | |
| 3634 | |
| 3635 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3636 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3637 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3638 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3639 || k->is_abstract() || k->is_interface() | |
| 3640 || (k->name() == vmSymbols::java_lang_Class() | |
| 3641 && k->class_loader() == NULL) | |
| 3642 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3643 // Forbid fast-path allocation. | |
| 3644 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3645 k->set_layout_helper(lh); | |
| 3646 } | |
| 3647 } | |
| 3648 | |
| 3649 | |
| 3650 // utility method for appending and array with check for duplicates | |
| 3651 | |
| 3652 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3653 // iterate over new interfaces | |
| 3654 for (int i = 0; i < ifs->length(); i++) { | |
| 3655 oop e = ifs->obj_at(i); | |
| 3656 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3657 // check for duplicates | |
| 3658 bool duplicate = false; | |
| 3659 for (int j = 0; j < index; j++) { | |
| 3660 if (result->obj_at(j) == e) { | |
| 3661 duplicate = true; | |
| 3662 break; | |
| 3663 } | |
| 3664 } | |
| 3665 // add new interface | |
| 3666 if (!duplicate) { | |
| 3667 result->obj_at_put(index++, e); | |
| 3668 } | |
| 3669 } | |
| 3670 } | |
| 3671 | |
| 3672 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3673 // Compute maximum size for transitive interfaces | |
| 3674 int max_transitive_size = 0; | |
| 3675 int super_size = 0; | |
| 3676 // Add superclass transitive interfaces size | |
| 3677 if (super.not_null()) { | |
| 3678 super_size = super->transitive_interfaces()->length(); | |
| 3679 max_transitive_size += super_size; | |
| 3680 } | |
| 3681 // Add local interfaces' super interfaces | |
| 3682 int local_size = local_ifs->length(); | |
| 3683 for (int i = 0; i < local_size; i++) { | |
| 3684 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3685 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3686 } | |
| 3687 // Finally add local interfaces | |
| 3688 max_transitive_size += local_size; | |
| 3689 // Construct array | |
| 3690 objArrayHandle result; | |
| 3691 if (max_transitive_size == 0) { | |
| 3692 // no interfaces, use canonicalized array | |
| 3693 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3694 } else if (max_transitive_size == super_size) { | |
| 3695 // no new local interfaces added, share superklass' transitive interface array | |
| 3696 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3697 } else if (max_transitive_size == local_size) { | |
| 3698 // only local interfaces added, share local interface array | |
| 3699 result = local_ifs; | |
| 3700 } else { | |
| 3701 objArrayHandle nullHandle; | |
| 3702 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3703 result = objArrayHandle(THREAD, new_objarray); | |
| 3704 int index = 0; | |
| 3705 // Copy down from superclass | |
| 3706 if (super.not_null()) { | |
| 3707 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3708 } | |
| 3709 // Copy down from local interfaces' superinterfaces | |
| 3710 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3711 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3712 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3713 } | |
| 3714 // Finally add local interfaces | |
| 3715 append_interfaces(result, index, local_ifs()); | |
| 3716 | |
| 3717 // Check if duplicates were removed | |
| 3718 if (index != max_transitive_size) { | |
| 3719 assert(index < max_transitive_size, "just checking"); | |
| 3720 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3721 for (int i = 0; i < index; i++) { | |
| 3722 oop e = result->obj_at(i); | |
| 3723 assert(e != NULL, "just checking"); | |
| 3724 new_result->obj_at_put(i, e); | |
| 3725 } | |
| 3726 result = objArrayHandle(THREAD, new_result); | |
| 3727 } | |
| 3728 } | |
| 3729 return result; | |
| 3730 } | |
| 3731 | |
| 3732 | |
| 3733 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3734 klassOop super = this_klass->super(); | |
| 3735 if ((super != NULL) && | |
| 3736 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3737 ResourceMark rm(THREAD); | |
| 3738 Exceptions::fthrow( | |
| 3739 THREAD_AND_LOCATION, | |
| 3740 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3741 "class %s cannot access its superclass %s", | |
| 3742 this_klass->external_name(), | |
| 3743 instanceKlass::cast(super)->external_name() | |
| 3744 ); | |
| 3745 return; | |
| 3746 } | |
| 3747 } | |
| 3748 | |
| 3749 | |
| 3750 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3751 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3752 int lng = local_interfaces->length(); | |
| 3753 for (int i = lng - 1; i >= 0; i--) { | |
| 3754 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3755 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3756 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3757 ResourceMark rm(THREAD); | |
| 3758 Exceptions::fthrow( | |
| 3759 THREAD_AND_LOCATION, | |
| 3760 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3761 "class %s cannot access its superinterface %s", | |
| 3762 this_klass->external_name(), | |
| 3763 instanceKlass::cast(k)->external_name() | |
| 3764 ); | |
| 3765 return; | |
| 3766 } | |
| 3767 } | |
| 3768 } | |
| 3769 | |
| 3770 | |
| 3771 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3772 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3773 int num_methods = methods->length(); | |
| 3774 | |
| 3775 // go thru each method and check if it overrides a final method | |
| 3776 for (int index = 0; index < num_methods; index++) { | |
| 3777 methodOop m = (methodOop)methods->obj_at(index); | |
| 3778 | |
| 3779 // skip private, static and <init> methods | |
| 3780 if ((!m->is_private()) && | |
| 3781 (!m->is_static()) && | |
| 3782 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3783 | |
| 3784 symbolOop name = m->name(); | |
| 3785 symbolOop signature = m->signature(); | |
| 3786 klassOop k = this_klass->super(); | |
| 3787 methodOop super_m = NULL; | |
| 3788 while (k != NULL) { | |
| 3789 // skip supers that don't have final methods. | |
| 3790 if (k->klass_part()->has_final_method()) { | |
| 3791 // lookup a matching method in the super class hierarchy | |
| 3792 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3793 if (super_m == NULL) { | |
| 3794 break; // didn't find any match; get out | |
| 3795 } | |
| 3796 | |
| 3797 if (super_m->is_final() && | |
| 3798 // matching method in super is final | |
| 3799 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 3800 super_m->method_holder(), | |
| 3801 super_m->method_holder(), | |
| 3802 super_m->access_flags(), false)) | |
| 3803 // this class can access super final method and therefore override | |
| 3804 ) { | |
| 3805 ResourceMark rm(THREAD); | |
| 3806 Exceptions::fthrow( | |
| 3807 THREAD_AND_LOCATION, | |
| 3808 vmSymbolHandles::java_lang_VerifyError(), | |
| 3809 "class %s overrides final method %s.%s", | |
| 3810 this_klass->external_name(), | |
| 3811 name->as_C_string(), | |
| 3812 signature->as_C_string() | |
| 3813 ); | |
| 3814 return; | |
| 3815 } | |
| 3816 | |
| 3817 // continue to look from super_m's holder's super. | |
| 3818 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 3819 continue; | |
| 3820 } | |
| 3821 | |
| 3822 k = k->klass_part()->super(); | |
| 3823 } | |
| 3824 } | |
| 3825 } | |
| 3826 } | |
| 3827 | |
| 3828 | |
| 3829 // assumes that this_klass is an interface | |
| 3830 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 3831 assert(this_klass->is_interface(), "not an interface"); | |
| 3832 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3833 int num_methods = methods->length(); | |
| 3834 | |
| 3835 for (int index = 0; index < num_methods; index++) { | |
| 3836 methodOop m = (methodOop)methods->obj_at(index); | |
| 3837 // if m is static and not the init method, throw a verify error | |
| 3838 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 3839 ResourceMark rm(THREAD); | |
| 3840 Exceptions::fthrow( | |
| 3841 THREAD_AND_LOCATION, | |
| 3842 vmSymbolHandles::java_lang_VerifyError(), | |
| 3843 "Illegal static method %s in interface %s", | |
| 3844 m->name()->as_C_string(), | |
| 3845 this_klass->external_name() | |
| 3846 ); | |
| 3847 return; | |
| 3848 } | |
| 3849 } | |
| 3850 } | |
| 3851 | |
| 3852 // utility methods for format checking | |
| 3853 | |
| 3854 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 3855 if (!_need_verify) { return; } | |
| 3856 | |
| 3857 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 3858 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3859 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3860 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 3861 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3862 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 3863 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3864 | |
| 3865 if ((is_abstract && is_final) || | |
| 3866 (is_interface && !is_abstract) || | |
| 3867 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 3868 (!is_interface && major_gte_15 && is_annotation)) { | |
| 3869 ResourceMark rm(THREAD); | |
| 3870 Exceptions::fthrow( | |
| 3871 THREAD_AND_LOCATION, | |
| 3872 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3873 "Illegal class modifiers in class %s: 0x%X", | |
| 3874 _class_name->as_C_string(), flags | |
| 3875 ); | |
| 3876 return; | |
| 3877 } | |
| 3878 } | |
| 3879 | |
| 3880 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 3881 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3882 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3883 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3884 | |
| 3885 return ((is_public && is_protected) || | |
| 3886 (is_public && is_private) || | |
| 3887 (is_protected && is_private)); | |
| 3888 } | |
| 3889 | |
| 3890 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
1124
2e8bdfdd3ba2
6899467: System property java.class.version out-of-sync with VM for jdk 5.0 with HS 16 in nightly build
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parents:
977
diff
changeset
|
3891 u2 max_version = |
|
2e8bdfdd3ba2
6899467: System property java.class.version out-of-sync with VM for jdk 5.0 with HS 16 in nightly build
xlu
parents:
977
diff
changeset
|
3892 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : |
|
2e8bdfdd3ba2
6899467: System property java.class.version out-of-sync with VM for jdk 5.0 with HS 16 in nightly build
xlu
parents:
977
diff
changeset
|
3893 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); |
| 0 | 3894 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
176
6b648fefb395
6705523: Fix for 6695506 will violate spec when used in JDK6
kamg
parents:
136
diff
changeset
|
3895 (major <= max_version) && |
|
6b648fefb395
6705523: Fix for 6695506 will violate spec when used in JDK6
kamg
parents:
136
diff
changeset
|
3896 ((major != max_version) || |
| 0 | 3897 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 3898 } | |
| 3899 | |
| 3900 void ClassFileParser::verify_legal_field_modifiers( | |
| 3901 jint flags, bool is_interface, TRAPS) { | |
| 3902 if (!_need_verify) { return; } | |
| 3903 | |
| 3904 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3905 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3906 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3907 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3908 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3909 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 3910 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 3911 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3912 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3913 | |
| 3914 bool is_illegal = false; | |
| 3915 | |
| 3916 if (is_interface) { | |
| 3917 if (!is_public || !is_static || !is_final || is_private || | |
| 3918 is_protected || is_volatile || is_transient || | |
| 3919 (major_gte_15 && is_enum)) { | |
| 3920 is_illegal = true; | |
| 3921 } | |
| 3922 } else { // not interface | |
| 3923 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 3924 is_illegal = true; | |
| 3925 } | |
| 3926 } | |
| 3927 | |
| 3928 if (is_illegal) { | |
| 3929 ResourceMark rm(THREAD); | |
| 3930 Exceptions::fthrow( | |
| 3931 THREAD_AND_LOCATION, | |
| 3932 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3933 "Illegal field modifiers in class %s: 0x%X", | |
| 3934 _class_name->as_C_string(), flags); | |
| 3935 return; | |
| 3936 } | |
| 3937 } | |
| 3938 | |
| 3939 void ClassFileParser::verify_legal_method_modifiers( | |
| 3940 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
| 3941 if (!_need_verify) { return; } | |
| 3942 | |
| 3943 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3944 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3945 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3946 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3947 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 3948 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3949 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 3950 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 3951 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 3952 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3953 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 3954 | |
| 3955 bool is_illegal = false; | |
| 3956 | |
| 3957 if (is_interface) { | |
| 3958 if (!is_abstract || !is_public || is_static || is_final || | |
| 3959 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 3960 is_illegal = true; | |
| 3961 } | |
| 3962 } else { // not interface | |
| 3963 if (is_initializer) { | |
| 3964 if (is_static || is_final || is_synchronized || is_native || | |
| 3965 is_abstract || (major_gte_15 && is_bridge)) { | |
| 3966 is_illegal = true; | |
| 3967 } | |
| 3968 } else { // not initializer | |
| 3969 if (is_abstract) { | |
| 3970 if ((is_final || is_native || is_private || is_static || | |
| 3971 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 3972 is_illegal = true; | |
| 3973 } | |
| 3974 } | |
| 3975 if (has_illegal_visibility(flags)) { | |
| 3976 is_illegal = true; | |
| 3977 } | |
| 3978 } | |
| 3979 } | |
| 3980 | |
| 3981 if (is_illegal) { | |
| 3982 ResourceMark rm(THREAD); | |
| 3983 Exceptions::fthrow( | |
| 3984 THREAD_AND_LOCATION, | |
| 3985 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3986 "Method %s in class %s has illegal modifiers: 0x%X", | |
| 3987 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 3988 return; | |
| 3989 } | |
| 3990 } | |
| 3991 | |
| 3992 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 3993 assert(_need_verify, "only called when _need_verify is true"); | |
| 3994 int i = 0; | |
| 3995 int count = length >> 2; | |
| 3996 for (int k=0; k<count; k++) { | |
| 3997 unsigned char b0 = buffer[i]; | |
| 3998 unsigned char b1 = buffer[i+1]; | |
| 3999 unsigned char b2 = buffer[i+2]; | |
| 4000 unsigned char b3 = buffer[i+3]; | |
| 4001 // For an unsigned char v, | |
| 4002 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 4003 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 4004 unsigned char res = b0 | b0 - 1 | | |
| 4005 b1 | b1 - 1 | | |
| 4006 b2 | b2 - 1 | | |
| 4007 b3 | b3 - 1; | |
| 4008 if (res >= 128) break; | |
| 4009 i += 4; | |
| 4010 } | |
| 4011 for(; i < length; i++) { | |
| 4012 unsigned short c; | |
| 4013 // no embedded zeros | |
| 4014 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4015 if(buffer[i] < 128) { | |
| 4016 continue; | |
| 4017 } | |
| 4018 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 4019 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 4020 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 4021 i += 5; | |
| 4022 continue; | |
| 4023 } | |
| 4024 } | |
| 4025 switch (buffer[i] >> 4) { | |
| 4026 default: break; | |
| 4027 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 4028 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4029 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 4030 c = (buffer[i] & 0x1F) << 6; | |
| 4031 i++; | |
| 4032 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4033 c += buffer[i] & 0x3F; | |
| 4034 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 4035 // for classes with major > 47, c must a null or a character in its shortest form | |
| 4036 break; | |
| 4037 } | |
| 4038 } | |
| 4039 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4040 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 4041 c = (buffer[i] & 0xF) << 12; | |
| 4042 i += 2; | |
| 4043 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4044 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 4045 if (_major_version <= 47 || c >= 0x800) { | |
| 4046 // for classes with major > 47, c must be in its shortest form | |
| 4047 break; | |
| 4048 } | |
| 4049 } | |
| 4050 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4051 } // end of switch | |
| 4052 } // end of for | |
| 4053 } | |
| 4054 | |
| 4055 // Checks if name is a legal class name. | |
| 4056 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
| 4057 if (!_need_verify || _relax_verify) { return; } | |
| 4058 | |
| 4059 char buf[fixed_buffer_size]; | |
| 4060 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4061 unsigned int length = name->utf8_length(); | |
| 4062 bool legal = false; | |
| 4063 | |
| 4064 if (length > 0) { | |
| 4065 char* p; | |
| 4066 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 4067 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4068 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4069 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4070 if (bytes[0] != '<') { | |
| 4071 p = skip_over_field_name(bytes, true, length); | |
| 4072 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4073 } | |
| 4074 } else { | |
| 4075 // 4900761: relax the constraints based on JSR202 spec | |
| 4076 // Class names may be drawn from the entire Unicode character set. | |
| 4077 // Identifiers between '/' must be unqualified names. | |
| 4078 // The utf8 string has been verified when parsing cpool entries. | |
| 4079 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 4080 } | |
| 4081 } | |
| 4082 if (!legal) { | |
| 4083 ResourceMark rm(THREAD); | |
| 4084 Exceptions::fthrow( | |
| 4085 THREAD_AND_LOCATION, | |
| 4086 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4087 "Illegal class name \"%s\" in class file %s", bytes, | |
| 4088 _class_name->as_C_string() | |
| 4089 ); | |
| 4090 return; | |
| 4091 } | |
| 4092 } | |
| 4093 | |
| 4094 // Checks if name is a legal field name. | |
| 4095 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
| 4096 if (!_need_verify || _relax_verify) { return; } | |
| 4097 | |
| 4098 char buf[fixed_buffer_size]; | |
| 4099 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4100 unsigned int length = name->utf8_length(); | |
| 4101 bool legal = false; | |
| 4102 | |
| 4103 if (length > 0) { | |
| 4104 if (_major_version < JAVA_1_5_VERSION) { | |
| 4105 if (bytes[0] != '<') { | |
| 4106 char* p = skip_over_field_name(bytes, false, length); | |
| 4107 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4108 } | |
| 4109 } else { | |
| 4110 // 4881221: relax the constraints based on JSR202 spec | |
| 4111 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 4112 } | |
| 4113 } | |
| 4114 | |
| 4115 if (!legal) { | |
| 4116 ResourceMark rm(THREAD); | |
| 4117 Exceptions::fthrow( | |
| 4118 THREAD_AND_LOCATION, | |
| 4119 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4120 "Illegal field name \"%s\" in class %s", bytes, | |
| 4121 _class_name->as_C_string() | |
| 4122 ); | |
| 4123 return; | |
| 4124 } | |
| 4125 } | |
| 4126 | |
| 4127 // Checks if name is a legal method name. | |
| 4128 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
| 4129 if (!_need_verify || _relax_verify) { return; } | |
| 4130 | |
| 4131 assert(!name.is_null(), "method name is null"); | |
| 4132 char buf[fixed_buffer_size]; | |
| 4133 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4134 unsigned int length = name->utf8_length(); | |
| 4135 bool legal = false; | |
| 4136 | |
| 4137 if (length > 0) { | |
| 4138 if (bytes[0] == '<') { | |
| 4139 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 4140 legal = true; | |
| 4141 } | |
| 4142 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4143 char* p; | |
| 4144 p = skip_over_field_name(bytes, false, length); | |
| 4145 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4146 } else { | |
| 4147 // 4881221: relax the constraints based on JSR202 spec | |
| 4148 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 4149 } | |
| 4150 } | |
| 4151 | |
| 4152 if (!legal) { | |
| 4153 ResourceMark rm(THREAD); | |
| 4154 Exceptions::fthrow( | |
| 4155 THREAD_AND_LOCATION, | |
| 4156 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4157 "Illegal method name \"%s\" in class %s", bytes, | |
| 4158 _class_name->as_C_string() | |
| 4159 ); | |
| 4160 return; | |
| 4161 } | |
| 4162 } | |
| 4163 | |
| 4164 | |
| 4165 // Checks if signature is a legal field signature. | |
| 4166 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4167 if (!_need_verify) { return; } | |
| 4168 | |
| 4169 char buf[fixed_buffer_size]; | |
| 4170 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4171 unsigned int length = signature->utf8_length(); | |
| 4172 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4173 | |
| 4174 if (p == NULL || (p - bytes) != (int)length) { | |
| 4175 ResourceMark rm(THREAD); | |
| 4176 Exceptions::fthrow( | |
| 4177 THREAD_AND_LOCATION, | |
| 4178 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4179 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
| 4180 name->as_C_string(), _class_name->as_C_string(), bytes | |
| 4181 ); | |
| 4182 return; | |
| 4183 } | |
| 4184 } | |
| 4185 | |
| 4186 // Checks if signature is a legal method signature. | |
| 4187 // Returns number of parameters | |
| 4188 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 4189 if (!_need_verify) { | |
| 4190 // make sure caller's args_size will be less than 0 even for non-static | |
| 4191 // method so it will be recomputed in compute_size_of_parameters(). | |
| 4192 return -2; | |
| 4193 } | |
| 4194 | |
| 4195 unsigned int args_size = 0; | |
| 4196 char buf[fixed_buffer_size]; | |
| 4197 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4198 unsigned int length = signature->utf8_length(); | |
| 4199 char* nextp; | |
| 4200 | |
| 4201 // The first character must be a '(' | |
| 4202 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 4203 length--; | |
| 4204 // Skip over legal field signatures | |
| 4205 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4206 while ((length > 0) && (nextp != NULL)) { | |
| 4207 args_size++; | |
| 4208 if (p[0] == 'J' || p[0] == 'D') { | |
| 4209 args_size++; | |
| 4210 } | |
| 4211 length -= nextp - p; | |
| 4212 p = nextp; | |
| 4213 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4214 } | |
| 4215 // The first non-signature thing better be a ')' | |
| 4216 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 4217 length--; | |
| 4218 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 4219 // All internal methods must return void | |
| 4220 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 4221 return args_size; | |
| 4222 } | |
| 4223 } else { | |
| 4224 // Now we better just have a return value | |
| 4225 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 4226 if (nextp && ((int)length == (nextp - p))) { | |
| 4227 return args_size; | |
| 4228 } | |
| 4229 } | |
| 4230 } | |
| 4231 } | |
| 4232 // Report error | |
| 4233 ResourceMark rm(THREAD); | |
| 4234 Exceptions::fthrow( | |
| 4235 THREAD_AND_LOCATION, | |
| 4236 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 4237 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
| 4238 name->as_C_string(), _class_name->as_C_string(), p | |
| 4239 ); | |
| 4240 return 0; | |
| 4241 } | |
| 4242 | |
| 4243 | |
| 4244 // Unqualified names may not contain the characters '.', ';', or '/'. | |
| 4245 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
| 4246 // Note that method names may not be <init> or <clinit> in this method. | |
| 4247 // Because these names have been checked as special cases before calling this method | |
| 4248 // in verify_legal_method_name. | |
| 4249 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
| 4250 jchar ch; | |
| 4251 | |
| 4252 for (char* p = name; p != name + length; ) { | |
| 4253 ch = *p; | |
| 4254 if (ch < 128) { | |
| 4255 p++; | |
| 4256 if (ch == '.' || ch == ';') { | |
| 4257 return false; // do not permit '.' or ';' | |
| 4258 } | |
| 4259 if (type != LegalClass && ch == '/') { | |
| 4260 return false; // do not permit '/' unless it's class name | |
| 4261 } | |
| 4262 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 4263 return false; // do not permit '<' or '>' in method names | |
| 4264 } | |
| 4265 } else { | |
| 4266 char* tmp_p = UTF8::next(p, &ch); | |
| 4267 p = tmp_p; | |
| 4268 } | |
| 4269 } | |
| 4270 return true; | |
| 4271 } | |
| 4272 | |
| 4273 | |
| 4274 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4275 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 4276 // Return a pointer to just past the fieldname. | |
| 4277 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 4278 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 4279 // qualified path but found something that was badly-formed). | |
| 4280 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 4281 char* p; | |
| 4282 jchar ch; | |
| 4283 jboolean last_is_slash = false; | |
| 4284 jboolean not_first_ch = false; | |
| 4285 | |
| 4286 for (p = name; p != name + length; not_first_ch = true) { | |
| 4287 char* old_p = p; | |
| 4288 ch = *p; | |
| 4289 if (ch < 128) { | |
| 4290 p++; | |
| 4291 // quick check for ascii | |
| 4292 if ((ch >= 'a' && ch <= 'z') || | |
| 4293 (ch >= 'A' && ch <= 'Z') || | |
| 4294 (ch == '_' || ch == '$') || | |
| 4295 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 4296 last_is_slash = false; | |
| 4297 continue; | |
| 4298 } | |
| 4299 if (slash_ok && ch == '/') { | |
| 4300 if (last_is_slash) { | |
| 4301 return NULL; // Don't permit consecutive slashes | |
| 4302 } | |
| 4303 last_is_slash = true; | |
| 4304 continue; | |
| 4305 } | |
| 4306 } else { | |
| 4307 jint unicode_ch; | |
| 4308 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 4309 p = tmp_p; | |
| 4310 last_is_slash = false; | |
| 4311 // Check if ch is Java identifier start or is Java identifier part | |
| 4312 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 4313 EXCEPTION_MARK; | |
| 1142 | 4314 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); |
| 0 | 4315 |
| 4316 // return value | |
| 4317 JavaValue result(T_BOOLEAN); | |
| 4318 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 4319 JavaCallArguments args; | |
| 4320 args.push_int(unicode_ch); | |
| 4321 | |
| 4322 // public static boolean isJavaIdentifierStart(char ch); | |
| 4323 JavaCalls::call_static(&result, | |
| 4324 klass, | |
| 4325 vmSymbolHandles::isJavaIdentifierStart_name(), | |
| 4326 vmSymbolHandles::int_bool_signature(), | |
| 4327 &args, | |
| 4328 THREAD); | |
| 4329 | |
| 4330 if (HAS_PENDING_EXCEPTION) { | |
| 4331 CLEAR_PENDING_EXCEPTION; | |
| 4332 return 0; | |
| 4333 } | |
| 4334 if (result.get_jboolean()) { | |
| 4335 continue; | |
| 4336 } | |
| 4337 | |
| 4338 if (not_first_ch) { | |
| 4339 // public static boolean isJavaIdentifierPart(char ch); | |
| 4340 JavaCalls::call_static(&result, | |
| 4341 klass, | |
| 4342 vmSymbolHandles::isJavaIdentifierPart_name(), | |
| 4343 vmSymbolHandles::int_bool_signature(), | |
| 4344 &args, | |
| 4345 THREAD); | |
| 4346 | |
| 4347 if (HAS_PENDING_EXCEPTION) { | |
| 4348 CLEAR_PENDING_EXCEPTION; | |
| 4349 return 0; | |
| 4350 } | |
| 4351 | |
| 4352 if (result.get_jboolean()) { | |
| 4353 continue; | |
| 4354 } | |
| 4355 } | |
| 4356 } | |
| 4357 return (not_first_ch) ? old_p : NULL; | |
| 4358 } | |
| 4359 return (not_first_ch) ? p : NULL; | |
| 4360 } | |
| 4361 | |
| 4362 | |
| 4363 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4364 // be taken as a field signature. Allow "void" if void_ok. | |
| 4365 // Return a pointer to just past the signature. | |
| 4366 // Return NULL if no legal signature is found. | |
| 4367 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 4368 bool void_ok, | |
| 4369 unsigned int length, | |
| 4370 TRAPS) { | |
| 4371 unsigned int array_dim = 0; | |
| 4372 while (length > 0) { | |
| 4373 switch (signature[0]) { | |
| 4374 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4375 case JVM_SIGNATURE_BOOLEAN: | |
| 4376 case JVM_SIGNATURE_BYTE: | |
| 4377 case JVM_SIGNATURE_CHAR: | |
| 4378 case JVM_SIGNATURE_SHORT: | |
| 4379 case JVM_SIGNATURE_INT: | |
| 4380 case JVM_SIGNATURE_FLOAT: | |
| 4381 case JVM_SIGNATURE_LONG: | |
| 4382 case JVM_SIGNATURE_DOUBLE: | |
| 4383 return signature + 1; | |
| 4384 case JVM_SIGNATURE_CLASS: { | |
| 4385 if (_major_version < JAVA_1_5_VERSION) { | |
| 4386 // Skip over the class name if one is there | |
| 4387 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4388 | |
| 4389 // The next character better be a semicolon | |
| 4390 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4391 return p + 1; | |
| 4392 } | |
| 4393 } else { | |
| 4394 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4395 length--; | |
| 4396 signature++; | |
| 4397 while (length > 0 && signature[0] != ';') { | |
| 4398 if (signature[0] == '.') { | |
| 4399 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4400 } | |
| 4401 length--; | |
| 4402 signature++; | |
| 4403 } | |
| 4404 if (signature[0] == ';') { return signature + 1; } | |
| 4405 } | |
| 4406 | |
| 4407 return NULL; | |
| 4408 } | |
| 4409 case JVM_SIGNATURE_ARRAY: | |
| 4410 array_dim++; | |
| 4411 if (array_dim > 255) { | |
| 4412 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4413 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4414 } | |
| 4415 // The rest of what's there better be a legal signature | |
| 4416 signature++; | |
| 4417 length--; | |
| 4418 void_ok = false; | |
| 4419 break; | |
| 4420 | |
| 4421 default: | |
| 4422 return NULL; | |
| 4423 } | |
| 4424 } | |
| 4425 return NULL; | |
| 4426 } |