Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 92:ebec5b9731e2
6615981: JVM class file parser incorrectly rejects class files with version < 45.2
Summary: A check on Code length did not take into account the old sizes of the max_stack, max_locals, and code_length.
Reviewed-by: phh, sbohne
| author | kamg |
|---|---|
| date | Thu, 10 Apr 2008 12:21:01 -0400 |
| parents | a61af66fc99e |
| children | ba764ed4b6f2 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 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 | |
| 37 #define JAVA_MAX_SUPPORTED_VERSION 50 | |
| 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 | |
| 47 #define JAVA_6_VERSION 50 | |
| 48 | |
| 49 | |
| 50 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 51 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 52 // this function (_current can be allocated in a register, with scalar | |
| 53 // replacement of aggregates). The _current pointer is copied back to | |
| 54 // stream() when this function returns. DON'T call another method within | |
| 55 // this method that uses stream(). | |
| 56 ClassFileStream* cfs0 = stream(); | |
| 57 ClassFileStream cfs1 = *cfs0; | |
| 58 ClassFileStream* cfs = &cfs1; | |
| 59 #ifdef ASSERT | |
| 60 u1* old_current = cfs0->current(); | |
| 61 #endif | |
| 62 | |
| 63 // Used for batching symbol allocations. | |
| 64 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 65 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 66 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 67 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 68 int names_count = 0; | |
| 69 | |
| 70 // parsing Index 0 is unused | |
| 71 for (int index = 1; index < length; index++) { | |
| 72 // Each of the following case guarantees one more byte in the stream | |
| 73 // for the following tag or the access_flags following constant pool, | |
| 74 // so we don't need bounds-check for reading tag. | |
| 75 u1 tag = cfs->get_u1_fast(); | |
| 76 switch (tag) { | |
| 77 case JVM_CONSTANT_Class : | |
| 78 { | |
| 79 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 80 u2 name_index = cfs->get_u2_fast(); | |
| 81 cp->klass_index_at_put(index, name_index); | |
| 82 } | |
| 83 break; | |
| 84 case JVM_CONSTANT_Fieldref : | |
| 85 { | |
| 86 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 87 u2 class_index = cfs->get_u2_fast(); | |
| 88 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 89 cp->field_at_put(index, class_index, name_and_type_index); | |
| 90 } | |
| 91 break; | |
| 92 case JVM_CONSTANT_Methodref : | |
| 93 { | |
| 94 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 95 u2 class_index = cfs->get_u2_fast(); | |
| 96 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 97 cp->method_at_put(index, class_index, name_and_type_index); | |
| 98 } | |
| 99 break; | |
| 100 case JVM_CONSTANT_InterfaceMethodref : | |
| 101 { | |
| 102 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 103 u2 class_index = cfs->get_u2_fast(); | |
| 104 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 105 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 106 } | |
| 107 break; | |
| 108 case JVM_CONSTANT_String : | |
| 109 { | |
| 110 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 111 u2 string_index = cfs->get_u2_fast(); | |
| 112 cp->string_index_at_put(index, string_index); | |
| 113 } | |
| 114 break; | |
| 115 case JVM_CONSTANT_Integer : | |
| 116 { | |
| 117 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 118 u4 bytes = cfs->get_u4_fast(); | |
| 119 cp->int_at_put(index, (jint) bytes); | |
| 120 } | |
| 121 break; | |
| 122 case JVM_CONSTANT_Float : | |
| 123 { | |
| 124 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 125 u4 bytes = cfs->get_u4_fast(); | |
| 126 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 127 } | |
| 128 break; | |
| 129 case JVM_CONSTANT_Long : | |
| 130 // A mangled type might cause you to overrun allocated memory | |
| 131 guarantee_property(index+1 < length, | |
| 132 "Invalid constant pool entry %u in class file %s", | |
| 133 index, CHECK); | |
| 134 { | |
| 135 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 136 u8 bytes = cfs->get_u8_fast(); | |
| 137 cp->long_at_put(index, bytes); | |
| 138 } | |
| 139 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 140 break; | |
| 141 case JVM_CONSTANT_Double : | |
| 142 // A mangled type might cause you to overrun allocated memory | |
| 143 guarantee_property(index+1 < length, | |
| 144 "Invalid constant pool entry %u in class file %s", | |
| 145 index, CHECK); | |
| 146 { | |
| 147 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 148 u8 bytes = cfs->get_u8_fast(); | |
| 149 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 150 } | |
| 151 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 152 break; | |
| 153 case JVM_CONSTANT_NameAndType : | |
| 154 { | |
| 155 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 156 u2 name_index = cfs->get_u2_fast(); | |
| 157 u2 signature_index = cfs->get_u2_fast(); | |
| 158 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 159 } | |
| 160 break; | |
| 161 case JVM_CONSTANT_Utf8 : | |
| 162 { | |
| 163 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 164 u2 utf8_length = cfs->get_u2_fast(); | |
| 165 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 166 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 167 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 168 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 169 cfs->skip_u1_fast(utf8_length); | |
| 170 // Before storing the symbol, make sure it's legal | |
| 171 if (_need_verify) { | |
| 172 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 173 } | |
| 174 | |
| 175 unsigned int hash; | |
| 176 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
| 177 if (result == NULL) { | |
| 178 names[names_count] = (char*)utf8_buffer; | |
| 179 lengths[names_count] = utf8_length; | |
| 180 indices[names_count] = index; | |
| 181 hashValues[names_count++] = hash; | |
| 182 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
| 183 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 184 names_count = 0; | |
| 185 } | |
| 186 } else { | |
| 187 cp->symbol_at_put(index, result); | |
| 188 } | |
| 189 } | |
| 190 break; | |
| 191 default: | |
| 192 classfile_parse_error( | |
| 193 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 194 break; | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 // Allocate the remaining symbols | |
| 199 if (names_count > 0) { | |
| 200 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 201 } | |
| 202 | |
| 203 // Copy _current pointer of local copy back to stream(). | |
| 204 #ifdef ASSERT | |
| 205 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 206 #endif | |
| 207 cfs0->set_current(cfs1.current()); | |
| 208 } | |
| 209 | |
| 210 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
| 211 | |
| 212 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 213 ClassFileStream* cfs = stream(); | |
| 214 constantPoolHandle nullHandle; | |
| 215 | |
| 216 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 217 u2 length = cfs->get_u2_fast(); | |
| 218 guarantee_property( | |
| 219 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 220 length, CHECK_(nullHandle)); | |
| 221 constantPoolOop constant_pool = | |
| 222 oopFactory::new_constantPool(length, CHECK_(nullHandle)); | |
| 223 constantPoolHandle cp (THREAD, constant_pool); | |
| 224 | |
| 225 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
| 226 | |
| 227 // parsing constant pool entries | |
| 228 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 229 | |
| 230 int index = 1; // declared outside of loops for portability | |
| 231 | |
| 232 // first verification pass - validate cross references and fixup class and string constants | |
| 233 for (index = 1; index < length; index++) { // Index 0 is unused | |
| 234 switch (cp->tag_at(index).value()) { | |
| 235 case JVM_CONSTANT_Class : | |
| 236 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 237 break; | |
| 238 case JVM_CONSTANT_Fieldref : | |
| 239 // fall through | |
| 240 case JVM_CONSTANT_Methodref : | |
| 241 // fall through | |
| 242 case JVM_CONSTANT_InterfaceMethodref : { | |
| 243 if (!_need_verify) break; | |
| 244 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 245 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 246 check_property(valid_cp_range(klass_ref_index, length) && | |
| 247 cp->tag_at(klass_ref_index).is_klass_reference(), | |
| 248 "Invalid constant pool index %u in class file %s", | |
| 249 klass_ref_index, | |
| 250 CHECK_(nullHandle)); | |
| 251 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 252 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 253 "Invalid constant pool index %u in class file %s", | |
| 254 name_and_type_ref_index, | |
| 255 CHECK_(nullHandle)); | |
| 256 break; | |
| 257 } | |
| 258 case JVM_CONSTANT_String : | |
| 259 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 260 break; | |
| 261 case JVM_CONSTANT_Integer : | |
| 262 break; | |
| 263 case JVM_CONSTANT_Float : | |
| 264 break; | |
| 265 case JVM_CONSTANT_Long : | |
| 266 case JVM_CONSTANT_Double : | |
| 267 index++; | |
| 268 check_property( | |
| 269 (index < length && cp->tag_at(index).is_invalid()), | |
| 270 "Improper constant pool long/double index %u in class file %s", | |
| 271 index, CHECK_(nullHandle)); | |
| 272 break; | |
| 273 case JVM_CONSTANT_NameAndType : { | |
| 274 if (!_need_verify) break; | |
| 275 int name_ref_index = cp->name_ref_index_at(index); | |
| 276 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 277 check_property( | |
| 278 valid_cp_range(name_ref_index, length) && | |
| 279 cp->tag_at(name_ref_index).is_utf8(), | |
| 280 "Invalid constant pool index %u in class file %s", | |
| 281 name_ref_index, CHECK_(nullHandle)); | |
| 282 check_property( | |
| 283 valid_cp_range(signature_ref_index, length) && | |
| 284 cp->tag_at(signature_ref_index).is_utf8(), | |
| 285 "Invalid constant pool index %u in class file %s", | |
| 286 signature_ref_index, CHECK_(nullHandle)); | |
| 287 break; | |
| 288 } | |
| 289 case JVM_CONSTANT_Utf8 : | |
| 290 break; | |
| 291 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 292 case JVM_CONSTANT_UnresolvedClassInError: | |
| 293 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 294 break; | |
| 295 case JVM_CONSTANT_ClassIndex : | |
| 296 { | |
| 297 int class_index = cp->klass_index_at(index); | |
| 298 check_property( | |
| 299 valid_cp_range(class_index, length) && | |
| 300 cp->tag_at(class_index).is_utf8(), | |
| 301 "Invalid constant pool index %u in class file %s", | |
| 302 class_index, CHECK_(nullHandle)); | |
| 303 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 304 } | |
| 305 break; | |
| 306 case JVM_CONSTANT_UnresolvedString : | |
| 307 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 308 break; | |
| 309 case JVM_CONSTANT_StringIndex : | |
| 310 { | |
| 311 int string_index = cp->string_index_at(index); | |
| 312 check_property( | |
| 313 valid_cp_range(string_index, length) && | |
| 314 cp->tag_at(string_index).is_utf8(), | |
| 315 "Invalid constant pool index %u in class file %s", | |
| 316 string_index, CHECK_(nullHandle)); | |
| 317 symbolOop sym = cp->symbol_at(string_index); | |
| 318 cp->unresolved_string_at_put(index, sym); | |
| 319 } | |
| 320 break; | |
| 321 default: | |
| 322 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
| 323 ShouldNotReachHere(); | |
| 324 break; | |
| 325 } // end of switch | |
| 326 } // end of for | |
| 327 | |
| 328 if (!_need_verify) { | |
| 329 return cp; | |
| 330 } | |
| 331 | |
| 332 // second verification pass - checks the strings are of the right format. | |
| 333 for (index = 1; index < length; index++) { | |
| 334 jbyte tag = cp->tag_at(index).value(); | |
| 335 switch (tag) { | |
| 336 case JVM_CONSTANT_UnresolvedClass: { | |
| 337 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
| 338 verify_legal_class_name(class_name, CHECK_(nullHandle)); | |
| 339 break; | |
| 340 } | |
| 341 case JVM_CONSTANT_Fieldref: | |
| 342 case JVM_CONSTANT_Methodref: | |
| 343 case JVM_CONSTANT_InterfaceMethodref: { | |
| 344 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 345 // already verified to be utf8 | |
| 346 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 347 // already verified to be utf8 | |
| 348 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
| 349 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 350 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
| 351 if (tag == JVM_CONSTANT_Fieldref) { | |
| 352 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 353 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
| 354 } else { | |
| 355 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 356 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 357 if (tag == JVM_CONSTANT_Methodref) { | |
| 358 // 4509014: If a class method name begins with '<', it must be "<init>". | |
| 359 assert(!name.is_null(), "method name in constant pool is null"); | |
| 360 unsigned int name_len = name->utf8_length(); | |
| 361 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 362 if (name->byte_at(0) == '<') { | |
| 363 if (name() != vmSymbols::object_initializer_name()) { | |
| 364 classfile_parse_error( | |
| 365 "Bad method name at constant pool index %u in class file %s", | |
| 366 name_ref_index, CHECK_(nullHandle)); | |
| 367 } | |
| 368 } | |
| 369 } | |
| 370 } | |
| 371 break; | |
| 372 } | |
| 373 } // end of switch | |
| 374 } // end of for | |
| 375 | |
| 376 return cp; | |
| 377 } | |
| 378 | |
| 379 | |
| 380 class NameSigHash: public ResourceObj { | |
| 381 public: | |
| 382 symbolOop _name; // name | |
| 383 symbolOop _sig; // signature | |
| 384 NameSigHash* _next; // Next entry in hash table | |
| 385 }; | |
| 386 | |
| 387 | |
| 388 #define HASH_ROW_SIZE 256 | |
| 389 | |
| 390 unsigned int hash(symbolOop name, symbolOop sig) { | |
| 391 unsigned int raw_hash = 0; | |
| 392 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 393 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 394 | |
| 395 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 396 } | |
| 397 | |
| 398 | |
| 399 void initialize_hashtable(NameSigHash** table) { | |
| 400 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 401 } | |
| 402 | |
| 403 // Return false if the name/sig combination is found in table. | |
| 404 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 405 // The old format checker uses heap sort to find duplicates. | |
| 406 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
| 407 // of table since we don't expect symbolOop's to move. | |
| 408 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
| 409 assert(name != NULL, "name in constant pool is NULL"); | |
| 410 | |
| 411 // First lookup for duplicates | |
| 412 int index = hash(name, sig); | |
| 413 NameSigHash* entry = table[index]; | |
| 414 while (entry != NULL) { | |
| 415 if (entry->_name == name && entry->_sig == sig) { | |
| 416 return false; | |
| 417 } | |
| 418 entry = entry->_next; | |
| 419 } | |
| 420 | |
| 421 // No duplicate is found, allocate a new entry and fill it. | |
| 422 entry = new NameSigHash(); | |
| 423 entry->_name = name; | |
| 424 entry->_sig = sig; | |
| 425 | |
| 426 // Insert into hash table | |
| 427 entry->_next = table[index]; | |
| 428 table[index] = entry; | |
| 429 | |
| 430 return true; | |
| 431 } | |
| 432 | |
| 433 | |
| 434 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 435 int length, | |
| 436 Handle class_loader, | |
| 437 Handle protection_domain, | |
| 438 PerfTraceTime* vmtimer, | |
| 439 symbolHandle class_name, | |
| 440 TRAPS) { | |
| 441 ClassFileStream* cfs = stream(); | |
| 442 assert(length > 0, "only called for length>0"); | |
| 443 objArrayHandle nullHandle; | |
| 444 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 445 objArrayHandle interfaces (THREAD, interface_oop); | |
| 446 | |
| 447 int index; | |
| 448 for (index = 0; index < length; index++) { | |
| 449 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
| 450 check_property( | |
| 451 valid_cp_range(interface_index, cp->length()) && | |
| 452 cp->tag_at(interface_index).is_unresolved_klass(), | |
| 453 "Interface name has bad constant pool index %u in class file %s", | |
| 454 interface_index, CHECK_(nullHandle)); | |
| 455 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); | |
| 456 | |
| 457 // Don't need to check legal name because it's checked when parsing constant pool. | |
| 458 // But need to make sure it's not an array type. | |
| 459 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 460 "Bad interface name in class file %s", CHECK_(nullHandle)); | |
| 461 | |
| 462 vmtimer->suspend(); // do not count recursive loading twice | |
| 463 // Call resolve_super so classcircularity is checked | |
| 464 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 465 unresolved_klass, class_loader, protection_domain, | |
| 466 false, CHECK_(nullHandle)); | |
| 467 KlassHandle interf (THREAD, k); | |
| 468 vmtimer->resume(); | |
| 469 | |
| 470 if (!Klass::cast(interf())->is_interface()) { | |
| 471 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 472 } | |
| 473 interfaces->obj_at_put(index, interf()); | |
| 474 } | |
| 475 | |
| 476 if (!_need_verify || length <= 1) { | |
| 477 return interfaces; | |
| 478 } | |
| 479 | |
| 480 // Check if there's any duplicates in interfaces | |
| 481 ResourceMark rm(THREAD); | |
| 482 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 483 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 484 initialize_hashtable(interface_names); | |
| 485 bool dup = false; | |
| 486 { | |
| 487 debug_only(No_Safepoint_Verifier nsv;) | |
| 488 for (index = 0; index < length; index++) { | |
| 489 klassOop k = (klassOop)interfaces->obj_at(index); | |
| 490 symbolOop name = instanceKlass::cast(k)->name(); | |
| 491 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
| 492 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 493 dup = true; | |
| 494 break; | |
| 495 } | |
| 496 } | |
| 497 } | |
| 498 if (dup) { | |
| 499 classfile_parse_error("Duplicate interface name in class file %s", | |
| 500 CHECK_(nullHandle)); | |
| 501 } | |
| 502 | |
| 503 return interfaces; | |
| 504 } | |
| 505 | |
| 506 | |
| 507 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 508 // Make sure the constant pool entry is of a type appropriate to this field | |
| 509 guarantee_property( | |
| 510 (constantvalue_index > 0 && | |
| 511 constantvalue_index < cp->length()), | |
| 512 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 513 constantvalue_index, CHECK); | |
| 514 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 515 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 516 case T_LONG: | |
| 517 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 518 break; | |
| 519 case T_FLOAT: | |
| 520 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 521 break; | |
| 522 case T_DOUBLE: | |
| 523 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 524 break; | |
| 525 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 526 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 527 break; | |
| 528 case T_OBJECT: | |
| 529 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
| 530 && (value_type.is_string() || value_type.is_unresolved_string())), | |
| 531 "Bad string initial value in class file %s", CHECK); | |
| 532 break; | |
| 533 default: | |
| 534 classfile_parse_error( | |
| 535 "Unable to set initial value %u in class file %s", | |
| 536 constantvalue_index, CHECK); | |
| 537 } | |
| 538 } | |
| 539 | |
| 540 | |
| 541 // Parse attributes for a field. | |
| 542 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 543 u2 attributes_count, | |
| 544 bool is_static, u2 signature_index, | |
| 545 u2* constantvalue_index_addr, | |
| 546 bool* is_synthetic_addr, | |
| 547 u2* generic_signature_index_addr, | |
| 548 typeArrayHandle* field_annotations, | |
| 549 TRAPS) { | |
| 550 ClassFileStream* cfs = stream(); | |
| 551 assert(attributes_count > 0, "length should be greater than 0"); | |
| 552 u2 constantvalue_index = 0; | |
| 553 u2 generic_signature_index = 0; | |
| 554 bool is_synthetic = false; | |
| 555 u1* runtime_visible_annotations = NULL; | |
| 556 int runtime_visible_annotations_length = 0; | |
| 557 u1* runtime_invisible_annotations = NULL; | |
| 558 int runtime_invisible_annotations_length = 0; | |
| 559 while (attributes_count--) { | |
| 560 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 561 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 562 u4 attribute_length = cfs->get_u4_fast(); | |
| 563 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 564 cp->tag_at(attribute_name_index).is_utf8(), | |
| 565 "Invalid field attribute index %u in class file %s", | |
| 566 attribute_name_index, | |
| 567 CHECK); | |
| 568 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
| 569 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
| 570 // ignore if non-static | |
| 571 if (constantvalue_index != 0) { | |
| 572 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 573 } | |
| 574 check_property( | |
| 575 attribute_length == 2, | |
| 576 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 577 attribute_length, CHECK); | |
| 578 constantvalue_index = cfs->get_u2(CHECK); | |
| 579 if (_need_verify) { | |
| 580 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 581 } | |
| 582 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 583 if (attribute_length != 0) { | |
| 584 classfile_parse_error( | |
| 585 "Invalid Synthetic field attribute length %u in class file %s", | |
| 586 attribute_length, CHECK); | |
| 587 } | |
| 588 is_synthetic = true; | |
| 589 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 590 if (attribute_length != 0) { | |
| 591 classfile_parse_error( | |
| 592 "Invalid Deprecated field attribute length %u in class file %s", | |
| 593 attribute_length, CHECK); | |
| 594 } | |
| 595 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 596 if (attribute_name == vmSymbols::tag_signature()) { | |
| 597 if (attribute_length != 2) { | |
| 598 classfile_parse_error( | |
| 599 "Wrong size %u for field's Signature attribute in class file %s", | |
| 600 attribute_length, CHECK); | |
| 601 } | |
| 602 generic_signature_index = cfs->get_u2(CHECK); | |
| 603 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 604 runtime_visible_annotations_length = attribute_length; | |
| 605 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 606 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 607 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 608 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 609 runtime_invisible_annotations_length = attribute_length; | |
| 610 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 611 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 612 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 613 } else { | |
| 614 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 615 } | |
| 616 } else { | |
| 617 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 618 } | |
| 619 } | |
| 620 | |
| 621 *constantvalue_index_addr = constantvalue_index; | |
| 622 *is_synthetic_addr = is_synthetic; | |
| 623 *generic_signature_index_addr = generic_signature_index; | |
| 624 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 625 runtime_visible_annotations_length, | |
| 626 runtime_invisible_annotations, | |
| 627 runtime_invisible_annotations_length, | |
| 628 CHECK); | |
| 629 return; | |
| 630 } | |
| 631 | |
| 632 | |
| 633 // Field allocation types. Used for computing field offsets. | |
| 634 | |
| 635 enum FieldAllocationType { | |
| 636 STATIC_OOP, // Oops | |
| 637 STATIC_BYTE, // Boolean, Byte, char | |
| 638 STATIC_SHORT, // shorts | |
| 639 STATIC_WORD, // ints | |
| 640 STATIC_DOUBLE, // long or double | |
| 641 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 642 NONSTATIC_OOP, | |
| 643 NONSTATIC_BYTE, | |
| 644 NONSTATIC_SHORT, | |
| 645 NONSTATIC_WORD, | |
| 646 NONSTATIC_DOUBLE, | |
| 647 NONSTATIC_ALIGNED_DOUBLE | |
| 648 }; | |
| 649 | |
| 650 | |
| 651 struct FieldAllocationCount { | |
| 652 int static_oop_count; | |
| 653 int static_byte_count; | |
| 654 int static_short_count; | |
| 655 int static_word_count; | |
| 656 int static_double_count; | |
| 657 int nonstatic_oop_count; | |
| 658 int nonstatic_byte_count; | |
| 659 int nonstatic_short_count; | |
| 660 int nonstatic_word_count; | |
| 661 int nonstatic_double_count; | |
| 662 }; | |
| 663 | |
| 664 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 665 struct FieldAllocationCount *fac, | |
| 666 objArrayHandle* fields_annotations, TRAPS) { | |
| 667 ClassFileStream* cfs = stream(); | |
| 668 typeArrayHandle nullHandle; | |
| 669 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 670 u2 length = cfs->get_u2_fast(); | |
| 671 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 672 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 673 typeArrayHandle fields(THREAD, new_fields); | |
| 674 | |
| 675 int index = 0; | |
| 676 typeArrayHandle field_annotations; | |
| 677 for (int n = 0; n < length; n++) { | |
| 678 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 679 | |
| 680 AccessFlags access_flags; | |
| 681 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 682 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 683 access_flags.set_flags(flags); | |
| 684 | |
| 685 u2 name_index = cfs->get_u2_fast(); | |
| 686 int cp_size = cp->length(); | |
| 687 check_property( | |
| 688 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 689 "Invalid constant pool index %u for field name in class file %s", | |
| 690 name_index, CHECK_(nullHandle)); | |
| 691 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 692 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 693 | |
| 694 u2 signature_index = cfs->get_u2_fast(); | |
| 695 check_property( | |
| 696 valid_cp_range(signature_index, cp_size) && | |
| 697 cp->tag_at(signature_index).is_utf8(), | |
| 698 "Invalid constant pool index %u for field signature in class file %s", | |
| 699 signature_index, CHECK_(nullHandle)); | |
| 700 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
| 701 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
| 702 | |
| 703 u2 constantvalue_index = 0; | |
| 704 bool is_synthetic = false; | |
| 705 u2 generic_signature_index = 0; | |
| 706 bool is_static = access_flags.is_static(); | |
| 707 | |
| 708 u2 attributes_count = cfs->get_u2_fast(); | |
| 709 if (attributes_count > 0) { | |
| 710 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 711 &constantvalue_index, &is_synthetic, | |
| 712 &generic_signature_index, &field_annotations, | |
| 713 CHECK_(nullHandle)); | |
| 714 if (field_annotations.not_null()) { | |
| 715 if (fields_annotations->is_null()) { | |
| 716 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 717 *fields_annotations = objArrayHandle(THREAD, md); | |
| 718 } | |
| 719 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 720 } | |
| 721 if (is_synthetic) { | |
| 722 access_flags.set_is_synthetic(); | |
| 723 } | |
| 724 } | |
| 725 | |
| 726 fields->short_at_put(index++, access_flags.as_short()); | |
| 727 fields->short_at_put(index++, name_index); | |
| 728 fields->short_at_put(index++, signature_index); | |
| 729 fields->short_at_put(index++, constantvalue_index); | |
| 730 | |
| 731 // Remember how many oops we encountered and compute allocation type | |
| 732 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 733 FieldAllocationType atype; | |
| 734 if ( is_static ) { | |
| 735 switch ( type ) { | |
| 736 case T_BOOLEAN: | |
| 737 case T_BYTE: | |
| 738 fac->static_byte_count++; | |
| 739 atype = STATIC_BYTE; | |
| 740 break; | |
| 741 case T_LONG: | |
| 742 case T_DOUBLE: | |
| 743 if (Universe::field_type_should_be_aligned(type)) { | |
| 744 atype = STATIC_ALIGNED_DOUBLE; | |
| 745 } else { | |
| 746 atype = STATIC_DOUBLE; | |
| 747 } | |
| 748 fac->static_double_count++; | |
| 749 break; | |
| 750 case T_CHAR: | |
| 751 case T_SHORT: | |
| 752 fac->static_short_count++; | |
| 753 atype = STATIC_SHORT; | |
| 754 break; | |
| 755 case T_FLOAT: | |
| 756 case T_INT: | |
| 757 fac->static_word_count++; | |
| 758 atype = STATIC_WORD; | |
| 759 break; | |
| 760 case T_ARRAY: | |
| 761 case T_OBJECT: | |
| 762 fac->static_oop_count++; | |
| 763 atype = STATIC_OOP; | |
| 764 break; | |
| 765 case T_ADDRESS: | |
| 766 case T_VOID: | |
| 767 default: | |
| 768 assert(0, "bad field type"); | |
| 769 } | |
| 770 } else { | |
| 771 switch ( type ) { | |
| 772 case T_BOOLEAN: | |
| 773 case T_BYTE: | |
| 774 fac->nonstatic_byte_count++; | |
| 775 atype = NONSTATIC_BYTE; | |
| 776 break; | |
| 777 case T_LONG: | |
| 778 case T_DOUBLE: | |
| 779 if (Universe::field_type_should_be_aligned(type)) { | |
| 780 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 781 } else { | |
| 782 atype = NONSTATIC_DOUBLE; | |
| 783 } | |
| 784 fac->nonstatic_double_count++; | |
| 785 break; | |
| 786 case T_CHAR: | |
| 787 case T_SHORT: | |
| 788 fac->nonstatic_short_count++; | |
| 789 atype = NONSTATIC_SHORT; | |
| 790 break; | |
| 791 case T_FLOAT: | |
| 792 case T_INT: | |
| 793 fac->nonstatic_word_count++; | |
| 794 atype = NONSTATIC_WORD; | |
| 795 break; | |
| 796 case T_ARRAY: | |
| 797 case T_OBJECT: | |
| 798 fac->nonstatic_oop_count++; | |
| 799 atype = NONSTATIC_OOP; | |
| 800 break; | |
| 801 case T_ADDRESS: | |
| 802 case T_VOID: | |
| 803 default: | |
| 804 assert(0, "bad field type"); | |
| 805 } | |
| 806 } | |
| 807 | |
| 808 // The correct offset is computed later (all oop fields will be located together) | |
| 809 // We temporarily store the allocation type in the offset field | |
| 810 fields->short_at_put(index++, atype); | |
| 811 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 812 fields->short_at_put(index++, generic_signature_index); | |
| 813 } | |
| 814 | |
| 815 if (_need_verify && length > 1) { | |
| 816 // Check duplicated fields | |
| 817 ResourceMark rm(THREAD); | |
| 818 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 819 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 820 initialize_hashtable(names_and_sigs); | |
| 821 bool dup = false; | |
| 822 { | |
| 823 debug_only(No_Safepoint_Verifier nsv;) | |
| 824 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 825 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
| 826 symbolOop name = cp->symbol_at(name_index); | |
| 827 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
| 828 symbolOop sig = cp->symbol_at(sig_index); | |
| 829 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 830 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 831 dup = true; | |
| 832 break; | |
| 833 } | |
| 834 } | |
| 835 } | |
| 836 if (dup) { | |
| 837 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 838 CHECK_(nullHandle)); | |
| 839 } | |
| 840 } | |
| 841 | |
| 842 return fields; | |
| 843 } | |
| 844 | |
| 845 | |
| 846 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 847 while (length-- > 0) { | |
| 848 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 | |
| 853 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 854 u4 exception_table_length, | |
| 855 constantPoolHandle cp, | |
| 856 TRAPS) { | |
| 857 ClassFileStream* cfs = stream(); | |
| 858 typeArrayHandle nullHandle; | |
| 859 | |
| 860 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 861 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 862 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 863 | |
| 864 int index = 0; | |
| 865 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 866 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 867 u2 start_pc = cfs->get_u2_fast(); | |
| 868 u2 end_pc = cfs->get_u2_fast(); | |
| 869 u2 handler_pc = cfs->get_u2_fast(); | |
| 870 u2 catch_type_index = cfs->get_u2_fast(); | |
| 871 // Will check legal target after parsing code array in verifier. | |
| 872 if (_need_verify) { | |
| 873 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 874 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 875 guarantee_property(handler_pc < code_length, | |
| 876 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 877 if (catch_type_index != 0) { | |
| 878 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
| 879 (cp->tag_at(catch_type_index).is_klass() || | |
| 880 cp->tag_at(catch_type_index).is_unresolved_klass()), | |
| 881 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); | |
| 882 } | |
| 883 } | |
| 884 exception_handlers->int_at_put(index++, start_pc); | |
| 885 exception_handlers->int_at_put(index++, end_pc); | |
| 886 exception_handlers->int_at_put(index++, handler_pc); | |
| 887 exception_handlers->int_at_put(index++, catch_type_index); | |
| 888 } | |
| 889 return exception_handlers; | |
| 890 } | |
| 891 | |
| 892 void ClassFileParser::parse_linenumber_table( | |
| 893 u4 code_attribute_length, u4 code_length, | |
| 894 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 895 ClassFileStream* cfs = stream(); | |
| 896 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 897 | |
| 898 // Each entry is a u2 start_pc, and a u2 line_number | |
| 899 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 900 | |
| 901 // Verify line number attribute and table length | |
| 902 check_property( | |
| 903 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 904 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 905 | |
| 906 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 907 | |
| 908 if ((*write_stream) == NULL) { | |
| 909 if (length_in_bytes > fixed_buffer_size) { | |
| 910 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 911 } else { | |
| 912 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 913 linenumbertable_buffer, fixed_buffer_size); | |
| 914 } | |
| 915 } | |
| 916 | |
| 917 while (num_entries-- > 0) { | |
| 918 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 919 u2 line = cfs->get_u2_fast(); // line_number | |
| 920 guarantee_property(bci < code_length, | |
| 921 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 922 (*write_stream)->write_pair(bci, line); | |
| 923 } | |
| 924 } | |
| 925 | |
| 926 | |
| 927 // Class file LocalVariableTable elements. | |
| 928 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 929 public: | |
| 930 u2 start_bci; | |
| 931 u2 length; | |
| 932 u2 name_cp_index; | |
| 933 u2 descriptor_cp_index; | |
| 934 u2 slot; | |
| 935 }; | |
| 936 | |
| 937 | |
| 938 class LVT_Hash: public CHeapObj { | |
| 939 public: | |
| 940 LocalVariableTableElement *_elem; // element | |
| 941 LVT_Hash* _next; // Next entry in hash table | |
| 942 }; | |
| 943 | |
| 944 unsigned int hash(LocalVariableTableElement *elem) { | |
| 945 unsigned int raw_hash = elem->start_bci; | |
| 946 | |
| 947 raw_hash = elem->length + raw_hash * 37; | |
| 948 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 949 raw_hash = elem->slot + raw_hash * 37; | |
| 950 | |
| 951 return raw_hash % HASH_ROW_SIZE; | |
| 952 } | |
| 953 | |
| 954 void initialize_hashtable(LVT_Hash** table) { | |
| 955 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 956 table[i] = NULL; | |
| 957 } | |
| 958 } | |
| 959 | |
| 960 void clear_hashtable(LVT_Hash** table) { | |
| 961 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 962 LVT_Hash* current = table[i]; | |
| 963 LVT_Hash* next; | |
| 964 while (current != NULL) { | |
| 965 next = current->_next; | |
| 966 current->_next = NULL; | |
| 967 delete(current); | |
| 968 current = next; | |
| 969 } | |
| 970 table[i] = NULL; | |
| 971 } | |
| 972 } | |
| 973 | |
| 974 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 975 LVT_Hash* entry = table[index]; | |
| 976 | |
| 977 /* | |
| 978 * 3-tuple start_bci/length/slot has to be unique key, | |
| 979 * so the following comparison seems to be redundant: | |
| 980 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 981 */ | |
| 982 while (entry != NULL) { | |
| 983 if (elem->start_bci == entry->_elem->start_bci | |
| 984 && elem->length == entry->_elem->length | |
| 985 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 986 && elem->slot == entry->_elem->slot | |
| 987 ) { | |
| 988 return entry; | |
| 989 } | |
| 990 entry = entry->_next; | |
| 991 } | |
| 992 return NULL; | |
| 993 } | |
| 994 | |
| 995 // Return false if the local variable is found in table. | |
| 996 // Return true if no duplicate is found. | |
| 997 // And local variable is added as a new entry in table. | |
| 998 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 999 // First lookup for duplicates | |
| 1000 int index = hash(elem); | |
| 1001 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1002 | |
| 1003 if (entry != NULL) { | |
| 1004 return false; | |
| 1005 } | |
| 1006 // No duplicate is found, allocate a new entry and fill it. | |
| 1007 if ((entry = new LVT_Hash()) == NULL) { | |
| 1008 return false; | |
| 1009 } | |
| 1010 entry->_elem = elem; | |
| 1011 | |
| 1012 // Insert into hash table | |
| 1013 entry->_next = table[index]; | |
| 1014 table[index] = entry; | |
| 1015 | |
| 1016 return true; | |
| 1017 } | |
| 1018 | |
| 1019 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1020 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1021 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1022 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1023 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1024 lvt->signature_cp_index = 0; | |
| 1025 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1026 } | |
| 1027 | |
| 1028 // Function is used to parse both attributes: | |
| 1029 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1030 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1031 u2 max_locals, | |
| 1032 u4 code_attribute_length, | |
| 1033 constantPoolHandle cp, | |
| 1034 u2* localvariable_table_length, | |
| 1035 bool isLVTT, | |
| 1036 TRAPS) { | |
| 1037 ClassFileStream* cfs = stream(); | |
| 1038 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1039 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1040 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1041 // Verify local variable table attribute has right length | |
| 1042 if (_need_verify) { | |
| 1043 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1044 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1045 } | |
| 1046 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1047 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1048 if (!_need_verify) { | |
| 1049 cfs->skip_u2_fast(size); | |
| 1050 } else { | |
| 1051 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1052 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1053 u2 start_pc = cfs->get_u2_fast(); | |
| 1054 u2 length = cfs->get_u2_fast(); | |
| 1055 u2 name_index = cfs->get_u2_fast(); | |
| 1056 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1057 u2 index = cfs->get_u2_fast(); | |
| 1058 // Assign to a u4 to avoid overflow | |
| 1059 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1060 | |
| 1061 if (start_pc >= code_length) { | |
| 1062 classfile_parse_error( | |
| 1063 "Invalid start_pc %u in %s in class file %s", | |
| 1064 start_pc, tbl_name, CHECK_NULL); | |
| 1065 } | |
| 1066 if (end_pc > code_length) { | |
| 1067 classfile_parse_error( | |
| 1068 "Invalid length %u in %s in class file %s", | |
| 1069 length, tbl_name, CHECK_NULL); | |
| 1070 } | |
| 1071 int cp_size = cp->length(); | |
| 1072 guarantee_property( | |
| 1073 valid_cp_range(name_index, cp_size) && | |
| 1074 cp->tag_at(name_index).is_utf8(), | |
| 1075 "Name index %u in %s has bad constant type in class file %s", | |
| 1076 name_index, tbl_name, CHECK_NULL); | |
| 1077 guarantee_property( | |
| 1078 valid_cp_range(descriptor_index, cp_size) && | |
| 1079 cp->tag_at(descriptor_index).is_utf8(), | |
| 1080 "Signature index %u in %s has bad constant type in class file %s", | |
| 1081 descriptor_index, tbl_name, CHECK_NULL); | |
| 1082 | |
| 1083 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1084 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
| 1085 verify_legal_field_name(name, CHECK_NULL); | |
| 1086 u2 extra_slot = 0; | |
| 1087 if (!isLVTT) { | |
| 1088 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1089 | |
| 1090 // 4894874: check special cases for double and long local variables | |
| 1091 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
| 1092 sig() == vmSymbols::type_signature(T_LONG)) { | |
| 1093 extra_slot = 1; | |
| 1094 } | |
| 1095 } | |
| 1096 guarantee_property((index + extra_slot) < max_locals, | |
| 1097 "Invalid index %u in %s in class file %s", | |
| 1098 index, tbl_name, CHECK_NULL); | |
| 1099 } | |
| 1100 } | |
| 1101 return localvariable_table_start; | |
| 1102 } | |
| 1103 | |
| 1104 | |
| 1105 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1106 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1107 ClassFileStream* cfs = stream(); | |
| 1108 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1109 u4 i1 = *u1_index; | |
| 1110 u4 i2 = *u2_index + 1; | |
| 1111 for(int i = 0; i < array_length; i++) { | |
| 1112 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1113 index++; | |
| 1114 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1115 index++; | |
| 1116 } else if (tag == ITEM_Object) { | |
| 1117 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1118 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
| 1119 cp->tag_at(class_index).is_unresolved_klass(), | |
| 1120 "Bad class index %u in StackMap in class file %s", | |
| 1121 class_index, CHECK); | |
| 1122 } else if (tag == ITEM_Uninitialized) { | |
| 1123 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1124 guarantee_property( | |
| 1125 offset < code_length, | |
| 1126 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1127 offset, CHECK); | |
| 1128 } else { | |
| 1129 guarantee_property( | |
| 1130 tag <= (u1)ITEM_Uninitialized, | |
| 1131 "Unknown variable type %u in StackMap in class file %s", | |
| 1132 tag, CHECK); | |
| 1133 } | |
| 1134 } | |
| 1135 u2_array[*u2_index] = index; | |
| 1136 *u1_index = i1; | |
| 1137 *u2_index = i2; | |
| 1138 } | |
| 1139 | |
| 1140 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1141 u4 code_attribute_length, TRAPS) { | |
| 1142 if (code_attribute_length == 0) | |
| 1143 return NULL; | |
| 1144 | |
| 1145 ClassFileStream* cfs = stream(); | |
| 1146 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1147 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1148 | |
| 1149 // check code_attribute_length first | |
| 1150 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1151 | |
| 1152 if (!_need_verify && !DumpSharedSpaces) { | |
| 1153 return NULL; | |
| 1154 } | |
| 1155 | |
| 1156 typeArrayOop stackmap_data = | |
| 1157 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1158 | |
| 1159 stackmap_data->set_length(code_attribute_length); | |
| 1160 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1161 (void*)stackmap_table_start, code_attribute_length); | |
| 1162 return stackmap_data; | |
| 1163 } | |
| 1164 | |
| 1165 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1166 u4 method_attribute_length, | |
| 1167 constantPoolHandle cp, TRAPS) { | |
| 1168 ClassFileStream* cfs = stream(); | |
| 1169 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1170 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1171 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1172 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1173 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1174 if (!_need_verify) { | |
| 1175 cfs->skip_u2_fast(size); | |
| 1176 } else { | |
| 1177 // Verify each value in the checked exception table | |
| 1178 u2 checked_exception; | |
| 1179 u2 len = *checked_exceptions_length; | |
| 1180 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1181 for (int i = 0; i < len; i++) { | |
| 1182 checked_exception = cfs->get_u2_fast(); | |
| 1183 check_property( | |
| 1184 valid_cp_range(checked_exception, cp->length()) && | |
| 1185 cp->tag_at(checked_exception).is_klass_reference(), | |
| 1186 "Exception name has bad type at constant pool %u in class file %s", | |
| 1187 checked_exception, CHECK_NULL); | |
| 1188 } | |
| 1189 } | |
| 1190 // check exceptions attribute length | |
| 1191 if (_need_verify) { | |
| 1192 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1193 sizeof(u2) * size), | |
| 1194 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1195 } | |
| 1196 return checked_exceptions_start; | |
| 1197 } | |
| 1198 | |
| 1199 | |
| 1200 #define MAX_ARGS_SIZE 255 | |
| 1201 #define MAX_CODE_SIZE 65535 | |
| 1202 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1203 | |
| 1204 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1205 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1206 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1207 // entire method attribute is parsed. | |
| 1208 // | |
| 1209 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1210 // from the method back up to the containing klass. These flag values | |
| 1211 // are added to klass's access_flags. | |
| 1212 | |
| 1213 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1214 AccessFlags *promoted_flags, | |
| 1215 typeArrayHandle* method_annotations, | |
| 1216 typeArrayHandle* method_parameter_annotations, | |
| 1217 typeArrayHandle* method_default_annotations, | |
| 1218 TRAPS) { | |
| 1219 ClassFileStream* cfs = stream(); | |
| 1220 methodHandle nullHandle; | |
| 1221 ResourceMark rm(THREAD); | |
| 1222 // Parse fixed parts | |
| 1223 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1224 | |
| 1225 int flags = cfs->get_u2_fast(); | |
| 1226 u2 name_index = cfs->get_u2_fast(); | |
| 1227 int cp_size = cp->length(); | |
| 1228 check_property( | |
| 1229 valid_cp_range(name_index, cp_size) && | |
| 1230 cp->tag_at(name_index).is_utf8(), | |
| 1231 "Illegal constant pool index %u for method name in class file %s", | |
| 1232 name_index, CHECK_(nullHandle)); | |
| 1233 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1234 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 1235 | |
| 1236 u2 signature_index = cfs->get_u2_fast(); | |
| 1237 guarantee_property( | |
| 1238 valid_cp_range(signature_index, cp_size) && | |
| 1239 cp->tag_at(signature_index).is_utf8(), | |
| 1240 "Illegal constant pool index %u for method signature in class file %s", | |
| 1241 signature_index, CHECK_(nullHandle)); | |
| 1242 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
| 1243 | |
| 1244 AccessFlags access_flags; | |
| 1245 if (name == vmSymbols::class_initializer_name()) { | |
| 1246 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1247 flags = JVM_ACC_STATIC; | |
| 1248 } else { | |
| 1249 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1250 } | |
| 1251 | |
| 1252 int args_size = -1; // only used when _need_verify is true | |
| 1253 if (_need_verify) { | |
| 1254 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1255 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1256 if (args_size > MAX_ARGS_SIZE) { | |
| 1257 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1258 } | |
| 1259 } | |
| 1260 | |
| 1261 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1262 | |
| 1263 // Default values for code and exceptions attribute elements | |
| 1264 u2 max_stack = 0; | |
| 1265 u2 max_locals = 0; | |
| 1266 u4 code_length = 0; | |
| 1267 u1* code_start = 0; | |
| 1268 u2 exception_table_length = 0; | |
| 1269 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1270 u2 checked_exceptions_length = 0; | |
| 1271 u2* checked_exceptions_start = NULL; | |
| 1272 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1273 int linenumber_table_length = 0; | |
| 1274 int total_lvt_length = 0; | |
| 1275 u2 lvt_cnt = 0; | |
| 1276 u2 lvtt_cnt = 0; | |
| 1277 bool lvt_allocated = false; | |
| 1278 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1279 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1280 u2* localvariable_table_length; | |
| 1281 u2** localvariable_table_start; | |
| 1282 u2* localvariable_type_table_length; | |
| 1283 u2** localvariable_type_table_start; | |
| 1284 bool parsed_code_attribute = false; | |
| 1285 bool parsed_checked_exceptions_attribute = false; | |
| 1286 bool parsed_stackmap_attribute = false; | |
| 1287 // stackmap attribute - JDK1.5 | |
| 1288 typeArrayHandle stackmap_data; | |
| 1289 u2 generic_signature_index = 0; | |
| 1290 u1* runtime_visible_annotations = NULL; | |
| 1291 int runtime_visible_annotations_length = 0; | |
| 1292 u1* runtime_invisible_annotations = NULL; | |
| 1293 int runtime_invisible_annotations_length = 0; | |
| 1294 u1* runtime_visible_parameter_annotations = NULL; | |
| 1295 int runtime_visible_parameter_annotations_length = 0; | |
| 1296 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1297 int runtime_invisible_parameter_annotations_length = 0; | |
| 1298 u1* annotation_default = NULL; | |
| 1299 int annotation_default_length = 0; | |
| 1300 | |
| 1301 // Parse code and exceptions attribute | |
| 1302 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1303 while (method_attributes_count--) { | |
| 1304 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1305 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1306 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1307 check_property( | |
| 1308 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1309 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1310 "Invalid method attribute name index %u in class file %s", | |
| 1311 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1312 | |
| 1313 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
| 1314 if (method_attribute_name == vmSymbols::tag_code()) { | |
| 1315 // Parse Code attribute | |
| 1316 if (_need_verify) { | |
| 1317 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1318 "Code attribute in native or abstract methods in class file %s", | |
| 1319 CHECK_(nullHandle)); | |
| 1320 } | |
| 1321 if (parsed_code_attribute) { | |
| 1322 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1323 } | |
| 1324 parsed_code_attribute = true; | |
| 1325 | |
| 1326 // Stack size, locals size, and code size | |
| 1327 if (_major_version == 45 && _minor_version <= 2) { | |
| 1328 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1329 max_stack = cfs->get_u1_fast(); | |
| 1330 max_locals = cfs->get_u1_fast(); | |
| 1331 code_length = cfs->get_u2_fast(); | |
| 1332 } else { | |
| 1333 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1334 max_stack = cfs->get_u2_fast(); | |
| 1335 max_locals = cfs->get_u2_fast(); | |
| 1336 code_length = cfs->get_u4_fast(); | |
| 1337 } | |
| 1338 if (_need_verify) { | |
| 1339 guarantee_property(args_size <= max_locals, | |
| 1340 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1341 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1342 "Invalid method Code length %u in class file %s", | |
| 1343 code_length, CHECK_(nullHandle)); | |
| 1344 } | |
| 1345 // Code pointer | |
| 1346 code_start = cfs->get_u1_buffer(); | |
| 1347 assert(code_start != NULL, "null code start"); | |
| 1348 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1349 cfs->skip_u1_fast(code_length); | |
| 1350 | |
| 1351 // Exception handler table | |
| 1352 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1353 exception_table_length = cfs->get_u2_fast(); | |
| 1354 if (exception_table_length > 0) { | |
| 1355 exception_handlers = | |
| 1356 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1357 } | |
| 1358 | |
| 1359 // Parse additional attributes in code attribute | |
| 1360 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1361 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1362 |
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1363 unsigned int calculated_attribute_length = 0; |
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1364 |
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1365 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1366 calculated_attribute_length = |
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1367 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1368 } else { |
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1369 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1370 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1371 } |
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1372 calculated_attribute_length += |
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1373 code_length + |
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1374 sizeof(exception_table_length) + |
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1375 sizeof(code_attributes_count) + |
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1376 exception_table_length * |
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1377 ( sizeof(u2) + // start_pc |
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1378 sizeof(u2) + // end_pc |
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1379 sizeof(u2) + // handler_pc |
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1380 sizeof(u2) ); // catch_type_index |
| 0 | 1381 |
| 1382 while (code_attributes_count--) { | |
| 1383 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1384 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1385 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1386 calculated_attribute_length += code_attribute_length + | |
| 1387 sizeof(code_attribute_name_index) + | |
| 1388 sizeof(code_attribute_length); | |
| 1389 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1390 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1391 "Invalid code attribute name index %u in class file %s", | |
| 1392 code_attribute_name_index, | |
| 1393 CHECK_(nullHandle)); | |
| 1394 if (LoadLineNumberTables && | |
| 1395 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1396 // Parse and compress line number table | |
| 1397 parse_linenumber_table(code_attribute_length, code_length, | |
| 1398 &linenumber_table, CHECK_(nullHandle)); | |
| 1399 | |
| 1400 } else if (LoadLocalVariableTables && | |
| 1401 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1402 // Parse local variable table | |
| 1403 if (!lvt_allocated) { | |
| 1404 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1405 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1406 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1407 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1408 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1409 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1410 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1411 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1412 lvt_allocated = true; | |
| 1413 } | |
| 1414 if (lvt_cnt == max_lvt_cnt) { | |
| 1415 max_lvt_cnt <<= 1; | |
| 1416 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1417 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1418 } | |
| 1419 localvariable_table_start[lvt_cnt] = | |
| 1420 parse_localvariable_table(code_length, | |
| 1421 max_locals, | |
| 1422 code_attribute_length, | |
| 1423 cp, | |
| 1424 &localvariable_table_length[lvt_cnt], | |
| 1425 false, // is not LVTT | |
| 1426 CHECK_(nullHandle)); | |
| 1427 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1428 lvt_cnt++; | |
| 1429 } else if (LoadLocalVariableTypeTables && | |
| 1430 _major_version >= JAVA_1_5_VERSION && | |
| 1431 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1432 if (!lvt_allocated) { | |
| 1433 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1434 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1435 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1436 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1437 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1438 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1439 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1440 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1441 lvt_allocated = true; | |
| 1442 } | |
| 1443 // Parse local variable type table | |
| 1444 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1445 max_lvtt_cnt <<= 1; | |
| 1446 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1447 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1448 } | |
| 1449 localvariable_type_table_start[lvtt_cnt] = | |
| 1450 parse_localvariable_table(code_length, | |
| 1451 max_locals, | |
| 1452 code_attribute_length, | |
| 1453 cp, | |
| 1454 &localvariable_type_table_length[lvtt_cnt], | |
| 1455 true, // is LVTT | |
| 1456 CHECK_(nullHandle)); | |
| 1457 lvtt_cnt++; | |
| 1458 } else if (UseSplitVerifier && | |
| 1459 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1460 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1461 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1462 if (parsed_stackmap_attribute) { | |
| 1463 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1464 } | |
| 1465 typeArrayOop sm = | |
| 1466 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1467 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1468 parsed_stackmap_attribute = true; | |
| 1469 } else { | |
| 1470 // Skip unknown attributes | |
| 1471 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1472 } | |
| 1473 } | |
| 1474 // check method attribute length | |
| 1475 if (_need_verify) { | |
| 1476 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1477 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1478 } | |
| 1479 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1480 // Parse Exceptions attribute | |
| 1481 if (parsed_checked_exceptions_attribute) { | |
| 1482 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1483 } | |
| 1484 parsed_checked_exceptions_attribute = true; | |
| 1485 checked_exceptions_start = | |
| 1486 parse_checked_exceptions(&checked_exceptions_length, | |
| 1487 method_attribute_length, | |
| 1488 cp, CHECK_(nullHandle)); | |
| 1489 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1490 if (method_attribute_length != 0) { | |
| 1491 classfile_parse_error( | |
| 1492 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1493 method_attribute_length, CHECK_(nullHandle)); | |
| 1494 } | |
| 1495 // Should we check that there hasn't already been a synthetic attribute? | |
| 1496 access_flags.set_is_synthetic(); | |
| 1497 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1498 if (method_attribute_length != 0) { | |
| 1499 classfile_parse_error( | |
| 1500 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1501 method_attribute_length, CHECK_(nullHandle)); | |
| 1502 } | |
| 1503 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1504 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1505 if (method_attribute_length != 2) { | |
| 1506 classfile_parse_error( | |
| 1507 "Invalid Signature attribute length %u in class file %s", | |
| 1508 method_attribute_length, CHECK_(nullHandle)); | |
| 1509 } | |
| 1510 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1511 generic_signature_index = cfs->get_u2_fast(); | |
| 1512 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1513 runtime_visible_annotations_length = method_attribute_length; | |
| 1514 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1515 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1516 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1517 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1518 runtime_invisible_annotations_length = method_attribute_length; | |
| 1519 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1520 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1521 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1522 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1523 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1524 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1525 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1526 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1527 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1528 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1529 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1530 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1531 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1532 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1533 annotation_default_length = method_attribute_length; | |
| 1534 annotation_default = cfs->get_u1_buffer(); | |
| 1535 assert(annotation_default != NULL, "null annotation default"); | |
| 1536 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1537 } else { | |
| 1538 // Skip unknown attributes | |
| 1539 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1540 } | |
| 1541 } else { | |
| 1542 // Skip unknown attributes | |
| 1543 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1544 } | |
| 1545 } | |
| 1546 | |
| 1547 if (linenumber_table != NULL) { | |
| 1548 linenumber_table->write_terminator(); | |
| 1549 linenumber_table_length = linenumber_table->position(); | |
| 1550 } | |
| 1551 | |
| 1552 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1553 if (_need_verify) { | |
| 1554 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1555 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1556 } | |
| 1557 | |
| 1558 // All sizing information for a methodOop is finally available, now create it | |
| 1559 methodOop m_oop = oopFactory::new_method( | |
| 1560 code_length, access_flags, linenumber_table_length, | |
| 1561 total_lvt_length, checked_exceptions_length, CHECK_(nullHandle)); | |
| 1562 methodHandle m (THREAD, m_oop); | |
| 1563 | |
| 1564 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1565 | |
| 1566 // Fill in information from fixed part (access_flags already set) | |
| 1567 m->set_constants(cp()); | |
| 1568 m->set_name_index(name_index); | |
| 1569 m->set_signature_index(signature_index); | |
| 1570 m->set_generic_signature_index(generic_signature_index); | |
| 1571 #ifdef CC_INTERP | |
| 1572 // hmm is there a gc issue here?? | |
| 1573 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1574 m->set_result_index(rtf.type()); | |
| 1575 #endif | |
| 1576 | |
| 1577 if (args_size >= 0) { | |
| 1578 m->set_size_of_parameters(args_size); | |
| 1579 } else { | |
| 1580 m->compute_size_of_parameters(THREAD); | |
| 1581 } | |
| 1582 #ifdef ASSERT | |
| 1583 if (args_size >= 0) { | |
| 1584 m->compute_size_of_parameters(THREAD); | |
| 1585 assert(args_size == m->size_of_parameters(), ""); | |
| 1586 } | |
| 1587 #endif | |
| 1588 | |
| 1589 // Fill in code attribute information | |
| 1590 m->set_max_stack(max_stack); | |
| 1591 m->set_max_locals(max_locals); | |
| 1592 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1593 | |
| 1594 /** | |
| 1595 * The exception_table field is the flag used to indicate | |
| 1596 * that the methodOop and it's associated constMethodOop are partially | |
| 1597 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1598 * the field is set, the oops are considered fully initialized so make | |
| 1599 * sure that the oops can pass verification when this field is set. | |
| 1600 */ | |
| 1601 m->set_exception_table(exception_handlers()); | |
| 1602 | |
| 1603 // Copy byte codes | |
| 1604 if (code_length > 0) { | |
| 1605 memcpy(m->code_base(), code_start, code_length); | |
| 1606 } | |
| 1607 | |
| 1608 // Copy line number table | |
| 1609 if (linenumber_table != NULL) { | |
| 1610 memcpy(m->compressed_linenumber_table(), | |
| 1611 linenumber_table->buffer(), linenumber_table_length); | |
| 1612 } | |
| 1613 | |
| 1614 // Copy checked exceptions | |
| 1615 if (checked_exceptions_length > 0) { | |
| 1616 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1617 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1618 } | |
| 1619 | |
| 1620 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1621 * | |
| 1622 * Rules for LVT's and LVTT's are: | |
| 1623 * - There can be any number of LVT's and LVTT's. | |
| 1624 * - If there are n LVT's, it is the same as if there was just | |
| 1625 * one LVT containing all the entries from the n LVT's. | |
| 1626 * - There may be no more than one LVT entry per local variable. | |
| 1627 * Two LVT entries are 'equal' if these fields are the same: | |
| 1628 * start_pc, length, name, slot | |
| 1629 * - There may be no more than one LVTT entry per each LVT entry. | |
| 1630 * Each LVTT entry has to match some LVT entry. | |
| 1631 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 1632 */ | |
| 1633 if (total_lvt_length > 0) { | |
| 1634 int tbl_no, idx; | |
| 1635 | |
| 1636 promoted_flags->set_has_localvariable_table(); | |
| 1637 | |
| 1638 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 1639 initialize_hashtable(lvt_Hash); | |
| 1640 | |
| 1641 // To fill LocalVariableTable in | |
| 1642 Classfile_LVT_Element* cf_lvt; | |
| 1643 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 1644 | |
| 1645 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 1646 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 1647 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 1648 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 1649 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 1650 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 1651 && _need_verify | |
| 1652 && _major_version >= JAVA_1_5_VERSION ) { | |
| 1653 clear_hashtable(lvt_Hash); | |
| 1654 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 1655 "entry for '%s' in class file %s", | |
| 1656 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 1657 CHECK_(nullHandle)); | |
| 1658 } | |
| 1659 } | |
| 1660 } | |
| 1661 | |
| 1662 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 1663 Classfile_LVT_Element* cf_lvtt; | |
| 1664 LocalVariableTableElement lvtt_elem; | |
| 1665 | |
| 1666 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 1667 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 1668 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 1669 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 1670 int index = hash(&lvtt_elem); | |
| 1671 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 1672 if (entry == NULL) { | |
| 1673 if (_need_verify) { | |
| 1674 clear_hashtable(lvt_Hash); | |
| 1675 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 1676 "does not match any LVT entry", | |
| 1677 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1678 CHECK_(nullHandle)); | |
| 1679 } | |
| 1680 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 1681 clear_hashtable(lvt_Hash); | |
| 1682 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 1683 "entry for '%s' in class file %s", | |
| 1684 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1685 CHECK_(nullHandle)); | |
| 1686 } else { | |
| 1687 // to add generic signatures into LocalVariableTable | |
| 1688 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 1689 } | |
| 1690 } | |
| 1691 } | |
| 1692 clear_hashtable(lvt_Hash); | |
| 1693 } | |
| 1694 | |
| 1695 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 1696 runtime_visible_annotations_length, | |
| 1697 runtime_invisible_annotations, | |
| 1698 runtime_invisible_annotations_length, | |
| 1699 CHECK_(nullHandle)); | |
| 1700 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 1701 runtime_visible_parameter_annotations_length, | |
| 1702 runtime_invisible_parameter_annotations, | |
| 1703 runtime_invisible_parameter_annotations_length, | |
| 1704 CHECK_(nullHandle)); | |
| 1705 *method_default_annotations = assemble_annotations(annotation_default, | |
| 1706 annotation_default_length, | |
| 1707 NULL, | |
| 1708 0, | |
| 1709 CHECK_(nullHandle)); | |
| 1710 | |
| 1711 if (name() == vmSymbols::finalize_method_name() && | |
| 1712 signature() == vmSymbols::void_method_signature()) { | |
| 1713 if (m->is_empty_method()) { | |
| 1714 _has_empty_finalizer = true; | |
| 1715 } else { | |
| 1716 _has_finalizer = true; | |
| 1717 } | |
| 1718 } | |
| 1719 if (name() == vmSymbols::object_initializer_name() && | |
| 1720 signature() == vmSymbols::void_method_signature() && | |
| 1721 m->is_vanilla_constructor()) { | |
| 1722 _has_vanilla_constructor = true; | |
| 1723 } | |
| 1724 | |
| 1725 return m; | |
| 1726 } | |
| 1727 | |
| 1728 | |
| 1729 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1730 // from the methods back up to the containing klass. These flag values | |
| 1731 // are added to klass's access_flags. | |
| 1732 | |
| 1733 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 1734 AccessFlags* promoted_flags, | |
| 1735 bool* has_final_method, | |
| 1736 objArrayOop* methods_annotations_oop, | |
| 1737 objArrayOop* methods_parameter_annotations_oop, | |
| 1738 objArrayOop* methods_default_annotations_oop, | |
| 1739 TRAPS) { | |
| 1740 ClassFileStream* cfs = stream(); | |
| 1741 objArrayHandle nullHandle; | |
| 1742 typeArrayHandle method_annotations; | |
| 1743 typeArrayHandle method_parameter_annotations; | |
| 1744 typeArrayHandle method_default_annotations; | |
| 1745 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1746 u2 length = cfs->get_u2_fast(); | |
| 1747 if (length == 0) { | |
| 1748 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 1749 } else { | |
| 1750 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1751 objArrayHandle methods(THREAD, m); | |
| 1752 HandleMark hm(THREAD); | |
| 1753 objArrayHandle methods_annotations; | |
| 1754 objArrayHandle methods_parameter_annotations; | |
| 1755 objArrayHandle methods_default_annotations; | |
| 1756 for (int index = 0; index < length; index++) { | |
| 1757 methodHandle method = parse_method(cp, is_interface, | |
| 1758 promoted_flags, | |
| 1759 &method_annotations, | |
| 1760 &method_parameter_annotations, | |
| 1761 &method_default_annotations, | |
| 1762 CHECK_(nullHandle)); | |
| 1763 if (method->is_final()) { | |
| 1764 *has_final_method = true; | |
| 1765 } | |
| 1766 methods->obj_at_put(index, method()); | |
| 1767 if (method_annotations.not_null()) { | |
| 1768 if (methods_annotations.is_null()) { | |
| 1769 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1770 methods_annotations = objArrayHandle(THREAD, md); | |
| 1771 } | |
| 1772 methods_annotations->obj_at_put(index, method_annotations()); | |
| 1773 } | |
| 1774 if (method_parameter_annotations.not_null()) { | |
| 1775 if (methods_parameter_annotations.is_null()) { | |
| 1776 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1777 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 1778 } | |
| 1779 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 1780 } | |
| 1781 if (method_default_annotations.not_null()) { | |
| 1782 if (methods_default_annotations.is_null()) { | |
| 1783 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1784 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 1785 } | |
| 1786 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 1787 } | |
| 1788 } | |
| 1789 if (_need_verify && length > 1) { | |
| 1790 // Check duplicated methods | |
| 1791 ResourceMark rm(THREAD); | |
| 1792 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1793 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1794 initialize_hashtable(names_and_sigs); | |
| 1795 bool dup = false; | |
| 1796 { | |
| 1797 debug_only(No_Safepoint_Verifier nsv;) | |
| 1798 for (int i = 0; i < length; i++) { | |
| 1799 methodOop m = (methodOop)methods->obj_at(i); | |
| 1800 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 1801 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 1802 dup = true; | |
| 1803 break; | |
| 1804 } | |
| 1805 } | |
| 1806 } | |
| 1807 if (dup) { | |
| 1808 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 1809 CHECK_(nullHandle)); | |
| 1810 } | |
| 1811 } | |
| 1812 | |
| 1813 *methods_annotations_oop = methods_annotations(); | |
| 1814 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 1815 *methods_default_annotations_oop = methods_default_annotations(); | |
| 1816 | |
| 1817 return methods; | |
| 1818 } | |
| 1819 } | |
| 1820 | |
| 1821 | |
| 1822 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 1823 objArrayHandle methods_annotations, | |
| 1824 objArrayHandle methods_parameter_annotations, | |
| 1825 objArrayHandle methods_default_annotations, | |
| 1826 TRAPS) { | |
| 1827 typeArrayHandle nullHandle; | |
| 1828 int length = methods()->length(); | |
| 1829 // If JVMTI original method ordering is enabled we have to | |
| 1830 // remember the original class file ordering. | |
| 1831 // We temporarily use the vtable_index field in the methodOop to store the | |
| 1832 // class file index, so we can read in after calling qsort. | |
| 1833 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1834 for (int index = 0; index < length; index++) { | |
| 1835 methodOop m = methodOop(methods->obj_at(index)); | |
| 1836 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 1837 m->set_vtable_index(index); | |
| 1838 } | |
| 1839 } | |
| 1840 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
| 1841 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
| 1842 methodOopDesc::sort_methods(methods(), | |
| 1843 methods_annotations(), | |
| 1844 methods_parameter_annotations(), | |
| 1845 methods_default_annotations()); | |
| 1846 | |
| 1847 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 1848 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1849 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 1850 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 1851 for (int index = 0; index < length; index++) { | |
| 1852 methodOop m = methodOop(methods->obj_at(index)); | |
| 1853 int old_index = m->vtable_index(); | |
| 1854 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 1855 method_ordering->int_at_put(index, old_index); | |
| 1856 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 1857 } | |
| 1858 return method_ordering; | |
| 1859 } else { | |
| 1860 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 1861 } | |
| 1862 } | |
| 1863 | |
| 1864 | |
| 1865 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1866 ClassFileStream* cfs = stream(); | |
| 1867 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 1868 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 1869 check_property( | |
| 1870 valid_cp_range(sourcefile_index, cp->length()) && | |
| 1871 cp->tag_at(sourcefile_index).is_utf8(), | |
| 1872 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 1873 sourcefile_index, CHECK); | |
| 1874 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 1875 } | |
| 1876 | |
| 1877 | |
| 1878 | |
| 1879 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 1880 instanceKlassHandle k, | |
| 1881 int length, TRAPS) { | |
| 1882 ClassFileStream* cfs = stream(); | |
| 1883 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 1884 assert(sde_buffer != NULL, "null sde buffer"); | |
| 1885 | |
| 1886 // Don't bother storing it if there is no way to retrieve it | |
| 1887 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 1888 // Optimistically assume that only 1 byte UTF format is used | |
| 1889 // (common case) | |
| 1890 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
| 1891 length, CHECK); | |
| 1892 k->set_source_debug_extension(sde_symbol); | |
| 1893 } | |
| 1894 // Got utf8 string, set stream position forward | |
| 1895 cfs->skip_u1(length, CHECK); | |
| 1896 } | |
| 1897 | |
| 1898 | |
| 1899 // Inner classes can be static, private or protected (classic VM does this) | |
| 1900 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 1901 | |
| 1902 // Return number of classes in the inner classes attribute table | |
| 1903 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1904 ClassFileStream* cfs = stream(); | |
| 1905 cfs->guarantee_more(2, CHECK_0); // length | |
| 1906 u2 length = cfs->get_u2_fast(); | |
| 1907 | |
| 1908 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 1909 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 1910 typeArrayHandle inner_classes(THREAD, ic); | |
| 1911 int index = 0; | |
| 1912 int cp_size = cp->length(); | |
| 1913 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 1914 for (int n = 0; n < length; n++) { | |
| 1915 // Inner class index | |
| 1916 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 1917 check_property( | |
| 1918 inner_class_info_index == 0 || | |
| 1919 (valid_cp_range(inner_class_info_index, cp_size) && | |
| 1920 cp->tag_at(inner_class_info_index).is_klass_reference()), | |
| 1921 "inner_class_info_index %u has bad constant type in class file %s", | |
| 1922 inner_class_info_index, CHECK_0); | |
| 1923 // Outer class index | |
| 1924 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 1925 check_property( | |
| 1926 outer_class_info_index == 0 || | |
| 1927 (valid_cp_range(outer_class_info_index, cp_size) && | |
| 1928 cp->tag_at(outer_class_info_index).is_klass_reference()), | |
| 1929 "outer_class_info_index %u has bad constant type in class file %s", | |
| 1930 outer_class_info_index, CHECK_0); | |
| 1931 // Inner class name | |
| 1932 u2 inner_name_index = cfs->get_u2_fast(); | |
| 1933 check_property( | |
| 1934 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 1935 cp->tag_at(inner_name_index).is_utf8()), | |
| 1936 "inner_name_index %u has bad constant type in class file %s", | |
| 1937 inner_name_index, CHECK_0); | |
| 1938 if (_need_verify) { | |
| 1939 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 1940 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 1941 } | |
| 1942 // Access flags | |
| 1943 AccessFlags inner_access_flags; | |
| 1944 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 1945 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 1946 // Set abstract bit for old class files for backward compatibility | |
| 1947 flags |= JVM_ACC_ABSTRACT; | |
| 1948 } | |
| 1949 verify_legal_class_modifiers(flags, CHECK_0); | |
| 1950 inner_access_flags.set_flags(flags); | |
| 1951 | |
| 1952 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 1953 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 1954 inner_classes->short_at_put(index++, inner_name_index); | |
| 1955 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 1956 } | |
| 1957 | |
| 1958 // 4347400: make sure there's no duplicate entry in the classes array | |
| 1959 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 1960 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 1961 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 1962 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 1963 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 1964 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 1965 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 1966 "Duplicate entry in InnerClasses in class file %s", | |
| 1967 CHECK_0); | |
| 1968 } | |
| 1969 } | |
| 1970 } | |
| 1971 | |
| 1972 // Update instanceKlass with inner class info. | |
| 1973 k->set_inner_classes(inner_classes()); | |
| 1974 return length; | |
| 1975 } | |
| 1976 | |
| 1977 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1978 k->set_is_synthetic(); | |
| 1979 } | |
| 1980 | |
| 1981 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1982 ClassFileStream* cfs = stream(); | |
| 1983 u2 signature_index = cfs->get_u2(CHECK); | |
| 1984 check_property( | |
| 1985 valid_cp_range(signature_index, cp->length()) && | |
| 1986 cp->tag_at(signature_index).is_utf8(), | |
| 1987 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 1988 signature_index, CHECK); | |
| 1989 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 1990 } | |
| 1991 | |
| 1992 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1993 ClassFileStream* cfs = stream(); | |
| 1994 // Set inner classes attribute to default sentinel | |
| 1995 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 1996 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 1997 u2 attributes_count = cfs->get_u2_fast(); | |
| 1998 bool parsed_sourcefile_attribute = false; | |
| 1999 bool parsed_innerclasses_attribute = false; | |
| 2000 bool parsed_enclosingmethod_attribute = false; | |
| 2001 u1* runtime_visible_annotations = NULL; | |
| 2002 int runtime_visible_annotations_length = 0; | |
| 2003 u1* runtime_invisible_annotations = NULL; | |
| 2004 int runtime_invisible_annotations_length = 0; | |
| 2005 // Iterate over attributes | |
| 2006 while (attributes_count--) { | |
| 2007 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2008 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2009 u4 attribute_length = cfs->get_u4_fast(); | |
| 2010 check_property( | |
| 2011 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2012 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2013 "Attribute name has bad constant pool index %u in class file %s", | |
| 2014 attribute_name_index, CHECK); | |
| 2015 symbolOop tag = cp->symbol_at(attribute_name_index); | |
| 2016 if (tag == vmSymbols::tag_source_file()) { | |
| 2017 // Check for SourceFile tag | |
| 2018 if (_need_verify) { | |
| 2019 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2020 } | |
| 2021 if (parsed_sourcefile_attribute) { | |
| 2022 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2023 } else { | |
| 2024 parsed_sourcefile_attribute = true; | |
| 2025 } | |
| 2026 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2027 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2028 // Check for SourceDebugExtension tag | |
| 2029 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2030 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2031 // Check for InnerClasses tag | |
| 2032 if (parsed_innerclasses_attribute) { | |
| 2033 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2034 } else { | |
| 2035 parsed_innerclasses_attribute = true; | |
| 2036 } | |
| 2037 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2038 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2039 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2040 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2041 } | |
| 2042 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2043 // Check for Synthetic tag | |
| 2044 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2045 if (attribute_length != 0) { | |
| 2046 classfile_parse_error( | |
| 2047 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2048 attribute_length, CHECK); | |
| 2049 } | |
| 2050 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2051 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2052 // Check for Deprecatd tag - 4276120 | |
| 2053 if (attribute_length != 0) { | |
| 2054 classfile_parse_error( | |
| 2055 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2056 attribute_length, CHECK); | |
| 2057 } | |
| 2058 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2059 if (tag == vmSymbols::tag_signature()) { | |
| 2060 if (attribute_length != 2) { | |
| 2061 classfile_parse_error( | |
| 2062 "Wrong Signature attribute length %u in class file %s", | |
| 2063 attribute_length, CHECK); | |
| 2064 } | |
| 2065 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2066 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2067 runtime_visible_annotations_length = attribute_length; | |
| 2068 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2069 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2070 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2071 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2072 runtime_invisible_annotations_length = attribute_length; | |
| 2073 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2074 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2075 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2076 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2077 if (parsed_enclosingmethod_attribute) { | |
| 2078 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2079 } else { | |
| 2080 parsed_enclosingmethod_attribute = true; | |
| 2081 } | |
| 2082 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2083 u2 class_index = cfs->get_u2_fast(); | |
| 2084 u2 method_index = cfs->get_u2_fast(); | |
| 2085 if (class_index == 0) { | |
| 2086 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2087 } | |
| 2088 // Validate the constant pool indices and types | |
| 2089 if (!cp->is_within_bounds(class_index) || | |
| 2090 !cp->tag_at(class_index).is_klass_reference()) { | |
| 2091 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2092 } | |
| 2093 if (method_index != 0 && | |
| 2094 (!cp->is_within_bounds(method_index) || | |
| 2095 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2096 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2097 } | |
| 2098 k->set_enclosing_method_indices(class_index, method_index); | |
| 2099 } else { | |
| 2100 // Unknown attribute | |
| 2101 cfs->skip_u1(attribute_length, CHECK); | |
| 2102 } | |
| 2103 } else { | |
| 2104 // Unknown attribute | |
| 2105 cfs->skip_u1(attribute_length, CHECK); | |
| 2106 } | |
| 2107 } | |
| 2108 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2109 runtime_visible_annotations_length, | |
| 2110 runtime_invisible_annotations, | |
| 2111 runtime_invisible_annotations_length, | |
| 2112 CHECK); | |
| 2113 k->set_class_annotations(annotations()); | |
| 2114 } | |
| 2115 | |
| 2116 | |
| 2117 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2118 int runtime_visible_annotations_length, | |
| 2119 u1* runtime_invisible_annotations, | |
| 2120 int runtime_invisible_annotations_length, TRAPS) { | |
| 2121 typeArrayHandle annotations; | |
| 2122 if (runtime_visible_annotations != NULL || | |
| 2123 runtime_invisible_annotations != NULL) { | |
| 2124 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2125 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2126 annotations = typeArrayHandle(THREAD, anno); | |
| 2127 if (runtime_visible_annotations != NULL) { | |
| 2128 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2129 } | |
| 2130 if (runtime_invisible_annotations != NULL) { | |
| 2131 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2132 } | |
| 2133 } | |
| 2134 return annotations; | |
| 2135 } | |
| 2136 | |
| 2137 | |
| 2138 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2139 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2140 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2141 if (fd->has_initial_value()) { | |
| 2142 BasicType t = fd->field_type(); | |
| 2143 switch (t) { | |
| 2144 case T_BYTE: | |
| 2145 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2146 break; | |
| 2147 case T_BOOLEAN: | |
| 2148 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2149 break; | |
| 2150 case T_CHAR: | |
| 2151 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2152 break; | |
| 2153 case T_SHORT: | |
| 2154 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2155 break; | |
| 2156 case T_INT: | |
| 2157 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2158 break; | |
| 2159 case T_FLOAT: | |
| 2160 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2161 break; | |
| 2162 case T_DOUBLE: | |
| 2163 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2164 break; | |
| 2165 case T_LONG: | |
| 2166 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2167 break; | |
| 2168 case T_OBJECT: | |
| 2169 { | |
| 2170 #ifdef ASSERT | |
| 2171 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
| 2172 assert(fd->signature() == sym, "just checking"); | |
| 2173 #endif | |
| 2174 oop string = fd->string_initial_value(CHECK); | |
| 2175 h_k()->obj_field_put(fd->offset(), string); | |
| 2176 } | |
| 2177 break; | |
| 2178 default: | |
| 2179 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2180 "Illegal ConstantValue attribute in class file"); | |
| 2181 } | |
| 2182 } | |
| 2183 } | |
| 2184 | |
| 2185 | |
| 2186 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2187 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2188 // This code is for compatibility with earlier jdk's that do not | |
| 2189 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2190 // the check for the "discovered" field should issue a warning if | |
| 2191 // the field is not found. For 1.6 this code should be issue a | |
| 2192 // fatal error if the "discovered" field is not found. | |
| 2193 // | |
| 2194 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2195 // next type of non-static oops leaves room for the fake oop. | |
| 2196 // Do not increment next_nonstatic_oop_offset so that the | |
| 2197 // fake oop is place after the java.lang.ref.Reference oop | |
| 2198 // fields. | |
| 2199 // | |
| 2200 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2201 // field. If it is not present, artifically create a field for it. | |
| 2202 // This allows this VM to run on early JDK where the field is not | |
| 2203 // present. | |
| 2204 | |
| 2205 // | |
| 2206 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2207 // next type of non-static oops leaves room for the fake oop. | |
| 2208 // Do not increment next_nonstatic_oop_offset so that the | |
| 2209 // fake oop is place after the java.lang.ref.Reference oop | |
| 2210 // fields. | |
| 2211 // | |
| 2212 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2213 // field. If it is not present, artifically create a field for it. | |
| 2214 // This allows this VM to run on early JDK where the field is not | |
| 2215 // present. | |
| 2216 int reference_sig_index = 0; | |
| 2217 int reference_name_index = 0; | |
| 2218 int reference_index = 0; | |
| 2219 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2220 const int n = (*fields_ptr)()->length(); | |
| 2221 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2222 int name_index = | |
| 2223 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2224 int sig_index = | |
| 2225 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2226 symbolOop f_name = cp->symbol_at(name_index); | |
| 2227 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2228 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
| 2229 // Save the index for reference signature for later use. | |
| 2230 // The fake discovered field does not entries in the | |
| 2231 // constant pool so the index for its signature cannot | |
| 2232 // be extracted from the constant pool. It will need | |
| 2233 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2234 // so same an index for that signature. | |
| 2235 reference_sig_index = sig_index; | |
| 2236 reference_name_index = name_index; | |
| 2237 reference_index = i; | |
| 2238 } | |
| 2239 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2240 f_sig == vmSymbols::reference_signature()) { | |
| 2241 // The values below are fake but will force extra | |
| 2242 // non-static oop fields and a corresponding non-static | |
| 2243 // oop map block to be allocated. | |
| 2244 extra = 0; | |
| 2245 break; | |
| 2246 } | |
| 2247 } | |
| 2248 if (extra != 0) { | |
| 2249 fac_ptr->nonstatic_oop_count += extra; | |
| 2250 // Add the additional entry to "fields" so that the klass | |
| 2251 // contains the "discoverd" field and the field will be initialized | |
| 2252 // in instances of the object. | |
| 2253 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2254 instanceKlass::next_offset; | |
| 2255 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2256 fields_with_fix_length, CHECK); | |
| 2257 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2258 | |
| 2259 // Take everything from the original but the length. | |
| 2260 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2261 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2262 } | |
| 2263 | |
| 2264 // Add the fake field at the end. | |
| 2265 int i = (*fields_ptr)->length(); | |
| 2266 // There is no name index for the fake "discovered" field nor | |
| 2267 // signature but a signature is needed so that the field will | |
| 2268 // be properly initialized. Use one found for | |
| 2269 // one of the other reference fields. Be sure the index for the | |
| 2270 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2271 // name is checked. That check is by passed for the last nonstatic | |
| 2272 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2273 // this artificial "discovered" field. An assertion checks that | |
| 2274 // the name index is 0. | |
| 2275 assert(reference_index != 0, "Missing signature for reference"); | |
| 2276 | |
| 2277 int j; | |
| 2278 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2279 fields_with_fix->ushort_at_put(i + j, | |
| 2280 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2281 } | |
| 2282 // Clear the public access flag and set the private access flag. | |
| 2283 short flags; | |
| 2284 flags = | |
| 2285 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2286 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2287 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2288 flags = flags | JVM_ACC_PRIVATE; | |
| 2289 AccessFlags access_flags; | |
| 2290 access_flags.set_flags(flags); | |
| 2291 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2292 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2293 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2294 flags); | |
| 2295 | |
| 2296 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2297 == reference_name_index, "The fake reference name is incorrect"); | |
| 2298 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2299 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2300 // The type of the field is stored in the low_offset entry during | |
| 2301 // parsing. | |
| 2302 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2303 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2304 | |
| 2305 // "fields" is allocated in the permanent generation. Disgard | |
| 2306 // it and let it be collected. | |
| 2307 (*fields_ptr) = fields_with_fix; | |
| 2308 } | |
| 2309 return; | |
| 2310 } | |
| 2311 | |
| 2312 | |
| 2313 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2314 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2315 // Add fake fields for java.lang.Class instances | |
| 2316 // | |
| 2317 // This is not particularly nice. We should consider adding a | |
| 2318 // private transient object field at the Java level to | |
| 2319 // java.lang.Class. Alternatively we could add a subclass of | |
| 2320 // instanceKlass which provides an accessor and size computer for | |
| 2321 // this field, but that appears to be more code than this hack. | |
| 2322 // | |
| 2323 // NOTE that we wedge these in at the beginning rather than the | |
| 2324 // end of the object because the Class layout changed between JDK | |
| 2325 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2326 // nonstatic oop fields were added at the Java level. The offsets | |
| 2327 // of these fake fields can't change between these two JDK | |
| 2328 // versions because when the offsets are computed at bootstrap | |
| 2329 // time we don't know yet which version of the JDK we're running in. | |
| 2330 | |
| 2331 // The values below are fake but will force two non-static oop fields and | |
| 2332 // a corresponding non-static oop map block to be allocated. | |
| 2333 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2334 fac_ptr->nonstatic_oop_count += extra; | |
| 2335 } | |
| 2336 | |
| 2337 | |
| 2338 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2339 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2340 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2341 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2342 // location where the real java fields are placed. | |
| 2343 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2344 (*next_nonstatic_oop_offset_ptr) += (extra * wordSize); | |
| 2345 } | |
| 2346 | |
| 2347 | |
| 2348 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, | |
| 2349 Handle class_loader, | |
| 2350 Handle protection_domain, | |
| 2351 symbolHandle& parsed_name, | |
| 2352 TRAPS) { | |
| 2353 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2354 // have modified it | |
| 2355 unsigned char *cached_class_file_bytes = NULL; | |
| 2356 jint cached_class_file_length; | |
| 2357 | |
| 2358 ClassFileStream* cfs = stream(); | |
| 2359 // Timing | |
| 2360 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
| 2361 | |
| 2362 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
| 2363 | |
| 2364 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2365 unsigned char* ptr = cfs->buffer(); | |
| 2366 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2367 | |
| 2368 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2369 &ptr, &end_ptr, | |
| 2370 &cached_class_file_bytes, | |
| 2371 &cached_class_file_length); | |
| 2372 | |
| 2373 if (ptr != cfs->buffer()) { | |
| 2374 // JVMTI agent has modified class file data. | |
| 2375 // Set new class file stream using JVMTI agent modified | |
| 2376 // class file data. | |
| 2377 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2378 set_stream(cfs); | |
| 2379 } | |
| 2380 } | |
| 2381 | |
| 2382 | |
| 2383 instanceKlassHandle nullHandle; | |
| 2384 | |
| 2385 // Figure out whether we can skip format checking (matching classic VM behavior) | |
| 2386 _need_verify = Verifier::should_verify_for(class_loader()); | |
| 2387 | |
| 2388 // Set the verify flag in stream | |
| 2389 cfs->set_verify(_need_verify); | |
| 2390 | |
| 2391 // Save the class file name for easier error message printing. | |
| 2392 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
| 2393 | |
| 2394 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2395 // Magic value | |
| 2396 u4 magic = cfs->get_u4_fast(); | |
| 2397 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2398 "Incompatible magic value %u in class file %s", | |
| 2399 magic, CHECK_(nullHandle)); | |
| 2400 | |
| 2401 // Version numbers | |
| 2402 u2 minor_version = cfs->get_u2_fast(); | |
| 2403 u2 major_version = cfs->get_u2_fast(); | |
| 2404 | |
| 2405 // Check version numbers - we check this even with verifier off | |
| 2406 if (!is_supported_version(major_version, minor_version)) { | |
| 2407 if (name.is_null()) { | |
| 2408 Exceptions::fthrow( | |
| 2409 THREAD_AND_LOCATION, | |
| 2410 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2411 "Unsupported major.minor version %u.%u", | |
| 2412 major_version, | |
| 2413 minor_version); | |
| 2414 } else { | |
| 2415 ResourceMark rm(THREAD); | |
| 2416 Exceptions::fthrow( | |
| 2417 THREAD_AND_LOCATION, | |
| 2418 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2419 "%s : Unsupported major.minor version %u.%u", | |
| 2420 name->as_C_string(), | |
| 2421 major_version, | |
| 2422 minor_version); | |
| 2423 } | |
| 2424 return nullHandle; | |
| 2425 } | |
| 2426 | |
| 2427 _major_version = major_version; | |
| 2428 _minor_version = minor_version; | |
| 2429 | |
| 2430 | |
| 2431 // Check if verification needs to be relaxed for this class file | |
| 2432 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2433 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2434 | |
| 2435 // Constant pool | |
| 2436 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
| 2437 int cp_size = cp->length(); | |
| 2438 | |
| 2439 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2440 | |
| 2441 // Access flags | |
| 2442 AccessFlags access_flags; | |
| 2443 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2444 | |
| 2445 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2446 // Set abstract bit for old class files for backward compatibility | |
| 2447 flags |= JVM_ACC_ABSTRACT; | |
| 2448 } | |
| 2449 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2450 access_flags.set_flags(flags); | |
| 2451 | |
| 2452 // This class and superclass | |
| 2453 instanceKlassHandle super_klass; | |
| 2454 u2 this_class_index = cfs->get_u2_fast(); | |
| 2455 check_property( | |
| 2456 valid_cp_range(this_class_index, cp_size) && | |
| 2457 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2458 "Invalid this class index %u in constant pool in class file %s", | |
| 2459 this_class_index, CHECK_(nullHandle)); | |
| 2460 | |
| 2461 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
| 2462 assert(class_name.not_null(), "class_name can't be null"); | |
| 2463 | |
| 2464 // It's important to set parsed_name *before* resolving the super class. | |
| 2465 // (it's used for cleanup by the caller if parsing fails) | |
| 2466 parsed_name = class_name; | |
| 2467 | |
| 2468 // Update _class_name which could be null previously to be class_name | |
| 2469 _class_name = class_name; | |
| 2470 | |
| 2471 // Don't need to check whether this class name is legal or not. | |
| 2472 // It has been checked when constant pool is parsed. | |
| 2473 // However, make sure it is not an array type. | |
| 2474 if (_need_verify) { | |
| 2475 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2476 "Bad class name in class file %s", | |
| 2477 CHECK_(nullHandle)); | |
| 2478 } | |
| 2479 | |
| 2480 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2481 | |
| 2482 // release all handles when parsing is done | |
| 2483 { HandleMark hm(THREAD); | |
| 2484 | |
| 2485 // Checks if name in class file matches requested name | |
| 2486 if (name.not_null() && class_name() != name()) { | |
| 2487 ResourceMark rm(THREAD); | |
| 2488 Exceptions::fthrow( | |
| 2489 THREAD_AND_LOCATION, | |
| 2490 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
| 2491 "%s (wrong name: %s)", | |
| 2492 name->as_C_string(), | |
| 2493 class_name->as_C_string() | |
| 2494 ); | |
| 2495 return nullHandle; | |
| 2496 } | |
| 2497 | |
| 2498 if (TraceClassLoadingPreorder) { | |
| 2499 tty->print("[Loading %s", name()->as_klass_external_name()); | |
| 2500 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
| 2501 tty->print_cr("]"); | |
| 2502 } | |
| 2503 | |
| 2504 u2 super_class_index = cfs->get_u2_fast(); | |
| 2505 if (super_class_index == 0) { | |
| 2506 check_property(class_name() == vmSymbols::java_lang_Object(), | |
| 2507 "Invalid superclass index %u in class file %s", | |
| 2508 super_class_index, | |
| 2509 CHECK_(nullHandle)); | |
| 2510 } else { | |
| 2511 check_property(valid_cp_range(super_class_index, cp_size) && | |
| 2512 cp->tag_at(super_class_index).is_unresolved_klass(), | |
| 2513 "Invalid superclass index %u in class file %s", | |
| 2514 super_class_index, | |
| 2515 CHECK_(nullHandle)); | |
| 2516 // The class name should be legal because it is checked when parsing constant pool. | |
| 2517 // However, make sure it is not an array type. | |
| 2518 if (_need_verify) { | |
| 2519 guarantee_property(cp->unresolved_klass_at(super_class_index)->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2520 "Bad superclass name in class file %s", CHECK_(nullHandle)); | |
| 2521 } | |
| 2522 } | |
| 2523 | |
| 2524 // Interfaces | |
| 2525 u2 itfs_len = cfs->get_u2_fast(); | |
| 2526 objArrayHandle local_interfaces; | |
| 2527 if (itfs_len == 0) { | |
| 2528 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2529 } else { | |
| 2530 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
| 2531 } | |
| 2532 | |
| 2533 // Fields (offsets are filled in later) | |
| 2534 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 2535 objArrayHandle fields_annotations; | |
| 2536 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 2537 // Methods | |
| 2538 bool has_final_method = false; | |
| 2539 AccessFlags promoted_flags; | |
| 2540 promoted_flags.set_flags(0); | |
| 2541 // These need to be oop pointers because they are allocated lazily | |
| 2542 // inside parse_methods inside a nested HandleMark | |
| 2543 objArrayOop methods_annotations_oop = NULL; | |
| 2544 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 2545 objArrayOop methods_default_annotations_oop = NULL; | |
| 2546 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 2547 &promoted_flags, | |
| 2548 &has_final_method, | |
| 2549 &methods_annotations_oop, | |
| 2550 &methods_parameter_annotations_oop, | |
| 2551 &methods_default_annotations_oop, | |
| 2552 CHECK_(nullHandle)); | |
| 2553 | |
| 2554 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 2555 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 2556 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 2557 | |
| 2558 // We check super class after class file is parsed and format is checked | |
| 2559 if (super_class_index > 0) { | |
| 2560 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); | |
| 2561 if (access_flags.is_interface()) { | |
| 2562 // Before attempting to resolve the superclass, check for class format | |
| 2563 // errors not checked yet. | |
| 2564 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
| 2565 "Interfaces must have java.lang.Object as superclass in class file %s", | |
| 2566 CHECK_(nullHandle)); | |
| 2567 } | |
| 2568 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 2569 sk, | |
| 2570 class_loader, | |
| 2571 protection_domain, | |
| 2572 true, | |
| 2573 CHECK_(nullHandle)); | |
| 2574 KlassHandle kh (THREAD, k); | |
| 2575 super_klass = instanceKlassHandle(THREAD, kh()); | |
| 2576 if (super_klass->is_interface()) { | |
| 2577 ResourceMark rm(THREAD); | |
| 2578 Exceptions::fthrow( | |
| 2579 THREAD_AND_LOCATION, | |
| 2580 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
| 2581 "class %s has interface %s as super class", | |
| 2582 class_name->as_klass_external_name(), | |
| 2583 super_klass->external_name() | |
| 2584 ); | |
| 2585 return nullHandle; | |
| 2586 } | |
| 2587 // Make sure super class is not final | |
| 2588 if (super_klass->is_final()) { | |
| 2589 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 2590 } | |
| 2591 } | |
| 2592 | |
| 2593 // Compute the transitive list of all unique interfaces implemented by this class | |
| 2594 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 2595 | |
| 2596 // sort methods | |
| 2597 typeArrayHandle method_ordering = sort_methods(methods, | |
| 2598 methods_annotations, | |
| 2599 methods_parameter_annotations, | |
| 2600 methods_default_annotations, | |
| 2601 CHECK_(nullHandle)); | |
| 2602 | |
| 2603 // promote flags from parse_methods() to the klass' flags | |
| 2604 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 2605 | |
| 2606 // Size of Java vtable (in words) | |
| 2607 int vtable_size = 0; | |
| 2608 int itable_size = 0; | |
| 2609 int num_miranda_methods = 0; | |
| 2610 | |
| 2611 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 2612 num_miranda_methods, | |
| 2613 super_klass(), | |
| 2614 methods(), | |
| 2615 access_flags, | |
| 2616 class_loader(), | |
| 2617 class_name(), | |
| 2618 local_interfaces()); | |
| 2619 | |
| 2620 // Size of Java itable (in words) | |
| 2621 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 2622 | |
| 2623 // Field size and offset computation | |
| 2624 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 2625 #ifndef PRODUCT | |
| 2626 int orig_nonstatic_field_size = 0; | |
| 2627 #endif | |
| 2628 int static_field_size = 0; | |
| 2629 int next_static_oop_offset; | |
| 2630 int next_static_double_offset; | |
| 2631 int next_static_word_offset; | |
| 2632 int next_static_short_offset; | |
| 2633 int next_static_byte_offset; | |
| 2634 int next_static_type_offset; | |
| 2635 int next_nonstatic_oop_offset; | |
| 2636 int next_nonstatic_double_offset; | |
| 2637 int next_nonstatic_word_offset; | |
| 2638 int next_nonstatic_short_offset; | |
| 2639 int next_nonstatic_byte_offset; | |
| 2640 int next_nonstatic_type_offset; | |
| 2641 int first_nonstatic_oop_offset; | |
| 2642 int first_nonstatic_field_offset; | |
| 2643 int next_nonstatic_field_offset; | |
| 2644 | |
| 2645 // Calculate the starting byte offsets | |
| 2646 next_static_oop_offset = (instanceKlass::header_size() + | |
| 2647 align_object_offset(vtable_size) + | |
| 2648 align_object_offset(itable_size)) * wordSize; | |
| 2649 next_static_double_offset = next_static_oop_offset + | |
| 2650 (fac.static_oop_count * oopSize); | |
| 2651 if ( fac.static_double_count && | |
| 2652 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 2653 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 2654 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 2655 } | |
| 2656 | |
| 2657 next_static_word_offset = next_static_double_offset + | |
| 2658 (fac.static_double_count * BytesPerLong); | |
| 2659 next_static_short_offset = next_static_word_offset + | |
| 2660 (fac.static_word_count * BytesPerInt); | |
| 2661 next_static_byte_offset = next_static_short_offset + | |
| 2662 (fac.static_short_count * BytesPerShort); | |
| 2663 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 2664 fac.static_byte_count ), wordSize ); | |
| 2665 static_field_size = (next_static_type_offset - | |
| 2666 next_static_oop_offset) / wordSize; | |
| 2667 first_nonstatic_field_offset = (instanceOopDesc::header_size() + | |
| 2668 nonstatic_field_size) * wordSize; | |
| 2669 next_nonstatic_field_offset = first_nonstatic_field_offset; | |
| 2670 | |
| 2671 // Add fake fields for java.lang.Class instances (also see below) | |
| 2672 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2673 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
| 2674 } | |
| 2675 | |
| 2676 // Add a fake "discovered" field if it is not present | |
| 2677 // for compatibility with earlier jdk's. | |
| 2678 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
| 2679 && class_loader.is_null()) { | |
| 2680 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 2681 } | |
| 2682 // end of "discovered" field compactibility fix | |
| 2683 | |
| 2684 int nonstatic_double_count = fac.nonstatic_double_count; | |
| 2685 int nonstatic_word_count = fac.nonstatic_word_count; | |
| 2686 int nonstatic_short_count = fac.nonstatic_short_count; | |
| 2687 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
| 2688 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
| 2689 | |
| 2690 // Prepare list of oops for oop maps generation. | |
| 2691 u2* nonstatic_oop_offsets; | |
| 2692 u2* nonstatic_oop_length; | |
| 2693 int nonstatic_oop_map_count = 0; | |
| 2694 | |
| 2695 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2696 THREAD, u2, nonstatic_oop_count+1); | |
| 2697 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2698 THREAD, u2, nonstatic_oop_count+1); | |
| 2699 | |
| 2700 // Add fake fields for java.lang.Class instances (also see above). | |
| 2701 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
| 2702 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2703 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
| 2704 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
| 2705 int fake_oop_count = (( next_nonstatic_field_offset - | |
| 2706 first_nonstatic_field_offset ) / oopSize); | |
| 2707 nonstatic_oop_length [0] = (u2)fake_oop_count; | |
| 2708 nonstatic_oop_map_count = 1; | |
| 2709 nonstatic_oop_count -= fake_oop_count; | |
| 2710 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
| 2711 } else { | |
| 2712 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 2713 } | |
| 2714 | |
| 2715 #ifndef PRODUCT | |
| 2716 if( PrintCompactFieldsSavings ) { | |
| 2717 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
| 2718 (nonstatic_oop_count * oopSize); | |
| 2719 if ( nonstatic_double_count > 0 ) { | |
| 2720 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 2721 } | |
| 2722 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 2723 (nonstatic_double_count * BytesPerLong); | |
| 2724 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 2725 (nonstatic_word_count * BytesPerInt); | |
| 2726 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 2727 (nonstatic_short_count * BytesPerShort); | |
| 2728 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
| 2729 nonstatic_byte_count ), wordSize ); | |
| 2730 orig_nonstatic_field_size = nonstatic_field_size + | |
| 2731 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/wordSize); | |
| 2732 } | |
| 2733 #endif | |
| 2734 bool compact_fields = CompactFields; | |
| 2735 int allocation_style = FieldsAllocationStyle; | |
| 2736 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
| 2737 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
| 2738 allocation_style = 1; // Optimistic | |
| 2739 } | |
| 2740 | |
| 2741 // The next classes have predefined hard-coded fields offsets | |
| 2742 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 2743 // Use default fields allocation order for them. | |
| 2744 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
| 2745 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
| 2746 class_name() == vmSymbols::java_lang_Class() || | |
| 2747 class_name() == vmSymbols::java_lang_ClassLoader() || | |
| 2748 class_name() == vmSymbols::java_lang_ref_Reference() || | |
| 2749 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
| 2750 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
| 2751 class_name() == vmSymbols::java_lang_String() || | |
| 2752 class_name() == vmSymbols::java_lang_Throwable()) ) { | |
| 2753 allocation_style = 0; // Allocate oops first | |
| 2754 compact_fields = false; // Don't compact fields | |
| 2755 } | |
| 2756 | |
| 2757 if( allocation_style == 0 ) { | |
| 2758 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 2759 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 2760 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
| 2761 (nonstatic_oop_count * oopSize); | |
| 2762 } else if( allocation_style == 1 ) { | |
| 2763 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 2764 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
| 2765 } else { | |
| 2766 ShouldNotReachHere(); | |
| 2767 } | |
| 2768 | |
| 2769 int nonstatic_oop_space_count = 0; | |
| 2770 int nonstatic_word_space_count = 0; | |
| 2771 int nonstatic_short_space_count = 0; | |
| 2772 int nonstatic_byte_space_count = 0; | |
| 2773 int nonstatic_oop_space_offset; | |
| 2774 int nonstatic_word_space_offset; | |
| 2775 int nonstatic_short_space_offset; | |
| 2776 int nonstatic_byte_space_offset; | |
| 2777 | |
| 2778 if( nonstatic_double_count > 0 ) { | |
| 2779 int offset = next_nonstatic_double_offset; | |
| 2780 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); | |
| 2781 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 2782 // Allocate available fields into the gap before double field. | |
| 2783 int length = next_nonstatic_double_offset - offset; | |
| 2784 assert(length == BytesPerInt, ""); | |
| 2785 nonstatic_word_space_offset = offset; | |
| 2786 if( nonstatic_word_count > 0 ) { | |
| 2787 nonstatic_word_count -= 1; | |
| 2788 nonstatic_word_space_count = 1; // Only one will fit | |
| 2789 length -= BytesPerInt; | |
| 2790 offset += BytesPerInt; | |
| 2791 } | |
| 2792 nonstatic_short_space_offset = offset; | |
| 2793 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 2794 nonstatic_short_count -= 1; | |
| 2795 nonstatic_short_space_count += 1; | |
| 2796 length -= BytesPerShort; | |
| 2797 offset += BytesPerShort; | |
| 2798 } | |
| 2799 nonstatic_byte_space_offset = offset; | |
| 2800 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 2801 nonstatic_byte_count -= 1; | |
| 2802 nonstatic_byte_space_count += 1; | |
| 2803 length -= 1; | |
| 2804 } | |
| 2805 // Allocate oop field in the gap if there are no other fields for that. | |
| 2806 nonstatic_oop_space_offset = offset; | |
| 2807 if( length >= oopSize && nonstatic_oop_count > 0 && | |
| 2808 allocation_style != 0 ) { // when oop fields not first | |
| 2809 nonstatic_oop_count -= 1; | |
| 2810 nonstatic_oop_space_count = 1; // Only one will fit | |
| 2811 length -= oopSize; | |
| 2812 offset += oopSize; | |
| 2813 } | |
| 2814 } | |
| 2815 } | |
| 2816 | |
| 2817 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 2818 (nonstatic_double_count * BytesPerLong); | |
| 2819 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 2820 (nonstatic_word_count * BytesPerInt); | |
| 2821 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 2822 (nonstatic_short_count * BytesPerShort); | |
| 2823 | |
| 2824 int notaligned_offset; | |
| 2825 if( allocation_style == 0 ) { | |
| 2826 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 2827 } else { // allocation_style == 1 | |
| 2828 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 2829 if( nonstatic_oop_count > 0 ) { | |
| 2830 notaligned_offset = next_nonstatic_oop_offset; | |
| 2831 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, oopSize); | |
| 2832 } | |
| 2833 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * oopSize); | |
| 2834 } | |
| 2835 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); | |
| 2836 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset | |
| 2837 - first_nonstatic_field_offset)/wordSize); | |
| 2838 | |
| 2839 // Iterate over fields again and compute correct offsets. | |
| 2840 // The field allocation type was temporarily stored in the offset slot. | |
| 2841 // oop fields are located before non-oop fields (static and non-static). | |
| 2842 int len = fields->length(); | |
| 2843 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 2844 int real_offset; | |
| 2845 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
| 2846 switch (atype) { | |
| 2847 case STATIC_OOP: | |
| 2848 real_offset = next_static_oop_offset; | |
| 2849 next_static_oop_offset += oopSize; | |
| 2850 break; | |
| 2851 case STATIC_BYTE: | |
| 2852 real_offset = next_static_byte_offset; | |
| 2853 next_static_byte_offset += 1; | |
| 2854 break; | |
| 2855 case STATIC_SHORT: | |
| 2856 real_offset = next_static_short_offset; | |
| 2857 next_static_short_offset += BytesPerShort; | |
| 2858 break; | |
| 2859 case STATIC_WORD: | |
| 2860 real_offset = next_static_word_offset; | |
| 2861 next_static_word_offset += BytesPerInt; | |
| 2862 break; | |
| 2863 case STATIC_ALIGNED_DOUBLE: | |
| 2864 case STATIC_DOUBLE: | |
| 2865 real_offset = next_static_double_offset; | |
| 2866 next_static_double_offset += BytesPerLong; | |
| 2867 break; | |
| 2868 case NONSTATIC_OOP: | |
| 2869 if( nonstatic_oop_space_count > 0 ) { | |
| 2870 real_offset = nonstatic_oop_space_offset; | |
| 2871 nonstatic_oop_space_offset += oopSize; | |
| 2872 nonstatic_oop_space_count -= 1; | |
| 2873 } else { | |
| 2874 real_offset = next_nonstatic_oop_offset; | |
| 2875 next_nonstatic_oop_offset += oopSize; | |
| 2876 } | |
| 2877 // Update oop maps | |
| 2878 if( nonstatic_oop_map_count > 0 && | |
| 2879 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
| 2880 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * oopSize) ) { | |
| 2881 // Extend current oop map | |
| 2882 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
| 2883 } else { | |
| 2884 // Create new oop map | |
| 2885 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
| 2886 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
| 2887 nonstatic_oop_map_count += 1; | |
| 2888 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 2889 first_nonstatic_oop_offset = real_offset; | |
| 2890 } | |
| 2891 } | |
| 2892 break; | |
| 2893 case NONSTATIC_BYTE: | |
| 2894 if( nonstatic_byte_space_count > 0 ) { | |
| 2895 real_offset = nonstatic_byte_space_offset; | |
| 2896 nonstatic_byte_space_offset += 1; | |
| 2897 nonstatic_byte_space_count -= 1; | |
| 2898 } else { | |
| 2899 real_offset = next_nonstatic_byte_offset; | |
| 2900 next_nonstatic_byte_offset += 1; | |
| 2901 } | |
| 2902 break; | |
| 2903 case NONSTATIC_SHORT: | |
| 2904 if( nonstatic_short_space_count > 0 ) { | |
| 2905 real_offset = nonstatic_short_space_offset; | |
| 2906 nonstatic_short_space_offset += BytesPerShort; | |
| 2907 nonstatic_short_space_count -= 1; | |
| 2908 } else { | |
| 2909 real_offset = next_nonstatic_short_offset; | |
| 2910 next_nonstatic_short_offset += BytesPerShort; | |
| 2911 } | |
| 2912 break; | |
| 2913 case NONSTATIC_WORD: | |
| 2914 if( nonstatic_word_space_count > 0 ) { | |
| 2915 real_offset = nonstatic_word_space_offset; | |
| 2916 nonstatic_word_space_offset += BytesPerInt; | |
| 2917 nonstatic_word_space_count -= 1; | |
| 2918 } else { | |
| 2919 real_offset = next_nonstatic_word_offset; | |
| 2920 next_nonstatic_word_offset += BytesPerInt; | |
| 2921 } | |
| 2922 break; | |
| 2923 case NONSTATIC_ALIGNED_DOUBLE: | |
| 2924 case NONSTATIC_DOUBLE: | |
| 2925 real_offset = next_nonstatic_double_offset; | |
| 2926 next_nonstatic_double_offset += BytesPerLong; | |
| 2927 break; | |
| 2928 default: | |
| 2929 ShouldNotReachHere(); | |
| 2930 } | |
| 2931 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
| 2932 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
| 2933 } | |
| 2934 | |
| 2935 // Size of instances | |
| 2936 int instance_size; | |
| 2937 | |
| 2938 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); | |
| 2939 | |
| 2940 assert(instance_size == align_object_size(instanceOopDesc::header_size() + nonstatic_field_size), "consistent layout helper value"); | |
| 2941 | |
| 2942 // Size of non-static oop map blocks (in words) allocated at end of klass | |
| 2943 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
| 2944 | |
| 2945 // Compute reference type | |
| 2946 ReferenceType rt; | |
| 2947 if (super_klass() == NULL) { | |
| 2948 rt = REF_NONE; | |
| 2949 } else { | |
| 2950 rt = super_klass->reference_type(); | |
| 2951 } | |
| 2952 | |
| 2953 // We can now create the basic klassOop for this klass | |
| 2954 klassOop ik = oopFactory::new_instanceKlass( | |
| 2955 vtable_size, itable_size, | |
| 2956 static_field_size, nonstatic_oop_map_size, | |
| 2957 rt, CHECK_(nullHandle)); | |
| 2958 instanceKlassHandle this_klass (THREAD, ik); | |
| 2959 | |
| 2960 assert(this_klass->static_field_size() == static_field_size && | |
| 2961 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
| 2962 | |
| 2963 // Fill in information already parsed | |
| 2964 this_klass->set_access_flags(access_flags); | |
| 2965 jint lh = Klass::instance_layout_helper(instance_size, false); | |
| 2966 this_klass->set_layout_helper(lh); | |
| 2967 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 2968 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 2969 // Not yet: supers are done below to support the new subtype-checking fields | |
| 2970 //this_klass->set_super(super_klass()); | |
| 2971 this_klass->set_class_loader(class_loader()); | |
| 2972 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
| 2973 this_klass->set_static_oop_field_size(fac.static_oop_count); | |
| 2974 cp->set_pool_holder(this_klass()); | |
| 2975 this_klass->set_constants(cp()); | |
| 2976 this_klass->set_local_interfaces(local_interfaces()); | |
| 2977 this_klass->set_fields(fields()); | |
| 2978 this_klass->set_methods(methods()); | |
| 2979 if (has_final_method) { | |
| 2980 this_klass->set_has_final_method(); | |
| 2981 } | |
| 2982 this_klass->set_method_ordering(method_ordering()); | |
| 2983 this_klass->set_initial_method_idnum(methods->length()); | |
| 2984 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 2985 this_klass->set_protection_domain(protection_domain()); | |
| 2986 this_klass->set_fields_annotations(fields_annotations()); | |
| 2987 this_klass->set_methods_annotations(methods_annotations()); | |
| 2988 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 2989 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 2990 | |
| 2991 this_klass->set_minor_version(minor_version); | |
| 2992 this_klass->set_major_version(major_version); | |
| 2993 | |
| 2994 if (cached_class_file_bytes != NULL) { | |
| 2995 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 2996 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 2997 cached_class_file_length); | |
| 2998 } | |
| 2999 | |
| 3000 // Miranda methods | |
| 3001 if ((num_miranda_methods > 0) || | |
| 3002 // if this class introduced new miranda methods or | |
| 3003 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3004 // super class exists and this class inherited miranda methods | |
| 3005 ) { | |
| 3006 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3007 } | |
| 3008 | |
| 3009 // Additional attributes | |
| 3010 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3011 | |
| 3012 // Make sure this is the end of class file stream | |
| 3013 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3014 | |
| 3015 // Initialize static fields | |
| 3016 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3017 | |
| 3018 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3019 // Compute transitive closure of interfaces this class implements | |
| 3020 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3021 | |
| 3022 // Fill in information needed to compute superclasses. | |
| 3023 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3024 | |
| 3025 // Initialize itable offset tables | |
| 3026 klassItable::setup_itable_offset_table(this_klass); | |
| 3027 | |
| 3028 // Do final class setup | |
| 3029 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
| 3030 | |
| 3031 set_precomputed_flags(this_klass); | |
| 3032 | |
| 3033 // reinitialize modifiers, using the InnerClasses attribute | |
| 3034 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3035 this_klass->set_modifier_flags(computed_modifiers); | |
| 3036 | |
| 3037 // check if this class can access its super class | |
| 3038 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3039 | |
| 3040 // check if this class can access its superinterfaces | |
| 3041 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3042 | |
| 3043 // check if this class overrides any final method | |
| 3044 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3045 | |
| 3046 // check that if this class is an interface then it doesn't have static methods | |
| 3047 if (this_klass->is_interface()) { | |
| 3048 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3049 } | |
| 3050 | |
| 3051 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3052 false /* not shared class */); | |
| 3053 | |
| 3054 if (TraceClassLoading) { | |
| 3055 // print in a single call to reduce interleaving of output | |
| 3056 if (cfs->source() != NULL) { | |
| 3057 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3058 cfs->source()); | |
| 3059 } else if (class_loader.is_null()) { | |
| 3060 if (THREAD->is_Java_thread()) { | |
| 3061 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3062 tty->print("[Loaded %s by instance of %s]\n", | |
| 3063 this_klass->external_name(), | |
| 3064 instanceKlass::cast(caller)->external_name()); | |
| 3065 } else { | |
| 3066 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3067 } | |
| 3068 } else { | |
| 3069 ResourceMark rm; | |
| 3070 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3071 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3072 } | |
| 3073 } | |
| 3074 | |
| 3075 if (TraceClassResolution) { | |
| 3076 // print out the superclass. | |
| 3077 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3078 if (this_klass->java_super() != NULL) { | |
| 3079 tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); | |
| 3080 } | |
| 3081 // print out each of the interface classes referred to by this class. | |
| 3082 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3083 if (!local_interfaces.is_null()) { | |
| 3084 int length = local_interfaces->length(); | |
| 3085 for (int i = 0; i < length; i++) { | |
| 3086 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3087 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3088 const char * to = to_class->external_name(); | |
| 3089 tty->print("RESOLVE %s %s\n", from, to); | |
| 3090 } | |
| 3091 } | |
| 3092 } | |
| 3093 | |
| 3094 #ifndef PRODUCT | |
| 3095 if( PrintCompactFieldsSavings ) { | |
| 3096 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
| 3097 tty->print("[Saved %d of %3d words in %s]\n", | |
| 3098 orig_nonstatic_field_size - nonstatic_field_size, | |
| 3099 orig_nonstatic_field_size, this_klass->external_name()); | |
| 3100 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { | |
| 3101 tty->print("[Wasted %d over %3d words in %s]\n", | |
| 3102 nonstatic_field_size - orig_nonstatic_field_size, | |
| 3103 orig_nonstatic_field_size, this_klass->external_name()); | |
| 3104 } | |
| 3105 } | |
| 3106 #endif | |
| 3107 | |
| 3108 // preserve result across HandleMark | |
| 3109 preserve_this_klass = this_klass(); | |
| 3110 } | |
| 3111 | |
| 3112 // Create new handle outside HandleMark | |
| 3113 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3114 debug_only(this_klass->as_klassOop()->verify();) | |
| 3115 | |
| 3116 return this_klass; | |
| 3117 } | |
| 3118 | |
| 3119 | |
| 3120 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
| 3121 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
| 3122 if (nonstatic_oop_map_count > 0) { | |
| 3123 // We have oops to add to map | |
| 3124 if (map_size == 0) { | |
| 3125 map_size = nonstatic_oop_map_count; | |
| 3126 } else { | |
| 3127 // Check whether we should add a new map block or whether the last one can be extended | |
| 3128 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
| 3129 OopMapBlock* last_map = first_map + map_size - 1; | |
| 3130 | |
| 3131 int next_offset = last_map->offset() + (last_map->length() * oopSize); | |
| 3132 if (next_offset == first_nonstatic_oop_offset) { | |
| 3133 // There is no gap bettwen superklass's last oop field and first | |
| 3134 // local oop field, merge maps. | |
| 3135 nonstatic_oop_map_count -= 1; | |
| 3136 } else { | |
| 3137 // Superklass didn't end with a oop field, add extra maps | |
| 3138 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
| 3139 } | |
| 3140 map_size += nonstatic_oop_map_count; | |
| 3141 } | |
| 3142 } | |
| 3143 return map_size; | |
| 3144 } | |
| 3145 | |
| 3146 | |
| 3147 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
| 3148 int nonstatic_oop_map_count, | |
| 3149 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
| 3150 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
| 3151 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
| 3152 instanceKlass* super = k->superklass(); | |
| 3153 if (super != NULL) { | |
| 3154 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
| 3155 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
| 3156 // Copy maps from superklass | |
| 3157 while (super_oop_map_size-- > 0) { | |
| 3158 *this_oop_map++ = *super_oop_map++; | |
| 3159 } | |
| 3160 } | |
| 3161 if (nonstatic_oop_map_count > 0) { | |
| 3162 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
| 3163 // Calculated in compute_oop_map_size() number of oop maps is less then | |
| 3164 // collected oop maps since there is no gap between superklass's last oop | |
| 3165 // field and first local oop field. Extend the last oop map copied | |
| 3166 // from the superklass instead of creating new one. | |
| 3167 nonstatic_oop_map_count--; | |
| 3168 nonstatic_oop_offsets++; | |
| 3169 this_oop_map--; | |
| 3170 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
| 3171 this_oop_map++; | |
| 3172 } | |
| 3173 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
| 3174 // Add new map blocks, fill them | |
| 3175 while (nonstatic_oop_map_count-- > 0) { | |
| 3176 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 3177 this_oop_map->set_length(*nonstatic_oop_length++); | |
| 3178 this_oop_map++; | |
| 3179 } | |
| 3180 } | |
| 3181 } | |
| 3182 | |
| 3183 | |
| 3184 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3185 klassOop super = k->super(); | |
| 3186 | |
| 3187 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3188 // in which case we don't have to register objects as finalizable | |
| 3189 if (!_has_empty_finalizer) { | |
| 3190 if (_has_finalizer || | |
| 3191 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3192 k->set_has_finalizer(); | |
| 3193 } | |
| 3194 } | |
| 3195 | |
| 3196 #ifdef ASSERT | |
| 3197 bool f = false; | |
| 3198 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3199 vmSymbols::void_method_signature()); | |
| 3200 if (m != NULL && !m->is_empty_method()) { | |
| 3201 f = true; | |
| 3202 } | |
| 3203 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3204 #endif | |
| 3205 | |
| 3206 // Check if this klass supports the java.lang.Cloneable interface | |
| 3207 if (SystemDictionary::cloneable_klass_loaded()) { | |
| 3208 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
| 3209 k->set_is_cloneable(); | |
| 3210 } | |
| 3211 } | |
| 3212 | |
| 3213 // Check if this klass has a vanilla default constructor | |
| 3214 if (super == NULL) { | |
| 3215 // java.lang.Object has empty default constructor | |
| 3216 k->set_has_vanilla_constructor(); | |
| 3217 } else { | |
| 3218 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3219 _has_vanilla_constructor) { | |
| 3220 k->set_has_vanilla_constructor(); | |
| 3221 } | |
| 3222 #ifdef ASSERT | |
| 3223 bool v = false; | |
| 3224 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3225 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3226 ), vmSymbols::void_method_signature()); | |
| 3227 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3228 v = true; | |
| 3229 } | |
| 3230 } | |
| 3231 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3232 #endif | |
| 3233 } | |
| 3234 | |
| 3235 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3236 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3237 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3238 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3239 || k->is_abstract() || k->is_interface() | |
| 3240 || (k->name() == vmSymbols::java_lang_Class() | |
| 3241 && k->class_loader() == NULL) | |
| 3242 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3243 // Forbid fast-path allocation. | |
| 3244 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3245 k->set_layout_helper(lh); | |
| 3246 } | |
| 3247 } | |
| 3248 | |
| 3249 | |
| 3250 // utility method for appending and array with check for duplicates | |
| 3251 | |
| 3252 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3253 // iterate over new interfaces | |
| 3254 for (int i = 0; i < ifs->length(); i++) { | |
| 3255 oop e = ifs->obj_at(i); | |
| 3256 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3257 // check for duplicates | |
| 3258 bool duplicate = false; | |
| 3259 for (int j = 0; j < index; j++) { | |
| 3260 if (result->obj_at(j) == e) { | |
| 3261 duplicate = true; | |
| 3262 break; | |
| 3263 } | |
| 3264 } | |
| 3265 // add new interface | |
| 3266 if (!duplicate) { | |
| 3267 result->obj_at_put(index++, e); | |
| 3268 } | |
| 3269 } | |
| 3270 } | |
| 3271 | |
| 3272 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3273 // Compute maximum size for transitive interfaces | |
| 3274 int max_transitive_size = 0; | |
| 3275 int super_size = 0; | |
| 3276 // Add superclass transitive interfaces size | |
| 3277 if (super.not_null()) { | |
| 3278 super_size = super->transitive_interfaces()->length(); | |
| 3279 max_transitive_size += super_size; | |
| 3280 } | |
| 3281 // Add local interfaces' super interfaces | |
| 3282 int local_size = local_ifs->length(); | |
| 3283 for (int i = 0; i < local_size; i++) { | |
| 3284 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3285 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3286 } | |
| 3287 // Finally add local interfaces | |
| 3288 max_transitive_size += local_size; | |
| 3289 // Construct array | |
| 3290 objArrayHandle result; | |
| 3291 if (max_transitive_size == 0) { | |
| 3292 // no interfaces, use canonicalized array | |
| 3293 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3294 } else if (max_transitive_size == super_size) { | |
| 3295 // no new local interfaces added, share superklass' transitive interface array | |
| 3296 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3297 } else if (max_transitive_size == local_size) { | |
| 3298 // only local interfaces added, share local interface array | |
| 3299 result = local_ifs; | |
| 3300 } else { | |
| 3301 objArrayHandle nullHandle; | |
| 3302 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3303 result = objArrayHandle(THREAD, new_objarray); | |
| 3304 int index = 0; | |
| 3305 // Copy down from superclass | |
| 3306 if (super.not_null()) { | |
| 3307 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3308 } | |
| 3309 // Copy down from local interfaces' superinterfaces | |
| 3310 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3311 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3312 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3313 } | |
| 3314 // Finally add local interfaces | |
| 3315 append_interfaces(result, index, local_ifs()); | |
| 3316 | |
| 3317 // Check if duplicates were removed | |
| 3318 if (index != max_transitive_size) { | |
| 3319 assert(index < max_transitive_size, "just checking"); | |
| 3320 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3321 for (int i = 0; i < index; i++) { | |
| 3322 oop e = result->obj_at(i); | |
| 3323 assert(e != NULL, "just checking"); | |
| 3324 new_result->obj_at_put(i, e); | |
| 3325 } | |
| 3326 result = objArrayHandle(THREAD, new_result); | |
| 3327 } | |
| 3328 } | |
| 3329 return result; | |
| 3330 } | |
| 3331 | |
| 3332 | |
| 3333 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3334 klassOop super = this_klass->super(); | |
| 3335 if ((super != NULL) && | |
| 3336 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3337 ResourceMark rm(THREAD); | |
| 3338 Exceptions::fthrow( | |
| 3339 THREAD_AND_LOCATION, | |
| 3340 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3341 "class %s cannot access its superclass %s", | |
| 3342 this_klass->external_name(), | |
| 3343 instanceKlass::cast(super)->external_name() | |
| 3344 ); | |
| 3345 return; | |
| 3346 } | |
| 3347 } | |
| 3348 | |
| 3349 | |
| 3350 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3351 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3352 int lng = local_interfaces->length(); | |
| 3353 for (int i = lng - 1; i >= 0; i--) { | |
| 3354 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3355 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3356 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3357 ResourceMark rm(THREAD); | |
| 3358 Exceptions::fthrow( | |
| 3359 THREAD_AND_LOCATION, | |
| 3360 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3361 "class %s cannot access its superinterface %s", | |
| 3362 this_klass->external_name(), | |
| 3363 instanceKlass::cast(k)->external_name() | |
| 3364 ); | |
| 3365 return; | |
| 3366 } | |
| 3367 } | |
| 3368 } | |
| 3369 | |
| 3370 | |
| 3371 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3372 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3373 int num_methods = methods->length(); | |
| 3374 | |
| 3375 // go thru each method and check if it overrides a final method | |
| 3376 for (int index = 0; index < num_methods; index++) { | |
| 3377 methodOop m = (methodOop)methods->obj_at(index); | |
| 3378 | |
| 3379 // skip private, static and <init> methods | |
| 3380 if ((!m->is_private()) && | |
| 3381 (!m->is_static()) && | |
| 3382 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3383 | |
| 3384 symbolOop name = m->name(); | |
| 3385 symbolOop signature = m->signature(); | |
| 3386 klassOop k = this_klass->super(); | |
| 3387 methodOop super_m = NULL; | |
| 3388 while (k != NULL) { | |
| 3389 // skip supers that don't have final methods. | |
| 3390 if (k->klass_part()->has_final_method()) { | |
| 3391 // lookup a matching method in the super class hierarchy | |
| 3392 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3393 if (super_m == NULL) { | |
| 3394 break; // didn't find any match; get out | |
| 3395 } | |
| 3396 | |
| 3397 if (super_m->is_final() && | |
| 3398 // matching method in super is final | |
| 3399 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 3400 super_m->method_holder(), | |
| 3401 super_m->method_holder(), | |
| 3402 super_m->access_flags(), false)) | |
| 3403 // this class can access super final method and therefore override | |
| 3404 ) { | |
| 3405 ResourceMark rm(THREAD); | |
| 3406 Exceptions::fthrow( | |
| 3407 THREAD_AND_LOCATION, | |
| 3408 vmSymbolHandles::java_lang_VerifyError(), | |
| 3409 "class %s overrides final method %s.%s", | |
| 3410 this_klass->external_name(), | |
| 3411 name->as_C_string(), | |
| 3412 signature->as_C_string() | |
| 3413 ); | |
| 3414 return; | |
| 3415 } | |
| 3416 | |
| 3417 // continue to look from super_m's holder's super. | |
| 3418 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 3419 continue; | |
| 3420 } | |
| 3421 | |
| 3422 k = k->klass_part()->super(); | |
| 3423 } | |
| 3424 } | |
| 3425 } | |
| 3426 } | |
| 3427 | |
| 3428 | |
| 3429 // assumes that this_klass is an interface | |
| 3430 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 3431 assert(this_klass->is_interface(), "not an interface"); | |
| 3432 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3433 int num_methods = methods->length(); | |
| 3434 | |
| 3435 for (int index = 0; index < num_methods; index++) { | |
| 3436 methodOop m = (methodOop)methods->obj_at(index); | |
| 3437 // if m is static and not the init method, throw a verify error | |
| 3438 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 3439 ResourceMark rm(THREAD); | |
| 3440 Exceptions::fthrow( | |
| 3441 THREAD_AND_LOCATION, | |
| 3442 vmSymbolHandles::java_lang_VerifyError(), | |
| 3443 "Illegal static method %s in interface %s", | |
| 3444 m->name()->as_C_string(), | |
| 3445 this_klass->external_name() | |
| 3446 ); | |
| 3447 return; | |
| 3448 } | |
| 3449 } | |
| 3450 } | |
| 3451 | |
| 3452 // utility methods for format checking | |
| 3453 | |
| 3454 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 3455 if (!_need_verify) { return; } | |
| 3456 | |
| 3457 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 3458 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3459 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3460 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 3461 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3462 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 3463 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3464 | |
| 3465 if ((is_abstract && is_final) || | |
| 3466 (is_interface && !is_abstract) || | |
| 3467 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 3468 (!is_interface && major_gte_15 && is_annotation)) { | |
| 3469 ResourceMark rm(THREAD); | |
| 3470 Exceptions::fthrow( | |
| 3471 THREAD_AND_LOCATION, | |
| 3472 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3473 "Illegal class modifiers in class %s: 0x%X", | |
| 3474 _class_name->as_C_string(), flags | |
| 3475 ); | |
| 3476 return; | |
| 3477 } | |
| 3478 } | |
| 3479 | |
| 3480 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 3481 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3482 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3483 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3484 | |
| 3485 return ((is_public && is_protected) || | |
| 3486 (is_public && is_private) || | |
| 3487 (is_protected && is_private)); | |
| 3488 } | |
| 3489 | |
| 3490 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
| 3491 return (major >= JAVA_MIN_SUPPORTED_VERSION) && | |
| 3492 (major <= JAVA_MAX_SUPPORTED_VERSION) && | |
| 3493 ((major != JAVA_MAX_SUPPORTED_VERSION) || | |
| 3494 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); | |
| 3495 } | |
| 3496 | |
| 3497 void ClassFileParser::verify_legal_field_modifiers( | |
| 3498 jint flags, bool is_interface, TRAPS) { | |
| 3499 if (!_need_verify) { return; } | |
| 3500 | |
| 3501 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3502 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3503 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3504 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3505 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3506 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 3507 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 3508 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3509 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3510 | |
| 3511 bool is_illegal = false; | |
| 3512 | |
| 3513 if (is_interface) { | |
| 3514 if (!is_public || !is_static || !is_final || is_private || | |
| 3515 is_protected || is_volatile || is_transient || | |
| 3516 (major_gte_15 && is_enum)) { | |
| 3517 is_illegal = true; | |
| 3518 } | |
| 3519 } else { // not interface | |
| 3520 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 3521 is_illegal = true; | |
| 3522 } | |
| 3523 } | |
| 3524 | |
| 3525 if (is_illegal) { | |
| 3526 ResourceMark rm(THREAD); | |
| 3527 Exceptions::fthrow( | |
| 3528 THREAD_AND_LOCATION, | |
| 3529 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3530 "Illegal field modifiers in class %s: 0x%X", | |
| 3531 _class_name->as_C_string(), flags); | |
| 3532 return; | |
| 3533 } | |
| 3534 } | |
| 3535 | |
| 3536 void ClassFileParser::verify_legal_method_modifiers( | |
| 3537 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
| 3538 if (!_need_verify) { return; } | |
| 3539 | |
| 3540 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3541 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3542 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3543 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3544 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 3545 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3546 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 3547 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 3548 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 3549 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3550 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 3551 | |
| 3552 bool is_illegal = false; | |
| 3553 | |
| 3554 if (is_interface) { | |
| 3555 if (!is_abstract || !is_public || is_static || is_final || | |
| 3556 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 3557 is_illegal = true; | |
| 3558 } | |
| 3559 } else { // not interface | |
| 3560 if (is_initializer) { | |
| 3561 if (is_static || is_final || is_synchronized || is_native || | |
| 3562 is_abstract || (major_gte_15 && is_bridge)) { | |
| 3563 is_illegal = true; | |
| 3564 } | |
| 3565 } else { // not initializer | |
| 3566 if (is_abstract) { | |
| 3567 if ((is_final || is_native || is_private || is_static || | |
| 3568 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 3569 is_illegal = true; | |
| 3570 } | |
| 3571 } | |
| 3572 if (has_illegal_visibility(flags)) { | |
| 3573 is_illegal = true; | |
| 3574 } | |
| 3575 } | |
| 3576 } | |
| 3577 | |
| 3578 if (is_illegal) { | |
| 3579 ResourceMark rm(THREAD); | |
| 3580 Exceptions::fthrow( | |
| 3581 THREAD_AND_LOCATION, | |
| 3582 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3583 "Method %s in class %s has illegal modifiers: 0x%X", | |
| 3584 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 3585 return; | |
| 3586 } | |
| 3587 } | |
| 3588 | |
| 3589 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 3590 assert(_need_verify, "only called when _need_verify is true"); | |
| 3591 int i = 0; | |
| 3592 int count = length >> 2; | |
| 3593 for (int k=0; k<count; k++) { | |
| 3594 unsigned char b0 = buffer[i]; | |
| 3595 unsigned char b1 = buffer[i+1]; | |
| 3596 unsigned char b2 = buffer[i+2]; | |
| 3597 unsigned char b3 = buffer[i+3]; | |
| 3598 // For an unsigned char v, | |
| 3599 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 3600 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 3601 unsigned char res = b0 | b0 - 1 | | |
| 3602 b1 | b1 - 1 | | |
| 3603 b2 | b2 - 1 | | |
| 3604 b3 | b3 - 1; | |
| 3605 if (res >= 128) break; | |
| 3606 i += 4; | |
| 3607 } | |
| 3608 for(; i < length; i++) { | |
| 3609 unsigned short c; | |
| 3610 // no embedded zeros | |
| 3611 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3612 if(buffer[i] < 128) { | |
| 3613 continue; | |
| 3614 } | |
| 3615 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 3616 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 3617 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 3618 i += 5; | |
| 3619 continue; | |
| 3620 } | |
| 3621 } | |
| 3622 switch (buffer[i] >> 4) { | |
| 3623 default: break; | |
| 3624 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 3625 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3626 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 3627 c = (buffer[i] & 0x1F) << 6; | |
| 3628 i++; | |
| 3629 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3630 c += buffer[i] & 0x3F; | |
| 3631 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 3632 // for classes with major > 47, c must a null or a character in its shortest form | |
| 3633 break; | |
| 3634 } | |
| 3635 } | |
| 3636 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3637 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 3638 c = (buffer[i] & 0xF) << 12; | |
| 3639 i += 2; | |
| 3640 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3641 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 3642 if (_major_version <= 47 || c >= 0x800) { | |
| 3643 // for classes with major > 47, c must be in its shortest form | |
| 3644 break; | |
| 3645 } | |
| 3646 } | |
| 3647 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3648 } // end of switch | |
| 3649 } // end of for | |
| 3650 } | |
| 3651 | |
| 3652 // Checks if name is a legal class name. | |
| 3653 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
| 3654 if (!_need_verify || _relax_verify) { return; } | |
| 3655 | |
| 3656 char buf[fixed_buffer_size]; | |
| 3657 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3658 unsigned int length = name->utf8_length(); | |
| 3659 bool legal = false; | |
| 3660 | |
| 3661 if (length > 0) { | |
| 3662 char* p; | |
| 3663 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 3664 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 3665 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3666 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3667 if (bytes[0] != '<') { | |
| 3668 p = skip_over_field_name(bytes, true, length); | |
| 3669 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3670 } | |
| 3671 } else { | |
| 3672 // 4900761: relax the constraints based on JSR202 spec | |
| 3673 // Class names may be drawn from the entire Unicode character set. | |
| 3674 // Identifiers between '/' must be unqualified names. | |
| 3675 // The utf8 string has been verified when parsing cpool entries. | |
| 3676 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 3677 } | |
| 3678 } | |
| 3679 if (!legal) { | |
| 3680 ResourceMark rm(THREAD); | |
| 3681 Exceptions::fthrow( | |
| 3682 THREAD_AND_LOCATION, | |
| 3683 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3684 "Illegal class name \"%s\" in class file %s", bytes, | |
| 3685 _class_name->as_C_string() | |
| 3686 ); | |
| 3687 return; | |
| 3688 } | |
| 3689 } | |
| 3690 | |
| 3691 // Checks if name is a legal field name. | |
| 3692 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
| 3693 if (!_need_verify || _relax_verify) { return; } | |
| 3694 | |
| 3695 char buf[fixed_buffer_size]; | |
| 3696 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3697 unsigned int length = name->utf8_length(); | |
| 3698 bool legal = false; | |
| 3699 | |
| 3700 if (length > 0) { | |
| 3701 if (_major_version < JAVA_1_5_VERSION) { | |
| 3702 if (bytes[0] != '<') { | |
| 3703 char* p = skip_over_field_name(bytes, false, length); | |
| 3704 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3705 } | |
| 3706 } else { | |
| 3707 // 4881221: relax the constraints based on JSR202 spec | |
| 3708 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 3709 } | |
| 3710 } | |
| 3711 | |
| 3712 if (!legal) { | |
| 3713 ResourceMark rm(THREAD); | |
| 3714 Exceptions::fthrow( | |
| 3715 THREAD_AND_LOCATION, | |
| 3716 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3717 "Illegal field name \"%s\" in class %s", bytes, | |
| 3718 _class_name->as_C_string() | |
| 3719 ); | |
| 3720 return; | |
| 3721 } | |
| 3722 } | |
| 3723 | |
| 3724 // Checks if name is a legal method name. | |
| 3725 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
| 3726 if (!_need_verify || _relax_verify) { return; } | |
| 3727 | |
| 3728 assert(!name.is_null(), "method name is null"); | |
| 3729 char buf[fixed_buffer_size]; | |
| 3730 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3731 unsigned int length = name->utf8_length(); | |
| 3732 bool legal = false; | |
| 3733 | |
| 3734 if (length > 0) { | |
| 3735 if (bytes[0] == '<') { | |
| 3736 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 3737 legal = true; | |
| 3738 } | |
| 3739 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3740 char* p; | |
| 3741 p = skip_over_field_name(bytes, false, length); | |
| 3742 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3743 } else { | |
| 3744 // 4881221: relax the constraints based on JSR202 spec | |
| 3745 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 3746 } | |
| 3747 } | |
| 3748 | |
| 3749 if (!legal) { | |
| 3750 ResourceMark rm(THREAD); | |
| 3751 Exceptions::fthrow( | |
| 3752 THREAD_AND_LOCATION, | |
| 3753 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3754 "Illegal method name \"%s\" in class %s", bytes, | |
| 3755 _class_name->as_C_string() | |
| 3756 ); | |
| 3757 return; | |
| 3758 } | |
| 3759 } | |
| 3760 | |
| 3761 | |
| 3762 // Checks if signature is a legal field signature. | |
| 3763 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 3764 if (!_need_verify) { return; } | |
| 3765 | |
| 3766 char buf[fixed_buffer_size]; | |
| 3767 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3768 unsigned int length = signature->utf8_length(); | |
| 3769 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 3770 | |
| 3771 if (p == NULL || (p - bytes) != (int)length) { | |
| 3772 ResourceMark rm(THREAD); | |
| 3773 Exceptions::fthrow( | |
| 3774 THREAD_AND_LOCATION, | |
| 3775 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3776 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
| 3777 name->as_C_string(), _class_name->as_C_string(), bytes | |
| 3778 ); | |
| 3779 return; | |
| 3780 } | |
| 3781 } | |
| 3782 | |
| 3783 // Checks if signature is a legal method signature. | |
| 3784 // Returns number of parameters | |
| 3785 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 3786 if (!_need_verify) { | |
| 3787 // make sure caller's args_size will be less than 0 even for non-static | |
| 3788 // method so it will be recomputed in compute_size_of_parameters(). | |
| 3789 return -2; | |
| 3790 } | |
| 3791 | |
| 3792 unsigned int args_size = 0; | |
| 3793 char buf[fixed_buffer_size]; | |
| 3794 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3795 unsigned int length = signature->utf8_length(); | |
| 3796 char* nextp; | |
| 3797 | |
| 3798 // The first character must be a '(' | |
| 3799 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 3800 length--; | |
| 3801 // Skip over legal field signatures | |
| 3802 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 3803 while ((length > 0) && (nextp != NULL)) { | |
| 3804 args_size++; | |
| 3805 if (p[0] == 'J' || p[0] == 'D') { | |
| 3806 args_size++; | |
| 3807 } | |
| 3808 length -= nextp - p; | |
| 3809 p = nextp; | |
| 3810 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 3811 } | |
| 3812 // The first non-signature thing better be a ')' | |
| 3813 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 3814 length--; | |
| 3815 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 3816 // All internal methods must return void | |
| 3817 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 3818 return args_size; | |
| 3819 } | |
| 3820 } else { | |
| 3821 // Now we better just have a return value | |
| 3822 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 3823 if (nextp && ((int)length == (nextp - p))) { | |
| 3824 return args_size; | |
| 3825 } | |
| 3826 } | |
| 3827 } | |
| 3828 } | |
| 3829 // Report error | |
| 3830 ResourceMark rm(THREAD); | |
| 3831 Exceptions::fthrow( | |
| 3832 THREAD_AND_LOCATION, | |
| 3833 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3834 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
| 3835 name->as_C_string(), _class_name->as_C_string(), p | |
| 3836 ); | |
| 3837 return 0; | |
| 3838 } | |
| 3839 | |
| 3840 | |
| 3841 // Unqualified names may not contain the characters '.', ';', or '/'. | |
| 3842 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
| 3843 // Note that method names may not be <init> or <clinit> in this method. | |
| 3844 // Because these names have been checked as special cases before calling this method | |
| 3845 // in verify_legal_method_name. | |
| 3846 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
| 3847 jchar ch; | |
| 3848 | |
| 3849 for (char* p = name; p != name + length; ) { | |
| 3850 ch = *p; | |
| 3851 if (ch < 128) { | |
| 3852 p++; | |
| 3853 if (ch == '.' || ch == ';') { | |
| 3854 return false; // do not permit '.' or ';' | |
| 3855 } | |
| 3856 if (type != LegalClass && ch == '/') { | |
| 3857 return false; // do not permit '/' unless it's class name | |
| 3858 } | |
| 3859 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 3860 return false; // do not permit '<' or '>' in method names | |
| 3861 } | |
| 3862 } else { | |
| 3863 char* tmp_p = UTF8::next(p, &ch); | |
| 3864 p = tmp_p; | |
| 3865 } | |
| 3866 } | |
| 3867 return true; | |
| 3868 } | |
| 3869 | |
| 3870 | |
| 3871 // Take pointer to a string. Skip over the longest part of the string that could | |
| 3872 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 3873 // Return a pointer to just past the fieldname. | |
| 3874 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 3875 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 3876 // qualified path but found something that was badly-formed). | |
| 3877 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 3878 char* p; | |
| 3879 jchar ch; | |
| 3880 jboolean last_is_slash = false; | |
| 3881 jboolean not_first_ch = false; | |
| 3882 | |
| 3883 for (p = name; p != name + length; not_first_ch = true) { | |
| 3884 char* old_p = p; | |
| 3885 ch = *p; | |
| 3886 if (ch < 128) { | |
| 3887 p++; | |
| 3888 // quick check for ascii | |
| 3889 if ((ch >= 'a' && ch <= 'z') || | |
| 3890 (ch >= 'A' && ch <= 'Z') || | |
| 3891 (ch == '_' || ch == '$') || | |
| 3892 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 3893 last_is_slash = false; | |
| 3894 continue; | |
| 3895 } | |
| 3896 if (slash_ok && ch == '/') { | |
| 3897 if (last_is_slash) { | |
| 3898 return NULL; // Don't permit consecutive slashes | |
| 3899 } | |
| 3900 last_is_slash = true; | |
| 3901 continue; | |
| 3902 } | |
| 3903 } else { | |
| 3904 jint unicode_ch; | |
| 3905 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 3906 p = tmp_p; | |
| 3907 last_is_slash = false; | |
| 3908 // Check if ch is Java identifier start or is Java identifier part | |
| 3909 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 3910 EXCEPTION_MARK; | |
| 3911 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
| 3912 | |
| 3913 // return value | |
| 3914 JavaValue result(T_BOOLEAN); | |
| 3915 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 3916 JavaCallArguments args; | |
| 3917 args.push_int(unicode_ch); | |
| 3918 | |
| 3919 // public static boolean isJavaIdentifierStart(char ch); | |
| 3920 JavaCalls::call_static(&result, | |
| 3921 klass, | |
| 3922 vmSymbolHandles::isJavaIdentifierStart_name(), | |
| 3923 vmSymbolHandles::int_bool_signature(), | |
| 3924 &args, | |
| 3925 THREAD); | |
| 3926 | |
| 3927 if (HAS_PENDING_EXCEPTION) { | |
| 3928 CLEAR_PENDING_EXCEPTION; | |
| 3929 return 0; | |
| 3930 } | |
| 3931 if (result.get_jboolean()) { | |
| 3932 continue; | |
| 3933 } | |
| 3934 | |
| 3935 if (not_first_ch) { | |
| 3936 // public static boolean isJavaIdentifierPart(char ch); | |
| 3937 JavaCalls::call_static(&result, | |
| 3938 klass, | |
| 3939 vmSymbolHandles::isJavaIdentifierPart_name(), | |
| 3940 vmSymbolHandles::int_bool_signature(), | |
| 3941 &args, | |
| 3942 THREAD); | |
| 3943 | |
| 3944 if (HAS_PENDING_EXCEPTION) { | |
| 3945 CLEAR_PENDING_EXCEPTION; | |
| 3946 return 0; | |
| 3947 } | |
| 3948 | |
| 3949 if (result.get_jboolean()) { | |
| 3950 continue; | |
| 3951 } | |
| 3952 } | |
| 3953 } | |
| 3954 return (not_first_ch) ? old_p : NULL; | |
| 3955 } | |
| 3956 return (not_first_ch) ? p : NULL; | |
| 3957 } | |
| 3958 | |
| 3959 | |
| 3960 // Take pointer to a string. Skip over the longest part of the string that could | |
| 3961 // be taken as a field signature. Allow "void" if void_ok. | |
| 3962 // Return a pointer to just past the signature. | |
| 3963 // Return NULL if no legal signature is found. | |
| 3964 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 3965 bool void_ok, | |
| 3966 unsigned int length, | |
| 3967 TRAPS) { | |
| 3968 unsigned int array_dim = 0; | |
| 3969 while (length > 0) { | |
| 3970 switch (signature[0]) { | |
| 3971 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 3972 case JVM_SIGNATURE_BOOLEAN: | |
| 3973 case JVM_SIGNATURE_BYTE: | |
| 3974 case JVM_SIGNATURE_CHAR: | |
| 3975 case JVM_SIGNATURE_SHORT: | |
| 3976 case JVM_SIGNATURE_INT: | |
| 3977 case JVM_SIGNATURE_FLOAT: | |
| 3978 case JVM_SIGNATURE_LONG: | |
| 3979 case JVM_SIGNATURE_DOUBLE: | |
| 3980 return signature + 1; | |
| 3981 case JVM_SIGNATURE_CLASS: { | |
| 3982 if (_major_version < JAVA_1_5_VERSION) { | |
| 3983 // Skip over the class name if one is there | |
| 3984 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 3985 | |
| 3986 // The next character better be a semicolon | |
| 3987 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 3988 return p + 1; | |
| 3989 } | |
| 3990 } else { | |
| 3991 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 3992 length--; | |
| 3993 signature++; | |
| 3994 while (length > 0 && signature[0] != ';') { | |
| 3995 if (signature[0] == '.') { | |
| 3996 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 3997 } | |
| 3998 length--; | |
| 3999 signature++; | |
| 4000 } | |
| 4001 if (signature[0] == ';') { return signature + 1; } | |
| 4002 } | |
| 4003 | |
| 4004 return NULL; | |
| 4005 } | |
| 4006 case JVM_SIGNATURE_ARRAY: | |
| 4007 array_dim++; | |
| 4008 if (array_dim > 255) { | |
| 4009 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4010 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4011 } | |
| 4012 // The rest of what's there better be a legal signature | |
| 4013 signature++; | |
| 4014 length--; | |
| 4015 void_ok = false; | |
| 4016 break; | |
| 4017 | |
| 4018 default: | |
| 4019 return NULL; | |
| 4020 } | |
| 4021 } | |
| 4022 return NULL; | |
| 4023 } |