Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 176:6b648fefb395
6705523: Fix for 6695506 will violate spec when used in JDK6
Summary: Make max classfile version number dependent on JDK version
Reviewed-by: acorn, never
| author | kamg |
|---|---|
| date | Thu, 22 May 2008 13:03:52 -0400 |
| parents | 7f3a69574470 |
| children | 1f809e010142 |
| 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 | |
|
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37 #define JAVA_MAX_SUPPORTED_VERSION 51 |
| 0 | 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
| 39 | |
| 40 // Used for two backward compatibility reasons: | |
| 41 // - to check for new additions to the class file format in JDK1.5 | |
| 42 // - to check for bug fixes in the format checker in JDK1.5 | |
| 43 #define JAVA_1_5_VERSION 49 | |
| 44 | |
| 45 // Used for backward compatibility reasons: | |
| 46 // - to check for javac bug fixes that happened after 1.5 | |
|
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6705523: Fix for 6695506 will violate spec when used in JDK6
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|
47 // - also used as the max version when running in jdk6 |
| 0 | 48 #define JAVA_6_VERSION 50 |
| 49 | |
| 50 | |
| 51 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 52 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 53 // this function (_current can be allocated in a register, with scalar | |
| 54 // replacement of aggregates). The _current pointer is copied back to | |
| 55 // stream() when this function returns. DON'T call another method within | |
| 56 // this method that uses stream(). | |
| 57 ClassFileStream* cfs0 = stream(); | |
| 58 ClassFileStream cfs1 = *cfs0; | |
| 59 ClassFileStream* cfs = &cfs1; | |
| 60 #ifdef ASSERT | |
| 61 u1* old_current = cfs0->current(); | |
| 62 #endif | |
| 63 | |
| 64 // Used for batching symbol allocations. | |
| 65 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 66 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 67 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 68 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 69 int names_count = 0; | |
| 70 | |
| 71 // parsing Index 0 is unused | |
| 72 for (int index = 1; index < length; index++) { | |
| 73 // Each of the following case guarantees one more byte in the stream | |
| 74 // for the following tag or the access_flags following constant pool, | |
| 75 // so we don't need bounds-check for reading tag. | |
| 76 u1 tag = cfs->get_u1_fast(); | |
| 77 switch (tag) { | |
| 78 case JVM_CONSTANT_Class : | |
| 79 { | |
| 80 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 81 u2 name_index = cfs->get_u2_fast(); | |
| 82 cp->klass_index_at_put(index, name_index); | |
| 83 } | |
| 84 break; | |
| 85 case JVM_CONSTANT_Fieldref : | |
| 86 { | |
| 87 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 88 u2 class_index = cfs->get_u2_fast(); | |
| 89 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 90 cp->field_at_put(index, class_index, name_and_type_index); | |
| 91 } | |
| 92 break; | |
| 93 case JVM_CONSTANT_Methodref : | |
| 94 { | |
| 95 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 96 u2 class_index = cfs->get_u2_fast(); | |
| 97 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 98 cp->method_at_put(index, class_index, name_and_type_index); | |
| 99 } | |
| 100 break; | |
| 101 case JVM_CONSTANT_InterfaceMethodref : | |
| 102 { | |
| 103 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 104 u2 class_index = cfs->get_u2_fast(); | |
| 105 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 106 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 107 } | |
| 108 break; | |
| 109 case JVM_CONSTANT_String : | |
| 110 { | |
| 111 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 112 u2 string_index = cfs->get_u2_fast(); | |
| 113 cp->string_index_at_put(index, string_index); | |
| 114 } | |
| 115 break; | |
| 116 case JVM_CONSTANT_Integer : | |
| 117 { | |
| 118 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 119 u4 bytes = cfs->get_u4_fast(); | |
| 120 cp->int_at_put(index, (jint) bytes); | |
| 121 } | |
| 122 break; | |
| 123 case JVM_CONSTANT_Float : | |
| 124 { | |
| 125 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 126 u4 bytes = cfs->get_u4_fast(); | |
| 127 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 128 } | |
| 129 break; | |
| 130 case JVM_CONSTANT_Long : | |
| 131 // A mangled type might cause you to overrun allocated memory | |
| 132 guarantee_property(index+1 < length, | |
| 133 "Invalid constant pool entry %u in class file %s", | |
| 134 index, CHECK); | |
| 135 { | |
| 136 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 137 u8 bytes = cfs->get_u8_fast(); | |
| 138 cp->long_at_put(index, bytes); | |
| 139 } | |
| 140 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 141 break; | |
| 142 case JVM_CONSTANT_Double : | |
| 143 // A mangled type might cause you to overrun allocated memory | |
| 144 guarantee_property(index+1 < length, | |
| 145 "Invalid constant pool entry %u in class file %s", | |
| 146 index, CHECK); | |
| 147 { | |
| 148 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 149 u8 bytes = cfs->get_u8_fast(); | |
| 150 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 151 } | |
| 152 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 153 break; | |
| 154 case JVM_CONSTANT_NameAndType : | |
| 155 { | |
| 156 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 157 u2 name_index = cfs->get_u2_fast(); | |
| 158 u2 signature_index = cfs->get_u2_fast(); | |
| 159 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 160 } | |
| 161 break; | |
| 162 case JVM_CONSTANT_Utf8 : | |
| 163 { | |
| 164 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 165 u2 utf8_length = cfs->get_u2_fast(); | |
| 166 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 167 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 168 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 169 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 170 cfs->skip_u1_fast(utf8_length); | |
| 171 // Before storing the symbol, make sure it's legal | |
| 172 if (_need_verify) { | |
| 173 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 174 } | |
| 175 | |
| 176 unsigned int hash; | |
| 177 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
| 178 if (result == NULL) { | |
| 179 names[names_count] = (char*)utf8_buffer; | |
| 180 lengths[names_count] = utf8_length; | |
| 181 indices[names_count] = index; | |
| 182 hashValues[names_count++] = hash; | |
| 183 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
| 184 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 185 names_count = 0; | |
| 186 } | |
| 187 } else { | |
| 188 cp->symbol_at_put(index, result); | |
| 189 } | |
| 190 } | |
| 191 break; | |
| 192 default: | |
| 193 classfile_parse_error( | |
| 194 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 195 break; | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 // Allocate the remaining symbols | |
| 200 if (names_count > 0) { | |
| 201 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
| 202 } | |
| 203 | |
| 204 // Copy _current pointer of local copy back to stream(). | |
| 205 #ifdef ASSERT | |
| 206 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 207 #endif | |
| 208 cfs0->set_current(cfs1.current()); | |
| 209 } | |
| 210 | |
| 211 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
| 212 | |
| 213 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 214 ClassFileStream* cfs = stream(); | |
| 215 constantPoolHandle nullHandle; | |
| 216 | |
| 217 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 218 u2 length = cfs->get_u2_fast(); | |
| 219 guarantee_property( | |
| 220 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 221 length, CHECK_(nullHandle)); | |
| 222 constantPoolOop constant_pool = | |
| 223 oopFactory::new_constantPool(length, CHECK_(nullHandle)); | |
| 224 constantPoolHandle cp (THREAD, constant_pool); | |
| 225 | |
| 226 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
| 227 | |
| 228 // parsing constant pool entries | |
| 229 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 230 | |
| 231 int index = 1; // declared outside of loops for portability | |
| 232 | |
| 233 // first verification pass - validate cross references and fixup class and string constants | |
| 234 for (index = 1; index < length; index++) { // Index 0 is unused | |
| 235 switch (cp->tag_at(index).value()) { | |
| 236 case JVM_CONSTANT_Class : | |
| 237 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 238 break; | |
| 239 case JVM_CONSTANT_Fieldref : | |
| 240 // fall through | |
| 241 case JVM_CONSTANT_Methodref : | |
| 242 // fall through | |
| 243 case JVM_CONSTANT_InterfaceMethodref : { | |
| 244 if (!_need_verify) break; | |
| 245 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 246 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 247 check_property(valid_cp_range(klass_ref_index, length) && | |
| 248 cp->tag_at(klass_ref_index).is_klass_reference(), | |
| 249 "Invalid constant pool index %u in class file %s", | |
| 250 klass_ref_index, | |
| 251 CHECK_(nullHandle)); | |
| 252 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 253 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 254 "Invalid constant pool index %u in class file %s", | |
| 255 name_and_type_ref_index, | |
| 256 CHECK_(nullHandle)); | |
| 257 break; | |
| 258 } | |
| 259 case JVM_CONSTANT_String : | |
| 260 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 261 break; | |
| 262 case JVM_CONSTANT_Integer : | |
| 263 break; | |
| 264 case JVM_CONSTANT_Float : | |
| 265 break; | |
| 266 case JVM_CONSTANT_Long : | |
| 267 case JVM_CONSTANT_Double : | |
| 268 index++; | |
| 269 check_property( | |
| 270 (index < length && cp->tag_at(index).is_invalid()), | |
| 271 "Improper constant pool long/double index %u in class file %s", | |
| 272 index, CHECK_(nullHandle)); | |
| 273 break; | |
| 274 case JVM_CONSTANT_NameAndType : { | |
| 275 if (!_need_verify) break; | |
| 276 int name_ref_index = cp->name_ref_index_at(index); | |
| 277 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 278 check_property( | |
| 279 valid_cp_range(name_ref_index, length) && | |
| 280 cp->tag_at(name_ref_index).is_utf8(), | |
| 281 "Invalid constant pool index %u in class file %s", | |
| 282 name_ref_index, CHECK_(nullHandle)); | |
| 283 check_property( | |
| 284 valid_cp_range(signature_ref_index, length) && | |
| 285 cp->tag_at(signature_ref_index).is_utf8(), | |
| 286 "Invalid constant pool index %u in class file %s", | |
| 287 signature_ref_index, CHECK_(nullHandle)); | |
| 288 break; | |
| 289 } | |
| 290 case JVM_CONSTANT_Utf8 : | |
| 291 break; | |
| 292 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 293 case JVM_CONSTANT_UnresolvedClassInError: | |
| 294 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 295 break; | |
| 296 case JVM_CONSTANT_ClassIndex : | |
| 297 { | |
| 298 int class_index = cp->klass_index_at(index); | |
| 299 check_property( | |
| 300 valid_cp_range(class_index, length) && | |
| 301 cp->tag_at(class_index).is_utf8(), | |
| 302 "Invalid constant pool index %u in class file %s", | |
| 303 class_index, CHECK_(nullHandle)); | |
| 304 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 305 } | |
| 306 break; | |
| 307 case JVM_CONSTANT_UnresolvedString : | |
| 308 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 309 break; | |
| 310 case JVM_CONSTANT_StringIndex : | |
| 311 { | |
| 312 int string_index = cp->string_index_at(index); | |
| 313 check_property( | |
| 314 valid_cp_range(string_index, length) && | |
| 315 cp->tag_at(string_index).is_utf8(), | |
| 316 "Invalid constant pool index %u in class file %s", | |
| 317 string_index, CHECK_(nullHandle)); | |
| 318 symbolOop sym = cp->symbol_at(string_index); | |
| 319 cp->unresolved_string_at_put(index, sym); | |
| 320 } | |
| 321 break; | |
| 322 default: | |
| 323 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
| 324 ShouldNotReachHere(); | |
| 325 break; | |
| 326 } // end of switch | |
| 327 } // end of for | |
| 328 | |
| 329 if (!_need_verify) { | |
| 330 return cp; | |
| 331 } | |
| 332 | |
| 333 // second verification pass - checks the strings are of the right format. | |
| 334 for (index = 1; index < length; index++) { | |
| 335 jbyte tag = cp->tag_at(index).value(); | |
| 336 switch (tag) { | |
| 337 case JVM_CONSTANT_UnresolvedClass: { | |
| 338 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
| 339 verify_legal_class_name(class_name, CHECK_(nullHandle)); | |
| 340 break; | |
| 341 } | |
| 342 case JVM_CONSTANT_Fieldref: | |
| 343 case JVM_CONSTANT_Methodref: | |
| 344 case JVM_CONSTANT_InterfaceMethodref: { | |
| 345 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 346 // already verified to be utf8 | |
| 347 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 348 // already verified to be utf8 | |
| 349 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
| 350 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
| 351 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
| 352 if (tag == JVM_CONSTANT_Fieldref) { | |
| 353 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 354 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
| 355 } else { | |
| 356 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 357 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 358 if (tag == JVM_CONSTANT_Methodref) { | |
| 359 // 4509014: If a class method name begins with '<', it must be "<init>". | |
| 360 assert(!name.is_null(), "method name in constant pool is null"); | |
| 361 unsigned int name_len = name->utf8_length(); | |
| 362 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 363 if (name->byte_at(0) == '<') { | |
| 364 if (name() != vmSymbols::object_initializer_name()) { | |
| 365 classfile_parse_error( | |
| 366 "Bad method name at constant pool index %u in class file %s", | |
| 367 name_ref_index, CHECK_(nullHandle)); | |
| 368 } | |
| 369 } | |
| 370 } | |
| 371 } | |
| 372 break; | |
| 373 } | |
| 374 } // end of switch | |
| 375 } // end of for | |
| 376 | |
| 377 return cp; | |
| 378 } | |
| 379 | |
| 380 | |
| 381 class NameSigHash: public ResourceObj { | |
| 382 public: | |
| 383 symbolOop _name; // name | |
| 384 symbolOop _sig; // signature | |
| 385 NameSigHash* _next; // Next entry in hash table | |
| 386 }; | |
| 387 | |
| 388 | |
| 389 #define HASH_ROW_SIZE 256 | |
| 390 | |
| 391 unsigned int hash(symbolOop name, symbolOop sig) { | |
| 392 unsigned int raw_hash = 0; | |
| 393 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 394 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 395 | |
| 396 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 397 } | |
| 398 | |
| 399 | |
| 400 void initialize_hashtable(NameSigHash** table) { | |
| 401 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 402 } | |
| 403 | |
| 404 // Return false if the name/sig combination is found in table. | |
| 405 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 406 // The old format checker uses heap sort to find duplicates. | |
| 407 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
| 408 // of table since we don't expect symbolOop's to move. | |
| 409 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
| 410 assert(name != NULL, "name in constant pool is NULL"); | |
| 411 | |
| 412 // First lookup for duplicates | |
| 413 int index = hash(name, sig); | |
| 414 NameSigHash* entry = table[index]; | |
| 415 while (entry != NULL) { | |
| 416 if (entry->_name == name && entry->_sig == sig) { | |
| 417 return false; | |
| 418 } | |
| 419 entry = entry->_next; | |
| 420 } | |
| 421 | |
| 422 // No duplicate is found, allocate a new entry and fill it. | |
| 423 entry = new NameSigHash(); | |
| 424 entry->_name = name; | |
| 425 entry->_sig = sig; | |
| 426 | |
| 427 // Insert into hash table | |
| 428 entry->_next = table[index]; | |
| 429 table[index] = entry; | |
| 430 | |
| 431 return true; | |
| 432 } | |
| 433 | |
| 434 | |
| 435 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 436 int length, | |
| 437 Handle class_loader, | |
| 438 Handle protection_domain, | |
| 439 PerfTraceTime* vmtimer, | |
| 440 symbolHandle class_name, | |
| 441 TRAPS) { | |
| 442 ClassFileStream* cfs = stream(); | |
| 443 assert(length > 0, "only called for length>0"); | |
| 444 objArrayHandle nullHandle; | |
| 445 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 446 objArrayHandle interfaces (THREAD, interface_oop); | |
| 447 | |
| 448 int index; | |
| 449 for (index = 0; index < length; index++) { | |
| 450 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
| 451 check_property( | |
| 452 valid_cp_range(interface_index, cp->length()) && | |
| 453 cp->tag_at(interface_index).is_unresolved_klass(), | |
| 454 "Interface name has bad constant pool index %u in class file %s", | |
| 455 interface_index, CHECK_(nullHandle)); | |
| 456 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); | |
| 457 | |
| 458 // Don't need to check legal name because it's checked when parsing constant pool. | |
| 459 // But need to make sure it's not an array type. | |
| 460 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 461 "Bad interface name in class file %s", CHECK_(nullHandle)); | |
| 462 | |
| 463 vmtimer->suspend(); // do not count recursive loading twice | |
| 464 // Call resolve_super so classcircularity is checked | |
| 465 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 466 unresolved_klass, class_loader, protection_domain, | |
| 467 false, CHECK_(nullHandle)); | |
| 468 KlassHandle interf (THREAD, k); | |
| 469 vmtimer->resume(); | |
| 470 | |
| 471 if (!Klass::cast(interf())->is_interface()) { | |
| 472 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 473 } | |
| 474 interfaces->obj_at_put(index, interf()); | |
| 475 } | |
| 476 | |
| 477 if (!_need_verify || length <= 1) { | |
| 478 return interfaces; | |
| 479 } | |
| 480 | |
| 481 // Check if there's any duplicates in interfaces | |
| 482 ResourceMark rm(THREAD); | |
| 483 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 484 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 485 initialize_hashtable(interface_names); | |
| 486 bool dup = false; | |
| 487 { | |
| 488 debug_only(No_Safepoint_Verifier nsv;) | |
| 489 for (index = 0; index < length; index++) { | |
| 490 klassOop k = (klassOop)interfaces->obj_at(index); | |
| 491 symbolOop name = instanceKlass::cast(k)->name(); | |
| 492 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
| 493 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 494 dup = true; | |
| 495 break; | |
| 496 } | |
| 497 } | |
| 498 } | |
| 499 if (dup) { | |
| 500 classfile_parse_error("Duplicate interface name in class file %s", | |
| 501 CHECK_(nullHandle)); | |
| 502 } | |
| 503 | |
| 504 return interfaces; | |
| 505 } | |
| 506 | |
| 507 | |
| 508 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 509 // Make sure the constant pool entry is of a type appropriate to this field | |
| 510 guarantee_property( | |
| 511 (constantvalue_index > 0 && | |
| 512 constantvalue_index < cp->length()), | |
| 513 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 514 constantvalue_index, CHECK); | |
| 515 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 516 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 517 case T_LONG: | |
| 518 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 519 break; | |
| 520 case T_FLOAT: | |
| 521 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 522 break; | |
| 523 case T_DOUBLE: | |
| 524 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 525 break; | |
| 526 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 527 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 528 break; | |
| 529 case T_OBJECT: | |
| 530 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
| 531 && (value_type.is_string() || value_type.is_unresolved_string())), | |
| 532 "Bad string initial value in class file %s", CHECK); | |
| 533 break; | |
| 534 default: | |
| 535 classfile_parse_error( | |
| 536 "Unable to set initial value %u in class file %s", | |
| 537 constantvalue_index, CHECK); | |
| 538 } | |
| 539 } | |
| 540 | |
| 541 | |
| 542 // Parse attributes for a field. | |
| 543 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 544 u2 attributes_count, | |
| 545 bool is_static, u2 signature_index, | |
| 546 u2* constantvalue_index_addr, | |
| 547 bool* is_synthetic_addr, | |
| 548 u2* generic_signature_index_addr, | |
| 549 typeArrayHandle* field_annotations, | |
| 550 TRAPS) { | |
| 551 ClassFileStream* cfs = stream(); | |
| 552 assert(attributes_count > 0, "length should be greater than 0"); | |
| 553 u2 constantvalue_index = 0; | |
| 554 u2 generic_signature_index = 0; | |
| 555 bool is_synthetic = false; | |
| 556 u1* runtime_visible_annotations = NULL; | |
| 557 int runtime_visible_annotations_length = 0; | |
| 558 u1* runtime_invisible_annotations = NULL; | |
| 559 int runtime_invisible_annotations_length = 0; | |
| 560 while (attributes_count--) { | |
| 561 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 562 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 563 u4 attribute_length = cfs->get_u4_fast(); | |
| 564 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 565 cp->tag_at(attribute_name_index).is_utf8(), | |
| 566 "Invalid field attribute index %u in class file %s", | |
| 567 attribute_name_index, | |
| 568 CHECK); | |
| 569 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
| 570 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
| 571 // ignore if non-static | |
| 572 if (constantvalue_index != 0) { | |
| 573 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 574 } | |
| 575 check_property( | |
| 576 attribute_length == 2, | |
| 577 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 578 attribute_length, CHECK); | |
| 579 constantvalue_index = cfs->get_u2(CHECK); | |
| 580 if (_need_verify) { | |
| 581 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 582 } | |
| 583 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 584 if (attribute_length != 0) { | |
| 585 classfile_parse_error( | |
| 586 "Invalid Synthetic field attribute length %u in class file %s", | |
| 587 attribute_length, CHECK); | |
| 588 } | |
| 589 is_synthetic = true; | |
| 590 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 591 if (attribute_length != 0) { | |
| 592 classfile_parse_error( | |
| 593 "Invalid Deprecated field attribute length %u in class file %s", | |
| 594 attribute_length, CHECK); | |
| 595 } | |
| 596 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 597 if (attribute_name == vmSymbols::tag_signature()) { | |
| 598 if (attribute_length != 2) { | |
| 599 classfile_parse_error( | |
| 600 "Wrong size %u for field's Signature attribute in class file %s", | |
| 601 attribute_length, CHECK); | |
| 602 } | |
| 603 generic_signature_index = cfs->get_u2(CHECK); | |
| 604 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 605 runtime_visible_annotations_length = attribute_length; | |
| 606 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 607 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 608 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 609 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 610 runtime_invisible_annotations_length = attribute_length; | |
| 611 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 612 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 613 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 614 } else { | |
| 615 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 616 } | |
| 617 } else { | |
| 618 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 619 } | |
| 620 } | |
| 621 | |
| 622 *constantvalue_index_addr = constantvalue_index; | |
| 623 *is_synthetic_addr = is_synthetic; | |
| 624 *generic_signature_index_addr = generic_signature_index; | |
| 625 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 626 runtime_visible_annotations_length, | |
| 627 runtime_invisible_annotations, | |
| 628 runtime_invisible_annotations_length, | |
| 629 CHECK); | |
| 630 return; | |
| 631 } | |
| 632 | |
| 633 | |
| 634 // Field allocation types. Used for computing field offsets. | |
| 635 | |
| 636 enum FieldAllocationType { | |
| 637 STATIC_OOP, // Oops | |
| 638 STATIC_BYTE, // Boolean, Byte, char | |
| 639 STATIC_SHORT, // shorts | |
| 640 STATIC_WORD, // ints | |
| 641 STATIC_DOUBLE, // long or double | |
| 642 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 643 NONSTATIC_OOP, | |
| 644 NONSTATIC_BYTE, | |
| 645 NONSTATIC_SHORT, | |
| 646 NONSTATIC_WORD, | |
| 647 NONSTATIC_DOUBLE, | |
| 648 NONSTATIC_ALIGNED_DOUBLE | |
| 649 }; | |
| 650 | |
| 651 | |
| 652 struct FieldAllocationCount { | |
| 653 int static_oop_count; | |
| 654 int static_byte_count; | |
| 655 int static_short_count; | |
| 656 int static_word_count; | |
| 657 int static_double_count; | |
| 658 int nonstatic_oop_count; | |
| 659 int nonstatic_byte_count; | |
| 660 int nonstatic_short_count; | |
| 661 int nonstatic_word_count; | |
| 662 int nonstatic_double_count; | |
| 663 }; | |
| 664 | |
| 665 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 666 struct FieldAllocationCount *fac, | |
| 667 objArrayHandle* fields_annotations, TRAPS) { | |
| 668 ClassFileStream* cfs = stream(); | |
| 669 typeArrayHandle nullHandle; | |
| 670 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 671 u2 length = cfs->get_u2_fast(); | |
| 672 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 673 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 674 typeArrayHandle fields(THREAD, new_fields); | |
| 675 | |
| 676 int index = 0; | |
| 677 typeArrayHandle field_annotations; | |
| 678 for (int n = 0; n < length; n++) { | |
| 679 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 680 | |
| 681 AccessFlags access_flags; | |
| 682 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 683 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 684 access_flags.set_flags(flags); | |
| 685 | |
| 686 u2 name_index = cfs->get_u2_fast(); | |
| 687 int cp_size = cp->length(); | |
| 688 check_property( | |
| 689 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 690 "Invalid constant pool index %u for field name in class file %s", | |
| 691 name_index, CHECK_(nullHandle)); | |
| 692 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 693 verify_legal_field_name(name, CHECK_(nullHandle)); | |
| 694 | |
| 695 u2 signature_index = cfs->get_u2_fast(); | |
| 696 check_property( | |
| 697 valid_cp_range(signature_index, cp_size) && | |
| 698 cp->tag_at(signature_index).is_utf8(), | |
| 699 "Invalid constant pool index %u for field signature in class file %s", | |
| 700 signature_index, CHECK_(nullHandle)); | |
| 701 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
| 702 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
| 703 | |
| 704 u2 constantvalue_index = 0; | |
| 705 bool is_synthetic = false; | |
| 706 u2 generic_signature_index = 0; | |
| 707 bool is_static = access_flags.is_static(); | |
| 708 | |
| 709 u2 attributes_count = cfs->get_u2_fast(); | |
| 710 if (attributes_count > 0) { | |
| 711 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 712 &constantvalue_index, &is_synthetic, | |
| 713 &generic_signature_index, &field_annotations, | |
| 714 CHECK_(nullHandle)); | |
| 715 if (field_annotations.not_null()) { | |
| 716 if (fields_annotations->is_null()) { | |
| 717 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 718 *fields_annotations = objArrayHandle(THREAD, md); | |
| 719 } | |
| 720 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 721 } | |
| 722 if (is_synthetic) { | |
| 723 access_flags.set_is_synthetic(); | |
| 724 } | |
| 725 } | |
| 726 | |
| 727 fields->short_at_put(index++, access_flags.as_short()); | |
| 728 fields->short_at_put(index++, name_index); | |
| 729 fields->short_at_put(index++, signature_index); | |
| 730 fields->short_at_put(index++, constantvalue_index); | |
| 731 | |
| 732 // Remember how many oops we encountered and compute allocation type | |
| 733 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 734 FieldAllocationType atype; | |
| 735 if ( is_static ) { | |
| 736 switch ( type ) { | |
| 737 case T_BOOLEAN: | |
| 738 case T_BYTE: | |
| 739 fac->static_byte_count++; | |
| 740 atype = STATIC_BYTE; | |
| 741 break; | |
| 742 case T_LONG: | |
| 743 case T_DOUBLE: | |
| 744 if (Universe::field_type_should_be_aligned(type)) { | |
| 745 atype = STATIC_ALIGNED_DOUBLE; | |
| 746 } else { | |
| 747 atype = STATIC_DOUBLE; | |
| 748 } | |
| 749 fac->static_double_count++; | |
| 750 break; | |
| 751 case T_CHAR: | |
| 752 case T_SHORT: | |
| 753 fac->static_short_count++; | |
| 754 atype = STATIC_SHORT; | |
| 755 break; | |
| 756 case T_FLOAT: | |
| 757 case T_INT: | |
| 758 fac->static_word_count++; | |
| 759 atype = STATIC_WORD; | |
| 760 break; | |
| 761 case T_ARRAY: | |
| 762 case T_OBJECT: | |
| 763 fac->static_oop_count++; | |
| 764 atype = STATIC_OOP; | |
| 765 break; | |
| 766 case T_ADDRESS: | |
| 767 case T_VOID: | |
| 768 default: | |
| 769 assert(0, "bad field type"); | |
| 770 } | |
| 771 } else { | |
| 772 switch ( type ) { | |
| 773 case T_BOOLEAN: | |
| 774 case T_BYTE: | |
| 775 fac->nonstatic_byte_count++; | |
| 776 atype = NONSTATIC_BYTE; | |
| 777 break; | |
| 778 case T_LONG: | |
| 779 case T_DOUBLE: | |
| 780 if (Universe::field_type_should_be_aligned(type)) { | |
| 781 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 782 } else { | |
| 783 atype = NONSTATIC_DOUBLE; | |
| 784 } | |
| 785 fac->nonstatic_double_count++; | |
| 786 break; | |
| 787 case T_CHAR: | |
| 788 case T_SHORT: | |
| 789 fac->nonstatic_short_count++; | |
| 790 atype = NONSTATIC_SHORT; | |
| 791 break; | |
| 792 case T_FLOAT: | |
| 793 case T_INT: | |
| 794 fac->nonstatic_word_count++; | |
| 795 atype = NONSTATIC_WORD; | |
| 796 break; | |
| 797 case T_ARRAY: | |
| 798 case T_OBJECT: | |
| 799 fac->nonstatic_oop_count++; | |
| 800 atype = NONSTATIC_OOP; | |
| 801 break; | |
| 802 case T_ADDRESS: | |
| 803 case T_VOID: | |
| 804 default: | |
| 805 assert(0, "bad field type"); | |
| 806 } | |
| 807 } | |
| 808 | |
| 809 // The correct offset is computed later (all oop fields will be located together) | |
| 810 // We temporarily store the allocation type in the offset field | |
| 811 fields->short_at_put(index++, atype); | |
| 812 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 813 fields->short_at_put(index++, generic_signature_index); | |
| 814 } | |
| 815 | |
| 816 if (_need_verify && length > 1) { | |
| 817 // Check duplicated fields | |
| 818 ResourceMark rm(THREAD); | |
| 819 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 820 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 821 initialize_hashtable(names_and_sigs); | |
| 822 bool dup = false; | |
| 823 { | |
| 824 debug_only(No_Safepoint_Verifier nsv;) | |
| 825 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 826 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
| 827 symbolOop name = cp->symbol_at(name_index); | |
| 828 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
| 829 symbolOop sig = cp->symbol_at(sig_index); | |
| 830 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 831 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 832 dup = true; | |
| 833 break; | |
| 834 } | |
| 835 } | |
| 836 } | |
| 837 if (dup) { | |
| 838 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 839 CHECK_(nullHandle)); | |
| 840 } | |
| 841 } | |
| 842 | |
| 843 return fields; | |
| 844 } | |
| 845 | |
| 846 | |
| 847 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 848 while (length-- > 0) { | |
| 849 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 850 } | |
| 851 } | |
| 852 | |
| 853 | |
| 854 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 855 u4 exception_table_length, | |
| 856 constantPoolHandle cp, | |
| 857 TRAPS) { | |
| 858 ClassFileStream* cfs = stream(); | |
| 859 typeArrayHandle nullHandle; | |
| 860 | |
| 861 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 862 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 863 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 864 | |
| 865 int index = 0; | |
| 866 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 867 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 868 u2 start_pc = cfs->get_u2_fast(); | |
| 869 u2 end_pc = cfs->get_u2_fast(); | |
| 870 u2 handler_pc = cfs->get_u2_fast(); | |
| 871 u2 catch_type_index = cfs->get_u2_fast(); | |
| 872 // Will check legal target after parsing code array in verifier. | |
| 873 if (_need_verify) { | |
| 874 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 875 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 876 guarantee_property(handler_pc < code_length, | |
| 877 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 878 if (catch_type_index != 0) { | |
| 879 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
| 880 (cp->tag_at(catch_type_index).is_klass() || | |
| 881 cp->tag_at(catch_type_index).is_unresolved_klass()), | |
| 882 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); | |
| 883 } | |
| 884 } | |
| 885 exception_handlers->int_at_put(index++, start_pc); | |
| 886 exception_handlers->int_at_put(index++, end_pc); | |
| 887 exception_handlers->int_at_put(index++, handler_pc); | |
| 888 exception_handlers->int_at_put(index++, catch_type_index); | |
| 889 } | |
| 890 return exception_handlers; | |
| 891 } | |
| 892 | |
| 893 void ClassFileParser::parse_linenumber_table( | |
| 894 u4 code_attribute_length, u4 code_length, | |
| 895 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 896 ClassFileStream* cfs = stream(); | |
| 897 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 898 | |
| 899 // Each entry is a u2 start_pc, and a u2 line_number | |
| 900 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 901 | |
| 902 // Verify line number attribute and table length | |
| 903 check_property( | |
| 904 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 905 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 906 | |
| 907 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 908 | |
| 909 if ((*write_stream) == NULL) { | |
| 910 if (length_in_bytes > fixed_buffer_size) { | |
| 911 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 912 } else { | |
| 913 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 914 linenumbertable_buffer, fixed_buffer_size); | |
| 915 } | |
| 916 } | |
| 917 | |
| 918 while (num_entries-- > 0) { | |
| 919 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 920 u2 line = cfs->get_u2_fast(); // line_number | |
| 921 guarantee_property(bci < code_length, | |
| 922 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 923 (*write_stream)->write_pair(bci, line); | |
| 924 } | |
| 925 } | |
| 926 | |
| 927 | |
| 928 // Class file LocalVariableTable elements. | |
| 929 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 930 public: | |
| 931 u2 start_bci; | |
| 932 u2 length; | |
| 933 u2 name_cp_index; | |
| 934 u2 descriptor_cp_index; | |
| 935 u2 slot; | |
| 936 }; | |
| 937 | |
| 938 | |
| 939 class LVT_Hash: public CHeapObj { | |
| 940 public: | |
| 941 LocalVariableTableElement *_elem; // element | |
| 942 LVT_Hash* _next; // Next entry in hash table | |
| 943 }; | |
| 944 | |
| 945 unsigned int hash(LocalVariableTableElement *elem) { | |
| 946 unsigned int raw_hash = elem->start_bci; | |
| 947 | |
| 948 raw_hash = elem->length + raw_hash * 37; | |
| 949 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 950 raw_hash = elem->slot + raw_hash * 37; | |
| 951 | |
| 952 return raw_hash % HASH_ROW_SIZE; | |
| 953 } | |
| 954 | |
| 955 void initialize_hashtable(LVT_Hash** table) { | |
| 956 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 957 table[i] = NULL; | |
| 958 } | |
| 959 } | |
| 960 | |
| 961 void clear_hashtable(LVT_Hash** table) { | |
| 962 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 963 LVT_Hash* current = table[i]; | |
| 964 LVT_Hash* next; | |
| 965 while (current != NULL) { | |
| 966 next = current->_next; | |
| 967 current->_next = NULL; | |
| 968 delete(current); | |
| 969 current = next; | |
| 970 } | |
| 971 table[i] = NULL; | |
| 972 } | |
| 973 } | |
| 974 | |
| 975 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 976 LVT_Hash* entry = table[index]; | |
| 977 | |
| 978 /* | |
| 979 * 3-tuple start_bci/length/slot has to be unique key, | |
| 980 * so the following comparison seems to be redundant: | |
| 981 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 982 */ | |
| 983 while (entry != NULL) { | |
| 984 if (elem->start_bci == entry->_elem->start_bci | |
| 985 && elem->length == entry->_elem->length | |
| 986 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 987 && elem->slot == entry->_elem->slot | |
| 988 ) { | |
| 989 return entry; | |
| 990 } | |
| 991 entry = entry->_next; | |
| 992 } | |
| 993 return NULL; | |
| 994 } | |
| 995 | |
| 996 // Return false if the local variable is found in table. | |
| 997 // Return true if no duplicate is found. | |
| 998 // And local variable is added as a new entry in table. | |
| 999 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1000 // First lookup for duplicates | |
| 1001 int index = hash(elem); | |
| 1002 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1003 | |
| 1004 if (entry != NULL) { | |
| 1005 return false; | |
| 1006 } | |
| 1007 // No duplicate is found, allocate a new entry and fill it. | |
| 1008 if ((entry = new LVT_Hash()) == NULL) { | |
| 1009 return false; | |
| 1010 } | |
| 1011 entry->_elem = elem; | |
| 1012 | |
| 1013 // Insert into hash table | |
| 1014 entry->_next = table[index]; | |
| 1015 table[index] = entry; | |
| 1016 | |
| 1017 return true; | |
| 1018 } | |
| 1019 | |
| 1020 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1021 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1022 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1023 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1024 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1025 lvt->signature_cp_index = 0; | |
| 1026 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1027 } | |
| 1028 | |
| 1029 // Function is used to parse both attributes: | |
| 1030 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1031 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1032 u2 max_locals, | |
| 1033 u4 code_attribute_length, | |
| 1034 constantPoolHandle cp, | |
| 1035 u2* localvariable_table_length, | |
| 1036 bool isLVTT, | |
| 1037 TRAPS) { | |
| 1038 ClassFileStream* cfs = stream(); | |
| 1039 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1040 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1041 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1042 // Verify local variable table attribute has right length | |
| 1043 if (_need_verify) { | |
| 1044 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1045 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1046 } | |
| 1047 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1048 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1049 if (!_need_verify) { | |
| 1050 cfs->skip_u2_fast(size); | |
| 1051 } else { | |
| 1052 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1053 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1054 u2 start_pc = cfs->get_u2_fast(); | |
| 1055 u2 length = cfs->get_u2_fast(); | |
| 1056 u2 name_index = cfs->get_u2_fast(); | |
| 1057 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1058 u2 index = cfs->get_u2_fast(); | |
| 1059 // Assign to a u4 to avoid overflow | |
| 1060 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1061 | |
| 1062 if (start_pc >= code_length) { | |
| 1063 classfile_parse_error( | |
| 1064 "Invalid start_pc %u in %s in class file %s", | |
| 1065 start_pc, tbl_name, CHECK_NULL); | |
| 1066 } | |
| 1067 if (end_pc > code_length) { | |
| 1068 classfile_parse_error( | |
| 1069 "Invalid length %u in %s in class file %s", | |
| 1070 length, tbl_name, CHECK_NULL); | |
| 1071 } | |
| 1072 int cp_size = cp->length(); | |
| 1073 guarantee_property( | |
| 1074 valid_cp_range(name_index, cp_size) && | |
| 1075 cp->tag_at(name_index).is_utf8(), | |
| 1076 "Name index %u in %s has bad constant type in class file %s", | |
| 1077 name_index, tbl_name, CHECK_NULL); | |
| 1078 guarantee_property( | |
| 1079 valid_cp_range(descriptor_index, cp_size) && | |
| 1080 cp->tag_at(descriptor_index).is_utf8(), | |
| 1081 "Signature index %u in %s has bad constant type in class file %s", | |
| 1082 descriptor_index, tbl_name, CHECK_NULL); | |
| 1083 | |
| 1084 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1085 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
| 1086 verify_legal_field_name(name, CHECK_NULL); | |
| 1087 u2 extra_slot = 0; | |
| 1088 if (!isLVTT) { | |
| 1089 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1090 | |
| 1091 // 4894874: check special cases for double and long local variables | |
| 1092 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
| 1093 sig() == vmSymbols::type_signature(T_LONG)) { | |
| 1094 extra_slot = 1; | |
| 1095 } | |
| 1096 } | |
| 1097 guarantee_property((index + extra_slot) < max_locals, | |
| 1098 "Invalid index %u in %s in class file %s", | |
| 1099 index, tbl_name, CHECK_NULL); | |
| 1100 } | |
| 1101 } | |
| 1102 return localvariable_table_start; | |
| 1103 } | |
| 1104 | |
| 1105 | |
| 1106 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1107 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1108 ClassFileStream* cfs = stream(); | |
| 1109 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1110 u4 i1 = *u1_index; | |
| 1111 u4 i2 = *u2_index + 1; | |
| 1112 for(int i = 0; i < array_length; i++) { | |
| 1113 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1114 index++; | |
| 1115 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1116 index++; | |
| 1117 } else if (tag == ITEM_Object) { | |
| 1118 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1119 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
| 1120 cp->tag_at(class_index).is_unresolved_klass(), | |
| 1121 "Bad class index %u in StackMap in class file %s", | |
| 1122 class_index, CHECK); | |
| 1123 } else if (tag == ITEM_Uninitialized) { | |
| 1124 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1125 guarantee_property( | |
| 1126 offset < code_length, | |
| 1127 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1128 offset, CHECK); | |
| 1129 } else { | |
| 1130 guarantee_property( | |
| 1131 tag <= (u1)ITEM_Uninitialized, | |
| 1132 "Unknown variable type %u in StackMap in class file %s", | |
| 1133 tag, CHECK); | |
| 1134 } | |
| 1135 } | |
| 1136 u2_array[*u2_index] = index; | |
| 1137 *u1_index = i1; | |
| 1138 *u2_index = i2; | |
| 1139 } | |
| 1140 | |
| 1141 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1142 u4 code_attribute_length, TRAPS) { | |
| 1143 if (code_attribute_length == 0) | |
| 1144 return NULL; | |
| 1145 | |
| 1146 ClassFileStream* cfs = stream(); | |
| 1147 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1148 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1149 | |
| 1150 // check code_attribute_length first | |
| 1151 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1152 | |
| 1153 if (!_need_verify && !DumpSharedSpaces) { | |
| 1154 return NULL; | |
| 1155 } | |
| 1156 | |
| 1157 typeArrayOop stackmap_data = | |
| 1158 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1159 | |
| 1160 stackmap_data->set_length(code_attribute_length); | |
| 1161 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1162 (void*)stackmap_table_start, code_attribute_length); | |
| 1163 return stackmap_data; | |
| 1164 } | |
| 1165 | |
| 1166 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1167 u4 method_attribute_length, | |
| 1168 constantPoolHandle cp, TRAPS) { | |
| 1169 ClassFileStream* cfs = stream(); | |
| 1170 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1171 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1172 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1173 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1174 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1175 if (!_need_verify) { | |
| 1176 cfs->skip_u2_fast(size); | |
| 1177 } else { | |
| 1178 // Verify each value in the checked exception table | |
| 1179 u2 checked_exception; | |
| 1180 u2 len = *checked_exceptions_length; | |
| 1181 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1182 for (int i = 0; i < len; i++) { | |
| 1183 checked_exception = cfs->get_u2_fast(); | |
| 1184 check_property( | |
| 1185 valid_cp_range(checked_exception, cp->length()) && | |
| 1186 cp->tag_at(checked_exception).is_klass_reference(), | |
| 1187 "Exception name has bad type at constant pool %u in class file %s", | |
| 1188 checked_exception, CHECK_NULL); | |
| 1189 } | |
| 1190 } | |
| 1191 // check exceptions attribute length | |
| 1192 if (_need_verify) { | |
| 1193 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1194 sizeof(u2) * size), | |
| 1195 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1196 } | |
| 1197 return checked_exceptions_start; | |
| 1198 } | |
| 1199 | |
| 1200 | |
| 1201 #define MAX_ARGS_SIZE 255 | |
| 1202 #define MAX_CODE_SIZE 65535 | |
| 1203 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1204 | |
| 1205 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1206 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1207 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1208 // entire method attribute is parsed. | |
| 1209 // | |
| 1210 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1211 // from the method back up to the containing klass. These flag values | |
| 1212 // are added to klass's access_flags. | |
| 1213 | |
| 1214 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1215 AccessFlags *promoted_flags, | |
| 1216 typeArrayHandle* method_annotations, | |
| 1217 typeArrayHandle* method_parameter_annotations, | |
| 1218 typeArrayHandle* method_default_annotations, | |
| 1219 TRAPS) { | |
| 1220 ClassFileStream* cfs = stream(); | |
| 1221 methodHandle nullHandle; | |
| 1222 ResourceMark rm(THREAD); | |
| 1223 // Parse fixed parts | |
| 1224 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1225 | |
| 1226 int flags = cfs->get_u2_fast(); | |
| 1227 u2 name_index = cfs->get_u2_fast(); | |
| 1228 int cp_size = cp->length(); | |
| 1229 check_property( | |
| 1230 valid_cp_range(name_index, cp_size) && | |
| 1231 cp->tag_at(name_index).is_utf8(), | |
| 1232 "Illegal constant pool index %u for method name in class file %s", | |
| 1233 name_index, CHECK_(nullHandle)); | |
| 1234 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
| 1235 verify_legal_method_name(name, CHECK_(nullHandle)); | |
| 1236 | |
| 1237 u2 signature_index = cfs->get_u2_fast(); | |
| 1238 guarantee_property( | |
| 1239 valid_cp_range(signature_index, cp_size) && | |
| 1240 cp->tag_at(signature_index).is_utf8(), | |
| 1241 "Illegal constant pool index %u for method signature in class file %s", | |
| 1242 signature_index, CHECK_(nullHandle)); | |
| 1243 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
| 1244 | |
| 1245 AccessFlags access_flags; | |
| 1246 if (name == vmSymbols::class_initializer_name()) { | |
| 1247 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1248 flags = JVM_ACC_STATIC; | |
| 1249 } else { | |
| 1250 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1251 } | |
| 1252 | |
| 1253 int args_size = -1; // only used when _need_verify is true | |
| 1254 if (_need_verify) { | |
| 1255 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1256 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1257 if (args_size > MAX_ARGS_SIZE) { | |
| 1258 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1259 } | |
| 1260 } | |
| 1261 | |
| 1262 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1263 | |
| 1264 // Default values for code and exceptions attribute elements | |
| 1265 u2 max_stack = 0; | |
| 1266 u2 max_locals = 0; | |
| 1267 u4 code_length = 0; | |
| 1268 u1* code_start = 0; | |
| 1269 u2 exception_table_length = 0; | |
| 1270 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1271 u2 checked_exceptions_length = 0; | |
| 1272 u2* checked_exceptions_start = NULL; | |
| 1273 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1274 int linenumber_table_length = 0; | |
| 1275 int total_lvt_length = 0; | |
| 1276 u2 lvt_cnt = 0; | |
| 1277 u2 lvtt_cnt = 0; | |
| 1278 bool lvt_allocated = false; | |
| 1279 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1280 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1281 u2* localvariable_table_length; | |
| 1282 u2** localvariable_table_start; | |
| 1283 u2* localvariable_type_table_length; | |
| 1284 u2** localvariable_type_table_start; | |
| 1285 bool parsed_code_attribute = false; | |
| 1286 bool parsed_checked_exceptions_attribute = false; | |
| 1287 bool parsed_stackmap_attribute = false; | |
| 1288 // stackmap attribute - JDK1.5 | |
| 1289 typeArrayHandle stackmap_data; | |
| 1290 u2 generic_signature_index = 0; | |
| 1291 u1* runtime_visible_annotations = NULL; | |
| 1292 int runtime_visible_annotations_length = 0; | |
| 1293 u1* runtime_invisible_annotations = NULL; | |
| 1294 int runtime_invisible_annotations_length = 0; | |
| 1295 u1* runtime_visible_parameter_annotations = NULL; | |
| 1296 int runtime_visible_parameter_annotations_length = 0; | |
| 1297 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1298 int runtime_invisible_parameter_annotations_length = 0; | |
| 1299 u1* annotation_default = NULL; | |
| 1300 int annotation_default_length = 0; | |
| 1301 | |
| 1302 // Parse code and exceptions attribute | |
| 1303 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1304 while (method_attributes_count--) { | |
| 1305 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1306 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1307 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1308 check_property( | |
| 1309 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1310 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1311 "Invalid method attribute name index %u in class file %s", | |
| 1312 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1313 | |
| 1314 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
| 1315 if (method_attribute_name == vmSymbols::tag_code()) { | |
| 1316 // Parse Code attribute | |
| 1317 if (_need_verify) { | |
| 1318 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1319 "Code attribute in native or abstract methods in class file %s", | |
| 1320 CHECK_(nullHandle)); | |
| 1321 } | |
| 1322 if (parsed_code_attribute) { | |
| 1323 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1324 } | |
| 1325 parsed_code_attribute = true; | |
| 1326 | |
| 1327 // Stack size, locals size, and code size | |
| 1328 if (_major_version == 45 && _minor_version <= 2) { | |
| 1329 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1330 max_stack = cfs->get_u1_fast(); | |
| 1331 max_locals = cfs->get_u1_fast(); | |
| 1332 code_length = cfs->get_u2_fast(); | |
| 1333 } else { | |
| 1334 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1335 max_stack = cfs->get_u2_fast(); | |
| 1336 max_locals = cfs->get_u2_fast(); | |
| 1337 code_length = cfs->get_u4_fast(); | |
| 1338 } | |
| 1339 if (_need_verify) { | |
| 1340 guarantee_property(args_size <= max_locals, | |
| 1341 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1342 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1343 "Invalid method Code length %u in class file %s", | |
| 1344 code_length, CHECK_(nullHandle)); | |
| 1345 } | |
| 1346 // Code pointer | |
| 1347 code_start = cfs->get_u1_buffer(); | |
| 1348 assert(code_start != NULL, "null code start"); | |
| 1349 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1350 cfs->skip_u1_fast(code_length); | |
| 1351 | |
| 1352 // Exception handler table | |
| 1353 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1354 exception_table_length = cfs->get_u2_fast(); | |
| 1355 if (exception_table_length > 0) { | |
| 1356 exception_handlers = | |
| 1357 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1358 } | |
| 1359 | |
| 1360 // Parse additional attributes in code attribute | |
| 1361 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1362 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1363 |
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1364 unsigned int calculated_attribute_length = 0; |
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1365 |
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1366 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1367 calculated_attribute_length = |
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1368 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1369 } else { |
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1370 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1371 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1372 } |
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1373 calculated_attribute_length += |
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1374 code_length + |
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1375 sizeof(exception_table_length) + |
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1376 sizeof(code_attributes_count) + |
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1377 exception_table_length * |
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1378 ( sizeof(u2) + // start_pc |
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1379 sizeof(u2) + // end_pc |
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1380 sizeof(u2) + // handler_pc |
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1381 sizeof(u2) ); // catch_type_index |
| 0 | 1382 |
| 1383 while (code_attributes_count--) { | |
| 1384 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1385 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1386 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1387 calculated_attribute_length += code_attribute_length + | |
| 1388 sizeof(code_attribute_name_index) + | |
| 1389 sizeof(code_attribute_length); | |
| 1390 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1391 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1392 "Invalid code attribute name index %u in class file %s", | |
| 1393 code_attribute_name_index, | |
| 1394 CHECK_(nullHandle)); | |
| 1395 if (LoadLineNumberTables && | |
| 1396 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1397 // Parse and compress line number table | |
| 1398 parse_linenumber_table(code_attribute_length, code_length, | |
| 1399 &linenumber_table, CHECK_(nullHandle)); | |
| 1400 | |
| 1401 } else if (LoadLocalVariableTables && | |
| 1402 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1403 // Parse local variable table | |
| 1404 if (!lvt_allocated) { | |
| 1405 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1406 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1407 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1408 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1409 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1410 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1411 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1412 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1413 lvt_allocated = true; | |
| 1414 } | |
| 1415 if (lvt_cnt == max_lvt_cnt) { | |
| 1416 max_lvt_cnt <<= 1; | |
| 1417 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1418 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1419 } | |
| 1420 localvariable_table_start[lvt_cnt] = | |
| 1421 parse_localvariable_table(code_length, | |
| 1422 max_locals, | |
| 1423 code_attribute_length, | |
| 1424 cp, | |
| 1425 &localvariable_table_length[lvt_cnt], | |
| 1426 false, // is not LVTT | |
| 1427 CHECK_(nullHandle)); | |
| 1428 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1429 lvt_cnt++; | |
| 1430 } else if (LoadLocalVariableTypeTables && | |
| 1431 _major_version >= JAVA_1_5_VERSION && | |
| 1432 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1433 if (!lvt_allocated) { | |
| 1434 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1435 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1436 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1437 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1438 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1439 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1440 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1441 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1442 lvt_allocated = true; | |
| 1443 } | |
| 1444 // Parse local variable type table | |
| 1445 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1446 max_lvtt_cnt <<= 1; | |
| 1447 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1448 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1449 } | |
| 1450 localvariable_type_table_start[lvtt_cnt] = | |
| 1451 parse_localvariable_table(code_length, | |
| 1452 max_locals, | |
| 1453 code_attribute_length, | |
| 1454 cp, | |
| 1455 &localvariable_type_table_length[lvtt_cnt], | |
| 1456 true, // is LVTT | |
| 1457 CHECK_(nullHandle)); | |
| 1458 lvtt_cnt++; | |
| 1459 } else if (UseSplitVerifier && | |
| 1460 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1461 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1462 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1463 if (parsed_stackmap_attribute) { | |
| 1464 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1465 } | |
| 1466 typeArrayOop sm = | |
| 1467 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1468 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1469 parsed_stackmap_attribute = true; | |
| 1470 } else { | |
| 1471 // Skip unknown attributes | |
| 1472 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1473 } | |
| 1474 } | |
| 1475 // check method attribute length | |
| 1476 if (_need_verify) { | |
| 1477 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1478 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1479 } | |
| 1480 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1481 // Parse Exceptions attribute | |
| 1482 if (parsed_checked_exceptions_attribute) { | |
| 1483 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1484 } | |
| 1485 parsed_checked_exceptions_attribute = true; | |
| 1486 checked_exceptions_start = | |
| 1487 parse_checked_exceptions(&checked_exceptions_length, | |
| 1488 method_attribute_length, | |
| 1489 cp, CHECK_(nullHandle)); | |
| 1490 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1491 if (method_attribute_length != 0) { | |
| 1492 classfile_parse_error( | |
| 1493 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1494 method_attribute_length, CHECK_(nullHandle)); | |
| 1495 } | |
| 1496 // Should we check that there hasn't already been a synthetic attribute? | |
| 1497 access_flags.set_is_synthetic(); | |
| 1498 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1499 if (method_attribute_length != 0) { | |
| 1500 classfile_parse_error( | |
| 1501 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1502 method_attribute_length, CHECK_(nullHandle)); | |
| 1503 } | |
| 1504 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1505 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1506 if (method_attribute_length != 2) { | |
| 1507 classfile_parse_error( | |
| 1508 "Invalid Signature attribute length %u in class file %s", | |
| 1509 method_attribute_length, CHECK_(nullHandle)); | |
| 1510 } | |
| 1511 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1512 generic_signature_index = cfs->get_u2_fast(); | |
| 1513 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1514 runtime_visible_annotations_length = method_attribute_length; | |
| 1515 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1516 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1517 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1518 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1519 runtime_invisible_annotations_length = method_attribute_length; | |
| 1520 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1521 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1522 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1523 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1524 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1525 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1526 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1527 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1528 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1529 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1530 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1531 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1532 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1533 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1534 annotation_default_length = method_attribute_length; | |
| 1535 annotation_default = cfs->get_u1_buffer(); | |
| 1536 assert(annotation_default != NULL, "null annotation default"); | |
| 1537 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1538 } else { | |
| 1539 // Skip unknown attributes | |
| 1540 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1541 } | |
| 1542 } else { | |
| 1543 // Skip unknown attributes | |
| 1544 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1545 } | |
| 1546 } | |
| 1547 | |
| 1548 if (linenumber_table != NULL) { | |
| 1549 linenumber_table->write_terminator(); | |
| 1550 linenumber_table_length = linenumber_table->position(); | |
| 1551 } | |
| 1552 | |
| 1553 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1554 if (_need_verify) { | |
| 1555 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1556 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1557 } | |
| 1558 | |
| 1559 // All sizing information for a methodOop is finally available, now create it | |
| 1560 methodOop m_oop = oopFactory::new_method( | |
| 1561 code_length, access_flags, linenumber_table_length, | |
| 1562 total_lvt_length, checked_exceptions_length, CHECK_(nullHandle)); | |
| 1563 methodHandle m (THREAD, m_oop); | |
| 1564 | |
| 1565 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1566 | |
| 1567 // Fill in information from fixed part (access_flags already set) | |
| 1568 m->set_constants(cp()); | |
| 1569 m->set_name_index(name_index); | |
| 1570 m->set_signature_index(signature_index); | |
| 1571 m->set_generic_signature_index(generic_signature_index); | |
| 1572 #ifdef CC_INTERP | |
| 1573 // hmm is there a gc issue here?? | |
| 1574 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1575 m->set_result_index(rtf.type()); | |
| 1576 #endif | |
| 1577 | |
| 1578 if (args_size >= 0) { | |
| 1579 m->set_size_of_parameters(args_size); | |
| 1580 } else { | |
| 1581 m->compute_size_of_parameters(THREAD); | |
| 1582 } | |
| 1583 #ifdef ASSERT | |
| 1584 if (args_size >= 0) { | |
| 1585 m->compute_size_of_parameters(THREAD); | |
| 1586 assert(args_size == m->size_of_parameters(), ""); | |
| 1587 } | |
| 1588 #endif | |
| 1589 | |
| 1590 // Fill in code attribute information | |
| 1591 m->set_max_stack(max_stack); | |
| 1592 m->set_max_locals(max_locals); | |
| 1593 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1594 | |
| 1595 /** | |
| 1596 * The exception_table field is the flag used to indicate | |
| 1597 * that the methodOop and it's associated constMethodOop are partially | |
| 1598 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1599 * the field is set, the oops are considered fully initialized so make | |
| 1600 * sure that the oops can pass verification when this field is set. | |
| 1601 */ | |
| 1602 m->set_exception_table(exception_handlers()); | |
| 1603 | |
| 1604 // Copy byte codes | |
| 1605 if (code_length > 0) { | |
| 1606 memcpy(m->code_base(), code_start, code_length); | |
| 1607 } | |
| 1608 | |
| 1609 // Copy line number table | |
| 1610 if (linenumber_table != NULL) { | |
| 1611 memcpy(m->compressed_linenumber_table(), | |
| 1612 linenumber_table->buffer(), linenumber_table_length); | |
| 1613 } | |
| 1614 | |
| 1615 // Copy checked exceptions | |
| 1616 if (checked_exceptions_length > 0) { | |
| 1617 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1618 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1619 } | |
| 1620 | |
| 1621 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1622 * | |
| 1623 * Rules for LVT's and LVTT's are: | |
| 1624 * - There can be any number of LVT's and LVTT's. | |
| 1625 * - If there are n LVT's, it is the same as if there was just | |
| 1626 * one LVT containing all the entries from the n LVT's. | |
| 1627 * - There may be no more than one LVT entry per local variable. | |
| 1628 * Two LVT entries are 'equal' if these fields are the same: | |
| 1629 * start_pc, length, name, slot | |
| 1630 * - There may be no more than one LVTT entry per each LVT entry. | |
| 1631 * Each LVTT entry has to match some LVT entry. | |
| 1632 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 1633 */ | |
| 1634 if (total_lvt_length > 0) { | |
| 1635 int tbl_no, idx; | |
| 1636 | |
| 1637 promoted_flags->set_has_localvariable_table(); | |
| 1638 | |
| 1639 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 1640 initialize_hashtable(lvt_Hash); | |
| 1641 | |
| 1642 // To fill LocalVariableTable in | |
| 1643 Classfile_LVT_Element* cf_lvt; | |
| 1644 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 1645 | |
| 1646 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 1647 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 1648 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 1649 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 1650 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 1651 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 1652 && _need_verify | |
| 1653 && _major_version >= JAVA_1_5_VERSION ) { | |
| 1654 clear_hashtable(lvt_Hash); | |
| 1655 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 1656 "entry for '%s' in class file %s", | |
| 1657 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 1658 CHECK_(nullHandle)); | |
| 1659 } | |
| 1660 } | |
| 1661 } | |
| 1662 | |
| 1663 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 1664 Classfile_LVT_Element* cf_lvtt; | |
| 1665 LocalVariableTableElement lvtt_elem; | |
| 1666 | |
| 1667 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 1668 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 1669 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 1670 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 1671 int index = hash(&lvtt_elem); | |
| 1672 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 1673 if (entry == NULL) { | |
| 1674 if (_need_verify) { | |
| 1675 clear_hashtable(lvt_Hash); | |
| 1676 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 1677 "does not match any LVT entry", | |
| 1678 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1679 CHECK_(nullHandle)); | |
| 1680 } | |
| 1681 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 1682 clear_hashtable(lvt_Hash); | |
| 1683 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 1684 "entry for '%s' in class file %s", | |
| 1685 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 1686 CHECK_(nullHandle)); | |
| 1687 } else { | |
| 1688 // to add generic signatures into LocalVariableTable | |
| 1689 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 1690 } | |
| 1691 } | |
| 1692 } | |
| 1693 clear_hashtable(lvt_Hash); | |
| 1694 } | |
| 1695 | |
| 1696 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 1697 runtime_visible_annotations_length, | |
| 1698 runtime_invisible_annotations, | |
| 1699 runtime_invisible_annotations_length, | |
| 1700 CHECK_(nullHandle)); | |
| 1701 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 1702 runtime_visible_parameter_annotations_length, | |
| 1703 runtime_invisible_parameter_annotations, | |
| 1704 runtime_invisible_parameter_annotations_length, | |
| 1705 CHECK_(nullHandle)); | |
| 1706 *method_default_annotations = assemble_annotations(annotation_default, | |
| 1707 annotation_default_length, | |
| 1708 NULL, | |
| 1709 0, | |
| 1710 CHECK_(nullHandle)); | |
| 1711 | |
| 1712 if (name() == vmSymbols::finalize_method_name() && | |
| 1713 signature() == vmSymbols::void_method_signature()) { | |
| 1714 if (m->is_empty_method()) { | |
| 1715 _has_empty_finalizer = true; | |
| 1716 } else { | |
| 1717 _has_finalizer = true; | |
| 1718 } | |
| 1719 } | |
| 1720 if (name() == vmSymbols::object_initializer_name() && | |
| 1721 signature() == vmSymbols::void_method_signature() && | |
| 1722 m->is_vanilla_constructor()) { | |
| 1723 _has_vanilla_constructor = true; | |
| 1724 } | |
| 1725 | |
| 1726 return m; | |
| 1727 } | |
| 1728 | |
| 1729 | |
| 1730 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1731 // from the methods back up to the containing klass. These flag values | |
| 1732 // are added to klass's access_flags. | |
| 1733 | |
| 1734 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 1735 AccessFlags* promoted_flags, | |
| 1736 bool* has_final_method, | |
| 1737 objArrayOop* methods_annotations_oop, | |
| 1738 objArrayOop* methods_parameter_annotations_oop, | |
| 1739 objArrayOop* methods_default_annotations_oop, | |
| 1740 TRAPS) { | |
| 1741 ClassFileStream* cfs = stream(); | |
| 1742 objArrayHandle nullHandle; | |
| 1743 typeArrayHandle method_annotations; | |
| 1744 typeArrayHandle method_parameter_annotations; | |
| 1745 typeArrayHandle method_default_annotations; | |
| 1746 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1747 u2 length = cfs->get_u2_fast(); | |
| 1748 if (length == 0) { | |
| 1749 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 1750 } else { | |
| 1751 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1752 objArrayHandle methods(THREAD, m); | |
| 1753 HandleMark hm(THREAD); | |
| 1754 objArrayHandle methods_annotations; | |
| 1755 objArrayHandle methods_parameter_annotations; | |
| 1756 objArrayHandle methods_default_annotations; | |
| 1757 for (int index = 0; index < length; index++) { | |
| 1758 methodHandle method = parse_method(cp, is_interface, | |
| 1759 promoted_flags, | |
| 1760 &method_annotations, | |
| 1761 &method_parameter_annotations, | |
| 1762 &method_default_annotations, | |
| 1763 CHECK_(nullHandle)); | |
| 1764 if (method->is_final()) { | |
| 1765 *has_final_method = true; | |
| 1766 } | |
| 1767 methods->obj_at_put(index, method()); | |
| 1768 if (method_annotations.not_null()) { | |
| 1769 if (methods_annotations.is_null()) { | |
| 1770 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1771 methods_annotations = objArrayHandle(THREAD, md); | |
| 1772 } | |
| 1773 methods_annotations->obj_at_put(index, method_annotations()); | |
| 1774 } | |
| 1775 if (method_parameter_annotations.not_null()) { | |
| 1776 if (methods_parameter_annotations.is_null()) { | |
| 1777 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1778 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 1779 } | |
| 1780 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 1781 } | |
| 1782 if (method_default_annotations.not_null()) { | |
| 1783 if (methods_default_annotations.is_null()) { | |
| 1784 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1785 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 1786 } | |
| 1787 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 1788 } | |
| 1789 } | |
| 1790 if (_need_verify && length > 1) { | |
| 1791 // Check duplicated methods | |
| 1792 ResourceMark rm(THREAD); | |
| 1793 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1794 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1795 initialize_hashtable(names_and_sigs); | |
| 1796 bool dup = false; | |
| 1797 { | |
| 1798 debug_only(No_Safepoint_Verifier nsv;) | |
| 1799 for (int i = 0; i < length; i++) { | |
| 1800 methodOop m = (methodOop)methods->obj_at(i); | |
| 1801 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 1802 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 1803 dup = true; | |
| 1804 break; | |
| 1805 } | |
| 1806 } | |
| 1807 } | |
| 1808 if (dup) { | |
| 1809 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 1810 CHECK_(nullHandle)); | |
| 1811 } | |
| 1812 } | |
| 1813 | |
| 1814 *methods_annotations_oop = methods_annotations(); | |
| 1815 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 1816 *methods_default_annotations_oop = methods_default_annotations(); | |
| 1817 | |
| 1818 return methods; | |
| 1819 } | |
| 1820 } | |
| 1821 | |
| 1822 | |
| 1823 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 1824 objArrayHandle methods_annotations, | |
| 1825 objArrayHandle methods_parameter_annotations, | |
| 1826 objArrayHandle methods_default_annotations, | |
| 1827 TRAPS) { | |
| 1828 typeArrayHandle nullHandle; | |
| 1829 int length = methods()->length(); | |
| 1830 // If JVMTI original method ordering is enabled we have to | |
| 1831 // remember the original class file ordering. | |
| 1832 // We temporarily use the vtable_index field in the methodOop to store the | |
| 1833 // class file index, so we can read in after calling qsort. | |
| 1834 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1835 for (int index = 0; index < length; index++) { | |
| 1836 methodOop m = methodOop(methods->obj_at(index)); | |
| 1837 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 1838 m->set_vtable_index(index); | |
| 1839 } | |
| 1840 } | |
| 1841 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
| 1842 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
| 1843 methodOopDesc::sort_methods(methods(), | |
| 1844 methods_annotations(), | |
| 1845 methods_parameter_annotations(), | |
| 1846 methods_default_annotations()); | |
| 1847 | |
| 1848 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 1849 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 1850 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 1851 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 1852 for (int index = 0; index < length; index++) { | |
| 1853 methodOop m = methodOop(methods->obj_at(index)); | |
| 1854 int old_index = m->vtable_index(); | |
| 1855 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 1856 method_ordering->int_at_put(index, old_index); | |
| 1857 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 1858 } | |
| 1859 return method_ordering; | |
| 1860 } else { | |
| 1861 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 1862 } | |
| 1863 } | |
| 1864 | |
| 1865 | |
| 1866 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1867 ClassFileStream* cfs = stream(); | |
| 1868 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 1869 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 1870 check_property( | |
| 1871 valid_cp_range(sourcefile_index, cp->length()) && | |
| 1872 cp->tag_at(sourcefile_index).is_utf8(), | |
| 1873 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 1874 sourcefile_index, CHECK); | |
| 1875 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 1876 } | |
| 1877 | |
| 1878 | |
| 1879 | |
| 1880 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 1881 instanceKlassHandle k, | |
| 1882 int length, TRAPS) { | |
| 1883 ClassFileStream* cfs = stream(); | |
| 1884 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 1885 assert(sde_buffer != NULL, "null sde buffer"); | |
| 1886 | |
| 1887 // Don't bother storing it if there is no way to retrieve it | |
| 1888 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 1889 // Optimistically assume that only 1 byte UTF format is used | |
| 1890 // (common case) | |
| 1891 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
| 1892 length, CHECK); | |
| 1893 k->set_source_debug_extension(sde_symbol); | |
| 1894 } | |
| 1895 // Got utf8 string, set stream position forward | |
| 1896 cfs->skip_u1(length, CHECK); | |
| 1897 } | |
| 1898 | |
| 1899 | |
| 1900 // Inner classes can be static, private or protected (classic VM does this) | |
| 1901 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 1902 | |
| 1903 // Return number of classes in the inner classes attribute table | |
| 1904 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1905 ClassFileStream* cfs = stream(); | |
| 1906 cfs->guarantee_more(2, CHECK_0); // length | |
| 1907 u2 length = cfs->get_u2_fast(); | |
| 1908 | |
| 1909 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 1910 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 1911 typeArrayHandle inner_classes(THREAD, ic); | |
| 1912 int index = 0; | |
| 1913 int cp_size = cp->length(); | |
| 1914 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 1915 for (int n = 0; n < length; n++) { | |
| 1916 // Inner class index | |
| 1917 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 1918 check_property( | |
| 1919 inner_class_info_index == 0 || | |
| 1920 (valid_cp_range(inner_class_info_index, cp_size) && | |
| 1921 cp->tag_at(inner_class_info_index).is_klass_reference()), | |
| 1922 "inner_class_info_index %u has bad constant type in class file %s", | |
| 1923 inner_class_info_index, CHECK_0); | |
| 1924 // Outer class index | |
| 1925 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 1926 check_property( | |
| 1927 outer_class_info_index == 0 || | |
| 1928 (valid_cp_range(outer_class_info_index, cp_size) && | |
| 1929 cp->tag_at(outer_class_info_index).is_klass_reference()), | |
| 1930 "outer_class_info_index %u has bad constant type in class file %s", | |
| 1931 outer_class_info_index, CHECK_0); | |
| 1932 // Inner class name | |
| 1933 u2 inner_name_index = cfs->get_u2_fast(); | |
| 1934 check_property( | |
| 1935 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 1936 cp->tag_at(inner_name_index).is_utf8()), | |
| 1937 "inner_name_index %u has bad constant type in class file %s", | |
| 1938 inner_name_index, CHECK_0); | |
| 1939 if (_need_verify) { | |
| 1940 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 1941 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 1942 } | |
| 1943 // Access flags | |
| 1944 AccessFlags inner_access_flags; | |
| 1945 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 1946 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 1947 // Set abstract bit for old class files for backward compatibility | |
| 1948 flags |= JVM_ACC_ABSTRACT; | |
| 1949 } | |
| 1950 verify_legal_class_modifiers(flags, CHECK_0); | |
| 1951 inner_access_flags.set_flags(flags); | |
| 1952 | |
| 1953 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 1954 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 1955 inner_classes->short_at_put(index++, inner_name_index); | |
| 1956 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 1957 } | |
| 1958 | |
| 1959 // 4347400: make sure there's no duplicate entry in the classes array | |
| 1960 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 1961 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 1962 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 1963 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 1964 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 1965 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 1966 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 1967 "Duplicate entry in InnerClasses in class file %s", | |
| 1968 CHECK_0); | |
| 1969 } | |
| 1970 } | |
| 1971 } | |
| 1972 | |
| 1973 // Update instanceKlass with inner class info. | |
| 1974 k->set_inner_classes(inner_classes()); | |
| 1975 return length; | |
| 1976 } | |
| 1977 | |
| 1978 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1979 k->set_is_synthetic(); | |
| 1980 } | |
| 1981 | |
| 1982 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1983 ClassFileStream* cfs = stream(); | |
| 1984 u2 signature_index = cfs->get_u2(CHECK); | |
| 1985 check_property( | |
| 1986 valid_cp_range(signature_index, cp->length()) && | |
| 1987 cp->tag_at(signature_index).is_utf8(), | |
| 1988 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 1989 signature_index, CHECK); | |
| 1990 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 1991 } | |
| 1992 | |
| 1993 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 1994 ClassFileStream* cfs = stream(); | |
| 1995 // Set inner classes attribute to default sentinel | |
| 1996 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 1997 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 1998 u2 attributes_count = cfs->get_u2_fast(); | |
| 1999 bool parsed_sourcefile_attribute = false; | |
| 2000 bool parsed_innerclasses_attribute = false; | |
| 2001 bool parsed_enclosingmethod_attribute = false; | |
| 2002 u1* runtime_visible_annotations = NULL; | |
| 2003 int runtime_visible_annotations_length = 0; | |
| 2004 u1* runtime_invisible_annotations = NULL; | |
| 2005 int runtime_invisible_annotations_length = 0; | |
| 2006 // Iterate over attributes | |
| 2007 while (attributes_count--) { | |
| 2008 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2009 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2010 u4 attribute_length = cfs->get_u4_fast(); | |
| 2011 check_property( | |
| 2012 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2013 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2014 "Attribute name has bad constant pool index %u in class file %s", | |
| 2015 attribute_name_index, CHECK); | |
| 2016 symbolOop tag = cp->symbol_at(attribute_name_index); | |
| 2017 if (tag == vmSymbols::tag_source_file()) { | |
| 2018 // Check for SourceFile tag | |
| 2019 if (_need_verify) { | |
| 2020 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2021 } | |
| 2022 if (parsed_sourcefile_attribute) { | |
| 2023 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2024 } else { | |
| 2025 parsed_sourcefile_attribute = true; | |
| 2026 } | |
| 2027 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2028 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2029 // Check for SourceDebugExtension tag | |
| 2030 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2031 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2032 // Check for InnerClasses tag | |
| 2033 if (parsed_innerclasses_attribute) { | |
| 2034 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2035 } else { | |
| 2036 parsed_innerclasses_attribute = true; | |
| 2037 } | |
| 2038 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2039 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2040 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2041 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2042 } | |
| 2043 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2044 // Check for Synthetic tag | |
| 2045 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2046 if (attribute_length != 0) { | |
| 2047 classfile_parse_error( | |
| 2048 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2049 attribute_length, CHECK); | |
| 2050 } | |
| 2051 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2052 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2053 // Check for Deprecatd tag - 4276120 | |
| 2054 if (attribute_length != 0) { | |
| 2055 classfile_parse_error( | |
| 2056 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2057 attribute_length, CHECK); | |
| 2058 } | |
| 2059 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2060 if (tag == vmSymbols::tag_signature()) { | |
| 2061 if (attribute_length != 2) { | |
| 2062 classfile_parse_error( | |
| 2063 "Wrong Signature attribute length %u in class file %s", | |
| 2064 attribute_length, CHECK); | |
| 2065 } | |
| 2066 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2067 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2068 runtime_visible_annotations_length = attribute_length; | |
| 2069 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2070 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2071 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2072 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2073 runtime_invisible_annotations_length = attribute_length; | |
| 2074 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2075 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2076 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2077 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2078 if (parsed_enclosingmethod_attribute) { | |
| 2079 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2080 } else { | |
| 2081 parsed_enclosingmethod_attribute = true; | |
| 2082 } | |
| 2083 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2084 u2 class_index = cfs->get_u2_fast(); | |
| 2085 u2 method_index = cfs->get_u2_fast(); | |
| 2086 if (class_index == 0) { | |
| 2087 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2088 } | |
| 2089 // Validate the constant pool indices and types | |
| 2090 if (!cp->is_within_bounds(class_index) || | |
| 2091 !cp->tag_at(class_index).is_klass_reference()) { | |
| 2092 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2093 } | |
| 2094 if (method_index != 0 && | |
| 2095 (!cp->is_within_bounds(method_index) || | |
| 2096 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2097 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2098 } | |
| 2099 k->set_enclosing_method_indices(class_index, method_index); | |
| 2100 } else { | |
| 2101 // Unknown attribute | |
| 2102 cfs->skip_u1(attribute_length, CHECK); | |
| 2103 } | |
| 2104 } else { | |
| 2105 // Unknown attribute | |
| 2106 cfs->skip_u1(attribute_length, CHECK); | |
| 2107 } | |
| 2108 } | |
| 2109 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2110 runtime_visible_annotations_length, | |
| 2111 runtime_invisible_annotations, | |
| 2112 runtime_invisible_annotations_length, | |
| 2113 CHECK); | |
| 2114 k->set_class_annotations(annotations()); | |
| 2115 } | |
| 2116 | |
| 2117 | |
| 2118 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2119 int runtime_visible_annotations_length, | |
| 2120 u1* runtime_invisible_annotations, | |
| 2121 int runtime_invisible_annotations_length, TRAPS) { | |
| 2122 typeArrayHandle annotations; | |
| 2123 if (runtime_visible_annotations != NULL || | |
| 2124 runtime_invisible_annotations != NULL) { | |
| 2125 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2126 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2127 annotations = typeArrayHandle(THREAD, anno); | |
| 2128 if (runtime_visible_annotations != NULL) { | |
| 2129 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2130 } | |
| 2131 if (runtime_invisible_annotations != NULL) { | |
| 2132 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2133 } | |
| 2134 } | |
| 2135 return annotations; | |
| 2136 } | |
| 2137 | |
| 2138 | |
| 2139 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2140 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2141 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2142 if (fd->has_initial_value()) { | |
| 2143 BasicType t = fd->field_type(); | |
| 2144 switch (t) { | |
| 2145 case T_BYTE: | |
| 2146 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2147 break; | |
| 2148 case T_BOOLEAN: | |
| 2149 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2150 break; | |
| 2151 case T_CHAR: | |
| 2152 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2153 break; | |
| 2154 case T_SHORT: | |
| 2155 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2156 break; | |
| 2157 case T_INT: | |
| 2158 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2159 break; | |
| 2160 case T_FLOAT: | |
| 2161 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2162 break; | |
| 2163 case T_DOUBLE: | |
| 2164 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2165 break; | |
| 2166 case T_LONG: | |
| 2167 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2168 break; | |
| 2169 case T_OBJECT: | |
| 2170 { | |
| 2171 #ifdef ASSERT | |
| 2172 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
| 2173 assert(fd->signature() == sym, "just checking"); | |
| 2174 #endif | |
| 2175 oop string = fd->string_initial_value(CHECK); | |
| 2176 h_k()->obj_field_put(fd->offset(), string); | |
| 2177 } | |
| 2178 break; | |
| 2179 default: | |
| 2180 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2181 "Illegal ConstantValue attribute in class file"); | |
| 2182 } | |
| 2183 } | |
| 2184 } | |
| 2185 | |
| 2186 | |
| 2187 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2188 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2189 // This code is for compatibility with earlier jdk's that do not | |
| 2190 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2191 // the check for the "discovered" field should issue a warning if | |
| 2192 // the field is not found. For 1.6 this code should be issue a | |
| 2193 // fatal error if the "discovered" field is not found. | |
| 2194 // | |
| 2195 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2196 // next type of non-static oops leaves room for the fake oop. | |
| 2197 // Do not increment next_nonstatic_oop_offset so that the | |
| 2198 // fake oop is place after the java.lang.ref.Reference oop | |
| 2199 // fields. | |
| 2200 // | |
| 2201 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2202 // field. If it is not present, artifically create a field for it. | |
| 2203 // This allows this VM to run on early JDK where the field is not | |
| 2204 // present. | |
| 2205 | |
| 2206 // | |
| 2207 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2208 // next type of non-static oops leaves room for the fake oop. | |
| 2209 // Do not increment next_nonstatic_oop_offset so that the | |
| 2210 // fake oop is place after the java.lang.ref.Reference oop | |
| 2211 // fields. | |
| 2212 // | |
| 2213 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2214 // field. If it is not present, artifically create a field for it. | |
| 2215 // This allows this VM to run on early JDK where the field is not | |
| 2216 // present. | |
| 2217 int reference_sig_index = 0; | |
| 2218 int reference_name_index = 0; | |
| 2219 int reference_index = 0; | |
| 2220 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2221 const int n = (*fields_ptr)()->length(); | |
| 2222 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2223 int name_index = | |
| 2224 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2225 int sig_index = | |
| 2226 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
| 2227 symbolOop f_name = cp->symbol_at(name_index); | |
| 2228 symbolOop f_sig = cp->symbol_at(sig_index); | |
| 2229 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
| 2230 // Save the index for reference signature for later use. | |
| 2231 // The fake discovered field does not entries in the | |
| 2232 // constant pool so the index for its signature cannot | |
| 2233 // be extracted from the constant pool. It will need | |
| 2234 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2235 // so same an index for that signature. | |
| 2236 reference_sig_index = sig_index; | |
| 2237 reference_name_index = name_index; | |
| 2238 reference_index = i; | |
| 2239 } | |
| 2240 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2241 f_sig == vmSymbols::reference_signature()) { | |
| 2242 // The values below are fake but will force extra | |
| 2243 // non-static oop fields and a corresponding non-static | |
| 2244 // oop map block to be allocated. | |
| 2245 extra = 0; | |
| 2246 break; | |
| 2247 } | |
| 2248 } | |
| 2249 if (extra != 0) { | |
| 2250 fac_ptr->nonstatic_oop_count += extra; | |
| 2251 // Add the additional entry to "fields" so that the klass | |
| 2252 // contains the "discoverd" field and the field will be initialized | |
| 2253 // in instances of the object. | |
| 2254 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2255 instanceKlass::next_offset; | |
| 2256 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2257 fields_with_fix_length, CHECK); | |
| 2258 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2259 | |
| 2260 // Take everything from the original but the length. | |
| 2261 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2262 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2263 } | |
| 2264 | |
| 2265 // Add the fake field at the end. | |
| 2266 int i = (*fields_ptr)->length(); | |
| 2267 // There is no name index for the fake "discovered" field nor | |
| 2268 // signature but a signature is needed so that the field will | |
| 2269 // be properly initialized. Use one found for | |
| 2270 // one of the other reference fields. Be sure the index for the | |
| 2271 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2272 // name is checked. That check is by passed for the last nonstatic | |
| 2273 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2274 // this artificial "discovered" field. An assertion checks that | |
| 2275 // the name index is 0. | |
| 2276 assert(reference_index != 0, "Missing signature for reference"); | |
| 2277 | |
| 2278 int j; | |
| 2279 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2280 fields_with_fix->ushort_at_put(i + j, | |
| 2281 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2282 } | |
| 2283 // Clear the public access flag and set the private access flag. | |
| 2284 short flags; | |
| 2285 flags = | |
| 2286 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2287 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2288 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2289 flags = flags | JVM_ACC_PRIVATE; | |
| 2290 AccessFlags access_flags; | |
| 2291 access_flags.set_flags(flags); | |
| 2292 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2293 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2294 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2295 flags); | |
| 2296 | |
| 2297 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2298 == reference_name_index, "The fake reference name is incorrect"); | |
| 2299 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2300 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2301 // The type of the field is stored in the low_offset entry during | |
| 2302 // parsing. | |
| 2303 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2304 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2305 | |
| 2306 // "fields" is allocated in the permanent generation. Disgard | |
| 2307 // it and let it be collected. | |
| 2308 (*fields_ptr) = fields_with_fix; | |
| 2309 } | |
| 2310 return; | |
| 2311 } | |
| 2312 | |
| 2313 | |
| 2314 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2315 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2316 // Add fake fields for java.lang.Class instances | |
| 2317 // | |
| 2318 // This is not particularly nice. We should consider adding a | |
| 2319 // private transient object field at the Java level to | |
| 2320 // java.lang.Class. Alternatively we could add a subclass of | |
| 2321 // instanceKlass which provides an accessor and size computer for | |
| 2322 // this field, but that appears to be more code than this hack. | |
| 2323 // | |
| 2324 // NOTE that we wedge these in at the beginning rather than the | |
| 2325 // end of the object because the Class layout changed between JDK | |
| 2326 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2327 // nonstatic oop fields were added at the Java level. The offsets | |
| 2328 // of these fake fields can't change between these two JDK | |
| 2329 // versions because when the offsets are computed at bootstrap | |
| 2330 // time we don't know yet which version of the JDK we're running in. | |
| 2331 | |
| 2332 // The values below are fake but will force two non-static oop fields and | |
| 2333 // a corresponding non-static oop map block to be allocated. | |
| 2334 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2335 fac_ptr->nonstatic_oop_count += extra; | |
| 2336 } | |
| 2337 | |
| 2338 | |
| 2339 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2340 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2341 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2342 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2343 // location where the real java fields are placed. | |
| 2344 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
|
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2345 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2346 } |
| 2347 | |
| 2348 | |
| 2349 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, | |
| 2350 Handle class_loader, | |
| 2351 Handle protection_domain, | |
| 2352 symbolHandle& parsed_name, | |
| 2353 TRAPS) { | |
| 2354 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2355 // have modified it | |
| 2356 unsigned char *cached_class_file_bytes = NULL; | |
| 2357 jint cached_class_file_length; | |
| 2358 | |
| 2359 ClassFileStream* cfs = stream(); | |
| 2360 // Timing | |
| 2361 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
| 2362 | |
| 2363 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
| 2364 | |
| 2365 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2366 unsigned char* ptr = cfs->buffer(); | |
| 2367 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2368 | |
| 2369 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2370 &ptr, &end_ptr, | |
| 2371 &cached_class_file_bytes, | |
| 2372 &cached_class_file_length); | |
| 2373 | |
| 2374 if (ptr != cfs->buffer()) { | |
| 2375 // JVMTI agent has modified class file data. | |
| 2376 // Set new class file stream using JVMTI agent modified | |
| 2377 // class file data. | |
| 2378 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2379 set_stream(cfs); | |
| 2380 } | |
| 2381 } | |
| 2382 | |
| 2383 | |
| 2384 instanceKlassHandle nullHandle; | |
| 2385 | |
| 2386 // Figure out whether we can skip format checking (matching classic VM behavior) | |
| 2387 _need_verify = Verifier::should_verify_for(class_loader()); | |
| 2388 | |
| 2389 // Set the verify flag in stream | |
| 2390 cfs->set_verify(_need_verify); | |
| 2391 | |
| 2392 // Save the class file name for easier error message printing. | |
| 2393 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
| 2394 | |
| 2395 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2396 // Magic value | |
| 2397 u4 magic = cfs->get_u4_fast(); | |
| 2398 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2399 "Incompatible magic value %u in class file %s", | |
| 2400 magic, CHECK_(nullHandle)); | |
| 2401 | |
| 2402 // Version numbers | |
| 2403 u2 minor_version = cfs->get_u2_fast(); | |
| 2404 u2 major_version = cfs->get_u2_fast(); | |
| 2405 | |
| 2406 // Check version numbers - we check this even with verifier off | |
| 2407 if (!is_supported_version(major_version, minor_version)) { | |
| 2408 if (name.is_null()) { | |
| 2409 Exceptions::fthrow( | |
| 2410 THREAD_AND_LOCATION, | |
| 2411 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2412 "Unsupported major.minor version %u.%u", | |
| 2413 major_version, | |
| 2414 minor_version); | |
| 2415 } else { | |
| 2416 ResourceMark rm(THREAD); | |
| 2417 Exceptions::fthrow( | |
| 2418 THREAD_AND_LOCATION, | |
| 2419 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
| 2420 "%s : Unsupported major.minor version %u.%u", | |
| 2421 name->as_C_string(), | |
| 2422 major_version, | |
| 2423 minor_version); | |
| 2424 } | |
| 2425 return nullHandle; | |
| 2426 } | |
| 2427 | |
| 2428 _major_version = major_version; | |
| 2429 _minor_version = minor_version; | |
| 2430 | |
| 2431 | |
| 2432 // Check if verification needs to be relaxed for this class file | |
| 2433 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2434 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2435 | |
| 2436 // Constant pool | |
| 2437 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
| 2438 int cp_size = cp->length(); | |
| 2439 | |
| 2440 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2441 | |
| 2442 // Access flags | |
| 2443 AccessFlags access_flags; | |
| 2444 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2445 | |
| 2446 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2447 // Set abstract bit for old class files for backward compatibility | |
| 2448 flags |= JVM_ACC_ABSTRACT; | |
| 2449 } | |
| 2450 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2451 access_flags.set_flags(flags); | |
| 2452 | |
| 2453 // This class and superclass | |
| 2454 instanceKlassHandle super_klass; | |
| 2455 u2 this_class_index = cfs->get_u2_fast(); | |
| 2456 check_property( | |
| 2457 valid_cp_range(this_class_index, cp_size) && | |
| 2458 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2459 "Invalid this class index %u in constant pool in class file %s", | |
| 2460 this_class_index, CHECK_(nullHandle)); | |
| 2461 | |
| 2462 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
| 2463 assert(class_name.not_null(), "class_name can't be null"); | |
| 2464 | |
| 2465 // It's important to set parsed_name *before* resolving the super class. | |
| 2466 // (it's used for cleanup by the caller if parsing fails) | |
| 2467 parsed_name = class_name; | |
| 2468 | |
| 2469 // Update _class_name which could be null previously to be class_name | |
| 2470 _class_name = class_name; | |
| 2471 | |
| 2472 // Don't need to check whether this class name is legal or not. | |
| 2473 // It has been checked when constant pool is parsed. | |
| 2474 // However, make sure it is not an array type. | |
| 2475 if (_need_verify) { | |
| 2476 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2477 "Bad class name in class file %s", | |
| 2478 CHECK_(nullHandle)); | |
| 2479 } | |
| 2480 | |
| 2481 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 2482 | |
| 2483 // release all handles when parsing is done | |
| 2484 { HandleMark hm(THREAD); | |
| 2485 | |
| 2486 // Checks if name in class file matches requested name | |
| 2487 if (name.not_null() && class_name() != name()) { | |
| 2488 ResourceMark rm(THREAD); | |
| 2489 Exceptions::fthrow( | |
| 2490 THREAD_AND_LOCATION, | |
| 2491 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
| 2492 "%s (wrong name: %s)", | |
| 2493 name->as_C_string(), | |
| 2494 class_name->as_C_string() | |
| 2495 ); | |
| 2496 return nullHandle; | |
| 2497 } | |
| 2498 | |
| 2499 if (TraceClassLoadingPreorder) { | |
| 2500 tty->print("[Loading %s", name()->as_klass_external_name()); | |
| 2501 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
| 2502 tty->print_cr("]"); | |
| 2503 } | |
| 2504 | |
| 2505 u2 super_class_index = cfs->get_u2_fast(); | |
| 2506 if (super_class_index == 0) { | |
| 2507 check_property(class_name() == vmSymbols::java_lang_Object(), | |
| 2508 "Invalid superclass index %u in class file %s", | |
| 2509 super_class_index, | |
| 2510 CHECK_(nullHandle)); | |
| 2511 } else { | |
| 2512 check_property(valid_cp_range(super_class_index, cp_size) && | |
| 2513 cp->tag_at(super_class_index).is_unresolved_klass(), | |
| 2514 "Invalid superclass index %u in class file %s", | |
| 2515 super_class_index, | |
| 2516 CHECK_(nullHandle)); | |
| 2517 // The class name should be legal because it is checked when parsing constant pool. | |
| 2518 // However, make sure it is not an array type. | |
| 2519 if (_need_verify) { | |
| 2520 guarantee_property(cp->unresolved_klass_at(super_class_index)->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 2521 "Bad superclass name in class file %s", CHECK_(nullHandle)); | |
| 2522 } | |
| 2523 } | |
| 2524 | |
| 2525 // Interfaces | |
| 2526 u2 itfs_len = cfs->get_u2_fast(); | |
| 2527 objArrayHandle local_interfaces; | |
| 2528 if (itfs_len == 0) { | |
| 2529 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2530 } else { | |
| 2531 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
| 2532 } | |
| 2533 | |
| 2534 // Fields (offsets are filled in later) | |
| 2535 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 2536 objArrayHandle fields_annotations; | |
| 2537 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 2538 // Methods | |
| 2539 bool has_final_method = false; | |
| 2540 AccessFlags promoted_flags; | |
| 2541 promoted_flags.set_flags(0); | |
| 2542 // These need to be oop pointers because they are allocated lazily | |
| 2543 // inside parse_methods inside a nested HandleMark | |
| 2544 objArrayOop methods_annotations_oop = NULL; | |
| 2545 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 2546 objArrayOop methods_default_annotations_oop = NULL; | |
| 2547 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 2548 &promoted_flags, | |
| 2549 &has_final_method, | |
| 2550 &methods_annotations_oop, | |
| 2551 &methods_parameter_annotations_oop, | |
| 2552 &methods_default_annotations_oop, | |
| 2553 CHECK_(nullHandle)); | |
| 2554 | |
| 2555 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 2556 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 2557 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 2558 | |
| 2559 // We check super class after class file is parsed and format is checked | |
| 2560 if (super_class_index > 0) { | |
| 2561 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); | |
| 2562 if (access_flags.is_interface()) { | |
| 2563 // Before attempting to resolve the superclass, check for class format | |
| 2564 // errors not checked yet. | |
| 2565 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
| 2566 "Interfaces must have java.lang.Object as superclass in class file %s", | |
| 2567 CHECK_(nullHandle)); | |
| 2568 } | |
| 2569 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 2570 sk, | |
| 2571 class_loader, | |
| 2572 protection_domain, | |
| 2573 true, | |
| 2574 CHECK_(nullHandle)); | |
| 2575 KlassHandle kh (THREAD, k); | |
| 2576 super_klass = instanceKlassHandle(THREAD, kh()); | |
| 2577 if (super_klass->is_interface()) { | |
| 2578 ResourceMark rm(THREAD); | |
| 2579 Exceptions::fthrow( | |
| 2580 THREAD_AND_LOCATION, | |
| 2581 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
| 2582 "class %s has interface %s as super class", | |
| 2583 class_name->as_klass_external_name(), | |
| 2584 super_klass->external_name() | |
| 2585 ); | |
| 2586 return nullHandle; | |
| 2587 } | |
| 2588 // Make sure super class is not final | |
| 2589 if (super_klass->is_final()) { | |
| 2590 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 2591 } | |
| 2592 } | |
| 2593 | |
| 2594 // Compute the transitive list of all unique interfaces implemented by this class | |
| 2595 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 2596 | |
| 2597 // sort methods | |
| 2598 typeArrayHandle method_ordering = sort_methods(methods, | |
| 2599 methods_annotations, | |
| 2600 methods_parameter_annotations, | |
| 2601 methods_default_annotations, | |
| 2602 CHECK_(nullHandle)); | |
| 2603 | |
| 2604 // promote flags from parse_methods() to the klass' flags | |
| 2605 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 2606 | |
| 2607 // Size of Java vtable (in words) | |
| 2608 int vtable_size = 0; | |
| 2609 int itable_size = 0; | |
| 2610 int num_miranda_methods = 0; | |
| 2611 | |
| 2612 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 2613 num_miranda_methods, | |
| 2614 super_klass(), | |
| 2615 methods(), | |
| 2616 access_flags, | |
| 2617 class_loader(), | |
| 2618 class_name(), | |
| 2619 local_interfaces()); | |
| 2620 | |
| 2621 // Size of Java itable (in words) | |
| 2622 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 2623 | |
| 2624 // Field size and offset computation | |
| 2625 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 2626 #ifndef PRODUCT | |
| 2627 int orig_nonstatic_field_size = 0; | |
| 2628 #endif | |
| 2629 int static_field_size = 0; | |
| 2630 int next_static_oop_offset; | |
| 2631 int next_static_double_offset; | |
| 2632 int next_static_word_offset; | |
| 2633 int next_static_short_offset; | |
| 2634 int next_static_byte_offset; | |
| 2635 int next_static_type_offset; | |
| 2636 int next_nonstatic_oop_offset; | |
| 2637 int next_nonstatic_double_offset; | |
| 2638 int next_nonstatic_word_offset; | |
| 2639 int next_nonstatic_short_offset; | |
| 2640 int next_nonstatic_byte_offset; | |
| 2641 int next_nonstatic_type_offset; | |
| 2642 int first_nonstatic_oop_offset; | |
| 2643 int first_nonstatic_field_offset; | |
| 2644 int next_nonstatic_field_offset; | |
| 2645 | |
| 2646 // Calculate the starting byte offsets | |
| 2647 next_static_oop_offset = (instanceKlass::header_size() + | |
| 2648 align_object_offset(vtable_size) + | |
| 2649 align_object_offset(itable_size)) * wordSize; | |
| 2650 next_static_double_offset = next_static_oop_offset + | |
|
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2651 (fac.static_oop_count * heapOopSize); |
| 0 | 2652 if ( fac.static_double_count && |
| 2653 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 2654 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 2655 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 2656 } | |
| 2657 | |
| 2658 next_static_word_offset = next_static_double_offset + | |
| 2659 (fac.static_double_count * BytesPerLong); | |
| 2660 next_static_short_offset = next_static_word_offset + | |
| 2661 (fac.static_word_count * BytesPerInt); | |
| 2662 next_static_byte_offset = next_static_short_offset + | |
| 2663 (fac.static_short_count * BytesPerShort); | |
| 2664 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 2665 fac.static_byte_count ), wordSize ); | |
| 2666 static_field_size = (next_static_type_offset - | |
| 2667 next_static_oop_offset) / wordSize; | |
| 2668 first_nonstatic_field_offset = (instanceOopDesc::header_size() + | |
| 2669 nonstatic_field_size) * wordSize; | |
| 2670 next_nonstatic_field_offset = first_nonstatic_field_offset; | |
| 2671 | |
| 2672 // Add fake fields for java.lang.Class instances (also see below) | |
| 2673 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2674 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
| 2675 } | |
| 2676 | |
| 2677 // Add a fake "discovered" field if it is not present | |
| 2678 // for compatibility with earlier jdk's. | |
| 2679 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
| 2680 && class_loader.is_null()) { | |
| 2681 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 2682 } | |
| 2683 // end of "discovered" field compactibility fix | |
| 2684 | |
| 2685 int nonstatic_double_count = fac.nonstatic_double_count; | |
| 2686 int nonstatic_word_count = fac.nonstatic_word_count; | |
| 2687 int nonstatic_short_count = fac.nonstatic_short_count; | |
| 2688 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
| 2689 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
| 2690 | |
|
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2691 bool super_has_nonstatic_fields = |
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2692 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2693 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2694 ((nonstatic_double_count + nonstatic_word_count + |
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2695 nonstatic_short_count + nonstatic_byte_count + |
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2696 nonstatic_oop_count) != 0); |
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2697 |
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2698 |
| 0 | 2699 // Prepare list of oops for oop maps generation. |
| 2700 u2* nonstatic_oop_offsets; | |
| 2701 u2* nonstatic_oop_length; | |
| 2702 int nonstatic_oop_map_count = 0; | |
| 2703 | |
| 2704 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2705 THREAD, u2, nonstatic_oop_count+1); | |
| 2706 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2707 THREAD, u2, nonstatic_oop_count+1); | |
| 2708 | |
| 2709 // Add fake fields for java.lang.Class instances (also see above). | |
| 2710 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
| 2711 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
| 2712 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
| 2713 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
| 2714 int fake_oop_count = (( next_nonstatic_field_offset - | |
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2715 first_nonstatic_field_offset ) / heapOopSize); |
| 0 | 2716 nonstatic_oop_length [0] = (u2)fake_oop_count; |
| 2717 nonstatic_oop_map_count = 1; | |
| 2718 nonstatic_oop_count -= fake_oop_count; | |
| 2719 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
| 2720 } else { | |
| 2721 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 2722 } | |
| 2723 | |
| 2724 #ifndef PRODUCT | |
| 2725 if( PrintCompactFieldsSavings ) { | |
| 2726 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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2727 (nonstatic_oop_count * heapOopSize); |
| 0 | 2728 if ( nonstatic_double_count > 0 ) { |
| 2729 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 2730 } | |
| 2731 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 2732 (nonstatic_double_count * BytesPerLong); | |
| 2733 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 2734 (nonstatic_word_count * BytesPerInt); | |
| 2735 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 2736 (nonstatic_short_count * BytesPerShort); | |
| 2737 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
| 2738 nonstatic_byte_count ), wordSize ); | |
| 2739 orig_nonstatic_field_size = nonstatic_field_size + | |
| 2740 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/wordSize); | |
| 2741 } | |
| 2742 #endif | |
| 2743 bool compact_fields = CompactFields; | |
| 2744 int allocation_style = FieldsAllocationStyle; | |
| 2745 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
| 2746 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
| 2747 allocation_style = 1; // Optimistic | |
| 2748 } | |
| 2749 | |
| 2750 // The next classes have predefined hard-coded fields offsets | |
| 2751 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 2752 // Use default fields allocation order for them. | |
| 2753 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
| 2754 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
| 2755 class_name() == vmSymbols::java_lang_Class() || | |
| 2756 class_name() == vmSymbols::java_lang_ClassLoader() || | |
| 2757 class_name() == vmSymbols::java_lang_ref_Reference() || | |
| 2758 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
| 2759 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
| 2760 class_name() == vmSymbols::java_lang_String() || | |
|
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2761 class_name() == vmSymbols::java_lang_Throwable() || |
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2762 class_name() == vmSymbols::java_lang_Boolean() || |
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2763 class_name() == vmSymbols::java_lang_Character() || |
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2764 class_name() == vmSymbols::java_lang_Float() || |
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2765 class_name() == vmSymbols::java_lang_Double() || |
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2766 class_name() == vmSymbols::java_lang_Byte() || |
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2767 class_name() == vmSymbols::java_lang_Short() || |
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2768 class_name() == vmSymbols::java_lang_Integer() || |
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2769 class_name() == vmSymbols::java_lang_Long())) { |
| 0 | 2770 allocation_style = 0; // Allocate oops first |
| 2771 compact_fields = false; // Don't compact fields | |
| 2772 } | |
| 2773 | |
| 2774 if( allocation_style == 0 ) { | |
| 2775 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 2776 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 2777 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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2778 (nonstatic_oop_count * heapOopSize); |
| 0 | 2779 } else if( allocation_style == 1 ) { |
| 2780 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 2781 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
| 2782 } else { | |
| 2783 ShouldNotReachHere(); | |
| 2784 } | |
| 2785 | |
| 2786 int nonstatic_oop_space_count = 0; | |
| 2787 int nonstatic_word_space_count = 0; | |
| 2788 int nonstatic_short_space_count = 0; | |
| 2789 int nonstatic_byte_space_count = 0; | |
| 2790 int nonstatic_oop_space_offset; | |
| 2791 int nonstatic_word_space_offset; | |
| 2792 int nonstatic_short_space_offset; | |
| 2793 int nonstatic_byte_space_offset; | |
| 2794 | |
|
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2795 bool compact_into_header = (UseCompressedOops && |
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2796 allocation_style == 1 && compact_fields && |
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2797 !super_has_nonstatic_fields); |
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2798 |
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2799 if( compact_into_header || nonstatic_double_count > 0 ) { |
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2800 int offset; |
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2801 // Pack something in with the header if no super klass has done so. |
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2802 if (compact_into_header) { |
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2803 offset = oopDesc::klass_gap_offset_in_bytes(); |
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2804 } else { |
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2805 offset = next_nonstatic_double_offset; |
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2806 } |
| 0 | 2807 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 2808 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 2809 // Allocate available fields into the gap before double field. | |
| 2810 int length = next_nonstatic_double_offset - offset; | |
| 2811 assert(length == BytesPerInt, ""); | |
| 2812 nonstatic_word_space_offset = offset; | |
| 2813 if( nonstatic_word_count > 0 ) { | |
| 2814 nonstatic_word_count -= 1; | |
| 2815 nonstatic_word_space_count = 1; // Only one will fit | |
| 2816 length -= BytesPerInt; | |
| 2817 offset += BytesPerInt; | |
| 2818 } | |
| 2819 nonstatic_short_space_offset = offset; | |
| 2820 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 2821 nonstatic_short_count -= 1; | |
| 2822 nonstatic_short_space_count += 1; | |
| 2823 length -= BytesPerShort; | |
| 2824 offset += BytesPerShort; | |
| 2825 } | |
| 2826 nonstatic_byte_space_offset = offset; | |
| 2827 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 2828 nonstatic_byte_count -= 1; | |
| 2829 nonstatic_byte_space_count += 1; | |
| 2830 length -= 1; | |
| 2831 } | |
| 2832 // Allocate oop field in the gap if there are no other fields for that. | |
| 2833 nonstatic_oop_space_offset = offset; | |
|
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2834 if(!compact_into_header && length >= heapOopSize && |
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2835 nonstatic_oop_count > 0 && |
| 0 | 2836 allocation_style != 0 ) { // when oop fields not first |
| 2837 nonstatic_oop_count -= 1; | |
| 2838 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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2839 length -= heapOopSize; |
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2840 offset += heapOopSize; |
| 0 | 2841 } |
| 2842 } | |
| 2843 } | |
| 2844 | |
| 2845 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 2846 (nonstatic_double_count * BytesPerLong); | |
| 2847 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 2848 (nonstatic_word_count * BytesPerInt); | |
| 2849 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 2850 (nonstatic_short_count * BytesPerShort); | |
| 2851 | |
| 2852 int notaligned_offset; | |
| 2853 if( allocation_style == 0 ) { | |
| 2854 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 2855 } else { // allocation_style == 1 | |
| 2856 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 2857 if( nonstatic_oop_count > 0 ) { | |
| 2858 notaligned_offset = next_nonstatic_oop_offset; | |
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2859 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 2860 } |
|
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2861 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 2862 } |
| 2863 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); | |
| 2864 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset | |
| 2865 - first_nonstatic_field_offset)/wordSize); | |
| 2866 | |
| 2867 // Iterate over fields again and compute correct offsets. | |
| 2868 // The field allocation type was temporarily stored in the offset slot. | |
| 2869 // oop fields are located before non-oop fields (static and non-static). | |
| 2870 int len = fields->length(); | |
| 2871 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 2872 int real_offset; | |
| 2873 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
| 2874 switch (atype) { | |
| 2875 case STATIC_OOP: | |
| 2876 real_offset = next_static_oop_offset; | |
|
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2877 next_static_oop_offset += heapOopSize; |
| 0 | 2878 break; |
| 2879 case STATIC_BYTE: | |
| 2880 real_offset = next_static_byte_offset; | |
| 2881 next_static_byte_offset += 1; | |
| 2882 break; | |
| 2883 case STATIC_SHORT: | |
| 2884 real_offset = next_static_short_offset; | |
| 2885 next_static_short_offset += BytesPerShort; | |
| 2886 break; | |
| 2887 case STATIC_WORD: | |
| 2888 real_offset = next_static_word_offset; | |
| 2889 next_static_word_offset += BytesPerInt; | |
| 2890 break; | |
| 2891 case STATIC_ALIGNED_DOUBLE: | |
| 2892 case STATIC_DOUBLE: | |
| 2893 real_offset = next_static_double_offset; | |
| 2894 next_static_double_offset += BytesPerLong; | |
| 2895 break; | |
| 2896 case NONSTATIC_OOP: | |
| 2897 if( nonstatic_oop_space_count > 0 ) { | |
| 2898 real_offset = nonstatic_oop_space_offset; | |
|
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2899 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 2900 nonstatic_oop_space_count -= 1; |
| 2901 } else { | |
| 2902 real_offset = next_nonstatic_oop_offset; | |
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2903 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 2904 } |
| 2905 // Update oop maps | |
| 2906 if( nonstatic_oop_map_count > 0 && | |
| 2907 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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2908 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
| 0 | 2909 // Extend current oop map |
| 2910 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
| 2911 } else { | |
| 2912 // Create new oop map | |
| 2913 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
| 2914 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
| 2915 nonstatic_oop_map_count += 1; | |
| 2916 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 2917 first_nonstatic_oop_offset = real_offset; | |
| 2918 } | |
| 2919 } | |
| 2920 break; | |
| 2921 case NONSTATIC_BYTE: | |
| 2922 if( nonstatic_byte_space_count > 0 ) { | |
| 2923 real_offset = nonstatic_byte_space_offset; | |
| 2924 nonstatic_byte_space_offset += 1; | |
| 2925 nonstatic_byte_space_count -= 1; | |
| 2926 } else { | |
| 2927 real_offset = next_nonstatic_byte_offset; | |
| 2928 next_nonstatic_byte_offset += 1; | |
| 2929 } | |
| 2930 break; | |
| 2931 case NONSTATIC_SHORT: | |
| 2932 if( nonstatic_short_space_count > 0 ) { | |
| 2933 real_offset = nonstatic_short_space_offset; | |
| 2934 nonstatic_short_space_offset += BytesPerShort; | |
| 2935 nonstatic_short_space_count -= 1; | |
| 2936 } else { | |
| 2937 real_offset = next_nonstatic_short_offset; | |
| 2938 next_nonstatic_short_offset += BytesPerShort; | |
| 2939 } | |
| 2940 break; | |
| 2941 case NONSTATIC_WORD: | |
| 2942 if( nonstatic_word_space_count > 0 ) { | |
| 2943 real_offset = nonstatic_word_space_offset; | |
| 2944 nonstatic_word_space_offset += BytesPerInt; | |
| 2945 nonstatic_word_space_count -= 1; | |
| 2946 } else { | |
| 2947 real_offset = next_nonstatic_word_offset; | |
| 2948 next_nonstatic_word_offset += BytesPerInt; | |
| 2949 } | |
| 2950 break; | |
| 2951 case NONSTATIC_ALIGNED_DOUBLE: | |
| 2952 case NONSTATIC_DOUBLE: | |
| 2953 real_offset = next_nonstatic_double_offset; | |
| 2954 next_nonstatic_double_offset += BytesPerLong; | |
| 2955 break; | |
| 2956 default: | |
| 2957 ShouldNotReachHere(); | |
| 2958 } | |
| 2959 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
| 2960 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
| 2961 } | |
| 2962 | |
| 2963 // Size of instances | |
| 2964 int instance_size; | |
| 2965 | |
| 2966 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); | |
| 2967 | |
| 2968 assert(instance_size == align_object_size(instanceOopDesc::header_size() + nonstatic_field_size), "consistent layout helper value"); | |
| 2969 | |
| 2970 // Size of non-static oop map blocks (in words) allocated at end of klass | |
| 2971 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
| 2972 | |
| 2973 // Compute reference type | |
| 2974 ReferenceType rt; | |
| 2975 if (super_klass() == NULL) { | |
| 2976 rt = REF_NONE; | |
| 2977 } else { | |
| 2978 rt = super_klass->reference_type(); | |
| 2979 } | |
| 2980 | |
| 2981 // We can now create the basic klassOop for this klass | |
| 2982 klassOop ik = oopFactory::new_instanceKlass( | |
| 2983 vtable_size, itable_size, | |
| 2984 static_field_size, nonstatic_oop_map_size, | |
| 2985 rt, CHECK_(nullHandle)); | |
| 2986 instanceKlassHandle this_klass (THREAD, ik); | |
| 2987 | |
| 2988 assert(this_klass->static_field_size() == static_field_size && | |
| 2989 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
| 2990 | |
| 2991 // Fill in information already parsed | |
| 2992 this_klass->set_access_flags(access_flags); | |
| 2993 jint lh = Klass::instance_layout_helper(instance_size, false); | |
| 2994 this_klass->set_layout_helper(lh); | |
| 2995 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 2996 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 2997 // Not yet: supers are done below to support the new subtype-checking fields | |
| 2998 //this_klass->set_super(super_klass()); | |
| 2999 this_klass->set_class_loader(class_loader()); | |
| 3000 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
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3001 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
| 0 | 3002 this_klass->set_static_oop_field_size(fac.static_oop_count); |
| 3003 cp->set_pool_holder(this_klass()); | |
| 3004 this_klass->set_constants(cp()); | |
| 3005 this_klass->set_local_interfaces(local_interfaces()); | |
| 3006 this_klass->set_fields(fields()); | |
| 3007 this_klass->set_methods(methods()); | |
| 3008 if (has_final_method) { | |
| 3009 this_klass->set_has_final_method(); | |
| 3010 } | |
| 3011 this_klass->set_method_ordering(method_ordering()); | |
| 3012 this_klass->set_initial_method_idnum(methods->length()); | |
| 3013 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 3014 this_klass->set_protection_domain(protection_domain()); | |
| 3015 this_klass->set_fields_annotations(fields_annotations()); | |
| 3016 this_klass->set_methods_annotations(methods_annotations()); | |
| 3017 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3018 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3019 | |
| 3020 this_klass->set_minor_version(minor_version); | |
| 3021 this_klass->set_major_version(major_version); | |
| 3022 | |
| 3023 if (cached_class_file_bytes != NULL) { | |
| 3024 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3025 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3026 cached_class_file_length); | |
| 3027 } | |
| 3028 | |
| 3029 // Miranda methods | |
| 3030 if ((num_miranda_methods > 0) || | |
| 3031 // if this class introduced new miranda methods or | |
| 3032 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3033 // super class exists and this class inherited miranda methods | |
| 3034 ) { | |
| 3035 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3036 } | |
| 3037 | |
| 3038 // Additional attributes | |
| 3039 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3040 | |
| 3041 // Make sure this is the end of class file stream | |
| 3042 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3043 | |
| 3044 // Initialize static fields | |
| 3045 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3046 | |
| 3047 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3048 // Compute transitive closure of interfaces this class implements | |
| 3049 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3050 | |
| 3051 // Fill in information needed to compute superclasses. | |
| 3052 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3053 | |
| 3054 // Initialize itable offset tables | |
| 3055 klassItable::setup_itable_offset_table(this_klass); | |
| 3056 | |
| 3057 // Do final class setup | |
| 3058 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
| 3059 | |
| 3060 set_precomputed_flags(this_klass); | |
| 3061 | |
| 3062 // reinitialize modifiers, using the InnerClasses attribute | |
| 3063 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3064 this_klass->set_modifier_flags(computed_modifiers); | |
| 3065 | |
| 3066 // check if this class can access its super class | |
| 3067 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3068 | |
| 3069 // check if this class can access its superinterfaces | |
| 3070 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3071 | |
| 3072 // check if this class overrides any final method | |
| 3073 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3074 | |
| 3075 // check that if this class is an interface then it doesn't have static methods | |
| 3076 if (this_klass->is_interface()) { | |
| 3077 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3078 } | |
| 3079 | |
| 3080 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3081 false /* not shared class */); | |
| 3082 | |
| 3083 if (TraceClassLoading) { | |
| 3084 // print in a single call to reduce interleaving of output | |
| 3085 if (cfs->source() != NULL) { | |
| 3086 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3087 cfs->source()); | |
| 3088 } else if (class_loader.is_null()) { | |
| 3089 if (THREAD->is_Java_thread()) { | |
| 3090 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3091 tty->print("[Loaded %s by instance of %s]\n", | |
| 3092 this_klass->external_name(), | |
| 3093 instanceKlass::cast(caller)->external_name()); | |
| 3094 } else { | |
| 3095 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3096 } | |
| 3097 } else { | |
| 3098 ResourceMark rm; | |
| 3099 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3100 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3101 } | |
| 3102 } | |
| 3103 | |
| 3104 if (TraceClassResolution) { | |
| 3105 // print out the superclass. | |
| 3106 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3107 if (this_klass->java_super() != NULL) { | |
| 3108 tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); | |
| 3109 } | |
| 3110 // print out each of the interface classes referred to by this class. | |
| 3111 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3112 if (!local_interfaces.is_null()) { | |
| 3113 int length = local_interfaces->length(); | |
| 3114 for (int i = 0; i < length; i++) { | |
| 3115 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3116 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3117 const char * to = to_class->external_name(); | |
| 3118 tty->print("RESOLVE %s %s\n", from, to); | |
| 3119 } | |
| 3120 } | |
| 3121 } | |
| 3122 | |
| 3123 #ifndef PRODUCT | |
| 3124 if( PrintCompactFieldsSavings ) { | |
| 3125 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
| 3126 tty->print("[Saved %d of %3d words in %s]\n", | |
| 3127 orig_nonstatic_field_size - nonstatic_field_size, | |
| 3128 orig_nonstatic_field_size, this_klass->external_name()); | |
| 3129 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { | |
| 3130 tty->print("[Wasted %d over %3d words in %s]\n", | |
| 3131 nonstatic_field_size - orig_nonstatic_field_size, | |
| 3132 orig_nonstatic_field_size, this_klass->external_name()); | |
| 3133 } | |
| 3134 } | |
| 3135 #endif | |
| 3136 | |
| 3137 // preserve result across HandleMark | |
| 3138 preserve_this_klass = this_klass(); | |
| 3139 } | |
| 3140 | |
| 3141 // Create new handle outside HandleMark | |
| 3142 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3143 debug_only(this_klass->as_klassOop()->verify();) | |
| 3144 | |
| 3145 return this_klass; | |
| 3146 } | |
| 3147 | |
| 3148 | |
| 3149 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
| 3150 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
| 3151 if (nonstatic_oop_map_count > 0) { | |
| 3152 // We have oops to add to map | |
| 3153 if (map_size == 0) { | |
| 3154 map_size = nonstatic_oop_map_count; | |
| 3155 } else { | |
| 3156 // Check whether we should add a new map block or whether the last one can be extended | |
| 3157 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
| 3158 OopMapBlock* last_map = first_map + map_size - 1; | |
| 3159 | |
|
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diff
changeset
|
3160 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
| 0 | 3161 if (next_offset == first_nonstatic_oop_offset) { |
| 3162 // There is no gap bettwen superklass's last oop field and first | |
| 3163 // local oop field, merge maps. | |
| 3164 nonstatic_oop_map_count -= 1; | |
| 3165 } else { | |
| 3166 // Superklass didn't end with a oop field, add extra maps | |
| 3167 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
| 3168 } | |
| 3169 map_size += nonstatic_oop_map_count; | |
| 3170 } | |
| 3171 } | |
| 3172 return map_size; | |
| 3173 } | |
| 3174 | |
| 3175 | |
| 3176 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
| 3177 int nonstatic_oop_map_count, | |
| 3178 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
| 3179 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
| 3180 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
| 3181 instanceKlass* super = k->superklass(); | |
| 3182 if (super != NULL) { | |
| 3183 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
| 3184 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
| 3185 // Copy maps from superklass | |
| 3186 while (super_oop_map_size-- > 0) { | |
| 3187 *this_oop_map++ = *super_oop_map++; | |
| 3188 } | |
| 3189 } | |
| 3190 if (nonstatic_oop_map_count > 0) { | |
| 3191 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
| 3192 // Calculated in compute_oop_map_size() number of oop maps is less then | |
| 3193 // collected oop maps since there is no gap between superklass's last oop | |
| 3194 // field and first local oop field. Extend the last oop map copied | |
| 3195 // from the superklass instead of creating new one. | |
| 3196 nonstatic_oop_map_count--; | |
| 3197 nonstatic_oop_offsets++; | |
| 3198 this_oop_map--; | |
| 3199 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
| 3200 this_oop_map++; | |
| 3201 } | |
| 3202 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
| 3203 // Add new map blocks, fill them | |
| 3204 while (nonstatic_oop_map_count-- > 0) { | |
| 3205 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 3206 this_oop_map->set_length(*nonstatic_oop_length++); | |
| 3207 this_oop_map++; | |
| 3208 } | |
| 3209 } | |
| 3210 } | |
| 3211 | |
| 3212 | |
| 3213 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3214 klassOop super = k->super(); | |
| 3215 | |
| 3216 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3217 // in which case we don't have to register objects as finalizable | |
| 3218 if (!_has_empty_finalizer) { | |
| 3219 if (_has_finalizer || | |
| 3220 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3221 k->set_has_finalizer(); | |
| 3222 } | |
| 3223 } | |
| 3224 | |
| 3225 #ifdef ASSERT | |
| 3226 bool f = false; | |
| 3227 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3228 vmSymbols::void_method_signature()); | |
| 3229 if (m != NULL && !m->is_empty_method()) { | |
| 3230 f = true; | |
| 3231 } | |
| 3232 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3233 #endif | |
| 3234 | |
| 3235 // Check if this klass supports the java.lang.Cloneable interface | |
| 3236 if (SystemDictionary::cloneable_klass_loaded()) { | |
| 3237 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
| 3238 k->set_is_cloneable(); | |
| 3239 } | |
| 3240 } | |
| 3241 | |
| 3242 // Check if this klass has a vanilla default constructor | |
| 3243 if (super == NULL) { | |
| 3244 // java.lang.Object has empty default constructor | |
| 3245 k->set_has_vanilla_constructor(); | |
| 3246 } else { | |
| 3247 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3248 _has_vanilla_constructor) { | |
| 3249 k->set_has_vanilla_constructor(); | |
| 3250 } | |
| 3251 #ifdef ASSERT | |
| 3252 bool v = false; | |
| 3253 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3254 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3255 ), vmSymbols::void_method_signature()); | |
| 3256 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3257 v = true; | |
| 3258 } | |
| 3259 } | |
| 3260 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3261 #endif | |
| 3262 } | |
| 3263 | |
| 3264 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3265 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3266 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3267 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3268 || k->is_abstract() || k->is_interface() | |
| 3269 || (k->name() == vmSymbols::java_lang_Class() | |
| 3270 && k->class_loader() == NULL) | |
| 3271 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3272 // Forbid fast-path allocation. | |
| 3273 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3274 k->set_layout_helper(lh); | |
| 3275 } | |
| 3276 } | |
| 3277 | |
| 3278 | |
| 3279 // utility method for appending and array with check for duplicates | |
| 3280 | |
| 3281 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3282 // iterate over new interfaces | |
| 3283 for (int i = 0; i < ifs->length(); i++) { | |
| 3284 oop e = ifs->obj_at(i); | |
| 3285 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3286 // check for duplicates | |
| 3287 bool duplicate = false; | |
| 3288 for (int j = 0; j < index; j++) { | |
| 3289 if (result->obj_at(j) == e) { | |
| 3290 duplicate = true; | |
| 3291 break; | |
| 3292 } | |
| 3293 } | |
| 3294 // add new interface | |
| 3295 if (!duplicate) { | |
| 3296 result->obj_at_put(index++, e); | |
| 3297 } | |
| 3298 } | |
| 3299 } | |
| 3300 | |
| 3301 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3302 // Compute maximum size for transitive interfaces | |
| 3303 int max_transitive_size = 0; | |
| 3304 int super_size = 0; | |
| 3305 // Add superclass transitive interfaces size | |
| 3306 if (super.not_null()) { | |
| 3307 super_size = super->transitive_interfaces()->length(); | |
| 3308 max_transitive_size += super_size; | |
| 3309 } | |
| 3310 // Add local interfaces' super interfaces | |
| 3311 int local_size = local_ifs->length(); | |
| 3312 for (int i = 0; i < local_size; i++) { | |
| 3313 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3314 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3315 } | |
| 3316 // Finally add local interfaces | |
| 3317 max_transitive_size += local_size; | |
| 3318 // Construct array | |
| 3319 objArrayHandle result; | |
| 3320 if (max_transitive_size == 0) { | |
| 3321 // no interfaces, use canonicalized array | |
| 3322 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3323 } else if (max_transitive_size == super_size) { | |
| 3324 // no new local interfaces added, share superklass' transitive interface array | |
| 3325 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3326 } else if (max_transitive_size == local_size) { | |
| 3327 // only local interfaces added, share local interface array | |
| 3328 result = local_ifs; | |
| 3329 } else { | |
| 3330 objArrayHandle nullHandle; | |
| 3331 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3332 result = objArrayHandle(THREAD, new_objarray); | |
| 3333 int index = 0; | |
| 3334 // Copy down from superclass | |
| 3335 if (super.not_null()) { | |
| 3336 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3337 } | |
| 3338 // Copy down from local interfaces' superinterfaces | |
| 3339 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3340 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3341 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3342 } | |
| 3343 // Finally add local interfaces | |
| 3344 append_interfaces(result, index, local_ifs()); | |
| 3345 | |
| 3346 // Check if duplicates were removed | |
| 3347 if (index != max_transitive_size) { | |
| 3348 assert(index < max_transitive_size, "just checking"); | |
| 3349 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3350 for (int i = 0; i < index; i++) { | |
| 3351 oop e = result->obj_at(i); | |
| 3352 assert(e != NULL, "just checking"); | |
| 3353 new_result->obj_at_put(i, e); | |
| 3354 } | |
| 3355 result = objArrayHandle(THREAD, new_result); | |
| 3356 } | |
| 3357 } | |
| 3358 return result; | |
| 3359 } | |
| 3360 | |
| 3361 | |
| 3362 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3363 klassOop super = this_klass->super(); | |
| 3364 if ((super != NULL) && | |
| 3365 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3366 ResourceMark rm(THREAD); | |
| 3367 Exceptions::fthrow( | |
| 3368 THREAD_AND_LOCATION, | |
| 3369 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3370 "class %s cannot access its superclass %s", | |
| 3371 this_klass->external_name(), | |
| 3372 instanceKlass::cast(super)->external_name() | |
| 3373 ); | |
| 3374 return; | |
| 3375 } | |
| 3376 } | |
| 3377 | |
| 3378 | |
| 3379 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3380 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3381 int lng = local_interfaces->length(); | |
| 3382 for (int i = lng - 1; i >= 0; i--) { | |
| 3383 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3384 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3385 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3386 ResourceMark rm(THREAD); | |
| 3387 Exceptions::fthrow( | |
| 3388 THREAD_AND_LOCATION, | |
| 3389 vmSymbolHandles::java_lang_IllegalAccessError(), | |
| 3390 "class %s cannot access its superinterface %s", | |
| 3391 this_klass->external_name(), | |
| 3392 instanceKlass::cast(k)->external_name() | |
| 3393 ); | |
| 3394 return; | |
| 3395 } | |
| 3396 } | |
| 3397 } | |
| 3398 | |
| 3399 | |
| 3400 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3401 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3402 int num_methods = methods->length(); | |
| 3403 | |
| 3404 // go thru each method and check if it overrides a final method | |
| 3405 for (int index = 0; index < num_methods; index++) { | |
| 3406 methodOop m = (methodOop)methods->obj_at(index); | |
| 3407 | |
| 3408 // skip private, static and <init> methods | |
| 3409 if ((!m->is_private()) && | |
| 3410 (!m->is_static()) && | |
| 3411 (m->name() != vmSymbols::object_initializer_name())) { | |
| 3412 | |
| 3413 symbolOop name = m->name(); | |
| 3414 symbolOop signature = m->signature(); | |
| 3415 klassOop k = this_klass->super(); | |
| 3416 methodOop super_m = NULL; | |
| 3417 while (k != NULL) { | |
| 3418 // skip supers that don't have final methods. | |
| 3419 if (k->klass_part()->has_final_method()) { | |
| 3420 // lookup a matching method in the super class hierarchy | |
| 3421 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 3422 if (super_m == NULL) { | |
| 3423 break; // didn't find any match; get out | |
| 3424 } | |
| 3425 | |
| 3426 if (super_m->is_final() && | |
| 3427 // matching method in super is final | |
| 3428 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 3429 super_m->method_holder(), | |
| 3430 super_m->method_holder(), | |
| 3431 super_m->access_flags(), false)) | |
| 3432 // this class can access super final method and therefore override | |
| 3433 ) { | |
| 3434 ResourceMark rm(THREAD); | |
| 3435 Exceptions::fthrow( | |
| 3436 THREAD_AND_LOCATION, | |
| 3437 vmSymbolHandles::java_lang_VerifyError(), | |
| 3438 "class %s overrides final method %s.%s", | |
| 3439 this_klass->external_name(), | |
| 3440 name->as_C_string(), | |
| 3441 signature->as_C_string() | |
| 3442 ); | |
| 3443 return; | |
| 3444 } | |
| 3445 | |
| 3446 // continue to look from super_m's holder's super. | |
| 3447 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 3448 continue; | |
| 3449 } | |
| 3450 | |
| 3451 k = k->klass_part()->super(); | |
| 3452 } | |
| 3453 } | |
| 3454 } | |
| 3455 } | |
| 3456 | |
| 3457 | |
| 3458 // assumes that this_klass is an interface | |
| 3459 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 3460 assert(this_klass->is_interface(), "not an interface"); | |
| 3461 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 3462 int num_methods = methods->length(); | |
| 3463 | |
| 3464 for (int index = 0; index < num_methods; index++) { | |
| 3465 methodOop m = (methodOop)methods->obj_at(index); | |
| 3466 // if m is static and not the init method, throw a verify error | |
| 3467 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 3468 ResourceMark rm(THREAD); | |
| 3469 Exceptions::fthrow( | |
| 3470 THREAD_AND_LOCATION, | |
| 3471 vmSymbolHandles::java_lang_VerifyError(), | |
| 3472 "Illegal static method %s in interface %s", | |
| 3473 m->name()->as_C_string(), | |
| 3474 this_klass->external_name() | |
| 3475 ); | |
| 3476 return; | |
| 3477 } | |
| 3478 } | |
| 3479 } | |
| 3480 | |
| 3481 // utility methods for format checking | |
| 3482 | |
| 3483 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 3484 if (!_need_verify) { return; } | |
| 3485 | |
| 3486 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 3487 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3488 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3489 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 3490 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3491 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 3492 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3493 | |
| 3494 if ((is_abstract && is_final) || | |
| 3495 (is_interface && !is_abstract) || | |
| 3496 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 3497 (!is_interface && major_gte_15 && is_annotation)) { | |
| 3498 ResourceMark rm(THREAD); | |
| 3499 Exceptions::fthrow( | |
| 3500 THREAD_AND_LOCATION, | |
| 3501 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3502 "Illegal class modifiers in class %s: 0x%X", | |
| 3503 _class_name->as_C_string(), flags | |
| 3504 ); | |
| 3505 return; | |
| 3506 } | |
| 3507 } | |
| 3508 | |
| 3509 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 3510 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3511 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3512 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3513 | |
| 3514 return ((is_public && is_protected) || | |
| 3515 (is_public && is_private) || | |
| 3516 (is_protected && is_private)); | |
| 3517 } | |
| 3518 | |
| 3519 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
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|
3520 u2 max_version = JDK_Version::is_gte_jdk17x_version() ? |
|
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diff
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|
3521 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION; |
| 0 | 3522 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
176
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diff
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|
3523 (major <= max_version) && |
|
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diff
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|
3524 ((major != max_version) || |
| 0 | 3525 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 3526 } | |
| 3527 | |
| 3528 void ClassFileParser::verify_legal_field_modifiers( | |
| 3529 jint flags, bool is_interface, TRAPS) { | |
| 3530 if (!_need_verify) { return; } | |
| 3531 | |
| 3532 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3533 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 3534 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3535 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3536 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3537 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 3538 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 3539 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 3540 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3541 | |
| 3542 bool is_illegal = false; | |
| 3543 | |
| 3544 if (is_interface) { | |
| 3545 if (!is_public || !is_static || !is_final || is_private || | |
| 3546 is_protected || is_volatile || is_transient || | |
| 3547 (major_gte_15 && is_enum)) { | |
| 3548 is_illegal = true; | |
| 3549 } | |
| 3550 } else { // not interface | |
| 3551 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 3552 is_illegal = true; | |
| 3553 } | |
| 3554 } | |
| 3555 | |
| 3556 if (is_illegal) { | |
| 3557 ResourceMark rm(THREAD); | |
| 3558 Exceptions::fthrow( | |
| 3559 THREAD_AND_LOCATION, | |
| 3560 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3561 "Illegal field modifiers in class %s: 0x%X", | |
| 3562 _class_name->as_C_string(), flags); | |
| 3563 return; | |
| 3564 } | |
| 3565 } | |
| 3566 | |
| 3567 void ClassFileParser::verify_legal_method_modifiers( | |
| 3568 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
| 3569 if (!_need_verify) { return; } | |
| 3570 | |
| 3571 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 3572 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 3573 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 3574 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 3575 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 3576 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 3577 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 3578 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 3579 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 3580 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 3581 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 3582 | |
| 3583 bool is_illegal = false; | |
| 3584 | |
| 3585 if (is_interface) { | |
| 3586 if (!is_abstract || !is_public || is_static || is_final || | |
| 3587 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 3588 is_illegal = true; | |
| 3589 } | |
| 3590 } else { // not interface | |
| 3591 if (is_initializer) { | |
| 3592 if (is_static || is_final || is_synchronized || is_native || | |
| 3593 is_abstract || (major_gte_15 && is_bridge)) { | |
| 3594 is_illegal = true; | |
| 3595 } | |
| 3596 } else { // not initializer | |
| 3597 if (is_abstract) { | |
| 3598 if ((is_final || is_native || is_private || is_static || | |
| 3599 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 3600 is_illegal = true; | |
| 3601 } | |
| 3602 } | |
| 3603 if (has_illegal_visibility(flags)) { | |
| 3604 is_illegal = true; | |
| 3605 } | |
| 3606 } | |
| 3607 } | |
| 3608 | |
| 3609 if (is_illegal) { | |
| 3610 ResourceMark rm(THREAD); | |
| 3611 Exceptions::fthrow( | |
| 3612 THREAD_AND_LOCATION, | |
| 3613 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3614 "Method %s in class %s has illegal modifiers: 0x%X", | |
| 3615 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 3616 return; | |
| 3617 } | |
| 3618 } | |
| 3619 | |
| 3620 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 3621 assert(_need_verify, "only called when _need_verify is true"); | |
| 3622 int i = 0; | |
| 3623 int count = length >> 2; | |
| 3624 for (int k=0; k<count; k++) { | |
| 3625 unsigned char b0 = buffer[i]; | |
| 3626 unsigned char b1 = buffer[i+1]; | |
| 3627 unsigned char b2 = buffer[i+2]; | |
| 3628 unsigned char b3 = buffer[i+3]; | |
| 3629 // For an unsigned char v, | |
| 3630 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 3631 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 3632 unsigned char res = b0 | b0 - 1 | | |
| 3633 b1 | b1 - 1 | | |
| 3634 b2 | b2 - 1 | | |
| 3635 b3 | b3 - 1; | |
| 3636 if (res >= 128) break; | |
| 3637 i += 4; | |
| 3638 } | |
| 3639 for(; i < length; i++) { | |
| 3640 unsigned short c; | |
| 3641 // no embedded zeros | |
| 3642 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3643 if(buffer[i] < 128) { | |
| 3644 continue; | |
| 3645 } | |
| 3646 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 3647 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 3648 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 3649 i += 5; | |
| 3650 continue; | |
| 3651 } | |
| 3652 } | |
| 3653 switch (buffer[i] >> 4) { | |
| 3654 default: break; | |
| 3655 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 3656 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3657 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 3658 c = (buffer[i] & 0x1F) << 6; | |
| 3659 i++; | |
| 3660 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3661 c += buffer[i] & 0x3F; | |
| 3662 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 3663 // for classes with major > 47, c must a null or a character in its shortest form | |
| 3664 break; | |
| 3665 } | |
| 3666 } | |
| 3667 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3668 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 3669 c = (buffer[i] & 0xF) << 12; | |
| 3670 i += 2; | |
| 3671 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 3672 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 3673 if (_major_version <= 47 || c >= 0x800) { | |
| 3674 // for classes with major > 47, c must be in its shortest form | |
| 3675 break; | |
| 3676 } | |
| 3677 } | |
| 3678 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 3679 } // end of switch | |
| 3680 } // end of for | |
| 3681 } | |
| 3682 | |
| 3683 // Checks if name is a legal class name. | |
| 3684 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
| 3685 if (!_need_verify || _relax_verify) { return; } | |
| 3686 | |
| 3687 char buf[fixed_buffer_size]; | |
| 3688 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3689 unsigned int length = name->utf8_length(); | |
| 3690 bool legal = false; | |
| 3691 | |
| 3692 if (length > 0) { | |
| 3693 char* p; | |
| 3694 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 3695 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 3696 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3697 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3698 if (bytes[0] != '<') { | |
| 3699 p = skip_over_field_name(bytes, true, length); | |
| 3700 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3701 } | |
| 3702 } else { | |
| 3703 // 4900761: relax the constraints based on JSR202 spec | |
| 3704 // Class names may be drawn from the entire Unicode character set. | |
| 3705 // Identifiers between '/' must be unqualified names. | |
| 3706 // The utf8 string has been verified when parsing cpool entries. | |
| 3707 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 3708 } | |
| 3709 } | |
| 3710 if (!legal) { | |
| 3711 ResourceMark rm(THREAD); | |
| 3712 Exceptions::fthrow( | |
| 3713 THREAD_AND_LOCATION, | |
| 3714 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3715 "Illegal class name \"%s\" in class file %s", bytes, | |
| 3716 _class_name->as_C_string() | |
| 3717 ); | |
| 3718 return; | |
| 3719 } | |
| 3720 } | |
| 3721 | |
| 3722 // Checks if name is a legal field name. | |
| 3723 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
| 3724 if (!_need_verify || _relax_verify) { return; } | |
| 3725 | |
| 3726 char buf[fixed_buffer_size]; | |
| 3727 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3728 unsigned int length = name->utf8_length(); | |
| 3729 bool legal = false; | |
| 3730 | |
| 3731 if (length > 0) { | |
| 3732 if (_major_version < JAVA_1_5_VERSION) { | |
| 3733 if (bytes[0] != '<') { | |
| 3734 char* p = skip_over_field_name(bytes, false, length); | |
| 3735 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3736 } | |
| 3737 } else { | |
| 3738 // 4881221: relax the constraints based on JSR202 spec | |
| 3739 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 3740 } | |
| 3741 } | |
| 3742 | |
| 3743 if (!legal) { | |
| 3744 ResourceMark rm(THREAD); | |
| 3745 Exceptions::fthrow( | |
| 3746 THREAD_AND_LOCATION, | |
| 3747 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3748 "Illegal field name \"%s\" in class %s", bytes, | |
| 3749 _class_name->as_C_string() | |
| 3750 ); | |
| 3751 return; | |
| 3752 } | |
| 3753 } | |
| 3754 | |
| 3755 // Checks if name is a legal method name. | |
| 3756 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
| 3757 if (!_need_verify || _relax_verify) { return; } | |
| 3758 | |
| 3759 assert(!name.is_null(), "method name is null"); | |
| 3760 char buf[fixed_buffer_size]; | |
| 3761 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3762 unsigned int length = name->utf8_length(); | |
| 3763 bool legal = false; | |
| 3764 | |
| 3765 if (length > 0) { | |
| 3766 if (bytes[0] == '<') { | |
| 3767 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 3768 legal = true; | |
| 3769 } | |
| 3770 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 3771 char* p; | |
| 3772 p = skip_over_field_name(bytes, false, length); | |
| 3773 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 3774 } else { | |
| 3775 // 4881221: relax the constraints based on JSR202 spec | |
| 3776 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 3777 } | |
| 3778 } | |
| 3779 | |
| 3780 if (!legal) { | |
| 3781 ResourceMark rm(THREAD); | |
| 3782 Exceptions::fthrow( | |
| 3783 THREAD_AND_LOCATION, | |
| 3784 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3785 "Illegal method name \"%s\" in class %s", bytes, | |
| 3786 _class_name->as_C_string() | |
| 3787 ); | |
| 3788 return; | |
| 3789 } | |
| 3790 } | |
| 3791 | |
| 3792 | |
| 3793 // Checks if signature is a legal field signature. | |
| 3794 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 3795 if (!_need_verify) { return; } | |
| 3796 | |
| 3797 char buf[fixed_buffer_size]; | |
| 3798 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3799 unsigned int length = signature->utf8_length(); | |
| 3800 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 3801 | |
| 3802 if (p == NULL || (p - bytes) != (int)length) { | |
| 3803 ResourceMark rm(THREAD); | |
| 3804 Exceptions::fthrow( | |
| 3805 THREAD_AND_LOCATION, | |
| 3806 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3807 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
| 3808 name->as_C_string(), _class_name->as_C_string(), bytes | |
| 3809 ); | |
| 3810 return; | |
| 3811 } | |
| 3812 } | |
| 3813 | |
| 3814 // Checks if signature is a legal method signature. | |
| 3815 // Returns number of parameters | |
| 3816 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
| 3817 if (!_need_verify) { | |
| 3818 // make sure caller's args_size will be less than 0 even for non-static | |
| 3819 // method so it will be recomputed in compute_size_of_parameters(). | |
| 3820 return -2; | |
| 3821 } | |
| 3822 | |
| 3823 unsigned int args_size = 0; | |
| 3824 char buf[fixed_buffer_size]; | |
| 3825 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 3826 unsigned int length = signature->utf8_length(); | |
| 3827 char* nextp; | |
| 3828 | |
| 3829 // The first character must be a '(' | |
| 3830 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 3831 length--; | |
| 3832 // Skip over legal field signatures | |
| 3833 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 3834 while ((length > 0) && (nextp != NULL)) { | |
| 3835 args_size++; | |
| 3836 if (p[0] == 'J' || p[0] == 'D') { | |
| 3837 args_size++; | |
| 3838 } | |
| 3839 length -= nextp - p; | |
| 3840 p = nextp; | |
| 3841 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 3842 } | |
| 3843 // The first non-signature thing better be a ')' | |
| 3844 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 3845 length--; | |
| 3846 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 3847 // All internal methods must return void | |
| 3848 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 3849 return args_size; | |
| 3850 } | |
| 3851 } else { | |
| 3852 // Now we better just have a return value | |
| 3853 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 3854 if (nextp && ((int)length == (nextp - p))) { | |
| 3855 return args_size; | |
| 3856 } | |
| 3857 } | |
| 3858 } | |
| 3859 } | |
| 3860 // Report error | |
| 3861 ResourceMark rm(THREAD); | |
| 3862 Exceptions::fthrow( | |
| 3863 THREAD_AND_LOCATION, | |
| 3864 vmSymbolHandles::java_lang_ClassFormatError(), | |
| 3865 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
| 3866 name->as_C_string(), _class_name->as_C_string(), p | |
| 3867 ); | |
| 3868 return 0; | |
| 3869 } | |
| 3870 | |
| 3871 | |
| 3872 // Unqualified names may not contain the characters '.', ';', or '/'. | |
| 3873 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
| 3874 // Note that method names may not be <init> or <clinit> in this method. | |
| 3875 // Because these names have been checked as special cases before calling this method | |
| 3876 // in verify_legal_method_name. | |
| 3877 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
| 3878 jchar ch; | |
| 3879 | |
| 3880 for (char* p = name; p != name + length; ) { | |
| 3881 ch = *p; | |
| 3882 if (ch < 128) { | |
| 3883 p++; | |
| 3884 if (ch == '.' || ch == ';') { | |
| 3885 return false; // do not permit '.' or ';' | |
| 3886 } | |
| 3887 if (type != LegalClass && ch == '/') { | |
| 3888 return false; // do not permit '/' unless it's class name | |
| 3889 } | |
| 3890 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 3891 return false; // do not permit '<' or '>' in method names | |
| 3892 } | |
| 3893 } else { | |
| 3894 char* tmp_p = UTF8::next(p, &ch); | |
| 3895 p = tmp_p; | |
| 3896 } | |
| 3897 } | |
| 3898 return true; | |
| 3899 } | |
| 3900 | |
| 3901 | |
| 3902 // Take pointer to a string. Skip over the longest part of the string that could | |
| 3903 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 3904 // Return a pointer to just past the fieldname. | |
| 3905 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 3906 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 3907 // qualified path but found something that was badly-formed). | |
| 3908 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 3909 char* p; | |
| 3910 jchar ch; | |
| 3911 jboolean last_is_slash = false; | |
| 3912 jboolean not_first_ch = false; | |
| 3913 | |
| 3914 for (p = name; p != name + length; not_first_ch = true) { | |
| 3915 char* old_p = p; | |
| 3916 ch = *p; | |
| 3917 if (ch < 128) { | |
| 3918 p++; | |
| 3919 // quick check for ascii | |
| 3920 if ((ch >= 'a' && ch <= 'z') || | |
| 3921 (ch >= 'A' && ch <= 'Z') || | |
| 3922 (ch == '_' || ch == '$') || | |
| 3923 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 3924 last_is_slash = false; | |
| 3925 continue; | |
| 3926 } | |
| 3927 if (slash_ok && ch == '/') { | |
| 3928 if (last_is_slash) { | |
| 3929 return NULL; // Don't permit consecutive slashes | |
| 3930 } | |
| 3931 last_is_slash = true; | |
| 3932 continue; | |
| 3933 } | |
| 3934 } else { | |
| 3935 jint unicode_ch; | |
| 3936 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 3937 p = tmp_p; | |
| 3938 last_is_slash = false; | |
| 3939 // Check if ch is Java identifier start or is Java identifier part | |
| 3940 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 3941 EXCEPTION_MARK; | |
| 3942 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
| 3943 | |
| 3944 // return value | |
| 3945 JavaValue result(T_BOOLEAN); | |
| 3946 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 3947 JavaCallArguments args; | |
| 3948 args.push_int(unicode_ch); | |
| 3949 | |
| 3950 // public static boolean isJavaIdentifierStart(char ch); | |
| 3951 JavaCalls::call_static(&result, | |
| 3952 klass, | |
| 3953 vmSymbolHandles::isJavaIdentifierStart_name(), | |
| 3954 vmSymbolHandles::int_bool_signature(), | |
| 3955 &args, | |
| 3956 THREAD); | |
| 3957 | |
| 3958 if (HAS_PENDING_EXCEPTION) { | |
| 3959 CLEAR_PENDING_EXCEPTION; | |
| 3960 return 0; | |
| 3961 } | |
| 3962 if (result.get_jboolean()) { | |
| 3963 continue; | |
| 3964 } | |
| 3965 | |
| 3966 if (not_first_ch) { | |
| 3967 // public static boolean isJavaIdentifierPart(char ch); | |
| 3968 JavaCalls::call_static(&result, | |
| 3969 klass, | |
| 3970 vmSymbolHandles::isJavaIdentifierPart_name(), | |
| 3971 vmSymbolHandles::int_bool_signature(), | |
| 3972 &args, | |
| 3973 THREAD); | |
| 3974 | |
| 3975 if (HAS_PENDING_EXCEPTION) { | |
| 3976 CLEAR_PENDING_EXCEPTION; | |
| 3977 return 0; | |
| 3978 } | |
| 3979 | |
| 3980 if (result.get_jboolean()) { | |
| 3981 continue; | |
| 3982 } | |
| 3983 } | |
| 3984 } | |
| 3985 return (not_first_ch) ? old_p : NULL; | |
| 3986 } | |
| 3987 return (not_first_ch) ? p : NULL; | |
| 3988 } | |
| 3989 | |
| 3990 | |
| 3991 // Take pointer to a string. Skip over the longest part of the string that could | |
| 3992 // be taken as a field signature. Allow "void" if void_ok. | |
| 3993 // Return a pointer to just past the signature. | |
| 3994 // Return NULL if no legal signature is found. | |
| 3995 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 3996 bool void_ok, | |
| 3997 unsigned int length, | |
| 3998 TRAPS) { | |
| 3999 unsigned int array_dim = 0; | |
| 4000 while (length > 0) { | |
| 4001 switch (signature[0]) { | |
| 4002 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4003 case JVM_SIGNATURE_BOOLEAN: | |
| 4004 case JVM_SIGNATURE_BYTE: | |
| 4005 case JVM_SIGNATURE_CHAR: | |
| 4006 case JVM_SIGNATURE_SHORT: | |
| 4007 case JVM_SIGNATURE_INT: | |
| 4008 case JVM_SIGNATURE_FLOAT: | |
| 4009 case JVM_SIGNATURE_LONG: | |
| 4010 case JVM_SIGNATURE_DOUBLE: | |
| 4011 return signature + 1; | |
| 4012 case JVM_SIGNATURE_CLASS: { | |
| 4013 if (_major_version < JAVA_1_5_VERSION) { | |
| 4014 // Skip over the class name if one is there | |
| 4015 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4016 | |
| 4017 // The next character better be a semicolon | |
| 4018 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4019 return p + 1; | |
| 4020 } | |
| 4021 } else { | |
| 4022 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4023 length--; | |
| 4024 signature++; | |
| 4025 while (length > 0 && signature[0] != ';') { | |
| 4026 if (signature[0] == '.') { | |
| 4027 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4028 } | |
| 4029 length--; | |
| 4030 signature++; | |
| 4031 } | |
| 4032 if (signature[0] == ';') { return signature + 1; } | |
| 4033 } | |
| 4034 | |
| 4035 return NULL; | |
| 4036 } | |
| 4037 case JVM_SIGNATURE_ARRAY: | |
| 4038 array_dim++; | |
| 4039 if (array_dim > 255) { | |
| 4040 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4041 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4042 } | |
| 4043 // The rest of what's there better be a legal signature | |
| 4044 signature++; | |
| 4045 length--; | |
| 4046 void_ok = false; | |
| 4047 break; | |
| 4048 | |
| 4049 default: | |
| 4050 return NULL; | |
| 4051 } | |
| 4052 } | |
| 4053 return NULL; | |
| 4054 } |