1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 #include "precompiled.hpp" 25 #include "aot/aotLoader.hpp" 26 #include "classfile/classFileParser.hpp" 27 #include "classfile/classFileStream.hpp" 28 #include "classfile/classLoader.hpp" 29 #include "classfile/classLoaderData.inline.hpp" 30 #include "classfile/defaultMethods.hpp" 31 #include "classfile/dictionary.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/moduleEntry.hpp" 34 #include "classfile/symbolTable.hpp" 35 #include "classfile/systemDictionary.hpp" 36 #include "classfile/verificationType.hpp" 37 #include "classfile/verifier.hpp" 38 #include "classfile/vmSymbols.hpp" 39 #include "gc/shared/gcLocker.hpp" 40 #include "logging/log.hpp" 41 #include "memory/allocation.hpp" 42 #include "memory/metadataFactory.hpp" 43 #include "memory/oopFactory.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "memory/universe.inline.hpp" 46 #include "oops/annotations.hpp" 47 #include "oops/fieldStreams.hpp" 48 #include "oops/instanceKlass.hpp" 49 #include "oops/instanceMirrorKlass.hpp" 50 #include "oops/klass.inline.hpp" 51 #include "oops/klassVtable.hpp" 52 #include "oops/metadata.hpp" 53 #include "oops/method.hpp" 54 #include "oops/oop.inline.hpp" 55 #include "oops/symbol.hpp" 56 #include "oops/valueKlass.hpp" 57 #include "prims/jvm.h" 58 #include "prims/jvmtiExport.hpp" 59 #include "prims/jvmtiThreadState.hpp" 60 #include "runtime/javaCalls.hpp" 61 #include "runtime/perfData.hpp" 62 #include "runtime/reflection.hpp" 63 #include "runtime/signature.hpp" 64 #include "runtime/timer.hpp" 65 #include "services/classLoadingService.hpp" 66 #include "services/threadService.hpp" 67 #include "trace/traceMacros.hpp" 68 #include "utilities/exceptions.hpp" 69 #include "utilities/globalDefinitions.hpp" 70 #include "utilities/growableArray.hpp" 71 #include "utilities/macros.hpp" 72 #include "utilities/ostream.hpp" 73 #include "utilities/resourceHash.hpp" 74 #if INCLUDE_CDS 75 #include "classfile/systemDictionaryShared.hpp" 76 #endif 77 78 // We generally try to create the oops directly when parsing, rather than 79 // allocating temporary data structures and copying the bytes twice. A 80 // temporary area is only needed when parsing utf8 entries in the constant 81 // pool and when parsing line number tables. 82 83 // We add assert in debug mode when class format is not checked. 84 85 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE 86 #define JAVA_MIN_SUPPORTED_VERSION 45 87 #define JAVA_MAX_SUPPORTED_VERSION 53 88 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 1 89 90 // Used for two backward compatibility reasons: 91 // - to check for new additions to the class file format in JDK1.5 92 // - to check for bug fixes in the format checker in JDK1.5 93 #define JAVA_1_5_VERSION 49 94 95 // Used for backward compatibility reasons: 96 // - to check for javac bug fixes that happened after 1.5 97 // - also used as the max version when running in jdk6 98 #define JAVA_6_VERSION 50 99 100 // Used for backward compatibility reasons: 101 // - to disallow argument and require ACC_STATIC for <clinit> methods 102 #define JAVA_7_VERSION 51 103 104 // Extension method support. 105 #define JAVA_8_VERSION 52 106 107 #define JAVA_9_VERSION 53 108 109 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) { 110 assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION, 111 "Unexpected bad constant pool entry"); 112 if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant; 113 } 114 115 void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream, 116 ConstantPool* cp, 117 const int length, 118 TRAPS) { 119 assert(stream != NULL, "invariant"); 120 assert(cp != NULL, "invariant"); 121 122 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize 123 // this function (_current can be allocated in a register, with scalar 124 // replacement of aggregates). The _current pointer is copied back to 125 // stream() when this function returns. DON'T call another method within 126 // this method that uses stream(). 127 const ClassFileStream cfs1 = *stream; 128 const ClassFileStream* const cfs = &cfs1; 129 130 assert(cfs->allocated_on_stack(), "should be local"); 131 debug_only(const u1* const old_current = stream->current();) 132 133 // Used for batching symbol allocations. 134 const char* names[SymbolTable::symbol_alloc_batch_size]; 135 int lengths[SymbolTable::symbol_alloc_batch_size]; 136 int indices[SymbolTable::symbol_alloc_batch_size]; 137 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; 138 int names_count = 0; 139 140 // parsing Index 0 is unused 141 for (int index = 1; index < length; index++) { 142 // Each of the following case guarantees one more byte in the stream 143 // for the following tag or the access_flags following constant pool, 144 // so we don't need bounds-check for reading tag. 145 const u1 tag = cfs->get_u1_fast(); 146 switch (tag) { 147 case JVM_CONSTANT_Class : { 148 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags 149 const u2 name_index = cfs->get_u2_fast(); 150 cp->klass_index_at_put(index, name_index); 151 break; 152 } 153 case JVM_CONSTANT_Fieldref: { 154 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 155 const u2 class_index = cfs->get_u2_fast(); 156 const u2 name_and_type_index = cfs->get_u2_fast(); 157 cp->field_at_put(index, class_index, name_and_type_index); 158 break; 159 } 160 case JVM_CONSTANT_Methodref: { 161 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 162 const u2 class_index = cfs->get_u2_fast(); 163 const u2 name_and_type_index = cfs->get_u2_fast(); 164 cp->method_at_put(index, class_index, name_and_type_index); 165 break; 166 } 167 case JVM_CONSTANT_InterfaceMethodref: { 168 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags 169 const u2 class_index = cfs->get_u2_fast(); 170 const u2 name_and_type_index = cfs->get_u2_fast(); 171 cp->interface_method_at_put(index, class_index, name_and_type_index); 172 break; 173 } 174 case JVM_CONSTANT_String : { 175 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags 176 const u2 string_index = cfs->get_u2_fast(); 177 cp->string_index_at_put(index, string_index); 178 break; 179 } 180 case JVM_CONSTANT_MethodHandle : 181 case JVM_CONSTANT_MethodType: { 182 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 183 classfile_parse_error( 184 "Class file version does not support constant tag %u in class file %s", 185 tag, CHECK); 186 } 187 if (tag == JVM_CONSTANT_MethodHandle) { 188 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags 189 const u1 ref_kind = cfs->get_u1_fast(); 190 const u2 method_index = cfs->get_u2_fast(); 191 cp->method_handle_index_at_put(index, ref_kind, method_index); 192 } 193 else if (tag == JVM_CONSTANT_MethodType) { 194 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags 195 const u2 signature_index = cfs->get_u2_fast(); 196 cp->method_type_index_at_put(index, signature_index); 197 } 198 else { 199 ShouldNotReachHere(); 200 } 201 break; 202 } 203 case JVM_CONSTANT_InvokeDynamic : { 204 if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 205 classfile_parse_error( 206 "Class file version does not support constant tag %u in class file %s", 207 tag, CHECK); 208 } 209 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags 210 const u2 bootstrap_specifier_index = cfs->get_u2_fast(); 211 const u2 name_and_type_index = cfs->get_u2_fast(); 212 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) { 213 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later 214 } 215 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); 216 break; 217 } 218 case JVM_CONSTANT_Integer: { 219 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 220 const u4 bytes = cfs->get_u4_fast(); 221 cp->int_at_put(index, (jint)bytes); 222 break; 223 } 224 case JVM_CONSTANT_Float: { 225 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags 226 const u4 bytes = cfs->get_u4_fast(); 227 cp->float_at_put(index, *(jfloat*)&bytes); 228 break; 229 } 230 case JVM_CONSTANT_Long: { 231 // A mangled type might cause you to overrun allocated memory 232 guarantee_property(index + 1 < length, 233 "Invalid constant pool entry %u in class file %s", 234 index, 235 CHECK); 236 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 237 const u8 bytes = cfs->get_u8_fast(); 238 cp->long_at_put(index, bytes); 239 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 240 break; 241 } 242 case JVM_CONSTANT_Double: { 243 // A mangled type might cause you to overrun allocated memory 244 guarantee_property(index+1 < length, 245 "Invalid constant pool entry %u in class file %s", 246 index, 247 CHECK); 248 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags 249 const u8 bytes = cfs->get_u8_fast(); 250 cp->double_at_put(index, *(jdouble*)&bytes); 251 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 252 break; 253 } 254 case JVM_CONSTANT_NameAndType: { 255 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags 256 const u2 name_index = cfs->get_u2_fast(); 257 const u2 signature_index = cfs->get_u2_fast(); 258 cp->name_and_type_at_put(index, name_index, signature_index); 259 break; 260 } 261 case JVM_CONSTANT_Utf8 : { 262 cfs->guarantee_more(2, CHECK); // utf8_length 263 u2 utf8_length = cfs->get_u2_fast(); 264 const u1* utf8_buffer = cfs->get_u1_buffer(); 265 assert(utf8_buffer != NULL, "null utf8 buffer"); 266 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. 267 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags 268 cfs->skip_u1_fast(utf8_length); 269 270 // Before storing the symbol, make sure it's legal 271 if (_need_verify) { 272 verify_legal_utf8(utf8_buffer, utf8_length, CHECK); 273 } 274 275 if (has_cp_patch_at(index)) { 276 Handle patch = clear_cp_patch_at(index); 277 guarantee_property(java_lang_String::is_instance(patch()), 278 "Illegal utf8 patch at %d in class file %s", 279 index, 280 CHECK); 281 const char* const str = java_lang_String::as_utf8_string(patch()); 282 // (could use java_lang_String::as_symbol instead, but might as well batch them) 283 utf8_buffer = (const u1*) str; 284 utf8_length = (int) strlen(str); 285 } 286 287 unsigned int hash; 288 Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer, 289 utf8_length, 290 hash); 291 if (result == NULL) { 292 names[names_count] = (const char*)utf8_buffer; 293 lengths[names_count] = utf8_length; 294 indices[names_count] = index; 295 hashValues[names_count++] = hash; 296 if (names_count == SymbolTable::symbol_alloc_batch_size) { 297 SymbolTable::new_symbols(_loader_data, 298 cp, 299 names_count, 300 names, 301 lengths, 302 indices, 303 hashValues, 304 CHECK); 305 names_count = 0; 306 } 307 } else { 308 cp->symbol_at_put(index, result); 309 } 310 break; 311 } 312 case 19: 313 case 20: { 314 // Record that an error occurred in these two cases but keep parsing so 315 // that ACC_Module can be checked for in the access_flags. Need to 316 // throw NoClassDefFoundError in that case. 317 if (_major_version >= JAVA_9_VERSION) { 318 cfs->guarantee_more(3, CHECK); 319 cfs->get_u2_fast(); 320 set_class_bad_constant_seen(tag); 321 break; 322 } 323 } 324 default: { 325 classfile_parse_error("Unknown constant tag %u in class file %s", 326 tag, 327 CHECK); 328 break; 329 } 330 } // end of switch(tag) 331 } // end of for 332 333 // Allocate the remaining symbols 334 if (names_count > 0) { 335 SymbolTable::new_symbols(_loader_data, 336 cp, 337 names_count, 338 names, 339 lengths, 340 indices, 341 hashValues, 342 CHECK); 343 } 344 345 // Copy _current pointer of local copy back to stream. 346 assert(stream->current() == old_current, "non-exclusive use of stream"); 347 stream->set_current(cfs1.current()); 348 349 } 350 351 static inline bool valid_cp_range(int index, int length) { 352 return (index > 0 && index < length); 353 } 354 355 static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) { 356 assert(cp != NULL, "invariant"); 357 if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) { 358 return cp->symbol_at(index); 359 } 360 return NULL; 361 } 362 363 #ifdef ASSERT 364 PRAGMA_DIAG_PUSH 365 PRAGMA_FORMAT_NONLITERAL_IGNORED 366 void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const { 367 ResourceMark rm(THREAD); 368 fatal(msg, _class_name->as_C_string()); 369 } 370 371 void ClassFileParser::report_assert_property_failure(const char* msg, 372 int index, 373 TRAPS) const { 374 ResourceMark rm(THREAD); 375 fatal(msg, index, _class_name->as_C_string()); 376 } 377 PRAGMA_DIAG_POP 378 #endif 379 380 void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream, 381 ConstantPool* const cp, 382 const int length, 383 TRAPS) { 384 assert(cp != NULL, "invariant"); 385 assert(stream != NULL, "invariant"); 386 387 // parsing constant pool entries 388 parse_constant_pool_entries(stream, cp, length, CHECK); 389 if (class_bad_constant_seen() != 0) { 390 // a bad CP entry has been detected previously so stop parsing and just return. 391 return; 392 } 393 394 int index = 1; // declared outside of loops for portability 395 int num_klasses = 0; 396 397 // first verification pass - validate cross references 398 // and fixup class and string constants 399 for (index = 1; index < length; index++) { // Index 0 is unused 400 const jbyte tag = cp->tag_at(index).value(); 401 switch (tag) { 402 case JVM_CONSTANT_Class: { 403 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 404 break; 405 } 406 case JVM_CONSTANT_Fieldref: 407 // fall through 408 case JVM_CONSTANT_Methodref: 409 // fall through 410 case JVM_CONSTANT_InterfaceMethodref: { 411 if (!_need_verify) break; 412 const int klass_ref_index = cp->klass_ref_index_at(index); 413 const int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); 414 check_property(valid_klass_reference_at(klass_ref_index), 415 "Invalid constant pool index %u in class file %s", 416 klass_ref_index, CHECK); 417 check_property(valid_cp_range(name_and_type_ref_index, length) && 418 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 419 "Invalid constant pool index %u in class file %s", 420 name_and_type_ref_index, CHECK); 421 break; 422 } 423 case JVM_CONSTANT_String: { 424 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present 425 break; 426 } 427 case JVM_CONSTANT_Integer: 428 break; 429 case JVM_CONSTANT_Float: 430 break; 431 case JVM_CONSTANT_Long: 432 case JVM_CONSTANT_Double: { 433 index++; 434 check_property( 435 (index < length && cp->tag_at(index).is_invalid()), 436 "Improper constant pool long/double index %u in class file %s", 437 index, CHECK); 438 break; 439 } 440 case JVM_CONSTANT_NameAndType: { 441 if (!_need_verify) break; 442 const int name_ref_index = cp->name_ref_index_at(index); 443 const int signature_ref_index = cp->signature_ref_index_at(index); 444 check_property(valid_symbol_at(name_ref_index), 445 "Invalid constant pool index %u in class file %s", 446 name_ref_index, CHECK); 447 check_property(valid_symbol_at(signature_ref_index), 448 "Invalid constant pool index %u in class file %s", 449 signature_ref_index, CHECK); 450 break; 451 } 452 case JVM_CONSTANT_Utf8: 453 break; 454 case JVM_CONSTANT_UnresolvedClass: // fall-through 455 case JVM_CONSTANT_UnresolvedClassInError: { 456 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present 457 break; 458 } 459 case JVM_CONSTANT_ClassIndex: { 460 const int class_index = cp->klass_index_at(index); 461 check_property(valid_symbol_at(class_index), 462 "Invalid constant pool index %u in class file %s", 463 class_index, CHECK); 464 cp->unresolved_klass_at_put(index, class_index, num_klasses++); 465 break; 466 } 467 case JVM_CONSTANT_StringIndex: { 468 const int string_index = cp->string_index_at(index); 469 check_property(valid_symbol_at(string_index), 470 "Invalid constant pool index %u in class file %s", 471 string_index, CHECK); 472 Symbol* const sym = cp->symbol_at(string_index); 473 cp->unresolved_string_at_put(index, sym); 474 break; 475 } 476 case JVM_CONSTANT_MethodHandle: { 477 const int ref_index = cp->method_handle_index_at(index); 478 check_property(valid_cp_range(ref_index, length), 479 "Invalid constant pool index %u in class file %s", 480 ref_index, CHECK); 481 const constantTag tag = cp->tag_at(ref_index); 482 const int ref_kind = cp->method_handle_ref_kind_at(index); 483 484 switch (ref_kind) { 485 case JVM_REF_getField: 486 case JVM_REF_getStatic: 487 case JVM_REF_putField: 488 case JVM_REF_putStatic: { 489 check_property( 490 tag.is_field(), 491 "Invalid constant pool index %u in class file %s (not a field)", 492 ref_index, CHECK); 493 break; 494 } 495 case JVM_REF_invokeVirtual: 496 case JVM_REF_newInvokeSpecial: { 497 check_property( 498 tag.is_method(), 499 "Invalid constant pool index %u in class file %s (not a method)", 500 ref_index, CHECK); 501 break; 502 } 503 case JVM_REF_invokeStatic: 504 case JVM_REF_invokeSpecial: { 505 check_property( 506 tag.is_method() || 507 ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), 508 "Invalid constant pool index %u in class file %s (not a method)", 509 ref_index, CHECK); 510 break; 511 } 512 case JVM_REF_invokeInterface: { 513 check_property( 514 tag.is_interface_method(), 515 "Invalid constant pool index %u in class file %s (not an interface method)", 516 ref_index, CHECK); 517 break; 518 } 519 default: { 520 classfile_parse_error( 521 "Bad method handle kind at constant pool index %u in class file %s", 522 index, CHECK); 523 } 524 } // switch(refkind) 525 // Keep the ref_index unchanged. It will be indirected at link-time. 526 break; 527 } // case MethodHandle 528 case JVM_CONSTANT_MethodType: { 529 const int ref_index = cp->method_type_index_at(index); 530 check_property(valid_symbol_at(ref_index), 531 "Invalid constant pool index %u in class file %s", 532 ref_index, CHECK); 533 break; 534 } 535 case JVM_CONSTANT_InvokeDynamic: { 536 const int name_and_type_ref_index = 537 cp->invoke_dynamic_name_and_type_ref_index_at(index); 538 539 check_property(valid_cp_range(name_and_type_ref_index, length) && 540 cp->tag_at(name_and_type_ref_index).is_name_and_type(), 541 "Invalid constant pool index %u in class file %s", 542 name_and_type_ref_index, CHECK); 543 // bootstrap specifier index must be checked later, 544 // when BootstrapMethods attr is available 545 break; 546 } 547 default: { 548 fatal("bad constant pool tag value %u", cp->tag_at(index).value()); 549 ShouldNotReachHere(); 550 break; 551 } 552 } // switch(tag) 553 } // end of for 554 555 _first_patched_klass_resolved_index = num_klasses; 556 cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK); 557 558 if (_cp_patches != NULL) { 559 // need to treat this_class specially... 560 561 // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*" 562 // for now. These will be replaced with actual names of the patched classes in patch_class(). 563 Symbol* s = vmSymbols::star_name(); 564 for (int n=_orig_cp_size; n<cp->length(); n++) { 565 cp->symbol_at_put(n, s); 566 } 567 568 int this_class_index; 569 { 570 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 571 const u1* const mark = stream->current(); 572 stream->skip_u2_fast(1); // skip flags 573 this_class_index = stream->get_u2_fast(); 574 stream->set_current(mark); // revert to mark 575 } 576 577 for (index = 1; index < length; index++) { // Index 0 is unused 578 if (has_cp_patch_at(index)) { 579 guarantee_property(index != this_class_index, 580 "Illegal constant pool patch to self at %d in class file %s", 581 index, CHECK); 582 patch_constant_pool(cp, index, cp_patch_at(index), CHECK); 583 } 584 } 585 } 586 587 if (!_need_verify) { 588 return; 589 } 590 591 // second verification pass - checks the strings are of the right format. 592 // but not yet to the other entries 593 for (index = 1; index < length; index++) { 594 const jbyte tag = cp->tag_at(index).value(); 595 switch (tag) { 596 case JVM_CONSTANT_UnresolvedClass: { 597 const Symbol* const class_name = cp->klass_name_at(index); 598 // check the name, even if _cp_patches will overwrite it 599 verify_legal_class_name(class_name, CHECK); 600 break; 601 } 602 case JVM_CONSTANT_NameAndType: { 603 if (_need_verify) { 604 const int sig_index = cp->signature_ref_index_at(index); 605 const int name_index = cp->name_ref_index_at(index); 606 const Symbol* const name = cp->symbol_at(name_index); 607 const Symbol* const sig = cp->symbol_at(sig_index); 608 guarantee_property(sig->utf8_length() != 0, 609 "Illegal zero length constant pool entry at %d in class %s", 610 sig_index, CHECK); 611 guarantee_property(name->utf8_length() != 0, 612 "Illegal zero length constant pool entry at %d in class %s", 613 name_index, CHECK); 614 615 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { 616 // Format check method name and signature 617 verify_legal_method_name(name, CHECK); 618 verify_legal_method_signature(name, sig, CHECK); 619 } else { 620 // Format check field name and signature 621 verify_legal_field_name(name, CHECK); 622 verify_legal_field_signature(name, sig, CHECK); 623 } 624 } 625 break; 626 } 627 case JVM_CONSTANT_InvokeDynamic: 628 case JVM_CONSTANT_Fieldref: 629 case JVM_CONSTANT_Methodref: 630 case JVM_CONSTANT_InterfaceMethodref: { 631 const int name_and_type_ref_index = 632 cp->name_and_type_ref_index_at(index); 633 // already verified to be utf8 634 const int name_ref_index = 635 cp->name_ref_index_at(name_and_type_ref_index); 636 // already verified to be utf8 637 const int signature_ref_index = 638 cp->signature_ref_index_at(name_and_type_ref_index); 639 const Symbol* const name = cp->symbol_at(name_ref_index); 640 const Symbol* const signature = cp->symbol_at(signature_ref_index); 641 if (tag == JVM_CONSTANT_Fieldref) { 642 if (_need_verify) { 643 // Field name and signature are verified above, when iterating NameAndType_info. 644 // Need only to be sure signature is non-zero length and the right type. 645 if (signature->utf8_length() == 0 || 646 signature->byte_at(0) == JVM_SIGNATURE_FUNC) { 647 throwIllegalSignature("Field", name, signature, CHECK); 648 } 649 } 650 } else { 651 if (_need_verify) { 652 // Method name and signature are verified above, when iterating NameAndType_info. 653 // Need only to be sure signature is non-zero length and the right type. 654 if (signature->utf8_length() == 0 || 655 signature->byte_at(0) != JVM_SIGNATURE_FUNC) { 656 throwIllegalSignature("Method", name, signature, CHECK); 657 } 658 } 659 // 4509014: If a class method name begins with '<', it must be "<init>" 660 const unsigned int name_len = name->utf8_length(); 661 if (tag == JVM_CONSTANT_Methodref && 662 name_len != 0 && 663 name->byte_at(0) == '<' && 664 name != vmSymbols::object_initializer_name()) { 665 classfile_parse_error( 666 "Bad method name at constant pool index %u in class file %s", 667 name_ref_index, CHECK); 668 } 669 } 670 break; 671 } 672 case JVM_CONSTANT_MethodHandle: { 673 const int ref_index = cp->method_handle_index_at(index); 674 const int ref_kind = cp->method_handle_ref_kind_at(index); 675 switch (ref_kind) { 676 case JVM_REF_invokeVirtual: 677 case JVM_REF_invokeStatic: 678 case JVM_REF_invokeSpecial: 679 case JVM_REF_newInvokeSpecial: { 680 const int name_and_type_ref_index = 681 cp->name_and_type_ref_index_at(ref_index); 682 const int name_ref_index = 683 cp->name_ref_index_at(name_and_type_ref_index); 684 const Symbol* const name = cp->symbol_at(name_ref_index); 685 if (ref_kind == JVM_REF_newInvokeSpecial) { 686 if (name != vmSymbols::object_initializer_name()) { 687 classfile_parse_error( 688 "Bad constructor name at constant pool index %u in class file %s", 689 name_ref_index, CHECK); 690 } 691 } else { 692 if (name == vmSymbols::object_initializer_name()) { 693 classfile_parse_error( 694 "Bad method name at constant pool index %u in class file %s", 695 name_ref_index, CHECK); 696 } 697 } 698 break; 699 } 700 // Other ref_kinds are already fully checked in previous pass. 701 } // switch(ref_kind) 702 break; 703 } 704 case JVM_CONSTANT_MethodType: { 705 const Symbol* const no_name = vmSymbols::type_name(); // place holder 706 const Symbol* const signature = cp->method_type_signature_at(index); 707 verify_legal_method_signature(no_name, signature, CHECK); 708 break; 709 } 710 case JVM_CONSTANT_Utf8: { 711 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); 712 } 713 } // switch(tag) 714 } // end of for 715 } 716 717 void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) { 718 int name_index = _orig_cp_size + _num_patched_klasses; 719 int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses; 720 721 cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name); 722 _num_patched_klasses ++; 723 } 724 725 void ClassFileParser::patch_constant_pool(ConstantPool* cp, 726 int index, 727 Handle patch, 728 TRAPS) { 729 assert(cp != NULL, "invariant"); 730 731 BasicType patch_type = T_VOID; 732 733 switch (cp->tag_at(index).value()) { 734 735 case JVM_CONSTANT_UnresolvedClass: { 736 // Patching a class means pre-resolving it. 737 // The name in the constant pool is ignored. 738 if (java_lang_Class::is_instance(patch())) { 739 guarantee_property(!java_lang_Class::is_primitive(patch()), 740 "Illegal class patch at %d in class file %s", 741 index, CHECK); 742 Klass* k = java_lang_Class::as_Klass(patch()); 743 patch_class(cp, index, k, k->name()); 744 } else { 745 guarantee_property(java_lang_String::is_instance(patch()), 746 "Illegal class patch at %d in class file %s", 747 index, CHECK); 748 Symbol* const name = java_lang_String::as_symbol(patch(), CHECK); 749 patch_class(cp, index, NULL, name); 750 } 751 break; 752 } 753 754 case JVM_CONSTANT_String: { 755 // skip this patch and don't clear it. Needs the oop array for resolved 756 // references to be created first. 757 return; 758 } 759 case JVM_CONSTANT_Integer: patch_type = T_INT; goto patch_prim; 760 case JVM_CONSTANT_Float: patch_type = T_FLOAT; goto patch_prim; 761 case JVM_CONSTANT_Long: patch_type = T_LONG; goto patch_prim; 762 case JVM_CONSTANT_Double: patch_type = T_DOUBLE; goto patch_prim; 763 patch_prim: 764 { 765 jvalue value; 766 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); 767 guarantee_property(value_type == patch_type, 768 "Illegal primitive patch at %d in class file %s", 769 index, CHECK); 770 switch (value_type) { 771 case T_INT: cp->int_at_put(index, value.i); break; 772 case T_FLOAT: cp->float_at_put(index, value.f); break; 773 case T_LONG: cp->long_at_put(index, value.j); break; 774 case T_DOUBLE: cp->double_at_put(index, value.d); break; 775 default: assert(false, ""); 776 } 777 } // end patch_prim label 778 break; 779 780 default: { 781 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. 782 guarantee_property(!has_cp_patch_at(index), 783 "Illegal unexpected patch at %d in class file %s", 784 index, CHECK); 785 return; 786 } 787 } // end of switch(tag) 788 789 // On fall-through, mark the patch as used. 790 clear_cp_patch_at(index); 791 } 792 class NameSigHash: public ResourceObj { 793 public: 794 const Symbol* _name; // name 795 const Symbol* _sig; // signature 796 NameSigHash* _next; // Next entry in hash table 797 }; 798 799 static const int HASH_ROW_SIZE = 256; 800 801 static unsigned int hash(const Symbol* name, const Symbol* sig) { 802 unsigned int raw_hash = 0; 803 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); 804 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; 805 806 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; 807 } 808 809 810 static void initialize_hashtable(NameSigHash** table) { 811 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); 812 } 813 // Return false if the name/sig combination is found in table. 814 // Return true if no duplicate is found. And name/sig is added as a new entry in table. 815 // The old format checker uses heap sort to find duplicates. 816 // NOTE: caller should guarantee that GC doesn't happen during the life cycle 817 // of table since we don't expect Symbol*'s to move. 818 static bool put_after_lookup(const Symbol* name, const Symbol* sig, NameSigHash** table) { 819 assert(name != NULL, "name in constant pool is NULL"); 820 821 // First lookup for duplicates 822 int index = hash(name, sig); 823 NameSigHash* entry = table[index]; 824 while (entry != NULL) { 825 if (entry->_name == name && entry->_sig == sig) { 826 return false; 827 } 828 entry = entry->_next; 829 } 830 831 // No duplicate is found, allocate a new entry and fill it. 832 entry = new NameSigHash(); 833 entry->_name = name; 834 entry->_sig = sig; 835 836 // Insert into hash table 837 entry->_next = table[index]; 838 table[index] = entry; 839 840 return true; 841 } 842 843 // Side-effects: populates the _local_interfaces field 844 void ClassFileParser::parse_interfaces(const ClassFileStream* const stream, 845 const int itfs_len, 846 ConstantPool* const cp, 847 bool* const has_nonstatic_concrete_methods, 848 TRAPS) { 849 assert(stream != NULL, "invariant"); 850 assert(cp != NULL, "invariant"); 851 assert(has_nonstatic_concrete_methods != NULL, "invariant"); 852 853 if (itfs_len == 0) { 854 _local_interfaces = Universe::the_empty_klass_array(); 855 } else { 856 assert(itfs_len > 0, "only called for len>0"); 857 _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK); 858 859 int index; 860 for (index = 0; index < itfs_len; index++) { 861 const u2 interface_index = stream->get_u2(CHECK); 862 Klass* interf; 863 check_property( 864 valid_klass_reference_at(interface_index), 865 "Interface name has bad constant pool index %u in class file %s", 866 interface_index, CHECK); 867 if (cp->tag_at(interface_index).is_klass()) { 868 interf = cp->resolved_klass_at(interface_index); 869 } else { 870 Symbol* const unresolved_klass = cp->klass_name_at(interface_index); 871 872 // Don't need to check legal name because it's checked when parsing constant pool. 873 // But need to make sure it's not an array type. 874 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, 875 "Bad interface name in class file %s", CHECK); 876 877 // Call resolve_super so classcircularity is checked 878 interf = SystemDictionary::resolve_super_or_fail( 879 _class_name, 880 unresolved_klass, 881 Handle(THREAD, _loader_data->class_loader()), 882 _protection_domain, 883 false, 884 CHECK); 885 } 886 887 if (!interf->is_interface()) { 888 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), 889 "Implementing class"); 890 } 891 892 if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) { 893 *has_nonstatic_concrete_methods = true; 894 } 895 _local_interfaces->at_put(index, interf); 896 } 897 898 if (!_need_verify || itfs_len <= 1) { 899 return; 900 } 901 902 // Check if there's any duplicates in interfaces 903 ResourceMark rm(THREAD); 904 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 905 NameSigHash*, 906 HASH_ROW_SIZE); 907 initialize_hashtable(interface_names); 908 bool dup = false; 909 const Symbol* name = NULL; 910 { 911 debug_only(NoSafepointVerifier nsv;) 912 for (index = 0; index < itfs_len; index++) { 913 const Klass* const k = _local_interfaces->at(index); 914 name = InstanceKlass::cast(k)->name(); 915 // If no duplicates, add (name, NULL) in hashtable interface_names. 916 if (!put_after_lookup(name, NULL, interface_names)) { 917 dup = true; 918 break; 919 } 920 } 921 } 922 if (dup) { 923 classfile_parse_error("Duplicate interface name \"%s\" in class file %s", 924 name->as_C_string(), CHECK); 925 } 926 } 927 } 928 929 void ClassFileParser::verify_constantvalue(const ConstantPool* const cp, 930 int constantvalue_index, 931 int signature_index, 932 TRAPS) const { 933 // Make sure the constant pool entry is of a type appropriate to this field 934 guarantee_property( 935 (constantvalue_index > 0 && 936 constantvalue_index < cp->length()), 937 "Bad initial value index %u in ConstantValue attribute in class file %s", 938 constantvalue_index, CHECK); 939 940 const constantTag value_type = cp->tag_at(constantvalue_index); 941 switch(cp->basic_type_for_signature_at(signature_index)) { 942 case T_LONG: { 943 guarantee_property(value_type.is_long(), 944 "Inconsistent constant value type in class file %s", 945 CHECK); 946 break; 947 } 948 case T_FLOAT: { 949 guarantee_property(value_type.is_float(), 950 "Inconsistent constant value type in class file %s", 951 CHECK); 952 break; 953 } 954 case T_DOUBLE: { 955 guarantee_property(value_type.is_double(), 956 "Inconsistent constant value type in class file %s", 957 CHECK); 958 break; 959 } 960 case T_BYTE: 961 case T_CHAR: 962 case T_SHORT: 963 case T_BOOLEAN: 964 case T_INT: { 965 guarantee_property(value_type.is_int(), 966 "Inconsistent constant value type in class file %s", 967 CHECK); 968 break; 969 } 970 case T_OBJECT: { 971 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") 972 && value_type.is_string()), 973 "Bad string initial value in class file %s", 974 CHECK); 975 break; 976 } 977 default: { 978 classfile_parse_error("Unable to set initial value %u in class file %s", 979 constantvalue_index, 980 CHECK); 981 } 982 } 983 } 984 985 class AnnotationCollector : public ResourceObj{ 986 public: 987 enum Location { _in_field, _in_method, _in_class }; 988 enum ID { 989 _unknown = 0, 990 _method_CallerSensitive, 991 _method_ForceInline, 992 _method_DontInline, 993 _method_InjectedProfile, 994 _method_LambdaForm_Compiled, 995 _method_LambdaForm_Hidden, 996 _method_HotSpotIntrinsicCandidate, 997 _jdk_internal_vm_annotation_Contended, 998 _field_Stable, 999 _jdk_internal_vm_annotation_ReservedStackAccess, 1000 _jvm_internal_value_DeriveValueType, 1001 _annotation_LIMIT 1002 }; 1003 const Location _location; 1004 int _annotations_present; 1005 u2 _contended_group; 1006 1007 AnnotationCollector(Location location) 1008 : _location(location), _annotations_present(0) 1009 { 1010 assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, ""); 1011 } 1012 // If this annotation name has an ID, report it (or _none). 1013 ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name); 1014 // Set the annotation name: 1015 void set_annotation(ID id) { 1016 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 1017 _annotations_present |= nth_bit((int)id); 1018 } 1019 1020 void remove_annotation(ID id) { 1021 assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob"); 1022 _annotations_present &= ~nth_bit((int)id); 1023 } 1024 1025 // Report if the annotation is present. 1026 bool has_any_annotations() const { return _annotations_present != 0; } 1027 bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; } 1028 1029 void set_contended_group(u2 group) { _contended_group = group; } 1030 u2 contended_group() const { return _contended_group; } 1031 1032 bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); } 1033 1034 void set_stable(bool stable) { set_annotation(_field_Stable); } 1035 bool is_stable() const { return has_annotation(_field_Stable); } 1036 1037 bool is_derive_value_type() const { return has_annotation(_jvm_internal_value_DeriveValueType); } 1038 }; 1039 1040 // This class also doubles as a holder for metadata cleanup. 1041 class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector { 1042 private: 1043 ClassLoaderData* _loader_data; 1044 AnnotationArray* _field_annotations; 1045 AnnotationArray* _field_type_annotations; 1046 public: 1047 FieldAnnotationCollector(ClassLoaderData* loader_data) : 1048 AnnotationCollector(_in_field), 1049 _loader_data(loader_data), 1050 _field_annotations(NULL), 1051 _field_type_annotations(NULL) {} 1052 ~FieldAnnotationCollector(); 1053 void apply_to(FieldInfo* f); 1054 AnnotationArray* field_annotations() { return _field_annotations; } 1055 AnnotationArray* field_type_annotations() { return _field_type_annotations; } 1056 1057 void set_field_annotations(AnnotationArray* a) { _field_annotations = a; } 1058 void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; } 1059 }; 1060 1061 class MethodAnnotationCollector : public AnnotationCollector{ 1062 public: 1063 MethodAnnotationCollector() : AnnotationCollector(_in_method) { } 1064 void apply_to(methodHandle m); 1065 }; 1066 1067 class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{ 1068 public: 1069 ClassAnnotationCollector() : AnnotationCollector(_in_class) { } 1070 void apply_to(InstanceKlass* ik); 1071 }; 1072 1073 1074 static int skip_annotation_value(const u1*, int, int); // fwd decl 1075 1076 // Safely increment index by val if does not pass limit 1077 #define SAFE_ADD(index, limit, val) \ 1078 if (index >= limit - val) return limit; \ 1079 index += val; 1080 1081 // Skip an annotation. Return >=limit if there is any problem. 1082 static int skip_annotation(const u1* buffer, int limit, int index) { 1083 assert(buffer != NULL, "invariant"); 1084 // annotation := atype:u2 do(nmem:u2) {member:u2 value} 1085 // value := switch (tag:u1) { ... } 1086 SAFE_ADD(index, limit, 4); // skip atype and read nmem 1087 int nmem = Bytes::get_Java_u2((address)buffer + index - 2); 1088 while (--nmem >= 0 && index < limit) { 1089 SAFE_ADD(index, limit, 2); // skip member 1090 index = skip_annotation_value(buffer, limit, index); 1091 } 1092 return index; 1093 } 1094 1095 // Skip an annotation value. Return >=limit if there is any problem. 1096 static int skip_annotation_value(const u1* buffer, int limit, int index) { 1097 assert(buffer != NULL, "invariant"); 1098 1099 // value := switch (tag:u1) { 1100 // case B, C, I, S, Z, D, F, J, c: con:u2; 1101 // case e: e_class:u2 e_name:u2; 1102 // case s: s_con:u2; 1103 // case [: do(nval:u2) {value}; 1104 // case @: annotation; 1105 // case s: s_con:u2; 1106 // } 1107 SAFE_ADD(index, limit, 1); // read tag 1108 const u1 tag = buffer[index - 1]; 1109 switch (tag) { 1110 case 'B': 1111 case 'C': 1112 case 'I': 1113 case 'S': 1114 case 'Z': 1115 case 'D': 1116 case 'F': 1117 case 'J': 1118 case 'c': 1119 case 's': 1120 SAFE_ADD(index, limit, 2); // skip con or s_con 1121 break; 1122 case 'e': 1123 SAFE_ADD(index, limit, 4); // skip e_class, e_name 1124 break; 1125 case '[': 1126 { 1127 SAFE_ADD(index, limit, 2); // read nval 1128 int nval = Bytes::get_Java_u2((address)buffer + index - 2); 1129 while (--nval >= 0 && index < limit) { 1130 index = skip_annotation_value(buffer, limit, index); 1131 } 1132 } 1133 break; 1134 case '@': 1135 index = skip_annotation(buffer, limit, index); 1136 break; 1137 default: 1138 return limit; // bad tag byte 1139 } 1140 return index; 1141 } 1142 1143 // Sift through annotations, looking for those significant to the VM: 1144 static void parse_annotations(const ConstantPool* const cp, 1145 const u1* buffer, int limit, 1146 AnnotationCollector* coll, 1147 ClassLoaderData* loader_data, 1148 TRAPS) { 1149 1150 assert(cp != NULL, "invariant"); 1151 assert(buffer != NULL, "invariant"); 1152 assert(coll != NULL, "invariant"); 1153 assert(loader_data != NULL, "invariant"); 1154 1155 // annotations := do(nann:u2) {annotation} 1156 int index = 2; // read nann 1157 if (index >= limit) return; 1158 int nann = Bytes::get_Java_u2((address)buffer + index - 2); 1159 enum { // initial annotation layout 1160 atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' 1161 count_off = 2, // u2 such as 1 (one value) 1162 member_off = 4, // utf8 such as 'value' 1163 tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) 1164 e_tag_val = 'e', 1165 e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' 1166 e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' 1167 e_size = 11, // end of 'e' annotation 1168 c_tag_val = 'c', // payload is type 1169 c_con_off = 7, // utf8 payload, such as 'I' 1170 c_size = 9, // end of 'c' annotation 1171 s_tag_val = 's', // payload is String 1172 s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' 1173 s_size = 9, 1174 min_size = 6 // smallest possible size (zero members) 1175 }; 1176 // Cannot add min_size to index in case of overflow MAX_INT 1177 while ((--nann) >= 0 && (index - 2 <= limit - min_size)) { 1178 int index0 = index; 1179 index = skip_annotation(buffer, limit, index); 1180 const u1* const abase = buffer + index0; 1181 const int atype = Bytes::get_Java_u2((address)abase + atype_off); 1182 const int count = Bytes::get_Java_u2((address)abase + count_off); 1183 const Symbol* const aname = check_symbol_at(cp, atype); 1184 if (aname == NULL) break; // invalid annotation name 1185 const Symbol* member = NULL; 1186 if (count >= 1) { 1187 const int member_index = Bytes::get_Java_u2((address)abase + member_off); 1188 member = check_symbol_at(cp, member_index); 1189 if (member == NULL) break; // invalid member name 1190 } 1191 1192 // Here is where parsing particular annotations will take place. 1193 AnnotationCollector::ID id = coll->annotation_index(loader_data, aname); 1194 if (AnnotationCollector::_unknown == id) continue; 1195 coll->set_annotation(id); 1196 1197 if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) { 1198 // @Contended can optionally specify the contention group. 1199 // 1200 // Contended group defines the equivalence class over the fields: 1201 // the fields within the same contended group are not treated distinct. 1202 // The only exception is default group, which does not incur the 1203 // equivalence. Naturally, contention group for classes is meaningless. 1204 // 1205 // While the contention group is specified as String, annotation 1206 // values are already interned, and we might as well use the constant 1207 // pool index as the group tag. 1208 // 1209 u2 group_index = 0; // default contended group 1210 if (count == 1 1211 && s_size == (index - index0) // match size 1212 && s_tag_val == *(abase + tag_off) 1213 && member == vmSymbols::value_name()) { 1214 group_index = Bytes::get_Java_u2((address)abase + s_con_off); 1215 if (cp->symbol_at(group_index)->utf8_length() == 0) { 1216 group_index = 0; // default contended group 1217 } 1218 } 1219 coll->set_contended_group(group_index); 1220 } 1221 } 1222 } 1223 1224 1225 // Parse attributes for a field. 1226 void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs, 1227 u2 attributes_count, 1228 bool is_static, u2 signature_index, 1229 u2* const constantvalue_index_addr, 1230 bool* const is_synthetic_addr, 1231 u2* const generic_signature_index_addr, 1232 ClassFileParser::FieldAnnotationCollector* parsed_annotations, 1233 TRAPS) { 1234 assert(cfs != NULL, "invariant"); 1235 assert(constantvalue_index_addr != NULL, "invariant"); 1236 assert(is_synthetic_addr != NULL, "invariant"); 1237 assert(generic_signature_index_addr != NULL, "invariant"); 1238 assert(parsed_annotations != NULL, "invariant"); 1239 assert(attributes_count > 0, "attributes_count should be greater than 0"); 1240 1241 u2 constantvalue_index = 0; 1242 u2 generic_signature_index = 0; 1243 bool is_synthetic = false; 1244 const u1* runtime_visible_annotations = NULL; 1245 int runtime_visible_annotations_length = 0; 1246 const u1* runtime_invisible_annotations = NULL; 1247 int runtime_invisible_annotations_length = 0; 1248 const u1* runtime_visible_type_annotations = NULL; 1249 int runtime_visible_type_annotations_length = 0; 1250 const u1* runtime_invisible_type_annotations = NULL; 1251 int runtime_invisible_type_annotations_length = 0; 1252 bool runtime_invisible_annotations_exists = false; 1253 bool runtime_invisible_type_annotations_exists = false; 1254 const ConstantPool* const cp = _cp; 1255 1256 while (attributes_count--) { 1257 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 1258 const u2 attribute_name_index = cfs->get_u2_fast(); 1259 const u4 attribute_length = cfs->get_u4_fast(); 1260 check_property(valid_symbol_at(attribute_name_index), 1261 "Invalid field attribute index %u in class file %s", 1262 attribute_name_index, 1263 CHECK); 1264 1265 const Symbol* const attribute_name = cp->symbol_at(attribute_name_index); 1266 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { 1267 // ignore if non-static 1268 if (constantvalue_index != 0) { 1269 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); 1270 } 1271 check_property( 1272 attribute_length == 2, 1273 "Invalid ConstantValue field attribute length %u in class file %s", 1274 attribute_length, CHECK); 1275 1276 constantvalue_index = cfs->get_u2(CHECK); 1277 if (_need_verify) { 1278 verify_constantvalue(cp, constantvalue_index, signature_index, CHECK); 1279 } 1280 } else if (attribute_name == vmSymbols::tag_synthetic()) { 1281 if (attribute_length != 0) { 1282 classfile_parse_error( 1283 "Invalid Synthetic field attribute length %u in class file %s", 1284 attribute_length, CHECK); 1285 } 1286 is_synthetic = true; 1287 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 1288 if (attribute_length != 0) { 1289 classfile_parse_error( 1290 "Invalid Deprecated field attribute length %u in class file %s", 1291 attribute_length, CHECK); 1292 } 1293 } else if (_major_version >= JAVA_1_5_VERSION) { 1294 if (attribute_name == vmSymbols::tag_signature()) { 1295 if (generic_signature_index != 0) { 1296 classfile_parse_error( 1297 "Multiple Signature attributes for field in class file %s", CHECK); 1298 } 1299 if (attribute_length != 2) { 1300 classfile_parse_error( 1301 "Wrong size %u for field's Signature attribute in class file %s", 1302 attribute_length, CHECK); 1303 } 1304 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK); 1305 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 1306 if (runtime_visible_annotations != NULL) { 1307 classfile_parse_error( 1308 "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); 1309 } 1310 runtime_visible_annotations_length = attribute_length; 1311 runtime_visible_annotations = cfs->get_u1_buffer(); 1312 assert(runtime_visible_annotations != NULL, "null visible annotations"); 1313 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 1314 parse_annotations(cp, 1315 runtime_visible_annotations, 1316 runtime_visible_annotations_length, 1317 parsed_annotations, 1318 _loader_data, 1319 CHECK); 1320 cfs->skip_u1_fast(runtime_visible_annotations_length); 1321 } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 1322 if (runtime_invisible_annotations_exists) { 1323 classfile_parse_error( 1324 "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); 1325 } 1326 runtime_invisible_annotations_exists = true; 1327 if (PreserveAllAnnotations) { 1328 runtime_invisible_annotations_length = attribute_length; 1329 runtime_invisible_annotations = cfs->get_u1_buffer(); 1330 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 1331 } 1332 cfs->skip_u1(attribute_length, CHECK); 1333 } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 1334 if (runtime_visible_type_annotations != NULL) { 1335 classfile_parse_error( 1336 "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); 1337 } 1338 runtime_visible_type_annotations_length = attribute_length; 1339 runtime_visible_type_annotations = cfs->get_u1_buffer(); 1340 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 1341 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 1342 } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 1343 if (runtime_invisible_type_annotations_exists) { 1344 classfile_parse_error( 1345 "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); 1346 } else { 1347 runtime_invisible_type_annotations_exists = true; 1348 } 1349 if (PreserveAllAnnotations) { 1350 runtime_invisible_type_annotations_length = attribute_length; 1351 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 1352 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 1353 } 1354 cfs->skip_u1(attribute_length, CHECK); 1355 } else { 1356 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1357 } 1358 } else { 1359 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes 1360 } 1361 } 1362 1363 *constantvalue_index_addr = constantvalue_index; 1364 *is_synthetic_addr = is_synthetic; 1365 *generic_signature_index_addr = generic_signature_index; 1366 AnnotationArray* a = assemble_annotations(runtime_visible_annotations, 1367 runtime_visible_annotations_length, 1368 runtime_invisible_annotations, 1369 runtime_invisible_annotations_length, 1370 CHECK); 1371 parsed_annotations->set_field_annotations(a); 1372 a = assemble_annotations(runtime_visible_type_annotations, 1373 runtime_visible_type_annotations_length, 1374 runtime_invisible_type_annotations, 1375 runtime_invisible_type_annotations_length, 1376 CHECK); 1377 parsed_annotations->set_field_type_annotations(a); 1378 return; 1379 } 1380 1381 1382 // Field allocation types. Used for computing field offsets. 1383 1384 enum FieldAllocationType { 1385 STATIC_OOP, // Oops 1386 STATIC_BYTE, // Boolean, Byte, char 1387 STATIC_SHORT, // shorts 1388 STATIC_WORD, // ints 1389 STATIC_DOUBLE, // aligned long or double 1390 STATIC_VALUETYPE, // Value types 1391 NONSTATIC_OOP, 1392 NONSTATIC_BYTE, 1393 NONSTATIC_SHORT, 1394 NONSTATIC_WORD, 1395 NONSTATIC_DOUBLE, 1396 NONSTATIC_VALUETYPE, 1397 MAX_FIELD_ALLOCATION_TYPE, 1398 BAD_ALLOCATION_TYPE = -1 1399 }; 1400 1401 static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { 1402 BAD_ALLOCATION_TYPE, // 0 1403 BAD_ALLOCATION_TYPE, // 1 1404 BAD_ALLOCATION_TYPE, // 2 1405 BAD_ALLOCATION_TYPE, // 3 1406 NONSTATIC_BYTE , // T_BOOLEAN = 4, 1407 NONSTATIC_SHORT, // T_CHAR = 5, 1408 NONSTATIC_WORD, // T_FLOAT = 6, 1409 NONSTATIC_DOUBLE, // T_DOUBLE = 7, 1410 NONSTATIC_BYTE, // T_BYTE = 8, 1411 NONSTATIC_SHORT, // T_SHORT = 9, 1412 NONSTATIC_WORD, // T_INT = 10, 1413 NONSTATIC_DOUBLE, // T_LONG = 11, 1414 NONSTATIC_OOP, // T_OBJECT = 12, 1415 NONSTATIC_OOP, // T_ARRAY = 13, 1416 NONSTATIC_VALUETYPE, // T_VALUETYPE = 14, 1417 BAD_ALLOCATION_TYPE, // T_VOID = 15, 1418 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16, 1419 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17, 1420 BAD_ALLOCATION_TYPE, // T_METADATA = 18, 1421 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19, 1422 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20, 1423 BAD_ALLOCATION_TYPE, // 0 1424 BAD_ALLOCATION_TYPE, // 1 1425 BAD_ALLOCATION_TYPE, // 2 1426 BAD_ALLOCATION_TYPE, // 3 1427 STATIC_BYTE , // T_BOOLEAN = 4, 1428 STATIC_SHORT, // T_CHAR = 5, 1429 STATIC_WORD, // T_FLOAT = 6, 1430 STATIC_DOUBLE, // T_DOUBLE = 7, 1431 STATIC_BYTE, // T_BYTE = 8, 1432 STATIC_SHORT, // T_SHORT = 9, 1433 STATIC_WORD, // T_INT = 10, 1434 STATIC_DOUBLE, // T_LONG = 11, 1435 STATIC_OOP, // T_OBJECT = 12, 1436 STATIC_OOP, // T_ARRAY = 13, 1437 STATIC_VALUETYPE, // T_VALUETYPE = 14, 1438 BAD_ALLOCATION_TYPE, // T_VOID = 15, 1439 BAD_ALLOCATION_TYPE, // T_ADDRESS = 16, 1440 BAD_ALLOCATION_TYPE, // T_NARROWOOP = 17, 1441 BAD_ALLOCATION_TYPE, // T_METADATA = 18, 1442 BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 19, 1443 BAD_ALLOCATION_TYPE, // T_CONFLICT = 20, 1444 }; 1445 1446 static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { 1447 assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); 1448 FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; 1449 assert(result != BAD_ALLOCATION_TYPE, "bad type"); 1450 return result; 1451 } 1452 1453 class ClassFileParser::FieldAllocationCount : public ResourceObj { 1454 public: 1455 u2 count[MAX_FIELD_ALLOCATION_TYPE]; 1456 1457 FieldAllocationCount() { 1458 for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { 1459 count[i] = 0; 1460 } 1461 } 1462 1463 FieldAllocationType update(bool is_static, BasicType type) { 1464 FieldAllocationType atype = basic_type_to_atype(is_static, type); 1465 if (atype != BAD_ALLOCATION_TYPE) { 1466 // Make sure there is no overflow with injected fields. 1467 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1468 count[atype]++; 1469 } 1470 return atype; 1471 } 1472 }; 1473 1474 // Side-effects: populates the _fields, _fields_annotations, 1475 // _fields_type_annotations fields 1476 void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1477 bool is_interface, 1478 FieldAllocationCount* const fac, 1479 ConstantPool* cp, 1480 const int cp_size, 1481 u2* const java_fields_count_ptr, 1482 TRAPS) { 1483 1484 assert(cfs != NULL, "invariant"); 1485 assert(fac != NULL, "invariant"); 1486 assert(cp != NULL, "invariant"); 1487 assert(java_fields_count_ptr != NULL, "invariant"); 1488 1489 assert(NULL == _fields, "invariant"); 1490 assert(NULL == _fields_annotations, "invariant"); 1491 assert(NULL == _fields_type_annotations, "invariant"); 1492 1493 cfs->guarantee_more(2, CHECK); // length 1494 const u2 length = cfs->get_u2_fast(); 1495 *java_fields_count_ptr = length; 1496 1497 int num_injected = 0; 1498 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1499 &num_injected); 1500 const int total_fields = length + num_injected; 1501 1502 // The field array starts with tuples of shorts 1503 // [access, name index, sig index, initial value index, byte offset]. 1504 // A generic signature slot only exists for field with generic 1505 // signature attribute. And the access flag is set with 1506 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1507 // signature slots are at the end of the field array and after all 1508 // other fields data. 1509 // 1510 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1511 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1512 // ... 1513 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1514 // [generic signature index] 1515 // [generic signature index] 1516 // ... 1517 // 1518 // Allocate a temporary resource array for field data. For each field, 1519 // a slot is reserved in the temporary array for the generic signature 1520 // index. After parsing all fields, the data are copied to a permanent 1521 // array and any unused slots will be discarded. 1522 ResourceMark rm(THREAD); 1523 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1524 u2, 1525 total_fields * (FieldInfo::field_slots + 1)); 1526 1527 // The generic signature slots start after all other fields' data. 1528 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1529 int num_generic_signature = 0; 1530 for (int n = 0; n < length; n++) { 1531 // access_flags, name_index, descriptor_index, attributes_count 1532 cfs->guarantee_more(8, CHECK); 1533 1534 AccessFlags access_flags; 1535 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1536 verify_legal_field_modifiers(flags, is_interface, CHECK); 1537 access_flags.set_flags(flags); 1538 1539 const u2 name_index = cfs->get_u2_fast(); 1540 check_property(valid_symbol_at(name_index), 1541 "Invalid constant pool index %u for field name in class file %s", 1542 name_index, CHECK); 1543 const Symbol* const name = cp->symbol_at(name_index); 1544 verify_legal_field_name(name, CHECK); 1545 1546 const u2 signature_index = cfs->get_u2_fast(); 1547 check_property(valid_symbol_at(signature_index), 1548 "Invalid constant pool index %u for field signature in class file %s", 1549 signature_index, CHECK); 1550 const Symbol* const sig = cp->symbol_at(signature_index); 1551 verify_legal_field_signature(name, sig, CHECK); 1552 if (sig->starts_with("Q")) { 1553 _has_value_fields = true; 1554 } 1555 1556 u2 constantvalue_index = 0; 1557 bool is_synthetic = false; 1558 u2 generic_signature_index = 0; 1559 const bool is_static = access_flags.is_static(); 1560 FieldAnnotationCollector parsed_annotations(_loader_data); 1561 1562 const u2 attributes_count = cfs->get_u2_fast(); 1563 if (attributes_count > 0) { 1564 parse_field_attributes(cfs, 1565 attributes_count, 1566 is_static, 1567 signature_index, 1568 &constantvalue_index, 1569 &is_synthetic, 1570 &generic_signature_index, 1571 &parsed_annotations, 1572 CHECK); 1573 1574 if (parsed_annotations.field_annotations() != NULL) { 1575 if (_fields_annotations == NULL) { 1576 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1577 _loader_data, length, NULL, 1578 CHECK); 1579 } 1580 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1581 parsed_annotations.set_field_annotations(NULL); 1582 } 1583 if (parsed_annotations.field_type_annotations() != NULL) { 1584 if (_fields_type_annotations == NULL) { 1585 _fields_type_annotations = 1586 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1587 length, 1588 NULL, 1589 CHECK); 1590 } 1591 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1592 parsed_annotations.set_field_type_annotations(NULL); 1593 } 1594 1595 if (is_synthetic) { 1596 access_flags.set_is_synthetic(); 1597 } 1598 if (generic_signature_index != 0) { 1599 access_flags.set_field_has_generic_signature(); 1600 fa[generic_signature_slot] = generic_signature_index; 1601 generic_signature_slot ++; 1602 num_generic_signature ++; 1603 } 1604 } 1605 1606 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1607 field->initialize(access_flags.as_short(), 1608 name_index, 1609 signature_index, 1610 constantvalue_index); 1611 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1612 1613 // Remember how many oops we encountered and compute allocation type 1614 const FieldAllocationType atype = fac->update(is_static, type); 1615 field->set_allocation_type(atype); 1616 1617 // After field is initialized with type, we can augment it with aux info 1618 if (parsed_annotations.has_any_annotations()) 1619 parsed_annotations.apply_to(field); 1620 } 1621 1622 int index = length; 1623 if (num_injected != 0) { 1624 for (int n = 0; n < num_injected; n++) { 1625 // Check for duplicates 1626 if (injected[n].may_be_java) { 1627 const Symbol* const name = injected[n].name(); 1628 const Symbol* const signature = injected[n].signature(); 1629 bool duplicate = false; 1630 for (int i = 0; i < length; i++) { 1631 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1632 if (name == cp->symbol_at(f->name_index()) && 1633 signature == cp->symbol_at(f->signature_index())) { 1634 // Symbol is desclared in Java so skip this one 1635 duplicate = true; 1636 break; 1637 } 1638 } 1639 if (duplicate) { 1640 // These will be removed from the field array at the end 1641 continue; 1642 } 1643 } 1644 1645 // Injected field 1646 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1647 field->initialize(JVM_ACC_FIELD_INTERNAL, 1648 injected[n].name_index, 1649 injected[n].signature_index, 1650 0); 1651 1652 const BasicType type = FieldType::basic_type(injected[n].signature()); 1653 1654 // Remember how many oops we encountered and compute allocation type 1655 const FieldAllocationType atype = fac->update(false, type); 1656 field->set_allocation_type(atype); 1657 index++; 1658 } 1659 } 1660 1661 assert(NULL == _fields, "invariant"); 1662 1663 _fields = 1664 MetadataFactory::new_array<u2>(_loader_data, 1665 index * FieldInfo::field_slots + num_generic_signature, 1666 CHECK); 1667 // Sometimes injected fields already exist in the Java source so 1668 // the fields array could be too long. In that case the 1669 // fields array is trimed. Also unused slots that were reserved 1670 // for generic signature indexes are discarded. 1671 { 1672 int i = 0; 1673 for (; i < index * FieldInfo::field_slots; i++) { 1674 _fields->at_put(i, fa[i]); 1675 } 1676 for (int j = total_fields * FieldInfo::field_slots; 1677 j < generic_signature_slot; j++) { 1678 _fields->at_put(i++, fa[j]); 1679 } 1680 assert(_fields->length() == i, ""); 1681 } 1682 1683 if (_need_verify && length > 1) { 1684 // Check duplicated fields 1685 ResourceMark rm(THREAD); 1686 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1687 THREAD, NameSigHash*, HASH_ROW_SIZE); 1688 initialize_hashtable(names_and_sigs); 1689 bool dup = false; 1690 const Symbol* name = NULL; 1691 const Symbol* sig = NULL; 1692 { 1693 debug_only(NoSafepointVerifier nsv;) 1694 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1695 name = fs.name(); 1696 sig = fs.signature(); 1697 // If no duplicates, add name/signature in hashtable names_and_sigs. 1698 if (!put_after_lookup(name, sig, names_and_sigs)) { 1699 dup = true; 1700 break; 1701 } 1702 } 1703 } 1704 if (dup) { 1705 classfile_parse_error("Duplicate field name \"%s\" with signature \"%s\" in class file %s", 1706 name->as_C_string(), sig->as_klass_external_name(), CHECK); 1707 } 1708 } 1709 } 1710 1711 1712 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1713 while (length-- > 0) { 1714 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1715 } 1716 } 1717 1718 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1719 u4 code_length, 1720 u4 exception_table_length, 1721 TRAPS) { 1722 assert(cfs != NULL, "invariant"); 1723 1724 const u2* const exception_table_start = cfs->get_u2_buffer(); 1725 assert(exception_table_start != NULL, "null exception table"); 1726 1727 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1728 // end_pc, 1729 // handler_pc, 1730 // catch_type_index 1731 1732 // Will check legal target after parsing code array in verifier. 1733 if (_need_verify) { 1734 for (unsigned int i = 0; i < exception_table_length; i++) { 1735 const u2 start_pc = cfs->get_u2_fast(); 1736 const u2 end_pc = cfs->get_u2_fast(); 1737 const u2 handler_pc = cfs->get_u2_fast(); 1738 const u2 catch_type_index = cfs->get_u2_fast(); 1739 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1740 "Illegal exception table range in class file %s", 1741 CHECK_NULL); 1742 guarantee_property(handler_pc < code_length, 1743 "Illegal exception table handler in class file %s", 1744 CHECK_NULL); 1745 if (catch_type_index != 0) { 1746 guarantee_property(valid_klass_reference_at(catch_type_index), 1747 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1748 } 1749 } 1750 } else { 1751 cfs->skip_u2_fast(exception_table_length * 4); 1752 } 1753 return exception_table_start; 1754 } 1755 1756 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1757 u4 code_length, 1758 CompressedLineNumberWriteStream**const write_stream, 1759 TRAPS) { 1760 1761 const ClassFileStream* const cfs = _stream; 1762 unsigned int num_entries = cfs->get_u2(CHECK); 1763 1764 // Each entry is a u2 start_pc, and a u2 line_number 1765 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1766 1767 // Verify line number attribute and table length 1768 check_property( 1769 code_attribute_length == sizeof(u2) + length_in_bytes, 1770 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1771 1772 cfs->guarantee_more(length_in_bytes, CHECK); 1773 1774 if ((*write_stream) == NULL) { 1775 if (length_in_bytes > fixed_buffer_size) { 1776 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1777 } else { 1778 (*write_stream) = new CompressedLineNumberWriteStream( 1779 _linenumbertable_buffer, fixed_buffer_size); 1780 } 1781 } 1782 1783 while (num_entries-- > 0) { 1784 const u2 bci = cfs->get_u2_fast(); // start_pc 1785 const u2 line = cfs->get_u2_fast(); // line_number 1786 guarantee_property(bci < code_length, 1787 "Invalid pc in LineNumberTable in class file %s", CHECK); 1788 (*write_stream)->write_pair(bci, line); 1789 } 1790 } 1791 1792 1793 class LVT_Hash : public AllStatic { 1794 public: 1795 1796 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1797 /* 1798 * 3-tuple start_bci/length/slot has to be unique key, 1799 * so the following comparison seems to be redundant: 1800 * && elem->name_cp_index == entry->_elem->name_cp_index 1801 */ 1802 return (e0.start_bci == e1.start_bci && 1803 e0.length == e1.length && 1804 e0.name_cp_index == e1.name_cp_index && 1805 e0.slot == e1.slot); 1806 } 1807 1808 static unsigned int hash(LocalVariableTableElement const& e0) { 1809 unsigned int raw_hash = e0.start_bci; 1810 1811 raw_hash = e0.length + raw_hash * 37; 1812 raw_hash = e0.name_cp_index + raw_hash * 37; 1813 raw_hash = e0.slot + raw_hash * 37; 1814 1815 return raw_hash; 1816 } 1817 }; 1818 1819 1820 // Class file LocalVariableTable elements. 1821 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1822 public: 1823 u2 start_bci; 1824 u2 length; 1825 u2 name_cp_index; 1826 u2 descriptor_cp_index; 1827 u2 slot; 1828 }; 1829 1830 static void copy_lvt_element(const Classfile_LVT_Element* const src, 1831 LocalVariableTableElement* const lvt) { 1832 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1833 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1834 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1835 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1836 lvt->signature_cp_index = 0; 1837 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1838 } 1839 1840 // Function is used to parse both attributes: 1841 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1842 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1843 u4 code_length, 1844 u2 max_locals, 1845 u4 code_attribute_length, 1846 u2* const localvariable_table_length, 1847 bool isLVTT, 1848 TRAPS) { 1849 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1850 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1851 const unsigned int size = 1852 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1853 1854 const ConstantPool* const cp = _cp; 1855 1856 // Verify local variable table attribute has right length 1857 if (_need_verify) { 1858 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1859 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1860 } 1861 1862 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1863 assert(localvariable_table_start != NULL, "null local variable table"); 1864 if (!_need_verify) { 1865 cfs->skip_u2_fast(size); 1866 } else { 1867 cfs->guarantee_more(size * 2, CHECK_NULL); 1868 for(int i = 0; i < (*localvariable_table_length); i++) { 1869 const u2 start_pc = cfs->get_u2_fast(); 1870 const u2 length = cfs->get_u2_fast(); 1871 const u2 name_index = cfs->get_u2_fast(); 1872 const u2 descriptor_index = cfs->get_u2_fast(); 1873 const u2 index = cfs->get_u2_fast(); 1874 // Assign to a u4 to avoid overflow 1875 const u4 end_pc = (u4)start_pc + (u4)length; 1876 1877 if (start_pc >= code_length) { 1878 classfile_parse_error( 1879 "Invalid start_pc %u in %s in class file %s", 1880 start_pc, tbl_name, CHECK_NULL); 1881 } 1882 if (end_pc > code_length) { 1883 classfile_parse_error( 1884 "Invalid length %u in %s in class file %s", 1885 length, tbl_name, CHECK_NULL); 1886 } 1887 const int cp_size = cp->length(); 1888 guarantee_property(valid_symbol_at(name_index), 1889 "Name index %u in %s has bad constant type in class file %s", 1890 name_index, tbl_name, CHECK_NULL); 1891 guarantee_property(valid_symbol_at(descriptor_index), 1892 "Signature index %u in %s has bad constant type in class file %s", 1893 descriptor_index, tbl_name, CHECK_NULL); 1894 1895 const Symbol* const name = cp->symbol_at(name_index); 1896 const Symbol* const sig = cp->symbol_at(descriptor_index); 1897 verify_legal_field_name(name, CHECK_NULL); 1898 u2 extra_slot = 0; 1899 if (!isLVTT) { 1900 verify_legal_field_signature(name, sig, CHECK_NULL); 1901 1902 // 4894874: check special cases for double and long local variables 1903 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1904 sig == vmSymbols::type_signature(T_LONG)) { 1905 extra_slot = 1; 1906 } 1907 } 1908 guarantee_property((index + extra_slot) < max_locals, 1909 "Invalid index %u in %s in class file %s", 1910 index, tbl_name, CHECK_NULL); 1911 } 1912 } 1913 return localvariable_table_start; 1914 } 1915 1916 1917 void ClassFileParser::parse_type_array(u2 array_length, 1918 u4 code_length, 1919 u4* const u1_index, 1920 u4* const u2_index, 1921 u1* const u1_array, 1922 u2* const u2_array, 1923 TRAPS) { 1924 const ClassFileStream* const cfs = _stream; 1925 u2 index = 0; // index in the array with long/double occupying two slots 1926 u4 i1 = *u1_index; 1927 u4 i2 = *u2_index + 1; 1928 for(int i = 0; i < array_length; i++) { 1929 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1930 index++; 1931 if (tag == ITEM_Long || tag == ITEM_Double) { 1932 index++; 1933 } else if (tag == ITEM_Object) { 1934 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1935 guarantee_property(valid_klass_reference_at(class_index), 1936 "Bad class index %u in StackMap in class file %s", 1937 class_index, CHECK); 1938 } else if (tag == ITEM_Uninitialized) { 1939 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1940 guarantee_property( 1941 offset < code_length, 1942 "Bad uninitialized type offset %u in StackMap in class file %s", 1943 offset, CHECK); 1944 } else { 1945 guarantee_property( 1946 tag <= (u1)ITEM_Uninitialized, 1947 "Unknown variable type %u in StackMap in class file %s", 1948 tag, CHECK); 1949 } 1950 } 1951 u2_array[*u2_index] = index; 1952 *u1_index = i1; 1953 *u2_index = i2; 1954 } 1955 1956 static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1957 u4 code_attribute_length, 1958 bool need_verify, 1959 TRAPS) { 1960 assert(cfs != NULL, "invariant"); 1961 1962 if (0 == code_attribute_length) { 1963 return NULL; 1964 } 1965 1966 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1967 assert(stackmap_table_start != NULL, "null stackmap table"); 1968 1969 // check code_attribute_length first 1970 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1971 1972 if (!need_verify && !DumpSharedSpaces) { 1973 return NULL; 1974 } 1975 return stackmap_table_start; 1976 } 1977 1978 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1979 u2* const checked_exceptions_length, 1980 u4 method_attribute_length, 1981 TRAPS) { 1982 assert(cfs != NULL, "invariant"); 1983 assert(checked_exceptions_length != NULL, "invariant"); 1984 1985 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1986 *checked_exceptions_length = cfs->get_u2_fast(); 1987 const unsigned int size = 1988 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1989 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1990 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1991 if (!_need_verify) { 1992 cfs->skip_u2_fast(size); 1993 } else { 1994 // Verify each value in the checked exception table 1995 u2 checked_exception; 1996 const u2 len = *checked_exceptions_length; 1997 cfs->guarantee_more(2 * len, CHECK_NULL); 1998 for (int i = 0; i < len; i++) { 1999 checked_exception = cfs->get_u2_fast(); 2000 check_property( 2001 valid_klass_reference_at(checked_exception), 2002 "Exception name has bad type at constant pool %u in class file %s", 2003 checked_exception, CHECK_NULL); 2004 } 2005 } 2006 // check exceptions attribute length 2007 if (_need_verify) { 2008 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 2009 sizeof(u2) * size), 2010 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 2011 } 2012 return checked_exceptions_start; 2013 } 2014 2015 void ClassFileParser::throwIllegalSignature(const char* type, 2016 const Symbol* name, 2017 const Symbol* sig, 2018 TRAPS) const { 2019 assert(name != NULL, "invariant"); 2020 assert(sig != NULL, "invariant"); 2021 2022 ResourceMark rm(THREAD); 2023 Exceptions::fthrow(THREAD_AND_LOCATION, 2024 vmSymbols::java_lang_ClassFormatError(), 2025 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 2026 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 2027 } 2028 2029 AnnotationCollector::ID 2030 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 2031 const Symbol* name) { 2032 const vmSymbols::SID sid = vmSymbols::find_sid(name); 2033 // Privileged code can use all annotations. Other code silently drops some. 2034 const bool privileged = loader_data->is_the_null_class_loader_data() || 2035 loader_data->is_platform_class_loader_data() || 2036 loader_data->is_anonymous(); 2037 switch (sid) { 2038 case vmSymbols::VM_SYMBOL_ENUM_NAME(reflect_CallerSensitive_signature): { 2039 if (_location != _in_method) break; // only allow for methods 2040 if (!privileged) break; // only allow in privileged code 2041 return _method_CallerSensitive; 2042 } 2043 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 2044 if (_location != _in_method) break; // only allow for methods 2045 if (!privileged) break; // only allow in privileged code 2046 return _method_ForceInline; 2047 } 2048 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 2049 if (_location != _in_method) break; // only allow for methods 2050 if (!privileged) break; // only allow in privileged code 2051 return _method_DontInline; 2052 } 2053 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 2054 if (_location != _in_method) break; // only allow for methods 2055 if (!privileged) break; // only allow in privileged code 2056 return _method_InjectedProfile; 2057 } 2058 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 2059 if (_location != _in_method) break; // only allow for methods 2060 if (!privileged) break; // only allow in privileged code 2061 return _method_LambdaForm_Compiled; 2062 } 2063 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 2064 if (_location != _in_method) break; // only allow for methods 2065 if (!privileged) break; // only allow in privileged code 2066 return _method_LambdaForm_Hidden; 2067 } 2068 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 2069 if (_location != _in_method) break; // only allow for methods 2070 if (!privileged) break; // only allow in privileged code 2071 return _method_HotSpotIntrinsicCandidate; 2072 } 2073 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2074 if (_location != _in_field) break; // only allow for fields 2075 if (!privileged) break; // only allow in privileged code 2076 return _field_Stable; 2077 } 2078 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2079 if (_location != _in_field && _location != _in_class) { 2080 break; // only allow for fields and classes 2081 } 2082 if (!EnableContended || (RestrictContended && !privileged)) { 2083 break; // honor privileges 2084 } 2085 return _jdk_internal_vm_annotation_Contended; 2086 } 2087 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2088 if (_location != _in_method) break; // only allow for methods 2089 if (RestrictReservedStack && !privileged) break; // honor privileges 2090 return _jdk_internal_vm_annotation_ReservedStackAccess; 2091 } 2092 case vmSymbols::VM_SYMBOL_ENUM_NAME(jvm_internal_value_DeriveValueType_signature) : { 2093 if (_location != _in_class) { 2094 break; 2095 } 2096 return _jvm_internal_value_DeriveValueType; 2097 } 2098 default: { 2099 break; 2100 } 2101 } 2102 return AnnotationCollector::_unknown; 2103 } 2104 2105 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2106 if (is_contended()) 2107 f->set_contended_group(contended_group()); 2108 if (is_stable()) 2109 f->set_stable(true); 2110 } 2111 2112 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2113 // If there's an error deallocate metadata for field annotations 2114 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2115 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2116 } 2117 2118 void MethodAnnotationCollector::apply_to(methodHandle m) { 2119 if (has_annotation(_method_CallerSensitive)) 2120 m->set_caller_sensitive(true); 2121 if (has_annotation(_method_ForceInline)) 2122 m->set_force_inline(true); 2123 if (has_annotation(_method_DontInline)) 2124 m->set_dont_inline(true); 2125 if (has_annotation(_method_InjectedProfile)) 2126 m->set_has_injected_profile(true); 2127 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2128 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2129 if (has_annotation(_method_LambdaForm_Hidden)) 2130 m->set_hidden(true); 2131 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2132 m->set_intrinsic_candidate(true); 2133 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2134 m->set_has_reserved_stack_access(true); 2135 } 2136 2137 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2138 assert(ik != NULL, "invariant"); 2139 ik->set_is_contended(is_contended()); 2140 } 2141 2142 #define MAX_ARGS_SIZE 255 2143 #define MAX_CODE_SIZE 65535 2144 #define INITIAL_MAX_LVT_NUMBER 256 2145 2146 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2147 * 2148 * Rules for LVT's and LVTT's are: 2149 * - There can be any number of LVT's and LVTT's. 2150 * - If there are n LVT's, it is the same as if there was just 2151 * one LVT containing all the entries from the n LVT's. 2152 * - There may be no more than one LVT entry per local variable. 2153 * Two LVT entries are 'equal' if these fields are the same: 2154 * start_pc, length, name, slot 2155 * - There may be no more than one LVTT entry per each LVT entry. 2156 * Each LVTT entry has to match some LVT entry. 2157 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2158 */ 2159 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2160 int lvt_cnt, 2161 u2* const localvariable_table_length, 2162 const u2**const localvariable_table_start, 2163 int lvtt_cnt, 2164 u2* const localvariable_type_table_length, 2165 const u2**const localvariable_type_table_start, 2166 TRAPS) { 2167 2168 ResourceMark rm(THREAD); 2169 2170 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2171 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2172 2173 LVT_HashTable* const table = new LVT_HashTable(); 2174 2175 // To fill LocalVariableTable in 2176 const Classfile_LVT_Element* cf_lvt; 2177 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2178 2179 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2180 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2181 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2182 copy_lvt_element(&cf_lvt[idx], lvt); 2183 // If no duplicates, add LVT elem in hashtable. 2184 if (table->put(*lvt, lvt) == false 2185 && _need_verify 2186 && _major_version >= JAVA_1_5_VERSION) { 2187 classfile_parse_error("Duplicated LocalVariableTable attribute " 2188 "entry for '%s' in class file %s", 2189 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2190 CHECK); 2191 } 2192 } 2193 } 2194 2195 // To merge LocalVariableTable and LocalVariableTypeTable 2196 const Classfile_LVT_Element* cf_lvtt; 2197 LocalVariableTableElement lvtt_elem; 2198 2199 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2200 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2201 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2202 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2203 LocalVariableTableElement** entry = table->get(lvtt_elem); 2204 if (entry == NULL) { 2205 if (_need_verify) { 2206 classfile_parse_error("LVTT entry for '%s' in class file %s " 2207 "does not match any LVT entry", 2208 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2209 CHECK); 2210 } 2211 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2212 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2213 "entry for '%s' in class file %s", 2214 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2215 CHECK); 2216 } else { 2217 // to add generic signatures into LocalVariableTable 2218 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2219 } 2220 } 2221 } 2222 } 2223 2224 2225 void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2226 const u1* runtime_visible_annotations, 2227 int runtime_visible_annotations_length, 2228 const u1* runtime_invisible_annotations, 2229 int runtime_invisible_annotations_length, 2230 const u1* runtime_visible_parameter_annotations, 2231 int runtime_visible_parameter_annotations_length, 2232 const u1* runtime_invisible_parameter_annotations, 2233 int runtime_invisible_parameter_annotations_length, 2234 const u1* runtime_visible_type_annotations, 2235 int runtime_visible_type_annotations_length, 2236 const u1* runtime_invisible_type_annotations, 2237 int runtime_invisible_type_annotations_length, 2238 const u1* annotation_default, 2239 int annotation_default_length, 2240 TRAPS) { 2241 2242 AnnotationArray* a; 2243 2244 if (runtime_visible_annotations_length + 2245 runtime_invisible_annotations_length > 0) { 2246 a = assemble_annotations(runtime_visible_annotations, 2247 runtime_visible_annotations_length, 2248 runtime_invisible_annotations, 2249 runtime_invisible_annotations_length, 2250 CHECK); 2251 cm->set_method_annotations(a); 2252 } 2253 2254 if (runtime_visible_parameter_annotations_length + 2255 runtime_invisible_parameter_annotations_length > 0) { 2256 a = assemble_annotations(runtime_visible_parameter_annotations, 2257 runtime_visible_parameter_annotations_length, 2258 runtime_invisible_parameter_annotations, 2259 runtime_invisible_parameter_annotations_length, 2260 CHECK); 2261 cm->set_parameter_annotations(a); 2262 } 2263 2264 if (annotation_default_length > 0) { 2265 a = assemble_annotations(annotation_default, 2266 annotation_default_length, 2267 NULL, 2268 0, 2269 CHECK); 2270 cm->set_default_annotations(a); 2271 } 2272 2273 if (runtime_visible_type_annotations_length + 2274 runtime_invisible_type_annotations_length > 0) { 2275 a = assemble_annotations(runtime_visible_type_annotations, 2276 runtime_visible_type_annotations_length, 2277 runtime_invisible_type_annotations, 2278 runtime_invisible_type_annotations_length, 2279 CHECK); 2280 cm->set_type_annotations(a); 2281 } 2282 } 2283 2284 2285 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2286 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2287 // Method* to save footprint, so we only know the size of the resulting Method* when the 2288 // entire method attribute is parsed. 2289 // 2290 // The promoted_flags parameter is used to pass relevant access_flags 2291 // from the method back up to the containing klass. These flag values 2292 // are added to klass's access_flags. 2293 2294 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2295 bool is_interface, 2296 const ConstantPool* cp, 2297 AccessFlags* const promoted_flags, 2298 TRAPS) { 2299 assert(cfs != NULL, "invariant"); 2300 assert(cp != NULL, "invariant"); 2301 assert(promoted_flags != NULL, "invariant"); 2302 2303 ResourceMark rm(THREAD); 2304 // Parse fixed parts: 2305 // access_flags, name_index, descriptor_index, attributes_count 2306 cfs->guarantee_more(8, CHECK_NULL); 2307 2308 int flags = cfs->get_u2_fast(); 2309 const u2 name_index = cfs->get_u2_fast(); 2310 const int cp_size = cp->length(); 2311 check_property( 2312 valid_symbol_at(name_index), 2313 "Illegal constant pool index %u for method name in class file %s", 2314 name_index, CHECK_NULL); 2315 const Symbol* const name = cp->symbol_at(name_index); 2316 verify_legal_method_name(name, CHECK_NULL); 2317 2318 const u2 signature_index = cfs->get_u2_fast(); 2319 guarantee_property( 2320 valid_symbol_at(signature_index), 2321 "Illegal constant pool index %u for method signature in class file %s", 2322 signature_index, CHECK_NULL); 2323 const Symbol* const signature = cp->symbol_at(signature_index); 2324 2325 if (name == vmSymbols::class_initializer_name()) { 2326 // We ignore the other access flags for a valid class initializer. 2327 // (JVM Spec 2nd ed., chapter 4.6) 2328 if (_major_version < 51) { // backward compatibility 2329 flags = JVM_ACC_STATIC; 2330 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2331 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2332 } else { 2333 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2334 } 2335 } else { 2336 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2337 } 2338 2339 if (name == vmSymbols::object_initializer_name() && is_interface) { 2340 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2341 } 2342 2343 int args_size = -1; // only used when _need_verify is true 2344 if (_need_verify) { 2345 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2346 verify_legal_method_signature(name, signature, CHECK_NULL); 2347 if (args_size > MAX_ARGS_SIZE) { 2348 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2349 } 2350 } 2351 2352 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2353 2354 // Default values for code and exceptions attribute elements 2355 u2 max_stack = 0; 2356 u2 max_locals = 0; 2357 u4 code_length = 0; 2358 const u1* code_start = 0; 2359 u2 exception_table_length = 0; 2360 const u2* exception_table_start = NULL; 2361 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2362 u2 checked_exceptions_length = 0; 2363 const u2* checked_exceptions_start = NULL; 2364 CompressedLineNumberWriteStream* linenumber_table = NULL; 2365 int linenumber_table_length = 0; 2366 int total_lvt_length = 0; 2367 u2 lvt_cnt = 0; 2368 u2 lvtt_cnt = 0; 2369 bool lvt_allocated = false; 2370 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2371 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2372 u2* localvariable_table_length = NULL; 2373 const u2** localvariable_table_start = NULL; 2374 u2* localvariable_type_table_length = NULL; 2375 const u2** localvariable_type_table_start = NULL; 2376 int method_parameters_length = -1; 2377 const u1* method_parameters_data = NULL; 2378 bool method_parameters_seen = false; 2379 bool parsed_code_attribute = false; 2380 bool parsed_checked_exceptions_attribute = false; 2381 bool parsed_stackmap_attribute = false; 2382 // stackmap attribute - JDK1.5 2383 const u1* stackmap_data = NULL; 2384 int stackmap_data_length = 0; 2385 u2 generic_signature_index = 0; 2386 MethodAnnotationCollector parsed_annotations; 2387 const u1* runtime_visible_annotations = NULL; 2388 int runtime_visible_annotations_length = 0; 2389 const u1* runtime_invisible_annotations = NULL; 2390 int runtime_invisible_annotations_length = 0; 2391 const u1* runtime_visible_parameter_annotations = NULL; 2392 int runtime_visible_parameter_annotations_length = 0; 2393 const u1* runtime_invisible_parameter_annotations = NULL; 2394 int runtime_invisible_parameter_annotations_length = 0; 2395 const u1* runtime_visible_type_annotations = NULL; 2396 int runtime_visible_type_annotations_length = 0; 2397 const u1* runtime_invisible_type_annotations = NULL; 2398 int runtime_invisible_type_annotations_length = 0; 2399 bool runtime_invisible_annotations_exists = false; 2400 bool runtime_invisible_type_annotations_exists = false; 2401 bool runtime_invisible_parameter_annotations_exists = false; 2402 const u1* annotation_default = NULL; 2403 int annotation_default_length = 0; 2404 2405 // Parse code and exceptions attribute 2406 u2 method_attributes_count = cfs->get_u2_fast(); 2407 while (method_attributes_count--) { 2408 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2409 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2410 const u4 method_attribute_length = cfs->get_u4_fast(); 2411 check_property( 2412 valid_symbol_at(method_attribute_name_index), 2413 "Invalid method attribute name index %u in class file %s", 2414 method_attribute_name_index, CHECK_NULL); 2415 2416 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2417 if (method_attribute_name == vmSymbols::tag_code()) { 2418 // Parse Code attribute 2419 if (_need_verify) { 2420 guarantee_property( 2421 !access_flags.is_native() && !access_flags.is_abstract(), 2422 "Code attribute in native or abstract methods in class file %s", 2423 CHECK_NULL); 2424 } 2425 if (parsed_code_attribute) { 2426 classfile_parse_error("Multiple Code attributes in class file %s", 2427 CHECK_NULL); 2428 } 2429 parsed_code_attribute = true; 2430 2431 // Stack size, locals size, and code size 2432 if (_major_version == 45 && _minor_version <= 2) { 2433 cfs->guarantee_more(4, CHECK_NULL); 2434 max_stack = cfs->get_u1_fast(); 2435 max_locals = cfs->get_u1_fast(); 2436 code_length = cfs->get_u2_fast(); 2437 } else { 2438 cfs->guarantee_more(8, CHECK_NULL); 2439 max_stack = cfs->get_u2_fast(); 2440 max_locals = cfs->get_u2_fast(); 2441 code_length = cfs->get_u4_fast(); 2442 } 2443 if (_need_verify) { 2444 guarantee_property(args_size <= max_locals, 2445 "Arguments can't fit into locals in class file %s", 2446 CHECK_NULL); 2447 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2448 "Invalid method Code length %u in class file %s", 2449 code_length, CHECK_NULL); 2450 } 2451 // Code pointer 2452 code_start = cfs->get_u1_buffer(); 2453 assert(code_start != NULL, "null code start"); 2454 cfs->guarantee_more(code_length, CHECK_NULL); 2455 cfs->skip_u1_fast(code_length); 2456 2457 // Exception handler table 2458 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2459 exception_table_length = cfs->get_u2_fast(); 2460 if (exception_table_length > 0) { 2461 exception_table_start = parse_exception_table(cfs, 2462 code_length, 2463 exception_table_length, 2464 CHECK_NULL); 2465 } 2466 2467 // Parse additional attributes in code attribute 2468 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2469 u2 code_attributes_count = cfs->get_u2_fast(); 2470 2471 unsigned int calculated_attribute_length = 0; 2472 2473 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2474 calculated_attribute_length = 2475 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2476 } else { 2477 // max_stack, locals and length are smaller in pre-version 45.2 classes 2478 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2479 } 2480 calculated_attribute_length += 2481 code_length + 2482 sizeof(exception_table_length) + 2483 sizeof(code_attributes_count) + 2484 exception_table_length * 2485 ( sizeof(u2) + // start_pc 2486 sizeof(u2) + // end_pc 2487 sizeof(u2) + // handler_pc 2488 sizeof(u2) ); // catch_type_index 2489 2490 while (code_attributes_count--) { 2491 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2492 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2493 const u4 code_attribute_length = cfs->get_u4_fast(); 2494 calculated_attribute_length += code_attribute_length + 2495 sizeof(code_attribute_name_index) + 2496 sizeof(code_attribute_length); 2497 check_property(valid_symbol_at(code_attribute_name_index), 2498 "Invalid code attribute name index %u in class file %s", 2499 code_attribute_name_index, 2500 CHECK_NULL); 2501 if (LoadLineNumberTables && 2502 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2503 // Parse and compress line number table 2504 parse_linenumber_table(code_attribute_length, 2505 code_length, 2506 &linenumber_table, 2507 CHECK_NULL); 2508 2509 } else if (LoadLocalVariableTables && 2510 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2511 // Parse local variable table 2512 if (!lvt_allocated) { 2513 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2514 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2515 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2516 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2517 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2518 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2519 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2520 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2521 lvt_allocated = true; 2522 } 2523 if (lvt_cnt == max_lvt_cnt) { 2524 max_lvt_cnt <<= 1; 2525 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2526 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2527 } 2528 localvariable_table_start[lvt_cnt] = 2529 parse_localvariable_table(cfs, 2530 code_length, 2531 max_locals, 2532 code_attribute_length, 2533 &localvariable_table_length[lvt_cnt], 2534 false, // is not LVTT 2535 CHECK_NULL); 2536 total_lvt_length += localvariable_table_length[lvt_cnt]; 2537 lvt_cnt++; 2538 } else if (LoadLocalVariableTypeTables && 2539 _major_version >= JAVA_1_5_VERSION && 2540 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2541 if (!lvt_allocated) { 2542 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2543 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2544 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2545 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2546 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2547 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2548 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2549 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2550 lvt_allocated = true; 2551 } 2552 // Parse local variable type table 2553 if (lvtt_cnt == max_lvtt_cnt) { 2554 max_lvtt_cnt <<= 1; 2555 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2556 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2557 } 2558 localvariable_type_table_start[lvtt_cnt] = 2559 parse_localvariable_table(cfs, 2560 code_length, 2561 max_locals, 2562 code_attribute_length, 2563 &localvariable_type_table_length[lvtt_cnt], 2564 true, // is LVTT 2565 CHECK_NULL); 2566 lvtt_cnt++; 2567 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2568 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2569 // Stack map is only needed by the new verifier in JDK1.5. 2570 if (parsed_stackmap_attribute) { 2571 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2572 } 2573 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2574 stackmap_data_length = code_attribute_length; 2575 parsed_stackmap_attribute = true; 2576 } else { 2577 // Skip unknown attributes 2578 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2579 } 2580 } 2581 // check method attribute length 2582 if (_need_verify) { 2583 guarantee_property(method_attribute_length == calculated_attribute_length, 2584 "Code segment has wrong length in class file %s", 2585 CHECK_NULL); 2586 } 2587 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2588 // Parse Exceptions attribute 2589 if (parsed_checked_exceptions_attribute) { 2590 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2591 CHECK_NULL); 2592 } 2593 parsed_checked_exceptions_attribute = true; 2594 checked_exceptions_start = 2595 parse_checked_exceptions(cfs, 2596 &checked_exceptions_length, 2597 method_attribute_length, 2598 CHECK_NULL); 2599 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2600 // reject multiple method parameters 2601 if (method_parameters_seen) { 2602 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2603 CHECK_NULL); 2604 } 2605 method_parameters_seen = true; 2606 method_parameters_length = cfs->get_u1_fast(); 2607 const u2 real_length = (method_parameters_length * 4u) + 1u; 2608 if (method_attribute_length != real_length) { 2609 classfile_parse_error( 2610 "Invalid MethodParameters method attribute length %u in class file", 2611 method_attribute_length, CHECK_NULL); 2612 } 2613 method_parameters_data = cfs->get_u1_buffer(); 2614 cfs->skip_u2_fast(method_parameters_length); 2615 cfs->skip_u2_fast(method_parameters_length); 2616 // ignore this attribute if it cannot be reflected 2617 if (!SystemDictionary::Parameter_klass_loaded()) 2618 method_parameters_length = -1; 2619 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2620 if (method_attribute_length != 0) { 2621 classfile_parse_error( 2622 "Invalid Synthetic method attribute length %u in class file %s", 2623 method_attribute_length, CHECK_NULL); 2624 } 2625 // Should we check that there hasn't already been a synthetic attribute? 2626 access_flags.set_is_synthetic(); 2627 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2628 if (method_attribute_length != 0) { 2629 classfile_parse_error( 2630 "Invalid Deprecated method attribute length %u in class file %s", 2631 method_attribute_length, CHECK_NULL); 2632 } 2633 } else if (_major_version >= JAVA_1_5_VERSION) { 2634 if (method_attribute_name == vmSymbols::tag_signature()) { 2635 if (generic_signature_index != 0) { 2636 classfile_parse_error( 2637 "Multiple Signature attributes for method in class file %s", 2638 CHECK_NULL); 2639 } 2640 if (method_attribute_length != 2) { 2641 classfile_parse_error( 2642 "Invalid Signature attribute length %u in class file %s", 2643 method_attribute_length, CHECK_NULL); 2644 } 2645 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2646 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2647 if (runtime_visible_annotations != NULL) { 2648 classfile_parse_error( 2649 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2650 CHECK_NULL); 2651 } 2652 runtime_visible_annotations_length = method_attribute_length; 2653 runtime_visible_annotations = cfs->get_u1_buffer(); 2654 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2655 cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL); 2656 parse_annotations(cp, 2657 runtime_visible_annotations, 2658 runtime_visible_annotations_length, 2659 &parsed_annotations, 2660 _loader_data, 2661 CHECK_NULL); 2662 cfs->skip_u1_fast(runtime_visible_annotations_length); 2663 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2664 if (runtime_invisible_annotations_exists) { 2665 classfile_parse_error( 2666 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2667 CHECK_NULL); 2668 } 2669 runtime_invisible_annotations_exists = true; 2670 if (PreserveAllAnnotations) { 2671 runtime_invisible_annotations_length = method_attribute_length; 2672 runtime_invisible_annotations = cfs->get_u1_buffer(); 2673 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2674 } 2675 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2676 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2677 if (runtime_visible_parameter_annotations != NULL) { 2678 classfile_parse_error( 2679 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2680 CHECK_NULL); 2681 } 2682 runtime_visible_parameter_annotations_length = method_attribute_length; 2683 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2684 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2685 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2686 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2687 if (runtime_invisible_parameter_annotations_exists) { 2688 classfile_parse_error( 2689 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2690 CHECK_NULL); 2691 } 2692 runtime_invisible_parameter_annotations_exists = true; 2693 if (PreserveAllAnnotations) { 2694 runtime_invisible_parameter_annotations_length = method_attribute_length; 2695 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2696 assert(runtime_invisible_parameter_annotations != NULL, 2697 "null invisible parameter annotations"); 2698 } 2699 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2700 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2701 if (annotation_default != NULL) { 2702 classfile_parse_error( 2703 "Multiple AnnotationDefault attributes for method in class file %s", 2704 CHECK_NULL); 2705 } 2706 annotation_default_length = method_attribute_length; 2707 annotation_default = cfs->get_u1_buffer(); 2708 assert(annotation_default != NULL, "null annotation default"); 2709 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2710 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2711 if (runtime_visible_type_annotations != NULL) { 2712 classfile_parse_error( 2713 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2714 CHECK_NULL); 2715 } 2716 runtime_visible_type_annotations_length = method_attribute_length; 2717 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2718 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2719 // No need for the VM to parse Type annotations 2720 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2721 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2722 if (runtime_invisible_type_annotations_exists) { 2723 classfile_parse_error( 2724 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2725 CHECK_NULL); 2726 } else { 2727 runtime_invisible_type_annotations_exists = true; 2728 } 2729 if (PreserveAllAnnotations) { 2730 runtime_invisible_type_annotations_length = method_attribute_length; 2731 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2732 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2733 } 2734 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2735 } else { 2736 // Skip unknown attributes 2737 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2738 } 2739 } else { 2740 // Skip unknown attributes 2741 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2742 } 2743 } 2744 2745 if (linenumber_table != NULL) { 2746 linenumber_table->write_terminator(); 2747 linenumber_table_length = linenumber_table->position(); 2748 } 2749 2750 // Make sure there's at least one Code attribute in non-native/non-abstract method 2751 if (_need_verify) { 2752 guarantee_property(access_flags.is_native() || 2753 access_flags.is_abstract() || 2754 parsed_code_attribute, 2755 "Absent Code attribute in method that is not native or abstract in class file %s", 2756 CHECK_NULL); 2757 } 2758 2759 // All sizing information for a Method* is finally available, now create it 2760 InlineTableSizes sizes( 2761 total_lvt_length, 2762 linenumber_table_length, 2763 exception_table_length, 2764 checked_exceptions_length, 2765 method_parameters_length, 2766 generic_signature_index, 2767 runtime_visible_annotations_length + 2768 runtime_invisible_annotations_length, 2769 runtime_visible_parameter_annotations_length + 2770 runtime_invisible_parameter_annotations_length, 2771 runtime_visible_type_annotations_length + 2772 runtime_invisible_type_annotations_length, 2773 annotation_default_length, 2774 0); 2775 2776 Method* const m = Method::allocate(_loader_data, 2777 code_length, 2778 access_flags, 2779 &sizes, 2780 ConstMethod::NORMAL, 2781 CHECK_NULL); 2782 2783 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2784 2785 // Fill in information from fixed part (access_flags already set) 2786 m->set_constants(_cp); 2787 m->set_name_index(name_index); 2788 m->set_signature_index(signature_index); 2789 2790 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2791 m->constMethod()->set_result_type(rtf.type()); 2792 2793 if (args_size >= 0) { 2794 m->set_size_of_parameters(args_size); 2795 } else { 2796 m->compute_size_of_parameters(THREAD); 2797 } 2798 #ifdef ASSERT 2799 if (args_size >= 0) { 2800 m->compute_size_of_parameters(THREAD); 2801 assert(args_size == m->size_of_parameters(), ""); 2802 } 2803 #endif 2804 2805 // Fill in code attribute information 2806 m->set_max_stack(max_stack); 2807 m->set_max_locals(max_locals); 2808 if (stackmap_data != NULL) { 2809 m->constMethod()->copy_stackmap_data(_loader_data, 2810 (u1*)stackmap_data, 2811 stackmap_data_length, 2812 CHECK_NULL); 2813 } 2814 2815 // Copy byte codes 2816 m->set_code((u1*)code_start); 2817 2818 // Copy line number table 2819 if (linenumber_table != NULL) { 2820 memcpy(m->compressed_linenumber_table(), 2821 linenumber_table->buffer(), 2822 linenumber_table_length); 2823 } 2824 2825 // Copy exception table 2826 if (exception_table_length > 0) { 2827 int size = 2828 exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); 2829 copy_u2_with_conversion((u2*) m->exception_table_start(), 2830 exception_table_start, size); 2831 } 2832 2833 // Copy method parameters 2834 if (method_parameters_length > 0) { 2835 MethodParametersElement* elem = m->constMethod()->method_parameters_start(); 2836 for (int i = 0; i < method_parameters_length; i++) { 2837 elem[i].name_cp_index = Bytes::get_Java_u2((address)method_parameters_data); 2838 method_parameters_data += 2; 2839 elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data); 2840 method_parameters_data += 2; 2841 } 2842 } 2843 2844 // Copy checked exceptions 2845 if (checked_exceptions_length > 0) { 2846 const int size = 2847 checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); 2848 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), 2849 checked_exceptions_start, 2850 size); 2851 } 2852 2853 // Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2854 if (total_lvt_length > 0) { 2855 promoted_flags->set_has_localvariable_table(); 2856 copy_localvariable_table(m->constMethod(), 2857 lvt_cnt, 2858 localvariable_table_length, 2859 localvariable_table_start, 2860 lvtt_cnt, 2861 localvariable_type_table_length, 2862 localvariable_type_table_start, 2863 CHECK_NULL); 2864 } 2865 2866 if (parsed_annotations.has_any_annotations()) 2867 parsed_annotations.apply_to(m); 2868 2869 // Copy annotations 2870 copy_method_annotations(m->constMethod(), 2871 runtime_visible_annotations, 2872 runtime_visible_annotations_length, 2873 runtime_invisible_annotations, 2874 runtime_invisible_annotations_length, 2875 runtime_visible_parameter_annotations, 2876 runtime_visible_parameter_annotations_length, 2877 runtime_invisible_parameter_annotations, 2878 runtime_invisible_parameter_annotations_length, 2879 runtime_visible_type_annotations, 2880 runtime_visible_type_annotations_length, 2881 runtime_invisible_type_annotations, 2882 runtime_invisible_type_annotations_length, 2883 annotation_default, 2884 annotation_default_length, 2885 CHECK_NULL); 2886 2887 if (name == vmSymbols::finalize_method_name() && 2888 signature == vmSymbols::void_method_signature()) { 2889 if (m->is_empty_method()) { 2890 _has_empty_finalizer = true; 2891 } else { 2892 _has_finalizer = true; 2893 } 2894 } 2895 if (name == vmSymbols::object_initializer_name() && 2896 signature == vmSymbols::void_method_signature() && 2897 m->is_vanilla_constructor()) { 2898 _has_vanilla_constructor = true; 2899 } 2900 2901 NOT_PRODUCT(m->verify()); 2902 return m; 2903 } 2904 2905 2906 // The promoted_flags parameter is used to pass relevant access_flags 2907 // from the methods back up to the containing klass. These flag values 2908 // are added to klass's access_flags. 2909 // Side-effects: populates the _methods field in the parser 2910 void ClassFileParser::parse_methods(const ClassFileStream* const cfs, 2911 bool is_interface, 2912 AccessFlags* promoted_flags, 2913 bool* has_final_method, 2914 bool* declares_nonstatic_concrete_methods, 2915 TRAPS) { 2916 assert(cfs != NULL, "invariant"); 2917 assert(promoted_flags != NULL, "invariant"); 2918 assert(has_final_method != NULL, "invariant"); 2919 assert(declares_nonstatic_concrete_methods != NULL, "invariant"); 2920 2921 assert(NULL == _methods, "invariant"); 2922 2923 cfs->guarantee_more(2, CHECK); // length 2924 const u2 length = cfs->get_u2_fast(); 2925 if (length == 0) { 2926 _methods = Universe::the_empty_method_array(); 2927 } else { 2928 _methods = MetadataFactory::new_array<Method*>(_loader_data, 2929 length, 2930 NULL, 2931 CHECK); 2932 2933 for (int index = 0; index < length; index++) { 2934 Method* method = parse_method(cfs, 2935 is_interface, 2936 _cp, 2937 promoted_flags, 2938 CHECK); 2939 2940 if (method->is_final()) { 2941 *has_final_method = true; 2942 } 2943 // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags 2944 // used for interface initialization, and default method inheritance analysis 2945 if (is_interface && !(*declares_nonstatic_concrete_methods) 2946 && !method->is_abstract() && !method->is_static()) { 2947 *declares_nonstatic_concrete_methods = true; 2948 } 2949 _methods->at_put(index, method); 2950 } 2951 2952 if (_need_verify && length > 1) { 2953 // Check duplicated methods 2954 ResourceMark rm(THREAD); 2955 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 2956 THREAD, NameSigHash*, HASH_ROW_SIZE); 2957 initialize_hashtable(names_and_sigs); 2958 bool dup = false; 2959 const Symbol* name = NULL; 2960 const Symbol* sig = NULL; 2961 { 2962 debug_only(NoSafepointVerifier nsv;) 2963 for (int i = 0; i < length; i++) { 2964 const Method* const m = _methods->at(i); 2965 name = m->name(); 2966 sig = m->signature(); 2967 // If no duplicates, add name/signature in hashtable names_and_sigs. 2968 if (!put_after_lookup(name, sig, names_and_sigs)) { 2969 dup = true; 2970 break; 2971 } 2972 } 2973 } 2974 if (dup) { 2975 classfile_parse_error("Duplicate method name \"%s\" with signature \"%s\" in class file %s", 2976 name->as_C_string(), sig->as_klass_external_name(), CHECK); 2977 } 2978 } 2979 } 2980 } 2981 2982 static const intArray* sort_methods(Array<Method*>* methods) { 2983 const int length = methods->length(); 2984 // If JVMTI original method ordering or sharing is enabled we have to 2985 // remember the original class file ordering. 2986 // We temporarily use the vtable_index field in the Method* to store the 2987 // class file index, so we can read in after calling qsort. 2988 // Put the method ordering in the shared archive. 2989 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 2990 for (int index = 0; index < length; index++) { 2991 Method* const m = methods->at(index); 2992 assert(!m->valid_vtable_index(), "vtable index should not be set"); 2993 m->set_vtable_index(index); 2994 } 2995 } 2996 // Sort method array by ascending method name (for faster lookups & vtable construction) 2997 // Note that the ordering is not alphabetical, see Symbol::fast_compare 2998 Method::sort_methods(methods); 2999 3000 intArray* method_ordering = NULL; 3001 // If JVMTI original method ordering or sharing is enabled construct int 3002 // array remembering the original ordering 3003 if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { 3004 method_ordering = new intArray(length, length, -1); 3005 for (int index = 0; index < length; index++) { 3006 Method* const m = methods->at(index); 3007 const int old_index = m->vtable_index(); 3008 assert(old_index >= 0 && old_index < length, "invalid method index"); 3009 method_ordering->at_put(index, old_index); 3010 m->set_vtable_index(Method::invalid_vtable_index); 3011 } 3012 } 3013 return method_ordering; 3014 } 3015 3016 // Parse generic_signature attribute for methods and fields 3017 u2 ClassFileParser::parse_generic_signature_attribute(const ClassFileStream* const cfs, 3018 TRAPS) { 3019 assert(cfs != NULL, "invariant"); 3020 3021 cfs->guarantee_more(2, CHECK_0); // generic_signature_index 3022 const u2 generic_signature_index = cfs->get_u2_fast(); 3023 check_property( 3024 valid_symbol_at(generic_signature_index), 3025 "Invalid Signature attribute at constant pool index %u in class file %s", 3026 generic_signature_index, CHECK_0); 3027 return generic_signature_index; 3028 } 3029 3030 void ClassFileParser::parse_classfile_sourcefile_attribute(const ClassFileStream* const cfs, 3031 TRAPS) { 3032 3033 assert(cfs != NULL, "invariant"); 3034 3035 cfs->guarantee_more(2, CHECK); // sourcefile_index 3036 const u2 sourcefile_index = cfs->get_u2_fast(); 3037 check_property( 3038 valid_symbol_at(sourcefile_index), 3039 "Invalid SourceFile attribute at constant pool index %u in class file %s", 3040 sourcefile_index, CHECK); 3041 set_class_sourcefile_index(sourcefile_index); 3042 } 3043 3044 void ClassFileParser::parse_classfile_source_debug_extension_attribute(const ClassFileStream* const cfs, 3045 int length, 3046 TRAPS) { 3047 assert(cfs != NULL, "invariant"); 3048 3049 const u1* const sde_buffer = cfs->get_u1_buffer(); 3050 assert(sde_buffer != NULL, "null sde buffer"); 3051 3052 // Don't bother storing it if there is no way to retrieve it 3053 if (JvmtiExport::can_get_source_debug_extension()) { 3054 assert((length+1) > length, "Overflow checking"); 3055 u1* const sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); 3056 for (int i = 0; i < length; i++) { 3057 sde[i] = sde_buffer[i]; 3058 } 3059 sde[length] = '\0'; 3060 set_class_sde_buffer((const char*)sde, length); 3061 } 3062 // Got utf8 string, set stream position forward 3063 cfs->skip_u1(length, CHECK); 3064 } 3065 3066 3067 // Inner classes can be static, private or protected (classic VM does this) 3068 #define RECOGNIZED_INNER_CLASS_MODIFIERS ( JVM_RECOGNIZED_CLASS_MODIFIERS | \ 3069 JVM_ACC_PRIVATE | \ 3070 JVM_ACC_PROTECTED | \ 3071 JVM_ACC_STATIC \ 3072 ) 3073 3074 // Return number of classes in the inner classes attribute table 3075 u2 ClassFileParser::parse_classfile_inner_classes_attribute(const ClassFileStream* const cfs, 3076 const u1* const inner_classes_attribute_start, 3077 bool parsed_enclosingmethod_attribute, 3078 u2 enclosing_method_class_index, 3079 u2 enclosing_method_method_index, 3080 TRAPS) { 3081 const u1* const current_mark = cfs->current(); 3082 u2 length = 0; 3083 if (inner_classes_attribute_start != NULL) { 3084 cfs->set_current(inner_classes_attribute_start); 3085 cfs->guarantee_more(2, CHECK_0); // length 3086 length = cfs->get_u2_fast(); 3087 } 3088 3089 // 4-tuples of shorts of inner classes data and 2 shorts of enclosing 3090 // method data: 3091 // [inner_class_info_index, 3092 // outer_class_info_index, 3093 // inner_name_index, 3094 // inner_class_access_flags, 3095 // ... 3096 // enclosing_method_class_index, 3097 // enclosing_method_method_index] 3098 const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); 3099 Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0); 3100 _inner_classes = inner_classes; 3101 3102 int index = 0; 3103 const int cp_size = _cp->length(); 3104 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 3105 for (int n = 0; n < length; n++) { 3106 // Inner class index 3107 const u2 inner_class_info_index = cfs->get_u2_fast(); 3108 check_property( 3109 valid_klass_reference_at(inner_class_info_index), 3110 "inner_class_info_index %u has bad constant type in class file %s", 3111 inner_class_info_index, CHECK_0); 3112 // Outer class index 3113 const u2 outer_class_info_index = cfs->get_u2_fast(); 3114 check_property( 3115 outer_class_info_index == 0 || 3116 valid_klass_reference_at(outer_class_info_index), 3117 "outer_class_info_index %u has bad constant type in class file %s", 3118 outer_class_info_index, CHECK_0); 3119 // Inner class name 3120 const u2 inner_name_index = cfs->get_u2_fast(); 3121 check_property( 3122 inner_name_index == 0 || valid_symbol_at(inner_name_index), 3123 "inner_name_index %u has bad constant type in class file %s", 3124 inner_name_index, CHECK_0); 3125 if (_need_verify) { 3126 guarantee_property(inner_class_info_index != outer_class_info_index, 3127 "Class is both outer and inner class in class file %s", CHECK_0); 3128 } 3129 // Access flags 3130 jint flags; 3131 // JVM_ACC_MODULE is defined in JDK-9 and later. 3132 if (_major_version >= JAVA_9_VERSION) { 3133 flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE); 3134 } else { 3135 flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; 3136 } 3137 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 3138 // Set abstract bit for old class files for backward compatibility 3139 flags |= JVM_ACC_ABSTRACT; 3140 } 3141 verify_legal_class_modifiers(flags, CHECK_0); 3142 AccessFlags inner_access_flags(flags); 3143 3144 inner_classes->at_put(index++, inner_class_info_index); 3145 inner_classes->at_put(index++, outer_class_info_index); 3146 inner_classes->at_put(index++, inner_name_index); 3147 inner_classes->at_put(index++, inner_access_flags.as_short()); 3148 } 3149 3150 // 4347400: make sure there's no duplicate entry in the classes array 3151 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { 3152 for(int i = 0; i < length * 4; i += 4) { 3153 for(int j = i + 4; j < length * 4; j += 4) { 3154 guarantee_property((inner_classes->at(i) != inner_classes->at(j) || 3155 inner_classes->at(i+1) != inner_classes->at(j+1) || 3156 inner_classes->at(i+2) != inner_classes->at(j+2) || 3157 inner_classes->at(i+3) != inner_classes->at(j+3)), 3158 "Duplicate entry in InnerClasses in class file %s", 3159 CHECK_0); 3160 } 3161 } 3162 } 3163 3164 // Set EnclosingMethod class and method indexes. 3165 if (parsed_enclosingmethod_attribute) { 3166 inner_classes->at_put(index++, enclosing_method_class_index); 3167 inner_classes->at_put(index++, enclosing_method_method_index); 3168 } 3169 assert(index == size, "wrong size"); 3170 3171 // Restore buffer's current position. 3172 cfs->set_current(current_mark); 3173 3174 return length; 3175 } 3176 3177 void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { 3178 set_class_synthetic_flag(true); 3179 } 3180 3181 void ClassFileParser::parse_classfile_signature_attribute(const ClassFileStream* const cfs, TRAPS) { 3182 assert(cfs != NULL, "invariant"); 3183 3184 const u2 signature_index = cfs->get_u2(CHECK); 3185 check_property( 3186 valid_symbol_at(signature_index), 3187 "Invalid constant pool index %u in Signature attribute in class file %s", 3188 signature_index, CHECK); 3189 set_class_generic_signature_index(signature_index); 3190 } 3191 3192 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(const ClassFileStream* const cfs, 3193 ConstantPool* cp, 3194 u4 attribute_byte_length, 3195 TRAPS) { 3196 assert(cfs != NULL, "invariant"); 3197 assert(cp != NULL, "invariant"); 3198 3199 const u1* const current_start = cfs->current(); 3200 3201 guarantee_property(attribute_byte_length >= sizeof(u2), 3202 "Invalid BootstrapMethods attribute length %u in class file %s", 3203 attribute_byte_length, 3204 CHECK); 3205 3206 cfs->guarantee_more(attribute_byte_length, CHECK); 3207 3208 const int attribute_array_length = cfs->get_u2_fast(); 3209 3210 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, 3211 "Short length on BootstrapMethods in class file %s", 3212 CHECK); 3213 3214 3215 // The attribute contains a counted array of counted tuples of shorts, 3216 // represending bootstrap specifiers: 3217 // length*{bootstrap_method_index, argument_count*{argument_index}} 3218 const int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); 3219 // operand_count = number of shorts in attr, except for leading length 3220 3221 // The attribute is copied into a short[] array. 3222 // The array begins with a series of short[2] pairs, one for each tuple. 3223 const int index_size = (attribute_array_length * 2); 3224 3225 Array<u2>* const operands = 3226 MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK); 3227 3228 // Eagerly assign operands so they will be deallocated with the constant 3229 // pool if there is an error. 3230 cp->set_operands(operands); 3231 3232 int operand_fill_index = index_size; 3233 const int cp_size = cp->length(); 3234 3235 for (int n = 0; n < attribute_array_length; n++) { 3236 // Store a 32-bit offset into the header of the operand array. 3237 ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); 3238 3239 // Read a bootstrap specifier. 3240 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc 3241 const u2 bootstrap_method_index = cfs->get_u2_fast(); 3242 const u2 argument_count = cfs->get_u2_fast(); 3243 check_property( 3244 valid_cp_range(bootstrap_method_index, cp_size) && 3245 cp->tag_at(bootstrap_method_index).is_method_handle(), 3246 "bootstrap_method_index %u has bad constant type in class file %s", 3247 bootstrap_method_index, 3248 CHECK); 3249 3250 guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), 3251 "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", 3252 CHECK); 3253 3254 operands->at_put(operand_fill_index++, bootstrap_method_index); 3255 operands->at_put(operand_fill_index++, argument_count); 3256 3257 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] 3258 for (int j = 0; j < argument_count; j++) { 3259 const u2 argument_index = cfs->get_u2_fast(); 3260 check_property( 3261 valid_cp_range(argument_index, cp_size) && 3262 cp->tag_at(argument_index).is_loadable_constant(), 3263 "argument_index %u has bad constant type in class file %s", 3264 argument_index, 3265 CHECK); 3266 operands->at_put(operand_fill_index++, argument_index); 3267 } 3268 } 3269 guarantee_property(current_start + attribute_byte_length == cfs->current(), 3270 "Bad length on BootstrapMethods in class file %s", 3271 CHECK); 3272 } 3273 3274 void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs, 3275 ConstantPool* cp, 3276 ClassFileParser::ClassAnnotationCollector* parsed_annotations, 3277 TRAPS) { 3278 assert(cfs != NULL, "invariant"); 3279 assert(cp != NULL, "invariant"); 3280 assert(parsed_annotations != NULL, "invariant"); 3281 3282 // Set inner classes attribute to default sentinel 3283 _inner_classes = Universe::the_empty_short_array(); 3284 cfs->guarantee_more(2, CHECK); // attributes_count 3285 u2 attributes_count = cfs->get_u2_fast(); 3286 bool parsed_sourcefile_attribute = false; 3287 bool parsed_innerclasses_attribute = false; 3288 bool parsed_enclosingmethod_attribute = false; 3289 bool parsed_bootstrap_methods_attribute = false; 3290 const u1* runtime_visible_annotations = NULL; 3291 int runtime_visible_annotations_length = 0; 3292 const u1* runtime_invisible_annotations = NULL; 3293 int runtime_invisible_annotations_length = 0; 3294 const u1* runtime_visible_type_annotations = NULL; 3295 int runtime_visible_type_annotations_length = 0; 3296 const u1* runtime_invisible_type_annotations = NULL; 3297 int runtime_invisible_type_annotations_length = 0; 3298 bool runtime_invisible_type_annotations_exists = false; 3299 bool runtime_invisible_annotations_exists = false; 3300 bool parsed_source_debug_ext_annotations_exist = false; 3301 const u1* inner_classes_attribute_start = NULL; 3302 u4 inner_classes_attribute_length = 0; 3303 u2 enclosing_method_class_index = 0; 3304 u2 enclosing_method_method_index = 0; 3305 // Iterate over attributes 3306 while (attributes_count--) { 3307 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length 3308 const u2 attribute_name_index = cfs->get_u2_fast(); 3309 const u4 attribute_length = cfs->get_u4_fast(); 3310 check_property( 3311 valid_symbol_at(attribute_name_index), 3312 "Attribute name has bad constant pool index %u in class file %s", 3313 attribute_name_index, CHECK); 3314 const Symbol* const tag = cp->symbol_at(attribute_name_index); 3315 if (tag == vmSymbols::tag_source_file()) { 3316 // Check for SourceFile tag 3317 if (_need_verify) { 3318 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); 3319 } 3320 if (parsed_sourcefile_attribute) { 3321 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); 3322 } else { 3323 parsed_sourcefile_attribute = true; 3324 } 3325 parse_classfile_sourcefile_attribute(cfs, CHECK); 3326 } else if (tag == vmSymbols::tag_source_debug_extension()) { 3327 // Check for SourceDebugExtension tag 3328 if (parsed_source_debug_ext_annotations_exist) { 3329 classfile_parse_error( 3330 "Multiple SourceDebugExtension attributes in class file %s", CHECK); 3331 } 3332 parsed_source_debug_ext_annotations_exist = true; 3333 parse_classfile_source_debug_extension_attribute(cfs, (int)attribute_length, CHECK); 3334 } else if (tag == vmSymbols::tag_inner_classes()) { 3335 // Check for InnerClasses tag 3336 if (parsed_innerclasses_attribute) { 3337 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); 3338 } else { 3339 parsed_innerclasses_attribute = true; 3340 } 3341 inner_classes_attribute_start = cfs->get_u1_buffer(); 3342 inner_classes_attribute_length = attribute_length; 3343 cfs->skip_u1(inner_classes_attribute_length, CHECK); 3344 } else if (tag == vmSymbols::tag_synthetic()) { 3345 // Check for Synthetic tag 3346 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec 3347 if (attribute_length != 0) { 3348 classfile_parse_error( 3349 "Invalid Synthetic classfile attribute length %u in class file %s", 3350 attribute_length, CHECK); 3351 } 3352 parse_classfile_synthetic_attribute(CHECK); 3353 } else if (tag == vmSymbols::tag_deprecated()) { 3354 // Check for Deprecatd tag - 4276120 3355 if (attribute_length != 0) { 3356 classfile_parse_error( 3357 "Invalid Deprecated classfile attribute length %u in class file %s", 3358 attribute_length, CHECK); 3359 } 3360 } else if (_major_version >= JAVA_1_5_VERSION) { 3361 if (tag == vmSymbols::tag_signature()) { 3362 if (_generic_signature_index != 0) { 3363 classfile_parse_error( 3364 "Multiple Signature attributes in class file %s", CHECK); 3365 } 3366 if (attribute_length != 2) { 3367 classfile_parse_error( 3368 "Wrong Signature attribute length %u in class file %s", 3369 attribute_length, CHECK); 3370 } 3371 parse_classfile_signature_attribute(cfs, CHECK); 3372 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { 3373 if (runtime_visible_annotations != NULL) { 3374 classfile_parse_error( 3375 "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); 3376 } 3377 runtime_visible_annotations_length = attribute_length; 3378 runtime_visible_annotations = cfs->get_u1_buffer(); 3379 assert(runtime_visible_annotations != NULL, "null visible annotations"); 3380 cfs->guarantee_more(runtime_visible_annotations_length, CHECK); 3381 parse_annotations(cp, 3382 runtime_visible_annotations, 3383 runtime_visible_annotations_length, 3384 parsed_annotations, 3385 _loader_data, 3386 CHECK); 3387 cfs->skip_u1_fast(runtime_visible_annotations_length); 3388 } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { 3389 if (runtime_invisible_annotations_exists) { 3390 classfile_parse_error( 3391 "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); 3392 } 3393 runtime_invisible_annotations_exists = true; 3394 if (PreserveAllAnnotations) { 3395 runtime_invisible_annotations_length = attribute_length; 3396 runtime_invisible_annotations = cfs->get_u1_buffer(); 3397 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 3398 } 3399 cfs->skip_u1(attribute_length, CHECK); 3400 } else if (tag == vmSymbols::tag_enclosing_method()) { 3401 if (parsed_enclosingmethod_attribute) { 3402 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); 3403 } else { 3404 parsed_enclosingmethod_attribute = true; 3405 } 3406 guarantee_property(attribute_length == 4, 3407 "Wrong EnclosingMethod attribute length %u in class file %s", 3408 attribute_length, CHECK); 3409 cfs->guarantee_more(4, CHECK); // class_index, method_index 3410 enclosing_method_class_index = cfs->get_u2_fast(); 3411 enclosing_method_method_index = cfs->get_u2_fast(); 3412 if (enclosing_method_class_index == 0) { 3413 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); 3414 } 3415 // Validate the constant pool indices and types 3416 check_property(valid_klass_reference_at(enclosing_method_class_index), 3417 "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); 3418 if (enclosing_method_method_index != 0 && 3419 (!cp->is_within_bounds(enclosing_method_method_index) || 3420 !cp->tag_at(enclosing_method_method_index).is_name_and_type())) { 3421 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); 3422 } 3423 } else if (tag == vmSymbols::tag_bootstrap_methods() && 3424 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { 3425 if (parsed_bootstrap_methods_attribute) { 3426 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); 3427 } 3428 parsed_bootstrap_methods_attribute = true; 3429 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3430 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3431 if (runtime_visible_type_annotations != NULL) { 3432 classfile_parse_error( 3433 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3434 } 3435 runtime_visible_type_annotations_length = attribute_length; 3436 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3437 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3438 // No need for the VM to parse Type annotations 3439 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3440 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3441 if (runtime_invisible_type_annotations_exists) { 3442 classfile_parse_error( 3443 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3444 } else { 3445 runtime_invisible_type_annotations_exists = true; 3446 } 3447 if (PreserveAllAnnotations) { 3448 runtime_invisible_type_annotations_length = attribute_length; 3449 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3450 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3451 } 3452 cfs->skip_u1(attribute_length, CHECK); 3453 } else { 3454 // Unknown attribute 3455 cfs->skip_u1(attribute_length, CHECK); 3456 } 3457 } else { 3458 // Unknown attribute 3459 cfs->skip_u1(attribute_length, CHECK); 3460 } 3461 } 3462 _annotations = assemble_annotations(runtime_visible_annotations, 3463 runtime_visible_annotations_length, 3464 runtime_invisible_annotations, 3465 runtime_invisible_annotations_length, 3466 CHECK); 3467 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3468 runtime_visible_type_annotations_length, 3469 runtime_invisible_type_annotations, 3470 runtime_invisible_type_annotations_length, 3471 CHECK); 3472 3473 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3474 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3475 cfs, 3476 inner_classes_attribute_start, 3477 parsed_innerclasses_attribute, 3478 enclosing_method_class_index, 3479 enclosing_method_method_index, 3480 CHECK); 3481 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3482 guarantee_property( 3483 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3484 "Wrong InnerClasses attribute length in class file %s", CHECK); 3485 } 3486 } 3487 3488 if (_max_bootstrap_specifier_index >= 0) { 3489 guarantee_property(parsed_bootstrap_methods_attribute, 3490 "Missing BootstrapMethods attribute in class file %s", CHECK); 3491 } 3492 } 3493 3494 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3495 assert(k != NULL, "invariant"); 3496 3497 if (_synthetic_flag) 3498 k->set_is_synthetic(); 3499 if (_sourcefile_index != 0) { 3500 k->set_source_file_name_index(_sourcefile_index); 3501 } 3502 if (_generic_signature_index != 0) { 3503 k->set_generic_signature_index(_generic_signature_index); 3504 } 3505 if (_sde_buffer != NULL) { 3506 k->set_source_debug_extension(_sde_buffer, _sde_length); 3507 } 3508 } 3509 3510 // Create the Annotations object that will 3511 // hold the annotations array for the Klass. 3512 void ClassFileParser::create_combined_annotations(TRAPS) { 3513 if (_annotations == NULL && 3514 _type_annotations == NULL && 3515 _fields_annotations == NULL && 3516 _fields_type_annotations == NULL) { 3517 // Don't create the Annotations object unnecessarily. 3518 return; 3519 } 3520 3521 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3522 annotations->set_class_annotations(_annotations); 3523 annotations->set_class_type_annotations(_type_annotations); 3524 annotations->set_fields_annotations(_fields_annotations); 3525 annotations->set_fields_type_annotations(_fields_type_annotations); 3526 3527 // This is the Annotations object that will be 3528 // assigned to InstanceKlass being constructed. 3529 _combined_annotations = annotations; 3530 3531 // The annotations arrays below has been transfered the 3532 // _combined_annotations so these fields can now be cleared. 3533 _annotations = NULL; 3534 _type_annotations = NULL; 3535 _fields_annotations = NULL; 3536 _fields_type_annotations = NULL; 3537 } 3538 3539 // Transfer ownership of metadata allocated to the InstanceKlass. 3540 void ClassFileParser::apply_parsed_class_metadata( 3541 InstanceKlass* this_klass, 3542 int java_fields_count, TRAPS) { 3543 assert(this_klass != NULL, "invariant"); 3544 3545 _cp->set_pool_holder(this_klass); 3546 this_klass->set_constants(_cp); 3547 this_klass->set_fields(_fields, java_fields_count); 3548 this_klass->set_methods(_methods); 3549 this_klass->set_inner_classes(_inner_classes); 3550 this_klass->set_local_interfaces(_local_interfaces); 3551 this_klass->set_transitive_interfaces(_transitive_interfaces); 3552 this_klass->set_annotations(_combined_annotations); 3553 3554 // Clear out these fields so they don't get deallocated by the destructor 3555 clear_class_metadata(); 3556 } 3557 3558 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3559 int runtime_visible_annotations_length, 3560 const u1* const runtime_invisible_annotations, 3561 int runtime_invisible_annotations_length, 3562 TRAPS) { 3563 AnnotationArray* annotations = NULL; 3564 if (runtime_visible_annotations != NULL || 3565 runtime_invisible_annotations != NULL) { 3566 annotations = MetadataFactory::new_array<u1>(_loader_data, 3567 runtime_visible_annotations_length + 3568 runtime_invisible_annotations_length, 3569 CHECK_(annotations)); 3570 if (runtime_visible_annotations != NULL) { 3571 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3572 annotations->at_put(i, runtime_visible_annotations[i]); 3573 } 3574 } 3575 if (runtime_invisible_annotations != NULL) { 3576 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3577 int append = runtime_visible_annotations_length+i; 3578 annotations->at_put(append, runtime_invisible_annotations[i]); 3579 } 3580 } 3581 } 3582 return annotations; 3583 } 3584 3585 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3586 const int super_class_index, 3587 const bool need_verify, 3588 TRAPS) { 3589 assert(cp != NULL, "invariant"); 3590 const InstanceKlass* super_klass = NULL; 3591 3592 if (super_class_index == 0) { 3593 check_property(_class_name == vmSymbols::java_lang_Object() 3594 || (_access_flags.get_flags() & JVM_ACC_VALUE), 3595 "Invalid superclass index %u in class file %s", 3596 super_class_index, 3597 CHECK_NULL); 3598 } else { 3599 check_property(valid_klass_reference_at(super_class_index), 3600 "Invalid superclass index %u in class file %s", 3601 super_class_index, 3602 CHECK_NULL); 3603 // The class name should be legal because it is checked when parsing constant pool. 3604 // However, make sure it is not an array type. 3605 bool is_array = false; 3606 if (cp->tag_at(super_class_index).is_klass()) { 3607 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3608 if (need_verify) 3609 is_array = super_klass->is_array_klass(); 3610 } else if (need_verify) { 3611 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3612 } 3613 if (need_verify) { 3614 guarantee_property(!is_array, 3615 "Bad superclass name in class file %s", CHECK_NULL); 3616 } 3617 } 3618 return super_klass; 3619 } 3620 3621 #ifndef PRODUCT 3622 static void print_field_layout(const Symbol* name, 3623 Array<u2>* fields, 3624 constantPoolHandle cp, 3625 int instance_size, 3626 int instance_fields_start, 3627 int instance_fields_end, 3628 int static_fields_end) { 3629 3630 assert(name != NULL, "invariant"); 3631 3632 tty->print("%s: field layout\n", name->as_klass_external_name()); 3633 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3634 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3635 if (!fs.access_flags().is_static()) { 3636 tty->print(" @%3d \"%s\" %s\n", 3637 fs.offset(), 3638 fs.name()->as_klass_external_name(), 3639 fs.signature()->as_klass_external_name()); 3640 } 3641 } 3642 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3643 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3644 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3645 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3646 if (fs.access_flags().is_static()) { 3647 tty->print(" @%3d \"%s\" %s\n", 3648 fs.offset(), 3649 fs.name()->as_klass_external_name(), 3650 fs.signature()->as_klass_external_name()); 3651 } 3652 } 3653 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3654 tty->print("\n"); 3655 } 3656 #endif 3657 3658 // Values needed for oopmap and InstanceKlass creation 3659 class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3660 public: 3661 OopMapBlocksBuilder* oop_map_blocks; 3662 int instance_size; 3663 int nonstatic_field_size; 3664 int static_field_size; 3665 bool has_nonstatic_fields; 3666 }; 3667 3668 // Utility to collect and compact oop maps during layout 3669 class ClassFileParser::OopMapBlocksBuilder : public ResourceObj { 3670 public: 3671 OopMapBlock* nonstatic_oop_maps; 3672 unsigned int nonstatic_oop_map_count; 3673 unsigned int max_nonstatic_oop_maps; 3674 3675 public: 3676 OopMapBlocksBuilder(unsigned int max_blocks, TRAPS) { 3677 max_nonstatic_oop_maps = max_blocks; 3678 nonstatic_oop_map_count = 0; 3679 if (max_blocks == 0) { 3680 nonstatic_oop_maps = NULL; 3681 } else { 3682 nonstatic_oop_maps = NEW_RESOURCE_ARRAY_IN_THREAD( 3683 THREAD, OopMapBlock, max_nonstatic_oop_maps); 3684 memset(nonstatic_oop_maps, 0, sizeof(OopMapBlock) * max_blocks); 3685 } 3686 } 3687 3688 OopMapBlock* last_oop_map() const { 3689 assert(nonstatic_oop_map_count > 0, "Has no oop maps"); 3690 return nonstatic_oop_maps + (nonstatic_oop_map_count - 1); 3691 } 3692 3693 // addition of super oop maps 3694 void initialize_inherited_blocks(OopMapBlock* blocks, unsigned int nof_blocks) { 3695 assert(nof_blocks && nonstatic_oop_map_count == 0 && 3696 nof_blocks <= max_nonstatic_oop_maps, "invariant"); 3697 3698 memcpy(nonstatic_oop_maps, blocks, sizeof(OopMapBlock) * nof_blocks); 3699 nonstatic_oop_map_count += nof_blocks; 3700 } 3701 3702 // collection of oops 3703 void add(int offset, int count) { 3704 if (nonstatic_oop_map_count == 0) { 3705 nonstatic_oop_map_count++; 3706 } 3707 OopMapBlock* nonstatic_oop_map = last_oop_map(); 3708 if (nonstatic_oop_map->count() == 0) { // Unused map, set it up 3709 nonstatic_oop_map->set_offset(offset); 3710 nonstatic_oop_map->set_count(count); 3711 } else if (nonstatic_oop_map->is_contiguous(offset)) { // contiguous, add 3712 nonstatic_oop_map->increment_count(count); 3713 } else { // Need a new one... 3714 nonstatic_oop_map_count++; 3715 assert(nonstatic_oop_map_count <= max_nonstatic_oop_maps, "range check"); 3716 nonstatic_oop_map = last_oop_map(); 3717 nonstatic_oop_map->set_offset(offset); 3718 nonstatic_oop_map->set_count(count); 3719 } 3720 } 3721 3722 // general purpose copy, e.g. into allocated instanceKlass 3723 void copy(OopMapBlock* dst) { 3724 if (nonstatic_oop_map_count != 0) { 3725 memcpy(dst, nonstatic_oop_maps, sizeof(OopMapBlock) * nonstatic_oop_map_count); 3726 } 3727 } 3728 3729 // Sort and compact adjacent blocks 3730 void compact(TRAPS) { 3731 if (nonstatic_oop_map_count <= 1) { 3732 return; 3733 } 3734 /* 3735 * Since field layout sneeks in oops before values, we will be able to condense 3736 * blocks. There is potential to compact between super, own refs and values 3737 * containing refs. 3738 * 3739 * Currently compaction is slightly limited due to values being 8 byte aligned. 3740 * This may well change: FixMe if doesn't, the code below is fairly general purpose 3741 * and maybe it doesn't need to be. 3742 */ 3743 qsort(nonstatic_oop_maps, nonstatic_oop_map_count, sizeof(OopMapBlock), 3744 (_sort_Fn)OopMapBlock::compare_offset); 3745 if (nonstatic_oop_map_count < 2) { 3746 return; 3747 } 3748 3749 //Make a temp copy, and iterate through and copy back into the orig 3750 ResourceMark rm(THREAD); 3751 OopMapBlock* oop_maps_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, OopMapBlock, 3752 nonstatic_oop_map_count); 3753 OopMapBlock* oop_maps_copy_end = oop_maps_copy + nonstatic_oop_map_count; 3754 copy(oop_maps_copy); 3755 OopMapBlock* nonstatic_oop_map = nonstatic_oop_maps; 3756 unsigned int new_count = 1; 3757 oop_maps_copy++; 3758 while(oop_maps_copy < oop_maps_copy_end) { 3759 assert(nonstatic_oop_map->offset() < oop_maps_copy->offset(), "invariant"); 3760 if (nonstatic_oop_map->is_contiguous(oop_maps_copy->offset())) { 3761 nonstatic_oop_map->increment_count(oop_maps_copy->count()); 3762 } else { 3763 nonstatic_oop_map++; 3764 new_count++; 3765 nonstatic_oop_map->set_offset(oop_maps_copy->offset()); 3766 nonstatic_oop_map->set_count(oop_maps_copy->count()); 3767 } 3768 oop_maps_copy++; 3769 } 3770 assert(new_count <= nonstatic_oop_map_count, "end up with more maps after compact() ?"); 3771 nonstatic_oop_map_count = new_count; 3772 } 3773 3774 void print_on(outputStream* st) const { 3775 st->print_cr(" OopMapBlocks: %3d /%3d", nonstatic_oop_map_count, max_nonstatic_oop_maps); 3776 if (nonstatic_oop_map_count > 0) { 3777 OopMapBlock* map = nonstatic_oop_maps; 3778 OopMapBlock* last_map = last_oop_map(); 3779 assert(map <= last_map, "Last less than first"); 3780 while (map <= last_map) { 3781 st->print_cr(" Offset: %3d -%3d Count: %3d", map->offset(), 3782 map->offset() + map->offset_span() - heapOopSize, map->count()); 3783 map++; 3784 } 3785 } 3786 } 3787 3788 void print_value_on(outputStream* st) const { 3789 print_on(st); 3790 } 3791 3792 }; 3793 3794 void ClassFileParser::throwValueTypeLimitation(THREAD_AND_LOCATION_DECL, 3795 const char* msg, 3796 const Symbol* name, 3797 const Symbol* sig) const { 3798 3799 ResourceMark rm(THREAD); 3800 if (name == NULL || sig == NULL) { 3801 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS, 3802 vmSymbols::java_lang_ClassFormatError(), 3803 "class: %s - %s", _class_name->as_C_string(), msg); 3804 } 3805 else { 3806 Exceptions::fthrow(THREAD_AND_LOCATION_ARGS, 3807 vmSymbols::java_lang_ClassFormatError(), 3808 "\"%s\" sig: \"%s\" class: %s - %s", name->as_C_string(), sig->as_C_string(), 3809 _class_name->as_C_string(), msg); 3810 } 3811 } 3812 3813 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3814 void ClassFileParser::layout_fields(ConstantPool* cp, 3815 const FieldAllocationCount* fac, 3816 const ClassAnnotationCollector* parsed_annotations, 3817 FieldLayoutInfo* info, 3818 TRAPS) { 3819 3820 assert(cp != NULL, "invariant"); 3821 3822 // Field size and offset computation 3823 int nonstatic_field_size = _super_klass == NULL ? 0 : 3824 _super_klass->nonstatic_field_size(); 3825 int next_nonstatic_valuetype_offset = 0; 3826 int first_nonstatic_valuetype_offset = 0; 3827 3828 // Fields that are value types are handled differently depending if they are static or not: 3829 // - static fields are oops 3830 // - non-static fields are embedded 3831 3832 // Count the contended fields by type. 3833 // 3834 // We ignore static fields, because @Contended is not supported for them. 3835 // The layout code below will also ignore the static fields. 3836 int nonstatic_contended_count = 0; 3837 FieldAllocationCount fac_contended; 3838 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3839 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3840 if (fs.is_contended()) { 3841 fac_contended.count[atype]++; 3842 if (!fs.access_flags().is_static()) { 3843 nonstatic_contended_count++; 3844 } 3845 } 3846 } 3847 3848 3849 // Calculate the starting byte offsets 3850 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3851 // Value types in static fields are nor embedded, they are handled with oops 3852 int next_static_double_offset = next_static_oop_offset + 3853 ((fac->count[STATIC_OOP] + fac->count[STATIC_VALUETYPE]) * heapOopSize); 3854 if ( fac->count[STATIC_DOUBLE] && 3855 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3856 Universe::field_type_should_be_aligned(T_LONG)) ) { 3857 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3858 } 3859 3860 int next_static_word_offset = next_static_double_offset + 3861 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3862 int next_static_short_offset = next_static_word_offset + 3863 ((fac->count[STATIC_WORD]) * BytesPerInt); 3864 int next_static_byte_offset = next_static_short_offset + 3865 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3866 3867 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3868 nonstatic_field_size * heapOopSize; 3869 3870 // First field of value types is aligned on a long boundary in order to ease 3871 // in-lining of value types (with header removal) in packed arrays and 3872 // flatten value types 3873 int initial_value_type_padding = 0; 3874 if (is_value_type() || is_derive_value_type()) { 3875 int old = nonstatic_fields_start; 3876 nonstatic_fields_start = align_size_up(nonstatic_fields_start, BytesPerLong); 3877 initial_value_type_padding = nonstatic_fields_start - old; 3878 } 3879 3880 int next_nonstatic_field_offset = nonstatic_fields_start; 3881 3882 const bool is_contended_class = parsed_annotations->is_contended(); 3883 3884 // Class is contended, pad before all the fields 3885 if (is_contended_class) { 3886 next_nonstatic_field_offset += ContendedPaddingWidth; 3887 } 3888 3889 // Temporary value types restrictions 3890 if (is_value_type() || is_derive_value_type()) { 3891 if (is_contended_class) { 3892 throwValueTypeLimitation(THREAD_AND_LOCATION, "Value Types do not support @Contended annotation yet"); 3893 return; 3894 } 3895 } 3896 3897 // Compute the non-contended fields count. 3898 // The packing code below relies on these counts to determine if some field 3899 // can be squeezed into the alignment gap. Contended fields are obviously 3900 // exempt from that. 3901 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3902 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3903 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3904 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3905 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3906 3907 int static_value_type_count = 0; 3908 int nonstatic_value_type_count = 0; 3909 int* nonstatic_value_type_indexes = NULL; 3910 Klass** nonstatic_value_type_klasses = NULL; 3911 unsigned int value_type_oop_map_count = 0; 3912 3913 int max_nonstatic_value_type = fac->count[NONSTATIC_VALUETYPE] + 1; 3914 3915 nonstatic_value_type_indexes = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, int, 3916 max_nonstatic_value_type); 3917 for (int i = 0; i < max_nonstatic_value_type; i++) { 3918 nonstatic_value_type_indexes[i] = -1; 3919 } 3920 nonstatic_value_type_klasses = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, Klass*, 3921 max_nonstatic_value_type); 3922 3923 for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) { 3924 if (fs.allocation_type() == STATIC_VALUETYPE) { 3925 static_value_type_count++; 3926 } else if (fs.allocation_type() == NONSTATIC_VALUETYPE) { 3927 Symbol* signature = fs.signature(); 3928 Klass* klass = SystemDictionary::resolve_or_fail(signature, 3929 Handle(THREAD, _loader_data->class_loader()), 3930 _protection_domain, true, CHECK); 3931 assert(klass != NULL, "Sanity check"); 3932 assert(klass->access_flags().is_value_type(), "Value type expected"); 3933 nonstatic_value_type_indexes[nonstatic_value_type_count] = fs.index(); 3934 nonstatic_value_type_klasses[nonstatic_value_type_count] = klass; 3935 nonstatic_value_type_count++; 3936 3937 ValueKlass* vklass = ValueKlass::cast(klass); 3938 if (vklass->contains_oops()) { 3939 value_type_oop_map_count += vklass->nonstatic_oop_map_count(); 3940 } 3941 } 3942 } 3943 3944 // Total non-static fields count, including every contended field 3945 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3946 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3947 fac->count[NONSTATIC_OOP] + fac->count[NONSTATIC_VALUETYPE]; 3948 3949 const bool super_has_nonstatic_fields = 3950 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3951 const bool has_nonstatic_fields = 3952 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3953 const bool has_nonstatic_value_fields = nonstatic_value_type_count > 0; 3954 3955 // Prepare list of oops for oop map generation. 3956 // 3957 // "offset" and "count" lists are describing the set of contiguous oop 3958 // regions. offset[i] is the start of the i-th region, which then has 3959 // count[i] oops following. Before we know how many regions are required, 3960 // we pessimistically allocate the maps to fit all the oops into the 3961 // distinct regions. 3962 // 3963 int super_oop_map_count = (_super_klass == NULL) ? 0 :_super_klass->nonstatic_oop_map_count(); 3964 int max_oop_map_count = 3965 super_oop_map_count + 3966 fac->count[NONSTATIC_OOP] + 3967 value_type_oop_map_count; 3968 3969 OopMapBlocksBuilder* nonstatic_oop_maps = new OopMapBlocksBuilder(max_oop_map_count, THREAD); 3970 if (super_oop_map_count > 0) { 3971 nonstatic_oop_maps->initialize_inherited_blocks(_super_klass->start_of_nonstatic_oop_maps(), 3972 _super_klass->nonstatic_oop_map_count()); 3973 } 3974 3975 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3976 3977 bool compact_fields = CompactFields; 3978 int allocation_style = FieldsAllocationStyle; 3979 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3980 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3981 allocation_style = 1; // Optimistic 3982 } 3983 3984 // The next classes have predefined hard-coded fields offsets 3985 // (see in JavaClasses::compute_hard_coded_offsets()). 3986 // Use default fields allocation order for them. 3987 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3988 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3989 _class_name == vmSymbols::java_lang_Class() || 3990 _class_name == vmSymbols::java_lang_ClassLoader() || 3991 _class_name == vmSymbols::java_lang_ref_Reference() || 3992 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3993 _class_name == vmSymbols::java_lang_StackTraceElement() || 3994 _class_name == vmSymbols::java_lang_String() || 3995 _class_name == vmSymbols::java_lang_Throwable() || 3996 _class_name == vmSymbols::java_lang_Boolean() || 3997 _class_name == vmSymbols::java_lang_Character() || 3998 _class_name == vmSymbols::java_lang_Float() || 3999 _class_name == vmSymbols::java_lang_Double() || 4000 _class_name == vmSymbols::java_lang_Byte() || 4001 _class_name == vmSymbols::java_lang_Short() || 4002 _class_name == vmSymbols::java_lang_Integer() || 4003 _class_name == vmSymbols::java_lang_Long())) { 4004 allocation_style = 0; // Allocate oops first 4005 compact_fields = false; // Don't compact fields 4006 } 4007 4008 int next_nonstatic_oop_offset = 0; 4009 int next_nonstatic_double_offset = 0; 4010 4011 // Rearrange fields for a given allocation style 4012 if( allocation_style == 0 ) { 4013 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 4014 next_nonstatic_oop_offset = next_nonstatic_field_offset; 4015 next_nonstatic_double_offset = next_nonstatic_oop_offset + 4016 (nonstatic_oop_count * heapOopSize); 4017 } else if( allocation_style == 1 ) { 4018 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 4019 next_nonstatic_double_offset = next_nonstatic_field_offset; 4020 } else if( allocation_style == 2 ) { 4021 // Fields allocation: oops fields in super and sub classes are together. 4022 if( nonstatic_field_size > 0 && super_oop_map_count > 0 ) { 4023 if (next_nonstatic_field_offset == nonstatic_oop_maps->last_oop_map()->end_offset()) { 4024 allocation_style = 0; // allocate oops first 4025 next_nonstatic_oop_offset = next_nonstatic_field_offset; 4026 next_nonstatic_double_offset = next_nonstatic_oop_offset + 4027 (nonstatic_oop_count * heapOopSize); 4028 } 4029 } 4030 if( allocation_style == 2 ) { 4031 allocation_style = 1; // allocate oops last 4032 next_nonstatic_double_offset = next_nonstatic_field_offset; 4033 } 4034 } else { 4035 ShouldNotReachHere(); 4036 } 4037 4038 int nonstatic_oop_space_count = 0; 4039 int nonstatic_word_space_count = 0; 4040 int nonstatic_short_space_count = 0; 4041 int nonstatic_byte_space_count = 0; 4042 int nonstatic_oop_space_offset = 0; 4043 int nonstatic_word_space_offset = 0; 4044 int nonstatic_short_space_offset = 0; 4045 int nonstatic_byte_space_offset = 0; 4046 4047 // Try to squeeze some of the fields into the gaps due to 4048 // long/double alignment. 4049 if (nonstatic_double_count > 0) { 4050 int offset = next_nonstatic_double_offset; 4051 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 4052 if (compact_fields && offset != next_nonstatic_double_offset) { 4053 // Allocate available fields into the gap before double field. 4054 int length = next_nonstatic_double_offset - offset; 4055 assert(length == BytesPerInt, ""); 4056 nonstatic_word_space_offset = offset; 4057 if (nonstatic_word_count > 0) { 4058 nonstatic_word_count -= 1; 4059 nonstatic_word_space_count = 1; // Only one will fit 4060 length -= BytesPerInt; 4061 offset += BytesPerInt; 4062 } 4063 nonstatic_short_space_offset = offset; 4064 while (length >= BytesPerShort && nonstatic_short_count > 0) { 4065 nonstatic_short_count -= 1; 4066 nonstatic_short_space_count += 1; 4067 length -= BytesPerShort; 4068 offset += BytesPerShort; 4069 } 4070 nonstatic_byte_space_offset = offset; 4071 while (length > 0 && nonstatic_byte_count > 0) { 4072 nonstatic_byte_count -= 1; 4073 nonstatic_byte_space_count += 1; 4074 length -= 1; 4075 } 4076 // Allocate oop field in the gap if there are no other fields for that. 4077 nonstatic_oop_space_offset = offset; 4078 if (length >= heapOopSize && nonstatic_oop_count > 0 && 4079 allocation_style != 0) { // when oop fields not first 4080 nonstatic_oop_count -= 1; 4081 nonstatic_oop_space_count = 1; // Only one will fit 4082 length -= heapOopSize; 4083 offset += heapOopSize; 4084 } 4085 } 4086 } 4087 4088 int next_nonstatic_word_offset = next_nonstatic_double_offset + 4089 (nonstatic_double_count * BytesPerLong); 4090 int next_nonstatic_short_offset = next_nonstatic_word_offset + 4091 (nonstatic_word_count * BytesPerInt); 4092 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 4093 (nonstatic_short_count * BytesPerShort); 4094 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 4095 nonstatic_byte_count; 4096 4097 // let oops jump before padding with this allocation style 4098 if( allocation_style == 1 ) { 4099 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 4100 if( nonstatic_oop_count > 0 ) { 4101 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 4102 } 4103 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 4104 } 4105 4106 // Aligning embedded value types 4107 // bug below, the current algorithm to layout embedded value types always put them at the 4108 // end of the layout, which doesn't match the different allocation policies the VM is 4109 // supposed to provide => FixMe 4110 // Note also that the current alignment policy is to make each value type starting on a 4111 // 64 bits boundary. This could be optimized later. For instance, it could be nice to 4112 // align value types according to their most constrained internal type. 4113 next_nonstatic_valuetype_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4114 int next_value_type_index = 0; 4115 4116 // Iterate over fields again and compute correct offsets. 4117 // The field allocation type was temporarily stored in the offset slot. 4118 // oop fields are located before non-oop fields (static and non-static). 4119 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 4120 4121 // skip already laid out fields 4122 if (fs.is_offset_set()) continue; 4123 4124 // contended instance fields are handled below 4125 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 4126 4127 int real_offset = 0; 4128 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 4129 4130 // pack the rest of the fields 4131 switch (atype) { 4132 // Value types in static fields are handled with oops 4133 case STATIC_VALUETYPE: // Fallthrough 4134 case STATIC_OOP: 4135 real_offset = next_static_oop_offset; 4136 next_static_oop_offset += heapOopSize; 4137 break; 4138 case STATIC_BYTE: 4139 real_offset = next_static_byte_offset; 4140 next_static_byte_offset += 1; 4141 break; 4142 case STATIC_SHORT: 4143 real_offset = next_static_short_offset; 4144 next_static_short_offset += BytesPerShort; 4145 break; 4146 case STATIC_WORD: 4147 real_offset = next_static_word_offset; 4148 next_static_word_offset += BytesPerInt; 4149 break; 4150 case STATIC_DOUBLE: 4151 real_offset = next_static_double_offset; 4152 next_static_double_offset += BytesPerLong; 4153 break; 4154 case NONSTATIC_VALUETYPE: 4155 { 4156 Klass* klass = nonstatic_value_type_klasses[next_value_type_index]; 4157 assert(klass != NULL, "Klass should have been loaded and resolved earlier"); 4158 assert(klass->access_flags().is_value_type(),"Must be a value type"); 4159 ValueKlass* vklass = ValueKlass::cast(klass); 4160 real_offset = next_nonstatic_valuetype_offset; 4161 next_nonstatic_valuetype_offset += (vklass->size_helper()) * wordSize - vklass->first_field_offset(); 4162 // aligning next value type on a 64 bits boundary 4163 next_nonstatic_valuetype_offset = align_size_up(next_nonstatic_valuetype_offset, BytesPerLong); 4164 next_value_type_index += 1; 4165 4166 if (vklass->contains_oops()) { // add flatten oop maps 4167 int diff = real_offset - vklass->first_field_offset(); 4168 const OopMapBlock* map = vklass->start_of_nonstatic_oop_maps(); 4169 const OopMapBlock* const last_map = map + vklass->nonstatic_oop_map_count(); 4170 while (map < last_map) { 4171 nonstatic_oop_maps->add(map->offset() + diff, map->count()); 4172 map++; 4173 } 4174 } 4175 } 4176 break; 4177 case NONSTATIC_OOP: 4178 if( nonstatic_oop_space_count > 0 ) { 4179 real_offset = nonstatic_oop_space_offset; 4180 nonstatic_oop_space_offset += heapOopSize; 4181 nonstatic_oop_space_count -= 1; 4182 } else { 4183 real_offset = next_nonstatic_oop_offset; 4184 next_nonstatic_oop_offset += heapOopSize; 4185 } 4186 nonstatic_oop_maps->add(real_offset, 1); 4187 break; 4188 case NONSTATIC_BYTE: 4189 if( nonstatic_byte_space_count > 0 ) { 4190 real_offset = nonstatic_byte_space_offset; 4191 nonstatic_byte_space_offset += 1; 4192 nonstatic_byte_space_count -= 1; 4193 } else { 4194 real_offset = next_nonstatic_byte_offset; 4195 next_nonstatic_byte_offset += 1; 4196 } 4197 break; 4198 case NONSTATIC_SHORT: 4199 if( nonstatic_short_space_count > 0 ) { 4200 real_offset = nonstatic_short_space_offset; 4201 nonstatic_short_space_offset += BytesPerShort; 4202 nonstatic_short_space_count -= 1; 4203 } else { 4204 real_offset = next_nonstatic_short_offset; 4205 next_nonstatic_short_offset += BytesPerShort; 4206 } 4207 break; 4208 case NONSTATIC_WORD: 4209 if( nonstatic_word_space_count > 0 ) { 4210 real_offset = nonstatic_word_space_offset; 4211 nonstatic_word_space_offset += BytesPerInt; 4212 nonstatic_word_space_count -= 1; 4213 } else { 4214 real_offset = next_nonstatic_word_offset; 4215 next_nonstatic_word_offset += BytesPerInt; 4216 } 4217 break; 4218 case NONSTATIC_DOUBLE: 4219 real_offset = next_nonstatic_double_offset; 4220 next_nonstatic_double_offset += BytesPerLong; 4221 break; 4222 default: 4223 ShouldNotReachHere(); 4224 } 4225 fs.set_offset(real_offset); 4226 } 4227 4228 4229 // Handle the contended cases. 4230 // 4231 // Each contended field should not intersect the cache line with another contended field. 4232 // In the absence of alignment information, we end up with pessimistically separating 4233 // the fields with full-width padding. 4234 // 4235 // Additionally, this should not break alignment for the fields, so we round the alignment up 4236 // for each field. 4237 if (nonstatic_contended_count > 0) { 4238 4239 // if there is at least one contended field, we need to have pre-padding for them 4240 next_nonstatic_padded_offset += ContendedPaddingWidth; 4241 4242 // collect all contended groups 4243 ResourceBitMap bm(cp->size()); 4244 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 4245 // skip already laid out fields 4246 if (fs.is_offset_set()) continue; 4247 4248 if (fs.is_contended()) { 4249 bm.set_bit(fs.contended_group()); 4250 } 4251 } 4252 4253 int current_group = -1; 4254 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 4255 4256 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 4257 4258 // skip already laid out fields 4259 if (fs.is_offset_set()) continue; 4260 4261 // skip non-contended fields and fields from different group 4262 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 4263 4264 // handle statics below 4265 if (fs.access_flags().is_static()) continue; 4266 4267 int real_offset = 0; 4268 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 4269 4270 switch (atype) { 4271 case NONSTATIC_BYTE: 4272 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 4273 real_offset = next_nonstatic_padded_offset; 4274 next_nonstatic_padded_offset += 1; 4275 break; 4276 4277 case NONSTATIC_SHORT: 4278 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4279 real_offset = next_nonstatic_padded_offset; 4280 next_nonstatic_padded_offset += BytesPerShort; 4281 break; 4282 4283 case NONSTATIC_WORD: 4284 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4285 real_offset = next_nonstatic_padded_offset; 4286 next_nonstatic_padded_offset += BytesPerInt; 4287 break; 4288 4289 case NONSTATIC_DOUBLE: 4290 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4291 real_offset = next_nonstatic_padded_offset; 4292 next_nonstatic_padded_offset += BytesPerLong; 4293 break; 4294 4295 // Value types in static fields are handled with oops 4296 case NONSTATIC_VALUETYPE: 4297 throwValueTypeLimitation(THREAD_AND_LOCATION, 4298 "@Contended annotation not supported for value types yet", fs.name(), fs.signature()); 4299 return; 4300 4301 case NONSTATIC_OOP: 4302 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4303 real_offset = next_nonstatic_padded_offset; 4304 next_nonstatic_padded_offset += heapOopSize; 4305 nonstatic_oop_maps->add(real_offset, 1); 4306 break; 4307 4308 default: 4309 ShouldNotReachHere(); 4310 } 4311 4312 if (fs.contended_group() == 0) { 4313 // Contended group defines the equivalence class over the fields: 4314 // the fields within the same contended group are not inter-padded. 4315 // The only exception is default group, which does not incur the 4316 // equivalence, and so requires intra-padding. 4317 next_nonstatic_padded_offset += ContendedPaddingWidth; 4318 } 4319 4320 fs.set_offset(real_offset); 4321 } // for 4322 4323 // Start laying out the next group. 4324 // Note that this will effectively pad the last group in the back; 4325 // this is expected to alleviate memory contention effects for 4326 // subclass fields and/or adjacent object. 4327 // If this was the default group, the padding is already in place. 4328 if (current_group != 0) { 4329 next_nonstatic_padded_offset += ContendedPaddingWidth; 4330 } 4331 } 4332 4333 // handle static fields 4334 } 4335 4336 // Entire class is contended, pad in the back. 4337 // This helps to alleviate memory contention effects for subclass fields 4338 // and/or adjacent object. 4339 if (is_contended_class) { 4340 assert(!is_value_type() && !is_derive_value_type(), "@Contended not supported for value types yet"); 4341 next_nonstatic_padded_offset += ContendedPaddingWidth; 4342 } 4343 4344 int notaligned_nonstatic_fields_end; 4345 if (nonstatic_value_type_count != 0) { 4346 notaligned_nonstatic_fields_end = next_nonstatic_valuetype_offset; 4347 } else { 4348 notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4349 } 4350 4351 int nonstatic_field_sz_align = heapOopSize; 4352 if (is_value_type() || is_derive_value_type()) { 4353 if ((notaligned_nonstatic_fields_end - nonstatic_fields_start) > heapOopSize) { 4354 nonstatic_field_sz_align = BytesPerLong; // value copy of fields only uses jlong copy 4355 } 4356 } 4357 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, nonstatic_field_sz_align); 4358 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4359 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4360 4361 int static_field_size = (static_fields_end - 4362 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4363 nonstatic_field_size = nonstatic_field_size + 4364 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4365 4366 int instance_size = align_object_size(instance_end / wordSize); 4367 4368 assert(instance_size == align_object_size(align_size_up( 4369 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize) 4370 + initial_value_type_padding, wordSize) / wordSize), "consistent layout helper value"); 4371 4372 4373 // Invariant: nonstatic_field end/start should only change if there are 4374 // nonstatic fields in the class, or if the class is contended. We compare 4375 // against the non-aligned value, so that end alignment will not fail the 4376 // assert without actually having the fields. 4377 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4378 is_contended_class || 4379 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4380 4381 // Number of non-static oop map blocks allocated at end of klass. 4382 nonstatic_oop_maps->compact(THREAD); 4383 4384 #ifndef PRODUCT 4385 if ((PrintFieldLayout && !is_value_type()) || 4386 (PrintValueLayout && (is_value_type() || has_nonstatic_value_fields))) { 4387 print_field_layout(_class_name, 4388 _fields, 4389 cp, 4390 instance_size, 4391 nonstatic_fields_start, 4392 nonstatic_fields_end, 4393 static_fields_end); 4394 nonstatic_oop_maps->print_on(tty); 4395 tty->print("\n"); 4396 } 4397 4398 #endif 4399 // Pass back information needed for InstanceKlass creation 4400 info->oop_map_blocks = nonstatic_oop_maps; 4401 info->instance_size = instance_size; 4402 info->static_field_size = static_field_size; 4403 info->nonstatic_field_size = nonstatic_field_size; 4404 info->has_nonstatic_fields = has_nonstatic_fields; 4405 } 4406 4407 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4408 assert(ik != NULL, "invariant"); 4409 4410 const Klass* const super = ik->super(); 4411 4412 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4413 // in which case we don't have to register objects as finalizable 4414 if (!_has_empty_finalizer) { 4415 if (_has_finalizer || 4416 (super != NULL && super->has_finalizer())) { 4417 ik->set_has_finalizer(); 4418 } 4419 } 4420 4421 #ifdef ASSERT 4422 bool f = false; 4423 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4424 vmSymbols::void_method_signature()); 4425 if (m != NULL && !m->is_empty_method()) { 4426 f = true; 4427 } 4428 4429 // Spec doesn't prevent agent from redefinition of empty finalizer. 4430 // Despite the fact that it's generally bad idea and redefined finalizer 4431 // will not work as expected we shouldn't abort vm in this case 4432 if (!ik->has_redefined_this_or_super()) { 4433 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4434 } 4435 #endif 4436 4437 // Check if this klass supports the java.lang.Cloneable interface 4438 if (SystemDictionary::Cloneable_klass_loaded()) { 4439 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4440 ik->set_is_cloneable(); 4441 } 4442 } 4443 4444 // Check if this klass has a vanilla default constructor 4445 if (super == NULL) { 4446 // java.lang.Object has empty default constructor 4447 ik->set_has_vanilla_constructor(); 4448 } else { 4449 if (super->has_vanilla_constructor() && 4450 _has_vanilla_constructor) { 4451 ik->set_has_vanilla_constructor(); 4452 } 4453 #ifdef ASSERT 4454 bool v = false; 4455 if (super->has_vanilla_constructor()) { 4456 const Method* const constructor = 4457 ik->find_method(vmSymbols::object_initializer_name(), 4458 vmSymbols::void_method_signature()); 4459 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4460 v = true; 4461 } 4462 } 4463 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4464 #endif 4465 } 4466 4467 // If it cannot be fast-path allocated, set a bit in the layout helper. 4468 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4469 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4470 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4471 || ik->is_abstract() || ik->is_interface() 4472 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4473 || ik->size_helper() >= FastAllocateSizeLimit) { 4474 // Forbid fast-path allocation. 4475 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4476 ik->set_layout_helper(lh); 4477 } 4478 } 4479 4480 // Attach super classes and interface classes to class loader data 4481 static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4482 TRAPS) { 4483 assert(defined_klass != NULL, "invariant"); 4484 4485 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4486 if (defining_loader_data->is_the_null_class_loader_data()) { 4487 // Dependencies to null class loader data are implicit. 4488 return; 4489 } else { 4490 // add super class dependency 4491 Klass* const super = defined_klass->super(); 4492 if (super != NULL) { 4493 defining_loader_data->record_dependency(super, CHECK); 4494 } 4495 4496 // add super interface dependencies 4497 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4498 if (local_interfaces != NULL) { 4499 const int length = local_interfaces->length(); 4500 for (int i = 0; i < length; i++) { 4501 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4502 } 4503 } 4504 4505 for (FieldStream st((InstanceKlass*)defined_klass, false, false); !st.eos(); st.next()) { 4506 Symbol* signature = st.signature(); 4507 if (signature->starts_with("Q")) { 4508 Klass* klass = SystemDictionary::resolve_or_fail(signature, 4509 Handle(THREAD, defined_klass->class_loader()), 4510 Handle(THREAD, defined_klass->protection_domain()), true, CHECK); 4511 assert(klass != NULL, "Sanity check"); 4512 assert(klass->access_flags().is_value_type(), "Value type expected"); 4513 defining_loader_data->record_dependency(klass, CHECK); 4514 } 4515 } 4516 } 4517 } 4518 4519 // utility methods for appending an array with check for duplicates 4520 4521 static void append_interfaces(GrowableArray<Klass*>* result, 4522 const Array<Klass*>* const ifs) { 4523 // iterate over new interfaces 4524 for (int i = 0; i < ifs->length(); i++) { 4525 Klass* const e = ifs->at(i); 4526 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4527 // add new interface 4528 result->append_if_missing(e); 4529 } 4530 } 4531 4532 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4533 Array<Klass*>* local_ifs, 4534 ClassLoaderData* loader_data, 4535 TRAPS) { 4536 assert(local_ifs != NULL, "invariant"); 4537 assert(loader_data != NULL, "invariant"); 4538 4539 // Compute maximum size for transitive interfaces 4540 int max_transitive_size = 0; 4541 int super_size = 0; 4542 // Add superclass transitive interfaces size 4543 if (super != NULL) { 4544 super_size = super->transitive_interfaces()->length(); 4545 max_transitive_size += super_size; 4546 } 4547 // Add local interfaces' super interfaces 4548 const int local_size = local_ifs->length(); 4549 for (int i = 0; i < local_size; i++) { 4550 Klass* const l = local_ifs->at(i); 4551 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4552 } 4553 // Finally add local interfaces 4554 max_transitive_size += local_size; 4555 // Construct array 4556 if (max_transitive_size == 0) { 4557 // no interfaces, use canonicalized array 4558 return Universe::the_empty_klass_array(); 4559 } else if (max_transitive_size == super_size) { 4560 // no new local interfaces added, share superklass' transitive interface array 4561 return super->transitive_interfaces(); 4562 } else if (max_transitive_size == local_size) { 4563 // only local interfaces added, share local interface array 4564 return local_ifs; 4565 } else { 4566 ResourceMark rm; 4567 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4568 4569 // Copy down from superclass 4570 if (super != NULL) { 4571 append_interfaces(result, super->transitive_interfaces()); 4572 } 4573 4574 // Copy down from local interfaces' superinterfaces 4575 for (int i = 0; i < local_size; i++) { 4576 Klass* const l = local_ifs->at(i); 4577 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4578 } 4579 // Finally add local interfaces 4580 append_interfaces(result, local_ifs); 4581 4582 // length will be less than the max_transitive_size if duplicates were removed 4583 const int length = result->length(); 4584 assert(length <= max_transitive_size, "just checking"); 4585 Array<Klass*>* const new_result = 4586 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4587 for (int i = 0; i < length; i++) { 4588 Klass* const e = result->at(i); 4589 assert(e != NULL, "just checking"); 4590 new_result->at_put(i, e); 4591 } 4592 return new_result; 4593 } 4594 } 4595 4596 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4597 assert(this_klass != NULL, "invariant"); 4598 const Klass* const super = this_klass->super(); 4599 if (super != NULL) { 4600 4601 // If the loader is not the boot loader then throw an exception if its 4602 // superclass is in package jdk.internal.reflect and its loader is not a 4603 // special reflection class loader 4604 if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) { 4605 assert(super->is_instance_klass(), "super is not instance klass"); 4606 PackageEntry* super_package = super->package(); 4607 if (super_package != NULL && 4608 super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 && 4609 !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) { 4610 ResourceMark rm(THREAD); 4611 Exceptions::fthrow( 4612 THREAD_AND_LOCATION, 4613 vmSymbols::java_lang_IllegalAccessError(), 4614 "class %s loaded by %s cannot access jdk/internal/reflect superclass %s", 4615 this_klass->external_name(), 4616 this_klass->class_loader_data()->loader_name(), 4617 super->external_name()); 4618 return; 4619 } 4620 } 4621 4622 Reflection::VerifyClassAccessResults vca_result = 4623 Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false); 4624 if (vca_result != Reflection::ACCESS_OK) { 4625 ResourceMark rm(THREAD); 4626 char* msg = Reflection::verify_class_access_msg(this_klass, 4627 InstanceKlass::cast(super), 4628 vca_result); 4629 if (msg == NULL) { 4630 Exceptions::fthrow( 4631 THREAD_AND_LOCATION, 4632 vmSymbols::java_lang_IllegalAccessError(), 4633 "class %s cannot access its superclass %s", 4634 this_klass->external_name(), 4635 super->external_name()); 4636 } else { 4637 // Add additional message content. 4638 Exceptions::fthrow( 4639 THREAD_AND_LOCATION, 4640 vmSymbols::java_lang_IllegalAccessError(), 4641 "superclass access check failed: %s", 4642 msg); 4643 } 4644 } 4645 } 4646 } 4647 4648 4649 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4650 assert(this_klass != NULL, "invariant"); 4651 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4652 const int lng = local_interfaces->length(); 4653 for (int i = lng - 1; i >= 0; i--) { 4654 Klass* const k = local_interfaces->at(i); 4655 assert (k != NULL && k->is_interface(), "invalid interface"); 4656 Reflection::VerifyClassAccessResults vca_result = 4657 Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false); 4658 if (vca_result != Reflection::ACCESS_OK) { 4659 ResourceMark rm(THREAD); 4660 char* msg = Reflection::verify_class_access_msg(this_klass, 4661 InstanceKlass::cast(k), 4662 vca_result); 4663 if (msg == NULL) { 4664 Exceptions::fthrow( 4665 THREAD_AND_LOCATION, 4666 vmSymbols::java_lang_IllegalAccessError(), 4667 "class %s cannot access its superinterface %s", 4668 this_klass->external_name(), 4669 k->external_name()); 4670 } else { 4671 // Add additional message content. 4672 Exceptions::fthrow( 4673 THREAD_AND_LOCATION, 4674 vmSymbols::java_lang_IllegalAccessError(), 4675 "superinterface check failed: %s", 4676 msg); 4677 } 4678 } 4679 } 4680 } 4681 4682 4683 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4684 assert(this_klass != NULL, "invariant"); 4685 const Array<Method*>* const methods = this_klass->methods(); 4686 const int num_methods = methods->length(); 4687 4688 // go thru each method and check if it overrides a final method 4689 for (int index = 0; index < num_methods; index++) { 4690 const Method* const m = methods->at(index); 4691 4692 // skip private, static, and <init> methods 4693 if ((!m->is_private() && !m->is_static()) && 4694 (m->name() != vmSymbols::object_initializer_name())) { 4695 4696 const Symbol* const name = m->name(); 4697 const Symbol* const signature = m->signature(); 4698 const Klass* k = this_klass->super(); 4699 const Method* super_m = NULL; 4700 while (k != NULL) { 4701 // skip supers that don't have final methods. 4702 if (k->has_final_method()) { 4703 // lookup a matching method in the super class hierarchy 4704 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4705 if (super_m == NULL) { 4706 break; // didn't find any match; get out 4707 } 4708 4709 if (super_m->is_final() && !super_m->is_static() && 4710 // matching method in super is final, and not static 4711 (Reflection::verify_field_access(this_klass, 4712 super_m->method_holder(), 4713 super_m->method_holder(), 4714 super_m->access_flags(), false)) 4715 // this class can access super final method and therefore override 4716 ) { 4717 ResourceMark rm(THREAD); 4718 Exceptions::fthrow( 4719 THREAD_AND_LOCATION, 4720 vmSymbols::java_lang_VerifyError(), 4721 "class %s overrides final method %s.%s%s", 4722 this_klass->external_name(), 4723 super_m->method_holder()->external_name(), 4724 name->as_C_string(), 4725 signature->as_C_string() 4726 ); 4727 return; 4728 } 4729 4730 // continue to look from super_m's holder's super. 4731 k = super_m->method_holder()->super(); 4732 continue; 4733 } 4734 4735 k = k->super(); 4736 } 4737 } 4738 } 4739 } 4740 4741 4742 // assumes that this_klass is an interface 4743 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4744 assert(this_klass != NULL, "invariant"); 4745 assert(this_klass->is_interface(), "not an interface"); 4746 const Array<Method*>* methods = this_klass->methods(); 4747 const int num_methods = methods->length(); 4748 4749 for (int index = 0; index < num_methods; index++) { 4750 const Method* const m = methods->at(index); 4751 // if m is static and not the init method, throw a verify error 4752 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4753 ResourceMark rm(THREAD); 4754 Exceptions::fthrow( 4755 THREAD_AND_LOCATION, 4756 vmSymbols::java_lang_VerifyError(), 4757 "Illegal static method %s in interface %s", 4758 m->name()->as_C_string(), 4759 this_klass->external_name() 4760 ); 4761 return; 4762 } 4763 } 4764 } 4765 4766 // utility methods for format checking 4767 4768 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4769 const bool is_module = (flags & JVM_ACC_MODULE) != 0; 4770 assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set"); 4771 if (is_module) { 4772 ResourceMark rm(THREAD); 4773 Exceptions::fthrow( 4774 THREAD_AND_LOCATION, 4775 vmSymbols::java_lang_NoClassDefFoundError(), 4776 "%s is not a class because access_flag ACC_MODULE is set", 4777 _class_name->as_C_string()); 4778 return; 4779 } 4780 4781 if (!_need_verify) { return; } 4782 4783 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4784 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4785 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4786 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4787 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4788 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4789 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4790 4791 if ((is_abstract && is_final) || 4792 (is_interface && !is_abstract) || 4793 (is_interface && major_gte_15 && (is_super || is_enum)) || 4794 (!is_interface && major_gte_15 && is_annotation)) { 4795 ResourceMark rm(THREAD); 4796 Exceptions::fthrow( 4797 THREAD_AND_LOCATION, 4798 vmSymbols::java_lang_ClassFormatError(), 4799 "Illegal class modifiers in class %s: 0x%X", 4800 _class_name->as_C_string(), flags 4801 ); 4802 return; 4803 } 4804 } 4805 4806 static bool has_illegal_visibility(jint flags) { 4807 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4808 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4809 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4810 4811 return ((is_public && is_protected) || 4812 (is_public && is_private) || 4813 (is_protected && is_private)); 4814 } 4815 4816 static bool is_supported_version(u2 major, u2 minor){ 4817 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4818 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4819 (major <= max_version) && 4820 ((major != max_version) || 4821 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4822 } 4823 4824 void ClassFileParser::verify_legal_field_modifiers(jint flags, 4825 bool is_interface, 4826 TRAPS) const { 4827 if (!_need_verify) { return; } 4828 4829 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4830 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4831 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4832 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4833 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4834 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4835 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4836 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4837 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4838 4839 bool is_illegal = false; 4840 4841 if (is_interface) { 4842 if (!is_public || !is_static || !is_final || is_private || 4843 is_protected || is_volatile || is_transient || 4844 (major_gte_15 && is_enum)) { 4845 is_illegal = true; 4846 } 4847 } else { // not interface 4848 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4849 is_illegal = true; 4850 } 4851 } 4852 4853 if (is_illegal) { 4854 ResourceMark rm(THREAD); 4855 Exceptions::fthrow( 4856 THREAD_AND_LOCATION, 4857 vmSymbols::java_lang_ClassFormatError(), 4858 "Illegal field modifiers in class %s: 0x%X", 4859 _class_name->as_C_string(), flags); 4860 return; 4861 } 4862 } 4863 4864 void ClassFileParser::verify_legal_method_modifiers(jint flags, 4865 bool is_interface, 4866 const Symbol* name, 4867 TRAPS) const { 4868 if (!_need_verify) { return; } 4869 4870 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4871 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4872 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4873 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4874 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4875 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4876 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4877 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4878 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4879 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4880 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4881 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4882 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4883 4884 bool is_illegal = false; 4885 4886 if (is_interface) { 4887 if (major_gte_8) { 4888 // Class file version is JAVA_8_VERSION or later Methods of 4889 // interfaces may set any of the flags except ACC_PROTECTED, 4890 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4891 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4892 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4893 (is_native || is_protected || is_final || is_synchronized) || 4894 // If a specific method of a class or interface has its 4895 // ACC_ABSTRACT flag set, it must not have any of its 4896 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4897 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4898 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4899 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4900 (is_abstract && (is_private || is_static || is_strict))) { 4901 is_illegal = true; 4902 } 4903 } else if (major_gte_15) { 4904 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4905 if (!is_public || is_private || is_protected || is_static || is_final || 4906 is_synchronized || is_native || !is_abstract || is_strict) { 4907 is_illegal = true; 4908 } 4909 } else { 4910 // Class file version is pre-JAVA_1_5_VERSION 4911 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4912 is_illegal = true; 4913 } 4914 } 4915 } else { // not interface 4916 if (has_illegal_visibility(flags)) { 4917 is_illegal = true; 4918 } else { 4919 if (is_initializer) { 4920 if (is_static || is_final || is_synchronized || is_native || 4921 is_abstract || (major_gte_15 && is_bridge)) { 4922 is_illegal = true; 4923 } 4924 } else { // not initializer 4925 if (is_abstract) { 4926 if ((is_final || is_native || is_private || is_static || 4927 (major_gte_15 && (is_synchronized || is_strict)))) { 4928 is_illegal = true; 4929 } 4930 } 4931 } 4932 } 4933 } 4934 4935 if (is_illegal) { 4936 ResourceMark rm(THREAD); 4937 Exceptions::fthrow( 4938 THREAD_AND_LOCATION, 4939 vmSymbols::java_lang_ClassFormatError(), 4940 "Method %s in class %s has illegal modifiers: 0x%X", 4941 name->as_C_string(), _class_name->as_C_string(), flags); 4942 return; 4943 } 4944 } 4945 4946 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4947 int length, 4948 TRAPS) const { 4949 assert(_need_verify, "only called when _need_verify is true"); 4950 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) { 4951 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4952 } 4953 } 4954 4955 // Unqualified names may not contain the characters '.', ';', '[', or '/'. 4956 // In class names, '/' separates unqualified names. This is verified in this function also. 4957 // Method names also may not contain the characters '<' or '>', unless <init> 4958 // or <clinit>. Note that method names may not be <init> or <clinit> in this 4959 // method. Because these names have been checked as special cases before 4960 // calling this method in verify_legal_method_name. 4961 // 4962 // This method is also called from the modular system APIs in modules.cpp 4963 // to verify the validity of module and package names. 4964 bool ClassFileParser::verify_unqualified_name(const char* name, 4965 unsigned int length, 4966 int type) { 4967 for (const char* p = name; p != name + length;) { 4968 jchar ch = *p; 4969 if (ch < 128) { 4970 if (ch == '.' || ch == ';' || ch == '[' ) { 4971 return false; // do not permit '.', ';', or '[' 4972 } 4973 if (ch == '/') { 4974 // check for '//' or leading or trailing '/' which are not legal 4975 // unqualified name must not be empty 4976 if (type == ClassFileParser::LegalClass) { 4977 if (p == name || p+1 >= name+length || *(p+1) == '/') { 4978 return false; 4979 } 4980 } else { 4981 return false; // do not permit '/' unless it's class name 4982 } 4983 } 4984 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) { 4985 return false; // do not permit '<' or '>' in method names 4986 } 4987 p++; 4988 } else { 4989 char* tmp_p = UTF8::next(p, &ch); 4990 p = tmp_p; 4991 } 4992 } 4993 return true; 4994 } 4995 4996 // Take pointer to a string. Skip over the longest part of the string that could 4997 // be taken as a fieldname. Allow '/' if slash_ok is true. 4998 // Return a pointer to just past the fieldname. 4999 // Return NULL if no fieldname at all was found, or in the case of slash_ok 5000 // being true, we saw consecutive slashes (meaning we were looking for a 5001 // qualified path but found something that was badly-formed). 5002 static const char* skip_over_field_name(const char* name, 5003 bool slash_ok, 5004 unsigned int length) { 5005 const char* p; 5006 jboolean last_is_slash = false; 5007 jboolean not_first_ch = false; 5008 5009 for (p = name; p != name + length; not_first_ch = true) { 5010 const char* old_p = p; 5011 jchar ch = *p; 5012 if (ch < 128) { 5013 p++; 5014 // quick check for ascii 5015 if ((ch >= 'a' && ch <= 'z') || 5016 (ch >= 'A' && ch <= 'Z') || 5017 (ch == '_' || ch == '$') || 5018 (not_first_ch && ch >= '0' && ch <= '9')) { 5019 last_is_slash = false; 5020 continue; 5021 } 5022 if (slash_ok && ch == '/') { 5023 if (last_is_slash) { 5024 return NULL; // Don't permit consecutive slashes 5025 } 5026 last_is_slash = true; 5027 continue; 5028 } 5029 } 5030 else { 5031 jint unicode_ch; 5032 char* tmp_p = UTF8::next_character(p, &unicode_ch); 5033 p = tmp_p; 5034 last_is_slash = false; 5035 // Check if ch is Java identifier start or is Java identifier part 5036 // 4672820: call java.lang.Character methods directly without generating separate tables. 5037 EXCEPTION_MARK; 5038 5039 // return value 5040 JavaValue result(T_BOOLEAN); 5041 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 5042 JavaCallArguments args; 5043 args.push_int(unicode_ch); 5044 5045 // public static boolean isJavaIdentifierStart(char ch); 5046 JavaCalls::call_static(&result, 5047 SystemDictionary::Character_klass(), 5048 vmSymbols::isJavaIdentifierStart_name(), 5049 vmSymbols::int_bool_signature(), 5050 &args, 5051 THREAD); 5052 5053 if (HAS_PENDING_EXCEPTION) { 5054 CLEAR_PENDING_EXCEPTION; 5055 return 0; 5056 } 5057 if (result.get_jboolean()) { 5058 continue; 5059 } 5060 5061 if (not_first_ch) { 5062 // public static boolean isJavaIdentifierPart(char ch); 5063 JavaCalls::call_static(&result, 5064 SystemDictionary::Character_klass(), 5065 vmSymbols::isJavaIdentifierPart_name(), 5066 vmSymbols::int_bool_signature(), 5067 &args, 5068 THREAD); 5069 5070 if (HAS_PENDING_EXCEPTION) { 5071 CLEAR_PENDING_EXCEPTION; 5072 return 0; 5073 } 5074 5075 if (result.get_jboolean()) { 5076 continue; 5077 } 5078 } 5079 } 5080 return (not_first_ch) ? old_p : NULL; 5081 } 5082 return (not_first_ch) ? p : NULL; 5083 } 5084 5085 // Take pointer to a string. Skip over the longest part of the string that could 5086 // be taken as a field signature. Allow "void" if void_ok. 5087 // Return a pointer to just past the signature. 5088 // Return NULL if no legal signature is found. 5089 const char* ClassFileParser::skip_over_field_signature(const char* signature, 5090 bool void_ok, 5091 unsigned int length, 5092 TRAPS) const { 5093 unsigned int array_dim = 0; 5094 while (length > 0) { 5095 switch (signature[0]) { 5096 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 5097 case JVM_SIGNATURE_BOOLEAN: 5098 case JVM_SIGNATURE_BYTE: 5099 case JVM_SIGNATURE_CHAR: 5100 case JVM_SIGNATURE_SHORT: 5101 case JVM_SIGNATURE_INT: 5102 case JVM_SIGNATURE_FLOAT: 5103 case JVM_SIGNATURE_LONG: 5104 case JVM_SIGNATURE_DOUBLE: 5105 return signature + 1; 5106 case JVM_SIGNATURE_CLASS: 5107 case JVM_SIGNATURE_VALUE_CLASS: { 5108 if (_major_version < JAVA_1_5_VERSION) { 5109 // Skip over the class name if one is there 5110 const char* const p = skip_over_field_name(signature + 1, true, --length); 5111 5112 // The next character better be a semicolon 5113 if (p && (p - signature) > 1 && p[0] == ';') { 5114 return p + 1; 5115 } 5116 } 5117 else { 5118 // Skip leading 'L' and ignore first appearance of ';' 5119 length--; 5120 signature++; 5121 char* c = strchr((char*) signature, ';'); 5122 // Format check signature 5123 if (c != NULL) { 5124 ResourceMark rm(THREAD); 5125 int newlen = c - (char*) signature; 5126 char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1); 5127 strncpy(sig, signature, newlen); 5128 sig[newlen] = '\0'; 5129 5130 bool legal = verify_unqualified_name(sig, newlen, LegalClass); 5131 if (!legal) { 5132 classfile_parse_error("Class name contains illegal character " 5133 "in descriptor in class file %s", 5134 CHECK_0); 5135 return NULL; 5136 } 5137 return signature + newlen + 1; 5138 } 5139 } 5140 return NULL; 5141 } 5142 case JVM_SIGNATURE_ARRAY: 5143 array_dim++; 5144 if (array_dim > 255) { 5145 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 5146 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 5147 } 5148 // The rest of what's there better be a legal signature 5149 signature++; 5150 length--; 5151 void_ok = false; 5152 break; 5153 default: 5154 return NULL; 5155 } 5156 } 5157 return NULL; 5158 } 5159 5160 // Checks if name is a legal class name. 5161 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 5162 if (!_need_verify || _relax_verify) { return; } 5163 5164 char buf[fixed_buffer_size]; 5165 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5166 unsigned int length = name->utf8_length(); 5167 bool legal = false; 5168 5169 if (length > 0) { 5170 const char* p; 5171 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 5172 p = skip_over_field_signature(bytes, false, length, CHECK); 5173 legal = (p != NULL) && ((p - bytes) == (int)length); 5174 } else if (_major_version < JAVA_1_5_VERSION) { 5175 if (bytes[0] != '<') { 5176 p = skip_over_field_name(bytes, true, length); 5177 legal = (p != NULL) && ((p - bytes) == (int)length); 5178 } 5179 } else { 5180 // 4900761: relax the constraints based on JSR202 spec 5181 // Class names may be drawn from the entire Unicode character set. 5182 // Identifiers between '/' must be unqualified names. 5183 // The utf8 string has been verified when parsing cpool entries. 5184 legal = verify_unqualified_name(bytes, length, LegalClass); 5185 } 5186 } 5187 if (!legal) { 5188 ResourceMark rm(THREAD); 5189 assert(_class_name != NULL, "invariant"); 5190 Exceptions::fthrow( 5191 THREAD_AND_LOCATION, 5192 vmSymbols::java_lang_ClassFormatError(), 5193 "Illegal class name \"%s\" in class file %s", bytes, 5194 _class_name->as_C_string() 5195 ); 5196 return; 5197 } 5198 } 5199 5200 // Checks if name is a legal field name. 5201 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 5202 if (!_need_verify || _relax_verify) { return; } 5203 5204 char buf[fixed_buffer_size]; 5205 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5206 unsigned int length = name->utf8_length(); 5207 bool legal = false; 5208 5209 if (length > 0) { 5210 if (_major_version < JAVA_1_5_VERSION) { 5211 if (bytes[0] != '<') { 5212 const char* p = skip_over_field_name(bytes, false, length); 5213 legal = (p != NULL) && ((p - bytes) == (int)length); 5214 } 5215 } else { 5216 // 4881221: relax the constraints based on JSR202 spec 5217 legal = verify_unqualified_name(bytes, length, LegalField); 5218 } 5219 } 5220 5221 if (!legal) { 5222 ResourceMark rm(THREAD); 5223 assert(_class_name != NULL, "invariant"); 5224 Exceptions::fthrow( 5225 THREAD_AND_LOCATION, 5226 vmSymbols::java_lang_ClassFormatError(), 5227 "Illegal field name \"%s\" in class %s", bytes, 5228 _class_name->as_C_string() 5229 ); 5230 return; 5231 } 5232 } 5233 5234 // Checks if name is a legal method name. 5235 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 5236 if (!_need_verify || _relax_verify) { return; } 5237 5238 assert(name != NULL, "method name is null"); 5239 char buf[fixed_buffer_size]; 5240 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5241 unsigned int length = name->utf8_length(); 5242 bool legal = false; 5243 5244 if (length > 0) { 5245 if (bytes[0] == '<') { 5246 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 5247 legal = true; 5248 } 5249 } else if (_major_version < JAVA_1_5_VERSION) { 5250 const char* p; 5251 p = skip_over_field_name(bytes, false, length); 5252 legal = (p != NULL) && ((p - bytes) == (int)length); 5253 } else { 5254 // 4881221: relax the constraints based on JSR202 spec 5255 legal = verify_unqualified_name(bytes, length, LegalMethod); 5256 } 5257 } 5258 5259 if (!legal) { 5260 ResourceMark rm(THREAD); 5261 assert(_class_name != NULL, "invariant"); 5262 Exceptions::fthrow( 5263 THREAD_AND_LOCATION, 5264 vmSymbols::java_lang_ClassFormatError(), 5265 "Illegal method name \"%s\" in class %s", bytes, 5266 _class_name->as_C_string() 5267 ); 5268 return; 5269 } 5270 } 5271 5272 5273 // Checks if signature is a legal field signature. 5274 void ClassFileParser::verify_legal_field_signature(const Symbol* name, 5275 const Symbol* signature, 5276 TRAPS) const { 5277 if (!_need_verify) { return; } 5278 5279 char buf[fixed_buffer_size]; 5280 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5281 const unsigned int length = signature->utf8_length(); 5282 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5283 5284 if (p == NULL || (p - bytes) != (int)length) { 5285 throwIllegalSignature("Field", name, signature, CHECK); 5286 } 5287 } 5288 5289 // Checks if signature is a legal method signature. 5290 // Returns number of parameters 5291 int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5292 const Symbol* signature, 5293 TRAPS) const { 5294 if (!_need_verify) { 5295 // make sure caller's args_size will be less than 0 even for non-static 5296 // method so it will be recomputed in compute_size_of_parameters(). 5297 return -2; 5298 } 5299 5300 // Class initializers cannot have args for class format version >= 51. 5301 if (name == vmSymbols::class_initializer_name() && 5302 signature != vmSymbols::void_method_signature() && 5303 _major_version >= JAVA_7_VERSION) { 5304 throwIllegalSignature("Method", name, signature, CHECK_0); 5305 return 0; 5306 } 5307 5308 unsigned int args_size = 0; 5309 char buf[fixed_buffer_size]; 5310 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5311 unsigned int length = signature->utf8_length(); 5312 const char* nextp; 5313 5314 // The first character must be a '(' 5315 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5316 length--; 5317 // Skip over legal field signatures 5318 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5319 while ((length > 0) && (nextp != NULL)) { 5320 args_size++; 5321 if (p[0] == 'J' || p[0] == 'D') { 5322 args_size++; 5323 } 5324 length -= nextp - p; 5325 p = nextp; 5326 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5327 } 5328 // The first non-signature thing better be a ')' 5329 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5330 length--; 5331 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5332 // All internal methods must return void 5333 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5334 return args_size; 5335 } 5336 } else { 5337 // Now we better just have a return value 5338 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5339 if (nextp && ((int)length == (nextp - p))) { 5340 return args_size; 5341 } 5342 } 5343 } 5344 } 5345 // Report error 5346 throwIllegalSignature("Method", name, signature, CHECK_0); 5347 return 0; 5348 } 5349 5350 int ClassFileParser::static_field_size() const { 5351 assert(_field_info != NULL, "invariant"); 5352 return _field_info->static_field_size; 5353 } 5354 5355 int ClassFileParser::total_oop_map_count() const { 5356 assert(_field_info != NULL, "invariant"); 5357 return _field_info->oop_map_blocks->nonstatic_oop_map_count; 5358 } 5359 5360 jint ClassFileParser::layout_size() const { 5361 assert(_field_info != NULL, "invariant"); 5362 return _field_info->instance_size; 5363 } 5364 5365 static void check_methods_for_intrinsics(const InstanceKlass* ik, 5366 const Array<Method*>* methods) { 5367 assert(ik != NULL, "invariant"); 5368 assert(methods != NULL, "invariant"); 5369 5370 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5371 // (We used to do this lazily, but now we query it in Rewriter, 5372 // which is eagerly done for every method, so we might as well do it now, 5373 // when everything is fresh in memory.) 5374 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5375 5376 if (klass_id != vmSymbols::NO_SID) { 5377 for (int j = 0; j < methods->length(); ++j) { 5378 Method* method = methods->at(j); 5379 method->init_intrinsic_id(); 5380 5381 if (CheckIntrinsics) { 5382 // Check if an intrinsic is defined for method 'method', 5383 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5384 if (method->intrinsic_id() != vmIntrinsics::_none && 5385 !method->intrinsic_candidate()) { 5386 tty->print("Compiler intrinsic is defined for method [%s], " 5387 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5388 method->name_and_sig_as_C_string(), 5389 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5390 ); 5391 tty->cr(); 5392 DEBUG_ONLY(vm_exit(1)); 5393 } 5394 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5395 // but there is no intrinsic available for it. 5396 if (method->intrinsic_candidate() && 5397 method->intrinsic_id() == vmIntrinsics::_none) { 5398 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5399 "but no compiler intrinsic is defined for the method.%s", 5400 method->name_and_sig_as_C_string(), 5401 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5402 ); 5403 tty->cr(); 5404 DEBUG_ONLY(vm_exit(1)); 5405 } 5406 } 5407 } // end for 5408 5409 #ifdef ASSERT 5410 if (CheckIntrinsics) { 5411 // Check for orphan methods in the current class. A method m 5412 // of a class C is orphan if an intrinsic is defined for method m, 5413 // but class C does not declare m. 5414 // The check is potentially expensive, therefore it is available 5415 // only in debug builds. 5416 5417 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5418 if (vmIntrinsics::_compiledLambdaForm == id) { 5419 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5420 // generated for the JVM from a LambdaForm and therefore no method 5421 // is defined for it. 5422 continue; 5423 } 5424 5425 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5426 // Check if the current class contains a method with the same 5427 // name, flags, signature. 5428 bool match = false; 5429 for (int j = 0; j < methods->length(); ++j) { 5430 const Method* method = methods->at(j); 5431 if (method->intrinsic_id() == id) { 5432 match = true; 5433 break; 5434 } 5435 } 5436 5437 if (!match) { 5438 char buf[1000]; 5439 tty->print("Compiler intrinsic is defined for method [%s], " 5440 "but the method is not available in class [%s].%s", 5441 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5442 buf, sizeof(buf)), 5443 ik->name()->as_C_string(), 5444 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5445 ); 5446 tty->cr(); 5447 DEBUG_ONLY(vm_exit(1)); 5448 } 5449 } 5450 } // end for 5451 } // CheckIntrinsics 5452 #endif // ASSERT 5453 } 5454 } 5455 5456 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) { 5457 if (_klass != NULL) { 5458 return _klass; 5459 } 5460 5461 InstanceKlass* const ik = 5462 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5463 5464 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL); 5465 5466 assert(_klass == ik, "invariant"); 5467 5468 ik->set_has_passed_fingerprint_check(false); 5469 if (UseAOT && ik->supers_have_passed_fingerprint_checks()) { 5470 uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik); 5471 if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) { 5472 // This class matches with a class saved in an AOT library 5473 ik->set_has_passed_fingerprint_check(true); 5474 } else { 5475 ResourceMark rm; 5476 log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT, 5477 ik->external_name(), aot_fp, _stream->compute_fingerprint()); 5478 } 5479 } 5480 5481 return ik; 5482 } 5483 5484 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) { 5485 assert(ik != NULL, "invariant"); 5486 5487 set_klass_to_deallocate(ik); 5488 5489 assert(_field_info != NULL, "invariant"); 5490 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5491 assert(ik->nonstatic_oop_map_count() == _field_info->oop_map_blocks->nonstatic_oop_map_count, 5492 "sanity"); 5493 5494 assert(ik->is_instance_klass(), "sanity"); 5495 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5496 5497 // Fill in information already parsed 5498 ik->set_should_verify_class(_need_verify); 5499 5500 // Not yet: supers are done below to support the new subtype-checking fields 5501 ik->set_class_loader_data(_loader_data); 5502 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5503 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5504 assert(_fac != NULL, "invariant"); 5505 ik->set_static_oop_field_count(_fac->count[STATIC_OOP] + _fac->count[STATIC_VALUETYPE]); 5506 5507 // this transfers ownership of a lot of arrays from 5508 // the parser onto the InstanceKlass* 5509 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5510 5511 // note that is not safe to use the fields in the parser from this point on 5512 assert(NULL == _cp, "invariant"); 5513 assert(NULL == _fields, "invariant"); 5514 assert(NULL == _methods, "invariant"); 5515 assert(NULL == _inner_classes, "invariant"); 5516 assert(NULL == _local_interfaces, "invariant"); 5517 assert(NULL == _transitive_interfaces, "invariant"); 5518 assert(NULL == _combined_annotations, "invariant"); 5519 5520 if (_has_final_method) { 5521 ik->set_has_final_method(); 5522 } 5523 5524 ik->copy_method_ordering(_method_ordering, CHECK); 5525 // The InstanceKlass::_methods_jmethod_ids cache 5526 // is managed on the assumption that the initial cache 5527 // size is equal to the number of methods in the class. If 5528 // that changes, then InstanceKlass::idnum_can_increment() 5529 // has to be changed accordingly. 5530 ik->set_initial_method_idnum(ik->methods()->length()); 5531 5532 ik->set_name(_class_name); 5533 5534 if (is_anonymous()) { 5535 // _this_class_index is a CONSTANT_Class entry that refers to this 5536 // anonymous class itself. If this class needs to refer to its own methods or 5537 // fields, it would use a CONSTANT_MethodRef, etc, which would reference 5538 // _this_class_index. However, because this class is anonymous (it's 5539 // not stored in SystemDictionary), _this_class_index cannot be resolved 5540 // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup. 5541 // Therefore, we must eagerly resolve _this_class_index now. 5542 ik->constants()->klass_at_put(_this_class_index, ik); 5543 } 5544 5545 ik->set_minor_version(_minor_version); 5546 ik->set_major_version(_major_version); 5547 ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods); 5548 ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods); 5549 5550 if (_host_klass != NULL) { 5551 assert (ik->is_anonymous(), "should be the same"); 5552 ik->set_host_klass(_host_klass); 5553 } 5554 5555 // Set PackageEntry for this_klass 5556 oop cl = ik->class_loader(); 5557 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl)); 5558 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh()); 5559 ik->set_package(cld, CHECK); 5560 5561 const Array<Method*>* const methods = ik->methods(); 5562 assert(methods != NULL, "invariant"); 5563 const int methods_len = methods->length(); 5564 5565 check_methods_for_intrinsics(ik, methods); 5566 5567 // Fill in field values obtained by parse_classfile_attributes 5568 if (_parsed_annotations->has_any_annotations()) { 5569 _parsed_annotations->apply_to(ik); 5570 } 5571 5572 apply_parsed_class_attributes(ik); 5573 5574 // Miranda methods 5575 if ((_num_miranda_methods > 0) || 5576 // if this class introduced new miranda methods or 5577 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5578 // super class exists and this class inherited miranda methods 5579 ) { 5580 ik->set_has_miranda_methods(); // then set a flag 5581 } 5582 5583 // Fill in information needed to compute superclasses. 5584 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5585 5586 // Initialize itable offset tables 5587 klassItable::setup_itable_offset_table(ik); 5588 5589 // Compute transitive closure of interfaces this class implements 5590 // Do final class setup 5591 OopMapBlocksBuilder* oop_map_blocks = _field_info->oop_map_blocks; 5592 if (oop_map_blocks->nonstatic_oop_map_count > 0) { 5593 oop_map_blocks->copy(ik->start_of_nonstatic_oop_maps()); 5594 } 5595 5596 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5597 set_precomputed_flags(ik); 5598 5599 // check if this class can access its super class 5600 check_super_class_access(ik, CHECK); 5601 5602 // check if this class can access its superinterfaces 5603 check_super_interface_access(ik, CHECK); 5604 5605 // check if this class overrides any final method 5606 check_final_method_override(ik, CHECK); 5607 5608 // reject static interface methods prior to Java 8 5609 if (ik->is_interface() && _major_version < JAVA_8_VERSION) { 5610 check_illegal_static_method(ik, CHECK); 5611 } 5612 5613 // Obtain this_klass' module entry 5614 ModuleEntry* module_entry = ik->module(); 5615 assert(module_entry != NULL, "module_entry should always be set"); 5616 5617 // Obtain java.lang.Module 5618 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module())); 5619 5620 // Allocate mirror and initialize static fields 5621 // The create_mirror() call will also call compute_modifiers() 5622 java_lang_Class::create_mirror(ik, 5623 Handle(THREAD, _loader_data->class_loader()), 5624 module_handle, 5625 _protection_domain, 5626 CHECK); 5627 5628 assert(_all_mirandas != NULL, "invariant"); 5629 5630 // Generate any default methods - default methods are public interface methods 5631 // that have a default implementation. This is new with Java 8. 5632 if (_has_nonstatic_concrete_methods) { 5633 DefaultMethods::generate_default_methods(ik, 5634 _all_mirandas, 5635 CHECK); 5636 } 5637 5638 // Valhalla shady value type conversion 5639 if (_parsed_annotations->is_derive_value_type()) { 5640 ik->create_derive_value_type(Handle(THREAD, _loader_data->class_loader()), 5641 _protection_domain, CHECK); 5642 } 5643 5644 // Add read edges to the unnamed modules of the bootstrap and app class loaders. 5645 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() && 5646 !module_entry->has_default_read_edges()) { 5647 if (!module_entry->set_has_default_read_edges()) { 5648 // We won a potential race 5649 JvmtiExport::add_default_read_edges(module_handle, THREAD); 5650 } 5651 } 5652 5653 // Update the loader_data graph. 5654 record_defined_class_dependencies(ik, CHECK); 5655 5656 for (FieldStream st((InstanceKlass*)ik, false, false); !st.eos(); st.next()) { 5657 Symbol* signature = st.signature(); 5658 if (signature->starts_with("Q")) { 5659 Klass* klass = SystemDictionary::resolve_or_fail(signature, 5660 Handle(THREAD, ik->class_loader()), 5661 Handle(THREAD, ik->protection_domain()), true, CHECK); 5662 assert(klass != NULL, "Sanity check"); 5663 assert(klass->access_flags().is_value_type(), "Value type expected"); 5664 ik->set_value_field_klass(st.index(), klass); 5665 } 5666 } 5667 5668 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5669 5670 if (!is_internal()) { 5671 if (log_is_enabled(Info, class, load)) { 5672 ResourceMark rm; 5673 const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string(); 5674 ik->print_class_load_logging(_loader_data, module_name, _stream); 5675 } 5676 5677 if (log_is_enabled(Debug, class, resolve)) { 5678 ResourceMark rm; 5679 // print out the superclass. 5680 const char * from = ik->external_name(); 5681 if (ik->java_super() != NULL) { 5682 log_debug(class, resolve)("%s %s (super)", 5683 from, 5684 ik->java_super()->external_name()); 5685 } 5686 // print out each of the interface classes referred to by this class. 5687 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5688 if (local_interfaces != NULL) { 5689 const int length = local_interfaces->length(); 5690 for (int i = 0; i < length; i++) { 5691 const Klass* const k = local_interfaces->at(i); 5692 const char * to = k->external_name(); 5693 log_debug(class, resolve)("%s %s (interface)", from, to); 5694 } 5695 } 5696 } 5697 } 5698 5699 TRACE_INIT_ID(ik); 5700 5701 // If we reach here, all is well. 5702 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5703 // in order for it to not be destroyed in the ClassFileParser destructor. 5704 set_klass_to_deallocate(NULL); 5705 5706 // it's official 5707 set_klass(ik); 5708 5709 debug_only(ik->verify();) 5710 } 5711 5712 // For an anonymous class that is in the unnamed package, move it to its host class's 5713 // package by prepending its host class's package name to its class name and setting 5714 // its _class_name field. 5715 void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) { 5716 ResourceMark rm(THREAD); 5717 assert(strrchr(_class_name->as_C_string(), '/') == NULL, 5718 "Anonymous class should not be in a package"); 5719 const char* host_pkg_name = 5720 ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL); 5721 5722 if (host_pkg_name != NULL) { 5723 size_t host_pkg_len = strlen(host_pkg_name); 5724 int class_name_len = _class_name->utf8_length(); 5725 char* new_anon_name = 5726 NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len); 5727 // Copy host package name and trailing /. 5728 strncpy(new_anon_name, host_pkg_name, host_pkg_len); 5729 new_anon_name[host_pkg_len] = '/'; 5730 // Append anonymous class name. The anonymous class name can contain odd 5731 // characters. So, do a strncpy instead of using sprintf("%s..."). 5732 strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len); 5733 5734 // Create a symbol and update the anonymous class name. 5735 _class_name = SymbolTable::new_symbol(new_anon_name, 5736 (int)host_pkg_len + 1 + class_name_len, 5737 CHECK); 5738 } 5739 } 5740 5741 // If the host class and the anonymous class are in the same package then do 5742 // nothing. If the anonymous class is in the unnamed package then move it to its 5743 // host's package. If the classes are in different packages then throw an IAE 5744 // exception. 5745 void ClassFileParser::fix_anonymous_class_name(TRAPS) { 5746 assert(_host_klass != NULL, "Expected an anonymous class"); 5747 5748 const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(), 5749 _class_name->utf8_length(), '/'); 5750 if (anon_last_slash == NULL) { // Unnamed package 5751 prepend_host_package_name(_host_klass, CHECK); 5752 } else { 5753 if (!InstanceKlass::is_same_class_package(_host_klass->class_loader(), 5754 _host_klass->name(), 5755 _host_klass->class_loader(), 5756 _class_name)) { 5757 ResourceMark rm(THREAD); 5758 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 5759 err_msg("Host class %s and anonymous class %s are in different packages", 5760 _host_klass->name()->as_C_string(), _class_name->as_C_string())); 5761 } 5762 } 5763 } 5764 5765 static bool relax_format_check_for(ClassLoaderData* loader_data) { 5766 bool trusted = (loader_data->is_the_null_class_loader_data() || 5767 SystemDictionary::is_platform_class_loader(loader_data->class_loader())); 5768 bool need_verify = 5769 // verifyAll 5770 (BytecodeVerificationLocal && BytecodeVerificationRemote) || 5771 // verifyRemote 5772 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); 5773 return !need_verify; 5774 } 5775 5776 ClassFileParser::ClassFileParser(ClassFileStream* stream, 5777 Symbol* name, 5778 ClassLoaderData* loader_data, 5779 Handle protection_domain, 5780 const InstanceKlass* host_klass, 5781 GrowableArray<Handle>* cp_patches, 5782 Publicity pub_level, 5783 TRAPS) : 5784 _stream(stream), 5785 _requested_name(name), 5786 _loader_data(loader_data), 5787 _host_klass(host_klass), 5788 _cp_patches(cp_patches), 5789 _num_patched_klasses(0), 5790 _max_num_patched_klasses(0), 5791 _orig_cp_size(0), 5792 _first_patched_klass_resolved_index(0), 5793 _super_klass(), 5794 _cp(NULL), 5795 _fields(NULL), 5796 _methods(NULL), 5797 _inner_classes(NULL), 5798 _local_interfaces(NULL), 5799 _transitive_interfaces(NULL), 5800 _combined_annotations(NULL), 5801 _annotations(NULL), 5802 _type_annotations(NULL), 5803 _fields_annotations(NULL), 5804 _fields_type_annotations(NULL), 5805 _klass(NULL), 5806 _klass_to_deallocate(NULL), 5807 _parsed_annotations(NULL), 5808 _fac(NULL), 5809 _field_info(NULL), 5810 _method_ordering(NULL), 5811 _all_mirandas(NULL), 5812 _vtable_size(0), 5813 _itable_size(0), 5814 _num_miranda_methods(0), 5815 _rt(REF_NONE), 5816 _protection_domain(protection_domain), 5817 _access_flags(), 5818 _pub_level(pub_level), 5819 _bad_constant_seen(0), 5820 _synthetic_flag(false), 5821 _sde_length(false), 5822 _sde_buffer(NULL), 5823 _sourcefile_index(0), 5824 _generic_signature_index(0), 5825 _major_version(0), 5826 _minor_version(0), 5827 _this_class_index(0), 5828 _super_class_index(0), 5829 _itfs_len(0), 5830 _java_fields_count(0), 5831 _need_verify(false), 5832 _relax_verify(false), 5833 _has_nonstatic_concrete_methods(false), 5834 _declares_nonstatic_concrete_methods(false), 5835 _has_final_method(false), 5836 _has_finalizer(false), 5837 _has_empty_finalizer(false), 5838 _has_vanilla_constructor(false), 5839 _max_bootstrap_specifier_index(-1), 5840 _has_value_fields(false) { 5841 5842 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5843 5844 assert(THREAD->is_Java_thread(), "invariant"); 5845 assert(_loader_data != NULL, "invariant"); 5846 assert(stream != NULL, "invariant"); 5847 assert(_stream != NULL, "invariant"); 5848 assert(_stream->buffer() == _stream->current(), "invariant"); 5849 assert(_class_name != NULL, "invariant"); 5850 assert(0 == _access_flags.as_int(), "invariant"); 5851 5852 // Figure out whether we can skip format checking (matching classic VM behavior) 5853 if (DumpSharedSpaces) { 5854 // verify == true means it's a 'remote' class (i.e., non-boot class) 5855 // Verification decision is based on BytecodeVerificationRemote flag 5856 // for those classes. 5857 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5858 BytecodeVerificationLocal; 5859 } 5860 else { 5861 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5862 stream->need_verify()); 5863 } 5864 if (_cp_patches != NULL) { 5865 int len = _cp_patches->length(); 5866 for (int i=0; i<len; i++) { 5867 if (has_cp_patch_at(i)) { 5868 Handle patch = cp_patch_at(i); 5869 if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) { 5870 // We need to append the names of the patched classes to the end of the constant pool, 5871 // because a patched class may have a Utf8 name that's not already included in the 5872 // original constant pool. These class names are used when patch_constant_pool() 5873 // calls patch_class(). 5874 // 5875 // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class. 5876 // At this point, we don't know the tag for index i yet, because we haven't parsed the 5877 // constant pool. So we can only assume the worst -- every String is used to patch a Class. 5878 _max_num_patched_klasses++; 5879 } 5880 } 5881 } 5882 } 5883 5884 // synch back verification state to stream 5885 stream->set_verify(_need_verify); 5886 5887 // Check if verification needs to be relaxed for this class file 5888 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5889 _relax_verify = relax_format_check_for(_loader_data); 5890 5891 parse_stream(stream, CHECK); 5892 5893 post_process_parsed_stream(stream, _cp, CHECK); 5894 } 5895 5896 void ClassFileParser::clear_class_metadata() { 5897 // metadata created before the instance klass is created. Must be 5898 // deallocated if classfile parsing returns an error. 5899 _cp = NULL; 5900 _fields = NULL; 5901 _methods = NULL; 5902 _inner_classes = NULL; 5903 _local_interfaces = NULL; 5904 _transitive_interfaces = NULL; 5905 _combined_annotations = NULL; 5906 _annotations = _type_annotations = NULL; 5907 _fields_annotations = _fields_type_annotations = NULL; 5908 } 5909 5910 // Destructor to clean up 5911 ClassFileParser::~ClassFileParser() { 5912 if (_cp != NULL) { 5913 MetadataFactory::free_metadata(_loader_data, _cp); 5914 } 5915 if (_fields != NULL) { 5916 MetadataFactory::free_array<u2>(_loader_data, _fields); 5917 } 5918 5919 if (_methods != NULL) { 5920 // Free methods 5921 InstanceKlass::deallocate_methods(_loader_data, _methods); 5922 } 5923 5924 // beware of the Universe::empty_blah_array!! 5925 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5926 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5927 } 5928 5929 // Free interfaces 5930 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5931 _local_interfaces, _transitive_interfaces); 5932 5933 if (_combined_annotations != NULL) { 5934 // After all annotations arrays have been created, they are installed into the 5935 // Annotations object that will be assigned to the InstanceKlass being created. 5936 5937 // Deallocate the Annotations object and the installed annotations arrays. 5938 _combined_annotations->deallocate_contents(_loader_data); 5939 5940 // If the _combined_annotations pointer is non-NULL, 5941 // then the other annotations fields should have been cleared. 5942 assert(_annotations == NULL, "Should have been cleared"); 5943 assert(_type_annotations == NULL, "Should have been cleared"); 5944 assert(_fields_annotations == NULL, "Should have been cleared"); 5945 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5946 } else { 5947 // If the annotations arrays were not installed into the Annotations object, 5948 // then they have to be deallocated explicitly. 5949 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5950 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5951 Annotations::free_contents(_loader_data, _fields_annotations); 5952 Annotations::free_contents(_loader_data, _fields_type_annotations); 5953 } 5954 5955 clear_class_metadata(); 5956 5957 // deallocate the klass if already created. Don't directly deallocate, but add 5958 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5959 // at a safepoint. 5960 if (_klass_to_deallocate != NULL) { 5961 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5962 } 5963 } 5964 5965 void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5966 TRAPS) { 5967 5968 assert(stream != NULL, "invariant"); 5969 assert(_class_name != NULL, "invariant"); 5970 5971 // BEGIN STREAM PARSING 5972 stream->guarantee_more(8, CHECK); // magic, major, minor 5973 // Magic value 5974 const u4 magic = stream->get_u4_fast(); 5975 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5976 "Incompatible magic value %u in class file %s", 5977 magic, CHECK); 5978 5979 // Version numbers 5980 _minor_version = stream->get_u2_fast(); 5981 _major_version = stream->get_u2_fast(); 5982 5983 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5984 ResourceMark rm; 5985 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5986 _major_version, _minor_version, _class_name->as_C_string()); 5987 Exceptions::fthrow( 5988 THREAD_AND_LOCATION, 5989 vmSymbols::java_lang_UnsupportedClassVersionError(), 5990 "Unsupported major.minor version for dump time %u.%u", 5991 _major_version, 5992 _minor_version); 5993 } 5994 5995 // Check version numbers - we check this even with verifier off 5996 if (!is_supported_version(_major_version, _minor_version)) { 5997 ResourceMark rm(THREAD); 5998 Exceptions::fthrow( 5999 THREAD_AND_LOCATION, 6000 vmSymbols::java_lang_UnsupportedClassVersionError(), 6001 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 6002 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 6003 _class_name->as_C_string(), 6004 _major_version, 6005 _minor_version, 6006 JAVA_MAX_SUPPORTED_VERSION, 6007 JAVA_MAX_SUPPORTED_MINOR_VERSION); 6008 return; 6009 } 6010 6011 stream->guarantee_more(3, CHECK); // length, first cp tag 6012 u2 cp_size = stream->get_u2_fast(); 6013 6014 guarantee_property( 6015 cp_size >= 1, "Illegal constant pool size %u in class file %s", 6016 cp_size, CHECK); 6017 6018 _orig_cp_size = cp_size; 6019 if (int(cp_size) + _max_num_patched_klasses > 0xffff) { 6020 THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes"); 6021 } 6022 cp_size += _max_num_patched_klasses; 6023 6024 _cp = ConstantPool::allocate(_loader_data, 6025 cp_size, 6026 CHECK); 6027 6028 ConstantPool* const cp = _cp; 6029 6030 parse_constant_pool(stream, cp, _orig_cp_size, CHECK); 6031 6032 assert(cp_size == (const u2)cp->length(), "invariant"); 6033 6034 // ACCESS FLAGS 6035 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 6036 6037 // Access flags 6038 jint flags; 6039 // JVM_ACC_MODULE is defined in JDK-9 and later. 6040 if (_major_version >= JAVA_9_VERSION) { 6041 flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE); 6042 } else { 6043 flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 6044 } 6045 6046 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 6047 // Set abstract bit for old class files for backward compatibility 6048 flags |= JVM_ACC_ABSTRACT; 6049 } 6050 6051 verify_legal_class_modifiers(flags, CHECK); 6052 6053 short bad_constant = class_bad_constant_seen(); 6054 if (bad_constant != 0) { 6055 // Do not throw CFE until after the access_flags are checked because if 6056 // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE. 6057 classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK); 6058 } 6059 6060 _access_flags.set_flags(flags); 6061 6062 // This class and superclass 6063 _this_class_index = stream->get_u2_fast(); 6064 check_property( 6065 valid_cp_range(_this_class_index, cp_size) && 6066 cp->tag_at(_this_class_index).is_unresolved_klass(), 6067 "Invalid this class index %u in constant pool in class file %s", 6068 _this_class_index, CHECK); 6069 6070 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 6071 assert(class_name_in_cp != NULL, "class_name can't be null"); 6072 6073 // Update _class_name which could be null previously 6074 // to reflect the name in the constant pool 6075 _class_name = class_name_in_cp; 6076 6077 // Don't need to check whether this class name is legal or not. 6078 // It has been checked when constant pool is parsed. 6079 // However, make sure it is not an array type. 6080 if (_need_verify) { 6081 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 6082 "Bad class name in class file %s", 6083 CHECK); 6084 } 6085 6086 // Checks if name in class file matches requested name 6087 if (_requested_name != NULL && _requested_name != _class_name) { 6088 ResourceMark rm(THREAD); 6089 Exceptions::fthrow( 6090 THREAD_AND_LOCATION, 6091 vmSymbols::java_lang_NoClassDefFoundError(), 6092 "%s (wrong name: %s)", 6093 _class_name->as_C_string(), 6094 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 6095 ); 6096 return; 6097 } 6098 6099 // if this is an anonymous class fix up its name if it's in the unnamed 6100 // package. Otherwise, throw IAE if it is in a different package than 6101 // its host class. 6102 if (_host_klass != NULL) { 6103 fix_anonymous_class_name(CHECK); 6104 } 6105 6106 // Verification prevents us from creating names with dots in them, this 6107 // asserts that that's the case. 6108 assert(is_internal_format(_class_name), "external class name format used internally"); 6109 6110 if (!is_internal()) { 6111 if (log_is_enabled(Debug, class, preorder)){ 6112 ResourceMark rm(THREAD); 6113 outputStream* log = Log(class, preorder)::debug_stream(); 6114 log->print("%s", _class_name->as_klass_external_name()); 6115 if (stream->source() != NULL) { 6116 log->print(" source: %s", stream->source()); 6117 } 6118 log->cr(); 6119 } 6120 6121 #if INCLUDE_CDS 6122 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 6123 // Only dump the classes that can be stored into CDS archive. 6124 // Anonymous classes such as generated LambdaForm classes are also not included. 6125 if (SystemDictionaryShared::is_sharing_possible(_loader_data) && 6126 _host_klass == NULL) { 6127 oop class_loader = _loader_data->class_loader(); 6128 ResourceMark rm(THREAD); 6129 // For the boot and platform class loaders, check if the class is not found in the 6130 // java runtime image. Additional check for the boot class loader is if the class 6131 // is not found in the boot loader's appended entries. This indicates that the class 6132 // is not useable during run time, such as the ones found in the --patch-module entries, 6133 // so it should not be included in the classlist file. 6134 if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) || 6135 SystemDictionary::is_platform_class_loader(class_loader)) && 6136 !ClassLoader::is_jrt(stream->source())) { 6137 tty->print_cr("skip writing class %s from source %s to classlist file", 6138 _class_name->as_C_string(), stream->source()); 6139 } else { 6140 classlist_file->print_cr("%s", _class_name->as_C_string()); 6141 classlist_file->flush(); 6142 } 6143 } 6144 } 6145 #endif 6146 } 6147 6148 // SUPERKLASS 6149 _super_class_index = stream->get_u2_fast(); 6150 _super_klass = parse_super_class(cp, 6151 _super_class_index, 6152 _need_verify, 6153 CHECK); 6154 6155 // Interfaces 6156 _itfs_len = stream->get_u2_fast(); 6157 parse_interfaces(stream, 6158 _itfs_len, 6159 cp, 6160 &_has_nonstatic_concrete_methods, 6161 CHECK); 6162 6163 assert(_local_interfaces != NULL, "invariant"); 6164 6165 // Fields (offsets are filled in later) 6166 _fac = new FieldAllocationCount(); 6167 parse_fields(stream, 6168 _access_flags.is_interface(), 6169 _fac, 6170 cp, 6171 cp_size, 6172 &_java_fields_count, 6173 CHECK); 6174 6175 assert(_fields != NULL, "invariant"); 6176 6177 // Methods 6178 AccessFlags promoted_flags; 6179 parse_methods(stream, 6180 _access_flags.is_interface(), 6181 &promoted_flags, 6182 &_has_final_method, 6183 &_declares_nonstatic_concrete_methods, 6184 CHECK); 6185 6186 assert(_methods != NULL, "invariant"); 6187 6188 // promote flags from parse_methods() to the klass' flags 6189 _access_flags.add_promoted_flags(promoted_flags.as_int()); 6190 6191 if (_declares_nonstatic_concrete_methods) { 6192 _has_nonstatic_concrete_methods = true; 6193 } 6194 6195 // Additional attributes/annotations 6196 _parsed_annotations = new ClassAnnotationCollector(); 6197 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 6198 6199 assert(_inner_classes != NULL, "invariant"); 6200 6201 // Finalize the Annotations metadata object, 6202 // now that all annotation arrays have been created. 6203 create_combined_annotations(CHECK); 6204 6205 // Make sure this is the end of class file stream 6206 guarantee_property(stream->at_eos(), 6207 "Extra bytes at the end of class file %s", 6208 CHECK); 6209 6210 // all bytes in stream read and parsed 6211 } 6212 6213 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 6214 ConstantPool* cp, 6215 TRAPS) { 6216 assert(stream != NULL, "invariant"); 6217 assert(stream->at_eos(), "invariant"); 6218 assert(cp != NULL, "invariant"); 6219 assert(_loader_data != NULL, "invariant"); 6220 6221 if (_class_name == vmSymbols::java_lang_Object()) { 6222 check_property(_local_interfaces == Universe::the_empty_klass_array(), 6223 "java.lang.Object cannot implement an interface in class file %s", 6224 CHECK); 6225 } 6226 // We check super class after class file is parsed and format is checked 6227 if (_super_class_index > 0 && NULL ==_super_klass) { 6228 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 6229 if (_access_flags.is_interface()) { 6230 // Before attempting to resolve the superclass, check for class format 6231 // errors not checked yet. 6232 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 6233 "Interfaces must have java.lang.Object as superclass in class file %s", 6234 CHECK); 6235 } 6236 Handle loader(THREAD, _loader_data->class_loader()); 6237 _super_klass = (const InstanceKlass*) 6238 SystemDictionary::resolve_super_or_fail(_class_name, 6239 super_class_name, 6240 loader, 6241 _protection_domain, 6242 true, 6243 CHECK); 6244 } 6245 6246 if (_super_klass != NULL) { 6247 if (_super_klass->has_nonstatic_concrete_methods()) { 6248 _has_nonstatic_concrete_methods = true; 6249 } 6250 6251 if (_super_klass->is_interface()) { 6252 ResourceMark rm(THREAD); 6253 Exceptions::fthrow( 6254 THREAD_AND_LOCATION, 6255 vmSymbols::java_lang_IncompatibleClassChangeError(), 6256 "class %s has interface %s as super class", 6257 _class_name->as_klass_external_name(), 6258 _super_klass->external_name() 6259 ); 6260 return; 6261 } 6262 // Make sure super class is not final 6263 if (_super_klass->is_final() 6264 && !(_super_klass->name() == vmSymbols::java_lang____Value() 6265 && (_access_flags.get_flags() & JVM_ACC_VALUE))) { 6266 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 6267 } 6268 } 6269 6270 // Compute the transitive list of all unique interfaces implemented by this class 6271 _transitive_interfaces = 6272 compute_transitive_interfaces(_super_klass, 6273 _local_interfaces, 6274 _loader_data, 6275 CHECK); 6276 6277 assert(_transitive_interfaces != NULL, "invariant"); 6278 6279 // sort methods 6280 _method_ordering = sort_methods(_methods); 6281 6282 _all_mirandas = new GrowableArray<Method*>(20); 6283 6284 Handle loader(THREAD, _loader_data->class_loader()); 6285 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 6286 &_num_miranda_methods, 6287 _all_mirandas, 6288 _super_klass, 6289 _methods, 6290 _access_flags, 6291 _major_version, 6292 loader, 6293 _class_name, 6294 _local_interfaces, 6295 CHECK); 6296 6297 // Size of Java itable (in words) 6298 _itable_size = _access_flags.is_interface() ? 0 : 6299 klassItable::compute_itable_size(_transitive_interfaces); 6300 6301 assert(_fac != NULL, "invariant"); 6302 assert(_parsed_annotations != NULL, "invariant"); 6303 6304 _field_info = new FieldLayoutInfo(); 6305 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 6306 6307 // Compute reference typ 6308 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 6309 6310 } 6311 6312 void ClassFileParser::set_klass(InstanceKlass* klass) { 6313 6314 #ifdef ASSERT 6315 if (klass != NULL) { 6316 assert(NULL == _klass, "leaking?"); 6317 } 6318 #endif 6319 6320 _klass = klass; 6321 } 6322 6323 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 6324 6325 #ifdef ASSERT 6326 if (klass != NULL) { 6327 assert(NULL == _klass_to_deallocate, "leaking?"); 6328 } 6329 #endif 6330 6331 _klass_to_deallocate = klass; 6332 } 6333 6334 // Caller responsible for ResourceMark 6335 // clone stream with rewound position 6336 const ClassFileStream* ClassFileParser::clone_stream() const { 6337 assert(_stream != NULL, "invariant"); 6338 6339 return _stream->clone(); 6340 } 6341 6342 bool ClassFileParser::is_derive_value_type() const { 6343 return _parsed_annotations->is_derive_value_type(); 6344 } 6345 6346 // ---------------------------------------------------------------------------- 6347 // debugging 6348 6349 #ifdef ASSERT 6350 6351 // return true if class_name contains no '.' (internal format is '/') 6352 bool ClassFileParser::is_internal_format(Symbol* class_name) { 6353 if (class_name != NULL) { 6354 ResourceMark rm; 6355 char* name = class_name->as_C_string(); 6356 return strchr(name, '.') == NULL; 6357 } else { 6358 return true; 6359 } 6360 } 6361 6362 #endif