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