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 // Make sure there is no overflow with injected fields. 1405 assert(count[atype] < 0xFFFF, "More than 65535 fields"); 1406 count[atype]++; 1407 return atype; 1408 } 1409 }; 1410 1411 // Side-effects: populates the _fields, _fields_annotations, 1412 // _fields_type_annotations fields 1413 void ClassFileParser::parse_fields(const ClassFileStream* const cfs, 1414 bool is_interface, 1415 FieldAllocationCount* const fac, 1416 ConstantPool* cp, 1417 const int cp_size, 1418 u2* const java_fields_count_ptr, 1419 TRAPS) { 1420 1421 assert(cfs != NULL, "invariant"); 1422 assert(fac != NULL, "invariant"); 1423 assert(cp != NULL, "invariant"); 1424 assert(java_fields_count_ptr != NULL, "invariant"); 1425 1426 assert(NULL == _fields, "invariant"); 1427 assert(NULL == _fields_annotations, "invariant"); 1428 assert(NULL == _fields_type_annotations, "invariant"); 1429 1430 cfs->guarantee_more(2, CHECK); // length 1431 const u2 length = cfs->get_u2_fast(); 1432 *java_fields_count_ptr = length; 1433 1434 int num_injected = 0; 1435 const InjectedField* const injected = JavaClasses::get_injected(_class_name, 1436 &num_injected); 1437 const int total_fields = length + num_injected; 1438 1439 // The field array starts with tuples of shorts 1440 // [access, name index, sig index, initial value index, byte offset]. 1441 // A generic signature slot only exists for field with generic 1442 // signature attribute. And the access flag is set with 1443 // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic 1444 // signature slots are at the end of the field array and after all 1445 // other fields data. 1446 // 1447 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 1448 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 1449 // ... 1450 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 1451 // [generic signature index] 1452 // [generic signature index] 1453 // ... 1454 // 1455 // Allocate a temporary resource array for field data. For each field, 1456 // a slot is reserved in the temporary array for the generic signature 1457 // index. After parsing all fields, the data are copied to a permanent 1458 // array and any unused slots will be discarded. 1459 ResourceMark rm(THREAD); 1460 u2* const fa = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, 1461 u2, 1462 total_fields * (FieldInfo::field_slots + 1)); 1463 1464 // The generic signature slots start after all other fields' data. 1465 int generic_signature_slot = total_fields * FieldInfo::field_slots; 1466 int num_generic_signature = 0; 1467 for (int n = 0; n < length; n++) { 1468 // access_flags, name_index, descriptor_index, attributes_count 1469 cfs->guarantee_more(8, CHECK); 1470 1471 AccessFlags access_flags; 1472 const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; 1473 verify_legal_field_modifiers(flags, is_interface, CHECK); 1474 access_flags.set_flags(flags); 1475 1476 const u2 name_index = cfs->get_u2_fast(); 1477 check_property(valid_symbol_at(name_index), 1478 "Invalid constant pool index %u for field name in class file %s", 1479 name_index, CHECK); 1480 const Symbol* const name = cp->symbol_at(name_index); 1481 verify_legal_field_name(name, CHECK); 1482 1483 const u2 signature_index = cfs->get_u2_fast(); 1484 check_property(valid_symbol_at(signature_index), 1485 "Invalid constant pool index %u for field signature in class file %s", 1486 signature_index, CHECK); 1487 const Symbol* const sig = cp->symbol_at(signature_index); 1488 verify_legal_field_signature(name, sig, CHECK); 1489 1490 u2 constantvalue_index = 0; 1491 bool is_synthetic = false; 1492 u2 generic_signature_index = 0; 1493 const bool is_static = access_flags.is_static(); 1494 FieldAnnotationCollector parsed_annotations(_loader_data); 1495 1496 const u2 attributes_count = cfs->get_u2_fast(); 1497 if (attributes_count > 0) { 1498 parse_field_attributes(cfs, 1499 attributes_count, 1500 is_static, 1501 signature_index, 1502 &constantvalue_index, 1503 &is_synthetic, 1504 &generic_signature_index, 1505 &parsed_annotations, 1506 CHECK); 1507 1508 if (parsed_annotations.field_annotations() != NULL) { 1509 if (_fields_annotations == NULL) { 1510 _fields_annotations = MetadataFactory::new_array<AnnotationArray*>( 1511 _loader_data, length, NULL, 1512 CHECK); 1513 } 1514 _fields_annotations->at_put(n, parsed_annotations.field_annotations()); 1515 parsed_annotations.set_field_annotations(NULL); 1516 } 1517 if (parsed_annotations.field_type_annotations() != NULL) { 1518 if (_fields_type_annotations == NULL) { 1519 _fields_type_annotations = 1520 MetadataFactory::new_array<AnnotationArray*>(_loader_data, 1521 length, 1522 NULL, 1523 CHECK); 1524 } 1525 _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); 1526 parsed_annotations.set_field_type_annotations(NULL); 1527 } 1528 1529 if (is_synthetic) { 1530 access_flags.set_is_synthetic(); 1531 } 1532 if (generic_signature_index != 0) { 1533 access_flags.set_field_has_generic_signature(); 1534 fa[generic_signature_slot] = generic_signature_index; 1535 generic_signature_slot ++; 1536 num_generic_signature ++; 1537 } 1538 } 1539 1540 FieldInfo* const field = FieldInfo::from_field_array(fa, n); 1541 field->initialize(access_flags.as_short(), 1542 name_index, 1543 signature_index, 1544 constantvalue_index); 1545 const BasicType type = cp->basic_type_for_signature_at(signature_index); 1546 1547 // Remember how many oops we encountered and compute allocation type 1548 const FieldAllocationType atype = fac->update(is_static, type); 1549 field->set_allocation_type(atype); 1550 1551 // After field is initialized with type, we can augment it with aux info 1552 if (parsed_annotations.has_any_annotations()) 1553 parsed_annotations.apply_to(field); 1554 } 1555 1556 int index = length; 1557 if (num_injected != 0) { 1558 for (int n = 0; n < num_injected; n++) { 1559 // Check for duplicates 1560 if (injected[n].may_be_java) { 1561 const Symbol* const name = injected[n].name(); 1562 const Symbol* const signature = injected[n].signature(); 1563 bool duplicate = false; 1564 for (int i = 0; i < length; i++) { 1565 const FieldInfo* const f = FieldInfo::from_field_array(fa, i); 1566 if (name == cp->symbol_at(f->name_index()) && 1567 signature == cp->symbol_at(f->signature_index())) { 1568 // Symbol is desclared in Java so skip this one 1569 duplicate = true; 1570 break; 1571 } 1572 } 1573 if (duplicate) { 1574 // These will be removed from the field array at the end 1575 continue; 1576 } 1577 } 1578 1579 // Injected field 1580 FieldInfo* const field = FieldInfo::from_field_array(fa, index); 1581 field->initialize(JVM_ACC_FIELD_INTERNAL, 1582 injected[n].name_index, 1583 injected[n].signature_index, 1584 0); 1585 1586 const BasicType type = FieldType::basic_type(injected[n].signature()); 1587 1588 // Remember how many oops we encountered and compute allocation type 1589 const FieldAllocationType atype = fac->update(false, type); 1590 field->set_allocation_type(atype); 1591 index++; 1592 } 1593 } 1594 1595 assert(NULL == _fields, "invariant"); 1596 1597 _fields = 1598 MetadataFactory::new_array<u2>(_loader_data, 1599 index * FieldInfo::field_slots + num_generic_signature, 1600 CHECK); 1601 // Sometimes injected fields already exist in the Java source so 1602 // the fields array could be too long. In that case the 1603 // fields array is trimed. Also unused slots that were reserved 1604 // for generic signature indexes are discarded. 1605 { 1606 int i = 0; 1607 for (; i < index * FieldInfo::field_slots; i++) { 1608 _fields->at_put(i, fa[i]); 1609 } 1610 for (int j = total_fields * FieldInfo::field_slots; 1611 j < generic_signature_slot; j++) { 1612 _fields->at_put(i++, fa[j]); 1613 } 1614 assert(_fields->length() == i, ""); 1615 } 1616 1617 if (_need_verify && length > 1) { 1618 // Check duplicated fields 1619 ResourceMark rm(THREAD); 1620 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( 1621 THREAD, NameSigHash*, HASH_ROW_SIZE); 1622 initialize_hashtable(names_and_sigs); 1623 bool dup = false; 1624 { 1625 debug_only(NoSafepointVerifier nsv;) 1626 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 1627 const Symbol* const name = fs.name(); 1628 const Symbol* const sig = fs.signature(); 1629 // If no duplicates, add name/signature in hashtable names_and_sigs. 1630 if (!put_after_lookup(name, sig, names_and_sigs)) { 1631 dup = true; 1632 break; 1633 } 1634 } 1635 } 1636 if (dup) { 1637 classfile_parse_error("Duplicate field name&signature in class file %s", 1638 CHECK); 1639 } 1640 } 1641 } 1642 1643 1644 static void copy_u2_with_conversion(u2* dest, const u2* src, int length) { 1645 while (length-- > 0) { 1646 *dest++ = Bytes::get_Java_u2((u1*) (src++)); 1647 } 1648 } 1649 1650 const u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs, 1651 u4 code_length, 1652 u4 exception_table_length, 1653 TRAPS) { 1654 assert(cfs != NULL, "invariant"); 1655 1656 const u2* const exception_table_start = cfs->get_u2_buffer(); 1657 assert(exception_table_start != NULL, "null exception table"); 1658 1659 cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, 1660 // end_pc, 1661 // handler_pc, 1662 // catch_type_index 1663 1664 // Will check legal target after parsing code array in verifier. 1665 if (_need_verify) { 1666 for (unsigned int i = 0; i < exception_table_length; i++) { 1667 const u2 start_pc = cfs->get_u2_fast(); 1668 const u2 end_pc = cfs->get_u2_fast(); 1669 const u2 handler_pc = cfs->get_u2_fast(); 1670 const u2 catch_type_index = cfs->get_u2_fast(); 1671 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), 1672 "Illegal exception table range in class file %s", 1673 CHECK_NULL); 1674 guarantee_property(handler_pc < code_length, 1675 "Illegal exception table handler in class file %s", 1676 CHECK_NULL); 1677 if (catch_type_index != 0) { 1678 guarantee_property(valid_klass_reference_at(catch_type_index), 1679 "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); 1680 } 1681 } 1682 } else { 1683 cfs->skip_u2_fast(exception_table_length * 4); 1684 } 1685 return exception_table_start; 1686 } 1687 1688 void ClassFileParser::parse_linenumber_table(u4 code_attribute_length, 1689 u4 code_length, 1690 CompressedLineNumberWriteStream**const write_stream, 1691 TRAPS) { 1692 1693 const ClassFileStream* const cfs = _stream; 1694 unsigned int num_entries = cfs->get_u2(CHECK); 1695 1696 // Each entry is a u2 start_pc, and a u2 line_number 1697 const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2); 1698 1699 // Verify line number attribute and table length 1700 check_property( 1701 code_attribute_length == sizeof(u2) + length_in_bytes, 1702 "LineNumberTable attribute has wrong length in class file %s", CHECK); 1703 1704 cfs->guarantee_more(length_in_bytes, CHECK); 1705 1706 if ((*write_stream) == NULL) { 1707 if (length_in_bytes > fixed_buffer_size) { 1708 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); 1709 } else { 1710 (*write_stream) = new CompressedLineNumberWriteStream( 1711 _linenumbertable_buffer, fixed_buffer_size); 1712 } 1713 } 1714 1715 while (num_entries-- > 0) { 1716 const u2 bci = cfs->get_u2_fast(); // start_pc 1717 const u2 line = cfs->get_u2_fast(); // line_number 1718 guarantee_property(bci < code_length, 1719 "Invalid pc in LineNumberTable in class file %s", CHECK); 1720 (*write_stream)->write_pair(bci, line); 1721 } 1722 } 1723 1724 1725 class LVT_Hash : public AllStatic { 1726 public: 1727 1728 static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) { 1729 /* 1730 * 3-tuple start_bci/length/slot has to be unique key, 1731 * so the following comparison seems to be redundant: 1732 * && elem->name_cp_index == entry->_elem->name_cp_index 1733 */ 1734 return (e0.start_bci == e1.start_bci && 1735 e0.length == e1.length && 1736 e0.name_cp_index == e1.name_cp_index && 1737 e0.slot == e1.slot); 1738 } 1739 1740 static unsigned int hash(LocalVariableTableElement const& e0) { 1741 unsigned int raw_hash = e0.start_bci; 1742 1743 raw_hash = e0.length + raw_hash * 37; 1744 raw_hash = e0.name_cp_index + raw_hash * 37; 1745 raw_hash = e0.slot + raw_hash * 37; 1746 1747 return raw_hash; 1748 } 1749 }; 1750 1751 1752 // Class file LocalVariableTable elements. 1753 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { 1754 public: 1755 u2 start_bci; 1756 u2 length; 1757 u2 name_cp_index; 1758 u2 descriptor_cp_index; 1759 u2 slot; 1760 }; 1761 1762 static void copy_lvt_element(const Classfile_LVT_Element* const src, 1763 LocalVariableTableElement* const lvt) { 1764 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); 1765 lvt->length = Bytes::get_Java_u2((u1*) &src->length); 1766 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); 1767 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); 1768 lvt->signature_cp_index = 0; 1769 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); 1770 } 1771 1772 // Function is used to parse both attributes: 1773 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) 1774 const u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs, 1775 u4 code_length, 1776 u2 max_locals, 1777 u4 code_attribute_length, 1778 u2* const localvariable_table_length, 1779 bool isLVTT, 1780 TRAPS) { 1781 const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; 1782 *localvariable_table_length = cfs->get_u2(CHECK_NULL); 1783 const unsigned int size = 1784 (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); 1785 1786 const ConstantPool* const cp = _cp; 1787 1788 // Verify local variable table attribute has right length 1789 if (_need_verify) { 1790 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), 1791 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); 1792 } 1793 1794 const u2* const localvariable_table_start = cfs->get_u2_buffer(); 1795 assert(localvariable_table_start != NULL, "null local variable table"); 1796 if (!_need_verify) { 1797 cfs->skip_u2_fast(size); 1798 } else { 1799 cfs->guarantee_more(size * 2, CHECK_NULL); 1800 for(int i = 0; i < (*localvariable_table_length); i++) { 1801 const u2 start_pc = cfs->get_u2_fast(); 1802 const u2 length = cfs->get_u2_fast(); 1803 const u2 name_index = cfs->get_u2_fast(); 1804 const u2 descriptor_index = cfs->get_u2_fast(); 1805 const u2 index = cfs->get_u2_fast(); 1806 // Assign to a u4 to avoid overflow 1807 const u4 end_pc = (u4)start_pc + (u4)length; 1808 1809 if (start_pc >= code_length) { 1810 classfile_parse_error( 1811 "Invalid start_pc %u in %s in class file %s", 1812 start_pc, tbl_name, CHECK_NULL); 1813 } 1814 if (end_pc > code_length) { 1815 classfile_parse_error( 1816 "Invalid length %u in %s in class file %s", 1817 length, tbl_name, CHECK_NULL); 1818 } 1819 const int cp_size = cp->length(); 1820 guarantee_property(valid_symbol_at(name_index), 1821 "Name index %u in %s has bad constant type in class file %s", 1822 name_index, tbl_name, CHECK_NULL); 1823 guarantee_property(valid_symbol_at(descriptor_index), 1824 "Signature index %u in %s has bad constant type in class file %s", 1825 descriptor_index, tbl_name, CHECK_NULL); 1826 1827 const Symbol* const name = cp->symbol_at(name_index); 1828 const Symbol* const sig = cp->symbol_at(descriptor_index); 1829 verify_legal_field_name(name, CHECK_NULL); 1830 u2 extra_slot = 0; 1831 if (!isLVTT) { 1832 verify_legal_field_signature(name, sig, CHECK_NULL); 1833 1834 // 4894874: check special cases for double and long local variables 1835 if (sig == vmSymbols::type_signature(T_DOUBLE) || 1836 sig == vmSymbols::type_signature(T_LONG)) { 1837 extra_slot = 1; 1838 } 1839 } 1840 guarantee_property((index + extra_slot) < max_locals, 1841 "Invalid index %u in %s in class file %s", 1842 index, tbl_name, CHECK_NULL); 1843 } 1844 } 1845 return localvariable_table_start; 1846 } 1847 1848 1849 void ClassFileParser::parse_type_array(u2 array_length, 1850 u4 code_length, 1851 u4* const u1_index, 1852 u4* const u2_index, 1853 u1* const u1_array, 1854 u2* const u2_array, 1855 TRAPS) { 1856 const ClassFileStream* const cfs = _stream; 1857 u2 index = 0; // index in the array with long/double occupying two slots 1858 u4 i1 = *u1_index; 1859 u4 i2 = *u2_index + 1; 1860 for(int i = 0; i < array_length; i++) { 1861 const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); 1862 index++; 1863 if (tag == ITEM_Long || tag == ITEM_Double) { 1864 index++; 1865 } else if (tag == ITEM_Object) { 1866 const u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); 1867 guarantee_property(valid_klass_reference_at(class_index), 1868 "Bad class index %u in StackMap in class file %s", 1869 class_index, CHECK); 1870 } else if (tag == ITEM_Uninitialized) { 1871 const u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); 1872 guarantee_property( 1873 offset < code_length, 1874 "Bad uninitialized type offset %u in StackMap in class file %s", 1875 offset, CHECK); 1876 } else { 1877 guarantee_property( 1878 tag <= (u1)ITEM_Uninitialized, 1879 "Unknown variable type %u in StackMap in class file %s", 1880 tag, CHECK); 1881 } 1882 } 1883 u2_array[*u2_index] = index; 1884 *u1_index = i1; 1885 *u2_index = i2; 1886 } 1887 1888 static const u1* parse_stackmap_table(const ClassFileStream* const cfs, 1889 u4 code_attribute_length, 1890 bool need_verify, 1891 TRAPS) { 1892 assert(cfs != NULL, "invariant"); 1893 1894 if (0 == code_attribute_length) { 1895 return NULL; 1896 } 1897 1898 const u1* const stackmap_table_start = cfs->get_u1_buffer(); 1899 assert(stackmap_table_start != NULL, "null stackmap table"); 1900 1901 // check code_attribute_length first 1902 cfs->skip_u1(code_attribute_length, CHECK_NULL); 1903 1904 if (!need_verify && !DumpSharedSpaces) { 1905 return NULL; 1906 } 1907 return stackmap_table_start; 1908 } 1909 1910 const u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs, 1911 u2* const checked_exceptions_length, 1912 u4 method_attribute_length, 1913 TRAPS) { 1914 assert(cfs != NULL, "invariant"); 1915 assert(checked_exceptions_length != NULL, "invariant"); 1916 1917 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length 1918 *checked_exceptions_length = cfs->get_u2_fast(); 1919 const unsigned int size = 1920 (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); 1921 const u2* const checked_exceptions_start = cfs->get_u2_buffer(); 1922 assert(checked_exceptions_start != NULL, "null checked exceptions"); 1923 if (!_need_verify) { 1924 cfs->skip_u2_fast(size); 1925 } else { 1926 // Verify each value in the checked exception table 1927 u2 checked_exception; 1928 const u2 len = *checked_exceptions_length; 1929 cfs->guarantee_more(2 * len, CHECK_NULL); 1930 for (int i = 0; i < len; i++) { 1931 checked_exception = cfs->get_u2_fast(); 1932 check_property( 1933 valid_klass_reference_at(checked_exception), 1934 "Exception name has bad type at constant pool %u in class file %s", 1935 checked_exception, CHECK_NULL); 1936 } 1937 } 1938 // check exceptions attribute length 1939 if (_need_verify) { 1940 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + 1941 sizeof(u2) * size), 1942 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); 1943 } 1944 return checked_exceptions_start; 1945 } 1946 1947 void ClassFileParser::throwIllegalSignature(const char* type, 1948 const Symbol* name, 1949 const Symbol* sig, 1950 TRAPS) const { 1951 assert(name != NULL, "invariant"); 1952 assert(sig != NULL, "invariant"); 1953 1954 ResourceMark rm(THREAD); 1955 Exceptions::fthrow(THREAD_AND_LOCATION, 1956 vmSymbols::java_lang_ClassFormatError(), 1957 "%s \"%s\" in class %s has illegal signature \"%s\"", type, 1958 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); 1959 } 1960 1961 AnnotationCollector::ID 1962 AnnotationCollector::annotation_index(const ClassLoaderData* loader_data, 1963 const Symbol* name) { 1964 const vmSymbols::SID sid = vmSymbols::find_sid(name); 1965 // Privileged code can use all annotations. Other code silently drops some. 1966 const bool privileged = loader_data->is_the_null_class_loader_data() || 1967 loader_data->is_platform_class_loader_data() || 1968 loader_data->is_anonymous(); 1969 switch (sid) { 1970 case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): { 1971 if (_location != _in_method) break; // only allow for methods 1972 if (!privileged) break; // only allow in privileged code 1973 return _method_CallerSensitive; 1974 } 1975 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ForceInline_signature): { 1976 if (_location != _in_method) break; // only allow for methods 1977 if (!privileged) break; // only allow in privileged code 1978 return _method_ForceInline; 1979 } 1980 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_DontInline_signature): { 1981 if (_location != _in_method) break; // only allow for methods 1982 if (!privileged) break; // only allow in privileged code 1983 return _method_DontInline; 1984 } 1985 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InjectedProfile_signature): { 1986 if (_location != _in_method) break; // only allow for methods 1987 if (!privileged) break; // only allow in privileged code 1988 return _method_InjectedProfile; 1989 } 1990 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): { 1991 if (_location != _in_method) break; // only allow for methods 1992 if (!privileged) break; // only allow in privileged code 1993 return _method_LambdaForm_Compiled; 1994 } 1995 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): { 1996 if (_location != _in_method) break; // only allow for methods 1997 if (!privileged) break; // only allow in privileged code 1998 return _method_LambdaForm_Hidden; 1999 } 2000 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_HotSpotIntrinsicCandidate_signature): { 2001 if (_location != _in_method) break; // only allow for methods 2002 if (!privileged) break; // only allow in privileged code 2003 return _method_HotSpotIntrinsicCandidate; 2004 } 2005 #if INCLUDE_JVMCI 2006 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_vm_ci_hotspot_Stable_signature): { 2007 if (_location != _in_field) break; // only allow for fields 2008 if (!privileged) break; // only allow in privileged code 2009 return _field_Stable; 2010 } 2011 #endif 2012 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Stable_signature): { 2013 if (_location != _in_field) break; // only allow for fields 2014 if (!privileged) break; // only allow in privileged code 2015 return _field_Stable; 2016 } 2017 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_Contended_signature): { 2018 if (_location != _in_field && _location != _in_class) { 2019 break; // only allow for fields and classes 2020 } 2021 if (!EnableContended || (RestrictContended && !privileged)) { 2022 break; // honor privileges 2023 } 2024 return _jdk_internal_vm_annotation_Contended; 2025 } 2026 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): { 2027 if (_location != _in_method) break; // only allow for methods 2028 if (RestrictReservedStack && !privileged) break; // honor privileges 2029 return _jdk_internal_vm_annotation_ReservedStackAccess; 2030 } 2031 default: { 2032 break; 2033 } 2034 } 2035 return AnnotationCollector::_unknown; 2036 } 2037 2038 void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { 2039 if (is_contended()) 2040 f->set_contended_group(contended_group()); 2041 if (is_stable()) 2042 f->set_stable(true); 2043 } 2044 2045 ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { 2046 // If there's an error deallocate metadata for field annotations 2047 MetadataFactory::free_array<u1>(_loader_data, _field_annotations); 2048 MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations); 2049 } 2050 2051 void MethodAnnotationCollector::apply_to(methodHandle m) { 2052 if (has_annotation(_method_CallerSensitive)) 2053 m->set_caller_sensitive(true); 2054 if (has_annotation(_method_ForceInline)) 2055 m->set_force_inline(true); 2056 if (has_annotation(_method_DontInline)) 2057 m->set_dont_inline(true); 2058 if (has_annotation(_method_InjectedProfile)) 2059 m->set_has_injected_profile(true); 2060 if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) 2061 m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); 2062 if (has_annotation(_method_LambdaForm_Hidden)) 2063 m->set_hidden(true); 2064 if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic()) 2065 m->set_intrinsic_candidate(true); 2066 if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess)) 2067 m->set_has_reserved_stack_access(true); 2068 } 2069 2070 void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) { 2071 assert(ik != NULL, "invariant"); 2072 ik->set_is_contended(is_contended()); 2073 } 2074 2075 #define MAX_ARGS_SIZE 255 2076 #define MAX_CODE_SIZE 65535 2077 #define INITIAL_MAX_LVT_NUMBER 256 2078 2079 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. 2080 * 2081 * Rules for LVT's and LVTT's are: 2082 * - There can be any number of LVT's and LVTT's. 2083 * - If there are n LVT's, it is the same as if there was just 2084 * one LVT containing all the entries from the n LVT's. 2085 * - There may be no more than one LVT entry per local variable. 2086 * Two LVT entries are 'equal' if these fields are the same: 2087 * start_pc, length, name, slot 2088 * - There may be no more than one LVTT entry per each LVT entry. 2089 * Each LVTT entry has to match some LVT entry. 2090 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. 2091 */ 2092 void ClassFileParser::copy_localvariable_table(const ConstMethod* cm, 2093 int lvt_cnt, 2094 u2* const localvariable_table_length, 2095 const u2**const localvariable_table_start, 2096 int lvtt_cnt, 2097 u2* const localvariable_type_table_length, 2098 const u2**const localvariable_type_table_start, 2099 TRAPS) { 2100 2101 ResourceMark rm(THREAD); 2102 2103 typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*, 2104 &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable; 2105 2106 LVT_HashTable* const table = new LVT_HashTable(); 2107 2108 // To fill LocalVariableTable in 2109 const Classfile_LVT_Element* cf_lvt; 2110 LocalVariableTableElement* lvt = cm->localvariable_table_start(); 2111 2112 for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { 2113 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; 2114 for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { 2115 copy_lvt_element(&cf_lvt[idx], lvt); 2116 // If no duplicates, add LVT elem in hashtable. 2117 if (table->put(*lvt, lvt) == false 2118 && _need_verify 2119 && _major_version >= JAVA_1_5_VERSION) { 2120 classfile_parse_error("Duplicated LocalVariableTable attribute " 2121 "entry for '%s' in class file %s", 2122 _cp->symbol_at(lvt->name_cp_index)->as_utf8(), 2123 CHECK); 2124 } 2125 } 2126 } 2127 2128 // To merge LocalVariableTable and LocalVariableTypeTable 2129 const Classfile_LVT_Element* cf_lvtt; 2130 LocalVariableTableElement lvtt_elem; 2131 2132 for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { 2133 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; 2134 for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { 2135 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); 2136 LocalVariableTableElement** entry = table->get(lvtt_elem); 2137 if (entry == NULL) { 2138 if (_need_verify) { 2139 classfile_parse_error("LVTT entry for '%s' in class file %s " 2140 "does not match any LVT entry", 2141 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2142 CHECK); 2143 } 2144 } else if ((*entry)->signature_cp_index != 0 && _need_verify) { 2145 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " 2146 "entry for '%s' in class file %s", 2147 _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), 2148 CHECK); 2149 } else { 2150 // to add generic signatures into LocalVariableTable 2151 (*entry)->signature_cp_index = lvtt_elem.descriptor_cp_index; 2152 } 2153 } 2154 } 2155 } 2156 2157 2158 void ClassFileParser::copy_method_annotations(ConstMethod* cm, 2159 const u1* runtime_visible_annotations, 2160 int runtime_visible_annotations_length, 2161 const u1* runtime_invisible_annotations, 2162 int runtime_invisible_annotations_length, 2163 const u1* runtime_visible_parameter_annotations, 2164 int runtime_visible_parameter_annotations_length, 2165 const u1* runtime_invisible_parameter_annotations, 2166 int runtime_invisible_parameter_annotations_length, 2167 const u1* runtime_visible_type_annotations, 2168 int runtime_visible_type_annotations_length, 2169 const u1* runtime_invisible_type_annotations, 2170 int runtime_invisible_type_annotations_length, 2171 const u1* annotation_default, 2172 int annotation_default_length, 2173 TRAPS) { 2174 2175 AnnotationArray* a; 2176 2177 if (runtime_visible_annotations_length + 2178 runtime_invisible_annotations_length > 0) { 2179 a = assemble_annotations(runtime_visible_annotations, 2180 runtime_visible_annotations_length, 2181 runtime_invisible_annotations, 2182 runtime_invisible_annotations_length, 2183 CHECK); 2184 cm->set_method_annotations(a); 2185 } 2186 2187 if (runtime_visible_parameter_annotations_length + 2188 runtime_invisible_parameter_annotations_length > 0) { 2189 a = assemble_annotations(runtime_visible_parameter_annotations, 2190 runtime_visible_parameter_annotations_length, 2191 runtime_invisible_parameter_annotations, 2192 runtime_invisible_parameter_annotations_length, 2193 CHECK); 2194 cm->set_parameter_annotations(a); 2195 } 2196 2197 if (annotation_default_length > 0) { 2198 a = assemble_annotations(annotation_default, 2199 annotation_default_length, 2200 NULL, 2201 0, 2202 CHECK); 2203 cm->set_default_annotations(a); 2204 } 2205 2206 if (runtime_visible_type_annotations_length + 2207 runtime_invisible_type_annotations_length > 0) { 2208 a = assemble_annotations(runtime_visible_type_annotations, 2209 runtime_visible_type_annotations_length, 2210 runtime_invisible_type_annotations, 2211 runtime_invisible_type_annotations_length, 2212 CHECK); 2213 cm->set_type_annotations(a); 2214 } 2215 } 2216 2217 2218 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions 2219 // attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the 2220 // Method* to save footprint, so we only know the size of the resulting Method* when the 2221 // entire method attribute is parsed. 2222 // 2223 // The promoted_flags parameter is used to pass relevant access_flags 2224 // from the method back up to the containing klass. These flag values 2225 // are added to klass's access_flags. 2226 2227 Method* ClassFileParser::parse_method(const ClassFileStream* const cfs, 2228 bool is_interface, 2229 const ConstantPool* cp, 2230 AccessFlags* const promoted_flags, 2231 TRAPS) { 2232 assert(cfs != NULL, "invariant"); 2233 assert(cp != NULL, "invariant"); 2234 assert(promoted_flags != NULL, "invariant"); 2235 2236 ResourceMark rm(THREAD); 2237 // Parse fixed parts: 2238 // access_flags, name_index, descriptor_index, attributes_count 2239 cfs->guarantee_more(8, CHECK_NULL); 2240 2241 int flags = cfs->get_u2_fast(); 2242 const u2 name_index = cfs->get_u2_fast(); 2243 const int cp_size = cp->length(); 2244 check_property( 2245 valid_symbol_at(name_index), 2246 "Illegal constant pool index %u for method name in class file %s", 2247 name_index, CHECK_NULL); 2248 const Symbol* const name = cp->symbol_at(name_index); 2249 verify_legal_method_name(name, CHECK_NULL); 2250 2251 const u2 signature_index = cfs->get_u2_fast(); 2252 guarantee_property( 2253 valid_symbol_at(signature_index), 2254 "Illegal constant pool index %u for method signature in class file %s", 2255 signature_index, CHECK_NULL); 2256 const Symbol* const signature = cp->symbol_at(signature_index); 2257 2258 if (name == vmSymbols::class_initializer_name()) { 2259 // We ignore the other access flags for a valid class initializer. 2260 // (JVM Spec 2nd ed., chapter 4.6) 2261 if (_major_version < 51) { // backward compatibility 2262 flags = JVM_ACC_STATIC; 2263 } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { 2264 flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; 2265 } else { 2266 classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL); 2267 } 2268 } else { 2269 verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL); 2270 } 2271 2272 if (name == vmSymbols::object_initializer_name() && is_interface) { 2273 classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL); 2274 } 2275 2276 int args_size = -1; // only used when _need_verify is true 2277 if (_need_verify) { 2278 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + 2279 verify_legal_method_signature(name, signature, CHECK_NULL); 2280 if (args_size > MAX_ARGS_SIZE) { 2281 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL); 2282 } 2283 } 2284 2285 AccessFlags access_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); 2286 2287 // Default values for code and exceptions attribute elements 2288 u2 max_stack = 0; 2289 u2 max_locals = 0; 2290 u4 code_length = 0; 2291 const u1* code_start = 0; 2292 u2 exception_table_length = 0; 2293 const u2* exception_table_start = NULL; 2294 Array<int>* exception_handlers = Universe::the_empty_int_array(); 2295 u2 checked_exceptions_length = 0; 2296 const u2* checked_exceptions_start = NULL; 2297 CompressedLineNumberWriteStream* linenumber_table = NULL; 2298 int linenumber_table_length = 0; 2299 int total_lvt_length = 0; 2300 u2 lvt_cnt = 0; 2301 u2 lvtt_cnt = 0; 2302 bool lvt_allocated = false; 2303 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; 2304 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; 2305 u2* localvariable_table_length = NULL; 2306 const u2** localvariable_table_start = NULL; 2307 u2* localvariable_type_table_length = NULL; 2308 const u2** localvariable_type_table_start = NULL; 2309 int method_parameters_length = -1; 2310 const u1* method_parameters_data = NULL; 2311 bool method_parameters_seen = false; 2312 bool parsed_code_attribute = false; 2313 bool parsed_checked_exceptions_attribute = false; 2314 bool parsed_stackmap_attribute = false; 2315 // stackmap attribute - JDK1.5 2316 const u1* stackmap_data = NULL; 2317 int stackmap_data_length = 0; 2318 u2 generic_signature_index = 0; 2319 MethodAnnotationCollector parsed_annotations; 2320 const u1* runtime_visible_annotations = NULL; 2321 int runtime_visible_annotations_length = 0; 2322 const u1* runtime_invisible_annotations = NULL; 2323 int runtime_invisible_annotations_length = 0; 2324 const u1* runtime_visible_parameter_annotations = NULL; 2325 int runtime_visible_parameter_annotations_length = 0; 2326 const u1* runtime_invisible_parameter_annotations = NULL; 2327 int runtime_invisible_parameter_annotations_length = 0; 2328 const u1* runtime_visible_type_annotations = NULL; 2329 int runtime_visible_type_annotations_length = 0; 2330 const u1* runtime_invisible_type_annotations = NULL; 2331 int runtime_invisible_type_annotations_length = 0; 2332 bool runtime_invisible_annotations_exists = false; 2333 bool runtime_invisible_type_annotations_exists = false; 2334 bool runtime_invisible_parameter_annotations_exists = false; 2335 const u1* annotation_default = NULL; 2336 int annotation_default_length = 0; 2337 2338 // Parse code and exceptions attribute 2339 u2 method_attributes_count = cfs->get_u2_fast(); 2340 while (method_attributes_count--) { 2341 cfs->guarantee_more(6, CHECK_NULL); // method_attribute_name_index, method_attribute_length 2342 const u2 method_attribute_name_index = cfs->get_u2_fast(); 2343 const u4 method_attribute_length = cfs->get_u4_fast(); 2344 check_property( 2345 valid_symbol_at(method_attribute_name_index), 2346 "Invalid method attribute name index %u in class file %s", 2347 method_attribute_name_index, CHECK_NULL); 2348 2349 const Symbol* const method_attribute_name = cp->symbol_at(method_attribute_name_index); 2350 if (method_attribute_name == vmSymbols::tag_code()) { 2351 // Parse Code attribute 2352 if (_need_verify) { 2353 guarantee_property( 2354 !access_flags.is_native() && !access_flags.is_abstract(), 2355 "Code attribute in native or abstract methods in class file %s", 2356 CHECK_NULL); 2357 } 2358 if (parsed_code_attribute) { 2359 classfile_parse_error("Multiple Code attributes in class file %s", 2360 CHECK_NULL); 2361 } 2362 parsed_code_attribute = true; 2363 2364 // Stack size, locals size, and code size 2365 if (_major_version == 45 && _minor_version <= 2) { 2366 cfs->guarantee_more(4, CHECK_NULL); 2367 max_stack = cfs->get_u1_fast(); 2368 max_locals = cfs->get_u1_fast(); 2369 code_length = cfs->get_u2_fast(); 2370 } else { 2371 cfs->guarantee_more(8, CHECK_NULL); 2372 max_stack = cfs->get_u2_fast(); 2373 max_locals = cfs->get_u2_fast(); 2374 code_length = cfs->get_u4_fast(); 2375 } 2376 if (_need_verify) { 2377 guarantee_property(args_size <= max_locals, 2378 "Arguments can't fit into locals in class file %s", 2379 CHECK_NULL); 2380 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, 2381 "Invalid method Code length %u in class file %s", 2382 code_length, CHECK_NULL); 2383 } 2384 // Code pointer 2385 code_start = cfs->get_u1_buffer(); 2386 assert(code_start != NULL, "null code start"); 2387 cfs->guarantee_more(code_length, CHECK_NULL); 2388 cfs->skip_u1_fast(code_length); 2389 2390 // Exception handler table 2391 cfs->guarantee_more(2, CHECK_NULL); // exception_table_length 2392 exception_table_length = cfs->get_u2_fast(); 2393 if (exception_table_length > 0) { 2394 exception_table_start = parse_exception_table(cfs, 2395 code_length, 2396 exception_table_length, 2397 CHECK_NULL); 2398 } 2399 2400 // Parse additional attributes in code attribute 2401 cfs->guarantee_more(2, CHECK_NULL); // code_attributes_count 2402 u2 code_attributes_count = cfs->get_u2_fast(); 2403 2404 unsigned int calculated_attribute_length = 0; 2405 2406 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { 2407 calculated_attribute_length = 2408 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); 2409 } else { 2410 // max_stack, locals and length are smaller in pre-version 45.2 classes 2411 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); 2412 } 2413 calculated_attribute_length += 2414 code_length + 2415 sizeof(exception_table_length) + 2416 sizeof(code_attributes_count) + 2417 exception_table_length * 2418 ( sizeof(u2) + // start_pc 2419 sizeof(u2) + // end_pc 2420 sizeof(u2) + // handler_pc 2421 sizeof(u2) ); // catch_type_index 2422 2423 while (code_attributes_count--) { 2424 cfs->guarantee_more(6, CHECK_NULL); // code_attribute_name_index, code_attribute_length 2425 const u2 code_attribute_name_index = cfs->get_u2_fast(); 2426 const u4 code_attribute_length = cfs->get_u4_fast(); 2427 calculated_attribute_length += code_attribute_length + 2428 sizeof(code_attribute_name_index) + 2429 sizeof(code_attribute_length); 2430 check_property(valid_symbol_at(code_attribute_name_index), 2431 "Invalid code attribute name index %u in class file %s", 2432 code_attribute_name_index, 2433 CHECK_NULL); 2434 if (LoadLineNumberTables && 2435 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { 2436 // Parse and compress line number table 2437 parse_linenumber_table(code_attribute_length, 2438 code_length, 2439 &linenumber_table, 2440 CHECK_NULL); 2441 2442 } else if (LoadLocalVariableTables && 2443 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { 2444 // Parse local variable table 2445 if (!lvt_allocated) { 2446 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2447 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2448 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2449 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2450 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2451 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2452 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2453 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2454 lvt_allocated = true; 2455 } 2456 if (lvt_cnt == max_lvt_cnt) { 2457 max_lvt_cnt <<= 1; 2458 localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); 2459 localvariable_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); 2460 } 2461 localvariable_table_start[lvt_cnt] = 2462 parse_localvariable_table(cfs, 2463 code_length, 2464 max_locals, 2465 code_attribute_length, 2466 &localvariable_table_length[lvt_cnt], 2467 false, // is not LVTT 2468 CHECK_NULL); 2469 total_lvt_length += localvariable_table_length[lvt_cnt]; 2470 lvt_cnt++; 2471 } else if (LoadLocalVariableTypeTables && 2472 _major_version >= JAVA_1_5_VERSION && 2473 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { 2474 if (!lvt_allocated) { 2475 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2476 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2477 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2478 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2479 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( 2480 THREAD, u2, INITIAL_MAX_LVT_NUMBER); 2481 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( 2482 THREAD, const u2*, INITIAL_MAX_LVT_NUMBER); 2483 lvt_allocated = true; 2484 } 2485 // Parse local variable type table 2486 if (lvtt_cnt == max_lvtt_cnt) { 2487 max_lvtt_cnt <<= 1; 2488 localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); 2489 localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(const u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); 2490 } 2491 localvariable_type_table_start[lvtt_cnt] = 2492 parse_localvariable_table(cfs, 2493 code_length, 2494 max_locals, 2495 code_attribute_length, 2496 &localvariable_type_table_length[lvtt_cnt], 2497 true, // is LVTT 2498 CHECK_NULL); 2499 lvtt_cnt++; 2500 } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && 2501 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { 2502 // Stack map is only needed by the new verifier in JDK1.5. 2503 if (parsed_stackmap_attribute) { 2504 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_NULL); 2505 } 2506 stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL); 2507 stackmap_data_length = code_attribute_length; 2508 parsed_stackmap_attribute = true; 2509 } else { 2510 // Skip unknown attributes 2511 cfs->skip_u1(code_attribute_length, CHECK_NULL); 2512 } 2513 } 2514 // check method attribute length 2515 if (_need_verify) { 2516 guarantee_property(method_attribute_length == calculated_attribute_length, 2517 "Code segment has wrong length in class file %s", 2518 CHECK_NULL); 2519 } 2520 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { 2521 // Parse Exceptions attribute 2522 if (parsed_checked_exceptions_attribute) { 2523 classfile_parse_error("Multiple Exceptions attributes in class file %s", 2524 CHECK_NULL); 2525 } 2526 parsed_checked_exceptions_attribute = true; 2527 checked_exceptions_start = 2528 parse_checked_exceptions(cfs, 2529 &checked_exceptions_length, 2530 method_attribute_length, 2531 CHECK_NULL); 2532 } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { 2533 // reject multiple method parameters 2534 if (method_parameters_seen) { 2535 classfile_parse_error("Multiple MethodParameters attributes in class file %s", 2536 CHECK_NULL); 2537 } 2538 method_parameters_seen = true; 2539 method_parameters_length = cfs->get_u1_fast(); 2540 const u2 real_length = (method_parameters_length * 4u) + 1u; 2541 if (method_attribute_length != real_length) { 2542 classfile_parse_error( 2543 "Invalid MethodParameters method attribute length %u in class file", 2544 method_attribute_length, CHECK_NULL); 2545 } 2546 method_parameters_data = cfs->get_u1_buffer(); 2547 cfs->skip_u2_fast(method_parameters_length); 2548 cfs->skip_u2_fast(method_parameters_length); 2549 // ignore this attribute if it cannot be reflected 2550 if (!SystemDictionary::Parameter_klass_loaded()) 2551 method_parameters_length = -1; 2552 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { 2553 if (method_attribute_length != 0) { 2554 classfile_parse_error( 2555 "Invalid Synthetic method attribute length %u in class file %s", 2556 method_attribute_length, CHECK_NULL); 2557 } 2558 // Should we check that there hasn't already been a synthetic attribute? 2559 access_flags.set_is_synthetic(); 2560 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 2561 if (method_attribute_length != 0) { 2562 classfile_parse_error( 2563 "Invalid Deprecated method attribute length %u in class file %s", 2564 method_attribute_length, CHECK_NULL); 2565 } 2566 } else if (_major_version >= JAVA_1_5_VERSION) { 2567 if (method_attribute_name == vmSymbols::tag_signature()) { 2568 if (method_attribute_length != 2) { 2569 classfile_parse_error( 2570 "Invalid Signature attribute length %u in class file %s", 2571 method_attribute_length, CHECK_NULL); 2572 } 2573 generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL); 2574 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { 2575 if (runtime_visible_annotations != NULL) { 2576 classfile_parse_error( 2577 "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", 2578 CHECK_NULL); 2579 } 2580 runtime_visible_annotations_length = method_attribute_length; 2581 runtime_visible_annotations = cfs->get_u1_buffer(); 2582 assert(runtime_visible_annotations != NULL, "null visible annotations"); 2583 parse_annotations(cp, 2584 runtime_visible_annotations, 2585 runtime_visible_annotations_length, 2586 &parsed_annotations, 2587 _loader_data, 2588 CHECK_NULL); 2589 cfs->skip_u1(runtime_visible_annotations_length, CHECK_NULL); 2590 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { 2591 if (runtime_invisible_annotations_exists) { 2592 classfile_parse_error( 2593 "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", 2594 CHECK_NULL); 2595 } 2596 runtime_invisible_annotations_exists = true; 2597 if (PreserveAllAnnotations) { 2598 runtime_invisible_annotations_length = method_attribute_length; 2599 runtime_invisible_annotations = cfs->get_u1_buffer(); 2600 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); 2601 } 2602 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2603 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { 2604 if (runtime_visible_parameter_annotations != NULL) { 2605 classfile_parse_error( 2606 "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", 2607 CHECK_NULL); 2608 } 2609 runtime_visible_parameter_annotations_length = method_attribute_length; 2610 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); 2611 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); 2612 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL); 2613 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { 2614 if (runtime_invisible_parameter_annotations_exists) { 2615 classfile_parse_error( 2616 "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", 2617 CHECK_NULL); 2618 } 2619 runtime_invisible_parameter_annotations_exists = true; 2620 if (PreserveAllAnnotations) { 2621 runtime_invisible_parameter_annotations_length = method_attribute_length; 2622 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); 2623 assert(runtime_invisible_parameter_annotations != NULL, 2624 "null invisible parameter annotations"); 2625 } 2626 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2627 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { 2628 if (annotation_default != NULL) { 2629 classfile_parse_error( 2630 "Multiple AnnotationDefault attributes for method in class file %s", 2631 CHECK_NULL); 2632 } 2633 annotation_default_length = method_attribute_length; 2634 annotation_default = cfs->get_u1_buffer(); 2635 assert(annotation_default != NULL, "null annotation default"); 2636 cfs->skip_u1(annotation_default_length, CHECK_NULL); 2637 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { 2638 if (runtime_visible_type_annotations != NULL) { 2639 classfile_parse_error( 2640 "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", 2641 CHECK_NULL); 2642 } 2643 runtime_visible_type_annotations_length = method_attribute_length; 2644 runtime_visible_type_annotations = cfs->get_u1_buffer(); 2645 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 2646 // No need for the VM to parse Type annotations 2647 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_NULL); 2648 } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { 2649 if (runtime_invisible_type_annotations_exists) { 2650 classfile_parse_error( 2651 "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", 2652 CHECK_NULL); 2653 } else { 2654 runtime_invisible_type_annotations_exists = true; 2655 } 2656 if (PreserveAllAnnotations) { 2657 runtime_invisible_type_annotations_length = method_attribute_length; 2658 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 2659 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 2660 } 2661 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2662 } else { 2663 // Skip unknown attributes 2664 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2665 } 2666 } else { 2667 // Skip unknown attributes 2668 cfs->skip_u1(method_attribute_length, CHECK_NULL); 2669 } 2670 } 2671 2672 if (linenumber_table != NULL) { 2673 linenumber_table->write_terminator(); 2674 linenumber_table_length = linenumber_table->position(); 2675 } 2676 2677 // Make sure there's at least one Code attribute in non-native/non-abstract method 2678 if (_need_verify) { 2679 guarantee_property(access_flags.is_native() || 2680 access_flags.is_abstract() || 2681 parsed_code_attribute, 2682 "Absent Code attribute in method that is not native or abstract in class file %s", 2683 CHECK_NULL); 2684 } 2685 2686 // All sizing information for a Method* is finally available, now create it 2687 InlineTableSizes sizes( 2688 total_lvt_length, 2689 linenumber_table_length, 2690 exception_table_length, 2691 checked_exceptions_length, 2692 method_parameters_length, 2693 generic_signature_index, 2694 runtime_visible_annotations_length + 2695 runtime_invisible_annotations_length, 2696 runtime_visible_parameter_annotations_length + 2697 runtime_invisible_parameter_annotations_length, 2698 runtime_visible_type_annotations_length + 2699 runtime_invisible_type_annotations_length, 2700 annotation_default_length, 2701 0); 2702 2703 Method* const m = Method::allocate(_loader_data, 2704 code_length, 2705 access_flags, 2706 &sizes, 2707 ConstMethod::NORMAL, 2708 CHECK_NULL); 2709 2710 ClassLoadingService::add_class_method_size(m->size()*wordSize); 2711 2712 // Fill in information from fixed part (access_flags already set) 2713 m->set_constants(_cp); 2714 m->set_name_index(name_index); 2715 m->set_signature_index(signature_index); 2716 #ifdef CC_INTERP 2717 // hmm is there a gc issue here?? 2718 ResultTypeFinder rtf(cp->symbol_at(signature_index)); 2719 m->set_result_index(rtf.type()); 2720 #endif 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 parsed_bootstrap_methods_attribute = true; 3343 parse_classfile_bootstrap_methods_attribute(cfs, cp, attribute_length, CHECK); 3344 } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { 3345 if (runtime_visible_type_annotations != NULL) { 3346 classfile_parse_error( 3347 "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); 3348 } 3349 runtime_visible_type_annotations_length = attribute_length; 3350 runtime_visible_type_annotations = cfs->get_u1_buffer(); 3351 assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); 3352 // No need for the VM to parse Type annotations 3353 cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); 3354 } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { 3355 if (runtime_invisible_type_annotations_exists) { 3356 classfile_parse_error( 3357 "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); 3358 } else { 3359 runtime_invisible_type_annotations_exists = true; 3360 } 3361 if (PreserveAllAnnotations) { 3362 runtime_invisible_type_annotations_length = attribute_length; 3363 runtime_invisible_type_annotations = cfs->get_u1_buffer(); 3364 assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); 3365 } 3366 cfs->skip_u1(attribute_length, CHECK); 3367 } else { 3368 // Unknown attribute 3369 cfs->skip_u1(attribute_length, CHECK); 3370 } 3371 } else { 3372 // Unknown attribute 3373 cfs->skip_u1(attribute_length, CHECK); 3374 } 3375 } 3376 _annotations = assemble_annotations(runtime_visible_annotations, 3377 runtime_visible_annotations_length, 3378 runtime_invisible_annotations, 3379 runtime_invisible_annotations_length, 3380 CHECK); 3381 _type_annotations = assemble_annotations(runtime_visible_type_annotations, 3382 runtime_visible_type_annotations_length, 3383 runtime_invisible_type_annotations, 3384 runtime_invisible_type_annotations_length, 3385 CHECK); 3386 3387 if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { 3388 const u2 num_of_classes = parse_classfile_inner_classes_attribute( 3389 cfs, 3390 inner_classes_attribute_start, 3391 parsed_innerclasses_attribute, 3392 enclosing_method_class_index, 3393 enclosing_method_method_index, 3394 CHECK); 3395 if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { 3396 guarantee_property( 3397 inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, 3398 "Wrong InnerClasses attribute length in class file %s", CHECK); 3399 } 3400 } 3401 3402 if (_max_bootstrap_specifier_index >= 0) { 3403 guarantee_property(parsed_bootstrap_methods_attribute, 3404 "Missing BootstrapMethods attribute in class file %s", CHECK); 3405 } 3406 } 3407 3408 void ClassFileParser::apply_parsed_class_attributes(InstanceKlass* k) { 3409 assert(k != NULL, "invariant"); 3410 3411 if (_synthetic_flag) 3412 k->set_is_synthetic(); 3413 if (_sourcefile_index != 0) { 3414 k->set_source_file_name_index(_sourcefile_index); 3415 } 3416 if (_generic_signature_index != 0) { 3417 k->set_generic_signature_index(_generic_signature_index); 3418 } 3419 if (_sde_buffer != NULL) { 3420 k->set_source_debug_extension(_sde_buffer, _sde_length); 3421 } 3422 } 3423 3424 // Create the Annotations object that will 3425 // hold the annotations array for the Klass. 3426 void ClassFileParser::create_combined_annotations(TRAPS) { 3427 if (_annotations == NULL && 3428 _type_annotations == NULL && 3429 _fields_annotations == NULL && 3430 _fields_type_annotations == NULL) { 3431 // Don't create the Annotations object unnecessarily. 3432 return; 3433 } 3434 3435 Annotations* const annotations = Annotations::allocate(_loader_data, CHECK); 3436 annotations->set_class_annotations(_annotations); 3437 annotations->set_class_type_annotations(_type_annotations); 3438 annotations->set_fields_annotations(_fields_annotations); 3439 annotations->set_fields_type_annotations(_fields_type_annotations); 3440 3441 // This is the Annotations object that will be 3442 // assigned to InstanceKlass being constructed. 3443 _combined_annotations = annotations; 3444 3445 // The annotations arrays below has been transfered the 3446 // _combined_annotations so these fields can now be cleared. 3447 _annotations = NULL; 3448 _type_annotations = NULL; 3449 _fields_annotations = NULL; 3450 _fields_type_annotations = NULL; 3451 } 3452 3453 // Transfer ownership of metadata allocated to the InstanceKlass. 3454 void ClassFileParser::apply_parsed_class_metadata( 3455 InstanceKlass* this_klass, 3456 int java_fields_count, TRAPS) { 3457 assert(this_klass != NULL, "invariant"); 3458 3459 _cp->set_pool_holder(this_klass); 3460 this_klass->set_constants(_cp); 3461 this_klass->set_fields(_fields, java_fields_count); 3462 this_klass->set_methods(_methods); 3463 this_klass->set_inner_classes(_inner_classes); 3464 this_klass->set_local_interfaces(_local_interfaces); 3465 this_klass->set_transitive_interfaces(_transitive_interfaces); 3466 this_klass->set_annotations(_combined_annotations); 3467 3468 // Clear out these fields so they don't get deallocated by the destructor 3469 clear_class_metadata(); 3470 } 3471 3472 AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations, 3473 int runtime_visible_annotations_length, 3474 const u1* const runtime_invisible_annotations, 3475 int runtime_invisible_annotations_length, 3476 TRAPS) { 3477 AnnotationArray* annotations = NULL; 3478 if (runtime_visible_annotations != NULL || 3479 runtime_invisible_annotations != NULL) { 3480 annotations = MetadataFactory::new_array<u1>(_loader_data, 3481 runtime_visible_annotations_length + 3482 runtime_invisible_annotations_length, 3483 CHECK_(annotations)); 3484 if (runtime_visible_annotations != NULL) { 3485 for (int i = 0; i < runtime_visible_annotations_length; i++) { 3486 annotations->at_put(i, runtime_visible_annotations[i]); 3487 } 3488 } 3489 if (runtime_invisible_annotations != NULL) { 3490 for (int i = 0; i < runtime_invisible_annotations_length; i++) { 3491 int append = runtime_visible_annotations_length+i; 3492 annotations->at_put(append, runtime_invisible_annotations[i]); 3493 } 3494 } 3495 } 3496 return annotations; 3497 } 3498 3499 const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp, 3500 const int super_class_index, 3501 const bool need_verify, 3502 TRAPS) { 3503 assert(cp != NULL, "invariant"); 3504 const InstanceKlass* super_klass = NULL; 3505 3506 if (super_class_index == 0) { 3507 check_property(_class_name == vmSymbols::java_lang_Object(), 3508 "Invalid superclass index %u in class file %s", 3509 super_class_index, 3510 CHECK_NULL); 3511 } else { 3512 check_property(valid_klass_reference_at(super_class_index), 3513 "Invalid superclass index %u in class file %s", 3514 super_class_index, 3515 CHECK_NULL); 3516 // The class name should be legal because it is checked when parsing constant pool. 3517 // However, make sure it is not an array type. 3518 bool is_array = false; 3519 if (cp->tag_at(super_class_index).is_klass()) { 3520 super_klass = InstanceKlass::cast(cp->resolved_klass_at(super_class_index)); 3521 if (need_verify) 3522 is_array = super_klass->is_array_klass(); 3523 } else if (need_verify) { 3524 is_array = (cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); 3525 } 3526 if (need_verify) { 3527 guarantee_property(!is_array, 3528 "Bad superclass name in class file %s", CHECK_NULL); 3529 } 3530 } 3531 return super_klass; 3532 } 3533 3534 static unsigned int compute_oop_map_count(const InstanceKlass* super, 3535 unsigned int nonstatic_oop_map_count, 3536 int first_nonstatic_oop_offset) { 3537 3538 unsigned int map_count = 3539 NULL == super ? 0 : super->nonstatic_oop_map_count(); 3540 if (nonstatic_oop_map_count > 0) { 3541 // We have oops to add to map 3542 if (map_count == 0) { 3543 map_count = nonstatic_oop_map_count; 3544 } 3545 else { 3546 // Check whether we should add a new map block or whether the last one can 3547 // be extended 3548 const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); 3549 const OopMapBlock* const last_map = first_map + map_count - 1; 3550 3551 const int next_offset = last_map->offset() + last_map->count() * heapOopSize; 3552 if (next_offset == first_nonstatic_oop_offset) { 3553 // There is no gap bettwen superklass's last oop field and first 3554 // local oop field, merge maps. 3555 nonstatic_oop_map_count -= 1; 3556 } 3557 else { 3558 // Superklass didn't end with a oop field, add extra maps 3559 assert(next_offset < first_nonstatic_oop_offset, "just checking"); 3560 } 3561 map_count += nonstatic_oop_map_count; 3562 } 3563 } 3564 return map_count; 3565 } 3566 3567 #ifndef PRODUCT 3568 static void print_field_layout(const Symbol* name, 3569 Array<u2>* fields, 3570 constantPoolHandle cp, 3571 int instance_size, 3572 int instance_fields_start, 3573 int instance_fields_end, 3574 int static_fields_end) { 3575 3576 assert(name != NULL, "invariant"); 3577 3578 tty->print("%s: field layout\n", name->as_klass_external_name()); 3579 tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); 3580 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3581 if (!fs.access_flags().is_static()) { 3582 tty->print(" @%3d \"%s\" %s\n", 3583 fs.offset(), 3584 fs.name()->as_klass_external_name(), 3585 fs.signature()->as_klass_external_name()); 3586 } 3587 } 3588 tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); 3589 tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); 3590 tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); 3591 for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { 3592 if (fs.access_flags().is_static()) { 3593 tty->print(" @%3d \"%s\" %s\n", 3594 fs.offset(), 3595 fs.name()->as_klass_external_name(), 3596 fs.signature()->as_klass_external_name()); 3597 } 3598 } 3599 tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); 3600 tty->print("\n"); 3601 } 3602 #endif 3603 3604 // Values needed for oopmap and InstanceKlass creation 3605 class ClassFileParser::FieldLayoutInfo : public ResourceObj { 3606 public: 3607 int* nonstatic_oop_offsets; 3608 unsigned int* nonstatic_oop_counts; 3609 unsigned int nonstatic_oop_map_count; 3610 unsigned int total_oop_map_count; 3611 int instance_size; 3612 int nonstatic_field_size; 3613 int static_field_size; 3614 bool has_nonstatic_fields; 3615 }; 3616 3617 // Layout fields and fill in FieldLayoutInfo. Could use more refactoring! 3618 void ClassFileParser::layout_fields(ConstantPool* cp, 3619 const FieldAllocationCount* fac, 3620 const ClassAnnotationCollector* parsed_annotations, 3621 FieldLayoutInfo* info, 3622 TRAPS) { 3623 3624 assert(cp != NULL, "invariant"); 3625 3626 // Field size and offset computation 3627 int nonstatic_field_size = _super_klass == NULL ? 0 : 3628 _super_klass->nonstatic_field_size(); 3629 3630 // Count the contended fields by type. 3631 // 3632 // We ignore static fields, because @Contended is not supported for them. 3633 // The layout code below will also ignore the static fields. 3634 int nonstatic_contended_count = 0; 3635 FieldAllocationCount fac_contended; 3636 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3637 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3638 if (fs.is_contended()) { 3639 fac_contended.count[atype]++; 3640 if (!fs.access_flags().is_static()) { 3641 nonstatic_contended_count++; 3642 } 3643 } 3644 } 3645 3646 3647 // Calculate the starting byte offsets 3648 int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); 3649 int next_static_double_offset = next_static_oop_offset + 3650 ((fac->count[STATIC_OOP]) * heapOopSize); 3651 if ( fac->count[STATIC_DOUBLE] && 3652 (Universe::field_type_should_be_aligned(T_DOUBLE) || 3653 Universe::field_type_should_be_aligned(T_LONG)) ) { 3654 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); 3655 } 3656 3657 int next_static_word_offset = next_static_double_offset + 3658 ((fac->count[STATIC_DOUBLE]) * BytesPerLong); 3659 int next_static_short_offset = next_static_word_offset + 3660 ((fac->count[STATIC_WORD]) * BytesPerInt); 3661 int next_static_byte_offset = next_static_short_offset + 3662 ((fac->count[STATIC_SHORT]) * BytesPerShort); 3663 3664 int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + 3665 nonstatic_field_size * heapOopSize; 3666 3667 int next_nonstatic_field_offset = nonstatic_fields_start; 3668 3669 const bool is_contended_class = parsed_annotations->is_contended(); 3670 3671 // Class is contended, pad before all the fields 3672 if (is_contended_class) { 3673 next_nonstatic_field_offset += ContendedPaddingWidth; 3674 } 3675 3676 // Compute the non-contended fields count. 3677 // The packing code below relies on these counts to determine if some field 3678 // can be squeezed into the alignment gap. Contended fields are obviously 3679 // exempt from that. 3680 unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; 3681 unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; 3682 unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; 3683 unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; 3684 unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; 3685 3686 // Total non-static fields count, including every contended field 3687 unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + 3688 fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + 3689 fac->count[NONSTATIC_OOP]; 3690 3691 const bool super_has_nonstatic_fields = 3692 (_super_klass != NULL && _super_klass->has_nonstatic_fields()); 3693 const bool has_nonstatic_fields = 3694 super_has_nonstatic_fields || (nonstatic_fields_count != 0); 3695 3696 3697 // Prepare list of oops for oop map generation. 3698 // 3699 // "offset" and "count" lists are describing the set of contiguous oop 3700 // regions. offset[i] is the start of the i-th region, which then has 3701 // count[i] oops following. Before we know how many regions are required, 3702 // we pessimistically allocate the maps to fit all the oops into the 3703 // distinct regions. 3704 // 3705 // TODO: We add +1 to always allocate non-zero resource arrays; we need 3706 // to figure out if we still need to do this. 3707 unsigned int nonstatic_oop_map_count = 0; 3708 unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; 3709 3710 int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( 3711 THREAD, int, max_nonstatic_oop_maps); 3712 unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( 3713 THREAD, unsigned int, max_nonstatic_oop_maps); 3714 3715 int first_nonstatic_oop_offset = 0; // will be set for first oop field 3716 3717 bool compact_fields = CompactFields; 3718 int allocation_style = FieldsAllocationStyle; 3719 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? 3720 assert(false, "0 <= FieldsAllocationStyle <= 2"); 3721 allocation_style = 1; // Optimistic 3722 } 3723 3724 // The next classes have predefined hard-coded fields offsets 3725 // (see in JavaClasses::compute_hard_coded_offsets()). 3726 // Use default fields allocation order for them. 3727 if( (allocation_style != 0 || compact_fields ) && _loader_data->class_loader() == NULL && 3728 (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || 3729 _class_name == vmSymbols::java_lang_Class() || 3730 _class_name == vmSymbols::java_lang_ClassLoader() || 3731 _class_name == vmSymbols::java_lang_ref_Reference() || 3732 _class_name == vmSymbols::java_lang_ref_SoftReference() || 3733 _class_name == vmSymbols::java_lang_StackTraceElement() || 3734 _class_name == vmSymbols::java_lang_String() || 3735 _class_name == vmSymbols::java_lang_Throwable() || 3736 _class_name == vmSymbols::java_lang_Boolean() || 3737 _class_name == vmSymbols::java_lang_Character() || 3738 _class_name == vmSymbols::java_lang_Float() || 3739 _class_name == vmSymbols::java_lang_Double() || 3740 _class_name == vmSymbols::java_lang_Byte() || 3741 _class_name == vmSymbols::java_lang_Short() || 3742 _class_name == vmSymbols::java_lang_Integer() || 3743 _class_name == vmSymbols::java_lang_Long())) { 3744 allocation_style = 0; // Allocate oops first 3745 compact_fields = false; // Don't compact fields 3746 } 3747 3748 int next_nonstatic_oop_offset = 0; 3749 int next_nonstatic_double_offset = 0; 3750 3751 // Rearrange fields for a given allocation style 3752 if( allocation_style == 0 ) { 3753 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields 3754 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3755 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3756 (nonstatic_oop_count * heapOopSize); 3757 } else if( allocation_style == 1 ) { 3758 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields 3759 next_nonstatic_double_offset = next_nonstatic_field_offset; 3760 } else if( allocation_style == 2 ) { 3761 // Fields allocation: oops fields in super and sub classes are together. 3762 if( nonstatic_field_size > 0 && _super_klass != NULL && 3763 _super_klass->nonstatic_oop_map_size() > 0 ) { 3764 const unsigned int map_count = _super_klass->nonstatic_oop_map_count(); 3765 const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps(); 3766 const OopMapBlock* const last_map = first_map + map_count - 1; 3767 const int next_offset = last_map->offset() + (last_map->count() * heapOopSize); 3768 if (next_offset == next_nonstatic_field_offset) { 3769 allocation_style = 0; // allocate oops first 3770 next_nonstatic_oop_offset = next_nonstatic_field_offset; 3771 next_nonstatic_double_offset = next_nonstatic_oop_offset + 3772 (nonstatic_oop_count * heapOopSize); 3773 } 3774 } 3775 if( allocation_style == 2 ) { 3776 allocation_style = 1; // allocate oops last 3777 next_nonstatic_double_offset = next_nonstatic_field_offset; 3778 } 3779 } else { 3780 ShouldNotReachHere(); 3781 } 3782 3783 int nonstatic_oop_space_count = 0; 3784 int nonstatic_word_space_count = 0; 3785 int nonstatic_short_space_count = 0; 3786 int nonstatic_byte_space_count = 0; 3787 int nonstatic_oop_space_offset = 0; 3788 int nonstatic_word_space_offset = 0; 3789 int nonstatic_short_space_offset = 0; 3790 int nonstatic_byte_space_offset = 0; 3791 3792 // Try to squeeze some of the fields into the gaps due to 3793 // long/double alignment. 3794 if (nonstatic_double_count > 0) { 3795 int offset = next_nonstatic_double_offset; 3796 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); 3797 if (compact_fields && offset != next_nonstatic_double_offset) { 3798 // Allocate available fields into the gap before double field. 3799 int length = next_nonstatic_double_offset - offset; 3800 assert(length == BytesPerInt, ""); 3801 nonstatic_word_space_offset = offset; 3802 if (nonstatic_word_count > 0) { 3803 nonstatic_word_count -= 1; 3804 nonstatic_word_space_count = 1; // Only one will fit 3805 length -= BytesPerInt; 3806 offset += BytesPerInt; 3807 } 3808 nonstatic_short_space_offset = offset; 3809 while (length >= BytesPerShort && nonstatic_short_count > 0) { 3810 nonstatic_short_count -= 1; 3811 nonstatic_short_space_count += 1; 3812 length -= BytesPerShort; 3813 offset += BytesPerShort; 3814 } 3815 nonstatic_byte_space_offset = offset; 3816 while (length > 0 && nonstatic_byte_count > 0) { 3817 nonstatic_byte_count -= 1; 3818 nonstatic_byte_space_count += 1; 3819 length -= 1; 3820 } 3821 // Allocate oop field in the gap if there are no other fields for that. 3822 nonstatic_oop_space_offset = offset; 3823 if (length >= heapOopSize && nonstatic_oop_count > 0 && 3824 allocation_style != 0) { // when oop fields not first 3825 nonstatic_oop_count -= 1; 3826 nonstatic_oop_space_count = 1; // Only one will fit 3827 length -= heapOopSize; 3828 offset += heapOopSize; 3829 } 3830 } 3831 } 3832 3833 int next_nonstatic_word_offset = next_nonstatic_double_offset + 3834 (nonstatic_double_count * BytesPerLong); 3835 int next_nonstatic_short_offset = next_nonstatic_word_offset + 3836 (nonstatic_word_count * BytesPerInt); 3837 int next_nonstatic_byte_offset = next_nonstatic_short_offset + 3838 (nonstatic_short_count * BytesPerShort); 3839 int next_nonstatic_padded_offset = next_nonstatic_byte_offset + 3840 nonstatic_byte_count; 3841 3842 // let oops jump before padding with this allocation style 3843 if( allocation_style == 1 ) { 3844 next_nonstatic_oop_offset = next_nonstatic_padded_offset; 3845 if( nonstatic_oop_count > 0 ) { 3846 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); 3847 } 3848 next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); 3849 } 3850 3851 // Iterate over fields again and compute correct offsets. 3852 // The field allocation type was temporarily stored in the offset slot. 3853 // oop fields are located before non-oop fields (static and non-static). 3854 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3855 3856 // skip already laid out fields 3857 if (fs.is_offset_set()) continue; 3858 3859 // contended instance fields are handled below 3860 if (fs.is_contended() && !fs.access_flags().is_static()) continue; 3861 3862 int real_offset = 0; 3863 const FieldAllocationType atype = (const FieldAllocationType) fs.allocation_type(); 3864 3865 // pack the rest of the fields 3866 switch (atype) { 3867 case STATIC_OOP: 3868 real_offset = next_static_oop_offset; 3869 next_static_oop_offset += heapOopSize; 3870 break; 3871 case STATIC_BYTE: 3872 real_offset = next_static_byte_offset; 3873 next_static_byte_offset += 1; 3874 break; 3875 case STATIC_SHORT: 3876 real_offset = next_static_short_offset; 3877 next_static_short_offset += BytesPerShort; 3878 break; 3879 case STATIC_WORD: 3880 real_offset = next_static_word_offset; 3881 next_static_word_offset += BytesPerInt; 3882 break; 3883 case STATIC_DOUBLE: 3884 real_offset = next_static_double_offset; 3885 next_static_double_offset += BytesPerLong; 3886 break; 3887 case NONSTATIC_OOP: 3888 if( nonstatic_oop_space_count > 0 ) { 3889 real_offset = nonstatic_oop_space_offset; 3890 nonstatic_oop_space_offset += heapOopSize; 3891 nonstatic_oop_space_count -= 1; 3892 } else { 3893 real_offset = next_nonstatic_oop_offset; 3894 next_nonstatic_oop_offset += heapOopSize; 3895 } 3896 3897 // Record this oop in the oop maps 3898 if( nonstatic_oop_map_count > 0 && 3899 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 3900 real_offset - 3901 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 3902 heapOopSize ) { 3903 // This oop is adjacent to the previous one, add to current oop map 3904 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 3905 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 3906 } else { 3907 // This oop is not adjacent to the previous one, create new oop map 3908 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 3909 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 3910 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 3911 nonstatic_oop_map_count += 1; 3912 if( first_nonstatic_oop_offset == 0 ) { // Undefined 3913 first_nonstatic_oop_offset = real_offset; 3914 } 3915 } 3916 break; 3917 case NONSTATIC_BYTE: 3918 if( nonstatic_byte_space_count > 0 ) { 3919 real_offset = nonstatic_byte_space_offset; 3920 nonstatic_byte_space_offset += 1; 3921 nonstatic_byte_space_count -= 1; 3922 } else { 3923 real_offset = next_nonstatic_byte_offset; 3924 next_nonstatic_byte_offset += 1; 3925 } 3926 break; 3927 case NONSTATIC_SHORT: 3928 if( nonstatic_short_space_count > 0 ) { 3929 real_offset = nonstatic_short_space_offset; 3930 nonstatic_short_space_offset += BytesPerShort; 3931 nonstatic_short_space_count -= 1; 3932 } else { 3933 real_offset = next_nonstatic_short_offset; 3934 next_nonstatic_short_offset += BytesPerShort; 3935 } 3936 break; 3937 case NONSTATIC_WORD: 3938 if( nonstatic_word_space_count > 0 ) { 3939 real_offset = nonstatic_word_space_offset; 3940 nonstatic_word_space_offset += BytesPerInt; 3941 nonstatic_word_space_count -= 1; 3942 } else { 3943 real_offset = next_nonstatic_word_offset; 3944 next_nonstatic_word_offset += BytesPerInt; 3945 } 3946 break; 3947 case NONSTATIC_DOUBLE: 3948 real_offset = next_nonstatic_double_offset; 3949 next_nonstatic_double_offset += BytesPerLong; 3950 break; 3951 default: 3952 ShouldNotReachHere(); 3953 } 3954 fs.set_offset(real_offset); 3955 } 3956 3957 3958 // Handle the contended cases. 3959 // 3960 // Each contended field should not intersect the cache line with another contended field. 3961 // In the absence of alignment information, we end up with pessimistically separating 3962 // the fields with full-width padding. 3963 // 3964 // Additionally, this should not break alignment for the fields, so we round the alignment up 3965 // for each field. 3966 if (nonstatic_contended_count > 0) { 3967 3968 // if there is at least one contended field, we need to have pre-padding for them 3969 next_nonstatic_padded_offset += ContendedPaddingWidth; 3970 3971 // collect all contended groups 3972 BitMap bm(cp->size()); 3973 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3974 // skip already laid out fields 3975 if (fs.is_offset_set()) continue; 3976 3977 if (fs.is_contended()) { 3978 bm.set_bit(fs.contended_group()); 3979 } 3980 } 3981 3982 int current_group = -1; 3983 while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { 3984 3985 for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) { 3986 3987 // skip already laid out fields 3988 if (fs.is_offset_set()) continue; 3989 3990 // skip non-contended fields and fields from different group 3991 if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; 3992 3993 // handle statics below 3994 if (fs.access_flags().is_static()) continue; 3995 3996 int real_offset = 0; 3997 FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); 3998 3999 switch (atype) { 4000 case NONSTATIC_BYTE: 4001 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); 4002 real_offset = next_nonstatic_padded_offset; 4003 next_nonstatic_padded_offset += 1; 4004 break; 4005 4006 case NONSTATIC_SHORT: 4007 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); 4008 real_offset = next_nonstatic_padded_offset; 4009 next_nonstatic_padded_offset += BytesPerShort; 4010 break; 4011 4012 case NONSTATIC_WORD: 4013 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); 4014 real_offset = next_nonstatic_padded_offset; 4015 next_nonstatic_padded_offset += BytesPerInt; 4016 break; 4017 4018 case NONSTATIC_DOUBLE: 4019 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); 4020 real_offset = next_nonstatic_padded_offset; 4021 next_nonstatic_padded_offset += BytesPerLong; 4022 break; 4023 4024 case NONSTATIC_OOP: 4025 next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); 4026 real_offset = next_nonstatic_padded_offset; 4027 next_nonstatic_padded_offset += heapOopSize; 4028 4029 // Record this oop in the oop maps 4030 if( nonstatic_oop_map_count > 0 && 4031 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == 4032 real_offset - 4033 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * 4034 heapOopSize ) { 4035 // This oop is adjacent to the previous one, add to current oop map 4036 assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); 4037 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; 4038 } else { 4039 // This oop is not adjacent to the previous one, create new oop map 4040 assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); 4041 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; 4042 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; 4043 nonstatic_oop_map_count += 1; 4044 if( first_nonstatic_oop_offset == 0 ) { // Undefined 4045 first_nonstatic_oop_offset = real_offset; 4046 } 4047 } 4048 break; 4049 4050 default: 4051 ShouldNotReachHere(); 4052 } 4053 4054 if (fs.contended_group() == 0) { 4055 // Contended group defines the equivalence class over the fields: 4056 // the fields within the same contended group are not inter-padded. 4057 // The only exception is default group, which does not incur the 4058 // equivalence, and so requires intra-padding. 4059 next_nonstatic_padded_offset += ContendedPaddingWidth; 4060 } 4061 4062 fs.set_offset(real_offset); 4063 } // for 4064 4065 // Start laying out the next group. 4066 // Note that this will effectively pad the last group in the back; 4067 // this is expected to alleviate memory contention effects for 4068 // subclass fields and/or adjacent object. 4069 // If this was the default group, the padding is already in place. 4070 if (current_group != 0) { 4071 next_nonstatic_padded_offset += ContendedPaddingWidth; 4072 } 4073 } 4074 4075 // handle static fields 4076 } 4077 4078 // Entire class is contended, pad in the back. 4079 // This helps to alleviate memory contention effects for subclass fields 4080 // and/or adjacent object. 4081 if (is_contended_class) { 4082 next_nonstatic_padded_offset += ContendedPaddingWidth; 4083 } 4084 4085 int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; 4086 4087 int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); 4088 int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); 4089 int static_fields_end = align_size_up(next_static_byte_offset, wordSize); 4090 4091 int static_field_size = (static_fields_end - 4092 InstanceMirrorKlass::offset_of_static_fields()) / wordSize; 4093 nonstatic_field_size = nonstatic_field_size + 4094 (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; 4095 4096 int instance_size = align_object_size(instance_end / wordSize); 4097 4098 assert(instance_size == align_object_size(align_size_up( 4099 (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), 4100 wordSize) / wordSize), "consistent layout helper value"); 4101 4102 // Invariant: nonstatic_field end/start should only change if there are 4103 // nonstatic fields in the class, or if the class is contended. We compare 4104 // against the non-aligned value, so that end alignment will not fail the 4105 // assert without actually having the fields. 4106 assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || 4107 is_contended_class || 4108 (nonstatic_fields_count > 0), "double-check nonstatic start/end"); 4109 4110 // Number of non-static oop map blocks allocated at end of klass. 4111 const unsigned int total_oop_map_count = 4112 compute_oop_map_count(_super_klass, nonstatic_oop_map_count, 4113 first_nonstatic_oop_offset); 4114 4115 #ifndef PRODUCT 4116 if (PrintFieldLayout) { 4117 print_field_layout(_class_name, 4118 _fields, 4119 cp, 4120 instance_size, 4121 nonstatic_fields_start, 4122 nonstatic_fields_end, 4123 static_fields_end); 4124 } 4125 4126 #endif 4127 // Pass back information needed for InstanceKlass creation 4128 info->nonstatic_oop_offsets = nonstatic_oop_offsets; 4129 info->nonstatic_oop_counts = nonstatic_oop_counts; 4130 info->nonstatic_oop_map_count = nonstatic_oop_map_count; 4131 info->total_oop_map_count = total_oop_map_count; 4132 info->instance_size = instance_size; 4133 info->static_field_size = static_field_size; 4134 info->nonstatic_field_size = nonstatic_field_size; 4135 info->has_nonstatic_fields = has_nonstatic_fields; 4136 } 4137 4138 static void fill_oop_maps(const InstanceKlass* k, 4139 unsigned int nonstatic_oop_map_count, 4140 const int* nonstatic_oop_offsets, 4141 const unsigned int* nonstatic_oop_counts) { 4142 4143 assert(k != NULL, "invariant"); 4144 4145 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); 4146 const InstanceKlass* const super = k->superklass(); 4147 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; 4148 if (super_count > 0) { 4149 // Copy maps from superklass 4150 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); 4151 for (unsigned int i = 0; i < super_count; ++i) { 4152 *this_oop_map++ = *super_oop_map++; 4153 } 4154 } 4155 4156 if (nonstatic_oop_map_count > 0) { 4157 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { 4158 // The counts differ because there is no gap between superklass's last oop 4159 // field and the first local oop field. Extend the last oop map copied 4160 // from the superklass instead of creating new one. 4161 nonstatic_oop_map_count--; 4162 nonstatic_oop_offsets++; 4163 this_oop_map--; 4164 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); 4165 this_oop_map++; 4166 } 4167 4168 // Add new map blocks, fill them 4169 while (nonstatic_oop_map_count-- > 0) { 4170 this_oop_map->set_offset(*nonstatic_oop_offsets++); 4171 this_oop_map->set_count(*nonstatic_oop_counts++); 4172 this_oop_map++; 4173 } 4174 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == 4175 this_oop_map, "sanity"); 4176 } 4177 } 4178 4179 4180 void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) { 4181 assert(ik != NULL, "invariant"); 4182 4183 const Klass* const super = ik->super(); 4184 4185 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), 4186 // in which case we don't have to register objects as finalizable 4187 if (!_has_empty_finalizer) { 4188 if (_has_finalizer || 4189 (super != NULL && super->has_finalizer())) { 4190 ik->set_has_finalizer(); 4191 } 4192 } 4193 4194 #ifdef ASSERT 4195 bool f = false; 4196 const Method* const m = ik->lookup_method(vmSymbols::finalize_method_name(), 4197 vmSymbols::void_method_signature()); 4198 if (m != NULL && !m->is_empty_method()) { 4199 f = true; 4200 } 4201 4202 // Spec doesn't prevent agent from redefinition of empty finalizer. 4203 // Despite the fact that it's generally bad idea and redefined finalizer 4204 // will not work as expected we shouldn't abort vm in this case 4205 if (!ik->has_redefined_this_or_super()) { 4206 assert(ik->has_finalizer() == f, "inconsistent has_finalizer"); 4207 } 4208 #endif 4209 4210 // Check if this klass supports the java.lang.Cloneable interface 4211 if (SystemDictionary::Cloneable_klass_loaded()) { 4212 if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) { 4213 ik->set_is_cloneable(); 4214 } 4215 } 4216 4217 // Check if this klass has a vanilla default constructor 4218 if (super == NULL) { 4219 // java.lang.Object has empty default constructor 4220 ik->set_has_vanilla_constructor(); 4221 } else { 4222 if (super->has_vanilla_constructor() && 4223 _has_vanilla_constructor) { 4224 ik->set_has_vanilla_constructor(); 4225 } 4226 #ifdef ASSERT 4227 bool v = false; 4228 if (super->has_vanilla_constructor()) { 4229 const Method* const constructor = 4230 ik->find_method(vmSymbols::object_initializer_name(), 4231 vmSymbols::void_method_signature()); 4232 if (constructor != NULL && constructor->is_vanilla_constructor()) { 4233 v = true; 4234 } 4235 } 4236 assert(v == ik->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); 4237 #endif 4238 } 4239 4240 // If it cannot be fast-path allocated, set a bit in the layout helper. 4241 // See documentation of InstanceKlass::can_be_fastpath_allocated(). 4242 assert(ik->size_helper() > 0, "layout_helper is initialized"); 4243 if ((!RegisterFinalizersAtInit && ik->has_finalizer()) 4244 || ik->is_abstract() || ik->is_interface() 4245 || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL) 4246 || ik->size_helper() >= FastAllocateSizeLimit) { 4247 // Forbid fast-path allocation. 4248 const jint lh = Klass::instance_layout_helper(ik->size_helper(), true); 4249 ik->set_layout_helper(lh); 4250 } 4251 } 4252 4253 // Attach super classes and interface classes to class loader data 4254 static void record_defined_class_dependencies(const InstanceKlass* defined_klass, 4255 TRAPS) { 4256 assert(defined_klass != NULL, "invariant"); 4257 4258 ClassLoaderData* const defining_loader_data = defined_klass->class_loader_data(); 4259 if (defining_loader_data->is_the_null_class_loader_data()) { 4260 // Dependencies to null class loader data are implicit. 4261 return; 4262 } else { 4263 // add super class dependency 4264 Klass* const super = defined_klass->super(); 4265 if (super != NULL) { 4266 defining_loader_data->record_dependency(super, CHECK); 4267 } 4268 4269 // add super interface dependencies 4270 const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces(); 4271 if (local_interfaces != NULL) { 4272 const int length = local_interfaces->length(); 4273 for (int i = 0; i < length; i++) { 4274 defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); 4275 } 4276 } 4277 } 4278 } 4279 4280 // utility methods for appending an array with check for duplicates 4281 4282 static void append_interfaces(GrowableArray<Klass*>* result, 4283 const Array<Klass*>* const ifs) { 4284 // iterate over new interfaces 4285 for (int i = 0; i < ifs->length(); i++) { 4286 Klass* const e = ifs->at(i); 4287 assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); 4288 // add new interface 4289 result->append_if_missing(e); 4290 } 4291 } 4292 4293 static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super, 4294 Array<Klass*>* local_ifs, 4295 ClassLoaderData* loader_data, 4296 TRAPS) { 4297 assert(local_ifs != NULL, "invariant"); 4298 assert(loader_data != NULL, "invariant"); 4299 4300 // Compute maximum size for transitive interfaces 4301 int max_transitive_size = 0; 4302 int super_size = 0; 4303 // Add superclass transitive interfaces size 4304 if (super != NULL) { 4305 super_size = super->transitive_interfaces()->length(); 4306 max_transitive_size += super_size; 4307 } 4308 // Add local interfaces' super interfaces 4309 const int local_size = local_ifs->length(); 4310 for (int i = 0; i < local_size; i++) { 4311 Klass* const l = local_ifs->at(i); 4312 max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); 4313 } 4314 // Finally add local interfaces 4315 max_transitive_size += local_size; 4316 // Construct array 4317 if (max_transitive_size == 0) { 4318 // no interfaces, use canonicalized array 4319 return Universe::the_empty_klass_array(); 4320 } else if (max_transitive_size == super_size) { 4321 // no new local interfaces added, share superklass' transitive interface array 4322 return super->transitive_interfaces(); 4323 } else if (max_transitive_size == local_size) { 4324 // only local interfaces added, share local interface array 4325 return local_ifs; 4326 } else { 4327 ResourceMark rm; 4328 GrowableArray<Klass*>* const result = new GrowableArray<Klass*>(max_transitive_size); 4329 4330 // Copy down from superclass 4331 if (super != NULL) { 4332 append_interfaces(result, super->transitive_interfaces()); 4333 } 4334 4335 // Copy down from local interfaces' superinterfaces 4336 for (int i = 0; i < local_size; i++) { 4337 Klass* const l = local_ifs->at(i); 4338 append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); 4339 } 4340 // Finally add local interfaces 4341 append_interfaces(result, local_ifs); 4342 4343 // length will be less than the max_transitive_size if duplicates were removed 4344 const int length = result->length(); 4345 assert(length <= max_transitive_size, "just checking"); 4346 Array<Klass*>* const new_result = 4347 MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL); 4348 for (int i = 0; i < length; i++) { 4349 Klass* const e = result->at(i); 4350 assert(e != NULL, "just checking"); 4351 new_result->at_put(i, e); 4352 } 4353 return new_result; 4354 } 4355 } 4356 4357 static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) { 4358 assert(this_klass != NULL, "invariant"); 4359 const Klass* const super = this_klass->super(); 4360 if (super != NULL) { 4361 Reflection::VerifyClassAccessResults vca_result = 4362 Reflection::verify_class_access(this_klass, super, false); 4363 if (vca_result != Reflection::ACCESS_OK) { 4364 ResourceMark rm(THREAD); 4365 char* msg = Reflection::verify_class_access_msg(this_klass, super, vca_result); 4366 if (msg == NULL) { 4367 ResourceMark rm(THREAD); 4368 Exceptions::fthrow( 4369 THREAD_AND_LOCATION, 4370 vmSymbols::java_lang_IllegalAccessError(), 4371 "class %s cannot access its superclass %s", 4372 this_klass->external_name(), 4373 super->external_name()); 4374 } else { 4375 // Add additional message content. 4376 Exceptions::fthrow( 4377 THREAD_AND_LOCATION, 4378 vmSymbols::java_lang_IllegalAccessError(), 4379 "superclass access check failed: %s", 4380 msg); 4381 } 4382 } 4383 } 4384 } 4385 4386 4387 static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) { 4388 assert(this_klass != NULL, "invariant"); 4389 const Array<Klass*>* const local_interfaces = this_klass->local_interfaces(); 4390 const int lng = local_interfaces->length(); 4391 for (int i = lng - 1; i >= 0; i--) { 4392 Klass* const k = local_interfaces->at(i); 4393 assert (k != NULL && k->is_interface(), "invalid interface"); 4394 Reflection::VerifyClassAccessResults vca_result = 4395 Reflection::verify_class_access(this_klass, k, false); 4396 if (vca_result != Reflection::ACCESS_OK) { 4397 ResourceMark rm(THREAD); 4398 char* msg = Reflection::verify_class_access_msg(this_klass, k, vca_result); 4399 if (msg == NULL) { 4400 Exceptions::fthrow( 4401 THREAD_AND_LOCATION, 4402 vmSymbols::java_lang_IllegalAccessError(), 4403 "class %s cannot access its superinterface %s", 4404 this_klass->external_name(), 4405 k->external_name()); 4406 } else { 4407 // Add additional message content. 4408 Exceptions::fthrow( 4409 THREAD_AND_LOCATION, 4410 vmSymbols::java_lang_IllegalAccessError(), 4411 "superinterface check failed: %s", 4412 msg); 4413 } 4414 } 4415 } 4416 } 4417 4418 4419 static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) { 4420 assert(this_klass != NULL, "invariant"); 4421 const Array<Method*>* const methods = this_klass->methods(); 4422 const int num_methods = methods->length(); 4423 4424 // go thru each method and check if it overrides a final method 4425 for (int index = 0; index < num_methods; index++) { 4426 const Method* const m = methods->at(index); 4427 4428 // skip private, static, and <init> methods 4429 if ((!m->is_private() && !m->is_static()) && 4430 (m->name() != vmSymbols::object_initializer_name())) { 4431 4432 const Symbol* const name = m->name(); 4433 const Symbol* const signature = m->signature(); 4434 const Klass* k = this_klass->super(); 4435 const Method* super_m = NULL; 4436 while (k != NULL) { 4437 // skip supers that don't have final methods. 4438 if (k->has_final_method()) { 4439 // lookup a matching method in the super class hierarchy 4440 super_m = InstanceKlass::cast(k)->lookup_method(name, signature); 4441 if (super_m == NULL) { 4442 break; // didn't find any match; get out 4443 } 4444 4445 if (super_m->is_final() && !super_m->is_static() && 4446 // matching method in super is final, and not static 4447 (Reflection::verify_field_access(this_klass, 4448 super_m->method_holder(), 4449 super_m->method_holder(), 4450 super_m->access_flags(), false)) 4451 // this class can access super final method and therefore override 4452 ) { 4453 ResourceMark rm(THREAD); 4454 Exceptions::fthrow( 4455 THREAD_AND_LOCATION, 4456 vmSymbols::java_lang_VerifyError(), 4457 "class %s overrides final method %s.%s%s", 4458 this_klass->external_name(), 4459 super_m->method_holder()->external_name(), 4460 name->as_C_string(), 4461 signature->as_C_string() 4462 ); 4463 return; 4464 } 4465 4466 // continue to look from super_m's holder's super. 4467 k = super_m->method_holder()->super(); 4468 continue; 4469 } 4470 4471 k = k->super(); 4472 } 4473 } 4474 } 4475 } 4476 4477 4478 // assumes that this_klass is an interface 4479 static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) { 4480 assert(this_klass != NULL, "invariant"); 4481 assert(this_klass->is_interface(), "not an interface"); 4482 const Array<Method*>* methods = this_klass->methods(); 4483 const int num_methods = methods->length(); 4484 4485 for (int index = 0; index < num_methods; index++) { 4486 const Method* const m = methods->at(index); 4487 // if m is static and not the init method, throw a verify error 4488 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { 4489 ResourceMark rm(THREAD); 4490 Exceptions::fthrow( 4491 THREAD_AND_LOCATION, 4492 vmSymbols::java_lang_VerifyError(), 4493 "Illegal static method %s in interface %s", 4494 m->name()->as_C_string(), 4495 this_klass->external_name() 4496 ); 4497 return; 4498 } 4499 } 4500 } 4501 4502 // utility methods for format checking 4503 4504 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) const { 4505 if (!_need_verify) { return; } 4506 4507 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; 4508 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4509 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4510 const bool is_super = (flags & JVM_ACC_SUPER) != 0; 4511 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4512 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; 4513 const bool is_module_info= (flags & JVM_ACC_MODULE) != 0; 4514 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4515 4516 if ((is_abstract && is_final) || 4517 (is_interface && !is_abstract) || 4518 (is_interface && major_gte_15 && (is_super || is_enum)) || 4519 (!is_interface && major_gte_15 && is_annotation) || 4520 is_module_info) { 4521 ResourceMark rm(THREAD); 4522 Exceptions::fthrow( 4523 THREAD_AND_LOCATION, 4524 vmSymbols::java_lang_ClassFormatError(), 4525 "Illegal class modifiers in class %s: 0x%X", 4526 _class_name->as_C_string(), flags 4527 ); 4528 return; 4529 } 4530 } 4531 4532 static bool has_illegal_visibility(jint flags) { 4533 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4534 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4535 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4536 4537 return ((is_public && is_protected) || 4538 (is_public && is_private) || 4539 (is_protected && is_private)); 4540 } 4541 4542 static bool is_supported_version(u2 major, u2 minor){ 4543 const u2 max_version = JAVA_MAX_SUPPORTED_VERSION; 4544 return (major >= JAVA_MIN_SUPPORTED_VERSION) && 4545 (major <= max_version) && 4546 ((major != max_version) || 4547 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); 4548 } 4549 4550 void ClassFileParser::verify_legal_field_modifiers(jint flags, 4551 bool is_interface, 4552 TRAPS) const { 4553 if (!_need_verify) { return; } 4554 4555 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4556 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4557 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4558 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4559 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4560 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; 4561 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; 4562 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; 4563 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4564 4565 bool is_illegal = false; 4566 4567 if (is_interface) { 4568 if (!is_public || !is_static || !is_final || is_private || 4569 is_protected || is_volatile || is_transient || 4570 (major_gte_15 && is_enum)) { 4571 is_illegal = true; 4572 } 4573 } else { // not interface 4574 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { 4575 is_illegal = true; 4576 } 4577 } 4578 4579 if (is_illegal) { 4580 ResourceMark rm(THREAD); 4581 Exceptions::fthrow( 4582 THREAD_AND_LOCATION, 4583 vmSymbols::java_lang_ClassFormatError(), 4584 "Illegal field modifiers in class %s: 0x%X", 4585 _class_name->as_C_string(), flags); 4586 return; 4587 } 4588 } 4589 4590 void ClassFileParser::verify_legal_method_modifiers(jint flags, 4591 bool is_interface, 4592 const Symbol* name, 4593 TRAPS) const { 4594 if (!_need_verify) { return; } 4595 4596 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; 4597 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; 4598 const bool is_static = (flags & JVM_ACC_STATIC) != 0; 4599 const bool is_final = (flags & JVM_ACC_FINAL) != 0; 4600 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; 4601 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; 4602 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; 4603 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; 4604 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; 4605 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; 4606 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; 4607 const bool major_gte_8 = _major_version >= JAVA_8_VERSION; 4608 const bool is_initializer = (name == vmSymbols::object_initializer_name()); 4609 4610 bool is_illegal = false; 4611 4612 if (is_interface) { 4613 if (major_gte_8) { 4614 // Class file version is JAVA_8_VERSION or later Methods of 4615 // interfaces may set any of the flags except ACC_PROTECTED, 4616 // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must 4617 // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. 4618 if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ 4619 (is_native || is_protected || is_final || is_synchronized) || 4620 // If a specific method of a class or interface has its 4621 // ACC_ABSTRACT flag set, it must not have any of its 4622 // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, 4623 // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to 4624 // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as 4625 // those flags are illegal irrespective of ACC_ABSTRACT being set or not. 4626 (is_abstract && (is_private || is_static || is_strict))) { 4627 is_illegal = true; 4628 } 4629 } else if (major_gte_15) { 4630 // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) 4631 if (!is_public || is_private || is_protected || is_static || is_final || 4632 is_synchronized || is_native || !is_abstract || is_strict) { 4633 is_illegal = true; 4634 } 4635 } else { 4636 // Class file version is pre-JAVA_1_5_VERSION 4637 if (!is_public || is_static || is_final || is_native || !is_abstract) { 4638 is_illegal = true; 4639 } 4640 } 4641 } else { // not interface 4642 if (has_illegal_visibility(flags)) { 4643 is_illegal = true; 4644 } else { 4645 if (is_initializer) { 4646 if (is_static || is_final || is_synchronized || is_native || 4647 is_abstract || (major_gte_15 && is_bridge)) { 4648 is_illegal = true; 4649 } 4650 } else { // not initializer 4651 if (is_abstract) { 4652 if ((is_final || is_native || is_private || is_static || 4653 (major_gte_15 && (is_synchronized || is_strict)))) { 4654 is_illegal = true; 4655 } 4656 } 4657 } 4658 } 4659 } 4660 4661 if (is_illegal) { 4662 ResourceMark rm(THREAD); 4663 Exceptions::fthrow( 4664 THREAD_AND_LOCATION, 4665 vmSymbols::java_lang_ClassFormatError(), 4666 "Method %s in class %s has illegal modifiers: 0x%X", 4667 name->as_C_string(), _class_name->as_C_string(), flags); 4668 return; 4669 } 4670 } 4671 4672 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, 4673 int length, 4674 TRAPS) const { 4675 assert(_need_verify, "only called when _need_verify is true"); 4676 if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) { 4677 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); 4678 } 4679 } 4680 4681 // Unqualified names may not contain the characters '.', ';', '[', or '/'. 4682 // Method names also may not contain the characters '<' or '>', unless <init> 4683 // or <clinit>. Note that method names may not be <init> or <clinit> in this 4684 // method. Because these names have been checked as special cases before 4685 // calling this method in verify_legal_method_name. 4686 // 4687 // This method is also called from the modular system APIs in modules.cpp 4688 // to verify the validity of module and package names. 4689 bool ClassFileParser::verify_unqualified_name(const char* name, 4690 unsigned int length, 4691 int type) { 4692 for (const char* p = name; p != name + length;) { 4693 jchar ch = *p; 4694 if (ch < 128) { 4695 if (ch == '.') { 4696 // permit '.' in module names unless it's the first char, or 4697 // preceding char is also a '.', or last char is a '.'. 4698 if ((type != ClassFileParser::LegalModule) || 4699 (p == name) || (*(p-1) == '.') || 4700 (p == name + length - 1)) { 4701 return false; 4702 } 4703 } 4704 if (ch == ';' || ch == '[' ) { 4705 return false; // do not permit '.', ';', or '[' 4706 } 4707 if (type != ClassFileParser::LegalClass && ch == '/') { 4708 return false; // do not permit '/' unless it's class name 4709 } 4710 if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) { 4711 return false; // do not permit '<' or '>' in method names 4712 } 4713 p++; 4714 } else { 4715 char* tmp_p = UTF8::next(p, &ch); 4716 p = tmp_p; 4717 } 4718 } 4719 return true; 4720 } 4721 4722 // Take pointer to a string. Skip over the longest part of the string that could 4723 // be taken as a fieldname. Allow '/' if slash_ok is true. 4724 // Return a pointer to just past the fieldname. 4725 // Return NULL if no fieldname at all was found, or in the case of slash_ok 4726 // being true, we saw consecutive slashes (meaning we were looking for a 4727 // qualified path but found something that was badly-formed). 4728 static const char* skip_over_field_name(const char* name, 4729 bool slash_ok, 4730 unsigned int length) { 4731 const char* p; 4732 jboolean last_is_slash = false; 4733 jboolean not_first_ch = false; 4734 4735 for (p = name; p != name + length; not_first_ch = true) { 4736 const char* old_p = p; 4737 jchar ch = *p; 4738 if (ch < 128) { 4739 p++; 4740 // quick check for ascii 4741 if ((ch >= 'a' && ch <= 'z') || 4742 (ch >= 'A' && ch <= 'Z') || 4743 (ch == '_' || ch == '$') || 4744 (not_first_ch && ch >= '0' && ch <= '9')) { 4745 last_is_slash = false; 4746 continue; 4747 } 4748 if (slash_ok && ch == '/') { 4749 if (last_is_slash) { 4750 return NULL; // Don't permit consecutive slashes 4751 } 4752 last_is_slash = true; 4753 continue; 4754 } 4755 } 4756 else { 4757 jint unicode_ch; 4758 char* tmp_p = UTF8::next_character(p, &unicode_ch); 4759 p = tmp_p; 4760 last_is_slash = false; 4761 // Check if ch is Java identifier start or is Java identifier part 4762 // 4672820: call java.lang.Character methods directly without generating separate tables. 4763 EXCEPTION_MARK; 4764 4765 // return value 4766 JavaValue result(T_BOOLEAN); 4767 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart 4768 JavaCallArguments args; 4769 args.push_int(unicode_ch); 4770 4771 // public static boolean isJavaIdentifierStart(char ch); 4772 JavaCalls::call_static(&result, 4773 SystemDictionary::Character_klass(), 4774 vmSymbols::isJavaIdentifierStart_name(), 4775 vmSymbols::int_bool_signature(), 4776 &args, 4777 THREAD); 4778 4779 if (HAS_PENDING_EXCEPTION) { 4780 CLEAR_PENDING_EXCEPTION; 4781 return 0; 4782 } 4783 if (result.get_jboolean()) { 4784 continue; 4785 } 4786 4787 if (not_first_ch) { 4788 // public static boolean isJavaIdentifierPart(char ch); 4789 JavaCalls::call_static(&result, 4790 SystemDictionary::Character_klass(), 4791 vmSymbols::isJavaIdentifierPart_name(), 4792 vmSymbols::int_bool_signature(), 4793 &args, 4794 THREAD); 4795 4796 if (HAS_PENDING_EXCEPTION) { 4797 CLEAR_PENDING_EXCEPTION; 4798 return 0; 4799 } 4800 4801 if (result.get_jboolean()) { 4802 continue; 4803 } 4804 } 4805 } 4806 return (not_first_ch) ? old_p : NULL; 4807 } 4808 return (not_first_ch) ? p : NULL; 4809 } 4810 4811 // Take pointer to a string. Skip over the longest part of the string that could 4812 // be taken as a field signature. Allow "void" if void_ok. 4813 // Return a pointer to just past the signature. 4814 // Return NULL if no legal signature is found. 4815 const char* ClassFileParser::skip_over_field_signature(const char* signature, 4816 bool void_ok, 4817 unsigned int length, 4818 TRAPS) const { 4819 unsigned int array_dim = 0; 4820 while (length > 0) { 4821 switch (signature[0]) { 4822 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } 4823 case JVM_SIGNATURE_BOOLEAN: 4824 case JVM_SIGNATURE_BYTE: 4825 case JVM_SIGNATURE_CHAR: 4826 case JVM_SIGNATURE_SHORT: 4827 case JVM_SIGNATURE_INT: 4828 case JVM_SIGNATURE_FLOAT: 4829 case JVM_SIGNATURE_LONG: 4830 case JVM_SIGNATURE_DOUBLE: 4831 return signature + 1; 4832 case JVM_SIGNATURE_CLASS: { 4833 if (_major_version < JAVA_1_5_VERSION) { 4834 // Skip over the class name if one is there 4835 const char* const p = skip_over_field_name(signature + 1, true, --length); 4836 4837 // The next character better be a semicolon 4838 if (p && (p - signature) > 1 && p[0] == ';') { 4839 return p + 1; 4840 } 4841 } 4842 else { 4843 // 4900761: For class version > 48, any unicode is allowed in class name. 4844 length--; 4845 signature++; 4846 while (length > 0 && signature[0] != ';') { 4847 if (signature[0] == '.') { 4848 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); 4849 } 4850 length--; 4851 signature++; 4852 } 4853 if (signature[0] == ';') { return signature + 1; } 4854 } 4855 4856 return NULL; 4857 } 4858 case JVM_SIGNATURE_ARRAY: 4859 array_dim++; 4860 if (array_dim > 255) { 4861 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. 4862 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); 4863 } 4864 // The rest of what's there better be a legal signature 4865 signature++; 4866 length--; 4867 void_ok = false; 4868 break; 4869 4870 default: 4871 return NULL; 4872 } 4873 } 4874 return NULL; 4875 } 4876 4877 // Checks if name is a legal class name. 4878 void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const { 4879 if (!_need_verify || _relax_verify) { return; } 4880 4881 char buf[fixed_buffer_size]; 4882 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4883 unsigned int length = name->utf8_length(); 4884 bool legal = false; 4885 4886 if (length > 0) { 4887 const char* p; 4888 if (bytes[0] == JVM_SIGNATURE_ARRAY) { 4889 p = skip_over_field_signature(bytes, false, length, CHECK); 4890 legal = (p != NULL) && ((p - bytes) == (int)length); 4891 } else if (_major_version < JAVA_1_5_VERSION) { 4892 if (bytes[0] != '<') { 4893 p = skip_over_field_name(bytes, true, length); 4894 legal = (p != NULL) && ((p - bytes) == (int)length); 4895 } 4896 } else { 4897 // 4900761: relax the constraints based on JSR202 spec 4898 // Class names may be drawn from the entire Unicode character set. 4899 // Identifiers between '/' must be unqualified names. 4900 // The utf8 string has been verified when parsing cpool entries. 4901 legal = verify_unqualified_name(bytes, length, LegalClass); 4902 } 4903 } 4904 if (!legal) { 4905 ResourceMark rm(THREAD); 4906 assert(_class_name != NULL, "invariant"); 4907 Exceptions::fthrow( 4908 THREAD_AND_LOCATION, 4909 vmSymbols::java_lang_ClassFormatError(), 4910 "Illegal class name \"%s\" in class file %s", bytes, 4911 _class_name->as_C_string() 4912 ); 4913 return; 4914 } 4915 } 4916 4917 // Checks if name is a legal field name. 4918 void ClassFileParser::verify_legal_field_name(const Symbol* name, TRAPS) const { 4919 if (!_need_verify || _relax_verify) { return; } 4920 4921 char buf[fixed_buffer_size]; 4922 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4923 unsigned int length = name->utf8_length(); 4924 bool legal = false; 4925 4926 if (length > 0) { 4927 if (_major_version < JAVA_1_5_VERSION) { 4928 if (bytes[0] != '<') { 4929 const char* p = skip_over_field_name(bytes, false, length); 4930 legal = (p != NULL) && ((p - bytes) == (int)length); 4931 } 4932 } else { 4933 // 4881221: relax the constraints based on JSR202 spec 4934 legal = verify_unqualified_name(bytes, length, LegalField); 4935 } 4936 } 4937 4938 if (!legal) { 4939 ResourceMark rm(THREAD); 4940 assert(_class_name != NULL, "invariant"); 4941 Exceptions::fthrow( 4942 THREAD_AND_LOCATION, 4943 vmSymbols::java_lang_ClassFormatError(), 4944 "Illegal field name \"%s\" in class %s", bytes, 4945 _class_name->as_C_string() 4946 ); 4947 return; 4948 } 4949 } 4950 4951 // Checks if name is a legal method name. 4952 void ClassFileParser::verify_legal_method_name(const Symbol* name, TRAPS) const { 4953 if (!_need_verify || _relax_verify) { return; } 4954 4955 assert(name != NULL, "method name is null"); 4956 char buf[fixed_buffer_size]; 4957 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4958 unsigned int length = name->utf8_length(); 4959 bool legal = false; 4960 4961 if (length > 0) { 4962 if (bytes[0] == '<') { 4963 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { 4964 legal = true; 4965 } 4966 } else if (_major_version < JAVA_1_5_VERSION) { 4967 const char* p; 4968 p = skip_over_field_name(bytes, false, length); 4969 legal = (p != NULL) && ((p - bytes) == (int)length); 4970 } else { 4971 // 4881221: relax the constraints based on JSR202 spec 4972 legal = verify_unqualified_name(bytes, length, LegalMethod); 4973 } 4974 } 4975 4976 if (!legal) { 4977 ResourceMark rm(THREAD); 4978 assert(_class_name != NULL, "invariant"); 4979 Exceptions::fthrow( 4980 THREAD_AND_LOCATION, 4981 vmSymbols::java_lang_ClassFormatError(), 4982 "Illegal method name \"%s\" in class %s", bytes, 4983 _class_name->as_C_string() 4984 ); 4985 return; 4986 } 4987 } 4988 4989 4990 // Checks if signature is a legal field signature. 4991 void ClassFileParser::verify_legal_field_signature(const Symbol* name, 4992 const Symbol* signature, 4993 TRAPS) const { 4994 if (!_need_verify) { return; } 4995 4996 char buf[fixed_buffer_size]; 4997 const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 4998 const unsigned int length = signature->utf8_length(); 4999 const char* const p = skip_over_field_signature(bytes, false, length, CHECK); 5000 5001 if (p == NULL || (p - bytes) != (int)length) { 5002 throwIllegalSignature("Field", name, signature, CHECK); 5003 } 5004 } 5005 5006 // Checks if signature is a legal method signature. 5007 // Returns number of parameters 5008 int ClassFileParser::verify_legal_method_signature(const Symbol* name, 5009 const Symbol* signature, 5010 TRAPS) const { 5011 if (!_need_verify) { 5012 // make sure caller's args_size will be less than 0 even for non-static 5013 // method so it will be recomputed in compute_size_of_parameters(). 5014 return -2; 5015 } 5016 5017 // Class initializers cannot have args for class format version >= 51. 5018 if (name == vmSymbols::class_initializer_name() && 5019 signature != vmSymbols::void_method_signature() && 5020 _major_version >= JAVA_7_VERSION) { 5021 throwIllegalSignature("Method", name, signature, CHECK_0); 5022 return 0; 5023 } 5024 5025 unsigned int args_size = 0; 5026 char buf[fixed_buffer_size]; 5027 const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); 5028 unsigned int length = signature->utf8_length(); 5029 const char* nextp; 5030 5031 // The first character must be a '(' 5032 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { 5033 length--; 5034 // Skip over legal field signatures 5035 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5036 while ((length > 0) && (nextp != NULL)) { 5037 args_size++; 5038 if (p[0] == 'J' || p[0] == 'D') { 5039 args_size++; 5040 } 5041 length -= nextp - p; 5042 p = nextp; 5043 nextp = skip_over_field_signature(p, false, length, CHECK_0); 5044 } 5045 // The first non-signature thing better be a ')' 5046 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { 5047 length--; 5048 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { 5049 // All internal methods must return void 5050 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { 5051 return args_size; 5052 } 5053 } else { 5054 // Now we better just have a return value 5055 nextp = skip_over_field_signature(p, true, length, CHECK_0); 5056 if (nextp && ((int)length == (nextp - p))) { 5057 return args_size; 5058 } 5059 } 5060 } 5061 } 5062 // Report error 5063 throwIllegalSignature("Method", name, signature, CHECK_0); 5064 return 0; 5065 } 5066 5067 int ClassFileParser::static_field_size() const { 5068 assert(_field_info != NULL, "invariant"); 5069 return _field_info->static_field_size; 5070 } 5071 5072 int ClassFileParser::total_oop_map_count() const { 5073 assert(_field_info != NULL, "invariant"); 5074 return _field_info->total_oop_map_count; 5075 } 5076 5077 jint ClassFileParser::layout_size() const { 5078 assert(_field_info != NULL, "invariant"); 5079 return _field_info->instance_size; 5080 } 5081 5082 static void check_methods_for_intrinsics(const InstanceKlass* ik, 5083 const Array<Method*>* methods) { 5084 assert(ik != NULL, "invariant"); 5085 assert(methods != NULL, "invariant"); 5086 5087 // Set up Method*::intrinsic_id as soon as we know the names of methods. 5088 // (We used to do this lazily, but now we query it in Rewriter, 5089 // which is eagerly done for every method, so we might as well do it now, 5090 // when everything is fresh in memory.) 5091 const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik); 5092 5093 if (klass_id != vmSymbols::NO_SID) { 5094 for (int j = 0; j < methods->length(); ++j) { 5095 Method* method = methods->at(j); 5096 method->init_intrinsic_id(); 5097 5098 if (CheckIntrinsics) { 5099 // Check if an intrinsic is defined for method 'method', 5100 // but the method is not annotated with @HotSpotIntrinsicCandidate. 5101 if (method->intrinsic_id() != vmIntrinsics::_none && 5102 !method->intrinsic_candidate()) { 5103 tty->print("Compiler intrinsic is defined for method [%s], " 5104 "but the method is not annotated with @HotSpotIntrinsicCandidate.%s", 5105 method->name_and_sig_as_C_string(), 5106 NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.") 5107 ); 5108 tty->cr(); 5109 DEBUG_ONLY(vm_exit(1)); 5110 } 5111 // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate, 5112 // but there is no intrinsic available for it. 5113 if (method->intrinsic_candidate() && 5114 method->intrinsic_id() == vmIntrinsics::_none) { 5115 tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, " 5116 "but no compiler intrinsic is defined for the method.%s", 5117 method->name_and_sig_as_C_string(), 5118 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5119 ); 5120 tty->cr(); 5121 DEBUG_ONLY(vm_exit(1)); 5122 } 5123 } 5124 } // end for 5125 5126 #ifdef ASSERT 5127 if (CheckIntrinsics) { 5128 // Check for orphan methods in the current class. A method m 5129 // of a class C is orphan if an intrinsic is defined for method m, 5130 // but class C does not declare m. 5131 // The check is potentially expensive, therefore it is available 5132 // only in debug builds. 5133 5134 for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) { 5135 if (vmIntrinsics::_compiledLambdaForm == id) { 5136 // The _compiledLamdbdaForm intrinsic is a special marker for bytecode 5137 // generated for the JVM from a LambdaForm and therefore no method 5138 // is defined for it. 5139 continue; 5140 } 5141 5142 if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) { 5143 // Check if the current class contains a method with the same 5144 // name, flags, signature. 5145 bool match = false; 5146 for (int j = 0; j < methods->length(); ++j) { 5147 const Method* method = methods->at(j); 5148 if (method->intrinsic_id() == id) { 5149 match = true; 5150 break; 5151 } 5152 } 5153 5154 if (!match) { 5155 char buf[1000]; 5156 tty->print("Compiler intrinsic is defined for method [%s], " 5157 "but the method is not available in class [%s].%s", 5158 vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id), 5159 buf, sizeof(buf)), 5160 ik->name()->as_C_string(), 5161 NOT_DEBUG("") DEBUG_ONLY(" Exiting.") 5162 ); 5163 tty->cr(); 5164 DEBUG_ONLY(vm_exit(1)); 5165 } 5166 } 5167 } // end for 5168 } // CheckIntrinsics 5169 #endif // ASSERT 5170 } 5171 } 5172 5173 InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) { 5174 if (_klass != NULL) { 5175 return _klass; 5176 } 5177 5178 InstanceKlass* const ik = 5179 InstanceKlass::allocate_instance_klass(*this, CHECK_NULL); 5180 5181 fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL); 5182 5183 assert(_klass == ik, "invariant"); 5184 5185 return ik; 5186 } 5187 5188 void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) { 5189 assert(ik != NULL, "invariant"); 5190 5191 set_klass_to_deallocate(ik); 5192 5193 assert(_field_info != NULL, "invariant"); 5194 assert(ik->static_field_size() == _field_info->static_field_size, "sanity"); 5195 assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count, 5196 "sanity"); 5197 5198 assert(ik->is_instance_klass(), "sanity"); 5199 assert(ik->size_helper() == _field_info->instance_size, "sanity"); 5200 5201 // Fill in information already parsed 5202 ik->set_should_verify_class(_need_verify); 5203 5204 // Not yet: supers are done below to support the new subtype-checking fields 5205 ik->set_class_loader_data(_loader_data); 5206 ik->set_nonstatic_field_size(_field_info->nonstatic_field_size); 5207 ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields); 5208 assert(_fac != NULL, "invariant"); 5209 ik->set_static_oop_field_count(_fac->count[STATIC_OOP]); 5210 5211 // this transfers ownership of a lot of arrays from 5212 // the parser onto the InstanceKlass* 5213 apply_parsed_class_metadata(ik, _java_fields_count, CHECK); 5214 5215 // note that is not safe to use the fields in the parser from this point on 5216 assert(NULL == _cp, "invariant"); 5217 assert(NULL == _fields, "invariant"); 5218 assert(NULL == _methods, "invariant"); 5219 assert(NULL == _inner_classes, "invariant"); 5220 assert(NULL == _local_interfaces, "invariant"); 5221 assert(NULL == _transitive_interfaces, "invariant"); 5222 assert(NULL == _combined_annotations, "invariant"); 5223 5224 if (_has_final_method) { 5225 ik->set_has_final_method(); 5226 } 5227 5228 ik->copy_method_ordering(_method_ordering, CHECK); 5229 // The InstanceKlass::_methods_jmethod_ids cache 5230 // is managed on the assumption that the initial cache 5231 // size is equal to the number of methods in the class. If 5232 // that changes, then InstanceKlass::idnum_can_increment() 5233 // has to be changed accordingly. 5234 ik->set_initial_method_idnum(ik->methods()->length()); 5235 5236 ik->set_name(_class_name); 5237 5238 if (is_anonymous()) { 5239 // I am well known to myself 5240 ik->constants()->klass_at_put(_this_class_index, ik); // eagerly resolve 5241 } 5242 5243 ik->set_minor_version(_minor_version); 5244 ik->set_major_version(_major_version); 5245 ik->set_has_default_methods(_has_default_methods); 5246 ik->set_declares_default_methods(_declares_default_methods); 5247 5248 if (_host_klass != NULL) { 5249 assert (ik->is_anonymous(), "should be the same"); 5250 ik->set_host_klass(_host_klass); 5251 } 5252 5253 // Set PackageEntry for this_klass 5254 oop cl = ik->class_loader(); 5255 Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl)); 5256 ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh()); 5257 ik->set_package(cld, CHECK); 5258 5259 const Array<Method*>* const methods = ik->methods(); 5260 assert(methods != NULL, "invariant"); 5261 const int methods_len = methods->length(); 5262 5263 check_methods_for_intrinsics(ik, methods); 5264 5265 // Fill in field values obtained by parse_classfile_attributes 5266 if (_parsed_annotations->has_any_annotations()) { 5267 _parsed_annotations->apply_to(ik); 5268 } 5269 5270 apply_parsed_class_attributes(ik); 5271 5272 // Miranda methods 5273 if ((_num_miranda_methods > 0) || 5274 // if this class introduced new miranda methods or 5275 (_super_klass != NULL && _super_klass->has_miranda_methods()) 5276 // super class exists and this class inherited miranda methods 5277 ) { 5278 ik->set_has_miranda_methods(); // then set a flag 5279 } 5280 5281 // Fill in information needed to compute superclasses. 5282 ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK); 5283 5284 // Initialize itable offset tables 5285 klassItable::setup_itable_offset_table(ik); 5286 5287 // Compute transitive closure of interfaces this class implements 5288 // Do final class setup 5289 fill_oop_maps(ik, 5290 _field_info->nonstatic_oop_map_count, 5291 _field_info->nonstatic_oop_offsets, 5292 _field_info->nonstatic_oop_counts); 5293 5294 // Fill in has_finalizer, has_vanilla_constructor, and layout_helper 5295 set_precomputed_flags(ik); 5296 5297 // check if this class can access its super class 5298 check_super_class_access(ik, CHECK); 5299 5300 // check if this class can access its superinterfaces 5301 check_super_interface_access(ik, CHECK); 5302 5303 // check if this class overrides any final method 5304 check_final_method_override(ik, CHECK); 5305 5306 // check that if this class is an interface then it doesn't have static methods 5307 if (ik->is_interface()) { 5308 /* An interface in a JAVA 8 classfile can be static */ 5309 if (_major_version < JAVA_8_VERSION) { 5310 check_illegal_static_method(ik, CHECK); 5311 } 5312 } 5313 5314 // Obtain this_klass' module entry 5315 ModuleEntry* module_entry = ik->module(); 5316 assert(module_entry != NULL, "module_entry should always be set"); 5317 5318 // Obtain java.lang.reflect.Module 5319 Handle module_handle(THREAD, JNIHandles::resolve(module_entry->module())); 5320 5321 // Allocate mirror and initialize static fields 5322 // The create_mirror() call will also call compute_modifiers() 5323 java_lang_Class::create_mirror(ik, 5324 _loader_data->class_loader(), 5325 module_handle, 5326 _protection_domain, 5327 CHECK); 5328 5329 assert(_all_mirandas != NULL, "invariant"); 5330 5331 // Generate any default methods - default methods are interface methods 5332 // that have a default implementation. This is new with Lambda project. 5333 if (_has_default_methods ) { 5334 DefaultMethods::generate_default_methods(ik, 5335 _all_mirandas, 5336 CHECK); 5337 } 5338 5339 // Add read edges to the unnamed modules of the bootstrap and app class loaders. 5340 if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() && 5341 !module_entry->has_default_read_edges()) { 5342 if (!module_entry->set_has_default_read_edges()) { 5343 // We won a potential race 5344 JvmtiExport::add_default_read_edges(module_handle, THREAD); 5345 } 5346 } 5347 5348 // Update the loader_data graph. 5349 record_defined_class_dependencies(ik, CHECK); 5350 5351 ClassLoadingService::notify_class_loaded(ik, false /* not shared class */); 5352 5353 if (!is_internal()) { 5354 if (log_is_enabled(Info, classload)) { 5355 ResourceMark rm; 5356 const char* module_name = NULL; 5357 static const size_t modules_image_name_len = strlen(MODULES_IMAGE_NAME); 5358 size_t stream_len = strlen(_stream->source()); 5359 // See if _stream->source() ends in "modules" 5360 if (module_entry->is_named() && modules_image_name_len < stream_len && 5361 (strncmp(_stream->source() + stream_len - modules_image_name_len, 5362 MODULES_IMAGE_NAME, modules_image_name_len) == 0)) { 5363 module_name = module_entry->name()->as_C_string(); 5364 } 5365 5366 if (log_is_enabled(Info, classload)) { 5367 ik->print_loading_log(LogLevel::Info, _loader_data, module_name, _stream); 5368 } 5369 // No 'else' here as logging levels are not mutually exclusive 5370 if (log_is_enabled(Debug, classload)) { 5371 ik->print_loading_log(LogLevel::Debug, _loader_data, module_name, _stream); 5372 } 5373 } 5374 5375 if (log_is_enabled(Info, classresolve)) { 5376 ResourceMark rm; 5377 // print out the superclass. 5378 const char * from = ik->external_name(); 5379 if (ik->java_super() != NULL) { 5380 log_info(classresolve)("%s %s (super)", 5381 from, 5382 ik->java_super()->external_name()); 5383 } 5384 // print out each of the interface classes referred to by this class. 5385 const Array<Klass*>* const local_interfaces = ik->local_interfaces(); 5386 if (local_interfaces != NULL) { 5387 const int length = local_interfaces->length(); 5388 for (int i = 0; i < length; i++) { 5389 const Klass* const k = local_interfaces->at(i); 5390 const char * to = k->external_name(); 5391 log_info(classresolve)("%s %s (interface)", from, to); 5392 } 5393 } 5394 } 5395 } 5396 5397 TRACE_INIT_KLASS_ID(ik); 5398 5399 // If we reach here, all is well. 5400 // Now remove the InstanceKlass* from the _klass_to_deallocate field 5401 // in order for it to not be destroyed in the ClassFileParser destructor. 5402 set_klass_to_deallocate(NULL); 5403 5404 // it's official 5405 set_klass(ik); 5406 5407 debug_only(ik->verify();) 5408 } 5409 5410 ClassFileParser::ClassFileParser(ClassFileStream* stream, 5411 Symbol* name, 5412 ClassLoaderData* loader_data, 5413 Handle protection_domain, 5414 TempNewSymbol* parsed_name, 5415 const Klass* host_klass, 5416 GrowableArray<Handle>* cp_patches, 5417 Publicity pub_level, 5418 TRAPS) : 5419 _stream(stream), 5420 _requested_name(name), 5421 _loader_data(loader_data), 5422 _host_klass(host_klass), 5423 _cp_patches(cp_patches), 5424 _parsed_name(parsed_name), 5425 _super_klass(), 5426 _cp(NULL), 5427 _fields(NULL), 5428 _methods(NULL), 5429 _inner_classes(NULL), 5430 _local_interfaces(NULL), 5431 _transitive_interfaces(NULL), 5432 _combined_annotations(NULL), 5433 _annotations(NULL), 5434 _type_annotations(NULL), 5435 _fields_annotations(NULL), 5436 _fields_type_annotations(NULL), 5437 _klass(NULL), 5438 _klass_to_deallocate(NULL), 5439 _parsed_annotations(NULL), 5440 _fac(NULL), 5441 _field_info(NULL), 5442 _method_ordering(NULL), 5443 _all_mirandas(NULL), 5444 _vtable_size(0), 5445 _itable_size(0), 5446 _num_miranda_methods(0), 5447 _rt(REF_NONE), 5448 _protection_domain(protection_domain), 5449 _access_flags(), 5450 _pub_level(pub_level), 5451 _synthetic_flag(false), 5452 _sde_length(false), 5453 _sde_buffer(NULL), 5454 _sourcefile_index(0), 5455 _generic_signature_index(0), 5456 _major_version(0), 5457 _minor_version(0), 5458 _this_class_index(0), 5459 _super_class_index(0), 5460 _itfs_len(0), 5461 _java_fields_count(0), 5462 _need_verify(false), 5463 _relax_verify(false), 5464 _has_default_methods(false), 5465 _declares_default_methods(false), 5466 _has_final_method(false), 5467 _has_finalizer(false), 5468 _has_empty_finalizer(false), 5469 _has_vanilla_constructor(false), 5470 _max_bootstrap_specifier_index(-1) { 5471 5472 _class_name = name != NULL ? name : vmSymbols::unknown_class_name(); 5473 5474 assert(THREAD->is_Java_thread(), "invariant"); 5475 assert(_loader_data != NULL, "invariant"); 5476 assert(stream != NULL, "invariant"); 5477 assert(_stream != NULL, "invariant"); 5478 assert(_stream->buffer() == _stream->current(), "invariant"); 5479 assert(_class_name != NULL, "invariant"); 5480 assert(0 == _access_flags.as_int(), "invariant"); 5481 5482 // Figure out whether we can skip format checking (matching classic VM behavior) 5483 if (DumpSharedSpaces) { 5484 // verify == true means it's a 'remote' class (i.e., non-boot class) 5485 // Verification decision is based on BytecodeVerificationRemote flag 5486 // for those classes. 5487 _need_verify = (stream->need_verify()) ? BytecodeVerificationRemote : 5488 BytecodeVerificationLocal; 5489 } 5490 else { 5491 _need_verify = Verifier::should_verify_for(_loader_data->class_loader(), 5492 stream->need_verify()); 5493 } 5494 5495 // synch back verification state to stream 5496 stream->set_verify(_need_verify); 5497 5498 // Check if verification needs to be relaxed for this class file 5499 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) 5500 _relax_verify = Verifier::relax_verify_for(_loader_data->class_loader()); 5501 5502 parse_stream(stream, CHECK); 5503 5504 post_process_parsed_stream(stream, _cp, CHECK); 5505 } 5506 5507 void ClassFileParser::clear_class_metadata() { 5508 // metadata created before the instance klass is created. Must be 5509 // deallocated if classfile parsing returns an error. 5510 _cp = NULL; 5511 _fields = NULL; 5512 _methods = NULL; 5513 _inner_classes = NULL; 5514 _local_interfaces = NULL; 5515 _transitive_interfaces = NULL; 5516 _combined_annotations = NULL; 5517 _annotations = _type_annotations = NULL; 5518 _fields_annotations = _fields_type_annotations = NULL; 5519 } 5520 5521 // Destructor to clean up 5522 ClassFileParser::~ClassFileParser() { 5523 if (_cp != NULL) { 5524 MetadataFactory::free_metadata(_loader_data, _cp); 5525 } 5526 if (_fields != NULL) { 5527 MetadataFactory::free_array<u2>(_loader_data, _fields); 5528 } 5529 5530 if (_methods != NULL) { 5531 // Free methods 5532 InstanceKlass::deallocate_methods(_loader_data, _methods); 5533 } 5534 5535 // beware of the Universe::empty_blah_array!! 5536 if (_inner_classes != NULL && _inner_classes != Universe::the_empty_short_array()) { 5537 MetadataFactory::free_array<u2>(_loader_data, _inner_classes); 5538 } 5539 5540 // Free interfaces 5541 InstanceKlass::deallocate_interfaces(_loader_data, _super_klass, 5542 _local_interfaces, _transitive_interfaces); 5543 5544 if (_combined_annotations != NULL) { 5545 // After all annotations arrays have been created, they are installed into the 5546 // Annotations object that will be assigned to the InstanceKlass being created. 5547 5548 // Deallocate the Annotations object and the installed annotations arrays. 5549 _combined_annotations->deallocate_contents(_loader_data); 5550 5551 // If the _combined_annotations pointer is non-NULL, 5552 // then the other annotations fields should have been cleared. 5553 assert(_annotations == NULL, "Should have been cleared"); 5554 assert(_type_annotations == NULL, "Should have been cleared"); 5555 assert(_fields_annotations == NULL, "Should have been cleared"); 5556 assert(_fields_type_annotations == NULL, "Should have been cleared"); 5557 } else { 5558 // If the annotations arrays were not installed into the Annotations object, 5559 // then they have to be deallocated explicitly. 5560 MetadataFactory::free_array<u1>(_loader_data, _annotations); 5561 MetadataFactory::free_array<u1>(_loader_data, _type_annotations); 5562 Annotations::free_contents(_loader_data, _fields_annotations); 5563 Annotations::free_contents(_loader_data, _fields_type_annotations); 5564 } 5565 5566 clear_class_metadata(); 5567 5568 // deallocate the klass if already created. Don't directly deallocate, but add 5569 // to the deallocate list so that the klass is removed from the CLD::_klasses list 5570 // at a safepoint. 5571 if (_klass_to_deallocate != NULL) { 5572 _loader_data->add_to_deallocate_list(_klass_to_deallocate); 5573 } 5574 } 5575 5576 void ClassFileParser::parse_stream(const ClassFileStream* const stream, 5577 TRAPS) { 5578 5579 assert(stream != NULL, "invariant"); 5580 assert(_class_name != NULL, "invariant"); 5581 5582 // BEGIN STREAM PARSING 5583 stream->guarantee_more(8, CHECK); // magic, major, minor 5584 // Magic value 5585 const u4 magic = stream->get_u4_fast(); 5586 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, 5587 "Incompatible magic value %u in class file %s", 5588 magic, CHECK); 5589 5590 // Version numbers 5591 _minor_version = stream->get_u2_fast(); 5592 _major_version = stream->get_u2_fast(); 5593 5594 if (DumpSharedSpaces && _major_version < JAVA_1_5_VERSION) { 5595 ResourceMark rm; 5596 warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", 5597 _major_version, _minor_version, _class_name->as_C_string()); 5598 Exceptions::fthrow( 5599 THREAD_AND_LOCATION, 5600 vmSymbols::java_lang_UnsupportedClassVersionError(), 5601 "Unsupported major.minor version for dump time %u.%u", 5602 _major_version, 5603 _minor_version); 5604 } 5605 5606 // Check version numbers - we check this even with verifier off 5607 if (!is_supported_version(_major_version, _minor_version)) { 5608 ResourceMark rm(THREAD); 5609 Exceptions::fthrow( 5610 THREAD_AND_LOCATION, 5611 vmSymbols::java_lang_UnsupportedClassVersionError(), 5612 "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " 5613 "this version of the Java Runtime only recognizes class file versions up to %u.%u", 5614 _class_name->as_C_string(), 5615 _major_version, 5616 _minor_version, 5617 JAVA_MAX_SUPPORTED_VERSION, 5618 JAVA_MAX_SUPPORTED_MINOR_VERSION); 5619 return; 5620 } 5621 5622 stream->guarantee_more(3, CHECK); // length, first cp tag 5623 const u2 cp_size = stream->get_u2_fast(); 5624 5625 guarantee_property( 5626 cp_size >= 1, "Illegal constant pool size %u in class file %s", 5627 cp_size, CHECK); 5628 5629 _cp = ConstantPool::allocate(_loader_data, 5630 cp_size, 5631 CHECK); 5632 5633 ConstantPool* const cp = _cp; 5634 5635 parse_constant_pool(stream, cp, cp_size, CHECK); 5636 5637 assert(cp_size == (const u2)cp->length(), "invariant"); 5638 5639 // ACCESS FLAGS 5640 stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len 5641 5642 // Access flags 5643 jint flags = stream->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; 5644 5645 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { 5646 // Set abstract bit for old class files for backward compatibility 5647 flags |= JVM_ACC_ABSTRACT; 5648 } 5649 5650 _access_flags.set_flags(flags); 5651 5652 verify_legal_class_modifiers((jint)_access_flags.as_int(), CHECK); 5653 5654 // This class and superclass 5655 _this_class_index = stream->get_u2_fast(); 5656 check_property( 5657 valid_cp_range(_this_class_index, cp_size) && 5658 cp->tag_at(_this_class_index).is_unresolved_klass(), 5659 "Invalid this class index %u in constant pool in class file %s", 5660 _this_class_index, CHECK); 5661 5662 Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index); 5663 assert(class_name_in_cp != NULL, "class_name can't be null"); 5664 5665 if (_parsed_name != NULL) { 5666 // It's important to set parsed_name *before* resolving the super class. 5667 // (it's used for cleanup by the caller if parsing fails) 5668 *_parsed_name = class_name_in_cp; 5669 // parsed_name is returned and can be used if there's an error, so add to 5670 // its reference count. Caller will decrement the refcount. 5671 (*_parsed_name)->increment_refcount(); 5672 } 5673 5674 // Update _class_name which could be null previously 5675 // to reflect the name in the constant pool 5676 _class_name = class_name_in_cp; 5677 5678 // Don't need to check whether this class name is legal or not. 5679 // It has been checked when constant pool is parsed. 5680 // However, make sure it is not an array type. 5681 if (_need_verify) { 5682 guarantee_property(_class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, 5683 "Bad class name in class file %s", 5684 CHECK); 5685 } 5686 5687 // Checks if name in class file matches requested name 5688 if (_requested_name != NULL && _requested_name != _class_name) { 5689 ResourceMark rm(THREAD); 5690 Exceptions::fthrow( 5691 THREAD_AND_LOCATION, 5692 vmSymbols::java_lang_NoClassDefFoundError(), 5693 "%s (wrong name: %s)", 5694 _class_name->as_C_string(), 5695 _requested_name != NULL ? _requested_name->as_C_string() : "NoName" 5696 ); 5697 return; 5698 } 5699 5700 if (!is_internal()) { 5701 if (TraceClassLoadingPreorder) { 5702 tty->print("[Loading %s", 5703 _class_name->as_klass_external_name()); 5704 5705 if (stream->source() != NULL) { 5706 tty->print(" from %s", stream->source()); 5707 } 5708 tty->print_cr("]"); 5709 } 5710 #if INCLUDE_CDS 5711 if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) { 5712 // Only dump the classes that can be stored into CDS archive 5713 if (SystemDictionaryShared::is_sharing_possible(_loader_data)) { 5714 ResourceMark rm(THREAD); 5715 classlist_file->print_cr("%s", _class_name->as_C_string()); 5716 classlist_file->flush(); 5717 } 5718 } 5719 #endif 5720 } 5721 5722 // SUPERKLASS 5723 _super_class_index = stream->get_u2_fast(); 5724 _super_klass = parse_super_class(cp, 5725 _super_class_index, 5726 _need_verify, 5727 CHECK); 5728 5729 // Interfaces 5730 _itfs_len = stream->get_u2_fast(); 5731 parse_interfaces(stream, 5732 _itfs_len, 5733 cp, 5734 &_has_default_methods, 5735 CHECK); 5736 5737 assert(_local_interfaces != NULL, "invariant"); 5738 5739 // Fields (offsets are filled in later) 5740 _fac = new FieldAllocationCount(); 5741 parse_fields(stream, 5742 _access_flags.is_interface(), 5743 _fac, 5744 cp, 5745 cp_size, 5746 &_java_fields_count, 5747 CHECK); 5748 5749 assert(_fields != NULL, "invariant"); 5750 5751 // Methods 5752 AccessFlags promoted_flags; 5753 parse_methods(stream, 5754 _access_flags.is_interface(), 5755 &promoted_flags, 5756 &_has_final_method, 5757 &_declares_default_methods, 5758 CHECK); 5759 5760 assert(_methods != NULL, "invariant"); 5761 5762 // promote flags from parse_methods() to the klass' flags 5763 _access_flags.add_promoted_flags(promoted_flags.as_int()); 5764 5765 if (_declares_default_methods) { 5766 _has_default_methods = true; 5767 } 5768 5769 // Additional attributes/annotations 5770 _parsed_annotations = new ClassAnnotationCollector(); 5771 parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK); 5772 5773 assert(_inner_classes != NULL, "invariant"); 5774 5775 // Finalize the Annotations metadata object, 5776 // now that all annotation arrays have been created. 5777 create_combined_annotations(CHECK); 5778 5779 // Make sure this is the end of class file stream 5780 guarantee_property(stream->at_eos(), 5781 "Extra bytes at the end of class file %s", 5782 CHECK); 5783 5784 // all bytes in stream read and parsed 5785 } 5786 5787 void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream, 5788 ConstantPool* cp, 5789 TRAPS) { 5790 assert(stream != NULL, "invariant"); 5791 assert(stream->at_eos(), "invariant"); 5792 assert(cp != NULL, "invariant"); 5793 assert(_loader_data != NULL, "invariant"); 5794 5795 // We check super class after class file is parsed and format is checked 5796 if (_super_class_index > 0 && NULL ==_super_klass) { 5797 Symbol* const super_class_name = cp->klass_name_at(_super_class_index); 5798 if (_access_flags.is_interface()) { 5799 // Before attempting to resolve the superclass, check for class format 5800 // errors not checked yet. 5801 guarantee_property(super_class_name == vmSymbols::java_lang_Object(), 5802 "Interfaces must have java.lang.Object as superclass in class file %s", 5803 CHECK); 5804 } 5805 _super_klass = (const InstanceKlass*) 5806 SystemDictionary::resolve_super_or_fail(_class_name, 5807 super_class_name, 5808 _loader_data->class_loader(), 5809 _protection_domain, 5810 true, 5811 CHECK); 5812 } 5813 5814 if (_super_klass != NULL) { 5815 if (_super_klass->has_default_methods()) { 5816 _has_default_methods = true; 5817 } 5818 5819 if (_super_klass->is_interface()) { 5820 ResourceMark rm(THREAD); 5821 Exceptions::fthrow( 5822 THREAD_AND_LOCATION, 5823 vmSymbols::java_lang_IncompatibleClassChangeError(), 5824 "class %s has interface %s as super class", 5825 _class_name->as_klass_external_name(), 5826 _super_klass->external_name() 5827 ); 5828 return; 5829 } 5830 // Make sure super class is not final 5831 if (_super_klass->is_final()) { 5832 THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class"); 5833 } 5834 } 5835 5836 // Compute the transitive list of all unique interfaces implemented by this class 5837 _transitive_interfaces = 5838 compute_transitive_interfaces(_super_klass, 5839 _local_interfaces, 5840 _loader_data, 5841 CHECK); 5842 5843 assert(_transitive_interfaces != NULL, "invariant"); 5844 5845 // sort methods 5846 _method_ordering = sort_methods(_methods); 5847 5848 _all_mirandas = new GrowableArray<Method*>(20); 5849 5850 klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size, 5851 &_num_miranda_methods, 5852 _all_mirandas, 5853 _super_klass, 5854 _methods, 5855 _access_flags, 5856 _loader_data->class_loader(), 5857 _class_name, 5858 _local_interfaces, 5859 CHECK); 5860 5861 // Size of Java itable (in words) 5862 _itable_size = _access_flags.is_interface() ? 0 : 5863 klassItable::compute_itable_size(_transitive_interfaces); 5864 5865 assert(_fac != NULL, "invariant"); 5866 assert(_parsed_annotations != NULL, "invariant"); 5867 5868 _field_info = new FieldLayoutInfo(); 5869 layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK); 5870 5871 // Compute reference typ 5872 _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type(); 5873 5874 } 5875 5876 void ClassFileParser::set_klass(InstanceKlass* klass) { 5877 5878 #ifdef ASSERT 5879 if (klass != NULL) { 5880 assert(NULL == _klass, "leaking?"); 5881 } 5882 #endif 5883 5884 _klass = klass; 5885 } 5886 5887 void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) { 5888 5889 #ifdef ASSERT 5890 if (klass != NULL) { 5891 assert(NULL == _klass_to_deallocate, "leaking?"); 5892 } 5893 #endif 5894 5895 _klass_to_deallocate = klass; 5896 } 5897 5898 // Caller responsible for ResourceMark 5899 // clone stream with rewound position 5900 const ClassFileStream* ClassFileParser::clone_stream() const { 5901 assert(_stream != NULL, "invariant"); 5902 5903 return _stream->clone(); 5904 }